CN218221831U - Flue gas denitration system of calcining furnace - Google Patents
Flue gas denitration system of calcining furnace Download PDFInfo
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- CN218221831U CN218221831U CN202222452123.1U CN202222452123U CN218221831U CN 218221831 U CN218221831 U CN 218221831U CN 202222452123 U CN202222452123 U CN 202222452123U CN 218221831 U CN218221831 U CN 218221831U
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Abstract
The utility model discloses a forge burning furnace flue gas denitration system. The utility model provides a forge burning furnace flue gas denitration system, including the ammonia holding vessel, forge burning furnace flue gas outlet, steam boiler, the desulfurizing tower, wet-type electrostatic precipitator, flue gas discharge chimney up to standard, be provided with flue gas conveying pipeline between calcination furnace flue gas outlet and the steam boiler, still include aqueous ammonia conveyor, compressed air conveyor, the aqueous ammonia atomizer of upper portion installation in the calcination furnace flue gas outlet, the aqueous ammonia atomizer of calcination furnace flue gas outlet lower part installation, forge burning furnace flue gas discharge on-line measuring device, still include electrical apparatus controlling means, electrical apparatus controlling means is controlled by PLC control system switch board. The utility model discloses a burning furnace flue gas nitrogen oxide's discharge to reach standard has realized the abundant denitration of burning furnace flue lower part flue gas, has improved burning furnace flue gas denitration efficiency.
Description
Technical Field
The utility model belongs to a burning furnace flue gas treatment's equipment, especially belong to a burning furnace flue gas denitration system.
Background
The nitrogen oxides contained in the flue gas of the calciner are mainly NO and NO2, and at present, the two nitrogen oxides of NO and NO2 are generally called nitrogen oxides NOx. Nitrogen oxides are one of the important pollution sources of the atmosphere, and the pollution hazard is very large. NOX can cause photochemical reaction under the action of sunlight to form photochemical smog, thereby causing serious atmospheric pollution and causing harm to human health. High levels of nitric acid rain, photochemical smog, ozone reduction, and other problems are associated with low NOX concentrations and are highly hazardous. Therefore, the requirements of national and local governments at all levels on the emission standard of nitrogen oxides are higher and higher, for example, the regional air pollution comprehensive emission standard (DB 37/2376-2019) in the Shandong province local standard issued by the Shandong province city administration and the Shandong province ecological environment hall in 2019, 6 and 3 days requires that the emission concentration limit of nitrogen oxides in a core control area is less than or equal to 50mg/m < 3 >, the emission concentration limit of nitrogen oxides in a key control area is less than or equal to 100mg/m < 3 >, and the emission concentration limit of nitrogen oxides in a general control area is less than or equal to 200mg/m < 3 >. How to realize calcining furnace flue gas nitrogen oxide discharge to reach standard, how to realize the abundant denitration of calcining furnace flue lower part flue gas, it is the problem that needs to be solved to improve calcining furnace flue lower part flue gas denitration efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provides a flue gas denitration system of a calcining furnace. By using the flue gas denitration system of the calcining furnace, the standard emission of the nitrogen oxides in the flue gas of the calcining furnace can be realized, the flue gas at the lower part of the flue of the calcining furnace can be fully denitrated, and the flue gas denitration efficiency of the flue of the calcining furnace is improved.
The utility model provides a technical scheme of above-mentioned technical problem is: the utility model provides a forge burning furnace flue gas denitration system, includes ammonia holding vessel, the export of burning furnace flue gas, steam boiler, desulfurizing tower, wet-type electrostatic precipitator, the flue gas discharge chimney of reaching standard, is provided with flue gas pipeline, characterized by between burning furnace flue gas export and the steam boiler: the device also comprises an ammonia water conveying device, a compressed air conveying device, an ammonia water spraying device arranged at the middle upper part of a flue gas outlet of a calcining furnace flue, an ammonia water spraying device arranged at the lower part of the flue gas outlet of the calcining furnace flue, an online detection device for flue gas emission of the calcining furnace and an electrical control device, wherein the electrical control device is controlled by a PLC control system control cabinet;
the ammonia water spraying device arranged at the middle upper part of the flue gas outlet of the calcining furnace flue comprises at least 3 upper ammonia water spray guns, the at least 3 upper ammonia water spray guns are respectively arranged on the flue wall at the middle upper part of the inner side of the flue gas outlet of the calcining furnace flue in a longitudinal fan-shaped surface mode by using mounting pieces, and at least 3 upper ammonia water spray gun muzzles which are arranged on the flue wall at the middle upper part of the inner side of the flue gas outlet of the calcining furnace flue in a longitudinal fan-shaped surface mode are exposed in the cavity at the inner side of the flue gas outlet of the calcining furnace flue; at least 3 upper ammonia water spray gun barrels are provided with parts correspondingly exposed in the space outside the flue gas outlet of the calcining furnace flue, and compressed air conveying short pipes are respectively and sequentially arranged on the parts, exposed in the space outside the flue gas outlet of the calcining furnace flue, of the upper ammonia water spray guns; still include aqueous ammonia spray gun aqueous ammonia blowout flow control device, compressed air blowout flow control device, aqueous ammonia spray gun aqueous ammonia blowout flow control device is the A solenoid valve, and 3 at least A solenoid valves use the connecting piece respectively in proper order with 3 at least go up the tip fixed connection that aqueous ammonia spray gun barrel is located the compressed air and carries the nozzle stub outside, compressed air blowout flow control device is the B solenoid valve, and 3 at least B solenoid valves use the connecting piece to install respectively in proper order and keep away from the tip fixed connection of aqueous ammonia spray gun barrel one side at 3 at least compressed air and carry the nozzle stub.
