A coal gasification residue circulation system, method, electronic device and storage medium

Abstract

The present application provides a kind of coal gasification residue circulating system, method, electronic equipment and storage medium, specific scheme is as follows: S1, the primary coal gasification residue of gasification furnace is sent into vibrating screen device and is two-stage screened, with 2mm screen hole as boundary to obtain coarse residue and fine residue, coarse residue is entered first temporary storage bin after impurity removal and air drying, fine residue is entered second temporary storage bin after air drying;S2, coarse residue is sent into dry separator by conveying belt, image acquisition component carries out X-ray penetration imaging or surface image acquisition on the material on conveying belt, compared with prior art, the advantages of the present application include: hierarchical precision utilization, adapt to raw material characteristics: the present application is classified and disposed according to the particle size, residual carbon, mineral composition, physical structure difference of gasification coarse residue and fine residue, make the best use of advantages, give full play to the performance advantages of two kinds of residue, different from traditional mixed residue extensive utilization mode.

Description

Technical Field

[0001] This invention relates to the field of coal-based industrial solid waste resource utilization technology, specifically to a coal gasification residue recycling system, method, electronic equipment, and storage medium. Background Technology

[0002] Currently, the comprehensive utilization rate of coal gasification slag is less than 10%, and the mainstream disposal methods are open-air storage and simple landfill. This not only occupies a large amount of land resources, but also causes soluble harmful substances in the slag to seep in with rainwater, polluting the surrounding soil and groundwater.

[0003] Coal gasification slag is classified into coarse slag and fine slag according to particle size and morphology: coarse slag is irregularly shaped lumps of 2-30mm, with a dense structure and high mechanical strength, mainly composed of silicon dioxide and aluminum oxide, with a residual carbon content of 5%-30%; fine slag has a particle size of less than 2mm, is in powder or flocculent form, with a residual carbon content of 30%-50%, possesses adsorption and combustibility, and also contains water-soluble salts and various trace elements required by plants. Existing technologies mostly utilize gasification slag as a single category, without considering the physicochemical, mineral, and chemical properties of coarse and fine slag for graded and classified treatment; furthermore, the lack of online identification and automatic separation methods for incompletely gasified raw coal mixed in with the gasification slag leads to excessive carbon content in backfill materials, fluctuations in the strength of building materials, and the inability to fully dispose of solid waste. Summary of the Invention

[0004] This invention provides a coal gasification residue recycling system, method, electronic equipment, and storage medium to solve the problems of low utilization rate and secondary pollution caused by the lack of classification of coarse and fine slag, inability to identify and separate mixed coal in the slag online, and lack of recycling paths for tail materials from each process in existing coal gasification slag disposal methods. The specific solution is as follows: S1. The raw coal gasification slag discharged from the gasifier is sent to a vibrating screen for two-stage screening. Coarse slag and fine slag are obtained with 2mm screen holes as the dividing line. After the coarse slag is cleaned and air-dried, it is sent to the first temporary storage bin. After the fine slag is air-dried, it is sent to the second temporary storage bin. S2. The coarse slag is fed into the dry separator via a conveyor belt. The image acquisition component performs X-ray penetration imaging or surface image acquisition on the material on the conveyor belt. The recognition and processing component compares the acquired image with the pre-stored imaging feature thresholds of coal and coarse slag and outputs the position signal of the coal particles. The injection control component drives the high-pressure airflow injection device to blow the coal particles away from the material flow based on the position signal and the belt speed of the conveyor belt. In the separated coarse slag, the first part is used as backfill material in the mine or roadbed filling material. The second part is ball-milled to a particle size of 0.074-0.5mm and then mixed with inorganic cementitious materials and mortar functional additives to make building mortar or low-carbon cementitious materials. S3. The fine slag is sequentially passed through a spiral chute and a shaking table for gravity separation. The carbon-rich strip material formed on the shaking table surface is imaged and identified. The strip material identified as coal is separated by a zoned airflow interception mechanism. The first part of the separated fine slag is roasted at 800℃ for 1-2 hours, cooled and crushed, and then mixed with additives to make soil conditioner, silicon fertilizer raw material or horticultural planting sand. The second part is molded and solidified to make wastewater adsorbent or adsorption catalyst material. S4. Collect the tailings generated in steps S2 and S3, screen them a second time to below 0.5mm, and remix them into the building material preparation process of S2 at a ratio not exceeding 10% of the total mass of building material raw materials.

