Sealed combustion device based on negative pressure gas collection

Abstract

The application discloses a sealed combustion device based on negative pressure gas collection, and belongs to the technical field of waste gas combustion. The sealed combustion device comprises a device body, a rotating seat, a plurality of air suction pipes, a plurality of fan blades, an igniter and an exhaust passage. The rotating seat is internally provided with a combustion chamber. One side of the combustion chamber is provided with a rotating hole. The rotating hole is internally rotatably provided with the rotating seat. The plurality of air suction pipes are uniformly arranged on the rotating seat. The igniter is arranged on one side of the rotating seat which faces the combustion chamber. In the application, the air suction pipe, the fan blade and the through hole structure are collectively integrated on the rotating seat. Through the rotation of the rotating seat, the air suction pipe inlet is directly located in the vortex negative pressure area formed by the rotating fan blade, which helps to accelerate the gas suction into the air suction pipe and the introduction into the combustion chamber. Unlike the static air suction in the prior art, the application realizes the cooperative linkage of the air suction process and the negative pressure formation process through structural integration and motion coupling, and the gas introduction is more direct, which helps to improve the air suction efficiency and enhance the stability of the natural gas and waste gas introduction.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas combustion, and in particular to a sealed combustion device based on negative pressure gas collection. Background Art

[0002] During natural gas extraction and chemical production, the waste gas generated by negative pressure gas extraction processes often contains unrecovered hydrocarbons and high concentrations of hydrogen sulfide (H2S). Direct emission of these gases can pose serious safety risks and environmental pollution. Traditional waste gas treatment technologies rely primarily on open flare systems or fixed incinerators.

[0003] CN110887051B discloses a waste gas incinerator with sufficient combustion for environmental protection projects, including a furnace body, a controller, an exhaust pipe and an air intake device; the air intake device includes a mixing chamber, a mixing mechanism, an air outlet pipe, an air intake mechanism, an adjustment component and two air intake pipes; the incinerator can evenly mix the waste gas and air through the mixing mechanism, so that the waste gas is fully burned.

[0004] This type of incinerator features a static air intake structure, where the intake pipe is fixed to the outside of the device, while rotating fan blades are installed inside the combustion chamber or device. When the fan blades rotate, a certain negative pressure is created inside the combustion chamber, which draws external air into the combustion area through the intake pipe. However, this structure has two major drawbacks:

[0005] First, the gas channel is long and the flow path is curved, which limits the intake efficiency; second, the fan blades are separated from the intake device, the coordinated efficiency is low, the negative pressure driving ability is weak, and the intake rate is difficult to increase, which cannot meet the combustion requirements of large flow or rapid response. Summary of the Invention

[0006] The purpose of the present invention is to provide a sealed combustion device based on negative pressure gas collection to solve the problem of low air intake rate in the prior art.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A sealed combustion device based on negative pressure gas collection, comprising:

[0009] The device body has a combustion chamber inside, wherein a rotation hole is provided on one side of the combustion chamber;

[0010] A rotating seat is rotatably mounted in the rotating hole; wherein the rotating seat is provided with a plurality of through holes;

[0011] A plurality of intake pipes are evenly arranged on the rotating seat and outside the combustion chamber; wherein one end of the plurality of intake pipes is arranged in a corresponding through hole and communicates with the combustion chamber through the through hole;

[0012] A plurality of fan blades are evenly arranged on the circumference of the rotating seat and outside the combustion chamber;

[0013] an igniter, which is provided on a side of the rotating seat facing the combustion chamber and is used to ignite the combustible gas in the combustion chamber;

[0014] An exhaust passage is arranged on the outside of the device body and is communicated with the combustion chamber for discharging the gas generated after combustion.

[0015] A further technical solution is to further include:

[0016] The first one-way valve is arranged at one end of the plurality of air intake pipes away from the rotating seat, and is used to prevent gas from flowing back.

[0017] A further technical solution is to further include:

[0018] a rotating disk disposed in the plurality of intake pipes and having a direction perpendicular to the axis of the intake pipes as a rotation center;

[0019] Wherein, a plurality of gas mixing holes are opened on the rotating disk.

[0020] A further technical solution is that the multiple intake pipes are rotatably arranged in the through hole around the axis.

