Adjustable UGI gasifier baffle structure
Patent Information
- Application Number
- CN202522690904.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-19
AI Technical Summary
The baffle plate of the existing UGI gasifier is a single welded and fixed structure that cannot be flexibly adjusted, which makes it impossible to match the size of the ash discharge port with the actual working conditions, thus affecting the gasification efficiency and gas production.
Using gears and racks as the core transmission pair, combined with a disc scale and pointer mechanism, the baffle plate can be precisely adjusted online. The adjustment screw is driven by a hand crank, and the gear meshing drives the rack to move linearly. With a protective sleeve to isolate the high temperature environment, the opening of the ash outlet can be precisely controlled.
This has improved the stability of the gasification layer and increased gas production, reduced residual carbon content, enhanced production flexibility and energy efficiency, and reduced maintenance costs.
Smart Images
Figure CN224930506U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal chemical technology, and more specifically, to an adjustable UGI gasifier baffle structure. Background Technology
[0002] Fixed-bed coal gasification technology, a traditional process in coal chemical industries such as synthetic ammonia and urea production, still holds an important position in my country. This process typically employs a UGI gasifier and uses high-quality anthracite lump coal as raw material. Anthracite, due to its high fixed carbon content, good mechanical strength and thermal stability, and low volatile matter content, can form a well-permeable fuel bed in fixed-bed gasification, which is beneficial for obtaining higher effective gas composition and gas production, demonstrating significant theoretical advantages.
[0003] However, in actual operation, the energy efficiency of this process is highly dependent on the ash discharge control at the bottom of the gasifier. The ash from the bottom gasification reaction needs to be discharged through the ash discharge port, and the ash discharge rate directly determines the residence time of fuel in the gasification layer, thus affecting the carbon conversion rate and gasification efficiency. A common core problem currently faced by the industry is that most UGI gasifiers have a single, welded, fixed bottom baffle plate. This rigid design prevents the ash discharge port size from being changed, resulting in a mismatch between the ash discharge intensity and actual operating conditions such as the characteristics of the coal fed into the furnace and load variations.
[0004] Specifically, fixed baffle plates present significant drawbacks. When the ash discharge port is designed to be too large, ash and slag are discharged too quickly, and unreacted fuel from the upper layer is prematurely carried into the ash bin, resulting in persistently high residual carbon levels in the ash and slag, increased raw coal consumption, and an unstable gasification layer, hindering the effective utilization of the single-furnace gas production capacity. Conversely, if the size is too small, ash discharge becomes obstructed. Currently, if companies need to optimize this parameter, they can only do so by cutting and welding the baffle plate after the furnace is shut down. This method not only has a long operation cycle and affects production continuity, but it is also a one-time adjustment, unable to achieve flexible and precise online regulation. This severely restricts the gasifier's adaptability to changes in coal type and production load fluctuations, becoming a key bottleneck limiting the improvement of the unit's energy efficiency. Utility Model Content
[0005] To overcome the shortcomings of the existing technology, this utility model provides an adjustable baffle structure for a UGI gasifier. This device is a reliable and easy-to-operate online adjustable baffle device. It enables precise and linear adjustment of the ash outlet opening, allowing operators to respond quickly to real-time operating conditions, thereby stabilizing the gasification layer in an optimal state and achieving the fundamental goals of extending fuel residence time, reducing residual carbon, and increasing gas production and overall energy efficiency.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An adjustable UGI gasifier baffle structure is characterized by comprising a hand crank, an adjusting screw, a fixed flange, a gear, a rack, a baffle, and a mounting base. The mounting base is a wall panel of the gasifier ash hopper. The fixed flange is fixedly installed on the surface of the mounting base. The adjusting screw passes through the fixed flange and the mounting base. The hand crank is located at the front end of the adjusting screw. The gear is fixedly connected to the rear end of the adjusting screw. The rack meshes with the gear and is located on the side of the gear. The baffle is installed on the back of the rack and is located at the ash outlet of the gasifier. The baffle moves vertically as the rack rotates.
