A device for recycling tail gas discharged from semi-coke production

Abstract

The present invention relates to the technical field of heat exchange devices, and in particular to a device for recycling exhaust gas emitted from the production of lignite, which solves the problems in the prior art of low recycling rate of exhaust gas emitted from the production of lignite, serious environmental pollution, and insufficient utilization of combustible gas and waste heat. A device for recycling exhaust gas emitted from the production of lignite, including a mounting frame, which serves as a supporting structure for the entire system, and is loaded with a combustion component, a smoke filter component, a heat exchange component, a particulate purification component, and an exhaust component, to ensure that each component closely cooperates and operates efficiently. The present invention effectively improves the combustion efficiency of combustible gases in the exhaust gas and the recycling rate of waste heat through multi-stage purification and heat exchange treatment, reduces the emission of harmful substances, and at the same time ensures the cleanliness of the exhaust gas and the final emission quality, thereby achieving efficient and environmentally friendly utilization of the exhaust gas and promoting the green and sustainable development of the lignite industry.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange devices, and in particular to a device for recovering and utilizing tail gas emitted from the production of semi-coke. Background Art

[0002] The production process of semi-coke is often accompanied by the generation of a large amount of tail gas, which usually includes combustible gases such as carbon monoxide, hydrogen, and methane with high calorific value, as well as impurities such as sulfur dioxide, sulfide, tar, naphthalene, and dust that are likely to cause environmental pollution.

[0003] Taking into account the above-mentioned components of exhaust gas, the existing technology has introduced an advanced exhaust gas purification and recycling system, which first purifies impurities such as sulfur dioxide, sulfide, tar, naphthalene and dust through a multi-stage purification process to achieve the treatment of impurities in the exhaust gas. After that, the combustible gas and the heat energy carried by the combustible gas are recovered through the condensation and compression process to achieve the recovery of resources.

[0004] However, there is still a certain amount of high calorific value combustible gas remaining in the exhaust gas after being treated by the above-mentioned exhaust gas purification and recycling system. These combustible gases that are not effectively utilized not only lead to a decrease in the energy recovery rate, but also affect the subsequent exhaust gas purification efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a device for recycling exhaust gas discharged from the production of semi-coke, which solves the problem that when the exhaust gas purification and recycling system in the prior art processes the exhaust gas, combustible gas still remains in the exhaust gas and is not fully utilized.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for recovering and utilizing tail gas emitted from the production of semi-coke, comprising a mounting frame provided with a supporting baffle, wherein the supporting baffle divides the mounting frame into a first mounting chamber and a second mounting chamber arranged from bottom to top; a gas collecting cylinder is arranged outside the mounting frame; a combustion assembly is mounted in the first mounting chamber, wherein the combustion assembly comprises a shunt pre-combustion section and a rectifier combustion section which are connected to each other; the shunt pre-combustion section is connected to the gas collecting cylinder; a smoke filter assembly comprises a smoke filter tank, a cylinder body and a central cylinder, wherein the smoke filter tank is arranged in the first mounting chamber, the cylinder body is arranged in the second mounting chamber, the central cylinder is connected between the smoke filter tank and the cylinder body; the cylinder body is connected to the rectifier combustion section through a negative pressure pipeline; a heat exchange assembly is arranged in the second mounting chamber, wherein the heat exchange assembly comprises a heat exchange cylinder and a plurality of heat exchange pipelines arranged inside the heat exchange cylinder, wherein one end of the heat exchange cylinder is connected to the smoke filter tank, the top of the heat exchange cylinder is connected to a liquid inlet pipeline, and the bottom is connected to a liquid discharge pipeline; A particle purification component is arranged on the top of the mounting frame and is communicated with the other end of the heat exchange cylinder; an exhaust component is arranged on the top of the mounting frame and is communicated with the particle purification component.

[0008] Preferably, the rectifying combustion section includes a combustion tube, and the diverting pre-combustion section includes an isolation chamber, which is connected to one end of the combustion tube, and a connecting hood is provided at the end of the isolation chamber close to the gas collecting tube; both sides of the bottom of the combustion tube are connected to the bottom support baffle through side support frames, and a burner installed on the top of the bottom support baffle is provided at the bottom center of the combustion tube, a top output end is provided at the top center of the burner, and a side output end is provided on one side; one side of the connecting hood is connected to the interior of the gas collecting tube through an air inlet pipe, and the other side is fixedly connected with a mounting circular plate by bolts, and a plurality of symmetrically arranged preheating tubes are provided inside the isolation chamber, one end of the preheating tube is connected to the interior of the combustion tube, and the other end passes through the mounting circular plate and is connected to the interior of the connecting hood, and a mounting groove is provided on one side of each of the preheating tubes.

[0009] Preferably, the top of the top output end is connected to the interior of the combustion tube through a plurality of combustion tubes, one side of the side output end is connected to an output tube through a combustion tube, the output tube is arranged in the middle position of a plurality of preheating tubes, the interior of each of the installation slots is connected to a combustion diversion tube, each of the combustion diversion tubes is connected to the interior of the output tube through a tube body, and the end of the combustion tube away from the isolation chamber is connected to a connecting tube.

[0010] Preferably, a plurality of mounting grooves are provided on one side of the mounting circular plate, and one end of each of the preheating tubes is connected to a conical air inlet hood, one end of the conical air inlet hood is fixedly connected to the inner wall bolts of the mounting groove, the size of the conical air inlet hood close to one end of the mounting circular plate is larger than the size of the other end, and a support frame is fixedly connected to the bottom of the isolation chamber.

[0011] Preferably, an electric flow regulating valve is installed at one end of each preheating tube, an electric cut-off valve is installed at one end of the air intake pipe, a flame monitoring system is installed inside the combustion tube, and the fire line monitoring system is electrically connected to the electric cut-off valve and the combustion tube.

