CN101121096A - Wet type desulfurizing dust-removing technology for fire coal boiler fume - Google Patents

Wet type desulfurizing dust-removing technology for fire coal boiler fume Download PDF

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Publication number
CN101121096A
CN101121096A CNA200610032065XA CN200610032065A CN101121096A CN 101121096 A CN101121096 A CN 101121096A CN A200610032065X A CNA200610032065X A CN A200610032065XA CN 200610032065 A CN200610032065 A CN 200610032065A CN 101121096 A CN101121096 A CN 101121096A
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China
Prior art keywords
gas
technology
dust
wet type
alkaline slurry
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CNA200610032065XA
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Chinese (zh)
Inventor
陈汉东
魏先勋
王继徽
陈建军
张海良
肖彬
周炜
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Hunan Nanxin Environmental Protection Technology Co. Ltd.
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TANXIANG NANFANG HIGH TECHNOLOGY RESEARCH INSTITUTE
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Priority to CNA200610032065XA priority Critical patent/CN101121096A/en
Publication of CN101121096A publication Critical patent/CN101121096A/en
Pending legal-status Critical Current

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Abstract

A west desulfuration and dust removing technology of coal boiler smoke is characterized in that the course of the technology includes that the smoke which contains dust and sulfur contacts an atomized alkaline serum to primarily soak the smoke dust granules and collect the big smoke dust granules; the smoke after soakage and a primary purification orthogonally contacts the alkaline serum to form a rotary airflow, which makes SO2 in the smoke further react with fog beads of the alkaline serum, and the smoke after reaction impacts the alkaline serum for an absorption towards a lower guide opening and forms a foam liquid fog layer; the fine smoke dust in the smoke adheres to and is retained on the foam surface and is removed through the foam liquid fog layer; then the airflow which contains liquid is processed by a gas and liquid separation to obtain purified gas; the temperature of the purified airflow after the separation is heated to 65 DDG C to 80 DEG C, as so to improve a saturated steam pressure of the gas; finally, the heated purified gas is introduced into a fan and is discharged into the atmosphere through a chimney. The present invention has simple and advanced technology, little water consumption, low operation charge and a very good dust removing and desulfuration efficiency.