[0005] Preferably, the coarse slag in S1 has a particle size of 2-30 mm and a moisture content of no more than 10.38% after air drying; the fine slag has a particle size of less than 2 mm and a moisture content of no more than 19.18% after air drying; the upper screen of the two-stage screening has a sieve aperture of 30 mm and the lower screen has a sieve aperture of 2 mm, and impurities larger than 30 mm are manually removed and discharged.

[0006] Preferably, the identification processing component in S2 receives the image output by the image acquisition component in a frame-synchronized manner, makes a determination based on the grayscale difference between coal and coarse slag in the X-ray penetration image or the difference in texture and reflectivity in the surface image, and sends the coordinates of the particles determined to be coal in the width direction of the conveyor belt and the delay time to reach the injection section to the injection control component. The injection control component opens the solenoid valve of the corresponding nozzle according to the coordinates, and the delay time is obtained by dividing the distance between the image acquisition section and the injection section by the conveyor belt speed.

[0007] Preferably, the building mortar in S2 includes, by weight, 40-60 parts of ground coarse slag, 20-35 parts of inorganic binder, and 5-15 parts of mortar functional additives; when preparing underfloor heating backfill mortar, the amount of ground coarse slag is 50%-60%, and when preparing tile adhesive, the amount of ground coarse slag is 40%-50%.

[0008] Preferably, the loss on ignition of the fine slag after roasting in S3 is 11.33%-13.00%, and water-soluble salts in the fine slag are removed simultaneously during the roasting process.

[0009] Preferably, the raw coal gasification slag includes gasification slag discharged from a Texaco furnace, a GSP furnace, a multi-nozzle coal-water slurry gasifier, or a Shell pulverized coal gasifier.

[0010] A coal gasification residue recycling system, characterized in that it comprises: The grading and sorting unit includes a two-stage vibrating screen mechanism, a cleaning mechanism, a drying area, and a first temporary storage bin and a second temporary storage bin. The raw coal gasification slag is separated into coarse slag and fine slag by a 2mm screen hole and temporarily stored in separate bins. The coarse slag processing unit includes a dry separator, a high-pressure air jetting device, a ball mill, and a forced mixer. An image acquisition component is installed above the conveyor belt of the dry separator, and a nozzle array arranged along the width direction is installed at the end of the conveyor belt. The fine slag processing unit includes a spiral chute, a shaking table, a zoned airflow interception mechanism, a high-temperature roasting furnace, a pulverizer, and a molding and solidification device. An image acquisition component facing the carbon-rich strip area is provided above the shaking table surface. The identification and sorting control unit includes an identification processing component and a jet control component. The input end of the identification processing component is connected to each image acquisition component, and the output end is connected to the solenoid valve of the nozzle array and the partitioned airflow interception mechanism via the jet control component. The tailings recovery unit includes a tailings collection and conveying mechanism and a secondary screening mechanism with a 0.5mm aperture, and its outlet is connected to the batching and metering bin of the forced mixer. Preferably, the identification and sorting control unit further includes a belt speed detection encoder, which is installed on the driven roller of the conveyor belt of the dry sorting machine and connected to the identification processing component. The identification processing component corrects the blowing delay time based on the real-time pulse signal of the belt speed detection encoder. The response time of the solenoid valve of the nozzle array is no more than 5ms, and the distance between adjacent nozzles is 10-20mm.

[0011] An electronic device is characterized by comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, it implements the control steps performed by the identification and sorting control unit in any of the above-described methods, as well as the start-stop interlocking control steps of the material conveying equipment between each process.

[0012] A computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements various control steps performed by the electronic device.

[0013] Compared with the prior art, the advantages of the present invention include: 1. Precise utilization based on grade and suitability to raw material characteristics: This invention classifies and treats gasification coarse slag and fine slag according to differences in particle size, residual carbon, mineral composition and physical structure, giving full play to the advantages of each type of slag and avoiding its disadvantages, which is different from the traditional extensive utilization mode of mixed slag.

[0014] 2. Complete utilization path and tiered value enhancement: Construct a full-tiered utilization system from low-value backfilling to medium-value building materials to high-value agricultural / industrial materials, taking into account both bulk consumption and high-value-added development, and adapting to the needs of enterprises with different production scales.

[0015] 3. Significant environmental benefits and no secondary pollution: It completely solves the problems of land occupation, soil and groundwater pollution caused by open storage and landfill of coal gasification slag; the entire process tail material is recycled in a closed loop, achieving zero discharge of solid waste.

