Application of All Recovery Heat Pump Water Heaters in Industrial Production

Abstract: It is a basic national policy of our country to improve energy efficiency, realize the comprehensive utilization of energy and build a conservation-oriented society. The comprehensive utilization of thermal energy has drawn much attention. The people with lofty ideals have never stopped researching on energy conservation and the heat utilization rate has been continuously raised. All recovery type heat pump water heaters are new achievements in energy-saving technologies and are widely used in all aspects of heat sources and heat utilization .

Keywords: Recycling heat pump hot water unit industrial production application

It is a basic national policy of our country to improve the utilization of energy, realize the comprehensive utilization of energy and build a conservation-oriented society. The comprehensive utilization of thermal energy has drawn much attention. The people with lofty ideals have never stopped researching on energy conservation and the heat utilization rate has been continuously raised. All recovery type heat pump water heaters are new achievements in energy-saving technologies and are widely used in all aspects of heat sources and heat utilization .

All recovery-type heat pump water heater is based on efficient heat exchangers and efficient compressor based on the new energy-saving system to achieve a perfect combination of heating, cooling and domestic hot water machine.

First, the unit working principle:

All recovery type heat pump hot water unit is a semi-enclosed thermal system. The system uses the secondary heat of production (living) sewage and exhaust gas to convert the temperature of the medium (water or other fluids) to recover most of the heat in the sewage and tail gas. The medium consumes a small amount of electric energy through the recovery unit to increase the heat content of the medium , To achieve low heat to high energy conversion, to achieve the production (life) with the temperature of the heat requirements. Through the heat pump cycle to achieve hot, cold, hot water triple supply.

Second, the unit to adapt to the scope and supporting programs:

The unit to adapt to the sewage, exhaust gas above 20 degrees all the waste heat recovery can be implemented occasions and specific processes. Widely used in industrial boilers, hotel baths, printing and dyeing textiles, electricity, food, chemicals, paper and other industries temperature regulation of the process and tail waste heat recovery.

Table 1: various conditions of the equipment package

Serial number Sewage temperature medium equipment for the whole end of the program

1 hot water more than 50 degrees water shower efficient heat exchanger, circulating pump, water tank

2 domestic hot water less than 50 degrees water shower efficient heat exchanger, heat pump, circulating pump, water tank

3 hot water is greater than the outlet temperature process equipment, efficient heat exchangers, circulating pumps, water tanks

4 process water temperature is less than the outlet temperature Process equipment efficient heat exchangers, heat pumps, circulating pumps, water tanks

5 heating greater than 60 degrees water radiator high efficiency heat exchanger, circulating pump, water tank

6 heating less than 60 degrees water radiator efficient heat exchanger, heat pump, circulating pump, water tank

7 Refrigeration Greater than 20 degrees water air-conditioning heat exchangers, refrigeration units, circulating pumps,

8 triple for more than 20 degrees water air conditioner, shower heat exchanger \ refrigeration unit, circulating pump, heat pump, water tank

9 process heat exchange temperature greater than 10 degrees fluid technology equipment efficient heat exchanger

Third, the economic effect analysis:

Sewage 0-100 degrees under atmospheric pressure, the enthalpy difference of 10 degrees per 41.98KJ, per ton of water per 10 degrees equivalent to 1.43 kg of heat equivalent standard coal. Recycling 1 ton of waste heat in 50 degrees of sewage, the value is equal to 10 kilograms of coal.

Table 2: Recovery of one ton of 10-degree temperature difference of sewage and the corresponding energy value comparison

Serial number name equivalent amount of market value of saving value Remarks

1 860 grams of coal 770 yuan / ton (standard coal) 0.67 yuan

2 electric 6.99Kwh 0.65 yuan / Kwh 4.54 yuan

3 oil 580 grams 4.66 yuan / kg 2.70 yuan per liter 0.9kg

4 gas 0.75 square 3.60 yuan / square 2.70 yuan

5 steam 8.99Kg 130.00 yuan / ton 1.17 yuan

Note: The table according to the recovery rate of 60?

Table 3: Typical industrial boiler blowdown heat recovery analysis

Serial number The main parameters Sewage Discharge sewage heat calculation time recovery? Heat recovery equivalent standard coal

1 0. 7Mpa10t / h continuous non-expanding container 0. 348GJ h 85 0.295GJ 10.08kg

2 1. 5Mpa20t / h continuous non-expanding container 0. 962GJ h 85 0.926GJ 32.8kg

3 0. 4Mpa1.0t / h regular 7.24GJ 40 2.89GJ 98.76kg

4 0. 7Mpa1.0t / h Regular 8.36GJ 40 3.34GJ 114.14kg

5 at atmospheric pressure 1.0t irregular discharge 0. 355GJ 40 0.142GJ 4.85kg

Four, Matching Matters Note:

All recovery-type heat pump hot water unit covers a small area, small investment, energy saving, high efficiency, reliable operation to adapt to a wide range of features. The hot links should be full of professional and technical personnel to make the unit to maximize efficiency, so as to avoid secondary waste.

1, sewage (exhaust) composition, temperature, pressure, heat content and emission laws and characteristics.

2, the use of heat recovery and the use of heat, the system convergence program.

3, with the status quo, temperature, pressure, dosage and process requirements.

4, the national energy policy and the requirements of the relevant industry norms.