Hazardous waste fly ash molding treatment system

Abstract

The utility model provides a hazardous waste fly ash molding treatment system, and relates to the field of hazardous waste fly ash molding treatment. Comprising a first electric gate valve, a quantitative material pipe assembly, a second electric gate valve, a spiral conveying machine, a vertical double-spiral conveying machine, a humidifier, a first storage hopper, a pneumatic mixer, a first hose spiral conveying machine, a hydraulic molding machine, a horizontal grid screen, a second hose spiral conveying machine, a large-dip-angle belt conveying machine, a finished product tank and a molding mold cavity. According to the utility model, the first quantitative material pipe and the second quantitative material pipe are matched with the first electric gate valve and the second electric gate valve, so that materials in the ash tank and the powder tank are accurately controlled, and the quantity of the materials treated each time is predetermined, so that the treatment accuracy and efficiency are improved; therefore, efficient treatment of the hazardous waste fly ash is achieved, high automation and flexibility are achieved, and the material uniformity and the finished product quality in the treatment process can be guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of hazardous waste fly ash plastic treatment, specifically a hazardous waste fly ash plastic treatment system. Background Technology

[0002] Among numerous waste treatment technologies, waste incineration has become the mainstream choice for municipal solid waste treatment due to its ability to achieve thorough harmless treatment, significant volume reduction, and potential energy recovery advantages. Among these technologies, grate waste incinerators are widely used due to their high-efficiency incineration capacity. Hazardous waste fly ash plasticizing treatment is an innovative treatment method for hazardous waste incineration fly ash, and it is part of the medium-temperature remelting FAST process.

[0003] However, incinerators generate a large amount of hazardous fly ash during waste processing. Grate-fired waste incinerators produce approximately 3-4% hazardous fly ash, while fluidized bed incinerators produce approximately 11%. Current mainstream technologies for treating waste incineration fly ash include solidification / stabilization + landfill, water washing and desalination, high-temperature heat treatment, high-temperature synergistic heat treatment, and low-temperature (desorption) decomposition of dioxins. However, these technologies all have the following problems:

[0004] First, there is a shortage of landfill capacity after stabilization;

[0005] Secondly, secondary pollution may occur during the treatment process, such as the re-release of harmful substances like dioxins;

[0006] Third, some processes have high energy consumption, which does not meet the requirements of green and sustainable development;

[0007] Fourth, some processes are inefficient and cannot meet the needs of large-scale hazardous waste fly ash treatment.

[0008] Fifth, the processed products have limited utilization value and are difficult to utilize as resources.

[0009] In summary, this utility model provides a hazardous waste fly ash plastic molding treatment system to solve the above problems. Utility Model Content

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0011] A hazardous waste fly ash molding and processing system includes a first electric gate valve, a metering pipe assembly, a second electric gate valve, a screw conveyor, a vertical double screw conveyor, a humidifier, a first storage hopper, a pneumatic mixer, a first flexible screw conveyor, a hydraulic molding machine, a horizontal screen, a second flexible screw conveyor, a steep-angle belt conveyor, a finished product tank, and a molding cavity. The system also includes an ash tank and a powder tank. The pneumatic mixer consists of an air compressor, an air storage tank, and a mixer body. The hydraulic molding machine consists of a hydraulic station, a molding cavity, and a horizontal screen. The metering tube assembly includes a first metering tube and a second metering tube. The first metering tube is installed at the lower end of the ash hopper, and the second metering tube is installed at the lower end of the powder hopper. A first electric slide gate valve and a second electric slide gate valve are installed on the surface of both the first and second metering tubes. The humidifier is installed at the outlet of the vertical twin-screw conveyor. The first storage hopper is installed at the upper end of the pneumatic mixer. The first flexible hose screw conveyor is installed between the pneumatic mixer and the hydraulic molding machine. The outlet of the large-angle belt conveyor is connected to the inlet of the finished product tank.

[0012] Furthermore, in this utility model, a second storage hopper is installed at the upper end of the hydraulic molding machine, the outlet of the first hose screw conveyor is connected to the second storage hopper, and the second storage hopper is connected to the hydraulic molding machine.

[0013] Furthermore, in this utility model, the outlet of the finished product tank is connected to a first electric unloading valve, the outlet of the first storage hopper is connected to a second electric unloading valve, and the outlet of the pneumatic mixer is connected to a third electric unloading valve.

