CN111744341B - Explosion-proof monitoring control method and system for low-temperature plasma organic waste gas treatment - Google Patents
Explosion-proof monitoring control method and system for low-temperature plasma organic waste gas treatment Download PDFInfo
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- CN111744341B CN111744341B CN202010657436.3A CN202010657436A CN111744341B CN 111744341 B CN111744341 B CN 111744341B CN 202010657436 A CN202010657436 A CN 202010657436A CN 111744341 B CN111744341 B CN 111744341B
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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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- 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
- B01D53/346—Controlling the process
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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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
Abstract
The invention relates to an explosion-proof monitoring control method and system for low-temperature plasma organic waste gas treatment, and solves the technical problem that the prior art cannot simultaneously prevent and treat explosion risks in a short term and a long term. Respectively acquiring the total hydrocarbon concentration C and the gas temperature T of gas in the low-temperature plasma reactor through a total hydrocarbon sensor and a temperature sensor; the controller carries out explosion-proof monitoring control according to two dimensions of the total hydrocarbon concentration C and the gas temperature T, and when the total hydrocarbon concentration C and the gas temperature T are not over limit, a continuous production control strategy is implemented; when the total hydrocarbon concentration C or the gas temperature T exceeds the limit, the potential safety hazard of combustion and explosion is judged to exist, a fire-proof and explosion-proof regulation strategy is implemented, and when the gas temperature T exceeds the limit, the low-temperature plasma reactor is controlled to stop, and meanwhile, a maintenance instruction is sent out.
Description
Technical Field
The invention relates to the technical field of low-temperature plasma organic waste gas treatment, in particular to a method and a system for controlling an explosion-proof monitoring process of low-temperature plasma waste gas treatment.
Background
The low-temperature plasma technology is a new exhaust gas treatment technology developed in recent years, the working principle of the technology is that high-voltage electrodes are adopted to carry out discharge breakdown on gas to generate plasma, and the plasma is a fourth substance form discovered by human beings after gas, liquid and solid, is composed of a large number of high-energy charged particles and neutral particles, is electrically neutral overall and has strong chemical activity. The active substances can decompose the pollutant molecules in a very short time so as to degrade the pollutants. Although the electron temperature is high during the discharge process, the heavy particles have a low temperature, and the whole body shows a low temperature state, so the plasma is called low temperature plasma.
Because this technological principle is simple, and the design installation threshold is lower, compares active carbon adsorption process simultaneously, and the output is useless for a short time, once regard as novel treatment technique to widely popularize, and the present wide application is in the waste gas treatment of multiple trade. However, this technique is based on the principle of high-voltage discharge, and poses a great risk to industries involving the generation of flammable and explosive substances: firstly, a large amount of organic waste gas or dust-containing waste gas is suddenly introduced when the low-temperature plasma reactor operates, so that the concentration of flammable and explosive substances is increased; secondly, substances such as tar, byproducts, particulate matters and the like adhered to the electrode or the cavity surface for a long time can change the dielectric constant change of the electrode or the electrode blocking medium if the cleaning is not timely, the electrode or the electrode is easy to ignite due to local overheating, and the concentration of flammable and combustible substances is continuously increased, so that the electrode or the electrode is easy to combust and explode.
In the prior art, explosion is generally prevented in the waste gas treatment process by reducing the concentration of waste gas one-sidedly, and the method is a temporary measure, but the potential safety hazard of explosion cannot be eliminated in the long term.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an explosion-proof monitoring control method for low-temperature plasma organic waste gas treatment, which solves the technical problem that the prior art cannot simultaneously prevent and treat explosion risks in a short term and a long term.
