CN101481094A - Process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction - Google Patents
Process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction Download PDFInfo
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- CN101481094A CN101481094A CNA2008100006178A CN200810000617A CN101481094A CN 101481094 A CN101481094 A CN 101481094A CN A2008100006178 A CNA2008100006178 A CN A2008100006178A CN 200810000617 A CN200810000617 A CN 200810000617A CN 101481094 A CN101481094 A CN 101481094A
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- sulfuric acid
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- sulphuric acid
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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 invention provides a process for preparing sulphuric acid by the step reaction of sulfureted hydrogen. Raw material of sulfureted hydrogen and part of air are burnt incompletely at the front part of an air cooled reactor through a burner, generated mixing gas and cooled air entering along the internal wall of the reactor are burnt further, the sulfureted hydrogen is completely converted into sulfur dioxide; the sulfur dioxide passes through a waste heat boiler to generate high pressure steam for recycling the heat quantity and enters a convertor; the sulfur dioxide is catalyzed and oxidized into sulfur trioxide in a converter by adopting the way of subsection air sharp quenching; and the sulfur trioxide gas is absorbed into a concentration tower, higher than 97 percent sulphuric acid is obtained at the bottom of the tower and the tail gas at the top of the tower is purified and discharged.
Description
1. technical field
The invention provides a kind of process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction, belong to coal chemical technology.
2. background technology
At present, the hydrogen sulfide of Coal Chemical Industry by-product is mainly produced sulphur with Kraus process, promptly at first with air the partial vulcanization hydrogen-oxygen is changed into sulfurous gas, at H
2S/SO
2Mol ratio is under the condition of 2:1, generates sulphur with reaction on the catalyzer; In order to prevent pollution, also need the huge exhaust gas processing device of auxiliary construction, so the construction investment of sulphur production installation and productive expense are all very high to environment.Yet, the sulphur of producing with high cost so, 90% or more as production vitriolic raw material.If with hydrogen sulfide direct production sulfuric acid, can save the technological process of many complexity, the vitriolic production cost is reduced greatly.
Existing hydrogen sulfide directly prepares the sulfuric acid representative processes and mainly contains the Kang Kaite method of LURGI and the wet method of touching of separating of WSA-2 of rope company of Top.The Kang Kaite method is applicable to the production of sulfur from hydrogen sulfide acid of lower concentration, adopts two-stage Venturi condenser, condensing tower and silk screen and fiber scum dredger reclaim(ed) sulfuric acid, obtains 93% vitriol oil, complex process, and long flow path, sulfuric acid concentration is low.WSA-2 wets and separates the hydrogen sulfide that the method for touching is applicable to high density processing 40%-50%, the burning of hydrogen sulfide and the oxidation of sulfurous gas are carried out in same reactor, flow process is shorter, but it is too high in order to prevent temperature of reaction, be provided with SODIUMNITRATE, Sodium Nitrite fused salt cooling tube in reactor, operation easier and investment have raising greatly.
Because the aerial limits of explosion of hydrogen sulfide is 5.9%-27.2%, the hydrogen sulfide and the direct perfect combustion of air of existing high density just in time drop in the aerial limits of explosion scope of hydrogen sulfide, are difficult to adopt hydrogen sulfide directly to prepare sulfur process.
3. summary of the invention
Purpose of the present invention is exactly to provide a kind of process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction for the deficiency that overcomes the prior art existence.This advantages of simple technological process, heat recuperation rate height use that the concentration of hydrogen sulfide scope is wide, reaction conversion ratio and rate of recovery height, invest low, be easy to large-scale industrial production.
