Fly ash low-temperature pyrolysis desorption device

Abstract

The utility model discloses a fly ash low-temperature pyrolysis desorption device, which overcomes the problems that a feeding bin of a pyrolysis desorption device in the prior art is easily blocked by fly ash and is easily caked on the inner wall of a pyrolysis desorption cylinder, the pyrolysis effect of the fly ash is influenced and the device is easily damaged, and comprises a feeding mechanism and a pyrolysis desorption mechanism which are connected with each other, the feeding mechanism comprises a feeding bin, a driving device is arranged on the outer wall of the feeding bin, a permanent magnet is arranged on the driving device, a movable iron plate is arranged on the inner wall of the feeding bin, and a material cleaning assembly is arranged in the movable iron plate; the pyrolysis desorption mechanism comprises a pyrolysis desorption cylinder, an ash cleaning assembly is arranged in the pyrolysis desorption cylinder, and one end of the outer side of the pyrolysis desorption cylinder is connected with a rotating device. A rotary material cleaning mode is adopted, so that fly ash can be prevented from bridging in the feeding bin to form blockage in the bin; and caked fly ash on the inner wall of the pyrolysis desorption barrel can be crushed and cleaned, the pyrolysis desorption efficiency of the fly ash is improved, and the device is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage incineration fly ash processing technical field, especially relates to a kind of fly ash low-temperature pyrolysis desorption device. BACKGROUND

[0002] Economic rapid development and urban population grow constantly, resulting in huge and growing amount of domestic waste, and incineration is still the mainstream processing mode of domestic waste, but fly ash generated after garbage incineration contains a large amount of heavy metals and dioxin, and needs further harmless treatment. The main means of traditional fly ash disposal is solidification / stabilization landfill, which on the one hand occupies a large amount of limited land resources, and on the other hand does not eliminate the potential environmental risk of toxic dioxin and heavy metals to the environment. Therefore, the resource utilization technology of fly ash generated from domestic waste incineration will be the development direction of future fly ash disposal.

[0003] At present, the resource utilization of fly ash generated from domestic waste incineration mainly includes low-temperature pyrolysis desorption, which is a fly ash pretreatment process. However, due to the fine particle size and light weight of fly ash, bridging may occur during feeding, causing abnormal feeding. Moreover, fly ash may adhere to the cylinder wall during pyrolysis, causing uneven heating of the cylinder wall, affecting the pyrolysis effect of fly ash, and even causing damage to the device over time. SUMMARY

[0004] The utility model discloses a kind of fly ash low-temperature pyrolysis desorption devices, adopt the mode of rotating material cleaning, fly ash can be prevented from bridging in feed bin, form bin plugging;Fly ash agglomerated on the inner wall of pyrolysis desorption cylinder can also be broken and cleaned, improve the pyrolysis desorption efficiency of fly ash, prevent device damage.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of fly ash low-temperature pyrolysis desorption device, including mutually connected feeding mechanism and pyrolysis desorption mechanism, the feeding mechanism includes feed bin, the outer wall of the feed bin is equipped with driving device, driving device is equipped with permanent magnet, the inner wall of the feed bin is equipped with movable iron plate, movable iron plate is equipped with material cleaning assembly inside;The pyrolysis desorption mechanism includes pyrolysis desorption cylinder, the inside of the pyrolysis desorption cylinder is equipped with ash cleaning assembly, and one end of the outer side of the pyrolysis desorption cylinder is connected with rotating device.

[0007] The fly ash low-temperature pyrolysis desorption device provided by the utility model, when in use, fly ash enters the feeding bin, the driving device drives the permanent magnet to make circular motion, because the permanent magnet produces attraction to the movable iron plate of the inner wall of the feeding bin, the cleaning assembly is installed in the movable iron plate, therefore when the permanent magnet of the outer wall of the feeding bin makes circular motion around the feeding bin, the cleaning assembly in the feeding bin can be driven to move, thereby fly ash cleaning of the inner wall of the feeding bin is carried out, and the fly ash bridging and blocking in the bin are prevented.

[0008] As preferred, the driving device comprises a gear ring arranged around the outer wall of the feeding bin and a driving gear engaged with the gear ring, the driving gear is connected with a motor through a connecting rod, and the permanent magnet is installed on the side surface of the connecting rod.

