Carbon monoxide emission pre-treatment system

Abstract

The present application relates to a carbon monoxide emission pre-treatment system, comprising: a regenerative incinerator, an air intake pipe, an exhaust pipe and a waste heat recycling module; the regenerative incinerator is provided with: a combustion chamber and two or more regenerative chambers; the two or more regenerative chambers are connected in sequence through the combustion chamber; the air intake pipe is connected to the inlets of the two or more regenerative chambers, the outlets of the two or more regenerative chambers are all connected to the exhaust pipe, the first air outlet end of the exhaust pipe is connected to the waste heat recycling module, and the second air outlet end of the exhaust pipe is suitable for being connected to the chimney; the waste heat recycling module comprises: a waste heat boiler, a steam turbine, a generator and a high-temperature resistance wire; the high-temperature resistance wire is arranged in the combustion chamber of the regenerative incinerator, the first air outlet end of the exhaust pipe is connected to the flue gas inlet of the waste heat boiler, the steam outlet of the waste heat boiler is connected to the steam turbine, the steam turbine is connected to the generator, the generating end of the generator is electrically connected to the high-temperature resistance wire and the power grid, and is suitable for supplying power to the high-temperature resistance wire and the power grid respectively.

Description

Technical Field

[0001] The present application relates to the technical field of carbon monoxide treatment, and in particular to a carbon monoxide emission pre-treatment system. Background Art

[0002] As a method for treating carbon monoxide, RTO furnaces have been widely promoted and applied in some fields, especially when treating medium- and small-scale, high-concentration carbon monoxide gases. They have the characteristics of high efficiency and good stability. However, when burning high-concentration carbon monoxide in an RTO furnace, a large amount of heat energy is released. Usually, this high-temperature and high-heat gas is directly discharged to the outside, resulting in energy waste. Therefore, this application proposes a carbon monoxide emission pre-treatment system that can utilize the heat of the high-temperature and high-heat flue gas generated when the RTO furnace burns high-concentration carbon monoxide. Summary of the Invention

[0003] In view of this, the present application proposes a carbon monoxide emission pre-treatment system.

[0004] According to one aspect of the present application, a carbon monoxide emission pre-treatment system is provided, comprising: a regenerative incinerator, an air intake pipe, an exhaust pipe, and a waste heat recycling module;

[0005] The regenerative incinerator is provided with: a combustion chamber and two or more regenerative chambers; the two or more regenerative chambers are connected in sequence through the combustion chamber;

[0006] The air inlet pipe is connected to the inlets of two or more heat storage chambers, and an air inlet valve is provided on the connecting pipe between each heat storage chamber and the air inlet pipe; a first fan is provided on the air inlet pipe, and the first fan is adapted to blow the waste gas to be treated into the heat storage chamber through the air inlet valve;

[0007] The outlets of more than two heat storage chambers are connected to the exhaust pipe, and an exhaust valve is provided on the connecting pipe between each heat storage chamber and the exhaust pipe; the first exhaust end of the exhaust pipe is connected to the waste heat recycling module, and the second exhaust end of the exhaust pipe is suitable for connecting to the chimney;

[0008] The waste heat recycling module includes: a waste heat boiler, a steam turbine, a generator and a high-temperature resistance wire; the high-temperature resistance wire is arranged in the combustion chamber of the heat storage incinerator, the first air outlet end of the exhaust pipe is connected to the flue gas inlet of the waste heat boiler, the steam outlet of the waste heat boiler is connected to the steam turbine, which is suitable for sending the hot steam generated by the waste heat boiler into the steam turbine, the steam turbine is connected to the generator, which is suitable for driving the generator to generate electricity, and the generating end of the generator is electrically connected to the high-temperature resistance wire and the power grid, which is suitable for supplying power to the high-temperature resistance wire and the power grid respectively.

[0009] In a possible implementation, it further includes: a filter;

[0010] The filter is arranged on the air intake pipe.

[0011] In a possible implementation, the device further includes: a first valve;

[0012] The first valve is disposed on the air intake pipe, and the first valve and the filter are arranged in sequence along the direction of gas flow in the air intake pipe.

