Coal slurry pretreatment equipment

Abstract

The invention relates to coal slurry pretreatment equipment, and relates to the technical field of coal slurry pretreatment, the coal slurry pretreatment equipment comprises a stirring tank, a stirring assembly, an interval dosing assembly and an airflow disturbance assembly; the stirring tank is vertically arranged, and the bottom of the stirring tank is necked; the top end of the stirring tank is communicated with a feeding pipe, one side of the feeding pipe is provided with a dosing pipe, one end of the dosing pipe is communicated with the interior of the stirring tank, the bottom of the stirring tank is communicated with a discharging pipe, and a butterfly valve is mounted on the discharging pipe; the stirring assembly is positioned on the stirring tank and is used for uniformly stirring the flotation reagent and the coal slurry in the stirring tank; the interval dosing assembly is located in the stirring tank and used for driving flotation reagents to be added into the stirring tank at intervals. The airflow disturbance assembly is located at the bottom of the stirring tank and used for driving airflow to blow coal slurry deposited at the bottom of the stirring tank. The device has the effect that the coal slurry and the flotation reagent are easily and uniformly mixed.

Description

Technical Field

[0001] This application relates to the technical field of coal slurry pretreatment, and in particular to a coal slurry pretreatment device. Background Technology

[0002] Coal slurry pretreatment equipment is a special equipment used in the coal flotation upgrading process to pretreat raw coal slurry. By adding flotation reagents to the coal slurry and mixing the two, the coal quality and impurities are easily separated in subsequent flotation operations. Currently, existing coal slurry pretreatment equipment typically includes a pretreatment tank, a stirring assembly, a reagent addition module, a feed pipe, and a discharge pipe. During use, operators transport the raw coal slurry to be treated into the pretreatment tank through the feed pipe. The operators then control the reagent addition module to inject flotation reagents into the coal slurry in the tank according to the set dosage. Subsequently, the stirring assembly is started to stir the mixture of coal slurry and flotation reagents. After stirring is completed, the pretreated coal slurry is transported to the subsequent flotation equipment through the discharge pipe, completing the coal slurry pretreatment process. When using existing coal slurry pretreatment equipment, the stirring range of the stirring component only covers the middle area of ​​the pretreatment tank, and the flotation reagent is directly injected into the coal slurry through a single addition port. Because the coal slurry itself has a certain viscosity, the reagent is prone to agglomerate in local areas of the coal slurry, making it difficult for the coal slurry and flotation reagent to mix evenly, which affects the separation efficiency of coal quality and impurities in subsequent flotation operations. Summary of the Invention

[0003] In order to facilitate the uniform mixing of coal slurry and flotation reagents, this application provides a coal slurry pretreatment device.

[0004] This application provides a coal slurry pretreatment device, which adopts the following technical solution: A coal slurry pretreatment device includes a mixing tank, a mixing assembly, an intermittent dosing assembly, and an airflow disturbance assembly. The mixing tank is vertically arranged and has a constricted bottom. A feed pipe is connected to the top of the mixing tank, and a dosing pipe is provided on one side of the feed pipe. One end of the dosing pipe is connected to the interior of the mixing tank. A discharge pipe is connected to the bottom of the mixing tank, and a butterfly valve is installed on the discharge pipe. The mixing assembly is located on the mixing tank and is used to mix the flotation reagent and coal slurry in the mixing tank evenly. The intermittent dosing assembly is located inside the mixing tank and is used to drive the flotation reagent to be added intermittently into the mixing tank. The airflow disturbance assembly is located at the bottom of the mixing tank and is used to drive airflow to blow the coal slurry deposited at the bottom of the mixing tank.

[0005] By adopting the above technical solution, during use, the operator delivers the raw coal slurry to be pretreated into the mixing tank through the feed pipe, and simultaneously connects the flotation reagent to the dosing pipe. When the coal slurry injection volume reaches the preset liquid level in the mixing tank, the operator starts the stirring assembly to begin stirring the coal slurry in the mixing tank. At the same time, the interval dosing assembly starts synchronously, quantitatively and in batches delivering the flotation reagent in the dosing pipe into the coal slurry in the mixing tank according to the preset interval time and single dosing amount. During the stirring and dosing process, the airflow disturbance assembly delivers airflow to the bottom area of ​​the mixing tank, making it difficult for the coal slurry to settle at the bottom of the mixing tank. After the coal slurry and flotation reagent are mixed evenly, the operator opens the butterfly valve on the discharge pipe, and the pretreated coal slurry is delivered to the subsequent flotation equipment through the discharge pipe. By setting up the stirring assembly and the interval dosing assembly, the coal slurry and flotation reagent are easily mixed evenly.

