CN107596884A - The processing method and processing device of waste gas on a kind of steel band pickling line - Google Patents
The processing method and processing device of waste gas on a kind of steel band pickling line Download PDFInfo
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- CN107596884A CN107596884A CN201710878354.XA CN201710878354A CN107596884A CN 107596884 A CN107596884 A CN 107596884A CN 201710878354 A CN201710878354 A CN 201710878354A CN 107596884 A CN107596884 A CN 107596884A
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- gas
- waste gas
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- heat exchanger
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention discloses a kind of processing method and processing device of waste gas on steel band pickling line, the described method comprises the following steps：1) waste gas of collection is passed through combustion chamber, in the combustion chamber, high-temp combustion is carried out to the waste gas；2) gas after burning is sufficiently mixed with urea, forms mixed gas；3) by the mixed gas pass through with catalyst haptoreaction, obtain the second mixed gas；4) after second mixed gas is cooled, then it is passed through in NaOH absorbing liquids after reaction, is discharged into air.Therefore, on steel band pickling line of the invention waste gas processing method and processing device, by repeatedly processing and being absorbed to NO2 gases in waste gas, improve NO2 gases absorptivity in waste gas, the discharge of NO2 gases reduced, so as to mitigate environmental pollution.
Description
Technical field
The present invention relates to technical field of waste gas treatment, processing method more particularly, to waste gas on a kind of steel band pickling line and
Device.
Background technology
On steel band pickling lines, the steel band after electrolysis enters descaling bath and carries out pickling, wherein, descaling bath is divided into two
Section：First paragraph removes the iron scale of steel strip surface using HF, and second segment mainly includes HNO3 so that the surface of steel band forms one
Layer passivating film.
During steel band enters descaling bath progress pickling progress pickling, industrial waste gas, this industrial waste gas can be produced
In just include NO2.In current production technology, after the processing method to this industrial waste gas is collection, at waste gas
Tower processing is managed, is then discharged.Generally, NaOH absorbing liquid is provided with exhaust gas treating tower, allows above-mentioned waste gas to pass through the absorption
, can be by the NO in waste gas after liquid2Absorb.
But this waste gas processing method is to NO at present2Absorptivity not enough, after exhaust gas treating tower is treated
The NO included in waste gas2Solubility it is also higher, it is impossible to meet discharge standard, discharge by force, environmental pollution can be caused.
The content of the invention
The invention aims to solve the problems of the prior art, a kind of processing of waste gas on steel band pickling line is proposed
Method and device, the processing method and processing device have to the NO in waste gas on steel band pickling line2The advantages of gas absorptivity is high, from
And mitigate environmental pollution.
The technical solution adopted by the present invention is as follows：
The processing method of waste gas, the described method comprises the following steps on a kind of steel band pickling line：
1) waste gas of collection is passed through combustion chamber, in the combustion chamber, high-temp combustion is carried out to the waste gas；
2) gas after burning is sufficiently mixed with urea, forms mixed gas；
3) by the mixed gas pass through with catalyst haptoreaction, obtain the second mixed gas；
4) after second mixed gas is cooled, then it is passed through in NaOH absorbing liquids after reaction, is discharged into air.
A kind of emission-control equipment, the emission-control equipment include combustion chamber, and the combustion chamber connects a mixing duct,
The front end of the mixing duct is provided with nozzle, and multiple gas mixers, institute are provided with the mixing duct of the nozzle rear end
The end coupled reaction device of mixing duct is stated, is provided with catalyst in the reactor, the rear end of the reactor is provided with heat exchanger, institute
State heat exchanger rear end and connect an absorption tower, the absorption tower is provided with exhaust chimney.
Further, the gas mixer is to be intersected the hole knot being spliced using some stainless steel aeroscopic plates
Structure.
Further, the mixing duct is provided with the turning part of 180 degree at middle part.
Further, the reactor includes reactor shell, is provided with the reactor enclosure body and separates the reactor
The interlayer of housing internal channel, the interlayer is interior to set the catalyst.
Further, the heat exchanger includes heat exchanger shell, and stainless steel heat-conducting plate, institute are provided with the heat exchanger shell
State heat exchanger shell and be provided with air inlet and gas outlet.
Further, NaOH absorbing liquids are provided with the absorption tower.
Further, some observation windows are additionally provided with the emission-control equipment.
The beneficial effects of the invention are as follows：
The processing method and processing device of waste gas on the steel band pickling line of the present invention, by NO in waste gas2Gas is repeatedly handled
And absorb, improve NO in waste gas2Gas absorptivity, reduce NO2The discharge of gas, so as to mitigate environmental pollution.
The preferred embodiments of the invention and its advantage, embodiment will be combined and be further described.
Brief description of the drawings
Accompanying drawing be for providing a further understanding of the present invention, and a part for constitution instruction, it is and following specific
Embodiment is used to explain the present invention together, but should not be construed as limiting the invention.In the accompanying drawings,
Fig. 1：A kind of structural representation of emission-control equipment (absorption tower is not shown) in the embodiment of the present invention two.
