Filtering device for plate heat exchanger

Abstract

The utility model provides a filtering device for a plate heat exchanger, which comprises two impurity filters and a water inlet pipe group, and the two impurity filters are arranged in parallel in the horizontal direction; the impurity filter comprises a cylinder body, a filter screen and a cylinder cover; the barrel is vertically arranged, the top end of the barrel is provided with an opening, the bottom end of the barrel is provided with a water inlet connector, the side wall of the barrel is provided with a water outlet connector, and the water outlet connector is located above the water inlet connector; the filter screen is arranged in the cylinder body and is positioned between the water inlet connector and the water outlet connector; the barrel cover is arranged at an opening in the top end of the barrel; the water inlet pipe group comprises a water inlet main pipe and two water inlet branch pipes, one ends of the two water inlet branch pipes are communicated with the water inlet main pipe, the other ends of the two water inlet branch pipes are respectively communicated with the water inlet interfaces on the two impurity filters, and water inlet valves are arranged on the water inlet branch pipes. The impurities can be prevented from entering the plate filter, the filtering efficiency is continuously guaranteed, and the plate heat exchanger is guaranteed to continue to operate normally.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a filtering device for a plate heat exchanger. Background Art

[0002] Plate heat exchanger is a high-efficiency heat exchanger, which is mainly composed of a series of metal sheets with a certain corrugated shape. Plate heat exchangers are widely used in the fields of chemical industry, HVAC, air conditioning, heat recovery system, heating, petroleum industry, food industry, oil industry, pressure blocker of high-rise buildings, wastewater recovery and ice storage system. The hot and cold media are heat exchanged through the corrugated channels on the plates. Thin rectangular fluid channels will be formed between each heat exchange plate, and the hot and cold heat exchange media will enter these narrow and tortuous flow channels through the holes on the four corners of the plate. The corrugations on the plate will increase the rigidity of the plate and the turbulence of the fluid. The two media form a parallel flow or countercurrent between the plate barriers and exchange heat through the intermediate interlayer plate to achieve the purpose of use.

[0003] Since the flow channel between the plates is long and narrow and the plates are very thin, the fluid used for heat exchange will inevitably contain impurities such as rust, sand, and suspended matter. These impurities may enter the flow channel with the fluid and may scrape against the plates, causing plate wear. In addition, these impurities are easily deposited in the flow channel when passing through the long and narrow flow channel, causing the flow channel to be blocked. Utility Model Content

[0004] The embodiment of the present application provides a filtering device for a plate heat exchanger, comprising two impurity filters and a water inlet pipe group, wherein the two impurity filters are arranged in parallel in a horizontal direction;

[0005] The impurity filter comprises a cylinder, a filter screen and a cylinder cover; the cylinder is arranged vertically, the top end of the cylinder has an opening, the bottom end of the cylinder has a water inlet interface, the side wall of the cylinder has a water outlet interface, and the water outlet interface is located above the water inlet interface;

[0006] The filter screen is arranged inside the cylinder body, and the filter screen is located between the water inlet interface and the water outlet interface; the cylinder cover is arranged at the opening at the top end of the cylinder body;

[0007] The water inlet pipe group includes a water inlet main pipe and two water inlet branch pipes, one end of the two water inlet branch pipes is connected to the water inlet main pipe, and the other end of the two water inlet branch pipes are respectively connected to the water inlet interfaces on two impurity filters, and the water inlet branch pipes are installed with water inlet valves.

[0008] In the filtering device for a plate heat exchanger provided in the embodiment of the present application, the fluid enters the impurity filter from the water inlet pipe group, and then filters the impurities such as rust, silt, and suspended matter through the filter screen, and then flows into the plate filter from the water outlet interface, so that these impurities can be prevented from entering the plate filter, and the plate wear and flow channel blockage of the plate filter can be prevented. In addition, it is also possible to switch between the two impurity filters, and the two impurity filters perform the filtering work alternately, which can continuously ensure the filtering efficiency and ensure that the plate heat exchanger continues to operate normally.

