CN202683052U - Front semi-dry gas desulfurization system - Google Patents

Front semi-dry gas desulfurization system Download PDF

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Publication number
CN202683052U
CN202683052U CN 201220303611 CN201220303611U CN202683052U CN 202683052 U CN202683052 U CN 202683052U CN 201220303611 CN201220303611 CN 201220303611 CN 201220303611 U CN201220303611 U CN 201220303611U CN 202683052 U CN202683052 U CN 202683052U
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China
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port
export
dust pelletizing
cyclone separator
desulfurizing tower
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CN 201220303611
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Chinese (zh)
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高晓峰
高晓东
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无锡高达环境科技有限公司
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Priority to CN 201220303611 priority Critical patent/CN202683052U/en
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Abstract

The utility model discloses a front semi-dry gas desulfurization system which comprises a desulfurization system, a dust removal system and an exhaust system, wherein the desulfurization system is arranged on the front end of the dust removal system, the desulfurization system comprises a desulfurization tower, a cyclone separator and a recycling material box; the inlet end of the desulfurization tower is connected with a flue which is not subjected to dust removal, the outlet end of the desulfurization tower is connected with the inlet end of the cyclone separator, the first outlet end of the cyclone separator is connected with the dust removal system, the dust removal system is connected with the exhaust system, the second outlet end of the cyclone separator is connected with the inlet end of the recycling material box, the outlet end of the recycling material box is communicated with the desulfurization tower, and a spraying device used for spraying a desulfurizing agent into the desulfurization tower is arranged on the desulfurization tower. The desulfurization system is connected with the flue which is not subjected to dust removal, smoke is desulfurized before dust removal, thus the dust removal condition of the dust removal system is improved; and only a primary dust removal system is arranged on the whole system, thus one-time building cost is lowered, and operation cost of the front semi-dry gas desulfurization system is greatly reduced.

Description

The forward type semi-dry desulphurization system

Technical field

The utility model relates to a kind of industrial waste gas desulphurization system, relates in particular to a kind of forward type semi-dry desulphurization system.

Background technology

Flue gas desulfurization (being called for short FGD) refers to remove oxysulfide (SO from boiler flue or other industrial waste gases 2And SO 3).Semidry method FGD technology refers to desulfurizing agent desulfurization under drying regime, regeneration under wet condition (such as washing regenerating active carbon flow process), perhaps desulfurization under wet condition, processes the flue gas desulfurization technique of desulfurization product (such as spray drying process) under dried state.Particularly desulfurization under wet condition, under dried state, process the semidry method of desulfurization product, with its advantage that existing wet desulphurization reaction speed is fast, desulfuration efficiency is high, have again dry method without the sewage spent acid discharge, the easy-to-handle advantage of desulfurization afterproduct and be subject to people and pay close attention to widely.

As shown in Figure 1, traditional sweetening process: flue gas enters electric cleaner by boiler, and to separate flying dust and dust, the flue gas after the dedusting enters desulfurizing tower and carries out desulfurization, and the flue gas after the desulfurization enters the sack cleaner dedusting again, is discharged through chimney by induced draught system at last.This shows, this system is provided with the two-stage dedusting, during practical operation, the outlet of first order electric cleaner needs that also blower fan is set flue gas is blowed to desulfurizing tower, second level sack cleaner outlet arranges induced draught system, flue gas is blowed to chimney, the once input when having increased so undoubtedly this system Construction, and system is tediously long, complicated, makes troubles also for maintenance and maintenance.

The utility model content

The purpose of this utility model is to solve the problems of the technologies described above, a kind of forward type semi-dry desulphurization system is provided, be installed on dust pelletizing system with respect to traditional desulphurization system postposition, secondary dust collecting system and corresponding induced draught system need to be set after desulphurization system, the utility model need not to set up secondary dust collecting system with the preposition dust pelletizing system that is installed on of desulphurization system, the once input when having saved system Construction, and the desulphurization system compact conformation, desulfurized effect is obvious.

