Slurry concentration, dispersion and homogenization device and method

Abstract

The present invention relates to the field of slurry concentration. Specifically disclosed are a slurry concentration, dispersion and homogenization device and method. The slurry concentration, dispersion and homogenization device comprises a dehydration chamber, wherein the dehydration chamber has a slurry inlet at the top or side thereof and a slurry outlet at the bottom thereof; a dehydration assembly is provided inside the dehydration chamber; a slurry dispersing assembly is provided at the slurry outlet, and is provided with a dispersing inlet in communication with the slurry outlet and a finished-product outlet for outputting a finished slurry; and the moisture content of the slurry at the slurry outlet ranges from 15% to 30%, and the finished slurry is a fluid slurry. In the slurry concentration, dispersion and homogenization device of the present invention, after dehydration is completed, the dehydrated slurry is dispersed to break the molecular adhesion within the slurry, effectively improving the fluidity of the slurry, and facilitating subsequent conveyance to the next process such as a spray tower.

Description

Slurry Concentration, Dispersion and Homogenization Device and Method Technical Field

[0001] This invention relates to the field of solution concentration, and particularly to a device and method for slurry concentration, dispersion and homogenization. Background Technology

[0002] In ceramics production, food processing, and the chemical industry, there are many processes that require spray granulation. This typically involves spraying a slurry and then drying it. During spray granulation, the slurry is sprayed into a spray tower where it is dried at high temperatures, and the moisture is burned off to form powder. Therefore, the amount of moisture that needs to be burned off determines the energy consumption of the spray tower. Theoretically, the lower the moisture content of the slurry, the less energy is required.

[0003] However, when the moisture content of the slurry falls below a certain level, the slurry will clump together, resulting in poor fluidity and hindering transmission and spraying. In particular, dewatering is usually carried out by methods such as squeezing and vacuum suction. The closer to the filter media, the more likely the slurry will develop molecular adhesion problems during the dewatering process, forming small clumps that need to be scraped off and collected. This greatly hinders subsequent fluid transmission and can easily clog the pipes.

[0004] The technical problem to be solved by this application is: how to solve the problem of slurry fluidity caused by dehydration and to achieve smooth subsequent slurry transportation. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a slurry concentration, dispersion and homogenization device and method that can dehydrate slurry and maintain its fluidity.

[0006] The technical solution adopted in this invention is as follows:

[0007] The slurry concentration, dispersion and homogenization device includes a dewatering chamber, a slurry inlet at the top or side of the dewatering chamber, a slurry outlet at the bottom of the dewatering chamber, a dewatering component inside the dewatering chamber, a slurry dispersion component at the slurry outlet, and a dispersion inlet connected to the slurry outlet and a finished product outlet for outputting the finished slurry. The slurry moisture content at the slurry outlet is 15%~30%, and the finished slurry is a fluid slurry.

[0008] The slurry concentration, dispersion, and homogenization device of this invention disperses the dewatered slurry after dewatering, breaking up the molecular adhesion of the slurry and effectively improving the slurry's fluidity, making it easier to transport to the next process such as the spray tower.

[0009] In some embodiments, the slurry dispersing component is an ultrasonic vibration component. The ultrasonic vibration component includes an ultrasonic vibration cavity and an ultrasonic generator that cooperates with the ultrasonic vibration cavity. The ultrasonic vibration cavity has an ultrasonic inlet communicating with the slurry outlet, an ultrasonic generating outlet communicating with the ultrasonic generator, and a finished product outlet for outputting the finished slurry. The horizontal height of the finished product outlet is higher than the position where the ultrasonic generator acts on the ultrasonic vibration cavity. Through the ultrasonic vibration component, molecules can be thoroughly dispersed, achieving good flowability.

[0010] In some embodiments, the slurry dispersing component is a dispersing paddle assembly, which includes paddles disposed at the slurry outlet, a feed pipe for conveying the dispersed slurry, and a finished product outlet disposed at one end of the feed pipe.

[0011] In some embodiments, the slurry dispersing component is a ball mill, which receives the slurry from the slurry outlet and ball mills it to output the finished slurry.

