CN217031211U - Sludge combustible gas hot-blast stove ignition control system - Google Patents
Sludge combustible gas hot-blast stove ignition control system Download PDFInfo
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- CN217031211U CN217031211U CN202220625477.9U CN202220625477U CN217031211U CN 217031211 U CN217031211 U CN 217031211U CN 202220625477 U CN202220625477 U CN 202220625477U CN 217031211 U CN217031211 U CN 217031211U
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Abstract
The utility model relates to an ignition control system of a sludge combustible gas hot blast stove, which comprises a control cabinet, a hot blast stove, a combustion-supporting system, a pyrolysis gas system, a natural gas system, an ignition system and an air compression station system, wherein the hot blast stove, the combustion-supporting system, the pyrolysis gas system, the natural gas system and the ignition system are respectively connected with the control cabinet; the combustion-supporting system comprises a combustion-supporting fan and a combustion-supporting air pipe; the cracking gas system comprises a cracking gas source, a cracking pipeline and a cracking diffusion pipeline; the natural gas system comprises a natural gas source, a natural gas main pipe, a natural gas branch pipe, a first diffusion pipe and a second diffusion pipe, wherein the natural gas main pipe is communicated with the natural gas source and the pyrolysis gas mixer; the natural gas main pipe is communicated with the natural gas branch pipe, and the natural gas branch pipe is communicated with the igniter; the ignition system comprises an ignition fan and an ignition pipeline for communicating the ignition fan and the hot blast stove; and the air compression station system is communicated with the hot blast stove. The utility model adopts different measures to realize the successful ignition and the safety guarantee of the sludge combustible gas.
Description
Technical Field
The utility model relates to the technical field of municipal sludge pyrolysis and gasification, in particular to an ignition control system of a sludge combustible gas hot air furnace.
Background
The sludge is a solid sediment substance generated in the sewage treatment process, and the contained pollutants generally have higher heat values, but the heat values cannot be utilized due to the existence of a large amount of moisture.
The sludge pyrolysis gasification technology is a technology which realizes large-scale reduction, stabilization, harmlessness and recycling of sludge on the premise of no odor and no pollution. The thermal efficiency of the pyrolysis gasification technology is high, and organic matters are pyrolyzed into combustible gases such as carbon monoxide, hydrogen, hydrocarbons and the like under the condition of high temperature and oxygen deficiency.
Due to the complex sludge pyrolysis reaction process, the components of the generated combustible gas are difficult to effectively control, the heat value is unstable, and the unstable factors in the ignition process are more. In order to ensure the ignition stability, high-calorific-value gas is used as an ignition source, and combustible gas is introduced for ignition after the temperature of the hot blast stove is raised to be higher than 600 ℃, which is also the main mode for igniting low-calorific-value gas at present.
At present, the traditional ignition mode of low-calorific-value gas has certain requirements on the components, pressure and flow of combustible gas, and the sludge combustible gas has complex reaction and is difficult to ensure that the indexes are stable all the time, so that more emergencies possibly occur during ignition, such as: the ignition control system of the sludge combustible gas hot blast stove adopts different measures to ensure the success and the safety of ignition in order to deal with the situations, such as the pressure fluctuation, the component fluctuation, the heat value fluctuation and the like of the combustible gas.
Disclosure of Invention
The utility model provides an ignition control system of a sludge combustible gas hot air furnace, aiming at solving the problem that the traditional ignition mode of low-calorific-value gas is not suitable for ignition of sludge combustible gas at present, and different measures are adopted to realize successful ignition and safety guarantee of the sludge combustible gas.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
an ignition control system of a sludge combustible gas hot air furnace comprises a control cabinet, and a hot air furnace, a combustion-supporting system, a pyrolysis gas system, a natural gas system, an ignition system and an air compression station system which are respectively connected with the control cabinet, wherein the hot air furnace comprises a furnace body, a combustion-supporting air inlet, a pyrolysis gas inlet, a compressed air inlet, an igniter and an ignition gun;
the combustion-supporting system comprises a combustion-supporting fan and a combustion-supporting air pipe communicated with the combustion-supporting fan and a combustion-supporting air inlet, wherein the combustion-supporting air pipe is sequentially provided with an HV-A1 manual regulating valve, a PG240301 pressure gauge, a PT240301 pressure transmitter, an FV240301 pneumatic regulating valve and an HV-A2 manual regulating valve;
the cracking gas system comprises a cracking gas source and a cracking pipeline connected with the cracking gas source and a cracking gas inlet, wherein the cracking pipeline is sequentially provided with an HV-G1 manual regulating valve, a PG240302 pressure gauge, a PT240302 pressure transmitter, a PV240302 pneumatic regulating valve, an XV240301 pneumatic switching valve, a PG240303 pressure gauge, an HV-G2 manual regulating valve, a cracking gas mixer, an HV-G3 manual regulating valve, a PT240303 pressure transmitter, an XV240302 pneumatic switching valve, an HV240301 pneumatic regulating valve and an HV-G4 manual regulating valve;
a cracking and diffusing pipeline is communicated with a cracking pipeline between the HV240301 pneumatic regulating valve and the HV-G4 manual regulating valve, and the cracking and diffusing pipeline is sequentially provided with an HV-G5 manual diffusing valve and an HV-G6 manual diffusing valve;
the natural gas system comprises a natural gas source, a natural gas main pipe, a natural gas branch pipe, a first diffusion pipe and a second diffusion pipe, wherein the natural gas main pipe is communicated with the natural gas source and the pyrolysis gas mixer;
the natural gas main pipe is sequentially provided with an HV-L1 manual regulating valve, a PG240305 pressure gauge, an HV-L2 manual regulating valve, a PCV240301 natural gas pressure reducing valve, a PG240306 pressure gauge, an XV240304 main pipe electromagnetic valve, a PT240304 pressure transmitter, an XV240303 main pipe electromagnetic valve, a TV240301 pneumatic regulating valve and an HV-L3 manual regulating valve;
the natural gas branch pipe is communicated with a natural gas main pipe between the PG240305 pressure meter and the HV-L2 manual regulating valve and is communicated with an igniter, and the natural gas branch pipe is sequentially provided with an HV-L4 manual regulating valve, a PCV240302 natural gas pressure reducing valve, a PG240308 pressure meter, an SV240302 branch pipe electromagnetic valve and an HV-L6 manual regulating valve;
the natural gas main pipe between the TV240301 pneumatic regulating valve and the HV-L3 manual regulating valve is communicated with the first bleeding pipe, and the HV-L8 manual bleeding valve is arranged on the first bleeding pipe; the natural gas branch pipe between the SV240302 branch pipe electromagnetic valve and the HV-L6 manual regulating valve is communicated with a second bleeding pipe, and the second bleeding pipe is provided with an HV-L7 manual bleeding valve;
the ignition system comprises an ignition fan and an ignition pipeline communicated with the ignition fan and the igniter, and the ignition pipeline is sequentially provided with a PG240309 pressure gauge, an HV-A3 manual regulating valve and an HV-A4 manual regulating valve;
the air compression station system is communicated with the compressed air inlet and is also communicated with each pneumatic valve to provide a power source.
