Method and system for preparing adsorbing material in coordination with coking solid waste

Abstract

This invention discloses a method and system for co-preparing adsorbent materials from coking solid waste, belonging to the field of coking waste treatment technology. The method includes: S1, dehydrating and reducing the viscosity of tar residue; dehydrating and crushing coking biochemical sludge; drying, pulverizing, and sieving waste activated carbon and waste desulfurizing agent; S2, mixing and homogenizing tar residue, coking biochemical sludge, waste activated carbon, and waste desulfurizing agent in a specific ratio to obtain a mixture; S3, pressing or extruding the mixture to obtain a green body; S4, feeding the green body into a rotary kiln and carbonizing it in stages under a low-oxygen atmosphere with an oxygen content ≤3% to obtain carbonized particles; during carbonization, the calcium-based mineral phase provided by the waste desulfurizing agent reacts with the sulfur-containing components released by the system to form a stable sulfate or sulfide phase, achieving in-situ sulfur fixation and mineralization; S5, activating the carbonized particles by introducing steam at 800℃~1000℃ to construct a microporous structure and obtain the adsorbent material.

Description

Technical Field

[0001] This invention belongs to the field of coking waste treatment technology, and in particular relates to a method and system for co-preparing adsorbent materials from coking solid waste. Background Technology

[0002] The coking industry generates various solid wastes during production and related wastewater and waste gas treatment processes, including tar residue, biochemical sludge, spent activated carbon, and spent desulfurizing agents. These solid wastes typically suffer from high moisture content, complex composition, sulfur content or saturated pollutants, difficulty in stabilization, and high costs for off-site disposal. Existing treatment methods, such as single incineration, separate pyrolysis, thermal desorption, solidification and landfill, or off-site disposal, often have the following shortcomings: (1) A single disposal route is difficult to balance reduction, stabilization and high-value utilization; (2) Sulfur-containing components may migrate during heat treatment, which may lead to corrosion or secondary pollution risks; (3) The pore structure of waste activated carbon and sludge carbonization products is not fully utilized, resulting in large fluctuations in the performance of the prepared materials, making it difficult to stably reach the adsorption index. (4) Insufficient process continuity and product consistency make it difficult to form a closed-loop resource utilization route that can be industrialized. Summary of the Invention

[0003] To address the above-mentioned technical deficiencies, this invention provides a method and system for the co-preparation of adsorbent materials from coking solid waste, thereby solving the problems of high environmental pollution risk, low resource recovery rate, and difficulty in reuse in the existing technology, and realizing the co-processing of reduction, harmlessness, and resource utilization of coking waste.

[0004] To achieve the above-mentioned technical objectives, the present invention is implemented through the following technical solution: The first objective of this invention is to provide a method for co-preparing adsorbent materials from coking solid waste, comprising: S1. Raw material pretreatment: Dehydration and viscosity reduction treatment of tar residue; dehydration and crushing of coking biochemical sludge; drying, pulverizing and screening of waste activated carbon and waste desulfurizing agent; S2. Mixing and proportioning: The pretreated tar residue, coking biochemical sludge, waste activated carbon and waste desulfurizing agent are mixed and homogenized in a specific ratio to obtain a mixture; wherein, the waste desulfurizing agent is used as an in-situ sulfur-fixing agent and an inorganic framework regulator. S3. Molding: The mixture is pressed into pellets or extruded into a blank to obtain a green body; S4. Low-oxygen segmented carbonization: The billet is fed into a rotary kiln and carbonized in segments under a low-oxygen atmosphere with an oxygen content of ≤3% to obtain carbonized particles; during the carbonization process, the calcium-based mineral phase provided by the waste desulfurizing agent reacts with the sulfur-containing components released by the system to form a sulfate or sulfide stable phase, thereby achieving in-situ solid sulfur mineralization. S5. Steam activation: The carbonized particles are activated by passing steam through them at 800℃~1000℃ to construct a microporous structure and obtain the adsorbent material.

