Dehydration reactor for compressed natural gas

Abstract

The utility model discloses a compressed natural gas dehydration reactor which comprises a gas inlet pretreatment device, a compression tank, a water-gas separator and a drying box which are sequentially communicated through pipelines, a gas inlet valve is installed on the pipeline at the gas inlet end of the gas inlet pretreatment device, and a gas outlet valve is installed on the pipeline between the compression tank and the water-gas separator. An exhaust valve is mounted on the pipeline at the air outlet end of the drying box; and drain valves are mounted on a drain pipe I at the bottom end of the compression tank and a drain pipe II at the bottom of the water-air separator. Through the arrangement of the inlet gas pretreatment device, natural gas can be filtered and pre-pressurized, a drain valve and a gas outlet valve of the compression tank are prevented from being blocked, the natural gas in the compression tank can be better pressurized by the gas pressurization device, and the dehydration effect of water in the natural gas is better; according to the natural gas dehydration device, three-stage dehydration treatment can be performed on natural gas, the dehydration effect on the natural gas is guaranteed, and the quality of the natural gas is better.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas processing equipment, in particular to a compressed natural gas dehydration reactor. Background Art

[0002] The natural gas extracted from the wellhead and the purified natural gas after desulfurization generally contain a large amount of saturated water vapor. Water vapor is a harmful component in natural gas. If there is water vapor in natural gas, it will cause unnecessary power consumption and reduce the calorific value of natural gas. Moreover, the hydrates formed under certain conditions will have the hidden danger of clogging valves and pipelines. Therefore, it is necessary to use a reactor to dehydrate the natural gas.

[0003] However, when the existing reactor device is in use, it is not only unable to filter impurities in natural gas, but also easily causes blockage of the drain valve and the air outlet valve, affecting the quality of natural gas; moreover, the existing reactor does not completely dehydrate the natural gas, the dehydration effect is poor, and long-term use will pose a safety hazard. Utility Model Content

[0004] The utility model aims to provide a compressed natural gas dehydration reactor to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the utility model provides a compressed natural gas dehydration reactor, comprising:

[0006] A compression tank, wherein a gas pressurizing device is arranged inside the compression tank, a wall scraping assembly is suspended at the bottom end of the gas pressurizing device, and the wall scraping assembly is slidably matched with the inner wall of the compression tank;

[0007] An air intake pre-treatment device, the air intake pre-treatment device is fixedly connected to the air intake end at the bottom of the side wall of the compression tank, and the air intake pre-treatment device is used to filter and pre-compress the gas;

[0008] A water-gas separator, the water-gas separator is fixedly connected to the gas outlet end at the bottom of the side wall of the compression tank, and the water-gas separator is used to separate water and gas from the gas discharged from the compression tank;

[0009] A drying box, the drying box is fixedly connected to the gas outlet end of the water-gas separator, and an adsorption and dehydration structure is arranged in the drying box;

[0010] The air intake pretreatment device, the compression tank, the water-gas separator and the drying box are connected in sequence through pipelines. An air intake valve is installed on the pipeline at the air intake end of the air intake pretreatment device, an air outlet valve is installed on the pipeline between the compression tank and the water-gas separator, an exhaust valve is installed on the pipeline at the air outlet end of the drying box, and drain valves are installed on the drain pipe 1 at the bottom of the compression tank and the drain pipe 2 at the bottom of the water-gas separator.

[0011] Preferably, the gas pressurizing device includes a first telescopic cylinder fixedly installed at the top end of the compression tank. A first piston is fixedly connected to the bottom end of the first telescopic cylinder. The first piston is slidably engaged with the inner wall of the compression tank. The wall scraping assembly is suspended at the bottom end of the first piston.

[0012] Preferably, the wall scraping assembly includes a suspension rod fixedly connected to the bottom end of the first piston. A plurality of pulling ropes are fixedly connected to the bottom end of the suspension rod. The end of each pulling rope is fixedly connected to a scraping ring. The connection points of the pulling ropes and the scraping ring are arranged at equal intervals along the circumferential direction of the scraping ring. The outer wall of the scraping ring is slidably engaged with the inner wall of the compression tank.

[0013] Preferably, a plurality of pull rods are fixedly connected to the suspension rod. The end of each pull rod is fixedly connected to a connection block. The connection blocks are fixedly connected to the outer edge of the bottom end of the first piston, and the plurality of connection blocks are arranged at equal intervals along the circumferential direction of the first piston.

