CN203139872U - Acid gas exhaust preprocessing device of LNG (Liquefied Natural Gas) production equipment - Google Patents
Acid gas exhaust preprocessing device of LNG (Liquefied Natural Gas) production equipment Download PDFInfo
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- CN203139872U CN203139872U CN 201320066000 CN201320066000U CN203139872U CN 203139872 U CN203139872 U CN 203139872U CN 201320066000 CN201320066000 CN 201320066000 CN 201320066000 U CN201320066000 U CN 201320066000U CN 203139872 U CN203139872 U CN 203139872U
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- desulfurizing tower
- gas
- desulfurizing
- outlet
- acid gas
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Abstract
The utility model relates to an acid gas exhaust preprocessing device of LNG (Liquefied Natural Gas) production equipment. The acid gas exhaust preprocessing device comprises a stripping tower, wherein the lower end of the stripping tower is provided with a return tank; the side wall at the upper end of the return tank is provided with a gas exhaust outlet; the gas exhaust outlet is connected with a pressure regulating valve for regulating the pressure of the stripping tower through a pipeline; the downstream end of the pressure regulating valve is sequentially provided with a gas-liquid separation tank and a desulfurizing tower; an inlet of the gas-liquid separation tank is connected with the pressure regulating valve through a pipeline; an outlet at the top of the gas-liquid separation tank is connected with an inlet of the desulfurizing tower through a pipeline; and an outlet of the desulfurizing tower is connected with a high-altitude exhaust pipe. The acid gas exhaust preprocessing device can be used for exhausting H2S in gas exhausted at high altitude so that the content of the H2S in the gas exhausted at high altitude is reduced.
Description
Technical field
The utility model relates to the liquefied natural gas field, is specifically related to a kind of acid gas discharging pre-procesor of LNG production equipment.
Background technology
LNG is the abbreviation of English liquefied natural gas (liquefied natural gas).The original LNG production equipment of applicant company is the natural gas H that advances equipment according to input
2S content should be less than 1.3ppm design, H
2S concentration is minimum, does not need the gas of discharging is handled, and therefore adopts the direct stripper regenerating carbon dioxide design of high altitude discharge on the spot with decarbonization system.But because the H of China's pipeline gas standard
2S content is less than 15mg/m
3, through converting the H of China's pipeline gas standard
2S content is far longer than the 1.3ppm of original design less than 10.5ppm.And decarbonization device adopts active MDEA(methyl diethanolamine) method, the CO of decarbonization device in removing natural gas
2The time preferentially remove H in the natural gas
2S.Referring to Fig. 2, the regenerating carbon dioxide of the stripper 1 of decarbonization system through behind the pressure-regulating valve 4 again by high altitude discharge pipe 9 on the spot high altitude discharge the time, the hydrogen sulfide of the high concentration that removes also can constantly be discharged in the air, causes hydrogen sulfide emission amount severe overweight.Original LNG production equipment toxic emission is detected the H of gas discharge outlet 3 through applicant company
2S content is up to more than 1500ppm～2000ppm.H
2S is the sour gas that severe toxicity is arranged, and it is 500ppm to the LC of human body, can also dissolve in water.So H of the floss hole of stripper discharge
2S not only can the severe contamination water and air, and people's life also can cause employee H around the influence
2S poisons fatal, and security risk is very big.Therefore need transform equipment, to reduce the H of high altitude discharge gas
2S content.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, a kind of acid gas discharging pre-procesor of LNG production equipment is provided, this device removes the H in the high altitude discharge gas by between the gas discharge outlet of the return tank of stripper lower end upper end sidewall and high altitude discharge pipe desulfurizing tower being set
2S has reduced the H of high altitude discharge gas
2S content.
The purpose of this utility model is achieved in that a kind of acid gas discharging pre-procesor of LNG production equipment, comprise stripper, described stripper lower end is provided with return tank, the upper end sidewall of described return tank is provided with gas discharge outlet, described gas discharge outlet connects the pressure-regulating valve that is used for the control pressure of stripping tower by pipeline, the downstream of described pressure-regulating valve sets gradually knockout drum, desulfurizing tower, the import of described knockout drum connects pressure-regulating valve by pipeline, the outlet of described gas-liquid separation tank top is by the import of pipeline connection desulfurizing tower, and the outlet of described desulfurizing tower connects the high altitude discharge pipe.
