Automatic control system and control method for oxygen-enriched combustion coal pyrolysis air intake

Abstract

The invention discloses an automatic control system and control method for oxygen-enriched combustion coal pyrolysis intake, and relates to the technical field of automatic control, the automatic control system comprises an oxygen intake control system, a carbon dioxide intake control system, a coal gas intake control system, a safety interlocking control system and a one-key parking interlocking system, the oxygen inlet control system, the carbon dioxide inlet control system and the coal gas inlet control system are all electrically connected with the safety interlocking control system, the safety interlocking control system is used for controlling the inlet states of oxygen, carbon dioxide and coal gas, and the one-key parking interlocking system is electrically connected with the safety interlocking control system. When the pressure of any one of oxygen-enriched gas, carbon dioxide and returned gas is insufficient, gas supply can be automatically and emergently closed, equipment ignition and explosion caused by excessive oxygen due to continuous gas supply are prevented, and meanwhile, nitrogen is automatically introduced after gas is cut off, so that the equipment is protected.

Description

Technical Field

[0001] The present invention relates to the field of automatic control technology, and specifically to an automatic control system and a control method for oxygen-enriched combustion coal pyrolysis air intake. Background Art

[0002] At present, some pyrolysis furnace air intake systems use fuel gas source and oxygen-enriched source. The oxygen-enriched source is used as the combustion-supporting air and secondary air of the pyrolysis furnace. Compared with the conventional solution that uses ordinary carbon dioxide as the combustion-supporting air and secondary air of the pyrolysis furnace, the nitrogen content in the oxygen-enriched source is greatly reduced, so the quality of the pyrolysis gas produced by the pyrolysis furnace is improved, and the pollution caused by the emission of nitrides to the environment is reduced. In actual production, the oxygen-enriched source is prepared by mixing a small amount of carbon dioxide and a large amount of pure oxygen. However, in the process of mixing carbon dioxide and pure oxygen, there will be problems such as the difficulty in controlling and uneven mixing ratio of carbon dioxide and pure oxygen. At the same time, there are unreasonable pipeline settings in the pyrolysis furnace air intake system, which affects the precise supply of fuel gas and oxygen-enriched oxygen, and then causes oxygen, carbon dioxide, and return gas pressures to fluctuate greatly due to various reasons. During the fluctuation process, it is easy to cause burner over-oxygenation, resulting in fire channel ignition and burner burnout, and even over-oxygen flash explosion of carbonization furnace, gas pipeline and subsequent equipment and facilities.

[0003] The patent with the publication number CN214496180U discloses an automatic control system for oxygen-enriched combustion coal pyrolysis air intake, including a carbon dioxide blower, the air inlet of the carbon dioxide blower is connected to the air inlet pipeline provided with a second flow solenoid valve, the air outlet of the carbon dioxide blower is connected to the air inlet of the oxygen pipe, the oxygen outlet of the oxygen tank is connected to the oxygen inlet of the carbon dioxide blower through the oxygen outlet pipe, the oxygen outlet pipe is provided with a first flow solenoid valve, the oxygen pipe is provided with an oxygen concentration detection probe and a gas pipe interface, the air outlet of the oxygen pipe is connected to the air inlet of the pyrolysis furnace, the gas source is connected to the gas pipe interface through the gas pipe, the gas pipe is provided with a third flow solenoid valve, the first flow solenoid valve, the second flow solenoid valve, the third flow solenoid valve, the oxygen concentration detection probe, and the carbon dioxide blower are all electrically connected to the control panel. The patent can accurately control the flow of input carbon dioxide, pure oxygen and gas, and improve the efficiency of coal pyrolysis and the quality of pyrolysis gas through reasonable pipeline settings.

[0004] However, the current automatic control system for oxygen-enriched combustion coal pyrolysis air intake has the following problems: when the pressure of any one of the oxygen-enriched gas, carbon dioxide, and recycled coal gas is insufficient, it is difficult to shut down the gas supply in an emergency, resulting in continuous gas supply and causing excessive oxygen fire and explosion of the equipment. Therefore, we propose an automatic control system and control method for oxygen-enriched combustion coal pyrolysis air intake. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic control system and control method for oxygen-enriched combustion coal pyrolysis air intake, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic control system for oxygen-enriched combustion coal pyrolysis air intake, including an oxygen intake control system, a carbon dioxide intake control system, a coal gas intake control system, a safety interlock control system and a one-button stop interlock system, the oxygen intake control system, the carbon dioxide intake control system and the coal gas intake control system are all electrically connected to the safety interlock control system, the safety interlock control system is used to control the intake state of oxygen, carbon dioxide and coal gas, the one-button stop interlock system is electrically connected to the safety interlock control system, and the one-button stop interlock system is used to control the safety interlock control system to cut off the intake of oxygen, carbon dioxide and coal gas.

[0007] The oxygen intake control system includes an oxygen pipe, an oxygen valve and an oxygen analysis module. The oxygen valve is installed on the oxygen pipe and is used to control the delivery of oxygen inside the oxygen pipe. The oxygen analysis module is electrically connected to the oxygen valve and is used to control the opening and closing of the oxygen valve.

[0008] The carbon dioxide intake control system includes a carbon dioxide pipe, a carbon dioxide valve and a carbon dioxide analysis module. The carbon dioxide valve is installed on the carbon dioxide pipe and is used to control the delivery of oxygen inside the carbon dioxide pipe. The carbon dioxide analysis module is electrically connected to the carbon dioxide valve and is used to control the opening and closing of the carbon dioxide valve.

