Search

CN-121993928-A - Water source heat pump energy station with wide temperature range and step heat supply function and use method

CN121993928ACN 121993928 ACN121993928 ACN 121993928ACN-121993928-A

Abstract

The invention relates to the technical field of water source heat pump energy stations, in particular to a water source heat pump energy station with wide temperature range and step heat supply and a use method thereof, comprising a first circulation group, a second circulation group and a second circulation group, wherein the first circulation group is used for circulating a lake water source; the third circulation group is communicated with the second circulation group to form a closed circulation, natural low-temperature heat sources such as a lake water source and a river water source are ingeniously utilized to recycle waste heat through a screw high-temperature water source heat pump unit, so that energy consumption is greatly reduced, running cost is effectively reduced, a new economic and efficient heat supply way is provided for industrial thermal scenes, and a power-assisted enterprise achieves the dual purposes of energy conservation, emission reduction, cost reduction and efficiency improvement.

Inventors

  • HUANG MING
  • CHEN JIE
  • SU BIN

Assignees

  • 江苏嘉盛环境设备制造有限公司

Dates

Publication Date
20260508
Application Date
20260401

Claims (9)

  1. 1.A wide temperature range step heating water source heat pump energy station, comprising: a first circulation group (1) for circulating a lake water source; The second circulation group (2) is in heat exchange connection with the first circulation group (1) through a first plate heat exchanger (6); A third circulation group (3) communicated with the second circulation group (2) to form a closed circulation; the fourth circulating group (4) is communicated with the third circulating group (3), and the fourth circulating group (4) and the third circulating group (3) form heat exchange connection through a plurality of groups of second plate heat exchangers (61); a fifth circulation group (5) which is in heat exchange connection with the fourth circulation group (4) through a plurality of groups of second plate heat exchangers (61) and is used for producing high-temperature hot water with different temperatures; The fifth circulation group (5) comprises a plurality of groups of high-temperature heat pump units (51), wherein the plurality of groups of high-temperature heat pump units (51) are communicated with an external circulation pipe (52) and a connection circulation pipe (53), the connection circulation pipe (53) is mutually connected with a plurality of groups of second plate heat exchangers (61), the external circulation pipe (52) is connected with external equipment, and R134a refrigerant, R515B/R1234ze refrigerant, R245fa refrigerant and R1233zd refrigerant are respectively arranged in the plurality of groups of high-temperature heat pump units (51).
  2. 2. A wide temperature area step heating water source heat pump energy station according to claim 1, wherein the first cycle group (1) comprises: The circulating system comprises a first circulating pipe (11), wherein a water inlet (12) is formed in one end of the first circulating pipe (11), a water outlet (13) is formed in the other end of the first circulating pipe, a plurality of groups of water taking pumps (16) and a plurality of groups of cyclone sand removers (14) are arranged on a conveying path of the first circulating pipe (11), and the first plate type heat exchanger (6) is arranged on the conveying path of the first circulating pipe (11).
  3. 3. A wide temperature range step heating water source heat pump energy station as claimed in claim 2, wherein a grid (15) is arranged on the water inlet (12).
  4. 4. A wide temperature area step heating water source heat pump energy station according to claim 1, wherein the second cycle group (2) comprises: The device comprises a first screw heat pump host (21) and a second screw heat pump host (22), wherein the evaporation side ports of the first screw heat pump host (21) and the second screw heat pump host (22) are communicated with a second circulating pipe (23), and the condensation side ports of the first screw heat pump host (21) and the second screw heat pump host (22) are communicated with a third circulating pipe (33); the conveying path of the second circulating pipe (23) is provided with a first plate heat exchanger (6) so that the second circulating pipe (23) and the first circulating pipe (11) can exchange heat, and the conveying path of the second circulating pipe (23) is also provided with a plurality of groups of cold water pumps (24).
  5. 5. A wide temperature area step heating water source heat pump energy station according to claim 1, wherein the third cycle group (3) comprises: The water separator (31) and the water collector (32), wherein the water separator (31) and the water collector (32) are communicated with a third circulating pipe (33), a bypass pipe (39) is communicated with a conveying path of the third circulating pipe (33), and a closed constant-pressure tank (35), a plurality of groups of water supplementing pumps (36) and a water supplementing tank (37) are arranged on the bypass pipe (39); an electric boiler (38) and a plurality of groups of hot water pumps (34) are also arranged on the conveying path of the third circulating pipe (33).
