CN204358710U - Fire coal boiler fume backflow aftercombustion device - Google Patents
Fire coal boiler fume backflow aftercombustion device Download PDFInfo
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- CN204358710U CN204358710U CN201420689805.7U CN201420689805U CN204358710U CN 204358710 U CN204358710 U CN 204358710U CN 201420689805 U CN201420689805 U CN 201420689805U CN 204358710 U CN204358710 U CN 204358710U
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Abstract
The utility model discloses a kind of fire coal boiler fume backflow aftercombustion device, comprise boiler combustion device, exhaust apparatus, return duct, backflow blower fan and secondary wind inleting tube, wherein, described secondary wind inleting tube is communicated with the sidewall of described boiler combustion device, described exhaust apparatus is communicated with described boiler combustion device, and described secondary wind inleting tube is communicated with described exhaust apparatus by described return duct.During use, discharge from exhaust apparatus after producing from boiler combustion device with the tail flue gas of a large amount of waste heat, part tail flue gas is drawn in return duct by backflow blower fan from exhaust apparatus, and be sent in secondary wind inleting tube, directly boiler secondary air is supplemented, reduce the waste of heat, also dilute oxygen concentration so simultaneously, effectively can reduce the generation of NOx, and because tail flue gas self is with suitable temperature, without the need to heating it, reduce the waste of heat, save the energy of heating part, indirectly reduce the consumption of coal.
Description
Technical field
The utility model relates to smoke backflow technical field, particularly a kind of fire coal boiler fume backflow aftercombustion device.
Background technology
Boiler is a kind of energy conversion, and the energy to boiler input has the forms such as the heat energy of chemical energy in fuel, electric energy, high-temperature flue gas, and through boiler conversion, outwards exports steam, high-temperature water or the organic heat carrier with certain heat energy.
Wherein, coal-burning boiler is when burning, and tail flue gas can take away a large amount of waste heats, cause the waste of heat, meanwhile, also need secondary air to add new air, and the temperature of new air is lower than boiler internal temperature, so can absorbs a lot of heat, cause the waste of heat equally.
Therefore, how providing a kind of fire coal boiler fume backflow aftercombustion device, to reduce the waste of heat, is the current technical issues that need to address of those skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of fire coal boiler fume backflow aftercombustion device, to reduce the waste of heat.
For solving the problems of the technologies described above, the utility model provides following scheme:
A kind of fire coal boiler fume backflow aftercombustion device, comprise boiler combustion device, exhaust apparatus, return duct, backflow blower fan and secondary wind inleting tube, wherein, described secondary wind inleting tube is communicated with the sidewall of described boiler combustion device, described exhaust apparatus is communicated with described boiler combustion device, and described secondary wind inleting tube is communicated with described exhaust apparatus by described return duct.
Preferably, above-mentioned exhaust apparatus is provided with impurity removing apparatus, the connectivity part of described return duct and described exhaust apparatus is positioned at the rear of described impurity removing apparatus.
Preferably, above-mentioned impurity removing apparatus comprises electric dust collector.
Preferably, above-mentioned impurity removing apparatus comprises denitration desulfurizer.
Preferably, above-mentioned return duct is provided with flowmeter.
Preferably, above-mentioned return duct and described secondary wind inleting tube are respectively arranged with oxygen content measurement mechanism.
Preferably, above-mentioned fire coal boiler fume backflow aftercombustion device also comprises the scattered control system be connected with described oxygen content measurement mechanism.
Above-mentioned fire coal boiler fume backflow aftercombustion device provided by the utility model, comprise boiler combustion device, exhaust apparatus, return duct, backflow blower fan and secondary wind inleting tube, wherein, described secondary wind inleting tube is communicated with the sidewall of described boiler combustion device, described exhaust apparatus is communicated with described boiler combustion device, and described secondary wind inleting tube is communicated with described exhaust apparatus by described return duct.During use, discharge from exhaust apparatus after producing from boiler combustion device with the tail flue gas of a large amount of waste heat, part tail flue gas is drawn in return duct by backflow blower fan from exhaust apparatus, and be sent in secondary wind inleting tube, directly boiler secondary air is supplemented, reduce the waste of heat, also dilute oxygen concentration so simultaneously, effectively can reduce the generation of NOx, coal dust and wind fully mix, reduce the generation of boiler coke, and because tail flue gas self is with suitable temperature, without the need to heating it, reduce the waste of heat, save the energy of heating part, indirectly reduce the consumption of coal.
