Resource recovery method and system for synchronously purifying tar and dust in biomass gasification tail gas

Abstract

The invention provides a resource recovery method and system for synchronously purifying tar and dust in biomass gasification tail gas, and the method comprises the steps: collecting key parameters of gasification furnace outlet tail gas in real time through a multi-sensor array, and analyzing the key parameters through a central intelligent processing unit to generate an optimized operation instruction; the high-temperature tail gas enters a catalytic cracking reactor, heavy tar is converted into combustible gas under the synergistic effect of a catalyst and an optimization instruction, and primary purification is completed; the treated gas enters an integrated high-voltage electrostatic purifier, residual light tar fog drops and fine dust are cooperatively captured through an accurately controlled electrostatic field, clean synthesis gas and a concentrated mixture are synchronously produced, the concentrate is mechanically separated through a spiral extrusion separation device, and liquid tar and solid carbon-containing dust are obtained; the solid dust and part of liquid tar are mixed in proportion, and the mixture is molded into the composite fuel rod with a regular form through an intelligent granulator. According to the invention, full-flow purification of pollutants and collaborative preparation of recycling products are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of computer, and in particular to a resource recovery method and system for synchronous purification of tar and dust in biomass gasification tail gas. BACKGROUND

[0002] Biomass gasification technology, as an effective way to convert low-grade biomass energy into high-grade combustible gas, plays an important role in the field of renewable energy utilization. However, the large-scale industrial application of this technology has long been restricted by the problems of tar and dust in the gasification tail gas. The composition of tar is complex and its content fluctuates greatly, and it easily condenses into viscous substances under low temperature conditions, which not only blocks the downstream pipeline and equipment, but also causes serious corrosion problems. Dust particles can cause abnormal wear of key equipment components, and together with tar, they can also poison the catalyst in the subsequent synthesis gas utilization process, seriously affecting the long-term stable operation of the entire system.

[0003] The current industry generally adopts a step-by-step independent purification treatment strategy, usually first removing dust by mechanical devices such as cyclone separators, and then removing fine dust and tar components by water washing, electrostatic capture or filtration devices. This traditional method has many inherent defects: physical separation methods, especially water washing processes, produce a large amount of high-concentration tar-containing organic wastewater, not only causing serious secondary pollution problems, but also requiring high water treatment costs. At the same time, this treatment method completely wastes the chemical energy value contained in the tar; traditional catalytic cracking or high-temperature cracking technologies can convert part of the tar, but they have poor adaptability to fluctuations in raw material composition and changes in gasification conditions, and cannot be dynamically adjusted according to real-time operating conditions, resulting in unstable purification efficiency; the treatment of dust is mostly a simple disposal method, and cannot form a coordinated resource utilization system with tar treatment. In addition, the existing technology usually operates independently, lacks a coordinated optimization mechanism and intelligent decision support based on real-time operating data of the system, resulting in low overall energy utilization efficiency and difficulty in improving resource recovery rate.

[0004] In view of the above problems, the existing technology needs to be improved. SUMMARY

[0005] In order to solve the problems existing in the prior art, the present application provides a resource recovery method and system for synchronous purification of tar and dust in biomass gasification tail gas, to solve the secondary pollution problem existing in the traditional process, improve the stability of purification efficiency, and realize the coordinated resource recovery of tar and dust.

[0006] In a first aspect, the present application provides a resource recovery method based on synchronous purification of tar and dust in biomass gasification tail gas, comprising the following steps:

[0007] S1, collecting the temperature, pressure and multi-component concentration data of the raw tail gas in real time by a multi-sensor array deployed at the outlet of the gasifier, transmitting the data to a central intelligent processing unit through an industrial Ethernet wired link, and obtaining a first real-time optimized operation parameter set and a second real-time optimized operation parameter set based on the real-time collected data;

[0008] S2, introducing the high-temperature raw tail gas from the gasifier into a catalytic cracking reactor equipped with a conventional catalyst suitable for cracking high-temperature heavy tar, and applying the first real-time optimized operation parameter set to the temperature control system and the feeding system of the catalytic cracking reactor, deep converting the heavy tar in the tail gas into combustible gas rich in hydrogen and carbon monoxide through catalytic cracking reaction, and obtaining primary purified gas with removed heavy tar and increased temperature;

[0009] S3, sending the primary purified gas into an integrated high-voltage electrostatic purifier, and applying the second real-time optimized operation parameter set to the voltage control system and the flow rate control system of the integrated high-voltage electrostatic purifier, making the residual light tar droplets and fine dust particles in the primary purified gas charged and captured through the synergistic effect of the high-voltage electrostatic field, and obtaining clean synthesis gas with removed most of the light tar and fine dust, and a concentrated mixture rich in hydrocarbons;

[0010] S4, continuously conveying the concentrated mixture to a spiral extrusion separation device to obtain liquid tar product and solid carbon-containing dust through mechanical extrusion operation and phase separation operation;

[0011] S5, mixing the solid carbon-containing dust and part of the liquid tar product at a predetermined ratio to prepare cylindrical composite fuel rods suitable for industrial combustion needs through an intelligent granulator, and finally realizing the collaborative resource recycling of tar and dust.

[0012] Further, in step S1, the multi-sensor array is arranged at multiple collecting points along the tail gas conveying path at the outlet of the gasifier, each collecting point comprising a temperature sensor, a pressure sensor and a gas component sensor for detecting the tar component concentration, dust particle concentration and combustible gas component concentration in the raw tail gas; the central intelligent processing unit dynamically analyzes and matches the multi-dimensional data collected to obtain the first real-time optimized operation parameter set and the second real-time optimized operation parameter set suitable for the subsequent catalytic cracking and electrostatic purification units.

[0013] Further, the application also proposes that in step S2, a plurality of catalyst bed layers are arranged in the catalytic cracking reactor, the catalyst bed layers are arranged in layers along the flow direction of the tail gas, and the porosity of the adjacent two layers of catalyst bed layers gradually decreases along the flow direction of the tail gas; the conventional catalyst suitable for cracking of high-temperature heavy tar is filled in each layer of bed layer, and the long-chain hydrocarbon compounds in the heavy tar are cracked into small-molecule combustible gas through catalytic cracking reaction.

[0014] Further, the application also proposes that in step S2, the temperature control system adjusts the reaction temperature in the catalytic cracking reactor by using a heat exchanger, the heat exchanger realizes heat transfer by circulating a heat conduction medium; the feed system controls the feed rate of the high-temperature raw tail gas into the catalytic cracking reactor by using a flow regulating valve; and the temperature control system and the feed system are cooperatively adjusted according to the first real-time optimized operation parameter set.

[0015] Further, the application also proposes that in step S3, the integrated high-voltage electrostatic purifier alternately arranges the thorn-shaped cathode and the flat-plate-shaped anode; the voltage control system adjusts the voltage difference between the cathode and the anode by using a voltage regulating module to form a gradient high-voltage electrostatic field with gradually increasing voltage along the flow direction of the tail gas; and after the primary purified gas enters the purifier, the fine dust particles are first charged in the low-voltage area at the inlet, and the light tar droplets are charged in the high-voltage area in the middle and rear sections along with the gas flow.

[0016] Further, the application also proposes that in step S3, the flow rate control system adjusts the flow rate of the primary purified gas in the integrated high-voltage electrostatic purifier by using a variable frequency fan; the residence time of the primary purified gas is determined by matching the flow rate with the volume of the internal cavity of the purifier, the internal cavity of the purifier is a straight cylinder structure and the inner wall of the cavity is provided with a flow guide rib, and the volume of the cavity is designed according to the gas processing capacity to meet the requirement of stable flow of the primary purified gas through the gradient high-voltage electrostatic field.

[0017] Further, the application also proposes that in step S4, the spiral extrusion separation device is provided with a spiral propelling assembly and a filtering separation assembly, the spiral blade of the spiral propelling assembly is made of wear-resistant stainless steel, and the pitch of the blade gradually decreases along the conveying direction of the concentrated mixture; the filtering separation assembly is arranged at the end of the device, the filtering separation assembly is a sintered metal filter screen, and the pore size of the filter screen is smaller than the particle size of the solid-state carbon-containing dust; and the concentrated mixture moves to the end under the pushing of the spiral propelling assembly and is continuously extruded.

[0018] Further, the application also proposes that in step S4, the spiral extrusion separation device is provided with a heat conduction medium heating interlayer outside, and the heat conduction medium heating interlayer wraps the entire side wall of the cavity of the device; the heat conduction medium heating interlayer drives the flow of the heat conduction medium by using a circulating pump to realize temperature control of the concentrated mixture inside the device, and the temperature control is realized by adjusting the circulation rate of the heat conduction medium.

[0019] Further, the present application also proposes that in step S5, the preset ratio of the solid carbon-containing dust and the liquid tar product is determined according to the combustion heat value, mechanical strength and ash control requirements of the composite fuel rod, and the specific ratio is verified through the preliminary combustion performance test; the intelligent granulator is provided with replaceable forming molds, the mold holes of the forming molds are in a cylindrical shape, and the particle size of the cylindrical composite fuel rod is determined according to the nozzle size of the combustion equipment; the intelligent granulator is provided with a drying assembly in a hot air circulation heating mode to remove the moisture of the prepared composite fuel rod.

