A drying condenser filter

Abstract

The utility model provides a kind of drying condensing filter, including condensing component for condensing steam;Along steam conveying direction, the pretreatment component being located in the upstream of the condensing component and being communicated with it, including the separator for intercepting large particle impurities and the first filter structure for further intercepting the fine diameter impurities escaped from the separator;And, along the condensate flow direction, the terminal filter component being located in the downstream of the condensing component is provided.The application, by the hierarchical cooperation of pretreatment component and terminal filter component, the pretreatment component removes most of the impurities in steam, the terminal filter component deeply purifies condensate, ensures the water quality of recovered condensate water, maintains the stable operation of steam system, indirectly ensures the temperature stability of polyester particle drying, protects the condensing component from the wear and tear and fouling of impurities.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical fiber production, and in particular to a drying and condensing filter. Background Technology

[0002] In the process of chemical fiber production, the crushed polyester particles need to be dried to remove the moisture before they can be extruded into fibers. This process usually requires the use of high-temperature, high-pressure steam to transfer heat to the drying equipment. The steam releases heat to form condensate, which is then recovered, heated back to form steam, and then released back into the drying chamber.

[0003] However, the steam system itself may contain impurities, such as rust residue flowing through the pipes, corrosion products on the inner walls, and debris from worn valve seals. These impurities will enter the heat exchanger with the steam and eventually mix with the condensate. Simultaneously, after prolonged use, indirect heating equipment may experience inner wall detachment, aging seals, and leaks, leading to small amounts of solid impurities entering the condensate. If the condensate is directly recycled and reused, such as by feeding it back into the boiler, impurities will accumulate in the pipes of the heating and drying equipment, causing scaling, corrosion, and even affecting steam quality, indirectly impairing the drying effect of the polyester granules.

[0004] Therefore, this application provides a drying condensate filter that can remove solid particles from condensate to avoid clogging of recovery pipes and equipment, reduce the risk of scaling in subsequent heating equipment, lower maintenance costs, and extend equipment lifespan. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a drying condensate filter that can remove solid particles from condensate to avoid clogging of recovery pipes and equipment and reduce the risk of scaling in subsequent heating equipment.

[0006] To achieve the above and other related objectives, this utility model provides the following technical solution: A drying condenser filter includes a condenser assembly for condensing steam; a pretreatment assembly located upstream of and connected to the condenser assembly along the steam conveying direction, comprising a separator for intercepting large particulate impurities and a first filter structure for further intercepting fine impurities escaping from the separator; the first filter structure includes a lower chamber and an upper chamber arranged sequentially along the steam conveying direction, and a filter module located between and connecting the two; pressure sensors are installed in both the upper chamber and the lower chamber to monitor the pressure difference between the two after passing through the filter module. And, along the direction of condensate flow, a terminal filter assembly located downstream of the condensation assembly.

[0007] To achieve the above technical solution, the pretreatment component and the terminal filtration component work together in a tiered manner. The pretreatment component removes most of the impurities from the steam, while the terminal filtration component deeply purifies the condensate, ensuring the quality of the recovered condensate and maintaining the stable operation of the steam system. This indirectly ensures the temperature stability of the polyester granule drying process and protects the condensation component from wear and scaling caused by impurities. The steam from the separator is processed by the first filtration structure, entering from the lower chamber. Larger particles continue to settle downwards due to gravity, while the remaining fine particles move upwards with the steam and pass through the filtration module, reducing the load on the filtration module. A pressure sensor monitors the pressure difference across the filter bag in real time, allowing technicians to promptly clean or replace the filter bag, ensuring the stable operation of the entire condensation filtration process.

[0008] Furthermore, the separator includes a conical cylinder with an outer diameter that gradually decreases in the vertical direction, a tangential inlet arranged along the tangential direction of the outer circumferential surface of the conical cylinder, and an exhaust port that is perpendicularly arranged on the top surface of the conical cylinder and communicates with the first filter structure.

[0009] To achieve the above technical solution, the conical cylinder design allows the steam to use centrifugal force to throw impurities against the cylinder wall and separate them from the steam, significantly reducing the load on the subsequent first filtration structure.

[0010] Furthermore, the tangential inlet, the inner cavity of the conical cylinder, and the exhaust port are sequentially connected and configured as a steam passage.

[0011] The above technical solution achieves this by using a smooth steam channel, which allows the steam to separate impurities while flowing smoothly, avoiding a decrease in flow rate and premature condensation.

[0012] Furthermore, the separator also includes a slag collection box that is detachably mounted on the bottom surface of the conical cylinder and positioned opposite the exhaust port.

