CN1817411A - Top-push decreasing gas desulfurization at normal-pressure and apparatus thereof - Google Patents
Top-push decreasing gas desulfurization at normal-pressure and apparatus thereof Download PDFInfo
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- CN1817411A CN1817411A CN 200610018129 CN200610018129A CN1817411A CN 1817411 A CN1817411 A CN 1817411A CN 200610018129 CN200610018129 CN 200610018129 CN 200610018129 A CN200610018129 A CN 200610018129A CN 1817411 A CN1817411 A CN 1817411A
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- gas
- pressure
- desulphurization plant
- alkaline solution
- absorption tower
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Abstract
An ordinary-pressure desulfurizing technology for the gas from the top of pressure reducing tower includes such steps as delivering said gas into desulfurizing equipment, desulfurizing thegas, and generating negative pressure at the terminal end of the gas channel for desulfurizing equipment. Its ordinary-pressure desulfurizing apparatus is composed of absorption tower and the negative pressure generator. It features that the negative pressure is used to provide power to the gas to be desulfurized.
Description
Technical field
The present invention relates to be used for the technology and the device of gas sweetening, particularly technology and the device that the output methane gas of oil-refining chemical factory atmospheric and vacuum distillation unit decompression cat head is carried out desulfurization.
Background technology
Oil-refining chemical factory is when processing sulfur-bearing and sour crude, and the methane gas of its atmospheric and vacuum distillation unit decompression cat head mainly contains C
1, C
2, C
3, C
4, O
2, H
2, CO, CO
2, H
2S, H
2Components such as O, wherein, lighter hydrocarbons are (as C
3, C
4Deng) content lower, and H
2S content is up to about 30%.
Because the content of lighter hydrocarbons is lower, this part methane gas is recycled and is worth not quite, and therefore, in the existing processes, the methane gas of atmospheric and vacuum distillation unit decompression cat head is directly sent into heating furnace usually and burnt.But along with the strictness day by day of environmental protection requirement, this part contains H
2The too high gas of S does not allow directly to send heating furnace to burn.
In addition, existing process of desulfurizing gases mainly adopts the technology of pressurization desulfurization, and the technology of pressurization desulfurization is provided with gas pressurized equipment at the front end of desulphurization plant, provides power by pressing mode for the gas of need desulfurization.But the technology of pressurization desulfurization also is not suitable for the methane gas of oil-refining chemical factory atmospheric and vacuum distillation unit decompression cat head is carried out the desulfurization processing, its reason is: 1, methane gas derives from depressurized system, follow-up facility has the fluctuation on any pressure all can impact depressurized system, can cause the depressurized system cisco unity malfunction; 2, because the sulfur content height in the gas is therefore high to the corrosion-resistant requirement of pressurized equipment, not only can make equipment one-time investment cost height, also can cause the fault rate and the maintenance cost height of pressurized equipment simultaneously.
Summary of the invention
Technical problem to be solved by this invention is: a kind of top methane gas desulfurization at normal-pressure technology and the device of subtracting that provides, and this technology need not pressurized equipment, can depressurized system not impacted because of the fluctuation on the pressure, and technical process is simple, and system is reliable, invests low.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
Subtract top gas desulfurization at normal-pressure technology, its step comprises: the methane gas of the cat head that will reduce pressure output sends into the step of desulphurization plant, in desulphurization plant to methane gas carry out the step of desulfurization, in the terminal step that produces negative pressure of the gas circuit of desulphurization plant.
In the such scheme, the step of in desulphurization plant, methane gas being carried out desulfurization for alkaline solution in desulphurization plant to H
2The step that S gas absorbs.
In the such scheme, the temperature in the desulphurization plant is that to be lower than 70 ℃, the pressure of gas circuit front end be 700-860mmHg.
In the such scheme, alkaline solution is: monoethanolamine or diethanol amine or triethanolamine or diisopropanolamine (DIPA) or methyl diethanolamine or bulky amine.
Subtract top gas desulfurization at normal-pressure device, it comprises the absorption tower, is used at the terminal equipment that produces negative pressure of the gas circuit of desulfurizer, and the outer wall on absorption tower is provided with air inlet and gas outlet, and air inlet is communicated with decompression cat head delivery outlet; The gas outlet be used for being communicated with at the terminal equipment that produces negative pressure of the gas circuit of desulphurization plant.
In the such scheme, it also comprises the alkaline solution storage tank; Also be provided with inlet, liquid outlet on the outer wall on absorption tower; Inlet is communicated with the alkaline solution storage tank; Liquid outlet is arranged on the bottom on absorption tower.
