CN102872693A - Processing method of waste nitric acid fume and device thereof - Google Patents
Processing method of waste nitric acid fume and device thereof Download PDFInfo
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- CN102872693A CN102872693A CN2011101913992A CN201110191399A CN102872693A CN 102872693 A CN102872693 A CN 102872693A CN 2011101913992 A CN2011101913992 A CN 2011101913992A CN 201110191399 A CN201110191399 A CN 201110191399A CN 102872693 A CN102872693 A CN 102872693A
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Abstract
The invention discloses a processing method of waste nitric acid fume, comprising the following steps: 1) introducing waste nitric acid fume into a main absorbing tower so as to perform first integrated reaction between the waste nitric acid fume and an introduced medicine, wherein the medicine is sprayed in the motion direction of the waste nitric acid fume through spray equipment when the integrated reaction is performed, and during the first integrated reaction, a filter pack is used for deceleration of the waste gas, uniform distribution of the sprayed medicine and complete reaction; 2) arranging a hollow layer in the main absorbing tower, allowing the waste gas to pass through the hollow layer, and performing a second integrated reaction between the waste gas and the medicine introduced in the main absorbing tower; and 3) introducing the waste gas from the main absorbing tower into an auxiliary absorbing tower so as to perform reaction and absorption again in the auxiliary absorbing tower, and discharging into the atmosphere through a chimney. The invention also discloses a treatment device. By the adoption of the treatment device provided by the invention, acid fog and acid gas in the waste gas can be rapidly and thoroughly absorbed through reactions. The device has a simple structure, and is energy saving and environmentally friendly.
Description
Technical field
The present invention relates to surface treatment workshop acid mist processing technology field, is a kind of processing method of nitric acid mist waste gas and the technology of device thereof specifically.
Background technology
In aluminium bar founding, section bar extruding, surface treatment, deep processing, the acid mist that its surface treatment (anodic oxidation) produces generally through the ammonia neutralization, is discharged in the atmosphere after the repeatedly spray of acid ﹠ alkali liquid, the neutralisation treatment.Although this technique can be processed the acid mist of the overwhelming majority,, when exhaust gas volumn was large, neutralization reaction was insufficient, and the acid mist of part yellow is intermittent emerging still, and the intrinsic penetrating odor of ammonia also can be at the low time period meeting contaminated air of air pressure.This acid mist knows that according to the actual production analysis it mainly contains sulfuric acid, phosphoric acid, nitric acid, nitrous acid mixes the acid mist that forms with water, also has a certain amount of nitrogen oxide (NO, NO2 etc.), wherein process acidic liquid and sour gas, available ammonia, ammoniacal liquor, liquid caustic soda (sodium hydrate aqueous solution), or the mixed liquor of ammoniacal liquor and liquid caustic soda, can adopt spray column or packed tower, because sour gas to be processed is in (about 3 seconds) in the short time relatively more difficult thoroughly reaction, absorb fully, in the prior art, remove acid mist, the acid gas main equipment has spray column, plate column, the towers such as packed tower, all types of equipment all can reach 80～90% the efficient of removing when parameter designing is reasonable, appoint so not meet environmental requirement, although and spray column simple in structure, but cost is lower, the pressure loss is little, and required fan energy consumption is low, and operating flexibility is large, stable, but gas liquid ratio need to be larger; It is higher that plate column behaviour does efficient, but operating flexibility is less, is not suitable for air quantity variation occasion greatly; Packed tower treatment effeciency ratio sprays tower height but filler involves great expense, and generally is applicable to little air quantity engineering.
Summary of the invention
The processing method that the purpose of this invention is to provide a kind of nitric acid mist waste gas, reactive absorption falls acid mist, the acid gas in the waste gas rapidly and thoroughly, and is simple in structure, energy-conserving and environment-protective.The present invention also provides a kind for the treatment of apparatus of nitric acid mist waste gas.
Purpose of the present invention is achieved through the following technical solutions.
