CN104460367A - Safety protection control method for degrading organic waste gas through low-temperature plasma - Google Patents
Safety protection control method for degrading organic waste gas through low-temperature plasma Download PDFInfo
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- CN104460367A CN104460367A CN201410614518.4A CN201410614518A CN104460367A CN 104460367 A CN104460367 A CN 104460367A CN 201410614518 A CN201410614518 A CN 201410614518A CN 104460367 A CN104460367 A CN 104460367A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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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
- B01D53/32—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 by electrical effects other than those provided for in group B01D61/00
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Abstract
The invention relates to a safety protection control method for degrading organic waste gas through low-temperature plasma. The method mainly solves the problem that the safety coefficient is low in the prior art. According to the safety protection control method for degrading the organic waste gas through the low-temperature plasma, an online total hydrocarbon analyzer is arranged on an organic waste gas inlet pipeline of the low-temperature plasma and used for monitoring the concentration of the organic waste gas in an inlet of plasma equipment in real time, monitored data are sent to a control system, a safety concentration upper limit and concentration safety time are set through a touch screen module and transmitted to the control system, the control system compares the real-time monitored data of the concentration of the organic waste gas with the safety concentration upper limit, and when duration in which the concentration of the organic waste gas in the inlet is higher than the safety concentration upper limit exceeds the safety time, the control system transmits signals to make the low-temperature plasma equipment stop working. By the adoption of the technical scheme, the problems are well solved, and the method can be used for safety protection control for degrading the organic waste gas through the low-temperature plasma.
Description
Technical field
The present invention relates to a kind of safety protection control method of low-temperature plasma degradation organic waste gas.
Background technology
Volatile organic contaminant (VOCs) is important atmosphere pollution, the problems such as photo-chemical smog can be caused in an atmosphere, most VOCs has toxicity, pungency, certain infringement is had to health and ecologic environment, developing economy, efficient, stable VOCs degradation technique, is current field of environmental improvement focus.
The effective VOCs degradation technique of the one that during lower temperature plasma technology, development in recent years goes out, the high energy electron that plasma discharge processes produces, living radical (O, OH, O
3deng) can effectively react with contaminant molecule, contaminant molecule decomposes within the extreme time, forms short chain accessory substance or free of contamination water and CO
2, especially for the odorant pollutant that strand is shorter, as mercaptan, thioether etc. have good effect.Lower temperature plasma technology has the feature of the simple and low energy consumption of Operation and Maintenance, and promotion and application have a extensive future.
CN201210199136.0 relates to a kind of industrial organic exhaust gas low temperature plasma integrated purification device and method, device is composed in series successively by low-temperature plasma body unit and molecular sieve adsorption/catalyst unit, and comprises corresponding connecting tube, valve, induced draft fan and circulating fan.Its disposal route is that organic exhaust gas is under the effect of induced draft fan, successively through plasma unit oxidation and molecular sieve adsorption/catalyst unit adsorption treatment, after molecular sieve adsorption in molecular sieve adsorption/catalyst unit/catalysis bin absorption is saturated, this bin door is closed, and organic exhaust gas enters in another one molecular sieve adsorption/catalysis bin and discharges after adsorption cleaning.Adsorb saturated after molecular sieve catalytic unit form indirect regeneration by valve transfer and external pipeline, plasma, circulating fan, realize molecular sieve in-situ regeneration within a short period of time.
The feature of lower temperature plasma technology self is under the effect of high electric field, form electronics and the ion with higher-energy, this just causes lower temperature plasma technology when degraded VOCs, certain potential safety hazard can be had, when VOCs excessive concentration, course of reaction can be comparatively violent, form burning or even blast, this becomes the potential safety hazard that restriction lower temperature plasma technology uses.
The present invention solves this problem targetedly.
Summary of the invention
Technical matters to be solved by this invention is the problem that in prior art, safety coefficient is lower, provides a kind of safety protection control method of new low-temperature plasma degradation organic waste gas.The method has the higher advantage of safety coefficient.
For solving the problem, the technical solution used in the present invention is as follows: a kind of safety protection control method of low-temperature plasma degradation organic waste gas, organic exhaust gas is discharged through centrifugal blower after entering low-temperature plasma degradation, the organic exhaust gas source line of low temperature plasma is provided with online total hydrocarbon analyser, online total hydrocarbon analyser plasma equipment entrance organic exhaust gas concentration carries out Real-Time Monitoring, Monitoring Data sends to control system by wire signal transmitting device, the safe concentration upper limit and concentration safety time are set by touch screen module and are transferred to control system, described control system is by comparing organic exhaust gas density real-time monitoring data and the safe concentration upper limit, when entrance organic exhaust gas concentration exceedes safety time higher than duration of the safe concentration upper limit, control system sends signal makes low temperature plasma equipment quit work.
