Coal cinder filter pressing system

Abstract

The utility model discloses a coal cinder filter pressing system which comprises a cinder water settling tank, the plate-and-frame filter press is communicated with the slag water settling tank and is used for carrying out filter-pressing water removal on the water-containing coal slag; and the feeding tank is arranged between the slag water settling tank and the plate-and-frame filter press and is used for caching the water-containing coal slag to be subjected to filter pressing and ensuring continuous slag water settling. The coal cinder filter pressing system solves the problem that the existing coal cinder filter pressing system is high in moisture content after solid-liquid separation and is not beneficial to effective utilization of resources. According to the scheme, the plate-and-frame filter press is used for dehydration treatment, and compared with an existing vacuum filter, the water content of waste residues after final treatment is lower, blending combustion use of coal cinder is facilitated, and the resource utilization rate is increased. In order to be matched with the use of the plate-and-frame filter press, the feed chute is arranged between the slag water settling tank and the plate-and-frame filter press, and the feed chute performs certain buffering, so that the time vacancy of the settling treatment process and the filter pressing treatment process can be made up, and the continuous operation of the whole filter pressing system is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coal slag dewatering technology, specifically to a coal slag filter press system. Background Technology

[0002] To conserve resources, the fine slag filtered by the slag water filter is often pumped to the boiler for co-firing. Currently, factories often use vacuum filters to separate solids and liquids from slag water. The principle of a vacuum filter is to use vacuum negative pressure (usually in the range of 0.04-0.07MPa) as the driving force to make the liquid in the suspension pass through the filter medium (such as filter cloth) and be drawn away, while the solid particles are trapped by the medium, thereby achieving the separation of liquid and solid.

[0003] However, the fine slag filtered by the slag water filter contains about 65% moisture. The high moisture content of the coal slag causes a certain amount of heat loss during boiler operation, increases energy consumption, and is not conducive to the effective utilization of resources. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing coal slag filter press system has a high moisture content after solid-liquid separation, which is not conducive to the effective utilization of resources. The purpose is to provide a coal slag filter press system to solve the problem of high moisture content after solid-liquid separation in the existing coal slag filter press system, which is not conducive to the effective utilization of resources.

[0005] This utility model is achieved through the following technical solution:

[0006] A coal slag filter press system, comprising:

[0007] Sludge settling tank;

[0008] Plate and frame filter press, connected to slag and water settling tank, is used for dewatering water-containing coal slag by pressure filtration;

[0009] The feed trough is located between the slag and water settling tank and the plate and frame filter press to buffer the water-containing coal slag to be filtered and to ensure the continuous settling of the slag and water.

[0010] As one of the preferred technical solutions, the plate and frame filter press includes:

[0011] The machine base has thrust plates and clamping plates on both sides;

[0012] The filtration mechanism includes multiple diaphragm filter plates arranged in sequence, with each diaphragm filter plate located between the thrust plate and the clamping plate;

[0013] The hydraulic system, connected to the pressure plate, is used to push the pressure plate to press or release the filter plate.

[0014] The plate-pulling mechanism is used to drive multiple filter plates to move and pull them apart sequentially for unloading.

[0015] As one of the preferred technical solutions, one end of the diaphragm filter plate is connected to a pressing pipe, with the outlet of the pressing pipe facing the diaphragm filter plate, for air or water intake to further press or clean the diaphragm filter plate.

[0016] As one of the preferred technical solutions, the base is provided with a flip-plate mechanism located directly below the filtration mechanism.

[0017] As one of the preferred technical solutions, a first connecting pipe connects the feed trough and the slag-water settling tank; a second connecting pipe connects the feed trough and the plate and frame filter press.

[0018] As one of the preferred technical solutions, the first connecting pipe is equipped with an underflow pump and a gate valve.

[0019] As one of the preferred technical solutions, the second connecting pipe is located at the bottom of the feed trough, and a feed pump is connected to the second connecting pipe.

[0020] As one of the preferred technical solutions, both the first connecting pipe and the second connecting pipe include a seamless steel pipe and a right-angle elbow that are smoothly connected.

