Horizontal reverse rotation basket type solid-liquid phase separation spin dryer and spin-drying method thereof
By using a horizontally counter-rotating basket-type solid-liquid phase separation dryer, a differential gear drives the screen basket and agitator shaft to achieve material feeding without breakage and self-cleaning. This solves the problems of material breakage and accumulation in vertical dryers, and improves separation efficiency and the continuous working capacity of the equipment.
Patent Information
- Application Number
- CN202511886333.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-02-17
AI Technical Summary
Existing vertical centrifuges suffer from material breakage and solid accumulation issues in drilling waste treatment, affecting separation efficiency and equipment processing efficiency.
The horizontal counter-rotating basket-type solid-liquid phase separation dryer adopts a differential gear to drive the screen basket and stirring shaft at different speeds. The material enters from the small end and exits from the large end. Combined with the scraper to remove the solid phase, it prevents siltation and achieves self-cleaning.
It improves separation efficiency, avoids solid phase accumulation, and ensures continuous operation of the centrifuge without the need for shutdown for cleaning.
Smart Images
Figure CN121534443A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a horizontal counter-rotating basket-type solid-liquid phase separation dryer and its drying method, used for the treatment of drilling waste. Background Technology
[0002] In the process of drilling waste treatment, with the continuous upgrading and changes in the industry, solid-liquid separation of waste is a crucial step. The centrifuge is an important piece of equipment for achieving efficient solid-liquid separation, and its performance directly affects the separation efficiency. Currently, vertical centrifuges are commonly used in waste treatment. Vertical centrifuges have their feed inlet at the top and require a spiral-climbing conveyor for material transport. This process leads to continuous crushing of waste rock cuttings, affecting solid-liquid separation efficiency. Furthermore, the solid phase tends to accumulate in the centrifuge's base cavity after separation, requiring regular cleaning and reducing the equipment's processing efficiency. Summary of the Invention
[0003] To address the aforementioned problems, the present invention aims to provide a horizontal reverse rotating basket-type solid-liquid phase separation dryer and its drying method for the treatment of drilling waste. It is a horizontal reverse basket-type dryer with a horizontal central spiral for feeding materials without crushing, a small end of the screen basket as the driving end, and the ability to self-clean and separate the solid phase to prevent solid phase accumulation.
[0004] To achieve the above objectives, the solution of the present invention is as follows: A horizontal counter-rotating basket-type solid-liquid phase separation dryer includes a storage tank, a support frame at the upper end of the storage tank, and a closed box with one open end within the support frame via a partition plate. The lower end of the closed box is connected to the storage tank. A horizontal solid-liquid separation device is fixedly installed within the support frame via a partition plate. A solid phase collection box is connected to the open end of the closed box on the outside of the support frame. The auger of a horizontal auger conveyor passes through the solid phase collection box and the open end of the closed box, and connects to the solid-liquid phase receiving and stirring box at the front end of the solid-liquid separation device. The solid-liquid separation device is equipped with a stirring drive shaft, and the solid-liquid phase receiving and stirring box is connected to the stirring drive shaft. The solid-liquid phase receiving and stirring box is hollow at the top and bottom. A sieve basket is also provided at the front end of the solid-liquid separation device, covering the solid-liquid phase receiving and stirring box. The sieve basket includes a flange ring. The separation device is also equipped with a sieve basket drive shaft. The flange ring is connected and fixed to the sieve basket drive shaft. A driver drives the agitation drive shaft and the sieve basket drive shaft to rotate. Multiple solid phase screening knives are evenly distributed around the flat end face of the flange ring. The multiple solid phase screening knives cover the solid-liquid phase receiving agitation box and the sieve basket drive shaft, and are arranged in a funnel shape with an angle to the axial direction. The front end face of the solid phase screening knives is flush with the opening end face of the closed box. The horizontal auger conveyor is equipped with a solid-liquid phase input interface. The horizontal auger conveyor sends the solid-liquid phase received from the solid-liquid phase input interface into the solid-liquid phase receiving agitation box. The solid phase screening knives driven by the sieve basket drive shaft rotate and roll up the solid-liquid phase flowing out of the solid-liquid phase receiving agitation box. During the rolling process, the rotating solid phase screening knives throw the solid phase in the solid-liquid phase into the solid phase collection box, and the liquid phase in the solid-liquid phase falls into the storage tank.
