Activated carbon for sewage treatment and preparation method thereof

Abstract

The invention relates to an activated carbon for sewage treatment and a preparation method thereof, which comprises the following steps: crushing raw materials to a set particle size to produce three kinds of materials with particle size gradients; carbonizing the three kinds of materials with particle sizes according to a set mass ratio; activating the carbonized materials and introducing activators such as water vapor, carbon dioxide and potassium hydroxide; washing, drying and screening the activated activated carbon and classifying them according to particle sizes; counting the mass of various activated carbons, selecting a part to grind into powder, and subjecting it to microwave treatment for standby use; hot-pressing composite coarse particles and standard activated carbon to prepare prefabricated blocks A and B, and adding adhesive and auxiliary agents; trimming the butt joint surface of the prefabricated block A, coating it with activated carbon powder and covering it with a composite film; hot-pressing butt jointing the prefabricated blocks A and B to obtain an activated carbon adsorption unit element, thereby realizing efficient and automated production of the activated carbon adsorption unit element, and the obtained activated carbon adsorption unit element with a multi-layer particle size structure and a multi-layer particle size structure can easily meet the multi-stage adsorption requirements in sewage treatment.

Description

Technical Field

[0001] The present invention relates to activated carbon for sewage treatment and a preparation method thereof, and in particular to activated carbon for sewage treatment and a preparation method thereof, which are applied in the field of activated carbon. Background Art

[0002] As a key equipment in the field of water treatment, the technical background and application value of activated carbon filters cannot be ignored. With the rapid development of industrialization and urbanization, the demand for water resources and pollution problems have become increasingly prominent, so the requirements for water purification are also getting higher and higher. As a highly efficient water treatment equipment, activated carbon filters are gradually becoming an important choice in the field of water purification. The highly efficient activated carbon filled inside them has the characteristics of large specific surface area and strong adsorption capacity, which can greatly improve the degree of purification of produced water.

[0003] In order to solve the problem of screening good quality activated carbon particles, a certain activated carbon preparation method on the market adopts a multi-stage screening design and has a certain market share.

[0004] The Chinese invention patent CN113894030B specification discloses a preparation system of granular activated carbon for sewage treatment adsorbent, including a treatment chamber, a feed port fixedly connected to the upper outer surface of the treatment chamber near the edge of one side, a drying chamber fixedly connected to the outer surface of one side of the treatment chamber, a water spray head fixedly connected to the inner upper surface of the treatment chamber, a first support plate fixedly connected to one side of the inner bottom of the treatment chamber, a connecting port opened at the connection between the treatment chamber and the drying chamber, and a second support plate fixedly connected to the inner wall of the treatment chamber at the lower end of the connecting port, and a filter screen fixedly connected between the first support plate and the second support plate. The invention achieves screening of activated carbon particles of different sizes by adjusting the staggered filter holes between the first filter plate and the second filter plate, thereby screening out damaged activated carbon particles, and the electric telescopic rod pushes the second filter plate back and forth to avoid the problem of filter hole clogging during the screening process.

[0005] In the existing activated carbon production process, most of the activated carbon particles with a fixed particle size are used to prepare adsorbents for sewage treatment. It is difficult to balance the raw material cost, production efficiency and product quality, and it is inconvenient to recycle the activated carbon particles with a required particle size that are produced during production. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that in the existing activated carbon production process, most of the activated carbon particles with a fixed particle size are used to prepare adsorbents for sewage treatment, which makes it difficult to balance the raw material cost, production efficiency and product quality, and it is inconvenient to recycle the activated carbon particles with a part of the output and the required particle size during production.

[0007] In order to solve the above problems, the present invention provides an activated carbon for sewage treatment and a preparation method thereof. The preparation of the activated carbon comprises the following steps:

[0008] A1, crushing the raw materials into a set particle size range, and crushing to produce raw materials with three particle size gradients;

[0009] A2, the raw materials of three particle size gradients are respectively input into the carbonization equipment according to the set mass ratio for carbonization treatment;

[0010] A3, activating the carbonized material by introducing an activator to increase its specific surface area and adsorption capacity; the activator includes water vapor, carbon dioxide and potassium hydroxide;

[0011] A4, washing and drying the activated carbon, weighing it and then performing multi-stage screening; after the activated carbon is graded and screened, it is classified into fine activated carbon, standard activated carbon, coarse activated carbon and other activated carbon according to the particle size; the minimum particle size of the standard activated carbon is larger than the maximum particle size of the fine activated carbon, and the maximum particle size is smaller than the minimum particle size of the coarse activated carbon;

