CN113418199B - Fault self-detection module and method of heat accumulating type thermal oxidation device - Google Patents
Fault self-detection module and method of heat accumulating type thermal oxidation device Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 230000003647 oxidation Effects 0.000 title claims abstract description 29
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 39
- 238000005338 heat storage Methods 0.000 claims abstract description 18
- 230000002159 abnormal effect Effects 0.000 claims description 39
- 239000002912 waste gas Substances 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 25
- 239000002994 raw material Substances 0.000 claims description 18
- 238000009825 accumulation Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 11
- 230000001172 regenerating effect Effects 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 5
- 230000007257 malfunction Effects 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 3
- 239000012895 dilution Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
- F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
- F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/10—Arrangement of sensing devices
- F23G2207/101—Arrangement of sensing devices for temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/20—Waste supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/30—Oxidant supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention relates to a fault self-detection module of a heat accumulating type thermal oxidation device, wherein a combustion chamber, a first heat accumulating chamber, a second heat accumulating chamber and a third heat accumulating chamber are arranged in an RTO furnace, and the fault self-detection module comprises: the device comprises an exhaust gas LEL value measuring module, a regenerator temperature measuring module, a combustion chamber temperature control module and a poppet valve switching control module; and the heat storage chamber temperature measuring module is connected with the poppet valve switching control module and is used for balancing the temperature of each heat storage chamber. The invention has the beneficial effects that: the invention provides a fault self-detection module of a heat accumulating type thermal oxidation device, which can pre-judge the reasons of faults through the action among modules, further count the accumulated times of different faults through an alarm counting module, reduce the work complexity of field operators and ensure the safe and stable operation of the heat accumulating type thermal oxidation device.
Description
Technical Field
The invention belongs to the technical field of heat accumulating type thermal oxidation devices, and particularly relates to a fault self-detection module and a fault self-detection method of a heat accumulating type thermal oxidation device.
Background
The heat accumulating type thermal oxidation furnace is a way to solve the problem of waste gas of Volatile Organic Compounds (VOCs), and is widely applied to the coal chemical industry. The sample gas at the tail section of the methanol washing process in the coal chemical industry has low oxygen concentration and high organic matter concentration, and the heat accumulating type thermal oxidation device can fully burn waste gas, so that the flue gas emission meets the environmental protection requirement. The abnormal condition of the heat accumulating type combustion device can cause that the emission of waste flue gas can not meet the requirement of environmental protection, and the heat accumulating type thermal oxidation device can explode seriously. The safety of the regenerative thermal oxidizer itself is very important. How to realize the safe operation of the heat accumulating type thermal oxidation device is particularly important for pre-judging the possible risks.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a fault self-detection module and a fault self-detection method for a heat accumulating type thermal oxidation device.
This kind of heat accumulation formula hot oxidation unit's trouble self test module is equipped with combustion chamber, regenerator one, regenerator two and regenerator three in the RTO stove, and trouble self test module includes: the device comprises an exhaust gas LEL value measuring module, a regenerator temperature measuring module, a combustion chamber temperature control module and a poppet valve switching control module; the heat storage chamber temperature measuring module is connected with the poppet valve switching control module and is used for balancing the temperature of each heat storage chamber;
the heat storage chamber temperature measuring module comprises a thermometer T4, a thermometer T5 and a thermometer T6 which are arranged on temperature measuring points arranged in a first heat storage chamber, a second heat storage chamber and a third heat storage chamber;
the combustion chamber temperature control module comprises a combustor B1, a thermal bypass valve V7 in the combustion chamber and three temperature measuring points; a thermometer T1, a thermometer T2 and a thermometer T3 are respectively arranged on the three temperature measuring points; a corresponding temperature controller is arranged on the combustor B1;
the poppet valve switching control module comprises an air inlet valve V1, an air inlet valve V3, an air inlet valve V5, an air outlet valve V2, an air outlet valve V4 and an air outlet valve V6;
a dilution fan F1 is arranged on the raw material waste gas inlet pipeline, and a waste gas mixing pipeline LEL value measuring device is also arranged on the raw material waste gas inlet pipeline; the inlet pipeline of the raw material waste gas is respectively connected into the first regenerator, the second regenerator and the third regenerator through an air inlet valve V1, an air inlet valve V3 and an air inlet valve V5; the combustion chamber is connected into an inlet pipeline of the chimney through a thermal bypass valve V7; and the purified gas outlet pipelines of the first regenerator, the second regenerator and the third regenerator are respectively connected to a chimney through a gas outlet valve V2, a gas outlet valve V4 and a gas outlet valve V6.