As a preferred technical scheme of the utility model, aqueous ammonia conveyor includes aqueous ammonia input pipeline section, the aqueous ammonia delivery pump, aqueous ammonia delivery pipeline section, corresponding at least 3 aqueous ammonia delivery branch pipeline sections that are at least 3 upper ammonia spray guns to carry the aqueous ammonia in proper order, the aqueous ammonia delivery pump uses the mount pad to install on the left steel-concrete ground platform of aqueous ammonia holding vessel, aqueous ammonia input pipeline section one end and the fixed position of aqueous ammonia holding vessel left side lower part link up sealing connection, the other end and aqueous ammonia delivery pump sunction inlet fixed sealing connection, the aqueous ammonia delivery pipeline section uses the vertical part tip that it has and the fixed sealing connection of aqueous ammonia delivery pump export, the horizontal part that aqueous ammonia delivery pipeline section used it to have spanes the calciner flue gas outlet, the ripple nozzle stub is being connected to fixed sealing under 3 at least aqueous ammonia delivery branch pipeline sections, at least 3 aqueous ammonia delivery branch pipeline sections use the ripple nozzle stub and the connecting piece of its lower tip respectively with the A solenoid valve fixed sealing connection that 3 upper ammonia delivery branch pipeline sections set gradually with at least, 3 aqueous ammonia delivery branch pipeline sections use its upper end vertical and the corresponding position fixed sealing connection of aqueous ammonia delivery pipeline section horizontal part lower part surface of aqueous ammonia delivery pipeline section respectively; and a blind plate is fixedly, hermetically and fixedly arranged at one end part of the transverse part of the ammonia water conveying pipeline section, which is far away from the vertical part of the ammonia water conveying pipeline section.
As an optimal technical scheme of the utility model, use the connecting piece to install aqueous ammonia delivery flow control solenoid valve and A electromagnetic flowmeter in proper order on the part that the horizontal part of aqueous ammonia pipeline section is close to its vertical portion, A electromagnetic flowmeter is for taking the A electromagnetic flowmeter of wireless data transport.
As an optimal technical scheme of the utility model, the compressed air conveying device comprises a compressed air conveying vertical pipeline section and a compressed air conveying transverse pipeline section, at least 3 compressed air conveying branch pipeline sections for conveying compressed air by at least 3 upper ammonia water spray guns are correspondingly arranged in sequence, the compressed air conveying transverse pipeline section stretches across the flue gas outlet of the calcining furnace flue by using a bracket and is arranged in the space at the lower side of the transverse part of the ammonia water conveying pipeline section, and two ends of the compressed air conveying transverse pipeline section are respectively fixedly, hermetically and fixedly provided with blind plates; the vertical pipeline section of compressed air conveying uses its lower tip and the horizontal pipeline section of compressed air conveying left side upper portion external surface fixed through sealing connection, the ripple nozzle stub of fixed sealing connection under 3 at least compressed air conveying branch pipeline sections, ripple nozzle stub and the connecting piece that 3 at least compressed air conveying branch pipeline sections used its lower tip respectively and the B solenoid valve fixed sealing connection that 3 at least compressed air conveying nozzle stub tip set gradually, 3 at least compressed air conveying branch pipeline sections use its upper end and the horizontal pipeline section of compressed air conveying lower part external surface fixed sealing connection.
As a preferred technical scheme of the utility model, use the connecting piece to install compressed air delivery flow control solenoid valve and B electromagnetic flowmeter in the part on compressed air delivery vertical pipeline section upper portion, B electromagnetic flowmeter is for taking the B electromagnetic flowmeter of wireless data transport.