[0021] A further technical solution is to further include:

[0022] a plurality of transmission gear rings, which are sleeved on the corresponding plurality of intake pipes;

[0023] A power member is provided on a side of the rotating seat away from the combustion chamber and has a rotatable power end;

[0024] a gear, disposed on the power end and meshing with the plurality of transmission gear rings to drive the plurality of intake pipes to rotate synchronously;

[0025] The second one-way valves are evenly arranged around the plurality of air intake pipes to adjust the airflow direction and further prevent the gas from flowing back.

[0026] A further technical solution is to further include:

[0027] A plurality of curved pipes, each of which is located on one side of the combustion chamber and has one end connected to the through hole and the other end bent and extended from a horizontal direction to a vertical direction;

[0028] The gas gathering ignition tube is sleeved on the outside of the igniter, and the peripheral side of the gas gathering ignition tube is connected with the other ends of the multiple bent tubes, and is used to gather the combustible gas during ignition.

[0029] A further technical solution is to further include:

[0030] A plurality of gas collecting pipes having a large diameter end and a small diameter end;

[0031] Wherein, the plurality of gas collecting pipes are connected with the other end of the corresponding elbow through the large-diameter end;

[0032] Multiple dispersion pipes, both ends of which are blocked and the peripheral sides are connected to the corresponding small-diameter ends;

[0033] Wherein, the plurality of dispersion pipes are each provided with a plurality of nozzles, and the plurality of nozzles extend through the gas gathering and ignition pipe;

[0034] a baffle, provided at one end of the gas gathering and ignition tube close to the rotating seat;

[0035] Wherein, the baffle is provided with an ignition hole;

[0036] The igniter extends into the gas gathering ignition tube through the ignition hole.

[0037] A further technical solution is to further include:

[0038] Wherein, the partition plate is provided with a partition hole;

[0039] One end of the gas gathering ignition tube away from the rotating seat is arranged in the partition hole;

[0040] The first solenoid valve is arranged in the partition hole and is used to control the communication state between the gas gathering ignition tube and the extrusion chamber.

[0041] A further technical solution is to further include:

[0042] a telescopic member, disposed in the extrusion chamber along a height direction and having a telescopic end that is telescopic;

[0043] An extrusion plate is provided on the telescopic end and arranged horizontally;

[0044] The height position of the extrusion plate is lower than the partition hole.

[0045] A further technical solution is that a return air cavity is formed between the first solenoid valve and the end of the gas gathering ignition tube away from the rotating seat; a plurality of serpentine return air ducts are opened inside the partition, and the plurality of serpentine return air ducts are located above the partition hole; one end of the plurality of serpentine return air ducts are connected to the return air cavity, and the other end of the plurality of serpentine return air ducts passes through the partition and is connected to the extrusion chamber; a second solenoid valve is provided in the exhaust duct.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. This solution features a rotating hole on one side of the combustion chamber, with a rotating base coaxially mounted within it. This structurally makes the rotating base the core moving component connecting the exterior of the device with the combustion chamber. Multiple through-holes are formed in the rotating base, and multiple intake pipes are installed outside these holes. One end of the intake pipe communicates with the combustion chamber, while the other end rotates with the rotating base outside the device. Furthermore, multiple blades are evenly spaced around the rotating base, ensuring that the intake pipe entrance is directly within the negative pressure zone of the vortex created by the rotating blades.

[0048] 2. Because the intake duct, fan blades, and through-hole structure are integrated on the rotating base, the fan blades continuously and stably form a negative pressure vortex at the front end of the intake duct during the rotation of the rotating base, helping to accelerate the intake of gas through the intake duct and its introduction into the combustion chamber. Unlike the static intake method used in existing technologies, this solution achieves a synergistic linkage between the intake process and the negative pressure generation process through structural integration and kinematic coupling. This allows for more direct gas introduction and a shorter path, which helps improve intake efficiency and enhance the stability of natural gas and exhaust gas introduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0050] Figure 1 It is a three-dimensional diagram of the combustion device of the present invention.

[0051] Figure 2 3D view of the combustion device of the present invention with the maintenance panel removed.

