CN101972596A - Method for preparing sodium sulfite and elementary sulfur from sulfur dioxide waste gas - Google Patents
Method for preparing sodium sulfite and elementary sulfur from sulfur dioxide waste gas Download PDFInfo
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- CN101972596A CN101972596A CN2010105191825A CN201010519182A CN101972596A CN 101972596 A CN101972596 A CN 101972596A CN 2010105191825 A CN2010105191825 A CN 2010105191825A CN 201010519182 A CN201010519182 A CN 201010519182A CN 101972596 A CN101972596 A CN 101972596A
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- sodium sulfite
- sulfur
- sulfur dioxide
- elemental sulfur
- lead
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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
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
The invention provides a method for preparing sodium sulfite and elementary sulfur from sulfur dioxide waste gas, which comprises the following steps of: mixing waste residue in lithopone production and white coal, and reacting in an electric arc furnace at a high temperature to obtain elementary lead and sulfur dioxide gas; reacting the sulfur dioxide gas with sodium sulfide to obtain sodium sulfite and elementary sulfur-containing reaction liquid; performing suction filtering to obtain clear solution and an elementary sulfur-containing filter cake; washing, drying and crushing the elementary sulfur-containing filter cake to obtain an elementary sulfur product; and feeding the clear solution into an evaporator for evaporation until saturated solution of sodium sulfite is formed, and cooling to obtain a sodium sulfite product. By the method, waste is recycled, the waste residue in the lithopone production is effectively converted into sulfuric acid and hydrogen bromide with great economic significance, potential economic value is fully excavated and utilized, and a new way is also provided for the comprehensive utilization and treatment of the waste residue in the lithopone production.
Description
Technical field
The present invention relates to the comprehensive regulation of form waste gas of sulfur dioxide and utilize technical field, particularly a kind of method for preparing sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide.
Background technology
Lithopone is commonly called as lithopone, is the mixture of zinc sulphide and barium sulfate, adopts roasting leaching method to produce usually.Be about to barium sulfate-containing greater than 95% natural barite and anthracite with 3: 1 (quality) mixed material feedings, below being crushed to the about 2cm of diameter, enter reduction furnace, control furnace temperature leading portion is 1000～1200 ℃, back segment is 500～600 ℃, reduction furnace rotates with the speed of revolution 80s, reaction conversion ratio is 80%～90%, the barium sulphide that makes enters infuser, the control temperature is more than 65 ℃, and obtaining barium sulphide content is 701%, enters settling tank again, the clarification back adds the zinc sulfate reaction, control zinc sulfate content greater than 28%, pH=8～9, obtaining density is the barium sulfate of 1.296～1.357g/cm3 and the mixture of zinc sulphide.Reactant liquor obtains filter cake shape lithopone through plate compression, and water content is not more than 45%, enters the roasting of drying and roasting stove to change the lithopone crystal formation, uses sulfuric acid washing then under 80 ℃ of temperature.After washing, add color-fixing agent, press filtration, drying and abrasive dust and form.Reaction equation wherein is as follows:
2C+O
2→2CO
2
BaSO
4+C→BaS+4CO
BaSO
4+4CO→BaS+4CO
2
BaS+ZnSO
4→ZnS·BaSO
4
Produced the various heavy waste residue in the process of above-mentioned lithopone production, as solid waste such as lead skim, cadmia, cadmium slag, barium slag, cinders.Wherein, plumbous and zinc content is the highest, lead element content is 25-38%, and the zinc constituent content is 8-10%, and elements such as other sulphur, barium, calcium, cadmium, copper add together content for being no more than 10%.At present, resource is so not only wasted in the most air storage of this waste residue or be used to fill a vacancy, pave the way, and heavy metal is serious environment pollution also.People have carried out a large amount of research for this reason, study producing multiple product in 1973 01 phases " fine-chemical intermediate " with the lithopone waste residue, " Hunan chemical industry " 1992 the 22nd the 1st phase of volume has also been reported " research of producing lead sulfate from lithopone acidleach waste residue ", but all also just be in theoretical research in the literary composition, also actual without comparison processing and utilize method.
