CN212781709U - SIS safety protection system of direct thermal desorption soil remediation equipment - Google Patents
SIS safety protection system of direct thermal desorption soil remediation equipment Download PDFInfo
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- CN212781709U CN212781709U CN202022028169.1U CN202022028169U CN212781709U CN 212781709 U CN212781709 U CN 212781709U CN 202022028169 U CN202022028169 U CN 202022028169U CN 212781709 U CN212781709 U CN 212781709U
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Abstract
The utility model discloses a SIS safety protection system of direct thermal desorption soil remediation equipment, which comprises a sensing system, a logic numerical control system and an execution system, wherein the sensing system is used for detecting the operating parameters of an automatic production system in real time and sending the operating parameters into the logic numerical control system; the logic numerical control system compares the operating parameters detected by the sensing system with various threshold values, performs logic operation and outputs a control instruction to the actuating mechanism; and the executing mechanism automatically or indicates manual execution of corresponding actions according to the control instruction of the logic numerical control system. The safety protection system can act in time in the production process, and the safe production is ensured.
Description
Technical Field
The utility model belongs to the technical field of soil remediation, in particular to SIS (safety instruments System) safety protection system of direct thermal desorption soil remediation equipment.
Background
When the soil in a polluted site is subjected to ex-situ remediation, according to the difference of pollutants in the soil, leaching, normal-temperature desorption and thermal desorption modes are mainly adopted, wherein the direct thermal desorption is to directly heat the high-risk soil by using a fuel gas heating mode so as to separate organic matters, polycyclic aromatic hydrocarbons, chloride and the like in the soil from the soil.
The direct thermal desorption machine adopts a countercurrent mode to process, the material and the air flow speed are opposite, the temperature in the kiln is 0-800 ℃, and the discharging temperature is 0-550 ℃. Heat is provided by a natural gas burner. At the feed end, part of the dust is sent to a cyclone dust collector to be discharged. And the desorbed soil is fed into a finished greenhouse after being cooled and humidified by adding water through a discharge screw.
And the waste gas discharged by the thermal desorption machine enters a cyclone dust collector for dust removal through a flue gas pipeline. The flue gas after cyclone dust removal enters a second combustion chamber for high-temperature combustion, and the heat of the second combustion chamber is provided by a natural gas burner. The temperature of the second combustion chamber is less than or equal to 1100 ℃, and the removal rate of organic matters is more than 99.9 percent.
And waste gas discharged from the secondary combustion chamber enters a heat exchanger for heat exchange, and the waste gas after heat exchange enters a quench tower and is deacidified by alkali liquor. The cooled flue gas enters a bag-type dust remover for dust removal, and is sent into a spray tower through a draught fan after being subjected to dry powder (slaked lime and activated carbon) sprayed in the bag-type dust remover, and the flue gas after being subjected to washing treatment is discharged through a chimney.
The existing repair equipment site generally comprises an electric control system and an automatic control system, basic safety measures are only embodied in the automatic control system, once the automatic control system has problems or energy input problems, the system cannot make timely and reasonable response at the first time, and personal injury, safety accidents or huge economic loss easily occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a direct thermal desorption soil repair equipment's SIS safety protection system, it can in time move in process of production, guarantees that the safety of production goes on.
In order to achieve the above purpose, the solution of the present invention is:
an SIS safety protection system of direct thermal desorption soil remediation equipment comprises a sensing system, a logic numerical control system and an execution system, wherein the sensing system is used for detecting the operation parameters of an automatic production system in real time and sending the operation parameters into the logic numerical control system; the logic numerical control system compares the operating parameters detected by the sensing system with various threshold values, performs logic operation and outputs a control instruction to the actuating mechanism; and the executing mechanism automatically or indicates manual execution of corresponding actions according to the control instruction of the logic numerical control system.
The sensing system comprises a first pressure sensor for detecting the pressure of the induced draft fan, a second pressure sensor for detecting the pressure of the combustion fan, a third pressure sensor for detecting the pressure of the kiln body and a fourth pressure sensor for detecting the pressure of the air, the corresponding logic numerical control system comprises a first judging circuit and a first logic gate circuit, and the first logic gate circuit comprises a first OR gate with five inputs and a first AND gate with two inputs; the first judgment circuit judges the relation between the pressure of the induced draft fan, the pressure of the combustion fan, the pressure of the kiln body and the air pressure and respective thresholds, and respectively inputs high levels to the first input end to the fourth input end of the first OR gate when the pressure of the induced draft fan is lower than the threshold, the pressure of the combustion fan is lower than the threshold, the pressure of the kiln body is higher than the threshold and the air pressure is lower than the threshold, otherwise, inputs low levels, and inputs high levels to the fifth input end of the first OR gate when a flameout signal exists; the output end of the first OR gate is connected with the first input end of the first AND gate, the second input end of the first AND gate is connected with the confirmation signal which is purged for a specified time, and the output end of the first AND gate is connected with the reignition signal.
