Centralized conveying and storing device for hazardous waste incineration fly ash

Abstract

The utility model relates to the technical field of fly ash collection and treatment, in particular to a centralized conveying and storing device for hazardous waste incineration fly ash, which comprises a conveying mechanism, a collecting mechanism and an output treatment mechanism, the three mechanisms are seamlessly connected, and the conveying mechanism comprises a scraper ash conveyor and a bucket elevator. A feeding port of the scraper ash conveyor is connected with a bag-type dust collector, the collecting mechanism comprises a fly ash storage bin and a support, a dust removal component, a pressure relief valve and a first level gage are arranged at the top of the bin, a hardening prevention component, a second level gage and a discharging pipe are arranged at the bottom of the bin, and a storage bin ash discharging valve is arranged in the middle of the discharging pipe. The output processing mechanism comprises a backflow device and a spiral ash conveying machine which are both fixed to the support, the input end of the spiral ash conveying machine is connected to the output end of the discharging pipe, the input end of the backflow device is suspended and located on one side of the output end of the spiral ash conveying machine, and the output end of the backflow device is connected with the top of the fly ash storage bin. The utility model is used for solving the problem of centralized transportation, storage and transfer of fly ash.

Description

Technical Field

[0001] This utility model relates to the field of fly ash collection and treatment technology, specifically to a centralized conveying and storage device for fly ash from hazardous waste incineration. Background Technology

[0002] Existing hazardous waste incineration produces a large amount of fly ash. After the flue gas is treated by a dry desulfurization tower, the acidic gases in the flue gas are neutralized, and then the fly ash is collected. Fly ash collection is usually carried out by dust removal equipment, such as bag filters, in which the fly ash is captured and separated from the flue gas.

[0003] Currently, fly ash is collected and transported manually via filter bags for centralized storage. Because baghouse dust collectors have numerous collection points and require frequent manual bag replacement, the process is labor-intensive and prone to fly ash leakage, posing significant occupational health risks to operators and causing secondary environmental pollution. Traditional fly ash transportation and storage methods also pose a risk of clogging transportation and storage equipment, hindering subsequent loading, transportation, and reuse.

[0004] Therefore, in order to solve the defects in the existing fly ash collection, storage and transportation, there is an urgent need for a more efficient, safe and automated centralized transportation and storage device for hazardous waste incineration fly ash. Utility Model Content

[0005] The present invention aims to provide a centralized conveying and storage device for fly ash from hazardous waste incineration, in order to solve the problems of easy blockage in the existing fly ash transportation and storage methods, which are not conducive to subsequent loading, transportation and reuse.

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

[0007] A centralized conveying and storage device for hazardous waste incineration fly ash includes a transport mechanism, a collection mechanism, and an output processing mechanism. The transport mechanism includes a scraper conveyor and a bucket elevator. The feed inlet of the scraper conveyor is connected to a bag filter, and the discharge outlet is seamlessly connected to the feed inlet at the bottom of the bucket elevator. The top discharge outlet of the bucket elevator is equipped with a chute seamlessly connected to the input outlet of the collection mechanism. The collection mechanism includes a fly ash storage bin and a support frame. The top of the fly ash storage bin is equipped with a dust removal component, a pressure relief valve, and a first level gauge. The bottom of the fly ash storage bin is equipped with an anti-caking component, a second level gauge, and a discharge pipe. An ash discharge valve for the storage bin is located in the middle of the discharge pipe. The output processing mechanism includes a reflux device and a screw conveyor. Both the screw conveyor and the reflux device are fixed on the support frame. The input end of the screw conveyor is connected to the output end of the discharge pipe, and the input end of the reflux device is located on one side of the output end of the screw conveyor. The output end of the reflux device is connected to the top of the fly ash storage bin.

