A settling device for dilute phosphoric acid

Abstract

The application discloses a settling device for dilute phosphoric acid, which is used for reducing the clarification time of dilute phosphoric acid, improving the clarification effect of dilute phosphoric acid and the production rate of dilute phosphoric acid. The application comprises a settling agent preparation tank, a settling agent storage tank, a first clarification tank, a second clarification tank, a third clarification tank, a metering pump, a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the settling agent preparation tank is connected with the settling agent storage tank through the first pipeline and the second pipeline, and the first pipeline and the second pipeline are used for switching the use of the settling agent in the settling agent preparation tank and the settling agent storage tank; the third pipeline is connected with the first pipeline and the second pipeline; one end of the metering pump is connected with the third pipeline, and the other end is connected with the fourth pipeline; the fourth pipeline is connected with the first clarification tank, the second clarification tank and the third clarification tank, and the third pipeline and the fourth pipeline are used for conveying the settling agent to the first clarification tank, the second clarification tank and the third clarification tank.

Description

Technical Field

[0001] This application relates to the field of chemical machinery technology, and in particular to a sedimentation device for dilute phosphoric acid. Background Technology

[0002] In the chemical industry, phosphoric acid plays a crucial role in the national economy. It is used to produce high-efficiency phosphate fertilizers, manufacture beverage additives, and synthesize pharmaceuticals, finding wide application in fertilizers, food, and pharmaceuticals. The stability and development of the phosphoric acid industry are a vital cornerstone supporting the continued prosperity of multiple sectors.

[0003] During the production of dilute phosphoric acid, it often contains a large number of solid impurities. Effective clarification is crucial to ensuring the smooth progress of subsequent concentration and purification processes and guaranteeing the quality of the finished acid. Currently, clarification tanks are commonly used to store and clarify dilute phosphoric acid, separating solid impurities through natural sedimentation. In actual production, the traditional processing mode based on clarifiers relies on a certain number of clarifiers to ensure sufficient clarification time and space, thereby achieving a good clarification effect. When the number of clarifiers for storing dilute phosphoric acid is insufficient, the residence time of dilute phosphoric acid in the clarifiers is shortened, resulting in a significant decrease in the clarification effect. Ultimately, this leads to a reduction in the quality of the finished acid product, making it difficult to meet the market demand for high-quality phosphoric acid products. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a sedimentation device for dilute phosphoric acid, the sedimentation device comprising: The settling agent preparation tank, settling agent storage tank, first clarification tank, second clarification tank, third clarification tank, metering pump, first pipeline, second pipeline, third pipeline and fourth pipeline; The flocculant preparation tank is connected to the flocculant storage tank via the first pipe and the second pipe, and the first pipe and the second pipe are used to switch between using the flocculant in the flocculant preparation tank and the flocculant storage tank; The third pipe connects the first pipe and the second pipe; One end of the metering pump is connected to the third pipe, and the other end is connected to the fourth pipe; The fourth pipe is connected to the first clarification tank, the second clarification tank, and the third clarification tank. The third pipe and the fourth pipe are used to deliver the settling agent to the first clarification tank, the second clarification tank, and the third clarification tank.

[0005] Optionally, both the settling agent preparation tank and the settling agent storage tank are equipped with a dosing funnel and a stirring paddle; The dosing funnel is installed on the top of the settling agent preparation tank and the top of the settling agent storage tank, and is detachably connected to the top of the settling agent preparation tank and the settling agent storage tank; The agitator is installed inside the flocculant preparation tank and the flocculant storage tank.

[0006] Optionally, both the settling agent preparation tank and the settling agent storage tank are equipped with platforms and ladders; The platform is fixed to the settling agent preparation tank and the settling agent storage tank, and the platform is used to install the dosing funnel and the stirring paddle; One end of the escalator is fixedly connected to the platform, and the other end is connected to the ground.

[0007] Optionally, a patterned plate is provided on the platform for anti-slip purposes.

[0008] Optionally, both the settling agent preparation tank and the settling agent storage tank have a volume of 20 cubic meters.

[0009] Optionally, the settling agent preparation tank and the settling agent storage tank are made of carbon steel lined with rubber.

[0010] Optionally, an acid mixer is provided at the top of the first clarification tank, the second clarification tank, and the third clarification tank; The fourth pipeline is connected to the first clarification tank, the second clarification tank, and the third clarification tank via the acid mixer.

