A filter device for liquid calcium hydroxide production

Abstract

The utility model discloses be applied to chemical industry production field's a kind of filter device for liquid calcium hydroxide production, by being provided between dissolving box and collection groove annular flexible filter screen, utilize driving motor one, drive belt and transmission pulley cooperation drive annular flexible filter screen transmission belt type horizontal circulation rotation, can carry out dynamic filtration to calcium hydroxide solution, utilize the rotation of annular flexible filter screen and take away filter residue, and realize double-layer filtration, improve filtration effect;The filter residue on annular flexible filter screen is automatically removed by the backflush pipe cooperation flush nozzle setting, without manual cleaning, it is more convenient to use;By being provided on annular flexible filter screen conical filter hole, and the aperture of conical filter hole located annular flexible filter screen upper layer is sequentially reduced from top to bottom, when filtering, the aperture of conical filter hole of lower layer is smaller compared with the aperture of conical filter hole of upper layer, can filter out the filter residue of smaller particle size, and filtration effect is better.

Description

Technical Field

[0001] This utility model relates to the field of chemical production, and in particular to a filtration device for the production of liquid calcium hydroxide. Background Technology

[0002] Calcium hydroxide is a white, powdery solid. When added to water, it forms two layers: the upper aqueous solution is called clear limewater, and the lower suspension is called lime milk or lime slurry. The main methods for preparing calcium hydroxide solution include the dissolution-filtration method, which involves adding calcium hydroxide powder to water, stirring to dissolve it, and then filtering to remove undissolved solids, resulting in a clear solution.

[0003] Regarding filtration devices for the production of liquid calcium hydroxide, a search revealed, for example, a calcium hydroxide purification device with multi-layer filtration function disclosed in patent publication number CN210505610U, comprising an outer box, an inner filter box, and an outer filter box. The outer filter box is fitted outside the inner filter box, and the outer box is fitted outside the outer filter box. Filtration structures are installed on both the inner and outer filter boxes. A stirring structure is installed inside the inner filter box. By filtering the mixed liquid through multi-layer filter screens and bamboo charcoal, other substances can be filtered out to the maximum extent.

[0004] However, in existing technologies, the filter structures used for producing liquid calcium hydroxide, similar to those disclosed above, become increasingly clogged as filtration progresses, leading to filtration difficulties and requiring frequent replacement or disassembly for cleaning, which is quite troublesome. Utility Model Content

[0005] 1. Technical problems to be solved The core of this invention lies in its use of a drive motor, a transmission belt, and a pulley to drive the annular flexible filter screen in a horizontal, belt-like circular rotation, thus solving the problem of frequent filter replacement or disassembly for cleaning in existing technologies. This also achieves dual-layer filtration, improving the filtration effect.

[0006] 2. Technical Solution To solve the above problems, the present invention adopts the following technical solution.

[0007] A filtration device for producing liquid calcium hydroxide includes a support frame, a dissolving tank disposed on the upper side of the support frame, a collecting tank disposed on the lower side of the support frame, and an annular flexible filter screen located between the dissolving tank and the collecting tank. A circulating transmission component is connected between the annular flexible filter screen and the support frame, which causes the annular flexible filter screen to rotate horizontally in a belt-like manner. The dissolving tank and the collection tank are located on the upper and lower sides of the middle of the annular flexible filter screen, respectively. Two sets of auxiliary slag discharge components are also installed on the inner side of the support. One set of auxiliary slag discharge components is located at the upper conveying start position of the annular flexible filter screen, and the other set of auxiliary slag discharge components is located at the lower conveying start position of the annular flexible filter screen. A water collection trough is also provided on the lower side of the bracket, and the collection trough is located inside the water collection trough.

[0008] The annular flexible filter screen is driven to rotate horizontally in a belt-like manner by a circulating transmission component, which can dynamically filter calcium hydroxide solution. The rotation of the annular flexible filter screen removes the filter residue and achieves double-layer filtration, improving the filtration effect. In addition, the auxiliary slag discharge component can automatically remove the filter residue on the annular flexible filter screen, eliminating the need for manual cleaning and making it more convenient to use.

[0009] Furthermore, the circulating transmission assembly includes a drive motor and two sets of transmission components, which are located on both sides of the width direction of the annular flexible filter screen. The transmission component includes a transmission belt and two transmission pulleys. The two transmission pulleys are located on both sides of the length direction of the annular flexible filter screen and are rotatably mounted on the inner side of the bracket. The transmission belt is connected between the two transmission pulleys, and the two transmission pulleys located in the width direction of the annular flexible filter screen are coaxially fixed by a transmission shaft. The annular flexible filter screen is horizontally fixedly connected between the two transmission belts. A drive motor is mounted on the side of the bracket, and the output end of the drive motor is coaxially fixed with one of the transmission pulleys.