Preferably, the fault self-detection module is further provided with an alarm counting module for counting the accumulated times of different faults.
Preferably, the exhaust gas LEL value measuring module is used for measuring an LEL value of the exhaust gas mixing pipeline, and the LEL value is a percentage of the lower explosion limit LEL.
The self-detection method of the fault self-detection module of the heat accumulating type thermal oxidation device comprises the following steps:
step 1, judging whether faults exist in an LEL value measuring device of the waste gas mixing pipeline, a thermometer T1, a thermometer T2, a thermometer T3, a thermometer T4, a thermometer T5 and a thermometer T6 in the RTO furnace, and if no faults exist, executing a step 2; if the fault is found, the equipment with the fault is overhauled;
if the opening degree of the hot bypass valve V7 is not changed, the alarm counting module prompts the hot bypass valve V7 to alarm abnormally, and if the prompt of the hot bypass valve V7 to alarm abnormally is still set at fixed time intervals, the alarm counting module counts N1＝1+N1；
If the opening degree of the temperature controller of the combustor B1 is not changed, the alarm counting module prompts the combustor B1 to alarm abnormally, and if the prompt of the combustor B1 to alarm abnormally is still set at fixed time intervals, the alarm counting module N is used for counting the alarms2＝1+N2；
And 4, if the temperature difference between any adjacent regenerators in the first regenerator, the second regenerator and the third regenerator is higher than a set value: after the time delay is set for a long time, the alarm counting module prompts an abnormal alarm of the regenerator; if the temperature difference among all the adjacent regenerators in the first regenerator, the second regenerator and the third regenerator is not higher than a set value, finishing the fault self-detection; under the condition that the alarm counting module prompts the abnormal alarm of the heat storage chamber, if the prompt of the abnormal alarm of the heat storage chamber with a fixed time interval is still in place, the alarm counting N is carried out3＝1+N3Ending the fault self-detection;
step 6, setting the normal time from any one valve opening command to a full-open state or from a closing command to a full-close state of an air inlet valve V1, an air inlet valve V3, an air inlet valve V5, an air outlet valve V2, an air outlet valve V4 and an air outlet valve V6 to be T, and when the time from the valve opening command to the full-open state exceeds 3/2T-2T or the valve full-open and full-close signals are received at the same time, prompting the abnormal alarm of the valve by an alarm counting module; otherwise, finishing the fault self-detection; under the condition that the alarm counting module prompts an abnormal alarm of a certain valve, after a fixed time interval, if the abnormal alarm of the valve prompted by the alarm counting module still exists, the alarm counting N is carried out5＝1+N5Ending the fault self-detection;
step 7, counting alarm count N once per month1、N2、N3、N4、N5And outputting corresponding counting data; and returning to execute the steps 1 to 6 until the fault self-detection module is manually shut down.
Preferably, the set time that the actually measured temperature values of the combustion chamber exceed the working temperature values in the step 3 is 25-35 minutes; the fixed time period for which the indication of the abnormal alarm of the hot bypass valve V7 still exists is set to 30 minutes, and the fixed time period for which the indication of the abnormal alarm of the burner B1 still exists is set to 30 minutes.
Preferably, the prompt of the regenerator abnormity alarm in the step 4 is still set at a fixed time interval of 30-40 minutes.
Preferably, the alarm value of the LEL value in the step 5 is 25% LEL +/-3% LEL; the delay time is 2 seconds; and judging whether the time interval of the prompt of the raw material waste gas abnormity alarm is 30 minutes.
