Continuous filtering and purifying equipment in calcium hydroxide production process

Abstract

The utility model discloses continuous filtering and purifying equipment in a calcium hydroxide production process, which comprises a reaction kettle, the top of one side of the reaction kettle is communicated with a filtering tank, an inner cavity of the filtering tank is fixedly connected with two groups of filtering plates which are arranged from top to bottom, and the two groups of filtering plates are arranged in a conical shape; the surface of the filtering tank is provided with a removing assembly used for removing impurities attached to the surface of the filtering plate, the top of the filtering tank is communicated with a feeding pipe, the conical filtering plate has a larger surface area than a plane filtering plate, the interior of the filtering tank is easier to clean through the slag outlet, and the filtering tank is more convenient to clean. And the interior of the filtering tank can be checked and cleaned through the slag outlet, so that impurities remained at the edge of the filtering plate or on the wall surface of the filtering tank can be conveniently cleaned.

Description

Technical Field

[0001] This utility model belongs to the technical field of calcium hydroxide production equipment, specifically relating to a continuous filtration and purification device in the calcium hydroxide production process. Background Technology

[0002] Patent CN220070987U discloses a novel calcium hydroxide purification device. The outer reaction vessel is threadedly connected to a vessel lid at its top. A feed pipe is mounted on the upper surface of the lid, and a connecting sleeve is threaded onto the external surface of the feed pipe. A filter cylinder is connected to the upper end of the connecting sleeve. Inside the filter cylinder, a first filter screen and a second filter screen are arranged from top to bottom. A first rotating rod is threaded through the upper surfaces of both the first and second filter screens. A first mounting sleeve is fitted onto the outside of the first rotating rod, and a cleaning rod is connected to the outside of the first mounting sleeve. A cleaning brush is mounted on the lower surface of the cleaning rod. This device, through the arrangement of the first and second filter screens inside the filter cylinder, can perform double filtration of the purified calcium hydroxide solution entering the inner reaction vessel, preventing impurities in the calcium hydroxide solution from affecting the purification quality.

[0003] In use, the cleaning brush can brush the surfaces of the first and second filter screens to prevent clogging. However, the impurities filtered out by the first and second filter screens will be brushed to the edges of the filter screens, affecting the filtration speed of the solution. Utility Model Content

[0004] The purpose of this invention is to provide a continuous filtration and purification device for the calcium hydroxide production process, so as to solve the technical defects of current purification devices that affect filtration efficiency due to the accumulation of impurities at the edges.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A continuous filtration and purification device for calcium hydroxide production includes a reaction vessel, a filter tank connected to the top of one side of the reaction vessel, two sets of filter plates arranged from top to bottom in a conical shape fixedly connected to the inner cavity of the filter tank, a removal component for removing impurities adhering to the surface of the filter plates provided on the surface of the filter tank, a feed pipe connected to the top of the filter tank, a stirring component for accelerating the reaction rate of the calcium hydroxide solution provided in the inner cavity of the reaction vessel, and a discharge pipe connected to the bottom of one side of the reaction vessel, with a valve connected to the opening of the discharge pipe.

[0007] The cleaning components include slag outlets located on both sides of the filter tank and corresponding to each set of filter plates. The filter tank is equipped with a scraping component for scraping off impurities adhering to the surface of the filter plates, and the surface of the filter tank is equipped with a sealing component for sealing the slag outlets.

[0008] As a preferred embodiment of this utility model, the scraping assembly includes a first bearing respectively embedded in the top of two sets of filter plates. A connecting rod is fixedly inserted into the inner ring of the two sets of first bearings. One end of the connecting rod passes through the filter tank upward and is fixedly connected to a handwheel. A fixing ring is fixedly sleeved on the surface of the connecting rod and at the top position of each set of filter plates. A connecting plate is fixedly connected to both sides of the two sets of fixing rings. The two sets of connecting plates at the same height have their opposite ends bent downward. A scraper is connected to the downward bent end of the two sets of connecting plates at the same height near the inclined surface of the corresponding filter plate. The bottom of the two sets of scrapers at the same height respectively contacts the surface of the corresponding filter plate.