[0009] As preferred, the ash cleaning assembly comprises a hydraulic pump, the hydraulic pump is connected with a telescopic mechanism, a supporting rod is arranged on the telescopic mechanism, an arc-shaped spade is arranged at the top end of the supporting rod, and the arc-shaped spade is in abutment with the inner wall of the pyrolysis desorption cylinder.

[0010] As preferred, the telescopic mechanism comprises a first telescopic rod connected with the hydraulic pump, the first telescopic rod is connected with a second telescopic rod, the second telescopic rod is connected with a third telescopic rod, supporting rods are arranged on the first telescopic rod, the second telescopic rod and the third telescopic rod, and the supporting rods are cross-installed.

[0011] As preferred, the cleaning assembly comprises a first roller and an arc-shaped scraper, the first roller is installed on the movable iron plate, the arc-shaped scraper is installed on the roller, and the arc-shaped scraper is in abutment with the inner wall of the feeding bin.

[0012] As preferred, the inner wall of the feeding bin is provided with an annular groove, the bottom of the annular groove is provided with a sliding rail, the bottom of the movable iron plate is provided with a second roller, and the second roller is embedded in the sliding rail.

[0013] As preferred, the movable iron plate is provided with a U-shaped groove, and the cleaning assembly is installed in the U-shaped groove.

[0014] As preferred, the bottom of the permanent magnet is provided with a supporting plate, and the supporting plate is provided with a baffle.

[0015] As preferred, the utility model further comprises a tail gas treatment device, and the tail gas treatment device is connected with the pyrolysis desorption cylinder through an exhaust pipeline.

[0016] As preferred, the outer wall of the pyrolysis desorption cylinder is provided with a heating furnace, the discharge port of the pyrolysis desorption cylinder is provided with a discharge cover, and the discharge port is provided with a rotary valve.

[0017] Therefore, the utility model has following beneficial effect:

[0018] 1, fly ash into feed bin, drive device drives permanent magnet to do circumferential motion, because permanent magnet produces attractive force to movable iron plate in feed bin inner wall, clear material subassembly is installed in movable iron plate, therefore when permanent magnet around feed bin does circumferential motion in feed bin outer wall, can drive clear material subassembly in the inside motion of feed bin, to carry out fly ash clear material to feed bin inner wall, prevent fly ash bridge plugging in the bin.

[0019] 2, fly ash in pyrolysis desorption process, rotation device starts, drive pyrolysis desorption cylinder rotation, simultaneously, telescopic mechanism is driven under the drive of hydraulic pump to retract, to break up and clean the incrustation fly ash of pyrolysis desorption cylinder inner wall.

[0020] 3, arc-shaped scraper can break up large block fly ash in the process of rotating clear material, facilitate subsequent pyrolysis desorption;Ash cleaning subassembly can also support pyrolysis desorption cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall structure schematic view of fly ash low-temperature pyrolysis desorption device in the utility model.

[0022] Figure 2 It is the structure schematic view of feed mechanism in the utility model.

[0023] Figure 3 It is the structure schematic view of movable iron plate in the utility model.

[0024] Figure 4 It is the front view of clear material subassembly in the utility model.

[0025] Figure 5 It is the side view of ash cleaning subassembly in the utility model.

[0026] In the drawing: 1, pyrolysis desorption device;11, feed mechanism;12, thermal desorption mechanism;13, support platform;111, feed pipeline;112, feed bin;121, pyrolysis desorption cylinder;122, chain;123, motor;124, ash cleaning subassembly;125, discharge port;1121, first gear ring;1122, support plate;1123, motor;1124, drive gear;1125, permanent magnet;1126, movable iron plate;1127, clear material subassembly;1211, heating furnace;1221, second gear ring;1241, first telescopic rod;1242, second telescopic rod;1243, third telescopic rod;1244, support rod;1245, circular arc-shaped spade;1246, hydraulic pump;11261, U-shaped groove;11262, first roller;11271, second roller;11272, arc-shaped scraper;12441, screw thread. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0028] Example 1:

[0029] This embodiment describes a low-temperature thermal desorption device for fly ash, the overall structure of which is as follows: Figure 1 As shown, the heat desorption device 1 includes: a feeding mechanism 11, a heat desorption mechanism 12, and a support platform 13. The feeding mechanism includes a feeding pipe 111, the other end of which is connected to the inlet of the heat desorption mechanism. Both the feeding mechanism and the heat desorption mechanism are installed on the support platform.

