RU27445U1 - INSTALLATION FOR QUICK COOLING AND STORAGE OF MILK - Google Patents

Description

The unit for rapid cooling and storage of milk is a food-processing machine and can be used directly at a dairy farm or cattle farm, as well as at milk reception centers and dairies.

A known tank for receiving, cooling and storing milk, containing a horizontally located insulated tank with a lid, stirrer and hatches for receiving milk, internal inspection and sanitization of the tank, and a condensing and cooling unit. (Prospect of OJSC “Kurganselmash, Tank - milk cooler model ROZ - 2.5, TU 4741 - 099 00238523 - 2000).

Also known is the tank adopted as a prototype - a milk cooler, including a thermally insulated tank for receiving, cooling and storing milk, containing a stirring device, milk container, hatches for receiving milk, internal inspection and sanitization of the tank, as well as a cooling device, including a refrigeration unit for ice water, an evaporator, pumps, pipe fittings, automation devices and a control panel (Prospect OJSC Kurgansselmash Reservoir - milk cooler model RPO - 2.0 TU 4741 - 058 - 00238523 - 95).

A disadvantage of the known devices, including the prototype, is the long cooling time, as well as the possibility of freezing milk in the touch zone of the evaporator with a container for receiving, cooling and storing milk.

The objective of the utility model is to eliminate the shortcomings of known designs, namely, reducing the cooling time of milk to a temperature of 4.7 ° C, increasing its shelf life at a temperature of 5 ° C to 35 ° C and improving operational characteristics (economy, ease of use).

The task is achieved in that in the installation for rapid cooling and storage of milk, containing a device for receiving, cooling and storing milk, made in the form of a thermally insulated container with a stirrer, hatches for internal inspection, a hole for filling milk, highways with a shut-off valve for draining milk as well as a thermos, a refrigeration device for creating ice water, a device for irrigation of containers with ice water and a control panel,

- a device for receiving milk and is made in the form of an additional container in the form of a vertical cylinder with a removable lid and a convex elliptical bottom with a nozzle for draining milk, welded in the center of the bottom and equipped with a milk pump and technological supports;

-the device for quick cooling of milk is implemented as a counter-current heat exchanger with a pump for pumping ice water, while the inlet pipe of the milk line of the heat exchanger is connected to the outlet pipe of the milk pump of the device for receiving milk, the outlet pipe of the heat exchanger is connected with a tank for storing milk, and the water pipes of the heat exchanger connected to the pump and thermos;

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- the device for storing milk is made in the form of at least one capacity - a tank of cylindrical shape with an elliptical bottom and technological supports, in the upper part of which a collector of the tank irrigation device is arranged around the perimeter, having a box shape in section and equipped with a pipe for supplying ice water and gaps evenly spaced around the perimeter to create jets, while a double-walled cylinder is welded to the collector, the space between the walls of which is filled with thermal insulation, and the base is made in the form of ring mounted on a thermos, which is made in the form of a double-walled cylindrical thermally insulated tank, equipped with water pipes and an opening located in its upper part to exit the milk drain line from the storage tank, and a tube for water overflow is welded inside the thermos and the evaporator of the refrigeration device is mounted .

In addition, the milk line connecting the heat exchanger with the tank-tank is equipped with a swivel tube to allow milk to be poured into another tank.

In addition, level sensors are mounted electrically connected to the control panel on the milk receiving tank, temperature sensors are mounted on the milk storage tanks, and frozen-ice mass sensors are mounted on the thermos. In addition, it is equipped with a service platform.

The essence of the utility model is illustrated by the drawing, where in FIG. 1 shows a general view of the installation, FIG. 2 is a view A in FIG. 1, in FIG. 3 - high element B in FIG. 1, in FIG. 4 is a view B in FIG. 3, in FIG. 5 is a cross section of the GG in FIG. 2.

The structure of the installation includes: a tank 1 for receiving milk, a device 2 for cooling milk, a tank 3 for storing milk, a thermos 4, a service platform 5. The machine may additionally include a tank 6 for storing milk equipped with its own thermos 7.

