CN214307052U - Low-nitrogen biomass gas combustion and activated carbon activation system - Google Patents
Low-nitrogen biomass gas combustion and activated carbon activation system Download PDFInfo
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- CN214307052U CN214307052U CN202023269913.3U CN202023269913U CN214307052U CN 214307052 U CN214307052 U CN 214307052U CN 202023269913 U CN202023269913 U CN 202023269913U CN 214307052 U CN214307052 U CN 214307052U
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Abstract
The invention provides a low-nitrogen biomass gas combustion synergistic activated carbon activation system, which comprises: the tube type heat exchanger is used for heating low-temperature biomass gas; the primary combustion chamber is used for combusting high-temperature biomass gas; the reduction chamber is used for reducing the content of nitrogen oxides in combustion tail gas; an activation chamber for activating the biomass charcoal particles and reducing the content of nitrogen oxides; the steam generator is used for collecting heat of the high-temperature flue gas; the secondary combustion chamber is used for combusting combustible components in the low-temperature flue gas; the shell and tube heat exchanger is arranged on the upper side of the reduction chamber, a primary combustion chamber is arranged on the lower side of the reduction chamber, an activation chamber is arranged on the upper side of the shell and tube heat exchanger, a steam generator is arranged on the upper side of the activation chamber, and a secondary combustion chamber is arranged on the upper side of the steam generator; according to the invention, a part of biomass gas is combusted to heat the low-temperature biomass gas, so that tar is prevented from condensing to block a pipeline, and stable transportation of the biomass gas in the pipeline is ensured.
Description
Technical Field
The invention relates to the technical field of biomass gasification, in particular to a low-nitrogen biomass gas combustion and activated carbon activation system.
Background
Biomass energy is a renewable energy source, biomass gasification technology is one of the main utilization modes of the biomass energy, biomass gas can be used for multiple purposes such as boiler, power generation, hydrogen production and the like, but gaseous tar contained in the biomass gas is condensed when meeting cold, so that the normal use of valves and instruments is influenced, and pipelines are easily blocked, so that the biomass gas is difficult to convey in a long distance.
The biomass gasification technology adopting air as a gasifying agent has the advantages that the biomass fuel gas contains a large amount of nitrogen, nitrogen oxides can be generated in the combustion process of the biomass fuel gas, and the excessive nitrogen oxide emission poses great threat to human health and living environment. At present, the most mainstream denitration technology in China is a Selective Catalytic Reduction (SCR) flue gas denitration technology, but the SCR denitration technology has the problems of catalyst poisoning, high cost, ammonia leakage and other secondary pollution.
The biomass gasification co-production charcoal technology is characterized in that the biomass gasification reaction process is controlled, biomass gas is generated in the gasification process, high-quality biomass charcoal can be obtained, and the biomass charcoal can be used as a raw material for producing active carbon. How to realize the safe, stable, clean and efficient utilization of biomass resources becomes an important problem which needs to be solved urgently by technical personnel in the technical field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a low-nitrogen biomass gas combustion and activated carbon activation system, so as to solve the problems in the background art.