As a preferred technical scheme of the utility model, the ammonia water spraying device installed at the lower part of the flue gas outlet of the calcining furnace flue comprises 2 lower ammonia water spray guns and 2C solenoid valves, wherein the 2 lower ammonia water spray guns are respectively installed on the left and right flue walls at the inner side of the lower part of the flue gas outlet of the calcining furnace flue in a splayed manner by using installation parts, and the gun ports of the 2 lower ammonia water spray guns installed on the left and right flue walls at the inner side of the lower part of the flue gas outlet of the calcining furnace flue in a splayed manner are exposed in the cavity of the flue gas outlet of the calcining furnace flue; compressed air conveying short pipes are respectively and sequentially arranged on the parts, corresponding to the 2 lower ammonia water spray guns, of the lower ammonia water spray guns exposed in the space outside the left flue gas outlet and the right flue gas outlet of the calcining furnace flue; the 2C electromagnetic valves are respectively and sequentially fixedly connected with the end parts of the gun tubes of the 2 lower ammonia water spray guns, which are positioned at the outer parts of the compressed air conveying short pipes, by using connecting pieces, and the D electromagnetic valves are respectively and sequentially installed at the end parts of the 2 compressed air conveying short pipes, which are far away from one sides of the gun tubes of the lower ammonia water spray guns, by using connecting pieces;
the ammonia water conveying device also comprises 2 ammonia water conveying branch pipeline sections which correspondingly and sequentially convey ammonia water for 2 lower ammonia water spray guns, the lower end parts of the 2 ammonia water conveying branch pipeline sections are respectively fixedly and hermetically connected with corrugated short pipes, the 2 ammonia water conveying branch pipeline sections are respectively and fixedly and hermetically connected with C electromagnetic valves sequentially arranged at the barrel ends of the 2 lower ammonia water spray guns by using the corrugated short pipes and connecting pieces at the lower end parts of the 2 ammonia water conveying branch pipeline sections, and the 2 ammonia water conveying branch pipeline sections are respectively and fixedly and hermetically connected with corresponding positions of the outer surfaces of the lower parts of the transverse parts of the ammonia water conveying pipeline sections by using the vertical upper end parts of the 2 ammonia water conveying branch pipeline sections;
the compressed air conveying device also comprises 2 compressed air branch pipeline sections which are correspondingly and sequentially used for conveying compressed air for 2 lower ammonia water spray guns, the lower end parts of the 2 compressed air conveying branch pipeline sections are respectively and fixedly and hermetically connected with corrugated short pipes, the 2 compressed air conveying branch pipeline sections respectively use the corrugated short pipes and connecting pieces at the lower end parts of the 2 compressed air conveying branch pipeline sections to be respectively and sequentially connected with D electromagnetic valves at the end parts of the 2 compressed air conveying short pipes, and the 2 compressed air conveying branch pipeline sections respectively use the corresponding position of the outer surfaces of the lower parts of the vertical and compressed air conveying transverse pipeline sections at the upper end parts of the compressed air conveying branch pipeline sections to be fixedly and hermetically connected.
As an optimized technical scheme of the utility model, forge burning furnace fume emission on-line measuring device and be flue gas on-line monitoring system equipment, flue gas on-line monitoring system equipment uses flange and connecting piece to install on the flue gas conveying pipeline who sets up between burning furnace flue gas export and steam boiler.
The flue gas on-line monitoring system equipment comprises temperature, flue gas pressure, flow velocity, sulfur dioxide, nitrogen oxide, oxygen content and smoke dust on-line monitoring, the flue gas on-line monitoring system equipment adopts the prior art, and an upper ammonia water spray gun and a lower ammonia water spray gun adopt the prior art; the PLC control system control cabinet adopts the prior art.
The beneficial effects of the utility model are that: because the utility model discloses set up ammonia holding vessel, forge burning furnace flue gas export, steam boiler, desulfurizing tower, wet-type electrostatic precipitator, flue gas emission chimney up to standard, be provided with flue gas pipeline, characterized by between burning furnace flue gas export and the steam boiler: the device also comprises an ammonia water conveying device, a compressed air conveying device, an ammonia water spraying device arranged at the middle upper part of a flue gas outlet of a calcining furnace flue, an ammonia water spraying device arranged at the lower part of the flue gas outlet of the calcining furnace flue, an online detection device for flue gas emission of the calcining furnace, and an electrical appliance control device, wherein the electrical appliance control device is controlled by a PLC control system control cabinet. The utility model discloses a burning furnace flue gas nitrogen oxide's discharge to reach standard has realized the abundant denitration of burning furnace flue lower part flue gas, has improved burning furnace flue gas denitration efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises an ammonia water storage tank, 2 flue gas outlets of a calcinator, 3 steam boilers, 4 desulfurizing towers, 5 wet electric dust collectors, 6 flue gas emission chimney reaching the standard, 7 flue gas conveying pipelines, 8 upper ammonia water spray guns, 9 compressed air conveying short pipes, 10.A solenoid valves, 11.B solenoid valves, 12 ammonia water input pipeline sections, 13 ammonia water conveying pumps, 14 ammonia water conveying pipeline sections, 15 ammonia water conveying branch pipeline sections, 16 ammonia water conveying flow control solenoid valves, 17.A solenoid valves, 18 compressed air conveying vertical pipeline sections, 19 compressed air conveying transverse pipeline sections, 20 compressed air conveying branch pipeline sections, 21 compressed air conveying flow control solenoid valves, 22.B solenoid valves, 23 lower ammonia water spray guns, 24.C solenoid valves, 25.D solenoid valves and 26 flue gas online monitoring system equipment.