CN104445094A - Sulfuric acid production process - Google Patents
Sulfuric acid production process Download PDFInfo
- Publication number
- CN104445094A CN104445094A CN201310435617.1A CN201310435617A CN104445094A CN 104445094 A CN104445094 A CN 104445094A CN 201310435617 A CN201310435617 A CN 201310435617A CN 104445094 A CN104445094 A CN 104445094A
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- sulfuric acid
- gas
- acid production
- production process
- furnace gas
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a sulfuric acid production process which is characterized by comprising the following processing steps: (1) pulverizing and screening: selecting pyrite from ores, pulverizing, and screening to pick out appropriate 4-5 mm pyrite granules; (2) roasting; (3) purifying; (4) performing reaction heat recovery: by arranging a steam evaporator tube bank in a waste heat boiler, cooling boiler gas to obtain reaction heat, and conveying to a water circulation system or other thermodynamic systems through the steam evaporator tube bank; (5) drying; (6) converting: introducing the gas into a conversion system through a sulfur dioxide blower, and oxidizing sulfur dioxide in the raw boiler gas into sulfur trioxide gas under the catalytic action of a vanadium catalyst; and (7) absorbing. The process disclosed by the invention is reasonable and simple, greatly shortens the process flow, thoroughly utilizes the raw materials, and reduces the discharge of pollutants. Above all, the process improves the recovery rate of low temperature waste heat in the sulfuric acid preparation industry, and avoids the waste of energy resources and the like, thus being suitable for popularization in various sulfuric acid production industries.
Description
Technical field
The production technique of the pharmaceutical chemicals that the present invention relates to, particularly relates to a kind of sulfuric acid production process.
Background technology
Sulfuric acid of many uses, as chemical fertilizer, explosive, agricultural chemicals and medicine etc. all need to use sulfuric acid, the sulfuric acid big country of China, sulphuric acid output and consumption sustainable growth, sulfuric acid apparatus has realized maximizing substantially, production domesticization, but China is not sulfate technology power at present, pyrite-based sulfuric acid production industrial afterheat recovery Exploitative potential is very large, can effective and feasible technology and equipment not all be had to reclaim this part energy in sulfuric acid production process now, application number is the production technique that CN200810232687.6 discloses a kind of sulfuric acid, it is with Iron concentrate (or iron mud), sulphur is main raw material, Iron concentrate (or iron mud) is mixed in appropriate ratio with sulphur, add appropriate sulfuric acid reaction again to requiring degree, then by roasting in mass transport to fluidizing furnace, roasting slag is through cooling, pulverize obtained red iron oxide product, furnace gas is through dedusting, and purification, twice transformation, double absorption makes vitriol oil product.This technique is using sulphur as thermal source, adopt fluidized bed roasting dry production red iron oxide product, there is the treated vitriol oil product having made market demand of flue gas of roasting, both environmental pollution was eliminated, take full advantage of Sulphur ressource again, turn harm into good, economic benefit, environmental benefit and social benefit remarkable, but its low temperature heat rate is extremely low, while being unfavorable for the utilization of resources, waste also very big, the control of most of sulfuric acid production process to temperature is indefinite simultaneously, cooling technology is not good, easily cause structure deteriorate, the work-ing life of minimizing equipment, increase process costs.
Summary of the invention
For the deficiency that prior art exists, the invention provides a kind of sulfuric acid production process.