[0012] A5, collect statistics on the mass of fine activated carbon, coarse activated carbon, standard activated carbon and other activated carbon, select part of the activated carbon and grind it into activated carbon powder according to the statistical results, perform microwave treatment on the activated carbon powder obtained by grinding, and then store it for later use;

[0013] A6, coarse activated carbon and standard activated carbon are compounded by hot pressing to form prefabricated blocks A and B of equal sizes, and bonding agents and auxiliary agents are added during the compounding process. The auxiliary agents include antibacterial agents, catalytic agents and reinforcing agents;

[0014] The bonding aid is made by mixing fine-grained activated carbon with a bonding agent;

[0015] A7, trimming the butt joint surface of the prefabricated block A made of coarse activated carbon. During the trimming, activated carbon powder is applied to the end surface of the prefabricated block A and pressed to be flat, and then the surface is covered with a composite film containing activated carbon powder;

[0016] A8, hot-pressing and docking the prefabricated block A and the prefabricated block B to obtain an activated carbon adsorption unit component.

[0017] In the above-mentioned activated carbon for sewage treatment and its preparation method, a composite adsorption unit of activated carbon with multiple particle sizes can be prepared from a single raw material.

[0018] As a further improvement of the present application, the composite membrane includes a filter membrane coated with activated carbon powder and an antibacterial agent, the base membrane includes a biological filter membrane and a filter screen, and a catalytic aid or an enhancing aid is added to the prefabricated block A and the prefabricated block B.

[0019] As a further improvement of the present application, an antibacterial agent is added to the prefabricated block A made of coarse activated carbon in A6; and a catalytic agent is added to the prefabricated block B made of standard activated carbon particles.

[0020] As a further improvement of the present application, when selecting activated carbon in A5, other activated carbon particles are preferred, and fine-grained activated carbon particles are secondarily preferred; activated carbon whose particle size is not within the particle size range of fine-grained activated carbon, standard activated carbon and coarse-grained activated carbon is classified as other activated carbon particles.

[0021] As another improvement of the present application, when calculating the mass of activated carbon in A5, the mass of activated carbon particles of each category and the mass proportion of activated carbon particles relative to the total output are calculated.

[0022] As another improvement of the present application, in the statistical results of A5, when the mass proportion of activated carbon particles of any category relative to the total output of activated carbon exceeds the set value, an alarm is triggered and the preparation work is suspended.

[0023] As another improvement of the present application, the prefabricated block A and the prefabricated block B in A6 are formed by hot pressing in a hot pressing mold, the hot pressing mold includes a lower mold and an upper mold that match each other, the lower mold is provided with a plurality of evenly distributed hot pressing grooves, the upper mold is provided with a plurality of hot pressing holes that match the hot pressing grooves, an auxiliary frame is provided between the lower mold and the upper mold, the auxiliary frame includes a main bracket that matches the lower mold, a movable plate is slidably provided at one end of the main bracket, and a plurality of through holes that match the hot pressing holes are provided on the movable plate, and a pressing groove is provided at the opening of the through hole;

[0024] An electric push rod is connected between the upper mold and the main bracket, a first hot press is arranged at the lower side of the main bracket, and a plurality of first hot press columns matching the hot press holes are installed at the working end of the first hot press;

[0025] A lifting bearing cover is arranged on the upper side of the first hot press, and a plurality of bearing columns matching the hot pressing holes are installed at the lower end of the lifting bearing cover;

[0026] A second hot pressing device matching the lower mold is arranged on the upper side of the lower mold, and a second hot pressing column matching the hot pressing groove is arranged at the working end of the second hot pressing device.

[0027] As a supplement to another improvement of the present application, a punching ring matching the pressing groove is installed at the outer end of the second hot pressing column, and a punching blade is installed at the outer end of the punching ring.

[0028] As a supplement to another improvement of the present application, the depth of the hot pressing groove and the hot pressing hole are both greater than the thickness of the prefabricated block A and the prefabricated block B after being composited.

