Pasteurization of milk and dairy products has become widespread in all countries of the world. It allows you to significantly increase the shelf life and sale of products.

Milk and dairy products are pasteurized in special containers, tubular pasteurization installations, as well as in plate pasteurization and cooling installations.

Tubular pasteurization plant

The tubular pasteurization unit consists of two centrifugal pumps, a tubular apparatus, a return valve, condensate drains and a control panel with instruments for monitoring and regulating the technological process.

The main element of the installation is a two-cylinder heat exchanger, consisting of an upper and a lower cylinder connected by pipelines. Tube sheets are welded into the ends of the cylinders, in which 24 tubes with a diameter of 30 mm are expanded each. Stainless steel tube sheets have milled short channels connecting consistently the ends of the pipes, thus forming a continuous coil with a total length of about 30 m. The end cylinders are closed with covers with rubber seals to ensure the tightness of the apparatus and isolate the short channels from each other.

Steam is fed into the annular space of each cylinder. Exhaust steam in the form of condensate is discharged using thermodynamic steam traps.

The heated milk moves in the inner tube space, passing successively the lower and upper cylinders. A control valve for steam supply is installed at the steam inlet, and a return valve is installed at the milk outlet from the apparatus, with the help of which the underpasteurized milk is automatically sent for repeated pasteurization. The return valve is connected through a temperature regulator with a temperature sensor, which is also located at the milk outlet from the apparatus. The unit is equipped with pressure gauges to control the pressure of steam and milk.

The processed product from the storage tank with the help of the first centrifugal pump is fed into the lower cylinder of the heat exchanger, where it is heated by steam to a temperature of 50-60 ° C and passes into the upper cylinder. Here it is pasteurized at a temperature of 80-90 ° C.

The second pump is designed to supply milk from the first cylinder to the second. It should be noted that in tubular pasteurization plants, the speed of movement of various products is not the same. In the installation for pasteurization of cream, the speed of their movement in the tubes of the heat exchanger is 1.2 m / s. In the course of heat exchange, the cream is fed into the cylinders of the pasteurizer using a single centrifugal pump. The speed of milk movement due to the use of two pumps is higher and amounts to 2.4 m / s.

The advantages of tubular pasteurization plants in comparison with plate-type ones are the significantly smaller number and size of sealing gaskets, and the disadvantages are large dimensions and high metal consumption; in addition, when cleaning and washing these units, free space is required on the side of the ends of the heat exchanger cylinders.

Tubular installations are effective if the subsequent milk processing process is carried out at a temperature slightly different from the pasteurization temperature.

Plate pasteurization and cooling unit

Plate and asterization-cooling units are used for heat treatment of milk, cream and ice cream mixtures. The design of each of these installations has its own characteristics, which are reflected in the description of equipment for the production of various dairy products.

The composition of the plate pasteurization and cooling unit used for heat treatment of milk, includes an equalizing tank, centrifugal pumps for hot water and milk, a plate apparatus, a milk separator, a holding tank, a non-return valve, a heating system and a control cabinet.

The centrifugal pump is designed to take milk from the equalizing tank and feed it into the vane apparatus. To prevent air leaks into the pump, a certain milk level (at least 300 mm) is maintained in the surge tank using a float mechanism. Failure to do so leads to foaming, which reduces the efficiency of pasteurization.

The plate pasteurization-cooling unit has a main front post and an auxiliary rear post, into which the ends of the upper and lower horizontal rods are fixed. The upper one is intended for suspension of heat exchange plates. On the periphery of each plate, a large rubber gasket is placed in a special groove, which hermetically seals the channel.

The plates have holes with small rubber O-rings. After the plates are assembled, two isolated systems of channels are formed in the apparatus, through which milk and cooling liquid move.