For realizing object of the present invention, technical scheme of the present invention is as follows:
A kind of sulfuric acid production process, its processing step is as follows:
(1) pulverize and sieve: from ore, selecting sulfurous iron ore to pulverize, select 4 ~ 5mm sulfurous iron ore small-particle by screening;
(2) calcining process; Sent in fluidizing reactor by above-mentioned sulfurous iron ore small-particle, mixing air carries out calcination, and temperature controls at 850 DEG C-950 DEG C, and the furnace gas generated containing sulfurous gas is discharged from fluidizing reactor top, and slag is discharged through slag-drip opening;
(3) cleaning section; Furnace gas is cooled to about 350 DEG C in waste heat boiler, and at stove dirt in tornado dust collector removing furnace gas, enter purification system and lower the temperature with dedusting, remove the sulfuric acid mist in furnace gas and solid particles, expellant gas, temperature controls below 40 DEG C simultaneously;
(4) reaction heat reclaims: be provided with evaporation of vapours tube bank in waste heat boiler in step (3), furnace gas cools the reaction heat obtained, and is delivered to water circulation system or other therrmodynamic systems through evaporation of vapours tube bank.
(5) drying process; By the gas obtained in step (3), in drying tower, carry out drying with vitriol oil siccative, the heat simultaneously discharged is recycling after acid cooler absorbs;
(6) conversion procedure; The gas obtained in step (5) is entered conversion system through sulphur dioxide blower, under the katalysis of vanadium catalyst, is sulfur trioxide gas by the oxidizing sulfur dioxide in former furnace gas;
(7) operation is absorbed; By sulfur trioxide gas obtained above through intermediate absorber and final absorption tower, sulfuric acid can be obtained.
Above-mentioned a kind of sulfuric acid production process, wherein, in described step (7), described purification system is made up of Venturi meter, foam column and electrostatic precipitator.
Above-mentioned a kind of sulfuric acid production process, wherein, in described step (3), described purification system comprises Venturi meter, foam column and electrostatic precipitator.
Above-mentioned a kind of sulfuric acid production process, wherein, in described step (5), the concentration of described vitriol oil siccative is 92% ~ 94%.
Beneficial effect: the present invention passes through pulverizing and the screening of sulfurous iron ore, roasting, purification, reaction heat reclaims, dry, conversion and absorption seven large steps complete the preparation to sulfuric acid, in preparation process, calcining process and cleaning section clearly control equipment and gas temperature, purification system simultaneously selected by step (3), strong to the detergent power of acid mist, avoid the corrosion of acid mist to equipment, not only protect equipment but also extended and be provided with duration of service, by the conversion of energy in step (4), improve the recovery utilization rate of sulfuric acid acid industry middle-low temperature heat, the waste of the Energy resources avoided etc., acid circulation system is provided with in intermediate absorber and final absorption tower, the sulfur dioxide gas having little time to react is further oxidized to sulfur trioxide gas, improve the transformation efficiency of sulfurous gas, abundant to the utilization of sulphur in raw material, the discharge of decreasing pollution thing, purification system is by Venturi meter, foam column and electrostatic precipitator composition, fully can purify furnace gas, remove stove dirt, the pollutents such as acid mist, the concentration of vitriol oil siccative is 92% ~ 94%, dry water absorbing properties is best, drying efficiency is the highest, be conducive to the output improving sulfuric acid, be suitable for promoting in each gas washing in SA production industry.
Embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
embodiment 1:
A kind of sulfuric acid production process of the present embodiment, is characterized in that, its processing step is as follows:
(1) pulverize and sieve: from ore, selecting sulfurous iron ore to pulverize, select 4 ~ 5mm sulfurous iron ore small-particle by screening;
(2) calcining process; Sent in fluidizing reactor by above-mentioned sulfurous iron ore small-particle, mixing air carries out calcination, and temperature controls at 880 DEG C, and the furnace gas generated containing sulfurous gas is discharged from fluidizing reactor top, and slag is discharged through slag-drip opening;
(3) cleaning section; Furnace gas is cooled to about 350 DEG C in waste heat boiler, and at stove dirt in tornado dust collector removing furnace gas, enter purification system and lower the temperature with dedusting, remove the sulfuric acid mist in furnace gas and solid particles, expellant gas, temperature controls at 20 DEG C simultaneously;
(4) reaction heat reclaims: be provided with evaporation of vapours tube bank in waste heat boiler in step (3), furnace gas cools the reaction heat obtained, and is delivered to water circulation system or other therrmodynamic systems through evaporation of vapours tube bank.