The technical problem solved by the invention is realized by adopting the following technical scheme: a low-nitrogen biomass gas combustion synergistic activated carbon activation system comprises:
the tube type heat exchanger is used for heating low-temperature biomass gas;
the primary combustion chamber is used for combusting high-temperature biomass gas;
the reduction chamber is used for reducing the content of nitrogen oxides in combustion tail gas;
an activation chamber for activating the biomass charcoal particles and reducing the content of nitrogen oxides;
the steam generator is used for collecting heat of the high-temperature flue gas;
the secondary combustion chamber is used for combusting combustible components in the low-temperature flue gas;
the shell and tube heat exchanger is arranged on the upper side of the reduction chamber, a primary combustion chamber is arranged on the lower side of the reduction chamber, an activation chamber is arranged on the upper side of the shell and tube heat exchanger, a steam generator is arranged on the upper side of the activation chamber, and a secondary combustion chamber is arranged on the upper side of the steam generator;
preferably, the tube type heat exchanger consists of a low-temperature biomass gas inlet, a high-temperature biomass gas outlet and a first heat exchange tube, and the first heat exchange tube is communicated with the first pressure equalizing chamber and the reduction chamber;
preferably, the primary combustion chamber consists of a first pressure-equalizing gas chamber, a first pressure-equalizing air chamber, a first hood and a second hood, the first pressure-equalizing gas chamber is positioned at the bottom of the primary combustion chamber, the second hood is arranged at the upper part of the first pressure-equalizing gas chamber, the first pressure-equalizing gas chamber is communicated with the primary combustion chamber through the second hood, the first pressure-equalizing air chamber is positioned at the bottom of the first pressure-equalizing gas chamber, the first hood is arranged at the upper part of the first pressure-equalizing air chamber, the first pressure-equalizing air chamber is communicated with the primary combustion chamber through the first hood, and the first hood penetrates through the first pressure-equalizing gas chamber;
preferably, the reduction chamber consists of a second pressure-equalizing gas chamber, a third blast cap and a high-temperature biomass gas second inlet, the upper part of the reduction chamber is communicated with the first heat exchange tube, the upper part and the lower part of the second pressure-equalizing gas chamber are communicated with the third blast cap, the upper part of the third blast cap is communicated with the reduction chamber, the lower part of the third blast cap is communicated with the primary combustion chamber, the third blast cap is provided with a small hole in the second pressure-equalizing gas chamber, and the high-temperature biomass gas second inlet is communicated with the second pressure-equalizing gas chamber;
preferably, the activation chamber consists of a first pressure equalizing chamber, a second pressure equalizing chamber, a fourth hood and a fifth hood, the fifth hood is arranged at the upper part of the second pressure equalizing chamber, the second pressure equalizing chamber is communicated with the activation chamber through the fifth hood, the bottom of the first pressure equalizing chamber is communicated with a first heat exchange tube of the tube type heat exchanger, the fourth hood is arranged at the upper part of the first pressure equalizing chamber, the first pressure equalizing chamber is communicated with the activation chamber through the fourth hood, and the fourth hood penetrates through the second pressure equalizing chamber;
preferably, the steam generator consists of a water supply inlet, a steam outlet and a second heat exchange tube, the upper part of the second heat exchange tube is communicated with the third pressure equalizing chamber, and the lower part of the second heat exchange tube is communicated with the activation chamber;
preferably, the secondary combustion chamber consists of a third pressure equalizing chamber, a second pressure equalizing air chamber, a sixth hood and a seventh hood, the sixth hood is arranged at the upper part of the second pressure equalizing air chamber, the second pressure equalizing air chamber is communicated with the secondary combustion chamber through the sixth hood, the bottom of the third pressure equalizing chamber is communicated with a second heat exchange tube of the steam generator, the seventh hood is arranged at the upper part of the third pressure equalizing chamber, the third pressure equalizing chamber is communicated with the secondary combustion chamber through the seventh hood, and the seventh hood penetrates through the second pressure equalizing air chamber.
Preferably, a first high-temperature biomass gas inlet is formed in the side face of the first pressure-equalizing gas chamber of the primary combustion chamber, and a first air inlet is formed in the side face of the first pressure-equalizing gas chamber of the primary combustion chamber.
Preferably, the side surface of the activation chamber is provided with a biomass charcoal particle inlet and an activated charcoal outlet, and the side surface of a second pressure equalizing chamber of the activation chamber is provided with a high-temperature air and water vapor inlet.
Preferably, a smoke outlet is formed in the side face of the secondary combustion chamber, and a second air inlet is formed in the side face of a second pressure equalizing air chamber of the secondary combustion chamber.
Compared with the prior art, the invention has the beneficial effects that:
(1) the low-temperature biomass gas is heated by burning part of the biomass gas, so that tar is prevented from being condensed to block a pipeline, and the stable conveying of the biomass gas in the pipeline is ensured.
(2) NOx is reduced through gaseous tar in the biomass fuel gas, and the content of NOx in the flue gas is reduced.
