Low-temperature water and heat pump coupled multiple heat source shaft freezing prevention system

Abstract

The utility model relates to low temperature water and heat pump coupling multiple heat source well shaft anti -freezing system for heating the fresh air to enter the mine, its characterized in that, including: first heat source part, it sets up in the water storage pool department of mine, and the first heat transfer medium is stored in the water storage pool, as first heat transfer medium, heat pump part is connected in the first heat source part, the heat pump working medium that circulates in the heat pump part can directly or indirectly with first heat transfer medium heat exchange, and can with heat supply medium heat exchange, and air inlet heating part sets up in the air inlet well department of mine, air inlet heating part is connected in the first heat source part with heat pump part, for making from the first heat transfer medium of first heat source part and / or the heat supply medium that has carried out heat exchange in the heat pump part with the fresh air heat exchange, thereby heating the fresh air.

Description

Technical Field

[0001] This utility model relates to the field of mine waste heat utilization, and in particular to a low-temperature water and heat pump coupled with multiple heat sources shaft antifreeze system for exchanging heat with mine fresh air. Background Technology

[0002] Mines contain a large amount of waste heat, including waste heat from mine return air, mine water, and domestic sewage. For example, mine water waste heat resources are characterized by stable sources, abundant total amount, and small temperature fluctuations, making them renewable resources with both environmental value and energy potential. The heat from the mine water can be recovered and used for heating and cooling.

[0003] There are also some drawbacks to the utilization of waste heat from mine water: as a low-grade heat energy source, mine water temperature is mostly between 10-20℃, which cannot meet the anti-freezing requirements of mine shafts in extremely cold regions; due to the complex water quality of mine water containing various impurities, such as suspended matter, parasitic bacteria, and various trace electrochemical ions, it is easy to cause blockage and corrosion of heat exchange equipment; the heating capacity of mine water is closely tied to mine production, and its heating stability may be affected when the mine stops production, reduces production, or experiences short-term fluctuations in water volume. Utility Model Content

[0004] Problems to be solved by the utility model

[0005] In existing technologies, the heating capacity of mine water waste heat is affected by many factors, resulting in unstable heating. When the mine shaft antifreeze system exchanges heat with the fresh air, the fresh air supplied to the intake shaft may not reach the target temperature. Usually, the fresh air supplied to the intake shaft needs to reach above 2°C, otherwise it may easily cause safety accidents. When the heating capacity of mine water waste heat is insufficient, the mode of directly supplying heat using only mine water waste heat cannot meet the load demand. In addition, mine water contains many impurities, which can easily cause problems such as scouring, blockage and corrosion of heat exchange equipment.

[0006] Solution for solving the problem

[0007] A low-temperature water and heat pump coupled with multiple heat sources shaft antifreeze system is disclosed for heating fresh air entering a mine. The system comprises: a first heat source unit located at a water storage tank in the mine, storing a first heat exchange medium in the water storage tank; a heat pump unit connected to the first heat source unit, in which a heat pump working fluid flowing through the heat pump unit can directly or indirectly exchange heat with the first heat exchange medium and with a heating medium; and an air intake heating unit located at the air intake shaft of the mine, connected to the first heat source unit and the heat pump unit, for exchanging heat between the first heat exchange medium from the first heat source unit and / or the heating medium that has undergone heat exchange in the heat pump unit and the fresh air, thereby heating the fresh air.

[0008] The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system is characterized by further comprising: an indirect heating section, which is connected to the first heat source section, the heat pump section and the air inlet heating section, wherein a second heat exchange medium flowing in the indirect heating section can exchange heat with the first heat exchange medium and can exchange heat with the heat pump working fluid.

[0009] The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system is characterized by further comprising: a first circulation pipeline connecting the first heat source section to the air inlet heating section and used to supply the first heat exchange medium to the air inlet heating section; a second circulation pipeline connecting the first heat source section to the heat pump section and used to supply the first heat exchange medium to the heat pump section; and a third circulation pipeline connecting the heat pump section to the air inlet heating section and used to supply the heating medium to the air inlet heating section.