For this reason, be necessary to explore the comprehensive regulation and utilize the form waste gas of sulfur dioxide commercial run, produce of the pollution of lithopone gained waste residue environment to alleviate.
The applicant put into practice for many years basic on, in conjunction with the actual conditions of producing the lithopone waste residue, developed and administered and utilized the method for producing lithopone gained waste residue, yet, in this process, produced a large amount of sulfur dioxide gas.As everyone knows, sulfur dioxide (SO
2) be modal oxysulfide, the intense stimulus smell is arranged, be one of atmosphere major pollutants.Soluble in water when sulfur dioxide, can form sulfurous acid (main component of acid rain).If SO
2Further oxidation is usually in the presence of catalyst such as nitrogen dioxide, just can generate sulfuric acid.Thereby further contaminated environment.
Summary of the invention
The objective of the invention is to, a kind of method for preparing sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide is provided.This method turns waste into wealth, effectively form waste gas of sulfur dioxide is converted into sodium sulfite and the elemental sulfur that has than the large economy meaning, fully excavate and utilized potential economic worth, simultaneously, also solved the problem of environmental pollution that comprehensive utilization and improvement produced of producing lithopone gained waste residue, for comprehensive utilization and the improvement of lithopone gained waste residue provides the environment assurance.
Technical scheme of the present invention is as follows: a kind ofly prepare the method for sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide, comprise following concrete steps:
Steps A: is 1 with sulfur dioxide gas according to the pure material mass ratio of sulfur dioxide and vulcanized sodium: 0.61-1.01 feeds enamel reactor (2) lining that fills sodium sulfide solution, slowly start agitator and make it carry out chemical reaction, obtain containing the reactant liquor of sodium sulfite and elemental sulfur;
Step B: the reactant liquor that contains sodium sulfite and elemental sulfur of steps A gained through suction filtration machine (3) suction filtration, is obtained clear solutions and contains the filter cake of elemental sulfur;
Step C: elemental sulfur product (6) is pulverized, is packaged to be to the filter cake that contains elemental sulfur of step B gained through rinsing maching (4) washing drying, pulverizer (5);
Step D: the clear solutions of step B gained is sent into the evaporation of evaporimeter (7) lining, and when making it to reach the sodium sulfite saturated solution, cooling obtains the sodium sulfite crystal, is sodium sulfite product (8).
Described form waste gas of sulfur dioxide derives from produces lithopone gained waste residue, its detailed process is: the lead sulfate mass content in the lithopone gained waste residue is produced in conversion, and according to lead sulfate, the pure material mass ratio that iron is cut with anthracite is 1: 0.08-0.38: 0.02-0.06 weighing iron is cut and anthracite, after each material mixed, send in the electric arc furnaces of airtight secluding air from electric arc furnaces (1) top, being heated to 1200-1300 ℃ reacts, lead in the waste residue is separated with zinc oxide, lead flows out in stove with molten condition, be cast into lead pig crude product product, obtain the elaboration metallic lead, overflow simultaneously sulfur dioxide and carbon dioxide through melting again to make with extra care; Sulfur dioxide gas and carbon dioxide are absorbed through the purifying carbon dioxide device, remove carbon dioxide, promptly get comparatively pure sulfur dioxide gas.
