CN217031211U - Sludge combustible gas hot-blast stove ignition control system - Google Patents

Abstract

The utility model relates to an ignition control system for a sludge combustible gas hot blast stove, which comprises a control cabinet and a hot blast stove, a combustion-supporting system, a pyrolysis gas system, a natural gas system, an ignition system and an air compressor station system respectively connected to the control cabinets; the combustion-supporting system It includes a combustion-supporting fan and a combustion-supporting air duct; the cracking gas system includes a cracking gas source, a cracking pipeline, and a cracking release pipeline; the natural gas system includes a natural gas source, a natural gas main pipe connecting the natural gas source and the cracking gas mixer, a natural gas branch pipe, The first and second release pipes; the natural gas main pipe is connected with the natural gas branch pipe, and the natural gas branch pipe is connected with the igniter; the ignition system includes an ignition fan and an ignition pipeline connecting the ignition fan and the hot blast stove; the air compressor station The system is connected to the hot blast stove. The utility model adopts different measures to realize the successful ignition and safety guarantee of the sludge combustible gas.

Description

A kind of sludge combustible gas hot blast stove ignition control system

technical field

The utility model relates to the technical field of municipal sludge pyrolysis and gasification, in particular to an ignition control system for a sludge combustible gas hot blast stove.

Background technique

Sludge is a solid precipitation material produced in the process of sewage treatment. The pollutants contained generally have a high calorific value, but due to the existence of a large amount of water, this part of the calorific value cannot be used.

Sludge pyrolysis and gasification technology is a technology that enables large-scale reduction, stabilization, harmlessness and resource utilization of sludge under the premise of odorless and pollution-free. The thermal efficiency of pyrolysis gasification technology is high. At high temperature and oxygen depletion, organic matter is pyrolyzed into combustible gases such as carbon monoxide, hydrogen, and hydrocarbons.

Due to the complex reaction process of sludge pyrolysis, the flammable gas components produced are difficult to control effectively, the calorific value is unstable, and there are many unstable factors in the ignition process. In order to ensure the ignition stability, high calorific value gas is used as the ignition source. After the temperature of the hot blast stove is raised to above 600°C, combustible gas is introduced to ignite. This is also the main way to ignite low calorific value gases.

At present, the traditional ignition method of low calorific value gas has certain requirements on the composition, pressure and flow of combustible gas, and the sludge combustible gas is difficult to ensure that these indicators are always stable due to the complex reaction generated, so there may be unexpected situations during ignition. In order to deal with these situations, an ignition control system for sludge combustible gas hot blast stove is proposed, and different measures are taken to ensure the success and safety of ignition.

SUMMARY OF THE INVENTION

In order to solve the problem that the current traditional ignition method of low calorific value gas is not suitable for the ignition of sludge combustible gas, the utility model provides an ignition control system for sludge combustible gas hot blast stove, which adopts different measures to realize the ignition of sludge combustible gas. Success and security.

For realizing the above-mentioned purpose, the technical scheme that the utility model adopts is:

An ignition control system for a sludge combustible hot blast stove, comprising a control cabinet and a hot blast stove, a combustion-supporting system, a pyrolysis gas system, a natural gas system, an ignition system and an air compressor station system respectively connected to the control cabinet, the hot blast stove includes a furnace body, Combustion air inlet, pyrolysis gas inlet, compressed air inlet, igniter and ignition gun;

The combustion-supporting system includes a combustion-supporting fan and a combustion-supporting air duct connecting the combustion-supporting fan and the combustion-supporting air inlet. The combustion-supporting air duct is sequentially provided with a HV-A1 manual regulating valve, a PG240301 pressure gauge, a PT240301 pressure transmitter, and a FV240301 pneumatic regulating valve. and HV-A2 manual regulating valve;

The cracking gas system includes a cracking gas source and a cracking pipeline connecting the cracking gas source and the cracking gas inlet, and the cracking pipeline is sequentially provided with HV-G1 manual regulating valve, PG240302 pressure gauge, PT240302 pressure transmitter, PV240302 pneumatic Control valve, XV240301 pneumatic switch valve, PG240303 pressure gauge, HV-G2 manual control valve, pyrolysis gas mixer, HV-G3 manual control valve, PT240303 pressure transmitter, XV240302 pneumatic switch valve, HV240301 pneumatic control valve and HV-G4 Manual regulating valve;

The cracking pipeline between the HV240301 pneumatic regulating valve and the HV-G4 manual regulating valve is connected with a cracking and venting pipeline, and the cracking and venting pipeline is sequentially provided with a HV-G5 manual venting valve and a HV-G6 manual venting valve;

The natural gas system includes a natural gas source, a natural gas main pipe connecting the natural gas source and the cracked gas mixer, a natural gas branch pipe, a first venting pipe and a second venting pipe;