In order to solve the technical problems, the invention adopts the following technical scheme: an explosion-proof monitoring control method for low-temperature plasma organic waste gas treatment comprises the following steps:
acquiring the total hydrocarbon concentration C and the gas temperature T of gas in the low-temperature plasma reactor; comparing the gas total hydrocarbon concentration C with a lower explosive concentration limit and comparing the gas temperature T with a safe temperature range; implementing a corresponding control strategy according to the comparison result: when the total hydrocarbon concentration C and the gas temperature T are not over limit, implementing a continuous production control strategy; and when the gas total hydrocarbon concentration C or the gas temperature T exceeds the limit, judging that the potential explosion safety hazard exists, implementing an explosion-proof regulation strategy, and when the gas temperature T exceeds the limit, controlling the low-temperature plasma reactor to stop and simultaneously sending out a maintenance instruction.
Further, according to different risk levels of explosion potential safety hazards, implementing corresponding explosion-proof regulation strategies:
short-term low risk rating: the gas temperature T is in a safe temperature range, but the total hydrocarbon concentration C of the gas reaches 50% of the lower limit of the explosive concentration, an alarm signal is sent to a front-end production line, a production instruction is slowed down or suspended, and the low-temperature plasma reactor is controlled to maintain normal operation;
short-term high risk rating: the gas temperature T is in a safe temperature range, but the total hydrocarbon concentration C of the gas reaches 75% of the lower limit of the explosive concentration, the dilution system is controlled to send dilution gas into the low-temperature plasma reactor to reduce the total hydrocarbon concentration C of the gas, the low-temperature plasma reactor is controlled to stop, and meanwhile, an overhaul or production stop instruction is sent;
long-term high risk rating: the total hydrocarbon concentration C of the gas is less than 50% of the lower limit of the explosive concentration, but the gas temperature T exceeds the safe temperature range, the low-temperature plasma reactor is controlled to stop, and meanwhile, a maintenance and production stop instruction is sent out;
blending high risk levels: and controlling the low-temperature plasma reactor to stop and simultaneously sending out an overhaul and stop instruction when the total hydrocarbon concentration C of the gas is more than 50% of the lower limit of the explosive concentration and the gas temperature T exceeds the safe temperature range.
The invention also provides an explosion-proof monitoring control system for low-temperature plasma organic waste gas treatment, which comprises a temperature sensor, a total hydrocarbon sensor and a controller; the temperature sensor is used for collecting the gas temperature T in the low-temperature plasma reactor, and the total hydrocarbon sensor is used for collecting the total hydrocarbon concentration C in the gas in the low-temperature plasma reactor; the controller is used for controlling the anti-explosion monitoring process according to the anti-explosion monitoring control method for the low-temperature plasma organic waste gas treatment, which is disclosed by the invention, according to the gas temperature T and the total hydrocarbon concentration C.
Further, the number of the temperature sensors is at least two, and the number of the total hydrocarbon sensors is at least two; a sensor preposed checking program is configured in the controller and used for judging whether the sensor fails or not before the explosion-proof monitoring control is implemented; the sensor pre-calibration routine operates as follows: respectively generating corresponding signal trend graphs according to signals acquired by two or more similar sensors; and comparing the signal trend graphs of the same type of sensors, if the signal trends on each signal trend graph are obviously inconsistent, judging the sensor fault, and sending a sensor fault alarm signal.
The invention also provides a low-temperature plasma waste gas treatment system which comprises a low-temperature plasma reactor and an explosion-proof monitoring control system for low-temperature plasma organic waste gas treatment, wherein the low-temperature plasma reactor carries out air inlet/outlet through an air inlet fan arranged at an air outlet end.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention simultaneously carries out explosion-proof early warning from two dimensions of concentration and temperature, and overcomes the defect that the prior art carries out early warning by concentration on one side: because the increase of the total hydrocarbon concentration C of the gas is often sudden and difficult to reduce rapidly, and the sensor has delay, the real concentration often exceeds the lower limit of the explosive concentration and cannot be found in time, and if the temperature exceeds the safe operation range, sudden combustion explosion is easily generated. According to the invention, as long as potential safety hazards exist in one of the concentration and the temperature, an explosion-proof regulation strategy can be adopted in time, and the situation that one parameter is out of limit, the other parameter is out of limit and difficult to control quickly is avoided, so that the explosion risk is greatly reduced.
