A multi-stage filtering device for inorganic pigment production

Abstract

This application discloses a multi-stage filtration device for inorganic pigment production, belonging to the technical field of inorganic pigment production equipment. It includes a device body, internally comprising a primary filtration unit, a secondary cyclone unit, a precision filtration unit, and a heating module. The design is novel and the device ingenious. The slurry enters the coarse filter screen through the feed inlet. A vibrating motor prevents screen clogging. After preliminary filtration, the slurry enters the cyclone chamber, where centrifugal force separates medium-sized particles. Finally, it undergoes precision filtration through a sintered filter element. The backwash pipeline periodically reverse-flushes the filter element, triggering a backwash program every two hours for 30 seconds. Before shutdown, the feed is shut off, and the backwash is run three times. This improves filtration accuracy and effectively reduces the impurity content of the finished product. The backwash design extends the filter element's lifespan and maintenance cycle. The synergistic effect of cyclone and vibration increases the throughput when processing high-viscosity slurries, greatly enhancing the device's practicality.

Description

Technical Field

[0001] This application relates to the field of inorganic pigment production equipment technology, and in particular to a multi-stage filtration device for inorganic pigment production. Background Technology

[0002] In the production of inorganic pigments, slurry filtration is a key step in ensuring product quality. Traditional filtration technology usually uses single-stage filtration or simple multi-stage series filtration. However, due to the wide particle size distribution and high viscosity of inorganic pigment particles, problems such as filter clogging and low filtration efficiency are easily caused.

[0003] Currently, the industry mainly adopts the following three filtration solutions: First, centrifugal filtration, which uses centrifugal force to separate solid particles, but it has high energy consumption and insufficient retention rate for micron-sized particles; second, plate and frame filter press, which uses pressure to drive filtration, and although it has high filtration accuracy, it requires frequent disassembly and cleaning and has high labor costs; third, vibrating screen filtration, which uses mechanical vibration to prevent screen clogging, but it has poor adaptability to viscous slurries and fine particles can easily penetrate the screen.

[0004] Centrifugal filtration presents a contradiction between energy consumption and fine particle residue; plate and frame filter presses rely on manual intervention and have a low degree of automation; and vibrating screen filtration is difficult to balance in terms of precision and throughput. None of these three methods can achieve efficient, low-consumption, and maintenance-free continuous filtration.

[0005] Therefore, this application proposes a multi-stage filtration device for the production of inorganic pigments. Utility Model Content

[0006] This application proposes a multi-stage filtration device for inorganic pigment production to solve the problems mentioned in the background art. The slurry enters the coarse filter screen through the feed inlet. A vibrating motor prevents the screen from clogging. After preliminary filtration, it enters the cyclone chamber, where centrifugal force separates medium-sized particles. Finally, it undergoes precision filtration through a sintered filter element. The backwash pipeline periodically reverse-flushes the filter element. The backwash program is triggered every two hours and lasts for 30 seconds. Before shutdown, the feed is shut off, and the backwash is run three times. This improves filtration accuracy and effectively reduces the impurity content of the finished product. The backwash design extends the filter element life and maintenance cycle. The synergistic effect of cyclone and vibration increases the throughput when processing high-viscosity slurries, greatly enhancing the practicality of the device.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] A multi-stage filtration device for inorganic pigment production includes a device body, inside which are arranged a primary filtration unit, a secondary cyclone unit, a precision filtration unit, and a heating module. The primary filtration unit is located at the top of the device body, the precision filtration unit is located at the bottom of the device body, the secondary cyclone unit is located between the primary filtration unit and the precision filtration unit, and the heating module is located at the inlet of the primary filtration unit.

[0009] In a preferred embodiment, the primary filtration unit includes an inlet and a coarse filter screen, the coarse filter screen being installed below the inlet via a filter screen frame;

[0010] By installing a coarse filter screen below the feed inlet to perform preliminary filtration of the slurry entering the device body, the practicality of the device is improved.