[0006] Optionally, the stirring assembly includes a first stirring section and a second stirring section; the first stirring section is located on the stirring tank and is used to stir the coal slurry in the stirring tank circumferentially; the second stirring section is located inside the stirring tank and is used to stir the coal slurry in the stirring tank vertically.

[0007] By adopting the above technical solution, during use, the first stirring part applies a circumferential driving force to the coal slurry in the stirring tank, causing the coal slurry to move in a circular motion along the stirring tank. At the same time, the second stirring part applies vertical stirring to the coal slurry at different heights in the stirring tank, pushing the upper layer of coal slurry downwards and turning the lower layer of deposited coal slurry upwards, so that the coal slurry is less likely to stratify due to differences in density and viscosity, thereby making it easier to mix the coal slurry and flotation reagents evenly.

[0008] Optionally, the first stirring unit includes a motor, a drive gear, a rotating shaft, a gear ring, and a rotating cylinder; the motor is mounted on the top of the stirring tank; the drive gear is fixedly mounted on the output shaft of the motor and located inside the stirring tank; the rotating shaft is rotatably mounted inside the stirring tank, and a driven gear is fixedly mounted on the rotating shaft, the driven gear meshing with the drive gear; the gear ring is horizontally mounted inside the stirring tank and meshes with the driven gear, a limit ring is fixedly mounted on the gear ring, the limit ring is embedded in the stirring tank and rotatably connected to the stirring tank; the rotating cylinder is fixedly mounted at the bottom end of the gear ring and rotatably connected to the stirring tank; a baffle is fixedly mounted on the inner wall of the rotating cylinder, the baffle is inclined and multiple baffles are spaced apart along the circumference of the rotating cylinder; a fixing plate is fixedly mounted on the feed pipe, the fixing plate is horizontally mounted on the top of the stirring tank and rotatably connected to the rotating shaft, the fixing plate abuts against the inner wall of the rotating cylinder, and one end of the dosing pipe is inserted into the fixing plate.

[0009] By adopting the above technical solution, when in use, the operator starts the motor, the output shaft of the motor drives the drive gear to rotate, the drive gear drives the driven gear to rotate, the driven gear drives the gear ring to rotate, the gear ring drives the rotating drum to rotate synchronously, and the multiple baffles on the rotating drum rotate synchronously, so that the coal slurry can easily flow around the circumference of the mixing tank, thereby making it easy to mix the coal slurry and flotation reagent evenly.

[0010] Optionally, the first stirring section further includes a side wall scraper; the side wall scraper is fixedly disposed at the bottom end of the rotating cylinder and abuts against the inner wall of the stirring tank; a bottom wall scraper is fixedly disposed at one end of the side wall scraper and abuts against the inner bottom wall of the stirring tank; two sets of the side wall scraper and the bottom wall scraper are provided and are respectively located on both sides of the rotating cylinder.

[0011] By adopting the above technical solution, when the rotating drum rotates, the rotating drum drives the side wall scraper and the bottom wall scraper to rotate synchronously. The side wall scraper scrapes off the coal slurry adhering to the inner wall of the mixing tank, and the bottom wall scraper scrapes off the coal slurry adhering to the bottom wall of the mixing tank, so that the coal slurry can be easily mixed evenly with the flotation reagent.

[0012] Optionally, the second stirring unit includes a drive rod, a limiting cylinder, a first bevel gear, a rotating rod, and a second bevel gear; the drive rod is vertically disposed inside the stirring tank and fixedly connected to the output shaft of the motor, and the drive rod is rotatably connected to the fixed plate; the limiting cylinder is fixedly disposed at the bottom end of the fixed plate and sleeved on the drive rod; the first bevel gear is fixedly disposed on the drive rod and located inside the limiting cylinder; the rotating rod is horizontally inserted into the limiting cylinder, with one end located inside the limiting cylinder, and stirring blades are fixedly disposed on the rotating rod; the second bevel gear is fixedly disposed on the rotating rod and located inside the limiting cylinder, and the second bevel gear meshes with the first bevel gear.

