A deep mine waste heat utilization and low dew point rotary dehumidification and cooling system

Abstract

The present invention discloses a deep mine waste heat utilization and low-dew-point rotary dehumidification and cooling system, comprising a heat pump unit, an air handling unit, a water gushing unit, and a heat exchange unit, all of which are connected to the heat pump unit. The air handling unit comprises a pretreatment unit, an air-to-water heat exchange unit, a temperature treatment unit, a humidity treatment unit, and an air supply unit, the pretreatment unit being connected to the temperature treatment unit, the temperature treatment unit comprising a multi-stage evaporator, the humidity treatment unit comprising a multi-stage dehumidifier, the air supply unit discharging treated mine airflow into the mine working face, and the air-to-water heat exchange unit being located on a side of the humidity treatment unit away from the pretreatment unit. The air-to-water heat exchange unit of the present invention forms a circulation loop with a first condenser, which continuously supplies high-temperature cooling water to the air-to-water heat exchange unit, thereby reducing the heating energy consumption of the regenerated air and solving the problem of high regeneration energy consumption in the rotary dehumidification system.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidification and cooling in deep mines, and in particular to a deep mine waste heat utilization and low dew point rotary dehumidification and cooling system. Background Art

[0002] Deep mining in mines has serious problems of high temperature and high humidity. The high temperature and high humidity mine environment directly affects the health of underground workers. In addition, it will deteriorate the mechanical properties of the surrounding rock and cause instability of the support structure and equipment. Mine water is usable mine waste heat. By increasing the heat of mine water, the demand for heat in coal mines can be met. At present, deep high temperature and high humidity heat damage is mainly cooled by the steam compression refrigeration cycle principle. The traditional mine cooling and dehumidification system has the problems of poor cooling effect, large cold loss in long-distance transportation, insufficient dehumidification capacity and high energy consumption. In modern industry, As an alternative to traditional cooling systems, wet air conditioning systems have been widely used in deep cooling and dehumidification. Rotary dehumidification systems have the advantages of independent control of temperature and humidity, large dehumidification capacity and low-grade thermal energy utilization. Two-stage rotary dehumidification systems are suitable for deep dehumidification occasions with high air humidity and low dew point requirements. However, the regeneration side of the rotary dehumidification system needs to heat the regenerated air to desorb and analyze the desiccant material. Therefore, high regeneration energy consumption is a major problem of traditional rotary dehumidification systems. In order to solve the shortcomings of existing mine cooling and dehumidification systems, it is necessary to study a deep mine waste heat utilization and low dew point rotary dehumidification and cooling system. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a deep mine waste heat utilization and low dew point rotary dehumidification and cooling system. The air-water heat exchange unit of the present invention forms a circulation loop with the first condenser. The first condenser continuously supplies high-temperature cooling water to the air-water heat exchange unit, so that the air-water heat exchange unit heats up the regenerated air entering the humidity treatment unit, so that the high-temperature regenerated air regenerates the desiccant material of the humidity treatment unit, thereby reducing the heating energy consumption of the regenerated air and solving the problem of high regeneration energy consumption of the rotary dehumidification system.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a deep mine waste heat utilization and low dew point rotary dehumidification and cooling system, comprising a heat pump unit, an air handling unit, a water gushing unit and a heat exchanger unit, the air handling unit, the water gushing unit and the heat exchanger unit are all connected to the heat pump unit; the air handling unit comprises a pretreatment unit, an air-water heat exchange unit, a temperature treatment unit, a humidity treatment unit and an air supply unit, the pretreatment unit is connected to the temperature treatment unit and sends the mine air flow into the temperature treatment unit, the temperature treatment unit comprises a multi-stage evaporator, the humidity treatment unit comprises a multi-stage dehumidifier, and an evaporator is provided on the front and rear sides of each stage of the dehumidifier, the temperature treatment unit and the humidity treatment unit perform multi-stage cooling and dehumidification on the mine air flow and then send the mine air flow into the air supply unit, the air supply unit discharges the treated mine air flow into the mine working face, the air-water heat exchange unit is arranged at the humidity treatment unit The side of the unit away from the pretreatment unit is convenient for pretreatment of the airflow entering the humidity treatment unit; the refrigerant outlet of the heat pump unit is connected to the refrigerant inlet of the temperature treatment unit for conveying refrigerant to the temperature treatment unit, and the refrigerant inlet of the heat pump unit is connected to the refrigerant outlet of the temperature treatment unit for the heat pump unit to reprocess the refrigerant output by the temperature treatment unit, the first water outlet of the heat pump unit is connected to the water inlet of the air-water heat exchange unit for conveying high-temperature cooling water to the air-water heat exchange unit, the first water inlet of the heat pump unit is connected to the water outlet of the air-water heat exchange unit for the heat pump unit to reprocess the cooling return water output by the air-water heat exchange unit, the second water inlet of the heat pump unit is connected to the water outlet of the water gushing unit for the heat pump unit to transfer energy between the heat pump unit and the mine water gushing, and the second water outlet of the heat pump unit is connected to the heat exchange unit for the heat pump unit to convey the high-temperature water gushing to the heat exchange unit.

[0005] Preferably, the heat pump unit includes an expansion valve, a first condenser, a second condenser, a bypass valve and a compressor, the refrigerant inlet of the compressor is connected to the refrigerant outlet of the temperature treatment unit, the refrigerant outlet of the compressor is connected to the refrigerant inlet of the second condenser, the refrigerant outlet of the second condenser is connected to the refrigerant inlet of the first condenser, the refrigerant outlet of the first condenser is connected to the refrigerant inlet of the expansion valve, the refrigerant outlet of the expansion valve is connected to the refrigerant inlet of the temperature treatment unit, and the bypass valve is connected in parallel with the second condenser to control the flow rate and pressure of the refrigerant in the pipeline.

