A renewable natural gas dehydration device

Abstract

The utility model discloses a renewable natural gas dehydration device, which belongs to the technical field of natural gas dehydration, and aims to solve the technical problems of difficult operation and inconvenient inspection and maintenance in the prior art. It has a raw gas dehydration module, a molecular sieve regeneration module and a regeneration gas circulation module; the raw gas dehydration module includes a raw gas coalescing separator, a molecular sieve dehydration tower and a dust filter; the input end of the raw gas coalescing separator is connected to the raw gas inlet, and the output end of the raw gas coalescing separator is connected to the input end of the molecular sieve dehydration tower; the output end of the molecular sieve dehydration tower is connected to the input end of the dust filter, and the output end of the dust filter is connected to the product gas outlet. The renewable natural gas dehydration device of the utility model can be better used for natural gas dehydration work, occupies a small area and has high processing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas dehydration, in particular to a renewable natural gas dehydration device. Background Art

[0002] Natural gas extracted from underground reservoirs generally contains water. In the process of natural gas processing, in order to prevent the formation of hydrates in the low-temperature system and blockage of equipment and pipelines, the water in the natural gas needs to be removed to make its dew point below -100°C. The raw gas drying of the cryogenic separation device of the natural gas processing plant mainly adopts molecular sieve adsorption to achieve the purpose of deep dehydration.

[0003] There are various types of existing molecular sieve dehydration devices. When designing the skid, all equipment and pipelines need to be concentrated on one or more skids. In order to save costs, designers will try to reduce the skids and reduce the floor space, which often causes problems such as difficult operation and inconvenient inspection and maintenance. Utility Model Content

[0004] The utility model aims to provide a renewable natural gas dehydration device to solve the technical problems of difficult operation and inconvenient inspection and maintenance in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a renewable natural gas dehydration device, comprising:

[0007] A raw gas dehydration module, the raw gas dehydration module comprising a raw gas coalescing separator, a molecular sieve dehydration tower and a dust filter; the input end of the raw gas coalescing separator is connected to the raw gas inlet, the output end of the raw gas coalescing separator is connected to the input end of the molecular sieve dehydration tower; the output end of the molecular sieve dehydration tower is connected to the input end of the dust filter, and the output end of the dust filter is connected to the product gas outlet.

[0008] Optionally or preferably, the raw gas dehydration module further comprises a second molecular sieve dehydration tower and a second dust filter;

[0009] The molecular sieve dehydration tower 2 is connected in parallel with the molecular sieve dehydration tower 1;

[0010] The second dust filter is connected in parallel with the first dust filter.

[0011] Optionally or preferably, it also includes a molecular sieve regeneration module;

[0012] The molecular sieve regeneration module comprises a regeneration gas electric heater and a regeneration gas circulation pipeline 1; the input end of the regeneration gas circulation pipeline 1 is connected to a pipeline for connecting the output end of the raw gas coalescing separator and the input end of the molecular sieve dehydration tower 1, and the output end of the regeneration gas circulation pipeline 1 is connected to the input end of the regeneration gas electric heater;

[0013] The output ends of the regeneration gas electric heater are respectively connected to the bottom of the molecular sieve dehydration tower 1 and the bottom of the molecular sieve dehydration tower 2.

[0014] Optionally or preferably, it also includes a regeneration gas circulation module;

[0015] The regeneration gas circulation module includes a regeneration gas air cooler, a regeneration gas separator and a regeneration gas circulation pipeline 2;

[0016] The input end of the regeneration gas circulation pipeline 2 is respectively connected to the top of the molecular sieve dehydration tower 1 and the molecular sieve dehydration tower 2; the output end of the regeneration gas circulation pipeline 2 is connected to the input end of the regeneration gas air cooler;

[0017] The output end of the regeneration gas air cooler is connected to the input end of the regeneration gas separator; the output end of the regeneration gas separator is respectively connected to the input ends of the molecular sieve dehydration tower 1 and the molecular sieve dehydration tower 2.

[0018] Optionally or preferably, it also includes a production sewage pipeline;

[0019] The bottoms of the raw gas coalescing separator and the regeneration gas separator are respectively connected to the production sewage pipeline.

[0020] Optionally or preferably, the raw gas dehydration module also includes a basket filter, the input end of the basket filter is connected to the raw gas inlet, and the output end of the basket filter is respectively connected to the input ends of the molecular sieve dehydration tower one and the molecular sieve dehydration tower two.

[0021] Optionally or preferably, an air vent is also included.

[0022] Optionally or preferably, the natural gas dehydration device is overall skid-mounted.

