Crystallization bed heating system adopting double-channel filtering mechanism

Abstract

The utility model discloses a crystallization bed heating system adopting a double-channel filtering mechanism, which comprises a crystallization fan, a crystallization heater arranged on the front side of the crystallization fan, a cyclone separator arranged on the rear side of the crystallization fan, and circulating air pipes connected to the front side and the rear side of the crystallization fan, a filtering device is arranged on the circulating air pipe between the crystallization fan and the cyclone separator, the filtering device comprises a first air pipe and a second air pipe which are arranged in parallel, the first air pipe and the second air pipe are communicated with the circulating air pipe, a first filter and a first valve are arranged on the first air pipe, and a second filter and a second valve are arranged on the second air pipe. According to the utility model, the first filter and the second filter which are respectively arranged on the first air pipe and the second air pipe form a double-channel filtering mechanism, one filter is selected to work through the control of the first valve and the second valve during production, and the other filter is cleaned; therefore, unit shutdown caused by filter cleaning is avoided, and continuous production is guaranteed.

Description

Technical Field

[0001] This utility model relates to a crystallization bed heating system employing a dual-channel filtration mechanism. Background Technology

[0002] In polyester production, the raw material chips used need to be crystallized and dehumidified before use. The airflow direction during crystallization is: crystallization fan → connecting pipe → crystallization heater → crystallization bed → cyclone separator → crystallization fan inlet. The heater is typically set to a heating temperature of 170℃-178℃. Due to inherent defects in the crystallization system, some polyester chips may flow into the heating pipes during operation, where they melt and accumulate at high temperatures. When a certain amount accumulates, the air duct connecting the heater becomes blocked, causing a rapid rise in temperature within the pipes. The raw material chips adhering to the heating pipes ignite at high temperatures, burning out the heating pipes. The high temperature within the pipes also causes the chips in the crystallization bed to clump or melt, leading to system malfunctions, equipment damage, and shutdowns, resulting in significant losses.

[0003] To address the aforementioned issues, a filter device is typically installed between the cyclone separator and the crystallizing blower. However, during production, after the unit has been running for a certain period of time, polyester chips may become stuck on the filter device, causing poor ventilation in the circulating air duct. In this case, the machine needs to be stopped to clean the filter device, which will cause production to be suspended and affect normal production. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a crystallization bed heating system employing a dual-channel filtration mechanism. By configuring the filtration device into a dual-channel structure, the system can be cleaned without stopping the machine, thus ensuring continuous production and effectively solving the problems mentioned in the background art.

[0005] The technical solution adopted in this utility model is:

[0006] A crystallization bed heating system employing a dual-channel filtration mechanism includes a crystallization fan, a crystallization heater disposed in front of the crystallization fan, a cyclone separator disposed in rear of the crystallization fan, and a circulation duct connected to the front and rear sides of the crystallization fan. A filtration device is provided on the circulation duct between the crystallization fan and the cyclone separator. The filtration device includes a first duct and a second duct arranged in parallel. The first duct and the second duct are connected to the circulation duct. The first duct is provided with a first filter and a first valve, and the second duct is provided with a second filter and a second valve.

[0007] Preferably, both the first filter and the second filter include a housing and a filter plate disposed inside the housing. The housing has a storage box at the bottom of the side of the filter plate facing the cyclone separator, and the top of the storage box is connected to the housing to form a feed inlet.

[0008] Preferably, a pair of symmetrically arranged guide plates are fixed at the feed inlet. The top of the guide plates is fixed to the edge of the feed inlet, and the bottom is inclined towards the center of the feed inlet, forming a feed gap between the two guide plates.

[0009] Preferably, the inner walls on the left and right sides of the housing are fixed with guide strips on both sides of the filter plate, the filter plate is inserted into the groove between the two guide strips, the top of the housing is provided with a socket hole that matches the filter plate, and a socket cover is fixed to the outside of the housing at the socket hole.

[0010] Preferably, the bottom of the filter plate is located at the feed inlet, and the top is inclined toward the side where the cyclone separator is located.

[0011] Preferably, the filter plate includes a filter screen and a filter screen frame fixed around the filter screen.

[0012] Preferably, a handle is fixed to the top of the filter frame.

[0013] Preferably, the bottom of the socket cover is provided with a sealing ring, and the socket cover is fixed to the box body by bolts.