Described desulfurizing tower is a plurality of, and described a plurality of desulfurizing towers are divided into 2～3 groups, is made up of 1 desulfurizing tower or 2 desulfurizing towers that are in series for every group, and every group of desulfurizing tower can switch by the reversal valve that arranges.
Filling is the desulfurizing agent of solid active iron oxide in the described desulfurizing tower.
The beneficial effects of the utility model are: owing between the gas discharge outlet of the return tank of stripper lower end upper end sidewall and high altitude discharge pipe desulfurizing tower is set, the interior desulfurizing agent of desulfurizing tower is with the H in the acid gas
2S is adsorbed onto in the aperture of desulfurizing agent, thereby removes the H in the acid gas
2S has reduced the H of high altitude discharge gas
2S content makes H in the high altitude discharge gas
2S content is down to below the 1ppm, has reached the discharge standard of stipulating in the national relevant regulations.Again because of H in the high altitude discharge gas
2The reduction of S content is improved operation field personnel and people's living environment on every side greatly, has reduced the risk of poisoning when the post personnel patrol and examine.And be provided with knockout drum between the gas discharge outlet of the sour water return tank of stripper lower end upper end sidewall and the desulfurizing tower, the drying that is used for acid gas is handled, and has guaranteed desulfurized effect.Also be provided with pressure-regulating valve between the gas discharge outlet of the return tank upper end sidewall of knockout drum and stripper lower end, be used for the pressure of control stripper, guarantee that the acid gas that removes emits.Described desulfurizing tower is a plurality of, a plurality of desulfurizing tower connection in series-parallel are between knockout drum and high altitude discharge pipe, these desulfurizing towers can switch by the reversal valve that arranges, described a plurality of desulfurizing tower is divided into 2～3 groups, formed by 1 desulfurizing tower or 2 desulfurizing towers that are in series for every group, be convenient to switching or the maintenance of desulfurizing tower absorption after saturated.Filling is the desulfurizing agent of solid active iron oxide in the described desulfurizing tower, and the Sulfur capacity of ferric oxide desulfurizer is big, price is low, air regenesis at normal temperatures, and can remove H2S in the acid gas under oxygen free condition, and desulfurized effect is good.
Description of drawings
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the schematic diagram of prior art.
In the accompanying drawing, 1 is stripper, and 2 is return tank, and 3 is gas discharge outlet, and 4 is pressure-regulating valve, and 5 is knockout drum, and 6 is first desulfurizing tower, and 7 is second desulfurizing tower, and 8 is the 3rd desulfurizing tower, and 9 is the high altitude discharge pipe, and 10 is first reversal valve, and 11 is second reversal valve.
The specific embodiment
Referring to Fig. 1, a kind of acid gas discharging pre-procesor of LNG production equipment, comprise stripper 1, described stripper 1 lower end is provided with return tank 2, the upper end sidewall of described return tank 2 is provided with gas discharge outlet 3, described gas discharge outlet 3 connects the pressure-regulating valve that is used for the control pressure of stripping tower by pipeline, guarantees that the acid gas that removes emits.The downstream of described pressure-regulating valve 4 sets gradually knockout drum 5, desulfurizing tower, and the drying that described knockout drum 5 is used for acid gas is handled, and has guaranteed desulfurized effect.The import of described knockout drum 5 connects pressure-regulating valve 4 by pipeline, and the outlet at described knockout drum 5 tops is by the import of pipeline connection desulfurizing tower, and the outlet of described desulfurizing tower connects high altitude discharge pipe 9.Described desulfurizing tower is a plurality of, and described a plurality of desulfurizing towers are divided into 2～3 groups, is made up of 1 desulfurizing tower or 2 desulfurizing towers that are in series for every group, and every group of desulfurizing tower can switch by the reversal valve that arranges, and is convenient to switching or the maintenance of desulfurizing tower absorption after saturated.The desulfurizing tower of present embodiment is 3, and 3 desulfurizing towers are divided into 2 groups.The outlet at described knockout drum 5 tops connects the import of first desulfurizing tower 6 by pipeline, and the outlet of described first desulfurizing tower 6 connects the import of second desulfurizing tower 7 by pipeline, and the outlet of described second desulfurizing tower 7 connects high altitude discharge pipe 9 by pipeline.The import of described the 3rd desulfurizing tower 8 is by the outlet at pipeline connection knockout drum 5 tops, and the outlet of described the 3rd desulfurizing tower 8 connects high altitude discharge pipe 9 by pipeline.Pipeline between the outlet of the import of described first desulfurizing tower 6 and gas-liquid separation tank top is provided with first reversal valve 10, and the pipeline between the outlet at the import of described the 3rd desulfurizing tower 8 and knockout drum 5 tops is provided with second reversal valve 11.Filling is the desulfurizing agent of solid active iron oxide in the described desulfurizing tower.The Sulfur capacity of described ferric oxide desulfurizer is big, price is low, air regenesis at normal temperatures, and can remove the H2S in the acid gas under oxygen free condition.