A kind of processing method of nitric acid mist waste gas comprises the following steps:
1) nitric acid mist waste gas is introduced in the main absorption tower, in main absorption tower, for the first time combined reaction is occured in nitric acid mist waste gas and the medicament of introducing in the main absorption tower simultaneously, medicament is facing to the direction of motion of the nitric acid mist waste gas spray that liquidates by sprinkling equipment when combined reaction occurs, and in the combined reaction first time, adopted packing layer to the waste gas deceleration and the medicament of spray is evenly distributed, fully reaction;
2) hollow layer is set in main absorption tower, pass through hollow layer through the nitric acid mist waste gas after for the first time combined reaction, with the medicament of introducing in the main absorption tower for the second time combined reaction occurs again, medicament is facing to the direction of motion of the nitric acid mist waste gas spray that liquidates by sprinkling equipment when for the second time combined reaction occurs, and in the combined reaction second time, adopted packing layer that waste gas is slowed down, increase reaction compartment and time, and make waste gas not produce turbulent flow;
3) will introduce again a secondary absorption tower from main absorption tower waste gas out, and in secondary absorption tower, react again and absorb to process again, finally by smoke stack emission in atmosphere.
Medicament when react on described secondary absorption tower again is facing to the direction of motion of the waste gas spray that liquidates by sprinkling equipment.
Described medicament is alkaline medicinal liquid, has also added the tobacco adsorbent in alkaline medicinal liquid, makes the gaseous mixture of discharging from throat at last not be with steam.
Bottom and top in the described main absorption tower are respectively equipped with bottom space and headroom, and the bottom in secondary absorption tower and top are respectively equipped with bottom space and headroom.
A kind of device of processing method of nitric acid mist waste gas, comprise the first absorption tower, second absorption tower, circulating water pool and alkaline water elevator pump, be connected with the waste gas pipeline road between the top on the first absorption tower and the bottom of second absorption tower, the top of second absorption tower is equipped with chimney, that the first spraying filler layer and the second spraying filler layer are installed successively from bottom to top in the first absorption tower, be provided with a hollow region between the first spraying filler layer and the second spraying filler layer, the first spraying filler layer and bottom surface, the first absorption tower form a bottom space, the second spraying filler layer and the first absorption tower end face form a headroom, in the bottom on the first absorption tower the exhaust input tube road is installed, the exhaust input tube road is communicated with the bottom space of the below of the first spraying filler layer, in second absorption tower, be equipped with between the first spraying filler layer and a packing layer and the two and be provided with a hollow region, the first spraying filler layer in the first absorption tower and the second spraying filler layer consist of by spray system in the tower and porous plastic cement packing layer, the first spraying filler layer in the second absorption tower is made of spray system in the tower and porous plastic cement packing layer, packing layer in the second absorption tower is made of the first absorption tower porous plastic cement packing layer, spray system is respectively by spray piping and circulating water pool in the tower in the second absorption tower, the alkaline water elevator pump is connected to form the water circulation pipe system.
The present invention compared with prior art has the following advantages:
The present invention is owing to having adopted the two-in-one main absorption tower of spray and filler, waste gas is successively carried out combined reaction, and medicament is facing to the direction of motion of the nitric acid mist waste gas spray that liquidates by sprinkling equipment when combined reaction occurs, in combined reaction, adopted packing layer to the waste gas deceleration and the medicament of spray is evenly distributed, and hollow layer is set further waste gas is slowed down, increase reaction compartment and time, and make waste gas not produce turbulent flow, then will introduce again a secondary absorption tower from main absorption tower waste gas out, in secondary absorption tower, react again and absorb again and process, finally by smoke stack emission in atmosphere, this shows, the present invention rapidly and thoroughly reactive absorption falls acid mist in the waste gas, acid gas, energy-conserving and environment-protective.
