A new type of dicyandiamide solution filtering device

Abstract

The invention relates to a novel dicyandiamide solution filtering device and the technical field of dicyandiamide solution filtering, comprising a polymerization kettle for polymerizing cyanamide liquid, wherein the upper end outer side of the polymerization kettle is fixedly connected with a suction filter cylinder; a material storage component is provided on one side of the suction filter cylinder, and the material storage component is connected with the suction filter cylinder through a liquid extraction pipe; a filtering component is provided below the material storage component, and the filtering component is fitted and connected with a drainage component; a heater generates high temperature to heat the cyanamide liquid in a polymerization bin to 72 DEG C, and in the process of the cyanamide liquid being heated, a proper amount of quicklime is added into the polymerization bin through a feed inlet, and under the stirring of a connecting plate and bristles, the cyanamide liquid and the quicklime are fully fused and the pH value of the cyanamide liquid is adjusted to about 10-11, and then the polymerization reaction is completed and the cyanamide liquid is converted into a dicyandiamide liquid; at this time, a large amount of insoluble calcium salt impurities are doped in the dicyandiamide liquid, and the bristles continuously scratch the inner wall of the polymerization bin, so that the insoluble calcium salt impurities can be prevented from adhering to the inner wall of the polymerization bin.

Description

Technical Field

[0001] The invention relates to the technical field of dicyandiamide solution filtering, and in particular to a novel dicyandiamide solution filtering device. Background Art

[0002] Dicyandiamide is also known as dicyandiamide, abbreviated as DICY or DCD. It is a dimer of cyanamide and a cyano derivative of guanidine. Chemical formula C2H4N4. White crystalline powder. Soluble in water, alcohol, ethylene glycol and dimethylformamide, almost insoluble in ether and benzene. Non-flammable. Stable when dry; Preparation process: The calcium cyanamide suspension obtained by hydrolysis of calcium cyanamide is filtered under reduced pressure to remove the calcium hydroxide residue, and then carbon dioxide is introduced into the filtrate to precipitate calcium in the form of calcium carbonate to obtain amino cyanide liquid. It is polymerized under alkaline conditions, and then filtered, cooled, crystallized, separated, and dried to obtain dicyanamide.

[0003] During the preparation of dicyandiamide, there are five main sections: hydrolysis, decalcification, polymerization, crystallization, and drying and packaging. The polymerization section will produce a certain amount of insoluble calcium salt impurities, which will affect the purity of the dicyandiamide solution. Therefore, it is necessary to use a filtering device to filter the insoluble calcium salt impurities in the cyandiamide solution. The current main filtering method is to use negative pressure suction to suck the cyandiamide solution into a suction filter cartridge for filtration. The suction filter cartridge is composed of a variety of mixed filter materials such as filter cloth, old sacks, and filter paper. However, as the filtration time goes by, the impurities in the suction filter cartridge accumulate too much, which will reduce the filtration speed of the suction filter cartridge in the middle and late stages of each shift. In addition, considering cost control, the filter cloth used in the suction filter cartridge needs to be repeatedly washed and reused, and the wastewater generated by washing the filter cloth should also be returned to the production system for secondary use. Because the washing water contains a small amount of impurities such as calcium carbonate, it will cause calcium instability in the entire production system, and the fluctuation range of calcium content is large. The filtration control requirements required for high-quality dicyandiamide production cannot be met, and the filtration of the dicyandiamide solution needs to be stopped each time the filter cloth is washed, which reduces the efficiency of dicyandiamide solution filtration. Summary of the invention

[0004] Technical issues to be solved

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, meet the actual needs, and provide a novel dicyandiamide solution filtering device, which can clean the dicyandiamide solution filtering device without stopping the operation, and the generated wastewater and the dicyandiamide solution are separated and processed and filtered and reused by a plate and frame filter press, thereby removing impurities such as calcium carbonate in the water flow to solve the above technical problems.

[0006] Technical Solution

[0007] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0008] A novel dicyandiamide solution filtering device comprises a polymerization kettle for polymerizing cyanamide liquid, wherein a suction filter cartridge is fixedly connected to the outer side of the upper end of the polymerization kettle; a material storage component is arranged on one side of the suction filter cartridge, and the material storage component is connected with the suction filter cartridge through a liquid extraction pipe; a filter component is arranged below the material storage component, and the filter component is closely connected with a drainage component; a spray pipe is arranged above the drainage component, and a plurality of spray nozzles are arranged at both ends of the spray pipe;

