DD145319A1 - DEVICE FOR COOLING AND USE WASTEWATER PREPARATION - Google Patents

Description

Field of application of the invention

The invention relates to a device which is used both for cooling and by using the condenser heat for use hot water in Milchviehanlagen MilchdurchflußkUhlung.

Characteristics of the known technical solutions It is the milk storage cooling and Milchdurchflußkühlung known, both types of cooling are not technically comparable. While milk storage refrigeration is used for smaller dairy cattle farms up to about 400 animal shelters according to TGL 26565 (draft), in dairy cattle farms with larger animal occupations the resulting body warm milk is cooled to about + 4 ° C by milk flow cooling / The benefits of milk flow cooling are the short cooling time of the milk , a relatively small required cooling capacity and low investment costs. In the hitherto known technical solutions of Milchdurchflußkühlung ice water is generated by a refrigeration system with air or water-cooled condenser, which cools the resulting milk in countercurrent by means of heat exchangers. The heat of the condenser is delivered directly to the ambient air or, through cooling water by means of a recooling system to the environment. Partly, a pre-cooling of the milk is provided by means of cold water, the existing technical solution does not allow optimal energy use. The heated water is discharged to the environment unused. The domestic hot water needed in the dairies is generated by the respective boiler house by combustion of solid, liquid or gaseous fuels and fed via pipelines to the consumers.

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Object of the invention

The aim of the invention is, with the least possible amount of electrical energy required anyway for Milchdurchflußkühlung to secure the necessary cooling demand by a cold-heat-coupling and on the other hand to produce the entire use of hot water demand of dairy cattle.

Such a solution makes it possible to reduce the primary energy demand of dairy cattle plants and save operating costs. This optimizes the energy-economic behavior.

Explanation of the essence of the invention

The object of the invention is to cool the discontinuous accumulating milk by means of flow cooling and to use the existing heat energy sur generating hot water use in dairy cattle systems through a cold-heat coupling, thereby reducing the use of primary energy and operating costs. According to the invention, this is achieved by arranging a pressure accumulator with a double function in "a water circuit which at the same time stores cold and use hot water in a non-subdivided container possible.

Furthermore, the discontinuous milk flow present within a milking period is converted into a continuous process by arranging an adjusted milk pump between pre-stacking container and combined heat exchanger, in cooperation with the milk pre-stacking container. This procedure is necessary for optimal pre-cooling and main cooling.

In order to optimize the refrigeration system, it is necessary to operate both at the same time and with a time delay to milk flow.

To ensure a stable operation of the refrigeration system, even in the absence of preheating the cold water, a mixture of use hot water to cold water through the two-way control valve with the temperature-controlled! Regulator required.

embodiment

The invention will be explained with reference to a cooling process in dairy cattle FIG.

The refrigeration system 1 for generating the ice water 16 and the use hot water 17 consists of the compressor 2, the condenser 3, the expansion valve 4 and the evaporator. 5

The water circuit 7,17 is described in the flow direction. The / / asser 7 enters the cold zone of a pressure accumulator 8 at a low temperature and thereafter flows into the combined heat exchanger at the same temperature. In the pre-cooling section 10, the vessel is preferably preheated countercurrently with the body-warm milk 12 in an indirect way reaches the condenser 3, In this, the water 7 is brought by receiving the condenser heat to the final temperature and flows as use of hot water to the warm area of the pressure accumulator 8. From this it is supplied to the consumer 11. When an extraction of use hot water 17 from the pressure accumulator 8, the same volume of water 7 flows after /

The technological treatment of milk 12 is realized as follows?

The milk 12 is conveyed body warm from the milking system to a level-controlled pre-stacking container 13. By pre-stacking 13, the discontinuous process is converted into a continuous milk flow, thus achieving optimum use of the pre-cooling section 10.

From the pre-stacking container 13, the milk flows 12 to the combi. Neten heat exchanger 9 and is pre-cooled by water 7 in the Vorkühlabteilung.

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Thereafter, the milk 12 enters the main cooling department 14 aes combined heat exchanger 9 and is cooled in countercurrent with ice water 16 to the final temperature and fed to the storage container 15, from which the removal of the milk 12 takes place.

The main cooling of the milk 12 is carried out by ice water 16, which is generated by the refrigeration system 1 in the ice water basin 6 and the Hauptküiilabteilung 14 of the combined heat exchanger 9 is supplied. In countercurrent, the milk 12 is cooled to storage temperature, the ice water 16 is heated and returned to the ice water basin 6. In order to achieve an optimization of the operation of the refrigeration system 1, an operation is provided both at the same time and shifted in time to milk flow.

With temporally shifted operation of the milk flow is interrupted. As a result, the preheating of the cold water 7 in the pre-cooling department 10 is eliminated. To ensure a stable operation of the refrigeration system and to reach the final temperature of the use-warm,.

Water 17 is an admixture of use hot water 17 via the two-way control valve 18 is necessary. The two-way control valve 18 receives its pulse vora temperature-controlled controller 19th

 In the accumulator 8 is a stratification of Nutzswarmwassers 17 erreichen.Hierbei is a Entnahm.von hot water 17 by the consumer 11 when generating Warnings 17 during simultaneous or time-shifted operation of the refrigeration system for Milchfluß.und interruption of Nutzwarmwasserzeugung depending on the Nutzswarmwasservolumen in Accumulator 8 possible.

Claims (1)

invention claim Point 1 Device for cooling milk and for use warm water preparation, in which the milk is cooled by means of flow cooling, characterized in that the refrigeration system (1) a water circuit (7) (17) consisting of pressure accumulator (8) as use warm water and cold water storage, consisting of a non-subdivided container, pre-cooling section (S) (IO), two-way control valve (18), temperature-controlled controller (19), water pump (20) and the condenser (3) of the refrigeration system (1), wherein the water circuit (7) the milk circuit (12), consisting of Vorstapelbehälter (15), breast pump (22), combined heat exchanger (9) (10) (14) and storage container (15) for main cooling of the milk circuit (20) of the ice water circuit (16) consisting of ice water basin (6), ice water pump (21), main cooling section (9) (14) is associated and the elements of the respective circuits are connected by pipe system, wherein the water circuit (7) (17), milk circuit (12) and ice water circuit (16) with each other indirectly in connection stand. Point 2 Device according to point 1, characterized in that the cold region of the pressure accumulator (8) of the precooling department (10) of the combined heat exchanger (9) is connected upstream. point 3 Device according to item 1, characterized in that the cold water integrations. (7) are provided in the lower region and for the use of hot water (17) in the upper region of the pressure accumulator (8). Point 4 Apparatus according to item 1 and 3, characterized in that the supply of the water (7) to the pre-cooling section (10) preferably from the deepest area and the removal of the use hot water (17) preferably from the highest region of the pressure accumulator (8). point 5 YprrlcJitung according to item 1, characterized in that the number of memories is variable, preferably arranged vertically and connected in parallel. Point δ Device according to item 1, characterized in that between. a milk pump (22) is arranged upstream of the pre-stacking container (13) and the pre-cooling section (10), taking into account the discontinuous milk inflow (12) within the maximum and minimum switching points of the level-controlled pre-stacking container (13) Milk flow (12) is adjusted. Point 7. , Device according to item 1, characterized in that the 'water pump (20) and the two-way control valve (18) which receives its gmpuls by the temperature-controlled regulator (19) _s to the condenser (3) in the flow direction is preferably arranged upstream. For this iS ©! T®