CN102530997A - Desulfurization product recycling technology and system - Google Patents
Desulfurization product recycling technology and system Download PDFInfo
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- CN102530997A CN102530997A CN2012100470046A CN201210047004A CN102530997A CN 102530997 A CN102530997 A CN 102530997A CN 2012100470046 A CN2012100470046 A CN 2012100470046A CN 201210047004 A CN201210047004 A CN 201210047004A CN 102530997 A CN102530997 A CN 102530997A
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Abstract
The invention relates to a desulfurization product recycling technology which is used for recycling the semi-dry desulfurization product and comprises the following steps of: collecting the desulfurization waste residue, and dissolving and oxidizing the waste residue to generate a sodium sulfate solution; clarifying the generated sodium sulfate solution, wherein the clarified sodium sulfate solution is separated into mud and clear liquid; filtering the clear liquid, and evaporating and crystallizing the filtrate to obtain sodium sulfate crystal mush; separating the sodium sulfate crystal mush according to the thickness; and drying the separated solid and recycling. The invention also relates to a desulfurization product recycling system. In the desulfurization product recycling technology and system, the desulfurization waste residue is dissolved and oxidized to generate a sodium sulfate solution which is then clarified, evaporated and crystallized, separated and dried to recycle sodium sulfate, and the desulfurization waste residue needing to be buried is turned into the finished product mirabilite, thereby realizing an effect of turning waste into wealth. Moreover, the secondary environmental pollution caused by burying in the prior art can be avoided, and thus the environmental pollution caused by the desulfurization waste residue can be reduced.
Description
Technical field
The invention belongs to glass and make the field, be specifically related to a kind of desulfurization product and reclaim technology and system.
Background technology
In glass is fired, usually will be to the glass furnace fume desulfurization, for example, adopt and receive alkali (Na
2CO
3Or NaOH) spraying drying+bag-type dust semidry process is because of its desulfuration efficiency height; Stable, simple to operate, maintenance is little; Receive the industry favor.But the soda that this arts demand consumption is a large amount of, reagent cost is high, and along with the rise at full speed of alkali price, desulphurization cost is got promotion continuously in recent years, becomes the bottleneck problem of this sulfur removal technology development of restriction, and how reducing desulphurization cost is a problem of putting in the industry cycle.
The semi-dry desulphurization product mainly is Na
2SO
3With a spot of flue dust, generally handle directly landfill of back at present through press filtration, cause secondary environmental pollution easily.
Summary of the invention
In view of this, the desulfurization product of a kind of energy-conserving and environment-protective are provided, turning waste into wealth reclaims technology, and the desulfurization product recovery system of implementing this technology.
A kind of desulfurization product reclaims technology, is used to reclaim the semi-dry desulphurization product, and said technology comprises the following steps:
Collect desuifurizedly, make waste residue dissolving and oxidation, generate metabisulfite solution;
Metabisulfite solution after generating is clarified, and clarification back metabisulfite solution separates into mud and clear liquor;
Filtering clarifying liquid again with the filtrate filtered evaporative crystallization, gets the sodium sulfate magma;
The sodium sulfate magma is carried out stiff separate, reclaim behind the dry isolated solid.
And a kind of desulfurization product recovery system is used to realize that aforesaid desulfurization product reclaims technology, and said system comprises dissolved oxygen pond, clarifying tank, strainer, evaporation unit, stiff device, whizzer and drying machine; Said dissolved oxygen pond is used for material dissolution and oxidation, generates metabisulfite solution, and raw material is desuifurized for what collect; Said clarifying tank is communicated with said dissolved oxygen pond and receives the metabisulfite solution that generates from said dissolved oxygen pond, is used for the metabisulfite solution after generating is clarified, and makes metabisulfite solution separate into mud and clear liquor; Said strainer is communicated with said clarifying tank and receives from the isolated clear liquor of said clarifying tank; Be used for filtering clarifying liquid, the filtrating that leaches is delivered in the evaporation unit, and said evaporation unit is communicated with strainer; Be used for the filtrate filtered evaporative crystallization is obtained the sodium sulfate magma; Said stiff device is communicated with said evaporation unit; Being used for that the sodium sulfate magma is carried out stiff handles; Said whizzer is communicated with said stiff device; Be used for that the magma after the stiff processing is carried out solid-liquid separation and separate, said drying machine is used for dry isolated solid, to reclaim dried solid product.