[0052] Figure 3 It is a local three-dimensional diagram of the rotating seat of the present invention.

[0053] Figure 4 This is a three-dimensional diagram from another perspective of the rotating seat of the present invention.

[0054] Figure 5 This is a three-dimensional diagram of the connection between the elbow and the gas gathering and ignition tube of the present invention.

[0055] Figure 6 It is a three-dimensional diagram of the local structure of the intake pipe of the present invention.

[0056] Figure 7 It is a top view of the separator of the present invention.

[0057] Figure 8 For the present invention Figure 7 Cross-sectional view of the middle partition along the BB direction.

[0058] Figure 9 For the present invention Figure 7 Cross-sectional view of the middle partition along the CC direction.

[0059] Icons: 1-Device body, 2-Rotating seat, 3-Intake pipe, 4-Fan blades, 5-Ignition, 6-Driven gear ring, 7-Driving motor, 8-Limiting ring, 9-First one-way valve, 10-Rotating disk, 11-Intake motor, 12-Transmission gear ring, 13-Power part, 14-Rotating gear, 15-Bend pipe, 16-Gas gathering ignition pipe, 17-Gas gathering pipe, 18-Nozzle, 19-Baffle, 20-Partition, 21-Extrusion chamber, 22-Partition hole, 23-First solenoid valve, 24-Telescopic part, 25-Extrusion plate, 26-Return air chamber, 27-Serpentine return air duct, 28-Controller, 29-Maintenance panel. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be 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.

[0061] Example:

[0062] like Figures 1 to 9 As shown, the present invention provides a sealed combustion device based on negative pressure gas collection, including a device body 1, which is provided with a combustion chamber inside; a rotating hole is provided on one side of the combustion chamber, and a coaxially rotatable rotating base 2 is installed in the rotating hole; three through holes are opened on the rotating base 2, and three intake pipes 3 are evenly installed on the outside thereof; one end of the three intake pipes 3 is passed through the through hole so that they can be connected with the combustion chamber to realize the suction of external natural gas and exhaust gas; a plurality of fan blades 4 are also evenly provided in the circumference of the rotating base 2, which cooperate with the intake pipe 3 and utilize the negative pressure generated by the rotation to realize the efficient collection of natural gas and exhaust gas.

[0063] An igniter 5 is installed on the side of the rotating base 2 facing the combustion chamber, which is used to ignite the combustible gas entering the combustion chamber. At the same time, in order to discharge the exhaust gas after combustion, an exhaust duct is provided on the right side of the device body 1 and is connected to the combustion chamber to ensure smooth exhaust of the exhaust gas and avoid backlog.

[0064] Specifically, a driven gear ring 6 is mounted on one side of the rotating base 2 within the combustion chamber, and a driving motor 7, which can be a servo motor, is mounted on the inner sidewall of the combustion chamber. A driving gear is mounted on the power end of the driving motor 7, and the driving gear meshes with the driven gear ring 6. By providing the driving motor 7 to drive the driven gear ring 6, the rotating base 2 can be precisely driven and controlled, so that the suction pipe 3 and the fan blades 4 rotate in conjunction, thereby generating a stable negative pressure suction effect.

[0065] Specifically, a limiting groove is coaxially defined in the wall of the rotating hole, and a limiting ring 8 is fixed to the circumference of the rotating seat 2. The rotating seat 2 is rotatably connected within the limiting groove via the limiting ring 8. The coaxial arrangement of the limiting groove and the limiting ring 8 provides axial and radial limiting support for the rotating seat 2, preventing eccentricity or shaking during rotation. This helps maintain stable communication between the intake pipe 3 and the combustion chamber, further ensuring the airtightness of the airflow path and rotational stability, and improving the overall structural reliability of the device.

[0066] The principle and beneficial effects of the above technical solution:

[0067] This solution features a rotating hole on one side of the combustion chamber, with a rotating base 2 coaxially mounted within it. This structurally makes the rotating base 2 the core moving component connecting the exterior of the device with the combustion chamber. Multiple through-holes are formed in the rotating base 2, and multiple intake pipes 3 are mounted outside these holes. One end of each intake pipe 3 communicates with the combustion chamber, while the other end rotates with the rotating base 2 outside the device. Furthermore, multiple blades 4 are evenly spaced around the rotating base 2, ensuring that the inlet of the intake pipe 3 is directly within the negative pressure zone of the vortex created by the rotating blades 4.

