CN111829203A - System integrating functions of coal mine heating, refrigerating and bathing hot water preparation - Google Patents
System integrating functions of coal mine heating, refrigerating and bathing hot water preparation Download PDFInfo
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- CN111829203A CN111829203A CN202010796318.0A CN202010796318A CN111829203A CN 111829203 A CN111829203 A CN 111829203A CN 202010796318 A CN202010796318 A CN 202010796318A CN 111829203 A CN111829203 A CN 111829203A
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
Abstract
The invention relates to the technical field of waste heat utilization of coal mines, and discloses a system integrating functions of heating, refrigerating and bathing hot water preparation of a coal mine. The system disclosed by the invention integrates the functions of heating, refrigerating and preparing bath hot water in a coal mine, has low operation cost, can simultaneously heat, refrigerate and prepare bath hot water with proper temperature for the coal mine, has higher equipment safety, realizes the gradient utilization of energy, increases the comprehensive utilization rate of the energy, and achieves the purposes of energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of coal mine waste heat utilization, in particular to a system integrating functions of coal mine heating, refrigeration and bathing hot water preparation.
Background
Coal mine enterprises are large in scale, create huge economic benefits and are key energy consumption enterprises, and besides the requirements of annual power consumption, bathing hot water, clothes drying and the like, building heating devices must be arranged in winter to meet the requirement of shaft freezing prevention, and building cooling devices must be arranged in summer to meet the requirement of underground cooling.
The heat for coal mines is mostly satisfied by coal-fired boilers, gas-fired boilers or electric boilers. However, the coal-fired boiler has the problems of low thermal efficiency, direct pollutant discharge, resource waste and the like, so that the applicability of the coal-fired boiler is low. The problems of high nitrogen oxide emission, high operation cost and the like of the gas-fired boiler exist, and explosion accidents happen occasionally during the start-up and shut-down of the boiler, so that the safety of the gas-fired boiler is poor. Although the electric boiler is relatively safe to operate, the application is limited by the electric capacity of the coal mine, and the operating cost is high.
The coal mine cooling is mostly satisfied by a water chilling unit or a combination of a gas boiler and a steam type lithium bromide water chilling unit, the former has the problem of low equipment utilization rate, and the latter has the problems of high operation cost, low refrigeration performance coefficient (the refrigeration performance coefficient of a new unit is only 1.2), high refrigeration capacity attenuation speed (generally attenuating by about 1% every year) and the like besides the problem of low equipment utilization rate.
Disclosure of Invention
Based on the above, the invention aims to provide a system integrating the functions of coal mine heating, refrigeration and bath hot water preparation and coal mine waste heat utilization, and solves the problems of low safety, serious environmental pollution and high operating cost in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a system integrating functions of coal mine heating, refrigeration and bath hot water preparation comprises: the heat recovery unit is characterized in that circulating water in the heat recovery unit can absorb heat of lubricating oil of the air compressor to form high-temperature circulating water; the ventilation air methane cooling water assembly is characterized in that circulating water in the ventilation air methane cooling water assembly can absorb heat of ventilation air methane and/or cooling water to form low-temperature heat transfer water, and the cooling water comprises mine water burst and/or equipment cooling water; the water source heat pump is communicated with the ventilation air methane cooling water assembly, the water source heat pump can absorb heat in the low-temperature heat transfer water to heat circulating water to enable the circulating water to be heated to be high-temperature circulating water, and the water source heat pump can also absorb heat of the circulating water to enable the circulating water to be cooled to be cold supply water; the air source heat pump can prepare high-temperature circulating water by taking air as a heat source or prepare cold supply water by taking air as a heat sink; the natural gas assembly can heat circulating water by taking natural gas as fuel to heat the circulating water to high-temperature circulating water and/or steam; the gas power generation assembly can convert chemical energy of gas into electric energy and can also heat circulating water to heat the circulating water into high-temperature circulating water by utilizing waste heat generated by power generation; the solar module can heat circulating water by utilizing solar energy to heat the circulating water to high-temperature circulating water and can also convert the solar energy into electric energy; the heat exchange piece is used for preparing bath hot water, providing heat for a coal mine and absorbing heat in the coal mine and is respectively communicated with the heat recovery unit, the water source heat pump, the air source heat pump, the natural gas assembly, the gas power generation assembly and the solar assembly.
As an optimal scheme of the system integrating the functions of coal mine heating, refrigeration and bath hot water preparation, the system integrating the functions of coal mine heating, refrigeration and bath hot water preparation further comprises an electricity storage assembly, and the input end of the electricity storage assembly is electrically connected with the gas power generation assembly, the solar energy assembly, the water source heat pump and the air source heat pump respectively.
As a preferred scheme of a system integrating functions of heating, refrigerating and preparing bathing hot water in a coal mine, the electricity storage assembly comprises an energy storage battery and an energy storage flow changer, the energy storage battery is electrically connected with the energy storage flow changer, and the energy storage flow changer is respectively electrically connected with the gas power generation assembly and the solar assembly.
As an optimal scheme of the system integrating the functions of coal mine heating, refrigeration and bath hot water preparation, the system integrating the functions of coal mine heating, refrigeration and bath hot water preparation further comprises a power supply, and the power supply is electrically connected with the electricity storage assembly, the gas power generation assembly, the solar assembly, the air source heat pump and the water source heat pump respectively.
