CN204373118U - The heating and air-conditioning system that thermal power plant electric heat pump and steam-operating heat pump combine - Google Patents

Abstract

The utility model discloses a heating and air-conditioning system combining an electric heat pump and a steam-driven heat pump in a thermal power plant, which solves the problem that the existing heating and air-conditioning system of a high-temperature vapor compression cycle cold water heat pump unit cannot maximize the use of waste heat from the power plant. The high-temperature vapor compression circulating water heat pump unit using the waste heat of the cooling tower and the electric drive compression circulating water heat pump unit are integrated to provide cold and heat sources for the power plant. The high-temperature vapor compression heat pump provides urban central heating and factory heating in the heating season; Drive the compression heat pump to provide cold and hot water for air conditioning in the factory area and heat domestic hot water. At the same time, due to the instability of domestic hot water use, the excess heat can be used to heat the condensate water in the power plant. The cold and heat source integrated system can fully utilize the waste heat when the domestic hot water is not in use. At the same time, various cold and heat source systems in the factory area are reasonably configured in the form of heat pump units according to different heat medium parameters. It is a promising firepower. Integrated cold and heat source for power plants.

Description

Heating and air-conditioning system combining electric heat pump and steam-driven heat pump in thermal power plant

technical field

The utility model relates to a waste heat utilization system of a thermal power plant, in particular to a system for effectively utilizing the waste heat of the power plant by utilizing an electric-driven compression circulating water heat pump unit and a high-temperature vapor compression circulating water heat pump unit of the thermal power plant.

Background technique

At present, the existing high-temperature vapor compression cycle chilled water heat pump heating and air-conditioning system using the waste heat of auxiliary cooling towers in thermal power plants uses the waste heat of auxiliary cooling towers in power plants to provide cold and heat sources for heating, air conditioning, and domestic hot water systems in the plant. In this system, the heat medium parameters of the heating in the factory area and the heating of the air conditioner in the factory area are both 110/70°C, and the reasonable temperature of the hot water supply and return water for air conditioning is 50/45°C. The existing heat medium parameters are not economically reasonable. The fan coil unit at the end of the air conditioner is satisfied. Due to the unstable use of domestic hot water in the plant area, the waste heat of the power plant cannot be utilized to the maximum extent, resulting in insufficient use of waste heat.

Contents of the invention

The utility model provides a heating and air-conditioning system combining an electric heat pump and a steam-driven heat pump in a thermal power plant, which solves the technical problem that the existing high-temperature vapor compression cycle cold water heat pump unit heating and air-conditioning system cannot maximize the use of waste heat from the power plant.

The utility model solves the above technical problems through the following technical solutions:

A heating and air-conditioning system combining an electric heat pump and a steam-driven heat pump in a thermal power plant, including a cooling tower, a high-temperature steam type compression circulating water heat pump unit and an electric drive compression circulating water heat pump unit, the high temperature steam type compression circulating water heat pump unit is provided with a drive The steam input pipe and the drain pipe, the electric drive device is installed on the heat pump unit of the electric drive compressed circulating water, the return pipe of the auxiliary circulating water of the thermal power plant is connected with the main inlet of the first three-way, and the right branch of the first three-way Through a pipeline, it is connected to the water inlet of the auxiliary cooling tower, and the water outlet of the auxiliary cooling tower is connected to the right branch port of the second tee, and the main inlet of the second tee is connected to the auxiliary machine of the thermal power plant. Circulating water supply pipe, the left branch of the first three-way is connected with the main inlet of the third three-way, and the lower branch of the third three-way is connected with the evaporator of the electric drive compression circulating water heat pump unit through a pipeline The water inlet is connected, and the evaporator outlet of the electric drive compression circulating water heat pump unit is connected with the lower branch port of the fourth tee through a pipeline, and the main water inlet of the fourth tee is connected with the left branch of the second tee. The branch port is connected, and the upper branch port of the fourth tee is connected with the evaporator water outlet of the high-temperature steam-type compression circulating water heat pump unit through a pipeline, and the evaporator water inlet of the high-temperature steam-type compression circulating water heat pump unit is connected through a pipeline. The pipeline is connected with the upper branch of the third tee. The water outlet of the condenser of the high-temperature steam type compression circulating water heat pump unit is connected to the urban heating network water supply pipe, and the water inlet of the condenser of the high temperature steam type compression circulating water heat pump unit is It is connected with the return water pipe of the urban heating network, the water outlet of the first condenser of the electric drive compression circulating water heat pump unit is connected with the domestic hot water supply pipe, and the water inlet of the first condenser of the electric drive compression circulation water heat pump unit is connected with the domestic hot water supply pipe. Water return pipe, the water outlet of the second condenser of the electric drive compression circulating water heat pump unit is connected with the cold and hot water supply pipe of the air conditioner, and the water inlet of the second condenser of the electric drive compression circulation water heat pump unit is connected with the cold water return pipe of the air conditioner water pipe.

