CN210197338U - Energy-saving oxygen-enriched combustion mixer for boiler - Google Patents
Energy-saving oxygen-enriched combustion mixer for boiler Download PDFInfo
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- CN210197338U CN210197338U CN201920979094.XU CN201920979094U CN210197338U CN 210197338 U CN210197338 U CN 210197338U CN 201920979094 U CN201920979094 U CN 201920979094U CN 210197338 U CN210197338 U CN 210197338U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to the technical field of boiler manufacturing, in particular to an energy-saving oxygen-enriched combustion mixer for a boiler, which is characterized by comprising a pure oxygen pipe, a regulating valve, a primary mixing device and a secondary mixing device, wherein the pure oxygen pipe is sequentially connected with the primary mixing device and the secondary mixing device, and the primary mixing device comprises an outer sleeve, an inner sleeve, a nozzle and an air pipe; the outer end of the air pipe is connected with a silencer; be equipped with shell, blade axle and blade among the secondary mixing arrangement, the epaxial spiral blade that is equipped with of blade, the one end opening part of shell corresponds inside the tip of blade axle, the blade axle passes through vaulting pole location with the shell inner wall and is connected. Compared with the prior art, the beneficial effects of the utility model are that: 1) the stable oxygen concentration of the supplied air can be ensured, the combustion is sufficient, and the circular economy mode of energy conservation, emission reduction and comprehensive utilization is achieved. 2) Can be used in the areas with low oxygen concentration such as plateau. 3) The oxygen concentration can be adjusted.
Description
Technical Field
The utility model relates to a boiler manufacture technical field especially relates to an energy-saving oxygen boosting burning blender for boiler.
Background
The boiler is an energy conversion device, the energy input to the boiler is chemical energy, electric energy and the like in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy. The boiler is a water container heated on fire, a furnace is a place where fuel is combusted, and the boiler comprises a boiler and a furnace. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people's life. After water enters the boiler, the boiler heating surface in the steam-water system transfers the absorbed heat to water, so that the water is heated into hot water with certain temperature and pressure or generated steam, and the hot water is led out for application. Meanwhile, the fuel is combusted to continuously release heat, the high-temperature flue gas generated by combustion transfers the heat to the heating surface of the boiler through heat transmission, the temperature of the high-temperature flue gas is gradually reduced, and the high-temperature flue gas is finally discharged from a chimney.
The oxygen-enriched combustion is performed by using oxygen-containing gas with the oxygen content (20.947%) higher than that of air, and is an efficient energy-saving combustion technology. In the glass industry,In the metallurgical industryAndengineering of heat energyHas application in the field. Compared with the common air combustion, the utility model has the advantages that: 1) height ofTemperature of flameAnddegree of blackness(ii) a 2) The combustion speed is accelerated, and the combustion safety is promoted. 3) Lower the ignition temperature of the fuel and reduce the burn-out time. 4) ReduceCoefficient of excess airAnd the smoke amount after combustion is reduced. 5) And other CO2Compared with the control technology, the method has competitiveness. 6) It is suitable for both new boiler and old boiler. The oxygen-enriched combustion has obvious energy-saving effect, effectively prolongs the furnace life, is beneficial to improving the yield and the quality of products and has outstanding environment-friendly effect.
The Chinese patent with application number 201410299109.X discloses an oxygen-enriched combustion device of a boiler, wherein the oxygen-enriched pulverized coal burner is a four-air-channel burner; compared with a three-air-channel combustor, the four-air-channel pulverized coal combustor increases central air, the design of the central air can stabilize the length and temperature of combustion flame, adjust the negative pressure of a central reflux area of jet flow, change the position and size of a high-temperature area at the head, promote the combustion of pulverized coal fixed carbon, and reduce O in the flame2Concentration, thereby reducing NOx production. The coal-fired boiler can solve the problems of low combustion efficiency, serious energy waste and overproof pollutant discharge of the conventional coal-fired boiler.
When the burner nozzle uses three-channel and four-channel burners, if the coal air adopts oxygen-enriched air, the combustion-supporting effect can be improved, but if the oxygen concentration in the furnace is further improved, the combustion-supporting effect can be further increased, and the coal can be further ensured to be fully combusted. However, if the air volume of the external air is too large, the oxygen-enriched air in the furnace can be diluted, and the combustion-supporting effect is influenced, so that the function of the oxygen-enriched adding mixer is very critical.