[0029] In summary, the efficient and automated production of activated carbon adsorption units is achieved, activated carbon particles of different particle sizes in the production can be effectively utilized, and the obtained activated carbon adsorption units with a multi-layer particle size structure have a multi-layer particle size structure, which can easily meet the multi-stage adsorption requirements in sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of the preparation method of the first embodiment of the present application;

[0031] Figure 2 This is a three-dimensional diagram of a hot pressing mold according to the second embodiment of the present application;

[0032] Figure 3 A three-dimensional diagram of a hot pressing mold when hot pressing and docking prefabricated block A and prefabricated block B in the first and second embodiments of the present application;

[0033] Figure 4 This is an exploded view of the hot pressing mold of the second embodiment of the present application;

[0034] Figure 5 A side cross-sectional view of a hot pressing mold according to a second embodiment of the present application;

[0035] Figure 6 It is a cross-sectional view of the hot pressing mold when the prefabricated block A and the prefabricated block B are hot pressed and docked in the first and second embodiments of the present application;

[0036] Figure 7 This is a state change diagram of the preparation process of prefabricated block A and prefabricated block B in the first and second embodiments of the present application.

[0037] Description of the numbers in the figure:

[0038] 1 lower mold, 2 upper mold, 3 auxiliary frame, 301 main support, 302 movable plate, 303 first hot press, 304 lifting bearing cover, 305 bearing column. DETAILED DESCRIPTION

[0039] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0040] The first implementation method:

[0041] Figure 1-7 It is shown that an activated carbon for sewage treatment and a preparation method thereof, the preparation of the activated carbon comprises the following steps:

[0042] A1, crushing the raw materials into a set particle size range, and crushing to produce raw materials with three particle size gradients;

[0043] A2, the raw materials of three particle size gradients are respectively input into the carbonization equipment according to the set mass ratio for carbonization treatment;

[0044] A3, activating the carbonized material by introducing an activator to increase its specific surface area and adsorption capacity; the activator includes water vapor, carbon dioxide and potassium hydroxide;

[0045] A4, washing and drying the activated carbon, weighing it and then performing multi-stage screening; after the activated carbon is graded and screened, it is classified into fine activated carbon, standard activated carbon, coarse activated carbon and other activated carbon according to the particle size; the minimum particle size of the standard activated carbon is larger than the maximum particle size of the fine activated carbon, and the maximum particle size is smaller than the minimum particle size of the coarse activated carbon;

[0046] A5, collect statistics on the mass of fine activated carbon, coarse activated carbon, standard activated carbon and other activated carbon, select part of the activated carbon and grind it into activated carbon powder according to the statistical results, perform microwave treatment on the activated carbon powder obtained by grinding, and then store it for later use;

[0047] When selecting activated carbon in A5, other activated carbon particles are preferred, and fine activated carbon particles are second; activated carbon with a particle size that is not within the particle size range of fine activated carbon, standard activated carbon, and coarse activated carbon is classified as other activated carbon particles;

[0048] When counting the mass of activated carbon, count the mass of activated carbon particles of each category and the mass proportion of activated carbon particles relative to the total output; in the statistical results, if the mass proportion of activated carbon particles of any category relative to the total output of activated carbon exceeds the set value, an alarm will be issued and the preparation work will be suspended (some small-sized activated carbon may be produced during the production of large-sized raw materials. If a large number of activated carbon particles with a large difference in particle size from the raw materials are produced, it means that the production is abnormal and the production needs to be suspended for adjustment);

[0049] A6, coarse activated carbon and standard activated carbon are compounded by hot pressing to form prefabricated blocks A and B of equal sizes, and bonding agents and auxiliary agents are added during the compounding process. The auxiliary agents include antibacterial agents, catalytic agents and reinforcing agents; the catalytic agents are used to improve the catalytic activity and adsorption performance, and the technicians in this field select appropriate catalytic agents to add, such as alumina and HY molecular sieve;

[0050] The reinforcing agent is used to increase the mechanical strength and improve the adsorption performance. The technicians in this field can select suitable reinforcing agents to add, such as plasticizers and lubricants;

[0051] The bonding aid is made by mixing fine-grained activated carbon with a bonding agent;

[0052] A7, trimming the butt joint surface of the prefabricated block A made of coarse activated carbon. During the trimming, activated carbon powder is applied to the end surface of the prefabricated block A and pressed to be flat, and then the surface is covered with a composite film containing activated carbon powder;

[0053] The composite membrane includes a filter membrane, on which activated carbon powder and an antibacterial agent may be coated, the base membrane includes a biological filter membrane and a filter screen, and a catalytic aid or an enhancing aid is added to the prefabricated block A and the prefabricated block B; the antibacterial agent is used to improve the antibacterial effect of the composite membrane;

[0054] A8, hot-pressing and docking the prefabricated block A and the prefabricated block B to obtain an activated carbon adsorption unit component.

