Device for separating and purifying CH4 in coal bed gas by hydrate method
By designing a hydrate separation and purification device including bottom plate, mounting assembly, reaction assembly, stirring assembly, conveying assembly and separation assembly, the problems of slow reaction speed of existing devices and hydrate decomposition are solved, and more efficient CH4 purification and waste reduction effects are achieved.
Patent Information
- Application Number
- CN202421793648.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-27
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-27
AI Technical Summary
The existing CH4 hydrate purification device has a slow reaction speed, which affects efficiency, and the reacted hydrate is prone to decomposition after separation from ice water, causing waste.
A device for separating and purifying CH4 in coalbed methane by hydrate is designed, including a base plate, mounting assembly, reaction assembly, stirring assembly, conveying assembly and separation assembly. By setting a constant temperature separation structure and stirring structure, the CH4 hydrate is prevented from decomposing, and filtering and separation and cooling are performed through the filter plate and the refrigerator to improve the reaction efficiency and product stability.
By improving the reaction efficiency and preventing the decomposition of CH4 hydrate, the problems of slow reaction speed and waste are solved, and more efficient CH4 purification and waste reduction are achieved.
Smart Images
Figure CN222990086U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of natural gas industry, in particular to a device for separating and purifying CH4 in coalbed methane by the hydrate method. Background Technique
[0002] Coalbed methane refers to hydrocarbon gas stored in coal seams, mainly composed of CH4, mainly adsorbed on the surface of coal matrix particles, partially free in coal pores or dissolved in coal seam water; it is an associated mineral resource of coal and belongs to the category of unconventional natural gas; gas hydrate is a solid mixture formed by water molecules connecting with each other through hydrogen bonds to form a cage-like structure under high-pressure and low-temperature conditions; the hydrate method can be used to extract CH4 in coalbed methane to form CH4 hydrate, which is convenient for subsequent purification work; the current CH4 hydrate purification device has a slow reaction rate, which affects the efficiency on the one hand, and on the other hand, the hydrate produced is prone to decomposition after being separated from ice water, resulting in waste. Content of the Utility Model
[0003] In order to overcome the problems that the current CH4 hydrate purification device has a slow reaction rate, which affects the efficiency on the one hand, and on the other hand, the hydrate produced is prone to decomposition after being separated from ice water, resulting in waste.
[0004] The technical solution of the utility model is: a device for separating and purifying CH4 in coalbed methane by the hydrate method, including a bottom plate, a mounting assembly, a reaction assembly, a stirring assembly, a conveying assembly and a separation assembly. The mounting assembly is arranged above the bottom plate, the reaction assembly is arranged inside the mounting assembly, the stirring assembly is arranged inside the reaction assembly, the conveying assembly is arranged above the reaction assembly, the separation assembly is arranged above the bottom plate, and the separation assembly is located below the reaction assembly.
[0005] Preferably, the mounting assembly is used to install the reaction assembly, the stirring assembly and the conveying assembly. The reaction assembly provides a suitable reaction site for the hydration reaction. The stirring assembly can stir the reactants in the reaction assembly to make them fully mixed and improve the reaction efficiency. The conveying assembly conveys coalbed methane into the reaction assembly. The separation assembly filters and separates the mixed liquid after the hydration reaction to extract CH4 hydrate.
[0006] As a preference, the mounting assembly includes vertical plates, support brackets and fixing plates. The vertical plates are fixedly installed above the bottom plate, the support brackets are fixedly installed above the vertical plates, there are two groups of support brackets, and the fixing plates are fixedly installed on one side of the vertical plates; the vertical plates are used to support and install the fixing plates and the support brackets, the support brackets are used to install the conveying assembly and the stirring assembly, and the fixing plates are used to install the reaction assembly.
