Liquid backflow mechanism and filtering system

Abstract

The utility model discloses a liquid backflow mechanism and a filtering system. The liquid backflow mechanism comprises a filtering box for filtering dirty liquid and a storage tank box for separately storing the dirty liquid and filtrate, the filter box comprises a dirty liquid chamber for storing dirty liquid and a filtrate chamber for storing filtrate, and a filter membrane for filtering the dirty liquid is arranged between the dirty liquid chamber and the filtrate chamber; the storage tank box comprises a dirty liquid tank for storing dirty liquid and a filtrate tank for storing filtrate; the dirty liquid tank is connected with the dirty liquid chamber through a pipeline, and the filtrate chamber is connected with the filtrate tank through a pipeline; a one-way return pipe is connected between the filtrate chamber and the dirty liquid tank, and the flow direction of the return pipe is from the filtrate chamber to the dirty liquid tank. The negative pressure effect of the filtering box can be reduced, and the filtering effect of the filtering system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of negative pressure filtration, in particular to a liquid reflux mechanism and a filtration system. Background Art

[0002] The filtration system forms negative pressure at the filtrate outlet as the driving force for filtration. This type of filter is divided into two types: intermittent operation and continuous operation. Intermittent operation vacuum filter can filter suspensions of various concentrations, and the continuous operation vacuum filtration system is suitable for filtering thick suspensions containing more solid particles.

[0003] In the process of using the vacuum filtration system, since the liquid must overcome resistance when passing through the filter residue layer and the filter medium, there must be a pressure difference on both sides of the filter medium, which is the driving force for filtration.

[0004] However, increasing the pressure on one side can speed up the filtration. However, the deformed particles under pressure are prone to block the pores of the filter medium when there is a large pressure difference, which in turn slows down the filtration. Utility Model Content

[0005] The present application provides a liquid reflux mechanism and a filtration system, which can reduce the negative pressure effect of the filter box and increase the filtration effect of the filtration system.

[0006] The present application provides a liquid reflux mechanism, comprising a filter box for filtering dirty liquid and a storage tank box for storing dirty liquid and filtrate separately; the filter box comprises a dirty liquid room for storing dirty liquid and a filtrate room for storing filtrate, a filter membrane for filtering dirty liquid is arranged between the dirty liquid room and the filtrate room; the storage tank box comprises a dirty liquid tank for storing dirty liquid and a filtrate tank for storing filtrate; the dirty liquid tank is connected to the dirty liquid room by a pipeline, and the filtrate room is connected to the filtrate tank by a pipeline; a unidirectional reflux pipe is connected between the filtrate room and the dirty liquid tank, and the flow direction of the reflux pipe is from the filtrate room to the dirty liquid tank.

[0007] By adopting the above technical solution, in negative pressure filtration, when the filter box maintains a negative pressure state for a long time, the filtrate will flow back from the filtrate room to the dirty liquid room, which will cause certain risks to production applications. At the same time, the excessive pressure on one side will cause impurities to block the filter membrane. By connecting a one-way reflux pipe between the filtrate room and the dirty liquid tank, the flow direction of the reflux pipe is from the filtrate room to the dirty liquid tank. Then, when the negative pressure of the filtrate box is too large, by returning the filtrate to the dirty liquid tank, not only can the filtrate be re-filtered, but also the effect of the negative pressure in the filtrate room is eliminated, thereby slowing down the effect of filter membrane blockage.

[0008] Optionally, the reflux pipe is arranged in sections, and the reflux pipes are connected to each other by flanges.

[0009] By adopting the above technical solution, the connection of the return pipe is facilitated and the sealing performance of the return pipe connection is improved.

[0010] Optionally, a water stop valve is provided at one end of the return pipe close to the filter box, and a water stop valve is provided at one end of the return pipe close to the storage tank box.

[0011] By adopting the above technical solution, the flow rate and flow rate of the filtrate in the reflux pipe are controlled, thereby controlling the negative pressure effect between the filtrates.

[0012] Optionally, a flow meter is provided on the return pipe; the flow meter is arranged at an end of the water stop valve away from the filter box, or the flow meter is arranged at an end of the water stop valve away from the storage tank box.

[0013] By adopting the above technical solution, the flow rate and flow rate of the filtrate in the reflux pipe can be accurately controlled, which helps to control the negative pressure effect between the filtrates.

[0014] On the other hand, the present application discloses a filtration system, including a transmission mechanism, a drying mechanism and the liquid reflux mechanism; the transmission mechanism includes a transmission shaft and a filter membrane installed on the transmission shaft, the filter membrane is transferred to the filter box, and transferred from the filter box to the drying mechanism; the drying mechanism includes a drying box and a drying fan arranged on the drying box, the filter membrane is transferred to the drying box, and the air outlet of the drying fan is directed toward the filter membrane in the drying box.

[0015] By adopting a modular design, it is possible to facilitate maintenance and replacement of various mechanisms in industrial production, which in turn helps to improve the application of centralized filtration systems in the production process.

