Carbon-based oxygen-enriched combustion device for tail gas circulation and method thereof

Abstract

The invention discloses a carbon-based oxygen-enriched combustion device for tail gas circulation and a method thereof, and relates to the technical field of oxygen-enriched combustion. The carbon-based oxygen-enriched combustion device comprises a carbonization furnace, a raw coal feeding port is formed in the top of the carbonization furnace, a pressure release valve is fixedly installed on the top surface of the carbonization furnace, and a raw gas spraying pipe is fixedly installed on the left side of the carbonization furnace; the raw gas nozzle and the combustion-supporting gas nozzle are matched with the swirl vanes, raw gas entering the raw gas nozzle is shunted by the swirl vanes, combustion-supporting gas sprayed out of the combustion-supporting gas nozzle is uniformly mixed with the raw gas, the combustion-supporting gas is uniformly mixed with the raw gas, the combustion-supporting gas is uniformly mixed with the raw gas, and the combustion-supporting gas is uniformly mixed with the raw gas, so that the combustion-supporting gas is uniformly mixed with the raw gas, and the combustion-supporting gas is uniformly mixed. The combustion-supporting gas is prepared by mixing pure oxygen and carbon dioxide, so that the combustion-supporting gas and the raw gas which are uniformly mixed are sprayed out by the nozzle to perform heating carbonization on coal, and the problem that the combustion-supporting gas and the raw gas cannot be uniformly mixed and then are introduced into a carbonization furnace, so that the carbonization effect is poor is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen-enriched combustion, and in particular to a carbon-based oxygen-enriched combustion device for tail gas circulation and a method thereof. Background Art

[0002] At present, the production process of coal pyrolysis in my country mainly adopts internal heating vertical furnace. This process can effectively improve the comprehensive utilization of coal resources and the added value of low-metamorphic coal. It has been listed as one of the effective utilization directions and is currently the largest local coal conversion industry and pillar industry. However, this process uses combustion-supporting gas to assist combustion, and the exhaust gas generated by combustion enters the raw coal gas, which not only reduces the calorific value of the raw coal gas, but also increases the processing capacity of the purification system. In addition, a large amount of low calorific value raw coal gas is produced, and there is a lack of effective utilization methods, which has become an urgent problem to be solved in the current low-temperature distillation. Carbon-based oxygen-enriched combustion is a method that uses high-purity oxygen to replace traditional combustion-supporting gas, and uses high-purity CO2 to replace part of the combustion gas. A process for burning combustion gas. Since traditional combustion gas contains about 78% nitrogen, oxygen and carbon dioxide are used to replace the combustion gas. The mixed gas of oxygen and carbon dioxide is mixed with the low-temperature carbonization raw coal gas (cold raw coal gas after removing tar) produced by the carbonization process to prepare high-temperature circulating gas that meets the requirements of low-temperature carbonization of coal. This can change the problems of low content of effective gas components, high nitrogen content, low calorific value of raw coal gas, large output, and difficulty in comprehensive utilization caused by the carbonization of traditional combustion gas, lay the prerequisite foundation for the comprehensive utilization of the output raw coal gas, and at the same time, through the utilization of CO2, not only the quality of raw coal gas can be improved, but also carbon emissions can be reduced, making contributions to the dual carbon goals.

[0003] Patent No. CN214620680U discloses an environmentally friendly oxygen-enriched combustion device suitable for cement kilns, including a cement kiln body, a fixed frame fixedly connected to the outside of the cement kiln body, a smoke pipe fixedly connected to the right side of the fixed frame, a fan fixedly connected to the bottom of the smoke pipe, a smoke inlet pipe fixedly connected to the output end of the fan, a filter box fixedly connected to the bottom of the smoke inlet pipe, a filter plate fixedly connected to the inside of the filter box, the environmentally friendly oxygen-enriched combustion device suitable for cement kilns is convenient for adding purified liquid to the inside of the water tank through the water outlet pipe to enter the inside of the purification box, and a fan is arranged inside the purification box. When the stirring block rotates, the purified liquid is added to the inside of the purification box through the water outlet pipe. At the same time, the stirring block and the fan are used to accelerate the circulation of raw gas and the purification liquid to be more quickly and fully exerted, thereby achieving the effect of quickly purifying the raw gas and then discharging it through the smoke outlet pipe.

[0004] However, the environmentally friendly oxygen-enriched combustion device of the current cement kiln has the following problems: when the environmentally friendly oxygen-enriched combustion device of the cement kiln is in use, since the coal needs a long time to be carbonized, during the carbonization process, the combustion-supporting gas and the raw coal gas are not easy to mix and burn, which leads to the problem of poor combustion-supporting effect of the carbonization furnace. Therefore, we propose a carbon-based oxygen-enriched combustion device and method for exhaust gas circulation. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a carbon-based oxygen-enriched combustion device for tail gas circulation and a method thereof, 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: a carbon-based oxygen-enriched combustion device for tail gas circulation, comprising a carbonization furnace, a raw coal feed port is arranged on the top of the carbonization furnace, and is characterized in that: a pressure relief valve is fixedly installed on the top surface of the carbonization furnace, a raw gas nozzle is fixedly installed on the left side of the carbonization furnace, an air inlet is provided on the bottom surface of the raw gas nozzle, a nozzle is provided on the right side of the raw gas nozzle, a combustion-supporting gas nozzle is fixed inside the raw gas nozzle, the combustion-supporting gas nozzle is coaxially arranged with the raw gas nozzle, an air inlet is provided on the bottom surface of the combustion-supporting gas nozzle, a swirl blade is fixed on the outer wall of the right end of the combustion-supporting gas nozzle, and the swirl blade is located inside the raw gas nozzle.

