Flue gas pollutant near-zero emission full-dry treatment system based on ultra-clean electric precipitation

Abstract

The utility model provides a smoke pollutant near-zero-emission full-dry-method treatment system based on ultra-clean electric precipitation. The smoke pollutant near-zero-emission full-dry-method treatment system is composed of a smoke system, an activated carbon system and a desulfurization byproduct preparation system. The flue gas system comprises a flue system, an ultra-clean electric precipitation system, a heat exchange system and a nitrogen oxide circulating system; the activated carbon system comprises a desulfurization and denitrification system, an activated carbon desorption and regeneration system and an activated carbon transportation system. The flue gas is subjected to dust removal, desulfurization, denitration and other processes, so that near-zero emission of pollutants is achieved, and no secondary pollution is generated after the whole flue gas treatment process is finished; the desorbed desulfurization by-product can be prepared into commercial salt or sulfuric acid for sale according to requirements, and the desorbed nitric oxide returns to the hearth to inhibit the generation of new nitric oxide. The system integrates various flue gas pollutant treatment technologies such as ultra-clean electric precipitation, activated carbon low-temperature adsorption desulfurization and denitrification, activated carbon desorption regeneration and nitrogen oxide furnace returning, the flue gas pollutant treatment efficiency is improved, meanwhile, secondary pollutants are thoroughly eliminated, and full-dry-method near-zero emission of flue gas pollutants is achieved.

Description

Technical Field

[0001] This utility model relates to a flue gas pollutant treatment system, and more particularly to a near-zero emission dry flue gas pollutant treatment system based on ultra-clean electrostatic precipitator. Background Technology

[0002] In today's field of coal-fired flue gas treatment, mainstream systems typically combine multiple technologies, including selective catalytic reduction (SCR) denitrification, electrostatic precipitators, wet desulfurization, and wet electrostatic precipitators. While this integrated system can effectively reduce pollutant emissions to some extent, its complex and large structure leads to high initial investment and construction costs. Furthermore, the flue gas treatment process inevitably generates a large amount of waste, such as spent denitrification catalysts and desulfurization wastewater, which cause serious environmental pollution. Treating these wastes not only requires additional economic costs but also carries the risk of secondary pollution.

[0003] When the efficiency of electrostatic precipitators decreases, it affects the quality of desulfurized gypsum, thus impacting its value as a building material. While zero-discharge processes for desulfurization wastewater reduce emissions to some extent, the use of flue gas evaporation technology may adversely affect the quality of fly ash, as the evaporation process could increase the concentration of harmful substances in the fly ash. Furthermore, wet electrostatic precipitators also generate a certain amount of ash water during operation, which requires further treatment to meet emission standards, increasing the complexity and cost of treatment.

[0004] In summary, while existing flue gas treatment systems for coal-fired boilers have made some technological progress, they still face numerous challenges in terms of economy and environment. Therefore, it is particularly necessary to research and develop new flue gas treatment systems that are more efficient, economical, and environmentally friendly. Summary of the Invention

[0005] The purpose of this invention is to solve a series of problems existing in the flue gas treatment system of coal-fired boilers, including construction and operation costs, waste disposal during operation, and secondary pollution during operation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A near-zero emission dry flue gas pollutant treatment system based on ultra-clean electrostatic precipitator (ESP) comprises a flue gas system, an activated carbon system, and a desulfurization byproduct preparation system. The flue gas system includes a flue system, an ESP system, a heat exchange system, and a nitrogen oxide (NOx) circulation system. The activated carbon system includes an activated carbon desulfurization and denitrification system, an activated carbon desorption and regeneration system, an activated carbon storage silo, and an activated carbon transportation system. The near-zero emission dry flue gas pollutant treatment system based on ESP is located at the boiler flue gas outlet. The flue gas passes sequentially through the ESP system, heat exchange system, and activated carbon desulfurization and denitrification system. The desulfurization and denitrification system discharges purified flue gas through a chimney. The activated carbon desulfurization and denitrification system, activated carbon desorption and regeneration system, and activated carbon storage silo are connected by an activated carbon transportation system, realizing the recycling of activated carbon adsorption, desorption, and regeneration. Deactivated or broken activated carbon is sent to the boiler for combustion. Nitrogen oxides in the activated carbon desorption products are sent to the boiler furnace through pipelines, and sulfur oxides in the desorption products are sent to the desulfurization by-product preparation system through pipelines. This system adopts an integrated distributed control system to connect the various systems in series, and monitors and optimizes the parameters of each unit in real time to ensure stable and efficient operation of the system.

[0008] In the aforementioned near-zero emission dry flue gas pollutant treatment system based on ultra-clean electrostatic precipitators, coal-fired flue gas enters the ultra-clean electrostatic precipitator system from the boiler outlet. After passing through an airflow equalization device, it enters the electrostatic precipitator, where most of the dust in the flue gas is adsorbed, achieving highly efficient dust removal. The outlet dust concentration is 10 mg / m³. 3Following this, the flue gas passes through a heat exchange system, lowering its temperature to below 20°C before entering the activated carbon desulfurization and denitrification system. The flue gas enters the desulfurization section's cross-flow adsorption tower from the side, where the activated carbon layer is arranged vertically. Sulfur dioxide is adsorbed by the activated carbon as the flue gas passes through the adsorption layer. Then, the flue gas enters the denitrification section's counter-flow adsorption tower, where the activated carbon layer is arranged horizontally. The flue gas passes through the activated carbon layer from bottom to top, achieving denitrification. Finally, the flue gas is discharged into the atmosphere through a chimney, completing the coal-fired flue gas treatment process. Simultaneously, the desulfurization and denitrification activated carbon, after adsorption saturation, are sent by the activated carbon circulation system to different desorption workshops in the activated carbon desorption and regeneration system. Under a nitrogen atmosphere, the activated carbon is heated, causing the adsorbed sulfur dioxide or nitrogen oxides to desorb. The activated carbon is then used for further desorption and regeneration. The activated carbon undergoes cooling and activity assessment. The regenerated activated carbon is then returned to the corresponding adsorption section of the adsorption tower according to its type. Deactivated activated carbon is sent to the boiler for combustion. The enriched sulfur dioxide enters the by-product preparation system via pipeline, where it undergoes purification, conversion, and drying processes to produce industrial salt or sulfuric acid, achieving resource utilization. The desorbed nitrogen oxides enter the nitrogen oxide circulation system via pipeline, and then enter the furnace via a conveying pipeline to participate in the thermal nitrogen oxide generation reaction, causing the reaction equilibrium to shift in the reverse direction and inhibiting the generation of thermal nitrogen oxides. The remaining nitrogen oxides are then reintroduced into the overall system with the flue gas, achieving nitrogen oxide circulation within the treatment system. An integrated distributed control system monitors and optimizes the parameters of each unit in real time, ensuring stable and efficient system operation.

[0009] As a further improvement to this application, an arc-shaped baffle is added in front of the inlet flue box of the ultra-clean electrostatic precipitator system, and a new type of turbulent flue gas guiding device is added inside the inlet flue box, which greatly improves the airflow uniformity and effectively enhances the dust removal efficiency of the first electric field; a rotating dust collecting plate is added to the terminal electric field, which slowly circulates to intercept a small amount of escaping dust and secondary dust generated by vibration, effectively reducing the dust concentration in the outlet flue gas, replacing the trough-shaped plate of the outlet flue box, and using bottom brush cleaning to reduce secondary dust generation, effectively reducing the dust concentration in the outlet flue gas; the dust concentration in the outlet flue gas of the ultra-clean electrostatic precipitator system can reach 10mg / m³. 3 This significantly reduces the risk of activated carbon pores being clogged by dust, meeting the needs of subsequent activated carbon adsorption for desulfurization and denitrification.

[0010] As a further improvement of this application, a heat exchange system is located after the ultra-clean electrostatic precipitator system and mainly consists of heat exchange tubes. The heat exchange system reduces the temperature of the flue gas at the outlet of the ultra-clean electrostatic precipitator to below 20°C to meet the needs of subsequent flue gas desulfurization and denitrification. The heat of the flue gas at the outlet of the ultra-clean electrostatic precipitator is collected and used in the activated carbon desorption and regeneration system through the heat exchange tubes to achieve efficient energy utilization.

[0011] As a further improvement to this application, it is necessary to install an ultra-clean electrostatic precipitator and a heat exchange system before the activated carbon adsorption desulfurization and denitrification stage: the ultra-clean electrostatic precipitator reduces the dust concentration in the flue gas to 10 mg / m³. 3 The following measures significantly reduce the probability of dust clogging the pores of activated carbon, ensuring its adsorption efficiency. During heat exchange, the flue gas temperature drops below 20°C, allowing nitrogen oxides, which are normally difficult to adsorb, to be efficiently adsorbed by the activated carbon, thus achieving the removal of nitrogen oxides from the flue gas. Therefore, to achieve activated carbon adsorption for desulfurization and denitrification, it is essential to implement a pre-treatment electrostatic precipitator and a heat exchange system.

[0012] As a further improvement to this application, the activated carbon desulfurization and denitrification adsorption system is connected to a heat exchange system via a flue. After being cooled by the heat exchange system, the flue gas enters the activated carbon desulfurization and denitrification adsorption system and is discharged into the atmosphere through a chimney after desulfurization and denitrification treatment. The activated carbon desulfurization and denitrification adsorption system adopts a dual-tower design. The flue gas is introduced into the adsorption towers in two separate paths from the main pipeline. The adsorption towers have a multi-layered structure, allowing for multiple activated carbon adsorption layers to achieve step-by-step adsorption and removal of sulfur dioxide and nitrogen oxides from the flue gas. Each adsorption tower uses a combination of cross-flow and counter-flow methods. The desulfurization section uses a cross-flow method, with the activated carbon moving perpendicular to the flue gas direction. The flue gas enters the activated carbon adsorption tower laterally, ensuring adsorption efficiency while reducing resistance. The nitrification section adopts a counter-current flow design, with the activated carbon moving in the opposite direction to the flue gas flow. The flue gas enters the activated carbon adsorption tower from bottom to top, improving the adsorption efficiency of nitrogen oxides. The activated carbon used in the desulfurization and denitrification sections differs; the activated carbon used in the denitrification section has higher porosity and specific surface area, achieving efficient pollutant removal while saving costs. The activated carbon layers in both the desulfurization and denitrification sections are equipped with corresponding activated carbon circulation equipment, such as conveyor belts, to flexibly transport the two different types of activated carbon. The activated carbon desulfurization and denitrification adsorption system is equipped with an intelligent control system that can monitor parameters during the flue gas treatment process in real time, accurately control the remaining adsorption capacity and circulation speed of the activated carbon, and achieve automated replacement of saturated activated carbon.

[0013] As a further improvement to this application, the activated carbon desorption and regeneration system is connected to the activated carbon desulfurization and denitrification adsorption system and the boiler through the activated carbon circulation system; the system adopts a horizontal segmented design and a two-stage cooling system, mainly composed of a feed shell, a distribution shell, a preheating section heat exchanger, a heating section heat exchanger, a primary cooling section heat exchanger, a secondary cooling section heat exchanger, a connecting shell, and a smoke box; the preheating section heat exchanger, the heating section heat exchanger, the primary cooling section heat exchanger, and the secondary cooling section heat exchanger are all shell and tube type; part of the heat source for the preheating section heat exchanger and the heating section heat exchanger is provided by the heat exchange system; the activated carbon desorption and regeneration system establishes two interconnected systems for different activated carbons in the denitrification and desulfurization sections. The separate desorption workshop uses nitrogen as both the carrier gas and protective gas for activated carbon, and each shell is equipped with a nitrogen charging device. During system operation, saturated activated carbon is conveyed into the desorption workshop by a conveyor belt. After being heated to 350℃-400℃, the pollutants adsorbed inside the carbon are released and collected and stored through an enrichment device. The activated carbon desorption and regeneration system is equipped with an intelligent control system that can monitor the parameters during the saturated activated carbon treatment process in real time and perform machine learning. This allows for precise control of the degree of desorption and remaining lifespan of the activated carbon, as well as intelligent sorting of the desorbed activated carbon. The regenerated activated carbon is sent to the adsorption tower, while the deactivated activated carbon is sent to the boiler for combustion, achieving zero solid waste generation throughout the entire process.

[0014] As a further improvement to this application, the combined application of an ultra-clean electrostatic precipitator system and an activated carbon adsorption desulfurization and denitrification system in flue gas treatment is highly innovative in the flue gas treatment industry. Their functions complement and promote each other, greatly improving the efficiency of flue gas treatment; the high-efficiency electrostatic precipitator can achieve a dust concentration of 10 mg / m³ at the outlet of the electrostatic precipitator. 3 The following, and has been proven through engineering practice, demonstrate that, supported by this technology, the dust concentration in the flue gas entering the adsorption tower reaches 10 mg / m³. 3 The following features significantly reduce the possibility of activated carbon blockage and effectively improve activated carbon adsorption efficiency; the activated carbon desulfurization and denitrification adsorption system adopts low-temperature adsorption denitrification technology, which can achieve efficient removal of nitrogen oxides without ammonia injection, solving the problem of ammonia escape in the denitrification process that has plagued power plants; the adsorption tower adopts a cross-flow and counter-flow arrangement, which effectively reduces resistance and effectively reduces system energy consumption.

[0015] As a further improvement of this application, the activated carbon transport system connects the activated carbon desulfurization and denitrification adsorption system, the activated carbon desorption and regeneration system, the boiler, and the activated carbon inlet. It mainly consists of a shell, a rotary valve, a conveyor belt, a vibrating screen, an activated carbon storage silo, and a discharger.

[0016] As a further improvement of this application, the operation of both the coal-fired flue gas treatment system and the activated carbon circulation system is automated for control and monitoring. It has an industrial Ethernet distributed control system, which consists of a fieldbus, PLC, human-machine interface, and host computer. It collects and provides feedback control on parameters such as temperature, pressure, flow rate, pollutant concentration, and equipment operating status of each unit in real time.

[0017] As a further improvement of this application, the by-product preparation system can utilize the desorbed sulfur dioxide to prepare industrial salt or sulfuric acid through purification, conversion, and drying processes; the nitrogen oxide circulation system is connected to the activated carbon desorption system and the boiler furnace through a conveying pipeline; after being desorbed in the activated carbon desorption system, the nitrogen oxides enter the furnace through the conveying pipeline to participate in the thermal nitrogen oxide generation reaction, causing the reaction equilibrium to shift in the reverse direction and inhibiting the generation of thermal nitrogen oxides. The remaining nitrogen oxides are then re-entered with the flue gas into the near-zero emission dry treatment system for flue gas pollutants based on ultra-clean electrostatic precipitators, realizing that nitrogen oxides only circulate within the treatment system, thereby ensuring that nitrogen oxide emissions meet the standards.

[0018] The operation process of a near-zero emission dry treatment system for flue gas pollutants based on ultra-clean electrostatic precipitator includes the following steps;

[0019] S1. The coal-fired flue gas enters the ultra-clean electrostatic precipitator system from the boiler outlet through the flue. After passing through the airflow equalization device, it enters the electrostatic precipitator, where most of the dust in the flue gas is adsorbed, achieving efficient dust removal. The outlet dust concentration is 10 mg / m³. 3 the following;

[0020] S2. After passing through the ultra-clean electrostatic precipitator, the coal-fired flue gas enters the heat exchange system, which reduces the flue gas temperature to below 20°C to meet the needs of subsequent activated carbon desulfurization and denitrification adsorption.

[0021] S3. After being cooled by the heat exchange system, the flue gas from the coal-fired combustion enters the activated carbon desulfurization and denitrification adsorption system through the flue. The flue gas enters the desulfurization section's cross-flow adsorption tower from the side, with the activated carbon layer arranged longitudinally. The sulfur dioxide in the activated carbon is adsorbed by the activated carbon when the flue gas passes through the adsorption layer. Then, the flue gas enters the denitrification section's counter-flow adsorption tower, with the activated carbon layer arranged laterally. The flue gas passes through the activated carbon layer from bottom to top, realizing flue gas denitrification. Afterward, the flue gas is discharged into the atmosphere through the chimney, completing the coal-fired flue gas treatment process.

[0022] S4. After adsorption saturation, the desulfurization activated carbon and denitrification activated carbon are sent to different desorption workshops of the activated carbon desorption and regeneration system by the activated carbon circulation system. They are heated in a nitrogen atmosphere to desorb the adsorbed sulfur dioxide or nitrogen oxides. Then the activated carbon is cooled and its activity is evaluated. Finally, the regenerated activated carbon is sent back to the corresponding adsorption section of the adsorption tower according to its type, and the deactivated activated carbon is sent to the boiler for combustion.

[0023] S5. The enriched sulfur dioxide enters the converter of the by-product preparation system through a pipeline, and is then purified, converted, dried and processed to produce industrial salt or sulfuric acid, thus realizing resource utilization.

[0024] S6. The nitrogen oxides after analysis enter the nitrogen oxide circulation system through the pipeline, and enter the furnace through the conveying pipeline to participate in the thermal nitrogen oxide generation reaction, causing the reaction equilibrium to shift in the reverse direction and inhibiting the generation of thermal nitrogen oxides. The remaining nitrogen oxides then re-enter the flue gas near-zero emission dry treatment system based on ultra-clean electrostatic precipitator with the flue gas, realizing that nitrogen oxides only circulate within the treatment system.

[0025] S7. The control system adjusts the operating parameters of each unit according to production needs and system operating conditions to improve system operating efficiency and operational stability.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. Low-temperature activated carbon adsorption technology is used to treat nitrogen oxides and sulfur dioxide in coal-fired flue gas. The entire process does not require the consumption of a large amount of water resources. The low-temperature adsorption denitrification technology eliminates the need for ammonia injection, solving the problem of ammonia escape in the denitrification process that has plagued power plants. The desorbed activated carbon can be directly used as fuel for combustion in the furnace. No waste is generated in the entire process, achieving zero emissions of pollutants.

[0028] 2. The combination of ultra-clean electrostatic precipitator technology and activated carbon low-temperature adsorption desulfurization technology in the treatment of coal-fired flue gas is highly innovative in the coal-fired flue gas treatment industry. The functions of each system are complementary and mutually reinforcing, which greatly improves the efficiency of coal-fired flue gas treatment.

[0029] 3. Ultra-clean electrostatic precipitators can achieve zero dust emissions from the outlet flue gas, and this has been proven in engineering practice. Based on this technology, the dust concentration in the flue gas entering the adsorption tower reaches 10 mg / m³. 3 The following measures significantly reduce the possibility of activated carbon clogging and effectively improve the adsorption efficiency of activated carbon.

[0030] 4. The activated carbon desulfurization and denitrification adsorption system adopts a segmented design for the desulfurization and denitrification sections. Each adsorption tower adopts a combination of counter-current and cross-current design, which improves desulfurization and denitrification efficiency while reducing system resistance and operating costs.