[0013] The above technical solution achieves the goal of collecting impurities intercepted by the separator through a slag collection box, preventing them from entering the subsequent condensation and filtration processes with the steam and thus preventing secondary pollution.

[0014] Furthermore, the filtration module includes several filter bags for filtering impurities in the steam transmitted from the exhaust port, a mounting plate for mounting the filter bags, and soot blowing nozzles positioned toward the filter bags.

[0015] To achieve the above technical solution, the filter bag is periodically and directionally blew by a soot blowing nozzle, causing the lint adhering to the surface of the filter bag to detach in a low-polymer state, thus avoiding the blockage of the filter bag pores and the resulting increase in steam flow resistance. At the same time, the frequency of filter bag replacement is reduced, thereby lowering maintenance costs.

[0016] Furthermore, the terminal filtration assembly includes a precision filter layer and an activated carbon filter layer nested sequentially from the inside out.

[0017] The above technical solution achieves deep purification of condensate through multi-layer and graded filtration. At the same time, the multi-layer nested structure shortens the condensate flow path, improves filtration efficiency, and reduces the floor space of the filter unit, adapting to the compact layout requirements of industrial production lines.

[0018] Furthermore, both the separator and the first filter structure are covered with an insulation layer.

[0019] The above technical solution, through the setting of the insulation layer, can effectively prevent steam from condensing prematurely before the condensation process and prevent impurities from scaling on the walls of the separator and the first filter structure, thereby reducing the separation efficiency of steam in the separation process and clogging the filter bag pores, resulting in a sudden increase in resistance, failure of dust removal, or even damage to the filter bag.

[0020] As described above, the drying and condensing filter of this utility model has the following beneficial effects: 1. In this application, through the graded synergy of the pretreatment component and the terminal filter component, the pretreatment component removes most of the impurities in the steam, and the terminal filter component deeply purifies the condensate, ensuring the water quality of the recovered condensate, maintaining the stable operation of the steam system, indirectly ensuring the temperature stability of the polyester particle drying, and protecting the condensation component from wear and scaling caused by impurities.

[0021] 2. In this application, the design of the conical cylinder allows the steam to use centrifugal force to throw impurities against the cylinder wall and separate them from the steam, thereby reducing the load on the subsequent first filtration structure. Attached Figure Description

[0022] Figure 1 The diagram shown is a structural schematic of a drying and condensing filter according to this utility model.

[0023] Figure 2 The diagram shown is a structural schematic of the separator in this utility model.

[0024] Figure 3 The image shown is a cross-sectional view of the first filter structure in this invention.

[0025] Figure 4 The image shown is a cross-sectional view of the terminal filtering component in this invention.

[0026] Among them, 1. Condensation component; 11. Heat exchange pipe; 12. Shell; 13. Receiving cavity; 2. Pretreatment component; 21. Separator; 211. Conical cylinder; 212. Tangential inlet; 213. Exhaust port; 214. Slag collection box; 22. First filter structure; 221. Lower box; 222. Upper box; 223. Filter module; 2231. Filter bag; 2232. Mounting plate; 2233. Soot blowing nozzle; 3. Terminal filter component; 31. Precision filter layer; 32. Activated carbon filter layer. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] Please see Figure 1-4 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0029] Please see Figures 1 to 4 This utility model provides a drying and condensing filter, including a pretreatment component 2, a condensing component 1, and a terminal treatment component arranged sequentially along the direction of steam conveying and condensation.

[0030] The pretreatment component 2 is located upstream of the condensation component 1, and includes a separator 21 and a first filter structure 22 connected to each other. The separator 21, located upstream of the first filter structure 22, includes a conical cylinder 211 with a gradually decreasing outer diameter in the vertical direction, a tangential inlet 212 on the conical cylinder 211, and an exhaust port 213 for discharging steam from the conical cylinder 211. The tangential inlet 212, the conical cylinder 211, and the exhaust port 213 are sequentially connected and configured as a steam channel. The separator 21 uses centrifugal force to throw out denser dust or impurities from the steam, achieving the separation of impurities from steam. The first filter structure 22 further intercepts fine impurities escaping from the separator 21, preventing them from settling and forming scale on the low-temperature condensation surface during subsequent condensation processes, which could ultimately cause blockage inside the condensation component 1.

[0031] Furthermore, along the condensate flow direction, the terminal filter assembly 3 is located downstream of the condensation assembly 1. It includes a precision filter layer 31 and an activated carbon filter layer 32, sequentially arranged from the inside out. The precision filter layer 31 is a PP cotton filter element, used to remove fine solid impurities suspended in the condensate formed after the steam passes through the condensation process, preventing them from clogging the subsequent activated carbon filter layer 32; while the activated carbon filter layer 32 is coal-based activated carbon, used to adsorb harmful organic matter generated during steam heating, ensuring the quality of the recovered condensate, maintaining the stable operation of the steam system, or ensuring that the recovered condensate meets emission standards.

