Filtering device of cyclone and flue gas desulfurization system

Abstract

The utility model discloses a filtering device of a cyclone and a flue gas desulfurization system. The filtering device of the swirler comprises a filtering part, the first end of a pollution discharge section filtering part is communicated with an intermediate storage tank, and the second end of the pollution discharge section filtering part is connected with a liquid inlet of the swirler; one end of the pollution discharge section is connected with the third end of the pollution discharge section filtering part, and the other end of the pollution discharge section is communicated with a floor drain pipeline. Through the arrangement of the filtering device, gypsum slurry is filtered in advance, large-particle impurities are left in the filtering device to be discharged, the blockage time of the cyclone can be greatly prolonged, the cleaning intensity of workers can be reduced, the working efficiency is improved, meanwhile, the filtering device is simple in structure, the filtering device is more convenient to wash, and the practicability is high. Therefore, the working efficiency of the flue gas desulfurization system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gypsum cyclone anti-blocking, in particular to a cyclone filtering device and a flue gas desulfurization system. Background Art

[0002] At present, most coal-fired power plants use limestone-gypsum wet flue gas desulfurization to convert gaseous sulfur dioxide or sulfur trioxide in the flue gas into solid gypsum. In the gypsum dehydration process, the cyclone is generally the first-level dehydration equipment of the gypsum slurry. Under certain pressure and flow conditions provided by the gypsum discharge pump, the large-particle gypsum flows from the bottom sand settling nozzle to the second-level dehydration equipment through the cyclone. Problems with the cyclone directly affect the second-level dehydration and affect the quality of gypsum.

[0003] The existing cyclones are often clogged during operation, causing the system to fail to operate and affecting the subsequent secondary dehydration. The filter device of the existing cyclone has a complex structure and is not easy to clean, which in turn affects the working efficiency of the flue gas desulfurization system. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0005] In view of this, the utility model provides a cyclone filtering device and a flue gas desulfurization system, wherein the cyclone filtering device can filter the gypsum slurry in advance through the setting of the filtering device, leaving large particles of impurities in the filtering device to be discharged, which can greatly extend the blockage time of the cyclone, and can also reduce the cleaning intensity of the staff and improve the work efficiency. At the same time, the structure of the filtering device is simple, and the flushing of the filtering device is more convenient, thereby ensuring the working efficiency of the flue gas desulfurization system.

[0006] Specifically, the following technical solutions are included:

[0007] An embodiment of the first aspect of the present utility model provides a cyclone filtering device, the filtering device comprising:

[0008] A filter unit, wherein a first end of the filter unit is connected to the intermediate storage tank, and a second end of the filter unit is connected to the liquid inlet of the cyclone;

[0009] A sewage discharge section, one end of which is connected to the third end of the filter portion, and the other end of which is communicated with a floor drain pipe.

[0010] Optionally, the filter part includes an outer cylinder and a filter cylinder fixedly arranged in the outer cylinder, the outer cylinder is provided with an inlet pipe, the inlet pipe is connected to the intermediate storage tank, the outer cylinder is provided with an outlet pipe, the outlet pipe is connected to the liquid inlet of the cyclone, and the sewage discharge section is connected to one end of the outer cylinder; the inlet pipe and the outlet pipe are arranged close to one end of the sewage discharge section.

[0011] Optionally, the filtering device further comprises:

[0012] A clamping plate is arranged on the inner wall of the outer cylinder or the clamping plate is arranged on the outer wall of the filter cylinder;

[0013] The first groove matches the clamping plate, and correspondingly, the first groove is arranged on the outer wall of the filter cylinder or the first groove is arranged on the inner wall of the outer cylinder.

[0014] Optionally, the diameter of the inlet pipe is greater than the diameter of the outlet pipe.

[0015] Optionally, the filter cartridge includes a first filter cartridge and a second filter cartridge, the first filter cartridge is externally mounted on the second filter cartridge, the first filter cartridge is fixedly connected to the second filter cartridge, and the filter hole diameter of the first filter cartridge is larger than the filter hole diameter of the second filter cartridge.

