Powder-liquid dispersing and mixing device

Abstract

The utility model discloses a powder liquid dispersing and mixing device which comprises a dry powder hopper, a transition hopper, an air heater and a dissolving tank, a spiral feeder is connected to an outlet of the dry powder hopper, the transition hopper is communicated with the output end of the spiral feeder, and the output end of the transition hopper is communicated with a dry powder feeding pipe. The hot-air blower is connected to the transition hopper and communicates with an inner cavity of the transition hopper, the hot-air blower is used for heating and pressurizing the inner cavity of the transition hopper, and the dissolving tank communicates with the transition hopper through a dry powder feeding pipe. According to the utility model, the blanking amount can be accurately controlled, powdery polyacrylamide in the hopper is prevented from being affected with damp, caking and blocking the blanking port, the preparation concentration of a polyacrylamide solution can be accurately controlled, the polyacrylamide solution is completely dissolved, and the phenomena of particles and caking are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of industrial raw material mixing equipment, specifically relating to a powder-liquid dispersion and mixing device. Background Technology

[0002] The clarification wastewater generated during soda ash production requires the addition of polyacrylamide flocculant. After clarification, the suspended solids must reach below 60 mg / L to meet discharge standards. Powdered polyacrylamide needs to be dissolved to prepare a solution of a certain concentration before being added to the clarification wastewater and thoroughly mixed. By precisely controlling the concentration and dosage of the flocculant, the amount of flocculant used can be reduced while ensuring clarification effectiveness. The dissolution process of the flocculant directly determines the final performance; therefore, the dissolution of the flocculant is crucial.

[0003] Currently, polyacrylamide swelling devices use a belt-driven toothed feeder to directly feed powdered polyacrylamide into the dissolving tank. The powdered polyacrylamide is added manually at adjustable speed, and water is introduced via a manual valve. The polyacrylamide and water are then mixed in the dissolving tank. Existing polyacrylamide swelling devices have the following problems: 1. Wear on the toothed feeder results in large gaps between the teeth, making precise control of the feed rate impossible; 2. The hopper is directly connected to the dissolving tank, making the powdered polyacrylamide susceptible to moisture absorption due to humidity, severely affecting the swelling process and causing clumping at the feed inlet, clogging the inlet; 3. After entering the dissolving tank, the polyacrylamide is poorly dispersed, forming clumps that float in the tank, frequently clogging the tank, pump, and pipelines; 4. The manual water valve and operator-based speed control of polyacrylamide addition lead to unstable concentrations, sometimes exceeding safe levels. This not only results in high polyacrylamide consumption but also affects the clarification effect in the clarification tank, creating difficulties for subsequent environmentally friendly wastewater discharge. Therefore, to avoid the shortcomings of the existing technology, it is necessary to improve it. Utility Model Content

[0004] The purpose of this invention is to provide a powder-liquid dispersion and mixing device that can precisely control the feed rate, prevent the powdered polyacrylamide in the hopper from becoming damp and clumping, thus blocking the feed port. It can also precisely control the concentration of the polyacrylamide solution, ensuring complete dissolution without particles or lumps.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A powder-liquid dispersion and mixing device includes a dry powder hopper, a transition hopper, a hot air blower, and a dissolving tank. A screw feeder is connected to the outlet of the dry powder hopper. The transition hopper is connected to the output end of the screw feeder, and the output end of the transition hopper is connected to a dry powder feed pipe. The hot air blower is connected to the transition hopper and communicates with its inner cavity. The hot air blower is used to heat and pressurize the powder in the transition hopper for conveying. The dissolving tank is connected to the transition hopper through the dry powder feed pipe.

[0007] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, a dispersion device is connected to one end of the dry powder feed pipe near the dissolving tank. The dispersion device is connected to the dissolving tank and is also connected to a liquid inlet pipe.

[0008] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, the inner wall of the dispersion device is provided with a nozzle, and the nozzle is connected to the liquid inlet pipe.

[0009] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, the powder-liquid dispersion and mixing device is automatically controlled by a DCS control system, and the DCS control system is electrically connected to the screw feeder.

[0010] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, the inlet pipe is equipped with a regulating valve for adjusting the water output of the inlet pipe and a flow meter for monitoring the water flow rate of the inlet pipe, and the regulating valve and the flow meter are electrically connected to the DCS control system.

