WO2023109234A1 - Zero-power-consumption multi-path carbon dioxide recovery device in coal mine air shaft - Google Patents

Abstract

Disclosed is a zero-power-consumption multi-path carbon dioxide recovery device in a coal mine air shaft, the device comprising an air shaft (1), dust cleaners (6), gas collection chambers (4) and carbon dioxide condensation mechanisms (2), wherein a peripheral side of a side wall of the air shaft (1) is provided with a plurality of adjustable variable-speed air ducts (3) in communication with the air shaft; and each adjustable variable-speed air duct (3) has a diameter gradually decreasing from an air inlet to an air outlet thereof, the dust cleaner (6) is connected to an air outlet of the adjustable variable-speed air duct (3), the gas collection chamber (4) is connected to the dust cleaner (6), and the carbon dioxide condensation mechanism (2) is connected to the gas collection chamber (4) for condensing the received dried airflow, so that carbon dioxide in the airflow is condensed into liquid carbon dioxide. The airflow is initially cooled by means of the adjustable variable-speed air duct and then sequentially cooled by means of the dust cleaner and the gas collection chamber, and then the dried airflow after three times of cooling is introduced into the carbon dioxide condensation mechanism for condensation, so that the condensation effect of carbon dioxide is improved.

Description

A multi-channel recovery device for carbon dioxide without power consumption in coal mine air shaft

Cross References to Related Applications

This application requires the Chinese patent filed by Tiandi Science and Technology Co., Ltd. and China Coal Mining Research Institute Co., Ltd. on December 14, 2021, and the invention title is "a multi-channel recovery device for carbon dioxide without power consumption in coal mine air shafts", Priority of application number "202111529663.9".

technical field

The invention relates to the technical field of coal mines, in particular to a multi-channel recovery device for carbon dioxide without power consumption in coal mine air shafts.

Background technique

In the coal mining industry, there is a large amount of carbon dioxide in the airflow of the coal mine air shaft, and the direct discharge into the air not only causes serious pollution to the environment, aggravates the greenhouse effect, but also greatly wastes the use value of carbon dioxide. A large waste of energy, so it is necessary to recover the carbon dioxide in the airflow discharged from the coal mine air shaft. Since the temperature of the airflow discharged from the coal mine air shaft reaches 30-40 ° C, directly condensing the airflow to recover the carbon dioxide will cause the carbon dioxide condensation effect to be relatively poor. Difference.

Contents of the invention

This application aims to solve one of the technical problems in the related art at least to a certain extent.

For this reason, the purpose of this application is to propose a non-power consumption carbon dioxide multi-channel recovery device in a coal mine air shaft. The adjustable variable speed air duct is processed to improve the processing efficiency. At the same time, the adjustable variable speed air duct can realize the initial cooling of the airflow temperature, and then enter the dust collector to cool down again through the cold air flow into the dust collector. The airflow after dust removal is in the air collection chamber The temperature is lowered again through the cold air flow in the middle, and the dry air flow after three times of cooling is passed into the carbon dioxide condensing mechanism for condensation, which improves the condensation effect of carbon dioxide, and the cold air flow in the carbon dioxide condensing mechanism can be directly used in the dust collector and the gas collection chamber Condensation to achieve energy recycling, and after part of the cold air flows into the dust collector, it will be condensed again to achieve full condensation recovery of the air flow.

In order to achieve the above purpose, a multi-channel recovery device for carbon dioxide without power consumption in a coal mine air shaft proposed by this application includes:

An air shaft, the side wall of the air shaft is provided with a plurality of adjustable speed-changing air ducts communicating with the air shaft, and the path of the adjustable speed-changing air ducts is along the progress of the adjustable speed-changing air ducts. The direction from the air port to the air outlet gradually decreases, so that the air flow in the air shaft enters the adjustable variable speed air channel for speed-up condensation;

a dust remover, the dust remover is connected to the air outlet of the adjustable variable speed air duct, and is used to remove dust from the air flow entering the dust remover;

a gas collection chamber, the gas collection chamber is connected to the dust remover, and is used to dry the received airflow after dust removal;

a carbon dioxide condensing mechanism, the carbon dioxide condensing mechanism is connected to the gas collection chamber, and is used to condense the received dried airflow, so that the carbon dioxide in the airflow is condensed into liquid carbon dioxide;

A carbon dioxide collection box, the carbon dioxide collection box is connected with the carbon dioxide condensing mechanism for receiving condensed liquid carbon dioxide, and the carbon dioxide collection box is respectively connected with the gas collection chamber and the dust collector to utilize the carbon dioxide Part of the cool air discharged from the collection box cools down the air collection chamber and the dust collector.

Further, the top of the adjustable variable speed air duct has a mounting hole, the top of the adjustable variable speed air duct is provided with a jack, the power output end of the jack is provided with a valve, and the valve is located in the installation hole , to use the jack to control the valve to move up and down in the installation hole to realize the control of the air flow through the adjustable variable speed air duct;

The top of the air shaft is provided with an explosion-proof damper.

