CN217559843U - CO waste gas treatment system - Google Patents

Abstract

The application relates to exhaust-gas treatment technical field especially relates to a CO exhaust-gas treatment system, includes: the combustion furnace comprises a combustion furnace and a plurality of burners communicated with a hearth of the combustion furnace, wherein the burners are sequentially arranged along the circumferential direction of the combustion furnace; the injection directions of the plurality of burners form a virtual tangent circle by taking the center of the hearth as the center of a circle. Based on above-mentioned structure can know, waste gas mixes back from a plurality of directions entering stove in through the combustor, forms the virtual tangent circle of certain diameter in the stove to rotation, the ascending fast flow of disturbance, in the short time, make the CO reaction in the waste gas complete, and then make tail gas up to standard, satisfy the environmental protection and discharge the requirement.

Description

CO waste gas treatment system

Technical Field

The application relates to the technical field of waste gas treatment, in particular to a CO waste gas treatment system.

Background

At present, in the production operation of producing reduced titanium by coal-based direct reduction, excessive reducing agent is generally added to ensure the reducing atmosphere in a kiln, so that the generated high-temperature tail gas contains a part of low-concentration CO, and the CO cannot be directly combusted due to low concentration (less than or equal to 5 percent) and is generally directly discharged. However, with the increasing environmental pollution in recent years, the environmental protection situation in China is becoming more severe, and the content of CO in the exhaust gas is also taken as a pollution factor and brought into the control range. Compared with the conventional mature treatment method for the conventional pollution factors (dust, sulfur, nitrogen and the like) in the waste gas, the low-concentration CO has no successful treatment device, and because the reduced titanium production industry is relatively small and numerous, the industry has no engineering precedent, and the excessive emission of the waste gas CO in the reduced titanium production process becomes a difficult problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a CO waste gas treatment system, and the problem that the CO emission of waste gas generated in the production process of reduced titanium exceeds the standard in the prior art is solved to a certain extent.

The application provides a CO exhaust treatment system, includes: the burner comprises a combustion furnace and a plurality of burners communicated with a hearth of the combustion furnace, wherein the burners are sequentially arranged along the circumferential direction of the combustion furnace;

the injection directions of the plurality of burners form a virtual tangent circle by taking the center of the hearth as the center of a circle.

In the above technical solution, the combustion furnace has a square cross section along the height direction thereof, the number of the burners is four, and the four burners are respectively disposed at the center positions of the four side portions of the rectangular structure and are biased to one side by 10cm to 40cm.

In any one of the above technical solutions, further, the burner includes a main body, and a natural gas introduction portion, a first air supplement portion, an exhaust gas introduction portion, and a second air supplement portion that are sequentially provided in a longitudinal direction of the main body;

wherein a first conveying channel, a second conveying channel and a third conveying channel which are sequentially separated are formed along the center of the main body towards the outside;

the natural gas introducing part is communicated with the first conveying channel; the first air supplement part is communicated with the second conveying channel; and the waste gas introducing part and the second air supplementing part are communicated with the third conveying channel.

In any one of the above technical solutions, further, the second air supply portion includes a duct portion, a distribution portion, and a plurality of delivery pipe portions; wherein the distribution portion is annular and extends along the circumferential direction of the main body;

the plurality of conveying pipe parts are arranged between the main body and the distribution part and are sequentially arranged along the circumferential direction of the main body; the distribution part is provided with an annular air delivery channel, and the guide opening part is communicated with the air delivery channel;

one end of any one conveying pipe part is communicated with the conveying channel of the distribution part, and the other end, opposite to the conveying pipe part, of any one conveying pipe part is communicated with the third conveying channel;

the conveying pipe part and the extending direction of the third conveying channel form an obtuse angle.

In any of the above technical solutions, further, the main body includes a first shell, a second shell and a third shell, which are sequentially sleeved together from inside to outside; wherein the interior of the first housing forms the first conveyance channel; the second conveying channel is formed between the second shell and the first shell; the third conveying channel is formed between the third shell and the second shell;

the main body further comprises an end cover, and the end cover covers the inlet ends, located on the same side, of the first shell, the second shell and the third shell.

In any of the above technical solutions, further, the burner further includes a swirl member, the swirl member includes a mounting body and a vane disposed along a circumferential direction of the mounting body, the mounting body is movably sleeved outside the second housing, and the vane is located in a third delivery channel formed between the second housing and the third housing.

