Drying device and gasifier slag recovery equipment

Abstract

The invention relates to the field of slag recovery, and discloses a drying device and gasification furnace slag recovery equipment. The drying device comprises a main body, at least two screens, a heating interlayer and a recovery assembly. A drying cavity and a feeding port located in the top of the drying cavity are formed in the main body. The at least two screens are oppositely arranged in the drying chamber at intervals in the vertical direction, and the diameters of screen holes of the at least two screens are gradually reduced from top to bottom; the heating interlayer is arranged in the side wall of the drying chamber; the recycling assembly is installed on the main body and used for recycling the furnace slag dried in the drying cavity, and the at least two screens are used for receiving the furnace slag entering the drying cavity from the feeding port so as to divide the furnace slag into at least two parts, so that excessive accumulation of the furnace slag is avoided, and the furnace slag drying efficiency is improved. And sufficient heating of the slag is guaranteed, and the drying effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of slag recovery, and in particular to a drying device and gasification furnace slag recovery equipment. Background Art

[0002] In the field of coal chemical industry, gasifier slag is one of the main waste materials. At present, most of the slag can only be stored and landfilled as solid waste, which not only occupies a large amount of land resources, but also causes serious pollution to the soil, water sources and other environments, putting considerable pressure on the ecological environment. The existing solution is to dry the slag and recycle it as a building material admixture. However, the slag can only become a qualified cement admixture when the water content is low. In the existing gasifier slag recovery equipment, the drying device often finds it difficult to dry most of the slag to meet the recycling standards, resulting in a low slag recovery rate. Summary of the Invention

[0003] The present invention aims to overcome the problem in the prior art that the drying device of gasifier slag recovery equipment has difficulty drying most of the slag to a level that meets recycling standards, resulting in a low slag recovery rate. The present invention provides a drying device and gasifier slag recovery equipment. The drying device includes a drying chamber for accommodating the slag, and a heating interlayer is provided in the side wall of the drying chamber. The heating interlayer heats the air in the drying chamber to achieve the purpose of drying the slag. However, the drying device installs at least two screens in the drying chamber. The at least two screens can separate the slag in the drying chamber into multiple sections, thereby preventing excessive accumulation of slag, ensuring sufficient heating of the slag, and greatly improving the drying effect.

[0004] In order to achieve the above object, the present invention provides a drying device, comprising: A main body, which is provided with a drying chamber and a feed port located at the top of the drying chamber; At least two screens are arranged in the drying chamber at intervals along the vertical direction, and the mesh diameters of the at least two screens decrease from top to bottom. The at least two screens are used to receive the slag entering the drying chamber from the feed port to separate the slag into at least two parts. a heating interlayer disposed in a side wall of the drying chamber; and A recovery component is installed on the main body, and is used to recover the slag after drying in the drying chamber.

[0005] Preferably, a recovery hole is provided in the middle of each of the screens; The recovery assembly includes at least two recovery units, and the at least two recovery units are used to correspond one-to-one with at least two screens to recover the slag from the corresponding recovery holes.

[0006] Preferably, each of the recovery units comprises: A recovery pipe is provided on the side wall of the drying chamber, and one end of the recovery pipe away from the corresponding screen extends out from the drying chamber, the recovery pipe is connected to the corresponding recovery hole, and the recovery pipe is arranged to be deflected downward; a baffle movably mounted in the recovery pipe, the baffle having a movable stroke for approaching and moving away from the corresponding recovery hole, and for limiting the slag from entering the recovery pipe from the recovery hole when the baffle approaches the recovery hole; and The first driving member is drivingly connected to the baffle.

[0007] Preferably, at least two of the screens are configured to be conical with the tops facing downward, and each of the recovery holes is disposed close to the top of the corresponding screen.

[0008] Preferably, the drying device further comprises a stirring assembly mounted on the main body, wherein the stirring assembly is configured to correspond to at least two of the screens so as to stir the slag in each of the screens.

[0009] Preferably, the stirring assembly comprises: a rotating rod, rotatably mounted in the drying chamber about an axis in the vertical direction, and passing through the middle portions of at least two of the screens in sequence along the vertical direction; At least two material turning protrusions are protruding from the rotating rod, each of the material turning protrusions extends in the up-down direction and spirally surrounds the rotating rod, and the at least two material turning protrusions are used to correspond one-to-one with at least two of the screens, so that each of the material turning protrusions can extend into the slag in the corresponding screen; and The second driving member is drivingly connected to the rotating rod.