Technical scheme of the present invention:
The raw material hydrogen sulfide and approximately be 40% hydrogen sulfide burning generate sulfurous gas air by burner at the anterior incomplete combustion that takes place of gas cooled reactor, gas mixture that produces and the further reactive combustion of cooling air that enters along the gas cooled reactor inwall, hydrogen sulfide is converted into sulfurous gas fully; Sulfurous gas product gas enters convertor after producing high pressure steam recovery heat through waste heat boiler; Sulfurous gas product gas is through 3 sections or 4 sections beds catalyzed oxidations generation sulphur trioxides of convertor, and every layer of reaction liberated heat all dilutes cooling by the air of 2 of interlayers or 3 quench air inlets, 400～600 ℃ of maintenance temperature of reaction; Sulfur trioxide gas advances to absorb concentration tower, flows through absorber portion in the tower added 20%-70% by the dilute sulphuric acid sparger dilute sulphuric acid and has absorbed the sulphur trioxide in the gas, and tail gas takes off the after of mist section by cat head and effluxes; The dilute sulphuric acid of absorption sulphur trioxide is carried dense by the distillation of absorber portion filler, at the sulfuric acid that obtains at the bottom of the tower more than 97%; Sulfuric acid is sent outside by the water-cooled rear section through the sulfuric acid pump at the bottom of the tower, and the water mixing that part and dilution water inlet inject obtains dilute sulphuric acid as absorption agent.
4, description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Wherein: 1-burner, 2-gas cooled reactor, 3-gas cooled reactor inwall, 4-convertor, 5-quench air inlet, 6-beds, 7-are carried dense absorption tower, 8-sulfuric acid pump, 9-absorber portion, 10-takes off the mist section, 11-dilution water inlet, 12-dilute sulphuric acid sparger, 13-waste heat boiler.
5. embodiment
The present invention will be described in detail below in conjunction with accompanying drawing: the raw material hydrogen sulfide and approximately be 40% hydrogen sulfide burning generate sulfurous gas air by burner 1 at the gas cooled reactor 2 anterior incomplete combustions that take place, gas mixture that produces and the further reactive combustion of cooling air that enters along gas cooled reactor inwall 3, hydrogen sulfide is converted into sulfurous gas fully; Sulfurous gas product gas enters convertor 4 after producing high pressure steam recovery heat through waste heat boiler 13; Sulfurous gas product gas is through 3 sections or 4 sections beds 6 catalyzed oxidations generation sulphur trioxides of convertor 4, and every layer of reaction liberated heat all dilutes cooling by the air of 2 of interlayers or 3 quench air inlets 5,400～600 ℃ of maintenance temperature of reaction; Sulfur trioxide gas advances to absorb concentration tower 7, flows through absorber portion in the tower 9 and has been absorbed the sulphur trioxide in the gas by the dilute sulphuric acid that adds 20%-70% by dilute sulphuric acid sparger 12, and tail gas takes off 10 afters of mist section by cat head and effluxes; The dilute sulphuric acid of absorption sulphur trioxide is carried dense by the distillation of absorber portion 9 fillers, at the sulfuric acid that obtains at the bottom of the tower more than 97%; Sulfuric acid is sent outside by the water-cooled rear section through sulfuric acid pump 8 at the bottom of the tower, and the water mixing that part and dilution water inlet 11 inject obtains dilute sulphuric acid as absorption agent.
This technology vitriolic concentration can reach 98%, and total recovery is 99.7%.
Claims (1)
1. the invention provides a kind of process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction, it is characterized in that the raw material hydrogen sulfide and approximately be 40% hydrogen sulfide burning generate sulfurous gas air by burner at the anterior incomplete combustion that takes place of gas cooled reactor, gas mixture that produces and the further reactive combustion of cooling air that enters along the gas cooled reactor inwall, hydrogen sulfide is converted into sulfurous gas fully; Sulfurous gas product gas enters convertor after producing high pressure steam recovery heat through waste heat boiler; Sulfurous gas product gas is through 3 sections or 4 sections beds catalyzed oxidations generation sulphur trioxides of convertor, and every layer of reaction liberated heat all dilutes cooling