Gasification fine slag dewatering and drying device based on filtrate recovery

Abstract

The invention discloses a gasified fine slag dewatering and drying device based on filtrate recovery, relates to the technical field of gasified fine slag dewatering, and is characterized in that complete dewatering of gasified fine slag is jointly completed through a synergistic dewatering structure which mainly combines vibration dewatering with filter-pressing dewatering and assists in hot air drying, and in the filter-pressing dewatering process, the filter-pressing space mode can be actively controlled; reciprocating filter pressing is carried out on the fine residues in the dewatering gap, synchronous intermittent operation of a filter pressing stage and a cake withdrawing stage is achieved, then the double filter pressing effect of soft filter pressing and tight filter pressing is achieved through intermittent change of the dewatering gap, and the dewatering and drying efficiency of the fine residues is improved. The two are combined to jointly achieve synergistic dehydration formed by mechanical pressure and vibration coupling in the gasification fine slag dehydration process, stable dehydration of gasification fine slag in the filtrate recovery process is formed, and the phenomena that a filter cake is sticky and cannot be removed, and road water seepage and soil pollution caused by transportation or field management are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gasification fine slag dehydration, and specifically relates to a gasification fine slag dehydration and drying device based on filtrate recovery. Background Art

[0002] Coal gasification refers to the process in which coal reacts with a gasifying agent under high-temperature normal pressure or pressurized conditions to be converted into gas products and a small amount of residue. The coal gasification process can be used to produce fuel gas for industrial kiln furnaces and city gas, and also to produce synthesis gas as a raw material for synthesizing ammonia, methanol, and synthetic liquid fuels.

[0003] The ash residues generated in the coal gasification process are mainly divided into coarse slag and fine slag. The coarse slag is in a molten state at high temperature and is discharged from the furnace bottom. The gas flow rate in the gasifier is too fast, and the reaction time between pulverized coal and the gasifying agent is limited. The gasification fine slag formed by the unreacted residual carbon mixed with the molten ash particles formed by the complete reaction is carried out by the gas and then undergoes fine slag dehydration in the gasification workshop.

[0004] During the fine slag dehydration in the gasification workshop, the traditional treatment method is to use a vacuum belt filter to dehydrate the gasification fine slag. During the dehydration process, fresh water needs to be continuously used to wash the filter cloth, which not only causes waste of water resources, but also leads to problems such as sticky filter cakes of the dehydrated fine slag, road seepage and soil pollution in transportation and on-site management. Therefore, this application proposes a solution. Summary of the Invention

[0005] The purpose of the present invention is to provide a gasification fine slag dehydration and drying device based on filtrate recovery, which is used to solve the problems proposed in the above background art. It is a collaborative dehydration formed by the cooperation of mechanical pressure and vibration coupling, forming stable dehydration of the gasification fine slag during the filtrate recovery process. Specifically, it is a collaborative dehydration structure mainly based on vibration dehydration combined with pressure filtration dehydration and supplemented by hot air drying, jointly completing the complete dehydration of the gasification fine slag. During the pressure filtration dehydration process, the fine slag in the dehydration gap can be reciprocally pressure filtered by actively controlling the pressure filtration space, and the "pressure filtration stage" and the "cake discharging stage" are synchronously intermittent, improving the efficiency of fine slag dehydration and drying.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A gasification fine slag dehydration and drying device based on filtrate recovery, including a vibration box body arranged on a bottom plate. One end of the vibration box body is provided with a slag inlet, and a horizontal folding plate is arranged in the middle of the vibration box body. A hot pressing assembly is installed at one end of the folding plate.

[0007] The hot pressing assembly includes an inner tooth sleeve and a plurality of outer tooth ring pressing plates sleeved with each other. An inner concave groove is formed on the inner wall of the inner tooth sleeve. An outer convex ejector rod is installed on the outer wall of the outer tooth ring pressing plate, and a sealing rubber strip is jointly installed between the inner ends of adjacent outer tooth ring pressing plates.

[0008] An execution assembly for driving displacement is installed inside the outer tooth ring pressing plate. Each outer tooth ring pressing plate reciprocates radially to change the gap with the inner tooth sleeve. One end of the vibration box corresponding to the inner tooth sleeve is penetrated and installed with a hot gas inlet pipe communicating with the gaps between the outer tooth ring pressing plate and the inner tooth sleeve.