[0016] Optionally, a blind plate is provided on the outer cylinder, the blind plate is arranged opposite to the sewage discharge section, and the blind plate is fixedly connected to the outer cylinder through a flange.

[0017] Optionally, the sewage discharge section comprises:

[0018] A transition section is in a boss shape, and a large-mouth end of the transition section is connected to the third end of the filter portion;

[0019] A sewage pipe is connected to the small-mouth end of the transition section, one end of the sewage pipe away from the transition section is connected to the floor drain pipe, and a first valve is provided at one end of the sewage pipe close to the transition section.

[0020] Optionally, the filtering device further comprises:

[0021] A vibrator is connected to the filter unit.

[0022] Optionally, the filter cartridge is made of 2205 bidirectional stainless steel.

[0023] An embodiment of the second aspect of the utility model provides a flue gas desulfurization system, the flue gas desulfurization system comprising:

[0024] The filtering device of the above-mentioned cyclone.

[0025] The embodiment of the utility model provides a cyclone filter device and a flue gas desulfurization system, wherein the cyclone filter device includes a filter part and a sewage discharge section, the sewage discharge section is arranged on the third end of the filter part, the first end of the filter part is connected to the intermediate storage tank, and the second end of the filter part is connected to the liquid inlet of the cyclone. Through such an arrangement, the gypsum slurry in the intermediate storage tank can pass through the filter part and then enter the cyclone, which plays a preliminary filtering role on the gypsum slurry, and leaves large particles of impurities in the filter device to be discharged, which can greatly extend the blockage time of the cyclone, and can also reduce the cleaning intensity of the staff and improve the work efficiency. At the same time, the structure of the filter device is simple, and the flushing of the filter device is more convenient, thereby ensuring the working efficiency of the flue gas desulfurization system. When the filter device needs to be cleaned, the sewage is discharged and cleaned through the sewage discharge section, which greatly shortens the shutdown time for cleaning and improves the working efficiency of the entire desulfurization system.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of a cyclone filtering device according to an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the connection between the outer cylinder and the filter cylinder according to an embodiment of the utility model;

[0030] Figure 3 It is a schematic diagram of the connection between the outer cylinder, the first filter cylinder and the second filter cylinder according to an embodiment of the utility model.

[0031] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0032] 100 filtering device, 110 filtering part, 111 outer cylinder, 112 filtering cylinder, 1121 first filtering cylinder, 1122 second filtering cylinder, 113 inlet pipe, 114 outlet pipe, 115 clamping plate, 116 blind plate, 117 first groove, 118 second groove, 120 sewage section, 121 transition section, 122 sewage pipe, 123 first valve. DETAILED DESCRIPTION

[0033] 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 part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0034] Before further describing the embodiments of the present invention in detail, the directional terms involved in the embodiments of the present invention, such as "upper part", "lower part" and "side part", do not have the meaning of limiting the protection scope of the present invention.

[0035] In order to make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0036] Figure 1 It is a schematic diagram of a cyclone filtering device according to an embodiment of the utility model.

[0037] like Figure 1 As shown, an embodiment of the utility model provides a cyclone filtering device 100, the filtering device 100 comprising:

[0038] A filter unit 110, wherein a first end of the filter unit 110 is connected to the intermediate storage tank, and a second end of the filter unit 110 is connected to a liquid inlet of the cyclone;

[0039] The sewage discharge section 120 has one end connected to the third end of the filter unit 110, and the other end of the sewage discharge section 120 is connected to the floor drain pipe.

