A kind of medicament fully stirred mixing device for phosphorus-containing wastewater treatment

Abstract

The application discloses a medicament full-stirring mixing device for phosphorus-containing wastewater treatment, which comprises multiple medicament tanks arranged side by side, medicament stirrers arranged on the top of the medicament tanks and used for stirring medicaments in the medicament tanks, medicament conveying pipelines connected with pressurized nozzles, and wastewater treatment tanks communicated with the output ends of the pressurized nozzles; the outer side of a prismatic treatment tank of the wastewater treatment tank is arranged with cylindrical structures staggeredly, and the coupling thereof is approximately a reverse Tesla valve structure, and the medicament stirrers are installed at the center of the cylindrical structures. The medicament stirrers with variable stirring ranges are installed above the cylindrical structures, so that the problem of insufficient stirring caused by the fixed and unchangeable stirring position and radius is solved, and the pressurized nozzles with multiple medicament output points are arranged to improve the mixing speed of the medicaments and the wastewater. The application has the characteristics of good wastewater flow performance and good stirring and mixing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment devices, in particular to a medicament full-stirring mixing device for phosphorus-containing wastewater treatment. BACKGROUND

[0002] In various wastewater treatment processes, the use of chemical precipitation method is the most widely used, the main principle is to add calcium oxide medicament to wastewater, so that it reacts with dissolved salts in wastewater to generate substances insoluble in water, and finally removed in the form of precipitate. However, after the wastewater enters the treatment tank, due to the structure and space limitation of the cylindrical or prismatic wastewater treatment tank, the device has the problems of poor wastewater flow and poor mixing effect of wastewater and medicament.

[0003] In addition, the stirring blades of the existing stirrers are fixed, and the stirring position and radius remain unchanged during the stirring process, such as a wastewater treatment stirring tank (CN111729398A). This stirring method is more suitable for cylindrical stirring tanks, but not suitable for engineering prismatic stirring tanks, and there are stirring dead angles in the stirring process, which leads to insufficient stirring and mixing of wastewater and medicament, and the stirring device has the problem of poor stirring effect. SUMMARY

[0004] In order to overcome the above technical problems, the purpose of the present application is to provide a medicament full-stirring mixing device for phosphorus-containing wastewater treatment, which has the characteristics of good wastewater flow and good stirring and mixing effect.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0006] A medicament full-stirring mixing device for phosphorus-containing wastewater treatment, comprising a plurality of medicament tanks arranged side by side, a medicament stirrer arranged on the top of the medicament tank for stirring the medicament in the medicament tank, and a medicament delivery pipeline connecting the medicament tank with a pressurized nozzle, wherein the output end of the pressurized nozzle is connected with a wastewater treatment tank.

[0007] The outer side of the prismatic treatment tank of the wastewater treatment tank is arranged with a cylindrical structure in a staggered manner, and the coupling is approximately in the form of a reverse Tesla valve, and the medicament stirrer is installed at the center of the cylindrical structure.

[0008] The medicament stirrers are symmetrically and staggeredly arranged on the wastewater treatment tank, and the distance between two adjacent medicament stirrers satisfies the following relationship:

[0009] x direction: 2r m ≤d2≤3r m

[0010] y direction: 2r m ≤d1≤D

[0011] Where r m The maximum stirring radius is D, and the width of the wastewater treatment tank is D. The cylindrical structures extend along the 145° and 115° directions respectively and are connected to the prism-shaped tank wall.

[0012] A metering pump is installed on the reagent tank, and the reagent in the reagent tank is quantitatively delivered to multiple pressurized nozzles through a reagent delivery pipeline. Then, the reagent flows into the wastewater treatment tank from the outlet of the multiple pressurized nozzles. The pressurized nozzles are arranged at the reagent agitator.

[0013] The pharmaceutical delivery pipeline and pressurized nozzle are made of polyvinyl chloride to ensure the pipeline's resistance to acid, alkali and corrosion.