[0012] In some embodiments, the dewatering assembly includes a main drive shaft, a drive motor that drives the main drive shaft, and a dewatering unit that rotates with the main drive shaft. The dewatering unit includes a dewatering unit frame and front and rear filter screens that are installed in conjunction with the dewatering unit frame. The dewatering unit forms a water collection chamber through the filter screens and the dewatering unit frame.

[0013] In some embodiments, the water collection chamber is a low-pressure chamber, and the slurry entering through the slurry inlet is a high-pressure slurry, so that the pressure in the water collection chamber is lower than that in the dewatering chamber, thus achieving a positive pressure dewatering structure, and the water in the slurry is squeezed into the water collection chamber by positive pressure.

[0014] In some embodiments, the dewatering unit frame is mounted to the main shaft via a main shaft frame. The main shaft frame includes a mounting plate, and multiple mounting plates are positioned and mounted to the main shaft via positioning rods. The mounting plate is provided with a mounting seat, and a support rod is fixedly mounted on the mounting seat. The dewatering unit frame is mounted to the support rod.

[0015] In some embodiments, a water pipe is provided on the main shaft, and a water outlet is provided in the water collection chamber of the dewatering unit. The water outlet is connected to the water pipe, and a backwashing device is provided at the other end of the water pipe. The backwashing device can be used to backwash the filter screen with backwash water.

[0016] In some embodiments, a chamber frame is provided inside the dehydration chamber, a scraper frame is provided on the chamber frame, and multiple scrapers are provided on the scraper frame. The scrapers are close to the filter screen and have gaps.

[0017] The method for concentrating, dispersing, and homogenizing slurry includes the following steps:

[0018] S1. Feed the slurry with a moisture content of 33%~95% into the dewatering chamber;

[0019] S2. In the dewatering chamber, 3% to 80% of the water in the slurry is removed by positive or negative pressure to obtain a slurry with a water content of 15% to 30%.

[0020] S3. The slurry obtained in step S2 is dispersed by the slurry dispersing component to obtain the finished slurry, which is a self-flowing slurry;

[0021] In step S3, the dispersing component can be an ultrasonic dispersing component, a blade component, or a ball mill component.

[0022] The beneficial effects of this invention are as follows:

[0023] This slurry concentration, dispersion, and homogenization device and method effectively achieves dewatering and dispersion by setting up a dewatering structure and slurry dispersion components. It is particularly suitable for a large degree of dewatering and can still maintain good fluidity even at low water content, effectively solving the problems of pipeline blockage and poor transportation caused by clumping and poor fluidity.

[0024] The slurry concentration, dispersion and homogenization device and method of this application can enhance the dewatering effect and obtain slurry with lower water content, thus saving a lot of heat energy in the subsequent spray granulation process;

[0025] This application also enables continuous production and uninterrupted transportation of finished pulp with low moisture content, making it particularly suitable for continuous operations in large-scale production. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the overall structure of the slurry concentration, dispersion and homogenization device of the present invention;

[0027] Figure 2 is a schematic diagram of the disintegration component in Embodiment 1 of the present invention;

[0028] Figure 3 is a schematic diagram of the dehydration chamber of the present invention;

[0029] Figure 4 is a schematic diagram of the dehydration component of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of the dehydration unit frame in Figure 3;

[0031] Figure 6 is a schematic diagram of the dehydration unit of the present invention;

[0032] Figure 7 is a schematic diagram of the scraper frame of the present invention;

[0033] Figure 8 is a schematic diagram of the recoil device of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Please refer to Figures 1-8. This invention provides a technical solution:

[0037] A slurry concentration, dispersion, and homogenization device includes a dewatering chamber 1, a slurry inlet 2 at the top or side of the dewatering chamber 1, a slurry outlet 3 at the bottom of the dewatering chamber 1, a dewatering component 4 inside the dewatering chamber 1, a slurry dispersion component 31 at the slurry outlet 3, a dispersion inlet 32 ​​communicating with the slurry outlet 3, and a finished product outlet 33 for outputting finished slurry. The slurry moisture content at the finished product outlet 33 is 15%~30%, and the finished slurry is a fluid slurry.

