Pure oxygen burner for flue gas treatment and flue gas treatment system
By designing an integrated pure oxygen burner in an adiabatic incinerator, using the combined structure of internal and external flue gas channels and oxygen channels, the problems of complex structure and uneven temperature of the adiabatic incinerator are solved, and low-cost and efficient toxic flue gas are achieved. deal with.
Patent Information
- Application Number
- CN202420208523.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-01-29
Smart Images
Figure CN222230528U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of toxic and harmful flue gas treatment, in particular to a pure oxygen burner and a flue gas treatment system for flue gas treatment. Background Art
[0002] In the production process of waste incineration, petrochemical, biopharmaceutical, printing and dyeing textile and other industries, various hazardous wastes are generally sent to incinerators for incineration. However, the flue gas after incineration sometimes contains a large amount of toxic and harmful substances, such as dioxins, heavy metals, etc. This part of toxic flue gas needs further treatment before it can be discharged. The current main treatment method is to send the flue gas to an adiabatic incinerator for reburning. According to the requirements of relevant standards, the flue gas is generally heated to above 1100℃ and the residence time is greater than 2 seconds.
[0003] The structure of existing adiabatic incinerators is that holes are opened at appropriate positions of the adiabatic furnace body to send toxic flue gas into the furnace, and an air-assisted fuel oil or gas burner is installed in the furnace to heat the flue gas to a specified temperature. Since a flue gas inlet is separately provided in the adiabatic furnace body, the number of holes needs to be increased, and the length of the furnace body needs to be increased, which not only leads to a complex structure and increased investment costs, but also affects the temperature in the furnace and the insulation effect. In addition, the burner uses air-assisted combustion, and the nitrogen in the air will not only increase the final flue gas emissions, but also lead to an increase in thermal nitrogen oxides, which increases energy consumption and creates new pollutant emissions. However, if a pure oxygen burner is used, due to the high intensity and low convection of pure oxygen combustion, it is very easy to cause uneven temperature field in the furnace, with high combustion temperature at the nozzle, concentrated high temperature area, and uneven heating. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a pure oxygen burner and a flue gas treatment system for flue gas treatment, integrating the inlet pipe of the flue gas to be treated with the burner, reducing the number of openings in the furnace body, and mixing part of the flue gas to be treated with pure oxygen in advance as a combustion aid, thereby reducing the emission of thermal nitrogen oxides, avoiding excessively high temperature at the nozzle, and making the temperature field in the furnace more uniform.
[0005] The utility model provides a pure oxygen burner for flue gas treatment, comprising a fuel channel, an oxygen channel, an inner flue gas channel, an outer flue gas channel and an ignition device which are sequentially sleeved from the inside to the outside; the fuel channel passes through the oxygen outlet of the oxygen channel and extends to the flue gas outlet of the inner flue gas channel; the oxygen outlet of the oxygen channel is arranged in the inner flue gas channel; the air inlets of the inner flue gas channel and the outer flue gas channel are both supplied with flue gas to be treated, and the smoke outlet ports are flush with each other; the ignition device can ignite the fuel sprayed from the fuel channel.
[0006] In the above-mentioned pure oxygen burner for flue gas treatment, by integrating the inner flue gas channel and the outer flue gas channel on the burner, the flue gas to be treated can enter the adiabatic incinerator through the burner. The adiabatic incinerator body does not need to have additional flue gas inlet holes, which simplifies the furnace body structure, improves the insulation effect in the furnace, and while meeting the flue gas residence time, the height of the incinerator body can be shortened, reducing investment costs.
