CN104888589A - Comprehensive treatment system for oxynitride exhaust gas - Google Patents
Comprehensive treatment system for oxynitride exhaust gas Download PDFInfo
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- CN104888589A CN104888589A CN201510117667.4A CN201510117667A CN104888589A CN 104888589 A CN104888589 A CN 104888589A CN 201510117667 A CN201510117667 A CN 201510117667A CN 104888589 A CN104888589 A CN 104888589A
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Abstract
The invention relates to a comprehensive treatment system for oxynitride exhaust gas, in particular to an environmental-friendly and energy-saving comprehensive oxynitride treatment system. The comprehensive oxynitride treatment system mainly overcomes the shortcomings that the efficiency is low, treated oxynitride is unlikely to be discharged by standard, and the operation cost is high in an existing oxynitride treatment system, and the first-level emission standards in the national integrated emission standards of atmospheric pollutants are met. The comprehensive treatment system for the oxynitride exhaust gas comprises a rinsing tank, wherein the rinsing tank is connected to a heat reactor through an exhaust gas pipeline; the heat reactor is designed to be in one-stage or multi-stage series connection; an air inlet is formed in a pipeline of the heat reactor; an air outlet of the heat reactor is connected to a nitric acid recycling tower through a pipeline; the nitric acid recycling tower adopts one-stage or multi-stage series connection, is provided with a nitric acid recycling pipeline for recycling absorbed nitric acid and is connected to a high-efficiency reducing tower through the exhaust gas pipeline; absorbing liquid in the high-efficiency reducing tower is a reducing agent, and oxynitride is reduced into N2, so that secondary pollution is prevented.
Description
Technical field
The present invention relates to exhaust treatment system, especially relate to a kind of oxynitrides comprehensive treatment system.
Background technology
In chemical industry, nitric plant, oxalic acid factory, ammonium nitrate factory, containing a large amount of oxynitrides waste gas in the process tail gas that some enterprises producing and apply nitric acid such as explosive factory discharge, the discharge of these oxynitrides, not only cause the waste of resource, and to the mankind and ecological environment, there is great harm, the project of waste gas administration of China is started late, by introducing and researching and developing, waste gas pollution control and treatment technical development is very fast, the granting of removing oxynitrides waste gas has some to obtain exploitation, among some are being studied in addition, to study at present and comparatively ripe and have the method for some superiority to be combustion method, absorption method, SCR (SCR), the methods such as SNCR (SNCR) and absorption process.But its system effectiveness is low, process is difficult to qualified discharge, operating cost is high, have much room for improvement.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of environmental protection, energy-saving oxynitrides comprehensive treatment system are provided.Oxynitrides waste gas is introduced into water washing tank by the present invention, remove in waste gas and enter heating power reactor after dust, heating power reactor passes through heat exchange, reduce the temperature of oxynitrides waste gas, the waste gas after heat exchange enters nitric acid recovery tower, adopts dust technology to absorb oxynitrides waste gas in nitric acid recovery tower, form the nitric acid that concentration is higher, oxynitrides waste gas enters and efficiently reduces tower after dust technology absorbs, and in efficient reduction tower, oxynitrides is converted into N by reducing agent
2, then enter aiutage by blower fan and carry out qualified discharge.
For realizing the object of the invention, provide following technical scheme: a kind of oxynitrides waste gas comprehensive treatment system, it is characterized in that comprising the water washing tank connected in turn, heating power reactor, nitric acid recovery tower, efficient reduction tower and aiutage, waste gas inlet pipe connects water washing tank, water washing tank upper end outlet connects heating power reactor bottom air inlet by exhaust piping, gas outlet, heating power reactor upper end connects nitric acid recovery tower bottom air inlet by exhaust piping, gas outlet, nitric acid recovery tower upper end connects efficient reduction tower bottom air inlet by exhaust piping, efficient reduction tower top brings out gas port by exhaust piping connecting fan, blower fan connects aiutage.Blower fan forms negative pressure in system after being placed on efficient reduction tower, and under condition of negative pressure, the fresh air energy automatic log-on of oxidation NO, without the need to increasing other tonifying Qi equipment.
As preferably, before heating power reactor, nitric acid recovery tower, efficient reduction tower, exhaust piping arranges air intake pipe, and the NO in system is oxidized to NO
2.
