CN103398414A - Industrial cooling water waste heat recycling system - Google Patents

Abstract

An industrial cooling water waste heat recycling system solves the problem that waste heat in industrial production is not utilized fully and wasted. The industrial cooling water waste heat recycling system comprises heat source equipment (8), a cooling tower (1), a primary side water pump (9) and a heat exchanger (3), and is technically characterized in that the cooling tower (1) is connected with the heat source equipment (8) and the primary side of the heat exchanger (3), the primary side water pump (9) is connected with the heat source equipment (8) and the primary side of the heat exchanger (3), the secondary side of the heat exchanger (3) is connected with a secondary side water pump (4) and a water source heat pump (5), and a heating circulating pump (6) is connected with heating equipment (7) and the water source heat pump (5). The industrial cooling water waste heat recycling system has the advantages of skillful structural design, high heat recycling rate, energy conservation, environmental protection, low improvement cost and the like.

Description

Industrial cooling water waste heat recovery and utilization system

technical field

The invention relates to a waste heat recovery and utilization system, in particular to an industrial cooling water waste heat recovery and utilization system.

Background technique

In industrial production, such as: metallurgical industry, chemical industry, pharmaceutical industry, papermaking, beer, tobacco, etc., cooling towers are usually used to cool equipment or workpieces. However, due to the low temperature of the cooling water after heat exchange in the cooling tower, it cannot be used for heating in winter, but the heat energy of the cooling water is dissipated to the atmosphere through the cooling tower, resulting in a large amount of waste of heat energy. Therefore, it is urgent to improve the existing industrial cooling water waste heat recovery and utilization system.

Contents of the invention

The object of the present invention is to provide an industrial cooling water waste heat recovery and utilization system, which solves the problem of waste heat not being fully utilized in industrial production. It has the advantages of ingenious structural design, high heat recovery rate, energy saving and environmental protection, and low renovation cost.

The technical scheme adopted in the present invention is: including heat source equipment, cooling tower, primary side water pump, heat exchanger, and its technical points are: the water outlet end of the cooling tower is connected with the return water end of the heat source equipment, and the water outlet end of the heat source equipment It is connected to the return water end of the primary side water pump, the water outlet end of the primary side water pump is connected to the return water end of the primary side of the heat exchanger, and the water outlet end of the primary side of the heat exchanger is connected to the return water end of the cooling tower; the secondary side of the heat exchanger The water outlet on the secondary side is connected to the return water of the secondary side water pump, the water outlet of the secondary side water pump is connected to the return water of the secondary side of the water source heat pump, the water outlet of the secondary side of the water source heat pump is connected to the secondary side of the heat exchanger The water return end is connected; the water outlet end of the water source heat pump heating end is connected with the return water end of the heating circulation pump, the water outlet end of the heating circulation pump is connected with the return water end of the heating equipment, and the water outlet end of the heating equipment is connected with the water return end of the water source heat pump .

The inlet and outlet of the primary side water pump and the secondary side water pump are provided with electric valves for controlling flow bypass.

A sub-catchment is provided between the heating circulation pump and the heating equipment.

The advantages and positive technical effects of the present invention are: recovering the waste heat from industrial cooling water and using it for winter heating of industrial plants, office buildings, and residences, as well as water for daily life, reducing heating costs, saving energy and reducing emissions, and ensuring sufficient energy. use. The primary water pump is used to deliver circulating water between the heat source equipment and the heat exchanger. Send (or discharge) hot circulating water to the heat exchanger. The secondary water pump is used to deliver circulating water between the heat exchanger and the water source heat pump. Electric valves for controlling the flow bypass are installed at the inlet and outlet of the primary and secondary side pumps to play the role of flow bypass. The heat exchanger is used to displace the heat of industrial cooling water, and at the same time ensure that the cooling water entering the recycling system does not mix with other water sources, so as to ensure the normal production. The sub-catchment ensures the balance of heating water in each area. The water source heat pump uses the Carnot reverse cycle to achieve temperature rise. The heat exchange efficiency is high, and the COP value can reach 4-6. In addition, the present invention also has the advantages of simple installation, stable operation, low maintenance cost, short payback period, quick profit and the like.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a front view structural schematic diagram of the present invention.

Description of serial numbers in the figure: 1 cooling tower, 2 electric valve, 3 heat exchanger, 4 secondary side water pump, 5 water source heat pump, 6 heating circulation pump, 7 heating equipment, 8 heat source equipment, 9 primary side water pump.

