Improved pipeline-based ventilation air methane storage and oxidation device

Abstract

The present application relates to the improved pipeline-based ventilation gas heat accumulation oxidation device, belongs to the gas treatment technical field. The device mainly solves the problems of the existing technology, such as the thermal expansion and cold shrinkage leading to the component deviation, the airflow impact causing the wear and tear, and the untreated tail gas causing the environmental pollution. The technical scheme comprises: the heat accumulation oxidation assembly for the ventilation gas oxidation treatment; the improved pipeline structure is arranged at the bottom, the airflow pressure is dispersed through the outer pipe, the partition pipe and the through hole, and the wear and tear is reduced by the cooperation of the movable metal ball; the purification structure removes the ash through the atomizing nozzle, and the motor drives the activated carbon filter assembly to adsorb the carbon dioxide; the heat exchange box recovers the waste heat to improve the energy efficiency. The present application improves the equipment structure stability, avoids the component deviation, realizes the deep purification of the exhaust gas, reduces the environmental pollution, optimizes the heat energy utilization rate, and enhances the practicality and safety of the device.

Description

Technical Field

[0001] This invention belongs to the field of gas treatment technology, specifically a waste gas regenerative oxidation device based on improved pipelines. Background Technology

[0002] In the field of coal mine safety production and comprehensive energy utilization, the treatment and utilization of exhaust gas has long been a critical issue. Regenerative Thermal Oxidizer (RTO) technology, especially RTO devices based on the principle of High Temperature Low Oxygen Combustion (HTAC), is one of the effective means of treating low-concentration methane. This technology maintains the high temperature of the furnace by alternately absorbing and releasing the heat generated by the reaction through ceramic regenerators, thereby achieving complete oxidation of methane in exhaust gas at a relatively low operating cost.

[0003] However, existing regenerative thermal oxidation devices have revealed the following two major technical defects during long-term operation:

[0004] Insufficient structural reliability: Regenerative thermal oxidation devices need to operate at extreme temperatures ranging from 700°C to 1000°C. The huge temperature difference causes the internal metal components (such as pipes and supports) to frequently experience thermal expansion and contraction. This thermal stress can induce minute displacements, deformations, and even shifts in the components. Over time, these shifts can disrupt the uniform distribution of airflow within the equipment, creating localized high temperatures or dead zones. This not only reduces oxidation efficiency but also exacerbates mechanical wear between components, severely impacting the operational stability and service life of the equipment.

[0005] Lack of environmental efficiency: Traditional RTO (Regenerative Thermal Oxidizer) unit designs primarily focus on heat recovery efficiency and methane oxidation rate, while neglecting the purification and treatment of the resulting exhaust gas. Although the exhaust gas from the oxidation of exhaust gas mainly consists of carbon dioxide and water vapor, it still carries trace amounts of dust particles (ash). If emitted directly without treatment, these pollutants will still burden the atmospheric environment. Especially with increasingly stringent environmental regulations, units lacking exhaust gas decarbonization and dust removal mechanisms can no longer meet the green emission standards of modern industry.

[0006] Therefore, the market urgently needs a new type of exhaust gas regenerative oxidation device that not only maintains high thermal energy utilization but also fundamentally solves the stability problem caused by thermal stress through structural design, and integrates a highly efficient exhaust gas purification system to achieve long-term, stable, and clean operation of the device. This invention is an innovative solution proposed to address the aforementioned technical challenges. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a waste gas regenerative oxidation device based on improved pipelines, which has advantages such as uniform operation and stable and controllable airflow. It solves the problem of uneven expansion of components during thermal expansion and contraction, and achieves environmental protection effects.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A waste gas regenerative oxidation device based on improved pipelines includes:

[0010] An oxidation box 4, which contains a regenerative oxidation assembly 5 for oxidizing exhaust gas;

[0011] A purification box 8 is connected to the oxidation box 4, and a purification structure 9 is provided inside for purifying the oxidized waste gas.