[0020] In the second aspect, the present application also provides a resource recovery system based on the synchronous purification of tar and dust in a biomass gasification tail gas, which is applied to the resource recovery method based on the synchronous purification of tar and dust in a biomass gasification tail gas as in the first aspect; the resource recovery system based on the synchronous purification of tar and dust in a biomass gasification tail gas comprises:

[0021] A data acquisition and processing module is used to collect original tail gas temperature, pressure and multi-component concentration data through a multi-sensor array at the outlet of the gasifier, the multi-sensor array contains temperature, pressure and gas component detection elements, and the data is transmitted to a central intelligent processing unit through an industrial Ethernet wired link, and the central intelligent processing unit processes to obtain a first real-time optimized operation parameter set and a second real-time optimized operation parameter set;

[0022] A catalytic cracking reaction module is used to introduce high-temperature original tail gas into a catalytic cracking reactor provided with a conventional catalyst suitable for cracking high-temperature heavy tar in the art, a plurality of catalyst bed layers are arranged in the reactor, the first real-time optimized operation parameter set is applied to a temperature control system and a feeding system, the temperature control system adopts a heat exchanger, and the feeding system adopts a flow regulating valve, and a primary purified gas is obtained through catalytic cracking reaction;

[0023] A high-voltage electrostatic purification module is used to send the primary purified gas into an integrated high-voltage electrostatic purifier, the purifier is alternately arranged with a thorn-shaped cathode and a flat-plate-shaped anode, the internal cavity of the purifier is in a straight cylinder structure and the inner wall of the cavity is provided with a flow guide rib, the second real-time optimized operation parameter set is applied to a voltage control system and a flow rate control system, the voltage control system contains a voltage regulating module, the flow rate control system adopts a variable frequency fan, light tar mist and fine dust particles are captured through a high-voltage electrostatic field, and clean synthesis gas and a concentrated mixture are obtained;

[0024] An extrusion separation module is used to send the concentrated mixture into a spiral extrusion separation device, the device has a spiral propelling assembly and a sintered metal filter screen, the blades of the spiral propelling assembly are made of wear-resistant stainless steel, the pore size of the filter screen is smaller than the particle size of the solid carbon-containing dust, the outer side of the device is provided with a heat-conducting medium heating interlayer and the temperature is adjusted through the circulation rate of the heat-conducting medium, and the liquid tar product and the solid carbon-containing dust are obtained through mechanical extrusion operation and phase separation operation.

[0025] The composite fuel preparation module is used to mix solid carbonaceous dust with a portion of liquid tar products in a preset ratio. The preset ratio is determined by prior combustion performance testing. The module then uses an intelligent granulator with replaceable molding dies to prepare cylindrical composite fuel rods that meet industrial combustion requirements. The die hole size of the replaceable molding dies is adapted to the nozzle size of different combustion equipment. The granulator is equipped with a drying component that uses hot air circulation heating.

[0026] This application provides a resource recovery method and system for the simultaneous purification of tar and dust in biomass gasification tail gas. By collecting data in real time through a multi-sensor array and dynamically optimizing operating parameters, and combining the synergistic effect of catalytic cracking and gradient high-voltage electrostatic field, the method simultaneously achieves deep tar conversion and efficient dust collection. At the same time, the separated products are prepared into composite fuel rods, solving the secondary pollution problem of traditional processes. It has the advantages of stable purification efficiency and high resource recovery rate. Attached Figure Description

[0027] Figure 1 This is a schematic flowchart of a resource recovery method for simultaneous purification of tar and dust in biomass gasification tail gas provided in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of a resource recovery method for simultaneously purifying tar and dust in biomass gasification tail gas, provided in an embodiment of the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In the description of this invention, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this invention is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

[0032] In traditional biomass gasification tail gas treatment processes, the step-by-step, independent purification strategies limit the efficiency of tar and dust removal; physical separation methods rely on water washing processes to generate high-concentration organic wastewater, causing secondary pollution and increasing water treatment costs, while failing to recover the chemical energy of tar; catalytic cracking or high-temperature cracking processes are not adaptable to fluctuations in gasification conditions, and operating parameters cannot be adjusted in real time, resulting in fluctuations in the cracking efficiency of heavy tar with changes in feedstock composition; dust and tar treatment units operate independently, lacking data collaboration and resource integration, resulting in ineffective recovery of solid carbon-containing dust and waste of carbon resources; the system lacks a global optimization mechanism based on real-time data, and the control parameters of each unit cannot dynamically match changes in tail gas composition, resulting in overall energy efficiency and resource recovery rates falling below expected thresholds.

[0033] For example, in a purification system using a cyclone separator and a water scrubbing tower connected in series, temperature fluctuations in the gasifier outlet exhaust gas cause tar to condense and undergo phase change. Incompletely cracked heavy tar forms adhesion deposits on the inner wall of the pipes, blocking the gas transport path. The tar-containing wastewater generated by the water scrubbing tower requires additional chemical treatment, increasing operating costs and posing a risk of pollutant leakage. The electrostatic collection unit experiences unstable charging efficiency due to dynamic changes in exhaust gas velocity and dust concentration, leading to an increased escape rate of fine particles. The uneven temperature field distribution within the catalytic cracking reactor and the fixed porosity of the catalyst bed cannot adapt to the cracking kinetics requirements of different molecular weight tar components, resulting in residual long-chain hydrocarbons in the cracking products. Furthermore, the sensor data from each unit is not integrated into the central processing system, causing control commands to lag behind changes in operating conditions, resulting in a periodic decrease in purification efficiency.

[0034] If the above problems are not addressed, tar condensation and deposition will accelerate pipeline corrosion, shorten equipment maintenance cycles, and increase the frequency of unplanned downtime; the continuous accumulation of tar-containing wastewater treatment load will cause operating costs to exceed economic feasibility; incompletely cracked tar components and escaped dust will accumulate in subsequent processes, causing carbon surface deactivation of syngas utilization catalysts and reducing product conversion efficiency; the failure to recover hydrocarbon resources in a coordinated manner will result in biomass energy utilization rates falling below the thermodynamic theoretical limit; the system lacks global optimization capabilities, and the cumulative effect of energy consumption in each unit is significant, making the overall energy efficiency unable to meet the requirements of continuous industrial production.

[0035] To address the aforementioned issues, this application first analyzes the inherent shortcomings of traditional stepwise purification strategies, finding that the separation of tar and dust treatment units leads to low resource recovery efficiency. Regarding the secondary pollution generated by the water washing process, this application explores a technical approach combining catalytic cracking and high-voltage electrostatic capture. Catalytic cracking avoids wastewater generation, while the high-voltage electrostatic field can simultaneously treat gaseous and solid pollutants. For the bottleneck of dynamically adjustable operating parameters, this application considers deploying a multi-sensor array at the gasifier outlet to establish a linkage control mechanism for the purification units through real-time data acquisition. Furthermore, addressing the waste of hydrocarbon resources, this application studies a synergistic recovery path for tar and dust, proposing a technical concept of compounding the separated products into fuel rods. By integrating real-time monitoring, parameter optimization, and resource recovery modules, a closed-loop treatment system is ultimately formed.

[0036] In response, this application proposes a resource recovery method for the simultaneous purification of tar and dust in biomass gasification tail gas, referring to... Figure 1 , Figure 1 This is a schematic flowchart of a resource recovery method for simultaneously purifying tar and dust in biomass gasification tail gas provided by the present invention. The method includes the following steps:

[0037] S1, through a multi-sensor array deployed at the gasifier outlet, collects the temperature, pressure and multi-component concentration data of the raw exhaust gas in real time, and transmits the data to the central intelligent processing unit via an industrial Ethernet wired link. The central intelligent processing unit processes the real-time collected data to obtain a first set of real-time optimized operating parameters and a second set of real-time optimized operating parameters.

[0038] S2, the high-temperature raw tail gas from the gasifier is introduced into a catalytic cracking reactor equipped with a conventional catalyst known in the art for high-temperature heavy tar cracking. At the same time, a first set of real-time optimized operating parameters is applied to the temperature control system and feed system of the catalytic cracking reactor. Through the catalytic cracking reaction, the heavy tar in the tail gas is deeply converted into combustible gas rich in hydrogen and carbon monoxide, and a primary purified gas with heavy tar removed and temperature increased is obtained.

[0039] S3, the primary purified gas is sent into the integrated high-voltage electrostatic purifier. At the same time, the second set of real-time optimized operating parameters is applied to the voltage control system and flow rate control system of the integrated high-voltage electrostatic purifier. Through the synergistic effect of the high-voltage electrostatic field, the light tar droplets and fine dust particles remaining in the primary purified gas are charged and captured respectively, and clean synthesis gas with most of the light tar and fine dust removed is obtained, as well as a concentrated mixture rich in hydrocarbons.