The invention has the beneficial effects that:
the invention provides a fault self-detection module of a heat accumulating type thermal oxidation device, which can pre-judge the reasons of faults through the action among modules, further count the accumulated times of different faults through an alarm counting module, reduce the work complexity of field operators and ensure the safe and stable operation of the heat accumulating type thermal oxidation device.
The invention provides a fault self-detection mode of a heat accumulating type thermal oxidation device, which realizes fault pre-judgment of a combustion device of a heat accumulating chamber through the fault self-detection mode of main equipment on the premise of not influencing the normal operation of the heat accumulating type thermal oxidation device, so that the problem of difficulty in fault judgment of the heat accumulating type thermal oxidation device is solved, field operators and maintainers can accurately judge faults, and the safe and stable operation of the heat accumulating type thermal oxidation device is ensured.
Drawings
FIG. 1 is a flow chart of a fault self-detection of a heat accumulating type thermal oxidation treatment device;
fig. 2 is a simplified flow chart of a regenerative thermal oxidation treatment apparatus.
Description of reference numerals: the device comprises a regenerator temperature measuring module 1, a combustion chamber temperature control module 2, a poppet valve switching control module 3, an exhaust gas LEL value measuring module 4, an RTO furnace 5, a combustion chamber 6, a regenerator I7, a regenerator II 8, a regenerator III 9, a chimney 10 and an exhaust gas mixing pipeline LEL value measuring device 11.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for a person skilled in the art, several modifications can be made to the invention without departing from the principle of the invention, and these modifications and modifications also fall within the protection scope of the claims of the present invention.
Example one
The first fault self-detection module that provides a heat accumulation formula thermal oxidation device as shown in fig. 2 is equipped with combustion chamber 6, regenerator one 7, regenerator two 8 and regenerator three 9 in RTO furnace 5, and the fault self-detection module includes: the device comprises an exhaust gas LEL value measuring module 4, a regenerator temperature measuring module 1, a combustion chamber temperature control module 2 and a poppet valve switching control module 3; the system is also provided with an alarm counting module for counting the accumulated times of different faults; the regenerative chamber temperature measuring module 1 is connected with the poppet valve switching control module 3 and is used for balancing the temperature of each regenerative chamber; the heat accumulation chamber temperature measuring module 1 comprises a first heat accumulation chamber 7, a second heat accumulation chamber 8 and a thermometer T4, a thermometer T5 and a thermometer T6 which are arranged on temperature measuring points arranged in a third heat accumulation chamber 9;
the waste gas LEL value measuring module 4 is used for measuring an LEL value of the waste gas mixing pipeline, wherein the LEL value is the percentage of the lower explosion limit LEL;
the combustion chamber temperature control module 2 comprises a combustor B1, a thermal bypass valve V7 in the combustion chamber 6 and three temperature measuring points; a thermometer T1, a thermometer T2 and a thermometer T3 are respectively arranged on the three temperature measuring points; a corresponding temperature controller is arranged on the combustor B1;
the poppet valve switching control module 3 comprises an intake valve V1, an intake valve V3, an intake valve V5, an exhaust valve V2, an exhaust valve V4 and an exhaust valve V6;
a dilution fan F1 is arranged on the raw material waste gas inlet pipeline, and a waste gas mixing pipeline LEL value measuring device 11 is also arranged on the raw material waste gas inlet pipeline; the inlet pipeline of the raw material waste gas is respectively connected into the first regenerator 7, the second regenerator 8 and the third regenerator 9 through an air inlet valve V1, an air inlet valve V3 and an air inlet valve V5; the combustion chamber 6 is connected into an inlet pipeline of the chimney 10 through a thermal bypass valve V7; and the purified gas outlet pipelines of the first regenerator 7, the second regenerator 8 and the third regenerator 9 are respectively connected to the chimney 10 through a gas outlet valve V2, a gas outlet valve V4 and a gas outlet valve V6.
