CN105797549A - Single-fluid automated waste gas treatment method - Google Patents
Single-fluid automated waste gas treatment method Download PDFInfo
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- CN105797549A CN105797549A CN201610346739.7A CN201610346739A CN105797549A CN 105797549 A CN105797549 A CN 105797549A CN 201610346739 A CN201610346739 A CN 201610346739A CN 105797549 A CN105797549 A CN 105797549A
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- waste gas
- control system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/51—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/124—Liquid reactants
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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
Abstract
The invention relates to the technical field of waste gas treatment, in particular to a single-fluid automated waste gas treatment method.The treatment method comprises the following steps that 1, real-time dynamic monitoring is conducted on the concentration of target harmful substances in a coal-burning kiln by mean of an instrument, and content data of the target harmful substances is fed back to an automated control system; 2, the automated control system gives out a signal according to a result calculated by a PLC, and chemical liquid is output to a spray gun through a frequency conversion control water pump; 3, the chemical liquid is fully mixed with waste gas to be treated, the mixture reacts chemically with the harmful substances, and standard discharge is achieved.According to the single-fluid automated waste gas treatment method, the system tracks changes of the content of the target substances in the waste gas to change frequency of a power supply so as to adjust the rotating speed of a water pump motor, and therefore chemical supply dose is regulated, and energy-saving automatic spray is achieved; other auxiliary materials such as compressed air, energy and equipment do not need to be added; chemical liquid waste is avoided, the treatment cost is reduced, and meanwhile secondary pollution, caused by chemical escape, to air is effectively prevented.
Description
Technical field
The present invention relates to technical field of waste gas treatment, especially a kind of single fluid automatization waste gas processing method.
Background technology
Along with the sustainable development of China's industry, the pollutant such as nitrogen oxides the ozone caused and fine particles pollution problem become increasingly conspicuous, and the healthy of the people in serious threat, become environmental problem currently in the urgent need to address.Nitrogen oxides (NOx) is one of major pollutants of air, including NO, NO2、N2O、N2O3、N2O5Etc. multiple nitrogen oxide, the NOx of coal-fired furnace discharge is mostly NO.Due to the oxidisability of air, NOx can form nitric acid (HNO in an atmosphere3) and nitrate fine particle, same to sulphuric acid (H2SO4) and sulfate particulate is together, the deterioration of easy acceleration region acid rain.
The mainstream technology that denitration both at home and abroad adopts at present includes SCR technology (SCR) and SNCR technology (SNCR) etc., operation principle is all that atomization is injected in kiln or special Benitration reactor using the solution such as ammonia, carbamide as reducing agent.They include: jet module, metering mixing module, conveyor module, PLC control module etc..The reducing agent consumption that denitration needs is controlled by the flow control valve in system feed dispensing cabinet, and it is by the output data setting of nitrogen oxides controller；The input data of nitrogen oxides controller are from the instrumentation actual NOx value to flue gas analysis.
A certain amount of reductant solution that NOx control system requires is separated by pipeline.This amount, by electromagnetic flowmeter control, is regulated by pneumatic control valve.Required a certain amount of dilution water by effusion meter control, is regulated by pneumatic control valve before mixing with reductant solution.After mixing, all mixed liquors are divided into corresponding each the spray gun of equal portions, control to guarantee the distribution of every rifle equivalent by effusion meter；The compression air of the necessary amount that mixed liquor atomization is required is regulated by pneumatic control valve, is controlled by piezometer and effusion meter.It also needs to, by the detection to smoke components, adjust atomized liquid and compressed-air actuated flow pressure ratio, to ensure to enter the atomizing effect of the reductant solution in kiln or special Benitration reactor.
It can thus be seen that above method whole set process equipment is complicated, response lag, operation stability is poor, and fault rate is high.
Summary of the invention
The technical problem to be solved in the present invention is: overcome deficiency of the prior art, it is provided that a kind of efficiency is high, technique simple single fluid automatization waste gas processing method.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows:
The processing method of a kind of single fluid automatization waste gas, the treating method comprises following steps:
(1) adopt instrument that the concentration of the objective pests in coal-fired furnace is carried out real-time dynamic monitoring, and the content data of object is fed back to automation control system；
(2) automatic control system provides signal according to the PLC result calculated, by VFC water pump output medicinal liquid to spray pistol, the frequency of the change change power supply that system follows the tracks of object content in waste gas regulates pump motor rotating speed, thus regulating for dose, it is achieved energy-saving auto spraying；
(3) spray pistol is ejected into waste gas and flows through pipeline or equipment after the medicinal liquid with certain pressure is atomized；
(4) medicinal liquid and pending waste gas are sufficiently mixed, and obtain purpose with harmful substance generation chemical reaction thus realizing qualified discharge.
