Mine waste heat recovery equipment based on environmental protection

Abstract

The present application belongs to the technical field of mine waste heat recovery, and particularly relates to a mine waste heat recovery equipment based on environmental protection, which comprises a return air passage communicated to a return air shaft and a filter screen installed in the return air passage, a spray tower communicated with another passage opening of the return air passage; an atomization spraying mechanism installed in the spray tower and used for atomizing and spraying and settling dust in mine return air in the spray tower; a demisting mechanism installed in the spray tower and located above the atomization spraying mechanism and used for removing fine water droplets entrained in the airflow; a spraying water circulating mechanism installed in the spray tower and used for settling and forming circulating water for spraying water falling; and a circulating heating mechanism used for heating the circulating water and conveying a part of the heated circulating water to the atomization spraying mechanism and recycling the other part of the heated circulating water; the present application can compensate for instantaneous temperature drop of the return air after purification caused by spraying, so as to ensure that the temperature of the return air flow entering the waste heat exchanger is always maintained in a target range.

Description

Technical Field

[0001] This invention belongs to the field of mine waste heat recovery technology, and in particular relates to an environmentally friendly mine waste heat recovery device. Background Technology

[0002] Mine waste heat recovery refers to the recovery and utilization of energy from waste heat generated in mines. Mines generate a large amount of waste heat during mining operations. If this waste heat is not utilized, it will be wasted. Through waste heat recovery technology, mine waste heat can be converted into useful energy, thereby improving energy utilization efficiency.

[0003] Mine return air (exhaust air) contains abundant waste heat resources, and the temperature and humidity of the return airflow remain relatively stable throughout the year, making it a high-quality low-temperature heat source. However, during coal mine production, this heat is often directly released into the atmosphere and thus wasted.

[0004] In mine return air waste heat recovery systems, dust is the main cause of blockage, wear, and reduced heat exchange efficiency in heat exchangers (such as heat pipe heat exchangers and plate heat exchangers). Most existing waste heat recovery equipment removes dust from mine return air by first separating large dust particles with a separator, and then performing wet dust removal through mechanical atomization spraying. However, the biggest problem with spraying dust removal for mine return air waste heat recovery is that the temperature of the return air will drop when the cooled spray water comes into direct contact with the air, thus affecting the recovery and utilization of waste heat from the purified return air. If the cooled spray water is heated separately, it will cause unnecessary waste of resources. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an environmentally friendly mine waste heat recovery device, comprising a return air duct connected to a return air shaft and a filter screen installed within the return air duct, and further comprising: The system includes a spray tower connected to another opening of the return air duct; an atomizing spray mechanism installed inside the spray tower to atomize and settle dust in the mine return air entering the spray tower; a demisting mechanism installed inside the spray tower and above the atomizing spray mechanism to remove fine water droplets carried in the airflow; a spray water circulation mechanism installed inside the spray tower to settle the spray water falling from the spray tower to form circulating water; and a circulating heating mechanism installed inside the return air duct to heat the circulating water, and to transport part of the heated circulating water to the atomizing spray mechanism and to recycle the rest.

[0006] Further specified, the atomizing spray mechanism includes a guide bend, a booster pump, an annular pipe, a diverter pipe, and high-pressure atomizing nozzles; one port of the guide bend is connected to the circulating heating mechanism; a booster pump is installed on the outside of the spray tower via a fixing plate, and the inlet of the booster pump is connected to the other port of the guide bend; an annular pipe is installed on the outside of the spray tower via a bracket, and the annular pipe is connected to the outlet of the booster pump; several diverter pipes are laid flat inside the spray tower, and their ports are connected to the annular pipe; each diverter pipe is equipped with multiple high-pressure atomizing nozzles facing downwards from the spray tower.

[0007] More specifically, the demisting mechanism includes a fixed ring, baffles, and a liquid collecting conduit; the fixed ring, which is hollow inside, is installed inside the spray tower and is located above the atomizing spray mechanism. Several baffles are installed side by side and in an inclined state inside the fixed ring, and each baffle has a guide groove. The inclined end of each baffle extends into the hollow fixed ring. The hollow fixed ring is connected to a liquid collecting conduit, which is connected to the spray water circulation mechanism.

[0008] Further specified, the spray water circulation mechanism includes a sedimentation tank, a funnel-shaped filter screen, a vertical guide pipe, a sealing and connecting component, a central guide pipe, a circulating water tank unit, a first diversion pipe, and a drain pipe; the bottom of the spray tower is connected to a conical sedimentation tank, and a funnel-shaped filter screen is fixedly installed inside the sedimentation tank. A vertical guide pipe is vertically installed in the middle of the funnel-shaped filter screen, and the lower end of the vertical guide pipe extends outside the sedimentation tank. A sealing and connecting component is installed inside the vertical guide pipe. The central guide pipe connects to the tank wall between the bottom of the sedimentation tank and the funnel-shaped filter screen, and the outer end of the central guide pipe connects to the circulating water tank unit outside the spray tank. The outlet of the circulating water pump of the circulating water tank unit is connected to the circulating heating mechanism through the first diversion pipe, and a collection guide pipe and a drain pipe are connected to the water tank body of the circulating water tank unit.