[0006] Preferably, the pretreatment unit includes an air filter and a surface cooler, and the air outlet of the air filter is connected to the air inlet of the surface cooler; the temperature treatment unit includes a first evaporator, a second evaporator and a third evaporator, the refrigerant inlet of the first evaporator is the refrigerant inlet of the temperature treatment unit, the refrigerant outlet of the first evaporator is connected to the refrigerant inlet of the second evaporator, the refrigerant outlet of the second evaporator is connected to the refrigerant inlet of the third evaporator, and the refrigerant outlet of the third evaporator is the refrigerant outlet of the temperature treatment unit.

[0007] Preferably, a first condensate tray is provided at the bottom of the first evaporator, and a second condensate tray is provided at the bottom of the second evaporator. The water outlet of the first condensate tray and the water outlet of the second condensate tray are both connected to the water inlet of the surface cooler.

[0008] Preferably, the humidity processing unit includes a two-partition rotary dehumidifier and a three-partition rotary dehumidifier, the two-partition rotary dehumidifier is arranged between the first evaporator and the second evaporator, and the three-partition rotary dehumidifier is arranged between the second evaporator and the third evaporator. The two-partition rotary dehumidifier is provided with a first partition, which divides the two-partition rotary dehumidifier into a processing zone and a regeneration zone. The three-partition rotary dehumidifier is provided with a second partition, which divides the three-partition rotary dehumidifier into a processing zone, a purge zone and a regeneration zone.

[0009] Preferably, the air-water heat exchange unit includes a regeneration fan, a first air-water heat exchanger and a second air-water heat exchanger, the air inlet of the regeneration fan is connected to the air outlet of the purge zone of the three-partition rotary dehumidifier, the air outlet of the regeneration fan is connected to the air inlet of the first air-water heat exchanger, the air outlet of the first air-water heat exchanger is connected to the air inlet of the regeneration zone of the three-partition rotary dehumidifier, the air outlet of the regeneration zone of the three-partition rotary dehumidifier is connected to the air inlet of the second air-water heat exchanger, the air outlet of the second air-water heat exchanger is connected to the air inlet of the regeneration zone of the two-partition rotary dehumidifier, and the air outlet of the regeneration zone of the two-partition rotary dehumidifier discharges regeneration exhaust air.

[0010] Preferably, a converging air valve is provided on the connecting pipeline between the air outlet of the surface cooler and the air inlet of the first evaporator, the air inlet of the converging air valve is respectively connected to the air outlet of the surface cooler and the air outlet of the regeneration zone of the two-zone rotary dehumidifier, and the air outlet of the converging air valve is connected to the air inlet of the first evaporator; a diverter air valve is provided on the connecting pipeline between the second evaporator and the three-zone rotary dehumidifier, the air inlet of the diverter air valve is connected to the air outlet of the second evaporator, and the air outlet of the diverter air valve is respectively connected to the air inlet of the treatment zone of the three-zone rotary dehumidifier and the air inlet of the purge zone of the three-zone rotary dehumidifier.

[0011] Preferably, the air-water heat exchange unit is connected to the heat pump unit through a water supply circuit and a return water circuit. The water supply circuit is connected to the first water outlet of the heat pump unit and the water inlet of the air-water heat exchange unit. The return water circuit is connected to the water outlet of the air-water heat exchange unit and the first water inlet of the heat pump unit. A third diversion water valve is provided on the water supply circuit, and a converging water valve, a return water tank and a return water pump are provided on the return water circuit in sequence from the air-water heat exchange unit to the heat pump unit.

[0012] Preferably, the water gushing unit includes water treatment equipment and a water gushing tank. The water treatment equipment treats the mine water gushing and sends it into the water gushing tank. The water gushing tank sends the aqueous solution into the heat pump unit through the second water inlet of the heat pump unit.

[0013] Preferably, the heat exchanger unit includes a gushing water pump, a heat exchanger for wellbore antifreeze, a heat exchanger for domestic hot water and a heat exchanger for building heating. The water inlet of the gushing water pump is connected to the second water outlet of the heat pump unit, and the water outlet of the gushing water pump is connected to the heat exchanger for wellbore antifreeze, the heat exchanger for domestic hot water and the heat exchanger for building heating through pipelines. A first diverter water valve is provided at the water inlet of the heat exchanger for wellbore antifreeze, and a second diverter water valve is provided at the water inlet of the heat exchanger for building heating.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The air-water heat exchange unit of the present invention forms a circulation loop with the first condenser. The first condenser continuously supplies high-temperature cooling water to the air-water heat exchange unit, which facilitates the air-water heat exchange unit to heat the regeneration air entering the humidity treatment unit. The high-temperature regeneration air regenerates the desiccant material in the humidity treatment unit, reducing the heating energy consumption of the regeneration air and solving the problem of high regeneration energy consumption in the rotary dehumidification system.

[0016] 2. The temperature processing unit of the present invention includes a three-stage evaporator connected in series, and the humidity processing unit includes a two-stage dehumidifier. The three-stage evaporator is used to deeply cool the mine airflow, and the two-stage dehumidifier is used to deeply dehumidify the mine airflow, thereby achieving deep dehumidification and deep cooling of the high-temperature and high-humidity airflow in the mine, meeting the thermal comfort of the operators and improving work efficiency.

[0017] 3. In the present invention, the condensate from the first evaporator flows into the first condensate pan, and the condensate from the second evaporator flows into the second condensate pan. The condensate in the first condensate pan and the second condensate pan is sent to the surface cooler as the cold source of the surface cooler, thereby improving the cooling efficiency and energy utilization rate of the unit.

[0018] 4. The mine water of the present invention becomes high-temperature water after heat exchange through the second condenser. The high-temperature water provides heat for the heat exchanger for shaft antifreeze, domestic hot water and building heating, thereby improving energy utilization.

[0019] The present invention is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram of the structure of the heat pump unit of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the air handling unit of the present invention.