[0014] Furthermore, in this utility model, the inlet of the hydraulic molding machine is connected to a third electric slide valve, and the horizontal screen is located below the outlet of the hydraulic molding machine.

[0015] Furthermore, in this utility model, the first electric slide gate valve and the second electric slide gate valve are located at the upper and lower ends of the metering pipe assembly, respectively, and the steep-angle belt conveyor is used to transport finished product granules.

[0016] Furthermore, in this utility model, the hydraulic molding machine adopts a straight-line design with upper and lower oil cylinders facing each other.

[0017] Beneficial effects: This utility model has the following beneficial effects:

[0018] This invention achieves precise control of materials in ash hoppers and powder hoppers through a first and second metering pipe, in conjunction with a first and second electric slide gate valve. This ensures that the amount of material processed each time is predetermined, thereby improving the accuracy and efficiency of the process. The use of screw conveyors, vertical double screw conveyors, flexible screw conveyors, and steep-angle belt conveyors enables automatic and continuous material transport between various stages, reducing manual intervention and improving the system's automation level. Through the control of electrical components such as electric unloading valves and electric slide gate valves, precise control of the entire processing process can be achieved, including material mixing, humidification, molding, conveying, and storage. This enables efficient treatment of hazardous waste fly ash, providing not only high automation and flexibility but also ensuring material uniformity and finished product quality during the processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hazardous waste fly ash plastic molding treatment process of this utility model;

[0020] Figure 2 This is a schematic diagram of the framework of the hazardous waste fly ash plastic molding treatment system of this utility model;

[0021] Figure 3 This is a top view cross-sectional structural diagram of the present invention.

[0022] In the picture:

[0023] 1. First electric slide gate valve; 2. Metering pipe assembly; 21. First metering pipe; 22. Second metering pipe; 3. Second electric slide gate valve; 4. Screw conveyor; 5. Vertical double screw conveyor; 6. Humidifier; 7. First storage hopper; 8. Pneumatic mixer; 9. First hose screw conveyor; 10. Second storage hopper; 11. Hydraulic molding machine; 12. Horizontal grid screen; 13. Second hose screw conveyor; 14. Large angle belt conveyor; 15. Finished product tank; 16. First electric unloading valve; 17. Second electric unloading valve; 18. Third electric unloading valve; 19. Third electric slide gate valve; 20. Molding cavity. Detailed Implementation

[0024] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0025] Example 1

[0026] like Figure 1-3 As shown, this is the first embodiment of the present invention. This embodiment provides a hazardous waste fly ash molding and processing system, including a first electric slide gate valve 1, a quantitative feed pipe assembly 2, a second electric slide gate valve 3, a screw conveyor 4, a vertical double screw conveyor 5, a humidifier 6, a first storage hopper 7, a pneumatic mixer 8, a first flexible hose screw conveyor 9, a hydraulic molding machine 11, a horizontal grid screen 12, a second flexible hose screw conveyor 13, a large-angle belt conveyor 14, a finished product tank 15, and a molding cavity 20. The processing system also includes an ash tank and a powder tank. The pneumatic mixer 8 consists of an air compressor, an air storage tank, and a mixer body. The hydraulic molding machine 11 consists of a hydraulic station, a molding die, and a powder container. The mold cavity 20 and the horizontal grid screen 12 are composed of a quantitative material tube assembly 2, which includes a first quantitative material tube 21 and a second quantitative material tube 22. The first quantitative material tube 21 is installed at the lower end of the ash tank, and the second quantitative material tube 22 is installed at the lower end of the powder tank. The surfaces of the first quantitative material tube 21 and the second quantitative material tube 22 are equipped with a first electric slide valve 1 and a second electric slide valve 3. The humidifier 6 is installed at the outlet of the vertical double screw conveyor 5. The first storage hopper 7 is installed at the upper end of the pneumatic mixer 8. The first hose screw conveyor 9 is installed between the pneumatic mixer 8 and the hydraulic molding machine 11. The outlet of the large-angle belt conveyor 14 is connected to the inlet of the finished product tank 15.