[0012] Preferably, the negative pressure pipeline includes a branch pipe connected to the bottom of one side of the cylinder body, and a one-way valve is installed at the other end of the branch pipe; a rotating rod with one end penetrating the top cover and extending to the inside of the smoke filter tank is provided inside the central cylinder, and a plurality of connecting frames are threadedly connected on the outer circular surface of one end of the rotating rod located inside the smoke filter tank, and smoke filter plates are connected to the two sides of the inner part of the connecting frame, and a spiral slide is provided on a section of the outer circular surface of the rotating rod; the bottom bolt of the cylinder body is fixedly connected to the bottom cover, and the top of the bottom cover is connected to a piston matching the inner cavity of the cylinder body through a supporting spring, and a round rod with one end penetrating the bottom cover through a sliding sleeve is fixedly connected on both sides of the bottom of the piston, and a linkage ring matching the rotating rod is connected to the bottom of the round rod, and an arc-shaped sliding block matching the spiral slide is fixedly connected to the inner arc surface of the linkage ring.

[0013] Preferably, both ends of the heat exchange cylinder are connected to a connecting cylinder, and a plurality of heat exchange pipelines are arranged in a circumferential array along the circumferential direction of the heat exchange cylinder; the heat exchange pipeline includes two heat exchange tubes and a compression tube, and the ends of the two heat exchange tubes that are far away from each other are respectively connected to the interior of the adjacent connecting cylinder, and the ends that are close to each other are both connected to the interior of the compression tube;

[0014] The ends of the two connecting tubes away from each other are connected with transmission pipes, wherein the end of one transmission pipe away from the connecting tube is connected to the smoke filter tank, and the other transmission pipe is connected to one end of the particle purification bin.

[0015] Preferably, the bottom of the supporting partition at the top is fixedly connected with a lifting rod, one side of the bottom of the lifting rod is bolted fixedly connected with two lifting rings sleeved with the outer ring of the heat exchange cylinder, and the other side of the top is bolted fixedly connected with a stabilizing ring sleeved with the outer ring of the cylinder body.

[0016] Preferably, the exhaust assembly includes a chimney and an induced draft fan fixedly mounted on the top of the mounting frame, the output end of the induced draft fan is connected to the interior of the chimney, and protective covers are provided on both sides of the two mounting chambers, and ventilation grooves are provided on the outer surface of the protective covers.

[0017] Preferably, the particle purification assembly includes a particle purification bin installed on the top of the mounting frame, a plurality of transverse tubes are arranged on the top of the particle purification bin, the plurality of transverse tubes are connected to each other through a central tube, a liquid delivery pipe connected to a water supply device is connected to one side of the top of the central tube, two spray pipes with one end passing through the top of the particle purification bin are connected to the bottom of each of the transverse tubes, a nozzle is connected to the bottom end of the spray pipe, an inclined guide plate is connected to the bottom of the inner cavity of the particle purification bin, a drainage channel is connected to one side of the particle purification bin, one end of the drainage channel extends to the bottom position of one side of the mounting frame and is connected to the wastewater filtration structure, and the other end of the particle purification bin is connected to the inside of the chimney through an exhaust pipe.

[0018] The present invention has the following beneficial effects:

[0019] Through the close cooperation between the gas collecting cylinder and the combustion assembly, the combustible gas in the exhaust gas can be quickly captured and efficiently burned, thereby greatly reducing the direct emission of these harmful gases. This process not only reduces environmental pollution, but also effectively improves energy utilization efficiency, achieving the dual goals of exhaust gas treatment and energy recovery.

[0020] The smoke filter assembly uses the high flow rate of the exhaust gas to generate negative pressure drive, and no additional power source is required to achieve efficient filtration of smoke. This design not only ensures the cleanliness of the exhaust gas and provides favorable conditions for subsequent treatment, but also significantly reduces energy consumption and improves the overall economic efficiency of operation.

[0021] Through the ingenious setting of the heat exchange component and the particulate purification component, the exhaust waste heat recovery and further removal of particulate matter are achieved. The heat exchange component recovers the waste heat in the exhaust gas through heat exchange, improves energy utilization efficiency and reduces energy consumption. The particulate purification component is the last step in the exhaust treatment process, ensuring that the final exhaust emission quality meets environmental protection standards.

[0022] In summary, this lignite production exhaust gas recovery and utilization device has performed well in environmental protection, energy consumption control, energy recovery and exhaust gas treatment, providing strong support for the green development of the lignite production industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2This is a schematic diagram of the disassembly structure of the protective cover of the present invention;

[0026] Figure 3 A schematic diagram of the internal structure details of the installation frame of the present invention;

[0027] Figure 4 A schematic diagram of the detailed structure of the other side of the installation frame of the present invention;

[0028] Figure 5 The present invention is a schematic diagram of the combustion tube and isolation chamber position structure;

[0029] Figure 6 The present invention is a schematic diagram of the structure of the conical air inlet hood, preheating pipe and connecting pipe;

[0030] Figure 7 The present invention is a schematic diagram of the preheating tube and the installation notch structure;

[0031] Figure 8 The output pipe and the combustion shunt pipe structure schematic diagram of the present invention;

[0032] Fig. 9 A schematic diagram of the cylinder body and smoke filter tank structure of the present invention;

[0033] Fig.10 The present invention is a schematic diagram of the linkage ring, cylinder, support spring and round rod structure;

[0034] Fig.11 A schematic diagram of the structure of the rotating rod and the spiral slideway of the present invention;

[0035] Fig.12 Schematic diagram of the heat exchange tube, connecting tube and transmission tube structure of the present invention;

[0036] Fig.13 Schematic diagram of the heat exchange tube and compression tube structure of the present invention;

[0037] Fig.14 A schematic diagram of the structure of the lifting ring and the stabilizing ring of the present invention;

[0038] Fig.15 It is a schematic diagram of the particle purification chamber and chimney structure of the present invention.