[0014] Preferably, the intake air pretreatment device includes a filter and a pre-pressurizing tank arranged in sequence along the pipeline. The filter is used to filter impurities in the gas. The pre-pressurizing tank is used to pressurize the gas entering the compression tank. The intake valve is arranged on the pipeline at the intake end of the filter.

[0015] Preferably, the filter includes a filter cylinder fixedly communicated with the pipeline. The filter cylinder is arranged in the vertical direction. A filter net is fixedly installed at the top of the inner wall of the filter cylinder.

[0016] Preferably, the pre-pressurizing tank includes a tank body. A second telescopic cylinder is fixedly connected to one end of the inner wall of the tank body close to the filter. The end of the second telescopic cylinder is fixedly connected to a second piston. The second piston is slidably engaged with the inner wall of the tank body. A plurality of through holes are formed in the second piston, and one-way valves are fixedly installed in the plurality of through holes.

[0017] Preferably, brackets are installed at the bottom of the compression tank, the bottom of the water-gas separator, and the bottom of the drying box.

[0018] Compared with the prior art, the present utility model has the following advantages and technical effects:

[0019] The compressed natural gas dehydration reactor provided by the utility model can filter natural gas through the setting of the air intake pretreatment device, avoiding blockage of the drain valve and the air outlet valve of the compression tank. Moreover, through the air intake pretreatment device, the natural gas in the compression tank can be pre-pressurized, which helps the gas pressurization device to better pressurize the natural gas in the compression tank, making the dehydration effect of the water in the natural gas better. Moreover, through the setting of the water-gas separator and the drying box, three-stage dehydration treatment of natural gas can be realized, ensuring the dehydration effect of natural gas and making the quality of natural gas better. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the compressed natural gas dehydration reactor of the present utility model;

[0022] Figure 2 It is a schematic diagram of the internal structure of the compression tank and the air intake pretreatment device of the present utility model;

[0023] In the figure: 1. Compression tank; 2. Water-gas separator; 3. Drying box; 4. Air intake valve; 5. Air outlet valve; 6. Exhaust valve; 7. Drain valve; 8. First telescopic cylinder; 9. First piston; 10. Suspension rod; 11. Pulling rope; 12. Scraper ring; 13. Pull rod; 14. Connecting block; 15. Filter cylinder; 16. Filter net; 17. Tank body; 18. Second telescopic cylinder; 19. Second piston; 20. Check valve; 21. Bracket. Detailed Embodiment

[0024] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model. The following will refer to the drawings and combine the embodiments to detail the present utility model.

[0025] As Figures 1 to 2 shown, the present utility model provides a compressed natural gas dehydration reactor, including:

[0026] A compression tank 1, in which a gas pressurization device is arranged, and a wall scraping assembly is suspended at the bottom end of the gas pressurization device, and the wall scraping assembly is slidably matched with the inner wall of the compression tank 1;

[0027] An intake air pretreatment device is fixedly and communicatively connected to the intake end at the bottom of the side wall of the compression tank 1. The intake air pretreatment device is used for filtering and pre-compressing the gas.

[0028] A water-gas separator 2 is fixedly and communicatively connected to the outlet end at the bottom of the side wall of the compression tank 1. The water-gas separator 2 is used for separating water and gas from the gas discharged from the compression tank 1. The water-gas separator 2 is an existing device, and its working principle and internal structure are known prior arts, which will not be elaborated here.

[0029] A drying oven 3 is fixedly and communicatively connected to the outlet end of the water-gas separator 2. An adsorption and dehydration structure is arranged in the drying oven 3. Among them, the adsorption and dehydration structure is composed of one or more combinations of an alumina adsorption plate, a sponge film layer, a fiber ultrafiltration layer, and an activated carbon layer.

[0030] The intake air pretreatment device, the compression tank 1, the water-gas separator 2, and the drying oven 3 are sequentially connected through pipelines. An intake valve 4 is installed on the pipeline at the intake end of the intake air pretreatment device. An outlet valve 5 is installed on the pipeline between the compression tank 1 and the water-gas separator 2. An exhaust valve 6 is installed on the pipeline at the outlet end of the drying oven 3. Drain valves 7 are installed on the drain pipe 1 at the bottom end of the compression tank 1 and the drain pipe 2 at the bottom of the water-gas separator 2.