Example two
On the basis of the first embodiment, as shown in fig. 1, a second embodiment of the present application provides a self-detection method for a fault self-detection module of a regenerative thermal oxidizer in the first embodiment, which specifically includes:
the combustion chamber temperature control module is connected with the combustor control module and the heat bypass control module and is used for controlling the normal temperature of the combustion chamber. When the actually measured temperature value exceeds the working temperature value within 25-35 minutes, the alarm counting module prompts an abnormal alarm of the combustion chamber. Under the condition of abnormal alarm of the combustion chamber, further under the condition that the opening feedback of the thermal bypass valve is not changed, the alarm counting module prompts the abnormal alarm of the thermal bypass valve and counts N every 30min, if the abnormal alarm of the thermal bypass valve still exists11,2,3 …; furthermore, under the condition that the opening of the temperature controller of the combustor is not changed, the alarm is countedThe module prompts the abnormal alarm of the burner, the abnormal alarm of the opening degree of the temperature controller of the burner is sent every 30min, and if the abnormal alarm of the opening degree of the temperature controller of the burner still exists, the alarm is counted by N2＝1,2,3…。
And the heat storage chamber temperature measuring module is connected with the poppet valve switching control module and is used for balancing the temperature of each heat storage chamber. When the temperature of 3 heat storage chambers and the adjacent temperature difference of any two heat storage chambers is higher than 10-15 ℃, the time is delayed for 30-40 minutes, and the system displays a heat storage body fault alarm. For example, when the temperature of the thermometer T5 (300 ℃) to the temperature of the thermometer T4 (290 ℃) is more than or equal to 10 ℃ and the time delay is 30 minutes, the system displays the abnormal alarm of the regenerator. And every 30min, if the abnormal alarm of the regenerator still exists, the alarm count N is carried out3＝1,2,3…。
The exhaust gas LEL value measuring module is used for measuring an LEL value of the exhaust gas mixing pipeline. When the actually measured LEL value (LEL1) exceeds (25% LEL +/-3% LEL), delaying for 2 seconds, and prompting the raw material waste gas abnormal alarm by the alarm counting module. And every 30min, if the raw material waste gas abnormal alarm still exists, the alarm count N is given41,2,3 …. For example, when LEL1 is more than or equal to 24 percent LEL and is delayed for 2 seconds, the alarm counting module prompts an alarm of the abnormity of the raw material waste gas. And every 30min, if the abnormal alarm of the regenerator still exists, the alarm count N is carried out4＝1,2,3…。
The normal time from the opening instruction of the poppet valve to the full-open state (or from the closing instruction to the full-close state) is set to be T, and when the time from the opening instruction to the full-open state exceeds 3/2T-2T or a full-open and full-close signal of the poppet valve is received at the same time, the alarm counting module prompts an alarm for the abnormity of the poppet valve. For example, when the normal time for feeding back the information from the opening command to the full open state of the intake valve V1 is T (12s), and the actual time exceeds 3/2T to 2T (18s to 24s), or when the full open feedback information (V1 to ZSO) of the intake valve V1 and the full close feedback information (V1 to ZSC) appear together, the system displays a poppet valve malfunction alarm. And every 30min, if the lift valve abnormal alarm still exists, the alarm count N is given5＝1,2,3…。
The operational LEL value of the mixed exhaust gas of the exhaust gas mixing pipe must not exceed 25%.
Alarm counting module (N)1、N2、N3、N4、N5) Counting once every month, outputting counting data, and restarting counting for the next month after zero clearing. The site personnel can judge the position of a possible fault point of the RTO furnace in advance by analyzing the statistical count of different alarms per month. Further, the safe and stable operation of the heat accumulating type thermal oxidation device is guaranteed.
The fault self-detection of the heat accumulating type thermal oxidation device can be used as a fault early warning device in the equipment operation process of the heat accumulating type thermal oxidation furnace. The device can timely and accurately remind the operator of the fault of the heat accumulating type thermal oxidation furnace, thereby protecting the safety of the operator and saving the fault judgment time of the maintainer.