[0011] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, the dry powder hopper is equipped with a level sensor for monitoring the internal material level of the dry powder hopper, and the level sensor is electrically connected to the DCS control system.

[0012] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, the transition hopper is equipped with an alarm probe for monitoring the blockage of the transition hopper, and the alarm probe is electrically connected to the DCS control system.

[0013] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, the powder-liquid dispersion and mixing device is automatically controlled by a DCS control system, which is electrically connected to the regulating valve, the flow meter, the level sensor, the alarm probe and the screw feeder respectively.

[0014] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, a vibration motor is installed on the dry powder hopper.

[0015] As a preferred embodiment of the above-mentioned powder-liquid dispersion and mixing device, the dissolving tank is a three-chamber dissolving tank.

[0016] The advantages of implementing the powder-liquid dispersion and mixing device provided by this utility model compared with the prior art are as follows:

[0017] This utility model relates to a dry powder hopper for storing powdered polyacrylamide. The dry powder hopper is located far from the dissolving tank, avoiding the direct connection that could cause the powdered polyacrylamide to become damp and clump. By indirectly connecting the dry powder hopper to the dissolving tank, the hopper remains dry. A screw feeder is connected to the outlet of the dry powder hopper for quantitative and stable conveying of the powdered material, allowing for precise control of the discharge amount each time. A transition hopper is connected to the output end of the screw feeder, enabling the screw feeder to convey a fixed amount of powdered polyacrylamide to the transition hopper. A hot air blower is connected to the transition hopper and operates within the transition hopper. The inner cavities of the hoppers are interconnected. After being heated by a hot air blower, the transition hopper can effectively prevent the powder from clumping due to moisture and adhering to the outlet of the screw feeder. Powdered polyacrylamide enters the transition hopper after being metered by the screw feeder. The hot air blower pressurizes the transition hopper, and the metered powdered polyacrylamide in the transition hopper is transported to the dissolving tank through the dry powder feed pipe for dissolution and subsequent processes. The powder-liquid dispersion and mixing device feeds the material through the screw feeder, transition hopper and hot air blower, so that the feeding amount can be accurately controlled. Moreover, by keeping the dry powder hopper away from the dissolving tank, the material is prevented from being affected by moisture and becoming damp due to direct connection between the dry powder hopper and the dissolving tank. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0019] Figure 1 This is a schematic diagram of the powder-liquid dispersion and mixing device of this utility model.

[0020] Marked in the image:

[0021] 100. Dry powder hopper; 110. Level gauge; 120. Vibrating motor; 200. Screw feeder; 300. Transition hopper; 310. Alarm probe; 400. Hot air blower; 500. Dry powder feed pipe; 600. Dispersing device; 610. Nozzle; 620. Liquid inlet pipe; 630. Regulating valve; 640. Flow meter; 700. Dissolving tank; 800. DCS control system. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Please refer to the following: Figure 1 The powder-liquid dispersion and mixing device provided in the embodiments of this utility model will now be described.

[0027] like Figure 1 As shown, the powder-liquid dispersion and mixing device of this utility model includes a dry powder hopper 100, a transition hopper 300, a hot air blower 400, and a dissolving tank 700. A screw feeder 200 is connected to the outlet of the dry powder hopper 100. The transition hopper 300 is connected to the output end of the screw feeder 200, and the output end of the transition hopper 300 is connected to a dry powder feed pipe 500. The hot air blower 400 is connected to the transition hopper 300 and communicates with the inner cavity of the transition hopper 300. The hot air blower 400 is used to heat and pressurize the powder in the transition hopper 300 for conveying. The dissolving tank 700 is connected to the transition hopper 300 through the dry powder feed pipe 500.

[0028] The dry powder hopper 100 is independently separated and far away from the dissolving tank 700, so that the powdered polyacrylamide stored in the dry powder hopper 100 will not be affected by the moisture in the dissolving tank 700 and will not get damp. The screw feeder 200 can quantitatively transport the powdered material. Together with the transition hopper 300 and the hot air blower 400, the powder in the dry powder hopper 100 is transported to the dissolving tank 700, which is far away from the dry powder hopper 100.