[0030] When the fly ash low-temperature thermal desorption device is working, the fly ash enters from the feeding mechanism and enters the thermal desorption mechanism through the feeding pipe of the feeding mechanism for thermal desorption.

[0031] The fly ash low-temperature thermal desorption device provided in this embodiment will be further described below with reference to its specific structure.

[0032] like Figure 2 As shown, the feeding mechanism includes a feeding bin 112 and a feeding pipe 111. One end of the feeding pipe is connected to the outlet of the feeding bin, and the other end of the feeding pipe is connected to the inlet of the heat desorption mechanism.

[0033] The feeding hopper includes a first gear ring 1121, a drive gear 1124, a first motor 1123, a permanent magnet 1125, a support plate 1122, a movable iron plate 1126, and a cleaning assembly 1127. The first gear ring is annularly surrounding the outer wall of the feeding hopper. The drive gear and the first motor are connected by a connecting rod. A permanent magnet is fixedly connected to the side of the connecting rod. The movable iron plate is set inside the inner wall of the feeding hopper. The cleaning assembly is embedded in the groove on the movable iron plate and rotates to clean the fly ash inside the hopper.

[0034] Specifically, the drive gear and the first gear ring mesh with each other. During operation, the first motor drives the drive gear to rotate on the first gear ring through the connecting rod.

[0035] A support plate is installed under the permanent magnet, and there are inwardly inclined baffles around the support plate to keep the permanent magnet stable during the rotation of the gear.

[0036] like Figure 3As shown, the bottom of the movable iron plate is provided with a first roller 11262, the center of the movable iron plate is provided with a U-shaped groove 11261, and the top of the movable iron plate is provided with a cover plate. An annular groove for accommodating the movable iron plate is arranged in the interior of the feeding bin, and a sliding rail is arranged at the bottom of the annular groove; the first roller at the bottom of the movable iron plate is embedded in the sliding rail, so that the movable iron plate can be prevented from coming out of the annular groove. The U-shaped groove at the center of the movable iron plate is used to load the material cleaning assembly; and the cover plate at the top of the movable iron plate is used to prevent the material cleaning assembly from coming out and affecting the feeding of fly ash.

[0037] As shown in the drawings, Figure 4 The material cleaning assembly includes a second roller 11271 and an arc-shaped scraper 11272, which are connected by means of a latch, so that the arc-shaped scraper can be replaced.

[0038] As shown in the drawings, Figure 1 The pyrolysis desorption mechanism includes a pyrolysis desorption cylinder 121, a second motor 123, a chain 122, and an ash cleaning assembly 124. The end connected to the feeding bin of the pyrolysis desorption cylinder is the first end of the pyrolysis desorption cylinder (i.e., the feeding port of the pyrolysis desorption cylinder), the discharge port 125 of the pyrolysis desorption cylinder is the second end of the pyrolysis desorption cylinder, and the pyrolysis desorption cylinder can rotate.

[0039] The second motor is installed at the first end of the pyrolysis desorption cylinder, and the ash cleaning assembly is installed inside the pyrolysis desorption cylinder.

[0040] Specifically, the first end of the pyrolysis desorption cylinder is connected with a ring-shaped second gear ring 1221, the second gear ring is connected with the second motor through a chain, and the pyrolysis desorption cylinder is driven to rotate by the second motor.

[0041] The ash cleaning assembly is arranged at the center of the pyrolysis desorption cylinder, as shown in the drawings, Figure 5 The ash cleaning assembly includes a main body and a branch body, the branch body is installed on the main body, the main body includes a first telescopic rod 1241, a second telescopic rod 1242, a third telescopic rod 1243, and a hydraulic pump 1246, and the branch body includes a support rod 1244 and a circular arc-shaped shovel 1245. Among them, the first telescopic rod, the second telescopic rod, and the third telescopic rod are all provided with a support rod, and the circular arc-shaped shovel is installed at the top end of the support rod.