[0007] According to the above scheme, a circulation component is arranged on the top surface of the carbonization furnace, and the circulation component includes a tank body, a blower is fixedly installed on the left side of the tank body through an air outlet pipe, and the end of the blower away from the tank body is fixedly connected to the raw gas nozzle through a pipeline and an air intake controller, a spray pipe is fixedly installed on the top of the tank body, an air outlet pipe is fixedly installed on the bottom of the left side of the tank body, a driving module is fixedly installed in the middle of the left side of the tank body, the rotating shaft of the driving module is rotatably installed in the middle of the left side of the tank body, a round rod is fixed on the right side of the rotating shaft of the driving module, and the end of the round rod away from the driving module is fixedly connected to the left side of the inner wall of the tank body, a round shell 1 is fixed on the circumferential surface of the left end of the round rod, and a plurality of openings are opened on the left side of the round shell 1, an electric coke collector is fixedly installed in the middle of the inner wall of the round shell 1, a filter is fixed on the circumferential surface of the right end of the round rod, and a smoke fan component is arranged in the middle of the left side of the filter; The smoke fan assembly includes a ring plate 1, which is fixed in the middle of the left side of the round shell 1. A plurality of strips are fixed on the outer wall of the ring plate 1, and a fan plate is fixed on the outer walls of the plurality of strips respectively. An amplitude device is arranged on the left side of the inner wall of a plurality of the strips, and a dust suppression device is arranged on the left side of the amplitude device.

[0008] According to the above scheme, an outer wall of the circular shell is rotatably connected to the inner wall of the tank body, and a plurality of the fan plates are located in the middle of the tank body.

[0009] According to the above scheme, the amplitude device includes a second ring plate, a ring shell, a plurality of counterweight balls and a ring cover plate. The second ring plate is fixed on the left side of the inner wall of a plurality of strips, the ring shell is fixed on the left side of the outer wall of the second ring plate, a plurality of the counterweight balls are slidably installed on the inner wall of the ring shell, and the ring cover plate is fixed on the left side of the inner wall of the ring shell.

[0010] According to the above scheme, the amplitude device also includes a ring tube, a slip ring, a groove ring and a straight frame, the ring tube is fixed on the outer wall of the ring shell, the ring tube is sleeved on the round rod, the slip ring is fixed on the outer wall of the ring tube, the inner wall of the groove ring is slidably connected to the outer wall of the slip ring, the straight frame is fixed on the bottom surface of the groove ring, and the bottom surface of the straight frame is fixedly connected to the bottom end of the tank body.

[0011] According to the above solution, the inner wall of the annular shell is located on the movement trajectory of a plurality of counterweight balls, and the slip ring is located on the left side of the annular shell.

[0012] According to the above scheme, the dust reduction device includes a circular plate, two electric nozzles, a circular shell 2 and a circular frame. The circular plate is fixed on the left side of the ring tube, the two electric nozzles are fixed on the right side of the circular plate, the circular frame is fixed on the inner bottom end of the tank body, the circular shell 2 is fixed on the top surface of the circular frame, the inner wall of the circular shell 2 is rotatably connected to the outer wall of the circular plate, and the spray pipe is fixedly connected to the top left side of the circular shell 2.

[0013] According to the above scheme, the dust reduction device also includes a connecting ring, three protrusions and three strip fans. The connecting ring is fixed in the middle of the left side of the circular plate, the three protrusions are fixed on the outer wall of the connecting ring, and the three strip fans are respectively embedded in the side of the three protrusions away from each other.

[0014] According to the above solution, the two electric spray heads are respectively located above and below the groove ring, and the connecting ring is located inside the second circular shell.

[0015] A method for using a carbon-based oxygen-enriched combustion device for tail gas circulation comprises the following steps: S1. Placing coal on a raw coal feed port, the coal enters a carbonization furnace through the raw coal feed port, and the carbonization furnace heats and carbonizes the coal; S2. The raw gas entering the raw gas nozzle is diverted by the swirl blades, and the combustion-supporting gas in the combustion-supporting gas nozzle is fully mixed with the raw gas; S3, the fan plate fans the filtered raw gas to make the overall distribution of the raw gas more uniform; S4. The weighted ball rolls in the ring shell and hits the ring shell, causing the ring shell to vibrate, which then transmits the vibration to the fan plate. S5, the groove ring limits the slip ring, and under the action of friction, the ring plate 2 will not vibrate violently when vibrating; S6. The water mist input by the spray pipe will enter the round shell 2, and the electric nozzle will rotate to spray water mist, so that the water mist will contact the raw gas more evenly; S7, the strip fan stirs the water mist in the round shell 2 so that the water mist in the round shell 2 will not be dispersed unevenly; S8. During the rotation process, the electric coke precipitator comes into contact with the raw coal gas over a large area, and the electric coke precipitator captures tar in the raw coal gas.

