Furnace bottom assembly of fixed bed gas producer with internal filling device

Abstract

The utility model discloses a fixed bed gas producer furnace bottom assembly with an inner filling device, which comprises a furnace bottom shell and an ash tray positioned in the furnace bottom shell, a fixed ring is arranged below the ash tray, the fixed ring is connected with a big gear ring for driving the fixed ring to rotate, and the big gear ring is connected with a small gear ring. The side wall of the furnace bottom shell is provided with an open hole allowing the driving gear to enter and meshed with the large gear ring, and a filling part for reducing entering of high-temperature steam is arranged between the furnace bottom shell and the ash tray. The utility model has the beneficial effects that the filling part is arranged in the unoccupied space in the furnace bottom assembly, so that the unoccupied space is reduced, the waste of steam is further reduced, and the amount of waste water needing to be treated in the gas making process is further reduced; moreover, when sudden power failure occurs, serious accidents can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of coal gas production and manufacturing, and in particular to a fixed-bed coal gas generator hearth assembly with an internal filling device. Background Technology

[0002] A coal gasifier is a production device that converts coal into combustible gas (i.e., coal gas, whose main components are CO, H2, CH4, etc.). The working principle is as follows: after screening coal that meets the gasification process indicators, it is added into the coal gasifier by a coal feeder, and then steam or air is blown in from the bottom of the furnace, so that the coal burns in the furnace and generates combustible gas.

[0003] In existing technologies, the furnace bottom assembly of a coal gasifier typically includes a furnace bottom shell and an ash pan that supports coal and needs to rotate continuously, resulting in a large amount of unused space within the assembly. Each gasification cycle in a coal gasifier comprises five stages: blowing air, upward blowing, downward blowing, secondary upward blowing, and purging. Each gasification cycle lasts approximately 2.5-3 minutes, with about 200,000 cycles per year. If the unused space at the furnace bottom is too large, when the upward blowing cycle transitions to downward blowing, the high-temperature steam accumulated at the furnace bottom doesn't even enter the furnace for high-temperature gasification before being forced out by the downward-blown coal gas. This not only results in a significant waste of steam but also, after being cooled in the gas scrubbing tower, becomes difficult-to-treat wastewater. If the furnace bottom is not properly sealed, the high-temperature steam accumulated in the furnace bottom space during a sudden power outage may cause a furnace bottom explosion (in actual production, explosion-proof baffles are installed on the outside of the gasifier to prevent casualties; however, if too much high-temperature steam accumulates, a sudden power outage will cause a large amount of high-temperature steam to break through the explosion-proof baffles, producing a particularly loud noise and causing panic).

[0004] like Figure 1 The image shows the furnace bottom assembly of the gasifier currently used by the manufacturer, with approximately 0.5m of unused space. 3 The gas production process leads to a significant waste of resources. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art, reduce the empty space inside the furnace bottom assembly, reduce resource waste, and improve its safety performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fixed-bed gasifier furnace bottom assembly with an internal filling device includes a furnace bottom shell and an ash pan located inside the furnace bottom shell. A fixing ring is provided below the ash pan, and the fixing ring is connected to a large gear ring that drives its rotation. An opening is provided on the side wall of the furnace bottom shell for the drive gear to enter and mesh with the large gear ring. A filling part is provided between the furnace bottom shell and the ash pan to reduce the amount of high-temperature steam entering.

[0008] Preferably, the furnace bottom shell has a recessed portion for accommodating a large toothed ring and a fixing ring, the recessed portion having a first ring edge and a second ring edge, and the filling portion including a first annular filling portion that contacts the first ring edge and a second annular filling portion that contacts the second ring edge.

[0009] Preferably, the filling portion further includes a third annular filling portion and a fourth annular filling portion located on the inner and outer sides of the fixing ring.

[0010] Preferably, the first annular filling part, the second annular filling part, the third annular filling part and the fourth annular filling part are all refractory cement, and the edges of the first annular filling part, the second annular filling part, the third annular filling part and the fourth annular filling part are respectively provided with a first annular baffle, a second annular baffle, a third annular baffle and a fourth annular baffle to facilitate filling refractory cement.

[0011] Preferably, a reinforcing plate is also provided at the bottom of the ash pan.

[0012] Preferably, it also includes ball bearings that support the rotation of the ash pan. An annular upper slide rail is provided near the center of the ash pan, and an annular lower slide rail that cooperates with the annular upper slide rail is provided near the center of the furnace bottom shell. A spherical space for placing the ball bearings is formed between the annular upper slide rail and the annular lower slide rail.

[0013] Preferably, a sealing ring is provided on the furnace bottom outer shell.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By setting a filling section in the empty space within the furnace bottom assembly, the empty space is reduced, thereby reducing steam waste and the amount of wastewater that needs to be treated during the gasification process; moreover, it can also prevent serious accidents in the event of a sudden power outage.

[0016] 2. The filling part is made of refractory cement, which is low in cost and easy to install; before filling with refractory cement, baffles can be used to limit its movement, which further improves the filling efficiency. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the furnace bottom assembly in the prior art;

[0018] Figure 2 This is a cross-sectional view of the furnace bottom assembly in this application.