Description

A kind of wet type desulfurizing dust-removing technology for fire coal boiler fume
Technical field
The present invention relates to a kind of wet type desulfurizing dust-removing technology for fire coal boiler fume.
Background technology
China is coal-fired big country, annual flue dust of discharging from various coal-burning boilers has tens million of tons, and these dust-laden sulfur-containing smoke gas without any processing directly are discharged in the atmosphere, are the main causes that causes atmosphere pollution, the oxysulfide that contains in the coal-fired flue-gas particularly, be discharged in the atmosphere, combine, form acid rain with vapor in the atmosphere, contaminated land, the water source causes serious destruction for industrial or agricultural and ecological environment, also endangers the healthy of people.At present, the dust-removal and desulfurizing of coal-fired flue-gas is handled mainly contained wet method, dry method, semidry method and sulphur nitrogen mechanical and hydraulic combined dust doctor treatment both at home and abroad, this several method has following shortcoming: the one, and complex process equipment, cost is higher; The 2nd, dust-removal and desulfurizing efficient is not high; The 3rd, the operating cost height is unfavorable for promoting the use of.
Summary of the invention:
At above defective, the invention provides a kind of wet type desulfurizing dust-removing technology for fire coal boiler fume, its technology is simple, and water consumption is few, and operating cost is low, and device structure is novel compact, and dust-removal and desulfurizing efficient height is effective.
Concrete technical scheme of the present invention is that the process of described wet type desulfurizing dust-removing technology for fire coal boiler fume comprises:
1) wetting and first the purification: the dust-laden sulfur-containing smoke gas contacts with the alkaline slurry of atomizing, and soot dust granule is tentatively soaked into, and big soot dust granule is collected;
2) self-excitation is strengthened: contact with the alkaline slurry quadrature that sprays vertically downward through wetting and first flue gas after being purified, screw forms swirling eddy down again, makes SO in the flue gas 2Further react with the alkaline slurry of atomizing, the downward again targeting port of reacted flue gas impacts the alkaline slurry that is used to absorb, and is excited into the liquid mist automatically, forms foam solution mist layer;
3) froth bed absorb, dedusting: by above-mentioned foam solution mist layer, atomic tiny flue dust adheres to and is trapped in foam surface in the flue gas, makes it to obtain to remove; Then:
4) gas-liquid separation: will contain liquid air-flow introducing separator and carry out gas-liquid separation, and be purified gas;
5) gas is heated: the purifying gas flow temperature after will separating is heated to 65 ℃-80 ℃, to mention the saturated vapor pressure of gas;
6) exhaust: heated purified gas is introduced air-introduced machine, enter atmosphere by chimney.
Further, the liquid-vapour ratio of the alkaline slurry of described atomizing and flue gas is 0.3-0.5 liter/M 3
Further, the alkaline slurry of described atomizing adopts the empty conical nozzle of tangent line to produce.
Further, gas-liquid separation adopts two-stage swirl vane or herringbone fashion separator to realize that its wind speed is 2~3M/Sec.
Further, described gas is heated and is utilized residual heat from boiler fume to heat or electrical heating.
Further, described alkaline slurry is controlled at PH 〉=12; When alkaline slurry PH<12, itself and other absorbent, recirculated water are mixed with the reactant liquor of PH 〉=12, wherein absorbent refers to industrial alkalies or limewash, soda bath.
Further, described alkaline slurry can be recycled.
Further, the described alkaline slurry that is used to absorb is stirred.
Further, described alkaline slurry is meant any in boiler flushing cinder water, limewash, the soda bath.
Further, to the regular water flushing of described separator.
With reference to Fig. 1 and 2, the course of work of the present invention is described below: the dust-laden sulfur-containing smoke gas that comes from boiler flows, at first enter in the pretreatment chamber 7 on absorption tower 12, contact with the alkaline slurry of the atomizing of liquid feed device 8 supply, enter urceolus 3 through pretreated gas, screw is down by the three-dimensional spray washing of alkaline slurry mist pearl, enter inner core 2 through impacting passway 4 again, carry out gas-liquid separation by inner core 2, air-flow after the separation enters total air escape pipe 10, regulate flue-gas temperatures to 65 ℃-80 ℃ by Temperature-controlled appliance 13, and introduce, drain by chimney 15 by air-introduced machine 14.
Wherein the step of flue gas process in absorption tower 12 has: 1) through the empty conical nozzle 1 of tangent line alkaline slurry is atomized, be atomized into the alkaline slurry of granularity and the liquid-vapour ratio of the flue gas of coming in is 0.3-0.5 liter/M 3, dust-laden sulfur-containing smoke gas stream is along forming swirling eddy, the SO in the flue gas with spray washing slurries orthogonal direction 2Alkaline slurry than large tracts of land and atomizing fully reacts, and falls into reactant liquor; When 2) rotating to urceolus 3 bottoms through wetting flue gas stream with purification, high-speed motion owing to flue gas this moment, forming passway 4 between urceolus 3 and inner core 2 impacts, described passage 4 impacts some and is blocked by liquid level, the flue gas impulse impacts the water layer of passage 4 liquid levels, automatically intensify the liquid mist, form foam solution mist layer; 3) by this layer foam solution mist layer, atomic tiny flue dust adheres to and is trapped in foam surface in the flue gas.Adopt above-mentioned rotational flow and spray, self-excitation boiling and foam to absorb three grades of desulfurization and dedustings, gas-liquid is fully contacted, guarantee the high efficiency that purifies.
