CN114713060A - A slurry mixing device with space-time heterogeneous circulating jet coupling - Google Patents

Abstract

The invention relates to a time-space non-homogeneous circulating jet flow coupled slurry mixing device, belongs to the technical field of coal slime separation and recovery, and solves the problem that particle medicaments in the slurry mixing device in the prior art are poor in collision effect. The jet flow circulation device comprises a stirring barrel body and a circulation jet flow assembly, wherein the stirring barrel body is of an inverted frustum structure, the circulation jet flow assembly is arranged outside the stirring barrel body, and the circulation jet flow assembly is communicated with the stirring barrel body to form a jet flow circulation passage. The time-space non-uniform circulating jet flow coupled pulp mixing device can improve the turbulence degree of ore pulp, increase the collision of granular agents in the ore pulp and be beneficial to the subsequent flotation and recovery of granules.

Description

A slurry mixing device with space-time heterogeneous circulating jet coupling

technical field

The invention relates to the technical field of coal slime sorting and recovery, in particular to a slurry conditioning device coupled with a space-time non-uniform circulating jet.

Background technique

Flotation is the most economical and effective separation method for coal and mineral resources, and has made outstanding contributions to the large-scale recovery of valuable resources in fine-grained low-grade coal and ore. The flotation process is carried out by using the surface and interface properties of the particles. The particles with good surface hydrophobicity are easily attached to the air bubbles and float as concentrates, while the hydrophilic gangue particles remain in the slurry and are discharged as tailings. With the widespread application of mechanized mining and heavy-medium beneficiation technology, the problems of large amount of coal slurry entering the floating, large content of conjoined bodies, and narrow effective separation range have become increasingly prominent. Therefore, improving the flotation equipment, refining the separation process, expanding the flotation range, and improving the separation efficiency are important measures to deal with the current coal resource problems.

Slurry mixing is the basis for the precise sorting of coal slime. Its main function is to realize the dispersion of traditional non-polar collectors in the slurry through high-speed shearing and stirring of the impeller, and enhance the selectivity between the collector oil droplets and the coal slime particles. Collision adsorption improves the hydrophobicity difference between clean coal particles and gangue minerals. The traditional mineral flotation and slurry preparation equipment is limited by the internal stirring structure, the mixing of the slurry is weak, the fine particles are strong with water, the probability of collision and adhesion with the chemical molecules is low, and the adaptability to the feeding conditions of wide-grained coal slime is poor, and it is difficult to effectively remove coarse particles. The fine mud that covers the surface of the particles. The low-level slurry mixing result aggravates the burden of subsequent flotation operations, which makes the mechanical stirring intensity in the flotation machine passively increased, deteriorates the flow field environment during the flotation process, increases the probability of desorption between particle bubbles, and is not conducive to particle flotation recovery. .

On the one hand, high-efficiency slurry mixing needs to remove the fine mud on the surface of clean coal particles to expose the fresh surface; In the traditional uniform flow field, the particles flow with the water flow, which is not conducive to the collision and friction of the particles and the effective energy transmission and distribution.

SUMMARY OF THE INVENTION

In view of the above analysis, the embodiments of the present invention aim to provide a pulp conditioning device with a space-time non-uniform circulating jet, so as to solve the problem of poor collision effect of particles and chemicals in the existing pulp conditioning device.

The present invention provides a slurry mixing device with space-time non-uniform circulating jet coupling, comprising a stirring barrel and a circulating jet assembly, wherein the stirring barrel is an inverted cone-shaped structure, and the circulating jet assembly is arranged in the stirring barrel Outside the body, the circulating jet assembly communicates with the mixing barrel to form a jet circulation passage.

Further, the upper part of the stirring barrel is a non-stirring zone, and the lower part is a stirring zone, the stirring zone is provided with a multi-stage mixing chamber, and the mixing chamber is provided with a stirring impeller.

Further, the diameter of the stirring impeller in the stirring zone decreases sequentially from top to bottom, the stirring impeller in the mixing chamber at the bottom end of the stirring zone is a straight-blade impeller, and the upper part of the stirring zone is The stirring impeller in the mixing chamber is a slant-blade impeller.

Further, a stirring baffle is arranged in the stirring barrel, and the stirring baffle is annular and is horizontally arranged on the inner wall of the stirring barrel.

Further, a pulp shearing disk is horizontally arranged in the mixing barrel, the pulp shearing disk is installed on the stirring shaft in the mixing barrel, and there is a space between the pulp shearing disk and the stirring baffle. gap.

