CN102836629A - Flue gas desulfurization dust removal process and apparatus - Google Patents
Flue gas desulfurization dust removal process and apparatus Download PDFInfo
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- CN102836629A CN102836629A CN2012103291851A CN201210329185A CN102836629A CN 102836629 A CN102836629 A CN 102836629A CN 2012103291851 A CN2012103291851 A CN 2012103291851A CN 201210329185 A CN201210329185 A CN 201210329185A CN 102836629 A CN102836629 A CN 102836629A
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Abstract
The invention relates to a flue gas desulfurization dust removal technique, in particular to a flue gas desulfurization dust removal process and a flue gas desulfurization dust removal apparatus for solving the problems of overlarge occupied area in the existing flue gas desulfurization dust removal technique and unqualified discharging caused by interrupted discharging. The flue gas desulfurization dust removal process is realized by the following steps: a, ventilating sulfur-containing and ash-containing flue gas discharged from a boiler into alkaline water in a desulfurization and dust removal tower by an induced draft fan, enabling the sulfur-containing and ash-containing flue gas to be adequately contacted with the alkaline water, and absorbing sulfur dioxide, dust and nitrogen oxide in the sulfur-containing and ash-containing flue by the alkaline water; b, introducing the flue gas after being subjected to desulfurization dust removal to a turbo type dehydrating mechanism which is in high speed centrifugation rotation in the desulfurization and dust removal tower by the induced draft fan, and then dehydrating the flue gas subjected to desulfurization and dust removal by the turbo type dehydrating mechanism; and c, discharging the dehydrated flue gas out of the desulfurization and dust removal tower. The flue gas desulfurization dust removal process and the flue gas desulfurization dust removal apparatus are suitable for flue gas desulfurization dust removal in all kinds of production processes.
Description
Technical field
The present invention relates to the flue gas desulfurization and dedusting technology, specifically is a kind of fume desulfurizing and dedusting technology and device.
Background technology
Because of containing a large amount of sulfur dioxide, dust, nitrogen oxide, can cause severe contamination to atmosphere usually in the flue gas that boiler is discharged.Thereby contaminated in order to prevent atmosphere, need carry out desulfurization and dedusting to the flue gas that boiler is discharged.Existing flue gas desulfurization and dedusting technology is limit owing to the self structure principle; Mainly there is following problem: one of which, the main quick lime that adopts of existing flue gas desulfurization and dedusting technology is as desulfurizing agent, in order to reach the zero-emission standard; Usually need corresponding corollary equipment is installed, cause its floor space excessive.Its two, in existing flue gas desulfurization and dedusting technology, when the concentration of salt in the desulfurizing agent reaches capacity, need to end the desulfurization and dedusting process and extract the salt in the desulfurizing agent, cause it intermittent discharge to occur, and then cause discharging not up to standard.Based on this, be necessary to invent a kind of brand-new flue gas desulfurization and dedusting technology, excessive and cause discharging problem not up to standard because of intermittent discharge to solve existing flue gas desulfurization and dedusting technology floor space.
Summary of the invention
The present invention is excessive and because of intermittent discharge causes discharging problem not up to standard in order to solve existing flue gas desulfurization and dedusting technology floor space, and a kind of fume desulfurizing and dedusting technology and device are provided.
The present invention adopts following technical scheme to realize: fume desulfurizing and dedusting technology; This technology is to adopt following steps to realize: the sulfur-bearing ash-laden gas that a. discharges boiler through air-introduced machine feeds the alkaline water that is arranged in the desulfurization and dedusting tower; Make the sulfur-bearing ash-laden gas fully contact with alkaline water; Sulfur dioxide in the sulfur-bearing ash-laden gas, dust, nitrogen oxide are absorbed by alkaline water, and alkaline water carries out desulfurization and dedusting to the sulfur-bearing ash-laden gas thus; B. feed the turbine type dewatering device of the high speed centrifugation rotation that is positioned at the desulfurization and dedusting tower through the flue gas of air-introduced machine after with desulfurization and dedusting, the turbine type dewatering device dewaters to the flue gas behind the desulfurization and dedusting thus; The water that the turbine type dewatering device is deviate from is back in the alkaline water; C. the flue gas after will dewatering through chimney is discharged outside the desulfurization and dedusting tower; After treating that dust deposition that alkaline water absorbs is accomplished, will precipitate respectively with alkaline water discharge desulfurization and dedusting tower outside.
