CN103816795A - Semi-dry process desulfurization dust-removing technique and device - Google Patents
Semi-dry process desulfurization dust-removing technique and device Download PDFInfo
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- CN103816795A CN103816795A CN201410096298.0A CN201410096298A CN103816795A CN 103816795 A CN103816795 A CN 103816795A CN 201410096298 A CN201410096298 A CN 201410096298A CN 103816795 A CN103816795 A CN 103816795A
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Abstract
The invention relates to a semi-dry process desulfurization dust-removing technique and a semi-dry process desulfurization dust-removing device. The device comprises a desulfurization tower, a primary cyclone dust remover, a secondary pulse bag-type dust remover, a fan and a chimney which are arranged in sequence, wherein the chimney is connected with an air outlet of the fan; a scraper machine is used for conveying a desulfurization agent into a circulating ash bin; the circulating ash bin and a new ash bin are used for conveying the desulfurization agent into the desulfurization tower through the same pneumatic ash conveying device; a smoke flow rectifier comprises an upper cone-shaped cover plate and a lower inversely cone-shaped cover plate which are arranged up and down and connected to be a whole body; the smoke diffuses from the center to two sides to form a bottom-top flat flow layer. According to the semi-dry process desulfurization dust-removing technique and the device, a movement manner with combination of airflow inverse gravity field flow and solid-phase following gravity field is adopted, so that the problem that the tower is sticky at the offside of an air inlet due to a dense-phase dry tower process air inlet manner is solved; the minimum flow speed limit of airflow due to a circulating fluidized bed method is avoided; the circulating quantity of the desulfurization agent can be reduced; the working pressure of the subsequent scraper machine, a bucket elevator and the dust remover can be reduced; the service life of the device can be prolonged; the operation cost can be reduced.
Description
Technical field
The present invention relates to the technical field of environmental protection equipment, especially a kind of semi-dry process desulfurization dust-removing technique and equipment.
Background technology
In known technical field, existing Summary of Semi-dry Flue Gas Desulfurization generally has circulating fluidized bed system and dense-phase tower method.
Wherein, dense-phase tower method utilizes scrapper conveyor and bucket elevator that desulfurizing agent direct circulation is returned to desulfurizing tower, and this mode can exist because circulation desulfurization dosage exceeds scrapper conveyor load-bearing capacity, causes the design defect that cannot normally produce.
Secondly, flue gas and desulfurizing agent motion from bottom to top simultaneously in circulating fluidized bed system, can the interior optimum desulfurization condition of control tower, and desulfurizing agent utilization ratio is high.But circulating fluidized bed system requires air quantity stable, there is minimum wind speed restriction,, there is very large problem in the unstable bed that collapses that easily causes of flue gas air quantity flow velocity, promote and be subject to serious obstruction in industrial practice.Desulfurizing agent after dense-phase tower method flue gas and humidification is simultaneously moving to tower bottom flow from tower top, and accommodative ability of environment is strong.But flue gas and the desulfurizing agent reaction time in tower is short, contact insufficient, desulfuration efficiency is low, need a large amount of constantly invalid circulations in system of desulfurizing agent, in production, often occur that sticky tower phenomenon easily causes production accident, simultaneously cleaner operating pressure is large, and bucket elevator, scrapper conveyor operating load are large, and maintain and replace is frequent.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the problems referred to above, a kind of semi-dry process desulfurization dust-removing technique and equipment are provided, the advantage of comprehensive dense-phase tower method and circulating fluidized bed system, to improve the efficiency of desulfurization, load and the repair rate of reduction equipment.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of semi-dry process desulfurization dust-removing technique, comprises following operating procedure:
(a) flue gas enters and is spread by middle mind-set both sides after desulfurizing tower and form stratosphere from bottom to top;
(b) add desulfurizing agent at the top of desulfurizing tower and form the flow direction from top to bottom by agitating device, and being respectively arranged with humidifying device at the downside of agitating device and the upside of desulfurizing agent porch;
(c) after flue gas and desulfurizing agent haptoreaction, flue gas is discharged after via dust arrester, and in dust arrester, filters gained desulfurizing agent and be delivered to via scrapper conveyor in same circulation ash silo together with the desulfurizing agent of discharging from desulfurization tower bottom;
Wherein: described circulation ash silo is supplied with desulfurizing agent by pneumatic ash conveying plant to desulfurizing tower, when the active ingredient of the desulfurizing agent in circulation ash silo reduces, carry out supplementing of new desulfurizing agent by pneumatic ash conveying plant, and clear up the desulfurizing agent of the inefficacy in circulation ash silo.
