Coal gas producer with isolation function for coal chemical industry

Abstract

This invention discloses a gasifier with isolation function for coal chemical industry, relating to the field of coal chemical industry. It includes a furnace body and a water-cooled wall mounted on it. A fixed sleeve is fixedly fitted inside the furnace body, with a bed layer at the bottom of the fixed sleeve. The outer wall of the fixed sleeve and the inner wall of the furnace body enclose an annular flow channel for diverting part of the gas flow from the bottom of the furnace body. This gasifier for coal chemical industry, through the synergistic effect of the movable blades and the baffle layer, guides the airflow into a tangential swirling flow with a high velocity at the periphery and a low velocity at the center during low-temperature start-up and low-load operation. This causes low-temperature, loose coke lumps to gather towards the center and enter the baffle layer with the rising airflow. During high-temperature stable operation, the movable blades deflect to a heat-conducting position abutting against the water-cooled wall, rapidly cooling the high-temperature molten ash or alkali metal vapor and causing controlled condensation on the cold wall.

Description

Technical Field

[0001] This invention relates to the field of coal chemical technology, and more specifically to a coal gas generator with isolation function for use in coal chemical industry. Background Technology

[0002] A gasifier is a reactor used to produce coal gas, water gas, and semi-water gas. Structurally, it can be classified into various types, such as mechanical gasifiers and fluidized bed gasifiers. Fluidized bed gasifiers are widely used in the coal chemical industry due to their high heat and mass transfer efficiency and wide fuel adaptability. However, coking is one of the most common failures in the operation of fluidized bed gasifiers, directly affecting the safe and economical operation of the equipment and the gas yield. Based on the causes and conditions of coking, it can generally be divided into two types: low-temperature coking and high-temperature coking.

[0003] In existing technologies, the ash melting characteristics of the fuel fed into the furnace are controlled by optimizing the coal blending ratio; the overall temperature of the feed bed is kept below the ash deformation temperature by adjusting the fluidizing air volume and bed temperature; or a water-coal slurry nozzle with swirl blades is used to create a swirling feed at the top of the furnace to avoid localized high temperatures. Regarding the grate structure, the pagoda-shaped grate is widely used due to its uniform air distribution, good ventilation, and strong slag-breaking ability, especially when gasifying bituminous coal, where its slag-breaking effect is significantly better than other furnace types. In addition, some technologies employ rotating ash pans for automatic slag removal and edge-driven structures to improve combustion uniformity and prevent coking and scaling. However, existing technologies mostly focus on anti-coking measures under single operating conditions—either by lowering the bed temperature to prevent high-temperature melting or by adjusting the air volume to improve the fluidization state and avoid low-temperature agglomeration.

[0004] The same set of equipment is difficult to deal with the problem of loose coke agglomeration and blockage during the low temperature start-up / low load stage and the problem of molten ash condensation and coking during the high temperature stable operation stage at the same time. It usually requires switching different operating parameters or even shutting down the furnace to clean the coke according to the operating conditions. In addition, the existing anti-coking structures are mostly statically arranged and cannot adaptively change the airflow organization and wall thermal state according to the temperature changes in the furnace. Summary of the Invention

[0005] The purpose of this invention is to provide a gas generator with isolation function for use in coal chemical industry, in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gas generator with isolation function for coal chemical industry, comprising a furnace body and a water-cooled wall disposed thereon, wherein a fixed sleeve is fixedly sleeved inside the furnace body, wherein a bed is disposed at the bottom of the fixed sleeve, and the outer wall of the fixed sleeve and the inner wall of the furnace body enclose and form an annular drainage channel for diverting part of the gas flow at the bottom of the furnace body. It also includes a movable page that is rotatably mounted on a fixed sleeve and can extend into an annular drainage channel to form a tangential airflow, the movable page having a heat-conducting station that abuts against the water-cooled wall; The partition layer, located above the active page and used to separate the dense phase zone and the sparse phase zone inside the furnace, is formed by multiple stacked conical cylinders and is configured to switch between a forward pagoda shape and a reverse pagoda shape.