[0011] In a preferred embodiment, the primary filtration unit further includes a vibration motor, which is fixedly connected to one side of the bottom of the filter frame;

[0012] The slurry enters the coarse filter screen through the feed inlet. The vibrating motor prevents screen clogging, thus improving the practicality of the device.

[0013] In a preferred embodiment, the secondary cyclone unit includes a conical cyclone chamber and a pneumatic slag discharge valve. The conical cyclone chamber is fixedly connected to the outlet of the coarse filter screen, and a pneumatic slag discharge valve is provided at its bottom.

[0014] The slurry enters the coarse filter screen through the feed inlet, and after preliminary filtration, it enters the cyclone chamber where centrifugal force separates medium-sized particles, thereby improving the practicality of the device.

[0015] In a preferred embodiment, the precision filtration unit includes a sintered metal filter element and a backwash pipeline, wherein the sintered metal filter element is vertically connected to the outlet of the conical vortex chamber;

[0016] By using sintered filter elements for precision filtration, the filtration accuracy is improved, and the impurity content of the finished product is effectively reduced, thereby enhancing the practicality of the equipment.

[0017] In a preferred embodiment, the backflush line is connected to the inlet and outlet of the sintered metal filter element, and the end of the backflush line away from the sintered metal filter element is connected to the input and output ends of the circulation pump, respectively.

[0018] The filter element is periodically flushed in reverse through the backflushing pipeline. The backflushing program is triggered every two hours and lasts for 30 seconds. Before shutdown, the feed is turned off and the backflushing is run three times. This solves the problem of high impurity content in the finished product caused by insufficient single-stage filtration accuracy, thereby improving the practicality of the device.

[0019] In a preferred embodiment, the precision filtration unit further includes a discharge port and a valve, wherein the discharge port is located at the outlet of the sintered metal filter element and the valve is provided on the discharge port;

[0020] After passing through multiple filtration stages, the slurry is discharged from the outlet of the sintered metal filter element by opening the valve, thereby improving the practicality of the device.

[0021] In a preferred embodiment, the heating module includes a conveying pipe and a steam coil, wherein the conveying pipe is fixedly connected to the feed inlet and the steam coil is built into the conveying pipe;

[0022] By adding a preheating module and installing a steam coil before the feed inlet, the slurry is preheated to 50-60℃ to reduce viscosity and improve cyclone separation efficiency, thereby enhancing the practicality of the device.

[0023] The beneficial effects of this application are:

[0024] 1. This multi-stage filtration device for inorganic pigment production involves feeding slurry into a coarse filter screen via an inlet. A vibrating motor prevents screen clogging. After preliminary filtration, the slurry enters a cyclone chamber where centrifugal force separates medium-sized particles. Finally, it undergoes precision filtration through a sintered filter element. The backwash pipeline periodically reverse-flushes the filter element, triggering a backwash program every two hours for 30 seconds. Before shutdown, the feed is shut off, and the backwash is run three times. This improves filtration accuracy and effectively reduces the impurity content of the finished product. The backwash design extends the filter element's lifespan and maintenance cycle. The synergistic effect of cyclone and vibration increases throughput when processing high-viscosity slurries, greatly enhancing the device's practicality.

[0025] 2. This multi-stage filtration device for inorganic pigment production, by adding a preheating module and installing a steam coil before the feed inlet, preheats the slurry to 50-60℃ to reduce viscosity and improve cyclone separation efficiency, greatly enhancing the practicality of the device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the device in this application;

[0027] Figure 2 This is a schematic diagram of the internal structure of the device in this application;

[0028] Figure 3 This is a schematic diagram of the precision filtration unit of the device in this application;

[0029] Figure 4 For this application Figure 2 Enlarged view of point A in the middle.