[0010] The low-temperature water and heat pump coupled multiple heat source wellbore antifreeze system is characterized by further comprising: a first regulating valve disposed in the water supply pipeline of the first circulation pipeline; a second regulating valve disposed in the water return pipeline of the first circulation pipeline; a third regulating valve disposed in the water supply pipeline of the second circulation pipeline; and a fourth regulating valve disposed in the water return pipeline of the second circulation pipeline.

[0011] The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system is characterized by further comprising: a fourth circulation pipeline connecting the first heat source section to the indirect heating section and used to supply the first heat exchange medium to the indirect heating section; a fifth circulation pipeline connecting the indirect heating section to the heat pump section and used to supply the second heat exchange medium to the heat pump section; and a sixth circulation pipeline connecting the indirect heating section and the air intake heating section and used to supply the second heat exchange medium to the air intake heating section.

[0012] The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system is characterized by further comprising: a fifth regulating valve, which is installed in the water supply pipeline of the fourth circulation pipeline; a sixth regulating valve, which is installed in the water supply pipeline of the fifth circulation pipeline; a seventh regulating valve, which is installed in the water return pipeline of the fifth circulation pipeline; an eighth regulating valve, which is installed in the water supply pipeline of the sixth circulation pipeline; and a ninth regulating valve, which is installed in the water return pipeline of the sixth circulation pipeline.

[0013] According to the aforementioned low-temperature water and heat pump coupled multiple heat source wellbore antifreeze system, the air intake heating unit includes a wellhead air heater, which is installed in the wellhead room connected to the air intake well.

[0014] According to the aforementioned low-temperature water and heat pump coupled multiple heat source wellbore antifreeze system, the heat pump section comprises an evaporator, a compressor, a condenser, and an expansion valve connected in series by a seventh circulation pipeline. The inlet of the evaporator on the heat source side is connected to the water supply pipelines of the second and fifth circulation pipelines, respectively, and the outlet of the evaporator on the heat source side is connected to the return water pipelines of the second and fifth circulation pipelines, respectively. Furthermore, the outlet and inlet of the evaporator on the heat pump working fluid side are connected to the water supply pipeline and return water pipeline of the seventh circulation pipeline, respectively. The inlet and outlet of the condenser on the heat pump working fluid side are connected to the water supply pipeline and return water pipeline of the seventh circulation pipeline, respectively, and the outlet and inlet of the condenser on the heating medium side are connected to the water supply pipeline and return water pipeline of the third circulation pipeline, respectively.

[0015] The low-temperature water and heat pump coupled multi-heat source well antifreeze system is characterized by further comprising: a second heat source section, which is connected to the air intake heating section via an eighth circulation pipeline, wherein a third heat exchange medium flowing in the second heat source section is transported to the air intake heating section via the eighth circulation pipeline, so that the third heat exchange medium exchanges heat with the fresh air.

[0016] The low-temperature water and heat pump coupled multiple heat source wellbore antifreeze system is characterized by further comprising: a tenth regulating valve, which is installed in the water supply pipeline of the eighth circulation pipeline; and an eleventh regulating valve, which is installed in the water return pipeline of the eighth circulation pipeline.

[0017] Effects of the utility model

[0018] The shaft antifreeze system of this invention couples multiple heat sources. When the shaft heating load is small, it utilizes only the waste heat from the mine water for direct heating, resulting in low operating costs. When the shaft heating load increases, it adopts a combined heating mode of direct heating from the mine water waste heat and heat pump units to bear part of the load, or it can rely entirely on heat pump units for heating. This achieves safe, stable, and efficient operation of the shaft antifreeze system under different load demands. It fully utilizes low-cost mine water waste heat resources to reduce heating energy consumption and maximize the utilization value of mine water waste heat, while ensuring heating demand and guaranteeing that the fresh air supplied to the intake shaft reaches the target temperature, balancing economy and stability. Furthermore, when the mine water quality does not meet requirements, indirect heating is achieved through an indirect heating section, preventing mine water from entering heat exchange equipment such as the heat pump section and causing scouring, blockage, and corrosion. Attached Figure Description

[0019] Figure 1This is a schematic diagram illustrating the low-temperature water and heat pump coupled with multiple heat source wellbore antifreeze system involved in this embodiment in the combined operation mode of mine water waste heat and heat pump heating.