[0005] Furthermore, S1 includes: The tar residue is dehydrated by centrifugation or pressure filtration to bring the moisture content to 10%–15%. The coking biochemical sludge is dewatered to 20%–30% and then crushed; Waste activated carbon is crushed and screened to control the particle size to ≤5mm; Waste desulfurizing agent is dried, crushed and screened to control the particle size ≤3mm, and lumps and hard impurities are removed.

[0006] Furthermore, the dehydration and viscosity reduction treatment of the tar residue includes: adding a demulsifier to the heated and stirred tar residue to demulsify, reduce viscosity, promote stratification, and remove hard impurities; Under stirring conditions, add demulsifier at 0.5wt% to 1wt% of the wet basis weight of tar residue. After addition, mechanical stirring is required to ensure that the demulsifier is in full contact with the emulsion. The stirring speed is 200 rpm to 500 rpm. At the same time, the viscosity of the liquid is reduced by heating to 50℃ to 80℃. After stirring for 10 min to 30 min, let it stand for 30 min to 120 min to separate the phases. The separated aqueous phase is then discharged to obtain the tar residue after viscosity reduction.

[0007] Furthermore, in S2, by mass percentage: tar residue 18%–25%; coking biochemical sludge 40%–50%; waste activated carbon 20%–30%; waste desulfurizing agent 8%–15%.

[0008] Furthermore, the process begins with graded premixing: waste activated carbon and waste desulfurizing agent are first put into a dry mixer and dry-mixed for 3 to 5 minutes to obtain a mineral-carbon powder premix; then coking biochemical sludge is added and mixed for 5 to 8 minutes; finally, tar residue is added and mixed for 10 to 20 minutes to form a uniform mixture. Then adjust the water content / plasticity: adjust the plasticity of the mixture according to the molding requirements during the mixing process; when the mixture is too dry and difficult to granulate / extrude, add water or reuse the recycled material; when the mixture is too wet and easy to stick, appropriately extend the dry mixing time or add dry material.

[0009] Furthermore, S3 includes: The mixture is granulated, extruded, or briquetteed to obtain granules or strip-shaped preforms; the particle size is 5mm to 10mm.

[0010] After molding, it undergoes low-temperature pre-drying.

[0011] Furthermore, the temperature range for the low-temperature pre-drying is 60℃~80℃.

[0012] Furthermore, S4 includes: The billet is fed into the rotary kiln, and the key control conditions include: oxygen content in the rotary kiln ≤3%; carbonization temperature 300℃~700℃; carbonization residence time 30min~60min; The segmented heating process consists of two temperature stages: the first stage is 300℃~500℃, and the second stage is 500℃~700℃.

[0013] Furthermore, in S5, the activation time ranges from 2 hours to 6 hours, and the water vapor partial pressure ranges from 0.1 MPa to 0.5 MPa.

[0014] The second objective of this invention is to provide a system for the co-preparation of adsorbent materials from coking solid waste, for implementing the above-mentioned method for the co-preparation of adsorbent materials from coking solid waste. The system includes: a raw material pretreatment unit, a forced mixer, a molding machine, a rotary kiln, a steam activation furnace, and a screening device; the rotary kiln is equipped with an atmosphere control system to maintain a low-oxygen environment inside the kiln.

[0015] The advantages and technical effects of this invention are: This invention enables the synergistic treatment of multi-source solid waste, including tar residue, coking biochemical sludge, waste activated carbon, and waste desulfurizing agent, reducing the amount of waste that needs to be transported for disposal and achieving high-value utilization. This invention enables in-situ sulfur fixation and mineralization of waste desulfurizing agent during carbonization, reducing the risk of sulfur-containing component migration and secondary pollution, and improving process stability; This invention enables the formation of a composite carbon skeleton from waste activated carbon and carbonization products, and achieves controllable construction of the pore structure through steam activation; The adsorption material obtained by this invention can be used for the adsorption and purification of sulfur-containing gases and VOCs, thus broadening the application scenarios of coking solid waste resource utilization products. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart of a preferred embodiment of the present invention is shown; Detailed Implementation To make the above-mentioned objectives, control system design, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0018] This invention prepares adsorbent materials with application value and controllable performance while achieving volume reduction and stabilization, especially adsorbent materials for the treatment of sulfur-containing gases and VOCs.

