Zero-emission treatment system and method for cold waste gas of sintering ring

Abstract

The invention aims to provide a sintering ring cold waste gas zero emission treatment system and method, and relates to the technical field of waste gas emission in the steel industry. The system comprises a circular cooler, a waste heat boiler and a blast furnace ore tank, a waste gas outlet of the cooling section generating high-temperature waste gas is connected with a waste gas inlet of the waste heat boiler, and a waste gas outlet of the waste heat boiler is connected with air boxes below trolleys of the cooling sections generating the high-temperature waste gas, so that the high-temperature waste gas enters the waste heat boiler to be subjected to waste heat recovery and then enters the cooling sections again to be recycled. The cooling section for generating the medium and low temperature waste gas is connected with the blast furnace ore tank, and the medium and low temperature waste gas is introduced into the blast furnace ore tank to supply heat to the blast furnace ore tank. According to the sintering ring cooler waste gas zero emission system, cross-process resource collaboration is achieved, meanwhile, waste gas is completely consumed, the purpose of sintering ring cooler waste gas zero emission is achieved, other large equipment is not added, and the sintering ring cooler waste gas zero emission system has the advantages of being simple in structure and low in maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of waste gas emission technology in the steel industry, specifically to a zero-emission treatment system and method for sintering ring cold waste gas. Background Technology

[0002] Sintering is a crucial step in steel production, and also a major contributor to energy consumption and pollutant emissions. During the cooling of sintered ore in an annular cooler, a large volume of waste gas with a wide temperature range and high flow rate is generated. This waste gas carries the sensible heat of the sintered ore.

[0003] To address the issue of treating this portion of waste gas, the industry has conducted numerous research and explorations to achieve zero emissions from the sintering ring cooler. For example, Chinese invention patent application number 202411198368.3 discloses a zero-emission synergistic waste heat utilization system and method for sintering ring cooler waste gas. Although this solution achieves the circulation of waste gas within the sintering process, the system is extremely complex. It requires the construction of multi-stage (three-stage) series closed / semi-closed air ducts, the configuration of more than four dedicated circulating fans, and the precise coordinated control of multiple frequency converters and regulating valves to achieve a balance of air volume and temperature. The pipeline is complex, the control logic is cumbersome, and the investment and operation and maintenance costs are high. Chinese invention application No. 202110005621.9 discloses a zero-emission system for sintering cooling exhaust gas and a sintering cooling process. The solution reduces exhaust gas generation by setting a pre-cooling device on the falling path of hot sintered ore between the discharge end of the crusher corresponding to the sintering machine and the feed end of the annular cooler. However, this adds new equipment, increases the complexity of the system, and increases maintenance costs.

[0004] With unprecedented global demands for green and low-carbon development in the steel industry, achieving zero-emission treatment of sintering ring cooling exhaust gas has become an urgent need for technological upgrading within the industry. Therefore, a new exhaust gas treatment process is urgently needed to achieve net-zero emissions to the external environment through a simple system and process flow. Summary of the Invention

[0005] To overcome the shortcomings of the above-mentioned technologies, the purpose of this invention is to provide a zero-emission treatment system and method for sintering ring cold exhaust gas, which solves the problems of complex structure and high maintenance cost of existing sintering ring cold exhaust gas zero-emission treatment systems.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A zero-emission treatment system for sintering ring cooler exhaust gas is characterized by comprising a ring cooler, a waste heat boiler, and a blast furnace ore bin. The ring cooler includes multiple cooling sections, each generating either high-temperature exhaust gas or medium-to-low-temperature exhaust gas. The exhaust gas outlet of the cooling section generating high-temperature exhaust gas is connected to the exhaust gas inlet of the waste heat boiler via a pipeline. The exhaust gas outlet of the waste heat boiler is connected to the air boxes under the trolleys of each cooling section generating high-temperature exhaust gas via pipelines, allowing the high-temperature exhaust gas to enter the waste heat boiler for waste heat recovery and then recycle within the cooling section. The exhaust gas outlet of the cooling section generating medium-to-low-temperature exhaust gas is connected to the blast furnace ore bin, supplying heat to the blast furnace ore bin. This system integrates the sintering ring cooler, waste heat boiler, and blast furnace ore bin, constructing a complete closed loop of waste generation, recovery, and disposal, providing a fundamental system framework for achieving zero exhaust gas emissions and realizing cross-process resource synergy. In this system, high-temperature waste gas circulates in a closed loop between the annular cooler, waste heat boiler, and the annular cooler, completely eliminating the external emission of high-grade waste gas. Simultaneously, its heat energy is recovered for power generation, achieving efficient energy recovery and recycling. Utilizing low-grade waste heat in a targeted manner to replace new heat energy and achieve complete waste gas disposal is a key path to achieving zero emissions.

