Liquid filter with heat exchange function

Abstract

A liquid filter with a heat exchange function comprises a barrel, a filter element positioning assembly, a filter element, an upper cover, an overflow pipe and a heat exchange coil pipe, a heat exchange cavity is formed in the upper cover, the overflow pipe is longitudinally arranged in the middle of the heat exchange cavity, the lower end of the overflow pipe is communicated with a containing cavity of the barrel, and the heat exchange coil pipe is arranged in the heat exchange cavity and arranged on the outer side of the overflow pipe in a sleeving mode. The utility model has the advantages that: 1, the purposes of cooling and filtering are simultaneously realized in one filter, the structural layout is more compact, the occupied space is smaller, and the cost can be reduced; 2, the overflow pipe and the heat exchange coil pipe are arranged, so that the heat exchange cooling effect is good; and 3, part of particle impurities can be directly remained in the heat exchange cavity in an overflow manner, so that the service life of the filter element is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of filtration technology, specifically to a liquid filter with heat exchange function. Background Technology

[0002] The function of a filter is to remove suspended solids and particulate matter from water, thereby reducing turbidity and purifying the water. This reduces the generation of dirt, bacteria, algae, and corrosion in the system, ensuring the effectiveness of water purification and protecting the normal operation of other equipment in the system.

[0003] In some liquid filtration systems, in addition to filtering the liquid, it is also necessary to cool or heat the liquid. For example, in exhaust gas treatment systems, industrial exhaust gases often have high temperatures and contain a large number of particulate impurities. Therefore, a spray tower is often installed at the front end of the exhaust gas treatment process. By spraying water from a tank onto the exhaust gas, the sprayed water absorbs heat from the exhaust gas, achieving the purpose of cooling it, and also carries away a large number of particulate impurities. Afterward, the water passes through a filter and a cooler in sequence, and after filtration and cooling, it returns to the water tank, thus achieving water recycling, energy saving, and environmental protection.

[0004] However, conventional filters only have a filtration function and do not simultaneously provide heat exchange and cooling. Therefore, to achieve liquid cooling and filtration in sequence, a cooler and a filter often need to be installed sequentially in the liquid filtration system. Since the cooler and filter are two relatively independent devices, additional piping is required to connect them, which not only occupies a large amount of space but also increases costs. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides a liquid filter with heat exchange function.

[0006] The technical solution adopted in this utility model is: a liquid filter with heat exchange function, comprising:

[0007] A cylindrical body having a cavity open at the top, and an outlet channel connected to the cavity is provided at the bottom of the cylindrical body;

[0008] The filter element positioning assembly is located inside the cavity of the cylinder and is used for positioning and installing the filter element.

[0009] The filter element is set inside the cavity of the cylinder and is positioned and engaged with the filter element positioning assembly for liquid filtration.

[0010] The upper cover is located at the upper end of the cylinder, and the upper cover forms a heat exchange cavity. The upper cover is also provided with an inlet channel that communicates with the heat exchange cavity.

[0011] An overflow pipe is longitudinally arranged in the middle of the heat exchange chamber. The lower end of the overflow pipe is connected to the cavity of the cylinder, and the upper end of the overflow pipe is close to the top of the heat exchange chamber.

[0012] A heat exchange coil is installed inside the heat exchange cavity and sleeved on the outside of the overflow pipe. The main body of the heat exchange coil is slightly lower than the top of the overflow pipe, while the inlet and outlet ends of the heat exchange coil extend upward through the top of the heat exchange cavity and out of the heat exchange cavity.

[0013] During filtration, the liquid needs to be cooled by heat exchange in the heat exchange chamber and heat exchange coil before entering the cylinder and being filtered through the filter element. This achieves the purpose of cooling and filtration in one filter. Compared with the existing technology that sets up two separate coolers and filters, the structure is more compact, occupies less space, and reduces costs.

[0014] The heat exchange chamber and the cylinder cavity are connected by an overflow pipe. Therefore, when liquid flows into the heat exchange chamber through the inlet channel, it will only flow into the cylinder cavity through the overflow pipe when the liquid level in the heat exchange chamber is higher than the upper end of the overflow pipe. This ensures that the liquid in the heat exchange chamber always covers the main body of the heat exchange coil, thereby ensuring sufficient heat exchange between the heat exchange coil and the liquid. Furthermore, the spiral structure of the heat exchange coil itself can fill the heat exchange chamber to a greater extent, ensuring a sufficient heat exchange contact area and achieving an effective heat exchange and cooling effect.