[0040] Among them, the filter device 100 of the cyclone includes a filter part 110 and a sewage discharge section 120. The sewage discharge section 120 is arranged on the third end of the filter part 110. The first end of the filter part 110 is connected to the intermediate storage tank, and the second end of the filter part 110 is connected to the liquid inlet of the cyclone. Through such an arrangement, the gypsum slurry in the intermediate storage tank can pass through the filter part 110 and then enter the cyclone, which plays a preliminary filtering role on the gypsum slurry, and leaves large particles of impurities in the filter device 100 to be discharged, which can greatly extend the blockage time of the cyclone, and can also reduce the cleaning intensity of the staff and improve the work efficiency. At the same time, the structure of the filter device 100 is simple, and the flushing of the filter device 100 is more convenient, thereby ensuring the working efficiency of the flue gas desulfurization system. When the filter device 100 needs to be cleaned, the sewage is discharged and cleaned through the sewage discharge section 120, which greatly shortens the shutdown time for cleaning and improves the working efficiency of the entire desulfurization system.

[0041] Specifically, the filter unit 110 is arranged between the intermediate storage tank and the cyclone, and the gypsum slurry entering the cyclone is firstly filtered to prevent large particles of impurities from clogging the cyclone of the cyclone and affecting the normal use of the cyclone. The large particles of impurities are filtered and stay in the filter unit 110. When the filter unit 110 needs to be cleaned, only the second end of the filter unit 110, that is, the end connected to the cyclone, is closed, and then the third end of the filter unit 110 is opened to discharge the impurities into the floor drain pipe through the sewage discharge section 120 for subsequent treatment. After the filter device 100 is cleaned, the filter unit 110 is closed. 0, open the second end of the filter unit 110, and the dehydration system in the flue gas desulfurization system is used normally; or first close the first end of the filter unit 110 and the second end of the filter unit 110, and open the third end of the filter unit 110 at the same time, clean the filter unit 110 through the sewage section 120, and then close the third end of the filter unit 110, open the first end of the filter unit 110 and the second end of the filter unit 110. Since the filter unit 110 has a simple structure and is directly connected to the sewage section 120, the cleaning time is 1 minute to 3 minutes, which greatly shortens the shutdown time for cleaning.

[0042] In a feasible embodiment, the filter part 110 includes an outer cylinder 111 and a filter cylinder 112 fixedly arranged in the outer cylinder 111, an inlet pipe 113 is provided on the outer cylinder 111, the inlet pipe 113 is connected to the intermediate storage tank, an outlet pipe 114 is provided on the outer cylinder 111, the outlet pipe 114 is connected to the liquid inlet of the cyclone, and the sewage discharge section 120 is connected to one end of the outer cylinder 111; the inlet pipe 113 and the outlet pipe 114 are arranged close to one end of the sewage discharge section 120.

[0043] Among them, the filter part 110 includes an outer cylinder 111 and a filter cylinder 112 arranged in the outer cylinder 111. The relevant dimensions of the outer cylinder 111 and the filter cylinder 112 can be obtained according to the flow rate of the desulfurization system. Usually, the outer diameter of the outer cylinder 111 is 500mm to 550mm, the wall thickness of the outer cylinder 111 is 8mm to 12mm, and the height of the outer cylinder 111 is 600mm to 800mm. In this application, the outer diameter of the outer cylinder 111 is 530mm, the wall thickness of the outer cylinder 111 is 10mm, and the height of the outer cylinder 111 is 700mm; the outer diameter of the filter cylinder 112 is 460mm to 490mm, the wall thickness of the filter cylinder 112 is 4mm to 6mm, and the height of the filter cylinder 112 is 550mm to 750mm. In this application, the outer diameter of the filter cylinder 112 is 470mm, the wall thickness of the filter cylinder 112 is 5mm, and the height of the filter cylinder 112 is 650mm. It can be seen that there is a certain distance between the outer cylinder 111 and the filter cylinder 112, which is convenient for the storage of impurities and helps to fully filter large impurities in the gypsum slurry. The gypsum slurry in the intermediate storage tank enters the outer cylinder 111 and the filter cylinder 112 in turn through the inlet pipe 113, and the filtered slurry enters the cyclone through the outlet pipe 114, avoiding large particle impurities from clogging the cyclones in the cyclone and affecting the normal operation of the desulfurization system.