[0020] Figure 2 This is a schematic diagram illustrating the low-temperature water and heat pump coupled with multiple heat sources wellbore antifreeze system according to this embodiment in the mine water waste heat supply mode.

[0021] Figure 3 This is a schematic diagram illustrating the low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system involved in this embodiment under heat pump heating mode. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] <Example>

[0024] The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system involved in this embodiment couples multiple different types of heat sources. Depending on the quality of the first heat exchange medium in the water storage tank and the system's requirements for the medium, it can provide direct heating mode and indirect heating mode (i.e., primary heat exchange) of mine water. By combining the heat pump unit heating method, it can provide multiple different heating modes. According to the changes in heating load and the quality of mine water, the operating mode can be flexibly adjusted, so as to take into account economy, stability and safety when heating the fresh air of the mine.

[0025] like Figure 1 As shown, a low-temperature water and heat pump coupled with multiple heat source shaft antifreeze system is used to heat the fresh air entering the mine. It includes: a first heat source 1, which is located at the mine's water storage tank 101 and stores a first heat exchange medium in the water storage tank; a heat pump 2, which is connected to the first heat source 1, and the heat pump working fluid flowing in the heat pump 2 can directly or indirectly exchange heat with the first heat exchange medium and can also exchange heat with the heating medium from the air intake heating unit 3; and an air intake heating unit 3, which is located at the mine's air intake shaft 6 and is connected to the first heat source 1 and the heat pump 2, for exchanging heat between the first heat exchange medium from the first heat source 1 and / or the heating medium that has undergone heat exchange in the heat pump 2 and the fresh air, thereby heating the fresh air.

[0026] Specifically, in this embodiment, the first heat source unit 1 can store water resources with waste heat, such as mine water and domestic sewage (hereinafter collectively referred to as mine water), as the first heat exchange medium in a water storage tank, and can circulate the first heat exchange medium to exchange heat with other media. The heat pump unit 2 consumes a small amount of electrical energy to drive the heat pump working fluid to circulate within the system, so that the heat pump working fluid further exchanges heat with the first heat exchange medium from the first heat source unit 1, and after the heat pump unit does work, the temperature of the heat pump working fluid is further increased, and then it exchanges heat with the heating medium from the air intake heating unit 3. Among them, the heat pump working fluid (also known as refrigerant) is the working medium in the heat pump unit that realizes heat transfer through phase change (evaporation to absorb heat, condensation to release heat), such as ammonia, water, carbon dioxide and other refrigerants.

[0027] In this embodiment, the low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system can provide three heating modes: direct heating mode of mine water waste heat, combined heating mode of mine water waste heat and heat pump, and heating mode of heat pump. Specific details are as follows.

[0028] Combined heating mode of mine water waste heat and heat pump, such as Figure 1 As shown, when the heating load increases, not only the first heat exchange medium is used, but also the heat pump working fluid of the heat pump unit is used to heat the heating medium from the air intake heating unit 3, so that the heated heating medium can then heat the fresh air, thereby enabling the heat pump unit to bear part of the heating load.

[0029] direct heating mode of mine water waste heat, such as Figure 2 As shown, when the heating load is small, the first heat exchange medium (i.e., mine water, domestic sewage, etc.) is used to heat the fresh air. In this heating mode, the waste heat of the mine water is mainly used for heating, which reduces intermediate energy conversion links (e.g., the energy consumption of not needing to operate a heat pump), resulting in lower energy loss. Moreover, the long-term operating cost is much lower than that of coal-fired, gas-fired, or electric heating, and it can reduce the cost of waste heat emission treatment and reduce pollutant emissions.

[0030] Heat pump heating mode such as Figure 3 As shown, when the heating load increases further, such as when the heating load far exceeds the heating capacity of the mine water waste heat, or when the mine water waste heat fluctuates greatly, the heat pump unit can be fully utilized to provide heat and bear the entire heating load of the low-temperature water and heat pump coupled with multiple heat source wellbore antifreeze system.