[0039] In the figure: 1. installation frame; 2. induced draft fan; 3. chimney; 4. gas collecting cylinder; 5. protective cover; 6. smoke filter tank; 7. particle purification chamber; 8. supporting partition; 9. combustion cylinder; 10. burner; 11. heat exchange cylinder; 12. electric shut-off valve; 13. isolation chamber; 14. connecting cover; 15. conical air inlet cover; 16. combustion diverter pipe; 17. preheating pipe; 18. connecting pipe; 19. electric flow regulating valve; 20. installation notch; 21. output pipe; 22. side output end; 23. top output end; 24. top 1. Top cover; 25. Central cylinder; 26. Cylinder body; 27. One-way valve; 28. Branch pipe; 29. ​​Linkage ring; 30. Bottom cover; 31. Round rod; 32. Piston; 33. Support spring; 34. Arc slider; 35. Rotating rod; 36. Spiral slide; 37. Connecting frame; 38. Connecting cylinder; 39. Heat exchange tube; 40. Transmission tube; 41. Compression tube; 42. Stabilizing ring; 43. Lifting ring; 44. Lifting rod; 45. Guide plate; 46. Horizontal tube; 47. Center tube; 48. Discharge channel; 49. Liquid delivery tube. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] Example 1: Reference Figure 1-15 A device for recovering and utilizing exhaust gas emitted from the production of semi-coke includes a mounting frame 1, which not only serves as a supporting structure for the entire system, but is also used to load a combustion component, a smoke filter component, a heat exchange component, a particulate purification component, and an exhaust component, thereby ensuring close fit and efficient operation between the components.

[0042] Three supporting partitions 8 are arranged inside the installation frame 1, and the three supporting partitions 8 are respectively connected to the top end, the bottom end and the inner center of the frame, so as to divide the interior of the installation frame 1 into two installation chambers. Such an arrangement not only enhances the stability of the frame, but also provides independent installation space for each component, which is convenient for maintenance and management.

[0043] As a key component for exhaust gas collection, the gas collecting cylinder 4 is arranged on one side of the mounting frame 1 and is closely connected to the flue gas exhaust pipeline of the semi-coke production equipment. In this way, the exhaust gas can be quickly captured and introduced into the system once it is generated, providing a basis for subsequent processing. At the same time, the gas collecting cylinder 4 is also connected to the combustion assembly, realizing the temporary storage and efficient transportation of the exhaust gas.

[0044] The combustion assembly is installed in the bottom mounting chamber and is closely connected to the bottom support baffle 8. The combustion assembly includes a diversion pre-combustion section and a rectification combustion section, which are interconnected and together constitute the combustion system of the exhaust gas. In the diversion pre-combustion section, the exhaust gas undergoes preliminary combustion, and the temperature and flammability are improved; then it enters the rectification combustion section to achieve more complete and stable combustion. In this process, the combustible gases in the exhaust gas, such as methane and hydrogen, are efficiently utilized, and the combustion efficiency is significantly improved, thereby reducing the direct emission of combustible gases, reducing environmental pollution, and improving energy utilization efficiency.

[0045] The smoke filter assembly is arranged on the other side of the bottom mounting chamber, close to the combustion assembly. It includes a drive section and a filter section, which work together to achieve efficient filtration of smoke. The drive section is located at the top of the filter section, and extends to the top mounting chamber through the support baffle 8 in the middle. When the exhaust gas flows through the drive section, its high flow rate generates negative pressure, driving the filter section to work. When the exhaust gas passes through the filter medium, the dust particles are effectively intercepted, thereby achieving efficient filtration of smoke. This setting does not require an additional power source, reduces energy consumption, and ensures the cleanliness of the exhaust gas.

[0046] The heat exchange assembly is installed in the top installation chamber and is connected to the supporting partition 8 in the middle. The heat exchange assembly includes a heat exchange cylinder 11 and a plurality of heat exchange pipelines arranged inside the heat exchange cylinder 11. The top of the heat exchange cylinder 11 is connected to a liquid inlet pipeline, and the bottom is connected to a liquid discharge pipeline, which is convenient for the circulation and replacement of the cooling medium. When the clean exhaust gas enters one end of the heat exchange cylinder 11, it exchanges heat with the cooling medium in the heat exchange pipeline to recover the waste heat of the exhaust gas. In this process, the temperature of the exhaust gas is reduced, and the waste heat is recovered for other production links, which improves the energy utilization efficiency and further reduces energy consumption and environmental pollution.

[0047] The particle purification component is arranged on the top side of the top support partition 8 and is connected to the heat exchange component. As the last step of exhaust gas treatment, the particle purification component further removes tiny particles in the exhaust gas and ensures the final emission quality of the exhaust gas.

[0048] After multi-stage purification and heat exchange treatment, the tail gas is finally discharged into the atmosphere through the exhaust assembly, which is arranged on the other side of the top of the top support partition 8. In the whole process, harmful substances in the tail gas are effectively removed, realizing efficient and environmentally friendly treatment of the tail gas.

[0049] This program has the following working process:

[0050] During the production process of blue coke, the generated tail gas is firstly quickly captured by the gas collecting cylinder 4 and introduced into the tail gas recovery and utilization device inside the installation frame 1.

[0051] The tail gas first enters the combustion component, where it undergoes preliminary combustion in the diversion pre-combustion section, which increases its temperature and flammability; it then enters the rectification combustion section to achieve more complete and stable combustion. In this process, combustible gases in the tail gas, such as methane and hydrogen, are efficiently utilized, significantly improving combustion efficiency.

[0052] The exhaust gas after combustion then enters the smoke filter assembly. When the exhaust gas flows through the drive section, its high flow rate generates negative pressure, driving the filter section to work. When the exhaust gas passes through the filter medium, the dust particles are effectively intercepted, thereby achieving efficient filtration of smoke. This setting does not require an additional power source and reduces energy consumption.

[0053] The clean exhaust gas after the smoke filter then enters the heat exchange component. When the clean exhaust gas enters one end of the heat exchange cylinder 11, it exchanges heat with the cooling medium in the heat exchange pipeline to recover the exhaust heat. At the same time, the temperature of the exhaust gas is reduced.

[0054] The exhaust gas after heat exchange continues to flow through the particulate purification component. As the last step of exhaust gas treatment, the particulate purification component further removes tiny particles in the exhaust gas and ensures the final emission quality of the exhaust gas.

[0055] Finally, the exhaust gas after multi-stage purification and heat exchange treatment is discharged into the atmosphere through the exhaust component. In the whole process, harmful substances in the exhaust gas are effectively removed, achieving efficient and environmentally friendly treatment of the exhaust gas.