Further, a BE-602UV probe is arranged on the cracking gas inlet, and the ignition gun comprises an IT-601 ignition transformer, an IP-601 ignition electrode and a BE-601UV probe.
Further, the HV-A1 manual regulating valve, the PG240301 pressure gauge, the PT240301 pressure transmitter, the FV240301 pneumatic regulating valve and the HV-A2 manual regulating valve are sequentially arranged from the combustion fan to the combustion air inlet.
Further, the HV-G1 manual regulating valve, the PG240302 pressure gauge, the PT240302 pressure transmitter, the PV240302 pneumatic regulating valve, the XV240301 pneumatic switch valve, the PG240303 pressure gauge, the HV-G2 manual regulating valve, the pyrolysis gas mixer, the HV-G3 manual regulating valve, the PT240303 pressure transmitter, the XV240302 pneumatic switch valve, the HV240301 pneumatic regulating valve and the HV-G4 manual regulating valve are sequentially arranged from the pyrolysis gas source to the pyrolysis gas inlet.
Further, the HV-L1 manual regulating valve, the PG240305 pressure gauge, the HV-L2 manual regulating valve, the PCV240301 natural gas pressure reducing valve, the PG240306 pressure gauge, the XV240304 main pipe electromagnetic valve, the PT240304 pressure transmitter, the XV240303 main pipe electromagnetic valve, the TV240301 pneumatic regulating valve and the HV-L3 manual regulating valve are sequentially arranged from a natural gas source to the pyrolysis gas mixer;
the HV-L4 manual regulating valve, the PCV240302 natural gas pressure reducing valve, the PG240308 pressure gauge, the SV240302 branch pipe electromagnetic valve and the HV-L6 manual regulating valve are sequentially arranged along the natural gas flow direction;
and the tail ends of the first diffusing pipe and the second diffusing pipe are communicated and then are merged into the cracking diffusing pipeline.
Further, the PG240309 pressure gauge, the HV-A3 manual regulating valve and the HV-A4 manual regulating valve are sequentially arranged from the ignition fan to the igniter.
Further, the air compression station system includes that the air feed of air compression station and intercommunication air compression station and compressed air entry is responsible for, the air feed is responsible for and is provided with HV-C1 manual regulation valve and PG240304 manometer in proper order, and the intercommunication has a plurality of air feed branch pipes on the air feed is responsible for, and a plurality of air feed branch pipes communicate with PV240302 pneumatic control valve, XV240301 pneumatic switch valve, XV240302 pneumatic switch valve, HV240301 pneumatic control valve, FV240301 pneumatic control valve and TV240301 pneumatic control valve respectively.
Further, an HV-C2 manual regulating valve and an HV-C3 manual regulating valve are further arranged on the air supply main pipe, and the HV-C1 manual regulating valve, the PG240304 pressure gauge, the HV-C2 manual regulating valve and the HV-C3 manual regulating valve are sequentially arranged from the air compression station to the compressed air inlet;
the main gas supply pipe between the PG240304 pressure gauge and the HV-C2 manual regulating valve is communicated with the gas supply branch pipes, and the plurality of gas supply branch pipes are respectively provided with a manual valve to control the on-off.
Through the technical scheme, the utility model has the beneficial effects that:
the utility model has reasonable structural design, determines the condition meeting the ignition of the hot blast stove according to the characteristics of the sludge combustible gas and carries out ignition preparation before ignition. Aiming at the fluctuation of the components and the calorific value of the sludge combustible gas, the temperature of the ignition furnace is ensured by controlling the amount of natural gas during ignition. The quantity of the sludge combustible gas is controlled according to the fluctuation of the pressure and the flow of the sludge combustible gas, so that the gas pressure and the flow meet the ignition requirement during ignition. The furnace temperature, the sludge combustible gas quantity, the flame and other indexes during ignition are monitored in real time through instrument equipment, and the ignition process is stopped even if abnormality occurs, so that the safety is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a sludge combustible gas hot blast stove ignition control system according to the utility model.
FIG. 2 is a schematic view of a hot blast stove of the sludge combustible gas hot blast stove ignition control system of the present invention.
FIG. 3 is a schematic view of a combustion-supporting system of the sludge combustible gas hot blast stove ignition control system of the utility model.
FIG. 4 is a schematic diagram of a pyrolysis gas system of the ignition control system of the sludge combustible gas hot blast stove.
FIG. 5 is a schematic view of a natural gas system of the sludge combustible gas hot blast stove ignition control system of the present invention.
FIG. 6 is a schematic view of an ignition system of the sludge combustible gas hot blast stove ignition control system.
FIG. 7 is a schematic view of an air compression station system of the sludge combustible gas hot blast stove ignition control system of the utility model.
FIG. 8 is a flow chart of the control logic of step 1 in the embodiment of the ignition control system of the sludge combustible gas hot blast stove.
FIG. 9 is a flow chart of control logic of step 2 in an embodiment of the sludge combustible gas hot blast stove ignition control system of the utility model.
FIG. 10 is a flowchart of the control logic of step 3 in the embodiment of the sludge combustible gas hot blast stove ignition control system of the utility model.