[0009] In one possible implementation manner, in the filtering device for a plate heat exchanger provided in the embodiment of the present application, an ultrasonic cleaning device is installed on the cylinder cover, and the ultrasonic cleaning device includes an ultrasonic generator, a vibration head and a connecting pipe;

[0010] The vibration head is located inside the cylinder body, and is connected to the bottom end of the cylinder cover through the connecting tube. The ultrasonic generator is arranged at the top end of the cylinder cover, and is connected to the vibration head through a wire arranged in the connecting tube.

[0011] In one possible implementation manner, in the filtering device for a plate heat exchanger provided in an embodiment of the present application, a sewage outlet is provided at the bottom end of the cylinder, and a sewage valve is provided on the sewage outlet.

[0012] In one possible implementation manner, the filtering device for a plate heat exchanger provided in an embodiment of the present application further includes a water outlet pipe group, wherein the water outlet pipe group includes a water outlet main pipe and two water outlet branch pipes, one end of the two water outlet branch pipes is connected to the water outlet pipe, and the other ends of the two water outlet branch pipes are respectively connected to the water outlet interfaces on two impurity filters, and a water outlet valve is installed on the water outlet branch pipe.

[0013] In one possible implementation manner, in the filtering device for a plate heat exchanger provided in an embodiment of the present application, the filter screen comprises a vertical screen and a bottom screen, the vertical screen is in a vertical cylindrical shape, and the bottom screen is arranged at the bottom end of the vertical screen;

[0014] An upper ring plate is provided at the top outer edge of the vertical net, and a lower ring plate is provided at the bottom outer edge of the vertical net. The outer wall of the upper ring plate fits with the inner wall of the cylinder, and the outer wall of the lower ring plate fits with the inner wall of the cylinder. The lower ring plate is provided with a plurality of through holes.

[0015] In one possible implementation manner, in the filtering device for a plate heat exchanger provided in an embodiment of the present application, the plurality of through holes on the lower ring plate are evenly distributed along the circumference of the lower ring plate.

[0016] In one possible implementation manner, in the filtering device for a plate heat exchanger provided in an embodiment of the present application, the vibration head of the ultrasonic cleaning device is located in the vertical net.

[0017] In one possible implementation manner, in the filtering device for a plate heat exchanger provided in an embodiment of the present application, a flow monitoring device is provided on the water outlet main pipe.

[0018] In one possible implementation manner, the filtering device for a plate heat exchanger provided in an embodiment of the present application further includes a fixing component, and the two impurity filters are connected through the fixing component.

[0019] In one possible implementation manner, in the filtering device for a plate heat exchanger provided in an embodiment of the present application, the fixing assembly includes a plurality of layer plates, adjacent layer plates are connected by a column, the layer plates have two mounting ports, and the two impurity filters are respectively mounted in the two mounting ports. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 is a schematic structural diagram of a filtering device for a plate heat exchanger provided in an embodiment of the present application;

[0022] Figure 2 is an exploded schematic diagram of an impurity filter in a filtering device for a plate heat exchanger provided in an embodiment of the present application;

[0023] Figure 3 It is a cross-sectional schematic diagram of an impurity filter in a filtering device for a plate heat exchanger provided in an embodiment of the present application.