As a preferred scheme of a system integrating functions of coal mine heating, refrigeration and bath hot water preparation, the heat exchange part comprises a heating part, a bathroom anti-scale heat exchanger and a refrigeration heat exchanger, the refrigeration heat exchanger is communicated with the water source heat pump and/or the air source heat pump, the refrigeration heat exchanger can absorb heat in a coal mine, the heating part can provide heat for the coal mine, and high-temperature circulating water in the bathroom anti-scale heat exchanger can heat bath cold water.
As an optimal scheme of a system integrating functions of coal mine heating, refrigeration and bath hot water preparation, the heating part comprises one or at least two of a water heating radiator, a steam heating radiator, a fan coil and floor heating, the steam heating radiator is communicated with a natural gas assembly, when the temperature of high-temperature circulating water is between a first temperature and a second temperature, the heat exchange part is the fan coil and/or the floor heating and/or a bathroom anti-scale heat exchanger, when the temperature of the high-temperature circulating water is between the second temperature and a third temperature, the heat exchange part is the water heating radiator, and the first temperature, the second temperature and the third temperature are sequentially increased.
As a preferred scheme of a system integrating the functions of coal mine heating, refrigeration and bath hot water preparation, the bathroom anti-scale heat exchanger comprises: the box body is provided with a water inlet and a water outlet; the primary water collector is arranged in the box body; the secondary water collector is provided with at least one water collector, one end of the secondary water collector is closed, and the other end of the secondary water collector is communicated with the primary water collector; the first-stage water separator is arranged in the box body; each secondary water separator is arranged opposite to one secondary water collector, one end of each secondary water separator is closed, and the other end of each secondary water separator is communicated with the corresponding primary water separator; the coil pipe is of a spiral structure, one end of the coil pipe is communicated with the secondary water collector, and the other end of the coil pipe is communicated with the secondary water separator.
As a preferred scheme of a system integrating functions of coal mine heating, refrigeration and bath hot water preparation, the ventilation air cooling water assembly comprises a ventilation air spray tower, a purification piece and a cooling water heat exchanger, the ventilation air spray tower and the purification piece are connected in series and then connected with the cooling water heat exchanger in parallel, the ventilation air spray tower can absorb heat of ventilation air to form low-temperature heat transfer water, the purification piece can purify the low-temperature heat transfer water discharged by the ventilation air spray tower, and the cooling water heat exchanger can absorb heat of the cooling water to form low-temperature heat transfer water.
As a preferred scheme of a system integrating functions of coal mine heating, refrigeration and bath hot water preparation, when the temperature of air is lower than a preset temperature, an outlet of the air source heat pump is communicated with an inlet of the water source heat pump, heat transfer water in the air source heat pump can absorb heat of the air to heat the air into low-temperature heat transfer water, and circulating water in the water source heat pump can absorb heat of the low-temperature heat transfer water to heat the air into high-temperature circulating water.
As an optimal scheme of a system integrating functions of coal mine heating, refrigeration and bath hot water preparation, the natural gas component comprises a hot water natural gas boiler and a steam natural gas boiler, the hot water natural gas boiler and the steam natural gas boiler are arranged in parallel, the hot water natural gas boiler can heat circulating water by taking natural gas as fuel to heat the circulating water to enable the circulating water to be heated to be high-temperature circulating water, and the steam natural gas boiler can heat the circulating water by taking natural gas as fuel to enable the circulating water to be heated to be steam.
As a preferred scheme of a system integrating the functions of coal mine heating, refrigeration and bath hot water preparation, the outlet of the steam natural gas boiler is communicated with the heat exchange part, or the outlet of the steam natural gas boiler is communicated with the heat exchange part through a steam-water heat exchanger, and circulating water in the steam-water heat exchanger can absorb heat of the steam to form high-temperature circulating water.
As an optimal scheme of a system integrating functions of coal mine heating, refrigeration and bathing hot water preparation, the gas power generation assembly comprises a gas generator set, a gas heat exchanger and a waste heat boiler, the gas heat exchanger can utilize the heat of cylinder jacket cooling water of the gas generator set so as to heat circulating water into high-temperature circulating water, and the waste heat boiler can utilize the heat of flue gas of the gas generator set so as to heat the circulating water into the high-temperature circulating water.
As an optimal selection scheme of the system that the hot water's of collecting coal mine heating, refrigeration and preparing bathing function is as an organic whole, solar energy component includes solar energy collection machine group and photovoltaic generating set, solar energy collection machine group with photovoltaic generating set connects the setting in parallel, solar energy collection machine group can utilize solar energy heating circulating water to make it heat up for the high temperature circulating water, photovoltaic generating set can with solar energy converts the electric energy into.
As a preferred scheme of the system integrating the functions of coal mine heating, refrigeration and bath hot water preparation, the system integrating the functions of coal mine heating, refrigeration and bath hot water preparation further comprises a cooling assembly, an outlet of lubricating oil of the heat recovery unit is directly communicated with the air compressor, or the outlet of the lubricating oil is communicated with the air compressor through the cooling assembly.
The invention has the beneficial effects that: the system disclosed by the invention integrates the functions of heating, refrigerating and preparing hot bath water in a coal mine, has low operation cost, can simultaneously heat, refrigerate and prepare hot bath water with proper temperature for the coal mine, has higher equipment safety due to the use of the heat of lubricating oil of an air compressor and the use of ventilation air methane, mine water burst, equipment cooling water, gas, air, solar energy and natural gas as energy sources, realizes the cascade utilization of the energy sources, increases the comprehensive utilization rate of the energy sources and achieves the purposes of energy conservation and emission reduction.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a block diagram of a system integrating functions of coal mine heating, refrigeration and bath hot water preparation according to an embodiment of the present invention.
