CN201978669U - Dual-spray-gun flue gas desulfurization device for circulating fluidized bed - Google Patents
Dual-spray-gun flue gas desulfurization device for circulating fluidized bed Download PDFInfo
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- CN201978669U CN201978669U CN201120027905XU CN201120027905U CN201978669U CN 201978669 U CN201978669 U CN 201978669U CN 201120027905X U CN201120027905X U CN 201120027905XU CN 201120027905 U CN201120027905 U CN 201120027905U CN 201978669 U CN201978669 U CN 201978669U
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- flue gas
- spray gun
- desulfurizing tower
- fluidized bed
- fresh water
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Abstract
The utility model relates to a dual-spray-gun flue gas desulfurization device for a circulating fluidized bed. A desulfurization tower diffuser of the device is arranged at the lower part of the desulfurization tower and is arranged above a Venturi pipe; a flue gas inlet is arranged at one side of the bottom part of the dual-spray-gun flue gas desulfurization device for the circulating fluidized bed; the Venturi pipe is arranged at the upper part of the flue gas inlet; an outlet of the desulfurization tower is arranged at one side of the desulfurization tower; a desulfurizer joint is arranged on the side wall of the desulfurization tower diffuser; and each of the upper part of the desulfurization tower diffuser and the lower part of the desulfurization tower is provided with a process water spray gun respectively. Compared with the prior art, the device has the outstanding advantages that a process water nozzle is changed into the process water spray gun and the compressed air is added in the spray gun; simultaneously two independent process water spray guns are provided, thus sufficiently adjusting the temperature of the flue gas in the desulfurization tower. A mist remover is transversely arranged in the horizontal flue; therefore, the flow speed of the mist remover is improved, the mist removing area is saved, and the cost is reduced.
Description
Technical field
The utility model relates to flue gas desulfurization fields such as Ferrous Metallurgy, power industry, petrochemical industry, waste incineration, or rather, relates to the two spray gun flue gas desulfur devices of a kind of recirculating fluidized bed.
Background technology
The main flow process of circulating fluid bed flue-gas desulfurizing device is that flue gas enters desulfurizing tower from the desulfurizing tower inlet after Venturi tube quickens, on desulfurizing tower diffusion cone, spray into desulfurizing agent, circulating ash and fresh water (FW) respectively, fully mix, react with flue gas in tower, 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.The 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.
The desulphurization mechanism of circulating fluid bed flue-gas desulfurizing device is that desulfurizing agent (Ca (OH) 2) SO2 of powdered granule in flue gas reacts, and forms calcium sulfite on the desulfurizing agent surface.
The reaction of desulfurizing agent and SO2 is a gas-solid reaction in flue gas, its reaction speed is extremely low, and, the Ca (OH) 2 that can intercept sorbent particle inside at desulfurizing agent surface formation calcium sulfite continues to react with SO2, therefore, need in desulfurizing tower, spray into atomized water, water smoke is dripped with sorbent particle to combine, and at the surperficial moisture film that forms the several nanometer thickness of one deck of sorbent particle, SO2 is spread to water film surface, with the desulfurizing agent generation ionic reaction of dissolving in the moisture film, thereby accelerate desulphurization reaction speed; 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.Because desulfurizing agent once can not utilized fully through in the process of desulfurizing tower, need send it back to desulfurizing tower again with EGR and continue to use, thereby improve sorbent utilization.
The temperature of flue gas self can make the atomized water evaporation, and the flue gas that comes out from desulfurizing tower requires to contain aqueous water, to guarantee the safe operation of equipment such as the follow-up deduster of desulfurizer, air-introduced machine.
The circulating fluid bed flue-gas desulfurizing device that at present existing engineering is used is to adopt single fresh water (FW) nozzle, and the subject matter of existence is:
1. fresh water (FW), desulfurizing agent and circulating ash etc. spray into desulfurizing tower respectively, single fresh water (FW) only depend on nozzle not make to spray into desulfurizing agent in atomized water and the flue gas in the desulfurizing tower 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 is permeated the SO2 in the flue gas in moisture film and desulfurizing agent to dissolve in time of moisture film shorter, the effective reaction time of desulfurizing agent solid particle in tower is shorter, causes the general reaction efficient in the 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.
The utility model content
The technical problem that solves
Considering that prior art exists under the situation of the problems referred to above, designed the utility model.The purpose of this utility model is to provide a kind of recirculating fluidized bed two spray gun flue gas desulfur devices, to solve the problems that exist in the prior art.
Technical scheme
For solving the problems referred to above that prior art exists, the utility model provides a kind of recirculating fluidized bed two spray gun flue gas desulfur devices, this device comprises smoke inlet, Venturi tube, the desulfurizing agent interface, the fresh water (FW) spray gun, desulfurizing tower, the desulfurizing tower outlet, and desulfurizing tower diffuser, wherein, described desulfurizing tower diffuser is positioned at the bottom of desulfurizing tower and is arranged on the Venturi tube, described smoke inlet is arranged on bottom one side of the two spray gun flue gas desulfur devices of recirculating fluidized bed, Venturi tube is arranged at this smoke inlet top, the desulfurizing tower outlet is arranged at desulfurizing tower top one side, the desulfurizing agent interface arrangement is arranged a fresh water (FW) spray gun respectively on desulfurizing tower diffuser top and desulfurizing tower bottom on the sidewall of desulfurizing tower diffuser.