[0023] Description of the accompanying drawings:

[0024] 01—heat pump unit; 02—air handling unit; 03—water gushing unit;

[0025] 04—heat exchange unit; 05—heat exchanger for wellbore antifreeze;

[0026] 06—Heat exchanger for domestic hot water; 07—Heat exchanger for building heating;

[0027] 1—on-well fan; 2—on-well air-water heat exchanger;

[0028] 3—First diversion valve; 4—Second diversion valve; 5—Water pump;

[0029] 6—Water treatment equipment; 7—Water inflow tank; 8—Return water pump;

[0030] 9—Return water tank 10—Third diversion valve; 11—Combining valve;

[0031] 12—Expansion valve; 13—First condenser; 14—Second condenser;

[0032] 15—Bypass valve; 16—Compressor; 17—Air filter;

[0033] 18 - surface cooler; 19 - first baffle; 20 - first evaporator;

[0034] 21—two-zone rotary dehumidifier; 21-1—processing area;

[0035] 21-2—regeneration zone; 22—second partition;

[0036] 23—second air-water heat exchanger; 24—second evaporator;

[0037] 25—Three-zone rotary dehumidifier; 25-1—Processing area;

[0038] 25-2—Purge zone; 25-3—Regeneration zone;

[0039] 26—first air-water heat exchanger 27—regeneration fan;

[0040] 28—third evaporator; 29—air supply fan;

[0041] 30—Combining air valve; 31—First condensate tray; 32—Second combining water valve;

[0042] 33—first belt; 34—first electric rotor; 35—second condensate tray;

[0043] 36—Diverter air valve; 37—Second belt; 38—Second electric rotor. DETAILED DESCRIPTION

[0044] like Figures 1 to 3 As shown, the present invention discloses a deep mine waste heat utilization and low dew point rotary dehumidification and cooling system, including a heat pump unit 01, an air handling unit 02, a water gushing unit 03 and a heat exchange unit 04, the air handling unit 02, the water gushing unit 03 and the heat exchange unit 04 are all connected to the heat pump unit 01; the air handling unit 02 includes a pretreatment unit, an air-water heat exchange unit, a temperature treatment unit, a humidity treatment unit and an air supply unit, the pretreatment unit is connected to the temperature treatment unit and sends the mine air flow into the temperature treatment unit, the temperature treatment unit includes a multi-stage evaporator, the humidity treatment unit includes a multi-stage dehumidifier, and an evaporator is provided on the front and back sides of each stage of the dehumidifier, the temperature treatment unit and the humidity treatment unit perform multi-stage cooling and dehumidification on the mine air flow and then send the mine air flow into the air supply unit, the air supply unit discharges the treated mine air flow into the mine working face, the air-water heat exchange unit is arranged on the side of the humidity treatment unit away from the pretreatment unit for pre-processing the airflow entering the humidity treatment unit; the refrigerant outlet of the heat pump unit 01 is connected to the refrigerant inlet of the temperature treatment unit for conveying refrigerant to the temperature treatment unit, the refrigerant inlet of the heat pump unit 01 is connected to the refrigerant outlet of the temperature treatment unit for the convenience of the heat pump unit 01 to reprocess the refrigerant output by the temperature treatment unit, the first water outlet of the heat pump unit 01 is connected to the water inlet of the air-water heat exchange unit for conveying high-temperature cooling water to the air-water heat exchange unit, the first water inlet of the heat pump unit 01 is connected to the water outlet of the air-water heat exchange unit for the convenience of the heat pump unit 01 to reprocess the cooling return water output by the air-water heat exchange unit, the second water inlet of the heat pump unit 01 is connected to the water outlet of the water gushing unit 03 for the convenience of energy transfer between the heat pump unit 01 and the mine water gushing, the second water outlet of the heat pump unit 01 is connected to the heat exchange unit 04 for the convenience of the heat pump unit 01 to convey the high-temperature water gushing to the heat exchange unit 04.

[0045] In this embodiment, in the multi-stage evaporator of the temperature processing unit, the last stage evaporator realizes isohumid cooling of the mine airflow, and the rest realize cooling and dehumidification of the mine airflow. The multi-stage dehumidifier of the humidity processing unit realizes heating and dehumidification of the mine airflow. The water gushing unit 03 transports the mine gushing water to the heat pump unit 01 through the second water inlet of the heat pump unit 01. The temperature of the mine gushing water rises in the heat pump unit 01, and the temperature of the refrigerant in the heat pump unit 01 decreases. The heat exchange between the mine gushing water and the refrigerant in the heat pump unit 01 is used to realize effective utilization of energy. The high-temperature mine gushing water reaches the heat exchanger through the second water outlet of the heat pump unit 01. Group 04 provides heat source for the heating equipment on the well, realizing the effective utilization of high-temperature mine water; after the pretreatment unit sends the mine air flow into the temperature treatment unit, the temperature treatment unit cools the mine air flow, and the temperature treatment unit and the heat pump unit 01 form a refrigerant circulation loop. The heat pump unit 01 sends refrigerant to the temperature treatment unit. After the refrigerator in the temperature treatment unit transfers energy with the mine air flow, the mine air flow temperature decreases and the refrigerant temperature increases. The high-temperature refrigerant flows back to the heat pump unit 01 through the refrigerant outlet of the temperature treatment unit. The heat pump unit 01 cools the refrigerant. Such a cycle saves energy while improving Energy utilization rate; the mine air flow after the cooling treatment enters the humidity treatment unit, and the humidity treatment unit absorbs the moisture in the mine air flow through the desiccant material to reduce the air humidity of the mine air flow. The multi-stage evaporator of the temperature treatment unit and the multi-stage dehumidifier of the humidity treatment unit are arranged at intervals. After the temperature treatment unit and the humidity treatment unit cool and dehumidify the mine air flow multiple times, the mine air flow is sent to the mine working face through the air supply unit. The air supply unit is the air supply fan 29. Part of the air flow after the cooling treatment enters the air-water heat exchange unit. The air-water heat exchange unit and the heat pump unit 01 form a cooling water circuit. The cooling water exchanges heat with the refrigerant in the heat pump unit 01. After the amount is measured, high-temperature cooling water is formed. After the high-temperature cooling water enters the air-water heat exchange unit, it transfers heat with the mine air flow entering the air-water heat exchange unit, so the mine air flow temperature increases and the cooling water temperature decreases. The low-temperature cooling water enters the heat pump unit 01 as cooling return water and continues to transfer heat, so that the mine air flow flowing out of the air-water heat exchange unit remains at a high temperature. After the high-temperature airflow dehumidifies the desiccant material in the humidity treatment unit, the desiccant material continues to dehumidify the mine air flow. The air-water heat exchange unit and the temperature treatment unit continue to treat the mine air flow through a circulation loop, which reduces the energy consumption of the system and achieves energy saving and environmental protection.

