A Y-type filter and water cooler circulating water filtering device

Abstract

The utility model discloses a Y-type filter and a circulating water filter device for a water cooler, which belong to the field of coal chemical industry. The above-mentioned Y-type filter includes a filter screen, a slag storage bag is arranged below the filter screen, a scraper is arranged inside the filter screen, a steel brush is arranged at the edge of the scraper, the steel brush is in contact with the filter screen, and the scraper is fixedly connected with a push-pull rod; a baffle is fixedly arranged on the bottom of the filter screen; through holes are provided on the scraper and the baffle, and a circular covering surface is formed when the scraper and the baffle are of the same height, and the circular covering surface matches the cross-section of the filter screen. The above-mentioned circulating water filter device for a water cooler includes a filter bypass arranged on a circulating water supply pipeline, and the filter bypass includes a Y-type filter. It can solve the technical problems that the existing heat exchanger cleaning process is cumbersome, the filter cleaning process is complicated, and the filter screen cannot be quickly cleaned online while ensuring the normal operation of the system after the filter is blocked.

Description

Technical Field

[0001] The utility model belongs to the field of coal chemical industry and relates to a Y-type filter and a circulating water filtering device for a water cooler. Background Art

[0002] In production and operation, some water coolers in the coal chemical industry are located at the end of the circulating water main of the device, or due to the large amount of debris in the circulating water network, the heat exchanger is frequently blocked during operation, resulting in poor heat exchange effect. In addition, the water cooler is prone to scale formation in the pipeline after long-term operation, which will cause poor heat exchange effect of the heat exchanger, resulting in high shell outlet temperature, increased material loss, and in severe cases, causing indicators to exceed the standard or even causing the device to fail to operate normally. In order to solve the blockage problem, the water cooler heat exchanger adopts a relatively cumbersome backwashing procedure for cleaning. The above cleaning requires the removal of the circulating water head, and the risk of corrosion and perforation of the water cooler tube bundle is high, which restricts the stable and long-term environmental operation of the system.

[0003] Furthermore, in order to alleviate the clogging problem of the water cooler heat exchanger, a Y-type filter is used for filtering. However, the existing Y-type filter requires disassembling the filter cartridge part of the Y-type filter to expose the filter screen, then taking out the filter screen and placing it in a cleaning container, and then using clean water or an appropriate cleaning agent to clean the filter screen to remove debris and dirt thereon. However, the above cleaning process is complicated and after the filter is clogged, the filter screen cannot be quickly cleaned online while ensuring the normal operation of the system. Utility Model Content

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a Y-type filter and a water cooler circulating water filtration device to solve the technical problems that the existing heat exchanger cleaning process is cumbersome, the filter cleaning process is complicated, and the filter cannot be quickly cleaned online while ensuring the normal operation of the system after the filter is blocked.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a Y-type filter, comprising a filter screen, a slag storage bag is arranged below the filter screen, a scraper is arranged inside the filter screen, a steel brush is arranged at the edge of the scraper, the steel brush is in contact with the filter screen, and the scraper is fixedly connected with a push-pull rod; a baffle is fixedly arranged at the bottom of the filter screen; through holes are opened on the scraper and the baffle, and a circular covering surface is formed when the scraper and the baffle are of the same height, and the circular covering surface matches the cross section of the filter screen.

[0007] In one embodiment, the apertures of the through holes formed on the scraper and the baffle are smaller than the apertures of the filter holes on the filter screen.

[0008] In one embodiment, one end of the push-pull rod is fixedly connected to the central portion of the scraper, and the other end of the push-pull rod passes through the bottom of the slag storage bag.

[0009] In one embodiment, a push-pull rod pressure cover is provided at the contact point between the push-pull rod and the outer side of the bottom of the slag storage bag.

[0010] In one embodiment, a slag discharge port is provided on an oblique side of the slag storage bag.