  6. 6. A wide temperature area step heating water source heat pump energy station according to claim 1, wherein the fourth cycle group (4) comprises: The water separator (31) and the water collector (32) which are shared by the third circulation group (3) are communicated with the domestic hot water discharge pipe (43) on the water separator (31), a plurality of groups of water outlet pipes (41) are also communicated with the water separator (31), a plurality of groups of water return pipes (42) are communicated with the water collector (32), and a plurality of groups of water outlet pipes (41) and a plurality of groups of water return pipes (42) are both connected with the second plate heat exchanger (61).
  7. 7. The wide-temperature-range step-heating water source heat pump energy station as claimed in claim 5, wherein the third circulating pipe (33) is provided with a buffer unit, the buffer unit comprises a spiral coil pipe (71), a buffer tank (7) and a bubble separator (72), the buffer unit is arranged on a conveying path of the third circulating pipe (33), and the buffer tank (7) is provided with a dosing port (73).
  8. 8. The wide temperature range step heating water source heat pump energy station as set forth in claim 7, further comprising a water quality sensor (74) disposed on the conveying path of the third circulating pipe (33) for detecting water quality.
  9. 9. The application method of the wide-temperature-range cascade heat supply water source heat pump energy station is characterized by comprising the following steps of: S1, after lake water enters a first circulating pipe (11), a plurality of groups of water taking pumps (16) are started to pump and convey the lake water, and in the conveying process, a plurality of groups of cyclone sand removers (14) remove sand from the lake water to remove fine particles such as sediment in the lake water, so that the cleanliness of the lake water entering a first plate heat exchanger (6) is ensured; S2, conveying the treated lake water to a first plate heat exchanger (6) through a first circulating pipe (11), and performing heat exchange with the fluid in the second circulating group (2), wherein at the moment, a plurality of groups of cold water pumps (24) in the second circulating group (2) are started to convey the fluid in the second circulating pipe (23) to the first plate heat exchanger (6), so that the heat in the lake water is absorbed, and the temperature of the fluid is increased; The heated fluid enters the evaporation sides of the first screw heat pump host (21) and the second screw heat pump host (22), the fluid releases heat in the heat pump host, so that the refrigerant in the heat pump host evaporates and absorbs heat, the evaporated refrigerant enters the condensation side and exchanges heat with the fluid in the third circulating pipe (33), and the heat is transferred to the fluid in the third circulating pipe (33) to raise the temperature of the fluid; S3, a water separator (31) and a water collector (32) in the third circulation group (3) form closed circulation through a third circulation pipe (33), and the heated fluid is conveyed into the water separator (31) by starting a plurality of groups of hot water pumps (34) on the third circulation pipe (33) and then distributed to different branches according to requirements; S4, the fourth circulation group (4) and the third circulation group (3) share a water separator (31) and a water collector (32), part of hot water in the water separator (31) is directly supplied with domestic hot water through a domestic hot water discharge pipe (43), so that the demands of daily washing, bathing and the like are met, a plurality of groups of water outlet pipes (41) on the water separator (31) convey the hot water to a plurality of groups of second plate heat exchangers (61), heat exchange is carried out on the hot water and backwater in the fourth circulation group (4), and heat supply with different temperature demands is realized through multistage heat exchange of the plurality of groups of second plate heat exchangers (61); S5, a plurality of groups of high-temperature heat pump units (51) in the fifth circulation group (5) are started, a connecting circulating pipe (53) is connected with a plurality of groups of second plate heat exchangers (61), heat of fluid in the second plate heat exchangers (61) is absorbed, R134a refrigerant, R515B/R1234ze refrigerant, R245fa refrigerant and R1233zd refrigerant are respectively arranged in the different high-temperature heat pump units (51), the refrigerants have different physical characteristics and working temperature ranges, the proper high-temperature heat pump units (51) can be selected to operate according to the temperature requirements of actual production of high-temperature hot water, and the high-temperature hot water heated by the high-temperature heat pump units (51) is connected with external equipment through an external circulating pipe (52) to provide high-temperature hot water for industrial production, regional heating and the like.