[0019] This invention achieves synergistic reduction of solid waste from multiple sources through low-oxygen segmented carbonization in a rotary kiln followed by activation, producing reusable adsorbent materials for the adsorption and purification of sulfur-containing gases and VOCs.

[0020] This invention discloses a method and system for preparing adsorbent materials using tar residue, biochemical sludge, spent activated carbon, and spent desulfurizing agent as raw materials. The tar residue, coking biochemical sludge, spent activated carbon, and spent desulfurizing agent are pretreated, then mixed and homogenized in a specific ratio and formed into a green body. The green body is fed into a rotary kiln for staged heating and carbonization under a low-oxygen atmosphere, and in-situ sulfur fixation and mineralization are achieved using the spent desulfurizing agent. Subsequently, the carbonized particles are steam-activated to obtain the adsorbent material. This adsorbent material is used for the adsorption and purification of sulfur-containing gases and VOCs. This invention achieves synergistic reduction and high-value utilization of multi-source solid waste.

[0021] Please see Figure 1 A method for co-preparing adsorbent materials from coking solid waste, comprising: S1. Raw material pretreatment: Dehydration and viscosity reduction treatment of tar residue; dehydration and crushing of coking biochemical sludge; drying, pulverizing and screening of waste activated carbon and waste desulfurizing agent; S2. Mixing and proportioning: The pretreated tar residue, coking biochemical sludge, waste activated carbon and waste desulfurizing agent are mixed and homogenized in a specific ratio to obtain a mixture; wherein, the waste desulfurizing agent is used as an in-situ sulfur-fixing agent and an inorganic framework regulator. S3. Molding: The mixture is pressed into pellets or extruded into a blank to obtain a green body; S4. Low-oxygen segmented carbonization: The billet is fed into a rotary kiln and carbonized in segments under a low-oxygen atmosphere with an oxygen content of ≤3% to obtain carbonized particles; during the carbonization process, the calcium-based mineral phase provided by the waste desulfurizing agent reacts with the sulfur-containing components released by the system to form a sulfate or sulfide stable phase, thereby achieving in-situ solid sulfur mineralization. S5. Steam activation: The carbonized particles are activated by passing steam through them at 800℃~1000℃ to construct a microporous structure and obtain the adsorbent material.

[0022] To better understand the technical solution of this invention, non-limiting examples are given below: The process flow of this invention includes: raw material pretreatment → metering, mixing and homogenization → molding → rotary kiln low-oxygen segmented carbonization → activation → sieving and grading → finished product. Unqualified products are reactivated or recycled in a closed-loop process.

[0023] The raw materials mainly include tar residue, coking biochemical sludge, waste activated carbon, and waste desulfurizing agent.

[0024] In a specific embodiment, the main steps include the following: S1. Raw material pretreatment: Dehydration of tar residue and viscosity reduction treatment using demulsifiers; Conditioning, dewatering, and crushing of coking biochemical sludge; Waste activated carbon is crushed and screened; The waste desulfurizing agent is dried, crushed, and sieved. S2, Preparation and Mixing: The pretreated tar residue, coking biochemical sludge, waste activated carbon and waste desulfurizing agent are measured in proportion and then mixed and homogenized to obtain a mixture.

[0025] S3, Molding: The mixture is granulated, extruded, or compressed into pellets to obtain granules or strip-shaped preforms.

