CN201384927Y - Flue gas desulphurization device of circulating fluidized bed - Google Patents
Flue gas desulphurization device of circulating fluidized bed Download PDFInfo
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- CN201384927Y CN201384927Y CN200920126285U CN200920126285U CN201384927Y CN 201384927 Y CN201384927 Y CN 201384927Y CN 200920126285 U CN200920126285 U CN 200920126285U CN 200920126285 U CN200920126285 U CN 200920126285U CN 201384927 Y CN201384927 Y CN 201384927Y
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- flue gas
- fresh water
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- desulfurizing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model belongs to the chemical technical field, and relates to the flue gas desulphurization purification technology, in particular to a flue gas desulphurization device of a circulating fluidized bed. The flue gas desulphurization device mainly comprises a Venturi tube, a desulphurization tower diffuser cone, process water nozzles, a desulphurization tower, a dust collector, an ash return hopper and ash return pipes, wherein 1-8 process water nozzles of the same type are arranged on the desulphurization tower diffuser cone, and each ash return pipe of each process water nozzle is equipped with a process water regulating valve. The flue gas desulphurization device expands a regulating range of process water injected into the desulphurization tower, increases adaptability thereof to flue gas temperature at an inlet, guarantees long-term, safe and stable operation thereof, and is adaptable to the flue gas desulphurization fields of steel ferrous metallurgy, power industry, petrochemical engineering, waste incineration and the like.
Description
Technical field
The utility model belongs to technical field of chemistry, relates to a kind of flue gas desulfurization purification techniques, particularly a kind of circulating fluid bed flue-gas desulfurizing device.
Technical background
Desulfurizing agent (Ca (OH)
2) SO of powdered granule in flue gas
2React, and form calcium sulfite on the desulfurizing agent surface.Desulfurizing agent and SO in flue gas
2Reaction be gas-solid reaction, its reaction speed is extremely low, and, form the Ca (OH) that calcium sulfite can intercept sorbent particle inside on desulfurizing agent surface
2Continue and SO
2React, therefore, need in desulfurizing tower, spray into atomized water, water smoke is dripped with sorbent particle combine, and form the moisture film of the several nanometer thickness of one deck on the sorbent particle surface, make SO
2To the water film surface diffusion,, thereby accelerate desulphurization reaction speed with the desulfurizing agent generation ionic reaction of dissolving in the moisture film; Simultaneously, water can make the calcium sulfite crystallization and the growth of continuous generation, and the calcium sulfite crystal grain of growing up can be in desulfurizing tower comes off in the continuous collision of desulfurizing agent solid particle and exposes new desulfurizing agent surface, continues to participate in desulphurization reaction.
Flue gas sprays into the formation turbulent flow at a high speed from desulfurizing tower bottom centre Venturi tube, and desulfurizing agent is carried, mixes and participate in reaction by flue gas, and at this moment, desulfurizing agent is the fluidisation attitude in desulfurization.Because flue gas is shorter at the desulfurization dwell time in the tower, desulfurizing agent can not utilize by disposable quilt fully, needs to introduce the profit that ciculation fluidized bed process improves whole system, and therefore, this technology is called circulating fluid bed flue gas desulfurization technique.
A) its main technique flow process is:
1) flue gas enters desulfurizing tower from the desulfurizing tower inlet after Venturi tube quickens, and sprays into desulfurizing agent, circulating ash and fresh water (FW) respectively on desulfurizing tower diffusion cone, fully mixes, reacts with flue gas in tower, and the pollutant in the flue gas is removed; The flue gas that carries a large amount of solid particles that comes out from desulfurizing tower carries out gas solid separation in cloth bag () deduster, the flue gas that reaches discharge standard enters atmosphere through air-introduced machine and chimney.
2) solid particle that separates falls into back in the ash bucket, the ash returning tube bottom of returning ash bucket and being connected with desulfurizing tower is provided with fluid-bed, fluid-bed is put the slope to the desulfurizing tower direction, compressed air makes back solid particle fluidisation in ash bucket and the ash returning tube through air fluidisation skewed slot, and flows into desulfurizing tower under the effect of gravity.
B) the present problem that exists of circulating fluid bed flue-gas desulfurizing device:
Have the desulfurizer that single fresh water (FW) nozzle is promptly arranged in the circulating fluid bed flue-gas desulfurizing device now, the desulfurizer of a plurality of fresh water (FW) nozzles is also arranged.