[0009] It is further set that: fine holes for filtrate seepage are formed on the folded plate, and a drainage cavity for filtrate collection is obliquely arranged at the lower end of the vibration box corresponding to the folded plate.

[0010] It is further set that: a slag inlet plate is installed at one end of the vibration box close to the slag inlet, and a material dividing fork is installed at the lower end of the slag inlet plate corresponding to the slag inlet.

[0011] It is further set that: a slag discharge port is formed at the lower end of the vibration box corresponding to the inner tooth sleeve, a feed port is formed on the inner tooth sleeve corresponding to the feeding direction of the folded plate, a folding plate is arranged outside the inner tooth sleeve corresponding to the feed port, and the inner tooth sleeve makes the feed port and the slag discharge port communicate alternately through a driving assembly.

[0012] It is further set that: the execution assembly includes a driving motor arranged outside the vibration box. A rotating rod is installed at the output end of the driving motor. The rotating rod is connected with a rotating column, and a moving cylinder connected with the outer tooth ring pressing plate is externally threaded on the rotating column.

[0013] It is further set that: the moving cylinder is provided with a hinge rod seat corresponding to each outer tooth ring pressing plate. A connecting rod rotatably connected with the inner wall of the outer tooth ring pressing plate is rotatably installed on the hinge rod seat. A guiding block slidably connected with the vibration box is installed at one end of each outer tooth ring pressing plate far away from the driving motor.

[0014] It is further set that: vibration motors are symmetrically distributed on the top of the vibration box. A through hole is formed at one end of the vibration box far away from the slag inlet, and spring columns connected with the bottom plate are installed at the bottom of the vibration box.

[0015] It is further set that: the folded plate includes a horizontal structure section and an inclined upward structure section, and the hot pressing assembly is arranged at the tail of the inclined upward structure section.

[0016] It is further set that: the inner concave groove is a continuous smooth curve "L" groove structure, and the outer convex ejector rod matches one end of the inner concave groove.

[0017] The present invention has the following beneficial effects:

[0018] 1. In the present invention, through a cooperative dehydration structure mainly composed of vibration dehydration combined with pressure filtration dehydration and supplemented by hot gas drying, the complete dehydration of gasification fine slag is jointly completed. During the pressure filtration dehydration process, the pressure filtration space can be actively controlled to reciprocally pressure filter the fine slag in the dehydration gap and synchronously and intermittently carry out the "pressure filtration stage" and the "cake discharging stage", improving the dehydration and drying efficiency of the fine slag;

[0019] 2. Then, the double pressure filtration effect of soft pressure filtration + tight re-pressure filtration is achieved through the intermittent change of the dehydration gap, improving the dehydration and drying efficiency of the fine slag. Specifically, during the radial movement of the outer tooth ring pressing plates distributed at intervals, the sealing rubber strips complete the supplementation of the gaps on the adjacent sides of the outer tooth ring pressing plates, so that the fine slag material between the outer tooth ring pressing plates only undergoes soft pressure filtration. Then, through the staggered positions of the outer convex ejector rods on the outer tooth ring pressing plates and the inner concave grooves on the inner tooth sleeves, the tight re-pressure filtration of the fine slag material between the outer tooth ring pressing plates is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic bottom view structural diagram of the present invention;

[0023] Figure 3 is a schematic side sectional view of the present invention;

[0024] Figure 4 is a schematic partial structural sectional view of the hot pressing assembly of the present invention;

[0025] Figure 5 is a schematic structural disassembly diagram of the hot pressing assembly of the present invention;

[0026] Figure 6 is a schematic structural disassembly diagram of the execution assembly of the present invention;

[0027] Figure 7 is a schematic front sectional view of the hot pressing assembly of the present invention;

[0028] Figure 8 is a schematic sectional view of the initial state - A, cake discharging stage - B, and pressure filtration stage - C of the hot pressing assembly of the present invention;

[0029] Figure 9 This is a side cross-sectional view of the hot pressing assembly of the present invention.