[0016] The present invention provides a carbon-based oxygen-enriched combustion device for tail gas circulation, which has the following beneficial effects: (1) The present invention uses a raw gas nozzle and a combustion-supporting gas nozzle in conjunction with swirl blades. The raw gas entering the raw gas nozzle is diverted by the swirl blades, so that the combustion-supporting gas and raw gas sprayed from the combustion-supporting gas nozzle are evenly mixed. The combustion-supporting gas is a mixture of oxygen-enriched gas and carbon dioxide. The nozzle sprays evenly mixed combustion-supporting gas and raw gas to heat and carbonize the coal, thereby preventing the combustion-supporting gas and raw gas from being unevenly mixed and then being introduced into the carbonization furnace, thereby causing a poor carbonization effect.

[0017] (2) The present invention comprises a tank body, a blower, a spray pipe, an air outlet pipe, a round rod, a round shell, an electric coke collector, a filter, a smoke fan assembly, a ring plate and a strip plate in conjunction with a fan plate. During the process of the blower exhausting air, the raw gas in the tank body is filtered through the filter, and the electric coke collector contacts the raw gas over a large area during the rotation process. The electric coke collector captures tar in the raw gas to prevent the raw gas from carrying a large amount of particulate matter and tar, which causes poor subsequent combustion-supporting effect. In addition, during the forward rotation of the fan plate, the fan plate fans the filtered raw gas to make the raw gas more evenly distributed, which prevents the uneven distribution of the raw gas from causing poor subsequent combustion-supporting effect.

[0018] (3) The present invention arranges an amplitude device so that the ring plate 2, the ring shell, the weight ball, the ring cover plate, the ring tube, the slip ring and the groove ring cooperate with the straight frame. During the positive rotation of the ring shell, under the action of gravity, the weight ball rolls in the ring shell and hits the ring shell, causing the ring shell to vibrate. The ring shell transmits the vibration to the filter, and the filter screen of the filter vibrates the raw gas dust attached to the surface to prevent the raw gas dust from being attached to the filter screen in large quantities and affecting the filtering effect. The groove ring limits the slip ring. Under the action of friction, the ring plate 2 will not shake violently when vibrating, making the overall vibration more stable, preventing the ring plate 2 from shaking violently when vibrating and causing the equipment to run unsmoothly.

[0019] (4) The present invention arranges a dust suppression device so that the circular plate, the electric nozzle, the second circular shell, the circular frame, the connecting ring and the convex block cooperate with the strip fan. When the water mist is input by the spray pipe, the water mist input by the spray pipe will enter the second circular shell, and the electric nozzle rotates to spray the water mist, so that the water mist contacts the raw gas more evenly, and the dust particles in the raw gas are sprayed to suppress the dust, thereby preventing the water mist from contacting the raw gas unevenly, resulting in poor spray dust suppression effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a partial cross-sectional schematic diagram of the present invention as a whole; Figure 3 For the present invention Figure 2 A partial enlarged schematic diagram of the M in the middle; Figure 4 It is a cross-sectional schematic diagram of the tank body of the present invention; Figure 5 is a cross-sectional schematic diagram of the amplitude device of the present invention; Figure 6 For the present invention Figure 5 A local enlarged schematic diagram of the middle A; Figure 7 It is a cross-sectional schematic diagram of the dust suppression device of the present invention; Figure 8 For the present invention Figure 7 A local enlarged schematic diagram of point B in the middle.

