Adjustable bulkhead filter

Abstract

The utility model provides a kind of adjustable partition filter, through the innovative movable partition and guide rail combination structure, the independent flexible adjustment of the height of each layer filter medium is realized, can be according to material impurity content accurate distribution the filling amount of each stage alkali medium, optimizes purification efficiency;Its layered packaging design supports after shutdown individually replace the specific medium layer that has failed, significantly reduces maintenance time, reduces alkali consumption and operating cost;The sealing cooperation between partition and tank effectively prevents material short circuit and mutual intermixing between different media, ensures stable gradation filtration effect;The whole device is pure mechanical structure, high reliability and easy to implement. The device is particularly suitable for deep removal of iron ions and acidic impurities in chloromethylbenzene production, can effectively solve the discoloration problem of product, improve product quality, have very high industrial application value.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to an adjustable diaphragm filter. Background Technology

[0002] Chlorotoluene, an important chemical intermediate, is widely used in the synthesis of fine chemicals such as dyes, pesticides, and pharmaceuticals. During its production, due to factors such as corrosion of raw materials, catalysts, or equipment, trace amounts of iron ions and acidic impurities are often unavoidably present in the finished product. These impurities readily undergo oxidation or color reactions upon contact with air, causing the originally clear and transparent chlorotoluene to gradually turn yellowish-brown, severely affecting the product's appearance and commercial value, and potentially even adversely impacting the synthesis reactions of downstream products. Therefore, deep purification of the chlorotoluene product to remove iron ions and acidic substances is a crucial post-processing step for improving product quality.

[0003] Currently, industrial purification of such liquids often employs fixed-bed filters, filled with solid alkalis such as soda ash or caustic soda as the filter medium. Acidic components and metal ions are removed through neutralization and adsorption. However, existing fixed-bed filters are typically statically packed structures with a fixed, non-adjustable filter bed height. In actual operation, different alkali media are consumed at different rates, with the lower layer often failing before the upper layer. Replacing the filter media requires shutting down the machine and emptying the entire filter tank, which is cumbersome, inefficient, and results in the discarding of partially degraded alkali media, increasing production costs and wasting resources. Furthermore, fixed-bed structures cannot flexibly adjust the filling volume of each media layer according to fluctuations in the material's impurity content, lacking process adaptability. The media layers may also develop channeling or gaps due to long-term use or pressure changes, leading to material short-circuiting and reduced filtration efficiency. Therefore, there is an urgent need in this field for a dedicated chlorotoluene filtration device that allows for flexible adjustment of the filter bed height, supports layered media replacement, is easy to operate and maintain, and effectively guarantees purification results. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable diaphragm filter to solve the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides an adjustable diaphragm filter, comprising: The filter tank body is vertically arranged, and its top and bottom are respectively provided with an upper end cap and a lower end cap; Bottom feed inlet, located at the bottom of the lower end cap, is used to introduce the material to be processed; A top discharge port is located at the top of the upper end cap and is used to discharge the purified material. A multi-layer adjustable filter unit is disposed inside the filter tank body and includes a first filter layer, a second filter layer and a third filter layer arranged sequentially from bottom to top. The first filter layer, the second filter layer and the third filter layer are all separated and encapsulated by partitions. The guide rail is vertically fixedly installed on the inner wall of the filter tank body; A slider is fixed to the edge of the partition and slides in cooperation with the guide rail. It is used for the partition to move vertically along the guide rail and is fixed by a positioning mechanism.

[0006] Preferably, the partition plate adopts a perforated plate structure, and its edges are provided with sealing rings.

[0007] Preferably, the positioning mechanism includes a limiting hole and a limiting bolt. The limiting hole is formed on the guide rail, and the limiting bolt passes through the slider and is detachably installed in the limiting hole.

[0008] Preferably, the bottom of the filter tank is provided with a bottom support perforated plate to support the first filter material layer.

[0009] Preferably, the top of the filter tank is provided with a top pressing perforated plate to press the third filter material layer.

[0010] Preferably, the side wall of the filter tank is provided with multiple manholes.

[0011] Preferably, the bottom of the lower end cap is also provided with a drain port for draining residual liquid in the tank during maintenance.

[0012] Preferably, the top of the upper end cap is also provided with a pressure gauge interface for installing pressure monitoring instruments.

[0013] Preferably, the guide rails are arranged symmetrically along the central axis of the filter tank body, and there are no fewer than two rails.

[0014] Preferably, the bottom of the filter tank is provided with fixed support feet.