[0040] S4, the concentrated mixture is continuously fed to the screw extrusion separator, and through mechanical extrusion and phase separation operations, liquid tar product and solid carbon-containing dust are obtained;

[0041] S5 mixes solid carbonaceous dust with a portion of liquid tar products in a preset ratio and prepares them into cylindrical composite fuel rods suitable for industrial combustion needs through an intelligent granulator, ultimately achieving the synergistic resource recovery of tar and dust.

[0042] Among them, the multi-sensor array refers to the multiple detection devices, including temperature sensors, pressure sensors and gas component sensors, that are set at intervals along the tail gas conveying path of the gasifier outlet. Specifically, thermocouples, piezoelectric sensors and infrared spectrometers can be used to acquire data on the temperature, pressure, tar concentration, dust concentration and combustible gas concentration of the raw tail gas in real time, so as to provide basic data support for subsequent parameter optimization.

[0043] The central intelligent processing unit refers to the computing module that receives data from the multi-sensor array and performs dynamic analysis. Specifically, it can be implemented using an industrial control computer or an embedded processor combined with an appropriate analysis algorithm. Through real-time data processing, it generates operating parameters that are adapted to different purification units, thus solving the problem of unstable purification efficiency caused by the inability to dynamically adjust the parameters in traditional methods.

[0044] The catalytic cracking reactor refers to a reaction device filled with high-temperature heavy tar cracking catalyst. Specifically, it can be implemented by adopting a multi-layer catalyst bed structure with decreasing porosity. Through catalytic cracking, heavy tar is converted into small molecule combustible gas, avoiding tar condensation and clogging of pipelines and increasing the calorific value of syngas.

[0045] Among them, the integrated high-voltage electrostatic purifier refers to a gas purification device equipped with a gradient high-voltage electrostatic field. Specifically, it can be achieved by combining alternating thorn-type cathodes and flat-plate anodes with variable frequency fan flow control. By simultaneously removing light tar droplets and dust through charging and collection, it solves the problems of equipment redundancy and secondary pollution caused by step-by-step purification.

[0046] Among them, the spiral extrusion separation device refers to the equipment that achieves solid-liquid separation through mechanical extrusion. Specifically, it can be achieved by combining wear-resistant stainless steel spiral blades with sintered metal filter screens and a heat-conducting medium to heat the jacket, separating the concentrated mixture into liquid tar and solid dust, thus avoiding the generation of organic wastewater by the water washing method.

[0047] Among them, the intelligent pelletizer refers to the equipment that mixes solid dust and liquid tar to form a pellet. Specifically, it can be achieved by using replaceable cylindrical molds and hot air circulation drying components. It can prepare composite fuel rods by mixing in a preset ratio to achieve the collaborative resource recycling of waste.

[0048] The core innovation of this application lies in the real-time driving of catalytic cracking and high-voltage electrostatic purification unit through multi-sensor data, which simultaneously removes tar and dust in a single process, and achieves full resource recovery based on spiral extrusion separation and intelligent granulation, thereby eliminating secondary pollution and improving the economic and environmental benefits of the biomass gasification system.

[0049] The working process and principle of this application is as follows: a multi-sensor array is deployed at the gasifier outlet to collect real-time data on the temperature, pressure and multi-component concentration of the raw exhaust gas. The collected data is transmitted to the central intelligent processing unit via an industrial Ethernet wired link. The central intelligent processing unit obtains two sets of real-time optimized operating parameters based on the real-time data processing.

[0050] High-temperature raw exhaust gas is introduced into a catalytic cracking reactor, which is equipped with a conventional catalyst adapted for high-temperature heavy tar cracking. The first set of real-time optimized operating parameters is applied to the temperature control system and feed system of the catalytic cracking reactor. Through the catalytic cracking reaction, the heavy tar in the exhaust gas is transformed into combustible gas rich in hydrogen and carbon monoxide, resulting in primary purified gas with heavy tar removed and temperature increased.

[0051] The primary purified gas is fed into an integrated high-voltage electrostatic purifier. A second set of real-time optimized operating parameters is applied to the voltage control system and flow rate control system of the electrostatic purifier. The high-voltage electrostatic field charges and captures the light tar droplets and fine dust particles remaining in the primary purified gas, resulting in clean synthesis gas with most of the light tar and fine dust removed, as well as a concentrated mixture rich in hydrocarbons.

[0052] The concentrated mixture is continuously fed to a screw extrusion separator, where liquid tar product and solid carbonaceous dust are obtained through mechanical extrusion and phase separation operations.

[0053] Solid carbonaceous dust and a portion of liquid tar products are mixed in a preset ratio and then processed into cylindrical composite fuel rods suitable for industrial combustion needs using an intelligent granulator, thereby achieving the synergistic resource recovery of tar and dust.

[0054] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0055] The multi-sensor array is set with multiple sets of collection points at intervals along the gasification furnace outlet tail gas conveying path. The spacing between adjacent points is determined according to the requirements of the pipeline flow field. Each set of points includes a temperature sensor, a pressure sensor, and a gas component sensor. The gas component sensor detects the concentration of tar components, dust particles, and combustible gas components in the raw tail gas. The collected data is transmitted to the central intelligent processing unit via industrial Ethernet.

[0056] The catalytic cracking reactor is equipped with multiple catalyst beds, which are arranged in layers along the direction of tail gas flow. The porosity of adjacent catalyst beds gradually decreases along the direction of tail gas flow. Conventional catalysts suitable for high-temperature heavy tar cracking are filled in each layer of the bed. The amount of catalyst in each layer is configured inversely proportional to the porosity gradient. The catalyst particle size distribution is matched with the porosity gradient. The temperature control system uses a heat exchanger to adjust the reaction temperature in the reactor. The heat exchanger achieves heat transfer through a circulating heat transfer medium. The feeding system controls the feed rate of high-temperature raw tail gas into the reactor through a flow regulating valve.

[0057] The integrated high-voltage electrostatic purifier features alternating arrangement of barbed cathodes and flat anodes. The voltage control system adjusts the voltage difference between the cathodes and anodes via a voltage regulating module, forming a gradient high-voltage electrostatic field with the voltage gradually increasing along the exhaust gas flow direction. The flow rate control system adjusts the flow rate of the primary purified gas within the purifier via a variable frequency fan. The variable frequency fan achieves speed regulation through a compatible variable frequency control unit. The internal cavity of the purifier has a cylindrical structure with guide ribs on the inner wall. The cavity volume is designed according to the gas processing capacity.

[0058] The spiral extrusion separation device includes a spiral propulsion assembly and a filtration separation assembly. The spiral blades of the spiral propulsion assembly are made of wear-resistant stainless steel, and the blade pitch gradually decreases along the conveying direction of the concentrated mixture. The filtration separation assembly is located at the end of the device and consists of a sintered metal filter screen. The pore size of the filter screen is smaller than the particle size of solid carbon-containing dust. A heat-conducting medium heating jacket is provided on the outside of the device, covering the entire side wall of the device cavity. The heat-conducting medium heating jacket is driven by a circulating pump to flow the heat-conducting medium, thereby achieving temperature control of the concentrated mixture inside the device.

[0059] The preset ratio of solid carbonaceous dust to liquid tar products is determined according to the calorific value, mechanical strength and ash content control requirements of the composite fuel rods; the intelligent granulator is equipped with a replaceable molding die with a cylindrical die hole shape and the die hole size is adapted to the nozzle size of the combustion equipment; the intelligent granulator is equipped with a drying component with hot air circulation heating to remove moisture from the prepared composite fuel rods so that the moisture content of the fuel rods meets the storage requirements.

[0060] Through the above scheme, this application achieves simultaneous and efficient purification and full resource recovery of tar and dust in biomass gasification tail gas. The technical path combining catalytic cracking and high-voltage electrostatic capture avoids wastewater generation and eliminates secondary pollution. The linkage control mechanism of real-time data acquisition by multi-sensor array and central intelligent processing unit enables the dynamic adjustment of purification unit operating parameters to adapt to fluctuations in gasification conditions. The technical concept of synergistic recovery of tar and dust into fuel rods improves the utilization rate of hydrocarbon resources. The overall scheme forms a closed-loop treatment system, enhancing the economic efficiency and environmental friendliness of biomass gasification technology.

[0061] In some of the solutions described above in this application, the deployment of multi-sensor arrays fails to cover the complete flow field distribution of the exhaust gas transport path at the gasifier outlet. Data from a single acquisition point cannot reflect the spatial variation of exhaust gas parameters, resulting in deviations between the real-time optimized operating parameters generated by the central intelligent processing unit and the actual operating conditions.

[0062] This application further proposes a multi-sensor array with multiple sets of collection points spaced along the gasifier outlet tail gas delivery path. Each set of points includes a temperature sensor, a pressure sensor, and a gas component sensor. The gas component sensor is used to detect the concentration of tar components, dust particles, and combustible gas components in the raw tail gas. The central intelligent processing unit performs dynamic analysis and parameter matching on the collected multi-dimensional data to obtain a set of real-time optimized operating parameters adapted to the subsequent catalytic cracking and electrostatic purification units.