(3) NOx is reduced through the high-temperature biomass carbon particles, and meanwhile, the biomass carbon particles are activated through high-temperature steam, so that the content of NOx in flue gas is reduced, and the reasonable utilization of the biomass carbon particles is realized.
(4) The heat of the activated tail gas is absorbed by the steam generator, so that the combustion temperature in the secondary combustion chamber is reduced, and the generation of thermal NOx is avoided.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
In the description of the present invention, it should be noted that unless otherwise 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, mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
As shown in fig. 1, a low-nitrogen biomass gas combustion synergistic activated carbon activation system comprises:
the shell and tube heat exchanger 1 is used for heating low-temperature biomass gas;
a primary combustion chamber 2 for burning high-temperature biomass gas;
a reduction chamber 3 for reducing the content of nitrogen oxides in the combustion exhaust gases;
an activation chamber 4 for activating the biomass charcoal particles and reducing the content of nitrogen oxides;
the steam generator 5 is used for collecting heat of the high-temperature flue gas;
a secondary combustion chamber 6 for combusting combustible components in the low-temperature flue gas;
the shell and tube heat exchanger 1 is arranged on the upper side of a reduction chamber 3, a primary combustion chamber 2 is arranged on the lower side of the reduction chamber 3, an activation chamber 4 is arranged on the upper side of the shell and tube heat exchanger 1, a steam generator 5 is arranged on the upper side of the activation chamber 4, and a secondary combustion chamber 6 is arranged on the upper side of the steam generator 5;
further, the tube type heat exchanger 1 consists of a low-temperature biomass fuel gas inlet 102, a high-temperature biomass fuel gas outlet 103 and a first heat exchange tube 101, wherein the first heat exchange tube 101 is communicated with a first pressure equalizing chamber 403 and a reduction chamber 3;
further, the primary combustion chamber 2 is composed of a first pressure equalizing gas chamber 205, a first pressure equalizing air chamber 202, a first hood 201 and a second hood 204, the first pressure equalizing gas chamber 205 is located at the bottom of the primary combustion chamber 2, the second hood 204 is arranged at the upper portion of the first pressure equalizing gas chamber 205, the first pressure equalizing gas chamber 205 is communicated with the primary combustion chamber 2 through the second hood 204, the first pressure equalizing air chamber 202 is located at the bottom of the first pressure equalizing gas chamber 205, the first hood 201 is arranged at the upper portion of the first pressure equalizing air chamber 202, the first pressure equalizing air chamber 202 is communicated with the primary combustion chamber 2 through the first hood 201, and the first hood 201 penetrates through the first pressure equalizing gas chamber 205;
further, the reduction chamber 3 is composed of a second pressure-equalizing gas chamber 303, a third hood 301 and a high-temperature biomass gas second inlet 304, the upper portion of the reduction chamber 3 is communicated with the first heat exchange tube 101, the upper portion and the lower portion of the second pressure-equalizing gas chamber 303 are communicated with the third hood 301, the upper portion of the third hood 301 is communicated with the reduction chamber 3, the lower portion of the third hood 301 is communicated with the primary combustion chamber 2, the third hood 301 is provided with a small hole 302 inside the second pressure-equalizing gas chamber 303, and the high-temperature biomass gas second inlet 304 is communicated with the second pressure-equalizing gas chamber 303;
further, the activation chamber 4 is composed of a first pressure equalizing chamber 403, a second pressure equalizing chamber 406, a fourth hood 401 and a fifth hood 405, the fifth hood 405 is arranged at the upper part of the second pressure equalizing chamber 406, the second pressure equalizing chamber 406 is communicated with the activation chamber 4 through the fifth hood 405, the bottom of the first pressure equalizing chamber 403 is communicated with the first heat exchange tube 101 of the shell and tube heat exchanger 1, the fourth hood 401 is arranged at the upper part of the first pressure equalizing chamber 403, the first pressure equalizing chamber 403 is communicated with the activation chamber 4 through the fourth hood 401, and the fourth hood 401 penetrates through the second pressure equalizing chamber 406;
further, the steam generator 5 consists of a feed water inlet 502, a steam outlet 503 and a second heat exchange tube 501, the upper part of the second heat exchange tube 501 is communicated with a third pressure equalizing chamber 606, and the lower part of the second heat exchange tube 501 is communicated with the activation chamber 4;
further, the secondary combustion chamber 6 is composed of a third pressure equalizing chamber 606, a second pressure equalizing air chamber 602, a sixth hood 601 and a seventh hood 605, the sixth hood 601 is arranged at the upper part of the second pressure equalizing air chamber 602, the second pressure equalizing air chamber 602 is communicated with the secondary combustion chamber 6 through the sixth hood 601, the bottom of the third pressure equalizing chamber 606 is communicated with the second heat exchange tube 501 of the steam generator 5, the seventh hood 605 is arranged at the upper part of the third pressure equalizing chamber 606, the third pressure equalizing chamber 606 is communicated with the secondary combustion chamber 6 through the seventh hood 605, and the seventh hood 605 penetrates through the second pressure equalizing air chamber 602.