[0007] As a preferred embodiment, the annular cooler includes a first cooling stage, a second cooling stage, a third cooling stage, a fourth cooling stage, and a fifth cooling stage. The first and second cooling stages generate high-temperature exhaust gas, while the third, fourth, and fifth cooling stages generate medium- and low-temperature exhaust gas. The exhaust gas outlets of the first and second cooling stages are connected to the exhaust gas inlet of the waste heat boiler via pipelines. The exhaust gas outlet of the waste heat boiler is connected to the air box below the trolley of the first and second cooling stages via pipelines, allowing the high-temperature exhaust gas to enter the waste heat boiler for waste heat recovery and then recirculate back into the air box below the trolley of the first and second cooling stages. The exhaust gas outlets of the third, fourth, and fifth cooling stages are connected to the blast furnace ore bin, allowing the exhaust gas from the third, fourth, and fifth cooling stages to be introduced into the blast furnace ore bin to provide heat.

[0008] As a preferred embodiment, a circulating fan is installed between the exhaust gas outlet of the waste heat boiler and the air box below the cooling section trolley that generates high-temperature exhaust gas. The circulating fan transports the exhaust gas from the waste heat boiler, after waste heat recovery, to the air box. The circulating fan provides stable power to the closed-loop system, precisely controlling the circulating air volume and pressure to ensure a balance between waste heat recovery efficiency and the process requirements of the annular cooler.

[0009] As a preferred embodiment, a flue pipe is provided at the top of the cooling section, and a pipe valve is provided at the top of the flue pipe. The exhaust gas outlet of the cooling section is located in the middle of the flue pipe and connected to a bypass pipe. This improves the operational flexibility and maintainability of the system, facilitates the adjustment of operating conditions, equipment maintenance and emergency switching, and ensures the long-term stable operation of the system.

[0010] As a preferred embodiment, the exhaust gas inlets of the blast furnace ore bin are located in the lower middle part of the blast furnace ore bin, and there are 4 to 6 exhaust gas inlets. An exhaust gas blower pipe is installed at each exhaust gas inlet, and the nozzle of the blower pipe is angled upwards at 30 to 50 degrees. The blower pipe is equipped with a pipe valve. Setting multiple exhaust gas inlets optimizes the distribution and penetration of exhaust gas in the ore bin raw material, ensuring uniform and sufficient preheating, high thermal energy utilization, and avoiding airflow short-circuiting.

[0011] As a preferred embodiment, the blast furnace ore bin and the cooling section of the annular cooler that generates medium- and low-temperature waste gas are connected by an induced draft fan. The induced draft fan provides the necessary power to reliably transport the medium- and low-temperature waste gas to the blast furnace ore bin, overcomes pipeline resistance, and ensures unobstructed waste gas disposal path.

[0012] As a preferred embodiment, the blast furnace ore bins are provided with one or more, each used to hold various blast furnace raw materials; the blast furnace raw materials include one or more of sintered ore, pellets, lump ore, coke, and auxiliary materials.