[0013] In a possible implementation, the method further includes: a second fan;

[0014] The second fan is arranged on the exhaust pipe, and the second fan is suitable for sucking the treated waste gas to be processed into the waste heat boiler and the chimney through the outlet valve.

[0015] In a possible implementation, the device further includes: a second valve;

[0016] The second valve is disposed on the air inlet pipe, and the second fan and the second valve are arranged in sequence along the direction of gas flow in the exhaust pipe.

[0017] In a possible implementation, the third exhaust end of the exhaust pipe is connected to the inlets of two or more heat storage chambers, and a return air valve is provided on the connecting pipeline between each heat storage chamber and the third exhaust end of the exhaust pipe.

[0018] In a possible implementation, the third exhaust end of the exhaust pipe is located between the second fan and the second valve.

[0019] Effective effect: The regenerative incinerator is suitable for oxidative combustion of waste gas to be treated. The exhaust pipe sends the treated flue gas obtained after combustion in the regenerative incinerator into the waste heat boiler of the waste heat recycling module. The flue gas temperature of the treated flue gas reaches about 800℃. The treated flue gas enters the waste heat boiler and is suitable for heating the water in the waste heat boiler. The waste heat boiler can produce hot steam to supply other work sections by recycling the temperature of the treated flue gas. Then the hot steam is sent from the waste heat boiler to the steam turbine. The steam turbine is a rotary power mechanical equipment that can convert thermal energy into mechanical energy. After the high-temperature gas enters the steam turbine, it generates an impact force on the high-speed rotating turbine blades, causing the multi-stage blades to rotate. The thermal energy is converted into mechanical energy and drives the rotor of the coaxially connected generator to rotate, thereby realizing the power generation of the generator. The first generating end of the generator is electrically connected to the high-temperature resistance wire in the thermal storage incinerator. This part of the electricity will maintain the high-temperature resistance wire in the thermal storage incinerator to work, so that it provides energy for the continuous cycle combustion of the thermal storage incinerator. The second generating end of the generator is connected to the power grid, which is suitable for using excess electricity through another path to enter the factory's internal power grid. This application uses a waste heat recycling module to reuse the treated flue gas emitted when burning the waste gas to be treated multiple times, which can save the consumption of natural gas energy. The system has high reliability and low maintenance. It eliminates the safety hazards of the storage and use of supplementary energy such as natural gas. The excess electricity can also be directly used by other systems without causing energy waste.

[0020] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

[0022] Figure 1 A connection diagram showing a carbon monoxide emission pre-treatment system according to an embodiment of the present application;

[0023] Figure 2 A side view of a removal device according to an embodiment of the present application is shown;

[0024] Figure 3 A front view of the first heating plate and the second heating plate according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0025] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0026] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0028] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0029] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0030] Figure 1 A connection diagram showing a carbon monoxide emission pre-treatment system according to an embodiment of the present application; Figure 2 A side view of a removal device according to an embodiment of the present application is shown; Figure 3 FIG2 shows a front view of the first heating plate 230 and the second heating plate 240 of the embodiment of the present application. Figure 1As shown, the carbon monoxide emission pre-treatment system includes: a regenerative incinerator, an air intake pipe 100, an exhaust pipe 200 and a waste heat recycling module; the regenerative incinerator is provided with: a combustion chamber 400 and two or more regenerative chambers; the two or more regenerative chambers are connected in sequence through the combustion chamber 400; the air intake pipe 100 is connected to the inlet of the two or more regenerative chambers, and an air intake valve is provided on the connecting pipe between each regenerative chamber and the air intake pipe 100; a first fan 120 is provided on the air intake pipe 100, and the first fan 120 is suitable for blowing the waste gas to be treated into the regenerative chamber through the air intake valve; the outlets of the two or more regenerative chambers are connected to the exhaust pipe 200, and an air outlet is provided on the connecting pipe between each regenerative chamber and the exhaust pipe 200 Valve; the first air outlet end of the exhaust pipe 200 is connected to the waste heat recycling module, and the second air outlet end of the exhaust pipe 200 is suitable for connecting to the chimney 300; the waste heat recycling module includes: a waste heat boiler 500, a steam turbine 600, a generator 700 and a high-temperature resistance wire 810; the first air outlet end of the exhaust pipe 200 is connected to the waste heat boiler 500, and the steam outlet of the waste heat boiler 500 is connected to the steam turbine 600, which is suitable for sending the hot steam generated by the waste heat boiler 500 into the steam turbine 600, and the steam turbine 600 is connected to the generator 700, which is suitable for driving the generator 700 to generate electricity, and the power generation end of the generator 700 is electrically connected to the high-temperature resistance wire 810 and the power grid, which is suitable for supplying power to the high-temperature resistance wire 810 and the power grid respectively.

