CN114111109A - Cold and hot dual-heat-supply pump system of mine air return source and operation method - Google Patents
Cold and hot dual-heat-supply pump system of mine air return source and operation method Download PDFInfo
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- CN114111109A CN114111109A CN202111424875.0A CN202111424875A CN114111109A CN 114111109 A CN114111109 A CN 114111109A CN 202111424875 A CN202111424875 A CN 202111424875A CN 114111109 A CN114111109 A CN 114111109A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
Abstract
The invention discloses a cold and hot dual-supply heat pump system of a mine return air source and an operation method, aiming at solving the problem that heating, cooling and bathing can not be realized simultaneously, wherein the heat pump system connects a cold and hot integrated heat pump unit, a mine return air heat energy extraction device and an auxiliary cold and hot source, and then realizes the functions of heating in winter and cooling in summer by combining an electric control device; the bathing heating heat pump unit is connected with other components to realize the annual bathroom hot water supply. The auxiliary cold and heat source comprises a cooling tower and an electric boiler, the cooling tower is connected with the mine return air heat energy extraction device in parallel, the electric boiler is connected with the cold and heat integrated heat pump unit in parallel, and the auxiliary cold and heat source is started when the return air cold/heat taking does not meet the load target. The heat pump system provided by the invention can simultaneously meet the requirements of heating and cooling in winter and summer in a mining area and hot water supply in bathing life all year round, can realize multiple purposes of one machine, can be used for mines with cooling and heating requirements at the same time, fully recycles return air heat energy resources, and promotes the implementation of energy conservation and emission reduction in the coal industry.
Description
Technical Field
The invention belongs to the field of heat pump systems, and relates to a mine return air source cold and hot dual-supply heat pump system and an operation method.
Background
Along with the increasing of the energy conservation and emission reduction strength, the utilization of mine waste heat resources is gradually promoted. The air volume of the return air of the mine is stable, and the temperature and the humidity are basically not influenced by the outdoor atmospheric temperature and season change, so in recent years, the waste heat of the return air of the mine is mostly used as a site heat source for supplying heat for the mine. Mine heating air conditioning requirements include building heating, cooling, shaft freeze protection and year-round bathing hot water. Research finds that the prior art of the mine needs two sets of systems of heating and air conditioning to meet the requirement of workers in winter and summer on production and living comfort.
In the prior art of mines, two major systems of heating and air conditioning are needed to meet the production and living demands in winter and summer, and the process relates to the problems of energy consumption and initial investment of each system.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a cold and hot dual heat supply pump system of a mine return air source and an operation method thereof, and aims to solve the technical problem that a mine cannot simultaneously meet the requirements of heating, cooling and bathing in one set of system in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention provides a cold and hot dual-supply heat pump system of a mine return air source, which comprises a mine return air heat energy extraction device, a water source heat pump unit, an auxiliary cold and hot source, a water separator and a water collector, wherein the mine return air heat energy extraction device is connected with the water source heat pump unit;
the mine return air heat energy extraction device comprises a diffusion tower; the inlet of the diffusion tower is connected with a return air shaft, the inner wall of the diffusion tower forms a return air duct, and mine return air is delivered to an air outlet at the top of the diffusion tower through the return air duct; the top of the diffusion tower is provided with a heat exchange device, and the heat exchange device is connected with a water source heat pump unit; the bottom of the heat exchange device is provided with a water collecting device, and the outlet of the water collecting device is provided with a primary side circulating water pump which is connected with the water source heat pump unit and used for conveying circulating water;
the water source heat pump unit comprises a cold-hot integrated heat pump unit and a bath heating heat pump unit; the input port of the cold and hot integrated heat pump unit is connected with the output port of the primary side circulating water pump, the output port of the cold and hot integrated heat pump unit is provided with a secondary side circulating water pump, and the output port of the cold and hot integrated heat pump unit is connected with the water separator and used for heating/cooling a user; the input port of the bathing heating heat pump unit is connected with the output port of the primary side circulating water pump, the output port of the bathing heating heat pump unit is provided with a bathing circulating water pump, and the output port of the bathing heating heat pump unit is used for providing bathing water for a user;
the auxiliary cold and heat source comprises a cooling tower and an electric boiler, the cooling tower is used as an auxiliary cold source and connected with the mine return air heat energy extraction device in parallel, in summer, the outlet end of the cooling tower is connected with the outlet of the water collecting device in parallel, the cooling tower is connected with the input end of the water source heat pump unit through the water collecting device, and the output port of the cold and heat integrated heat pump unit is connected with the input port of the cooling tower and used for supplying cold water to the water collecting device; the electric boiler is used as an auxiliary heat source and is connected with the cold and hot integrated heat pump unit in parallel; the water collector is connected with the water separator and is used for inputting heated/cooled water into the cold-hot integrated heat pump unit; in winter, the input port of the electric boiler is connected with the output port of the water collector, and the output port of the cold-hot integrated heat pump unit and the output port of the electric boiler are both connected with the water separator and used for supplying hot water to users.
Preferably, the cold and hot integrated heat pump unit and the bath heating heat pump unit respectively comprise two shell-and-tube heat exchangers, and each shell-and-tube heat exchanger comprises an evaporator and a condenser and is used for realizing heat exchange among mine return air heat-taking water supply and return, mine heating, shaft water supply and return and bath water supply and return; the refrigeration working medium in the shell-and-tube heat exchanger is connected through two refrigerant pipelines, and a compressor and an expansion valve are respectively arranged on the two refrigerant pipelines;
connecting an output port of the primary side circulating water pump with an evaporator of the cold and hot integrated heat pump unit, and connecting a condenser of the cold and hot integrated heat pump unit with a water separator for realizing heating; connecting an output port of the primary side circulating water pump with a condenser of the cold and hot integrated heat pump unit, and connecting an evaporator of the cold and hot integrated heat pump unit with a water separator for realizing cold supply; the output port of the primary side circulating water pump is connected with an evaporator of the bathing heating heat pump unit, and the output port of a condenser of the bathing heating heat pump unit is used for providing bathing water for a user.
