CN217746502U - Biomass boiler flue cooling and denitration system - Google Patents
Biomass boiler flue cooling and denitration system Download PDFInfo
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- CN217746502U CN217746502U CN202221199715.0U CN202221199715U CN217746502U CN 217746502 U CN217746502 U CN 217746502U CN 202221199715 U CN202221199715 U CN 202221199715U CN 217746502 U CN217746502 U CN 217746502U
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- flue
- biomass boiler
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- temperature
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- 239000002028 Biomass Substances 0.000 title claims abstract description 79
- 238000001816 cooling Methods 0.000 title claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 110
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000003546 flue gas Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 36
- 238000012544 monitoring process Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 5
- 238000006479 redox reaction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 4
- 239000013618 particulate matter Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 239000012719 wet electrostatic precipitator Substances 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000012717 electrostatic precipitator Substances 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 28
- 238000000034 method Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
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Classifications
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model belongs to the technical field of flue gas dust removal processing technology and specifically relates to a biomass boiler flue cooling deNOx systems, including biomass boiler, wherein, biomass boiler's exhaust end intercommunication has SCR outer reactor, SCR outer reactor's exhaust end intercommunication has the sack cleaner, the intercommunication has the draught fan on the sack cleaner, the output intercommunication of draught fan has water scrubber, water scrubber's exhaust end intercommunication has wet-type electrostatic precipitator, water scrubber's inlet end is equipped with the auxiliary flue, auxiliary flue's the other end and biomass boiler's exhaust end intercommunication, be equipped with the control mechanism that can control flue gas flow in the auxiliary flue on the auxiliary flue, the utility model discloses the smoke and dust that is convenient for produce biomass boiler realizes the clean emission of ultralow, and the treatment effect is good, has extensive application prospect in flue gas dust removal processing technology field.
Description
Technical Field
The utility model belongs to the technical field of flue gas dust removal processing technique and specifically relates to a biomass boiler flue cooling deNOx systems.
Background
The biomass boiler is a novel boiler taking biomass energy as fuel, and wastes in the agricultural production process, such as crop straws, wastes of agriculture and forestry processing industry and the like can be used as the fuel of the boiler. The biomass boiler has lower contents of sulfur dioxide and nitrogen oxide in the discharged flue gas, and does not produce waste residues, so compared with a coal-fired boiler, the biomass boiler is more energy-saving and environment-friendly.
At present, environmental pollution becomes a global problem mainly comprising greenhouse gases, ozone layer destruction and acid rain, and smoke discharged from biomass boilers mainly comprises nitrogen oxides (NOx) and sulfur dioxide (SO) 2 ) The particle matters are main reasons causing environmental deterioration, so that various types of biomass boiler dust removal devices are introduced in the market for reducing smoke emission components of the biomass boiler, and a cloth bag dust removal device is generally adopted for reducing smoke particles contained in the smoke of the biomass boiler, so that the content of the smoke in the smoke can be reduced by filtering the smoke particles in the smoke through a filter bag; for reducing sulfur dioxide (SO) in smoke 2 ) Generally, a desulfurizing tower is adopted, flue gas is introduced into the desulfurizing tower for spraying, and SO is generated through oxidation-reduction reaction 2 Absorbing; in order to reduce nitrogen oxides (NOx) in the smoke, denitration treatment is generally performed on SCR reaction by using in-furnace denitration and ammonia gas outside the furnace.
Under general conditions, through the mutual supporting processing of inside and outside denitration of stove, desulfurizing tower desulfurization and sack dust removal, can reach fine smoke and dust treatment effect, but in the actual operation condition, boiler exhaust flue gas temperature is generally about 450 ℃ behind the biomass boiler burning shaping fuel, and the higher processing that is unfavorable for follow-up SOx/NOx control of temperature, influences the dust removal effect of sack dust removal simultaneously, is difficult to realize the clean emission of ultralow, and a biomass boiler flue cooling denitration system is needed for this reason urgently, solves the poor problem of present biomass boiler smoke and dust treatment effect.
