Ignition burner plug-in mechanism

Abstract

The present invention discloses an ignition burner plug-in and pull-out mechanism, including a support frame for supporting the entire plug-in and pull-out mechanism, an actuator for pushing the ignition burner to move, a sealing mechanism and a cut-off valve for isolating the high pressure in the furnace from the external normal pressure; a fixing device for fixing the ignition burner is arranged on the actuator, a guide groove for guiding the fixing device is arranged on the support frame, and the fixing device is driven by the actuator to reciprocate along the guide groove direction; a channel for inserting the ignition end of the ignition burner is coaxially arranged on the sealing mechanism and the cut-off valve. When ignition is required, the ignition burner is pushed to the ignition area through the mechanism for ignition, and when ignition is completed, the ignition burner is withdrawn from the area and the high pressure environment in the furnace is isolated and protected through the cut-off valve. On the one hand, the ignition burner is protected, and on the other hand, the igniter can be replaced without stopping the gasifier, thereby improving the start-up efficiency of the gasifier.

Description

Technical Field

[0001] The invention belongs to the technical field of coal gasification, and in particular relates to an ignition burner plug-in and pull-out mechanism. Background Art

[0002] Fixed bed gasifier is the coal gasification process with the longest history of development. It is a process that reacts raw coal and oxidant to generate synthesis gas with CO and H2 as the main components. With the advancement of technology, advanced fixed bed gasification technology uses pure oxygen as oxidant and lump coal as raw material. Under pressurized conditions, liquid slag discharge is used to improve the conversion rate and energy utilization rate of raw coal. Fixed bed gasifiers using pressurized liquid slag discharge require an external energy input to maintain the fluidity of liquid slag. This external energy input is usually achieved through fuel combustion, and fuel combustion requires ignition to continue to operate. Therefore, at the bottom of the pressurized slag fixed bed gasifier, there is a dedicated equipment to mix and burn fuel gas to provide heat to the slag pool, and there is an ignition burner to ignite it.

[0003] At present, the ignition burner of the fixed bed gasifier is usually installed in a fixed manner. Before the gasifier is started, the ignition burner is fixed on the furnace body and connected and sealed with a flange. When the gasifier is started, the pressure of the gasifier is first increased to the ignition design pressure, and when ignition is required, the medium is introduced for ignition and ignition, thereby realizing the ignition and start-up of the gasifier. The ignition burner is a key step in the production and operation of the gasifier. If the ignition burner fails and causes ignition failure, it will directly cause the gasifier to fail to start.

[0004] The upper part of the ignition burner is the external energy input area with a higher temperature; the lower part is the room temperature quenching water with a lower temperature; the space in this area is relatively narrow and there is a large amount of water vapor. The igniter used in the ignition burner cannot be stored for a long time in a high-pressure and humid environment, which will directly lead to the failure of the igniter. Therefore, the igniter of the existing device is usually used once, and the igniter in the ignition burner is directly replaced when the gasifier is started next time; on the other hand, if the igniter fails, the gasifier can only be stopped and depressurized to achieve the replacement of the igniter, which will lead to a longer start-up process and directly cause certain economic losses. High-pressure igniters are usually more expensive, and the consumables cost caused by the loss of igniters will eventually be converted into the operating cost of the gasifier. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an ignition burner plug-in and pull-out mechanism, which can push the ignition burner to the ignition area for ignition when the gasifier needs to be ignited. When the ignition is completed, the ignition burner is withdrawn from the area and isolated for protection, thereby solving the problem that the existing ignition burner is fixedly installed, causing the ignition burner to malfunction due to corrosion caused by the temperature in the furnace and the high-pressure humid environment.

