CN209865776U - Medium-temperature type denitration system for smoke of multiple gas internal combustion engines - Google Patents
Medium-temperature type denitration system for smoke of multiple gas internal combustion engines Download PDFInfo
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- CN209865776U CN209865776U CN201920075416.8U CN201920075416U CN209865776U CN 209865776 U CN209865776 U CN 209865776U CN 201920075416 U CN201920075416 U CN 201920075416U CN 209865776 U CN209865776 U CN 209865776U
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Abstract
The utility model discloses a medium temperature type deNOx systems for many gas internal-combustion engine flue gases, including gas boiler, many gas internal-combustion engine, exhaust-heat boiler, SCR reactor, catalyst, first chimney, ammonia generater, urea solution jar, compressed air jar, urea solution pipe, compressed air pipe, spray gun, a plurality of governing valve, many fans, bypass flue, flue and many lithium bromide equipment. An ammonia generator is arranged and comprises an ammonia generator inner wall, a first effect-lifting ring, a first flow disturbing cone, a second effect-lifting ring, a third effect-lifting ring and a second flow disturbing cone. This system adopts one set of exhaust-heat boiler and SCR reaction integrated equipment to carry out nitrogen oxide to administer after converging many gas internal-combustion engine flue gases, and this system efficiency is high, succinct, compact, saves a large amount of areas and space, has practiced thrift construction cost and operation cost, the utility model discloses still related to an ammonia generater and prepared the ammonia to through the ammonia conversion rate to improving the urea to the optimal design of ammonia generater structure.
Description
Technical Field
The utility model relates to a medium temperature type deNOx systems of many gas internal-combustion engine flue gases belongs to gas internal-combustion engine flue gas denitration field.
Background
The gas internal combustion engine is widely applied to energy-intensive areas such as municipal administration, industrial parks, commercial properties, buildings, hospitals, schools and the like, realizes the gradient high-efficiency utilization of energy through the combined supply of three energy modes of heat, electricity and cold, and has the characteristics of flexibility, high efficiency, low emission and the like. The special application occasions provide higher requirements for the standard emission of the nitrogen oxides in the smoke of the gas internal combustion engine.
The method has high requirements for meeting the standard emission standard of the nitrogen oxide in the flue gas of the gas internal combustion engine, selects a common denitration process technology such as a selective non-catalytic reduction process (SNCR denitration process technology) which can not meet the requirements, needs to adopt the selective catalytic reduction process technology (SCR denitration process technology), is also the mainstream nitrogen oxide treatment technology at present, and utilizes a reducing agent (such as NH)3CO, etc.) on the surface of the catalyst, and converts the nitrogen oxide into nitrogen by virtue of the catalytic action of the catalyst, thereby achieving the purpose of reducing the emission of the nitrogen oxide.
In the existing technical scheme related to flue gas denitration of a gas internal combustion engine, a patent number CN108744970A discloses a combined denitration system of a gas boiler and a methane internal combustion engine, and although the technology relates to the problem of combined denitration of the gas boiler and the methane internal combustion engine, the technology does not mention the utilization of the waste heat of the flue gas of the gas boiler and the internal combustion engine, and also does not relate to the problem of generation of reducing agent ammonia; patent No. CN106762064A discloses a distributed energy denitration and silencing integrated device for a gas internal combustion engine, which relates to the utilization of the waste heat of flue gas of the gas internal combustion engine, but the technology does not relate to the problem of generating ammonia gas as a reducing agent. Neither of the above two technical schemes relates to the problem of combined denitration of a plurality of gas internal combustion engines.
CN108744970A and CN106762064A are used for denitration of a gas internal combustion engine respectively, and a lithium bromide device and a heat exchanger are not arranged in CN108744970A, so that the energy efficiency is low, simultaneous cooling and heating cannot be realized, and energy conservation cannot be realized. CN106762064A adopts a distributed structure, and the function of the distributed structure is relatively single, and meanwhile, no ammonia generation related equipment is involved.