The reference numbers in the figures are: 1 is a furnace body, 2 is a combustion-supporting air inlet, 3 is a pyrolysis gas inlet, 4 is a compressed air inlet, 5 is an igniter, 6 is an ignition gun, 601 is an IT-601 ignition transformer, 602 is an IP-601 ignition electrode, 603 is a BE-601UV probe, 7 is a combustion-supporting fan, 8 is a combustion-supporting air pipe, 9 is an HV-A1 manual regulating valve, 10 is a PG240301 pressure gauge, 11 is a PT240301 pressure transmitter, 12 is an FV240301 pneumatic regulating valve, 13 is an HV-A2 manual regulating valve, 14 is a pyrolysis gas source, 15 is a pyrolysis pipeline, 16 is an HV-G1 manual regulating valve, 17 is a PG240302 pressure gauge, 18 is a PT240302 pressure transmitter, 19 is a 240PV 302 pneumatic regulating valve, 20 is an XV240301 pneumatic switch valve, 21 is PG240303 pressure gauge, 22 is an HV-G2 manual regulating valve, 23 is a pyrolysis gas mixer, 24 is an HV-G3 manual regulating valve, 25 is a PT240303 pressure transmitter, 26 is an XV240303 pneumatic switch valve, 27 is HV240301 pneumatic control valve, 28 is HV-G4 manual control valve, 29 is cracking relief line, 30 is HV-G5 manual relief valve, 31 is HV-G6 manual relief valve, 32 is natural gas source, 33 is natural gas main pipe, 34 is natural gas branch pipe, 35 is relief pipe one, 36 is relief pipe two, 37 is HV-L1 manual control valve, 38 is PG240305 pressure gauge, 39 is HV-L2 manual control valve, 40 is PCV240301 natural gas pressure reducing valve, 41 is PG 306 pressure gauge, 42 is XV240304 solenoid valve, 43 is PT240304 pressure transmitter, 44 is XV240302 main pipe solenoid valve, 45 is TV240301 pneumatic control valve, 46 is HV-L3 manual control valve 303, 47 is HV-L4 manual control valve, 48 is PCV240302 natural gas pressure reducing valve, 49 is PG240308 main pipe pressure gauge 50 is SV240302 pressure gauge branch pipe, 51 is HV-L6 manual control valve, 52 is HV-L8 manual relief valve, 53 is an HV-L7 manual diffusing valve, 54 is an ignition fan, 55 is an ignition pipeline, 56 is a PG240309 pressure gauge, 58 is an HV-A3 manual adjusting valve, 59 is an HV-A4 manual adjusting valve, 60 is a BE-602UV probe, 61 is an air pressure station, 62 is an air supply main pipe, 63 is an HV-C1 manual adjusting valve, 64 is a PG240304 pressure gauge, 65 is a TT240301 thermocouple, and 66 is a TIC240301 temperature display table.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings in which:
as shown in fig. 1 to 7, the ignition control system for the sludge combustible gas hot air furnace comprises a control cabinet, and a hot air furnace, a combustion-supporting system, a pyrolysis gas system, a natural gas system, an ignition system and an air compression station system which are respectively connected with the control cabinet, wherein the control cabinet is used for respectively controlling the hot air furnace, the combustion-supporting system, the pyrolysis gas system, the natural gas system and the ignition system.
The hot blast stove comprises a stove body 1, a combustion-supporting air inlet 2, a pyrolysis gas inlet 3, a compressed air inlet 4, an igniter 5 and an ignition gun 6.
The furnace body 1 is provided with a TT240301 thermocouple 65 for detecting the temperature of a hearth in the hot blast furnace, the detection range is 0-1300 ℃, the furnace body 1 is also provided with a TIC240301 temperature display table 66 for displaying the temperature of the hearth in real time, the TT240301 thermocouple 65 and the TIC240301 temperature display table 66 are both connected with a temperature controller, and the temperature controller is arranged in a control cabinet.
Air and natural gas are required to BE introduced into the igniter 5, the BE-602UV probe 60 is arranged on the cracking gas inlet 3, and the ignition gun 6 comprises an IT-601 ignition transformer 601, an IP-601 ignition electrode 602 and a BE-601UV probe 603. The UV probe is used for detecting whether a flame is generated, and the parameters of the IT-601 ignition transformer 601 are 220V and 50 Hz.
The combustion-supporting system comprises a combustion-supporting fan 7 and a combustion-supporting air pipe 8 communicated with the combustion-supporting fan 7 and a combustion-supporting air inlet 2, wherein an HV-A1 manual regulating valve 9, a PG240301 pressure gauge 10, a PT240301 pressure transmitter 11, an FV240301 pneumatic regulating valve 12 and an HV-A2 manual regulating valve 13 are sequentially arranged on the combustion-supporting air pipe 8.
The HV-A1 manual regulating valve 9, the PG240301 pressure gauge 10, the PT240301 pressure transmitter 11, the FV240301 pneumatic regulating valve 12 and the HV-A2 manual regulating valve 13 are sequentially arranged from the self-igniting fan 7 to the combustion air inlet 2.
The HV-A1 manual regulating valve 9 and the HV-A2 manual regulating valve 13 are DN200 manual butterfly valves and are used for regulating the opening degree of a combustion air valve. The PG240301 pressure gauge 10 displays the pressure range of 0-16Kpa, and can display the combustion air pressure on site. PT240301 pressure transmitter 11 has parameters 0-16Kpa, DC24V, and is used to sense pipeline pressure and transmit a pressure signal to the control cabinet.
The cracking gas system comprises a cracking gas source 14 and a cracking pipeline 15 connected with the cracking gas source 14 and a cracking gas inlet 3, wherein an HV-G1 manual regulating valve 16, a PG240302 pressure gauge 17, a PT240302 pressure transmitter 18, a PV240302 pneumatic regulating valve 19, an XV240301 pneumatic switch valve 20, a PG240303 pressure gauge 21, an HV-G2 manual regulating valve 22, a cracking gas mixer 23, an HV-G3 manual regulating valve 24, a PT240303 pressure transmitter 25, an XV240302 pneumatic switch valve 26, an HV240301 pneumatic regulating valve 27 and an HV-G4 manual regulating valve 28 are sequentially arranged on the cracking pipeline 15.
The HV-G1 manual regulating valve 16, the PG240302 pressure gauge 17, the PT240302 pressure transmitter 18, the PV240302 pneumatic regulating valve 19, the XV240301 pneumatic switch valve 20, the PG240303 pressure gauge 21, the HV-G2 manual regulating valve 22, the pyrolysis gas mixer 23, the HV-G3 manual regulating valve 24, the PT240303 pressure transmitter 25, the XV240302 pneumatic switch valve 26, the HV240301 pneumatic regulating valve 27 and the HV-G4 manual regulating valve 28 are sequentially arranged from the pyrolysis gas source 14 to the pyrolysis gas inlet 3.