2. The sudden increase in the total hydrocarbon concentration C is often caused by the failure of the front-end production line to perform compliant production or by an abnormality in the pre-exhaust gas pretreatment device. However, the gas temperature T is increased because the rear end is not maintained in place, and even for production efficiency, the maintenance is not performed for a long time, so that substances such as tar, byproducts, particulate matters and the like in the exhaust gas are adhered to the electrode or the chamber surface of the low-temperature plasma reactor, the dielectric constant of the electrode or the electrode blocking medium is changed, local overheating is caused, the internal temperature is continuously increased, and the rapid temperature reduction is difficult. Thus, an increase in the total hydrocarbon concentration C carries a short-term risk, while an increase in the gas temperature T carries a long-term risk, which if left uncontrolled in time, falls into an uncontrollable situation, causing irreparable losses. As the temperature is monitored, the invention can forcibly carry out shutdown maintenance as long as the gas temperature T exceeds the limit, thereby preventing and treating long-term risks and certainly preventing and treating short-term risks of the total hydrocarbon concentration C zone of the gas in time.
3. According to different increasing degrees of the total hydrocarbon concentration C of the gas, different explosion-proof regulation strategies are adopted: first, the total hydrocarbon concentration C of the gas reaches a first threshold value proportion eta of the lower explosive concentration limit1And meanwhile, the explosion risk is lower, and a production reduction non-stop control strategy is adopted, so that the waste gas treatment efficiency is improved. Second threshold value proportion eta for the total hydrocarbon concentration C of the gas to reach the lower explosive concentration limit2And meanwhile, the explosion risk is higher, and a shutdown dilution control strategy is adopted, so that the safety is improved.
4. Because the sensor is in abominable operational environment (in the waste gas) for a long time, the fault rate of sensor can improve, if under the unknown condition of sensor reliability, carry out explosion-proof monitoring control according to fault sensor's monitoring data, can cause very big potential safety hazard. Therefore, the invention provides a sensor preposition checking program, which judges whether the sensor fails before utilizing the monitoring data of the sensor, avoids adopting the monitoring data of the failed sensor and can greatly improve the safety.
Drawings
FIG. 1 is a schematic structural view of a low-temperature plasma exhaust gas treatment system in the present embodiment;
FIG. 2 is a graph showing a comparison between the signal trends of two temperature sensors when the temperature sensors are normal in the present embodiment;
FIG. 3 is a graph showing a comparison of signal trends of two temperature sensors when the temperature sensors fail in the present embodiment;
fig. 4 is a graph showing a comparison of signal trends of two total hydrocarbon sensors when the total hydrocarbon sensor fails in the present embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1, a low-temperature plasma waste gas treatment system includes a low-temperature plasma reactor 1, the low-temperature plasma reactor 1 performs air inlet/outlet through an air inlet fan 3 disposed at an air outlet end, an explosion-proof monitoring control system for low-temperature plasma organic waste gas treatment, and a dilution system for feeding a dilution gas into the low-temperature plasma reactor.
The anti-explosion monitoring control system for low-temperature plasma organic waste gas treatment comprises a temperature sensor 4, a total hydrocarbon sensor 5 and a controller 2; the temperature sensor 4 is used for collecting the gas temperature T in the low-temperature plasma reactor, and the total hydrocarbon sensor 5 is used for collecting the total hydrocarbon concentration C in the low-temperature plasma reactor; the controller 2 is used for controlling the explosion-proof monitoring process according to the gas temperature T and the total hydrocarbon concentration C and the explosion-proof monitoring control process sequence.
The dilution system comprises a dilution gas inlet 6 arranged on the low-temperature plasma reactor 1, and a dilution fan 8 communicated with the dilution gas inlet 6 through a valve 7, wherein the dilution fan 8 is driven by the controller 1, and the dilution fan 8 sends air or inert gas into the low-temperature plasma reactor 1 to dilute waste gas.
