Filter belt oil removal device for belt filter press

Abstract

A belt filter filter belt oil removal device belongs to the technical field of sewage treatment. The device comprises a concentration device, a filter pressing device, a cleaning liquid supply device, a control cabinet, a centrifugal booster pump and a spraying device; the spraying device is installed on the side where the wedge-shaped area is located, and the spraying device comprises a first spraying pipe and a second spraying pipe, which respectively spray the upper filter belt and the lower filter belt of the wedge-shaped area. The blended oil removal agent is sprayed onto the surface of the filter belt through the pressure regulating structure, and through the cooperation of the oil removal agent and the high-pressure spraying, the oil on the surface of the filter belt is fully dissolved, and then the filter belt is fully cleaned by using clean water for rinsing. The device can effectively remove the sludge and other substances dried in the filter belt mesh, effectively improve the water permeability of the filter belt, further reduce the water content of the sludge, and ensure the dewatering quality. Under the premise of improving the efficiency, the water content of the sludge is reached.

Description

Technical Field

[0001] This utility model relates to an oil removal device for a belt filter press, which belongs to the technical field of wastewater treatment. Background Technology

[0002] Wastewater treatment plants often use belt filter presses (also known as dewatering machines or belt dewatering machines) to dewater wastewater, primarily to reduce the moisture content of sludge. The entire dewatering process of a belt filter press is continuous, and its operation is as follows: flocculation—feeding—material distribution—gravity dewatering in the thickening section—discharging from the thickening section—gravity dewatering in the filter press section—pre-compression dewatering in the filter press section—pressing dewatering in the filter press section—discharging. After flocculation, the suspended material effectively loses most of its free water in the thickening section under gravity, gradually concentrating the material. It is then fed to the filter press section via a filter cake discharge mechanism. After gravity dewatering, the material is tumbled and discharged between the upper and lower filter belts, where it undergoes pre-compression dewatering in a wedge-shaped zone. When the material is pressed by a pair of main dewatering rollers, it enters a series of S-shaped pressure rollers with decreasing diameters until discharge. This subjectes the filter cake to increasing squeezing and shearing forces, removing most of the free water and some capillary water from the material.

[0003] Under current technology, if the sludge contains residual grease or other oils, water washing cannot effectively clean the filter belt, and the rinsing effect is not ideal. After a period of time, the oil will form a film on the mesh of the filter cloth, affecting the filtration and dewatering function, and causing the moisture content of the material processed by the belt filter press to increase. The moisture content of sludge is relatively strictly controlled. If the treatment requirements cannot be met, the treatment efficiency will be affected. Summary of the Invention

[0004] To overcome the shortcomings of existing belt filter presses, which cannot effectively clean the filter cloth, resulting in excessively high water content in the treated sludge and low wastewater treatment efficiency, this utility model provides a belt filter press oil removal device. The mixed oil removal agent is sprayed onto the surface of the filter belt through a pressure regulating structure. The combination of the oil removal agent and high-pressure spraying fully dissolves the grease on the surface of the filter belt. Afterward, the filter belt is rinsed with clean water to complete the thorough cleaning.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a belt filter press oil removal device, including a concentration device, a filter press device, a cleaning liquid supply device, a control cabinet, a centrifugal booster pump, and a spraying device. The filter press device includes a wedge-shaped area and S-shaped arranged pressure rollers. The wedge-shaped area is formed by the upper filter belt between the first tension roller and the main dewatering roller and the lower filter belt between the second tension roller and the main dewatering roller. The cleaning liquid supply device includes a storage tank, a level gauge, a supply valve, and a discharge valve. The centrifugal booster pump... The pipeline is connected to the cleaning fluid supply device and the spray device; the spray device is installed on the side where the wedge-shaped area is located, and the spray device includes a first spray pipe and a second spray pipe, with spray holes set on the main body of the spray pipe; the first spray pipe is installed in the space enclosed by the upper filter belt running around the first tension roller, and is parallel to the first tension roller; the second spray pipe is installed in the space enclosed by the lower filter belt running around the second tension roller, and is parallel to the second tension roller; the control cabinet controls the cleaning fluid supply device, the booster pump and the spray device.

[0006] Furthermore, the spray holes of the first spray pipe are directly opposite the upper filter belt on one side of the wedge-shaped area, and the spray holes of the second spray pipe are directly opposite the lower filter belt on one side of the wedge-shaped area.