[0009] The filtering assembly comprises a first filter plate, a second filter plate is fixedly connected to one side of the first filter plate, the second filter plate and the first filter plate are arranged in a straight line, and a plurality of filter holes are evenly arranged on the second filter plate and the first filter plate; two handles are symmetrically fixedly connected to one side of the first filter plate away from the second filter plate; the drainage assembly comprises a storage bin, a first collecting bin and a second collecting bin are fixedly connected to the two sides of the storage bin, and the bottoms of the first collecting bin and the second collecting bin are fixedly connected to a drainage pipe, and one end of the drainage pipe away from the first collecting bin and the second collecting bin is fixedly connected to a plate and frame filter press; a transfer pipe is fixedly connected to one side of the storage bin close to the polymerization kettle; a plurality of spray nozzles of the spray pipe are respectively located above the first collecting bin and the second collecting bin;

[0010] The material storage assembly includes a flexible folding bin, which corresponds to the position of the material storage bin, and the first filter plate and the second filter plate are located between the flexible folding bin and the material storage bin; the top of the flexible folding bin is fixedly connected to the top plate, and the four corners of the top plate are slidably connected to four sliding rods respectively.

[0011] As a further technical solution of the present invention, springs are sleeved on the outer sides of the upper ends of the four sliding rods; nuts are fixedly connected to the tops of the four sliding rods, the tops of the four springs are respectively fixedly connected to the four nuts, and the bottoms of the four springs are respectively fixedly connected to the four corners of the top of the top plate; the bottoms of the four sliding rods and the bottom of the flexible folding bin are fixedly connected to the top of the bracket; the middle of the top plate is fixedly connected to the liquid extraction tube, and the liquid extraction tube extends through the top plate to the inside of the flexible folding bin.

[0012] As a further technical solution of the present invention, both sides of the first collecting bin, the second collecting bin and the storage bin are fixedly connected to the bracket; the first filter plate and the second filter plate are both fitted with the first collecting bin, the second collecting bin and the storage bin; the first collecting bin, the second collecting bin and the storage bin are all funnel-shaped, and the sizes of the first filter plate and the second filter plate are the same as the upper end size of the storage bin, and the size of the feed end of the flexible folding bin is the same as the size of the first filter plate and the second filter plate.

[0013] As a further technical solution of the present invention, the suction filter cylinder includes an outer cylinder, the top of which is fixedly connected to the top cover, and a circular hole for a liquid extraction pipe to pass through is provided in the middle of the top cover; a discharge pipe for transporting pure dicyandiamide liquid is fixedly connected to the bottom of the outer cylinder; an inner cylinder is provided inside the upper end of the outer cylinder, and the inner cylinder and the outer cylinder are arranged in concentric circles, and a plurality of filter holes are evenly arranged on the inner cylinder; a liquid inlet is provided in the middle of the top of the inner cylinder, and the liquid inlet is fixedly connected to one end of the liquid extraction pipe away from the flexible folding bin; a reflux pipe is provided at the bottom of the inner cylinder, and the reflux pipe extends to the outside of the outer cylinder, the outer cylinder is provided with a sealing hole for the reflux pipe to pass through, and a connecting frame is fixedly connected to the outside of the outer cylinder.

[0014] As a further technical solution of the present invention, the polymerization kettle includes a tank body, a connecting frame fixedly connected to the outer side of the tank body; a sealing cover fixedly connected to the top of the tank body, a feed port is provided on the sealing cover and the feed port is connected to the inside of the tank body; a polymerization bin is provided at the lower end of the interior of the tank body, and the outer diameter of the polymerization bin is smaller than the inner diameter of the tank body; baffles are fixedly connected to both ends of the polymerization bin, a through groove with the same inner diameter as the polymerization bin is provided in the middle of the two baffles, and the outer sides of the two baffles are fitted with the inner wall of the tank body; a heater is sleeved on the outer side of the polymerization bin, and the heater is located in the space between the two baffles; a handle is fixedly connected to one side of the top of the baffle located above the polymerization bin; a discharge port is provided in the middle of the bottom of the tank body; an inspection port is provided at the lower end of the tank body, and a plurality of support columns are evenly and fixedly connected to the outer side of the lower end of the inspection port.

[0015] As a further technical solution of the present invention, a transmission roller is provided in the middle of the polymerization bin, and the bottom of the transmission roller is rotatably connected to the bottom of the polymerization bin; the top of the transmission roller is fixedly connected to the output end of the reducer, and a circular hole for the transmission roller to pass through is provided in the middle of the sealing cover; the bottom of the reducer is fixedly connected to the connecting seat, and the bottom of the connecting seat is fixedly connected to the top of the sealing cover; the input end of the reducer is fixedly connected to the output shaft of the motor; a plurality of connecting rods are fixedly connected to the lower end of the transmission roller, and the ends of the plurality of connecting rods away from the transmission roller are fixedly connected to the connecting plate; bristles are provided on the side of the connecting plate away from the connecting rod, and the plurality of connecting rods, the connecting plate and the bristles are all located on the inner side of the polymerization bin.