Because the sensor is in abominable operational environment for a long time (in the waste gas), the fault rate of sensor can improve, if under the condition of not knowing, carry out explosion-proof monitoring control according to fault sensor's monitoring data, can cause very big potential safety hazard. In order to avoid the situation, the invention adopts multiple sensors to monitor the same monitoring parameters, and the sensors are checked with each other, and the specific scheme is as follows:
the number of the temperature sensors is at least two, and the number of the total hydrocarbon sensors is at least two; a sensor preposed checking program is configured in the controller and used for judging whether the sensor fails or not before the explosion-proof monitoring control is implemented; the sensor pre-calibration routine operates as follows: respectively generating corresponding signal trend graphs according to signals acquired by two or more similar sensors; and comparing the signal trend graphs of the similar sensors, if the signal trends on each signal trend graph are obviously inconsistent, judging the sensor fault, sending a sensor fault alarm signal, simultaneously controlling the low-temperature plasma reactor to stop, detecting the sensor after the stop, and identifying which sensor or sensors have the fault.
The signal trend graph is a trend curve formed by sampling points with sampling time as an abscissa and sampling data as an ordinate according to a time sequence. When the signal trend is judged, the vertical fall (difference of ordinate) from the end point to the starting point on the trend curve is used as the basis, if the fall is within the threshold range [ -h, h ], the trend is judged to be gentle, and if the fall exceeds the threshold range, the trend is judged to be ascending (the vertical fall is greater than 0) or descending (the vertical fall is less than 0).
Referring to fig. 2, the signal trends of the two temperature sensors are consistent and both tend to be gentle. When the situation that the sensor does not break down is judged according to the signal trend graph, the controller randomly selects the monitoring data of one sensor from the plurality of similar sensors as the basis of explosion-proof detection control.
Referring to fig. 3, the signal trends of the two temperature sensors are inconsistent, one tends to be gentle, and the other tends to be obviously downward.
Referring to fig. 4, the two total hydrocarbon sensor signal trends are not consistent, one is in a clear upward trend, and the other is in a flat trend.
The explosion-proof monitoring control program is as follows:
acquiring the total hydrocarbon concentration C and the gas temperature T of gas in the low-temperature plasma reactor; comparing the gas total hydrocarbon concentration C with a lower explosive concentration limit and comparing the gas temperature T with a safe temperature range; implementing a corresponding control strategy according to the comparison result: when the total hydrocarbon concentration C and the gas temperature T are not over limit, implementing a continuous production control strategy; and when the gas total hydrocarbon concentration C or the gas temperature T exceeds the limit, judging that the potential explosion safety hazard exists, implementing an explosion-proof regulation strategy, and when the gas temperature T exceeds the limit, controlling the low-temperature plasma reactor to stop and sending out a maintenance instruction.
The explosion-proof monitoring control program can adopt an explosion-proof regulation and control strategy in time as long as one parameter of concentration and temperature is found to have potential safety hazard, thereby avoiding the situation that one parameter is out of limit, the other parameter is out of limit and is difficult to control quickly, and greatly reducing the explosion risk.
Example 1: although the current gas temperature T is within the safe operating range, the total hydrocarbon concentration C of the gas has reached the lower explosive concentration limit, and the explosion condition is not satisfied at present, the temperature will continue to rise due to the change in the dielectric constant of the electrode blocking medium, and then in the near future, explosion will occur as soon as the temperature exceeds the safe operating range. According to the invention, when the total hydrocarbon concentration C of the gas does not reach the lower explosion concentration limit yet, but is at risk, a corresponding anti-explosion regulation strategy is adopted.
Example 2: although the current total hydrocarbon concentration C of the gas is within a safe range (e.g., less than 5% of the lower explosive concentration limit), the current gas temperature T exceeds the safe operating range, and the explosion condition is not satisfied, if the cause (mainly dielectric constant change) causing the increase of the gas temperature T is not treated, the total hydrocarbon concentration C of the gas suddenly increases and is difficult to rapidly decrease, and once the lower explosive concentration limit is reached, the explosion occurs immediately. When the gas temperature T exceeds the safety range, no matter whether the total hydrocarbon concentration C of the gas exceeds the limit, the invention carries out shutdown maintenance treatment to eliminate the reason causing the increase of the gas temperature T.