In any of the above technical solutions, further, the combustor further includes an adjusting screw threadedly connected to the end cover, and one end of the adjusting screw extends into the third conveying passage through the end cover and is threadedly connected to the mounting body of the swirl member.

In any of the above technical solutions, further, the burner further includes a flame stabilizing disc disposed in the second conveying passage, and the flame stabilizing disc is formed with a plurality of vent holes;

the combustor also comprises a plurality of pipe fittings which are sequentially arranged along the periphery of the flame stabilizing disc; one end of any pipe fitting is communicated with the first conveying channel, the other end of any pipe fitting is sealed, and a plurality of through holes are formed in the side portion of any pipe fitting.

In any of the above technical solutions, further, a first regulating valve is disposed inside each of the first air supplement part and the second air supplement part;

a smoke component detector is arranged at the outlet end of the combustion furnace;

the CO waste gas treatment system further comprises a controller, and the controller is in communication connection with the first regulating valve and the smoke component detector respectively.

In any of the above technical solutions, further, the CO exhaust gas treatment system further includes a smoke exhaust housing, a temperature measurement component, and a cooling pipe; wherein the furnace is arranged in a vertical configuration; one end of the smoke exhaust shell is communicated with the outlet end of the combustion furnace, and the outlet end of the smoke exhaust shell is used for being communicated with the inlet end of the boiler;

the temperature measuring component is arranged at one end of the smoke exhaust shell close to the boiler, and the temperature measuring part of the temperature measuring component is positioned in the smoke exhaust shell;

one end of the cooling pipe fitting extends to the inside of the smoke exhaust shell, and the other end of the cooling pipe fitting extends to the outside of the smoke exhaust shell;

the one end of keeping away from of cooling pipe fitting the casing of discharging fume is provided with the second governing valve.

Compared with the prior art, the beneficial effect of this application is:

the working principle of the CO waste gas treatment system provided by the application is as follows: waste gas mixes the back through the combustor, gets into the stove from a plurality of directions, forms the virtual tangent circle of certain diameter in the stove to rotation, the ascending fast flow of disturbance make the CO reaction in the waste gas complete in the short time, and then make tail gas up to standard, satisfy the environmental protection and discharge the requirement.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a CO waste gas treatment system provided by an embodiment of the application;

FIG. 2 is a schematic view of another structure of a burner according to an embodiment of the present disclosure;

FIG. 3 isbase:Sub>A cross-sectional view taken along section A-A of FIG. 2;

FIG. 4 is a schematic structural diagram of a combustor provided by an embodiment of the present application;

FIG. 5 is a schematic view of another structure of a combustor provided in the embodiments of the present application;

fig. 6 is a schematic structural diagram of a combustor provided in the embodiment of the present application.

Reference numerals:

1-combustion furnace, 11-interface, 2-burner, 21-body, 211-first shell, 212-second shell, 213-third shell, 214-natural gas leading-in part, 215-first air supplement part, 216-waste gas leading-in part, 217-second air supplement part, 2171-leading-in part, 2172-distribution part, 2173-conveying pipe part, 218-end cover, 219-cyclone component, 220-adjusting screw, 221-flame stabilizing disc, 222-first conveying channel, 223-second conveying channel, 224-third conveying channel, 225-auxiliary mounting ring, 3-smoke exhaust shell, 4-temperature measuring component, 5-cooling pipe, 6-pipe, 7-boiler, 8-gas distributor and 9-ignition gun.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

A CO exhaust gas treatment system according to some embodiments of the present application is described below with reference to fig. 1 to 6.

Referring to fig. 1 to 3, embodiments of the present application provide a CO exhaust gas treatment system, particularly applicable to lower concentrations of CO (e.g., ≦ 5%), comprising: the combustion furnace 1 and a plurality of burners 2 communicated with a hearth of the combustion furnace 1 are arranged in sequence along the circumferential direction of the combustion furnace 1;

the injection directions of the plurality of burners 2 form a virtual tangential circle with the center of the furnace.

Based on the structure that above describes can know, waste gas mixes the back through combustor 2, gets into the stove from a plurality of directions, forms the virtual tangent circle of certain diameter in the stove to rotation, the ascending fast flow of disturbance make the CO reaction in the waste gas complete in the short time, and then make tail gas up to standard, satisfy the environmental protection and discharge the requirement.