Further, the carbon dioxide condensing mechanism includes a cold and hot separator, and a cold exchanger is sheathed outside the cold end of the cold and hot separator, and the cold exchanger is used to transfer heat to the cold end, so that the The flowing water in the cold exchanger cools down;

The hot end of the cold and hot separator is covered with a heat exchanger, which is used to reduce the temperature of the hot end and use the hot end to heat the flowing water in the heat exchanger;

The cold end is connected to the carbon dioxide collection box for collecting the liquid carbon dioxide generated by the cold end, and at the same time, the cold air blown from the cold end flows into the carbon dioxide collection box.

Further, the cold end of the cold and heat separator includes a connecting pipe and a first horn tube and a second horn tube arranged at both ends of the connecting tube, the large mouth end of the first horn tube and the large mouth of the second horn tube The ends are respectively connected to the two ends of the connecting pipe, and the connecting pipe is provided with a _CO2 condensate collection pipe communicating with the connecting pipe, and the _CO2 condensate collection pipe is connected to the carbon dioxide collection box connect.

Further, the hot end of the cold and heat separator includes a heat pipe connected to the small end of the second horn tube, the heat exchanger is sleeved outside the heat pipe, and the heat pipe is connected to the second There are a plurality of ventilation holes on the side wall of the connecting end of the trumpet tube, the air intake direction of the ventilation holes is set along the tangential direction of the heat pipe, and the ventilation holes are set to gradually decrease from the outside to the inside of the heat pipe. Tapered holes for passing the dried air flow into the heat pipe through the vent holes.

Further, a temporary gas storage chamber is sheathed on the outside of the second trumpet tube, and both the vent hole and the cold exchanger are located in the temporary gas storage chamber, so that the dry air entering the temporary gas storage chamber After the airflow is preliminarily cooled, it enters the heat pipe through the air hole.

Further, the dust remover is provided with a mist nozzle, and the water supply pipe of the mist nozzle is connected with the cold exchanger, so that the cooling water in the cold exchanger can be sprayed into the air through the mist nozzle. In the dust collector.

Further, multiple layers of desiccant interlayers are arranged in the air collection chamber from top to bottom, so that the airflow after dust removal enters from the bottom of the air collection chamber and passes through multiple layers of desiccant interlayers for drying. Then pass into the carbon dioxide condensation mechanism from the top of the gas collection chamber;

The middle part of the air collection chamber is provided with a cold air pipe, and the cold air pipe passes through the middle part of the multi-layer desiccant compartment from top to bottom in sequence, and the cold air pipe is located in the upper space of the topmost desiccant compartment set in a helical shape.

Further, the air outlet of the adjustable variable speed air duct, the air outlet of the dust collector and the air outlet of the air collection chamber are all provided with explosion-proof waterproof diversion fans, and the explosion-proof waterproof diversion fans The fan is connected to a thermoelectric generator, so as to use the thermoelectric generator to supply power to the flameproof waterproof diversion fan;

The thermoelectric generator is respectively connected with the carbon dioxide collection box and the hot end, so as to generate electricity by using the temperature difference between the cold air flow in the carbon dioxide collection box and the hot air flow discharged from the hot end.

Further, the thermoelectric generator includes:

A cold air chamber, the cold air chamber includes a cold air inner pipe and a cold air outer chamber covering the outside of the cold air inner pipe, and the end of the cold air inner pipe away from the cold air inlet is provided with a first channel that communicates with the cold air outer chamber hole, the end of the cold air outer cavity away from the first through hole is provided with a second through hole, and the cold air inlet is connected with the carbon dioxide collection box to pass through the cold air inlet into the The cold air flow in the cold air inner pipeline enters the cold air outer cavity through the first through hole and flows out through the second through hole;

A hot air chamber, the hot air chamber includes a hot air inner chamber wrapped outside the cold air outer chamber, a hot air inlet is provided at the end of the hot air inner chamber far away from the cold air inlet, and the outside of the hot air inner chamber Covered with a hot gas outer cavity, the end of the hot gas inner cavity away from the hot gas inlet is connected to the hot gas outer cavity, and the end of the hot gas outer cavity close to the hot gas inlet is provided with a third through hole, so The hot air inlet is connected to the hot end, so that the hot air at the hot end passes through the hot air inlet at one end of the hot air cavity into the hot gas inner cavity, and then flows from the other end of the hot gas inner cavity. After entering the outer cavity of the hot gas, it flows out through the third through hole.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a partial structural schematic diagram of a non-power consumption carbon dioxide multi-channel recovery device in a coal mine air shaft proposed by an embodiment of the present application;

Fig. 2 is the partial structure schematic diagram of non-power consumption carbon dioxide multi-channel recovery device in the coal mine wind shaft that this application proposes;

Fig. 3 is a schematic diagram of the structure of the adjustable variable speed air duct of the present application;

Fig. 4 is a schematic structural diagram of the carbon dioxide condensation mechanism of the present application;

Fig. 5 is a partial structural schematic diagram of Fig. 4 of the present application;

Fig. 6 is a partial structural schematic diagram of Fig. 4 of the present application;

Fig. 7 is the structural representation of the carbon dioxide collection box of the present application;

Fig. 8 is a schematic structural view of the gas collection chamber of the present application;

Fig. 9 is a sectional view of the A-A direction in Fig. 8 of the present application;

Fig. 10 is a schematic diagram of a partial structure of a thermoelectric generator of the present application.

