Mixed slurry desanding device
Through the design of the mixed slurry sand removal device, the problem of incomplete removal of sand with small particle size in the existing technology is solved by using technical means such as tangential feeding, inclined baffle and steam jet heating, and the problem of incomplete removal of sand with small particle size in the existing technology is achieved, and efficient solid-liquid separation and equipment protection is achieved.
Patent Information
- Application Number
- CN202422402408.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The existing sand removal process does not have obvious effect on sand removal with smaller particle sizes, resulting in sand particles being easily wrapped and sand in the slurry, causing clogging and wear of the rear end equipment.
A mixed slurry sand removal device is adopted, including a sand precipitation tank, tangential feed, inclined baffle, steam injection and heating device, and the separation between sand and liquid is achieved through centrifugal separation, impact action and steam heating, and solid-liquid separation is performed by combining a sand discharge spiral pump and a sand collection box.
Effectively remove sand with smaller particle size, improves sand removal effect, prevents clogging and wear of the rear-end equipment, and enhances solid-liquid separation efficiency.
Smart Images
Figure CN223275953U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of garbage disposal, in particular to a mixed slurry sand removal device. Background Art
[0002] As solid waste with a high organic matter content, food waste has a high value for resource utilization. Its separation and treatment before use is a prerequisite for effective resource utilization. The current mainstream disposal process is "sorting and impurity removal + crushing and pulping + three-phase separation". The mixed slurry after crushing and pulping is mixed with a large amount of sand and impurities that cannot be separated after crushing. They must be removed from the slurry through an enhanced disposal process, otherwise it is easy to cause problems such as blockage and wear of the three-phase separation equipment at the back end. Conventional sand and impurity removal processes can only remove sand with larger particle sizes. For sand with smaller particle sizes, especially those less than 8mm, the removal effect is not obvious. Sand particles are easily wrapped in the slurry and enter the back end with the slurry. Summary of the Invention
[0003] Aiming at the shortcoming that the existing sand removal process has an insignificant sand removal effect on sand with smaller particle sizes, the utility model provides a mixed slurry sand removal device, which can remove sand with smaller particle sizes and has a good sand removal effect.
[0004] A mixed slurry sand removal device, which includes a sand sedimentation tank, which includes a cylindrical tank body and a conical tank bottom, the tank body is provided with a liquid level gauge, a feed port is provided on the top of one side of the tank body, and a discharge port is provided in the middle of the other side of the tank body, and is characterized in that: the feed of the feed port is tangential feeding; a steam inlet is provided on the top surface of the tank body, and an inclined baffle is connected to the inner wall of the tank body, the baffle is located in front of the discharge port, the height of the top end of the baffle is higher than the height of the bottom end of the feed port, and the height of the bottom end of the baffle is lower than the height of the bottom end of the discharge port; the bottom of the tank bottom is connected to the sand collecting box through a sand discharge valve.
[0005] It is further characterized by:
[0006] The feed port is tangentially connected to the side wall of the tank body;
[0007] The baffle is trapezoidal;
[0008] The angle between the baffle and the horizontal plane is 60°;
[0009] The baffle is welded to the inner wall of the tank by angle steel;
[0010] An overflow port is provided on the upper portion of the sand collecting box;
[0011] The sand collecting box is provided with a sand discharge spiral pump;
[0012] The sand removal spiral pump is arranged obliquely, the inlet of the sand removal spiral pump is arranged at the bottom of the sand collecting box, and the outlet is connected to the outside;
[0013] The tank body is provided with a heating device;
[0014] The discharge port is provided with a temperature sensor.
[0015] After adopting the above-mentioned structure of the utility model, the mixed slurry enters the sand sedimentation tank through the feed port, and the feed liquid is fed tangentially. After entering the tank, the feed liquid can rotate rapidly along the inner wall of the tank body to form a centrifugal effect, thereby achieving the initial separation of sand and liquid. After that, the feed liquid collides with the baffle, and due to the impact of the baffle inside the tank, the flow rate of the mixed slurry entering the tank is reduced, thereby strengthening the sedimentation effect of the solid phase and ensuring a good sand removal effect; the steam inlet adopts a direct steam injection type, and the injected steam reduces the solid content of the feed liquid and enhances the sedimentation of the sand and gravel. The injected steam reduces the solid content of the feed liquid and enhances the sedimentation of the sand and gravel, thereby enhancing the sand removal effect. The liquid phase of the slurry that has been decelerated and steam-heated is discharged through the discharge port, and the sand produced by the initial sedimentation enters the lower sand collecting box through the sand discharge valve at the bottom of the tank, achieving solid-liquid separation, thereby removing sand with smaller particle size in the slurry. The tank is equipped with a heating device to accelerate the heating of the slurry to reduce its viscosity, further enhance the sedimentation of sand and gravel, and improve the sand removal effect. The heavy phase deposited in the sand collection box is discharged by the sand pulling screw, and the liquid phase overflows into the slurry transfer tank, thereby further removing the organic light phase and solid sand and gravel, further ensuring excellent sand removal results. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural diagram of the utility model;
[0017] Figure 2 It is a structural diagram of the sand sedimentation tank;
[0018] Figure 3 Schematic diagram of the sand sedimentation tank from a bird's-eye view. DETAILED DESCRIPTION
[0019] See Figures 1 to 3A mixed slurry desanding device includes a sand settling tank 1, which comprises a cylindrical tank body 2 and a conical tank bottom 3. Tank body 2 is provided with a liquid level gauge (not shown). The liquid level gauge controls the liquid inflow into the sand settling tank 1. In this embodiment, feeding is started when the liquid level drops to 40% and stopped when the liquid level reaches 80%. A steam inlet 23 is provided on the top surface of the tank body 2, and a feed port 21 is provided on the top of one side of the tank body 2. The feed port 21 is provided on the tank wall of the tank body and is arranged tangentially to the tank wall or the feed port is directly perpendicular to the tank wall. The outlet of the external feed pipe is arranged obliquely and is arranged tangentially to the inner wall of the tank body at the feed port 21. A discharge port 22 is provided in the middle of the other side of the tank body 2. An inclined baffle 4 is connected to the inner wall of the tank body 2. The baffle 4 is located in front of the discharge port 22. The height of the top of the baffle 4 is higher than the height of the bottom of the feed port 21, and the height of the bottom of the baffle 4 is lower than the height of the bottom of the discharge port 22. The baffle 4 is trapezoidal, and the angle between the baffle 4 and the horizontal plane is determined by the specific situation. In the figure, α is 60°, which can ensure that the sand material will not stay on the baffle 4 while the baffle 4 has an impact effect. The baffle 4 is welded to the inner wall of the tank body 2 by angle steel.