The first spraying filler layer on the first absorption tower in the treating apparatus among the present invention, spray liquidates, and slows down, evenly distribute fully combined reaction, its hollow layer, malleation, pressure is low, has deceleration, increases reaction compartment and time, does not produce turbulent function, the second spraying filler layer, same spray liquidates, slow down, evenly distribute, fully combined reaction; The first spraying filler layer in the second absorption tower is auxiliary layer, absorbs for the second time and carry out water to purify, by packing layer water filtration is fallen behind hollow layer, this device structure is simple again, and cost of investment is low, can well realize aforesaid treatment technology scheme, have equally the advantage of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the treating apparatus structural representation of nitric acid mist waste gas of the present invention.
The specific embodiment
A kind of processing method of nitric acid mist waste gas comprises the following steps:
1) nitric acid mist waste gas is introduced in the main absorption tower, in main absorption tower, for the first time combined reaction is occured in nitric acid mist waste gas and the medicament of introducing in the main absorption tower simultaneously, medicament is facing to the direction of motion of the nitric acid mist waste gas spray that liquidates by sprinkling equipment when combined reaction occurs, and in the combined reaction first time, adopted packing layer to the waste gas deceleration and the medicament of spray is evenly distributed, fully reaction;
2) hollow layer being set in main absorption tower slows down to waste gas, increase reaction compartment and time, and make waste gas not produce turbulent flow, nitric acid mist waste gas after for the first time combined reaction of process namely is that sprinkling equipment and packing layer are not installed by hollow layer, with the medicament of introducing in the main absorption tower for the second time combined reaction occurs again, medicament is facing to the direction of motion of the nitric acid mist waste gas spray that liquidates by sprinkling equipment when for the second time combined reaction occurs, and in the combined reaction second time, adopted packing layer that waste gas is slowed down, increase reaction compartment and time, and make waste gas not produce turbulent flow;
3) will introduce again a secondary absorption tower from main absorption tower waste gas out, and in secondary absorption tower, react again and absorb to process again, finally by smoke stack emission in atmosphere.Medicament when react on secondary absorption tower again is facing to the direction of motion of the waste gas spray that liquidates by sprinkling equipment.
Its Chinese medicine is alkaline medicinal liquid, has also added the tobacco adsorbent in alkaline medicinal liquid, makes the gaseous mixture of discharging from throat at last not be with steam.
Bottom in main absorption tower and top are respectively equipped with bottom space and headroom, and the bottom in secondary absorption tower and top are respectively equipped with bottom space and headroom.
Be described in further detail below in conjunction with the treating apparatus of accompanying drawing to nitric acid mist waste gas of the present invention.
Such as Fig. 1, the treating apparatus of nitric acid mist waste gas of the present invention, comprise the first absorption tower 1, second absorption tower 2, circulating water pool 3 and alkaline water elevator pump 4, be connected with waste gas pipeline road 5 between the bottom of the top on the first absorption tower 1 and second absorption tower 2, the top of second absorption tower 2 is equipped with chimney 6, that the first spraying filler layer 11 and the second spraying filler layer 12 are installed successively from bottom to top in the first absorption tower 1, be provided with a hollow region 13 between the first spraying filler layer 11 and the second spraying filler layer 12, the first spraying filler layer 11 and bottom surface, the first absorption tower form a bottom space 14, the second spraying filler layer 12 and the first absorption tower end face form a headroom 15, in the bottom on the first absorption tower exhaust input tube road 7 is installed, exhaust input tube road 7 is communicated with the bottom space 14 of the below of the first spraying filler layer, in second absorption tower 2, be equipped with between the first spraying filler layer 21 and a packing layer 22 and the two and be provided with a hollow region 23, the first spraying filler layer 21 forms a bottom space 24 with the bottom surface of second absorption tower 2, packing layer 22 forms a headroom 25 with the end face of second absorption tower 2, the first spraying filler layer in the first absorption tower and the second spraying filler layer consist of by spray system in the tower and porous plastic cement packing layer, the first spraying filler layer in the second absorption tower is made of spray system in the tower and porous plastic cement packing layer, packing layer in the second absorption tower is made of the first absorption tower porous plastic cement packing layer, spray system is respectively by spray piping 8 and circulating water pool in the tower in the second absorption tower, the alkaline water elevator pump is connected to form the water circulation pipe system.