[0007] Preferably, the partition layer includes a snap-fit ​​member fixedly disposed at the bottom end of the conical cylinder and used to abut against the inner wall of the top of the adjacent conical cylinder, and the partition layer protrudes upward when the snap-fit ​​member is in the abutting state; It also includes a fixed scraper that is fixedly installed at the bottom of the conical cylinder and used to engage with the top of the adjacent conical cylinder, and the partition layer is recessed downward when the fixed scraper is engaged.

[0008] Preferably, the partition layer includes an innermost inner cone and an outermost outer cone, wherein the outer cone is connected to the inner wall of the furnace.

[0009] Preferably, the fixed scraper is inclined so that the conical cylinder is driven to rotate by the airflow; The fixed scraper has opposing head and tail ends, wherein the rotation trajectories of the fixed scrapers on adjacent conical cylinders do not interfere with each other.

[0010] Preferably, the conical tube of the spacer layer has a coated inner wall, wherein the coated inner wall side is provided with a plurality of grooves for restricting the circumferential movement of the snap-fit ​​component.

[0011] Preferably, the groove gradually widens in width and narrows in depth from top to bottom, so that the molten material in the groove is forced to extend as it flows downward.

[0012] Preferably, the inner wall of the furnace is slidably provided with a slag-hanging plate for receiving the slag material being thrown off.

[0013] Preferably, the device also includes a mounting base fixedly disposed on the inner wall of the furnace body and used to limit the movement distance of the outer cone, wherein an upper baffle and a lower baffle are fixedly disposed on the mounting base.

[0014] Preferably, the system also includes a transmission mechanism for keeping the movable page and the partition layer moving synchronously. The transmission mechanism includes a fixing member fixedly connected to the outer cone, and a transmission rod located inside the side wall of the furnace body is fixedly installed on the fixing member. The transmission rod is fixedly connected to the slag hanging plate, and the transmission rod is fixedly installed at the bottom end of the slag hanging plate; A protrusion is fixedly provided at the top of the active page, and an arc groove is provided on the protrusion to slide with the transmission rod.

[0015] In the above technical solution, the gas generator with isolation function for coal chemical industry provided by the present invention has the following beneficial effects: 1. Through the synergistic effect of the movable blades and the partition layer, during low-temperature startup and low-load operation, the deflection of the movable blades guides the airflow into a tangential vortex with a high velocity at the periphery and a low velocity at the center, causing the low-temperature loose coke lumps to gather towards the center and enter the partition layer with the rising airflow. During high-temperature stable operation, the movable blades deflect to the heat-conducting position that contacts the water-cooled wall, transferring the low temperature of the water-cooled wall to the central area of ​​the furnace, forming a local cold trap at the inlet of the partition layer, which rapidly cools the high-temperature molten ash or alkali metal vapor and allows it to condense controllably on the cold wall; 2. When the dense phase zone moves upward in a positive pagoda shape, the high-temperature zone also moves upward, which helps to quickly increase the temperature of the entire furnace. When the dense phase zone sinks in a reverse pagoda shape, the high-temperature zone is concentrated near the bed, which reduces the temperature of the upper part of the furnace, reduces NOx formation, and protects the water-cooled walls. 3. The upward airflow's thrust on the fixed scraper is converted into axial vibration of the conical cylinder, preventing coke from adhering to the inner wall of the conical cylinder or the surface of the channel, thus achieving active anti-sticking. In the reverse pagoda shape, the molten slag that has not completely detached is forced to spread into a thinner liquid film during the downward flow, increasing the heat dissipation area and accelerating solidification; at the same time, it breaks the tendency of the molten slag to prematurely agglomerate under the action of surface tension, until it reaches the bottom and agglomerates into uniform droplets, which are then thrown off onto the slag plate by centrifugal force through the rotation of the conical cylinder. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the furnace body provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the active page and fixed sleeve structure provided in an embodiment of the present invention; Figure 4 These are side views of two states of the spacer layer provided in embodiments of the present invention; Figure 5 This is a schematic diagram of the forward pagoda-shaped septum layer structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the reverse pagoda-shaped septum layer structure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the exploded structure of the septum layer provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the inner conical cylinder structure provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the cross-sectional structure of the inner conical cylinder provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the slag-hanging plate structure provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the transmission mechanism provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Furnace body; 11. Cyclone separator; 12. Return pipe; 13. Fixed sleeve; 14. Bed; 15. Water-cooled wall; 16. Slag overflow port; 2. Drive rod; 3. Activity page; 31. Bump; 32. Groove; 4. Spare layer; 4a. Inner cone; 4b. Outer cone; 41. Fixed scraper; 411. Concave part; 412. Head end; 413. Tail end; 42. Snap-fit ​​piece; 43. Groove; 44. Fixing piece; 45. Inner wall of coating; 5. Slag hanging plate; 51. Transmission rod; 6. Mounting base; 61. Upper baffle; 62. Lower baffle; 63. Fixing rod. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] like Figures 1-8 As shown, an energy-saving, environmentally friendly, safe, and efficient device for increasing thermal efficiency to 82% using natural gas (liquefied petroleum gas), achieving ultra-low carbon monoxide emissions of 0-0.02 PPM and energy savings of 35-40% is disclosed. This device is suitable for baking, heating, and household / commercial stoves. Specifically, it is a gas generator with isolation function used in coal chemical industry, comprising a furnace body 1 and a water-cooled wall 15 mounted thereon. A cyclone separator 11 is connected to the top outlet of the furnace body 1. The lower end of the cyclone separator 11 is connected to a return valve at the bottom of the furnace body 1 via a return pipe 12 (the above structure is common knowledge to those skilled in the art). The outlet of the return pipe 12 passes through a fixed sleeve 13 and is located above a bed 14. A fixed sleeve 13 is coaxially fixedly fitted inside the furnace body 1, and a bed 14, such as a fluidized bed composed of coal ash or inert bed material, is provided at the bottom of the fixed sleeve 13. The outer wall of the fixed sleeve 13 and the inner wall of the furnace body 1 form an annular flow channel, which is used to divert the primary air portion of the airflow from the air chamber at the bottom of the furnace body 1 to the outer area of ​​the fixed sleeve 13.