The return water pipe of the urban heating network is connected in parallel with the heating return pipe of the factory area, and the water supply pipe of the urban heating network is connected in parallel with the heating water supply pipe of the factory area.

The high-temperature vapor compression circulating water heat pump unit using the waste heat of the cooling tower and the electric drive compression circulating water heat pump unit are integrated to provide cold and heat sources for the power plant. The high-temperature vapor compression heat pump provides urban central heating and factory heating in the heating season; Drive the compression heat pump to provide cold and hot water for air conditioning in the factory area and heat domestic hot water. At the same time, due to the instability of domestic hot water use, the excess heat can be used to heat the condensate water in the power plant. The cold and heat source integrated system can fully utilize the waste heat when the domestic hot water is not in use, and at the same time, the various cold and heat source systems in the factory area are rationally configured in the form of heat pump units according to the different heat medium parameters, which is very promising. Integrated cold and heat source for thermal power plants.

The high-temperature vapor compression circulating water heat pump unit utilizing the waste heat of the auxiliary cooling tower and the electric drive compression circulating water heat pump unit are rationally integrated on the basis of realizing the original functions, and solve the problem of hot water temperature during the heating of the factory air conditioner in the original system; at the same time The waste heat of the domestic hot water when not in use is used to heat the condensate water of the power plant throughout the year, which solves the waste of waste heat in the original system when the domestic hot water is not in use. The system of the invention is more reasonable, not only improves the COP value of the heat pump unit, but also improves the waste heat utilization rate of the power plant and saves steam extraction for the power plant.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail:

A heating and air-conditioning system combining an electric heat pump and a steam-driven heat pump in a thermal power plant, including a cooling tower 3, a high-temperature steam-type compression circulating water heat pump unit 11, an electric-driven compression circulating water heat pump unit 7, and a high-temperature steam-type compression circulating water heat pump unit 11 The driving steam input pipe 14 and the drainage pipe 15 are arranged on the top, and the electric driving device 26 is arranged on the electric-driven compression circulating water heat pump unit 7. The auxiliary circulating water return pipe 1 of the thermal power plant communicates with the main entrance of the first tee 2 , the right branch of the first tee 2 communicates with the water inlet of the auxiliary cooling tower 3 through a pipeline, the water outlet of the auxiliary cooling tower 3 communicates with the right branch of the second tee 4, and the second The main entrance of the first three-way 4 is connected with the auxiliary machine circulation water supply pipe 5 of the thermal power plant, the left branch of the first three-way 2 is connected with the main entrance of the third three-way 6, and the third three-way 6 is connected with the main entrance. The lower branch port communicates with the evaporator water inlet 8 of the electric drive compression circulating water heat pump unit 7 through a pipeline, and the evaporator water outlet 9 of the electric drive compression circulation water heat pump unit 7 communicates with the fourth tee through a pipeline. The lower branch port of 10 is connected, the main water inlet of the fourth three-way 10 is connected with the left branch port of the second three-way 4, and the upper branch port of the fourth three-way 10 is connected to the high-temperature steam type compression through a pipeline. The evaporator water outlet 13 of the circulating water heat pump unit 11 is connected,

The evaporator water inlet 12 of the high-temperature steam type compression circulating water heat pump unit 11 is connected with the upper branch of the third tee 6 through a pipeline, and the condenser water outlet 16 of the high temperature steam type compression circulating water heat pump unit 11 is connected to There is an urban heating network water supply pipe 18, and the condenser water inlet 17 of the high-temperature steam type compressed circulating water heat pump unit 11 is connected with an urban heating network return water pipe 19,

A domestic hot water supply pipe 27 is connected to the first condenser water outlet 22 of the electrically driven compression circulating water heat pump unit 7, and a domestic hot water return pipe is connected to the first condenser water inlet 23 of the electrically driven compressed circulating water heat pump unit 7. 28. The water outlet 24 of the second condenser of the electric-driven compression circulating water heat pump unit 7 is connected to the cold and hot water supply pipe 29 of the air conditioner, and the water inlet 25 of the second condenser of the electric-driven compression circulating water heat pump unit 7 is connected to the water supply pipe 29 of the air conditioner. Hot water return pipe 30.