[0014] The pressurized nozzle is installed above the wastewater treatment tank, and the diameter of the nozzle's outlet is smaller than the diameter of the chemical delivery pipe. This accelerates the chemical outflow and improves the mixing effect between the chemical and the wastewater.

[0015] In order to achieve thorough mixing of phosphorus-containing wastewater and reagents, the mixing range of the reagent mixer is variable, and the motor and reducer used for mixing are fixed above the wastewater treatment tank by a fixed support.

[0016] The fixed support includes an upper annular disk and a lower annular disk. A motor and a reducer are installed on the upper annular disk. The output end of the motor and reducer is connected to the top of the stirring center shaft through a flange coupling. The end of the stirring center shaft is connected to a blade fixing seat. The two are mechanically fixed together, thereby driving the stirring blade to rotate.

[0017] A linear bearing is installed on the mixing center shaft. A tension spring is installed between the linear bearing and the top of the mixing center shaft, and a compression spring is installed between the linear bearing and the blade mounting seat.

[0018] Three sets of stirring devices are equally spaced between the blade fixing seat and the movable slider.

[0019] The stirring device includes stirring blades, the upper and lower ends of which are connected to one end of two connecting rods, and the other ends of the upper and lower connecting rods are respectively hinged to a movable slider and a blade fixing seat.

[0020] The stirring blades are evenly distributed along the stirring center axis in the horizontal plane, with an angle of 120 degrees between every two sets of stirring blades. The angle between the stirring blades and the stirring center axis in the vertical plane is degrees. The inclined blades are used to reduce the wastewater resistance of the stirring device at startup.

[0021] The linear bearing is installed in the movable slider, and the movable slider slides up and down along the stirring central shaft, and the up and down distance of the movable slider is limited by the tension spring and the compression spring respectively.

[0022] One end of the movable slider is connected with the tension spring, and the other end is connected with the compression spring, and the end of the compression spring is connected with the blade fixing seat.

[0023] The thrust bearing is installed in the middle of the lower annular disc, and the thrust bearing is used to limit the axial up and down movement of the stirring central shaft.

[0024] The wastewater treatment tank increases the flow path length of wastewater in a limited space, and makes the wastewater collide with the wall of the wastewater treatment tank, so that the mixing effect of wastewater and medicament is improved.

[0025] The rotation direction of the medicament stirrer and the space structure of the wastewater treatment tank cooperate with each other, so that the wastewater liquid flows in an S shape in the wastewater treatment tank, and the mixing effect of wastewater and medicament is improved through stirring and collision of liquid and tank wall.

[0026] The beneficial effects of the present application are:

[0027] The wastewater treatment tank adopts the structure of the reverse Tesla valve, utilizes the characteristics of the Tesla valve that the liquid is positively conducted and negatively hindered, increases the flow path length of wastewater in a limited space, and increases the collision effect of the liquid and the tank wall. The stirring devices are symmetrically staggered in the wastewater treatment tank to avoid mutual interference between the stirring blades during stirring. Through liquid stirring and collision of wastewater and tank wall, the mixing rate of wastewater and medicament is accelerated and the mixing effect is improved.

[0028] A stirring device with variable stirring range is designed, and the position and radius of the stirring blade in the device can change according to the size of the centrifugal force received during rotation. The upper and lower ends of the stirring blade are respectively hinged to the blade fixing seat and the movable slider through the connecting rod, and the blade fixing seat is fixed on the stirring central shaft to ensure the synchronous and same direction rotation of the stirring blade and the stirring central shaft. The movable slider can move up and down along the central shaft of the stirrer, and the moving distance is limited by the spring. When the movable slider moves upward, the stirring position of the stirring blade becomes higher, and the stirring radius becomes larger. Conversely, the stirring position of the stirring blade becomes lower, and the stirring radius becomes smaller. The variable stirring range avoids the stirring dead angle, so that the wastewater and medicament are fully stirred, and the stirring and mixing effect is improved.

