Filter cake re-pulping device

Abstract

The utility model relates to a filter cake re-pulping device which comprises a pulping tank internally provided with a stirring device, a liquid outlet pipe communicated with a liquid outlet of the pulping tank, and a four-way joint connected to the liquid outlet pipe, one opening of the four-way joint is connected with an emulsification pump, the emulsification pump is communicated with a liquid inlet of the pulping tank through an emulsification pipe, and a valve is arranged on the liquid outlet. Valves are arranged on four openings of the four-way joint, and a filter screen is further arranged in the liquid outlet pipe. According to the preferable scheme, during use, the valve on the liquid outlet is opened, feed liquid is filtered by the filter screen and then enters the emulsifying pump, the feed liquid is further scattered under the action of the emulsifying pump, and then the feed liquid is conveyed into the pulping tank, so that circulating emulsifying and repulping of the feed liquid are realized, and circulating emulsifying and repulping of the feed liquid can be realized by directly using one emulsifying pump; the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to the technical field of mechanical components, and specifically refers to a filter cake re-slurry device. Background Art

[0002] As a new material, hydrotalcite has some unique physical and chemical properties due to its special layered structure, such as adsorption, catalysis, interlayer anion exchangeability, weak alkalinity, etc. Hydrotalcite is now widely used in the chemical, materials, pharmaceutical and other industries.

[0003] Hydrotalcite has a structure and composition similar to that of magnesium hydroxide and aluminum hydroxide. When thermally decomposed, it releases a large amount of water and carbon dioxide and absorbs a large amount of heat, which can reduce the temperature of the combustion system. The water vapor and carbon dioxide gas released by decomposition can dilute and block combustible gases. The magnesium aluminum oxide generated by thermal decomposition and the carbide formed when the polymer material burns form a protective film on the surface of the material, thereby blocking further intrusion of oxygen and also having a flame retardant effect.

[0004] The solid product of hydrotalcite particles after decomposition has a large specific surface area and strong alkalinity. It can promptly absorb the acidic gases and smoke released during thermal decomposition and convert them into corresponding compounds, thereby suppressing and eliminating smoke. Therefore, hydrotalcite is a new type of smoke-suppressing, non-toxic, halogen-free flame retardant. Its flame retardancy is significantly superior to that of aluminum hydroxide and magnesium hydroxide, while combining the advantages of both.

[0005] Hydrotalcite is a non-toxic, heat-stable material. It can be used as a highly effective, non-toxic, and inexpensive heat stabilizer for polyvinyl chloride (PVC). It effectively absorbs the HCl produced by the decomposition of PVC during processing and use, improving PVC processing conditions and thermal stability. It can be used in conjunction with organotin or lead-zinc as a heat stabilizer, or with other additives, to further enhance the thermal stability of PVC.

[0006] Currently, in the production process of hydrotalcite, the filter cake after filtration by the filter press needs to be re-slurried. Due to process requirements, the material needs to be circulated and emulsified and re-slurried. However, the traditional circulated emulsification and re-slurrying process is cumbersome and inefficient. Utility Model Content

[0007] Aiming at the deficiencies of the prior art, the utility model provides a filter cake re-slurrying device, which uses an emulsifying pump to circulate the material liquid for emulsification and re-slurrying, thereby improving efficiency.

[0008] The utility model is realized through the following technical scheme: a filter cake re-slurry device, comprising a pulping tank provided with a stirring device, a liquid outlet pipe connected to the liquid outlet of the pulping tank, and a four-way valve connected to the liquid outlet pipe, one opening of the four-way valve is connected to an emulsification pump, the emulsification pump is connected to the liquid inlet of the pulping tank through the emulsification pipe, a valve is provided on the liquid outlet, and valves are provided on the four openings of the four-way valve. A filter screen is also provided in the liquid outlet pipe.

