Production filtering equipment

Abstract

The utility model discloses production filtering equipment, and belongs to the technical field of chemical filtering equipment, and the production filtering equipment comprises a filtering device used for micron-scale solid-liquid separation of slurry; the feeding pipe is connected with an inlet of the filtering device and is used for conveying slurry to the filtering device; the filtrate pipe is connected with an outlet of the filtering device and is used for discharging filtered liquid; the two ends of the circulating pipe are communicated with the filtrate pipe and the feeding pipe respectively, and the circulating pipe is used for enabling filtered liquid to flow back to the filtering device; filtrate in the filtrate pipe flows back to the feeding pipe through the circulating pipe and finally flows back to the filtering device to be reused for manufacturing products, and micron-sized fine particles can be attached to the filtering device and cannot be lost along with the filtrate by utilizing a bridging phenomenon. According to the invention, fine materials discharged along with the filtrate can be effectively reduced, the utilization rate of the materials is improved, the yield of products is further improved, and meanwhile, the manufacturing cost of the products is also reduced.

Description

Technical Field

[0001] This application belongs to the technical field of chemical filtration equipment, and in particular relates to a production filtration device. Background Technology

[0002] A filter press is a mechanical device that uses a special filter medium to apply pressure to a material, causing the liquid to seep out. It is a commonly used solid-liquid separation device, such as the vertical filter press commonly used in metallurgical and chemical processes. In the boehmite production process, the vertical filter press is a very important piece of equipment for slurry dewatering. The boehmite slurry enters the filter chamber of the vertical filter press, where solid-liquid separation is achieved through the action of the filter cloth. After washing, pressing, and blowing, a filter cake is formed, which then proceeds to the next process.

[0003] In existing filter presses, due to the fine particle size of the material during the feeding process, some fine particles are discharged with the filtrate, resulting in product waste. Therefore, effectively solving the problem of material residue in the filtrate after filtration is a key technology for production. Utility Model Content

[0004] This application aims to solve the technical problem of waste of micron-sized particulate materials to at least a certain extent. To this end, this application provides a production filtration device that effectively reduces the discharge of finer materials with the filtrate, improves material utilization, thereby increasing product yield and reducing product manufacturing costs.

[0005] This application provides a production filtration device, which includes:

[0006] Filtration device for micron-level solid-liquid separation of slurry;

[0007] The feed pipe connects to the inlet of the filter device and is used to supply slurry to the filter device;

[0008] The filter tube connects to the outlet of the filtration device and is used to discharge the filtered liquid.

[0009] The circulation pipe is connected to the filtrate pipe and the feed pipe at both ends, and is used to return the filtered liquid to the filtration device.

[0010] In some embodiments, a liquid storage container is also included, which is connected to the circulation pipe and is used to store the filtered liquid and provide it to the filtration device.

[0011] In some embodiments, a washing liquid container is also included, which is connected to the filter tube and is used to collect the liquid discharged from the filter tube.

[0012] In some implementations, the circulation pipe is equipped with a branch valve for regulating the flow rate.

[0013] In some embodiments, the filtrate tube is equipped with a main valve for regulating the flow rate. The main valve is located between the first connection point and the washing liquid container. The first connection point is the connection between the circulation tube and the filtrate tube.

[0014] In some implementations, the circulation tube and the filter tube are welded together.

[0015] In some embodiments, a feed conveying device is also included, disposed in the feed pipe, for injecting slurry into the filtration device.

[0016] In some implementations, the liquid supply port of the feed conveyor is connected to the liquid storage container.

[0017] In some embodiments, the pore size of the filter device is 1µm ± 0.1µm.

[0018] In some embodiments, the filtration device is a filter press, which has multiple filter layers arranged vertically in a staggered manner.