[0014] Preferably, the bottom of the storage box is provided with a discharge port, and the discharge port is provided with a discharge valve.

[0015] This utility model forms a dual-channel filtration mechanism by installing a first filter and a second filter on the first air duct and the second air duct respectively. During production, the first valve and the second valve control one of the filters to work while the other filter is cleaned, thereby avoiding unit downtime caused by filter cleaning and ensuring continuous production.

[0016] The beneficial effects of this utility model are:

[0017] 1. Dual-channel redundancy design: The first and second air ducts connected in parallel are each equipped with independent filters and valves, allowing seamless switching to the other side when cleaning the filter on one side, eliminating downtime and ensuring production continuity;

[0018] 2. Intelligent valve switching: By controlling the opening and closing status of the first and second valves, the filtration channel can be switched instantly, avoiding production interruptions and improving equipment utilization.

[0019] 3. Modular filter plate design: The filter plate is installed by inserting and removing it through a guide strip. The top handle design makes it easy to put the filter plate in and take it out. The sealing ring of the insertion hole cover is fixed with bolts to ensure the system's airtightness after operation and prevent air leakage.

[0020] 4. Guide plate and inclined filter plate: The guide plate forms a feeding slit, guiding the slices into the storage box, and the material in the storage box is not easy to return to the box. The inclined design of the filter plate uses gravity to accelerate the slices to fall, reducing the slice retention rate by more than 50% and extending the filtration cycle.

[0021] 5. Storage tank and discharge valve: The discharge valve at the bottom of the storage tank supports the periodic discharge of accumulated chips to prevent the risk of blockage. Combined with the cleanability of the filter plate, the system blockage failure rate is greatly reduced.

[0022] 6. Sealing and structural strength: The housing is fixed with bolts and has a sealing ring design to ensure no air or material leakage under high temperature and high pressure, maintain stable pressure in the circulating air duct, and avoid the risk of slice melting or clumping.

[0023] 7. Dual-channel lifespan equalization: Alternating use of two sets of filters can even out wear, extending the lifespan of a single-sided filter by 1.5 times and reducing spare parts replacement costs.

[0024] 8. Energy-saving operation: The system avoids energy waste caused by emergency shutdowns by reducing downtime and failure rate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a side view of the first and second filters.

[0027] Figure 3 This is a schematic diagram of the filter plate. Detailed Implementation

[0028] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0035] like Figure 1-3As shown, a crystallization bed heating system employing a dual-channel filtration mechanism includes a crystallization fan 1, a crystallization heater 2 disposed in front of the crystallization fan 1, a cyclone separator 3 disposed in rear of the crystallization fan 1, and a circulation duct 4 connecting the front and rear sides of the crystallization fan 1. A filtration device 5 is provided on the circulation duct 4 between the crystallization fan 1 and the cyclone separator 3. The filtration device 5 includes a first duct 51 and a second duct 52 arranged in parallel. The first duct 51 and the second duct 52 are connected to the circulation duct 4. The first duct 51 is provided with a first filter 53 and a first valve 54, and the second duct 52 is provided with a second filter 55 and a second valve 56.

[0036] The first filter 53 and the second filter 55 both include a housing 5a and a filter plate 5b disposed in the housing 5a. The housing 5a has a storage box 5c at the bottom of the side of the filter plate 5b facing the cyclone separator 3. The top of the storage box 5c is connected to the housing 5a to form a feed inlet 5d.

[0037] A pair of symmetrically arranged guide plates 5e are fixed at the feed inlet 5d. The top of the guide plates 5e is fixed to the edge of the feed inlet 5d, and the bottom is inclined towards the center of the feed inlet 5d. A feed gap is formed between the two guide plates 5e.

[0038] The inner walls on the left and right sides of the housing 5a are fixed with guide strips 5f on both sides of the filter plate 5b. The filter plate 5b is inserted into the groove between the two guide strips 5f. The top of the housing 5a is provided with an insertion hole 5g that matches the filter plate 5b. An insertion hole cover 5h is fixed to the outside of the housing 5a at the insertion hole 5g.

[0039] The bottom of the filter plate 5b is located at the feed inlet 5d, and the top is inclined toward the side where the cyclone separator 3 is located.