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

[0007] An ignition burner plug-in and pull-out mechanism, characterized in that it includes a support frame for supporting the entire plug-in and pull-out mechanism, an actuator for pushing the ignition burner to move, a sealing mechanism and a shut-off valve for isolating the high pressure in the furnace from the external normal pressure; the actuator is connected to the support frame, and a fixing device for fixing the ignition burner is provided on the actuator, and a guide groove for guiding the fixing device is provided on the support frame, and the fixing device is driven by the actuator to reciprocate along the direction of the guide groove; the sealing mechanism and the shut-off valve are both fixed on the support frame, and a channel for inserting the ignition end of the ignition burner is coaxially provided on the sealing mechanism and the shut-off valve.

[0008] Specifically, the actuator includes a telescopic rod and a driver for driving the telescopic rod to extend and retract; the fixing device includes a base, a clamping member arranged above the base for clamping the ignition burner, and a guide wheel assembly arranged below the base, the guide wheel assembly is installed in matching with the guide groove on the support frame, one end of the telescopic rod is fixed on the support frame, and the other end is connected to the base.

[0009] Preferably, the clamping member is a universal clamp capable of adaptively adjusting the movement direction of the ignition burner; the universal clamp comprises a clamping ring for clamping the ignition burner and an adjusting ring sleeved on the outside of the clamping ring, the clamping ring is symmetrically provided with vertical arms, the adjusting ring is symmetrically provided with transverse arms, the adjusting ring is also provided with a through hole for the vertical arms to pass through, an adjustment gap is provided between the clamping ring and the adjusting ring, wherein the vertical arm located at the base is a free end, and the other vertical arm is connected to a vertical spring assembly provided on the adjusting ring, and the movement of the vertical arm is achieved by the expansion and contraction of the spring; the base is a concave plate, and transverse spring assemblies that expand and contract in the transverse direction are provided on both side walls of the concave plate, the transverse arms are connected to the transverse spring assemblies, and the movement of the transverse arms is achieved by the expansion and contraction of the spring.

[0010] Specifically, the support frame is a vertically arranged plate, a guide plate is arranged above one end of the plate, the guide grooves are symmetrically arranged on the guide plate, and the positions of the guide grooves match the guide wheels.

[0011] Specifically, the sealing mechanism includes a sealing valve, a first pipeline and a second pipeline for introducing protective gas behind the valve. The sealing valve, the first pipeline, the cut-off valve and the second pipeline are coaxially connected in sequence. The through holes on the sealing valve, the first pipeline, the cut-off valve and the second pipeline are coaxially connected to form a channel for inserting the ignition end of the ignition burner; the first pipeline and the second pipeline are both provided with air inlet holes; the cut-off valve and the second pipeline are provided with a docking flange for docking with the furnace body.

[0012] More specifically, the sealing valve, the first pipeline, the cut-off valve and the second pipeline are butt-jointed via a connecting flange, and the second pipeline is also provided with a butt-jointed flange for butt-jointing with the furnace body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The movement of the ignition burner is achieved through the plug-in mechanism of the present invention. When ignition is required, the ignition burner is pushed to the ignition area through the mechanism for ignition. When ignition is completed, the ignition burner is withdrawn from the area and the isolation protection of the high-pressure environment in the furnace is achieved through the cut-off valve. On the one hand, the ignition burner is protected, and on the other hand, the igniter can be replaced without stopping the gasifier, thereby improving the start-up efficiency of the gasifier.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the ignition burner plugging and pulling mechanism of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the actuator of the plugging and pulling mechanism of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the fixing device of the plugging and pulling mechanism of the present invention.

[0019] Figure 4 It is a cross-sectional view of the connection between the sealing valve and the cut-off valve.

[0020] Figure 5 It is a schematic diagram of the state of the plug-in and pull-out mechanism when the ignition burner is not ignited.

[0021] Figure 6 It is a schematic diagram of the state of the plug-in and pull-out mechanism when the ignition burner is ignited.

[0022] The reference numerals in the figure are as follows: 1-support frame, 3-sealing mechanism, 4-cut-off valve, 5-channel, 6-ignition burner, 7-furnace body;

[0023] 101-guide groove, 102-guide plate;

[0024] 201-fixing device, 202-telescopic rod, 203-driver, 204-base, 207-clamping ring, 208-adjusting ring, 209-vertical arm, 210-lateral arm, 211-vertical spring assembly, 212-lateral spring assembly;

[0025] 301 - sealing valve, 302 - first pipeline, 303 - second pipeline, 304 - air inlet, 305 - connecting flange, 306 - docking flange.