[0021] In the figure: 1, carbonization furnace; 2, raw coal feed port; 3, pressure relief valve; 21, raw coal gas nozzle; 22, combustion-supporting gas nozzle; 23, swirl blade; 31, circulation component; 311, tank; 312, blower; 313, spray pipe; 314, air outlet pipe; 315, drive module; 316, round rod; 317, round shell one; 318, electric coke collector; 319, filter; 32, smoke fan component ; 321, ring plate one; 322, strip plate; 323, fan plate; 4, amplitude device; 41, ring plate two; 42, ring shell; 43, counterweight ball; 44, ring cover plate; 45, ring pipe; 46, slip ring; 47, groove ring; 48, straight frame; 5, dust suppression device; 51, round plate; 52, electric nozzle; 53, round shell two; 54, circular frame; 55, connecting ring; 56, bump; 57, strip fan. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-Figure 8One embodiment of the present invention is: a carbon-based oxygen-enriched combustion device for tail gas circulation, comprising a carbonization furnace 1, a raw coal feed port 2 is arranged on the top of the carbonization furnace 1, a pressure relief valve 3 is fixedly installed on the top surface of the carbonization furnace 1, a flame heater is arranged on the bottom of the front and back sides of the carbonization furnace 1, a raw gas nozzle 21 is fixedly installed on the left side of the carbonization furnace 1, an air inlet is opened on the bottom surface of the raw gas nozzle 21, a nozzle is arranged on the right side of the raw gas nozzle 21, a combustion-supporting gas nozzle 22 is fixed inside the raw gas nozzle 21, and the combustion-supporting gas nozzle 22 is connected to the raw gas nozzle 21. The nozzle 21 is coaxially arranged, and an air inlet is provided on the bottom surface of the combustion-supporting gas nozzle 22. A swirl blade 23 is fixed to the outer wall of the right end of the combustion-supporting gas nozzle 22. The swirl blade 23 is located inside the raw gas nozzle 21. The raw gas entering the raw gas nozzle 21 is diverted by the swirl blade 23, so that the combustion-supporting gas and the raw gas are evenly mixed, so that the nozzle of the raw gas nozzle 21 sprays the evenly mixed combustion-supporting gas and the raw gas to heat up and carbonize the coal, thereby avoiding the combustion-supporting gas and the raw gas not being evenly mixed, which causes poor carbonization effect on the carbonization furnace 1. A circulation component 31 is provided on the top surface of the carbonization furnace 1. The circulation component 31 includes a tank body 311. A blower 312 is fixedly installed on the left side of the tank body 311 through an air outlet pipe 314. The end of the blower 312 away from the tank body 311 is fixedly connected to the raw gas nozzle 21 through a pipeline and an air intake controller. A spray pipe 313 is fixedly installed on the top of the tank body 311. An air outlet pipe 314 is fixedly installed on the bottom of the left side of the tank body 311. A driving module 315 is fixedly installed in the middle of the left side of the tank body 311. The driving module 315 includes a heat dissipation shell and a motor. The heat dissipation shell is fixed in the middle of the left side of the tank body 311. The motor is fixedly installed in the middle of the right side of the heat dissipation shell. The motor shaft of the driving module 315 is rotatably installed in the middle of the left side of the tank body 311. A round rod 316 is fixed on the right side of the motor shaft of the driving module 315. The end of the round rod 316 away from the driving module 315 is fixedly connected to the left side of the inner wall of the tank body 311 A round shell 317 is fixed on the circumferential surface of the left end of the round rod 316, and a plurality of openings are opened on the left side of the round shell 317. An electric coke collector 318 is fixedly installed in the middle of the inner wall of the round shell 317. A filter 319 is fixed on the circumferential surface of the right end of the round rod 316. A smoke fan assembly 32 is arranged in the middle of the left side of the filter 319. The outer wall of the round shell 317 is rotatably connected with the inner wall of the tank body 311. The spray pipe 313 on the tank body 311 inputs water mist, and the water mist and the raw gas are mixed. The outlet pipe 314 and the blower 312 transport the raw gas to the raw gas nozzle 21. The raw gas in the tank body 311 is filtered through the filter 319. The electric coke collector 318 contacts the raw gas over a large area during the rotation process. The electric coke collector 318 captures tar in the raw gas, and allows the purified raw gas to mix with the combustion-supporting gas, so as to avoid the poor combustion-supporting effect of the carbon-based oxygen-rich gas caused by the raw gas carrying a large amount of particulate matter and mixing with the oxygen-rich gas. A smoke fan assembly 32 is arranged in the middle of the left side of the circular shell 317, and the smoke fan assembly 32 includes a ring plate 321, and the ring plate 321 is fixed in the middle of the left side of the circular shell 317. A plurality of strips 322 are fixed on the outer wall of the ring plate 321, and fan plates 323 are respectively fixed on the outer walls of the strips 322. The plurality of fan plates 323 are located in the middle of the tank body 311. During the forward rotation of the fan plate 323, the fan plate 323 fans the filtered raw gas to mix it evenly with the water mist, so that the raw gas and the water mist are mixed more evenly, thereby avoiding the uneven mixing of the raw gas and the water mist causing poor spray dust reduction effect.

[0024] During use, since the coal needs a long time to be carbonized, during the carbonization process, the combustion-supporting gas and the raw coal gas are not easy to mix and burn. The staff places the coal on the raw coal feed port 2, and the coal enters the carbonization furnace 1 through the raw coal feed port 2. At the same time, the carbonization furnace 1 supports the raw coal gas nozzle 21, and the combustion-supporting gas is input at the air inlet of the combustion-supporting gas nozzle 22. The raw coal gas in the tank body 311 enters the air inlet of the raw coal gas nozzle 21. The raw coal gas entering the raw coal gas nozzle 21 is diverted by the swirl blades 23, so that the combustion-supporting gas and the raw coal gas are evenly mixed, so that the nozzle of the raw coal gas nozzle 21 sprays out the evenly mixed combustion-supporting gas and raw coal gas, and the combustion-supporting gas and the raw coal gas are mixed and sprayed into the fire channel to heat up the coal and carbonize it, so as to prevent the combustion of the carbonization furnace 1 due to the combustion-supporting gas and the raw coal gas not being evenly mixed when the equipment is in use, and to prevent the combustion-supporting gas and the raw coal gas not being evenly mixed and then entering the carbonization furnace 1, thereby causing the problem of poor carbonization effect.

