Bypass ventilation waste gas treatment system

Abstract

The utility model discloses a bypass ventilation waste gas treatment system which comprises a kiln tail smoke chamber, a quenching chamber, a cyclone cylinder, a bypass waste heat boiler, a dust collector, a dust collector exhaust fan, a cooling fan and the like. High-temperature dust-containing gas exhausted by the kiln tail smoke chamber is firstly mixed with cooling air to be cooled in the quenching chamber, then is subjected to dust collection through the cyclone cylinder, waste heat power generation through the bypass waste heat boiler and purification through the dust collector, and finally is conveyed to the cooling fan through the dust collector exhaust fan to be used for cooling clinker through the grate cooler. And the waste gas discharged by the grate cooler reacts with the preheater through the kiln tail smoke chamber to generate nitrogen, so that up-to-standard discharge is realized. The system is further provided with a cold air valve, an electric butterfly valve and the like, air temperature can be adjusted, air volume is controlled, and stable operation of the system is guaranteed. The device effectively solves the problem that nitric oxide of an existing bypass ventilation system exceeds the standard, waste gas waste heat utilization and recycling are achieved, the production cost of cement production enterprises is reduced, the environmental protection requirement is met, and remarkable economic and environmental benefits are achieved.

Description

A bypass exhaust gas treatment system Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a bypass venting waste gas treatment system. Background Technology

[0002] In the field of new dry-process cement production, the stability of the production process and product quality are constrained by various factors, among which the content of elements such as potassium, sodium, chlorine, and sulfur in raw materials and fuels is a key influencing factor. When these elements are present in excess, they can seriously interfere with the stable operation of the cement production system, not only leading to excessive alkali content in clinker but also reducing clinker strength, negatively impacting cement product quality. In recent years, to actively respond to the requirements of "dual carbon and ultra-low emissions," cement plants have vigorously promoted the use of alternative fuels. With the input of alternative fuels such as municipal solid waste, waste textiles, and biomass into the kiln tail incineration, large amounts of harmful elements such as chlorine and alkali metals are introduced into the production system, their content increasing dramatically, posing greater challenges to the production process. Against this backdrop, bypass ventilation systems have become an important means of solving the problem of harmful element accumulation.

[0003] However, existing bypass ventilation systems have significant drawbacks. Currently, the high-temperature flue gas extracted through bypass ventilation is cooled in a quench chamber and then purified by a bag filter. There are two subsequent discharge methods: one is to discharge it into the atmosphere via the dust collector's exhaust fan, and the other is to discharge it directly into the kiln tail chimney. Both methods lead to nitrogen oxide emissions. Whether discharged into the atmosphere or through the kiln tail chimney, nitrogen oxide emissions exceed national standards, failing to meet environmental protection requirements and hindering the sustainable development of cement enterprises. Therefore, developing a new bypass ventilation exhaust gas treatment system is urgently needed, one that can effectively remove harmful elements, solve the problem of excessive nitrogen oxides, meet environmental protection requirements, and reduce production costs. Summary of the Invention

[0004] The purpose of this utility model is to provide a bypass venting exhaust gas treatment system to solve the problem of excessive nitrogen oxide emissions after high-temperature flue gas treatment in existing bypass venting systems, while also realizing the utilization of waste heat from the exhaust gas.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A bypass venting exhaust gas treatment system, comprising:

[0006] The kiln tail flue serves as the starting point for high-temperature, dust-laden gas; the kiln tail flue is connected to a preheater.

[0007] A quench chamber, which is connected to the kiln tail flue chamber, is used to receive the high-temperature dust-laden gas discharged from the kiln tail flue chamber.

[0008] A cyclone separator, the inlet of which is connected to the outlet of the quench chamber, is used to receive the mixed gas discharged from the quench chamber;

[0009] A bypass waste heat boiler, wherein the inlet of the bypass waste heat boiler is connected to the outlet of the cyclone separator, and the bypass waste heat boiler is used to receive the flue gas discharged from the cyclone separator.