The natural gas main pipe is sequentially provided with HV-L1 manual regulating valve, PG240305 pressure gauge, HV-L2 manual regulating valve, PCV240301 natural gas pressure reducing valve, PG240306 pressure gauge, XV240304 main solenoid valve, PT240304 pressure transmitter, XV240303 main solenoid valve, TV240301 pneumatic control valve and HV-L3 manual control valve;

The natural gas main pipe between the PG240305 pressure gauge and the HV-L2 manual regulating valve is connected to the natural gas branch pipe, the natural gas branch pipe is communicated with the igniter, and the natural gas branch pipe is sequentially provided with the HV-L4 manual regulating valve, the PCV240302 natural gas pressure reducing valve, PG240308 pressure gauge, SV240302 branch solenoid valve and HV-L6 manual regulating valve;

The natural gas main pipe between the TV240301 pneumatic control valve and the HV-L3 manual control valve is connected to the first release pipe, and the first release pipe is provided with a HV-L8 manual release valve; the SV240302 branch pipe solenoid valve and HV-L6 are manually adjusted The natural gas branch pipe between the valves is connected to the second release pipe, and the second release pipe is provided with an HV-L7 manual release valve;

The ignition system includes an ignition fan and an ignition pipeline that communicates 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 compressor station system is communicated with the compressed air inlet, and the air compressor station system is also communicated with each pneumatic valve to provide a power source.

Further, the pyrolysis gas inlet is provided with a BE-602UV probe, and the ignition gun includes an IT-601 ignition transformer, an IP-601 ignition electrode and a BE-601UV probe.

Further, the HV-A1 manual regulating valve, PG240301 pressure gauge, PT240301 pressure transmitter, FV240301 pneumatic regulating valve and HV-A2 manual regulating valve self-combustion fan are arranged in sequence toward the combustion-supporting air inlet.

Further, the HV-G1 manual regulating valve, PG240302 pressure gauge, PT240302 pressure transmitter, PV240302 pneumatic regulating valve, XV240301 pneumatic switching valve, PG240303 pressure gauge, HV-G2 manual regulating valve, cracked gas mixer, HV- G3 manual regulating valve, PT240303 pressure transmitter, XV240302 pneumatic switching valve, HV240301 pneumatic regulating valve and HV-G4 manual regulating valve are arranged in sequence from the cracking gas source to the cracking gas inlet.

Further, the HV-L1 manual regulating valve, PG240305 pressure gauge, HV-L2 manual regulating valve, PCV240301 natural gas pressure reducing valve, PG240306 pressure gauge, XV240304 main solenoid valve, PT240304 pressure transmitter, XV240303 main solenoid valve, TV240301 Pneumatic regulating valve and HV-L3 manual regulating valve are arranged in sequence from natural gas source to cracking gas mixer;

The HV-L4 manual regulating valve, PCV240302 natural gas pressure reducing valve, PG240308 pressure gauge, SV240302 branch pipe solenoid valve and HV-L6 manual regulating valve are arranged in sequence along the natural gas flow direction;

After the first and second ends of the venting pipe are connected, they are merged into the cracking and venting 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 compressor station system includes an air compressor station and an air supply main pipe connecting the air compressor station and the compressed air inlet. There are multiple air supply branches connected to the upper part, and the multiple air supply branches are respectively connected with PV240302 pneumatic regulating valve, XV240301 pneumatic switching valve, XV240302 pneumatic switching valve, HV240301 pneumatic regulating valve, FV240301 pneumatic regulating valve and TV240301 pneumatic regulating valve.

Further, the air supply main pipe is also provided with HV-C2 manual regulating valve and HV-C3 manual regulating valve, described HV-C1 manual regulating valve, PG240304 pressure gauge, HV-C2 manual regulating valve and HV-C3 manual regulating valve. The regulating valves are arranged in sequence from the air compressor station to the compressed air inlet;

The air supply main pipe between the PG240304 pressure gauge and the HV-C2 manual regulating valve is connected to the air supply branch pipe, and manual valves are respectively provided on the plurality of air supply branch pipes to control the on-off.

Through the above-mentioned technical scheme, the beneficial effects of the present utility model are:

The utility model has a reasonable structure design. According to the characteristics of the combustible gas of the sludge, the ignition conditions of the hot blast stove are determined, and the ignition preparation is carried out before the ignition. Aiming at the fluctuation of the combustible gas composition and calorific value of the sludge, the temperature of the ignition furnace is guaranteed by controlling the amount of natural gas during ignition. Aiming at the fluctuation of sludge combustible gas pressure and flow, the amount of sludge combustible gas is controlled to ensure that the gas pressure and flow during ignition meet the ignition requirements. The furnace temperature, sludge combustible gas content, flame and other indicators during ignition are monitored in real time through instruments and equipment, and the ignition process is suspended even if there is an abnormality to ensure safety.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the ignition control system of a sludge combustible gas hot blast stove of the present invention.