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1, the technical solution to solve the above technical problems of the present invention is: a flue gas denitration system of a calcining furnace comprises an ammonia water storage tank 1, a flue gas outlet 2 of the calcining furnace flue, a steam boiler 3, a desulfurizing tower 4, a wet electric dust remover 5 and a standard flue gas discharge chimney 6, wherein a flue gas conveying pipeline 7 is arranged between the flue gas outlet 2 of the calcining furnace flue and the steam boiler 3;
the ammonia water spraying device arranged at the middle upper part of the flue gas outlet of the calcining furnace flue comprises 3 upper ammonia water spray guns 8, 3 upper ammonia water spray guns 8 are respectively arranged on the flue wall at the middle upper part of the inner side of the flue gas outlet 2 of the calcining furnace flue in sequence in a longitudinal fan-shaped surface by using mounting pieces, and the gun mouths of the 3 upper ammonia water spray guns 8 which are arranged on the flue wall at the middle upper part of the inner side of the flue gas outlet 2 of the calcining furnace flue in sequence in a longitudinal fan-shaped surface are exposed in the cavity at the inner side of the flue gas outlet 2 of the calcining furnace flue; the 3 upper ammonia water spray guns 8 are provided with corresponding parts exposed in the space outside the flue gas outlet 2 of the calcining furnace, and the compressed air conveying short pipes 9 are respectively and sequentially arranged on the parts of the 3 upper ammonia water spray guns 8, which are exposed in the space outside the flue gas outlet 2 of the calcining furnace, of the ammonia water spray gun barrels; still include aqueous ammonia spray gun aqueous ammonia blowout flow control device, compressed air blowout flow control device, aqueous ammonia spray gun aqueous ammonia blowout flow control device is A solenoid valve 10,3 individual A solenoid valves 10 use respectively the connecting piece in proper order with 3 go up 8 barrels of aqueous ammonia spray gun and be located the tip fixed connection in the compressed air transport nozzle stub 9 outside, compressed air blowout flow control device is B solenoid valve 11,3 individual B solenoid valve 11 uses the connecting piece to install respectively in proper order and carries nozzle stub 9 to keep away from the tip fixed connection of 8 barrel one sides of aqueous ammonia spray gun in 3 compressed air. The utility model discloses the denitration chemical equation of calciner flue gas denitration system does: 4NH3+6N0=5N2+6H20, the utility model discloses set up ammonia holding vessel, forge burning furnace flue gas outlet, steam boiler, desulfurizing tower, wet-type electrostatic precipitator, up to standard flue gas emission chimney, be provided with flue gas conveying pipeline between calcination furnace flue gas outlet and the steam boiler, still include aqueous ammonia conveyor, compressed air conveyor, the aqueous ammonia atomizer of the upper portion installation in the calcination furnace flue gas outlet, the aqueous ammonia atomizer of calcination furnace flue gas outlet lower part installation, forge burning furnace flue gas emission on-line measuring device, still include electrical apparatus controlling means, electrical apparatus controlling means is controlled by PLC control system switch board; the utility model discloses calcining furnace flue gas denitration system denitrification facility principle uses concentration to be 20% aqueous ammonia to be the reductant, send 20% aqueous ammonia to calcining furnace flue gas outlet by aqueous ammonia holding vessel through aqueous ammonia conveyor through aqueous ammonia atomizer, spray into vaporific with compressed air concentration for 20% aqueous ammonia through aqueous ammonia atomizer, inside atomizing dense aqueous ammonia sprayed calcining furnace flue gas outlet, fully combines the reaction with the nitrogen oxide in the flue gas, realizes calcining furnace flue gas denitration; according to the requirements of national and local governments on emission standards of nitrogen oxides, the flue gas temperature, the flue gas pressure, the flow rate, sulfur dioxide, nitrogen oxides, the oxygen content and smoke dust of a flue of a denitration calciner are detected by a calciner flue gas emission online detection device, the data of the nitrogen oxides detected online by the calciner flue gas emission online detection device is compared with the requirements of the national and local governments on the emission standards of the nitrogen oxides, the ammonia water input with the concentration of 20 percent is adjusted by a PLC control system control cabinet, the safe and economical operation of flue gas denitration equipment is realized, and the flue gas temperature of the calciner is 900-1100 ℃; the concentrated ammonia with the concentration of 20% is hydrothermally decomposed into NH3, and the NH3 reacts with NOx in the flue gas of the calcining furnace to generate N2 and water, so that the aim of reducing and controlling the NOx emission index of the flue gas of the calcining furnace is fulfilled, and the standard emission of the NOx in the flue gas of the calcining furnace is fulfilled.