[0030] In the figure: 1, bottom plate; 2, vibrating box body; 3, slag inlet plate; 4, material distribution fork; 5, vibrating motor; 6, spring column; 7, slag discharge port; 8, hot gas inlet pipe; 9, through port; 10, slag inlet; 11, folded plate; 12, drainage cavity; 13, hot pressing assembly; 14, internal gear sleeve; 15, driving motor; 16, rotating rod; 17, external gear ring pressing plate; 18, guiding block; 19, rotating column; 20, inner concave groove; 21, external convex ejector rod; 22, feeding port; 23, folding plate; 24, moving cylinder; 25, hinge rod seat; 26, connecting rod; 27, sealing strip. Specific embodiments

[0031] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0032] Embodiment 1: Refer to Figure 1 - Figure 9 As shown, the gasification fine slag dewatering and drying device based on filtrate recovery in this embodiment includes a vibrating box body 2 arranged on a bottom plate 1. An inlet slag port 10 is arranged at one end of the vibrating box body 2. A horizontally arranged folded plate 11 is arranged in the middle of the vibrating box body 2. A hot pressing assembly 13 is installed at one end of the folded plate 11;

[0033] The hot pressing assembly 13 includes an internally toothed sleeve 14 and a plurality of externally toothed ring pressing plates 17 sleeved with each other. An inner concave groove 20 is formed on the inner wall of the internally toothed sleeve 14. An externally convex ejector rod 21 is installed on the outer wall of the externally toothed ring pressing plate 17. The inner concave groove 20 is a continuous smooth curve "L" groove structure. The externally convex ejector rod 21 matches one end of the inner concave groove 20. A sealing strip 27 is commonly installed between the inner ends of adjacent externally toothed ring pressing plates 17. The setting of the sealing strip 27 is to improve the sealing performance of the entire dewatering gap during the radial movement of the externally toothed ring pressing plate 17.

[0034] Each outer tooth ring pressing plate 17 reciprocates radially to change the gap with the inner tooth sleeve 14. One end of the vibration box body 2 corresponding to the inner tooth sleeve 14 is penetrated and installed with a hot gas inlet pipe 8 that is connected to the gap between the outer tooth ring pressing plate 17 and the inner tooth sleeve 14. By driving the outer tooth ring pressing plate 17 to move radially through the execution component, the gap with the inner tooth sleeve 14 is changed. During this process, after the fine slag between the dehydration gaps is subjected to adjustable pressure filtration, hot gas is immediately blown in through the hot gas inlet pipe 8, so as to complete the complete dehydration of the gasified fine slag through the coordinated dehydration action mainly based on pressure filtration dehydration and supplemented by hot gas drying.

[0035] A slag discharge port 7 is opened at the lower end of the vibration box body 2 corresponding to the inner tooth sleeve 14. A feed port 22 is opened in the inner tooth sleeve 14 corresponding to the feed direction of the folded plate 11. A folding plate 23 is arranged outside the inner tooth sleeve 14 corresponding to the feed port 22. The inner tooth sleeve 14 makes the feed port 22 and the slag discharge port 7 communicate alternately through the driving component. The purpose of this setting is:

[0036] The inner tooth sleeve 14 is driven to rotate by an external driving component. The external driving component includes a second driving motor (not shown in the figure) and is set according to the needs of those skilled in the art. The second driving motor drives the inner tooth sleeve 14 to rotate, so as to switch back and forth between the situation where the feed port 22 corresponds to the feed direction of the folded plate 11 and the situation where the feed port 22 corresponds to the slag discharge port 7, and finally achieve smooth feeding and discharging before and after the fine slag is dehydrated.

[0037] Refer to Figure 8 As shown, during the rotation of the inner tooth sleeve 14 and when the feed port 22 is in the closed state, the dislocation between the inner tooth sleeve 14 and the outer tooth ring pressing plate 17 is completed, prompting a progressive matching pressure filtration action between the inner concave groove 20 and the outer convex top rod 21. That is, the reciprocating contact process between the two ends of the outer convex top rod 21 and the inner concave groove 20 is realized by progressive contact, and respectively constitutes a pressure filtration action and a cake discharging action, achieving the purpose of free switching between pressure filtration and cake discharging.

[0038] Vibration motors 5 are symmetrically installed on the top of the vibration box body 2. A through port 9 is opened at one end of the vibration box body 2 far from the slag inlet 10. Spring columns 6 connected to the bottom plate 1 are installed at the bottom of the vibration box body 2. During the operation of the vibration box body 2, an air flow through channel is formed by the through port 9 and the slag inlet 10, and buffering is achieved through the spring columns 6, which is a well-known structural design to those skilled in the art.

