Apparatus for temperature control suspension

 

(57) Abstract:

The invention relates to nutritional and microbiological industry, in particular the yeast production, and is used for cooling and temperature control of the commodity concentrate yeast. Apparatus for temperature control of the suspension is a vertical cylindrical tank equipped with surface heat exchanger in the form of a coil. The latter is located above the upper level of the slurry in the tank. The tank is also equipped with closed loop circulation of the suspension containing placed above the coil dispenser suspension for irrigation of its coils and pump, the suction nozzle which is connected to the exhaust tube of the suspension from the tank and its discharge nozzle to the dispenser suspension. It can be made in the form of a hollow ring with holes and a diameter equal to the diameter of the coil, which is located coaxially with the latter. The pipeline supply of coolant should be attached to the upper turn of the coil. The design of the device provides intensive heat exchange with the establishment of a film mode of the suspension flow over the entire surface of the heat exchanger. 2 C.p. f-crystals, 1 Il.

Izobretatel - yeast production for cooling and temperature control yeast concentrate.

Known apparatus for temperature control suspension (yeast), which is a vertical cylindrical tank equipped with surface heat exchanger located on the outer surface of the vessel wall and constituting a shirt with pipes for supplying and discharging the coolant pipe inlet and outlet of the suspension attached to the lid and the bottom of the tank, and a blade-side agitator for mixing suspensions (shishatskiy Y. I., Semenov N. F., Fedorov, C. A., V. I. Vostrikov, S. C., Handbook mechanics yeast production. M: Agropromizdat, 1987, S. 130).

In this apparatus during filling of the tank in heat exchange part is not the whole surface of the heat transfer, but only that part, which at this time is under the level of the cooled suspension. Since the capacity of the apparatus is large, the period of its filling has considerable duration, and during this period the average heat transfer involved only half of the surface of the heat exchanger. In addition, agitation of the slurry mixer is not effective for sediment, nakaplivalos the antibody of the invention is to improve the efficiency of the device by the intensification of heat exchange.

This result is achieved by the fact that in the proposed device for temperature control suspension, which is a tank, provided with a surface heat exchanger and pipes for supplying and discharging the suspension and the coolant heat exchanger in the form of a coil and is located above the upper level of the suspension.

The tank is equipped with closed circuit circulation of the latter, containing placed above the coil dispenser suspension for irrigation of its coils and pump, the suction nozzle which is connected to the pipe outlet slurry from the tank and its discharge nozzle to the dispenser suspension.

The latter should be done in the form of a hollow ring with holes and a diameter equal to the diameter of the coil, which is located coaxially with him. The pipe supply coolant must be attached to the upper turn of the coil.

The invention is illustrated in the drawing, which shows the proposed device in longitudinal section.

Apparatus for temperature control of the suspension is a vertical cylindrical tank 1, provided with a surface heat exchanger in the form of coil 2 and located above the upper level of the suspension and Shamkhani its coils and the pump 4, the suction nozzle 5 with a valve 6 which is connected to the pipe 7 removal of the suspension from the tank, attached to the conical bottom of the last 8, and the discharge pipe 9 of the pump through the pipe 10 and valve 11 to the distributor suspension. The latter may have a different design and, in particular, it should be done in the form of a hollow ring with the holes 12 and the diameter equal to the diameter of the coil is located coaxially with the latter. The pipe 13 for supplying coolant to the valve 14 attached to the upper turn of the coil 2, and the pipe 15 of his challenge to the last round. The pipeline 16 drain the cooled suspension with valve 17 is connected to the pressure pipe 9 of the pump and piping for supplying suspension to the valve 18 to its suction pipe 5. Inside the tank is installed, the sensor 19, the temperature of the suspension. The tank can also be fitted with upper and lower suspension level, the control unit actuators of valves and actuator pump motor (drawing does not depicted).

The tank has a water gauge glass 20 and the nozzle with a valve 21 for draining wash water from it into the sewer.

The apparatus operates as follows.

the work.

The period of filling of the suspension, such as yeast concentrate begin closing the valves 6, 17, 21, opening valves 14,18 and 11 and the pump 4. While the coolant is supplied to the coil 2, and the warm suspension is in the distributor 3 suspension. It irrigates the top turn of the coil 2 and a continuous film flows consistently to all downstream coils. Thanks to intensive heat transfer in the film and participate in the heat transfer across the surface of the heat exchanger flowing into the tank, the suspension becomes a constant temperature equal or close to the given one. The degree of opening of the valve 14 remains constant and is chosen so that the cooling capacity of the heat exchanger was the maximum, and there was no its icing.

When it reaches the top level of the tank suspension to open the valve 6 and close the valve 18. The period of incubation, during which the suspension is circulated in a closed circuit (tank-pump-dispenser suspension - coil-tank) when a constant level in the tank. When the temperature equal to the lower specified limit (2oC) stop the flow of coolant in the coil by closing the blower adjust is through the vessel wall temperature of the suspension rises and can reach the top of the set value (4oC). In this case, again open the valve 14 and start the pump. The result is a moving and cooling the suspension to the lower predetermined temperature limit. Sampling for analysis of concentration of the suspension is carried out in the periods of circulation.

Discharge temperature-controlled suspension from the reservoir is produced when closed and valves 14, 18, 11, 21, open valves 14, 17 and the pump switched on. At the end of the unloading apparatus is washed with water and a disinfectant when closed and valves 14, 18, 17, 21 and the pump switched on. Wash water is removed from the apparatus by opening the valve 21.

When there is a system for automatic process control all the above operations are performed automatically.

The design of the device ensures uniform cooling of the suspension in its entirety and the intensification of the process of heat transfer due to the creation of the film mode of the suspension flow over the entire surface of the heat exchanger. The latter is rapidly cooled and mixed with its circulation, resulting eliminates stratification of the suspension.

1. Apparatus for temperature control suspension, which is a vertical cylindrical tank equipped with repeat heat exchanger in the form of a coil and is located above the upper level of the suspension, when this tank is equipped with closed circuit circulation of the latter, containing placed above the coil dispenser suspension for irrigation of its coils and pump, the suction nozzle which is connected to the exhaust tube of the suspension from the tank and its discharge nozzle to the dispenser suspension.

2. The apparatus according to p. 1, characterized in that the dispenser suspension is made in the form of a hollow ring with holes and a diameter equal to the diameter of the coil, which is located coaxially with the latter.

3. The apparatus according to p. 1, characterized in that the pipeline supply of coolant is attached to the upper turn of the coil.

 

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3 cl, 3 dwg

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