Desulfurating dust removing device for flue gas (this device is used to realize fume desulfurizing and dedusting technology of the present invention) comprises the first desulfurization and dedusting tower, the second desulfurization and dedusting tower, air-introduced machine, chimney, tap water pipe line, alkali lye regulating reservoir, sulfate crystal process system, liquid caustic soda pond and liquid caustic soda jar; Wherein, the outlet air end of air-introduced machine connects the inlet end of the first desulfurization and dedusting tower and the inlet end of the second desulfurization and dedusting tower respectively; The inlet end of chimney connects the outlet side of the first desulfurization and dedusting tower and the outlet side of the second desulfurization and dedusting tower respectively; Tap water pipe line connects the liquid feeding end of the first desulfurization and dedusting tower, the liquid feeding end of the second desulfurization and dedusting tower, the liquid feeding end of alkali lye regulating reservoir respectively; The outlet end of alkali lye regulating reservoir connects the liquid feeding end of the first desulfurization and dedusting tower and the liquid feeding end of the second desulfurization and dedusting tower respectively; The liquid feeding end of sulfate crystal process system connects the outlet end of the first desulfurization and dedusting tower and the outlet end of the second desulfurization and dedusting tower respectively; The outlet end in liquid caustic soda pond connects the liquid feeding end of liquid caustic soda jar; The outlet end of liquid caustic soda jar connects the liquid feeding end of the first desulfurization and dedusting tower; In the first desulfurization and dedusting tower with in the second desulfurization and dedusting tower turbine type dewatering device is installed respectively.
During work, the air intake of air-introduced machine connects boiler.Store liquid caustic soda in the liquid caustic soda pond.Store alkali lye in the alkali lye regulating reservoir.In the first desulfurization and dedusting tower He in the second desulfurization and dedusting tower, inject water respectively through tap water pipe line.The liquid caustic soda pond is injected liquid caustic soda through the liquid caustic soda jar in the first desulfurization and dedusting tower.The alkali lye regulating reservoir injects alkali lye respectively in the first desulfurization and dedusting tower He in the second desulfurization and dedusting tower.Liquid caustic soda, alkali lye, water mix the formation alkaline water in the first desulfurization and dedusting tower.Alkali lye, water mix the formation alkaline water in the second desulfurization and dedusting tower.The concrete course of work is following: at first, open the first desulfurization and dedusting tower, and close the second desulfurization and dedusting tower.The sulfur-bearing ash-laden gas of boiler being discharged through air-introduced machine feeds the alkaline water that is arranged in the first desulfurization and dedusting tower.The sulfur-bearing ash-laden gas fully contacts with the alkaline water that is positioned at the first desulfurization and dedusting tower, and the sulfur dioxide in the sulfur-bearing ash-laden gas, dust, nitrogen oxide are absorbed by alkaline water, and alkaline water carries out desulfurization and dedusting to the sulfur-bearing ash-laden gas thus.Then, feed the turbine type dewatering device of the high speed centrifugation rotation that is positioned at the first desulfurization and dedusting tower through the flue gas of air-introduced machine after with desulfurization and dedusting, the turbine type dewatering device dewaters to the flue gas behind the desulfurization and dedusting thus.The water that the turbine type dewatering device is deviate from is back in the alkaline water.Then, the flue gas after will dewatering through chimney is discharged outside the first desulfurization and dedusting tower.After treating that dust deposition that alkaline water absorbs is accomplished, will precipitate respectively and alkaline water is discharged outside the first desulfurization and dedusting tower, wherein alkaline water is expelled to the sulfate crystal process system and recycles.Meanwhile, close the first desulfurization and dedusting tower, and open the second desulfurization and dedusting tower.The sulfur-bearing ash-laden gas of boiler being discharged through air-introduced machine feeds the alkaline water that is arranged in the second desulfurization and dedusting tower.The sulfur-bearing ash-laden gas fully contacts with the alkaline water that is positioned at the second desulfurization and dedusting tower, and the sulfur dioxide in the sulfur-bearing ash-laden gas, dust, nitrogen