[0021] In the lower region of the fixed sleeve 13, multiple movable flaps 3 are uniformly rotatable in the circumferential direction. Each movable flap 3 is mounted on the wall of the fixed sleeve 13 via a rotating shaft and can deflect outwards to extend into the annular drainage channel. The specific driving method of the movable flap 3 is detailed below. Specifically, when the movable flap 3 deflects outwards to a certain angle (e.g., 30°~60°), it guides part of the airflow in the annular drainage channel into tangential airflow, forming a tangential vortex with a high peripheral velocity and a low central velocity. Furthermore, the movable flap 3 has a heat-conducting station that abuts against the water-cooled wall 15: as the movable flap 3 continues to deflect outwards until its end abuts against the inner surface of the water-cooled wall 15, the movable flap 3 conducts the low-temperature heat of the water-cooled wall 15 to the central region of the fixed sleeve 13.

[0022] It also includes a partition layer 4, which is placed above the active page 3 and is used to separate the dense phase zone and the sparse phase zone inside the furnace body 1.

[0023] Specifically, low-temperature coking mainly occurs when the bed temperature is low, manifesting as loose, porous coke lumps and semi-coke agglomeration and accumulation. If not treated promptly, they will gradually grow larger and block the fluidization channels. The movable page 3 deflects to a tangential guide position, directing part of the airflow in the annular guide channel into a tangential swirling flow with a high velocity at the periphery and a low velocity at the center, forming a low-pressure reflux zone in the center of the furnace body 1. The loose coke lumps produced by low-temperature coking are centrifugally thrown towards the central area and aggregated under the action of the swirling flow, entering the baffle layer 4 with the rising airflow, preventing the coke lumps from dispersing and adhering to the walls or accumulating at the corners.

[0024] High-temperature coking mainly refers to the formation of molten or semi-molten ash from fuels with low ash melting points at high temperatures, which solidifies on the wall surface to form hard slag blocks. At this time, the movable blade 3 deflects to the heat conduction position, with its end abutting against the water-cooled wall 15, directly conducting the low temperature of the water-cooled wall 15 to the central area of ​​the furnace, forming multiple local cold traps at the inlet of the partition layer 4. After the high-temperature molten ash or alkali metal vapor enters this area, it cools rapidly and undergoes heterogeneous condensation, preferentially solidifying on the cold wall, avoiding disorderly splashing and adhesion everywhere, thus protecting the water-cooled wall 15.