SUMMERY OF THE UTILITY MODEL
The invention discloses a cooling and denitration system for a biomass boiler flue, which aims to solve the problems that when flue gas generated by the biomass boiler is treated at present, the temperature of the flue gas discharged by the boiler is generally about 450 ℃, the temperature is higher, the subsequent desulfurization and denitration treatment is not facilitated, the dust removal effect of cloth bag dust removal is influenced, ultra-low clean emission is difficult to realize, and the smoke treatment effect of the biomass boiler is poor.
The technical scheme of the utility model is, including biomass boiler, wherein, biomass boiler is last to have seted up raw materials import, biomass boiler's exhaust end intercommunication has SCR outer reactor for carry out the nitrogen oxide of redox reaction in order to detach dusty gas, SCR outer reactor's exhaust end intercommunication has the sack cleaner, is arranged in detaching the particulate matter in the flue gas, the intercommunication has the draught fan on the sack cleaner for the flow of flue gas in the control duct, the output intercommunication of draught fan has water bath dust collector for get rid of the SO in the flue gas 2 And the exhaust end of the water bath dust collector is communicated with a wet electrostatic dust collection device for further removing dust from the flue gas, the air inlet end of the water bath dust collector is provided with an auxiliary flue for refluxing the flue gas discharged by the draught fan, the other end of the auxiliary flue is communicated with the exhaust end of the biomass boiler, and a control mechanism capable of controlling the flow of the flue gas in the auxiliary flue is arranged on the auxiliary flue.
Preferably, a chimney is arranged at the exhaust end of the wet electrostatic dust removal device, and an exhaust port is formed in the chimney.
Preferably, the exhaust end of the biomass boiler is communicated with a main flue for discharging and circulating dust-containing gas generated in the biomass boiler, the SCR external reactor, the bag-type dust collector, the induced draft fan, the water bath dust collector, the wet electrostatic dust collection device and the chimney are sequentially communicated through the main flue, and the main flue is communicated with the auxiliary flue.
Preferably, control mechanism includes control panel, temperature sensing module, inverter motor, return-flow fan, be equipped with return-flow fan in the auxiliary flue for control the flue gas flow in the auxiliary flue, be equipped with temperature sensing module on the flue header for the temperature of a plurality of positions in the flue header is monitored, be equipped with inverter motor on the return-flow fan, return-flow fan fixed connection is in inverter motor's output, electric connection has control panel on the inverter motor, control panel and temperature sensing module electric connection.
Preferably, the temperature sensing module comprises 3 temperature sensors, monitoring 3 points respectively: the temperature sensor I is arranged at the exhaust end of the main flue and used for monitoring the temperature of dust airflow in the main flue at the exhaust end of the biomass boiler in real time; the temperature sensor II is arranged at the air inlet end of the water bath dust collector and is used for monitoring the temperature of the backflow dust flow in real time; and the temperature sensor III is arranged at the air inlet end of the SCR furnace external reactor on the main flue and is used for monitoring the temperature of the mixed backflow dust flow and the main flue dust flow in real time.
Preferably, the water bath dust remover is provided with a water inlet, and one side of the water bath dust remover is provided with a wastewater outlet.