Further, on the stirring shaft, the stirring impeller and the pulp shearing disc are alternately arranged, and the pulp shearing disc is one less than the stirring impeller, and the straight shaft is provided at the bottom end of the stirring shaft. Vane impeller.

Further, an upper circulation port and a lower circulation port are also opened in the stirring barrel. on the side wall of the pulp mixing chamber at the bottom of the stirring zone.

Further, the upper circulation port is not lower than the installation height of the stirring impeller in the same pulp mixing chamber, and the lower circulation port is located below the stirring impeller in the same pulp mixing chamber.

Further, the bottom of the mixing barrel is provided with a feeding port, and the central axis of the lower circulation port forms an included angle of 30° to 45° with the side wall of the mixing barrel, and faces the feeding port. .

Further, the circulating jet assembly includes a circulating pump, a circulating pipe and a jet drug suction throat, the upper circulation port, the circulating pipe, the circulating pump, the jet drug suction throat and the lower circulating port. The jet circulation passages are sequentially connected to form the jet circulation passages.

Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

(1) In the slurry mixing device of the present invention, the mixing barrel has an inverted cone-shaped structure, and with the flow of the ore pulp, the flow field in the mixing barrel is in a spatially non-uniform state, which can improve the turbulence degree of the ore slurry and increase the collision of the granules in the ore slurry. It is beneficial to the subsequent particle flotation recovery;

(2) The pulp mixing device of the present invention reasonably adopts stirring impellers of different sizes and styles, making full use of energy input while effectively protecting the main shaft and reducing main shaft wear; When entering the barrel, under the double action of the straight-blade impeller and the circulating jet, it is fully dispersed in the smaller cavity space, effectively emulsified, and then driven by the larger oblique-blade impeller to drive the overall slurry flow to promote the chemical slurry. The contact is uniform, and it conforms to the torque step-by-step, protecting the stirring shaft and reducing the failure rate;

(3) In the slurry mixing device of the present invention, the energy of the motor is input non-uniformly, and the flow field in the barrel presents a non-uniform flow state in time, which is conducive to the collision and friction of the particle medicine, and achieves effective energy transmission and distribution. The change of water pressure forms the hydraulic cavitation effect and removes the fine mud on the surface;

(4) The pulp mixing device of the present invention adopts the circulating jet to absorb the medicine, the medicine is sucked into the pulp by negative pressure, and the pressure drops suddenly when the water flow enters the barrel, and the pressure drops and the emulsification effectively disperses and emulsifies. The probability of contact with the agent, reducing the dosage of the agent;

(5) In the pulp mixing device of the present invention, the lower circulation port and the mixing barrel are at an angle of 30° to 45°, and are directly opposite to the feeding port, forming a countercurrent to increase the turbulence of the pulp and further strengthen the emulsification and dispersion of the medicine;

(6) In the pulp conditioning device of the present invention, the coupling effect of the time-space non-uniform flow field circulating jet can improve the turbulence of the pulp, reduce the dosage of chemicals, improve the efficiency of energy transmission and distribution, and improve the pretreatment level of the pulp, which is the next high-efficiency flotation process. lay the foundation;

(7) The slurry conditioning device of the present invention realizes high-efficiency pre-selection slurry conditioning by adopting dual-channel jet circulating emulsification dosing and spatiotemporal non-uniform forced stirring coupling slurry conditioning, which is beneficial to the development of a short-flow high-efficiency flotation process.

In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combination solutions. Additional features and advantages of the invention will be set forth in the description which follows, and some of the advantages may become apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by means of particularly pointed out in the description and drawings.

Description of drawings

The drawings are for the purpose of illustrating specific embodiments only and are not to be considered limiting of the invention, and like reference numerals refer to like parts throughout the drawings.

1 is a schematic structural diagram of a space-time non-uniform circulating jet coupling slurry conditioning device according to a specific embodiment;

FIG. 2 is a top view of a space-time heterogeneous circulating jet coupling slurry conditioning device according to a specific embodiment.

Reference number:

1 mixing barrel body; 2 barrel cover; 3 motor; 4 mixing shaft; 5 feeding port; 6 overflow port; 7 straight-blade impeller; 8 oblique-blade impeller; Shearing disc; 12 upper circulation port; 13 lower circulation port; 14 fresh water replenishment port; 15 medicine barrel; 16 circulation pump; 17 circulation pipe; 18 jet suction throat.