Above-mentioned desulfurization product reclaims technology and system, with desuifurized dissolving and oxidation, generates metabisulfite solution; And then clarification, evaporative crystallization separates; Drying gets final product reclaim(ed) sulfuric acid sodium, thereby will need the desuifurized finished product saltcake that becomes of landfill; Reach the effect of " turning waste into wealth ", the benefit of generation can remedy desulphurization cost.In addition, the secondary environmental pollution that landfill caused in the prior art can be avoided, thereby desuifurized pollution can be reduced environment.
Description of drawings
Fig. 1 is that the desulfurization product of the embodiment of the invention reclaims process flow diagram.
Fig. 2 is the structural representation of the desulfurization product recovery system of the embodiment of the invention.
Fig. 3 illustrates the equipment of evaporation flow process of the desulfurization product recovery system of Fig. 2.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, the desulfurization product of the embodiment of the invention reclaims technology, is used to reclaim the semi-dry desulphurization product, specifically comprises the following steps:
S10: collect desuifurizedly, make waste residue dissolving and oxidation, generate metabisulfite solution;
S20: the metabisulfite solution after will generating is clarified, and clarification back metabisulfite solution separates into mud and clear liquor;
S30: filtering clarifying liquid again with the filtrate filtered evaporative crystallization, gets the sodium sulfate magma;
S40: the sodium sulfate magma is carried out stiff separate, reclaim behind the dry isolated solid.
Below in conjunction with the above-mentioned technology of process description shown in Figure 1; Wherein, Step S01 specifically comprises following process: that will collect is desuifurized through air conveying in lysate, in lysate, blasts air, makes the S-WAT in desuifurized fully be oxidized to sodium sulfate.Desuifurized S-WAT and the insoluble flue dust of part of mainly comprising, form is Powdered, particle diameter is fit to air conveying generally below 110 microns.Desuifurized to utilize pipeline to pass through air conveying, adds the dissolving tank that lysate is housed, and blasts air simultaneously, and accelerate dissolution makes the abundant oxidation of S-WAT produce sodium sulfate on the other hand on the one hand.During dissolving, be preferably sodium sulfate is reached capacity, and then saturated sodium sulfate is got into the back make clarifying treatment.In the present embodiment, the concentration of metabisulfite solution is about 25%.The reaction that in this step, takes place is:
2Na
2SO
3+O
2=?2Na
2SO
4。
In step S20, as shown in the figure, be to quicken clarification, further when clarification, add flocculation agent, for example TXY or PAM etc., TXY is a high molecular weight sodium polyacrylate, PAM is a SEPIGEL 305, is high molecular weight water soluble polymer.Also can add other auxiliary agents in addition, like the causticization wheat bran.Clarification back metabisulfite solution separates into mud and clear liquor, the further press filtration of mud, and promptly step S22 among the figure collects the dried mud that press filtration goes out, and the cleaner liquid that press filtration goes out turns back to step S10, repeats front dissolving and oxidation and two steps of clarification.The dried mud that press filtration goes out is collected landfill, and this amount of landfill seldom.
Step S30 was divided into for two steps, at first filters, and step S31 in promptly scheming, the clear liquor after the clarification filters through strainer, according to the size of amount, can select sand-bed filter or automatic backwash continuous filter.Then, with the filtrate filtered evaporative crystallization, step S32 in promptly scheming.Evaporative crystallization can be selected forced circulation evaporation device or falling film evaporation device for use, according to the size of scale, generally selects two effects, triple effect or quadruple effect evaporation technology.In view of the contrary dissolution characteristics of sodium sulfate, that is, general inorganic salt compound all is the rising with temperature, and solubleness raises, like ammonium chloride; And sodium sulfate behind 32.4 ° of C with the rising of temperature, solubleness descends on the contrary, therefore, during evaporative crystallization, can select advection or adverse current feeding technology for use, salt discharge is preferably the advection salt discharge.Because the contrary dissolution characteristics of sodium sulfate does not suit to use crystallisation by cooling technology, preferably, feed liquid arrives supersaturation through evaporation concentration, produces the nucleus crystal growth.Evaporate used steam from the low taste of waste heat boiler 0.1 ~ 0.4Mpa saturation steam.The water of condensation specific conductivity that evaporation produces can be used as the boiler replenishing water recycle when low, can be used for circulating cooling make-up water or in line when specific conductivity exceeds standard.Evaporative crystallization obtains the sodium sulfate magma at last, and metabisulfite solution is in evaporative process, and the magma solid-to-liquid ratio (volume ratio) of imitating in the body preferably is controlled at 20% ~ 25% scope.