[0019] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings. Example

[0021] like Figure 2 As shown in the figure, a fixed-bed gasifier hearth assembly with an internal filling device in this embodiment includes a hearth shell 5 and an ash pan 1 located inside the hearth shell 5. A fixing ring 3 is provided below the ash pan 1, and a large gear ring 6 that drives the fixing ring 3 to rotate is connected to the fixing ring 3. The large gear ring 6 and the fixing ring 3 can be connected by bolts or welded together. The side wall of the hearth shell 5 has an opening (not shown in the figure) for the drive gear (not shown in the figure) to enter and mesh with the large gear ring 6. This structure is the basic structure of the existing hearth assembly, and will not be described in detail in this embodiment.

[0022] A filling section is provided between the furnace bottom shell 5 and the ash pan 1 to reduce the amount of high-temperature steam entering. The filling section reduces the empty area inside the furnace bottom assembly, thereby reducing steam waste and steam leakage in the event of an accident.

[0023] The furnace bottom outer shell 5 has a recessed portion 51 that accommodates the large toothed ring 6 and the fixing ring 3. The recessed portion 51 has a first ring edge 52 and a second ring edge 53. The filling portion includes a first annular filling portion 11 that contacts the first ring edge 52 and a second annular filling portion 12 that contacts the second ring edge 53. The first annular filling portion 11 and the second annular filling portion 12 do not contact the ash pan 1.

[0024] The filling section also includes a third annular filling section 13 and a fourth annular filling section 14 located on the inner and outer sides of the fixed ring 3. The third annular filling section 13 and the fourth annular filling section 14 do not contact the furnace bottom shell 5. By setting multiple filling sections, the empty area inside the furnace bottom assembly is effectively reduced, while not affecting the rotation of the ash pan 1 inside the furnace bottom shell 5.

[0025] The first annular filling part 11, the second annular filling part 12, the third annular filling part 13, and the fourth annular filling part 14 are all made of refractory cement. At the edges of the first annular filling part 11, the second annular filling part 12, the third annular filling part 13, and the fourth annular filling part 14, respectively, are provided first annular baffles 15, 16, 17, and 18 to facilitate the filling of refractory cement. During filling, firstly, the first annular baffles 15 and 16 are welded onto the furnace bottom shell 5, and then refractory cement is poured into them to form the first annular filling part 11 and the second annular filling part 12; then, refractory cement is poured into the inner and outer sides of the fixing ring 3 in the ash pan 1 to form the third annular filling part 13 and the fourth annular filling part 14, and then the third annular baffles 17 and 18 are welded; finally, the ash pan 1 is inserted into the furnace bottom shell 5.

[0026] The bottom of the gray disk 1 is also equipped with a reinforcing plate 7 to improve the strength of its edge parts.

[0027] The furnace bottom assembly also includes ball bearings 2 that support the rotation of the ash pan 1. An annular upper slide rail 21 is provided on the ash pan 1 near the center, and an annular lower slide rail 22 that cooperates with the annular upper slide rail 21 is provided on the furnace bottom shell 5 near the center. A spherical space for placing the ball bearings is formed between the annular upper slide rail 21 and the annular lower slide rail 22. The arrangement of the ball bearings 2 makes the rotation process of the ash pan 1 more stable.

[0028] A sealing ring 4 is also provided on the outer shell 5 of the furnace bottom.

[0029] This embodiment reduces the empty area within the furnace bottom assembly by using a filling section. According to the applicant's actual tests, the empty area can be reduced from 0.5m². 3 Reduced to approximately 0.1m 3 This greatly reduces the waste of high-temperature steam and also reduces steam leakage in the event of an accident.

[0030] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0032] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fixed-bed gasifier furnace bottom assembly with an internal filling device, comprising a furnace bottom shell and an ash pan located inside the furnace bottom shell, wherein a fixing ring is disposed below the ash pan, the fixing ring is connected to a large gear ring that drives its rotation, and the side wall of the furnace bottom shell has an opening for a drive gear to enter and mesh with the large gear ring, characterized in that: A filling section is provided between the furnace bottom shell and the ash pan to reduce the amount of high-temperature steam entering.

2. The fixed-bed gasifier hearth assembly with an internal filling device according to claim 1, characterized in that, The furnace bottom shell has a recessed portion that accommodates a large gear ring and a fixing ring. The recessed portion has a first ring edge and a second ring edge. The filling portion includes a first annular filling portion that contacts the first ring edge and a second annular filling portion that contacts the second ring edge.

3. The fixed-bed gasifier hearth assembly with an internal filling device according to claim 2, characterized in that, The filling part also includes a third annular filling part and a fourth annular filling part located on the inner and outer sides of the fixing ring.

4. The fixed-bed gasifier hearth assembly with an internal filling device according to claim 3, characterized in that, The first, second, third, and fourth annular filling portions are all made of refractory cement. The edges of the first, second, third, and fourth annular filling portions are respectively provided with a first annular baffle, a second annular baffle, a third annular baffle, and a fourth annular baffle to facilitate the filling of refractory cement.

5. The fixed-bed gasifier hearth assembly with an internal filling device according to claim 1, characterized in that, The bottom of the ash pan is also equipped with a reinforcing plate.

6. The fixed-bed gasifier hearth assembly with an internal filling device according to claim 1, characterized in that, It also includes ball bearings that support the rotation of the ash pan. The ash pan has an annular upper slide rail near the center, and the furnace bottom shell has an annular lower slide rail near the center that cooperates with the annular upper slide rail. The annular upper slide rail and the annular lower slide rail form a spherical space for placing the ball bearings.

7. The fixed-bed gasifier hearth assembly with an internal filling device according to claim 1, characterized in that, A sealing ring is provided on the outer shell of the furnace bottom.

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