[0011] In one embodiment, a slag discharge valve is provided on the slag discharge port.

[0012] In one embodiment, the scraper and the baffle are semicircular plates with equal areas.

[0013] In one embodiment, the scraper moves up and down and rotates along the inner surface of the filter screen.

[0014] The utility model also provides a circulating water filtering device for a water cooler, comprising a filtering bypass arranged on a circulating water supply pipeline, wherein the filtering bypass comprises a Y-type filter.

[0015] In one embodiment, the filter bypass also includes a filter pipe, a differential pressure gauge and a stop valve; the inlet of the filter pipe is connected to a connecting port of the circulating water supply pipe, and the outlet of the filter pipe is connected to another connecting port of the circulating water supply pipe; the Y-type filter is arranged on the filter pipe; a group of stop valves are respectively arranged upstream and downstream of the Y-type filter; one connecting port of the differential pressure gauge is connected to the inlet of the Y-type filter, and the other connecting port of the differential pressure gauge is connected to the outlet of the Y-type filter.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a Y-type filter, in which the filter screen is used to intercept and remove impurities in the fluid. In order to clean the filter screen to maintain its filtering performance, the scraper and the steel brush on its edge are in contact with the filter screen to effectively remove impurities on the surface of the filter screen. Through the operation of the push-pull rod, the scraper can move along the inner surface of the filter screen to achieve all-round cleaning, ensuring that the filter screen always maintains high-efficiency filtering performance. The baffle is arranged opposite to the scraper to form a complete circular surface to cover the filter screen. The baffle plays a blocking and positioning role when the scraper scrapes off impurities, and can also prevent impurities from re-entering the fluid. The through holes opened on the scraper and the baffle allow the fluid to pass through and further filter the impurities to fall into the slag storage bag below.

[0018] Furthermore, since the aperture of the through holes formed on the scraper and the baffle is smaller than the aperture of the filter holes on the filter screen, larger impurities are prevented from entering the through holes and clogging the scraper and the baffle, further ensuring the smooth operation of the filter.

[0019] Furthermore, the push-pull rod is fixedly connected to the center of the scraper, and the other end passes through the bottom of the slag bag, so that the filter screen can be easily cleaned by operating the push-pull rod. The setting of the push-pull rod gland ensures the sealing between the push-pull rod and the slag bag, and also increases the stability of the operation.

[0020] Furthermore, a slag discharge port is provided at the oblique side of the slag storage bag to facilitate the discharge of the collected impurities. A slag discharge valve provided on the slag discharge port can control the slag discharge process, thereby increasing the convenience and safety of the operation.

[0021] The utility model also provides a water cooler circulating water filtering device, which adds a new Y-type filter and a bypass pipeline to the water cooler circulating water supply pipeline. After the filter is blocked, the filter screen can be quickly cleaned online while ensuring the normal operation of the system. Secondly, when the water cooler is seriously blocked, the debris attached to the circulating water head of the heat exchanger can be flushed out from the filter through the slag storage bag at the bottom of the filter, which significantly improves the heat exchange effect of the heat exchanger and provides convenience for online backwashing. It not only facilitates online cleaning of the filter screen, but also solves the tediousness of traditional heat exchanger cleaning that requires dismantling the head for cleaning, and reduces the risk of corrosion and perforation of the water cooler tube bundle, effectively solving the problem of heat exchanger blockage and ensuring the stable and full-cycle operation of the device.

