An intermittent fly ash dioxin low temperature degradation system and method

Abstract

The invention discloses an intermittent fly ash dioxin low-temperature degradation system and method, and specifically relates to the technical field of waste incineration fly ash dioxin treatment. In the invention, nitrogen from the external environment enters through a nitrogen supplement port to ensure an oxygen-deficient environment or an oxygen-free environment, and is treated intermittently. Dioxins in the fly ash are discharged after reaching the standard, thereby improving the detoxification efficiency of the fly ash. The spiral shaft and the inner cylinder are respectively driven by respective motors to rotate in the same direction or in different directions. When the spiral shaft and the inner cylinder rotate in the same direction, the feeding and discharging of the fly ash are controlled; when the spiral shaft and the inner cylinder rotate in opposite directions, the residence time of the fly ash in the inner cylinder is controlled, which is beneficial to the stirring and mixing of the fly ash material. At the same time, the batch treatment method enables the dioxins in the fly ash to be fully degraded. The two sleeves lose the connection restriction with the connecting sleeve shell, which is convenient for the sleeves to be flipped and opened. The flipping and opening synchronously drives the sealing strip to be opened, thereby facilitating the removal of the residual fly ash material in the sealing strip.

Description

Technical Field

[0001] The invention relates to the technical field of waste incineration fly ash dioxin treatment, in particular to an intermittent fly ash dioxin low-temperature degradation system and method. Background Art

[0002] Fly ash is a solid waste produced by the incineration of domestic waste, and its production accounts for about 3% to 10% of the total waste incineration. Fly ash is rich in valuable components such as calcium, silicon, and aluminum, and is suitable for recycling as a raw material for building materials. However, fly ash also contains harmful substances such as dioxins and heavy metals, which makes it listed as hazardous waste (HW18 category). The characteristic that chloride salts account for about 20% also makes it easy to dissolve and cause pollution to the environment. Therefore, fly ash must be harmlessly treated to control environmental risks before it can be discharged or reused. Dioxin is an organic compound with strong biological toxicity. Thermal treatment technology of fly ash is considered to be one of the best ways to degrade dioxins in fly ash.

[0003] After searching, the invention patent with publication number CN113814259B discloses a low-temperature degradation device and method for dioxins in fly ash from garbage incineration. It adopts a two-stage heating furnace, which can not only ensure the degradation of dioxins in the solid phase of fly ash, but also make the dioxins and organic pollutant gases desorbed from the gas phase fully degraded in the second-stage spiral heating furnace. It has high efficiency, simple operation and high economy.

[0004] Fly ash stays in the rotary furnace cylinder for a short time, and after entering the cylinder, the sealing of the connection is not high, which can easily lead to the oxygen content of the gas being unable to be guaranteed, affecting the degradation of fly ash. Summary of the invention

[0005] The purpose of the present invention is to provide an intermittent fly ash dioxin low-temperature degradation system and method, wherein nitrogen from the external environment enters through a nitrogen supplement port to ensure an oxygen-deficient environment or an oxygen-free environment, and is processed intermittently, and dioxins in the fly ash are discharged after reaching the standard, thereby improving the detoxification efficiency of the fly ash. The spiral shaft and the inner cylinder are respectively driven by their own motors to rotate in the same direction or in opposite directions. When the spiral shaft and the inner cylinder rotate in the same direction, the feeding and discharging of the fly ash are controlled; when the spiral shaft and the inner cylinder rotate in opposite directions, the residence time of the fly ash in the inner cylinder is controlled, which is beneficial to the stirring and mixing of the fly ash material. The two sets of blocks are uniform, and the batch processing method enables the dioxins in the fly ash to be fully degraded. After use, the two sets of blocks connected to the sealing strip in the forced sealing assembly can be rotated to open. When opening, the block moves from the slot to the position of the vacant part. In the moving state, the side and inclined surfaces of the block are squeezed to limit the compression block to shrink inward, and the side limit of the block is released. At this time, the two sets of blocks lose the connection restriction with the connecting shell, which is convenient for the set of blocks to be flipped open. The flipping and opening simultaneously drives the sealing strip to open, which is convenient for removing the residual fly ash material in the sealing strip, so as to solve the problems mentioned in the above background technology.