For reaching this purpose, the utility model by the following technical solutions:

A kind of forward type semi-dry desulphurization system, comprise: desulphurization system, dust pelletizing system, gas extraction system, desulphurization system is installed on the front end of dust pelletizing system, described desulphurization system comprises desulfurizing tower, cyclone separator, the recirculation hopper, the arrival end of described desulfurizing tower is connected with exhaust gases passes without dedusting, the port of export of described desulfurizing tower is connected with the arrival end of described cyclone separator, first port of export of described cyclone separator is connected with dust pelletizing system, described dust pelletizing system is connected with described gas extraction system again, second port of export of described cyclone separator is connected with the arrival end of described recirculation hopper, the port of export of described recirculation hopper is communicated with described desulfurizing tower, is equiped with on the described desulfurizing tower for the injection apparatus that sprays desulfurizing agent in desulfurizing tower.

Further, described desulfurizing tower comprises import bend loss, venturi pipeline section, the section of rising that sequentially connects, and described import bend loss is connected with flue, and the described section of rising is connected with described cyclone separator.

Further, extend a bye-pass on the connecting line between described cyclone separator and the described dust pelletizing system, described bye-pass connects activated carbon system.

Further, described gas extraction system comprises air-introduced machine, chimney, the arrival end of described air-introduced machine is connected with first port of export of described dust pelletizing system, the port of export of described air-introduced machine is communicated with described chimney, and second port of export connection one of described dust pelletizing system is used for the dust that dust pelletizing system is caught is delivered to the byproduct system of warehouse or slag treatment system.

Preferably, the inside of described import bend loss is provided with for the guide vane of regulating flue gas flow direction.

Further, described injection apparatus is installed in described venturi pipeline section place, and the first end of described injection apparatus extends into the inside of described venturi pipeline section, and the second end of described injection apparatus connects the desulfurizing agent preparation system.

Further, first port of export of described recirculation hopper is communicated with the described section of rising, and second port of export connection one of described recirculation hopper is delivered to the byproduct system of warehouse or slag treatment system for the product that will recycle hopper.

Further, the second end of described injection apparatus also connects water pot and compressed air source.

Preferably, described dust pelletizing system adopts sack cleaner or electrostatic precipitator.

Compared to existing technology, the beneficial effects of the utility model:

1, by the preposition dust pelletizing system that is installed on of desulphurization system, not only improved the dedusting condition of dust pelletizing system, the suffered corrosion meeting of dust pelletizing system is obviously reduced, and desulphurization system directly is connected with exhaust gases passes without dedusting, flue gas at first passes through desulfurization, carry out again dedusting after the desulfurization, only need primary dust removing system and induced draught system, with respect to the rearmounted installation of traditional desulphurization system multistage dedusting and induced draught system need to be set, reduced construction cost one time, and significantly reduced the operating cost of semi-dry desulphurization system, remarkable in economical benefits;

2, desulfurizing tower mainly is comprised of the import bend loss, venturi pipeline section, the section of rising that sequentially connect, at the venturi pipeline section injection apparatus is set, with desulfurizing agent, water, the air Injection section of rising, desulfurizing agent and flue gas react in the section of rising, the oxysulfide in the flue gas can be reduced to desired 100 milligrams of every marks vertical in;

3, the circulatory system that is comprised of desulfurizing tower, cyclone separator, recirculation hopper can make desulfurizing agent obtain the most efficient recycling, and also so that the whole system characteristics of compact layout, floor space is few;

4, by inject more water in desulfurizing tower, further cooled flue gas reduces flue-gas temperature, so that flue gas and desulfurizing agent fully react, also can reduce the exhaust gas volumn that enters dust pelletizing system, because the minimizing of flue gas volume, the dust discharge amount after the dust pelletizing system dedusting can further reduce;

5, by between cyclone separator and dust pelletizing system, accessing activated carbon system, can further absorb mercury, dioxide and other tiny pollutants, pollutant is absorbed and is deposited on carbon surface, enters dust pelletizing system and removes.

Description of drawings

Fig. 1 is the flow chart of existing desulphurization system;

Fig. 2 is the flow chart of the described forward type semi-dry desulphurization system of embodiment.

