Carbon dioxide sealing and storing device for coal mine goaf

Abstract

The invention discloses a coal mine goaf carbon dioxide sequestration device, and belongs to the technical field of carbon dioxide sequestration. The device comprises a collecting assembly and a compressing assembly, the collecting assembly and the compressing assembly are communicated through a first conveying pipeline, a collecting pipeline set comprises an input pipe and a plurality of collecting pipes connected with one another, and the collecting pipes are movably connected with the input pipe; the collecting assembly comprises a first shell, a filter screen is arranged in the first shell, a mounting shaft is rotatably connected to the lower portion of the filter screen, a plurality of blades are annularly arranged on the mounting shaft at equal intervals, and one end of the inner side of the input pipe extends to the position, close to the middle of one blade, in the first shell. And one end of the inner side of the input pipe extends to the position, close to the middle of one blade, in the first shell, so that carbon dioxide gas pushes the blades to rotate, the multiple blades rotate, and particulate matter in carbon dioxide is thrown away to the inner wall of the first shell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon dioxide storage, more particularly, to a carbon dioxide storage device for coal mine goaf. BACKGROUND

[0002] The coal mining industry is one of the important sources of carbon dioxide emissions. During the process of coal mining, a large amount of carbon dioxide will be released into the atmosphere along with the mining of coal. On the one hand, coal itself adsorbs a certain amount of carbon dioxide during the formation process, and these carbon dioxide will be released during mining; on the other hand, ventilation is required during the process of coal mining to expel harmful gases in the mine, which includes a large amount of carbon dioxide. At the same time, if the goaf left after coal mining is not reasonably utilized, it will not only cause waste of resources, but also may cause geological disasters such as surface subsidence.

[0003] At present, although there are some carbon dioxide storage technologies, there are still many problems in the application of coal mining. Traditional geological storage technologies, such as injecting carbon dioxide into deep saline aquifers, face challenges of complex geological conditions during the implementation of coal mining. The geological structure of coal mine goaf is often destroyed due to long-term mining activities, and the stability and sealing property of the stratum are difficult to guarantee, which makes the carbon dioxide have a leakage risk after injection. Once leakage occurs, not only will the carbon dioxide storage fail, but also it may cause serious pollution to the surrounding environment and ecological system.

[0004] In addition, the existing carbon dioxide collection and transportation technology has low application efficiency in coal mine goaf. The environment of coal mining site is complex, and the space is narrow, and the installation and operation of equipment are subject to many limitations. The existing collection equipment is difficult to adapt to the special working conditions of coal mine goaf, and cannot efficiently collect the dispersedly emitted carbon dioxide. At the same time, in the process of transporting the collected carbon dioxide to the storage site, due to the complex terrain of coal mine goaf, the laying of the transportation pipeline is difficult, the cost is high, and problems such as pipeline corrosion and leakage are prone to occur, which affects the overall effect and economy of carbon dioxide storage.

[0005] In view of this, we propose a carbon dioxide storage device for coal mine goaf. SUMMARY

[0006] The purpose of the present application is to provide a carbon dioxide storage device for coal mine goaf to solve the problems raised in the background art: To achieve the above purpose, the present application provides the following technical scheme: The application discloses a coal mine goaf carbon dioxide storage device which comprises a collecting assembly and a compression assembly, the collecting assembly and the compression assembly are communicated through a first conveying pipeline, the collecting assembly is provided with a collecting pipeline set, the collecting pipeline set comprises an input pipeline and a plurality of collecting pipelines which are connected with each other, the collecting pipelines are movably connected with the input pipeline, and a collecting cover is arranged on the collecting pipelines at the end. The collecting assembly comprises a first shell, a filter screen is arranged in the first shell, a mounting shaft is rotatably connected below the filter screen, a plurality of blades are arranged in an annular and equidistant manner on the mounting shaft, and one end of the inner side of the input pipeline extends to the middle of one of the blades in the first shell. An atomizing nozzle is arranged below the filter screen, a connecting water pipe is arranged outside the first shell and connected with the atomizing nozzle. Two groups of baffle plates are oppositely arranged above the filter screen, the end portions of the two groups of baffle plates are cross arranged, a dehumidifying cavity is arranged above the first shell, and a heating net is arranged in the dehumidifying cavity.