[0031] In a further optimized solution, the gas pressurization device includes a telescopic cylinder 1 8 fixedly installed at the top end of the compression tank 1. The telescopic cylinder 1 8 can be one of an electric push rod or a hydraulic cylinder. The bottom end of the telescopic cylinder 1 8 is fixedly connected to a piston 1 9. The piston 1 9 is slidably matched with the inner wall of the compression tank 1. The scraping wall assembly is suspended at the bottom end of the piston 1 9.

[0032] In a further optimized solution, during the pressurization process of the compression tank 1, in order to timely clean the water droplets deposited on the inner wall of the compression tank 1, the scraping wall assembly includes a suspension rod 10 fixedly connected to the bottom end of the piston 1 9. A plurality of pull ropes 11 are fixedly connected to the bottom end of the suspension rod 10. The end of the pull rope 11 is fixedly connected to a scraping plate ring 12. The connection points of the pull rope 11 and the scraping plate ring 12 are arranged at equal intervals along the circumferential direction of the scraping plate ring 12. The outer wall of the scraping plate ring 12 is slidably matched with the inner wall of the compression tank 1.

[0033] In a further optimized solution, in order to prevent the piston 1 9 from deforming during the pressurization process of the compression tank 1, resulting in problems with the airtightness between the piston 1 9 and the compression tank 1, a plurality of pull rods 13 are fixedly connected to the suspension rod 10. The end of the pull rod 13 is fixedly connected to a connection block 14. The connection block 14 is fixedly connected to the outer edge at the bottom end of the piston 1 9, and a plurality of connection blocks 14 are arranged at equal intervals along the circumferential direction of the piston 1 9.

[0034] For a further optimized solution, the intake air pretreatment device includes a filter and a pre-pressurization tank arranged in sequence along the pipeline. The filter is used to filter impurities in the gas, and the pre-pressurization tank is used to pressurize the gas entering the compression tank 1. The intake valve 4 is arranged on the pipeline at the intake end of the filter.

[0035] For a further optimized solution, the filter includes a filter cylinder body 15 fixedly connected to the pipeline. The filter cylinder body 15 is arranged vertically, and a filter net 16 is fixedly installed at the top of the inner wall of the filter cylinder body 15.

[0036] For a further optimized solution, the pre-pressurization tank includes a tank body 17. One end of the inner wall of the tank body 17 close to the filter is fixedly connected with a second telescopic cylinder 18. The second telescopic cylinder 18 can be one of an electric push rod or a hydraulic cylinder. The end of the second telescopic cylinder 18 is fixedly connected with a second piston 19. The second piston 19 is slidably matched with the inner wall of the tank body 17; a number of through holes are formed in the second piston 19, and one-way valves 20 are fixedly installed in the number of through holes.

[0037] For a further optimized solution, brackets 21 are installed at the bottoms of the compression tank 1, the water-gas separator 2, and the drying box 3.

[0038] The working principle of the compressed natural gas dehydration reactor provided by the present utility model is as follows: Natural gas first enters the filter through the intake valve 4. The impurities mixed in the natural gas are intercepted in the filter under the action of the filter net 16. And since the filter is arranged vertically, to a certain extent, the probability of the filter net 16 being blocked can be reduced. The filtered natural gas enters the pre-pressurization tank. Through the reciprocating telescopic process of the second telescopic cylinder 18 in the pre-pressurization tank, the natural gas entering the pre-pressurization tank can enter the compression tank 1 through the one-way valve 20 on the second piston 19. And during the reciprocating process of the second piston 19, the natural gas in the compression tank 1 can be pressurized to a certain extent by using the second piston 19. When the natural gas in the compression tank 1 is pressurized to a certain extent by the second piston 19, the intake valve 4 is closed, and the first telescopic cylinder 8 is started to pressurize the natural gas in the compression tank 1 by using the first piston 9, so that the water vapor in the natural gas is more likely to precipitate. Moreover, when the first piston 9 moves downward, the scraping ring 12 suspended on the suspension rod 10 slides downward along the inner wall of the compression tank 1 under its own weight, so that the water droplets attached to the inner wall of the compression tank 1 slide down to the bottom of the compression tank 1 to gather, which is convenient for the water in the compression tank 1 to be discharged from the drain pipe 1 at the bottom; after the compression tank 1 is pressurized for a certain period of time, then the outlet valve 5 is opened, and the natural gas enters the water-gas separator 2 for further water-gas separation. The separated water is discharged from the drain pipe 2 at the bottom. The natural gas after water-gas separation enters the drying box 3 for final drying treatment of the natural gas. By realizing three-stage dehydration of the natural gas, the dehydration effect is better, thus ensuring the quality of the natural gas.