[0012] A pipe structure 111 disposed at the bottom of the regenerative oxidation assembly 5, the pipe structure 111 comprising:

[0013] At least one outer tube 1101;

[0014] A partition tube 1104 fixed inside the outer tube 1101 has a through vent 1106 on its wall; and

[0015] A magnetically conductive metal ball 1103 is movable between the outer tube 1101 and the partition tube 1104;

[0016] The purification structure 9 includes:

[0017] Atomizing nozzle 903 connected to a pesticide source and used for spraying pesticide solution; and

[0018] A filter assembly 907 comprising an adsorbent material and driven by a motor 904 to move within the purification chamber 8.

[0019] Furthermore, the inner wall of the outer tube 1101 is provided with a balance groove 1102 for limiting the range of motion of the magnetically conductive metal ball 1103; the interior of the partition tube 1104 is fixed with a reinforcing rib 1105, and an electromagnetic heating plate is provided inside the reinforcing rib 1105.

[0020] Furthermore, the regenerative oxidation assembly 5 includes a combustion chamber 504 and a regenerative chamber 506 separated by a partition 502, and the combustion chamber 504 and the regenerative chamber 506 are connected through a gas supply pipe 505.

[0021] Furthermore, the filter assembly 907 is slidably engaged with the side wall of the purification chamber 8 via a slider 911; a solenoid valve is provided on the exhaust pipe 912 of the purification chamber 8.

[0022] Furthermore, the device also includes a heat exchange box 6 disposed between the oxidation box 4 and the purification box 8, and the heat exchange box 6 is provided with heat exchange tubes 702.

[0023] Furthermore, the bottom of the pipeline structure 111 is connected to a second gas tank 112, and the top of the second gas tank 112 is connected to a plurality of the outer pipes 1101.

[0024] Furthermore, the bottom of the heat storage oxidation component 5 is provided with a plurality of electric heating radiation tubes 110, which are electrically connected to the electromagnetic heating plate.

[0025] Furthermore, the filter assembly 907 includes a filter mesh layer 909, and the adsorption material is activated carbon balls 910 disposed on the filter mesh layer 909.

[0026] Furthermore, the device is also connected to at least one of a solar energy module, a wind energy module, and a geothermal energy module, and the power of the device is adjusted by a controller 2.

[0027] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0028] (1) Through the unique pipeline structure design, the pressure of high-temperature airflow is effectively buffered and homogenized by the synergistic effect of the separator pipe, through air hole and movable metal ball, reducing the impact of thermal stress on the components, fundamentally suppressing the component displacement problem caused by thermal expansion and contraction, and significantly improving the long-term operational reliability and service life of the equipment.

[0029] (2) The integrated purification structure can efficiently remove ash particles and carbon dioxide from exhaust gas through the dual action of atomized spraying and dynamic adsorption. The motor-driven mobile filter assembly increases the contact efficiency between pollutants and adsorption materials, ensuring that the exhaust gas meets strict environmental standards.

[0030] (3) The modular design of the electric heating radiant tube, combined with the specially designed inspection door, allows operators to perform online testing and replacement of individual faulty heating elements without stopping the equipment, which greatly shortens maintenance time, reduces maintenance costs, and ensures production continuity.

[0031] (4) By recovering the waste heat of the exhaust gas through the heat exchange box and intelligently controlling various energy sources such as solar energy and wind energy to power the equipment through the controller, the energy cascade utilization and efficient management are realized, reducing the overall energy consumption of the device and making it more economical and widely applicable. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall process flow of the present invention;

[0033] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the waste gas thermal oxidation device of the present invention;

[0034] Figure 3 This is a cross-sectional view of the purification box section in this invention;

[0035] Figure 4 This is a cross-sectional view of the oxidation chamber portion in this invention;

[0036] Figure 5 This is a cross-sectional view of the heat exchange box section in this invention.