[0013] By adopting the above technical solution, when the operator drives the motor to work, the motor drives the drive rod to rotate, the drive rod drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the rotating rod to rotate, and the stirring blades on the rotating rod stir and mix the coal slurry at different heights, making it easy for the coal slurry to be mixed evenly with the flotation reagent.

[0014] Optionally, the first bevel gear, the rotating rod, the stirring blade, and the second bevel gear are arranged in multiple sets at intervals along the vertical direction; each set of the rotating rod, the stirring blade, and the second bevel gear has two sets, which are respectively located on both sides of the limiting cylinder.

[0015] By adopting the above technical solution, during use, the stirring blades on multiple sets of rotating rods will mix the coal slurry at different heights in the mixing tank evenly, making it less likely for the coal slurry to separate due to differences in density and viscosity.

[0016] Optionally, the interval dosing assembly includes a collection box and a support plate; the collection box is rotatably disposed at the bottom end of the fixed plate and coaxially disposed with the limiting cylinder, and the dosing tube passes through the fixed plate and communicates with the interior of the collection box; a first connecting hole is provided at the bottom of the collection box, and a connecting rod is fixedly disposed on one side of the collection box, one end of the connecting rod being fixedly connected to the inner wall of the rotating cylinder; the support plate is fixedly sleeved on the limiting cylinder and located inside the collection box, and a second connecting hole is provided on the support plate.

[0017] By adopting the above technical solution, when the rotating drum rotates, the rotating drum drives the collecting box to rotate synchronously through the connecting rod; when the first connecting hole on the collecting box is aligned with the second connecting hole on the support plate, the flotation reagent in the collecting box falls into the coal slurry in the mixing tank through the channel formed by the first connecting hole and the second connecting hole, realizing single addition of reagent; when the first connecting hole rotates to be misaligned with the second connecting hole, the reagent delivery channel is closed and the addition of reagent stops; as the collecting box continues to rotate, the first connecting hole and the second connecting hole periodically align and misalign, realizing the interval quantitative addition of flotation reagent.

[0018] Optionally, the airflow disturbance assembly includes a synchronizing rod, a driving telescopic rod, an air blowing pipe, and a reset pipe; the synchronizing rod is vertically arranged and inserted into the mixing tank, and is fixedly connected to the driving rod; a cam is fixedly arranged at one end of the synchronizing rod, and the cam is located at the bottom end of the mixing tank; the driving telescopic rod is horizontally arranged, and its fixed end is fixedly arranged at the bottom end of the mixing tank, and the rodless cavity of the driving telescopic rod is filled with air; a push plate is fixedly arranged on the movable end of the driving telescopic rod, and the push plate abuts against the cam; a spring is arranged in the rodless cavity of the driving telescopic rod, and the two ends of the spring are fixedly connected to the movable end and the fixed end of the driving telescopic rod, respectively; the two ends of the air blowing pipe are respectively connected to the rodless cavity of the driving telescopic rod and the interior of the mixing tank, and a first one-way valve is installed on the air blowing pipe; one end of the reset pipe is connected to the rodless cavity of the driving telescopic rod, and the other end is connected to the outside, and a second one-way valve is installed on the reset pipe.

