Multi-heat-source coupling heat pump system for recycling coal mine waste heat
By designing a multi-heat source coupled heat pump system, the low-grade thermal energy of coal mine exhausted wind, inrush water and circulating cooling water is solved, and the problem of poor low temperature applicability and mismatch between hot and cold load of a single heat source heat pump is achieved efficient recovery and high coal mine waste heat Quality heat energy supply improves energy utilization efficiency and reduces environmental pollution.
Patent Information
- Application Number
- CN202421037571.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In the existing coal mine waste heat recovery technology, a single heat source heat pump has problems such as poor low temperature applicability and mismatch between hot and cold loads, resulting in unreasonable heating layout and failure to make full use of a variety of low-grade heat sources.
Design a multi-heat source coupled heat pump system to form a closed cycle through the parallel hot water circulation pipeline of the exhausted wind, rushing heat pump unit and circulating cooling water heat pump unit, and use the low-grade heat energy of exhausted wind, rushing water and circulating cooling water. Convert it into high-quality thermal energy supply mining area water equipment.
It realizes the continuous supply and efficient utilization of heat energy, improves energy utilization efficiency, and reduces energy consumption and environmental pollution.
Smart Images
Figure CN222230903U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat recovery in coal mines, in particular to a multi-heat source coupled heat pump system for recovering waste heat in coal mines. Background Art
[0002] Lean air refers to the air that has passed through the working face or other areas of a mine. In a mine, the activities of miners and mechanical equipment, including equipment operation and personnel breathing, consume a large amount of oxygen and produce carbon dioxide and other pollutants. This air that becomes oxygen-poor after use is called lean air.
[0003] Water inrush is a common phenomenon in coal mine systems, and its causes include natural and human factors. Natural causes mainly refer to the influence of geological structures and geological conditions around mines, such as complex underground veins, ore layer sliding, cracks, etc., which may cause groundwater to surge into mines.
[0004] In coal preparation plants, in order to maintain the normal operation of coal preparation equipment and the efficiency of coal production, circulating water is needed to cool the equipment. The water will continue to rise during use due to the heat discharge of the equipment. If effective measures are not taken to cool the water temperature, the coal preparation equipment will be affected.
[0005] In the utilization of waste heat in coal mines, the general heat recovery method is to separate the operation of heat sources such as exhaust air source, gushing water source and circulating cooling water source, and use exhaust air / gushing water / circulating cooling water heat pumps for separate heating. The advantages of multiple heat sources complementing each other are not fully utilized and the heating layout is unreasonable.
[0006] For the above problems, it is necessary to propose a multi-heat source coupled heat pump system for recovering waste heat from coal mines, which can comprehensively utilize a variety of low-grade heat sources in the coal mine area to complement and coordinate each other, improve the reliability of the heating system, and solve the problems of poor low-temperature applicability and mismatch of cold and hot loads of single heat source heat pumps. Utility Model Content
[0007] The utility model aims at the technical problems existing in the prior art and provides a multi-heat source coupled heat pump system for recovering waste heat from coal mines to solve the problems of poor low-temperature applicability and mismatch between cold and hot loads of the above-mentioned single heat source heat pump.
[0008] The utility model solves the above-mentioned technical problem with a technical solution as follows: a multi-heat source coupled heat pump system for recovering waste heat from a coal mine, comprising an exhaust air heat pump unit for collecting exhaust air heat from the coal mine, a gushing water heat pump unit for collecting gushing water from the coal mine, a circulating cooling water heat pump unit for collecting cooling water from the coal mine system, and a hot water circulation pipeline for sequentially connecting the exhaust air heat pump unit, the gushing water heat pump unit, and the circulating cooling water heat pump unit in parallel, wherein the hot water circulation pipeline is connected to each water-using equipment to form a water circulation loop.
[0009] On the basis of the above technical solution, the present invention can also be improved as follows.
[0010] Furthermore, the exhaust air heat pump unit, the gushing water heat pump unit and the circulating cooling water heat pump unit are all assembled from a condenser, a compressor, an oil separator and an evaporator.