Figure 2 is a schematic diagram of a hot blast stove of a sludge combustible gas hot blast stove ignition control system of the present invention.

Fig. 3 is a schematic diagram of the combustion-supporting system of the ignition control system of a sludge combustible gas hot blast stove of the present invention.

4 is a schematic diagram of the pyrolysis gas system of the ignition control system of a sludge combustible hot blast stove of the present invention.

5 is a schematic diagram of the natural gas system of the ignition control system of a sludge combustible gas hot blast stove of the present invention.

6 is a schematic diagram of the ignition system of the ignition control system of a sludge combustible gas hot blast stove of the present invention.

7 is a schematic diagram of the air compressor station system of the ignition control system of a sludge combustible gas hot blast stove of the present invention.

Fig. 8 is a control logic flow chart of step 1 in an embodiment of the ignition control system for a sludge combustible gas hot blast stove of the present invention.

Fig. 9 is a control logic flow chart of step 2 in the embodiment of the ignition control system of a sludge combustible gas hot blast stove of the present invention.

Fig. 10 is a control logic flow chart of step 3 in the embodiment of the ignition control system for a sludge combustible hot blast stove of the present invention.

The numbers in the accompanying drawings are: 1 is the furnace body, 2 is the combustion-supporting air inlet, 3 is the pyrolysis gas inlet, 4 is the compressed air inlet, 5 is the igniter, 6 is the ignition gun, 601 is the IT-601 ignition transformer, and 602 is the IP -601 ignition electrode, 603 is BE-601UV probe, 7 is combustion fan, 8 is combustion air duct, 9 is HV-A1 manual regulating valve, 10 is PG240301 pressure gauge, 11 is PT240301 pressure transmitter, 12 is FV240301 pneumatic Regulating valve, 13 is HV-A2 manual regulating valve, 14 is pyrolysis gas source, 15 is pyrolysis pipeline, 16 is HV-G1 manual regulating valve, 17 is PG240302 pressure gauge, 18 is PT240302 pressure transmitter, 19 is PV240302 Pneumatic regulating valve, 20 is XV240301 pneumatic switching valve, 21 is PG240303 pressure gauge, 22 is HV-G2 manual regulating valve, 23 is pyrolysis gas mixer, 24 is HV-G3 manual regulating valve, 25 is PT240303 pressure transmitter, 26 is XV240302 pneumatic switching valve, 27 is HV240301 pneumatic regulating valve, 28 is HV-G4 manual regulating valve, 29 is cracking and venting pipeline, 30 is HV-G5 manual venting valve, 31 is HV-G6 manual venting valve, 32 is Natural gas source, 33 is the natural gas main pipe, 34 is the natural gas branch pipe, 35 is the bleeder pipe 1, 36 is the bleeder pipe 2, 37 is the HV-L1 manual regulating valve, 38 is the PG240305 pressure gauge, 39 is the HV-L2 manual regulating valve, 40 It is PCV240301 natural gas pressure reducing valve, 41 is PG240306 pressure gauge, 42 is XV240304 main solenoid valve, 43 is PT240304 pressure transmitter, 44 is XV240303 main solenoid valve, 45 is TV240301 pneumatic control valve, 46 is HV-L3 manual control valve , 47 is HV-L4 manual regulating valve, 48 is PCV240302 natural gas pressure reducing valve, 49 is PG240308 pressure gauge, 50 is SV240302 branch solenoid valve, 51 is HV-L6 manual regulating valve, 52 is HV-L8 manual venting valve, 53 HV-L7 manual release valve, 54 is ignition fan, 55 is ignition pipeline, 56 is PG240309 pressure gauge, 58 is HV-A3 manual regulating valve, 59 is HV-A4 manual regulating valve, 60 is BE-602UV probe, 61 is the air compressor station, 62 is the air supply main pipe, 63 is the HV-C1 manual regulating valve, 64 is the PG240304 pressure gauge, 65 is the TT240301 thermocouple, and 66 is the TIC240301 temperature display meter.

Detailed ways

The specific embodiments of the present utility model are described in detail below in conjunction with the accompanying drawings:

As shown in Figures 1 to 7, a sludge combustible hot blast stove ignition control system includes a control cabinet and a hot blast stove, combustion-supporting system, pyrolysis gas system, natural gas system, ignition system and air compressor station system respectively connected to the control cabinet. , The control cabinet controls the hot blast stove, combustion-supporting system, cracking gas system, natural gas system and ignition system respectively.

The hot blast stove includes a furnace body 1 , a combustion-supporting air inlet 2 , a cracking 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, which is used to detect the furnace temperature in the hot blast furnace, with a detection range of 0-1300°C. Thermocouple 65 and TIC240301 temperature display meter 66 are connected with a thermostat, which is installed in the control cabinet.

