Filter for circulating water pipeline of spray tower

Abstract

The utility model relates to the technical field of spray towers, in particular to a filter for a circulating water pipeline of a spray tower, which comprises the spray tower, and a filter, a vertical centrifugal water pump and a plurality of valves which are connected in series through a water inlet pipe, the filter comprises a shell and a blow-off pipe connected with the bottom of the shell, and a cover plate is arranged at the top of the shell. According to the filter for the circulating water pipeline of the spray tower, an air compressor utilizes compressed air to enable the flat nozzle to form powerful air flow, the air flow is fan-shaped, an included angle is formed between the air flow and the filter element, certain cutting and blowing force is formed, sticky materials attached to the wall of the filter element can be stripped and removed, and the removed scraps are discharged through the bottom blow-off pipe; after compressed air purging is completed, water flow is backwashed through the water guide pipe, a small amount of residual chippings can be further flushed out, online automatic operation can be achieved, the system does not need to be shut down, and operation of the waste gas treatment system is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of spray towers, in particular to a filter for a circulating water pipeline of a spray tower. Background Art

[0002] The spray tower is one of the essential process units commonly used for waste gas purification in environmental protection. Its principle is to use the waste gas and circulating spray water to contact each other in the tower through countercurrent flow to achieve waste gas adsorption and purification. The most troubling thing for people in long-term use is the blockage of the spiral nozzle in the tower. When the nozzle is blocked, the water outlet of the nozzle cannot form a good water curtain to effectively cover the countercurrent of the waste gas, and the absorption and purification effect of particulate matter and volatile organic compounds in the waste gas becomes worse. In severe cases, it is blocked and no water is sprayed, causing people to have to stop the equipment for maintenance. The main reason is that the circulating water filtration effect is poor or there is no filter.

[0003] At present, the Y-shaped pipe filter is commonly used in the circulating water pipe of the spray tower. This filter has several major disadvantages:

[0004] 1. The filter area is small, and the ratio of the filter area to the pipe cross-sectional area is ≤3 (a larger ratio can improve the pipe's anti-clogging ability). When a small amount of debris in the water blocks the filter, the conduction capacity will be significantly reduced, causing the spray pressure to drop and the exhaust gas treatment effect to deteriorate;

[0005] 2. The inner core of the Y pipe filter is used for water inlet (inside the cylindrical filter and outside), which is difficult to clean after being clogged with debris;

[0006] 3. Disassembly is too troublesome, time-consuming and labor-intensive.

[0007] In addition, there are also filters with backwashing. This type of filter uses water to reverse the filter element for a short period of time (the opposite of normal operation). The original intention is to make the water flow backward through the filter so that the clogging can be removed by backwashing. However, in long-term operation, it was found that this method cannot achieve the effect of cleaning the filter. Because various tiny particles in the sprayed circulating water are deposited and attached to the filter with viscous characteristics, they are attached to the filter wall in the direction of the water inlet surface and block the filter holes. The impact force of the backwash is against the water inlet surface, which does not work on the viscous attachments on the filter wall. It only has some small force on the filter element holes, which is not enough to overcome the adhesion of the viscous material hanging on the mesh wall. Moreover, the backwashing of water without clustering water flow cannot produce a large pressure and flow rate, and cannot form a strong impact force, so the filter blockage removal effect is not ideal. Utility Model Content

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a filter for a circulating water pipeline of a spray tower, comprising a spray tower and a filter, a vertical centrifugal water pump and a plurality of valves connected in series through a water inlet pipe, a pressure gauge being installed on the side of the water inlet pipe close to the vertical centrifugal water pump, the filter comprising an outer shell and a sewage pipe connected to the bottom of the outer shell, a cover plate being provided on the top of the outer shell, a protruding end being formed at the bottom of the cover plate, a filter element being clamped on the outer side of the protruding end, a ring plate being clamped on the bottom of the filter element, the bottom of the ring plate being connected to the water outlet end of the outer shell, and a plurality of nozzles being installed in an inclined state on the top of the cover plate.

[0009] Furthermore, the ring plate is in a boss shape, and a sealing strip is embedded and installed on the minimum diameter of the ring plate and the cover plate and on the bottom of the cover plate.

[0010] Furthermore, a plurality of bases are installed on the top of the cover plate, the nozzle is installed on the bottom of the base, a quick-connect pipe connected to an external air compressor is installed on the top of the base, and the nozzle has a flat mouth.

[0011] Furthermore, a side block and a connecting rod mechanism are fixed on one side of the shell, one end of the connecting rod mechanism is clamped with the side block, and the top of the cover plate is rotatably connected to a screw handwheel, the outer side of the screw handwheel is threadedly connected to a nut, and the nut is embedded in the interior of the cross bar of the connecting rod mechanism.