Further, one or more in ammonia, carbamide, hydrogen sulfide, acid & alkali liquid, redox flow selected by described medicinal liquid.
Further, described objective pests is as follows: toxic and harmful that is that produce in nitrogen oxides, sulfur dioxide and chemical reaction process produced by fuel combustion or that reveal.
Further, automatic control system includes switch board, and described switch board has the signaling interface of control in entrance, can carry out middle control display and control, it is possible to on-the-spot display, closed loop automatic control and Non-follow control.
Technical scheme is adopted to provide the benefit that:
The inventive method is to be followed the tracks of the change of object content in waste gas by system to change the frequency of power supply to regulate pump motor rotating speed, thus regulating for dose, it is achieved energy-saving auto spraying；Switch board has the signaling interface of control in entrance, can carry out middle control display and control, it is possible to on-the-spot display, closed loop automatic control and Non-follow control；
This method consumption need not increase other supplies, energy and the equipment such as compression air except the medicinal liquids such as the ammonia for reacting；Avoiding the waste of the medicinal liquids such as ammonia, decrease processing cost, also effectively prevent the escape of the medicinal liquids such as ammonia in order to avoid causing the secondary pollution to air simultaneously.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described.
The processing method of a kind of single fluid automatization waste gas, the treating method comprises following steps:
(1) adopt instrument that the concentration of the objective pests in coal-fired furnace is carried out real-time dynamic monitoring, and the content data of object is fed back to automation control system；
(2) automatic control system provides signal according to the PLC result calculated, by VFC water pump output medicinal liquid to spray pistol, the frequency of the change change power supply that system follows the tracks of object content in waste gas regulates pump motor rotating speed, thus regulating for dose, it is achieved energy-saving auto spraying；
(3) spray pistol is ejected into waste gas and flows through pipeline or equipment after the medicinal liquid with certain pressure is atomized；
(4) medicinal liquid and pending waste gas are sufficiently mixed, and obtain purpose with harmful substance generation chemical reaction thus realizing qualified discharge.
Its herb liquid selects one or more in ammonia, carbamide, hydrogen sulfide, acid & alkali liquid, redox flow.
In the present invention, objective pests is as follows: toxic and harmful that is that produce in nitrogen oxides, sulfur dioxide and chemical reaction process produced by fuel combustion or that reveal
The inventive method is to be followed the tracks of the change of object content in waste gas by system to change the frequency of power supply to regulate pump motor rotating speed, thus regulating for dose, it is achieved energy-saving auto spraying.Switch board has the signaling interface of control in entrance, can carry out middle control display and control, it is possible to on-the-spot display, closed loop automatic control and Non-follow control.
Switch board can the existing concentration of numerical monitor NOx, setting the significant data such as aimed concn and pump motor rotating speed, frequency, electric current, power, pressure, and can to middle control offer 4～20mA pump rotary speed signal, be ready for signal, water pump operation signal, fault-signal, starting of pump station stop control signal, pump outlet pressure signal, it is extremely convenient to use.After using the said equipment, without electromagnetic valve and electrodynamic valve, system is followed the tracks of the frequency of smoke NOx content change change converter and is regulated pump motor rotating speed, thus regulating reducing agent consumption, it is achieved energy-saving auto spraying denitration.System can be automatically adjusted spray amount after running, and makes flue gas concentration value draw close to aimed concn, and aimed concn is got over top adjustment and obtained hurry up, regulates more slow closer to aimed concn, finally makes NOx concentration be stable at the desired value of setting.
This method consumption need not increase other supplies, energy and the equipment such as compression air except the medicinal liquids such as the ammonia for reacting.Avoiding the waste of ammonia, decrease processing cost, also effectively prevent the escape of ammonia in order to avoid causing the secondary pollution to air simultaneously.
It is also an advantage of the present invention that its very effective reducing agent consumption that solves in denitrification process can not carry out changing in real time along with NOx content and easily produce the problem that consumption is too much or not enough.Reducing agent consumption is too much, it is easy to cause the escape of ammonia not only to waste cost but also air is formed secondary pollution；Reducing agent consumption is not enough, then NOx concentration can drop, and can not meet the requirement of qualified discharge.The present invention solves this difficult problem well, by the mensuration analysis to nitrogen oxides of exhaust gas content, data feedback to control system；Control system changes motor speed result corresponding after calculating by converter and realizes the Automated condtrol to reducing agent consumption.Reductant solution can with any than dilution under normal circumstances, and it will not be carried out requirement and control by whole system run duration.The input data of whole system only have the concentration parameter of nitrogen oxides, and exporting data is also only only have power frequency, and controll plant only one of which especially drives the operated motor of booster water pump.The method is sensitive, simple and reliable with device reaction, it is possible to meets different occasion and carries out the requirement of exhaust emission improvement.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not necessarily departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content in description, it is necessary to determine its technical scope according to right.