[0019] As can be seen from the above technical solution, the beneficial effects of this application are as follows:

[0020] This application injects material into a filtration device through a feed pipe, and then discharges the filtered liquid through a filtrate pipe. The filtration device filters out larger particles larger than the filter pores for use in production, specifically filtering out micron-sized particles. Particles smaller than the filter pores (micron-sized) are lost with the filtrate. This application, however, can reuse particles smaller than the filtration device's filter size. The filtrate in the filtrate pipe is returned to the feed pipe via a circulation pipe, and finally back to the filtration device for reuse in product manufacturing. The principle behind the reuse of fine particles lies in the bridging phenomenon during the filtration process. Utilizing this bridging phenomenon, micron-sized fine particles can adhere to the filtration device without being lost with the filtrate. This changes the existing practice of directly discharging the filtrate after feeding. Because multiple cycles are possible, it effectively reduces the discharge of finer particles with the filtrate, improves material utilization, increases product yield, and reduces manufacturing costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced one by one below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other embodiments and drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of an embodiment of the filtration equipment of this utility model is shown;

[0023] Reference numerals: 100, production filtration equipment; 110, filtration device; 111, filter press; 112, filter bed; 120, feed conveying device; 130, washing liquid container; 140, liquid storage container; 150, feed pipe; 160, filtrate pipe; 161, main valve; 170, circulation pipe; 171, branch valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] This application is described below with reference to the accompanying drawings and specific embodiments:

[0029] Please refer to Figure 1According to a first aspect of this application, a production filtration device is provided, comprising a filtration unit 110, a feed pipe 150, a filtrate pipe 160, and a circulation pipe 170. This production filtration device 110 can be applied in the production of chemical products. Taking boehmite production as an example, the slurry is injected into the filtration unit 110, and the filter cake filtered by the filtration unit 110 is used for production. The filtration unit 110 is used for micron-level solid-liquid separation of the slurry. The pore size of the filter pores of the filtration unit 110 is on the micron level, which can filter out micron-sized solid particles and filter out even smaller particles of filtrate. The filtration unit 110 adopts conventional filtration equipment, such as a filter press 111, a centrifugal filter, etc. The feed pipe 150 is connected to the inlet of the filtration unit 110. The feed pipe 150 is a pipe and is connected to the inlet of the filtration unit 110 using conventional connection methods, such as welding, flange connection, or other connection methods. The connection between the subsequent pipes and the device also adopts conventional connection methods. The feed pipe 150 is used to transport the slurry to the filtration unit 110. The end of the feed pipe 150 can extend directly to the slurry source; the filtrate pipe 160 connects to the outlet of the filter device 110. The filtrate pipe 160 is also a pipe, and it is connected to the outlet of the filter device 110. The filtrate pipe 160 is used to discharge the filtered liquid; the two ends of the circulation pipe 170 are connected to the filtrate pipe 160 and the feed pipe 150, respectively. The hydraulic pressure in the filtrate pipe 160 is greater than that in the circulation pipe 170, so the filtrate can flow back from the filtrate pipe 160 through the circulation pipe 170. The circulation pipe 170 is used to return the filtered liquid to the filter device 110. The circulation pipe 170 can be directly connected to the inlet of the filter device 110, or it can be used directly. The filtrate during the feeding process is returned to the feed flow of the filter device 110 through the circulation pipe 170. The bridging phenomenon is used to keep the micron-sized fine particles in the filtrate in the filter device 110, which can effectively recover the micron-sized fine particles discharged with the filtrate during the feeding process. After adopting this application, on-site verification showed that the suspended matter in the filtrate decreased from 18 g / L to 1 g / L, and the filtrate became clearer under visual observation.

[0030] In existing production filtration equipment, during the feeding process, some fine particulate matter remains in the filtrate after filtration. This fine particulate matter is a raw material for product manufacturing but cannot be used in product manufacturing, resulting in material waste. This application addresses this by injecting material into the filtration device 110 through the feed pipe 150 and discharging the filtrate through the filtrate pipe 160. The filtration device 110 filters out larger particles (micron-sized particles) for use in production, while smaller particles (micron-sized particles) are lost with the filtrate. This application, however, can reuse particles smaller than the filtration device 110's filter size. The filtrate in the filtrate pipe 160 is returned to the feed pipe 150 via the circulation pipe 170, and finally back to the filtration device 110 for reuse in product manufacturing. The principle behind the reuse of fine particulate matter lies in the bridging phenomenon during the filtration process. Micron-sized fine particles can adhere to the filter device 110 without being lost with the filtrate. This changes the existing situation where the filtrate is directly discharged after normal feeding. Because it can be recycled multiple times, it effectively reduces the discharge of finer materials with the filtrate, improves material utilization, and thus increases product yield, while also reducing product manufacturing costs. At the same time, the filtrate after filtration must be treated and recycled, but the presence of fine particles in the filtrate makes recycling difficult and the treatment cost is high. This application reuses the micron-sized fine particles in the filtrate and recycles them back to the filter device 110. The recycled filtrate significantly reduces the amount of fine particles discharged, and the filtrate can be recycled at a lower cost, saving on treatment costs.