oxide are absorbed by alkaline water, and alkaline water carries out desulfurization and dedusting to the sulfur-bearing ash-laden gas thus.Then, feed the turbine type dewatering device of the high speed centrifugation rotation that is positioned at the second desulfurization and dedusting tower through the flue gas of air-introduced machine after with desulfurization and dedusting, the turbine type dewatering device dewaters to the flue gas behind the desulfurization and dedusting thus.The water that the turbine type dewatering device is deviate from is back in the alkaline water.Then, the flue gas after will dewatering through chimney is discharged outside the second desulfurization and dedusting tower.After treating that dust deposition that alkaline water absorbs is accomplished, will precipitate respectively and alkaline water is discharged outside the second desulfurization and dedusting tower, wherein alkaline water is expelled to the sulfate crystal process system and recycles.Meanwhile, open the first desulfurization and dedusting tower again, and close the second desulfurization and dedusting tower again.Thus, the first desulfurization and dedusting tower and the second desulfurization and dedusting tower have just been realized the sulfur-bearing ash-laden gas that boiler is discharged is carried out unremitting desulfurization and dedusting through alternation.Based on said process; With existing flue gas desulfurization and dedusting compared with techniques; Fume desulfurizing and dedusting technology of the present invention and device have the following advantages: one of which, fume desulfurizing and dedusting technology of the present invention and device adopt alkaline water as desulfurizing agent, can directly reach the zero-emission standard; Thereby saved corresponding corollary equipment, effectively saved floor space.Its two, fume desulfurizing and dedusting technology of the present invention and device adopt the alternation of two desulfurization and dedusting towers, when the concentration of salt in the desulfurizing agent reaches capacity; Need not to end the desulfurization and dedusting process; Just can extract the salt in the desulfurizing agent, realize the free of discontinuities discharging thus, and then realize emission compliance.In sum, it is excessive and cause discharging problem not up to standard because of intermittent discharge that fume desulfurizing and dedusting technology of the present invention and device have thoroughly solved existing flue gas desulfurization and dedusting technology floor space effectively.
The present invention is based on brand-new principle and structure, it is excessive and because of intermittent discharge causes discharging problem not up to standard to efficiently solve existing flue gas desulfurization and dedusting technology floor space, is applicable to the flue gas desulfurization and dedusting in all kinds of production processes.
Description of drawings
Fig. 1 is the structural representation of desulfurating dust removing device for flue gas of the present invention.
Among the figure: the 1-first desulfurization and dedusting tower, the 2-second desulfurization and dedusting tower, 3-air-introduced machine, 4-chimney, 5-tap water pipe line; 6-alkali lye regulating reservoir, 7-sulfate crystal process system, 8-liquid caustic soda pond, 9-liquid caustic soda jar, 10-baffle plate; The 11-control valve, 12-ash discharge draining valve, 13-acid and alkali pumps, 14-boiler.
The specific embodiment
Fume desulfurizing and dedusting technology; This technology is to adopt following steps to realize: the sulfur-bearing ash-laden gas that a. discharges boiler through air-introduced machine feeds the alkaline water that is arranged in the desulfurization and dedusting tower; Make the sulfur-bearing ash-laden gas fully contact with alkaline water; Sulfur dioxide in the sulfur-bearing ash-laden gas, dust, nitrogen oxide are absorbed by alkaline water, and alkaline water carries out desulfurization and dedusting to the sulfur-bearing ash-laden gas thus; B. feed the turbine type dewatering device of the high speed centrifugation rotation that is positioned at the desulfurization and dedusting tower through the flue gas of air-introduced machine after with desulfurization and dedusting, the turbine type dewatering device dewaters to the flue gas behind the desulfurization and dedusting thus; The water that the turbine type dewatering device is deviate from is back in the alkaline water; C. the flue gas after will dewatering through chimney is discharged outside the desulfurization and dedusting tower; After treating that dust deposition that alkaline water absorbs is accomplished, will precipitate respectively with alkaline water discharge desulfurization and dedusting tower outside.
