CN203862097U - Device for recycling NOx - Google Patents
Device for recycling NOx Download PDFInfo
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- CN203862097U CN203862097U CN201420235643.XU CN201420235643U CN203862097U CN 203862097 U CN203862097 U CN 203862097U CN 201420235643 U CN201420235643 U CN 201420235643U CN 203862097 U CN203862097 U CN 203862097U
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- nox
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Abstract
The utility model relates to a device for recycling NOx, and belongs to the field of boiler tail gas processing. The device is characterized by comprising an absorption tower and a regeneration slot which are connected with each other, wherein a baffle and a downcomer are arranged at the bottom of the absorption tower; an air hole is formed by the baffle, the downcomer and a tower bottom liquid phase interface to collect NOx gas dynamically absorbed by an absorption liquid; an electrolyzer is arranged inside the regeneration slot; an air cavity formed by the liquid level and the wall surface of the regeneration slot is also used for collecting and analyzing gas; the NOx gas absorbed by the absorption liquid is further analyzed when the absorption liquid passes by, so that the absorption liquid is regenerated. The device has the benefits that the baffle and the downcomer are arranged at the bottom of the absorption tower, the absorption liquid with a formula is combined, and the NOx can be recycled during the process of dynamic absorption and analysis; the device is ingenious in design, achieves the purposes of dust removing, desulfuration, denitration and NOx recycling, less in system investment, stable and reliable in operation, small in the consumption of resources and energy, and high in byproduct value.
Description
Technical field
The utility model belongs to boiler exhaust gas process field.The present invention relates to the device of a kind of NOx of recovery, more particularly, is a kind of NOx in flue gas that absorbs in absorption tower with absorbent, and then NOx reclaims by parsing, and absorption liquid obtains the equipment of regeneration simultaneously.
Background technology
That current flue gas desulfurization and denitrification mainly adopts is " wet flue gas desulfurization (Wet-FGD) and NH
3the denitration of SCR (SCR) technology ", to removing of sulfureous in flue gas, nitrogen pollutant, be to carry out respectively in different devices and flow process, take large quantity space, consume ammonia, by-product gypsum is worth low, and investment is large, and operating cost is high.The existence of these problems, restriction Gai Fa China applies.Therefore, urgently research and development are unified in the high-efficiency desulfurization denitration technology carrying out in same technological process, particularly do not consume ammonia and can reclaim technique and the equipment of NOx.
In prior art, utility model patent ZL201020642632.5 discloses a kind of smoke purifier, it relates to environmental unit technical field, its upper end, absorption tower is provided with exhaust outlet, the lower end of exhaust outlet is provided with demister, demister lower end is provided with netted deflector, and the lower end of netted deflector is provided with vaporific nozzle, and bottom, absorption tower is provided with absorption liquid; The lower end side on absorption tower is provided with air inlet, and bottom, absorption tower is provided with note ammonia point, and note ammonia point upper end is provided with and the inner absorption liquid supply pump being connected in absorption tower, and absorption liquid supply pump is connected with drying-granulating system, vaporific nozzle and netted deflector respectively.This utility model is by (NH
4)
2sO
3solution carries out deep oxidation, and with respect to traditional ammonia process, energy consumption decreases, and clean-up effect is better, but is only desulfurization, does not possess the function of denitration.
Patent CN 202620999 U disclose a kind of desulfurization and denitrification integral flue gas purification system, comprise interconnective flue gas input system, smoke absorption cleaning system and clean flue gas emission, wherein, also comprise the flue gas oxidative system being connected with described flue gas input system, the concentration systems being connected with flue gas input system and the slurries treatment system being connected with described concentration systems, the slurries oxidative system being connected with smoke absorption cleaning system and absorbent induction system.This utility model realizes the desulfurization and denitrification integral of flue gas, and later stage product is made full use of, but system complex is particularly poor efficiency to flue gas direct oxidation mode, and the oxidation of potassium sulfite in liquid phase has been taked to traditional approach, is also poor efficiency.