[0031] Here, it should be noted that the regenerative thermal incinerator (RTO furnace) is suitable for burning the waste gas to be treated, wherein the regenerative thermal incinerator is provided with: a combustion chamber 400 and two or more regenerative chambers; the waste gas to be treated is first sent into the regenerative chamber, which is suitable for preheating the waste gas to be treated, and then the waste gas to be treated is introduced into the combustion chamber 400, and the combustion chamber 400 burns the waste gas to be treated. Under the action of combustion, the waste gas to be treated is fully mixed with air and an oxidation reaction occurs, thereby converting carbon monoxide into harmless oxygen. The carbon dioxide, after being burned, is ultimately sent out of the regenerative incinerator. The inlet end of the inlet pipe 100 is adapted to introduce the untreated waste gas to be treated. The exhaust end of the inlet pipe 100 communicates with multiple regenerative chambers to deliver the untreated waste gas into the regenerative chambers. After the combustion process is complete, the treated flue gas enters the exhaust pipe 200. The first outlet end of the exhaust pipe 200 is adapted to deliver the majority of the treated flue gas into the waste heat recycling module, while the second outlet end of the exhaust pipe 200 is adapted to discharge the excess treated flue gas from the chimney 300. The exhaust pipe 200 delivers the treated flue gas into the waste heat boiler 500 of the waste heat recycling module. The treated flue gas reaches a flue gas temperature of approximately 800°C. The treated flue gas enters the waste heat boiler 500 and is adapted to heat the water within the waste heat boiler 500. The waste heat boiler 500 recycles the temperature of the treated flue gas to produce hot water or steam for use in other processes. The high-temperature gas is then sent from the waste heat boiler 500 to the steam turbine 600, which is a rotating power mechanical equipment that can convert thermal energy into mechanical energy; and can drive the generator 700 to generate electricity; the first power generation end of the generator 700 is electrically connected to the high-temperature resistance wire 810 in the thermal storage incinerator. This part of the electricity will maintain the operation of the high-temperature resistance wire 810 in the thermal storage incinerator, so that it provides energy for the continuous cycle combustion of the thermal storage incinerator. The second power generation end of the generator 700 is electrically connected to the power grid, which is suitable for transferring excess electricity to the factory's internal power grid through another path.

[0032] This application sets up a waste heat recycling module to make multiple uses of the treated flue gas emitted when burning the waste gas to be treated. First, the water in the waste heat boiler 500 is heated by heat exchange to achieve the first waste heat utilization. Then the high-temperature steam enters the turbine 600, and the turbine 600 generates electricity for the generator 700 to achieve the second waste heat utilization. Since the thermal storage incinerator requires an ignition source during operation, this ignition source needs to continuously consume natural gas and other energy sources; this application utilizes high-temperature gas to enable the electricity generated by the generator 700 to provide electrical energy to the high-temperature resistance wire 810 in the thermal storage incinerator. The high-temperature resistance wire 810 can serve as an ignition source to maintain the combustion of the thermal storage incinerator. The thermal storage incinerator can maintain continuous and stable operation without the need for external energy. The excess electricity generated by the generator 700 can also provide other electricity for the manufacturer. Therefore, while realizing the recycling of waste heat, this application can also save the consumption of natural gas energy. The system has high reliability and requires less inspection and maintenance. It eliminates the safety hazards in the storage and use of supplementary energy such as natural gas. The excess electricity can also be directly used by other systems without causing energy waste.

[0033] It should be noted that the regenerative thermal incinerator (RTO furnace) uses existing technology and equipment. The regenerator of the regenerative thermal incinerator can heat the temperature of the waste gas to be treated to about 680°C; the combustion chamber 400 treats the temperature of the waste gas to be treated at about 900-1100°C.