[0055] Optionally, the fine-grained activated carbon can be combined with a filter membrane or filter screen and then used to surface finish the coarse-grained prefabricated block;

[0056] Optionally, an antibacterial agent is added to the prefabricated block A made of coarse activated carbon in A6; a catalytic agent is added to the prefabricated block B made of standard activated carbon, and the activated carbon adsorption unit obtained by combining the prefabricated block B and the prefabricated block A ensures the antibacterial effect through the prefabricated block A;

[0057] In this scheme, after the activated carbon is screened out, the large-particle activated carbon and the standard-particle activated carbon are prefabricated into blocks and then compounded. Before compounding, the end surface of the prefabricated block made of large-particle activated carbon is smoothed by small-particle activated carbon to form an activated carbon adsorption unit with multiple layers of activated carbon screening layers. The activated carbon adsorption unit is made of the same material at one time. The activated carbon adsorption unit can easily meet the multi-stage adsorption requirements in sewage treatment and can also be easily produced quickly.

[0058] In this solution, activated carbon is finely divided into fine particles, standard particles, coarse particles and other particle size ranges through multi-stage screening, which helps to meet the specific requirements of activated carbon particle size in different sewage treatment scenarios and improves adsorption efficiency and applicability.

[0059] Moreover, the antibacterial additives, catalytic additives and reinforcing additives added during the hot pressing composite process not only enhance the adsorption performance of activated carbon, but also give it additional functions such as antibacterial and catalytic functions, further improving the comprehensive effect of activated carbon in sewage treatment.

[0060] The activated carbon is made into prefabricated blocks through hot pressing composite technology, and then further combined into activated carbon adsorption units. The activated carbon adsorption units have a multi-layer particle size structure, which can simultaneously meet the multi-stage adsorption requirements in sewage treatment and improve the application flexibility of the product. According to specific needs, it is easy to adjust the particle size classification of activated carbon, the amount of additives added, and the combination of prefabricated blocks to achieve customized product design.

[0061] This solution classifies and recycles activated carbon that does not meet the particle size requirements, achieving the recycling of resources and reducing waste.

[0062] Second implementation method:

[0063] Figure 2-7As shown, the prefabricated block A and the prefabricated block B in A6 are formed by hot pressing in a hot pressing mold, and the hot pressing mold includes a lower mold 1 and an upper mold 2 that match each other, the lower mold 1 is provided with a plurality of evenly distributed hot pressing grooves, the upper mold 2 is provided with a plurality of hot pressing holes that match the hot pressing grooves, an auxiliary frame 3 is arranged between the lower mold 1 and the upper mold 2, the auxiliary frame 3 includes a main bracket 301 that matches the lower mold 1, a movable plate 302 is slidably arranged at one end of the main bracket 301, and a plurality of through holes that match the hot pressing holes are arranged on the movable plate 302, and a pressing groove is arranged at the opening of the through hole; the movable plate 302 is used for laying a composite film, and a composite film covering the movable plate 302 is arranged thereon, and it can also be arranged as a composite film sheet covering the hot pressing holes. After the movable plate 302 is aligned with the lower mold 1, the composite film on the movable plate 302 can be pressed onto the end surface of the prefabricated block A formed in the lower mold 1 by a second hot pressing device;

[0064] After the positions of the lower mold 1 and the upper mold 2 are matched, the hot pressing groove and the hot pressing hole are aligned, and the prefabricated block B formed in the upper mold 2 can be pressed into the hot pressing groove of the lower mold 1 by the second hot pressing device, so that the prefabricated block A and the prefabricated block B are butt-jointed and composited;

[0065] The lower mold 1 and the upper mold 2 can be detachably connected to the auxiliary frame 3; the hot pressing groove of the lower mold 1 is filled with activated carbon, gluing aids and auxiliary aids and then inserted into the auxiliary frame 3; the lower mold 1 can be taken out after the hot pressing work, and activated carbon powder can be added to the hot pressing groove through other feeding equipment to prepare for repairing the end face of the prefabricated block A;

[0066] An electric push rod is connected between the upper mold 2 and the main bracket 301, and the movable end of the electric push rod is clamped with the side end of the upper mold 2. A first hot press 303 is arranged on the lower side of the main bracket 301, and a plurality of first hot press columns matching the hot press holes are installed on the working end of the first hot press 303; the upper part of the main bracket 301 is C-shaped, and the upper mold 2 is slidably arranged in the main bracket 301. Sealing pads are arranged at both the upper and lower ends of the upper mold 2, and the sealing pads are used to ensure that the activated carbon particles in the upper mold 2 are not easy to leak out when the upper mold 2 is displaced;