The HV-G1 manual regulating valve 16, the HV-G2 manual regulating valve 22, the HV-G3 manual regulating valve 24 and the HV-G4 manual regulating valve 28 are DN250 manual turbine butterfly valves and are used for regulating the opening degree of the cracking air valve. The PG240302 pressure gauge 17 displays a pressure range of 0-25Kpa, and can display the pressure of the pyrolysis gas on site. The PT240302 pressure transmitter 18 has parameters of 0-25Kpa and DC24V, and is used for detecting the pressure of the cracking pipeline 15 and transmitting a pressure signal to the control cabinet, so that the opening degree of the PV240302 pneumatic regulating valve 19 is controlled; the PT240302 pressure transmitter 18 is provided with low-pressure protection and is safely interlocked with the XV240301 pneumatic switch valve 20, and meanwhile, the PT240301 pressure transmitter 11 of the combustion-supporting system is provided with low-pressure protection and is also safely interlocked with the pyrolysis gas XV240301 pneumatic switch valve 20.
The PV240302 pneumatic regulating valve 19 has parameters of DC24V and 4-20ma, and can regulate the cracking gas inlet pressure by combining the PT240302 pressure transmitter 18 and the PT240303 pressure transmitter 25. The XV240301 pneumatic switch valve 20 parameters are AC220V, 50Hz, it is set with low pressure protection, it is safety interlocked with PT240302 and PT240301 pressure transmitter 11, at the same time it combines with XV240302 pneumatic switch valve 26 PT240303 pressure transmitter 25 to achieve valve leak detection. The PG240303 pressure gauge 21 displays the pressure range of 0-25Kpa, and can display the mixed gas pressure, namely the mixed pressure of pyrolysis gas and natural gas on site. The cracked gas mixer 23 is used for thorough mixing of the cracked gas and the natural gas. The PT240303 pressure transmitter 25 has parameters of 0-25Kpa and DC24V, and is used for detecting the pressure of the cracking pipeline 15 and transmitting a pressure signal to the control cabinet, so that the opening degree of the PV240302 pneumatic regulating valve 19 is controlled; PT240303 pressure transmitter 25 achieves valve leak detection with XV240301 and XV240302 pneumatic switch valves 26.
The XV240302 pneumatic switch valve 26 parameters are AC220V, 50Hz, is safely interlocked with the BE-602UV probe 60, and is combined with the XV240301 pneumatic switch valve 20 and the PT240303 pressure transmitter 25 to realize valve leakage detection. The HV240301 pneumatic control valve 27 has parameters DC24V, 4-20ma, and its switch can be operated by the control cabinet and is normally open.
A cracking and releasing pipeline 29 is communicated with the cracking pipeline 15 between the HV240301 pneumatic regulating valve 27 and the HV-G4 manual regulating valve 28, and the cracking and releasing pipeline 29 is sequentially provided with an HV-G5 manual releasing valve 30 and an HV-G6 manual releasing valve 31. The HV-G5 manual bleeding valve 30 and the HV-G6 manual bleeding valve 31 are DN40 manual butterfly valves and are used for bleeding pyrolysis gas during blowing-in and blowing-out.
The natural gas system comprises a natural gas source 32, a natural gas main pipe 33 communicated with the natural gas source 32 and the pyrolysis gas mixer 23, a natural gas branch pipe 34, a first diffusion pipe 35 and a second diffusion pipe 36.
The natural gas main pipe 33 is sequentially provided with an HV-L1 manual regulating valve 37, a PG240305 pressure gauge 38, an HV-L2 manual regulating valve 39, a PCV240301 natural gas pressure reducing valve 40, a PG240306 pressure gauge 41, an XV240304 main pipe electromagnetic valve 42, a PT240304 pressure transmitter 43, an XV240303 main pipe electromagnetic valve 44, a TV240301 pneumatic regulating valve 45 and an HV-L3 manual regulating valve 46.
The HV-L1 manual regulating valve 37, the PG240305 pressure gauge 38, the HV-L2 manual regulating valve 39, the PCV240301 natural gas pressure reducing valve 40, the PG240306 pressure gauge 41, the XV240304 main pipe electromagnetic valve 42, the PT240304 pressure transmitter 43, the XV240303 main pipe electromagnetic valve 44, the TV240301 pneumatic regulating valve 45 and the HV-L3 manual regulating valve 46 are sequentially arranged from the natural gas source 32 to the pyrolysis gas mixer 23.
The HV-L1 manual regulating valve 37, the HV-L2 manual regulating valve 39 and the HV-L3 manual regulating valve 46 are DN40 manual valves and are used for manually regulating the valve opening degree on the natural gas main pipe 33. The PG240305 pressure gauge 38 displays the pressure range of 0-1.6MPa, and can display the natural gas inflow pressure on site.
The PCV240301 natural gas relief valve 40 is used to relieve pressure in the natural gas main 33. The PG240306 pressure gauge 41 displays the pressure range of 0-25Kpa, and can display the pressure of the natural gas main pipe 33 after decompression on site. The XV240304 main pipe electromagnetic valve 42 parameters are AC220V, 50Hz, and the XV240303 main pipe electromagnetic valve 44 is combined with the PT240304 pressure transmitter 43 to achieve valve leakage detection.
The PT240304 pressure transmitter 43 has the parameters of 0-25Kpa and DC24V, a low-pressure protection is set, the pressure of the natural gas main pipe 33 is displayed, a pressure signal is transmitted to the control cabinet, and the PT240304 pressure transmitter 43 and the XV240303 main pipe electromagnetic valve 44 are in safety interlocking. The XV240303 main pipe electromagnetic valve 44 parameters are AC220V, 50Hz, and the XV240304 main pipe electromagnetic valve 42 is combined with the PT240304 pressure transmitter 43 to achieve valve leakage detection.
The parameters of the TV240301 pneumatic regulating valve 45 are DC24V and 4-20ma, and the TT240301 thermocouple 65 is combined to control the supplement amount of the natural gas according to the temperature in the hearth, namely the opening of the natural gas TV240301 pneumatic regulating valve 45 is controlled.