The lamellar apparatus is equipped with stainless steel heat exchange plates, divided into five sections: the first and second stages of regeneration, pasteurization, cooling with artesian water and cooling with ice water. Some plate apparatus have one regeneration section. The sections are separated from each other by special intermediate plates with fittings at the corners for supplying and removing liquids. Serial numbers are stamped on the plate, the same numbers are indicated on the plate layout diagram.

The plates are pressed against the rack using a plate and hold-down devices. The compression ratio of the thermal sections is determined from a table with a scale installed on the upper and lower struts. Zero graduation is set along the axis of the vertical strut bolt, it corresponds to the minimum compression, ensuring tightness.

In high-capacity plants, the lamellar devices have a two-sided arrangement of sections in relation to the main rack.

The composition of the pasteurization and cooling unit also includes milk separator and soak. Milk purifier serves for cleaning milk. When using a cleaner with centrifugal sludge discharge, one separator is installed, with a manual one - two.

The holding device is one of the main elements of pasteurization and cooling installations. In it, milk is kept at the pasteurization temperature for a certain time (20 or 300 s), necessary for the completion of the bactericidal effect of the temperature.

The holder consists of one or four cylinders, which are fixed on tubular supports. In some installations, the holding device is made in the form of four spiral-shaped sections made of pipes with a diameter of 60 mm.

The return, or bypass, electro-hydraulic valve serves to automatically switch the milk flow to repeated pasteurization when its temperature drops in the pasteurization section.

The work of the pasteurization and cooling plant in the production of drinking milk is as follows. Milk from the storage tank is directed by gravity or under pressure to the surge tank, from where it is pumped to the first regeneration section of the plate apparatus. Heated to 37-40 ° C, it enters the milk purifier for cleaning from mechanical impurities and goes for further heating to the second regeneration section and pasteurization section, where it is heated to 90 ° C. From the pasteurization section, milk is sent through an electro-hydraulic bypass valve to the holding tank, stays there for up to 300 s, then enters the regeneration section to transfer heat to the counter flow of milk entering the apparatus. After that, it enters sequentially into the water and brine cooling sections, where it is cooled to 8 ° C, and leaves the installation.

Milk is cooled with artesian and ice water or brine coming from a refrigeration unit. Cooling milk to a temperature not exceeding 8 ° C is possible only with a normal frequency of water and brine supply in the cooling section. The entire pasteurization process is automatically controlled.

The required pasteurization temperature is maintained by an electronic bridge. The adjustment is smooth. The pasteurization temperature is recorded on the chart tape of the control device. Sound and light alarm is triggered when the pasteurization temperature drops below given parameters.

To heat the product, in addition to hot water, steam or electricity, in some pasteurization and cooling installations, infrared heaters are used as a source of direct heating of milk. In installations with a small capacity, milk is fed for processing with an infrared emitter in a thin layer.

Plate pasteurization and cooling units have a number of advantages in comparison with other types of heating devices:

• small working capacity, which allows automation devices to more accurately track the progress of the technological process (in a plate installation, the working capacity is three times less than in a tubular installation of the same capacity);
• the ability to work efficiently enough with a minimum thermal head; minimal heat gains and losses of heat and cold (thermal insulation is usually not required);
• significant saving (80 ... 90%) of heat in the regeneration sections (specific steam consumption in plate installations is 2-3 times less than in tubular ones, and 4-5 times less than in capacitive heat exchangers);
• small installation area (plate installation occupies about 4 times less surface than tubular installation of similar performance);
• the ability to change the number of plates in each section, which makes it possible to adapt the heat exchanger to a specific technological process;
• the possibility of a CIP circulating cleaning of the equipment.

One of the promising areas of improvement pasteurizing installations is the use of rotary heaters in them, the special design of which allows, due to molecular friction of the particles of the processed product, to heat the latter to a predetermined temperature. The temperature of the heat treatment of the product depends on the time it is in the rotary heater and can be adjusted within wide limits. At the same time, the product is homogenized.