In step S40, because the magma solid-liquid volume ratio after the evaporation is 20% ~ 25%, also must carries out stiff before the entering spinning and handle through the stiff device, promptly step S41 is 40% ~ 60% to improve the solid-liquid volume ratio, carries out spinning again, i.e. step S42.Small scale select dull and stereotyped whizzer for use, scale can be selected the continuous pusher centrifuge of piston-type greatly for use.But the centrifugal clear liquid loopback evaporation unit that throws away continues evaporation concentration.
Moisture 4% ~ the 8wt% of solid sodium sulfate after the spinning also will carry out drying treatment, i.e. step S43 among the figure; Particularly, the moisture of solid sodium sulfate is dropped to below the 1wt%, can obtain thenardite; Return the raw material workshop, use, reach the effect that turns waste into wealth as the glass production finings.
See also Fig. 2, the desulfurization product recovery system 100 of the embodiment of the invention is shown, be used to realize that aforesaid desulfurization product reclaims technology.This system 10 comprises dissolved oxygen pond 11, clarifying tank 12, strainer 13, evaporation unit 14, stiff device 15, whizzer 16 and drying machine 17.
Particularly, dissolved oxygen pond 11 is used for material dissolution and oxidation, generates metabisulfite solution, and raw material is desuifurized for what collect.As previously mentioned, the raw material in dissolved oxygen pond 11 through air conveying, can be continuously feeding with pipeline, makes that reclaiming technology becomes a successive production technique.Simultaneously, in dissolved oxygen pond 11, blast air, for example through in dissolved oxygen pond 11, being immersed in a bubbling device (figure does not show) is set in the lysate, the outside connects a gas blower (figure does not show).
Clarifying tank 12 is communicated with dissolved oxygen pond 11 and receives the metabisulfite solution that generates from dissolved oxygen pond 11, is used for the metabisulfite solution after generating is clarified, and makes metabisulfite solution separate into mud and clear liquor.With the metabisulfite solution after the dissolving, concentration about 25% is clarified through clarifying tank, preferred way clarifying tank or Regensburg fourth clarifying tank.In order to quicken clarification, further in clarifying tank, drip flocculation agents such as TXY or PAM.This system further comprises a pressure filter 18, treats that the mud of clarifying tank 12 bottom lands reach a certain height the back discharge through pressure filter 18 press filtrations, and the clear liquid that press filtration goes out goes back to dissolved oxygen pond 11, and dried mud is collected landfill (amount seldom).
Whizzer 16 is communicated with stiff device 15, is used for that the magma after the stiff processing is carried out solid-liquid separation and separates.Whizzer 16 is dull and stereotyped whizzer or the continuous pusher centrifuge of piston-type.Small scale select dull and stereotyped whizzer for use, scale can be selected the continuous pusher centrifuge of piston-type greatly for use.But the clear liquid loopback evaporation unit that whizzer 16 throws away continues evaporation concentration.
See also Fig. 3, show the structural representation of evaporation unit.Illustrated evaporation unit adopts triple effect evaporation technology.Evaporation unit 14 comprises I single-effect evaporator 141, II single-effect evaporator 142, III single-effect evaporator 143.I single-effect evaporator 141 is communicated with strainer 13, and promptly the clear liquor in the clarifying tank 12 is after strainer 13 filters, and filtrating gets into I single-effect evaporator 141; Promptly get into the evaporative crystallization circulation; Handle through triple effect evaporation, get into stiff device 15 stiffs, and then deliver to whizzer 16 and carry out spinning; After the drying be recyclable thenardite again, as shown in Figure 2.
Above-mentioned desulfurization product reclaims technology and system, with desuifurized dissolving and oxidation, generates metabisulfite solution; And then clarification, evaporative crystallization separates; Drying gets final product reclaim(ed) sulfuric acid sodium, thereby will need the desuifurized finished product saltcake that becomes of landfill; Reach the effect of " turning waste into wealth ", the benefit of generation can remedy desulphurization cost.In addition, the secondary environmental pollution that landfill caused in the prior art can be avoided, thereby desuifurized pollution can be reduced environment.