In order to realize smoothly above-mentioned technique: a kind of semi-dry desulphurization cleaner, comprise the desulfurizing tower arranging in turn, cyclone dust collectors, second pulse formula sack cleaner, blower fan and the chimney being connected with the air outlet of blower fan, at the outlet at bottom of described desulfurizing tower, the outlet of cyclone dust collectors, the below of the outlet of second pulse formula sack cleaner is provided with scrapper conveyor, described scrapper conveyor is delivered to desulfurizing agent in circulation ash silo, described equipment also has new ash silo, and described circulation ash silo is all carried desulfurizing agent by same pneumatic ash conveying plant with new ash silo in desulfurizing tower, between described pneumatic ash conveying plant and the top of desulfurizing tower, be provided with desulfurizing agent conveyance conduit, described desulfurizing agent conveyance conduit is inserted in desulfurizing tower and is provided with nozzle downward at the end outlet place of pipeline, below described nozzle, be provided with desulfurizing agent stirring distributor, be respectively arranged with humidification activation nozzle at the downside of desulfurizing agent stirring distributor and the upside of nozzle, on the sidewall of described desulfurizing tower bottom, be provided with smoke inlet pipeline, be provided with flue gas flow equalizing device at the end of described smoke inlet pipeline, on described flue gas flow equalizing device has, under be connected as a single entity arrange upper circular cone cover plate and lower inverted cone Exported Cone, the end of described smoke inlet pipeline arranges and is inserted into the middle part of the inner chamber of circular cone cover plate straight up, the top of the inner chamber of circular cone cover plate is provided with the spoiler that keeps out the wind that cross section is circular arc on described, and described in keep out the wind the edge of spoiler and the inwall of upper circular cone cover plate tangent, the ducted flue gas of described flue gas smoke inlet is successively via the spoiler that keeps out the wind, behind below by lower inverted cone Exported Cone after the flow-disturbing effect of upper circular cone cover plate, export, flue gas is spread by middle mind-set both sides and forms stratosphere from bottom to top.
Further, as a kind of concrete embodiment, the present invention is provided with old ash outlet in described circulation ash silo.
The invention has the beneficial effects as follows: the mode that changes flue gas air inlet in the present invention, adopt the mode of air-flow against the mobile motion combining along gravitational field with solid phase of gravitational field, both solve dense-phase tower method intake method and caused the problem at the sticky tower of air inlet offside, avoid again recirculating fluidized bed method to have minimum flow velocity restriction to air-flow, the problem of the unstable bed that easily collapses of air-flow.And it is unrestricted to gas flow to have dense-phase tower method simultaneously, adaptable advantage, has advantages of that again recirculating fluidized bed method sorbent utilization is high.
This intake method, air-flow is uniformly distributed in tower, flows with desulfurizing agent subtend, has increased the time that desulfurizing agent stops and reacts in tower, can reduce desulfurizing agent internal circulating load.Alleviate follow-up scrapper conveyor, the operating pressure of bucket elevator and deduster, extension device service life, extends scrapper conveyor, in the bucket elevator parts replacement cycle, reduces operating cost.