[0008] The principle and advantages of this scheme are:

[0009] Existing hazardous waste incineration processes generate large amounts of fly ash. After the flue gas passes through a dry desulfurization tower, the acidic gases in the flue gas are neutralized. The fly ash is then collected by a bag filter, relying on manual operation for collection and transportation. Because the bag filter has numerous collection points and requires frequent manual bag replacement, fly ash leaks are prone to occur during this process, posing significant occupational health risks to the environment and operators, and causing secondary pollution.

[0010] Traditional treatment methods are inefficient, dangerous, and outdated. This solution, considering both worker safety and environmental protection, designs a highly automated centralized conveying and storage device for hazardous waste incineration fly ash. Fly ash is directly conveyed from a bag filter into the feed inlet of the conveying mechanism, then transported by a scraper conveyor to a bucket elevator, and finally conveyed through a chute into the fly ash storage silo for collection. Dust is generated during the flow of ash into the silo; therefore, a dust collection system is installed at the top of the silo. A pressure relief valve is provided to automatically regulate the pressure within the silo.

[0011] The internal fly ash storage volume is monitored by first and second level gauges installed at the top and bottom of the fly ash storage silo. When the limit is reached, the fly ash is output and transferred. The bottom of the fly ash storage silo collection mechanism is equipped with an anti-clogging device to prevent fly ash from caking and clogging. The ash discharge valve at the bottom of the fly ash storage silo is opened, and the fly ash is conveyed to the screw conveyor. Since fly ash is a solid powder, it cannot flow out of the pipe like a liquid. Therefore, the screw conveyor is needed to make the fly ash flow. The screw shaft driven by the motor conveys the fly ash to the discharge port and falls down, completing the rapid output and transfer of fly ash. At the same time, a return device is installed on one side of the output end of the screw conveyor. The return device sucks the dust from the output end of the screw conveyor back into the fly ash storage silo, eliminating occupational hazards caused by fly ash at the source and further preventing environmental pollution caused by fly ash dust.

[0012] Because the transport mechanism and input device are seamlessly connected, leakage during transportation is avoided, preventing environmental pollution and endangering the personal safety of operators. The introduction of automated equipment has improved the processing efficiency of fly ash transportation and storage, solving the problems of easy blockage in existing fly ash transportation and storage methods, which are not conducive to subsequent loading, transportation, and reuse.

[0013] Preferably, as an improvement, a third level gauge and speed sensor are provided at the bottom inside the bucket elevator.

[0014] Because fly ash has the characteristic of accumulating, it accumulates at the bottom of the bucket elevator pipe during the process of being transported from the scraper conveyor to the bucket elevator. Therefore, it is necessary to install a third level gauge at the bottom to detect the ash accumulation and clean it in time. A speed sensor should also be installed to sense the chain speed of the bucket elevator to prevent fly ash from spilling out due to excessive speed. An alarm signal should be issued in time when the chain suddenly stops running.

[0015] Preferably, as an improvement, the bucket elevator is equipped with an external electric heating device.

[0016] An external electric heating device is installed to maintain a suitable temperature for the bucket elevator and prevent the fly ash inside from caking.

[0017] Preferably, as an improvement, the anti-caking device includes a fluidizer located inside the cone section of the fly ash storage bin and an external electric heating device and a vibrator.

[0018] If fly ash is stored for too long, it will cake and stick to the side wall of the fly ash storage silo, making it impossible to release the fly ash. To avoid this, a heating device is installed at the bottom of the fly ash storage silo to heat it. A vibrator is used to vibrate the fly ash storage silo at a certain frequency to prevent fly ash caking. Fluidizers are arranged at multiple points inside the cone part of the fly ash storage silo to assist in the output of fly ash, increase its fluidity, prevent bridging, and allow the material to be discharged smoothly.

[0019] Preferably, as an improvement, the ash discharge valve of the storage bin includes a manual slide gate valve and an ash discharge valve.

[0020] Since fly ash is a solid powder, the valves may become stuck and fail after prolonged use due to dust accumulation. Therefore, two valves are installed as a double safety measure. The manual slide gate valve is durable and very stable, and the lower part uses an ash discharge valve for quick ash discharge. If one valve fails and requires maintenance, the other valve can be closed to complete the maintenance, which is very convenient.