[0006] The present invention can be implemented through the following technical scheme: an intermittent fly ash dioxin low-temperature degradation system, comprising an outer shell installed in the middle of the top surface of a base, a horizontally placed inner cylinder body is rotatably installed inside the outer shell, both ends of the inner cylinder body are rotatably connected with connecting shells, and the two connecting shells are fixed above the base, one end of the connecting shell is connected to a conveying chamber, and the inner end surface of the other connecting shell is rotatably installed with a spiral shaft, and the rotation direction of the spiral shaft and the inner cylinder body is the same direction or opposite directions. A forced sealing component is provided at the connection between the inner cylinder body and the two connecting shells, and the forced sealing component includes a fixed ring fixedly sleeved on the outside of the inner cylinder body and a sleeve ring slidably arranged on the connecting shell, and the sleeve ring includes two sleeve blocks rotatably arranged, and the outer surface of the sleeve block is provided with a connected moving groove, and two piston blocks are slidably installed inside the moving groove, and the ends of the two piston blocks are rotatably arranged, and the fitting ends of the two piston blocks are provided with two magnets of magnetic attraction, and the fixed ring and the end surfaces of the two piston blocks are connected with sealing strips.

[0007] A further technical improvement of the present invention is that two card slots are provided on the outer wall surface of the connecting sleeve, and a card block fixed to the inner wall surface of the sleeve block is provided inside each of the card slots for limited sliding, and a limiting pressure block for blocking the side of the card block is elastically installed on the inner wall surface of the card slot, and both ends of the surface of the limiting pressure block are set as inclined surfaces, and the ends of the card slots are provided with a vacant portion for the card block to leave.

[0008] A further technical improvement of the present invention is that a nitrogen replenishing port for nitrogen entry is provided on the surface of one of the connecting shells, a discharge chamber is connected to the end of the other connecting shell, and an ash storage box is provided below the connection between the inner cylinder and the two connecting shells.

[0009] A further technical improvement of the present invention lies in that a travel electromagnet and a locking seat are respectively installed on the surface of one side where the two sleeve blocks are in contact with each other, and a pull rod is installed on the outer wall surface of the sleeve block, the travel electromagnet rotates on the side of the sleeve block, and the pushing end of the travel electromagnet is connected to a push block, a through groove for the push block to enter is provided on the surface of the locking seat, and a locking groove which is connected to the through groove and is engaged with the push block is provided at the bottom of the locking seat.

[0010] A further technical improvement of the present invention is that a cushion block is fitted on the bottom surface of the connecting sleeve close to the conveying chamber, a supporting vertical plate is fixed to the bottom surface of the cushion block, an electric push rod 2 is arranged on one side of the supporting vertical plate, a pushing end of the electric push rod 2 is fixedly connected to a push plate 2 with a U-shaped structure, and clamping blocks for clamping and fixing the outer wall of the connecting sleeve are hinged on both end surfaces of the push plate 2, and the connecting end of the clamping block is hinged to the end surface of the cushion block.

[0011] A further technical improvement of the present invention lies in that an electric push rod is installed on the other side surface of the supporting vertical plate, and the fixed end of the electric push rod is fixedly installed above the base through a bracket. A sliding groove is provided at the end of the top surface of the base, and a sliding plate is provided in the internal limiting sliding of the sliding groove. The top surface of the sliding plate is fixed to the supporting frame at the bottom of the conveying chamber, and the sliding plate is fixed to the bottom surface of the supporting vertical plate.