Desulfurating dust removing device for flue gas (this device is used to realize fume desulfurizing and dedusting technology of the present invention) comprises the first desulfurization and dedusting tower 1, the second desulfurization and dedusting tower 2, air-introduced machine 3, chimney 4, tap water pipe line 5, alkali lye regulating reservoir 6, sulfate crystal process system 7, liquid caustic soda pond 8 and liquid caustic soda jar 9; Wherein, the outlet air end of air-introduced machine 3 connects the inlet end of the first desulfurization and dedusting tower 1 and the inlet end of the second desulfurization and dedusting tower 2 respectively; The inlet end of chimney 4 connects the outlet side of the first desulfurization and dedusting tower 1 and the outlet side of the second desulfurization and dedusting tower 2 respectively; Tap water pipe line 5 connects the liquid feeding end of the first desulfurization and dedusting tower 1, the liquid feeding end of the second desulfurization and dedusting tower 2, the liquid feeding end of alkali lye regulating reservoir 6 respectively; The outlet end of alkali lye regulating reservoir 6 connects the liquid feeding end of the first desulfurization and dedusting tower 1 and the liquid feeding end of the second desulfurization and dedusting tower 2 respectively; The liquid feeding end of sulfate crystal process system 7 connects the outlet end of the first desulfurization and dedusting tower 1 and the outlet end of the second desulfurization and dedusting tower 2 respectively; The outlet end in liquid caustic soda pond 8 connects the liquid feeding end of liquid caustic soda jar 9; The outlet end of liquid caustic soda jar 9 connects the liquid feeding end of the first desulfurization and dedusting tower 1; In the first desulfurization and dedusting tower 1 with in the second desulfurization and dedusting tower 2 a turbine type dewatering device is installed respectively;
Between the inlet end of the outlet air end of air-introduced machine 3 and the first desulfurization and dedusting tower 1, respectively be connected with a baffle plate 10 between the inlet end of the outlet air end of air-introduced machine 3 and the second desulfurization and dedusting tower 2; Between the liquid feeding end of the outlet end of alkali lye regulating reservoir 6 and the first desulfurization and dedusting tower 1, between the liquid feeding end of the outlet end of alkali lye regulating reservoir 6 and the second desulfurization and dedusting tower 2, respectively be connected with a control valve 11 between the liquid feeding end of the outlet end of liquid caustic soda jar 9 and the first desulfurization and dedusting tower 1; Between the outlet end of the liquid feeding end of sulfate crystal process system 7 and the first desulfurization and dedusting tower 1, respectively be connected with an ash discharge draining valve 12 between the outlet end of the liquid feeding end of sulfate crystal process system 7 and the second desulfurization and dedusting tower 2; Between the liquid feeding end of the outlet end of alkali lye regulating reservoir 6 and the first desulfurization and dedusting tower 1, between the liquid feeding end of the outlet end of alkali lye regulating reservoir 6 and the second desulfurization and dedusting tower 2, respectively be connected with an acid and alkali pumps 13 between the liquid feeding end of the outlet end in liquid caustic soda pond 8 and liquid caustic soda jar 9.During work, can control opening and closing of the first desulfurization and dedusting tower and the second desulfurization and dedusting tower respectively through baffle plate.The alkali lye regulating reservoir be can regulate respectively through control valve and the amount of alkali lye, the liquid caustic soda jar injects amount from liquid caustic soda to the first desulfurization and dedusting tower injected to the second desulfurization and dedusting tower to amount, the alkali lye regulating reservoir that the first desulfurization and dedusting tower injects alkali lye.Can discharge deposition and alkaline water in the first desulfurization and dedusting tower and the second desulfurization and dedusting tower respectively through the ash discharge draining valve.Can respectively the liquid caustic soda in the liquid caustic soda pond be pumped into the liquid caustic soda jar, the alkali lye in the alkali lye regulating reservoir is pumped into the first desulfurization and dedusting tower, the alkali lye in the alkali lye regulating reservoir is pumped into the second desulfurization and dedusting tower through acid and alkali pumps.