[0007] Preferably, the reaction assembly includes a reaction tank, connecting pipes, a pressure relief valve and a pressure gauge. The reaction tank is fixedly installed inside the fixed plate. There are three sets of reaction tanks. The connecting pipes are arranged between two sets of reaction tanks and are connected to the reaction tanks in a penetrating manner. There are two sets of connecting pipes. The pressure relief valve is arranged above the reaction tank in the middle, and the pressure gauge is arranged on one side of the pressure relief valve. By providing the reaction tank, a suitable reaction site is provided for the hydration reaction. By providing the connecting pipes to connect the three reaction tanks in a penetrating manner, the internal pressures of the three reaction tanks are kept consistent. By providing the pressure relief valve, pressure can be relieved when the pressure in the reaction tank is too high to ensure safety. By providing the pressure gauge, the pressure in the reaction tank can be read.
[0008] Preferably, the reaction assembly further includes a water inlet, a valve and a discharge pipe. The water inlet is arranged above the reaction tank. The valve is fixedly installed below the reaction tank. The discharge pipe is arranged below the reaction tank and is connected to the reaction tank in a penetrating manner. By providing the water inlet, an ice-water mixture can be added to the reaction tank. By providing the valve, the discharge of the reactants in the reaction tank can be controlled. By providing the discharge pipe to connect the reaction tank to the separation assembly, it is convenient to transport the reacted reactants.
[0009] Preferably, the stirring assembly includes a stirring rod, stirring blades, a rotating motor, a rotating shaft, gears and a chain. The stirring rod penetrates the reaction tank and is rotatably connected to the reaction tank. The stirring blades are fixedly installed on the periphery of the stirring rod. The stirring blades are located inside the reaction tank and there are multiple sets of stirring blades. The gears are fixedly installed above the stirring rod. The rotating motor is fixedly installed above a set of support brackets. The rotating shaft penetrates this set of support brackets. One end of the rotating shaft is fixedly connected to the output of the rotating motor, and the other end of the rotating shaft is fixedly connected to a set of gears. The chain is arranged on the periphery of the gears and meshes with the gears. By providing the rotating motor to drive the rotation of the rotating shaft, thereby driving the rotation of a set of gears, and driving the synchronous rotation of the other two sets of gears through the chain. By providing the rotation of the gears to drive the rotation of the stirring rod. By providing the stirring blades to stir the ice-water mixture inside the reaction tank to make it fully mixed with the coalbed methane transported in.
[0010] Preferably, the conveying assembly includes an external connecting pipe, a purification tank, a pressurizer and a gas transmission pipe. The pressurizer is fixedly installed above another set of support brackets. The purification tank is arranged on one side of the pressurizer and is connected to the pressurizer in a penetrating manner. The external connecting pipe is arranged on one side of the purification tank and is connected to the purification tank in a penetrating manner. One end of the gas transmission pipe is connected to the pressurizer in a penetrating manner, and the other end of the gas transmission pipe is connected to the reaction tank in a penetrating manner. By providing the external connecting pipe, an external coalbed methane storage device can be connected. By providing the purification tank, some molecular sieve deacidifying agents can be placed to deacidify the transported coalbed methane, reducing the adverse effects on the hydration reaction. By providing the pressurizer to pressurize the transported coalbed methane and by providing the gas transmission pipe to transport it to the reaction tank to maintain the air pressure stability in the reaction tank.
[0011] Preferably, the separation assembly includes a separation box, a refrigerator, a filter plate, a guide plate and a drain outlet, the separation box is fixedly installed above the bottom plate, the separation box is located below the discharge pipe, the separation box and the discharge pipe are through-connected, the refrigerator is fixedly installed on one side of the separation box, the filter plate is fixedly installed inside the separation box, the filter plate is tilted, the guide plate is fixedly installed inside the separation box, the guide plate is located below the filter plate, the guide plate is tilted to the other side, and the drain outlet is arranged on one side of the separation box; the mixture of hydrate and ice water after the reaction is completed is contained by arranging the separation box, and the filter plate and the guide plate are installed, the interior of the separation box is cooled by arranging the refrigerator, the mixture of hydrate and ice water is filtered and separated by arranging the filter plate, so that the solid CH4 hydrate is retained above the filter plate, the liquid screened by the filter plate is diverted and discharged by arranging the guide plate, and the waste liquid is discharged from the separation box by arranging the drain outlet, which is convenient for recovery or treatment.