[0015] In addition, some particulate impurities in the liquid can settle naturally under the influence of gravity. Therefore, when an overflow flow method is adopted, the settled particulate impurities will be directly left in the heat exchange chamber, thereby achieving a preliminary filtration effect. This reduces the particulate impurities flowing into the chamber with the liquid, thereby reducing the contaminants attached to the surface of the filter element and thus improving the service life of the filter element.

[0016] The top cover and the cylinder are fixedly connected by several circumferentially distributed bolts, ensuring a reliable connection between them. A sealing ring is also provided between the top cover and the cylinder to ensure a reliable seal. Two handles are symmetrically arranged on the outside of the top cover, making it easier to assemble and disassemble the top cover and the cylinder. This convenient assembly and disassembly facilitates the cleaning and maintenance of the filter.

[0017] The upper cover includes:

[0018] The cover has a heat exchange chamber with an opening at the lower end;

[0019] A base plate is provided at the lower end of the cover, and a central hole is formed in the center of the base plate;

[0020] The overflow pipe is fixedly connected to the center hole of the base plate and communicates with the center hole.

[0021] The overflow pipe and the base plate are integrated into one structure. The bottom of the cover has a positioning groove. The base plate is embedded in the positioning groove and is fixedly connected to the cover by several circumferentially distributed screws. The base plate can be easily removed from the cover, which facilitates the cleaning and maintenance of the heat exchange chamber.

[0022] The top cover is divided into two parts: the cover body and the bottom plate. During cleaning and maintenance, the bottom plate can be directly removed for cleaning, making it easier to clean the contaminants that remain in the heat exchange chamber due to sedimentation, resulting in a more thorough cleaning.

[0023] The filter element positioning assembly includes a disc, which is positioned near the bottom of the cavity. The disc divides the cavity into an inlet chamber and an outlet chamber. The disc has seven slots, which are vertically connected. Seven filter elements are positioned in the inlet chamber and inserted into each slot of the disc, maintaining a seal. The outlet channel is connected to the outlet chamber. Using a disc allows for the parallel installation of seven filter elements, significantly increasing the flow rate and meeting high-flow-rate filtration requirements.

[0024] In addition, the filter positioning assembly also includes:

[0025] The fastening rod has its lower end fixedly connected to the flower plate and its upper end has an external thread.

[0026] A pressure plate having a positioning hole corresponding to a fastening rod, the pressure plate being sleeved over the fastening rod through the positioning hole and positioned above the filter element;

[0027] The locking nut has a threaded engagement with the external thread at the upper end of the fastening rod. When the locking nut is tightened, it forces the pressure plate to press the filter element downward.

[0028] By tightening the nuts, pressure plates, and fastening rods, the filter element can be installed securely and reliably, while also facilitating its disassembly and assembly, and making subsequent cleaning and maintenance easier.

[0029] The beneficial effects of this utility model are:

[0030] 1. By forming a heat exchange chamber on the top cover and installing a heat exchange coil inside the heat exchange chamber, during filtration, the liquid needs to first pass through the heat exchange chamber and the heat exchange coil for heat exchange and cooling, and then enter the cylinder and be filtered through the filter element. This achieves the purpose of cooling and filtration in one filter. Compared with the existing technology that sets two conventional independent coolers and filters, the structure is more compact, occupies less space, and can reduce costs.

[0031] 2. An overflow pipe is installed in the heat exchange chamber to ensure that the liquid in the heat exchange chamber can always cover the main body of the heat exchange coil during the cooling and filtration process, so as to give full play to the heat exchange effect of the heat exchange coil and achieve a more complete and effective heat exchange and cooling effect.

[0032] 3. An overflow pipe is installed in the heat exchange chamber. The liquid in the heat exchange chamber can only flow into the cylinder through overflow. Some particulate impurities in the liquid can settle naturally under the action of gravity and be directly left in the heat exchange chamber. This can also reduce the particulate impurities flowing into the cavity, thereby reducing the dirt adhering to the surface of the filter element and thus improving the service life of the filter element.