[0007] Moreover, two independent channels are provided through the inner flue gas channel and the outer flue gas channel to divert the flue gas to be treated, and the oxygen outlet of the oxygen channel and the fuel outlet of the fuel channel are arranged at intervals in the inner flue gas channel, so that part of the flue gas entering the inner flue gas channel is first mixed with the oxygen ejected from the oxygen channel, and then flows through the fuel outlet of the fuel channel for combustion support, that is, the air used for combustion support is replaced with oxygen-enriched flue gas after the flue gas is mixed with pure oxygen, thereby reducing the emission of thermal nitrogen oxides, and at the same time, the flue gas volume is also reduced, and energy consumption is reduced; and pure oxygen is mixed with the flue gas, and the oxygen concentration is reduced, which can avoid the phenomenon of high combustion temperature at the nozzle, concentrated high temperature area, and uneven heating, prevent the burner nozzle from being burned at high temperature, and extend the service life. In addition, another part of the flue gas entering the outer flue gas channel will also flow through the flame of the fuel channel nozzle, and then burn, so that all the flue gas will be treated at high temperature, and the treatment effect is good.
[0008] As an improvement of the pure oxygen burner for flue gas treatment of the utility model, one end of the inner flue gas channel is sealed by an end plate, and the other end is a flue gas outlet; an inner smoke inlet channel is arranged on the side of the inner smoke gas channel, and an inner damper is arranged inside the inner smoke inlet channel.
[0009] Through the end plate design, the internal smoke channel is used as the core supporting component of the entire burner structure, and the structural integration design is ingenious. By adjusting the opening of the internal air door, the amount of smoke in the internal smoke channel can be adjusted, thereby controlling the mixing degree of pure oxygen and smoke.
[0010] Furthermore, the oxygen channel extends from the outside of the inner flue gas channel through the end plate to the inside of the end plate; the non-oxygen outlet end of the oxygen channel is closed, and an oxygen inlet channel is provided on one side of the main body located outside the inner flue gas channel. Oxygen concentrations of 95% to 100% can be considered pure oxygen, and the oxygen channel continuously supplies pure oxygen.
[0011] Furthermore, the fuel channel passes through the non-oxygen outlet end of the oxygen channel to form an oxygen inlet.
[0012] Furthermore, the non-smoke outlet end of the external smoke channel is closed, and an external smoke inlet channel is arranged on the side of the main body; the external smoke channel is arranged on the side of the internal smoke inlet channel away from the end plate, and an external air door is arranged inside the external smoke inlet channel.
[0013] Furthermore, the ignition device includes a fire detection sleeve and an ignition gun sleeve, both of which pass through the end plate from the outside of the inner smoke channel and extend to the smoke outlet of the inner smoke channel; a flame detection device is arranged in the fire detection sleeve, and an ignition device is arranged in the ignition gun sleeve.
[0014] As another improvement of the pure oxygen burner for flue gas treatment of the utility model, the flue gas outlets of the inner flue gas channel and the outer flue gas channel are both of a gradually contracting bell-mouth structure. The contraction-shaped structure can increase the nozzle speed, improve the combustion intensity and the toxic flue gas treatment effect, and prevent flashback.
[0015] As another improvement of the pure oxygen burner for flue gas treatment of the utility model, cyclones are respectively arranged at the outlets of the oxygen channel, the inner flue gas channel and the outer flue gas channel.
[0016] The cyclone in the oxygen channel can make the pure oxygen flow enter the flue gas in a rotating manner, disturbing the mixing process, making the oxygen-rich flue gas mixed with the flue gas and pure oxygen more uniform, thereby making the toxic flue gas combustion more complete. When the burner is working, the cyclone in the inner and outer flue gas channels can draw in high-temperature flue gas, fully mix the high and low temperature flue gas, ensure stable combustion, and prevent flameout.
[0017] As another improvement of the pure oxygen burner for flue gas treatment of the utility model, the fuel channel, the oxygen channel, the inner flue gas channel and the outer flue gas channel are all straight tube channels with simple structure, easy manufacturing and low cost.
[0018] The utility model also provides a flue gas treatment system based on the above-mentioned pure oxygen burner for flue gas treatment, including the above-mentioned pure oxygen burner for flue gas treatment, and also including a furnace body; a mounting flange is provided on the side wall of the outer flue gas channel, and the mounting flange is fixed on the wall of the furnace body, so that the flue gas outlets of the inner flue gas channel and the outer flue gas channel are both located inside the furnace body.