The sensing system comprises a fifth pressure sensor for detecting the pressure of the induced draft fan, a sixth pressure sensor for detecting the pressure of the combustion-supporting fan, a seventh pressure sensor for detecting the pressure of the secondary combustion chamber and an eighth pressure sensor for detecting the pressure of the air, and the corresponding logic numerical control system comprises a second judgment circuit and a second logic gate circuit, wherein the second logic gate circuit comprises a second OR gate with five inputs and a second AND gate with two inputs; the second judgment circuit judges the relationship between the pressure of the induced draft fan, the pressure of the combustion-supporting fan of the secondary combustion engine, the pressure of the secondary combustion chamber and the air pressure and respective threshold values, and respectively inputs high level to the first to fourth input ends of the second OR gate when the pressure of the induced draft fan is lower than the threshold value, the pressure of the combustion-supporting fan of the secondary combustion engine is lower than the threshold value, the pressure of the secondary combustion chamber is higher than the threshold value and the air pressure is lower than the threshold value, otherwise, the low level is input, and the second judgment circuit also inputs high level to the fifth input end of the second; the output end of the second OR gate is connected with the first input end of the second AND gate, the second input end of the second AND gate is connected with the confirmation signal which is purged for the specified time, and the output end of the second AND gate is connected with the reignition signal.
The sensing system comprises a first temperature sensor for detecting the outlet temperature of the quenching tower and a liquid level sensor for detecting the liquid level of a water tank of the quenching tower, and the corresponding logic numerical control system comprises a third judging circuit and a third logic gate circuit, wherein the third logic gate circuit comprises a third OR gate with two inputs and a third AND gate with one input; and the third judgment circuit respectively inputs high level to the first input end and the second input end of the third OR gate when judging that the outlet temperature of the quenching tower is higher than the threshold value and the liquid level of the water tank of the quenching tower is lower than the threshold value, otherwise, the low level is input, the output end of the third OR gate is connected with an alarm signal and the input end of a third AND gate, and the output end of the third AND gate is connected with a switching pump/inspection water tank liquid level signal.
The sensing system comprises a ninth pressure sensor for detecting the pressure of the combustion chamber, and the corresponding logic numerical control system comprises a fourth judging circuit and a fourth logic gate circuit, wherein the fourth logic gate circuit comprises an input fourth AND gate; the fourth judgment circuit judges the relation between the pressure of the second combustion chamber and the threshold value, and inputs a high level to the input end of the fourth AND gate when the pressure of the second combustion chamber is higher than the threshold value, otherwise, inputs a low level; the output end of the fourth AND gate is connected with a pressure relief window opening signal to control the pressure relief window to be automatically opened.
The sensing system comprises a sensor for detecting whether the thermal desorption machine or the secondary fuel is flamed out, the corresponding logic numerical control system comprises a fifth judging circuit and a fifth logic gate circuit, and the fifth logic gate circuit comprises a first NOT gate; the fifth judgment circuit judges that high level is input to the first NOT gate in the thermal desorption machine or the second NOT gate, and otherwise, low level is input; the output end of the first NOT gate is connected with a stop signal of the combustion-supporting fan/the secondary combustion-supporting fan of the thermal desorption machine.
The sensing system comprises a second temperature sensor for detecting the temperature of the bag-type dust removal inlet, the corresponding logic numerical control system comprises a sixth judging circuit and a sixth logic gate circuit, and the sixth logic gate circuit comprises a fourth OR gate with two inputs and a fifth AND gate with one input; the sixth judgment circuit judges whether the temperature of the bag dust removal inlet is in a threshold range, and respectively inputs high level to the first input end to the second input end of the fourth OR gate when the temperature is higher than the highest value of the threshold range or lower than the lowest value of the threshold range, otherwise, inputs low level; the output end of the sixth OR gate is connected with the alarm signal and the input end of the fifth AND gate, and the output end of the fifth AND gate is connected with the bypass valve opening signal.