[0009] Further specifying, the sealing and guiding assembly includes an upper sealing pipe, a lower sealing pipe, a sealing disc, a support rod, a vertical support rod, and a push-telescopic rod; the vertical guide pipe has two sets and multiple drainage notches along the vertical direction on its wall, with the upper set of drainage notches flush with the center mesh of the funnel filter, and the lower set of drainage notches flush with the bottom of the sedimentation tank; the upper sealing pipe and the lower sealing pipe are movably installed inside the vertical guide pipe, with the upper sealing pipe movably aligned with the upper set of drainage notches, and the lower sealing pipe movably aligned with the lower set of drainage notches; a sealing disc is sealed at the upper opening of the upper sealing pipe, and multiple support rods are fixedly installed at the upper opening of the lower sealing pipe; a vertical support rod is movably installed inside the vertical guide pipe, and the vertical support rod is connected to the sealing disc and the multiple support rods respectively; a push-telescopic rod is fixedly installed below the sedimentation tank, and the output rod of the push-telescopic rod is connected to the vertical support rod.

[0010] Further specifying, the sealing and guiding assembly also includes a vertical shaft, an impeller, and scrapers. The top of the vertical duct with the top sealed is equipped with a vertical shaft, and an impeller is installed on the top of the vertical shaft. The impeller is aligned with the air outlet of the return air channel. Multiple scrapers are fixedly installed on the outer wall of the vertical duct, and the multiple scrapers are staggered from the drain notch. The multiple scrapers are in contact with the surface of the funnel filter screen.

[0011] Further specifying, the sealing and conducting assembly also includes a conical sealing plug, a waste discharge conduit, and a guide slider; the conical sealing plug is fixedly installed on the vertical support rod, and the conical sealing plug is movably installed at the lower opening of the vertical conduit; the waste discharge conduit is connected to the vertical conduit above the conical sealing plug; multiple vertical grooves are opened inside the upper opening of the vertical conduit; a guide slider that slides with the vertical grooves is installed on the outer wall of the upper sealing tube; and the bottom of the vertical support rod is rotatably connected to the output rod of the push telescopic rod.

[0012] Further specified, the circulating heating mechanism includes an inlet water pipe, a serpentine coil, a mounting bracket, and an outlet water pipe. The inlet water pipe is detachably connected to the drain pipe on the water tank of the circulating water tank unit. A through slot is provided on the return air channel for the installation of the serpentine coil. The serpentine coil is detachably installed in the through slot via the mounting bracket. The inlet of the serpentine coil is connected to the inlet water pipe, and its drain outlet is detachably connected to the guide bend via a three-way valve and the outlet water pipe.

[0013] The present invention has the following beneficial effects: This invention utilizes the combined action of a spray water circulation mechanism and a circulating heating mechanism. The spray water circulation mechanism performs multi-stage filtration, sedimentation, and treatment on the falling spray water, while the circulating heating mechanism installed in the return air duct heats the flowing circulating water. This eliminates the need for separate heating of the purified circulating water and allows the atomizing spray mechanism to spray the heated spray water into the spray tower, compensating for the instantaneous temperature drop in the purified return air caused by spraying. This ensures that the temperature of the return airflow entering the waste heat exchanger is always maintained within the target range.

[0014] This invention, through the use of a funnel filter screen installed in the sedimentation tank, and the coordination of a central conduit connecting the bottom of the sedimentation tank to the circulating water tank unit, allows for the direct separation, interception, and sedimentation of dust and impurities in the spray water within the sedimentation tank. The central conduit only pumps out the supernatant from the sedimentation tank, preventing excessive discharge of sedimented particulate impurities into the circulating water tank unit for further filtration and purification. Because the spray water undergoes filtration, sedimentation, and purification, the treated circulating water, when flowing into the annular pipe, will not clog the high-pressure atomizing nozzles due to the presence of fine particulate impurities, thus avoiding clogging and affecting the atomization and spraying effect of the high-pressure atomizing nozzles on the circulating water, and consequently impacting the dust capture effect within the spray tower.

[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a cross-sectional view of a spray tower according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the atomizing spray mechanism according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of a sedimentation tank according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of a vertical conduit according to an embodiment of the present invention; Figure 6 This is a diagram showing the upper and lower sealing pipes of an embodiment of the present invention open from the drain opening; Figure 7 This is an embodiment of the present invention. Figure 6 Enlarged view of a portion of point A in the middle; Figure 8 This is a schematic diagram of the structure of the circulating heating mechanism according to an embodiment of the present invention.