[0031] The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system provided by this utility model can switch between different heating modes, thereby enabling real-time flexible adjustment according to the heat load demand and heat source status in the mine wellbore. It can give full play to the advantages of each heat source, both by utilizing the waste heat of the mine to reduce operating costs and thus maximizing the utilization value of the waste heat of the mine water, and by using heat pump units to meet the heat load demand under high heating load conditions. This ensures that the fresh air delivered to the intake air shaft reaches the target temperature, taking into account both economy and reliability, and improving the comprehensive energy utilization rate, adapting to complex working conditions, and ensuring the antifreeze effect on the mine wellbore.

[0032] like Figure 1 As shown, the low-temperature water and heat pump coupled multi-heat source well antifreeze system in this embodiment also includes: an indirect heating section 5, which is connected to the first heat source section 1, the heat pump section 2 and the air intake heating section 3. The second heat exchange medium flowing in the indirect heating section 5 can exchange heat with the first heat exchange medium, and the second heat exchange medium can be transported to the heat pump section 2 to exchange heat with the heat pump working fluid flowing in the heat pump section 2.

[0033] Due to the complex nature of mine water, it contains various impurities, such as suspended matter like coal, silt, oil, and viscous substances, various chlorides and salts, parasitic and epiphytic bacteria, and trace amounts of various electrochemical ions (e.g., Ca). 2+ Mg 2+ Na + K + SO3 2- HCO3 - CO3 2- (e.g., excessive heat) can easily cause scouring, wear, and corrosion of heat exchange equipment, especially the evaporator and condenser of the heat pump section, resulting in severe scouring and wear and affecting the lifespan of the heat pump equipment. In such cases, an indirect heating mode is adopted.

[0034] In this embodiment, the activation or deactivation of the indirect heating unit 5 is controlled based on whether the water quality of the first heat exchange medium meets the requirements, thereby allowing the low-temperature water and heat pump coupled with multiple heat sources wellbore antifreeze system to switch between two modes: direct heat exchange with mine water and indirect heat exchange with mine water. Specific details are as follows.

[0035] If the water quality of the first heat exchange medium meets the requirements, the indirect heating section 5 is shut down, and the first heat exchange medium is not supplied to the indirect heating section 5. The first heat exchange medium is then supplied to the heat pump section 2 and / or the air intake heating section 3 for direct heat exchange with the heat pump working fluid of the heat pump section 2 and / or the heating medium of the air intake heating section 3.

[0036] When the water quality of the first heat exchange medium does not meet the requirements, the indirect heating section 5 is activated. The first heat exchange medium flowing in the first heat source section 1 first exchanges heat with the second heat exchange medium in the indirect heating section 5, and then exchanges heat with the heat pump working medium of the heat pump section 2 and / or the heating medium of the air intake heating section 3 through the second heat exchange medium, thereby realizing indirect heat exchange of the first heat exchange medium. In the indirect heating section 5, the first heat exchange medium and the second heat exchange medium do not come into direct contact, but flow separately through a partition wall. After completing the heat exchange in the indirect heating section 5, the first heat exchange medium returns to the first heat source section 1. That is, the first heat exchange medium only circulates between the first heat source section 1 and the indirect heating section 5, and does not enter the heat pump section 2 and the air intake heating section 3, thus avoiding scouring, wear and corrosion of the heat exchange equipment of the heat pump section 2 and the air intake heating section 3.