In the figure, 1, air shaft; 2, carbon dioxide condensation mechanism; 21, cold and hot separator; 22, cold exchanger; 23, heat exchanger; 24, cold end; 243, _CO condensate collection pipe; 244, connection Tube; 245, the first horn tube; 246, the second horn tube; 247, hot end flow regulator; 25, hot end; 251, hot pipe; 252, air hole; 253, fixed plate; 26, gas temporary storage room ;3. Adjustable variable speed air duct; 31. Jack; 32. Valve; 4. Gathering chamber; 41. Desiccant compartment; 42. Air-conditioning pipe; 43. Spiral; 44. Fan-shaped unit; 5. Carbon dioxide collection box ;51, box body; 52, air-conditioning inlet pipe; 53, air outlet pipe; 54, dust collector air-conditioning pipe; 55, _CO2 condensate delivery pipe; 6, dust collector; 7, explosion-proof damper; 9. Thermoelectric generator; 91. Cold air inner pipe; 911. First through hole; 912. Cold air inlet; 92. Cold air outer chamber; 93. Hot air inner chamber; 931. Hot air inlet; 94. Hot air outer chamber ; 95, thermoelectric generating sheet; 96, cold air outer pipe; 961, first annular end cover; 962, end cover plate; 97, hot gas inner pipe; 971, third annular end cover; 98, hot air outer pipe; 981 , the second annular end cap; 982, the fourth annular end cap.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, are only for explaining the present application, and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

Fig. 1 is a schematic structural diagram of a non-power consumption carbon dioxide multi-channel recovery device in a coal mine air shaft proposed by an embodiment of the present application.

Referring to Fig. 1-10, a non-power consumption carbon dioxide multi-channel recovery device in a coal mine air shaft includes an air shaft 1, a carbon dioxide condensation mechanism 2, a gas collection chamber 4, a carbon dioxide collection box 5 and a dust collector 6, and the side wall of the air shaft 1 The surrounding side is provided with a plurality of adjustable speed-changing air ducts 3 communicating with the air shaft 1, and the diameter of the adjustable speed-changing air ducts 3 gradually decreases along the direction from the air inlet to the air outlet of the adjustable speed-changing air ducts 3, so that The airflow in the air shaft 1 enters the adjustable variable speed air channel 3 for speed-up condensation. Specifically, by opening an air outlet on the side wall of the air shaft 1 and installing an adjustable variable speed air channel 3 at the air outlet, the adjustable variable speed The air duct 3 is provided with a trumpet shape, and the large end of the adjustable variable speed air duct 3 is arranged on the side wall of the air shaft 1, so that the air flow in the air shaft 1 enters the adjustable variable speed air duct 3 due to the passage of the air flow along the direction of motion. The diameter becomes smaller, and then the speed of the airflow entering the adjustable variable speed air duct 3 is gradually increased, and the preliminary cooling and condensation of the airflow is realized.

It should be noted that a plurality of adjustable speed-changing air passages 3 can be set on the peripheral side of the air shaft 1, that is to say, four adjustable speed-changing air passages 3 can be arranged at equal angles on the peripheral side of the air shaft 1, so that the air shaft The airflow in 1 can be discharged through four adjustable speed-changing air ducts 3, and setting multiple adjustable speed-changing air ducts 3 can speed up the recovery of carbon dioxide in the airflow in the air shaft.

The dust collector 6 is connected with the air outlet of the adjustable variable speed air duct 3, and is used to remove dust from the airflow entering the dust collector 6; the gas collection chamber 4 is connected with the dust collector 6, and is used to dry the received airflow after dust removal The carbon dioxide condensing mechanism 2 is connected with the gas collection chamber 4, and is used to condense the received dried air flow, so that the carbon dioxide in the air flow is condensed into liquid carbon dioxide, and the dust and The water vapor content is all reduced, which will not affect the subsequent recovery of carbon dioxide.

In addition, the carbon dioxide collection box 5 is connected with the carbon dioxide condensing mechanism 2 for receiving condensed liquid carbon dioxide, and the carbon dioxide collection box 5 is connected with the gas collection chamber 4 and the dust collector 6 respectively to utilize part of the cold air discharged from the carbon dioxide collection box 5 The temperature of the gas collection chamber 4 and the dust collector 6 is lowered, so that the air flow is initially cooled in the gas collection chamber 4 and the dust collector 6, the temperature of the air flow entering the carbon dioxide condensation mechanism 2 is reduced, and the condensation effect of carbon dioxide is enhanced.