[0038] The slurry dispersing component 31 is an ultrasonic vibration component. The ultrasonic vibration component includes an ultrasonic vibration cavity 34 and an ultrasonic generator 35 that cooperates with the ultrasonic vibration cavity 34. The ultrasonic vibration cavity 34 is provided with a dispersing inlet 32 ​​that communicates with the slurry outlet 3, an ultrasonic generating port that communicates with the ultrasonic generator 35, and a finished product outlet 33 that outputs the finished slurry. The horizontal height of the finished product outlet 33 is higher than the position where the ultrasonic generator 35 acts on the ultrasonic vibration cavity 34.

[0039] The dehydration assembly includes a main drive shaft 41, a drive motor 42 that drives the main drive shaft 41, and a dehydration unit 5 that rotates with the main drive shaft 41. The dehydration unit 5 includes a dehydration unit frame 51 and front and rear filter screens 52 that are installed in conjunction with the dehydration unit frame 51. The dehydration unit 5 forms a water collection chamber 53 through the filter screens 52 and the dehydration unit frame 51.

[0040] The water collection chamber 53 is a low-pressure chamber, and the slurry entering through the slurry inlet 2 is a high-pressure slurry, which makes the pressure in the water collection chamber 53 lower than that in the dewatering chamber 1, thus achieving a positive pressure dewatering structure. The water in the slurry is squeezed into the water collection chamber 53 by positive pressure.

[0041] The dewatering unit frame 51 is installed on the main drive shaft 41 via the main shaft frame 6. The main shaft frame 6 includes a mounting plate 61. Multiple mounting plates 61 are positioned and installed on the main drive shaft 41. Mounting seats 63 are provided on the mounting plates 61. Support rods 64 are fixedly installed on the mounting seats 63. The dewatering unit frame 51 is installed in conjunction with the support rods 64.

[0042] A water pipe 7 is installed on the main drive shaft 41. The water collection chamber 53 of the dewatering unit 5 is provided with a water outlet 54, which is connected to the water pipe 7. The other end of the water pipe 7 is provided with a drain outlet 71, which is provided with a backwash device 9. The backwash device 9 can be used to backwash the filter screen 52.

[0043] The dehydration chamber 1 is provided with a chamber frame 8, and a scraper frame 81 is provided on the chamber frame 8. Multiple scrapers 82 are provided on the scraper frame 81, and the scrapers 82 are close to the filter screen 52 and have gaps.

[0044] In this embodiment, commercially available ceramic slurry is pressurized and input into the slurry inlet 2 via a plunger pump. The commercially available ceramic slurry has a water content of 33% to 40%. After being pressurized and transported into the dewatering chamber 1, the dewatering chamber 1 is filled with high-pressure ceramic slurry. Due to the pressure difference, the water in the ceramic slurry enters the water collection chamber 53 through the filter screen 52. The water in the water collection chamber 53 is transported to the drain outlet 71 through the water pipe 7 and discharged. In this embodiment, according to the subsequent spray granulation production line structure, the water content of the ceramic slurry is concentrated to 20% to 30%. The fluidity of the concentrated and dewatered slurry is poor. Therefore, it must be dispersed and homogenized by the slurry dispersing component 31 to achieve a certain fluidity. In this embodiment, an ultrasonic vibration component is used, and the ultrasonic generator 35 disperses and homogenizes the dewatered slurry.

[0045] The working principle and usage process of this invention: High-pressure slurry is fed into the dewatering chamber 1 through the slurry inlet 2. At this time, the slurry outlet 3 is closed by a solenoid valve. The slurry accumulates and fills the dewatering chamber 1 until it overflows to the dewatering unit frame 51. The drive motor 42 drives the main drive shaft 41 to rotate, which in turn drives the dewatering unit frame 51 to rotate. Since the pressure inside the water collection chamber 53 of the dewatering unit frame 51 is lower than that outside, the water in the slurry enters the water collection chamber 53 through the filter screen 52, thus achieving dewatering. The dewatered slurry is output from the slurry outlet 3 below to the slurry dispersing component 31. The material dispersing component 31 uses an ultrasonic generator 35, which has a strong vibration effect. Therefore, when setting it up, an ultrasonic vibration cavity 34 for vibration and dispersing is required. In order to achieve the best dispersing and homogenization effect, the horizontal height of the finished product outlet 33 is higher than the position where the ultrasonic generator 35 acts on the ultrasonic vibration cavity 34. Thus, the ultrasonic generator 35 can fully exert its effect on the ultrasonic vibration cavity 34. After sufficient vibration, the ceramic slurry flows out obliquely upward from the finished product outlet 33 and enters the subsequent spray granulation device by fluid transportation.