[0025] Since there will be a large amount of particulate matter in the raw gas generated when coal is heated, the circulating raw gas will circulate the particles back to the carbonization furnace 1. The carbonization furnace 1 supports the tank body 311. The staff starts the blower 312 on the tank body 311. The wing fan in the blower 312 starts to rotate forward. The wing fan of the blower 312 rotates to extract the raw gas in the carbonization furnace 1. The blower 312 transports the raw gas into the tank body 311. The staff inputs a little water mist into the spray pipe 313 on the tank body 311. The water mist and the raw gas are mixed, and the solid particles in the raw gas are settled by the water mist. The outlet pipe 314 transports the raw gas to the blower 312. The blower 312 transports the raw gas to the carbonization furnace 1 again, forming a circulating raw gas in the tank body 311. At the same time, the staff starts the drive on the tank body 311. The moving module 315, the motor shaft in the driving module 315 starts to rotate forward, the motor shaft drives the round rod 316 to rotate forward, the round rod 316 rotates forward in the tank body 311, the round rod 316 drives the round shell 317 to rotate forward, the round shell 317 drives the electric coke collector 318 to rotate forward, the round rod 316 drives the filter 319 to rotate forward, during the process of the blower 312 exhausting air, the raw gas in the tank body 311 is filtered through the filter 319, the electric coke collector 318 contacts the raw gas over a large area during the rotation, the electric coke collector 318 captures the tar in the raw gas, and allows the purified raw gas to mix with the combustion-supporting gas, to prevent the raw gas from carrying a large amount of particulate matter and mixing with the combustion-supporting gas when the equipment is in use, thereby avoiding the problem of poor combustion-supporting effect caused by the raw gas carrying a large amount of particulate matter and mixing with the combustion-supporting gas.

[0026] While the round rod 316 drives the round shell 317 to rotate forward, the round shell 317 drives the ring plate 321 to rotate forward, the ring plate 321 drives the strip plate 322 to rotate forward, and the strip plate 322 drives the fan plate 323 to rotate forward. During the forward rotation of the fan plate 323, the raw coal gas filtered by the electric coke collector 318 comes into contact with the rotating fan plate 323, and the fan plate 323 fans the raw coal gas and water mist to mix evenly, making the raw coal gas and water mist mixed more evenly, preventing uneven mixing of the raw coal gas and water mist when the equipment is in use, thereby avoiding the problem of poor combustion effect caused by uneven mixing of the raw coal gas and water mist.

[0027] When the raw gas circulates in the tank body 311, when the gas pressure in the tank body 311 is too high, or the gas-liquid level in the tank body 311 is too high, the pressure relief valve 3 will automatically open to release the pressure, allowing the waste gas in the tank body 311 to be discharged, thereby improving the combustion efficiency of the tank body 311.

[0028] See also Figure 1-Figure 8On the basis of the above embodiment, another embodiment of the present invention further includes an amplitude device 4 and a dust suppression device 5, wherein the amplitude device 4 is arranged on the left side of the inner wall of the plurality of strips 322, and the amplitude device 4 includes a second ring plate 41, a ring shell 42, a plurality of weighted balls 43 and a ring cover plate 44, the second ring plate 41 is fixed to the left side of the inner wall of the plurality of strips 322, the ring shell 42 is fixed to the left side of the outer wall of the second ring plate 41, the plurality of weighted balls 43 are slidably mounted on the inner wall of the ring shell 42, and the ring cover plate 44 is fixed inside the ring shell 42. On the left side of the wall, the inner wall of the annular shell 42 is on the movement trajectory of several counterweight balls 43. During the forward rotation of the annular shell 42, under the action of gravity, the counterweight balls 43 roll in the annular shell 42, and the counterweight balls 43 will hit the annular shell 42, causing the annular shell 42 to vibrate. The annular shell 42 transmits the vibration to the filter 319, and the filter 319 vibrates the raw gas dust attached to the surface to avoid the raw gas dust from being attached to the filter 319 in large quantities during filtering, resulting in poor use effect of the filter 319.

[0029] The amplitude device 4 also includes a ring tube 45, a slip ring 46, a groove ring 47 and a straight frame 48. The ring tube 45 is fixed on the outer wall of the ring shell 42, and the ring tube 45 is sleeved on the round rod 316. The slip ring 46 is fixed on the outer wall of the ring tube 45. The inner wall of the groove ring 47 is slidably connected to the outer wall of the slip ring 46. The straight frame 48 is fixed to the bottom surface of the groove ring 47. The bottom surface of the straight frame 48 is fixedly connected to the bottom end of the tank body 311. The slip ring 46 is located on the left side of the ring shell 42. The groove ring 47 limits the slip ring 46. Under the action of friction, the ring plate 2 41 will not shake violently during vibration, thereby avoiding the ring plate 2 41 from shaking violently during vibration and causing the equipment to run unsmoothly.