[0010] A dust collector, the inlet of which is connected to the outlet of the bypass waste heat boiler, is used to treat the dust-laden exhaust gas discharged from the bypass waste heat boiler.

[0011] A dust collector exhaust fan, wherein the inlet of the dust collector exhaust fan is connected to the outlet of the dust collector, and the dust collector exhaust fan is used to transport the exhaust gas treated by the dust collector out.

[0012] A cooling fan, the inlet of which is connected to the outlet of the dust collector exhaust fan via a pipe, and the outlet of which is connected to the grate cooler in the firing kiln head workshop via a pipe;

[0013] The exhaust gas discharged from the grate cooler is reduced and chemically reacted in the high-temperature reducing environment of the kiln tail flue and the preheater to generate nitrogen.

[0014] As a preferred option for bypass venting exhaust gas treatment systems, it also includes:

[0015] A quenching fan is connected to the quenching chamber and delivers cooling air into the quenching chamber.

[0016] As a preferred embodiment of the bypass venting exhaust gas treatment system, a cold air valve is provided on the conveying pipe between the dust collector exhaust fan and the inlet of the cooling fan.

[0017] As a preferred embodiment of the bypass venting exhaust gas treatment system, an electric butterfly valve is provided at the front end of the distribution pipe from the dust collector exhaust fan to the grate cooler. The electric butterfly valve is configured to close when the bypass venting system is stopped and the firing system is running.

[0018] As a preferred embodiment of the bypass venting exhaust gas treatment system, the quench chamber, the cyclone separator, the bypass waste heat boiler, and the dust collector are sequentially connected by high-temperature resistant pipes, and the dust collector exhaust fan is connected to the cooling fan inlet by a temperature and pressure resistant pipe.

[0019] The beneficial effects of this utility model are as follows:

[0020] First, the system treats the high-temperature, dust-laden gas discharged from the kiln tail flue by sequentially introducing it into the quench chamber, cyclone separator, bypass waste heat boiler, and dust collector, effectively separating and purifying pollutants such as dust and harmful gases in the exhaust gas. Simultaneously, the exhaust gas discharged from the grate cooler undergoes reduction and chemical reactions in the high-temperature reducing environment of the kiln tail flue and preheater to generate nitrogen, avoiding the emission of pollutants such as nitrogen oxides, meeting environmental protection regulations, and reducing atmospheric pollution.

[0021] Secondly, the installation of bypass waste heat boilers can make full use of high-temperature flue gas to generate electricity from waste heat, converting the originally wasted heat energy into electrical energy, realizing energy recycling and utilization, providing additional energy support for cement production enterprises, reducing the enterprises' electricity costs, improving energy utilization efficiency, and conforming to the development trend of energy conservation and emission reduction.

[0022] Third, the exhaust gas treated by the dust collector is transported to the cooling fan via the dust collector's exhaust fan, and then enters the grate cooler as the air source for cooling the clinker, realizing the secondary utilization of the exhaust gas. This not only reduces the demand for fresh air and lowers the energy consumption of the fan, but also improves the cooling effect of the grate cooler, which helps to improve the quality and yield of clinker, thereby enhancing the overall production efficiency of cement production enterprises. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0025] Figure 1 is a schematic diagram of the bypass venting exhaust gas treatment system provided in the embodiment of this utility model.

[0026] In the diagram, 1. Kiln tail smoke chamber; 2. Quenching chamber; 3. Quenching fan; 4. Cyclone; 5. Bypass waste heat boiler; 6. Dust collector; 7. Dust collector exhaust fan; 8. Cooling fan; 9. Grate cooler in the firing kiln head workshop; 10. Preheater. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] Referring to Figure 1, this embodiment of the present invention provides a bypass venting exhaust gas treatment system, comprising:

[0030] The kiln tail flue chamber 1 serves as the starting point for high-temperature dust-laden gas; the kiln tail flue chamber 1 is connected to a preheater 10. In the cement production process, the kiln tail flue chamber 1 is the convergence point for high-temperature dust-laden gas in the kiln system. When cement raw materials are calcined in the kiln, a large amount of high-temperature dust-laden waste gas is generated, which first accumulates in the kiln tail flue chamber 1. The preheater 10, connected to the kiln tail flue chamber 1, utilizes the high-temperature waste gas discharged from the kiln tail to preheat the raw materials, improving energy efficiency. The high-temperature dust-laden gas flows from the kiln tail flue chamber 1 to the preheater 10, where it exchanges heat with the raw materials, providing preliminary heating before entering the kiln. This reduces the energy required for calcination in the kiln and also helps improve the overall thermal efficiency of the cement production process.

[0031] A quench chamber 2, connected to the kiln tail flue chamber 1, is used to receive the high-temperature dust-laden gas discharged from the kiln tail flue chamber 1. The high-temperature dust-laden gas discharged from the kiln tail flue chamber 1 is typically quite hot; direct subsequent treatment could damage the equipment and hinder the removal of harmful substances from the exhaust gas. The function of the quench chamber 2 is to rapidly reduce the temperature of the high-temperature dust-laden gas. When the high-temperature dust-laden gas enters the quench chamber 2, it is rapidly mixed with the cooling medium (such as the cooling air supplied by the quench fan 3) within the quench chamber 2, causing the gas temperature to drop quickly. This rapid cooling prevents harmful substances in the exhaust gas (such as alkali metals and chlorine) from recondensing and circulating, and also allows some harmful substances to precipitate in solid form during the quenching process, facilitating subsequent separation and removal.

[0032] Cyclone 4, whose inlet is connected to the outlet of the quench chamber 2, is used to receive the mixed gas discharged from the quench chamber 2. Even after being cooled by the quench chamber 2, the mixed gas still contains a large amount of dust particles. Cyclone 4 utilizes the principle of centrifugal force to perform gas-solid separation of the mixed gas. When the mixed gas enters cyclone 4 at a high speed, it rotates inside the cyclone. Due to their large mass, the dust particles are thrown against the inner wall of cyclone 4 under the action of centrifugal force and slide down the inner wall, eventually being discharged from the bottom of cyclone 4. The relatively clean gas after separation is discharged from the top outlet of cyclone 4 and enters the next processing stage. This effectively removes most of the dust from the exhaust gas, reducing the burden on subsequent equipment (such as bypass waste heat boiler 5 and dust collector 6).

[0033] A bypass waste heat boiler 5 is provided, with its inlet connected to the outlet of the cyclone separator 4. The bypass waste heat boiler 5 receives the flue gas discharged from the cyclone separator 4. The flue gas discharged from the cyclone separator 4 still retains a certain temperature and heat. The function of the bypass waste heat boiler 5 is to utilize this waste heat for power generation or steam production. When the flue gas enters the bypass waste heat boiler 5, it exchanges heat with the water inside the boiler, heating the water into steam. The steam can drive a steam turbine to generate electricity, converting heat energy into electrical energy, thus achieving energy recovery and utilization. In this way, not only can energy waste be reduced, but production costs for enterprises can also be lowered, improving economic efficiency.

[0034] Dust collector 6, whose inlet is connected to the outlet of the bypass waste heat boiler 5, is used to treat the dust-laden waste gas discharged from the bypass waste heat boiler 5. The waste gas after heat exchange in the bypass waste heat boiler 5 may still contain a small amount of dust and other fine particles. The function of dust collector 6 is to further purify the waste gas and remove the remaining dust. Dust collector 6 typically uses principles such as filtration and electrostatic adsorption to treat the waste gas. For example, a baghouse dust collector 6 uses the filtration effect of the bags to trap dust in the waste gas on the surface of the bags, while clean gas is discharged through the bags; an electrostatic dust collector 6 uses a high-voltage electric field to charge the dust particles, and then adsorbs the dust onto the dust collection plate under the action of the electric field force. Through the treatment of dust collector 6, the dust content in the waste gas can be reduced to a level that meets environmental emission standards.