[0034] The steam turbine 600 and the motor 700 are the main equipment. After the high-temperature gas enters the steam turbine 600, it generates impact force on the turbine blades, causing the multi-stage blades to rotate, driving the main shaft equipped with blades to rotate, and converting thermal energy into mechanical energy; the main shaft is coaxially connected to the rotor of the generator 700 to drive the rotor of the generator 700 to rotate, thereby realizing the power generation of the generator 700; further, the motor 700 adopts a medium-voltage AC generator, and the output end of the motor 700 outputs electrical energy to the high-temperature resistance wire 810 and the power grid through a rectifier transformer.

[0035] The waste heat boiler 500 and the steam turbine 600 are connected via a high-temperature, high-pressure, sealed pipeline; the hot steam released by the waste heat boiler 500 is transported to the steam turbine 600 via the high-temperature, high-pressure, sealed pipeline.

[0036] High-temperature resistance wire 810 is installed at the top of combustion chamber 400. It's essential for maintaining system circulation and must remain powered up during system operation. High-temperature flue gas is essential for maintaining normal operation. Carbon monoxide combustion requires a temperature of 800°C, so resistance wire 810 must be maintained at approximately 900°C to maintain a stable ignition point.

[0037] It should be noted that the motor 700 can also power the system fan in the thermal storage incinerator.

[0038] In one possible implementation, the waste heat recovery module also includes a starting power supply 800. The output of starting power supply 800 is electrically connected to a high-temperature resistance wire 810 and a system fan within the regenerative thermal incinerator. It should be noted that, except for the initial startup, when external power is required, no additional power is required at all other times. During initial startup, starting power supply 800 provides 380V power to the high-temperature resistance wire 810 and the system fan, activating them. After startup, motor 700 then supplies power to the high-temperature resistance wire 810 and the system fan.

[0039] In one possible implementation, a filter 130 is further included; filter 130 is disposed on the intake pipe 100. It should be noted that filter 130 is adapted to remove impurities from the waste gas to be treated within the intake pipe 100 before it enters the regenerative thermal incinerator, thereby preventing solid impurities from entering the regenerative thermal incinerator and potentially damaging it and affecting normal combustion operations. Furthermore, filter 130 is a screen-type boiler filter.

[0040] In one possible implementation, the system further includes a first valve 110 . The first valve 110 is disposed on the intake pipe 100 , and the first valve 110 and the filter 130 are sequentially arranged along the direction of gas flow within the intake pipe 100 . It should be noted that the first valve 110 is adapted to open and close the intake pipe 100 at any time, thereby facilitating control of the flow of the exhaust gas to be treated.

[0041] In a possible implementation, the system further includes: a first fan 120; the first fan 120 is disposed on the air inlet pipe 100, and the first fan 120 is adapted to blow the waste gas to be treated into the heat storage chamber through the air inlet valve; Figure 1 As shown, the blowing end of the first fan 120 is connected to one end of the heat storage chamber toward the air inlet pipe 100, so that the air in the air inlet pipe 100 can be blown into the heat storage chamber. Furthermore, the first fan 120 is a centrifugal fan.

[0042] In a possible implementation, there are three heat storage chambers, namely a first heat storage chamber 410, a second heat storage chamber 420, and a third heat storage chamber 430; Figure 1As shown, the tops of the three regenerators are connected to the combustion chamber 400. Inlet ports are provided on the sidewalls of the three regenerators. The air intake pipe 100 is connected to the inlet ports of each of the three regenerators. A first air intake valve 411 is provided on the pipeline connecting the air intake pipe 100 to the first regenerator 410, a second air intake valve 421 is provided on the pipeline connecting the air intake pipe 100 to the second regenerator 420, and a third air intake valve 431 is provided on the pipeline connecting the air intake pipe 100 to the third regenerator 430. The independent provision of the air intake valves for the three regenerators allows for the opening and closing of the three regenerators to be controlled at any time, thereby enabling the specific regenerator into which the exhaust gas to be treated flows to be controlled at any time according to the heating process.

