CN217358104U - Pollution-free increase energy-saving low-carbon production increasing system applied to stepping sintering machine - Google Patents

Abstract

The utility model provides a pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine, comprising: a sintering section flue gas processing module and a cooling section flue gas processing module; the sintering section flue gas processing module includes: a material surface Circulation unit, trolley side wall circulation unit and external exhaust flue gas treatment unit. The utility model re-optimizes the construction of the flue gas system of the stepping sintering machine. Under the condition that the existing environmental protection facilities are not modified, through the distribution of the air volume of the sintering section and the cooling section of the stepping sintering machine, especially the sintering machine is increased. The sidewall air leakage circulation reduces the air volume of the sintering section while increasing the output, and matches the processing capacity of the existing environmental protection treatment facilities, which can increase the output without increasing the pollutant discharge.

Description

A pollution-free, energy-saving and low-carbon production-enhancing system applied to a stepping sintering machine

technical field

The utility model belongs to the technical field of metallurgy, in particular to a pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine.

Background technique

The stepping sintering machine occupies a large proportion in the steel industry. The running trolley of the stepping sintering machine is divided into a sintering section and a cooling section. During normal operation, the sintering end point is controlled at the end of the sintering section. The flue gas is collected by the bellows in the sintering section for dust removal, desulfurization and denitration treatment. The flue gas generated in the cooling section contains only particulate matter, and is collected by the bellows in the cooling section for dedusting treatment.

When the stepping sintering machine needs to increase the output, it is generally achieved by increasing the thickness of the material layer and increasing the speed of the trolley. When the output of the stepping sintering machine exceeds the rated output, the sintering end point will reach the cooling section, causing the flue gas in the cooling section. Adding sulfur dioxide, nitrogen oxides, carbon monoxide and other pollutants, if the cooling section only performs dust removal treatment at this time, it will not be able to meet the emission standards. Adding desulfurization and denitrification facilities to the cooling section will lead to a sharp increase in investment and operating costs.

In addition, the negative pressure of the system during the sintering process of the stepping sintering machine will inevitably lead to a certain degree of air leakage between the material surface gap and the side wall of the trolley, resulting in an increase in the oxygen content of the sintering flue gas. Air leakage from walls, slides and other parts accounts for more than 20%. Air leakage in the system increases flue gas emissions and flue gas oxygen content. When the emission standard is set at 16% of the benchmark oxygen content, the increase in the oxygen content in flue gas will inevitably increase the burden on environmental protection facilities.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the utility model provides a pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine. In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended to be an extensive review, nor is it intended to identify key/critical elements or delineate the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the detailed description that follows.

The utility model adopts the following technical solutions:

In some optional embodiments, a pollution-free, energy-saving, low-carbon production improvement system applied to a stepping sintering machine is provided, comprising: a sintering section flue gas treatment module and a cooling section for collecting the stepping sintering machine The flue gas treatment module in the cooling section for dedusting the flue gas in the bellows;

The sintering section flue gas treatment module includes: a material surface circulation unit, a trolley side wall circulation unit, and an outer exhaust flue gas used for extracting the sintering section bellows of the stepping sintering machine and performing dedusting, desulfurization and denitrification treatment. gas treatment unit;

The trolley side wall circulation unit includes: a side wall flue gas circulation hood and a side wall flue gas circulation fan;

The side wall flue gas circulation hood is arranged on the side wall of the trolley of the stepping sintering machine, and the side wall flue gas circulating fan extracts the flue gas in the bellows in the middle section of the sintering section of the stepping sintering machine and transports it to the side Inside the wall flue gas circulation hood;

The material surface circulation unit includes: a top-side flue gas circulation hood and a material surface flue gas circulation fan;

The top-side flue gas circulation cover extends and covers to the sintering end position after the step-by-step sintering machine is raised, and the material surface flue gas circulation fan extracts the flue gas in the bellows at the end of the sintering section of the step-by-step sintering machine and conveys it. into the top-side flue gas circulation hood.

Further, the side wall circulation unit of the trolley further comprises: a first dust collector; the first dust collector is arranged on the pipe connecting the bellows in the middle section of the sintering section of the stepping sintering machine and the side wall flue gas circulation fan superior.

Further, the side wall circulation unit of the trolley further comprises: a plurality of distribution pipes evenly distributed on the side wall fume circulation hood, and each of the distribution pipes is provided with a pipe valve.

Further, an inspection door and an inspection observation hole are arranged on the side wall fume circulation cover.