[0035] The dust collector exhaust fan 7 has its inlet connected to the outlet of the dust collector 6. The exhaust fan 7 is used to transport the treated exhaust gas from the dust collector 6. The treated exhaust gas from the dust collector 6 needs to be transported to the next stage or discharged into the atmosphere using a power source. The function of the dust collector exhaust fan 7 is to provide this power. The exhaust fan generates suction through a high-speed rotating impeller, drawing the exhaust gas from the dust collector 6 and transporting it through a pipe to the inlet of the cooling fan 8. The airflow and air pressure of the exhaust fan need to be rationally configured according to the needs of the entire exhaust gas treatment system to ensure that the exhaust gas can flow smoothly within the system.

[0036] A cooling fan 8 is connected to the inlet of the dust collector exhaust fan 7 via a pipe, and the outlet of the cooling fan 8 is connected to the grate cooler 9 in the kiln head workshop via a pipe. Although the exhaust gas treated by the dust collector 6 has been purified, its temperature may still be high. The function of the cooling fan 8 is to further cool the exhaust gas and transport it to the grate cooler 9 in the kiln head workshop. The cooling fan 8 draws in cold air from the outside and mixes it with the exhaust gas to lower its temperature. Then, the cooled exhaust gas is transported to the grate cooler as the air source for cooling the clinker. In the grate cooler, the exhaust gas exchanges heat with the high-temperature clinker, causing the clinker to cool rapidly. At the same time, the exhaust gas itself absorbs heat, increasing its temperature. This improves the cooling efficiency of the grate cooler and also enables the secondary utilization of the exhaust gas.

[0037] The exhaust gas from the grate cooler is reduced and chemically reacted in the high-temperature reducing environment of the kiln tail flue chamber 1 and the preheater 10 to generate nitrogen. The exhaust gas from the grate cooler may contain pollutants such as nitrogen oxides. When this exhaust gas re-enters the kiln tail flue chamber 1 and the preheater 10, the nitrogen oxides in the exhaust gas undergo a reduction reaction with reducing agents (such as carbon monoxide, hydrocarbons, etc.) in the high-temperature reducing environment. Under high temperature and with a catalyst, the nitrogen oxides are reduced to nitrogen and water. For example, carbon monoxide reacts with nitrogen oxides to produce nitrogen and carbon dioxide. In this way, the nitrogen oxides in the exhaust gas can be converted into harmless nitrogen, thereby reducing nitrogen oxide emissions and achieving environmental protection goals.

[0038] In one possible embodiment, it further includes: a quench fan 3, which is connected to the quench chamber 2, and the quench fan 3 delivers cooling air into the quench chamber 2.

[0039] Specifically, the main function of the quench fan 3 is to provide cooling air to the quench chamber 2. As mentioned earlier, the quench chamber 2 needs to rapidly reduce the temperature of the high-temperature dust-laden gas, and the cooling air delivered by the quench fan 3 is the key factor in achieving this goal. The quench fan 3 draws in cold air from the outside through a high-speed rotating impeller and delivers it to the quench chamber 2 at a certain pressure and volume. Inside the quench chamber 2, the cooling air mixes thoroughly with the high-temperature dust-laden gas, carrying away a large amount of heat and causing the gas temperature to drop rapidly. The airflow and pressure of the quench fan 3 need to be reasonably adjusted according to the flow rate and temperature of the high-temperature dust-laden gas to ensure the stability and reliability of the quenching effect.

[0040] In one possible embodiment, a cold air valve is provided on the conveying pipe between the dust collector exhaust fan 7 and the inlet of the cooling fan 8.