Among the figure:

1, desulfurizing tower; 101, import bend loss; 102, venturi pipeline section; 103, the section of rising; 2, cyclone separator; 3, recirculation hopper; 4, electrostatic precipitator; 5, air-introduced machine; 6, chimney; 7, byproduct system; 8 activated carbon system; 9, compressed air source; 10, slurries mixing pit; 11, water pot; 12, lime accumulator tank; 13, spray gun.

The specific embodiment

Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by the specific embodiment.

As shown in Figure 2, in the present embodiment, forward type semi-dry desulphurization system described in the utility model comprises: desulphurization system, dust pelletizing system, gas extraction system, and the preposition dust pelletizing system that is installed on of desulphurization system, gas extraction system is installed on the rear end of dust pelletizing system.

Desulphurization system comprises desulfurizing tower 1, cyclone separator 2, recirculation hopper 3, the arrival end of desulfurizing tower 1 is connected with flue without dedusting, the port of export of desulfurizing tower 1 is connected with the arrival end of cyclone separator 2, first port of export of cyclone separator 2 is connected with dust pelletizing system, dust pelletizing system is connected with gas extraction system again, second port of export of cyclone separator 2 is connected with the arrival end of recirculation hopper 3, the port of export of recirculation hopper 3 is communicated with desulfurizing tower 1, is equiped with on the desulfurizing tower 1 for the injection apparatus that sprays desulfurizing agent in desulfurizing tower.

Dust pelletizing system adopts electrostatic precipitator 4, and the selection of deduster can require to determine according to composition and the purification of flue gas, also can adopt sack cleaner in other embodiments.

Gas extraction system comprises air-introduced machine 5, chimney 6, and the arrival end of air-introduced machine 5 is connected with the port of export of dust pelletizing system, and the port of export of air-introduced machine 5 is communicated with chimney 6.

More specifically, desulfurizing tower 1 comprises import bend loss 101, venturi pipeline section 102, the section of rising 103 that sequentially connects, flue is connected with import bend loss 101, and the venturi pipeline section 102 that is linked in sequence again, the section of rising 103, the section of rising 103 are connected with the arrival end of cyclone separator 2 again; First port of export of cyclone separator 2 is connected with the arrival end of electrostatic precipitator 4, second port of export of cyclone separator 2 is connected with the arrival end of recirculation hopper 3, first port of export of recirculation hopper 3 is communicated with the section of rising 103, and second port of export of recirculation hopper 3 is connected with byproduct system 7; First port of export of electrostatic precipitator 4 is connected with the arrival end of air-introduced machine 5, and the port of export of air-introduced machine 5 is communicated with chimney 6; Second port of export of electrostatic precipitator 4 is connected with byproduct system 7.

Injection apparatus comprises spray gun 13, the first end of spray gun 13 extends into the inside of venturi pipeline section, the second end of spray gun 13 connects desulfurizing agent lime white preparation system, water pot 11, compressed air source 9, and the first end of spray gun 13 adopt can be simultaneously to the two-way fluid injector of the section of rising injected water and lime white.

Above-mentioned lime white preparation system comprises lime slaking device, lime accumulator tank 12, adds water by the lime stone from lime accumulator tank 12 and make in the lime slaking device, and its reaction mechanism is as follows: CaO+H 2O=Ca (OH) 2+ heat, lime slaking carries out in two steps: be lime slaking that solids content is 40% dope at first, then be to be 20% thin pulp with its dilution for solids content, temperature during lime slaking will reach 90 ℃~95 ℃, lime white enters slurries mixing pit 10 from ager, is squeezed into the desulfurizing tower by dosing pump from slurries mixing pit 10 again.