[0013] As a preferred embodiment, the system further includes a tail gas treatment device, which is connected to the tail gas outlet of the blast furnace ore bin to treat the tail gas in the blast furnace ore bin before discharging it.

[0014] Furthermore, the exhaust gas treatment equipment includes a dust collector, a dust extraction fan, and a chimney connected in sequence; the dust collector is connected to the exhaust gas outlet of the blast furnace ore bin; the dust extraction fan extracts the exhaust gas after dust removal by the dust collector and inputs it into the chimney, where it is discharged into the atmosphere. The final exhaust gas after preheating of the blast furnace ore bin is purified to ensure that even after multiple uses, the gas ultimately discharged into the atmosphere meets ultra-low emission standards, achieving environmental friendliness.

[0015] The present invention also provides a zero-emission treatment method for sintering ring cooler exhaust gas, which is characterized in that the high-temperature exhaust gas generated by the ring cooler is introduced into a waste heat boiler for waste heat recovery and used for power generation; and the medium-low temperature exhaust gas generated by the ring cooler is blown into the blast furnace ore bin to preheat the raw materials in the blast furnace ore bin.

[0016] As a preferred embodiment, the waste gas recovered from the waste heat boiler is re-blown into the cooling section of the annular cooler to generate high-temperature waste gas for recycling; the tail gas generated after the raw materials are preheated in the blast furnace ore bin is discharged into the atmosphere after being treated to meet the standards.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a zero-emission treatment system and method for sintering ring cooler exhaust gas, which integrates a ring cooler, a waste heat boiler, and a blast furnace ore bin. It constructs a complete closed loop for the generation, recovery, and disposal of high-grade exhaust gas, as well as a system for the targeted resource utilization of low-grade waste heat. This achieves cross-process resource synergy while completely eliminating the external emission of high-grade exhaust gas, realizing the complete disposal of exhaust gas, and achieving the goal of zero emission of ring cooler exhaust gas. Moreover, it does not require the addition of other large-scale equipment and has the advantages of simple system structure and low maintenance cost.

[0018] This invention is a novel method that directly uses the waste heat from the low-temperature exhaust gas in the annular cooler for the dehydration and preheating of blast furnace raw materials, and works in conjunction with blast furnace carbon reduction. All the low-temperature exhaust gas in the annular cooler is recycled and utilized, which improves the waste heat recovery and utilization rate of the sintering process. This not only reduces production costs, but also solves the problem of fugitive emissions of exhaust gas at the back end of the annular cooler, avoids environmental impact, achieves sustainable development, and realizes zero emissions of exhaust gas from the sintering annular cooler.

[0019] This invention utilizes the waste heat from the ring cooler to preheat the blast furnace raw materials, increasing the temperature of the raw materials entering the furnace, which can reduce blast furnace energy consumption and carbon emissions; it also utilizes the waste heat from the sintering ring cooler to dehydrate the lump ore in the blast furnace raw materials, improving the screening efficiency of the lump ore under the trough, reducing the powder content, and improving the permeability of the blast furnace. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a zero-emission treatment system for sintering ring cold exhaust gas according to a specific embodiment of the present invention; In the diagram: 1. Circulating fan; 2. Cooling blower; 3. Circulating cooler; 4. Waste heat boiler; 5. First stage of exhaust gas; 6. Second stage of exhaust gas; 7. Third stage of exhaust gas; 8. Fourth stage of exhaust gas; 9. Fifth stage of exhaust gas; 10. Blast furnace ore bin; 11. Exhaust gas induced draft fan; 12. Dust collector; 13. Dust removal exhaust fan; 14. Chimney; 15. Exhaust pipe. Detailed Implementation

[0021] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, the present invention provides a zero-emission treatment system for sintering ring cooler exhaust gas, comprising a ring cooler 3, a waste heat boiler 4, and a blast furnace ore bin 10.

[0023] The annular cooler 3 includes a trolley that carries sintered ore and a wind box that provides cooling medium. The wind box is located below the trolley and provides low-temperature gas as a cooling medium to the sintered ore above the trolley. The specific structure of the annular cooler 3 is existing technology and will not be described in detail here.