[0056] According to the above working process, we can know that:

[0057] Through the setting of the combustion component, the combustible gases in the tail gas, such as methane and hydrogen, are efficiently utilized, and the combustion efficiency is significantly improved. This not only reduces the direct emission of combustible gases and reduces environmental pollution, but also improves energy utilization efficiency.

[0058] The design of the smoke filter assembly does not require an additional power source. It uses the high flow rate of the exhaust gas to generate negative pressure to drive the filter section to work, achieving efficient filtration of smoke and reducing energy consumption. This setting ensures the cleanliness of the exhaust gas and provides favorable conditions for subsequent heat exchange and particle purification.

[0059] The introduction of heat exchange components realizes the recovery of waste heat from exhaust gas and improves energy utilization efficiency. The temperature of exhaust gas after heat exchange is reduced, and the waste heat is recovered for other production links, further reducing energy consumption and environmental pollution.

[0060] As the last step of exhaust gas treatment, the particle purification component ensures the final emission quality of the exhaust gas. After multi-stage purification and heat exchange treatment, the harmful substances in the exhaust gas are effectively removed, meeting the environmental emission standards.

[0061] Embodiment 2: Based on the embodiment 1, the solution in the embodiment 1 is further detailed in combination with the following specific working method, as described below for details:

[0062] The rectifying combustion section includes a combustion tube 9, and the diverting pre-combustion section includes a horizontally arranged isolation chamber 13. The isolation chamber 13 is connected to one end of the combustion tube 9. A connecting cover 14 is arranged at one end of the isolation chamber 13 close to the gas collecting tube 4.

[0063] Both sides of the bottom of the combustion tube 9 are connected to the bottom support partition 8 through side support frames, and a burner 10 installed on the top of the bottom support partition 8 is provided at the bottom center of the combustion tube 9, and a top output terminal 23 is provided at the top center of the burner 10, and a side output terminal 22 is provided on one side.

[0064] One side of the connecting hood 14 is connected to the interior of the gas collecting cylinder 4 through the air intake pipe, and the other side is fixedly connected with a mounting circular plate by bolts. A number of symmetrically arranged preheating tubes 17 are arranged inside the isolation chamber 13. One end of the preheating tube 17 is connected to the interior of the combustion tube 9, and the other end passes through the mounting circular plate and is connected to the interior of the connecting hood 14. A mounting groove 20 is provided on one side of each preheating tube 17. The combustion tube 9 built into the rectifying combustion section and the isolation chamber 13 arranged in the diverting pre-combustion section, as well as the connection between them achieved through the connecting hood 14, together constitute an exhaust gas treatment and combustion system.

[0065] The specific working process is as follows: the tail gas is first guided into the isolation chamber 13, where the tail gas undergoes a pretreatment combustion temperature raising step to ensure the high efficiency of its subsequent combustion. Subsequently, the pretreated tail gas passes through the preheating tube 17, and after efficient combustion treatment, it is quickly heated and sent to the combustion tube 9. In the combustion tube 9, the tail gas is fully and efficiently burned. This series of operations not only realizes the effective preheating and scientific diversion of the combustible gas in the tail gas, but also significantly improves the combustion efficiency and stability of the combustion process by optimizing the combustion conditions. Therefore, the direct emission of combustible gas has been greatly reduced, thereby effectively reducing environmental pollution. The top of the top output end 23 is connected to the interior of the combustion tube 9 through a plurality of combustion tubes, and one side of the side output end 22 is connected to the output tube 21 through the combustion tube. The output tube 21 is arranged in the middle position of a plurality of preheating tubes 17. The interior of each mounting slot 20 is connected to a combustion diversion tube 16, and each combustion diversion tube 16 is connected to the interior of the output tube 21 through a tube body. The end of the combustion tube 9 away from the isolation chamber 13 is connected to a connecting tube 18. The top output end 23 of the burner 10, the side output end 22, and the closely connected combustion diversion tube 16 and other structures together form an efficient flame distribution network.

[0066] In the working process, the hot flame generated by the burner 10 is evenly and quickly distributed to each area of ​​the combustion tube 9 and each preheating tube 17 through these pipes. This arrangement ensures the uniform distribution of the flame in the combustion chamber and avoids the problem of local overheating or incomplete combustion. Therefore, the combustion efficiency of the exhaust gas is greatly improved, and the combustible components in the exhaust gas are burned more completely, thereby further reducing the emission of harmful substances. A plurality of mounting grooves are provided on one side of the mounting circular plate, and one end of each preheating tube 17 is connected to a conical air inlet hood 15, and one end of the conical air inlet hood 15 is fixedly connected with the inner wall bolt of the mounting groove. The size of the conical air inlet hood 15 is gradually reduced, and the size of the conical air inlet hood 15 near one end of the mounting circular plate is larger than the size of the other end. The bottom of the isolation chamber 13 is fixedly connected with a support frame, and the mounting groove on the mounting circular plate and the conical air inlet hood 15 and other structures provide precise guidance and acceleration for the exhaust gas to enter the preheating tube 17. In the working process, the conical air inlet cover 15 acts like an efficient deflector, accurately guiding the incoming exhaust gas, and accelerates the flow rate of the exhaust gas through its unique shape setting. This setting not only increases the flow rate of the exhaust gas in the preheating tube 17, but also significantly improves the mixing efficiency of the exhaust gas and the flame by enhancing the contact area and mixing degree between the exhaust gas and the flame. Therefore, the entire combustion process is further optimized, and the combustion is more complete and efficient.

[0067] An electric flow regulating valve 19 is installed at one end of each preheating tube 17, an electric shut-off valve 12 is installed at one end of the air inlet pipe, and a flame monitoring system is installed inside the combustion tube 9.

[0068] The flame monitoring system mainly consists of the following parts:

[0069] Flame sensor (model of flame sensor: Honeywell FS-3000UV): The flame sensor is the core component of the system and is installed at a key position inside the combustion tube 9 to directly sense the presence, intensity and stability of the flame. The sensor usually uses ultraviolet or infrared photosensors to capture specific spectral signals emitted by the flame.