Adopt the technical scheme of the utility model can reach following beneficial effect: (1) Arranging an SCR furnace external reactor, a bag-type dust remover, a draught fan and a water bath dust remover, removing nitride in dust-containing gas through the SCR furnace external reactor, removing particulate matters in flue gas through the bag-type dust remover, and removing SO in the flue gas through the water bath dust remover 2 The gas discharged by the biomass boiler is subjected to denitration and dust removal, flue gas purification and SO removal in the flue gas respectively through an SCR (selective catalytic reduction) furnace external reactor, a bag-type dust remover and a water bath dust remover 2 Meanwhile, the high-temperature gas discharged by the biomass boiler is favorably cooled in the denitration and dedusting processes; (2) Set up control mechanism, through temperature sensing module real-time supervision biomass boiler exhaust gas temperature, when biomass boiler exhaust gas temperature was too high, control panel controls inverter motor and makes return fan introduce more low temperature dusty gas and get into the auxiliary flue, and then enter into the flue between biomass boiler and the external reactor of SCR stove, thereby mix with biomass boiler exhaust high-temperature gas, and then make its cooling, when biomass boiler exhaust gas temperature was too low, control panel controls inverter motor and makes return fan introduce still less low temperature dusty gas and get into the auxiliary flue, be favorable to the control to enter into SCR stoveThe flue gas temperature of the outer reactor stably reaches the optimal denitration temperature required by the SCR outer reactor, so that the dedusting and denitration effect is improved, and the dedusting and denitration efficiency is accelerated; (3) The denitration system further improves the denitration effect, forms a flue gas reflux system through a control mechanism, enables part of gas before water bath dust removal to obtain secondary denitration through reflux, further improves the denitration effect, reduces the content of nitrogen oxide (NOx) in the discharged gas, is beneficial to ultra-low emission, simultaneously reduces the temperature of the main flue gas of the dust removal system, reduces the load of a dust removal device, is beneficial to achieving ultra-low emission, simultaneously reduces the operating cost of the dust removal device, and saves the cost; (4) The wet electrostatic dust removal device is arranged, so that the flue gas purification and the further treatment of the smoke dust are facilitated; (5) The system has a simple structure, mainly adopts a flue (air pipe), a connecting wire and universal parts, has the advantages of simple material selection, convenient processing, convenient layout and installation and easy modification; the technical scheme of the utility model has extensive application prospect in flue gas dust removal processing technology field.
Drawings
Fig. 1 is a system structure diagram of the present invention.
Fig. 2 is a structural diagram of the water bath dust collector of the utility model.
The system comprises a biomass boiler 1, a biomass boiler 2, a raw material inlet 3, an SCR (selective catalytic reduction) furnace external reactor 4, a bag-type dust collector 5, an induced draft fan 6, a water bath dust collector 7, a wet electrostatic dust collection device 8, an auxiliary flue 9, a control panel 10, a temperature sensing module 11, a variable frequency motor 12, a backflow fan 13, a main flue 14, a chimney 15, a water inlet 16 and a wastewater outlet.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention, and in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as limiting the present invention.
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 throughout the description of the present invention, it being understood that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; 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 invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-2, the cooling and denitration system for the flue of the biomass boiler comprises a biomass boiler 1, and specifically, in one embodiment, a raw material inlet 2 is formed in the biomass boiler 1, and an exhaust end of the biomass boiler 1 is communicated with an SCR external reactor 3 for performing an oxidation-reduction reaction to remove nitrogen oxides in a dust-containing gas;
in the embodiment, wastes in the agricultural production process, such as crop straws, wastes in the agriculture and forestry processing industry and the like are put into the biomass boiler 1 through the raw material inlet 2 on the biomass boiler 1 for combustion, because the contents of sulfur and nitrogen elements in biomass are relatively high, a large amount of nitrogen oxides can be generated in the combustion process, the generated flue gas is discharged through the tail exhaust end of the biomass boiler 1, the exhaust end of the biomass boiler 1 is communicated with the SCR external reactor 3 through the main flue 13, and the oxidation-reduction reaction is carried out in the SCR external reactor 3 to remove nitridation in dust-containing gasWhen the reaction is carried out in the SCR external reactor 3, the temperature needs to be proper SO as to obtain the best denitration efficiency, the SCR external reactor 3, a bag-type dust remover 4 and an induced draft fan 5 are arranged, the nitride in the dust-containing gas is removed through the SCR external reactor 3, the particulate matter in the flue gas is removed through the bag-type dust remover 4, and the SO in the flue gas is removed through a water bath dust remover 6 2 The gas discharged from the biomass boiler 1 is denitrated and dedusted by the SCR external reactor 3, the bag-type dust collector 4 and the water bath deduster 6, so that the flue gas is purified, and the high-temperature gas discharged from the biomass boiler 1 is cooled in the denitrating and dedusting process.
As shown in fig. 1-2, a cooling and denitration system for a flue of a biomass boiler specifically includes an exhaust end of an SCR furnace external reactor 3 communicated with a bag-type dust remover 4 for removing particulate matters in flue gas, the bag-type dust remover 4 is communicated with an induced draft fan 5 for controlling flow of flue gas in a pipeline, an output end of the induced draft fan 5 is communicated with a water bath dust remover 6 for removing SO in flue gas 2 ；
In the embodiment, the SCR external reactor 3 is communicated with the bag-type dust remover 4 through the main flue 13, the output end of the bag-type dust remover 4 is provided with the induced draft fan 5, the flow rate and the speed of flue gas in the main flue 13 are controlled through the rotating speed of the induced draft fan 5, the output end of the induced draft fan 5 is communicated with the input end of the water bath dust remover 6, and SO in the flue gas is removed through the water bath dust remover 6 2 。
As shown in fig. 1-2, a biomass boiler flue cooling and denitration system specifically includes an embodiment that an exhaust end of a water bath dust remover 6 is communicated with a wet electrostatic dust removal device 7 for further removing dust from flue gas, an air inlet end of the water bath dust remover 6 is provided with an auxiliary flue 8 for refluxing flue gas discharged by an induced draft fan 5, the other end of the auxiliary flue 8 is communicated with the exhaust end of the biomass boiler 1, the auxiliary flue 8 is provided with a control mechanism capable of controlling flue gas flow in the auxiliary flue 8, the control mechanism includes a control panel 9, a temperature sensing module 10, a variable frequency motor 11 and a backflow fan 12, the auxiliary flue 8 is provided with the backflow fan 12 for controlling flue gas flow in the auxiliary flue 8, the main flue 13 is provided with the temperature sensing module 10 for monitoring temperatures at multiple positions in the main flue 13, the backflow fan 12 is provided with a variable frequency motor 11, the backflow fan 12 is fixedly connected to an output end of the variable frequency motor 11, the variable frequency motor 11 is electrically connected to the control panel 9, and the control panel 9 is electrically connected to the temperature sensing module 10;
in this embodiment, the auxiliary flue 8 sets up on the flue 13 between sack cleaner 4 and water-bath dust collector 6, and backward flow fan 12 sets up in auxiliary flue 8 for control the flue gas flow in the auxiliary flue 8, temperature sensing module 10 includes 3 temperature sensor, monitors 3 respectively and is clicked: the temperature sensor I is arranged at the exhaust end of the main flue 13 and used for monitoring the temperature of dust airflow in the main flue 13 at the exhaust end of the biomass boiler 1 in real time; the temperature sensor II is arranged at the air inlet end of the water bath dust collector 6 and is used for monitoring the temperature of the backflow dust flow in real time; the temperature sensor III is arranged at the air inlet end of the SCR external reactor 3 on the main flue 13 and used for monitoring the temperature of the mixed backflow dust flow and the dust flow of the main flue 13 in real time, under the normal condition, the temperature of the temperature sensor I is the highest, the temperature of the temperature sensor II is the lowest, the temperature of the temperature sensor III is the temperature controlled by the SCR external reactor 3 in real time, namely the temperature with the best denitration effect, when the temperature monitored by the temperature sensor I exceeds the temperature with the best denitration effect, the backflow fan 12 works to flow the low Wen Chenqi back into the main flue 13 to be mixed with the high-temperature dust flow in the main flue 13, so that the temperature of the dust flow entering the SCR external reactor 3 of the main flue is reduced, the amount of temperature reduction of the dust airflow (namely the optimum temperature range of the denitration effect) can be realized by controlling the rotating speed (the air volume for generating the backflow dust airflow) of the variable frequency motor 11 in real time through the control mechanism comprising the control panel 9, which is favorable for controlling the temperature of the flue gas entering the SCR external reactor 3, so that the flue gas stably reaches the optimum denitration temperature required by the SCR external reactor 3, is favorable for improving the dust removal and denitration effect and accelerating the dust removal and denitration efficiency, in particular, the temperature sensing module 10 monitors the temperature (about 450 ℃) of the gas discharged from the biomass boiler 1 in real time and mixes with the temperature (about 80 ℃) of the gas before entering the water bath dust remover 6, and if the temperature is higher than 450 ℃, the control module controls the variable frequency motor 