[0010] Preferably, the drying chamber includes a first chamber and a second chamber connected in sequence from top to bottom, at least two screens are arranged in the first chamber, the second chamber is arranged in a conical shape with the top facing downward, and a discharge hole is opened at the top of the second chamber; The rotating rod has a guiding portion extending into the second cavity, and the guiding portion is provided with the material turning protrusion.

[0011] Preferably, the heating interlayer includes a rock wool board arranged around the drying chamber and a coil embedded in the rock wool board, and the coil is used to transport high-temperature gas.

[0012] Preferably, the drying chamber includes a first chamber and a second chamber connected in sequence from top to bottom, at least two screens are arranged in the first chamber, the second chamber is arranged in a conical shape with the top facing downward, and a discharge hole is opened at the top of the second chamber; The recovery component includes a blocking member detachably mounted on the discharge hole.

[0013] Preferably, there are three screens.

[0014] Another aspect of the present invention provides a gasification furnace slag recovery device, comprising the drying device described above.

[0015] Through the above technical solution, the present invention has at least the following beneficial effects: (1) The drying device accommodates the slag to be dried through the drying chamber in the main body, and when the slag enters the drying chamber, it falls into the screen. The sieve hole diameters of at least two of the screens decrease from top to bottom, so the slag with smaller particles will pass through the topmost screen and fall into the next screen for re-screening. Therefore, at least two of the screens will divide the slag into multiple parts, thereby avoiding excessive accumulation of slag, thereby increasing the heating area of ​​the slag and ensuring the drying effect of the drying device. In addition, there is no need to reduce the amount of slag dried each time in pursuit of better drying effect, thereby ensuring the working efficiency of the drying device.

[0016] (2) The sieve hole diameters of at least two of the sieves decrease from top to bottom, so that slag with smaller particles will pass through the top sieve and fall into the sieve of the next layer for re-screening. In other words, the present invention can classify the particle size of slag by using at least two sieves. After the slag is dried, the staff can recycle different parts of the slag separately, so that slag of different particle sizes can be used for different purposes.

[0017] (3) The present invention accommodates slag in the drying chamber for drying. During actual operation, the staff can monitor the temperature in the drying chamber, judge the actual drying effect and actual drying speed of the drying device according to the temperature, and make corresponding adjustments, thereby better adapting to actual work needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional schematic diagram of an embodiment of the drying device proposed by the present invention; Figure 2 yes Figure 1 A magnified schematic diagram of point A in the middle; Figure 3 yes Figure 1 A schematic cross-sectional view of the middle screen and recovery assembly; Figure 4 yes Figure 1 Schematic diagram of the front view of the stirring component.

[0019] Description of Reference Numerals DETAILED DESCRIPTION

[0020] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0021] The endpoints of the ranges and any values ​​disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0022] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or implicitly specify the quantity of the technical features indicated. Therefore, unless otherwise specified, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features; "plurality" means two or more. The term "comprising" and any variations thereof are intended to be non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0023] In addition, terms indicating orientation or positional relationships such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside” are described based on the orientation or relative positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present application, and do not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0024] Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0025] In the field of coal chemical industry, gasifier slag is one of the main waste materials. At present, most of the slag can only be stored and landfilled as solid waste, which not only occupies a large amount of land resources, but also causes serious pollution to the soil, water sources and other environments, putting considerable pressure on the ecological environment. The existing solution is to dry the slag and recycle it as a building material admixture. However, the slag can only become a qualified cement admixture when the water content is low. In the existing gasifier slag recovery equipment, the drying device often finds it difficult to dry most of the slag to meet the recycling standards, resulting in a low slag recovery rate.

[0026] In view of this, the present invention proposes a gasifier slag recovery device, which includes a drying device 100. Any gasifier slag recovery device including the drying device 100 described in the present invention belongs to the gasifier slag recovery device described in this application. Figures 1 to 4 Schematic diagram of the structure of a drying device 100 according to an embodiment of the present invention.

[0027] The drying device 100 of the present invention is further described below through examples. The examples are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operating processes, but the scope of protection of the present invention is not limited to the following examples.