[0009] The gas intake control system includes a gas pipe, a gas valve and a gas analysis module. The gas valve is installed on the gas pipe and is used to control the delivery of oxygen inside the gas pipe. The gas analysis module is electrically connected to the gas valve and is used to control the opening and closing of the gas valve.

[0010] The safety interlock control system is installed on the top of the integrated board, characterized in that: the outlets of the gas pipe, the carbon dioxide pipe and the oxygen pipe are all connected to the air inlet burner of the carbonization furnace, and the gas pipe, the carbon dioxide pipe and the oxygen pipe are all installed on the top of the integrated board, and a gas equalization component is also provided on the top of the integrated board; The gas equalization component includes a nitrogen pipe, which is fixed on the top surface of the integrated board. A nitrogen control valve is installed on the nitrogen pipe, and the nitrogen control valve is electrically connected to the safety interlock control system. A round tank is fixedly installed on the right end of the nitrogen pipe, and the bottom surface of the round tank is fixedly connected to the top surface of the integrated board. A round shell is fixedly installed in the middle of the left side of the round tank, and a servo motor is fixedly installed on the right side of the inner wall of the round shell. A round rod is penetrated and rotatably installed in the middle of the right side of the round tank, the left end of the round rod is fixedly connected to the right end of the rotating shaft of the servo motor, and the right end of the round rod is rotatably connected to the left side of the inner wall of the round tank. Three plates are fixed in the middle of the outer wall of the round rod, and an L-shaped conduit is penetrated and fixed at the bottom of the right side of the round tank. The outer wall of the L-shaped conduit penetrates and is fixed on the top surface of the integrated board, and an anti-leakage component is arranged on the left side of the outer wall of the round rod.

[0011] According to the above technical solution, the anti-leakage component includes a disc, which is fixedly mounted on the left side of the outer wall of the round rod, and a rubber ring is fixed on the left edge of the disc. The outer wall of the disc is rotatably connected to the inner wall of the wide ring plate, and the wide ring plate is fixed on the right side of the inner wall of the round tank. The disc is reversed in the wide ring plate, and the rubber ring blocks nitrogen from flowing out of the gap of the round tank during the rotation process. An anti-adhesion device is arranged on the right side of the disc, and a purification device is arranged at one end of the anti-adhesion devices close to each other.

[0012] According to the above technical solution, the gas pipe is located on the left side of the safety interlock control system, the carbon dioxide pipe is located in front of the safety interlock control system, the oxygen pipe is located in front of the carbon dioxide pipe, and the nitrogen pipe is located on the back of the safety interlock control system. The safety interlock control system controls each valve through a data line.

[0013] According to the above technical solution, the anti-adhesion device includes two U-shaped frames, two thin rods, a ring block and two curved plates. The two U-shaped frames are respectively fixed on the right side of the disc, the two thin rods are respectively fixed on the ends of the two U-shaped frames away from the disc, the ring block is fixed on the ends of the two thin rods close to each other, the inner wall of the ring block is rotatably connected to the left side of the inner wall of the round tank, the two curved plates are respectively fixed on the sides of the two U-shaped frames away from each other, the outer walls of the two curved plates are in sliding contact with the inner wall of the round tank, the U-shaped frames drive the curved plates to reverse, and during the rotation of the curved plates, the curved plates scrape off the nitrogen residues attached to the wall of the round tank.

[0014] According to the above technical solution, the anti-adhesion device also includes four L-shaped rods, four straight ring blocks and four sponge pads. The four L-shaped rods respectively penetrate and are fixed on both sides of the two U-shaped frames away from each other. The four straight ring blocks are respectively fixed on the outer walls of the four L-shaped rods. The four sponge pads are respectively fixed on the outer walls of the four straight ring blocks. The outer walls of the four sponge pads are in sliding contact with the inner wall of the round can. During the rotation of the sponge pads, the sponge pads wipe the corners of the round can.

[0015] According to the above technical scheme, the purification device includes four L-shaped plates, two ring frames, two activated carbon discs and four filter screens. The four L-shaped plates are respectively fixed on one end of the four L-shaped rods close to each other, the two ring frames are respectively fixed on the side of the four L-shaped plates away from each other, the two activated carbon discs are respectively fixedly installed in the middle of the inner walls of the two ring frames, the four filter screens are respectively fixed on the inner walls of the two ring frames in groups of two, and the four filter screens are respectively located on the left and right sides of the two activated carbon discs. The nitrogen passes through the filter screen and contacts the activated carbon disc. The activated carbon disc contacts the nitrogen over a large area during rotation. The activated carbon disc filters moisture and impurities in the nitrogen to improve the purity of the nitrogen.

[0016] According to the above technical scheme, the purification device also includes four connecting plates, eight arc-shaped spring pieces and eight semi-arc blocks. The four connecting plates are respectively fixed on one side of the four L-shaped plates close to the two U-shaped frames, the eight arc-shaped spring pieces are respectively fixed on the front and back sides of the four connecting plates in groups of two, and the eight semi-arc blocks are respectively fixed on one side of each arc-shaped spring piece away from the four connecting plates. The outer walls of the eight semi-arc blocks are fixedly connected to the outer walls of the two ring frames. The arc-shaped spring pieces drive the semi-arc blocks to reverse. Under the elastic force of the arc-shaped spring pieces, the amplitude of the ring frame during rotation is reduced.