In the figure:
1. a heat recovery unit;
21. a ventilation air methane spray tower; 22. a purifying member; 23. a cooling water heat exchanger;
3. a water source heat pump;
4. an air source heat pump;
51. a hot water natural gas boiler; 52. a steam natural gas boiler; 53. a steam-water heat exchanger;
61. a gas generator set; 62. a gas heat exchanger; 63. a waste heat boiler;
71. a solar heat collection unit; 72. a photovoltaic generator set;
81. a heating element; 82. a bathroom anti-scaling heat exchanger; 83. a refrigeration heat exchanger;
9. an electricity storage assembly; 91. an energy storage battery; 92. a stored energy streamer;
10. a power source.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the embodiment provides a system integrating functions of coal mine heating, refrigeration and bath hot water preparation, the system includes a heat recovery unit 1, a ventilation air methane cooling water component, a water source heat pump 3, an air source heat pump 4, a natural gas component, a gas power generation component, a solar component and a heat exchange component, circulating water in the heat recovery unit 1 can absorb heat of lubricating oil of an air compressor to form high-temperature circulating water, circulating water in the ventilation air methane cooling water component can absorb ventilation air methane and/or heat of cooling water to form low-temperature heat transfer water, the cooling water includes mine water burst and/or equipment cooling water, the water source heat pump 3 is communicated with the ventilation air methane cooling water component, the water source heat pump 3 can absorb heat in the low-temperature heat transfer water to heat the circulating water to high-temperature circulating water, the water source heat pump 3 can also absorb heat of the circulating water to cool the, the air source heat pump 4 can use air as a heat source to prepare high-temperature circulating water or use air as a heat sink to prepare cold supply water, the natural gas component can use natural gas as fuel to heat the circulating water to enable the circulating water to be heated up to be the high-temperature circulating water and/or steam, the gas power generation component can convert chemical energy of gas into electric energy, waste heat generated by power generation can be used for heating the circulating water to enable the circulating water to be heated up to be the high-temperature circulating water, and the solar component can use solar energy to heat the circulating water to enable the circulating water to be heated up to be the high-temperature circulating. The heat exchange piece is used for preparing bath hot water, providing heat for a coal mine and absorbing heat in the coal mine and is respectively communicated with the heat recovery unit 1, the water source heat pump 3, the air source heat pump 4, the natural gas component, the gas power generation component and the solar component.
Note that the solid lines in fig. 1 represent two-by-two communication, and the dashed lines represent electrical connections. The system that the collection colliery heating, refrigeration of this embodiment and prepare hot water of bathing function as an organic whole still includes cooling module, and the export of the lubricating oil of heat recovery unit 1 is direct to be communicated with air compressor, perhaps the export of lubricating oil passes through cooling module and air compressor intercommunication. Specifically, when the temperature of the lubricating oil after heat exchange with the circulating water is reduced to below 60 ℃, the outlet of the lubricating oil of the heat recovery unit 1 is directly communicated with the air compressor, and when the temperature of the lubricating oil after heat exchange with the circulating water still exceeds 60 ℃, the lubricating oil needs to be firstly cooled by the cooling assembly and then returns to the air compressor. Specifically, the cooling assembly is a structure for cooling lubricating oil at the outlet of the air compressor before improvement, and the cooling assembly is used for cooling the lubricating oil.
The system integrating the functions of heating, refrigerating and preparing hot bath water in the coal mine is low in operating cost, can simultaneously heat, refrigerate and prepare hot bath water with proper temperature for the coal mine, is high in equipment safety due to the fact that heat of lubricating oil of an air compressor is used and ventilation air methane, mine water burst, equipment cooling water, gas, air, solar energy and natural gas are used as energy sources, achieves gradient utilization of the energy sources, increases the comprehensive utilization rate of the energy sources, and achieves the purposes of energy conservation and emission reduction.
As shown in fig. 1, the system integrating functions of heating, refrigerating and preparing hot water for bathing in a coal mine of this embodiment further includes an electricity storage assembly 9, the electricity storage assembly 9 is used for storing electric energy, and an input end of the electricity storage assembly 9 is electrically connected to the gas power generation assembly, the solar energy assembly, the water source heat pump 3 and the air source heat pump 4 respectively. Specifically, as shown in fig. 1, the electricity storage assembly 9 of the present embodiment includes an energy storage battery 91 and an energy storage rheometer 92, the energy storage battery 91 is electrically connected to the energy storage rheometer 92, and the energy storage rheometer 92 is electrically connected to the gas power generation assembly and the solar module, respectively.
When the generated energy of the gas power generation assembly and the solar assembly is large, redundant electric energy can be stored in the electricity storage assembly 9, so that electric energy can be provided for the system when the power generation of the gas power generation assembly and the solar assembly is insufficient, and the normal operation of the whole system is ensured.