The two spray gun flue gas desulfur devices of described recirculating fluidized bed also comprise the circulating ash interface, and this circulating ash interface is positioned at desulfurizing tower diffuser one side.
Described fresh water (FW) spray gun connects technology water pump and pressure monitoring device.
On the described fresh water (FW) spray gun outlet conduit process adjustments valve is set.
Technique effect
The utility model compared with prior art, salient point changes the fresh water (FW) nozzle into spray gun exactly, adds compressed air, and the fresh water (FW) spray gun of two platform independent is set simultaneously, can fully regulate flue-gas temperature in the desulfurizing tower.This use novel pin sprays into fresh water (FW) to the desulfurizing agent distribution situation in the flue gas in the desulfurizing tower, and flue gas and desulfurizing agent abundant and in the tower mix, and fast reaction speed improves reaction efficiency, reduces doctor solution consumption.The fresh water (FW) spray gun adopts same model, and convenient standby, a fresh water (FW) spray gun is connected with a technology water pump separately, enlarged the adjustable range of desulfurizing tower injection flow rate, and control flexibly, easy to operate, can significantly improve sorbent utilization and desulfuration efficiency, prolong putting into operation the time of desulfurizer.Demister is horizontally placed in the horizontal flue, improves the demister flow velocity, saves the demist area, reduces cost.
Description of drawings
From the following description to preferred embodiments and drawings that purport of the present utility model and use thereof are described, above and other purpose of the present utility model, characteristics and advantage will be conspicuous, in the accompanying drawings:
Fig. 1 is according to the two spray gun flue gas desulfur device structural representations of recirculating fluidized bed of the present utility model.
In Fig. 1:, 1, smoke inlet; 2, Venturi tube; 3, desulfurizing agent interface; 4, fresh water (FW) spray gun; 5, desulfurizing tower; 6, desulfurizing tower outlet; 7, desulfurizing tower diffuser; 8, circulating ash interface; 9, technology water pump; 10, pressure monitoring device.
The specific embodiment
Below, will be described in detail the utility model specific embodiment mode in conjunction with the accompanying drawings.
As shown in Figure 1, include desulfurizing tower 5, desulfurizing tower diffuser 7 and Venturi tube 2, and described desulfurizing tower diffuser 7 is positioned at the bottom of desulfurizing tower 5 and is arranged on the Venturi tube 2 according to the two spray gun flue gas desulfur devices of recirculating fluidized bed of the present utility model.Bottom one side at the two spray gun flue gas desulfur devices of recirculating fluidized bed is provided with smoke inlet 1, and Venturi tube is arranged at described smoke inlet 1 top, and the desulfurizing tower outlet is arranged at desulfurizing tower top one side.Desulfurizing agent interface 3 is arranged on the sidewall of desulfurizing tower diffuser 7, arranges a fresh water (FW) spray gun 4 respectively on desulfurizing tower diffuser 7 tops and desulfurizing tower 5 bottoms.Like this, flue gas enters this desulfurizer from smoke inlet 1, sprays into desulfurizing tower 5 at a high speed from desulfurizing tower bottom centre after Venturi tube 2 is quickened.Strength carries desulfurizing agent to spray into desulfurizing tower 5 from the desulfurizing agent interface 3 of desulfurizing tower diffuser 7 sidewalls.The fresh water (FW) interface is two-layer on desulfurizing tower diffuser 7 tops and desulfurizing tower 5 lower disposed, and every layer is provided with a fresh water (FW) spray gun 4.Fresh water (FW) spray gun 4 usefulness flexible pipes are connected with the fresh water (FW) pipeline, insert compressed air in the pipeline simultaneously.Fresh water (FW) spray gun 4 adopts same model, and a fresh water (FW) spray gun 4 is connected with pressure monitoring device 10 with a technology water pump 9 by inlet channel.Flue gas comes out to enter corresponding deduster from desulfurizing tower outlet 6.Circulating ash connects by circulating ash interface 8, and circulating ash enters and continues reaction in the desulfurizing tower.
Therefore,, on desulfurizing tower diffusion segment body, arrange a fresh water (FW) spray gun, behind diffuser, arranging a fresh water (FW) spray gun according to the two spray gun flue gas desulfur devices of recirculating fluidized bed of the present utility model.Spray gun one tunnel connects fresh water (FW), and one the tunnel connects the high compression air, and the water droplet that ejects is fully atomized.Fresh water (FW) sprays into desulfurizing tower after the spray gun atomizing, 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.
