CN101143298B - High-efficiency wet-desulfurizing dust remover - Google Patents

High-efficiency wet-desulfurizing dust remover Download PDF

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Publication number
CN101143298B
CN101143298B CN2006100322265A CN200610032226A CN101143298B CN 101143298 B CN101143298 B CN 101143298B CN 2006100322265 A CN2006100322265 A CN 2006100322265A CN 200610032226 A CN200610032226 A CN 200610032226A CN 101143298 B CN101143298 B CN 101143298B
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absorption tower
cylinder
chamber
communicated
core
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CN101143298A (en
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陈汉东
王继徽
魏先勋
陈建军
张海良
肖彬
周炜
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Hunan Hongfeng agricultural science and Technology Co., Ltd.
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TANXIANG NANFANG HIGH TECHNOLOGY RESEARCH INSTITUTE
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Abstract

The invention discloses a high efficiency wet method desulphurization and dedusting device. The invention comprises an absorption tower, a general exhaust pipe, an induced draft fan and a chimney. The absorption tower has a pretreatment chamber which is used to communicate with boiler smoke vent. The gas outlet of the absorption tower in turn passes by the general exhaust pipe and the induced draft fan, and then is communicated with the gas inlet of the chimney. The absorption tower has an outer cylinder and an inner cylinder arranged inside the absorption tower. The tower bottom which is on the lower part of the inner cylinder end, is an alkaline slurry pool. The pretreatment chamber is on one side of the upper part of the outer cylinder, and is communicated with an internal cavity of the outer cylinder. A spray device is arranged on the upper part of the treatment chamber internal cavity. A spray device is arranged on the top of the outer cylinder cavity. The internal cavity of the inner cylinder is communicated with the internal cavity of the outer cylinder through an impact channel on the bottom. A moisture separator is arranged on the upper end of the inner cylinder. The inner cylinder upper end port which is also the gas outlet of the absorption tower is communicated with the gas inlet end of the induced draft fan through the general exhaust pipe. The device has novel and compact structure, little water consumption and low operation cost. The desulphurization efficiency can achieve 95 percent; the dedusting efficiency can achieve above 99 percent; the lindeman black grade is less than one grade.

Description

High-efficiency wet-desulfurizing dust remover
Technical field
The present invention relates to a kind of high-efficiency wet-desulfurizing dust remover of mainly fire coal boiler fume being handled.
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-removing desulfurating apparatus to coal-fired flue-gas mainly adopts wet method, dry method, semidry method and sulphur nitrogen mechanical and hydraulic combined dust doctor treatment both at home and abroad, and 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 high-efficiency wet-desulfurizing dust remover, be mainly used in the desulfurization and dedusting of fire coal boiler fume, its water consumption is few, and operating cost is low, and device structure is novel compact, and dust-removal and desulfurizing efficient height is effective.
A kind of high-efficiency wet-desulfurizing dust remover, this device comprises absorption tower, total air escape pipe, air-introduced machine, chimney, it is characterized in that, there is the pretreatment chamber that is communicated with in order to the boiler exhaust gas road on described absorption tower, and the gas vent on this absorption tower is communicated with the air inlet of described chimney through total air escape pipe and air-introduced machine successively again; The inner core that there is urceolus on described absorption tower and is mounted in it, the tower bottom of below, inner core bottom is divided into the alkaline slurry pond, described pretreatment chamber is positioned at urceolus top one side and is communicated with the inner chamber of urceolus, this process chamber inner chamber top is equipped with spray equipment, spray equipment is equipped with at outer tube inner chamber top, interior tube inner chamber is communicated with the inner chamber of urceolus through the impact passage of bottom, inner core upper end is equipped with moisture trap, is connected with the inlet end of described air-introduced machine by total air escape pipe as the inner core upper port of absorption tower gas vent.
Below the present invention made further specify.
Referring to Fig. 1 and Fig. 2, high-efficiency wet-desulfurizing dust remover of the present invention comprises absorption tower 12, total air escape pipe 10, air-introduced machine 14, chimney 15, it is characterized in that, there is the pretreatment chamber 7 that is communicated with in order to the boiler exhaust gas road on described absorption tower 12, and the gas vent on this absorption tower 12 is communicated with the air inlet of described chimney 15 through total air escape pipe 10 and air-introduced machine 14 successively again; The inner core 2 that there is urceolus 3 on described absorption tower 12 and is mounted in it, 5 parts are the alkaline slurry pond at the bottom of the tower of below, inner core 2 bottoms, described pretreatment chamber 7 is positioned at urceolus 3 tops, one side and is communicated with the inner chamber of urceolus 3, these process chamber 7 inner chamber tops are equipped with spray equipment 8, top of chamber is equipped with spray equipment 19 in the urceolus 3, inner core 2 inner chambers are communicated with the inner chamber of urceolus 3 through the impact passage 4 of bottom, inner core 2 upper ends are equipped with moisture trap 9, are connected by the inlet end of total air escape pipe 10 with described air-introduced machine 14 as inner core 2 upper port of absorption tower 12 gas vents.
On the described total air escape pipe 10 temperature control equipment 13 is housed.
Described separator 9 can be two-stage swirl vane or herringbone fashion separator, and its wind speed is 2~8M/Sec.
Described nozzle 1 can adopt the empty conical nozzle of tangent line.
Described alkaline slurry is meant any in boiler flushing cinder water, limewash, the soda bath.
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 spray equipment 8 supply, enter urceolus 3 inner chambers through pretreated gas, screw is down by the three-dimensional spray washing of alkaline slurry mist pearl, enter inner core 2 through impacting passage 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 control equipment 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 the tangent line of spray equipment 19 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 2~8M/S, with mist pearl collision in the air-flow, 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.
In addition, as shown in Figure 1, can adopt the circulatory system of reactant liquor; Its use 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.
This device structure is novel compact, and water consumption is few, and operating cost is low, 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
The 6-leakage fluid dram 7-8-of pretreatment chamber 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 19-spray equipment
Specific implementation method
The fire coal boiler fume wet desulfurization dust-removing device comprises absorption tower 12, total air escape pipe 10, air-introduced machine 14, chimney 15, circulating pump 16, circulatory pool 17 and flushing cinder water treatment system 18,5 alkaline slurries that PH 〉=12 are arranged at the bottom of the tower on described absorption tower 12, the absorption tower comprises urceolus 3 and inner core 2, urceolus 3 tops are equipped with the spray equipment 19 of the empty conical nozzle 1 of band tangent line, and urceolus 3 tops one side is provided with pretreatment chamber 7, its inside is equipped with spray equipment 8, inner core 2 bottoms have the passage 4 of impact to be communicated with urceolus 3, inner core 2 upper ends are equipped with separator 9, inner core 2 is connected by total air escape pipe 10 with air-introduced machine 14, is communicated with chimney 15 at last.
Dust-laden sulfur-containing smoke gas stream from boiler 11, at first enter in the pretreatment chamber 7 on absorption tower 12, contact with the alkaline slurry of the atomizing of spray equipment 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 2~8M/Sec through wind speed, with mist pearl collision in the air-flow, 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 (3)