Summary of the invention
Large for the investment of Wet-FGD+SCR combination desulphurization denitration, operating cost is high, need to consume higher ammonia, the by-product of value and be worth low shortcoming, the utility model proposes the device of a kind of NOx of recovery, this device is reasonable in design, reach dedusting, desulphurization denitration reclaim the object of NOx simultaneously, system small investment, stable and reliable operation, resources and energy consumption are few, and by-product is worth high.
A kind of device that reclaims NOx, comprise interconnective absorption tower and regeneration tank, in bottom, described absorption tower, dividing plate and downspout are set, form with liquid interface at the bottom of tower the NOx gas that air pocket dynamically absorbs to collect absorption liquid, in described regeneration tank, electrolysis unit is set, the air cavity that the wall of liquid level and regeneration tank forms is also for collecting parsing gas, the NOx gas absorbing through out-of-date further parsing absorption liquid at absorption liquid, and absorption liquid obtains regeneration;
In described absorption tower, air inlet is upwards disposed with under absorption tower pallet, three grades of absorption tower spraying layers, demister on flushing water layer, one-level demister, demister flushing water layer, secondary demister under flushing water layer, demister, in described absorption tower, air inlet is disposed with dividing plate, downspout, liquid phase region downwards, and dividing plate, downspout, liquid phase region and absorber tower cylinder wall form air pocket jointly; Described absorption tower interface has gas approach, spray liquid import, exhanst gas outlet, flushing water import, absorption tower and regeneration tank connector, air pocket outlet; Described air pocket and the external world are connected to while taking air suction mode to reclaim NOx gas and only need an outlet, need set up air pocket import and air pocket outlet when NOx gas is taken in air blast out of separately;
Described regeneration tank is divided into San Ge district: electrolysis zone, air cavity area and sedimentation stiff district; Described regeneration tank interface has absorption tower and regeneration tank connector, dilute slurry outlet, the outlet of underflow liquid, air cavity to export; Described air cavity and the external world are connected to while taking air suction mode to reclaim NOx gas and only need an outlet, need set up air cavity import and air cavity outlet when NOx gas is taken in air blast out of separately.
Application the utility model reclaims NOx, comprises the following steps:
(1), SO in flue gas
2absorption with NOx
Flue gas enters absorption tower from gas approach, with formulation absorption agent, in spray district, absorption tower, absorbs NOx in flue gas, SO
2;
(2), the parsing recovery of NOx and the regeneration of absorption liquid
Air pocket in absorption tower and the air cavity of regeneration tank are collected the parsing gas of absorption liquid, extract the NOx gas of resolving out reclaim by vavuum pump; Through resolving the absorption liquid of NOx gas, obtain the ability that continues to absorb NOx gas, regenerated.
(3), sulphur and ash content removes
The sulfate and the ash content in flue gas that absorb gained sulphite and partial oxidation formation leave system from regeneration tank underflow liquid zone.
The above formulation absorption agent is different, can form the concrete technology of different characteristics.
The utility model be embodied in following some:
(1) this device is reasonable in design, reaches dedusting, desulphurization denitration reclaim the object of NOx simultaneously, and system small investment, stable and reliable operation, resources and energy consumption are few, and by-product is worth high.
(2) in bottom, absorption tower, dividing plate and downspout are set, combined formulation absorption liquid is reached the fancy effect that reclaims NOx in the process that dynamically absorbs and resolve.
(3) electrolysis unit is set in regeneration tank, the NOx gas absorbing through out-of-date further parsing absorption liquid at absorption liquid, and make absorption liquid obtain regeneration; Sedimentation stiff district is set in regeneration tank, solves the difficulty of solid precipitation thing separation.
(4) this method is collected and is reclaimed NOx, then it be oxidized to absorption, not only easy but also can prepare nitric acid; To desulfurization product also obstructed air oxidation, on the one hand reduce operating cost, open up on the other hand by-product wider utilize space.
