CN111068475A - Gas boiler SDS sodium-based dry-method desulfurized ash circulating and returning device - Google Patents
Gas boiler SDS sodium-based dry-method desulfurized ash circulating and returning device Download PDFInfo
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- CN111068475A CN111068475A CN202010133020.1A CN202010133020A CN111068475A CN 111068475 A CN111068475 A CN 111068475A CN 202010133020 A CN202010133020 A CN 202010133020A CN 111068475 A CN111068475 A CN 111068475A
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- pipeline
- boiler flue
- ash
- boiler
- based dry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention relates to flue gas purification and desulfurization equipment of a gas boiler, in particular to a SDS sodium-based dry-method desulfurized ash circulating and returning device of the gas boiler. Including hopper, mill, draught fan, boiler flue, desulfurizing tower, dust remover, ash bucket, conveyer down, the hopper is connected down to the feed end of mill, and the discharge end of mill passes through the draught fan and connects the boiler flue, and the desulfurizing tower is connected to the boiler flue, and the desulfurizing tower is connected with the dust remover, and the conveyer is connected through the ash bucket to the dust remover, and the unloading hole has been seted up to the conveyer bottom, and the unloading hole is connected to the boiler flue through recirculation pipe. The device can recycle the sodium bicarbonate which is doped in the desulfurized fly ash and is not completely reacted, thereby reducing the waste of the desulfurizer and the desulfurization cost; the stable and controllable data of sulfur dioxide and nitrogen oxide are ensured; the problem that the desulfurization system cannot be maintained on line is solved; the waste is recycled, and the environmental protection cost is saved.
Description
Technical Field
The invention relates to flue gas purification and desulfurization equipment of a gas boiler, in particular to a SDS sodium-based dry-method desulfurized ash circulating and returning device of the gas boiler.
Background
Sodium Dodecyl Sulfate (SDS) sodium-based dry desulfurization of a gas boiler uses sodium bicarbonate to carry out single chemical reaction with boiler flue gas, so that 30% of incompletely-reacted sodium bicarbonate is doped in a desulfurization byproduct (desulfurization ash), a large amount of waste of a desulfurizing agent is caused, and the desulfurization cost is increased.
Disclosure of Invention
The invention aims to solve the problems, and provides the SDS sodium-based dry-method desulfurized ash circulating material returning device for the gas boiler, which can recycle the incompletely-reacted sodium bicarbonate doped in the desulfurized ash, reduce the waste of a desulfurizing agent and reduce the desulfurization cost.
The invention solves the problems and adopts the technical scheme that:
the utility model provides a gas boiler SDS sodium based dry process desulfurization ash circulation returning charge device, includes hopper, mill, draught fan, boiler flue, desulfurizing tower, dust remover, ash bucket, conveyer down, hopper under the mill feed end is connected, and the mill discharge end passes through the draught fan and connects the boiler flue, and the desulfurizing tower is connected to the boiler flue, and the desulfurizing tower is connected with the dust remover, and the dust remover passes through the ash bucket and connects the conveyer, and the unloading hole has been seted up to the conveyer bottom, and the unloading hole is connected to the boiler flue through recirculation pipe.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
① the device can recycle the sodium bicarbonate which is doped in the desulfurized fly ash and is not completely reacted, thereby reducing the waste of the desulfurizer and the desulfurization cost.
②, the data of sulfur dioxide and nitrogen oxide are stable and controllable.
③ solves the problem that the desulphurization system can not be maintained on line.
④ the waste is reused, saving the environmental protection cost.
Preferably, the further technical scheme of the invention is as follows:
the recycling pipeline comprises a vertical pipeline, an elbow and a transverse pipeline, one end of the elbow is connected with a discharging hole at the bottom of the conveyor through the vertical pipeline, and the other end of the elbow is connected with a boiler flue through the transverse pipeline.
The vertical pipeline is sequentially provided with a manual gate valve and a star-shaped ash discharger from top to bottom.