[0026] The specific contents of the present invention are further explained in detail below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0027] The plug-in and pull-out mechanism of the present invention can be used for pushing the central ignition burner of a fixed-bed crushed coal slag pressurized gasification furnace, and can also be used in systems in other fields that are used intermittently and need to protect the burner when not in use. Specifically, the burner is used intermittently, and the environment in which the burner is located when it is not in use affects the preservation and life of the burner. The burner can be protected by pulling it out.

[0028] The specific implementation methods of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0029] In the present invention, unless otherwise specified, directional words such as "up, down", "horizontal, vertical" are usually defined based on the drawings of the corresponding figures, and "inside, outside" are defined based on the outline of the corresponding figures.

[0030] like Figure 1 As shown, the present invention provides an ignition burner plug-in and pull-out mechanism. In a specific implementation scheme, the plug-in and pull-out mechanism includes a support frame 1 for supporting the entire plug-in and pull-out mechanism, an actuator for pushing the ignition burner 6 to move, a sealing mechanism 3 and a shut-off valve 4 for isolating the high pressure in the furnace from the external normal pressure. Among them, the actuator is connected to the support frame 1, and a fixing device 201 for fixing the ignition burner 6 is provided on the actuator. The sealing mechanism 3 and the shut-off valve 4 are arranged above the other end of the support frame 1, and are specifically supported above the telescopic rod 101 by a bracket fixed on the support frame 1. Since the ignition burner works in a high-pressure environment, the sealing mechanism 3 needs to achieve a good sealing function during the pushing and withdrawing execution of the ignition burner to prevent the leakage of high-pressure gas in the furnace. The shut-off valve is used to isolate the ignition burner from the high-pressure environment of the gasifier. It is in a closed state when the ignition burner is not working, and is opened when the ignition burner needs to enter the furnace to work.

[0031] In a specific embodiment of the present invention, Figure 2 As shown, the actuator includes a telescopic rod 202 and a driver 203 for driving the telescopic rod 202 to extend and retract. Specifically, the telescopic rod 202 is composed of a transmission worm and a push-pull rod. The driver 203 is a motor, and the extension direction of the push-pull rod is controlled by controlling the steering direction of the motor.

[0032] like Figure 1As shown, the support frame 1 is a vertically arranged plate, and a guide plate 102 is arranged above one end of the plate. A guide groove 101 is symmetrically arranged on the guide plate 102, and the position of the guide groove 101 matches the position of the guide wheel assembly. The support frame is used to support the entire plug-in mechanism. The cooperation of the guide groove and the guide wheel can prevent the cantilever effect caused by the ignition burner withdrawing to the far end from affecting the track positioning. In order to increase the connection strength between the support frame plate and the guide plate, a stiffening rib is set at the connection between the two.

[0033] like Figure 3 As shown, the fixing device 201 includes a base 204, a clamping member arranged above the base 204 for clamping the ignition burner 6, and a guide wheel assembly arranged below the base. The guide wheel assembly is matched and installed with the guide groove 101 on the support frame, wherein the length of the guide groove 101 is determined according to the moving range of the ignition burner 6. The moving end of the telescopic rod 202 is fixed on the support frame 1, and the other end is fixed on the base 204. The base 204 is a concave plate, and connecting holes are arranged on the two side walls of the concave plate. Two first ear plates 209 are symmetrically arranged above the plate, and the clamping member is connected to the two first ear plates 209. Two ear plates are symmetrically arranged below the base 204, and a pair of guide wheel assemblies are fixed on the ear plates. The telescopic rod 202 is arranged above the guide plate 102, and the base 204 is arranged above the telescopic rod 202.