[0024] The annular cooler 3 is used to cool and de-temperature the sintered ore. It includes multiple cooling sections, each generating either high-temperature or medium-to-low-temperature exhaust gas. These cooling sections are sequentially connected as Cooling Section 1, Cooling Section 2, Cooling Section 3, Cooling Section 4, and Cooling Section 5, which cool the sintered ore sequentially. Each cooling section's air box is equipped with a low-temperature gas inlet. Each cooling section has an exhaust pipe 15 at its top, which discharges exhaust gas from the cooling section through an exhaust gas outlet. The exhaust pipe 15 has a valve at its top, retaining its original external discharge function and serving as a backup in case of system malfunction. An exhaust gas outlet is opened in the middle of the exhaust pipe 15, connecting to a bypass pipe to draw out the exhaust gas from each cooling section. The bypass pipe connects to the waste heat boiler 4 or the blast furnace ore bin 10.

[0025] The annular cooler 3 is also equipped with a cooling blower 2, with one cooling blower 2 for each cooling section. The low-temperature gas inlet of the bottom air box of the cooling section is connected to the cooling blower 2 through a pipe. The low-temperature gas is blown into the air box by the cooling blower 2, thereby providing a cooling medium for each cooling section. After the low-temperature gas enters each cooling section and cools the sinter, it generates exhaust gas for each section, namely exhaust gas section 1 5, exhaust gas section 2 6, exhaust gas section 3 7, exhaust gas section 4 8, and exhaust gas section 5 9. Among them, cooling sections 1 and 2 generate high-temperature exhaust gas, that is, exhaust gas section 1 5 and exhaust gas section 2 6 are high-temperature exhaust gases, with a temperature of typically 350~450℃; cooling sections 3, 4, and 5 generate medium-low temperature exhaust gas, that is, exhaust gas section 3 7, exhaust gas section 4 8, and exhaust gas section 5 9 are medium-low temperature exhaust gases, with a temperature of typically 150~180℃.

[0026] The exhaust pipes 15 of the first and second cooling sections are connected to the waste heat boiler 4 via pipelines, allowing the high-temperature waste gas generated in the first and second cooling sections to be introduced into the waste heat boiler 4 for heating. The exhaust pipes 15 of the third, fourth, and fifth cooling sections are connected to the blast furnace ore bin 10 via pipelines, allowing the medium- and low-temperature waste gas generated in the third, fourth, and fifth cooling sections to be introduced into the blast furnace ore bin 10 for heating.

[0027] The waste heat boiler 4 is used for power generation. It is equipped with an exhaust gas inlet and an exhaust gas outlet. The exhaust gas inlet is connected to the exhaust gas outlet of the flue gas pipe 15 of the first and second cooling sections via a pipeline. The exhaust gas outlet is connected to the bottom air boxes of the first and second cooling sections via a pipeline. This allows the high-temperature exhaust gas generated in the first and second cooling sections to enter the waste heat boiler 4 through the exhaust gas inlet to heat the waste heat boiler 4. Then, it returns to the first and second cooling sections for recycling via the exhaust gas outlet of the waste heat boiler 4 and the low-temperature gas inlet of the air box, respectively. Specifically, a circulating fan 1 is installed between the exhaust gas outlet of the waste heat boiler 4 and the air box under the trolley of the first and second cooling sections. The circulating fan 1 transports the exhaust gas after waste heat recovery in the waste heat boiler 4 to the air box. The circulating fan 1 is equipped with a gas inlet and a gas outlet. The exhaust gas outlet of the waste heat boiler 4 is connected to the gas inlet of the circulating fan 1 via a pipeline. The gas outlet of the circulating fan 1 is connected to the low-temperature gas inlet of the air box of the first and second cooling sections via pipelines.