[0007] Preferably, the heating net is in a cylindrical net structure, and the dehumidifying cavity is communicated with the first shell.

[0008] Preferably, a plurality of grooves are formed in one side surface of each blade, and the end portion of the input pipeline extends to one side of the grooves.

[0009] Preferably, the compression assembly comprises a second shell, a mounting cavity and a cooling cavity are arranged in the second shell, a plurality of stage compressors are arranged in the mounting cavity, a condenser is arranged outside the second shell, a water inlet pipe and a water outlet pipe are arranged on the condenser, and the water inlet pipe and the water outlet pipe are connected to the two ends of the cooling cavity respectively.

[0010] Preferably, a guide vane is arranged on the inner wall of the outer side of the cooling cavity, the guide vane is in a spiral structure, and a gap exists between the end portion of the guide vane and the inner wall of the inner side of the cooling cavity.

[0011] Preferably, one end of the second shell is provided with an air inlet, the air inlet is connected with the first conveying pipeline, the other end of the second shell is provided with an air outlet, and the air outlet is connected with a second conveying pipeline.

[0012] Preferably, a flow regulating valve and a gas sensor are arranged on the input pipeline.

[0013] Preferably, the filter screen comprises a particulate matter filter screen, and an activated carbon adsorption net is arranged on the top surface of the particulate matter filter screen.

[0014] Preferably, a pressure sensor and a temperature sensor are arranged in the mounting cavity.

[0015] Compared with the prior art, the application has the following beneficial effects: (1) the present application through the input pipe and a plurality of interconnected collection pipe, a plurality of collection pipe can be simultaneously connected with the input pipe activity, and a plurality of collection pipe detachable connection, convenient according to the environment of coal mine goaf splicing, convenient for installation can overcome the complex geological conditions and special working conditions of coal mine goaf environment, realize the efficient collection, safe transportation and reliable storage of carbon dioxide.

[0016] (2) the present application input pipe inside one end extends to the first housing in the middle of one of the blades, when the carbon dioxide gas sent into the first shell impact one of the blades, will push the blade around the shaft axis rotation, so that a plurality of blades rotate, facilitate in the centrifugal force makes the carbon dioxide particles in the first shell wall off, and then fall and collect processing. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure of the present application schematic diagram; Figure 2 is the collection assembly of the present application cross section schematic diagram; Figure 3 is the collection assembly of the present application side view schematic diagram; Figure 4 is the compression assembly of the present application cross section structure schematic diagram.

[0018] Figure label explanation: 1, collection assembly;101, first housing;102, filter screen;103, blade;104, baffle;105, dehumidification cavity;106, heating net;2, compression assembly;201, second housing;202, installation cavity;203, cooling cavity;204, condenser;205, guide vane;206, gas inlet;207, gas outlet;3, first conveying pipeline;4, collection pipeline group;401, collection pipe;402, collection cover;403, input pipe;5, atomizing nozzle;6, water pipe;7, second conveying pipeline;8, storage room. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0020] Embodiments: Please refer to Figures 1-4The utility model provides a kind of coal mine goaf carbon dioxide storage device, including collection component 1 and compression component 2, collection component 1 is used to collect the carbon dioxide of coal mine goaf, compression component 2 is used to store after carbon dioxide gas is compressed to high pressure state, collection component 1 and compression component 2 are communicated by first conveying pipeline 3, collection component 1 is connected with collection pipeline group 4, collection pipeline group 4 is connected with gas pump, for carbon dioxide in coal mine goaf is transported to collection component 1, collection pipeline group 4 includes input pipe 403 and multiple collection pipes 401 connected with each other, multiple collection pipes 401 can be simultaneously connected with input pipe 403, multiple collection pipes 401 are detachably connected, easy to splice according to the environment of coal mine goaf, installation is convenient, collection cover 402 is connected on the collection pipe 401 at end, to facilitate the collection of carbon dioxide, the setting of splicing type collection pipe 401 overcomes the complex geological conditions and special working condition environment of coal mine goaf, realizes the efficient collection, safe transportation and reliable storage of carbon dioxide.Collection pipe 401 can also be a bellows, for use at turns.

