An intermediate filter device

Abstract

The utility model belongs to the technical field of intermediate filtering, disclose a kind of intermediate filtering device, including filter tank, the top of filter tank is equipped with feed inlet, the bottom of filter tank is equipped with liquid discharge port;Inner pipeline, inner pipeline is coaxially installed in filter tank inside, and feed inlet is connected with inner pipeline, and the outer surface of the lower section of inner pipeline is equipped with inner filter hole;Outer pipeline, outer pipeline is coaxially installed in filter tank inside, and the outer surface of the lower section of outer pipeline is equipped with outer filter hole, and the aperture of outer filter hole is less than the aperture of inner filter hole;Deslag cover, vibration generator is installed on deslag cover.The utility model is through the dual-stage filtration structure of inner pipeline coarse filtration, outer pipeline precision filtration and grade intercept solid particles, then combine spiral guide vane optimization fluid distribution, significantly reduce intermediate residual rate, simultaneously combine vibration generator initiative anti-blocking and passive anti-adhesion of anti-crystallization coating, double protection continuous operation stability, can reduce the number of shutdown maintenance.

Description

Technical Field

[0001] This utility model relates to the field of intermediate filtration technology, and in particular to an intermediate filtration device. Background Technology

[0002] Intermediate filtration devices are equipment systems specifically used in chemical, pharmaceutical and other production processes to perform solid-liquid separation, impurity removal or purification of intermediate products (i.e., intermediates). These devices are usually installed between the reaction vessel and subsequent process equipment and are a key link in continuous production processes.

[0003] Traditional intermediate filtration devices mostly use fixed filter screens or centrifugal separation structures, which have the following problems: 1) The filter screen is prone to clogging, requiring frequent shutdowns for cleaning; 2) The solid-liquid separation efficiency is low and the intermediate residue rate is high. Therefore, we propose an intermediate filtration device. Utility Model Content

[0004] In view of the problems of existing intermediate filtration devices, such as easy clogging of the filter screen, the need for frequent shutdown for cleaning, low solid-liquid separation efficiency, and high intermediate residue rate, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: An intermediate filtration device includes a filter tank, wherein a feed inlet is connected to the top of the filter tank and a drain outlet is connected to the bottom of the filter tank. An inner pipe is coaxially installed inside the filter tank, and the feed inlet is connected to the inner pipe. The lower section of the inner pipe has inner filter holes arranged in a circumferential array on its outer surface. An outer pipe is coaxially installed inside the filter tank and surrounds the outer side of the inner pipe. The lower outer surface of the outer pipe has external filter holes arranged in a circumferential array, and the diameter of the external filter holes is smaller than that of the inner filter holes. A slag discharge cover is installed on the slag discharge channel at the bottom of the filter tank via a sealing element, and is also installed on the inner pipe and the outer pipe via a sealing element. Vibration generators arranged in a circumferential array are installed on the slag discharge cover.

[0006] As a technical solution of the intermediate filtration device of this utility model, a spiral guide vane is installed on the inner wall of the upper section of the inner pipe, and the spiral angle of the spiral guide vane gradually decreases along the flow direction.

[0007] As a technical solution of the intermediate filtration device of this utility model, the surface of the spiral guide plate is provided with an anti-crystallization coating, and the anti-crystallization coating is made of polytetrafluoroethylene.

[0008] As a technical solution of the intermediate filter device of this utility model, the top of the slag discharge cover has an integrally formed inner sealing ring and an outer sealing ring that are adapted to the inner pipe and the outer pipe respectively, and a sealing ring groove is opened on the outer surface of the slag discharge cover.

[0009] As a technical solution of the intermediate filter device of this utility model, the bottom of the slag discharge cover is equipped with a handle for applying force.

[0010] As a technical solution of the intermediate filter device of this utility model, the sealing element includes a first sealing ring installed on the inner sealing convex ring, a second sealing ring installed on the outer sealing convex ring, and a third sealing ring installed on the sealing ring groove.

[0011] As a technical solution of the intermediate filtering device of this utility model, the frequency of the vibration generator is 20-50Hz.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model uses a two-stage filtration structure of coarse filtration in the inner pipeline and fine filtration in the outer pipeline to intercept solid particles in stages. Combined with spiral guide vanes to optimize fluid distribution, it significantly reduces the residual rate of intermediates. At the same time, the combination of a vibration generator for active anti-clogging and an anti-crystallization coating for passive anti-adhesion provides dual protection for continuous operation stability and can reduce the number of downtime maintenance.