[0067] A lifting bearing cover 304 is arranged on the upper side of the first hot press 303, and the lifting bearing cover 304 is installed on the upper part of the main support 301. A plurality of bearing columns 305 matching the hot pressing holes are installed at the lower end of the lifting bearing cover 304, and a hydraulic cylinder is connected between the lifting bearing cover 304 and the main support 301; when the lifting bearing cover 304 descends, the bearing columns 305 are inserted into the upper mold 2, and at this time, the first hot press 303 can be used to perform hot pressing on the activated carbon particles in the upper mold 2; when the bearing cover 304 rises, the bearing columns 305 are separated from the upper mold 2, and at this time, the upper mold 2 can be driven to move;

[0068] A second hot pressing device matching the lower mold 1 is arranged on the upper side of the lower mold 1, and a second hot pressing column matching the hot pressing groove is arranged at the working end of the second hot pressing device;

[0069] The upper part of the main support 301 is connected with a row of auxiliary material delivery pipes located between the second hot pressing device and the lifting bearing cover 304. When the upper mold 2 is driven to the auxiliary material delivery pipe, the material can be delivered to the hot pressing hole through the auxiliary material delivery pipe;

[0070] The outer end of the second hot pressing column is equipped with a punching ring matching the pressing groove. The punching ring is limited and slides outside the second hot pressing column. The outer end of the punching ring is equipped with a punching blade. When the composite film is a large-scale membrane, it can be punched by the second hot pressing column.

[0071] The depths of the hot pressing grooves and hot pressing holes are greater than the thickness of the prefabricated block A and the prefabricated block B after being composited, ensuring that the depth of the hot pressing grooves of the lower mold 1 is sufficient for the final composite molding of the prefabricated block A and the prefabricated block B.

[0072] In addition, for the heating of the lower mold 1 and the upper mold 2, existing technical methods such as setting electric heating wires or infrared heating on the auxiliary frame 3 can be adopted, or a heat-conducting structure can be set in the lower mold 1 and the upper mold 2 to ensure that the activated carbon particles are heated evenly during the hot pressing process and ensure the stability of the product.

[0073] This embodiment realizes the automated hot pressing forming and automated docking and bonding of prefabricated block A and prefabricated block B, reduces the tediousness of manual operation, and improves production efficiency. Moreover, through the provision of a second hot pressing device and a punching ring, punching of the composite film can be achieved, so that the composite film fits more closely to the end face of prefabricated block A, thereby improving product quality.

[0074] In further optimization, the equipment can also be equipped with an automatic feeding device and a mold pulling structure on the side of the main support 301 to facilitate the removal and insertion of the mold and the automatic feeding of the prefabricated activated carbon particles into the hot pressing holes or hot pressing grooves of the upper mold 2 and the lower mold 1, thereby further improving production efficiency.

[0075] According to actual needs, the shape, size, and arrangement of the hot pressing holes and hot pressing grooves of the upper mold 2 and the lower mold 1 can be adjusted in this embodiment to adapt to the production of prefabricated blocks A and prefabricated blocks B of different specifications and requirements. At the same time, a PLC control system can be used for the control system of the equipment to achieve precise control of the entire production process and ensure product quality and production efficiency.

[0076] This embodiment realizes efficient and automated production of prefabricated block A, prefabricated block B and activated carbon adsorption unit components through optimization means such as automated docking and compounding, automated feeding and precise control, and has broad application prospects and market value.

[0077] In summary, this scheme realizes the efficient and automated production of activated carbon adsorption units. Activated carbon particles of different particle sizes in production can be effectively utilized, and the obtained activated carbon adsorption units with a multi-layer particle size structure have a multi-layer particle size structure, which can easily meet the multi-stage adsorption requirements in sewage treatment.