Appointment

Pasteurization and cooling of milk, juices, juice drinks, wines, wine materials, beer, kvass, and other liquid food products.

Executions:

• Automated pasteurizers for the production of drinking milk.
• Automated multifunctional pasteurizers for the production of drinking milk and the simultaneous preparation of milk for fermentation and heating processes.
• Semi-automatic manual pasteurizers.

Additional option: execution of the pasteurizer with the function of sanitizing the lines for feeding and dispensing the product.

Specifications

Parameters
Productivity, l / hour *
Pasteurization mode, ° С	79 - 120 (set from the control panel)
Inlet product temperature, ° С
Product outlet temperature, ° С - for cold filling - for hot filling	4 - 6 Free (set from the control panel)
Exposure time, sec. **	20–25 (for drinking milk) 300 (milk for fermented milk products)
Heat carrier: Primary - secondary	Steam Hot water (hot water temperature is 3-5 ° C higher than the set temperature of product pasteurization).
Coolant	Ice water (+ 1 - + 3 ° С), glycol solutions, brines
Inlet and outlet diameters product branch pipes, mm	DN 35 (DIN)	DN 50 (DIN)	DN 50 (DIN)

* The capacity of pasteurization and cooling units can be set by the Customer arbitrarily in the range of up to 25,000 l / h
** The holding time at the pasteurization temperature can be specified by the Customer, arbitrary.

THE POSSIBILITY OF SYNCHRONIZING THE PASTEURIZERS 'PRODUCTIVITY WITH THE PRODUCTIVITY OF THE FILLING LINE.

The implementation of various temperature regimes of product processing in one installation and the ability to connect external equipment (separator, homogenizer) ensures the versatility of the pasteurizer.

Principle of operation:

1. The original product enters the receiving tank, in which, thanks to a special device, it is filled to a certain level. From the receiving tank, the product is pumped into the regeneration section (s) of the multi-section plate apparatus for preheating and is then sent to the pasteurization section, where it is heated to a predetermined temperature. Further, the heated product enters the holding tank, from which it is sent sequentially to the regeneration and cooling sections. At the request of the customer, the recuperation sections can have outputs to a separator and a homogenizer.
2. The product is heated to the required temperature in the pasteurization section with hot water circulating in a closed steam heating loop.
3. Milk is cooled to the required temperature in two stages according to the counterflow principle: first, in the regeneration section (s) with the initial cold product and then, in the cooling section, with a coolant (ice water, etc.)
4. The multifunctional pasteurizer has an additional hot water preparation circuit and additional sections of a plate heat exchanger to provide different product temperatures at the outlets, for example, for hot filling, or for discharging warm pasteurized milk for its further fermentation and obtaining fermented milk products.

Automation:

The process of processing the product in the pasteurizer is fully automated. The process control system is based on programmable controllers from Omron (Japan). The accuracy of maintaining the temperature regime of pasteurization is ensured by the implementation of the PID law of automatic temperature control when controlling the steam supply valve.

Permission for the initial dispensing of the product is given by the operator. Further, the control system monitors the temperature regime of pasteurization, and in case of its violation, the installation goes into a state of circulation along the internal circuit until the preset regime is restored.

The use of the operator's touch panel allows for a variety of visualization of the process in digital and graphic forms with the issuance of messages for operator actions and emergency situations (SKADA-system functions). The parameters of the technological process of pasteurization are set in a separate window. The pasteurizer implements the function of archiving the values ​​of the process parameters on a form of information carrier convenient for the customer, which makes it possible to document the entire technological process.

A high degree of automation with the use of USB and Ethernet ports allows, at the request of the customer, to provide the ability to connect the pasteurizer to the upper-level system and the industrial control system.

SEMI-AUTOMATIC PASTEURIZERS WITH MANUAL CONTROL.

All pasteurizers of the OKL series are similar in design.