The natural gas branch pipe 34 is communicated with the natural gas main pipe 33 between the PG240305 pressure gauge 38 and the HV-L2 manual regulating valve 39, the natural gas branch pipe 34 is communicated with the igniter 5, and the HV-L4 manual regulating valve 47, the PCV240302 natural gas pressure reducing valve 48, the PG240308 pressure gauge 49, the SV240302 branch pipe electromagnetic valve 50 and the HV-L6 manual regulating valve 51 are sequentially arranged on the natural gas branch pipe 34.
The HV-L4 manual regulating valve 47, the PCV240302 natural gas pressure reducing valve 48, the PG240308 pressure gauge 49, the SV240302 branch pipe electromagnetic valve 50 and the HV-L6 manual regulating valve 51 are sequentially arranged along the natural gas flow direction.
The HV-L4 manual regulating valve 47 and the HV-L6 manual regulating valve 51 are DN15 manual valves and are used for manually regulating the opening degree of the valves on the natural gas branch pipe 34. PCV240302 natural gas relief valve 48 is used to relieve pressure in natural gas branch 34. PG240308 pressure gauge 49 shows the pressure range 0-25Kpa, and can display the pressure of natural gas branch pipe 34 after decompression on site. The SV240302 manifold solenoid valve 50 parameters are AC220V, 50Hz, and is safety interlocked with the BE-601UV probe 603.
The natural gas main pipe 33 between the TV240301 pneumatic regulating valve 45 and the HV-L3 manual regulating valve 46 is communicated with the first bleeding pipe 35, and the HV-L8 manual bleeding valve 52 is arranged on the first bleeding pipe 35; the natural gas branch pipe 34 between the SV240302 branch pipe electromagnetic valve 50 and the HV-L6 manual regulating valve 51 is communicated with the second bleeding pipe 36, and the HV-L7 manual bleeding valve 53 is arranged on the second bleeding pipe 36.
Specifically, the tail ends of the first diffusion pipe 35 and the second diffusion pipe 36 are communicated and then merged into the cracking diffusion pipeline 29. The HV-L7 manual diffusing valve 53 and the HV-L8 manual diffusing valve 52 are DN20 manual valves and are used for diffusing natural gas during blowing-in and blowing-out.
The ignition system comprises an ignition fan 54 and an ignition pipeline 55 which is communicated with the ignition fan 54 and an igniter 5, wherein a PG240309 pressure gauge 56, an HV-A3 manual regulating valve 58 and an HV-A4 manual regulating valve 59 are sequentially arranged on the ignition pipeline 55. The PG240309 pressure gauge 56, the HV-A3 manual regulating valve 58 and the HV-A4 manual regulating valve 59 are arranged in sequence from the ignition fan 54 to the igniter 5.
The PG240309 gauge 56 displays a pressure range of 0-25Kpa, and can display the ignition air pressure on site. The HV-A3 manual regulating valve 58 and the HV-A4 manual regulating valve 59 are DN25 manual valves and are used for manually regulating the opening degree of an ignition air valve.
The air compression station system is communicated with the compressed air inlet 4 and is also communicated with each pneumatic valve to provide a power source required by the pneumatic valve.
Specifically, the air compression station system comprises an air compression station 61 and an air supply main pipe 62 communicating the air compression station 61 and the compressed air inlet 4, wherein the air supply main pipe 62 is sequentially provided with an HV-C1 manual regulating valve 63 and a PG240304 pressure gauge 64. The HV-C1 manual regulating valve 63 is a DN25 manual valve; the PG240304 pressure gauge 64 displays the pressure range of 0-1.6Mpa, and can display the pressure of the compressed air in situ.
The air supply main pipe 62 is also provided with an HV-C2 manual regulating valve and an HV-C3 manual regulating valve, and the HV-C1 manual regulating valve 63, the PG240304 pressure gauge 64, the HV-C2 manual regulating valve and the HV-C3 manual regulating valve are sequentially arranged from the air compression station 61 to the compressed air inlet 4.
The gas supply main pipe 62 is communicated with a plurality of gas supply branch pipes, the gas supply main pipe 62 between the PG240304 pressure gauge 64 and the HV-C2 manual regulating valve is communicated with the gas supply branch pipes, and the plurality of gas supply branch pipes are respectively provided with a manual valve to control the on-off. The plurality of air supply branch pipes are respectively communicated with the PV240302 pneumatic regulating valve 19, the XV240301 pneumatic switching valve 20, the XV240302 pneumatic switching valve 26, the HV240301 pneumatic regulating valve 27, the FV240301 pneumatic regulating valve 12 and the TV240301 pneumatic regulating valve 45.
As shown in fig. 8 to 10, the control steps of the control system for starting the ignition of the hot blast stove are as follows:
step 1.1, testing of an air compression station 61, combustion supporting and ignition systems:
step 1.1a, testing a system of an air compression station: the air compression station 61 is started, the HV-C1 manual regulating valve 63 is opened, and the PG240304 pressure gauge 64 is observed on site to be normal.
Step 1.1b, testing a combustion-supporting system: manually opening HV-A1 manual regulating valve 9-60%, opening HV-A2 manual regulating valve 13-60%; and (3) manually starting a combustion fan 7 by the control cabinet, adjusting the frequency to 40Hz, checking the display pressure and the display range of 3-4Kpa of a PG240301 pressure gauge 10 on site, and closing the control cabinet after the control cabinet is normal.
Step 1.1c, testing an ignition system: manually opening HV-A3 manual regulating valve 58 to 100%, opening HV-A4 manual regulating valve 59 to 20%; the control cabinet manually starts the ignition fan 54 and checks the operation condition, checks the pressure displayed by the PG240309 pressure gauge 56 and the display range of 9-10Kpa on site, and closes after normal operation.
And 1.1d, completing the test and waiting for ignition.
Step 1.2, diffusing natural gas:
step 1.2a, manually open HV-L1 manual regulating valve 37, look at PG240305 pressure gauge 38 pressure on site, show as 0.1 MPa.
Step 1.2b, manually opening HV-L2 manual regulating valve 39, regulating main pipe PCV240301 natural gas pressure reducing valve 40, viewing PG240306 pressure gauge 41 pressure on site, shown as 5 Kpa.
Step 1.2c, manually open HV-L4 manual regulating valve 47, regulate branch PCV240302 natural gas pressure reducing valve 48, look at PG240308 pressure gauge 49 pressure on site, shown as 5 Kpa.
And 1.2d, manually opening a main pipe HV-L8 manual diffusing valve 52 and a branch pipe HV-L7 manual diffusing valve 53, confirming that a main pipe HV-L3 manual regulating valve 46 and a branch pipe HV-L6 manual regulating valve 51 are closed, and preparing for natural gas diffusing.