Air and natural gas should be introduced into the igniter 5, the pyrolysis gas inlet 3 is provided with a BE-602UV probe 60, and the ignition gun 6 includes an IT-601 ignition transformer 601, an IP-601 ignition electrode 602 and a BE- 601UV probe 603. The above UV probe is used to detect whether a flame is produced. The parameters of IT-601 ignition transformer 601 are 220V, 50Hz.

The combustion-supporting system includes a combustion-supporting fan 7 and a combustion-supporting air duct 8 connected to the combustion-supporting fan 7 and the combustion-supporting air inlet 2. The combustion-supporting air duct 8 is sequentially provided with a HV-A1 manual regulating valve 9, a PG240301 pressure gauge 10, and a PT240301 pressure changer. 11, FV240301 pneumatic regulating valve 12 and HV-A2 manual regulating valve 13.

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 arranged in turn from the combustion fan 7 to the combustion air inlet 2.

HV-A1 manual regulating valve 9 and HV-A2 manual regulating valve 13 are both DN200 manual butterfly valves, which are used to adjust the opening of combustion air valve. PG240301 pressure gauge 10 shows the pressure range of 0-16Kpa, and can display the combustion air pressure on site. PT240301 pressure transmitter 11 parameters are 0-16Kpa, DC24V, used to detect pipeline pressure, and transmit the pressure signal to the control cabinet.

The pyrolysis gas system includes a pyrolysis gas source 14 and a pyrolysis pipeline 15 connecting the pyrolysis gas source 14 and the pyrolysis gas inlet 3. The pyrolysis pipeline 15 is sequentially provided with an HV-G1 manual regulating valve 16, a PG240302 pressure gauge 17, PT240302 pressure transmitter 18, PV240302 pneumatic control valve 19, XV240301 pneumatic switch valve 20, PG240303 pressure gauge 21, HV-G2 manual control valve 22, pyrolysis gas mixer 23, HV-G3 manual control valve 24, PT240303 pressure transmission 25, XV240302 pneumatic switch valve 26, HV240301 pneumatic regulating valve 27 and HV-G4 manual regulating valve 28.

The HV-G1 manual regulating valve 16, PG240302 pressure gauge 17, PT240302 pressure transmitter 18, PV240302 pneumatic regulating valve 19, XV240301 pneumatic switching valve 20, PG240303 pressure gauge 21, HV-G2 manual regulating valve 22, pyrolysis gas mixing 23, HV-G3 manual regulating valve 24, PT240303 pressure transmitter 25, XV240302 pneumatic switching valve 26, HV240301 pneumatic regulating valve 27 and HV-G4 manual regulating valve 28 are arranged in sequence from the cracking gas source 14 to the cracking 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 all DN250 manual turbine butterfly valves, which are used to adjust the opening of the cracked gas valve. PG240302 pressure gauge 17 shows the pressure range of 0-25Kpa, and can display the cracked gas pressure on site. The 18 parameters of the PT240302 pressure transmitter are 0-25Kpa, DC24V, which are used to detect the pressure of the cracking pipeline 15, and transmit the pressure signal to the control cabinet to control the opening of the PV240302 pneumatic control valve 19; PT240302 pressure transmitter 18 is set There is low pressure protection, which is interlocked with XV240301 pneumatic switch valve 20 safely. At the same time, the PT240301 pressure transmitter 11 of the combustion system is set to low pressure protection, and it is also safely interlocked with the cracked gas XV240301 pneumatic switch valve 20.

The parameters of PV240302 pneumatic control valve 19 are DC24V, 4-20ma. Combined with PT240302 pressure transmitter 18 and PT240303 pressure transmitter 25, the inlet pressure of cracked gas can be adjusted. The parameters of XV240301 pneumatic switch valve 20 are AC220V, 50Hz. It is set with low pressure protection, and is interlocked with PT240302 and PT240301 pressure transmitter 11. At the same time, it is combined with XV240302 pneumatic switch valve 26 and PT240303 pressure transmitter 25 to achieve valve leak detection. PG240303 pressure gauge 21 shows the pressure range of 0-25Kpa, and can display the mixed gas pressure on site, that is, the mixed pressure of cracked gas and natural gas. The cracked gas mixer 23 is used for thorough mixing of cracked gas and natural gas. PT240303 pressure transmitter 25 parameters are 0-25Kpa, DC24V, which is used to detect the pressure of cracking pipeline 15, and transmit the pressure signal to the control cabinet to control the opening of PV240302 pneumatic control valve 19; PT240303 pressure transmitter 25 and XV240301 and XV240302 pneumatic switch valve 26 achieve valve leak detection.