[0028] The blast furnace ore bin 10 is used to hold blast furnace raw materials and is equipped with a waste gas inlet and a tail gas outlet. The waste gas inlet is connected to the third, fourth, and fifth cooling sections. Specifically, the waste gas inlet of the blast furnace ore bin 10 is connected to the waste gas outlet of the exhaust pipe 15 of the third, fourth, and fifth cooling sections via a waste gas induced draft fan 11. The waste gas induced draft fan 11 is equipped with a waste gas inlet and a waste gas outlet. The waste gas inlet is connected to the waste gas outlet of the exhaust pipe 15 of the third, fourth, and fifth cooling sections via pipes, and the waste gas outlet is connected to the waste gas inlet of the blast furnace ore bin 10 via pipes. The waste gas inlet of the blast furnace ore bin 10 is located in the middle and lower part of the blast furnace ore bin 10. A waste gas blower pipe is installed at the waste gas inlet. There are 4 to 6 waste gas inlets, and the nozzles of the waste gas blower pipes are angled upwards at 30 to 50 degrees.

[0029] Multiple blast furnace ore bins 10 are provided, each used to hold various blast furnace raw materials, including sinter, pellets, lump ore, coke, and auxiliary materials. The exhaust gas outlets of the exhaust gas fans 11 are connected to each blast furnace ore bin 10, and each blast furnace ore bin 10 has a pipe valve installed in its exhaust gas blower pipe to regulate the exhaust gas flow rate. If the raw material contained in the blast furnace ore bin 10 is lump ore, and the moisture content of the lump ore is high during rainy weather, the blower flow rate can be increased to enhance the screening efficiency of the lump ore under the bin and reduce the powder content entering the furnace.

[0030] The system also includes tail gas treatment equipment. The tail gas outlet of the blast furnace ore bin 10 is connected to the tail gas treatment equipment through a pipeline, and the tail gas is treated and discharged after being discharged. After the medium and low temperature waste gas is introduced into the blast furnace ore bin 10, the blast furnace raw materials are heated in the blast furnace ore bin 10, and the temperature of the feed material can be increased by 50-80°C, thereby reducing the energy consumption of the blast furnace and reducing carbon emissions.

[0031] The exhaust gas treatment equipment includes a dust collector 12, a dust extraction fan 13, and a chimney 14 connected in sequence by pipes. The dust collector 12 is connected to the exhaust gas outlet of the blast furnace ore bin 10 by pipes to treat the exhaust gas after the waste heat utilization of the blast furnace ore bin 10. The dust extraction fan 13 extracts the exhaust gas after dust removal by the dust collector 12 and inputs it into the chimney 14, where it is discharged into the atmosphere.

[0032] Among them, dust collector 12 is a bag filter dust collector, and its emission standards meet ultra-low emission standards.

[0033] The above-mentioned device achieves zero emissions of sintering ring cold exhaust gas, while also realizing the complete recovery and utilization of waste heat and the organized emission of the exhaust gas after recovery and utilization.

[0034] The present invention discloses a zero-emission treatment method for sintering ring cooler waste gas, which is achieved through the above-mentioned system. The high-temperature waste gas generated by the first and second cooling stages of the ring cooler 3 is introduced into the waste heat boiler 4. After being utilized by the waste heat boiler 4, it is then blown into the air box under the trolley of the first and second cooling stages by the circulating fan 1. The medium and low temperature waste gas from the third, fourth and fifth cooling stages at the rear end of the ring cooler 3 is blown into the blast furnace ore bin 10 by the waste gas induced draft fan 11. The tail gas discharged from the top of the blast furnace ore bin 10 is discharged into the atmosphere after passing through the dust collector 12, thereby realizing the complete recovery and utilization of the waste heat of the sintering ring cooler and the organized emission of waste gas.