Accompanying drawing explanation
The structural representation of the fire coal boiler fume backflow aftercombustion device that Fig. 1 provides for the utility model embodiment.
In upper Fig. 1:
Boiler combustion device 1, exhaust apparatus 2, impurity removing apparatus 3, backflow blower fan 4, return duct 5, flowmeter 6, oxygen content measurement mechanism 7, secondary wind inleting tube 8.
Detailed description of the invention
In order to make those skilled in the art understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 1, the structural representation of the fire coal boiler fume backflow aftercombustion device that Fig. 1 provides for the utility model embodiment.
The fire coal boiler fume backflow aftercombustion device that the utility model embodiment provides, comprise boiler combustion device 1, exhaust apparatus 2, return duct 5, backflow blower fan 4 and secondary wind inleting tube 8, wherein, secondary wind inleting tube 8 is communicated with the sidewall of boiler combustion device 1, exhaust apparatus 2 is communicated with boiler combustion device 1, and secondary wind inleting tube 8 is communicated with exhaust apparatus 2 by return duct 5.During use, discharge from exhaust apparatus 2 after producing from boiler combustion device 1 with the tail flue gas of a large amount of waste heat, part tail flue gas is drawn in return duct 5 by backflow blower fan 4 from exhaust apparatus 2, and be sent in secondary wind inleting tube 8, respectively on boiler, mix with Secondary Air after the secondary air register of middle level, directly boiler secondary air is supplemented, reduce the waste of heat, also dilute oxygen concentration so simultaneously, effectively can reduce the generation of NOx, coal dust and wind fully mix, reduce the generation of boiler coke, and because tail flue gas self is with suitable temperature, without the need to heating it, reduce the waste of heat, save the energy of heating part, indirectly reduce the consumption of coal.
The effect of the fire coal boiler fume backflow aftercombustion device that the utility model embodiment provides: solve the rear produced problem of boiler low NO transformation; 1, when ensureing hypoxemia low-temperature burning, increasing and to air quantity, coal dust and wind fully being mixed, reduce the generation of boiler coke.2, the waste heat of flue gas is utilized to reduce the waste of heat.3, improve the efficiency of combustion of the rear boiler of low NO transformation.
Particularly after current low NO transformation, because main combustion zone needs hypoxemia low-temperature burning, air quantity of giving now will reduce accordingly, and reduce to after air quantity, during boiler combustion, wind mixes just uneven with coal dust, easy generation coking and reduction boiler combustion efficiency, in order to head it off, how can while increasing be to air quantity, and not increase oxygen content be the problem that should solve, the fire coal boiler fume backflow aftercombustion device that the utility model embodiment provides can solve under the prerequisite increasing and do not cause oxygen content to rise to air quantity, the waste heat of flue gas can also be utilized, carry out heating to wind, improve boiler combustion efficiency and the generation reducing coking.
In order to optimize such scheme further, exhaust apparatus 2 is provided with impurity removing apparatus 3, return duct 5 is positioned at the rear of impurity removing apparatus 3 with the connectivity part of exhaust apparatus 2.Use being drawn in return duct 5 by backflow blower fan 4 again after tail flue gas removal of contamination, concrete, impurity removing apparatus 3 comprises electric dust collector, denitration desulfurizer can also be comprised or both include, the stove that backflow blower fan 4 is smoked is through denitration desulfurization and electric precipitation process, low oxygen content gas, do not participate in stove combustion, and because inner flue gas of the stove amount increases, to raising boiler horizontal gas pass and back-end ductwork convection heat transfer' heat-transfer by convection favourable, reduce NOx discharge simultaneously, reduce nitrogen oxide emission in process of coal combustion, under the atmosphere that oxygen concentration is lower, separate out fugitive constituent by making pulverized coal particle and burn, strengthen the reducing atmosphere of pulverized coal flame, extend the time stopped in reducing atmosphere containing dioxygenase gene and pulverized coal particle, thus reduce nitrogenous gene and oxygen reacts, more NO is made to be reduced to N2, reduce the conversion ratio of the nitrogen in coal to fuel type NO.And stove cigarette is suitably added in the combustion zone Secondary Air of boiler combustion device 1, the oxygen content of air-flow in process of coal combustion is reduced, favourable to reduction NOx generation amount, reduce the generation of boiler combustion coking simultaneously, reduce the generation of NOx, improve boiler combustion efficiency.