As shown in fig. 1, the system integrating functions of heating, refrigerating and preparing hot water for bathing in a coal mine further includes a power source 10, the power source 10 is a power plant, and the power source 10 is electrically connected to an electricity storage assembly 9, a gas power generation assembly, a solar assembly, an air source heat pump 4 and a water source heat pump 3 respectively. When the gas power generation assembly and the solar energy assembly generate insufficient power and the electric quantity in the electricity storage assembly 9 is exhausted, the power supply 10 can provide electric energy for the air source heat pump 4 and the water source heat pump 3. If the electricity price provided by the power source 10 is executed according to the time-of-use electricity price policy, it can be considered that electricity is purchased from a power plant and stored in the energy storage battery 91 at the low-price valley period of the electricity price, and then the energy storage battery 91 releases electric energy to be used by the air source heat pump 4 and the water source heat pump 3 at the peak period of the electricity price, so that the electricity cost can be saved, the peak shaving effect of a power grid can be achieved, and the purpose of peak clipping and valley filling can be achieved.
As shown in fig. 1, the heat exchange unit of this embodiment includes a heating unit 81, a bathroom anti-scaling heat exchanger 82 and a refrigeration heat exchanger 83, the refrigeration heat exchanger 83 is communicated with the water source heat pump 3 and/or the air source heat pump 4, the refrigeration heat exchanger 83 can absorb heat in the coal mine, the heating unit 81 can provide heat for the coal mine, and the high-temperature circulating water in the bathroom anti-scaling heat exchanger 82 can heat bathing cold water.
Specifically, heating piece 81 includes one or at least two in hot-water heating radiator, steam-heating radiator, fan coil and the ground heating, steam-heating radiator and natural gas subassembly intercommunication, when the temperature of high-temperature circulating water was located between first temperature and the second temperature, the piece of changing heat was fan coil, and/or ground warms up, and/or bathroom scale control heat exchanger 82, when the temperature of high-temperature circulating water was located between second temperature and the third temperature, the piece of changing heat was the hot-water heating radiator, first temperature, second temperature and third temperature increase in proper order. The first temperature in this example was 45 deg.C, the second temperature was 55 deg.C, and the third temperature was 70 deg.C. Of course, in other embodiments of the present invention, the first temperature, the second temperature, and the third temperature are not limited to the limitation of this embodiment, and may be other values, which are specifically set according to actual needs.
Further, when the high-temperature circulating water provides heat for the mine through the heating part 81, the temperature in the mine can be increased to about 20 ℃, and the high-temperature circulating water is cooled to 40-55 ℃, returns to the heat recovery unit 1, the water source heat pump 3, the air source heat pump 4, the natural gas component, the gas power generation component and the solar component, and is reheated to be the high-temperature circulating water with the temperature between the first temperature and the third temperature.
Bathroom scale control heat exchanger 82 of this embodiment includes the box, the one-level water collector, the second grade water collector, second grade water knockout drum and coil pipe, bathroom scale control heat exchanger 82's concrete structure is not shown in the figure, water inlet and delivery port have been seted up on the box, the one-level water collector sets up in the box, the second grade water collector is provided with at least one, second grade water collector one end is sealed, the other end communicates in the one-level water collector, the one-level water knockout drum sets up in the box, every second grade water knockout drum all is relative with a second grade water collector and establishes, second grade water knockout drum one end is sealed, the other end communicates in the one-level water knockout drum, the coil pipe is the heliciform structure, the.
The bathroom scale control heat exchanger 82 of this embodiment, through the coil pipe of heliciform structure, its one side effectively increases the heat transfer area in the unit volume, and the crooked spiral channel of on the other hand is favorable to strengthening the turbulent state of fluid, reduces the fluid resistance in the passageway, helps improving heat exchange efficiency. In addition, the coil pipe of helical structure can be because of the change of inside and outside medium temperature and the small amplitude is flexible, because incrustation scale and stainless steel expansion coefficient are different, the incrustation scale that the coil pipe surface formed can drop by oneself, effectively avoids the incrustation scale accumulation.
As shown in fig. 1, the ventilation air cooling water assembly of the present embodiment includes a ventilation air spray tower 21, a purifying member 22 and a cooling water heat exchanger 23, the ventilation air spray tower 21 and the purifying member 22 are connected in series and then are connected in parallel with the cooling water heat exchanger 23, the ventilation air spray tower 21 can absorb heat of ventilation air to form low-temperature heat transfer water, the purifying member 22 can purify low-temperature heat transfer water discharged through the ventilation air spray tower 21, and the cooling water heat exchanger 23 can absorb heat of cooling water to form low-temperature heat transfer water.
Specifically, when the ventilation air is used as a heat source, the water source heat pump 3 operates according to a heating working condition, circulating water absorbs heat of the ventilation air through the ventilation air spray tower 21, the temperature is raised to 13-20 ℃ to form low-temperature heat transfer water, the low-temperature heat transfer water is purified by the purifying piece 22 and then is conveyed into the water source heat pump 3 through a pipeline, the water source heat pump 3 absorbs heat of the low-temperature heat transfer water, the low-temperature heat transfer water is cooled to 8-15 ℃ and returns to the ventilation air spray tower 21 for recycling, and the circulating water is heated to 45-70 ℃ and then is supplied to the heat exchange piece through a water supply pipeline.