The forward type semi-dry desulfurizing process comprises the steps: to enter import bend loss 101 without the flue gas of dedusting from flue, enter again venturi pipeline section 102, by the inside at the import bend loss guide vane is set, can regulate flue gas flow direction, make the smoke distribution that enters venturi pipeline section 102 even, venturi pipeline section 102 places narrow down its cross section for the linear velocity that increases flue gas and solid matter, when guaranteeing that flue gas enters the section of rising 103 by venturi pipeline section 102, solid matter produces a fluid bed in the section of rising 103; The spray gun 13 that is arranged on simultaneously venturi pipeline section 102 places injects the section of rising 103 by nozzle with new lime white and water, fully contact with flue gas at the section of rising 103 lime, and with flue gas in acid constituents generation neutralization reaction, utilize flue gas suspension desulfur technology, can make the coal dust ash of high concentration, dust, lime forms the accumulation of Cmax in desulfurizing tower, its concentration is 50~100 times of traditional desulfurizing tower under normal circumstances, because lime stone and flue gas reaction surface in fluid bed are large, contact fully, thereby the removal degree of acid is very high, content of sulfur dioxide after processing in the flue gas can be reduced to desired 100 milligrams of every marks vertical in, its reaction mechanism is as follows:

2HCl+Ca(OH) 2=CaCl 2+2H 2O;

2HF+Ca(OH) 2=CaF 2+2H 2O;

SO 2+Ca(OH) 2=CaSO 3+H 2O;

CaSO 3+ 1/ 2O 2=CaSO 4

Flow velocity at the section of rising 103 flue gases is very high, solid particle is transported to the top exit of the section of rising 103 by flue gas, and then enter cyclone separator 2, separated at cyclone separator 2 interior most of particles, approximately 99% flue gas particle is captured, and only seldom particle is carried by flue gas and is delivered to electrostatic precipitator 4, and absorbed particle returns in the desulfurizing tower 1 by recirculation hopper 3, make the desulfurizing agent lime white obtain utilizing the most efficiently, thereby make the total amount of lime reduce to minimum; The flue gas that contains a small amount of solid particle causes electrostatic precipitator 4 from cyclone separator 2, and after electrostatic precipitator 4 dedustings, air-introduced machine 5 is discharged flue gas by chimney 6.The effect of air-introduced machine is: keep the inner required stress level of desulfurizing tower; Overcome the pressure drop of locating to produce at flue, desulfurizing tower, deduster etc.

Inject further cooled flue gas of more water by spray gun 13 to the section of rising 103, reach the temperature purpose of control flue gas.In desulphurization system, flue-gas temperature control is very important, and reason has and is two aspects: one, lime stone absorbs the sour branch in flue gas the inside and improves with the reduction of flue-gas temperature; Two, crossing low flue-gas temperature can make the desulfurizing tower the inside recycled material trend of cohering increase.

In order further to absorb mercury, dioxide and other tiny pollutants, connecting pipe between cyclone separator 2 and electrostatic precipitator 4 is extended a bye-pass, bye-pass connects activated carbon system 8, activated carbon injects flue gas to bring deduster into, mercury and dioxide are absorbed and are deposited on carbon surface, enter deduster by static.

Second port of export of recirculation hopper 3, second port of export of electrostatic precipitator 4 all link to each other with byproduct system 7, being delivered to warehouse or slag treatment system by the product of recirculation hopper discharge, the dust of being caught by deduster, because the factors such as the compact conformation of this cleaning system, absorption efficiency height, so that lime consumption is less, thereby its residue will lack than the General Evolution system; The expense of simultaneously this system maintenance is also more much lower than general gas purge system, because wherein only having few moving component, therefore wearing and tearing are few, nozzle structure is simple and be static, so this desulphurization system not only has an economic benefit, and environmental benefit is arranged.

Know-why of the present utility model has below been described in conjunction with specific embodiments.These are described just in order to explain principle of the present utility model, and can not be interpreted as by any way the restriction to the utility model protection domain.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other specific embodiment of the present utility model, and these modes all will fall within the protection domain of the present utility model.

Claims (9)

