CN110038476A - A kind of jet stream-stirring manifold type powdery flocculation medicament quantifies dispersion mixing system - Google Patents

Abstract

The invention relates to the field of flocculation agent addition in a coal slime water treatment process, in particular to a jet-stirring coupled powder flocculation agent quantitative dispersion mixing system. The invention at least includes an annular jet device, and also includes a medicine storage system, a medicine quantitative delivery and addition system, a jet-stirring coupled dispersion system and a PLC intelligent control system. The jet-stirring coupled dispersion system is the core subsystem of the present invention, including an annular jet device and a stirring and dispersing device, wherein the annular jet device consists of a screw pump, a pressure water pipe, an ejector gas pipe, a mixing chamber, a nozzle and a pressure-stabilizing throat. Composition; The stirring and dispersing device includes a stirring mechanism and a mixing and stirring barrel. The stirring mechanism is composed of a stator, a sleeve, a shaft and a double-layer impeller. The bottom of the mixing and stirring barrel is designed with a false bottom, and several baffles are arranged on the barrel wall. Above the barrel wall are arranged Liquid level measurement device; this system fully considers the addition and dissolution characteristics of flocculation agents, and can accurately and quantitatively add powder agents and solutions at the same time.

Description

A jet-stirring coupled powder flocculant quantitative dispersion mixing system

technical field

The invention relates to the field of flocculation agent addition in a coal slime water treatment process, in particular to a jet-stirring coupled powder flocculation agent quantitative dispersion mixing system.

Background technique

The vast majority of coal preparation plants in my country use wet coal preparation. Coal slime water treatment is an important part of the wet coal preparation process. From the perspective of economy and environmental protection, it is required that the slime water be deeply clarified and the washing water be closed in a closed circuit. Coal preparation plants usually use the coagulation method to treat the slime water. The so-called coagulation method is to add a coagulant to the slime water system to make the particles in the slime water system agglomerate and then settle by gravity. The commonly used coagulants are organic polymer flocculants, such as polyacrylamide. Since organic polymer flocculants have the characteristics of large molecular weight and long side chains, there are disadvantages such as long dissolution time and insufficient dissolution. Uneven addition and dispersion and mixing will result in incomplete dissolution of the agent within the specified time, low concentration of the agent in the aqueous solution, and waste of the agent. In severe cases, it will directly affect the treatment effect of coal slime water. The traditional method of flocculant preparation in coal preparation plants is to manually add powdered flocculant to the mixing and stirring tank for direct stirring. Moreover, it is necessary to set up a special post driver to observe the liquid level and add the powdered flocculant on time. There is a certain hysteresis and the amount of dosing is artificially biased. Although the utility model 201721157662.5 proposes to use a screw feeder for feeding to solve the problem of uneven feeding, and the invention patent 201410260122.4 proposes to use a drug dispersing sieve to achieve the purpose of uniform dispersion of the drug during the feeding process, it cannot solve the problem of insufficient mixing and stirring. Process agglomeration and storage silo arch and agglomeration. Therefore, a powdery flocculating agent quantitative dispersing mixing device or system is needed to solve the problem of insufficient mixing of the agent, "swelling" agglomeration during the dissolution process, and insufficient dissolution of the powdery agent. The problem. (Swelling refers to the phenomenon that if several particles of the polymer flocculant of powdery particles are gathered together and then fall into the water, after the surface of a particle swells, it wraps other particles, and the particles cannot be separated, resulting in incomplete dissolution.)

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and design a jet-stirring coupled pharmaceutical quantitative dispersion mixing system, the core subsystem of which is a jet-stirring coupled dispersion system, including an annular jet device and a stirring and dispersing device; other components The system also has a pharmaceutical storage system, a pharmaceutical quantitative conveying and adding system, and a PLC intelligent control system, which can disperse and mix a quantitative powdered pharmaceutical in a unit volume of liquid water to ensure that the powdered pharmaceutical is added according to the required amount, and is uniformly dispersed and quickly dispersed in the aqueous solution. Dissolution, to avoid problems such as deviation of dosing dosage, “swelling” agglomeration of powdery flocculation agents, difficulty in dissolving, etc. The device has the advantages of reasonable structure and high degree of automation, which can eliminate the deviation caused by human factors in the process of material storage, transportation and addition, and at the same time ensure the efficient dispersion of the powdered agent in the aqueous solution, providing good flocculation agent conditions for the subsequent coal slime water treatment work. .