[0029] For example, a dispersing device 600 is connected to one end of the dry powder feed pipe 500 near the dissolving tank 700. The dispersing device 600 is connected to the dissolving tank 700 and is also connected to a liquid inlet pipe 620. Powdered polyacrylamide is conveyed to the dispersing device 600. The dispersing device 600 is connected to the liquid inlet pipe 620, which sprays water into the dispersing device 600. This allows the powdered polyacrylamide to be fully dispersed and mixed with the water sprayed from the liquid inlet pipe 620 within the dispersing device 600. By dispersing and mixing the powdered polyacrylamide through the dispersing device 600, it is effectively prevented from being added directly to the dissolving tank 700. Insufficient dissolution and dispersion can lead to powder clumping and floating in the tank, affecting the dissolution effect and clogging the dissolving tank 700. The powdered polyacrylamide is blown to the dispersing device 600 by hot air, where it is fully mixed with the liquid sprayed from the nozzle 610. After being stirred in the three-chamber dissolving tank 700, it is completely dissolved without any particles or lumps. Precise control of the amount of polyacrylamide fed and its complete dissolution ensures accurate control of the solution concentration, thereby guaranteeing the environmentally friendly treatment effect of the subsequent waste liquid and reducing treatment costs.

[0030] For example, the inner wall of the dispersing device 600 is provided with a nozzle 610, which is connected to the liquid inlet pipe 620. The nozzle 610 sprays water from the liquid inlet pipe 620 to disperse the powdered polyacrylamide in the dispersing device 600, thereby improving the dispersion and mixing effect of the powdered polyacrylamide.

[0031] For example, the powder-liquid dispersion and mixing device is automatically controlled by a DCS control system 800, which is electrically connected to the screw feeder 200.

[0032] For example, the inlet pipe 620 is equipped with a regulating valve 630 for adjusting the water output of the inlet pipe 620 and a flow meter 640 for monitoring the water flow of the inlet pipe 620. The regulating valve 630 and the flow meter 640 are electrically connected to the DCS control system 800. The flow of the inlet pipe 620 is monitored by the flow meter 640, and the regulating valve 630 is adjusted according to the required flow to adjust the water output of the inlet pipe 620, so that the inlet pipe 620 can ensure a stable and appropriate amount of water enters the dispersion device 600 to fully disperse and mix with the powdered polyacrylamide.

[0033] For example, the dry powder hopper 100 is provided with a level sensor 110 for monitoring the internal material level of the dry powder hopper 100. The level sensor 110 is electrically connected to the DCS control system 800. The level sensor 110 monitors the internal material level of the dry powder hopper 100 and adjusts the amount of raw material in the dry powder hopper 100 according to the material level.

[0034] For example, the transition hopper 300 is equipped with an alarm probe 310 for monitoring the blockage of the transition hopper 300. The alarm probe 310 is electrically connected to the DCS control system 800. In case of blockage caused by lumpy material, an alarm signal can be output to handle the fault in time and prevent the blockage from causing an inappropriate amount of powdered polyacrylamide to enter the dissolving tank 700 and affect the dissolving effect.

[0035] For example, the powder-liquid dispersion and mixing device is automatically controlled by a DCS control system 800. The DCS control system 800 is electrically connected to the regulating valve 630, the flow meter 640, the material level sensor 110, the alarm probe 310 and the screw feeder 200. The DCS control system 800 is a distributed control system, which is a comprehensive computer control system for industrial automation. It achieves centralized management and decentralized control of the entire industrial process by distributing control tasks across multiple nodes, thereby improving production efficiency, reducing operating costs, and ensuring system safety and reliability. The DCS control system 800 is electrically connected to the regulating valve 630, flow meter 640, level gauge 110, alarm probe 310, and screw feeder 200 to control the water inlet flow rate of the liquid inlet pipe 620, monitor the material level in the dry powder hopper 100, and control the feed rate of the screw feeder 200. Specifically, in the powder-liquid dispersion and mixing device, when the liquid level is at the low limit (less than 20%), the blower and heater automatically start, the water inlet valve automatically opens after 120 seconds, and the feeder and vibrator automatically dispense the chemicals after a 20-second delay. The concentration can be set during this process. When the liquid level is at the high limit (greater than 90%), the feeder and vibrator automatically stop, the water inlet valve automatically closes after 20 seconds, and the blower and heater stop after a 120-second delay. Automatic feeding cannot be performed when the blower malfunctions, the feeder malfunctions, the hopper is short of material, or the hopper is blocked.