[0034] As a preferred solution of the present invention, the clamping member is a universal clamp capable of adaptively adjusting the movement direction of the ignition burner 6. The universal clamp is a device with a certain elastic margin in both the horizontal and vertical directions. The ignition burner is fixed at the center of the device. Due to various factors such as on-site installation accuracy, thermal expansion and contraction, the burner may have deviations in the moving direction. Therefore, the universal clamp is used to overcome the possible deviation between the moving direction of the burner and the axial direction of the burner. Theoretically, the moving direction must be kept parallel to the axial direction to prevent the burner from being subjected to torque and then damaged. Specifically, in this embodiment, the universal clamp includes a clamping ring 207 for clamping the ignition burner 6 and an adjustment ring 208 sleeved on the outside of the clamping ring. The clamping ring 207 is symmetrically provided with vertical arms 209, and the adjustment ring 208 is symmetrically provided with horizontal arms 210. The adjustment ring 208 is also provided with a through hole for the vertical arm 209 to pass through, and an adjustment gap is provided between the clamping ring 207 and the adjustment ring 208. Among them, the bottom of the base is also provided with a hole for the vertical arm at the base to move, so that the vertical arm at this end is a free end, so that it can move in the vertical direction without restriction; the other vertical arm 209 is connected to the vertical spring assembly 211 set on the adjustment ring, and the movement of the vertical arm 209 is realized by the expansion and contraction of the spring; the connecting holes on both sides of the concave base are provided with a transverse spring assembly 212 that expands and contracts in the transverse direction, and the transverse arm 210 is connected to the transverse spring assembly 212, and the movement of the transverse arm 210 is realized by the expansion and contraction of the spring. When there is a deviation from the axial direction of the burner, the vertical arm 209 and the transverse arm 210 and the cooperation with the spring can realize adaptive adjustment in two directions, and can automatically correct the deviation between the movement direction of the ignition burner 6 and the track direction, ensuring that the ignition burner moves in the designed direction.

[0035] like Figure 4 As shown, the sealing mechanism 3 and the cut-off valve 4 are coaxially provided with a channel 5 for inserting the ignition end of the ignition burner 6. The sealing mechanism 3 includes a sealing valve 301, a first pipeline 302 and a second pipeline 303, which are coaxially connected in sequence, for introducing the protective gas behind the valve. The through holes on the sealing valve 301, the first pipeline 302, the cut-off valve 4 and the second pipeline 303 are coaxially connected to form the channel 5 for inserting the ignition end of the ignition burner 6. The first pipeline 302 and the second pipeline 303 are both provided with an air inlet 304 for introducing the protective gas.

[0036] The cut-off valve 4 used in the present invention can be a cut-off ball valve on the market, and the sealing valve 3 is also an existing structural component, and other structural valves that can achieve the functions of the present invention can also be selected.

[0037] In order to facilitate connection, connecting flanges are provided on the sealing valve 301 , the first pipeline 302 , the shut-off valve 4 , and the second pipeline 303 . The four components are butt-jointed via the connecting flange 305 , and a butt-jointed flange 306 is also provided on the second pipeline 303 for butt-jointing with the furnace body 7 .

[0038] For the convenience of control, the plug-in mechanism is also equipped with a control cabinet, which is used to control the switch state of the cut-off valve and the actionable state of the actuator. When the cut-off valve 4 is in the closed state, the actuator cannot be pushed forward; when the actuator is in the pushed state, the cut-off valve 4 cannot be closed. The control cabinet also has a sequential control program. When it is necessary to push in, the system can open the valve-push-in-place feedback-stop action according to the set program. When it is necessary to exit, the system exits-retracts to the position-stop action-close the valve according to the program. The specific functions are added or changed according to the actual situation.

[0039] The operation process of the plugging and unplugging mechanism in one embodiment of the present invention is given below:

[0040] Under normal conditions, according to Figure 5 As shown, after the ignition burner 6 is guided by the actuator to exit to the shut-off valve 4, the shut-off valve 4 isolates the ignition burner 6 from the ignition environment, thereby protecting the ignition burner 6; a protective nitrogen gas is continuously introduced through the second pipeline 303 in front of the shut-off valve 4 to protect the valve body, thereby preventing the high-temperature heat radiation in the furnace from affecting the sealing performance of the shut-off valve 4.