[0017] According to the above technical solution, the two activated carbon discs are respectively sleeved on both sides of the outer wall of the round rod, and the four filter screens are respectively sleeved on both sides of the outer wall of the round rod.

[0018] A method for controlling the intake air of oxygen-enriched combustion coal pyrolysis, comprising the following steps: Step 1: In order to prevent the return air pressure or return gas pressure from being too low and causing tempering, an interlock control system for the return air pressure and the return gas pressure is set. When the return air pressure or the return gas pressure is lower than the preset interlock value, the DCS system issues a low alarm; when the pressure is lower than the preset interlock value, the DCS system issues a low alarm, interlocks to close the air pipeline switch valve, interlocks to close the gas valve, and opens the protective nitrogen control valve and the cut-off valve at the same time to isolate and protect the fuel and gasifying agent from the gas system, ensuring the safety of system shutdown, and triggering the one-button shutdown system at the same time. The system stops safely according to the interlock sequence control; Step 2: To prevent emergencies, set an emergency stop button to ensure that the system stops safely in an emergency; Step 3: In order to prevent the carbon dioxide pipe pressure from being too low, a carbon dioxide pipe pressure interlock system is set up. When the return carbon dioxide pressure is lower than the preset interlock value, the DCS system issues a low alarm and interlocks and closes the carbonization furnace carbon dioxide valve and carbon dioxide decompression valve.

[0019] The present invention provides an automatic control system and control method for oxygen-enriched combustion coal pyrolysis air intake, which has the following beneficial effects: (1) The present invention uses a safety interlock control system, a gas pipe, a carbon dioxide pipe, an oxygen pipe, a nitrogen pipe, a round tank, a round shell, a servo motor, a round rod, a plate, an L-shaped conduit, a disc and a rubber ring in combination with a wide ring plate, and automatically adjusts the amount of each gas entering through a gas valve, a carbon dioxide valve and an oxygen valve, and can accurately control the flow of input carbon dioxide, oxygen-rich gas and coal gas, thereby improving the efficiency of coal pyrolysis and the quality of pyrolysis gas, and further improving the dry distillation effect of solid raw materials. When the pressure of any one of the oxygen-rich gas, carbon dioxide and recycled coal gas is insufficient, the gas supply can be automatically shut down in an emergency to prevent gas leakage. The continuous supply of oxygen causes the equipment to catch fire and explode due to over-oxygen. At the same time, after the gas is cut off, the safety interlock control system controls the nitrogen control valve to start and automatically connects the nitrogen to protect the equipment. During the rotation of the plate, the plate contacts the nitrogen, and the plate fans the nitrogen to allow the nitrogen to enter the L-shaped duct evenly. The L-shaped duct inputs the uniform nitrogen into the carbonization furnace to prevent the internal furnace pressure of the carbonization furnace from increasing instantly and causing damage to the internal furnace of the carbonization furnace. The disc is reversed in the wide ring plate, and the rubber ring is rotated to block the nitrogen from flowing out of the gap in the round tank to prevent the nitrogen from flowing out of the gap in the round tank and causing nitrogen leakage.

[0020] (2) The present invention sets an anti-adhesion device so that the U-shaped frame, thin rod, ring block, curved plate, L-shaped rod and straight ring block cooperate with the sponge pad. The U-shaped frame drives the curved plate to reverse. During the rotation of the curved plate, the curved plate scrapes off the nitrogen residue attached to the wall of the round tank to prevent the round tank from being easily damaged by aging due to a large amount of nitrogen residue attached to the wall of the round tank. During the rotation of the sponge pad, the sponge pad wipes the corners of the round tank to prevent the corners of the round tank from being easily corroded by the nitrogen residue.

[0021] (3) The present invention arranges the purification device so that the L-shaped plate, the ring frame, the activated carbon disk, the filter screen, the connecting plate and the arc spring piece cooperate with the semi-arc block, and the nitrogen passes through the filter screen and contacts the activated carbon disk. The activated carbon disk contacts the nitrogen over a large area during the rotation process. The activated carbon disk filters the moisture and impurities in the nitrogen, thereby improving the purity of the nitrogen and preventing the nitrogen from containing a large amount of impurities, which may cause the carbonization furnace to have a poor protective effect. In addition, the arc spring piece drives the semi-arc block to reverse, and under the elastic force of the arc spring piece, the amplitude of the ring frame during rotation is reduced, thereby preventing the ring frame from vibrating and being damaged by the strong amplitude caused by the rotation of the ring frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the connection between the present invention as a whole and a carbonization furnace; Figure 2 A schematic diagram of the present invention as a whole; Figure 3 It is a cross-sectional schematic diagram of the gas equalization component of the present invention; Figure 4 It is a schematic diagram of the gas intake control system of the present invention; Figure 5 This is a schematic diagram of the carbon dioxide intake control system of the present invention; Figure 6 This is a schematic diagram of the oxygen intake control system of the present invention; Figure 7 For the present invention Figure 3 A local enlarged schematic diagram of the middle A; Figure 8 is a schematic diagram of the anti-adhesion device of the present invention; Fig. 9 For the present invention Figure 8 A partial enlarged schematic diagram of point B in the middle; Fig.10 It is a cross-sectional schematic diagram of the purification device of the present invention; Fig.11 For the present invention Fig.10 A partial enlarged schematic diagram of point C in the middle.