[0021] Preferably, as an improvement, the reflux device includes a reflux fan and a reflux duct. The reflux fan is fixed on a support, the input end of the reflux fan is located on one side of the output end of the screw conveyor, the output end of the reflux fan is connected to the input end of the reflux duct, and the output end of the reflux duct is connected to the top of the fly ash storage bin.

[0022] When fly ash leaves the output end of the screw conveyor, it will generate dust. The dust will be completely absorbed by the input end of the return fan located on one side of the output end of the screw conveyor, and then transported to the fly ash storage bin through the return air duct, which further avoids the pollution of the environment caused by fly ash dust.

[0023] Preferably, as an improvement, the fly ash storage bin is provided with external support ears, and a weighing module is provided on the support frame, with the lower part of the support ears resting on the weighing module.

[0024] Since fly ash is in powder form and some of it is suspended or floating in the air, the amount of fly ash stored cannot be accurately determined by the second and third level gauges when the amount of fly ash is too small. Therefore, by introducing a weighing module, which works in conjunction with the second and third level gauges to determine the amount of fly ash stored, the measurement becomes more accurate and efficient. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the centralized conveying and storage device for hazardous waste incineration fly ash according to Embodiment 1 of this utility model.

[0026] Figure 2 This is a side view of the overall structure of the centralized conveying and storage device for hazardous waste incineration fly ash according to Embodiment 1 of this utility model.

[0027] Figure 3 This is a schematic diagram of the fly ash storage bin and the layout of various mechanisms in Embodiment 1 of this utility model. Detailed Implementation

[0028] The following detailed description illustrates the specific implementation method:

[0029] The reference numerals in the accompanying drawings of the instruction manual include: scraper conveyor 1, bucket elevator 2, third level gauge 201, chute 3, fly ash storage bin 4, first level gauge 401, dust removal component 402, weighing module 403, pressure relief valve 404, second level gauge 405, lug 406, bracket 407, anti-caking device 5, vibrator 501, electric heating device 502, fluidizer 503, storage bin ash discharge valve 6, discharge pipe 601, ash discharge valve 602, manual slide gate valve 603, screw conveyor 7, reflux device 8, reflux fan 801, reflux duct 802.

[0030] Example 1 is basically as shown in the attached document. Figure 1-3 As shown:

[0031] As attached Figure 1 , 2 As shown, a centralized conveying and storage device for hazardous waste incineration fly ash includes a transport mechanism, a collection mechanism, and an output processing mechanism. The transport mechanism includes a scraper conveyor 1 and a bucket elevator 2. The inlet of the scraper conveyor 1 is directly connected to a bag filter dust collector, reducing the intermediate process of manual operation and making it safer and more efficient. The outlet end of the scraper conveyor 1 is seamlessly connected to the inlet at the bottom of the bucket elevator 2, as shown in the attached diagram. Figure 1The enlarged view shows that the bottom of the bucket elevator 2 is equipped with a third level gauge 201 and a speed sensor. The third level gauge 201 determines whether there is ash accumulation at the bottom of the bucket elevator 2, and the speed sensor senses the chain speed of the bucket elevator 2 to prevent excessive speed from causing fly ash to spill out. An alarm signal is issued promptly when the chain suddenly stops operating. An electric heating device is installed on the outside of the bucket elevator 2 to keep the fly ash in a stable powder state. The top discharge port of the bucket elevator 2 is equipped with a chute 3 that is seamlessly connected to the input port of the collection mechanism.