[0005] A further aspect of the solution is that the rotational speed of the agitation drive shaft is lower than that of the sieve basket drive shaft.
[0006] A further aspect of the solution is as follows: the driver is a differential, which has a first rotating shaft and a second rotating shaft with co-located outputs. The output of the first rotating shaft is connected to the agitation drive shaft, and the output of the second rotating shaft is connected to the sieve basket drive shaft. The input shaft of the differential is driven to rotate by a motor. The sieve basket drive shaft is a hollow shaft, which is horizontally arranged with the agitation drive shaft via bearings. An agitation wheel is set in the solid-liquid phase receiving agitation box. The agitation wheel faces the auger output port of the horizontal auger conveyor and is connected to the agitation drive shaft. Agitation teeth are set on the agitation wheel.
[0007] A further aspect of the solution is that a scraper blade is provided on the outside of the solid-liquid phase receiving and stirring box at a certain angle to the axial direction of the stirring drive shaft. The scraper blade is positioned opposite to the solid phase screening blade to scrape off the solid phase adhering to the solid phase screening blade.
[0008] A further aspect of the solution is as follows: the scraper blade includes a main scraper blade and an auxiliary scraper blade, which are arranged at intervals relative to each other. A row of floating scraper blades is arranged between the main scraper blade and the auxiliary scraper blades. The row of floating scraper blades is positioned in a floating scraper blade box. A female slot is provided in the longitudinal direction of the main scraper blade or the auxiliary scraper blade, and the floating scraper blade box is provided with a corresponding male slot. The floating scraper blade box is positioned on the main scraper blade or the auxiliary scraper blade by inserting the male slot into the female slot. When the solid-liquid phase receiving and stirring box rotates, the female slot restricts the floating scraper blade box from disengaging laterally along the main scraper blade or the auxiliary scraper blade.
[0009] A further aspect of the solution is that a conical receiving basket is provided in the solid-liquid phase receiving and stirring box, with the larger end of the conical receiving basket covering the stirring wheel, and the smaller end of the conical receiving basket connected to the output port of the horizontal auger conveyor.
[0010] A further aspect of the solution is as follows: a rotating shaft sleeve is provided around the auger of the horizontal auger conveyor passing through the solid phase collection box. A solid phase scraper is arranged around the rotating shaft sleeve, and a scraper wheel is also provided on the rotating shaft sleeve, covering the solid phase scraper. A drive device driven by a motor is provided on the side wall of the solid phase collection box. The drive device is connected to the rotating shaft sleeve to drive the scraper wheel and the solid phase scraper to rotate around the auger to scrape off the solid phase adhering to the side wall of the solid phase collection box. A solid phase outlet is provided at the bottom end of the solid phase collection box.
[0011] A further aspect of the solution is that the included angle between the solid phase screening blade and the axial direction of the screen basket drive shaft is 30 to 40 degrees.
[0012] A further aspect of the solution is that the flange ring of the sieve basket is fixed on the sieve basket connecting plate, and the sieve basket connecting plate is connected and fixed to the sieve basket drive shaft.
[0013] A method for drying based on the above-mentioned separation dryer involves monitoring the liquid content of the solid phase discharged from the solid phase collection box, adjusting the rotation speed of the screen basket drive shaft according to the liquid content of the solid phase, so that the liquid content of the solid phase fluctuates within a certain range above and below a preset value, increasing the rotation speed of the screen basket drive shaft when the liquid content of the solid phase exceeds the range, and decreasing the rotation speed of the screen basket drive shaft when the liquid content of the solid phase exceeds the range.