[0011] Furthermore, the water-using equipment includes a fresh air heating box, a fan coil unit and a radiator which are sequentially connected in parallel with the hot water circulation pipeline through pipelines.
[0012] Furthermore, the water-using equipment includes a lack-air heat extraction box, a defrost channel of the lack-air heat extraction box is connected to a hot water circulation pipeline through a pipeline, and an electric heater for defrosting is also provided on the inlet pipeline of the defrost channel.
[0013] Furthermore, the refrigerant channel of the exhaust air heat extraction box is connected to the evaporator of the exhaust air heat pump unit through a low-temperature refrigerant circulation pipeline.
[0014] Furthermore, a low-temperature refrigerant pump is also provided on the low-temperature refrigerant circulation pipeline between the exhaust air heat extraction box and the exhaust air heat pump unit.
[0015] Furthermore, it also includes a low-temperature refrigerant system water replenishment tank and a low-temperature refrigerant system constant-pressure water replenishment device which are sequentially connected in series and connected to the low-temperature refrigerant circulation pipeline.
[0016] Furthermore, it also includes a water gushing tank and a water gushing pump which are sequentially connected in series and connected to the water gushing heat exchange pipeline of the evaporator in the water gushing heat pump unit.
[0017] Furthermore, the invention also includes a circulating cooling water pump disposed on the cooling water circulation pipeline of the evaporator in the circulating cooling water heat pump unit.
[0018] Furthermore, it also includes a hot water system water replenishment tank and a hot water system constant pressure water replenishment device which are sequentially connected in series and connected to the hot water circulation pipeline.
[0019] Moreover, the multi-heat source coupled heat pump system for recovering waste heat from coal mines provided by the utility model has at least the following beneficial effects compared with the prior art:
[0020] In the hot water circulation pipeline, water, as a carrier of thermal energy, is heated by the exhaust air heat pump unit, the gushing water heat pump unit, and the circulating cooling water heat pump unit in turn, and then sent to various water-using equipment. The hot water can be circulated smoothly in the pipeline through the hot water pump to ensure the continuous supply of thermal energy. The multi-heat source coupled heat pump system that recovers waste heat from coal mines can comprehensively utilize a variety of low-grade heat sources in the coal mining area, recover the heat energy therein and convert it into high-quality heat energy, providing thermal energy support for various water-using equipment in the mining area, which not only improves energy utilization efficiency and reduces energy consumption, but also helps to reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the system principle of the utility model.
[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0023] Exhaust air heat pump unit 1, gushing water heat pump unit 2, circulating cooling water heat pump unit 3, fresh air heating box 4, fan coil unit 5, radiator 6, exhaust air heat extraction box 7, gushing water tank 8, hot water pump 9, low-temperature refrigerant pump 10, gushing water pump 11, circulating cooling water pump 12, electric heater for defrosting 13, hot water system constant pressure water replenishment device 14, hot water system water replenishment tank 15, low-temperature refrigerant system constant pressure water replenishment device 16, low-temperature refrigerant system water replenishment tank 17. DETAILED DESCRIPTION
[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0025] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.
[0026] like Figure 1 As shown, the multi-heat source coupled heat pump system for recovering waste heat from coal mines of the present utility model comprises an exhaust air heat pump unit 1 for collecting heat from exhaust air in the coal mine, a gushing water heat pump unit 2 for collecting gushing water in the coal mine, a circulating cooling water heat pump unit 3 for collecting cooling water of the coal mine system, and a hot water circulation pipeline of the exhaust air heat pump unit 1, the gushing water heat pump unit 2 and the circulating cooling water heat pump unit 3 connected in parallel in sequence, the hot water circulation pipeline is connected to each water-using equipment to form a water circulation loop, and a hot water pump 9 is also arranged on the water circulation loop.