[0019] Furthermore, the external smoke inlet channel is located outside the furnace body.
[0020] Furthermore, the pure oxygen burner for flue gas treatment is installed on the top wall of the furnace body.
[0021] In summary, the use of the above-mentioned pure oxygen burner and flue gas treatment system for flue gas treatment can reduce the number of openings in the furnace body, optimize the furnace body structure, and reduce the emission of thermal nitrogen oxides, avoid excessive temperature at the nozzle, and make the temperature field in the furnace more uniform. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In the attached picture:
[0023] Figure 1 It is a schematic diagram of the overall cutaway structure of the pure oxygen burner used for flue gas treatment of the utility model.
[0024] Figure 2 It is an overall top view of the pure oxygen burner used for flue gas treatment of the utility model.
[0025] Figure 3 for Figure 1 A partial enlarged view of .
[0026] Figure 4 It is a structural schematic diagram of the flue gas treatment system of the present utility model.
[0027] In the figure, 1. fuel channel; 2. oxygen channel; 21. oxygen inlet channel; 3. inner flue gas channel; 31. end plate; 32. inner smoke inlet channel; 33. inner air damper; 4. outer flue gas channel; 41. outer smoke inlet channel; 42. outer air damper; 43. mounting flange; 5. ignition device; 51. fire detection sleeve; 52. ignition gun sleeve; 6. cyclone; 7. furnace body. DETAILED DESCRIPTION
[0028] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation modes is used to help understand the present invention, but does not constitute a limitation of the present invention.
[0029] Example 1
[0030] Figure 1-3 The utility model shows a pure oxygen burner for flue gas treatment. Figure 1 and Figure 2 As shown, the pure oxygen burner for flue gas treatment includes a fuel channel 1, an oxygen channel 2, an inner flue gas channel 3, an outer flue gas channel 4 and an ignition device 5 which are sequentially arranged from the inside to the outside; the fuel channel 1 passes through the oxygen outlet of the oxygen channel 2 and extends to the flue gas outlet of the inner flue gas channel 3; the oxygen outlet of the oxygen channel 2 is arranged in the inner flue gas channel 3; the air inlets of the inner flue gas channel 3 and the outer flue gas channel 4 are both supplied with flue gas to be treated, and the smoke outlet ports are flush with each other; the ignition device 5 can ignite the fuel sprayed from the fuel channel 1.
[0031] Optionally, one end of the inner smoke channel 3 is sealed by an end plate 31, and the other end is a smoke outlet. An inner smoke inlet channel 32 is provided on the side of the inner smoke channel 3, and an inner damper 33 is provided inside the inner smoke inlet channel 32. The inner damper 33 can adjust the opening, and then adjust the air intake, so that the oxygen content of the mixed oxygen-enriched flue gas in the inner smoke channel 3 can be controlled at about 25% to 35%, which is used for supporting the combustion of fuel oil or gas. The inner smoke inlet channel 32 can adopt a tubular structure and be arranged in a direction perpendicular to the axis of the tubular inner smoke channel 3.
[0032] Optionally, the oxygen channel 2 extends from the outside of the inner flue gas channel 3 through the end plate 31 and into the inner side of the end plate 31; the non-oxygen outlet end of the oxygen channel 2 is closed, and an oxygen inlet channel 21 is provided on one side of the main body located outside the inner flue gas channel 3. The two ends of the oxygen channel 2 are respectively located on the inner and outer sides of the inner flue gas channel 3, which is convenient for arranging the oxygen inlet channel 21, which continuously supplies pure oxygen combustion aid, and can adopt a tubular structure and be arranged obliquely with the tubular oxygen channel 2.