[0044] Optionally, large impurities refer to impurities with a diameter ranging from 8mm to 12mm or more, which are blocked by the filter holes of the filter cartridge 112. The aperture of the cyclone sand settling nozzle is 18mm, so the remaining impurities will not block the sand settling nozzle, that is, will not block the cyclone, thereby ensuring the normal operation of the cyclone.

[0045] It should be noted that a second valve is provided on the inlet pipe 113 and a third valve is provided on the outlet pipe 114 to facilitate closing of the filter device 100 when the filter device 100 is backwashed.

[0046] In a feasible implementation manner, the diameter of the inlet pipe 113 is greater than the diameter of the outlet pipe 114 .

[0047] Among them, the outer diameter of the inlet pipe 113 is usually 260mm to 280mm, and the outer diameter of the outlet pipe 114 is 210mm to 230mm. That is to say, the diameter of the inlet pipe 113 is larger than the diameter of the outlet pipe 114. This arrangement allows the incoming gypsum slurry to be fully filtered under the action of the filter cartridge 112, effectively preventing large particles of impurities from entering the cyclone, ensuring the service life of the cyclone, and thereby improving the working efficiency of the desulfurization system.

[0048] Figure 2 It is a schematic diagram of the connection between the outer cylinder and the filter cylinder according to an embodiment of the utility model.

[0049] In a possible implementation, Figure 2As shown, the filtering device 100 further includes:

[0050] The clamping plate 115 is disposed on the inner wall of the outer cylinder 111 or the clamping plate 115 is disposed on the outer wall of the filter cylinder 112;

[0051] The first groove 117 matches with the clamping plate 115 , and correspondingly, the first groove 117 is disposed on the outer wall of the filter cartridge 112 or the first groove 117 is disposed on the inner wall of the outer cartridge 111 .

[0052] The outer cylinder 111 and the filter cylinder 112 can be connected by a clamping plate 115, which is convenient for disassembly and flushing. Specifically, a clamping plate 115 is provided on the inner wall of the outer cylinder 111, and a first groove 117 is provided on the corresponding outer wall position of the filter cylinder 112. The outer cylinder 111 and the filter cylinder 112 are fixedly connected by the clamping of the clamping plate 115 and the first groove 117. Alternatively, a clamping plate 115 is provided on the outer wall of the filter cylinder 112, and a first groove 117 is provided on the corresponding inner wall position of the outer cylinder 111. The outer cylinder 111 and the filter cylinder 112 are fixedly connected by the clamping of the clamping plate 115 and the first groove 117. It is understandable that the clamping plate 115 can be a whole annular clamping plate, or a plurality of rectangular plates evenly provided on the circumference of the outer cylinder 111 or the filter cylinder 112, which is not limited here.

[0053] It should be noted that the outer cylinder 111 and the filter cylinder 112 can also be connected by welding. Specifically, a ring plate or a connecting plate is provided between the outer cylinder 111 and the filter cylinder 112. The outer cylinder 111 is welded to the ring plate, and the ring plate is welded to the filter cylinder 112; or the outer cylinder 111 is welded to the connecting plate, and the connecting plate is welded to the filter cylinder 112, so as to achieve a fixed connection between the outer cylinder 111 and the filter cylinder 112.

[0054] It can be understood that, whether it is a detachable connection or welding, the connecting components (clamp plate 115, first groove 117, ring plate, connecting plate) must be set away from the filter holes of the filter cartridge 112. At the same time, in order to ensure the reliability and stability of the fixed connection between the outer cylinder 111 and the filter cartridge 112, a plurality of layers of connecting components are usually arranged from the end away from the sewage discharge section 120 to the sewage discharge section 120.

[0055] Figure 3 It is a schematic diagram of the connection between the outer cylinder, the first filter cylinder and the second filter cylinder according to an embodiment of the utility model.