Preferably, the heat exchange device comprises a return air heat exchanger and a water spraying device, the return air heat exchanger is arranged at the top of the diffusion tower, the water spraying device is arranged at the top of the return air heat exchanger, and the water spraying device is connected with the water source heat pump unit;
the water collecting device comprises a water collecting tank, a water collecting tank and water treatment equipment, wherein the water collecting tank is arranged at the bottom of the return air heat exchanger, the water collecting tank is arranged below the water collecting tank, the water collecting tank is connected with the water collecting tank, the water treatment equipment is arranged at an outlet of the water collecting tank, an inlet of the water treatment equipment is connected with an outlet of the water collecting tank, and the water treatment equipment is connected with the primary side circulating water pump.
Preferably, the system also comprises an electric control device, wherein the electric control device comprises a temperature sensor, a pressure sensor, a liquid level sensor and a PLC (programmable logic controller);
the temperature sensor and the pressure sensor are arranged on the water separator and the water collector and are used for monitoring the temperature and the pressure of secondary side supply and return water; the liquid level sensor is positioned in the water collecting tank and used for monitoring the liquid level in the water collecting tank; the input port of the PLC controller is respectively connected with the temperature sensor, the pressure sensor and the liquid level sensor, and the output port of the PLC controller is respectively connected with the cold-hot integrated heat pump unit and the bathing heating heat pump unit.
Preferably, the air return duct is provided with a main fan;
the water collecting tank, the water collecting tank and the water treatment equipment are all connected through pipelines.
Preferably, a valve X is arranged at an inlet of the electric boiler, a valve IX is arranged at an outlet of the electric boiler, a valve X is arranged at an inlet of the cooling tower, a valve IX is arranged at an outlet of the cooling tower, a valve V and a valve I are arranged on a secondary side water return pipeline from the water collector to the cold-hot integrated heat pump unit, a valve II and a valve VI are arranged on a primary side water supply pipeline from the primary side circulating water pump to the cold-hot integrated heat pump unit, a valve V and a valve I are arranged on a secondary side water supply pipeline from the cold-hot integrated heat pump unit to the water separator, and a valve II and a valve VI are arranged on a primary side water return pipeline from the cold-hot integrated heat pump unit;
in winter, opening the valve I, the valve II, the valve III and the valve IV, and closing the valve V, the valve VI, the valve VII and the valve VIII; and opening the valve IX and the valve X when extreme cold weather occurs, and starting the electric boiler.
Preferably, in summer, opening the valve V, the valve VI, the valve VII and the valve VIII, and closing the valve I, the valve II, the valve III and the valve IV; and opening a valve XI and a valve XII when extreme hot weather occurs, and starting the cooling tower.
Preferably, in the transition season, the valve V, the valve I, the valve II, the valve VI, the valve VII, the valve III, the valve IV, the valve VIII, the valve XI, the valve XII, the valve IX and the valve X are closed, and only the bathing heating heat pump unit is started for providing bathing hot water.
Preferably, the cold and hot integrated heat pump unit and the bath heating heat pump unit are at least 1;
the number of cooling towers is determined according to the requirement.
The invention also provides an operation method of the mine return air source cold and hot dual-supply heat pump system, which comprises the following steps:
mine return air flows into the diffusion tower through a return air shaft, and circulating water generated after the mine return air flows into the heat exchange device through a return air channel formed by the diffusion tower to exchange heat flows into the water collecting device and then is pumped into the heat pump unit through primary side circulating water;
in winter, an input port of the cold-hot integrated heat pump unit is connected with an output port of the primary side circulating water pump, circulating water is led into the cold-hot integrated heat pump unit, and the circulating water is led into the water separator after heat exchange is completed to supply heat for users;
in summer, an input port of the cold-hot integrated heat pump unit is connected with an output port of the primary side circulating water pump, circulating water is led into the cold-hot integrated heat pump unit, and the circulating water is led into a water separator after cold exchange is completed to supply cold for a user;
when the water heater is extremely hot, the input port of the cold-hot integrated heat pump unit is connected with the output port of the primary side circulating water pump, the output port of the cold-hot integrated heat pump unit is connected with the water separator to supply cold for a user, and the output port of the cold-hot integrated heat pump unit is connected with the input port of the cooling tower to supply cold water for the water collecting device;
when the water heater is extremely cold, the input port of the cold-hot integrated heat pump unit is connected with the output port of the primary side circulating water pump, the input port of the electric boiler is connected with the output port of the water collector, and the output ports of the cold-hot integrated heat pump unit and the electric boiler are connected with the water separator to supply heat for users;
when bathing, the input port of the bathing heating heat pump unit is connected with the output port of the primary side circulating water pump, and the output port of the bathing heating heat pump unit provides bathing water for users.