Description

Water source heat pump energy station with wide temperature range and step heat supply function and use method Technical Field The invention relates to the technical field of water source heat pump energy stations, in particular to a wide-temperature-range step-heating water source heat pump energy station and a use method thereof. Background In the current large background of industrial development and energy utilization, the heating system of the industrial site has a crucial influence on energy consumption and running cost. At present, the heating mode of industrial sites is still mainly a traditional mode, wherein a gas boiler and an electric boiler are relatively common heat source providing equipment. However, these conventional heating methods have a number of significant drawbacks: From the viewpoint of energy consumption, gas boilers and electric boilers need to consume a large amount of fossil energy or electric energy during operation. The gas boiler takes natural gas and the like as fuel, a large amount of non-renewable resources can be consumed in the combustion process, and due to the limitation of combustion efficiency, part of energy can be dissipated in a waste heat form, so that the energy utilization rate is low, and in the aspect of operation cost, the high energy consumption of the gas boiler and the electric boiler directly causes high operation cost; In terms of meeting the high-temperature heat consumption requirement, when some equipment in an industrial place, such as a coating machine, a rotary dehumidifier and the like, needs a high-temperature heat source above 80 ℃, the traditional heat pump host is not attractive when meeting the requirement, the single heat pump host is limited by the working principle and technology when preparing the high-temperature heat source, the compression ratio of the compressor is increased along with the increase of the heat generation temperature, the loss of the refrigerant in the circulation process is increased, the energy efficiency of the heat pump is greatly reduced, the cost for preparing the high-temperature heat source is increased, and the sufficient high-temperature heat is difficult to stably provide, so that the continuous and stable requirement of industrial production on the high-temperature heat source cannot be met. In addition, the requirements of different heat utilization areas and equipment in the industrial places on the quality of the heat source are different, different equipment needs heat sources with different temperatures according to the process characteristics and the operation requirements, and the temperature span of the heat source is larger. For example, some production processes may only require a low temperature heat source of 40-50 ℃ for preheating materials, while other processes require a high temperature heat source of 80-100 ℃ for drying and other operations, however, most of the existing heating systems have a single temperature output mode, and flexible adjustment and supply in a wide temperature range are difficult to achieve. Therefore, the invention provides a water source heat pump energy station with wide temperature range and step heat supply to solve the problems. Disclosure of Invention (One) solving the technical problems The invention provides a water source heat pump energy station with wide temperature range and step heat supply, and aims to solve the problems in the background technology. (II) technical scheme The water source heat pump energy station comprises a first circulation group, a second circulation group, a third circulation group, a fourth circulation group and a fifth circulation group, wherein the first circulation group is used for circulating a lake water source, the second circulation group is in heat exchange connection with the first circulation group through a first plate heat exchanger, the third circulation group is communicated with the second circulation group to form closed circulation, the fourth circulation group is communicated with the third circulation group, heat exchange connection is formed between the fourth circulation group and the third circulation group through a plurality of groups of second plate heat exchangers, the fifth circulation group is in heat exchange connection with the fourth circulation group through a plurality of groups of second plate heat exchangers and is used for producing high-temperature hot water with different temperatures, the fifth circulation group comprises a plurality of groups of high-temperature heat pump units, the plurality of groups of high-temperature heat pump units are communicated with an external circulation pipe and a connection circulation pipe, the connection is mutually connected with a plurality of groups of second plate heat exchangers, and R134a refrigerant, R245 a refrigerant, R1234ze, R3 zfa refrigerant and R245 d refrigerant are respectively arranged in the plurality of groups of high-temperature heat pump u