In detail, the temperature of the airflow in the air shaft 1 is generally 30-40°C, and it contains a large amount of dust. In order to improve the recovery of carbon dioxide in the air flow in the air shaft 1, multiple adjustable Variable-speed air duct 3, so that the airflow in the air shaft 1 is dispersed in multiple adjustable variable-speed air ducts 3 for processing. By setting the structure of the adjustable variable-speed air duct 3, the temperature of the airflow is initially cooled due to acceleration, and then enters the dust collector 6 When dust removal is performed in the dust remover 6, the temperature is lowered again by the cold air flow passed into the dust collector 6. During the drying process of the dust-removed air flow in the gas collection chamber 4, the temperature is lowered again by the cold air flow, and the dry air flow after three times of cooling is passed into Condensation is carried out in the carbon dioxide condensing mechanism 2, which improves the condensation effect of carbon dioxide, and the cold air flow in the carbon dioxide condensing mechanism 2 can be directly used for condensation in the dust collector 6 and the gas collection chamber 4, realizing energy recycling, and part of the cold air circulation After entering the deduster 6, the circulation condensation is carried out again to realize the sufficient condensation recovery of the airflow.

In some embodiments, the top of the adjustable variable speed air duct 3 has a mounting hole, the top of the adjustable variable speed air duct 3 is provided with a jack 31, the power output end of the jack 31 is provided with a valve 32, and the valve 32 is located in the installation hole. The control of the air flow through the adjustable variable speed air duct 3 is realized by using the jack 31 to control the valve 32 to move up and down in the installation hole. The top of the air shaft 1 is provided with an explosion-proof damper 7, which needs to control the CO in the air flow discharged from the air shaft 1. ₂ When capturing, the explosion-proof damper 7 is in the closed state, and the air shaft 1 is ventilated by 3 adjustable variable-speed air ducts to capture _CO2 , and the number of _CO2 capture channels can be controlled by controlling the opening and closing of the valve 32. When multiple channels are recovered at the same time, the valves 32 of the multi-channel adjustable variable speed air duct 3 can all be opened. 7 is opened, and the air shaft 1 is ventilated by the opened explosion-proof damper 7.

In some embodiments, the carbon dioxide condensing mechanism 2 includes a cold and hot separator 21, and a cold exchanger 22 is sheathed outside the cold end 24 of the cold and hot separator 21, and the cold exchanger 22 is used to transfer heat to the cold end 24, so as to To cool down the flowing water in the cold exchanger 22, the hot end 25 of the cold and hot separator is provided with a heat exchanger 23, which is used to reduce the temperature of the hot end 25 and utilize the hot end 25 to heat the flowing water in the heat exchanger 23, specifically Generally speaking, the cold exchanger 22 is a helical tube coiled at the cold end 24. Since the temperature of the cold end 24 is relatively low, icing will occur outside the cold end 24, and deicing needs to be carried out frequently. The external coiled spiral tube is used as the cold exchanger 22. By passing water into the spiral tube, the heat of the water in the spiral tube can be exchanged to the cold end 24 to realize continuous heat exchange to the cold end 24, which can prevent the cold end 24 from freezing outside. At the same time, when the water in the spiral tube transfers heat to the cold end 24, the water temperature in the spiral tube will also decrease. The water in the spiral tube in the exchanger 23 reduces the temperature of the airflow entering the hot end 25, thereby reducing the temperature of the airflow entering the cold end 24, so that the condensation effect is better, and at the same time, the heat is transferred to the hot end 25 heat exchanger 23, so that the temperature of the water in the spiral tube of the heat exchanger 23 increases.

In addition, the cold end 24 is connected to the carbon dioxide collection box 5, which is used to collect the liquid carbon dioxide produced by the cold end 24. At the same time, the cold air blown out by the cold end 24 flows into the carbon dioxide collection box 5, so that the carbon dioxide collection box 5 can be cooled to prevent The heat outside the carbon dioxide collection box 5 is transmitted to the carbon dioxide collection box 5, which affects the liquid carbon dioxide stored therein, and the cold airflow entering the carbon dioxide collection box 5 can be passed into the gas collection chamber 4 and the dust collector 6 for cooling.

In some embodiments, there may be various structures of the cold end 24 of the cold and heat separator.

