Scum tank for fluosilicic acid concentration process
By designing a scum tank with a simple structure, including a conical bottom plate, a mud collecting cone, an overflow weir and a curved flow edge, the problems of low separation effect and efficiency, blockage and intrinsic adjustment in the prior art are solved, and efficient and flexible separation effect is achieved.
Patent Information
- Application Number
- CN202421859067.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The existing scum tanks have problems such as low separation effect and efficiency in the fluosilicate concentration process, easy clogging of equipment for scum and heavy components, difficulty in flexibly adjusting the solid content of the clean liquid, and accumulation and adhesion of the scum can lead to blockage.
A slag tank with simple structure and easy-to-operate structure is designed, including a groove body and a groove rake inserted in the center of the groove body. The bottom of the groove body is a conical bottom plate, a mud collecting cone is provided in the center, the bottom plate of the overflow weir is an inclined plate, and the flow edge at the top is a curved edge. Multiple clear liquid discharge outlets and recombinant discharge outlets are provided. The groove rake includes the upper and lower blades, and a mud scraper is installed at the lower end.
The synchronous separation of light components, heavy components and clear liquids is achieved, which improves the separation effect and efficiency, avoids the equipment blocking of scum and heavy components, flexibly adjusts the solid content of the clean liquid, and reduces the problem of scum aggregation and adhesion.
Smart Images
Figure CN222889425U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to equipment in a concentration process in the chemical industry, in particular to a scum tank used in a fluosilicic acid concentration process. Background Art
[0002] In the fluosilicic acid concentration process, the mixed liquid after the absorption reaction in the concentrator flows into the scum tank. The scum has a light density and high viscosity and floats on the upper layer of the fluosilicic acid. The function of the scum tank is to use the low-speed raking and sedimentation separation of the tank rake to obtain a fluosilicic acid clear liquid with low solid content in the lower part of the scum tank, and a fluosilicic acid with SiO2 in the upper part. 2 The frothy fluorosilicic acid is sent to the filter for filter pressing, and the heavy components flowing out from the bottom are re-slurried or filtered to remove the solid components.
[0003] The existing scum tank has the following problems: 1. It is necessary to separate the light component, heavy component and clear liquid at the same time, and the separation effect and efficiency of the current structure of the scum tank still need to be improved; 2. The scum and heavy component are easy to block the equipment during the separation process; 3. There is only one clear liquid outlet, which makes it difficult to flexibly adjust the solid content of the separated clear liquid; 4. The top of the tank body is horizontal, and the scum cannot be discharged as quickly as possible with the fluctuation of the liquid level, and it may cause the scum to aggregate and stick together. The aggregated large pieces of scum may be stuck at the top of the tank body and cannot flow to the overflow weir area. Summary of the invention
[0004] The purpose of the utility model is to solve the above technical problems and provide a scum tank for fluosilicic acid concentration process which has simple structure, is easy to operate, has good flexibility, has a long service life, can effectively and synchronously separate light components, heavy components and clear liquid, and has high separation effect and efficiency.
[0005] The technical solution includes a trough body and a trough rake inserted in the center of the trough body. The bottom of the trough body is a conical bottom plate with a mud collecting cone in the center. An overflow weir is provided on the outer periphery of the upper section of the trough body. A feeding port is provided on the top plate of the overflow weir. The bottom plate is an inclined plate, and the light component discharge port on the side wall is close to the lowest point of the bottom plate.
[0006] The top flow-facing edge of the trough body is a curved edge.
[0007] The curve is a wavy line or a jagged line.
[0008] The inclination angle β of the bottom plate of the overflow weir is 3 to 20 degrees.
[0009] The cone angle α of the conical bottom plate at the bottom of the tank body is 10 to 30 degrees.
[0010] The trough rake comprises a rake shaft, the upper end of which passes through the top plate and is connected to a driving device, the upper section of which is equipped with upper blades located at the liquid surface, the lower section is equipped with lower blades located at the bottom of the trough body, and the lower end is equipped with a mud scraper inserted into the mud collecting cone.
[0011] The lower end of the feeding port extends into the upper part of the tank body, and the distance h from the liquid surface is 50 to 400 mm.
[0012] The wall surface of the tank body is sequentially provided with a high-level clear liquid discharge outlet, a middle-level clear liquid discharge outlet and a low-level clear liquid discharge outlet from top to bottom.
[0013] The side wall of the mud collecting cone is provided with a heavy component discharge port, and the bottom is provided with a clean discharge port.
[0014] The bottom plate of the overflow weir is fixed on the outer wall of the tank body via a support member.