[0027] like Figure 1-3As shown, the first electric slide gate valve 1 and the second electric slide gate valve 3 are respectively installed at the upper and lower ends of the metering pipe assembly 2, which can control the outflow of materials in the ash hopper and powder hopper to achieve metered feeding. The metering pipe assembly 2 can ensure that the ash and powder added each time are metered, improving the accuracy and consistency of mixing. The screw conveyor 4 and the vertical double screw conveyor 5 are used to transport the metered materials to the subsequent processing stage. The vertical double screw conveyor 5 is responsible for lifting the materials to a higher position. The humidifier 6 is used to humidify the materials to improve the plasticity and mixing effect of the materials. The first storage hopper 7 is used to temporarily store materials and provide a continuous material supply to the pneumatic mixer 8 and the hydraulic molding machine 11. The pneumatic mixer 8 is powered by an air compressor. Composed of a gas storage tank and a mixer body, it thoroughly mixes ash and powder to ensure material uniformity. The first flexible screw conveyor 9 transports the mixed material to the hydraulic molding machine 11 for finished product processing. The horizontal grid screen 12 can perform preliminary screening and separation of the molded finished product. The finished product can be transported to the finished product tank 15 by the steep-angle belt conveyor 14. The material in the finished product tank 15 can be remotely transported to the waste incinerator for incineration and heat treatment. During the heat treatment process, the dioxins remaining in the product can be further burned at high temperature, thereby achieving efficient treatment of hazardous waste fly ash. It not only has a high degree of automation and flexibility, but also ensures the uniformity of materials and the quality of finished products during the processing.

[0028] Example 2

[0029] Reference Figure 1-3 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0030] In this embodiment, a second storage hopper 10 is installed at the upper end of the hydraulic molding machine 11, the outlet of the first hose screw conveyor 9 is connected to the second storage hopper 10, and the second storage hopper 10 is connected to the hydraulic molding machine 11.

[0031] The outlet of the finished product tank 15 is connected to a first electric unloading valve 16, the outlet of the first storage hopper 7 is connected to a second electric unloading valve 17, and the outlet of the pneumatic mixer 8 is connected to a third electric unloading valve 18.

[0032] The inlet of the hydraulic molding machine 11 is connected to a third electric slide gate valve 19, and the horizontal screen 12 is located below the outlet of the hydraulic molding machine 11.

[0033] The first electric slide gate valve 1 and the second electric slide gate valve 3 are located at the upper and lower ends of the metering pipe assembly 2, respectively, and the steep-angle belt conveyor 14 is used to convey the finished product granules.

[0034] The hydraulic molding machine 11 adopts a straight-line design with upper and lower oil cylinders facing each other, and the molding cavity 20 can be designed as round, square or elliptical, with the external dimensions controlled within 60mm×50mm.

[0035] like Figure 1-3 As shown, the mixed material enters the hydraulic molding machine 11 through the second storage hopper 10. The hydraulic molding machine 11 adopts a straight design with upper and lower cylinders facing each other, which can stably and powerfully mold the material. The material is pressed into a finished product of a specific shape in the molding cavity 20. The size of the molding cavity 20 can be adjusted according to actual needs. The molded finished product is initially screened and separated by a horizontal screen 12, and then falls onto a steep-angle belt conveyor 14. The material separated by the horizontal screen 12 is conveyed by a second flexible screw conveyor 14. 3. The material is conveyed to the second storage hopper 10 and then re-enters the hydraulic molding machine 11 for molding. The inclined belt conveyor 14 conveys the finished product to the finished product tank 15 for storage or further processing. A third electric slide gate valve 19 is installed at the inlet of the hydraulic molding machine 11 to further control the entry of materials and the start and end of the molding process. The first electric discharge valve 16, the second electric discharge valve 17 and the third electric discharge valve 18 are respectively installed at the outlets of the finished product tank 15, the storage hopper and the pneumatic mixer 8 to control the outflow of materials.