[0010] Furthermore, the auxiliary slag discharge assembly includes a backflushing pipe and multiple flushing nozzles. The backflushing pipe is located on the upper side of the annular flexible filter screen, and a mounting bracket for connecting the backflushing pipe is fixed on the inner side of the bracket. Multiple flushing nozzles are fixedly connected to the outer surface of the bottom end of the backflushing pipe at equal intervals along the length of the backflushing pipe.

[0011] Furthermore, the auxiliary slag discharge assembly located at the upper conveying start position of the annular flexible filter screen also includes a guide trough, which is fixed on the mounting frame and is inclined.

[0012] Furthermore, a discharge port is provided at the bottom of the dissolving tank, and a sealing valve is installed at the discharge port. A dispersion box connected to the discharge port is fixed at the bottom of the dissolving tank.

[0013] Furthermore, the annular flexible filter screen is provided with conical filter holes, and the diameter of the conical filter holes on the upper layer of the annular flexible filter screen decreases from top to bottom.

[0014] Furthermore, a second drive motor is installed at the top of the dissolving tank. The output end of the second drive motor passes through the dissolving tank and is equipped with a stirring structure. The upper end of the dissolving tank is provided with a feed inlet and a water inlet.

[0015] 3. Beneficial Effects Compared with existing technologies, the advantages of this utility model are: (1) This solution uses a drive motor, a transmission belt and a transmission pulley to drive the annular flexible filter screen to rotate horizontally in a transmission belt manner, which can dynamically filter the calcium hydroxide solution. The rotation of the annular flexible filter screen carries away the filter residue and achieves double-layer filtration, thereby improving the filtration effect.

[0016] (2) This solution automatically removes the filter residue on the annular flexible filter screen by using a backwash pipe in conjunction with a flushing nozzle, eliminating the need for manual cleaning and making it more convenient to use.

[0017] (3) This solution sets conical filter holes on the annular flexible filter screen, and the diameter of the conical filter holes on the upper layer of the annular flexible filter screen decreases from top to bottom. During filtration, the diameter of the conical filter holes in the lower layer is smaller than that in the upper layer, which can filter out filter residue with smaller particle size and achieve better filtration effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a three-dimensional structural diagram of the annular flexible filter screen of this utility model; Figure 5 This is a three-dimensional structural diagram of the auxiliary slag discharge component of this utility model.

[0019] Explanation of the labels in the diagram: 1. Support frame; 2. Dissolving tank; 3. Collection tank; 4. Annular flexible filter screen; 401. Conical filter holes; 5. Drive motor one; 6. Transmission pulley; 7. Transmission belt; 8. Mounting bracket; 9. Backflush pipe; 91. Flushing nozzle; 10. Guide trough; 11. Water collection tank; 12. Drive motor two; 13. Feed inlet; 14. Water inlet; 15. Drive shaft; 16. Dispersion box. Detailed Implementation

[0020] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0021] Example 1: Please see Figures 1-5A filtration device for producing liquid calcium hydroxide includes a support 1, a dissolving tank 2 disposed on the upper side of the support 1, a collecting tank 3 disposed on the lower side of the support 1, and an annular flexible filter screen 4 located between the dissolving tank 2 and the collecting tank 3. The dissolving tank 2 and the collecting tank 3 are respectively located on the upper and lower sides of the middle part of the annular flexible filter screen 4. The annular flexible filter screen 4 is made of a material that is not easily corroded by calcium hydroxide, such as rubber.

[0022] The upper end of the dissolving tank 2 is provided with a feed inlet 13 and a water inlet 14. In order to accelerate the dissolution rate of solid calcium hydroxide, a second drive motor 12 is installed at the top of the dissolving tank 2. The output end of the second drive motor 12 passes through the dissolving tank 2 and is equipped with a stirring structure (not shown in the figure). The second drive motor 12 drives the stirring structure to rotate to stir the calcium hydroxide.