[0033] 4. The top cover and filter element are easy to disassemble and assemble, which is more conducive to overall cleaning and maintenance. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a liquid filter with heat exchange function according to an embodiment of the present invention.

[0035] Figure 2 This is a top view of a liquid filter with heat exchange function according to an embodiment of the present invention.

[0036] Figure 3 This is a schematic diagram of the structure of the cover in an embodiment of the present utility model. Detailed Implementation

[0037] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0038] As shown in the figure, a liquid filter with heat exchange function includes a cylinder 1, a filter element positioning assembly, a filter element 3, a top cover 4, an overflow pipe 5, and a heat exchange coil 6.

[0039] The cylinder 1 has a cavity 11 with an opening at the upper end, and an outlet channel 12 connected to the cavity 11 is provided at the lower part of the cylinder 1.

[0040] The filter element 3 is used for liquid filtration. It can be directly selected from existing conventional microporous membrane pleated filter elements or spiral-wound filter elements. The structure of the filter element 3 usually includes an inner skeleton, a filter membrane covering the outside of the inner skeleton, and end caps sealed at the upper and lower ends. The upper end cap is closed, and the lower end cap has an opening in the center to form an interface structure.

[0041] The filter element positioning assembly is used for positioning and installing the filter element. It includes a flower plate 21, which is located in the cavity 11 near the bottom and divides the cavity 11 of the cylinder 1 into an inlet cavity and an outlet cavity. The outlet channel 12 is connected to the outlet cavity.

[0042] The flower plate 21 has a plurality of evenly arranged slots, which are vertically connected. The number of filter elements 3 is the same as the number of slots on the flower plate. The filter elements 3 are disposed in the liquid inlet chamber and are inserted into each slot through the interface of the lower end cap, maintaining a seal with the slots. Liquid in the liquid inlet chamber can only flow into the liquid outlet chamber after being filtered by the filter elements. The number of slots on the flower plate and the number of filter elements can be 7, 5, or 3, depending on the specific requirements.

[0043] The filter element positioning assembly also includes a fastening rod 22, a pressure plate 23, and a locking nut 24. The lower end of the fastening rod 22 is fixedly connected to the perforated disc 21, and the upper end has an external thread. The pressure plate 23 has a positioning hole corresponding to the fastening rod 22. The pressure plate 23 can be sleeved on the fastening rod 22 through the positioning hole and positioned above the filter element 3. The locking nut 24 forms a threaded engagement with the external thread at the upper end of the fastening rod 22. After the locking nut 24 is tightened, it forces the pressure plate 23 to press down on the filter element 3. Through the fastening rod 22, pressure plate 23, and locking nut 24, it can be ensured that the filter element can be stably and reliably installed on the perforated disc. Of course, the filter element and the perforated disc can also be connected by threads, which is convenient for connection and ensures a stable and reliable installation seal.

[0044] The upper cover 4 is located at the upper end of the cylinder 1. The upper cover 4 and the cylinder 1 are fixedly connected by several circumferentially distributed bolt locking assemblies 7, and a sealing gasket is provided between the upper cover 4 and the cylinder 1. The bolt locking assembly 7 is a conventional technology, including two relatively movable locking blocks, bolts, and nuts. The locking blocks can clamp the upper cover and the cylinder, and are fixed and locked by the bolts and nuts. The bolt locking assembly 7 is not only convenient to disassemble and assemble, but also secure and reliable, ensuring that the upper cover 4 and the cylinder 1 can clamp the sealing gasket to ensure a reliable sealing connection between the upper cover 4 and the cylinder 1. Of course, other connecting devices such as clamps can also be used to achieve a detachable connection between the upper cover 4 and the cylinder 1.

[0045] In addition, two handles 45 are symmetrically arranged on the outer side of the upper cover 4, which make it easier to move the upper cover and facilitate the disassembly and assembly of the upper cover.

[0046] The upper cover 4 forms a heat exchange cavity 41. The upper cover 4 is also provided with an inlet channel 42 that communicates with the heat exchange cavity 41. The overflow pipe 5 is longitudinally arranged in the middle of the heat exchange cavity 41. The lower end of the overflow pipe is connected to the cavity 11 of the cylinder 1, and the upper end is close to the top of the heat exchange cavity. The heat exchange coil 6 is arranged inside the heat exchange cavity 41 and sleeved on the outside of the overflow pipe 5. The main body of the heat exchange coil 6 is slightly lower than the upper end of the overflow pipe 5. The inlet end and outlet end of the heat exchange coil 6 extend out of the top of the heat exchange cavity 41 and out of the heat exchange cavity 41.