[0019] By adopting the above technical solution, when the drive rod rotates, it drives the synchronizing rod to rotate synchronously, and the synchronizing rod drives the cam to rotate synchronously. When the cam rotates, the convex part of the cam squeezes the push plate, and the push plate squeezes the movable end of the drive telescopic rod. The volume of the rodless cavity of the drive telescopic rod decreases, and the spring is in a compressed state. The air in the rodless cavity of the drive telescopic rod is transported to the mixing tank through the air blowing pipe and the first one-way valve. The airflow blows the deposited coal slurry from the bottom of the tank upward. When the convex part of the cam disengages from the push plate, the spring returns to its original position, and the movable end of the drive telescopic rod and the push plate return to their original positions. A negative pressure is formed in the rodless cavity of the drive telescopic rod, and outside air flows into the rodless cavity of the drive telescopic rod through the reset pipe and the second one-way valve to replenish the air for the next air blowing. As the drive rod continues to rotate, the cam periodically pushes the push plate, and the rodless cavity of the drive telescopic rod cycles through the air blowing and air intake actions, realizing the continuous delivery of periodic airflow into the mixing tank.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a stirring component and an intermittent dosing component, the coal slurry and flotation reagents can be easily and evenly mixed; 2. By setting up an airflow disturbance component, coal slurry is less likely to accumulate at the bottom of the mixing tank, thus making it easier to mix the coal slurry and flotation reagents evenly. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a cross-sectional view of an embodiment of this application; Figure 3 This is a cross-sectional view of an embodiment of this application for showing the drive gear; Figure 4 This is a cross-sectional view of the air blowing pipe according to an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Mixing tank; 11. Feed pipe; 111. Fixed plate; 12. Dosing pipe; 13. Discharge pipe; 131. Butterfly valve; 14. Frame; 2. Mixing assembly; 21. First mixing section; 211. Motor; 212. Drive gear; 213. Rotating shaft; 2131. Driven gear; 214. Gear ring; 2141. Limiting ring; 215. Rotating cylinder; 2151. Baffle plate; 216. Side wall scraper; 2161. Bottom wall scraper; 22. Second mixing section; 221. Drive rod; 2 22. Limiting cylinder; 223. First bevel gear; 224. Rotating rod; 2241. Stirring blade; 225. Second bevel gear; 3. Interval dosing assembly; 31. Collection box; 311. First connecting hole; 312. Connecting rod; 32. Support plate; 321. Second connecting hole; 4. Airflow disturbance assembly; 41. Synchronizing rod; 411. Cam; 42. Drive telescopic rod; 421. Push plate; 422. Spring; 43. Air blowing pipe; 431. First one-way valve; 44. Reset pipe; 441. Second one-way valve. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0024] This application discloses a coal slurry pretreatment device. (Refer to...) Figure 1 and Figure 2 A coal slurry pretreatment device includes a mixing tank 1, a stirring assembly 2, an intermittent dosing assembly 3, and an airflow disturbance assembly 4. The mixing tank 1 is vertically arranged and has a constricted bottom. The stirring assembly 2 is located on the mixing tank 1 and is used to uniformly stir the flotation reagents and coal slurry within the mixing tank 1. The intermittent dosing assembly 3 is located inside the mixing tank 1 and is used to intermittently add flotation reagents into the mixing tank 1. The airflow disturbance assembly 4 is located at the bottom of the mixing tank 1 and is used to drive airflow to agitate the coal slurry deposited at the bottom of the mixing tank 1.

[0025] When in use, the operator starts the stirring component 2, which stirs the coal slurry in the stirring tank 1. At the same time, the interval dosing component 3 is started synchronously. According to the preset interval time and single dosing amount, the flotation reagent in the dosing pipe 12 is quantitatively and repeatedly delivered to the coal slurry in the stirring tank 1. During the stirring and dosing process, the airflow disturbance component 4 delivers airflow to the bottom area of ​​the stirring tank 1.

[0026] Reference Figure 1 and Figure 2The top of the mixing tank 1 is connected to a feed pipe 11, which is circular and fixedly connected to the mixing tank 1. A fixing plate 111, which is circular and horizontally positioned inside the mixing tank 1, is fixedly installed at the bottom of the feed pipe 11. A dosing pipe 12, which is circular and connected at one end to the interior of the mixing tank 1, is vertically installed on one side of the feed pipe 11. The other end of the dosing pipe 12 is inserted into the fixing plate 111. The bottom of the mixing tank 1 is connected to a discharge pipe 13, which is circular and equipped with a butterfly valve 131. A frame 14 is fixedly installed at the bottom of the mixing tank 1.

[0027] Reference Figure 1 and Figure 2 The mixing assembly 2 includes a first mixing section 21 and a second mixing section 22. The first mixing section 21 is located on the mixing tank 1 and is used to circumferentially mix the coal slurry in the mixing tank 1. The second mixing section 22 is located inside the mixing tank 1 and is used to mix the coal slurry inside the mixing tank 1 vertically.

[0028] Reference Figure 2 and Figure 3 The first stirring unit 21 includes a motor 211, a drive gear 212, a rotating shaft 213, a gear ring 214, a rotating cylinder 215, and a side wall scraper 216. The motor 211 is vertically mounted at the top of the stirring tank 1. The drive gear 212 is horizontally arranged and fixedly connected to the output shaft of the motor 211, and is located inside the stirring tank 1. The rotating shaft 213 is rotatably arranged inside the stirring tank 1 and is in the shape of a circular rod. The rotating shaft 213 is located above the fixed plate 111 and is rotatably connected to the fixed plate 111. A driven gear 2131 is fixedly arranged on the rotating shaft 213. The driven gear 2131 is horizontally arranged and meshes with the drive gear 212. The gear ring 214 is horizontally disposed inside the mixing tank 1 and meshes with the driven gear 2131. A limit ring 2141 is fixedly disposed on the gear ring 214. The limit ring 2141 is circular and embedded inside the mixing tank 1. The limit ring 2141 is rotatably connected to the mixing tank 1.