[0033] Optionally, the fuel channel 1 passes through the non-oxygen outlet end of the oxygen channel 2 to form an oxygen inlet. Fuel oil or fuel gas can be sprayed out of the fuel channel 1, such as Figure 3 As shown, the distance C2 between the outlet of the fuel channel 1 and the nozzle end of the inner smoke channel 3 is 80 to 150 mm, and the inlet end is located outside the inner smoke channel 3.
[0034] Optionally, the non-smoke outlet end of the external smoke channel 4 is closed, and an external smoke inlet channel 41 is provided on the side of the main body. The external smoke channel 4 is provided on the side of the internal smoke inlet channel 32 away from the end plate 31, and the structure is compact and reasonable. An external damper 42 is provided inside the external smoke inlet channel 41 to adjust the smoke volume.
[0035] Optionally, the ignition device 5 includes a fire detection sleeve 51 and an ignition gun sleeve 52, both of which are extended from the outside of the inner smoke channel 3, through the end plate 31, and to the smoke outlet of the inner smoke channel 3. The fire detection sleeve 51 is provided with a flame detection device, such as a detection probe, etc., to detect whether there is a flame; the ignition gun sleeve 52 is provided with an ignition device, such as an ignition gun, etc., which can perform ignition.
[0036] Optional, such as Figure 3 As shown, the smoke outlets of the inner smoke channel 3 and the outer smoke channel 4 are both of a gradually contracting bell-mouth structure. The contraction-shaped structure can increase the nozzle velocity, improve the combustion intensity and the toxic smoke treatment effect, and prevent backfire. The angles a and b formed by the inclination are both 10 to 30 degrees.
[0037] Optionally, cyclones 6 are respectively provided at the outlets of the oxygen channel 2 , the inner flue gas channel 3 and the outer flue gas channel 4 .
[0038] The airflow passing through the cyclone 6 can generate a rotating jet. The cyclone 6 of the oxygen channel 2 can make the pure oxygen airflow enter the flue gas in a rotating manner, disturb the mixing process, make the oxygen-enriched flue gas mixed with the flue gas and pure oxygen more uniform, and thus make the toxic flue gas burn more fully. When the burner is working, the cyclone 6 of the inner flue gas channel 3 and the outer flue gas channel 4 can suck in high-temperature flue gas, fully mix the high and low temperature flue gases, ensure stable combustion, and prevent flameout. Figure 3 As shown, the distance C1 between the cyclone 6 of the inner flue gas channel 3 and the nozzle end of the inner flue gas channel 3 is 150-300 mm.
[0039] Optionally, the fuel channel 1, the oxygen channel 2, the inner smoke channel 3 and the outer smoke channel 4 are all straight tube channels, which have a simple structure, are easy to manufacture and have low cost.
[0040] When in use, first supply the corresponding gas in the fuel channel 1 and the oxygen channel 2, start the ignition device to ignite the flame at the outlet of the fuel channel 1, and verify whether the ignition is successful through the flame detection device; then introduce the flue gas to be treated into the inner flue gas channel 3 and the outer flue gas channel 4; then adjust the opening of the inner air damper 33 according to the oxygen supply rate of the fuel channel 1 to control the oxygen content of the mixed oxygen-enriched flue gas in the inner flue gas channel 3 to a set ratio, for example, about 25% to 35%; finally, control the outer air damper 42 so that the flue gas to be treated can be synchronously introduced into the inner flue gas channel 3 and the outer flue gas channel 4 roughly according to the designed ratio, for example, 1:1.
[0041] like Figure 4 As shown, the utility model provides a flue gas treatment system based on the above-mentioned pure oxygen burner for flue gas treatment, including the above-mentioned pure oxygen burner for flue gas treatment, and also including a furnace body 7; a mounting flange 43 is provided on the side wall of the outer flue gas channel 4, and the mounting flange 43 is fixed on the wall of the furnace body 7, so that the flue gas outlets of the inner flue gas channel 3 and the outer flue gas channel 4 are both located inside the furnace body 7.