And secondary filter and double-deck humidifying device are set, and can fully improve the service efficiency of desulfurizing agent, the use of balance desulfurizing agent, the mode of pneumatic ash conveying plant also more can be controlled the quantity delivered of desulfurizing agent, is convenient to control reaction in desulfurizing tower.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the theory structure schematic diagram of equipment in the present invention;
Fig. 2 is the structural representation of flue gas flow equalizing device in the present invention;
In figure: 1. desulfurizing tower, 2. cyclone dust collectors, 3. pulsed sack cleaner, 4. blower fan, 5. chimney, 6. scrapper conveyor, 7. circulation ash silo, 8. new ash silo, 9. pneumatic ash conveying plant, 10. desulfurizing agent conveyance conduit, 11. desulfurizing agent stirring distributors, 12. humidification activation nozzles, 13. smoke inlet pipelines, 14. flue gas flow equalizing devices, circular cone cover plate on 141., 142. times inverted cone Exported Cones, 143. spoilers that keep out the wind.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
The preferred embodiment of a kind of semi-dry process desulfurization dust-removing technique of the present invention, comprises following operating procedure:
(a) flue gas enters and is spread by middle mind-set both sides after desulfurizing tower 1 and form stratosphere from bottom to top;
(b) add desulfurizing agent at the top of desulfurizing tower 1 and form the flow direction from top to bottom by agitating device, and being respectively arranged with humidifying device at the downside of agitating device and the upside of desulfurizing agent porch;
(c) after flue gas and desulfurizing agent haptoreaction, flue gas is discharged after via dust arrester, and in dust arrester, filters gained desulfurizing agent and be delivered to via scrapper conveyor 6 in same circulation ash silo 6 together with the desulfurizing agent of discharging from desulfurization tower bottom;
Wherein: described circulation ash silo 6 supplies with desulfurizing agent to desulfurizing tower 1 by pneumatic ash conveying plant 9, when the active ingredient of the desulfurizing agent in circulation ash silo 6 reduces, carry out supplementing of new desulfurizing agent by pneumatic ash conveying plant 9, and clear up the desulfurizing agent of the inefficacy in circulation ash silo 6.
A kind of semi-dry desulphurization cleaner of the present invention as depicted in figs. 1 and 2, it is the practical structures form of above-mentioned technique, comprise the desulfurizing tower 1 arranging in turn, cyclone dust collectors 2, second pulse formula sack cleaner 3, blower fan 4 and the chimney 5 being connected with the air outlet of blower fan 4, at the outlet at bottom of described desulfurizing tower 1, the outlet of cyclone dust collectors 2, the below of the outlet of second pulse formula sack cleaner 3 is provided with scrapper conveyor 6, described scrapper conveyor 6 is delivered to desulfurizing agent in circulation ash silo 7, main its cushioning effect, and original system direct cycles in desulfurizing tower 1, the load of meeting increase system, described in it, equipment also has new ash silo 8, and described circulation ash silo 7 with new ash silo 8 all by same pneumatic ash conveying plant 9 to the interior conveying desulfurizing agent of desulfurizing tower 1, between described pneumatic ash conveying plant 9 and the top of desulfurizing tower 1, be provided with desulfurizing agent conveyance conduit 10, described desulfurizing agent conveyance conduit 10 is inserted in desulfurizing tower 1 and is provided with nozzle downward at the end outlet place of pipeline, below described nozzle, be provided with desulfurizing agent stirring distributor 11, can grind sorbent particle, sorbent particle is attenuated, increase reactive desulfurizing agent efficiency, be respectively arranged with humidification activation nozzle 12 at the downside of desulfurizing agent stirring distributor 11 and the upside of nozzle, can make effecting reaction tower height increase, increase reaction efficiency in tower, simultaneously by regulating top shower nozzle injection flow rate can reduce the desulfurization dosage that enters follow-up cleaner, reduce cleaner operating pressure, on the sidewall of described desulfurizing tower 1 bottom, be provided with smoke inlet pipeline 13, be provided with flue gas flow equalizing device 14 at the end of described smoke inlet pipeline 13, on described flue gas flow equalizing device 14 has, under be connected as a single entity arrange upper circular cone cover plate 141 and lower inverted cone Exported Cone 142, the end of described smoke inlet pipeline 13 arranges and is inserted into the middle part of the inner chamber of circular cone cover plate 141 straight up, the top of the inner chamber of circular cone cover plate 141 is provided with the spoiler 143 that keeps out the wind that cross section is circular arc on described, and described in keep out the wind the edge of spoiler 143 and the inwall of upper circular cone cover plate 141 tangent, flue gas in described flue gas smoke inlet pipeline 13 is successively via the spoiler 143 that keeps out the wind, behind below by lower inverted cone Exported Cone 142 after the flow-disturbing effect of upper circular cone cover plate 141, export, flue gas is spread by middle mind-set both sides and forms stratosphere from bottom to top.
In described circulation ash silo 7, be provided with old ash outlet.
