CN1242840C - Dual cycle pocked stone pagoda stack gas desulfurizing and dedusting apparatus - Google Patents
Dual cycle pocked stone pagoda stack gas desulfurizing and dedusting apparatus Download PDFInfo
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- CN1242840C CN1242840C CN 200310106960 CN200310106960A CN1242840C CN 1242840 C CN1242840 C CN 1242840C CN 200310106960 CN200310106960 CN 200310106960 CN 200310106960 A CN200310106960 A CN 200310106960A CN 1242840 C CN1242840 C CN 1242840C
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Abstract
The present invention relates to a stack gas desulfurizing and dedusting device with a double-circulating pocked stone pagoda, which comprises a main body of a pocked stone pagoda, a liquid distributor, a dusty water circulating system and a sedimentation tank. The present invention is characterized in that an annular wetting atomizer is arranged in the inlet channel of the pocked stone pagoda; the liquid distributor is uniformly distributed with a plurality of liquid distributing pipes adjacent to the top of the main body of the pocked stone pagoda along the circumference, and the liquid distributing pipes extend into the pocked stone pagoda; the top of the main body of the pocked stone pagoda is also provided with a two-stage desulfurizing and dedusting device. The present invention has the advantages that by adopting a double-circulating system, namely that dusty water and alkali liquid are respectively and independently circulated, and thus, the present invention enhances the utilization ratio of alkali and has stable desulfurizing and dusting process and high desulfurizing and dedusting efficiency; the present invention has high desulfurizing efficiency and performs the function of one-stage dehydration in the added two-stage desulfurizing circulation, and a low-resistance demister on the top of a desulfurizing pagoda can thoroughly remove fine water drops in the fume so as to ensure that stack gas has no water; by adopting the liquid distributing pipes to replace liquid distributing tanks, the present invention can utilize small water quantity to form a uniform falling liquid film on the inner wall of a dedusting pagoda, also overcomes the phenomenon that a deduster with a pocked stone pagoda has the failure of liquid distributing tanks due to the subsidence of the foundation so as to ensure dedusting efficiency and avoid the phenomenon of ash deposition.
Description
Technical field
The present invention relates to the boiler desulfurization dedusting technology, particularly a kind of pair of circulation pocked stone pagoda desulfurating dust removing device for flue gas.
Background technology
Middle-size and small-size power plant and big-and-middle-sized Industrial Boiler flue gas desulfurization and dedusting are related to air quality and environmental protection in the zone, are closely related with the people's health.Often use a kind of gallet water curtain dust collector in this field prior art, it is made up of pocked stone pagoda main body, Venturi tube, cloth liquid bath, grey water circulation system and settling tank etc.This deduster has effect preferably to the removing of soot dust granule thing, but not good to desulfurized effect, and its some shortcoming of also existing has also influenced normal use and dust removing effects simultaneously.The first is when desulfurization and dedusting are carried out simultaneously, if liquid distributor can not continuous water feeding, or calcium ion concentration supersaturation crystallization causes and adheres at the equipment inwall that to produce ash stifled in the alkali lye; It two is scale formations, when adding the alkali operation, because device interior filler and device space are less, and resistive connection dirt ability, sweetening liq produces calcium sulfate and calcium carbonate crystal occluding device under the high-temperature flue gas effect, cause equipment normally not move.It three is because flue gas demister poor structure, makes fan belt water, can not effectively remove the drop in the flue gas.It four is owing to during pocked stone pagoda deduster generation immerge, also be easy to cause the cloth liquid bath to tilt, and causes cloth liquid to lose efficacy, and dust stratification and efficiency of dust collection decline problem occur.
Summary of the invention
The objective of the invention is in order to overcome the deficiencies in the prior art, and provide a kind of pair of circulation pocked stone pagoda desulfurating dust removing device for flue gas, this dust arrester is taked at gas approach place increase ring-type humidification atomizer, increase the secondary desulfation dust-extraction device in the exit, and improvement liquid distribution system and modes such as buck and alkali lye independent loops, improve efficiency of dust collection, increase the desulfurization defrosting function, and convenient the use keeped in repair.