Compared with the prior art, the invention has the following beneficial effects:
according to the mine return air source cold and hot double-supply heat pump system, the diffusion tower is arranged on the return air shaft, the inner wall of the diffusion tower forms the return air duct, mine return air flows into the heat exchange device through the return air duct to exchange heat, circulating water formed after the mine return air flows into the heat exchange device through the return air duct is guided into the input port of the cold and hot integrated heat pump unit through the water collection device under the action of the primary side circulating water pump, and the treated circulating water is guided into the water separator under the action of the cold and hot integrated heat pump unit and the secondary side circulating water pump to supply heat/cold for users; under the action of a primary side circulating water pump, water of the water collecting device is led into an input port of a bathing heating heat pump unit, and under the action of the bathing heating heat pump unit and a bathing circulating water pump, heated water is led into a user input port to provide bathing water for a user; in summer, under the working condition: the outlet of the water collecting device is connected with a cooling tower in parallel, the output port of the cold and hot integrated heat pump unit is connected with the input port of the cooling tower to supply cold water for the water collecting device, the water of the water collecting device is led into the input port of the cold and hot integrated heat pump unit under the action of the primary side circulating water pump, and the treated circulating water is led into the water separator under the action of the cold and hot integrated heat pump unit to supply cold for a user under the extremely hot condition; under the working condition in winter: the electric boiler is connected with the cold and hot integrated heat pump unit in parallel, an input port of the electric boiler is connected with an output port of the water collecting device to supply water for the electric boiler, and the treated circulating water is guided into the water separator under the action of the cold and hot integrated heat pump unit and the electric boiler to supply heat for users under the extremely cold condition. The cooling tower is connected with the mine return air heat energy extraction device in parallel, the electric boiler is connected with the cold and hot integrated heat pump unit in parallel, and the cooling tower is started when the return air cold/heat does not meet the load target. The invention adopts auxiliary cold and heat sources as relatively constant-temperature mine return air to provide a large amount of low-temperature heat sources for the heat pump unit, and the auxiliary cold and heat sources of the cooling tower and the electric boiler are arranged to meet the peak demand of cold and heat utilization. The heat exchange process is completed by adopting the low energy consumption of the water source heat pump unit, the mine return air heat energy extraction device and the water source heat pump unit are combined into a set of water source heat pump system, and the cold-hot integrated heat pump unit is used for bearing the indoor heating and shaft anti-freezing of the mine building in winter and bearing the indoor cooling of the building in summer; the bathing and heating heat pump unit is responsible for supplying hot water to bathrooms in a mining area all the year round, so that heating in winter is realized, and heating and cooling are simultaneously realized in summer, so that one set of heat pump system has multiple purposes.
Furthermore, the main fan is arranged in the air return duct, so that the return air of the mine can be quickly sent into the air return duct, and the heat exchange efficiency can be accelerated.
Furthermore, a compressor in the water source heat pump unit does not need a reversing valve to adjust the evaporation and condensation purposes of the two shell-and-tube heat exchangers; the valve is responsible for starting, stopping and maintaining the equipment, and the refrigeration and heating working conditions are converted by opening and closing the valve on the secondary side water supply and return parallel pipeline; the valve V, the valve I, the valve II, the valve VI, the valve VII, the valve III, the valve IV and the valve VIII are used for realizing system season conversion; the valve XI and the valve XII are valves for controlling the auxiliary cold source of the cooling tower; the valve IX and the valve X are valves for controlling the auxiliary heat source of the electric boiler.
Furthermore, the PLC receives the field real-time data sensed by the temperature sensor and the liquid level sensor, issues an instruction to regulate and control the operation conditions of a frequency converter of a circulating water pump motor and a heat pump unit, realizes intelligent management and control of a heat pump system, and completes the function as required with high quality.
The operation method of the mine return air source cold and hot dual-supply heat pump system provided by the invention has the advantages that the water circulation operation is realized through the mine return air heat energy extraction device, the heat/cold exchange operation is realized through the water source heat pump unit, and the supplement effect on the refrigeration/heating effect of the water source heat pump unit in extreme weather is realized through the auxiliary cold and hot source.
Drawings
FIG. 1 is a schematic view of the working principle of a cold and hot dual-supply heat pump system of a mine return air source of the invention;
FIG. 2 is a schematic view of the working principle of the cold and hot dual heat supply pump system of the mine return air source in winter according to the present invention;
FIG. 3 is a schematic diagram of the working principle of the cold and hot dual heat supply pump system of the mine return air source in summer;
fig. 4 is a schematic diagram of the intelligent management and control principle of the mine return air source cold and hot dual-supply heat pump system.
Wherein: 1-a cold and hot integrated heat pump unit; 2-a bathing heating heat pump unit; 3-a diffusion tower; 4-return air heat exchanger; 5-air return duct; 6, collecting water tank; 7-a water collecting tank; 8-a main fan; 9-a water spraying device; 10-water treatment equipment; 11-primary side circulating water pump; 12-a cooling tower; 13-an electric boiler; 14-an evaporator; 15-a condenser; 16-a compressor; 17-an expansion valve; 18-valve V; 19-valve I; 20-valve II; 21-valve VI; 22-valve VII; 23-valve III; 24-valve IV; 25-valve VIII; 26-valve XI; 27-valve XII; 28-valve IX; 29-valve X; 30-a temperature sensor; 31-a pressure sensor; 32-a liquid level sensor; 33-a bathing circulating water pump; and 34-secondary side circulating water pump.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the mine return air source cold and hot dual-pump heat pump system provided by the invention comprises a water source heat pump unit, a mine return air heat energy extraction device, an auxiliary cold and hot source, a water separator and a water collector.
The mine return air heat energy extraction device is connected with the water source heat pump unit, and the auxiliary heat source is arranged between the mine return air heat energy extraction device and the water source heat pump unit; the cooling tower is connected with the mine return air heat energy extraction device in parallel, the electric boiler is connected with the cold and hot integrated heat pump unit in parallel,
the mine return air heat energy extraction device is used for realizing water circulation operation; the water source heat pump unit is used for realizing heat/cold exchange operation; and the auxiliary cold and heat source is used for supplementing refrigeration/heating of the water source heat pump unit.
The water source heat pump unit comprises a cold-hot integrated heat pump unit 1 and a bath heating heat pump unit 2, the cold-hot integrated heat pump unit 1 and the bath heating heat pump unit 2 can be formed by connecting 1 or more than 1 heat pump units in parallel, and fig. 1 illustrates that the two heat pump units are connected in parallel.
