Slurry filtering device for ammonium molybdate production

Abstract

The utility model discloses a slurry filtering device for ammonium molybdate production, which comprises a filtering cylinder bin, a ceramic filtering plate is arranged in the filtering cylinder bin, the inlet end of the filtering cylinder bin is connected with a slurry inlet pipeline, the outlet end of the filtering cylinder bin is connected with a slurry outlet pipeline, and the slurry outlet pipeline is connected with the ceramic filtering plate. The slurry inlet pipeline is provided with a first cleaning three-way valve, and the slurry outlet pipeline is provided with a second cleaning three-way valve. The utility model relates to the technical field of ammonium molybdate production, an existing filter silo is improved, and filter cloth is changed into a finer ceramic filter plate, so that the filter effect on ammonium molybdate slurry can be further improved; the forward washing assembly and the reverse washing assembly are arranged at the two ends of the filter silo respectively, cleaning operation on the ceramic filter plate and the interior of the filter silo can be achieved in the forward direction and the reverse direction, the ceramic filter plate is prevented from being blocked, in addition, diluted acid or alkaline cleaning liquid is adopted as a cleaning solvent, and the cleaning efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonium molybdate production, in particular to a slurry filtering device for ammonium molybdate production. Background Art

[0002] Ammonium molybdate is an important metallurgical raw material. It is the raw material for preparing molybdenum products such as molybdenum trioxide and molybdenum alloys. It can also be used to prepare catalysts and agricultural molybdenum fertilizers. In industry, molybdenum roasted sand is used as the raw material, and ammonia water is used to leach the molybdenum element in the molybdenum roasted sand to form an ammonium molybdate solution, which is then evaporated and crystallized to obtain the ammonium molybdate product. Among them, ammonium tetramolybdate is the basic raw material for producing high-purity molybdenum trioxide, metallic molybdenum powder and other molybdenum deep-processing products. Ammonium tetramolybdate is obtained by acid precipitation of ammonium molybdate solution. The insoluble matter content in ammonium molybdate solution directly affects the quality of ammonium tetramolybdate products. The ammonium molybdate slurry filtration device is an important equipment in the production process of ammonium molybdate. The cleaning of the filter cloth is a key step to ensure the normal operation of the filtration process. At present, most people use manual disassembly and cleaning of the filter cloth. The ammonium molybdate slurry is an acidic slurry, which is sticky and insoluble in water and adheres to the filter cloth. The residue on the filter cloth must be cleaned first, and then the filter cloth must be manually disassembled. If the filter cloth is difficult to disassemble, it can only be destructively disassembled and replaced with a new filter cloth. This method of cleaning the filter cloth is time-consuming, inefficient, and has a short service life, and affects normal production. In view of this, in-depth research was conducted on the above-mentioned issues, resulting in this case. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a slurry filtering device for ammonium molybdate production, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a slurry filtering device for ammonium molybdate production, comprising a filter silo, a ceramic filter plate is arranged in the filter silo, the inlet end of the filter silo is connected to a slurry inlet pipe, the outlet end of the filter silo is connected to a slurry outlet pipe, a No. 1 cleaning three-way valve is arranged on the slurry inlet pipe, a No. 2 cleaning three-way valve is arranged on the slurry outlet pipe, one end of the No. 1 cleaning three-way valve is connected to a No. 1 flushing pipeline, one end of the No. 1 flushing pipeline is connected to a positive flushing pressure pump, the liquid inlet end of the positive flushing pressure pump is connected to a clean water tank, one end of the No. 2 cleaning three-way valve is connected to a No. 2 flushing pipeline, one end of the No. 2 flushing pipeline is connected to a backwashing booster pump, the liquid inlet end of the backwashing booster pump is connected to a clean water tank, the clean water tank is connected to a cleaning agent dispensing tank and a pure water storage tank, and drain valves are arranged at the bottom of the filter silo and the clean water tank.