Further, a first high-temperature biomass gas inlet 206 is arranged on the side of the first pressure equalizing gas chamber 205 of the primary combustion chamber 2, and a first air inlet 203 is arranged on the side of the first pressure equalizing air chamber 202 of the primary combustion chamber 2.
Furthermore, the side surface of the activation chamber 4 is provided with a biomass charcoal particle inlet 404 and an activated charcoal outlet 402, and the side surface of a second pressure equalizing chamber 406 of the activation chamber 4 is provided with a high-temperature air and water vapor inlet 407.
Further, a flue gas outlet 604 is arranged on the side surface of the secondary combustion chamber 6, and a second air inlet 603 is arranged on the side surface of a second pressure equalizing air chamber 602 of the secondary combustion chamber 6.
A low-nitrogen biomass gas combustion synergistic activated carbon activation method comprises the following steps:
1) the low-temperature biomass gas is sent into a tubular heat exchanger 1 to be heated so as to prevent gaseous tar from condensing and separating out to block a pipeline, the heated high-temperature biomass gas is respectively sent into a primary combustion chamber 2 and a reduction chamber 3, and biomass charcoal particles are sent into an activation chamber 4;
2) the high-temperature biomass gas and the air are sprayed into the primary combustion chamber 2 through the second air caps 204 and the first air caps 201 which are alternately arranged, so that the high-temperature biomass gas and the air are uniformly mixed, a high-temperature combustion area is not generated, the generation of thermal NOx is reduced, the content of N2 in the biomass gas is high, and a part of N2 is generated in the combustion process2Conversion to NOx;
3) flue gas generated in the primary combustion chamber 2 is uniformly sprayed into the reduction chamber 3 through the third hood 301, high-temperature biomass gas fed into the second pressure-equalizing gas chamber 303 enters the reduction chamber 3 through the small holes 302 on the third hood 301 and the flue gas, so that the gaseous tar and NOx in the flue gas are fully mixed, the temperature of the mixed gas is reduced, and partial NOx in the flue gas is reduced into N by the tar under the condition2The mixed gas after reaction provides a heat source for the tubular heat exchanger 1;
4) the mixed gas, the high-temperature air and the steam are sprayed into the activation chamber 4 through the fourth wind cap 401 and the fifth wind cap 405 which are alternately arranged, biomass charcoal particles are added from the side surface of the activation chamber 4, the high-temperature air and combustible components in the mixed gas generate combustion reaction to generate high temperature, and the biomass charcoal particles generate high temperature at the temperatureAnd CO in high-temperature steam and mixed gas2The mutual action is converted into active carbon, and simultaneously, partial biomass carbon particles and NOx in the mixed gas are subjected to chemical reaction under the action of oxygen in high-temperature air to convert the NOx into N2Conversion of carbon to CO and CO2The high-temperature flue gas after reaction provides a heat source for the steam generator;
5) the high-temperature flue gas is sent into the secondary combustion chamber 6 through the seventh blast caps 605 which are uniformly arranged after absorbing heat and reducing temperature by the steam generator 5, and is subjected to combustion reaction with the introduced air, so that combustible components in the low-temperature flue gas are few, and the low-temperature flue gas can be completely burnt out at low temperature, thereby ensuring that the content of NOx at a flue gas outlet is greatly reduced.