[0012] Beneficial effects of the utility model:
[0013] 1. Compared with the current CH4 hydrate purification device, the reaction speed is slow, which affects the efficiency on the one hand, and the hydrate produced by the reaction is easy to decompose after separation from ice water, resulting in waste; this device separates the reaction-completed mixture by setting a constant temperature separation structure to prevent the separated CH4 hydrate from decomposing, and stirs the reactants through a stirring structure to fully mix and improve the reaction efficiency;
[0014] 2. Filter and separate the mixture of hydrate and ice water through the filter plate, so that the solid CH4 hydrate is retained above the filter plate for easy collection. The inside of the separation box is cooled by the refrigerator to maintain the state of CH4 hydrate and prevent its decomposition and waste;
[0015] 3. The rotating motor drives the shaft to rotate, thereby driving a set of gears to rotate, and the chain drives the other two sets of gears to rotate synchronously, thereby driving the stirring rod to rotate, and the stirring blades are used to stir the ice-water mixture in the reaction tank, so that the coalbed methane and ice water are fully mixed, hydration reaction is carried out, and the reaction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The first three-dimensional structure schematic diagram of the device for separating and purifying CH4 in coalbed methane by the hydrate method of the utility model is shown;
[0017] Figure 2 The second three-dimensional structure schematic diagram of the device for separating and purifying CH4 in coalbed methane by the hydrate method of the utility model is shown;
[0018] Figure 3The figure shows a schematic diagram of the sectional three-dimensional structure of the reaction component of the device for separating and purifying CH4 from coalbed methane by the hydrate method of the present utility model;
[0019] Figure 4 The figure shows a schematic diagram of the third three-dimensional structure of the device for separating and purifying CH4 from coalbed methane by the hydrate method of the present utility model;
[0020] Figure 5 The figure shows a schematic diagram of the sectional three-dimensional structure of the separation component of the device for separating and purifying CH4 from coalbed methane by the hydrate method of the present utility model;
[0021] Explanation of reference numerals: 1, bottom plate; 2, installation component; 3, reaction component; 4, stirring component; 5, conveying component; 6, separation component; 201, vertical plate; 202, support bracket; 203, fixing plate; 301, reaction tank; 302, connecting pipe; 303, air release valve; 304, pressure gauge; 305, water inlet; 306, valve; 307, discharge pipe; 401, stirring rod; 402, stirring blade; 403, rotating motor; 404, rotating shaft; 405, gear; 406, chain; 501, external connecting pipe; 502, purification tank; 503, pressurizer; 504, gas transmission pipe; 601, separation tank; 602, cooler; 603, filter plate; 604, guide plate; 605, drain port. Detailed implementation manners
[0022] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0023] Please refer to Figure 1 , the present utility model provides an embodiment: a device for separating and purifying CH4 from coalbed methane by the hydrate method, including a bottom plate 1, an installation component 2, a reaction component 3, a stirring component 4, a conveying component 5 and a separation component 6. The installation component 2 is arranged above the bottom plate 1, the reaction component 3 is arranged inside the installation component 2, the stirring component is arranged inside the reaction component 3, the conveying component 5 is arranged above the reaction component 3, the separation component 6 is arranged above the bottom plate 1, and the separation component 6 is located below the reaction component 3.