[0029] A plurality of medicament pressurized nozzles are distributed, medicament nozzles are added at multiple stirring positions in the wastewater treatment tank according to the number of stirring devices, the cross-sectional area of the medicament outlet is reduced, the outlet flow rate of the medicament is accelerated, the medicament is sprayed into the wastewater, and the mixing effect of the wastewater and the medicament is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of a medicament fully stirred mixing device for phosphorus-containing wastewater treatment.

[0031] Figure 2 is a schematic diagram of a stirring device with variable stirring range.

[0032] Figure 3 is a sectional view of a medicament fully stirred mixing device.

[0033] Figure 4 is a schematic diagram of the stirring range of a stirring device.

[0034] Figure 5 is a simulation schematic diagram of a wastewater treatment tank based on a reverse Tesla valve.

[0035] Figure 6 is a simulation schematic diagram of medicament pressurized nozzle flow rate.

[0036] Reference signs:

[0037] 1 - fixed frame, 2 - medicament tank, 3 - medicament stirrer, 4 - metering pump, 5 - medicament delivery pipeline, 6 - medicament pressurized nozzle, 7 - support, 8 - wastewater treatment tank, 9 - motor and reducer, 10 - fixed support, 11 - flange coupling, 12 - stirring central shaft, 13 - tension spring, 14 - linear bearing, 15 - stirring blade, 16 - connecting rod, 17 - blade fixing seat, 18 - compression spring, 19 - movable sliding block, 20 - thrust bearing. DETAILED DESCRIPTION

[0038] The application will be further described in detail below in conjunction with examples.

[0039] The application aims to design a medicament fully stirred mixing device for phosphorus-containing wastewater treatment, the overall structure of which is shown in Figure 1 Three medicament tanks 2 are fixed on the fixed frame 1 and kept stationary, the medicament in the tanks is stirred uniformly by the medicament stirrer 3, then pumped quantitatively to the medicament delivery pipeline 5 through the metering pump 4, and then sprayed into the wastewater treatment tank 8 from the medicament pressurized nozzle 6, wherein the pipeline is fixed by the support 7 to realize stable delivery of the medicament. The medicament delivery pipeline and the pressurized nozzle are made of polyvinyl chloride material to ensure the acid resistance, alkali resistance and corrosion resistance of the pipeline.

[0040] In order to realize the full stirring of phosphorus-containing wastewater and medicament, the mixing and stirring device is designed to have a variable stirring range, and the structure is as shown in Figure 2The motor and reducer 9 for stirring is fixed above the wastewater treatment tank 8 by the fixed support 10. The motor output transmits power to the stirring central shaft 12 through the flange coupling 11. The thrust bearing 20 is installed between the stirring central shaft 12 and the fixed support 10 to limit the axial movement. The stirring central shaft 12 is connected with the blade fixing seat 17, and the two are mechanically fixed, thereby driving the stirring blade 15 to rotate. The upper and lower ends of the stirring blade 15 are respectively hinged with the blade fixing seat 17 and the movable slider 19 through the connecting rod 16. The linear bearing 14 is installed in the movable slider 19, which can slide up and down along the stirring central shaft 12, and the sliding up and down distance is limited by the extension spring 13 and the compression spring 18. When the movable slider 19 moves up and down, the stirring blade 15 also moves up and down, and the stirring radius also changes.

[0041] The cross-sectional view of the medicament fully stirring and mixing device is shown in Figure 3 The phosphorus-containing wastewater enters from the wastewater input pipe A and flows out from the wastewater output pipe B. The medicament pressurized nozzle 6 is arranged in a multi-point distribution manner at each stirring device to maximize the mixing effect of the medicament and the wastewater. The stirring devices are symmetrically staggered on the wastewater treatment tank 8, and the distance between adjacent two stirring devices satisfies the following relationship:

[0042] x direction: 2r m ≤d2≤3r m

[0043] y direction: 2r m ≤d1≤D

[0044] wherein r m is the maximum stirring radius, and D is the width of the wastewater treatment tank 8.