[0022] Furthermore, by implementing the combination of online cleaning of the filter and backwashing, the debris accumulated at the filter and the circulating water head can be removed in time, which significantly improves the heat exchange effect of the heat exchanger, not only ensuring the smooth flow of the fluid, but also preventing waste of materials due to high temperature, or even causing adverse effects such as parking due to excessive indicators. The filter provided by the utility model has a simple structure, is easy to make, is easy to observe the degree of blockage, has low equipment cost, avoids the tediousness of cleaning the filter and removing the head, and stops the heat exchanger for backwashing, and is conducive to large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a Y-type filter of the utility model;

[0024] Figure 2 It is a schematic diagram of the circulating water filter device of the water cooler of the utility model;

[0025] Among them: 1-heat exchanger; 2-circulating water supply pipeline; 3-circulating return water pipeline; 4-Y-type filter; 5-stop valve; 6-shell side medium inlet; 7-shell side medium outlet; 8-differential pressure gauge; 9-push-pull rod; 10-slag storage bag; 11-scraper; 12-baffle; 13-slag discharge valve; 14-filter; 15-push-pull rod pressure cover. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model 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 interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. 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 that includes 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.

[0028] The utility model is further described in detail below with reference to the accompanying drawings:

[0029] See also Figure 1 On the one hand, the utility model provides a Y-type filter, which mainly includes a push-pull rod 9, a slag bag 10, a scraper 11, a baffle 12 and a filter 14; the filter 14 is arranged inside the branch pipe of the Y-type filter 4, close to the inner wall and cylindrical, and the filter 14 is used to intercept impurities and particles in the fluid. The filter 14 is usually made of corrosion-resistant materials and has an appropriate aperture to allow the fluid to pass through and intercept impurities. The slag bag 10 is located below the filter 14, and is used to collect impurities and particles intercepted by the filter and impurities scraped by the scraper 11 and attached to the filter 14. The scraper 11 is arranged inside the filter 14, and a steel brush is arranged at the edge of the scraper 11, which is in close contact with the filter. The scraper 11 removes stubborn impurities attached to the filter 14 through the steel brush on its edge, so as to keep the filter clean and filter efficient. The push-pull rod 9 is fixedly connected to the scraper 11, and the scraper 11 is connected to the external operating mechanism through the push-pull rod 9, allowing the user to control the movement of the scraper by push-pull operation. The scraper 11 and the baffle 12 are provided with through holes, allowing a small amount of water to flow through, which can not only wash away the debris in the slag bag 10, but also will not affect the operation of the system. The baffle 12 is arranged at the bottom of the filter screen 14, and the baffle 12 is fixedly connected to the filter screen 14 to form a semi-closed bottom structure. When the scraper 11 and the baffle 12 are at the same height, a circular covering surface is formed, and this circular covering surface matches the cross section of the filter screen 14.

[0030] The Y-type filter 4 is used to filter mechanical impurities in the medium, such as rust and sand in sewage, a small amount of solid particles in the liquid, etc. The main part of the Y-type filter 4 is in the shape of a "Y", which helps to effectively divert and filter the fluid in the filter. The fluid enters from the inlet of the main pipe, is filtered by the filter screen 14, and flows out from the outlet of the main pipe. When the fluid enters the Y-type filter 4, it will first pass through the filter screen 14. The solid particles and impurities in the fluid will be blocked on the filter screen 14, and the clean fluid will continue to flow through the filter screen 14. Due to the "Y"-shaped pipeline design, the fluid will be divided into two streams: one part continues to flow downward, and the other part tilts to both sides. The tilted fluid will flow through the branch pipe of the Y-type filter 4, and the impurities therein will settle at the bottom of the branch pipe due to gravity. The fluid flowing below will pass through the filter screen 14 to remove the solid particles, impurities, etc.

[0031] Furthermore, the baffle 12 is fixedly connected to the filter screen 14 and is located at the bottom of the filter screen 14 to form a semi-closed state. The sum of the areas of the scraper 11 and the baffle 12 is equal to the cross-section of the cylindrical filter screen 14 .

[0032] In the specific implementation process, the aperture of the through hole opened on the scraper 11 and the baffle 12 is smaller than the aperture of the filter hole on the filter screen 14. Preferably, the aperture of the filter screen 14 is 4 mm, the aperture of the through hole opened on the scraper 11 and the baffle 12 is 1 mm, and the scraper 11 and the baffle 12 are preferably made of stainless steel.