[0021] As one of the preferred technical solutions, the bottom of the feed pump is connected with anchor bolts.

[0022] As one of the preferred technical solutions, a stirrer is provided inside the feed trough.

[0023] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0024] 1. This solution utilizes a plate and frame filter press for dewatering. Compared to the use of existing vacuum filters, the final treated waste residue has a lower moisture content, which is beneficial for the co-firing of coal slag and improves resource utilization.

[0025] 2. To facilitate the use of the plate and frame filter press, a feed trough is set between the sludge settling tank and the plate and frame filter press. The feed trough has a certain buffering capacity, which can make up for the time gap between the settling process and the filter press process, and ensure the continuous operation of the entire filter press system. Attached Figure Description

[0026] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention and constitute a part of this application, do not constitute a limitation on the embodiments of the present invention. The structures, proportions, sizes, etc., depicted in the accompanying drawings are solely for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in this technical disclosure, and are not intended to limit the implementation conditions of this application. Therefore, they do not have substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and purposes achieved by this application, should still fall within the scope of the technical content disclosed in this application.

[0027] In the attached diagram:

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of the feed pump of this utility model;

[0030] Figure 3 This is a schematic diagram of the plate and frame filter press of this utility model.

[0031] The attached diagram shows the markings and corresponding component names:

[0032] 1-Slag and water settling tank; 2-Plate and frame filter press; 21-Base; 22-Thrust plate; 23-Pressure plate; 24-Filtration mechanism; 25-Hydraulic system; 26-Plate pulling mechanism; 3-Feed trough; 4-Pressing pipe; 5-Flipping mechanism; 6-First connecting pipe; 7-Second connecting pipe; 8-Anchor bolt; 9-Agitator; 10-Underflow pump; 11-Gate valve; 12-Feed pump. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0034] In the description of this document, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] This embodiment provides a coal slag filter press system, such as Figures 1-3 As shown, it includes:

[0036] Slag and water settling tank 1; Specifically, after the wastewater enters the slag and water settling tank 1, it begins to settle, and finally the fine slag settles to the bottom of the slag and water settling tank 1 for preliminary solid-liquid separation.

[0037] Plate and frame filter press 2 is connected to slag and water settling tank 1 and is used to filter and remove water from water-containing coal slag. Specifically, in this embodiment, plate and frame filter press 2 is selected. Compared with the existing technology of using vacuum filter for solid-liquid separation, the final coal slag has less water content after pressing, which is more conducive to the subsequent co-firing of coal slag.

[0038] Feed trough 3 is located between slag-water settling tank 1 and plate and frame filter press 2 to buffer the water-containing coal slag to be filtered and ensure continuous slag-water settling. It is known that both the settling process and the plate and frame filter press process are intermittent operations and require a certain amount of time to complete. To address the time gap between the two processes, this solution includes a feed trough 3 between the plate and frame filter press 2 and the slag-water settling tank 1. The settled water-containing waste slag enters the feed trough 3 for temporary storage, while the wastewater in the feed trough 3 enters the plate and frame filter press 2 for dewatering and solid-liquid separation.

[0039] The specific working process of this embodiment is as follows: after the water-containing fine slag settles in the slag-water settling tank 1, it is sent to the feed tank 3. The feed pump 12 at the bottom of the feed tank 3 sends the water-containing fine slag into the plate and frame filter press 2. After the plate and frame filter press 2 is filled with feed, the filter press is started to start pressing. The pressed fine slag is automatically unloaded and falls to the ground, and is collected by a loader and fed into the boiler for co-firing, thereby achieving the comprehensive benefits of reducing boiler consumption and reusing the calorific value of gasified fine slag.

[0040] Furthermore, a first connecting pipe 6 connects the feed trough 3 to the slag-water settling tank 1; a second connecting pipe 7 connects the feed trough 3 to the plate and frame filter press 2. Specifically, an underflow pump 10 and a gate valve 11 are installed on the first connecting pipe 6; the second connecting pipe 7 is located at the bottom of the feed trough 3 and is connected to a feed pump 12. Both the underflow pump 10 and the feed pump 12 are used to transport water-containing waste slag.