As a possible structure, the cold end includes a connecting pipe 244 and a first horn tube 245 and a second horn tube 246 arranged at the two ends of the connecting tube 244, the large mouth end of the first horn tube 245 and the large mouth end of the second horn tube 246 Be connected with the two ends of the connecting pipe 244 respectively, the connecting pipe 244 is provided with the _CO condensate collection pipe 243 communicated with the connecting pipe 244, the _CO condensate collection pipe 243 is connected with the carbon dioxide collection box 5, due to the second The diameter of the trumpet tube 246 gradually increases with the outflow of the dry gas flow, which can further reduce the temperature of the airflow coming out of the second horn tube 246, so as to produce more liquid CO ₂ , and the diameter of the first horn tube 245 flows out with the gas Tapered to allow more liquid CO ₂ to be collected.

In addition, the hot end 25 includes a heat pipe 251 connected to the small mouth end of the second trumpet tube 246, the heat exchanger 23 is sleeved outside the heat pipe 251, and the circulating water inside the spiral pipe of the heat exchanger 23 performs heat exchange through the heat end 25. After heating, it can be used for bathing water heating or radiator heating. The side wall of the end where the hot pipe 251 is connected to the second trumpet pipe 246 has a plurality of ventilation holes 252, and the other end is provided with a hot end flow regulator 247. The hot end flow rate The regulator 247 can adjust the opening and closing degree of the outlet of the hot end according to the needs, and is used to control the cooling effect of the cold and hot separator. The pipe 251 enters in a tangential direction, forming a high-speed rotating vortex at one end of the heat pipe 251, and the vent hole 252 is set as a tapered hole that gradually decreases from the outside to the inside of the heat pipe 251, so that the dry air flows in through the vent 252. In the hot pipe 251, that is to say, the vent hole 252 is a tapered hole, and the inlet end of the tapered hole is a large mouth section, so that after the dry air enters the vent hole 252, the diameter of the vent hole 252 decreases, so that The flow velocity of the dry gas flow in the vent hole 252 gradually increases, thereby enhancing the CO ₂ condensation effect.

It should be explained in detail that a fixed plate 253 is fixed on one end of the heat pipe 251, and a through hole is opened in the middle of the fixed plate 253. The diameters of the holes are the same, so that a step is naturally formed between the second trumpet pipe 246 and the hot pipe 251 to prevent the hot flow gas from moving to the cold end.

In some embodiments, the second trumpet tube 246 is sheathed with a gas temporary storage chamber 26, and the vent hole 252 and the cold exchanger 22 are located in the gas temporary storage chamber 26, and the dry air flows into the gas temporary storage chamber 26 for preliminary After cooling, it enters the hot pipe 251 through the air hole 252. Specifically, by setting the gas temporary storage room 26, the dry air flow first enters the gas temporary storage room 26. Since the gas temporary storage room is sleeved outside the cold end, it makes it possible to enter The gas in the gas temporary storage chamber 26 is initially condensed, and then the temperature of the gas flow entering the cold and hot separator is increased, thereby enhancing the CO ₂ condensation effect.

It should be noted that there may be various structures of the carbon dioxide collection box 5 .

As a possible structure, the carbon dioxide collection box 5 includes a box body 51, and the top of the box body 51 is provided with a cold air inlet pipe 52. The cold air inlet pipe 52 is a tapered structure, and the small mouth end of the tapered structure is a cold air inlet. The lower mouth end of the first trumpet pipe 245 is connected to each other, and by being set into a tapered structure, the side wall top of the carbon dioxide collection box 5 is provided with the outlet pipe 53 that communicates with the carbon dioxide collection box 5 simultaneously, and the outlet pipe 53 is arranged obliquely upwards, and then can Prevent the liquid carbon dioxide in the carbon dioxide collection box 5 from escaping outwards, and the cold air flow passed into the carbon dioxide collection box 5 is discharged through the air outlet pipe 53, and the dust collector cold air pipe 54 connected with the air outlet pipe 53 is provided on the air outlet pipe 53 at the same time , the dust collector cold air pipe 54 is connected to the dust collector 6, and part of the cold air flow passes through the dust collector cold air pipe 54 and enters the dust collector 6 to cool down the air flow in the dust collector 6, and can realize the circulation condensation of part of the cold air flow, and at the same time, The gas pipe 53 is connected to the gas collection chamber 4, so that part of the cold air flows into the gas collection chamber 4, and the CO ₂ condensate delivery pipe 55 communicating with the CO ₂ condensate collection pipe 243 is provided on the side wall of the box body 51 .

In some embodiments, the dust collector 6 is provided with a mist nozzle, and the water supply pipe of the mist nozzle is connected to the cold exchanger 22, so that the cooling water in the cold exchanger 22 is sprayed into the dust collector 6 through the mist nozzle. Because the water flow in the cold exchanger 22 passes through the cold end 24 for heat exchange, the water flow in the cold exchanger 22 is cooled, and the cooled water flow is directly sprayed into the dust collector 6 through the mist nozzle, and the water flow in the air flow is captured by atomized water. dust, and the airflow is cooled again.