[0005] A medicine box is provided on one side of the above-mentioned cleaning agent dispensing tank, which is filled with acidic or alkaline cleaning agent concentrate and is connected to the cleaning agent dispensing tank through a dosing pump. The pure water storage tank is connected to the water supply pump, and the water outlet of the water supply pump is respectively connected to the cleaning agent dispensing tank and the clean water tank.

[0006] A stirring shaft is arranged in the cleaning agent dispensing tank, a stirring paddle is mounted on the stirring shaft, and the upper end of the stirring shaft passes through the upper end surface of the cleaning agent dispensing tank and is connected to the driving component.

[0007] A heating rod is arranged inside the cleaning water tank.

[0008] Electromagnetic flowmeters are provided on the connecting pipeline between the dosing pump and the cleaning agent dispensing tank, the connecting pipeline between the water supply pump and the cleaning agent dispensing tank, and the connecting pipeline between the water supply pump and the clean water tank.

[0009] An exhaust valve is arranged at the top of the liquid inlet end of the filter silo, and an air inlet valve is connected to the bottom of the liquid outlet end of the filter silo, and one end of the air inlet valve is connected to a nitrogen purge system.

[0010] The utility model provides a slurry filtering device for ammonium molybdate production. It has the following beneficial effects: the slurry filtering device for ammonium molybdate production improves the existing filter silo, replaces the filter cloth with a finer ceramic filter plate, can further improve the filtering effect of ammonium molybdate slurry, and sets forward flushing components and reverse flushing components at both ends of the filter silo, which can realize the cleaning operation of the ceramic filter plate and the inside of the filter silo from both positive and negative directions to avoid the clogging of the ceramic filter plate. In addition, during the cleaning operation, a diluted acidic or alkaline cleaning liquid can be used as a cleaning solvent, which can greatly improve the cleaning efficiency. After cleaning, pure water is used to flush the inside of the entire device. It has a simple structure and a high degree of automation, which can greatly reduce the difficulty of maintenance of the filtering equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of a slurry filtering device for ammonium molybdate production described in the utility model.

[0012] Figure 2 For this utility model Figure 1 Schematic diagram of the local enlarged structure.