Detailed ways

The preferred embodiments of the present invention are specifically described below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention, and together with the embodiments of the present invention, are used to explain the principles of the present invention, but not to limit the scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the term "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection , which can be mechanical connection, electrical connection, direct connection, or indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The terms "top," "bottom," "above," "under," and "over" as used throughout the description are relative positions with respect to components of a device, such as top and bottom substrates inside the device relative position. It is understood that the devices are multifunctional regardless of their orientation in space.

A specific embodiment of the present invention, as shown in Figures 1 and 2, discloses a slurry conditioning device (hereinafter referred to as a slurry conditioning device) coupled with a space-time heterogeneous circulating jet, comprising a stirring barrel 1 and a circulating jet assembly, The mixing barrel 1 is an inverted truncated cone structure. The circulating jet assembly is arranged outside the mixing barrel 1 for jet dosing. The circulating jet assembly communicates with the mixing barrel 1 to form a jet circulation passage.

Compared with the prior art, in the slurry mixing device provided in this embodiment, the mixing barrel has an inverted cone-shaped structure, and with the flow of the ore slurry, the flow field in the mixing barrel is in a spatially non-uniform state, which can improve the turbulent flow of the ore slurry and increase the amount of the ore pulp. The collision of medium particles is beneficial to the subsequent particle flotation recovery; the circulating jet is used to absorb the medicine, and the medicine is sucked into the pulp by negative pressure. When the water flow enters the inverted cone-shaped stirring barrel, the pressure drops and the emulsification effectively disperses and emulsifies, which is conducive to the recovery of the medicine. Evenly disperse, improve the full integration of the agent and the pulp.

In order to prevent the slurry in the mixing barrel 1 from overflowing from the upper end of the mixing barrel 1 and carrying the power unit, the upper end of the mixing barrel 1 is provided with a barrel cover 2 . The upper end of the barrel cover 2 is provided with a power unit to provide power for the stirring of the pulp.

The power unit includes a motor 3 and a power transmission mechanism. The motor 3 transmits power to the stirring shaft 4 arranged in the stirring barrel 1 through the power transmission mechanism.

One end of the stirring shaft 4 is connected to the power transmission mechanism through the barrel cover 2 , and the other end is located in the stirring barrel 1 and is in a cantilever shape. Specifically, a through hole is formed in the middle of the barrel cover 2, a bearing is arranged in the through hole, and the stirring shaft 4 is connected to the power transmission mechanism through the bearing.

The power transmission mechanism may be a gear transmission mechanism, a sprocket transmission mechanism or a belt transmission mechanism, preferably, the power transmission mechanism is a belt transmission mechanism.

In this embodiment, the motor 3 transmits the power to the stirring shaft 4 through the belt transmission mechanism. Compared with the meshing transmission, the belt transmission mechanism has a simple structure, low manufacturing cost, and convenient installation and maintenance. The pulp mixing device runs smoothly during the pulp mixing process, and the noise is low during operation.

The motor 3 is a variable frequency motor, and the motor 3 rotates at a non-uniform speed, and the speed is uniformly reciprocated from 600 r/s to 800 r/s to form a time-uniform flow field. In addition, because the mixing barrel 1 is an inverted cone-type barrel, the ore slurry flows unevenly in space in the mixing barrel 1, and the uneven time flow field formed by the non-uniform rotation of the motor 3 and the space formed by the inverted-cone table-type mixing barrel 1. The non-uniform flow field is combined to form a time-space non-uniform flow field, and then coupled to the circulating jet to absorb the medicine, which not only strengthens the stirring and dispersing of the medicine, but also increases the energy transmission and distribution gradient, saving electricity.

Considering that the ore pulp in the mixing barrel 1 sometimes needs to be diluted to avoid the viscosity of the ore pulp affecting the mixing effect and the rotation of the stirring shaft 4, the barrel cover 2 is provided with a fresh water replenishing port 14, and the fresh water replenishing pipe and the fresh water replenishing The port 14 is connected, and a valve is provided on the fresh water supply pipe. When it is necessary to add fresh water to the mixing barrel 1, the valve can be opened.

Understandably, in order to feed the raw material of the ore pulp into the mixing barrel 1 and output the stirred ore slurry to the outside of the mixing barrel 1, the mixing barrel 1 is provided with a feeding port 5 and an overflow port 6. The port 5 is located at the lower part of the mixing barrel 1 , and the overflow port 6 is provided at the upper part of the mixing barrel 1 .