Further, it is preferable that the combustion furnace 1 has a rectangular cross section in the height direction thereof as shown in fig. 1 and 3, and the number of burners 2 is four, and correspondingly, ports 11 corresponding to the four burners 2 are also provided at the center positions of the four side portions of the same cross section of the combustion furnace 1 in the height direction thereof and shifted to the right side by a predetermined distance (for example, shifted from the center positions of the four side portions to the right side by 10cm to 40cm at the same time, or shifted from the center positions of the four side portions to the left side by 10cm to 40cm at the same time), for communicating the burners 2.

According to the structure described above, after the exhaust gas is mixed by the burners 2, the exhaust gas enters the furnace from four directions, a virtual tangent circle with a certain diameter is formed in the furnace, and the exhaust gas is rotated and disturbed to flow upwards rapidly, so that the CO in the exhaust gas can be reacted completely in a short time, and therefore, under the condition that the complete reaction of the CO in the exhaust gas is ensured, a small number of burners 2 are adopted, which is beneficial to reducing the early investment cost and the later maintenance cost.

In this embodiment, preferably, as shown in fig. 4, the burner 2 includes a main body 21, and a natural gas introduction portion 214, a first air supplement portion 215, an exhaust gas introduction portion 216, and a second air supplement portion 217 which are provided in this order along the length direction of the main body 21;

wherein, a first conveying channel 222, a second conveying channel 223 and a third conveying channel 224 which are sequentially separated are formed along the center of the main body 21 towards the outside;

the natural gas introduction portion 214 communicates with the first transportation path 222; the first air supplement portion 215 communicates with the second conveying passage 223; the exhaust gas introduction portion 216 and the second air supplement portion 217 are both communicated with the third transfer passage 224.

As can be seen from the above-mentioned structure, the burner 2 provided in this embodiment adopts a special structural form of 3 channels and 2 times air supply, so as to improve the mixing effect of the gases, and increase the temperature of the exhaust gas to above 650 ℃ instantly to reach the reaction temperature of CO, compared with the prior art in which various gases enter the combustion furnace 1 from different directions around the combustion furnace 1.

In this embodiment, preferably, as shown in fig. 4, the second air replenishing portion 217 includes a guide port portion 2171, a distribution portion 2172, and a plurality of delivery pipe portions 2173; wherein the distribution portion 2172 is annular and extends along the circumferential direction of the body 21;

the plurality of delivery tube portions 2173 are provided between the main body 21 and the distribution portion 2172, and are sequentially provided along the circumferential direction of the main body 21; the distributing portion 2172 has an annular air conveyance passage, and the guide opening portion 2171 communicates with the air conveyance passage;

one end of either of the conveying pipe sections 2173 communicates with the conveying passage of the distributing section 2172, and the other opposite end of either of the conveying pipe sections 2173 communicates with the third conveying passage 224;

the conveying pipe portion 2173 forms an obtuse angle with the extending direction of the third conveying passage 224.

According to the above-described structure, the air supplement is obliquely cut into the third conveying channel 224 at an angle, and the air supplement flow direction is the same as the waste gas flow direction, so that the two are mixed more uniformly.

In this embodiment, preferably, as shown in fig. 4 to 6, the main body 21 includes a first housing 211, a second housing 212, and a third housing 213, which are sequentially sleeved together from inside to outside; wherein, the first housing 211 has a first conveying passage 222 formed therein; a second conveyance passage 223 is formed between the second housing 212 and the first housing 211; a third conveying passage 224 is formed between the third housing 213 and the second housing 212; the outer wall of the first housing 211 is formed with an auxiliary mounting ring 225 for abutting against a flange on the interface 11 of the furnace 1, which may be connected by fastening means such as bolts.

The main body 21 further includes an end cap 218, the end cap 218 covers the inlet ends of the first, second and third housings 211, 212 and 213 located on the same side, the outlet ends of the first, second and third housings 211, 212 and 213 are located at different positions, the third housing 213 is communicated with the combustion furnace 1, a certain space is formed between the outlet end of the second housing 212 and the combustion furnace 1, a certain space is also formed between the outlet end of the first housing 211 and the outlet end of the first housing 211, that is, the length of the third housing 213 is greater than that of the second housing 212, the length of the second housing 212 is greater than that of the first housing 211, and the space can be used for fully mixing the exhaust gas, the natural gas and the air; in addition, the end cap 218 is provided with an ignition gun 9, and an ignition portion of the ignition gun 9 is located in the second conveying passage 223.

