A fine particulate APV recycling system

Abstract

This utility model relates to the field of vanadium metallurgy technology, specifically to a fine-particle APV recovery system, comprising: a filter press feed pump, the input end of which is connected to a first valve and a second valve, and the output end of which is connected to a third valve; a thickening tank, the bottom of which is connected to the input end of the filter press feed pump; a liquid alkali tank, connected to the input end of the filter press feed pump; and a filter press, connected to the output end of the filter press feed pump, the output end of which is connected to a wastewater tank and an APV silo. In the vanadium oxide production process, the loss of fine-particle APV in the supernatant after the precipitation process directly leads to a reduction in vanadium oxide yield. This utility model enables the effective recovery of these previously wasted fine particles, allowing for precise control and processing of the recovered material, reducing the introduction of impurities.

Description

Technical Field

[0001] This utility model relates to the field of vanadium metallurgy technology, specifically to a fine-particle APV recovery system. Background Technology

[0002] The production of vanadium oxide is a complex and delicate process, typically involving several key steps including raw material pretreatment, roasting, leaching, precipitation and melting or reduction, and wastewater treatment. In the raw material pretreatment stage, vanadium-containing raw materials undergo crushing, sieving, and magnetic separation to remove impurities, improve purity and reactivity, and lay the foundation for subsequent processes. The roasting process involves high-temperature heating to cause a chemical reaction of the vanadium compounds in the raw material, converting them into water-soluble vanadates. Precipitation is a core step in vanadium oxide production; by adding a specific precipitant to the vanadium-containing solution, vanadium is separated from the solution as a precipitate, yielding crude APV (ammonium metavanadate, a common intermediate product of vanadium oxide). However, the supernatant produced after precipitation contains a high concentration of fine-particle APV. Although conventional methods such as thickening tanks and wastewater sedimentation are used to recover these fine-particle APV, the actual results are not ideal. Some fine-particle APV still flows into the wastewater treatment process with the settled supernatant. The increase in APV content in wastewater leads to a corresponding increase in wastewater volume, which not only increases the difficulty and complexity of wastewater treatment, but also significantly increases the cost of wastewater treatment. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model proposes a fine particulate APV recycling system to solve the existing recycling problems.

[0004] This utility model provides a fine particulate APV recovery system, comprising: A filter press feed pump, wherein the input end of the filter press feed pump is connected to a first valve and a second valve, and the output end is connected to a third valve; A thickening tank, the bottom of which is connected to the input end of the filter press feed pump; A liquid alkali tank, which is connected to the input end of the filter press feed pump; A filter press, wherein the filter press is connected to the output end of the filter press feed pump, and the output end of the filter press is connected to the wastewater tank and the APV silo.

[0005] In some embodiments, the APV hopper is connected to a belt conveyor.

[0006] In some embodiments, the first valve is located between the filter press feed pump and the thickener.

[0007] In some embodiments, the second valve is located between the filter press feed pump and the liquid alkali tank.

[0008] In some embodiments, the third valve is located between the filter press feed pump and the filter press.

[0009] In some embodiments, a filter plate is provided between the filter press and the APV hopper.

[0010] In some embodiments, the filter plate is used to feed the attached APV into the APV hopper.

[0011] In some embodiments, the belt conveyor is used to deliver APVs from the APV hopper to the discharge port.

[0012] In some embodiments, the liquid alkali tank and the second valve are used to wash the filter plates.

[0013] In some embodiments, the liquid alkali tank is located at the bottom of the concentration tank.

[0014] The beneficial effects of this utility model are as follows: In the vanadium oxide production process, the loss of fine particulate vanadium (APV) particles in the supernatant after precipitation directly leads to a decrease in vanadium oxide yield. This invention enables the effective recovery of these previously wasted fine particles, allowing for precise control and processing of the recovered material and reducing the introduction of impurities. Attached Figure Description

[0015] To better understand this invention, reference can be made to the embodiments shown in the following figures. Components in the figures are not necessarily drawn to scale, and related elements may be omitted, or in some cases the scale may have been enlarged to emphasize and clearly illustrate the novel features described herein. Additionally, as is known in the art, system components may be arranged differently. Furthermore, in the figures, the same reference numerals denote corresponding parts throughout several views.