[0011] Optionally, valves are installed on the first, second, third, and fourth pipes.

[0012] Optionally, the settling device further includes a fifth pipe, on which the valve is installed; One end of the fifth pipe is connected to the first pipe and the second pipe, and the other end is connected to the trench.

[0013] Optionally, the first pipe, the second pipe, the third pipe, and the fourth pipe are made of stainless steel.

[0014] As can be seen from the above technical solutions, this application has the following advantages: 1. The sedimentation device for dilute phosphoric acid is equipped with a sedimentation agent preparation tank and a sedimentation agent storage tank. The sedimentation agent is prepared in the sedimentation agent preparation tank and the sedimentation agent storage tank, and then the sedimentation agent is added to the first clarification tank, the second clarification tank or the third clarification tank, which can accelerate the clarification of the liquid to be treated and improve production efficiency.

[0015] 2. Both the flocculant preparation tank and the flocculant storage tank have the function of preparing and storing flocculant. The flocculant in either tank can be flexibly switched through the first and second pipelines to ensure a continuous supply of flocculant, improve the flexibility and reliability of the equipment, and avoid the interruption of flocculant supply due to problems in the preparation or storage process.

[0016] 3. A metering pump is installed at the connection between the third and fourth pipelines for conveying the settling agent. The metering pump controls the flow rate of the settling agent and delivers the accurate dosage of settling agent to the first, second, or third clarification tank. This ensures that an appropriate amount of settling agent can be used under different dilute phosphoric acid treatment volumes and concentrations, thereby improving the clarification effect and avoiding incomplete clarification or waste of reagents due to improper use of settling agent. Attached Figure Description

[0017] Figure 1 A schematic diagram of the sedimentation device for dilute phosphoric acid provided in this application. Detailed Implementation

[0018] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0022] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Please see Figure 1 This application first provides an embodiment of a sedimentation device for dilute phosphoric acid, which includes: 1. Settling agent preparation tank, 2. Settling agent storage tank, 3. First clarification tank, 4. Second clarification tank, 5. Third clarification tank, 6. Metering pump, 7. First pipeline, 8. Second pipeline, 9. Third pipeline, and 10. The settling agent preparation tank 1 is connected to the settling agent storage tank 2 through the first pipe 7 and the second pipe 8. The first pipe 7 and the second pipe 8 are used to switch the use of settling agents in the settling agent preparation tank 1 and the settling agent storage tank 2. The third pipe 9 connects the first pipe 7 and the second pipe 8; One end of the metering pump 6 is connected to the third pipe 9, and the other end is connected to the fourth pipe 10; The fourth pipe 10 is connected to the first clarification tank 3, the second clarification tank 4 and the third clarification tank 5. The third pipe 9 and the fourth pipe 10 are used to deliver settling agent to the first clarification tank 3, the second clarification tank 4 and the third clarification tank 5.

[0024] The functions of each component in this embodiment are described in detail below: Settling agent preparation tank 1: Settling agent preparation tank 1 is typically a cylindrical vertical tank with a large capacity. In this embodiment, the settling agent preparation tank 1 has a capacity of 20 cubic meters and is made of carbon steel lined with rubber, which has good corrosion resistance to prevent the raw materials from corroding the tank during the preparation process and ensure that the quality of the settling agent is not affected. Settling agent preparation tank 1 is the preparation site for the settling agent. The top of the settling agent preparation tank 1 is equipped with a dosing funnel 11 to facilitate the addition of raw materials into the settling agent preparation tank 1. The settling agent preparation tank 1 is also equipped with a stirring paddle 12, which is installed in the center of the settling agent preparation tank 1. It can fully stir and mix the added raw materials, so that the various components are evenly dispersed, and a settling agent that meets the requirements for use is prepared.

[0025] Flocculant Storage Tank 2: Like the flocculant preparation tank 1, flocculant storage tank 2 is a cylindrical vertical structure with the same capacity and material. It is used to store prepared flocculant, ensuring a continuous supply. Simultaneously, flocculant storage tank 2 can also be used to prepare flocculant, meaning it has the same function as flocculant preparation tank 1. Therefore, flocculant storage tank 2 can also be equipped with a dosing funnel 11 and an agitator 12. The settling agent storage tank 2 is detachably connected to the dosing funnel 11 and the agitator 12. When settling agent needs to be prepared, the dosing funnel 11 and the agitator 12 can be installed on the settling agent storage tank 2. After the settling agent is prepared and stored, the dosing funnel 11 and the agitator 12 can be removed from the settling agent storage tank 2 to prevent the agitator 12 from being corroded due to prolonged immersion in the settling agent storage tank 2, or other impurities from entering through the dosing funnel 11 and affecting the settling agent. The application of the settling agent preparation tank 1 is the same as that of the settling agent storage tank 2. A level gauge can also be installed on the tank body of the settling agent storage tank 2 to display the amount of settling agent in the tank in real time, facilitating timely replenishment of the settling agent by operators and avoiding supply interruptions.