[0013] In the figure: 1. Filtration silo; 2. Ceramic filter plate; 3. Slurry inlet pipeline; 4. Slurry outlet pipeline; 5. No. 1 cleaning three-way valve; 6. No. 2 cleaning three-way valve; 7. No. 1 flushing pipeline; 8. Forward flushing pressure pump; 9. Cleaning water tank; 10. No. 2 flushing pipeline; 11. Backwashing booster pump; 12. Cleaning agent mixing tank; 13. Pure water storage tank; 14. Drain valve; 15. Chemical box; 16. Dosing pump; 17. Water supply pump; 18. Stirring shaft; 19. Stirring paddle; 20. Drive assembly; 21. Heating rod; 22. Electromagnetic flowmeter; 23. Exhaust valve; 24. Inlet valve; 25. Nitrogen purge system. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0016] Embodiment: In conjunction with the specification Figure 1-2It can be seen that this scheme is to solve the problem in the prior art that the traditional ammonium molybdate slurry filtering device needs to clean the filter cloth frequently, which is time-consuming, inefficient, and has a short service life of the filter cloth, affecting the production efficiency. A slurry filtering device for ammonium molybdate production is specifically designed, wherein a ceramic filter plate 2 is arranged in a filter silo 1, a slurry liquid inlet pipe 3 is connected to the inlet end of the filter silo 1, a slurry liquid outlet pipe 4 is connected to the outlet end of the filter silo 1, a No. 1 cleaning three-way valve 5 is arranged on the slurry liquid inlet pipe 3, a No. 2 cleaning three-way valve 6 is arranged on the slurry liquid outlet pipe 4, one end of the No. 1 cleaning three-way valve 5 is connected to a No. 1 flushing pipe 7, and one end of the No. 1 flushing pipe 7 is connected to There is a positive flushing pressure pump 8, the liquid inlet end of the positive flushing pressure pump 8 is connected to the clean water tank 9, one end of the No. 2 cleaning three-way valve 6 is connected to the No. 2 flushing pipeline 10, one end of the No. 2 flushing pipeline 10 is connected to the backwashing booster pump 11, the liquid inlet end of the backwashing booster pump 11 is connected to the clean water tank 9, the clean water tank 9 is connected to a cleaning agent dispensing tank 12 and a pure water storage tank 13, and the bottom of the filter silo 1 and the clean water tank 9 are both provided with a drain valve 14. The existing filter silo 1 is improved, and the filter cloth is replaced with a finer ceramic filter plate 2, which can further improve the filtering effect of the ammonium molybdate slurry. Positive flushing is respectively provided at both ends of the filter silo 1. The components and reverse cleaning components can realize the cleaning operation of the ceramic filter plate 2 and the inside of the filter silo 1 from both the forward and reverse directions to avoid clogging of the ceramic filter plate 2. During the forward flushing operation, the cleaning liquid in the clean water tank 9 is pumped out through the forward flushing pressure pump 8, and injected into the filter silo 1 through the No. 1 flushing pipeline 7 and the No. 1 cleaning three-way valve 5, and after flushing the inner wall of the filter silo 1 and the ceramic filter plate 2, it is further refluxed to the clean water tank 9 through the No. 2 flushing three-way valve and the No. 2 flushing pipeline 10; similarly, during the reverse flushing operation, the backwashing booster pump 11 is started to pump out the cleaning liquid in the clean water tank 9 and return it to the filter silo 1 through the No. 2 flushing pipeline 1 0. The No. 2 cleaning three-way valve 6 is injected into the filter silo 1, and refluxes to the cleaning water tank through the No. 1 cleaning three-way valve 5 and the No. 1 flushing pipeline 7. The forward and reverse flushing can be performed alternately, thereby further improving the cleaning operation efficiency. In addition, during the cleaning operation, combined with the characteristics of ammonium molybdate being easily soluble in water, easily soluble in acid solutions, and easily soluble in alkali solutions, a diluted acidic or alkaline cleaning solution can be used as a cleaning solvent, which can quickly dissolve the ammonium molybdate crystals attached to the ceramic filter plate 2, greatly improving the cleaning efficiency. After cleaning, pure water is used to flush the entire device. The structure is simple and the degree of automation is high, which can greatly reduce the difficulty of maintenance of the filtering equipment.

[0017] In the specific implementation process, as a preferred setting, a medicine box 15 is provided on one side of the above-mentioned cleaning agent dispensing tank 12, and the medicine box 15 is filled with acidic or alkaline cleaning agent concentrate and is connected to the cleaning agent dispensing tank 12 through a dosing pump 16. The pure water storage tank 13 is connected to the water supply pump 17, and the water outlet end of the water supply pump 17 is respectively connected to the cleaning agent dispensing tank 12 and the clean water tank 9. An electromagnetic flowmeter 22 is provided on the connecting pipeline between the dosing pump 16 and the cleaning agent dispensing tank 12, the connecting pipeline between the water supply pump 17 and the cleaning agent dispensing tank 12, and the connecting pipeline between the water supply pump 17 and the clean water tank 9, wherein a stirring shaft 18 is provided in the cleaning agent dispensing tank 12, and a stirring paddle 1 is mounted on the stirring shaft 18. 9. The upper end of the stirring shaft 18 passes through the upper end surface of the cleaning agent dispensing tank 12 and is connected to the driving component 20. When in use, the dosing pump 16 is started, and the acidic or alkaline cleaning agent concentrate filled in the reagent box 15 is pumped into the cleaning agent dispensing tank 12 by the dosing pump 16. At the same time, the water supply pump 17 is started to pump the pure water in the pure water storage tank 13 into the cleaning agent dispensing tank 12. According to the set parameters, the electromagnetic flowmeter 22 measures the pumped amount of the concentrated liquid and the pure water, so that the concentration of the configured cleaning liquid meets the use requirements. At the same time, the driving component 20 is started while the liquid is pumped in, and the driving component 20 is used to drive the stirring shaft 18 and the stirring paddle 19 to rotate, so as to improve the cleaning liquid configuration efficiency.

