CN111330413A - Petroleum cracking gasification substance desulfurization device - Google Patents
Petroleum cracking gasification substance desulfurization device Download PDFInfo
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- CN111330413A CN111330413A CN202010089559.1A CN202010089559A CN111330413A CN 111330413 A CN111330413 A CN 111330413A CN 202010089559 A CN202010089559 A CN 202010089559A CN 111330413 A CN111330413 A CN 111330413A
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- desulfurization
- tower
- tower body
- absorbent
- petroleum cracking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/20478—Alkanolamines
- B01D2252/20484—Alkanolamines with one hydroxyl group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
Abstract
The invention relates to a desulfurization device for petroleum cracking gasification substances, which belongs to the technical field of petroleum cracking gas treatment and comprises a first desulfurization tower and a second desulfurization tower, wherein absorbents are respectively contained in the first desulfurization tower and the second desulfurization tower, the first desulfurization tower is communicated with the second desulfurization tower, the first desulfurization tower comprises a first tower body and a reverse reaction tower, the upper end of the first tower body is provided with an air inlet, the bottom of the first tower body is communicated with the reverse reaction tower through a first one-way pump and a first one-way electromagnetic valve, a first desulfurization layer is arranged in the first tower body, a second desulfurization layer is arranged in the second desulfurization tower, the first desulfurization layer and the second desulfurization layer are U-shaped bent pipes and are provided with spray openings, the absorbent in the first desulfurization tower is ethanolamine, and the absorbent in the second desulfurization tower is sodium hydroxide; the main reaction in the petroleum cracking gasification substance is in the first desulfurizing tower, and the second desulfurizing tower removes the residual sulfur impurities, thereby reducing the consumption of the sodium hydroxide absorbent, saving the cost and simultaneously avoiding the incomplete desulfurization of the petroleum cracking gasification substance.
Description
Technical Field
The invention relates to the technical field of petroleum cracking gas treatment, in particular to a desulfurization device for petroleum cracking gasification substances.
Background
In petrochemical production, a fractionated product of petroleum is commonly used as a raw material, and hydrocarbons having long-chain molecules are cracked into various short-chain gaseous hydrocarbons and a small amount of liquid hydrocarbons using a higher temperature than cracking to provide an organic chemical raw material. This process is referred to in the industry as cracking of petroleum, which is a more advanced cracking process for petroleum based short chain unsaturated hydrocarbons. The petroleum cracking gas contains hydrogen sulfide, wherein one part of the hydrogen sulfide is brought by cracking raw materials, and the other part of the hydrogen sulfide is generated by the hydrogenolysis reaction between organic sulfides contained in the cracking raw materials and hydrogen in the high-temperature cracking process. The hydrogen sulfide in the cracking gas can corrode the pipeline of the equipment, so that the service life of the molecular sieve for drying is shortened, and the catalyst for hydrogenation and acetylene removal can be poisoned, thereby being unfavorable for subsequent production. The cracked gasification material must be purified of hydrogen sulfide. Common desulfurization methods include an alkali washing method and an alcohol amine method, wherein the alkali washing method is thorough in desulfurization, but the consumption of an absorbent is large; considering that the recycling of the absorbent is generally carried out by using an alcohol amine method for desulfurization, the alcohol amine method has a risk of incomplete desulfurization. In order to solve the contradiction of the desulfurization problem in the desulfurization process, the desulfurization device for the petroleum cracking gasification substance is provided.
Disclosure of Invention
Aiming at the contradiction between the large consumption of the alkaline washing absorbent and the incomplete desulfurization by the alcohol amine method in the desulfurization process in the prior art, the invention provides a desulfurization device for petroleum cracking gasification substances, which is realized by the following technical scheme:
the utility model provides a petroleum cracking gasification material desulphurization unit, includes first desulfurizing tower and second desulfurizing tower, all contain the absorbent in first desulfurizing tower and the second desulfurizing tower, first desulfurizing tower and second desulfurizing tower are linked together, first desulfurizing tower includes first tower body and reverse reaction tower, the air inlet has been seted up to first tower body upper end, first tower body bottom and reverse reaction tower pass through first unidirectional pump and first one way solenoid valve intercommunication, first tower body inside is provided with first desulfurization layer, the inside second desulfurization layer that is provided with of second desulfurizing tower, first desulfurization layer and second desulfurization layer are U type return bend and body and have seted up the mouth that sprays, absorbent in the first desulfurizing tower is ethanolamine, absorbent in the second desulfurizing tower is sodium hydroxide.