When a) desulfurizer adopted single fresh water (FW) nozzle, nozzle generally was arranged on the desulfurizing tower diffusion awl, and its subject matter that mainly exists is:
1) water, desulfurizing agent and circulating ash etc. spray into desulfurizing tower respectively, single fresh water (FW) nozzle can not make desulfurizing agent in the atomized water that sprays in the desulfurizing tower and the flue gas and circulating ash particle rapid, fully mix.Atomized water more by smoke evaporative before touching the desulfurizing agent solid particle, the water yield is less when the desulfurizing agent solid particles surface forms moisture film, and wet particle is very fast by evaporate to dryness in flue gas.This kind situation makes the SO in the flue gas
2It is shorter that infiltration and desulfurizing agent dissolve in time of moisture film in moisture film, and the effective reaction time of desulfurizing agent solid particle in tower is shorter, causes the interior general reaction efficient of desulfurizing tower not high.
2) desulfurizer is relatively poor to its entrance flue gas temperature adaptive capacity.In the engineering practical application, single fresh water (FW) nozzle practical adjustments scope the maximum spout water yield 50～100% between.When entrance flue gas temperature was on the low side, the fresh water (FW) nozzle put into operation, the water yield that will cause the water yield that in tower, sprays into can evaporate greater than flue gas, and desulfurizing tower outlet flue gas contains aqueous water, and the safe operation of follow-up equipment is impacted.If the fresh water (FW) nozzle is stopped transport, then the desulphurization reaction in the desulfurizing tower all is a gas-solid reaction, can't satisfy emission request.
When b) desulfurizer adopted a plurality of fresh water (FW) nozzle, nozzle generally was arranged on the desulfurizing barrel sidewall and has part to stretch into desulfurizing tower inside, and its subject matter that mainly exists is:
1) flue gas sprays into from desulfurizing tower bottom centre and forms a center flow velocity height, the low velocity field of flow velocity on every side, the fresh water (FW) arrangement of nozzles is on the desulfurizing barrel sidewall, the atomized water that sprays into is most of can to descend along with the solid particulate matter of periphery, and make the desulfurizing agent at center, flow field can't participate in desulphurization reaction because of there not being atomized water, and, because the solid particulate matter that the desulfurizing barrel periphery descends is few, evaporation completely, the atomized water of minor diameter takes desulfurizing tower out of with air-flow can to make part, and follow-up equipment such as dedusting are caused damage.
2) because returning the material circulation, circulation of desulfurizing tower solid particles inside thing and deduster make flue gas when Venturi tube sprays, can carry a large amount of solid particles, under the environment of this high dust, high stream, stretch into the fresh water (FW) nozzle of desulfurizing tower inside and the situation that pipeline can cause fluctuation of service because of the abrasion problem thereof, accidents such as the material or the bed that collapses then can appear leaking in the leakage phenomenon if rubbing appears in nozzle and pipeline thereof.
Summary of the invention
The objective of the invention is to improve the deficiencies in the prior art, a kind of circulating fluid bed flue-gas desulfurizing device is provided.Particularity according to circulating fluid bed flue-gas desulfurizing device desulfurizing tower structure and Flow Field Distribution thereof, the multiinjector technology is applied in the desulfurizing tower, atomized water is mixed rapidly with desulfurizing agent, increase the desulfurizing agent highly effective reaction time, thereby improve desulfuration efficiency and sorbent utilization; Simultaneously, the fresh water (FW) nozzle by can independent regulation, the mode of start and stop disposes, and enlarged the accommodation of desulfurizer to its entrance flue gas temperature, prolongs putting into operation the time of desulfurizer.
The utility model is achieved through the following technical solutions:
1) flue gas sprays in the desulfurizing tower from desulfurizing tower bottom centre after Venturi tube quickens.
2) desulfurizing agent sprays into from the desulfurizing agent interface of desulfurizing tower diffusion cone sidewall.
3) on desulfurizing tower diffusion cone, by multilayer, 1～8 every layer arrangement technology water interface; The fresh water (FW) nozzle is installed in on one deck, and other layer uses when nozzle is adjusted the installation site.Fresh water (FW) sprays into desulfurizing tower after nozzle atomization, contact with the circulating ash particle that returns with the sorbent particle of high concentration at Ta Nei, make these particle adhesion process water form wet granular, in strong mixed process, the reaction that desulfurizing agent and flue gas take place becomes ionic reaction by gas-solid reaction.Simultaneously, wet granular is heated by flue gas, and the water on wet granular surface is vaporized, and forms dried particle.In the violent process of mixing and constantly circulating, constantly to grow up and come off at the calcium sulfite crystal grain that particle surface generates, unreacted desulfurizing agent is exposed to the particle section that breaks, and desulphurization reaction takes place once more.The position of fresh water (FW) nozzle is mixing the atomized water that sprays in the tower rapidly with the solid particle that contains desulfurizing agent; the solid particle amount of effectively participating in reaction in the tower increases, the desulphurization reaction time lengthening; improve the utilization rate of desulfurization, thereby reached the purpose that reduces doctor solution consumption, improves desulfuration efficiency.