The parameters of XV240302 pneumatic on-off valve 26 are AC220V, 50Hz, which is interlocked with BE-602UV probe 60, and combined with XV240301 pneumatic on-off valve 20 and PT240303 pressure transmitter 25 to achieve valve leak detection. HV240301 pneumatic control valve 27 parameters are DC24V, 4-20ma, its switch can be manipulated through the control cabinet, normally it is normally open.

The cracking pipeline 15 between the HV240301 pneumatic regulating valve 27 and the HV-G4 manual regulating valve 28 is communicated with a cracking and venting pipeline 29, and the cracking and venting pipeline 29 is sequentially provided with the HV-G5 manual venting valve 30 and the HV -G6 manual bleed valve 31. The HV-G5 manual release valve 30 and the HV-G6 manual release valve 31 are both DN40 manual butterfly valves, which are used for the release of cracked gas when the furnace is started and stopped.

The natural gas system includes a natural gas source 32 , a natural gas main pipe 33 connecting the natural gas source 32 and the cracked gas mixer 23 , a natural gas branch pipe 34 , a first release pipe 35 and a second release pipe 36 .

The natural gas main pipe 33 is sequentially provided with HV-L1 manual regulating valve 37, PG240305 pressure gauge 38, HV-L2 manual regulating valve 39, PCV240301 natural gas pressure reducing valve 40, PG240306 pressure gauge 41, XV240304 main pipe solenoid valve 42, PT240304 pressure Transmitter 43, XV240303 main solenoid valve 44, TV240301 pneumatic regulating valve 45 and HV-L3 manual regulating valve 46.

The HV-L1 manual regulating valve 37, PG240305 pressure gauge 38, HV-L2 manual regulating valve 39, PCV240301 natural gas pressure reducing valve 40, PG240306 pressure gauge 41, XV240304 main solenoid valve 42, PT240304 pressure transmitter 43, XV240303 main tube The solenoid valve 44 , the TV240301 pneumatic control valve 45 and the HV-L3 manual control valve 46 are sequentially arranged from the natural gas source 32 to the cracked 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 all DN40 manual valves for manually regulating the valve opening on the natural gas main pipe 33 . PG240305 pressure gauge 38 shows the pressure range of 0-1.6Mpa, and can display the pressure of natural gas on site.

The PCV240301 natural gas pressure reducing valve 40 is used for the pressure reduction of the natural gas main pipe 33 . The PG240306 pressure gauge 41 shows the pressure range of 0-25Kpa, and can display the pressure of the natural gas main pipe 33 after decompression on site. The parameters of the XV240304 main solenoid valve 42 are AC220V, 50Hz, and the XV240303 main solenoid valve 44 is combined with the PT240304 pressure transmitter 43 to achieve valve leak detection.

PT240304 pressure transmitter 43 parameters are 0-25Kpa, DC24V, which sets low pressure protection, used to display the pressure of natural gas main 33, and transmit the pressure signal to the control cabinet, PT240304 pressure transmitter 43 and XV240303 main solenoid valve 44 safety interlock. The parameters of the XV240303 main solenoid valve 44 are AC220V, 50Hz, and the XV240304 main solenoid valve 42 is combined with the PT240304 pressure transmitter 43 to achieve valve leak detection.

The parameters of TV240301 pneumatic control valve 45 are DC24V, 4-20ma, combined with TT240301 thermocouple 65, according to the temperature in the furnace to control the supplementary amount of natural gas, that is, to control the opening of natural gas TV240301 pneumatic control valve 45.

The natural gas main pipe 33 between the PG240305 pressure gauge 38 and the HV-L2 manual regulating valve 39 is communicated with the natural gas branch pipe 34, the natural gas branch pipe 34 is communicated with the igniter 5, and the natural gas branch pipe 34 is sequentially provided with the HV-L4 manual regulating valve 47. PCV240302 natural gas pressure reducing valve 48, PG240308 pressure gauge 49, SV240302 branch solenoid valve 50 and HV-L6 manual regulating valve 51.

The HV-L4 manual regulating valve 47, PCV240302 natural gas pressure reducing valve 48, PG240308 pressure gauge 49, SV240302 branch pipe solenoid valve 50 and HV-L6 manual regulating valve 51 are arranged in sequence along the natural gas flow direction.

The HV-L4 manual regulating valve 47 and the HV-L6 manual regulating valve 51 are both DN15 manual valves, which are used to manually adjust the valve opening on the natural gas branch pipe 34 . The PCV240302 natural gas pressure reducing valve 48 is used for the pressure reduction of the natural gas branch pipe 34 . The PG240308 pressure gauge 49 shows the pressure range of 0-25Kpa, and can display the pressure of the natural gas branch pipe 34 after decompression on site. SV240302 branch solenoid valve 50 parameters are AC220V, 50Hz, and BE-601UV probe 603 safety interlock.