[0070] Signal processing unit (model of signal processing unit: Siemens Simatic ET 200S): The signal processing unit is responsible for receiving the original signal collected by the flame sensor and processing and analyzing it through algorithms. The signal processing unit can filter out noise interference and extract useful flame characteristic information, such as flame intensity, flicker frequency, etc.

[0071] Control logic unit (Model of logic control unit: Schneider Electric Modicon M580): The control logic unit determines whether the current flame state is normal based on the data provided by the signal processing unit. If it detects flame extinguishing, abnormal flickering or insufficient intensity, the control logic unit will immediately trigger the alarm system and communicate with the electric shut-off valve 12 and the combustion tube 9 through the interlock mechanism.

[0072] The alarm system is responsible for issuing an audible and visual alarm when the flame state is abnormal, alerting the operator. At the same time, the interlock system works closely with the electric shut-off valve 12 and the combustion tube 9. Once an abnormal flame is detected, the exhaust gas supply will be automatically cut off to prevent the occurrence of dangerous situations. During the operation of the device, the flame monitoring system continuously monitors the flame state in the combustion tube 9. When the flame sensor captures the flame signal, these signals are transmitted to the signal processing unit for processing. If the signal processing unit analyzes that the flame state is normal, the system remains silent and does not take any action. However, once the signal processing unit detects abnormal conditions such as flame extinction, abnormal flickering or insufficient intensity, the control logic unit will immediately start the alarm and interlock system. The alarm system issues an audible and visual alarm to alert the operator to the flame abnormality. At the same time, the interlock system quickly cuts off the electric shut-off valve 12 on the intake pipe to prevent the exhaust gas from continuing to enter the combustion tube 9, preventing safety accidents caused by flame extinction or abnormality.

[0073] In addition, the flame monitoring system is also connected to the control system of the burner 10, and can adjust the output power of the burner 10 in real time according to the flame state to ensure stable combustion of the flame. This closed-loop control mechanism makes the combustion process more efficient, stable and safe.

[0074] The flame monitoring system plays a vital role in the exhaust gas recovery device. It works closely with other components in the system to ensure the safe and stable operation of the device. It is specifically manifested in the following aspects:

[0075] Interlocking with the electric shut-off valve 12: When the flame monitoring system detects flame abnormality, it can quickly cut off the electric shut-off valve 12 to stop the exhaust gas from continuing to enter the combustion tube 9, thereby preventing exhaust gas leakage and safety accidents caused by flame extinction.

[0076] Coordinated control with the burner 10: The flame monitoring system can adjust the output power of the burner 10 in real time according to the flame state, ensure the stable combustion of the flame, and improve the combustion efficiency and exhaust gas treatment effect.

[0077] Linkage with the smoke filter assembly: The normal operation of the flame monitoring system ensures the stability of the flame in the combustion tube 9, thereby reducing the generation of smoke. This helps the smoke filter assembly to filter the smoke particles in the exhaust gas more efficiently, improving the filtering efficiency and cleanliness.

[0078] Cooperation with heat exchange components and particle purification components: The flame monitoring system ensures the stable combustion of the flame in the combustion tube 9, providing a clean and stable exhaust gas source for subsequent heat exchange and particle purification. This helps to improve the heat exchange efficiency and particle purification effect, ensuring that the final exhaust gas emission quality meets environmental protection standards.

[0079] The fire line monitoring system is electrically connected to the electric shut-off valve 12 and the combustion tube 9. The electric flow regulating valve 19 at one end of the preheating tube 17 and the electric shut-off valve 12 at one end of the intake pipe and the advanced flame monitoring system together constitute the intelligent control and safety protection mechanism of the combustion system. In the workflow, these devices can adjust the flow of exhaust gas in real time according to the combustion situation to ensure the stability and efficiency of combustion. At the same time, when an abnormal situation occurs, the electric shut-off valve 12 can quickly cut off the exhaust gas supply to prevent accidents. In addition, the flame monitoring system monitors the flame status at all times. Once an abnormality is found, it will automatically trigger the alarm system to ensure the safety of the combustion process. This setting realizes the automatic control and safety protection of the combustion process, greatly improving the reliability and safety of the system.

[0080] Embodiment 3: The smoke filter assembly includes a smoke filter tank 6, a cylinder body 26 and a central cylinder 25; the top of the smoke filter tank 6 is connected to a top cover 24, and the smoke filter tank 6 is bolted and fixedly connected to the top of the bottom support partition 8, the cylinder body 26 is arranged inside the installation chamber at the top, the central cylinder 25 is connected to the bottom of the cylinder body 26, and the bottom end of the central cylinder 25 passes through the middle support partition 8 and is connected to the inside of the top cover 24; the negative pressure pipeline includes a branch pipe 28 and a one-way valve 27, one end of the branch pipe 28 is connected to the inside of the connecting pipe 18 through the one-way valve 27, and the other end of the branch pipe 28 is connected to the bottom of one side of the cylinder body 26.

[0081] A rotating rod 35 is arranged inside the middle cylinder 25, one end of which passes through the top cover 24 through a shaft sleeve. The bottom end of the rotating rod 35 extends to the inside of the smoke filter tank 6 and is fixedly connected to a plurality of connecting frames 37 by bolts on the outer ring. Both sides of the connecting frame 37 are connected to smoke filter plates. A spiral slideway 36 is provided on the outer ring of the top end of the rotating rod 35.

[0082] The bottom bolts of the cylinder body 26 are fixedly connected with the bottom cover 30, and a piston 32 is installed on the top of the inner cavity of the cylinder body 26. The bottom center of the piston 32 is elastically connected to the top of the bottom cover 30 through a support spring 33. Both sides of the bottom of the piston 32 are fixedly connected with a round rod 31, one end of which passes through the bottom cover 30 through a sliding sleeve. A linkage ring 29 is provided on the outer ring of the top end of the rotating rod 35, and both sides of the inside of the linkage ring 29 are connected with arc-shaped sliders 34 adapted to the spiral slideway 36.