[0025] In the aforementioned technology, through the synergistic effect of the movable flap 3 and the partition layer 4, during low-temperature startup and low-load operation, the movable flap 3 deflects and guides the airflow into a tangential vortex with a high velocity at the periphery and a low velocity at the center, causing the low-temperature loose coke lumps to gather towards the center and enter the partition layer 4 with the rising airflow. During high-temperature stable operation, the movable flap 3 deflects to the heat-conducting position that abuts against the water-cooled wall 15, transferring the low temperature of the water-cooled wall 15 to the central region of the furnace, forming a local cold trap at the inlet of the partition layer 4, which rapidly cools the high-temperature molten ash or alkali metal vapor and allows it to condense controllably on the cold wall.

[0026] like Figures 4-9As shown, in a further embodiment of the present invention, a partition layer 4 is disposed above the active page 3 and used to separate the dense phase region and the sparse phase region within the furnace body 1. The partition layer 4 is formed by multiple conical cylinders stacked together. The partition layer 4 is configured to switch between a forward pagoda shape and a reverse pagoda shape. In the forward pagoda shape, the partition layer 4 bulges upward as a whole, and the cross-sectional area of ​​the annular channel gradually decreases from bottom to top. In the reverse pagoda shape, the partition layer 4 is recessed downward as a whole, and the cross-sectional area of ​​the annular channel gradually increases from bottom to top, resulting in airflow deceleration.

[0027] The partition layer 4 includes a snap-fit ​​member 42 fixedly disposed at the bottom end of the conical cylinder and used to abut against the inner wall of the top of the adjacent conical cylinder. The snap-fit ​​member 42 is a radially protruding block or pin structure. At low temperatures, the snap-fit ​​member 42 abuts against the inner wall of the top of the adjacent inner conical cylinder, causing each conical cylinder to open upwards and form an upwardly protruding positive pagoda shape. It also includes a fixed scraper 41 fixedly disposed at the bottom end of the conical cylinder and used to engage with the top of the adjacent conical cylinder. The fixed scraper 41 has a concave portion 411 in the middle. At high temperatures, the snap-fit ​​member 42 disengages from the abutment, and the fixed scraper 41 engages with the top of the adjacent inner conical cylinder, causing each conical cylinder to concave downwards and form a reverse pagoda shape.

[0028] The partition layer 4 includes an inner cone 4a as the innermost ring and an outer cone 4b as the outermost ring. The outer cone 4b is connected to the inner wall of the furnace body 1 through a mounting base 6 for limiting connection, as detailed below. A drive rod 2 is slidably mounted on the top of the furnace body 1 along the axial direction. The bottom end of the drive rod 2 is fixedly connected to the inner cone 4a, and the top end of the drive rod 2 is connected to an external drive device. The external drive device can be a hydraulic cylinder. The aforementioned drive device is a technical means known to those skilled in the art and will not be described in detail here.

[0029] Specifically, when low-temperature start-up or low-load operation is required, the external drive device drives the drive rod 2 to move upward, causing the inner cone 4a to rise. The retaining piece 42 at the bottom of the inner cone 4a rises accordingly and abuts against the top inner wall of the adjacent outer cone, pushing the outer cone upward; and so on, each layer of cones is opened in sequence, causing the entire partition layer 4 to bulge upward, forming a positive pagoda shape with the cross-sectional area of ​​the annular channel gradually decreasing from bottom to top. At this time, the coke blocks accelerate with the airflow in the channel, the velocity slip between particles increases, the collision frequency and kinetic energy are greatly increased, and the coke blocks are forcibly broken into fine powder. The fine powder re-participates in combustion, preventing the coke blocks from growing and clogging the bed 14 from the source. At the same time, the entire partition layer 4 arches towards the top of the furnace, the space below it is significantly expanded, while the space above it is compressed. The dense phase zone above the bed 14 naturally expands upward under the action of the rising airflow, the height of the dense phase zone is significantly increased, the solid concentration distribution is more uniform, the gas-solid contact time is prolonged, which is conducive to heat accumulation and initial ignition. As the volume of the loose phase zone decreases, the gas velocity reaches its maximum here due to the reduced cross-sectional area of ​​the channel. This facilitates the rapid entrainment of the crushed fine powder out of the furnace and into the cyclone separator 11, enabling rapid material return.