In the such scheme, liquid outlet is communicated with alkaline solution recycling can, inlet respectively by the two-way pipeline; Valve all is housed on the pipeline.
In the such scheme, the absorption tower is provided with two-layer or two-layer above filling batch, and each filling batch top is equipped with spray equipment, and spray equipment is communicated with inlet.
In the such scheme, the bottom of filling batch is provided with gas distribution grid.
In the such scheme, being used at the terminal equipment that produces negative pressure of the gas circuit of desulphurization plant is that combustion furnace is or/and Venturi tube.
Compared with prior art, the invention has the advantages that:
1, processing step of the present invention is included in the terminal step that produces negative pressure of gas circuit of desulphurization plant, provide power by negative pressure for the gas of need desulfurization, need not pressurized equipment, and, can not cause corrosion the equipment that produces negative pressure because the sulfur content in the gas of gas circuit end is very low.
2, the gas temperature of technology of the present invention is below 70 ℃, and pressure is under the condition of 700-860mmHg, to the H in the decompression cat head methane gas
2S absorbs, to reach the purpose of desulfurization.
3, be provided with filling batch in the absorption tower of apparatus of the present invention, spray alkaline solution on the filling batch, methane gas enters the absorption tower from the below of filling batch, and the H in the methane gas is discharged in the top from filling batch behind filling batch
2S is absorbed by alkaline solution, contains H
2The alkaline solution of S is discharged from the liquid outlet of filling batch below to dirty.
4, filling batch be two-layer or two-layer more than, the quantity of filling batch can be according to H in the methane gas
2The content of S is determined, guarantees H
2S is fully absorbed, and makes desulphurization system that enough operating flexibilities be arranged, and can guarantee this system pressure drop≤8mmHg simultaneously, can depressurized system not impacted because of the fluctuation on the pressure.
5, the bottom of filling batch is provided with gas distribution grid, has guaranteed the even distribution of gas in tower.
6, being used at the terminal equipment that produces negative pressure of the gas circuit of desulphurization plant is combustion furnace or Venturi tube, and equipment cost is low, and operating cost is little.
7, technical process of the present invention is simple, and system is reliable, invests lowly, and operating cost is few.
Description of drawings
Fig. 1 is the process flow diagram of apparatus of the present invention
Fig. 2 is the structural representation on absorption tower
The direction of arrow among Fig. 1 is the flow direction of methane gas and alkaline solution.
The specific embodiment
The present invention subtracts top gas desulfurization at normal-pressure technology, and its step comprises: the methane gas of the cat head that will reduce pressure output sends into the step of desulphurization plant, in desulphurization plant to methane gas carry out the step of desulfurization, in the terminal step that produces negative pressure of the gas circuit of desulphurization plant.Wherein, the step of in desulphurization plant, methane gas being carried out desulfurization for alkaline solution in desulphurization plant to H
2The step that S gas absorbs.
Temperature in the above-mentioned desulphurization plant is that to be lower than 70 ℃, the pressure of gas circuit front end be 700-860mmHg.Alkaline solution is: monoethanolamine or diethanol amine or triethanolamine or diisopropanolamine (DIPA) or methyl diethanolamine or bulky amine.
The embodiment of apparatus of the present invention as shown in Figure 1, 2, it comprises absorption tower 1, is used at terminal equipment, alkaline solution storage tank, the alkaline solution recycling can that produces negative pressure of the gas circuit of desulphurization plant, and the outer wall on absorption tower 1 is provided with air inlet 2, gas outlet 4, inlet 5, liquid outlet 6.Air inlet 2 is communicated with decompression cat head delivery outlet.Gas outlet 4 is communicated with combustion furnace in the terminal Venturi tube that produces negative pressure of the gas circuit of desulphurization plant through being used for by a pipeline, and gas outlet 4 directly is communicated with the combustion furnace that is used in the gas circuit end generation negative pressure of desulphurization plant by another pipeline simultaneously.Inlet 5 is communicated with the alkaline solution storage tank; Liquid outlet 6 is arranged on the bottom on absorption tower 1.Liquid outlet 6 is communicated with alkaline solution recycling can, inlet 5 respectively by the two-way pipeline; Valve all is housed on the pipeline.