As preferably, heating power reactor bottom condensation-water drain pipeline connects condensation water collection tank, and condensation water collection tank arranges dust technology recovery channel and connects dust technology storage tank, and dust technology recovery channel is provided with elevator pump.
As preferably, nitric acid recovery tower bottom arranges nitric recycle pipeline and connects nitric acid recovery tower upper end spray equipment, and described nitric recycle pipeline is disposed with condenser, circulating pump.Reducing the temperature of circulation fluid by arranging condenser, improving the absorption efficiency of oxynitrides.
As preferably, efficient reduction tower bottom is provided with absorbing liquid circulating line, and absorbing liquid circulating line connects efficient reduction tower top end spray equipment, and absorbing liquid circulating line is provided with circulating pump, is separately provided with chemicals dosing plant and connects absorbing liquid circulating line by drug feeding pipeline.Medicament may be selected to be urea, generates N after oxynitrides and urea reaction
2, H
2o, CO
2, non-secondary pollution thing generates.
As preferably, nitric recycle pipeline is separately provided with pipeline and connects dust technology recovery channel, and pipeline is provided with valve.
As preferably, water washing tank, nitric acid recovery tower and efficient reduction tower are provided with running water inlet channel.
As preferably, heating power reactor is provided with cooling water inlet pipe road, and top is provided with cooling water outlet pipe road.
As preferably, heating power reactor, nitric acid recovery tower are set to one or more levels.Oxynitrides waste gas maximum is converted into nitric acid, reclaims nitric acid in a large number, reduce the consumption of sequential reduction agent simultaneously.
As preferably, be that absorbing liquid circulating line or nitric recycle install pipeline have Pressure gauge.
The present invention carries out closed processes to the oxynitrides waste gas source that produces, and the source place of preventing introduces too many air, reduces designing apparatus scale.
In water washing tank of the present invention, water level can come automatically or manual adjustments according to the pressure of oxynitrides waste gas.
Arrange water separator, spray system, filler, filler support in nitric acid recovery tower, efficient reduction tower, gas-liquid contact is abundant.
Beneficial effect of the present invention: the present invention can realize the comprehensive regulation of oxynitrides waste gas, and toxic emission reaches national grade one discharge standard, system non-secondary pollution produce are raw, can reclaim a large amount of dust technology simultaneously, produce economic benefit.
Accompanying drawing explanation
Fig. 1 is present system schematic diagram.
Detailed description of the invention
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is further described.
Embodiment 1: a kind of oxynitrides waste gas comprehensive treatment system, comprise the water washing tank 1 connected in turn, heating power reactor 2, nitric acid recovery tower 3, efficient reduction tower 4 and aiutage 5, waste gas inlet pipe 6 connects water washing tank 1, water washing tank 1 upper end outlet connects heating power reactor 2 bottom air inlet by exhaust piping 7, gas outlet, heating power reactor 2 upper end connects nitric acid recovery tower 3 bottom air inlet by exhaust piping 7, gas outlet, nitric acid recovery tower 3 upper end connects efficient reduction tower 4 bottom air inlet by exhaust piping 7, gas outlet, efficient reduction tower 4 top is by exhaust piping 7 connecting fan 8, blower fan 8 connects aiutage 5.Before heating power reactor 2, nitric acid recovery tower 3, efficient reduction tower 4, exhaust piping 7 arranges air intake pipe 9.Heating power reactor 2 bottom condensation-water drain pipeline 10 connects condensation water collection tank 11, and condensation water collection tank 11 arranges dust technology recovery channel 12 and connects dust technology storage tank 13, dust technology recovery channel 12 is provided with elevator pump 14.Nitric acid recovery tower 3 bottom arranges nitric recycle pipeline 15 and connects nitric acid recovery tower 3 upper end spray equipment, and described nitric recycle pipeline 15 is disposed with condenser 16, circulating pump 17.Efficient reduction tower 4 bottom is provided with absorbing liquid circulating line 18, absorbing liquid circulating line 18 connects efficient reduction tower 4 top spray equipment, absorbing liquid circulating line 18 is provided with circulating pump 17, is separately provided with chemicals dosing plant 20 and connects absorbing liquid circulating line 18 by drug feeding pipeline 21.Nitric recycle pipeline 15 is separately provided with pipeline and connects dust technology recovery channel 12, and pipeline is provided with valve.Water washing tank 1, nitric acid recovery tower 3 and efficient reduction tower 4 are provided with running water inlet channel 22.Heating power reactor 2 is provided with cooling water inlet pipe road 23, and top is provided with cooling water outlet pipe road 24.Absorbing liquid circulating line 18 or nitric recycle pipeline 15 are provided with Pressure gauge.