[0023] In the figure: 1. integrated board; 2. safety interlock control system; 3. gas pipe; 31. gas valve; 32. gas analysis module; 4. carbon dioxide pipe; 41. carbon dioxide valve; 42. carbon dioxide analysis module; 5. oxygen pipe; 51. oxygen valve; 52. oxygen analysis module; 21. gas equalization component; 211. nitrogen pipe; 2111. nitrogen control valve; 212. round tank; 213. round shell; 214. servo motor; 215. round rod; 2 16. Sheet plate; 217. L-shaped conduit; 22. Anti-leakage component; 221. Disc; 222. Rubber ring; 223. Ring width plate; 6. Anti-attachment device; 61. U-shaped frame; 62. Thin rod; 63. Ring block; 64. Arc-bent plate; 65. L-shaped rod; 66. Ring straight block; 67. Sponge pad; 7. Purification device; 71. L-shaped plate; 72. Ring frame; 73. Activated carbon disc; 74. Filter screen; 75. Connecting plate; 76. Arc-shaped spring piece; 77. Semi-arc block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] See also Figure 1-Figure 11 An embodiment of the present invention is: an automatic control system and control method for oxygen-enriched combustion coal pyrolysis air intake, including an oxygen intake control system, a carbon dioxide intake control system, a coal gas intake control system, a safety interlock control system 2 and a one-button stop interlock system, the oxygen intake control system, the carbon dioxide intake control system and the coal gas intake control system are all electrically connected to the safety interlock control system 2, the safety interlock control system 2 is used to control the intake state of oxygen, carbon dioxide and coal gas, the one-button stop interlock system is electrically connected to the safety interlock control system 2, and the one-button stop interlock system is used to control the safety interlock control system 2 to cut off the intake of oxygen, carbon dioxide and coal gas.

[0026] The oxygen intake control system includes an oxygen pipe 5, an oxygen valve 51 and an oxygen analysis module 52. The oxygen valve 51 is installed on the oxygen pipe 5 and is used to control the delivery of oxygen inside the oxygen pipe 5. The oxygen analysis module 52 is electrically connected to the oxygen valve 51 and is used to control the opening and closing of the oxygen valve 51.

[0027] The carbon dioxide intake control system includes a carbon dioxide pipe 4, a carbon dioxide valve 41 and a carbon dioxide analysis module 42. The carbon dioxide valve 41 is installed on the carbon dioxide pipe 4 and is used to control the delivery of oxygen inside the carbon dioxide pipe 4. The carbon dioxide analysis module 42 is electrically connected to the carbon dioxide valve 41 and is used to control the opening and closing of the carbon dioxide valve 41.

[0028] The gas intake control system includes a gas pipe 3, a gas valve 31 and a gas analysis module 32. The gas valve 31 is installed on the gas pipe 3 and is used to control the delivery of oxygen inside the gas pipe 3. The gas analysis module 32 is electrically connected to the gas valve 31 and is used to control the opening and closing of the gas valve 31.

[0029] The safety interlock control system 2 is installed on the top of the integrated board 1, and is characterized in that: the outlets of the gas pipe 3, the carbon dioxide pipe 4 and the oxygen pipe 5 are all connected to the air inlet burner of the carbonization furnace, and the gas pipe 3, the carbon dioxide pipe 4 and the oxygen pipe 5 are all installed on the top of the integrated board 1, and a gas equalization component 21 is also provided on the top of the integrated board 1; The gas equalization component 21 includes a nitrogen pipe 211, which is fixed to the top surface of the integrated board 1. A nitrogen control valve 2111 is installed on the nitrogen pipe 211, and the nitrogen control valve is electrically connected to the safety interlock control system 2. A round tank 212 is fixedly installed on the right end of the nitrogen pipe 211, and the bottom surface of the round tank 212 is fixedly connected to the top surface of the integrated board 1. A round shell 213 is fixedly installed in the middle of the left side of the round tank 212, and a round shell 213 is fixedly installed on the right side of the inner wall of the round shell 213. Servo motor 214, a round rod 215 is penetrated and rotatably installed in the middle of the right side of the round can 212, the left end of the round rod 215 is fixedly connected to the right end of the rotating shaft of the servo motor 214, the right end of the round rod 215 is rotatably connected to the left side of the inner wall of the round can 212, three plates 216 are fixed in the middle of the outer wall of the round rod 215, an L-shaped conduit 217 is penetrated and fixed on the bottom of the right side of the round can 212, and the outer wall of the L-shaped conduit 217 is penetrated and fixed on the top surface of the integrated board 1.

[0030] An anti-leakage component 22 is arranged on the left side of the outer wall of the round rod 215, and the anti-leakage component 22 includes a disc 221, which is fixedly mounted on the left side of the outer wall of the round rod 215, and a rubber ring 222 is fixed on the left edge of the disc 221. The outer wall of the disc 221 is rotatably connected to the inner wall of the wide ring plate 223, and the wide ring plate 223 is fixed on the right side of the inner wall of the round tank 212. The disc 221 is reversed in the wide ring plate 223. During the rotation of the rubber ring 222, the rubber ring 222 blocks the nitrogen from flowing out of the gap of the round tank 212, so as to avoid the nitrogen leakage caused by the nitrogen flowing out of the gap of the round tank 212 when the automatic control system inputs nitrogen. The raw coal is fed from the top of the carbonization furnace and discharged from the bottom after carbonization in the carbonization furnace.