[0014] The beneficial effects of this invention are as follows: By introducing a differential gear to drive the screen basket drive shaft and the agitator drive shaft to rotate, the separation efficiency is improved. The material enters the solid-liquid phase receiving agitator box from the outside and is then conveyed into the screen basket. The liquid phase enters the storage tank through the screen basket, and the solid phase is scraped off by the scraper blades on the solid-liquid phase receiving agitator box and discharged into the solid phase collection shell through the solid phase screening knife of the screen basket. After entering the solid phase collection shell, the solid phase is scraped off by the solid phase scraper and rotating scraper wheel inside the solid phase collection shell. The solid phase adhering to the inner wall of the solid phase collection shell is scraped off. These solid phases automatically fall down and are discharged from the discharge port of the solid phase collection shell, thereby ensuring that the centrifuge can work continuously without stopping to clean the solid phase.
[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure, including the front-end sieve basket and the agitator box. Figure 1 Enlarged view of part A; Figure 3 This is a side view of the sieve basket; Figure 4 This is a schematic diagram of the solid-liquid phase receiving and stirring box structure; Figure 5 This is a schematic diagram of the scraper blade structure of the solid-liquid phase receiving agitator box. Figure 4 Enlarged view of part B. Detailed Implementation
[0017] Example 1: A horizontal counter-rotating basket-type solid-liquid phase separation dryer, such as Figures 1 to 4As shown, the spin dryer includes a liquid storage tank 1, a support frame 2 at the upper end of the liquid storage tank 1, and a closed box 203 with a side opening 202 provided in the support frame through a partition plate 201. The lower end of the closed box 203 is connected to the liquid storage tank 1. A horizontal solid-liquid separation device 3 is fixedly installed in the support frame 1 through two partition plates 201. A solid phase collection tank 4 is provided on the outside of the support frame 1 and connected to the end face of the closed box opening 202. The auger drum 501 of a horizontal auger conveyor 5 passes through the solid phase collection tank 4 and the end face of the closed box opening 202 and enters the closed box 203 to agitate the solid and liquid phase receiving device 3 at the front end. The solid-liquid separation device 3 is connected to a box 301 (or screw unloader). An agitator drive shaft 302 is provided, and the solid-liquid phase receiving agitator box 301 is connected to the agitator drive shaft 302. The solid-liquid phase receiving agitator box 301 is hollow at the top and bottom. A screen basket 303 is also provided covering the solid-liquid phase receiving agitator box 301 at the front end of the solid-liquid separation device 3. The screen basket includes a flange ring 303-1. The solid-liquid separation device 1 is also provided with a screen basket drive shaft 304. The flange ring 303-1 is connected and fixed to the screen basket drive shaft 304. A driver 305 drives the agitator drive shaft 302 and the screen basket drive shaft 304 to rotate, evenly distributing the liquid around the flat end face of the flange ring 303-1. The conveyor belt is equipped with multiple solid phase sieving blades 303-2. These blades cover the solid-liquid phase receiving and stirring box 301 and the sieve basket drive shaft 304, forming a conical, trumpet-shaped arrangement with an outward angle between them. The spacing between the multiple solid phase sieving blades 303-2 is 10 to 30 mm, and the angle between the solid phase sieving blades 303-2 and the sieve basket drive shaft 304 is 30 to 40 degrees. The front end face of the solid phase sieving blades 303-2 is flush with the end face of the closed box opening 202. As the solid phase rotates between two solid phase sieving blades 303-2, it is thrown into the solid phase collection box 4 along the blades. The horizontal auger conveyor 5 is equipped with a solid-liquid phase input interface. 502. The horizontal auger conveyor 5 receives the solid-liquid phase from the solid-liquid phase input interface 502 and feeds it into the solid-liquid phase receiving and stirring box 301. The solid phase screening blade 303-2, driven by the screen basket drive shaft 304, rolls up the solid-liquid phase flowing out of the solid-liquid phase receiving and stirring box 301. During the rolling process, the rotating solid phase screening blade 303-2 throws the solid phase in the solid-liquid phase into the solid phase collection box 4, and the liquid phase in the solid-liquid phase falls into the liquid storage tank 1. The reverse direction mentioned in the title is compared with the traditional vertical solid-liquid phase separation and drying machine, changing the traditional solid-liquid phase from entering from the large end of the screen basket and exiting from the small end to the solid phase entering from the small end of the screen basket and exiting from the large end. Wherein: the rotation speed of the stirring drive shaft is lower than the rotation speed of the screen basket drive shaft.
