Batching system of edge runner mill for fly ash treatment

Abstract

The utility model relates to the field of tools for fly ash treatment, in particular to a batching system of an edge runner for fly ash treatment, which specifically comprises an edge runner body, the edge runner body is provided with an edge runner cylinder, an edge runner cylinder cover and an edge runner device in the edge runner cylinder, the cylinder cover is buckled on the cylinder when in use, and the edge runner cylinder cover is buckled on the edge runner device when in use. The utility model discloses an edge runner which comprises an edge runner body to form an inner cavity of the edge runner, a feed port is arranged on the side wall of the edge runner body, and a feeding platform is arranged on the lower edge of the feed port, and is characterized in that a conveying belt conveyor is arranged at the feed port, the belt conveyor is provided with a belt head part and a belt tail part, and the belt head part is arranged on the feeding platform and conveys materials to the inner cavity of the edge runner from the feed port; the batching system of the edge runner mill has the advantage of convenience and accuracy in batching.

Description

Technical Field

[0001] This utility model relates to the field of wheel mills, specifically to a batching system for a special wheel mill used in the treatment of fly ash generated from waste incineration, for mixing wet sludge and dry powder. Background Technology

[0002] Waste-to-energy incineration is currently the main form of waste treatment. Waste incineration produces a certain amount of fly ash (3-8% of the waste weight), which contains heavy metals and dioxins, classifying it as hazardous solid waste and requiring thorough treatment. Current methods for treating fly ash include chelating agent treatment followed by landfilling, water washing combined with cement kiln co-processing, and high-temperature molten state treatment for fly ash resource utilization. These methods have various drawbacks. For example, chelating agent treatment followed by landfilling requires a large amount of land; water washing combined with cement kiln co-processing handles only a small amount of fly ash, making large-scale treatment difficult; and high-temperature molten state treatment for fly ash resource utilization requires significant energy investment, resulting in high input and low output.

[0003] The applicant has developed a wet method for treating fly ash: using fly ash as the main component, coal gangue and waste glass as auxiliary materials, along with water, dry clay powder and trace additives, and through processes such as homogenization, mechanical grinding, dehydration, mud mixing, molding, and sintering, the fly ash is prepared into a gray ceramic material that can be used as an industrial additive. This method not only achieves the harmless treatment of fly ash but also enables its resource utilization, and the finished product has high economic benefits. It represents the direction for the harmless and resource-based utilization of fly ash.

[0004] To prepare fly ash into different industrial additives (such as ceramic fiber additives, asbestos fiber additives, soft magnetic additives, etc.), the composition of the product after fly ash treatment needs to be stable and consistent. However, due to the random changes in the composition of waste, the composition of fly ash after incineration also changes randomly. During the fly ash treatment process, different trace additives of different components must be added according to the different fly ash components and mixed evenly to ensure that the final product composition is stable and consistent.

[0005] In the aforementioned pre-treatment process for wet fly ash, a large amount of fly ash needs to be divided into several units for processing. The fly ash in the same unit has a basically the same composition after homogenization, while the composition of fly ash in different units may not be the same. Roller mill mixing (sludge mixing), as the final treatment process for fly ash-treated sludge, requires the formulation of a mixing formula based on the composition and moisture content of the sludge cake produced by the preceding dewatering process, determining the amount of dry powder and trace additives to be added. Sludge mixing is carried out in a roller mill. Existing roller mills lack accurate metering settings for wet sludge and dry powder; therefore, a new roller mill needs to be designed to meet this requirement. Summary of the Invention

[0006] The purpose of this invention is to provide a roller mill with precise quantitative control of various materials during the mixing of wet mud and dry powder after fly ash dewatering in wet treatment. The specific solution of this invention is as follows:

[0007] A feeding system for a roller mill for fly ash treatment includes a roller mill body, the roller mill body having a roller mill cylinder and a roller mill cylinder cover, and a roller milling device inside the roller mill cylinder. The cylinder cover is fastened to the cylinder body during use to form the inner cavity of the roller mill. A feed inlet is provided on the side wall of the roller mill body, and a feeding platform is installed at the lower edge of the feed inlet. The system is characterized in that a conveyor belt is installed at the feed inlet, the conveyor belt having a belt head and a belt tail. The belt head is installed on the feeding platform and conveys material from the feed inlet into the inner cavity of the roller mill.