11 to enable the backflow fan 12 to introduce more low-temperature dust-containing gas into the main flue 13; if the temperature is lower than 450 ℃, the control module controls the variable frequency motor 11 to enable the backflow fan 12 to introduce less low-temperature dust-containing gas into the main flue 13, a flue gas backflow system is formed through the control module, partial gas before water bath dust removal is enabled to obtain secondary denitration through backflow, the denitration effect is further improved, the content of nitrogen oxides (NOx) in discharged gas is reduced, ultra-low emission is facilitated, meanwhile, the gas temperature of the main flue 13 of the dust removal system is reduced, the load of the dust removal device is reduced, ultra-low emission is facilitated, meanwhile, the operating cost of the dust removal device is reduced, and the cost is saved.
As shown in fig. 1-2, a biomass boiler flue cooling and denitration system specifically includes a main flue 13 communicated with an exhaust end of a biomass boiler 1 for discharging and circulating a dust-containing gas generated in the biomass boiler 1, an SCR external reactor 3, a bag-type dust collector 4, an induced draft fan 5, a water bath dust collector 6, a wet electrostatic dust collector 7, and a chimney 14 sequentially communicated with the main flue 13, the main flue 13 is communicated with an auxiliary flue 8, the exhaust end of the wet electrostatic dust collector 7 is communicated with the chimney 14, the chimney 14 is provided with an exhaust port for discharging the dust-removed gas into the atmosphere, the water bath dust collector 6 is provided with a water inlet 15, and one side of the water bath dust collector 6 is provided with a wastewater outlet 16 for facilitating the circulation of water in the water bath dust collector 6.
The working principle of the device is as follows: when the device is used, smoke generated in the biomass boiler 1 is discharged from the exhaust end at the tail part of the biomass boiler 1, and is dedusted in the biomass boiler 1, the SCR external reactor 3, the bag-type dust remover 4, the draught fan 5, the water bath deduster 6 and the wet electrostatic dedusting device 7 through the main flue 13 in sequence, nitrides in dust-containing gas are removed through the SCR external reactor 3, particles in the smoke are removed through the bag-type dust remover 4, and SO in the smoke is removed through the water bath deduster 6 2 Further dedusting the flue gas by the wet electrostatic dust collection device 7, monitoring the temperature of a plurality of positions in the main flue 13 by the temperature sensing module 10, controlling the variable frequency motor 11 by the control panel 9 to enable the backflow fan 12 to introduce more low-temperature dusty gas into the auxiliary flue 8 when the temperature of the flue gas discharged by the biomass boiler 1 is too high, and further introducing more low-temperature dusty gas into the auxiliary flue 8And the gas enters a main flue 13 between the biomass boiler 1 and the SCR external reactor 3 to be mixed with high-temperature gas discharged by the biomass boiler 1 so as to cool the gas, and when the temperature of the gas discharged by the biomass boiler 1 is too low, the control panel 9 controls the variable frequency motor 11 to ensure that less low-temperature dusty gas introduced by the return fan 12 enters the auxiliary flue 8 so as to stably reach the optimal denitration effect temperature required by the SCR external reactor 3.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The utility model provides a biomass boiler flue cooling deNOx systems, includes biomass boiler (1), its characterized in that, raw materials import (2) have been seted up on biomass boiler (1), the exhaust end intercommunication of biomass boiler (1) has SCR external reactor (3) for carry out the oxidation-reduction reaction in order to detach the nitrogen oxide in the dusty gas, the exhaust end intercommunication of SCR external reactor (3) has sack cleaner (4) for detach the particulate matter in the flue gas, the intercommunication has draught fan (5) on sack cleaner (4) for the flow of flue gas in the control duct, the output intercommunication of draught fan (5) has water bath deduster (6) for get rid of SO in the flue gas 2 The exhaust end intercommunication of water-bath (6) has wet electrostatic precipitator device (7) for further remove dust to the flue gas, the inlet end of water-bath (6) is equipped with auxiliary flue (8), is used for backward flow draught fan (5) exhaust flue gas, the other end of auxiliary flue (8) and the exhaust end intercommunication of biomass boiler (1), be equipped with on auxiliary flue (8) and carry out the control mechanism that controls to flue gas flow in auxiliary flue (8), the exhaust end of biomass boiler (1) is heldA main flue (13) is communicated with the biomass boiler (1) for discharging and circulating the dust-containing gas generated in the biomass boiler.