For the problem of solving many gas internal-combustion engines or gas boiler flue gas and jointly denitration and the formation problem of required reductant ammonia among the gas internal-combustion engine flue gas denitration system, the utility model provides a be used for many gas internal-combustion engine flue gas medium temperature type denitration system, this system adopt one set of exhaust-heat boiler and SCR reaction integrated equipment to carry out nitrogen oxide and administer after converging many gas internal-combustion engine flue gases, this system efficiency is high, succinct, compact, saves a large amount of areas and space, has practiced thrift construction cost and operation cost, the utility model discloses still relate to an ammonia generater and prepare the ammonia to through the ammonia conversion rate that improves urea to the optimal design to ammonia generater structure.
Disclosure of Invention
The utility model discloses a main aim at solves many gas internal-combustion engines or gas boiler flue gas denitration problem.
In order to achieve the above object, the utility model discloses a technical scheme be a medium temperature type deNOx systems for many gas internal-combustion engine flue gases, including gas boiler exhaust port 1, exhaust-heat boiler 2, SCR reactor 3, catalyst 4, first chimney 5, ammonia generator 6, urea solution jar 7, compressed air jar 8, urea solution pipe 9, compressed air pipe 10, spray gun 11, first governing valve 12, first fan 13, bypass flue 14, flue 15, first gas internal-combustion engine exhaust port 16, second gas internal-combustion engine exhaust port 17, Mth gas internal-combustion engine exhaust port 18, first lithium bromide equipment 19, second lithium bromide equipment 20, third lithium bromide equipment 21, Nth lithium bromide equipment 22, second fan 23, third fan 24, fourth fan 25, Nth fan 26, second governing valve 27, third governing valve 28, fourth governing valve 29, the, An nth regulating valve 30, a second chimney 31, a third chimney 32 and an lth chimney 33; m, N and L are positive integers, and the three positive integers may not be the same.
The smoke exhaust port 1 of the gas-fired boiler is connected with the waste heat boiler 2 through a flue 15; a smoke outlet 16 of the first gas internal combustion engine is connected with the waste heat boiler 2 through a flue 15; the smoke outlet 17 of the second gas internal combustion engine is connected with the waste heat boiler 2 through a flue 15; the smoke outlet 18 of the Mth gas internal combustion engine is connected with the waste heat boiler 2 through a flue 15; the smoke exhaust port 1 of the gas boiler, the smoke exhaust port 16 of the first gas internal combustion engine, the smoke exhaust port 17 of the second gas internal combustion engine and the smoke exhaust port 18 of the Mth gas internal combustion engine are connected in parallel.
The waste heat boiler 2 is connected with the SCR reactor 3 through a flue 15; the catalyst 4 is arranged in the SCR reactor 3; the SCR reactor 3 is connected with a second fan 23 through a flue 15; the SCR reactor 3 is connected with a third fan 24 through a flue 15; the SCR reactor 3 is connected with a fourth fan 25 through a flue 15; the SCR reactor 3 is connected with an Nth fan 26 through a flue 15; the second fan 23, the third fan 24, the fourth fan 25 and the nth fan 26 are connected in parallel;
the second fan 23 is connected with a second regulating valve 27 through the flue 15; the second regulating valve 27 is connected with the first lithium bromide device 19 through the flue 15; the first lithium bromide device 19 is connected with the first chimney 5 through the flue 15;
the third fan 24 is connected with a third regulating valve 28 through the flue 15; the third regulating valve 28 is connected with the second lithium bromide device 20 through the flue 15; the second lithium bromide device 20 is connected with a second chimney 31 through a flue 15;
the fourth fan 25 is connected with a fourth regulating valve 29 through the flue 15; the fourth regulating valve 29 is connected with the third lithium tribromide device 21 through the flue 15; the third lithium tribromide apparatus 21 is connected to a third chimney 32 through a flue 15;
the Nth fan 26 is connected with the Nth regulating valve 30 through the flue 15; the fourth regulating valve 29 is connected with the Nth lithium bromide device 22 through the flue 15; the nth lithium bromide device 22 is connected to the L-th chimney 33 through the flue 15.