[0018] In this embodiment: the driver 305 is a differential, which has a first rotating shaft 305-1 and a second rotating shaft 305-2 with co-located outputs. The output of the first rotating shaft 305-1 is connected to the agitation drive shaft 302, and the output of the second rotating shaft 305-2 is connected to the sieve basket drive shaft 304 through a connecting sleeve 304-1. The input shaft 305-3 of the differential is driven to rotate by the motor 6 via a belt. The sieve basket drive shaft 304 is a hollow shaft, which is horizontally arranged with the agitation drive shaft 302 through a bearing 306. An agitation wheel 301-1 is provided in the solid-liquid phase receiving agitation box 301. The agitation wheel 301-1 faces the output port of the auger 501 of the horizontal auger conveyor 5 and is connected to the agitation drive shaft 302 through a backrest wheel 301-2. Agitation teeth 301-3 are provided on the agitation wheel. In this embodiment, the differential ratio between the sieve basket drive shaft and the agitation drive shaft is 60 to 1.
[0019] A scraper blade 301-4 is provided on the outside of the solid-liquid phase receiving and stirring box 301 at a certain angle to the axial direction of the stirring drive shaft 302. The scraper blade 301-4 is positioned opposite to the solid phase screening blade 303-2 and is used to scrape off the solid phase adhering to the solid phase screening blade 303-2. To improve agitation efficiency, a conical receiving basket 301-5 is provided in the solid-liquid phase receiving and agitating box 301. The large end of the conical receiving basket 301-5 covers the agitating wheel 301-1, and the small end of the conical receiving basket 301-5 is connected to the output port of the auger 501 of the horizontal auger conveyor 5.
[0020] In this embodiment: The horizontal auger conveyor passing through the solid phase collection box 4 is provided with a rotating bushing 401. A solid phase scraper 402 is arranged around the rotating bushing 401. A scraper wheel 403 is also provided on the rotating bushing 401. The scraper wheel 403 holds the solid phase scraper 402. A drive device 404 driven by a motor is provided on the side wall of the solid phase collection box. The drive device 404 is connected to the rotating bushing 401 to drive the scraper wheel 403 and the solid phase scraper 402 to rotate around the auger to scrape off the solid phase adhering to the side wall of the solid phase collection box 4. A solid phase outlet 405 is provided at the bottom end of the solid phase collection box 4.
[0021] Wherein: the flange ring 303-1 of the sieve basket is fixed on the sieve basket connecting plate 303-1-1, and the flange ring 303-1 is connected and fixed to the sieve basket drive shaft through the sieve basket connecting plate 303-1-1.
[0022] Among them, such as Figure 4 and Figure 5As shown, the scraper blades 301-4 on the outside of the solid-liquid phase receiving and stirring box 301 include a main scraper blade 301-4-1 and a secondary scraper blade 301-4-2. The main scraper blades 301-4-1 and the secondary scraper blades 301-4-2 are arranged at intervals relative to each other. A row of floating scraper blades 301-4-3 is arranged between the main scraper blades 301-4-1 and the secondary scraper blades 301-4-2. The row of floating scraper blades 301-4-3 is positioned in a floating scraper blade box 301-4-4. In this embodiment, the main scraper blade 301-4-1... A female slot 301-4-5 is provided longitudinally, or a female slot 301-4-5 can be provided longitudinally on the secondary scraper blade 301-4-2. The floating scraper box 301-4-4 is provided with a corresponding female slot 301-4-6. The floating scraper box 301-4-4 is positioned on the main scraper blade or the secondary scraper blade by inserting the female slot into the female slot. When the solid-liquid phase receiving and stirring box 301 rotates, the female and male slots restrict the floating scraper box 301-4-4 from laterally disengaging along the main scraper blade or the secondary scraper blade.