[0033] In the specific implementation process, one end of the push-pull rod 9 is fixedly connected to the center of the scraper 11, and the other end of the push-pull rod 9 passes through the bottom of the slag storage bag 10. A push-pull rod gland 15 is provided at the outer contact point between the push-pull rod 9 and the bottom of the slag storage bag 10. Preferably, the handle of the push-pull rod 9 is T-shaped.

[0034] Furthermore, the push-pull rod 9 can be extended to 1 / 3 to 1 / 2 of the filter screen 14. In the operating state, the scraper 11 is at 1 / 3 of the filter screen 14. The push-pull rod 9 and the scraper 11 are welded in the center and are made of stainless steel, which has strong corrosion resistance and a large flow area.

[0035] In the specific implementation process, a slag discharge port is provided at the oblique side of the slag storage bag 10. Furthermore, a slag discharge valve 13 is provided on the slag discharge port.

[0036] In the specific implementation process, the scraper 11 and the baffle 12 are semicircular plates with equal areas. The size of the scraper 11 is 1 / 2 of the semi-arc size of the filter screen.

[0037] In a specific implementation process, the scraper 11 moves up and down and rotates along the inner surface of the filter screen 14 .

[0038] Since the traditional circulating water pipeline directly leads to the heat exchanger 1, it is impossible to intercept solid particles, sand and gravel and other debris in the circulating water, and the debris can easily block the heat exchanger tubes. Large debris can directly block the tubes, and the heat exchanger 1 loses the heat exchange effect. The original heat exchanger 1 is provided with a shell side medium inlet 6 and a shell side medium outlet 7. The heat exchanger 1 is connected with a circulating water supply pipe 2 and a circulating water return pipe 3. The utility model adds a Y-type filter 4 to the circulating water supply pipe 2 and adds a filter bypass.

[0039] See also Figure 2 On the other hand, the utility model provides a water cooler circulating water filtering device, including a filtering bypass arranged on the circulating water supply pipe 2, and the filtering bypass includes the above-mentioned Y-type filter 4.

[0040] More specifically, the filter bypass includes a Y-type filter 4, a filter pipe, a differential pressure gauge 8 and a stop valve 5; the inlet and outlet of the filter pipe are respectively connected to the two connecting ports of the circulating water supply pipe 2; the Y-type filter 4 is arranged on the filter pipe; a group of stop valves 5 are respectively arranged upstream and downstream of the Y-type filter 4; the two connecting ports of the differential pressure gauge 8 are respectively connected to the inlet and outlet of the Y-type filter 4 to monitor the pressure difference changes on both sides of the Y-type filter 4 and determine whether the filter 14 needs to be cleaned.

[0041] The pipe and the slag bag 10 are connected by bolts, which can provide convenience for the online backwashing of the heat exchanger 1. The original backwashing technology requires the removal of the heat exchanger head after stopping. Since the expansion coefficients of the water cooler tube and the scale are different, the cleaning purpose is achieved by changing the flow direction of water in the heat exchanger 1, that is, by reverse flushing turbulence on the sediment directional surface, the original scale can often gradually crack. By opening the slag discharge valve 13 of the slag bag 10 at the bottom of the Y-type filter 4, the debris attached to the water head of the heat exchanger 1 circulation can also be flushed out from the Y-type filter 4, which significantly improves the heat exchange effect of the heat exchanger 1. The traditional online backwashing requires the removal of the heat exchanger 1 head. The newly added new filter solves the tediousness of the traditional backwashing of the heat exchanger 1, which requires the removal of the head for cleaning, and reduces the risk of corrosion and perforation of the water cooler tube bundle, effectively solving the blockage problem of the heat exchanger 1 and ensuring the stable operation of the device.

