CN100554147C - A kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing - Google Patents
A kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing Download PDFInfo
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- CN100554147C CN100554147C CNB2006100415772A CN200610041577A CN100554147C CN 100554147 C CN100554147 C CN 100554147C CN B2006100415772 A CNB2006100415772 A CN B2006100415772A CN 200610041577 A CN200610041577 A CN 200610041577A CN 100554147 C CN100554147 C CN 100554147C
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- roasting kiln
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The present invention relates to a kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing.Acid hydrogen sulfide gas enters respectively in proportion in first, second sulfureted hydrogen burning stove and burns, the high-temperature furnace gas that comes out from first roasting kiln, pass through burner-gas cooler, arrived certain temperature by air cooling, enter then second roasting kiln with the sulfide hydrogen sour gas that replenishes continue with furnace gas in surplus air burn, the high-temperature furnace gas that second roasting kiln comes out enters the waste heat boiler heat extraction, enters purification section again, transforms workshop section, dry absorption section carries out conventional relieving haperacidity.
Description
Technical field:
The invention belongs to chemical production field, relate to a kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing.
Background technology:
Although the hydrogen sulfide sour gas that refinery produces in the oil product course of processing has adopted the selective desulfurization agent, and arrange accordingly some equipment improve concentration of hydrogen sulfide in sour gas, the sour gas quality is still unstable, it is more to carry hydrocarbons secretly.Because hydrogen sulfide sour gas calorific value is 3.54GJ/Nm
3, and the calorific value of hydro carbons is 41.8GJ/Nm
3, difference is bigger, carries hydrocarbons secretly more for a long time in the hydrogen sulfide sour gas, causes the roasting kiln furnace temperature to be difficult to control, and furnace temperature will be raised to 1200 ℃ of ultimate temperatures in the short period of time, is forced to spray cooling, causes operational difficulty.If blast a large amount of air cooling-downs, then can reduce roasting kiln outlet SO
2Concentration, SO
2Concentration is crossed low then can not satisfy relieving haperacidity conversion autothermal equilibrium and the requirement of dried suction equilibrated.
Summary of the invention:
The objective of the invention is to propose a kind of acid hydrogen sulfide gas that utilizes the high hydrocarbon-containing that refinery produces in the oil product course of processing, by burning the element sulphur in the flue gas being prepared into sulfuric acid is reclaimed, remove element sulphur to greatest extent, satisfy strict environmental requirement.
The present invention is achieved like this: the acid hydrogen sulfide gas that utilizes the high hydrocarbon-containing that refinery produces in the oil product course of processing, by the burning hydrogen sulfide prepare sulfuric acid, the burning that it is characterized in that acid hydrogen sulfide gas be with sour gas in proportion segmentation burn at two roasting kilns.First roasting kiln blasts the required whole air of system, advance the first roasting kiln sour gas tolerance by 1100 ℃ of furnace temperature of control with the adjusting of getting off, advance at sour gas on the pipeline of first roasting kiln intake valve to be set and furnace temperature is chain, when furnace temperature surpasses 1100 ℃, intake valve turns down, when furnace temperature was lower than 1100 ℃, intake valve open was big.First roasting kiln outlet high-temperature furnace gas is removed unnecessary heat by burner-gas cooler, furnace gas after the cooling enters second roasting kiln with the hydrogen sulfide that is left again and continues reaction, the heat that burner-gas cooler need be removed is by controlling second 1100 ℃ of the furnace temperature of burning with the adjusting of getting off, because of the burner-gas cooler area is by heat upper limit value, can overtemperature under the second roasting kiln normal condition, surpass 1100 ℃ as furnace temperature, then toward the interior spray cooling of stove.Be provided with a short circuit by-pass between two roasting kilns, the high-temperature valve on the short circuit by-pass and the second burning furnace temperature are chain, and when furnace temperature was lower than 1100 ℃, high-temperature valve was opened greatly.Two roasting kilns all adopt negative-pressure operation; The atmosphere of operation of two roasting kilns is by the chain sulfurous gas blower fan control of outlet oxygen concn.
Can guarantee SO so on the one hand
2Concentration can satisfy relieving haperacidity and transform autothermal equilibrium and do the requirement of suction equilibrated, can guarantee also that on the other hand roasting kiln can move with security and stability.