[0016] As a further technical solution of the present invention, the transfer pipe is fixedly connected to the discharge port, and a solenoid valve and water pump 2 are installed in the middle section of the transfer pipe; water pump 1 is installed in the middle section of the liquid extraction pipe; water pump 1 is fixedly connected to the support seat, and the support seat and the connecting frame are both fixedly connected to the outer wall of the tank body; and a controller is fixedly connected to the outer wall of the tank body.

[0017] As a further technical solution of the present invention, the bottoms of the plurality of support columns are fixedly connected to the placement plate, and the bottoms of the second water pump and the bracket are fixedly connected to the placement plate.

[0018] Beneficial effects:

[0019] A. In the present invention, cyanamide liquid is pumped into the polymerization bin through the feed port, and the cyanamide liquid entering the polymerization bin flows into the polymerization bin through the through groove in the middle of the baffle plate above the polymerization bin, and the two baffle plates play a role in sealing the space where the heater is located, preventing the cyanamide liquid from entering the space where the heater is located, ensuring that the heater will not be affected by the cyanamide liquid and can heat the polymerization bin normally; after the cyanamide liquid enters the polymerization bin, the motor cooperates with the reducer to control the rotation of the transmission roller, and the transmission roller synchronously drives the connection plate and the bristles to rotate through a plurality of connecting rods to rotate the cyanamide liquid. The amine liquid is stirred; the heater generates high temperature to heat the cyanamide liquid in the polymerization bin to 72°C. During the heating of the cyanamide liquid, an appropriate amount of quicklime is added to the polymerization bin through the feed port. Under the stirring of the connecting plate and the bristles, the cyanamide liquid and the quicklime are fully fused and the pH value of the cyanamide liquid is adjusted to about 10-11. Then, the polymerization reaction is completed and the cyanamide liquid becomes a dicyandiamide liquid. At this time, a large amount of insoluble calcium salt impurities are doped in the dicyandiamide liquid, and the bristles continuously scrape the inner wall of the polymerization bin to prevent the insoluble calcium salt impurities from adhering to the inner wall of the polymerization bin;

[0020] B. In the present invention, after obtaining the dicyandiamide liquid doped with insoluble calcium salt impurities, the solenoid valve is opened, and the water pump 2 is operated at the same time, the dicyandiamide liquid in the polymerization bin is transported into the transport pipe, and then the dicyandiamide liquid in the transport pipe enters the storage bin, as the dicyandiamide liquid level in the storage bin gradually rises until it passes through the second filter plate and enters the flexible folding bin, the second filter plate can perform preliminary filtration on the dicyandiamide liquid, filter the insoluble calcium salt impurities with a larger volume and make the insoluble calcium salt impurities adhere to the second filter plate, after a certain period of time, the insoluble calcium salt impurities adhered on the second filter plate accumulate too much, and the filtration efficiency of the second filter plate is reduced at this time, the staff can push the filter assembly to move horizontally as a whole through two handles, so that the second filter plate moves to the top of the second collection bin, and at the same time the first filter plate moves to the storage bin and the first filter plate. The filtration work continues between the flexible folding bins; the spray pipe is connected to the water source filtered by the plate and frame filter press, and the water in the spray pipe is sprayed to the second filter plate through multiple spray nozzles on the spray pipe, so as to wash away the insoluble calcium salt impurities adhering to the second filter plate, and the wastewater containing the insoluble calcium salt impurities falls into the second collecting bin and flows into the plate and frame filter press through the drainage pipe for filtration; when the insoluble calcium salt impurities adhering to the first filter plate accumulate too much, the staff will reset the filter assembly as a whole, move the first filter plate to the top of the first collecting bin and let the spray nozzle spray and wash the first filter plate, so as to clean the filter plate while ensuring the uninterrupted filtration work, thereby increasing the efficiency of the filtration work; and the wastewater containing the insoluble calcium salt impurities can be recycled under the filtration of the plate and frame filter press;

[0021] C. In the present invention, the dicyandiamide liquid preliminarily filtered by the first filter plate or the second filter plate enters the flexible folding bin and is temporarily stored in the flexible folding bin; the flexible folding bin has good ductility. As the amount of dicyandiamide liquid in the flexible folding bin increases, the dicyandiamide liquid can push the top plate to allow the flexible folding bin to continuously extend to increase the storage space of the flexible folding bin itself. When the amount of dicyandiamide liquid in the flexible folding bin is small, multiple springs drive the top plate to descend and reset to reduce the storage space of the flexible folding bin, so that the liquid extraction pipe on the top plate can always contact the liquid surface of the dicyandiamide liquid in the flexible folding bin, ensuring that the liquid extraction pipe can always absorb the dicyandiamide liquid in the flexible folding bin;