[0068] Because the intake pipe 3, fan blades 4, and through-hole structure are integrated with the rotating base 2, the fan blades 4 continuously and stably form a negative pressure vortex at the front end of the intake pipe 3 as the active motor 7 drives the rotating base 2 to rotate, helping to accelerate the intake of gas through the intake pipe 3 and its introduction into the combustion chamber. Unlike the static intake method used in the prior art, this solution achieves a synergistic linkage between the intake process and the negative pressure generation process through structural integration and kinematic coupling. This allows for more direct gas introduction and a shorter path, which helps improve intake efficiency and enhance the stability of natural gas and exhaust gas introduction.

[0069] In this embodiment, a first one-way valve 9 is installed at one end of each intake pipe 3 away from the rotating seat 2. The first one-way valve 9 is a spring-loaded one-way valve used to prevent the natural gas and exhaust gas entering the intake pipe 3 from flowing back.

[0070] In this embodiment, a rotating disk 10 is provided in each intake pipe 3. Each rotating disk 10 is rotatably connected to the intake pipe 3 via two rotating shafts at its ends. The rotating disk 10 rotates perpendicular to the axis of the intake pipe 3. Each rotating disk 10 has a plurality of mixing holes.

[0071] Specifically, an air suction motor 11 is installed on the circumference of each air suction pipe 3. The power end of the air suction motor 11 rotates and extends into the air suction pipe 3 and is coaxially connected to one of the rotating shafts. The air suction motor 11 can be a servo motor.

[0072] The principle and beneficial effects of the above technical solution:

[0073] The intake motor 11 can drive the rotating shaft to rotate, thereby driving the rotating disk 10 to rotate in a direction perpendicular to the axis of the intake pipe 3. Cooperating with the multiple mixing holes opened on the rotating disk 10, after the gas is sucked into the intake pipe 3, it is passively or actively guided to pass through the rotating rotating disk 10. Under the combined action of the rotating centrifugal force and the disturbance of the mixing holes, the gas flow field will produce vortexes, shears and local pressure difference changes, thereby promoting mixing or uniform distribution between different component gases, which can reduce local gas concentration fluctuations and improve the consistency and uniformity of the combustible gas.

[0074] In this embodiment, multiple intake pipes 3 are arranged in the through hole to rotate around the axis; specifically, a transmission gear ring 12 is provided on the outer sleeve of each intake pipe 3; a power part 13 is provided on the side of the rotating seat 2 away from the combustion chamber, and the power part 13 has a rotatable power end, and the power part 13 can optionally use a servo motor; a rotating gear 14 is coaxially installed on the power end, and the rotating gear 14 is engaged with multiple transmission gear rings 12 to drive the multiple intake pipes 3 to rotate synchronously; multiple second one-way valves are installed on the circumferential side of each intake pipe 3, and the second one-way valve is a spring-loaded one-way valve, which is used to prevent the natural gas and exhaust gas entering the intake pipe 3 from flowing back.

[0075] The principle and beneficial effects of the above technical solution:

[0076] The power part 13 can drive the rotating gear 14 to rotate, driving the transmission gear ring 12 to rotate, so that each intake pipe 3 has its own axial rotation function. Combined with the multiple second one-way valves arranged on the circumference of the intake pipe 3, the one-way intake angle and intake timing can be dynamically adjusted during the rotation of the intake pipe 3, which helps to improve the intake smoothness of natural gas or exhaust gas in a high-speed environment and effectively prevent backflow.

[0077] Multiple intake pipes 3 are meshed and connected with the power member 13 through an external transmission gear ring 12, so that they can rotate synchronously around their own axes; multiple second one-way valves are installed on the circumferential side of the intake pipe 3, and the one-way valves are used to guide external natural gas or exhaust gas into the interior of the intake pipe 3 in a tangential direction during the intake process. When the power member 13 drives the intake pipe 3 to rotate, the one-way valve continuously introduces gas into the rotating intake pipe 3, causing the gas to form a stable rotating vortex inside it along the wall of the intake pipe 3. Because the rotating vortex is affected by the negative pressure generated by the rotation of the intake pipe 3 and the coordinated rotation of the external fan blades 4, it can cause a significant disturbance shear effect during the intake stage, which helps to enhance the degree of mixing between different gas sources. Furthermore, the rotating vortex forms a wall-adhering flow path inside the intake pipe 3, reducing the probability of stagnation and backflow, and improving the continuity and stability of the gas flow field, which can provide better combustion conditions for the subsequent ignition process.