[0041] Furthermore, both the first connecting pipe 6 and the second connecting pipe 7 include seamless steel pipes and right-angle elbows that are smoothly connected. Specifically, the number of seamless steel pipes and right-angle elbows is determined by the specific actual scenario. By splicing seamless steel pipes and right-angle elbows, normal communication between the feed trough 3 and the slag and water settling tank 1, and between the feed trough 3 and the plate and frame filter press 2 is ensured.

[0042] Furthermore, such as Figure 2 As shown, the bottom of the feed pump 12 is connected to anchor bolts 8. The main function of the anchor bolts 8 is to firmly connect the equipment to the concrete foundation, ensuring the stability and safety of the equipment.

[0043] Furthermore, an agitator 9 is installed inside the feed trough 3. The agitator 9 stirs to ensure that the water-containing waste residue is mixed evenly, thereby preventing the water-containing waste residue from settling at the bottom of the feed trough 3 and causing blockage; in addition, by stirring, the water-containing waste residue can completely leave the feed trough 3 for pressing and dewatering in the plate and frame filter press 2.

[0044] Furthermore, such as Figure 3 As shown, the plate and frame filter press 2 includes:

[0045] The machine base 21 has thrust plates 22 and clamping plates 23 on both sides;

[0046] The filtration mechanism 24 includes multiple diaphragm filter plates arranged in sequence, all of which are located between the thrust plate 22 and the clamping plate 23. At the start of filtration, the slurry is pushed by the feed pump 12 and enters each filter chamber through the mud inlet of the thrust plate 22. The slurry undergoes solid-liquid separation with the help of the pressure generated by the feed pump. Due to the action of the filter medium (filter cloth), the solids remain in the filter chamber to form a filter cake, and the filtrate is discharged from the drain port.

[0047] The hydraulic system 25, connected to the pressure plate 23, is used to push the pressure plate 23 to press or loosen to squeeze the filter plates. The hydraulic system 25 includes a hydraulic cylinder and a hydraulic station. The hydraulic station converts mechanical energy into hydraulic energy to drive the hydraulic cylinder. The telescopic end of the hydraulic cylinder is connected to the pressure plate 23. When the equipment is working, the piston rod on the hydraulic cylinder pushes the pressure plate 23 to press the filter plates and filter cloth located between the pressure plate 23 and the thrust plate 22 to ensure that the pressurized slurry is pressurized and filtered in the filter chamber. The filtered filtrate is discharged through the pipeline.

[0048] The plate-pulling mechanism 26 is used to drive multiple filter plates to move and pull them apart sequentially for unloading. Specifically, the plate-pulling mechanism 26 includes a plate puller slidably arranged on the base. After filtration is completed, unloading begins. The clamping plate 23 is released and the first group of filter plates is pulled apart sequentially. The plate puller moves, and the second group of filter plates is pulled apart by the plate-pulling mechanism 26 of the plate puller, and then the third group, until all filter plates are pulled apart.

[0049] Furthermore, one end of the diaphragm filter plate is connected to a pressing pipe 4, with the outlet of the pressing pipe 4 facing the diaphragm filter plate. This pipe is used for air or water intake to further press or clean the diaphragm filter plate. It is understood that the diaphragm filter plate includes a pressing chamber and diaphragm sheets. When clean water or gas enters the pressing main pipe (not shown in the figure) via a high-pressure pressing pump, the pressing main pipe enters the pressing chamber of each diaphragm filter plate through each pressing pipe 4, pushing the diaphragm sheets outward and mechanically squeezing the filter cake to further reduce its moisture content, resulting in a filter cake with extremely low moisture content.

[0050] Furthermore, a flap mechanism 5 is provided on the base 21, located directly below the filtration mechanism 24. To prevent filtrate and filter cloth washing water from flowing into the filter cake, conveyor, sludge hopper, etc., the flap mechanism is a device that uses the extension and retraction of a hydraulic cylinder to open the flap before the sludge cake is discharged and close it after the sludge cake is discharged. Specifically, the flap mechanism 5 includes two symmetrically arranged flaps, which rotate synchronously driven by a motor.