As shown in Figure 2, be provided with two-layer filling batch 3 in the absorption tower 1, the top of each filling batch 3 is provided with and is used for alkaline solution is evenly sprayed spray equipment 7 on the filling batch 3, and spray equipment 7 is communicated with inlet 5; Gas outlet 4 is arranged on 1 top, absorption tower of the top of filling batch 3, and air inlet 2 is arranged on the below of filling batch 3, and liquid outlet 6 is arranged on 1 bottom, absorption tower of filling batch 3 belows.
The bottom of lower floor's filling batch 3 is provided with gas distribution grid 10.Be provided with liquid collecting box 8 between two filling batch 3; Liquid collecting box 8 is communicated with the below of orlop filling batch 3 by pipeline 9.
Sample detecting element and flow monitoring element F1 all are set on the gas of apparatus of the present invention embodiment and the fluid pipeline.
The detailed process that the present invention subtracts top gas desulfurization at normal-pressure device embodiment is: contain H from the decompression cat head
2About 40 ℃ of the methane gas temperature of S about 30%, directly 1 air inlet 2 enters feed zone to the about 720-830mmHg of pressure (normal pressure) through the absorption tower, enter ground floor filling batch 3 through behind the gas distribution grid 10, fully contact at the filling surface of filling batch 3 with alkaline solution, absorb H wherein from spray equipment 7
2Enter next section filling batch 3 behind the S gas and further contact, absorb wherein remaining H with alkaline solution
2S gas.The top methane gas that subtracts that reaches quality requirement contains H
2S≤1%, methane gas are sent into combustion furnace or are directly entered combustion furnace through Venturi tube and act as a fuel and burn in 1 top from the absorption tower.
Fresh alkaline solution from the alkaline solution storage tank, enter the top of every section filling batch 3 respectively, spray uniformly to filling batch 3 through liquid phase spray equipment 7, at filling batch 3 diffusing heaps or after the stop regular hour of structured packing surface, the alkaline solution influent collecting box 8 of upper strata filling batch 3 and through pipeline 9 from the bottom that flows into absorption tower 1, the alkaline solution of lower floor's filling batch 3 flows directly into the bottom on absorption tower 1.
The pipeline that is communicated with liquid outlet 6 is provided with pump, and after pump was extracted the alkaline solution of bottom, absorption tower out, the flow control element on piping controlled to adjust, after sample detecting is analyzed, and can be according to the methane gas H of alkaline solution situation and output
2S content, decision will absorb H
2Alkaline solution behind the S continues to use as circulating absorption solution, still alkaline solution being sent into the alkaline solution recycling can regenerates and utilizes, alkaline solution recirculation after the regeneration is used as the fresh absorption liquid of native system, has so not only saved cost of investment but also has reduced operation energy consumption.
The present invention subtracts in the gas desulfurization at normal-pressure device of top, and the gas after the desulfurization can directly be delivered to combustion furnace, also can deliver to combustion furnace again and act as a fuel and burn after Venturi tube, also can deliver to after Venturi tube in other the equipment again and handle.
The present invention subtract in the gas desulfurization at normal-pressure device of top filling batch 3 also can be two-layer more than.
Claims (10)
1, subtract top gas desulfurization at normal-pressure technology, it is characterized in that: its step comprises: the methane gas of the cat head that will reduce pressure output sends into the step of desulphurization plant, in desulphurization plant to methane gas carry out the step of desulfurization, in the terminal step that produces negative pressure of the gas circuit of desulphurization plant.
2, technology as claimed in claim 1 is characterized in that: the step of step for H2S gas being absorbed in desulphurization plant with alkaline solution of methane gas being carried out desulfurization in desulphurization plant.
3, technology as claimed in claim 2 is characterized in that: the temperature in the desulphurization plant is that to be lower than 70 ℃, the pressure of gas circuit front end be 700-860mmHg.
4, technology as claimed in claim 2 is characterized in that: alkaline solution is: monoethanolamine or diethanol amine or triethanolamine or diisopropanolamine (DIPA) or methyl diethanolamine or bulky amine.
5, subtract top gas desulfurization at normal-pressure device, it is characterized in that: it comprises absorption tower (1), is used at the terminal equipment that produces negative pressure of the gas circuit of desulfurizer, the outer wall on absorption tower (1) is provided with air inlet (2) and gas outlet (4), and air inlet (2) is communicated with decompression cat head delivery outlet; Gas outlet (4) be used for being communicated with at the terminal equipment that produces negative pressure of the gas circuit of desulphurization plant.