[0078] In this embodiment, each through hole is connected to a bend pipe 15 located in the combustion chamber, and the end of the bend pipe 15 away from the through hole is bent and extended from the horizontal direction to the vertical direction; the ends of multiple bend pipes 15 away from the through hole are connected to the same gas gathering ignition pipe 16; the gas gathering ignition pipe 16 is sleeved on the outside of the igniter 5 and is used to concentrate the combustible gas during ignition.

[0079] The principle and beneficial effects of the above technical solution:

[0080] Because the ratio of natural gas to exhaust gas drawn into each intake pipe 3 may vary, even if initial gas mixing is achieved within each intake pipe 3, this does not guarantee a consistent overall mixing of the gases ultimately entering the gas gathering and ignition pipe 16 through the elbow 15. To address this issue, the igniter 5 is controlled to set a delayed ignition time. Specifically, after the gases converge in the gas gathering and ignition pipe 16, ignition is not immediately initiated. Instead, a reasonable ignition delay is set to allow the combustible gases from different sources to remain and flow further within the gas gathering and ignition pipe 16.

[0081] The gas-gathering ignition tube 16 is cylindrical and fits over the igniter 5. Its inner wall creates a wall-coiling swirl effect and converges the incoming gas, forcing the gas introduced from the various bends 15 to adhere to the inner wall and spirally converge. This temporal delay combined with the spatial rotational convergence further enhances the uniformity of the mixing of natural gas and exhaust gas prior to ignition.

[0082] In this embodiment, a gas collecting tube 17 is provided at one end of each bend 15 close to the gas collecting ignition tube 16; the gas collecting tube 17 has a large-diameter end and a small-diameter end; the large-diameter end of each gas collecting tube 17 is connected to the end of the bend 15 close to the gas collecting ignition tube 16; the small-diameter end of each gas collecting tube 17 is connected to a dispersion tube with both ends blocked; the arrangement direction of the dispersion tube is parallel to the gas collecting ignition tube 16; a plurality of nozzles 18 are provided on the circumference of each dispersion tube; air inlet holes are arranged radially on the circumference of the gas collecting ignition tube 16; each nozzle 18 extends into the tube of the gas collecting ignition tube 16 through the air inlet hole; a baffle 19 is fixed to the end of the gas collecting ignition tube 16 close to the rotating seat 2, and an ignition hole is opened on the baffle 19; the igniter 5 extends into the gas collecting ignition tube 16 through the ignition hole.

[0083] The principle and beneficial effects of the above technical solution:

[0084] The gas gathering pipe 17 is arranged, so that the gas guided through the elbow pipe 15 enters the gas gathering pipe 17 first and generates a compressed flow in the process of gradually shrinking the pipe diameter, further improving the kinetic energy of the gas before entering the gas gathering ignition pipe 16; then the gas is sprayed into the inside of the gas gathering ignition pipe 16 from different directions in a uniform and distributed manner through the multiple nozzles 18 in the dispersion pipe, which helps to form a gas flow field with more reasonable spatial distribution and more uniform concentration in the area. At the same time, the gas gathering ignition pipe 16 is provided with a baffle 19 with an ignition hole at one end close to the rotating seat 2, and the igniter 5 is inserted through the ignition hole, so that the ignition position can be limited at one end of the gas gathering area, and the flame is promoted to spread from the injection end to the converging end, thereby improving the directionality and stability of the ignition control.