When ventilation air is used as a heat sink, the water source heat pump 3 operates according to a refrigeration working condition, the water source heat pump 3 can absorb the heat of circulating water to cool the circulating water into cold water, the temperature of the circulating water is reduced from 12 ℃ to 7 ℃, meanwhile, low-temperature heat transfer water forms high-temperature heat transfer water, the temperature of the low-temperature heat transfer water is 32 ℃, the temperature of the high-temperature heat transfer water is increased to 37 ℃, cooling water at 7 ℃ is conveyed into the refrigeration heat exchanger 83 through a water supply pipeline, the indoor temperature is cooled to about 25 ℃, the temperature of the cooling water is increased to 12 ℃ to form circulating water, and the circulating water is conveyed back to the water source heat pump 3 through a water. And introducing the high-temperature heat transfer water at 37 ℃ into the ventilation air methane spray tower 21 to exchange heat with ventilation air methane, and returning the heat transfer water to the water source heat pump 3 for recycling after the temperature is reduced to 32 ℃.
When the temperature of the air in the embodiment is lower than the preset temperature, the preset temperature is 0 ℃, the outlet of the air source heat pump 4 is communicated with the inlet of the water source heat pump 3, the heat transfer water in the air source heat pump 4 can absorb the heat of the air to be heated into low-temperature heat transfer water, and the circulating water in the water source heat pump 3 can absorb the heat of the low-temperature heat transfer water to be heated into high-temperature circulating water. When the temperature of the air is not lower than the preset temperature, the air source heat pump 4 directly absorbs the heat of the air to heat the circulating water into high-temperature circulating water.
Specifically, when air is used as a heat source, the air source heat pump 4 operates according to a heating working condition, when the air temperature is not lower than 0 ℃, the air source heat pump 4 extracts heat from the air under the driving of electric energy, the consumed electric energy and the extracted heat are all transferred to circulating water on the side of the refrigeration heat exchanger 83, the circulating water is heated to 45-70 ℃ and then is supplied to a heat exchange part through a water supply pipeline, and the high-temperature circulating water is cooled to 40-55 ℃ and then is returned to the air source heat pump 4 through a water return pipeline for recycling. When the air temperature is lower than 0 ℃, the air source heat pump 4 and the water source heat pump 3 heat the circulating water together into high-temperature circulating water, namely the air source heat pump 4 and the water source heat pump 3 run in a coupling mode at the moment, the air source heat pump 4 extracts heat from the air under the drive of electric energy, the consumed electric energy and the extracted heat are all transferred to heat transfer water on the side of the refrigeration heat exchanger 83, the heat transfer water is heated to 20 ℃ to form low-temperature heat transfer water, the low-temperature heat transfer water is sent into the water source heat pump 3 through a pipeline, the water source heat pump 3 extracts heat from the low-temperature heat transfer water at 20 ℃ under the drive of the electric energy, and the low-temperature heat transfer water returns to the refrigeration heat exchanger 83. The electric energy consumed by the water source heat pump 3 and the heat extracted from the low-temperature heat transfer water with the temperature of 20 ℃ are completely transferred to the circulating water, the circulating water is heated to 45-70 ℃ and then is supplied to the heat exchange part through the water supply pipeline, and the high-temperature circulating water is cooled to 40-55 ℃ and then is returned to the air source heat pump 4 through the water return pipeline for recycling.
When air is used as a heat sink, the air source heat pump 4 operates according to a refrigeration working condition, the air source heat pump 4 extracts heat from circulating water at the evaporator side under the driving of electric energy, and the temperature of the circulating water is reduced from 12 ℃ to 7 ℃ to form cooling water. The 7 ℃ cooling water is conveyed into the refrigeration heat exchanger 83 through a water supply pipeline, so that the indoor temperature is cooled to about 25 ℃, the temperature of the cooling water is increased to 12 ℃ to form circulating water, and the 12 ℃ circulating water is returned to the air source heat pump 4 through a water return pipeline for recycling. The electric power consumed by the air-source heat pump 4 and the heat extracted from the circulating water are all transferred to the outside air on the side of the cooling heat exchanger 83.
It should be noted that when the heat sink of the ventilation air is insufficient, the ventilation air can be used as the main heat sink, and the air can be used as the supplementary heat sink for cooling.
As shown in fig. 1, the natural gas assembly of the present embodiment includes a hot water natural gas boiler 51 and a steam natural gas boiler 52, the hot water natural gas boiler 51 and the steam natural gas boiler 52 are arranged in parallel, the hot water natural gas boiler 51 can heat the circulating water with natural gas as fuel to raise the temperature of the circulating water to high-temperature circulating water, and the steam natural gas boiler 52 can heat the circulating water with natural gas as fuel to raise the temperature of the circulating water to steam. The outlet of the steam natural gas boiler 52 is communicated with the heat exchange part, or the outlet of the steam natural gas boiler 52 is communicated with the heat exchange part through the steam-water heat exchanger 53, and circulating water in the steam-water heat exchanger 53 can absorb heat of steam to form high-temperature circulating water.
Specifically, for the hot water natural gas boiler 51, the circulating water is heated to 45-70 ℃ high-temperature circulating water by using high-temperature flue gas generated by natural gas combustion, the high-temperature circulating water is supplied to the heat exchange part through the water supply pipeline, and the high-temperature circulating water is returned to the hot water natural gas boiler 51 for recycling through the water return pipeline after the temperature of the high-temperature circulating water is reduced to 40-55 ℃. For the steam natural gas boiler 52, high-temperature flue gas generated by natural gas combustion is used for heating condensed water to prepare steam, the steam is supplied through a steam supply pipeline and can be supplied to a steam heating radiator to heat the indoor temperature to about 20 ℃, and also can be supplied to a steam-water heat exchanger 53 to prepare high-temperature circulating water at the temperature of 45-70 ℃, the steam is condensed into liquid water and then is sent back to the steam natural gas boiler 52 through a water return pipeline for recycling, the high-temperature circulating water at the temperature of 45-70 ℃ is supplied to a heat exchange part through a water supply pipeline, the temperature of the high-temperature circulating water is reduced to 40-55 ℃ to form circulating water, and the circulating water is sent back.