[0042] The use process of the above water cooler circulating water filter device is as follows:

[0043] In case of blockage in the heat exchanger 1, the water flow direction in the heat exchanger 1 is changed from the usual cooling water flow direction to the reverse flushing flow direction. After the water flow direction is changed, the impact force of the water flow will act on the sediment and scale, forming a reverse flushing turbulence, which can effectively cause the original scale to gradually crack or even peel off. During the reverse flushing process, the peeled scale and sediment will be brought into the Y-type filter 4 by the water flow. The water flows through the Y-type filter 4, and the filter screen 14 in the Y-type filter 4 intercepts solid particles, sand and other impurities in the water. As time goes by, impurities gradually accumulate on the filter screen 14, causing the pressure difference on both sides of the Y-type filter 4 to increase. When the pressure difference reaches the preset cleaning threshold (such as the pressure difference increases to a certain value), the filter screen 14 needs to be cleaned without stopping or removing any parts of the Y-type filter 4. By operating the scraper 11 to push and pull back and forth inside the Y-type filter 4 2-3 times, the scraper 11 will filter the filter 1 4 is pushed into the slag bag 10. In addition, the Y-shaped pipe is inclined, and the solid particles and sand in the fluid are usually precipitated in the slag bag 10 under the action of gravity. When the scraper 11 and the baffle 12 are at the same height (flush), the slag discharge valve 13 of the slag bag 10 can be opened to discharge the collected debris. Since the scraper 11 and the baffle 12 are provided with through holes, a small amount of water is allowed to flow through to flush the debris in the slag bag 10. Not only can the debris in the slag bag 10 be flushed, but the operation of the system will not be affected.

[0044] By combining online cleaning of the filter and backwashing, the debris accumulated at the filter 14 and the circulating water head can be removed in time, which significantly improves the heat exchange effect of the heat exchanger 1, not only ensuring the smooth flow of the fluid, but also preventing waste of materials due to high temperature, or even causing adverse effects such as parking due to excessive indicators. The Y-type filter 4 has a simple structure, is easy to make, is easy to observe the degree of blockage, has low equipment cost, avoids the tediousness of cleaning the filter 14 and removing the head, and stops the heat exchanger 1 for backwashing, and is conducive to large-scale promotion and use.

[0045] Example

[0046] The present embodiment provides a Y-type filter, wherein the Y-type filter 4 comprises a filter screen 14 with a pore size of 4 mm, and a slag bag 10 is provided below the filter screen 14 for collecting debris. A semicircular scraper 11 is provided inside the filter screen 14, and a 1 mm steel brush is provided on the edge of the scraper 11 to ensure close contact with the filter screen 14 for effective cleaning. The scraper 11 is operated by a push-pull rod 9, which is designed with a T-shaped handle for easy operation and can be extended to a position of 1 / 3 to 1 / 2 of the filter screen 14. At the bottom of the filter screen 14, a semicircular stainless steel baffle 12 with a pore size of 1 mm is fixed, and through holes are provided on the scraper 11 and the baffle 12, and the baffle 12 and the scraper 11 together form a circular covering surface that matches the cross-section of the filter screen 14. A slag discharge port is provided on the oblique side of the slag storage bag 10, and a slag discharge valve 13 is provided on the slag discharge port.

[0047] The present embodiment provides a water cooler circulating water filtering device, which effectively intercepts solid particles and sand and gravel in the circulating water by adding a new Y-type filter 4 and a filter bypass to the circulating water supply pipe 2, thereby preventing them from clogging the heat exchanger tubes and ensuring the heat exchange effect.

[0048] Specifically, the filter bypass includes a Y-type filter 4, a filter pipeline, a differential pressure gauge 8 and a stop valve 5;

[0049] The inlet of the filter pipe is connected to a connection port of the circulating water supply pipe 2, and the outlet of the filter pipe is connected to another connection port of the circulating water supply pipe 2; the Y-type filter 4 is arranged on the filter pipe; a group of stop valves 5 are respectively arranged upstream and downstream of the Y-type filter 4; one connection port of the differential pressure gauge 8 is connected to the inlet of the Y-type filter 4, and the other connection port of the differential pressure gauge 8 is connected to the outlet of the Y-type filter 4.