Desulfurizing agent in the described desulfurizing tower is with the H in the acid gas
2S is adsorbed onto in the aperture of desulfurizing agent, thereby removes the H in the acid gas
2S has reduced the H of high altitude discharge gas
2S content makes H in the high altitude discharge gas
2S content is down to below the 1ppm, has reached the discharge standard of stipulating in the national relevant regulations.Again because of H in the high altitude discharge gas
2The reduction of S content is improved operation field personnel and people's living environment on every side greatly, has reduced the risk of poisoning when the post personnel patrol and examine.
Flow process of the present utility model is: stripper gas phase distillate can not be by total condensation, and gas phase distillate fixed gas causes tower top pressure to raise.When pressure was elevated to a certain degree, the pressure-regulating valve of opening on the upper end sidewall of return tank reduced pressure.When pressure is reduced to a certain degree, lodge in the stripper condensate liquid at first by force feed to return tank, acid gas also enters return tank then.The acid gas of band liquid flows into knockout drum by pressure-regulating valve again, and the acid gas of band liquid enters after the drying in knockout drum and carries out the desulfurization processing in the desulfurizing tower, removes the H in the acid gas
2High-altitude emptying behind the S.Arranged the pressure-regulating valve on the upper end sidewall of closing volume jar behind the fixed gas.
Claims (3)
1. the acid gas of a LNG production equipment discharges pre-procesor, comprise stripper, described stripper lower end is provided with return tank, the upper end sidewall of described return tank is provided with gas discharge outlet, described gas discharge outlet connects the pressure-regulating valve that is used for the control pressure of stripping tower by pipeline, it is characterized in that: the downstream of described pressure-regulating valve sets gradually knockout drum, desulfurizing tower, the import of described knockout drum connects pressure-regulating valve by pipeline, the outlet of described gas-liquid separation tank top is by the import of pipeline connection desulfurizing tower, and the outlet of described desulfurizing tower connects the high altitude discharge pipe.
2. the acid gas of LNG production equipment according to claim 1 discharges pre-procesor, it is characterized in that: described desulfurizing tower is a plurality of, described a plurality of desulfurizing tower is divided into 2～3 groups, be made up of 1 desulfurizing tower or 2 desulfurizing towers that are in series for every group, every group of desulfurizing tower can switch by the reversal valve that arranges.
3. according to the acid gas discharging pre-procesor of the arbitrary described LNG production equipment of claim 1～2, it is characterized in that: filling is the desulfurizing agent of solid active iron oxide in the described desulfurizing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066000 CN203139872U (en) | 2013-02-05 | 2013-02-05 | Acid gas exhaust preprocessing device of LNG (Liquefied Natural Gas) production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066000 CN203139872U (en) | 2013-02-05 | 2013-02-05 | Acid gas exhaust preprocessing device of LNG (Liquefied Natural Gas) production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203139872U true CN203139872U (en) | 2013-08-21 |
Family
ID=48967429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320066000 Expired - Lifetime CN203139872U (en) | 2013-02-05 | 2013-02-05 | Acid gas exhaust preprocessing device of LNG (Liquefied Natural Gas) production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203139872U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818068A (en) * | 2015-04-11 | 2015-08-05 | 山东科瑞机械制造有限公司 | High-hydrogen sulfide natural gas or oil field associated gas desulfurization system |
-
2013
- 2013-02-05 CN CN 201320066000 patent/CN203139872U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818068A (en) * | 2015-04-11 | 2015-08-05 | 山东科瑞机械制造有限公司 | High-hydrogen sulfide natural gas or oil field associated gas desulfurization system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |
|
| CX01 | Expiry of patent term |