[0085] In addition, the multiple nozzles 18 are arranged on the circumferential side of the dispersion pipe and are aligned with the multiple gas inlets in the gas gathering ignition pipe 16 at different distribution positions. The dispersed injection structure can make the combustible gas from different sources injected into the inside of the gas gathering ignition pipe 16 through multiple paths, thereby forming a multi-point disturbance and mutual shearing flow superposition area in the cavity. Compared with the single-point or single-direction gas supply mode, the gas sprayed by the multiple nozzles 18 is injected in a surrounding manner in space, and a vortex and entrainment effect is quickly generated in the inside of the gas gathering ignition pipe 16.

[0086] Since the gas flow rate sprayed by each nozzle 18 has a certain balance, and the injection direction is distributed in a ring direction and a radial direction, a highly turbulent mixing area can be formed in a short time after the intersection, so that the natural gas and the exhaust gas are more fully mixed before ignition.

[0087] It can be seen that the multiple-nozzle 18 injection mode helps to improve the gas mixing uniformity in the gas gathering ignition pipe 16, avoid the generation of local rich or lean combustion phenomenon, thereby improving the combustion consistency at the initial stage of ignition and the stability of flame propagation, and further enhancing the ignition success rate and combustion efficiency of the entire device.

[0088] In the embodiment, a partition plate 20 is arranged in the combustion chamber, for dividing the combustion chamber into a main combustion chamber and an extrusion chamber 21; the side of the partition plate 20 away from the rotating seat 2 is the extrusion chamber 21, and the other side of the partition plate 20 is the main combustion chamber; the partition plate 20 is horizontally provided with a partition hole 22; the end of the gas gathering ignition pipe 16 away from the rotating seat 2 is rotatably arranged in the partition hole 22; a first electromagnetic valve 23 is arranged in the partition hole 22, for controlling the communication state between the gas gathering ignition pipe 16 and the extrusion chamber 21.

[0089] Principles and beneficial effects of the above technical solutions:

[0090] The gas-gathering ignition tube 16 serves as a controllable passage connecting the extrusion chamber 21 and the main combustion chamber. When the first solenoid valve 23 is closed, the gas within the gas-gathering ignition tube 16 is sealed and stored, preventing the mixed gas from prematurely leaking into the extrusion chamber 21 and improving mixing quality and safety. When the first solenoid valve 23 is open, the mixed gas ignites and burns within the gas-gathering ignition tube 16. The rotatable mounting of the gas-gathering ignition tube 16 within the partition hole 22 allows for gas injection or rotational disturbance, further enhancing the guidance and stability of the mixed gas flow.

[0091] When the first solenoid valve 23 is opened to a small degree, the extrusion chamber 21 acts as a buffer zone for the combustion gas release path, and its exhaust flow rate is actively slowed, resulting in a brief "backpressure retention" state between the main combustion chamber and the gas-gathering ignition tube 16. This prevents the mixed gas in the gas-gathering ignition tube 16 from being immediately and rapidly emptied after ignition, but instead maintains a longer residence time under the action of the ignition energy. This combustion retention characteristic helps promote further reaction of residual components in the gas, improving combustion completeness. At the same time, due to the reduced pressure gradient and slower flow rate, the residual unburned gas in the gas-gathering ignition tube 16, which is still in a continuously disturbed state, has the opportunity to continuously contact the flame front, thereby enhancing the secondary mixing and burnout process.

[0092] In this embodiment, a telescopic member 24 is vertically installed in the extrusion chamber 21 and has a telescopic end. The telescopic member 24 can be an electric cylinder; a horizontally arranged extrusion plate 25 is installed on the telescopic end; the height position of the extrusion plate 25 is lower than the partition hole 22, so that after the burned gas enters the extrusion chamber 21 through the gas gathering ignition tube 16, it is allowed to temporarily stay in the area above the extrusion plate 25 and form a gas buffer layer with a certain pressure.

[0093] The principle and beneficial effects of the above technical solution:

[0094] After the burned gas enters the extrusion chamber 21, it flows toward the top of the extrusion plate 25. After storing a portion of the gas, the first solenoid valve 23 is closed, and then the telescopic end of the telescopic member 24 is controlled to drive the extrusion plate 25 to move upward, mechanically compressing the gas in the extrusion chamber 21, thereby accelerating the discharge speed of the gas through the exhaust duct.