[0031] When in use, the gas input from the gas pipe 3 is ignited, the inner furnace of the carbonization furnace begins to burn, the coal in the carbonization furnace begins to heat up, and the carbonization furnace performs medium and low temperature dry distillation on the coal. At the same time, the carbon dioxide pipe 4 inputs carbon dioxide to the carbonization furnace, and the oxygen pipe 5 inputs oxygen-rich gas to the carbonization furnace to improve the combustion efficiency of the carbonization furnace. Oxygen-rich gas is used as an oxidant, and the oxygen-rich gas is mixed with the recycled coal gas through the burner and enters the fire channel. Under the action of red charcoal, high-temperature gas is generated, and the high-temperature gas moves upward to dry distill the coal. When the air pressure sensor of the safety interlock control system 2 senses low oxygen pressure, low carbon dioxide pressure, and low oxygen-rich gas pressure, if any one of the conditions is met, the safety interlock control system 2 will control the combustion of the coal through the digital The data line closes the gas valve 31, carbon dioxide valve 41, and oxygen valve 51 of the gas pipe 3, the carbon dioxide pipe 4, and the oxygen pipe 5. At the same time, the safety interlock control system 2 opens the nitrogen pipe 211 through the data line, and automatically adjusts the amount of each gas entering through the gas valve 31, the carbon dioxide valve 41, and the oxygen valve 51, so as to accurately control the flow of the input carbon dioxide, oxygen-rich gas, and coal gas. Through reasonable pipeline settings, the efficiency of coal pyrolysis and the quality of pyrolysis gas are improved. When the pressure of any one of the oxygen-rich gas, carbon dioxide, and recycled coal gas is insufficient, the gas supply can be automatically shut down in an emergency to prevent excessive oxygen fire of the equipment caused by continuous gas supply. , explosion problems, and after the gas is cut off, the safety interlock control system 2 controls the nitrogen control valve 2111 to start, automatically connects nitrogen to protect the equipment. At the same time, in order to prevent emergencies, the safety interlock control system 2 is provided with an emergency stop button to ensure that the equipment is safely stopped in an emergency. During the process of nitrogen pipe 211 inputting nitrogen into the carbonization furnace, the nitrogen in the nitrogen pipe 211 will quickly enter the carbonization furnace, which may cause the gas pressure in the carbonization furnace to increase instantly. When the safety interlock control system 2 opens the nitrogen pipe 211 through the data line, the carbonization furnace supports the round tank 212, the round tank 212 supports the round shell 213, and the safety interlock control system 2 starts the round shell 21 3, the shaft of the servo motor 214 starts to reverse, the shaft of the servo motor 214 drives the round rod 215 to reverse, the round rod 215 drives the plate 216 to reverse, the nitrogen input by the nitrogen pipe 211 enters the round tank 212, the plate 216 is in contact with the nitrogen during the rotation, the plate 216 fans the nitrogen, and allows the nitrogen to enter the L-shaped conduit 217 evenly, the L-shaped conduit 217 inputs the uniform nitrogen into the carbonization furnace, preventing a large amount of nitrogen from quickly entering the carbonization furnace when the equipment is in use, thereby avoiding the problem that the internal furnace pressure of the carbonization furnace increases instantly when the automatic control system inputs nitrogen, causing damage to the internal furnace of the carbonization furnace.

[0032] When the rotating shaft of the servo motor 214 drives the round rod 215 to reverse, the round rod 215 drives the disc 221 to reverse, and the round rod 215 drives the rubber ring 222 to reverse. The disc 221 reverses in the ring width plate 223. During the rotation of the rubber ring 222, the rubber ring 222 blocks the nitrogen from flowing out of the gap of the round tank 212, thereby preventing the nitrogen from flowing out of the gap of the round tank 212 when the equipment is in use, thereby avoiding the problem of nitrogen leakage caused by nitrogen flowing out of the gap of the round tank 212 when the automatic control system inputs nitrogen.

[0033] See also Figure 1-Figure 11 On the basis of the above embodiment, another embodiment of the present invention further includes an anti-adhesion device 6 and a purification device 7, wherein the anti-adhesion device 6 is arranged on the right side of the disc 221, and the anti-adhesion device 6 includes two U-shaped frames 61, two thin rods 62, a ring block 63 and two curved plates 64, the two U-shaped frames 61 are respectively fixed on the right side of the disc 221, the two thin rods 62 are respectively fixed on the ends of the two U-shaped frames 61 away from the disc 221, the ring block 63 is fixed on the ends of the two thin rods 62 close to each other, and the ring block 63 is fixed on the ends of the two thin rods 62 close to each other. The inner wall of the block 63 is rotatably connected to the left side of the inner wall of the round tank 212, and the two curved plates 64 are respectively fixed on the sides of the two U-shaped frames 61 that are away from each other. The outer walls of the two curved plates 64 are in sliding contact with the inner wall of the round tank 212, and the U-shaped frame 61 drives the curved plates 64 to reverse. During the rotation of the curved plates 64, the curved plates 64 scrape off the nitrogen residues attached to the wall of the round tank 212, so as to avoid the round tank 212 being easily damaged by aging due to a large amount of nitrogen residues attached to the wall of the round tank 212 when the automatic control system inputs nitrogen.

[0034] The anti-adhesion device 6 also includes four L-shaped rods 65, four straight ring blocks 66 and four sponge pads 67. The four L-shaped rods 65 respectively penetrate and are fixed on both sides of the two U-shaped frames 61 away from each other. The four straight ring blocks 66 are respectively fixed on the outer walls of the four L-shaped rods 65. The four sponge pads 67 are respectively fixed on the outer walls of the four straight ring blocks 66. The outer walls of the four sponge pads 67 are in sliding contact with the inner wall of the round tank 212. The straight ring blocks 66 drive the sponge pads 67 to reverse. During the rotation of the sponge pads 67, the sponge pads 67 wipe the corners of the round tank 212 to avoid a large amount of nitrogen residues attached to the corners of the round tank 212 when the automatic control system inputs nitrogen, causing the internal corners of the round tank 212 to be easily corroded by the nitrogen residues.