[0030] When high-temperature stable operation is required, the external drive device drives the drive rod 2 downward, causing the inner cone 4a to descend. The fixed scraper 41 at the bottom of the inner cone 4a descends accordingly and hooks onto the top of the adjacent outer cone, engaging through the concave part 411, pulling the outer cone downward; and so on, each layer of cones is pulled down in sequence, causing the entire partition layer 4 to be concave downward, forming a reverse pagoda shape with the cross-sectional area of ​​the annular channel gradually increasing from bottom to top. The cross-sectional area of ​​the annular channel increases from bottom to top, the airflow velocity decreases significantly, the residence time of the molten slag in the channel is extended, and it fully contacts the cold wall surface formed by the aforementioned movable page 3 at this stage, ensuring complete solidification. Because the concave structure of the reverse pagoda occupies the lower space, the dense phase region above the bed 14 is confined to a smaller area inside the fixed sleeve 13 and below the partition layer 4. The reverse pagoda shape is mainly used for high-temperature stable operation. At this time, the furnace temperature has reached above the ash melting point, and the main risk is that the molten ash solidifies on the wall surface to form large pieces of high-temperature coke. The gradually expanding annular channel slows down the airflow velocity. The dense phase region sinks and is compressed, while the sparse phase region expands and the airflow slows down. On the one hand, this allows alkali metal vapor and molten droplets sufficient time to condense controllably at low temperatures on the water-cooled wall 15, which is conducted by the moving page 3 on the cold wall surface. On the other hand, it prevents the high-speed airflow from blowing away the unsolidified slag and adhering it to the upper part of the furnace.

[0031] In the above technology, when the dense phase region moves upward in a positive pagoda, the high-temperature region moves upward as well, which helps to quickly increase the temperature of the entire furnace. When the dense phase region sinks in a reverse pagoda, the high-temperature region is concentrated near the bed 14, which reduces the temperature of the upper part of the furnace, reduces NOx generation, and protects the water-cooled wall 15.

[0032] like Figures 4-9 As shown, in a further embodiment of the present invention, the fixed scraper 41 is inclined so that the conical cylinder is driven to rotate by the airflow; the fixed scraper 41 has a head end 412 and a tail end 413, wherein the rotation trajectories of the fixed scrapers 41 on adjacent conical cylinders do not interfere with each other, the fixed scraper 41 of the inner conical cylinder is located at its bottom end, and the fixed scraper 41 of the outer conical cylinder is also located at its bottom end, but since the conical cylinder itself has an axial height difference, the inner cylinder is higher than the outer cylinder or vice versa, so that the rotation planes of the inner and outer scrapers are not on the same horizontal plane, thus avoiding interference.

[0033] Specifically, the inner wall of the furnace body 1 is slidably provided with a slag-hanging plate 5 for receiving the slag material being thrown off, and the side of the furnace body 1 is provided with multiple overflow ports 16 corresponding to the positions of the low-level slag-hanging plates 5.

[0034] The fixed scraper 41 is arranged obliquely in the circumferential direction, meaning its plane forms a certain angle with the radial or axial direction of the conical cylinder, for example, 30°~60°. The rising airflow flows vertically upward. When it encounters the oblique fixed scraper 41, the rising airflow generates circumferential aerodynamic force on the fixed scraper 41, pushing the conical cylinder to rotate slowly around its axis. Centrifugal force throws the slag film condensed on the inner wall 45 of the coating and the slag chunks scraped off by the fixed scraper 41 towards the bottom edge of the conical cylinder. After the slag chunks accumulate to a certain amount at the slag hanging plate 5, they are discharged through the slag overflow port 16, or the slag overflow port 16 is opened periodically and sucked out by a negative pressure device.