Each component names and its label
1st, combustion chamber；2nd, nozzle；3rd, mixing duct；4th, observation window；5th, gas mixer；6th, turning part；7th, reactor；8、
Heat exchanger；9th, air inlet；10th, gas outlet.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Embodiment one
Embodiments of the invention disclose a kind of processing method of waste gas on steel band pickling line, and methods described includes following step
Suddenly：
The first step, the waste gas of collection is passed through combustion chamber, in the combustion chamber, high-temp combustion is carried out to the waste gas.
Generally, caused waste gas includes the HNO3 gases of volatilization, the HF gases of volatilization, caused NO on steel band pickling line2Gas with
And other other or impurity, by high-temp combustion, waste gas most of gas or impurity containing N can be changed into NOx gases.
Second step, the gas after burning is sufficiently mixed with urea, forms mixed gas.As described above, the gas after burning
Gas or impurity of the body containing N all form NOx gases substantially, and NOx gases include NO2, NO etc..Due to being high-temp combustion, combustion
The temperature of gas also keeps very high after burning, and urea is also gaseous state in the state of high temperature, therefore the new mixed gas that formed is
Contain urea NO2, NO etc. high-temperature gas.
3rd step, by the mixed gas pass through with catalyst haptoreaction, obtain the second mixed gas.Wherein, catalyst is
A kind of solid catalyst, under the catalytic action for having this solid catalyst of catalyst, the urea in the mixed gas is as also
Former agent, make the NOx gases (NO in mixed gas2, NO etc.) be reduced to harmless N2(nitrogen) and H2O (water).
4th step, after second mixed gas is cooled, then it is passed through in NaOH absorbing liquids after reaction, is discharged into air
In.Perhaps, above reduction reaction, which also exists, reacts insufficient, i.e., is still likely present in the second resulting mixed gas few
NOx gases (the NO of amount2, NO etc.), moreover, second mixed gas still also maintains higher temperature.Therefore, it is formerly right
After second mixed gas is cooled, then it is passed through in NaOH absorbing liquids and reacts.Purpose to the cooling of the second mixed gas is anti-
Only NaOH absorbing liquids reclaimed water explosive evaporation.NaOH absorbing liquids can be to NOx gases (NO in the second mixed gas2, NO etc.) gas enters
Absorb to one step.
Therefore, on the above steel band pickling line waste gas processing method, to NO in waste gas2Gas repeatedly handle and inhale
Receive, improve NO in waste gas2Gas absorptivity, reduce NO2The discharge of gas, so as to mitigate environmental pollution.
Embodiment two
It refer to shown in accompanying drawing 1, a kind of emission-control equipment, the emission-control equipment is also disclosed in embodiments of the invention
Including combustion chamber 1, the combustion chamber 1 connects a mixing duct, and the front end of the mixing duct 3 is provided with nozzle 2, the nozzle 2
Multiple gas mixers 5 are provided with the mixing duct 3 of rear end, the end coupled reaction device 7 of the mixing duct 3 is described
Catalyst is provided with reactor 7, the rear end of the reactor 7 is provided with heat exchanger 8, and the rear end of heat exchanger 8 connects an absorption tower, institute
State absorption tower and be provided with exhaust chimney.
Wherein, the gas mixer 5 is to be intersected the pore space structure being spliced using some stainless steel aeroscopic plates,
The mixing duct 3 is provided with the turning part 6 of 180 degree at middle part.Turning part 6 is set to shorten the entirety length of the mixing duct 3
Degree, reduce and lay space.
The reactor 7 includes reactor shell, is provided with to separate in the reactor enclosure body in the reactor enclosure body and leads to
The interlayer in road, the interlayer is interior to set the catalyst.
The heat exchanger 8 includes heat exchanger shell, and stainless steel heat-conducting plate, the heat exchanger are provided with the heat exchanger shell
Housing is provided with air inlet 9 and gas outlet 10.It should be noted that air inlet 9 described herein is used to be passed through cooling gas, cool down
Gas is blown on heat-conducting plate, makes the temperature of the heat-conducting plate reduce.The heat exchanger 8 itself is connected with the reactor 7, is passed through
After the treated waste gas of the reactor 7 is entered in the heat exchanger 8, contact with the heat-conducting plate in heat exchanger 8, passed by heat
The principle passed, so as to reach the purpose for reducing the EGT, finally, cooling gas and the waste gas to be cooled are together
It is flow to from the gas outlet 10 in the absorption tower of next step.
NaOH absorbing liquids are provided with the absorption tower.Now, a small amount of NO is only deposited in waste gas2Gas, and utilize
NaOH absorbing liquids can be to these NO2Gas is absorbed.
Some observation windows 4 are additionally provided with the emission-control equipment.These observation windows 4 can be separately positioned at whole waste gas
Manage on any one component on device, for observing the situation of component internal work operating.
In summary, on steel band pickling line of the invention waste gas processing method and processing device, by NO in waste gas2Gas
Repeatedly processing and absorption, improve NO in waste gas2Gas absorptivity, reduce NO2The discharge of gas, so as to mitigate environmental pollution.