[0056] In a possible implementation, Figure 3As shown, the filter cartridge 112 includes a first filter cartridge 1121 and a second filter cartridge 1122 . The first filter cartridge 1121 is externally mounted on the second filter cartridge 1122 . The first filter cartridge 1121 is fixedly connected to the second filter cartridge 1122 . The filter hole diameter of the first filter cartridge 1121 is larger than the filter hole diameter of the second filter cartridge 1122 .

[0057] Among them, the filter cartridge 112 may include two layers, namely, a first filter cartridge 1121 and a second filter cartridge 1122. In the present application, the first filter cartridge 1121 is placed outside the second filter cartridge 1122, namely, the outer diameter of the second filter cartridge 1122 is smaller than the outer diameter of the first filter cartridge 1121, and there is a spacing of 40 mm to 60 mm between the first filter cartridge 1121 and the second filter cartridge 1122. The arrangement of the two layers of filter cartridges 112 facilitates the filtration of the gypsum slurry and further prolongs the service life of the cyclone. It is understandable that the diameter of the first filter hole of the first filter cartridge 1121 is larger than the diameter of the second filter hole of the second filter cartridge 1122. Generally, the diameter of the first filter hole is 8 mm to 12 mm, and the center distance between two adjacent first filter holes is 18 mm to 22 mm. The diameter of the second filter hole is 6 mm to 10 mm, and the center distance between two adjacent second filter holes is 16 mm to 20 mm. It is also possible to set a single layer of filter cartridge 112, a three-layer filter cartridge 112 or other multi-layer filter cartridges 112, and the selection can be made according to the working pressure of the desulfurization system, and there is no limitation here. It is understandable that when the filter cartridge 112 is two layers, the filter unit 110 can filter impurities larger than 6mm to 10mm, so that the diameter of impurities entering the cyclone is less than 10mm, or even less than 6mm, avoiding the blockage of the sand settling nozzle in the cyclone and ensuring the normal operation of the cyclone.

[0058] It should be noted that the fixed connection between the first filter cartridge 1121 and the outer cartridge 111 is as described above and will not be described in detail. Similarly, the first filter cartridge 1121 and the second filter cartridge 1122 can be detachably connected or welded. Specifically, a clamping plate 115 is provided on the inner wall of the first filter cartridge 1121, and a second groove 118 is provided on the corresponding outer wall position of the second filter cartridge 1122. The first filter cartridge 1121 and the second filter cartridge 1122 are fixedly connected by the clamping of the clamping plate 115 and the second groove 118; or a clamping plate 115 is provided on the outer wall of the second filter cartridge 1122, and a second groove 118 is provided on the corresponding inner wall position of the first filter cartridge 1121. The first filter cartridge 1121 and the second filter cartridge 1122 are fixedly connected by the clamping of the clamping plate 115 and the second groove 118. It is understandable that the clamping plate 115 can be a whole ring-shaped clamping plate, or a plurality of rectangular plates evenly arranged on the circumference of the first filter cartridge 1121 or the second filter cartridge 1122, and no limitation is made here. The welding connection is as described above and will not be described in detail.

[0059] In a feasible implementation manner, a blind plate 116 is provided on the outer cylinder 111 , the blind plate 116 is arranged opposite to the sewage discharge section 120 , and the blind plate 116 is fixedly connected to the outer cylinder 111 via a flange.

[0060] Among them, a blind plate 116 is provided on the outer cylinder 111. The blind plate 116 is arranged at one end of the filter part 110 away from the sewage discharge section 120. The blind plate 116 is fixedly connected to the outer cylinder 111 through a flange. Through the setting of the blind plate 116, other impurities in the air can be prevented from entering the gypsum slurry and affecting the subsequent treatment of the desulfurization system.

[0061] It should be noted that a sealing gasket is provided between the blind plate 116 and the outer cylinder 111 to improve the sealing effect of the blind plate 116 on the filter device 100 .