Claims (3)
1. fume desulfurizing and dedusting technology is characterized in that: this technology is to adopt following steps to realize:
The sulfur-bearing ash-laden gas of a. through air-introduced machine boiler being discharged feeds the alkaline water that is arranged in the desulfurization and dedusting tower; Make the sulfur-bearing ash-laden gas fully contact with alkaline water; Sulfur dioxide in the sulfur-bearing ash-laden gas, dust, nitrogen oxide are absorbed by alkaline water, and alkaline water carries out desulfurization and dedusting to the sulfur-bearing ash-laden gas thus;
B. feed the turbine type dewatering device of the high speed centrifugation rotation that is positioned at the desulfurization and dedusting tower through the flue gas of air-introduced machine after with desulfurization and dedusting, the turbine type dewatering device dewaters to the flue gas behind the desulfurization and dedusting thus; The water that the turbine type dewatering device is deviate from is back in the alkaline water;
C. the flue gas after will dewatering through chimney is discharged outside the desulfurization and dedusting tower; After treating that dust deposition that alkaline water absorbs is accomplished, will precipitate respectively with alkaline water discharge desulfurization and dedusting tower outside.
2. desulfurating dust removing device for flue gas; This device is used to realize a kind of fume desulfurizing and dedusting technology as claimed in claim 1, it is characterized in that: comprise the first desulfurization and dedusting tower (1), the second desulfurization and dedusting tower (2), air-introduced machine (3), chimney (4), tap water pipe line (5), alkali lye regulating reservoir (6), sulfate crystal process system (7), liquid caustic soda pond (8) and liquid caustic soda jar (9); Wherein, the outlet air end of air-introduced machine (3) connects the inlet end of the first desulfurization and dedusting tower (1) and the inlet end of the second desulfurization and dedusting tower (2) respectively; The inlet end of chimney (4) connects the outlet side of the first desulfurization and dedusting tower (1) and the outlet side of the second desulfurization and dedusting tower (2) respectively; Tap water pipe line (5) connects the liquid feeding end of the first desulfurization and dedusting tower (1), the liquid feeding end of the second desulfurization and dedusting tower (2), the liquid feeding end of alkali lye regulating reservoir (6) respectively; The outlet end of alkali lye regulating reservoir (6) connects the liquid feeding end of the first desulfurization and dedusting tower (1) and the liquid feeding end of the second desulfurization and dedusting tower (2) respectively; The liquid feeding end of sulfate crystal process system (7) connects the outlet end of the first desulfurization and dedusting tower (1) and the outlet end of the second desulfurization and dedusting tower (2) respectively; The outlet end in liquid caustic soda pond (8) connects the liquid feeding end of liquid caustic soda jar (9); The outlet end of liquid caustic soda jar (9) connects the liquid feeding end of the first desulfurization and dedusting tower (1); In the first desulfurization and dedusting tower (1) with in the second desulfurization and dedusting tower (2) a turbine type dewatering device is installed respectively.