Disclosure of Invention
The utility model aims at providing an energy-saving oxygen boosting combustion mixer for boiler overcomes prior art's is not enough, mixes twice between the pure oxygen of high concentration and the air, and oxygen mixes with the air proportional mixing through mixing arrangement for the first time earlier, and the inside helical blade of rethread secondary mixing arrangement carries out the secondary and mixes the back, reaches given oxygen concentration, gets into the boiler forced draught blower, gets into a wind pipeline after the compression of boiler forced draught blower, and is combustion-supporting for the boiler combustion.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
an energy-saving oxygen-enriched combustion mixer for a boiler is characterized by comprising a pure oxygen pipe, a regulating valve, a primary mixing device and a secondary mixing device, wherein the pure oxygen pipe is sequentially connected with the primary mixing device and the secondary mixing device, the regulating valve is arranged on the pure oxygen pipe, the primary mixing device comprises an outer sleeve, an inner sleeve, a nozzle and an air pipe, flanges are respectively arranged at an air inlet end and an air outlet end of the outer sleeve, the inner sleeve is concentrically arranged in the outer sleeve, the air inlet end of the nozzle is connected to the inner side of the air inlet end flange of the outer sleeve, the outlet end of the nozzle is positioned in the end space of the inlet end of the inner sleeve, and the outlet end of the inner sleeve is; the air pipe is arranged on the primary mixing device and communicated with the interior of the primary mixing device; the outer end of the air pipe is connected with a silencer;
be equipped with shell, blade axle and blade among the secondary mixing device, the one end opening part of shell is connected with primary mixing device's export, the other end opening of shell is connected with boiler forced draught blower's air intake, be equipped with oxygen concentration sensor on the shell, be equipped with the blade axle between two parties in the shell, the epaxial spiral blade that is equipped with of blade, the one end opening part of shell corresponds inside the tip of blade axle, the blade axle passes through vaulting pole location with the shell inner wall and is connected.
In the primary mixing device, the outer diameter of the inner sleeve is in transition fit with the inner wall of the outer sleeve, the inner hole of the inner sleeve is sequentially provided with a vacuum chamber, an accelerating chamber and an expanding chamber from the air inlet end to the air outlet end, and the inner diameter D1 of the vacuum chamber is as follows: acceleration chamber inner diameter D2: the ratio of the expansion chamber inside diameter D3 was 1.5: 1: 1.5.
the ratio of the outer diameter of the pure oxygen pipe to the outer diameter of the outer sleeve is 1: 1.
The regulating valve is any one of a manual butterfly valve, an electric gate valve or a pneumatic butterfly valve.
The muffler is any one of a resistive muffler, a reactive muffler or an impedance composite muffler.
And an RS-485 bus and/or Profibus field bus digital signal transmission interface is arranged on the oxygen concentration detector.
And the inner wall of the inner sleeve and the surfaces of the blades are coated with sound attenuation material coatings.
Compared with the prior art, the beneficial effects of the utility model are that: 1) the high-concentration pure oxygen and the air are effectively mixed, so that the oxygen concentration in a primary air pipeline of the boiler is stable, the flame temperature of a combustion system is increased, coal is fully combusted, the coal consumption is reduced, the effects of saving coal and reducing cost are achieved, the smoke emission is reduced, and the circular economy mode of energy conservation, emission reduction and comprehensive utilization is achieved. 2) The device can be used in the regions with thin oxygen concentration such as plateaus and the like, and has good use effect. 3) Can adjust according to the oxygen concentration in the atmosphere, can enough guarantee boiler combustion system fully to burn, can avoid too high and improve manufacturing cost of oxygen concentration again, can also avoid too high causing the injury to the human body of oxygen concentration.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of the internal structure of the primary mixing device of the present invention.