In manually controlled pasteurizers, switching on of pumps, heating of hot water and product circuits, as well as modes "circulation", "pasteurization", "drain" is carried out by switches. The temperature regime is set and controlled according to the PID law by Omron temperature regulators, which control the steam supply valves in the hot water preparation circuits.

Permission for the primary dispensing of the product is also given by the operator, and then the control system monitors the temperature regime of pasteurization, and in case of its violation, the unit switches to the state of circulation along the internal circuit until the preset regime is restored.

The visualization of the state of the installation is carried out by light indicators, and the temperature regimes are indicated on the temperature controllers. For archiving temperature conditions, a paper or electronic recorder is used. The setting of temperature regimes is performed by the operator on the temperature regulators and on the recorder on which the temperature graph is also visible.

The pasteurizer also controls the product level in the receiving tank and the pressure in the product lines and hot water circuits.

CONSTRUCTION FEATURES (for all versions of pasteurizers):

1. The plate heat exchanger has several sections (for the basic version - 3 sections: regeneration, pasteurization and cooling) and consists of a frame with clamping devices, a set of heat exchange plates with seals, separating and pressure plates. The plate apparatus uses heat exchange plates stamped from stainless steel sheet. On both sides of each plate there are channels through which, on one side, the product moves, and on the other, a heat carrier or coolant. The tightness in the assembled device is created by rubber gaskets (NBR, EPDM) inserted into special grooves in the plates.
2. The holding device is a pipeline system that provides a certain holding time of the product at the pasteurization temperature.
3. The receiving tank is a cylindrical container with a level regulator that ensures a constant level of the product.
4. The hot preparation block is made using a brazed heat exchanger, an expansion tank and a safety group.
5. To supply hot water to the pasteurization circuit, a stainless steel centrifugal pump from Grundfos (Germany) is used.

The main advantages of heat exchangersbased on API Schmidt-Bretten plates (Germany):

• Efficient heat transfer due to a special corrugated profile of the flow part of the plate, which forms three-dimensional turbulent flows. This minimizes the likelihood of contamination deposition on the surface of the plates.
• Double sealing of heat transfer plates in the area of ​​inlet and outlet of media, which prevents the media from shifting.
• The presence of a special leakage edge in the seal area. In case of depressurization of one of the seals, the medium will flow out without mixing with the other.
• In addition to the function of separating the media, the seals center the plate pack. The seals are fixed in the plates with special clips in only one direction, which greatly facilitates the assembly technology.

We are engaged in the manufacture of pasteurizers for milk and other products.

Pasteurization and cooling plants

In any dairy industry, you cannot do without a pasteurization and cooling unit - a heat exchanger that allows you to process milk and milk mixtures. Pasteurization is generally an irreplaceable process in the production of dairy products, serving for its disinfection (destruction of microorganisms) and conservation. Therefore, the pasteurization and cooling unit is one of the main types of equipment involved in the technological chain of production, in addition, it allows you to diversify the range of products. For the manufacture of heat exchangers, Avangard LLC uses only plates with glueless fastening of rubber seals. The seals can withstand temperatures up to 130 ° C, which makes it possible to completely eliminate high-temperature pasteurization in tubular pasteurizers when heated with steam. The new shape of the heat exchanger plates allows to increase the heat transfer coefficient and the coefficient of regeneration, to make the installations more compact and more economical. The specially thought-out profile of the plates avoids the formation of dead zones in the heat exchanger.

For pasteurization of the product, a closed circulation water heating system has been developed and implemented. This system allows for pasteurization from 60 to 125 ° C with the consumption of steam energy only for heating the product.

In our pasteurization and cooling units, only the "soft" mode of pasteurization is used, with a temperature difference between the coolant and the product no more than 2 ° C, which excludes burnt-on and coagulation of protein on the heat exchanger plates. Our units are equipped with an alarm system when the temperature difference between the coolant and the product is exceeded, which indicates the need to wash the heat exchanger, and does not allow low-quality pasteurization!