The bent pipe is connected with a high-pressure blowing machine through a blowing pipeline.
And a manual gate valve is arranged on the transverse pipeline close to the boiler flue.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure: a feeding hopper 1; a mill 2; a draught fan 3; a boiler flue 4; a desulfurizing tower 5; a dust remover 6; an ash hopper 7; a first star-shaped ash discharger 8; a conveyor 9; a manual gate valve 10; a second star-shaped ash discharger 11; a recirculation line 12; a blowing duct 13; a manual gate valve 14; a high-pressure blowing machine 15.
The specific implementation mode is as follows:
the invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
Referring to fig. 1, a gas boiler SDS sodium-based dry method desulfurized ash circulation material returning device comprises a blanking hopper 1, a mill 2, an induced draft fan 3, a boiler flue 4, a desulfurizing tower 5, a dust remover 6, an ash bucket 7 and a conveyor 9, wherein the feeding end of the mill 2 is connected with the blanking hopper 1, the discharging end of the mill 2 is connected with the boiler flue 4 through the induced draft fan 3, the boiler flue 4 is connected with the desulfurizing tower 5, the desulfurizing tower 5 is connected with the dust remover 6, the dust remover 6 is connected with the conveyor 9 through the ash bucket 7, a first star-shaped ash discharger 8 is arranged at the blanking port of the ash bucket 7, a blanking hole is arranged at the bottom of the conveyor 9 and is connected with the boiler flue 4 through a recirculation pipeline 12, the recirculation pipeline 12 comprises a vertical pipeline, a bent pipe and a transverse pipeline, one end of the bent pipe is connected with the blanking hole at the bottom of the conveyor 9 through the vertical pipeline, the other end of the, the vertical pipeline is sequentially provided with a manual gate valve 10 and a second star-shaped ash discharger 11 from top to bottom, the bent pipe is connected with a high-pressure injection machine 15 through an injection pipeline 13, and the transverse pipeline is provided with a manual gate valve 14 close to the boiler flue 4.
The process flow comprises the following steps:
(1) feeding 80-200 meshes of sodium bicarbonate from a feeding hopper 1, and crushing the sodium bicarbonate into 800 meshes by a mill 2;
(2) spraying 800-mesh sodium bicarbonate into a boiler flue 4 through an induced draft fan 3;
(3) the sodium bicarbonate enters the desulfurizing tower 5 along with the boiler flue gas flow, and the sodium bicarbonate and sulfur dioxide in the flue gas are accelerated to react at a Venturi;
(4) the desulfurized sodium bicarbonate passes through a cloth bag of a dust remover 6 and is intercepted and enters an ash bucket 7;
(5) desulfurized ash containing 30% of sodium bicarbonate in the ash hopper 7 enters a conveyor 9 through a first star-shaped ash discharge valve 8;
(6) desulfurized ash in the conveyor 9 is discharged into a fly ash recirculation pipeline 12 after entering a second star-shaped ash discharge valve 11 through a manual gate valve 10;
(7) the desulfurized ash in the recirculation duct 12 is sent to the boiler flue 4 by being blown through the blowing duct 13.
(8) And a manual gate valve 14 is arranged at the position close to the flue, so that the system is convenient to cut off.
In this embodiment, taking a # 6 dust collector and a # 4 conveyor of a flue gas purification system of a 2 × 80t/h gas boiler as examples, the manufacturing and implementation modes are as follows:
1. DN200 holes are formed in the bottom of the 4# conveyor;
2. DN200 manual gate valve is welded under the hole;
3. a DN200 star-shaped ash discharger is arranged below the manual gate valve;
4. a DN200 pipeline is welded below the star-shaped ash discharger;
5. a DN200 elbow is welded below the pipeline;
6. a pipeline of DN200 is welded below the elbow to the boiler flue;
7. a pressure air injection pipe of DN20 is additionally arranged at the elbow;
8. a DN200 manual gate valve is arranged near the flue.