[0036] In operation, first close the first electric slide gate valve 1 to convey the hazardous waste fly ash and powder into the ash hopper and powder hopper respectively. Then close the second electric slide gate valve 3 and start the first electric slide gate valve 1 to allow the hazardous waste fly ash and powder to enter the first metering pipe 21 and the second metering pipe 22 respectively, filling the metering pipes with hazardous waste fly ash and powder. Next, open the second electric slide gate valve 3 to allow the hazardous waste fly ash and powder to automatically enter the screw conveyor 4. When the material in the metering pipe is discharged, close the second electric slide gate valve 3. The first electric gate valve 1 is activated by valve 3, and the mixture in the screw conveyor 4 is conveyed into the vertical double screw conveyor 5. The mixture automatically enters the first storage hopper 7. The outlet of the vertical double screw conveyor 5 is equipped with a humidifier 6. When the mixture enters the first storage hopper 7, the humidifier 6 is activated to humidify the mixture. Then, the second electric discharge valve 17 is activated, and the humidified material enters the pneumatic mixer 8 for stirring. Before stirring, the third electric discharge valve 18 is closed, and the mixture is stirred until 9. After 0 seconds, the third electric unloading valve 18 below the mixing tank is activated. The mixed material enters the first flexible screw conveyor 9, which transports the mixed material to the second storage hopper 10 of the hydraulic molding machine 11. After the hydraulic molding machine 11 completes the molding, it is automatically transported to the horizontal screen 12. A small particle material collection box is provided below the horizontal screen 12. The small particle material enters the second flexible screw conveyor 13 and is transported to the second storage hopper 10 of the hydraulic molding machine 11 for re-molding. The finished particles above the horizontal screen 12 enter the steep-angle belt conveyor 14, which transports the finished material to the finished product tank 15. The material in the finished product tank 15 can be remotely transported to the waste incinerator for incineration heat treatment. The agent contains a combustion agent. During the heat treatment process, the dioxins remaining inside the product can be further burned at high temperature. If the product is molded from water-washed ash, the humidifier 6 does not need to be turned on. The molded finished product needs to be dried before entering the boiler for processing to prevent the high-moisture molded product from absorbing a large amount of heat in the furnace after entering the boiler.

[0037] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0038] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A hazardous waste fly ash molding and processing system, comprising a first electric gate valve (1), a quantitative feed pipe assembly (2), a second electric gate valve (3), a screw conveyor (4), a vertical double screw conveyor (5), a humidifier (6), a first storage hopper (7), a pneumatic mixer (8), a first flexible hose screw conveyor (9), a hydraulic molding machine (11), a horizontal grid screen (12), a second flexible hose screw conveyor (13), a steep-angle belt conveyor (14), a finished product tank (15), and a molding cavity (20), characterized in that: Its processing system also includes an ash hopper and a powder hopper. The pneumatic mixer (8) consists of an air compressor, an air tank, and a mixer body. The hydraulic molding machine (11) consists of a hydraulic station, a molding cavity (20), and a horizontal grid screen (12). The metering pipe assembly (2) includes a first metering pipe (21) and a second metering pipe (22). The first metering pipe (21) is installed at the lower end of the ash hopper, and the second metering pipe (22) is installed at the lower end of the powder hopper. The surfaces of the first metering pipe (21) and the second metering pipe (22) are each equipped with a first electric slide gate valve (1) and a second electric slide gate valve (3). The humidifier (6) is installed at the outlet of the vertical double helix conveyor (5), the first storage hopper (7) is installed at the upper end of the pneumatic mixer (8), the first hose screw conveyor (9) is installed between the pneumatic mixer (8) and the hydraulic molding machine (11), the outlet of the large-angle belt conveyor (14) is connected to the inlet of the finished product tank (15), the (2) is connected to the feed port of the screw conveyor (4), the discharge port of the screw conveyor (4) is connected to the inlet of the vertical double helix conveyor (5), and the outlet of the vertical double helix conveyor (5) is connected to the inlet of the first storage hopper (7).

2. The hazardous waste fly ash plastic forming treatment system as described in claim 1, characterized in that: The upper end of the hydraulic molding machine (11) is equipped with a second storage hopper (10), the outlet of the first hose screw conveyor (9) is connected to the second storage hopper (10), and the second storage hopper (10) is connected to the hydraulic molding machine (11).

3. The hazardous waste fly ash plastic forming treatment system as described in claim 1, characterized in that: The outlet of the finished product tank (15) is connected to a first electric unloading valve (16), the outlet of the first storage hopper (7) is connected to a second electric unloading valve (17), and the outlet of the pneumatic mixer (8) is connected to a third electric unloading valve (18).

4. The hazardous waste fly ash plastic forming treatment system as described in claim 1, characterized in that: The inlet of the hydraulic molding machine (11) is connected to a third electric slide gate valve (19), and the horizontal screen (12) is located below the outlet of the hydraulic molding machine (11).

5. The hazardous waste fly ash plastic forming treatment system as described in claim 1, characterized in that: The first electric slide gate valve (1) and the second electric slide gate valve (3) are located at the upper and lower ends of the metering pipe assembly (2), respectively, and the large-angle belt conveyor (14) is used to convey finished particles.

6. The hazardous waste fly ash plastic forming treatment system as described in claim 1, characterized in that: The hydraulic molding machine (11) adopts a straight-line design with upper and lower oil cylinders facing each other.

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