When the unit is operated together with a separator, homogenizer, or other additional equipment, it is possible to smoothly adjust the capacity and maintain a constant product pressure at the outlet.

The equipment of the units with an automatic valve with a positioner provides cooling of the product to the set temperature with an accuracy of 0.5 ºС.

Depending on the model, pasteurization and cooling plants may differ in performance and temperature conditions, but if all requirements are met, the quality of the resulting product remains unchanged.

Combined pasteurization and cooling plants, type OPT-3

Purpose: Designed for pasteurization and cooling of milk, ice cream mixtures, dairy and other food products in a closed flow.

Principle of operation

The product enters the surge tank (1) with float level regulator. Centrifugal pump (2) from the surge tank the product is fed to the regeneration section of the plate apparatus (3) for heat exchange with pasteurized product. From the regeneration section, the product enters the pasteurization section (4) and on the switching valve (5) ... If the pasteurization temperature is correct, the product goes to the holding (6) , the regeneration section, where it is cooled with the raw product, in the cooling section and exits the installation. If the pasteurization temperature is lower than the preset temperature, then by the signal of the control equipment, the valve is automatically switched (5) and the product is directed to the surge tank.

The parameters of the heating medium are automatically adjusted depending on the temperature of the product.
The installation is controlled from the control panel (7) .

Call and order:

Specifications:

Pasteurization and cooling plants for milk

Intended for cleaning, pasteurization and cooling of milk in a continuous thin-layer closed flow with automatic control and regulation of the technological process.

Designed and manufactured with a capacity of 1000 to 25000 liters per hour for processed milk.

The installation includes:

lamellar apparatus

tubular heat exchanger

holding tank

tubular holding

receiving tank

boiler unit


Specifications:

	A1-OKL-3	A1-OKL2L-5	A1-OKL-10	A1-OKL-15
Productivity, l / hour	3000	5000	10000	15000
Temperature, ° С
Product at the entrance to the machine	5...10	5...10	5...10	5...10
Heating in the apparatus	76...80	76...80	76...80	76...80
Cooling	2...6	2...6	2...6	2...6
Ice water	+1	0...1	+1	0...1
Frequency rate of ice water	4	3	3	2
Pressure, MPa
Ice water	0,15	0,15	0,25	0,3
Heating steam	0,3	0,3	0,3	0,45
Worker in the apparatus	0,3	0,3	0,35	0,35
Heat exchange surface of the plate, m2	0,2	0,2	0,2	0,55
Number of plates, pcs.	76	122	249	182
Regeneration rate,%	85	88	85	90,5
Consumption per hour of work:
	45	80	173	185
electricity, kW	9	10	12,5	11,7
cold (rejected heat), kW	15,7	11,71	16,3	7,9
Overall dimensions, mm	3700x3530x2500	3700x3600x2500	5400x3500x2500	4685x3850x2500
Occupied area, m2	13,1	13,3	19	18
Installation weight, kg	2000	1990	2800	4400


Specifications:

Productivity per hour, l	not less than 25000
Productivity, l / hour	3000
Milk temperature, ° С: entering the device
Pasteurization	76…80
Cooling	2…6
Return of non-pasteurized	75
Coming in for cleaning	65…71
Steam pressure before the control valve, MPa	0,45…0,6
Steam consumption, kg / h	no more than 364
Coolant temperature (ice water), ° С	0…1
Ice water pressure in front of the apparatus, MPa	not less than 0.3
Temperature (hot water) of the heat carrier, ° С	79…100
Power of installed electric motors, kW	35
Electricity consumption, kW / h	not more than 32
Regeneration rate,%	85
Occupied area, m2	25
Overall dimensions, mm	no more than 6410х3900х2500
Installation weight, kg	6200

The pasteurization and cooling unit is used to pasteurize and cool fermented milk products. In other words, this setting is necessary for all businesses that work with this category of goods. In addition, this unit is equipped with an automatic temperature control and regulation system, which makes its use even more convenient.