[0047] The upper cover 4 specifically includes a cover body 43 and a base plate 44. The heat exchange chamber 41 is formed on the cover body 43 and has an opening at its lower end. The base plate 44 is fixedly connected to the bottom of the cover body 43 by several circumferentially distributed screws. A central hole with vertical conduction is formed at the center of the base plate 44. The overflow pipe 5 is fixedly connected to the central hole of the base plate 44 and communicates with the central hole. By setting the upper cover 4 into a structure of a cover body and a base plate, it is not only convenient to disassemble and assemble the overflow pipe 5 and the heat exchange coil 6, but also more convenient to clean and maintain the heat exchange chamber 41.

[0048] Furthermore, the overflow pipe 5 and the base plate 43 are integrated into one structure.

[0049] In addition, a positioning groove is formed at the bottom of the cover 42, and the base plate 43 can be embedded in the positioning groove 421, making it easier to position and install.

[0050] The working process of the liquid filter with heat exchange function described above is as follows:

[0051] During filtration and cooling, high-temperature wastewater flows into the heat exchange chamber 41 through the inlet channel 42. At the same time, the heat exchange coil 6 can be connected to the circulating coolant to quickly cool down the high-temperature wastewater in the heat exchange chamber 41. As the high-temperature wastewater continues to flow in, the liquid level in the heat exchange chamber 41 will continue to rise. The wastewater in the heat exchange chamber 41 will basically cover the main body of the heat exchange coil 6. When the liquid level in the heat exchange chamber is higher than the upper end of the overflow pipe 5, the wastewater can flow into the liquid inlet chamber of the cylinder 1 through the overflow pipe 5. The wastewater entering the liquid inlet chamber is filtered by the filter element 3 and then flows into the liquid outlet chamber, and finally discharged through the outlet channel 12.

[0052] In the above filtration process, the wastewater can first exchange heat with the heat exchange coil in the heat exchange chamber 41 of the upper cover 4, and then enter the cavity 11 of the cylinder 1 and be filtered through the filter element 3. Thus, the purpose of heat exchange and filtration can be achieved simultaneously in one filter. Compared with the existing technology that sets two conventional independent coolers and filters, the structure of this embodiment is more compact, occupies less space, and can reduce costs.

[0053] Since the heat exchange chamber 41 is connected to the cavity 11 of the cylinder 1 via the overflow pipe 5, when wastewater flows into the heat exchange chamber 41 through the inlet channel 42, the wastewater in the heat exchange chamber 41 will only flow into the cavity 11 of the cylinder 1 through the overflow pipe 5 when the liquid level in the heat exchange chamber 41 is higher than the upper end of the overflow pipe 5. This ensures that the liquid in the heat exchange chamber 41 always covers the main body of the heat exchange coil 6, thereby ensuring sufficient heat exchange between the heat exchange coil 6 and the wastewater. At the same time, the spiral structure of the heat exchange coil 6 itself can also fill the heat exchange chamber 41 to the maximum extent to ensure a sufficient heat exchange contact area, thereby achieving an effective heat exchange and cooling effect.

[0054] In addition, some particulate impurities in the wastewater can settle naturally under the action of gravity. Therefore, when the overflow flow method is adopted, the settled particulate impurities will be directly left in the heat exchange chamber 41, thereby achieving the effect of preliminary filtration. This reduces the particulate impurities flowing into the chamber 11 with the wastewater, thereby reducing the pollutants attached to the surface of the filter element and thus improving the service life of the filter element.

[0055] Of course, in some special cases, the heat exchange coil can also be connected to a high-temperature liquid or gas to heat the liquid.

[0056] After a period of filtration, the filter surfaces of each filter element 3 will inevitably accumulate contaminants to varying degrees. Excessive contaminants can easily cause blockages, and once a blockage occurs, the blocked filter element 3 needs to be cleaned or replaced.