The natural gas main pipe 33 between the TV240301 pneumatic control valve 45 and the HV-L3 manual control valve 46 is connected to the release pipe 1 35, and the HV-L8 manual release valve 52 is arranged on the release pipe 1 35; the SV240302 branch pipe solenoid valve The natural gas branch pipe 34 between 50 and the HV-L6 manual regulating valve 51 communicates with the second venting pipe 36, and the second venting pipe 36 is provided with an HV-L7 manual venting valve 53.

Specifically, after the ends of the first venting tube 35 and the second venting tube 36 are connected, they are merged into the cracking and venting pipeline 29 . The HV-L7 manual release valve 53 and the HV-L8 manual release valve 52 are both DN20 manual valves, which are used for the release of natural gas when the furnace is started and stopped.

The ignition system includes an ignition fan 54 and an ignition pipeline 55 that communicates with the ignition fan 54 and the igniter 5. The ignition pipeline 55 is sequentially provided with a PG240309 pressure gauge 56, an HV-A3 manual adjustment valve 58 and an HV-A4 manual adjustment valve. valve 59. The PG240309 pressure gauge 56 , the HV-A3 manual regulating valve 58 and the HV-A4 manual regulating valve 59 are sequentially arranged from the ignition fan 54 to the igniter 5 .

PG240309 pressure gauge 56 shows the 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 both DN25 manual valves, which are used to manually adjust the opening of the ignition air valve.

The air compressor station system is communicated with the compressed air inlet 4, and the air compressor station system is also communicated with each pneumatic valve to provide the power source required by the pneumatic valve.

Specifically, the air compressor station system includes an air compressor station 61 and an air supply main pipe 62 connecting the air compressor station 61 and the 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. HV-C1 manual regulating valve 63 is a DN25 manual valve; PG240304 pressure gauge 64 shows the pressure range of 0-1.6Mpa, and can display the pressure of compressed air on site.

The air supply main pipe 62 is also provided with the HV-C2 manual regulating valve and the HV-C3 manual regulating valve, 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. The regulating valves are sequentially arranged from the air compressor station 61 to the compressed air inlet 4 .

The air supply main pipe 62 is connected with a plurality of air supply branch pipes, and the air supply main pipe 62 between the PG240304 pressure gauge 64 and the HV-C2 manual regulating valve is connected to the air supply branch pipe, and the plurality of air supply branch pipes are respectively connected. A manual valve is provided to control on and 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 Figure 8 to Figure 10, the control steps for using this control system to carry out the ignition of the hot blast stove are as follows:

Step 1. Preparation before ignition:

Step 1.1, air compressor station 61, combustion support and ignition system test:

Step 1.1a, air compressor station system test: start the air compressor station 61, open the HV-C1 manual regulating valve 63, and observe the PG240304 pressure gauge 64 on-site to display normal.

Step 1.1b. Combustion system test: manually open HV-A1 manual regulating valve 9 to 60%, open HV-A2 manual regulating valve 13 to 60%; control cabinet manually start combustion supporting fan 7, adjust the frequency to 40Hz, check the pressure of PG240301 on site Table 10 shows the pressure, the display range is 3-4Kpa, and it is closed after normal.

Step 1.1c, ignition system test: manually open the HV-A3 manual regulating valve 58 to 100%, open the HV-A4 manual regulating valve 59 to 20%; manually start the ignition fan 54 in the control cabinet and check the operation status, check the PG240309 pressure gauge on site 56 display pressure, display range 9-10Kpa, close after normal.

Step 1.1d, the test is completed, waiting for ignition.

Step 1.2, release natural gas:

Step 1.2a, manually open the HV-L1 manual regulating valve 37, check the pressure on the PG240305 pressure gauge 38 on site, and the display is 0.1Mpa.

Step 1.2b, manually open the HV-L2 manual regulating valve 39, adjust the main PCV240301 natural gas pressure reducing valve 40, and check the pressure of the PG240306 pressure gauge 41 on site, which shows 5Kpa.

Step 1.2c, manually open the HV-L4 manual regulating valve 47, adjust the PCV240302 natural gas pressure reducing valve 48 of the branch pipe, and check the pressure of the PG240308 pressure gauge 49 on site, which shows 5Kpa.

Step 1.2d, manually open the main pipe HV-L8 manual relief valve 52 and the branch pipe HV-L7 manual relief valve 53, confirm that the main pipe HV-L3 manual regulating valve 46 and the branch pipe HV-L6 manual regulating valve 51 have been closed, ready for natural gas relief.

Step 1.2e. The control cabinet manually opens the XV240303 main solenoid valve 44 and XV240304 main solenoid valve 42, and opens the TV240301 pneumatic control valve 45 to 100%. The control cabinet manually opens the natural gas SV240302 branch pipe solenoid valve 50, and the natural gas is released for 5 minutes.

