A lime slurry filtering device

Abstract

The utility model discloses a lime mortar filtering device, including filter box and air blow subassembly, be equipped with liquid inlet and liquid outlet on the filter box, be equipped with filter piece in the filter box, air blow subassembly is used for the lime mortar in filter box air blow to increase the lime mortar's disturbance. The lime mortar filtering device of the utility model has the advantages of simple structure, can reduce the frequency of manual cleaning and good cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration and purification technology, and in particular to a lime slurry filtration device. Background Technology

[0002] Currently, waste incineration power plants widely use lime slurry for flue gas desulfurization. It has high desulfurization efficiency, mature technology and low raw material cost. However, lime slurry is prone to deposit and scale in the pipeline. The outlet filter screen of the lime slurry preparation tank is often blocked by cement in the lime slurry, resulting in a decrease in outlet flow. Frequent manual cleaning is required, which consumes a lot of manpower. In addition, there may be problems such as lime slurry overflow and pollution of the site environment during the cleaning process.

[0003] Chinese patent document CN216878159U discloses a device for cleaning impurities from lime slurry. An air chamber is positioned above the opening of a filter screen. Compressed air from the air chamber is blown into the filter screen through the opening, blowing away impurities from the outer surface of the screen to clean it. The applicant has found some drawbacks in this technical solution:

[0004] 1) After the calcium hydroxide particles in the lime slurry react with water, they form a cementitious substance. This cementitious substance easily forms a strong adhesive layer on the surface of the filter screen. It has strong adhesion and is difficult to completely peel off by the shearing force generated by direct air blowing, resulting in poor cleaning effect.

[0005] 2) When cleaning the filter screen, the filter device needs to be stopped, and it cannot be cleaned online. After the machine is stopped, the adhesive on the filter screen will react with carbon dioxide when it comes into contact with the air to form a calcium carbonate hard scale layer with a Mohs hardness of up to 3. It is difficult to clean with air blowing, and the cleaning effect is even worse. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a lime slurry filtration device with simple structure, which can reduce the frequency of manual cleaning and has a good cleaning effect.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A lime slurry filtration device includes a filter box and an air blowing assembly. The filter box is provided with an inlet and an outlet, and a filter element is provided inside the filter box. The air blowing assembly is used to blow air into the lime slurry in the filter box to increase the agitation of the lime slurry.

[0009] As a further improvement to the above technical solution:

[0010] The air blowing assembly includes a first pipe and a second pipe. The outlet of the first pipe is located inside the filter element, and the inlet is connected to the outlet of the second pipe. The inlet of the second pipe is connected to the air supply element.

[0011] The first pipe is connected to the second pipe via a flexible hose.

[0012] The filter box is equipped with a cover on top, and the first pipe extends through the cover into the filter element.

[0013] The second pipeline is equipped with a solenoid valve.

[0014] The lime slurry filtration device also includes a rinsing assembly for online rinsing of the filter elements.

[0015] The flushing assembly includes a flushing pipe, the outlet of which is located below the filter element, and the inlet of which is connected to the water supply element.

[0016] The filter box is also equipped with a drain valve below the filter element.

[0017] The inlet and outlet are located on opposite sides of the filter box. The top of the filter element has an opening, which is arranged at an angle. The high point of the opening is higher than the outlet and the low point is lower than the inlet.

[0018] The opening has an edge portion on its outer periphery, and steps for supporting the edge portion are provided below the liquid inlet and above the liquid outlet.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] 1. The lime slurry filtration device of this utility model uses an air blowing component to blow lime slurry in the filter box, increasing the disturbance of lime slurry and reducing the adhesion of cementitious materials on the filter element, thereby reducing the frequency of manual cleaning. It has a simple structure, saves time and effort. Compared with the technical solution of stopping the machine to clean the filter element by air blowing, cleaning by disturbing the lime slurry makes it less likely for cementitious materials to form a hard scale layer, making it easier to clean and achieving better cleaning results.

[0021] 2. In the lime slurry filtration device of this utility model, the first pipe is prone to vibration due to the flow of lime slurry and the disturbance of compressed gas. By installing a flexible hose between the first pipe and the second pipe, the hose can buffer and isolate the vibration of the first pipe, preventing the second pipe and the air supply component from leaking or being damaged due to vibration.

[0022] 3. The lime slurry filtration device of this utility model can prevent the filter element from becoming clogged by regularly rinsing the bottom of the filter element through the flushing component. The filter element can be cleaned online without stopping the machine, which can prevent the adhesive on the filter element from coming into contact with the air and causing scale formation, and the cleaning effect is good.

[0023] 4. In use, the lime slurry prepared in the lime slurry preparation tank flows into the filter box from the inlet, then into the filter element from the opening, and flows out from the filter hole to the outlet. The inclined arrangement of the openings allows the filtered impurities to remain inside the filter element. The inlet and outlet are located on opposite sides of the filter box, and the top of the filter box is convenient for installing a cover, allowing the cover to be opened periodically to clean the filter element. The layout is reasonable.