[0024] Please refer to Figures 2 - 3, in this embodiment, the installation component 2 includes a vertical plate 201, a support bracket 202 and a fixing plate 203. The vertical plate 201 is fixedly installed above the bottom plate 1, the support bracket 202 is fixedly installed above the vertical plate 201, there are two groups of support brackets 202, and the fixing plate 203 is fixedly installed on one side of the vertical plate 201; the vertical plate 201 is provided to support and install the fixing plate 203 and the support bracket 202, the support bracket 202 is provided to install the conveying component 5 and the stirring component 4, and the fixing plate 203 is provided to install the reaction component 3; the reaction component 3 includes a reaction tank 301, a connecting pipe 302, a pressure relief valve 303 and a pressure gauge 304. The reaction tank 301 is fixedly installed inside the fixing plate 203, there are three groups of reaction tanks 301, the connecting pipe 302 is arranged between two groups of reaction tanks 301, the connecting pipe 302 is connected to the reaction tank 301 in a penetrating manner, there are two groups of connecting pipes 302, the pressure relief valve 303 is arranged above the middle reaction tank 301, and the pressure gauge 304 is arranged on one side of the pressure relief valve 303; the reaction tank 301 is provided to provide a suitable reaction site for the hydration reaction, the connecting pipe 302 is provided to connect the three groups of reaction tanks 301 in a penetrating manner so that the internal pressures of the three groups of reaction tanks 301 are kept consistent, the pressure relief valve 303 is provided to relieve pressure when the pressure in the reaction tank 301 is too high to ensure safety, and the pressure gauge 304 is provided to read the pressure in the reaction tank 301; the reaction component 3 further includes a water inlet 305, a valve 306 and a discharge pipe 307. The water inlet 305 is arranged above the reaction tank 301, the valve 306 is fixedly installed below the reaction tank 301, the discharge pipe 307 is arranged below the reaction tank 301, and the discharge pipe 307 is connected to the reaction tank 301 in a penetrating manner; the water inlet 305 is provided to add an ice-water mixture into the reaction tank 301, the valve 306 is provided to control the discharge of the reactants in the reaction tank 301, and the discharge pipe 307 is provided to connect the reaction tank 301 to the separation component 6 to facilitate the conveyance of the reacted reactants; the stirring component 4 includes a stirring rod 401, stirring blades 402, a rotating motor 403, a rotating shaft 404, a gear 405 and a chain 406. The stirring rod 401 penetrates the reaction tank 301, the stirring rod 401 is rotatably connected to the reaction tank 301, the stirring blades 402 are fixedly installed on the periphery of the stirring rod 401, the stirring blades 402 are located inside the reaction tank 301, there are multiple groups of stirring blades 402, the gear 405 is fixedly installed above the stirring rod 401, the rotating motor 403 is fixedly installed above one group of support brackets 202, the rotating shaft 404 penetrates this group of support brackets 202, one end of the rotating shaft 404 is fixedly connected to the output of the rotating motor 403, the other end of the rotating shaft 404 is fixedly connected to one group of gears 405, and the chain 406 is arranged on the periphery of the gear 405, and the chain 406 meshes with the gear 405;By setting the rotation of the rotating motor 403 to drive the rotation of the rotating shaft 404, a set of gears 405 is driven to rotate, and the other two sets of gears 405 are driven to rotate synchronously through the chain 406. By setting the rotation of the gears 405, the stirring rod 401 is driven to rotate. By setting the stirring blades 402, the ice-water mixture inside the reaction tank 301 is stirred to make it fully mixed with the coalbed methane transported in.