[0009] As a preferred embodiment of the present invention, the sealing assembly includes a sealing ring that is slidably sealed on the surface of the filter tank and located at the corresponding positions of the two sets of filter plates. Several sets of connecting strips are fixedly connected to the top of the lower sealing ring, and the top of the connecting strips is fixedly connected to the bottom surface of the upper sealing ring. A limiting ring is fixedly fitted on the surface of the filter tank and at the bottom position of the lower sealing ring.

[0010] As a further preferred embodiment of this utility model, both sides of the two sets of sealing rings are threaded with second bolts, and one end of the two sets of second bolts at the same height respectively threaded through the corresponding side surface of the sealing ring and abutting against the surface of the filter tank.

[0011] As a further preferred embodiment of this utility model, two sets of first bolts are threadedly connected to the surfaces of the two sets of connecting plates at the same height. The two sets of first bolts at the same position pass through the surfaces of the corresponding side connecting plates and are threadedly connected to the scraper surfaces of the corresponding sides.

[0012] As a preferred embodiment of this utility model, the stirring assembly includes a drive motor fixedly installed on the top of the reactor. The output shaft of the drive motor is connected to a transmission shaft via a coupling. A second bearing seat is fixedly connected to the middle of the bottom inner wall of the reactor. One end of the transmission shaft extends downward into the inner cavity of the reactor and is inserted into the inner cavity of the second bearing seat. Several sets of connecting rings are fixedly provided on the surface of the transmission shaft located in the inner cavity of the reactor. Stirring plates are fixedly connected to both sides of the connecting rings respectively.

[0013] Compared with existing technologies, the continuous filtration and purification equipment for calcium hydroxide production provided by this utility model has the following advantages:

[0014] 1. The filter plate in this device is conical, giving it a larger surface area than a flat filter plate. When solid impurities are intercepted on the surface of the filter plate, due to the conical slope, the impurities tend to move towards the edge of the filter plate under their own gravity and the scouring effect of the liquid flow, preventing excessive accumulation of impurities in the center or local area of ​​the filter plate. At the same time, the slag outlet makes it easier to clean the inside of the filter tank. The inside of the filter tank can be inspected and cleaned through the slag outlet, making it easy to remove impurities remaining on the edge of the filter plate or the wall of the filter tank.

[0015] 2. This equipment features a scraping assembly. Rotating the handwheel in the scraping assembly rotates the connecting rod, which in turn rotates the fixed ring. The connecting plates on both sides of the fixed ring and the connected scraper also rotate together. The rotation of the scraper removes impurities adhering to the surface of the filter plate. The scraped impurities are discharged from the filter tank through the slag outlet. This method can thoroughly clean impurities from the surface of the filter plate, ensuring the continuous and stable filtration performance of the filter plate. It reduces problems such as decreased filtration efficiency and increased filtration pressure caused by impurity accumulation, extends the service life of the filter plate, and reduces equipment maintenance costs.

[0016] 3. The first bolt threaded on the surface of the connecting plate at the same height in this equipment is used to connect the scraper, which makes the installation and disassembly of the scraper simple. When the scraper is worn or damaged due to long-term use, a new scraper can be quickly replaced by loosening the first bolt, without the need for large-scale disassembly and reassembly of the entire scraping assembly. This greatly shortens the equipment maintenance time and improves the maintainability and operational reliability of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the reaction vessel in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the filter tank in an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the filter tank in an embodiment of the present invention;

[0022] Figure 5This is a schematic diagram of the connecting rod in an embodiment of the present invention.

[0023] Figure label:

[0024] 100. Reactor; 102. Filter tank; 103. Feed pipe; 104. Valve; 105. Discharge pipe; 106. Slag outlet; 107. Filter plate; 108. Limiting ring;

[0025] 200. Handwheel; 201. Connecting plate; 202. Scraper; 203. First bolt; 204. Retaining ring; 205. Connecting rod; 206. First bearing;

[0026] 300. Sealing ring; 301. Connecting strip; 302. Second bolt;

[0027] 400. Drive motor; 401. Drive shaft; 402. Stirring plate; 403. Connecting ring; 404. Second bearing seat. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model.

