A device for preparing PAM with high solubility

Abstract

The utility model discloses a PAM preparation device of high dissolving rate, including dissolving pool, agitator and diversion channel, the top of dissolving pool is equipped with roof, and diversion channel includes baffle and overflow board interval setting with baffle, and baffle is equipped with roof and is interval setting with dissolving pool bottom, and diversion channel is interval setting in dissolving pool and is divided into multiple stirring chambers. The utility model discloses a wall -hanging type ultrasonic vibration plate machine is arranged in the dissolving pool, utilizes the cavitation effect and vibration effect of ultrasonic wave, and when pam powder flows down due to gravity, just carries out dissolving fully, simultaneously adopts multiple diversion channels and forms the form of going down and going up, makes PAM in every stirring chamber after fully mixing again and is introduced into the next stirring chamber, further consolidates and improves its dissolving rate, adopts half -open type impeller in the most lower end of stirring, improves its tangential force, increases fluidity, prevents the block bigger and bigger, and blocks the flow channel between stirring chamber.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and more specifically, to a PAM preparation device with high solubility. Background Technology

[0002] When treating water at wastewater treatment plants, flocculants are added to remove impurities and ensure that the effluent meets discharge standards. Polyacrylamide (PAM) is an important water treatment flocculant, and its dissolution efficiency directly affects the wastewater treatment effect. Polyacrylamide (PAM) needs to be prepared on-site at the wastewater treatment plant by mixing and dissolving PAM powder with water in a certain proportion to prepare the PAM agent.

[0003] Currently, the industry commonly uses mechanically stirred reactors for PAM dissolution, achieving solid-liquid mixing through impeller rotation. However, traditional devices still suffer from problems such as long dissolution times and the formation of fish-eye-like clumps in practical applications, resulting in a reagent waste rate as high as 15%-30% (data source: Water Treatment Technology, No. 5, 2022).

[0004] Existing agitators mostly use straight-blade or inclined-blade designs, and the axial flow they generate dominates the mixing process, leading to the following problems: First, the tangential force is insufficient, failing to effectively break up the bottom accumulation of PAM particles, and excessive accumulation will clog the delivery pipes. Second, severe wall adhesion occurs, and the thickness of the agglomerates affects the discharge flow rate, requiring periodic shutdowns to clean the reactor, which will impact production.

[0005] The existing control scheme for agitators uses a fixed speed mode, which cannot be adjusted according to changes in the dosage and liquid level, resulting in unnecessary power consumption and waste.

[0006] Therefore, it is necessary to propose a PAM preparation device with high solubility to solve the above problems, which is of great significance to the water treatment effect. Utility Model Content

[0007] This invention provides a PAM preparation device with high solubility to solve the problem that it is difficult to achieve both aeration volume and sedimentation / separation effect in existing aeration sedimentation processes.

[0008] According to one aspect of the present invention, a high-solubility PAM preparation device is provided, installed in a flocculation tank, including a dissolving tank, a stirrer, and a flow guiding channel. The top of the dissolving tank is equipped with a top plate, and the flow guiding channel includes a baffle and an overflow plate spaced apart from the baffle. The baffle is installed on the top plate and spaced apart from the bottom of the dissolving tank, and the overflow plate is installed on the bottom plate and spaced apart from the top plate. The flow guiding channel is arranged in multiple spaced intervals within the dissolving tank to divide it into multiple stirring chambers. The stirrer is installed on the top plate of each stirring chamber, and a wall-mounted ultrasonic vibrator is installed on the side wall of the dissolving tank.

[0009] Based on the above scheme, preferably, the baffle and the bottom of the dissolving tank form an inlet, and the overflow plate and the top plate form an outlet.

[0010] Based on the above scheme, preferably, there are two flow channels, which divide the dissolving tank into a first stirring chamber, a second stirring chamber and a third stirring chamber.

[0011] Preferably, based on the above scheme, each of the mixing chambers is equipped with a stirrer, the stirrer including a motor, a stirring rod and a semi-open impeller, the output end of the motor is connected to the stirring rod, the stirring rod is equipped with stirring blades, and the semi-open impeller is installed at the end of the stirring rod and near the bottom of the dissolving tank.