The invention is further configured to: the reverse reaction tower comprises a reaction tower body, an absorbent tower body, a gas tower body and a compressed gas source, wherein the absorbent tower body is communicated with the reaction tower body through a second one-way pump and a second one-way solenoid valve, the compressed gas source is communicated with the reaction tower body through a third one-way pump and a third one-way solenoid valve, the absorbent tower body is communicated with a first desulfurization layer through a fourth one-way pump, the gas tower body is communicated with the reaction tower body through a fourth one-way solenoid valve, and a heating layer is arranged in the reaction tower body.
The invention is further configured to: and a pH sensor is arranged in the reaction tower body.
The invention is further configured to: and a temperature sensor is arranged in the reaction tower body.
The invention is further configured to: and a pressure sensor is arranged in the reaction tower body.
The invention is further configured to: the spraying opening of the first desulfurization layer pipe body faces the air inlet.
The invention is further configured to: and the spraying port of the second desulfurization layer pipe body faces the first tower body.
The invention is further configured to: the first desulfurization layer is provided with two layers at equal intervals along the vertical direction.
In conclusion, the beneficial technical effects of the invention are as follows:
the petroleum cracking gasification substance enters a first desulfurization tower through an air inlet, ethanolamine absorbent is sprayed out through a spraying port on a first desulfurization layer to react with impurities in the petroleum cracking gasification substance, the reacted petroleum cracking gasification substance enters a second desulfurization tower, and the sodium hydroxide absorbent in the second desulfurization tower reacts and eliminates the residual sulfur impurities in the petroleum cracking gasification substance; the main reaction in the petroleum cracking gasification substance is in the first desulfurizing tower, and the second desulfurizing tower removes the residual sulfur impurities, thereby reducing the consumption of the sodium hydroxide absorbent, saving the cost and avoiding the incomplete desulfurization of the petroleum cracking gasification substance.
Drawings
Fig. 1 is a front view for showing the structure of the present embodiment.
Fig. 2 is a plan view for showing the structure of the present embodiment.
Fig. 3 is a left side view for showing the structure of the present embodiment.
Fig. 4 is an enlarged schematic view for showing a portion a in fig. 1.
Reference numerals: 1. a first desulfurization tower; 2. a second desulfurization tower; 21. a second desulfurization layer; 3. an absorbent; 4. a first tower body; 41. an air inlet; 42. a first desulfurization layer; 5. a reverse reaction tower; 51. a reaction tower body; 52. an absorbent tower body; 53. a gas column; 54. compressing a gas source; 6. a spray port; 7. a first one-way pump; 8. a first one-way solenoid valve; 9. a second one-way pump; 10. a second one-way solenoid valve; 11. a third one-way pump; 12. a third one-way solenoid valve; 13. a fourth one-way pump; 14. and a fourth one-way solenoid valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Examples
As shown in fig. 1-4, the desulfurization device for petroleum cracking gasification substances disclosed in the present invention comprises a first desulfurization tower 1 and a second desulfurization tower 2, wherein the first desulfurization tower 1 and the second desulfurization tower 2 both contain an absorbent 3, the first desulfurization tower 1 is communicated with the second desulfurization tower 2, the first desulfurization tower 1 comprises a first tower body 4 and a reverse reaction tower 5, an air inlet 41 is formed at the upper end of the first tower body 4, the bottom of the first tower body 4 is communicated with the reverse reaction tower 5 through a first one-way pump 7 and a first one-way solenoid valve 8, a first desulfurization layer 42 is arranged inside the first tower body 4, a second desulfurization layer 21 is arranged inside the second desulfurization tower 2, both the first desulfurization layer 42 and the second desulfurization layer 21 are U-shaped elbows, and a spray opening 6 is formed in the pipe body, the absorbent 3 in the first desulfurization tower 1 is ethanolamine, and the absorbent 3 in the second desulfurization tower 2 is sodium hydroxide. The petroleum cracking gasification substance enters the first desulfurization tower 1 through the air inlet 41, the ethanolamine absorbent 3 is sprayed out through the spraying port 6 on the first desulfurization layer 42 to react with the petroleum cracking gasification substance impurities, the reacted petroleum cracking gasification substance enters the second desulfurization tower 2, and the sodium hydroxide absorbent 3 in the second desulfurization tower 2 reacts and eliminates the residual sulfur impurities in the petroleum cracking gasification substance; the main reaction in the petroleum cracking gasification substance is in the first desulfurizing tower 1, and the second desulfurizing tower 2 removes the residual sulfur impurities in the petroleum cracking gasification substance, thereby reducing the consumption of the sodium hydroxide absorbent 3, saving the cost and avoiding the incomplete desulfurization of the petroleum cracking gasification substance.