[0021] As Figure 2 、 3 Indicated, collection component 1 includes first housing 101, filter screen 102 is provided in first housing 101, filter screen 102 is used to remove particulate matter dust in carbon dioxide, installation shaft is rotatably connected below filter screen 102, multiple blades 103 are arranged in ring shape equidistantly on installation shaft, one end of input pipe 403 inside extends to the middle part of one of blade 103 in first housing 101, when carbon dioxide gas sent into first housing 101 impacts one of blade 103, will push blade 103 to rotate around the axis of installation shaft, so that multiple blades 103 rotate, facilitate under the action of centrifugal force to make particulate matter in carbon dioxide to first housing 101 inner wall, then fall down and collect and handle, wherein the end of input pipe 403 inside is aligned with the middle part of one of blade 103, to facilitate the carbon dioxide gas sent to impact blade 103, so that multiple blades 103 rotate, and when blade 103 rotates, it will not hit input pipe 403.

[0022] Filter screen 102 is provided with atomizing nozzle 5 below, atomizing nozzle 5 is annularly arranged on the inner wall of first housing 101, and a connecting water pipe 6 is arranged outside first housing 101 and connected with atomizing nozzle 5; the connecting water pipe 6 is connected with a water tank, and the water in the water tank is sprayed into the chamber below the first housing 101 through the atomizing nozzle 5, so that the water mist combines with the dust particles in the carbon dioxide, facilitating the dust particles to fall down, and the carbon dioxide gas is filtered through the filter screen 102 after the particulate matter and dust are filtered, and then compressed.

[0023] Two sets of baffles 104 are arranged opposite each other on the upper sides of the filter screen 102. The ends of the two sets of baffles 104 are arranged crosswise. The arrangement of the baffles 104 allows the carbon dioxide gas containing moisture to come into contact with the baffles 104, which can remove some of the moisture in the carbon dioxide. At the same time, the baffles block the fine dust and prevent it from continuing to flow. A dehumidification chamber 105 is arranged above the first housing 101. A heating mesh 106 is arranged in the dehumidification chamber 105. The moisture in the carbon dioxide is removed by the arrangement of the heating mesh 106.

[0024] In one possible embodiment, moisture can also be removed using a molecular sieve dryer to obtain pure carbon dioxide gas.

[0025] In this application, the heating mesh 106 has a cylindrical mesh structure, which increases the contact area between the heating mesh 106 and carbon dioxide, thereby improving the moisture removal efficiency. The dehumidification chamber 105 is connected to the first housing 101 and is located above the first housing 101.

[0026] In this application, each blade 103 has multiple grooves on one side surface, and the end of the input pipe 403 extends to one side of the groove. The grooves increase the contact area between the gas and the blade 103, making it easier for the input carbon dioxide gas to drive the blade 103 to rotate.

[0027] like Figure 4 As shown in this application, the compression assembly 2 includes a second housing 201, which contains an installation cavity 202 and a cooling cavity 203. The installation cavity 202 contains a multi-stage compressor for compressing carbon dioxide at a certain compression ratio. A condenser 204 is provided outside the second housing 201. The condenser 204 has an inlet pipe and an outlet pipe, which are respectively connected to the two ends of the cooling cavity 203. The condenser 204 is used to cool the coolant before sending it into the cooling cavity 203. The coolant is used to cool the installation cavity 202. The coolant flowing through the entire cooling cavity 203 finally enters the condenser 204 for condensation, forming a circulating cooling system.

[0028] The mounting cavity 202 is equipped with a pressure sensor and a temperature sensor. The purified carbon dioxide gas enters the compression assembly 2, which performs multi-stage compression according to a preset compression ratio and cooling program. The pressure sensor and temperature sensor monitor the pressure and temperature data in real time during the compression process. When the pressure or temperature exceeds the set threshold, the protection device is automatically activated to stop the compression or make corresponding adjustments.