[0026] First clarifier tank 3, second clarifier tank 4, and third clarifier tank 5: These are all high-capacity solution tanks, providing sufficient space for the sedimentation process. They also possess good corrosion resistance and wear resistance, capable of withstanding prolonged liquid immersion and particle erosion. First clarifier tank 3 is used to store dilute phosphoric acid or 58% concentrated phosphoric acid, second clarifier tank 4 is used to store 58% concentrated phosphoric acid, and third clarifier tank 5 is used to store dilute phosphoric acid. First clarifier tank 3, second clarifier tank 4, and third clarifier tank 5 receive settling agent transported through fourth pipe 10. Through the action of the settling agent, suspended particles in the liquid gradually settle to the bottom of the tank, achieving separation of liquid and solid particles, thereby clarifying and purifying the liquid.

[0027] Metering pump 6: The metering pump 6 has inlet and outlet interfaces on its pump body for easy connection to the third pipe 9 and the fourth pipe 10. In this embodiment, a metering pump 6 with a flow rate of 2 and a head of 30 is used. The metering pump 6 achieves precise metering and control of the flocculant delivery flow rate through the reciprocating motion frequency and stroke of the piston or diaphragm. It can stably deliver the flocculant to the first clarification tank 3, the second clarification tank 4, and the third clarification tank 5 according to the set dosage, meeting the flocculant dosage requirements under different working conditions and ensuring the clarification effect.

[0028] Pipes 7, 8, 9, and 10 are all circular tubular pipes, each equipped with a valve 13. They are made of highly corrosion-resistant stainless steel, with the pipe diameter and material designed according to actual needs to ensure smooth transport of the settling agent, prevent corrosion of the pipes, and possess sufficient pressure resistance to prevent leakage and rupture during transport. For example, pipes 7 and 8 use 316 stainless steel pipes with an outer diameter of 50 mm, while pipe 10 uses 316 stainless steel pipes with an outer diameter of 25 mm. Pipes 7 and 8 connect the settling agent preparation tank 1 and the settling agent storage tank 2. Multiple valves 13 are installed on pipes 7 and 8, allowing for switching between the settling agent in the preparation tank 1 and the storage tank 2, thus improving the flexibility of the settling device. The third pipe 9 connects the first and second pipes, serving to converge and divert the sediment, transporting the sediment from the sediment preparation tank 1 or sediment storage tank 2 to the metering pump 6, ensuring that the sediment can smoothly enter the metering stage. The fourth pipe 10, in conjunction with the valve 13 on the fourth pipe 10, transports the sediment accurately metered by the metering pump 6 to the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5.

[0029] Working principle: The operator installs a dosing funnel 11 and an agitator 12 on the settling agent preparation tank 1 or settling agent storage tank 2. According to the predetermined formula, the raw materials are added to the settling agent preparation tank 1 or settling agent storage tank 2 through the dosing funnel 11, and the agitator 12 is started for thorough mixing. After the settling agent is prepared, based on actual production needs, the operator selects to use the settling agent from the settling agent preparation tank 1 or settling agent storage tank 2 by controlling the valves 13 on the first pipeline 7 and the second pipeline 8. Then, the operator opens the valve 13 on the third pipeline 9 to allow the settling agent to flow through the metering pump 6. The metering pump 6 precisely controls the delivery dosage of the settling agent according to the set flow parameters, delivering a fixed amount of settling agent to the fourth pipeline 10. The operator then selects to open the valve 13 on the fourth pipeline 10 to deliver the settling agent to the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5. In the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5, the settling agent is fully mixed with the liquid to be treated, causing the suspended particles in the liquid to gradually settle to the bottom of the tank, thereby achieving the clarification and purification of the liquid.