Of the present inventionly prepare the method for sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide, its chemical equation is:
3SO
2+2Na
2S＝＝＝＝2Na
2SO
3+3S
PbSO
4+Fe＝＝＝＝＝Pb+FeSO
4
PbSO
4+C＝＝＝＝＝Pb+CO
2+SO
2
The invention has the beneficial effects as follows: the present invention prepares the method for sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide, effectively form waste gas of sulfur dioxide is converted into sodium sulfite and the elemental sulfur that has than the large economy meaning, fully excavates and utilized potential economic worth.When form waste gas of sulfur dioxide derives from when producing lithopone gained waste residue, also solved the problem of environmental pollution that comprehensive utilization and improvement produced of producing lithopone gained waste residue, for the comprehensive utilization and the improvement of lithopone gained waste residue provides the environment assurance.This method is simple to operate, and the equipment investment expense is low, and accessory substance is few, is suitable for applying.
Description of drawings
Fig. 1 prepares the process chart of the method for sodium sulfite and elemental sulfur for of the present invention with form waste gas of sulfur dioxide, among this figure, and (1) electric arc furnaces, (2) enamel reactor, (3) suction filtration machine, (4) rinsing maching, (5) pulverizer, (6) elemental sulfur product, (7) evaporimeter, (8) sodium sulfite product.
The specific embodiment
Embodiment 1
With reference to Fig. 1, a kind of method for preparing sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide, the sulfur dioxide gas that will contain 192kg sulfur dioxide is to feed enamel reactor (2) lining that fills sodium sulfide solution at 1: 0.81 according to the pure material mass ratio of sulfur dioxide and vulcanized sodium, slowly start agitator and make it carry out chemical reaction, obtain containing the reactant liquor of sodium sulfite and elemental sulfur; The reactant liquor that will contain sodium sulfite and elemental sulfur obtains clear solutions and the filter cake that contains elemental sulfur through suction filtration machine (3) suction filtration; Elemental sulfur product (6) is pulverized, is packaged to be to the filter cake that will contain elemental sulfur through rinsing maching (4) washing drying, pulverizer (5), and wherein the pure material quality of elemental sulfur is 96kg; Clear solutions is sent into the evaporation of evaporimeter (7) lining, and when making it to reach the sodium sulfite saturated solution, cooling obtains the sodium sulfite crystal, is sodium sulfite product (8), and wherein the pure material quality of sodium sulfite is 252kg.
Above-mentioned sulfur dioxide derives from produces lithopone gained waste residue, its detailed process is: the lead sulfate mass content in the lithopone gained waste residue is produced in conversion, the lithopone of weighing sulfur-bearing lead plumbate 606kg, and according to lead sulfate, the pure material mass ratio that iron is cut with anthracite is 1: 0.38: 0.0.06 weighing iron is cut and anthracite, after each material mixed, send in the electric arc furnaces of airtight secluding air from electric arc furnaces (1) top, being heated to 1200-1300 ℃ reacts, lead in the waste residue is separated with zinc oxide, lead flows out in stove with molten condition, be cast into lead pig crude product product, obtain the elaboration metallic lead, overflow simultaneously sulfur dioxide and carbon dioxide through melting again to make with extra care; Sulfur dioxide gas and carbon dioxide are absorbed through the purifying carbon dioxide device, remove carbon dioxide, promptly get comparatively pure sulfur dioxide gas 32kg.Duplication of production six times must be with the 192kg sulfur dioxide gas.
Embodiment 2
With reference to Fig. 1, a kind of method for preparing sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide, is to feed enamel reactor (2) lining that fills the 117.12kg sodium sulfide solution at 1: 0.61 with the sulfur dioxide gas of capacity according to the pure material mass ratio of sulfur dioxide and vulcanized sodium, slowly start agitator and make it carry out chemical reaction, obtain containing the reactant liquor of sodium sulfite and elemental sulfur; The reactant liquor that will contain sodium sulfite and elemental sulfur obtains clear solutions and the filter cake that contains elemental sulfur through suction filtration machine (3) suction filtration; Elemental sulfur product (6) is pulverized, is packaged to be to the filter cake that will contain elemental sulfur through rinsing maching (4) washing drying, pulverizer (5), and wherein, the pure material quality of elemental sulfur is 72.12kg; Clear solutions is sent into the evaporation of evaporimeter (7) lining, and when making it to reach the sodium sulfite saturated solution, cooling obtains the sodium sulfite crystal, is sodium sulfite product (8), and wherein the pure material quality of sodium sulfite is 189.19kg.