[0041] When the gasifier needs to be ignited, Figure 6 As shown, the shut-off valve 4 is opened, and then the driver 203 drives the telescopic rod 202 to move, driving the ignition burner 6 channel 5 to move to the specified position to prepare for the ignition of the gasifier; when the ignition is completed, the actuator withdraws the ignition burner from the furnace area to the shut-off valve 4, and then closes the shut-off valve 4, thereby realizing the protection of the ignition burner.

[0042] The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An ignition burner plug-in and pull-out mechanism, characterized in that: It comprises a support frame (1) for supporting the entire plug-in and pull-out mechanism, an actuator for pushing the ignition burner (6) to move, a sealing mechanism (3) for isolating the high pressure in the furnace from the external normal pressure, and a shut-off valve (4); The actuator is connected to the support frame (1), a fixing device (201) for fixing the ignition burner (6) is arranged on the actuator, a guide groove (101) for guiding the fixing device (201) is arranged on the support frame (1), and the fixing device (201) is driven by the actuator to reciprocate along the direction of the guide groove (101); the sealing mechanism (3) and the shut-off valve (4) are both fixed to the support frame (1), and a channel (5) for inserting the ignition end of the ignition burner (6) is coaxially arranged on the sealing mechanism (3) and the shut-off valve (4); The actuator comprises a telescopic rod (202) and a driver (203) for driving the telescopic rod (202) to extend and retract; the fixing device (201) comprises a base (204), a clamping member arranged above the base (204) for clamping the ignition burner (6), and a guide wheel assembly arranged below the base, wherein the guide wheel assembly is matched and installed with the guide groove (101) on the support frame; one end of the telescopic rod (202) is fixed on the support frame (1), and the other end is connected to the base (204); The clamping member is a universal clamp capable of adaptively adjusting the movement direction of the ignition burner (6); the universal clamp comprises a clamping ring (207) for clamping the ignition burner (6) and an adjusting ring (208) sleeved on the outside of the clamping ring, the clamping ring (207) is symmetrically provided with vertical arms (209), the adjusting ring (208) is symmetrically provided with horizontal arms (210), the adjusting ring (208) is also provided with a through hole for the vertical arm (209) to pass through, and the clamping ring (207) and the adjusting ring (208) are symmetrically provided with vertical arms (210). An adjustment gap is provided between the two ends of the base, wherein the vertical arm (209) located at the base is a free end, and the other vertical arm (209) is connected to a vertical spring assembly (211) provided on the adjustment ring, and the movement of the vertical arm (209) is achieved by the expansion and contraction of the spring; the base (204) is a concave plate, and the two side walls of the concave plate are provided with a transverse spring assembly (212) that expands and contracts in the transverse direction, and the transverse arm (210) is connected to the transverse spring assembly (212), and the movement of the transverse arm (210) is achieved by the expansion and contraction of the spring; The support frame (1) is a vertically arranged plate, a guide plate (102) is arranged above one end of the plate, the guide grooves (101) are symmetrically arranged on the guide plate (102), and the position of the guide grooves (101) matches the position of the guide wheel assembly; The sealing mechanism (3) comprises a sealing valve (301), a first pipeline (302) and a second pipeline (303) which are coaxially connected in sequence and are used to introduce protective gas behind the valve; the through holes on the sealing valve (301), the first pipeline (302), the cut-off valve (4) and the second pipeline (303) are coaxially connected to form a channel (5) for inserting the ignition end of the ignition burner (6); the first pipeline (302) and the second pipeline (303) are both provided with an air inlet hole (304); The sealing valve (301), the first pipeline (302), the shut-off valve (4), and the second pipeline (303) are butt-jointed via a connecting flange (305), and the second pipeline (303) is also provided with a butt-jointed flange (306) for butt-jointing with the furnace body (7).

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