[0046] The heat pump unit 01 includes an expansion valve 12, a first condenser 13, a second condenser 14, a bypass valve 15 and a compressor 16. The refrigerant inlet of the compressor 16 is connected to the refrigerant outlet of the temperature treatment unit, the refrigerant outlet of the compressor 16 is connected to the refrigerant inlet of the second condenser 14, the refrigerant outlet of the second condenser 14 is connected to the refrigerant inlet of the first condenser 13, the refrigerant outlet of the first condenser 13 is connected to the refrigerant inlet of the expansion valve 12, the refrigerant outlet of the expansion valve 12 is connected to the refrigerant inlet of the temperature treatment unit, and the bypass valve 15 is connected in parallel with the second condenser 14 to control the flow and pressure of the refrigerant in the pipeline.

[0047] In this embodiment, the refrigerant transfers heat along the second condenser 14 and the first condenser 13 to achieve two-stage condensation, ensuring that the refrigerant sent to the temperature treatment unit remains at a low temperature; the water inlet of the second condenser 14 is connected to the water outlet of the water gushing unit 03, and the mine water is sent to the water inlet of the second condenser 14. The mine water exchanges heat with the refrigerant in the second condenser 14, and obtains high-temperature water and low-temperature refrigerant. The high-temperature water is sent out from the water outlet of the second condenser 14 and sent to the ground through the heat exchange unit 04 for ground heating. The condensation heat of the heat pump unit 01 is used to increase the heat of the mine water, thereby providing a heat source for the heating equipment on the well, thereby improving the energy utilization rate of the mine waste heat;

[0048] The water outlet of the first condenser 13 sends the high-temperature cooling water into the water inlet of the air-water heat exchange unit. In the air-water heat exchange unit, the high-temperature cooling water and the regenerated air exchange heat to realize the heating of the regenerated air. The air-water heat exchange unit sends the low-temperature cooling water that has released the heat as cooling return water into the first condenser 13. The low-temperature cooling water and the refrigerant exchange heat in the first condenser 13 to obtain high-temperature cooling water and low-temperature refrigerant. The high-temperature cooling water continues to enter the air-water heat exchange unit for heat exchange, and the low-temperature refrigerant continues to enter the temperature treatment unit to cool the mine airflow, realizing energy recycling. The condensation heat of the heat pump unit 01 is used to heat the regenerated air to drive the rotary dehumidification system to regenerate, thereby reducing the regeneration energy consumption; the low-temperature refrigerant exchanges heat along the second condenser 14 and the first condenser 13, thereby improving the treatment effect of the temperature treatment unit on the mine airflow.

[0049] The pretreatment unit includes an air filter 17 and a surface cooler 18, and the air outlet of the air filter 17 is connected to the air inlet of the surface cooler 18; the temperature treatment unit includes a first evaporator 20, a second evaporator 24 and a third evaporator 28, the refrigerant inlet of the first evaporator 20 is the refrigerant inlet of the temperature treatment unit, the refrigerant outlet of the first evaporator 20 is connected to the refrigerant inlet of the second evaporator 24, the refrigerant outlet of the second evaporator 24 is connected to the refrigerant inlet of the third evaporator 28, and the refrigerant outlet of the third evaporator 28 is the refrigerant outlet of the temperature treatment unit.

[0050] In this embodiment, the temperature processing unit includes three evaporators, namely the first evaporator 20, the second evaporator 24 and the third evaporator 28. The three evaporators are connected in series to deeply cool the mine air flow; the refrigerant flows along the first evaporator 20, the second evaporator 24 and the third evaporator 28 and cools and dehumidifies the mine air flow. The mine air flow first enters the air filter 17 through the air inlet, and the air filter 17 filters the mine air flow. The filtered mine air flow enters the surface cooler 18, and the surface cooler 18 pre-cools the mine air flow. The cooled mine air flow enters the mixing section, and the mine air flow is mixed with the regenerated exhaust air discharged from the regeneration area of ​​the first-stage dehumidifier of the humidity processing unit. The mixed air flow enters the first evaporator 20 for cooling and dehumidification. Then the airflow enters the processing area of ​​the first-stage dehumidifier of the humidity processing unit for dehumidification to obtain high-temperature and low-humidity air. The high-temperature and low-humidity air enters the second evaporator 24 for further cooling and dehumidification. The airflow after cooling and dehumidification by the second evaporator 24 is divided into two parts. The first part of the airflow is heated and dehumidified by the dehumidification area of ​​the second-stage dehumidifier of the humidity processing unit and then passes through the third evaporator 28 for equal humidity cooling. The third evaporator 28 sends the low-temperature and low-humidity airflow into the air supply unit, and the air supply unit sends the low-temperature and low-humidity mine airflow into the mine working face, thereby realizing cooling and dehumidification of the high-temperature and high-humidity air in the mine to meet the thermal comfort of the staff; the second part of the airflow after cooling and dehumidification by the second evaporator 24 is heated and dehumidified by the purge area of ​​the second-stage dehumidifier of the humidity processing unit.