[0045] Then, the cylindrical structure of the wastewater treatment tank extends along the directions of 145° and 115° respectively and is connected with the prismatic tank wall. After the size constraint, the rotational movement of the stirring device makes the wastewater present S-shaped flow in the direction indicated by the dotted arrow, thereby improving the flow speed of the wastewater in the limited space while fully stirring and mixing the phosphorus-containing wastewater and the medicament.

[0046] The stirring range change diagram of the stirring device is shown in Figure 4 The movement of the movable slider 19 is non-active, mainly depending on the centrifugal force when the stirring blade 15 rotates. When the movable slider 19 moves up and down, the upper extension spring 13 contracts or the lower compression spring 18 is compressed, limiting the upward movement distance h1 or the downward movement distance h2. At the same time, the stirring radius of the stirring blade 15 decreases to r1 when the movable slider 19 moves upward, and increases to r2 when the movable slider moves downward.

[0047] After setting appropriate parameters, the qualitative flow simulation result of the wastewater in the wastewater treatment tank is as followsFigure 5 The structure of the wastewater treatment tank adopts a simple reverse Tesla valve structure. The stirring time of the wastewater is increased in the limited space, and the arrangement of the stirring device is facilitated, and the stirring blades are prevented from interfering with each other. In addition, the coupling structure of the circular and square shapes makes the wastewater collide with the wall of the wastewater treatment tank, thereby improving the mixing effect of the wastewater and the medicament.

[0048] The qualitative simulation results of the flow rate of the wastewater in the medicament pressurized nozzle are as shown in the figure Figure 6 When the pipe flow is constant, the pipe diameter is inversely proportional to the flow rate. Therefore, reducing the cross-sectional area at the medicament outlet increases the outlet flow rate of the medicament, so that the medicament is sprayed into the wastewater, thereby increasing the mixing rate with the wastewater.

[0049] The working principle of the present application is as follows:

[0050] In view of the problems of poor wastewater flow and poor mixing effect of wastewater and medicament caused by the structure and space limitation of the existing circular or square wastewater and medicament mixing tank, the wastewater treatment tank 8 is designed in the form of a reverse Tesla valve structure. The reverse Tesla valve has the characteristics of forward conduction and reverse resistance to liquid. The length of the flow path of the wastewater is increased in the limited space. At the same time, the stirring device is arranged symmetrically and staggered in the wastewater treatment tank. The rotating direction of the stirrer and the spatial structure of the wastewater treatment tank cooperate with each other, so that the wastewater liquid flows in an S shape in the treatment tank. Through stirring and collision of the liquid with the tank wall, the mixing rate of the wastewater and the medicament is increased and the mixing effect of the two is improved.

[0051] In view of the problem of insufficient stirring caused by the fixed stirring position and radius of the existing stirring device, a stirring device with variable stirring range is designed. The position and radius of the stirring blade 15 of the stirring device can change according to the size of the centrifugal force received during rotation. The upper and lower ends of the stirring blade 15 are respectively hinged to the blade fixed seat 17 and the movable sliding block 19 through the connecting rods 16. The centrifugal force received by the stirring blade 15 and the tension of the two connecting rods form a three-force balance. When the blade speed increases and the centrifugal force becomes larger, according to the three-force balance condition, the angle between the tensions of the two connecting rods becomes smaller, the movable sliding block 19 moves downward, the stirring blade position becomes lower and the stirring radius becomes larger, and vice versa. The stirring blade position becomes higher and the stirring radius becomes smaller. The design of this stirring device can fully stir the wastewater and the medicament in the wastewater treatment tank 8, and improve the stirring and mixing effect.

[0052] In view of the problem of poor mixing effect of wastewater and medicament caused by the single output channel of the existing medicament pipeline, a multi-point distributed medicament pressurized nozzle is adopted. According to the relationship between the liquid flow, flow rate and pipe diameter, the cross-sectional area at the medicament outlet is reduced to increase the outlet flow rate of the medicament, so that the medicament is sprayed into the wastewater, thereby increasing the mixing rate with the wastewater and improving the mixing effect of the wastewater and the medicament.