[0035] The purification device 7 is provided at one end of the anti-adhesion device 6 close to each other. The purification device 7 includes four L-shaped plates 71, two ring frames 72, two activated carbon discs 73 and four filter screens 74. The four L-shaped plates 71 are respectively fixed to the ends of the four L-shaped rods 65 close to each other, the two ring frames 72 are respectively fixed to the sides of the four L-shaped plates 71 away from each other, the two activated carbon discs 73 are respectively fixed in the middle of the inner walls of the two ring frames 72, the four filter screens 74 are respectively fixed on the inner walls of the two ring frames 72 in pairs, and the four filter screens 74 are respectively located at the two activated carbon discs On the left and right sides of 73, two activated carbon disks 73 are respectively sleeved on both sides of the outer wall of the round rod 215, and four filter screens 74 are respectively sleeved on both sides of the outer wall of the round rod 215. Nitrogen passes through the filter screens 74 and contacts the activated carbon disk 73. The activated carbon disk 73 contacts the nitrogen over a large area during the rotation process. The activated carbon disk 73 filters moisture and impurities in the nitrogen to improve the purity of the nitrogen and avoid the automatic control system from inputting nitrogen. The nitrogen contains a large amount of impurities, which causes the carbonization furnace to have a poor protection effect. The activated carbon disk 73 is provided with a desiccant inside, which can be used to absorb moisture in the nitrogen.

[0036] The purification device 7 also includes four connecting plates 75, eight arc-shaped spring pieces 76 and eight semi-arc blocks 77. The four connecting plates 75 are respectively fixed on one side of the four L-shaped plates 71 close to the two U-shaped frames 61. The eight arc-shaped spring pieces 76 are respectively fixed on the front and back sides of the four connecting plates 75 in groups of two. The eight semi-arc blocks 77 are respectively fixed on one side of each arc-shaped spring piece 76 away from the four connecting plates 75. The outer walls of the eight semi-arc blocks 77 are fixedly connected to the outer walls of the two ring frames 72. The arc-shaped spring pieces 76 drive the semi-arc blocks 77 to reverse. Under the elastic force of the arc-shaped spring pieces 76, the amplitude of the ring frame 72 during rotation is reduced, so as to avoid the ring frame 72 rotating with a strong amplitude when nitrogen is input into the automatic control system, thereby preventing the activated carbon disk 73 in the ring frame 72 from vibrating and being damaged.

[0037] While the round rod 215 drives the disc 221 to reverse, the disc 221 drives the U-shaped frame 61 to reverse, the U-shaped frame 61 drives the thin rod 62 to reverse, the thin rod 62 drives the ring block 63 to reverse, and the ring block 63 reverses in the round tank 212. At the same time, the U-shaped frame 61 drives the curved plate 64 to reverse. During the rotation of the curved plate 64, the curved plate 64 scrapes off the nitrogen residue attached to the wall of the round tank 212 to prevent a large amount of nitrogen residue from being attached to the wall of the round tank 212 when the equipment is in use, thereby avoiding the problem of the round tank 212 being easily aged and damaged due to a large amount of nitrogen residue attached to the wall of the round tank 212 when the automatic control system inputs nitrogen.

[0038] While the disc 221 drives the U-shaped frame 61 to reverse, the U-shaped frame 61 drives the L-shaped rod 65 to reverse, the L-shaped rod 65 drives the straight ring block 66 to reverse, and the straight ring block 66 drives the sponge pad 67 to reverse. During the rotation of the sponge pad 67, the sponge pad 67 wipes the corners of the round tank 212 to prevent a large amount of nitrogen residue from being attached to the corners of the round tank 212 when the equipment is in use, thereby avoiding the problem that a large amount of nitrogen residue is attached to the corners of the round tank 212 when the automatic control system inputs nitrogen, causing the internal corners of the round tank 212 to be easily corroded by the nitrogen residue.

[0039] While the U-shaped frame 61 drives the L-shaped rod 65 to reverse, the L-shaped rod 65 drives the L-shaped plate 71 to reverse, the L-shaped plate 71 drives the ring frame 72 to reverse, the ring frame 72 drives the activated carbon disk 73 to reverse, the ring frame 72 drives the filter 74 to reverse, the nitrogen passes through the filter 74 and contacts the activated carbon disk 73, the activated carbon disk 73 contacts the nitrogen over a large area during the rotation process, the activated carbon disk 73 filters the moisture and impurities in the nitrogen, improves the purity of the nitrogen, and prevents the nitrogen input from the L-shaped conduit 217 to the carbonization furnace when the equipment is in use. The problem of a large amount of impurities in the nitrogen input to the carbonization furnace by the automatic control system is avoided, thereby avoiding the problem that the protection effect of the carbonization furnace is poor due to a large amount of impurities in the nitrogen when the automatic control system inputs nitrogen.