[0016] Optionally, it includes a main frame structure, which includes a first layer structure and a second layer structure, the filter box is installed on the first layer structure, and the storage tank box is installed on the second layer structure; the filter box is provided with an air pump for directing the filtrate from the filtrate room to the dirty liquid tank, and one end of the reflux pipe is connected to the air pump.

[0017] Optionally, a step is provided between the first structure layer and the second structure layer, and a railing is provided at an edge of the second structure layer.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0019] 1. The present application connects a one-way reflux pipe between the filtrate room and the dirty liquid tank, so that the flow direction of the reflux pipe is from the filtrate room to the dirty liquid tank, which can not only re-filter the filtrate, but also eliminate the effect of negative pressure in the filtrate room.

[0020] 2. The return pipe in the present application is connected by a flange, which facilitates the connection and stability of the return pipe and also improves the sealing of the return pipe connection.

[0021] 3. This application uses a water stop valve on the reflux pipe to control the flow rate and flow of the filtrate in the reflux pipe, thereby controlling the negative pressure effect between the filtrates.

[0022] 4. This application adopts the method of installing a flow meter on the reflux pipe, so that the flow rate and flow rate of the filtrate in the reflux pipe can be accurately viewed and controlled, which helps to control the negative pressure effect between the filtrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of the filtration system in the embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the overall structure of the filtration system in the embodiment of the present application;

[0026] Figure 3 Schematic diagram of the overall structure of the liquid reflux mechanism in the embodiment of the present application.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. Transmission mechanism; 11. Transmission shaft; 12. Filter membrane; 2. Drying mechanism; 21. Drying box; 22. Drying fan; 23. Blanking box; 3. Liquid reflux mechanism; 31. Filter box; 32. Storage tank box; 321. Dirty liquid tank; 322. Filtrate tank; 323. Reflux pipe; 324. Water stop valve; 325. Flow meter; 4. Main frame structure; 41. First layer structure; 42. Second layer structure; 43. Stairs; 44. Railing. DETAILED DESCRIPTION

[0028] The present application provides a liquid reflux mechanism, which can reduce the negative pressure effect of the filter box and increase the filtering effect of the filter system.

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices.

[0031] Reference Figure 1 A filtering system in this embodiment includes a transmission mechanism 1, a drying mechanism 2 and a liquid reflux mechanism 3. Each mechanism is interconnected by a pipeline, which can facilitate maintenance and replacement of various mechanisms in industrial production.

[0032] Among them, the liquid reflux mechanism 3 includes a filter box 31 for filtering dirty liquid and a storage tank box 32 for storing dirty liquid and filtrate separately. The filter box 31 has a dirty liquid room for storing dirty liquid and a filtrate room for storing filtrate in the prior art. A filter membrane 12 for filtering dirty liquid is arranged between the dirty liquid room and the filtrate room. When the dirty liquid in the dirty liquid room passes through the filter membrane 12, it is filtered under negative pressure and flows to the filtrate room for storage. The storage tank box 32 includes a dirty liquid tank 321 for storing dirty liquid and a filtrate tank 322 for storing filtrate; the dirty liquid tank 321 is connected to the dirty liquid room by a pipeline, and the filtrate room is connected to the filtrate tank 322 by a pipeline. The dirty liquid tank 321 and the filtrate tank 322 store the filtrate in the filtrate room and the dirty liquid in the dirty liquid room respectively.

[0033] Reference Figure 2 and Figure 3 A one-way reflux pipe 323 is connected between the filtrate room and the dirty liquid tank 321, and the flow direction of the reflux pipe 323 is from the filtrate room to the dirty liquid tank 321. In the negative pressure filtration, when the filter box 31 maintains a negative pressure state for a long time, the filtrate will flow back from the filtrate room to the dirty liquid room, which will cause certain risks to the production application; at the same time, the excessive pressure on one side will cause the filter impurities to block the filter membrane. By connecting a one-way reflux pipe 323 between the filtrate room and the dirty liquid tank 321, the flow direction of the reflux pipe 323 is from the filtrate room to the dirty liquid tank 321. When the negative pressure of the filtrate box is too large, the filtrate can be re-filtered by returning the filtrate to the dirty liquid tank 321, and the effect of the negative pressure in the filtrate room can be eliminated.

[0034] Specifically, the return pipe 323 in this embodiment is arranged in sections, and the return pipes 323 are connected to each other by flanges, which facilitates the connection of the return pipe 323 and improves the sealing performance of the connection of the return pipe 323. At the same time, a water stop valve 324 is provided at one end of the return pipe 323 close to the filter box 31, and a water stop valve 324 is provided at one end of the return pipe 323 close to the storage tank box 32, thereby controlling the flow rate and flow rate of the filtrate in the return pipe 323. Furthermore, a flow meter 325 is provided on the return pipe 323. Among them, the flow meter 325 is arranged at the end of the water stop valve 324 away from the filter box 31; at the same time, the flow meter 325 is also arranged at the end of the water stop valve 324 away from the storage tank box 32, which further accurately controls the flow rate and flow rate of the filtrate in the return pipe 323, and helps to control the negative pressure effect between the filtrates.