[0042] During operation, the hydraulic pump changes the hydraulic oil pressure to make the telescopic rod move directionally.

[0043] In this embodiment, the diameters of the first telescopic rod, the second telescopic rod, and the third telescopic rod of the ash cleaning assembly decrease in turn, the support rods are arranged at the positions close to the second end of the pyrolysis desorption cylinder and are distributed in cross, so that the telescopic rods can clean the cylinder in all directions in addition to the clamping effect.

[0044] In the embodiment, the support rod top is provided with a thread 12441, which is matched with the internal thread of the arc-shaped scraper to realize installation of the arc-shaped scraper and facilitate replacement.

[0045] The working principle of the fly ash low-temperature pyrolysis desorption device is as follows:

[0046] When the fly ash enters the feeding bin 112, the first motor 1123 is opened, and the first motor drives the driving gear 1124 to make a circular motion on the first gear ring 1121 through the connecting rod. Since the connecting rod is also fixedly installed with a permanent magnet 1125, the permanent magnet generates an attractive force on the movable iron plate 1126 of the inner wall of the feeding bin. Since the movable iron plate is internally provided with a U-shaped groove 11261, the ash cleaning assembly 1127 is just accommodated in the U-shaped groove. Moreover, the movable iron plate is provided with a roller 11262 at the bottom, and when the permanent magnet outside the feeding bin makes a circular motion around the feeding bin, the movable iron plate inside the feeding bin can be driven to move, further driving the arc-shaped scraper 11272 installed on the movable iron plate to move, so as to realize cleaning of the fly ash inside the feeding bin and prevent the fly ash in the bin from bridging and blocking.

[0047] During the pyrolysis desorption process of the fly ash, part of the fly ash is scaled on the inner wall of the pyrolysis desorption cylinder 121. At this time, the first telescopic rod 1241, the second telescopic rod 1242 and the third telescopic rod 1243 are subjected to directional telescopic movement by the change of the hydraulic oil pressure of the hydraulic pump 1246, and the three telescopic rods are cross-installed with a support rod 1244, and the support rod is installed with an arc-shaped scraper 1245 through a thread 12441. During the rotation of the pyrolysis desorption cylinder, the arc-shaped scraper on the support rod is driven by the hydraulic pump 1246 to break and clean the scaled fly ash on the inner wall of the pyrolysis desorption cylinder.

[0048] Based on the above structure and working process, the fly ash low-temperature pyrolysis desorption device provided by the embodiment has the following beneficial effects:

[0049] 1. Since the permanent magnet generates an attractive force on the movable iron plate of the inner wall of the feeding bin, the ash cleaning assembly is installed in the movable iron plate, and after the fly ash enters the feeding bin, the driving device drives the permanent magnet to make a circular motion around the feeding bin, thereby driving the ash cleaning assembly inside the feeding bin to move, so as to clean the fly ash on the inner wall of the feeding bin and prevent the fly ash in the bin from bridging and blocking.

[0050] 2. During the pyrolysis desorption process of the fly ash, the rotating device drives the pyrolysis desorption cylinder to rotate, and at the same time, the telescopic mechanism is subjected to telescopic movement under the driving of the hydraulic pump, so as to break and clean the scaled fly ash on the inner wall of the pyrolysis desorption cylinder.

[0051] 3. The arc-shaped scraper can break large clumped fly ash during the rotation and cleaning process, which is convenient for subsequent pyrolysis desorption; and the ash and slag cleaning assembly can also support the pyrolysis desorption cylinder.

[0052] Embodiment two:

[0053] The embodiment provides a fly ash low-temperature pyrolysis desorption device which is further optimized on the basis of the embodiment one.

[0054] Specifically,

[0055] The embodiment provides a fly ash low-temperature pyrolysis desorption device which comprises a feeding mechanism 11, a pyrolysis desorption mechanism 12, a supporting platform 13 and a tail gas treatment mechanism, the feeding mechanism comprises a feeding pipeline 111 and a feeding bin 112, one end of the feeding pipeline is connected with the outlet of the feeding bin, the other end of the feeding pipeline is connected with the feeding port of the pyrolysis desorption mechanism, the tail gas treatment mechanism is installed at the discharging port of the pyrolysis mechanism, and the feeding mechanism and the pyrolysis desorption mechanism are both installed on the supporting platform.