[0037] Figure 6 This is a three-dimensional schematic diagram of the improved pipeline structure in this invention;

[0038] Figure 7 This is a front sectional view of the improved pipeline structure in this invention;

[0039] Figure 8 This is a schematic diagram of the heat storage heat exchanger and access door structure viewed from a top angle in this invention;

[0040] Figure 9 This is a three-dimensional schematic diagram of the connection relationship between the pipeline structure and the second gas tank in this invention.

[0041] Reference numerals: 1. Support plate; 2. Controller; 3. Support leg; 4. Oxidation box; 5. Regenerative oxidation assembly; 501. Inlet pipe; 502. Baffle plate; 503. Burner; 504. Combustion chamber; 505. Gas supply pipe; 506. Regenerator; 6. Heat exchange box; 7. Heat exchange assembly; 701. Filter plate one; 702. Heat exchange tube; 703. Fixing plate; 8. Purification box; 9. Purification structure; 901. Chemical tank; 902. Water inlet pipe; 903. Atomizing nozzle; 904. Motor; 905. Threaded rod; 906. Threaded block; 907. Filter assembly; 908. Filter tube. Filter plate two; 909, filter screen layer; 910, activated carbon ball; 911, slider; 912, exhaust pipe; 12, extension seat; 13, air intake structure; 14, connecting pipe; 15, rotating door; 16, rotating handle; 17, connecting arm; 18, unblocking pipe; 19, heat exchanger; 110, electric heating radiant tube; 111, pipeline structure; 1101, outer pipe; 1102, balance tank; 1103, metal ball; 1104, partition pipe; 1105, reinforcing rib; 1106, through air hole; 112, second air tank; 113, filter screen plate; 114, exhaust hole. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 9 The present invention provides a waste gas thermal oxidation device based on an improved pipeline.

[0044] First refer to Figure 2 The diagram shows the overall external structure of the device. The entire device is mounted on a sturdy support plate 1, whose bottom is stably supported on the ground by four support legs 3. A controller 2 is also installed at the bottom of the support plate 1. This controller 2 is the core of the entire device and is used to regulate the operation of each component. At the top of the support plate 1, from left to right, an oxidation box 4, a heat exchange box 6, and a purification box 8 are installed sequentially. They are connected in sequence by pipes, forming the main path for waste gas treatment.

[0045] Please refer to Figure 4 This is the internal structure of the oxidation chamber 4. The oxidation chamber 4 is the core area for the oxidation reaction of exhaust gas, and it contains a regenerative oxidation assembly 5. Exhaust gas enters the oxidation chamber 4 through the top inlet pipe 501. The interior of the chamber is horizontally divided into upper and lower sections by a partition 502. The space above the partition 502 forms the combustion chamber 504, and a burner 503 is installed on the side wall of the combustion chamber 504 to ignite the gas and maintain combustion. The space below the partition 502 forms the regenerator chamber 506, which is filled with a ceramic regenerator (not shown in the figure). One or more gas supply pipes 505 pass through the partition 502, connecting the combustion chamber 504 and the regenerator chamber 506. After oxidation, the high-temperature flue gas enters the regenerator chamber 506 through the gas supply pipe 505, transferring its heat to the regenerator.

[0046] Inside the regenerative oxidation assembly 5, multiple, for example six, equidistantly distributed electric heating radiant tubes 110 are also installed. These heating tubes serve as auxiliary heat sources to ensure stable furnace temperature. For ease of maintenance, such as... Figure 8 As shown, the device is equipped with a rotating door 15, which can be easily opened by rotating the handle 16. The rotating door 15 is connected to a connecting arm 17, and the connecting arm 17 has a drain pipe 18 inside, allowing for maintenance or replacement of the internal regenerative heat exchanger 19 or electric heating radiant tube 110 without opening the main furnace body. The top of the regenerative oxidation assembly 5 is also equipped with an extension seat 12, which contains a suction structure 13 and a connecting pipe 14 for the extraction and circulation of auxiliary gas.