[0032] In addition, the condensing assembly 1 includes a heat exchange pipe through which refrigerant circulates and a receiving cavity 13 enclosed by the shell 12 to contain and condense steam. The two ends of the receiving cavity 13 are respectively connected to the first filter structure 22 and the terminal filter assembly 3 through pipes.

[0033] In this application, through the graded synergy of the pretreatment component 2 and the terminal filter component 3, the pretreatment component 2 removes most of the impurities in the steam, and the terminal filter component 3 deeply purifies the condensate, protecting the condenser component 1 from wear and scaling caused by impurities.

[0034] Please continue reading. Figure 1 and Figure 2 The axis of the tangential inlet 212 is collinear with the tangent of the cross section of the outer circumferential surface at the connection position of the conical cylinder 211, and the exhaust port 213 is located on the top surface of the conical cylinder 211.

[0035] Specifically, steam is conveyed from the self-drying equipment toward the separator 21 and enters the conical cylinder 211 through the tangential inlet 212. It maintains a stable spiral downward motion inside the conical cylinder 211. Impurities are thrown toward the cylinder wall due to inertia, while the steam experiences less centrifugal force and flows along the central area. As the diameter of the conical cylinder 211 gradually decreases, the channel for the spiral downward airflow gradually narrows, the rotation speed increases, and impurities are captured a second time. Subsequently, the steam changes its flow direction at the bottom of the conical cylinder 211, rises and is discharged along the exhaust pipe, and enters the subsequent first filtration structure 22.

[0036] In an alternative embodiment, since the steam velocity from the drying equipment is 15-25 m / s and the pressure is 0.2-1.0 MPa, and a large volume of steam is being processed, a conventional separator can be selected to balance low resistance and separation efficiency. Of course, this application does not limit the type of separator; a long cone separator can also be used, although it has higher resistance, but it can further improve separation efficiency.

[0037] Please continue reading. Figure 1 The separator 21 also includes a slag collection box 214.

[0038] The slag collection box 214 and the exhaust port 213 are located opposite each other at the bottom of the conical cylinder 211. The slag collection box 214 and the conical cylinder 211 are detachably connected to each other to collect impurities separated from the steam.

[0039] Specifically, the bottom of the slag collection box 214 and the conical cylinder 211 are connected by a snap-fit, which makes it convenient for technicians to disassemble and clean the slag. A sealing ring is also fitted at the connection between the two to ensure the sealing of the separator 21.

[0040] Please continue reading. Figure 3 The first filter structure 22 includes a lower housing 221, an upper housing 222, and a filter module 223 for connecting the two, arranged sequentially along the steam conveying direction.

[0041] Steam from separator 21 enters the first filter structure 22 through the lower housing 221. Larger particles continue to settle downwards due to gravity, while the remaining fine particles move upwards with the steam and pass through the filter module 223, reducing the load on the filter module 223. Preferably, the steam from separator 21 should avoid directly impacting the filter module 223.

[0042] The clean steam passing through the filter module 223 is collected on the upper housing 222, discharged through the outlet, and then enters the subsequent condenser assembly 1.

[0043] Please continue reading. Figure 3 The filter module 223 is used to filter the steam flowing from the lower chamber 221 to the upper chamber 222. It includes several filter bags 2231 for intercepting impurities in the steam, a mounting plate 2232 for mounting the filter bags 2231, and a soot blowing nozzle 2233 facing the filter bags 2231.

[0044] Among them, the filter bag 2231 is made of high temperature resistant PTEE material, with an embedded metal skeleton to support the filter bag 2231 and prevent it from collapsing. The pore size of the filter bag 2231 is less than 5μm, and the air permeability is controlled at 1-3㎡ / (㎡·min).

[0045] Furthermore, impurities tend to adhere to the surface of the filter bag 2231, requiring the soot blowing nozzle 2233 to periodically blow soot onto the filter bag 2231 to prevent the formation of hard scale on the filter bag 2231.

[0046] In this application, the synergistic effect between the separator 21 and the first filter structure 22 is used to form a more complete pretreatment process before the condensation process, so that the steam is sufficiently filtered before condensation, avoiding the deposition and scaling of impurities in the steam in the condensation component 1, which would eventually lead to the blockage of the condensation component 1.