[0037] like Figure 1 As shown, the low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system in this embodiment further includes: a first circulation pipeline (including a water supply pipeline 401a and a return pipeline 401b), which connects the first heat source unit 1 to the air intake heating unit 3 and is used to supply the first heat exchange medium to the air intake heating unit 3; a second circulation pipeline (including a water supply pipeline 402a and a return pipeline 402b), which connects the first heat source unit 1 to the heat pump unit 2 and is used to supply the first heat exchange medium to the heat pump unit 2; and a third circulation pipeline (including a water supply pipeline 403a and a return pipeline 403b), which connects the heat pump unit 2 to the air intake heating unit 3 and is used to supply the first heat exchange medium to the heat pump unit 2; and a third circulation pipeline (including a water supply pipeline 403a and a return pipeline 403b), which connects the heat pump unit 2 to the air intake heating unit 3 and is used to supply the first heat exchange medium to the heat pump unit 3. A heating medium is supplied to the air intake heating unit 3; a fourth circulation pipeline (including a water supply pipeline 404a and a return water pipeline 404b) connects the first heat source unit to the indirect heating unit 5 and is used to supply the first heat exchange medium to the indirect heating unit 5; a fifth circulation pipeline (including a water supply pipeline 405a and a return water pipeline 405b) connects the indirect heating unit 5 to the heat pump unit 2 and is used to supply the second heat exchange medium to the heat pump unit 2; and a sixth circulation pipeline (including a water supply pipeline 406a and a return water pipeline 406b) connects the indirect heating unit 5 and the air intake heating unit 3 and is used to supply the second heat exchange medium to the air intake heating unit 3.

[0038] Furthermore, such as Figure 1As shown, the low-temperature water and heat pump coupled with multiple heat sources wellbore antifreeze system in this embodiment further includes: a first regulating valve F1 and a second regulating valve F2, wherein the first regulating valve F1 is installed in the water supply pipeline 401a of the first circulation pipeline, and the second regulating valve F2 is installed in the water return pipeline 401b of the first circulation pipeline; a third regulating valve F3 and a fourth regulating valve F4, wherein the third regulating valve F3 is installed in the water supply pipeline 402a of the second circulation pipeline, and the fourth regulating valve F4 is installed in the water return pipeline 402b of the second circulation pipeline; a fifth regulating valve F5, which is installed in the water supply pipeline 404a of the fourth circulation pipeline; a sixth regulating valve F6, which is installed in the water supply pipeline 405a of the fifth circulation pipeline; a seventh regulating valve F7, which is installed in the water return pipeline 405b of the fifth circulation pipeline; an eighth regulating valve F8, which is installed in the water supply pipeline 406a of the sixth circulation pipeline; and a ninth regulating valve F9, which is installed in the water return pipeline 406b of the sixth circulation pipeline. Among them, each regulating valve is preferably an electric regulating valve. The above regulating valves will be referred to as F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, and F11 respectively.

[0039] In this embodiment, switching between different heating modes can be achieved by controlling the opening degree of each regulating valve. For example, with only F1 and F2 open, the mode switches to direct heating mode using waste heat from the mine water. With only F1, F2, F3, and F4 open, the mode switches to combined heating mode using waste heat from the mine water and a heat pump, allowing both to operate together. In this mode, adjusting the opening degree of valves F1, F2, F3, and F4 adjusts the load on each of the waste heat from the mine water and the heat pump unit. With only F3 and F4 open, the mode switches to heating mode using the heat pump unit.

[0040] like Figure 1-3 As shown, in this embodiment, by controlling the opening degree of each regulating valve, it is possible to switch between the direct heating mode and the indirect heating mode of mine water.

[0041] like Figure 1As shown, the direct mine water heating mode includes multiple combined operation modes. For example, when F1, F2, F3, and F4 are open and F5, F6, F7, F8, F9, F10, and F11 are closed, the first combined operation mode of the direct mine water waste heat heating mode is switched to. In this condition, the mine water waste heat and the heat pump operate together. The heating load of the mine water waste heat and the heat pump are adjusted by adjusting the opening of F1 and F3 of the water supply pipeline and the opening of F2 and F4 of the return water pipeline. With F1, F2, F3, F4, F10, and F11 open and F5, F6, F7, F8, and F9 closed, the system switches to the second combined operation mode under the direct heating mode of mine water waste heat. In this mode, mine water waste heat, heat pump, and other heat sources operate in combination. The heating load of each of the mine water waste heat, heat pump, and other heat sources is adjusted by regulating the opening of F1, F3, and F10 in the water supply pipeline and the opening of F2, F4, and F11 in the return water pipeline.