6, device as claimed in claim 5 is characterized in that: it also comprises the alkaline solution storage tank; Also be provided with inlet (5), liquid outlet (6) on the outer wall on absorption tower (1); Inlet (5) is communicated with the alkaline solution storage tank; Liquid outlet (6) is arranged on the bottom of absorption tower (1).
7, device as claimed in claim 6 is characterized in that: liquid outlet (6) is communicated with alkaline solution recycling can, inlet (5) respectively by the two-way pipeline; Valve all is housed on the pipeline.
8, device as claimed in claim 5 is characterized in that: absorption tower (1) is provided with two-layer or two-layer above filling batch (3), and each filling batch (3) top is equipped with spray equipment (7), and spray equipment (7) is communicated with inlet (5).
9, device as claimed in claim 8 is characterized in that: the bottom of filling batch (3) is provided with gas distribution grid (10).
10, device as claimed in claim 5 is characterized in that: being used at the terminal equipment that produces negative pressure of the gas circuit of desulphurization plant is that combustion furnace is or/and Venturi tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100181290A CN100425324C (en) | 2006-01-10 | 2006-01-10 | Top-push decreasing gas desulfurization at normal-pressure and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100181290A CN100425324C (en) | 2006-01-10 | 2006-01-10 | Top-push decreasing gas desulfurization at normal-pressure and apparatus thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1817411A true CN1817411A (en) | 2006-08-16 |
| CN100425324C CN100425324C (en) | 2008-10-15 |
Family
ID=36917737
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100181290A Expired - Fee Related CN100425324C (en) | 2006-01-10 | 2006-01-10 | Top-push decreasing gas desulfurization at normal-pressure and apparatus thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862578A (en) * | 2010-02-11 | 2010-10-20 | 安庆实华工程设计有限责任公司 | Three-top gas online desulphurization and pressurizing utilization method of atmospheric and vacuum distillation unit |
| CN101475826B (en) * | 2008-11-21 | 2012-07-18 | 华东理工大学 | Atmospheric vacuum distillation process for light crude oil |
| CN110157512A (en) * | 2019-06-27 | 2019-08-23 | 山东清沂山石化科技有限公司 | A kind of processing unit and method of the device in Gas that PETROLEUM PROCESSING generates |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1006339C2 (en) * | 1997-06-17 | 1998-12-21 | Stork Eng & Contractors Bv | Process for desulfurizing waste gases. |
| DE10135370A1 (en) * | 2001-07-20 | 2003-01-30 | Basf Ag | Process for removing acid gases from a gas stream |
-
2006
- 2006-01-10 CN CNB2006100181290A patent/CN100425324C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475826B (en) * | 2008-11-21 | 2012-07-18 | 华东理工大学 | Atmospheric vacuum distillation process for light crude oil |
| CN101862578A (en) * | 2010-02-11 | 2010-10-20 | 安庆实华工程设计有限责任公司 | Three-top gas online desulphurization and pressurizing utilization method of atmospheric and vacuum distillation unit |
| CN110157512A (en) * | 2019-06-27 | 2019-08-23 | 山东清沂山石化科技有限公司 | A kind of processing unit and method of the device in Gas that PETROLEUM PROCESSING generates |
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| Publication number | Publication date |
|---|---|
| CN100425324C (en) | 2008-10-15 |
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Owner name: WUHAN SANLIAN ENERGY-SAVING ENVIRONMENTAL PROTECTI Free format text: FORMER OWNER: JIAHUA SCIENCE AND TECHNOLOGY CO., LTD., WUHAN Effective date: 20110420 Free format text: FORMER OWNER: CHEN SONGLIN |
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Free format text: CORRECT: ADDRESS; FROM: 430070 ROOM 1928, TOWER B, ASIA TRADE PLAZA, HONGSHAN DISTRICT, WUHAN CITY,HUBEI PROVINCE TO: 430074 NO. 2, GUANNAN 4TH ROAD, GUANNAN INDUSTRIAL PARK, DONGHU DEVELOPMENT ZONE, WUHAN CITY, HUBEI PROVINCE |
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Effective date of registration: 20110420 Address after: 430074 Hubei Industrial Development Zone, East Lake, South Industrial Park, No. four South Road, No. 2, No. Patentee after: Wuhan Sanlian Energy-saving Environmental Protection Engineering Co.Ltd Address before: 430070 Hubei province Wuhan city Hongshan District B Asia Trade Plaza, room 1928 Co-patentee before: Chen Songlin Patentee before: Jiahua Science and Technology Co., Ltd., Wuhan |
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