[0057] When cleaning and maintenance are required, first loosen the bolt locking assembly 7, and then the top cover 4 can be easily removed from the cylinder 1 using the two handles 44.

[0058] After removing the top cover 4, loosen the locking nut and remove the pressure plate to directly pull the filter element out of the cylinder, facilitating cleaning or replacement. Simultaneously, the screws between the top cover 4 and the base plate can be loosened to remove the base plate, allowing easy cleaning of any deposits accumulated in the heat exchange chamber 41, thus facilitating cleaning and maintenance of the heat exchange chamber.

[0059] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0061] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this patent right.

Claims

1. A liquid filter with heat exchange function, comprising: The cylindrical body (1) has a cavity (11) with an opening at the upper end, and an outlet channel (12) connected to the cavity (11) is provided at the lower part of the cylindrical body (1). A filter element positioning assembly is disposed in the cavity (11) of the cylinder (1) for positioning and installing the filter element; The filter element (3) is set in the cavity (11) of the cylinder (1) and is positioned and cooperated with the filter element positioning assembly for liquid filtration; Its characteristic is that it further includes: The upper cover (4) is provided at the upper end of the cylinder (1). The upper cover (4) forms a heat exchange cavity (41). The upper cover (4) is also provided with an inlet channel (42) that communicates with the heat exchange cavity (41). An overflow pipe (5) is longitudinally arranged in the middle of the heat exchange chamber (41), and the lower end of the overflow pipe (5) is connected to the cavity (11) of the cylinder (1); The heat exchange coil (6) is installed inside the heat exchange cavity (41) and sleeved on the outside of the overflow pipe (5). The inlet and outlet ends of the heat exchange coil (6) extend out of the top of the heat exchange cavity (41) and out of the heat exchange cavity (41).

2. The liquid filter with heat exchange function according to claim 1, characterized in that: The upper cover (4) includes: Cover (43), which has a heat exchange cavity (41) with an opening at the lower end. A base plate (44) is provided at the lower end of the cover (43), and a central hole is formed in the center of the base plate (44); The overflow pipe (5) is fixedly connected to the center hole of the base plate (44) and communicates with the center hole.

3. The liquid filter with heat exchange function according to claim 2, characterized in that: The overflow pipe (5) and the base plate (44) are integrated into one structure.

4. The liquid filter with heat exchange function according to claim 2, characterized in that: The bottom of the cover (43) has a positioning groove, the base plate (44) is embedded in the positioning groove, and is fixedly connected to the cover (43) by a number of circumferentially distributed screws.

5. The liquid filter with heat exchange function according to claim 1, characterized in that: The upper end of the overflow pipe (5) is higher than the main body of the heat exchange coil (6).

6. The liquid filter with heat exchange function according to claim 1, characterized in that: The upper cover (4) and the cylinder (1) are fixedly connected by a number of circumferentially distributed bolt locking components (7).

7. The liquid filter with heat exchange function according to claim 1, characterized in that: The top cover (4) has two handles (45) symmetrically arranged on the outer side.

8. The liquid filter with heat exchange function according to claim 1, characterized in that: The filter element positioning assembly includes a flower plate (21), which is located in the cavity (11) near the bottom. The flower plate (21) divides the cavity (11) into an inlet cavity and an outlet cavity. The flower plate (21) is also provided with several slots, which are connected vertically. The filter element (3) is set in the liquid inlet chamber, and several filter elements (3) are respectively inserted into each of the insertion ports of the flower plate (21) and kept sealed with the insertion ports; the outlet channel (12) is connected to the liquid outlet chamber.

9. The liquid filter with heat exchange function according to claim 8, characterized in that: The filter element positioning assembly also includes The fastening rod (22) is fixedly connected to the flower plate (21) at its lower end and has an external thread at its upper end; The pressure plate (23) has a positioning hole corresponding to the fastening rod (22), the pressure plate (23) is sleeved on the fastening rod (22) through the positioning hole and is located above the filter element (3); The locking nut (24) is threadedly engaged with the external thread at the upper end of the fastening rod (22). After the locking nut (24) is locked, it can force the pressure plate (23) to press down on the filter element (3).

10. The liquid filter with heat exchange function according to claim 8, characterized in that: The flower plate (21) has 7 slots, and the filter element (3) is provided with 7 slots respectively and is inserted into the 7 slots.

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