Further, the temperature of the low-temperature biomass fuel gas is 50-150 ℃.
Furthermore, the temperature of the heated high-temperature biomass fuel gas is 350-400 ℃, and the condensation and the separation of the gas tar are avoided.
Further, the combustion temperature in the primary combustion chamber 2 is 900 ℃ to 1050 ℃.
Further, the temperature of the reduction chamber 3 is 600-900 ℃.
Further, the reaction temperature in the activation chamber 4 is 850-1000 ℃.
Example 1
The method comprises the following steps of (1) taking wood chips as raw materials, adopting a biomass gasification co-production charcoal technology to generate low-temperature biomass gas and charcoal particles at 80 ℃, feeding the low-temperature biomass gas into a tubular heat exchanger to be heated to 360 ℃, avoiding gaseous tar from condensing and separating out to block a pipeline, feeding the heated high-temperature biomass gas at 360 ℃ into a primary combustion chamber and a reduction chamber respectively, and feeding the charcoal particles into an activation chamber;
the high-temperature biomass gas and the normal-temperature air at 360 ℃ are sprayed into the primary combustion chamber through the second air caps and the first air caps which are alternately arranged, so that the high-temperature biomass gas and the air are uniformly mixed, the combustion temperature is 920 ℃, a high-temperature combustion area is not generated, the generation of thermal NOx is reduced, the content of N2 in the biomass gas is high, and a part of N2 is converted into NOx in the combustion process;
the flue gas with the temperature of 920 ℃ generated in the primary combustion chamber is uniformly sprayed into the reduction chamber through the third hood, the high-temperature biomass fuel gas with the temperature of 360 ℃ sent into the pressure-equalizing fuel gas chamber enters the reduction chamber together with the flue gas through the small holes on the third hood, so that the gaseous tar and NOx in the flue gas are fully mixed, the temperature of the mixed gas is reduced to 750 ℃, the tar reduces part of NOx in the flue gas to N2 under the condition, the reacted mixed gas provides a heat source for the tubular heat exchanger, and the temperature of the mixed gas is reduced to 465 ℃ after heat exchange;
the mixed gas, the high-temperature air at 300 ℃ and the high-temperature water vapor at 325 ℃ are sprayed into the activation chamber through the fifth air cap and the fourth air cap which are alternately arranged, the charcoal particles are added from the side surface of the activation chamber, the high-temperature air and the combustible components in the mixed gas generate combustion reaction to generate high temperature of 910 ℃, the charcoal particles, the high-temperature water vapor and CO2 in the mixed gas interact and are converted into activated carbon at the temperature, meanwhile, part of the charcoal particles and NOx in the mixed gas generate chemical reaction under the action of oxygen in the high-temperature air to convert the NOx into N2, carbon elements are converted into CO and CO2, and the high-temperature flue gas at 910 ℃ provides a heat source for the steam generator after the reaction;
the high-temperature flue gas absorbs heat through the steam generator and is cooled to 415 ℃, then the high-temperature flue gas is sent into the secondary combustion chamber through the seventh blast caps which are uniformly arranged, and the high-temperature flue gas and the introduced normal-temperature air are subjected to combustion reaction, so that combustible components in the low-temperature flue gas are few, and the low-temperature flue gas can be completely burnt out at the low temperature of 835 ℃, and the NOx content at a flue gas outlet is greatly reduced.