[0029] A rotating cylinder 215 is vertically mounted at the bottom end of a toothed ring 214 and is a cylindrical shape with openings at the top and bottom. The rotating cylinder 215 is fixedly connected to the toothed ring 214 and rotatably connected to the mixing tank 1. The inner wall of the rotating cylinder 215 abuts against a fixed plate 111. A baffle plate 2151 is vertically mounted on the inner wall of the rotating cylinder 215. The baffle plate 2151 is inclined and rectangular, fixedly connected to the rotating cylinder 215, and multiple baffle plates are spaced apart along the circumference of the rotating cylinder 215. A side wall scraper 216 is fixedly mounted at the bottom end of the rotating cylinder 215 and abuts against the inner wall of the mixing tank 1. A bottom wall scraper 2161 is fixedly mounted at one end of the side wall scraper 216 and abuts against the inner bottom wall of the mixing tank 1. Two sets of side wall scrapers 216 and bottom wall scrapers 2161 are provided and located on both sides of the rotating cylinder 215.

[0030] Reference Figure 2 The second stirring unit 22 includes a drive rod 221, a limiting cylinder 222, a first bevel gear 223, a rotating rod 224, and a second bevel gear 225. The drive rod 221 is vertically arranged inside the stirring tank 1 and is circular in shape. The drive rod 221 is fixedly connected to the output shaft of the motor 211 and rotatably connected to the fixed plate 111. The limiting cylinder 222 is fixedly arranged at the bottom end of the fixed plate 111 and vertically sleeved on the drive rod 221. The limiting cylinder 222 is cylindrical in shape. The first bevel gear 223 is fixedly arranged on the drive rod 221 and horizontally arranged inside the limiting cylinder 222. The rotating rod 224 is horizontally inserted into the limiting cylinder 222 and is circular in shape. One end of the rotating rod 224 is located inside the limiting cylinder 222, and at least one stirring blade 2241 is fixedly arranged on the rotating rod 224. The second bevel gear 225 is fixedly mounted on the rotating rod 224 and vertically positioned inside the limiting cylinder 222. The second bevel gear 225 meshes with the first bevel gear 223. Multiple sets of the first bevel gear 223, rotating rod 224, stirring blade 2241, and second bevel gear 225 are arranged at intervals along the vertical direction. Each set includes two sets of rotating rod 224, stirring blade 2241, and second bevel gear 225, located on opposite sides of the limiting cylinder 222.

[0031] In use, the operator starts the motor 211. The output shaft of the motor 211 drives the drive gear 212 to rotate, the drive gear 212 drives the driven gear 2131 to rotate, the driven gear 2131 drives the gear ring 214 to rotate, the gear ring 214 drives the rotating cylinder 215 to rotate synchronously, and the multiple baffles 2151 on the rotating cylinder 215 rotate synchronously. At the same time, the rotating cylinder 215 drives the side wall scraper 216 and the bottom wall scraper 2161 to rotate synchronously. The side wall scraper 216 scrapes off the coal slurry adhering to the inner wall of the mixing tank 1, and the bottom wall scraper 2161 scrapes off the coal slurry adhering to the bottom wall of the mixing tank 1.

[0032] When the operator drives the motor 211 to work, the motor 211 drives the drive rod 221 to rotate, the drive rod 221 drives the first bevel gear 223 to rotate, the first bevel gear 223 drives the second bevel gear 225 to rotate, the second bevel gear 225 drives the rotating rod 224 to rotate, and the stirring blades 2241 on the rotating rod 224 stir and mix the coal slurry at different heights.