[0031] 5. High economic benefits: Compared with existing coal-fired flue gas treatment systems, the flue gas treatment system established based on the all-dry zero-emission technology for flue gas pollutants using ultra-clean electrostatic precipitators has lower construction and operation costs; after activated carbon desorption, by-products with high economic value such as commercial salt or sulfuric acid can be obtained according to demand, resulting in high economic benefits; the overall process does not generate additional pollutants, reducing pollutant treatment costs; and the rational allocation of high-performance activated carbon and lower-performance activated carbon according to desulfurization and denitrification requirements effectively reduces activated carbon costs. Attached Figure Description

[0032] The system will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is the overall architecture diagram of the system;

[0034] Figure 2 Diagram of an ultra-clean electrostatic precipitator system;

[0035] Figure 3 This is a graph showing the relationship between activated carbon adsorption and denitrification efficiency and temperature.

[0036] Figure 4 Diagram of a single adsorption tower in an activated carbon desulfurization and denitrification adsorption system;

[0037] Figure 5 Diagram of activated carbon desorption and regeneration system;

[0038] In the diagram: 1 - flue gas flow direction; 2 - arc-shaped baffle; 3 - turbulent flue gas guiding device; 4 - fourth electric field; 5 - rotating electrode plate; 5.1 - connecting hinge; 5.2 - modular electrode plate; 6 - porous plate; 7 - activated carbon layer; 8 - activated carbon movement direction; 9 - inlet louver; 10 - activated carbon desulfurization tower; 11 - activated carbon denitrification tower; 12 - sulfur oxide desorption gas flow direction; 13 - desorption gas enrichment pipe; 14 - activated carbon conveyor belt; 15 - desorption workshop heat exchanger; 16 - saturated adsorption sulfur oxide activated carbon; 17 - sulfur oxide desorption workshop; 18 - nitrogen oxide desorption workshop; 19 - nitrogen oxide desorption gas flow direction; 20 - saturated adsorption nitrogen oxide activated carbon. Detailed Implementation

[0039] The flue gas from the coal-fired boiler enters the ultra-clean electrostatic precipitator system through the flue duct. After passing through the airflow equalization device, it enters the electrostatic precipitator, where most of the dust in the flue gas is adsorbed, achieving highly efficient dust removal. The outlet dust concentration is 10 mg / m³. 3 the following;

[0040] The coal-fired flue gas then enters the heat exchange system after passing through the ultra-clean electrostatic precipitator system. The heat exchange system reduces the flue gas temperature to below 20°C to meet the needs of subsequent activated carbon desulfurization and denitrification adsorption.

[0041] After being cooled by the heat exchange system, the flue gas from the coal-fired combustion enters the activated carbon desulfurization and denitrification adsorption system through the flue. The flue gas enters the desulfurization section's cross-flow adsorption tower from the side, with the activated carbon layer arranged vertically. The sulfur dioxide in the activated carbon is adsorbed by the activated carbon as the flue gas passes through the adsorption layer. Then, the flue gas enters the denitrification section's counter-flow adsorption tower, with the activated carbon layer arranged horizontally. The flue gas passes through the activated carbon layer from bottom to top, achieving flue gas denitrification. Finally, the flue gas is discharged into the atmosphere through the chimney, completing the coal-fired flue gas treatment process.

[0042] After adsorption saturation, the desulfurization activated carbon and denitrification activated carbon are sent from the activated carbon circulation system to different desorption workshops of the activated carbon desorption and regeneration system. They are heated in a nitrogen atmosphere to desorb the adsorbed sulfur dioxide or nitrogen oxides. Then the activated carbon is cooled and its activity is evaluated. Finally, the regenerated activated carbon is sent back to the corresponding adsorption section of the adsorption tower according to its type, and the deactivated activated carbon is sent to the boiler for combustion.

[0043] The enriched sulfur dioxide enters the converter of the by-product preparation system through pipelines, and is then purified, converted, dried and processed to produce industrial salt or sulfuric acid, thus realizing resource utilization.