[0042] like Figure 1 As shown, in the mine water indirect heating mode (the first heat exchange medium is heated after passing through the heat exchanger of the indirect heating section 5), there are also multiple combined operation modes. For example, when F1, F2, F3, F4, F10, and F11 are closed and F5, F6, F7, F8, and F9 are open, the first combined operation mode of the mine water waste heat indirect heating mode is switched to. The mine water waste heat and the heat pump operate together. The heating load of the mine water waste heat and the heat pump are adjusted by adjusting the opening of F6 and F8 of the water supply pipeline and the opening of F7 and F9 of the return water pipeline, respectively. With F1, F2, F3, and F4 closed and F5, F6, F7, F8, F9, F10, and F11 open, the system switches to the second combined operation mode under the indirect heating mode of mine water waste heat. In this mode, mine water waste heat, heat pump, and other heat sources operate in combination. The heating load of mine water waste heat, heat pump, and other heat sources is adjusted by regulating the opening of F6, F8, and F10 in the water supply pipeline and the opening of F7, F9, and F11 in the return water pipeline.

[0043] like Figure 2 As shown, when using waste heat from mine water and other heat sources for heating, there are two modes: direct mine water heating and indirect mine water heating. In the direct mine water heating mode, with F1 and F2 open and F5, F8, F9, F10, and F11 closed, it switches to direct heating mode one, using waste heat from the mine water for direct heating. With F1, F2, F10, and F11 open and F5, F8, and F9 closed, it switches to direct heating mode two. In this mode, waste heat from the mine water is coupled with other heat sources for combined heating. The heating load of the waste heat from the mine water and other heat sources is adjusted by regulating the opening degrees of F1 and F10 in the supply water pipeline and F2 and F11 in the return water pipeline.

[0044] like Figure 2 As shown, when using waste heat from mine water and other heat sources for heating, and in the indirect heating mode of mine water (heating after passing through the heat exchanger of indirect heat exchange section 5), with F5, F8, and F9 open and F1, F2, F10, and F11 closed, it switches to indirect heating operation mode one, in which waste heat from mine water is used for direct heating; with F5, F8, F9, F10, and F11 open and F1 and F2 closed, it switches to indirect heating operation mode two, in which waste heat from mine water is used in conjunction with other heat sources for combined heating.

[0045] like Figure 3 As shown, when using heat pump heating, with F3 and F4 open and F5, F6, and F7 closed, the system switches to direct heating mode, where mine water (i.e., the first heat exchange medium) is directly delivered to heat pump section 2 for heat exchange. With F3 and F4 closed and F5, F6, and F7 open, the system switches to indirect heating mode, where mine water is delivered to heat pump section 2 via indirect heat exchange section 5 for heat exchange.

[0046] like Figures 1 to 3 As shown, the air intake heating unit 3 includes a wellhead air heater 301 and a wellhead room 302. The wellhead room 302 is located above the air intake shaft 6 and is connected to the air intake shaft 6. The wellhead air heater 301 can be installed at the air inlet of the wellhead room 302. After the wellhead air heater 301 heats the fresh air, the fresh air that reaches the target temperature enters the air intake shaft 6 through the wellhead room 302, thereby achieving antifreeze protection for the shaft of the air intake shaft.

[0047] like Figure 1 and Figure 3 As shown, the heat pump unit 2 includes an evaporator 201, a compressor 202, a condenser 203, and an expansion valve 204, which are connected in series by a seventh circulation pipeline (including a supply water pipeline 407a and a return water pipeline 407b). The heat source side inlet of the evaporator 201 is connected to the supply water pipeline 402a of the second circulation pipeline and the supply water pipeline 405a and return water pipeline 405b of the fifth circulation pipeline, respectively. The heat source side outlet of the evaporator 201 is connected to the return water pipeline 402b of the second circulation pipeline and the return water pipeline 405b of the fifth circulation pipeline, respectively. The heat pump working fluid side outlet and inlet of the evaporator 201 are connected to the supply water pipeline 407a and the return water pipeline 407b of the seventh circulation pipeline, respectively. Furthermore, the inlet and outlet of the heat pump working fluid side of the condenser 203 are respectively connected to the water supply pipe 407a and the return pipe 407b of the seventh circulation pipe, and the outlet and inlet of the heating medium side of the condenser 203 are respectively connected to the water supply pipe 403a and the return pipe 403b of the third circulation pipe.