[0025] Please refer to Figures 4 - 5 , in this embodiment, the conveying assembly 5 includes an outer connecting pipe 501, a purification box 502, a pressurizer 503 and a gas transmission pipe 504. The pressurizer 503 is fixedly installed above another set of support brackets 202. The purification box 502 is arranged on one side of the pressurizer 503. The purification box 502 is connected to the pressurizer 503 in a through manner. The outer connecting pipe 501 is arranged on one side of the purification box 502. The outer connecting pipe 501 is connected to the purification box 502 in a through manner. One end of the gas transmission pipe 504 is connected to the pressurizer 503 in a through manner, and the other end of the gas transmission pipe 504 is connected to the reaction tank 301 in a through manner; by setting the outer connecting pipe 501, an external coalbed methane storage device can be connected. By setting the purification box 502, some molecular sieve deacidifying agents can be contained to deacidify the transported coalbed methane, reducing the adverse impact on the hydration reaction. By setting the pressurizer 503 to pressurize the transported coalbed methane and by setting the gas transmission pipe 504 to transport it to the reaction tank 301, the air pressure in the reaction tank 301 is maintained stable; the separation assembly 6 includes a separation box 601, a cooler 602, a filter plate 603, a diversion plate 604 and a drain port 605. The separation box 601 is fixedly installed above the bottom plate 1. The separation box 601 is located below the discharge pipe 307. The separation box 601 is connected to the discharge pipe 307 in a through manner. The cooler 602 is fixedly installed on one side of the separation box 601. The filter plate 603 is fixedly installed inside the separation box 601. The filter plate 603 is inclined. The diversion plate 604 is fixedly installed inside the separation box 601. The diversion plate 604 is located below the filter plate 603. The diversion plate 604 is inclined to the other side. The drain port 605 is arranged on one side of the separation box 601; by setting the separation box 601 to hold the mixture of the completed hydrate and ice water, and by installing the filter plate 603 and the diversion plate 604, by setting the cooler 602 to cool the inside of the separation box 601, by setting the filter plate 603 to filter and separate the mixture of the hydrate and ice water, so that the solid CH4 hydrate stays above the filter plate 603. By setting the diversion plate 604 to divert and discharge the liquid screened out by the filter plate 603, and by setting the drain port 605 to discharge the waste liquid from the separation box 601, it is convenient for recovery or treatment.
[0026] When working, the ice-water mixture is added to the three reaction tanks 301 respectively through the water inlet 305 to provide a low-temperature environment for the reaction and provide water for the hydration reaction.
[0027] Connect an external coalbed methane storage device using the external connection pipe 501 to supply coalbed methane to the reaction tank 301. The transported coalbed methane first passes through the purification tank 502 for deacidification to reduce the impact on the hydration reaction. Use the pressurizer 503 to pressurize the inside of the reaction tank 301 to provide suitable pressure for the reaction;
[0028] Use the rotating motor 403 to drive the rotation of the rotating shaft 404, thereby driving the rotation of a set of gears 405. Use the chain 406 to drive the synchronous rotation of the other two sets of gears 405, thereby driving the rotation of the stirring rod 401. Use the stirring blades 402 to stir the ice-water mixture in the reaction tank 301 to make the coalbed methane and ice water fully mixed for the hydration reaction;
[0029] After the reaction is completed, open the valve 306 and use the feed pipe to transport the liquid mixture of hydrate and ice water into the separation tank 601. Use the filter plate 603 to filter the mixed liquid to separate the CH4 hydrate from the ice water, and it stays above the filter plate 603 for easy collection. Use the cooler 602 to maintain the low-temperature environment in the separation tank 601 to prevent the decomposition of the CH4 hydrate due to the increase in temperature after separation from the ice water, resulting in waste;
[0030] Use the deflector 604 to guide the separated ice water and discharge it through the drain port 605 for convenient recovery and treatment.
[0031] Through the above steps, use the installation component 2 to install the reaction component 3, the stirring component 4, and the conveying component 5. Use the reaction component 3 to provide a suitable reaction site for the hydration reaction. Use the stirring component 4 to stir the reactants in the reaction component 3 to make them fully mixed and improve the reaction efficiency. Use the conveying component 5 to transport coalbed methane into the reaction component 3. Use the separation component 6 to filter and separate the mixed liquid after the hydration reaction to extract the CH4 hydrate.
[0032] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the present invention.
Claims
1. A device for separating and purifying CH4 in coalbed methane by a hydrate method, comprising a bottom plate (1); characterized in that: The invention also comprises a mounting assembly (2), a reaction assembly (3), a stirring assembly (4), a conveying assembly (5) and a separation assembly (6); the mounting assembly (2) is arranged above the bottom plate (1); the reaction assembly (3) is arranged inside the mounting assembly (2); the stirring assembly is arranged inside the reaction assembly (3); the conveying assembly (5) is arranged above the reaction assembly (3); the separation assembly (6) is arranged above the bottom plate (1); and the separation assembly (6) is located below the reaction assembly (3).