[0030] The following are the labels in the diagram: 1. Main body of the device; 2. Primary filtration unit; 21. Feed inlet; 22. Coarse filter screen; 221. Filter screen frame; 23. Vibration motor; 3. Secondary cyclone unit; 31. Conical cyclone chamber; 32. Pneumatic slag discharge valve; 4. Precision filtration unit; 41. Sintered metal filter element; 42. Backflushing pipeline; 421. Circulation pump; 43. Discharge port; 44. Valve; 5. Heating module; 51. Conveying pipe; 52. Steam coil. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0032] Reference Figure 1-4 A multi-stage filtration device for inorganic pigment production includes a device body 1. The device body 1 is internally equipped with a primary filtration unit 2, a secondary cyclone unit 3, a precision filtration unit 4, and a heating module 5. The primary filtration unit 2 is located at the top of the device body 1, the precision filtration unit 4 is located at the bottom of the device body 1, the secondary cyclone unit 3 is located between the primary filtration unit 2 and the precision filtration unit 4, and the heating module 5 is located at the inlet of the primary filtration unit 2.

[0033] Reference Figure 1-2 The primary filtration unit 2 includes an inlet 21 and a coarse filter screen 22. The coarse filter screen 22 is installed below the inlet 21 via a filter screen frame 221. By setting the coarse filter screen 22 below the inlet 21, the slurry entering the device body 1 is initially filtered, thereby improving the practicality of the device.

[0034] Reference Figure 1-2 The primary filtration unit 2 also includes a vibration motor 23, which is fixedly connected to the bottom side of the filter screen frame 221. The slurry enters the coarse filter screen 22 through the feed inlet 21. The vibration motor 23 can prevent the screen from clogging, thereby improving the practicality of the device.

[0035] Reference Figure 1-2 The secondary cyclone unit 3 includes a conical cyclone chamber 31 and a pneumatic slag discharge valve 32. The conical cyclone chamber 31 is fixedly connected to the outlet of the coarse filter screen 22, and the pneumatic slag discharge valve 32 is provided at its bottom. The slurry enters the coarse filter screen 22 through the feed inlet 21, and after preliminary filtration, it enters the cyclone chamber. Centrifugal force separates medium particles, thereby improving the practicality of the device.

[0036] Reference Figure 2-3 The precision filtration unit 4 includes a sintered metal filter element 41 and a backwash pipe 42. The sintered metal filter element 41 is vertically connected to the outlet of the conical vortex chamber 31. Through precision filtration by the sintered filter element, the filtration accuracy is improved and the impurity content of the finished product is effectively reduced, thereby improving the practicality of the device.

[0037] Reference Figure 2-3The backflushing pipe 42 is connected to the inlet and outlet of the sintered metal filter element 41. The end of the backflushing pipe 42 away from the sintered metal filter element 41 is connected to the input and output ends of the circulating pump 421 respectively. The filter element is flushed in reverse through the backflushing pipe 42 at regular intervals. The backflushing program is triggered every two hours and lasts for 30 seconds. Before stopping the machine, the feed is turned off and the backflushing is run three times. This solves the problem of high impurity content in the finished product caused by insufficient single-stage filtration accuracy, thereby improving the practicality of the device.

[0038] Reference Figure 2-3 The precision filtration unit 4 also includes a discharge port 43 and a valve 44. The discharge port 43 is located at the outlet of the sintered metal filter element 41, and the valve 44 is installed on the discharge port 43. After the slurry has been filtered through multiple layers, the valve 44 is opened, and the slurry is discharged from the outlet of the sintered metal filter element 41 through the discharge port 43, thereby improving the practicality of the device.

[0039] Reference Figure 1-2 The heating module 5 includes a conveying pipe 51 and a steam coil 52. The conveying pipe 51 is fixedly connected to the inlet of the feed port 21, and the steam coil 52 is built into the conveying pipe 51. By adding the preheating module 5 and setting the steam coil 52 in front of the feed port 21, the slurry is preheated to 50-60℃ to reduce the viscosity and improve the cyclone separation efficiency, thereby improving the practicality of the device.