To achieve the above object, the present invention has adopted the following technical solutions:

A jet-stirring coupled powder flocculating agent quantitative dispersion mixing system, at least including an annular jet device, and also includes the following components:

A jet-stirring coupled dispersion system, the dispersion system includes an annular jet device and a stirring and dispersing device; the annular jet device mainly includes a feeding screw pump, a pressure water pipe, an ejector gas pipe, a mixing chamber, a nozzle and a pressure-stabilizing throat The feeding screw pump transports the liquid water that needs to be added to the annular jet device through the pressure water pipe, and is ejected by the nozzle at a high speed, forming a negative pressure in the mixing chamber, and sucking the external fluid from the ejector gas pipe, and the ejector gas pipe and the Quantitative drug delivery and the pneumatic conveying pipeline of the adding system are connected. Under the combined action of the blowing force of the pneumatic conveying pipeline and the suction of the mixing chamber, the powdered drug enters the mixing chamber of the annular jet device in a dispersed state, and the jet of the fluid ejected from the nozzle impacts. Under the action of cutting and cutting, the preliminary dispersion of the medicine in the water is realized, and the aqueous solution of the medicine enters the hollow channel between the sleeve and the shaft of the stirring and dispersing device through the pressure-stabilizing throat; the stirring and dispersing device includes a stirring mechanism and a mixing and stirring bucket. The mechanism consists of a stator, a sleeve, a shaft and a double-layered impeller. There is a circulation hole above the stator. Part of the chemical solution in the mixing tank re-enters the impeller from the circulation hole, and is stirred and dispersed again. There is a guide plate below the stator. It can stabilize the moving direction of the fluid. The hollow design between the sleeve and the shaft is the channel for the discharge of the annular jet device to enter the stirring and dispersing device. The double-layer impeller is driven to rotate to realize the continuous dispersion, mixing and dissolution of the aqueous solution in the mixing and stirring barrel; the bottom of the mixing and stirring barrel is designed with a false bottom to prevent the pharmaceutical aqueous solution from being directly "stringed" from the discharge port. The wall of the mixing and stirring barrel is arranged with several The baffle plate eliminates the "cylindrical rotation area" in the barrel and improves the stirring performance of the agitator. A liquid level measuring device is also designed above the barrel wall; the liquid level measuring device mainly includes an ultrasonic probe and a floating ball. The floating ball is installed in In the floating ball channel on the outer edge of the baffle, the floating ball moves vertically up and down with the liquid level, eliminating the influence of the liquid level fluctuation caused by stirring on the measurement results, and the liquid level measuring device transmits the measured liquid level data to the PLC intelligent Control system, PLC intelligent control system through data analysis, if it is found that the liquid level is lower than the lower limit of the set value, the annular jet device feeding screw pump will be turned on, and the annular jet will be stopped when the liquid level is higher than the upper limit of the set value. The device feeds the screw pump, and the stirring mechanism continues to operate during this process, finally realizing the efficient dissolution of the drug.

The ejector gas pipe of the annular jet device is connected with the pneumatic conveying pipeline of the quantitative conveying and adding system of the medicine; the quantitative conveying and adding system of the medicine is mainly composed of a screw feeder, a blower and a pneumatic conveying pipeline; the screw feeder It includes screw feed chute, screw push rod and variable frequency drive motor. The screw push rod is connected with the variable frequency drive motor. The speed of the screw push rod is adjustable, so as to achieve the purpose of quantitatively controlling the amount of powder flocculant added. The screw feeder discharges the material. The port is connected to the pneumatic conveying pipeline; the power source device connected to the pneumatic conveying pipeline is a blower, and the blower blowing operation blows the powder flocculating agent quantitatively fed by the screw feeder into the ejection air pipe of the annular jet device .

PLC intelligent control system, the liquid level measuring device, the annular jet device feeding screw pump, the variable frequency drive motor of the screw feeder and the blower are intelligently linked by the PLC intelligent control system, and start or stop actions at the same time.

