Backflushing backflow prevention device of filter press
By designing a vertical reflux tube and a multi-layer inverted cone type protective net in the backblowing device of the filter press, the problems of liquid reflux and impurities are solved, and the normal operation of the equipment and the cleanliness of gas supply are achieved.
Patent Information
- Application Number
- CN202323334050.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-07
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-07
AI Technical Summary
During use, the existing filter press backblowing device is prone to return liquid due to damage to the valve or insufficient compressed air pressure, which affects the normal operation of the equipment and may cause impurities to enter the compressed air pipeline, causing blockage and equipment damage.
A filter press back-blowing and anti-reflow device including a return flow pipeline and a back-blowing gas supply pipeline is designed. The vertical return flow tube and a wavy tube lumen combine gravity and buffer speed reduction to prevent liquid from flowing back, and pass through multi-layer inverted cones. The type protective net filters the gas to prevent debris from entering the gas supply pipe.
It effectively avoids the return of liquid into the gas supply pipe, prevents equipment from being blocked and damaged, improves the gas filtration effect, and ensures the normal operation of the filter pressing equipment and the cleanliness of gas supply.
Smart Images
Figure CN222173199U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filter press equipment, in particular to a backwash anti-backflow device for a filter press. Background Art
[0002] Slurry pressing equipment is commonly used in chemical enterprises, water treatment industry, especially sewage treatment industry.
[0003] In current industry applications, during the use of the filter press, in order to make the filter cake drier, compressed air is used for backblowing to remove residual moisture in the filter plate chamber.
[0004] However, during the operation of the existing filter press backblowing device, it may be affected by valve damage, loose closure, and compressed air pressure being lower than the filter press chamber pressure, causing the filter press liquid to enter the compressed air pipeline, thereby affecting the use of other gas-using equipment. In addition, with the reflux of liquid, some impurities may enter the compressed air pipeline through the pipeline, damaging and blocking the air supply equipment that transports compressed air. Therefore, the present application provides a filter press backblowing anti-backflow device to meet the needs. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a filter press backblowing anti-backflow device to solve the problem that during the operation of the existing filter press backblowing device, the valve may be damaged and not closed tightly, and the compressed air pressure may be lower than the pressure in the filter press chamber, resulting in the filter press liquid entering the compressed air pipeline, thereby affecting the use of other gas-using equipment, and the reflux of liquid may cause some impurities to enter the compressed air pipeline through the pipeline, thereby damaging and blocking the air supply equipment that transports the compressed air.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0007] A filter press backwash anti-backflow device comprises a filter press device body, a backflow pipeline and a backwash air supply pipeline; the filter press device body comprises: a filter press device, an air inlet valve, an air supply pipe, a stop valve and a feed pipe; a backwash air inlet at one end of the filter press device is connected to a pair of air inlet valves through a vent pipe; the air supply pipe is fixedly connected to one end of the air inlet valve through a flange; one end of the air supply pipe is fixedly connected to the backflow pipeline; the backflow pipeline comprises a backflow pipe, a protective pipe, a backflow pipe valve and a drain pipe; the top of the backflow pipe is connected to the The flange is fixedly connected to the protective pipe, the bottom end of the return pipe is fixedly connected to the return pipe valve through the flange, the bottom end of the return pipe valve is fixedly connected to the drain pipe through the flange, and a splash cover is provided at the bottom end of the drain pipe; the backwash air supply pipeline includes a connecting pipe, a compressed air valve and a gas supply pipe, the bottom end of the connecting pipe is fixedly connected to the top of the protective pipe through the flange, the bottom end of the connecting pipe is fixedly connected to the compressed air valve through the flange, and the bottom end of the compressed air valve is fixedly connected to the gas supply pipe through the flange.
[0008] Preferably, the return pipe is perpendicular to the ground, and the bottom tube cavity inside the return pipe is wavy.
[0009] Preferably, the connecting pipe is U-shaped, and both ends of the connecting pipe are perpendicular to the ground.
[0010] Preferably, an annular support ring is welded to the bottom end of the protective tube, an inner sleeve is installed inside the protective tube by threaded rotation, the bottom end of the inner sleeve abuts against the top surface of the annular support ring, and a multi-layer protective net is installed inside the inner sleeve by snap-fitting.
[0011] Preferably, the mesh of the protection net is in an inverted cone shape, and the mesh of multiple layers of the protection net are staggered.