The milk collecting tank 1 is made of stainless steel and equipped with a removable lid 8 with a hatch 9, in which (instead of the lid 10), when filtering milk, a filter 11 and a funnel 12 are installed. A pipe 14 is made on the bottom 13 of the elliptical shape, to which the input line 15 is connected milk pump 16 with a ball valve 17. Inside the tank 1 mounted sensors 18, 19 of the lower and upper milk levels, electrically connected to the control panel 20. The tank 1 is equipped with support racks 21.

The device 2 for cooling milk includes a milk pump 16 connected to the tank, a counterflow plate heat exchanger 22, an ice water pump 23, milk lines 15, 24 and water lines 25 and 26. The milk line 24 is made rotary taking into account the possibility of filling containers with milk 3 and 6 through hatches 27 and 28.

Tank 3 (6) for storing milk is made of stainless steel in the form of a double-walled cylinder, the outer wall of which is covered with heat insulation 29. A collector 30, which has a box-shaped cross section, is welded into the upper part of tank 3 (6). Along the perimeter of the collector 30, 140 slots were filled 31 with dimensions of 1 x 5 mm to create irrigation jets of the inner cylinder (tank) 32 of capacity 3, in which the cooled milk is located. Irrigation is carried out with ice water entering the collector 30 from a thermos 4 through line 33 with a pump 34 built into it to maintain the cooling mode. Capacity 3 (6) has rotary hinges 35 and 36 with hatches 37 and 38 for pouring chilled milk, crosshead 39 with stirrer 40, line 41 with milk pump 42 for pumping chilled milk into the vehicle, temperature control sensors 43 mounted on the outer wall tank 32, as well as technological support 44.

Thermos 4 (7) is made in the form of a thermally insulated tank 45 with a support platform 46 for installing a tank 3 and is equipped with adjustable supports 47. In a thermos 4, an evaporator 48 is mounted, made in the form of a spiral from a copper tube connected to a refrigeration unit 49. In addition , the thermos 4 is equipped with a pipe 50 for refueling with water, a tube 51 that automatically discharges water when refueling is above a predetermined level, a valve 52 for draining water and sensors 53 for controlling the mass of frozen ice.

The control sensors TeMnq) aTypbi 43 and the mass of frozen ice 53, as well as the sensors 18, 19, are electrically connected to the control panel 20, which is mounted on the tank 3 (6).

For ease of maintenance of the installation, a platform 5 was made on which the structural elements of the device 2 for milk cooling are mounted.

It should be noted that the filter 11 can be installed both in the filling funnel 12 and in the milk transfer line directly behind the milk pump 16.

The installation has a continuous mode of operation after its inclusion, while its work is functionally divided into the following modes:

-mode of preparation for milk intake;

- milk intake mode;

- milk storage mode;

-mode of milk supply to the vehicle;

sanitation mode.

Mode of preparation for milk intake

In this mode, the thermos 4 through the pipe 50 is filled with soft filtered water until it overflows through the pipe 51. The refrigeration unit 49 is turned on from the control panel, while the thermos 4 accumulates cold by freezing ice. This mode provides cooling of milk in the mode of its reception, determines the cyclical nature of the continuous operation of the entire installation and has an automatic cycle of operation. -It must be turned on 12 or 8 hours before the start of milk intake, depending on the number of milks (two or three). This is the time for the unit to enter the mode at maximum thermal loads, namely, at a temperature of water in a thermos of 4 and the room where it is located 32 ° C and a single milk intake of 2500 or 1850 liters at a temperature of 35 ° C.

After freezing the mass of ice (660 or 120) kg at the signal of the sensor 53, the cooling unit 49 is switched off.

Milk regimen

This mode is an automatic cycle for receiving and cooling milk to a temperature of 4.7 ° C. Before starting the installation, the rotary milk line is connected to a tank 3 (6) for storing milk, and the handle of a ball valve with a capacity of 1 is set to milk receiving mode. The mode is started from the control panel, in this case, if the temperature sensor 43 shows a temperature above 4.7 ° C, then the mixing device is turned on - the mixer 40 and the irrigation pump 34 of the tank 32 of the tank 3.