And 1.2e, manually opening an XV240303 main pipe electromagnetic valve 44 and an XV240304 main pipe electromagnetic valve 42 by the control cabinet, opening a TV240301 pneumatic adjusting valve 45-100%, manually opening a natural gas SV240302 branch pipe electromagnetic valve 50 by the control cabinet, and performing natural gas diffusion for 5 min.
Step 1.2f, after the diffusion is finished, closing all the manual diffusion valves opened in the step 1.2d, and closing all the electromagnetic valves and pneumatic regulating valves opened in the step 1.2 e; the main pipe HV-L3 is opened to adjust the valves 46 to 50% manually, and the branch pipe HV-L6 is opened to adjust the valves 51 to 20% manually.
And step 1.2g, completing natural gas diffusion and waiting for ignition.
Step 1.3, releasing pyrolysis gas:
step 1.3a, manually open HV-G1 manual regulating valve 16, look on site at PG240302 pressure gauge 17 pressure, shown as range 10-20 Kpa.
Step 1.3b, manually opening cracked gas HV-G2 manual regulating valve 22, HV-G3 manual regulating valve 24-50%, HV-G4 manual regulating valve 28-20%, and HV-G6 manual bleeding valve 31.
Meanwhile, the PT240302 pressure transmitter 18 presets a low-pressure protection value 2Kpa, and if the detected pressure is 3-4Kpa, the pressure is normal and meets the first ignition condition; if the detected pressure is lower than 2Kpa, an alarm is output, the reason is checked, and the alarm is automatically released after the pressure is normal.
Step 1.3c, manually opening cracked gas HV-G5 manual blow-off valve 30, confirming that HV-G4 manual regulating valve 28 is closed, ready for cracked gas blow-off.
And step 1.3d, manually opening a pyrolysis gas XV240301 pneumatic switch valve 20 and a pyrolysis gas XV240302 pneumatic switch valve 26 by the control cabinet, opening a pyrolysis gas PV240302 pneumatic regulating valve 19 and a pyrolysis gas HV240301 pneumatic regulating valve 27 to 100 percent, and performing pyrolysis gas diffusion for 5 min.
And step 1.3e, after the diffusion is finished, closing all the opened manual diffusion valves in the step 1.3c, closing all the opened pneumatic switch valves and pneumatic regulating valves in the step 1.3d, and opening the HV-G4 manual regulating valve 28-50%.
And step 1.3f, finishing the diffusion of the pyrolysis gas and waiting for ignition.
step 2.1, leakage detection of a natural gas system:
step 2.1a, preparing natural gas valve leak detection: automatically opening 27 to 50 percent of a pneumatic regulating valve of pyrolysis gas HV240301, automatically opening 26 percent of a pneumatic switching valve of pyrolysis gas XV240302, and automatically opening 45 to 20 percent of a pneumatic regulating valve of natural gas TV 240301.
Step 2.1b, natural gas valve leakage detection is carried out: the natural gas XV240303 main pipe electromagnetic valve 443s is automatically opened and then closed, and the PT240304 pressure transmitter 43 detects the pressure change 3s after the XV240303 main pipe electromagnetic valve 44 is closed.
Step 2.1c, when the natural gas XV240303 main pipe electromagnetic valve 44 is opened, the PT240304 pressure transmitter 43 detects no pressure, the leak detection is successful, and the next step is carried out; if the PT240304 pressure transmitter 43 detects pressure, the leakage detection fails and an alarm is output, meanwhile, the solenoid valve 44 of the main pipe of the XV240303 is closed, the reason is checked, and the step 2.1a is returned.
And 2.1d, detecting the leakage of the natural gas valve: the natural gas XV240304 main pipe electromagnetic valve 423s is automatically opened and then closed, and the PT240304 pressure transmitter 43 detects the pressure change 3s after the XV240304 main pipe electromagnetic valve 42 is closed.
Step 2.1e, when the natural gas XV240304 main pipe electromagnetic valve 42 is opened, the PT240304 pressure transmitter 43 detects no pressure, the leak detection is successful, and the next step is carried out; if the PT240304 pressure transmitter 43 detects pressure, a leakage detection failure alarm is output, meanwhile, the solenoid valve 42 of the main pipe of the XV240304 is closed, the reason is checked, and the step 2.1a is returned.
And 2.1f, after the leakage detection is successful, opening the electromagnetic valve 42 of the main pipe of the natural gas XV240304, and detecting the normal pressure of 5Kpa by the PT240304 pressure transmitter 43 to meet the third ignition condition.
Step 2.2, leak detection of a cracking gas system:
step 2.2a, preparing a cracking gas valve for leak detection: the cracked gas XV240302 pneumatic switch valve 26 is automatically closed and the cracked gas PV240302 pneumatic control valve 19 to 50% is opened.
Step 2.2b, leak detection of a cracking gas valve is carried out: the cracked gas XV240302 pneumatic switch valve 265s is automatically opened and then closed, and the PT240303 pressure transmitter 25 detects the pressure change of the cracked gas XV240302 pneumatic switch valve 26 after closing.
2.2c, when no pressure is detected by the PT240303 pressure transmitter 25 during the opening period of the cracked gas XV240302 pneumatic switch valve 26, the leak detection is passed, and the next step is carried out; if the PT240303 pressure transmitter 25 detects pressure, the leak detection fails and an alarm is output, and meanwhile, the XV240302 pneumatic switch valve 26 is closed, the reason is checked and the step 2.1a is returned.
And 2.2d, leak detection of a cracking gas valve is performed: the XV240301 pneumatic switch valve 205s is automatically opened and then closed, and the PT240303 pressure transmitter 25 detects the pressure change of the cracked gas XV240301 pneumatic switch valve 20 after being closed.
2.2e, when the pressure detected by the PT240303 pressure transmitter 25 is unchanged during the opening period of the cracked gas XV240301 pneumatic switch valve 20, the leak detection is passed, and the next step is carried out; if the PT240303 pressure transmitter 25 detects pressure, the leakage detection fails and an alarm is output, meanwhile, the XV240301 pneumatic switch valve 20 is closed, the reason is checked and the step 2.1a is returned.
And 2.2f, opening the XV240301 pneumatic switch valve 20 after the leak detection is passed, and meeting the fourth ignition condition.