[0023] The annular flexible filter 4 is connected to the support 1 by a circulating transmission assembly. The circulating transmission assembly causes the annular flexible filter 4 to rotate horizontally in a belt-like manner. Specifically, the circulating transmission assembly includes a drive motor 5 and two sets of transmission components. The two sets of transmission components are located on both sides of the width direction of the annular flexible filter 4. The transmission components include a transmission belt 7 and two transmission pulleys 6. The two transmission pulleys 6 are located on both sides of the length direction of the annular flexible filter 4 and are rotatably installed on the inner side of the support 1. The transmission belt 7 is connected between the two transmission pulleys 6, and the two transmission pulleys 6 located in the width direction of the annular flexible filter 4 are coaxially fixed between them by a transmission shaft 15. The annular flexible filter 4 is horizontally fixedly connected between the two transmission belts 7. The drive motor 5 is installed on the side end of the support 1, and the output end of the drive motor 5 is coaxially fixed with one of the transmission pulleys 6.

[0024] The drive motor 5, drive belt 7, and drive pulley 6 work together to drive the annular flexible filter screen 4 to rotate horizontally in a belt-driven manner (e.g., ...). Figure 2 The dashed arrow in the image indicates the direction of transmission of the annular flexible filter screen 4. It can dynamically filter calcium hydroxide solution by using the rotation of the annular flexible filter screen 4 to remove filter residue and achieve double-layer filtration, thereby improving the filtration effect.

[0025] It should be noted that the collection tank 3 in this solution has a relatively large opening area (the figure is for illustrative purposes only; the specific length of the collection tank 3 along the moving direction of the annular flexible filter screen 4 is designed to ensure that the calcium hydroxide solution can be basically filtered above the collection tank 3). The speed at which the circulating transmission component drives the annular flexible filter screen 4 to rotate is relatively slow. Specifically, it is ensured that the calcium hydroxide solution falling onto the surface of the annular flexible filter screen 4 can be basically filtered above the collection tank 3, that is, the part of the annular flexible filter screen 4 that moves outside the collection tank 3 will not carry too much calcium hydroxide solution, thereby reducing the loss of calcium hydroxide solution.

[0026] The bracket 1 is also equipped with two sets of auxiliary slag discharge components. One set of auxiliary slag discharge components is located at the upper conveying start position of the annular flexible filter screen 4, and the other set of auxiliary slag discharge components is located at the lower conveying start position of the annular flexible filter screen 4. The bracket 1 is also equipped with a water collection tank 11 on its lower side, and the collection tank 3 is located inside the water collection tank 11.

[0027] Specifically, the auxiliary slag discharge assembly includes a backflushing pipe 9 and multiple flushing nozzles 91. The backflushing pipe 9 is located on the upper side of the annular flexible filter screen 4. An installation bracket 8 for connecting the backflushing pipe 9 is fixed on the inner side of the bracket 1. Multiple flushing nozzles 91 are fixedly connected to the outer surface of the bottom end of the backflushing pipe 9 at equal intervals along the length of the backflushing pipe 9. The backflushing pipe 9 is connected to a water pump through a hose. The water pump draws external water to the backflushing pipe 9 and sprays it downward through the flushing nozzles 91 to backflush the annular flexible filter screen 4 and wash off the filter residue attached to the bottom surface of the annular flexible filter screen 4.

[0028] The backwash pipe 9, in conjunction with the flushing nozzle 91, automatically removes the filter residue from the annular flexible filter screen 4, eliminating the need for manual cleaning and making it more convenient to use.

[0029] It should be noted that the horizontal length of the annular flexible filter screen 4 in this solution is relatively long, so that when the annular flexible filter screen 4 moves to the collection tank 3, it will not carry too much rinsing wastewater, thereby reducing the mixing of rinsing wastewater.

[0030] In addition, the auxiliary slag discharge assembly located at the upper conveying start position of the annular flexible filter screen 4 also includes a guide trough 10. The guide trough 10 is fixed on the mounting frame 8 and is inclined. The wastewater from rinsing the filter slag carries the washed-down filter slag through the guide trough 10 into the water collection tank 11. Of course, the wastewater in the water collection tank 11 can be filtered and recycled.

[0031] The dissolving tank 2 has a discharge port at its bottom, and a sealing valve is installed at the discharge port. Preferably, it is a conventional corrosion-resistant solenoid valve, which is easy to control. A dispersion box 16 connected to the discharge port is fixed at the bottom of the dissolving tank 2. The bottom of the dispersion box 16 is covered with dispersion holes, which can disperse the calcium hydroxide solution onto the upper surface of the annular flexible filter screen 4, resulting in better filtration.

[0032] Example 2: like Figure 2 and Figure 3 As shown, the annular flexible filter screen 4 is provided with conical filter holes 401, and the diameter of the conical filter holes 401 located on the upper layer of the annular flexible filter screen 4 decreases from top to bottom.