[0007] The gear and rack have matching modules, and the length of the rack is greater than the maximum design adjustment stroke of the baffle.
[0008] It also includes a circular scale, a pointer, and a metal lever. The circular scale is disposed between the mounting base plate and the fixed flange. The adjusting screw passes through the center of the circular scale. The pointer is disposed on the circular scale. The metal lever is disposed inside the circular scale and is fixedly connected to the adjusting screw.
[0009] It also includes a protective sleeve, which is fixedly installed on the side of the mounting base facing the furnace and fitted over the gear and rack.
[0010] The baffle plate is fixed to the back of the rack by a detachable pressure plate structure or by bolt connection.
[0011] The rotation of the adjusting screw is matched with the transmission of the pointer, so that every predetermined number of rotations of the hand crank causes the metal paddle to rotate once, causing the pointer to indicate a change of one centimeter on the disc scale.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Employing a gear and rack as the core transmission pair significantly improves the linearity, load-bearing capacity, and reliability of the adjustment. The rotating screw drives the gear, and the meshing gears in turn drive the rack in a strictly linear motion. This structure maintains a constant transmission ratio, precise motion, and eliminates sliding friction losses. Compared to traditional screw-nut pairs or wire rope transmission methods, the gear and rack mechanism effectively withstands the intermittent lateral forces and vibrations generated by materials inside the furnace on the baffle plate, preventing slippage or backlash, and ensuring accurate transmission of adjustment commands and self-locking position retention under harsh operating conditions.
[0013] The integrated disc scale and linkage pointer mechanism at the front end of the screw make the adjustment process intuitive and precise. This ingenious structure directly converts the number of rotations of the adjusting screw into the height change value of the baffle plate via the scale on the disc. When the operator turns the hand crank, they can simultaneously observe the movement of the pointer on the precision scale, thereby achieving control and quantitative management of the ash outlet opening. This elevates process operation from experience-based judgment to data-driven control, greatly facilitating the optimization and reproduction of optimal parameters.
[0014] The protective sleeve structure installed inside the furnace provides crucial environmental protection for the core transmission components. This sleeve completely encloses the gears, racks, and their meshing areas, forming a physical barrier that effectively prevents the intrusion of high-temperature ash and dust. This design fundamentally solves the industry problem of easy wear and jamming of transmission components in dusty, high-temperature environments, ensuring the long-term smooth operation and transmission accuracy of the gear and rack pair, and significantly extending maintenance cycles and overall service life.
[0015] The detachable connection between the baffle and the rack back provides the device with excellent modularity and adaptability. This structure allows for quick replacement of baffles of different specifications or repair of individual damaged components without altering the core transmission mechanism. This design not only meets the process requirements of flexibly matching baffle sizes to different coal types but also reduces the complexity and cost of daily maintenance, demonstrating the practicality and economy of the design. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the installation position of the structure of this utility model; Figure 2 This is a schematic diagram of the overall assembly of the present utility model; Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a top view of the structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of the circular scale of this utility model; Figure 6 This is a schematic diagram of the protective sleeve structure of this utility model; Figure 7 This is another schematic diagram of the protective sleeve structure of this utility model; In the diagram: 1 is the hand crank, 2 is the adjusting screw, 3 is the fixed flange, 4 is the circular scale, 5 is the pointer, 6 is the metal lever, 7 is the gear, 8 is the rack, 9 is the skid plate, 10 is the mounting base plate, and 11 is the protective cover. Detailed Implementation
[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.