[0015] The present invention achieves the following beneficial technical effects compared to the prior art: This utility model provides an adjustable diaphragm filter. Through an innovative combination of movable diaphragms and guide rails, it achieves independent and flexible adjustment of the height of each filter media layer. It can precisely allocate the filling amount of each level of alkaline media according to the impurity content of the material, optimizing purification efficiency. Its layered encapsulation design allows for individual replacement of specific media layers that have failed after shutdown, significantly reducing maintenance time, alkali consumption, and operating costs. The sealed fit between the diaphragm and the tank effectively prevents material short-circuiting and mixing between different media, ensuring stable graded filtration results. The entire device is a purely mechanical structure, highly reliable, and easy to implement. This device is particularly suitable for the deep removal of iron ions and acidic impurities in chlorotoluene production, effectively solving product discoloration problems, improving product quality, and possessing high industrial application value. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the adjustable diaphragm filter structure provided by this utility model; Figure 2 A schematic diagram of the positioning mechanism in the adjustable diaphragm filter provided by this utility model. Detailed Implementation

[0018] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] 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 some embodiments of the present utility model, and not all embodiments. 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.

[0021] The purpose of this invention is to provide an adjustable diaphragm filter to solve the problems existing in the prior art.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: This embodiment provides an adjustable diaphragm filter. Please refer to [link / reference]. Figure 1 and Figure 2 This utility model provides an adjustable baffle filter, particularly suitable for the deep removal of trace iron ions and acidic impurities from chlorotoluene products. The filter has a vertical cylindrical structure, consisting of a filter tank body 1, a lower end cap 2, an upper end cap 13, a bottom inlet 3, a top outlet 14, and multiple adjustable filter units. The filter tank body 1 is vertically arranged, with its bottom connected to the flange of the lower end cap 2 and its top connected to the flange of the upper end cap 13, forming a sealed pressure-bearing space. The bottom of the lower end cap 2 has a bottom inlet 3 for continuously introducing the chlorotoluene material to be purified; the top of the upper end cap 13 has a top outlet 14 for discharging the purified material after multi-stage alkaline medium adsorption and neutralization. A drain port 16 is also provided at the bottom of the tank to completely empty the residual liquid before maintenance or material replacement; a pressure gauge interface 15 is provided at the top for real-time monitoring of operating pressure to ensure operational safety.

[0024] Specifically, a multi-layer adjustable filtration unit is arranged inside the tank, consisting of a first filter layer 5, a second filter layer 6, and a third filter layer 7 from bottom to top. Each layer is filled with solid alkaline media of different particle sizes and alkalinity to meet the requirements of graded removal of iron ions and acidic impurities. The first filter layer 5 undertakes the main neutralization and preliminary adsorption tasks, so it has the largest filling volume and can be filled with large-particle salt. The second filter layer 6 uses a medium with moderate alkalinity to deeply neutralize residual acidic components, and can use flake caustic soda. The third filter layer 7 uses fine-particle alkali agents with high specific surface area to capture trace amounts of iron ions and colloidal impurities, ensuring that the output color meets the standards, and can use granular caustic soda. The three filter layers are separated and sealed by a partition 8. The partition 8 has a porous plate structure with pores smaller than the minimum particle size of the corresponding filter media, which allows the liquid to pass through uniformly while effectively trapping solid media and preventing layering. The edges of the partition 8 are fitted with corrosion-resistant sealing rings, forming a sliding sealing pair with the inner wall of the tank.

[0025] Furthermore, to achieve flexible adjustment of the height of each filter layer, two vertical guide rails 17 are symmetrically arranged axially on the inner side wall of the tank. The guide rails 17 are made of T-shaped stainless steel profiles and are welded and fixed to the tank wall. Slider 9 is fixed to the outer periphery of the partition 8 by bolts at corresponding positions. The slider 9 has a T-shaped groove matching the cross-section of the guide rail 17, allowing the partition 8 to slide freely up and down along the guide rail 17. A positioning mechanism 11 is provided on the slider 9. This positioning mechanism 11 consists of limiting holes 111 and limiting bolts 112: the web of the guide rail 17 has several limiting holes 111 at equal intervals from top to bottom, with the spacing designed to be 50 mm or 100 mm according to process requirements; the web of the slider 9 has corresponding through holes, through which the limiting bolts 112 pass and are screwed into the limiting holes 111, thus locking the partition 8 at the required height. After a period of operation, if a certain layer of filter media is detected to fail first, the operator only needs to loosen the limiting bolt 112 of the corresponding baffle 8 to move the baffle 8 up or down, thereby reducing the space of the failed layer and expanding the space of the fresh medium layer.