[0036] For example, a vibration motor 120 is installed on the dry powder hopper 100. The vibration motor 120 vibrates the dry powder hopper 100 to achieve vibratory feeding, which helps to transport the powdered polyacrylamide in the dry powder hopper 100 to the screw feeder 200.

[0037] For example, the dissolving tank 700 is a three-compartment dissolving tank 700. Specifically, the three-compartment dissolving tank 700 is equipped with a stirring device and has a stirring function. The three-compartment dissolving tank 700 realizes the functions of dissolving, maturing and storing, which is more conducive to the full dissolution and storage of powder.

[0038] The advantages of implementing the powder-liquid dispersion and mixing device provided by this utility model compared with the prior art are as follows:

[0039] This utility model relates to a dry powder hopper 100 for storing powdered polyacrylamide. The dry powder hopper 100 is kept away from the dissolving tank 700 to avoid the powdered polyacrylamide being affected by moisture and clumping due to direct connection. Indirect connection keeps the dry powder hopper 100 away from the dissolving tank 700, maintaining its dryness. A screw feeder 200 is connected to the outlet of the dry powder hopper 100 for quantitative and stable conveying of the powdered material, allowing for precise control of the discharge amount each time. A transition hopper 300 is connected to the output end of the screw feeder 200, enabling the screw feeder 200 to convey a fixed amount of powdered polyacrylamide to the transition hopper 300. A hot air blower 400 is connected to the transition hopper 300 and communicates with the transition hopper. The inner cavity of the hopper 300 is interconnected. After being heated by the hot air blower 400, the transition hopper 300 can effectively prevent the powder from clumping due to moisture and adhering to the outlet of the screw feeder 200. The powdered polyacrylamide enters the transition hopper 300 after being metered by the screw feeder. The hot air blower 400 blows air and pressurizes the transition hopper 300, and the metered powdered polyacrylamide in the transition hopper 300 is transported to the dissolving tank 700 through the dry powder feed pipe 500 for dissolution and subsequent processes. The powder-liquid dispersion and mixing device feeds the material through the screw feeder 200, the transition hopper 300 and the hot air blower 400, so that the feeding amount can be accurately controlled. Moreover, by keeping the dry powder hopper 100 away from the dissolving tank 700, the dry powder hopper 100 is not directly connected to the dissolving tank 700, so that the material is affected by moisture.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A powder-liquid dispersion and mixing device, characterized in that, include: A dry powder hopper, the outlet of which is connected to a screw feeder; A transition hopper is connected to the output end of the screw feeder, and the output end of the transition hopper is connected to a dry powder feed pipe. A hot air blower is connected to the transition hopper and communicates with the inner cavity of the transition hopper. The hot air blower is used to heat and pressurize the powder in the transition hopper for conveying. A dissolving tank, which is connected to the transition hopper via the dry powder feed pipe.

2. The powder-liquid dispersion and mixing device according to claim 1, characterized in that, The dry powder feed pipe is connected to a dispersing device at one end near the dissolving tank. The dispersing device is connected to the dissolving tank and is also connected to a liquid inlet pipe.

3. The powder-liquid dispersion and mixing device according to claim 2, characterized in that, The inner wall of the dispersion device is provided with a nozzle, which is connected to the liquid inlet pipe.

4. The powder-liquid dispersion and mixing device according to claim 3, characterized in that, The powder-liquid dispersion and mixing device is automatically controlled by a DCS control system, which is electrically connected to the screw feeder.

5. The powder-liquid dispersion and mixing device according to claim 4, characterized in that, The inlet pipe is equipped with a regulating valve for adjusting the water output of the inlet pipe and a flow meter for monitoring the water flow rate of the inlet pipe. The regulating valve and the flow meter are electrically connected to the DCS control system.

6. The powder-liquid dispersion and mixing device according to claim 4, characterized in that, The dry powder hopper is equipped with a level sensor for monitoring the internal material level of the dry powder hopper, and the level sensor is electrically connected to the DCS control system.

7. The powder-liquid dispersion and mixing device according to claim 5, characterized in that, The transition hopper is equipped with an alarm probe to monitor blockage, and the alarm probe is electrically connected to the DCS control system.

8. The powder-liquid dispersion and mixing apparatus according to any one of claims 1 to 7, characterized in that, A vibration motor is installed on the dry powder hopper.

9. The powder-liquid dispersion and mixing device according to claim 1, characterized in that, The dissolving tank is a three-compartment dissolving tank.

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