In some embodiments, multi-layer desiccant interlayers 41 are arranged in the air collection chamber 4 from top to bottom, so that the airflow after dedusting enters from the bottom of the air collection chamber 4 and passes through the multi-layer desiccant interlayers 41 for drying. The carbon dioxide condensation mechanism 2 is introduced from the top of the gas collection chamber 4, that is to say, the gas collection chamber 4 can be set as a cylindrical structure, and then a plurality of supporting plates are evenly distributed on the inner wall of the gas collection chamber 4 at the same height, and the desiccant is separated The layer 41 is arranged on a plurality of pallets and supported by the pallets. At the same time, the desiccant interlayer 41 can be divided into a plurality of fan-shaped units 44, and each fan-shaped unit 44 is sealed so that the air flow after dust removal will not Flow out between two fan-shaped units 44, meanwhile, between each fan-shaped unit 44 and the sidewall of the plenum chamber 4 are also sealed, in addition, in order to reduce the temperature of the air-flow in the plenum chamber 4, the A cold air pipe 42 is arranged in the middle of the uppermost layer of the desiccant interlayer 41. The cold air pipe 42 passes through the middle of the multi-layer desiccant interlayer 41 sequentially. Said, one end of each fan-shaped unit 44 has an arc-shaped hole, so that the desiccant interlayer 41 composed of a plurality of fan-shaped units 44 is an annular structure, and the outer circular side wall of the desiccant interlayer 41 of the annular structure and the gas collection chamber 4 The inner wall of the desiccant interlayer 41 is sealed and connected with the side wall of the cold air pipe 42 to prevent the airflow from overflowing from the joint, and the temperature in the gas collection chamber 4 can be reduced by setting the cold air pipe 42. By setting the desiccant interlayer 41 as a plurality of fan-shaped units 44, it is convenient to replace each fan-shaped unit 44, and the cold air pipe 42 is connected with the carbon dioxide collection box 5, that is to say, the cold air pipe 42 is connected with the air outlet pipe 53, which can The cold air in the carbon dioxide collection box 5 flows into the cold air pipe 42 to cool down the gas collection chamber 4 .

In some embodiments, in order to increase the flow velocity of the airflow and realize the further cooling of the airflow, explosion-proof Type waterproof diversion fan 8, explosion-proof waterproof diversion fan 8 is connected with thermoelectric generator 9, to utilize thermoelectric generator 9 to supply power for explosion-proof waterproof diversion fan 8, and thermoelectric generator 9 is connected with carbon dioxide collection box 5 and The hot end 25 is connected to generate electricity by using the temperature difference between the cold air flow in the carbon dioxide collection box 5 and the hot air flow discharged from the hot end 25, that is, the thermoelectric generator 9 is connected with the outlet pipe 53 of the carbon dioxide collection box 5 , is used to flow part of the cold air into the thermoelectric generator 9, and at the same time, the hot air flow generated by the hot end 25 also passes through the thermoelectric generator 9, and realizes power generation through the temperature difference between the cold air flow and the hot air flow, and is set at the outlet of the gas collection chamber 4 The explosion-proof waterproof diversion fan 8 makes up for the reduction in wind speed caused by the air passing through the multi-layer desiccant interlayer 41 .

It should be noted that there are various structures of the thermoelectric generator 9 capable of realizing thermoelectric power generation.

As a possible mechanism, the thermoelectric generator 9 includes a cold air chamber and a hot air chamber. The cold air chamber includes a cold air inner pipe 91 and a cold air outer chamber 92 wrapped outside the cold air inner pipe 91. The outer cold air chamber 92 is equipped with a thermoelectric generator. Sheet 95, one end of the cold air inner pipe 91 away from the cold air inlet 912 of the cold air inner pipe 91 is provided with a first through hole 911 communicating with the cold air outer chamber 92, and the end of the cold air outer chamber 92 away from the first through hole 911 is provided with The second through hole, the cold air inlet 912 is connected with the carbon dioxide collection box 5, that is to say, the cold air inlet 912 is connected with the outlet pipe 53 of the carbon dioxide collection box 5, so as to pass into the cold air inner pipeline through the cold air inlet 912 The cold air in 91 enters the cold air outer cavity 92 through the first through hole 911 and then flows out through the second through hole. The cold air storage space and the cold air flow time are increased by using the pipe 91 and the cold air outer chamber 92 wrapped outside the cold air inner pipe 91 , to ensure that the cold air inside the pipeline 91 is relatively constant, and improve the power generation effect of the thermoelectric generator.