In this embodiment, as shown in fig. 1, the ammonia water transportation device includes an ammonia water input pipeline section 12, an ammonia water transportation pump 13, an ammonia water transportation pipeline section 14, and 3 corresponding ammonia water transportation branch pipeline sections 15 for sequentially transporting the ammonia water by 3 upper ammonia water spray guns 8, the ammonia water transportation pump 13 is installed on a steel-concrete floor on the left side of the ammonia water storage tank 1 by using a mounting seat (an observer faces the utility model discloses the drawing figure 1 rotates 90 counterclockwise, the left side of the observer is the left side of the ammonia water storage tank, and the right side of the observer is the right side of the ammonia water storage tank), one end of the ammonia water input pipeline section 12 is fixedly connected with the lower part of the left side of the ammonia water storage tank 1 in a penetrating and sealing manner, the other end is fixedly connected with a suction inlet of the ammonia water transportation pump 13 in a sealing manner, the ammonia water transportation pipeline section 14 uses the lower end of the vertical part of the ammonia water transportation pipeline section 14 to be fixedly connected with an output port of the ammonia water transportation pump 13 in a sealing manner, the ammonia water transportation pipeline section 14 uses the horizontal part of the ammonia water transportation pipeline section to span over the flue gas outlet of the calcining furnace flue 2, the lower end of the horizontal part of the ammonia water transportation pipeline section 15 uses the horizontal part of the short pipe section 15 to be fixedly connected with the short pipe of the ammonia water transportation pipeline section 15, the short pipe 15, the corresponding electromagnetic valve of the horizontal part of the short pipe of the horizontal part of the ammonia water transportation pipeline section 15 to be connected with the corresponding short pipe of the upper end of the corresponding electromagnetic valve of the corresponding ammonia water transportation pipeline section of the upper end of the short pipe 10 a short pipe of the ammonia water transportation pipeline section of the ammonia water transport section 10 a short pipe which is connected with the upper end of the horizontal part of the corresponding short pipe which is respectively used to be connected with the short pipe of the short pipe which is respectively, the short pipe of the short pipe 14; and a blind plate is fixedly, hermetically and fixedly arranged at one end part of the transverse part of the ammonia water conveying pipeline section 14, which is far away from the vertical part of the transverse part of the ammonia water conveying pipeline section. The ammonia water input pipeline section 12, the ammonia water delivery pump 13, the ammonia water delivery pipeline section 14 and the 3 ammonia water delivery branch pipeline sections 15 of the ammonia water delivery device are arranged and connected with the installation structure, so that the ammonia water spraying device arranged at the middle upper part of the flue gas outlet of the calcining furnace flue effectively delivers the ammonia water with the concentration of 20% for flue gas denitration at the flue gas outlet of the calcining furnace flue.
In this embodiment, as shown in fig. 1, an ammonia water transportation flow control solenoid valve 16 and an electromagnetic flowmeter a 17 are sequentially mounted on a portion of the horizontal portion of the ammonia water transportation pipe section 14 near the vertical portion thereof using a connector. The PLC control system control cabinet controls the opening of an ammonia water conveying flow control electromagnetic valve 16 to adjust the conveying input quantity of ammonia water with the concentration of 20% according to the online detection nitrogen oxide data displayed by the online detection device for the flue gas emission of the calcining furnace and the ammonia water conveying quantity displayed by an A electromagnetic flowmeter 17, so that the conveying input quantity of the ammonia water with the concentration of 20% and NOx in the flue gas of the calcining furnace are fully reacted to generate N2 and water, and the standard emission of the nitrogen oxide in the flue gas of the calcining furnace is achieved.
In this embodiment, as shown in fig. 1, the compressed air conveying device includes a compressed air conveying vertical pipeline section 18, a compressed air conveying horizontal pipeline section 19, and 3 compressed air conveying branch pipeline sections 20 corresponding to the upper ammonia water spray guns 8 for conveying compressed air in sequence, the compressed air conveying horizontal pipeline section 18 is installed in a space below the horizontal part of the ammonia water conveying pipeline section 14 by crossing the flue gas outlet 2 of the calciner with a support, and two ends of the compressed air conveying horizontal pipeline section 19 are respectively and fixedly and hermetically installed with a blind plate; the vertical pipeline section 18 of compressed air conveying uses its lower tip and 19 left side upper portion outer surface fixed link up sealing connection of horizontal pipeline section of compressed air conveying, the ripple nozzle stub is being fixed sealing connection under 3 compressed air conveying branch pipeline sections 20, 3 compressed air conveying branch pipeline sections 20 use the ripple nozzle stub and the connecting piece of its lower tip respectively and 3 compressed air conveying nozzle stub 9 tip B solenoid valve 11 fixed sealing connection that set gradually, 3 compressed air conveying branch pipeline sections 20 use its upper end and 19 lower part outer surface relevant position fixed sealing connection of horizontal pipeline section of compressed air conveying. The compressed air conveying vertical pipeline section 18, the compressed air conveying transverse pipeline section 19 and the 3 compressed air conveying branch pipeline sections 20 of the compressed air conveying device are arranged and connected with the mounting structure, so that the compressed air conveying input required by spraying 20% of ammonia water with the atomization concentration by the 3 upper ammonia water spray guns 8 is effectively realized.
In this embodiment, as shown in fig. 1, a compressed air delivery flow control solenoid valve 21 and a B electromagnetic flowmeter 22 are mounted in this order on the upper portion of the compressed air delivery vertical pipe section using a connector. The PLC control system control cabinet controls the opening of a compressed air delivery flow electromagnetic valve 21 to adjust the delivery input amount of the compressed air according to the delivery input amount of the compressed air displayed by the B electromagnetic flowmeter 22 and the input amount of the ammonia water with the concentration of 20% required by the standard emission of the nitrogen oxides in the flue gas of the calcining furnace, so as to match the delivery input amount of the ammonia water with the concentration of 20% required by the standard emission of the nitrogen oxides in the flue gas of the calcining furnace.