[0013] 2. This utility model integrates vibration cleaning function through modular slag discharge cover, and achieves quick opening and slag cleaning with handle design. At the same time, combined with multi-stage sealing ring structure, it can ensure sealing reliability under high pressure conditions to avoid leakage risk. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of 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. Among them: Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the overall half-section structure of this utility model.

[0016] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0017] Figure 4 This is an exploded structural diagram of the slag discharge cover and sealing element of this utility model.

[0018] Explanation of reference numerals in the attached figures: In the diagram: 1. Filter tank; 101. Feed inlet; 102. Drain outlet; 2. Inner pipe; 201. Spiral guide vane; 202. Inner filter hole; 3. Outer pipe; 301. Outer filter hole; 4. Slag discharge cover; 401. Inner sealing ring; 402. Outer sealing ring; 403. Sealing ring groove; 404. Handle; 501. First sealing ring; 502. Second sealing ring; 503. Third sealing ring; 6. Vibration generator. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Reference Figures 1-4 An intermediate filtration device is provided, which includes a filter tank 1. The filter tank 1 is made of 316L stainless steel, which is corrosion resistant and suitable for high pressure environments. A feed inlet 101 is installed on the top of the filter tank 1, and a drain outlet 102 is installed on the bottom of the filter tank 1. The inner pipe 2 is coaxially installed inside the filter tank 1, and the feed inlet 101 is connected to the inner pipe 2. The lower section of the inner pipe 2 has inner filter holes 202 arranged in a circumferential array on its outer surface. The outer pipe 3 is coaxially installed inside the filter tank 1 and surrounds the outer side of the inner pipe 2. The lower section of the outer pipe 3 has an outer filter hole 301 arranged in a circumferential array on its outer surface, and the diameter of the outer filter hole 301 is smaller than the diameter of the inner filter hole 202. The slag discharge cover 4 is installed on the slag discharge channel at the bottom of the filter tank 1 via a sealing element, and is also installed on the inner pipe 2 and the outer pipe 3 via a sealing element. The slag discharge cover 4 is further secured with bolts. The slag discharge cover 4 is equipped with a vibration generator 6 arranged in a circumferential array. The vibration generator 6 has a frequency of 20-50Hz. In application, the nested structure of the inner pipe 2 (coarse filtration) and the outer pipe 3 (fine filtration) can significantly improve the solid-liquid separation efficiency and reduce intermediate residue through graded filtration with different pore sizes (inner filter hole 202 > outer filter hole 301). The vibration generator 6 (20-50Hz) on the slag discharge cover 4 can periodically loosen the filter residue to avoid clogging of the filter holes (inner filter hole 202, outer filter hole 301) and reduce the frequency of downtime for cleaning. The slag discharge cover 4 seals the filter tank 1, the inner pipe 2 and the outer pipe 3 at the same time, which can realize quick opening and slag removal, and facilitate maintenance.

[0021] Reference Figure 2 A spiral guide vane 201 is installed on the inner wall of the upper section of the inner pipe 2, and the spiral angle of the spiral guide vane 201 gradually decreases along the flow direction. In application, the spiral guide vane 201 guides the fluid to flow smoothly downward by gradually decreasing the spiral angle, reducing turbulence and bubble generation, and improving filtration uniformity.

[0022] Reference Figure 2 The surface of the spiral guide vane 201 is provided with an anti-crystallization coating (thickness 0.1mm-0.3mm), and the anti-crystallization coating is made of polytetrafluoroethylene. In application, the polytetrafluoroethylene coating prevents crystals from depositing on the surface of the spiral guide vane 201, reducing the risk of blockage and extending the cleaning cycle.

[0023] Reference Figures 2-4 The top of the slag discharge cover 4 has an integrally formed inner sealing ring 401 and an outer sealing ring 402 that are adapted to the inner pipe 2 and the outer pipe 3, respectively. The outer surface of the slag discharge cover 4 has a sealing ring groove 403. The bottom of the slag discharge cover 4 is equipped with a handle 404 for applying force. The sealing components include a first sealing ring 501 (made of fluororubber) installed on the inner sealing ring 401, a second sealing ring 502 (made of fluororubber) installed on the outer sealing ring 402, and a third sealing ring 503 (made of silicone) installed on the sealing ring groove 403. In application, the inner sealing ring 401, the outer sealing ring 402, and the sealing ring groove 403 work together with multiple sets of sealing rings (first sealing ring 501, second sealing ring 502, and third sealing ring 503) to ensure the tightness between the slag discharge cover 4 and the filter tank 1, the inner pipe 2, and the outer pipe 3, and to prevent leakage. At the same time, the design of the bottom handle 404 facilitates the opening and closing of the slag discharge cover 4 and improves maintenance efficiency.