[0040] While the L-shaped rod 65 drives the L-shaped plate 71 to reverse, the L-shaped plate 71 drives the connecting plate 75 to reverse, the connecting plate 75 drives the arc-shaped spring piece 76 to reverse, and the arc-shaped spring piece 76 drives the semi-arc block 77 to reverse. Under the elastic force of the arc-shaped spring piece 76, the amplitude of the ring frame 72 during rotation is reduced, and the ring frame 72 is prevented from rotating with a strong amplitude when the equipment is in use, thereby avoiding the problem of vibration damage to the activated carbon disk 73 in the ring frame 72 caused by the strong amplitude of the rotation of the automatic control system when nitrogen is input.

[0041] See also Figure 1-Figure 11 One embodiment of the present invention is: a control method for oxygen-enriched combustion coal pyrolysis inlet gas, comprising the following steps: Step 1: In order to prevent the return air pressure or return gas pressure from being too low and causing tempering, an interlock control system for the return air pressure and the return gas pressure is set. When the return air pressure or the return gas pressure is lower than the preset interlock value, the DCS system issues a low alarm; when the pressure is lower than the preset interlock value, the DCS system issues a low alarm, interlocks to close the air pipeline switch valve, interlocks to close the gas valve 31, and opens the protective nitrogen control valve 2111 and the cut-off valve at the same time to isolate and protect the fuel and gasifying agent from the gas system, ensuring the safety of system shutdown, and triggering the one-button shutdown system at the same time, and the system stops safely according to the interlock sequence control; Step 2: To prevent emergencies, set an emergency stop button to ensure that the system stops safely in an emergency; Step 3: In order to prevent the pressure of the carbon dioxide pipe 4 from being too low, a pressure interlock system of the carbon dioxide pipe 4 is set. When the return carbon dioxide pressure is less than the preset interlock value, the DCS system issues a low alarm and interlocks and closes the carbonization furnace carbon dioxide valve 41 and the carbon dioxide decompression valve.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic control system for oxygen-enriched combustion coal pyrolysis air intake, characterized in that: The invention comprises an oxygen intake control system, a carbon dioxide intake control system, a coal gas intake control system, a safety interlock control system (2) and a one-touch parking interlock system, wherein the oxygen intake control system, the carbon dioxide intake control system and the coal gas intake control system are all electrically connected to the safety interlock control system (2), the safety interlock control system (2) is used to control the intake state of oxygen, carbon dioxide and coal gas, the one-touch parking interlock system is electrically connected to the safety interlock control system (2), and the one-touch parking interlock system is used to control the safety interlock control system (2) to cut off the intake of oxygen, carbon dioxide and coal gas.

2. The automatic control system for oxygen-enriched combustion coal pyrolysis air intake according to claim 1, characterized in that: The oxygen intake control system comprises an oxygen pipe (5), an oxygen valve (51) and an oxygen analysis module (52); the oxygen valve (51) is mounted on the oxygen pipe (5) and is used to control the delivery of oxygen inside the oxygen pipe (5); the oxygen analysis module (52) is electrically connected to the oxygen valve (51) and is used to control the opening and closing of the oxygen valve (51).

3. The automatic control system for oxygen-enriched combustion coal pyrolysis air intake according to claim 2, characterized in that: The carbon dioxide intake control system comprises a carbon dioxide pipe (4), a carbon dioxide valve (41) and a carbon dioxide analysis module (42); the carbon dioxide valve (41) is mounted on the carbon dioxide pipe (4) and is used to control the delivery of oxygen inside the carbon dioxide pipe (4); the carbon dioxide analysis module (42) is electrically connected to the carbon dioxide valve (41) and is used to control the opening and closing of the carbon dioxide valve (41).

4. The automatic control system for oxygen-enriched combustion coal pyrolysis air intake according to claim 3, characterized in that: The coal gas intake control system comprises a coal gas pipe (3), a coal gas valve (31) and a coal gas analysis module (32); the coal gas valve (31) is installed on the coal gas pipe (3) and is used to control the delivery of oxygen inside the coal gas pipe (3); the coal gas analysis module (32) is electrically connected to the coal gas valve (31) and is used to control the opening and closing of the coal gas valve (31).

5. The automatic control system for oxygen-enriched combustion coal pyrolysis air intake according to claim 4, characterized in that: The safety interlock control system (2) is installed on the top of the integrated board (1), characterized in that: the outlets of the gas pipe (3), the carbon dioxide pipe (4) and the oxygen pipe (5) are all connected to the air inlet burner of the carbonization furnace, and the gas pipe (3), the carbon dioxide pipe (4) and the oxygen pipe (5) are all installed on the top of the integrated board (1), and a gas equalization component (21) is also provided on the top of the integrated board (1); The gas equalization component (21) comprises a nitrogen pipe (211), the nitrogen pipe (211) being fixed to the top surface of the integrated board (1), a nitrogen control valve (2111) being installed on the nitrogen pipe (211), the nitrogen control valve being electrically connected to the safety interlock control system (2), a round tank (212) being fixedly installed at the right end of the nitrogen pipe (211), the bottom surface of the round tank (212) being fixedly connected to the top surface of the integrated board (1), a round shell (213) being fixedly installed in the middle of the left side of the round tank (212), and a servo motor (214) being fixedly installed on the right side of the inner wall of the round shell (213), A round rod (215) is passed through and rotatably installed in the middle of the right side of the round can (212); the left end of the round rod (215) is fixedly connected to the right end of the rotating shaft of the servo motor (214); the right end of the round rod (215) is rotatably connected to the left side of the inner wall of the round can (212); three plates (216) are fixed in the middle of the outer wall of the round rod (215); an L-shaped conduit (217) is passed through and fixed to the bottom of the right side of the round can (212); the outer wall of the L-shaped conduit (217) passes through and is fixed to the top surface of the integrated board (1); and a leakage prevention component (22) is arranged on the left side of the outer wall of the round rod (215).