[0039] The folding plate 11 is provided with fine holes for filtrate seepage, and a drainage cavity 12 for filtrate collection is obliquely arranged at the lower end of the vibration box body 2 corresponding to the folding plate 11. The folding plate 11 includes a horizontal structure section and an inclined upward structure section. The hot pressing assembly 13 is arranged at the tail of the inclined upward structure section. The setting of the two-stage folding plate 11 can divide the vibration dehydration in the fine slag dehydration process into two stages. The first stage realizes the stable feeding of the fine slag material, and the second stage evenly distributes the fine slag material by means of inclined feeding to ensure the continuous progress of the subsequent mechanical pressure dehydration stage.

[0040] An inlet slag plate 3 is installed at one end of the vibration box body 2 close to the slag inlet 10. A material distribution fork 4 is installed at the lower end of the inlet slag plate 3 corresponding to the slag inlet 10. During the feeding process, the material distribution fork 4 provides preliminary screening of the fine slag material. When the large-particle fine slag material impacts on the material distribution fork 4, it will constitute the subdivision of the material, which is beneficial to the smooth progress of the subsequent high-frequency vibration dehydration.

[0041] Basic principle: It is a collaborative dehydration formed by the cooperation of mechanical pressure and vibration coupling to achieve stable dehydration of the gasified fine slag in the filtrate recovery process. Specifically, it is a collaborative dehydration structure mainly based on vibration dehydration combined with pressure filtration dehydration and supplemented by hot air drying to jointly complete the complete dehydration of the gasified fine slag. During the pressure filtration dehydration process, the fine slag in the dehydration gap can be reciprocally pressure-filtered by actively controlling the pressure filtration space, and the "pressure filtration stage" and the "cake discharging stage" are synchronously intermittent, improving the dehydration and drying efficiency of the fine slag.

[0042] Embodiment 2: Based on the hot pressing assembly in Embodiment 1, regarding how to realize the reciprocating movement of each outer tooth ring pressing plate 17 in the radial direction to change the gap with the inner tooth sleeve 14, it includes: an execution assembly for driving displacement is installed inside the outer tooth ring pressing plate 17;

[0043] The execution assembly includes a driving motor 15 arranged outside the vibration box body 2. A rotating rod 16 is installed at the output end of the driving motor 15. The rotating rod 16 is connected with a rotating column 19. A moving cylinder 24 connected to the outer tooth ring pressing plate 17 is sleeved on the rotating column 19 in a threaded manner. A hinged rod seat 25 is installed on the moving cylinder 24 corresponding to each outer tooth ring pressing plate 17. A connecting rod 26 rotatably connected to the inner wall of the outer tooth ring pressing plate 17 is rotatably installed on the hinged rod seat 25. A guiding block 18 slidably connected to the vibration box body 2 is installed at one end of each outer tooth ring pressing plate 17 away from the driving motor 15;

[0044] During this process, the driving motor 15 starts to drive the rotating column 19 to rotate, and the moving cylinder 24 outside the rotating column 19 undergoes axial movement. The moving cylinder 24 drives the outer tooth ring pressing plate 17 to complete radial expansion and contraction through the connecting rod 26, changing the dehydration gap between the outer tooth ring pressing plate 17 and the inner tooth sleeve 14.

[0045] It should be noted that when the dehydration gap changes, during the radial movement of the outer tooth ring pressing plate 17 with an interval distribution, the sealing rubber strip 27 completes the supplementation of the gap on the adjacent side of the outer tooth ring pressing plate 17, so that the fine slag material between the outer tooth ring pressing plates 17 only undergoes relatively soft pressure filtration.

[0046] As the staggered positions of the outer convex ejector rods 21 on the outer tooth ring pressing plate 17 and the inner concave grooves 20 on the inner tooth sleeve 14 are continuously moved and changed, the fine slag material between the outer tooth ring pressing plates 17 is tightly re-pressed. Thus, the fine slag material after vibration dehydration can achieve a dual pressure filtration effect, and under the setting method of intermittently changing positions at intervals, the fine slag material can obtain the combined effect of vibration dehydration + mechanical pressure dehydration. With the continuous injection of a hot air drying atmosphere, the dehydration efficiency of the gasified fine slag material is further improved.