[0012] Furthermore, a water guide pipe is installed on the outer side of the water inlet pipe near the water outlet end of the shell.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The filter of the circulating water pipeline of the spray tower uses compressed air through an air compressor to form a strong airflow through a flat nozzle. The airflow is fan-shaped and has an angle with the filter element, forming a certain cutting and sweeping force, which can peel off and remove the viscous matter attached to the wall of the filter element. The removed debris is discharged through the bottom drain pipe. After the compressed air sweep is completed, the water flow is backwashed through the water pipe to further flush out a small amount of residual debris. This can be done automatically online without shutting down the system, and it will not hinder the operation of the exhaust gas treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 For this utility model Figure 1 Cross-section of the filter;

[0018] Figure 4It is a top view of the filter in the utility model.

[0019] In the figure: 1. Spray tower; 2. Ring plate; 6. Water inlet pipe; 10. Filter; 11. Connecting rod mechanism; 12. Screw handwheel; 13. Cover plate; 14. Quick-connect pipe; 15. Nozzle; 17. Housing; 18. Filter element; 22. Drain pipe; 24. Base; 26. Water guide pipe; 28. Vertical centrifugal water pump; 30. Pressure gauge. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 A filter for a circulating water pipeline of a spray tower in this embodiment includes a spray tower 1 and a filter 10, a vertical centrifugal water pump 28 and a plurality of valves connected in series through a water inlet pipe 6, the water guide end of the water inlet pipe 6 is connected to the spray pipe in the spray tower 1, and the water outlet pipe is connected to the return water tank in the spray tower 1, a pressure gauge 30 is installed on the side of the water inlet pipe 6 close to the vertical centrifugal water pump 28, the filter 10 includes a shell 17 and a sewage pipe 22 connected to the bottom of the shell 17, a valve is installed on the sewage pipe 22, the top of the shell 17 is covered with a cover plate 13, a protruding end is formed at the bottom of the cover plate 13, a filter element 18 is clamped on the outer side of the protruding end, a ring plate 2 is clamped on the bottom of the inner side of the filter element 18, the bottom of the ring plate 2 is connected to the water outlet end of the shell 17, and at least four nozzles 15 in an inclined state are installed on the top of the cover plate 13.

[0022] In the above structure, the wastewater is guided to the filter through the water inlet pipe to complete the filtration. After long-term use, sticky substances will adhere to the outside of the filter element, which will affect the filtering effect. When the pressure gauge pointer drops below 0.23MP, the filter automatically enters the compressed air cleaning, blowing and backwashing state. At the same time, the valve is closed and the drain pipe is opened. Under the blowing of the nozzle, the sticky substances on the filter element are blown off, and then the cleaning is completed by exporting them through the drain pipe. Therefore, online automatic cleaning can be achieved without the need to shut down the system, which will not hinder the operation of waste gas treatment.

[0023] Among them, a water pipe 26 is installed on the outside of the water inlet pipe 6 near the water outlet end of the housing 17, and a valve is installed on the water pipe 26. After the purge time is 10s, it automatically enters the backwash state, the valve is opened, and the external water source is introduced through the water pipe to achieve reverse water inflow, and the debris remaining on the filter element is flushed for 20s and then closed, and then all valves are automatically restored to normal operation.

[0024] In addition, the ring plate 2 is in a boss shape, and sealing strips are embedded and installed on the minimum diameter of the ring plate 2 and the cover plate 13 and the bottom of the cover plate 13. The plate surface of the ring plate with the largest diameter is tightly attached to the bottom of the filter element, and at the same time, it cooperates with the sealing strip to prevent water from leaking out of the housing and leaking through the top or bottom of the filter element, thereby preventing internal penetration and external water leakage, and improving the sealing performance.

[0025] In addition, at least four bases 24 are fixedly mounted on the top of the cover plate 13, the nozzle 15 is threadedly mounted on the bottom of the base 24, and a quick-connect pipe 14 connected to an external air compressor is mounted on the top of the base 24, the quick-connect pipe 14 is connected to the nozzle 15, and the nozzle 15 has a flat mouth. Because the shape of the nozzle is flat, an angle is formed between the nozzle and the filter element, and the ejected gas is in the shape of a flat fan, which can cover the entire filter element mesh wall, thereby facilitating the purge of viscous substances attached to the mesh wall. At the same time, when the nozzle needs to be cleaned, because the quick-connect pipe is connected to the nozzle, and the nozzle is threadedly connected to the base, the quick-connect pipe can be rotated to separate the nozzle from the base for maintenance.

[0026] When the filter element needs to be disassembled, the left side of the housing 17 is fixed with a side block and the right side is hinged with a connecting rod mechanism 11 that is clamped with the side block. The top of the cover plate 13 is rotatably connected with a screw hand wheel 12. The outer side of the screw hand wheel 12 is threadedly connected with a nut, which is embedded in the cross bar of the connecting rod mechanism 11. By clamping the hook of the connecting rod mechanism under the side block and then rotating the screw hand wheel, the nut will move upward, thereby driving the cross bar end of the connecting rod mechanism to move upward, so that the hook of the connecting rod mechanism fits more closely with the side block, so that the cover plate can be fixed, and the screw hand wheel is rotated in the opposite direction, so that the connecting rod mechanism can be separated from the side block, and the cover plate is opened to take out the filter element for replacement or maintenance.