[0095] In this embodiment, a return air chamber 26 is formed between the first solenoid valve 23 and the end of the gas gathering ignition tube 16 away from the rotating seat 2, and the return air chamber 26 is located in the partition hole 22; a plurality of serpentine return air channels 27 are opened inside the partition 20, and the plurality of serpentine return air channels 27 are located above the partition hole 22; one end of the plurality of serpentine return air channels 27 are all connected to the return air chamber 26, and the other end of the plurality of serpentine return air channels 27 passes through the partition 20 and is connected to the extrusion chamber 21; a second solenoid valve is provided in the exhaust duct.

[0096] The principle and beneficial effects of the above technical solution:

[0097] To ensure complete combustion of the exhaust gas, the present invention incorporates an exhaust gas recirculation and secondary ignition mechanism. The control process is as follows: First, the second solenoid valve is closed, temporarily blocking the exhaust path and trapping the combusted exhaust gas within the extrusion chamber 21. Subsequently, the first solenoid valve 23 is closed to prevent new combustible gas from entering the main combustion path. Simultaneously, the active motor 7 is stopped, cutting off the air intake to the intake pipe 3 and creating a stable exhaust gas reprocessing environment.

[0098] Next, the control telescopic member 24 drives the extrusion plate 25 upward, mechanically compressing the exhaust gas within the extrusion chamber 21. During this upward movement, the extrusion plate 25 maintains a gap with the top wall of the extrusion chamber 21, allowing the exhaust gas to be guided under pressure into the serpentine channels arranged at the top. These serpentine channels connect to a return air chamber 26, which communicates with the gas concentration and ignition tube 16. This allows the gas to be re-concentrated before entering the ignition zone and remixed with the exhaust gas from different channels.

[0099] After the gases converge, igniter 5 is controlled to ignite, achieving secondary combustion of the exhaust gases. Because the flame propagates along the serpentine channel, it can ignite any remaining unburned gases within the channel during the ignition process, avoiding energy waste caused by localized leakage and residual hydrocarbons. After secondary combustion is complete, the second solenoid valve is controlled to reopen, discharging the post-combustion exhaust gases through the exhaust duct.

[0100] This allows the residual gases from different serpentine channels to form a disturbed mixture in the return air chamber 26, and the flame propagates along the serpentine channel to ignite the residual combustible gas therein, thereby effectively improving the mixing uniformity and burnout degree of the exhaust gas, avoiding energy waste and harmful emissions, and improving the overall combustion efficiency and emission control capabilities.

[0101] In this embodiment, a controller 28 is installed on the outside of the device body 1, and a PLC is provided in the controller 28. The igniter 5, the active motor 7, the suction motor 11, the first solenoid valve 23, the second solenoid valve and the telescopic member 24 are all electrically connected to the PLC.

[0102] Optionally, a maintenance port is opened on the outer side of the device body 1 , and a maintenance plate 29 is connected to the outer side wall of the device body 1 by bolts, and the controller 28 is installed on the outer side wall of the maintenance plate 29 .

[0103] The principle and beneficial effects of the above technical solution:

[0104] The present invention includes a controller 28 located outside the device body 1. This controller integrates a programmable logic controller (PLC). The PLC is electrically connected to the igniter 5, the active motor 7, the intake motor 11, the first solenoid valve 23, the second solenoid valve, and the telescopic member 24, forming a centralized control system for the entire combustion device. The PLC can implement time-sharing or linkage control of each actuator based on pre-set program logic, achieving automated management of the entire process from gas intake, mixing, ignition, combustion, exhaust, to secondary combustion.

[0105] The PLC's multi-channel input and output interface receives sensor feedback (such as temperature, pressure, and gas concentration) and adjusts the speed of the active motor 7, the operating status of the intake motor 11, the on-off timing and opening of the solenoid valve, and the compression rhythm of the telescopic member 24 in real time. It also precisely controls the activation timing of the igniter 5 during the primary or secondary combustion phase. (The specific control methods are known in the art and will not be elaborated on here.)