3. desulfurating dust removing device for flue gas according to claim 2 is characterized in that: between the inlet end of the outlet air end of air-introduced machine (3) and the first desulfurization and dedusting tower (1), respectively be connected with a baffle plate (10) between the inlet end of the outlet air end of air-introduced machine (3) and the second desulfurization and dedusting tower (2); Between the liquid feeding end of the outlet end of alkali lye regulating reservoir (6) and the first desulfurization and dedusting tower (1), between the liquid feeding end of the outlet end of alkali lye regulating reservoir (6) and the second desulfurization and dedusting tower (2), respectively be connected with a control valve (11) between the liquid feeding end of the outlet end of liquid caustic soda jar (9) and the first desulfurization and dedusting tower (1); Between the outlet end of the liquid feeding end of sulfate crystal process system (7) and the first desulfurization and dedusting tower (1), respectively be connected with an ash discharge draining valve (12) between the outlet end of the liquid feeding end of sulfate crystal process system (7) and the second desulfurization and dedusting tower (2); Between the liquid feeding end of the outlet end of alkali lye regulating reservoir (6) and the first desulfurization and dedusting tower (1), between the liquid feeding end of the outlet end of alkali lye regulating reservoir (6) and the second desulfurization and dedusting tower (2), respectively be connected with an acid and alkali pumps (13) between the liquid feeding end of the outlet end of liquid caustic soda pond (8) and liquid caustic soda jar (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210329185.1A CN102836629B (en) | 2012-09-07 | 2012-09-07 | Flue gas desulfurization dust removal process and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210329185.1A CN102836629B (en) | 2012-09-07 | 2012-09-07 | Flue gas desulfurization dust removal process and apparatus |
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| CN102836629A true CN102836629A (en) | 2012-12-26 |
| CN102836629B CN102836629B (en) | 2014-11-19 |
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Citations (6)
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| US3929967A (en) * | 1972-01-03 | 1975-12-30 | Everett Douglas Cann | High temperature flue gas treatment |
| CN1428186A (en) * | 2001-12-24 | 2003-07-09 | 熊天渝 | Sodium base or magnesium base wet flue gas desulfurizing system capable of completely recovering by-product without wastes |
| CN102049168A (en) * | 2009-10-28 | 2011-05-11 | 盐城市大天力环境治理有限公司 | Equipment for flue gas desulfurization by use of industrial wastewater |
| CN201832548U (en) * | 2010-08-27 | 2011-05-18 | 深圳市翔宇环保科技有限公司 | Denitration treatment device for purifying flue gas |
| CN201949791U (en) * | 2011-03-11 | 2011-08-31 | 王中位 | Turbine whirlpool water bath-type desulfurization and dehydration dust removing device |
| CN102527224A (en) * | 2011-12-31 | 2012-07-04 | 北京利德衡环保工程有限公司 | Method and device for removing sulfur dioxide and nitrogen oxides from flue gas/ waste gas |
-
2012
- 2012-09-07 CN CN201210329185.1A patent/CN102836629B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929967A (en) * | 1972-01-03 | 1975-12-30 | Everett Douglas Cann | High temperature flue gas treatment |
| CN1428186A (en) * | 2001-12-24 | 2003-07-09 | 熊天渝 | Sodium base or magnesium base wet flue gas desulfurizing system capable of completely recovering by-product without wastes |
| CN102049168A (en) * | 2009-10-28 | 2011-05-11 | 盐城市大天力环境治理有限公司 | Equipment for flue gas desulfurization by use of industrial wastewater |
| CN201832548U (en) * | 2010-08-27 | 2011-05-18 | 深圳市翔宇环保科技有限公司 | Denitration treatment device for purifying flue gas |
| CN201949791U (en) * | 2011-03-11 | 2011-08-31 | 王中位 | Turbine whirlpool water bath-type desulfurization and dehydration dust removing device |
| CN102527224A (en) * | 2011-12-31 | 2012-07-04 | 北京利德衡环保工程有限公司 | Method and device for removing sulfur dioxide and nitrogen oxides from flue gas/ waste gas |
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| CN102836629B (en) | 2014-11-19 |
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Owner name: SHANXI HJX ENVIRONMENTAL PROTECTION EQUIPMENT CO., Free format text: FORMER OWNER: WANG ZHONGWEI Effective date: 20150617 |
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Effective date of registration: 20150617 Address after: 034100, Xinzhou City, Shanxi province Yuanping City South Dayun Road South (Village Development Zone) Patentee after: SHANXI HJX ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. Address before: 034100 Shanxi city of Xinzhou province Yuanping City Road Bridge Beijing Hutong No. 1 Patentee before: Wang Zhongwei |
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