[0083] Through the close matching arrangement of the smoke filter tank 6, cylinder body 26, central cylinder 25 and negative pressure pipeline in the smoke filter assembly, including the branch pipe 28 and the one-way valve 27, these structures together constitute an efficient exhaust gas filtration system in the working process. When the exhaust gas after combustion is introduced into the smoke filter tank 6 through the connecting pipe 18, the cooperation of the one-way valve 27 and the branch pipe 28 causes negative pressure to be generated inside the cylinder body 26, thereby driving the piston 32 to move to the bottom of the cylinder body 26. This arrangement not only provides a power source for exhaust gas filtration, but also ensures the smooth progress of the filtration process. Through this arrangement, the effect of improving the response speed and filtration efficiency of the filtration system is achieved. Through the ingenious cooperation of the piston 32 in the cylinder body 26, the round rod 31, and the spiral slide 36 on the rotating rod 35 and the linkage ring 29 and other structures.

[0084] In the working process, the piston 32 performs irregular reciprocating up and down motion inside the cylinder body 26. Through the transmission effect of the round rod 31 and the linkage ring 29, the up and down movement of the linkage ring 29 can drive the rotating rod 35 to rotate. The rotation of the rotating rod 35 drives the smoke filter plate to perform efficient filtering operation. This setting realizes the automation and efficiency of the smoke filtration process, which not only reduces manual intervention, but also improves the continuity and stability of the filtration. Through this setting, the effect of improving the filtration efficiency, reducing the labor intensity and enhancing the stability of the filtration system is achieved. Further, the setting of the smoke filter assembly and its matching structure fully plays their respective roles in the working process, and together achieves the effect of improving the filtration efficiency and cleanliness and realizing the automation, continuity and stability of the smoke filtration process. Both ends of the heat exchange cylinder 11 are connected to the connecting cylinder 38, and a plurality of heat exchange pipelines are arranged in a circular array along the circumferential direction of the heat exchange cylinder 11.

[0085] The heat exchange pipeline includes two heat exchange tubes 39 and a compression tube 41. The ends of the two heat exchange tubes 39 that are far away from each other are respectively connected to the interior of the adjacent connecting tube 38, and the ends that are close to each other are connected to the interior of the compression tube 41. The diameter of the compression tube 41 is smaller than the diameter of the heat exchange tube 39, and both ends of the compression tube 41 are connected to the gradually expanding tube. The diameter of one end of the gradually expanding tube is the same as the diameter of the compression tube 41, and the other end is the same as the diameter of the heat exchange tube 39.

[0086] The ends of the two connecting tubes 38 that are away from each other are both connected to a transmission pipe 40, and one end of the transmission pipe 40 on one side is connected to the exhaust port on the top of one side of the smoke filter tank 6. By connecting the connecting tubes 38 at both ends of the heat exchange tube 11, and arranging a plurality of heat exchange pipelines in a circumferential array along the circumferential direction of the heat exchange tube 11, in the working process, the exhaust gas first enters the interior of the connecting tube 38, and then is divided and enters into a plurality of heat exchange pipelines to contact the heat exchange medium for heat exchange. This arrangement increases the contact area between the exhaust gas and the heat exchange medium, making the heat exchange more sufficient, improving the heat exchange efficiency and area utilization, and thus enhancing the effect of waste heat recovery.

[0087] The heat exchange pipeline includes two heat exchange tubes 39 and a compression tube 41, and the ends of the two heat exchange tubes 39 that are far away from each other are respectively connected to the inside of the adjacent connecting tube 38, and the ends that are close to each other are both connected to the inside of the compression tube 41. In the working process, the exhaust gas flows in the two heat exchange tubes 39 and undergoes preliminary heat exchange. Subsequently, the exhaust gas flows into the compression tube 41. Since the diameter of the compression tube 41 is smaller than that of the heat exchange tube 39, the flow rate of the exhaust gas in the compression tube 41 is accelerated. At the same time, after the exhaust gas passes through the compression effect of the compression tube 41, it will cool down rapidly in the subsequent expansion process, which further improves the cooling efficiency after the heat exchange, so that the heat energy in the exhaust gas can be more fully recovered and utilized.

[0088] Embodiment 4: The bottom of the top support partition 8 is fixedly connected with a lifting rod 44, and one side of the bottom of the lifting rod 44 is bolted fixedly connected with two lifting rings 43 that are sleeved with the outer ring of the heat exchange tube 11, and the other side of the top is bolted fixedly connected with a stabilizing ring 42 that is sleeved with the outer ring of the cylinder body 26. The lifting rod 44, lifting ring 43, and stabilizing ring 42 on the top support partition 8 provide a solid support and lifting guarantee for the entire system through a solid fit. In the workflow, these structures jointly bear the weight of components such as the heat exchange tube 11 and the cylinder body 26, as well as the dynamic loads during operation. They improve the stability and safety of the system structure by optimizing the structural design and material selection, and ensure the close fit and efficient operation between the components.

[0089] The exhaust component includes a chimney 3 and an induced draft fan 2. The bottom end of the chimney 3 is connected to the top of the top supporting baffle 8, the bottom of the induced draft fan 2 is connected to the top of the top supporting baffle 8, and the output end is connected to the inside of the chimney 3. Protective covers 5 are arranged on both sides of the two installation chambers, each of which is connected to the side wall of the installation frame 1. The four protective covers 5 shield and protect the surroundings of the installation frame 1, and a number of ventilation slots are opened on the outside of the protective covers 5. The exhaust component includes a chimney 3 and an induced draft fan 2, and the bottom end of the chimney 3 is connected to the top of the top supporting baffle 8, the bottom of the induced draft fan 2 is also connected to the top of the supporting baffle 8, and its output end is connected to the inside of the chimney 3. In the working process, the induced draft fan 2 can effectively draw the treated exhaust gas into the chimney 3 and discharge it into the atmosphere, thereby ensuring the smoothness and efficiency of exhaust gas emission and reducing the pollution of the exhaust gas to the surrounding environment.