[0051] Specifically, the working process of this utility model is as follows:

[0052] Wastewater enters the slag settling tank 1 for settling. The water-containing waste residue after settling is pressurized by the underflow pump 10 and transported to the feed tank 3 through the first connecting pipe 6. The agitator 9 in the feed tank 3 fully stirs the water-containing waste residue to achieve uniform mixing. After being pressurized by the feed pump 12, it enters the plate and frame filter press 2, thus allowing the water-containing waste residue to enter the filtration chamber.

[0053] At the start of filtration, the slurry, driven by the feed pump 12, enters each filter chamber through the slurry inlet of the thrust plate 22. The slurry undergoes solid-liquid separation under the pressure generated by the feed pump. Due to the action of the filter medium (filter cloth), the solids remain in the filter chamber to form a filter cake, while the filtrate is discharged through the drain port. The hydraulic system 25 extends and retracts to push the pressing plate 23 to press the diaphragm filter plates. Additionally, clean water or gas enters the pressing manifold (not shown in the figure) via a high-pressure pressing pump. The pressing manifold then enters the pressing chamber of each diaphragm filter plate through each pressing pipe 4, pushing the diaphragm plates outward and mechanically squeezing the filter cake to further reduce its moisture content, resulting in a filter cake with extremely low moisture content.

[0054] Opening the flip-plate mechanism 5 allows the pressed fine residue to be automatically unloaded and fall to the ground, where it is collected by a loader and fed into the boiler for co-firing, thereby achieving the comprehensive benefits of reducing boiler consumption and reusing the calorific value of the gasified fine residue.

[0055] In the description of this document, some terms may be used to indicate not only orientation or positional relationship, but also other meanings. For example, the term "above" may also be used in some cases to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0056] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A coal slag filter press system, characterized in that, include: Sludge settling tank; Plate and frame filter press, connected to slag and water settling tank, is used for dewatering water-containing coal slag by pressure filtration; The feed trough is located between the slag and water settling tank and the plate and frame filter press to buffer the water-containing coal slag to be filtered and to ensure the continuous settling of the slag and water.

2. The slag filter press system according to claim 1, characterized in that, The plate and frame filter press includes: The machine base has thrust plates and clamping plates on both sides; The filtration mechanism includes multiple diaphragm filter plates arranged in sequence, with each diaphragm filter plate located between the thrust plate and the clamping plate; The hydraulic system, connected to the pressure plate, is used to push the pressure plate to press or release the filter plate. The plate-pulling mechanism is used to drive multiple filter plates to move and pull them apart sequentially for unloading.

3. The coal slag filter press system according to claim 2, characterized in that, One end of the diaphragm filter plate is connected to a pressing pipe, with the outlet of the pressing pipe facing the diaphragm filter plate, for air or water intake to further press or clean the diaphragm filter plate.

4. The slag filter press system according to claim 2, characterized in that, The base is equipped with a flip-plate mechanism located directly below the filtration mechanism.

5. The coal slag filter press system according to claim 1, characterized in that, A first connecting pipe connects the feed trough to the slag and water settling tank; a second connecting pipe connects the feed trough to the plate and frame filter press.

6. The slag filter press system according to claim 5, characterized in that, The first connecting pipe is equipped with an underflow pump and a gate valve.

7. The coal slag filter press system according to claim 5, characterized in that, The second connecting pipe is located at the bottom of the feed trough, and a feed pump is connected to the second connecting pipe.

8. The slag filter press system according to any one of claims 5-7, characterized in that, Both the first connecting pipe and the second connecting pipe include a seamless steel pipe and a right-angle elbow that are smoothly connected.

9. The slag filter press system according to claim 7, characterized in that, The bottom of the feed pump is connected to anchor bolts.

10. The coal slag filter press system according to claim 1, characterized in that, An agitator is installed inside the feed trough.

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