[0015] Beneficial effects:
[0016] 1) An overflow weir is provided on the outer periphery of the upper section of the tank body, and the overflow weir is used to collect the scum and discharge it from the light component discharge port. The bottom plate of the overflow weir is designed as an inclined plate, and the preferred inclination angle β is 3-20°. The light component discharge port is set at the side wall of the lowest point of the overflow weir bottom plate. After the scum flows to the overflow weir, it can be discharged as quickly as possible along the slope, effectively avoiding blockage;
[0017] 2) The flow-facing edge at the top of the tank body is a curved edge, such as a serrated line or a wavy line, which can better adapt to liquid level fluctuations and prevent scum from flakes and sticking to each other at the liquid surface, making it difficult to flow to the overflow weir. The bottom plate of the overflow weir is fixed to the outer wall of the tank body through a support member, and the support member does not contact the medium to avoid corrosion. The internal structure of the overflow weir is simple, convenient for assembly and welding, and reduces abrasion; a high-level clear liquid discharge outlet, a middle-level clear liquid discharge outlet, and a low-level clear liquid discharge outlet are set on the wall of the tank body, and clear liquids with different solid contents can be obtained from different outlets according to the medium conditions and process operation parameters.
[0018] 3) The tank body has a conical bottom plate, and the cone angle α is preferably 10-30. A mud collecting cone is set in the center of the bottom plate. The heavy component settles by gravity and is scraped to the middle mud collecting cone by the lower blades of the low-speed tank rake. A heavy component discharge port is set on the mud collecting cone to discharge the heavy component with high solid content; a spare pipe port is set to connect high-pressure liquid to dilute the heavy component or flush the mud collecting cone, and there is a drain port at the bottom.
[0019] 4) The lower end of the feeding port extends into the top of the tank body. The extension of the feeding port is beneficial to reducing the disturbance of the liquid surface by the feed. The preferred distance h from the liquid surface is 50 to 400 mm to avoid interference between the feeding port and the upper paddles. The h value cannot be too large to avoid the feed impacting the liquid surface, flushing the scum into the clear liquid, and disturbing the floating of the scum.
[0020] 5) The upper blades of the rake are near the liquid surface, driving the scum inside to the outside, so that the scum overflows and is discharged; the lower blades are close to the bottom of the cone, scraping the heavy component slurry into the mud collecting cone for collection. The rake shaft is driven by a drive device, and the speed and height can be adjusted according to the viscosity or solid content of the medium.
[0021] The utility model has the advantages of simple structure, easy operation, good flexibility, long service life, and can effectively and synchronously separate light components, heavy components and clear liquid, with high separation effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the structure of the utility model.
[0023] Among them, 1-trough rake; 1.1-driving device; 1.2-upper blade; 1.3-rake shaft; 1.4-lower blade; 1.5-scraper; 2-top plate; 3-overflow weir; 3.1-bottom plate; 3.2-support; 4-trough body; 4.1-toothed upstream edge; 4.2-wavy upstream edge; 5-conical bottom plate, 6-mud collecting cone; 7-light component discharge port, 8-heavy component discharge port; 9-feeding port; 10-high-level clear liquid discharge port; 11-middle-level clear liquid discharge port; 12-low-level clear liquid discharge port; 13-spare pipe port; 14-drain port DETAILED DESCRIPTION
[0024] The utility model is further explained below in conjunction with the accompanying drawings:
[0025] See also Figure 1 The utility model comprises a tank body 4, a tank rake 1 inserted in the center of the tank body 4, and an overflow weir 3 arranged on the outer periphery of the upper section of the tank body.
[0026] Among them, the top upstream edge of the trough body 4 is a curved edge, and the figure shows a wavy upstream edge 4.1 and a toothed upstream edge 4.2, which can better adapt to liquid level fluctuations. The trough body wall is sequentially provided with a high-level clear liquid discharge outlet 10, a middle-level clear liquid discharge outlet 11 and a low-level clear liquid discharge outlet 12 from top to bottom, which can lead out clear liquids with different sedimentation effects and different solid contents at different liquid level heights as needed, with good flexibility. The bottom of the tank body 4 has a conical bottom plate 5, and the cone angle α is preferably 10-30°. The appropriate cone angle has a certain gravity self-flow effect on the lower layer of heavy component slurry, so that the heavy component slurry is scraped to the mud collecting cone 6 by the lower blade 1.4 as soon as possible, reducing the disturbance in the tank and avoiding affecting the sedimentation effect of other areas; when the cone angle is too large, there is no obvious improvement in the scraping of the heavy component slurry, and the height of the cone bottom is increased, which is not economical; a mud collecting cone 6 is provided in the center of the conical bottom plate 5 for collecting the heavy component slurry, and the side wall of the mud collecting cone 6 is provided with a heavy component discharge port 8 for discharging heavy components with high solid content, and a spare pipe port 13 is provided, which can be connected to high-pressure liquid to dilute the heavy component or flush the mud collecting cone 6. A drain port 14 is provided at the bottom.