[0062] In a feasible embodiment, the sewage discharge section 120 includes:

[0063] The transition section 121 is in a boss shape, and the large end of the transition section 121 is connected to the third end of the filter part 110;

[0064] The sewage pipe 122 is connected to the small end of the transition section 121 , one end of the sewage pipe 122 away from the filtering section 121 is connected to the floor drain pipe, and one end of the sewage pipe 122 close to the transition section 121 is provided with a first valve 123 .

[0065] Among them, the transition section 121 is in the shape of a boss, that is, a funnel. Such a setting can reduce the diameter of the sewage pipe 122, that is, reduce the production cost of the filter device 100. On the other hand, it can also make impurities gather at the small mouth end of the transition section 121, and the falling of impurities has a buffering effect, which can effectively extend the service life of the filter device 100.

[0066] It should be noted that the filter device 100 is cleaned by opening the first valve 123, and the filter device 100 is filtered by closing the first valve 123. The height of the transition section 121 is 230 mm to 270 mm.

[0067] In a feasible implementation manner, the filtering device 100 further includes:

[0068] A vibrator (not shown) is connected to the filter unit 110 .

[0069] Among them, a vibrator can be set outside the filter part 110. When cleaning the filter device 100, the vibrator is turned on to remove impurities on the wall of the outer cylinder 111 and the wall of the filter cylinder 112, and discharge them from the sewage discharge section 120 to prevent impurities from adhering to the filter part 110 and affecting the subsequent filtration of the filter part 110. That is, the service life of the filter part 110 can be improved and the single use time of the filter part 110 can be extended.

[0070] In a feasible implementation, the filter cartridge 112 is made of 2205 duplex stainless steel.

[0071] Among them, the material of the filter cartridge 112 is 2205 bidirectional stainless steel, which has good corrosion resistance and erosion resistance, and can effectively improve the service life of the filter cartridge 112. The other parts of the filter device 100 of the present application are made of 316L stainless steel. While ensuring the service life of the filter device 100, it can also reduce the production cost of the filter device 100 and improve the economy of the filter device 100.

[0072] Another embodiment of the present invention provides a flue gas desulfurization system, which includes: the above-mentioned cyclone filtering device 100.

[0073] It should be noted that, since the flue gas desulfurization system of this embodiment includes the above-mentioned filtering device 100, the flue gas desulfurization system has all the advantages of the above-mentioned filtering device 100, which will not be described in detail.

[0074] Comparative Example

[0075] At present, the flue gas desulfurization adopts the limestone-gypsum wet flue gas desulfurization process. In this process, the dehydration system plays a very critical role. The layout of our company's dehydration system is: No. 1, No. 3, and No. 4 desulfurizations share the second-phase dehydration system; No. 2 desulfurization uses a separate dehydration system. Among them, the second-phase dehydration system is the most important, and there are many system failures. Once the second-phase dehydration system fails, the density of No. 1, No. 3, and No. 4 desulfurization towers will increase, affecting the desulfurization efficiency. In severe cases, it will cause the unit to be limited in load. The second-phase dehydration system has four vacuum belt dehydration systems A, B, D, and E. Each belt dehydrator corresponds to a cyclone, and the output of the D and E dehydrators accounts for about 65%. During the period of high load of the unit, the D and E cyclones are frequently blocked. In order to prevent the tower density from increasing and the desulfurization efficiency from decreasing due to the blockage of the cyclone, which in turn limits the load of the unit, the desulfurization maintenance department arranges special personnel to conduct 24-hour uninterrupted inspections and dredges immediately when a blocked cyclone is found, which increases the workload of the staff and affects the efficiency of the desulfurization system. In addition, the blockage of the cyclone in the cyclone will increase the operating pressure of the cyclone. The increased pressure will greatly increase the slurry flow rate in the cyclone, aggravate the wear of the cyclone, and shorten the service life of the cyclone; too high pressure will also make the dehydration effect of the cyclone poor, resulting in high tower density, which in turn affects the load of the unit.