Claims (4)
1. the processing method of a single fluid automatization waste gas, it is characterised in that the treating method comprises following steps:
(1) adopt instrument that the concentration of the objective pests in coal-fired furnace is carried out real-time dynamic monitoring, and the content data of object is fed back to automation control system；
(2) automatic control system provides signal according to the PLC result calculated, by VFC water pump output medicinal liquid to spray pistol, the frequency of the change change power supply that system follows the tracks of object content in waste gas regulates pump motor rotating speed, thus regulating for dose, it is achieved energy-saving auto spraying；
(3) spray pistol is ejected into waste gas and flows through pipeline or equipment after the medicinal liquid with certain pressure is atomized；
(4) medicinal liquid and pending waste gas are sufficiently mixed, and obtain purpose with harmful substance generation chemical reaction thus realizing qualified discharge.
2. the processing method of a kind of single fluid automatization according to claim 1 waste gas, it is characterised in that: one or more in ammonia, carbamide, hydrogen sulfide, acid & alkali liquid, redox flow selected by described medicinal liquid.
3. the processing method of a kind of single fluid automatization according to claim 1 waste gas, it is characterized in that, described objective pests is as follows: toxic and harmful that is that produce in nitrogen oxides, sulfur dioxide and chemical reaction process produced by fuel combustion or that reveal.
4. the processing method of a kind of single fluid automatization according to claim 1 waste gas, it is characterized in that: automatic control system includes switch board, described switch board has the signaling interface of control in entrance, can carry out middle control display and control, it is possible to on-the-spot display, closed loop automatic control and Non-follow control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610346739.7A CN105797549A (en) | 2016-05-24 | 2016-05-24 | Single-fluid automated waste gas treatment method |
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| CN201610346739.7A CN105797549A (en) | 2016-05-24 | 2016-05-24 | Single-fluid automated waste gas treatment method |
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| CN105797549A true CN105797549A (en) | 2016-07-27 |
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| CN201610346739.7A Pending CN105797549A (en) | 2016-05-24 | 2016-05-24 | Single-fluid automated waste gas treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108671735A (en) * | 2018-06-08 | 2018-10-19 | 项硕 | A kind of calcinated argil preparation process exhaust gas processing device |
| CN109395559A (en) * | 2018-11-09 | 2019-03-01 | 西安科技大学 | A kind of device and method of use for laboratory physical analogy tunnel removing hydrogen sulfide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5217508A (en) * | 1991-12-19 | 1993-06-08 | Jonsson Kjarten A | Waste gas treatment method and system |
| CN101327403A (en) * | 2008-07-27 | 2008-12-24 | 郴州市金贵银业股份有限公司 | Device for purifying and treating tail gas |
| CN203648379U (en) * | 2013-12-20 | 2014-06-18 | 湖南中冶长天节能环保技术有限公司 | Automatic urea-adding device for selective non-catalytic reduction flue gas denitrification |
| CN205145959U (en) * | 2015-10-21 | 2016-04-13 | 济南冶金化工设备有限公司 | Coking flue gas and processing economic benefits and social benefits clean system that unifies including ammonia wastewater |
-
2016
- 2016-05-24 CN CN201610346739.7A patent/CN105797549A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5217508A (en) * | 1991-12-19 | 1993-06-08 | Jonsson Kjarten A | Waste gas treatment method and system |
| CN101327403A (en) * | 2008-07-27 | 2008-12-24 | 郴州市金贵银业股份有限公司 | Device for purifying and treating tail gas |
| CN203648379U (en) * | 2013-12-20 | 2014-06-18 | 湖南中冶长天节能环保技术有限公司 | Automatic urea-adding device for selective non-catalytic reduction flue gas denitrification |
| CN205145959U (en) * | 2015-10-21 | 2016-04-13 | 济南冶金化工设备有限公司 | Coking flue gas and processing economic benefits and social benefits clean system that unifies including ammonia wastewater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108671735A (en) * | 2018-06-08 | 2018-10-19 | 项硕 | A kind of calcinated argil preparation process exhaust gas processing device |
| CN109395559A (en) * | 2018-11-09 | 2019-03-01 | 西安科技大学 | A kind of device and method of use for laboratory physical analogy tunnel removing hydrogen sulfide |
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Application publication date: 20160727 |
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