[0042] Optionally, the external smoke inlet channel 41 is located outside the furnace body 7. The internal smoke inlet channel 32, the end plate 31, the inlet of the fuel channel 1, and the inlet of the oxygen channel 2 are all located outside the furnace body 7.
[0043] Optionally, the pure oxygen burner for flue gas treatment is installed on the top wall of the furnace body 7.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit its protection scope. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the utility model, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the utility model, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the utility model.
Claims
1. A pure oxygen burner for flue gas treatment, characterized in that: The invention comprises a fuel channel (1), an oxygen channel (2), an inner smoke channel (3), an outer smoke channel (4) and an ignition device (5) which are sequentially arranged from the inside to the outside; the fuel channel (1) passes through the oxygen outlet of the oxygen channel (2) and extends to the smoke outlet of the inner smoke channel (3); the oxygen outlet of the oxygen channel (2) is arranged in the inner smoke channel (3); the air inlets of the inner smoke channel (3) and the outer smoke channel (4) are both supplied with smoke to be treated, and the smoke outlet ports are flush with each other; the ignition device (5) can ignite the fuel sprayed from the fuel channel (1).
2. A pure oxygen burner for flue gas treatment according to claim 1, characterized in that: One end of the inner smoke channel (3) is sealed by an end plate (31), and the other end is a smoke outlet; an inner smoke inlet channel (32) is provided on the side of the inner smoke channel (3), and an inner damper (33) is provided inside the inner smoke inlet channel (32).
3. A pure oxygen burner for flue gas treatment according to claim 2, characterized in that: The oxygen channel (2) extends from the outside of the inner smoke channel (3), through the end plate (31), and into the inside of the end plate (31); the non-oxygen outlet end of the oxygen channel (2) is closed, and an oxygen inlet channel (21) is provided on one side of the main body located outside the inner smoke channel (3).
4. A pure oxygen burner for flue gas treatment according to claim 3, characterized in that: The fuel channel (1) passes through the non-oxygen outlet end of the oxygen channel (2) to form an oxygen inlet.
5. A pure oxygen burner for flue gas treatment according to claim 2, characterized in that: The non-smoke outlet end of the external smoke channel (4) is closed, and an external smoke inlet channel (41) is provided on the side of the main body; the external smoke channel (4) is provided on a side of the internal smoke inlet channel (32) away from the end plate (31), and an external damper (42) is provided inside the external smoke inlet channel (41).
6. A pure oxygen burner for flue gas treatment according to claim 2, characterized in that: The ignition device (5) comprises a fire detection sleeve (51) and an ignition gun sleeve (52), wherein the fire detection sleeve (51) and the ignition gun sleeve (52) are both extended from the outside of the inner smoke channel (3), through the end plate (31), and to the smoke outlet of the inner smoke channel (3); a flame detection device is arranged in the fire detection sleeve (51), and an ignition device is arranged in the ignition gun sleeve (52).
7. A pure oxygen burner for flue gas treatment according to claim 1, characterized in that: The smoke outlets of the inner smoke channel (3) and the outer smoke channel (4) are both of a tapered bell-mouth structure.
8. The pure oxygen burner for flue gas treatment according to claim 1, characterized in that: A cyclone (6) is provided at the outlets of the oxygen channel (2), the inner smoke channel (3) and the outer smoke channel (4), respectively.
9. A pure oxygen burner for flue gas treatment according to claim 1, characterized in that: The fuel channel (1), the oxygen channel (2), the inner smoke channel (3) and the outer smoke channel (4) are all straight tube channels.
10. A flue gas treatment system, characterized in that: It comprises a pure oxygen burner for flue gas treatment as described in any one of claims 1 to 9, and also comprises a furnace body (7); a mounting flange (43) is provided on the side wall of the outer flue gas channel (4), and the mounting flange (43) is fixed on the wall of the furnace body (7), so that the flue gas outlets of the inner flue gas channel (3) and the outer flue gas channel (4) are both located inside the furnace body (7).