6. The automatic control system for oxygen-enriched combustion coal pyrolysis gas intake according to claim 5, characterized in that: The anti-leakage component (22) comprises a disc (221), the disc (221) is fixedly mounted on the left side of the outer wall of the round rod (215), a rubber ring (222) is fixed to the left edge of the disc (221), the outer wall of the disc (221) is rotatably connected to the inner wall of the wide ring plate (223), and the wide ring plate (223) is fixed to the right side of the inner wall of the round tank (212); An anti-adhesion device (6) is provided on the right side of the disc (221), and a purification device (7) is provided at one end of the anti-adhesion device (6) close to each other.

7. The automatic control system for oxygen-enriched combustion coal pyrolysis air intake according to claim 6, characterized in that: The gas pipe (3) is located on the left side of the safety interlock control system (2), the carbon dioxide pipe (4) is located in front of the safety interlock control system (2), the oxygen pipe (5) is located in front of the carbon dioxide pipe (4), and the nitrogen pipe (211) is located on the back of the safety interlock control system (2). The safety interlock control system (2) controls each valve through a data line.

8. The automatic control system for oxygen-enriched combustion coal pyrolysis gas intake according to claim 7, characterized in that: The anti-adhesion device (6) comprises two U-shaped frames (61), two thin rods (62), a ring block (63) and two curved plates (64); the two U-shaped frames (61) are respectively fixed to the right side of the disk (221); the two thin rods (62) are respectively fixed to one end of the two U-shaped frames (61) away from the disk (221); the ring block (63) is fixed to one end of the two thin rods (62) close to each other; the inner wall of the ring block (63) is rotatably connected to the left side of the inner wall of the round can (212); the two curved plates (64) are respectively fixed to one side of the two U-shaped frames (61) away from each other; and the outer walls of the two curved plates (64) are in sliding contact with the inner wall of the round can (212); The anti-adhesion device (6) further comprises four L-shaped rods (65), four straight ring blocks (66) and four sponge pads (67); the four L-shaped rods (65) respectively penetrate and are fixed on two sides of the two U-shaped frames (61) which are away from each other; the four straight ring blocks (66) are respectively fixed on the outer walls of the four L-shaped rods (65); the four sponge pads (67) are respectively fixed on the outer walls of the four straight ring blocks (66); and the outer walls of the four sponge pads (67) are in sliding contact with the inner wall of the round can (212).

9. The automatic control system for oxygen-enriched combustion coal pyrolysis gas intake according to claim 8, characterized in that: The purification device (7) comprises four L-shaped plates (71), two ring frames (72), two activated carbon discs (73) and four filter screens (74), the four L-shaped plates (71) are respectively fixed to the ends of the four L-shaped rods (65) close to each other, the two ring frames (72) are respectively fixed to the sides of the four L-shaped plates (71) away from each other, the two activated carbon discs (73) are respectively fixedly mounted in the middle of the inner walls of the two ring frames (72), the four filter screens (74) are respectively fixed to the inner walls of the two ring frames (72) in pairs, and the four filter screens (74) are respectively located on the left and right sides of the two activated carbon discs (73); The purification device (7) further comprises four connecting plates (75), eight arc-shaped spring pieces (76) and eight semi-arc blocks (77), wherein the four connecting plates (75) are respectively fixed to one side of the four L-shaped plates (71) close to the two U-shaped frames (61), the eight arc-shaped spring pieces (76) are respectively fixed to the front and back sides of the four connecting plates (75) in groups of two, the eight semi-arc blocks (77) are respectively fixed to one side of each arc-shaped spring piece (76) away from the four connecting plates (75), and the outer walls of the eight semi-arc blocks (77) are fixedly connected to the outer walls of the two ring frames (72); The two activated carbon discs (73) are respectively sleeved on both sides of the outer wall of the round rod (215), and the four filter screens (74) are respectively sleeved on both sides of the outer wall of the round rod (215).

10. A control method for oxygen-enriched combustion coal pyrolysis air intake, applied to the automatic control system for oxygen-enriched combustion coal pyrolysis air intake according to claim 9, characterized in that: The following steps are involved: Step 1: In order to prevent the return air pressure or return gas pressure from being too low and causing tempering, an interlock control system for the return air pressure and the return gas pressure is set. When the return air pressure or the return gas pressure is lower than the preset interlock value, the DCS system issues a low alarm; when the pressure is lower than the preset interlock value, the DCS system issues a low alarm, interlocks to close the air pipeline switch valve, interlocks to close the gas valve (31), and simultaneously opens the protective nitrogen control valve (2111) and the cut-off valve to isolate and protect the fuel and gasifying agent from the gas system, ensuring the safety of system shutdown, and at the same time triggering the one-button shutdown system, the system stops safely according to the interlock sequence control; Step 2: To prevent emergencies, set an emergency stop button to ensure that the system stops safely in an emergency; Step 3: In order to prevent the pressure of the carbon dioxide pipe (4) from being too low, a pressure interlock system of the carbon dioxide pipe (4) is set. When the pressure of the returned carbon dioxide is lower than the preset interlock value, the DCS system issues a low alarm and interlocks and closes the carbonization furnace carbon dioxide valve (41) and the carbon dioxide decompression valve.

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