Claims

1. A medicament thoroughly stirring mixing device for phosphorus-containing wastewater treatment, characterized by, The utility model provides a kind of wastewater treatment device, including and side by side arrangement multiple medicament tank (2), the medicament tank (2) top is provided for stirring medicament in medicament tank (2) medicament stirrer (3), medicament tank (2) is connected with pressurized nozzle (6) by medicament delivery pipeline (5), the output end of the pressurized nozzle (6) communicates waste water treatment tank (8); The outer side of the prismatic treatment tank of waste water treatment tank (8) is staggered with cylindrical structure, and the two are coupled as the structure form of inverse Tesla valve, and the medicament stirrer (3) is installed in the center of the cylindrical structure; The medicament stirrer (3) is symmetrically staggered on the waste water treatment tank (8), and the distance between the two adjacent medicament stirrers (3) satisfies the following relationship: x direction: 2r m ≤ d2≤ 3r m y direction: 2r m ≤d1≤D where r m is the maximum stirring radius, D is the width of the wastewater treatment tank (8); the cylindrical structures extend along 145° and 115° directions, respectively, and are connected to the prismatic tank walls; The medicament stirrer (3) includes a fixed support (10), the fixed support (10) includes an upper annular disc and a lower annular disc, a motor and a reducer (9) are installed on the upper annular disc, the output end of the motor and the reducer (9) is connected with the top end of a stirring central shaft (12) through a flange coupling (11), and the end of the stirring central shaft (12) is connected with a blade fixed seat (17); A linear bearing (14) is installed on the stirring central shaft (12), a tension spring (13) is arranged between the linear bearing (14) and the top end of the stirring central shaft (12), and a compression spring (18) is arranged between the linear bearing (14) and the blade fixed seat (17); Three groups of stirring devices are arranged at equal intervals between the blade fixed seat (17) and a movable sliding block (19); The stirring device includes stirring blades (15), the upper and lower ends of the stirring blades (15) are connected with one end of two connecting rods (16), and the other end of the upper and lower connecting rods (16) is hingedly connected with the movable sliding block (19) and the blade fixed seat (17) respectively.

2. The device for fully mixing the agent for treating phosphorus-containing wastewater according to claim 1, characterized in that, A metering pump (4) is arranged on the medicament tank (2), and the pressurized nozzle (6) is arranged at the medicament stirrer (3).

3. The device for fully mixing the agent for treating phosphorus-containing wastewater according to claim 1, characterized in that, The pressurized nozzle (6) is installed above the waste water treatment tank (8), and the diameter of the medicament outlet of the pressurized nozzle (6) is smaller than the diameter of the medicament delivery pipeline 5.

4. The device for fully mixing the agent for treating phosphorus-containing wastewater according to claim 1, characterized in that, The stirring blades (15) are uniformly distributed in the horizontal plane around the stirring central shaft (12), the included angle between every two groups of stirring blades (15) is 120 degrees, and the included angle between the stirring blades (15) and the stirring central shaft (12) in the vertical plane is 15 degrees.

5. The device for fully mixing the agent for treating phosphorus-containing wastewater according to claim 1, characterized in that, The movable sliding block (19) is internally provided with a linear bearing (14), and the movable sliding block (19) slides up and down along the stirring central shaft (12) inside, and the up and down sliding distance of the movable sliding block (19) is limited by the tension spring (13) and the compression spring (18) respectively.

6. The medicament fully stirred mixing device for phosphorus-containing wastewater treatment according to claim 1, characterized in that, A thrust bearing (20) is installed in the middle of the lower annular disc, and the thrust bearing (20) is used to limit the axial up and down movement of the stirring central shaft (12).

7. The device for fully mixing the agent for treating phosphorus-containing wastewater according to claim 1, characterized in that, The rotation direction of the medicament stirrer (3) and the spatial structure of the waste water treatment tank (8) cooperate with each other, so that the waste water liquid flows in an S shape in the waste water treatment tank (8).

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