Further, the side wall flue gas circulation hood includes: an upper circulation hood and a lower circulation hood; one side of the upper circulation hood is fixedly connected to the ground of the trolley, and the other side is provided with a dynamic connection mechanism, and the dynamic connection mechanism It is in contact with the trolley of the stepping sintering machine; one side of the lower circulation cover is connected with the ground of the trolley, and the other side is connected with the air box of the stepping sintering machine.

Further, the dynamic connection mechanism includes: a rubber plate, a fastening connection piece, a compression spring, a compression frame and a spring fixing piece; one end of the rubber plate is connected to the upper circulation cover through the fastening connection piece, The other end is in contact with the wall plate of the trolley; the compression frame is arranged on the upper circulation cover, one end of the compression spring is connected with the compression frame through the spring fixing member, and the other end is connected with the rubber plate connect.

Further, the side wall flue gas circulation hood is provided with roller inlet and outlet at both ends of the stepping sintering machine, and the top of the roller inlet and outlet is provided with a sealing air curtain.

Further, the material surface circulation unit further includes: a second dust collector; the second dust collector is arranged on the pipe connecting the sintering section tail section bellows of the stepping sintering machine and the material surface flue gas circulation fan .

Further, the externally exhausted flue gas processing unit includes: a flue gas processing sub-unit for performing desulfurization and denitration treatment on the flue gas discharged from the sintering section of the stepping sintering machine; a main exhaust fan for extracting the stepping sintering The flue gas in the sintering section bellows of the stepping sintering machine is transported to the flue gas treatment sub-unit; the third dust collector is arranged on the pipeline connecting the sintering section bellows of the stepping sintering machine and the main exhaust fan, and is used for The flue gas discharged from the sintering section of the walking sintering machine is dedusted.

Further, the cooling section flue gas processing subsystem includes: a fourth dust collector and a cooling fan; the cooling fan is used to extract the flue gas in the cooling section wind box of the stepping sintering machine, and the fourth dust collector is provided with On the pipeline connected with the cooling fan in the cooling section of the stepping sintering machine.

The beneficial effects brought by the utility model:

1. Make full use of the air leakage characteristics of the stepping sintering machine itself, set up a flue gas circulation on the side wall of the stepping sintering machine trolley, select the flue gas in the middle of the sintering section to enter the system through the air leakage point, and replace the air that originally leaked into the system In order to circulate the flue gas, it not only reduces the overall oxygen content of the flue gas, but also reduces the flue gas treatment capacity of the desulfurization and denitrification system;

2. The utility model re-optimizes the construction of the flue gas system of the step-by-step sintering machine, using the redistribution and combination of the bellows and the flue, the method of segmental collection and segmental treatment of flue gas, without adding desulfurization and denitrification facilities. , to achieve the extension of the sintering section of the step-by-step sintering machine and the increase of the output, and at the same time of zero increase in pollutants, the total flue gas volume, flue gas oxygen content and carbon monoxide emissions of the sintering system are reduced, so as to achieve energy saving, emission reduction, purpose of efficiency.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the structural representation of the side wall flue gas circulation hood of the present invention;

Fig. 3 is the layout schematic diagram of the distribution pipeline of the present invention;

Fig. 4 is the structural representation of the dynamic connection mechanism of the present utility model;

FIG. 5 is a schematic diagram of the position of the inlet and outlet of the roller according to the present invention.

Detailed ways

The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The examples represent only possible variations. Unless expressly required, individual components and functions are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments.

As shown in Figures 1-5, in some illustrative embodiments, the present invention provides a pollution-free, energy-saving, low-carbon production-enhancing system applied to a step-by-step sintering machine, which increases production capacity while achieving pollution in flue gas No increase in emissions, and energy-saving and low-carbon operation.

The working material surface of the stepping sintering machine is divided into a sintering section and a cooling section, and a bellows 2 for collecting flue gas is arranged under the trolley 1 of the stepping sintering machine. The utility model will be located in the sintering section of the stepping sintering machine. The lower bellows 2 is defined as the sintering section bellows, and the bellows 2 located below the cooling section of the stepping sintering machine is defined as the cooling section bellows.

The utility model specifically comprises: a sintering section flue gas processing module and a cooling section flue gas processing module.

The flue gas treatment module in the sintering section is used to collect the flue gas in the bellows of the sintering section of the walking sintering machine and perform the treatment of dust removal, desulfurization and denitrification, material surface circulation and side wall circulation.