More than be merely preferred embodiment of the present invention,, all any modifications of within spirit of the present invention and principle, being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention not in order to restriction the present invention.
Claims (10)
1. a desulfurization product reclaims technology, is used to reclaim the semi-dry desulphurization product, and said technology comprises the following steps:
Collect desuifurizedly, make waste residue dissolving and oxidation, generate metabisulfite solution;
Metabisulfite solution after generating is clarified, and clarification back metabisulfite solution separates into mud and clear liquor;
Filtering clarifying liquid again with the filtrate filtered evaporative crystallization, gets the sodium sulfate magma;
The sodium sulfate magma is carried out stiff separate, reclaim behind the dry isolated solid.
2. desulfurization product as claimed in claim 1 reclaims technology; It is characterized in that; Said collection is desuifurized; Make the step of waste residue dissolving and oxidation further comprise following process: that will collect desuifurizedly blasts air through air conveying in lysate in lysate, makes the S-WAT in desuifurized fully be oxidized to sodium sulfate.
3. desulfurization product as claimed in claim 1 reclaims technology, it is characterized in that, saidly metabisulfite solution after generating is carried out further adding in the clarifying step flocculation agent quickens clarification.
4. desulfurization product as claimed in claim 1 reclaims technology, it is characterized in that, adopts two effects, triple effect or quadruple effect evaporation technology in the said evaporative crystallization step, and with advection or adverse current feeding technology and advection desalting technique.
5. desulfurization product as claimed in claim 4 reclaims technology; It is characterized in that; Magma solid-liquid volume ratio in the effect body of said two effects, triple effect or quadruple effect evaporation technology is controlled at 20% ~ 25% scope; In the stiff sepn process, carry out stiff earlier and handle, make that the solid-liquid volume ratio after the stiff is 40% ~ 60%, carry out spinning again.
6. desulfurization product as claimed in claim 1 reclaims technology, it is characterized in that, further will clarify the isolating filter pressing in back, collects the dried mud that press filtration goes out, and the cleaner liquid that press filtration goes out repeats front dissolving and oxidation and two steps of clarification.
7. desulfurization product as claimed in claim 2 reclaims technology, it is characterized in that, when reclaiming behind the isolated solid of said drying, through drying moisture is dropped to below the 1wt%, obtains thenardite.
8. a desulfurization product recovery system is used for realizing reclaiming technology like each described desulfurization product of claim 1-7, and said system comprises dissolved oxygen pond, clarifying tank, strainer, evaporation unit, stiff device, whizzer and drying machine; Said dissolved oxygen pond is used for material dissolution and oxidation, generates metabisulfite solution, and raw material is desuifurized for what collect; Said clarifying tank is communicated with said dissolved oxygen pond and receives the metabisulfite solution that generates from said dissolved oxygen pond, is used for the metabisulfite solution after generating is clarified, and makes metabisulfite solution separate into mud and clear liquor; Said strainer is communicated with said clarifying tank and receives from the isolated clear liquor of said clarifying tank; Be used for filtering clarifying liquid, the filtrating that leaches is delivered in the evaporation unit, and said evaporation unit is communicated with strainer; Be used for the filtrate filtered evaporative crystallization is obtained the sodium sulfate magma; Said stiff device is communicated with said evaporation unit; Being used for that the sodium sulfate magma is carried out stiff handles; Said whizzer is communicated with said stiff device; Be used for that the magma after the stiff processing is carried out solid-liquid separation and separate, said drying machine is used for dry isolated solid, to reclaim dried solid product.
9. desulfurization product recovery system as claimed in claim 8; It is characterized in that; Said evaporation unit is two effects, triple effect or quadruple effect evaporation unit, and said strainer is sand-bed filter or automatic backwash continuous filter, and said whizzer is dull and stereotyped whizzer or the continuous pusher centrifuge of piston-type.
10. molten tin bath bottom land pumped vacuum systems as claimed in claim 8 is characterized in that, said raw material through pipeline with air conveying to the dissolved oxygen pond.