[0007] Furthermore, the spray holes are made by laser drilling.

[0008] Compared with the prior art, this utility model has the following advantages: the cleaning of the degreasing agent after mixing with the pressure-regulating spray device, coupled with the subsequent thorough rinsing with clean water, can effectively remove the sludge that has dried and solidified in the filter belt mesh. This device can effectively improve the water permeability of the filter belt, further reduce the sludge moisture content, and ensure the dewatering quality. Under the premise of improving efficiency, it achieves the stringent sludge moisture content index. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a magnified view of a portion of the wedge-shaped region; Figure 3 This is a schematic diagram of a spray pipe.

[0011] In the diagram: 1. Concentration unit, 2. Wedge zone, 3. Filter press, 4. Main dewatering roller, 5. S-shaped pressure rollers, 6. Upper filter belt, 7. Lower filter belt, 8. Storage tank, 9. Level gauge, 10. Supply valve, 11. Drain valve, 12. Control cabinet, 13. Centrifugal booster pump, 14. First spray pipe, 15. Second spray pipe, 16. Spray pipe body, 17. Spray hole, 21. First tension roller, 22. Second tension roller. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0013] Figures 1 to 3 A belt thickening filter press equipped with a belt filter press belt oil removal device is shown. It consists of a thickening device 1, a wedge zone 2, and a belt filter press belt oil removal device.

[0014] The filter press device includes an upper filter belt 6, a lower filter belt 7, a first tension roller 21, a second tension roller 22, a wedge-shaped zone 2, and a series of pressure rollers 5 arranged in an S-shape with decreasing diameter. The upper filter belt 6 and the lower filter belt 7 shuttle between the rollers. Through the cooperation between the first tension roller 21, the second tension roller 22, the main dewatering roller 4, the upper filter belt 6, and the lower filter belt 7, a wedge-shaped zone 2 is formed between the upper filter belt 6 and the lower filter belt 7; this zone is formed by the upper filter belt 6 between the first tension roller 21 and the main dewatering roller 4, and the lower filter belt 7 between the second tension roller 22 and the main dewatering roller 4.

[0015] The belt filter press oil removal device includes a cleaning fluid supply device, a control cabinet 12, a centrifugal booster pump 13, and a spray device. The cleaning fluid supply device contains a storage tank 8, a level gauge 9, a supply valve 10, and a drain valve 11. The spray device contains a first spray pipe 14 and a second spray pipe 15. The main body 16 of the spray pipe is provided with laser-drilled spray holes 17.

[0016] The first spray pipe 14 and the second spray pipe 15 contained in the spray device are preferably arranged in the wedge-shaped area 2, respectively on the upper side of the upper filter belt 6 and the lower side of the lower filter belt 7 in the wedge-shaped area 2. The spray hole 17 of the first spray pipe 14 is directly facing the upper filter belt 6 on one side of the wedge-shaped area and sprays downward; the spray hole 17 of the second spray pipe 15 is directly facing the lower filter belt 7 on one side of the wedge-shaped area and sprays upward.

[0017] The entire dewatering process of a belt filter press is continuous. Its working process is as follows: flocculation—feeding—material distribution—gravity dewatering in the concentration section—discharging from the concentration section—gravity dewatering in the filter press section—pre-compression dewatering in the filter press section—pressing dewatering in the filter press section—discharging.

[0018] During the wastewater treatment process, the flocculated suspended material effectively loses most of its free water under the action of gravity in the thickening device 1, and the material is gradually concentrated.

[0019] The concentrated material is sent to the filter press 3 through the filter cake unloading mechanism, and then dewatered by gravity again. The material is turned over and unloaded between the upper filter belt 6 and the lower filter belt 7. The upper filter belt 6 and the lower filter belt 7 in the wedge zone 2 gradually move closer to pre-press and dewater the material.

[0020] After the material is pressed and dewatered by the main dewatering roller 4, it enters a series of pressure rollers 5 arranged in an S-shape with decreasing diameter until discharge, at which point the upper filter belt 6 and lower filter belt 7 separate. This subjectes the filter cake to increasing squeezing and shearing forces, removing most of the free water and some of the capillary water from the material.