Accompanying drawing explanation
Accompanying drawing 1 is device structure schematic diagram of the present utility model
1-desulphurization denitration absorption tower in Fig. 1,2-regeneration tank, 3-dividing plate, 4-downspout, 5-electrolysis unit, 6-air pocket, 7-air cavity, 8-sedimentation stiff district, 9-absorption tower pallet, 10-absorption tower spraying layer, 11-absorption tower spraying layer, 12-absorption tower spraying layer, flushing water layer under 13-demister, 14-one-level demister, flushing water layer on 15-demister, flushing water layer under 16-demister, 17-secondary demister; A-gas approach, the import of b1～b3-spray liquid, c-exhanst gas outlet, the import of d-flushing water, e-absorption tower and regeneration tank connector, the outlet of f-underflow liquid, the outlet of g-dilute slurry, the outlet of h-air cavity, the outlet of i-air pocket.
The specific embodiment
Embodiment 1
As shown in Figure 1, employing lime stone is raw material, a kind of device that reclaims NOx of application the utility model, comprise interconnective desulphurization denitration absorption tower 1 and regeneration tank 2, in bottom, described absorption tower, dividing plate 3 and downspout 4 are set, form with liquid phase at the bottom of tower the NOx gas that air pocket 6 dynamically absorbs to collect absorption liquid, electrolysis unit 5 is set in described regeneration tank, the air cavity 7 that the wall of liquid level and regeneration tank forms is also for collecting parsing gas, the NOx gas absorbing through out-of-date further parsing absorption liquid at absorption liquid, absorption liquid obtains regeneration;
In described absorption tower, air inlet is upwards disposed with under absorption tower pallet 9, absorption tower spraying layer 10～12, demister on flushing water layer 13, one-level demister 14, demister flushing water layer 16, secondary demister 17 under flushing water layer 15, demister, in described absorption tower, air inlet is disposed with dividing plate 3, downspout 4, liquid phase region downwards, and dividing plate 3, downspout 4, liquid phase region and absorber tower cylinder wall form air pocket 6 jointly; Described absorption tower interface has gas approach a, spray liquid import b1～b3, exhanst gas outlet c, flushing water import d, absorption tower and regeneration tank connector e, air pocket outlet i; Described air pocket 6 and the external world are connected to while taking air suction mode to reclaim NOx gas and only need an outlet, when NOx gas is taken in air blast out of, need set up import and outlet separately;
Described regeneration tank is divided into San Ge district: electrolysis unit 5th district, air cavity 7th district and sedimentation stiff district 8; Described regeneration tank interface has absorption tower and regeneration tank connector e, dilute slurry outlet g, underflow liquid outlet f, air cavity 7 and extraneous connector; Described air cavity 7 and the external world are connected to while taking air suction mode to reclaim NOx gas and only need an outlet, when NOx gas is taken in air blast out of, need set up import and outlet separately.
Application the utility model reclaims NOx, comprises the following steps:
(1), SO in flue gas
2absorption with NOx
Flue gas enters desulphurization denitration absorption tower 1 from gas approach a, with formula solution, at spray district, absorption tower b1～b3, absorbs NOx in flue gas, SO
2;
(2), the parsing recovery of NOx and the regeneration of absorption liquid
Air pocket 6 in absorption tower and the air cavity of regeneration tank 7 are collected the parsing gas of absorption liquid, extract the NOx gas of resolving out reclaim by vavuum pump; Through resolving the absorption liquid of NOx gas, obtain the ability that continues to absorb NOx gas, regenerated.
(3), sulphur and ash content removes
The sulfate and the ash content in flue gas that absorb gained sulphite and partial oxidation formation leave system from regeneration tank underflow liquid outlet f.
Described absorbent formula: calcium carbonate concentration 1%, ammonium sulfate concentrations 25%, ferrous sulfate concentration 0.4%, complexones concentration 0.4%, glycerol concentration 5%; Electrolysis is to make electrode with graphite, passes into direct current, voltage 1V.
Implementation result: desulfurization degree >=95%, denitration rate >=90%, the NOx rate of recovery >=85%, made whisker draw ratio >=50.
Embodiment 2
As shown in Figure 1, employing sodium carbonate is raw material, a kind of device that reclaims NOx of application the utility model, and its equipment and step are with embodiment 1.
Described absorbent formula: sodium carbonate 10%.
Implementation result: desulfurization degree >=99%, denitration rate >=90%, the NOx rate of recovery >=85%.