[0033] Reference Figure 2The interval dosing assembly 3 includes a collection box 31 and a support plate 32. The collection box 31 is rotatably mounted on the bottom end of the fixed plate 111 and is circular in shape. The collection box 31 is coaxially arranged with the limiting cylinder 222, and the dosing pipe 12 passes through the fixed plate 111 and communicates with the inside of the collection box 31. A first connecting hole 311 is provided at the bottom of the collection box 31. The first connecting hole 311 is circular and has multiple holes arranged around the circumference of the collection box 31. A connecting rod 312 is fixedly mounted on one side of the collection box 31. The connecting rod 312 is horizontal and rectangular in shape. One end of the connecting rod 312 is fixedly connected to the inner wall of the rotating cylinder 215. Multiple connecting rods 312 are spaced apart around the circumference of the collection box 31. The support plate 32 is fixedly sleeved on the limiting cylinder 222 and is circular in shape. The support plate 32 is horizontally arranged inside the collection box 31. The support plate 32 is provided with a second connection hole 321. The second connection hole 321 is circular and multiple second connection holes 321 are provided around the circumference of the collection box 31, and each of them corresponds to a first connection hole 311.

[0034] When the rotating drum 215 rotates, it drives the collecting box 31 to rotate synchronously via the connecting rod 312. When the first connecting hole 311 on the collecting box 31 is aligned with the second connecting hole 321 on the support plate 32, the flotation reagent in the collecting box 31 falls into the coal slurry in the mixing tank 1 through the channel formed by the first connecting hole 311 and the second connecting hole 321, achieving single-time dosing. When the first connecting hole 311 rotates to the point where it is misaligned with the second connecting hole 321, the reagent delivery channel closes, and dosing stops.

[0035] Reference Figure 2 and Figure 4 The airflow disturbance component 4 includes a synchronizing rod 41, a drive telescopic rod 42, an air blowing pipe 43, and a reset pipe 44. The synchronizing rod 41 is vertically arranged and circular in shape. One end of the synchronizing rod 41 is inserted into the mixing tank 1 and fixedly connected to the drive rod 221. A cam 411 is fixedly mounted on the end of the synchronizing rod 41 away from the drive rod 221, and the cam 411 is horizontally positioned at the bottom of the mixing tank 1. The drive telescopic rod 42 is horizontally arranged, with its fixed end fixedly positioned at the bottom of the mixing tank 1. The rodless cavity of the drive telescopic rod 42 is filled with air. A push plate 421 is fixedly mounted on the movable end of the drive telescopic rod 42. The push plate 421 is vertically arranged and rectangular in shape, and abuts against the cam 411.

[0036] A spring 422 is horizontally installed inside the rodless cavity of the drive telescopic rod 42. The two ends of the spring 422 are fixedly connected to the movable end and the fixed end of the drive telescopic rod 42, respectively. The air blowing pipe 43 is circular, with both ends communicating with the rodless cavity of the drive telescopic rod 42 and the interior of the mixing tank 1, respectively. A first one-way valve 431 is installed on the air blowing pipe 43. The reset pipe 44 is circular, with one end communicating with the rodless cavity of the drive telescopic rod 42 and the other end communicating with the outside. A second one-way valve 441 is installed on the reset pipe 44.

[0037] When the drive rod 221 rotates, it drives the synchronizing rod 41 to rotate synchronously, and the synchronizing rod 41 drives the cam 411 to rotate synchronously. When the cam 411 rotates, the protruding part of the cam 411 presses against the push plate 421, and the push plate 421 presses against the movable end of the drive telescopic rod 42. The volume of the rodless cavity of the drive telescopic rod 42 decreases, and the spring 422 is in a compressed state. The air in the rodless cavity of the drive telescopic rod 42 is transported to the mixing tank 1 through the air blowing pipe 43 and the first one-way valve 431. The airflow blows the deposited coal slurry upward from the bottom of the tank.

[0038] When the protruding part of the cam 411 disengages from the push plate 421, the spring 422 resets, the movable end of the drive telescopic rod 42 and the push plate 421 reset, a negative pressure is formed in the rodless cavity of the drive telescopic rod 42, and outside air flows into the rodless cavity of the drive telescopic rod 42 through the reset pipe 44 and the second one-way valve 441 to replenish air for the next blowing.

[0039] The implementation principle of a coal slurry pretreatment device according to an embodiment of this application is as follows: In operation, the operator starts the motor 211, whose output shaft drives the drive gear 212 and drive rod 221 to rotate. The drive gear 212 drives the driven gear 2131 to rotate, which in turn drives the gear ring 214 to rotate. The gear ring 214 drives the rotating cylinder 215 to rotate synchronously, and multiple baffles 2151 on the rotating cylinder 215 rotate synchronously. Simultaneously, the rotating cylinder 215 drives the side wall scrapers 216 and the bottom wall scrapers 2161 to rotate synchronously. The drive rod 221 drives the first bevel gear 223 to rotate, which in turn drives the second bevel gear 225 to rotate. The second bevel gear 225 drives the rotating rod 224 to rotate, and the stirring blades 2241 on the rotating rod 224 mix the coal slurry at different heights.