[0035] like Figures 4-9 As a further embodiment of the present invention, the conical cylinder of the partition layer 4 has a coated inner wall 45, wherein a plurality of grooves 43 are provided on the inner wall 45 to restrict the circumferential movement of the snap-fit ​​member 42. The grooves 43 gradually widen in width and narrow in depth from the top to the bottom, so that the molten material in the grooves 43 is forced to extend as it flows downward. In the forward pagoda configuration, the upper baffle 61 of the mounting base 6 ensures that the outer conical cylinder 4b is lifted, so that the snap-fit ​​member 42 falls into the top of the groove 43 along the wider bottom end of the groove 43 during its upward movement, achieving reliable circumferential locking. The thrust of the rising airflow on the fixed scraper 41 cannot be converted into rotation, but into axial vibration of the conical cylinder, preventing coke from adhering to the inner wall of the conical cylinder or the surface of the channel, thus achieving active anti-sticking. In the reverse pagoda shape, the molten slag that has not completely detached is forced to spread into a thinner liquid film as it flows downward, increasing the heat dissipation area and accelerating solidification; at the same time, it breaks the tendency of the molten slag to prematurely agglomerate under the action of surface tension, until it reaches the bottom and agglomerates into uniform droplets, which are then thrown off onto the slag hanging plate 5 by centrifugal force through the rotation of the cone-shaped cylinder.

[0036] like Figures 1-11As shown, in a further embodiment of the present invention, a mounting base 6 is fixedly disposed on the inner wall of the furnace body 1 to limit the movement distance of the outer cone 4b. Specifically, an upper baffle 61 and a lower baffle 62 are fixedly disposed on the mounting base 6. When the partition layer 4 switches to the positive pagoda shape, the drive rod 2 pulls the inner cone 4a upward, and the outer cone 4b moves upward accordingly through the supporting action of the snap-fit ​​member 42. When the outer cone 4b moves upward to its top edge or the fixing member 44 touches the lower surface of the upper baffle 61, it is blocked by the upper baffle 61 and cannot move upward further, thereby limiting the maximum protrusion height in the positive pagoda shape. When the partition layer 4 switches to the reverse pagoda shape, the drive rod 2 pushes the inner cone 4a downward, and the outer cone 4b moves downward accordingly through the snap-fit ​​action of the fixed scraper 41. When the outer cone 4b moves down to its top edge or the fixing member 44 touches the upper surface of the lower baffle 62, it is blocked by the lower baffle 62 and cannot move down further, thus limiting the maximum depth of the indentation in the reverse pagoda shape.

[0037] like Figures 10-11 As shown, as a further embodiment of the present invention, it also includes a transmission mechanism for keeping the movable page 3 and the partition layer 4 moving synchronously. The transmission mechanism includes a fixing member 44 fixedly connected to the outer cone cylinder 4b, and a fixing rod 63 located inside the side wall of the furnace body 1 is fixedly installed on the fixing member 44. The fixing rod 63 is fixedly connected to the slag hanging plate 5, and a transmission rod 51 is fixedly installed at the bottom end of the slag hanging plate 5. A protrusion 31 is fixedly installed on the top of the movable page 3, and an arc groove 32 is opened on the protrusion 31 to slide with the transmission rod 51.

[0038] Specifically, the shape switching of the partition layer 4 is directly controlled by an external drive device, such as a hydraulic cylinder, through the drive rod 2 to raise and lower the inner cone 4a, thereby driving the outer cone 4b to move axially. The fixing member 44 is rigidly connected to the outer cone 4b, so the axial movement of the outer cone 4b is directly transmitted to the transmission rod 51 through the fixing member 44. Since the transmission rod 51 is fixedly connected to the slag hanging plate 5, the slag hanging plate 5 also slides axially synchronously with the transmission rod 51. When the transmission rod 51 moves upward, the inclined inner wall of the arc groove 32 produces relative sliding on the transmission rod 51. However, since the transmission rod 51 is restricted by the guide groove to only make axial linear movements, the reaction force will push the protrusion 31 through the arc groove 32, causing the movable page 3 to deflect around its axis to the tangential position. When the transmission rod 51 moves downward, the arc groove 32 pushes the protrusion 31 to deflect in the opposite direction, causing the movable page 3 to deflect outward from the tangential flow position to approach the heat position.