[0056] The fly ash low-temperature pyrolysis desorption device utilizes the basic principle of pyrolysis or thermal desorption, and volatilizes organic pollutants from fly ash matrix through low-temperature thermal decomposition reaction under anoxic or anoxic atmosphere, for example, dioxins will undergo a series of complex physical and chemical changes, such as desorption, dechlorination and degradation, oxidative ring-opening decomposition, chlorination reaction, de novo synthesis and precursor synthesis, and the removal efficiency of dioxins can reach 99%. However, thermal desorption may cause dioxin resynthesis, so the fly ash low-temperature pyrolysis desorption device provided in the embodiment can only be used as pretreatment of fly ash disposal. Subsequent treatment can utilize vacuum pyrolysis technology to efficiently digest and detoxify toxic organic matters such as dioxins and furans, prevent dioxin resynthesis, and remove volatile heavy metals (such as mercury) and volatile organic matters in fly ash in the form of thermal desorption.

[0057] Compared with the high-temperature calcination process, the pyrolysis desorption device provided in the embodiment utilizes a heat treatment process, the energy consumption is low, the operation cost is greatly saved, and the pollutant emission is reduced. Through pyrolysis desorption and subsequent treatment of fly ash, low-cost filling, non-burning bricks, breakwaters and roadbed materials and the like can be realized, and complete harmless and resourceful disposal of fly ash can be realized.

[0058] Specifically, in the embodiment, the feeding bin comprises a first gear ring 1121, a supporting plate 1122, a first motor 1123, a driving gear 1124, a permanent magnet 1125, a movable iron plate 1126 and a material cleaning assembly 1127. The first gear ring is arranged around the outer wall of the feeding bin, and the driving gear and the first gear ring are meshed with each other. The first motor is connected with the driving gear through a connecting rod and drives the driving gear to move. The permanent magnet is fixedly installed on the side surface of the connecting rod, the bottom of the permanent magnet is provided with the supporting plate, and the supporting plate is provided with an inwardly inclined baffle for stabilizing the permanent magnet during movement.

[0059] The movable iron plate is installed in the annular groove of the inner wall of the feeding bin, and the bottom of the movable iron plate is provided with a first roller 11262 which is embedded in the slide rail at the bottom of the annular groove. The center of the movable iron plate 1126 is provided with a U-shaped groove 11261 which just accommodates the ash removal assembly 1127.

[0060] The ash removal assembly comprises a second roller 11271 and an arc-shaped scraper. The second roller is embedded in the U-shaped groove and drives the arc-shaped scraper to remove the fly ash in the feeding bin along with the movement of the movable iron plate.

[0061] The pyrolysis desorption mechanism comprises a second motor 123, a chain 122 and a pyrolysis desorption cylinder 121. The second motor is located at the first end of the pyrolysis desorption cylinder, and the pyrolysis desorption cylinder is provided with a second gear ring 1221. The second gear ring and the second motor are connected through the chain. The second motor rotates to drive the pyrolysis desorption cylinder to rotate. The discharge port of the pyrolysis desorption mechanism is arranged at the second end of the pyrolysis desorption cylinder.

[0062] The outer side of the pyrolysis desorption cylinder is provided with a heating furnace 1211 which is used for heating the pyrolysis desorption cylinder to realize pyrolysis desorption.

[0063] The center of the pyrolysis desorption cylinder is provided with an ash and slag cleaning assembly 124 which comprises a first telescopic rod 1241, a second telescopic rod 1242, a third telescopic rod 1243 and a hydraulic pump 1246 as a main body. Each telescopic rod is provided with a supporting rod 1244 as a branch body, and the supporting rod is provided with a thread 12441. The thread 12441 cooperates with the internal thread at the bottom of the arc-shaped scraper 1245 to realize the installation of the arc-shaped scraper 1245 and facilitate the replacement. The hydraulic pump is suspendedly installed at the feeding port of the pyrolysis desorption cylinder without blocking the fly ash from the feeding pipeline into the pyrolysis desorption cylinder. The hydraulic pump drives the arc-shaped scraper on the supporting rod to break and clean the fly ash scaling on the inner wall of the cylinder through the directional telescopic movement of the telescopic rod by the change of the hydraulic oil pressure.