[0051] A first condensate pan 31 is provided at the bottom of the first evaporator 20 , and a second condensate pan 35 is provided at the bottom of the second evaporator 24 . The water outlet of the first condensate pan 31 and the water outlet of the second condensate pan 35 are both connected to the water inlet of the surface cooler 18 .

[0052] In this embodiment, the first evaporator 20 and the second evaporator 24 cool and dehumidify the air, which will produce condensed water; the first condensed water tray 31 and the second condensed water tray 35 are respectively arranged under the first evaporator 20 and the second evaporator 24, and the condensed water at the outlet of the first condensed water tray 31 and the second condensed water tray 35 are mixed through the second converging water valve 32, and the mixed condensed water is sent to the water inlet of the surface cooler 18 to provide a cold source for the surface cooler 18, thereby realizing pre-cooling of the mine air, and the condensed return water that absorbs the heat of the air is discharged through the water outlet of the surface cooler 18, and the condensed water discharged from the first evaporator 20 and the second evaporator 24 is used as the cold source of the surface cooler 18 to pre-cool the mine air, thereby improving the cooling efficiency of the unit.

[0053] The humidity processing unit includes a two-partition rotary dehumidifier 21 and a three-partition rotary dehumidifier 25. The two-partition rotary dehumidifier 21 is arranged between the first evaporator 20 and the second evaporator 24, and the three-partition rotary dehumidifier 25 is arranged between the second evaporator 24 and the third evaporator 28. The two-partition rotary dehumidifier 21 is provided with a first partition 19, which divides the two-partition rotary dehumidifier 21 into a processing zone 21-1 and a regeneration zone 21-2. The three-partition rotary dehumidifier 25 is provided with a second partition 22, which divides the three-partition rotary dehumidifier 25 into a processing zone 25-1, a purge zone 25-2 and a regeneration zone 25-3.

[0054] In this embodiment, the humidity processing unit includes a two-stage dehumidifier, namely a two-partition rotary dehumidifier 21 and a three-partition rotary dehumidifier 25. The first partition 19 is a ┛-shaped structure. The first partition 19 divides the two-partition rotary dehumidifier 21 into a processing zone 21-1 and a regeneration zone 21-2 with an area ratio of 3:1. The two-partition rotary dehumidifier 21 is provided with a first belt 33 and a first electric rotor 34. The two-partition rotary dehumidifier 21 rotates continuously under the action of the first belt 33 and the first electric rotor 34. The desiccant material in the processing zone 21-1 dehumidifies the mine airflow discharged from the first evaporator 20. The desiccant material absorbs moisture in the air to reduce the air humidity. At the same time, the adsorption heat released by the desiccant material dehumidifies the air. The high-temperature, low-humidity air is heated to obtain high-temperature, low-humidity air, which enters the second evaporator 24 for further cooling and dehumidification. The desiccant material absorbing moisture in the processing zone 21-1 rotates to the regeneration zone 21-2 as the two-partition rotary dehumidifier 21 rotates. The high-temperature regeneration air in the regeneration zone 21-2 dilutes the moisture in the desiccant material. As the temperature rises, the moisture evaporates into water vapor and is discharged. The desiccant material passing through the regeneration zone 21-2 returns to the processing zone 21-1 as the two-partition rotary dehumidifier 21 rotates. The desiccant material rotated to the processing zone 21-1 continues to dehumidify the airflow discharged from the first evaporator 20, so that the airflow discharged from the processing zone 21-1 of the two-partition rotary dehumidifier 21 remains in a low-humidity state.

[0055] The second partition 22 is a ┻-shaped structure. After the second partition 22 divides the three-partition rotary dehumidifier 25, the area ratio of the processing zone 25-1, the purge zone 25-2 and the regeneration zone 25-3 of the three-partition rotary dehumidifier 25 is 2:1:1. The three-partition rotary dehumidifier 25 is provided with a second belt 37 and a second electric rotor 38. The three-partition rotary dehumidifier 25 rotates continuously under the action of the second belt 37 and the second electric rotor 38. The desiccant material in the processing zone 25-1 dehumidifies the airflow discharged from the second evaporator 24 to obtain high-temperature and low-humidity air. The high-temperature and low-humidity air enters the third evaporator 28 for isohype cooling. The third evaporator 28 sends the low-temperature and low-humidity airflow into the mine working face. The desiccant material that has absorbed moisture rotates to the regeneration zone 25-3 as the three-partition rotary dehumidifier 25 rotates. The high-temperature regeneration air in the regeneration zone 25-3 releases the moisture in the desiccant material. As the temperature rises, the moisture evaporates into water vapor and is discharged. The desiccant material that has passed through the regeneration zone 25-3 reaches the purge zone 25-2 and the treatment zone 25-1 in turn as the three-partition rotary dehumidifier 25 rotates. After entering the treatment zone 25-1, the desiccant material continues to dehumidify the mine airflow discharged from the second evaporator 24. This cycle continues, and the mine airflow is deeply dehumidified through the two-partition rotary dehumidifier 21 and the three-partition rotary dehumidifier 25, thereby solving the problems of poor cooling effect and insufficient dehumidification capacity caused by heat damage in deep mines.

[0056] The air-water heat exchange unit includes a regeneration fan 27, a first air-water heat exchanger 26 and a second air-water heat exchanger 23. The air inlet of the regeneration fan 27 is connected to the air outlet of the purge zone 25-2 of the three-partition rotary dehumidifier 25, the air outlet of the regeneration fan 27 is connected to the air inlet of the first air-water heat exchanger 26, the air outlet of the first air-water heat exchanger 26 is connected to the air inlet of the regeneration zone 25-3 of the three-partition rotary dehumidifier 25, the air outlet of the regeneration zone 25-3 of the three-partition rotary dehumidifier 25 is connected to the air inlet of the second air-water heat exchanger 23, the air outlet of the second air-water heat exchanger 23 is connected to the air inlet of the regeneration zone 21-2 of the two-partition rotary dehumidifier 21, and the air outlet of the regeneration zone 21-2 of the two-partition rotary dehumidifier 21 discharges regeneration exhaust air.