[0012] A further technical improvement of the present invention is that a material bin is provided on the top surface of the conveying chamber, and a feeding sealing assembly is sleeved at the connection between the discharge end of the conveying chamber and the feed end of the connecting sleeve, the feeding sealing assembly includes two fitting sleeves, and two groups of locking assemblies are installed on the outer surfaces of the fitting sleeves, the locking assembly includes two fixed seats arranged on the outer wall surfaces of the sleeves, a telescopic cylinder is rotatably installed inside one of the fixed seats, the end of the telescopic cylinder is connected to a circular positioning plate, and a positioning groove cavity is provided on the surface of the other fixed seat for the telescopic cylinder to pass through and to be engaged with the circular positioning plate.

[0013] A further technical improvement of the present invention is that an airbag is installed on the inner wall surface of the end of the sleeve, a push plate with an annular structure is installed on the end of the airbag, a buffer ring block is provided at the end of the push plate, the two buffer ring blocks are clamped with each other, the air inlet end of the airbag is connected to an air pipe, the end of the air pipe is connected to an air pump, and the air pump is arranged on a support frame at the bottom of the conveying chamber.

[0014] The present invention also provides an intermittent fly ash dioxin low-temperature degradation method, which specifically comprises the following steps:

[0015] Step 1: First, fit the two sleeves together and fasten them together. The airbag expands to push the two push plates together to connect the discharge end of the conveying chamber with the feed end of the connecting sleeve.

[0016] Step 2: Use a pad to assist in supporting the bottom of the connecting shell, and use the electric push rod to push the push plate 2 upward so that the two clamping blocks rotate at the same time and contact with the outer wall of the connecting shell to ensure the stability of the connecting shell;

[0017] Step 3: The card block slides into the end of the card slot and the limiting pressure block pushes the side of the card block. After the ends of the two sleeve blocks are connected, the connection between the connecting sleeve shell and the inner cylinder is forcibly sealed;

[0018] Step 4: The fly ash is transported into the inner cylinder through the conveying chamber. The rotation direction of the inner cylinder is the same or opposite to the rotation direction of the spiral shaft in the middle. When the rotation direction is the same, the feeding and discharging of the fly ash are controlled; when the rotation direction is reversed, the residence time of the fly ash is controlled.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Nitrogen from the external environment enters through the nitrogen replenishment port to ensure an oxygen-deficient or oxygen-free environment, and is processed intermittently. Dioxins in fly ash are discharged after meeting the standards, which improves the detoxification efficiency of fly ash. The spiral shaft and the inner cylinder are driven by their own motors to rotate in the same or opposite directions. When the spiral shaft and the inner cylinder rotate in the same direction, the feeding and discharging of fly ash are controlled; when the spiral shaft and the inner cylinder rotate in opposite directions, the residence time of fly ash in the inner cylinder is controlled, which is conducive to the stirring and mixing of fly ash materials. At the same time, the batch processing method enables dioxins in fly ash to be fully degraded. After use, the two sleeves connected to the sealing strip in the forced sealing assembly can be rotated and opened. When opening, the block moves from the slot to the position of the vacant part. In the moving state, the side and inclined surface of the block squeeze the limiting block to shrink inward, releasing the side limit of the block. At this time, the two sleeves lose the connection restriction with the connecting shell, which is convenient for the sleeve to flip open. The flip opening synchronously drives the sealing strip to open, which is convenient for removing the residual fly ash material in the sealing strip.

[0021] 2. Insert the end of the extended push block into the locking seat through the through slot and the locking slot, and connect the two sets of blocks together. When the sealing strip needs to be opened, the travel electromagnet opens to push the push block out of the locking slot in the locking seat, and flips and toggles the travel electromagnet, so that the ends of the two sets of blocks are free from restrictions, which is convenient for cleaning the residual fly ash materials on the opened sealing strip;

[0022] 3. Push the push plate 2 upwards through the electric push rod 2. The rise of the push plate 2 causes the two clamping blocks and the end faces of the cushion block to rotate at the same time. The two clamping blocks abut against the outer wall of the connecting sleeve to ensure the stability of the connecting sleeve. The two connecting sleeves are fixed on the base separately and are not fixed together with the inner cylinder, so that the inner cylinder and the spiral shaft can move in the same direction or in the opposite direction.