The heat pump unit 1 and the bath heating heat pump unit 2 respectively comprise two shell-and-tube heat exchangers, a compressor 16 and an expansion valve 17, wherein the shell-and-tube heat exchangers are an evaporator 14 and a condenser 15 and are used for realizing heat exchange between return air heat-taking water supply and return water and heat exchange between mine heating, shaft anti-freezing water supply and return water and bath water supply and return water. The refrigeration working medium in the shell-and-tube heat exchanger is connected through two refrigerant pipelines, and a compressor 16 and an expansion valve 17 are respectively arranged on the two refrigerant pipelines; the shell and tube heat exchanger comprises two heat exchange pipelines which are respectively connected with the primary side and the secondary side. The primary side is provided with a mine return air heat exchanger 4 and a cooling tower 12, and the cold-hot integrated heat pump unit 1 and the bathing heating heat pump unit 2 exchange heat with heat in mine return air and heat generated by the cooling tower 12; the secondary side is connected with the water separator and the water collector, and the tail ends of the secondary side are connected with the water separator and the water collector, and the secondary side is used for bathing heat. The tail ends comprise heat/cold for construction, heat for well bore freeze prevention, cold for underground heat hazard treatment and the like. The cold and hot integrated heat pump unit 1 is connected with the water separator and the water collector, secondary side circulating water generated by heat exchange of the cold and hot integrated heat pump unit 1 is heated/cooled by the water separator to each terminal hot/cold equipment, and the secondary side circulating water is connected to the cold and hot integrated heat pump unit 1 by the water collector after heat exchange/cooling is completed.
The mine return air heat energy extraction device comprises a diffusion tower 3, a return air duct 5, a heat exchange device, a water collecting device and a main fan machine 8, wherein the heat exchange device comprises a return air heat exchanger 4 and a water spraying device 9, and the water collecting device comprises a water collecting tank 6, a water collecting tank 7 and water treatment equipment 10. The inlet of the diffusion tower 3 is connected with a return air shaft of a mine, the inner wall of the diffusion tower 3 forms a return air duct 5, a main fan 8 is installed on the return air duct 5, and mine return air is sent to an air outlet at the top of the diffusion tower 3 along the return air duct 5; a return air heat exchanger 4 is installed at the top of the diffusion tower 3, a water collecting tank 6 is arranged at the bottom of the return air heat exchanger 4, a water collecting tank 7 is installed below the water collecting tank 6, and the water collecting tank 7 is connected with the water collecting tank 6 through a pipeline; and a water spraying device 9 is arranged at the top of the return air heat exchanger 4, and the input end of the water spraying device 9 is connected with the heat pump unit through a pipeline. A water treatment device 10 and a primary-side circulating water pump 11 at an outlet of the water collection tank 7, and the water treatment device 10 and the primary-side circulating water pump 11 are connected to the water collection tank 7 through pipes. The water treatment equipment 10 is used for purifying circulating water of the water collecting tank 7 and the cooling tower 12; the primary side circulating water pump 11 is used for conveying purified circulating water to the cold and hot integrated heat pump unit 1 and the bathing and heating heat pump unit 2.
The heat/cold side circulating water is heated/cooled by a return air heat exchanger 4 at the top of a diffusion tower 3, then sequentially passes through a water collecting tank 6, a water collecting tank 7 and a water treatment device 10, works by a primary side circulating water pump 11 to send the circulating water into a water source heat pump unit, and is conveyed into the return air heat exchanger 4 or a cooling tower 12 for heat/cold exchange after heat/cold exchange.
The auxiliary cold and heat sources, including the cooling tower 12 and the electric boiler 13, are turned on when the return air cooling/heating does not meet the load target. Under the refrigeration working condition: the cooling tower 12 is used as an auxiliary cold source and connected with the mine return air heat energy extraction device in parallel, the outlet end of the cooling tower 12 is connected with the outlet of the water collecting tank 7 in parallel, the pipeline is sent to the water treatment device 10, the inlet end of the cooling tower 12 is connected with the output end of the pipeline of the condenser 14 of the heat pump unit through a circulating water return pipe, and circulating water returns to the cooling tower 12 and the return air heat exchanger 4 for reuse after heat exchange by the heat pump unit. Under the heating working condition: the electric boiler 13 is connected in parallel with the cold and hot integrated heat pump unit 1 as an auxiliary heat source, the electric boiler 13 and the cold and hot integrated heat pump unit 1 supply heat for the tail ends in extreme cold, and each tail end comprises heat for buildings, heat for shaft anti-freezing and the like.
The inlet and outlet of the water collecting tank 7, the inlet and outlet of the cooling tower 12, the pipeline at the input end of the water spraying device 9 of the return air heat exchanger 4, the inlet and outlet of the water treatment equipment 10 and the electric boiler 13, and the inlet and outlet pipelines of the cold-hot integrated heat pump unit 1 and the bathing and heating heat pump unit 2 are all provided with valves which are responsible for starting, stopping and overhauling the equipment. The refrigeration and heating working conditions are converted by opening and closing of the valve on the secondary side water supply and return parallel pipeline.