[0043] In one possible implementation, outlets are provided on the side walls of each of the three regenerators, and exhaust pipes 200 are connected to the outlets of each of the three regenerators. A first outlet valve 413 is provided on the pipe connecting the exhaust pipe 200 to the outlet of the first regenerator 410, a second outlet valve 423 is provided on the pipe connecting the exhaust pipe 200 to the outlet of the second regenerator 420, and a third outlet valve 433 is provided on the pipe connecting the exhaust pipe 200 to the outlet of the third regenerator 430. The separate provision of the outlet valves for the three regenerators allows for the opening and closing of the three regenerators to be controlled at any time, thereby enabling the specific regenerator from which the treated flue gas flows to be controlled according to the heating process.

[0044] In one possible implementation, the second fan 220 is further included; the second fan 220 is disposed on the exhaust pipe 200, with the blowing side of the second fan 220 facing the chimney 300, and the second fan 220 is adapted to blow part of the processed flue gas toward the chimney 300. Furthermore, the second fan 220 is a centrifugal fan.

[0045] In one possible implementation, the system further includes a second valve 210 disposed on the air inlet pipe 100, with the second fan 220 and the second valve 210 arranged sequentially along the direction of gas flow within the exhaust pipe 200. The second valve 210 is adapted to open and close the exhaust pipe 200 at any time, thereby controlling the flow of treated flue gas to the chimney 300.

[0046] In one possible implementation, it also includes: a first bypass pipe; one end of the first bypass pipe is connected to the filter 130, and the other end of the first bypass pipe is connected to the air inlet end of the second fan 220, and a bypass valve 131 is provided on the first bypass pipe; when the system is completed and no longer processes the flue gas, the bypass valve 131 is opened and the first fan 120 is turned off at the same time; at this time, the remaining flue gas in the air inlet pipe 100 directly enters the first bypass pipe from the filter 130, flows through the bypass valve 131 to the second fan 220, and is blown out to the chimney 300 by the second fan 220 for direct discharge.

[0047] In one possible implementation, it also includes: a second bypass pipe 710, one end of the second bypass pipe 710 is connected to the chamber of the steam turbine 600, and the other end of the second bypass pipe 200 is connected to the exhaust pipe 200. The second bypass pipe 200 is set so that when the waste heat boiler 500 or the steam turbine 600 fails, the flue gas is directly discharged to the exhaust pipe 200 through the second bypass pipe 710 in a timely manner without affecting the normal operation of the original project system.

[0048] In one possible implementation, it also includes: a removal device, which is arranged in the exhaust pipe 200. It should be noted that the regenerative incinerator burns the high-concentration waste gas to be treated and then discharges it into the exhaust pipe 200. The treated flue gas in the exhaust pipe 200 will inevitably contain a lower concentration of carbon monoxide. Since the chimney 300 will directly release a part of the treated flue gas to the outside, in order to remove the low-concentration carbon monoxide in this part of the gas and avoid the related hazards caused by direct emission of carbon monoxide, a removal device is set in the exhaust pipe 200 as the last pre-emission treatment link.

[0049] In one possible implementation, the removal device includes: a first heating plate 230 and a second heating plate 240 arranged adjacent to each other, the first heating plate 230 and the second heating plate 240 are both arranged in the exhaust pipe 200, the shapes of the first heating plate 230 and the second heating plate 240 are matched with the internal end face of the exhaust pipe 200, and the plane where the first heating plate 230 is located and the plane where the second heating plate 240 is located are both perpendicular to the length direction of the exhaust pipe 200; this arrangement allows the first heating plate 230 and the second heating plate 240 to completely cover the end face of the exhaust pipe 200, so as to improve the comprehensiveness of carbon monoxide removal.

[0050] Preferably, the removal device is arranged at the air inlet front end of the second fan 200 to ensure that the gas flowing through the second fan 220 is the purest.

[0051] Preferably, the distance between the first heating plate 230 and the second heating plate 240 ranges from 1000 mm to 1200 mm.

[0052] Furthermore, the first heating plate 230 includes: a first mounting frame 231 and two or more first heating wires 232, the first mounting frame 231 is suitable for being fixedly connected to the inner wall of the exhaust pipe 200; the two or more first heating wires 232 are arranged in sequence in the first mounting frame 231, and the body length directions of the two or more first heating wires 232 are parallel to each other, and a first gap of the same width is provided between any two adjacent first heating wires 232.