[0016] 4. Simple process and wide applicability: The overall process mainly consists of screening, grinding, roasting and mixing. The equipment is mature and the operating cost is low. It can be directly integrated into existing coal chemical production lines and is suitable for coal gasification slag produced in various production areas and different furnace types across the country. It has strong promotion potential.

[0017] 5. Strong industrial synergy: It connects multiple industrial chains including coal chemical, building materials, agriculture, and environmental protection, transforming coal chemical solid waste into building materials, agricultural products, and environmental protection consumables, thereby promoting the green and low-carbon transformation and upgrading of the coal chemical industry. Attached Figure Description

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall method steps involved in the present invention; Figure 2 This is a schematic diagram of the overall system structure involved in the present invention; Figure 3 This is a schematic diagram of the XRD analysis results of the raw coal and coal gasification slag involved in the present invention; Figure 4 Comparison of the microstructures of the coarse and fine gasification slags involved in this invention; Figure 5 This is a schematic diagram of the carbon-ash combination morphology of the gasification fine slag involved in this invention. Detailed Implementation

[0020] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] like Figure 1 As shown, the residue recycling system includes a grading and sorting unit, a coarse residue treatment unit, a fine residue treatment unit, an identification and sorting control unit, and a tailings recycling unit.

[0023] The grading and sorting unit includes a double-layer vibrating screen with an upper screen mesh size of 30mm and a lower screen mesh size of 2mm. The vibration frequency is 16Hz and the double amplitude is 8mm. After stones and metals are manually removed from the upper screen, the material on the upper screen is discharged. The material in the middle of the screen (2~30mm) is coarse slag, and the material under the screen (<2mm) is fine slag. The coarse and fine slags are spread on the drying site, with a spreading thickness of no more than 150mm. After drying until the moisture content of the coarse slag is no higher than 10.38% and the moisture content of the fine slag is no higher than 19.18%, they are sent to the first temporary storage bin and the second temporary storage bin respectively by a bucket elevator.

[0024] The coarse slag processing unit includes a dry separator, a ball mill, and a forced mixer. The dry separator has a conveyor belt with a width of 800mm and a belt speed of 2.0m / s. An image acquisition assembly consisting of an X-ray source (tube voltage 160kV, tube current 5mA) and a linear array detector is installed above the conveyor belt, or a high-resolution camera with a resolution of 4096×3000 pixels and a frame rate of 60fps and a bar light source are installed. A 64-channel nozzle array is set below the end of the conveyor belt along the width direction, with a nozzle spacing of 12mm, a blowing air pressure of 0.6MPa, and a solenoid valve response time of 3ms. A 1024-line incremental encoder is installed on the driven roller of the conveyor belt.

[0025] The fine slag processing unit includes a spiral chute (1mm diameter, 900mm pitch, five spiral turns), a shaking table (4mm×1850mm bed size, 16mm stroke, 280 strokes / min), a zoned airflow interception mechanism, a high-temperature roasting furnace (roller type, maximum furnace temperature 0℃), a hammer mill and a double-roll forming machine, and a curing chamber. An image acquisition component is installed above the concentrate belt outlet on the shaking table bed surface. The outlet section is divided into 8 interception zones along the transverse direction, with each zone corresponding to an airflow interception valve.

[0026] The identification and sorting control unit includes an identification processing component and a jetting control component. The identification processing component receives frame-synchronized images from each image acquisition component; for X-ray penetration images, it performs threshold comparison based on the grayscale range formed by the difference in X-ray attenuation between coal and slag, identifying connected regions whose grayscale values ​​fall within the coal characteristic range as coal particles; for surface images, it compares and determines particles based on surface texture and reflectivity characteristic ranges. The identification processing component outputs the coordinates of the coal particles in the bandwidth direction and the delay time. The delay time is equal to the distance from the imaging section to the jetting section (600mm in this system) divided by the real-time belt speed converted by the encoder. The jetting control component opens the corresponding solenoid valve according to the coordinates. The valve opening time is calculated based on the projected length of the particle along the belt speed direction, with a single particle valve opening time of 10~30ms.

[0027] The tailings recovery unit includes a scraper collection conveyor and a circular vibrating screen with a 0.5mm aperture. The undersize material is sent to the batching and metering bin of the forced mixer via a screw conveyor.