Step 2.3, starting an ignition and combustion-supporting system:
and 2.3a, automatically starting the ignition fan 54, if no running signal is returned after 5s after starting, outputting an alarm program to stop, checking the reason, and returning to the step 2.3 a.
Step 2.3b, automatically starting a combustion-supporting fan 7, adjusting the frequency to 40Hz, automatically opening an FV240301 pneumatic control valve 12 to 20 percent, presetting a low-pressure protection value 2Kpa by a PT240301 pressure transmitter 11, and if the detected pressure is 3-4Kpa, ensuring the pressure to be normal and meeting a second ignition condition; if the detected pressure is lower than 2Kpa, the alarm program is output to stop, the reason is checked, and the step 2.3a is returned.
step 3.1, after the four ignition conditions are met, starting the pre-ignition purging: the FV240301 pneumatic control valve is automatically opened by 12 to 100 percent, and after purging is carried out for 180s, the valve is closed to 10 percent of ignition opening.
And 3.2, automatically starting an IT-601 ignition transformer 601 and an IP-601 ignition electrode 602 for discharging for 8s, automatically opening an SV240302 branch pipe electromagnetic valve 503s for ignition, and detecting flames by a BE-601UV probe 603.
If the BE-601UV probe 603 does not detect the flame, automatically closing the SV240302 branch pipe electromagnetic valve 50, repeating the ignition 1-2 times after the interval of 5s, and continuing the program after detecting the flame; the BE-601UV probe 603 still does not detect the flame, gives an alarm and automatically closes the SV240302 branch solenoid valve 50, checks the reason and returns to step 3.1.
When the BE-601UV probe 603 detects flame, the SV240302 branch pipe electromagnetic valve 50 is normally opened, the pyrolysis gas HV240301 pneumatic regulating valve 27 is automatically opened to 15%, the pyrolysis gas XV240302 pneumatic switching valve 2610s is automatically opened, and the BE-602UV probe 60 detects flame.
And 3.3, automatically closing the pneumatic switch valve 26 of the pyrolysis gas XV240302 and opening the pneumatic switch valve 2610s of the pyrolysis gas XV240302 after the interval of 15s when the BE-602UV probe 60 does not detect the flame, and continuing the program after detecting the flame.
The BE-602UV probe 60 detects flame, the pneumatic switch valve 26 of the pyrolysis gas XV240302 is normally opened, the pneumatic regulating valve 27 of the pyrolysis gas HV240301 is automatically opened to BE fully opened, then the manual mode is switched, ignition is successful, and an automatic control program is entered, wherein the automatic control program comprises furnace pressure control logic and furnace temperature control logic.
The above-described testing of the air compression station, the booster and the ignition system of the entire control procedure ensures that these functions work properly during the ignition process. The natural gas and cracked gas diffusion test can ensure that the diffusion system can normally realize the diffusion function when the ignition is abnormal. The leakage detection of natural gas and cracked gas is to ensure that the natural gas and cracked gas valve can normally realize the function of cutting off and prevent the combustible gas from leaking. Alarm and safety interlocking: and the leakage detection of natural gas and cracked gas does not pass, the ignition process is stopped, and the ignition instruction can be received again after the fault is eliminated. And when the combustion fan fails, the ignition process is stopped, and the ignition instruction can be received again after the failure is eliminated. The PT240301 pressure transmitter is lower than the set protection value, the ignition process is stopped, and the ignition instruction can be received again after the abnormity is eliminated. And when the 2 fire detectors, namely the BE-601UV probe and the BE-602UV probe, do not detect flames and continue for a certain time, prompting a fire-free alarm and trying to ignite again, and reporting a fire-free fault and stopping an ignition process if the flames cannot BE detected after trying for 1-2 times.
The above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the utility model, so that equivalent changes or modifications in the structure, features and principles described in the present invention should be included in the claims of the present invention.
Claims (8)
1. An ignition control system of a sludge combustible gas hot air furnace comprises a control cabinet, a hot air furnace, a combustion-supporting system, a pyrolysis gas system, a natural gas system, an ignition system and an air compression station system, wherein the hot air furnace, the combustion-supporting system, the pyrolysis gas system, the natural gas system and the ignition system are respectively connected with the control cabinet;
the combustion-supporting system comprises a combustion-supporting fan (7) and a combustion-supporting air pipe (8) communicated with the combustion-supporting fan (7) and a combustion-supporting air inlet (2), wherein the combustion-supporting air pipe (8) is sequentially provided with an HV-A1 manual regulating valve (9), a PG240301 pressure gauge (10), a PT240301 pressure transmitter (11), an FV240301 pneumatic regulating valve (12) and an HV-A2 manual regulating valve (13);
the cracking gas system comprises a cracking gas source (14) and a cracking pipeline (15) connected with the cracking gas source (14) and a cracking gas inlet (3), wherein the cracking pipeline (15) is sequentially provided with an HV-G1 manual regulating valve (16), a PG240302 pressure gauge (17), a PT240302 pressure transmitter (18), a PV240302 pneumatic regulating valve (19), an XV240301 pneumatic switch valve (20), a PG240303 pressure gauge (21), an HV-G2 manual regulating valve (22), a cracking gas mixer (23), an HV-G3 manual regulating valve (24), a PT240303 pressure transmitter (25), an XV240302 pneumatic switch valve (26), an HV240301 pneumatic regulating valve (27) and an HV-G4 manual regulating valve (28);
a cracking and releasing pipeline (29) is communicated with the cracking pipeline (15) between the HV240301 pneumatic regulating valve (27) and the HV-G4 manual regulating valve (28), and the cracking and releasing pipeline (29) is sequentially provided with an HV-G5 manual releasing valve (30) and an HV-G6 manual releasing valve (31);
the natural gas system comprises a natural gas source (32), a natural gas main pipe (33) communicated with the natural gas source (32) and the pyrolysis gas mixer (23), a natural gas branch pipe (34), a first diffusion pipe (35) and a second diffusion pipe (36);
an HV-L1 manual regulating valve (37), a PG240305 pressure gauge (38), an HV-L2 manual regulating valve (39), a PCV240301 natural gas pressure reducing valve (40), a PG240306 pressure gauge (41), an XV240304 main pipe electromagnetic valve (42), a PT240304 pressure transmitter (43), an XV240303 main pipe electromagnetic valve (44), a TV240301 pneumatic regulating valve (45) and an HV-L3 manual regulating valve (46) are sequentially arranged on the natural gas main pipe (33);
the natural gas branch pipe (34) is communicated with a natural gas main pipe (33) between the PG240305 pressure gauge (38) and the HV-L2 manual regulating valve (39), the natural gas branch pipe (34) is communicated with the igniter (5), and the natural gas branch pipe (34) is sequentially provided with an HV-L4 manual regulating valve (47), a PCV240302 natural gas pressure reducing valve (48), a PG240308 pressure gauge (49), an SV240302 branch pipe electromagnetic valve (50) and an HV-L6 manual regulating valve (51);
the natural gas main pipe (33) between the TV240301 pneumatic regulating valve (45) and the HV-L3 manual regulating valve (46) is communicated with the first bleeding pipe (35), and the HV-L8 manual bleeding valve (52) is arranged on the first bleeding pipe (35); the natural gas branch pipe (34) between the SV240302 branch pipe electromagnetic valve (50) and the HV-L6 manual regulating valve (51) is communicated with the second bleeding pipe (36), and the HV-L7 manual bleeding valve (53) is arranged on the second bleeding pipe (36);
the ignition system comprises an ignition fan (54) and an ignition pipeline (55) communicated with the ignition fan (54) and an igniter (5), wherein a PG240309 pressure gauge (56), an HV-A3 manual regulating valve (58) and an HV-A4 manual regulating valve (59) are sequentially arranged on the ignition pipeline (55);
the air compression station system is communicated with a compressed air inlet (4), and is also communicated with each pneumatic valve to provide a power source.