Installation Description

Today there are tubular and plate installations. Next, a second type of device of such devices will be described. So, a plate pasteurization and cooling unit consists of such basic elements as:

• plate heat exchanger;
• a system designed for the preparation of hot water (it includes a pump, an injector and a convection-type tank).

The main purpose of this system is that it heats the food to the ripening temperature. There is also a pump for the products themselves. Naturally, since there is an automatic system for monitoring and regulating parameters, then there is also a control panel for this system. It is important to note that the pasteurization and cooling unit is quite compact and designed in a modular style. The only thing is the holding device, which is a separate structural element. With respect to installation, it can be mounted in any accessible place. The result is a convenient system that has everything you need for automatic operation, while taking up little space.

Installation purpose

A pasteurization and cooling unit is designed to perform such actions as:

• Heating the dairy product to a temperature of 55-60 degrees Celsius (separation temperature).
• Heating up to a temperature of 75-80 degrees (milk homogenization).
• Preheating to pasteurization temperature of a dairy product - 90-95 degrees.
• The equipment also holds the product at its pasteurization temperature for 300 seconds.
• The last operation is the cooling of the product to the fermentation temperature, that is, up to 20-50 degrees.



Purpose of elements

The plate pasteurization and cooling unit for milk is also capable of handling liquid products such as beer, juice, wine, drinks, alkalis and others. A plate heat exchanger is responsible for heating and cooling these products. All operations are carried out with a closed stream. It should also be noted that due to the high thermal efficiency of such heat exchangers, they have a compact size. As for the efficiency, it is more than 90% for all installations based on this model. All parts of the pasteurization and cooling unit that come into contact with food during operation are made of steel approved for use in the food industry.

The coolant in such systems is either water or brine. The heat carrier can also be water or steam. The device has which consists of plates, a bed and a pressure plate. All these parts are pulled together by fixing pins.



Installation specifications

The pasteurization and cooling plant for milk has a certain number of technical parameters, which vary depending on the model. Next, the parameters of the PBK-1 product will be described.

The first and most important parameter is, of course, performance. For this equipment, it is in the range from 1000 to 10,000 l / h. The next parameter is the temperature of both the coolant and the coolant in the system. The difference between the output products and these media is 2 to 4 degrees Celsius at a factor of 1/3. All models also differ in their dimensions, but not too much, and the parameter itself is not very important. The material used for the manufacture of the plate is steel grade 12X18H10T. The thickness of the plates is 0.6 mm. The maximum temperature for PBK-1 is 150 degrees.



The principle of operation of the pasteurization and cooling unit

In an automatic plate-type system, the workflow is as follows.

The production facility has a milk collector that is connected to the surge tank of the device. From the collector to this module, the products come either with the help of a pump or by gravity. Here, it is important to ensure that the milk level does not fall below 300 ml, otherwise air will start leaking into the milk pump. The pump then pumps the product into the first section of the heat exchanger. Here the dairy product is heated, as heat exchange takes place with the hot milk coming from the pasteurization section through the holding tank. Here the temperature of the object rises to about 47-50 degrees Celsius, after which the milk is pumped through the purifier into the second section. The food is reheated here. Heat exchange takes place with the same pasteurized milk that passed the preliminary type heat exchange in section number 1. After this procedure is completed, the milk enters the pasteurization section, which is considered the third. Here, ordinary water acts as a coolant. The heat exchange lasts until the dairy product heats up to 76 degrees Celsius.

Further, as described above, the pasteurized milk returns through sections 1 and 2, where it gives off heat, thereby cooling down to 20-25 degrees. After that, the products are pumped into a cooler, where the temperature drops to 5-8 degrees. The fully chilled milk is then fed into storage tanks. This is where the work of the pasteurization and cooling plant for milk ends.