[0063] The sampling points are distributed at intervals along the exhaust gas transport path, and the distance between adjacent points is determined according to the characteristics of the gasifier outlet pipeline. The temperature sensor is of the type adapted to high-temperature operating conditions, the pressure sensor is of the type adapted to the exhaust gas pressure range, and the gas component sensor is equipped with an infrared spectroscopy analysis module and a laser scattering particulate matter detection module. Dynamic analysis is achieved through a multivariate regression model, and parameter matching is based on the preset catalytic cracking reaction kinetic equation and electrostatic capture efficiency curve.

[0064] Specifically, a set of sensors is deployed at set intervals along the exhaust gas delivery path, and each set of sensors synchronously collects temperature, pressure and composition data;

[0065] Temperature data reflects the thermodynamic state of exhaust gas, pressure data is used to calculate flow resistance, and gas composition data includes the concentration distribution of tar, dust and combustible gases.

[0066] The central intelligent processing unit inputs multiple sets of data into the dynamic analysis model, and by comparing them with the historical operating condition database, generates the temperature control threshold and feed rate range required for the catalytic cracking reactor, while simultaneously calculating the voltage gradient distribution and flow rate control parameters of the high-voltage electrostatic purifier.

[0067] For example, when a sudden increase in tar concentration is detected at a certain collection point, the dynamic analysis model automatically adjusts the temperature control target of the catalytic cracking reactor to a temperature range suitable for heavy tar cracking, and simultaneously adjusts the inlet voltage of the electrostatic purifier to a range suitable for charging requirements. As a result, the spatial distribution characteristics of multi-dimensional data are fully captured, and the accuracy of generating the set of operating parameters is improved.

[0068] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0069] A multi-sensor array is set with multiple sets of collection points at intervals along the tail gas delivery path of the gasifier outlet. The spacing between adjacent points is determined according to the requirement of covering the complete flow field. Each set of points includes a temperature sensor, a pressure sensor, and a gas component sensor. The gas component sensor is used to detect the concentration of tar component, dust particle concentration, and combustible gas component in the raw tail gas. The central intelligent processing unit performs dynamic analysis and parameter matching on the collected multi-dimensional data to obtain the first set of real-time optimized operating parameters and the second set of real-time optimized operating parameters adapted to the subsequent catalytic cracking and electrostatic purification units.

[0070] Specifically, the multi-sensor array consists of multiple sets of acquisition points, which are set along the exhaust gas delivery pipeline at intervals adapted to flow field detection. Each set of points is equipped with a temperature sensor adapted to high-temperature operating conditions, a pressure sensor adapted to exhaust gas pressure, and a gas component sensor with multi-component detection function.

[0071] The gas component sensor uses Fourier transform infrared spectroscopy to detect the concentration of tar, dust and combustible gases.

[0072] The central intelligent processing unit employs an industrial-grade computer equipped with suitable analysis algorithms to perform real-time analysis of the collected data, generating a first set of real-time optimized operating parameters and a second set of real-time optimized operating parameters. The first set of real-time optimized operating parameters includes parameters such as the temperature and feed rate of the catalytic cracking reactor, while the second set of real-time optimized operating parameters includes parameters such as the voltage and gas flow rate of the electrostatic purifier.

[0073] Through the above technical solution, this application realizes multi-dimensional real-time monitoring of gasification tail gas, providing precise operating parameter guidance for subsequent purification units; thus, the catalytic cracking and electrostatic purification processes can be dynamically adjusted according to the tail gas characteristics, improving purification efficiency and stability; furthermore, the multi-point sensor array can capture the spatial distribution changes of tail gas components, providing a basis for system diagnosis and optimization, and effectively avoiding data deviations that may be caused by single-point sampling.

[0074] In some of the above-mentioned schemes in this application, the catalyst bed structure in the catalytic cracking reactor is simple and the porosity is fixed, which leads to insufficient contact between long-chain hydrocarbons and catalysts during the cracking of heavy tar, and some macromolecules fail to be effectively broken, affecting the conversion efficiency. At the same time, the fixed porosity easily causes uneven airflow distribution inside the bed, excessive pressure drop in local areas, and increases the risk of blockage.

[0075] This application further proposes a multi-layered catalyst bed in the catalytic cracking reactor, with the catalyst beds arranged in layers along the tail gas flow direction. The porosity of adjacent catalyst beds gradually decreases along the tail gas flow direction. Conventional catalysts known in the art and adapted for high-temperature heavy tar cracking are filled in each layer of the bed. Through the catalytic cracking reaction, the long-chain hydrocarbons in the heavy tar are broken down into small-molecule combustible gases.

[0076] The multi-layer catalyst bed adopts a gradient porosity design. The porosity of the first layer is set to meet the requirements of initial tail gas treatment, the porosity of the middle layer is adjusted to meet the requirements of medium molecular weight tar cracking, and the porosity of the last layer is set to meet the requirements of deep cracking of small molecule tar. The catalyst packing amount of each layer is configured inversely proportional to the porosity gradient, and the catalyst particle size distribution is matched with the porosity gradient. The particle size of the first layer catalyst is set to meet the requirements of preliminary cracking of large tar particles, and the particle size of the last layer catalyst is set to meet the requirements of deep reaction of small molecule tar.

[0077] Specifically, after the high-temperature raw exhaust gas enters the catalytic cracking reactor, the first high-porosity bed achieves the initial cracking of large-particle tar substances, reducing the processing load of subsequent beds. The porosity of the middle layer gradually decreases, promoting the increase of gas flow velocity, enhancing gas-solid contact strength, and accelerating the cracking of medium-molecular-weight tar. The final low-porosity bed, through dense catalyst arrangement, extends the gas residence time, ensuring the full reaction of small-molecule tar substances. The change in porosity gradient creates a velocity gradient between the multiple bed layers, avoiding excessively high flow velocities in local areas that could lead to catalyst wear. The decreasing catalyst particle size design in each layer further optimizes the pore distribution, with the small-particle catalyst in the final layer increasing the specific surface area and improving cracking efficiency. Through the synergistic regulation of multi-layer porosity and catalyst particle size, the conversion rate of heavy tar cracking is improved, and the overall pressure drop of the bed is reduced.

[0078] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0079] The catalytic cracking reactor is equipped with multiple catalyst beds, which are arranged in layers along the direction of tail gas flow. The porosity of adjacent catalyst beds gradually decreases along the direction of tail gas flow. Conventional catalysts known in the art for high-temperature heavy tar cracking are filled in each bed layer. Through catalytic cracking reaction, long-chain hydrocarbons in heavy tar are broken down into small-molecule combustible gases.

[0080] Specifically, the catalytic cracking reactor adopts a vertical cylindrical structure with multiple catalyst beds inside. The first bed is located at the top of the reactor and uses a high-porosity catalyst suitable for the initial cracking of large-particle tar. The second bed is located below the first bed and uses a medium-porosity catalyst suitable for the cracking of medium-molecular-weight tar. The third bed is located below the second bed and uses a low-porosity catalyst suitable for the reaction of small-molecule tar. The fourth bed is located at the bottom of the reactor and uses a low-porosity catalyst suitable for the deep cracking of tar. All catalysts in each layer are nickel-based catalysts, which have good high-temperature heavy tar cracking performance.

[0081] High-temperature raw exhaust gas enters from the top of the reactor and flows sequentially through four catalyst beds. Due to the progressively decreasing porosity of each layer, the residence time of the exhaust gas within the reactor gradually increases, resulting in more thorough contact with the catalyst. Simultaneously, the progressively smaller catalyst particle size also increases the gas-solid contact area, further improving the catalytic cracking efficiency. Through this multi-layered structural design, long-chain hydrocarbons in heavy tar are gradually cracked into smaller molecule combustible gases, such as hydrogen, carbon monoxide, and methane.

[0082] Through the above technical solution, this application achieves highly efficient catalytic cracking of heavy tar. The multi-layer catalyst bed structure ensures full contact between the exhaust gas and the catalyst, the gradient change in porosity prolongs the gas residence time, and the gradual reduction in catalyst particle size increases the gas-solid contact area. This design significantly improves the catalytic cracking efficiency, enabling deep conversion of heavy tar. At the same time, the layered structure avoids rapid clogging of the catalyst bed, extends the catalyst's service life, and improves the long-term operational stability of the system. Furthermore, by converting heavy tar into combustible gas, not only is pollution and corrosion of downstream equipment reduced, but the overall energy utilization efficiency of the gasification system is also improved.

[0083] In some of the above-mentioned schemes in this application, the temperature control system and the feeding system of the catalytic cracking reactor need to dynamically adjust the operating parameters according to real-time data. However, the traditional temperature control method uses a single heat source to directly heat or cool, which makes it difficult to achieve uniform temperature distribution in the reactor. Moreover, the feeding rate and temperature adjustment lack a linkage mechanism, resulting in fluctuations in the efficiency of the catalytic cracking reaction and affecting the conversion rate of heavy tar.

[0084] This application further proposes that the temperature control system uses a heat exchanger to adjust the reaction temperature inside the catalytic cracking reactor, and the heat exchanger achieves heat transfer through a circulating heat transfer medium; the feeding system controls the feed rate of high-temperature raw tail gas into the catalytic cracking reactor through a flow regulating valve; the temperature control system and the feeding system are coordinated and adjusted according to a first set of real-time optimized operating parameters.

[0085] The circulating heat transfer medium of the heat exchanger can be selected to be suitable for high-temperature operating conditions. The heat transfer medium circulates between the heat exchanger and the external heating or cooling device. The flow rate of the heat transfer medium is changed by adjusting the speed of the circulating pump, thereby adjusting the temperature distribution inside the reactor.

[0086] The flow regulating valve uses an electric or pneumatic actuator. The valve opening is automatically adjusted according to the preset flow value in the first set of real-time optimized operating parameters to ensure that the feed rate and temperature adjustment are synchronized.

[0087] The coordinated adjustment of the temperature control system and the feeding system is achieved through the central intelligent processing unit. The first real-time optimized operation parameter set includes a correspondence table between temperature setpoints and flow rate setpoints. The central intelligent processing unit dynamically calls the parameter combination in the corresponding table based on the real-time collected exhaust gas component concentration data.

[0088] Specifically, when the high-temperature raw exhaust gas enters the catalytic cracking reactor, temperature sensors monitor the temperature distribution of each catalyst bed in real time, and gas component sensors detect the concentration of tar cracking products.

[0089] The central intelligent processing unit matches the first set of real-time optimized operating parameters based on the detection data, and sends speed adjustment commands to the circulating pump of the heat exchanger to match the flow rate of the heat transfer medium with the reaction temperature requirements.

[0090] Meanwhile, the flow regulating valve adjusts its opening according to the feed rate setpoint to ensure that the exhaust gas flow matches the optimal pyrolysis reaction time under the current temperature conditions.

[0091] For example, when an increase in tar concentration is detected, the central intelligent processing unit simultaneously increases the circulation rate of the heat transfer medium to raise the reaction temperature and reduces the feed rate to extend the reaction residence time, thereby achieving efficient cracking of heavy tar. The coordinated adjustment of temperature control and feed avoids the imbalance of reaction conditions caused by the adjustment of a single parameter, ensuring the stability and continuity of the catalytic cracking reaction.

[0092] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0093] The temperature control system uses a heat exchanger to adjust the reaction temperature inside the catalytic cracking reactor; the heat exchanger achieves heat transfer through a circulating heat transfer medium; the feed system controls the feed rate of high-temperature raw exhaust gas into the catalytic cracking reactor through a flow regulating valve; the temperature control system and the feed system are coordinated and adjusted according to the first set of real-time optimized operating parameters.

[0094] Specifically, the heat exchanger adopts a shell-and-tube structure, with a heat transfer medium adapted to high-temperature operating conditions flowing through the shell side, and the gas inside the catalytic cracking reactor flowing through the tube side. The heat transfer medium circulation system includes a circulation pump, a heater, and a cooler. By adjusting the circulation rate and temperature of the heat transfer medium, precise control of the reactor temperature is achieved. For example, when it is necessary to increase the reaction temperature, the circulation rate of the heat transfer medium is increased and the temperature of the heat transfer medium is increased; when it is necessary to decrease the reaction temperature, the circulation rate of the heat transfer medium is decreased or the cooler is activated to lower the temperature of the heat transfer medium.

[0095] The feeding system uses an electric regulating valve as the flow control valve, and the valve opening can be continuously adjusted within the range of flow control. By changing the valve opening, the feeding rate of the high-temperature raw exhaust gas can be precisely controlled. For example, when it is necessary to increase the feed rate, the valve opening is increased; when it is necessary to decrease the feed rate, the valve opening is decreased.

[0096] The coordinated adjustment of the temperature control system and the feeding system is executed by the central controller. The central controller receives real-time data from a multi-sensor array, processes it through an algorithm to generate a first set of real-time optimized operating parameters. This parameter set includes the target reaction temperature and the target feed rate. The central controller converts the target reaction temperature into heat transfer medium circulation parameters and sends them to the heat exchanger control unit; it converts the target feed rate into valve opening commands and sends them to the flow regulating valve control unit. In this way, the coordinated optimization adjustment of the temperature control system and the feeding system is achieved.

[0097] Through the above technical solution, this application achieves real-time optimization and adjustment of the operating parameters of the catalytic cracking reactor. The temperature control system uses a heat exchanger to precisely control the reaction temperature and avoid the impact of temperature fluctuations on the catalytic cracking effect; the feed system uses flow regulating valves to flexibly adjust the feed rate to adapt to the tail gas treatment requirements under different gasification conditions; the temperature control system and the feed system are coordinated and adjusted according to real-time optimized parameters to ensure that the catalytic cracking reaction takes place under optimal conditions, improves the conversion efficiency of heavy tar, and reduces the load on downstream equipment; at the same time, this dynamic adjustment method enhances the system's adaptability to fluctuations in feedstock and operating conditions, and improves the overall stability and reliability of operation.

[0098] In some of the solutions described above in this application, the integrated high-voltage electrostatic purifier uses a high-voltage electrostatic field to synergistically capture light tar droplets and fine dust particles in the primary purified gas. However, in practical applications, the charging efficiency of particles with different sizes and properties varies in a single uniform electric field, resulting in unstable capture performance.

[0099] This application further proposes an integrated high-voltage electrostatic purifier with alternating arrangement of barbed cathodes and flat anodes; the voltage control system adjusts the voltage difference between the cathode and anode through a voltage regulating module to form a gradient high-voltage electrostatic field with the voltage gradually increasing along the exhaust gas flow direction; after the primary purified gas enters the purifier, the fine dust particles are first charged in the low-voltage region at the inlet, and the light tar droplets flow with the airflow to the high-voltage region in the middle and rear sections for charging.

[0100] The alternating arrangement of barbed cathodes and flat anodes enhances the corona region through the tip discharge effect, thereby improving the particulate matter charging efficiency. The gradient high-voltage electrostatic field is formed through segmented voltage regulation, with the inlet voltage set to a range suitable for dust charging and gradually increased to a range suitable for tar droplet charging in the middle and later stages. Fine dust particles are preferentially charged in the low-voltage region to avoid particle rebound or secondary re-entrainment caused by high voltage. Light tar droplets, due to their small particle size and high surface tension, require a higher electric field strength to achieve effective charging, so they are charged in the high-voltage region in the middle and later stages.

[0101] Specifically, after the primary purified air enters the purifier, fine dust particles gain charge through corona discharge in the low-voltage electrostatic field of the inlet area. These charged particles migrate towards the electrodes and are captured under the influence of the electric field. Light tar droplets are carried by the airflow into the high-voltage region of the middle and later sections, where they complete charging under the enhanced electric field strength. These charged droplets then aggregate towards the electrodes as the electric field gradient changes. The gradient voltage distribution is dynamically adjusted by a voltage regulation module to match the charging characteristics of different particles, avoiding insufficient charging or energy waste caused by a single voltage. This scheme optimizes the charging efficiency of different particles through segmented voltage regulation, improving the overall capture effect while reducing energy consumption.

[0102] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0103] The integrated high-voltage electrostatic purifier has alternating arrangement of barbed cathodes and flat anodes. The voltage control system adjusts the voltage difference between the cathodes and anodes through the voltage regulation module, forming a gradient high-voltage electrostatic field with the voltage gradually increasing along the exhaust gas flow direction. After the primary purified gas enters the purifier, the fine dust particles are first charged in the low-voltage area at the inlet, and the light tar droplets flow with the airflow to the high-voltage area in the middle and rear sections for charging.

[0104] Specifically, the integrated high-voltage electrostatic purifier adopts a cylindrical structure, with multiple sets of barbed cathodes and flat anodes arranged sequentially along the axial direction inside. The barbed cathodes are composed of multiple metal needles adapted for tip discharge, with the needle tips pointing towards the airflow direction. The flat anodes are made of stainless steel and the surface is polished to reduce dust adhesion. The spacing between adjacent cathodes and anodes is set according to the requirements of the electric field strength.

[0105] Furthermore, the voltage control system includes multiple independent high-voltage power supply modules, each connected to a set of cathodes and anodes. The output voltage of each power supply is adjusted step by step by a voltage regulating module to form a gradient electrostatic field with the voltage gradually increasing along the airflow direction. For example, the inlet voltage is set to a range suitable for dust charging, the middle voltage is set to a range suitable for medium charging requirements, and the outlet voltage is set to a range suitable for tar droplet charging.

[0106] Thus, after fine dust particles are initially charged in the low-voltage region at the inlet, they enter the high-voltage region with the airflow for further charging and capture. Light tar droplets are mainly charged and captured in the high-voltage region in the middle and later stages. This gradient electric field design can effectively improve the charging and capture efficiency of particles of different sizes.

[0107] Through the above technical solution, this application achieves efficient zoned collection of pollutants with different characteristics. The gradient electrostatic field design adapts to the differences in charge characteristics between dust and tar droplets, avoiding the problem that a single electric field strength cannot take into account different pollutants. The low voltage area can effectively prevent secondary dust re-entrainment, while the high voltage area enhances the collection ability of difficult-to-charge tar droplets. Overall, it improves the dust removal and tar removal efficiency of the electrostatic purifier, reduces energy consumption, and extends the service life of the equipment.

[0108] In some of the solutions described above in this application, the integrated high-voltage electrostatic purifier achieves the charged capture of tar droplets and dust particles through a high-voltage electrostatic field. However, the flow rate and residence time of the primary purified gas in the purifier directly affect the charging efficiency and capture effect. The traditional fixed wind speed mode is difficult to match the gas processing volume under different working conditions, resulting in airflow turbulence or insufficient residence time, which affects the purification efficiency.

[0109] This application further proposes a flow rate control system that adjusts the flow rate of the primary purified gas in the integrated high-voltage electrostatic purifier by using a variable frequency fan; the residence time of the primary purified gas is determined by matching the flow rate with the internal cavity volume of the purifier. The internal cavity of the purifier has a cylindrical structure and the inner wall of the cavity is provided with flow guiding ribs. The cavity volume is designed according to the gas processing capacity to meet the requirement of the primary purified gas flowing stably through the gradient high-voltage electrostatic field.

[0110] Among them, the variable frequency fan achieves continuous control of gas flow rate by adjusting the motor speed, the straight cylindrical cavity structure avoids abrupt changes in airflow direction, and the guide ribs are spirally arranged along the inner wall of the cavity to suppress turbulence formation. The matching of cavity volume and gas processing capacity is based on a preset gas flow rate and residence time relationship model, which is established by fitting experimental data.

[0111] Specifically, the variable frequency fan receives the target flow rate signal from the second real-time optimized operating parameters and dynamically adjusts the output frequency to change the gas flow rate; a laminar flow state is formed inside the cylindrical cavity, and the guide ribs divide the airflow into multiple parallel channels to reduce local eddies; the cavity volume is determined based on the product of the gas volume processed per unit time and the target residence time, ensuring that the gas residence time in the high-voltage electrostatic field reaches the threshold required for charging and capture; when the purifier is running, the airflow passes evenly through the gradient high-voltage electrostatic field under the guidance of the guide ribs, and fine dust is captured after being charged in the low-voltage region, while light tar droplets are fully charged and adsorbed onto the plates in the medium-high voltage region as the flow rate decreases.

[0112] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0113] The flow rate control system adjusts the flow rate of the primary purified gas in the integrated high-voltage electrostatic purifier through a variable frequency fan. The residence time of the primary purified gas is determined by matching the flow rate with the internal cavity volume of the purifier. The internal cavity of the purifier has a cylindrical structure and the inner wall of the cavity is equipped with flow guiding ribs. The cavity volume is designed according to the gas processing capacity to meet the requirement of stable flow of primary purified gas through the gradient high-voltage electrostatic field.

[0114] Specifically, the variable frequency fan achieves speed regulation through a matching variable frequency control unit, enabling continuous adjustment of the flow rate. The internal cavity of the purifier is made of stainless steel, and the cavity size is designed according to the requirements of the gas processing volume and residence time. Multiple sets of spiral guide ribs are evenly arranged along the axial direction on the inner wall, and the height of the ribs is set according to the requirements of the airflow segmentation. The cavity volume is determined by the product of the gas volume processed per unit time and the target residence time, ensuring that the residence time of the primary purified gas in the purifier meets the requirements for charging and capture.

[0115] Furthermore, the speed of the variable frequency fan is dynamically adjusted by the central intelligent processing unit based on real-time gas composition data. For example, when an increase in the light tar content in the primary purified gas is detected, the system will appropriately reduce the fan speed and extend the gas residence time to improve the capture efficiency; conversely, when the light tar content is low, the fan speed can be appropriately increased to increase the gas throughput.

[0116] Therefore, by precisely controlling the flow state of the primary purified gas within the high-voltage electrostatic purifier, the proposed solution can achieve efficient purification of gases under different operating conditions.

[0117] Through the above technical solution, this application enables precise and controllable flow rate of the primary purified gas within an integrated high-voltage electrostatic purifier, ensuring sufficient charging and collection time for the gas in the gradient high-voltage electrostatic field. Simultaneously, the rationally designed cylindrical cavity structure and guide ribs optimize the gas flow path, improving purification efficiency. Furthermore, a dynamic adjustment mechanism based on real-time gas composition data allows the system to quickly respond to changes in operating conditions, maintaining optimal purification performance. This intelligent flow rate control method significantly enhances the adaptability and stability of the high-voltage electrostatic purification process, effectively solving the problem of unstable efficiency in traditional electrostatic dust removal technology when dealing with complex and variable biomass gasification exhaust gases.

[0118] In some of the solutions described above in this application, the screw extrusion separator has the problem of low separation efficiency in the process of concentrating mixtures. The screw propulsion component is prone to structural failure due to material wear during long-term operation. At the same time, it is difficult to achieve efficient phase separation between solid carbon dust and liquid tar, resulting in insufficient product purity.

[0119] This application further proposes that the spiral extrusion separation device includes a spiral propulsion assembly and a filtration separation assembly. The spiral blades of the spiral propulsion assembly are made of wear-resistant stainless steel, and the blade pitch gradually decreases along the conveying direction of the concentrated mixture. The filtration separation assembly is located at the end of the device and is a sintered metal filter screen with a pore size smaller than the particle size of the solid carbon-containing dust. The concentrated mixture moves towards the end under the propulsion of the spiral propulsion assembly and is subjected to continuous extrusion.

[0120] The spiral propulsion assembly is made of wear-resistant stainless steel, which can resist the abrasive effect of the tar and dust mixture. The spiral blade pitch decreases along the conveying direction, so that the material is gradually compressed during the propulsion process. The sintered metal filter screen is set at the end, and its pore size is determined based on the particle size distribution range of solid carbon dust to ensure that only liquid tar is allowed to pass through. The heat-conducting medium heating jacket set on the outside of the device regulates the temperature through a circulating pump to maintain the material flowability.

[0121] Specifically, after the concentrated mixture enters the screw extrusion separator, the screw propulsion assembly pushes the material towards the end through rotational motion. As the screw pitch gradually decreases, the axial pressure on the material gradually increases during the conveying process, achieving preliminary compression and separation of solid carbon dust and liquid tar. The wear-resistant stainless steel material can prevent structural deformation of the screw blades due to long-term friction, extending the service life of the equipment. When the material reaches the end, the sintered metal filter screen, based on the pore size screening effect, only allows liquid tar to flow out through the filter screen pores, while solid carbon dust is trapped because its particle size is larger than the filter screen pore size. The continuous extrusion action further promotes the discharge of liquid tar from the gaps between solid particles, ultimately achieving efficient separation of the two phases.

[0122] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0123] The spiral extrusion separation device is equipped with a spiral propulsion assembly and a filtration separation assembly. The spiral blades of the spiral propulsion assembly are made of wear-resistant stainless steel, and the blade pitch gradually decreases along the conveying direction of the concentrated mixture. The filtration separation assembly is located at the end of the device and is composed of a sintered metal filter screen. The pore size of the filter screen is smaller than the particle size of the solid carbon-containing dust. The concentrated mixture moves towards the end under the propulsion of the spiral propulsion assembly and is subjected to continuous extrusion.

[0124] Specifically, the spiral blades are made of wear-resistant stainless steel, which has good wear resistance and corrosion resistance; the blade pitch gradually decreases from the initial propulsion size at the inlet to the high-pressure extrusion size at the outlet, forming a pressure gradient; the sintered metal filter screen adopts a multi-layer structure, and the pore size is set to be smaller than the average particle size of solid carbon-containing dust; during the spiral propulsion process, the concentrated mixture is concentrated, and the liquid tar flows out through the filter screen pores, while the solid dust is trapped on the filter screen surface.

[0125] Through the above technical solution, this application achieves efficient separation of concentrated mixtures; the wear resistance of the spiral blades ensures long-term stable operation, and the gradual reduction of the screw pitch provides continuous extrusion pressure, promoting liquid-solid separation; the precise pore size control of the sintered metal filter screen ensures complete retention of solid dust. Thus, liquid tar products and solid carbonaceous dust are efficiently separated, laying the foundation for subsequent resource utilization; furthermore, this solution avoids the secondary pollution problem of traditional separation methods and improves the recovery rate of tar and dust.

[0126] In some of the above-mentioned solutions of this application, when the screw extrusion separator processes the concentrated mixture, the mixture of tar and dust exhibits different fluidity at different temperatures. If the temperature is not properly controlled, the tar viscosity will be too high, which will increase the extrusion resistance and affect the separation efficiency. At the same time, low temperature may cause tar condensation, resulting in blockage inside the equipment.

[0127] This application further proposes that the spiral extrusion separation device is provided with a heat-conducting medium heating jacket on the outside, which covers the entire side wall of the device cavity; the heat-conducting medium heating jacket is driven by a circulating pump to flow the heat-conducting medium, thereby achieving temperature control of the concentrated mixture inside the device, and the temperature control is achieved by adjusting the circulation rate of the heat-conducting medium.