[0023] 4. Fix the two sleeves, and then supply air from the air pump. The gas enters through the air pipe to inflate the airbag and pushes the two push plates to press together, connecting the discharge end of the conveying chamber with the feed end of the connecting sleeve, so that the sealing of the conveying is better and the sealing performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the planar structure of the present invention;

[0026] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0027] Figure 3 It is a three-dimensional structural schematic diagram of the sleeve of the present invention;

[0028] Figure 4 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0029] Figure 5 It is a schematic diagram of the structural connection between the sleeve block and the piston block of the present invention;

[0030] Figure 6 It is a three-dimensional structural schematic diagram of the set block of the present invention;

[0031] Figure 7 It is a schematic diagram of the structural connection between the travel electromagnet and the locking seat of the present invention;

[0032] Figure 8 It is a schematic diagram of the structural connection between the connecting sleeve and the cushion block of the present invention.

[0033] In the figure: 1, base; 2, outer shell; 3, inner cylinder; 4, connecting shell; 5, nitrogen replenishing port; 6, air pump; 7, conveying chamber; 8, ash storage box; 9, discharge chamber; 10, sleeve seat; 11, air bag; 12, air pipe; 13, push plate 1; 14, buffer ring block; 15, fixed seat; 16, telescopic cylinder; 17, positioning groove cavity; 18, card slot; 19, card block; 20, sleeve block; 21, piston block; 22, sealing strip; 23, electric push rod 1; 24, support vertical plate; 25, limit pressure block; 26, magnet stone; 27, electric push rod 2; 28, cushion block; 29, push plate 2; 30, clamping block; 31, moving groove; 32, pull rod; 33, travel electromagnet; 34, locking seat; 35, through groove; 36, locking groove; 37, push block. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] See also Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the present invention provides an intermittent fly ash dioxin low-temperature degradation system, comprising a base 1, a shell 2 is fixed in the middle of the top surface of the base 1, a horizontally placed inner cylinder 3 is rotatably installed inside the shell 2, both ends of the inner cylinder 3 are rotatably connected with connecting shells 4, the two connecting shells 4 are fixed above the base 1, one end of the connecting shell 4 is connected to the conveying chamber 7, and the inner end surface of the other connecting shell 4 is rotatably installed with a spiral shaft, the spiral shaft and the inner cylinder 3 are rotated in the same direction or in different directions, and the outer wall of the inner cylinder 3 is provided with a circle of resistance wire for the inner cylinder The material in the body 3 is indirectly heated, which avoids the effects of melting or coking caused by excessive local temperature, and ensures the normal use of the inner cylinder 3. A forced sealing component is provided at the connection between the inner cylinder 3 and the two connecting sleeves 4. The forced sealing component includes a fixed ring fixedly sleeved on the outside of the inner cylinder 3 and a sleeve ring slidably arranged on the connecting sleeve 4. The sleeve ring includes two sleeve blocks 20 that are rotatably arranged. The outer surface of the sleeve block 20 is provided with a connected motion groove 31. Two piston blocks 21 are slidably installed inside the motion groove 31. The ends of the two piston blocks 21 are rotatably arranged, and the contact between the two piston blocks 21 ... Two magnets 26 of magnetic attraction are arranged at the joint end, and sealing strips 22 are connected to the end surfaces of the fixing ring and the two piston blocks 21. Two card grooves 18 are arranged on the outer wall surface of the connecting sleeve 4, and each card groove 18 has a card block 19 fixedly connected to the inner wall surface of the sleeve block 20 for limited sliding inside, and a limiting pressure block 25 for blocking the side of the card block 19 is elastically installed on the inner wall surface of the card groove 18, and both ends of the surface of the limiting pressure block 25 are arranged as inclined surfaces, and a vacant part for the card block 19 to leave is arranged at the end of the card groove 18, so that the discharge end of the conveying chamber 7 is connected to the feed end of the connecting sleeve 4, and the flying The ash material is conveyed by the spiral conveyor 7 and enters the inner cylinder 3 along the connecting shell 4. Since the connection between the inner cylinder 3 and the two connecting shells 4 is forced to be sealed, the oxygen content in the inner cylinder 3 can be well controlled. Nitrogen from the external environment enters through the nitrogen replenishment port 5 to ensure an oxygen-deficient environment or an oxygen-free environment, and is processed intermittently. Dioxins in the fly ash are discharged after meeting the standards, thereby improving the detoxification efficiency of the fly ash. The spiral shaft and the inner cylinder 3 are respectively driven by their own motors to rotate in the same direction or in different directions. When the spiral shaft and the inner cylinder 3 rotate in the same direction, the feeding and discharging of the fly ash are controlled;When the spiral shaft and the inner cylinder 3 rotate in opposite directions, the residence time of the fly ash in the inner cylinder 3 is controlled, which is conducive to the stirring and mixing of the fly ash material. At the same time, the batch processing method can fully degrade the dioxins in the fly ash. After use, the two sleeves 20 connected by the sealing strip 22 in the forced sealing assembly can be rotated to open. When opening, the block 19 moves from the slot 18 to the position of the vacant part. In the moving state, the side and inclined surface of the block 19 squeeze the limiting block 25 to shrink inward, releasing the side limit of the block 19. At this time, the two sleeves 20 lose the connection restriction with the connecting sleeve 4, which is convenient for the sleeve 20 to flip open, and the flip opening synchronously drives the sealing strip 22 to open, which is convenient for removing the residual fly ash material in the sealing strip 22. ;