[0064] In this embodiment, the discharge port of the pyrolysis desorption cylinder is provided with a discharge cover to prevent dust caused by discharging. Meanwhile, a rotary valve is installed at the discharge port of the pyrolysis desorption cylinder to control the discharging speed.

[0065] The tail gas treatment mechanism is connected with the pyrolysis desorption cylinder through the exhaust pipeline, and a layer of heat preservation material is wrapped around the tail gas pipeline to prevent the high-temperature tail gas heat radiation from causing harm to the human body.

[0066] The tail gas treatment mechanism comprises a filtering system, a vacuum pump and a forced condensing system, the filtering system filters high-temperature flue gas, and the forced condensing system condenses and collects the drawn gas to perform subsequent treatment.

[0067] The above-described embodiments are only a preferred scheme of the present application, and do not limit the present application in any form, and other variants and modifications are possible without exceeding the technical scheme recorded in the claims.

Claims

1. A fly ash low temperature pyrolysis desorption apparatus, characterized by, Including mutually connected feed mechanism and pyrolysis desorption mechanism, the feed mechanism includes feed bin, the outer wall of the feed bin is provided with driving device, driving device is provided with permanent magnet, the inner wall of the feed bin is provided with movable iron plate, movable iron plate is provided with cleaning assembly inside;The pyrolysis desorption mechanism includes pyrolysis desorption cylinder, the inside of the pyrolysis desorption cylinder is provided with ash cleaning assembly, and the outer side of the pyrolysis desorption cylinder is connected with rotating device at the feed inlet end.

2. The fly ash low-temperature pyrolysis desorption device according to claim 1, characterized in that, The driving device includes a gear ring arranged around the outer wall of the feed bin and a driving gear engaged with the gear ring, the driving gear is connected with a motor through a connecting rod, and the permanent magnet is installed on the side surface of the connecting rod.

3. The fly ash low temperature pyrolysis desorption device according to claim 1, characterized in that, The ash cleaning assembly includes a hydraulic pump, the hydraulic pump is connected with a telescopic mechanism, the telescopic mechanism is provided with a support rod, the top end of the support rod is provided with a circular arc-shaped spade, and the circular arc-shaped spade abuts against the inner wall of the pyrolysis desorption cylinder.

4. The fly ash low temperature pyrolytic desorption device according to claim 3, characterized in that, The telescopic mechanism includes a first telescopic rod connected with the hydraulic pump, the first telescopic rod is connected with a second telescopic rod, the second telescopic rod is connected with a third telescopic rod, the first telescopic rod, the second telescopic rod and the third telescopic rod are all installed with support rods, and the support rods are cross-installed.

5. The fly ash low temperature pyrolytic desorption device according to claim 2, characterized in that, The cleaning assembly includes a first roller and an arc-shaped scraper, the first roller is installed on the movable iron plate, the arc-shaped scraper is installed on the roller, and the arc-shaped scraper abuts against the inner wall of the feed bin.

6. The fly ash low-temperature pyrolysis desorption device according to claim 2 or 5, characterized in that, The inner wall of the feed bin is provided with an annular groove, the bottom of the annular groove is provided with a slide rail, the bottom of the movable iron plate is provided with a second roller, and the second roller is embedded in the slide rail.

7. The fly ash low-temperature pyrolysis desorption device according to claim 2 or 5, characterized in that, The movable iron plate is provided with a U-shaped groove, and the cleaning assembly is installed in the U-shaped groove.

8. The fly ash low-temperature pyrolysis desorption device according to claim 1 or 2, characterized in that, The bottom of the permanent magnet is installed with a support plate, and the support plate is installed with a baffle.

9. A device for thermal desorption of fly ash at low temperature according to any one of claims 1 to 5, characterized in that, It also includes a tail gas treatment device, and the tail gas treatment device is connected with the pyrolysis desorption cylinder through an exhaust pipeline.

10. A device for thermal desorption of fly ash at low temperature according to any one of claims 1 to 5, characterized in that The outer wall of the pyrolysis desorption cylinder is provided with a heating furnace, the discharge port of the pyrolysis desorption cylinder is provided with a discharge cover, and the discharge port is installed with a rotary valve.

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