[0090] By arranging protective covers 5 on both sides of the two installation chambers, and each protective cover 5 is connected to the side wall of the installation frame 1, during the working process, the protective cover 5 can effectively shield and protect the equipment in the installation frame 1, prevent external debris from entering and interfering with the normal operation of the equipment, and improve the safety and stability of the equipment.

[0091] The mounting frame 1 is shielded and protected on all sides by four protective covers 5, and a plurality of ventilation slots are provided on the outer sides of the protective covers 5. During the working process, the protective covers 5 not only provide comprehensive shielding protection, but also ensure ventilation in the mounting frame 1 through the ventilation slots, thereby avoiding damage to the equipment due to overheating, and also helping to extend the service life of the equipment and maintain its efficient operation.

[0092] The particle purification component includes a particle purification bin 7, which is installed on the top of the top support baffle 8 and is located on one side of the chimney 3. A plurality of transverse tubes 46 are arranged on the top of the particle purification bin 7 and along the horizontal direction of the particle purification bin 7. The plurality of transverse tubes 46 are connected through a central tube 47. A liquid delivery pipe 49 for connecting to a water supply device is connected to one side of the top of the central tube 47. Two spray pipes are connected to the bottom of each transverse tube 46, one end of which passes through the top of the particle purification bin 7. A nozzle is connected to the bottom end of the spray pipe. An inclined guide plate 45 is connected to the bottom of the inner cavity of the particle purification bin 7. A drainage channel 48 is connected to one side of the particle purification bin 7. One end of the drainage channel 48 extends to the bottom position of one side of the mounting frame 1 and is used to connect to the wastewater filtering structure. A transmission pipe 40 away from the side of the cylinder body 26 is connected to one end of the particle purification bin 7, and the other end of the particle purification bin 7 is connected to the inside of the chimney 3 through an exhaust pipe.

[0093] The particle purification assembly includes a particle purification chamber 7, and the particle purification chamber 7 is installed on the top of the top support partition 8 and is located on one side of the chimney 3. In the work process, a special particle purification area is provided for the exhaust gas, which helps to remove the particle impurities in the exhaust gas and improve the cleanliness of the exhaust gas. A plurality of transverse tubes 46 are arranged in the horizontal direction on the top of the particle purification chamber 7, and the transverse tubes 46 are connected through the central tube 47. The top side of the central tube 47 is connected to the liquid delivery pipe 49. In the work process, the water supply equipment delivers the purified liquid to the central tube 47 and the transverse tube 46 through the liquid delivery pipe 49, which provides sufficient liquid resources for subsequent spray purification.

[0094] Through the setting that two spray pipes with one end passing through the top of the particle purification bin 7 are connected at the bottom of each transverse tube 46, and the bottom end of the spray pipe is connected to the nozzle, in the work process, the purified liquid is evenly sprayed into the particle purification bin 7 through the nozzle, fully contacting with the particles in the tail gas, effectively removing the particle impurities, and improving the purification effect. Through the setting that the guide plate 45 is connected to the bottom of the inner cavity of the particle purification bin 7 and is inclined, in the work process, the guide plate 45 can guide the purified liquid and tail gas to flow out of the particle purification bin 7 smoothly, and prevent the liquid and tail gas from being retained in the bin, thereby improving the purification efficiency. Through the setting that the drainage channel 48 is connected to one side of the particle purification bin 7, and one end of the drainage channel 48 extends to the bottom position of one side of the mounting frame 1 and is connected to the wastewater filtration structure, in the work process, the purified liquid is discharged from the particle purification bin 7 through the drainage channel 48, and enters the wastewater filtration structure for further treatment, ensuring that the wastewater meets the discharge standards. The transmission pipe 40 away from the cylinder body 26 is connected to one end of the particle purification chamber 7, and the other end of the particle purification chamber 7 is connected to the inside of the chimney 3 through the exhaust pipe. In the working process, after the exhaust gas is purified by the particle purification chamber 7, it enters the chimney 3 through the exhaust pipe and is discharged into the atmosphere, ensuring the clean discharge of the exhaust gas and the continuity of the entire processing process. This setting not only improves the purification efficiency of the exhaust gas, but also ensures that the quality of the treated exhaust gas meets environmental protection requirements.

[0095] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for recycling tail gas discharged from the production of semi-coke, characterized in that: include: An installation frame (1) is provided with a supporting partition (8), wherein the supporting partition (8) divides the installation frame (1) into a first installation chamber and a second installation chamber arranged from bottom to top; The gas collecting cylinder (4) is arranged outside the installation frame (1); A combustion assembly is installed in the first installation chamber, the combustion assembly comprising a diverter pre-combustion section and a rectifying combustion section which are connected to each other; the diverter pre-combustion section is connected to the gas collecting cylinder (4); A smoke filter assembly, comprising a smoke filter tank (6), a cylinder body (26) and a central cylinder (25), wherein the smoke filter tank (6) is arranged in the first installation chamber, the cylinder body (26) is arranged in the second installation chamber, and the central cylinder (25) is connected between the smoke filter tank (6) and the cylinder body (26); the cylinder body (26) is connected to the rectifying combustion section via a negative pressure pipeline; a heat exchange assembly disposed in the second installation chamber, the heat exchange assembly comprising a heat exchange cylinder (11) and a plurality of heat exchange pipelines disposed inside the heat exchange cylinder (11), one end of the heat exchange cylinder (11) being in communication with the smoke filter tank (6), the top of the heat exchange cylinder (11) being connected to a liquid inlet pipeline, and the bottom of the heat exchange cylinder (11) being connected to a liquid discharge pipeline; a particle purification component, arranged at the top of the mounting frame (1) and connected to the other end of the heat exchange cylinder (11); an exhaust component, arranged at the top of the mounting frame (1) and connected to the particle purification component; The rectifying combustion section comprises a combustion cylinder (9), and the diverting pre-combustion section comprises an isolation chamber (13). The isolation chamber (13) is connected to one end of the combustion cylinder (9), and a connecting cover (14) is provided at one end of the isolation chamber (13) close to the gas collecting cylinder (4). Both sides of the bottom of the combustion tube (9) are connected to the bottom support baffle (8) via side support frames, and a burner (10) mounted on the top of the bottom support baffle (8) is provided at the bottom center of the combustion tube (9), and a top output end (23) is provided at the top center of the burner (10), and a side output end (22) is provided on one side; One side of the connecting cover (14) is connected to the interior of the gas collecting cylinder (4) via an air inlet pipe, and the other side is fixedly connected to a mounting circular plate by bolts. A plurality of symmetrically arranged preheating tubes (17) are arranged inside the isolation chamber (13). One end of the preheating tube (17) is connected to the interior of the combustion cylinder (9), and the other end passes through the mounting circular plate and is connected to the interior of the connecting cover (14). A mounting notch (20) is provided on one side of each preheating tube (17); The top of the top output end (23) is connected to the interior of the combustion tube (9) via a plurality of combustion tubes; one side of the side output end (22) is connected to an output tube (21) via a combustion tube; the output tube (21) is arranged in the middle of a plurality of preheating tubes (17); the interior of each of the mounting notches (20) is connected to a combustion shunt tube (16); each of the combustion shunt tubes (16) is connected to the interior of the output tube (21) via a tube body; and the end of the combustion tube (9) away from the isolation chamber (13) is connected to a connecting tube (18).