The first desulfurization layer 42 is provided with two layers at equal intervals in the vertical direction. The two layers of the first desulfurization layer 42 ensure that the first desulfurization tower 1 can completely desulfurize the petroleum cracking gasification substance. The spray openings 6 of the tubular bodies of the first desulfurization layer 42 face the gas inlet 41. The spraying direction of the absorbent 3 is opposite to the gas inlet direction of the petroleum cracking gasification substance, so that the absorbent 3 and impurities are fully reacted. The spraying port 6 of the second desulfurization layer 21 is towards the first tower 4. The spraying direction of the absorbent 3 is opposite to the air inlet direction of the petroleum cracking gasification substance, so that the absorbent 3 is ensured to fully react with impurities, and the residues of the impurities are avoided.
The reverse reaction tower 5 comprises a reaction tower body 51, an absorbent tower body 52, a gas tower body 53 and a compressed gas source 54, wherein the absorbent tower body 52 is communicated with the reaction tower body 51 through a second one-way pump 9 and a second one-way electromagnetic valve 10, the compressed gas source 54 is communicated with the reaction tower body 51 through a third one-way pump 11 and a third one-way electromagnetic valve 12, the absorbent tower body 52 is communicated with the first desulfurization layer 42 through a fourth one-way pump 13, the gas tower body 53 is communicated with the reaction tower body 51 through a fourth one-way electromagnetic valve 14, and a heating layer is arranged in the reaction tower body 51. A pH sensor, a temperature sensor and a pressure sensor are provided in the reaction tower body 51. The temperature sensor is used to detect the temperature in the reaction tower body 51 to ensure that the temperature in the reaction tower body 51 is appropriate when the reverse reaction occurs. The pressure sensor is used to detect the pressure in the reaction tower 51 to ensure that the pressure in the reaction tower 51 is suitable when the reverse reaction is taking place.
Specific implementation of this example:
petroleum cracking gasification substances enter the first tower body 4 through the air inlet 41, the ethanolamine absorbent 3 in the absorbent tower body 52 is pumped into the first desulfurization layer 42 by the fourth one-way pump 13, and the ethanolamine absorbent 3 is sprayed into the inner cavity of the first tower body 4 through the spraying port 6 on the first desulfurization layer 42 and reacts with impurities of the petroleum cracking gasification substances;
the first one-way electromagnetic valve 8 is opened, the first one-way pump 7 pumps the reacted ethanolamine absorbent 3 into the reaction tower body 51, the reaction temperature of the reaction tower body 51 is detected through a temperature sensor and a pressure sensor, and a heating layer and a compressed air source 54 are controlled to heat and/or pressurize the reaction tower body 51, so that the reaction conditions in the reaction tower body 51 are ensured to be proper, and when the pH sensor detects that the pH value in the reaction tower body 51 reaches the standard, the second one-way electromagnetic valve 10 is opened, and the ethanolamine absorbent 3 is pumped into the absorbent tower body 52 through the second one-way pump 9;
the reacted petroleum cracking gasification substance enters the second desulfurization tower 2, and the sodium hydroxide absorbent 3 is sprayed into the inner cavity of the second desulfurization tower 2 through the spraying port 6, so that impurities in the petroleum cracking gasification substance are thoroughly removed.
Claims (8)
1. The utility model provides a petroleum cracking gasification material desulphurization unit, its characterized in that, includes first desulfurizing tower (1) and second desulfurizing tower (2), all contain absorbent (3) in first desulfurizing tower (1) and second desulfurizing tower (2), first desulfurizing tower (1) and second desulfurizing tower (2) are linked together, first desulfurizing tower (1) includes first tower body (4) and reverse reaction tower (5), air inlet (41) have been seted up to first tower body (4) upper end, first tower body (4) bottom and reverse reaction tower (5) are through first one-way pump (7) and first one-way solenoid valve (8) intercommunication, first tower body (4) inside is provided with first desulfurization layer (42), second desulfurizing tower (2) inside is provided with second desulfurization layer (21), first desulfurization layer (42) and second desulfurization layer (21) are U type return bend and the body has seted up and have sprayed mouth (6), the absorbent (3) in the first desulfurization tower (1) is ethanolamine, and the absorbent (3) in the second desulfurization tower (2) is sodium hydroxide.