The source of described form waste gas of sulfur dioxide is as follows: the lead sulfate mass content in the lithopone gained waste residue is produced in conversion, the lithopone of weighing sulfur-bearing lead plumbate 606kg, and weighing iron is cut and anthracite, according to lead sulfate, the pure material mass ratio that iron is cut with anthracite is 1: 0.38: 0.06, after each material mixed, send in the electric arc furnaces of airtight secluding air from electric arc furnaces (1) top, being heated to 1200-1300 degree centigrade reacts, lead in the waste residue is separated with zinc oxide, lead flows out in stove with happy and harmonious state, be cast into lead pig crude product product, obtain the elaboration metallic lead, overflow simultaneously sulfur dioxide gas and carbon dioxide through melting again to make with extra care; Sulfur dioxide gas and carbon dioxide absorb through the purifying carbon dioxide device, obtain sulfur dioxide gas 32kg.Duplication of production repeatedly obtains the sulfur dioxide gas of capacity.
Embodiment 3
With reference to Fig. 1, a kind of method for preparing sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide, is to feed enamel reactor (2) lining that fills the 193.92kg sodium sulfide solution at 1: 1.01 with the 192kg sulfur dioxide gas according to the pure material mass ratio of sulfur dioxide and vulcanized sodium, slowly start agitator and make it carry out chemical reaction, obtain containing the reactant liquor of sodium sulfite and elemental sulfur; The reactant liquor that will contain sodium sulfite and elemental sulfur obtains clear solutions and the filter cake that contains elemental sulfur through suction filtration machine (3) suction filtration; Elemental sulfur product (6) is pulverized, is packaged to be to the filter cake that will contain elemental sulfur through rinsing maching (4) washing drying, pulverizer (5), and wherein the pure material quality of elemental sulfur is 96kg; Clear solutions is sent into the evaporation of evaporimeter (7) lining, and when making it to reach the sodium sulfite saturated solution, cooling obtains the sodium sulfite crystal, is sodium sulfite product (8), and wherein the pure material quality of sodium sulfite is 252kg.
Above-mentioned sulfur dioxide derives from produces lithopone gained waste residue, its detailed process is: the lead sulfate mass content in the lithopone gained waste residue is produced in conversion, the lithopone of weighing sulfur-bearing lead plumbate 909kg, and weighing iron is cut and anthracite, according to lead sulfate, the pure material mass ratio that iron is cut with anthracite is 1: 0.08: 0.02, after each material mixed, send in the electric arc furnaces of airtight secluding air from electric arc furnaces (1) top, being heated to 1200-1300 degree centigrade reacts, lead in the waste residue is separated with zinc oxide, lead flows out in stove with happy and harmonious state, be cast into lead pig crude product product, obtain the elaboration metallic lead, overflow simultaneously sulfur dioxide gas and carbon dioxide through melting again to make with extra care; Sulfur dioxide gas and carbon dioxide absorb through the purifying carbon dioxide device, obtain sulfur dioxide gas 48.48kg, and duplication of production repeatedly obtains the sulfur dioxide gas of capacity.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can the subseries method.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (2)
1. one kind prepares the method for sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide, it is characterized in that, comprises following concrete steps:
Steps A: is 1 with sulfur dioxide gas according to the pure material mass ratio of sulfur dioxide and vulcanized sodium: 0.61-1.01 feeds enamel reactor (2) lining that fills sodium sulfide solution, slowly start agitator and make it carry out chemical reaction, obtain containing the reactant liquor of sodium sulfite and elemental sulfur;
Step B: the reactant liquor that contains sodium sulfite and elemental sulfur of steps A gained through suction filtration machine (3) suction filtration, is obtained clear solutions and contains the filter cake of elemental sulfur;
Step C: elemental sulfur product (6) is pulverized, is packaged to be to the filter cake that contains elemental sulfur of step B gained through rinsing maching (4) washing drying, pulverizer (5);
Step D: the clear solutions of step B gained is sent into the evaporation of evaporimeter (7) lining, and when making it to reach the sodium sulfite saturated solution, cooling obtains the sodium sulfite crystal, is sodium sulfite product (8).