[0041] Specifically, the function of the cold air valve is to regulate the temperature of the exhaust gas entering the cooling fan 8. Since the temperature of the exhaust gas discharged from the dust collector exhaust fan 7 may vary depending on operating conditions, it is necessary to control the temperature of the exhaust gas entering the cooling fan 8 within a certain range to ensure the normal operation of the cooling fan 8 and the grate cooler. When the exhaust gas temperature is too high, the cold air valve is opened, allowing outside cold air to enter the conveying pipe and mix with the exhaust gas, thus lowering its temperature. When the exhaust gas temperature is suitable, the cold air valve can be closed to reduce unnecessary cold air entry. In this way, precise control of the exhaust gas temperature can be achieved, improving the system's operating efficiency and stability.

[0042] In one possible embodiment, an electric butterfly valve is provided at the front end of the distribution pipe from the dust collector exhaust fan 7 to the grate cooler, and the electric butterfly valve is configured to close when the bypass ventilation system is stopped and the firing system is running.

[0043] Specifically, if the bypass ventilation system shuts down while the firing system continues to run, failure to close the electric butterfly valve may cause high-temperature gas or dust from the firing system to flow back into the bypass ventilation system through the pipes, damaging the equipment in the bypass ventilation system. The electric butterfly valve effectively prevents this from happening. When the bypass ventilation system shuts down, the control system automatically closes the electric butterfly valve, cutting off the flow of gas from the dust collector exhaust fan 7 to the grate cooler, preventing backflow. When the bypass ventilation system is running normally, the electric butterfly valve opens, ensuring that exhaust gas can be smoothly transported from the dust collector exhaust fan 7 to the grate cooler.

[0044] In one possible embodiment, the quench chamber 2, the cyclone 4, the bypass waste heat boiler 5, and the dust collector 6 are connected in sequence by high-temperature resistant pipes, and the dust collector exhaust fan 7 is connected to the inlet of the cooling fan 8 by a temperature and pressure resistant pipe.

[0045] Specifically, since the entire waste gas treatment system involves the transportation of high-temperature dust-laden gas, high-temperature resistant pipelines are required to ensure the safe operation of the system. The pipelines between the quench chamber 2, cyclone separator 4, bypass waste heat boiler 5, and dust collector 6 need to withstand the scouring and corrosion of high-temperature waste gas. High-temperature resistant pipelines can effectively prevent damage to the pipelines due to high temperatures, extending their service life. Similarly, the pipeline between the dust collector exhaust fan 7 and the inlet of the cooling fan 8 must withstand not only a certain temperature but also the pressure generated by the exhaust fan; therefore, temperature and pressure resistant pipelines are required. These temperature and pressure resistant pipelines ensure that waste gas will not leak during transportation, ensuring the system's sealing and stability. They also ensure that the waste gas flows smoothly along the designed route, improving the overall operating efficiency of the waste gas treatment system.

[0046] The working principle of this utility model is as follows:

[0047] First, waste gas collection and preliminary treatment: During cement production, high-temperature dust-laden gas is generated in the kiln tail flue chamber 1. This gas first enters the preheater 10, where its heat is used to preheat the raw materials, improving energy efficiency. Afterward, the high-temperature dust-laden gas enters the quench chamber 2, where a quench fan 3 delivers cooling air, rapidly mixing it with the high-temperature dust-laden gas and quickly lowering the temperature to below 400℃. This rapid cooling prevents the circulation of harmful elements, and some harmful substances will precipitate out in a solid state, facilitating subsequent treatment.

[0048] Second, dust separation and waste heat utilization: The rapidly cooled mixed gas enters the cyclone separator 4, where centrifugal force achieves gas-solid separation, separating most of the dust and reducing the burden on subsequent equipment. Then, the discharged flue gas enters the bypass waste heat boiler 5, utilizing the high-temperature flue gas of approximately 400℃ for waste heat power generation, converting heat energy into electrical energy, reducing production costs, and improving the overall energy utilization rate. After waste heat utilization, the exhaust gas temperature is controlled below 200℃.

[0049] Third, deep purification and exhaust gas transportation: The dust-laden exhaust gas discharged from the bypass waste heat boiler 5 enters the dust collector 6, which further purifies the exhaust gas, removes residual dust, and ensures that the exhaust gas meets environmental emission standards. The purified exhaust gas is then transported by the dust collector exhaust fan 7. On the transportation pipeline, a cold air valve can adjust the temperature of the exhaust gas entering the cooling fan 8 to ensure that it is within a suitable range (such as around 60℃), thus avoiding damage to the cooling fan 8 and subsequent equipment due to high temperatures.