[0040] When the rotating drum 215 rotates, it drives the collecting box 31 to rotate synchronously via the connecting rod 312. When the first connecting hole 311 on the collecting box 31 is aligned with the second connecting hole 321 on the support plate 32, the flotation reagent in the collecting box 31 falls into the coal slurry in the mixing tank 1 through the channel formed by the first connecting hole 311 and the second connecting hole 321, achieving single-time dosing. When the first connecting hole 311 rotates to the point where it is misaligned with the second connecting hole 321, the reagent delivery channel closes, and dosing stops.

[0041] When the drive rod 221 rotates, it drives the synchronizing rod 41 to rotate synchronously, and the synchronizing rod 41 drives the cam 411 to rotate synchronously. When the cam 411 rotates, the protruding part of the cam 411 presses against the push plate 421, and the push plate 421 presses against the movable end of the drive telescopic rod 42. The spring 422 is in a compressed state, and the air in the rodless chamber of the drive telescopic rod 42 is transported to the mixing tank 1 through the air blowing pipe 43 and the first one-way valve 431. The airflow blows the deposited coal slurry upward from the bottom of the tank.

[0042] When the protruding part of the cam 411 disengages from the push plate 421, the spring 422 resets, the movable end of the drive telescopic rod 42 and the push plate 421 reset, a negative pressure is formed in the rodless cavity of the drive telescopic rod 42, and outside air flows into the rodless cavity of the drive telescopic rod 42 through the reset pipe 44 and the second one-way valve 441 to replenish air for the next blowing.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coal slurry pretreatment device, characterized in that: The system includes a mixing tank (1), a mixing assembly (2), an intermittent dosing assembly (3), and an airflow disturbance assembly (4). The mixing tank (1) is vertically arranged and has a constricted bottom. The top of the mixing tank (1) is connected to a feed pipe (11), and a dosing pipe (12) is provided on one side of the feed pipe (11). One end of the dosing pipe (12) is connected to the interior of the mixing tank (1), and the bottom of the mixing tank (1) is connected to a discharge pipe (13). A butterfly valve (131) is installed on the discharge pipe (13). The mixing assembly (2) is located on the mixing tank (1) and is used to mix the flotation reagent and coal slurry in the mixing tank (1) evenly. The intermittent dosing assembly (3) is located inside the mixing tank (1) and is used to drive the flotation reagent to be added intermittently into the mixing tank (1). The airflow disturbance assembly (4) is located at the bottom of the mixing tank (1) and is used to drive the airflow to blow the coal slurry deposited at the bottom of the mixing tank (1).

2. The coal slurry pretreatment equipment according to claim 1, characterized in that: The stirring assembly (2) includes a first stirring part (21) and a second stirring part (22); the first stirring part (21) is located on the stirring tank (1) and is used to stir the coal slurry in the stirring tank (1) circumferentially; the second stirring part (22) is located inside the stirring tank (1) and is used to stir the coal slurry in the stirring tank (1) vertically.

3. The coal slurry pretreatment equipment according to claim 2, characterized in that: The first stirring unit (21) includes a motor (211), a drive gear (212), a rotating shaft (213), a gear ring (214), and a rotating cylinder (215); the motor (211) is installed at the top of the stirring tank (1); the drive gear (212) is fixedly mounted on the output shaft of the motor (211) and located inside the stirring tank (1); the rotating shaft (213) is rotatably mounted inside the stirring tank (1), and a driven gear (2131) is fixedly mounted on the rotating shaft (213), the driven gear (2131) meshing with the drive gear (212); the gear ring (214) is horizontally mounted inside the stirring tank (1) and meshes with the driven gear (2131), and a limit ring (2141) is fixedly mounted on the gear ring (214). The limiting ring (2141) is embedded in the mixing tank (1) and is rotatably connected to the mixing tank (1); the rotating cylinder (215) is fixedly set at the bottom end of the toothed ring (214) and is rotatably connected to the mixing tank (1); a baffle plate (2151) is fixedly set on the inner wall of the rotating cylinder (215), the baffle plate (2151) is inclined and multiple baffle plates are spaced apart along the circumference of the rotating cylinder (215); a fixing plate (111) is fixedly set on the feed pipe (11), the fixing plate (111) is horizontally set at the top of the mixing tank (1) and is rotatably connected to the rotating shaft (213), the fixing plate (111) abuts against the inner wall of the rotating cylinder (215), and one end of the dosing pipe (12) is inserted into the fixing plate (111).