(5) drying process; By the gas obtained in step (3), in drying tower, carry out drying with the vitriol oil siccative that concentration is 92%, the heat simultaneously discharged is recycling after acid cooler absorbs;
(6) conversion procedure; The gas obtained in step (5) is entered conversion system through sulphur dioxide blower, under the katalysis of vanadium catalyst, is sulfur trioxide gas by the oxidizing sulfur dioxide in former furnace gas;
(7) operation is absorbed; By sulfur trioxide gas obtained above through intermediate absorber and final absorption tower, sulfuric acid can be obtained.
embodiment 2: all the other are identical with described embodiment 1, and difference is, in step (2), fluidized bed roasting furnace temperature controls at 850 DEG C, in step (5), the concentration of vitriol oil siccative is 93%, in step (7), in described intermediate absorber and final absorption tower, be provided with acid circulation system.
embodiment 3:all the other are identical with described embodiment 1, difference is, in step (2), fluidized bed roasting furnace temperature controls at 950 DEG C, in step (3), described purification system is made up of Venturi meter, foam column and electrostatic precipitator, and in step (5), the concentration of vitriol oil siccative is 94%.
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Sulfurous iron ore utilization ratio | 57% | 54% | 60% |
| Sulphuric acid output accounts for the ratio of sulfurous gas | 95% | 98% | 94.5% |
By above-mentioned 3 embodiments, have three groups of data in upper table known, when temperature controls at 950 DEG C, the utilization ratio of sulfurous iron ore is the highest, and when the concentration of vitriol oil siccative is 93%, sulphuric acid output is best, is now more conducive to the production of sulfuric acid.
The present invention passes through pulverizing and the screening of sulfurous iron ore, roasting, purification, reaction heat reclaims, dry, conversion and absorption seven large steps complete the preparation to sulfuric acid, in preparation process, calcining process and cleaning section clearly control equipment and gas temperature, purification system simultaneously selected by step (3), strong to the detergent power of acid mist, avoid the corrosion of acid mist to equipment, not only protect equipment but also extended and be provided with duration of service, by the conversion of energy in step (4), improve the recovery utilization rate of sulfuric acid acid industry middle-low temperature heat, the waste of the Energy resources avoided etc., acid circulation system is provided with in intermediate absorber and final absorption tower, the sulfur dioxide gas having little time to react is further oxidized to sulfur trioxide gas, improve the transformation efficiency of sulfurous gas, abundant to the utilization of sulphur in raw material, the discharge of decreasing pollution thing, purification system is by Venturi meter, foam column and electrostatic precipitator composition, fully can purify furnace gas, remove stove dirt, the pollutents such as acid mist, the concentration of vitriol oil siccative is 92% ~ 94%, dry water absorbing properties is best, drying efficiency is the highest, be conducive to the output improving sulfuric acid, be suitable for promoting in each gas washing in SA production industry.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. a sulfuric acid production process, is characterized in that, its processing step is as follows:
(1) pulverize and sieve: from ore, selecting sulfurous iron ore to pulverize, select 4 ~ 5mm sulfurous iron ore small-particle by screening;
(2) calcining process; Sent in fluidizing reactor by above-mentioned sulfurous iron ore small-particle, mixing air carries out calcination, and temperature controls at 850 DEG C-950 DEG C, and the furnace gas generated containing sulfurous gas is discharged from fluidizing reactor top, and slag is discharged through slag-drip opening;
(3) cleaning section; Furnace gas is cooled to about 350 DEG C in waste heat boiler, and at stove dirt in tornado dust collector removing furnace gas, enter purification system and lower the temperature with dedusting, remove the sulfuric acid mist in furnace gas and solid particles, expellant gas, temperature controls below 40 DEG C simultaneously;
(4) reaction heat reclaims: be provided with evaporation of vapours tube bank in waste heat boiler in step (3), furnace gas cools the reaction heat obtained, and is delivered to water circulation system or other therrmodynamic systems through evaporation of vapours tube bank;
(5) drying process; By the gas obtained in step (3), in drying tower, carry out drying with vitriol oil siccative, the heat simultaneously discharged is recycling after acid cooler absorbs;
(6) conversion procedure; The gas obtained in step (5) is entered conversion system through sulphur dioxide blower, under the katalysis of vanadium catalyst, is sulfur trioxide gas by the oxidizing sulfur dioxide in former furnace gas;
(7) operation is absorbed; By sulfur trioxide gas obtained above through intermediate absorber and final absorption tower, sulfuric acid can be obtained.