[0022] D. In the present invention, after the water pump is turned on, the water pump can suck the dicyandiamide liquid in the flexible folding bin into the inner cylinder through the liquid suction pipe; the multiple filter holes on the inner cylinder can perform secondary filtration on the dicyandiamide liquid, so that the small volume of insoluble calcium salt impurities in the dicyandiamide liquid remain in the inner cylinder; the dicyandiamide liquid moved to the outside of the inner cylinder is the pure dicyandiamide liquid that has been filtered twice, and the pure dicyandiamide liquid finally enters the dicyandiamide liquid storage bin through the discharge pipe; the dicyandiamide liquid doped with the small volume of insoluble calcium salt impurities in the inner cylinder re-enters the polymerization bin through the reflux pipe, and performs another cycle filtration, thereby ensuring the filtering effect of the dicyandiamide liquid and increasing the purity of the dicyandiamide liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 The main view of

[0025] Figure 3 For the present invention Figure 1 Side view of

[0026] Figure 4 For the present invention Figure 1 Another perspective of the picture;

[0027] Figure 5 For the present invention Figure 2 AA section view;

[0028] Figure 6 For the present invention Figure 2 BB cross-sectional view;

[0029] Figure 7 For the present invention Figure 3 AA section view;

[0030] Figure 8 For the present invention Figure 1 A partial structural diagram of

[0031] Fig. 9 It is a schematic diagram of the planar structure of the suction filter cartridge in the present invention;

[0032] Fig.10 For the present invention Fig. 9 AA section view;

[0033] Fig.11 For the present invention Figure 4 A partial structural diagram of

[0034] Fig.12 For the present invention Fig.11 Schematic diagram of the internal structure;

[0035] Fig.13 For the present invention Figure 8 A partial structural diagram of

[0036] Fig.14 For the present invention Figure 6 A partial enlarged view of .

[0037] In the figure: 1-polymerization kettle, 2-filter cartridge, 3-electromagnetic valve, 4-water pump 1, 5-stock storage assembly, 6-filter assembly, 7-drainage assembly, 8-spray pipe, 9-bracket, 10-controller, 11-water pump 2, 12-placement plate, 13-liquid extraction pipe;

[0038] 101-tank body, 102-polymerization chamber, 103-heater, 104-connecting plate, 105-brush, 106-connecting rod, 107-transmission roller, 108-connecting seat, 109-reducer, 110-motor, 111-feeding port, 112-inspection port, 113-discharging port, 114-support column, 115-sealing cover, 116-baffle, 117-handle, 201-outer cylinder, 202-discharging pipe , 203-top cover, 204-liquid inlet, 205-inner cylinder, 206-reflux pipe, 207-connecting frame, 501-flexible folding bin, 502-top plate, 503-slide rod, 504-spring, 505-nut, 601-first filter plate, 602-second filter plate, 603-handle, 701-first collecting bin, 702-second collecting bin, 703-storage bin, 704-drainage tube, 705-transport tube. DETAILED DESCRIPTION

[0039] See also Figure 1-14 A novel dicyandiamide solution filtering device comprises a polymerization kettle 1 for polymerizing monocyanamide liquid, wherein a suction filter cartridge 2 is fixedly connected to the outer side of the upper end of the polymerization kettle 1; a material storage component 5 is arranged on one side of the suction filter cartridge 2, and the material storage component 5 is connected with the suction filter cartridge 2 through a liquid extraction pipe 13; a filter component 6 is arranged below the material storage component 5, and the filter component 6 is closely connected with a drainage component 7; a spray pipe 8 is arranged above the drainage component 7, and a plurality of spray nozzles are arranged at both ends of the spray pipe 8;

[0040] The filtering assembly 6 comprises a first filter plate 601, a second filter plate 602 is fixedly connected to one side of the first filter plate 601, the second filter plate 602 and the first filter plate 601 are arranged in a straight line, and a plurality of filter holes are evenly arranged on the second filter plate 602 and the first filter plate 601; two handles 603 are symmetrically fixedly connected to one side of the first filter plate 601 away from the second filter plate 602; the drainage assembly 7 comprises a storage bin 703, a first collecting bin 701 and a second collecting bin 702 are fixedly connected to the two sides of the storage bin 703, and the bottoms of the first collecting bin 701 and the second collecting bin 702 are fixedly connected to a drainage pipe 704, and one end of the drainage pipe 704 away from the first collecting bin 701 and the second collecting bin 702 is fixedly connected to the plate and frame filter press; a transfer pipe 705 is fixedly connected to the side of the storage bin 703 close to the polymerization kettle 1; a plurality of spray nozzles of the spray pipe 8 are respectively located above the first collecting bin 701 and the second collecting bin 702;