[0028] See also Figures 1 to 3 The drying device 100 proposed in the present invention includes a main body 1, at least two screens 2, a heating interlayer 3, and a recovery component 4. The main body 1 is provided with a drying chamber 11 and a feed port 12 located at the top of the drying chamber 11; at least two screens 2 are arranged in the drying chamber 11 at relative intervals along the vertical direction X, and the mesh diameters of the at least two screens 2 decrease from top to bottom. The at least two screens 2 are used to receive the slag entering the drying chamber 11 from the feed port 12 to separate the slag into at least two parts; the heating interlayer 3 is provided in the side wall of the drying chamber 11; the recovery component 4 is installed in the main body 1, and the recovery component 4 is used to recover the slag after drying in the drying chamber 11.

[0029] In addition, in each embodiment provided by the present invention, the up-down direction X is an absolute up-down direction X.

[0030] In the technical solution of the present invention, the drying device 100 accommodates the slag to be dried through the drying chamber 11 in the main body 1, and when the slag enters the drying chamber 11, it falls into the screen 2. The mesh diameters of at least two of the screens 2 decrease from top to bottom, so that the slag with smaller particles will pass through the topmost screen 2 and fall into the next layer of screen 2 for re-screening. Therefore, at least two of the screens 2 will divide the slag into multiple parts, thereby avoiding excessive accumulation of slag, thereby increasing the heated area of ​​the slag and ensuring the drying effect of the drying device 100. In addition, there is no need to reduce the amount of slag dried each time in pursuit of a better drying effect, thereby ensuring the working efficiency of the drying device 100.

[0031] Secondly, the mesh diameters of at least two of the screens 2 decrease from top to bottom, so smaller slag particles will pass through the topmost screen 2 and fall onto the next screen 2 for further screening. In other words, the present invention enables slag particle size classification using at least two screens 2. After the slag is dried, workers can recycle different portions of the slag separately, allowing slag of different particle sizes to be used for different purposes.

[0032] In addition, the present invention accommodates the slag in the drying chamber 11 for drying. During actual operation, the staff can monitor the temperature in the drying chamber 11, and judge the actual drying effect and actual drying speed of the drying device 100 according to the temperature, and make corresponding adjustments to better meet actual work needs.

[0033] Finally, the main body 1 is actually provided with an exhaust duct on the side wall of the drying chamber 11 for discharging water vapor generated in the drying chamber 11. The exhaust duct is provided on the top wall of the drying chamber 11 and can be configured in an inverted U shape in actual use to prevent external water vapor from entering the drying chamber 11.

[0034] See also Figure 1 and Figure 3 In specific applications, the sizes of the slag on different screens 2 are different, so the time required to dry the slag is also different. In addition, when the slag size is different, the use of the slag may be different, and the slag may also have different requirements for water content. Therefore, in the actual production process, the user may need to end the drying of the slag in different screens 2 in a certain order, and the user may need to recycle the slag in a specific screen 2 at this time. Therefore, in some embodiments, a recovery hole is provided in the middle of each screen 2; the recovery component 4 includes at least two recovery units 41, and the at least two recovery units 41 are used to correspond one-to-one with at least two screens 2 to recover the slag from the corresponding recovery holes.

[0035] When the user needs to recycle the slag in a specific screen 2, this can be done simply by using the recovery unit 41 corresponding to the screen 2. In other words, by dividing the recovery assembly 4 into at least two recovery units 41 and then corresponding the at least two recovery units 41 to at least two screens 2, the slag recovery can be made more flexible, and the drying device 100 can also meet more practical usage needs.

[0036] In some embodiments, each recovery unit 41 includes a recovery pipe 411, a baffle 412, and a first driving member 413. The recovery pipe 411 is provided on the side wall of the drying chamber 11, and the end of the recovery pipe 411 away from the corresponding screen 2 extends from the drying chamber 11. The recovery pipe 411 is connected to the corresponding recovery hole and is tilted downward. The baffle 412 is movably installed in the recovery pipe 411. The baffle 412 has a movable stroke to approach and away from the corresponding recovery hole. The baffle 412 is used to limit the slag from entering the recovery pipe 411 from the recovery hole when approaching the recovery hole. The first driving member 413 is drivingly connected to the baffle 412.