[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0031] See appendix Figure 1-5As shown in the figure, a continuous filtration and purification device for calcium hydroxide production process according to an embodiment of the present invention includes a reaction vessel 100, a filter tank 102 connected to the top of one side of the reaction vessel 100, two sets of filter plates 107 arranged from top to bottom fixedly connected to the inner cavity of the filter tank 102, the two sets of filter plates 107 being conical in shape, a removal component for removing impurities attached to the surface of the filter plates 107 being provided on the surface of the filter tank 102, a feed pipe 103 connected to the top of the filter tank 102, a stirring component for accelerating the reaction rate of the calcium hydroxide solution being provided in the inner cavity of the reaction vessel 100, a discharge pipe 105 connected to the bottom of one side of the reaction vessel 100, and a valve 104 connected to the opening of the discharge pipe 105.

[0032] The cleaning assembly includes slag outlets 106 located on both sides of the filter tank 102 and corresponding to each set of filter plates 107. The filter tank 102 is equipped with a scraping assembly for scraping off impurities adhering to the surface of the filter plates 107, and the surface of the filter tank 102 is equipped with a sealing assembly for sealing the slag outlets 106. The filter plate 107 and the slag outlet 106 are designed with a conical shape, giving the filter plate 107 a larger surface area than a flat filter plate. When solid impurities are intercepted on the surface of the filter plate 107, the conical slope causes the impurities to tend to move towards the edge of the filter plate 107 under the influence of their own gravity and the scouring effect of the liquid flow, thus preventing excessive accumulation of impurities in the center or local areas of the filter plate 107. At the same time, the slag outlet 106 makes it easier to clean the inside of the filter tank 102. Operators can inspect and clean the inside of the filter tank 102 through the slag outlet 106, making it easier to remove impurities remaining on the edge of the filter plate 107 or the wall of the filter tank 102.

[0033] The scraping assembly includes first bearings 206 respectively embedded in the top of two sets of filter plates 107. Connecting rods 205 are fixedly inserted into the inner rings of the two sets of first bearings 206. One end of the connecting rod 205 passes through the filter tank 102 upward and is fixedly connected to a handwheel 200. A fixing ring 204 is fixedly sleeved on the surface of the connecting rod 205 and at the top position of each set of filter plates 107. Connecting plates 201 are fixedly connected to both sides of the two sets of fixing rings 204. The two sets of connecting plates 201 at the same height have their facing ends bent downward. The two sets of connecting plates 201 at the same height have their downward bent ends connected to scrapers 202 near the inclined surface of the corresponding filter plate 107. The bottoms of the two sets of scrapers 202 at the same height respectively contact the surface of the corresponding filter plate 107. By rotating the handwheel 200 in the scraping assembly, the handwheel 200 drives the connecting rod 205 to rotate, which in turn drives the fixing ring 204 to rotate. The connecting plates 201 on both sides of the fixing ring 204 and the connected scraper 202 also rotate together. The rotation of the scraper 202 scrapes off the impurities attached to the surface of the filter plate 107. The scraped impurities are discharged from the filter tank 102 through the slag outlet 106. This can thoroughly clean the impurities on the surface of the filter plate 107, ensuring the continuous and stable filtration performance of the filter plate 107, reducing problems such as decreased filtration efficiency and increased filtration pressure caused by impurity accumulation, extending the service life of the filter plate 107, and reducing equipment maintenance costs.

[0034] The sealing assembly includes a sealing ring 300 that is slidably sealed on the surface of the filter tank 102 and located at the corresponding positions of the two sets of filter plates 107. Several sets of connecting strips 301 are fixedly connected to the top of the lower sealing ring 300. The top of the connecting strips 301 is fixedly connected to the bottom surface of the upper sealing ring 300. A limiting ring 108 is fixedly fitted on the surface of the filter tank 102 and at the bottom position of the lower sealing ring 300. The two sides of the two sets of sealing rings 300 are threadedly connected with second bolts 302. One end of the two sets of second bolts 302 at the same height respectively threaded through the corresponding side surface of the sealing ring 300 and abuts against the surface of the filter tank 102. By using the sealing ring 300 and the second bolt 302, the opening and closing of the slag outlet 106 can be easily achieved. At the same time, tightening the second bolt 302 ensures that the sealing ring 300 is tightly pressed against the surface of the filter tank 102, which can effectively prevent the material inside the filter tank 102 from leaking from the slag outlet 106, ensuring the sealing and stability of the filtration process, and avoiding problems such as material leakage causing pollution to the production environment and material loss.