2. the method for preparing sodium sulfite and elemental sulfur with form waste gas of sulfur dioxide as claimed in claim 1, it is characterized in that, described form waste gas of sulfur dioxide derives from produces lithopone gained waste residue, its detailed process is: the lead sulfate mass content in the lithopone gained waste residue is produced in conversion, and according to lead sulfate, the pure material mass ratio that iron is cut with anthracite is 1: 0.08-0.38: 0.02-0.06 weighing iron is cut and anthracite, after each material mixed, send in the electric arc furnaces of airtight secluding air from electric arc furnaces (1) top, being heated to 1200-1300 ℃ reacts, lead in the waste residue is separated with zinc oxide, lead flows out in stove with molten condition, be cast into lead pig crude product product, obtain the elaboration metallic lead, overflow simultaneously sulfur dioxide and carbon dioxide through melting again to make with extra care; Sulfur dioxide gas and carbon dioxide are absorbed through the purifying carbon dioxide device, remove carbon dioxide, promptly get comparatively pure sulfur dioxide gas.
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|---|---|---|---|
| CN2010105191825A CN101972596A (en) | 2010-10-25 | 2010-10-25 | Method for preparing sodium sulfite and elementary sulfur from sulfur dioxide waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105191825A CN101972596A (en) | 2010-10-25 | 2010-10-25 | Method for preparing sodium sulfite and elementary sulfur from sulfur dioxide waste gas |
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|---|---|
| CN101972596A true CN101972596A (en) | 2011-02-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570046A (en) * | 2013-11-14 | 2014-02-12 | 湖南恒光化工有限公司 | Process for preparing high-purity sodium sulfite through sulfuric acid production industrial exhaust |
| CN107758697A (en) * | 2017-11-20 | 2018-03-06 | 宣城市楷昂化工有限公司 | A kind of production method of industrial anhydrous sodium sulfite |
| CN110783553A (en) * | 2019-11-26 | 2020-02-11 | 长虹格兰博科技股份有限公司 | Lithium ion battery anode material and preparation method thereof |
| CN111592473A (en) * | 2020-05-13 | 2020-08-28 | 湖北远大生命科学与技术有限责任公司 | Method and system for circularly preparing taurine |
-
2010
- 2010-10-25 CN CN2010105191825A patent/CN101972596A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570046A (en) * | 2013-11-14 | 2014-02-12 | 湖南恒光化工有限公司 | Process for preparing high-purity sodium sulfite through sulfuric acid production industrial exhaust |
| CN103570046B (en) * | 2013-11-14 | 2015-07-01 | 湖南恒光化工有限公司 | Process for preparing high-purity sodium sulfite through sulfuric acid production industrial exhaust |
| CN107758697A (en) * | 2017-11-20 | 2018-03-06 | 宣城市楷昂化工有限公司 | A kind of production method of industrial anhydrous sodium sulfite |
| CN110783553A (en) * | 2019-11-26 | 2020-02-11 | 长虹格兰博科技股份有限公司 | Lithium ion battery anode material and preparation method thereof |
| CN111592473A (en) * | 2020-05-13 | 2020-08-28 | 湖北远大生命科学与技术有限责任公司 | Method and system for circularly preparing taurine |
| CN111592473B (en) * | 2020-05-13 | 2023-01-17 | 湖北远大生命科学与技术有限责任公司 | Method and system for circularly preparing taurine |
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Open date: 20110216 |