[0039] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gas generator with isolation function for coal chemical industry, comprising a furnace body (1) and a water-cooled wall (15) disposed thereon, characterized in that, A fixed sleeve (13) is fixedly sleeved inside the furnace body (1), wherein a bed layer (14) is provided at the bottom of the fixed sleeve (13), and the outer wall of the fixed sleeve (13) and the inner wall of the furnace body (1) enclose and form an annular drainage channel for diverting part of the airflow at the bottom of the furnace body (1). It also includes a movable page (3) that is rotatably mounted on a fixed sleeve (13) and can extend into an annular drainage channel to form a tangential airflow. The movable page (3) has a heat-conducting station that abuts against the water-cooled wall (15). The partition layer (4) is located above the active page (3) and is used to separate the dense phase zone and the sparse phase zone inside the furnace body (1). The partition layer (4) is formed by multiple conical cylinders stacked together. The partition layer (4) is configured to switch between a forward pagoda shape and a reverse pagoda shape.

2. A gas generator with isolation function for coal chemical industry according to claim 1, characterized in that, The partition layer (4) includes a snap-fit ​​member (42) fixedly disposed at the bottom end of the conical cylinder and used to abut against the inner wall of the top of the adjacent conical cylinder, and the partition layer (4) protrudes upward when the snap-fit ​​member (42) is in the abutting state; It also includes a fixed scraper (41) fixedly disposed at the bottom of the conical cylinder and used to engage with the top of the adjacent conical cylinder, and the partition layer (4) is recessed downward when the fixed scraper (41) is engaged.

3. The coal gasifier with isolation function for coal chemical industry according to claim 1, characterized in that, The partition layer (4) includes an innermost inner cone (4a) and an outermost outer cone (4b), wherein the outer cone (4b) is connected to the inner wall of the furnace body (1).

4. The coal gasifier with isolation function for coal chemical industry according to claim 2, characterized in that, The fixed scraper (41) is inclined so that the conical cylinder is driven to rotate by the airflow; The fixed scraper (41) has a head end (412) and a tail end (413) with opposite ends, wherein the rotation trajectories of the fixed scrapers (41) on adjacent conical cylinders do not interfere with each other.

5. A gas generator with isolation function for coal chemical industry according to claim 2, characterized in that, The conical tube of the partition layer (4) has a coated inner wall (45), wherein a plurality of grooves (43) are provided on the side of the coated inner wall (45) to restrict the circumferential movement of the snap fastener (42).

6. The coal gasifier with isolation function for coal chemical industry according to claim 5, characterized in that, The groove (43) gradually widens in width and narrows in depth from top to bottom, so that the molten material in the groove (43) is forced to extend as it flows downward.

7. The coal gasifier with isolation function for coal chemical industry according to claim 1, characterized in that, The furnace body (1) has a slag-hanging plate (5) that is slidably provided along the axial direction on the inner wall for receiving the slag material being thrown off.

8. The coal gasifier with isolation function for coal chemical industry according to claim 1, characterized in that, It also includes a mounting base (6) fixedly installed on the inner wall of the furnace body (1) and used to limit the movement distance of the outer cone (4b), wherein an upper baffle (61) and a lower baffle (62) are fixedly installed on the mounting base (6).

9. The coal gasifier with isolation function for coal chemical industry according to claim 1, characterized in that, It also includes a transmission mechanism for keeping the active page (3) and the partition layer (4) moving synchronously. The transmission mechanism includes a fixing member (44) fixedly connected to the outer cone (4b), and a transmission rod (51) located inside the side wall of the furnace body (1) is fixedly provided on the fixing member (44). The transmission rod (51) is fixedly connected to the slag hanging plate (5), and the transmission rod (51) is fixedly installed at the bottom of the slag hanging plate (5). The top of the active page (3) is fixedly provided with a protrusion (31), and the protrusion (31) is provided with an arc groove (32) that slides with the transmission rod (51).

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