After the scheme is adopted, the utility model discloses following improvement has:
(1) the utility model discloses at first with strong points: only starting from system safety, not acting at ordinary times, and if the production process exceeds a safety control range, timely entering action to enable the production process to enter a safe state; secondly, the system is independent, when the operating system breaks down or energy is interrupted, the SIS safety system automatically (manually if necessary) completes the preset action, so that the operating personnel and the process device are in a safe state; finally, the control logic function is strong, the SIS system is safe, sometimes is set aiming at points, sometimes is an interlocking scheme, but all the principles are guaranteed, and the method is simple, instant and effective, namely, one step can be carried out without secondary;
(2) in the soil remediation thermal desorption system, because the system mainly uses natural gas as a heating raw material in operation, the temperature in the production process is high, the emission standard of tail gas treatment is high, and some automatic control and electrical data can be returned into the SIS system through risk grade evaluation, thereby achieving the purpose of safety protection.
Compare only DCS PLC equipment production among the prior art, the utility model has the advantages of:
(1) the system provides safety protection for personnel health, equipment and environment during the driving, parking operation and maintenance of the production device. No matter the fault danger of the production device, the danger caused by human factors and the danger caused by some irresistible factors, the SIS can respond in time and give corresponding logic signals to enable the production device to enter a predefined safety interlocking or parking working condition, prevent the occurrence of the danger and the deterioration and diffusion of the accident, reduce the harm and the loss to the minimum degree, and ensure the safety of production equipment, environment and personnel;
(2) the system has high reliability, usability and maintainability. When the SIS system per se fails, the safety protection function can still be provided or the operation can still be carried out in a manual state. The SIS system is an independent and complete system established on the basis of a DCS/PLC system, only data monitoring, storage and analysis are carried out during production, and when danger occurs, the SIS system can be switched in and acts at the first time, so that the occurrence of injury is reduced and prevented.
Drawings
FIG. 1 is an overall architecture diagram of the present invention;
fig. 2 to 8 are schematic diagrams illustrating the specific logic control of the logic numerical control system according to the present invention;
FIG. 9 is a thermal desorption greenhouse fresh air system model.
Detailed Description
The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a sis (safety instrument system) safety protection system of direct thermal desorption soil remediation equipment, which is a safety instrument system based on a decentralized Control system, and is used for ensuring safe production, and the safety level is higher than dcs (distributed Control system), plc (programmable Logic controller), and specifically includes a sensing system, a Logic numerical Control system and an execution system, which are introduced below respectively.
The sensing system is independent sensing, can not be used with the sensor in DCS or PLC, and the precision grade is a little higher than the sensor in DCS or PLC, reaches when the automated production system appears unusually, can in time feed back measurement information, makes the SIS system intervene and operate production in time, reduces the possibility of occurence of failure. The common types of meters consist of pressure, temperature, regulating valves, metering pumps, leaking gas concentrations, emergency braking, on-site human-computer interaction screens, and the like.
A logic numerical control system in the SIS system is an independent system, a distributed control system is used as a basis, and the reliability and the safety of system operation are improved by utilizing an advanced, applicable and effective professional calculation method.
The execution mechanisms in the SIS system are engineers and operator stations, the computer stores and monitors collected data information, guides and predicts operation, prevents maintenance, diagnoses faults and the like, and corresponding operation is output according to an early warning output mode set after risk grade evaluation, so that safety protection is realized. Meanwhile, the manager can make the proposed decision scheme more scientific and reasonable through analyzing and comparing the monitoring data, so that the operation decision of the enterprise management layer is more scientific.
The basic idea of the utility model is to formulate the risk assessment report according to the current direct thermal desorption process and equipment design SIS basic model, and sort according to the priority. The whole process flow needs to be subdivided, and information of each control point and electrical equipment is marked, so that the process flow is complete and detailed, and the next process flow cannot be missed. Critical, important, medium, general and neglect by importance, catastrophic, major, general, mild and none by injury. And secondly, performing corresponding logic interlock design on points or associated actions with high risk levels in the evaluation report after analysis.
The system is designed and realized through the following main steps.
First, there are many risk assessment methods, and the commonly used LEC assessment method (proposed by american safety experts K.J greham and K.F kini) is a semi-qualitative and quantitative safety assessment method for risk sources in potentially dangerous work environments. The method uses the product of index values of three factors related to system risk to evaluate the casualty risk of the operator, L: likelihood, the possibility of an accident; e: exposure, how often personnel are exposed to hazardous environments; c: sequence, the possible consequences of an accident, simply expressed as: the larger the value of D (hazard) is, the greater the hazard is, and the safety measures need to be increased.