[0016] Figure 1 A reference schematic diagram of a fine particulate APV recovery system according to the present invention is shown; Explanation of reference numerals in the attached diagram: 1. Filter press feed pump; 2. Thickening tank; 3. Liquid alkali tank; 4. Filter press; 5. Wastewater tank; 6. APV silo; 7. Belt conveyor. Detailed Implementation

[0017] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in this invention, those skilled in the art will readily recognize that various modifications are possible without substantially departing from the teachings of the present invention. Accordingly, all such modifications should be included within the scope of this invention. Other substitutions, modifications, variations, and deletions can be made to the design, operating conditions, and parameters of the following exemplary embodiments without departing from the spirit of the present invention.

[0018] like Figure 1 As shown, this utility model proposes a fine particulate APV recovery system, comprising: The filter press feed pump 1 has its input end connected to a first valve and a second valve, and its output end connected to a third valve. Thickening tank 2, the bottom of which is connected to the input end of the filter press feed pump; Liquid alkali tank 3, which is connected to the input end of the filter press feed pump; Filter press 4 is connected to the output end of filter press feed pump, and the output end of filter press 4 is connected to wastewater tank 5 and APV silo 6.

[0019] Figure 1 Valve 1 is the first valve, valve 2 is the second valve, and valve 3 is the third valve.

[0020] The advantage of this invention is that it allows for the recovery and reuse of fine particulate vanadium (APV) particles in the supernatant after precipitation, thereby increasing vanadium oxide production and reducing wastewater generation.

[0021] The fine-particle APV recovery system proposed in this invention offers several significant advantages. It successfully recovers and utilizes fine-particle APV from the supernatant after sedimentation, improving the overall utilization rate of resources. This allows fine-particle APV that might otherwise be wasted to be reused in the production process, thereby effectively increasing vanadium oxide production. During production, the supernatant after sedimentation often contains a large amount of impurities and fine particulate matter. Direct discharge of this supernatant would not only cause serious pollution to the aquatic environment but also increase the difficulty and cost of wastewater treatment. The recovery system of this invention, by precisely recovering fine-particle APV, reduces the pollutant content in wastewater at the source, thus reducing the amount of wastewater generated. This reduces the company's reliance on and investment in wastewater treatment facilities, lowering operating costs.

[0022] A fine-particle APV recovery system is designed based on the principle of using a filter press 4, a belt conveyor 7, pipes, and valves to form a recovery system, thereby reducing wastewater volume, lowering wastewater treatment costs, and increasing vanadium oxide production.

[0023] First, connect the bottom of the thickener 2 to the filter press feed pump 1, and send the supernatant into the filter press 4 by pumping. The filter press 4 system performs functions such as feeding and squeezing, water pressing, and blowing to achieve solid-liquid separation of the supernatant; The filtered water from the plate and frame filter press solid-liquid separation enters the wastewater tank 5; the APV adhering to the filter plate is unloaded into the APV silo 6. The APV in the silo is bagged and recycled via belt conveyor 7; Close the first valve and open the second and third valves to send liquid alkali into the filter press 4 in a compressed state through the feed pump of the filter press 4. Wash the APV attached to the filter cloth to ensure the permeability of the filter cloth and prepare for the next solid-liquid separation of the supernatant.