[0050] The Y-type filter 4 has a filter screen 14 with a 4mm pore size and a stainless steel closed structure, i.e., a baffle 12, with a 1mm pore size. It is matched with a scraper 11 with a 1mm steel brush, and is operated by a T-shaped push-pull rod 9 to realize online cleaning of the filter screen 14 without stopping or disassembling parts. A pressure differential gauge 8 is set before and after the Y-type filter 4 to facilitate monitoring of blockage. During cleaning, it is only necessary to push and pull the scraper 11 several times to collect the debris into the slag bag 10, which will naturally settle by gravity, and the 1mm pore size of the scraper 11 and the baffle 12 can be used to flush the slag bag 10 to avoid affecting the operation of the system. This design not only simplifies the backwashing process and reduces the risk of corrosion and perforation of the water cooler tube bundle, but also significantly improves the heat exchange effect of the heat exchanger 1, ensures the stable operation of the device, and has the advantages of simple structure, convenient manufacture, and low cost, and is suitable for large-scale promotion and use.

[0051] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A Y-type filter, characterized in that: The invention comprises a filter screen (14), a slag storage bag (10) is arranged below the filter screen (14), a scraper (11) is arranged inside the filter screen (14), a steel brush is arranged at the edge of the scraper (11), the steel brush is in contact with the filter screen (14), and the scraper (11) is fixedly connected to a push-pull rod (9); a baffle (12) is fixedly arranged at the bottom of the filter screen (14); through holes are provided on the scraper (11) and the baffle (12), and when the scraper (11) and the baffle (12) are of the same height, a circular covering surface is formed, and the circular covering surface matches the cross section of the filter screen (14).

2. The Y-type filter according to claim 1, characterized in that: The apertures of the through holes formed on the scraper (11) and the baffle (12) are smaller than the apertures of the filter holes on the filter screen (14).

3. The Y-type filter according to claim 1, characterized in that: One end of the push-pull rod (9) is fixedly connected to the central part of the scraper (11), and the other end of the push-pull rod (9) passes through the bottom of the slag storage bag (10).

4. The Y-type filter according to claim 1, characterized in that: A push-pull rod pressure cover (15) is provided at the outer contact point between the push-pull rod (9) and the bottom of the slag storage bag (10).

5. The Y-type filter according to claim 1, characterized in that: A slag discharge port is provided on the oblique side of the slag storage bag (10).

6. The Y-type filter according to claim 5, characterized in that: The slag discharge port is provided with a slag discharge valve (13).

7. The Y-type filter according to claim 1, characterized in that: The scraper (11) and the baffle (12) are semicircular plates with equal areas.

8. The Y-type filter according to claim 1, characterized in that: The scraper (11) moves up and down and rotates along the inner surface of the filter screen (14).

9. A water cooler circulating water filter device, characterized in that: It comprises a filter bypass arranged on a circulating water supply pipe (2), wherein the filter bypass comprises a Y-type filter (4) as claimed in any one of claims 1 to 8.

10. The circulating water filter device for a water cooler according to claim 9, characterized in that: The filter bypass also includes a filter pipeline, a differential pressure gauge (8) and a stop valve (5); The inlet of the filter pipe is connected to a connection port of the circulating water supply pipe (2), and the outlet of the filter pipe is connected to another connection port of the circulating water supply pipe (2); the Y-type filter (4) is arranged on the filter pipe; A set of stop valves (5) are respectively arranged upstream and downstream of the Y-type filter (4); one connection port of the differential pressure gauge (8) is connected to the inlet of the Y-type filter (4), and the other connection port of the differential pressure gauge (8) is connected to the outlet of the Y-type filter (4).

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