On the return pipe 19 of the urban heating network, there is a factory area heating return pipe 21 in parallel, and on the urban heating network water supply pipe 18, a factory area heating water supply pipe 20 is connected in parallel.

The high-temperature steam compression circulating water heat pump unit is driven by 0.6Mpa-0.8Mpa steam to extract the waste heat of the cooling tower (reduce the circulating water at 25°C to 20°C) and reduce the temperature of the return water of the urban heating network and the heating return water of the factory area from 60 ℃ raised to 120 ℃, for urban central heating and factory heating. The COP of the high-temperature vapor compression circulating water heat pump unit is ≥5.5.

The electric-driven compressed circulating water heat pump unit is driven by 380V/50Hz electric energy. It provides 7/12°C chilled water for air-conditioning users during the cooling season. 50°C; during the heating season, extract waste heat from the cooling tower to provide 45/50°C hot water for air-conditioning users, and at the same time heat domestic hot water into the water storage tank for use by users; extract waste heat from the cooling tower to heat the 10°C living room during the non-cooling and heating season Hot water to 50°C. Due to the unstable use of domestic hot water throughout the year, the remaining heat will be used to heat the condensate water in the power plant. The COP of the electric drive compression cycle cold water heat pump unit is ≥6.

Claims (2)

1. the heating and air-conditioning system of a thermal power plant electric heat pump and the combination of steam-operating heat pump, comprise cooling tower (3), high-temperature steam type compression cycle hydro-thermal pump assembly (11) and electric driven compression circulating water heating pump assembly (7), high-temperature steam type compression cycle hydro-thermal pump assembly (11) is provided with and drives steam input pipe (14) and drain pipe (15), electric driven compression circulating water heating pump assembly (7) is provided with electric driver (26), it is characterized in that, thermal power plant subsidiary engine recirculated water return pipe (1) is communicated with the main-inlet of first threeway (2), the right branch mouth of first threeway (2) is communicated with by the water inlet of pipeline with subsidiary engine cooling tower (3), the delivery port of subsidiary engine cooling tower (3) is communicated with the right branch mouth of second threeway (4), the main-inlet of second threeway (4) is connected with thermal power plant subsidiary engine recirculated water feed pipe (5), the left branch mouth of first threeway (2) is communicated with the main-inlet of the 3rd threeway (6), the inferior division mouth of the 3rd threeway (6) is communicated with the evaporimeter water inlet (8) of electric driven compression circulating water heating pump assembly (7) by pipeline, the evaporimeter delivery port (9) of electric driven compression circulating water heating pump assembly (7) is communicated with by the inferior division mouth of pipeline with the 4th threeway (10), the main water inlet of the 4th threeway (10) is communicated with the left branch mouth of second threeway (4), top set's mouth of the 4th threeway (10) is communicated with the evaporimeter delivery port (13) of high-temperature steam type compression cycle hydro-thermal pump assembly (11) by pipeline, the evaporimeter water inlet (12) of high-temperature steam type compression cycle hydro-thermal pump assembly (11) is communicated with by top set's mouth of pipeline with the 3rd threeway (6), the leaving condenser water mouth (16) of high-temperature steam type compression cycle hydro-thermal pump assembly (11) is connected with municipal heating systems feed pipe (18), the condenser water inlet (17) of high-temperature steam type compression cycle hydro-thermal pump assembly (11) is connected with municipal heating systems return pipe (19), first leaving condenser water mouth (22) of electric driven compression circulating water heating pump assembly (7) is connected with domestic hot-water's feed pipe (27), first condenser water inlet (23) of electric driven compression circulating water heating pump assembly (7) is connected with domestic hot-water's return pipe (28), second leaving condenser water mouth (24) of electric driven compression circulating water heating pump assembly (7) is connected with air conditioner cold and hot water feed pipe (29), second condenser water inlet (25) of electric driven compression circulating water heating pump assembly (7) is connected with air conditioner cold and hot water return pipe (30).

2. the heating and air-conditioning system of a kind of thermal power plant electric heat pump according to claim 1 and the combination of steam-operating heat pump, it is characterized in that, municipal heating systems return pipe (19) is parallel with plant area's heating return pipe (21), municipal heating systems feed pipe (18) is parallel with plant area's heating feed pipe (20).