[0053] Furthermore, the second heating plate 240 includes: a second mounting frame 241 and two or more second heating wires 242, the second mounting frame 241 is suitable for being fixedly connected to the inner wall of the exhaust pipe 200; the two or more second heating wires 242 are arranged in sequence in the second mounting frame 241, and the body length directions of the two or more second heating wires 242 are parallel to each other, and a second gap of the same width is provided between any two adjacent second heating wires 242.

[0054] Furthermore, the first heating wire 232 and the second heating wire 242 are both made of tungsten alloy wire.

[0055] In one possible implementation, the width of each second heating wire 242 is the same as the width of the first gap, and the width of each first heating wire 232 is the same as the width of the second gap, and when the first mounting frame 231 and the second mounting frame 241 are both installed in the exhaust pipe 200, each first heating wire 232 on the first mounting frame 231 is opposite to each second gap on the second mounting frame 241, and similarly, each second heating wire 242 on the second mounting frame 241 is opposite to each first gap on the first mounting frame 231; the sum of the areas of all first heating wires 232 and all second heating wires 242 is equal to the inner end surface area of ​​the exhaust pipe 200, so that all first heating wires 232 and all second heating wires 242 fully cover the entire flow area of ​​the flue gas; such an arrangement ensures that the treated flue gas can circulate while allowing the gas flowing through the removal device to be fully and evenly heated.

[0056] The electric control system 250 is adapted to heat the first heating wire 232 and the second heating wire 242 to a carbon monoxide combustion temperature (above 650° C.) so that the residual carbon monoxide in the high-temperature gas can be oxidized into carbon dioxide, thereby removing carbon monoxide from the high-temperature gas.

[0057] Furthermore, the first installation frame 231 and the second installation frame 241 are both disc-shaped, and the diameters of the first heating plate 230 and the second heating plate 240 match the inner diameter of the exhaust pipe 200 .

[0058] In one possible implementation, the third exhaust end of the exhaust pipe 200 is connected to the inlets of two or more heat storage chambers, and a return air valve is provided on the connecting pipe between each heat storage chamber and the third exhaust end of the exhaust pipe 200. Furthermore, the third exhaust end of the exhaust pipe 200 is connected to the inlets of two or more heat storage chambers via a return air pipe 900. Figure 1As shown, one end of the return air pipe 900 is connected to the third exhaust end of the exhaust pipe 200, and the other end of the return air pipe 900 is connected to the inlet of the three regenerators. A first return air valve 412 is provided on the pipeline connecting the return air pipe 900 to the first regenerator 410, a second return air valve 422 is provided on the pipeline connecting the return air pipe 900 to the second regenerator 420, and a third return air valve 432 is provided on the pipeline connecting the return air pipe 900 to the third regenerator 430. It should be noted that when the system is first started or just started, the internal flue gas volume is relatively low. To avoid insufficient flue gas volume, the return air pipe 900 is provided so that the discharged treated flue gas can be returned to the combustion chamber incinerator through the return air pipe 900 for heating and combustion. This also avoids the low temperature in the combustion incinerator during initial startup, which causes carbon monoxide to be discharged before reaching the ignition point. Preferably, the third exhaust end of the exhaust pipe 200 is located between the second fan 220 and the second valve 210.

[0059] In one possible implementation, a third valve 910 is provided on the return air pipe 900 and is disposed close to the exhaust pipe 200 . It should be noted that the third valve 910 is adapted to control the overall on-off of the return air pipe 900 at any time.

[0060] The process flow of burning carbon monoxide in a regenerative incinerator is described as follows:

[0061] First, the waste gas with high concentration to be treated is sent into the air inlet pipe 100, and after the impurities are removed by the filter 130, it is sent to the regenerative incinerator through the first fan 120 for combustion treatment;