In this embodiment, since the ore slurry in the mixing barrel 1 moves from the bottom up, the ore slurry flows upward only when there is enough ore slurry below, that is, the ore slurry needs upward thrust. In order to facilitate the better upward movement of the ore slurry, the feeding port 5 is located in the middle of the lower end of the mixing barrel 1, that is, the feeding port 5 is located in the middle of the small bottom surface of the inverted cone.

In this embodiment, the overflow port 6 is located at the upper end of the cylindrical surface of the mixing barrel 1 and is disposed adjacent to the barrel cover 2 .

The mixing barrel 1 is provided with a multi-stage pulp mixing chamber from the feeding port 5 to the overflow port 6, and the pulp mixing chamber is provided with a stirring impeller, and the pulp is stirred by the stirring impeller. Preferably, the mixing barrel 1 is provided with three stages of pulp mixing chambers.

The diameter of the stirring impeller gradually decreases from top to bottom. The diameter ratio of the top stirring impeller and the bottom stirring impeller is between 4:3 and 2:1, and the diameter of the middle stirring impeller is between the upper and lower stirring impellers.

The stirring barrel 1 is provided with a stirring partition 10 , and the stirring partition 10 is annular and is horizontally arranged on the inner wall of the stirring barrel 1 . In this embodiment, three stirring baffles 10 are provided. Since the stirring barrel 1 is of an inverted cone-shaped structure, the outer diameters of the three stirring baffles 10 are not equal.

In order to achieve a better purpose of slurry mixing, the mixing barrel 1 is also provided with a pulp shearing disc 11, which is horizontally arranged in the mixing barrel 1 and installed on the mixing shaft 4. The pulp is sheared under the drive.

The pulp shearing disc 11 has a circular disc-shaped structure and is fixed on the stirring shaft 4. In order to improve the shearing effect on the pulp, the pulp shearing disc 11 is symmetrically provided with a plurality of long holes, and the long holes are along the pulp shearing disc. 11 is opened in the radial direction and arranged in the circumferential direction. One edge of the long hole is turned down, and the downturned edge is lower than the lower surface of the pulp shearing disc 11 .

In this embodiment, long holes are opened on the pulp shearing disc 11, which can not only be used for the passage of the pulp, but also can increase the shearing force by using the edge of the long hole turned downward.

The number of pulp shearing discs 11 is one less than that of the stirring baffles 10. The pulping shearing discs 11 are arranged from the lower end of the stirring barrel 1 to face the stirring baffles 10. There is a gap for the passage of coarse particles in the pulp to prevent the agitating impeller from jamming caused by the coarse particles in the pulp.

In the present embodiment, there are two pulp shearing discs 11 , which are respectively disposed opposite to the two stirring baffles 10 arranged in the lower part of the stirring barrel 1 .

It should be noted that on the stirring shaft 4, the stirring impeller and the pulp shearing disc 11 are alternately arranged, the end of the stirring shaft 4 is provided with a stirring impeller, and the pulp shearing disc 11 and the stirring impeller are alternately arranged upwards.

The inside of the mixing barrel 1 is divided into a plurality of pulping chambers by the mixing baffle 10 and the pulp shearing disc 11 , that is to say, the adjacent pulping chambers are separated by the mixing baffle 10 and the pulp shearing disc 11 .

In order to effectively reduce the droplet diameter of the medicine and promote the dispersion of the medicine, the stirring impeller in the mixing chamber at the lowermost end of the mixing barrel 1 is a straight-blade impeller 7 , and the other mixing chambers are inclined-blade impeller 8 . The adjustment device adopts the design of small space and high shear, so that when the medicine enters the mixing barrel 1, the droplets of the medicine are as small as possible, and the medicine is dispersed as much as possible, and then through the next lower turbulent flow and stirring in a larger space Evenly and effectively mix the agent and the pulp to improve the effect of the agent.

In this embodiment, the three-stage mixing chambers in the mixing barrel 1 are the first mixing chamber, the second mixing chamber and the third mixing chamber respectively from bottom to top, and the first mixing chamber is provided with a straight blade type mixing chamber. The impeller 7 is used to form sufficient preliminary turbulent flow. The second and third pulp mixing chambers are both inclined-blade impellers 8, which are used to cooperate with the pulp shearing disc 11 to form the circulation in the pulp mixing chamber, and the high-energy straight blades The type impeller 7 can effectively reduce the diameter of the chemical droplet, promote the dispersion of the chemical, and fully mix with the pulp.