[0035] In addition, refer to Figure 2 The transmission mechanism 1 includes a transmission shaft 11 and a filter membrane 12 installed on the transmission shaft 11, wherein the transmission shaft 11 is connected to the output shaft of the motor, thereby controlling the movement and transportation of the filter membrane 12. The filter membrane 12 is transported to the filtering mechanism. When the dirty liquid to be filtered passes through the filter membrane 12, the used filter membrane 12 is transported from the filtering mechanism to the drying mechanism 2 for drying.

[0036] The drying mechanism 2 includes a drying box 21 for drying the filter membrane 12, a drying fan 22 installed on the drying box 21, and a blanking box 23 for loading filter residue. When the filter membrane 12 is transported to the drying box 21, the air outlet of the drying fan 22 is directed toward the filter membrane 12 in the drying box 21 to dry the filter membrane 12. At the same time, a blanking port is provided at the bottom of the drying box 21, and the blanking port is aligned with the opening of the blanking box 23, so that the filter residue (filter cake) can be uniformly collected and processed, thereby improving work efficiency.

[0037] In addition, the filtration system also includes a main frame structure 4, wherein the main frame structure 4 includes a first layer structure 41 and a second layer structure 42, a step 43 is provided between the first layer structure 41 and the second layer structure 42, and a railing 44 is provided at the edge of the second layer structure 42 to provide safety protection measures for the workers. At the same time, the filter box 31 is installed on the first layer structure 41, and the storage tank box 32 is installed on the second layer structure 42, which reduces the footprint of the system and facilitates the unified treatment of dirty liquid and filtrate. In addition, an air pump is provided in the reflux filter box 31 to direct the filtrate from the filtrate room to the dirty liquid tank 321, and one end of the reflux pipe 323 is connected to the air pump, and the reflux of the filtrate in the reflux pipe 323 is achieved by means of the air pump, thereby ensuring the safety of the filtration system during use.

[0038] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0039] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

[0040] This specification and drawings are merely exemplary illustrations of the present application and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. A liquid reflux mechanism, characterized in that: It comprises a filter box (31) for filtering dirty liquid and a storage tank box (32) for storing dirty liquid and filtrate separately; The filter box (31) comprises a dirty liquid room for storing dirty liquid and a filtrate room for storing filtrate, and a filter membrane (12) for filtering the dirty liquid is arranged between the dirty liquid room and the filtrate room; the storage tank box (32) comprises a dirty liquid tank (321) for storing dirty liquid and a filtrate tank (322) for storing filtrate; the dirty liquid tank (321) and the dirty liquid room are connected by a pipeline, and the filtrate room and the filtrate tank (322) are connected by a pipeline; A one-way reflux pipe (323) is connected between the filtrate chamber and the dirty liquid tank (321), and the flow direction of the reflux pipe (323) is from the filtrate chamber to the dirty liquid tank (321).

2. The liquid reflux mechanism according to claim 1, characterized in that: The return pipes (323) are arranged in sections, and the return pipes (323) are connected to each other by flanges.

3. The liquid reflux mechanism according to claim 2, characterized in that: A water stop valve (324) is provided at one end of the return pipe (323) close to the filter box (31), and a water stop valve (324) is provided at one end of the return pipe (323) close to the storage tank box (32).

4. The liquid reflux mechanism according to claim 3, characterized in that: The return pipe (323) is provided with a flow meter (325); the flow meter (325) is arranged at one end of the water stop valve (324) away from the filter box (31), or the flow meter (325) is arranged at one end of the water stop valve (324) away from the storage tank box (32).

5. A filtering system, characterized in that: It comprises a transmission mechanism (1), a drying mechanism (2) and a liquid reflux mechanism (3) as claimed in any one of claims 1 to 4; The transmission mechanism (1) comprises a transmission shaft (11) and a filter membrane (12) mounted on the transmission shaft (11); the filter membrane (12) is transferred to the filter box (31), and then transferred from the filter box (31) to the drying mechanism (2); the drying mechanism (2) comprises a drying box (21) and a drying fan (22) arranged on the drying box (21); the filter membrane (12) is transferred to the drying box (21), and the air outlet of the drying fan (22) faces the filter membrane (12) in the drying box (21).

6. The filtration system according to claim 5, characterized in that The invention comprises a main frame structure (4), wherein the main frame structure (4) comprises a first layer structure (41) and a second layer structure (42), wherein the filter box (31) is installed on the first layer structure (41), and the storage tank box (32) is installed on the second layer structure (42); an air pump for directing filtrate from the filtrate room to the dirty liquid tank (321) is arranged in the filter box (31), and one end of the reflux pipe (323) is connected to the air pump.

7. The filtration system according to claim 6, characterized in that A step (43) is provided between the first layer structure (41) and the second layer structure (42), and a handrail (44) is provided at the edge of the second layer structure (42).

Images