[0027] In this embodiment, the exhaust air heat pump unit 1, the gushing water heat pump unit 2, and the circulating cooling water heat pump unit 3 respectively collect low-grade heat energy from the exhaust air, gushing water, and circulating cooling water in the coal mine, and are connected together through a hot water circulation pipeline to form a closed hot water cycle; in the hot water circulation pipeline, water, as a carrier of heat energy, is heated by the exhaust air heat pump unit 1, the gushing water heat pump unit 2, and the circulating cooling water heat pump unit 3 in turn and then sent to each water-using equipment, and the hot water can be smoothly circulated in the pipeline through the hot water pump 9 to ensure the continuous supply of heat energy. The multi-heat source coupling heat pump system for recovering waste heat from coal mines can comprehensively utilize a variety of low-grade heat sources in the coal mine area, recover the heat energy therein and convert it into high-quality heat energy, and provide heat energy support for various water-using equipment in the mining area. This system not only improves energy utilization efficiency and reduces energy consumption, but also helps to reduce environmental pollution.
[0028] As an implementation method, the exhaust air heat pump unit 1, the gushing water heat pump unit 2 and the circulating cooling water heat pump unit 3 are all assembled by a condenser, a compressor, an oil separator and an evaporator. The refrigerant and the heat medium exchange heat in the evaporator, and the refrigerant absorbs heat and evaporates; the evaporated refrigerant is compressed by the compressor, the temperature and pressure increase, and then enters the condenser to release heat to the water in the hot water circulation pipeline, so that the water temperature increases, and at the same time the refrigerant is condensed into liquid, and returns to the evaporator after passing through the oil separator, completing a cycle; the above heat exchange process is the heat exchange principle of the existing heat pump unit, and will not be described in detail here.
[0029] As an embodiment, the water-using equipment includes a fresh air heating box 4, a fan coil 5 and a radiator 6 which are sequentially connected in parallel with the hot water circulation pipeline through pipelines. The fresh air heating box 4 can be used for heat protection of the wellbore, and the fan coil 5 and the radiator 6 can be used for indoor heating of the building.
[0030] In addition, the water-using equipment also includes a heat extraction box 7 for exhaust air, the defrost channel of which is connected to the hot water circulation pipeline through a pipeline, and an electric heater 13 for defrosting is also provided on the inlet pipeline of the defrost channel. The exhaust air heat extraction box 7 is mainly used to collect and process exhaust air in coal mines, that is, air rich in carbon dioxide and other pollutants after passing through the working face of the mine. These exhaust air contain a certain amount of heat energy, and the exhaust air heat extraction box 7 transfers this heat energy to the circulating coolant through the heat exchange process inside it.
[0031] Hot water is connected through the defrost channel to melt ice or frost that occurs during the use of the exhaust air heat extraction box 7 to avoid affecting the heat exchange. Only regular defrosting is required.
[0032] Specifically, the refrigerant channel of the exhaust air heat extraction box 7 is connected to the evaporator of the exhaust air heat pump unit through a low-temperature refrigerant circulation pipeline.
[0033] In this circulation pipeline, the low-temperature refrigerant (such as ethylene glycol solution) is used as a heat transfer medium and circulates between the exhaust air heat extraction box 7 and the evaporator. When the low-temperature refrigerant flows through the exhaust air heat extraction box 7, it absorbs the heat energy in the exhaust air and increases its own temperature; then after passing through the evaporator, the heat is absorbed by the evaporator and transferred to the hot water, and the working cycle is carried out.
[0034] Specifically, a low-temperature coolant pump 10 is further provided on the low-temperature coolant circulation pipeline between the exhaust air heat extraction box 7 and the exhaust air heat pump unit 7 to ensure that the coolant can circulate smoothly.
[0035] As a supplement, it also includes a low-temperature refrigerant system water replenishment tank 17 and a low-temperature refrigerant system constant-pressure water replenishment device 16 which are sequentially connected in series and connected to the low-temperature refrigerant circulation pipeline; the constant-pressure water replenishment device is used to maintain the pressure stability in the low-temperature refrigerant circulation pipeline. During the operation of the system, the pressure in the pipeline may change due to temperature changes, refrigerant evaporation, etc. The constant-pressure water replenishment device can sense the pressure change in time and replenish the refrigerant or discharge excess refrigerant to keep the system pressure within the set range.