[0027] The working principle of the above embodiment is:

[0028] Through the combination of the vertical centrifugal water pump and the water inlet pipe, the wastewater in the return water tank on the spray tower can be pumped out, filtered after passing through the filter, and then introduced into the spray pipe in the spray tower through the water inlet pipe to achieve circulation. After one end of the cycle, sticky substances will adhere to the outer surface of the filter element in the filter. When the pressure gauge pointer drops below 0.23MP, the filter automatically enters the compressed air cleaning, blowing and backwashing state, all valves are closed, the vertical centrifugal water pump stops running, only the valve on the drain pipe is opened, and then the external air compressor passes the compressed air through the quick-connect pipe, and the compressed air from the nozzle is instantly injected. Because the nozzle is a flat slit and is inclined, the filter element wall forms an angle, which is conducive to blowing away the sticky substances attached to the mesh wall. Since the compressed air formed by the four nozzles is flat fan-shaped, it can cover the entire filter element mesh wall. The dirt after purging is discharged from the bottom drain pipe. After the compressed air purging time is 10s, it automatically enters the backwash state. The valve of the water pipe is opened, and the tap water enters the water inlet pipe through the water pipe, and then enters from the water outlet end of the filter, that is, countercurrent water inflow, flushes the debris remaining on the filter element wall, and then closes after 20s, and then restores the normal operation of all valves.

[0029] When the filter element needs to be removed for replacement or maintenance, the screw handwheel is turned to drive the connecting rod mechanism downward through the nut, so that the hook of the connecting rod mechanism is separated from the side block, so that the cover plate can be opened and the filter element can be taken out at the same time.

[0030] In summary, the filter has the following characteristics:

[0031] 1. The filter area is large, the ratio of the filter area to the pipe cross-sectional area is ≥10, the anti-clogging ability is strong, and the cleaning cycle is long;

[0032] 2. High filter element cleaning efficiency. The system does not stop or disassemble when cleaning the filter element, achieving online cleaning and maintenance, and improving the operating efficiency of the main equipment. Water enters from the outside of the filter cylinder and exits from the inside, making it easy to clean;

[0033] 3. Completely clean the filter element. Use the strong airflow formed by the flat nozzle of compressed air. The airflow is fan-shaped and has an angle with the filter screen, forming a certain cutting and sweeping force, which can remove the sticky material attached to the filter screen wall. The removed debris is discharged through the bottom sewage pipe. After the compressed air purge is completed, it is backwashed with water flow to further flush out a small amount of residual debris;

[0034] 4. Simple structure and easy maintenance. The cover adopts connecting rod and lead screw structure, the filter element can be quickly disassembled, and the cylinder and filter element adopt rubber sealing ring, which is easy to install firmly without internal penetration and external leakage;

[0035] 5. The source of compressed air is convenient, because there is basically a compressed air source at the waste gas treatment site.

[0036] The entire workflow is completed, and the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0037] It should be noted that in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter for a circulating water pipeline of a spray tower, comprising a spray tower (1) and a filter (10), a vertical centrifugal water pump (28) and a plurality of valves connected in series via a water inlet pipe (6), characterized in that: A pressure gauge (30) is installed on the side of the water inlet pipe (6) close to the vertical centrifugal water pump (28). The filter (10) comprises a housing (17) and a sewage pipe (22) connected to the bottom of the housing (17). A cover plate (13) is arranged on the top of the housing (17). A protruding end is formed at the bottom of the cover plate (13). A filter element (18) is clamped on the outer side of the protruding end. A ring plate (2) is clamped on the bottom of the filter element (18). The bottom of the ring plate (2) is connected to the water outlet end of the housing (17). A plurality of nozzles (15) in an inclined state are installed on the top of the cover plate (13).

2. The filter for the circulating water pipeline of a spray tower according to claim 1, characterized in that: The ring plate (2) is in the form of a boss, and a sealing strip is embedded in the minimum diameter of the ring plate (2) and the cover plate (13) and the bottom of the cover plate (13).

3. The filter for the circulating water pipeline of a spray tower according to claim 1, characterized in that: A plurality of bases (24) are installed on the top of the cover plate (13), the nozzle (15) is installed at the bottom of the base (24), a quick-connect pipe (14) connected to an external air compressor is installed on the top of the base (24), and the nozzle (15) has a flat mouth.

4. The filter for the circulating water pipeline of a spray tower according to claim 1, characterized in that: A side block and a connecting rod mechanism (11) are fixed to one side of the housing (17), one end of the connecting rod mechanism (11) is clamped with the side block, the top of the cover plate (13) is rotatably connected to a screw hand wheel (12), the outer side of the screw hand wheel (12) is threadedly connected to a nut, and the nut is embedded in the interior of the cross bar of the connecting rod mechanism (11).

5. The filter for the circulating water pipeline of a spray tower according to claim 1, characterized in that: A water guide pipe (26) is installed on the outer side of the water inlet pipe (6) near the water outlet end of the housing (17).

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