[0028] Example 1: Recycling Treatment of Slag from Coal-Water Slurry Gasification in Xinjiang (1) Grading and sorting. 120 t / d of raw gasification slag from a coal-water slurry gasification unit in Xinjiang was collected and screened by a grading and sorting unit. The coarse slag had a concentrated particle size of 2~4.75 mm and a measured moisture content of 9.85% after air drying. The fine slag had a particle size of less than 2 mm, with <0.075 mm particles accounting for 82% of the total. The measured moisture content of the fine slag after air drying was 18.72%. The coarse and fine slags were temporarily stored in separate bins.

[0029] (2) Coarse slag treatment. Coarse slag is fed into the dry separator at a rate of 20 t / h. The X-ray source operates at 160 kV / 5mA, and the linear array detector operates at a frequency of 10 kHz. The identification and processing component identifies connected regions with gray values ​​higher than the pre-stored coal characteristic lower limit threshold as coal particles (coal density is lower than slag, radiation attenuation is small, and imaging gray value is high). In a single shift, the measured proportion of mixed coal was 4.2% of the feed mass. The injection control component drives the corresponding nozzles to blow coal into the coal collection trough, and the recovered coal is returned to the gasifier for coal blending. The measured coal content of the separated coarse slag is 0.7%.

[0030] 60% of the separated coarse slag was transported to surrounding mines as underground backfill material, achieving a backfill compaction degree of 96% as designed. The remaining 40% was ground in a ball mill for 40 minutes to a particle size of 0.2-0.5 mm. Then, 50 parts by weight of the ground coarse slag, 28 parts of fly ash, 12 parts of mortar functional additives, and 10 parts of modifier were mixed in a forced mixer for 180 seconds to produce underfloor heating backfill mortar and masonry mortar. Testing showed that the underfloor heating backfill mortar had a 28-day compressive strength of 4.8 MPa and a thermal conductivity of 0.31 W / (m·K); the masonry mortar had a 28-day compressive strength of 12.6 MPa, reaching the M10 grade.

[0031] (3) Fine slag treatment. After the fine slag is slurried (mass concentration 25%), it is pumped into the top of the spiral chute to complete the first gravity separation. The middlings and concentrate enter the shaking table for the second gravity separation. The carbon-rich black strips formed on the shaking table are imaged by the image acquisition component. The identification and processing component determines the interception area where the gray value of the strip area is lower than the characteristic threshold of the slag strip as the coal-rich area. The corresponding interception valve of the zoned airflow interception mechanism is opened to introduce the coal-rich strip material into the carbon-rich tank. The residual carbon content of the carbon-rich material is measured to be 46%, which is used as fuel for boiler co-firing. The slag strip material is dewatered to separate fine slag.

[0032] 70% of the separated fine residue was fed into a high-temperature roasting furnace, heated to 800℃ at a rate of 10℃ / min, and roasted at a constant temperature for 2 hours. After cooling in the furnace, it was pulverized to <0.15mm using a hammer mill. The measured loss on ignition was 12.1%, and the removal rate of water-soluble salts was 87%. The 80 parts of roasted fine residue, 15 parts of humic acid organic conditioner, and 5 parts of binder were mixed and granulated to produce soil conditioner and silicon fertilizer raw materials. When applied to local saline-alkali experimental fields, the soil bulk density decreased from 1.52g / cm³ to 1.38g / cm³, and the crop emergence rate increased from 71% to 89%.

[0033] 30% of the separated fine slag was not calcined and was mixed with 85 parts fine slag, 12 parts bentonite binder, and 3 parts pore-forming agent. The mixture was then rolled into 4mm diameter particles and cured at 105℃ for 4 hours to produce a wastewater adsorbent. This adsorbent was used for the treatment of gasification wastewater in the plant, achieving a COD removal rate of 76% and an ammonia nitrogen removal rate of 68%.

[0034] (4) Closed-loop tailings. The tailings from grinding, crushing and molding processes total 3.1t / d. After being screened to below 0.5mm by the tailings recycling unit, they are recycled at 8% of the total mass of mortar raw materials and the amount of coarse grinding residue is reduced by an equal amount. The mortar strength grade remains unchanged, and there is no solid waste discharge from the entire plant.

[0035] Example 2: Comprehensive Utilization of Gasification Slag from Ningxia Coal Mining Group's Texaco Furnace The raw gasification slag is screened by a grading and sorting unit. The coarse slag is concentrated in the 2~4.75mm particle size range, and the fine slag has a particle size of less than 0.075mm. The coarse slag is then separated from the mixed coal by a dry separator (using a high-resolution camera scheme, based on the low reflectivity characteristics of the coal surface, the mixed coal detection rate is 97.5%). 50% is used for roadbed filling, and the roadbed resilient modulus meets the design value of secondary highways; 50% is ground to 0.074~0.3mm and compounded with slag powder, gypsum, and activator to make a low-carbon cementitious material, which replaces silicate cement at a ratio of 30% in the preparation of C30 concrete, with a 28-day compressive strength of 33.5MPa. The fine slag is decoaled by spiral chute-shaking table-strip identification. 60% is calcined at 800℃ for 1.5h (loss on ignition 11.8%) to make horticultural planting sand; 40% is molded and solidified to make an adsorption catalytic carrier with a specific surface area of ​​185m² / g, which is used in the field of chemical catalysis. After all the tailings are screened, they are recycled back to the low-carbon cementitious material production line, with the dosage controlled within 9%.

[0036] Example 3: Implementation of Industrialized Treatment and Electronic Equipment for Multi-Furnace Mixed Gasification Slag For coal chemical industrial parks with mixed slag discharge from Texaco furnaces, GSP furnaces, and multi-nozzle coal-water slurry gasification furnaces, three parallel grading and sorting lines are set up, sharing a single identification, sorting, and control unit and electronic equipment. Coarse slag is preferentially allocated to roadbeds and mine backfilling based on the bulk disposal volume, with the remainder used to prepare plastering mortar (45 parts ground coarse slag, 25 parts cement, and 8 parts additives) and thermal insulation mortar (42 parts ground coarse slag, 22 parts cement, 20 parts vitrified microspheres, and 8 parts additives). Fine slag is uniformly roasted and then allocated to agriculture and industry in a 1:1 ratio. All tailings are recycled, with an annual disposal capacity reaching tens of millions of tons.

[0037] like Figure 5As shown, the electronic equipment includes a processor, memory, communication interface, and bus. The processor is an industrial-grade multi-core processor. The memory includes a non-volatile storage area for computer programs and a buffer area for image frame data. The communication interface is connected to various image acquisition components, encoders, solenoid valve drive boards, and actuators of conveying, ball milling, and roasting equipment via industrial Ethernet. When the processor executes the computer program in the memory, it performs the following: receiving frame synchronization images and comparing them with pre-stored feature thresholds; outputting coal particle coordinates and delay times; driving the solenoid valves to open and close according to the coordinates and delays; and executing start-stop interlocks for screening, conveying, mixing, and roasting equipment based on the material level signals of each temporary storage bin—stopping the dry separator feed conveyor belt when the material level in the first temporary storage bin is below the lower limit, and shutting down the remixing screw conveyor when the cumulative amount in the tail material metering bin reaches 10% of the upper limit of the proportion.

[0038] The computer program is stored in a computer-readable storage medium, which may be any medium storing program code, such as a USB flash drive, portable hard drive, read-only memory, random access memory, magnetic disk, or optical disk. When the program is executed by a processor, it implements the control steps described above. The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for recycling residue after coal gasification, characterized in that, Includes the following steps: S1. The raw coal gasification slag discharged from the gasifier is sent to a vibrating screen for two-stage screening. Coarse slag and fine slag are obtained with 2mm screen holes as the dividing line. After the coarse slag is cleaned and air-dried, it is sent to the first temporary storage bin. After the fine slag is air-dried, it is sent to the second temporary storage bin. S2. The coarse slag is fed into the dry separator via a conveyor belt. The image acquisition component performs X-ray penetration imaging or surface image acquisition on the material on the conveyor belt. The recognition and processing component compares the acquired image with the pre-stored imaging feature thresholds of coal and coarse slag and outputs the position signal of the coal particles. The injection control component drives the high-pressure airflow injection device to blow the coal particles away from the material flow based on the position signal and the belt speed of the conveyor belt. In the separated coarse slag, the first part is used as backfill material in the mine or roadbed filling material. The second part is ball-milled to a particle size of 0.074-0.5mm and then mixed with inorganic cementitious materials and mortar functional additives to make building mortar or low-carbon cementitious materials. S3. The fine slag is sequentially passed through a spiral chute and a shaking table for gravity separation. The carbon-rich strip material formed on the shaking table surface is imaged and identified. The strip material identified as coal is separated by a zoned airflow interception mechanism. The first part of the separated fine slag is roasted at 800℃ for 1-2 hours, cooled and crushed, and then mixed with additives to make soil conditioner, silicon fertilizer raw material or horticultural planting sand. The second part is molded and solidified to make wastewater adsorbent or adsorption catalyst material. S4. Collect the tailings generated in steps S2 and S3, screen them a second time to below 0.5mm, and remix them into the building material preparation process of S2 at a ratio not exceeding 10% of the total mass of building material raw materials.