[0018] In the diagram: 1. Return air shaft; 2. Return air duct; 3. Spray tower; 4. Atomizing spray mechanism; 41. Guide bend; 42. Booster pump; 43. Circular pipe; 44. Diversion duct; 45. High-pressure atomizing nozzle; 5. Demisting mechanism; 51. Fixing ring; 52. Baffle plate; 53. Liquid collection duct; 6. Spray water circulation mechanism; 61. Sedimentation tank; 62. Funnel filter screen; 63. Vertical duct; 631. Sewage discharge opening; 64. Central duct; 65. Circulating water tank unit; 66. First diversion pipe; 67. Drain pipe; 7. Sealing and connecting assembly; 71. Upper sealing pipe; 72. Lower sealing pipe; 73. Sealing disc; 74. Support rod; 75. Vertical support rod; 76. Push telescopic rod; 77. Vertical shaft; 78. Impeller; 79. Scraper; 791. Conical sealing plug; 792. Waste discharge pipe; 793. Guide slider; 8. Circulating heating mechanism; 81. Inlet pipe; 82. Serpentine coil; 83. Mounting bracket; 84. Outlet pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0021] Please see Figures 1-8 As shown, this invention is an environmentally friendly mine waste heat recovery device, including a return air channel 2 connected to a return air shaft 1 and a filter screen installed in the return air channel 2, and further including: a spray tower 3 connected to another channel opening of the return air channel 2; an atomizing spray mechanism 4 installed in the spray tower 3 to atomize and settle dust in the mine return air entering the spray tower 3; a demisting mechanism 5 installed in the spray tower 3 and located above the atomizing spray mechanism 4, used to remove fine water droplets entrained in the airflow; a spray water circulation mechanism 6 installed in the spray tower 3, used to settle the spray water falling from the spray to form circulating water; and a circulating heating mechanism 8 installed in the return air channel 2 to heat the circulating water, and to transport part of the heated circulating water to the atomizing spray mechanism 4 and to recycle the rest. It should be noted that the horizontal channel of the return air duct 2 is connected to the return air shaft 1, while the inclined channel of the return air duct 2 is connected to the spray tower 3. The demisting mechanism 5, the atomizing spray mechanism 4, and the spray water circulation mechanism 6 are installed sequentially from top to bottom in the spray tower 3. The top of the spray tower 3 transports the purified return air with residual heat to the containment space for recycling through the air guide pipe. The filter screen is installed on the inclined channel of the return air duct 2 in a detachable manner, and a drain port is opened at the bottom of the inclined channel. In order not to lose too much heat, a heat exchanger (not shown in the figure), such as a heat pipe heat exchanger, can be installed on the inclined channel and the back of the filter screen. The surface of the heat exchanger is coated with a nano-hydrophobic material to make it difficult for moisture and dust in the return air to adhere, thus reducing dust accumulation. Specifically, the working process of the waste heat recovery equipment in this mine is as follows: The first step is that the waste heat return air collected in the return air shaft 1 will be transported to the connected return air duct 2 through equipment such as blowers. At this time, the filter screen installed on the return air duct 2 will filter and connect the dust in the return air flow. Then, without contacting water, the heat pipe heat exchanger will first conduct the sensible heat and part of the latent heat in the return air through the heat pipe, which can be used for well shaft antifreeze and other places. In the second step, the return air after heat exchange in the heat exchanger will continue to flow through the return air channel 2. At this time, the residual heat of the return air will come into contact with the circulating heating mechanism 8, so that it heats the circulating water flowing in the circulating heating mechanism 8, so that the atomizing spray mechanism 4 can spray the heated spray water into the spray tower 3, which can compensate for the instantaneous temperature drop caused by spraying and ensure that the airflow temperature entering the waste heat heat exchanger is always maintained within the target range. Third, when the return air is delivered to the spray tower 3 through the upward inclined channel of the return air channel 2, the upward inclined channel will cause the return air to flow obliquely upward in the spray tower 3. At this time, the atomizing spray mechanism 4 will spray the spray water heated by the circulating heating mechanism 8 into the spray tower 3 in an atomized state over a large area. Since the atomizing spray mechanism 4 uses a high-pressure atomizing nozzle 45, it can atomize water into extremely fine particles of 5-10 micrometers, making the surface area of ​​the extremely fine water mist huge and the dust collection efficiency extremely high. Moreover, due to the extremely small amount of water, the amount of spray water used can be reduced. When the airflow that has been sprayed and settled continues to flow upward in the spray tower 3, the demisting mechanism 5 can capture the small water droplets carried in the airflow, preventing the water droplets from entering the heat exchanger installed in the containment space. In the fourth step, the spray water produced after spraying will fall into the spray water circulation mechanism 6 below the spray tower 3. At this time, the spray water circulation mechanism 6 will filter and settle the dust in the falling spray water. The settled spray water will continue to be transported to the circulation heating mechanism 8 for circulation heating. The spray water heated by the circulation heating mechanism 8 will not only be transported to the atomizing spray mechanism 4, but also to other equipment for recycling.