The gas-liquid separation process of carrying out after three grades of desulfurization and dedustings is: what form after flue gas desulfurization and dedusting is finished contains the liquid air-flow, through separator 9, separator 9 wind speed wherein are 2~6M/S, mist pearl in the air-flow is extracted on the blower fan, utilize swirl vane that tiny mist pearl is got rid of down, the air-flow after the separation enters total air escape pipe 10.Wherein temperature control equipment 13 can utilize residual heat from boiler fume to heat or electrical heating, and the temperature of flue gas is controlled at more than the dew point, promptly is controlled at the 65-80 degree.Adopt this whirlwind or herringbone fashion dehydration technique and flue gas reheat device, can be strictly on guard against fan belt water and dewfall, guarantee that production operation is stable.
Wherein the process that recycles of reactant liquor is, the reactant liquor that transports from circulating pump 16, enter by empty conical nozzle 1 sprinkling of absorption tower 12 top tangent lines, in absorption tower 12, fully carry out the gas-liquid two-phase contact, after drop absorbs flue dust and oxysulfide, leakage fluid dram 6 flows out at the bottom of the tower, enter flushing cinder water treatment system 18, after precipitation process, can be mixed with reactant liquor again, send to absorption tower 12, recycle repeatedly by circulating pump 16, wherein the pH value of reactant liquor is greater than 12, if pH value is lower than 12, then, be mixed with reactant liquor with recirculated water by adding other absorbent.Absorbent wherein refers to the liquid of all band alkaline matters such as industrial alkalies, limewash, soda bath.Be installed in the separator 9 of absorption tower inner core 2, water flushing regularly, flushing cinder water is as the supplementing water on absorption tower 12.Described reactant liquor can be any in the fresh water (FW)s such as boiler flushing cinder water, limewash, soda bath.Therefore the present invention can make full use of flushing cinder water, makes flue dust, waste residue and waste water realize " innoxious " in circulation, and " treatment of wastes with processes of wastes against one another " to greatest extent reduces operating cost.
Technology of the present invention is simply advanced, and water consumption is few, and operating cost is low, and device structure is novel compact, and desulfuration efficiency reaches 95%, efficiency of dust collection>99%, lingemann blackness<1 grade.
Description of drawings
Fig. 1 is that spray is from the excitation device flow chart
Fig. 2 is the structural representation of wet desulfurization dust-removing device
In the accompanying drawing:
The empty conical nozzle 2-of 1-tangent line inner core 3-urceolus 4-impacts passage
6-leakage fluid dram 7-process chamber 8-spray equipment at the bottom of the 5-tower
9-separator 10-total air escape pipe 11-boiler 12-absorption tower
13-temperature control equipment 14-air-introduced machine 15-chimney 16-circulating pump
17-circulatory pool 18-flushing cinder water treatment system
Specific implementation method
The dust-laden sulfur-containing smoke gas that comes from boiler flows, at first enter in the pretreatment chamber 7 on absorption tower 12, contact with the alkaline slurry of the atomizing of liquid feed device 8 supply, enter urceolus 3 through pretreated gas, screw is down by the three-dimensional spray washing of alkaline slurry mist pearl, impact through passage 4 again and enter inner core 2, separator 9 by inner core 2 carries out gas-liquid separation, air-flow after the separation enters total air escape pipe 10, regulate flue-gas temperatures to 65 ℃-80 ℃ by Temperature-controlled appliance 13, and, drain by chimney 15 by air-introduced machine 14 introducings.
Flue gas at first atomizes alkaline slurry through the empty conical nozzle 1 of tangent line in absorption tower 12, is atomized into the alkaline slurry of granularity and the liquid-vapour ratio of the flue gas of coming in is 0.3-0.5 liter/M 3, dust-laden sulfur-containing smoke gas stream is along forming swirling eddy, the SO in the flue gas with spray washing slurries orthogonal direction 2Fully react than large tracts of land and alkaline slurry mist pearl, fall at the bottom of the tower 5 alkaline slurry; Rotated at the bottom of the tower 5 o'clock through wetting and the flue gas stream that purifies, the water layer of impulse passage 4 impact liquid levels forms foam solution mist layer; By this layer foam solution mist layer, atomic tiny flue dust adheres to and is trapped in foam surface in the flue gas; Containing the liquid air-flow afterwards is the separator 9 of 2~6M/Sec through wind speed, and mist pearl in the air-flow is extracted on the blower fan, utilizes swirl vane that tiny mist pearl is got rid of down, and the air-flow after the separation enters total air escape pipe 10; Temperature control equipment 13 can utilize residual heat from boiler fume to heat, and the temperature of flue gas is controlled at 70 degree.
Reactant liquor can be recycled: the reactant liquor that transports from circulating pump 16, enter by empty conical nozzle 1 sprinkling of absorption tower 12 top tangent lines, in absorption tower 12, fully carry out the gas-liquid two-phase contact, after drop absorbs flue dust and oxysulfide, 5 leakage fluid dram 6 flows out at the bottom of the tower, enters flushing cinder water treatment system 18, can be mixed with reactant liquor again after precipitation process, send to absorption tower 12 by circulating pump 16, recycle repeatedly.

Claims (10)

1. a wet type desulfurizing dust-removing technology for fire coal boiler fume is characterized in that, the process of this technology comprises:
1) wetting and first the purification: the dust-laden sulfur-containing smoke gas contacts with the alkaline slurry of atomizing, and soot dust granule is tentatively soaked into, and big soot dust granule is collected;
2) self-excitation is strengthened: contact with the alkaline slurry quadrature that sprays vertically downward through wetting and first flue gas after being purified, screw forms swirling eddy down again, makes SO in the flue gas 2Further react with alkaline slurry mist pearl, the downward again targeting port of reacted flue gas impacts the alkaline slurry that is used to absorb, and is excited into the liquid mist automatically, forms foam solution mist layer;
3) froth bed absorb, dedusting: by above-mentioned foam solution mist layer, atomic tiny flue dust adheres to and is trapped in foam surface in the flue gas, makes it to obtain to remove; Then:
4) gas-liquid separation: will contain liquid air-flow introducing separator and carry out gas-liquid separation, and be purified gas;
5) gas is heated: the purifying gas flow temperature after will separating is heated to 65 ℃-80 ℃, to mention the saturated vapor pressure of gas;
6) exhaust: heated purified gas is introduced air-introduced machine, enter atmosphere by chimney.
2. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that, the alkaline slurry of described atomizing and the liquid-vapour ratio of flue gas are 0.3-0.5 liter/M 3
3. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that, the alkaline slurry of described atomizing adopts the empty conical nozzle of tangent line to produce.
4. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that, gas-liquid separation adopts two-stage swirl vane or herringbone fashion separator to realize that its wind speed is 2~3M/Sec.
5. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that, described gas is heated and utilized residual heat from boiler fume to heat or electrical heating.
6. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that described alkaline slurry is controlled at PH 〉=12; When alkaline slurry PH<12, itself and other absorbent, recirculated water are mixed with the reactant liquor of PH 〉=12, wherein absorbent refers to industrial alkalies or limewash, soda bath.
7. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that described alkaline slurry can be recycled.
8. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that, described alkaline slurry is stirred.
9. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 1 is characterized in that, described alkaline slurry is meant any in boiler flushing cinder water, limewash, the soda bath.
10. wet type desulfurizing dust-removing technology for fire coal boiler fume according to claim 4 is characterized in that, to the regular water flushing of described separator.
CNA200610032065XA 2006-08-07 2006-08-07 Wet type desulfurizing dust-removing technology for fire coal boiler fume Pending CN101121096A (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101357297B (en) * 2008-09-18 2011-05-25 佛山市三水区碧源环保工程有限公司 Wet desulfurization dust-removing device and processing method thereof
CN103868164A (en) * 2014-04-02 2014-06-18 周柏林 Portable ultrasonic air, fog and liquid air purifier
CN103868156A (en) * 2014-04-02 2014-06-18 周泉清 Ultrasonic air, fog and liquid air purification air conditioner and air purification air conditioning method thereof
CN103863065A (en) * 2014-04-02 2014-06-18 周泉清 Vehicle-mounted ultrasonic air, fog and liquid air purification air conditioning method and air purification air conditioner
CN103868163A (en) * 2014-04-02 2014-06-18 周泉清 Portable air purifier
CN103933843A (en) * 2014-04-02 2014-07-23 周泉清 Ultrasonic aerial fog liquid air purification method and ultrasonic aerial fog liquid air purification device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101357297B (en) * 2008-09-18 2011-05-25 佛山市三水区碧源环保工程有限公司 Wet desulfurization dust-removing device and processing method thereof
CN103868164A (en) * 2014-04-02 2014-06-18 周柏林 Portable ultrasonic air, fog and liquid air purifier
CN103868156A (en) * 2014-04-02 2014-06-18 周泉清 Ultrasonic air, fog and liquid air purification air conditioner and air purification air conditioning method thereof
CN103863065A (en) * 2014-04-02 2014-06-18 周泉清 Vehicle-mounted ultrasonic air, fog and liquid air purification air conditioning method and air purification air conditioner
CN103868163A (en) * 2014-04-02 2014-06-18 周泉清 Portable air purifier
CN103933843A (en) * 2014-04-02 2014-07-23 周泉清 Ultrasonic aerial fog liquid air purification method and ultrasonic aerial fog liquid air purification device
CN103933843B (en) * 2014-04-02 2016-04-27 长沙四季春环保有限公司 Supersonic gas spray film air purification method and device
CN103868164B (en) * 2014-04-02 2016-09-14 长沙四季春环保有限公司 Portable supersonic aerosol liquid air gas purifier
CN103868163B (en) * 2014-04-02 2016-09-14 长沙四季春环保有限公司 Portable air purifier
CN103868156B (en) * 2014-04-02 2017-01-11 长沙四季春环保有限公司 Ultrasonic air, fog and liquid air purification air conditioner and air purification air conditioning method thereof

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