[0024] 5. The lime slurry filtration device of this utility model has steps set below the inlet and above the outlet. On the one hand, it can support the filter element and prevent the outer wall of the filter element from contacting the inner wall of the filter box, which would cause the filter holes to become clogged; on the other hand, it can position the filter element so that the filter element can be placed accurately. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the lime slurry filtration device of this utility model.

[0026] Legend: 1. Filter box; 11. Liquid inlet; 12. Liquid outlet; 13. Box cover; 14. Step; 15. Drain valve; 2. Air blowing assembly; 21. First pipe; 22. Second pipe; 221. Solenoid valve; 23. Hose; 3. Filter element; 31. Opening; 32. Edge; 4. Flushing assembly; 41. Flushing pipe. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] like Figure 1 As shown, the lime slurry filtration device of this embodiment includes a filter box 1 and an air blowing assembly 2. The filter box 1 is provided with an inlet 11 and an outlet 12. The filter box 1 is provided with a filter element 3. The air blowing assembly 2 is used to blow air into the lime slurry in the filter box 1 to increase the disturbance of the lime slurry.

[0032] In this embodiment of the lime slurry filtration device, the lime slurry prepared in the lime slurry preparation tank flows into the filter box 1 through the inlet 11. The air blowing component 2 blows air into the lime slurry in the filter box 1 to increase the agitation of the lime slurry and clean the cementitious material on the filter element 3. After being filtered by the filter element 3, the lime slurry flows out from the outlet 12 to the downstream equipment. This embodiment of the lime slurry filtration device, by using the air blowing component 2 to blow air into the lime slurry in the filter box 1, increases the agitation of the lime slurry, reduces the adhesion of cementitious material to the filter element 3, and thus reduces the frequency of manual cleaning. It has a simple structure, saves time and labor. Compared with the technical solution of stopping the machine to clean the filter element 3 by air blowing, cleaning by agitating the lime slurry makes it less likely for cementitious material to form a hard scale layer, making it easier to clean and resulting in better cleaning effect.

[0033] Furthermore, in this embodiment, the air-blowing assembly 2 includes a first pipe 21 and a second pipe 22. The outlet of the first pipe 21 is located inside the filter element 3, and its inlet is connected to the outlet of the second pipe 22. The inlet of the second pipe 22 is connected to the air supply component. The air supply component (i.e., an external air source, not shown in the figure) provides compressed gas at 0.5 MPa. The compressed gas passes through the first pipe 21 and the second pipe 22 into the filter element 3, increasing the disturbance of the lime slurry in the filter box 1, thereby reducing the adhesion of cementitious materials on the filter element 3. The structure is simple and reliable.

[0034] Preferably, in this embodiment, a manual valve is also provided between the second pipe 22 and the gas supply component.

[0035] Furthermore, in this embodiment, the first pipe 21 is connected to the second pipe 22 via a flexible hose 23. Due to the flow of lime slurry and the disturbance of compressed gas, the first pipe 21 is prone to vibration. By installing the flexible hose 23 between the first pipe 21 and the second pipe 22, the flexible hose 23 can buffer and isolate the vibration of the first pipe 21, preventing the second pipe 22 and the gas supply component from leaking or being damaged due to vibration.

[0036] Furthermore, in this embodiment, the top of the filter box 1 is provided with a cover 13, and the first pipe 21 extends through the cover 13 into the filter element 3. By removing the cover 13, the filter element 3 can be placed in or removed to clean the impurities in the filter element 3, which is convenient. Moreover, since the cover 13 needs to be installed or removed when the filter element 3 is placed in or removed, the flexible hose 23 can adapt to the installation and removal of the cover 13, without the need to install or remove the first pipe 21 or the second pipe 22, making the operation even more convenient.

[0037] Preferably, in this embodiment, the filter element 3 is provided with a handle for easy handling.

[0038] Furthermore, in this embodiment, a solenoid valve 221 is provided on the second pipe 22. The supply of compressed air can be controlled by remotely controlling the opening and closing of the solenoid valve 221, which is convenient and flexible to operate.

[0039] Preferably, in this embodiment, a detection component for detecting whether lime slurry is flowing through is provided at the liquid inlet 11. The solenoid valve 221 is connected to the detection component. When the detection component detects that lime slurry is flowing through the liquid inlet 11, it opens the solenoid valve 221 and introduces compressed air into the filter box 1 for air blowing, which has a high degree of automation.