2. The biomass boiler flue cooling and denitration system according to claim 1, wherein a chimney (14) is provided at an exhaust end of the wet electrostatic dust removal device (7), and an exhaust port is provided on the chimney (14).
3. The cooling and denitration system for the biomass boiler flue is characterized in that the biomass boiler (1), the SCR external reactor (3), the bag-type dust collector (4), the induced draft fan (5), the water bath dust collector (6), the wet electrostatic dust collection device (7) and the chimney (14) are sequentially communicated through the main flue (13), and the main flue (13) is communicated with the auxiliary flue (8).
4. The biomass boiler flue cooling and denitration system according to claim 1, wherein the control mechanism comprises a control panel (9), a temperature sensing module (10), a variable frequency motor (11) and a backflow fan (12), the backflow fan (12) is arranged in the auxiliary flue (8) and used for controlling the flow rate of flue gas in the auxiliary flue (8), the temperature sensing module (10) is arranged on the main flue (13) and used for monitoring the temperature of a plurality of positions in the main flue (13), the variable frequency motor (11) is arranged on the backflow fan (12), the backflow fan (12) is fixedly connected to the output end of the variable frequency motor (11), the variable frequency motor (11) is electrically connected with the control panel (9), and the control panel (9) is electrically connected with the temperature sensing module (10).
5. The cooling and denitration system for the flue of the biomass boiler as claimed in claim 4, wherein the temperature sensing module (10) comprises 3 temperature sensors, which respectively monitor 3 points: the temperature sensor I is arranged at the exhaust end of the main flue (13) and used for monitoring the temperature of dust airflow in the main flue (13) at the exhaust end of the biomass boiler (1) in real time; the temperature sensor II is arranged at the air inlet end of the water bath dust collector (6) and is used for monitoring the temperature of the backflow dust flow in real time; and the temperature sensor III is arranged at the air inlet end of the SCR external reactor (3) on the main flue (13) and is used for monitoring the temperature of the mixed backflow dust flow and the dust flow in the main flue (13) in real time.
6. The cooling and denitration system for the biomass boiler flue is characterized in that a water inlet (15) is formed in the water bath dust remover (6), and a wastewater outlet (16) is formed in one side of the water bath dust remover (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221199715.0U CN217746502U (en) | 2022-05-19 | 2022-05-19 | Biomass boiler flue cooling and denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221199715.0U CN217746502U (en) | 2022-05-19 | 2022-05-19 | Biomass boiler flue cooling and denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217746502U true CN217746502U (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221199715.0U Expired - Fee Related CN217746502U (en) | 2022-05-19 | 2022-05-19 | Biomass boiler flue cooling and denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217746502U (en) |
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2022
- 2022-05-19 CN CN202221199715.0U patent/CN217746502U/en not_active Expired - Fee Related
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