[0018] In the specific implementation process, as a preferred setting, a heating rod 21 is provided inside the cleaning water tank 9 to moderately heat the cleaning liquid, which can effectively increase the reaction speed of the cleaning liquid and ammonium molybdate crystals and improve the cleaning operation efficiency.

[0019] In the specific implementation process, as a preferred setting, an exhaust valve 23 is provided at the top of the liquid inlet end of the above-mentioned filter silo 1, and an air inlet valve 24 is connected to the bottom of the liquid outlet end of the filter silo 1. One end of the air inlet valve 24 is connected to the nitrogen purge system 25. After the cleaning operation is completed, the drain valve 14 at the bottom of the filter silo 1 is opened, and after the liquid is emptied, the exhaust valve 23 and the air inlet valve 24 are opened, and nitrogen is supplied through the nitrogen purge system 25 to achieve nitrogen purging and drying inside the filter silo 1.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slurry filtering device for ammonium molybdate production, characterized in that: It comprises a filter silo, wherein a ceramic filter plate is arranged in the filter silo, the inlet end of the filter silo is connected to a slurry liquid inlet pipe, the outlet end of the filter silo is connected to a slurry liquid outlet pipe, a No. 1 cleaning three-way valve is arranged on the slurry liquid inlet pipe, a No. 2 cleaning three-way valve is arranged on the slurry liquid outlet pipe, one end of the No. 1 cleaning three-way valve is connected to a No. 1 flushing pipeline, one end of the No. 1 flushing pipeline is connected to a positive flushing pressure pump, the liquid inlet end of the positive flushing pressure pump is connected to a clean water tank, one end of the No. 2 cleaning three-way valve is connected to a No. 2 flushing pipeline, one end of the No. 2 flushing pipeline is connected to a backwashing booster pump, the liquid inlet end of the backwashing booster pump is connected to a clean water tank, a cleaning agent liquid dispensing tank and a pure water storage tank are connected to the clean water tank, and drain valves are arranged at the bottom of the filter silo and the clean water tank.

2. A slurry filtering device for ammonium molybdate production according to claim 1, characterized in that: A medicine box is arranged on one side of the cleaning agent dispensing tank, the medicine box is filled with acidic or alkaline cleaning agent concentrate and is connected to the cleaning agent dispensing tank through a dosing pump, the pure water storage tank is connected to the water supply pump, and the water outlet of the water supply pump is respectively connected to the cleaning agent dispensing tank and the clean water tank.

3. A slurry filtering device for ammonium molybdate production according to claim 1, characterized in that: A stirring shaft is arranged in the cleaning agent dispensing tank, a stirring paddle is mounted on the stirring shaft, and the upper end of the stirring shaft passes through the upper end surface of the cleaning agent dispensing tank and is connected to the driving component.

4. The slurry filtering device for ammonium molybdate production according to claim 1, characterized in that: A heating rod is arranged inside the cleaning water tank.

5. A slurry filtering device for ammonium molybdate production according to claim 2, characterized in that: Electromagnetic flowmeters are arranged on the connecting pipeline between the dosing pump and the cleaning agent dispensing tank, the connecting pipeline between the water supply pump and the cleaning agent dispensing tank, and the connecting pipeline between the water supply pump and the clean water tank.

6. The slurry filtering device for ammonium molybdate production according to claim 1, characterized in that: An exhaust valve is arranged at the top of the liquid inlet end of the filter silo, and an air inlet valve is connected to the bottom of the liquid outlet end of the filter silo. One end of the air inlet valve is connected to a nitrogen purge system.

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