CN205252843U - Tail gas denitration absorbing device - Google Patents
Tail gas denitration absorbing device Download PDFInfo
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- CN205252843U CN205252843U CN201521017468.8U CN201521017468U CN205252843U CN 205252843 U CN205252843 U CN 205252843U CN 201521017468 U CN201521017468 U CN 201521017468U CN 205252843 U CN205252843 U CN 205252843U
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Abstract
The utility model relates to a tail gas denitration absorbing device, including the enrichment system, the oxidative system, absorption system, four parts of concentrated system, the oxidative system includes the oxidation tower, ozone generator and flow display ware, the gas outlet of enrichment system is linked together through the pipeline with the bottom air inlet of oxidation tower, absorption system passes through the pipeline by one -level absorption tower and secondary absorption tower and establishes ties mutually and constitute, the one -level absorption tower is linked together through the pipeline with the oxidation tower, and secondary absorption tower upper portion gas outlet is linked together with oxidation tower lower part air inlet, concentrated system mainly includes the concentration tower, the high groove of the centrifugal pump and the concentrated sulfuric acid, centrifugal pump formation pressurized -water pipeline is sent into the absorption liquid in the high groove of rare nitric acid, it flows into concentrated sulfuric acid storage tank to pass through the pipeline through concentrated refrigerated red fuming nitric acid (RFNA). The utility model has the advantages of low cost, absorption efficiency are high, easy operation and do not have secondary pollution, improved tail gas denitration efficiency greatly, can further promote.
Description
Technical field
The utility model relates to exhaust gas processing device field, is specifically related to a kind of tail gas denitration absorption plant.
Background technology
Nitrogen oxide (NOx) as one of major pollutants in atmosphere, be the important root of the series of environmental problems such as city haze weather, photochemical pollution and Atmospheric Acid Deposition. In country's " planning is protected at 12 five rings ", NOxThe pollutant of the implementation overall control after sulfur dioxide will be become. NOxConventionally mainly comprise nitric oxide and nitrogen dioxide, be mainly derived from fuel combustion. According to statistics, the coal-fired nitrogen oxide producing accounts for 67% of national nitrogen oxide emission.
At NOxOn the basis of discharge standard, in order to adapt to the needs of coal-burning power plant of the large traffic characteristic of existing low concentration, aspect tail gas desulphurization denitration, carrying out many research both at home and abroad. Wherein, ZL200810120647.2 is with the ozone O after UV-activated3Or oxydol H2O2In oxidant, the nitric oxide NO in flue gas is oxidized to NO2, then use alkali lye washing flue gas to remove NOxAlthough the oxidation efficiency oxidation object that the method has improved oxidant is still large flow flue gas, therefore operation energy consumption is too high. ZL201020155353.6 uses pneumatic nebulization principle, high-speed gas entrained liquids is sprayed and be broken into droplet, greatly increases the contact area of hand cleanser and gas, has improved NOxAbsorption efficiency, although the method one covering device just can meet the requirement of reaction system and regenerative system simultaneously, for the NO of low concentrationxTreatment effeciency is lower, and equipment operation cost is higher, to the tail gas of the large flow of low concentration inapplicable. ZL200720099983.4 adopts adsorption tower and alkali tank to be in series and neutralizes entering tail gas, thereby plays the effect of double-absorption, has reduced the discharge of tail gas, but exist, absorptivity is not high, alkali consumption large and generation wastewater flow rate is large and difficult treatment.
In sum, the major obstacle of the tail gas denitration of existing coal-burning power plant absorption treatment technology is exactly NOxConcentration is too low, and denitration effect is not ideal enough, and operating procedure is comparatively complicated, and operating cost is higher.
Utility model content
The utility model is intended to overcome the problem that prior art exists, and a kind of tail gas denitration absorption plant is provided simultaneously, and tail gas denitration absorption plant that the utility model provides is with low cost, simple in structure, easy operating, power consumption are low, improves denitration effect.
The utility model solves the scheme that its technical problem adopts: a kind of tail gas denitration absorption plant, comprise enrichment system, oxidative system, absorption system, four parts of concentration systems, enrichment system is by adsorbent bed, steam generator and triple valve composition, oxidative system comprises oxidizing tower, ozone generator and flow indicator, the gas outlet of enrichment system is connected by pipeline with the bottom air inlet of oxidizing tower, absorption system is wanted to be composed in series by pipeline by first grade absorption tower and two-level absorption tower, first grade absorption tower is connected by pipeline with oxidizing tower, and gas outlet, two-level absorption tower top is connected with oxidizing tower bottom air inlet, concentration systems mainly comprises concentration tower, the high groove of centrifugal pump and the concentrated sulfuric acid, centrifugal pump forms setting-out pipeline absorption liquid is sent in the high groove of rare nitric acid, flow into concentrated sulfuric acid storage tank through concentrated cooling red fuming nitric acid (RFNA) by pipeline.