[0033] When the calcium hydroxide solution falls onto the upper layer of the annular flexible filter screen 4 for filtration, the conical filter holes 401, whose pore size decreases from top to bottom, are slightly enlarged by the gravity of the calcium hydroxide solution. The calcium hydroxide solution achieves the first layer of filtration through these conical filter holes 401. When the calcium hydroxide solution after the first layer of filtration falls onto the lower layer of the annular flexible filter screen 4 for filtration, since the pore size of the lower layer's conical filter holes 401 increases from top to bottom, its pore size is less affected by the gravity of the calcium hydroxide solution. Therefore, the lower layer's conical filter holes 401 have a smaller pore size than the upper layer's conical filter holes 401, which can filter out filter residue with a smaller particle size, resulting in a better filtration effect.

[0034] It should be further noted that the specific models and specifications of drive motor 5, drive motor 12, water pump and solenoid valve in this solution need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail. The power supply and principle of drive motor 5, drive motor 12, water pump and solenoid valve are clear to those skilled in the art, and will not be described in detail here.

[0035] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A filtration device for producing liquid calcium hydroxide, comprising a support (1), a dissolving tank (2) disposed on the upper side of the support (1), a collecting tank (3) disposed on the lower side of the support (1), and an annular flexible filter screen (4) located between the dissolving tank (2) and the collecting tank (3), characterized in that: A circulating transmission assembly is connected between the annular flexible filter screen (4) and the support (1), and the circulating transmission assembly causes the annular flexible filter screen (4) to rotate horizontally in a transmission belt manner. The dissolving tank (2) and the collecting tank (3) are located on the upper and lower sides of the middle part of the annular flexible filter screen (4), respectively. Two sets of auxiliary slag discharge components are also installed on the inner side of the support (1). One set of the auxiliary slag discharge components is located at the upper conveying start position of the annular flexible filter screen (4), and the other set of the auxiliary slag discharge components is located at the lower conveying start position of the annular flexible filter screen (4). A water collection trough (11) is also provided on the lower side of the bracket (1), and the collection trough (3) is located inside the water collection trough (11).

2. The filtering device for producing liquid calcium hydroxide according to claim 1, characterized in that: The circulating transmission assembly includes a drive motor (5) and two sets of transmission components, which are located on both sides of the width direction of the annular flexible filter screen (4); The transmission component includes a transmission belt (7) and two transmission pulleys (6). The two transmission pulleys (6) are located on both sides of the length direction of the annular flexible filter (4) and are rotatably installed on the inner side of the bracket (1). The transmission belt (7) is connected between the two transmission pulleys (6), and the two transmission pulleys (6) located in the width direction of the annular flexible filter (4) are coaxially fixed between them by a transmission shaft (15). The annular flexible filter (4) is horizontally fixed between the two transmission belts (7). The drive motor (5) is mounted on the side of the bracket (1), and the output end of the drive motor (5) is coaxially fixed with one of the transmission pulleys (6).

3. The filtering device for producing liquid calcium hydroxide according to claim 2, characterized in that: The auxiliary slag discharge assembly includes a backflushing pipe (9) and multiple flushing nozzles (91). The backflushing pipe (9) is located on the upper side of the annular flexible filter screen (4). The inner side of the bracket (1) is fixed with a mounting bracket (8) for connecting the backflushing pipe (9). The multiple flushing nozzles (91) are equidistantly fixed and connected to the outer surface of the bottom end of the backflushing pipe (9) along the length direction of the backflushing pipe (9).

4. The filtering device for producing liquid calcium hydroxide according to claim 3, characterized in that: The auxiliary slag discharge assembly located at the upper conveying start position of the annular flexible filter screen (4) also includes a guide trough (10), which is fixed on the mounting frame (8) and is inclined.

5. The filtering device for producing liquid calcium hydroxide according to claim 1, characterized in that: The bottom of the dissolving tank (2) is provided with a discharge port, and a sealing valve is installed at the discharge port. A dispersion box (16) connected to the discharge port is fixed at the bottom of the dissolving tank (2).

6. The filtering device for producing liquid calcium hydroxide according to claim 1, characterized in that: The annular flexible filter screen (4) is provided with conical filter holes (401), and the diameter of the conical filter holes (401) located on the upper layer of the annular flexible filter screen (4) decreases from top to bottom.

7. The filtering device for producing liquid calcium hydroxide according to claim 1, characterized in that: The top of the dissolving tank (2) is equipped with a second drive motor (12), the output end of the second drive motor (12) passes through the dissolving tank (2) and is equipped with a stirring structure. The upper end of the dissolving tank (2) is provided with a feed inlet (13) and a water inlet (14).

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