[0012] Preferably, a sealing rubber sleeve is buckled on the surface of the liquid discharge pipe, and an upper pressing ring and a lower pressing ring are pressed together at both ends of the sealing rubber sleeve.
[0013] Preferably, the upper compression ring and the lower compression ring are both rotatably mounted on the surface of the discharge pipe by means of threads.
[0014] Preferably, a reinforcing rib is welded to the bottom end of the splash shield, a supporting plate is welded to the surface of the reinforcing rib, and a flow-breaking cone is welded to the top end of the supporting plate.
[0015] Compared with the prior art, the utility model has at least the following beneficial effects:
[0016] In the above scheme, through the reflux pipe, when the pressure of the filter press equipment reaches the maximum value, if liquid enters the reflux pipe from the air inlet valve, the reflux pipe perpendicular to the ground is used to discharge the liquid in the reflux pipe through the drain pipe under the influence of gravity, so as to avoid liquid accumulation, and the wavy pipe cavity can buffer and slow down the liquid flowing in the reflux pipe. When the pressure holding time is up, the reflux pipe valve is closed, and the air inlet valve and the compressed air valve are opened in turn to back-purge the filter press equipment. At this time, there is no filtrate in the pipeline, so as to prevent the filtrate from entering the gas supply pipe in reverse. In the inside, the splash shield arranged at the bottom of the discharge pipe can reduce the impact force of the falling liquid, thereby avoiding the splashing of the discharged liquid. During the operation of the backwash anti-backflow device, the multi-layer protective net installed by the buckle inside the inner sleeve can filter the gas brought into the reflux pipe by the backflow, thereby avoiding the situation where the impurities in the gas enter the gas supply pipe and cause blockage in the gas supply pipe and damage to the gas supply equipment. The multi-layer protective net with inverted cone-shaped meshes staggeredly arranged greatly improves the effect of filtering the gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.
[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the back-blowing anti-backflow device of the filter press;
[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the drain pipe of the backwash anti-backflow device of the filter press;
[0020] Figure 3 This is a bottom-up schematic diagram of the three-dimensional structure of the splash guard of the back-blowing anti-backflow device of the filter press;
[0021] Figure 4 This is a schematic cross-sectional view of the internal structure of the protective tube of the filter press backwash anti-backflow device.
[0022] [reference numerals]
[0023] 1. Filter press equipment; 2. Air inlet valve; 3. Air supply pipe; 4. Return pipe; 5. Stop valve; 6. Feed pipe; 7. Protective pipe; 8. Connecting pipe; 9. Compressed air valve; 10. Gas supply pipe; 11. Return pipe valve; 12. Drain pipe; 13. Sealing rubber sleeve; 14. Upper pressure ring; 15. Lower pressure ring; 16. Splash cover; 17. Reinforcement ribs; 18. Support plate; 19. Flow-breaking cone; 20. Inner casing; 21. Annular support ring; 22. Protective net.
[0024] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION
[0025] The following is a detailed description of a filter press backwashing anti-backflow device provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.
[0026] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).
[0027] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.
[0028] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.
[0029] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.
[0030] like Figure 1 As shown, an embodiment of the utility model provides a backblowing anti-backflow device for a filter press, comprising a filter press equipment body, a reflux pipeline and a backblowing air supply pipeline; the filter press equipment body comprises: a filter press equipment 1, an air inlet valve 2, an air supply pipe 3, a stop valve 5 and a feed pipe 6, a backblowing air inlet at one end of the filter press equipment 1 is connected to a pair of air inlet valves 2 through a vent pipe, the air supply pipe 3 is fixedly connected to one end of the air inlet valve 2 through a flange, one end of the air supply pipe 3 is fixedly connected to the reflux pipeline, the stop valve 5 is interconnected with the feed port of the filter press equipment 1 through a connecting flange, and one end of the feed pipe 6 is fixedly connected to one end of the stop valve 5.
[0031] The reflux pipeline includes a reflux pipe 4, a protective pipe 7, a reflux pipe valve 11 and a drain pipe 12. The top of the reflux pipe 4 is fixedly connected to the protective pipe 7 through a flange, the bottom of the reflux pipe 4 is fixedly connected to the reflux pipe valve 11 through a flange, the bottom of the reflux pipe valve 11 is fixedly connected to the drain pipe 12 through a flange, and a splash guard 16 is provided at the bottom of the drain pipe 12.