Embodiment:
Below in conjunction with embodiment the inventive method is described in detail.
Embodiment:
The embodiment of the invention is that the sour gas sulphuric acid plant of the sulfide hydrogen (hydrocarbons content height) with certain refinery is an example, and gas condition is as follows:
Temperature: 40 ℃; Pressure: 0.065MPa; Flow: 2400kg/h;
Form: H
2S CO
2HC NH
3H
2O
(wt%) 55.6 37.3 4.3 0.8 is saturated
Acid hydrogen sulfide gas enters respectively in first, second sulfureted hydrogen burning stove in about 4: 1 ratio and burns.When conversion post main blower is bled, be negative-pressure operation in the sulfureted hydrogen burning stove, acid hydrogen sulfide gas sucks roasting kiln with air through the hydrogen sulfide spray gun, and temperature of combustion is controlled at about 1000 ℃.When the first roasting kiln overtemperature, transfer the sour gas tolerance that enters second roasting kiln greatly, enter the first roasting kiln hydrogen sulfide tolerance with minimizing, the first roasting kiln furnace temperature is reduced.The second roasting kiln Control for Kiln Temperature can realize by the high temperature butterfly valve of regulating between first roasting kiln and second roasting kiln.Go into the oxygen table control of the air capacity of stove by heat boiler outlet, oxygen concn is controlled at about 8%.
About 1000 ℃ the furnace gas that comes out from first roasting kiln, pass through burner-gas cooler, arrived about about 700 ℃ by air cooling, enter then second roasting kiln with the sulfide hydrogen sour gas that replenishes continue with furnace gas in surplus air burn, the sulfur dioxide gas that contains that second roasting kiln comes out about 1000 ℃ enters the waste heat boiler heat extraction, furnace gas temperature is reduced to about 400 ℃ by 1000 ℃, deliver to purification section cooling dehydration, enter again and transform workshop section, dry absorption section carries out conventional relieving haperacidity, produces 30000 tons in sulfuric acid per year.
Claims (5)
1, a kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing, it is hydrogen sulfide acid gas to prepare sulfuric acid with high hydrocarbon-containing, the burning that it is characterized in that sour gas be with sour gas in proportion segmentation burn at two roasting kilns, first roasting kiln blasts the required whole air of system, advance the first roasting kiln sour gas tolerance by 1100 ℃ of furnace temperature of control with the adjusting of getting off, advance at sour gas on the pipeline of first roasting kiln intake valve to be set and furnace temperature is chain, when furnace temperature surpasses 1100 ℃, intake valve turns down, when furnace temperature was lower than 1100 ℃, intake valve open was big; First roasting kiln outlet high-temperature furnace gas is removed unnecessary heat by burner-gas cooler, furnace gas after the cooling enters second roasting kiln with remaining hydrogen sulfide again and continues reaction, and the heat that burner-gas cooler need be removed is by controlling 1100 ℃ of the second burning furnace temperature with the adjusting of getting off.
2,, it is characterized in that the allocation proportion of sour gas in two roasting kilns is to control according to the furnace temperature of first roasting kiln according to the described preparation vitriolic of claim 1 method.
3,, it is characterized in that between two roasting kilns, adopting burner-gas cooler to remove unnecessary heat, and add the short circuit by-pass according to the described preparation vitriolic of claim 1 method.
4,, it is characterized in that two roasting kilns all adopt negative-pressure operation according to the described preparation vitriolic of claim 1 method.
5, according to the described preparation vitriolic of claim 1 method, the atmosphere of operation that it is characterized in that two roasting kilns is by the chain sulfurous gas blower fan control of outlet oxygen concn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100415772A CN100554147C (en) | 2006-09-15 | 2006-09-15 | A kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100415772A CN100554147C (en) | 2006-09-15 | 2006-09-15 | A kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101143714A CN101143714A (en) | 2008-03-19 |
| CN100554147C true CN100554147C (en) | 2009-10-28 |
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| CNB2006100415772A Active CN100554147C (en) | 2006-09-15 | 2006-09-15 | A kind of method of utilizing the acid gas to prepare sulfuric acid of high hydrocarbon-containing |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2416872B1 (en) * | 2009-04-08 | 2015-08-12 | Shell Internationale Research Maatschappij B.V. | Method of treating an acid gas stream and an apparatus therefor |
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Address after: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: Nanhua Group Research Institute |
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