[0037] During drying, the first driving member 413 drives the baffle 412 to move to the corresponding recovery hole, thereby blocking the corresponding recovery hole and placing the recovery hole in a closed state to prevent the slag from leaving the screen 2 through the corresponding recovery hole and entering the recovery pipe 411. When the slag is completely dried, the first driving member 413 drives the baffle 412 away from the corresponding recovery hole, thereby placing the corresponding recovery hole in an open state. At this time, the slag can leave the screen 2 through the recovery hole and enter the recovery pipe 411. The recovery pipe 411 is tilted downward, so that after the slag enters the recovery pipe 411, it will move downward under the action of gravity until it leaves the recovery pipe 411 and the recovery is completed.

[0038] That is, when the slag in a certain screen 2 needs to be recovered, the user only needs to start the first driving member 413 in the corresponding recovery unit 41. It should be noted that the first driving member 413 can be a structure such as a cylinder, an electric cylinder, and a telescopic motor, but no specific limitation is made here.

[0039] In addition, the inner diameter of the recovery pipe 411 should be larger than the aperture of the recovery hole, or the inner diameter of the recovery pipe 411 can be set to gradually expand from top to bottom, so as to avoid the baffle 412 away from the recovery hole hindering the movement of slag in the recovery pipe 411.

[0040] The slag needs to flow from the corresponding screen 2 into the corresponding recovery hole under the action of gravity, so that it can be successfully recovered by the recovery unit 41. However, in actual applications, some slag may remain in the screen 2. Therefore, in some embodiments, at least two of the screens 2 are configured as conical shapes with the tops facing downward, and each recovery hole is located near the top of the corresponding screen 2.

[0041] That is, each of the screens 2 is tilted from top to bottom from its edge to its center, so that the slag is more significantly affected by gravity. Therefore, when the slag needs to be recovered, the corresponding recovery unit 41 will open the corresponding recovery hole, and the slag will enter the corresponding recovery hole under the more obvious effect of gravity, thereby completing the recovery more smoothly.

[0042] See also Figure 1 and Figure 4 In any of the above embodiments, the drying device 100 further includes a stirring assembly 5 mounted on the main body 1. The stirring assembly 5 is configured to correspond to the at least two screens 2 to stir the slag in each of the screens 2. The stirring assembly 5 can stir the slag in the at least two screens 2 to prevent the slag from blocking the meshes of the screens 2, thereby ensuring that the at least two screens 2 can fully and smoothly separate the slag into several portions according to particle size.

[0043] Specifically, the stirring assembly 5 includes a rotating rod 51 , at least two material turning protrusions 52 and a second driving member 53 .

[0044] The rotating rod 51 is rotatably installed in the drying chamber 11 around the axis in the up-down direction X, and the rotating rod 51 passes through the middle parts of at least two of the screens 2 in sequence along the up-down direction X; at least two of the material turning protrusions 52 are protruded from the rotating rod 51, each of the material turning protrusions 52 extends along the up-down direction X and spirally surrounds the rotating rod 51, and at least two of the material turning protrusions 52 are used to correspond one-to-one with at least two of the screens 2, so that each of the material turning protrusions 52 can extend into the slag in the corresponding screen 2; the second driving member 53 is drivingly connected to the rotating rod 51.

[0045] When the slag enters the drying chamber 11, it will fall into the uppermost screen 2, and the slag may clog the meshes of the screen 2. At this time, the second driving member 53 drives the rotating rod 51 to rotate, and the at least two material turning protrusions 52 on the rotating rod 51 rotate accordingly. Each of the material turning protrusions 52 pushes the slag in the corresponding screen 2 to move during rotation, thereby pushing away the slag that is blocking the meshes, allowing the slag to be smoothly screened by the screen 2.

[0046] It should be noted that the second driving member 53 can be specifically configured as a motor, but this is not specifically limited here.

[0047] In actual application, at least two of the screens 2 are relatively spaced apart in the vertical direction X within the drying chamber 11. Therefore, smaller slag may pass through the lowest screen 2 and accumulate on the bottom wall of the drying chamber 11. Therefore, in some embodiments, the drying chamber 11 includes a first chamber 111 and a second chamber 112 that are sequentially connected from top to bottom. At least two of the screens 2 are disposed within the first chamber 111. The second chamber 112 is conical with its top facing downward, and a discharge hole is formed at the top of the second chamber 112. The rotating rod 51 has a guide portion 511 that extends into the second chamber 112, and the guide portion 511 is provided with the material turning protrusion 52.