[0029] In the present application, the cooling cavity 203 is provided with a guide vane 205 near the outer side inner wall, the guide vane 205 is a spiral structure, the flow path of the cooling liquid is guided through the setting of the guide vane 205, so that the residence time of the cooling liquid in the cooling cavity 203 is increased, there is a gap between the end of the guide vane 205 and the inner wall of the cooling cavity 203 near the inner side, the gap is set to facilitate the rapid filling of the cooling liquid in the cooling cavity 203, although the cooling liquid temperature rises faster on the side of the installation cavity 202, but its temperature can be quickly dispersed by the cooling liquid around the guide vane 205, thereby improving the cooling effect.

[0030] In the present application, one end of the second shell 201 is provided as an air inlet 206, the air inlet 206 is connected with the first conveying pipeline 3, the other end of the second shell 201 is provided as an air outlet 207, the air outlet 207 is connected with the second conveying pipeline 7, the second conveying pipeline 7 is used to send the treated carbon dioxide into the storage chamber 8 for storage.

[0031] In the present application, the input pipe 403 is provided with a flow regulating valve and a gas sensor, according to the carbon dioxide concentration and flow data monitored by the gas sensor, the opening of the flow regulating valve is adjusted to ensure that the carbon dioxide gas is collected at the best flow.

[0032] The high-pressure carbon dioxide gas in the storage chamber 8 is delivered to the injection well through the injection pipeline, the injection pump adjusts the injection flow and pressure according to the geological data and pressure data fed back by the monitoring system, and slowly injects the carbon dioxide into the coal mine goaf or deep stratum for final storage.

[0033] In the present application, the filter screen 102 includes a particulate filter screen, and an activated carbon adsorption screen is arranged on the top surface of the particulate filter screen. First, the particulate filter screen removes larger particulate dust and impurities, and then enters the activated carbon adsorption screen to adsorb and remove harmful gases such as sulfides therein.

[0034] In a possible embodiment, a monitoring system and a control collection system are further included, the pressure sensor, the concentration sensor and the leakage monitor of the monitoring system monitor the carbon dioxide pressure, concentration and leakage in the storage area in real time, and transmit the data to the central control system. The central control system analyzes and judges according to the monitoring data, issues an alarm in time when an abnormal condition is found, and adjusts the operating parameters of the control collection system, the purification system, the multi-stage compressor and the injection system to ensure the safety and stability of the carbon dioxide storage.

[0035] In use, according to the geological environment of the coal mine goaf, a plurality of collection pipes 401 are spliced together, wherein the collection pipes 401 can also adopt corrugated pipes, which are convenient to use at turns, after the splicing of the plurality of collection pipes 401 is completed, the collection cover 402 is installed at the ventilation opening of the coal mine goaf or a suitable position of the goaf, so that the collection cover 402 covers as large a gas discharge area as possible, and the collection cover 402 is in communication with the collection pipes 401. The flow regulating valve on the collection pipe 401 is opened, and according to the carbon dioxide concentration and flow data monitored by the gas sensor, the opening degree of the flow regulating valve is adjusted to ensure that the carbon dioxide gas is collected at the optimal flow. The collected carbon dioxide gas enters the first shell 101, and drives the plurality of blades 103 to rotate, and under the action of centrifugal force, the particulate matters in the carbon dioxide are thrown to the inner wall of the first shell 101, and then fall down and are collected and treated, at the same time, the atomizing nozzles spray water mist into the first shell 101, so that the dust and particulate matters are dampened, the gravity is increased, and the falling down is facilitated, while the carbon dioxide gas passes through the filter screen 102 to remove larger particulate dust and impurities, passes through the activated carbon adsorption screen to adsorb and remove harmful gases such as sulfides therein, and finally passes through the dehumidification cavity 105 to remove moisture to obtain pure carbon dioxide gas; the purified carbon dioxide gas enters the compression assembly 2, and the multi-stage compressor performs multi-stage compression according to a preset compression ratio and cooling program, and the pressure sensor and the temperature sensor monitor the pressure and temperature data in the compression process in real time, and when the pressure or temperature exceeds the set threshold value, the protection device is automatically started to stop compression or make corresponding adjustment. The compressed high-pressure carbon dioxide gas is sent into the storage chamber 8 through the second conveying pipeline 7 for temporary storage, and finally is conveyed to the injection well through the injection pipeline, and the injection pump adjusts the injection flow and pressure according to the geological data and pressure data fed back by the monitoring system to slowly inject the carbon dioxide into the coal mine goaf or deep stratum for storage.