[0047] In summary: The intermittent change of the dehydration gap is used to achieve a dual pressure filtration effect. Specifically, during the radial movement of the outer tooth ring pressing plates 17 with an interval distribution, the sealing rubber strip 27 completes the supplementation of the gap on the adjacent side of the outer tooth ring pressing plates 17, so that the fine slag material between the outer tooth ring pressing plates 17 only undergoes soft pressure filtration; then, the staggered positions of the outer convex ejector rods 21 on the outer tooth ring pressing plate 17 and the inner concave grooves 20 on the inner tooth sleeve 14 are used to achieve the tight re-pressing of the fine slag material between the outer tooth ring pressing plates 17.

[0048] Example 3: This example combines the technical contents of Example 1 and Example 2 to form the following gasified fine slag dehydration and drying method:

[0049] Step 1: The gasified fine slag enters the vibration box body 2 through the slag inlet plate 3 and the material distribution fork 4. During the feeding process, the material distribution fork 4 provides preliminary screening of the fine slag material. When the large particle fine slag material impacts the material distribution fork 4, the material will be subdivided and fall onto the folded plate 11.

[0050] Step 2: Under the continuous vibration effect of the vibration motor 5, the setting of the two-stage folded plate 11 can divide the vibration dehydration during the fine slag dehydration process into two stages. The first stage realizes the stable feeding of the fine slag material, and the second stage evenly distributes the fine slag material by means of inclined feeding to ensure the continuous progress of the subsequent mechanical pressure dehydration stage.

[0051] Step 3: The gasified fine slag that has completed mechanical vibration by the folded plate 11 enters the hot pressing assembly 13 through the feed port 22. The driving motor two drives the inner tooth sleeve 14 to rotate. During the rotation of the inner tooth sleeve 14 and when the feed port 22 is in the closed state, the misalignment between the inner tooth sleeve 14 and the outer tooth ring pressing plate 17 is completed, prompting a progressive matching pressure filtration action between the inner concave groove 20 and the outer convex ejector rod 21 to achieve the purpose of freely switching between pressure filtration and cake discharging.

[0052] Step 4: In Step 3, the driving motor 15 starts to drive the rotating column 19 to rotate, and the moving cylinder 24 outside the rotating column 19 undergoes axial movement. The moving cylinder 24 drives the outer tooth ring pressing plate 17 to complete radial expansion and contraction through the connecting rod 26, thereby changing the dehydration gap between the outer tooth ring pressing plate 17 and the inner tooth sleeve 14;

[0053] Step 5: In Step 3, hot air is also blown in through the hot air inlet pipe 8, so as to complete the complete dehydration of the gasified fine slag through the cooperative dehydration action mainly based on pressure filtration dehydration and supplemented by hot air drying.

[0054] In summary, it is a cooperative dehydration structure mainly based on vibration dehydration combined with pressure filtration dehydration and supplemented by hot air drying that jointly completes the complete dehydration of the gasified fine slag. During the pressure filtration dehydration process, the pressure filtration space can be actively controlled to reciprocally filter the fine slag in the dehydration gap and synchronously perform the "pressure filtration stage" and the "cake discharging stage" intermittently, improving the dehydration and drying efficiency of the fine slag.

[0055] The intermittent change of the dehydration gap is used to achieve a double pressure filtration effect. Specifically, during the radial movement of the intermittently distributed outer tooth ring pressing plates 17, the sealing rubber strip 27 completes the supplementation of the gaps on the adjacent sides of the outer tooth ring pressing plates 17, so that the fine slag material between the outer tooth ring pressing plates 17 only undergoes soft pressure filtration. Then, through the staggered positions of the outer convex ejector rods 21 on the outer tooth ring pressing plates 17 and the inner concave grooves 20 on the inner tooth sleeves 14, the fine slag material between the outer tooth ring pressing plates 17 is tightly re-pressed; the combination of the two jointly achieves the cooperative dehydration formed by the mechanical pressure and vibration coupling during the dehydration process of the gasified fine slag, forming stable dehydration of the gasified fine slag during the filtrate recovery process, and avoiding the phenomena of sticky filter cake that cannot be removed, road seepage and soil pollution during transportation or on-site management.