2. a kind of sulfuric acid production process according to claim 1, is characterized in that, in described step (7), described purification system is made up of Venturi meter, foam column and electrostatic precipitator.
3. a kind of sulfuric acid production process according to claim 1, is characterized in that, in described step (3), described purification system comprises Venturi meter, foam column and electrostatic precipitator.
4. a kind of sulfuric acid production process according to claim 1, is characterized in that, in described step (5), the concentration of described vitriol oil siccative is 92% ~ 94%.
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| CN201310435617.1A CN104445094A (en) | 2013-09-24 | 2013-09-24 | Sulfuric acid production process |
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| CN201310435617.1A CN104445094A (en) | 2013-09-24 | 2013-09-24 | Sulfuric acid production process |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104291276A (en) * | 2014-09-19 | 2015-01-21 | 中山市鸿程科研技术服务有限公司 | Production technology of sulphuric acid |
| CN105439103A (en) * | 2015-11-29 | 2016-03-30 | 惠州卫生职业技术学院 | Preparation process of sulfuric acid |
| CN106430116A (en) * | 2016-08-24 | 2017-02-22 | 金能科技股份有限公司 | Method for preparing sulfuric acid by utilizing sulfur-containing waste liquid generated during gas wet type oxidation process |
| CN106512980A (en) * | 2016-08-31 | 2017-03-22 | 上海奥威日化有限公司 | Catalyst for producing sulfur trioxide from sulfur dioxide |
| CN107754596A (en) * | 2016-08-19 | 2018-03-06 | 张丽媛 | Roaster calcining discharge system gathers dust the recycling technique of sulfur dioxide in gas |
| CN109734630A (en) * | 2018-09-21 | 2019-05-10 | 中国日用化学研究院有限公司 | A method of sulfonate surfactant or Sulfates surfactant are produced by sulfonation initiator of troilite |
| CN110527822A (en) * | 2019-07-31 | 2019-12-03 | 武汉科技大学 | A kind of metallurgy refining waste residue desulfuration processing method |
| CN111547686A (en) * | 2020-05-14 | 2020-08-18 | 何爽 | Refined acid production method and production system |
| CN113800479A (en) * | 2021-10-29 | 2021-12-17 | 山东京博众诚清洁能源有限公司 | Process for preparing electronic-grade sulfuric acid by cyclic absorption method |
| CN114014294A (en) * | 2021-12-08 | 2022-02-08 | 高点(深圳)科技有限公司 | Method for preparing lithium iron phosphate by using pyrite and lithium iron phosphate material |
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| US4333917A (en) * | 1979-02-10 | 1982-06-08 | Metallgesellschaft Aktiengesellschaft | Process of producing sulfuric acid |
| CN102070128A (en) * | 2010-11-07 | 2011-05-25 | 湖南新恒光科技有限公司 | Process for efficiently recovering afterheat generated in the process of producing sulfuric acid from pyritic |
| CN102367169A (en) * | 2011-05-23 | 2012-03-07 | 中国石油化工集团公司 | Method for preparation of sulfuric acid and combined production of fine flour iron through calcination of coal-derived pyrite in presence of oxygen-rich air |
| CN103303878A (en) * | 2013-05-30 | 2013-09-18 | 福建省邵武市永飞化工有限公司 | Method for preparing sulfuric acid by iron pyrite |