[0036] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A carbon dioxide sequestration device for coal mine goaf areas, comprising a collection component (1) and a compression component (2), characterized in that: The collecting component (1) and the compression component (2) are connected through a first conveying pipe (3). The collecting component (1) is connected to a collecting pipe group (4). The collecting pipe group (4) includes an input pipe (403) and a plurality of interconnected collecting pipes (401). The collecting pipes (401) are movably connected to the input pipes (403). A collecting cover (402) is connected to the collecting pipe (401) at the end. The collecting component (1) includes a first housing (101), a filter screen (102) is provided inside the first housing (101), an installation shaft is rotatably connected below the filter screen (102), and a plurality of blades (103) are arranged in a ring at equal intervals on the installation shaft. One end of the inner side of the input pipe (403) extends to the middle of one of the blades (103) inside the first housing (101). Atomizing nozzle (5) is provided below the filter screen (102), and a connecting water pipe (6) is provided outside the first housing (101). The connecting water pipe (6) passes through the first housing (101) and connects to the atomizing nozzle (5). Two sets of baffles (104) are arranged opposite each other on the upper sides of the filter screen (102), and the ends of the two sets of baffles (104) are arranged crosswise. A dehumidification chamber (105) is arranged above the first housing (101), and a heating mesh (106) is arranged inside the dehumidification chamber (105).

2. A carbon dioxide sequestration device for coal mine goaf areas according to claim 1, characterized in that: The heating mesh (106) has a cylindrical mesh structure, and the dehumidification chamber (105) is connected to the first shell (101).

3. A carbon dioxide sequestration device for coal mine goaf areas according to claim 1, characterized in that: Each blade (103) has multiple grooves on one side surface, and the end of the input pipe (403) extends to one side of the groove.

4. A carbon dioxide sequestration device for coal mine goaf areas according to claim 1, characterized in that: The compression assembly (2) includes a second housing (201), which has an installation cavity (202) and a cooling cavity (203) inside. The installation cavity (202) is equipped with a multi-stage compressor. A condenser (204) is provided outside the second housing (201). The condenser (204) is equipped with an inlet pipe and an outlet pipe, which are respectively connected to both ends of the cooling cavity (203).

5. A carbon dioxide sequestration device for coal mine goaf areas according to claim 4, characterized in that: The cooling cavity (203) has a guide vane (205) on its inner wall near the outer side. The guide vane (205) has a spiral structure and there is a gap between the end of the guide vane (205) and the inner wall of the cooling cavity (203) near the inner side.

6. A carbon dioxide sequestration device for coal mine goaf areas according to claim 4, characterized in that: One end of the second housing (201) is configured as an air inlet (206), which is connected to the first conveying pipe (3). The other end of the second housing (201) is configured as an air outlet (207), which is connected to the second conveying pipe (7).

7. A carbon dioxide sequestration device for coal mine goaf areas according to claim 1, characterized in that: The input pipe (403) is equipped with a flow regulating valve and a gas sensor.

8. A carbon dioxide sequestration device for coal mine goaf areas according to claim 1, characterized in that: The filter screen (102) includes a particulate filter screen, and an activated carbon adsorption screen is provided on the top surface of the particulate filter screen.

9. A carbon dioxide sequestration device for coal mine goaf areas according to claim 4, characterized in that: The mounting cavity (202) is equipped with a pressure sensor and a temperature sensor.

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