Compared with outdoor air, the mine return air temperature and humidity are higher in winter, and a large amount of low-temperature heat energy is stored. On the contrary, the temperature and humidity of the return air of the mine in summer are lower than that of the outdoor air, so that a large amount of heat energy can be absorbed. The invention can be used for providing heat or cold for users in winter and summer and providing bathing domestic water all year round. The working process of the cold and hot double heat pump system of the mine return air source comprises water circulation and heat exchange. The water circulation process mainly takes place at mine return air heat recovery unit, and the heat exchange process mainly takes place in water source heat pump set, and the cold and hot two heat supply pump system's of mine return air source concrete working process as follows:
and (3) a water circulation process of a heat taking/cold side: the inlet of the diffusion tower 3 is connected with a return air shaft of a mine, the mine return air reaches a return air heat exchanger 4 arranged at the top of the diffusion tower 3 through a return air duct 5 by a main fan 8, when the mine return air passes through a water spray chamber in the return air heat exchanger 4, the mine return air and water spray sprayed by a spraying device 9 perform gas-water heat exchange, and the mine return air after heat exchange is discharged through an air outlet. The mine return air absorbs the heat of the water mist in the water spraying device 9 in the return air heat exchanger 4 in summer, and the heat of the mine return air is absorbed by the water mist in the water spraying device 9 in the return air heat exchanger 4 in winter. The circulating water after heat exchange falls into the water collecting tank 6 and then is collected into the water collecting tank 7. Circulating water in the water collecting tank 7 is filtered by the water treatment equipment 10 and then is sent into the water source heat pump unit by the primary side circulating water pump 11 for heat exchange/cold exchange, and the circulating water after heat exchange/cold exchange is sent into the return air heat exchanger 4 or the cooling tower 12 again through the circulating water return pipe for heat/cold exchange.
The import of electric boiler 13 is provided with valve X29, the export of electric boiler 13 is provided with valve IX28, the import of cooling tower 12 is provided with valve X27, the export of cooling tower 12 is provided with valve IX26, be provided with valve V18 and valve I19 on the water collector to the secondary side wet return of cold and hot integral type heat pump set 1, be provided with valve II20 and valve VI21 on primary side water supply line to cold and hot integral type heat pump set 1, be provided with valve V22 and valve I23 on the secondary side water supply line of cold and hot integral type heat pump set 1 to the water knockout drum, be provided with valve II24 and valve VI25 on the primary side wet return of cold and hot integral type heat pump set 1.
In winter, the system can meet two requirements of heating and bathing at the same time. In fig. 1, the valves I19, II20, III 23, IV 24 are open, and the valves V18, VI21, VII22, VIII25 are closed. When extreme weather is encountered, the electric boiler 13 is turned on, i.e. the valve IX28 and the valve X29 are opened.
The heat exchange process in winter, i.e. under heating conditions, is shown in fig. 2: the primary side circulating water is purified by the water treatment device 10 and then enters the evaporator 14 in the cold and hot integrated heat pump unit 1, the circulating water is subjected to isobaric evaporation with a low-temperature low-pressure liquid refrigerant in the evaporator 14 to complete heat exchange, a low-temperature low-pressure gaseous refrigerant is compressed by the compressor 16 to be subjected to adiabatic compression and then is changed into a high-temperature high-pressure gaseous refrigerant to enter the condenser 15, the high-temperature high-pressure gaseous refrigerant is subjected to isobaric condensation in the condenser 15 to release heat to secondary side circulating water, and the refrigerant is changed into a low-temperature low-pressure liquid working medium to return to the evaporator 14 through the expansion valve 17 to perform work and continuously exchange heat with the primary side circulating water entering the evaporator 14 in a circulating manner. The secondary side circulating water obtained by condensation and heat release in the condenser 15 passes through a water supply pipeline, and is sent to the water separator by a secondary side circulating water pump 34 arranged at the output port of the condenser 15 of the cold-hot integrated heat pump unit 1, hot water is sent to the tail end of each building user and a wellhead anti-freezing heat supply source by the water separator, the secondary side circulating water is returned to the cold-hot integrated heat pump unit 1 by the water collector through a water return pipeline after heat exchange is completed, and the circulation is repeated.
In summer, the system meets two requirements of refrigeration and bathing at the same time. In fig. 1, the valves V18, VI21, VII22 and VIII25 are open, and the valves I19, II20, III 23 and IV 24 are closed. When extreme weather is met, the cooling tower 12 is started, namely the valve XI 26 and the valve XII 27 are opened, and the opening number of the cooling tower 12 is determined according to specific conditions.
In summer, i.e. under the refrigeration working condition, the heat exchange process is as shown in fig. 3: the primary side circulating water is purified by the water treatment device 10 and then enters the condenser 15 in the cold and hot integrated heat pump unit 1, the circulating water is subjected to isobaric condensation with a high-temperature high-pressure gaseous refrigerant in the condenser 15 to complete heat exchange, the high-temperature high-pressure liquid refrigerant is changed into a low-temperature low-pressure liquid refrigerant after being applied work by the expansion valve 17 and enters the evaporator 14, the low-temperature low-pressure liquid refrigerant in the shell is subjected to isobaric evaporation in the evaporator 14 to absorb heat of the secondary side high-temperature circulating water, and the gaseous refrigerant is extracted by the compressor 16 and compressed into a high-temperature high-pressure gaseous working medium to return to the condenser 15 to continuously exchange heat with the primary side circulating water entering the condenser 15 in a circulating manner. The low-temperature secondary side circulating water obtained by the evaporator 14 through evaporation and heat absorption passes through a water supply pipeline, and is sent to a water separator by a secondary side circulating water pump 34 arranged at an output port of the evaporator 14 of the cold and hot integrated heat pump unit 1, hot water is sent to the tail end of each air conditioning system user by the water separator to provide cold energy, and the secondary side circulating water is returned to the cold and hot integrated heat pump unit 1 by a water collector through a water return pipeline after heat exchange is completed, so that the circulation is repeated.
In the transition season, only the bath heating heat pump unit 2 is opened, and in fig. 1, the valve V18, the valve I19, the valve II20, the valve VI21, the valve VII22, the valve III 23, the valve IV 24, the valve VIII25, the valve XI 26, the valve XII 27, the valve IX28 and the valve X29 are all closed, so that the bath heating heat pump unit 2 provides bath hot water.