Claims (4)
1. The utility model provides a self test method of heat accumulation formula thermal oxidation device's trouble self test module, heat accumulation formula thermal oxidation device includes trouble self test module, is equipped with combustion chamber (6), regenerator (7), regenerator two (8) and regenerator three (9) in RTO stove (5), and trouble self test module includes: the device comprises an exhaust gas LEL value measuring module (4), a regenerator temperature measuring module (1), a combustion chamber temperature control module (2) and a poppet valve switching control module (3); the heat storage chamber temperature measuring module (1) is connected with the poppet valve switching control module (3); the heat accumulation chamber temperature measuring module (1) comprises a heat accumulation chamber I (7), a heat accumulation chamber II (8) and a thermometer T4, a thermometer T5 and a thermometer T6 which are arranged on temperature measuring points arranged in a heat accumulation chamber III (9); the combustion chamber temperature control module (2) comprises a combustor B1, a thermal bypass valve V7 in the combustion chamber (6) and three temperature measuring points; a thermometer T1, a thermometer T2 and a thermometer T3 are respectively arranged on the three temperature measuring points; a corresponding temperature controller is arranged on the combustor B1; the poppet valve switching control module (3) comprises an air inlet valve V1, an air inlet valve V3, an air inlet valve V5, an air outlet valve V2, an air outlet valve V4 and an air outlet valve V6; a dilution fan F1 is arranged on the raw material waste gas inlet pipeline, and a waste gas mixing pipeline LEL value measuring device (11) is also arranged on the raw material waste gas inlet pipeline; the inlet pipeline of the raw material waste gas is respectively connected into a first regenerator (7), a second regenerator (8) and a third regenerator (9) through an air inlet valve V1, an air inlet valve V3 and an air inlet valve V5; the combustion chamber (6) is connected into an inlet pipeline of the chimney (10) through a thermal bypass valve V7; purified gas outlet pipelines of the first regenerator (7), the second regenerator (8) and the third regenerator (9) are respectively connected to a chimney (10) through a gas outlet valve V2, a gas outlet valve V4 and a gas outlet valve V6; the fault self-detection module is also provided with an alarm counting module for counting the accumulated times of different faults; the method is characterized by comprising the following steps:
step 1, judging whether faults exist in an LEL value measuring device (11) of the waste gas mixing pipeline and a thermometer T1, a thermometer T2, a thermometer T3, a thermometer T4, a thermometer T5 and a thermometer T6 in an RTO furnace (5), and if no faults exist, executing a step 2; if the fault is found, the equipment with the fault is overhauled;
step 2, counting the alarm number N every month1、N2、N3、N4、N5The initial counting times are reset, and the temperature of the combustion chamber (6) is controlled through the combustion chamber temperature control module (2);
step 3, if the actually measured temperature value of the combustion chamber (6) exceeds the working temperature value within a set time period, the alarm counting module prompts an abnormal alarm of the combustion chamber (6); if the actual measurement temperature value of the combustion chamber (6) does not exceed the working temperature value within the set time period, finishing the fault self-detection; and under the condition of abnormal alarm of the combustion chamber (6):
if the opening degree of the hot bypass valve V7 is not changed, the alarm counting module prompts the hot bypass valve V7 to alarm abnormally, and if the prompt of the hot bypass valve V7 to alarm abnormally is still set at fixed time intervals, the alarm counting module counts N1=1+N1；
If the opening degree of the temperature controller of the combustor B1 is not changed, the alarm counting module prompts the combustor B1 to alarm abnormally, and if the prompt of the combustor B1 to alarm abnormally is still set at fixed time intervals, the alarm counting module N is used for counting the alarms2=1+N2；