The beneficial effects of the present invention are:

1) The jet-stirring coupled dispersion system, the pharmaceutical storage system, the pharmaceutical quantitative delivery and addition system and the PLC intelligent control system of the present invention cooperate together to form a jet-stirring coupled powder flocculant quantitative dispersion mixing system, which is suitable for the device. The degree of automation of the addition method of the preparation is greatly improved, which greatly reduces the input of manpower and material resources, and at the same time avoids the deviation of the addition amount of the medicine caused by human factors, and the dispersion and mixing of the medicine in the aqueous solution are more uniform, and the dissolution rate of the medicine is faster and more complete, thereby reducing the Pharmacy consumption.

2) The top of the storage bin of the pharmaceutical storage system of the present invention is designed as an open feed port, which is convenient for the pouring of powdered materials and the observation of the material storage. Post inspection; automatic control of the unloading of the storage bin, electromagnetic vibration exciters on both sides of the inverted cone at the lower part of the storage bin can vibrate the powdered flocculant evenly, preventing the occurrence of arching in the bin, and the bottom of the storage bin is The discharge port is connected to a star discharger, which can ensure the uniform discharge of powder flocculation agents and prevent blockage and agglomeration during the discharge process.

3), the pharmaceutical quantitative conveying and adding system of the present invention is mainly composed of a screw feeder, a blower and a pneumatic conveying pipeline. The screw feeder includes a screw feed chute, a screw push rod and a variable frequency drive motor. The motor is connected, the cross-sectional area S of the screw feeding chute is constant, and the amount of medicine stored per unit area M is constant. ×M×υ, by controlling the rotational speed of the screw push rod, the purpose of quantitatively controlling the amount of powdered flocculant added is achieved; the discharge port of the screw feeder is connected with the pneumatic conveying pipeline, and the power source device of the pneumatic conveying is the blower, the blower The powdery flocculation agent conveyed by the screw feeder is blown into the annular jet device in the agent dispersing device by blowing air.

4), the jet-stirring coupled dispersion system of the present invention, the dispersion system includes an annular jet device and a stirring and dispersing device; the annular jet device mainly includes a feeding screw pump, a pressure water pipe, an ejector gas pipe, a mixing chamber, Nozzle and pressure-stabilizing throat, the liquid water enters the annular jet device through the pressure water pipe under the action of the screw pump, and forms a negative pressure in the mixing chamber to suck the powder flocculant in the jet pipe, and the powder flocculant is blown by the blower. Under the combined action of the suction of the mixing chamber, it enters the annular jet device, and the powdery flocculant is uniformly dispersed in the liquid water under the impact and cutting of the jet, and after mixing with the liquid water, it enters the jacket of the stirring and dispersing device through the pressure-stabilizing throat. The hollow channel between the barrel and the shaft; the stirring and dispersing device ensures the continuous turbulent motion of the aqueous solution of the mixed agent in the mixing and stirring barrel. The stirring and dispersing device mainly includes the mixing and stirring barrel and the stirring mechanism. The stirring mechanism consists of a stator, a sleeve, a shaft and a double layer. The stator is composed of an impeller, the stator can keep the liquid level stable, and there is a circulation hole above the stator. Part of the chemical solution in the mixing tank re-enters the impeller from the circulation hole, and is stirred and dispersed again. There is a guide plate under the stator, which can stabilize the movement of the fluid. The hollow design is adopted between the sleeve and the shaft, which is the channel for the discharge of the annular jet device to enter the stirring and dispersing device. The medicinal solution enters the double-layer impeller in a spiral downward flow in the hollow channel, and the shaft drives the double-layer impeller to rotate. , The impeller cooperates with the stator (guide plate) and the false bottom to form a W-shaped flow form of the liquid, enhance the turbulence of the liquid, and realize the continuous dispersion, mixing and dissolution of the aqueous solution in the mixing tank; the bottom of the mixing tank is designed with a false bottom to prevent The aqueous solution of the chemical is directly "stringed" from the discharge port, and several baffles are arranged on the wall of the mixing and stirring barrel to eliminate the "cylindrical rotation area" in the barrel and improve the stirring performance of the agitator. A liquid level measuring device is also designed above the barrel wall. The liquid level measuring device mainly includes an ultrasonic probe and a floating ball, which is installed in the floating ball channel on the outer edge of the baffle. The liquid level measuring device transmits the measured liquid level data to the PLC intelligent control system. The PLC intelligent control system analyzes the data. If the liquid level is found to be lower than the lower limit of the set value, the annular jet device feeds the screw pump. , when the liquid level is higher than the upper limit of the set value, the operation of the feeding screw pump of the annular jet device is stopped. During this process, the stirring mechanism continues to operate, and finally the efficient dissolution of the drug is realized.