In the figure: 1-shell, 2-pure oxygen pipe, 3-regulating valve, 4-primary mixing device, 5-secondary mixing device, 6-air pipe, 7-boiler blower, 8-primary air pipeline, 9-oxygen concentration sensor, 10-brace rod, 11-elbow, 12-outer sleeve, 13-inner sleeve, 14-air inlet flange, 15-air outlet flange, 16-nozzle, 17-flange, 18-vacuum chamber, 19-accelerating chamber, 20-expanding chamber, 21-blade shaft, 22-silencer and 23-blade.
Detailed Description
The preparation process of the present invention is further illustrated below with reference to the following examples:
in the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and fig. 2, which are schematic structural views of an embodiment of the oxygen-enriched combustion mixer for an energy-saving boiler of the present invention, comprising a pure oxygen pipe 2 and a regulating valve 3, primary mixing device 4 and secondary mixing device 5, pure oxygen pipe 2 is connected with primary mixing device 4 and secondary mixing device 5 in proper order, be equipped with governing valve 3 on the pure oxygen pipe 2, be equipped with shell 1 in the secondary mixing device 5, blade axle 21 and blade 23, the one end opening part of shell 1 is connected through elbow 11 with primary mixing device 4's export, the other end opening of shell 1 is connected with boiler forced draught blower 7's air intake, be equipped with oxygen concentration sensor 9 on the shell 1, be equipped with blade axle 21 between two parties in the shell 1, be equipped with spiral blade 23 on the blade axle 21, the one end opening part of shell 1 corresponds the tip of inside blade axle 21, blade axle 21 passes through vaulting pole 10 location with 1 inner wall of shell and is connected. The utility model discloses well pure oxygen is through mixing arrangement 4 and the preliminary mixing of air once, carries out the second through secondary mixing arrangement 5 again and mixes, then carries a wind pipeline 8 through boiler forced draught blower 7 in, provides the oxygen-enriched air for the boiler burning, and oxygen content scope control is at 23~ 32%.
The primary mixing device comprises an outer sleeve 12, an inner sleeve 13 and a nozzle 16, wherein a gas inlet end flange 14 and a gas outlet end flange 15 on the outer sleeve are respectively used for connecting a pure oxygen tube 2, the inner sleeve 13 is concentrically arranged in the outer sleeve 12, the gas inlet end of the nozzle 16 is connected to the inner side of the gas inlet end flange 14 of the outer sleeve 12, the outlet end of the nozzle 16 is positioned in the end space of the inlet end of the inner sleeve 13, the outlet end of the inner sleeve 13 is connected to the inner side of the gas outlet end flange 15 of the outer sleeve, the outer diameter of the inner sleeve 13 is in transition fit with the inner wall of the outer sleeve 12, the ratio of the outer diameter of the pure oxygen tube 2 to the diameter of the outer sleeve 12 is 1:1, the inner hole of the inner sleeve 13 is sequentially provided: acceleration chamber inner diameter D2: the ratio of the expansion chamber inside diameter D3 was 1.5: 1: 1.5. the air pipe 6 is arranged on the outer sleeve 12 and communicated with the interior of the primary mixing device 4; the outer end of the air tube 6 is a flange 17 for attachment of a muffler 22. The area between the air pipe 6 and the air inlet end of the inner sleeve 13 is vacuumized due to the change of the inner diameter of the inner sleeve 13, air is sucked in from the air pipe 6 and is mixed with pure oxygen, and the mixing ratio of the pure oxygen and the air is adjusted by the adjusting valve 3.
In the embodiment, the regulating valve 3 is any one of a manual butterfly valve, an electric gate valve, and a pneumatic butterfly valve. The muffler 22 is any one of a resistive muffler, preferably a resistive muffler, which primarily utilizes porous sound absorbing material to reduce noise, a reactive muffler, or a resistive composite muffler. When sound waves enter the resistive muffler, a part of sound energy is rubbed in pores of the porous material and converted into heat energy to be dissipated, so that the sound waves passing through the muffler are weakened.
In the embodiment, the oxygen concentration detector 9 is provided with an RS-485 bus and/or Profibus field bus digital signal transmission interface, and the oxygen concentration value can be transmitted to a control room. To prevent noise pollution, the inner wall of the inner sleeve 13 and the surface of the blade 23 are coated with a sound-deadening material.