[0032] As attached Figure 3 The collection mechanism shown includes a fly ash storage bin 4. A dust removal component 402, a pressure relief valve 404, and a first level gauge 401 are installed at the top of the fly ash storage bin 4. When fly ash enters the fly ash storage bin 4 from the chute 3, it generates dust. Therefore, a dust removal component 402 is installed at the top of the fly ash storage bin 4. In this embodiment, a negative pressure dust collector is used. Because the fly ash storage bin 4 is in a sealed state, when fly ash is continuously transferred into the fly ash storage bin 4, the space is compressed, and the increased pressure poses a safety hazard of explosion. Therefore, the pressure relief valve 404 is installed to regulate and balance the pressure. The fly ash storage silo 4 is equipped with a first level gauge 401 at the top and a second level gauge 405 at the bottom inside. The fly ash storage silo 4 is externally equipped with lugs 406 and a support 407. A weighing module 403, a load cell, is mounted on the support 407. The lugs 406 are supported on the weighing module 403. The amount of fly ash stored inside is determined by the combination of the first level gauge 401, the second level gauge 405, and the weighing module 403. The bottom of the fly ash storage silo 4 is equipped with an anti-caking component, which effectively prevents clogging. This component includes a fluidizer 503 located inside the conical section of the fly ash storage silo 4 and an external electric heating device 502 and a vibrator 501. The fly ash storage bin 4 is vibrated at a certain frequency by a vibrator to prevent fly ash from sticking to the bin wall. The fly ash storage bin 4 is heated by an electric heating device 502 so that some of the caking fly ash is restored to a more fluid powder under vibration. The fluidizers 503 arranged at multiple points inside the cone part of the fly ash storage bin 4 further enhance the fluidity and avoid the problem of fly ash caking and blockage.

[0033] The fly ash storage silo 4 has a discharge pipe at its bottom outlet, and a silo discharge valve 6 is located in the middle of the discharge pipe. The silo discharge valve 6 includes a manual slide gate valve 603 and a discharge valve 602. In actual use, the valve may become stuck due to dust and fail. If there is only one valve, it will be troublesome to replace and maintain. Setting two valves effectively solves this problem and also serves as a double insurance to prevent fly ash leakage.

[0034] The lower part of the discharge pipe 601 is connected to the output processing mechanism, which includes a reflux device 8 and a screw conveyor 7. Both the screw conveyor 7 and the reflux device 8 are fixed on the support. The input end of the screw conveyor 7 is connected to the output end of the discharge pipe 601. The reflux device 8 includes a reflux fan 801 and a reflux duct 802. The input end of the reflux fan 801 is suspended and located on one side of the output end of the screw conveyor 7. The input end of the reflux duct 802 is connected to the reflux fan 801, and the output end of the reflux duct 802 is connected to the top of the fly ash storage bin 4. Since fly ash is a solid powder and cannot flow out of the pipe like a liquid, the screw conveyor 7 is needed to make the fly ash flow. The screw is driven by a motor and conveyed to the discharge port. During the fall of the fly ash, dust will be generated. The reflux fan 801 sucks the dust into the reflux duct 802 and transports it into the fly ash storage bin 4, which can prevent dust pollution.

[0035] The specific implementation method is as follows:

[0036] As attached Figure 1 As shown, fly ash in the bag filter dust collector is conveyed into the scraper conveyor 1 from the right inlet and then into the bucket elevator 2 from the left outlet. The bucket elevator 2 transports the fly ash to the top, where it enters the fly ash storage silo 4 through the chute 3 connected to the top of the bucket elevator 2. The dust removal component 402 at the top of the fly ash storage silo 4 is activated. After accumulation, the second level gauge 405 at the bottom of the fly ash storage silo 4 is triggered. In case of abnormal pressure during storage, the pressure relief valve 404 automatically opens to regulate the pressure inside the silo. When the weighing module 403 indicates that the limit has been reached, the operator activates the electric heating device 502 and the vibrator 501 on the outside of the bottom of the fly ash storage silo 4. The vibrator 501 vibrates the bottom of the fly ash storage silo 4 at a fixed frequency. When fly ash continues to accumulate and triggers the first level gauge 401 located at the top of the fly ash storage silo 4, the operator starts the return fan 801 and the screw conveyor 7, opens the manual gate valve 603 and the discharge valve 602, and the fly ash enters the screw conveyor 7. The fly ash is then conveyed to the discharge port and falls into the transport vehicle. The return fan 801 draws the fly ash dust generated during the discharge process into the return duct 802 and transports it into the fly ash storage silo 4, preventing personal injury and environmental pollution. When the level gauge 401 and weighing module 403 at the bottom of the fly ash storage silo 4 indicate that there is no fly ash accumulation inside, the operator shuts down the machine.