[0046] After being processed by the ultrasonic generator, the slurry effectively breaks down the molecular adhesion between particles, completely solving problems such as clumping and hardening. The particle dispersion and homogenization effect is excellent. Even when the slurry is reducing its moisture content, it still has fluidity, which facilitates subsequent fluid transportation and avoids pipe blockage and poor feeding during the fluid transportation process.

[0047] Because high-pressure ceramic slurry is used, the pressure also provides the power for the fluid transport of the finished ceramic slurry, eliminating the need for an additional transport power structure.

[0048] The amount of water removed depends on the original moisture content of the slurry, the pressure difference, the dewatering time, the filterability of the filter media, and the effective filtration area. The opening and closing control of the solenoid valve at the slurry outlet 3 determines the slurry discharge speed.

[0049] For ceramic slurry granulation, evaporating one kilogram of water requires 600 kcal of heat. For the ceramic industry with large-scale spray granulation, using the concentrated and homogenized ceramic slurry of this embodiment can greatly save the energy consumption of spray granulation and achieve excellent energy-saving effect. At the same time, the concentration and dehydration, dispersion and homogenization, and fluid transportation are all continuous operations, which do not need to be carried out in batches, which also greatly improves the efficiency of the entire production line and effectively increases production capacity.

[0050] Example 2

[0051] The difference from Embodiment 1 is that in this embodiment, the slurry dispersing component 31 adopts a dispersing blade assembly, which includes a blade disposed at the slurry outlet, a feeding pipe for conveying the dispersed slurry, and a finished product outlet disposed at one end of the feeding pipe.

[0052] Example 3

[0053] The difference from Example 1 is that in this example, the slurry dispersing component 31 is a ball mill, which receives the slurry from the slurry outlet and ball mills it to output the finished slurry.

[0054] Example 4

[0055] The difference from Example 1 is that in this example, the concentrated slurry is sweet potato slurry. Typically, the sweet potato slurry to be concentrated has a water content of 90% to 95%. Through the dehydration structure of this example, the slurry can be dehydrated to obtain a sweet potato slurry with a water content of 15% to 20%. After being dispersed and homogenized by the slurry dispersing component 31, the fluidity of the finished slurry can be ensured. Simultaneously, a water circulation device is installed at the drain outlet 71. While the sweet potato slurry is being dehydrated, the dehydrated liquid contains a certain amount of starch. By setting up the water circulation device, this dehydrated liquid can be recycled back into the preparation of the sweet potato slurry.

[0056] Example 5

[0057] The method for concentrating, dispersing, and homogenizing slurry includes the following steps:

[0058] S1. Feed the slurry with a moisture content of 33%~95% into the dewatering chamber;

[0059] S2. In the dewatering chamber, 3% to 80% of the water in the slurry is removed by positive or negative pressure to obtain a slurry with a water content of 15% to 30%.

[0060] S3. The slurry obtained in step S2 is dispersed by the slurry dispersing component to obtain the finished slurry, which is a self-flowing slurry;

[0061] In step S3, the dispersing component is an ultrasonic dispersing component, a blade component, or a ball mill component.

[0062] The ultrasonic dispersing component provides the best homogenization effect, while the blade component is slightly less effective but has a lower overall cost. The ball mill component provides good dispersing and homogenization effect but requires more working time and a larger overall size.

[0063] Users can choose the specific structure of the disassembled components based on their actual cost and condition requirements.