[0030] A dust suppression device 5 is arranged on the left side of the amplitude device 4, and the dust suppression device 5 comprises a circular plate 51, two electric nozzles 52, a second circular shell 53 and a circular frame 54. The circular plate 51 is fixed on the left side of the ring tube 45, the two electric nozzles 52 are fixed on the right side of the circular plate 51, the circular frame 54 is fixed on the inner bottom end of the tank body 311, the second circular shell 53 is fixed on the top surface of the circular frame 54, the inner wall of the second circular shell 53 is rotatably connected to the outer wall of the circular plate 51, the spray pipe 313 is fixedly connected to the top left side of the second circular shell 53, the two electric nozzles 52 are respectively located above and below the groove ring 47, when the spray pipe 313 inputs water mist, the water mist input by the spray pipe 313 will enter the second circular shell 53, and the electric nozzle 52 rotates to spray water mist, so that the water mist contacts with the raw coal gas more evenly, so as to avoid the poor spray dust suppression effect caused by the uneven contact of the water mist with the raw coal gas when the carbon-based oxygen-enriched combustion device is circulated.

[0031] The dust suppression device 5 also includes a connecting ring 55, three protrusions 56 and three strip fans 57. The connecting ring 55 is fixed in the middle of the left side of the circular plate 51, the three protrusions 56 are fixed on the outer wall of the connecting ring 55, and the three strip fans 57 are respectively embedded in the sides of the three protrusions 56 that are away from each other. The connecting ring 55 is located inside the circular shell 2 53. During the forward rotation of the strip fan 57, the strip fan 57 stirs the water mist in the circular shell 2 53 so that the water mist in the circular shell 53 will not be dispersed unevenly, thereby avoiding the uneven dispersion of the water mist in the circular shell 53 causing the electric nozzle 52 to have a poor spray effect.

[0032] A method for using a carbon-based oxygen-enriched combustion device for tail gas circulation comprises the following steps: S1, placing coal on the raw coal feed port 2, the coal enters the carbonization furnace 1 through the raw coal feed port 2, and the carbonization furnace 1 heats and carbonizes the coal; S2, the raw gas entering the raw gas nozzle 21 is diverted by the swirl blades 23, and the combustion-supporting gas in the combustion-supporting gas nozzle 22 is fully mixed with the raw gas; S3, the fan plate 323 fans the filtered raw gas to make the raw gas more evenly distributed; S4, the weighted ball 43 rolls in the annular shell 42, and the weighted ball 43 hits the annular shell 42, causing the annular shell 42 to vibrate, and the annular shell 42 transmits the vibration to the fan plate 323; S5, the groove ring 47 limits the slip ring 46, and under the action of friction, the ring plate 41 will not vibrate violently when vibrating; S6. The water mist input by the spray pipe 313 will enter the round shell 2 53, and the electric spray head 52 will rotate to spray the water mist, so that the water mist will contact the raw gas more evenly; S7, the strip fan 57 stirs the water mist in the round shell 53 so that the water mist in the round shell 53 will not be dispersed unevenly; S8. The electric coke collector 318 contacts the raw gas over a large area during the rotation process, and the electric coke collector 318 captures tar in the raw gas.

[0033] Since a small amount of smoke particles in the raw gas will overflow from the filter 319, while the ring plate 1 321 drives the strip plate 322 to rotate forward, the strip plate 322 drives the ring plate 2 41 to rotate forward, the ring plate 2 41 drives the ring shell 42 to rotate forward, the ring shell 42 drives the counterweight ball 43 to rotate forward, and the ring shell 42 drives the ring cover plate 44 to rotate forward. During the forward rotation of the ring shell 42, under the action of gravity, the counterweight ball 43 rolls in the ring shell 42, and the counterweight ball 43 will hit the ring shell 42, causing the ring shell 42 to vibrate. The ring shell 42 transmits the vibration to the ring plate 2 41, the ring plate 2 41 transmits the vibration to the strip plate 322, and the strip plate 322 transmits the vibration to the filter 319. The filter 319 vibrates the raw gas dust attached to the surface to prevent the raw gas dust from being attached to the filter 319 in large quantities when the equipment is in use, thereby avoiding the problem that the raw gas dust is attached to the filter 319 in large quantities and the filtering effect of the filter 319 is poor.

[0034] While the ring plate 41 drives the ring shell 42 to rotate forward, the ring shell 42 drives the ring tube 45 to rotate forward, and the ring tube 45 drives the slip ring 46 to rotate forward. At the same time, the tank body 311 supports the straight frame 48, and the straight frame 48 supports the groove ring 47. The slip ring 46 rotates forward in the groove ring 47, so that the groove ring 47 limits the slip ring 46. Under the action of friction, the ring plate 41 will not shake violently when vibrating, preventing the ring plate 41 from shaking violently when the equipment is in use, thereby avoiding the problem of the equipment running not smooth due to the violent shaking of the ring plate 41 when vibrating.