Produce the oxynitrides produced and enter water washing tank 1, running water or river is added by running water inlet channel 22 in water washing tank 1, by washing, remove dust etc. contained in waste gas, water washing tank bucket 1 exhaust piping is connected to heating power reactor 2, while waste gas enters heating power reactor 2 again, supplement part fresh air by air intake pipe 9, make the NO in oxynitrides be oxidized to NO
2heat exchange is passed through in heating power reactor 2, reduce EGT, heating power reactor 2 is connected to nitric acid recovery tower 3 by exhaust piping 7, establishes spray equipment in nitric acid recovery tower 3, absorbing liquid enters nitric acid recovery tower 3 by condenser 16, circulating pump 17, nitric recycle pipeline 15, after being atomized by spray equipment, from top to bottom, through filler, filler support, contact with the oxynitrides waste gas entering nitric acid recovery tower 3 is reverse, absorb NO and NO in waste gas
2make concentration of nitric acid in absorbing liquid raise simultaneously, nitric acid recovery tower 3 is connected to efficient reduction tower 4 by exhaust piping 7, establish spray equipment in efficient reduction tower 4, absorbing liquid enters efficient reduction tower 4, after being atomized by spray equipment by circulating pump 17, absorbing liquid circulating line 18, from top to bottom, through filler, filler support, efficiently reduce that the oxynitrides waste gas of tower 4 is reverse to be contacted with entering, absorb NO and NO remained in waste gas
2, efficient reduction tower 4 is given vent to anger and is entered blower fan 8 by exhaust piping 7, then enters aiutage 5 and carries out qualified discharge.
During use, if oxynitrides EGT is very high, by can condensed water be produced after heating power reactor 2, condensed water is disposed to condensation water collection tank 11 by condensation-water drain pipeline 10, condensed water condensation process absorption portion oxynitrides, has larger acidity, can be used as dust technology and uses.
During use, nitric acid recovery tower 3 adopts running water to absorb oxynitrides, and when in nitric acid recovery tower 3, dust technology concentration reaches about 20%, in nitric acid recovery tower 3, nitric acid is promoted to dust technology storage tank 13 by circulating pump 17.
During use, efficient reduction tower 4 adopts urea to absorb oxynitrides, after reacting, forms CO with oxynitrides
2, H
2o and N
2, non-secondary pollution.
The foregoing is only specific embodiments of the invention, but architectural feature of the present invention is not limited thereto, any those skilled in the art is in the field of invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (10)
1. an oxynitrides waste gas comprehensive treatment system, it is characterized in that comprising the water washing tank connected in turn, heating power reactor, nitric acid recovery tower, efficient reduction tower and aiutage, waste gas inlet pipe connects water washing tank, water washing tank upper end outlet connects heating power reactor bottom air inlet by exhaust piping, gas outlet, heating power reactor upper end connects nitric acid recovery tower bottom air inlet by exhaust piping, gas outlet, nitric acid recovery tower upper end connects efficient reduction tower bottom air inlet by exhaust piping, efficient reduction tower top brings out gas port by exhaust piping connecting fan, blower fan connects aiutage.
2. a kind of oxynitrides waste gas comprehensive treatment system according to claim 1, before it is characterized in that heating power reactor, nitric acid recovery tower, efficient reduction tower, exhaust piping arranges air intake pipe.
3. a kind of oxynitrides waste gas comprehensive treatment system according to claim 1, it is characterized in that heating power reactor bottom condensation-water drain pipeline connects condensation water collection tank, condensation water collection tank arranges dust technology recovery channel and connects dust technology storage tank, and dust technology recovery channel is provided with elevator pump.
4. a kind of oxynitrides waste gas comprehensive treatment system according to claim 1, it is characterized in that nitric acid recovery tower bottom arranges nitric recycle pipeline and connects nitric acid recovery tower upper end spray equipment, described nitric recycle pipeline is disposed with condenser, circulating pump.
5. a kind of oxynitrides waste gas comprehensive treatment system according to claim 1, it is characterized in that efficiently reducing tower bottom is provided with absorbing liquid circulating line, absorbing liquid circulating line connects efficient reduction tower top end spray equipment, absorbing liquid circulating line is provided with circulating pump, is separately provided with chemicals dosing plant and connects absorbing liquid circulating line by drug feeding pipeline.