Detailed ways

The specific structure of the present invention will be described in detail according to FIG. 1 . The industrial cooling water waste heat recovery system includes heat source equipment 8 , cooling tower 1 , primary side water pump 9 , heat exchanger 3 and other parts. The water outlet end of the cooling tower 1 is connected to the return water end of the heat source equipment 8, the water outlet end of the heat source equipment 8 is connected to the return water end of the primary side water pump 9, and the water outlet end of the primary side water pump 9 is connected to the return water of the primary side of the heat exchanger 3 The water outlet end of the primary side of the heat exchanger 3 is connected with the return water end of the cooling tower 1. Install control valves on the inlets and outlets of primary and secondary side water pumps and heating circulation pumps 9, 4, and 6. The inlet and outlet of the primary and secondary side water pumps 9 and 4 are provided with electric valves 2 for controlling flow bypass. The water outlet end of the secondary side of the heat exchanger 3 is connected to the water return end of the secondary side water pump 4, the water outlet end of the secondary side water pump 4 is connected to the water return end of the secondary side of the water source heat pump 5, and the water outlet end of the water source heat pump 5 secondary side The water outlet end is connected with the return water end of the secondary side of the heat exchanger 3 . The water outlet end of the heating end of the water source heat pump 5 is connected to the return water end of the heating circulation pump 6 , the water outlet end of the heating circulation pump 6 is connected to the return water end of the heating equipment 7 , the water outlet end of the heating equipment 7 is connected to the return water end of the water source heat pump 5 connected. A sub-catchment is provided between the heating circulation pump 6 and the heating equipment 7 . There are also maintenance valves, thermometers, pressure gauges and other equipment on the corresponding pipelines. Wherein, the primary side water pump 9 does not need to be modified, and the original cooling water circulation pump can be directly used. The cooling tower 4 can be selected for use as a cooling tower for industrial cooling, or as a cooling tower for water-cooled air-conditioning units. The heating equipment 7 is mainly composed of fan coil units, radiators, geothermal heat, air conditioners and other parts. The heat exchanger 3 can be a plate heat exchanger (such as a wide flow channel plate heat exchanger), a shell and tube heat exchanger, and the like.

Working principle: The circulating water for cooling of the cooling tower 1 is sent to the heat source equipment 8 that needs to be cooled through the valve switch, and then the circulating water is sent to the primary side of the heat exchanger 3 and the secondary side of the heat exchanger 3 through the primary side water pump 9 side heat exchange. The circulating water after heat exchange enters the water source heat pump 5 through the secondary side water pump 4, and the water source heat pump 5 raises the low temperature circulating water from the secondary side of the heat exchanger 3 to above 50°C through the Carnot reverse cycle, and then pumps it into the heating circulation pump 6 , the heating circulating pump 6 pumps the higher temperature hot circulating water into the sub-catchment, and finally sends it to the heating equipment 7, so as to achieve the purpose of using industrial waste heat for heating. A temperature sensor is arranged on the fan of the cooling tower 1 to realize automatic control of the fan. When the whole waste heat recovery and utilization system is in operation, the normal supply of cooling water in the cooling tower 1 must be ensured first, and then the heating circulation pump 6 can be started.

The present invention is not limited to the above-mentioned embodiments, and any equivalent ideas or changes within the technical scope disclosed in the present invention are listed in the protection scope of the invention.

Claims (3)

1. industrial colling waste heat recycling system, comprise heat resource equipment (8), cooling tower (1), primary side water pump (9), heat exchanger (3), it is characterized in that: the water side of described cooling tower (1) is connected with the backwater end of heat resource equipment (8), the water side of heat resource equipment (8) is connected with the backwater end of primary side water pump (9), the water side of primary side water pump (9) is connected with the backwater end of heat exchanger (3) primary side, and the water side of heat exchanger (3) primary side is connected with the backwater end of cooling tower (1); The water side of heat exchanger (3) secondary side is connected with the backwater end of secondary side water pump (4), the water side of secondary side water pump (4) is connected with the backwater end of water resource heat pump (5) secondary side, and the water side of water resource heat pump (5) secondary side is connected with the backwater end of heat exchanger (3) secondary side; The water side of water resource heat pump (5) heat supply end is connected with the backwater end of heating circulating pump (6), and the water side of heating circulating pump (6) is connected with the backwater end of heating equipment (7), and the water side of heating equipment (7) is connected with the backwater end of water resource heat pump (5).

2. industrial colling waste heat recycling system according to claim 1, it is characterized in that: the import and export of described primary side water pump (9), secondary side water pump (4) is provided with the motor-driven valve (2) be used to controlling flow bypass.

3. industrial colling waste heat recycling system according to claim 1, is characterized in that: between described heating circulating pump (6) and heating equipment (7), be provided with water collecting and diversifying device.

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