[0057] In this embodiment, part of the airflow discharged from the second evaporator 24 enters the purge zone 25-2 of the three-zone rotary dehumidifier 25. The purge zone 25-2 heats and dehumidifies the airflow and then discharges high-temperature, low-humidity air. The high-temperature, low-humidity air is sent to the first air-water heat exchanger 26 through the regeneration fan 27. The first air-water heat exchanger 26, the second air-water heat exchanger 23 and the first condenser 13 form a circulation loop. The first air-water heat exchanger 26 and the second air-water heat exchanger 23 are connected in parallel. The first condenser 13 continuously sends high-temperature cooling water to the first air-water heat exchanger 26 and the second air-water heat exchanger 23, so that the first air-water heat exchanger 26 can heat the high-temperature, low-humidity air as regeneration air. The regeneration air enters the three-zone rotary dehumidifier 25. The regeneration zone 25-3 of the zone rotary dehumidifier 25, the regeneration air in the regeneration zone 25-3 regenerates the desiccant material, the high-temperature air discharged from the regeneration zone 25-3 enters the second air-water heat exchanger 23 to be heated again under constant humidity, and the heated air enters the regeneration zone 21-2 of the two-zone rotary dehumidifier 21 as regeneration air to regenerate the desiccant material, the high-temperature air discharged from the regeneration zone 21-2 is used as regeneration exhaust air and merges with the mine airflow discharged from the surface cooler 18 and then enters the first evaporator 20, and is heated by the purge zone 25-2, the first air-water heat exchanger 26 and the second air-water heat exchanger 23 as regeneration air, thereby reducing the heating energy consumption of the regeneration air and solving the problem of high regeneration energy consumption of the rotary dehumidification system.

[0058] Both the two-zone rotary dehumidifier 21 and the three-zone rotary dehumidifier 25 use silica gel as the desiccant material.

[0059] A converging air valve 30 is provided on the connecting pipeline between the air outlet of the surface cooler 18 and the air inlet of the first evaporator 20. The air inlet of the converging air valve 30 is respectively connected to the air outlet of the surface cooler 18 and the air outlet of the regeneration zone 21-2 of the two-zone rotary dehumidifier 21, and the air outlet of the converging air valve 30 is connected to the air inlet of the first evaporator 20; a diverter air valve 36 is provided on the connecting pipeline between the second evaporator 24 and the three-zone rotary dehumidifier 25. The air inlet of the diverter air valve 36 is connected to the air outlet of the second evaporator 24, and the air outlet of the diverter air valve 36 is respectively connected to the air inlet of the treatment zone 25-1 of the three-zone rotary dehumidifier 25 and the air inlet of the purge zone 25-2 of the three-zone rotary dehumidifier 25.

[0060] In this embodiment, the regenerated exhaust air discharged from the regeneration zone 21-2 of the two-zone rotary dehumidifier 21 and the mine air flow discharged from the surface cooler 18 are mixed through the converging air valve 30, and the mixed air flow is sent to the first evaporator 20 for cooling and dehumidification. The regenerated exhaust air and the mine air flow discharged from the surface cooler 18 are merged through the converging air valve 30 to avoid uneven air flow or excessive pressure fluctuations; the air flow discharged from the second evaporator 24 enters the diverter air valve 36, and the diverter air valve 36 divides the air flow into two parts. The first part is heated and dehumidified in the dehumidification zone 25-1 of the three-zone rotary dehumidifier 25 and then passes through the third evaporator 28 for equal humidity cooling. The second part is sent to the purge zone 25-2 of the three-zone rotary dehumidifier 25 for heating and dehumidification. The air flow entering the dehumidification zone 25-1 and the purge zone 25-2 is adjusted by the diverter air valve 36 to ensure that the air flow in the branch pipe is appropriate to meet the regional flow requirements.

[0061] The air-water heat exchange unit is connected to the heat pump unit 01 through a water supply circuit and a return water circuit. The water supply circuit connects the first water outlet of the heat pump unit 01 and the water inlet of the air-water heat exchange unit. The return water circuit connects the water outlet of the air-water heat exchange unit and the first water inlet of the heat pump unit 01. A third diversion water valve 10 is provided on the water supply circuit. A converging water valve 11, a return water tank 9 and a return water pump 8 are provided in sequence on the return water circuit from the air-water heat exchange unit to the heat pump unit 01.

[0062] In this embodiment, the water outlet of the first condenser 13 is the first water outlet, the water inlet of the first condenser 13 is the first water inlet, the water outlet of the first condenser 13 is connected to the third diverter water valve 10, the third diverter water valve 10 diverts the high-temperature cooling water discharged from the first condenser 13, and sends the high-temperature cooling water to the first air-water heat exchanger 26 and the second air-water heat exchanger 23 respectively, so that the first air-water heat exchanger 26 and the second air-water heat exchanger 23 can respectively increase the regeneration airflow. The low-temperature cooling water discharged from the first air-water heat exchanger 26 and the second air-water heat exchanger 23 is mixed by the combined water valve 11 and sent to the return water tank 9. The low-temperature cooling water is pumped into the first condenser 13 by the return water pump 8. The low-temperature cooling water and the refrigerant transfer heat in the first condenser 13. The first condenser 13 continues to send high-temperature cooling water to the first air-water heat exchanger 26 and the second air-water heat exchanger 23. This cycle is repeated to realize the repeated use of energy and improve the energy utilization rate.