As shown in fig. 1, the gas power generation assembly of the present embodiment includes a gas generator set 61, a gas heat exchanger 62 and a waste heat boiler 63, the gas heat exchanger 62 can heat the circulating water to be high-temperature circulating water by using heat of jacket cooling water of the gas generator set 61, and the waste heat boiler 63 can heat the circulating water to be high-temperature circulating water by using heat of flue gas of the gas generator set 61.
Specifically, high-grade energy generated by burning medium-low concentration gas is used for driving a gas generator set 61 to generate electricity, 80-110 ℃ cylinder jacket cooling water generated in the electricity generating process of the gas generator set 61 is introduced into a gas heat exchanger 62 to exchange heat with circulating water, 350-600 ℃ flue gas generated in the electricity generating process is introduced into a waste heat boiler 63 to exchange heat with the circulating water, the circulating water with lower temperature is heated into 45-70 ℃ high-temperature circulating water, the temperature of the cylinder jacket cooling water is reduced to a proper temperature and then returned to the gas generator set 61 to be recycled, the temperature of the cylinder jacket cooling water is generally reduced to below 70 ℃, the flue gas entering the waste heat boiler 63 exchanges heat with the circulating water and then is discharged into the atmosphere, the 45-70 ℃ high-temperature circulating water is supplied to a heat exchange part through a water supply pipeline, and the temperature of the high-temperature circulating, the circulating water is sent back to the gas heat exchanger 62 and the waste heat boiler 63 through a water return pipeline for recycling. Because the cascade utilization of energy is realized, the technology has higher comprehensive utilization efficiency of energy.
As shown in fig. 1, the solar module of the present embodiment includes a solar heat collection unit 71 and a photovoltaic generator unit 72, the solar heat collection unit 71 and the photovoltaic generator unit 72 are arranged in parallel, the solar heat collection unit 71 can heat circulating water by using solar energy to heat the circulating water to raise the temperature of the circulating water to high-temperature circulating water, and the photovoltaic generator unit 72 can convert the solar energy into electric energy.
Specifically, when solar energy is used for power generation, the photovoltaic generator set 72 is disposed on the building roof or the goaf, and solar energy is directly converted into electric energy by using the solar cell of the photovoltaic generator set 72. When solar heat collection is utilized, solar energy is converted into heat energy through the solar heat collecting pipes of the solar heat collecting unit 71, circulating water is heated to 45-70 ℃ high-temperature circulating water and then stored in the water storage tank, the circulating water is supplied to the heat exchange part through the water supply pipeline, the temperature of the high-temperature circulating water is reduced to 40-55 ℃ to form circulating water, and the circulating water is returned to the solar heat collecting pipes through the water return pipeline for recycling.
It should be noted that, because the waste heat resources of the coal mine have the advantages of multiple types, large quantity, low grade, stability, reliability and the like, the utilization of the waste heat resources becomes possible, the waste heat recycling technology is developed, and the method is an effective way for reasonably using energy and realizing energy conservation and emission reduction of the coal mine. The available waste heat resources comprise ventilation air, mine water burst, equipment cooling water, lubricating oil of an air compressor, smoke discharged by a gas generator, cylinder jacket cooling water and the like, wherein the equipment cooling water comprises cooling water discharged by a gas drainage pump, cooling water discharged by a speed reducer and the like. The reasonable utilization of the waste heat can at least solve the heat utilization requirement of 50 percent of coal mines generally, and the heat utilization requirement of the whole coal mine can be even solved for the coal mine with high water flow. Taking the first coal mine in Shanxi jin City and the second coal mine in Henan Yongcity as examples, the heat demand of the first coal mine is 20MW although the water flow is only 12m3The total amount of equipment cooling water, ventilation air, the waste heat of a gas generator and the waste heat of an air compressor reaches 14 MW; the heat demand of the second coal mine is 12MW, the waste heat of the water burst of the mine is up to 10.2MW, and the water flow reaches 625m3And h, the waste heat of ventilation air, lubricating oil of an air compressor and equipment cooling water is added, and the total waste heat reaches 20 MW.
Specifically, during actual application, waste heat resources such as ventilation air, mine water burst and gas and renewable energy such as air and solar energy are preferably selected, so that gradient utilization of energy is realized, pollution to the environment is reduced, the comprehensive utilization rate of energy is high, the thermal efficiency is improved, and the operation cost is reduced.