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|---|---|---|---|
| CN2012100470046A CN102530997A (en) | 2012-02-28 | 2012-02-28 | Desulfurization product recycling technology and system |
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|---|---|---|---|
| CN2012100470046A CN102530997A (en) | 2012-02-28 | 2012-02-28 | Desulfurization product recycling technology and system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923893A (en) * | 2012-10-30 | 2013-02-13 | 山东沃蓝生物集团有限公司 | System and method for treating wastewater containing sodium chloride |
| CN104803525A (en) * | 2014-12-10 | 2015-07-29 | 青岛和合汇途工程技术有限公司 | Method for processing high salinity wastewater and device thereof |
| CN106395947A (en) * | 2016-11-03 | 2017-02-15 | 南京格洛特环境工程股份有限公司 | Dual-medium evaporative crystallization device and process |
| CN106587477A (en) * | 2016-12-21 | 2017-04-26 | 北京燕山翔宇环保工程技术有限公司 | System and method for treating industrial waste lye |
| CN107051155A (en) * | 2017-03-24 | 2017-08-18 | 江苏白玫化工有限公司 | A kind of low-grade bittern containing alkali is used for the method for flue gas desulfurization oxidation nitre |
| CN108328839A (en) * | 2018-03-23 | 2018-07-27 | 上海力脉环保设备有限公司 | A kind of sodium alkali flue gas desulfurization wastewater treatment system and application method |
| CN110856778A (en) * | 2018-08-22 | 2020-03-03 | 南风化工集团股份有限公司 | Separation and recovery technology for solid waste in flue gas desulfurization |
| CN112607750A (en) * | 2021-01-12 | 2021-04-06 | 导洁(北京)环境科技有限公司 | System and process for co-producing sodium sulfate and sodium chloride by using flue gas dry desulfurization waste residues |
| CN114195174A (en) * | 2021-11-18 | 2022-03-18 | 武汉钢铁有限公司 | Method for preparing sodium sulfate from sodium bicarbonate desulfurized fly ash by wet method |
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| CN102275955A (en) * | 2011-05-17 | 2011-12-14 | 湖南丽臣实业股份有限公司 | Method for preparing mirabilite by using sulfonated end gas absorption solution, and apparatus thereof |
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2012
- 2012-02-28 CN CN2012100470046A patent/CN102530997A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102275955A (en) * | 2011-05-17 | 2011-12-14 | 湖南丽臣实业股份有限公司 | Method for preparing mirabilite by using sulfonated end gas absorption solution, and apparatus thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923893A (en) * | 2012-10-30 | 2013-02-13 | 山东沃蓝生物集团有限公司 | System and method for treating wastewater containing sodium chloride |
| CN104803525A (en) * | 2014-12-10 | 2015-07-29 | 青岛和合汇途工程技术有限公司 | Method for processing high salinity wastewater and device thereof |
| CN104803525B (en) * | 2014-12-10 | 2017-01-11 | 青岛和合汇途工程技术有限公司 | Method for processing high salinity wastewater and device thereof |
| CN106395947A (en) * | 2016-11-03 | 2017-02-15 | 南京格洛特环境工程股份有限公司 | Dual-medium evaporative crystallization device and process |
| CN106587477A (en) * | 2016-12-21 | 2017-04-26 | 北京燕山翔宇环保工程技术有限公司 | System and method for treating industrial waste lye |
| CN107051155A (en) * | 2017-03-24 | 2017-08-18 | 江苏白玫化工有限公司 | A kind of low-grade bittern containing alkali is used for the method for flue gas desulfurization oxidation nitre |
| CN107051155B (en) * | 2017-03-24 | 2020-01-10 | 江苏白玫化工有限公司 | Method for preparing nitrate by using low-grade alkali-containing brine for flue gas desulfurization-oxidation |
| CN108328839A (en) * | 2018-03-23 | 2018-07-27 | 上海力脉环保设备有限公司 | A kind of sodium alkali flue gas desulfurization wastewater treatment system and application method |
| CN108328839B (en) * | 2018-03-23 | 2020-11-10 | 上海力脉环保设备有限公司 | Sodium-alkali flue gas desulfurization wastewater treatment system and use method |
| CN110856778A (en) * | 2018-08-22 | 2020-03-03 | 南风化工集团股份有限公司 | Separation and recovery technology for solid waste in flue gas desulfurization |
| CN112607750A (en) * | 2021-01-12 | 2021-04-06 | 导洁(北京)环境科技有限公司 | System and process for co-producing sodium sulfate and sodium chloride by using flue gas dry desulfurization waste residues |
| CN114195174A (en) * | 2021-11-18 | 2022-03-18 | 武汉钢铁有限公司 | Method for preparing sodium sulfate from sodium bicarbonate desulfurized fly ash by wet method |
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Application publication date: 20120704 |