Step 1.2f, after the venting is over, close all manual venting valves opened in step 1.2d, close all solenoid valves and pneumatic regulating valves opened in step 1.2e; open the main HV-L3 manual regulating valve 46 to 50%, and open the branch HV -L6 manual regulating valve 51 to 20%.

Step 1.2g, the natural gas is released, and wait for ignition.

Step 1.3, release the cracked gas:

Step 1.3a, manually open the HV-G1 manual regulating valve 16, check the pressure of the PG240302 pressure gauge 17 on site, and the display is in the range of 10-20Kpa.

Step 1.3b, manually open the cracked gas HV-G2 manual regulating valve 22, HV-G3 manual regulating valve 24 to 50%, open the HV-G4 manual regulating valve 28 to 20%, and open the HV-G6 manual venting valve 31.

At the same time, the PT240302 pressure transmitter 18 presets the low-pressure protection value of 2Kpa. If the detection pressure is 3-4Kpa, the pressure is normal, and the ignition condition 1 is satisfied; if the detection pressure is lower than 2Kpa, it will output an alarm to check the cause. After the pressure is normal, it will automatically Clear the alarm.

Step 1.3c. Manually open the cracked gas HV-G5 manual release valve 30, confirm that the HV-G4 manual control valve 28 is closed, and prepare for the cracked gas release.

Step 1.3d, manually open the pyrolysis gas XV240301 pneumatic switch valve 20, the pyrolysis gas XV240302 pneumatic switch valve 26, open the pyrolysis gas PV240302 pneumatic control valve 19, and the pyrolysis gas HV240301 pneumatic control valve 27 to 100%, and release the pyrolysis gas. Time 5min.

Step 1.3e. After the venting is over, close all the manual venting valves opened in step 1.3c, close all the pneumatic switching valves and pneumatic regulating valves opened in step 1.3d, and open the HV-G4 manual regulating valve 28 to 50%.

Step 1.3f, the pyrolysis gas is released, and wait for ignition.

Step 2. Leak detection and ignition of natural gas system and cracked gas system, and start of combustion-supporting system:

Step 2.1, natural gas system leak detection:

Step 2.1a. Prepare the natural gas valve for leak detection: automatically open the pyrolysis gas HV240301 pneumatic control valve 27 to 50%, automatically open the pyrolysis gas XV240302 pneumatic switch valve 26, and automatically open the natural gas TV240301 pneumatic control valve 45 to 20%.

Step 2.1b, perform natural gas valve leak detection: automatically open the natural gas XV240303 main solenoid valve for 443s and then close it, and the PT240304 pressure transmitter 43 detects the pressure change for 3s after the XV240303 main solenoid valve 44 is closed.

Step 2.1c, when the PT240304 pressure transmitter 43 detects no pressure during the opening of the natural gas XV240303 main solenoid valve 44, the leak detection is successful, and the next step is entered; if the PT240304 pressure transmitter 43 detects pressure, the leak detection fails and an alarm is output, and at the same time Close the XV240303 main solenoid valve 44, check the cause and return to step 2.1a.

Step 2.1d, perform the natural gas valve leak detection again: automatically open the natural gas XV240304 main solenoid valve for 423s and then close it, and the PT240304 pressure transmitter 43 detects the pressure change for 3s after the XV240304 main solenoid valve 42 is closed.

Step 2.1e, when the PT240304 pressure transmitter 43 detects no pressure during the opening of the natural gas XV240304 main solenoid valve 42, the leak detection is successful, and the next step is entered; if the PT240304 pressure transmitter 43 detects pressure, the leak detection fails and an alarm is output, and at the same time Close the XV240304 main solenoid valve 42, check the cause and return to step 2.1a.

Step 2.1f, after the leak detection is successful, open the natural gas XV240304 main solenoid valve 42, and the PT240304 pressure transmitter 43 detects that the pressure is normal 5Kpa, which meets the ignition condition three.

Step 2.2, cracking gas system leak detection:

Step 2.2a. Prepare the cracking gas valve for leak detection: automatically close the cracking gas XV240302 pneumatic switch valve 26 and open the cracking gas PV240302 pneumatic regulating valve 19 to 50%.

Step 2.2b, perform cracking gas valve leak detection: automatically open the cracking gas XV240302 pneumatic switch valve for 265s and then close it, and the PT240303 pressure transmitter 25 detects the pressure change after the cracking gas XV240302 pneumatic switch valve 26 is closed.

Step 2.2c, when the PT240303 pressure transmitter 25 detects no pressure during the opening of the pyrolysis gas XV240302 pneumatic switch valve 26, the leak detection passes, and the next step is entered; if the PT240303 pressure transmitter 25 detects pressure, the leak detection fails and an alarm is output. At the same time, close the XV240302 pneumatic switch valve 26, check the cause and return to step 2.1a.