[0064] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A slurry concentration, dispersion, and homogenization device, comprising a dewatering chamber (1), wherein the top or side of the dewatering chamber (1) is provided with a slurry inlet (2), the bottom of the dewatering chamber (1) is provided with a slurry outlet (3), and a dewatering component (4) is provided inside the dewatering chamber (1), characterized in that, The slurry outlet (3) is provided with a slurry dispersing component (31), the slurry dispersing component (31) is provided with a dispersing inlet (32) connected to the slurry outlet (3) and a finished product outlet (33) for outputting finished slurry, the slurry moisture content of the finished product outlet (33) is 15%~30%, and the finished slurry is a fluid slurry; The dehydration assembly includes a main drive shaft (41), a drive motor (42) that drives the main drive shaft (41), and a dehydration unit (5) that rotates with the main drive shaft (41). The dehydration unit (5) includes a dehydration unit frame (51) and front and rear filter screens (52) that are installed in conjunction with the dehydration unit frame (51). The dehydration unit (5) forms a water collection chamber (53) through the filter screens (52) and the dehydration unit frame (51). The water collection chamber (53) is a low-pressure chamber, and the slurry entering through the slurry inlet (2) is a high-pressure slurry, so that the pressure of the water collection chamber (53) is lower than that of the dewatering chamber (1), thus realizing a positive pressure dewatering structure. The water in the slurry is squeezed into the water collection chamber (53) by positive pressure. The dewatering unit frame (51) is installed on the main drive shaft (41) via the main shaft frame (6). The main shaft frame (6) includes a mounting plate (61). Multiple mounting plates (61) are positioned and installed on the main drive shaft (41). A mounting seat (63) is provided on the mounting plate (61). A support rod (64) is fixedly installed on the mounting seat (63). The dewatering unit frame (51) is installed in conjunction with the support rod (64). A water pipe (7) is provided on the main drive shaft (41), and a water outlet (54) is provided in the water collection chamber (53) of the dewatering unit (5). The water outlet (54) is connected to the water pipe (7), and the other end of the water pipe (7) is provided as a drain outlet (71). A backwash device (9) is provided in the drain outlet (71), and the backwash device (9) can be used to backwash water flow to flush the filter screen (52). The dehydration chamber (1) is provided with a chamber frame (8), and a scraper frame (81) is provided on the chamber frame (8). Multiple scrapers (82) are provided on the scraper frame (81), and the scrapers (82) are close to the filter screen (52) and have gaps.

2. The slurry concentration, dispersion, and homogenization device according to claim 1, characterized in that, The slurry dispersing component (31) is an ultrasonic vibration component. The ultrasonic vibration component includes an ultrasonic vibration cavity (34) and an ultrasonic generator (35) that cooperates with the ultrasonic vibration cavity (34). The ultrasonic vibration cavity (34) is provided with a dispersing inlet (32) that communicates with the slurry outlet (3), an ultrasonic generating port that communicates with the ultrasonic generator (35), and a finished product outlet (33) that outputs the finished slurry. The horizontal height of the finished product outlet (33) is higher than the position where the ultrasonic generator (35) acts on the ultrasonic vibration cavity (34).

3. The slurry concentration, dispersion, and homogenization device according to claim 1, characterized in that, The slurry dispersing component (31) is a dispersing paddle assembly. The dispersing paddle assembly includes a paddle disposed at the slurry outlet and a feeding pipe for conveying the dispersed slurry. The finished product outlet is disposed at one end of the feeding pipe.

4. The slurry concentration, dispersion, and homogenization device according to claim 1, characterized in that, The slurry dispersing component (31) is a ball mill, which receives the slurry from the slurry outlet and ball mills it to output the finished slurry.

5. A method for concentrating, dispersing, and homogenizing slurry, using the slurry concentrating, dispersing, and homogenizing device as described in claim 1, comprising the following steps: S1. Feed the slurry with a moisture content of 33%~95% into the dewatering chamber; S2. In the dewatering chamber, 3% to 80% of the water in the slurry is removed by positive or negative pressure to obtain a slurry with a water content of 15% to 30%. S3. The slurry obtained in step S2 is dispersed by the slurry dispersing component to obtain the finished slurry, which is a self-flowing slurry; In step S3, the dispersing component is an ultrasonic dispersing component, a blade component, or a ball mill component.

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