[0035] While the annular shell 42 drives the annular tube 45 to rotate forward, the annular tube 45 drives the circular plate 51 to rotate forward, and the circular plate 51 drives the electric nozzle 52 to rotate forward. At the same time, the tank body 311 supports the circular frame 54, the circular frame 54 supports the circular shell 2 53, and the circular plate 51 rotates forward in the circular shell 2 53. When the spray pipe 313 inputs water mist, the water mist input by the spray pipe 313 will enter the circular shell 2 53. The staff starts the electric nozzle 52 to make the electric nozzle 52 rotate to spray water mist, so that the water mist contacts the raw gas more evenly, preventing the water mist from contacting the raw gas unevenly when the equipment is in use, thereby avoiding the problem of poor spray dust reduction effect caused by uneven contact between the water mist and the raw gas.

[0036] While the annular tube 45 drives the circular plate 51 to rotate forward, the circular plate 51 drives the connecting ring 55 to rotate forward, the connecting ring 55 drives the protrusion 56 to rotate forward, and the protrusion 56 drives the strip fan 57 to rotate forward. During the forward rotation of the strip fan 57, the strip fan 57 stirs the water mist in the circular shell 53 to prevent the water mist in the circular shell 53 from being unevenly dispersed, thereby preventing the water mist in the circular shell 53 from being unevenly dispersed when the equipment is in use, thereby avoiding the problem of poor spray effect of the electric sprinkler 52 caused by the uneven dispersion of the water mist in the circular shell 53.

[0037] CO2 is connected before the air-oxygen mixer of the carbonization furnace, and the combustion-supporting gas entering the furnace is gradually replaced by CO2 under oxygen-rich conditions according to the test plan. The specific process is that the CO2 generated by the tail gas washing tower enters the combustion-supporting gas pipeline through the carbon dioxide transportation pipeline, and enters the burner of the carbonization furnace after being evenly mixed with the combustion-supporting gas and oxygen, and then enters the combustion layer of the carbonization furnace after being evenly mixed with the returned raw coal gas in the burner and the fire channel. The raw coal gas and oxygen undergo combustion reaction in the combustion layer, generating a large amount of heat and high-temperature raw coal gas to carry out low-temperature dry distillation of the coal in the upper dry distillation layer, thereby generating a large amount of raw coal gas, gaseous tar, and lignite. The raw coal gas is then purified to obtain a large amount of coal tar and high-quality raw coal gas.

[0038] See also Figure 1-Figure 8 , based on the above embodiment, in another embodiment of the present invention: The CO2 produced in the tail gas scrubber enters the combustion-supporting gas pipeline through the carbon dioxide transport pipeline and mixes with oxygen before entering the inner tube of the burner. Under oxygen-rich conditions, the combustion-supporting gas entering the furnace is gradually replaced by CO2 according to the test plan.

[0039] The specific plan is: three stages: dry distillation in air, dry distillation in oxygen + air, and dry distillation in oxygen + CO2.

[0040] 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. A carbon-based oxygen-enriched combustion device for tail gas circulation, comprising a carbonization furnace (1), wherein a raw coal feed port (2) is provided at the top of the carbonization furnace (1), characterized in that: A pressure relief valve (3) is fixedly mounted on the top surface of the carbonization furnace (1); a raw gas nozzle (21) is fixedly mounted on the left side of the carbonization furnace (1); an air inlet is provided on the bottom surface of the raw gas nozzle (21); a nozzle is provided on the right side of the raw gas nozzle (21); a combustion-supporting gas nozzle (22) is fixed inside the raw gas nozzle (21); the combustion-supporting gas nozzle (22) is coaxially arranged with the raw gas nozzle (21); an air inlet is provided on the bottom surface of the combustion-supporting gas nozzle (22); a swirl blade (23) is fixed on the outer wall of the right end of the combustion-supporting gas nozzle (22); and the swirl blade (23) is located inside the raw gas nozzle (21).

2. A carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 1, characterized in that: The top surface of the carbonization furnace (1) is provided with a circulation assembly (31), the circulation assembly (31) comprising a tank body (311), a blower (312) being fixedly mounted on the left side of the tank body (311) via an air outlet pipe (314), the end of the blower (312) away from the tank body (311) being fixedly connected to a raw coal gas nozzle (21) via a pipeline and an air intake controller, a spray pipe (313) being fixedly mounted on the top of the tank body (311), an air outlet pipe (314) being fixedly mounted on the bottom of the left side of the tank body (311), a drive module (315) being fixedly mounted in the middle of the left side of the tank body (311), the drive module (315) The rotating shaft is rotatably mounted in the middle of the left side of the tank body (311); a round rod (316) is fixed to the right side of the rotating shaft of the driving module (315); one end of the round rod (316) away from the driving module (315) is fixedly connected to the left side of the inner wall of the tank body (311); a round shell (317) is fixed to the circumferential surface of the left end of the round rod (316); a plurality of openings are opened on the left side of the round shell (317); an electric coke collector (318) is fixedly mounted in the middle of the inner wall of the round shell (317); a filter (319) is fixed to the circumferential surface of the right end of the round rod (316); and a smoke fan assembly (32) is arranged in the middle of the left side of the filter (319); The smoke fan assembly (32) comprises a ring plate (321), the ring plate (321) being fixed in the middle of the left side of the round shell (317), a plurality of strips (322) being fixed to the outer wall of the ring plate (321), and a fan plate (323) being fixed to the outer walls of the plurality of strips (322); An amplitude device (4) is arranged on the left side of the inner wall of the plurality of strips (322), and a dust suppression device (5) is arranged on the left side of the amplitude device (4).