Further, preferably, the first housing 211, the second housing 212 and the third housing 213 are all metal circular housings, especially the first housing 211, which may directly employ conventional steel pipes.

In this embodiment, preferably, as shown in fig. 4 and 5, the combustor 2 further includes a swirl member 219, the swirl member 219 includes a mounting body and vanes disposed along a circumferential direction of the mounting body, the mounting body is movably sleeved outside the second housing 212, and the vanes are located in a third delivery passage 224 formed between the second housing 212 and the third housing 213.

According to the above-described structure, the exhaust gas is introduced into the combustion furnace 1 through the rotation and disturbance of the plurality of rotary vanes, and the exhaust gas, the natural gas, and the additional wind are more sufficiently mixed.

Further, preferably, the rotary vane is formed of a plate having an inclination angle; the quantity of rotary vane is a plurality of, and a plurality of rotary vanes set up along the even interval of circumference of installation body.

In this embodiment, preferably, as shown in fig. 4, the combustor 2 further includes an adjustment screw 220 threadedly coupled to the end cover 218, one end of the adjustment screw 220 extending through the end cover 218 into the third delivery passage 224 and threadedly coupled to the mounting body of the swirl member 219.

According to the above-described structure, the swirl member 219 rotatably screwed to the adjusting screw 220 is forced to move along the length direction of the third transfer passage 224 by rotating the adjusting screw, and particularly, when the swirl member 219 moves toward the burner 1, the rotation and disturbance of the gas are increased, and when the swirl member 219 moves away from the burner 1, the rotation and disturbance of the gas are decreased, so as to satisfy different combustion requirements.

Further, it is preferable that the end of the adjusting screw 220 is formed with a handle for an operator to hold.

Further, it is preferable that the number of the adjusting screws 220 is two, and the adjusting screws are symmetrically distributed on two opposite sides of the second housing 212 in the horizontal plane, so as to ensure the smoothness of the swirl member 219 during the movement.

In this embodiment, preferably, as shown in fig. 4 and 5, the burner 2 further includes a flame stabilizing disc 221 disposed in the second transfer passage 223, the flame stabilizing disc 221 being formed with a plurality of vent holes;

the burner 2 further comprises a plurality of pipe fittings 6, and the plurality of pipe fittings 6 are sequentially arranged along the periphery of the flame stabilizing disc 221;

one end of any pipe fitting 6 is communicated with the first conveying passage 222 in the first housing 211, the other end of any pipe fitting 6 is sealed, and a plurality of through holes are formed in the side portion of any pipe fitting 6. It can be seen that the use of multiple pipes 6 to direct a portion of the natural gas to the second transfer passage 223 results in a more uniform mixing of the gases in each portion.

According to the above-described structure, the flame stabilizing disc 221 functions to stabilize the flow, so as to prevent the air in the second conveying passage 223 from being too large and to extinguish the flame.

Further, preferably, the flame stabilizing disc 221 is a disc-shaped structure, and a plurality of circular vent holes are formed in the flame stabilizing disc; flame stabilizing disk 221 may be snapped or welded to the outer wall of first housing 211.

In this embodiment, a first adjusting valve (not shown in the figure) is preferably arranged inside each of the first air supplement part 215 and the second air supplement part 217, and this first adjusting valve is preferably an electric adjusting valve and does not need to be adjusted by manpower;

a smoke component detector is arranged at the outlet end of the combustion furnace 1 and can detect the content of CO in the waste gas;

the CO waste gas treatment system further comprises a controller (not shown in the figure) which is in communication with the first regulating valve and the flue gas composition detector respectively, and the controller is a device commonly used in the prior art, and will not be described in detail herein.

According to the structure described above, the first regulating valve and the flue gas component detector realize the interlocking work, and the air supply quantity can be automatically regulated according to the CO content in the outlet waste gas, so that the automatic control is realized, and the CO content at the outlet can be ensured to be below 200 ppm.