[0023] During operation, the centrifuge drives the sieve basket 303 and the solid-liquid phase receiving and stirring box 301 to rotate coaxially at different speeds. The material to be separated enters the solid-liquid phase receiving and stirring box 301 from the feed inlet and is driven to rotate by the solid-liquid phase receiving and stirring box 301. The accelerated material is thrown out from the floating scraper 301-4-3 of the solid-liquid phase receiving and stirring box 301 and then sticks to the solid phase screening knife 303-2 of the sieve basket. Under the centrifugal force, the solids in the material pass through the gap of the solid phase screening knife 303-2 of the sieve basket and are thrown out. Some solids will remain on the inner surface of the solid phase screening knife 303-2. The main blades of the solid-liquid phase receiving and stirring box 301 scrape off most of the remaining solids on the solid phase screening knife 303-2 of the sieve basket. After the solids are scraped off, they continue to be discharged along the inner conical surface of the solid phase screening knife 303-2 of the sieve basket. Because of the gap between the main blades and the solid phase screening blades, a thin layer of solid always remains on the inner surface of the solid phase screening blades. This solid layer can cause obstruction and reduce separation efficiency. Under the centrifugal force of the centrifuge's rotation, the floating scraper 301-4-3 is thrown out and rotates close to the inner surface of the solid phase screening blades in the screen basket, scraping away all the residual solids and ensuring that the gaps between the solid phase screening blades in the screen basket are unobstructed, thereby ensuring separation efficiency.
[0024] The differential used in this embodiment is a planetary gear reducer of model 2K-H, which is a technologically mature device. Unlike the differential used in automobiles, the two output shafts are in the same direction. In this embodiment, the differential ratio between the sieve drive shaft 304 and the agitation drive shaft 302 is 60 to 1.
[0025] Example 2: A method for drying based on the centrifugal dryer described in Example 1, wherein the content of Example 1 is applicable to this example, involves monitoring the liquid content of the solid phase discharged from the solid phase collection box, adjusting the rotation speed of the screen basket drive shaft according to the liquid content, so that the liquid content of the solid phase fluctuates within a certain range above and below a preset value, increasing the rotation speed of the screen basket drive shaft when the liquid content of the solid phase exceeds the range, and decreasing the rotation speed of the screen basket drive shaft when the liquid content of the solid phase exceeds the range, and vice versa. Monitoring can be performed by setting up sensors or by manual monitoring. The preset range of the liquid content of the solid phase is usually set between 3% and 5%.
Claims
1. A horizontal reverse-rotation basket-type solid-liquid separation spin dryer comprising a liquid storage tank, characterized in that, The support frame is provided with a closed box body with one side end opening through the partition plate in the support frame, the lower end of the closed box body is communicated with the liquid storage tank, a horizontal solid-liquid separation device is fixedly arranged in the support frame through the partition plate, a solid phase collection tank is arranged outside the support frame and connected with the opening end of the closed box body, the winding cage cylinder of one horizontal winding cage conveyor passes through the solid phase collection tank and the opening end of the closed box body, enters the closed box body and is connected with the solid-liquid phase receiving stirring box arranged at the front end of the solid-liquid separation device, the solid-liquid separation device is provided with an agitation driving shaft, the solid-liquid phase receiving stirring box is connected with the agitation driving shaft, the solid-liquid phase receiving stirring box is hollow up and down, the solid-liquid phase receiving stirring box is further provided with a sieve basket which is covered by the solid-liquid separation device at the front end, the sieve basket comprises a flange ring, the solid-liquid separation device is further provided with a sieve basket driving shaft, the flange ring is fixedly connected with the sieve basket driving shaft, one driver drives the agitation driving shaft and the sieve basket driving shaft to rotate, a plurality of solid phase screen knives are uniformly arranged around the plane end face of the flange ring, the solid phase screen knives are arranged in a horn shape outwardly with an included angle in the axial direction of the sieve basket driving shaft which covers the solid-liquid phase receiving stirring box, the front end face of the solid phase screen knife is flush with the opening end face of the closed box body, the horizontal winding cage conveyor is provided with a solid-liquid phase input interface, the horizontal winding cage conveyor sends the solid-liquid phase received from the solid-liquid phase input interface into the solid-liquid phase receiving stirring box, the solid phase screen knives driven by the sieve basket driving shaft to rotate roll up the solid-liquid phase flowing out of the solid-liquid phase receiving stirring box, in the rolling process, the solid phase in the solid-liquid phase is thrown into the solid phase collection tank through the rotating solid phase screen knives, and the liquid phase in the solid-liquid phase falls into the liquid storage tank.