In technique scheme, preferably, the detecting device that described online total hydrocarbon analyser adopts is PID formula, detects the response time to be less than 0.5s, and detecting gas temperature can continous-stable work below 50 DEG C; Total hydrocarbon analyser is air suction type, carry out continuous real time sample, and total hydrocarbon analyser is furnished with pretreatment unit to low temperature plasma porch organic exhaust gas, can particle in Filter Examination gas and moisture, realizes the current stabilization to sample gas simultaneously.
In technique scheme, preferably, described touch screen module can arrange the safe concentration upper limit and safety time, simultaneously, when organic exhaust gas excessive concentration and the time, upper maintenance exceeded safety time time, control system sends automatically closes down signal to touch screen module, and on touch-screen, display density is too high, and equipment is closed down automatically.
In technique scheme, preferably, signal transmssion line is had between described control system and touch screen module, online total hydrocarbon analyser.
In technique scheme, preferably, organic waste source of the gas comprises wastewater treatment field rotten exhaust organic gas or process unit tail gas, and the safe concentration upper limit is 1000mg/m
3.
The invention provides a kind of safety protection control method of low-temperature plasma degradation organic waste gas, equipment comprise control plasma discharge devices and close down control system, there is the touch screen module that arranges function and the online total hydrocarbon analyser with digital data transmission function.Online total hydrocarbon analyser is by carrying out Real-Time Monitoring to entrance total hydrocarbon concentration, and concentration data is fed back to control system, the safe concentration upper limit and safety time are set by touch-screen simultaneously, when plasma apparatus is started working, control system is monitored inlet exhaust concentration and is judged, when inlet exhaust concentration exceedes safety time higher than duration of safe concentration, control system automatically sends and closes down signal, and plasma apparatus quits work.The present invention is suitable for, in low temperature plasma equipment degradation organic waste gas process, protecting, have good security protection effect in inlet exhaust during combustible component excessive concentration to discharge equipment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the method for the invention.
In Fig. 1,1 is control system; 2 is online total hydrocarbon analyser; 3 is touch screen module; 4 is plasma apparatus; 5 is centrifugal blower; 6 is organic exhaust gas source line.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Embodiment
[embodiment 1]
As shown in Figure 1, organic exhaust gas enters after low temperature plasma equipment 4 is degraded and discharges through centrifugal blower 5, the organic exhaust gas source line 6 of low temperature plasma 4 is provided with online total hydrocarbon analyser 2, online total hydrocarbon analyser 2 plasma equipment 4 entrance organic exhaust gas concentration carries out Real-Time Monitoring, Monitoring Data sends to control system 1 by wire signal transmitting device, the safe concentration upper limit and concentration safety time are set by touch screen module 3 and are transferred to control system 1, described control system 1 is by comparing organic exhaust gas density real-time monitoring data and the safe concentration upper limit, when entrance organic exhaust gas concentration exceedes safety time higher than duration of the safe concentration upper limit, control system 1 sends signal makes low temperature plasma equipment 4 quit work.
The detecting device that online total hydrocarbon analyser adopts is PID formula, detects the response time to be less than 0.5s, and detecting gas temperature can continous-stable work below 50 DEG C; Total hydrocarbon analyser is air suction type, carry out continuous real time sample, and total hydrocarbon analyser is furnished with pretreatment unit to low temperature plasma porch organic exhaust gas, can particle in Filter Examination gas and moisture, realizes the current stabilization to sample gas simultaneously.
Touch screen module can arrange the safe concentration upper limit and safety time, meanwhile, when organic exhaust gas excessive concentration and the time, upper maintenance exceeded safety time time, control system sends automatically closes down signal to touch screen module, on touch-screen, display density is too high, and equipment is closed down automatically.Thus avoid the burning or even the blast that cause organic exhaust gas, effectively protect plasma apparatus.
Claims (5)
1. the safety protection control method of a low-temperature plasma degradation organic waste gas, organic exhaust gas is discharged through centrifugal blower after entering low-temperature plasma degradation, the organic exhaust gas source line of low temperature plasma is provided with online total hydrocarbon analyser, online total hydrocarbon analyser plasma equipment entrance organic exhaust gas concentration carries out Real-Time Monitoring, Monitoring Data sends to control system by wire signal transmitting device, the safe concentration upper limit and concentration safety time are set by touch screen module and are transferred to control system, described control system is by comparing organic exhaust gas density real-time monitoring data and the safe concentration upper limit, when entrance organic exhaust gas concentration exceedes safety time higher than duration of the safe concentration upper limit, control system sends signal makes low temperature plasma equipment quit work.
2. the safety protection control method of low-temperature plasma degradation organic waste gas according to claim 1, it is characterized in that the detecting device that described online total hydrocarbon analyser adopts is PID formula, detecting the response time is less than 0.5s, and detecting gas temperature can continous-stable work below 50 DEG C; Total hydrocarbon analyser is air suction type, carry out continuous real time sample, and total hydrocarbon analyser is furnished with pretreatment unit to low temperature plasma porch organic exhaust gas, can particle in Filter Examination gas and moisture, realizes the current stabilization to sample gas simultaneously.