[0076] By adding the filtering device of the present application between the intermediate storage tank after the reaction tower and the cyclone, the blocking time of the cyclone can be extended, that is, the operation time of the cyclone is extended, and the work intensity of the staff is reduced. It can be understood that a filtering device can be added before the D and E cyclones of the second-stage dehydration system, or before the A, B, D, and E cyclones of the second-stage dehydration system, and the selection can be made according to one's own needs, that is, after comprehensive consideration of production conditions and economic efficiency.

[0077] When the filtering device of the present application is not used: when the blockage is serious, the dehydration system needs to be shut down for cleaning approximately every 8 hours, and the dehydration system needs to be shut down for about 4 hours.

[0078] After using the filtering device of the present application, under the same working conditions, it only needs to be cleaned once every 20 days or so, and because the filtering device has added a drain pipe, the dehydration system does not need to be shut down for cleaning, or it can be cleaned after shutting down for 1 to 3 minutes. It can be seen that after adding the filtering device of the present application, the use time of the cyclone can be effectively extended, and at the same time, there is no need for staff to monitor it all the time, which reduces the work intensity of the staff. Since the filtering device has a simple structure, it is also relatively convenient to clean the filtering device, which greatly saves manpower and shortens the system downtime, thereby greatly improving the reliability of the desulfurization system.

[0079] In the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0080] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. The present invention is intended to cover any variation, use, or adaptation of the present invention that follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cyclone filtering device, characterized in that: The filtering device comprises: A filter unit, wherein a first end of the filter unit is connected to the intermediate storage tank, and a second end of the filter unit is connected to the liquid inlet of the cyclone; A sewage discharge section, one end of which is connected to the third end of the filter portion, and the other end of which is communicated with a floor drain pipe; The filter part comprises an outer cylinder and a filter cylinder fixedly arranged in the outer cylinder, the outer cylinder is provided with an inlet pipe, the inlet pipe is communicated with the intermediate storage tank, the outer cylinder is provided with an outlet pipe, the outlet pipe is connected with the liquid inlet of the cyclone, the sewage discharge section is connected with one end of the outer cylinder; the inlet pipe and the outlet pipe are arranged near one end of the sewage discharge section; The filter cartridge comprises a first filter cartridge and a second filter cartridge. The first filter cartridge is externally mounted on the second filter cartridge. The first filter cartridge is fixedly connected to the second filter cartridge. The filter hole diameter of the first filter cartridge is greater than the filter hole diameter of the second filter cartridge.

2. The cyclone filtering device according to claim 1, characterized in that: The filtering device also includes: A clamping plate is arranged on the inner wall of the outer cylinder or the clamping plate is arranged on the outer wall of the filter cylinder; The first groove matches the clamping plate, and correspondingly, the first groove is arranged on the outer wall of the filter cylinder or the first groove is arranged on the inner wall of the outer cylinder.

3. The cyclone filtering device according to claim 1, characterized in that: The diameter of the inlet pipe is greater than the diameter of the outlet pipe.

4. The cyclone filtering device according to claim 1, characterized in that: The outer cylinder is provided with a blind plate, the blind plate is arranged opposite to the sewage discharge section, and the blind plate is fixedly connected to the outer cylinder through a flange.

5. The cyclone filtering device according to claim 1, characterized in that: The sewage discharge section comprises: A transition section is in a boss shape, and a large-mouth end of the transition section is connected to the third end of the filter portion; A sewage pipe is connected to the small-mouth end of the transition section, one end of the sewage pipe away from the transition section is connected to the floor drain pipe, and a first valve is provided at one end of the sewage pipe close to the transition section.

6. The cyclone filtering device according to claim 1, characterized in that: The filtering device also includes: A vibrator is connected to the filter unit.

7. The cyclone filtering device according to any one of claims 1 to 6, characterized in that: The filter cartridge is made of 2205 bidirectional stainless steel.

8. A flue gas desulfurization system, characterized in that: The flue gas desulfurization system comprises: The cyclone filtering device according to any one of claims 1 to 7.

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