[0035] Two sets of first bolts 203 are threaded onto the surfaces of two sets of connecting plates 201 at the same height. The two sets of first bolts 203 at the same position pass through the surfaces of the corresponding side connecting plates 201 and are threaded onto the surfaces of the corresponding side scrapers 202. With the setting of the first bolts 203, the first bolts 203 threaded onto the surfaces of the connecting plates 201 at the same height are used to connect the scrapers 202, which makes the installation and disassembly of the scrapers 202 convenient. When the scrapers 202 are worn or damaged due to long-term use, new scrapers 202 can be quickly replaced by loosening the first bolts 203, without the need for large-scale disassembly and reassembly of the entire scraping assembly. This greatly shortens the equipment maintenance time and improves the maintainability and operational reliability of the equipment.

[0036] The stirring assembly includes a drive motor 400 fixedly installed on the top of the reactor 100. The output shaft of the drive motor 400 is connected to a transmission shaft 401 via a coupling. A second bearing seat 404 is fixedly connected to the middle of the bottom inner wall of the reactor 100. One end of the transmission shaft 401 extends downward into the inner cavity of the reactor 100 and is inserted into the inner cavity of the second bearing seat 404. Several sets of connecting rings 403 are fixedly provided on the surface of the transmission shaft 401 located in the inner cavity of the reactor 100. Stirring plates 402 are fixedly connected to both sides of the connecting rings 403 respectively. By setting up the stirring assembly, the drive motor 400 in the stirring assembly drives the transmission shaft 401, the connecting ring 403, and the stirring plate 402 to rotate, which can generate a strong stirring effect in the reaction vessel 100. For the reaction of calcium hydroxide solution, stirring can make the calcium hydroxide particles in the solution uniformly dispersed, increase the contact opportunities and contact area with other reactants, and promote the chemical reaction. At the same time, stirring can also make the temperature, concentration, and other distributions in the reaction system more uniform, avoid reaction abnormalities caused by local overheating or uneven concentration, and improve the conversion rate and product consistency of the reaction.

[0037] When the solution enters the filter tank 102, it first comes into contact with the upper conical filter plate 107. Solid impurities in the solution are intercepted on the surface of the filter plate 107. The liquid filtered by the first filter plate 107 then passes through the lower conical filter plate 107 for secondary filtration to further remove smaller impurities, thereby continuously and multiple times filtering the calcium hydroxide solution.

[0038] As the filtration process proceeds, a large amount of impurities will gradually adhere to the surface of the filter plate 107. When it is necessary to remove the impurities, loosen the second bolts 302 on both sides of the sealing ring 300, slide the sealing ring 300 upward to move the sealing ring 300 away from the slag outlet 106, open the slag outlet 106, and at the same time tighten the second bolts 302 to fix the sealing ring 300. Rotate the handwheel 200 in the scraping assembly. The handwheel 200 drives the connecting rod 205 to rotate, and the fixing ring 204 on the connecting rod 205 rotates accordingly. The connecting plates 201 on both sides of the fixing ring 204 and the connected scraper 202 will also rotate together. The rotation of the scraper 202 will scrape off the impurities adhering to the surface of the filter plate 107. The scraped impurities are discharged from the filter tank 102 through the slag outlet 106, completing the removal of impurities.

[0039] When scraper 202 is used for a long time and the contact surface between scraper 202 and filter plate 107 becomes worn, scraper 202 needs to be replaced. Simply remove the first bolt 203 in sequence to release the restriction on scraper 202, and then scraper 202 can be removed from the surface of connecting plate 201. Then take out a new scraper 202, place it on the surface of connecting plate 201 near filter plate 107, and use the first bolt 203 to penetrate the connecting plate 201 and thread it onto the surface of scraper 202, thereby completing the replacement of scraper 202.

[0040] Slide the sealing ring 300 back to its original position, tighten the second bolt 302, and reseal the slag outlet 106 so that the filter tank 102 can continue to work normally.