Spray system is positioned at the top of porous plastic cement packing layer in the tower in the first spraying filler layer in the first spraying filler layer in the first absorption tower, the second spraying filler layer, the second absorption tower, porous plastic cement packing layer includes the plastic cement filling tube of evenly arranging, each plastic cement filling tube is by stack shell and be distributed on a vane group in the cylinder and consist of and be provided with at least two-layer vane group, blade between two-layer up and down staggers mutually, and the stack shell wall of corresponding every one deck vane group is provided with through hole.Porous plastic cement packing layer is 2 meters thickness.Before entering described exhaust input tube road, gas skirt is installed.
The first absorption tower 1: bottom space, malleation, pressure is high; The first spraying filler layer: spray liquidates, and slows down, and evenly distributes fully combined reaction; Hollow layer, malleation, pressure is low, so that waste gas slows down, increases reaction compartment and time, do not produce turbulent flow; The second spraying filler layer, spray liquidates, and slows down, and evenly distributes fully combined reaction; Headroom, negative pressure.
Second absorption tower 2: bottom space; The first spraying filler layer is auxiliary layer, absorbs for the second time, and water purifies; Hollow layer; Packing layer, water filtration.
Claims (5)
1. the processing method of a nitric acid mist waste gas comprises the following steps:
1) nitric acid mist waste gas is introduced in the main absorption tower, in main absorption tower, for the first time combined reaction is occured in nitric acid mist waste gas and the medicament of introducing in the main absorption tower simultaneously, medicament is facing to the direction of motion of the nitric acid mist waste gas spray that liquidates by sprinkling equipment when combined reaction occurs, and in the combined reaction first time, adopted packing layer to the waste gas deceleration and the medicament of spray is evenly distributed, fully reaction;
2) hollow layer is set in main absorption tower, pass through hollow layer through the nitric acid mist waste gas after for the first time combined reaction, with the medicament of introducing in the main absorption tower for the second time combined reaction occurs again, medicament is facing to the direction of motion of the nitric acid mist waste gas spray that liquidates by sprinkling equipment when for the second time combined reaction occurs, and in the combined reaction second time, adopted packing layer that waste gas is slowed down, increase reaction compartment and time, and make waste gas not produce turbulent flow;
3) will introduce again a secondary absorption tower from main absorption tower waste gas out, and in secondary absorption tower, react again and absorb to process again, finally by smoke stack emission in atmosphere.
2. the processing method of nitric acid mist waste gas according to claim 1 is characterized in that: the medicament when react on described secondary absorption tower again is facing to the direction of motion of the waste gas spray that liquidates by sprinkling equipment.
3. the processing method of nitric acid mist waste gas according to claim 1, it is characterized in that: described medicament is alkaline medicinal liquid, has also added the tobacco adsorbent in alkaline medicinal liquid, makes the gaseous mixture of discharging from throat at last not be with steam.
4. the processing method of nitric acid mist waste gas according to claim 1, it is characterized in that: bottom and top in the described main absorption tower are respectively equipped with bottom space and headroom, and the bottom in secondary absorption tower and top are respectively equipped with bottom space and headroom.