[0048] The media flowing in each circulation pipeline only exchange heat and do not mix. In this embodiment, the media flowing in the first circulation pipeline is the first heat exchange medium supplied from the first heat source section 1 to the air intake heating section 3; the media flowing in the second circulation pipeline is the first heat exchange medium supplied from the first heat source section 1 to the heat pump section 2; the media flowing in the third circulation pipeline is the heating medium supplied from the heat pump section 2 to the air intake heating section 3; the media flowing in the fourth circulation pipeline is the first heat exchange medium supplied from the first heat source section 1 to the indirect heating section 5; the media flowing in the fifth circulation pipeline is the second heat exchange medium supplied from the indirect heating section 5 to the heat pump section 2; the media flowing in the sixth circulation pipeline is the second heat exchange medium supplied from the indirect heating section 5 to the air intake heating section 3; and the media flowing in the seventh circulation pipeline is the heat pump working fluid, which exchanges heat with the first or second heat exchange medium in the evaporator 201 and with the heating medium in the condenser 203.

[0049] Specifically, in this embodiment, the heat exchange process of the heat pump unit 2 includes: the heat pump working fluid absorbs the heat energy provided by the first heat exchange medium or the second heat exchange medium in the evaporator 201 and evaporates, changing from a liquid state to a gaseous state; the evaporated heat pump working fluid is drawn into and compressed by the compressor 202 in the form of vapor, and the heat pump working fluid is further compressed into high-temperature and high-pressure vapor; subsequently, the high-temperature and high-pressure vapor heat pump working fluid is transported to the heat pump working fluid side of the condenser, and the vapor heat pump working fluid is further condensed into a liquid state in the condenser. During this process, the heat pump working fluid releases a large amount of heat energy and transfers it to the heating medium (e.g., water or ethylene glycol aqueous solution), thereby increasing the temperature of the heating medium; furthermore, the condensed liquid heat pump working fluid expands and throttles through the expansion valve 204, and the pressure and temperature of the heat pump working fluid decrease, so that its pressure and temperature drop to the low-pressure state required by the evaporator 201, creating conditions for the heat pump working fluid to efficiently absorb heat and evaporate in the evaporator.

[0050] like Figures 1 to 3 As shown, the low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system also includes a circulating water pump, with a circulating water pump installed in at least one of the circulating pipelines. For example, as Figure 1 As shown, a first circulation pump P1 is installed in the circulation pipeline connected to the outlet of the water storage tank 101; a second circulation pump P2 is installed in the return water pipeline 405b of the fifth circulation pipeline; and a third circulation pump P3 is installed in the return water pipeline 403b of the third circulation pipeline. The main function of the circulation pumps is to drive the various media to continuously circulate in the closed pipeline through the centrifugal force or pressure difference generated by the rotation of the impeller, ensuring the effective transfer and distribution of heat or cold, optimizing the heat exchange efficiency within the system, and ensuring the efficient and stable operation of the circulation system.

[0051] like Figure 1 and Figure 2As shown, the low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system also includes a second heat source section 7, which is connected to the air intake heating section 3 via an eighth circulation pipeline (including a supply water pipeline 408a and a return water pipeline 408b). The third heat exchange medium flowing in the second heat source section 7 is transported to the air intake heating section 3 via the eighth circulation pipeline to exchange heat with the fresh air. Specifically, the second heat source section 7 can be a supplementary heat source other than waste heat from mine water and / or domestic sewage, such as waste heat from building heating or waste heat from air compressors, etc. The system includes a tenth regulating valve F10, which is installed in the supply water pipeline 408a of the eighth circulation pipeline; and an eleventh regulating valve F11, which is installed in the return water pipeline 408b of the eighth circulation pipeline. By adjusting the opening of the tenth regulating valve F10 and the eleventh regulating valve F11, the load on the second heat source section 7 can be adjusted.