The cooling section flue gas treatment module is used to collect the flue gas in the cooling section bellows of the stepping sintering machine and perform dedusting treatment.

Therefore, the utility model adopts the combination and division of the bellows 2, and utilizes the flue gas treatment module of the sintering section and the flue gas treatment module of the cooling section to realize the collection and treatment of the two sections of flue gas in the sintering process. The flue gas in the cooling section is only treated for dust removal.

Wherein, the utility model divides the sintering section of the step-by-step sintering machine into the front section of the sintering section, the middle section of the sintering section and the tail section of the sintering section in turn according to the running direction of the trolley, and the lengths of the three sections are determined by the specific sintering environment and sintering parameters. The utility model is not specifically limited. In the present invention, the bellows 2 located under the front section of the sintering section is defined as the bellows in the front section of the sintering section, the bellows 2 located under the middle section of the sintering section is defined as the bellows in the middle section of the sintering section, and the bellows 2 located under the tail section of the sintering section is defined as the bellows in the tail section of the sintering section .

The flue gas treatment module of the sintering section includes: a material surface circulation unit, a trolley side wall circulation unit and an external exhaust flue gas treatment unit.

The externally exhausted flue gas treatment unit is used to extract the externally exhausted flue gas from the bellows of the sintering section of the stepping sintering machine and perform dedusting, desulfurization and denitrification treatment. The remaining external exhaust flue gas after the utilization of the two circulating flue gases used by the material surface circulation unit and the trolley side wall circulation unit are all desulfurized and denitrified by the external exhaust flue gas treatment unit.

Among them, the exhaust gas processing unit includes: a flue gas processing sub-unit 3 , a main exhaust fan 4 , and a third dust collector 5 .

The third dust collector 5 is arranged on the pipe connecting the sintering section bellows of the stepping sintering machine with the main exhaust fan 4, so that the flue gas in the sintering section bellows first enters the third dust collector 5 for dedusting treatment, and the main exhaust fan 4 It is used to extract the flue gas from the bellows of the sintering section of the walking sintering machine and transport it to the flue gas treatment sub-unit 3, which is used for desulfurization and denitration treatment of the flue gas discharged from the sintering section. Among them, the flue gas treatment sub-unit 3 can be selected from the existing desulfurization and denitration flue gas treatment system.

The material surface circulation unit includes: a top-side flue gas circulation cover 6 , a material surface flue gas circulation fan 7 and a second dust collector 8 .

The top-side flue gas circulation cover 6 communicates with the inside of the trolley 1, and extends to cover the sintering end position after the step-by-step sintering machine is upgraded. The second dust collector 8 is arranged on the pipe connecting the bellows at the end of the sintering section of the stepping sintering machine and the flue gas circulating fan 7 on the material surface. After dust removal treatment, the flue gas circulation fan 7 on the material surface extracts the flue gas in the bellows at the end of the sintering section of the stepping sintering machine and transports it to the top side flue gas circulation hood 6 .

In the production process of the step-by-step sintering machine, the oxygen content of the flue gas in the sintering section is distributed from low to high with the sintering process. The closer to the sintering end point, the higher the oxygen content. The flue gas temperature of each bellows also increases with the sintering process, and the closer to the sintering end point, the higher the flue gas temperature.

The utility model is based on the material surface circulating unit. In the aspect of flue gas circulating hot air sintering, the top side flue gas circulating hood 6 is extended to the sintering end position after production improvement, and at the same time, the flue gas with high oxygen content and high temperature in the bellows in the tail section of the sintering section is selected. As circulating flue gas, it enters the top side flue gas circulating hood 6 for hot air sintering, and the circulating flue gas volume accounts for 20-30% of the total flue gas volume. The circulating flue gas returns to the upper part of the sintering material surface after being dedusted, and is evenly distributed to the sintering material surface through the pipeline and the distribution of multiple points of the top-side flue gas circulating hood 6 to realize hot air sintering. The top-side flue gas circulating hood 6 maintains a slight The negative pressure state ensures that the circulating flue gas does not leak. The structural design of the utility model enables hot air sintering to greatly reduce the sintering fuel ratio, and at the same time reduce the generation and emission of carbon monoxide, and the quality of the sintered ore is also guaranteed due to the selection of high-oxygen flue gas circulation.

The side wall circulation unit of the trolley includes: a side wall flue gas circulation cover 9 , a side wall flue gas circulation fan 10 and a first dust collector 11 .