Embodiment 3
As shown in Figure 1, employing sodium sulfite is raw material, denitration separately, and a kind of device that reclaims NOx of application the utility model, its equipment and step are with embodiment 1.
Described absorbent formula: sodium sulfite 10%.
Implementation result: denitration rate >=90%, the NOx rate of recovery >=85%.
The invention has the beneficial effects as follows: in bottom, absorption tower, dividing plate and downspout are set, combined formulation absorption liquid, in the process that dynamically absorbs and resolve, reach and reclaim NOx, device design is ingenious, reach dedusting, desulphurization denitration reclaim the object of NOx simultaneously, system small investment, stable and reliable operation, resources and energy consumption are few, and by-product is worth high.
The utility model is not limited to above-mentioned embodiment, those skilled in the art make to any apparent improvement of above-mentioned embodiment or change, can not exceed the protection domain of design of the present utility model and claims.
Claims (2)
1. a device that reclaims NOx, it is characterized in that: comprise interconnective absorption tower and regeneration tank, in bottom, described absorption tower, dividing plate and downspout are set, form with liquid interface at the bottom of tower the NOx gas that air pocket dynamically absorbs to collect absorption liquid, in described regeneration tank, electrolysis unit is set, the air cavity that the wall of liquid level and regeneration tank forms is also for collecting parsing gas, the NOx gas absorbing through out-of-date further parsing absorption liquid at absorption liquid, and absorption liquid obtains regeneration.
2. the device of recovery according to claim 1 NOx, it is characterized in that: in described absorption tower, air inlet is upwards disposed with under absorption tower pallet, three grades of absorption tower spraying layers, demister on flushing water layer, one-level demister, demister flushing water layer, secondary demister under flushing water layer, demister, in described absorption tower, air inlet is disposed with dividing plate, downspout, liquid phase region downwards, and dividing plate, downspout, liquid phase region and absorber tower cylinder wall form air pocket jointly; Described absorption tower interface has gas approach, spray liquid import, exhanst gas outlet, flushing water import, absorption tower and regeneration tank connector, air pocket outlet; Described air pocket and the external world are connected to while taking air suction mode to reclaim NOx gas and only need an outlet, need set up air pocket import and air pocket outlet when NOx gas is taken in air blast out of separately;
Described regeneration tank is divided into San Ge district: electrolysis zone, air cavity area and sedimentation stiff district; Described regeneration tank interface has absorption tower and regeneration tank connector, dilute slurry outlet, the outlet of underflow liquid, air cavity to export; Described air cavity and the external world are connected to while taking air suction mode to reclaim NOx gas and only need an outlet, need set up air cavity import and air cavity outlet when NOx gas is taken in air blast out of separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235643.XU CN203862097U (en) | 2014-05-05 | 2014-05-05 | Device for recycling NOx |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235643.XU CN203862097U (en) | 2014-05-05 | 2014-05-05 | Device for recycling NOx |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203862097U true CN203862097U (en) | 2014-10-08 |
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ID=51643088
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420235643.XU Expired - Fee Related CN203862097U (en) | 2014-05-05 | 2014-05-05 | Device for recycling NOx |
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| CN (1) | CN203862097U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498523A (en) * | 2015-12-11 | 2016-04-20 | 天紫工程管理（天津）有限公司 | Waste gas treatment system |
| CN112940818A (en) * | 2021-02-05 | 2021-06-11 | 北京中科润宇环保科技股份有限公司 | Device and method for desulfurizing and deodorizing methane |
-
2014
- 2014-05-05 CN CN201420235643.XU patent/CN203862097U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498523A (en) * | 2015-12-11 | 2016-04-20 | 天紫工程管理（天津）有限公司 | Waste gas treatment system |
| CN112940818A (en) * | 2021-02-05 | 2021-06-11 | 北京中科润宇环保科技股份有限公司 | Device and method for desulfurizing and deodorizing methane |
| CN112940818B (en) * | 2021-02-05 | 2021-08-24 | 北京中科润宇环保科技股份有限公司 | Device and method for desulfurizing and deodorizing methane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20170505 |