Preferably, the ozone that ozone generator produces is from the top air inlet air inlet of oxidizing tower, NOXDesorption gas is from the bottom air inlet air inlet of oxidizing tower.
Preferably, the adsorbent in adsorbent bed adopts solid heteropoly acid.
Preferably, first grade absorption tower and two-level absorption tower are packed tower, and built-in filler adopts BSH structured packing.
Preferably, the top of first grade absorption tower and two-level absorption tower is equipped with distilled water jet apparatus.
The beneficial effects of the utility model: (1) this tail gas denitration absorption plant is simple in structure, process adsorbent bed is to NOxCarry out adsorption and enrichment, greatly improved NO in tail gasxAbsorption efficiency, adopt the form of two adsorbent bed parallel connections to ensure the continuous operation of device simultaneously, ensured the repeat usage of solid heteropoly acid adsorbent; (2) waste gas that tail gas produces after first grade absorption tower and two-level absorption tower absorption again transport has by the road been got back to oxidative system, has environment is not produced to the advantages such as secondary pollution.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Wherein, 1. enrichment system; 2. tail gas admission line; 3. triple valve; 4. steam generator; 5. adsorbent bed; 6. Waste gas outlet; 7. oxidative system; 8. flow indicator; 9. ozone generator; 10. oxidizing tower; 11. absorption systems; 12. distilled water imports; 13. first grade absorption towers; 14. two-level absorption towers; 15. concentration systems; The high groove of 16. rare nitric acid; The high groove of 17. concentrated sulfuric acid; 18. centrifugal pumps; 19. concentration towers; 20. concentrated sulfuric acid storage tanks; 21. coolers.
Detailed description of the invention
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.
In Fig. 1, a kind of tail gas denitration absorption plant comprises enrichment system 1, oxidative system 7, absorption system 11, 15 4 parts of concentration systems, enrichment system 1 is by adsorbent bed, steam generator 4 and triple valve 3 form, oxidative system 7 comprises oxidizing tower 10, ozone generator 9 and flow indicator 8, the gas outlet of enrichment system 1 is connected by pipeline with the bottom air inlet of oxidizing tower 10, absorption system 11 is wanted to be composed in series by pipeline by first grade absorption tower 13 and two-level absorption tower 14, first grade absorption tower 13 is connected by pipeline with oxidizing tower 10, and two-level absorption tower 14 gas outlets, top are connected with oxidizing tower 10 bottom air inlets, concentration systems 15 mainly comprises concentration tower 19, the high groove 17 of centrifugal pump 18 and the concentrated sulfuric acid, centrifugal pump 18 forms setting-out pipeline absorption liquid is sent in the high groove 16 of rare nitric acid, flow into red fuming nitric acid (RFNA) storage tank 20 through concentrated cooling red fuming nitric acid (RFNA) by pipeline.
Tail gas after desulfurization and dedusting enters enrichment system 1 through admission line 2, enters adsorbent bed 5 utilize the loose structure of solid heteropoly acid to carrying out NO by triple valve 3xAbsorption, in the time that adsorbent bed 3 is penetrated, switch three-way valve 3 enters another adsorbent bed 5, and to ensure the continuous operation of this device, the tail gas after adsorption cleaning is discharged through Waste gas outlet 6. Meanwhile, start steam generator 4 and produce steam, enter adsorbent bed 3-1 to carrying out NO by triple valve 3xDesorption. Entering from the bottom air inlet of oxidizing tower 10 through triple valve 3 after enrichment, the ozone that ozone generator 9 produces enters from the top air inlet of oxidizing tower 10 through the flow indicator 8 with regulating action, makes ozone can fully be oxidized NOxIn NO gas. By the gas bottom air inlet air inlet from first grade absorption tower 13 by pipeline after oxidation, and be provided with spray equipment in its top distilled water import 12, the distilled water of droplet-like can increase and NOxThe contact area of gas reaction, makes absorption process more efficient. The nitric acid that reaction generates is discharged through pipeline from the outlet of bottom, waste gas and unabsorbed NO that reaction generatesxEntering two-level absorption tower 14 by pipeline absorbs again. Use the identical principle of absorption of first grade absorption tower 13 to absorb, the final waste gas that reaction produces flows into oxidative system 7 through triple valve 3, forms reaction cycle, prevents that waste gas from producing secondary pollution. Finally, the rare nitric acid generating from first grade absorption tower 13 and two-level absorption tower 14 flows to centrifugal pump 18 through triple valve 3, the setting-out pipeline that uses centrifugal pump 18 to form is transported into rare nitric acid in the high groove 16 of rare nitric acid, the concentrated sulfuric acid in rare nitric acid and the high groove 17 of the concentrated sulfuric acid is flowed into from top two imports of concentration tower 19 respectively, rare nitric acid is concentrated. The high temperature red fuming nitric acid (RFNA) finally obtaining flows out from concentration tower 19 through pipeline, after coil heat exchanger in subcooler 21 cooling, flows into red fuming nitric acid (RFNA) storage tank 20, obtains having the concentrated sulfuric acid of economic benefit.