2. The method for recycling coal gasification residue according to claim 1, characterized in that, The coarse slag in S1 has a particle size of 2-30mm and a moisture content of no more than 10.38% after air drying; the fine slag has a particle size of less than 2mm and a moisture content of no more than 19.18% after air drying; the upper screen of the two-stage screening has a sieve aperture of 30mm and the lower screen has a sieve aperture of 2mm, and impurities larger than 30mm are manually removed and discharged.

3. The method for recycling coal gasification residue according to claim 1, characterized in that, The identification and processing component in S2 receives the image output by the image acquisition component in a frame-synchronized manner, and makes a judgment based on the grayscale difference between coal and coarse slag in the X-ray penetration image or the difference in texture and reflectivity in the surface image. The component then sends the coordinates of the particles identified as coal in the width direction of the conveyor belt and the delay time at which they reach the injection section to the injection control component. The injection control component opens the solenoid valve of the corresponding nozzle according to the coordinates. The delay time is obtained by dividing the distance between the image acquisition section and the injection section by the conveyor belt speed.

4. The method for recycling coal gasification residue according to claim 1, characterized in that, The building mortar in S2 includes, by weight, 40-60 parts of ground coarse slag, 20-35 parts of inorganic binder, and 5-15 parts of mortar functional additives; when preparing underfloor heating backfill mortar, the amount of ground coarse slag is 50%-60%, and when preparing tile adhesive, the amount of ground coarse slag is 40%-50%.

5. The method for recycling residue after coal gasification according to claim 1, characterized in that, The loss on ignition of the fine slag after roasting in S3 is 11.33%-13.00%, and the water-soluble salts in the fine slag are removed simultaneously during the roasting process.

6. The method for recycling residue after coal gasification according to claim 1, characterized in that, The raw coal gasification slag includes the gasification slag discharged from Texaco furnaces, GSP furnaces, multi-nozzle coal-water slurry gasifiers, and Shell pulverized coal gasifiers.

7. A residue recycling system after coal gasification, characterized in that, include: The grading and sorting unit includes a two-stage vibrating screen mechanism, a cleaning mechanism, a drying area, and a first temporary storage bin and a second temporary storage bin. The raw coal gasification slag is separated into coarse slag and fine slag by a 2mm screen hole and temporarily stored in separate bins. The coarse slag processing unit includes a dry separator, a high-pressure air jetting device, a ball mill, and a forced mixer. An image acquisition component is installed above the conveyor belt of the dry separator, and a nozzle array arranged along the width direction is installed at the end of the conveyor belt. The fine slag processing unit includes a spiral chute, a shaking table, a zoned airflow interception mechanism, a high-temperature roasting furnace, a pulverizer, and a molding and solidification device. An image acquisition component facing the carbon-rich strip area is provided above the shaking table surface. The identification and sorting control unit includes an identification processing component and a jet control component. The input end of the identification processing component is connected to each image acquisition component, and the output end is connected to the solenoid valve of the nozzle array and the partitioned airflow interception mechanism via the jet control component. The tailings recovery unit includes a tailings collection and conveying mechanism and a secondary screening mechanism with a 0.5mm aperture, and its outlet is connected to the batching and metering bin of the forced mixer.

8. A coal gasification residue recycling system according to claim 7, characterized in that, The identification and sorting control unit also includes a belt speed detection encoder, which is installed on the driven roller of the conveyor belt of the dry sorting machine and connected to the identification processing component. The identification processing component corrects the blowing delay time based on the real-time pulse signal of the belt speed detection encoder. The response time of the solenoid valve of the nozzle array is no more than 5ms, and the distance between adjacent nozzles is 10-20mm.

9. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the control steps performed by the identification and sorting control unit in the method of any one of claims 1 to 6, as well as the start-stop interlocking control steps of the material conveying equipment between each process.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control steps performed by the electronic device of claim 9.

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