In this embodiment, preferably, as shown in fig. 1 and fig. 2, the CO exhaust gas treatment system further includes a smoke evacuation housing 3, a temperature measuring member 4, and a temperature reduction pipe 5;

wherein, the combustion furnace 1 is arranged vertically, so that the carbon-containing dust in the waste gas is in a suspension posture, which is more beneficial to the combustion of solid fuel;

one end of the smoke exhaust shell 3 is communicated with the outlet end of the combustion furnace 1, and the outlet end of the smoke exhaust shell 3 is used for communicating with the inlet end of the boiler 7;

the temperature measuring component 4 is arranged at one end of the smoke exhaust shell 3 close to the boiler 7, and the temperature measuring part of the temperature measuring component 4 is positioned in the smoke exhaust shell 3, therefore, the outlet end of the combustion furnace 1 is communicated with the boiler 7 through the smoke exhaust shell 3, the inlet end of the combustion furnace 1 is communicated with the combustor 2, and all the combustors 2 are connected with the gas distributor 8 through pipelines;

one end of the cooling pipe fitting 5 extends to the inside of the smoke exhausting shell 3, and the other end of the cooling pipe fitting 5 extends to the outside of the smoke exhausting shell 3;

the end of the cooling pipe 5 far away from the smoke exhaust housing 3 is provided with a second regulating valve, and preferably, the second regulating valve and the temperature measuring member 4 are both in communication connection with the aforementioned controller, or are separately provided with a controller for separate control.

According to the structure described above, the low-calorific-value waste gas containing CO enters the combustion furnace 1 after being heated by the high-efficiency combustor 2, is subjected to strong disturbance and mixing in the furnace to enable the CO to be completely combusted, and enters the subsequent waste heat boiler 7 through the flue, namely the smoke exhaust shell 3, so as to recover heat energy.

The rear end of the flue is provided with a temperature measuring point which is interlocked with a second regulating valve on the cooling pipe fitting 5, and the temperature can be set to be automatically regulated, namely, when the measured temperature exceeds a preset value, the opening degree of a valve port is increased, and the cooling air flow is increased to meet the temperature requirement of the gas entering the boiler 7. It can be seen that the above structure forms a cooling and air supplying structure, so that the discharged gas can meet the temperature requirement of the boiler 7.

Further, preferably, the number of the temperature measuring components 4 is two, and the two temperature measuring components are symmetrically arranged on the two side portions of the smoke exhaust housing 3 in the horizontal plane, so as to average the detected temperature, thereby improving the accuracy of the detection result.

Further, preferably, the temperature measuring means 4 is a thermocouple, which is sensitive.

In conclusion, the CO waste gas treatment system provided by the application has the following structure and characteristics:

this CO exhaust treatment system is burning furnace 1 that also is the efficient including vertical burning furnace, a plurality of efficient combustors 2 and cooling benefit wind structure, wherein, a plurality of combustors 2's injection direction forms a virtual tangent circle with furnace's center, waste gas is through combustor 2 mixture, rapid heating up back, get into in the stove from a plurality of directions, form the virtual tangent circle of certain diameter in the stove, with rotatory, the ascending fast flow of disturbance, in the short time, make the CO reaction in the waste gas complete, and then make tail gas up to standard, satisfy the environmental protection and discharge the requirement.

The efficient combustor 2 adopts a special structural form of 3 channels and 2 times of air supplement, and compared with the prior art that various gases respectively enter the combustion furnace 1 from different directions around the combustion furnace 1, the efficient combustor improves the mixing effect of the gases, so that the temperature of waste gases is instantly raised to above 650 ℃, and the reaction temperature of CO is reached.

The first regulating valve and the smoke component detector are adopted to work in an interlocking manner, and then automatic control is regulated, so that the flow speed of the waste gas is stabilized in a reasonable range, the mixing and burning effects are ensured, and the CO content of an outlet can be ensured to be below 200 ppm.

The rear end of the flue is provided with a temperature measuring point which is interlocked with a second regulating valve on the cooling pipe fitting 5, and the temperature can be automatically regulated through temperature setting, namely when the measured temperature exceeds a preset value, the opening degree of a valve port is increased, and cooling air flow is increased, so that the temperature requirement of gas entering the boiler 7 is met.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A CO exhaust gas treatment system, comprising: the combustion furnace comprises a combustion furnace and a plurality of burners communicated with a hearth of the combustion furnace, wherein the burners are sequentially arranged along the circumferential direction of the combustion furnace;

and the injection directions of the plurality of burners form a virtual tangent circle by taking the center of the hearth as the center of a circle.