1. high-efficiency wet-desulfurizing dust remover, this device comprises absorption tower (12), total air escape pipe (10), air-introduced machine (14), chimney (15), it is characterized in that, there is the pretreatment chamber (7) that is communicated with in order to the boiler exhaust gas road on described absorption tower (12), and the gas vent of this absorption tower (12) is communicated with the air inlet of described chimney (15) through total air escape pipe (10) and air-introduced machine (14) successively again; The inner core (2) that there is urceolus (3) on described absorption tower (12) and is mounted in it, (5) are the alkaline slurry pond at the bottom of the tower of below, inner core (2) bottom, described pretreatment chamber (7) is positioned at urceolus (3) top one side and is communicated with the inner chamber of urceolus (3), this process chamber (7) inner chamber top is equipped with first spray equipment (8), the interior top of chamber of urceolus (3) is equipped with second spray equipment (19), inner core (2) inner chamber is communicated with the inner chamber of urceolus (3) through the impact passage (4) of bottom, inner core (2) upper end is equipped with moisture trap (9), is connected by the inlet end of total air escape pipe (10) with described air-introduced machine (14) as inner core (2) upper port of absorption tower (12) gas vent.
2. high-efficiency wet-desulfurizing dust remover according to claim 1 is characterized in that, temperature control equipment (13) is housed on the described total air escape pipe (10).
3. high-efficiency wet-desulfurizing dust remover according to claim 1 is characterized in that, described separator (9) is two-stage swirl vane or herringbone fashion separator, and its wind speed is 2~8m/s.
CN2006100322265A 2006-09-11 2006-09-11 High-efficiency wet-desulfurizing dust remover Active CN101143298B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104713111A (en) * 2015-03-09 2015-06-17 广西三维铁路轨道制造有限公司 Boiler flue gas treatment device
CN104801128A (en) * 2015-04-18 2015-07-29 东莞市华荣涂装设备有限公司 Cooling and purifying environment protection system for industrial waste gas emissions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2277489Y (en) * 1996-06-28 1998-04-01 董鸿聚 Boiler smoke desulphurizing dust remover
US5779999A (en) * 1995-12-29 1998-07-14 Marsulex Environmental Technologies, Llc Method for scrubbing flue gases
CN2400173Y (en) * 1999-12-13 2000-10-11 宫起光 Wet dust-removing desulphurization plant
CN2522155Y (en) * 2001-09-29 2002-11-27 温州阳光环保设备有限公司 Heat-exchanging type sweetening cleaner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5779999A (en) * 1995-12-29 1998-07-14 Marsulex Environmental Technologies, Llc Method for scrubbing flue gases
CN2277489Y (en) * 1996-06-28 1998-04-01 董鸿聚 Boiler smoke desulphurizing dust remover
CN2400173Y (en) * 1999-12-13 2000-10-11 宫起光 Wet dust-removing desulphurization plant
CN2522155Y (en) * 2001-09-29 2002-11-27 温州阳光环保设备有限公司 Heat-exchanging type sweetening cleaner

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Effective date of registration: 20120529

Address after: 411100 China Hunan city of Xiangtan Province Guang Yun Road No. 602 building 201 room 30 Civil Affairs Bureau

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Patentee before: Tanxiang Nanfang High Technology Research Institute

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Owner name: HU NAN HONGFENG AGRICULTURAL TECHNOLOGY CO., LTD.

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