[0050] Fourth, waste gas reuse and final treatment: After temperature adjustment, the waste gas enters the cooling fan 8 and is then transported to the grate cooler 9 in the kiln head workshop as a cooling source for the clinker. In the grate cooler, the waste gas exchanges heat with the high-temperature clinker, cooling the clinker while simultaneously raising its own temperature. Afterward, the waste gas discharged from the grate cooler passes through the kiln tail flue chamber 1 and the preheater 10, where a chemical reaction occurs in a high-temperature reducing environment, reducing pollutants such as nitrogen oxides into nitrogen gas, achieving environmentally compliant emissions.

[0051] Fifth, system safety and stability assurance: An electric butterfly valve is installed at the front end of the distribution pipeline from the dust collector exhaust fan 7 to the grate cooler. When the bypass ventilation system stops but the firing system is still running, the electric butterfly valve closes to prevent high-temperature gas or dust in the firing system from flowing back into the bypass ventilation system, thus protecting the equipment. An electric butterfly valve is also installed at the inlet of the cooling fan 8. When the exhaust air from the bypass ventilation system cannot meet the airflow requirements of the cooling fan 8, this valve is opened to supplement fresh air, ensuring stable cooling effect of the grate cooler and maintaining the normal operation of the entire production system.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A bypass venting exhaust gas treatment system, characterized in that, include: Kiln tail flue (1), serving as the starting point for high-temperature dust-laden gas; the kiln tail flue (1) is connected to a preheater (10); quench chamber (2), which is connected to the kiln tail flue (1) and is used to receive the high-temperature dust-laden gas discharged from the kiln tail flue (1); cyclone separator (4), whose inlet is connected to the outlet of the quench chamber (2) and is used to receive the mixed gas discharged from the quench chamber (2); bypass waste heat boiler (5), whose inlet is connected to the outlet of the cyclone separator (4) and is used to receive the flue gas discharged from the cyclone separator (4); A dust collector (6) is connected at its inlet to the outlet of the bypass waste heat boiler (5) and is used to treat the dust-laden exhaust gas discharged from the bypass waste heat boiler (5). A dust collector exhaust fan (7) is connected at its inlet to the outlet of the dust collector (6) and is used to transport the exhaust gas treated by the dust collector (6) out. A cooling fan (8) is connected at its inlet to the outlet of the dust collector exhaust fan (7) through a pipe and at its outlet to the grate cooler (9) in the kiln head workshop through a pipe. The exhaust gas discharged from the grate cooler (9) is reduced and chemically reacted in the high-temperature reducing environment of the kiln tail smoke chamber (1) and the preheater (10) to generate nitrogen.

2. The bypass venting exhaust gas treatment system according to claim 1, characterized in that, Also includes: A quenching fan (3) is connected to the quenching chamber (2) and delivers cooling air into the quenching chamber (2).

3. The bypass venting exhaust gas treatment system according to claim 1, characterized in that, A cold air valve is provided on the conveying pipe between the dust collector exhaust fan (7) and the inlet of the cooling fan (8).

4. The bypass venting exhaust gas treatment system according to claim 3, characterized in that, An electric butterfly valve is provided at the front end of the distribution pipe from the dust collector exhaust fan (7) to the grate cooler (9). The electric butterfly valve is configured to close when the bypass ventilation system is stopped and the firing system is running.

5. The bypass venting exhaust gas treatment system according to claim 1, characterized in that, The quench chamber (2), the cyclone (4), the bypass waste heat boiler (5), and the dust collector (6) are connected in sequence by high-temperature resistant pipes, and the dust collector exhaust fan (7) and the inlet of the cooling fan (8) are connected by a temperature and pressure resistant pipe.

Images