[0023] Based on the above technical solution, the utility model can at least produce the following technical effects:

[0024] The utility model provides a renewable natural gas dehydration device, which integrates tank equipment, pipelines, instruments, electrical and lighting systems on a skid, has high integration, small skid size, beautiful appearance, small footprint and high processing efficiency; the tank equipment on the skid adopts vertical tanks, which reduces the installation size required for the tank equipment;

[0025] The tank equipment, electrical equipment and pipelines on the skid are installed on both sides and arranged along the flow process to facilitate maintenance and extraction of filter elements; an inspection and escape passage is left in the middle.

[0026] Two dehydration towers are installed at the rear of the skid, leaving enough space for material replacement and maintenance; the overall layout of the skid is reasonable, and each single device, instrument, and valve has sufficient space for operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the layout of the renewable natural gas dehydration device of the utility model;

[0028] Figure 2 It is a plan view (first floor) of the skid of the renewable natural gas dehydration device of the utility model;

[0029] Figure 3 It is a plan view (second floor) of the skid of the renewable natural gas dehydration device of the utility model;

[0030] Figure 4 It is an axonometric diagram of the skid body of the renewable natural gas dehydration device of the utility model.

[0031] In the figure: 1. Molecular sieve dehydration tower 1; 2. Molecular sieve dehydration tower 2; 3. Raw gas agglomeration separator; 4. Basket filter; 5. Dust filter 1; 6. Dust filter 2; 7. Regeneration gas electric heater; 8. Regeneration gas air cooler; 9. Regeneration gas separator; 10. Vent air duct; 11. Raw gas inlet; 12. Product gas outlet; 13. Production sewage pipeline; 14. Regeneration gas circulation pipeline 1; 15. Regeneration gas circulation pipeline 2. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work belong to the scope of protection of the utility model.

[0033] Example

[0034] See also Figures 1 to 4 A renewable natural gas dehydration device comprises a raw gas dehydration module, a molecular sieve regeneration module and a regeneration gas circulation module.

[0035] In this embodiment, the raw gas dehydration module includes a raw gas coalescing separator 3, a molecular sieve dehydration tower 1, a molecular sieve dehydration tower 2, a dust filter 5 and a dust filter 6; wherein the input end of the raw gas coalescing separator 3 is connected to a raw gas inlet 11, and the raw gas from the raw gas inlet 11 enters the molecular sieve dehydration tower 1 or the molecular sieve dehydration tower 2 2 after passing through the raw gas coalescing separator 3; the above-mentioned molecular sieve dehydration tower 1 and the molecular sieve dehydration tower 2 2 are arranged in parallel.

[0036] In order to improve the dehydration efficiency, in this embodiment, when the raw gas is passed into the molecular sieve dehydration tower 1 for dehydration, the molecular sieve dehydration tower 2 is regenerated by the molecular sieve regeneration module; similarly, when the raw gas is passed into the molecular sieve dehydration tower 2 for dehydration, the molecular sieve dehydration tower 1 is regenerated by the molecular sieve regeneration module. The dehydrated raw gas is passed into the dust filter 15 or the dust filter 26 for filtration, and the filtered raw gas is output from the product gas outlet 12. The above-mentioned dust filter 15 and dust filter 26 are arranged in parallel and serve as backup for each other.

[0037] It can be understood that in order to achieve the above effects, the present embodiment further includes a plurality of electrically controlled valves and corresponding control modules; those skilled in the art can arrange them according to actual work needs.

[0038] In this embodiment, the molecular sieve regeneration module includes a regeneration gas electric heater 7 and a regeneration gas circulation pipeline 14; the regeneration gas is regenerated by taking wet gas from the pipeline before entering the dehydration tower, that is, the input end of the regeneration gas circulation pipeline 14 is connected to the pipeline used to connect the output end of the raw gas agglomeration separator 3 and the input end of the molecular sieve dehydration tower 1, and the output end of the regeneration gas circulation pipeline 14 is connected to the input end of the regeneration gas electric heater 7.

[0039] The regeneration gas enters the regeneration gas electric heater 7 for heating, and the heated regeneration gas is input from the bottom of the molecular sieve dehydration tower 1 or the molecular sieve dehydration tower 2 and output from the top to complete the regeneration of the molecular sieve.

[0040] In this embodiment, the regeneration gas circulation module includes a regeneration gas air cooler 8, a regeneration gas separator 9 and a regeneration gas circulation pipeline 2 15; the input end of the regeneration gas circulation pipeline 2 is respectively connected to the top of the molecular sieve dehydration tower 1 and the molecular sieve dehydration tower 2; the output end of the regeneration gas circulation pipeline 2 is connected to the input end of the regeneration gas air cooler; the output end of the regeneration gas air cooler is connected to the input end of the regeneration gas separator; the output end of the regeneration gas separator is respectively connected to the input end of the molecular sieve dehydration tower 1 and the molecular sieve dehydration tower 2.

[0041] The regenerated gas coming out from the top of the dehydration tower first enters the regenerated gas air cooler 8 for air cooling, and then enters the regenerated gas separator 9 for separation. The separated regenerated gas returns to the dehydration pipeline in front of the dehydration tower and merges with the raw gas to enter the dehydration process.