[0041] The material storage assembly 5 includes a flexible folding bin 501, which corresponds to the position of the material storage bin 703, and the first filter plate 601 and the second filter plate 602 are located between the flexible folding bin 501 and the material storage bin 703; the top of the flexible folding bin 501 is fixedly connected to the top plate 502, and the four corners of the top plate 502 are slidably connected to four sliding rods 503 respectively;

[0042] By adopting the above technical solution, the cyanamide liquid is pumped into the polymerization chamber 102 through the feed port 111, and the cyanamide liquid entering the polymerization chamber 102 flows into the polymerization chamber 102 through the through groove in the middle of the baffle 116 above the polymerization chamber 102. The two baffles 116 play a role in sealing the space where the heater 103 is located, preventing the cyanamide liquid from entering the space where the heater 103 is located, ensuring that the heater 103 will not be affected by the cyanamide liquid and can heat the polymerization chamber 102 normally; after the cyanamide liquid enters the polymerization chamber 102, the motor 110 cooperates with the reducer 109 to control the rotation of the transmission roller 107, and the transmission roller 107 is synchronously driven by a plurality of connecting rods 106 The connecting plate 104 and the brush 105 rotate to stir the cyanamide liquid; the heater 103 generates high temperature to heat the cyanamide liquid in the polymerization chamber 102 to 72°C. During the heating of the cyanamide liquid, an appropriate amount of quicklime is added to the polymerization chamber 102 through the feed port 111. Under the stirring of the connecting plate 104 and the brush 105, the cyanamide liquid and the quicklime are fully fused and the pH value of the cyanamide liquid is adjusted to about 10-11. Then, the polymerization reaction is completed and the cyanamide liquid becomes a dicyandiamide liquid; at this time, a large amount of insoluble calcium salt impurities are doped in the dicyandiamide liquid, and the brush 105 continuously scratches the inner wall of the polymerization chamber 102, which can prevent the insoluble calcium salt impurities from adhering to the inner wall of the polymerization chamber 102.

[0043] Please refer to 1-14. In this embodiment, the outer sides of the upper ends of the four sliding rods 503 are sleeved with springs 504; the tops of the four sliding rods 503 are fixedly connected with nuts 505, the tops of the four springs 504 are respectively fixedly connected with the four nuts 505, and the bottoms of the four springs 504 are respectively fixedly connected with the top four corners of the top plate 502; the bottoms of the four sliding rods 503 and the bottom of the flexible folding bin 501 are fixedly connected with the top of the bracket 9; the middle of the top plate 502 is fixedly connected with the liquid extraction tube 13, and the liquid extraction tube 13 extends through the top plate 502 to the inside of the flexible folding bin 501;

[0044] Both sides of the first collecting bin 701, the second collecting bin 702 and the storage bin 703 are fixedly connected to the bracket 9; the first filter plate 601 and the second filter plate 602 are fitted with the first collecting bin 701, the second collecting bin 702 and the storage bin 703; the first collecting bin 701, the second collecting bin 702 and the storage bin 703 are all funnel-shaped, and the sizes of the first filter plate 601 and the second filter plate 602 are the same as the upper end size of the storage bin 703, and the size of the feeding end of the flexible folding bin 501 is the same as the size of the first filter plate 601 and the second filter plate 602;

[0045] The suction filter cylinder 2 comprises an outer cylinder 201, the top of which is fixedly connected to a top cover 203, and a circular hole is provided in the middle of the top cover 203 for the passage of a liquid extraction tube 13; a discharge tube 202 for transporting pure dicyandiamide liquid is fixedly connected to the bottom of the outer cylinder 201; an inner cylinder 205 is provided inside the upper end of the outer cylinder 201, and the inner cylinder 205 and the outer cylinder 201 are arranged in concentric circles, and a plurality of filter holes are evenly arranged on the inner cylinder 205; a liquid inlet 204 is provided in the middle of the top of the inner cylinder 205, and the liquid inlet 204 is fixedly connected to one end of the liquid extraction tube 13 away from the flexible folding bin 501; a reflux pipe 206 is provided at the bottom of the inner cylinder 205, and the reflux pipe 206 extends to the outside of the outer cylinder 201, and the outer cylinder 201 is provided with a sealing hole for the reflux pipe 206 to pass through, and a connecting frame 207 is fixedly connected to the outside of the outer cylinder 201;