In the transition season, the mine area has no heating and refrigerating requirements, and only the bathing heating heat pump unit 2 needs to be started. The operation mode of the bathing heat pump unit 2 is the same as the operation mode in winter, the circulating water on the primary side enters an evaporator 14 in the bathing heat pump unit 2 after being purified by the water treatment device 10, the circulating water is subjected to isobaric evaporation with the low-temperature low-pressure liquid refrigerant in the evaporator 14 to complete heat exchange, the low-temperature low-pressure gaseous refrigerant is compressed by a compressor 16 to be subjected to adiabatic compression and then is changed into high-temperature high-pressure gaseous refrigerant to enter a condenser 15, the high-temperature high-pressure gaseous refrigerant is subjected to isobaric condensation in the condenser 15 to release heat to the circulating water on the secondary side, and the refrigerant is changed into low-temperature low-pressure liquid working medium to return to the evaporator 14 through an expansion valve 17 to perform work and continuously exchange heat with the circulating water on the primary side entering the evaporator 14. The secondary side circulating water obtained by condensation and heat release in the condenser 15 is supplied to a bathing user for providing a heat source through a bathing circulating water pump 33 arranged at an output port of the bathing heating heat pump unit 2, and after heat exchange is completed, the secondary side circulating water is connected back to the bathing heating heat pump unit 2 through a water return pipeline, and the circulation is repeated.
As shown in fig. 4, which is a schematic diagram of an intelligent management and control principle, the mine return air source cold and hot dual-supply heat pump system provided by the invention is additionally provided with an electric control device, which comprises a temperature sensor 30, a pressure sensor 31, a liquid level sensor 32 and a PLC controller, wherein the temperature sensor 30 and the pressure sensor 31 are both positioned on a water separator and a water collector, and the temperature sensor 30 and the pressure sensor 31 are used for monitoring the temperature and pressure parameters of secondary side supply and return water; a liquid level sensor 32 is arranged in the water collecting tank 7, and the liquid level sensor 32 is used for monitoring the liquid level in the water collecting tank 7. The pressure sensor 31, the temperature sensor 30 and the liquid level sensor 32 respectively convert the acquired pressure signal, temperature signal and liquid level signal into electric signals and transmit the electric signals to the PLC; the recorded motor speed signals of the primary side water circulating pump 11 and the secondary side water circulating pump 34 are converted into electric signals by the frequency converters of the motors in the primary side water circulating pump 11 and the secondary side water circulating pump 34, and the electric signals are transmitted to the PLC. Monitored data are transmitted to the PLC through a cloud network, and the PLC controls the opening of the valve at the inlet and the outlet of the water collecting tank 7 so as to control the water level of the water collecting tank 7. The PLC controller controls the operation of the cold-hot integrated heat pump unit 1 and the bathing heating heat pump unit 2 to ensure that the water supply temperature and the water supply flow are within a set range, and the management and control integration of the whole system is realized.
The invention provides an operation method of a cold and hot dual-supply heat pump system of a mine return air source, which comprises the following steps:
mine return air flows into a diffusion tower 3 through a return air shaft, and circulating water generated after the mine return air flows into a heat exchange device through a return air duct 5 formed by the diffusion tower 3 to exchange heat flows into a water collecting device and then is sent into a heat pump unit through a primary side circulating water pump 11;
in winter, an input port of an evaporator 14 of the cold and hot integrated heat pump unit 1 is connected with an output port of the primary side circulating water pump 11, circulating water is led into the cold and hot integrated heat pump unit 1, an output port of a condenser 15 of the cold and hot integrated heat pump unit 1 is connected with a water separator, and heating of a user is achieved after heat exchange is completed;
in summer, an input port of a condenser of the cold and hot integrated heat pump unit 1 is connected with an output port of the primary side circulating water pump 11, circulating water is led into the cold and hot integrated heat pump unit 1, an output port of an evaporator 14 of the cold and hot integrated heat pump unit 1 is connected with a water separator, and cooling of a user is achieved after heat exchange is completed;
when the mine return air heat energy extraction device is extremely hot, the cooling tower 12 is connected with the mine return air heat energy extraction device in parallel, the condenser output port of the cold and hot integrated heat pump unit 1 is connected into the input ports of the return air heat exchanger and the cooling tower through the circulating water return pipe so that circulating water enters the return air heat exchanger and the cooling tower again for heat exchange, the condenser input port of the cold and hot integrated heat pump unit 1 is connected with the output port of the primary side circulating water pump 11, and the evaporator output port of the cold and hot integrated heat pump unit 1 is connected with the water separator for cooling of a user.