The present invention be address the above problem the scheme that is adopted be the design a kind of pair of circulation pocked stone pagoda desulfurating dust removing device for flue gas.It comprises pocked stone pagoda main body, liquid distributor, grey water circulation system and settling tank, it is characterized in that said pocked stone pagoda main body near in the intake channel of bottom, is equipped with a ring-type humidification atomizer; Said liquid distributor be the pocked stone pagoda main body near the top be uniformly distributed with along the circumference a plurality of, stretch to the liquid distributor in the tower; Said dust arrester also is provided with a secondary desulfation dust-extraction device at the top of pocked stone pagoda main body, this secondary desulfation dust-extraction device has on one, it is down the tank body of open type, be fixed with a supporting clapboard by the bottom in the tank body, plate is provided with a plurality of circular holes, correspondence is fixed a Venturi tube on each hole, and above each Venturi tube, fix a water conservancy diversion impingement baffles, corresponding Venturi tube position is provided with the shower nozzle that communicates with alkali liquor pipe under the supporting clapboard, also be fixed with an installing plate by top in the tank body, also be provided with a plurality of circular holes on the plate, correspondence is fixed a top deflection plate for the annular array of sealing demister on each hole; In the alkali liquor circulating system of this secondary desulfation dust-extraction device, alkali lye pumps into the low-resistance shower nozzle by the alkali case through alkali liquor pipe and alkali pump, spray into the low speed Venturi tube, the mixture of flue gas and alkali lye drop behind impingement baffles is removed down, liquid flows back to the alkali case via leakage fluid dram, the flue dust in the alkali case and the sediment of product enter settling tank by scum pipe, also are respectively equipped with on the alkali case to mend alkali mouth and water supplement port.
The invention has the beneficial effects as follows: it is the difference independent loops of buck and alkali lye that (1) two circulation pocked stone pagoda desulfurating dust removing device for flue gas adopts binary cycle system, has improved the utilization rate of alkali, desulfurization and dedusting process stabilization, desulfurization dust-removing efficiency height.In the buck circulation, flue dust does not have the deposition blending of alkaline residue and alkali in settling tank, and flue dust is recycling.Because flue dust is being removed more than 95% in the tower down, so product purity height in the alkali cyclic process provides advantage for further recycling in alkali circulation.(2) allow to exist excessive alkali in the alkali cyclic process, the system buffer capacity is big, and desulfuration efficiency improves, and not with SO
2The variation of load and fluctuating, because pH value is stable, fouling and the obstruction of having avoided calcium sulfate supersaturation and fluctuation to cause.(3) because halide concentrates in the buck circulation, make that therefore the selection of material of alkali lye recycle column is more economical, thereby make the cost reduction.(4) in the secondary desulphurization circulating that increases, adopt low speed venturi+impingement baffles structure, make flue gas resistance low, the desulfuration efficiency height, and played the effect that one-level is dewatered, and the low-resistance demister on desulfurizing tower top can thoroughly be removed fine liquid particles in the flue gas, the assurance flue gas is not with water.(5) establish ring-type side jet mould blocking humidification materialization device on horizontal flue, fully add wet flue gas and make the flue dust granulation, side spray structure makes flue gas directly not wash away nozzle, and flue gas resistance is low, and nozzle does not does not wear and tear.And jet head sets employing modular construction, make easy to maintenance.(6) adopt liquid distributor to replace the cloth liquid bath, can utilize the less water yield to make the gas wash tower inwall form the liquid film of even decline, also overcome the pocked stone pagoda deduster because the cloth liquid bath failure phenomenon that immerge causes has guaranteed efficiency of dust collection and avoided fouling phenomenon.Liquid distributor is installed for the punching of tower wall, can install in system's running, dismantle, keeps in repair, and makes the operation maintenance convenient simple.The present invention can be used for the corollary equipment of newly constructed boiler room flue gas desulfurization and dedusting, and also can be used for old gallet water curtain dust collector increases the improvement project that desulfurizing function improves efficiency of dust collection.Particularly on old gallet water curtain dust collector desulfurization improvement project, adopt more economical and effective of this technology.