1. forward type semi-dry desulphurization system, it is characterized in that, comprise: desulphurization system, dust pelletizing system, gas extraction system, desulphurization system is installed on the front end of dust pelletizing system, described desulphurization system comprises desulfurizing tower, cyclone separator, the recirculation hopper, the arrival end of described desulfurizing tower is connected with exhaust gases passes without dedusting, the port of export of described desulfurizing tower is connected with the arrival end of described cyclone separator, first port of export of described cyclone separator is connected with dust pelletizing system, described dust pelletizing system is connected with described gas extraction system again, second port of export of described cyclone separator is connected with the arrival end of described recirculation hopper, the port of export of described recirculation hopper is communicated with described desulfurizing tower, is equiped with on the described desulfurizing tower for the injection apparatus that sprays desulfurizing agent in desulfurizing tower.
2. forward type semi-dry desulphurization system according to claim 1, it is characterized in that, described desulfurizing tower comprises import bend loss, venturi pipeline section, the section of rising that sequentially connects, and described import bend loss is connected with flue, and the described section of rising is connected with described cyclone separator.
3. forward type semi-dry desulphurization system according to claim 1 is characterized in that, extends a bye-pass on the connecting line between described cyclone separator and the described dust pelletizing system, and described bye-pass connects activated carbon system.
4. forward type semi-dry desulphurization system according to claim 1, it is characterized in that, described gas extraction system comprises air-introduced machine, chimney, the arrival end of described air-introduced machine is connected with first port of export of described dust pelletizing system, the port of export of described air-introduced machine is communicated with described chimney, and second port of export connection one of described dust pelletizing system is used for the dust that dust pelletizing system is caught is delivered to the byproduct system of warehouse or slag treatment system.
5. forward type semi-dry desulphurization system according to claim 2 is characterized in that, the inside of described import bend loss is provided with for the guide vane of regulating flue gas flow direction.
6. forward type semi-dry desulphurization system according to claim 2, it is characterized in that, described injection apparatus is installed in described venturi pipeline section place, and the first end of described injection apparatus extends into the inside of described venturi pipeline section, and the second end of described injection apparatus connects the desulfurizing agent preparation system.
7. forward type semi-dry desulphurization system according to claim 2, it is characterized in that, first port of export of described recirculation hopper is communicated with the described section of rising, and second port of export connection one of described recirculation hopper is delivered to the byproduct system of warehouse or slag treatment system for the product that will recycle hopper.
8. forward type semi-dry desulphurization system according to claim 6 is characterized in that, the second end of described injection apparatus also connects water pot and compressed air source.
9. each described forward type semi-dry desulphurization system is characterized in that according to claim 1~8, and described dust pelletizing system adopts sack cleaner or electrostatic precipitator.
CN 201220303611 2012-06-26 2012-06-26 Front semi-dry gas desulfurization system CN202683052U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102716658A (en) * 2012-06-26 2012-10-10 无锡高达环境科技有限公司 Front semidry desulphurization system and desulphurization technology
CN103968403A (en) * 2014-04-04 2014-08-06 彭维明 Device and method for efficiently purifying smoke of coal-fired power plant
CN103994455A (en) * 2014-04-04 2014-08-20 彭维明 System and method for efficiently removing dust in flue gas of coal-fired power plant
CN105854501A (en) * 2016-04-28 2016-08-17 安徽工业大学 Emission reduction system for fine particles in sintering process of iron ore
CN106731286A (en) * 2016-11-23 2017-05-31 无锡市国松环保机械有限公司 Integration dust-removing desulphurization system
CN107029531A (en) * 2017-05-12 2017-08-11 安徽晨晰洁净科技有限公司 The desulfurization of industrial smoke, dedusting denitrification integral handling process

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102716658A (en) * 2012-06-26 2012-10-10 无锡高达环境科技有限公司 Front semidry desulphurization system and desulphurization technology
CN103968403A (en) * 2014-04-04 2014-08-06 彭维明 Device and method for efficiently purifying smoke of coal-fired power plant
CN103994455A (en) * 2014-04-04 2014-08-20 彭维明 System and method for efficiently removing dust in flue gas of coal-fired power plant
CN105854501A (en) * 2016-04-28 2016-08-17 安徽工业大学 Emission reduction system for fine particles in sintering process of iron ore
CN105854501B (en) * 2016-04-28 2018-02-02 安徽工业大学 A kind of emission-reducing system of Ore Sintering Process fine particle
CN106731286A (en) * 2016-11-23 2017-05-31 无锡市国松环保机械有限公司 Integration dust-removing desulphurization system
CN107029531A (en) * 2017-05-12 2017-08-11 安徽晨晰洁净科技有限公司 The desulfurization of industrial smoke, dedusting denitrification integral handling process

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