The system integrating the functions of coal mine heating, refrigeration and bath hot water preparation has the following advantages:
the system integrating the functions of heating, refrigerating and preparing bath hot water in the coal mine can fully utilize waste heat resources and renewable energy sources, compared with the current refrigerating system and heating system, although the initial investment is high, the annual operating cost is saved by more than 50%, and the increased initial investment can be recovered within 3 years generally;
the energy-saving and emission-reducing effects are remarkable, when the system is applied specifically, waste heat resources and renewable energy resources are preferentially utilized, energy cascade utilization is realized, the comprehensive utilization rate of energy is higher, and compared with the conventional refrigerating system and heating system, the system only needs to consume a small amount of electric energy, coal and natural gas, so that the emission of pollutants such as nitrogen oxides and carbon dioxide is greatly reduced, and the energy-saving and emission-reducing advantages are obvious;
the system is safer, more stable and more reliable, and in the aspects of heat sources and heat sinks, stable and reliable resources are preferably selected, renewable resources with relatively poor stability and continuity are used as supplements and backups, and in the technical aspect, mature equipment without power or with few power parts is preferably selected, so that the system is ensured to operate stably and reliably.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. The utility model provides a collect colliery heating, refrigeration and prepare system as an organic whole of bathing hot water's function which characterized in that includes:
the heat recovery unit (1) is characterized in that circulating water in the heat recovery unit can absorb heat of lubricating oil of the air compressor to form high-temperature circulating water;
the ventilation air methane cooling water assembly is characterized in that circulating water in the ventilation air methane cooling water assembly can absorb heat of ventilation air methane and/or cooling water to form low-temperature heat transfer water, and the cooling water comprises mine water burst and/or equipment cooling water;
the water source heat pump (3) is communicated with the ventilation air methane cooling water assembly, the water source heat pump (3) can absorb heat in the low-temperature heat transfer water to heat circulating water to enable the circulating water to be heated to be high-temperature circulating water, and the water source heat pump (3) can also absorb heat of the circulating water to enable the circulating water to be cooled to be cold supply water;
the air source heat pump (4) can prepare high-temperature circulating water by taking air as a heat source or prepare cold supply water by taking air as a heat sink;
the natural gas assembly can heat circulating water by taking natural gas as fuel to heat the circulating water to high-temperature circulating water and/or steam;
the gas power generation assembly can convert chemical energy of gas into electric energy and can also heat circulating water to heat the circulating water into high-temperature circulating water by utilizing waste heat generated by power generation;
the solar module can heat circulating water by utilizing solar energy to heat the circulating water to high-temperature circulating water and can also convert the solar energy into electric energy;
the heat exchange piece is used for preparing bath hot water, providing heat for a coal mine and absorbing heat in the coal mine and is respectively communicated with the heat recovery unit (1), the water source heat pump (3), the air source heat pump (4), the natural gas component, the gas power generation component and the solar component.
2. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 1, wherein the system integrating coal mine heating, refrigeration and bath hot water preparation functions further comprises an electricity storage assembly (9), and an input end of the electricity storage assembly (9) is electrically connected with the gas power generation assembly, the solar energy assembly, the water source heat pump (3) and the air source heat pump (4) respectively.
3. The system for integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 2, wherein the electricity storage assembly (9) comprises an energy storage battery (91) and an energy storage rheometer (92), the energy storage battery (91) and the energy storage rheometer (92) are electrically connected, and the energy storage rheometer (92) is electrically connected with the gas power generation assembly and the solar energy assembly respectively.
4. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 2, wherein the system integrating coal mine heating, refrigeration and bath hot water preparation functions further comprises a power supply (10), and the power supply (10) is electrically connected with the electricity storage assembly (9), the gas power generation assembly, the solar energy assembly, the air source heat pump (4) and the water source heat pump (3) respectively.
5. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 1, wherein the heat exchange piece comprises a heating piece (81), a bathroom anti-scale heat exchanger (82) and a refrigeration heat exchanger (83), the refrigeration heat exchanger (83) is communicated with the water source heat pump (3) and/or the air source heat pump (4), the refrigeration heat exchanger (83) can absorb heat in a coal mine, the heating piece (81) can provide heat for the coal mine, and high-temperature circulating water in the bathroom anti-scale heat exchanger (82) can heat bath cold water.
6. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 5, wherein the heating element (81) comprises one or at least two of a water heating radiator, a steam heating radiator, a fan coil and a floor heating unit, the steam heating radiator is communicated with the natural gas assembly, when the temperature of the high-temperature circulating water is between a first temperature and a second temperature, the heat exchange element is the fan coil and/or the floor heating unit and/or a bathroom anti-scale heat exchanger (82), when the temperature of the high-temperature circulating water is between a second temperature and a third temperature, the heat exchange element is the water heating radiator, and the first temperature, the second temperature and the third temperature are sequentially increased.
7. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 5, wherein the bathroom anti-scaling heat exchanger (82) comprises:
the box body is provided with a water inlet and a water outlet;
the primary water collector is arranged in the box body;
the secondary water collector is provided with at least one water collector, one end of the secondary water collector is closed, and the other end of the secondary water collector is communicated with the primary water collector;
the first-stage water separator is arranged in the box body;
each secondary water separator is arranged opposite to one secondary water collector, one end of each secondary water separator is closed, and the other end of each secondary water separator is communicated with the corresponding primary water separator;
the coil pipe is of a spiral structure, one end of the coil pipe is communicated with the secondary water collector, and the other end of the coil pipe is communicated with the secondary water separator.
8. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 1, wherein the ventilation air cooling water assembly comprises a ventilation air spray tower (21), a purification piece (22) and a cooling water heat exchanger (23), the ventilation air spray tower (21) and the purification piece (22) are connected in series and then are connected in parallel with the cooling water heat exchanger (23), the ventilation air spray tower (21) can absorb heat of ventilation air to form low-temperature heat transfer water, the purification piece (22) can purify the low-temperature heat transfer water discharged from the ventilation air spray tower (21), and the cooling water heat exchanger (23) can absorb heat of the cooling water to form low-temperature heat transfer water.
9. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 1, wherein when the temperature of air is lower than a preset temperature, the outlet of the air source heat pump (4) is communicated with the inlet of the water source heat pump (3), heat transfer water in the air source heat pump (4) can absorb heat of the air to heat the air into low-temperature heat transfer water, and circulating water in the water source heat pump (3) can absorb heat of the low-temperature heat transfer water to heat the air into high-temperature circulating water.
10. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 1, wherein the natural gas component comprises a hot water natural gas boiler (51) and a steam natural gas boiler (52), the hot water natural gas boiler (51) and the steam natural gas boiler (52) are arranged in parallel, the hot water natural gas boiler (51) can heat circulating water by using natural gas as fuel to heat the circulating water to high-temperature circulating water, and the steam natural gas boiler (52) can heat the circulating water by using natural gas as fuel to heat the circulating water to steam.
11. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in claim 10, wherein an outlet of the steam natural gas boiler (52) is communicated with the heat exchange member, or an outlet of the steam natural gas boiler (52) is communicated with the heat exchange member through a steam-water heat exchanger (53), and circulating water in the steam-water heat exchanger (53) can absorb heat of the steam to form high-temperature circulating water.
12. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in any one of claims 1 to 11, wherein the gas power generation assembly comprises a gas generator set (61), a gas heat exchanger (62) and a waste heat boiler (63), the gas heat exchanger (62) can utilize the heat of jacket cooling water of the gas generator set (61) to heat circulating water into high-temperature circulating water, and the waste heat boiler (63) can utilize the heat of flue gas of the gas generator set (61) to heat circulating water into high-temperature circulating water.
13. The system integrating coal mine heating, refrigeration and bath hot water preparation functions as claimed in any one of claims 1 to 11, wherein the solar module comprises a solar heat collection unit (71) and a photovoltaic generator unit (72), the solar heat collection unit (71) and the photovoltaic generator unit (72) are arranged in parallel, the solar heat collection unit (71) can heat circulating water by using solar energy to heat the circulating water to be high-temperature circulating water, and the photovoltaic generator unit (72) can convert the solar energy into electric energy.
14. The system for integrating coal mine heating, refrigeration and hot bath water production as claimed in any one of claims 1 to 11, wherein the system for integrating coal mine heating, refrigeration and hot bath water production further comprises a cooling component, and the outlet of the lubricating oil of the heat recovery unit (1) is directly communicated with the air compressor, or the outlet of the lubricating oil is communicated with the air compressor through the cooling component.
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| CN202010796318.0A CN111829203A (en) | 2020-08-10 | 2020-08-10 | System integrating functions of coal mine heating, refrigerating and bathing hot water preparation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776110A (en) * | 2021-08-13 | 2021-12-10 | 华电电力科学研究院有限公司 | Comprehensive energy supply system for coal mine |
| CN114719355A (en) * | 2022-04-06 | 2022-07-08 | 中煤科工(天津)清洁能源研究院有限公司 | Temperature adjusting system and calculating method |
| CN114838525A (en) * | 2022-03-23 | 2022-08-02 | 北京圆之翰工程技术有限公司 | Method and system for heat extraction and reuse based on coal mine gas extraction equipment |
| CN115095374A (en) * | 2022-06-21 | 2022-09-23 | 中国矿业大学 | Energy coupling system for mine cooling, sealed storage and heat pump heat extraction |
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2020
- 2020-08-10 CN CN202010796318.0A patent/CN111829203A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776110A (en) * | 2021-08-13 | 2021-12-10 | 华电电力科学研究院有限公司 | Comprehensive energy supply system for coal mine |
| CN114838525A (en) * | 2022-03-23 | 2022-08-02 | 北京圆之翰工程技术有限公司 | Method and system for heat extraction and reuse based on coal mine gas extraction equipment |
| CN114838525B (en) * | 2022-03-23 | 2023-11-24 | 北京圆之翰工程技术有限公司 | Method and system for heat extraction and recycling based on coal mine gas extraction equipment |
| CN114719355A (en) * | 2022-04-06 | 2022-07-08 | 中煤科工(天津)清洁能源研究院有限公司 | Temperature adjusting system and calculating method |
| CN114719355B (en) * | 2022-04-06 | 2023-02-03 | 中煤科工(天津)清洁能源研究院有限公司 | Temperature adjusting system and calculating method |
| CN115095374A (en) * | 2022-06-21 | 2022-09-23 | 中国矿业大学 | Energy coupling system for mine cooling, sealed storage and heat pump heat extraction |
| CN115095374B (en) * | 2022-06-21 | 2023-08-18 | 中国矿业大学 | Energy coupling system for mine cooling, sealing and storing heat and heat pump heating |
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Inventor after: Yang Yun Inventor after: Yu Zhao Inventor after: Li Jin Inventor after: Xiang Yanlei Inventor after: Zhou Zhongbo Inventor after: Fan Wei Inventor after: Xu Tong Inventor after: Liu Zixue Inventor after: Chen Jiangang Inventor after: Zhang Liye Inventor after: Yin Weifeng Inventor before: Yang Yun Inventor before: Li Jin Inventor before: Xiang Yanlei Inventor before: Zhou Zhongbo Inventor before: Fan Wei Inventor before: Xu Tong Inventor before: Liu Zixue Inventor before: Chen Jiangang Inventor before: Zhang Liye Inventor before: Yin Weifeng Inventor before: Yu Zhao |