Be described in detail with reference to accompanying drawing below with reference to embodiments of the invention.
Description of drawings
The two circulation pocked stone pagoda desulfurating dust removing device for flue gas system schematic of Fig. 1;
Fig. 2 ring-type humidification atomizer schematic diagram;
Fig. 3 liquid distributor schematic diagram;
Fig. 4 Venturi tube and impingement baffles schematic diagram;
Fig. 5 demister schematic diagram.
The specific embodiment
Of the present invention pair of circulation pocked stone pagoda desulfurating dust removing device for flue gas includes: pocked stone pagoda main body, liquid distributor, grey water circulation system 12 and settling tank 11.Wherein: as shown in Figure 1, 2, the pocked stone pagoda main body is equipped with a ring-type humidification atomizer 1 near in the intake channel of bottom, and the shower nozzle 15 of this ring-type humidification atomizer is divided into two or more sets, every group relatively level be loaded on the sidewall of intake channel, the shower nozzle water outlet is vertical with flue gas flow direction.
Shown in Fig. 1,3, liquid distributor be the pocked stone pagoda main body near the top be uniformly distributed with along the circumference a plurality of, stretch to the liquid distributor 2 in the tower.Each liquid distributor all is loaded on Ta Bishang by the rubber ring sealing, and the liquid distributor center line faces toward the pocked stone pagoda center line, and downward-sloping.At the port of export of liquid distributor, also be connected with a fan-shaped prolate spout towards the tower wall.And the entrance point of each liquid distributor all is connected with grading ring pipe 3.Stifled for ease of fouling in the cleaning liquid distributor and ash, the liquid distributor center is inserted with a cleaning rod 16 that back-moving spring is arranged.
Shown in Fig. 1,4,5, the secondary desulfation dust-extraction device of being made up of the deflection plate demister 6 of a plurality of shower nozzles 7, Venturi tube 4, impingement baffles 5, annular array and alkali liquor circulating system 9 also is equipped with at the top of pocked stone pagoda main body.This device has one upper and lowerly to be the tank body 8 of open type.Be fixed with a supporting clapboard 13 by the bottom in the tank body, plate is provided with a plurality of circular holes, and correspondence is fixed the low speed Venturi tube that a flow velocity is a per second 15-20 rice on each hole, and above each Venturi tube, fixes a water conservancy diversion impingement baffles.Under the supporting clapboard corresponding Venturi tube position be provided with the resistance drop that communicates with alkali liquor pipe at 2 meter water columns with interior low-resistance shower nozzle.Also be coated with the coating that one deck is made up of waterglass and glass-cermic powder on the supporting clapboard surface.Also be fixed with an installing plate 17 by top in the tank body, also be provided with a plurality of circular holes on the plate, correspondence is fixed a top deflection plate 18 for the annular array of sealing demister on each hole.In the alkali liquor circulating system of this secondary desulfation dust-extraction device, alkali lye pumps into the low-resistance shower nozzle by alkali case 10 through alkali liquor pipe and alkali pump, sprays into the low speed Venturi tube, and the mixture of flue gas and alkali lye drop behind impingement baffles is removed down, and liquid flows back to the alkali case by leakage fluid dram 14.According to the pH value that returns liquid, alkali, moisturizing can be mended to the alkali pond by mending the alkali mouth and the mouth of a river by system.The flue dust in the alkali case and the sediment of product enter settling tank 11 by scum pipe.