[0022] In a preferred embodiment of the present invention, see [reference needed]. Figure 2 and Figure 3 As shown, the atomizing spray mechanism 4 includes a guide bend 41, a booster pump 42, an annular pipe 43, a diversion conduit 44, and a high-pressure atomizing nozzle 45. One port of the guide bend 41 is connected to the circulating heating mechanism 8. The booster pump 42 is installed on the outside of the spray tower 3 through a fixing plate, and the inlet of the booster pump 42 is connected to the other port of the guide bend 41. The annular pipe 43 is installed on the outside of the spray tower 3 through a bracket, and the annular pipe 43 is connected to the outlet of the booster pump 42. Several diversion conduits 44 are laid flat inside the spray tower 3, and their ports are connected to the annular pipe 43. Each diversion conduit 44 is equipped with multiple high-pressure atomizing nozzles 45 facing downwards from the spray tower 3. It should be noted that multiple diversion pipes 44 are installed in the spray tower 3 in a front-to-back arrangement, and adjacent diversion pipes 44 are in a non-contact state; each diversion pipe 44 is equipped with multiple high-pressure atomizing nozzles along its length, and these high-pressure atomizing nozzles use high-pressure (>7MPa) nozzles to atomize water into extremely fine particles of 5-10 micrometers. Specifically, the circulating water heated by the circulating heating mechanism 8 enters the booster pump 42 through the guide bend 41. The booster pump 42 delivers the circulating water to the annular pipe 43 in a pressurized manner. Since multiple arranged diversion pipes 44 are connected to the annular pipe 43, the circulating water delivered to the annular pipe 43 is diverted into multiple diversion pipes 44. At this time, multiple high-pressure atomizing nozzles 45 spray the circulating water in the diversion pipes 44 into the spray tower 3 under high pressure, making the ultra-fine water mist have a huge specific surface area and extremely high dust collection efficiency. The sediment generated by the spraying will fall into the spray water circulation mechanism 6 for recycling.

[0023] In a preferred embodiment of the present invention, see [reference needed]. Figure 2 and Figure 3 As shown, the demisting mechanism 5 includes a fixed ring 51, baffles 52, and a liquid collecting conduit 53. The fixed ring 51, which is hollow inside, is installed inside the spray tower 3 and is located above the atomizing spray mechanism 4. Several baffles 52 are installed in parallel and in an inclined state inside the fixed ring 51, and each baffle 52 is provided with a guide groove. The inclined end of each baffle 52 extends into the hollow fixed ring 51. The hollow fixed ring 51 is connected to the liquid collecting conduit 53, and the liquid collecting conduit 53 is connected to the spray water circulation mechanism 6. It should be noted that the hollow fixing ring 51 is fixedly installed on the inner wall of the spray tower 3, and the baffle plate 52 adopts an S-shaped or corrugated shape. Specifically, as the settled airflow continues to flow upward within the spray tower 3, due to inertia, the dust and condensate droplets carrying moisture will collide with and collect on the wall of the baffle plate 52. Since the surface of the baffle plate 52 is provided with a guide groove and the baffle plate 52 is inclined, it ensures that the condensate can quickly enter the cavity-shaped fixed ring 51 along the guide groove. The upward airflow prevents secondary water carryover. The condensate entering the cavity-shaped fixed ring 51 will be discharged into the spray water circulation mechanism 6 through the liquid collection pipe 53 for recycling.