[0012] Based on the above-mentioned scheme, preferably, the semi-open impeller includes an upper cover and a rotating body. The upper cover has a receiving cavity and a connecting edge formed by bending outward at the bottom. The outer edge of the upper cover has a guide hole and the bottom of the upper cover has an inlet hole. The rotating body includes a conical guide and a mounting sleeve adapted to the stirring rod, which is disposed on the guide. The guide has multiple blades, which are arranged in a spiral pattern on the outer edge of the guide. The mounting sleeve passes through the upper cover, and the blades divide the receiving cavity into multiple independent chambers, which are connected to the inlet hole and the guide hole.

[0013] Based on the above scheme, preferably, a countersunk hole is provided on the connecting edge, and a screw is installed in the countersunk hole to connect the upper cover and the dissolution pool.

[0014] Based on the above scheme, preferably, there are four guide holes, four inlet holes, and four blades.

[0015] Preferably, based on the above scheme, the end of the blade extends outward to form a locking protrusion, which can be inserted into the inlet hole.

[0016] In a preferred embodiment of the above scheme, the dissolving tank is also equipped with a liquid level sensor.

[0017] This invention discloses a high-solubility PAM preparation device. It utilizes a wall-mounted ultrasonic vibrator within the dissolution tank, leveraging the cavitation and vibration effects of ultrasound to fully dissolve the PAM powder as it flows downwards due to gravity. Simultaneously, multiple guide channels are used in a bottom-in, top-out configuration, ensuring thorough mixing of PAM in each mixing chamber before introducing it into the next, further consolidating and improving the solubility. At the bottom of the mixing chamber, PAM often clumps, forming jelly-like lumps that tend to accumulate. This invention employs a semi-open impeller to increase tangential force and fluidity, guiding these lumps towards the next mixing chamber, preventing them from growing larger and clogging the flow channels between chambers. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the high-solubility PAM preparation device of this utility model; Figure 2 This is a state diagram of the semi-open impeller of this utility model; Figure 3 This is an exploded view of the semi-open impeller of this utility model; Figure 4 This is a cross-sectional view of the upper cover of this utility model; Figure 5 This is another state diagram of the semi-open impeller of this utility model; Explanation of icon numbers: 10. Dissolving tank; 11. Top plate; 12. Mixing chamber; 13. First mixing chamber; 14. Second mixing chamber; 15. Third mixing chamber; 16. Liquid level sensor; 20. Agitator; 21. Motor; 22. Agitator rod; 23. Agitator blade; 24. Semi-open impeller; 25. Upper cover; 26. Connecting edge; 27. Countersunk hole; 28. Guide hole; 29. ​​Inlet hole; 30. Rotating body; 31. Guide body; 32. Mounting sleeve; 33. Blade; 34. Chamber; 35. Protrusion; 40. Guide channel; 41. Baffle; 42. Overflow plate; 43. Feed inlet; 44. Discharge outlet; 50. Wall-mounted ultrasonic vibrating plate machine. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0020] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.

[0021] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0022] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0023] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of this invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0026] Please see Figure 1 and combined Figure 2 and Figure 3 As shown, this utility model discloses a PAM preparation device with high solubility, which is installed in a flocculation tank and improves the PAM preparation efficiency by stirring.

[0027] The present invention provides a high-solubility PAM preparation device, which includes a dissolving tank 10, a stirrer 20, and a flow channel 40. A top plate 11 is installed on the top of the dissolving tank 10. The flow channel 40 is installed at intervals in the dissolving tank 10 to divide it into multiple stirring chambers 12. A stirrer 20 is installed on the top plate 11, and the end of the stirrer 20 extends into the stirring chamber 12.

[0028] Specifically, the flow channel 40 of this utility model includes a baffle 41 and an overflow plate 42 spaced apart from the baffle 41. The baffle 41 is installed on the top plate 11 and spaced apart from the bottom of the dissolving tank 10 to form a bottom feed port 43. The overflow plate 42 is installed on the bottom plate and spaced apart from the top plate 11 to form a discharge port 44. A wall-mounted ultrasonic vibrating plate machine 50 is installed on the side wall of the dissolving tank 10.