3. the safety protection control method of low-temperature plasma degradation organic waste gas according to claim 1, it is characterized in that described touch screen module can arrange the safe concentration upper limit and safety time, simultaneously, when organic exhaust gas excessive concentration and the time, upper maintenance exceeded safety time time, control system sends automatically closes down signal to touch screen module, on touch-screen, display density is too high, and equipment is closed down automatically.
4. the safety protection control method of low-temperature plasma degradation organic waste gas according to claim 1, is characterized in that there is signal transmssion line between described control system and touch screen module, online total hydrocarbon analyser.
5. the safety protection control method of low-temperature plasma degradation organic waste gas according to claim 1, it is characterized in that organic waste source of the gas comprises wastewater treatment field rotten exhaust organic gas or process unit tail gas, the safe concentration upper limit is 1000mg/m
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410614518.4A CN104460367A (en) | 2014-11-04 | 2014-11-04 | Safety protection control method for degrading organic waste gas through low-temperature plasma |
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| CN201410614518.4A CN104460367A (en) | 2014-11-04 | 2014-11-04 | Safety protection control method for degrading organic waste gas through low-temperature plasma |
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| CN104460367A true CN104460367A (en) | 2015-03-25 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108926974A (en) * | 2017-05-24 | 2018-12-04 | 中国石油化工股份有限公司 | A kind of security protection technique for VOCs Treatment process |
| CN108970346A (en) * | 2017-06-02 | 2018-12-11 | 中国石油化工股份有限公司 | A kind of safety protection control method of low-temperature plasma degradation organic waste gas |
| CN109308042A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | Low Temperature Plasma Treating sewage collecting, storage, processing links release gas in VOCs safety control |
| CN109308082A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | Low Temperature Plasma Treating sewage collecting, storage, processing links release gas in VOCs method of controlling security |
| CN111744341A (en) * | 2020-07-09 | 2020-10-09 | 四川轻化工大学 | Explosion-proof monitoring control method and system for low-temperature plasma organic waste gas treatment |
| CN112076595A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Control device and method for plasma generator and plasma generating device |
| CN115121097A (en) * | 2022-08-29 | 2022-09-30 | 江苏美克美斯自动化科技有限责任公司 | Low-temperature plasma waste gas treatment and purification control method and control system |
-
2014
- 2014-11-04 CN CN201410614518.4A patent/CN104460367A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 王强、周刚、钟琪: "固定源废气VOCs排放在线监测技术现状与需求研究", 《环境科学》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108926974A (en) * | 2017-05-24 | 2018-12-04 | 中国石油化工股份有限公司 | A kind of security protection technique for VOCs Treatment process |
| CN108970346A (en) * | 2017-06-02 | 2018-12-11 | 中国石油化工股份有限公司 | A kind of safety protection control method of low-temperature plasma degradation organic waste gas |
| CN108970346B (en) * | 2017-06-02 | 2021-04-30 | 中国石油化工股份有限公司 | Safety protection control method for degrading organic waste gas by low-temperature plasma |
| CN109308042A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | Low Temperature Plasma Treating sewage collecting, storage, processing links release gas in VOCs safety control |
| CN109308082A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | Low Temperature Plasma Treating sewage collecting, storage, processing links release gas in VOCs method of controlling security |
| CN109308042B (en) * | 2017-11-16 | 2021-04-13 | 中国石油化工股份有限公司 | Safety control device for VOCs in released gas in low-temperature plasma treatment sewage collection, storage and treatment links |
| CN109308082B (en) * | 2017-11-16 | 2021-11-19 | 中国石油化工股份有限公司 | Safety control method for VOCs in released gas in low-temperature plasma treatment sewage collection, storage and treatment links |
| CN112076595A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Control device and method for plasma generator and plasma generating device |
| CN112076595B (en) * | 2019-06-12 | 2023-07-28 | 中国石油化工股份有限公司 | Control device and method for plasma generator and plasma generator |
| CN111744341A (en) * | 2020-07-09 | 2020-10-09 | 四川轻化工大学 | Explosion-proof monitoring control method and system for low-temperature plasma organic waste gas treatment |
| CN111744341B (en) * | 2020-07-09 | 2022-06-17 | 四川轻化工大学 | Explosion-proof monitoring control method and system for low-temperature plasma organic waste gas treatment |
| CN115121097A (en) * | 2022-08-29 | 2022-09-30 | 江苏美克美斯自动化科技有限责任公司 | Low-temperature plasma waste gas treatment and purification control method and control system |
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| CB03 | Change of inventor or designer information |
Inventor after: Guo Yafeng Inventor after: Mou Guiqin Inventor after: Wang Lin Inventor after: Yu Liqun Inventor before: Yu Liqun Inventor before: Guo Yafeng |
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