[0035] Specifically, the above methods include: The exhaust gas generated by the first and second cooling stages 5 and 6 enters the bypass pipe through the exhaust gas outlet in the middle of the flue pipe 15. Then, the circulating fan 1 is started, and the exhaust gas is introduced into the waste heat boiler 4 through the exhaust gas inlet of the waste heat boiler 4 for waste heat recovery and power generation. Then, the exhaust gas after waste heat recovery is blown into the air box under the first and second cooling stage trolleys by the circulating fan 1. After the circulating fan 1 is started, the cooling blower 2 of the first cooling stage air box is turned off. The exhaust gases from cooling sections three, four, and five (sections 7, 8, and 9) enter the bypass pipe through the exhaust gas outlet in the middle of the flue pipe 15. Subsequently, they are injected obliquely upwards into the blast furnace ore bin 10 through the exhaust gas inlet of the blast furnace ore bin 10 via the exhaust gas fan 11 and the exhaust gas blower pipe. This preheats the sintered ore, pellets, lump ore, coke, or auxiliary materials within the blast furnace ore bin 10. The blower volume of each bin is adjusted via pipeline valves. In the case of blast furnace ore bins containing lump ore, the air volume can be increased to enhance the screening efficiency of the lump ore under the bin and reduce the powder content entering the furnace when the moisture content of the lump ore is high during rainy days. After heating, the temperature of each raw material entering the furnace can be increased by 50-80℃, reducing the energy consumption of the blast furnace and reducing carbon emissions. The exhaust gas generated after the waste heat in the blast furnace ore bins 10 is removed by the bag filter dust collector 12 to reach the ultra-low emission standard, and then extracted by the dust removal fan 13 and discharged into the atmosphere through the chimney 14.

[0036] Example 1 A method for zero-emission treatment of sintering ring cold exhaust gas, employing the zero-emission treatment system for sintering ring cold exhaust gas of the present invention, includes the following steps: 360m 2 The high-temperature exhaust gas generated by the first and second cooling stages of the sintering machine is approximately 700,000 m³. 3 / h introduces waste heat into the boiler, the temperature of the high-temperature exhaust gas can reach 350~450℃, and the generated high-temperature steam can be used for power generation, with a power generation of 10~15kWh / ton of sinter; After heat exchange in the waste heat boiler, the temperature of the high-temperature exhaust gas drops to 140-170°C. It is then blown into the No. 2 air box under the first cooling stage trolley and the No. 5 air box under the second cooling stage trolley by the circulating fan. After the exhaust gas circulating fan is started, the cooling blower of the first cooling stage can be turned off. Close the exhaust valves on the exhaust pipes of the third, fourth, and fifth cooling sections at the rear of the annular cooler, approximately 800,000 m³. 3 The medium and low temperature exhaust gas per hour is drawn out from the bypass pipe connected to the exhaust gas outlet in the middle of the flue pipe; Low- and medium-temperature exhaust gases are blown into a 3200m³ system by an exhaust gas fan. 3 The blast furnace has 10 ore bins, with the air inlet located in the lower middle part of the bin, and 4 to 6 inlets are provided. The nozzle of the exhaust gas blower pipe is inclined upward at 30 to 45 degrees. The blast furnace ore bins include bins for sinter, pellets, lump ore, coke, and auxiliary materials. The exhaust gas blower pipes under the ore bins are equipped with regulating valves to adjust the air volume of each bin. The temperature of the blown-in exhaust gas can reach 150-180℃. The blast furnace raw materials are heated in the ore bin, and the temperature of the incoming material can be increased by 50-80℃, which affects the overall coke ratio by about 2.0 kg / ton of iron. At the same time, the furnace top temperature increases, and the TRT power generation increases. Among them, the lump ore bin can increase the air volume, especially when the lump ore has high moisture content in rainy weather, which enhances the screening efficiency of lump ore under the bin, reduces the powder content of lump ore entering the furnace by 1%, and reduces the overall coke ratio by about 1.5 kg / ton of iron. The exhaust gas temperature at the top of the ore bin drops to below 60°C. After being treated by a bag filter, it is discharged into the atmosphere through a chimney. The exhaust gas emission standard meets ultra-low emission standards, realizing the complete recovery and utilization of waste heat from the sintering ring cooler and zero exhaust gas emission.

[0037] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sintering ring cold exhaust gas zero-emission treatment system characterized by comprising: The system comprises a ring cooler, a waste heat boiler and a blast furnace tank; the ring cooler comprises multiple cooling sections, which respectively generate high-temperature waste gas or medium-low-temperature waste gas; the waste gas outlet of the cooling section generating high-temperature waste gas is connected with the waste gas inlet of the waste heat boiler, the waste gas outlet of the waste heat boiler is respectively connected with the air box below each cooling section generating high-temperature waste gas, so that the high-temperature waste gas enters the waste heat boiler for waste heat recovery and then enters the cooling section for recycling; the waste gas outlet of the cooling section generating medium-low-temperature waste gas is connected with the blast furnace tank, and the medium-low-temperature waste gas is introduced into the blast furnace tank to heat the blast furnace tank.

2. The sinter ring cold exhaust gas zero emission treatment system of claim 1, wherein, A circulating fan is arranged between the waste gas outlet of the waste heat boiler and the air box below the cooling section generating high-temperature waste gas, and the waste gas recovered in the waste heat boiler is transported into the air box by the circulating fan.

3. The sinter ring cold exhaust gas zero emission treatment system of claim 1, wherein, An exhaust pipe is arranged at the top of the cooling section, and the waste gas outlet of the cooling section is arranged in the middle of the exhaust pipe and connected with a bypass pipe.

4. The sinter ring cold exhaust gas zero emission treatment system of claim 1, wherein, The waste gas inlet of the blast furnace tank is arranged at the middle or lower part of the blast furnace tank, and 4-6 waste gas inlets are arranged; an exhaust air blowing pipe is arranged at the waste gas inlet, and the nozzle of the exhaust air blowing pipe is arranged at an angle of 30-50 degrees upward; a pipeline valve is arranged on the exhaust air blowing pipe.

5. The sinter ring cold exhaust gas zero emission treatment system of claim 1, wherein, The blast furnace tank is connected with the sintering ring cooler by an exhaust air fan.

6. The sinter ring cold exhaust gas zero emission treatment system of claim 1, wherein, The blast furnace tank comprises one or more blast furnace tanks for containing blast furnace raw materials; the blast furnace raw materials comprise one or more of sintered ore, pellet ore, lump ore, coke and auxiliary materials.

7. The sinter ring cold exhaust gas zero emission treatment system according to any one of claims 1 to 6, characterized in that, The system further comprises a tail gas treatment device connected with the tail gas outlet of the blast furnace tank to treat the tail gas in the blast furnace tank and then discharge the treated tail gas.

8. The sinter ring cold exhaust gas zero emission treatment system of claim 7, wherein, The tail gas treatment device comprises a dust remover, a dust removal air fan and a chimney connected in sequence; the dust remover is connected with the tail gas outlet of the blast furnace tank; the dust removal air fan extracts the tail gas treated by the dust remover and inputs the extracted tail gas into the chimney to be discharged into the atmosphere through the chimney.

9. A sintering circular cooling waste gas zero emission treatment method, which is realized by the sintering circular cooling waste gas zero emission treatment system according to any one of claims 1-8, characterized in that, The high-temperature waste gas generated by the ring cooler is introduced into the waste heat boiler for waste heat recovery to generate power; the medium-low-temperature waste gas generated by the ring cooler is introduced into the blast furnace tank to preheat the raw materials in the blast furnace tank.

10. The sinter ring cold exhaust gas zero emission treatment method according to claim 9, characterized by, The waste gas recovered in the waste heat boiler is introduced into the cooling section of the ring cooler generating high-temperature waste gas for recycling; the tail gas generated by preheating the raw materials in the blast furnace tank is treated to meet the standard and then discharged into the atmosphere.

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