[0037] During the transportation and storage of fly ash, fly ash accumulates at the bottom of the bucket elevator 2, forming ash deposits. When the ash deposits reach a limit, the third level gauge 201 at the bottom of the bucket elevator 2 is triggered. After the operator learns that the ash deposits have reached the limit, the ash deposits are processed after the machine stops operating.

[0038] This solution features seamless connections between the conveying device, collection mechanism, and output processing mechanism, eliminating secondary leakage and pollution problems during transportation and storage. The anti-caking components and internal fluidizer on the collection mechanism solve the problem of fly ash caking and blockage. The organic integration of these devices addresses the issues of easy blockage during fly ash transportation and storage in existing technologies, which hinders subsequent loading, transportation, and reuse. Furthermore, the automated system improves processing efficiency, significantly reduces the workload of operators, and eliminates occupational hazards caused by direct contact with fly ash.

[0039] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A centralized conveying and storage device for fly ash from hazardous waste incineration, characterized in that: The system includes a transport mechanism, a collection mechanism, and an output processing mechanism. The transport mechanism includes a scraper conveyor and a bucket elevator. The scraper conveyor's inlet is connected to a bag filter, and its outlet is seamlessly connected to the inlet at the bottom of the bucket elevator. The bucket elevator's outlet is equipped with a chute seamlessly connected to the inlet of the collection mechanism. The collection mechanism includes a fly ash storage bin and a support frame. The top of the fly ash storage bin is equipped with a dust removal component, a pressure relief valve, and a first level gauge. The bottom of the fly ash storage bin is equipped with an anti-caking component, a second level gauge, and a discharge pipe. The discharge pipe has a storage bin ash discharge valve in the middle. The output processing mechanism includes a reflux device and a screw conveyor. Both the screw conveyor and the reflux device are fixed on the support frame. The input end of the screw conveyor is connected to the output end of the discharge pipe. The input end of the reflux device is suspended and located on one side of the output end of the screw conveyor. The output end of the reflux device is connected to the top of the fly ash storage bin.

2. The centralized conveying and storage device for fly ash from hazardous waste incineration according to claim 1, characterized in that: The bottom of the bucket elevator is equipped with a third level gauge and a speed sensor.

3. A centralized conveying and storage device for fly ash from hazardous waste incineration according to claim 2, characterized in that: The bucket elevator is equipped with an external electric heating device.

4. A centralized conveying and storage device for fly ash from hazardous waste incineration according to claim 3, characterized in that: The anti-caking component includes a fluidizer installed inside the cone-shaped part of the fly ash storage bin and an external electric heating device and vibrator.

5. A centralized conveying and storage device for fly ash from hazardous waste incineration according to claim 4, characterized in that: The ash discharge valve of the storage bin includes a manual slide gate valve and an ash discharge valve.

6. A centralized conveying and storage device for fly ash from hazardous waste incineration according to claim 5, characterized in that: The reflux device includes a reflux fan and a reflux duct. The reflux fan is fixed on the support. The input end of the reflux fan is located on one side of the output end of the screw conveyor. The output end of the reflux fan is connected to the input end of the reflux duct. The output end of the reflux duct is connected to the top of the fly ash storage bin.

7. A centralized conveying and storage device for fly ash from hazardous waste incineration according to any one of claims 1-6, characterized in that: The fly ash storage bin is equipped with external lugs, and a weighing module is mounted on the support frame, with the lower part of the lugs resting on the weighing module.

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