[0029] like Figure 1 As shown, for ease of explanation, in the first embodiment of this utility model, there are two flow channels 40, which divide the dissolving tank 10 into a first stirring chamber 13, a second stirring chamber 14 and a third stirring chamber 15.

[0030] In use, the PAM agent is introduced into the first mixing chamber 13. The strong vibration of the ultrasound promotes the rapid dissolution of PAM. The wall-mounted ultrasonic vibrator 50 has a dynamic adjustment range of ultrasonic frequency of 20-40kHz and a power density gradient distribution design (1.2-1.5W / cm² in the bottom area and 0.3-0.5W / cm² in the top area). The mixture is then stirred by the stirrer 20 for initial mixing. After mixing and dissolving in the first mixing chamber 13, the PAM agent has been fused by more than 50%. The dissolved liquid enters the inlet 43 of the first mixing chamber 13 and then enters the second mixing chamber 14 through the outlet 44 at the top. The second mixing chamber 14 is stirred and dissolved a second time by the stirrer 20. At this time, the PAM agent is 90% dissolved. Finally, it enters the second mixing chamber 14 to achieve 100% dissolution.

[0031] In order to prevent PAM agent from accumulating at the bottom during the dissolution process, this invention installs a stirrer 20 in each of the stirring chambers 12. The stirrer 20 includes a motor 21, a stirring rod 22 and a semi-open impeller 24. The output end of the motor 21 is connected to the stirring rod 22. The stirring rod 22 is equipped with stirring blades 23. The semi-open impeller 24 is installed at the end of the stirring rod 22 and close to the bottom of the dissolution tank 10.

[0032] like Figure 2As shown, the semi-open impeller 24 of this utility model includes an upper cover 25 and a rotating body 30. The upper cover 25 has a receiving cavity inside, and a connecting edge 26 is formed by bending outward at the bottom of the upper cover 25. A guide hole 28 is provided on the outer edge surface of the upper cover 25, and an inlet hole 29 is provided at the bottom of the upper cover 25. The rotating body 30 includes a conical guide body 31 and an mounting sleeve 32 adapted to the stirring rod on the guide body 31. A plurality of blades 33 are provided on the guide body 31, and the blades 33 are arranged in a spiral pattern on the outer edge surface of the guide body 31. The mounting sleeve 32 passes through the upper cover 25. The blades 33 divide the receiving cavity into a plurality of independent chambers 34, and the plurality of independent chambers 34 are connected to the inlet hole 29 and the guide hole 28.

[0033] In use, when the stirring rod 22 drives the semi-open impeller 24 to rotate, it will cause the bottom inlet hole 29 to guide the PAM agent at the bottom into multiple independent chambers 34. These independent chambers 34 are connected to the inlet hole 29 and the guide hole 28, so that the PAM agent at the bottom passes through the chamber 34 and is then output from the multiple guide holes 28. By allowing the agents to mix independently, a vortex is formed, thereby improving the mixing and dissolution efficiency. Please refer to [link to relevant documentation]. Figure 5 and Figure 3 As shown.

[0034] It is worth noting that the connecting edge 26 of this utility model is provided with a countersunk hole 27, and a screw is installed in the countersunk hole 27 to connect the upper cover 25 and the dissolving pool 10.

[0035] Furthermore, to improve the separation effect and consolidate the mixing efficiency, this utility model has four guide holes 28, four inlet holes 29, and four blades 33. Alternatively, three or five guide holes 28 can be provided, with the number of inlet holes 29 matching the number of guide holes 28. For specific structure details, please refer to [link / reference]. Figure 3 , Figure 4 As shown.

[0036] Furthermore, the end of the blade 33 of this invention extends outward to form a locking protrusion 35, which can be inserted into the inlet hole 29.

[0037] This utility model also includes a liquid level sensor 16 installed in the dissolving tank 10. The liquid level sensor is divided into a low liquid level sensor 16, a medium liquid level sensor 16, and a high liquid level sensor 16. It is also equipped with a frequency converter, which can control the speed of the motor 21.

[0038] When the liquid level is lower than the high liquid level sensor 16, the speed of the motor 21 in the first stirring chamber 13, the second stirring chamber 14 and the third stirring chamber 15 is increased by increasing the frequency of the frequency converter.