[0019] like Figures 1 to 7 As shown, an adjustable UGI gasifier baffle structure is characterized by comprising a hand crank 1, an adjusting screw 2, a fixing flange 3, a gear 7, a rack 8, a baffle 9, and a mounting base 10. The mounting base 10 is the wall panel of the gasifier ash hopper. The fixing flange 3 is fixedly mounted on the surface of the mounting base 10. The adjusting screw 2 passes through the fixing flange 3 and the mounting base 10. The hand crank 1 is located at the front end of the adjusting screw 2. The rear end of the adjusting screw 2 is fixedly connected to the gear 7. The rack 8 meshes with the gear 7 and is located on the side of the gear 7. The baffle plate 9 is installed on the back of the rack 8 and is located at the ash outlet of the gasifier. The baffle plate 9 moves vertically as the rack 8 rotates. The hand crank 1 is the input end, and its rotation drives the adjusting screw 2 to rotate. The rotational motion of the adjusting screw 2 is transmitted to the rack 8, which meshes with it, through the gear 7 fixed at its end. This converts the rotational motion into the precise linear motion of the rack 8. The baffle plate 9 installed on the back of the rack 8 moves up and down synchronously with the rack 8, thereby directly changing the vertical distance between its lower edge and the ash pan, and realizing the control of the size of the ash outlet.
[0020] Preferably, the modules of gear 7 and rack 8 are matched, and the length of rack 8 is greater than the maximum design adjustment stroke of baffle 9. The module is the basic parameter that determines the shape and size of the gear tooth profile. The modules of gear 7 and rack 8 must be the same. This is a prerequisite for the two to mesh and transmit power correctly and smoothly, which can ensure that the transmission is smooth and the force is transmitted evenly.
[0021] Preferably, the system also includes a circular scale 4, a pointer 5, and a metal lever 6. The circular scale 4 is positioned between the mounting base plate 10 and the fixed flange 3. The adjusting screw passes through the center of the circular scale. The pointer 5 is positioned on the circular scale 4. The metal lever 6 is positioned inside the circular scale 4 and is fixedly connected to the adjusting screw 2. The circular scale 4 remains stationary, and its surface is engraved with graduations representing height changes. The metal lever 6 is fixed to the adjusting screw 2 and rotates synchronously with it. When the adjusting screw 2 rotates, the metal lever 6 moves the pointer 5, causing the pointer 5 to move on the scale of the circular scale 4. By observing the graduations indicated by the pointer 5, the precise height position of the baffle 9 can be read directly and in real time without stopping the machine or entering the furnace for measurement, thus realizing the visualization and digitization of the adjustment process.
[0022] Preferably, it also includes a protective sleeve 11, which is fixedly installed on the side of the mounting base plate 10 facing the furnace and is fitted over the gear 7 and rack 8. The protective sleeve 11 is a key environmental protection component. It acts like a sealed or semi-sealed cover, completely enclosing the precision gear 7 and rack 8 transmission pair, isolating them from the harsh environment of high temperature, high ash, and high corrosiveness inside the furnace.
[0023] Preferably, the baffle 9 is fixed to the back of the rack 8 by a detachable pressure plate structure or bolt connection. The connection between the baffle 9 and the rack 8 by bolts or pressure plates means that the two are separable. This detachable design brings significant maintenance and operational flexibility.
[0024] Preferably, the rotation of the adjusting screw 2 is matched with the transmission of the pointer 5, so that for every predetermined number of rotations of the hand crank 1, the metal paddle 6 rotates one revolution, causing the pointer 5 to indicate a change of one centimeter on the disc scale 4. For every fixed and easy-to-remember number of rotations of the hand crank 1, the skid plate 9 will rise or fall precisely by one standard unit height, and the pointer 5 will clearly indicate this unit change on the disc scale 4.
[0025] The wall panel of the gasifier ash hopper serves as the mounting base plate 10, with through holes machined into it for the adjusting screw 2 to pass through. A hand crank 1 is fixedly mounted on the front end of the adjusting screw 2, which is exposed outside the furnace. A gear 7 is fixedly mounted on the rear end of the adjusting screw 2, located inside the furnace. A rack 8 is then meshed with the gear 7. The rack 8 is kept vertical along its length, with its back facing the center of the ash hopper inside the furnace. A suitable baffle plate 9 is selected. The baffle plate 9 is fixed to the back of the rack 8 using a detachable connection method such as a pressure plate or bolts. A protective sleeve 11 is installed on the side of the mounting base plate 10 facing inside the furnace. The protective sleeve 11 completely covers the meshing area of the gear 7 and the rack 8, as well as the travel section of the rack 8. Its lower end is closed, and a maintenance cover can be provided on the side to isolate the ash and slag inside the furnace.