2. The CO off-gas treatment system according to claim 1, wherein a cross section of the combustion furnace in a height direction thereof has a rectangular structure, the number of the burners is four, and four of the burners are provided at central positions of four side portions of the rectangular structure, respectively, to be deviated to one side by 10cm to 40cm.

3. The CO off-gas treatment system according to claim 1, wherein the burner includes a main body, and a natural gas introduction portion, a first air supplement portion, an off-gas introduction portion, and a second air supplement portion that are provided in this order along a length direction of the main body;

wherein, a first conveying channel, a second conveying channel and a third conveying channel which are sequentially separated are formed along the center of the main body towards the outside;

the natural gas introducing part is communicated with the first conveying channel; the first air supplement part is communicated with the second conveying channel; and the waste gas leading-in part and the second air supplementing part are communicated with the third conveying channel.

4. The CO off-gas treatment system according to claim 3, wherein the second air supply portion includes a duct portion, a distribution portion, and a plurality of delivery pipe portions; wherein the distribution portion is annular and extends along the circumferential direction of the main body;

the plurality of conveying pipe parts are arranged between the main body and the distribution part and are sequentially arranged along the circumferential direction of the main body; the distribution part is provided with an annular air delivery channel, and the guide opening part is communicated with the air delivery channel;

one end of any one conveying pipe part is communicated with the conveying channel of the distribution part, and the other end, opposite to the conveying pipe part, of any one conveying pipe part is communicated with the third conveying channel;

the conveying pipe part and the extending direction of the third conveying channel form an obtuse angle.

5. The CO exhaust gas treatment system of claim 3, wherein the main body comprises a first shell, a second shell and a third shell which are sleeved together from inside to outside in sequence; wherein the interior of the first housing forms the first conveyance channel; the second conveying channel is formed between the second shell and the first shell; the third conveying channel is formed between the third shell and the second shell;

the main body further comprises an end cover, and the end cover covers inlet ends, located on the same side, of the first shell, the second shell and the third shell.

6. The CO exhaust gas treatment system of claim 5, wherein the burner further comprises a swirl member comprising a mounting body and a vane disposed along a circumference of the mounting body, the mounting body is movably sleeved outside the second housing, and the vane is located in a third delivery passage formed between the second housing and the third housing.

7. The CO offgas processing system of claim 6, wherein the combustor further includes an adjusting screw threadedly connected to the end cover, one end of the adjusting screw extending through the end cover into the third duct and threadedly connected to the mounting body of the swirl member.

8. The CO offgas processing system of claim 3 wherein the burner further comprises a flame stabilizing disk disposed within the second transfer passage, the flame stabilizing disk being formed with a plurality of vent holes;

the combustor also comprises a plurality of pipe fittings, and the plurality of pipe fittings are sequentially arranged along the periphery of the flame stabilizing disc; one end of any pipe fitting is communicated with the first conveying channel, the other end of any pipe fitting is sealed, and a plurality of through holes are formed in the side portion of any pipe fitting.

9. The CO exhaust gas treatment system according to claim 3, wherein a first regulating valve is provided inside each of the first air supply portion and the second air supply portion;

a smoke component detector is arranged at the outlet end of the combustion furnace;

the CO waste gas treatment system further comprises a controller, and the controller is in communication connection with the first regulating valve and the smoke component detector respectively.

10. The CO exhaust gas treatment system according to any one of claims 1 to 9, further comprising a smoke evacuation housing, a temperature measurement member, and a temperature reduction pipe; wherein the burner is arranged in a vertical configuration; one end of the smoke exhaust shell is communicated with the outlet end of the combustion furnace, and the outlet end of the smoke exhaust shell is used for being communicated with the inlet end of the boiler;

the temperature measuring component is arranged at one end of the smoke exhaust shell close to the boiler, and the temperature measuring part of the temperature measuring component is positioned in the smoke exhaust shell;

one end of the cooling pipe fitting extends to the interior of the smoke exhaust shell, and the other end of the cooling pipe fitting extends to the exterior of the smoke exhaust shell;

the one end of keeping away from of cooling pipe fitting the casing of discharging fume is provided with the second governing valve.

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