[0032] The back-blowing air supply pipeline includes a connecting pipe 8, a compressed air valve 9 and a gas supply pipe 10. The bottom end of the connecting pipe 8 is fixedly connected to the top of the protective pipe 7 through a flange, the bottom end of the connecting pipe 8 is fixedly connected to the compressed air valve 9 through a flange, and the bottom end of the compressed air valve 9 is fixedly connected to the gas supply pipe 10 through a flange.
[0033] Before adding materials to the filter press equipment, first close the air inlet valve 2 on one side of the filter press equipment 1 and the compressed air valve 9 at the bottom of the connecting pipe 8, open the reflux pipe valve 11, and open the stop valve 5 on one side of the filter press equipment 1 to start feeding. After the material is filled, the pressure of the filter press equipment 1 rises to the maximum value. If liquid enters the reflux pipe from the air inlet valve 2, the liquid will naturally be discharged from the drain pipe 12 at the bottom of the reflux pipe. When the pressure holding time is up, close the reflux pipe valve 11, open the air inlet valve 2 and the compressed air valve 9 in turn, and back-purge the filter press equipment 1. At this time, there is no filtrate in the pipeline, thereby preventing the filtrate from reversely entering the gas supply pipe 10. The splash shield 16 set at the bottom of the drain pipe 12 can reduce the impact force of the falling liquid, thereby avoiding the splashing of the discharged liquid.
[0034] like Figure 1As shown, the reflux pipe 4 is perpendicular to the ground, and the bottom tube cavity inside the reflux pipe 4 is wavy. By using the reflux pipe 4 perpendicular to the ground, the liquid refluxed into the reflux pipe 4 can be discharged through the drain pipe 12 by gravity to avoid liquid accumulation, and the wavy tube cavity can buffer and slow down the liquid flowing in the reflux pipe 4.
[0035] like Figure 1 and Figure 4 As shown, the connecting pipe 8 is U-shaped, and both ends of the connecting pipe 8 are perpendicular to the ground. The use of the U-shaped connecting pipe 8 can avoid the situation where the liquid directly flows into the gas supply pipe 10 through the return pipe 4 due to the pressure channel.
[0036] like Figure 1 and Figure 4 As shown, an annular support ring 21 is welded to the bottom end of the protection tube 7, an inner sleeve 20 is installed inside the protection tube 7 by means of threaded rotation, the bottom end of the inner sleeve 20 abuts against the top surface of the annular support ring 21, and a multi-layer protection net 22 is installed inside the inner sleeve 20 by means of buckles. By using the inner sleeve 20 installed inside the protection tube 7 by means of threaded rotation, the inner sleeve 20 can be conveniently and quickly disassembled and replaced, and the multi-layer protection net 22 installed inside the inner sleeve 20 by means of buckles can be used to filter the gas that is brought up into the reflux pipe due to reflux, thereby preventing impurities in the gas from entering the gas supply pipe 10, causing blockage inside the gas supply pipe 10 and damaging the gas supply equipment. The multi-layer protection net 22 with inverted cone-shaped meshes staggeredly arranged greatly improves the effect of filtering gas.
[0037] like Figures 1 to 3 As shown, a sealing rubber sleeve 13 is buckled on the surface of the drain pipe 12, and an upper pressing ring 14 and a lower pressing ring 15 are pressed together at both ends of the sealing rubber sleeve 13. The upper pressing ring 14 and the lower pressing ring 15 can be used to extrude the sealing rubber sleeve 13 to deform and expand the sealing rubber sleeve 13, so that when the drain pipe 12 is inserted into the filtrate storage tank used for filter pressing, the expanded sealing rubber sleeve 13 is used to seal the gap between the drain pipe 12 and the filtrate storage tank. The upper pressing ring 14 and the lower pressing ring 15 installed on the surface of the drain pipe 12 through threaded rotation are convenient for quick rotation adjustment to meet the adjustment of the gap filling effect between the sealed drain pipe 12 and the filtrate storage tank.
[0038] like Figures 1 to 3 As shown, a reinforcing rib 17 is welded to the bottom end of the splash shield 16, a support plate 18 is welded to the surface of the reinforcing rib 17, and a flow-breaking cone 19 is welded to the top end of the support plate 18. The flow-breaking cone 19 welded to the top end of the support plate 18 at the bottom end of the splash shield 16 can break the flow of liquid discharged from the drain pipe 12, and buffer the flowing liquid, thereby preventing the liquid from falling directly into the filtrate storage tank, causing the liquid in the filtrate storage tank to shake and affect the precipitation of the slurry.