[0039] The above are only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application.

Claims

1. A compressed natural gas dehydration reactor, characterized in that: include: A compression tank (1), wherein a gas pressurizing device is arranged inside the compression tank (1), a wall scraping assembly is suspended at the bottom end of the gas pressurizing device, and the wall scraping assembly is slidably matched with the inner wall of the compression tank (1); An air intake pre-treatment device, the air intake pre-treatment device is fixedly connected to the air intake end at the bottom of the side wall of the compression tank (1), and the air intake pre-treatment device is used to filter and pre-compress the gas; a water-gas separator (2), the water-gas separator (2) being fixedly connected to the gas outlet end at the bottom of the side wall of the compression tank (1), and the water-gas separator (2) being used to separate water and gas from the gas discharged from the compression tank (1); A drying box (3), the drying box (3) being fixedly connected to the gas outlet end of the water-gas separator (2), and an adsorption and dehydration structure being arranged inside the drying box (3); The air intake pretreatment device, the compression tank (1), the water-gas separator (2) and the drying box (3) are connected in sequence through a pipeline; an air intake valve (4) is installed on the pipeline at the air intake end of the air intake pretreatment device; an air outlet valve (5) is installed on the pipeline between the compression tank (1) and the water-gas separator (2); an exhaust valve (6) is installed on the pipeline at the air outlet end of the drying box (3); and a drainage pipe 1 at the bottom end of the compression tank (1) and a drainage pipe 2 at the bottom end of the water-gas separator (2) are both installed with drainage valves (7).

2. The compressed natural gas dehydration reactor according to claim 1, characterized in that: The gas pressurizing device comprises a telescopic cylinder (8) fixedly mounted on the top of the compression tank (1); the bottom end of the telescopic cylinder (8) is fixedly connected to a piston (9); the piston (9) is slidably engaged with the inner wall of the compression tank (1); and the wall scraping assembly is suspended at the bottom end of the piston (9).

3. The compressed natural gas dehydration reactor according to claim 2, characterized in that: The scraper assembly includes a hanging rod (10) fixedly connected to the bottom end of the piston (9), the bottom end of the hanging rod (10) is fixedly connected to a plurality of pull ropes (11), the ends of the pull ropes (11) are fixedly connected to a scraper ring (12), the connection points between the pull ropes (11) and the scraper ring (12) are arranged at equal intervals along the circumference of the scraper ring (12), and the outer wall of the scraper ring (12) is slidably matched with the inner wall of the compression tank (1).

4. The compressed natural gas dehydration reactor according to claim 3, characterized in that: A plurality of pull rods (13) are fixedly connected to the suspension rod (10), and a connecting block (14) is fixedly connected to the end of the pull rod (13). The connecting block (14) is fixedly connected to the outer edge of the bottom end of the piston (9), and a plurality of the connecting blocks (14) are arranged at equal intervals along the circumference of the piston (9).

5. The compressed natural gas dehydration reactor according to claim 1, characterized in that: The air intake pretreatment device comprises a filter and a pre-pressurization tank which are arranged in sequence along the pipeline, the filter is used to filter impurities in the gas, the pre-pressurization tank is used to pressurize the gas entering the compression tank (1), and the air intake valve (4) is arranged on the pipeline at the air intake end of the filter.

6. The compressed natural gas dehydration reactor according to claim 5, characterized in that: The filter comprises a filter cylinder (15) fixedly connected to the pipeline, the filter cylinder (15) being arranged in a vertical direction, and a filter screen (16) being fixedly mounted on the top of the inner wall of the filter cylinder (15).

7. The compressed natural gas dehydration reactor according to claim 5, characterized in that: The pre-pressurization tank comprises a tank body (17), an inner wall of the tank body (17) close to the filter is fixedly connected to a second telescopic cylinder (18), the end of the second telescopic cylinder (18) is fixedly connected to a second piston (19), and the second piston (19) is slidably matched with the inner wall of the tank body (17); a plurality of through holes are formed on the second piston (19), and a check valve (20) is fixedly installed in each of the plurality of through holes.

8. The compressed natural gas dehydration reactor according to claim 1, characterized in that: The bottom of the compression tank (1), the bottom of the water-gas separator (2) and the bottom of the drying box (3) are all installed with brackets (21).

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