2. The desulfurization device for petroleum cracking gasification substances according to claim 1, wherein the reverse reaction tower (5) comprises a reaction tower body (51), an absorbent tower body (52), a gas tower body (53) and a compressed gas source (54), the absorbent tower body (52) is communicated with the reaction tower body (51) through a second one-way pump (9) and a second one-way solenoid valve (10), the compressed gas source (54) is communicated with the reaction tower body (51) through a third one-way pump (11) and a third one-way solenoid valve (12), the absorbent tower body (52) is communicated with the first desulfurization layer (42) through a fourth one-way pump (13), the gas tower body (53) is communicated with the reaction tower body (51) through a fourth one-way solenoid valve (14), and a heating layer is arranged in the reaction tower body (51).
3. The desulfurization apparatus for petroleum cracking gasification substance according to claim 1, wherein a pH sensor is provided in the reaction tower body (51).
4. The desulfurization apparatus for petroleum cracking gasification substance according to claim 1, wherein a temperature sensor is provided in said reaction tower body (51).
5. The desulfurization apparatus for petroleum cracking gasification substance according to claim 1, wherein a pressure sensor is provided in said reaction tower body (51).
6. The desulfurization apparatus for petroleum cracking gasification substance according to claim 1, wherein the spray opening (6) of the tubular body of the first desulfurization layer (42) faces the gas inlet (41).
7. The desulfurization apparatus for petroleum cracking gasification substance according to claim 1, wherein the spray opening (6) of the tubular body of the second desulfurization layer (21) is directed toward the first tower body (4).
8. The desulfurization apparatus for a petroleum cracking gasification substance according to claim 6, wherein the first desulfurization layer (42) is provided with two layers at equal intervals in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010089559.1A CN111330413A (en) | 2020-02-13 | 2020-02-13 | Petroleum cracking gasification substance desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010089559.1A CN111330413A (en) | 2020-02-13 | 2020-02-13 | Petroleum cracking gasification substance desulfurization device |
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| Publication Number | Publication Date |
|---|---|
| CN111330413A true CN111330413A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010089559.1A Pending CN111330413A (en) | 2020-02-13 | 2020-02-13 | Petroleum cracking gasification substance desulfurization device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0202600A2 (en) * | 1985-05-22 | 1986-11-26 | BASF Aktiengesellschaft | Process for eliminating carbon dioxide and/or hydrogen sulfide from gases |
| CN1118146A (en) * | 1993-02-18 | 1996-03-06 | Abb弗莱克蒂公司 | Process and apparatus for absorbing hydrogen sulphide |
| CN1169335A (en) * | 1996-07-02 | 1998-01-07 | 四川川化集团公司 | Method for taking off hydrogen sulfide from mixed gas |
| CN101524613A (en) * | 2008-09-12 | 2009-09-09 | 江苏工业学院 | Method for regenerating absorbent |
| CN103357250A (en) * | 2012-04-06 | 2013-10-23 | 李志远 | Facility and process for collecting carbon dioxide and/or hydrogen sulfide from gas mixture |
| CN103754833A (en) * | 2014-01-26 | 2014-04-30 | 中建安装工程有限公司 | Device and method for producing sodium bisulfide by utilizing refinery dry gas |
| CN107774063A (en) * | 2016-08-31 | 2018-03-09 | 杜富德 | Renewable circulating liquid formula air cleaning unit and purification method |
-
2020
- 2020-02-13 CN CN202010089559.1A patent/CN111330413A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0202600A2 (en) * | 1985-05-22 | 1986-11-26 | BASF Aktiengesellschaft | Process for eliminating carbon dioxide and/or hydrogen sulfide from gases |
| CN1118146A (en) * | 1993-02-18 | 1996-03-06 | Abb弗莱克蒂公司 | Process and apparatus for absorbing hydrogen sulphide |
| CN1169335A (en) * | 1996-07-02 | 1998-01-07 | 四川川化集团公司 | Method for taking off hydrogen sulfide from mixed gas |
| CN101524613A (en) * | 2008-09-12 | 2009-09-09 | 江苏工业学院 | Method for regenerating absorbent |
| CN103357250A (en) * | 2012-04-06 | 2013-10-23 | 李志远 | Facility and process for collecting carbon dioxide and/or hydrogen sulfide from gas mixture |
| CN103754833A (en) * | 2014-01-26 | 2014-04-30 | 中建安装工程有限公司 | Device and method for producing sodium bisulfide by utilizing refinery dry gas |
| CN107774063A (en) * | 2016-08-31 | 2018-03-09 | 杜富德 | Renewable circulating liquid formula air cleaning unit and purification method |
Non-Patent Citations (1)
| Title |
|---|
| 邹仁鋘 等: "《石油化工分离原理与技术》", 30 November 1988, 化学工业出版社, pages: 16 - 17 * |
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Application publication date: 20200626 |
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