In this embodiment, as shown in fig. 1, as a preferred technical solution of the present invention, the ammonia water spraying device installed at the lower part of the flue gas outlet of the calcining furnace flue comprises 2 lower ammonia water spray guns 23, 2C solenoid valves 24,2 lower ammonia water spray guns 23 are respectively installed on the left and right flue walls at the inner side of the lower part of the flue gas outlet 2 of the calcining furnace flue in a splayed shape by using installation parts, and 2 lower ammonia water spray gun muzzles installed on the left and right flue walls at the inner side of the lower part of the flue gas outlet 2 of the calcining furnace flue in a splayed shape are exposed in the flue gas outlet cavity of the calcining furnace flue; compressed air conveying short pipes are respectively and sequentially arranged on the parts, corresponding to the 2 lower ammonia water spray guns, of the lower ammonia water spray gun parts 23 exposed in the space outside the left flue gas outlet and the right flue wall of the calcining furnace flue gas outlet 2; the 2C electromagnetic valves 24 are respectively fixedly connected with the end parts of the gun barrels of the 2 lower ammonia water spray guns 23, which are positioned at the outer parts of the compressed air conveying short pipes, by connecting pieces in sequence, and the D electromagnetic valves 25 are respectively and sequentially installed at the end parts of one sides of the 2 compressed air conveying short pipes, which are far away from the gun barrels of the lower ammonia water spray guns, by using the connecting pieces; 2 lower ammonia water spray guns 23 of an ammonia water spraying device arranged at the lower part of a flue gas outlet of a calcining furnace flue spray port spray ammonia water with the concentration of 20% into a fog shape through compressed air, and atomized strong ammonia water is sprayed into the inner part of the middle lower part of the flue gas outlet of the calcining furnace flue; the nitrogen oxides of the flue gas of the calcining furnace at the lower part of the flue gas outlet of the calcining furnace flue are combined and reacted, and the nitrogen oxides are combined and reacted with the nitrogen oxides of the flue gas of the calcining furnace at the lower part of the flue gas outlet of the calcining furnace flue, wherein the 3 upper ammonia water spray guns 8 of the ammonia water spraying device arranged at the middle upper part of the flue gas outlet of the calcining furnace flue spray the ammonia water with the concentration of 20 percent into a fog shape through compressed air, and atomized strong ammonia water is sprayed into the middle upper part of the flue gas outlet of the calcining furnace flue and is combined and reacted with the nitrogen oxides of the flue gas of the calcining furnace at the lower part of the flue gas outlet of the calcining furnace flue; the ammonia water spraying device arranged at the lower part of the flue gas outlet of the calcining furnace is matched with the ammonia water spraying device arranged at the middle upper part of the flue gas outlet of the calcining furnace, so that the aim of reducing and controlling the NOx emission index of the flue gas of the calcining furnace is fulfilled, the standard emission of the NOx in the flue gas of the calcining furnace is fulfilled, the flue gas at the lower part of the flue gas of the calcining furnace is fully denitrated, and the denitration efficiency of the flue gas of the calcining furnace is improved;
the ammonia water conveying device also comprises 2 ammonia water conveying branch pipeline sections 15 correspondingly and sequentially conveying ammonia water for 2 lower ammonia water spray guns 23, the lower end parts of the 2 ammonia water conveying branch pipeline sections 15 are respectively fixedly and hermetically connected with corrugated short pipes, the 2 ammonia water conveying branch pipeline sections 15 are respectively and fixedly and hermetically connected with C electromagnetic valves 24 sequentially arranged at the barrel ends of the 2 lower ammonia water spray guns 23 through the corrugated short pipes and connecting pieces at the lower end parts of the 2 ammonia water conveying branch pipeline sections, and the 2 ammonia water conveying branch pipeline sections 15 are respectively and fixedly and hermetically connected with corresponding positions of the outer surfaces of the lower parts of the transverse parts of the ammonia water conveying pipeline sections 14 through the vertical upper end parts of the 2 ammonia water conveying branch pipeline sections;
compressed air conveyor still includes corresponding 2 compressed air branch pipeline sections 20 who is 2 aqueous ammonia spray guns 23 transport compressed air down in proper order, this 2 compressed air transport branch pipeline sections 20 lower tip is fixed sealing connection respectively the ripple nozzle stub, 2 compressed air transport branch pipeline sections 20 use respectively its ripple nozzle stub and the connecting piece of tip down respectively with 2 compressed air transport nozzle stub 25 fixed sealing connection that the tip set gradually, 2 compressed air transport branch pipeline sections 20 use respectively its upper end vertical and 19 lower part surface relevant positions fixed sealing connection of compressed air transport horizontal pipeline section 19.
In this embodiment, as shown in fig. 1, the online emission detection device of the flue gas of the calciner is an online flue gas monitoring system device 25, and an online flue gas monitoring system device 26 is mounted on the flue gas conveying pipe 7 arranged between the flue gas outlet of the calciner and the steam boiler by using a flange and a connecting piece.
The foregoing is a preferred embodiment of the present invention and the description of the specific embodiments is only for better understanding of the idea of the invention. Modifications and equivalents may be made in accordance with the principles of the present invention which are also considered to fall within the scope of the invention. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.
Claims (7)
1. The utility model provides a forge burning furnace flue gas denitration system, includes ammonia holding vessel, the export of burning furnace flue gas, steam boiler, desulfurizing tower, wet-type electrostatic precipitator, the flue gas discharge chimney of reaching standard, is provided with flue gas pipeline, characterized by between burning furnace flue gas export and the steam boiler: the device also comprises an ammonia water conveying device, a compressed air conveying device, an ammonia water spraying device arranged at the middle upper part of a flue gas outlet of a calcining furnace flue, an ammonia water spraying device arranged at the lower part of the flue gas outlet of the calcining furnace flue, an online detection device for flue gas emission of the calcining furnace and an electrical control device, wherein the electrical control device is controlled by a PLC control system control cabinet;
the ammonia water spraying device arranged at the middle upper part of the flue gas outlet of the calcining furnace flue comprises at least 3 upper ammonia water spray guns, the at least 3 upper ammonia water spray guns are respectively arranged on the flue wall at the middle upper part of the inner side of the flue gas outlet of the calcining furnace flue in a longitudinal fan-shaped surface mode by using mounting pieces, and at least 3 upper ammonia water spray gun muzzles which are arranged on the flue wall at the middle upper part of the inner side of the flue gas outlet of the calcining furnace flue in a longitudinal fan-shaped surface mode are exposed in the cavity at the inner side of the flue gas outlet of the calcining furnace flue; at least 3 upper ammonia water spray gun barrels are provided with parts correspondingly exposed in the space outside the flue gas outlet of the calcining furnace flue, and compressed air conveying short pipes are respectively and sequentially arranged on the parts of the at least 3 upper ammonia water spray guns exposed in the space outside the flue gas outlet of the calcining furnace flue; still include aqueous ammonia spray gun aqueous ammonia blowout flow control device, compressed air blowout flow control device, aqueous ammonia spray gun aqueous ammonia blowout flow control device is the A solenoid valve, and 3 at least A solenoid valves use the connecting piece respectively in proper order with 3 at least go up the tip fixed connection that aqueous ammonia spray gun barrel is located the compressed air and carries the nozzle stub outside, compressed air blowout flow control device is the B solenoid valve, and 3 at least B solenoid valves use the connecting piece to install respectively in proper order and keep away from the tip fixed connection of aqueous ammonia spray gun barrel one side at 3 at least compressed air and carry the nozzle stub.
2. The flue gas denitration system of a calcining furnace as claimed in claim 1, characterized in that: the ammonia water conveying device comprises an ammonia water input pipeline section, an ammonia water conveying pump, an ammonia water conveying pipeline section, at least 3 ammonia water conveying branch pipeline sections which correspond to at least 3 upper ammonia water spray guns and convey ammonia water in sequence, wherein the ammonia water conveying pump is installed on a steel concrete floor platform on the left side of an ammonia water storage tank by using an installation seat, one end of the ammonia water input pipeline section is fixedly communicated and hermetically connected with the lower part of the left side of the ammonia water storage tank, the other end of the ammonia water input pipeline section is fixedly and hermetically connected with a suction inlet of the ammonia water conveying pump, the end part of a vertical part of the ammonia water conveying pipeline section is fixedly and hermetically connected with an outlet of the ammonia water conveying pump, the horizontal part of the ammonia water conveying pipeline section crosses a flue gas outlet of a calcining furnace by using the horizontal part of the ammonia water conveying pipeline section, the lower ends of the 3 ammonia water conveying branch pipeline sections are fixedly and hermetically connected with corrugated short pipes, the corrugated short pipes and connecting pieces of the lower ends of the 3 ammonia water conveying branch pipeline sections are respectively fixedly and hermetically connected with A electromagnetic valves which are sequentially arranged at least 3 upper ammonia water barrel spray guns, and the corresponding positions of the horizontal part of the outer surface of the upper end part of the at least 3 ammonia water conveying branch pipeline sections are fixedly and hermetically connected respectively; and a blind plate is fixedly, hermetically and fixedly arranged at one end part of the transverse part of the ammonia water conveying pipeline section, which is far away from the vertical part of the ammonia water conveying pipeline section.
3. The flue gas denitration system of the calcining furnace as claimed in claim 2, which is characterized in that: the ammonia water conveying pipeline is characterized in that the part, close to the vertical part of the ammonia water conveying pipeline, of the transverse part is sequentially provided with an ammonia water conveying flow control electromagnetic valve and an electromagnetic flowmeter A through a connecting piece, and the electromagnetic flowmeter A is an electromagnetic flowmeter A with wireless data conveying function.