[0063] The water gushing unit 03 includes a water treatment device 6 and a water gushing tank 7. The water treatment device 6 treats the mine gushing water and sends it to the water gushing tank 7. The water gushing tank 7 sends the aqueous solution to the heat pump unit 01 through the second water inlet of the heat pump unit 01.

[0064] The heat exchange unit 04 includes a gushing water pump 5, a heat exchanger for wellbore antifreeze 05, a heat exchanger for domestic hot water 06 and a heat exchanger for building heating 07. The water inlet of the gushing water pump 5 is connected to the second water outlet of the heat pump unit 01, and the water outlet of the gushing water pump 5 is connected to the heat exchanger for wellbore antifreeze 05, the heat exchanger for domestic hot water 06 and the heat exchanger for building heating 07 through pipelines. A first diverter water valve 3 is provided at the water inlet of the heat exchanger for wellbore antifreeze 05, and a second diverter water valve 4 is provided at the water inlet of the heat exchanger for building heating 07.

[0065] In this embodiment, the mine water flows through the water treatment equipment 6 and is sent to the water tank 7, which stores the mine water. The water tank 7 sends the mine water to the second condenser 14, where the mine water exchanges heat with the refrigerant to obtain high-temperature water. The high-temperature water is discharged from the water outlet of the second condenser 14 and is sent to the wellbore antifreeze heat exchanger 05, the domestic hot water heat exchanger 06 and the building heating heat exchanger 07 on the ground through the water pump 5. When the first diverter valve 3 is opened, the high-temperature water can be discharged. The high-temperature gushing water is sent to the wellbore antifreeze heat exchanger 05. If the first diverter water valve 3 is closed, the water inlet of the wellbore antifreeze heat exchanger 05 is closed, and the high-temperature gushing water cannot be sent to the wellbore antifreeze heat exchanger 05. The second diverter water valve 4 is used to control whether the high-temperature gushing water is sent to the building heating heat exchanger 07. If the second diverter water valve 4 is open, the high-temperature gushing water is sent to the building heating heat exchanger 07. If the second diverter water valve 4 is closed, the water inlet of the building heating heat exchanger 07 is closed, and the high-temperature gushing water cannot be sent to the building heating heat exchanger 07.

[0066] In winter, part of the high-temperature gushing water is connected to the water inlet of the well air-water heat exchanger 2 through the outlet end of the first diverter water valve 3, and the fresh air is connected to the air outlet of the well fan 1 of the wellbore anti-freezing heat exchanger 05 and the air inlet of the wellbore air-water heat exchanger 2. The air outlet of the wellbore air-water heat exchanger 2 is connected to the air inlet lane, and the water outlet of the wellbore air-water heat exchanger 2 discharges the gushing water; part of the high-temperature gushing water is divided into two parts again, part of which is connected to the building heating heat exchanger 07 through the outlet of the second diverter water valve 4, and the building heating heat exchanger 07 is connected to the heat terminal equipment, and the remaining high-temperature gushing water is connected to the domestic hot water heat exchanger 06, and the domestic hot water heat exchanger 06 is connected to the hot water equipment; in summer, the first diverter water valve 3 and the second diverter water valve 4 are closed, and the outlet of the gushing water pump 5 is connected to the domestic hot water heat exchanger 06.

[0067] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural transformation made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A deep mine waste heat utilization and low dew point rotor dehumidification and cooling system, characterized by: It comprises a heat pump unit (01), an air handling unit (02), a water gushing unit (03) and a heat exchange unit (04), wherein the air handling unit (02), the water gushing unit (03) and the heat exchange unit (04) are all connected to the heat pump unit (01); The air handling unit (02) includes a pretreatment unit, an air-water heat exchange unit, a temperature treatment unit, a humidity treatment unit and an air supply unit. The pretreatment unit is connected to the temperature treatment unit and sends the mine air flow into the temperature treatment unit. The temperature treatment unit includes a multi-stage evaporator. The humidity treatment unit includes a multi-stage dehumidifier. An evaporator is provided on both the front and rear sides of each stage of the dehumidifier. The temperature treatment unit and the humidity treatment unit perform multi-stage cooling and dehumidification on the mine air flow and then send the mine air flow into the air supply unit. The air supply unit discharges the treated mine air flow into the mine working face. The air-water heat exchange unit is arranged on a side of the humidity treatment unit away from the pretreatment unit to facilitate pretreatment of the air flow entering the humidity treatment unit. The refrigerant outlet of the heat pump unit (01) is connected to the refrigerant inlet of the temperature treatment unit for delivering refrigerant to the temperature treatment unit. The refrigerant inlet of the heat pump unit (01) is connected to the refrigerant outlet of the temperature treatment unit so that the heat pump unit (01) can reprocess the refrigerant output from the temperature treatment unit. The first water outlet of the heat pump unit (01) is connected to the water inlet of the air-water heat exchange unit for delivering high-temperature cooling water to the air-water heat exchange unit. The first water inlet of the heat pump unit (01) is connected to the water outlet of the air-water heat exchange unit so that the heat pump unit (01) can reprocess the cooling return water output by the air-water heat exchange unit. The second water inlet of the heat pump unit (01) is connected to the water outlet of the water gushing unit (03) so that the heat pump unit (01) and the mine water gushing can be transferred to each other. The second water outlet of the heat pump unit (01) is connected to the heat exchange unit (04) so ​​that the heat pump unit (01) can transport the high-temperature water gushing to the heat exchange unit (04).

2. A deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 1, characterized in that: The heat pump unit (01) comprises an expansion valve (12), a first condenser (13), a second condenser (14), a bypass valve (15) and a compressor (16), wherein the refrigerant inlet of the compressor (16) is connected to the refrigerant outlet of the temperature treatment unit, the refrigerant outlet of the compressor (16) is connected to the refrigerant inlet of the second condenser (14), the refrigerant outlet of the second condenser (14) is connected to the refrigerant inlet of the first condenser (13), the refrigerant outlet of the first condenser (13) is connected to the refrigerant inlet of the expansion valve (12), the refrigerant outlet of the expansion valve (12) is connected to the refrigerant inlet of the temperature treatment unit, and the bypass valve (15) is connected in parallel with the second condenser (14) to control the flow rate and pressure of the refrigerant in the pipeline.