[0062] Phase 1: The first air inlet valve 411 is opened, the second air inlet valve 421 is closed, and the third air inlet valve 431 is closed; the first air outlet valve 413 is closed, the second air outlet valve 423 is opened, and the third air outlet valve 433 is closed; the waste gas to be treated enters the first regenerator 410, is preheated, and then enters the combustion chamber 400 for combustion. At this time, the treated flue gas remaining in the third regenerator 430 is blown back to the combustion chamber 400 for incineration. The treated flue gas is discharged into the exhaust pipe 200 through the second regenerator 420. At this time, the ceramic regenerator in the second regenerator 420 is heated to a high temperature (for preheating the waste gas to be treated in the next phase);

[0063] Second stage: close the first air inlet valve 411, open the second air inlet valve 421, and close the third air inlet valve 431; close the first air outlet valve 413, close the second air outlet valve 423, and open the third air outlet valve 433; the waste gas to be treated enters the second regenerator 420 for preheating, and then enters the combustion chamber 400 for combustion. At this time, the treated flue gas remaining in the first regenerator 410 is blown back to the combustion chamber 400 for incineration, and the treated flue gas is discharged through the third regenerator 430. At the same time, the ceramic heat storage element in the third regenerator 430 is heated (for preheating the waste gas to be treated in the next stage);

[0064] The third stage: the first air inlet valve 411 is closed, the second air inlet valve 421 is closed, and the third air inlet valve 431 is opened; the first air outlet valve 413 is opened, the second air outlet valve 423 is closed, and the third air outlet valve 433 is closed; the waste gas to be treated enters the third heat storage chamber 430 to be preheated, and then enters the combustion chamber 400 for combustion, so that the organic matter is oxidized and decomposed into harmless CO2 and H2O; the treated flue gas remaining in the second heat storage chamber 420 is blown back to the combustion chamber 400 for incineration treatment, and the treated flue gas is discharged to the exhaust pipe 200 through the first heat storage chamber 410. At the same time, the ceramic heat storage body in the first heat storage chamber 410 is heated accordingly (for preheating the waste gas to be treated in the next stage).

[0065] It should be noted that after each stage is completed, the treated flue gas remaining in the heat storage chamber for exhaust is blown back to the combustion chamber 400 for incineration in two ways. One is to open the return air valve corresponding to the heat storage chamber, so that the treated flue gas to be discharged from the chimney 300 enters the heat storage chamber through the return air pipe 900, and the treated flue gas remaining in the heat storage chamber is blown into the combustion chamber. It should be noted that after each stage is completed, the amount of treated flue gas remaining in the heat storage chamber for exhaust is small, so the opening time of the return air valve should not be too long; the other way is that a small amount of high-temperature gas in the combustion chamber blows the residual gas back into the intake pipe and enters the heat storage chamber of the next stage together with the exhaust gas to be treated.

[0066] Since the waste gas to be treated has been preheated to 680° in the regenerator, it only needs to be slightly heated when entering the combustion chamber to reach the oxidation temperature (if the waste gas concentration is high enough, no heating is required during combustion and oxidation, and the heat released by the oxidation and decomposition of organic matter can maintain the reaction). It should be noted that the treatment time of the first, second and third stages is the same, and the treatment time ranges from 10 minutes to 20 minutes.

[0067] The regenerative incinerator operates in this cycle: the waste gas to be treated enters the first regenerator 410, is discharged from the second regenerator 420, and is back-flushed and purged in the third regenerator 430. The waste gas to be treated enters the second regenerator 420, is discharged from the third regenerator 430, and is back-flushed and purged in the first regenerator 410. The waste gas to be treated enters the third regenerator 430, is discharged from the first regenerator 410, and is back-flushed and purged in the second regenerator 420. This cycle continues, constantly switching between high-temperature flue gas discharges from different regenerators. Because the combustion of carbon monoxide in the regenerative incinerator is an exothermic reaction, the temperature of the treated flue gas discharged from the regenerators will reach approximately 800°C.

[0068] A processing capacity of 350,000 m 3 / h Carbon monoxide concentration is 15000mg / m 3 For example, the regenerative incinerator only needs one cycle to burn a certain mass (350000m 3 ) high concentration (15000mg / m 3 ) The carbon monoxide gas is burned completely; and the carbon monoxide combustion rate is above 99%. The carbon monoxide concentration of the high-temperature flue gas discharged from the regenerative incinerator into the exhaust pipe 200 can be reduced to 100mg / m 3 ; and the high temperature flue gas volume in the exhaust pipe 200 is as high as 20000m 3 / h, the generator 700 can generate about 500KW of electricity per hour, of which 10KW is used to power the high-temperature resistance wire 810; the system fan and other power consumption is about 100KW; the remaining power can be sent to the owner's internal power grid.