In the present invention, change the mode of flue gas air inlet, adopt the mode of air-flow against the mobile motion combining along gravitational field with solid phase of gravitational field, both solve dense-phase tower method intake method and caused the problem at the sticky tower of air inlet offside, avoid again recirculating fluidized bed method to have minimum flow velocity restriction to air-flow, the problem of the unstable bed that easily collapses of air-flow.And it is unrestricted to gas flow to have dense-phase tower method simultaneously, adaptable advantage, has advantages of that again recirculating fluidized bed method sorbent utilization is high.
This intake method, air-flow is uniformly distributed in tower, flows with desulfurizing agent subtend, has increased the time that desulfurizing agent stops and reacts in tower, can reduce desulfurizing agent internal circulating load.Alleviate follow-up scrapper conveyor, the operating pressure of bucket elevator and deduster, extension device service life, extends scrapper conveyor, in the bucket elevator parts replacement cycle, reduces operating cost.
And secondary filter and double-deck humidifying device are set, and can fully improve the service efficiency of desulfurizing agent, the use of balance desulfurizing agent, the mode of pneumatic ash conveying plant also more can be controlled the quantity delivered of desulfurizing agent, is convenient to control reaction in desulfurizing tower.
In the present embodiment, only need gas flow rate in control tower to be no more than 1.3 times of critical fluidisation flow velocitys.Reaction temperature, at 70～110 degree, need be adjusted to the optimal reaction temperature that adapts to actual flue gas composition according to knowhow.Solid-liquid mass ratio was at 100: 1～100: 5.The desulfurizing agent internal circulating load that reaches best desulfurized effect is the circulating ash quantity (former dense-phase tower method needs 120 tphs) that 1,000,000 standard cubic meter flue gas hourly approximately needs 40 tphs.
Take above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to claim scope.
Claims (3)
1. a semi-dry process desulfurization dust-removing technique, is characterized in that: comprise following operating procedure:
(a) flue gas enters and is spread by middle mind-set both sides after desulfurizing tower (1) and form stratosphere from bottom to top;
(b) add desulfurizing agent and form the flow direction from top to bottom by agitating device at the top of desulfurizing tower (1), and be respectively arranged with humidifying device at the downside of agitating device and the upside of desulfurizing agent porch;
(c) after flue gas and desulfurizing agent haptoreaction, flue gas is discharged after via dust arrester, and in dust arrester, filters gained desulfurizing agent and be delivered in same circulation ash silo (6) via scrapper conveyor (6) together with the desulfurizing agent of discharging from desulfurization tower bottom;
Wherein: described circulation ash silo (6) supplies with desulfurizing agent to desulfurizing tower (1) by pneumatic ash conveying plant (9), when the active ingredient of the desulfurizing agent in circulation ash silo (6) reduces, carry out supplementing of new desulfurizing agent by pneumatic ash conveying plant (9), and clear up the desulfurizing agent of the inefficacy in circulation ash silo (6).
2. a semi-dry desulphurization cleaner, comprise the desulfurizing tower (1) arranging in turn, cyclone dust collectors (2), second pulse formula sack cleaner (3), blower fan (4) and the chimney (5) being connected with the air outlet of blower fan (4), at the outlet at bottom of described desulfurizing tower (1), the outlet of cyclone dust collectors (2), the below of the outlet of second pulse formula sack cleaner (3) is provided with scrapper conveyor (6), it is characterized in that: described scrapper conveyor (6) is delivered to desulfurizing agent in circulation ash silo (7), described equipment also has new ash silo (8), and described circulation ash silo (7) is all carried desulfurizing agent by same pneumatic ash conveying plant (9) with new ash silo (8) in desulfurizing tower (1), between described pneumatic ash conveying plant (9) and the top of desulfurizing tower (1), be provided with desulfurizing agent conveyance conduit (10), described desulfurizing agent conveyance conduit (10) is inserted in desulfurizing tower (1) and is provided with nozzle downward at the end outlet place of pipeline, below described nozzle, be provided with desulfurizing agent stirring distributor (11), be respectively arranged with humidification activation nozzle (12) at the downside of desulfurizing agent stirring distributor (11) and the upside of nozzle, on the sidewall of described desulfurizing tower (1) bottom, be provided with smoke inlet pipeline (13), be provided with flue gas flow equalizing device (14) at the end of described smoke inlet pipeline (13), on described flue gas flow equalizing device (14) has, under be connected as a single entity arrange upper circular cone cover plate (141) and lower inverted cone Exported Cone (142), the end of described smoke inlet pipeline (13) arranges and is inserted into the middle part of the inner chamber of circular cone cover plate (141) straight up, the top of the inner chamber of circular cone cover plate (141) is provided with the spoiler that keeps out the wind (143) that cross section is circular arc on described, and described in keep out the wind the edge of spoiler (143) and the inwall of upper circular cone cover plate (141) tangent, flue gas in described flue gas smoke inlet pipeline (13) is successively via the spoiler that keeps out the wind (143), behind below by lower inverted cone Exported Cone (142) after the flow-disturbing effect of upper circular cone cover plate (141), export, flue gas is spread by middle mind-set both sides and forms stratosphere from bottom to top.