2. The device for recycling tail gas discharged from the production of semi-coke according to claim 1, characterized in that: A plurality of mounting grooves are provided on one side of the mounting circular plate, one end of each of the preheating tubes (17) is connected to a conical air inlet hood (15), one end of the conical air inlet hood (15) is fixedly connected to the inner wall of the mounting groove by bolts, the size of the conical air inlet hood (15) close to one end of the mounting circular plate is larger than the size of the other end, and the bottom of the isolation chamber (13) is fixedly connected to a support frame.

3. The device for recycling tail gas discharged from the production of semi-coke according to claim 1, characterized in that: An electric flow regulating valve (19) is installed at one end of each preheating tube (17), an electric shut-off valve (12) is installed at one end of the air intake pipe, a flame monitoring system is installed inside the combustion tube (9), and the fire line monitoring system is electrically connected to the electric shut-off valve (12) and the combustion tube (9).

4. The device for recycling tail gas discharged from the production of semi-coke according to claim 1, characterized in that: The negative pressure pipeline comprises a branch pipe (28) connected to the bottom of one side of the cylinder body (26), and a one-way valve (27) is installed at the other end of the branch pipe (28); A rotating rod (35) is provided inside the central cylinder (25), one end of which penetrates the top cover (24) and extends into the interior of the smoke filter tank (6); a plurality of connecting frames (37) are threadedly connected on the outer circumferential surface of one end of the rotating rod (35) located inside the smoke filter tank (6); both sides of the connecting frame (37) are connected to smoke filter plates; and a spiral slideway (36) is provided on a section of the outer circumferential surface of the rotating rod (35); The bottom of the cylinder body (26) is fixedly connected to a bottom cover (30) by bolts, and the top of the bottom cover (30) is connected to a piston (32) that matches the inner cavity of the cylinder body (26) via a support spring (33). Both sides of the bottom of the piston (32) are fixedly connected to a round rod (31) whose end passes through the bottom cover (30) via a sliding sleeve, and the bottom of the round rod (31) is connected to a linkage ring (29) that matches the rotating rod (35), and an arc-shaped sliding block (34) that matches the spiral slideway (36) is fixedly connected to the inner arc surface of the linkage ring (29).

5. The device for recycling tail gas discharged from the production of semi-coke according to claim 4, characterized in that: Both ends of the heat exchange cylinder (11) are connected to a connecting cylinder (38), and a plurality of heat exchange pipelines are arranged in a circumferential array along the circumferential direction of the heat exchange cylinder (11); The heat exchange pipeline comprises two heat exchange tubes (39) and a compression tube (41); the ends of the two heat exchange tubes (39) that are far away from each other are respectively connected to the interior of the adjacent connecting tube (38), and the ends that are close to each other are both connected to the interior of the compression tube (41); The ends of the two connecting tubes (38) that are away from each other are both connected to a transmission pipe (40), wherein the end of one transmission pipe (40) away from the connecting tube (38) is connected to a smoke filter tank (6), and the other transmission pipe (40) is connected to one end of a particle purification chamber (7).

6. The device for recycling tail gas discharged from the production of semi-coke according to claim 5, characterized in that: The bottom of the supporting partition (8) at the top is fixedly connected to a hanging rod (44), one side of the bottom of the hanging rod (44) is bolted fixedly connected to two hanging rings (43) sleeved with the outer ring of the heat exchange cylinder (11), and the other side of the bottom is bolted fixedly connected to a stabilizing ring (42) sleeved with the outer ring of the cylinder body (26).

7. The device for recycling tail gas discharged from the production of semi-coke according to claim 5, characterized in that: The exhaust assembly comprises a chimney (3) and an induced draft fan (2) fixedly mounted on the top of the mounting frame (1); the output end of the induced draft fan (2) is connected to the interior of the chimney (3); protective outer covers (5) are provided on both sides of the two mounting chambers; ventilation grooves are provided on the outer surface of the protective outer covers (5).

8. The device for recycling tail gas discharged from the production of semi-coke according to claim 5, characterized in that: The particle purification component comprises a particle purification bin (7) mounted on the top of a mounting frame (1); a plurality of transverse tubes (46) are arranged on the top of the particle purification bin (7); the plurality of transverse tubes (46) are connected to each other through a central tube (47); a liquid delivery tube (49) connected to a water supply device is connected to one side of the top of the central tube (47); two spray pipes are connected to the bottom of each transverse tube (46), one end of which passes through the top of the particle purification bin (7); a nozzle is connected to the bottom end of the spray pipe; an inclined guide plate (45) is connected to the bottom of the inner cavity of the particle purification bin (7); a liquid discharge channel (48) is connected to one side of the particle purification bin (7); one end of the liquid discharge channel (48) extends to the bottom position of one side of the mounting frame (1) and is connected to a wastewater filtering structure; the other end of the particle purification bin (7) is connected to the inside of a chimney (3) through an exhaust pipe.

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