[0128] The heat-conducting medium heating jacket covers the entire surface of the cavity sidewall, ensuring that heat is evenly transferred to the inside of the device; the circulating pump changes the heat exchange rate in the jacket by adjusting the flow rate of the heat-conducting medium, thereby adjusting the temperature of the concentrated mixture; the correlation between the circulation rate of the heat-conducting medium and the temperature control is achieved through a preset flow rate-temperature correspondence.

[0129] Specifically, the heat-conducting medium heating jacket adopts an annular jacket structure, with the jacket filled with a high-temperature heat-conducting medium. A circulating pump drives the heat-conducting medium to circulate within the jacket. When the concentrated mixture enters the screw extrusion separator, the heat-conducting medium transfers heat to the mixture through the jacket wall, reducing the tar viscosity. When the circulation rate increases, the residence time of the heat-conducting medium shortens, and the overall temperature of the jacket decreases; conversely, the temperature increases.

[0130] For example, when the tar viscosity is too high, the circulation rate can be reduced to increase the jacket temperature to a range suitable for tar flow, thereby enhancing tar fluidity and reducing compression resistance. When the dust content is high, the circulation rate can be increased to control the temperature within a range suitable for dust separation, preventing excessive softening of the tar that could lead to dust encapsulation. Thus, by dynamically adjusting the circulation rate of the heat transfer medium, a precise match between the temperature of the concentrated mixture and the separation efficiency can be achieved, ensuring the effective separation of liquid tar and solid dust.

[0131] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0132] The spiral extrusion separator is encased in an annular jacket structure, with a closed heat-conducting medium flow channel formed inside the jacket. Heat-conducting medium inlets and outlets are located at the top and bottom of the jacket, respectively. An external circulation pump drives the heat-conducting medium to circulate within the jacket. The heat-conducting medium heating system uses a closed-loop circulation pipeline, and the speed of the circulation pump is adjusted by a variable frequency motor, thereby controlling the circulation rate of the heat-conducting medium within the jacket. During operation, as the concentrated mixture moves towards the end under the extrusion of the spiral propulsion assembly, the temperature of the heat-conducting medium is controlled within a range suitable for tar flow and dust separation. The specific temperature value is dynamically adjusted based on the viscosity characteristics of the concentrated mixture. When a decrease in the fluidity of the mixture is detected, the circulation pump speed automatically increases to increase the circulation rate of the heat-conducting medium and maintain temperature uniformity within the jacket.

[0133] Through the above technical solution, this application achieves precise temperature control of the concentrated mixture inside the spiral extrusion separator; the heat-conducting medium jacket ensures uniform temperature distribution on the side wall of the device through a fully enclosed structure, avoiding the decrease in phase separation efficiency caused by local overheating or cooling; the dynamic adjustment of the heat-conducting medium circulation rate can quickly respond to changes in the state of the mixture, maintain the fluidity of tar at a suitable temperature, and prevent solid carbonaceous dust and tar from sticking and clogging due to temperature fluctuations; this solution effectively improves the separation efficiency of liquid tar and solid dust, while avoiding the heat loss of traditional external heating methods, providing raw materials with stable physical properties for subsequent composite fuel preparation.

[0134] In some of the above-mentioned solutions of this application, when the screw extrusion separator is used to mechanically extrude and concentrate the mixture, the viscosity of the liquid tar may increase due to the decrease in temperature, which affects the separation efficiency of solid carbon dust and liquid tar. At the same time, the low temperature environment is prone to cause tar to condense on the surface of the filter screen, increasing the filtration resistance and leading to an increase in energy consumption in the separation process.

[0135] This application further proposes that the spiral extrusion separation device is provided with a heat-conducting medium heating jacket on the outside, which covers the entire side wall of the device cavity; the heat-conducting medium heating jacket is driven by a circulating pump to flow the heat-conducting medium, thereby achieving temperature control of the concentrated mixture inside the device, and the temperature control is achieved by adjusting the circulation rate of the heat-conducting medium.

[0136] The heat transfer medium heating jacket adopts a fully enclosed structure, covering the axial and circumferential areas of the device cavity sidewalls to ensure uniform heat transfer to the internal concentrated mixture. The circulating pump and the heat transfer medium heating jacket form a closed loop. By adjusting the pump speed, the flow rate of the heat transfer medium is changed. The change in flow rate directly affects the residence time of the heat transfer medium in the jacket, thereby adjusting the heating power. Temperature control is based on a preset target temperature range. The circulating pump speed is dynamically adjusted by monitoring the temperature feedback signal of the concentrated mixture in real time.

[0137] Specifically, multiple temperature sensors are installed inside the heating jacket of the heat-conducting medium. The sensors are distributed at intervals along the axial direction of the cavity to collect temperature data of different areas in real time and transmit it to the control unit. The control unit generates a circulating pump speed adjustment command based on the deviation between the temperature data and the preset target value. The command adjusts the speed of the circulating pump motor through the frequency converter. When the flow rate of the heat-conducting medium increases, the flow rate through the heating jacket per unit time increases, the heat transfer efficiency is improved, and the internal temperature of the device rises accordingly. When the flow rate decreases, the residence time of the heat-conducting medium in the jacket is extended, and the heat absorption is more complete, which is suitable for maintaining a stable temperature.

[0138] For example, when the temperature of the concentrated mixture is below the range suitable for tar flow, the circulation pump speed is increased to the suitable range, and the flow rate of the heat transfer medium reaches the suitable rate, causing the internal temperature of the device to rise rapidly to the suitable range. Once the temperature reaches the target range, the circulation pump speed is reduced to the suitable range, and the flow rate is adjusted to the suitable rate, maintaining temperature fluctuations within the allowable range. By precisely controlling the temperature, the liquid tar is kept at a low viscosity, improving the phase separation efficiency between solid carbonaceous dust and liquid tar, while preventing tar from condensing and clogging the filter screen.

[0139] As a preferred embodiment, the solution of this application is specifically implemented as follows:

[0140] Solid carbonaceous dust and liquid tar products are fed into the mixing chamber of the intelligent granulator at a preset mass ratio. This ratio is determined through combustion testing to ensure that the fuel rods meet the target calorific value and ash content control requirements. After being uniformly dispersed by a twin-shaft agitator, the mixture enters the molding section. The molding die is a cylindrical die hole adapted to the target combustion equipment, and the inner surface of the die hole is treated to enhance wear resistance.

[0141] The material is formed through the die hole under appropriate molding pressure. The formed fuel rods enter the hot air circulation drying chamber. The drying temperature is controlled within the appropriate range of moisture removal. The hot air flow rate is kept at an appropriate rate. The preset drying time is continuously processed to reduce the moisture content of the fuel rods to a range that meets storage requirements. The replaceable mold is connected to the main body of the pelletizer through a quick-release structure. When different combustion nozzles need to be adapted, the corresponding mold components can be quickly replaced.

[0142] Through the above technical solutions, this application achieves precise matching between the physical properties of fuel rods and combustion equipment, effectively solving the technical problems of the single form and poor combustion adaptability of traditional recycled products. Precise control of preset ratios ensures fuel calorific value while suppressing the risk of excessive ash content. The modular mold design allows the production line to quickly respond to the size requirements of different combustion equipment, significantly expanding the application range of recycled products. The hot air circulation drying process reduces energy consumption while ensuring the structural stability of the fuel rods, preventing breakage during transportation and storage.

[0143] Furthermore, the resource recovery system based on the simultaneous purification of tar and dust in biomass gasification tail gas provided by the present invention will be described below. The resource recovery system based on the simultaneous purification of tar and dust in biomass gasification tail gas described below can be referred to in correspondence with the resource recovery method based on the simultaneous purification of tar and dust in biomass gasification tail gas described above.

[0144] Optional, refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of the resource recovery system based on the simultaneous purification of tar and dust in biomass gasification tail gas provided by the present invention. The resource recovery system based on the simultaneous purification of tar and dust in biomass gasification tail gas includes...

[0145] The data acquisition and processing module 210 is used to acquire raw tail gas temperature, pressure and multi-component concentration data through a multi-sensor array at the gasifier outlet. The multi-sensor array includes temperature, pressure and gas component detection elements. The data is transmitted to the central intelligent processing unit via an industrial Ethernet wired link. The central intelligent processing unit processes the data to obtain a first set of real-time optimized operating parameters and a second set of real-time optimized operating parameters.

[0146] Catalytic cracking reaction module 220 is used to introduce high-temperature raw tail gas into a catalytic cracking reactor containing a conventional catalyst known in the art that is adapted to high-temperature heavy tar cracking. The reactor is equipped with multiple catalyst beds. The first set of real-time optimized operating parameters is applied to the temperature control system and the feeding system. The temperature control system uses a heat exchanger, and the feeding system uses a flow regulating valve. Primary purified gas is obtained through catalytic cracking reaction.

[0147] The high-voltage electrostatic purification module 230 is used to send the primary purified gas into the integrated high-voltage electrostatic purifier. The purifier has alternating arrangement of barbed cathodes and flat anodes. The internal cavity of the purifier has a straight cylindrical structure and the inner wall of the cavity is provided with flow guiding ribs. The second set of real-time optimized operating parameters is applied to the voltage control system and the flow control system. The voltage control system includes a voltage regulating module, and the flow control system uses a variable frequency fan. Light tar droplets and fine dust particles are captured by the high-voltage electrostatic field to obtain clean synthesis gas and concentrated mixture.