5), the PLC intelligent control system of the present invention can link the electromagnetic vibration exciter, the star discharger, the screw feeder, the blower and the annular jet device to achieve precise quantitative dosing and uniform dispersion of the medicament; The measuring device transmits the liquid level data of the mixing tank to the PLC intelligent control system. The intelligent control device analyzes the data. If the liquid level is lower than the lower limit of the set value, the feeding screw pump of the annular jet device is turned on to the mixing tank. Add liquid water, and at the same time open the electromagnetic exciter, star discharger, screw feeder and blower to blow the quantitative powdery flocculant corresponding to the liquid water flow into the ejection tube of the annular jet device to achieve The powdery flocculant is uniformly dispersed in the liquid water. When the liquid level is higher than the upper limit of the set value, stop the feeding screw of the electromagnetic exciter, star discharger, screw feeder, blower and annular jet device at the same time. During the pump operation, the stirring impeller continues to operate, and finally the efficient dissolution of the agent is realized.

6) The feeding screw pump of the annular jet device is a positive displacement pump, and its fluid flow per unit time is stable; the amount of powder medicine conveyed by the screw feeder is related to the speed of the screw push rod, and it can also achieve quantitative control. It can realize accurate quantitative addition of powdered chemicals in water.

Description of drawings

Fig. 1 is the front schematic diagram of the present invention;

Fig. 2 is each system logical relation diagram of the present invention;

3 is a schematic front view of the annular jet device in the structure of FIG. 1;

The corresponding relationship between each structure shown in the figure and the name of the component of the present invention is as follows:

A-drug storage system B-drug quantitative delivery and addition system C-jet-stirring coupled dispersion system

D-PLC intelligent control system 1-silo cover 2-storage bin 3-electromagnetic vibration exciter 4-star discharger

5- Frequency conversion drive motor 6- Screw feeder 6A- Screw push rod 6B- Screw feed chute

7-Blower 8-Pneumatic conveying pipeline 9-Screw pump 10-Pressure water pipe

11-annular jet device 12-belt pulley 13-stirring and dispersing device 14-stirring mechanism

15-Sleeve 16-Stator 16A-Guide piece 16B-Circulation hole 17-Hollow channel

18-shaft 19-double impeller 20-suction chamber 21-false bottom 22-discharge port

23-Liquid level measuring device 23A-Ultrasonic probe 23B-Float ball 23C-Float ball channel

24-mixing bucket 25-baffle plate 26-pressure water pipe 27-injection gas pipe 28-mixing chamber

29-Nozzle 30-Regulatory Throat

Detailed ways

The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example. The present invention is applied in the powdery flocculation agent adding system in the coal slime water treatment process

As shown in Figure 1-3, a jet-stirring coupled powder flocculant quantitative dispersion mixing system includes the following components:

A pharmaceutical storage system (A), the storage system comprises a storage bin (2), an electromagnetic exciter (3), and a star-shaped discharge valve (4) that are connected in sequence; the upper part of the storage bin is cylindrical, and the lower part is Inverted cone shape, the top of the storage bin is an open feed port, the feed port is provided with a bin cover (1) to prevent the powdery flocculants from absorbing water and agglomerating, and a discharge port is provided at the bottom, at the lower part of the storage bin (2). Electromagnetic vibration exciters (3) are arranged on both sides of the inverted cone, and the electromagnetic vibration exciters (3) can evenly vibrate the powdery flocculating agent of the storage bin (2), so as to prevent the occurrence of arching in the bin and vibrate and fall off. The raw material is discharged from the discharge port at the bottom of the storage bin, and the discharge port at the bottom of the storage bin is connected to the star discharger (4), which can ensure the uniform discharge of the powder flocculation agent and prevent blockage and stagnation during the discharge process. If the group phenomenon occurs, the screw feeder (6) is connected to the outlet of the star discharger;