[0042] In this embodiment, the natural gas dehydration device further includes a production sewage pipeline 13 and an air venting pipeline 10; the bottoms of the raw gas coalescing separator 3 and the regeneration gas separator 9 are respectively connected to the production sewage pipeline 13.

[0043] The renewable natural gas dehydration device provided in this embodiment can at least achieve the following effects:

[0044] (1) The tank equipment on the skid adopts vertical tanks, which reduces the installation size of the tank equipment. All tank equipment, pipelines, instruments, electrical and lighting systems are integrated on one skid. It has achieved high integration, small skid size, beautiful appearance, small footprint and high processing efficiency.

[0045] (2) The tank equipment, electrical equipment, and pipelines on the skid are installed on both sides and arranged along the process flow, which is convenient for maintenance and extraction of filter elements. An inspection and escape passage is left in the middle. Two dehydration towers are installed at the rear of the skid, leaving enough space for material replacement and maintenance. The overall layout of the skid is reasonable, and there is sufficient space for operation, maintenance, and inspection of each single device, instrument, and valve;

[0046] (3) The pipelines are installed in order under the second-layer skid, and all the pipe openings that need to be connected to the outside are facing the same side to facilitate connection with the outside of the skid;

[0047] (4) An inclined ladder is provided on one side of the sled and a straight ladder is provided on the other side to facilitate inspection personnel to go up and down.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A renewable natural gas dehydration device, characterized in that: include: A raw gas dehydration module, the raw gas dehydration module comprising a raw gas coalescing separator (3), a molecular sieve dehydration tower (1) and a dust filter (5); the input end of the raw gas coalescing separator (3) is connected to a raw gas inlet (11), the output end of the raw gas coalescing separator (3) is connected to the input end of the molecular sieve dehydration tower (1); the output end of the molecular sieve dehydration tower (1) is connected to the input end of the dust filter (5), and the output end of the dust filter (5) is connected to a product gas outlet (12).

2. The renewable natural gas dehydration device according to claim 1, characterized in that: The raw gas dehydration module further comprises a molecular sieve dehydration tower 2 (2) and a dust filter 2 (6); The molecular sieve dehydration tower 2 (2) is connected in parallel with the molecular sieve dehydration tower 1 (1); The dust filter 2 (6) is connected in parallel with the dust filter 1 (5).

3. The renewable natural gas dehydration device according to claim 2, characterized in that: Also included is a molecular sieve regeneration module; The molecular sieve regeneration module comprises a regeneration gas electric heater (7) and a regeneration gas circulation pipeline (14); the input end of the regeneration gas circulation pipeline (14) is connected to a pipeline for connecting the output end of the raw gas coalescing separator (3) and the input end of the molecular sieve dehydration tower (1), and the output end of the regeneration gas circulation pipeline (14) is connected to the input end of the regeneration gas electric heater (7); The output ends of the regeneration gas electric heater (7) are respectively connected to the bottom of the molecular sieve dehydration tower 1 (1) and the bottom of the molecular sieve dehydration tower 2 (2).

4. The renewable natural gas dehydration device according to claim 2, characterized in that: Also included is a regeneration gas circulation module; The regeneration gas circulation module comprises a regeneration gas air cooler (8), a regeneration gas separator (9) and a regeneration gas circulation pipeline 2 (15); The input end of the regeneration gas circulation pipeline 2 (15) is respectively connected to the top of the molecular sieve dehydration tower 1 (1) and the top of the molecular sieve dehydration tower 2 (2); the output end of the regeneration gas circulation pipeline 2 (15) is connected to the input end of the regeneration gas air cooler (8); The output end of the regeneration gas air cooler (8) is connected to the input end of the regeneration gas separator (9); the output end of the regeneration gas separator (9) is respectively connected to the input ends of the molecular sieve dehydration tower 1 (1) and the molecular sieve dehydration tower 2 (2).

5. The renewable natural gas dehydration device according to claim 4, characterized in that: Also included is a production sewage pipeline (13); The bottoms of the raw gas coalescing separator (3) and the regeneration gas separator (9) are respectively connected to the production sewage pipeline (13).

6. The renewable natural gas dehydration device according to claim 1, characterized in that: The raw gas dehydration module also includes a basket filter (4), the input end of the basket filter (4) is connected to the raw gas inlet (11), and the output end of the basket filter (4) is respectively connected to the input ends of the molecular sieve dehydration tower 1 (1) and the molecular sieve dehydration tower 2 (2).

7. The renewable natural gas dehydration device according to claim 1, characterized in that: It also includes an air venting duct (10).

8. The renewable natural gas dehydration device according to claim 1, characterized in that: The natural gas dehydration device is overall skid-mounted.

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