[0046] By adopting the above technical scheme, after obtaining the dicyandiamide liquid doped with insoluble calcium salt impurities, the solenoid valve 3 is opened, and the water pump 11 is operated at the same time, the dicyandiamide liquid in the polymerization bin 102 is transported into the transport pipe 705, and then the dicyandiamide liquid in the transport pipe 705 enters the storage bin 703, as the dicyandiamide liquid level in the storage bin 703 gradually rises until it passes through the second filter plate 602 and enters the flexible folding bin 501, the second filter plate 602 can perform preliminary filtration on the dicyandiamide liquid, filter out the larger insoluble calcium salt impurities and make the insoluble calcium salt impurities adhere to the second filter plate 602, after a certain period of time, the insoluble calcium salt impurities adhered to the second filter plate 602 accumulate too much, at this time the filtration efficiency of the second filter plate 602 is reduced, the staff can push the filter assembly 6 to move horizontally as a whole through the two handles 603, so that the second filter plate 602 moves to the top of the second collection bin 702, and at the same time the first filter plate 601 moves to between the storage bin 703 and the flexible folding bin 501 to continue filtering; the spray pipe 8 is connected to the water source filtered by the plate and frame filter press, and the water in the spray pipe 8 is sprayed to the second filter plate 602 through multiple spray nozzles on the spray pipe 8, so that the insoluble calcium salt impurities adhering to the second filter plate 602 are washed away, and the wastewater containing the insoluble calcium salt impurities falls into the second collecting bin 702 and flows into the plate and frame filter press through the drainage pipe 704 for filtration; when the insoluble calcium salt impurities adhering to the first filter plate 601 accumulate too much, the staff resets the filter assembly 6 as a whole, moves the first filter plate 601 to the top of the first collecting bin 701 and allows the spray nozzle to spray and flush the first filter plate 601, so as to clean the filter plate while ensuring that the filtering work is carried out uninterruptedly, thereby increasing the efficiency of the filtering work; and the wastewater containing the insoluble calcium salt impurities can be recycled under the filtration of the plate and frame filter press.

[0047] See also Figure 1-14 In this embodiment, the polymerization kettle 1 comprises a tank body 101, a connecting frame 207 is fixedly connected to the outer side of the tank body 101; a sealing cover 115 is fixedly connected to the top of the tank body 101, a feed port 111 is arranged on the sealing cover 115 and the feed port 111 is communicated with the inside of the tank body 101; a polymerization chamber 102 is arranged at the lower end of the tank body 101, and the outer diameter of the polymerization chamber 102 is smaller than the inner diameter of the tank body 101; baffles 116 are fixedly connected to both ends of the polymerization chamber 102, and a sealing cover 115 is provided in the middle of the two baffles 116. The bin 102 has a through groove with the same inner diameter, and the outer sides of the two baffles 116 are both in contact with the inner wall of the tank body 101; the outer side of the polymerization bin 102 is sleeved with a heater 103, and the heater 103 is located in the space between the two baffles 116; a handle 117 is fixedly connected to one side of the top of the baffle 116 located above the polymerization bin 102; a discharge port 113 is provided in the middle of the bottom of the tank body 101; an inspection port 112 is provided at the lower end of the tank body 101, and a plurality of support columns 114 are evenly fixedly connected to the outer side of the lower end of the inspection port 112;

[0048] A transmission roller 107 is provided in the middle of the polymerization bin 102, and the bottom of the transmission roller 107 is rotatably connected to the bottom of the polymerization bin 102; the top of the transmission roller 107 is fixedly connected to the output end of the reducer 109, and a circular hole is provided in the middle of the sealing cover 115 for the transmission roller 107 to pass through; the bottom of the reducer 109 is fixedly connected to the connecting seat 108, and the bottom of the connecting seat 108 is fixedly connected to the top of the sealing cover 115; the input end of the reducer 109 is fixedly connected to the output shaft of the motor 110; a plurality of connecting rods 106 are fixedly connected to the lower end of the transmission roller 107, and the ends of the plurality of connecting rods 106 away from the transmission roller 107 are fixedly connected to the connecting plate 104; bristles 105 are provided on the side of the connecting plate 104 away from the connecting rod 106, and the plurality of connecting rods 106, the connecting plate 104 and the bristles 105 are all located on the inner side of the polymerization bin 102;

[0049] By adopting the above technical scheme, the dicyandiamide liquid preliminarily filtered by the first filter plate 601 or the second filter plate 602 enters the flexible folding bin 501 and is temporarily stored in the flexible folding bin 501; the flexible folding bin 501 has good ductility. As the amount of dicyandiamide liquid in the flexible folding bin 501 increases, the dicyandiamide liquid can push the top plate 502 to allow the flexible folding bin 501 to continuously expand to increase the storage space of the flexible folding bin 501 itself. When the amount of dicyandiamide liquid in the flexible folding bin 501 is small, multiple springs 504 drive the top plate 502 to descend and reset to reduce the storage space of the flexible folding bin 501, so that the liquid extraction tube 13 on the top plate 502 can always contact the liquid surface of the dicyandiamide liquid in the flexible folding bin 501, ensuring that the liquid extraction tube 13 can always absorb the dicyandiamide liquid in the flexible folding bin 501.