There is also a stirring baffle 9 in the stirring barrel 1. The stirring baffle 9 has the same inclination as the inner wall of the stirring barrel 1. There are four stirring baffles 9, which are evenly arranged along the inner wall of the stirring barrel 1. The baffles 9 are located between the stirring baffles 10 .

In this embodiment, the stirring baffles 9 are arranged in the second pulp mixing chamber and the third pulp mixing chamber, and the stirring baffles 9 cooperate with the inclined-blade impeller 8 to enhance the stirring effect on the pulp.

In order to make the ore slurry in the mixing barrel 1 circulate, the mixing barrel 1 is also provided with an upper circulation port 12 and a lower circulation port 13 . The upper circulation port 12 is set on the side wall of the uppermost pulp mixing chamber, and is not lower than the installation height of the stirring impeller in the coherent pulp chamber, and the lower circulation port 13 is set on the side wall of the lowermost pulp mixing chamber, and is located in the coherent pulp chamber. under the stirring impeller.

It should be noted that, in this implementation, the upper circulation port 12 is not lower than the height of the stirring impeller in the drum mixing chamber, which means that the center of the upper circulation port 12 is not lower than the horizontal symmetry plane of the stirring impeller.

In this embodiment, the upper circulation port 12 is set on the side wall of the third pulp mixing chamber, not lower than the inclined-blade impeller 8 in the third pulp mixing chamber, and the lower circulation port 13 is set on the side wall of the first pulp mixing chamber , located below the straight-blade impeller 7 in the first mixing chamber.

It is worth noting that the inner cavity of the mixing barrel 1 is divided into two parts, the upper area is the non-stirring area, and the lower area is the mixing area, that is, the multi-stage mixing chamber. That is to say, in this embodiment, the third mixing chamber is Above is the no-stirring zone.

The upper circulation port 12 is set in the multi-stage pulp mixing chamber and is located at the upper end of the multi-stage pulp mixing chamber, which avoids the possibility that the pulp may be poured back to the circulation port and block the chemical passage during shutdown caused by setting the upper circulation port 12 in the non-stirring zone, causing serious failure. It also avoids the problem of partial short circuit and incomplete circulation of the pulp caused by setting the upper circulation port 12 below the uppermost stirring impeller (the inclined-blade impeller 8 in the third pulp mixing chamber in this embodiment).

The central axis of the lower circulation port 13 forms an included angle of 30° to 45° with the side wall of the mixing barrel 1, and faces the feeding port 5 directly, so as to form a countercurrent and increase the turbulence of the pulp.

The circulating jet assembly includes a circulating pump 16, a circulating pipe 17 and a jet drug suction throat 18. The upper circulation port 12, the circulating pipe 17, the circulating pump 16, the jet drug suction throat 18 and the lower circulating port 13 are connected in sequence to form a jet circulation path.

The jet medicine suction throat 18 is also provided with a medicine barrel 15, the jet medicine suction throat 18 is a venturi tube, and the inlet end of the venturi tube is connected to the upper circulation port 12 through the circulation pump 16 and the circulation tube 17, and the diffusion of the venturi tube. The lower circulation port 13 communicates with each other.

In this embodiment, the circulating jet is used to suck the medicine, and the medicine is sucked into the pulp by negative pressure. When the water flow enters the stirring barrel 1, the pressure drops suddenly, and the pressure drops to effectively disperse and emulsify. Probability to reduce the dosage of the drug.

In order to improve the stirring effect of the pulp, there are two circulating jet components, which are symmetrically distributed on both sides of the stirring barrel 1. Understandably, there are two sets of upper circulation ports 12 and lower circulation ports 13 symmetrically.

In this embodiment, the pulp enters from the feeding port 5, is vigorously stirred and dispersed by the straight-blade impeller 7 of the first pulp mixing chamber, and is transported by the inclined-blade impeller 8 between the pulp shearing plate 11 and the stirring baffle 10. In the third pulp mixing chamber, part of the pulp flows out from the upper overflow port 6 to become a stirring product, and a part of the pulp is sucked from the upper circulation port 12 into the circulating jet section, and the medicine is sucked by the jet from the medicine barrel 15. The medicine throat 18 is sucked under negative pressure, and injected into the mixing barrel 1 through the lower circulation port 13, forming a countercurrent with the feeding port 5 to enhance the dispersion of the medicine.