[0026] S4, Low-oxygen segmented carbonization: The billet is fed into a rotary kiln and carbonized in stages under a low-oxygen or inert atmosphere to obtain carbonized particles. During the second temperature zone of carbonization and the heat preservation stage after carbonization, the mineral phase provided by the waste desulfurizing agent reacts with the sulfur-containing components of the system to form a sulfate or sulfide stable phase.

[0027] S5, Steam activation: The carbonized particles were activated by steam to obtain the adsorbent material.

[0028] S6. Classification and Reuse: The adsorbent material is screened and classified. Products that do not meet the specific surface area index are reactivated or returned to S2 for re-preparation.

[0029] In another specific embodiment, the main steps include: Raw material composition and collaborative division of labor The raw materials in this embodiment include: Tar residue: with a moisture content of 15% to 25%, serves as a preform for molding, bonding, and pore formation; Coking biochemical sludge: with a moisture content of 40% to 60%, it provides an inorganic ash framework and mineralization reaction sites to achieve simultaneous volume reduction; Waste activated carbon: derived from activated carbon used for desulfurization and activated carbon used for VOCs adsorption, which improves pore structure stability and adsorption function; Waste desulfurizing agent: It has a high sulfur content and provides a calcium-based mineral phase. It can achieve in-situ sulfur fixation and mineralization during low-oxygen carbonization, reduce the risk of sulfur-containing component migration and improve the stability of inorganic phase and particle strength of the product.

[0030] S1, Raw material pretreatment For tar residue: use centrifugation or pressure filtration to dehydrate it, so that the moisture content is 10% to 15%.

[0031] Demulsifiers are added to heated and stirred tar residue to break up the emulsion, reduce viscosity, promote stratification, and remove hard impurities.

[0032] Under stirring conditions, add demulsifier at 0.5–1 wt% of the wet basis weight of the tar residue. After addition, moderate mechanical stirring is required to ensure sufficient contact between the demulsifier and the emulsion. The stirring speed should not be too fast, maintaining a medium speed (200–500 rpm). Temperature significantly affects the demulsification effect; heating (50–80℃) can reduce the liquid viscosity and accelerate the separation process. Continue stirring for 10–30 minutes, then allow to stand for 30–120 minutes to separate the phases. Discard the separated aqueous phase to obtain the viscosity-reduced tar residue.

[0033] For coking biochemical sludge: adjust the dewatering to 20% to 30% and break it up so that there are no obvious large clumps.

[0034] For waste activated carbon: crush and screen it to control the particle size ≤5mm in order to improve the uniformity of mixing and reduce molding cracks and uneven pore structure.

[0035] For waste desulfurizing agent: dry, crush and screen to control the particle size ≤3mm, and remove lumps and hard impurities.

[0036] S2, Mixing ratio The pretreated tar residue, coking biochemical sludge, waste activated carbon and waste desulfurizing agent are mixed and homogenized in a certain proportion to obtain a mixture; the mixture is calculated by mass percentage and the sum of the four is 100%.

[0037] Optimal formulation, formulation range (wt%) Tar residue: 18%–25% Coking biochemical sludge: 40%–50% Waste activated carbon: 20%–30% Waste desulfurizing agent: 8%–15% Graded premixing (to prevent clumping and improve uniformity) First, put the waste activated carbon and waste desulfurizing agent into a dry mixer and dry mix for 3-5 minutes to obtain mineral-carbon powder premix. Add coking biochemical sludge and mix for 5-8 minutes; Finally, add the tar residue and mix for 10–20 minutes to form a homogeneous mixture. Continuous forced stirring is preferred for homogenization. The process ends when homogeneity is achieved.

[0038] Moisture / plasticity adjustment (for molding purposes) Adjust the plasticity of the mixture during the mixing process according to molding requirements. When the mixture is too dry and difficult to granulate / extrude, add water or reuse the recycled material. When the mixture is too wet and prone to sticking, extend the dry mixing time appropriately or add dry materials (waste activated carbon or dried sludge).