[0040] Furthermore, in this embodiment, the lime slurry filtration device also includes a flushing assembly 4 for online flushing of the filter element 3. Although the agitation by the air blowing assembly 2 can reduce the adhesion of cementitious materials on the filter element 3, a small amount of slurry will still deposit at the bottom of the filter element 3 and form scale during long-term operation. The flushing assembly 4 can periodically flush the bottom of the filter element 3 to prevent the filter element 3 from becoming clogged. Specifically, during flushing, the filter box 1 operates normally to filter lime slurry, and the flushing assembly 4 introduces clean water into the filter box 1 to clean the filter element 3. Online cleaning of the filter element 3 can be achieved without stopping the machine, which can prevent the cementitious materials on the filter element 3 from contacting the air and forming scale, resulting in a good cleaning effect.

[0041] Furthermore, in this embodiment, the rinsing assembly 4 includes a rinsing pipe 41, the outlet of which is located below the filter element 3, and the inlet of which is connected to the water supply unit. The water supply unit (i.e., an external water source, not shown in the figure) provides clean water, which is sprayed through the rinsing pipe 41 towards the bottom of the filter element 3 for cleaning. The structure is simple and reliable.

[0042] Preferably, in this embodiment, a manual valve is also provided between the flushing pipe 41 and the water supply component.

[0043] Furthermore, in this embodiment, a drain valve 15 is also provided below the filter element 3 in the filter box 1. Opening the drain valve 15 can discharge the deposited dirt in the filter box 1, thereby maintaining the cleanliness of the filter box 1.

[0044] Furthermore, in this embodiment, the inlet 11 and outlet 12 are located on both sides of the filter box 1, and the top of the filter element 3 is provided with an opening 31. The opening 31 is arranged at an angle, with its high point higher than the outlet 12 and its low point lower than the inlet 11. In use, the lime slurry prepared in the lime slurry preparation tank flows into the filter box 1 from the inlet 11, then into the filter element 3 from the opening 31, and flows out from the filter holes of the filter element 3 to the outlet 12. The angled arrangement of the opening 31 ensures that the filtered impurities remain inside the filter element 3. Furthermore, the inlet 11 and outlet 12 are located on both sides of the filter box 1, and the top of the filter box 1 is convenient for arranging the cover 13, allowing the cover 13 to be opened periodically to clean the filter element 3. The layout is reasonable.

[0045] Furthermore, in this embodiment, the outer periphery of the opening 31 is provided with an edge portion 32, and steps 14 for supporting the edge portion 32 are respectively provided below the liquid inlet 11 and above the liquid outlet 12. By providing steps 14 below the liquid inlet 11 and above the liquid outlet 12, on the one hand, the filter element 3 can be supported to prevent the outer wall of the filter element 3 from contacting the inner wall of the filter box 1, which would cause the filter holes to become clogged; on the other hand, the filter element 3 can be positioned to facilitate accurate placement of the filter element 3.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the spirit and technical solution of the present utility model. Therefore, any simple modifications, equivalent substitutions, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A lime slurry filtration device, characterized in that: It includes a filter box (1) and an air blowing assembly (2). The filter box (1) is provided with an inlet (11) and an outlet (12). The filter box (1) is provided with a filter element (3). The air blowing assembly (2) is used to blow the lime slurry in the filter box (1) to increase the disturbance of the lime slurry. The air blowing assembly (2) includes a first pipe (21) and a second pipe (22). The outlet of the first pipe (21) is located inside the filter element (3), and the inlet is connected to the outlet of the second pipe (22). The inlet of the second pipe (22) is connected to the air supply element.

2. The lime slurry filtration device according to claim 1, characterized in that: The first pipe (21) is connected to the second pipe (22) via a flexible hose (23).

3. The lime slurry filtration device according to claim 2, characterized in that: The filter box (1) is provided with a cover (13) on the top, and the first pipe (21) extends through the cover (13) into the filter element (3).

4. The lime slurry filtration device according to claim 1, characterized in that: The second pipe (22) is equipped with a solenoid valve (221).

5. The lime slurry filtration device according to claim 1, characterized in that: The lime slurry filtration device also includes a rinsing assembly (4) for online rinsing of the filter element (3).

6. The lime slurry filtration device according to claim 5, characterized in that: The flushing assembly (4) includes a flushing pipe (41), the outlet of which is located below the filter element (3), and the inlet of which is connected to the water supply element.

7. The lime slurry filtration device according to claim 1, characterized in that: The filter box (1) is also provided with a drain valve (15) below the filter element (3).

8. The lime slurry filtration device according to any one of claims 1 to 7, characterized in that: The inlet (11) and outlet (12) are located on both sides of the filter box (1). The top of the filter element (3) is provided with an opening (31). The opening (31) is arranged at an angle. The high point of the opening (31) is higher than the outlet (12) and the low point is lower than the inlet (11).

9. The lime slurry filtration device according to claim 8, characterized in that: The opening (31) has an edge portion (32) on its outer periphery, and steps (14) for supporting the edge portion (32) are provided below the liquid inlet (11) and above the liquid outlet (12).

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