[0050] See also Figure 1-14 In this embodiment, the transfer pipe 705 is fixedly connected to the discharge port 113, and the middle section of the transfer pipe 705 is installed with a solenoid valve 3 and a water pump 11; the middle section of the liquid extraction pipe 13 is installed with a water pump 4; the water pump 4 is fixedly connected to the support seat, and the support seat and the connecting frame 207 are both fixedly connected to the outer wall of the tank body 101; the outer wall of the tank body 101 is fixedly connected with a controller 10;

[0051] The bottoms of the plurality of support columns 114 are fixedly connected to the placement plate 12, and the bottoms of the water pump 11 and the bracket 9 are fixedly connected to the placement plate 12;

[0052] By adopting the above technical scheme, after the water pump 4 is turned on, the water pump 4 can suck the dicyandiamide liquid in the flexible folding bin 501 into the inner cylinder 205 through the liquid extraction pipe 13; the multiple filter holes on the inner cylinder 205 can perform secondary filtration on the dicyandiamide liquid, so that the small volume of insoluble calcium salt impurities in the dicyandiamide liquid remain in the inner cylinder 205; the dicyandiamide liquid moved to the outside of the inner cylinder 205 is a pure dicyandiamide liquid that has been filtered twice, and the pure dicyandiamide liquid finally enters the dicyandiamide liquid storage bin through the discharge pipe 202; the dicyandiamide liquid doped with a small volume of insoluble calcium salt impurities in the inner cylinder 205 re-enters the polymerization bin 102 through the reflux pipe 206, and performs another cycle filtration, thereby ensuring the filtering effect of the dicyandiamide liquid and increasing the purity of the dicyandiamide liquid.

[0053] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A novel dicyandiamide solution filtering device, characterized in that: The invention comprises a polymerization kettle (1) for polymerizing cyanamide liquid, wherein a suction filter cartridge (2) is fixedly connected to the outer side of the upper end of the polymerization kettle (1); a material storage component (5) is provided on one side of the suction filter cartridge (2), and the material storage component (5) is connected to the suction filter cartridge (2) via a liquid extraction pipe (13); a filter component (6) is provided below the material storage component (5), and the filter component (6) is closely connected to a drainage component (7); a spray pipe (8) is provided above the drainage component (7), and a plurality of spray nozzles are provided at both ends of the spray pipe (8); The filtering assembly (6) comprises a first filter plate (601), one side of the first filter plate (601) is fixedly connected to a second filter plate (602), the second filter plate (602) and the first filter plate (601) are arranged in a straight line, and a plurality of filter holes are evenly arranged on the second filter plate (602) and the first filter plate (601); two handles (603) are symmetrically fixedly connected to one side of the first filter plate (601) away from the second filter plate (602); the drainage assembly (7) comprises a storage bin (703), two sides of the storage bin (703) are respectively fixedly connected to A first collecting bin (701) and a second collecting bin (702) are connected, and the bottoms of the first collecting bin (701) and the second collecting bin (702) are fixedly connected to a drainage pipe (704), and one end of the drainage pipe (704) away from the first collecting bin (701) and the second collecting bin (702) is fixedly connected to a plate and frame filter press; a transfer pipe (705) is fixedly connected to one side of the storage bin (703) close to the polymerization kettle (1); and a plurality of spray nozzles of the spray pipe (8) are respectively located above the first collecting bin (701) and the second collecting bin (702); The material storage assembly (5) comprises a flexible folding bin (501), the position of the flexible folding bin (501) corresponds to that of the material storage bin (703), and the first filter plate (601) and the second filter plate (602) are located between the flexible folding bin (501) and the material storage bin (703); the top of the flexible folding bin (501) is fixedly connected to the top plate (502), and the four corners of the top plate (502) are slidably connected to four sliding rods (503) respectively; The outer sides of the upper ends of the four sliding bars (503) are sleeved with springs (504); the tops of the four sliding bars (503) are fixedly connected with nuts (505); the tops of the four springs (504) are respectively fixedly connected to the four nuts (505); the bottoms of the four springs (504) are respectively fixedly connected to the four corners of the top of the top plate (502); the bottoms of the four sliding bars (503) and the bottom of the flexible folding bin (501) are both fixedly connected to the top of the bracket (9); the middle of the top plate (502) is fixedly connected to the liquid extraction tube (13), and the liquid extraction tube (13) extends through the top plate (502) to the inside of the flexible folding bin (501).

2. The novel dicyandiamide solution filtering device as claimed in claim 1, characterized in that: Both sides of the first collecting bin (701), the second collecting bin (702) and the material storage bin (703) are fixedly connected to the bracket (9); the first filter plate (601) and the second filter plate (602) are fitted with the first collecting bin (701), the second collecting bin (702) and the material storage bin (703); the first collecting bin (701), the second collecting bin (702) and the material storage bin (703) are all funnel-shaped, and the dimensions of the first filter plate (601) and the second filter plate (602) are the same as the dimensions of the upper end of the material storage bin (703), and the dimensions of the feeding end of the flexible folding bin (501) are the same as the dimensions of the first filter plate (601) and the second filter plate (602).