The slurry mixing device of this embodiment uses the inverted conical frustum-shaped stirring barrel 1 to fully increase the rotational speed to disperse the chemical, promote the uniform contact between the mineral particles and the chemical, and at the same time protect the stirring shaft 4 as much as possible, reduce the torque of the stirring shaft 4 and reduce the failure rate. . The design of the inverted cone-shaped barrel and the upper large and the lower impeller can ensure that when the agent enters the barrel, it is fully dispersed in a small cavity space under the dual action of the straight-blade impeller and the circulating jet, and is effectively emulsified. The larger inclined-blade impeller drives the overall slurry flow, promotes uniform contact of the chemical slurry, and conforms to the torque step-by-step, protects the stirring shaft 4 and reduces the failure rate.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention.

Claims (10)

1. A slurry mixing device of space-time non-uniform circulating jet coupling, characterized in that it comprises a stirring barrel (1) and a circulating jet assembly, wherein the stirring barrel (1) is an inverted truncated cone-shaped structure, and the circulating The jet assembly is arranged outside the mixing barrel (1), and the circulating jet assembly communicates with the mixing barrel (1) to form a jet circulation passage. 2. The slurry mixing device of space-time non-uniform circulating jet coupling according to claim 1, characterized in that, the inner upper part of the stirring barrel (1) is a non-stirring zone, and the lower part is a stirring zone, and the stirring zone is set. There are multi-stage pulp mixing chambers, and a stirring impeller is arranged in the pulp mixing chamber. 3 . The slurry mixing device with space-time non-uniform circulating jet coupling according to claim 2 , wherein the diameter of the stirring impeller in the stirring zone decreases sequentially from top to bottom, and the bottom of the stirring zone decreases. 4 . The stirring impeller in the pulp mixing chamber at the end is a straight-blade impeller (7), and the stirring impeller in the pulp mixing chamber in the upper part of the stirring zone is a slant-blade impeller (8). 4. The slurry mixing device with space-time heterogeneous circulating jet coupling according to claim 3, characterized in that, a stirring baffle (10) is provided in the stirring barrel (1), and the stirring baffle (10) ) is annular, and is horizontally arranged on the inner wall of the mixing barrel (1). 5 . The pulping device with space-time non-uniform circulating jet coupling according to claim 4 , wherein the mixing barrel ( 1 ) is horizontally provided with a pulp shearing disc ( 11 ), and the pulp shears The disc (11) is installed on the stirring shaft (4) in the stirring barrel (1), and a gap is left between the pulp shearing disc (11) and the stirring partition (10). 6. The space-time non-uniform circulating jet coupling slurry conditioning device according to claim 5, characterized in that, on the stirring shaft (4), the stirring impeller and the pulp shearing disc (11) are alternately arranged , and the pulp shearing disc (11) is one less than the stirring impeller, and the straight-blade impeller (7) is provided at the bottom end of the stirring shaft (4). 7. The slurry mixing device with space-time non-uniform circulating jet coupling according to claim 2, wherein an upper circulation port (12) and a lower circulation port (13) are also opened in the stirring barrel (1) , the upper circulation port (12) is arranged on the side wall of the slurry mixing chamber at the top of the stirring area, and the lower circulation port (13) is arranged at the bottom of the mixing area in the mixing area. on the side wall. 8 . The pulp mixing device with space-time non-uniform circulating jet coupling according to claim 7 , wherein the upper circulation port (12) is not lower than the installation height of the stirring impeller in the same pulp mixing chamber, 9 . The lower circulation port (13) is located below the stirring impeller in the same mixing chamber. 9 . The slurry mixing device with space-time non-uniform circulating jet coupling according to claim 7 , wherein the bottom of the stirring barrel ( 1 ) is provided with a feeding port ( 5 ), and the lower circulation port ( 13) The central axis and the side wall of the mixing barrel (1) form an included angle of 30° to 45°, and face the feeding port (5). 10. The space-time heterogeneous circulating jet coupling slurry conditioning device according to claims 7-9, wherein the circulating jet assembly comprises a circulating pump (16), a circulating pipe (17) and a jet drug suction throat (18), the upper circulation port (12), the circulation pipe (17), the circulation pump (16), the jet suction throat pipe (18) and the lower circulation port (13) are communicated in sequence The jet circulation passage is formed.

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