4. The flue gas denitration system of a calcining furnace as claimed in claim 1, characterized in that: the compressed air conveying device comprises a compressed air conveying vertical pipeline section, a compressed air conveying transverse pipeline section and at least 3 compressed air conveying branch pipeline sections which correspond to at least 3 upper ammonia water spray guns to convey compressed air in sequence, the compressed air conveying transverse pipeline section stretches across a flue gas outlet of a flue of the calcining furnace through a support and is arranged in a space on the lower side of the transverse part of the ammonia water conveying pipeline section, and two ends of the compressed air conveying transverse pipeline section are fixedly and hermetically provided with blind plates respectively; the vertical pipeline section of compressed air conveying uses its lower tip and the horizontal pipeline section of compressed air conveying left side upper portion external surface fixed through sealing connection, the ripple nozzle stub of fixed sealing connection under 3 at least compressed air conveying branch pipeline sections, ripple nozzle stub and the connecting piece that 3 at least compressed air conveying branch pipeline sections used its lower tip respectively and the B solenoid valve fixed sealing connection that 3 at least compressed air conveying nozzle stub tip set gradually, 3 at least compressed air conveying branch pipeline sections use its upper end and the horizontal pipeline section of compressed air conveying lower part external surface fixed sealing connection.
5. The flue gas denitration system of the calcining furnace as claimed in claim 4, which is characterized in that: the upper part of the compressed air conveying vertical pipeline section is provided with a compressed air conveying flow control electromagnetic valve and a B electromagnetic flowmeter by using a connecting piece, and the B electromagnetic flowmeter is provided with a B electromagnetic flowmeter for wireless data conveying.
6. The flue gas denitration system of a calcining furnace as claimed in claim 1, characterized in that: the ammonia water spraying device arranged at the lower part of the flue gas outlet of the calcining furnace comprises 2 lower ammonia water spray guns and 2C electromagnetic valves, wherein the 2 lower ammonia water spray guns are respectively arranged on the left and right flue walls arranged at the inner side of the lower part of the flue gas outlet of the calcining furnace in a splayed manner by using mounting pieces, and gun ports of the 2 lower ammonia water spray guns arranged on the left and right flue walls at the inner side of the lower part of the flue gas outlet of the calcining furnace in a splayed manner are exposed in the cavity of the flue gas outlet of the calcining furnace; compressed air conveying short pipes are respectively and sequentially arranged on the parts, corresponding to the 2 lower ammonia water spray guns, of the lower ammonia water spray guns exposed in the space outside the left flue gas outlet and the right flue gas outlet of the calcining furnace flue; the 2C electromagnetic valves are respectively and sequentially fixedly connected with the end parts of the gun tubes of the 2 lower ammonia water spray guns, which are positioned at the outer parts of the compressed air conveying short pipes, by using connecting pieces, and the D electromagnetic valves are respectively and sequentially installed at the end parts of the 2 compressed air conveying short pipes, which are far away from one sides of the gun tubes of the lower ammonia water spray guns, by using connecting pieces;
the ammonia water conveying device also comprises 2 ammonia water conveying branch pipeline sections which correspondingly and sequentially convey ammonia water for 2 lower ammonia water spray guns, the lower end parts of the 2 ammonia water conveying branch pipeline sections are respectively fixedly and hermetically connected with corrugated short pipes, the 2 ammonia water conveying branch pipeline sections are respectively fixedly and hermetically connected with C electromagnetic valves sequentially arranged at the barrel ends of the 2 lower ammonia water spray guns by using the corrugated short pipes and connecting pieces at the lower end parts of the 2 ammonia water conveying branch pipeline sections, and the 2 ammonia water conveying branch pipeline sections are respectively fixedly and hermetically connected with corresponding positions of the outer surfaces of the lower parts of the transverse parts of the ammonia water conveying pipeline sections by using the vertical upper end parts of the 2 ammonia water conveying branch pipeline sections;
the compressed air conveying device also comprises 2 compressed air branch pipeline sections which are correspondingly and sequentially used for conveying compressed air for 2 lower ammonia water spray guns, the lower end parts of the 2 compressed air conveying branch pipeline sections are respectively and fixedly and hermetically connected with corrugated short pipes, the 2 compressed air conveying branch pipeline sections respectively use the corrugated short pipes and connecting pieces at the lower end parts of the 2 compressed air conveying branch pipeline sections to be respectively and sequentially connected with D electromagnetic valves at the end parts of the 2 compressed air conveying short pipes, and the 2 compressed air conveying branch pipeline sections respectively use the corresponding position of the outer surfaces of the lower parts of the vertical and compressed air conveying transverse pipeline sections at the upper end parts of the compressed air conveying branch pipeline sections to be fixedly and hermetically connected.
7. The flue gas denitration system of a calcining furnace as claimed in claim 1, characterized in that: the calcining furnace flue gas emission online detection device is flue gas online monitoring system equipment which is arranged on a flue gas conveying pipeline arranged between a flue gas outlet of a calcining furnace flue and a steam boiler by using a flange and a connecting piece.
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| CN202222452123.1U CN218221831U (en) | 2022-09-16 | 2022-09-16 | Flue gas denitration system of calcining furnace |
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| CN202222452123.1U CN218221831U (en) | 2022-09-16 | 2022-09-16 | Flue gas denitration system of calcining furnace |
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