[0036] See also Figure 6-Figure 7 As shown, a travel electromagnet 33 and a locking seat 34 are respectively installed on the surface of one side where the two sleeve blocks 20 are in contact, and a pull rod 32 is installed on the outer wall of the sleeve block 20. The travel electromagnet 33 rotates on the side of the sleeve block 20, and the pushing end of the travel electromagnet 33 is connected to a push block 37. A through groove 35 for the push block 37 to enter is provided on the surface of the locking seat 34, and a locking groove 36 that is communicated with the through groove 35 and is engaged with the push block 37 is provided at the bottom of the locking seat 34. The sleeve block 20 is moved by the pull rod 32 to make the ends of the two sleeve blocks 20 fit together, and then the travel electromagnet 33 is flipped and moved, and at the same time, the travel electromagnet The magnet 33 pushes the push block 37 to extend, and the end of the extended push block 37 enters the locking seat 34 through the through groove 35 and the locking groove 36. Then the travel electromagnet 33 is reset, and the push block 37 is retracted and in close contact with the inner wall surface of the locking groove 36, connecting the two sleeve blocks 20 together, making it convenient to slide the two sleeve blocks 20 to the ends of the card slot 18. When the sealing strip 22 needs to be opened, the travel electromagnet 33 opens and pushes the push block 37 to leave the locking groove 36 in the locking seat 34, and flips and toggles the travel electromagnet 33, so that the ends of the two sleeve blocks 20 are no longer restricted, making it convenient to open the sealing strip 22.

[0037] See also Figure 1 As shown, a nitrogen replenishing port 5 for nitrogen entry is provided on the surface of one of the connecting shells 4, a discharge chamber 9 is connected to the end of the other connecting shell 4, and an ash storage box 8 is provided below the connection between the inner cylinder 3 and the two connecting shells 4. After the sealing strip 22 is opened, the remaining fly ash material on the sealing strip 22 falls into the ash storage box 8.