[0021] When using the belt filter press oil removal device, open the liquid supply valve 10 to add the oil removal agent and tap water to the storage tank, and dilute and mix them to complete the preparation of the oil removal agent. Use the control cabinet 12 to operate the automatic control system to regulate the booster centrifugal pump, level gauge and other equipment, and set the spraying time and spraying intensity.

[0022] The prepared degreasing agent, under the action of the booster centrifugal pump 13, is pressurized and transported from the storage tank 8 to the first spray pipe 14 and the second spray pipe 15. Through the laser-drilled spray holes 17 on the main body 16 of the spray pipe, the agent is sprayed at high pressure from the back of the filter belt, effectively removing the sludge embedded in the filter belt from the front and evenly spraying the agent onto the filter belt. As the filter belt rotates at a constant speed, the agent fully wets the filter belt, and the cleaning liquid is conveyed to the entire filter press device along with the filter belt. After compression, the cleaning liquid can make closer and more thorough contact with the filter belt, effectively breaking down residual grease and other oils.

[0023] After all the chemicals have been used up, an equal amount of tap water is injected into the storage tank. Under the action of the booster centrifugal pump 13, the tap water is pressurized and transported from the storage tank 8 to the first spray pipe 14 and the second spray pipe 15. Through the laser-drilled spray holes 17 on the main body 16 of the spray pipes, the water pressure washes the filter belt from the back, continuously cleaning the filter cloth for approximately 15 minutes. The tap water is also carried by the filter belt to the entire filter press device, where it is squeezed, resulting in a more thorough rinsing process.

[0024] After being treated with degreasing agents and rinsed with clean water, the sludge that has dried and solidified in the filter belt mesh can be effectively removed, the water permeability of the filter belt can be effectively improved, the sludge moisture content can be further reduced, and the dewatering quality can be guaranteed. Under the premise of improving efficiency, the stringent sludge moisture content target can be achieved.

[0025] The dewatering machine's filter belt oil removal device is simple to install, operate, and maintain. It reduces labor costs, enhances the oil removal effect of the belt dewatering machine, improves equipment operating efficiency, extends the service life of the filter belt, reduces sludge moisture content, and ensures safe operation of process parameters. It also directly reduces sludge storage and transportation costs. Sludge with low moisture content is easier to process and dispose of, improving the flexibility and efficiency of sludge treatment. Lowering sludge moisture content also reduces odor and other harmful gases generated during sludge treatment, improving the working environment and reducing pollution to the surrounding environment. Furthermore, sludge with low moisture content can burn more completely during incineration, improving energy utilization and reducing secondary pollution.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A belt filter press oil removal device, comprising a concentration device (1), a filter press device (3), a cleaning liquid supply device, a control cabinet (12), a centrifugal booster pump (13), and a spraying device, characterized in that, The filter press device (3) includes a wedge-shaped area (2) and S-shaped pressure rollers (5). The wedge-shaped area (2) is formed by an upper filter belt (6) between the first tension roller (21) and the main dewatering roller (4) and a lower filter belt (7) between the second tension roller (22) and the main dewatering roller (4). The cleaning liquid supply device includes a storage tank (8), a level gauge (9), a liquid supply valve (10), and a liquid discharge valve (11). The centrifugal booster pump (13) is connected to the cleaning liquid supply device and the spraying device through pipelines. The spraying device is installed on the side where the wedge-shaped area is located. The spraying device includes a first spray pipe (14) and a second spray pipe (15). The spray pipe has spray holes (17) on its main body (16). The first spray pipe (14) is installed in the space enclosed by the upper filter belt (6) running around the first tension roller (21) and is parallel to the first tension roller (21). The second spray pipe (15) is installed in the space enclosed by the lower filter belt (7) running around the second tension roller (22) and is parallel to the second tension roller (22). The control cabinet controls the cleaning liquid supply device, the booster pump (13) and the spraying device.

2. The belt filter belt oil removal device for a belt filter press according to claim 1, characterized in that, The spray hole (17) of the first spray pipe (14) is directly opposite the upper filter belt (6) on one side of the wedge-shaped area, and the spray hole (17) of the second spray pipe (15) is directly opposite the lower filter belt (7) on one side of the wedge-shaped area.

3. The belt filter belt oil removal device for a belt filter press according to claim 2, characterized in that, The spray hole (17) is made by laser drilling.

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