Industrial hot and cold water system solutions

Content Details

Industrial cold and hot water systems include low temperature water for food processing and high temperature water, low temperature cooling water and low temperature carrier cold water solution in the production field. According to the solution description of common low-temperature cold water systems such as dairy products and beer, and hot water systems in industrial applications:

It includes refrigeration source, heat source, heat exchange equipment, conveying equipment, evaporation or cooling equipment.

1、 Cooling plan for dairy, beer and other food production:


Take dairy products as an example:

Raw material acceptance → milk purification → cooling → standardization → preheating → homogenization → sterilization → cooling → canning → capping → refrigeration → inspection → delivery. ← Disinfection ← Disinfection ← Empty bottle liquid milk recovery process, HACCP stipulates that cooling is the key control point. In order to prevent aerobic spores from breeding in milk after heat treatment, it is necessary to rapidly cool the milk to 4~6 ℃ to meet the requirements of high temperature sterilization, nutrition, health, safety and long shelf life. Ice water at 1 ℃ is used to cool the liquid milk to 4 ℃ through the plate heat exchanger, which meets the requirements of HACCP in the food industry.

Cooling process:

1. Ammonia liquid separator and vertical evaporator or horizontal evaporator can only produce ice water at 4 ℃. If you want to cool the milk to 4 ℃, you must add ice cubes to the ice water to lower the temperature. In this way, the ice making equipment is increased, the investment is increased, and the operation is not convenient, the water temperature is not easy to control, and the system is not energy-saving.

2. The brine unit can be used to produce brine below 0 ℃. Salt water pollutes food and does not meet the requirements of HACCP certification in the food industry. Moreover, this device has low heat exchange efficiency, low evaporation temperature (- 5~- 6 ℃), high operation cost and no energy saving.

3. The modular ice water device can be used to produce+1 ~+2 ℃ ice water near the freezing point temperature of water, which can control the precise outlet water temperature; It conforms to the requirements of HACCP in the food industry and has no pollution to food; The device automatically controls the water outlet, which is accurate, reliable, efficient, energy-saving, light and environment-friendly. The device operates stably and has been approved by more than 50 users; The device is equipped with an anti freezing system to ensure that the device does not freeze.

The first and second schemes have low heat exchange efficiency, large floor area, and can not accurately control the water temperature. They do not meet the requirements of HACCP and cannot be used in the cooling process of liquid milk. The third option is recommended. Features of this scheme:

1. Ice water can be prepared at a temperature of+1~+2 ℃ higher than the freezing point of the medium.

2. It can realize heat exchange with large temperature drop of cooling medium, and the temperature drop can reach 30 ℃.

3. Heat transfer with small temperature difference, the temperature difference is as low as 2 ℃, energy saving and high efficiency.

4. The system is automatically controlled. The running state can be dynamically simulated by computer and the parameters can be recorded automatically.

5. Frequency conversion control is adopted for ice water transmission.

6. The evaporator is made of stainless steel, which meets the requirements of HACCP in the food industry.

7. The structure is simple, compact and occupies a small area.

8. High heat exchange efficiency, stable operation, safe and reliable, simple maintenance.

9. The control precision is high, and the precision can reach ± 0 5 ℃, the outlet water temperature can be controlled to be close to the freezing point.

10. It can realize automatic control, environmental protection and energy conservation.

11. Save investment and operation costs;

Composition of refrigeration system:

◎ Compressor type: piston type, screw type.

◎ Refrigerant working medium: R717, R22.

◎ Cooling mode: air cooling, water cooling, evaporation type.

◎ Evaporation form: air cooler, plate heat exchanger, shell and tube heat exchanger, coil.

◎ System: direct cooling, indirect cooling and sectional cooling.

◎ Liquid supply mode: pump liquid supply, direct liquid supply and gravity liquid supply.

◎ Full automatic control, manual control and semi-automatic control.

2、 Heating scheme for food, chemical and other production:

1. The temperature range (10-25 ° C) adopts the process of mixing ice water and cooling water.

2. The temperature range (25-100 ° C) adopts boiler (atmospheric hot water boiler can be selected) and heat exchanger for exchange, and when the temperature is above 80 ° C, electric heating scheme shall be used.

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