[0024] To address the issue of high APV (Advanced Particulate Air) content in the wastewater pond, a plate and frame filter press 4, belt conveyor 7, pumps, and other equipment are added in the space between the thickener 2 and the wastewater pond 5 to form an ultrafine APV system. This further recovers APV, saves vanadium oxide costs, and improves the yield. The supernatant from the sedimentation is sent to the thickener 2, and then fed into the filter press 4 by the plate and frame feed pump for solid-liquid separation. The filtrate is discharged into the wastewater pond 5, and the APV material is unloaded into the APV hopper 6. It is then transported to the discharge port by the belt conveyor 7 below the APV hopper 6 for bagging and recycling. The first valve is closed, and the second and third valves are opened. The filter press 4 is kept in a compressed state, and the filter press feed pump 1 is started to wash the APV adhering to the filter cloth, ensuring the filter cloth's permeability and preparing for the next solid-liquid separation of the supernatant.

[0025] A liquid alkali tank 3 is installed at the bottom of the thickener 2, and a filter press feed pump 1 is added to the bottom of the thickener 2; a steel platform with two layers is built; a plate and frame filter press 4 and its control system are installed on the second layer; an APV silo 6 is installed below the filter press 4; a belt conveyor 7 is installed below the APV silo 6; pipelines and valves are laid to connect the thickener 2, filter press feed pump 1, filter press 4, liquid alkali tank 3, and wastewater tank 5; single-unit and linkage commissioning and trial run are conducted.

[0026] like Figure 1 As shown, in some embodiments, the APV hopper 6 is connected to a belt conveyor 7.

[0027] As a key facility for storing APV materials, the APV silo 6, connected to the belt conveyor 7, ensures the stable and continuous transfer of materials from the silo to subsequent production stages. The belt conveyor 7, with its continuous operation, can uninterruptedly transport APV from the APV silo 6, guaranteeing the smooth operation of the production process.

[0028] like Figure 1 As shown, in some embodiments, the first valve is located between the filter press feed pump 1 and the thickener 2.

[0029] like Figure 1 As shown, in some embodiments, the second valve is located between the filter press feed pump 1 and the liquid alkali tank 3.

[0030] like Figure 1 As shown, in some embodiments, the third valve is located between the filter press feed pump 1 and the filter press 4.

[0031] In some embodiments, a filter plate is provided between the filter press 4 and the APV hopper 6.

[0032] After the filter press 4 performs preliminary solid-liquid separation on the material containing APV, the resulting filter cake may still contain some tiny droplets and extremely fine impurity particles. At this point, a filter plate is installed between the filter press 4 and the APV hopper 6. When the filter cake discharged from the filter press 4 passes through the filter plate, the filter plate, with its unique porous structure, can further intercept the residual liquid in the filter cake, effectively retaining the liquid during its passage, thus achieving more thorough solid-liquid separation. Simultaneously, the filter plate also plays a certain filtering role for those tiny impurity particles mixed in the filter cake, blocking them on the filter plate surface, further purifying the material entering the APV hopper 6.

[0033] The filter cake discharged from filter press 4 often has a certain degree of moisture and viscosity. If it enters the APV hopper 6 directly, it is prone to clumping and blockage during transportation, affecting the normal transport of materials. After being filtered by the filter plates, some of the moisture in the filter cake is removed, reducing its viscosity and making it looser and easier to flow. As a result, when the filter cake enters the APV hopper 6 through the conveying device, it can flow more smoothly, reducing the probability of blockage and clumping, ensuring the continuity and stability of material transportation, avoiding production interruptions and equipment failures caused by poor material transportation, and improving the overall operating efficiency of the production line.

[0034] In some embodiments, the filter plate is used to feed the attached APV into the APV hopper 6.

[0035] The filter plate efficiently and accurately delivers the attached APV into the APV hopper 6, avoiding material accumulation and waste in intermediate stages. After the initial processes such as filtration are completed, a large amount of processed APV material will adhere to the filter plate. Without the effective guidance and conveying of the filter plate, this material may remain and accumulate on the filter plate surface, requiring additional manpower and time for cleaning and delaying subsequent processes. However, thanks to its reasonable structure and design, the filter plate, by utilizing its tilt angle, allows the attached APV to slide smoothly and accurately into the APV hopper 6, reducing the stagnation time of material between stages and greatly improving recycling efficiency.