[0148] The extrusion separation module 240 is used to feed the concentrated mixture into the screw extrusion separation device. The device contains a screw propulsion assembly and a sintered metal filter screen. The blades of the screw propulsion assembly are made of wear-resistant stainless steel. The pore size of the filter screen is smaller than the particle size of the solid carbon-containing dust. The device is equipped with a heat-conducting medium heating jacket on the outside and the temperature is adjusted by the circulation rate of the heat-conducting medium. Liquid tar products and solid carbon-containing dust are obtained through mechanical extrusion operation and phase separation operation.

[0149] The composite fuel preparation module 250 is used to mix solid carbon-containing dust with a portion of liquid tar products in a preset ratio. The preset ratio is determined by prior combustion performance testing. The module then uses an intelligent granulator with replaceable molding dies to prepare cylindrical composite fuel rods that meet industrial combustion requirements. The die hole size of the replaceable molding die is adapted to the nozzle size of different combustion equipment. The granulator is equipped with a drying component that uses hot air circulation heating.

[0150] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A resource recovery method for simultaneous purification of tar and dust in biomass gasification tail gas, characterized in that, Includes the following steps: S1, the temperature, pressure and multi-component concentration data of the raw exhaust gas are collected in real time by a multi-sensor array deployed at the gasifier outlet. The data is transmitted to the central intelligent processing unit via an industrial Ethernet wired link. The central intelligent processing unit processes the real-time collected data to obtain a first set of real-time optimized operating parameters and a second set of real-time optimized operating parameters. S2, the high-temperature raw exhaust gas from the gasifier is introduced into a catalytic cracking reactor equipped with a conventional catalyst known in the art that is suitable for high-temperature heavy tar cracking. At the same time, the first set of real-time optimized operating parameters is applied to the temperature control system and feed system of the catalytic cracking reactor. Through the catalytic cracking reaction, the heavy tar in the exhaust gas is deeply converted into combustible gas rich in hydrogen and carbon monoxide, and a primary purified gas with heavy tar removed and temperature increased is obtained. S3, the primary purified gas is sent into the integrated high-voltage electrostatic purifier, and the second set of real-time optimized operating parameters is applied to the voltage control system and flow rate control system of the integrated high-voltage electrostatic purifier. Through the synergistic effect of the high-voltage electrostatic field, the light tar droplets and fine dust particles remaining in the primary purified gas are charged and captured respectively, and clean synthesis gas with most of the light tar and fine dust removed is obtained, as well as a concentrated mixture rich in hydrocarbons. S4, the concentrated mixture is continuously fed to a screw extrusion separator, and through mechanical extrusion and phase separation operations, liquid tar product and solid carbon-containing dust are obtained; S5, the solid carbon-containing dust and a portion of the liquid tar product are mixed in a preset ratio and prepared into cylindrical composite fuel rods suitable for industrial combustion requirements by an intelligent granulator, ultimately realizing the synergistic resource recovery of tar and dust.

2. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S1, a multi-sensor array is set with multiple sets of collection points at intervals along the tail gas delivery path of the gasifier outlet. Each set of points includes a temperature sensor, a pressure sensor, and a gas component sensor. The gas component sensor is used to detect the concentration of tar components, dust particles, and combustible gas components in the raw tail gas. The central intelligent processing unit performs dynamic analysis and parameter matching on the collected multi-dimensional data to obtain a first set of real-time optimized operating parameters and a second set of real-time optimized operating parameters adapted to the subsequent catalytic cracking and electrostatic purification units.

3. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S2, a multi-layer catalyst bed is set in the catalytic cracking reactor. The catalyst bed is arranged in layers along the tail gas flow direction, and the porosity of adjacent catalyst bed layers gradually decreases along the tail gas flow direction. Conventional catalysts adapted to high-temperature heavy tar cracking, which are known in the art, are filled in each bed layer. Through catalytic cracking reaction, the long-chain hydrocarbons in heavy tar are broken into small-molecule combustible gases.

4. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S2, the temperature control system uses a heat exchanger to adjust the reaction temperature inside the catalytic cracking reactor. The heat exchanger achieves heat transfer through a circulating heat transfer medium. The feeding system controls the feed rate of the high-temperature raw tail gas into the catalytic cracking reactor through a flow regulating valve. The temperature control system and the feeding system are coordinated and adjusted according to the first set of real-time optimized operating parameters.

5. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S3, barbed cathodes and flat anodes are alternately arranged inside the integrated high-voltage electrostatic purifier; the voltage control system adjusts the voltage difference between the cathode and anode through the voltage regulation module to form a gradient high-voltage electrostatic field with the voltage gradually increasing along the exhaust gas flow direction; after the primary purified gas enters the purifier, the fine dust particles are first charged in the low-voltage area at the inlet, and the light tar droplets flow with the airflow to the high-voltage area in the middle and rear sections to be charged.

6. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S3, the flow rate control system adjusts the flow rate of the primary purified gas in the integrated high-voltage electrostatic purifier through a variable frequency fan; the residence time of the primary purified gas is determined by matching the flow rate with the internal cavity volume of the purifier. The internal cavity of the purifier has a cylindrical structure and the inner wall of the cavity is provided with flow guiding ribs. The cavity volume is designed according to the gas processing capacity to meet the requirement of the primary purified gas flowing stably through the gradient high-voltage electrostatic field.

7. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S4, the screw extrusion separation device is equipped with a screw propulsion assembly and a filter separation assembly. The screw blades of the screw propulsion assembly are made of wear-resistant stainless steel, and the screw pitch of the blades gradually decreases along the conveying direction of the concentrated mixture. The filter separation assembly is located at the end of the device and is a sintered metal filter screen. The pore size of the filter screen is smaller than the particle size of the solid carbon-containing dust. The concentrated mixture moves towards the end under the push of the screw propulsion assembly and is subjected to continuous extrusion.

8. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S4, a heat-conducting medium heating jacket is provided on the outside of the spiral extrusion separation device, and the heat-conducting medium heating jacket covers the entire side wall of the device cavity; The heat transfer medium heating jacket is driven by a circulating pump to flow the heat transfer medium, thereby achieving temperature control of the concentrated mixture inside the device. The temperature control is achieved by adjusting the circulation rate of the heat transfer medium.

9. The resource recovery method based on simultaneous purification of tar and dust in biomass gasification tail gas according to claim 1, characterized in that, In step S5, the preset ratio of solid carbonaceous dust to liquid tar product is determined according to the calorific value, mechanical strength and ash content control requirements of the composite fuel rod. The specific ratio is verified through preliminary combustion performance testing. The intelligent granulator is equipped with a replaceable molding die. The die hole shape of the molding die is cylindrical. The particle size of the cylindrical composite fuel rod is determined according to the nozzle size of the combustion equipment. The intelligent granulator is equipped with a drying component with hot air circulation heating to remove moisture from the prepared composite fuel rod.

10. A resource recovery system based on the simultaneous purification of tar and dust in biomass gasification tail gas, implementing the method of any one of claims 1-9, characterized in that, Includes the following modules: The data acquisition and processing module is used to collect the temperature, pressure and multi-component concentration data of the raw exhaust gas in real time through a multi-sensor array deployed at the gasifier outlet, and transmit the data to the central intelligent processing unit through an industrial Ethernet wired link. The central intelligent processing unit processes the real-time acquired data to obtain a first set of real-time optimized operating parameters and a second set of real-time optimized operating parameters. The catalytic cracking reaction module is used to introduce the high-temperature raw tail gas from the gasifier into a catalytic cracking reactor equipped with a conventional catalyst known in the art that is suitable for high-temperature heavy tar cracking. At the same time, the first set of real-time optimized operating parameters is applied to the temperature control system and feed system of the catalytic cracking reactor. Through the catalytic cracking reaction, the heavy tar in the tail gas is deeply converted into combustible gas rich in hydrogen and carbon monoxide, and a primary purified gas with heavy tar removed and temperature increased is obtained. The high-voltage electrostatic purification module is used to send the primary purified gas into the integrated high-voltage electrostatic purifier. At the same time, the second set of real-time optimized operating parameters is applied to the voltage control system and flow rate control system of the integrated high-voltage electrostatic purifier. Through the synergistic effect of the high-voltage electrostatic field, the light tar droplets and fine dust particles remaining in the primary purified gas are charged and captured respectively, and clean synthesis gas with most of the light tar and fine dust removed is obtained, as well as a concentrated mixture rich in hydrocarbons. The extrusion separation module is used to continuously convey the concentrated mixture to the screw extrusion separation device, and obtain liquid tar product and solid carbon-containing dust through mechanical extrusion operation and phase separation operation; The composite fuel preparation module is used to mix the solid carbon-containing dust with a portion of the liquid tar product in a preset ratio, and then use an intelligent granulator to prepare cylindrical composite fuel rods that meet industrial combustion requirements, ultimately achieving the synergistic resource recovery of tar and dust.

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