[0052] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A low-temperature water and heat pump coupled with multiple heat sources wellbore antifreeze system, used to heat fresh air entering the mine, characterized in that, include: The first heat source is located at the water storage tank of the mine and stores the first heat exchange medium in the water storage tank; A heat pump section is connected to the first heat source section. The heat pump working fluid flowing in the heat pump section can directly or indirectly exchange heat with the first heat exchange medium and can also exchange heat with the heating medium. as well as An air intake heating unit is provided at the air intake shaft of the mine. The air intake heating unit is connected to the first heat source unit and the heat pump unit, and is used to heat the fresh air by exchanging heat between the first heat exchange medium from the first heat source unit and / or the heating medium that has undergone heat exchange in the heat pump unit.

2. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 1, characterized in that, Also includes: An indirect heating section is connected to the first heat source section, the heat pump section, and the air inlet heating section. The second heat exchange medium flowing in the indirect heating section can exchange heat with the first heat exchange medium and with the heat pump working fluid.

3. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 2, characterized in that, Also includes: The first circulation pipeline connects the first heat source section to the air inlet heating section and is used to deliver the first heat exchange medium to the air inlet heating section. A second circulation pipeline connects the first heat source section to the heat pump section and is used to supply the first heat exchange medium to the heat pump section; and The third circulation pipeline connects the heat pump section to the air intake heating section and is used to supply the heating medium to the air intake heating section.

4. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 3, characterized in that, Also includes: The first regulating valve is installed in the water supply pipeline of the first circulation pipeline; The second regulating valve is installed in the return water pipe of the first circulation pipe; A third regulating valve is installed in the water supply line of the second circulation pipeline; and The fourth regulating valve is located in the return water pipe of the second circulation pipe.

5. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 3, characterized in that, Also includes: The fourth circulation pipeline connects the first heat source section to the indirect heating section and is used to deliver the first heat exchange medium to the indirect heating section. A fifth circulation pipeline connects the indirect heating section to the heat pump section and is used to supply the second heat exchange medium to the heat pump section; and The sixth circulation pipeline connects the indirect heating section and the air inlet heating section, and is used to deliver the second heat exchange medium to the air inlet heating section.

6. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 5, characterized in that, Also includes: The fifth regulating valve is installed in the water supply pipeline of the fourth circulation pipeline; The sixth regulating valve is installed in the water supply pipeline of the fifth circulation pipeline; The seventh regulating valve is installed in the return water pipe of the fifth circulation pipe; The eighth regulating valve is installed in the water supply line of the sixth circulation pipeline; and The ninth regulating valve is located in the return water pipe of the sixth circulation pipe.

7. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 1, characterized in that, The air intake heating unit includes a wellhead air heater, which is installed in the wellhead room connected to the air intake well.

8. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 5, characterized in that, The heat pump section includes an evaporator, a compressor, a condenser, and an expansion valve, which are connected in series by a seventh circulation pipeline. The heat source side inlet of the evaporator is connected to the water supply pipe of the second circulation pipe and the water supply pipe of the fifth circulation pipe, respectively; the heat source side outlet of the evaporator is connected to the return water pipe of the second circulation pipe and the return water pipe of the fifth circulation pipe, respectively; and the heat pump working fluid side outlet and inlet of the evaporator are connected to the water supply pipe and return water pipe of the seventh circulation pipe, respectively. The inlet and outlet of the heat pump working fluid side of the condenser are respectively connected to the water supply pipeline and the water return pipeline of the seventh circulation pipeline, and the outlet and inlet of the heating medium side of the condenser are respectively connected to the water supply pipeline and the water return pipeline of the third circulation pipeline.

9. The low-temperature water and heat pump coupled with multiple heat sources wellbore antifreeze system according to any one of claims 1-8, characterized in that, Also includes: The second heat source section is connected to the air intake heating section via the eighth circulation pipe. The third heat exchange medium flowing in the second heat source section is transported to the air intake heating section via the eighth circulation pipe so that the third heat exchange medium exchanges heat with the fresh air.

10. The low-temperature water and heat pump coupled multi-heat source wellbore antifreeze system according to claim 9, characterized in that, Also includes: The tenth regulating valve is installed in the water supply pipeline of the eighth circulation pipeline; as well as The eleventh regulating valve is located in the return water pipe of the eighth circulation pipe.

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