CN201586478U - Two-stage slurry circulation device for large-scale wet flue gas desulfurization - Google Patents
Two-stage slurry circulation device for large-scale wet flue gas desulfurization Download PDFInfo
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- CN201586478U CN201586478U CN2009203191772U CN200920319177U CN201586478U CN 201586478 U CN201586478 U CN 201586478U CN 2009203191772 U CN2009203191772 U CN 2009203191772U CN 200920319177 U CN200920319177 U CN 200920319177U CN 201586478 U CN201586478 U CN 201586478U
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Abstract
The utility model relates to a two-stage slurry circulation device for large-scale wet flue gas desulfurization. The two-stage slurry circulation device comprises an absorption tower, a blender, a slurry pump, an oxidation fan, a mechanical demister, a primary spraying layer and a secondary spraying layer, wherein a shutter-type tray is arranged between the primary spraying layer and the secondary spraying layer; the secondary spraying layer is connected with the bottom of a slurry box outside the tower through a pipe and the slurry pump; pipes are arranged at the lower end of the shutter-type tray and connected with the slurry box outside the tower; and the slurry box outside the tower is connected with a slurry tank in the absorption tower through a pipe. The two-stage slurry circulation device suits flue gas desulfurization of coals with high sulfur content, and has the advantages of less land occupation, low investment, stable operation and so on.
Description
Technical field
The utility model belongs to industrial waste gas purifying environmental protection and energy field, particularly a kind of two-stage loop slurry device that is applicable to large-scale wet process of FGD.
Background technology
Wet desulfurizing process is that current China uses at most, the most effective fume desulphurization method, and the design desulfuration efficiency is not less than 95%.But power plant produces with coal and can only determine that the coal sulfur content significantly increases according to the market supply situation at present, makes burning coal and design ature of coal have bigger difference, simultaneously, also there is increase to a certain degree in the boiler smoke amount, causes some desulfurizer can not reach original design desulfuration efficiency, SO
2Can not qualified discharge.
At this situation, some desulfurization producers have also proposed some remodeling methods and measure at present, as existing desulfurizer is pushed over reconstruction, perhaps increase an auxiliary absorber flue gas is shunted etc., these measures or improvement expenses are huge, destructive serious to existing utility; Need bigger floor space, make on-the-spot place can not satisfy the transformation requirement.
The utility model content
The utility model is a kind of two-stage loop slurry device that is used for large-scale wet process of FGD, comprise absorption tower, agitator, slush pump, oxidation fan, mechanical demister and one-level spraying layer and secondary spraying layer, be provided with the venetian blind type pallet between one-level spraying layer and the secondary spraying layer, the lower end of venetian blind type pallet is furnished with pipeline and is connected to the outer slurries case of tower, the secondary spraying layer is connected to the bottom of the outer slurries case of tower by pipeline, one-level spraying layer loop slurry pH value is controlled at 4-5, and secondary spraying layer loop slurry pH value is controlled at 5.5-6.5.The outer slurries case of tower links to each other by the slurries pond of pipeline with the bottom, absorption tower, is provided with slush pump in the pipeline on the outer slurries case connection of tower absorption tower.
Two-stage loop slurry device of the present utility model, absorption tower one-level spraying layer is as the one-level slurries circulatory system in the absorption tower, and its slurry pH value generally is controlled at 4～5; Be provided with the slurries case outside the absorption tower, spraying layer and venetian blind type pallet are installed in the upper end on the absorption tower with the level spraying layer, and in the slurries case, as the secondary circulatory system on absorption tower, its slurry pH value generally is controlled at 5.5～6.5 to the slurry reflux of collection outside tower; In same absorption tower, realized the two-stage circulatory system of the two pH value controls of slurries like this.Boiler smoke passes the further purification of secondary loop slurry spray district that the venetian blind type pallet enters tower body top again after departmental level loop slurry spray is distinguished purification under the absorption tower, can qualified discharge behind the flue gas process two-stage loop slurry spray washing.