[0056] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. Gasification fine slag dehydration and drying device based on filtrate recovery, characterized in that It includes a vibration box body (2) arranged on a bottom plate (1). An inlet slag port (10) is arranged at one end of the vibration box body (2). A horizontal folded plate (11) is arranged in the middle of the vibration box body (2). A hot pressing assembly (13) is installed at one end of the folded plate (11). The hot pressing assembly (13) includes an internally toothed sleeve (14) and a plurality of externally toothed ring pressing plates (17) sleeved with each other. An inner concave groove (20) is formed on the inner wall of the internally toothed sleeve (14). An externally convex ejector rod (21) is installed on the outer wall of the externally toothed ring pressing plate (17). And a sealing rubber strip (27) is jointly installed between the inner ends of adjacent externally toothed ring pressing plates (17). An actuating assembly for driving displacement is installed inside the externally toothed ring pressing plate (17). Each externally toothed ring pressing plate (17) reciprocates in the radial direction to change the gap with the internally toothed sleeve (14). A hot gas inlet pipe (8) communicating with the gaps between the externally toothed ring pressing plate (17) and the internally toothed sleeve (14) is installed through the corresponding end of the vibration box body (2) for the internally toothed sleeve (14).

2. The gasification fine slag dewatering and drying device based on filtrate recovery according to claim 1, wherein Fine holes for filtrate seepage are formed on the folded plate (11). And a drainage cavity (12) for filtrate collection is obliquely arranged at the lower end of the vibration box body (2) corresponding to the folded plate (11).

3. The gasification fine slag dewatering and drying device based on filtrate recovery according to claim 1, wherein, An inlet slag plate (3) is installed at one end of the vibration box body (2) close to the inlet slag port (10). A material dividing fork (4) is installed at the lower end of the inlet slag plate (3) corresponding to the inlet slag port (10).

4. The gasification fine slag dewatering and drying device based on filtrate recovery according to claim 1, wherein A discharge slag port (7) is formed at the lower end of the vibration box body (2) corresponding to the internally toothed sleeve (14). A feed inlet (22) is formed on the internally toothed sleeve (14) corresponding to the feed direction of the folded plate (11). A folding plate (23) is arranged outside the internally toothed sleeve (14) corresponding to the feed inlet (22). The internally toothed sleeve (14) makes the feed inlet (22) and the discharge slag port (7) communicate alternately through a driving assembly.

5. The gasification fine slag dehydration and drying device based on filtrate recovery according to claim 1, characterized in that, The actuating assembly includes a driving motor (15) arranged outside the vibration box body (2). A rotating rod (16) is installed at the output end of the driving motor (15). The rotating rod (16) is connected with a rotating column (19). A moving cylinder (24) connected with the externally toothed ring pressing plate (17) is externally threaded and sleeved on the rotating column (19).

6. The gasification fine slag dehydration and drying device based on filtrate recovery according to claim 5, wherein, The moving cylinder (24) is provided with a hinged rod seat (25) corresponding to each externally toothed ring pressing plate (17). A connecting rod (26) rotatably connected with the inner wall of the externally toothed ring pressing plate (17) is rotatably installed on the hinged rod seat (25). A guiding block (18) slidably connected with the vibration box body (2) is installed at one end of each externally toothed ring pressing plate (17) far away from the driving motor (15).

7. The gasification fine slag dewatering and drying device based on filtrate recovery according to claim 1, wherein, Vibration motors (5) symmetrically distributed are installed at the top of the vibration box body (2). A through opening (9) is formed at one end of the vibration box body (2) far away from the inlet slag port (10). Spring columns (6) connected with the bottom plate (1) are installed at the bottom of the vibration box body (2).

8. The gasification fine slag dewatering and drying device based on filtrate recovery according to claim 2, characterized in that The folded plate (11) includes a horizontal structure section and an inclined upward structure section. The hot pressing assembly (13) is arranged at the tail of the inclined upward structure section.

9. The gasification fine slag dewatering and drying device based on filtrate recovery according to claim 1, characterized in that, The concave groove (20) is a continuous smooth curve "L" groove structure, and the convex ejector rod (21) matches one end of the concave groove (20).

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