Adopt the fresh water (FW) spray gun of two same model, a fresh water (FW) spray gun is connected with a technology water pump separately, can independent start and stop, adjusting.When entrance flue gas temperature or flue gas flow are reduced to single spray gun recirculating fluidized bed can't move the time, the utility model is by turning down or close another one fresh water (FW) spray gun, 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.The motor of technology water pump adopts variable-frequency motor, and pressure monitoring and alarm 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) spray gun outlet conduit the fresh water (FW) control valve is set, guarantees that each fresh water (FW) nozzle can independently carry out Flow-rate adjustment.Fresh water (FW) spray gun 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.Other one road of fresh water (FW) spray gun inserts the high compression air, make compressed air and fresh water (FW) fully by spray gun after, have lance ejection to come out, fresh water (FW) is fully atomizing under the effect of compressed air and spray gun, reduces the possibility that big drop glues wall.
Although illustrated and described preferred embodiment of the present utility model, it is contemplated that those skilled in the art can design various modifications of the present utility model in the spirit and scope of claims.
Claims (4)
1. two spray gun flue gas desulfur devices of a recirculating fluidized bed is characterized in that:
This device comprises smoke inlet, Venturi tube, the desulfurizing agent interface, the fresh water (FW) spray gun, desulfurizing tower, the desulfurizing tower outlet, and desulfurizing tower diffuser, wherein, described desulfurizing tower diffuser is positioned at the bottom of desulfurizing tower and is arranged on the Venturi tube, described smoke inlet is arranged on bottom one side of the two spray gun flue gas desulfur devices of recirculating fluidized bed, Venturi tube is arranged at this smoke inlet top, the desulfurizing tower outlet is arranged at desulfurizing tower top one side, the desulfurizing agent interface arrangement is arranged a fresh water (FW) spray gun respectively on desulfurizing tower diffuser top and desulfurizing tower bottom on the sidewall of desulfurizing tower diffuser.
2. the two spray gun flue gas desulfur devices of recirculating fluidized bed as claimed in claim 1 is characterized in that:
The two spray gun flue gas desulfur devices of described recirculating fluidized bed also comprise the circulating ash interface, and this circulating ash interface is positioned at desulfurizing tower diffuser one side.
3. the two spray gun flue gas desulfur devices of recirculating fluidized bed as claimed in claim 1 is characterized in that:
Described fresh water (FW) spray gun connects technology water pump and pressure monitoring device.
4. as the two spray gun flue gas desulfur devices of the arbitrary described recirculating fluidized bed of claim 1-3, it is characterized in that:
On the described fresh water (FW) spray gun outlet conduit process adjustments valve is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120027905XU CN201978669U (en) | 2011-01-27 | 2011-01-27 | Dual-spray-gun flue gas desulfurization device for circulating fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120027905XU CN201978669U (en) | 2011-01-27 | 2011-01-27 | Dual-spray-gun flue gas desulfurization device for circulating fluidized bed |
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| Publication Number | Publication Date |
|---|---|
| CN201978669U true CN201978669U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120027905XU Expired - Fee Related CN201978669U (en) | 2011-01-27 | 2011-01-27 | Dual-spray-gun flue gas desulfurization device for circulating fluidized bed |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107632A (en) * | 2013-04-18 | 2014-10-22 | 韩国energy技术研究院 | Spouted bed type reactor for semi-dry flue gas desulfurization and multi-stage desulfurization using thereof |
| CN105664704A (en) * | 2016-04-11 | 2016-06-15 | 施磊 | Semidry flue gas desulfurization dust collector |
| CN107213778A (en) * | 2017-07-31 | 2017-09-29 | 施磊 | Inertia semi-dry process flue gas desulphurization reaction tower |
| CN107308803A (en) * | 2017-08-16 | 2017-11-03 | 华能白山煤矸石发电有限公司 | A kind of circulating fluidized bed desulfurization tower and control method |
-
2011
- 2011-01-27 CN CN201120027905XU patent/CN201978669U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107632A (en) * | 2013-04-18 | 2014-10-22 | 韩国energy技术研究院 | Spouted bed type reactor for semi-dry flue gas desulfurization and multi-stage desulfurization using thereof |
| CN104107632B (en) * | 2013-04-18 | 2017-04-12 | 韩国energy技术研究院 | Spouted bed type reactor for semi-dry flue gas desulfurization and multi-stage desulfurization using thereof |
| CN105664704A (en) * | 2016-04-11 | 2016-06-15 | 施磊 | Semidry flue gas desulfurization dust collector |
| CN105664704B (en) * | 2016-04-11 | 2019-02-22 | 施磊 | Semidry flue gas desulfurization dust collector |
| CN107213778A (en) * | 2017-07-31 | 2017-09-29 | 施磊 | Inertia semi-dry process flue gas desulphurization reaction tower |
| CN107213778B (en) * | 2017-07-31 | 2023-03-21 | 江苏玺蓝科环境工程技术有限公司 | Inertia semi-dry method flue gas desulfurization reaction tower |
| CN107308803A (en) * | 2017-08-16 | 2017-11-03 | 华能白山煤矸石发电有限公司 | A kind of circulating fluidized bed desulfurization tower and control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20120127 |