In addition, the hot air chamber includes a hot air inner chamber 93 wrapped outside the cold air outer chamber 92. The end of the hot air inner chamber 93 away from the cold air inlet 912 is provided with a hot air inlet 931. The outer part of the hot air inner chamber 93 is covered with a hot air outer chamber. Cavity 94, the end of the hot gas inner cavity 93 away from the hot gas inlet 931 is connected with the hot gas outer cavity 94, and the end of the hot gas outer cavity 94 near the hot gas inlet 931 is provided with a third through hole, and the hot gas inlet 931 is connected with the hot end 25 , so that the hot gas flow at the hot end 25 passes into the hot gas inner cavity 93 through the hot gas inlet 931 at one end of the hot gas inner cavity 93, and then enters the hot gas outer cavity 94 from the other end of the hot gas inner cavity 93 and passes through the third through hole flow out. The hot gas outer cavity 94 wrapped outside the hot gas inner cavity 93 ensures a constant temperature of the hot gas inner cavity 93, prevents heat exchange between the exposed outer wall of the hot gas inner cavity 93 and the external environment, and reduces the temperature of the hot gas inside the hot gas inner cavity 93, thereby reducing the power generation effect . In detail, the cold air chamber includes a cold air inner pipe 91 and a cold air outer pipe 96 sleeved outside the cold air inner pipe 91 , and is located between the outer wall of one end of the cold air inlet 912 of the cold air inner pipe 91 and the inner wall of one end of the cold air outer pipe 96 Connected with a first annular end cover 961, the other end of the cold air inner pipeline 91 and the other end of the cold air outer pipeline 96 are fixed on the end cover plate 962, the cold air inner pipeline 91, the cold air outer pipeline 96, the end cover plate 962 and the first A cold air outer chamber 92 is formed between the ring-shaped end covers 961, the outer wall of the cold air outer pipe 96 and the outer wall of the end cover plate 962 are equipped with thermoelectric power generation sheets 95, and the side wall of the inner cold air pipe 91 close to the end cover plate 962 is evenly distributed. There are a number of first through holes 911, a number of second through holes are opened on the first annular end cover 961, the cold air inlet 912 is connected to the air outlet pipe 53, and the hot air chamber includes a hot air inner pipe 97 and a hot air inner pipe 97 The outer hot gas outer pipeline 98 is connected with a second annular end cover 981 between the outer wall of the hot gas inlet 931 of the hot gas inner pipeline 97 and the hot gas outer pipeline 98, and the hot gas inner pipeline 97 is sleeved outside the cold air outer pipeline 96. , a third annular end cover 971 is connected between the outer wall of the cold air outer pipe 96 and the inner wall of the hot air inner pipe 97 away from the end of the second annular end cover 981, the cold air outer pipe 96, the hot air inner pipe 97, and the third annular end A hot air inner chamber 93 is enclosed between the covers 971, a fourth annular end cover 982 is connected between the outer wall of the cold air outer pipe 96 and the inner wall of the end of the hot air outer pipe 98 close to the third annular end cover 971, and the inner hot air pipe 97, A hot gas outer cavity 94 is formed between the hot gas outer pipeline 98, the cold air outer pipeline 96, the second annular end cover 981, the third annular end cover 971 and the fourth annular end cover 982, the second annular end cover 981 and the fourth annular end cover 982. The third annular end cover 971 is respectively provided with a number of third through holes and fourth through holes 972, the hot air inlet 931 is connected to the hot end 25, and the hot air flow in the hot gas inner cavity 93 is passed through the hot air inlet 931 The hot gas enters the outer cavity 94 through the fourth through hole 972 and then flows out through the third through hole.

It should be noted that, in the description of the present application, terms such as "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the present application includes additional implementations in which functions may be performed out of the order shown or discussed, including in substantially simultaneous fashion or in reverse order depending on the functions involved, which shall It should be understood by those skilled in the art to which the embodiments of the present application belong.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, schematic representations 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 any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. A multi-channel recovery device for carbon dioxide without power consumption in a coal mine air shaft, characterized in that it includes:

   An air shaft, the side wall of the air shaft is provided with a plurality of adjustable speed-changing air ducts communicating with the air shaft, and the path of the adjustable speed-changing air ducts is along the progress of the adjustable speed-changing air ducts. The direction from the air port to the air outlet gradually decreases, so that the air flow in the air shaft enters the adjustable variable speed air channel for speed-up condensation;

   a dust remover, the dust remover is connected to the air outlet of the adjustable variable speed air duct, and is used to remove dust from the air flow entering the dust remover;

   a gas collection chamber, the gas collection chamber is connected to the dust remover, and is used to dry the received airflow after dust removal;

   a carbon dioxide condensing mechanism, the carbon dioxide condensing mechanism is connected to the gas collection chamber, and is used to condense the received dried airflow, so that the carbon dioxide in the airflow is condensed into liquid carbon dioxide;

   A carbon dioxide collection box, the carbon dioxide collection box is connected with the carbon dioxide condensing mechanism for receiving condensed liquid carbon dioxide, and the carbon dioxide collection box is respectively connected with the gas collection chamber and the dust collector to utilize the carbon dioxide Part of the cool air discharged from the collection box cools down the air collection chamber and the dust collector.
2. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 1, characterized in that, the top of the adjustable variable speed air duct is provided with a mounting hole, and the top of the adjustable variable speed air duct is provided with a jack, The power output end of the jack is provided with a valve, and the valve is located in the installation hole, so as to use the jack to control the valve to move up and down in the installation hole to realize the air flow through the adjustable variable speed air duct control;