2. The ignition control system of the sludge combustible gas hot blast stove according to claim 1, characterized in that a BE-602UV probe (60) is provided on the pyrolysis gas inlet (3), and the ignition gun (6) comprises an IT-601 ignition transformer (601), an IP-601 ignition electrode (602) and a BE-601UV probe (603).
3. The ignition control system of the sludge combustible gas hot blast stove according to claim 1, characterized in that the HV-A1 manual regulating valve (9), the PG240301 pressure gauge (10), the PT240301 pressure transmitter (11), the FV240301 pneumatic regulating valve (12) and the HV-A2 manual regulating valve (13) are sequentially arranged from the combustion fan (7) to the combustion air inlet (2).
4. The ignition control system of the sludge combustible gas hot blast stove according to claim 1, characterized in that the HV-G1 manual regulating valve (16), the PG240302 pressure gauge (17), the PT240302 pressure transmitter (18), the PV240302 pneumatic regulating valve (19), the XV240301 pneumatic switch valve (20), the PG240303 pressure gauge (21), the HV-G2 manual regulating valve (22), the pyrolysis gas mixer (23), the HV-G3 manual regulating valve (24), the PT240303 pressure transmitter (25), the XV240302 pneumatic switch valve (26), the HV240301 pneumatic regulating valve (27) and the HV-G4 manual regulating valve (28) are sequentially arranged from the pyrolysis gas source (14) to the pyrolysis gas inlet (3).
5. The ignition control system of the sludge combustible gas hot blast stove according to claim 1, characterized in that the HV-L1 manual regulating valve (37), the PG240305 pressure gauge (38), the HV-L2 manual regulating valve (39), the PCV240301 natural gas pressure reducing valve (40), the PG240306 pressure gauge (41), the XV240304 main pipe electromagnetic valve (42), the PT240304 pressure transmitter (43), the XV240303 main pipe electromagnetic valve (44), the TV240301 pneumatic regulating valve (45) and the HV-L3 manual regulating valve (46) are sequentially arranged from a natural gas source (32) to the pyrolysis gas mixer (23);
the HV-L4 manual regulating valve (47), the PCV240302 natural gas pressure reducing valve (48), the PG240308 pressure gauge (49), the SV240302 branch pipe electromagnetic valve (50) and the HV-L6 manual regulating valve (51) are sequentially arranged along the natural gas flow direction;
the tail ends of the first diffusion pipe (35) and the second diffusion pipe (36) are communicated and then are merged into the cracking diffusion pipeline (29).
6. The ignition control system of the sludge gas hot blast stove according to claim 1, characterized in that the PG240309 pressure gauge (56), HV-A3 manual regulating valve (58) and HV-A4 manual regulating valve (59) are arranged in sequence from the ignition fan (54) to the igniter (5).
7. The ignition control system of the sludge combustible gas hot air furnace according to claim 1, wherein the air compression station system comprises an air compression station (61) and an air supply main pipe (62) communicated with the air compression station (61) and a compressed air inlet (4), the air supply main pipe (62) is sequentially provided with an HV-C1 manual regulating valve (63) and a PG240304 pressure gauge (64), the air supply main pipe (62) is communicated with a plurality of air supply branch pipes, and the plurality of air supply branch pipes are respectively communicated with a PV240302 pneumatic regulating valve (19), an XV240301 pneumatic switching valve (20), an XV240302 pneumatic switching valve (26), an HV240301 pneumatic regulating valve (27), an FV240301 pneumatic regulating valve (12) and a TV240301 pneumatic regulating valve (45).
8. The ignition control system of the sludge combustible gas hot blast stove according to claim 7, characterized in that the main air supply pipe (62) is further provided with an HV-C2 manual regulating valve and an HV-C3 manual regulating valve, and the HV-C1 manual regulating valve (63), the PG240304 pressure gauge (64), the HV-C2 manual regulating valve and the HV-C3 manual regulating valve are sequentially arranged from the air compression station (61) to the compressed air inlet (4);
the gas supply branch pipes are communicated with the gas supply main pipe (62) between the PG240304 pressure gauge (64) and the HV-C2 manual regulating valve, and manual valves are respectively arranged on the gas supply branch pipes to control the on-off of the gas supply branch pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220625477.9U CN217031211U (en) | 2022-03-22 | 2022-03-22 | Sludge combustible gas hot-blast stove ignition control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220625477.9U CN217031211U (en) | 2022-03-22 | 2022-03-22 | Sludge combustible gas hot-blast stove ignition control system |
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| CN217031211U true CN217031211U (en) | 2022-07-22 |
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|---|---|---|---|
| CN202220625477.9U Active CN217031211U (en) | 2022-03-22 | 2022-03-22 | Sludge combustible gas hot-blast stove ignition control system |
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| Country | Link |
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| CN (1) | CN217031211U (en) |
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