[0038] See also Figure 1 and Figure 8As shown, a cushion block 28 is fitted on the bottom surface of the connecting casing 4 near the conveying chamber 7, a supporting vertical plate 24 is fixed on the bottom surface of the cushion block 28, an electric push rod 27 is arranged on one side of the supporting vertical plate 24, a U-shaped push plate 29 is fixed to the pushing end of the electric push rod 27, a clamping block 30 for clamping and fixing the outer wall of the connecting casing 4 is hinged on both end surfaces of the push plate 29, and the connecting end of the clamping block 30 is hinged to the end surface of the cushion block 28; an electric push rod 1 23 is installed on the other side surface of the supporting vertical plate 24, and the fixed end of the electric push rod 1 23 is fixedly installed above the base 1 through a bracket. A sliding groove is provided at the end of the top surface of the base 1, and a sliding plate is slidingly provided inside the sliding groove. The top surface of the sliding plate is fixed to the support frame at the bottom of the conveying chamber 7, and the sliding plate is fixed to the bottom surface of the supporting vertical plate 24. The push plate 29 is pushed upward by the electric push rod 27. The rise of the push plate 29 causes the two clamping blocks 30 and the end surfaces of the cushion block 28 to rotate at the same time. The two clamping blocks 30 are in abutment with the outer wall surface of the connecting sleeve 4 to ensure the stability of the connecting sleeve 4. The two connecting sleeves 4 are fixed on the base 1 separately and are not fixed together with the inner cylinder 3, thereby realizing the same or reverse movement of the inner cylinder 3 and the spiral shaft.

[0039] See also Figure 1-Figure 3 As shown, a silo is provided on the top surface of the conveying chamber 7, and a feeding sealing assembly is sleeved at the connection between the discharge end of the conveying chamber 7 and the feed end of the connecting sleeve 4. The feeding sealing assembly includes two fitting sleeves 10, and two sets of locking assemblies are installed on the outer surface of the fitting sleeves 10. The locking assembly includes two fixed seats 15 arranged on the outer wall surface of the sleeve 10, and a telescopic cylinder 16 is rotatably installed inside one of the fixed seats 15, and the end of the telescopic cylinder 16 is connected to a circular positioning plate, and a positioning groove cavity 17 for the telescopic cylinder 16 to pass through and to be engaged with the circular positioning plate is provided on the surface of the other fixed seat 15; an airbag 11 is installed on the inner wall surface of the end of the sleeve 10, and a push plate 13 with an annular structure is fitted on the end of the airbag 11, and a buffer pad is provided at the end of the push plate 13. The ring block 14 and the two buffer ring blocks 14 are clamped with each other. The air inlet end of the airbag 11 is connected with the air pipe 12. The end of the air pipe 12 is connected with the air pump 6. The air pump 6 is arranged on the support frame at the bottom of the conveying chamber 7. The ends of the two sleeves 10 are fitted together, and the telescopic cylinder 16 is turned over and pulled, so that the telescopic cylinder 16 is extended while the end of the telescopic cylinder 16 passes through the positioning groove 17. The external force acting on the telescopic cylinder 16 is removed, and the circular positioning plate at the end of the telescopic cylinder 16 is clamped with the positioning groove 17 to fix the two sleeves 10. After that, the air pump 6 supplies air. The gas enters through the air pipe 12 to inflate the airbag 11 and pushes the two push plates 13 to press together, connecting the discharge end of the conveying chamber 7 with the feed end of the connecting sleeve 4, so that the sealing of the feeding is better and the sealing performance is improved.