3. A carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 2, characterized in that: The outer wall of the circular shell (317) is rotatably connected to the inner wall of the tank body (311), and the plurality of fan plates (323) are located in the middle of the tank body (311).

4. A carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 3, characterized in that: The amplitude device (4) comprises a second ring plate (41), a ring shell (42), a plurality of weighted balls (43) and a ring cover plate (44); the second ring plate (41) is fixed to the left side of the inner wall of the plurality of strip plates (322); the ring shell (42) is fixed to the left side of the outer wall of the second ring plate (41); the plurality of weighted balls (43) are slidably mounted on the inner wall of the ring shell (42); and the ring cover plate (44) is fixed to the left side of the inner wall of the ring shell (42).

5. A carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 4, characterized in that: The amplitude device (4) further comprises an annular tube (45), a slip ring (46), a groove ring (47) and a straight frame (48); the annular tube (45) is fixed on the outer wall of the annular shell (42); the annular tube (45) is sleeved on the round rod (316); the slip ring (46) is fixed on the outer wall of the annular tube (45); the inner wall of the groove ring (47) is slidably connected to the outer wall of the slip ring (46); the straight frame (48) is fixed on the bottom surface of the groove ring (47); and the bottom surface of the straight frame (48) is fixedly connected to the bottom end of the tank body (311).

6. A carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 5, characterized in that: The inner wall of the annular shell (42) is located on the movement trajectory of the plurality of weighted balls (43), and the slip ring (46) is located on the left side of the annular shell (42).

7. A carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 6, characterized in that: The dust suppression device (5) comprises a circular plate (51), two electric spray heads (52), a second circular shell (53) and a circular frame (54); the circular plate (51) is fixed to the left side of the annular tube (45); the two electric spray heads (52) are fixed to the right side of the circular plate (51); the circular frame (54) is fixed to the inner bottom end of the tank body (311); the second circular shell (53) is fixed to the top surface of the circular frame (54); the inner wall of the second circular shell (53) is rotatably connected to the outer wall of the circular plate (51); and the spray pipe (313) is fixedly connected to the top of the left side of the second circular shell (53).

8. A carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 7, characterized in that: The dust suppression device (5) further comprises a connecting ring (55), three protrusions (56) and three strip fans (57); the connecting ring (55) is fixed in the middle of the left side of the circular plate (51); the three protrusions (56) are fixed on the outer wall of the connecting ring (55); the three strip fans (57) are respectively embedded on the sides of the three protrusions (56) that are away from each other; the two electric spray heads (52) are respectively located above and below the groove ring (47); and the connecting ring (55) is located inside the second circular shell (53).

9. A method for using a carbon-based oxygen-enriched combustion device for tail gas circulation, using the carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 8, characterized in that: The following steps are involved: S1, placing coal on a raw coal feed port (2), the coal entering the carbonization furnace (1) through the raw coal feed port (2), and the carbonization furnace (1) heating and carbonizing the coal; S2, the raw coal gas entering the raw coal gas nozzle (21) is diverted by the swirl blades (23), and the combustion-supporting gas in the combustion-supporting gas nozzle (22) is fully mixed with the raw coal gas; S3, the fan plate (323) fans the filtered raw gas to make the raw gas more evenly distributed; S4, the weighted ball (43) rolls in the annular shell (42), and the weighted ball (43) hits the annular shell (42), causing the annular shell (42) to vibrate, and the annular shell (42) transmits the vibration to the fan plate (323); S5, the groove ring (47) limits the slip ring (46), so that under the action of friction, the second ring plate (41) will not vibrate violently when vibrating; S6. The water mist inputted by the spray pipe (313) enters the second round shell (53), and the electric spray head (52) rotates to spray the water mist, so that the water mist contacts the raw gas more evenly; S7, the strip fan (57) stirs the water mist in the second circular shell (53) so that the water mist in the second circular shell (53) will not be dispersed unevenly; S8. The electric coke collector (318) contacts the raw coal gas over a large area during the rotation process, and the electric coke collector (318) captures tar in the raw coal gas.

10. A burner, used in the carbon-based oxygen-enriched combustion device for tail gas circulation according to claim 1, characterized in that: The burner is composed of a raw gas nozzle (21), a combustion-supporting gas nozzle (22) and a swirl blade (23), and the burner is used for supplying raw gas and combustion-supporting gas for carbon-based oxygen-enriched combustion.

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