4. The coal slurry pretreatment equipment according to claim 3, characterized in that: The first stirring section (21) further includes a side wall scraper (216); the side wall scraper (216) is fixedly disposed at the bottom end of the rotating cylinder (215) and abuts against the inner wall of the stirring tank (1); a bottom wall scraper (2161) is fixedly disposed at one end of the side wall scraper (216), and the bottom wall scraper (2161) abuts against the inner bottom wall of the stirring tank (1); two sets of the side wall scraper (216) and the bottom wall scraper (2161) are provided and are respectively located on both sides of the rotating cylinder (215).

5. The coal slurry pretreatment equipment according to claim 3, characterized in that: The second stirring unit (22) includes a drive rod (221), a limiting cylinder (222), a first bevel gear (223), a rotating rod (224), and a second bevel gear (225); the drive rod (221) is vertically arranged inside the stirring tank (1) and fixedly connected to the output shaft of the motor (211); the drive rod (221) is rotatably connected to the fixing plate (111); the limiting cylinder (222) is fixedly arranged at the bottom end of the fixing plate (111) and sleeved on the drive rod (221); the first A bevel gear (223) is fixedly mounted on the drive rod (221) and located inside the limiting cylinder (222); a rotating rod (224) is horizontally inserted into the limiting cylinder (222) and one end is located inside the limiting cylinder (222); a stirring blade (2241) is fixedly mounted on the rotating rod (224); a second bevel gear (225) is fixedly mounted on the rotating rod (224) and located inside the limiting cylinder (222); the second bevel gear (225) meshes with the first bevel gear (223).

6. The coal slurry pretreatment equipment according to claim 5, characterized in that: The first bevel gear (223), the rotating rod (224), the stirring blade (2241) and the second bevel gear (225) are arranged in multiple sets at intervals along the vertical direction; each set of the rotating rod (224), the stirring blade (2241) and the second bevel gear (225) is provided in two, and is located on both sides of the limiting cylinder (222).

7. The coal slurry pretreatment equipment according to claim 5, characterized in that: The interval dosing assembly (3) includes a collection box (31) and a support plate (32); the collection box (31) is rotatably disposed at the bottom end of the fixed plate (111) and coaxially disposed with the limiting cylinder (222); the dosing tube (12) passes through the fixed plate (111) and communicates with the inside of the collection box (31); a first connecting hole (311) is provided at the bottom of the collection box (31); a connecting rod (312) is fixedly disposed on one side of the collection box (31); one end of the connecting rod (312) is fixedly connected to the inner wall of the rotating cylinder (215); the support plate (32) is fixedly sleeved on the limiting cylinder (222) and located inside the collection box (31); a second connecting hole (321) is provided on the support plate (32).

8. A coal slurry pretreatment device according to claim 5, characterized in that: The airflow disturbance component (4) includes a synchronizing rod (41), a driving telescopic rod (42), an air blowing pipe (43), and a reset pipe (44); the synchronizing rod (41) is vertically arranged and inserted into the mixing tank (1), and the synchronizing rod (41) is fixedly connected to the driving rod (221); a cam (411) is fixedly arranged at one end of the synchronizing rod (41), and the cam (411) is located at the bottom end of the mixing tank (1); the driving telescopic rod (42) is horizontally arranged, and its fixed end is fixedly arranged at the bottom end of the mixing tank (1), and the rodless cavity of the driving telescopic rod (42) is filled with air; a push plate (421) is fixedly arranged on the movable end of the driving telescopic rod (42). The push plate (421) abuts against the cam (411); a spring (422) is provided in the rodless cavity of the drive telescopic rod (42), and the two ends of the spring (422) are fixedly connected to the movable end and the fixed end of the drive telescopic rod (42), respectively; the two ends of the air blowing pipe (43) are connected to the rodless cavity of the drive telescopic rod (42) and the inside of the mixing tank (1), respectively, and a first one-way valve (431) is installed on the air blowing pipe (43); one end of the reset pipe (44) is connected to the rodless cavity of the drive telescopic rod (42), and the other end is connected to the outside, and a second one-way valve (441) is installed on the reset pipe (44).

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