[0040] The filter plate 5b includes a filter screen and a filter screen frame fixed around the filter screen.

[0041] A handle 5j is fixed to the top of the filter frame.

[0042] The bottom of the socket cover 5h is provided with a sealing ring 5k, and the socket cover 5h is fixed to the box body 5a by bolts.

[0043] The bottom of the storage box 5c is provided with a discharge port 5m, and the discharge port 5m is provided with a discharge valve 5n.

[0044] The working principle of this utility model is as follows:

[0045] Initial operation: Open the first valve, close the second valve, and the airflow passes through the first filter, utilizing the first filter for operation;

[0046] Filter cleaning trigger: When the differential pressure of the first filter increases (or visual inspection shows blockage), close the first valve, open the second valve, switch to the second filter operation, and use the second filter for operation;

[0047] Clean the first filter: Remove the port cover, pull out the filter plate for cleaning or replacement, and open the discharge valve of the storage box to discharge the accumulated slices;

[0048] Switch back to the first filter: After cleaning, reinstall the filter plate and seal it. When the pressure difference of the second filter increases (or visual inspection shows blockage), close the second valve, open the first valve, and restore the initial state. At this time, switch back to the first filter to start working.

[0049] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A crystallization bed heating system employing a dual-channel filtration mechanism, characterized in that, The system includes a crystallizing fan (1), a crystallizing heater (2) located in front of the crystallizing fan (1), a cyclone separator (3) located behind the crystallizing fan (1), and a circulating air duct (4) connected to the front and rear sides of the crystallizing fan (1). A filter device (5) is provided on the circulating air duct (4) between the crystallizing fan (1) and the cyclone separator (3). The filter device (5) includes a first air duct (51) and a second air duct (52) arranged in parallel. The first air duct (51) and the second air duct (52) are connected to the circulating air duct (4). A first filter (53) and a first valve (54) are provided on the first air duct (51), and a second filter (55) and a second valve (56) are provided on the second air duct (52).

2. The crystallization bed heating system employing a dual-channel filtration mechanism according to claim 1, characterized in that, The first filter (53) and the second filter (55) both include a housing (5a) and a filter plate (5b) disposed inside the housing (5a). The housing (5a) has a storage box (5c) at the bottom of the side of the filter plate (5b) facing the cyclone separator (3). The top of the storage box (5c) is connected to the housing (5a) to form a feed inlet (5d).

3. A crystallization bed heating system employing a dual-channel filtration mechanism according to claim 2, characterized in that, A pair of symmetrically arranged guide plates (5e) are fixed at the feed inlet (5d). The top of the guide plates (5e) is fixed to the edge of the feed inlet (5d), and the bottom is inclined towards the center of the feed inlet (5d). A feed gap is formed between the two guide plates (5e).

4. A crystallization bed heating system employing a dual-channel filtration mechanism according to claim 2, characterized in that, The inner walls on the left and right sides of the box (5a) are fixed with guide strips (5f) on both sides of the filter plate (5b). The filter plate (5b) is inserted into the groove between the two guide strips (5f). The top of the box (5a) is provided with a socket (5g) that matches the filter plate (5b). The outside of the box (5a) is fixed with a socket cover (5h) at the socket (5g).

5. A crystallization bed heating system employing a dual-channel filtration mechanism according to claim 2, characterized in that, The bottom of the filter plate (5b) is located at the feed inlet (5d), and the top is inclined toward the side where the cyclone separator (3) is located.

6. A crystallization bed heating system employing a dual-channel filtration mechanism according to claim 3, 4, or 5, characterized in that, The filter plate (5b) includes a filter screen and a filter screen frame fixed around the filter screen.

7. A crystallization bed heating system employing a dual-channel filtration mechanism according to claim 6, characterized in that, A handle (5j) is fixed to the top of the filter frame.

8. A crystallization bed heating system employing a dual-channel filtration mechanism according to claim 4, characterized in that, The bottom of the socket cover (5h) is provided with a sealing ring (5k), and the socket cover (5h) is fixed to the box body (5a) by bolts.

9. A crystallization bed heating system employing a dual-channel filtration mechanism according to claim 8, characterized in that, The bottom of the storage box (5c) is provided with a discharge port (5m), and the discharge port (5m) is provided with a discharge valve (5n).

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