Installation of tubular type

The description above referred to a plate-type device, but there is also a second - tubular. Such devices consist of a tubular apparatus, two centrifugal pumps, a return valve, condensate drainage units, as well as a control panel designed to control automatic devices for regulation and operation control.



Description of the unit elements

Tubular pasteurization and cooling plant includes in its composition It consists of two cylinders, upper and lower, which are interconnected by means of a pipe system. Tube sheets are welded into the ends of these cylinders, each of which contains 24 tubes with a diameter of 30 mm. The grilles are made of stainless steel and also have short ducts. These channels connect all 24 pipes. The result is a continuous type coil with a total length of about 30 m. The cylinders, in turn, are closed with covers, which are fitted with rubber seals. This is done not only in order to create a completely sealed structure, but also in order to separate the short channels from each other.

In the operation of the device, steam is present, which, upon entering, enters the space between the cylinders. After it has worked, it is removed from the device in the form of condensate using thermodynamic type steam traps.



The essence of the unit

The milk to be heated moves in turn through the upper and then the lower cylinder. It moves along the in-pipe space. The unit also has a valve that regulates the steam supply. It is located immediately at the inlet of this substance. There is one more valve at the outlet of the device, but of a return type. It works in an automatic mode, and its main purpose is to return unpasteurized milk for a second operation. To perform this function, the mechanism is connected to a temperature sensor through a device such as a temperature regulator, which is also located at the milk outlet. Since there is steam and milk pressure in the device, the unit also has several pressure gauges.

It is worth noting that the processing starts from the lower cylinder, where steam is present, which heats the milk to a temperature of 50-60 degrees. Milk enters the lower part under the influence of the first centrifugal pump. A second pump is used for pumping to the upper one. In the upper part, the substance is pasteurized to a temperature of 80-90 degrees Celsius.

The main advantages of the installation

This equipment has become widespread, as it stands out for a number of significant advantages that are important for this industry. Firstly, the device fully complies with thermal conditions both during pasteurization and cooling. At the same time, the specified performance is maintained. Secondly, the modular design minimizes the size of the device, which makes it compact and, therefore, convenient for placement and use.

Automatic pasteurization and cooling plants Normit Paster 3000 and 5000 l / h

The pasteurization unit is skid-mounted and delivered ready for use.

It takes only 1-3 days for commissioning.
The unit is completely made of steel AISI 304/316 and / or higher. Milk productivity: 3000-5000 l / h. It is intended for the production of heat-treated dairy products in the most gentle way in order to obtain high-quality products without the destruction of protein, milk sugar and fat molecules.
Fully automated and equipped with flow rate control, the unit changes the product flow rate depending on the performance of the separator and fat standardizer.
Product and heating water temperature sensors monitor the delta T value to prevent protein breakdown at different pasteurization flow rates and temperatures.

The unit is equipped with pressure and temperature control and diverter valves according to the latest EU hygiene directives, temperature and event logging is also carried out.
The control is based on a Siemens PLC with a touch panel. It only requires connection to the supply lines of water, steam, electricity, to the sewerage system, and to the milk inlet / outlet and CIP sink. The unit is supplied as a complete unit, which is shown on the attached technological diagram. All plate heat exchangers, pumps and valves are manufactured by Alfa Laval. Flow sensors, level controllers from Endress + Hauser, other sensors - IFM.
General control based on Siemens PLC. Heat exchanger plates - stainless steel AISI316 or

above. Maximum pressure- 10/13 bar.
POU warns mixing unpasteurized and pasteurized product thanks to tight differential pressure control.
The minimum differential pressure is 0.5 bar. Functions and safety systems comply with EU hygiene requirements.
The pasteurization plant consists of the following main elements: 1 Pasteurizer with a capacity of 3,000 - 5,000 l / h, including 2 regeneration sections, 1 pasteurization section and 1 cooling section.
The outlet between regeneration sections 1 and 2 is intended for a separator / bactofuge / homogenizer.