[0027] A feeding port 9 is provided on the top plate of the overflow weir 3, and the lower end of the feeding port 9 extends into the top of the tank body 4, preferably at a distance h of 50 to 400 mm from the liquid surface. Too large a distance may cause the feed to impact the liquid surface, flush the scum into the clear liquid, and disturb the floating of the scum. The bottom plate 3.1 of the overflow weir 3 is an inclined plate, fixed to the outer wall of the tank body 4 via a support member 3.2, preferably with an inclination angle β of 3 to 20°, and the light component discharge port 7 on the side wall is close to the lowest point of the bottom plate 3.1, which can effectively discharge the light component.
[0028] The trough rake 1 comprises a rake shaft 1.3, the upper end of which passes through a top plate 2 and is connected to a driving device 1.1, the upper section of the rake shaft 1.3 is provided with an upper blade 1.2 (located at the liquid surface), the lower section is provided with a lower blade 1.4 (located at a conical bottom plate 5 at the bottom of the trough body 4), and the lower end is provided with a mud scraper 1.5 inserted into a mud collecting cone 6.
[0029] Embodiment: The feed medium (fluorosilicic acid solution) enters the tank body 4 from the feed port 9; at the same time, the tank rake 1 rotates slowly, driving the upper blade 1.2, the lower blade 1.4 and the scraper 1.5 to rotate simultaneously, and the fluorosilicic acid scum floats up and overflows from the top of the tank body 4 to the overflow weir 3, flows along the bottom plate 3.1 to the light component discharge port 7, and the heavy component at the bottom of the tank body 4 falls into the mud collecting cone 6 under the action of the lower blade 1.4, and is finally discharged from the heavy component discharge port 8. The fluorosilicic acid clear liquid in the tank body 4 is discharged from the high clear liquid discharge port 10, the middle clear liquid discharge port 11 and the low clear liquid discharge port 12 on any of the tank bodies 4 at the same time or as needed.
Claims
1. A scum tank used in a fluosilicic acid concentration process, comprising a tank body and a tank rake inserted in the center of the tank body, the bottom of the tank body is a conical bottom plate, and a mud collecting cone is provided in the center, characterized in that: An overflow weir is arranged on the outer periphery of the upper section of the tank body, a feeding port is arranged on the top plate of the overflow weir, the bottom plate is an inclined plate, and the light component discharge port of the side wall is close to the lowest point of the bottom plate.
2. The scum tank for fluosilicic acid concentration process according to claim 1, characterized in that: The top flow-facing edge of the trough body is a curved edge.
3. The scum tank for the fluosilicic acid concentration process according to claim 2, characterized in that: The curve is a wavy line or a jagged line.
4. The scum tank for the fluosilicic acid concentration process according to any one of claims 1 to 3, characterized in that: The inclination angle β of the bottom plate of the overflow weir is 3 to 20 degrees.
5. The scum tank for fluosilicic acid concentration process according to any one of claims 1 to 3, characterized in that: The cone angle α of the conical bottom plate at the bottom of the tank body is 10 to 30 degrees.
6. The scum tank for fluosilicic acid concentration process according to any one of claims 1 to 3, characterized in that: The trough rake comprises a rake shaft, the upper end of which passes through the top plate and is connected to a driving device, the upper section of which is equipped with upper blades located at the liquid surface, the lower section is equipped with lower blades located at the bottom of the trough body, and the lower end is equipped with a mud scraper inserted into the mud collecting cone.
7. The scum tank for fluosilicic acid concentration process according to any one of claims 1 to 3, characterized in that: The lower end of the feeding port extends into the upper part of the tank body, and the distance h from the liquid surface is 50 to 400 mm.
8. The scum tank for fluosilicic acid concentration process according to any one of claims 1 to 3, characterized in that: The wall surface of the tank body is sequentially provided with a high-level clear liquid discharge outlet, a middle-level clear liquid discharge outlet and a low-level clear liquid discharge outlet from top to bottom.
9. The scum tank for fluosilicic acid concentration process according to any one of claims 1 to 3, characterized in that: The side wall of the mud collecting cone is provided with a heavy component discharge port, and the bottom is provided with a clean discharge port.
10. The scum tank for fluosilicic acid concentration process according to any one of claims 1 to 3, characterized in that: The bottom plate of the overflow weir is fixed on the outer wall of the tank body via a support member.