[0078] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A method for preparing activated carbon for sewage treatment, characterized in that: The preparation of the activated carbon comprises the following steps: A1, crushing the raw materials into a set particle size range, and crushing to produce raw materials with three particle size gradients; A2, the raw materials of three particle size gradients are respectively input into the carbonization equipment according to the set mass ratio for carbonization treatment; A3, activating the carbonized material by introducing an activator to increase its specific surface area and adsorption capacity; the activator includes water vapor, carbon dioxide and potassium hydroxide; A4, washing and drying the activated carbon, weighing it and then performing multi-stage screening; after the activated carbon is graded and screened, it is classified into fine-grained activated carbon, standard activated carbon, coarse-grained activated carbon and other activated carbon according to the particle size; the minimum particle size of the standard activated carbon is larger than the maximum particle size of the fine-grained activated carbon, and the maximum particle size is smaller than the minimum particle size of the coarse-grained activated carbon; A5, collect statistics on the mass of fine activated carbon, coarse activated carbon, standard activated carbon and other activated carbon, select part of the activated carbon and grind it into activated carbon powder according to the statistical results, perform microwave treatment on the activated carbon powder obtained by grinding, and then store it for later use; When selecting activated carbon in A5, other activated carbon particles are preferred, and fine activated carbon particles are secondarily selected; activated carbon whose particle size is not within the particle size range of fine activated carbon, standard activated carbon and coarse activated carbon is classified as other activated carbon particles; When calculating the activated carbon mass in A5, the mass of activated carbon particles of each category and the mass proportion of activated carbon particles relative to the total output are calculated; In the statistical results of A5, when the mass ratio of activated carbon particles of any category relative to the total output of activated carbon exceeds the set value, an alarm is triggered and the preparation work is suspended. A6, the coarse activated carbon and the standard activated carbon are compounded by hot pressing to form prefabricated blocks A and B of equal sizes, and a bonding agent and an auxiliary agent are added during the compounding process, wherein the auxiliary agent includes an antibacterial agent, a catalytic agent and a reinforcing agent; The bonding aid is made by mixing fine-grained activated carbon with a bonding agent; The catalyst promoter is used to improve the catalytic activity and improve the adsorption performance, and is aluminum oxide and HY molecular sieve; the reinforcing agent is used to improve the mechanical strength and improve the adsorption performance, and is a plasticizer and a lubricant; The antibacterial agent is added to the prefabricated block A made of coarse activated carbon in A6; the catalytic agent is added to the prefabricated block B homogenized from standard activated carbon; A7, trimming the butt joint surface of the prefabricated block A made of coarse activated carbon. During the trimming, activated carbon powder is applied to the end surface of the prefabricated block A and pressed to be flat, and then the surface is covered with a composite film containing activated carbon powder; A8, hot-pressing and docking the prefabricated block A and the prefabricated block B to obtain an activated carbon adsorption unit; The composite membrane comprises a filter membrane, on which activated carbon powder and an antibacterial agent are coated.

2. The method for preparing activated carbon for sewage treatment according to claim 1, characterized in that: The prefabricated block A and the prefabricated block B in A6 are formed by hot pressing in a hot pressing mold, wherein the hot pressing mold comprises a lower mold (1) and an upper mold (2) that match each other, the lower mold (1) is provided with a plurality of evenly distributed hot pressing grooves, the upper mold (2) is provided with a plurality of hot pressing holes that match the hot pressing grooves, an auxiliary frame (3) is arranged between the lower mold (1) and the upper mold (2), the auxiliary frame (3) comprises a main support (301) that matches the lower mold (1), a movable plate (302) is slidably arranged at one end of the main support (301), and a plurality of through holes that match the hot pressing holes are arranged on the movable plate (302), and a pressing groove is arranged at the opening of the through hole; An electric push rod is connected between the upper mold (2) and the main support (301); a first hot press (303) is arranged at the lower side of the main support (301); a plurality of first hot press columns matching the hot press holes are installed at the working end of the first hot press (303); A lifting bearing cover (304) is arranged on the upper side of the first hot press (303), and a plurality of bearing columns (305) matching the hot press holes are installed at the lower end of the lifting bearing cover (304); A second hot pressing device matching the lower mold (1) is arranged on the upper side of the lower mold (1), and a second hot pressing column matching the hot pressing groove is arranged at the working end of the second hot pressing device.

3. The method for preparing activated carbon for sewage treatment according to claim 2, characterized in that: The outer end of the second hot pressing column is equipped with a punching ring matching the pressing groove, and the outer end of the punching ring is equipped with a punching blade. Through the arrangement of the second hot pressing device and the punching ring, the composite film can be punched so that the composite film fits the end face of the prefabricated block A more closely.

4. The method for preparing activated carbon for sewage treatment according to claim 2, characterized in that: The depths of the hot pressing grooves and the hot pressing holes are both greater than the thickness of the prefabricated block A and the prefabricated block B after being combined.

5. An activated carbon adsorption unit for sewage treatment obtained by the preparation method according to any one of claims 1 to 4.

Images