The evaluation method refers to an LEC method, but because of the particularity of an SIS system, the condition of E (occurrence frequency) is not allowed to occur, and the SIS system is to prevent the occurrence of the condition, so the evaluation method is mainly based on the aspects of production experience and safety, integrates personnel in the aspects of equipment, technology, safety, automatic control and the like, carries out analysis and evaluation in five grades from the importance degree of equipment and an electric instrument control point and the injury caused by the occurrence of an accident, is directly effective, and represents that the higher the score is after the scores are added, the higher the score is, the higher the risk is, and the evaluation is required to enter the SIS system for regulation and control. The evaluation of the automatic control system and the electrical system in the system is the analysis risk evaluation from the actual production.
The risk matrix calculation is a pseudo-quantitative analysis process because of the strong experience and subjectivity in the probability and severity theoretic process.
The division basis is according to: risk-likelihood severity, as follows:
a) likelihood classification
Table 1: likelihood classification
| Categories | Description of the invention |
| 1 | Rarely-unlikely to occur |
| 2 | May happen-it is possible that it does not happen more than once during the whole job |
| 3 | Likely-likely to occur multiple times during the entire job |
| 4 | Sometimes-at least once per year, or often during the entire operation |
b) Consequence classification
Table 2: consequence classification
c) Risk matrix
Table 3: risk matrix
d) Risk rating
Table 4: risk rating
e) Risk class classification
Table 5: risk class classification
With reference to the risk matrix principle, the SIS system parameters can be evaluated as follows.
Second, risk assessment 1 (automatic control system)
TABLE 6
Third, risk assessment 2 (electric system)
The risk assessment of the electrical system follows the safe production principle, and is classified into several grades of key, important, medium and general according to the key degree of the production position. According to the damage consequences grade produced in the emergency situation in the production process, the disaster grade, the great grade, the common grade and the slight grade are graded, finally, the comprehensive evaluation grade of the content is counted by using a risk matrix, and the wind rating grade is determined. As in the following table:
TABLE 7
And obtaining the priority of the risk level according to the risk assessment, and after screening and integration, using the priority as the content of the SIS system project. And after evaluation, corresponding interlocking information confirmation design is carried out on the high-level content in the SIS system project, and SIS action execution parameters and action states are set. As in the following table:
TABLE 8
Four, interlocking design
The method comprises the steps of determining related contents of the SIS system, and performing corresponding interlocking or emergency measure setting, namely presetting, wherein the setting principle is one-step in place, the set level is the highest authority, namely, the set level is higher than that of the automatic control system, and when the SIS system operates, the automatic control system is in an operation limiting state.
The logic of the autonomous SIS system is shown in fig. 2 to 8.
The electric SIS system monitors the running state of the equipment motor, non-action signals can be introduced by a DCS or a PLC system, an alarm is given in real time, the starting and stopping sequence is set, and the maintenance treatment is carried out in time. The production process of thermal desorption is automatically controlled, and technicians only need to monitor the state of alarm information under normal conditions, because the alarm (screen flash block + sound) is most direct and clear. When the alarm does not reach the SIS value, the alarm can be timely solved and processed. And when the solution cannot be processed and the SIS safety value is reached, the SIS system is started to forcibly execute the safety operation.
The alarm types are basically divided into two operating states and overload situations: 1. the running state of the monitoring equipment is normal or fault, and information can be fed back in time. 2. And monitoring the running current condition of the equipment so as to judge the running state of the equipment, wherein the current of the equipment is in a rated value interval during normal running. When abnormal states (such as shell jamming, idling and the like) occur to equipment, abnormal fluctuation occurs to current, the problem can be found in the first time through display and alarm, the field situation can be timely and effectively solved, equipment damage can be avoided, loss is reduced, and safety accidents are better avoided.
Table 9: alarm list
Several embodiments of the present invention are provided below to facilitate further understanding of the technical solutions.
Example 1
In the process of the soil remediation project, the soil after direct thermal desorption treatment can be separated from organic matters, chlorides and the like mixed in the soil, and the organic matters, the chlorides and the like are converted into gas to enter a tail gas treatment system. When the tail gas is treated by the secondary combustion, the temperature can reach above 850 ℃, so that the high-temperature gas enters a cloth bag for dust removal after heat exchange and quenching. In this process, if the temperature is not well controlled, the carcinogen dioxin is generated. Since the quenching system reduces the gas temperature from 800 ℃ to 250 ℃ after 2 seconds, the risk level is high in the evaluation of the quenching control point, and this is the content of the SIS system.