4) adopt the fresh water (FW) nozzle of a plurality of same model, a fresh water (FW) nozzle is connected with a technology water pump separately, and perhaps 1～8 fresh water (FW) nozzle passes through the fresh water (FW) pipeline and is connected with a technology water pump, and each fresh water (FW) nozzle can independent start and stop, adjusting.When entrance flue gas temperature or flue gas flow are reduced to the single injector recirculating fluidized bed can't move the time, by turning down or closed portion fresh water (FW) nozzle, expansion can steady in a long-term move desulfurizer to going into the adjustable range of the tower water yield, prolongs putting into operation the time of desulfurizer.
5) motor of technology water pump adopts variable-frequency motor, and pressure monitoring device is arranged on the pump discharge pipeline, by control fresh water (FW) pump discharge water pressure, guarantees that the fresh water (FW) nozzle sprays into the atomizing effect of fresh water (FW) in desulfurizing tower.On each fresh water (FW) nozzle outlet conduit the fresh water (FW) control valve is set, guarantees that each fresh water (FW) nozzle can independently carry out Flow-rate adjustment.
6) fresh water (FW) nozzle and fresh water (FW) pipeline adopt flexible pipe to be connected, hose length so that the installation of fresh water (FW) nozzle, debugging and replacing be as the criterion.
7) desulfurizing tower is connected with deduster, guarantees that the dust contained flue gas concentration that enters atmosphere reaches discharge standard.The deduster bottom with loop back ash bucket and be connected, the circulating ash that deduster separates is stored in and loops back in the ash bucket, loop back the ash bucket bottom and slope down to the desulfurizing tower direction, and fluid-bed is set in the bottom, it is mobile that circulating ash can be suspended, and under the effect of gravity, be back to desulfurizing tower smoothly, and make the desulfurizing agent that does not use fully continue to participate in reaction, improve sorbent utilization.
Desulfurizing agent distribution situation in the utility model desulfurizing tower in the flue gas is provided with 1～8 fresh water (FW) nozzle, makes the fresh water (FW) that sprays into can be fully mix fast reaction speed, raising reaction efficiency, reduction doctor solution consumption with flue gas and desulfurizing agent in the tower.The fresh water (FW) nozzle adopts same model, and each fresh water (FW) nozzle can be regulated separately, has enlarged the adjustable range of desulfurizing tower injection flow rate, and controls flexibly, easy to operate, can significantly improve sorbent utilization and desulfuration efficiency, prolongs putting into operation the time of desulfurizer.The utility model is applicable to flue gas desulfurization fields such as Ferrous Metallurgy, power industry, petrochemical industry, waste incineration.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the distribution schematic diagram of fresh water (FW) nozzle
Among the figure: part 1 is a smoke inlet; Part 2 is a Venturi tube; Part 3 is the desulfurizing agent interface; Part 4 is a flexible pipe; Part 5 fresh water (FW) nozzles; Part 6 is the fresh water (FW) interface; Part 7 is a desulfurizing tower; Part 8 is a deduster; Part 9 is for looping back ash bucket; Part 10 is a fluid-bed; Part 11 is for looping back ash pipe; Part 12 is the circulating ash interface; Part 13 is the fresh water (FW) control valve; Part 14 is the technology water pump; Part 15 is a pressure monitoring device; Part 16 desulfurizing tower diffusion cones.
The specific embodiment
The utility model will be further described below in conjunction with accompanying drawing.
Flue gas enters this desulfurizer from smoke inlet 1, sprays into desulfurizing tower 7 at a high speed from desulfurizing tower bottom centre after Venturi tube 2 quickens.Strength carries desulfurizing agent to spray into desulfurizing tower 7 from the desulfurizing agent interface 3 of desulfurizing tower diffusion cone 16 sidewalls.The circulating ash that deduster 8 separates is stored in and loops back in the ash bucket 9, and the fluid-bed 10 that is provided with in the bottom, it is mobile that circulating ash can be suspended, and is back to desulfurizing tower 7 under the effect of gravity smoothly, make the desulfurizing agent that does not use fully continue to participate in reaction, improve sorbent utilization.The motor of technology water pump 14 adopts variable-frequency motor, and pressure monitoring device 15 is arranged on the pump discharge pipeline, by control technology water pump 14 outlet water pressures, guarantees that the fresh water (FW) nozzle sprays into the atomizing effect of fresh water (FW) in desulfurizing tower.Flue gas after the dedusting enters atmosphere through chimney, and the dust contained flue gas concentration that enters atmosphere reaches discharge standard.