[0039] The technical solution provided by the utility model is that when the material is filled, the pressure of the filter press equipment rises to the maximum value. If there is liquid entering the reflux pipe from the air inlet valve, the reflux pipe vertical to the ground is used, and the liquid in the reflux pipe is discharged through the drain pipe by gravity to avoid liquid accumulation, and the wavy tube cavity can buffer and slow down the liquid flowing in the reflux pipe. When the pressure holding time is up, the reflux pipe valve is closed, and the air inlet valve and the compressed air valve are opened in turn to back-purge the filter press equipment. At this time, there is no filtrate in the pipeline, thereby preventing the filtrate from reversely entering the gas supply valve. In the supply pipe, the splash guard arranged at the bottom of the discharge pipe can reduce the impact force of the falling liquid, thereby avoiding the splashing of the discharged liquid. During the operation of the backwash anti-backflow device, the multi-layer protective net installed by snap-fit inside the inner sleeve can filter the gas brought into the reflux pipe by the backflow, thereby avoiding the situation where foreign matter in the gas enters the gas supply pipe and causes blockage inside the gas supply pipe and damages the gas supply equipment. The multi-layer protective net with inverted cone-shaped meshes staggeredly arranged greatly improves the effect of filtering gas.
[0040] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.
[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A filter press backwash anti-backflow device, characterized in that: include: Filter press equipment body, reflux pipeline and backwash air supply pipeline; The filter press equipment body comprises a filter press equipment, an air inlet valve, an air supply pipe, a stop valve and a feed pipe. A back-blowing air inlet at one end of the filter press equipment is connected to a pair of air inlet valves through a vent pipe. The air supply pipe is fixedly connected to one end of the air inlet valve through a flange, and one end of the air supply pipe is fixedly connected to a return pipeline. The reflux pipeline includes a reflux pipe, a protective pipe, a reflux pipe valve and a drain pipe. The top of the reflux pipe is fixedly connected to the protective pipe through a flange, the bottom of the reflux pipe is fixedly connected to the reflux pipe valve through a flange, the bottom of the reflux pipe valve is fixedly connected to the drain pipe through a flange, and a splash guard is provided at the bottom of the drain pipe; The back-blowing air supply pipeline includes a connecting pipe, a compressed air valve and a gas supply pipe. The bottom end of the connecting pipe is fixedly connected to the top of the protection pipe through a flange, the bottom end of the connecting pipe is fixedly connected to the compressed air valve through a flange, and the bottom end of the compressed air valve is fixedly connected to the gas supply pipe through a flange.
2. The filter press backwash anti-backflow device according to claim 1, characterized in that: The return pipe is perpendicular to the ground, and the bottom tube cavity inside the return pipe is wavy.
3. The filter press backwash anti-backflow device according to claim 1, characterized in that: The connecting pipe is U-shaped, and both ends of the connecting pipe are perpendicular to the ground.
4. The filter press backwash anti-backflow device according to claim 1, characterized in that: An annular support ring is welded at the bottom end of the protection tube, an inner sleeve is installed inside the protection tube by threaded rotation, the bottom end of the inner sleeve abuts against the top surface of the annular support ring, and a multi-layer protection net is installed inside the inner sleeve by buckles.
5. The filter press backwash anti-backflow device according to claim 4, characterized in that: The meshes of the protection net are in an inverted cone shape, and the meshes of the multiple layers of protection net are arranged in a staggered manner.
6. The filter press backwash anti-backflow device according to claim 1, characterized in that: A sealing rubber sleeve is buckled on the surface of the liquid discharge pipe, and an upper pressing ring and a lower pressing ring are pressed together at both ends of the sealing rubber sleeve.
7. The filter press backwash anti-backflow device according to claim 6, characterized in that: The upper compression ring and the lower compression ring are both rotatably mounted on the surface of the liquid discharge pipe through threads.
8. The filter press backwash anti-backflow device according to claim 1, characterized in that: A reinforcing rib is welded on the bottom end of the splash shield, a supporting plate is welded on the surface of the reinforcing rib, and a flow-breaking cone is welded on the top end of the supporting plate.