The present invention in use, flue gas at first enters ring-type humidification atomizer from import, as shown in Figure 2, adopts the spray of shower nozzle side to install, flue gas does not directly wash away shower nozzle, so shower nozzle do not wear and tear, and does not produce the stifled phenomenon of ash.6-8 jet head sets is contained in outside installation the on the template, easy accessibility, be both sides during work to spray, water smoke covers whole flue cross section, can be according to dust concentration and flue gas load, opening one group or several groups works simultaneously, flue gas flow rate is controlled at about 15m/s, liquid-gas ratio 0.5-0.8, and the flue gas humidification is long, the humidification effect is better than venturi, but flue gas resistance is well below the venturi flue resistance.In this process, flue gas is with after the water smoke of ejection mixes, and water droplet is quickened by flue gas, be cooled at the accelerator flue gas, in the flue gas flue dust and drop bump, cohesion, granulation.
The flue gas that is cooled off by humidification carries water smoke and tangentially enters king-tower, and rotation is upwards flowed, and under action of centrifugal force, flue dust in the flue gas and drop rush at inwall and be captured, and forms evenly continuous liquid falling film for guaranteeing inner wall of tower, this device employing liquid distributor structure.As shown in Figure 3, recirculated water is distributed to liquid distributor after entering the grading ring pipe, and the liquid distributor front end is that a fan-shaped prolate spout sprays to inwall, and the liquid of a plurality of liquid distributor combination ejections forms continuous liquid film and can cover inwall, forms continuous liquid falling film.Liquid distributor is installed for punching, and liquid distributor and tower cinclides seal with rubber ring, mount and dismount very convenient.The effective lucite pipe of liquid distributor and grading ring connects, and it is convenient to observe, can be manually or automatic block clearing.Liquid distributor cloth liquid measure can increase and reduce the liquid distributor outlet pressure according to variation, use occasion, the change overflow pipe height of dust concentration, thereby changes thickness of liquid film, is suitable for different dust concentrations.
Flue gas after the dedusting enters low speed Venturi tube 4 and mixes upwards mobile with the alkali lye of low-resistance shower nozzle 7 ejections, under the effect of impingement baffles 5, turn to mobile, flue gas fully contacts with alkali lye in this process, sulfur dioxide is absorbed by alkali lye, micronic dust in the flue gas is further purified and has been strengthened the desulfurization and dedusting effect, plays the effect of primary dewatering.Flue gas is up behind impingement baffles, and the drop in the flue gas converges on the dividing plate, flows back to the alkali pond by leakage fluid dram.Because dustiness is few in the flue gas, so product purity height is convenient to recycle.Supporting clapboard is then separated dedusting circulation and desulphurization circulating.
Flue gas after the desulfurization upwards flows into the low-resistance demister.As shown in Figure 5, flue gas changes the flow direction after entering demister, flows out from horizontal direction, and the drop in the flue gas is captured by deflection plate, along compiling under the flap vertical current.This structural change the mode of traditional demister horizontal layout, change cellular structure into, on unit are, increase the girth of dehydration flap, be convenient to install, overhaul more convenient, because it is more thorough that deflection plate is vertically installed dehydration, avoided the flue gas reentrainment, than Plane Installation permissible velocity of flow height, saved the space, facility compact.
In the water circulation, the buck that flows out from the king-tower bottom enters settling tank 11, the flue dust precipitation, and supernatant pumps into liquid distributor by water circulating pump and ring-type humidification atomizer recycles.In the alkali lye circulation, alkali lye pumps into the low-resistance shower nozzle by NaOH solution circulating pump and sprays into the low speed Venturi tube, and the liquid under impingement baffles removes flows back to the alkali case by leakage fluid dram, and the flue dust in the alkali case and the sediment of product also enter settling tank by scum pipe.