[0009] When using this preferred solution, the valve on the liquid outlet is opened to allow the slurry to enter the emulsification pump after being filtered through the filter screen. Under the action of the emulsification pump, the slurry is further broken up, and then the slurry is transported to the beating tank, thereby realizing the circulating emulsification and re-slurrying of the slurry. Directly using an emulsification pump can realize the circulating emulsification and re-slurrying of the slurry, thereby improving efficiency.

[0010] Preferably, the stirring device includes a main stirring shaft which is connected to the beating tank and arranged colinearly with the axis of the beating tank, a U-shaped main stirring rod is fixedly connected to the main stirring shaft, a secondary stirring shaft is provided in the beating tank and is located on the side of the main stirring shaft, and stirring blades are provided on the circumferential surface of the secondary stirring shaft.

[0011] This preferred solution facilitates the full stirring and breaking up of the filter cake after filtration by the filter press by arranging the main stirring shaft, the main stirring rod, the secondary stirring shaft and the stirring blades.

[0012] Preferably, the liquid outlet pipe is further connected to a discharge pipe located above the filter screen and with its bottom surface flush with the top surface of the filter screen. The other end of the discharge pipe is connected to a grinding device, and one opening of the four-way pipe is connected to a liquid inlet pipe.

[0013] When this preferred solution is in use, after the filter screen filters the unstirred filter cake, this part of the filter cake remains on the filter screen. In order to make full use of this part of the filter cake, the raw liquid is poured into the liquid inlet pipe, and the valve of the liquid outlet is closed, so that the raw liquid passes through the filter screen from bottom to top, flushing the filter cake on the filter screen into the discharge pipe, and then entering the grinding device along the discharge pipe for grinding, so that this part of the filter cake can be broken up.

[0014] Preferably, the grinding device includes a column with an inner cavity, an upper grinding disc fixed in the column, and a lower grinding disc that cooperates with the upper grinding disc for grinding. A motor that drives the lower grinding disc to rotate is fixed on the column. The inner cavity is also connected to a return liquid pipe connected to the liquid inlet of the pulping tank. The return liquid pipe is provided with a return liquid pump. The top of the column is provided with a feed port connected to the discharge pipe, and the upper grinding disc is provided with a perforation for the feed liquid to flow into the grinding surface.

[0015] When this preferred solution is in use, the slurry enters the upper grinding disc and flows into the grinding surface formed by the upper and lower grinding discs through the perforations. Then the driving motor drives the lower grinding disc to rotate, thereby breaking up and grinding this part of the filter cake. The ground slurry returns to the pulping tank through the return pipe.

[0016] Preferably, the top surface of the upper grinding disc is provided with a conical flow trough with a perforated bottom. This preferred solution plays a role of drainage and guidance through the provision of the flow trough.

[0017] Preferably, the liquid inlet pipe is further connected to a flushing pipe located above the filter screen and inclined toward the filter screen.

[0018] The preferred solution also facilitates the original liquid to flush the filter cake on the filter screen into the discharge pipe through the provision of the flushing pipe.

[0019] Preferably, the discharge pipe is an inclined pipe, and the connection between the discharge pipe and the liquid discharge pipe is located at the top.

[0020] This preferred solution avoids the residue of the feed liquid in the discharge pipe by setting the inclined pipe during use.

[0021] The beneficial effects of the utility model are as follows: the valve on the liquid outlet is opened to allow the feed liquid to enter the emulsification pump after being filtered by the filter screen, and under the action of the emulsification pump, the feed liquid is further broken up, and then the feed liquid is transported to the beating tank, thereby realizing the circulating emulsification and re-slurrying of the feed liquid. Directly using an emulsification pump can realize the circulating emulsification and re-slurrying of the feed liquid, thereby improving efficiency; through the arrangement of the main stirring shaft, the main stirring rod, the secondary stirring shaft and the stirring blades, it is convenient to fully stir and break up the filter cake after filtration by the filter press; after the filter screen filters the filter cake that has not been stirred up, this part of the filter cake remains on the filter screen. In order to make full use of this part of the filter cake, the raw liquid is poured in from the liquid inlet pipe, and the valve of the liquid outlet is closed, so that the raw liquid passes through the filter screen from bottom to top, and the filter cake on the filter screen is flushed into the discharge pipe, and enters the grinding device along the discharge pipe for grinding, thereby being able to break up this part of the filter cake. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the utility model;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0025] As shown in the figure:

[0026] 1. Beating tank, 2. Mixing blades, 3. Secondary mixing shaft, 4. Main mixing shaft, 5. Liquid inlet, 6. Emulsifying pump, 7. Main mixing rod, 8. Liquid outlet, 9. Filter, 10. Liquid outlet pipe, 11. Cross-connection, 12. Liquid inlet pipe, 13. Discharge pipe, 14. Flushing pipe, 15. Column, 16. Liquid flow trough, 17. Upper grinding disc, 18. Lower grinding disc, 19. Liquid return pump. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0028] Refer to the attached Figure 1-3 The utility model provides a filter cake re-slurry device, comprising a beating tank 1 provided with a stirring device, the stirring device comprising a main stirring shaft 4 axially connected to the beating tank 1 and arranged colinearly with the axis of the beating tank 1, a U-shaped main stirring rod 7 is fixedly connected to the main stirring shaft 4, a secondary stirring shaft 3 is provided in the beating tank 1 and located on the side of the main stirring shaft 4, and a stirring blade 2 is provided on the circumferential surface of the secondary stirring shaft 3.

[0029] The beating tank 1 is also provided with a main motor for driving the main stirring shaft 4 to rotate, and the beating tank 1 is also provided with a secondary motor for driving the secondary stirring shaft 3 to rotate.

[0030] The liquid outlet 8 of the pulping tank 1 is connected to the liquid outlet pipe 10, and the liquid outlet 8 is provided with a valve. The upper part of the liquid outlet pipe 10 is connected to a four-way valve 11, and the four openings of the four-way valve 11 are provided with valves. One opening of the four-way valve 11 is connected to the emulsification pump 6, and the emulsification pump 6 is connected to the emulsification pipe, and the other end of the emulsification pipe is connected to the liquid inlet 5 of the pulping tank 1.

[0031] Another opening of the cross-connection 11 is a liquid discharge port for discharging the liquid from the pulping tank 1 , and another opening of the cross-connection 11 is connected to a liquid inlet pipe 12 .

[0032] A filter screen 9 is provided in the liquid outlet pipe 10 , and a discharge pipe 13 is connected to the liquid outlet pipe 10 , which is located above the filter screen 9 and has a bottom surface flush with the top surface of the filter screen 9 . The other end of the discharge pipe 13 is connected to a grinding device.

[0033] The grinding device includes a column 15 with an inner cavity, an upper grinding disc 17 fixed in the column 15, and a lower grinding disc 18 for grinding with the upper grinding disc 17. The lower grinding disc 18 is axially connected in the column 15, and a motor is fixed to the column 15 to drive the lower grinding disc 18 to rotate. The inner cavity is also connected to a return liquid pipe connected to the liquid inlet 5 of the pulping tank 1, and a return liquid pump 19 is provided on the return liquid pipe. The top of the column 15 is provided with a feed port connected to the discharge pipe 13, and the upper grinding disc 17 is provided with a perforation for the feed liquid to flow into the grinding surface.

[0034] The top surface of the upper grinding disc 17 is provided with a tapered liquid flow trough 16 with a perforated bottom. The liquid inlet pipe is also connected to a flushing pipe 14 located above and inclined toward the filter screen 9, and also has a valve. The discharge pipe 13 is an inclined pipe, and the connection between the discharge pipe 13 and the liquid outlet pipe 10 is located at the top.

[0035] When the utility model is in use, the filter cake and the raw liquid are added into the beating tank 1, and then the filter cake after the filtration of the filter press is fully stirred and broken up under the stirring of the main stirring shaft 4, the main stirring rod 7, the secondary stirring shaft 3 and the stirring blade 2. The valve on the liquid outlet 8 is opened to allow the liquid to enter the emulsification pump 6 after being filtered by the filter screen 9. Under the action of the emulsification pump 6, the liquid is further broken up, and then the liquid is transported to the beating tank 1 again, thereby realizing the circulating emulsification and re-slurrying of the liquid. Directly using one emulsification pump 6 can realize the circulating emulsification and re-slurrying of the liquid, thereby improving efficiency.