3. The novel dicyandiamide solution filtering device as claimed in claim 2, characterized in that: The suction filter cylinder (2) comprises an outer cylinder (201), the top of the outer cylinder (201) is fixedly connected to a top cover (203), and a circular hole is provided in the middle of the top cover (203) for the liquid extraction pipe (13) to pass through; a discharge pipe (202) for transporting pure dicyandiamide liquid is fixedly connected to the bottom of the outer cylinder (201); an inner cylinder (205) is provided inside the upper end of the outer cylinder (201), and the inner cylinder (205) and the outer cylinder (201) are arranged in a concentric circle, and the inner cylinder (205) is provided with a A plurality of filter holes are evenly arranged; a liquid inlet (204) is provided in the middle of the top of the inner cylinder (205), and the liquid inlet (204) is fixedly connected to an end of the liquid extraction tube (13) away from the flexible folding bin (501); a return pipe (206) is provided at the bottom of the inner cylinder (205), and the return pipe (206) extends to the outside of the outer cylinder (201); the outer cylinder (201) is provided with a sealing hole for the return pipe (206) to pass through; and a connecting frame (207) is fixedly connected to the outside of the outer cylinder (201).

4. The novel dicyandiamide solution filtering device as claimed in claim 3, characterized in that: The polymerization kettle (1) comprises a tank body (101), a connecting frame (207) fixedly connected to the outer side of the tank body (101); a sealing cover (115) fixedly connected to the top of the tank body (101), a feed port (111) provided on the sealing cover (115), and the feed port (111) is communicated with the inside of the tank body (101); a polymerization chamber (102) is provided at the lower end of the tank body (101), and the outer diameter of the polymerization chamber (102) is smaller than the inner diameter of the tank body (101); baffles (116) are fixedly connected to both ends of the polymerization chamber (102), and a sealing member (116) is provided in the middle of the two baffles (116) that is connected to the polymerization chamber (102). The tank body (101) is provided with a through groove having the same inner diameter as the tank body (102), and the outer sides of the two baffles (116) are both in contact with the inner wall of the tank body (101); a heater (103) is sleeved on the outer side of the polymerization chamber (102), and the heater (103) is located in the space between the two baffles (116); a handle (117) is fixedly connected to one side of the top of the baffle (116) located above the polymerization chamber (102); a discharge port (113) is provided in the middle of the bottom of the tank body (101); and an inspection port (112) is provided at the lower end of the tank body (101), and a plurality of support columns (114) are evenly and fixedly connected to the outer side of the lower end of the inspection port (112).

5. The novel dicyandiamide solution filtering device as claimed in claim 4, characterized in that: A transmission roller (107) is provided in the middle of the polymerization bin (102), and the bottom of the transmission roller (107) is rotatably connected to the bottom of the polymerization bin (102); the top of the transmission roller (107) is fixedly connected to the output end of the reducer (109), and a circular hole is provided in the middle of the sealing cover (115) for the transmission roller (107) to pass through; the bottom of the reducer (109) is fixedly connected to the connecting seat (108), and the bottom of the connecting seat (108) is fixedly connected to the top of the sealing cover (115); The input end of the speed machine (109) is fixedly connected to the output shaft of the motor (110); a plurality of connecting rods (106) are fixedly connected to the lower end of the transmission roller (107); the ends of the plurality of connecting rods (106) away from the transmission roller (107) are fixedly connected to the connecting plate (104); bristles (105) are provided on the side of the connecting plate (104) away from the connecting rods (106); and the plurality of connecting rods (106), the connecting plate (104) and the bristles (105) are all located inside the polymerization chamber (102).

6. The novel dicyandiamide solution filtering device as claimed in claim 5, characterized in that: The transfer pipe (705) is fixedly connected to the discharge port (113), and a solenoid valve (3) and a second water pump (11) are installed in the middle section of the transfer pipe (705); a first water pump (4) is installed in the middle section of the liquid extraction pipe (13); the first water pump (4) is fixedly connected to the support seat, and the support seat and the connecting frame (207) are both fixedly connected to the outer wall of the tank body (101); and a controller (10) is fixedly connected to the outer wall of the tank body (101).

7. The novel dicyandiamide solution filtering device as claimed in claim 6, characterized in that: The bottoms of the plurality of support columns (114) are all fixedly connected to the placement plate (12), and the bottoms of the second water pump (11) and the bracket (9) are all fixedly connected to the placement plate (12).

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