[0040] The present invention also provides an intermittent fly ash dioxin low-temperature degradation method, which specifically comprises the following steps:

[0041] Step 1: First, fit the two sleeves 10 together and fasten them together. The airbag 11 is inflated to push the two push plates 13 together, and the discharge end of the conveying chamber 7 is connected to the feed end of the connecting sleeve 4;

[0042] Step 2: The bottom of the connecting housing 4 is supported by the cushion block 28, and the push plate 29 is pushed up by the electric push rod 27 so that the two clamping blocks 30 rotate at the same time and contact with the outer wall of the connecting housing 4 to ensure the stability of the connecting housing 4;

[0043] Step 3: The block 19 slides into the end of the slot 18 and the limiting pressing block 25 pushes the side of the block 19. After the ends of the two sleeves 20 are connected, the connection between the connecting sleeve 4 and the inner cylinder 3 is forcibly sealed;

[0044] Step 4: The fly ash is transported into the inner cylinder 3 through the conveying chamber 7. The rotation direction of the inner cylinder 3 is the same or opposite to the rotation direction of the spiral shaft in the middle. When the rotation direction is the same, the feeding and discharging of the fly ash are controlled; when the rotation direction is reversed, the residence time of the fly ash is controlled.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An intermittent fly ash dioxin low-temperature degradation system, comprising an outer shell (2) mounted in the middle of the top surface of a base (1), a horizontally placed inner cylinder (3) rotatably mounted inside the outer shell (2), both ends of the inner cylinder (3) being rotatably connected to connecting sleeves (4), and both connecting sleeves (4) being fixed above the base (1), characterized in that: The end of one of the connecting sleeves (4) is connected to a conveying chamber (7), and a spiral shaft is rotatably mounted on the inner end surface of the other connecting sleeve (4), and the spiral shaft rotates in the same direction or in opposite directions as the inner cylinder (3). A forced sealing assembly is provided at the connection between the inner cylinder (3) and the two connecting sleeves (4), and the forced sealing assembly comprises a fixed ring fixedly mounted on the outside of the inner cylinder (3) and a sleeve ring slidably mounted on the connecting sleeve (4), and the sleeve ring comprises two sleeve blocks (20) rotatably mounted, and the outer surface of the sleeve block (20) is provided with a connected movement groove (31), and two piston blocks (21) are slidably mounted inside the movement groove (31), and the ends of the two piston blocks (21) are rotatably mounted, and the mating ends of the two piston blocks (21) are provided with two magnets (26) for magnetic attraction, and the fixed ring and the end surfaces of the two piston blocks (21) are both connected with sealing strips (22); A cushion block (28) is provided on the bottom surface of the connecting casing (4) near the conveying chamber (7), a supporting vertical plate (24) is fixed on the bottom surface of the cushion block (28), a second electric push rod (27) is provided on one side of the supporting vertical plate (24), a second push plate (29) of a U-shaped structure is fixedly connected to the pushing end of the second electric push rod (27), a clamping block (30) for clamping and fixing the outer wall surface of the connecting casing (4) is hingedly connected to the two end surfaces of the second push plate (29), and the connecting end of the clamping block (30) is hingedly connected to the end surface of the cushion block (28); An electric push rod (23) is mounted on the other side surface of the support vertical plate (24), and the fixed end of the electric push rod (23) is fixedly mounted above the base (1) through a bracket. A sliding groove is provided at the end of the top surface of the base (1), and a sliding plate is provided inside the sliding groove for limited sliding. The top surface of the sliding plate is fixed to a support frame at the bottom of the conveying chamber (7), and the sliding plate is fixed to the bottom surface of the support vertical plate (24).

2. The intermittent fly ash dioxin low temperature degradation system according to claim 1, characterized in that: Two clamping grooves (18) are provided on the outer wall surface of the connecting sleeve (4), and a clamping block (19) fixedly connected to the inner wall surface of the sleeve block (20) is provided inside each of the clamping grooves (18) for limited sliding, and a limiting pressure block (25) for blocking the side of the clamping block (19) is elastically mounted on the inner wall surface of the clamping groove (18), and both ends of the surface of the limiting pressure block (25) are arranged as inclined surfaces, and a vacant portion for the clamping block (19) to leave is provided at the end of the clamping groove (18).