[0020] The bottom of the tank bottom 3 is connected to the sand collecting box 7, and an overflow port 9 is opened on the upper part of the sand collecting box 7; the sand collecting box 7 is inclinedly provided with a sand discharge spiral pump 9; the inlet of the sand discharge spiral pump 9 is arranged at the bottom of the sand collecting box 7, and the outlet is connected to the outside world; the liquid phase overflows into the slurry transfer tank, and the tank body 2 is provided with a heating device.
[0021] The discharge port 22 is provided with a temperature sensor (not shown) for controlling the steam injection. In this embodiment, steam injection is started when the outlet liquid temperature reaches 40°C and is stopped when the outlet liquid temperature reaches 80°C.
[0022] The working principle of the present invention is as follows: After startup, the mixed slurry is fed tangentially through the feed port 21. Once inside the tank, the slurry rapidly rotates along the inner wall of the tank, creating a centrifugal effect, achieving a preliminary separation of the grit and liquid. The slurry then collides with the baffle 4, which reduces the flow rate of the mixed slurry entering the tank, thereby enhancing the sedimentation of the solid phase. Steam is injected directly into the tank through the steam inlet at the top, heating the slurry. This steam reduces the solids content of the slurry and enhances the sedimentation of the grit. Simultaneously, the heating device in the tank 2 is activated, increasing the heating rate and heating the slurry to reduce its viscosity, further enhancing the sedimentation of the grit. The sand produced by the initial sedimentation in the tank 2 enters the lower sand collection box 7 through the sand discharge valve 6 at the bottom 3 of the tank. The heavy phase of the sediment is discharged by the sand discharge screw pump 9, and the liquid phase overflows through the overflow port 8 into the slurry transfer tank, thereby further removing the liquid and solid grit.
[0023] During the subsequent operation, when the liquid level reaches 80%, the liquid level meter controls the feed port 21 to stop feeding, and when the liquid level reaches 40%, the liquid level meter controls the feed port 21 to reopen; when the temperature reaches 80°C, the steam inlet 23 stops spraying steam, and when the outlet liquid temperature reaches 40°C, the steam inlet 23 restarts spraying steam.
Claims
1. A mixed slurry desanding device, comprising a sand settling tank, the sand settling tank comprising a cylindrical tank body and a conical tank bottom, the tank body being provided with a liquid level gauge, a feed port being provided at the top of one side of the tank body, and a discharge port being provided at the middle of the other side of the tank body, characterized in that: The feed into the feed port is tangential feeding; a steam inlet is provided on the top surface of the tank body, and an inclined baffle is connected to the inner wall of the tank body, and the baffle is located in front of the discharge port, and the height of the top end of the baffle is higher than the height of the bottom end of the feed port, and the height of the bottom end of the baffle is lower than the height of the bottom end of the discharge port; the bottom of the tank bottom is connected to the sand collecting box through a sand discharge valve.
2. A mixed slurry sand removal device according to claim 1, characterized in that: The feed port is tangentially connected to the side wall of the tank body.
3. A mixed slurry desanding device according to claim 1 or 2, characterized in that: The baffle is trapezoidal.
4. A mixed slurry desanding device according to claim 3, characterized in that: The included angle between the baffle and the horizontal plane is 60°.
5. The mixed slurry desanding device according to claim 4, characterized in that: The baffle is welded to the inner wall of the tank by angle steel.
6. A mixed slurry sand removal device according to claim 1 or 2, characterized in that: An overflow port is provided on the upper portion of the sand collecting box.
7. The mixed slurry desanding device according to claim 6, characterized in that: The sand collecting box is provided with a sand discharge spiral pump.
8. The mixed slurry sand removal device according to claim 7, characterized in that: The sand discharge spiral pump is arranged obliquely, the inlet of the sand discharge spiral pump is arranged at the bottom of the sand collecting box, and the outlet is connected to the outside.
9. A mixed slurry sand removal device according to claim 1 or 2, characterized in that: The tank body is provided with a heating device.
10. A mixed slurry sand removal device according to claim 1 or 2, characterized in that: The discharge port is provided with a temperature sensor.