[0024] The working principle of this utility model is as follows: Start-up preparation: Confirm that the triple sealing rings (first sealing ring 501, second sealing ring 502 and third sealing ring 503) of the slag discharge cover 4 are undamaged, the sealing ring groove 403 is free of impurities, and start the vibration generator 6 to run under no-load to check the frequency stability (default 30Hz). Filtration operation: Feeding: The intermediate mixture enters the inner pipe 2 through the feed port 101, and is guided by the spiral guide vane 201 to form a swirling flow, reducing turbulence; Two-stage filtration: Coarse filtration: Liquid passes through the large-diameter internal filter holes 202 of the inner pipe 2, intercepting larger solid particles; Fine filtration: After the liquid enters the external pipe 3, it is further separated into fine particles through the small-diameter external filter hole 301; Drainage: The filtrate is discharged from the bottom drain port 102, and the clarity of the discharged liquid is monitored in real time using external equipment; Slag Removal and Maintenance: Vibration Slag Removal: After filtration is completed, start the vibration generator 6 and vibrate for a period of time (30-60 seconds) to loosen the filter residue attached to the filter holes (inner filter hole 202, outer filter hole 301); Open the cover and clean the slag: Stop feeding, pull down the slag discharge cover 4 using handle 404, and remove the filter slag at the bottom of the filter tank 1, inner pipe 2 and outer pipe 3. At the same time, check whether the filter holes (inner filter hole 202 and outer filter hole 301) are blocked. Cleaning and Coating Maintenance: Backflush the filter holes (inner filter hole 202, outer filter hole 301) with low-pressure clean water, and re-coat the polytetrafluoroethylene layer every period of use (50 times) or when wear is found on the coating of the spiral guide plate 201.

[0025] Maintenance during shutdown: Before long-term shutdown, the liquid in filter tank 1 should be drained, the slag discharge cover 4 should be removed and the sealing rings (first sealing ring 501, second sealing ring 502 and third sealing ring 503) should be dried, and the vibration generator 6 should be powered on and tested monthly to prevent component aging.

[0026] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An intermediate filtering device, characterized in that: include: A filter tank (1) is provided with a feed inlet (101) at the top and a drain outlet (102) at the bottom. The inner pipe (2) is coaxially installed inside the filter tank (1), and the feed inlet (101) is connected to the inner pipe (2). The lower section of the inner pipe (2) has an inner filter hole (202) arranged in a circular array on its outer surface. An outer pipe (3) is coaxially installed inside the filter tank (1) and surrounds the outer side of the inner pipe (2). The lower outer surface of the outer pipe (3) is provided with an outer filter hole (301) arranged in a circumferential array, and the diameter of the outer filter hole (301) is smaller than the diameter of the inner filter hole (202). The slag discharge cover (4) is installed on the slag discharge channel at the bottom of the filter tank (1) by means of a sealing element, and is also installed on the inner pipe (2) and the outer pipe (3) by means of a sealing element. The slag discharge cover (4) is equipped with a vibration generator (6) arranged in a circumferential array.

2. The intermediate filtering device according to claim 1, characterized in that: A spiral guide vane (201) is installed on the inner wall of the upper section of the inner pipe (2), and the spiral angle of the spiral guide vane (201) gradually decreases along the flow direction.

3. The intermediate filtering device according to claim 2, characterized in that: The surface of the spiral guide vane (201) is provided with an anti-crystallization coating, and the anti-crystallization coating is made of polytetrafluoroethylene.

4. The intermediate filtering device according to claim 1, characterized in that: The top of the slag discharge cover (4) has an integrally formed inner sealing ring (401) and an outer sealing ring (402) that are adapted to the inner pipe (2) and the outer pipe (3) respectively. The outer surface of the slag discharge cover (4) is provided with a sealing ring groove (403).

5. The intermediate filtering device according to claim 4, characterized in that: The bottom of the slag discharge cover (4) is equipped with a handle (404) for applying force.

6. The intermediate filtering device according to claim 4, characterized in that: The sealing element includes a first sealing ring (501) mounted on the inner sealing convex ring (401), a second sealing ring (502) mounted on the outer sealing convex ring (402), and a third sealing ring (503) mounted on the sealing ring groove (403).

7. The intermediate filtration device according to any one of claims 1-6, characterized in that: The frequency of the vibration generator (6) is 20-50Hz.

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