[0047] After the exhaust gas leaves the heat storage chamber 506, it will enter the improved piping structure 111 located at the bottom of the device. Please refer to this carefully. Figure 6 , Figure 7 and Figure 9 The pipeline structure 111 is one of the core innovations of this invention. It includes multiple, for example four, vertically arranged outer tubes 1101. A partition tube 1104 is coaxially fixed inside each outer tube 1101. Numerous through-holes 1106 are evenly distributed on the wall of the partition tube 1104. Several magnetically conductive metal balls 1103 are filled in the annular space between the partition tube 1104 and the outer tube 1101. To properly constrain the range of motion of the metal balls 1103 and prevent excessive rolling and wear, a balancing groove 1102 is specially machined on the inner wall of the outer tube 1101. The partition tube 1104 also has reinforcing ribs 1105 inside to enhance its structural strength. The reinforcing ribs 1105 integrate electromagnetic heating plates and are electrically connected to the external electric heating radiation tube 110.

[0048] like Figure 9 As shown, the bottoms of multiple outer tubes 1101 are connected to a second gas tank 112. The second gas tank 112 is a confluence and buffer chamber, and its interior is equipped with a filter screen 113 for initial interception of larger particulate impurities. The treated gas is finally discharged through the exhaust port 114 on the side wall of the second gas tank 112 and flows to the next stage equipment.

[0049] Please refer to the following. Figure 5 The internal structure of the heat exchanger 6 is shown. High-temperature gas discharged from the piping structure 111 enters the heat exchanger 6, which houses a heat exchange assembly 7. The heat exchange assembly 7 mainly comprises one or more U-shaped heat exchange tubes 702, with both ends of the heat exchange tubes 702 extending out of the heat exchanger 6 housing and connectable to an external cooling water circulation system. The high-temperature gas flows over the outer surface of the heat exchange tubes 702, transferring its heat to the cooling water inside the tubes, thus achieving waste heat recovery. To protect the heat exchange tubes 702 and ensure their orderly arrangement, a grooved fixing plate 703 is provided at the bottom of the housing. A filter plate 701 can also be installed inside the housing for further gas filtration.

[0050] Please see last. Figure 3 The internal structure of the purification chamber 8 is shown. After heat exchange and cooling, the exhaust gas finally enters the purification chamber 8 for deep purification. The purification chamber 8 has a sophisticated purification structure 9 inside. A reagent tank 901 is fixed to the top of the chamber for storing absorbent (such as an alkaline solution). The reagent tank 901 is connected to multiple atomizing nozzles 903 below via a water inlet pipe 902. A water pump (not shown) is installed on the water inlet pipe 902, which pumps the reagent to the nozzles and atomizes it, forming a fine droplet curtain for washing away ash and acidic gases in the exhaust gas.

[0051] In the lower half of the purification chamber 8, there is a vertically movable filter assembly 907. The left side of the filter assembly 907 is fixedly connected to a threaded block 906, which is fitted onto a threaded rod 905 driven by a motor 904. The motor 904 is a reversible motor. The right side of the filter assembly 907 is slidably engaged with a slide rail (not shown) on the side wall of the purification chamber 8 via a slider 911, ensuring smooth vertical movement. The filter assembly 907 itself consists of a filter plate 908 forming a frame, filled with a filter mesh layer 909 and a large number of activated carbon balls 910. When the motor 904 rotates, the threaded rod 905 drives the filter assembly 907 to reciprocate up and down. This dynamic process not only prevents the filter material from clogging but also disturbs the airflow inside the chamber, greatly improving the adsorption efficiency of the activated carbon balls 910 for pollutants such as carbon dioxide. The purified gas is finally discharged through the exhaust pipe 912 at the bottom of the chamber.

[0052] Example 1: Airflow homogenization and thermal stress buffering process in pipeline structure

[0053] Start-up and high-temperature gas generation: The controller 2 starts the device, and the exhaust gas enters the oxidation box 4 through the intake pipe 501. It is ignited and oxidized by the burner 503 in the combustion chamber 504 to generate high-temperature flue gas above 700°C.