[0048] After passing through the bottom screen 2, the slag will enter the second chamber 112, and the second chamber 112 is arranged in a conical shape with the top facing downwards, so the slag will accumulate on the top of the second chamber 112 under the action of gravity, and then leave the drying chamber 11 through the discharge hole, which is actually another way to recycle the slag. The volume of the slag entering the second chamber 112 is small, but there is still a small possibility that the slag will clog the discharge hole. Therefore, the rotating rod 51 extends into the second chamber 112 through the guide part 511, and stirs the slag accumulated at the discharge hole through the turning protrusion 52 provided on the guide part 511, ensuring that the slag in the second chamber 112 can be smoothly recovered.

[0049] In addition, the drying device 100 can also replace the bottommost screen 2 with a receiving plate, thereby avoiding the screening of the slag at this stage and preventing the slag from entering the second chamber 112, thereby facilitating subsequent recovery. The drying device 100 can also additionally provide the receiving plate in the second chamber 112, and couple the aforementioned recovery component 4 with the receiving plate to recover the slag on the receiving plate. The recovery unit 41 of the recovery component 4 corresponding to the receiving plate only needs to be adaptively adjusted according to the recovery unit 41 corresponding to the screen 2, and no specific restrictions are imposed here.

[0050] Specifically, see Figures 1 to 2The heating interlayer 3 includes a rock wool board 31 surrounding the drying chamber 11 and a coil 32 embedded within the rock wool board 31. The coil 32 is used to transport high-temperature gas. The high-temperature gas heats the rock wool board 31 through its own heat, which then heats the drying chamber 11. The rock wool layer is filled with rock wool material, but in actual use, the heating interlayer 3 can also be made of graphite material for heat conduction, and the heating medium transported within the coil 32 can also be replaced with a high-temperature liquid, etc.

[0051] The heating method of the heating interlayer 3 is not fixed and can be adjusted according to actual needs and application scenarios, and is not specifically limited here. For example, in the present invention, the drying device 100 is generally used in the slag recovery equipment of the gasifier in the coal chemical production system. Therefore, the high-temperature gas transported in the coil 32 is actually the hot waste carrier gas generated by the rotary dryer, which also reduces the operating cost of the drying device 100 to a certain extent.

[0052] See also Figure 1 In some embodiments, the drying chamber 11 includes a first chamber 111 and a second chamber 112 that are connected in sequence from top to bottom, at least two screens 2 are arranged in the first chamber 111, the second chamber 112 is arranged in a conical shape with the top facing downward, and a discharge hole is opened at the top of the second chamber 112; the recovery component 4 includes a sealing part 42 that can be detachably installed on the discharge hole.

[0053] After passing through the bottom screen 2, the slag enters the second chamber 112. The second chamber 112 is configured in a conical shape with the top facing downward. Therefore, the slag accumulates at the top of the second chamber 112 under the action of gravity, and then leaves the drying chamber 11 through the discharge hole. This is actually another way to recycle the slag. However, the slag in the second chamber 112 also needs to be dried, and the recovery component 4 can block the discharge hole with the sealing member 42 to prevent the slag from leaving the second chamber 112 before drying. When the slag in the second chamber 112 is dried, the user can remove the sealing member 42 to complete the slag recovery.

[0054] In the present invention, there is no limit on the number of the screens 2, and the actual number of the screens 2 can be adjusted according to usage requirements and application scenarios. For example, in one embodiment of the present invention, three screens 2 are provided. The three screens 2 can divide the slag into four parts, which can meet most production needs. However, providing too many screens 2 may increase the difficulty and cost of slag recovery.

[0055] On the other hand, the present invention further proposes a gasifier slag recovery device, which includes the drying device 100 described in any one of the above embodiments. In the gasifier slag recovery device, the slag will first be preliminarily dried by a rotary dryer, and then the slag that has completed the preliminarily drying will be sent to the drying device 100 for deep drying. In other words, what is actually carried out by the drying device 100 is not the first drying process of the slag, but the second drying process for deep drying of the slag, thereby improving the recycling rate of the slag. In addition, the hot waste carrier gas generated by the rotary dryer can also be input into the heating interlayer 3 to heat the drying chamber 11, thereby recovering the waste energy of the rotary dryer to a certain extent and reducing the use cost.