[0026] Furthermore, the bottom layer of the tank is equipped with a bottom support perforated plate 4, the edges of which are welded and fixed to the tank wall to support the first filter media layer 5 and prevent the filter media from sinking and clogging the bottom inlet 3. The top layer is equipped with a top pressing perforated plate 10, which is connected to the upper end cap 13 by a uniformly distributed spring. Under the pre-tension of the spring, a constant downward pressure is applied to the third filter media layer 7 to prevent gaps or channeling caused by media floating or pressure fluctuations. DN 450 manholes 12 are staggered at different heights on the side wall of the tank, which allows operators to enter the tank through a quick-opening structure without disassembling the tank to adjust the height of the baffle 8, sample the filter media, or replace parts of it.

[0027] In actual operation, the chlorotoluene to be purified is continuously pumped into the filter through the bottom inlet 3, passing through the first, second and third filter media layers in sequence. Under the neutralization and adsorption of the solid alkali in each layer, the iron ions are retained in the form of ferric hydroxide, and the acidic components are neutralized to form soluble salts. The purified material finally flows out from the top outlet 14 and enters the subsequent process.

[0028] Furthermore, due to the sliding fit of the sealing ring between the partition 8 and the guide rail 17, and the continuous clamping force provided by the top pressing perforated plate 10, the filter media layers can maintain good gradation and density even under pressure fluctuations or temperature changes, avoiding channeling and ensuring long-term stable filtration performance. The entire device is a purely mechanical structure, requiring no additional power, and is reliable in operation and easy to maintain. It is particularly suitable for the deep purification of fine chemical products such as chlorotoluene, which are prone to discoloration and have extremely high requirements for iron ions and acidity, and has good prospects for industrial application.

[0029] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0031] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An adjustable diaphragm filter, characterized in that, include: The filter tank body (1) is vertically arranged, and its top and bottom are respectively provided with an upper end cap (13) and a lower end cap (2). Bottom feed port (3), the bottom feed port (3) is located at the bottom of the lower end cap (2) and is used to feed in the material to be processed; Top discharge port (14), the top discharge port (14) is located at the top of the upper end cap (13) and is used to discharge the purified material; A multi-layer adjustable filter unit is located inside the filter tank (1) and includes a first filter layer (5), a second filter layer (6) and a third filter layer (7) arranged sequentially from bottom to top. The first filter layer (5), the second filter layer (6) and the third filter layer (7) are all separated and encapsulated by partitions (8). Guide rail (17), the guide rail (17) is vertically fixedly installed on the inner side wall of the filter tank body (1); The slider (9) is fixed to the edge of the partition (8) and slides in cooperation with the guide rail (17) for the partition (8) to move vertically along the guide rail (17) and be fixed by the positioning mechanism (11).

2. The adjustable diaphragm filter according to claim 1, characterized in that, The partition (8) adopts a perforated plate structure and has a sealing ring on its edge.

3. The adjustable diaphragm filter according to claim 1, characterized in that, The positioning mechanism (11) includes a limiting hole (111) and a limiting bolt (112). The limiting hole (111) is opened on the guide rail (17), and the limiting bolt (112) passes through the slider (9) and is detachably installed in the limiting hole (111).

4. The adjustable diaphragm filter according to claim 1, characterized in that, The bottom of the filter tank (1) is provided with a bottom support perforated plate (4) to support the first filter material layer (5).

5. The adjustable diaphragm filter according to claim 1, characterized in that, The top of the filter tank (1) is provided with a top pressing porous plate (10) for pressing the third filter layer (7).

6. The adjustable diaphragm filter according to claim 1, characterized in that, The side wall of the filter tank (1) is provided with multiple manholes (12).

7. The adjustable diaphragm filter according to claim 1, characterized in that, The bottom of the lower end cap (2) is also provided with a drain port (16) for draining the residual liquid in the tank during maintenance.

8. The adjustable diaphragm filter according to claim 1, characterized in that, The top of the upper end cap (13) is also provided with a pressure gauge interface (15) for installing pressure monitoring instruments.

9. The adjustable diaphragm filter according to claim 1, characterized in that, The guide rails (17) are arranged symmetrically along the central axis of the filter tank body (1) and there are no fewer than two rails.

10. The adjustable diaphragm filter according to any one of claims 1 to 9, characterized in that, The bottom of the filter tank (1) is provided with fixed support feet.

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