Installation work

water. Milk, passing through device 2 at a flow rate of 0.5 l / s, is cooled to a temperature of 4 - 6 ° C and enters the tank 3 (6) for storing milk, where it is finally cooled to a temperature of 3.5 ° C. If available in the tank 1 less than 5 liters of milk, at the command of the lower level sensor, the pumps of the cooling device 2 are turned off. When the milk temperature rises to 4.7 C, the stirrer is turned on by the signal of the temperature sensor 43 - the mixer 40 and the water pump 34 for supplying ice water for tank irrigation 32 tanks 3. With a decrease in the temperature of milk up to 3.5 ° C in a tank of 32 tanks 3 according to the signal of the temperature sensor 43, the mixing device - mixer 40 and the water pump 34 are turned off.

Milk storage mode

Designed to maintain the temperature of 3.5 - 4.7 ° C of milk in the tank 32 of the tank 3 during the entire storage time. In this mode, the refrigeration unit 49 operates the water pump 34 and the mixer 40. This mode is a continuation of the milk reception mode, but in the case of the reception mode shutdown it can be launched independently from the control panel.

The mode of supplying milk to the vehicle

Designed to supply milk from tank 3 (6) for storage in a vehicle. Before turning on the mode, the output line of the milk pump 42 is connected to the vehicle, the ball valve of the milk tank 3 opens and the pump 42 is turned on from the control panel. The mode is switched off by order from the control panel.

Sanitation mode

Sanitary treatment of the installation is carried out with solutions used in the milk industry for washing milking installations and dairy equipment. This mode is intended for washing milk lines, pumps, valves and milk tanks 1 and 3 (6) and is provided both manually and automatically with the pumps turned on from the control panel.

If necessary, to drain the water from the thermos 4, open the valve 52, when the refrigeration unit is turned off, 49 the ice melts, and the water drains into a drain or sewer.

According to the proposal, the PA company developed and manufactured the M - 3000 installation for quick cooling and storage of milk, the prototype of which was tested with positive results. The main technical characteristics of the installation, in comparison with the prototype, provide accelerated cooling of milk, and exclude its freezing in tank 3 for storage. The installation is convenient in operation and economical, while:

- milk cooling time from a temperature of 38 ° Сdo6 ° С - not more than 30 seconds at a productivity of 0.5 l / s;

- daily intake of milk with rapid cooling to a temperature of (3.5 - 4.7) C is up to 6 tons;

- preparation time at maximum volumes - no more than 14 hours;

Claims (4)

1. Installation for rapid cooling and storage of milk, containing a device for receiving, cooling and storing milk, made in the form of a thermally insulated container with a stirrer, hatches for internal inspection, a hole for filling milk, highways with a shut-off valve for draining milk, as well as a thermos, a refrigeration device for creating ice water, a device for irrigation of a container with ice water and a control panel, characterized in that the device for receiving milk is made in the form of an additional container in the form of a vertical cylinder Ndra with a removable lid and a convex elliptical bottom with a pipe for draining milk, welded in the center of the bottom, and equipped with a milk pump and technological supports; the device for rapid cooling of milk is made in the form of a counter-flow heat exchanger with a pump for pumping ice water, while the inlet pipe of the milk line of the heat exchanger is connected to the outlet pipe of the milk pump of the device for receiving milk, the outlet pipe of the heat exchanger is connected to the milk storage tank, and the water pipes of the heat exchanger are connected with pump and thermos; the device for storing milk is made in the form of at least one tank - a tank of cylindrical shape with an elliptical bottom and technological supports, in the upper part of which a collector of the tank irrigation device is made along the perimeter, having a box-shaped section and equipped with a pipe for supplying ice water slots evenly spaced around the perimeter to create jets, while a double-walled cylinder is welded to the collector, the space between the walls of which is filled with thermal insulation, and the base is made in the form of a ring mounted on a thermos, which is made in the form of a double-walled cylindrical thermally insulated tank, equipped with water pipes and an opening located in its upper part for the outlet of the milk drain line from the storage tank, and a tube for water overflow is welded inside the thermos and the evaporator of the refrigeration device is mounted .  2. Installation according to claim 1, characterized in that the milk line connecting the heat exchanger with the tank is equipped with a swivel tube to allow milk to be poured into another tank.  3. Installation according to claims 1 and 2, characterized in that level sensors are mounted electrically connected to the control panel on the milk receiving tank, temperature sensors are mounted on the milk storage tanks, and frozen-ice mass sensors are mounted on the thermos. 4. Installation according to claims 1, 2 and 3, characterized in that it is equipped with a service platform.