[0039] S3, Molding The mixture is granulated, extruded or briquetteed to obtain granules or strip-shaped preforms; preferably, the particle size is 5-10 mm.

[0040] After molding, the material is pre-dried at a low temperature (60-80℃) to reduce free water and minimize cracking and pulverization caused by instantaneous evaporation in the carbonization section.

[0041] S4, Rotary kiln low-oxygen segmented carbonization The billet is fed into a rotary kiln and carbonized in stages under low oxygen conditions to obtain carbonized particles.

[0042] Key control conditions include: The oxygen content in the rotary kiln is ≤3% (volume fraction). Carbonization temperature: 300–700℃; Carbonization residence time: 30–60 min; The segmented heating process consists of two temperature stages: the first stage is 300–500℃, and the second stage is 500–700℃.

[0043] The purpose of employing a two-temperature zone system is to first achieve safe and uniform removal of volatiles and structural shaping under low-oxygen conditions. This significantly reduces the risk of material sticking to the walls, agglomerating, and forming rings in the rotary kiln at high temperatures, thereby improving the stability of continuous operation. Then, deep carbonization is carried out to improve particle strength and pore structure controllability, and to provide a stable precursor for subsequent activation. Simultaneously, it works in conjunction with waste desulfurizing agents to achieve in-situ sulfur fixation and mineralization.

[0044] The biochemical sludge and tar residue have high and uneven water content. The 300–500℃ range allows for the gradual release of water and low-boiling-point components, preventing particle bursting, pulverization, and channel collapse caused by sudden and violent precipitation at high temperatures. In this temperature range, the tar residue softens, flows, and rearranges, acting as a "secondary binder / coating" agent on the particles, ensuring more uniform coating and fixation of the spent activated carbon and sludge ash, thus improving the structural integrity and abrasion resistance of the particle structure. The organic matter in the tar residue and sludge begins to decompose, producing volatiles that form initial channels and aeration networks within the particles, providing pathways for the continuous release of volatiles at higher temperatures and reducing internal pressure buildup.

[0045] In the 500–700℃ range, the tar residue and sludge organic matter further decompose and condense, forming a more stable carbon skeleton, making the particles less prone to collapse under subsequent high-temperature activation, and the pore structure more controllable. Inorganic phase reforming and skeleton enhancement: Sludge ash undergoes controlled reforming of sintering and consolidation in this temperature range, forming a supporting skeleton; the composite of waste activated carbon and newly formed carbon phase improves particle strength and wear resistance.

[0046] The main zone for in-situ sulfur fixation mineralization: This temperature range is also a key window for the participation of calcium-based waste desulfurizers in the reaction. Sulfur-containing gases such as H2S released during carbonization come into contact with the calcium-based mineral phase inside the particles, are captured, and transformed into sulfide and / or sulfate stable phases; at the same time, the inorganic matrix plays a role in encapsulating and fixing the stable phase.

[0047] After carbonization, the carbonized particles are cooled to ≤60℃ before activation to avoid the risk of spontaneous combustion.

[0048] During the second temperature stage (500–700℃) of carbonization and the heat preservation stage after carbonization, the mineral phase provided by the waste desulfurizing agent reacts with the sulfur-containing components of the system to form a stable phase of sulfate or sulfide, thereby achieving in-situ sulfur fixation and mineralization, which reduces the risk of sulfur-containing component migration and improves product stability.

[0049] S5, Activation Carbonized particles lack the adsorption capacity expected of activated carbon because their pore structure is not yet fully developed. Activation, on the other hand, occurs after carbonization, through reaction with an activating agent (water vapor), further developing and expanding the pores of the carbonized material, thereby obtaining activated carbon products with a well-developed pore structure and a certain strength requirement.

[0050] Steam activation can make carbon materials extremely porous and have a very large surface area. The activation process uses steam as an activating agent, which acts to create and open pores and remove impurities from the pores of activated carbon, thereby increasing porosity.

[0051] Porous carbon materials are prepared by steam activation of carbonized particles. Steam activation selectively etches the carbon surface, forming a microporous structure. Adsorbent materials with controllable pore structures are then obtained by cooling to room temperature after activation.

[0052] Steam activation: temperature 800~1000℃, activation time 2-6 hours, water vapor partial pressure 0.1-0.5MPa.

[0053] The activation process for carbonized particles typically includes the following steps: Material preparation: Screen the carbonized material to remove unqualified particles and ensure that the carbonized material entering the activation furnace has a uniform particle size.

[0054] Activator preparation: Prepare the appropriate activator depending on the activation method. For example, physical activation methods typically use water vapor, carbon dioxide, or air as activators.

[0055] Preheating the activation furnace: Heat the activation furnace to the predetermined activation temperature, which is 800-1000℃.

[0056] Carbonized material is fed into the activation furnace: The screened carbonized material is fed into the activation furnace.

[0057] Activation reaction: At high temperature, the activator reacts with carbon atoms in the carbonized material, first opening the closed pores formed during carbonization, then expanding the original pores, and finally forming new pores.

[0058] Controlling activation conditions: Based on the required properties of activated carbon, control factors such as the temperature of the activator and the activation time.

[0059] Activation complete: When the carbonized material reaches the required pore structure and specific surface area, the supply of activator is stopped, and the activation reaction ends.

[0060] Cooling: Remove the activated material from the activation furnace and cool it to prevent excessive oxidation.

[0061] Screening: The cooled activated material is screened to remove particles that do not meet the requirements. The undersize material can be recycled.

[0062] Because the activated particles have undergone an activation process, they have a porous structure and can effectively adsorb harmful substances, thus possessing the adsorption properties of activated carbon.

[0063] Carbonization and activation are two irreversible steps that cannot be reversed in sequence. Only by going through these two steps can activated carbon products with practical application value be obtained.

[0064] S6. Classification and Reuse Closed Loop The adsorbent material is screened and graded, with specific surface area as the key indicator: the specific surface area of ​​the finished product is ≥600m² / g.

[0065] Those that do not meet the specific surface area index will undergo reactivation treatment (reactivation for 30-60 min); those that do not meet the requirements for particle size or strength will be crushed and returned to S2 for remixing and molding.

[0066] A system for co-preparing adsorbent materials from coking solid waste, used to implement the above-mentioned method for co-preparing adsorbent materials from coking solid waste, the system includes: a raw material pretreatment unit, a forced mixer, a molding machine, a rotary kiln, a steam activation furnace, and a screening device; the rotary kiln is equipped with an atmosphere control system to maintain a low-oxygen environment inside the kiln.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for co-preparing adsorbent materials from coking solid waste, characterized in that, include: S1. Raw material pretreatment: Dehydration and viscosity reduction treatment of tar residue; Dewatering and crushing coking biochemical sludge; Waste activated carbon and waste desulfurizing agent are dried, pulverized, and sieved. S2. Mixing and proportioning: The pretreated tar residue, coking biochemical sludge, waste activated carbon and waste desulfurizing agent are mixed and homogenized in a specific ratio to obtain a mixture; wherein, the waste desulfurizing agent is used as an in-situ sulfur-fixing agent and an inorganic framework regulator. S3. Molding: The mixture is pressed into pellets or extruded into a blank to obtain a green body; S4. Low-oxygen segmented carbonization: The billet is fed into a rotary kiln and carbonized in segments under a low-oxygen atmosphere with an oxygen content of ≤3% to obtain carbonized particles; during the carbonization process, the calcium-based mineral phase provided by the waste desulfurizing agent reacts with the sulfur-containing components released by the system to form a sulfate or sulfide stable phase, thereby achieving in-situ solid sulfur mineralization. S5. Steam activation: The carbonized particles are activated by passing steam through them at 800℃~1000℃ to construct a microporous structure and obtain the adsorbent material.

2. The method for co-preparing adsorbent materials from coking solid waste according to claim 1, characterized in that, S1 includes: The tar residue is dehydrated by centrifugation or pressure filtration to bring the moisture content to 10%–15%. The coking biochemical sludge is dewatered to 20%–30% and then crushed; Waste activated carbon is crushed and screened to control the particle size to ≤5mm; Waste desulfurizing agent is dried, crushed and screened to control the particle size ≤3mm, and lumps and hard impurities are removed.

3. The method for co-preparing adsorbent materials from coking solid waste according to claim 1 or 2, characterized in that, The dehydration and viscosity reduction treatment of tar residue includes: adding a demulsifier to heated and stirred tar residue to demulsify, reduce viscosity, promote stratification, and remove hard impurities; Under stirring conditions, add demulsifier at 0.5wt% to 1wt% of the wet basis weight of tar residue. After addition, mechanical stirring is required to ensure that the demulsifier is in full contact with the emulsion. The stirring speed is 200 rpm to 500 rpm. At the same time, the viscosity of the liquid is reduced by heating to 50℃ to 80℃. After stirring for 10 min to 30 min, let it stand for 30 min to 120 min to separate the phases. The separated aqueous phase is then discharged to obtain the tar residue after viscosity reduction.

4. The method for co-preparing adsorbent materials from coking solid waste according to claim 1, characterized in that, In S2, by mass percentage: tar residue 18%–25%; coking biochemical sludge 40%–50%; waste activated carbon 20%–30%; waste desulfurizing agent 8%–15%.

5. The method for co-preparing adsorbent materials from coking solid waste according to claim 4, characterized in that: First, graded premixing is carried out: waste activated carbon and waste desulfurizing agent are put into a dry mixer and dry mixed for 3 to 5 minutes to obtain mineral-carbon powder premix; then coking biochemical sludge is added and mixed for 5 to 8 minutes; finally, tar residue is added and mixed for 10 to 20 minutes to form a uniform mixture. Then adjust the water content / plasticity: adjust the plasticity of the mixture according to the molding requirements during the mixing process; when the mixture is too dry and difficult to granulate / extrude, add water or reuse the recycled material; when the mixture is too wet and easy to stick, appropriately extend the dry mixing time or add dry material.

6. The method for co-preparing adsorbent materials from coking solid waste according to claim 1, characterized in that, S3 include: The mixture is granulated, extruded, or briquetteed to obtain granules or strip-shaped preforms; the particle size is 5mm to 10mm. After molding, it undergoes low-temperature pre-drying.

7. The method for co-preparing adsorbent materials from coking solid waste according to claim 6, characterized in that, The temperature range for the low-temperature pre-drying is 60℃~80℃.

8. The method for co-preparing adsorbent materials from coking solid waste according to claim 1, characterized in that, S4 includes: The billet is fed into the rotary kiln, and the key control conditions include: oxygen content in the rotary kiln ≤3%; carbonization temperature 300℃~700℃; carbonization residence time 30min~60min; The segmented heating process consists of two temperature stages: the first stage is 300℃~500℃, and the second stage is 500℃~700℃.

9. The method for co-preparing adsorbent materials from coking solid waste according to claim 1, characterized in that, In S5, the activation time ranges from 2 hours to 6 hours, and the water vapor partial pressure ranges from 0.1 MPa to 0.5 MPa.

10. A system for co-preparing adsorbent materials from coking solid waste, characterized in that: The system for implementing the method for co-preparing adsorbent materials from coking solid waste according to any one of claims 1-9 includes: a raw material pretreatment unit, a forced mixer, a molding machine, a rotary kiln, a steam activation furnace, and a screening device; the rotary kiln is equipped with an atmosphere control system for maintaining a low-oxygen environment inside the kiln.

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