[0031] In some embodiments, the pore size of the filter device 110 is 1µm ± 0.1µm, such as 1µm or 1.1µm, capable of filtering particulate materials from 0.3µm to 1µm. The filter layer 112 in the filter device 110 has a large number of micron-sized pores, capable of filtering out particles larger than 1µm, thus forming a filter cake. In chemical filtration equipment, bridging refers to the phenomenon that at the beginning of the filtration operation, some particles with a diameter smaller than the diameter of the filter pores on the filter medium will enter or clog the pores of the filter medium. When bridging occurs, even particles with a diameter smaller than the pore diameter may be filtered out because they are blocked by these bridged small particles. In short, bridging enhances the filtration capacity of the filter medium, allowing even finer particles to be effectively retained, so that smaller particles lost in the filtrate can remain in the filter device 110.

[0032] In some embodiments, the production filtration equipment 100 further includes a liquid storage container 140, which stores the filtered liquid and provides the filtrate to the filtration device 110. The liquid storage container 140 is connected to a circulation pipe 170. The liquid storage container 140 can be a tank, trough, or other device capable of containing the filtrate, such as a storage tank. The liquid storage container 140 has an inlet and an outlet. The inlet is connected to the circulation pipe 170, and the outlet is connected to the inlet of the filtration device 110. In some embodiments, the circulation pipe 170 is provided with a branch valve 171 for adjusting the flow rate. The branch valve 171 can be a conventional valve, such as a ball valve or a gate valve. The branch valve 171 can adjust the flow rate of the circulation pipe 170, has a high degree of adjustment freedom, and is usually kept open during use. In some embodiments, the circulation pipe 170 is welded and fixed to the filtrate pipe 160. The filtrate pipe 160 has a connecting interface on its side.

[0033] In some embodiments, the production filtration equipment 100 further includes a washing liquid container 130. The washing liquid container 130 can be a tank, a trough, or other device capable of collecting filtrate, such as a washing liquid tank. The inlet of the washing liquid container 130 is connected to a filter pipe 160, which is used to collect the liquid discharged from the filter pipe 160. After collection, the filtrate in the washing liquid container 130 is discharged for processing. In some embodiments, the filter pipe 160 is provided with a main valve 161 for regulating the flow rate. The main valve 161 can be a conventional valve, such as a gate valve or a rotary valve. The main valve 161 is located between a first connection point and the washing liquid container 130. The first connection point is the connection between the circulation pipe 170 and the filter pipe 160, meaning that the main valve 161 can regulate the amount of filtrate entering the washing liquid container 130. With the above-mentioned main valve 161 and branch valve 171, when there are many fine particles in the filtrate and the filtrate is turbid, the main valve 161 can be closed and the branch valve 171 can be opened, which can increase the number of cycles and reuse the fine particles as much as possible.

[0034] In some embodiments, the production filtration equipment 100 further includes a feed conveying device 120, which is located in the feed pipe 150. The feed conveying device 120 is used to inject slurry into the filtration device 110. The feed conveying device 120 is a pump, or other devices capable of pressurizing liquids may be used. The feed conveying device 120 has a liquid inlet and a liquid outlet. The liquid inlet is directly connected to the source of the external slurry, and the liquid outlet of the feed conveying device 120 is connected to the liquid storage container 140. In this way, the slurry is pumped to the filtration device 110 through the feed conveying device 120.