[0040] Working principle: The vibrating motor 23 is started, and the feed valve is opened. The slurry enters the coarse filter screen 22 through the feed inlet 21. The vibrating motor 23 prevents screen clogging. After preliminary filtration, the slurry enters the cyclone chamber, where centrifugal force separates medium-sized particles. Observe the pressure gauge in the cyclone chamber; when it exceeds 0.3 MPa, the pneumatic slag discharge valve 32 is activated. Finally, the slurry undergoes precision filtration through the sintered filter element. The backwash pipeline 42 periodically reverse-flushes the filter element, triggering a backwash program every two hours for 30 seconds. Before stopping the machine, the feed is closed, and then the backwash is run three times. This improves filtration accuracy and effectively reduces the impurity content of the finished product, solving the problem of high impurity content in the finished product caused by insufficient single-stage filtration accuracy. The backflushing design extends the filter cartridge life and maintenance cycle, solving the problems of complex structure and high maintenance cost of traditional multi-stage filtration devices. The synergistic effect of cyclone and vibration increases the throughput when processing high-viscosity slurries, solving the problem that high-viscosity slurries can easily cause filter screen clogging and affect continuous production. By adding a preheating module 5 and setting a steam coil 52 before the feed inlet 21, the slurry is preheated to 50-60℃ to reduce viscosity and improve cyclone separation efficiency.

[0041] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and the inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A multi-stage filtration device for inorganic pigment production, comprising a device body (1), characterized in that, The device body (1) is equipped with a primary filtration unit (2), a secondary vortex unit (3), a precision filtration unit (4) and a heating module (5). The primary filtration unit (2) is located at the top of the device body (1), the precision filtration unit (4) is located at the bottom of the device body (1), the secondary vortex unit (3) is located between the primary filtration unit (2) and the precision filtration unit (4), and the heating module (5) is located at the inlet of the primary filtration unit (2).

2. The multi-stage filtration device for inorganic pigment production according to claim 1, characterized in that, The primary filtration unit (2) includes an inlet (21) and a coarse filter (22), the coarse filter (22) being installed below the inlet (21) via a filter frame (221).

3. A multi-stage filtration device for inorganic pigment production according to claim 1, characterized in that, The primary filtration unit (2) also includes a vibration motor (23), which is fixedly connected to the bottom side of the filter frame (221).

4. A multi-stage filtration device for inorganic pigment production according to claim 1, characterized in that, The secondary cyclone unit (3) includes a conical cyclone chamber (31) and a pneumatic slag discharge valve (32). The conical cyclone chamber (31) is fixedly connected to the outlet of the coarse filter screen (22), and a pneumatic slag discharge valve (32) is provided at its bottom.

5. A multi-stage filtration device for inorganic pigment production according to claim 1, characterized in that, The precision filtration unit (4) includes a sintered metal filter element (41) and a backflushing pipeline (42), wherein the sintered metal filter element (41) is vertically connected to the outlet of the conical vortex chamber (31).

6. A multi-stage filtration device for inorganic pigment production according to claim 5, characterized in that, The backflush line (42) is connected to the inlet and outlet of the sintered metal filter element (41), and the end of the backflush line (42) away from the sintered metal filter element (41) is connected to the input and output ends of the circulation pump (421) respectively.

7. A multi-stage filtration device for inorganic pigment production according to claim 1, characterized in that, The precision filtration unit (4) also includes a discharge port (43) and a valve (44). The discharge port (43) is located at the outlet of the sintered metal filter element (41), and the valve (44) is provided on the discharge port (43).

8. A multi-stage filtration device for inorganic pigment production according to claim 1, characterized in that, The heating module (5) includes a conveying pipe (51) and a steam coil (52). The conveying pipe (51) is fixedly connected to the inlet of the feed port (21), and the steam coil (52) is built into the conveying pipe (51).

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