The side wall flue gas circulation cover 9 is arranged on the side wall of the trolley of the stepping sintering machine, and the side wall flue gas circulation cover 9 seals the air leakage parts such as the side wall of the trolley and the slideway within itself. The first dust collector 11 is arranged on the pipe connecting the bellows in the middle section of the sintering section and the flue gas circulating fan 10 on the side wall. The flue gas discharged from the bellows in the middle section of the sintering section first enters the first dust collector 11 for dust removal. The side wall flue gas circulation fan 10 extracts the flue gas in the middle bellows of the sintering section of the stepping sintering machine and transports it to the side wall flue gas circulation hood 9, that is, the utility model selects the sintering middle section smoke with low oxygen content and low sulfur dioxide concentration. Instead of the original leaked air, it uses its own flue gas recycling, which not only reduces the total air volume of the system, but also reduces the oxygen content of the flue gas.

The flue gas used for the circulation of the side wall of the trolley accounts for 15-20% of the total flue gas volume. Due to the low oxygen content, the oxygen content of the total flue gas can be reduced by replacing the air, and the reduction rate can reach 3-5%. The low concentration of sulfur dioxide in the medium will not cause corrosion to the sintering equipment.

Based on the circulation unit of the side wall of the trolley, the utility model makes full use of the air leakage characteristic of the stepping sintering machine itself, and sets a flue gas circulation on the side wall of the trolley of the stepping sintering machine, and selects the middle part of the sintering section with low oxygen content and pollutants. Low-concentration flue gas, especially sulfur dioxide, enters the sintering system through the air leakage point of the device, and replaces the air leaking into the sintering system with circulating flue gas, that is, the flue gas circulation through the circulation unit on the side wall of the trolley reduces the overall flue gas. Oxygen content, while reducing the flue gas treatment capacity of desulfurization and denitrification.

The trolley side wall circulation unit of the utility model realizes the circulation of the smoke on the side wall of the trolley, and the material surface circulation unit realizes the circulation of the smoke gas on the material surface. , increasing the output of the stepper sintering machine. At the same time, the structural design of the utility model can ensure that the amount of flue gas to be treated in the sintering section does not increase, that is, under the processing capacity of the original desulfurization and denitrification system, the exhaust flue gas treatment unit can realize all the flue gas containing sulfur dioxide and nitrogen oxides. When the treatment reaches the standard, the amount of flue gas in the cooling section is reduced compared with that before optimization, and the load of the flue gas treatment system is reduced.

The cooling section flue gas treatment subsystem includes: a fourth dust collector 12 and a cooling fan 13 .

The cooling fan 13 is used to extract the flue gas in the cooling section bellows of the stepping sintering machine, and the fourth dust collector 12 is arranged on the pipeline connecting the cooling section bellows of the stepping sintering machine with the cooling fan 13 for dust removal.

In order to avoid the pollutants such as sulfur dioxide and nitrogen oxides appearing in the flue gas of the cooling section when the output of the stepping sintering machine is increased, the construction of pollution control facilities and operating costs are increased, and the utility model re-optimizes the construction of the stepping sintering machine. The new flue gas system uses the redistribution and combination of the bellows and the flue to realize the extension of the sintering section, and at the same time the sintering increases production, all flue gas containing sulfur dioxide and nitrogen oxides are used in the original desulfurization and denitrification system, that is, the external exhaust flue gas treatment unit to be processed. The flue gas containing sulfur dioxide and nitrogen oxides that enters the cooling section due to the increase in production is merged into the flue gas treatment module of the sintering section through the distribution and combination of the bellows, and the remaining part of the flue gas containing only particulate matter is still processed by the flue gas treatment unit in the cooling section. system to process.

Through the optimization of the utility model, the step-by-step sintering machine can achieve a 50% increase in output, a 40-50% reduction in flue gas volume, and no increase in pollutants. The original desulfurization and denitrification system can be used to achieve standard discharge, and at the same time reduce carbon monoxide in the system emissions.

On the basis of the above, the utility model mixes 1‰ special sintering additives in the sintering batching process, which can improve the sintering environment, improve the utilization rate of fuel and oxygen in the sintering process, and improve the sintering process. Increase production by 10% while reducing carbon monoxide emissions during sintering.

In the case of optimizing the flue gas system and adding special sintering additives, the utility model can realize the optimization through the utility model, and the stepping type sintering machine can increase the output by 60%, reduce the amount of flue gas by 40-50%, and reduce pollution. There is no increase in the amount of waste, and the original desulfurization and denitrification system can be used to achieve the emission standard, and at the same time reduce the carbon monoxide emission of the system.