[0024] Description of Reference Numerals

[0025] 10-impurity filter;

[0026] 11- cylinder;

[0027] 111-water inlet interface;

[0028] 112-water outlet interface;

[0029] 113- sewage outlet;

[0030] 114-drain valve;

[0031] 12-Filter;

[0032] 121-Standing net;

[0033] 122- bottom net;

[0034] 123-upper ring plate;

[0035] 124-lower ring plate;

[0036] 124a - through hole;

[0037] 13-cylinder cover;

[0038] 20-water inlet pipe group;

[0039] 21-water inlet pipe;

[0040] 22-water inlet branch pipe;

[0041] 23-water inlet valve;

[0042] 30-water outlet pipe group;

[0043] 31-water outlet pipe;

[0044] 32-water outlet branch pipe;

[0045] 33-water outlet valve;

[0046] 40-Ultrasonic cleaning device;

[0047] 41-ultrasonic generator;

[0048] 42-shaking head;

[0049] 43-connecting pipe;

[0050] 50-fixed component;

[0051] 51-layer board;

[0052] 52- Column. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0054] Figure 1 is a schematic structural diagram of a filtering device for a plate heat exchanger provided in an embodiment of the present application; Figure 2 is an exploded schematic diagram of an impurity filter in a filtering device for a plate heat exchanger provided in an embodiment of the present application; Figure 3 It is a cross-sectional schematic diagram of an impurity filter in a filtering device for a plate heat exchanger provided in an embodiment of the present application.

[0055] See also Figures 1 to 3 As shown, the embodiment of the present application provides a filtering device for a plate heat exchanger, comprising two impurity filters 10 and a water inlet pipe group 20, wherein:

[0056] The two impurity filters 10 are connected by a fixing assembly 50 and are arranged side by side in the horizontal direction.

[0057] The impurity filter 10 includes a cylinder 11, a filter screen 12 and a cylinder cover 13. The cylinder 11 is arranged vertically, and the top of the cylinder 11 has an opening, which can be used for installing and repairing the filter screen 12. The bottom of the cylinder 11 has a water inlet interface 111, and the side wall of the cylinder 11 has a water outlet interface 112, and the water outlet interface 112 is located above the water inlet interface 111.

[0058] The filter screen 12 is disposed inside the cylinder 11 , and the filter screen 12 is located between the water inlet interface 111 and the water outlet interface 112 . The cylinder cover 13 is disposed at the opening at the top of the cylinder 11 , and is used to close the opening of the cylinder 11 .

[0059] The water inlet pipe assembly 20 includes a water inlet main pipe 21 and two water inlet branch pipes 22. One end of the two water inlet branch pipes 22 is connected to the water inlet main pipe 21, and the water inlet main pipe 21 is connected to a water source. The other ends of the two water inlet branch pipes 22 are respectively connected to the water inlet interfaces 111 on the two impurity filters 10, and a water inlet valve 23 is installed on the water inlet branch pipes 22.

[0060] When in use, the filter device is installed between the water source and the water inlet of the plate filter. The fluid enters the impurity filter 10 through the water inlet pipe assembly 20, and then passes through the filter screen 12 to filter out impurities such as rust, silt, and suspended matter, and then flows into the plate filter through the water outlet interface 112, so that these impurities can be prevented from entering the plate filter, and the plate of the plate filter can be prevented from being worn and the flow channel blocked.

[0061] The two impurity filters 10 can filter the fluid at the same time, or only one of the impurity filters 10 can be used to filter the fluid. Generally speaking, only one of the impurity filters 10 is used, and the other filter is in a standby state, at which time one of the water inlet valves 23 on the two water inlet branches 22 is opened and the other is closed.

[0062] This is because the impurities filtered by the filter 12 will be trapped in the impurity filter 10 and may be attached to the filter 12. When these impurities attached to the filter 12 accumulate to a certain extent, the filter 12 will be blocked, thereby affecting the flow velocity of the fluid and reducing the filtering efficiency. At this time, it is necessary to clean the filter 12 or restore the filtering efficiency of the impurity filter 10 by using a better filter 12.