5. the device of the processing method of a nitric acid mist waste gas according to claim 4, comprise the first absorption tower, second absorption tower, circulating water pool and alkaline water elevator pump, be connected with the waste gas pipeline road between the top on the first absorption tower and the bottom of second absorption tower, the top of second absorption tower is equipped with chimney, the first spraying filler layer and the second spraying filler layer are installed in the first absorption tower from bottom to top successively, be provided with a hollow region between the first spraying filler layer and the second spraying filler layer, the first spraying filler layer and bottom surface, the first absorption tower form a bottom space, the second spraying filler layer and the first absorption tower end face form a headroom, in the bottom on the first absorption tower the exhaust input tube road is installed, the exhaust input tube road is communicated with the bottom space of the below of the first spraying filler layer, in second absorption tower, be equipped with between the first spraying filler layer and a packing layer and the two and be provided with a hollow region, the first spraying filler layer in the first absorption tower and the second spraying filler layer consist of by spray system in the tower and porous plastic cement packing layer, the first spraying filler layer in the second absorption tower is made of spray system in the tower and porous plastic cement packing layer, packing layer in the second absorption tower is made of the first absorption tower porous plastic cement packing layer, spray system is respectively by spray piping and circulating water pool in the tower in the second absorption tower, the alkaline water elevator pump is connected to form the water circulation pipe system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110191399.2A CN102872693B (en) | 2011-07-10 | 2011-07-10 | Processing method of waste nitric acid fume and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110191399.2A CN102872693B (en) | 2011-07-10 | 2011-07-10 | Processing method of waste nitric acid fume and device thereof |
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| Publication Number | Publication Date |
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| CN102872693A true CN102872693A (en) | 2013-01-16 |
| CN102872693B CN102872693B (en) | 2014-11-26 |
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| CN201110191399.2A Expired - Fee Related CN102872693B (en) | 2011-07-10 | 2011-07-10 | Processing method of waste nitric acid fume and device thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233603A (en) * | 2015-10-13 | 2016-01-13 | 安徽省绿巨人环境技术有限公司 | Treatment device and method for waste gas containing acid mist |
| CN109893982A (en) * | 2017-12-07 | 2019-06-18 | 孙兵 | A kind of efficient denitrifying device for pulverized-coal fired boiler |
| CN114950053A (en) * | 2022-05-18 | 2022-08-30 | 鞍山科德轧辊表面处理有限公司 | Chromium plating electroplating waste gas treatment device and method |
| CN117000018A (en) * | 2023-09-28 | 2023-11-07 | 福建德尔科技股份有限公司 | Alkali liquor spray tower for chloride treatment and application method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS62155921A (en) * | 1985-12-27 | 1987-07-10 | Seiko Kakoki Kk | Method for removing aerosol-like white smoke |
| CN201079731Y (en) * | 2007-09-03 | 2008-07-02 | 上虞市玻璃纸有限公司 | Waste gas washing absorber in glass paper production process |
| CN202179927U (en) * | 2011-07-10 | 2012-04-04 | 台澳铝业（台山）有限公司 | Device for treating waste gas containing nitric acid mist |
-
2011
- 2011-07-10 CN CN201110191399.2A patent/CN102872693B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62155921A (en) * | 1985-12-27 | 1987-07-10 | Seiko Kakoki Kk | Method for removing aerosol-like white smoke |
| CN201079731Y (en) * | 2007-09-03 | 2008-07-02 | 上虞市玻璃纸有限公司 | Waste gas washing absorber in glass paper production process |
| CN202179927U (en) * | 2011-07-10 | 2012-04-04 | 台澳铝业（台山）有限公司 | Device for treating waste gas containing nitric acid mist |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233603A (en) * | 2015-10-13 | 2016-01-13 | 安徽省绿巨人环境技术有限公司 | Treatment device and method for waste gas containing acid mist |
| CN109893982A (en) * | 2017-12-07 | 2019-06-18 | 孙兵 | A kind of efficient denitrifying device for pulverized-coal fired boiler |
| CN114950053A (en) * | 2022-05-18 | 2022-08-30 | 鞍山科德轧辊表面处理有限公司 | Chromium plating electroplating waste gas treatment device and method |
| CN117000018A (en) * | 2023-09-28 | 2023-11-07 | 福建德尔科技股份有限公司 | Alkali liquor spray tower for chloride treatment and application method thereof |
| CN117000018B (en) * | 2023-09-28 | 2023-12-19 | 福建德尔科技股份有限公司 | Alkali liquor spray tower for chloride treatment and application method thereof |
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| CN102872693B (en) | 2014-11-26 |
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Granted publication date: 20141126 Termination date: 20160710 |