[0041] When the calcium hydroxide solution and other materials enter the reactor 100, the drive motor 400 in the stirring assembly is started. The output shaft of the drive motor 400 rotates, driving the transmission shaft 401 to rotate through the coupling. The transmission shaft 401 rotates stably under the support of the second bearing seat 404 at the bottom of the reactor 100. The stirring plates 402 fixed on both sides of the connecting ring 403 on the transmission shaft 401 also move in a circular motion with the transmission shaft 401. The stirring plates 402 continuously stir the solution, so that the solute and solvent in the calcium hydroxide solution are fully mixed, and at the same time, the contact area between the solute and other reactants is increased.

[0042] The above description illustrates the basic principles of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous filtration and purification device for calcium hydroxide production, comprising a reaction vessel (100), characterized in that: The top of one side of the reactor (100) is connected to a filter tank (102). The inner cavity of the filter tank (102) is fixedly connected to two sets of filter plates (107) arranged from top to bottom. The two sets of filter plates (107) are arranged in a conical shape. The surface of the filter tank (102) is provided with a removal component for removing impurities attached to the surface of the filter plates (107). The top of the filter tank (102) is connected to a feed pipe (103). The inner cavity of the reactor (100) is provided with a stirring component for accelerating the reaction rate of the calcium hydroxide solution. The bottom of one side of the reactor (100) is connected to a discharge pipe (105). The opening of the discharge pipe (105) is connected to a valve (104). The removal component includes a slag outlet (106) located on both sides of the filter tank (102) and corresponding to each set of filter plates (107). The filter tank (102) is provided with a scraping component for scraping off impurities attached to the surface of the filter plates (107). The surface of the filter tank (102) is provided with a sealing component for sealing the slag outlet (106). The scraping assembly includes a first bearing (206) embedded in the top of two sets of filter plates (107). A connecting rod (205) is fixedly inserted into the inner ring of the two sets of first bearings (206). One end of the connecting rod (205) passes through the filter tank (102) upward and is fixedly connected to a handwheel (200). A fixing ring (204) is fixedly sleeved on the surface of the connecting rod (205) and at the top position of each set of filter plates (107). A connecting plate (201) is fixedly connected to both sides of the two sets of fixing rings (204). The two sets of connecting plates (201) at the same height have their opposite ends bent downward. The two sets of connecting plates (201) at the same height have their downward bent ends connected to a scraper (202) near the inclined surface of the corresponding filter plate (107). The bottom of the two sets of scrapers (202) at the same height respectively contacts the surface of the corresponding filter plate (107). The sealing assembly includes a sealing ring (300) that is slidably sealed on the surface of the filter tank (102) and located at corresponding positions of the two sets of filter plates (107). A plurality of connecting strips (301) are fixedly connected to the top of the lower sealing ring (300). The top of the connecting strips (301) is fixedly connected to the bottom surface of the upper sealing ring (300). A limiting ring (108) is fixedly fitted on the surface of the filter tank (102) and at the bottom position of the lower sealing ring (300).

2. The continuous filtration and purification equipment in the calcium hydroxide production process according to claim 1, characterized in that: Both sides of the two sets of sealing rings (300) are threaded with second bolts (302). One end of the two sets of second bolts (302) at the same height respectively threaded through the corresponding side surface of the sealing ring (300) and abutting against the surface of the filter tank (102).

3. The continuous filtration and purification equipment in the calcium hydroxide production process according to claim 1, characterized in that: Two sets of first bolts (203) are threaded onto the surfaces of the two sets of connecting plates (201) at the same height. The two sets of first bolts (203) at the same position pass through the surface of the corresponding side connecting plate (201) and are threaded onto the surface of the corresponding side scraper (202).

4. A continuous filtration and purification device for calcium hydroxide production according to any one of claims 1-3, characterized in that: The stirring assembly includes a drive motor (400) fixedly installed on the top of the reactor (100). The output shaft of the drive motor (400) is connected to a transmission shaft (401) via a coupling. A second bearing seat (404) is fixedly connected to the middle of the bottom inner wall of the reactor (100). One end of the transmission shaft (401) extends downward to the inner cavity of the reactor (100) and is inserted into the inner cavity of the second bearing seat (404). Several sets of connecting rings (403) are fixedly provided on the surface of the transmission shaft (401) located in the inner cavity of the reactor (100). Stirring plates (402) are fixedly connected to both sides of the connecting rings (403).

Images