Above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the each embodiment technical scheme of the utility model.
Claims (5)
1. a tail gas denitration absorption plant, it is characterized in that: it comprises enrichment system (1), oxidative system (7), absorption system (11), (15) four parts of concentration systems, enrichment system (1) is by adsorbent bed, steam generator (4) and triple valve composition, oxidative system (7) comprises oxidizing tower (10), ozone generator (9) and flow indicator (8), the gas outlet of enrichment system (1) is connected by pipeline with the bottom air inlet of oxidizing tower (10), absorption system (11) is wanted to be composed in series by pipeline by first grade absorption tower (13) and two-level absorption tower (14), first grade absorption tower (13) is connected by pipeline with oxidizing tower (10), and two-level absorption tower (14) gas outlet, top is connected with oxidizing tower (10) bottom air inlet, concentration systems (15) mainly comprises concentration tower (19), centrifugal pump (18) and the high groove of the concentrated sulfuric acid (17), centrifugal pump (18) forms setting-out pipeline absorption liquid is sent in the high groove of rare nitric acid (16), flow into red fuming nitric acid (RFNA) storage tank (20) through concentrated cooling red fuming nitric acid (RFNA) by pipeline.
2. a kind of tail gas denitration absorption plant according to claim 1, is characterized in that: the ozone that ozone generator (9) produces is from the top air inlet air inlet of oxidizing tower (10), NOXDesorption gas is from the bottom air inlet air inlet of oxidizing tower (10).
3. a kind of tail gas denitration absorption plant according to claim 1, is characterized in that: the adsorbent in adsorbent bed (5) adopts solid heteropoly acid.
4. a kind of tail gas denitration absorption plant according to claim 1, is characterized in that: first grade absorption tower (13) and two-level absorption tower (14) are packed tower, and built-in filler adopts BSH structured packing.
5. a kind of tail gas denitration absorption plant according to claim 1, is characterized in that: the top of first grade absorption tower (13) and two-level absorption tower (14) is equipped with distilled water jet apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521017468.8U CN205252843U (en) | 2015-12-10 | 2015-12-10 | Tail gas denitration absorbing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521017468.8U CN205252843U (en) | 2015-12-10 | 2015-12-10 | Tail gas denitration absorbing device |
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| Publication Number | Publication Date |
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| CN205252843U true CN205252843U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521017468.8U Expired - Fee Related CN205252843U (en) | 2015-12-10 | 2015-12-10 | Tail gas denitration absorbing device |
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| CN (1) | CN205252843U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107638801A (en) * | 2017-10-30 | 2018-01-30 | 江苏科行环保科技有限公司 | The low emission technique and complexes of pollutant in garbage power generation boiler flue gas |
| CN114618270A (en) * | 2022-03-07 | 2022-06-14 | 大连汉诺工程技术有限公司 | Containing NOxTail gas normal-temperature denitration device and method |
-
2015
- 2015-12-10 CN CN201521017468.8U patent/CN205252843U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107638801A (en) * | 2017-10-30 | 2018-01-30 | 江苏科行环保科技有限公司 | The low emission technique and complexes of pollutant in garbage power generation boiler flue gas |
| CN114618270A (en) * | 2022-03-07 | 2022-06-14 | 大连汉诺工程技术有限公司 | Containing NOxTail gas normal-temperature denitration device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20161210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |