A high-temperature trona liquor decolorization and post-powder activated carbon filtration recovery device

Abstract

The utility model discloses a kind of high-temperature trona liquid decoloration after powder activated carbon filtration recovery devices, including, tank body, tank body is provided with raw liquid import, tank body inside is provided with inner convergence pipe, multiple groups of filter components are provided on inner convergence pipe, filter cloth is provided on filter component, outer tube is connected on inner convergence pipe, and clear liquid port and circulation port are respectively provided on outer tube, further include the pre-coating mechanism for providing activated carbon coating for filter cloth on filter component, pre-coating mechanism includes pre-coating jar one and pre-coating jar two.The utility model is by being provided with pre-coating mechanism, can form bottom layer skeleton on filter cloth surface first, then fill the gap with low concentration activated carbon to form dense surface layer, to effectively intercept tiny fine powder activated carbon, significantly reduce the risk of fine powder penetrating filter cloth pore, greatly improve the interception efficiency of fine powder of filtration device, guarantee the filtration effect, solve the problem of poor filtration effect caused by fine powder penetration of existing filter cloth type filtration device.

Description

Technical Field

[0001] This utility model relates to the field of activated carbon technology, specifically to a powdered activated carbon filtration and recovery device after decolorization with high-temperature natural alkali solution. Background Technology

[0002] After high-temperature alkaline decolorization, the powdered activated carbon (PAC) filtration and recovery device is the key equipment to achieve "decolorization-purification-resource recycling". Its core functions are to efficiently separate powdered activated carbon from the liquid phase (to avoid activated carbon loss and contamination of subsequent processes), recover activated carbon (to reduce consumable costs), and ensure the clarity of the filtrate.

[0003] In actual production, existing filter cloth-type powdered activated carbon filtration and recovery devices have the problem that, due to the wide particle size distribution of powdered activated carbon, some fine powder (especially particles with a particle size of less than 1 micrometer) may directly penetrate the pores of the filter cloth, thereby affecting the filtration effect. Utility Model Content

[0004] The purpose of this invention is to provide a powdered activated carbon filtration and recovery device for decolorization with high-temperature natural alkali solution, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A powdered activated carbon filtration and recovery device after decolorization with high-temperature natural alkali solution includes a tank body with a raw liquid inlet, an inner collecting pipe inside the tank body, multiple sets of filter components on the inner collecting pipe, filter cloth on the filter components, an outer pipe connected to the inner collecting pipe, and a clear liquid port and a circulation port on the outer pipe. It also includes a pre-coating mechanism for providing an activated carbon coating to the filter cloth on the filter components, the pre-coating mechanism comprising a pre-coating tank one and a pre-coating tank two containing high-concentration activated carbon material.

[0007] Preferably, the pre-coating tank is equipped with a pump body that cooperates with it, the outlet of the pump body is connected to the raw liquid inlet, and the inlet of the pre-coating tank is connected to the circulation port.

[0008] Preferably, the pre-coating mechanism further includes a filter aid adding structure, which includes a filter aid storage tank and a second pump body that can cooperate with the filter aid storage tank, and the outlet of the second pump body is connected to the interior of the first pre-coating tank through a pipe.

[0009] Preferably, the pre-coating tank 2 is provided with a pump body 3 that cooperates with it, and the outlet of the pump body 3 is connected to the raw liquid inlet, and the inlet of the pre-coating tank 2 is connected to the circulation port.

[0010] Preferably, both the first pre-coating tank and the second pre-coating tank are provided with a stirring structure, which includes a stirring component and a drive motor. The stirring component is rotatably installed inside both the first pre-coating tank and the second pre-coating tank. The output end of the first pre-coating tank and the second pre-coating tank are provided with a drive motor that is fixedly connected to one end of the stirring component.

[0011] Preferably, the outer pipe is also provided with a backflush port and a backwash port, the tank body is provided with an exhaust port, a safety valve port, a pressure gauge port and a spray port, and the bottom of the tank body is provided with a slag discharge port.

[0012] Preferably, the tank body is provided with a spraying mechanism inside, and the liquid inlet of the spraying mechanism is connected to the spray nozzle.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, by setting up a pre-coating mechanism, includes a pre-coating tank 1 and a pre-coating tank 2. As pump body 1 and pump body 3 pump high-concentration activated carbon material into the tanks, a filter aid is quantitatively delivered to the pre-coating tank 1 through a filter aid addition structure. The filter aid mixes with the activated carbon, first forming a bottom skeleton on the surface of the filter cloth, and then low-concentration activated carbon is added to fill the gaps to form a dense surface layer. This effectively intercepts tiny fine activated carbon powder, significantly reduces the risk of fine powder penetrating the filter cloth pores, greatly improves the retention efficiency of the filtration device for fine powder, ensures the filtration effect, and solves the problem of poor filtration effect caused by fine powder penetration in existing filter cloth filtration devices. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the outer tube structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the stirring component of this utility model.

[0018] In the diagram: 1. Tank body; 2. Raw material inlet; 3. Inner manifold; 4. Filter component; 5. Outer pipe; 6. Clean liquid outlet; 7. Circulation outlet; 8. Backflush outlet; 9. Backwash outlet; 10. Spraying mechanism; 11. Spray outlet; 12. Exhaust outlet; 13. Safety valve outlet; 14. Pressure gauge outlet; 15. Pre-coating tank one; 16. Pre-coating tank two; 17. Pump body one; 18. Pump body three; 19. Stirring component; 20. Drive motor; 21. Filter aid storage tank; 22. Pump body two; 23. Slag discharge outlet. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1-3A high-temperature natural alkali solution decolorization powdered activated carbon filtration and recovery device includes a tank 1, a raw liquid inlet 2 on the tank 1, an inner collecting pipe 3 inside the tank 1, multiple sets of filter components 4 on the inner collecting pipe 3, filter cloth on the filter components 4, an outer pipe 5 connected to the inner collecting pipe 3, and a clear liquid port 6 and a circulation port 7 on the outer pipe 5. It also includes a pre-coating mechanism for providing an activated carbon coating to the filter cloth on the filter components 4, the pre-coating mechanism including a pre-coating tank 1 15 and a pre-coating tank 2 16 containing high-concentration activated carbon material, a backflushing port 8 and a backwash port 9 on the outer pipe 5, an exhaust port 12, a safety valve port 13, a pressure gauge port 14 and a spray port 11 on the tank 1, and a slag discharge port 23 at the bottom of the tank 1. The tank 1 is equipped with a spray mechanism 10, and the inlet of the spray mechanism 10 is connected to the spray port 11. The tank 1 is the main container of the entire filtration and recovery device, providing installation space for the internal filter components 4, the internal collection pipe 3, etc., and forming a closed filtration environment to withstand the pressure of high-temperature alkaline solution and filtration process. It is the core place for achieving solid-liquid separation. The raw liquid inlet 2 is the channel for the raw liquid (the mixture of high-temperature alkaline solution and activated carbon to be filtered) and the high-concentration activated carbon material in the pre-coating stage to enter the tank 1. During pre-coating, it receives the pre-coating material conveyed by pump body 17 and pump body 3 18. During normal filtration, it receives the raw liquid to be treated. The internal collection pipe 3 is installed inside the tank 1 and connects to multiple sets of filter components 4. Its function is to collect the clear liquid after filtration by the filter components 4. The liquid is centrally transported to the outer pipe 5 for unified flow of the clarified liquid. The filter element 4 is the core functional component of the filter. The filter cloth on its surface is the basic medium for intercepting powdered activated carbon. During the pre-coating stage, an activated carbon coating is formed on the surface of the filter cloth. During normal filtration, the filter cloth and the coating work together to intercept fine powdered activated carbon, achieving solid-liquid separation. The outer pipe 5 connects to the inner collecting pipe 3, serving as the transport channel for the clarified liquid and circulating liquid. It also integrates the backflush port 8 and the backwash port 9 to achieve the diversion of the filtered liquid (discharge from the clarified liquid port 6 or return from the circulating port 7) and the reverse cleaning of the filter element 4. During normal filtration, the qualified clarified liquid intercepted by the filter element 4 passes through the inner collecting pipe 3 and the outer pipe 5, and is discharged from the clarified liquid port 6 to enter the subsequent production process. The circulating port 7 is a key channel in the pre-coating stage, preventing the filtered liquid from passing through the filter cloth. The completely intercepted activated carbon-containing liquid (circulating liquid) is returned to pre-coating tank 15 or pre-coating tank 2 16 to achieve the recycling of pre-coated materials until the circulating liquid is clear (pre-coating is complete). Backflush port 8 blows gas (such as compressed air) into the filter element 4 to remove the activated carbon filter cake trapped on the filter cloth and coating surface. Backwash port 9 introduces cleaning liquid (such as clean water or alkaline solution) into the filter element 4 for backwashing to remove fine powder and impurities remaining deep in the filter cloth, further cleaning the filter cloth and ensuring filtration efficiency. Spray mechanism 10 is installed inside tank 1 and connected to spray port 11. After receiving the cleaning liquid through spray port 11, it sprays and cleans the inner wall of tank 1 and the surface of filter element 4 to remove residual activated carbon and impurities in the tank, facilitating equipment maintenance.Spray port 11 provides the inlet of cleaning fluid for the spray mechanism 10, ensuring that the spray mechanism 10 can effectively clean the inside of the tank 1. Exhaust port 12 discharges gas from inside the tank 1, preventing gas accumulation and the formation of gas blockages that could affect liquid flow and filtration efficiency, while also balancing the pressure inside the tank. Safety valve port 13 is connected to a safety valve; when the pressure inside the tank 1 exceeds a set safety value, the safety valve automatically releases pressure to prevent damage to the tank 1 or safety accidents due to overpressure, ensuring safe operation of the device. Pressure gauge port 14 is equipped with a pressure gauge to monitor pressure changes inside the tank 1 in real time, allowing operators to monitor the pressure status during filtration, pre-coating, backflushing / backwashing processes, ensuring stable operation of the device. Slag discharge port 23 is used to discharge the filter cloth and activated carbon filter cake trapped on the surface of the coating inside the tank 1 when the gas backflushes the filter components 4.

[0023] Please see Figure 1 and Figure 3The pre-coating tank 15 is equipped with a pump body 17 that cooperates with it. The outlet of the pump body 17 is connected to the raw liquid inlet 2, and the inlet of the pre-coating tank 15 is connected to the circulation port 7. The pre-coating mechanism also includes a filter aid adding structure, which includes a filter aid storage tank 21 and a pump body 22 that can cooperate with the filter aid storage tank 21. The outlet of the pump body 22 is connected to the interior of the pre-coating tank 15 through a pipe. The pre-coating tank 26 is equipped with a pump body 3 18 that cooperates with it, and the outlet of the pump body 3 18 is connected to the... The raw material inlet is connected to phase 2, and the inlet of pre-coating tank 16 is connected to circulation port 7. Both pre-coating tank 15 and pre-coating tank 26 are equipped with a stirring structure, which includes a stirring component 19 and a drive motor 20. The stirring component 19 is rotatably installed inside both pre-coating tank 15 and pre-coating tank 26. The output end of the drive motor 20 is fixedly connected to one end of the stirring component 19 on both pre-coating tank 15 and pre-coating tank 26. Pre-coating tank 15 and pre-coating tank 26 are storage containers for pre-coated materials, containing high-concentration activated carbon materials. Pump body 17 provides power to pre-coating tank 15, pumping the high-concentration activated carbon material inside the tank into the raw liquid inlet 2, and sending it into tank 1 for pre-coating circulation, driving the pre-coating material to circulate between tank 1 and pre-coating tank 15. Pump body 3 18 provides power to pre-coating tank 2 16, pumping the high-concentration activated carbon material inside it into the raw liquid inlet 2, realizing pre-coating circulation between pre-coating tank 2 16 and tank 1, forming an alternating operation mode with pump body 17. The stirring component 19 and the drive motor 20 form a stirring structure, installed on pre-coating tank 15. Inside the pre-coating tank 16, the drive motor 20 rotates the stirring component 19 to keep the high-concentration activated carbon material in the tank in a uniform suspension state, avoiding uneven concentration caused by activated carbon sedimentation and ensuring stable concentration of pre-coated material. The filter aid storage tank 21 and the pump body 22 form a filter aid addition structure. The filter aid storage tank 21 stores filter aids (such as diatomaceous earth, perlite, etc.), and the pump body 22 quantitatively delivers the filter aid to the pre-coating tank 15, where it mixes with activated carbon to form a denser pre-coating layer, enhancing the interception ability of fine activated carbon and improving the filtration effect.

[0024] Working principle: First, a coating is prepared through a pre-coating mechanism. High-concentration activated carbon material in pre-coating tank 15 enters tank 1 through raw liquid inlet 2 under the action of pump 17. Simultaneously, pump 22 in the filter aid addition structure delivers filter aid from storage tank 21 to pre-coating tank 15, where it mixes with the activated carbon. The material passes through filter component 4 within tank 1. Uninterrupted activated carbon-containing liquid flows back to pre-coating tank 15 through inner collecting pipe 3 and outer pipe 5 via circulation port 7, forming a circulation until the circulating liquid is clear. This forms a bottom layer skeleton composed of high-concentration activated carbon and filter aid on the filter cloth surface. Subsequently, low-concentration activated carbon material in pre-coating tank 16 repeats a similar process under the action of pump 18, replenishing fine powder to fill gaps and forming a dense surface layer. Pre-coating is then complete. The high-temperature alkaline solution and activated carbon mixture to be filtered enter the tank 1 through the raw liquid inlet 2. Under pressure, the fine activated carbon powder is intercepted by the filter cloth and activated carbon coating on the surface of the filter component 4. The clear liquid enters the inner collection pipe 3 through the filter component 4 and is discharged from the clear liquid outlet 6 through the outer pipe 5. After filtration, gas is introduced through the backflush port 8 to backflush the filter component 4 and remove the activated carbon filter cake trapped on the surface. The filter cake is discharged from the slag discharge port 23 at the bottom of the tank 1. The cleaning liquid is introduced through the backwash port 9 for backwashing. At the same time, the spray port 11 sends the cleaning liquid to the spray mechanism 10 to spray and clean the inner wall of the tank 1 and the filter component 4. During the process, the exhaust port 12 discharges the gas in the tank, the safety valve port 13 ensures pressure safety, and the pressure gauge port 14 monitors the pressure in real time.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A powdered activated carbon filtration and recovery device after decolorization with high-temperature natural alkali solution, comprising: a tank (1), wherein the tank (1) is provided with a raw liquid inlet (2), an inner collecting pipe (3) is provided inside the tank (1), a plurality of filter components (4) are provided on the inner collecting pipe (3), filter cloth is provided on the filter components (4), an outer pipe (5) is connected to the inner collecting pipe (3), and a clear liquid port (6) and a circulation port (7) are respectively provided on the outer pipe (5), characterized in that: It also includes a pre-coating mechanism for providing an activated carbon coating to the filter cloth on the filter element (4), the pre-coating mechanism comprising a pre-coating tank one (15) and a pre-coating tank two (16) containing high concentrations of activated carbon material.

2. The powdered activated carbon filtration and recovery device after high-temperature natural alkali decolorization according to claim 1, characterized in that: The pre-coating tank (15) is equipped with a pump body (17) that works with it. The outlet of the pump body (17) is connected to the raw liquid inlet (2), and the inlet of the pre-coating tank (15) is connected to the circulation port (7).

3. The powdered activated carbon filtration and recovery device after high-temperature natural alkali decolorization according to claim 2, characterized in that: The pre-coating mechanism also includes a filter aid adding structure, which includes a filter aid storage tank (21) and a second pump body (22) that can cooperate with the filter aid storage tank (21). The outlet of the second pump body (22) is connected to the interior of the first pre-coating tank (15) through a pipe.

4. The powdered activated carbon filtration and recovery device after high-temperature natural alkali decolorization according to claim 3, characterized in that: The pre-coating tank 2 (16) is equipped with a pump body 3 (18) that cooperates with it, and the outlet of the pump body 3 (18) is connected to the raw liquid inlet (2), and the inlet of the pre-coating tank 2 (16) is connected to the circulation port (7).

5. The powdered activated carbon filtration and recovery device after high-temperature natural alkali decolorization according to claim 4, characterized in that: Both the first pre-coating tank (15) and the second pre-coating tank (16) are equipped with a stirring structure, which includes a stirring component (19) and a drive motor (20). The stirring component (19) is rotatably installed inside both the first pre-coating tank (15) and the second pre-coating tank (16). The first pre-coating tank (15) and the second pre-coating tank (16) are equipped with a drive motor (20) whose output end is fixedly connected to one end of the stirring component (19).

6. The powdered activated carbon filtration and recovery device after high-temperature natural alkali decolorization according to claim 1, characterized in that: The outer pipe (5) is also provided with a backflush port (8) and a backwash port (9), and the tank body (1) is provided with an exhaust port (12), a safety valve port (13), a pressure gauge port (14) and a spray port (11), and the bottom of the tank body (1) is provided with a slag discharge port (23).

7. The powdered activated carbon filtration and recovery device after high-temperature natural alkali decolorization according to claim 6, characterized in that: The tank (1) is equipped with a spraying mechanism (10), and the inlet of the spraying mechanism (10) is connected to the spraying port (11).

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