[0024] In a preferred embodiment of the present invention, see [reference needed]. Figure 2 and Figure 4 As shown, the spray water circulation mechanism 6 includes a sedimentation tank 61, a funnel-shaped filter screen 62, a vertical guide pipe 63, a central guide pipe 64, a circulating water tank unit 65, a first diversion pipe 66, a drain pipe 67, and a sealing and connecting assembly 7. The bottom of the spray tower 3 is connected to a cone-shaped sedimentation tank 61, and a funnel-shaped filter screen 62 is fixedly installed inside the sedimentation tank 61. A vertical guide pipe 63 is vertically installed in the middle of the funnel-shaped filter screen 62, and the lower end of the vertical guide pipe 63 extends out of the sedimentation tank 61. Externally, a sealing and conductive assembly 7 is installed inside the vertical conduit 63. The middle conduit 64 is connected to the pool wall between the bottom of the sedimentation tank 61 and the funnel filter screen 62. The outer port of the middle conduit 64 is connected to the circulating water tank unit 65 outside the spray tank. The outlet of the circulating water pump of the circulating water tank unit 65 is connected to the circulating heating mechanism 8 through the first diversion pipe 66. The water tank body of the circulating water tank unit 65 is connected to the liquid collection conduit 53 and the liquid discharge pipe 67. It should be noted that the sedimentation tank 61 adopts a conical funnel shape, the top of the vertical guide pipe 63 is sealed, and its bottom pipe extends downward out of the sedimentation tank 61. The funnel filter screen 62 is installed at the upper part of the sedimentation tank 61, while the pipe opening of the middle guide pipe 64 is higher than the bottom of the sedimentation tank 61, so that the falling spray water can first settle in the sedimentation tank 61 and then be discharged through the middle guide pipe 64; the circulating water tank unit 65 includes a circulating water pump and a water tank, and the water tank is equipped with an existing mechanism for filtering and purifying the spray water; Specifically, when the spray water carrying captured dust falls into the sedimentation tank 61, the funnel filter 62 first filters and intercepts the large dust particles in the spray water before it falls to the bottom of the sedimentation tank 61. At this time, the small dust particles in the spray water falling into the sedimentation tank 61 will undergo preliminary settling treatment inside the sedimentation tank 61. Since the central conduit 64 is connected to the bottom of the sedimentation tank, the central conduit 64, in cooperation with the circulating water tank unit 65, only draws the supernatant after sedimentation in the sedimentation tank 61 into the water tank. Thus, the sedimentation tank 61, in cooperation with the funnel filter 62, can directly filter and intercept the particulate dust mixed in the spray in stages. The filtration and purification system installed in the water tank... The mechanism can directly filter and intercept harmful substances and fine dust in the supernatant. The circulating water, after being purified again by the circulating water tank unit 65, will enter the circulating heating mechanism 8 through the first diversion pipe 66 for circulating heating treatment. At the same time, the circulating water tank unit 65 will also discharge excess circulating water through the drain pipe 67. Similarly, when the atomizing spray mechanism 4 is initially working, spray water can be injected or replenished into the circulating water tank unit 65 through the drain pipe 67 to enable the atomizing spray mechanism 4 to work normally. The circulating water tank unit 65 will only draw the supernatant filtered and settled in the sedimentation tank 61 into the water tank through the middle conduit 64, and will not allow the water tank to flow back into the sedimentation tank 61. When it is necessary to discharge the dust particles intercepted on the funnel filter screen 62 and the impurities settled at the bottom of the sedimentation tank 61, the return air duct 2 stops sending the return air to be purified into the spray tower 3. Then, the sealing and connecting component 7 in the vertical duct 63 is opened so that the dust particles intercepted on the funnel filter screen 62 and the sedimented impurities below can be discharged downward through the same vertical duct 63. At this time, the atomizing spray mechanism 4 can be started to work, so that the spray water falls in the spray tower 3 and can wash the impurities settled at the bottom of the funnel filter screen 62 and the sedimentation tank 61. This invention, through the cooperation of a funnel filter 62 installed in the sedimentation tank 61 and a central conduit 64 connected to the bottom of the sedimentation tank 61 and the circulating water tank unit 65, allows dust and impurities in the spray water to be directly separated, intercepted, and precipitated in the sedimentation tank 61. The central conduit 64 only draws out the supernatant from the sedimentation tank 61, without excessively discharging the particulate impurities intercepted in the sedimentation tank 61 into the circulating water tank unit 65 for further filtration and purification. Because the spray water has undergone filtration, sedimentation, and purification, the treated circulating water will not clog the high-pressure atomizing nozzle 45 due to the presence of fine particulate impurities when it enters the annular pipe 43. This would not affect the atomization spraying effect of the high-pressure atomizing nozzle 45 on the circulating water, thus affecting the dust capture effect in the spray tower 3.

