High-efficiency sulfur concentrate filtering system and filtering method thereof

Abstract

The application discloses a kind of high-efficiency sulphur concentrate filtering system and filtering method thereof, belong to sulphur concentrate filtering technical field, the system includes ceramic filter assembly, vacuum generating assembly, material concentration adjusting mechanism, material level control mechanism, main shaft speed adjusting mechanism, backwashing unit and automatic control unit.The application adopts the above-mentioned high-efficiency sulphur concentrate filtering system and filtering method thereof, by optimizing the micropore design of ceramic filter plate, combined use of vacuum pump system and jet device, adjusting material concentration, controlling material level, setting appropriate main shaft speed, optimizing backwashing and realizing automatic control and other ways, solve the problems of traditional filter, such as time-consuming and labor-consuming, high cost, low filtering efficiency and other problems, reduce production cost and labor intensity, improve the filtering efficiency of sulphur concentrate, meet the customer's requirement for product moisture content, avoid the influence of measurement deviation on sales benefit.

Description

Technical Field

[0001] This invention relates to the field of sulfur concentrate filtration technology, and in particular to a high-efficiency sulfur concentrate filtration system and filtration method. Background Technology

[0002] In existing technologies, ceramic filters are advanced solid-liquid separation machines with advantages such as excellent production performance, energy saving and consumption reduction, and clean and environmentally friendly operation. They are currently being widely used in the mineral processing industry. In recent years, ceramic filters and cloth-type vacuum filters have seen significant development in application industries and fields, especially in wastewater purification, dewatering of mineral concentrates and tailings, and material separation. They are also widely used in liquid-solid separation processes in industries such as metallurgy and power generation.

[0003] Ceramic filters play an indispensable role in safe and efficient mining. However, traditional ceramic filters require regular cleaning and filter element replacement, which consumes significant time and manpower, and the replacement cost is also high. Furthermore, traditional filters suffer from low filtration efficiency and unstable moisture content in sulfur concentrate products during filtration. This not only affects production efficiency but may also lead to metering errors due to unstable moisture content, thus impacting sales revenue. Therefore, there is an urgent need to research a high-efficiency sulfur concentrate filtration system and its filtration method. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency sulfur concentrate filtration system and filtration method, which reduces production costs and labor intensity, improves sulfur concentrate filtration efficiency, and meets customer requirements for product moisture content.

[0005] To achieve the above objectives, the present invention provides a high-efficiency sulfur concentrate filtration system, comprising:

[0006] A ceramic filter assembly, comprising a ceramic filter plate, wherein the micropores of the ceramic filter plate are matched with the diameter and distribution of the sulfur concentrate material, and the ceramic filter plate is a large ceramic plate with high water permeability.

[0007] A vacuum generating assembly, which is composed of a vacuum pump system and an ejector, is used to increase the vacuum level and vacuum flow rate;

[0008] A material concentration regulating mechanism, wherein the material concentration regulating mechanism adjusts the concentrate concentration by means of overflow and can adjust the overflow level;

[0009] A material level control mechanism is used to adjust the material level in the ceramic filter tank to control the slurry suction time and slurry suction thickness of the ceramic filter plate.

[0010] A spindle speed adjustment mechanism that adjusts the spindle speed according to the properties of the sulfur concentrate material;

[0011] A backwashing unit that adjusts water or air pressure according to the filtration effect;

[0012] An automatic control unit, which performs automatic control according to a preset program based on concentration, liquid level, and vacuum degree.

[0013] Preferably, the vacuum pump system includes at least two vacuum pumps, which are connected in parallel.

[0014] Preferably, the material concentration regulating mechanism includes an overflow trough and an regulating baffle, wherein the regulating baffle is disposed inside the overflow trough.

[0015] Preferably, the spindle speed adjustment mechanism includes a variable frequency motor, which is connected to the spindle drive.

[0016] Preferably, the backwashing unit includes a water storage tank, a pressure pump, and pipelines, wherein the pipelines are connected to the water storage tank, the pressure pump, and the ceramic filter plate, respectively.

[0017] Preferably, the automatic control unit includes sensors and a controller. The sensors monitor concentration, liquid level, and vacuum level, and the controller controls each component according to a preset program based on the detected parameters.

[0018] This invention also provides a filtration method for a high-efficiency sulfur concentrate filtration system, comprising the following steps:

[0019] S1. Select ceramic filter plates to match the micropores of the ceramic filter plates with the particle size and distribution of the sulfur concentrate. Select ceramic filter plates with high water permeability for the same pore size, and use large ceramic plates to increase the filtration area.

[0020] S2. Adjust the vacuum level by using a vacuum pump system in conjunction with an ejector to improve the vacuum level and vacuum flow rate;

[0021] S3. Adjust the material concentration by increasing the concentrate concentration through overflow, and balance the concentrate concentration and stirring effect by adjusting the overflow level to achieve high production capacity.

[0022] S4. Control the material level and select the optimal material level so that the ceramic filter plate has appropriate suction time and suction thickness in the vacuum zone, ensuring that the production capacity and concentrate moisture meet the requirements.

[0023] S5. Set the spindle speed and adjust the spindle speed according to the properties of the sulfur concentrate material to optimize the filter cake formation time, slurry thickness and filter cake drying degree, so as to achieve dual optimization of production capacity and concentrate moisture, while ensuring that the ceramic plate can be effectively cleaned.

[0024] S6. Optimize backwashing by adjusting the water or air pressure of the backwashing unit according to the filtration effect to prevent blockage or leakage in the backwash water pipeline system and blockage of the micropores of the ceramic plate.

[0025] S7. Automatic control is performed by the automatic control unit according to the concentration, liquid level, and vacuum degree according to the preset program.

[0026] Preferably, in step S3, when the concentrate concentration is too high and affects stirring, the overflow level is lowered; when it is necessary to increase production capacity, the overflow level is raised.

[0027] Preferably, in step S4, the material level range corresponding to different sulfur concentrate materials is determined through multiple experiments.

[0028] Preferably, in step S5, for viscous sulfur concentrate, the spindle speed is reduced; for easily formable sulfur concentrate, the spindle speed is increased, and the ceramic plate is effectively cleaned in each cycle.

[0029] Preferably, in step S6, the adjusted water pressure range is 0.2-0.5 MPa, and the air pressure range is 0.3-0.6 MPa.

[0030] Therefore, the present invention employs the above-mentioned high-efficiency sulfur concentrate filtration system and filtration method, and the technical effects are as follows:

[0031] This invention optimizes the micropore design of the ceramic filter plate based on the particle size and distribution of the material, ensuring the matching between the micropores and the material particle size and effectively preventing clogging. Simultaneously, it selects a ceramic filter plate with high water permeability to improve slurry absorption performance and increases the filter plate area, significantly enhancing filtration efficiency.

[0032] By combining the vacuum pump system with the ejector, both vacuum level and vacuum flow rate are improved, thus ensuring high production capacity and excellent filter cake moisture control.

[0033] Adjust the material concentration according to the changes in the suspension properties, optimize the concentrate concentration by means of overflow and other methods, and adjust the slurry suction time and thickness of the ceramic filter plate according to the material level to achieve the best production capacity and concentrate moisture balance.

[0034] By adjusting the spindle speed of the ceramic filter to optimize the filter cake formation time and slurry thickness, and taking into account the degree of filter cake drying, both production capacity and concentrate moisture content can be optimized.

[0035] By optimizing the water or air pressure of the backwash unit, blockage or leakage in the backwash water pipeline system is effectively prevented, and the clogging of the micropores of the ceramic plate is also avoided, ensuring the continuous and stable filtration effect.

[0036] The system automatically controls the concentration, liquid level, and vacuum according to a preset program, which improves the automation level of production, reduces the intensity of manual labor, and increases production efficiency.

[0037] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0038] Figure 1 This is a structural diagram of a high-efficiency sulfur concentrate filtration system according to the present invention;

[0039] Figure 2 This is a flowchart of an embodiment of a filtration method for a high-efficiency sulfur concentrate filtration system according to the present invention. Detailed Implementation

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," as used in this invention, mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked," etc., are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0042] Example 1

[0043] like Figure 1 As shown, the present invention provides a high-efficiency sulfur concentrate filtration system, including a ceramic filter assembly, a vacuum generating assembly, a material concentration regulating mechanism, a material level control mechanism, a spindle speed regulating mechanism, a backwashing unit, and an automatic control unit.

[0044] The ceramic filter assembly uses ceramic filter plates with a micropore diameter of 8μm, which matches the sulfur concentrate material to be filtered (particle size mainly distributed between 5-12μm). The water permeability of this ceramic filter plate is 1.2×10⁻⁶. -4 cm / s, the area of ​​a single filter plate is 1.5m². 2 A total of 8 filters were installed, with a total filtration area of ​​12m². 2 .

[0045] The vacuum pump system in the vacuum generating assembly includes two 2BV5110 water ring vacuum pumps connected in parallel. Each pump has a pumping capacity of 15 m³ / s. 3The vacuum rate is 0.097 MPa. The ejector is made of stainless steel and is connected in series with the vacuum pump system. Together, they achieve a system vacuum of -0.092 MPa and a vacuum flow rate of 25 m³ / h. 3 / h.

[0046] The material concentration adjustment mechanism includes a volume of 5m³ 3 The overflow trough is equipped with an adjustable baffle that can move up and down. The baffle can be adjusted from 0 to 30 cm, and the overflow position can be changed by adjusting the height of the baffle.

[0047] The material level control mechanism consists of a float level sensor and an electric valve, which can control the material level in the ceramic filter tank within the range of 30-60cm. The material level can be precisely controlled by adjusting the opening of the electric valve.

[0048] The spindle speed adjustment mechanism uses a YVP200L-4 variable frequency motor with a power of 30kW, which is connected to the spindle via a coupling. The speed adjustment range is 0-15r / min.

[0049] The backwash unit contains a volume of 2m³ 3 The system includes a water storage tank and a ZWL8-15 pneumatic pump with a maximum working pressure of 0.8 MPa. The piping uses DN50 stainless steel pipes, connecting to the water storage tank, pneumatic pump, and ceramic filter plate. Valves control the switching between water pressure and pneumatic backwashing modes.

[0050] The sensors in the automatic control unit include a CONZELL-IR concentration sensor (measuring range 0-30%), a UQK-651 level sensor (measuring range 0-100cm), and a Z-602 vacuum sensor (measuring range -0.1-0MPa). The controller uses a PLC (model S7-1200), and the preset program can automatically control the operation of each component based on the parameters detected by the sensors.

[0051] like Figure 2 As shown, the present invention also provides a filtration method for a high-efficiency sulfur concentrate filtration system, the specific steps of which are as follows:

[0052] S1. Select a ceramic filter plate. Testing revealed that the particle size of the sulfur concentrate to be filtered is mainly distributed between 5-12 μm. Therefore, a ceramic filter plate with a micropore diameter of 8 μm was selected. This filter plate has a water permeability of 1.2 × 10⁻⁶ for the same pore size. -4 The speed is cm / s, and the area of ​​a single block is 1.5m². 2 A total of 8 filters were installed to increase the filtration area.

[0053] S2. Adjust the vacuum level, start two parallel water ring vacuum pumps, and simultaneously turn on the ejector to stabilize the system vacuum at -0.092MPa and the vacuum flow rate at 25m³ / h. 3 / h.

[0054] S3. Adjusting material concentration: The initial concentrate concentration is 15%. The concentrate concentration is increased by overflow. When the concentration reaches 22%, if the stirring effect is observed to be affected, the regulating baffle in the overflow tank is lowered by 5cm to maintain the concentrate concentration at about 20%, which ensures the processing capacity without affecting the stirring.

[0055] S4. Control the material level. Through multiple tests, the optimal material level range for this sulfur concentrate material is determined to be 40-50cm. The material level control mechanism stabilizes the material level in the ceramic filter tank at 45cm. At this time, the slurry absorption time and slurry thickness of the ceramic filter plate in the vacuum zone are appropriate.

[0056] S5. Set the spindle speed. The sulfur concentrate material being filtered has a medium viscosity. Set the variable frequency motor speed to 8 r / min. At this speed, the filter cake formation time is moderate, the slurry thickness is about 3 mm, the filter cake is well dried, and the ceramic plate can be effectively cleaned in each cycle.

[0057] S6. Optimized backwashing: During the filtration process, when a 10% decrease in filtration efficiency is detected, the backwashing unit is activated. When using water pressure backwashing, the water pressure is adjusted to 0.3 MPa; when using air pressure backwashing, the air pressure is adjusted to 0.4 MPa. Each backwashing session lasts 30 seconds, effectively preventing blockage or leakage in the backwash water pipeline system and clogging of the micropores in the ceramic plate.

[0058] S7. Automatic control: The automatic control unit monitors the concentration, liquid level, and vacuum level in real time. When the concentration is below 18%, the controller controls the material concentration adjustment mechanism to raise the overflow level to increase the concentrate concentration. When the liquid level is below 40cm, the control mechanism increases the water inlet to raise the material level. When the vacuum level is below -0.09MPa, the vacuum generating component is controlled to increase the vacuum level to ensure that the filtration process is stable and efficient.

[0059] The above system and method were used to filter sulfur concentrate, achieving a filtration efficiency of 2.5 t / h and a filter cake moisture content of 8%, which meets production requirements. Compared with traditional filters, it saves labor costs and reduces filter element replacement costs.

[0060] Therefore, the present invention adopts the above-mentioned high-efficiency sulfur concentrate filtration system and filtration method, which solves the problems of time-consuming and labor-intensive cleaning and replacement of filter elements, high cost and low filtration efficiency of traditional filters. It achieves the purpose of reducing production costs and labor intensity, improving sulfur concentrate filtration efficiency, meeting customer requirements for product moisture content, and avoiding the impact of measurement deviation on sales benefits.

[0061] It is worth noting that all the contents not described in detail in this invention are existing technologies and are well known to those skilled in the art.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A filtration method for a high-efficiency sulfur concentrate filtration system, characterized in that, The high-efficiency sulfur concentrate filtration system includes: A ceramic filter assembly, comprising a ceramic filter plate, wherein the micropores of the ceramic filter plate are matched with the particle size and distribution of the sulfur concentrate. A vacuum generating assembly, which is composed of a vacuum pump system and an ejector, is used to increase the vacuum level and vacuum flow rate. The vacuum pump system includes multiple vacuum pumps connected in parallel. A material concentration regulating mechanism adjusts the concentrate concentration by overflow. The material concentration regulating mechanism includes an overflow trough and an regulating baffle, and the regulating baffle is disposed inside the overflow trough. A material level control mechanism is used to adjust the material level in the ceramic filter tank. A spindle speed adjustment mechanism is provided, which adjusts the spindle speed according to the properties of the sulfur concentrate material. The spindle speed adjustment mechanism includes a variable frequency motor, which is connected to the spindle drive. The speed adjustment range of the variable frequency motor is 0-15 r / min. A backwashing unit adjusts the water pressure or air pressure according to the filtration effect; the backwashing unit includes a water storage tank, an air pump and pipelines, and the pipelines are respectively connected to the water storage tank, the air pump and the ceramic filter plate; An automatic control unit is provided, which automatically controls the system according to a preset program based on the concentration, liquid level, and vacuum degree. The automatic control unit includes a sensor and a controller. The sensor monitors the concentration, liquid level, and vacuum degree, and the controller controls each component according to the detected parameters and the preset program. The filtration method for a high-efficiency sulfur concentrate filtration system includes the following steps: S1. Select ceramic filter plates to match the micropores of the ceramic filter plates with the particle size and distribution of the sulfur concentrate. Select ceramic filter plates with high water permeability for the same pore size, and use large ceramic plates to increase the filtration area. S2. Adjust the vacuum level by using a vacuum pump system in conjunction with an ejector. S3. Adjust the material concentration by increasing the concentrate concentration through overflow, and balance the concentrate concentration and stirring effect by adjusting the overflow level. S4. Control the material level and select the optimal material level; S5. Set the spindle speed. Adjust the spindle speed according to the properties of the sulfur concentrate material. For viscous sulfur concentrate material, reduce the spindle speed; for easily formed sulfur concentrate material, increase the spindle speed to optimize the filter cake formation time, slurry thickness and filter cake drying degree. S6. Optimize backwashing: Adjust the water pressure or air pressure of the backwashing unit according to the filtration effect. The adjusted water pressure range is 0.2-0.5MPa, and the air pressure range is 0.3-0.6MPa. S7. Automatic control is performed by the automatic control unit according to the concentration, liquid level, and vacuum degree according to the preset program.

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