3. a kind of semi-dry desulphurization cleaner as claimed in claim 1, is characterized in that: in described circulation ash silo (7), be provided with old ash outlet.
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| CN201410096298.0A CN103816795A (en) | 2014-03-17 | 2014-03-17 | Semi-dry process desulfurization dust-removing technique and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750204A (en) * | 2016-04-07 | 2016-07-13 | 重庆华珞粉煤灰开发有限责任公司 | Superfine ash production apparatus and production method |
| CN107694317A (en) * | 2017-11-14 | 2018-02-16 | 遵义市贵科科技有限公司 | A kind of flue gas desulfurization processing unit |
| CN109092058A (en) * | 2018-08-23 | 2018-12-28 | 大同新成新材料股份有限公司 | A kind of low temperature charcoal base combined desulfurization degreasing flue gas device and its application method |
| CN112221173A (en) * | 2020-09-21 | 2021-01-15 | 常宁市华兴冶化实业有限责任公司 | Anti-sticking wall type spray drying device for preparing zinc oxide |
| CN113019092A (en) * | 2021-02-06 | 2021-06-25 | 唐山钢铁集团有限责任公司 | Flue gas desulfurization and denitrification method and system based on dense-phase semi-dry method |
| CN116943421A (en) * | 2023-09-18 | 2023-10-27 | 江苏华星东方电力环保科技有限公司 | High-efficiency turbulent circulation dry deacidification device and method |
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| CN102380308A (en) * | 2010-09-03 | 2012-03-21 | 鞍钢集团工程技术有限公司 | Sintering flue gas desulfurization and purification method and equipment |
| CN102784556A (en) * | 2011-05-19 | 2012-11-21 | 北京博朗环境工程技术股份有限公司 | Homogeneous flow-field circulating fluidized bed flue gas desulfurization technology |
| CN103551004A (en) * | 2013-10-27 | 2014-02-05 | 黑龙江宏宇电站设备有限公司 | Desulfurization method of dry desulfurization system of coal gangue circulating fluidized bed |
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| JPH08953A (en) * | 1994-06-15 | 1996-01-09 | Kawasaki Heavy Ind Ltd | Process and device for semi-dry type desulfurization |
| CN102380308A (en) * | 2010-09-03 | 2012-03-21 | 鞍钢集团工程技术有限公司 | Sintering flue gas desulfurization and purification method and equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750204A (en) * | 2016-04-07 | 2016-07-13 | 重庆华珞粉煤灰开发有限责任公司 | Superfine ash production apparatus and production method |
| CN107694317A (en) * | 2017-11-14 | 2018-02-16 | 遵义市贵科科技有限公司 | A kind of flue gas desulfurization processing unit |
| CN109092058A (en) * | 2018-08-23 | 2018-12-28 | 大同新成新材料股份有限公司 | A kind of low temperature charcoal base combined desulfurization degreasing flue gas device and its application method |
| CN112221173A (en) * | 2020-09-21 | 2021-01-15 | 常宁市华兴冶化实业有限责任公司 | Anti-sticking wall type spray drying device for preparing zinc oxide |
| CN113019092A (en) * | 2021-02-06 | 2021-06-25 | 唐山钢铁集团有限责任公司 | Flue gas desulfurization and denitrification method and system based on dense-phase semi-dry method |
| CN116943421A (en) * | 2023-09-18 | 2023-10-27 | 江苏华星东方电力环保科技有限公司 | High-efficiency turbulent circulation dry deacidification device and method |
| CN116943421B (en) * | 2023-09-18 | 2024-01-12 | 江苏华星东方电力环保科技有限公司 | High-efficiency turbulent circulation dry deacidification device and method |
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Application publication date: 20140528 |