[0008] A dry powder storage hopper and a screw conveyor are installed next to the roller mill cylinder. The dry powder storage hopper includes a dry powder hopper body and a dry powder discharge pipe at the lower end of the dry powder hopper body. A receiving hopper is provided on the side of the screw conveyor close to the dry powder storage hopper. The dry powder discharge pipe is equipped with a gate and is divided into upper and lower sections by the gate. The upper section is welded to the conical wall of the dry powder storage hopper, and the lower section is inserted into the receiving hopper. The other side of the screw conveyor has a conveyor discharge pipe, which is connected to the inner cavity of the roller mill through a cylinder cover. A second gate is provided on the conveyor discharge pipe.

[0009] A trace additive feeding hole is provided on the roller mill cylinder. The feeding hole is connected to a trace additive feeding device, which is fixed to the roller mill cylinder by a connecting plate. The trace additive feeding device consists of a feeding cylinder and a feeding piston. The lower end of the feeding cylinder is connected to a blowing pipe, which is fixed and passes into the trace additive feeding hole. The feeding piston can be pulled out and inserted into the feeding cylinder, which can store trace additives.

[0010] Furthermore, a bypass screw conveyor discharge pipe is connected next to the screw conveyor discharge pipe, and the screw conveyor is connected to the PLC through a control gate.

[0011] Furthermore, an electronic belt scale is installed under the belt before the end of the belt conveyor. The electronic belt scale can weigh the mud cake that is fed into the inner cavity of the roller mill via the conveyor belt online. A PLC is also provided, which can receive data from the electronic belt scale and control the operation of the belt conveyor.

[0012] Furthermore, the belt head is flush with the side wall of the roller mill at the feed inlet.

[0013] The beneficial effects of this invention are: such a roller mill can quantitatively deliver wet mud, dry powder and trace additives into the cylinder, and the delivery amount is accurate. It is also equipped with PLC automatic control, which can automatically control the amount added, accurately measure and automatically control the stop, saving manpower. Attached Figure Description

[0014] Figure 1 This is a front view of the batching system of the roller mill;

[0015] Figure 2 This is the main view of the batching system of the roller mill (the belt conveyor is omitted, and the feed inlet is shown).

[0016] Figure 3 This is a top view of the batching system of the roller mill;

[0017] Figure 4 yes Figure 1 Enlarged diagram of point A in the diagram;

[0018] Figure 5 yes Figure 1 Enlarged diagram of point B in the diagram;

[0019] Figure 6 yes Figure 1 CC cross-section of the micro-additive feeding device.

[0020] The components include: 1. Cylinder; 2. Cylinder cover; 3. Inner cavity of the roller mill; 4. Feed inlet; 5. Feeding platform; 6. Belt conveyor; 61. Belt head; 62. Belt tail; 7. Electronic belt scale; 8. Dry powder storage hopper; 81. Dry powder hopper body; 82. Dry powder discharge pipe; 83. Gate plate one; 9. Screw conveyor; 91. Receiving hopper; 93. Conveyor discharge pipe; 94. Gate plate two; 95. Adjustment discharge pipe; 96. Adjustment gate plate; 10. Micro-additive feeding device; 11. Connecting plate; 12. Feeding cylinder; 13. Feeding piston; 14. Blowing pipe. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the embodiments.

[0022] like Figure 1-5As shown, a feeding system for a roller mill for fly ash treatment includes a roller mill body, which has a roller mill cylinder 1 and a roller mill cylinder cover 2, as well as a roller mill device inside the roller mill cylinder. When in use, the cylinder cover is fastened to the cylinder to form an inner cavity 3 of the roller mill. A feed inlet 4 is provided on the side wall of the roller mill body (the feed inlet can be installed on the side wall of the cylinder or on the side wall of the cylinder cover; in this embodiment, the feed inlet is installed on the side wall of the cylinder cover). A feeding platform 5 is installed at the lower edge of the feed inlet. The system is characterized in that a conveyor belt 6 is installed at the feed inlet. The conveyor belt has a belt head 61 and a belt tail 62. The belt head is installed on the feeding platform 5 and conveys material to the inner cavity of the roller mill from the feed inlet 4.