2. The solid-liquid phase separation spin-dryer according to claim 1, characterized by, The rotation speed of the agitation driving shaft is lower than that of the sieve basket driving shaft.
3. The solid-liquid phase separation spin-dryer according to claim 1 or 2, characterized in that, The driver is a differential mechanism, the differential mechanism has a first rotating shaft and a second rotating shaft which are coaxially sleeved and output, the first rotating shaft is connected with the agitation driving shaft, the second rotating shaft is connected with the sieve basket driving shaft, the input shaft of the differential mechanism is driven to rotate by a motor, the sieve basket driving shaft is a hollow shaft, the hollow shaft and the agitation driving shaft are horizontally arranged through bearings, an agitation wheel disc is arranged in the solid-liquid phase receiving stirring box, the agitation wheel disc is connected with the agitation driving shaft and faces the winding cage output port of the horizontal winding cage conveyor, and an agitation tooth piece is arranged on the agitation wheel disc.
4. The solid-liquid phase separation spin-dryer according to claim 3, characterized in that, A scraper blade is arranged outside the solid-liquid phase receiving stirring box and outwardly at a certain angle with the axial direction of the agitation driving shaft, the scraper blade is arranged opposite to the solid phase screen knife and is used for scraping the solid phase adhered on the solid phase screen knife.
5. The solid-liquid phase separation spin-dryer according to claim 4, wherein, The scraper blade comprises a main scraper blade and a secondary scraper blade, the main scraper blade and the secondary scraper blade are arranged opposite and spaced apart, a row of floating scraper blades is arranged between the main scraper blade and the secondary scraper blade, the row of floating scraper blades is positioned in a floating scraper blade box, a clamping groove female port is arranged on the main scraper blade or the secondary scraper blade in the longitudinal direction, the floating scraper blade box is provided with a corresponding clamping groove male port, the floating scraper blade box is positioned on the main scraper blade or the secondary scraper blade by being inserted into the clamping groove female port through the clamping groove male port, and when the solid-liquid phase receiving stirring box rotates, the clamping groove male and female ports limit the floating blade box to be separated from the main scraper blade or the secondary scraper blade in the transverse direction.
6. The solid-liquid phase separation spin-dryer according to claim 3, wherein The solid-liquid phase receiving stirring box is provided with a conical receiving blue, the large head side of the conical receiving blue covers the stirring wheel disc, and the small head side of the conical receiving blue is connected with the cage output port of the horizontal cage conveyor.
7. The solid-liquid phase separation spin-dryer according to claim 1, wherein The cage cylinder of the horizontal cage conveyor which passes through the solid phase collecting box is provided with a rotating shaft sleeve, the solid phase scraper is arranged around the rotating shaft sleeve, the rotating shaft sleeve is further provided with a scraping wheel which covers the solid phase scraper, the driving device driven by the motor is arranged on the side wall of the solid phase collecting box, the driving device is connected with the rotating shaft sleeve to drive the scraping wheel and the solid phase scraper to rotate around the cage cylinder to scrape off the solid phase adhered to the side wall of the solid phase collecting box, and the solid phase outlet is arranged at the bottom end of the solid phase collecting box.
8. The solid-liquid phase separation spin-dryer according to claim 1, wherein, The included angle between the solid phase scraping knife and the axial direction of the screen basket driving shaft is 30-40 degrees.
9. The solid-liquid phase separation spin-dryer according to claim 1, wherein, The flange ring of the screen basket is fixed on the screen basket connecting disc, and the screen basket connecting disc is connected and fixed with the screen basket driving shaft.
10. A spin-drying method based on the spin-dryer according to any one of the preceding claims, characterized in that, The solid phase liquid content rate in the solid phase collecting box is monitored, the rotating speed of the screen basket driving shaft is adjusted according to the solid phase liquid content rate, the solid phase liquid content rate is floated within a certain range above and below the preset value, when the solid phase liquid content rate exceeds the range upwards, the rotating speed of the screen basket driving shaft is increased, and vice versa.