[0030] In this embodiment, the flocculant is prepared in the flocculant preparation tank 1 and the flocculant storage tank 2, and then added to the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5 to accelerate the clarification of the liquid to be treated and improve production efficiency. Both the flocculant preparation tank 1 and the flocculant storage tank 2 have the function of preparing and storing flocculant. The flocculant in either tank can be flexibly switched through the first pipe 7 and the second pipe 8, ensuring a continuous supply of flocculant and improving the flexibility and reliability of the device. This avoids interruptions in the flocculant supply due to problems in the preparation or storage process. Simultaneously, when adding the flocculant, the metering pump 6 controls the flow rate of the flocculant, delivering the accurate dosage to the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5. This ensures that an appropriate amount of flocculant can be used under different dilute phosphoric acid treatment volumes and concentrations, thereby improving the clarification effect and avoiding incomplete clarification or waste of reagents due to improper flocculant dosage.

[0031] In an optional embodiment, both the settling agent preparation tank 1 and the settling agent storage tank 2 are provided with a platform 14 and a ladder 15; Platform 14 is fixed on the settling agent preparation tank 1 and the settling agent storage tank 2. Platform 14 is used to install the dosing funnel 11 and the stirring paddle 12. One end of the escalator 15 is fixedly connected to the platform 14, and the other end is connected to the ground.

[0032] The platform 14 is equipped with a patterned plate 16, which is used for anti-slip.

[0033] Platform 14: Platform 14 is installed in the upper middle part of the settling agent preparation tank 1 and the settling agent storage tank 2. It can be a ring surrounding the settling agent preparation tank 1 and the settling agent storage tank 2, or it can be a circular or square structure, etc. It needs to have a certain area to facilitate the operators to stand and install devices such as the dosing funnel 11 and the stirring paddle 12. For example, a rectangular platform 14 with a length of 5 meters, a width of 2 meters, and a height of 2.2 meters. Platform 14 is made of carbon steel and the surface is treated with anti-corrosion, which has the characteristics of high strength and corrosion resistance, and can bear the weight of operators and equipment. The surface of platform 14 is also provided with patterned plates 16, such as diamond pattern, corrugated pattern, and checkered pattern, to increase the friction between the soles of the feet and the surface of platform 14 when the operators walk or work on platform 14, so as to avoid slipping and injury due to the wet surface, and to ensure the personal safety of the operators. At the same time, guardrails can also be installed on the edges of platform 14 to prevent accidental falls.

[0034] Escalator 15: Escalator 15 is typically an inclined straight-line structure, consisting of a ladder beam, treads, and handrails. The ladder beam is made of channel steel or I-beams, and the handrails are usually made of steel pipes to ensure stability when personnel ascend or descend the escalator 15. One end of the escalator 15 is fixedly connected to the platform 14, and the other end is connected to the ground, providing operators with a passage from the ground to the platform 14, facilitating their access to, operation, inspection, and maintenance of the settling agent preparation tank 1 and the settling agent storage tank 2.

[0035] In this embodiment, a platform 14 and a ladder 15 are provided on the flocculant preparation tank 1 or the flocculant storage tank 2. When operation is required on the flocculant preparation tank 1 or the flocculant storage tank 2, the operator can climb from the ground to the platform 14 via the ladder 15. After reaching the platform 14, the operator, with the protection of the checkered plate 16, stably installs the dosing funnel 11 and the stirring paddle 12 on the platform 14, or performs inspections and maintenance on the installed equipment. After completing the operation, the operator returns to the ground via the ladder 15. The platform 14 and the ladder 15 work together to provide the operator with a safe and convenient working passage and work space, enabling the flocculant preparation and storage operations to be carried out smoothly.

[0036] In an optional embodiment, an acid mixer 17 is provided at the top of the first clarification tank 3, the second clarification tank 4 and the third clarification tank 5; The fourth pipe 10 is connected to the first clarification tank 3, the second clarification tank 4 and the third clarification tank 5 through the acid mixer 17.

[0037] In this embodiment, when the settling agent is delivered to the fourth pipeline 10, the valve 13 of the fourth pipeline 10 is controlled according to actual production needs, so that the fourth pipeline 10 delivers the settling agent to the acid mixer 17 at the top of the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5. The acid mixer 17 starts working, using its own stirring, spraying, or other mixing mechanisms to fully mix the incoming settling agent with the liquid to be treated in the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5. Under the action of the acid mixer 17, the settling agent can be quickly and evenly dispersed into the liquid to be treated, causing the suspended particles in the dilute phosphoric acid to quickly react with the settling agent and settle to the bottom of the tank, achieving the separation of liquid and solid particles, and completing the clarification and purification process of dilute phosphoric acid. The acid mixer 17 improves the dispersion degree of the settling agent in the first clarification tank 3, the second clarification tank 4, or the third clarification tank 5, accelerates the settling speed of particles, shortens the clarification time of dilute phosphoric acid, and improves production efficiency.