[0054] Gas enters the pipeline structure: After passing through the heat storage chamber 506, the high-temperature flue gas enters the pipeline structure 111 from the bottom and first flows into the interior of the partition pipe 1104.

[0055] Pressure buffering and diversion: When the instantaneous airflow pressure is large, in addition to the mainstream gas flowing downward along the separator 1104, a portion of the gas will be depressurized through the through-hole 1106 on the pipe wall and diverted to the annular space between the outer pipe 1101 and the separator 1104.

[0056] Dynamic energy absorption and vibration damping: The diverted gas impacts the metal sphere 1103 within the space, causing it to roll slightly within the area defined by the balance groove 1102. The rolling process of the metal sphere absorbs part of the kinetic energy of the airflow, playing a role in buffering and vibration damping, and avoiding rigid impact. At the same time, the presence of the sphere complicates the airflow path, which helps to further homogenize the airflow.

[0057] Induction heating and secondary heating: Simultaneously, controller 2 instructs the electric heating radiant tube 110 to operate and supplies power to the electromagnetic heating plate inside the reinforcing rib 1105 through the circuit. The electromagnetic heating plate generates an alternating magnetic field, which induces eddy current heating in the magnetically conductive metal ball 1103, making it itself a heat source and providing secondary heating to the flowing gas to ensure a complete reaction.

[0058] Combination and Discharge: After being processed by multiple external pipes 1101, the gas finally flows into the second gas tank 112. After preliminary filtration by the filter screen 113, it is discharged through the exhaust port 114 and enters the heat exchange box 6. The entire process effectively avoids stress concentration and mechanical wear.

[0059] Example 2: Cascaded Heat Recovery and Dynamic Deep Purification Process for Waste Gas

[0060] Waste heat recovery: The high-temperature gas discharged from Example 1 enters the heat exchanger 6. The external cooling water system is activated, and cooling water flows into the heat exchange tube 702. As the high-temperature gas flows through the outer wall of the heat exchange tube 702, it transfers heat to the cooling water inside the tube. The heated water can then be used for domestic heating or to generate steam, achieving cascaded utilization of energy. The gas temperature itself is significantly reduced.

[0061] Spray washing: The cooled exhaust gas enters the purification chamber 8. The controller 2 starts the water pump on the water inlet pipe 902, pumping the alkaline solution in the reagent tank 901 to the atomizing nozzle 903. The nozzle sprays out uniform mist droplets, which come into countercurrent contact with the exhaust gas, effectively washing and neutralizing the dust particles and acidic gases entrained in the exhaust gas.

[0062] Dynamic adsorption: At the same time, controller 2 starts motor 904. Motor 904 drives threaded rod 905 to rotate, which in turn drives filter assembly 907 to slowly move up and down along slide rail inside the purification chamber.

[0063] Enhanced turbulence: The movement of the filter assembly 907 disturbs the airflow field inside the chamber, breaking any possible airflow "short circuits" or dead zones, and forcing all gases to pass fully through the filter adsorption layer composed of the filter mesh layer 909 and activated carbon balls 910.

[0064] High-efficiency purification and emission: Activated carbon balls 910, with their large specific surface area, efficiently adsorb residual carbon dioxide and other organic matter in the exhaust gas. After dual purification through spray washing and dynamic adsorption, the clean gas is discharged in compliance with standards through exhaust pipe 912. The solenoid valve can adjust the emission flow rate in real time according to operating conditions.

[0065] Example 3: Multi-energy coordinated control and online maintenance process

[0066] Multiple energy inputs: The device is externally connected to solar photovoltaic panels, a wind turbine, and a geothermal energy converter (corresponding to solar modules, wind modules, and geothermal modules, respectively). The electrical energy generated by these modules is stored in a battery bank.