When the temperature is extremely low, the cold-hot integrated heat pump unit 1 and the electric boiler 13 are connected in parallel to supply heat to a user side, the input port of the electric boiler 13 is connected with the output port of the water collector, and the output port of the cold-hot integrated heat pump unit 1 and the output port of the electric boiler 13 are connected with the water separator to supply heat to the user; an evaporator input port of the cold and hot integrated heat pump unit 1 is connected with an output port of the primary side circulating water pump 11;
when bathing, the input port of the evaporator of the bathing heating heat pump unit 2 is connected with the output port of the primary side circulating water pump 11, and the output port of the condenser of the bathing heating heat pump unit 2 provides bathing water for users.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A cold and hot dual-supply heat pump system of a mine return air source is characterized by comprising a mine return air heat energy extraction device, a water source heat pump unit, an auxiliary cold and hot source, a water separator and a water collector;
the mine return air heat energy extraction device comprises a diffusion tower (3); the inlet of the diffusion tower (3) is connected with a return air shaft, the inner wall of the diffusion tower (3) forms a return air duct (5), and mine return air is delivered to an air outlet at the top of the diffusion tower (3) through the return air duct (5); a heat exchange device is arranged at the top of the diffusion tower (3), and the heat exchange device is connected with a water source heat pump unit; the bottom of the heat exchange device is provided with a water collecting device, the outlet of the water collecting device is provided with a primary side circulating water pump (11), and the primary side circulating water pump (11) is connected with a water source heat pump unit and used for conveying circulating water;
the water source heat pump unit comprises a cold-hot integrated heat pump unit (1) and a bathing heating heat pump unit (2); an input port of the cold and hot integrated heat pump unit (1) is connected with an output port of the primary side circulating water pump (11), a secondary side circulating water pump (34) is installed at the output port of the cold and hot integrated heat pump unit (1), and the output port of the cold and hot integrated heat pump unit (1) is connected with a water separator and used for heating/cooling a user; an input port of the bathing heating heat pump unit (2) is connected with an output port of the primary side circulating water pump (11), a bathing circulating water pump (33) is installed at the output port of the bathing heating heat pump unit (2), and the output port of the bathing heating heat pump unit (2) is used for providing bathing water for a user;
the auxiliary cold and heat source comprises a cooling tower (12) and an electric boiler (13), the cooling tower (12) is used as an auxiliary cold source and connected with the mine return air heat energy extraction device in parallel, in summer, the outlet end of the cooling tower (12) is connected with the outlet of the water collecting device in parallel, the cooling tower (12) is connected with the input end of the water source heat pump unit through the water collecting device, and the output port of the cold and heat integrated heat pump unit (1) is connected with the input port of the cooling tower (12) and used for supplying cold water to the water collecting device; the electric boiler (13) is used as an auxiliary heat source and is connected in parallel with the cold and hot integrated heat pump unit (1); the water collector is connected with the water separator and is used for inputting heated/cooled water into the cold-hot integrated heat pump unit (1); in winter, the input port of the electric boiler (13) is connected with the output port of the water collector, and the output port of the cold-hot integrated heat pump unit (1) and the output port of the electric boiler (13) are both connected with the water separator and used for supplying hot water for users.
2. The mine return air source cold and hot dual-supply heat pump system according to claim 1, wherein the cold and hot integrated heat pump unit (1) and the bath heating heat pump unit (2) respectively comprise two shell-and-tube heat exchangers, and the shell-and-tube heat exchangers comprise an evaporator (14) and a condenser (15) and are used for realizing heat exchange among mine return air heat-taking water supply and return, mine heating, shaft water supply and return and bath water supply and return; the refrigeration working medium in the shell-and-tube heat exchanger is connected through two refrigerant pipelines, and a compressor (16) and an expansion valve (17) are respectively arranged on the two refrigerant pipelines;
an output port of the primary side circulating water pump (11) is connected with an evaporator (14) of the cold and hot integrated heat pump unit (1), and a condenser (15) of the cold and hot integrated heat pump unit (1) is connected with a water separator for realizing heating; an output port of the primary side circulating water pump (11) is connected with a condenser (15) of the cold and hot integrated heat pump unit (1), and an evaporator (14) of the cold and hot integrated heat pump unit (1) is connected with a water separator for realizing cold supply; an output port of the primary side circulating water pump (11) is connected with an evaporator (14) of the bathing heating heat pump unit (2), and an output port of a condenser (15) of the bathing heating heat pump unit (2) is used for providing bathing water for a user.
3. The mine return air source cold and hot dual-supply heat pump system according to claim 1, wherein the heat exchange device comprises a return air heat exchanger (4) and a water spraying device (9), the return air heat exchanger (4) is installed at the top of the diffusion tower (3), the water spraying device (9) is installed at the top of the return air heat exchanger (4), and the water spraying device (9) is connected with a water source heat pump unit;
the water collecting device comprises a water collecting tank (6), a water collecting tank (7) and water treatment equipment (10), wherein the water collecting tank (6) is arranged at the bottom of the return air heat exchanger (4), the water collecting tank (7) is arranged below the water collecting tank (6), the water collecting tank (7) is connected with the water collecting tank (6), the water treatment equipment (10) is arranged at an outlet of the water collecting tank (7), an inlet of the water treatment equipment (10) is connected with an outlet of the water collecting tank (7), and the water treatment equipment (10) is connected with the primary side circulating water pump (11).
4. The mine return air source cold and hot dual heat supply pump system according to claim 3, further comprising an electronic control device, wherein the electronic control device comprises a temperature sensor (30), a pressure sensor (31), a liquid level sensor (32) and a PLC controller;
the temperature sensor (30) and the pressure sensor (31) are both arranged on the water separator and the water collector, and the temperature sensor (30) and the pressure sensor (31) are used for monitoring the temperature and the pressure of secondary side supply and return water; the liquid level sensor (32) is positioned in the water collecting tank (7), and the liquid level sensor (32) is used for monitoring the liquid level in the water collecting tank (7); the input port of the PLC controller is respectively connected with the temperature sensor (30), the pressure sensor (31) and the liquid level sensor (32), and the output port of the PLC controller is respectively connected with the cold-hot integrated heat pump unit (1) and the bathing heating heat pump unit (2).
5. The mine return air source cold and hot dual-supply heat pump system according to claim 3, characterized in that the return duct (5) is provided with a main fan (8);
the water collecting tank (6), the water collecting tank (7) and the water treatment equipment (10) are all connected through pipelines.
6. The mine return air source cold and hot dual-supply heat pump system according to claim 1, characterized in that a valve X (29) is arranged at an inlet of the electric boiler (13), a valve IX (28) is arranged at an outlet of the electric boiler (13), a valve X (27) is arranged at an inlet of the cooling tower (12), a valve IX (26) is arranged at an outlet of the cooling tower (12), a valve V (18) and a valve I (19) are arranged on a secondary side return water pipe from the water collector to the cold and hot integrated heat pump unit (1), a valve II (20) and a valve VI (21) are arranged on a primary side water supply pipe from the primary side circulating water pump (11) to the cold and hot integrated heat pump unit (1), a valve V (22) and a valve I (23) are arranged on a secondary side water supply pipe from the cold and hot integrated heat pump unit (1) to the water separator, and a valve II (24) and a valve VI (25) are arranged on a primary side return water pipe from the cold and hot integrated heat pump unit (1);
in winter, opening a valve I (19), a valve II (20), a valve III (23) and a valve IV (24), and closing a valve V (18), a valve VI (21), a valve VII (22) and a valve VIII (25); and opening the valve IX (28) and the valve X (29) and starting the electric boiler (13) when extreme cold weather is met.