[0047] Preferably, pressure sensors are installed in the lower housing 221 and the upper housing 222 to detect the pressure difference of steam before and after passing through the filter module 223. If the pressure difference is too large, it indicates that the filter bag 2231 is severely clogged and needs to be cleaned or replaced.

[0048] The design of the pressure sensor can effectively help technicians understand the clogging status of the filter module in the first filter structure 22, and clean and replace the filter bag 2231 in a timely manner to avoid the shutdown caused by the clogging of the filter module 223.

[0049] It should be noted that both the separator 21 and the first filter structure 22 are covered with an insulation layer on their outer sides.

[0050] Specifically, the insulation layer is made of rock wool or polyurethane. By setting the insulation layer, it can effectively prevent steam from condensing in advance before the condensation process, so that impurities will form scale on the walls of the separator 21 and the first filter structure 22, thereby reducing the separation efficiency of steam in the separation process and clogging the filter pores of the filter bag 2231, resulting in a sudden increase in resistance, failure of dust removal, or even damage to the filter bag 2231.

[0051] Preferably, the pipes connecting the drying device and the separator 21 should also be covered with an insulation layer to better prevent premature condensation of steam.

[0052] The implementation principle of the drying and condensing filter in this utility model is as follows: The mixed steam discharged from the polyester vacuum drum dryer enters the pretreatment component 2 through the gas pipeline with a heat insulation layer. At the same time, the technicians control the steam flow rate to avoid sudden changes in flow rate that could cause local condensation. Subsequently, the steam containing fine particles enters the conical cylinder 211 from the tangential inlet 212 and forms a descending vortex under the guidance of the cylinder wall. Large particles of impurities enter the slag collection box 214 along the cylinder wall due to centrifugal force, and are further separated by the narrowing and accelerated airflow as the airflow descends. The separated steam then enters the first filter structure 22 through the exhaust port 213. The steam flows from the bottom... After entering the chamber 221, the steam passes through the filter bag 2231, where fine particles are intercepted and captured. Subsequently, the clean steam gathers in the upper chamber 222 and enters the shell 12 of the condenser assembly 1, where it exchanges heat with the condensing medium in the heat exchange pipe 11, causing the temperature to drop and condense on the outer wall of the heat exchange pipe 11. Then, the condensate generated after the steam condenses enters from the top of the terminal filter assembly 3 and flows through the precision filter layer 31 and the activated carbon filter layer 32 once for condensation and filtration. Finally, the entire condensation and filtration process is completed, and the condensate meets the standard for recycling and is recycled and reheated into steam to transfer heat to the drying chamber.

[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A drying and condensing filter, characterized in that, include: A condenser assembly (1) for condensing steam; Along the steam conveying direction, a pretreatment component (2) located upstream of and connected to the condensing component (1) includes a separator (21) for intercepting large particulate impurities and a first filter structure (22) for further intercepting fine impurities escaping from the separator (21); the first filter structure (22) includes a lower housing (221) and an upper housing (222) arranged sequentially along the steam conveying direction, and a filter module (223) located between the two and connecting them; pressure sensors are installed in both the lower housing (221) and the upper housing (222) to monitor the pressure difference between the two after passing through the filter module (223); And, along the condensate flow direction, a terminal filter assembly (3) is provided downstream of the condensation assembly (1).

2. The drying and condensing filter according to claim 1, characterized in that, The separator (21) includes a conical cylinder (211) whose outer diameter gradually decreases in the vertical direction, a tangential inlet (212) arranged along the tangential direction of the outer circumferential surface of the conical cylinder (211), and an exhaust port (213) that is perpendicularly arranged on the top surface of the conical cylinder (211) and communicates with the first filter structure (22).

3. The drying and condensing filter according to claim 2, characterized in that, The tangential inlet (212), the inner cavity of the conical cylinder (211), and the exhaust port (213) are sequentially connected and configured as a steam passage.

4. The drying and condensing filter according to claim 2, characterized in that, The separator (21) also includes a slag collection box (214) that is detachably mounted on the bottom surface of the conical cylinder (211) and is disposed opposite to the exhaust port (213).

5. The drying and condensing filter according to claim 1, characterized in that, The filter module (223) includes several filter bags (2231) for filtering impurities in the steam transmitted from the exhaust port (213), a mounting plate (2232) for mounting the filter bags (2231), and a soot blowing nozzle (2233) facing the filter bags (2231).

6. The drying and condensing filter according to claim 1, characterized in that, The terminal filter assembly (3) includes a precision filter layer (31) and an activated carbon filter layer (32) sequentially arranged from the inside out.

7. The drying and condensing filter according to claim 1, characterized in that, Both the separator (21) and the first filter structure (22) are covered with a heat insulation layer.

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