[0069] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. Carbon monoxide emission pre-treatment system, characterized in that: include: Regenerative incinerator, air intake pipe, exhaust pipe and waste heat recycling module; The regenerative incinerator is provided with: a combustion chamber and two or more regenerative chambers; the two or more regenerative chambers are sequentially connected through the combustion chamber; The air inlet pipe is connected to the inlets of two or more of the heat storage chambers, and an air inlet valve is provided on the connecting pipe between each of the heat storage chambers and the air inlet pipe; a first fan is provided on the air inlet pipe, and the first fan is adapted to blow the exhaust gas to be treated into the heat storage chamber through the air inlet valve; The outlets of two or more of the heat storage chambers are connected to the exhaust pipe, and an exhaust valve is provided on the connecting pipe between each of the heat storage chambers and the exhaust pipe; the first exhaust end of the exhaust pipe is connected to the waste heat recycling module, and the second exhaust end of the exhaust pipe is suitable for connecting to the chimney; The waste heat recycling module includes: a waste heat boiler, a steam turbine, a generator and a high-temperature resistance wire; the high-temperature resistance wire is arranged in the combustion chamber of the thermal storage incinerator, and the high-temperature resistance wire is arranged at the top of the combustion chamber, the first gas outlet end of the exhaust pipe is connected to the flue gas inlet of the waste heat boiler, the steam outlet of the waste heat boiler is connected to the steam turbine, which is suitable for feeding the hot steam generated by the waste heat boiler into the steam turbine, the steam turbine is connected to the generator, which is suitable for driving the generator to generate electricity, and the power generation end of the generator is electrically connected to the high-temperature resistance wire and the power grid, which is suitable for supplying power to the high-temperature resistance wire and the power grid respectively; Also included: a removal device; the removal device includes: a first heating plate and a second heating plate arranged adjacent to each other, the first heating plate and the second heating plate are both arranged in the exhaust pipe; The first heating plate includes: a first installation frame and two or more first heating wires, wherein the two or more first heating wires are sequentially arranged in the first installation frame, and a first gap of the same width is provided between any two adjacent first heating wires; The second heating plate includes: a second mounting frame and two or more second heating wires, wherein the two or more second heating wires are sequentially arranged in the second mounting frame, and a second gap of the same width is provided between any two adjacent second heating wires; Each of the first heating wires on the first installation frame is opposite to each of the second gaps on the second installation frame, and each of the second heating wires on the second installation frame is opposite to each of the first gaps on the first installation frame; It also includes a bypass pipe, one end of which is communicated with the chamber of the steam turbine, and the other end of which is communicated with the exhaust pipe.

2. The carbon monoxide emission pre-treatment system according to claim 1, characterized in that: Also includes; filters; The filter is arranged on the air intake pipe.

3. The carbon monoxide emission pre-treatment system according to claim 2, characterized in that: Also included: a first valve; The first valve is disposed on the air intake pipe, and the first valve and the filter are arranged in sequence along the direction of gas flow in the air intake pipe.

4. The carbon monoxide emission pre-treatment system according to claim 1, characterized in that: Also includes: Second fan; The second fan is arranged on the exhaust pipe, and the second fan is suitable for sucking the treated flue gas into the waste heat boiler and the chimney through the outlet valve.

5. The carbon monoxide emission pre-treatment system according to claim 4, characterized in that: Also included: a second valve; The second valve is disposed on the air inlet pipe, and the second fan and the second valve are arranged in sequence along the direction of gas flow in the exhaust pipe.

6. The carbon monoxide emission pre-treatment system according to claim 5, wherein the third exhaust end of the exhaust pipe is connected to the inlets of two or more heat storage chambers, and a return air valve is provided on the connecting pipeline between each heat storage chamber and the third exhaust end of the exhaust pipe.

7. The carbon monoxide emission pre-treatment system according to claim 6, characterized in that: The third exhaust end of the exhaust pipe is located between the second fan and the second valve.

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