The utility model system and device is realized in the following way:
The utility model system and device is on existing tower prime cement liquid pool one-level circulatory system basis, increase two-layer at the tower body top or three layers of spraying layer as secondary slurries spraying layer, slurries case outside the tower is set near the absorption tower, the circulating pump of supporting secondary slurries, oxidation fan, agitator and connection pump constitute the outer slurries case secondary circulatory system of tower.Secondary loop slurry and demister flushing water are drawn the absorption tower after collecting by the venetian blind type pallet, are back to the outer slurries case of tower, thereby realize the separation of two-stage loop slurry.Slurries in the outer slurries case of tower are forced to deliver in the tower prime cement liquid pool by being communicated with pump, and the further again oxidation of desulfurization product forms gypsum slurries, delivers to gypsum dehydration system through the gypsum excavationg pump and handles.The utility model is realized the two-stage circulatory system of the two pH value controls of slurries in same absorption tower, improve desulfuration efficiency, guarantees SO
2Qualified discharge.The one-level loop slurry pH value of tower prime cement liquid pool is controlled at 4～5, and the pH value is low to help the dissolving of lime stone, the complete oxidation of calcium sulfite and the generation of gypsum, can be controlled at chloride ion corrosion more among a small circle in, and improve the utilization rate of lime stone; The secondary loop slurry pH value of the outer slurries case of tower is controlled at 5.5～6.5, and the pH value is higher to help obtaining higher desulfuration efficiency.Two-stage spraying layer intermediate arrangement has the venetian blind type pallet up and down, and flue gas even flow field behind venetian blind type pallet water conservancy diversion is steady, and flue gas resistance is low; Simultaneously pallet forms the multilayer cascade after collecting slurries, has increased the haptoreaction time with slurries when flue gas passes, and helps improving desulfuration efficiency.
The utility model is handled applicable to the high flue gas desulfurization of coal-fired sulfur content, have occupation of land less, reduced investment, advantage such as stable.
Description of drawings
Accompanying drawing is a kind of two-stage loop slurry schematic representation of apparatus that is used for large-scale wet process of FGD, wherein: 1 is slurries pond agitator, 2 is slurry circulating pump, and 3 is the absorption tower, and 4 is gas approach, 5 is one-level slurries spraying layers, 6 is the venetian blind type pallet, and 7 is secondary slurries spraying layers, and 8 is mechanical demister, 9 is exhanst gas outlet, 10 is the gypsum pump, and 11 is oxidation fan, and 12 is slurry circulating pump, 13 is the slurries box mixer, 14 is the slurries case, and 15 is slush pump, and 16 is oxidation fan, 17 is pipeline, and 18 is pipeline.
The specific embodiment
Provide a preferred forms of the present utility model below in conjunction with accompanying drawing.
Boiler smoke enters absorption tower 3 through gas approach 4, and the loop slurry with spray in the absorption tower contacts, and finishes sweetening process.The slurries circulatory system is made up of the one-level circulatory system and the secondary circulatory system, wherein the one-level circulatory system is finished in the following manner: the slurries that absorb in the Tata prime cement liquid pool are delivered to one-level slurries spraying layer 5 by slurry circulating pump 2, turn back in the tower prime cement liquid pool after finishing desulfurization; The secondary circulatory system is finished in the following manner: the slurries in the slurries case 14 are delivered to secondary slurries spraying layer 7 by slurry circulating pump 12, finish after the desulfurization to be collected by venetian blind type pallet 6 to turn back to slurries case 14 by pipeline 17.The outer slurries case of tower entoplasm liquid pool and tower is equipped with agitator 1 and 13 and oxidation fan 11 and 16 respectively, with precipitation that prevents slurries and the effective generation that guarantees the desulfurated plaster slurries.Slurries in the slurries case 14 are forced to deliver in the tower prime cement liquid pool by pipeline 18 by slush pump 15, when the slurries solid concentration in the tower prime cement liquid pool reaches 15% when above, send into the gypsum dehydration system processing through gypsum pump 10.Flue gas after the washing of two-stage slurries spraying layer is removed the drop that carries in the flue gas by mechanical demister 8, delivers to smoke stack emission through exhanst gas outlet 9 again.
Claims (2)
1. two-stage loop slurry device that is used for large-scale wet process of FGD, comprise absorption tower, agitator, slush pump, oxidation fan, mechanical demister and one-level spraying layer and secondary spraying layer, it is characterized in that being provided with the venetian blind type pallet between one-level spraying layer and the secondary spraying layer, the lower end of venetian blind type pallet is furnished with pipeline and is connected to the outer slurries case of tower, and the secondary spraying layer is connected to the bottom of the outer slurries case of tower by pipeline.
2. a kind of two-stage loop slurry device that is used for large-scale wet process of FGD according to claim 1 is characterized in that the outer slurries case of tower links to each other by the slurries pond of pipeline with the bottom, absorption tower, is provided with slush pump in the pipeline on the outer slurries case connection of tower absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203191772U CN201586478U (en) | 2009-12-30 | 2009-12-30 | Two-stage slurry circulation device for large-scale wet flue gas desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203191772U CN201586478U (en) | 2009-12-30 | 2009-12-30 | Two-stage slurry circulation device for large-scale wet flue gas desulfurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201586478U true CN201586478U (en) | 2010-09-22 |
Family
ID=42746245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203191772U Expired - Lifetime CN201586478U (en) | 2009-12-30 | 2009-12-30 | Two-stage slurry circulation device for large-scale wet flue gas desulfurization |
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| CN (1) | CN201586478U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341315A (en) * | 2013-07-01 | 2013-10-09 | 中电投远达环保工程有限公司 | Absorption tower with inlet water screen |
| CN104857828A (en) * | 2015-04-22 | 2015-08-26 | 烟台创元热能科技有限公司 | Liquid receiving tray |
| CN105536494A (en) * | 2015-12-30 | 2016-05-04 | 廖厚伍 | Single-tower pH double-region double-circulation desulfurization process |
| CN105593195A (en) * | 2013-11-22 | 2016-05-18 | Lg化学株式会社 | Method for recovering absorption solvent in process for preparing butadiene through oxidative dehydrogenation |
| CN105664703A (en) * | 2016-02-15 | 2016-06-15 | 大唐环境产业集团股份有限公司 | Absorption tower two-stage stirrer device |
| CN106000066A (en) * | 2016-07-01 | 2016-10-12 | 大唐环境产业集团股份有限公司 | Absorbing tower with air introducing device |
| CN108144431A (en) * | 2018-01-04 | 2018-06-12 | 台鹰环境工程有限公司 | High efficient gas and liquid cut-off equipment |
| CN110124501A (en) * | 2019-05-17 | 2019-08-16 | 中国神华能源股份有限公司 | Flue gas purification system and method |
-
2009
- 2009-12-30 CN CN2009203191772U patent/CN201586478U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341315A (en) * | 2013-07-01 | 2013-10-09 | 中电投远达环保工程有限公司 | Absorption tower with inlet water screen |
| CN103341315B (en) * | 2013-07-01 | 2015-02-25 | 中电投远达环保工程有限公司 | Absorption tower with inlet water screen |
| CN105593195A (en) * | 2013-11-22 | 2016-05-18 | Lg化学株式会社 | Method for recovering absorption solvent in process for preparing butadiene through oxidative dehydrogenation |
| US9919260B2 (en) | 2013-11-22 | 2018-03-20 | Lg Chem, Ltd. | Method of recovering absorption solvent in butadiene production process by oxidative dehydrogenation |
| CN105593195B (en) * | 2013-11-22 | 2018-08-28 | Lg化学株式会社 | The method that lyosoption is recycled in the butadiene production by oxidative dehydrogenation |
| CN104857828A (en) * | 2015-04-22 | 2015-08-26 | 烟台创元热能科技有限公司 | Liquid receiving tray |
| CN105536494A (en) * | 2015-12-30 | 2016-05-04 | 廖厚伍 | Single-tower pH double-region double-circulation desulfurization process |
| CN105664703A (en) * | 2016-02-15 | 2016-06-15 | 大唐环境产业集团股份有限公司 | Absorption tower two-stage stirrer device |
| CN106000066A (en) * | 2016-07-01 | 2016-10-12 | 大唐环境产业集团股份有限公司 | Absorbing tower with air introducing device |
| CN108144431A (en) * | 2018-01-04 | 2018-06-12 | 台鹰环境工程有限公司 | High efficient gas and liquid cut-off equipment |
| CN110124501A (en) * | 2019-05-17 | 2019-08-16 | 中国神华能源股份有限公司 | Flue gas purification system and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100922 |
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| CX01 | Expiry of patent term |