[0063] Therefore, when the impurities in the impurity filter 10 accumulate to a certain extent and cause the filtration efficiency to decrease, the water inlet valve 23 on the water inlet branch pipe 22 connected to this impurity filter 10 can be closed. At the same time, the water inlet valve 23 on the water inlet branch pipe 22 connected to another impurity filter 10 is opened, and the fluid is filtered by another impurity filter 10. In this way, the filtration efficiency can be continuously guaranteed, and the plate heat exchanger can continue to operate normally without stopping. When another impurity filter 10 is working, the previously used impurity filter 10 can be inspected and repaired, and the filter screen 12 of the impurity filter 10 can be cleaned or replaced. The two impurity filters 10 perform the filtration work alternately. Similarly, when the impurity filter 10 fails and needs to be stopped, another impurity filter 10 can be used to replace it in time.

[0064] Specifically, the fixing assembly 50 includes a plurality of layer plates 51 , and adjacent layer plates 51 are connected by columns 52 . The layer plates 51 are provided with two mounting openings, and the two impurity filters 10 are respectively mounted in the two mounting openings.

[0065] See also Figure 3 As shown, in the embodiment of the present application, the filter screen 12 includes a vertical screen 121 and a bottom screen 122, the vertical screen 121 is in a vertical cylindrical shape, and the bottom screen 122 is arranged at the bottom end of the vertical screen 121. An upper ring plate 123 is arranged at the top outer edge of the vertical screen 121, and a lower ring plate 124 is arranged at the bottom outer edge of the vertical screen 121. The outer wall of the upper ring plate 123 is in contact with the inner wall of the cylinder 11, and the outer wall of the lower ring plate 124 is in contact with the inner wall of the cylinder 11. The lower ring plate 124 is provided with a plurality of through holes 124a, and the plurality of through holes 124a on the lower ring plate 124 are evenly distributed along the circumference of the lower ring plate 124. Designing the filter screen 12 into a three-dimensional shape similar to a cylinder can increase the area of ​​the filtering surface. In the process of fluid flowing from bottom to top, part of the fluid is filtered by the bottom screen 122, and the other part of the fluid flows from the through holes 124a between the vertical screen 121 and the inner wall of the cylinder 11 and is filtered by the vertical screen 121.

[0066] See also Figure 1As shown, specifically, it also includes a water outlet pipe group 30, which includes a water outlet main pipe 31 and two water outlet branch pipes 32. One end of the two water outlet branch pipes 32 is connected to the water outlet pipe, and the other end of the two water outlet branch pipes 32 is respectively connected to the water outlet interface 112 on the two impurity filters 10, and a water outlet valve 33 is installed on the water outlet branch pipe 32. A flow monitoring device (not shown in the drawings) is provided on the water outlet main pipe 31.

[0067] See also Figure 1 and Figure 3 As shown, in the embodiment of the present application, an ultrasonic cleaning device 40 is installed on the cylinder cover 13, and the ultrasonic cleaning device 40 includes an ultrasonic generator 41, a vibration head 42 and a connecting pipe 43. The vibration head 42 is located in the vertical net 121 of the cylinder body 11, and the vibration head 42 is connected to the bottom end of the cylinder cover 13 through the connecting pipe 43. The ultrasonic generator 41 is arranged at the top of the cylinder cover 13, and the ultrasonic generator 41 is connected to the vibration head 42 through a wire arranged in the connecting pipe 43. A sewage outlet 113 is arranged at the bottom end of the cylinder body 11, and a sewage valve 114 is arranged on the sewage outlet 113.

[0068] The flow rate monitoring device provided on the water outlet main pipe 31 can monitor the flow rate of the filtered fluid in real time. When the flow rate drops to a certain level, it can be preliminarily determined that the filter screen 12 of the impurity filter 10 needs to be cleaned or replaced. At this time, the water outlet valve 33 and the water inlet valve 23 on the pipeline connected to the impurity filter 10 are closed, and the ultrasonic cleaning device 40 is started. The vibration head 42 of the ultrasonic cleaning device 40 will continue to vibrate, thereby shaking off the impurities attached to the filter screen 12. After the filter screen 12 is cleaned again, the sewage valve 114 is opened to discharge the impurities along with the fluid from the sewage outlet 113.