3. The deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 1 is characterized in that: The pretreatment unit comprises an air filter (17) and a surface cooler (18), wherein the air outlet of the air filter (17) is connected to the air inlet of the surface cooler (18); The temperature treatment unit comprises a first evaporator (20), a second evaporator (24) and a third evaporator (28), wherein the refrigerant inlet of the first evaporator (20) is the refrigerant inlet of the temperature treatment unit, the refrigerant outlet of the first evaporator (20) is connected to the refrigerant inlet of the second evaporator (24), the refrigerant outlet of the second evaporator (24) is connected to the refrigerant inlet of the third evaporator (28), and the refrigerant outlet of the third evaporator (28) is the refrigerant outlet of the temperature treatment unit.

4. The deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 3 is characterized by: A first condensate pan (31) is provided at the bottom of the first evaporator (20), and a second condensate pan (35) is provided at the bottom of the second evaporator (24). The water outlet of the first condensate pan (31) and the water outlet of the second condensate pan (35) are both connected to the water inlet of the surface cooler (18).

5. The deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 3 is characterized by: The humidity processing unit comprises a two-partition rotary dehumidifier (21) and a three-partition rotary dehumidifier (25). The two-partition rotary dehumidifier (21) is arranged between a first evaporator (20) and a second evaporator (24), and the three-partition rotary dehumidifier (25) is arranged between the second evaporator (24) and the third evaporator (28). The two-partition rotary dehumidifier (21) is provided with a first partition (19), and the first partition (19) divides the two-partition rotary dehumidifier (21) into a processing zone (21-1) and a regeneration zone (21-2). The three-partition rotary dehumidifier (25) is provided with a second partition (22), and the second partition (22) divides the three-partition rotary dehumidifier (25) into a processing zone (25-1), a purge zone (25-2), and a regeneration zone (25-3).

6. A deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 5, characterized in that: The air-water heat exchange unit comprises a regeneration fan (27), a first air-water heat exchanger (26) and a second air-water heat exchanger (23), the air inlet of the regeneration fan (27) is connected to the air outlet of the purge zone (25-2) of the three-zone rotary dehumidifier (25), the air outlet of the regeneration fan (27) is connected to the air inlet of the first air-water heat exchanger (26), the air outlet of the first air-water heat exchanger (26) is connected to the air inlet of the three-zone rotary dehumidifier (25), and the air outlet of the first air-water heat exchanger (26) is connected to the air inlet of the three-zone rotary dehumidifier (25). The air inlet of the regeneration zone (25-3) of the three-zone rotary dehumidifier (25) is connected, the air outlet of the regeneration zone (25-3) of the three-zone rotary dehumidifier (25) is connected to the air inlet of the second air-water heat exchanger (23), the air outlet of the second air-water heat exchanger (23) is connected to the air inlet of the regeneration zone (21-2) of the two-zone rotary dehumidifier (21), and the air outlet of the regeneration zone (21-2) of the two-zone rotary dehumidifier (21) discharges regeneration exhaust air.

7. A deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 6, characterized in that: A converging air valve (30) is provided on the connecting pipe between the air outlet of the surface cooler (18) and the air inlet of the first evaporator (20), the air inlet of the converging air valve (30) being respectively connected to the air outlet of the surface cooler (18) and the air outlet of the regeneration zone (21-2) of the two-zone rotary dehumidifier (21), and the air outlet of the converging air valve (30) being connected to the air inlet of the first evaporator (20); A diverter air valve (36) is provided on the connecting pipeline between the second evaporator (24) and the three-zone rotary dehumidifier (25); the air inlet of the diverter air valve (36) is connected to the air outlet of the second evaporator (24); and the air outlet of the diverter air valve (36) is respectively connected to the air inlet of the treatment zone (25-1) of the three-zone rotary dehumidifier (25) and the air inlet of the purge zone (25-2) of the three-zone rotary dehumidifier (25).

8. The deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 1 is characterized in that: The air-water heat exchange unit is connected to the heat pump unit (01) through a water supply circuit and a water return circuit. The water supply circuit is connected to the first water outlet of the heat pump unit (01) and the water inlet of the air-water heat exchange unit. The water return circuit is connected to the water outlet of the air-water heat exchange unit and the first water inlet of the heat pump unit (01). A third diverter valve (10) is provided on the water supply circuit. A converging water valve (11), a return water tank (9) and a return water pump (8) are provided on the return water circuit in sequence from the air-water heat exchange unit to the heat pump unit (01).

9. The deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 1 is characterized by: The water gushing unit (03) comprises a water treatment device (6) and a water gushing tank (7). The water treatment device (6) treats the mine gushing water and sends it to the water gushing tank (7). The water gushing tank (7) sends the aqueous solution to the heat pump unit (01) through the second water inlet of the heat pump unit (01).

10. The deep mine waste heat utilization and low dew point rotary dehumidification and cooling system according to claim 1, characterized in that: The heat exchange unit (04) comprises a gushing water pump (5), a heat exchanger for wellbore antifreeze (05), a heat exchanger for domestic hot water (06), and a heat exchanger for building heating (07); the water inlet of the gushing water pump (5) is connected to the second water outlet of the heat pump unit (01); the water outlet of the gushing water pump (5) is connected to the heat exchanger for wellbore antifreeze (05), the heat exchanger for domestic hot water (06), and the heat exchanger for building heating (07) through pipelines; a first diverter valve (3) is provided at the water inlet of the heat exchanger for wellbore antifreeze (05), and a second diverter valve (4) is provided at the water inlet of the heat exchanger for building heating (07).

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