7. The mine return air source cold and hot dual heat supply pump system according to claim 6, wherein in summer, the valves V (18), VI (21), VII (22) and VIII (25) are opened, and the valves I (19), II (20), III (23) and IV (24) are closed; when extreme hot weather occurs, the valve XI (26) and the valve XII (27) are opened, and the cooling tower (12) is started.
8. The mine return air source cold and hot double heat supply pump system according to claim 6, wherein in the transition season, the valve V (18), the valve I (19), the valve II (20), the valve VI (21), the valve VII (22), the valve III (23), the valve IV (24), the valve VIII (25), the valve XI (26), the valve XII (27), the valve IX (28) and the valve X (29) are closed, and only the bathing heat pump unit (2) is opened for providing bathing hot water.
9. The mine return air source cold and hot dual-supply heat pump system according to claim 6, wherein the cold and hot integrated heat pump unit (1) and the bath heating heat pump unit (2) are at least 1;
the number of cooling towers (12) is determined according to the requirement.
10. The operation method of the mine return air source cold and hot dual heat supply pump system according to any one of claims 1 to 9 is characterized by comprising the following steps:
mine return air flows into the diffusion tower (3) through a return air shaft, and circulating water generated after the mine return air flows into the heat exchange device through a return air duct (5) formed by the diffusion tower (3) to exchange heat flows into the water collecting device and then is sent into the heat pump unit through a primary side circulating water pump (11);
in winter, an input port of the cold-hot integrated heat pump unit (1) is connected with an output port of the primary side circulating water pump (11), circulating water is led into the cold-hot integrated heat pump unit (1), and the circulating water is led into a water separator after heat exchange is completed to supply heat for users;
in summer, an input port of the cold-hot integrated heat pump unit (1) is connected with an output port of the primary side circulating water pump (11), circulating water is led into the cold-hot integrated heat pump unit (1), and the circulating water is led into a water separator after cold exchange is completed to supply cold for users;
when the heat pump unit is extremely hot, an input port of the cold-hot integrated heat pump unit (1) is connected with an output port of the primary side circulating water pump (11), an output port of the cold-hot integrated heat pump unit (1) is connected with the water separator to supply cold for a user, and an output port of the cold-hot integrated heat pump unit (1) is connected with an input port of the cooling tower (12) to supply cold water for the water collecting device;
when the water heater is extremely cold, an input port of the cold-hot integrated heat pump unit (1) is connected with an output port of the primary side circulating water pump (11), an input port of the electric boiler (13) is connected with an output port of the water collector, and the output ports of the cold-hot integrated heat pump unit (1) and the electric boiler (13) are connected with the water separator to supply heat for users;
when bathing, the input port of the bathing heating heat pump unit (2) is connected with the output port of the primary side circulating water pump (11), and the output port of the bathing heating heat pump unit (2) provides bathing water for users.
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| CN202111424875.0A CN114111109A (en) | 2021-11-26 | 2021-11-26 | Cold and hot dual-heat-supply pump system of mine air return source and operation method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3220458A (en) * | 1963-04-06 | 1965-11-30 | Middleton Charles Craib | Utilisation of methane in mine air |
| WO2005085717A1 (en) * | 2004-03-08 | 2005-09-15 | Shengheng Xu | An air conditioning system taking the ground as a heat source with heat pump |
| CN201852361U (en) * | 2010-11-09 | 2011-06-01 | 北京矿大节能科技有限公司 | Mine return air source heat pump system |
| CN105180245A (en) * | 2015-08-12 | 2015-12-23 | 北京矿大节能科技有限公司 | Double-heat-source heat energy utilization system for coal mine and operating mode thereof |
| CN110131924A (en) * | 2019-06-13 | 2019-08-16 | 山东博特瑞节能环保科技有限公司 | Return air residual heat in mine gradient utilization system |
| CN210004628U (en) * | 2019-06-13 | 2020-01-31 | 山东博特瑞节能环保科技有限公司 | Mine return air waste heat cascade utilization system |
| CN211781424U (en) * | 2020-03-23 | 2020-10-27 | 山西文龙中美环能科技股份有限公司 | Energy storage type return air waste heat multistage recovery's pit shaft system of preventing frostbite |
-
2021
- 2021-11-26 CN CN202111424875.0A patent/CN114111109A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3220458A (en) * | 1963-04-06 | 1965-11-30 | Middleton Charles Craib | Utilisation of methane in mine air |
| WO2005085717A1 (en) * | 2004-03-08 | 2005-09-15 | Shengheng Xu | An air conditioning system taking the ground as a heat source with heat pump |
| CN201852361U (en) * | 2010-11-09 | 2011-06-01 | 北京矿大节能科技有限公司 | Mine return air source heat pump system |
| CN105180245A (en) * | 2015-08-12 | 2015-12-23 | 北京矿大节能科技有限公司 | Double-heat-source heat energy utilization system for coal mine and operating mode thereof |
| CN110131924A (en) * | 2019-06-13 | 2019-08-16 | 山东博特瑞节能环保科技有限公司 | Return air residual heat in mine gradient utilization system |
| CN210004628U (en) * | 2019-06-13 | 2020-01-31 | 山东博特瑞节能环保科技有限公司 | Mine return air waste heat cascade utilization system |
| CN211781424U (en) * | 2020-03-23 | 2020-10-27 | 山西文龙中美环能科技股份有限公司 | Energy storage type return air waste heat multistage recovery's pit shaft system of preventing frostbite |
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