Step 2.2d, and then perform the cracking gas valve leak detection: automatically open the XV240301 pneumatic switch valve for 205s and then close it, and the PT240303 pressure transmitter 25 detects the pressure change after the cracking gas XV240301 pneumatic switch valve 20 is closed.

Step 2.2e. When the pressure detected by the PT240303 pressure transmitter 25 does not change during the opening of the pyrolysis gas XV240301 pneumatic switch valve 20, the leak detection is passed, and the next step is entered; if the PT240303 pressure transmitter 25 detects pressure, the leak detection fails and an alarm is output , while closing the XV240301 pneumatic switch valve 20, check the cause and return to step 2.1a.

Step 2.2f, after passing the leak detection, open the XV240301 pneumatic switch valve 20 to satisfy the ignition condition four.

Step 2.3, start the ignition and combustion support system:

Step 2.3a, start the ignition fan 54 automatically, if there is no return to running signal 5s after starting, the output alarm program will stop, check the reason, and return to step 2.3a.

Step 2.3b, automatically start the combustion fan 7, adjust the frequency to 40Hz, automatically open the FV240301 pneumatic control valve 12 to 20%, the PT240301 pressure transmitter 11 presets the low pressure protection value 2Kpa, the detection pressure is 3-4Kpa, the pressure is normal, The ignition condition 2 is satisfied; if the detection pressure is lower than 2Kpa, the output alarm program will stop, check the reason, and return to step 2.3a.

Step 3. Ignite the hot blast stove:

Step 3.1. After the four ignition conditions are met, start purging before ignition: automatically open the FV240301 pneumatic control valve for 12 to 100%, and then close to 10% ignition opening after purging for 180s.

Step 3.2. Automatically turn on the IT-601 ignition transformer 601 and the IP-601 ignition electrode 602 to discharge for 8s, automatically turn on the SV240302 branch solenoid valve 503s for ignition, and the BE-601UV probe 603 detects the flame.

If the BE-601UV probe 603 does not detect the flame, the SV240302 branch solenoid valve 50 will be automatically closed, and the ignition will be repeated 1-2 times after an interval of 5s, and the program will continue after the flame is detected. SV240302 branch solenoid valve 50, check the cause, and return to step 3.1.

BE-601UV probe 603 detects the flame, the SV240302 branch solenoid valve 50 is normally open, automatically opens the pyrolysis gas HV240301 pneumatic control valve 27 to 15%, automatically opens the pyrolysis gas XV240302 pneumatic switch valve 2610s, BE-602UV probe 60 detects the flame.

Step 3.3. The BE-602UV probe 60 does not detect the flame, automatically closes the pyrolysis gas XV240302 pneumatic switch valve 26, and then opens the pyrolysis gas XV240302 pneumatic switch valve 2610s after an interval of 15s, and the procedure continues after the flame is detected.

If the BE-602UV probe 60 still does not detect the flame, an alarm is issued and the pyrolysis gas XV240302 pneumatic switch valve 26 is automatically closed, and then any of the following operations can be performed. Operation 1: Check the reason, and return to step 3.1; Operation 2: Turn the XV240302 pneumatic switch The valve 26 is switched to manual, the program is suspended, and the XV240302 pneumatic switch valve 26 is manually opened after checking the cause. After the BE-602UV probe 60 detects the flame, the XV240302 pneumatic switch valve 26 is switched to automatic, and the program continues.

The BE-602UV probe 60 detects the flame, the pyrolysis gas XV240302 pneumatic switch valve 26 is normally open, automatically opens the pyrolysis gas HV240301 pneumatic control valve 27 to fully open, and then switches to manual mode, the ignition is successful, and the automatic control program is entered. The automatic control program includes the furnace pressure control logic and furnace temperature control logic.

Compressor, combustion and ignition system testing of the entire control steps above ensures that these functions work properly during ignition. The emission test of natural gas and cracked gas can ensure that the emission system can normally achieve the emission function when the ignition is abnormal. The natural gas and cracked gas leak detection is to ensure that the natural gas and cracked gas valves can normally achieve the cut-off function and prevent the leakage of combustible gas. Alarm and safety interlocking: if the natural gas and cracked gas leak detection fails, the ignition process stops, and the ignition command can be re-accepted after the fault is eliminated. When the combustion-supporting fan fails, the ignition process stops, and the ignition command can be re-accepted after the fault is eliminated. When the PT240301 pressure transmitter is lower than the set protection value, the ignition process stops, and the ignition command can be re-accepted after the abnormality is eliminated. 2 fire detections, i.e. BE-601UV probe and BE-602UV probe do not detect flame for a certain period of time, it will prompt no fire alarm and try to ignite again. malfunction and stop the ignition process.

The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes made in accordance with the structures, features and principles described in the patent scope of the present invention or Modifications should be included in the scope of the patent application 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.

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