Without departing from the thought of the invention, the various different embodiments of the present invention are combined, all should
When being considered as present disclosure；In the range of the technology design of the present invention, a variety of simple modifications are carried out to technical scheme
And any combination of the thought without prejudice to the invention that different embodiments are carried out, all should protection scope of the present invention it
It is interior.
Claims (8)
1. the processing method of waste gas on a kind of steel band pickling line, it is characterised in that the described method comprises the following steps：
1) waste gas of collection is passed through combustion chamber, in the combustion chamber, high-temp combustion is carried out to the waste gas；
2) gas after burning is sufficiently mixed with urea, forms mixed gas；
3) by the mixed gas pass through with catalyst haptoreaction, obtain the second mixed gas；
4) after second mixed gas is cooled, then it is passed through in NaOH absorbing liquids after reaction, is discharged into air.
2. a kind of emission-control equipment, it is characterised in that the emission-control equipment includes combustion chamber, the combustion chamber connection one
Mixing duct, the front end of the mixing duct are provided with nozzle, multiple gases are provided with the mixing duct of the nozzle rear end
Blender, the end coupled reaction device of the mixing duct, the reactor is interior to be provided with catalyst, and the rear end of the reactor is provided with
Heat exchanger, the heat exchanger rear end connect an absorption tower, and the absorption tower is provided with exhaust chimney.
3. emission-control equipment according to claim 2, it is characterised in that the gas mixer is using some stainless
Steel aeroscopic plate intersects the pore space structure being spliced.
4. emission-control equipment according to claim 2, it is characterised in that the mixing duct is provided with 180 degree at middle part
Turning part.
5. emission-control equipment according to claim 2, it is characterised in that the reactor includes reactor shell, institute
The interlayer for being provided with reactor enclosure body and separating the reactor shell internal channel is stated, the catalyst is set in the interlayer.
6. emission-control equipment according to claim 2, it is characterised in that the heat exchanger includes heat exchanger shell, institute
State in heat exchanger shell and be provided with stainless steel heat-conducting plate, the heat exchanger shell is provided with air inlet and gas outlet.
7. emission-control equipment according to claim 2, it is characterised in that NaOH absorbing liquids are provided with the absorption tower.
8. emission-control equipment according to claim 2, it is characterised in that be additionally provided with the emission-control equipment some
Observation window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878354.XA CN107596884B (en) | 2017-09-26 | 2017-09-26 | Method and device for treating waste gas on steel strip pickling line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710878354.XA CN107596884B (en) | 2017-09-26 | 2017-09-26 | Method and device for treating waste gas on steel strip pickling line |
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| Publication Number | Publication Date |
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| CN107596884A true CN107596884A (en) | 2018-01-19 |
| CN107596884B CN107596884B (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710878354.XA Active CN107596884B (en) | 2017-09-26 | 2017-09-26 | Method and device for treating waste gas on steel strip pickling line |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203408631U (en) * | 2013-08-19 | 2014-01-29 | 北京方信立华科技有限公司 | Selective catalytic reduction denitration device for NOx containing waste gases |
| CN203437036U (en) * | 2013-09-12 | 2014-02-19 | 河北环科力创环境工程有限公司 | Sintering fume desulfurization and denitrification device |
| CN105457486A (en) * | 2015-11-24 | 2016-04-06 | 西安航天源动力工程有限公司 | Coke oven flue gas integrated treatment method |
-
2017
- 2017-09-26 CN CN201710878354.XA patent/CN107596884B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203408631U (en) * | 2013-08-19 | 2014-01-29 | 北京方信立华科技有限公司 | Selective catalytic reduction denitration device for NOx containing waste gases |
| CN203437036U (en) * | 2013-09-12 | 2014-02-19 | 河北环科力创环境工程有限公司 | Sintering fume desulfurization and denitrification device |
| CN105457486A (en) * | 2015-11-24 | 2016-04-06 | 西安航天源动力工程有限公司 | Coke oven flue gas integrated treatment method |
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| Publication number | Publication date |
|---|---|
| CN107596884B (en) | 2019-12-20 |
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Application publication date: 20180119 Assignee: Foshan Nanhai zhenghongtai Stainless Steel Co., Ltd Assignor: ZHAOQING HONGWANG METAL INDUSTRIAL Co.,Ltd. Contract record no.: X2020440000084 Denomination of invention: Exhaust gas treatment method and device for steel strip pickling line Granted publication date: 20191220 License type: Common License Record date: 20200618 |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.30, Industrial Avenue, hi tech Zone, Zhaoqing City, Guangdong Province Patentee after: ZHAOQING HONGWANG METAL INDUSTRIAL Co.,Ltd. Patentee after: Hongwang Holding Group Co.,Ltd. Address before: No.30, Industrial Avenue, hi tech Zone, Zhaoqing City, Guangdong Province Patentee before: ZHAOQING HONGWANG METAL INDUSTRIAL Co.,Ltd. Patentee before: HONGWANG INVESTMENT GROUP Co.,Ltd. |