[0023] A dry powder storage hopper 8 and a screw conveyor 9 are installed next to the roller mill cylinder. The dry powder storage hopper includes a dry powder hopper body 81 and a dry powder discharge pipe 82 at the lower end of the dry powder hopper body. A receiving hopper 91 is provided on the side of the screw conveyor close to the dry powder storage hopper. A gate 83 is provided on the dry powder discharge pipe 82 and it is divided into upper and lower sections by the gate 83. The upper section is welded to the conical wall of the dry powder storage hopper 8, and the lower section is inserted into the receiving hopper 91. The other side of the screw conveyor has a conveyor discharge pipe 93. The conveyor discharge pipe is connected to the inner cavity 3 of the roller mill through the cylinder cover 2. A gate 94 is provided on the conveyor discharge pipe.

[0024] A trace additive feeding hole is provided on the roller mill cylinder. The feeding hole is connected to a trace additive feeding device 10. The trace additive feeding device is fixed to the roller mill cylinder by a connecting plate 11. The trace additive feeding device consists of a feeding cylinder 12 and a feeding piston 13. A blowing pipe 14 is connected to the lower end of the feeding cylinder. The blowing pipe is fixed and passes into the trace additive feeding hole. The feeding piston 13 can be pulled out and inserted into the feeding cylinder 12. The feeding cylinder can store trace additives.

[0025] Instructions for use: Calculate the weight of mud cake loaded into the roller mill in one operation based on the batching process and the nominal output value of the roller mill. Manually test the moisture content of the mud cake with a moisture meter. Calculate the amount of dry powder to be added based on the weight and moisture content of the mud cake, and calculate the amount of trace additives to be added based on the composition and weight of the mud cake.

[0026] The roller mill is started, the mud cake is weighed and fed into the inner cavity 3 of the roller mill via belt conveyor 6. After the mud cake is fed, the belt conveyor is stopped. After the belt conveyor has fed the mud cake into the roller mill, the screw conveyor 9 is started. The screw rotates and the gate 1 83 and gate 2 94 are opened. The dry powder is fed into the screw conveyor 9 through the dry powder discharge pipe 82 and the receiving hopper 91. The dry powder is pushed to the upper end by the rotating screw in the screw conveyor, and then enters the roller mill through the conveyor discharge pipe 93, gate 2 94, and roller mill cover 2. Then the feed piston of the trace additive feeding device is pulled out. The trace additive is weighed with a balance and poured into the feed cylinder 12 and stored in the cone inside the feed cylinder 12. The feed piston 13 is pulled into the cavity of the feed cylinder 12 and quickly pressed down to the bottom. The trace additive is sprayed into the inner cavity of the roller mill under the air jet in the cavity of the feed cylinder. This can disperse the trace additive over a relatively large area, which facilitates the uniform mixing of the trace additive into the mud.

[0027] In this way, mud cake, dry powder, and trace additives can be added to the inner cavity of the roller mill separately through belt conveyor, screw conveyor, and trace additive feeding device. After feeding, the mixture is mixed for the specified time to produce mud with stable composition and moisture content, which meets the needs of subsequent molding processes.

[0028] To elaborate further, such as Figure 1 An electronic belt scale 7 is installed under the belt before the end of the belt conveyor. The electronic belt scale can weigh the mud cake that is sent into the inner cavity of the roller mill via the conveyor belt online. It is also equipped with a PLC, which can receive data from the electronic belt scale and control the operation of the belt conveyor.

[0029] This setup allows the PLC to input the required mud cake mass data. The electronic belt scale transmits the mud cake mass data fed into the roller mill cavity to the PLC in real time. Once the required mass is reached, the PLC controls the belt conveyor to stop running. This enables automated, quantitative mud cake addition without manual weighing, making it more convenient.

[0030] To elaborate further, such as Figure 5 A bypass screw conveyor discharge pipe 95 is connected next to the conveyor discharge pipe 93 of the screw conveyor 9, and is controlled by the adjustment gate 96. The screw conveyor 9 is also connected to the PLC.