3. The intermittent fly ash dioxin low temperature degradation system according to claim 1, characterized in that: A nitrogen replenishing port (5) for nitrogen to enter is provided on the surface of one of the connecting shells (4), a discharge chamber (9) is connected to the end of the other connecting shell (4), and an ash storage box (8) is provided below the connection between the inner cylinder (3) and the two connecting shells (4).

4. The intermittent fly ash dioxin low temperature degradation system according to claim 1, characterized in that: A travel electromagnet (33) and a locking seat (34) are respectively installed on the surfaces of one side of the two sleeve blocks (20) that are in contact with each other, and a pull rod (32) is installed on the outer wall surface of the sleeve block (20). The travel electromagnet (33) rotates on the side of the sleeve block (20), and the pushing end of the travel electromagnet (33) is connected to a push block (37). A through groove (35) for the push block (37) to enter is provided on the surface of the locking seat (34), and a locking groove (36) that communicates with the through groove (35) and is engaged with the push block (37) is provided at the bottom of the locking seat (34).

5. The intermittent fly ash dioxin low temperature degradation system according to claim 1, characterized in that: A material bin is provided on the top surface of the conveying chamber (7), and a feeding sealing assembly is sleeved at the connection between the discharge end of the conveying chamber (7) and the feed end of the connecting sleeve (4). The feeding sealing assembly includes two sleeves (10) that fit together, and two sets of locking assemblies are installed on the outer surfaces of the sleeves (10) that fit together. The locking assembly includes two fixed seats (15) that are arranged on the outer wall surface of the sleeve (10), wherein a telescopic cylinder (16) is rotatably installed inside one of the fixed seats (15), and the end of the telescopic cylinder (16) is connected to a circular positioning plate, and a positioning groove cavity (17) is provided on the surface of the other fixed seat (15) for the telescopic cylinder (16) to pass through and to be engaged with the circular positioning plate.

6. The intermittent fly ash dioxin low temperature degradation system according to claim 5, characterized in that: An airbag (11) is installed on the inner wall surface of the end of the sleeve (10), and a push plate (13) with an annular structure is fitted on the end of the airbag (11), and a buffer ring block (14) is provided at the end of the push plate (13). The two buffer ring blocks (14) are mutually engaged, and the air inlet end of the airbag (11) is connected to an air pipe (12), and the end of the air pipe (12) is connected to an air pump (6), and the air pump (6) is arranged on a support frame at the bottom of the conveying chamber (7).

7. A low-temperature degradation method for an intermittent fly ash dioxin low-temperature degradation system according to any one of claims 1 to 6, characterized in that: The low temperature degradation method specifically comprises the following steps: Step 1: First, the two sleeves (10) are fitted together and fastened together, and the two push plates (13) are pressed together by the expansion of the airbag (11), so as to connect the discharge end of the conveying chamber (7) and the feed end of the connecting sleeve (4); Step 2: auxiliary support is provided to the bottom of the connecting casing (4) by means of a cushion block (28), and the second push plate (29) is pushed upward by means of the second electric push rod (27) so that the two clamping blocks (30) rotate simultaneously and contact with the outer wall surface of the connecting casing (4), thereby ensuring the stability of the connecting casing (4); Step 3: The clamping block (19) slides into the end of the clamping groove (18) and the limiting pressing block (25) pushes the side of the clamping block (19). After the ends of the two sleeve blocks (20) are connected, the connection between the connecting sleeve shell (4) and the inner cylinder (3) is forcibly sealed; Step 4: fly ash is transported into the inner cylinder (3) through the transport chamber (7). The rotation direction of the inner cylinder (3) is the same as or opposite to the rotation direction of the spiral shaft in the middle. When the rotation direction is the same, the feeding and discharging of the fly ash are controlled; when the rotation direction is opposite, the residence time of the fly ash is controlled.

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