[0106] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or layout of the subject combination arrangement. In addition to variations and modifications to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A sealed combustion device based on negative pressure gas extraction, characterized in that: include: The device body has a combustion chamber inside, wherein a rotation hole is provided on one side of the combustion chamber; A rotating seat is rotatably mounted in the rotating hole; wherein the rotating seat is provided with a plurality of through holes; A plurality of intake pipes are evenly arranged on the rotating seat and located outside the combustion chamber; wherein one end of the plurality of intake pipes is arranged in a corresponding through hole and communicates with the combustion chamber through the through hole; the plurality of intake pipes are arranged in the through hole so as to rotate around the axis; A plurality of fan blades are evenly arranged on the circumference of the rotating seat and outside the combustion chamber; an igniter, which is provided on a side of the rotating seat facing the combustion chamber and is used to ignite the combustible gas in the combustion chamber; an exhaust duct, which is provided on the outside of the device body and communicates with the combustion chamber and is used to discharge the gas generated after combustion; a plurality of transmission gear rings, which are sleeved on the corresponding plurality of intake pipes; A power member is provided on a side of the rotating seat away from the combustion chamber and has a rotatable power end; a gear, disposed on the power end and meshing with the plurality of transmission gear rings to drive the plurality of intake pipes to rotate synchronously; The second one-way valves are evenly arranged around the plurality of air intake pipes to adjust the airflow direction and further prevent the gas from flowing back.

2. A sealed combustion device based on negative pressure gas extraction according to claim 1, characterized in that: Also includes: The first one-way valve is arranged at one end of the plurality of air intake pipes away from the rotating seat, and is used to prevent gas from flowing back.

3. A sealed combustion device based on negative pressure gas extraction according to claim 1 or 2, characterized in that: Also includes: a rotating disk disposed in the plurality of intake pipes and having a direction perpendicular to the axis of the intake pipes as a rotation center; Wherein, a plurality of gas mixing holes are opened on the rotating disk.

4. A sealed combustion device based on negative pressure gas extraction according to claim 1, characterized in that: Also includes: A plurality of curved pipes, each of which is located on one side of the combustion chamber and has one end connected to the through hole and the other end bent and extended from a horizontal direction to a vertical direction; The gas gathering ignition tube is sleeved on the outside of the igniter, and the peripheral side of the gas gathering ignition tube is connected with the other ends of the multiple bent tubes, and is used to gather the combustible gas during ignition.

5. A sealed combustion device based on negative pressure gas extraction according to claim 4, characterized in that: Also includes: A plurality of gas collecting pipes having a large diameter end and a small diameter end; Wherein, the plurality of gas collecting pipes are connected with the other end of the corresponding elbow through the large-diameter end; Multiple dispersion pipes, both ends of which are blocked and the peripheral sides are connected to the corresponding small-diameter ends; Wherein, the plurality of dispersion pipes are each provided with a plurality of nozzles, and the plurality of nozzles extend through the gas gathering and ignition pipe; a baffle, provided at one end of the gas gathering and ignition tube close to the rotating seat; Wherein, the baffle is provided with an ignition hole; The igniter extends into the gas gathering ignition tube through the ignition hole.

6. A sealed combustion device based on negative pressure gas extraction according to claim 5, characterized in that: Also includes: a partition plate provided in the combustion chamber and used to divide the combustion chamber into a main combustion chamber and an extrusion chamber; Wherein, the partition plate is provided with a partition hole; One end of the gas gathering ignition tube away from the rotating seat is arranged in the partition hole; The first electromagnetic valve is arranged in the partition hole and is used to control the communication state between the gas gathering ignition tube and the extrusion chamber.

7. A sealed combustion device based on negative pressure gas extraction according to claim 6, characterized in that: Also includes: a telescopic member, disposed in the extrusion chamber along a height direction and having a telescopic end that is telescopic; An extrusion plate is provided on the telescopic end and arranged horizontally; The height position of the extrusion plate is lower than the partition hole.

8. The sealed combustion device based on negative pressure gas collection according to claim 7, characterized in that: A return air cavity is formed between the first solenoid valve and the end of the gas gathering ignition tube away from the rotating seat; a plurality of serpentine return air ducts are opened inside the partition, and the plurality of serpentine return air ducts are located above the partition hole; one end of the plurality of serpentine return air ducts are connected to the return air cavity, and the other end of the plurality of serpentine return air ducts passes through the partition and is connected to the extrusion chamber; a second solenoid valve is provided in the exhaust duct.

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