2. The device for separating and purifying CH4 in coalbed methane by hydrate method according to claim 1, characterized in that: The mounting assembly (2) comprises a vertical plate (201), a supporting bracket (202) and a fixing plate (203); the vertical plate (201) is fixedly mounted above the bottom plate (1); the supporting bracket (202) is fixedly mounted above the vertical plate (201); two groups of supporting brackets (202) are provided; and the fixing plate (203) is fixedly mounted on one side of the vertical plate (201).
3. The device for separating and purifying CH4 in coalbed methane by hydrate method according to claim 2, characterized in that: The reaction assembly (3) comprises a reaction tank (301), a connecting pipe (302), an air relief valve (303) and a pressure gauge (304). The reaction tank (301) is fixedly installed inside the fixing plate (203). Three groups of reaction tanks (301) are provided. The connecting pipe (302) is provided between two groups of reaction tanks (301). The connecting pipe (302) is connected to the reaction tank (301) through the connecting pipe (302). Two groups of connecting pipes (302) are provided. The air relief valve (303) is provided above the reaction tank (301) located in the middle. The pressure gauge (304) is provided on one side of the air relief valve (303).
4. The device for separating and purifying CH4 in coalbed methane by hydrate method according to claim 3, characterized in that: The reaction assembly (3) further comprises a water inlet (305), a valve (306) and a discharge pipe (307); the water inlet (305) is arranged above the reaction tank (301); the valve (306) is fixedly installed below the reaction tank (301); the discharge pipe (307) is arranged below the reaction tank (301); and the discharge pipe (307) is connected to the reaction tank (301) through the reaction tank (301).
5. The device for separating and purifying CH4 in coalbed methane by hydrate method according to claim 3, characterized in that: The stirring assembly (4) comprises a stirring rod (401), a stirring blade (402), a rotating motor (403), a rotating shaft (404), a gear (405) and a chain (406). The stirring rod (401) passes through the reaction tank (301). The stirring rod (401) is rotatably connected to the reaction tank (301). The stirring blade (402) is fixedly mounted on the periphery of the stirring rod (401). The stirring blade (402) is located inside the reaction tank (301). The stirring blade (402) is provided with multiple groups. The gear (405) and the chain (406) are provided with multiple groups. (405) is fixedly installed above the stirring rod (401), the rotating motor (403) is fixedly installed above a group of supporting brackets (202), the rotating shaft (404) passes through the group of supporting brackets (202), one end of the rotating shaft (404) is fixedly connected to the output of the rotating motor (403), and the other end of the rotating shaft (404) is fixedly connected to a group of gears (405), and the chain (406) is arranged on the periphery of the gear (405), and the chain (406) is meshed with the gear (405).
6. The device for separating and purifying CH4 in coalbed methane by hydrate method according to claim 3, characterized in that: The conveying assembly (5) includes an external pipe (501), a purification box (502), a pressurizing machine (503) and an air pipe (504). The pressurizing machine (503) is fixedly installed above another group of support brackets (202). The purification box (502) is arranged on one side of the pressurizing machine (503). The purification box (502) and the pressurizing machine (503) are connected in a through-connection manner. The external pipe (501) is arranged on one side of the purification box (502). The external pipe (501) and the purification box (502) are connected in a through-connection manner. One end of the air pipe (504) is connected in a through-connection manner to the pressurizing machine (503), and the other end of the air pipe (504) is connected in a through-connection manner to the reaction tank (301).
7. The device for separating and purifying CH4 in coalbed methane by hydrate method according to claim 4, characterized in that: The separation assembly (6) comprises a separation box (601), a refrigerator (602), a filter plate (603), a guide plate (604) and a drain outlet (605). The separation box (601) is fixedly mounted above the bottom plate (1). The separation box (601) is located below the discharge pipe (307). The separation box (601) is connected to the discharge pipe (307). The refrigerator (602) is fixedly mounted on one side of the separation box (601). The filter plate (603) is fixedly mounted inside the separation box (601). The filter plate (603) is tilted. The guide plate (604) is fixedly mounted inside the separation box (601). The guide plate (604) is located below the filter plate (603). The guide plate (604) is tilted toward the other side. The drain outlet (605) is arranged on one side of the separation box (601).