[0025] In a preferred embodiment of the present invention, see [reference needed]. Figures 4-7As shown, the sealing and guiding assembly 7 includes an upper sealing pipe 71, a lower sealing pipe 72, a sealing disc 73, a support rod 74, a vertical support rod 75, and a push-and-telescopic rod 76. Two sets of multiple drainage holes 631 are vertically oriented on the wall of the vertical guide pipe 63. The upper set of drainage holes 631 is flush with the central mesh of the funnel filter screen 62, while the lower set of drainage holes 631 is flush with the bottom of the sedimentation tank 61. The upper sealing pipe 71 and the lower sealing pipe 72 are movably installed inside the vertical guide pipe 63, and the upper sealing pipe 71 is movably aligned with the upper set of drainage holes 631. The lower sealing pipe 72 is movably aligned with a set of sewage discharge gaps 631 below. The upper pipe opening of the upper sealing pipe 71 is sealed with a sealing disc 73. The upper pipe opening of the lower sealing pipe 72 is fixedly installed with at least four support rods 74 in a circumferential array, and the two adjacent support rods 74 are in a non-contact state (forming a sewage discharge gap). The vertical guide tube 63 is movably installed with a vertical support rod 75, and the vertical support rod 75 is connected to the sealing disc 73 and multiple support rods 74 respectively. The sedimentation tank 61 is fixedly installed with a push-telescopic rod 76 below, and the output rod of the push-telescopic rod 76 is connected to the vertical support rod 75. It should be noted that each set of sewage discharge gaps 631 preferably consists of four, and they are arranged in a circular array along the wall of the vertical guide tube 63. The push-pull telescopic rod 76 can be any one of an electric push rod, a pneumatic cylinder, or a hydraulic cylinder. In the initial state, the upper sealing pipe 71 and the lower sealing pipe 72 are sealed and attached to the inner wall of the vertical guide tube 63 and aligned with the sewage discharge gaps 631. The lower openings of both sealing pipes are open. Specifically, when it is necessary to discharge the dust and impurities accumulated on the surface of the funnel filter 62 and the sedimentation impurities in the sedimentation tank 61, the output rod of the push-pull telescopic rod 76 can be extended, causing it to drive the vertical support rod 75 to slide upward in the vertical guide tube 63. At this time, the upper sealing pipe 71 and the lower sealing pipe 72 will rise vertically in the vertical guide tube 63, opening the drain opening 631. Since the surface of the funnel filter 62 is inclined towards the center, and the bottom of the sedimentation tank 61 is also inclined, the dust and impurities accumulated on the funnel filter 62 and the sedimentation impurities at the bottom of the sedimentation tank 61 will pass through the opened drain opening 631. 31 flows into the vertical guide tube 63 and is then discharged and collected through the vertical guide tube 63. Since there is a waste discharge gap between two adjacent support rods 74, when the dust and impurities on the funnel filter screen 62 fall into the vertical guide tube 63, the lower sealing tube 72 supported by the support rods 74 will not interfere with or block the falling dust and impurities. When the output rod of the push telescopic rod 76 is retracted, the lower sealing tube 72 and the upper sealing tube 71 will descend synchronously to block the waste discharge gap 631, thereby blocking the waste discharge gap 631 and enabling the funnel filter screen 62 to normally intercept and filter dust and impurities in the spray water. Simultaneously, the output rod of the push-pull telescopic rod 76 can be controlled to extend and retract intermittently, and work synchronously with the atomizing spray mechanism 4. This eliminates the need for cleaning windows or other structures on the sedimentation tank 61, enabling rapid cleaning and discharge of dust and sediment impurities filtered and intercepted within the sedimentation tank 61. For example, when the cleaning water sprayed by the atomizing spray mechanism 4 accumulates in the sedimentation tank 61, and the water level is higher than the funnel filter screen 62, the output rod of the push-pull telescopic rod 76 can be extended, causing the upper sealing pipe 71 and the lower sealing pipe 72 to open synchronously from the drain opening 631. The cleaning water flows along the surface of the funnel filter screen 62 into the drain opening 631, which facilitates the rapid discharge of particulate impurities accumulated on the surface of the funnel filter screen 62. Similarly, the cleaning water also flows along the bottom of the sedimentation tank 61 to wash away the sedimentation impurities adhering to the bottom of the sedimentation tank 61. After the cleaning water and dust impurities in the sedimentation tank 61 are discharged, the output rod of the push telescopic rod 76 is retracted, so that the upper sealing pipe 71 and the lower sealing pipe 72 seal the drain opening 631, which facilitates the atomizing spray mechanism 4 to continue to inject cleaning water into the sedimentation tank 61 for cleaning. Example

[0026] In a preferred embodiment of the present invention, see [reference needed]. Figures 4-7 As shown, the sealing and guiding assembly 7 also includes a vertical shaft 77, an impeller 78, and scraper blades 79. The top of the vertical duct 63 with the top sealed is equipped with a vertical shaft 77, and the top of the vertical shaft 77 is equipped with an impeller 78. The impeller 78 is aligned with the air outlet of the return air channel 2. Multiple scraper blades 79 are fixedly installed on the outer wall of the vertical duct 63, and the multiple scraper blades 79 are staggered from the drain notch 631. The multiple scraper blades 79 are in contact with the surface of the funnel filter screen 62. It should be noted that the number of scraper blades 79 is preferably four, and they are installed in a circumferential array on the wall of the vertical guide tube 63. The vertical shaft 77 can be connected to the inner wall of the spray tower 3 through at least four brackets to achieve rotational support for the vertical shaft 77. Specifically, when the return air duct 2 delivers return air to the spray tower 3, the return air will drive the aligned impeller 78 to rotate inside the spray tower 3. Consequently, the vertical shaft 77 will drive the vertical duct 63 to rotate inside the sedimentation tank 61. Since the scraper 79 is attached to the surface of the funnel filter screen 62, the rotating vertical duct 63 will drive the scraper 79 to scrape the surface of the funnel filter screen 62, thereby scraping away and cleaning the dust and impurities that have accumulated or adhered to the surface of the funnel filter screen 62, and preventing dust and impurities from clogging the mesh of the funnel filter screen 62.