The utility model can realize the sufficient and uniform mixing of the air inlet gas of the boiler blower, obtain the uniformly mixed oxygen-enriched air, improve the combustion efficiency of the boiler, adjust the flow of the high-pressure oxygen through the remote control adjusting valve, accurately control the combustion air-fuel ratio in the boiler, and realize the purposes of energy conservation and emission reduction; the mixer is simple in structure, convenient and reliable to use, and capable of reducing equipment maintenance time and cost and saving production cost.
The above-mentioned embodiments are only specific examples selected for the purpose of illustrating the objects, technical solutions and advantages of the present invention in detail, but should not limit the scope of the present invention, and all modifications, equivalent substitutions and improvements made without departing from the spirit and principles of the present invention should fall within the scope of the present invention.
Claims (7)
1. An energy-saving oxygen-enriched combustion mixer for a boiler is characterized by comprising a pure oxygen pipe, a regulating valve, a primary mixing device and a secondary mixing device, wherein the pure oxygen pipe is sequentially connected with the primary mixing device and the secondary mixing device, the regulating valve is arranged on the pure oxygen pipe, the primary mixing device comprises an outer sleeve, an inner sleeve, a nozzle and an air pipe, flanges are respectively arranged at an air inlet end and an air outlet end of the outer sleeve, the inner sleeve is concentrically arranged in the outer sleeve, the air inlet end of the nozzle is connected to the inner side of the air inlet end flange of the outer sleeve, the outlet end of the nozzle is positioned in the end space of the inlet end of the inner sleeve, and the outlet end of the inner sleeve is; the air pipe is arranged on the primary mixing device and communicated with the interior of the primary mixing device, and the outer end of the air pipe is connected with the silencer;
be equipped with shell, blade axle and blade among the secondary mixing device, the one end opening part of shell is connected with primary mixing device's export, the other end opening of shell is connected with boiler forced draught blower's air intake, be equipped with oxygen concentration sensor on the shell, be equipped with the blade axle between two parties in the shell, the epaxial spiral blade that is equipped with of blade, the one end opening part of shell corresponds inside the tip of blade axle, the blade axle passes through vaulting pole location with the shell inner wall and is connected.
2. An energy-saving oxycombustion mixer for boiler according to claim 1, characterized in that, in the primary mixing device, the outer diameter of the inner sleeve is in transition fit with the inner wall of the outer sleeve, the inner bore of the inner sleeve is sequentially a vacuum chamber, an acceleration chamber and an expansion chamber from the air inlet end to the air outlet end, the inner diameter of the vacuum chamber is D1: acceleration chamber inner diameter D2: the ratio of the expansion chamber inside diameter D3 was 1.5: 1: 1.5.
3. an oxycombustion mixer for an energy-saving boiler according to claim 1, characterized in that the ratio of the pure oxygen tube diameter to the outer diameter of the outer jacket tube is 1: 1.
4. An oxycombustion mixer for energy-saving boiler according to claim 1, characterized in that the adjusting valve is any one of a manual butterfly valve, an electric gate valve or a pneumatic butterfly valve.
5. An oxycombustion mixer for energy-saving boiler according to claim 1, characterized in that the muffler is any one of a resistive muffler, a reactive muffler or a resistive composite muffler.
6. An oxycombustion mixer for energy-saving boiler according to claim 1, characterized in that the oxygen concentration sensor is provided with RS-485 bus and/or Profibus fieldbus digital signal transmission interface.
7. An oxycombustion mixer for energy-saving boiler according to claim 1, wherein the inner liner inner wall and the surface of the blade are coated with a coating of sound attenuation material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979094.XU CN210197338U (en) | 2019-06-27 | 2019-06-27 | Energy-saving oxygen-enriched combustion mixer for boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979094.XU CN210197338U (en) | 2019-06-27 | 2019-06-27 | Energy-saving oxygen-enriched combustion mixer for boiler |
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| CN210197338U true CN210197338U (en) | 2020-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322144A (en) * | 2020-03-31 | 2020-06-23 | 广西玉柴机器股份有限公司 | Emission control method and device of equivalent-burning gas engine |
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2019
- 2019-06-27 CN CN201920979094.XU patent/CN210197338U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322144A (en) * | 2020-03-31 | 2020-06-23 | 广西玉柴机器股份有限公司 | Emission control method and device of equivalent-burning gas engine |
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