Fresh water (FW) nozzle 5 adopts same model, on each fresh water (FW) nozzle 5 outlet conduit fresh water (FW) control valve 13 is set, and guarantees that each fresh water (FW) nozzle 5 can independently carry out Flow-rate adjustment.
The utility model has enlarged the adjustable range that sprays into the desulfurizing tower fresh water (FW), has strengthened the adaptability of circulating fluid bed flue-gas desulfurizing device to inlet flue gas temperature, guarantees the operation that flue gas desulfur device can be long-term, safe, stable.Be applicable to flue gas desulfurization fields such as Ferrous Metallurgy, power industry, petrochemical industry, waste incineration.
Claims (6)
1. circulating fluid bed flue-gas desulfurizing device, mainly comprise Venturi tube (2), desulfurizing tower diffusion cone (16), fresh water (FW) nozzle (5), desulfurizing tower (7), deduster (8), return ash bucket (9) and ash returning tube (10), it is characterized in that: 1～8 fresh water (FW) nozzle (5) is set, mounting process water regulating valve (13) on each fresh water (FW) nozzle (5) water return pipeline on desulfurizing tower diffusion cone (16).
2. circulating fluid bed flue-gas desulfurizing device as claimed in claim 1 is characterized in that: the model of fresh water (FW) nozzle (5) is identical.
3. circulating fluid bed flue-gas desulfurizing device as claimed in claim 1 is characterized in that: a fresh water (FW) nozzle (5) is connected with a technology water pump (14) separately.
4. New Cycle flue gas desulfurization device of fluidized bed as claimed in claim 3 is characterized in that: the motor of technology water pump (14) adopts variable-frequency motor, and pressure monitoring device (15) is arranged on the pump discharge pipeline.
5. New Cycle flue gas desulfurization device of fluidized bed as claimed in claim 1 is characterized in that: each fresh water (FW) nozzle (5) is connected with the fresh water (FW) pipeline with flexible pipe (4).
6. New Cycle flue gas desulfurization device of fluidized bed as claimed in claim 1 is characterized in that: 1～8 fresh water (FW) nozzle is connected with a technology water pump by the fresh water (FW) pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126285U CN201384927Y (en) | 2009-02-09 | 2009-02-09 | Flue gas desulphurization device of circulating fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126285U CN201384927Y (en) | 2009-02-09 | 2009-02-09 | Flue gas desulphurization device of circulating fluidized bed |
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| Publication Number | Publication Date |
|---|---|
| CN201384927Y true CN201384927Y (en) | 2010-01-20 |
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| CN200920126285U Expired - Lifetime CN201384927Y (en) | 2009-02-09 | 2009-02-09 | Flue gas desulphurization device of circulating fluidized bed |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000492A (en) * | 2010-11-26 | 2011-04-06 | 中冶赛迪工程技术股份有限公司 | Lime slurry jetting circulating fluid bed semi-dry process desulfurizer |
| CN107029540A (en) * | 2017-05-16 | 2017-08-11 | 南京龙源环保有限公司 | A kind of New Cycle fluid bed flue gas desulfurization system |
| CN107551798A (en) * | 2017-09-29 | 2018-01-09 | 江苏亿金环保科技有限公司 | A kind of calcium hydroxide charging gear for coal-fired flue-gas semi-dry desulphurization |
| CN113304585A (en) * | 2021-05-22 | 2021-08-27 | 北京铝能清新环境技术有限公司 | Semi-dry desulfurization system suitable for low-sulfur flue gas |
-
2009
- 2009-02-09 CN CN200920126285U patent/CN201384927Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000492A (en) * | 2010-11-26 | 2011-04-06 | 中冶赛迪工程技术股份有限公司 | Lime slurry jetting circulating fluid bed semi-dry process desulfurizer |
| CN102000492B (en) * | 2010-11-26 | 2013-02-27 | 中冶赛迪工程技术股份有限公司 | Lime slurry jetting circulating fluid bed semi-dry process desulfurizer |
| CN107029540A (en) * | 2017-05-16 | 2017-08-11 | 南京龙源环保有限公司 | A kind of New Cycle fluid bed flue gas desulfurization system |
| CN107551798A (en) * | 2017-09-29 | 2018-01-09 | 江苏亿金环保科技有限公司 | A kind of calcium hydroxide charging gear for coal-fired flue-gas semi-dry desulphurization |
| CN107551798B (en) * | 2017-09-29 | 2023-11-28 | 江苏亿金环保科技有限公司 | Slaked lime feeding device for semi-dry desulfurization of coal-fired flue gas |
| CN113304585A (en) * | 2021-05-22 | 2021-08-27 | 北京铝能清新环境技术有限公司 | Semi-dry desulfurization system suitable for low-sulfur flue gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100120 |