Example 2
In the process of thermal desorption of soil, fuel gas is used as a main raw material source, is flammable and explosive and can be regarded as a major hazard source. The thermal desorption machine kiln body is treated in a countercurrent mode in the soil remediation operation process, the material and airflow speed are opposite, the temperature in the kiln is 0-800 ℃, the discharging temperature is 0-550 ℃, equipment breaks down at high temperature, and the equipment is easy to explode or return to the kiln when not properly treated. As the main equipment of the soil remediation project, the kiln body has the advantages of complex manufacturing process, long period and high value. If a high-temperature explosion or the like occurs, irreparable damage is caused to personnel and units, so that the evaluation score is high in risk evaluation, and the related items are written as the content of the SIS system.
Example 3
In the process of the soil remediation project, the direct thermal desorption soil is subjected to moisture content and screening treatment in the thermal desorption greenhouse, and the operation is finished in the greenhouse by a driver operating the aluDou device. Because of the personnel operation, the circulating air system is required to be installed in the shed. The concrete model is shown in figure 9.
The operation state of the thermal desorption fan is put in because fresh air enters, the concentration of mixed gas in the shed is reduced, and the injury to personnel is reduced. If the fan stops running under the unknown condition, people in the shed still carry out screening operation, and symptoms such as dizziness, cough and the like are easy to cause for a long time. Meanwhile, according to the requirement of environmental protection on-site inspection: the operation in the shed is started when soil exists in the shed, and the operation in the shed is started when the soil exists in the shed, so the operation state of the fan is particularly important. Therefore, the evaluation score is high in risk evaluation, and the fan operation state early warning item is written as the content of the SIS system.
Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope.
Claims (7)
1. The utility model provides a direct thermal desorption soil repair equipment's SIS safety protection system which characterized in that: the system comprises a sensing system, a logic numerical control system and an execution system, wherein the sensing system is used for detecting the operating parameters of the automatic production system in real time and sending the operating parameters to the logic numerical control system; the logic numerical control system compares the operating parameters detected by the sensing system with various threshold values, performs logic operation and outputs a control instruction to the actuating mechanism; and the executing mechanism automatically or indicates manual execution of corresponding actions according to the control instruction of the logic numerical control system.
2. The SIS safety protection system for direct thermal desorption soil remediation devices of claim 1 further comprising: the sensing system comprises a first pressure sensor for detecting the pressure of the induced draft fan, a second pressure sensor for detecting the pressure of the combustion fan, a third pressure sensor for detecting the pressure of the kiln body and a fourth pressure sensor for detecting the pressure of the air, the corresponding logic numerical control system comprises a first judging circuit and a first logic gate circuit, and the first logic gate circuit comprises a first OR gate with five inputs and a first AND gate with two inputs; the first judgment circuit judges the relation between the pressure of the induced draft fan, the pressure of the combustion fan, the pressure of the kiln body and the air pressure and respective thresholds, and respectively inputs high levels to the first input end to the fourth input end of the first OR gate when the pressure of the induced draft fan is lower than the threshold, the pressure of the combustion fan is lower than the threshold, the pressure of the kiln body is higher than the threshold and the air pressure is lower than the threshold, otherwise, inputs low levels, and inputs high levels to the fifth input end of the first OR gate when a flameout signal exists; the output end of the first OR gate is connected with the first input end of the first AND gate, the second input end of the first AND gate is connected with the confirmation signal which is purged for a specified time, and the output end of the first AND gate is connected with the reignition signal.
3. The SIS safety protection system for direct thermal desorption soil remediation devices of claim 1 further comprising: the sensing system comprises a fifth pressure sensor for detecting the pressure of the induced draft fan, a sixth pressure sensor for detecting the pressure of the combustion-supporting fan, a seventh pressure sensor for detecting the pressure of the secondary combustion chamber and an eighth pressure sensor for detecting the pressure of the air, and the corresponding logic numerical control system comprises a second judgment circuit and a second logic gate circuit, wherein the second logic gate circuit comprises a second OR gate with five inputs and a second AND gate with two inputs; the second judgment circuit judges the relationship between the pressure of the induced draft fan, the pressure of the combustion-supporting fan of the secondary combustion engine, the pressure of the secondary combustion chamber and the air pressure and respective threshold values, and respectively inputs high level to the first to fourth input ends of the second OR gate when the pressure of the induced draft fan is lower than the threshold value, the pressure of the combustion-supporting fan of the secondary combustion engine is lower than the threshold value, the pressure of the secondary combustion chamber is higher than the threshold value and the air pressure is lower than the threshold value, otherwise, the low level is input, and the second judgment circuit also inputs high level to the fifth input end of the second; the output end of the second OR gate is connected with the first input end of the second AND gate, the second input end of the second AND gate is connected with the confirmation signal which is purged for the specified time, and the output end of the second AND gate is connected with the reignition signal.