In order to optimize such scheme further, return duct 5 being provided with flowmeter 6, for controlling the backflow flue gas amount in return duct 5, can being realized by loop blower fan 4.
In order to optimize such scheme further, return duct 5 and secondary wind inleting tube 8 are respectively arranged with oxygen content measurement mechanism 7, for testing the oxygen content in secondary wind inleting tube 8 and return duct 5, make the proportioning of flue gas and air reach optimum proportioning state.
In order to optimize such scheme further, above-mentioned fire coal boiler fume backflow aftercombustion device also comprises the scattered control system be connected with oxygen content measurement mechanism 7.During use, smoke backflow in return duct 5 runs and is driven by backflow blower fan 4, air force is indicated by flowmeter, this device introduces scattered control system, the English abbreviation of scattered control system is DCS, its English full name is Distributed Control System, controlled by operating personnel, a set of oxygen content measurement mechanism 7 is respectively added in air and the mixed secondary wind inleting tube of flue gas 8 He in return duct 5, the content of Real-Time Monitoring oxygen, transfer to DCS by data and automatically regulate backflow blower fan 4, make the proportioning of flue gas and air, reach optimum proportioning state.
Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (7)
1. a fire coal boiler fume backflow aftercombustion device, it is characterized in that, comprise boiler combustion device, exhaust apparatus, return duct, backflow blower fan and secondary wind inleting tube, wherein, described secondary wind inleting tube is communicated with the sidewall of described boiler combustion device, described exhaust apparatus is communicated with described boiler combustion device, and described secondary wind inleting tube is communicated with described exhaust apparatus by described return duct.
2. fire coal boiler fume backflow aftercombustion device according to claim 1, it is characterized in that, described exhaust apparatus is provided with impurity removing apparatus, the connectivity part of described return duct and described exhaust apparatus is positioned at the rear of described impurity removing apparatus.
3. fire coal boiler fume backflow aftercombustion device according to claim 2, it is characterized in that, described impurity removing apparatus comprises electric dust collector.
4. fire coal boiler fume backflow aftercombustion device according to claim 2, it is characterized in that, described impurity removing apparatus comprises denitration desulfurizer.
5. fire coal boiler fume backflow aftercombustion device according to claim 1, is characterized in that, described return duct is provided with flowmeter.
6. fire coal boiler fume backflow aftercombustion device according to claim 1, it is characterized in that, described return duct and described secondary wind inleting tube are respectively arranged with oxygen content measurement mechanism.
7. fire coal boiler fume backflow aftercombustion device according to claim 6, is characterized in that, also comprise the scattered control system be connected with described oxygen content measurement mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420689805.7U CN204358710U (en) | 2014-11-17 | 2014-11-17 | Fire coal boiler fume backflow aftercombustion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420689805.7U CN204358710U (en) | 2014-11-17 | 2014-11-17 | Fire coal boiler fume backflow aftercombustion device |
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| CN204358710U true CN204358710U (en) | 2015-05-27 |
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| CN201420689805.7U Active CN204358710U (en) | 2014-11-17 | 2014-11-17 | Fire coal boiler fume backflow aftercombustion device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406161A (en) * | 2014-11-17 | 2015-03-11 | 北京联优创展科技有限公司 | Coal-fired boiler flue gas backflow and supplement burning device |
| CN106122943A (en) * | 2016-06-29 | 2016-11-16 | 无锡锡能锅炉有限公司 | A kind of zero-emission combustion method of coal-burning boiler |
-
2014
- 2014-11-17 CN CN201420689805.7U patent/CN204358710U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406161A (en) * | 2014-11-17 | 2015-03-11 | 北京联优创展科技有限公司 | Coal-fired boiler flue gas backflow and supplement burning device |
| CN106122943A (en) * | 2016-06-29 | 2016-11-16 | 无锡锡能锅炉有限公司 | A kind of zero-emission combustion method of coal-burning boiler |
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