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2013
- 2013-09-24 CN CN201310435617.1A patent/CN104445094A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4333917A (en) * | 1979-02-10 | 1982-06-08 | Metallgesellschaft Aktiengesellschaft | Process of producing sulfuric acid |
| CN102070128A (en) * | 2010-11-07 | 2011-05-25 | 湖南新恒光科技有限公司 | Process for efficiently recovering afterheat generated in the process of producing sulfuric acid from pyritic |
| CN102367169A (en) * | 2011-05-23 | 2012-03-07 | 中国石油化工集团公司 | Method for preparation of sulfuric acid and combined production of fine flour iron through calcination of coal-derived pyrite in presence of oxygen-rich air |
| CN103303878A (en) * | 2013-05-30 | 2013-09-18 | 福建省邵武市永飞化工有限公司 | Method for preparing sulfuric acid by iron pyrite |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104291276A (en) * | 2014-09-19 | 2015-01-21 | 中山市鸿程科研技术服务有限公司 | Production technology of sulphuric acid |
| CN105439103A (en) * | 2015-11-29 | 2016-03-30 | 惠州卫生职业技术学院 | Preparation process of sulfuric acid |
| CN105439103B (en) * | 2015-11-29 | 2018-08-10 | 惠州卫生职业技术学院 | A kind of sulfuric acid preparation process |
| CN107754596A (en) * | 2016-08-19 | 2018-03-06 | 张丽媛 | Roaster calcining discharge system gathers dust the recycling technique of sulfur dioxide in gas |
| CN106430116A (en) * | 2016-08-24 | 2017-02-22 | 金能科技股份有限公司 | Method for preparing sulfuric acid by utilizing sulfur-containing waste liquid generated during gas wet type oxidation process |
| CN106430116B (en) * | 2016-08-24 | 2019-01-04 | 金能科技股份有限公司 | A method of the sulphur-bearing waste solution extracting sulfuric acid generated using coal gas wet oxidation method |
| CN106512980B (en) * | 2016-08-31 | 2018-11-13 | 上海奥威日化有限公司 | The catalyst of sulfur trioxide is produced by oxidizing sulfur dioxide |
| CN106512980A (en) * | 2016-08-31 | 2017-03-22 | 上海奥威日化有限公司 | Catalyst for producing sulfur trioxide from sulfur dioxide |
| CN109734630A (en) * | 2018-09-21 | 2019-05-10 | 中国日用化学研究院有限公司 | A method of sulfonate surfactant or Sulfates surfactant are produced by sulfonation initiator of troilite |
| CN109734630B (en) * | 2018-09-21 | 2021-07-20 | 中国日用化学研究院有限公司 | Method for producing sulfonate surfactant or sulfate surfactant by using pyrite as sulfonation initiator |
| CN110527822A (en) * | 2019-07-31 | 2019-12-03 | 武汉科技大学 | A kind of metallurgy refining waste residue desulfuration processing method |
| CN111547686A (en) * | 2020-05-14 | 2020-08-18 | 何爽 | Refined acid production method and production system |
| CN113800479A (en) * | 2021-10-29 | 2021-12-17 | 山东京博众诚清洁能源有限公司 | Process for preparing electronic-grade sulfuric acid by cyclic absorption method |
| CN114014294A (en) * | 2021-12-08 | 2022-02-08 | 高点(深圳)科技有限公司 | Method for preparing lithium iron phosphate by using pyrite and lithium iron phosphate material |
| CN114014294B (en) * | 2021-12-08 | 2023-08-22 | 高点(深圳)科技有限公司 | Method for preparing lithium iron phosphate by using pyrite and lithium iron phosphate material |
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Application publication date: 20150325 |