6. a kind of oxynitrides waste gas comprehensive treatment system according to claim 4, is characterized in that nitric recycle pipeline is separately provided with pipeline and connects dust technology recovery channel, pipeline is provided with valve.
7. a kind of oxynitrides waste gas comprehensive treatment system according to claim 1, is characterized in that water washing tank, nitric acid recovery tower and efficient reduction tower are provided with running water inlet channel.
8. a kind of oxynitrides waste gas comprehensive treatment system according to claim 1, it is characterized in that heating power reactor is provided with cooling water inlet pipe road, top is provided with cooling water outlet pipe road.
9. a kind of oxynitrides waste gas comprehensive treatment system according to claim 1, is characterized in that heating power reactor, nitric acid recovery tower is set to one or more levels.
10. a kind of oxynitrides waste gas comprehensive treatment system according to claim 4 or 5, is characterized in that absorbing liquid circulating line or nitric recycle install pipeline have Pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510117667.4A CN104888589A (en) | 2015-03-18 | 2015-03-18 | Comprehensive treatment system for oxynitride exhaust gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510117667.4A CN104888589A (en) | 2015-03-18 | 2015-03-18 | Comprehensive treatment system for oxynitride exhaust gas |
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|---|---|---|---|
| CN201510117667.4A Pending CN104888589A (en) | 2015-03-18 | 2015-03-18 | Comprehensive treatment system for oxynitride exhaust gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582184A (en) * | 2017-02-09 | 2017-04-26 | 江苏永益环保科技有限公司 | Welding soot purifier |
| CN107722296A (en) * | 2017-11-27 | 2018-02-23 | 吴雨函 | A kind of nitro humic acid environmental protection volume production equipment |
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| CN102188891A (en) * | 2011-05-06 | 2011-09-21 | 北京化工大学 | Purification process for acid oxidation and alkaline reduction of waste gas containing nitrogen oxide |
| CN102247748A (en) * | 2011-06-30 | 2011-11-23 | 湖北省宏源药业有限公司 | Treatment method and treatment system of tail gas from glyoxylic acid production by nitric acid oxidation of glyoxal |
| CN102343201A (en) * | 2011-10-11 | 2012-02-08 | 南京大学 | Process for removing acid gas from flue gas by using residual heat of flue gas |
| US20130296615A1 (en) * | 2012-05-03 | 2013-11-07 | Eco Power Solutions (Usa) Corp. | Multi-pollutant abatement device and method |
| CN103801176A (en) * | 2014-01-27 | 2014-05-21 | 浙江大学 | Flue gas denitration technology and flue gas denitration device implemented by combining ozonation and spraying cooling |
| CN204637940U (en) * | 2015-03-18 | 2015-09-16 | 江苏蓝晨环保科技有限公司 | A kind of oxynitrides waste gas comprehensive treatment system |
-
2015
- 2015-03-18 CN CN201510117667.4A patent/CN104888589A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188891A (en) * | 2011-05-06 | 2011-09-21 | 北京化工大学 | Purification process for acid oxidation and alkaline reduction of waste gas containing nitrogen oxide |
| CN102247748A (en) * | 2011-06-30 | 2011-11-23 | 湖北省宏源药业有限公司 | Treatment method and treatment system of tail gas from glyoxylic acid production by nitric acid oxidation of glyoxal |
| CN102343201A (en) * | 2011-10-11 | 2012-02-08 | 南京大学 | Process for removing acid gas from flue gas by using residual heat of flue gas |
| US20130296615A1 (en) * | 2012-05-03 | 2013-11-07 | Eco Power Solutions (Usa) Corp. | Multi-pollutant abatement device and method |
| CN103801176A (en) * | 2014-01-27 | 2014-05-21 | 浙江大学 | Flue gas denitration technology and flue gas denitration device implemented by combining ozonation and spraying cooling |
| CN204637940U (en) * | 2015-03-18 | 2015-09-16 | 江苏蓝晨环保科技有限公司 | A kind of oxynitrides waste gas comprehensive treatment system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582184A (en) * | 2017-02-09 | 2017-04-26 | 江苏永益环保科技有限公司 | Welding soot purifier |
| CN107722296A (en) * | 2017-11-27 | 2018-02-23 | 吴雨函 | A kind of nitro humic acid environmental protection volume production equipment |
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