The device can recycle the sodium bicarbonate which is doped in the desulfurized fly ash and is not completely reacted, thereby reducing the waste of the desulfurizer and the desulfurization cost; the stable and controllable data of sulfur dioxide and nitrogen oxide are ensured; the problem that the desulfurization system cannot be maintained on line is solved; the waste is recycled, and the environmental protection cost is saved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (5)
1. The utility model provides a gas boiler SDS sodium based dry process desulfurization ash circulation returning charge device, includes hopper, mill, draught fan, boiler flue, desulfurizing tower, dust remover, ash bucket, conveyer down, hopper under the feed end of mill is connected, and the discharge end of mill passes through the draught fan and connects the boiler flue, and the desulfurizing tower is connected to the boiler flue, and the desulfurizing tower is connected with the dust remover, and the dust remover passes through the ash bucket and connects conveyer, its characterized in that: the bottom of the conveyor is provided with a feeding hole, and the feeding hole is connected to a boiler flue through a recirculation pipeline.
2. The SDS sodium-based dry desulfurized ash circulation returning charge device of the gas boiler according to the claim 1, characterized in that: the recycling pipeline comprises a vertical pipeline, an elbow and a transverse pipeline, one end of the elbow is connected with a discharging hole at the bottom of the conveyor through the vertical pipeline, and the other end of the elbow is connected with a boiler flue through the transverse pipeline.
3. The SDS sodium-based dry desulfurized ash circulation returning charge device of the gas boiler according to claim 2, characterized in that: the vertical pipeline is sequentially provided with a manual gate valve and a star-shaped ash discharger from top to bottom.
4. The SDS sodium-based dry desulfurized ash circulation returning charge device of the gas boiler according to claim 2, characterized in that: the bent pipe is connected with a high-pressure blowing machine through a blowing pipeline.
5. The SDS sodium-based dry desulfurized ash circulation returning charge device of the gas boiler according to claim 2, characterized in that: and a manual gate valve is arranged on the transverse pipeline close to the boiler flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133020.1A CN111068475A (en) | 2020-03-01 | 2020-03-01 | Gas boiler SDS sodium-based dry-method desulfurized ash circulating and returning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133020.1A CN111068475A (en) | 2020-03-01 | 2020-03-01 | Gas boiler SDS sodium-based dry-method desulfurized ash circulating and returning device |
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| CN111068475A true CN111068475A (en) | 2020-04-28 |
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| CN202010133020.1A Pending CN111068475A (en) | 2020-03-01 | 2020-03-01 | Gas boiler SDS sodium-based dry-method desulfurized ash circulating and returning device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112044259A (en) * | 2020-09-07 | 2020-12-08 | 中建材环保研究院（江苏）有限公司 | Sodium-based dry desulphurization and desulphurization byproduct recycling device |
| CN113731160A (en) * | 2021-09-13 | 2021-12-03 | 江苏新中金环保科技股份有限公司 | Preparation method of calcium-based synchronous desulfurization and denitrification agent |
| CN113926298A (en) * | 2021-11-08 | 2022-01-14 | 江苏天洁环保装备有限公司 | Sodium-based dry flue gas desulfurization process |
-
2020
- 2020-03-01 CN CN202010133020.1A patent/CN111068475A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112044259A (en) * | 2020-09-07 | 2020-12-08 | 中建材环保研究院（江苏）有限公司 | Sodium-based dry desulphurization and desulphurization byproduct recycling device |
| CN113731160A (en) * | 2021-09-13 | 2021-12-03 | 江苏新中金环保科技股份有限公司 | Preparation method of calcium-based synchronous desulfurization and denitrification agent |
| CN113926298A (en) * | 2021-11-08 | 2022-01-14 | 江苏天洁环保装备有限公司 | Sodium-based dry flue gas desulfurization process |
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