According to different risk levels of explosion potential safety hazards, implementing corresponding explosion-proof regulation strategies:
short-term low risk rating: the gas temperature T is within a safe temperature range, but the total hydrocarbon concentration C of the gas reaches a first threshold ratio eta of the lower explosive concentration limit1When the concentration is less than or equal to 25%1Less than or equal to 50 percent, sending an alarm signal to a front-end production line and slowing down or suspending production instructions, but controlling the low-temperature plasma reactor to maintain normal work;
short-term high risk rating: the gas temperature T is within a safe temperature range, but the total hydrocarbon concentration C of the gas reaches a second threshold proportion eta of the lower explosive concentration2At 50% < eta2And (4) less than or equal to 75%, controlling a dilution system to send dilution gas into the low-temperature plasma reactor to reduce the total hydrocarbon concentration C of the gas, controlling the low-temperature plasma reactor to stop, sending out an overhaul instruction, and sending out an instruction of stopping production or starting a standby device.
The total hydrocarbon concentration C of the gas increases, typically due to a line violation or an anomaly in pre-treatment equipment (e.g., pre-water curtain or filtration equipment), and the service should be performed, and the service equipment should stop production or start up a backup (or not stop production if the enterprise is equipped with a backup to handle emissions up to standard).
Long-term high risk rating: the total hydrocarbon concentration C of the gas is less than a first threshold proportion eta of the lower explosive concentration1And if the gas temperature T exceeds the safe temperature range, controlling the low-temperature plasma reactor to stop, sending out a maintenance instruction, and sending out a production stopping or standby device starting instruction.
At this time, the low temperature plasma reactor itself has been abnormal, such as particle deposition or reaction by-product covering the reactor, firstly affecting the heat dissipation of the reactor, secondly, the attachment of the deposition or by-product is easy to cause creeping discharge or creepage to increase the safety risk, and at this time, the maintenance should be performed. And should be taken off-line or on-line during equipment maintenance (and not taken off-line if the enterprise is equipped with a backup to handle emissions compliance).
Blending high risk grades: a first threshold proportion eta where the total hydrocarbon concentration C of the gas reaches the lower explosive concentration limit1And controlling the low-temperature plasma reactor to stop when the gas temperature T exceeds the safe temperature range, sending out a maintenance instruction and sending out an instruction of stopping production or starting a standby device.
First threshold value proportion eta1Proportional to a second threshold value eta2And carrying out value taking according to the risk acceptance degree of the user.
In the specific embodiment, under a short-term high risk level, when the low-temperature plasma reactor is controlled to be shut down, the air inlet fan is controlled to work continuously so that the low-temperature plasma reactor can exhaust gas to reduce the pressure until the total gas hydrocarbon concentration C reaches 25% of the lower explosion limit, and the air inlet fan and the dilution system are controlled to be closed.
In the specific embodiment, when the low-temperature plasma reactor is controlled to be shut down under a long-term high risk level or a mixed high risk level, the air inlet fan is controlled to work continuously so that the low-temperature plasma reactor can exhaust gas to reduce pressure until the total hydrocarbon concentration C of the gas reaches 5% of the lower explosion limit, and the air inlet fan and the dilution system are controlled to be closed.