[0031] This allows for PLC control of the added dry powder quality. The specific principle is as follows: Since the diameter of the material cylinder and the screw of the screw conveyor are fixed, and the screw pitch is constant, the amount of dry powder output per revolution of the screw is also fixed. Measuring the number of screw revolutions determines the weight of the output dry powder. Start the screw feeder, close gate 2 94, and open the quantitative adjustment gate 96. Open gate 1 83 and start timing simultaneously. Dry powder enters the screw conveyor 9 from the dry powder discharge pipe 82 via the receiving hopper 91, and is output from the adjustment discharge pipe 95 at the upper end via the adjustment gate 96. A container is used to collect the dry powder output from the adjustment discharge pipe 95. Timing is 30 seconds. After 30 seconds, gate 1 83 is closed. After all the dry powder has been output from the adjustment discharge pipe 95, the dry powder weight is measured. The dry powder flow rate is obtained by dividing the dry powder weight by the time (30 seconds). Based on the weight of the dry powder to be added and the measured dry powder flow rate, the dry powder feeding time is calculated. Then, the feeding time is written into the PLC to control the screw conveyor feeding.

[0032] This allows for automatic control of the feed rate of the screw conveyor via PLC, making it convenient to use.

[0033] Furthermore, the belt head is flush with the side wall at the feed inlet, such as... Figure 1 The dashed line F in the diagram is shown.

[0034] This is to prevent the belt head from extending excessively into the inner cavity of the roller mill, which could interfere with the operation of the internal roller mill device.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A feeding system for a roller mill for fly ash treatment, comprising a roller mill body, the roller mill body having a roller mill cylinder and a roller mill cylinder cover, and a roller milling device inside the roller mill cylinder, wherein the cylinder cover is fastened to the cylinder body during use to form the inner cavity of the roller mill, a feed inlet is provided on the side wall of the roller mill body, and a feeding platform is installed along the lower edge of the feed inlet, characterized in that: A conveyor belt is installed at the feed inlet. The conveyor belt has a belt head and a belt tail. The belt head is installed on the feeding platform and conveys material from the feed inlet into the inner cavity of the roller mill. A dry powder storage hopper and a screw conveyor are installed next to the roller mill cylinder. The dry powder storage hopper includes a dry powder hopper body and a dry powder discharge pipe at the lower end of the dry powder hopper body. A receiving hopper is provided on the side of the screw conveyor close to the dry powder storage hopper. The dry powder discharge pipe is equipped with a gate and is divided into upper and lower sections by the gate. The upper section is welded to the conical wall of the dry powder storage hopper, and the lower section is inserted into the receiving hopper. The other side of the screw conveyor has a conveyor discharge pipe, which is connected to the inner cavity of the roller mill through a cylinder cover. A second gate is provided on the conveyor discharge pipe. A trace additive feeding hole is provided on the roller mill cylinder. The feeding hole is connected to a trace additive feeding device, which is fixed to the roller mill cylinder by a connecting plate. The trace additive feeding device consists of a feeding cylinder and a feeding piston. The lower end of the feeding cylinder is connected to a blowing pipe, which is fixed and passes into the trace additive feeding hole. The feeding piston can be pulled out and inserted into the feeding cylinder, which can store trace additives.

2. The batching system for a roller mill for fly ash treatment according to claim 1, characterized in that: in A bypass screw conveyor discharge pipe is connected to the discharge pipe of the screw conveyor, and is controlled by a gate valve. The screw conveyor is connected to the PLC.

3. The batching system for a roller mill for fly ash treatment according to claim 2, characterized in that: An electronic belt scale is installed under the belt before the end of the belt conveyor. The electronic belt scale can weigh the mud cake that is fed into the inner cavity of the roller mill via the conveyor belt online. A PLC is also provided. The PLC can receive the data from the electronic belt scale and control the operation of the belt conveyor.

4. The batching system for a roller mill for fly ash treatment according to claim 1, 2, or 3, characterized in that: The belt head is flush with the side wall of the roller mill at the feed inlet.

Images