by the air of 2 of interlayers or 3 quench air inlets, 400～600 ℃ of maintenance temperature of reaction; Sulfur trioxide gas advances to absorb concentration tower, flows through absorber portion in the tower added 20%-70% by the dilute sulphuric acid sparger dilute sulphuric acid and has absorbed the sulphur trioxide in the gas, and tail gas takes off the after of mist section by cat head and effluxes; The dilute sulphuric acid of absorption sulphur trioxide is carried dense by the distillation of absorber portion filler, at the sulfuric acid that obtains at the bottom of the tower more than 97%; Sulfuric acid is sent outside by the water-cooled rear section through the sulfuric acid pump at the bottom of the tower, and the water mixing that part and dilution water inlet inject obtains dilute sulphuric acid as absorption agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100006178A CN101481094A (en) | 2008-01-11 | 2008-01-11 | Process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100006178A CN101481094A (en) | 2008-01-11 | 2008-01-11 | Process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction |
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| CN101481094A true CN101481094A (en) | 2009-07-15 |
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| CNA2008100006178A Pending CN101481094A (en) | 2008-01-11 | 2008-01-11 | Process for preparing sulfuric acid by sulfurated hydrogen stepwise reaction |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205202A (en) * | 2010-03-29 | 2011-10-05 | 北京丰汉工程咨询有限公司 | Processing method for acid gas containing H2S |
| CN102556982A (en) * | 2011-12-30 | 2012-07-11 | 江苏新宏大集团有限公司 | Low-temperature exhaust heat system for sulfuric acid recovering device and application of low-temperature exhaust heat system |
| CN103072957A (en) * | 2013-01-24 | 2013-05-01 | 中冶焦耐工程技术有限公司 | Technology for preparing sulfuric acid |
| CN103264994A (en) * | 2013-06-04 | 2013-08-28 | 刘立文 | Method for producing sulphuric acid by adopting wet process |
| CN103318847A (en) * | 2013-07-08 | 2013-09-25 | 中石化南京工程有限公司 | High-efficiency sulfur recovery method of waste gas containing hydrogen sulfide |
| CN103547550A (en) * | 2011-04-20 | 2014-01-29 | 苏尔瓦里斯股份有限公司 | Conversion of acid gas to sulphate or phosphate-based fertilizers |
| CN103803506A (en) * | 2012-11-08 | 2014-05-21 | 中国石油化工股份有限公司 | Hydrogen sulfide wet sulfuric acid preparation method with low emission |
| RU2530077C2 (en) * | 2013-01-15 | 2014-10-10 | Открытое акционерное общество "Научно-исследовательский институт по удобрениям и инсектофунгицидам им. проф. Я.В. Самойлова" (ОАО "НИУИФ") | Method of producing sulphuric acid and apparatus therefor |
-
2008
- 2008-01-11 CN CNA2008100006178A patent/CN101481094A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205202A (en) * | 2010-03-29 | 2011-10-05 | 北京丰汉工程咨询有限公司 | Processing method for acid gas containing H2S |
| CN103547550A (en) * | 2011-04-20 | 2014-01-29 | 苏尔瓦里斯股份有限公司 | Conversion of acid gas to sulphate or phosphate-based fertilizers |
| CN103547550B (en) * | 2011-04-20 | 2016-01-20 | 苏尔瓦里斯股份有限公司 | Sour gas is to the conversion of vitriol base manure material or phosphate base fertilizer |
| CN102556982A (en) * | 2011-12-30 | 2012-07-11 | 江苏新宏大集团有限公司 | Low-temperature exhaust heat system for sulfuric acid recovering device and application of low-temperature exhaust heat system |
| CN102556982B (en) * | 2011-12-30 | 2015-04-22 | 凯密迪公司 | Low-temperature exhaust heat system for sulfuric acid recovering device and application of low-temperature exhaust heat system |
| CN103803506A (en) * | 2012-11-08 | 2014-05-21 | 中国石油化工股份有限公司 | Hydrogen sulfide wet sulfuric acid preparation method with low emission |
| RU2530077C2 (en) * | 2013-01-15 | 2014-10-10 | Открытое акционерное общество "Научно-исследовательский институт по удобрениям и инсектофунгицидам им. проф. Я.В. Самойлова" (ОАО "НИУИФ") | Method of producing sulphuric acid and apparatus therefor |
| CN103072957A (en) * | 2013-01-24 | 2013-05-01 | 中冶焦耐工程技术有限公司 | Technology for preparing sulfuric acid |
| CN103264994A (en) * | 2013-06-04 | 2013-08-28 | 刘立文 | Method for producing sulphuric acid by adopting wet process |
| CN103318847A (en) * | 2013-07-08 | 2013-09-25 | 中石化南京工程有限公司 | High-efficiency sulfur recovery method of waste gas containing hydrogen sulfide |
| CN103318847B (en) * | 2013-07-08 | 2016-06-15 | 中石化南京工程有限公司 | A kind of High-efficiency sulfur recovery of sulfide hydrogen waste gas |
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Open date: 20090715 |