4. The SIS safety protection system for direct thermal desorption soil remediation devices of claim 1 further comprising: the sensing system comprises a first temperature sensor for detecting the outlet temperature of the quenching tower and a liquid level sensor for detecting the liquid level of a water tank of the quenching tower, the corresponding logic numerical control system comprises a third judging circuit and a third logic gate circuit, and the third logic gate circuit comprises a third OR gate with two inputs and a third AND gate with one input; and the third judgment circuit respectively inputs high level to the first input end and the second input end of the third OR gate when judging that the outlet temperature of the quenching tower is higher than the threshold value and the liquid level of the water tank of the quenching tower is lower than the threshold value, otherwise, the low level is input, the output end of the third OR gate is connected with an alarm signal and the input end of a third AND gate, and the output end of the third AND gate is connected with a switching pump/inspection water tank liquid level signal.
5. The SIS safety protection system for direct thermal desorption soil remediation devices of claim 1 further comprising: the sensing system comprises a ninth pressure sensor for detecting the pressure of the combustion chamber, and the corresponding logic numerical control system comprises a fourth judging circuit and a fourth logic gate circuit, wherein the fourth logic gate circuit comprises an input fourth AND gate; the fourth judgment circuit judges the relation between the pressure of the second combustion chamber and the threshold value, and inputs a high level to the input end of the fourth AND gate when the pressure of the second combustion chamber is higher than the threshold value, otherwise, inputs a low level; the output end of the fourth AND gate is connected with a pressure relief window opening signal to control the pressure relief window to be automatically opened.
6. The SIS safety protection system for direct thermal desorption soil remediation devices of claim 1 further comprising: the sensing system comprises a sensor for detecting whether the thermal desorption machine or the secondary fuel is flamed out, the corresponding logic numerical control system comprises a fifth judging circuit and a fifth logic gate circuit, and the fifth logic gate circuit comprises a first NOT gate; the fifth judgment circuit judges that high level is input to the first NOT gate in the thermal desorption machine or the second NOT gate, and otherwise, low level is input; the output end of the first NOT gate is connected with a stop signal of the combustion-supporting fan/the secondary combustion-supporting fan of the thermal desorption machine.
7. The SIS safety protection system for direct thermal desorption soil remediation devices of claim 1 further comprising: the sensing system comprises a second temperature sensor for detecting the temperature of the bag-type dust removal inlet, the corresponding logic numerical control system comprises a sixth judging circuit and a sixth logic gate circuit, and the sixth logic gate circuit comprises a fourth OR gate with two inputs and a fifth AND gate with one input; the sixth judgment circuit judges whether the temperature of the bag dust removal inlet is in a threshold range, and respectively inputs high level to the first input end to the second input end of the fourth OR gate when the temperature is higher than the highest value of the threshold range or lower than the lowest value of the threshold range, otherwise, inputs low level; the output end of the sixth OR gate is connected with the alarm signal and the input end of the fifth AND gate, and the output end of the fifth AND gate is connected with the bypass valve opening signal.
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Address after: 255071 Room 501, Baofeng building, No.18, Baofeng Road, Zhangdian District, Zibo City, Shandong Province Patentee after: Shandong Dacheng environmental remediation Co.,Ltd. Patentee after: Sinochem environmental remediation (Shanghai) Co.,Ltd. Patentee after: SINOCHEM ENVIRONMENTAL HOLDINGS Ltd. Address before: 255071 Room 501, Baofeng building, No.18, Baofeng Road, Zhangdian District, Zibo City, Shandong Province Patentee before: Shandong Dacheng environmental remediation Co.,Ltd. Patentee before: SHANGHAI SHENGLONG ENVIRONMENT REMEDIATION TECHNOLOGIES Co.,Ltd. Patentee before: SINOCHEM ENVIRONMENTAL HOLDINGS Ltd. |
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