[0038] In an optional embodiment, the settling device further includes a fifth conduit 18 on which a valve 13 is installed; One end of the fifth pipe 18 is connected to the first pipe 7 and the second pipe 8, and the other end is connected to the trench 19.

[0039] In this embodiment, the fifth pipe 18 connects to the first pipe 7 and the second pipe 8, and is also connected to the trench 19. During the normal preparation, storage, and transportation of the settling agent, the valve 13 on the fifth pipe 18 is closed, which does not affect the normal transportation of the settling agent through the first pipe 7, the second pipe 8, the third pipe 9, and the fourth pipe 10. When the settling agent preparation tank 1, the settling agent storage tank 2, the first pipe 7, or the second pipe 8 needs to be cleaned, or when pipe blockage occurs, the valve 13 on the fifth pipe 18 can be opened. At this time, the settling agent remaining in the first pipe 7 and the second pipe 8, or the settling agent in the settling agent preparation tank 1 and the settling agent storage tank 2 that need to be emptied, can be directly discharged into the trench 19 through the fifth pipe 18, reducing the risk of pipe blockage and also reducing the problem of settling agent residue inside the device. This allows the entire settling process to operate according to the production plan, reducing production interruptions caused by pipe blockage.

[0040] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sedimentation device for dilute phosphoric acid, characterized in that, include: The settling agent preparation tank, settling agent storage tank, first clarification tank, second clarification tank, third clarification tank, metering pump, first pipeline, second pipeline, third pipeline and fourth pipeline; The flocculant preparation tank is connected to the flocculant storage tank via the first pipe and the second pipe, and the first pipe and the second pipe are used to switch between using the flocculant in the flocculant preparation tank and the flocculant storage tank; The third pipe connects the first pipe and the second pipe; One end of the metering pump is connected to the third pipe, and the other end is connected to the fourth pipe; The fourth pipe is connected to the first clarification tank, the second clarification tank, and the third clarification tank. The third pipe and the fourth pipe are used to deliver the settling agent to the first clarification tank, the second clarification tank, and the third clarification tank.

2. The settling device according to claim 1, characterized in that, Both the flocculant preparation tank and the flocculant storage tank are equipped with dosing funnels and stirring paddles; The dosing funnel is installed on the top of the settling agent preparation tank and the top of the settling agent storage tank, and is detachably connected to the top of the settling agent preparation tank and the settling agent storage tank; The agitator is installed inside the flocculant preparation tank and the flocculant storage tank.

3. The settling device according to claim 2, characterized in that, Both the flocculant preparation tank and the flocculant storage tank are equipped with platforms and ladders; The platform is fixed to the settling agent preparation tank and the settling agent storage tank, and the platform is used to install the dosing funnel and the stirring paddle; One end of the escalator is fixedly connected to the platform, and the other end is connected to the ground.

4. The settling device according to claim 3, characterized in that, The platform is equipped with a patterned plate, which is used for anti-slip purposes.

5. The settling device according to any one of claims 1 to 4, characterized in that, Both the flocculant preparation tank and the flocculant storage tank have a volume of 20 cubic meters.

6. The settling device according to any one of claims 1 to 4, characterized in that, The flocculant preparation tank and the flocculant storage tank are made of carbon steel lined with rubber.

7. The settling device according to claim 1, characterized in that, The top of the first clarification tank, the second clarification tank, and the third clarification tank are all equipped with acid mixers; The fourth pipeline is connected to the first clarification tank, the second clarification tank, and the third clarification tank via the acid mixer.

8. The settling device according to claim 1, characterized in that, Valves are installed on the first pipe, the second pipe, the third pipe, and the fourth pipe.

9. The settling device according to claim 8, characterized in that, The settling device also includes a fifth pipe, on which the valve is installed; One end of the fifth pipe is connected to the first pipe and the second pipe, and the other end is connected to the trench.

10. The settling device according to claim 8, characterized in that, The first pipe, the second pipe, the third pipe, and the fourth pipe are made of stainless steel.

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