Claims (5)
1 one kinds of two circulation pocked stone pagoda desulfurating dust removing device for flue gas comprise pocked stone pagoda main body, liquid distributor, grey water circulation system and settling tank, it is characterized in that said pocked stone pagoda main body near in the intake channel of bottom, is equipped with a ring-type humidification atomizer; Said liquid distributor be the pocked stone pagoda main body near the top be uniformly distributed with along the circumference a plurality of, stretch to the liquid distributor in the tower; Said dust arrester also is provided with a secondary desulfation dust-extraction device at the top of pocked stone pagoda main body, this secondary desulfation dust-extraction device has on one, it is down the tank body of open type, be fixed with a supporting clapboard by the bottom in the tank body, plate is provided with a plurality of circular holes, correspondence is fixed a Venturi tube on each hole, and above each Venturi tube, fix a water conservancy diversion impingement baffles, corresponding Venturi tube position is provided with the shower nozzle that communicates with alkali liquor pipe under the supporting clapboard, also be fixed with an installing plate by top in the tank body, also be provided with a plurality of circular holes on the plate, correspondence is fixed a top deflection plate for the annular array of sealing demister on each hole; In the alkali liquor circulating system of this secondary desulfation dust-extraction device, alkali lye pumps into the low-resistance shower nozzle by the alkali case through alkali liquor pipe and alkali pump, spray into the low speed Venturi tube, the mixture of flue gas and alkali lye drop behind impingement baffles is removed down, liquid flows back to the alkali case via leakage fluid dram, the flue dust in the alkali case and the sediment of product enter settling tank by scum pipe, also are respectively equipped with on the alkali case to mend alkali mouth and water supplement port.
2 according to the described dust arrester of claim 1, it is characterized in that the shower nozzle of said ring-type humidification atomizer is divided into two or more sets, and level is loaded on the sidewall of intake channel relatively, and is vertical with flue gas flow direction.
3 according to the described dust arrester of claim 1, it is characterized in that said liquid distributor is loaded on Ta Bishang by the rubber ring sealing, and the liquid distributor center line faces toward the pocked stone pagoda center line, and downward-sloping; At the port of export of liquid distributor, also be connected with a fan-shaped prolate spout towards the tower wall; And the entrance point of each liquid distributor all is connected with the grading ring pipe.
4 according to claim 1 or 3 described dust arresters, it is characterized in that said liquid distributor center is inserted with a cleaning rod that back-moving spring is arranged.
5 according to the described dust arrester of claim 1, it is characterized in that said Venturi tube is that flow velocity is the low speed Venturi tube of per second 15-20 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106960 CN1242840C (en) | 2003-11-10 | 2003-11-10 | Dual cycle pocked stone pagoda stack gas desulfurizing and dedusting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106960 CN1242840C (en) | 2003-11-10 | 2003-11-10 | Dual cycle pocked stone pagoda stack gas desulfurizing and dedusting apparatus |
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| CN1544128A CN1544128A (en) | 2004-11-10 |
| CN1242840C true CN1242840C (en) | 2006-02-22 |
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| CN 200310106960 Expired - Fee Related CN1242840C (en) | 2003-11-10 | 2003-11-10 | Dual cycle pocked stone pagoda stack gas desulfurizing and dedusting apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254398B (en) * | 2007-12-14 | 2010-06-09 | 天津理工大学 | Double circulation desulfurating dust removing device for flue gas |
| CN101716463B (en) * | 2010-01-05 | 2012-07-04 | 浙江大学 | Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method |
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| CN101732972B (en) * | 2010-01-27 | 2012-05-23 | 天津理工大学 | Dual-liquid level jet bubbling pipe |
| CN105879653A (en) * | 2014-12-12 | 2016-08-24 | 安徽盛运环保工程有限公司 | Impact material-returning type flue reactor |
| CN109876575B (en) * | 2019-02-11 | 2024-08-09 | 深圳国技仪器有限公司 | Smoke filter and smoke and dust sampling equipment |
| CN109731443A (en) * | 2019-03-18 | 2019-05-10 | 上海超高环保科技股份有限公司 | Administer the used oil spray equipment and preparation method thereof of volatile organic matter |
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2003
- 2003-11-10 CN CN 200310106960 patent/CN1242840C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254398B (en) * | 2007-12-14 | 2010-06-09 | 天津理工大学 | Double circulation desulfurating dust removing device for flue gas |
| CN101716463B (en) * | 2010-01-05 | 2012-07-04 | 浙江大学 | Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method |
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| Publication number | Publication date |
|---|---|
| CN1544128A (en) | 2004-11-10 |
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Granted publication date: 20060222 Termination date: 20101110 |