Quantitative drug delivery and addition system (B), which is mainly composed of a screw feeder (6), a blower (7) and a pneumatic conveying pipeline (8); the screw feeder includes a screw feed chute (6B), a screw pusher The rod (6A) is connected with the variable frequency drive motor (5), the screw push rod (6A) is connected with the variable frequency drive motor (5), and the star discharger (4) discharges the powdery flocculant into the screw feed chute (6B) , under the pushing action of the screw push rod (6A), it moves towards the discharge port of the screw feeder, and the speed of the screw push rod (6A) is adjustable, so as to achieve the purpose of quantitatively controlling the amount of powder flocculant added. The discharge port of the machine is connected with the pneumatic conveying pipeline (8), and the pneumatic conveying pipeline (8) is respectively connected with the power source devices of pneumatic conveying-the blower (7) and the annular jet device (11), and the screw feeder (6) is quantitative The fed powdery flocculating agent is blasted by the blower (7) and pneumatically transported to the annular jet device (11);

A jet-stirring coupled dispersion system (C), the system mainly consists of an annular jet device (11), a stirring and dispersing device (13) and a liquid level measuring device (23); the annular jet device mainly includes a pressure water pipe (26) , ejection gas pipe (27), mixing chamber (28), nozzle (29) and pressure-stabilizing throat (30); the stirring and dispersing device mainly includes a stirring mechanism (14) and a mixing and stirring tank (24), and the stirring mechanism is composed of a stator ( 16), a sleeve (15), a shaft (18) and a double-layer impeller (19), wherein a circulation hole (16B) is arranged above the stator, and the insufficiently dissolved medicament re-enters the double-layer impeller (19) through the circulation hole The stirring area is stirred and dispersed again. There is a guide plate (16A) under the stator, which can stabilize the movement direction of the fluid. A hollow design is used between the sleeve (15) and the shaft (18), and the medicine in the hollow channel (17) The solution enters the drug suction chamber (20) above the double-layer impeller (19) in a spiral downward flow, and the shaft (18) drives the double-layer impeller (19) to rotate, so as to realize the continuous dispersion and mixing of the drug in the aqueous solution, and finally realize the rapid High-efficiency dissolution, the bottom of the mixing and stirring barrel is designed with a false bottom (21) to prevent the pharmaceutical aqueous solution from being directly "strained" from the discharge port (22), and several baffles (25) are arranged on the wall of the mixing and stirring barrel to eliminate "cylindrical" Rotation area" to improve the stirring performance of the stirring mechanism, and a liquid level measuring device (23) is also designed above the barrel wall; the liquid level measuring device (23) mainly includes an ultrasonic probe (23A) and a floating ball (23B). 23B) is installed in the floating ball channel (23C) on the outer edge of the baffle plate (25), the floating ball moves vertically up and down with the height of the liquid level, eliminating the influence of the liquid level fluctuation caused by the stirring action on the measurement results, the liquid level measuring device ( 23) The measured liquid level data is transmitted to the PLC intelligent control system (D). The PLC intelligent control system analyzes the data, and if it is found that the liquid level is lower than the lower limit of the set value, the inlet of the annular jet device (11) is turned on. When the liquid level is higher than the upper limit of the set value, the feeding screw pump (9) of the annular jet device (11) is stopped. During this process, the stirring mechanism (14) continues to operate, and finally Achieve efficient dissolution of pharmaceuticals.

The PLC intelligent control system (D), the liquid level measuring device (23) transmits the liquid level data of the mixing tank to the PLC intelligent control system, and the intelligent control device analyzes the data, if the liquid level is lower than the lower limit of the set value, then at the same time Turn on the electromagnetic vibration exciter (3), the star discharger (4), the screw feeder (6), the blower (7) and the feeding screw pump (9) of the annular jet device (11). Above the upper limit of the set value, stop the feeding of the electromagnetic exciter (3), star discharger (4), screw feeder (6), blower (7) and annular jet device (11) at the same time The screw pump (9) works.

To sum up, the jet-stirring coupling type powdery flocculating agent quantitative automatic adding device of the present invention fully considers the addition and dissolution characteristics of the coal slime water flocculating agent, achieves accurate and quantitative addition of liquid water and powdery agent at the same time, and has a reasonable device structure and It has the advantages of high degree of automation, which can eliminate the deviation caused by human factors in the process of material storage, transportation and addition, and at the same time ensure the efficient dispersion and dissolution of powdered chemicals in the aqueous solution, and provide good flocculation conditions for the subsequent coal slime water treatment. The reduction in consumption costs is also very significant.