And 4, if the temperature difference between any adjacent regenerators in the first regenerator (7), the second regenerator (8) and the third regenerator (9) is higher than a set value: after the time delay is set for a long time, the alarm counting module prompts an abnormal alarm of the regenerator; if a regeneratorWhen the temperature difference among all adjacent regenerators in the first regenerator (7), the second regenerator (8) and the third regenerator (9) is not higher than a set value, finishing the fault self-detection; under the condition that the alarm counting module prompts the abnormal alarm of the heat storage chamber, if the prompt of the abnormal alarm of the heat storage chamber with a fixed time interval is still in place, the alarm counting N is carried out3=1+N3Ending the fault self-detection;
step 5, if the LEL value obtained by actually measuring the LEL value of the waste gas mixing pipeline (11) exceeds the alarm value, after the time delay is set, the alarm counting module prompts the abnormal alarm of the raw material waste gas, and after the fixed time interval, if the prompt of the abnormal alarm of the raw material waste gas is still in the process, the alarm counting N is carried out4=1+N4Ending the fault self-detection; if the LEL value obtained by the actually measured LEL value measuring device (11) of the waste gas mixing pipeline does not exceed the alarm value, ending the fault self-detection;
step 6, setting the normal time from any one valve opening command to a full-open state or from a closing command to a full-close state of an air inlet valve V1, an air inlet valve V3, an air inlet valve V5, an air outlet valve V2, an air outlet valve V4 and an air outlet valve V6 to be T, and when the time from the valve opening command to the full-open state exceeds 3/2T-2T or the valve full-open and full-close signals are received at the same time, prompting the abnormal alarm of the valve by an alarm counting module; otherwise, finishing the fault self-detection; under the condition that the alarm counting module prompts an abnormal alarm of a certain valve, after a fixed time interval, if the abnormal alarm of the valve prompted by the alarm counting module still exists, the alarm counting N is carried out5=1+N5Ending the fault self-detection;
step 7, counting alarm count N once per month1、N2、N3、N4、N5And outputting corresponding counting data; and returning to execute the steps 1 to 6 until the fault self-detection module is manually shut down.
2. The self-testing method of a malfunction self-testing module of a regenerative thermal oxidizer of claim 1, wherein: in the step 3, the set time for the actually measured temperature values of the combustion chamber (6) to exceed the working temperature value is 25-35 minutes; the fixed time period for which the indication of the abnormal alarm of the hot bypass valve V7 still exists is set to 30 minutes, and the fixed time period for which the indication of the abnormal alarm of the burner B1 still exists is set to 30 minutes.
3. The self-testing method of a malfunction self-testing module of a regenerative thermal oxidizer of claim 1, wherein: and 4, the interval of the fixed time interval of the prompt of the abnormal alarm of the regenerator in the step 4 is 30-40 minutes.
4. The self-testing method of a malfunction self-testing module of a regenerative thermal oxidizer of claim 1, wherein: in the step 5, the alarm value of the LEL value is 25% LEL +/-3% LEL; the delay time is 2 seconds; and judging whether the time interval of the prompt of the raw material waste gas abnormity alarm is 30 minutes.
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| KR100954736B1 (en) * | 2009-09-23 | 2010-04-23 | (주) 테크윈 | Regenerative combustion apparatus having removable rotary valve contacted directly upper combustion apparatus and capability of adjusting gab of contacting by thermal expansion |
| CN209084789U (en) * | 2018-07-02 | 2019-07-09 | 上海安居乐环保科技股份有限公司 | Wave type exhaust gas cleaner |
| CN209229756U (en) * | 2018-11-06 | 2019-08-09 | 杨志刚 | It is a kind of to detect the safety device for improving heat accumulation type thermal oxidation furnace based on LEL |
| CN110822455B (en) * | 2019-11-04 | 2021-02-19 | 恩宜瑞(江苏)环境发展有限公司 | Novel heat accumulation type thermal oxidation chamber safety energy-saving control system |
| CN111076193B (en) * | 2019-12-17 | 2021-12-28 | 浙江天地环保科技股份有限公司 | Automatic adjusting and controlling system and method for temperature of combustion chamber of heat accumulating type thermal oxidation furnace |
-
2021
- 2021-06-21 CN CN202110687980.7A patent/CN113418199B/en active Active
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