The structure design of the utility model enables the distribution of the air volume between the sintering section and the cooling section of the step-by-step sintering machine without the modification of the existing environmental protection facilities, especially the air leakage circulation of the side wall of the sintering machine is increased, and the output is increased at the same time. Reducing the air volume of the sintering section and matching the processing capacity of the existing environmental protection treatment facilities can increase the output without changing the pollutant discharge.

As shown in FIG. 3, the trolley side wall circulation unit also includes: a plurality of distribution pipes 14 evenly distributed on the side wall fume circulation cover 9, and each distribution pipe 14 is provided with a pipeline valve 15, and the side wall fume The circulation cover 9 is provided with an inspection door 16 and an inspection observation hole 17 .

The low-oxygen and low-sulfur dioxide flue gas is circulated to the side wall flue gas circulation hood 9 through the side wall flue gas circulation fan 10 after dust removal. The distribution pipeline 14 and the pipeline valve 15 are used to divide the flue gas according to the length of the circulating hood. The flue gas distribution is arranged in the side wall flue gas circulation hood 9, and the negative pressure generated by the air leakage of the stepping sintering machine is used to inhale the general flue instead of the air inhaled before optimization. The side wall flue gas circulation hood 9 maintains a micro-negative pressure state not higher than -10Pa, and the circulating flue gas will not leak out. An inspection and observation hole 17 and an inspection door 16 are provided on the side wall fume circulation cover 9 to facilitate routine inspection and maintenance.

The side wall flue gas circulation hood 9 is arranged on both sides of the trolley 1, and each side is composed of the part above the trolley platform and the part below the trolley platform, that is, the side wall flue gas circulation hood 9 includes: an upper circulation hood 91 and a lower circulation hood 91. The hood 92, together with the dynamic trolley 1 and the static bellows 2, form a trolley side wall air-tight hood.

The lower circulation cover 92 and the bellows 2 are statically sealed, that is, one side of the lower circulation cover 92 is fixedly connected to the trolley floor 18, and the other side is fixedly connected to the bellows 2 of the stepping sintering machine. The fixed connection method can be selected as Bolted connection can effectively maintain the negative pressure in the hood.

The seal between the upper circulation cover 91 and the trolley 1 is a dynamic seal, that is, one side of the upper circulation cover 91 is fixedly connected with the trolley ground 18, and the connection method can be bolted, and the other side of the upper circulation cover 91 is provided with a dynamic connection mechanism , and the dynamic connection mechanism is in contact with the trolley of the stepping sintering machine, specifically, in contact with the trolley wall plate 19 to achieve dynamic sealing.

As shown in FIG. 4 , the dynamic connection mechanism includes: a rubber plate 20 , a fastening connection piece 21 , a compression spring 22 , a pressing frame 23 and a spring fixing piece 24 .

One end of the rubber plate 20 is connected to the upper circulation cover 91 through the fastening connector 21, and the other end is in contact with the trolley wall plate 19, so that the rubber plate 20 is always in the state of being placed on the trolley wall plate 19, which does not affect the trolley. The movement of the trolley can also ensure the sealing between the trolley 1 and the upper circulation cover 91 . Specifically, bolts can be selected for the fastening connector 21, which is sealed with a flexible rubber plate 20. At the front end of the upper circulation cover 91, a rubber plate 20 of the same length as the upper circulation cover 91 is installed by means of bolts. One end is in close contact with the top end of the trolley wall plate 19 to form a dynamic seal.

The compression frame 23 is arranged on the upper circulating cover 91 , one end of the compression spring 22 is connected to the compression frame 23 through the spring fixing member 21 , and the other end is connected to the rubber plate 20 . Specifically, bolts can be selected for the spring fixing member 21 , and the compression springs 22 are evenly distributed according to the length of the upper circulation cover 91 . The compression spring 22 exerts a urging force on the rubber plate 20 to ensure that the flexible rubber plate 20 is tightly combined with the top end of the trolley wall plate 19 .

The side wall flue gas circulation cover 9 is provided with roller inlets and outlets 25 at both ends of the corresponding stepping sintering machine, and the top of the roller inlets and outlets 25 is provided with a sealing air curtain 26 . The design of the roller inlet and outlet 25 can facilitate the normal production and operation of the trolley 1, and can also ensure that the negative pressure in the side wall fume circulation cover 9 and the flue gas do not overflow. The outside air and the smoke in the hood are separated by sealing the air curtain 26, and the gas of the air curtain is the air in the workshop.