Example 2
The method comprises the following steps of (1) taking bamboo chips as raw materials, adopting a biomass gasification co-production charcoal technology to generate low-temperature biomass gas and bamboo charcoal particles at the temperature of 115 ℃, feeding the low-temperature biomass gas into a tubular heat exchanger, heating to 385 ℃, avoiding pipeline blockage caused by condensation and separation of gaseous tar, feeding the heated high-temperature biomass gas at the temperature of 385 ℃ into a primary combustion chamber and a reduction chamber respectively, and feeding the bamboo charcoal particles into an activation chamber;
high-temperature biomass gas at 385 ℃ and normal-temperature air are sprayed into the primary combustion chamber through the second air caps and the first air caps which are alternately arranged, so that the high-temperature biomass gas and the air are uniformly mixed, the combustion temperature is 985 ℃, a high-temperature combustion area is not generated, the generation of thermal NOx is reduced, the content of N2 in the biomass gas is high, and a part of N2 is converted into NOx in the combustion process;
the smoke with the temperature of 985 ℃ generated in the primary combustion chamber is uniformly sprayed into the reduction chamber through the third hood, the high-temperature biomass gas with the temperature of 385 ℃ sent into the pressure equalizing gas chamber enters the reduction chamber together with the smoke through the small holes on the third hood, so that the gaseous tar in the high-temperature biomass gas and the NOx in the smoke are fully mixed, the temperature of the mixed gas is reduced to 815 ℃, the tar reduces part of the NOx in the smoke to N2 under the condition, the reacted mixed gas provides a heat source for the tubular heat exchanger, and the temperature of the mixed gas is reduced to 477 ℃ after heat exchange;
the mixed gas, the high-temperature air at 320 ℃ and the high-temperature water vapor at 330 ℃ are sprayed into the activation chamber through the fifth hood and the fourth hood which are alternately arranged, the bamboo charcoal particles are added from the side surface of the activation chamber, the high-temperature air and the combustible components in the mixed gas are subjected to combustion reaction to generate high temperature of 973 ℃, the bamboo charcoal particles, the high-temperature water vapor and CO2 in the mixed gas are interacted and converted into activated carbon at the temperature, meanwhile, part of the bamboo charcoal particles are subjected to chemical reaction with NOx in the mixed gas under the action of oxygen in the high-temperature air to convert NOx into N2, carbon elements are converted into CO and CO2, and after the reaction, the high-temperature flue gas at 973 ℃ provides a heat source for the steam generator;
the high-temperature flue gas absorbs heat through the steam generator and is cooled to 446 ℃, then the high-temperature flue gas is sent into the secondary combustion chamber through the seventh air caps which are uniformly arranged, and the high-temperature flue gas and the introduced normal-temperature air are subjected to combustion reaction, so that the combustible components in the low-temperature flue gas are few, and the low-temperature flue gas can be completely burnt out at the low temperature of 874 ℃, and the NOx content at the flue gas outlet is greatly reduced.
Example 3
The method comprises the following steps of (1) taking coconut shells as raw materials, adopting a biomass gasification co-production charcoal technology to produce low-temperature biomass gas and coconut shell charcoal particles at the temperature of 95 ℃, feeding the low-temperature biomass gas into a tubular heat exchanger to be heated to 372 ℃, avoiding gaseous tar from condensing and separating out to block a pipeline, feeding the heated high-temperature biomass gas at the temperature of 372 ℃ into a primary combustion chamber and a reduction chamber respectively, and feeding the coconut shell charcoal particles into an activation chamber;
372 ℃ high-temperature biomass gas and normal-temperature air are sprayed into the primary combustion chamber through the second air caps and the first air caps which are alternately arranged, so that the high-temperature biomass gas and the air are uniformly mixed, the combustion temperature is 998 ℃, a high-temperature combustion area is not generated, the generation of thermal NOx is reduced, the content of N2 in the biomass gas is high, and a part of N2 is converted into NOx in the combustion process;
998 ℃ flue gas generated in the primary combustion chamber is uniformly sprayed into the reduction chamber through the third hood, 372 ℃ high-temperature biomass gas sent into the pressure equalizing gas chamber enters the reduction chamber together with the flue gas through the small holes in the third hood, so that the gaseous tar and NOx in the flue gas in the high-temperature biomass gas are fully mixed, the temperature of the mixed gas is reduced to 807 ℃, part of NOx in the flue gas is reduced to N2 by the tar under the condition, the reacted mixed gas provides a heat source for the tubular heat exchanger, and the temperature of the mixed gas is reduced to 468 ℃ after heat exchange;