[0069] In order to facilitate the above operations, the water inlet valve 23, the water outlet valve 33 and the sewage valve 114 can all use solenoid valves and be connected to the same network with the flow monitor. In this way, automatic switching of the impurity filter 10 and automatic cleaning can be achieved by automatically controlling these solenoid valves located on different pipelines.

[0070] In the description of the embodiments of the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0071] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A filtering device for a plate heat exchanger, characterized in that: It comprises two impurity filters and a water inlet pipe group, wherein the two impurity filters are arranged in parallel in the horizontal direction; The impurity filter comprises a cylinder, a filter screen and a cylinder cover; the cylinder is arranged vertically, the top end of the cylinder has an opening, the bottom end of the cylinder has a water inlet interface, the side wall of the cylinder has a water outlet interface, and the water outlet interface is located above the water inlet interface; The filter screen is arranged inside the cylinder body, and the filter screen is located between the water inlet interface and the water outlet interface; the cylinder cover is arranged at the opening at the top end of the cylinder body; The water inlet pipe group includes a water inlet main pipe and two water inlet branch pipes, one end of the two water inlet branch pipes is connected to the water inlet main pipe, and the other end of the two water inlet branch pipes are respectively connected to the water inlet interfaces on two impurity filters, and the water inlet branch pipes are installed with water inlet valves.

2. The filtering device for a plate heat exchanger according to claim 1, characterized in that: An ultrasonic cleaning device is installed on the cylinder cover, and the ultrasonic cleaning device includes an ultrasonic generator, a vibration head and a connecting pipe; The vibration head is located inside the cylinder body, and is connected to the bottom end of the cylinder cover through the connecting tube. The ultrasonic generator is arranged at the top end of the cylinder cover, and is connected to the vibration head through a wire arranged in the connecting tube.

3. The filtering device for a plate heat exchanger according to claim 2, characterized in that: The bottom end of the cylinder is provided with a sewage outlet, and the sewage outlet is provided with a sewage valve.

4. The filtering device for a plate heat exchanger according to claim 2, characterized in that: It also includes a water outlet pipe group, which includes a water outlet main pipe and two water outlet branches. One end of the two water outlet branches is connected to the water outlet pipe, and the other end of the two water outlet branches is respectively connected to the water outlet interfaces on two impurity filters. A water outlet valve is installed on the water outlet branch pipe.

5. The filtering device for a plate heat exchanger according to claim 4, characterized in that: The filter screen comprises a vertical screen and a bottom screen, the vertical screen is in a vertical cylindrical shape, and the bottom screen is arranged at the bottom end of the vertical screen; An upper ring plate is provided at the top outer edge of the vertical net, and a lower ring plate is provided at the bottom outer edge of the vertical net. The outer wall of the upper ring plate fits with the inner wall of the cylinder, and the outer wall of the lower ring plate fits with the inner wall of the cylinder. The lower ring plate is provided with a plurality of through holes.

6. The filtering device for a plate heat exchanger according to claim 5, characterized in that: The plurality of through holes on the lower ring plate are evenly distributed along the circumference of the lower ring plate.

7. The filtering device for a plate heat exchanger according to claim 5, characterized in that: The vibration head of the ultrasonic cleaning device is located in the vertical net.

8. The filtering device for a plate heat exchanger according to claim 5, characterized in that: The water outlet main pipe is provided with a flow monitoring device.

9. The filtering device for a plate heat exchanger according to any one of claims 1 to 8, characterized in that: It also includes a fixing component, through which the two impurity filters are connected.

10. The filtering device for a plate heat exchanger according to claim 9, characterized in that: The fixing assembly includes a plurality of layer plates, and the adjacent layer plates are connected by a column. The layer plates are provided with two mounting openings, and the two impurity filters are respectively mounted in the two mounting openings.

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