Those skilled in the art will also appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments herein may be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether this functionality is implemented as hardware or software depends on the specific application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, however, such implementation decisions should not be interpreted as a departure from the scope of the present disclosure.

Claims (10)

1. A pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine, characterized in that it comprises: a sintering section flue gas treatment module and a cooling section bellows for collecting the smoke in the stepping sintering machine Cooling section flue gas treatment module for dedusting treatment; The sintering section flue gas treatment module includes: a material surface circulation unit, a trolley side wall circulation unit, and an outer exhaust flue gas used for extracting the sintering section bellows of the stepping sintering machine and performing dedusting, desulfurization and denitrification treatment. gas treatment unit; The trolley side wall circulation unit includes: a side wall flue gas circulation hood and a side wall flue gas circulation fan; The side wall flue gas circulation hood is arranged on the side wall of the trolley of the stepping sintering machine, and the side wall flue gas circulating fan extracts the flue gas in the bellows in the middle section of the sintering section of the stepping sintering machine and transports it to the side Inside the wall flue gas circulation hood; The material surface circulation unit includes: a top-side flue gas circulation hood and a material surface flue gas circulation fan; The top-side flue gas circulation cover extends and covers to the sintering end position after the step-by-step sintering machine is raised, and the material surface flue gas circulation fan extracts the flue gas in the bellows at the end of the sintering section of the step-by-step sintering machine and conveys it. into the top-side flue gas circulation hood. 2 . The pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 1 , wherein the trolley side wall circulation unit further comprises: a first dust collector; The first dust collector is arranged on the pipe connecting the bellows in the middle section of the sintering section of the stepping sintering machine and the side wall flue gas circulating fan. 3. A pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 2, wherein the trolley sidewall circulation unit further comprises: a plurality of uniformly distributed in the Distribution pipelines on the side wall flue gas circulation cover, and pipeline valves are arranged on each of the distribution pipelines. 4. A pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 3, characterized in that, an inspection door and an inspection observation hole are arranged on the side wall flue gas circulation hood. 5 . The pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 4 , wherein the side wall flue gas circulation hood comprises: an upper circulation hood and a lower circulation hood. 6 . ; One side of the upper circulation cover is fixedly connected with the trolley ground, and the other side is provided with a dynamic connection mechanism, and the dynamic connection mechanism is in contact with the trolley of the stepping sintering machine; One side of the lower circulation cover is connected to the ground of the trolley, and the other side is connected to the bellows of the stepping sintering machine. 6. A pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 5, wherein the dynamic connection mechanism comprises: a rubber plate, a fastening connection, a compression spring , compression frame and spring fixing parts; One end of the rubber plate is connected with the upper circulation hood through the fastening connector, and the other end is in contact with the trolley wall plate; The pressing frame is arranged on the upper circulating cover, one end of the compression spring is connected with the pressing frame through the spring fixing member, and the other end is connected with the rubber plate. 7 . The pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 6 , wherein the side wall flue gas circulation cover is located at both ends of the stepping sintering machine. 8 . A roller inlet and outlet are provided, and a sealing air curtain is arranged on the top of the roller inlet and outlet. 8 . The pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 7 , wherein the material surface circulation unit further comprises: a second dust collector; the first The second dust collector is arranged on the pipe connecting the wind box at the end of the sintering section of the stepping sintering machine and the flue gas circulating fan on the material surface. 9 . The pollution-free, energy-saving, low-carbon production-enhancing system applied to a stepping sintering machine according to claim 8 , wherein the external exhaust flue gas processing unit comprises: 10 . The flue gas treatment sub-unit is used for desulfurization and denitration treatment of the flue gas discharged from the sintering section of the walking sintering machine; The main exhaust fan is used to extract the flue gas in the bellows of the sintering section of the stepping sintering machine and transport it to the flue gas processing sub-unit; The third dust collector is arranged on the pipe connecting the sintering section bellows of the stepping sintering machine and the main exhaust fan, and is used for dedusting the flue gas discharged from the sintering section of the stepping sintering machine. 10 . The pollution-free, energy-saving, low-carbon production improvement system applied to a stepping sintering machine according to claim 9 , wherein the cooling section flue gas treatment subsystem comprises: a fourth dust collector and a cooling system. 11 . fan; the cooling fan is used to extract the flue gas in the cooling section bellows of the stepping sintering machine, and the fourth dust collector is arranged on the pipeline connecting the cooling section bellows of the stepping sintering machine with the cooling fan .

Images