the mixed gas, the high-temperature air at 330 ℃ and the high-temperature water vapor at 300 ℃ are sprayed into the activation chamber through the fifth hood and the fourth hood which are alternately arranged, coconut shell carbon particles are added from the side surface of the activation chamber, the high-temperature air and combustible components in the mixed gas are subjected to combustion reaction to generate high temperature of 975 ℃, the coconut shell carbon particles, the high-temperature water vapor and CO2 in the mixed gas are mutually reacted and converted into activated carbon at the temperature, meanwhile, part of the coconut shell carbon particles are subjected to chemical reaction with NOx in the mixed gas under the action of oxygen in the high-temperature air to convert NOx into N2, carbon elements are converted into CO and CO 35 2, and the high-temperature flue gas at 973 ℃ provides a heat source for the steam generator after the reaction;
the high-temperature flue gas absorbs heat through the steam generator and is cooled to 452 ℃, then the high-temperature flue gas is sent into the secondary combustion chamber through the seventh air caps which are uniformly arranged, and the high-temperature flue gas and the introduced normal-temperature air are subjected to combustion reaction, so that combustible components in the low-temperature flue gas are few, and the low-temperature flue gas can be completely burnt out at the low temperature of 867 ℃, and the content of NOx at a flue gas outlet is greatly reduced.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a low nitrogen living beings gas combustion is active carbon activation system in coordination which characterized in that: the method comprises the following steps:
the shell and tube heat exchanger (1) is used for heating low-temperature biomass fuel gas;
a primary combustion chamber (2) for burning high-temperature biomass gas;
a reduction chamber (3) for reducing the content of nitrogen oxides in the combustion exhaust gases;
an activation chamber (4) for activating the biomass charcoal particles and reducing the nitrogen oxide content;
a steam generator (5) for collecting heat of the high-temperature flue gas;
a secondary combustion chamber (6) for combusting combustible components in the low temperature flue gas;
the tubular heat exchanger (1) is arranged on the upper side of the reduction chamber (3), a primary combustion chamber (2) is arranged on the lower side of the reduction chamber (3), an activation chamber (4) is arranged on the upper side of the tubular heat exchanger (1), a steam generator (5) is arranged on the upper side of the activation chamber (4), and a secondary combustion chamber (6) is arranged on the upper side of the steam generator (5);
the shell and tube heat exchanger (1) is composed of a low-temperature biomass gas inlet (102), a high-temperature biomass gas outlet (103) and a first heat exchange tube (101), and the first heat exchange tube (101) is communicated with a first pressure equalizing chamber (403) and a reduction chamber (3).
2. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the primary combustion chamber (2) is composed of a first pressure-equalizing gas chamber (205), a first pressure-equalizing air chamber (202), a first hood (201) and a second hood (204), the first pressure-equalizing gas chamber (205) is located at the bottom of the primary combustion chamber (2), the second hood (204) is arranged on the upper portion of the first pressure-equalizing gas chamber (205), the first pressure-equalizing gas chamber (205) is communicated with the primary combustion chamber (2) through the second hood (204), the first pressure-equalizing air chamber (202) is located at the bottom of the first pressure-equalizing gas chamber (205), the first hood (201) is arranged on the upper portion of the first pressure-equalizing air chamber (202), the first pressure-equalizing air chamber (202) is communicated with the primary combustion chamber (2) through the first hood (201), and the first pressure-equalizing gas cap (201) penetrates through the first pressure-equalizing chamber (205).
3. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the reduction chamber (3) is composed of a second pressure-equalizing gas chamber (303), a third blast cap (301) and a high-temperature biomass gas second inlet (304), the upper portion of the reduction chamber (3) is communicated with the first heat exchange tube (101), the upper portion and the lower portion of the second pressure-equalizing gas chamber (303) are communicated with the third blast cap (301), the upper portion of the third blast cap (301) is communicated with the reduction chamber (3), the lower portion of the third blast cap (301) is communicated with the primary combustion chamber (2), the third blast cap (301) is provided with a small hole (302) inside the second pressure-equalizing gas chamber (303), and the high-temperature biomass gas second inlet (304) is communicated with the second pressure-equalizing gas chamber (303).
4. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the activation chamber (4) is composed of a first pressure equalizing chamber (403), a second pressure equalizing chamber (406), a fourth hood (401) and a fifth hood (405), the fifth hood (405) is arranged at the upper part of the second pressure equalizing chamber (406), the second pressure equalizing chamber (406) is communicated with the activation chamber (4) through the fifth hood (405), the bottom of the first pressure equalizing chamber (403) is communicated with a first heat exchange tube (101) of the shell and tube heat exchanger (1), the fourth hood (401) is arranged at the upper part of the first pressure equalizing chamber (403), the first pressure equalizing chamber (403) is communicated with the activation chamber (4) through the fourth hood (401), and the fourth hood (401) penetrates through the second pressure equalizing chamber (406).
5. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the steam generator (5) is composed of a water supply inlet (502), a steam outlet (503) and a second heat exchange tube (501), the upper portion of the second heat exchange tube (501) is communicated with a third pressure equalizing chamber (606), and the lower portion of the second heat exchange tube (501) is communicated with the activation chamber (4).
6. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the secondary combustion chamber (6) is composed of a third pressure equalizing chamber (606), a second pressure equalizing air chamber (602), a sixth hood (601) and a seventh hood (605), the sixth hood (601) is arranged at the upper part of the second pressure equalizing air chamber (602), the second pressure equalizing air chamber (602) is communicated with the secondary combustion chamber (6) through the sixth hood (601), the bottom of the third pressure equalizing chamber (606) is communicated with a second heat exchange tube (501) of the steam generator (5), the seventh hood (605) is arranged at the upper part of the third pressure equalizing chamber (606), the third pressure equalizing chamber (606) is communicated with the secondary combustion chamber (6) through the seventh hood (605), and the seventh hood (605) penetrates through the second pressure equalizing air chamber (602).
7. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the side of a first pressure-equalizing gas chamber (205) of the primary combustion chamber (2) is provided with a first high-temperature biomass gas inlet (206), and the side of a first pressure-equalizing air chamber (202) of the primary combustion chamber (2) is provided with a first air inlet (203).
8. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the side surface of the activation chamber (4) is provided with a biomass charcoal particle inlet (404) and an activated charcoal outlet (402), and the side surface of a second pressure equalizing chamber (406) of the activation chamber (4) is provided with a high-temperature air and water vapor inlet (407).
9. The low-nitrogen biomass gas combustion cooperative activated carbon activation system as claimed in claim 1, characterized in that: the side of the secondary combustion chamber (6) is provided with a flue gas outlet (604), and the side of a second pressure equalizing air chamber (602) of the secondary combustion chamber (6) is provided with a second air inlet (603).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728515A (en) * | 2020-12-30 | 2021-04-30 | 合肥德博生物能源科技有限公司 | Low-nitrogen biomass gas combustion and activated carbon activation system and method |
| CN114646048A (en) * | 2022-03-04 | 2022-06-21 | 山西三水能源股份有限公司 | Biomass gasification low-nitrogen combustion system and biomass gasification low-nitrogen combustion method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728515A (en) * | 2020-12-30 | 2021-04-30 | 合肥德博生物能源科技有限公司 | Low-nitrogen biomass gas combustion and activated carbon activation system and method |
| CN112728515B (en) * | 2020-12-30 | 2024-11-05 | 合肥德博生物能源科技有限公司 | Low-nitrogen biomass gas combustion synergistic activated carbon activation system and method |
| CN114646048A (en) * | 2022-03-04 | 2022-06-21 | 山西三水能源股份有限公司 | Biomass gasification low-nitrogen combustion system and biomass gasification low-nitrogen combustion method |
| CN114646048B (en) * | 2022-03-04 | 2024-04-26 | 山西三水能源股份有限公司 | Biomass gasification low-nitrogen combustion system and biomass gasification low-nitrogen combustion method |
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