[0036] As an embodiment, it also includes a gushing water tank 8 and a gushing water pump 11 which are sequentially connected in series and connected to the gushing water heat exchange pipeline of the evaporator in the gushing water heat pump unit 2. The gushing water tank 8 is used to store the gushing water collected from the coal mine. After being properly treated, the gushing water can be used as a heat source for the gushing water heat pump unit. The gushing water pump 11 is used to pump the gushing water in the gushing water tank 8 into the evaporator of the gushing water heat pump unit 2 for heat energy exchange.
[0037] As an embodiment, a circulating cooling water pump 12 is also provided on the cooling water circulation pipeline of the evaporator in the circulating cooling water heat pump unit 3. The circulating cooling water pump 12 is used to pump the circulating cooling water in the coal mine system into the evaporator of the circulating cooling water heat pump unit 3 to recover heat energy.
[0038] As an embodiment, it also includes a hot water system water replenishment tank 15 and a hot water system constant pressure water replenishment device 14 which are sequentially connected in series and connected to the hot water circulation pipeline. The hot water system water replenishment tank 15 is used to store a certain amount of water so that when the amount of water in the hot water circulation pipeline is reduced due to leakage, evaporation or other reasons, hot water can be replenished to the system in time.
[0039] As a supplement, the constant-pressure water replenishment device 16 of the low-temperature refrigerant system and the constant-pressure water replenishment device 14 of the hot water system in this embodiment are both assembled from an expansion tank and a water replenishment pump, which will not be described in detail here.
[0040] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.
[0041] Although the preferred embodiments of the utility model have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model.
[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A multi-heat source coupled heat pump system for recovering waste heat from coal mines, characterized in that: It includes an exhaust air heat pump unit for collecting heat from exhaust air in a coal mine, a gushing water heat pump unit for collecting gushing water in a coal mine, a circulating cooling water heat pump unit for collecting cooling water in a coal mine system, and a hot water circulation pipeline which sequentially connects the exhaust air heat pump unit, the gushing water heat pump unit, and the circulating cooling water heat pump unit in parallel. The hot water circulation pipeline is connected to each water-using equipment to form a water circulation loop, and a hot water pump is also provided on the water circulation loop.
2. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 1 is characterized in that: The exhaust air heat pump unit, the gushing water heat pump unit and the circulating cooling water heat pump unit are all assembled from a condenser, a compressor, an oil separator and an evaporator.
3. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 1 is characterized in that: The water-using equipment comprises a fresh air heating box, a fan coil unit and a radiator which are sequentially connected in parallel with the hot water circulation pipeline through pipelines.
4. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 2 is characterized in that: The water-using equipment comprises a heat extraction box using exhausted air, a defrost passage of which is connected to a hot water circulation pipeline through a pipeline, and an electric heater for defrosting is also arranged on the inlet pipeline of the defrost passage.
5. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 4 is characterized in that: The refrigerant channel of the exhaust air heat extraction box is connected to the evaporator of the exhaust air heat pump unit through a low-temperature refrigerant circulation pipeline.
6. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 5 is characterized in that: A low-temperature refrigerant pump is also provided on the low-temperature refrigerant circulation pipeline between the exhaust air heat extraction box and the exhaust air heat pump unit.
7. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 5, characterized in that: It also includes a low-temperature refrigerant system water replenishment tank and a low-temperature refrigerant system constant-pressure water replenishment device which are sequentially connected in series and connected to the low-temperature refrigerant circulation pipeline.
8. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 2 is characterized in that: It also includes a water gushing tank and a water gushing pump which are sequentially connected in series and connected to the water gushing heat exchange pipeline of the evaporator in the water gushing heat pump unit.
9. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 2, characterized in that: It also includes a circulating cooling water pump arranged on a cooling water circulation pipeline of an evaporator in a circulating cooling water heat pump unit.
10. The multi-heat source coupled heat pump system for recovering waste heat from coal mines according to claim 2, characterized in that: It also includes a hot water system water replenishment tank and a hot water system constant pressure water replenishment device which are sequentially connected in series and connected to the hot water circulation pipeline.