[0027] In a preferred embodiment of the present invention, see [reference needed]. Figures 4-7As shown, the sealing and conducting assembly 7 further includes a conical sealing plug 791, a waste discharge conduit 792, and a guide slider 793; the conical sealing plug 791 is fixedly installed on the vertical support rod 75, and the conical sealing plug 791 is movably installed at the lower opening of the vertical conduit 63. The waste discharge conduit 792 is connected to the vertical conduit 63 above the conical sealing plug 791. Multiple vertical grooves are opened inside the upper opening of the vertical conduit 63. The guide slider 793 that slides with the vertical grooves is installed on the outer wall of the upper sealing tube 71. The bottom of the vertical support rod 75 is rotatably connected to the output rod of the push telescopic rod 76. It should be noted that the top of the conical sealing plug 791 is a conical part, and its bottom is an annular part, which can seal and fit against the inner wall of the vertical conduit 63, and it is in contact with the bottom of the vertical conduit 63 in the initial state. Specifically, when it is necessary to discharge impurities from the sedimentation tank 61, the suction pipe of the sludge pump is first connected to the waste discharge pipe 792. When the output rod of the push extension rod 76 extends, the vertical support rod 75 will drive the upper sealing pipe 71 and the lower sealing pipe 72 to rise in the vertical pipe 63. At this time, the conical sealing plug 791 will also rise vertically in the vertical pipe 63. When the lower sealing pipe 72 touches the top of the vertical pipe 63, the conical sealing plug 791 rises to its highest position, and the connection between the conical part and the annular part of the conical sealing plug 791 is aligned with the opening of the waste discharge pipe 792. Thus, the impurities that have entered the vertical pipe 63 will enter the waste discharge pipe 792 through the conical sealing plug 791, and then be discharged through the suction pipe. As the output rod of the push-pull telescopic rod 76 is continuously retracted, the conical sealing plug 791 will also descend and contact the lower pipe opening of the vertical guide tube 63. At this time, the vertical support rod 75 will drive the upper sealing pipe 71 and the lower sealing pipe 72 to just block the sewage discharge gap 631, thus facilitating the sedimentation tank to continue to filter and settle the dust of the falling spray water. When the suction pipe is removed from the waste discharge pipe 792, and the return air channel 2 delivers return air to the spray tower 3 for continued dust removal, the vertical pipe 63 rotates in the settling tank. This is achieved through the cooperation of the guide slider 793 and the vertical slide groove. However, since the vertical support rod 75 is rotatably connected to the output rod of the push telescopic rod 76, the push telescopic rod 76, which is in a fixed state, will not interfere with the synchronous rotation of the vertical support rod 75, the upper sealing pipe 71, the lower sealing pipe 72, and the conical sealing plug 791. This effectively prevents the vertical pipe 63 from rotating in the settling tank. If the upper sealing pipe 71 and the lower sealing pipe 72 are in a fixed state, the inner wall of the vertical pipe 63 will rub against the two sealing pipes, which could easily cause wear on the two sealing pipes or the vertical pipe 63. This would affect the sealing effect of the two sealing pipes on the sewage discharge gap 631. At the same time, since the suction pipe is removed from the waste discharge pipe 792, the waste discharge pipe 792 will not interfere with the rotation of the vertical pipe 63.

[0028] In a preferred embodiment of the present invention, see [reference needed]. Figure 2 , Figure 3 and Figure 8 As shown, the circulating heating mechanism 8 includes an inlet pipe 81, a serpentine coil 82, a mounting bracket 83, and an outlet pipe 84. The inlet pipe 81 is detachably connected to the drain pipe on the water tank of the circulating water tank unit 65. The return air channel 2 has a through slot for installing the serpentine coil 82. The serpentine coil 82 is detachably installed in the through slot through the mounting bracket 83. The inlet of the serpentine coil 82 is connected to the inlet pipe 81, and its drain outlet is detachably connected to the guide bend 41 through a three-way valve and the outlet pipe 84. Specifically, the serpentine coil 82 is made of thermally conductive metal and coated with nano-hydrophobic material, making it difficult for moisture and dust in the return air to adhere and reducing dust accumulation. The circulating water in the water tank of the circulating water tank unit 65 is transported to the serpentine coil 82 through the drain pipe and the inlet pipe 81. The waste heat return air flowing in the return air channel 2 comes into contact with the serpentine coil 82, so that the waste heat return air can heat the circulating water flowing in the serpentine coil 82. The circulating water flowing in the serpentine coil 82 is transported to the guide bend 41 through the outlet pipe 84. At the same time, the excess heated circulating water can also be discharged for use through other drain pipes connected to the three-way valve.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A mine waste heat recovery device based on environmental protection, comprising a return air duct connected to a return air shaft and a filter screen installed in the return air duct, characterized in that, Also includes: The spray tower is connected to another opening of the return air duct; The atomizing spraying mechanism is installed inside the spraying tower to atomize and spray dust in the mine return air entering the spraying tower to settle it. The demisting mechanism is installed inside the spray tower and located above the atomizing spray mechanism to remove fine water droplets entrained in the airflow. The spray water circulation mechanism is installed inside the spray tower to settle the spray water falling from the spray and form circulating water. And a circulating heating mechanism, which is installed in the return air duct to heat the circulating water, and delivers part of the heated circulating water to the atomizing spray mechanism and the rest is recycled.