[0026] On the outside of the furnace, a circular scale 4 is fixed to the fixed flange 3, with the adjusting screw 2 passing through its center. A pointer 5 is installed on the circular scale 4, and a metal lever 6 is fixed to the adjusting screw 2, positioned inside the circular scale 4. This ensures that when the adjusting screw 2 rotates, the metal lever 6 rotates accordingly and is linked with the pointer 5. By calculating the transmission ratio between the gear 7 and the rack 8, and combining this with the rotation of the adjusting screw 2, the mathematical relationship between the number of rotations of the hand crank 1 and the actual lifting height of the baffle 9 is determined. Based on this relationship, the scale 4 is calibrated so that the indication value of the pointer 5 directly corresponds to the actual height of the lower edge of the baffle 9. When the size of the ash outlet needs to be adjusted during gasification furnace operation, the rotation of the hand crank 1 drives the adjusting screw 2 to rotate synchronously. The rotation of the gear 7, through meshing with the rack 8, is converted into the precise vertical lifting motion of the rack 8. The lifting and lowering movement of rack 8 causes the baffle 9 fixed to its back to move vertically in sync, thereby changing the gap between the lower edge of baffle 9 and the fixed ash pan, thus adjusting the height of the ash outlet. Simultaneously, as the adjusting screw 2 rotates, the metal lever 6 fixed to it rotates accordingly, moving or driving the pointer 5 along the circular scale 4. Workers can directly and accurately read the real-time height of the ash outlet by observing the position of the pointer 5 on the calibrated scale.
[0027] The above description only details the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.
Claims
1. An adjustable UGI gasifier baffle structure, characterized in that: The device includes a hand crank (1), an adjusting screw (2), a fixed flange (3), a gear (7), a rack (8), a baffle plate (9), and a mounting base plate (10). The mounting base plate (10) is the wall panel of the gasifier ash hopper. The fixed flange (3) is fixedly installed on the surface of the mounting base plate (10). The adjusting screw (2) passes through the fixed flange (3) and the mounting base plate (10). The hand crank (1) is located at the front end of the adjusting screw (2). The gear (7) is fixedly connected to the rear end of the adjusting screw (2). The rack (8) meshes with the gear (7). The rack (8) is located on the side of the gear (7). The baffle plate (9) is installed on the back of the rack (8). The baffle plate (9) is located at the ash outlet of the gasifier. The baffle plate (9) moves vertically as the rack (8) rotates.
2. The adjustable UGI gasifier baffle structure according to claim 1, characterized in that: The gear (7) is matched with the module of the rack (8), and the length of the rack (8) is greater than the maximum design adjustment stroke of the baffle (9).
3. The adjustable UGI gasifier baffle structure according to claim 1, characterized in that: It also includes a circular scale (4), a pointer (5) and a metal lever (6). The circular scale (4) is disposed between the mounting base plate (10) and the fixed flange (3). The adjusting screw (2) passes through the center of the circular scale (4). The pointer (5) is disposed on the circular scale (4). The metal lever (6) is disposed inside the circular scale (4) and is fixedly connected to the adjusting screw (2).
4. The adjustable UGI gasifier baffle structure according to claim 1, characterized in that: It also includes a protective sleeve (11), which is fixedly installed on the side of the mounting base plate (10) facing the furnace and is fitted over the gear (7) and rack (8).
5. The adjustable UGI gasifier baffle structure according to claim 1, characterized in that: The baffle plate (9) is fixed to the back of the rack (8) by a detachable pressure plate structure or bolt connection.
6. The adjustable UGI gasifier baffle structure according to claim 3, characterized in that: The rotation of the adjusting screw (2) is matched with the transmission of the pointer (5), so that every time the hand crank (1) rotates a predetermined number of times, the metal paddle (6) rotates one revolution, causing the pointer (5) to indicate a change of one centimeter on the disc scale (4).