Claims (5)
1. An explosion-proof monitoring control method for low-temperature plasma organic waste gas treatment is characterized by comprising the following steps:
acquiring the total hydrocarbon concentration C and the gas temperature T of gas in the low-temperature plasma reactor; comparing the gas total hydrocarbon concentration C with a lower explosive concentration limit and comparing the gas temperature T with a safe temperature range; implementing a corresponding control strategy according to the comparison result: when the total hydrocarbon concentration C and the gas temperature T are not over limit, implementing a continuous production control strategy; when the concentration C of total hydrocarbon of the gas or the temperature T of the gas exceeds the limit, judging that potential explosion safety hazards exist, implementing an explosion-proof regulation strategy, and when the temperature T of the gas exceeds the limit, controlling the low-temperature plasma reactor to stop and sending out a maintenance instruction;
according to different risk levels of explosion potential safety hazards, implementing corresponding explosion-proof regulation strategies:
short-term low risk rating: the gas temperature T is within a safe temperature range, but the total hydrocarbon concentration C of the gas reaches a first threshold ratio eta of the lower explosive concentration limit1When the concentration is less than or equal to 25%1Less than or equal to 50 percent, sending an alarm signal to a front-end production line and slowing down or suspending production instructions, but controlling the low-temperature plasma reactor to maintain normal work;
short-term high risk rating: the gas temperature T is within a safe temperature range, but the total hydrocarbon concentration C of the gas reaches a second threshold ratio eta of the lower explosive concentration limit2At 50% < eta2The dilution system is controlled to send dilution gas into the low-temperature plasma reactor to reduce the total hydrocarbon concentration C of the gas, the low-temperature plasma reactor is controlled to stop, a maintenance instruction is sent out at the same time, and an instruction for stopping production or starting a standby device is sent out;
long-term high risk rating: the total hydrocarbon concentration C of the gas is less than the first threshold value proportion eta of the lower explosive concentration limit1But the gas temperature T exceeds the safe temperature range, the low-temperature plasma reactor is controlled to stop, a maintenance instruction is sent out at the same time, and an instruction for stopping production or starting a standby device is sent out;
blending high risk grades: total hydrocarbons of gasA first threshold value proportion eta at which the concentration C reaches the lower explosive concentration limit1And the gas temperature T exceeds the safe temperature range, the low-temperature plasma reactor is controlled to stop, meanwhile, a maintenance instruction is sent out, and an instruction for stopping production or starting a standby device is sent out;
under a short-term high risk level, when the low-temperature plasma reactor is controlled to stop, the air inlet fan is controlled to work continuously so that the low-temperature plasma reactor can exhaust gas to reduce pressure until the concentration C of total hydrocarbon of gas reaches 25% of the lower explosion limit, and the air inlet fan and the dilution system are controlled to be closed;
and under a long-term high risk level or a mixed high risk level, when the low-temperature plasma reactor is controlled to stop, controlling the air inlet fan to continuously work so that the low-temperature plasma reactor can exhaust gas to reduce the pressure until the total gas hydrocarbon concentration C reaches 5% of the lower explosion limit, and controlling the air inlet fan and the dilution system to be closed.
2. An explosion-proof monitoring control system for low-temperature plasma organic waste gas treatment is characterized by comprising a temperature sensor, a total hydrocarbon sensor and a controller; the temperature sensor is used for collecting the gas temperature T in the low-temperature plasma reactor, and the total hydrocarbon sensor is used for collecting the total hydrocarbon concentration C in the low-temperature plasma reactor; the controller is used for controlling the explosion-proof monitoring process according to the explosion-proof monitoring control method for low-temperature plasma organic waste gas treatment as claimed in claim 1 according to the gas temperature T and the total hydrocarbon concentration C.
3. An explosion-proof monitoring and control system for low temperature plasma organic waste gas treatment according to claim 2, wherein the number of the temperature sensors is at least two, and the number of the total hydrocarbon sensors is at least two; a sensor preposed checking program is configured in the controller and used for judging whether the sensor fails or not before the explosion-proof monitoring control is implemented; the sensor pre-calibration routine operates as follows: respectively generating corresponding signal trend graphs according to signals acquired by two or more similar sensors; and comparing the signal trend graphs of the same type of sensors, if the signal trends on each signal trend graph are obviously inconsistent, judging the sensor fault, and sending a sensor fault alarm signal.
4. A low-temperature plasma organic waste gas treatment system comprises a low-temperature plasma reactor and is characterized in that the low-temperature plasma reactor is used for carrying out air inlet/outlet through an air inlet fan arranged at an air outlet end; the explosion-proof monitoring control system for low-temperature plasma organic waste gas treatment is further included according to claim 2.
5. The low temperature plasma organic waste gas treatment system according to claim 4, further comprising a dilution system for feeding a dilution gas into the low temperature plasma reactor.
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