[0039] When the liquid level is lower than the middle liquid level sensor 16, the frequency of the inverter is increased again to increase the speed of the motor 21 in the first stirring chamber 13, the second stirring chamber 14 and the third stirring chamber 15, so as to achieve the purpose of thorough stirring.

[0040] This invention discloses a high-solubility PAM preparation device. A wall-mounted ultrasonic vibrator 50 is installed within the dissolution tank 10. Utilizing the cavitation effect and vibration of ultrasound, the PAM powder is fully dissolved as it flows downwards due to gravity. Simultaneously, a guide channel 40 forms a bottom-in, top-out flow, ensuring thorough mixing of the PAM in each stirring chamber 12 before introducing it into the next, further consolidating and improving the solubility. At the bottom of the stirring chamber, PAM often clumps, forming jelly-like lumps that tend to accumulate. This invention employs a semi-open impeller 24 to increase tangential force and fluidity, guiding these lumps towards the next stirring chamber 12, preventing them from growing larger and clogging the flow channels between the chambers. Compared to existing technologies, this invention has the following advantages: 1. Improved dissolution efficiency: Ultrasonic cavitation increases the dispersion speed of PAM particles.

[0041] 2. Molecular structure protection: Reduce molecular loss rate through frequency control.

[0042] 3. Energy consumption optimization: Optimized sound field distribution reduces energy consumption per unit processing volume, and variable frequency control of stirring and ultrasonic equipment improves efficiency.

[0043] 4. Ease of operation: The wall-mounted structure avoids the problem of needing to drain and maintain traditional bottom-mounted ultrasonic equipment.

[0044] 5. Increased tangential force reduces PAM buildup at the bottom.

[0045] Finally, the method described in this application is merely a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A PAM preparation device with high solubility, installed in a flocculation tank, characterized in that, The system includes a dissolving tank, a stirrer, and flow channels. The dissolving tank has a top plate. The flow channels include baffles and overflow plates spaced apart from the baffles. The baffles are mounted on the top plate and spaced apart from the bottom of the dissolving tank. The overflow plates are mounted on the bottom plate and spaced apart from the top plate. Multiple flow channels are spaced within the dissolving tank, dividing it into multiple stirring chambers. The stirrer is mounted on the top plate of each stirring chamber. A wall-mounted ultrasonic vibrator is mounted on the side wall of the dissolving tank. The baffles and the bottom of the dissolving tank form an inlet, and the overflow plates and the top plate form an outlet. There are two flow channels, dividing the dissolving tank into a first stirring chamber, a second stirring chamber, and a third stirring chamber. Each stirring chamber contains a stirrer, which includes a motor, a stirring rod, and a semi-open impeller. The output end of the motor is connected to the stirring rod, which has stirring blades. The semi-open impeller is mounted at the end of the stirring rod near the bottom of the dissolving tank.

2. The PAM preparation apparatus with high solubility as described in claim 1, characterized in that, The semi-open impeller includes an upper cover and a rotating body. The upper cover has a receiving cavity and a connecting edge formed by bending outward at the bottom. The outer edge of the upper cover has a guide hole, and the bottom of the upper cover has an inlet hole. The rotating body includes a conical guide body and a mounting sleeve adapted to the stirring rod, which is mounted on the guide body. The guide body has multiple blades, which are arranged in a spiral pattern on the outer edge of the guide body. The mounting sleeve passes through the upper cover. The blades divide the receiving cavity into multiple independent chambers. The guide channel connects the inlet hole and the guide hole.

3. The PAM preparation apparatus with high solubility as described in claim 2, characterized in that, A countersunk hole is provided on the connecting edge, and a screw is installed in the countersunk hole to connect the upper cover and the dissolution pool.

4. The PAM preparation apparatus with high solubility as described in claim 2, characterized in that, There are four flow guide holes, four inlet holes, and four blades.

5. The PAM preparation apparatus with high solubility as described in claim 2, characterized in that, The end of the blade extends outward to form a locking protrusion, which can be inserted into the inlet hole.

6. The PAM preparation apparatus with high solubility as described in claim 1, characterized in that, The dissolving tank is also equipped with a liquid level sensor.

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