[0036] In some embodiments, the belt conveyor 7 is used to deliver the APV in the APV hopper 6 to the discharge port.

[0037] The belt conveyor 7 is highly flexible and scalable. By increasing or decreasing the length of the conveyor section, adjusting the conveyor angle or speed, etc., the APV transmission path and efficiency can be easily optimized.

[0038] In some embodiments, the liquid alkali tank 3 and the second valve are used to wash the filter plates.

[0039] The liquid alkali tank 3 serves as a container for storing liquid alkali. During the filtration process, the filter plates trap a large amount of solid impurities and some organic matter. If this dirt adheres to the surface and pores of the filter plates for a long time, it will gradually clog the channels, leading to increased filtration resistance and a significant decrease in filtration efficiency. Liquid alkali has a strong cleaning ability and can chemically react with the dirt on the filter plates. The liquid alkali stored in the liquid alkali tank 3 can be supplied as needed, ensuring the continuity of the washing process and preventing interruptions due to insufficient washing liquid, thus guaranteeing timely and effective cleaning of the filter plates.

[0040] like Figure 1 As shown, in some embodiments, the liquid alkali tank 3 is located at the bottom of the concentration tank 2.

[0041] The liquid alkali tank 3 is placed at the bottom of the thickening tank 2, eliminating the need for a separate area to house it. While the thickening tank 2 itself occupies space in the production process, the liquid alkali tank 3 makes the layout of the entire production area more compact and rational, increasing the capacity of production equipment per unit area.

[0042] The above embodiments are possible examples of implementations of this utility model, and are provided only to enable those skilled in the art to clearly understand the principles of this utility model. Those skilled in the art should understand that the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosed embodiments of this utility model includes claims limited to these examples. Under the overall concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined with each other, resulting in many other variations of different aspects of the embodiments of this utility model as described above. For the sake of brevity, these variations are not provided in the specific embodiments. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this utility model should be included within the protection scope claimed by this utility model.

Claims

1. A fine particle APV recovery system characterized by, include: The filter press feed pump (1) has its input end connected to the first valve and the second valve, and its output end connected to the third valve. Thickening tank (2), the bottom of which is connected to the input end of the filter press feed pump; Liquid alkali tank (3), the liquid alkali tank (3) is connected to the input end of the filter press feed pump; The filter press (4) is connected to the output end of the filter press feed pump, and the output end of the filter press (4) is connected to the wastewater tank (5) and the APV silo (6).

2. The fine particle APV recovery system of claim 1 wherein, The APV hopper (6) is connected to the belt conveyor (7).

3. The fine particulate APV recovery system according to claim 1, characterized in that, The first valve is located between the filter press feed pump (1) and the thickener (2).

4. The fine particulate APV recovery system according to claim 1, characterized in that, The second valve is located between the filter press feed pump (1) and the liquid alkali tank (3).

5. The fine particulate APV recovery system according to claim 1, characterized in that, The third valve is located between the filter press feed pump (1) and the filter press (4).

6. The fine particulate APV recovery system according to claim 1, characterized in that, A filter plate is installed between the filter press (4) and the APV hopper (6).

7. The fine particulate APV recovery system according to claim 6, characterized in that, The filter plate is used to feed the attached APV into the APV hopper (6).

8. The fine particulate APV recovery system according to claim 2, characterized in that, The belt conveyor (7) is used to deliver the APVs in the APV hopper (6) to the discharge port.

9. The fine particulate APV recovery system according to claim 6, characterized in that, The liquid alkali tank (3) and the second valve are used to wash the filter plates.

10. The fine particle APV recovery system of claim 1 wherein, The liquid alkali tank (3) is located at the bottom of the concentration tank (2).

Images