Claims (3)

1. A jet-stirring coupling type powdery flocculation medicament quantitative dispersion mixing system, comprising at least an annular jet device (11), is characterized in that also comprising the following components: medicament storage system (A), medicament quantitative delivery and adding system (B), a jet-stirring coupled dispersion system (C) and a PLC intelligent control system (D); the jet-stirring coupled dispersion system (C) includes an annular jet device (11) and a stirring and dispersing device (13) ; The annular jet device (11) mainly includes a feeding screw pump (9), a pressure water pipe (10), an ejector gas pipe (27), a mixing chamber (28), a nozzle (29) and a pressure-stabilizing throat (27). 30; 28) Negative pressure is formed in the inside, and the external fluid is sucked from the ejector trachea (27), and the ejector trachea (27) is connected with the pneumatic conveying pipeline (8) of the medicament quantitative conveying and adding system (B), and the powdered medicament is pneumatically conveyed. Under the combined action of the blowing force of the pipe (8) and the suction of the mixing chamber, it enters the mixing chamber (28) of the annular jet device (11) in a dispersed state. For preliminary dispersion in water, the aqueous solution of the chemical enters the hollow channel (17) between the sleeve (15) and the shaft (18) of the stirring and dispersing device (13) through the pressure-stabilizing throat (30); the stirring and dispersing device ( 13) Including a stirring mechanism (14) and a mixing and stirring tank (24), the stirring mechanism (14) is composed of a stator (16), a sleeve (15), a shaft (18) and a double-layer impeller (19), wherein the stator (16) ) is provided with a circulation hole (16B) above, and part of the chemical aqueous solution in the mixing and stirring barrel (24) re-enters the mixing area of the double impeller (19) from the circulation hole (16B), and a guide plate (16A) is provided below the stator (16). , which can stabilize the movement direction of the fluid. The hollow design is adopted between the sleeve (15) and the shaft (18), which is the channel for the mixed material in the annular jet device (11) to enter the stirring and dispersing device (13). (17) enters the double-layer impeller (19) in a spiral downward flow, and the shaft (18) drives the double-layer impeller (19) to rotate, so as to realize the continuous dispersion, mixing and dissolution of the aqueous solution in the mixing and stirring barrel (24); the mixing The bottom of the mixing bucket (24) is designed with a false bottom (21) to prevent the aqueous solution of the chemical from being directly “strained” from the discharge port (22). "Cylindrical rotary area", a liquid level measuring device (23) is also designed above the barrel wall; the liquid level measuring device (23) mainly includes an ultrasonic probe (23A) and a floating ball (23B), and the floating ball (23B) is installed In the floating ball channel (23C) on the outer edge of the baffle, the floating ball moves vertically up and down with the liquid level, and the liquid level measuring device transmits the measured liquid level data to the PLC intelligent control system (D), which is controlled by the PLC intelligently. System (D) through data analysis, if it is found that the liquid level is lower than the lower limit of the set value, the screw pump (9) feeding the annular jet device (11) is turned on, and when the liquid level is higher than the upper limit of the set value, then The operation of the screw pump (9) feeding the annular jet device (11) is stopped, and the stirring mechanism (14) continues to operate during this process, finally realizing the efficient dissolution of the medicament. 2. A jet-stirring coupled powder flocculation agent quantitative dispersion mixing system according to claim 1, characterized in that: the agent quantitative conveying and adding system (B) is mainly composed of a screw feeder (6), A blower (7) and a pneumatic conveying pipeline (8) are composed; the screw feeder (6) includes a screw feed chute (6B), a screw push rod (6A), a variable frequency drive motor (5), and a screw push rod (6A) ) is connected with the variable frequency drive motor (5), the speed of the screw push rod (6A) is adjustable, so as to achieve the purpose of quantitatively controlling the amount of powder flocculant added. ) is connected; the power source device connected by the pneumatic conveying pipeline (8) - the blower (7), the blower (7) blows the powdery flocculating agent quantitatively fed by the screw feeder into the annular jet The ejector gas tube (27) of the device (11). 3. A jet-stirring coupling type powdery flocculating agent quantitative dispersion mixing system according to claim 1, characterized in that: the liquid level measuring device (23), the annular jet device (11) feeding The variable frequency drive motor (5) and the blower (7) of the screw pump (9), the screw feeder (6) and the blower (7) are intelligently associated by the PLC intelligent control system (D), and simultaneously start or stop actions.