[0056] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A drying device (100), characterized in that: include: A main body (1) is provided with a drying chamber (11) and a feed port (12) located at the top of the drying chamber (11); At least two screens (2) are arranged in the drying chamber (11) at intervals along the up-down direction (X), and the diameters of the sieve holes of the at least two screens (2) decrease from top to bottom. The at least two screens (2) are used to receive the slag entering the drying chamber (11) from the feed port (12) to separate the slag into at least two parts. A heating interlayer (3) is provided in a side wall of the drying chamber (11); and A recovery component (4) is installed on the main body (1), and the recovery component (4) is used to recover the slag after drying in the drying chamber (11).

2. The drying device (100) according to claim 1, characterized in that: A recovery hole is provided in the middle of each of the screens (2); The recovery assembly (4) comprises at least two recovery units (41), and the at least two recovery units (41) are used to correspond one-to-one with at least two screens (2) to recover the slag from the corresponding recovery holes.

3. The drying device (100) according to claim 2, characterized in that: Each of the recovery units (41) comprises: A recovery pipe (411) is provided on the side wall of the drying chamber (11), and one end of the recovery pipe (411) away from the corresponding screen (2) extends out from the drying chamber (11), the recovery pipe (411) is communicated with the corresponding recovery hole, and the recovery pipe (411) is arranged to be tilted downward; a baffle (412) movably mounted in the recovery pipe (411), the baffle (412) having a movable stroke of approaching and moving away from the corresponding recovery hole, and the baffle (412) is used to restrict the slag from entering the recovery pipe (411) from the recovery hole when approaching the recovery hole; and The first driving member (413) is drivingly connected to the baffle (412).

4. The drying device (100) according to claim 2, characterized in that: At least two of the screens (2) are configured to be conical with their tops facing downwards, and each recovery hole is disposed close to the top of the corresponding screen (2).

5. The drying device (100) according to any one of claims 1 to 4, characterized in that: The drying device (100) further comprises a stirring assembly (5) mounted on the main body (1), wherein the stirring assembly (5) is configured to correspond to at least two of the screens (2) so as to stir the slag in each of the screens (2).

6. The drying device (100) according to claim 5, characterized in that: The stirring assembly (5) comprises: A rotating rod (51) is rotatably mounted in the drying chamber (11) about an axis in the up-down direction (X), and the rotating rod (51) sequentially passes through the middle portions of at least two of the screens (2) along the up-down direction (X); At least two material turning protrusions (52) are protruded from the rotating rod (51), each of the material turning protrusions (52) extends along the up-down direction (X) and spirally surrounds the rotating rod (51), and the at least two material turning protrusions (52) are used to correspond one-to-one with at least two of the screens (2), so that each of the material turning protrusions (52) can extend into the slag in the corresponding screen (2); and The second driving member (53) is drivingly connected to the rotating rod (51).

7. The drying device (100) according to claim 6, characterized in that: The drying chamber (11) comprises a first chamber (111) and a second chamber (112) which are connected in sequence from top to bottom, at least two screens (2) are arranged in the first chamber (111), the second chamber (112) is arranged in a conical shape with the top facing downward, and a discharge hole is opened at the top of the second chamber (112); The rotating rod (51) has a guide portion (511) extending into the second chamber (112), and the material turning protrusion (52) is provided on the guide portion (511).

8. The drying device (100) according to claim 1, characterized in that: The heating interlayer (3) comprises a rock wool board (31) arranged around the drying chamber (11) and a coil (32) embedded in the rock wool board (31), wherein the coil (32) is used to transport high-temperature gas.

9. The drying device (100) according to claim 1, characterized in that: The drying chamber (11) comprises a first chamber (111) and a second chamber (112) which are connected in sequence from top to bottom, at least two screens (2) are arranged in the first chamber (111), the second chamber (112) is arranged in a conical shape with the top facing downward, and a discharge hole is opened at the top of the second chamber (112); The recovery assembly (4) comprises a blocking member (42) detachably mounted on the discharge hole.

10. The drying device (100) according to claim 1, characterized in that: The sieves (2) are provided with three.

11. A gasification furnace slag recovery device, characterized in that: Comprising the drying device (100) according to any one of claims 1 to 10.

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