[0044] After analysis, the nitrogen oxides enter the nitrogen oxide circulation system through the pipeline, and then enter the furnace through the conveying pipeline to participate in the thermal nitrogen oxide generation reaction, causing the reaction equilibrium to shift in the reverse direction and inhibiting the generation of thermal nitrogen oxides. The remaining nitrogen oxides then re-enter the coal-fired flue gas pollutant dry zero-emission treatment system based on ultra-clean electrostatic precipitator with the flue gas, realizing that nitrogen oxides only circulate within the treatment system.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A near-zero emission dry treatment system for flue gas pollutants based on ultra-clean electrostatic precipitator, characterized in that: It consists of a flue gas system, an activated carbon system, and a desulfurization byproduct preparation system; the flue gas system includes a flue system, an ultra-clean electrostatic precipitator system, a heat exchange system, and a nitrogen oxide circulation system; the activated carbon system includes an activated carbon desulfurization and denitrification system, an activated carbon desorption and regeneration system, an activated carbon storage silo, and an activated carbon transportation system. The system is located at the boiler flue gas outlet. The flue gas passes through the flue system in sequence through the ultra-clean electrostatic precipitator system, the heat exchange system, and the activated carbon desulfurization and denitrification system, and is discharged through the chimney after purification. The activated carbon desulfurization and denitrification system, the activated carbon desorption and regeneration system, and the activated carbon storage silo are connected by an activated carbon transportation system. The activated carbon desorption and regeneration system is equipped with a desulfurization section desorption workshop and a denitrification section desorption workshop, which respectively process the adsorption-saturated desulfurization activated carbon and denitrification activated carbon. The nitrogen oxide circulation system returns the desorbed nitrogen oxides to the boiler furnace through pipelines. The desulfurization by-product preparation system receives the desorbed sulfur oxides and prepares them into industrial salt or sulfuric acid.

2. The system according to claim 1, characterized in that: The ultra-clean electrostatic precipitator system is equipped with an arc-shaped baffle plate in front of the inlet flue box, a turbulent flue gas guiding device inside the inlet flue box, and a rotating dust collecting electrode plate in the final stage electric field, with bottom brush cleaning; the dust concentration in the outlet flue gas is ≤10mg / m³. 3 .

3. The system according to claim 1, characterized in that: The heat exchange system is located after the ultra-clean electrostatic precipitator system. It consists of multiple layers of heat exchange tubes, which reduces the flue gas temperature to below 20°C and uses the absorbed heat for the activated carbon desorption and regeneration system.

4. The system according to claim 1, characterized in that: The activated carbon desulfurization and denitrification adsorption system adopts a dual-tower design. The flue gas is introduced into the adsorption towers in two separate streams from the main pipeline. The adsorption towers have a multi-layer structure and can be equipped with multiple activated carbon adsorption layers to achieve the stepwise adsorption and removal of sulfur dioxide and nitrogen oxides in the flue gas. Each adsorption tower adopts a combination of cross-flow and counter-flow design, with the desulfurization section using a cross-flow design and the denitrification section using a counter-flow design.

5. The system according to claim 1, characterized in that: The activated carbon desorption and regeneration system establishes two independent desorption workshops for different activated carbons in the denitrification and desulfurization sections. Part of the heat for heating the activated carbon desorption and regeneration system is provided by the heat exchange system. During operation, saturated activated carbon is conveyed into the desorption workshop by a conveyor belt and heated to 350℃-400℃, causing the adsorbed flue gas pollutants to be released. The activated carbon desorption and regeneration system is equipped with an intelligent control system that can monitor parameters in real time during the saturated activated carbon treatment process and perform machine learning to accurately control the degree of activated carbon desorption and remaining lifespan. It also intelligently sorts the desorbed activated carbon, sending regenerated activated carbon to the adsorption tower and deactivated activated carbon to the boiler for combustion, achieving zero solid waste generation throughout the entire process.

6. The system according to claim 1, characterized in that: It also includes an integrated distributed control system for real-time monitoring and adjustment of the operating parameters of each subsystem.

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