2. The mine waste heat recovery equipment based on environmental protection according to claim 1, characterized in that, The atomizing spray mechanism includes a guide bend, a booster pump, an annular pipe, a diverter pipe, and a high-pressure atomizing nozzle; One port of the guide bend is connected to the circulating heating mechanism. A booster pump is installed on the outside of the spray tower via a fixed plate, and the inlet of the booster pump is connected to the other port of the guide bend. An annular pipe is installed on the outside of the spray tower via a bracket, and the annular pipe is connected to the outlet of the booster pump. Several diversion pipes are laid flat inside the spray tower, and their ports are connected to the annular pipe. Each diversion pipe is equipped with multiple high-pressure atomizing nozzles facing downwards from the spray tower.

3. The mine waste heat recovery equipment based on environmental protection according to claim 1, characterized in that, The demisting mechanism includes a fixed ring, a baffle plate, and a liquid collection conduit. A hollow fixed ring is installed inside the spray tower and is located above the atomizing spray mechanism. Several baffles are installed side by side and in an inclined state inside the fixed ring, and each baffle has a guide groove. The inclined end of each baffle extends into the hollow fixed ring. A liquid collection conduit is connected to the hollow fixed ring, and the liquid collection conduit is connected to the spray water circulation mechanism.

4. The mine waste heat recovery equipment based on environmental protection according to claim 1, characterized in that, The spray water circulation mechanism includes a sedimentation tank, a funnel filter screen, a vertical guide pipe, a sealing and connecting component, a central guide pipe, a circulating water tank unit, a first diversion pipe, and a drain pipe; The bottom of the spray tower is connected to a cone-shaped sedimentation tank, and a funnel-shaped filter screen is fixedly installed inside the sedimentation tank. A vertical guide pipe is installed vertically in the middle of the funnel-shaped filter screen, and the lower end of the vertical guide pipe extends outside the sedimentation tank. A sealing and conductive component is installed inside the vertical guide pipe. The middle guide pipe connects to the tank wall between the bottom of the sedimentation tank and the funnel-shaped filter screen, and the outer end of the middle guide pipe connects to a circulating water tank unit outside the spray tank. The outlet of the circulating water pump of the circulating water tank unit is connected to the circulating heating mechanism through a first diversion pipe, and a liquid collection pipe and a liquid discharge pipe are connected to the water tank body of the circulating water tank unit.

5. The mine waste heat recovery equipment based on environmental protection according to claim 4, characterized in that, The sealing and conducting assembly includes an upper sealing tube, a lower sealing tube, a sealing disc, a support rod, a vertical support rod, and a push-and-extension rod. The vertical guide tube has two sets of multiple drainage holes along its vertical direction. The upper set of drainage holes is flush with the center mesh of the funnel filter, while the lower set is flush with the bottom of the sedimentation tank. An upper sealing tube and a lower sealing tube are movably installed inside the vertical guide tube. The upper sealing tube is movably aligned with the upper set of drainage holes, and the lower sealing tube is movably aligned with the lower set of drainage holes. A sealing disc is installed at the upper opening of the upper sealing tube, and multiple support rods are fixedly installed at the upper opening of the lower sealing tube. A vertical support rod is movably installed inside the vertical guide tube and is connected to the sealing disc and the multiple support rods respectively. A push-pull telescopic rod is fixedly installed below the sedimentation tank, and the output rod of the push-pull telescopic rod is connected to the vertical support rod.

6. The mine waste heat recovery equipment based on environmental protection according to claim 5, characterized in that, The sealing and guiding assembly also includes a vertical shaft, an impeller, and scrapers. The top of the vertical duct with the top sealed is equipped with a vertical shaft, and an impeller is installed on the top of the vertical shaft. The impeller is aligned with the air outlet of the return air channel. Multiple scrapers are fixedly installed on the outer wall of the vertical duct, and the multiple scrapers are staggered from the sewage discharge notch. The multiple scrapers are in contact with the surface of the funnel filter screen.

7. A mine waste heat recovery device based on environmental protection according to claim 6, characterized in that, The sealing and guiding assembly also includes a conical sealing plug, a waste discharge conduit, and a guide slider; the conical sealing plug is fixedly installed on the vertical support rod, and the conical sealing plug is movably installed at the lower opening of the vertical conduit. The waste discharge conduit is connected to the vertical conduit above the conical sealing plug. Multiple vertical grooves are opened inside the upper opening of the vertical conduit. A guide slider that slides with the vertical grooves is installed on the outer wall of the upper sealing tube. The bottom of the vertical support rod is rotatably connected to the output rod of the push telescopic rod.

8. A mine waste heat recovery device based on environmental protection according to claim 4, characterized in that, The circulating heating mechanism includes an inlet pipe, a serpentine coil, a mounting bracket, and an outlet pipe. The inlet pipe is detachably connected to the drain pipe on the water tank of the circulating water tank unit. A through slot is provided on the return air duct for installing the serpentine coil. The serpentine coil is detachably installed in the through slot via the mounting bracket. The inlet of the serpentine coil is connected to the inlet pipe, and its outlet is detachably connected to the guide bend via a three-way valve and the outlet pipe.

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