[0035] In some embodiments, the inlet of the filter device 110 is located at its top, the outlet of the filter device 110 is located at its bottom, the feed pipe 150 is connected to the top of the filter device 110, and the filtrate pipe 160 is connected to the bottom of the filter device 110; the filter device 110 is a filter press 111, which has multiple filter layers 112 arranged vertically at intervals; the filter layers 112 use filter cloth capable of filtering fine particles, and the pore size of the filter cloth is small, only larger than or equal to the micron-sized particles in the filtrate. Specifically, the filter device 110 is a vertical filter press 111, which is an important dewatering equipment in boehmite production. During the production process, the slurry after hydrothermal reaction enters the filter chamber of the vertical filter press 111, and the slurry achieves solid-liquid separation through the action of the filter cloth. After washing, extrusion, and blowing, a filter cake is formed.

[0036] The operation of this application is as follows: Slurry is injected into the filter chamber of the filter device 110 via the feeding conveyor 120. Solid-liquid separation occurs through the filter cloth, with solid particles remaining on the cloth to form a filter cake. The filtrate passes through the filter cloth and enters the washing liquid container 130 via the filtrate pipe 160 for discharge. Simultaneously, the filtrate is guided from the filtrate pipe 160 after the filter device 110 into the storage container 140 via the circulation pipe 170, controlled by the main valve 161 and branch valve 171. The filtrate re-enters the filter chamber of the filter device 110 via the feeding conveyor 120, where solid particles remain on the filter cloth to form a filter cake. The filtered filtrate passes through the filter cloth again into the filtrate pipe 160, and then re-enters the storage container 140 via the circulation pipe 170. This cycle continues until the filtrate discharged from the filter device 110 is clear, with a testing time of 20 minutes.

[0037] This application has a wide range of applications, its production process is simple and feasible, the modification cost is low, it does not damage the original working condition of the equipment, there is no special equipment, the production cost is low, the efficiency is high, and it is easy to automate. This filtration method can be applied to alumina, aluminum hydroxide, boehmite, etc., and also provides a process idea for the filtration of all fine particles, with broad application prospects.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," "optional example," or "optional implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0039] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0040] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A production filter apparatus, characterized by, The application relates to a filter device for micron-level solid-liquid separation of slurry. The filter device (110) is connected with an inlet pipe (150) for feeding slurry into the filter device (110). The filter device (110) is connected with a filtrate pipe (160) for discharging filtered liquid. The filter device (110) is connected with a circulation pipe (170) for returning filtered liquid to the filter device (110). The filter device (110) is also connected with a liquid storage container (140) for storing filtered liquid and providing the filtered liquid to the filter device (110).

2. The production filtration apparatus according to claim 1, characterized by The filter device (110) is also connected with a washing liquid container (130) for collecting liquid discharged from the filtrate pipe (160).

3. The production filtration apparatus of claim 1, wherein, The circulation pipe (170) is provided with a branch valve (171) for adjusting flow.

4. The production filtration apparatus of claim 2, wherein, The filtrate pipe (160) is provided with a total valve (161) for adjusting flow, and the total valve (161) is located between a first connection point and the washing liquid container (130), wherein the first connection point is a connection point between the circulation pipe (170) and the filtrate pipe (160).

5. The production filtration apparatus of claim 3, wherein, The circulation pipe (170) and the filtrate pipe (160) are fixed by welding.

6. The production filtration apparatus of claim 3, wherein, The filter device (110) is provided with a feed transmission device (120) arranged in the inlet pipe (150) and used for injecting slurry into the filter device (110).

7. The production filtration apparatus of claim 2, wherein, The feed transmission device (120) is connected with the liquid storage container (140) through a liquid supply port.

8. The production filtration apparatus of claim 7, wherein, The filter device (110) is a filter press (111) provided with a plurality of filter layers (112) arranged in a vertical direction.

9. The production filtration apparatus of any one of claims 1-8, wherein, The filter press (111) is provided with a plurality of filter layers (112) arranged in a vertical direction.

10. The production filtration apparatus of claim 9, wherein, ​

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