   The top of the air shaft is provided with an explosion-proof damper.
3. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 1, wherein the carbon dioxide condensing mechanism includes a cold and hot separator, and a cold exchanger is sheathed outside the cold end of the cold and hot separator , the cold exchanger is used to transfer heat to the cold end, so as to cool down the flowing water in the cold exchanger;

   The hot end of the cold and hot separator is covered with a heat exchanger, which is used to reduce the temperature of the hot end and use the hot end to heat the flowing water in the heat exchanger;

   The cold end is connected to the carbon dioxide collection box for collecting the liquid carbon dioxide generated by the cold end, and at the same time, the cold air blown from the cold end flows into the carbon dioxide collection box.
4. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 3, wherein the cold end of the cold and heat separator includes a connecting pipe and a first horn pipe and a second horn arranged at both ends of the connecting pipe tube, the large mouth end of the first horn tube and the big mouth end of the second horn tube are respectively connected to the two ends of the connecting pipe, and the connecting pipe is provided with a CO ₂ connected to the connecting pipe A condensate collection pipeline, the CO ₂ condensate collection pipeline is connected with the carbon dioxide collection box.
5. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 4, wherein the hot end of the cold and hot separator includes a hot pipe connected to the small end of the second trumpet tube, and the hot end The exchanger is sleeved on the outside of the heat pipe, and the side wall of the end of the heat pipe connected to the second trumpet pipe is provided with a plurality of air holes, and the air intake direction of the air holes is along the tangent of the heat pipe. The vent hole is set in a tapered hole gradually decreasing from the outside to the inside of the heat pipe, so that the dried air flows into the heat pipe through the vent hole.
6. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 5, wherein a gas temporary storage room is set outside the second trumpet tube, and the vent hole and the cold exchanger are located at The gas temporary storage chamber is such that the dried airflow entering the gas temporary storage chamber is preliminarily cooled and then enters the heat pipe through the vent hole.
7. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 3, wherein the dust collector is provided with a mist nozzle, and the water supply pipe of the mist nozzle is connected to the cold exchanger, The cooled running water in the cold exchanger is sprayed into the deduster through the mist nozzle.
8. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 3, characterized in that, a multi-layer desiccant interlayer is arranged in the gas collection chamber from top to bottom, so that the airflow after the dust removal Enter from the bottom of the gas collection chamber and pass through multiple layers of the desiccant interlayer in sequence for drying, and then pass into the carbon dioxide condensation mechanism from the top of the gas collection chamber;

   The middle part of the air collection chamber is provided with a cold air pipe, and the cold air pipe passes through the middle part of the multi-layer desiccant compartment from top to bottom in sequence, and the cold air pipe is located in the upper space of the topmost desiccant compartment set in a helical shape.
9. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 3, characterized in that, the air outlet of the adjustable variable speed air duct, the air outlet of the dust collector and the air outlet of the gas collection chamber Flameproof waterproof diversion fans are arranged everywhere, and the flameproof waterproof diversion fan is connected to a thermoelectric generator, so as to use the thermoelectric generator to supply power for the flameproof waterproof diversion fan;

   The thermoelectric generator is respectively connected with the carbon dioxide collection box and the hot end, so as to generate electricity by using the temperature difference between the cold air flow in the carbon dioxide collection box and the hot air flow discharged from the hot end.
10. The non-power consumption carbon dioxide multi-channel recovery device in the coal mine air shaft according to claim 9, wherein the thermoelectric generator comprises:

    A cold air chamber, the cold air chamber includes a cold air inner pipe and a cold air outer chamber covering the outside of the cold air inner pipe, and the end of the cold air inner pipe away from the cold air inlet is provided with a first channel that communicates with the cold air outer chamber hole, the end of the cold air outer cavity away from the first through hole is provided with a second through hole, and the cold air inlet is connected with the carbon dioxide collection box to pass through the cold air inlet into the The cold air flow in the cold air inner pipeline enters the cold air outer cavity through the first through hole and flows out through the second through hole;

    A hot air chamber, the hot air chamber includes a hot air inner chamber wrapped outside the cold air outer chamber, a hot air inlet is provided at the end of the hot air inner chamber far away from the cold air inlet, and the outside of the hot air inner chamber Covered with a hot gas outer cavity, the end of the hot gas inner cavity away from the hot gas inlet is connected to the hot gas outer cavity, and the end of the hot gas outer cavity close to the hot gas inlet is provided with a third through hole, so The hot air inlet is connected to the hot end, so that the hot air at the hot end passes through the hot air inlet at one end of the hot air cavity into the hot gas inner cavity, and then flows from the other end of the hot gas inner cavity. After entering the outer cavity of the hot gas, it flows out through the third through hole.

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