[0036] After the filter screen 9 filters the unstirred filter cake, this part of the filter cake remains on the filter screen 9. In order to make full use of this part of the filter cake, the raw liquid is poured from the liquid inlet pipe 12 into the liquid outlet pipe 10, and the valves on the liquid outlet 8 and the flushing pipe 14 are closed, so that the raw liquid passes through the filter screen 9 from bottom to top, and the filter cake on the filter screen 9 is flushed into the discharge pipe 13, and then enters the grinding device along the discharge pipe 13 for grinding, so that this part of the filter cake can be broken up.

[0037] In the grinding device, the liquid enters the liquid flow trough 16 on the upper grinding disc 17, and flows into the grinding surface formed by the upper grinding disc 17 and the lower grinding disc 18 through the perforation, and then the driving motor drives the lower grinding disc 18 to rotate, thereby breaking up and grinding this part of the filter cake. The ground liquid returns to the pulping tank 1 through the return pipe.

[0038] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A filter cake reslurry device, characterized in that: The invention comprises a beating tank (1) provided with a stirring device, a liquid outlet pipe (10) connected to a liquid outlet (8) of the beating tank (1), and a four-way valve (11) connected to the liquid outlet pipe (10), wherein one opening of the four-way valve (11) is connected to an emulsification pump (6), and the emulsification pump (6) is connected to a liquid inlet (5) of the beating tank (1) through the emulsification pipe, a valve is provided on the liquid outlet (8), and valves are provided on the four openings of the four-way valve (11), and a filter screen (9) is also provided in the liquid outlet pipe (10).

2. The filter cake reslurry device according to claim 1, characterized in that: The stirring device comprises a main stirring shaft (4) which is axially connected to the beating tank (1) and arranged in line with the axis of the beating tank (1); a U-shaped main stirring rod (7) is fixedly connected to the main stirring shaft (4); a secondary stirring shaft (3) is provided in the beating tank (1) and is located on the side of the main stirring shaft (4); and a stirring blade (2) is provided on the circumferential surface of the secondary stirring shaft (3).

3. The filter cake reslurry device according to claim 1, characterized in that: The liquid outlet pipe (10) is further connected to a discharge pipe (13) located above the filter screen (9) and having a bottom surface flush with the top surface of the filter screen (9). The other end of the discharge pipe (13) is connected to a grinding device. One opening of the four-way (11) is connected to a liquid inlet pipe (12).

4. The filter cake reslurry device according to claim 3, characterized in that: The grinding device comprises a column (15) with an inner cavity, an upper grinding disc (17) fixed in the column (15), and a lower grinding disc (18) cooperating with the upper grinding disc (17) for grinding. A motor for driving the lower grinding disc (18) to rotate is fixed on the column (15). The inner cavity is also connected to a return liquid pipe connected to the liquid inlet (5) of the pulping tank (1). A return liquid pump (19) is provided on the return liquid pipe. A feed inlet connected to the discharge pipe (13) is provided at the top end of the column (15). A perforation is provided on the upper grinding disc (17) for feeding liquid to flow into the grinding surface.

5. The filter cake reslurry device according to claim 4, characterized in that: The top surface of the upper grinding disc (17) is provided with a conical liquid flow trough (16) with a perforated bottom.

6. The filter cake reslurry device according to claim 3, characterized in that: The liquid inlet pipe is also connected to a flushing pipe (14) located above the filter screen (9) and inclined toward the filter screen (9).

7. The filter cake reslurry device according to claim 3, characterized in that: The discharge pipe (13) is an inclined pipe, and the connection between the discharge pipe (13) and the liquid discharge pipe (10) is located at the top.

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