[0067] Intelligent energy dispatch: Controller 2 monitors the battery charge and exhaust gas concentration in real time. When the gas concentration is low and the oxidation heat release is insufficient to maintain the furnace temperature, controller 2 will prioritize the use of electricity from renewable energy sources to start the electric heating radiant tube 110 and electromagnetic heating plate for auxiliary heating, minimizing dependence on grid power.

[0068] Online fault detection: During equipment operation, controller 2 continuously monitors the current and temperature of each electric heating radiant tube 110. Once an abnormality is detected in a heating tube (such as an open circuit or excessively low temperature), the controller will immediately issue an alarm signal.

[0069] Online rapid replacement: Maintenance personnel do not need to stop the machine. Simply go to the equipment, turn the handle 16, and open the rotating door 15. Through the drain pipe 18, which is designed for replacing specific heating elements, maintenance personnel can safely and quickly remove the faulty electric heating radiant tube 110 and replace it with a new spare. The entire process is quick and has minimal impact on production.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas regenerative oxidation device based on improved pipeline, characterized in that: include: An oxidation box (4) is provided with a regenerative oxidation assembly (5) for oxidizing exhaust gas; A purification box (8) is connected to the oxidation box (4), and a purification structure (9) is provided inside for purifying the oxidized waste gas. A piping structure (111) disposed at the bottom of the regenerative oxidation assembly (5), the piping structure (111) comprising: At least one outer tube (1101); A partition tube (1104) fixed inside the outer tube (1101) has a through vent (1106) on its wall; and A magnetically conductive metal ball (1103) is movably disposed between the outer tube (1101) and the partition tube (1104); The purification structure (9) includes: Atomizing nozzle (903) connected to a pesticide source and used for spraying pesticide solution; and A filter assembly (907) comprising an adsorbent material and driven by a motor (904) to move within the purification chamber (8).

2. The waste gas regenerative oxidation device based on improved pipeline as described in claim 1, characterized in that: The inner wall of the outer tube (1101) is provided with a balance groove (1102) for limiting the range of motion of the magnetic metal ball (1103); the interior of the partition tube (1104) is fixed with a reinforcing rib (1105), and an electromagnetic heating plate is provided inside the reinforcing rib (1105).

3. The waste gas regenerative oxidation device based on improved pipeline as described in claim 1, characterized in that: The regenerative oxidation assembly (5) includes a combustion chamber (504) and a regenerative chamber (506) separated by a partition (502), and the combustion chamber (504) and the regenerative chamber (506) are connected through a gas supply pipe (505).

4. The waste gas regenerative oxidation device based on improved pipeline as described in claim 1, characterized in that: The filter assembly (907) is slidably engaged with the side wall of the purification box (8) via a slider (911); a solenoid valve is provided on the exhaust pipe (912) of the purification box (8).

5. The waste gas regenerative oxidation device based on improved pipeline as described in claim 1, characterized in that: The device also includes a heat exchange box (6) disposed between the oxidation box (4) and the purification box (8), and the heat exchange box (6) is provided with heat exchange tubes (702).

6. The waste gas regenerative oxidation device based on improved pipeline according to claim 1, characterized in that: The bottom of the pipeline structure (111) is connected to a second gas tank (112), and the top of the second gas tank (112) is connected to a plurality of the outer pipes (1101).

7. The waste gas regenerative oxidation device based on improved pipeline according to claim 2, characterized in that: The bottom of the heat storage oxidation component (5) is provided with a plurality of electric heating radiation tubes (110), which are electrically connected to the electromagnetic heating plate.

8. The waste gas regenerative oxidation device based on improved pipeline as described in claim 1, characterized in that: The filter assembly (907) includes a filter mesh layer (909), and the adsorption material is activated carbon balls (910) disposed on the filter mesh layer (909).

9. The waste gas regenerative oxidation device based on improved pipeline according to claim 1, characterized in that: The device is also connected to at least one of a solar energy module, a wind energy module and a geothermal energy module, and the power of the device is adjusted by a controller (2).

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