One end of the bypass flue 14 is arranged on a flue 15 between the smoke exhaust port 1 of the gas boiler and the waste heat boiler 2, and the other end of the bypass flue 14 is arranged on the flue 15 in front of the SCR reactor 3.
The smoke exhaust port 1 of the gas-fired boiler is connected with a first fan 13 through a flue 15 and a bypass flue 14; the first fan 13 is connected with the ammonia gas generator 6 through a bypass flue 14 and a first regulating valve 12; the ammonia gas generator 6 is connected with the SCR reactor 3 through a bypass flue 14 and a flue 15; the urea solution tank 7 is connected with a spray gun 11 through a urea solution pipe 9; the compressed air tank 8 is connected with the spray gun 11 through a compressed air pipe 10; the lance 11 is inserted into the ammonia gas generator 6 in the vertical axial direction.
Further, an ammonia gas generator 6 is arranged, and comprises an ammonia gas generator inner wall 6-1, a first effect-lifting ring 6-2, a first flow-disturbing cone 6-3, a second effect-lifting ring 6-4, a third effect-lifting ring 6-5 and a second flow-disturbing cone 6-6; the inner wall 6-1 of the ammonia generator is cylindrical; the section of the first effect-lifting ring 6-2 is an inclined sector surface and is connected with the inner wall 6-1 of the ammonia generator through a supporting structure; the sections of the second effect-lifting ring 6-4 and the third effect-lifting ring 6-5 are in the shape of oblique sectors and are respectively fixed on the inner wall 6-1 of the ammonia gas generator, and the first flow-disturbing cone 6-3 and the second flow-disturbing cone 6-6 are both conical inclined planes and are connected with the inner wall 6-1 of the ammonia gas generator through a supporting structure; the first effect-lifting ring 6-2, the first flow-disturbing cone 6-3, the second effect-lifting ring 6-4, the third effect-lifting ring 6-5 and the second flow-disturbing cone 6-6 are sequentially arranged along the axial direction of the ammonia gas generator 6.
The amount of flue gas in the bypass flue 14 is adjusted through a first fan 13 and an adjusting valve 12, so that the temperature of the flue gas at an inlet of the SCR reactor 3 is 320-450 ℃; the flue gas temperature at the outlet of the SCR reactor 3 and the inlets of the lithium bromide devices is basically 320-450 ℃, the flue gas temperature is 145 ℃ after passing through the lithium bromide devices, and then the flue gas is exhausted through various chimneys.
The catalyst 4 is a medium temperature catalyst, and the medium temperature range is 320-450 ℃.
Compared with the prior art, the utility model discloses following beneficial effect has.
The utility model provides a be used for many gas internal-combustion engine flue gas medium temperature type deNOx systems, this system adopt one set of exhaust-heat boiler and SCR reaction integrated equipment to carry out nitrogen oxide and administer after converging many gas internal-combustion engine flue gases, and this system efficiency is high, succinct, compact, saves a large amount of areas and space, has practiced thrift construction cost and operation cost, the utility model discloses still related to an ammonia generater and prepared the ammonia to through the ammonia conversion rate to the ammonia generater optimization design of structure improves urea.
Drawings
FIG. 1 is a schematic diagram of a medium temperature denitration system for flue gas of a plurality of gas internal combustion engines.
In the figure: 1. a gas boiler smoke outlet, 2, a waste heat boiler, 3, an SCR reactor, 4, a catalyst, 5, a first chimney, 6, an ammonia gas generator, 7, a urea solution tank, 8, a compressed air tank, 9, a urea solution pipe, 10, a compressed air pipe, 11, a spray gun, 12, a first regulating valve, 13, a first fan, 14, a bypass flue, 15, a flue, 16, a first gas internal combustion engine smoke outlet, 17, a second gas internal combustion engine smoke outlet, 18, an Mth gas internal combustion engine smoke outlet, 19, a first lithium bromide device, 20, a second lithium bromide device, 21, a third lithium bromide device, 22, an Nth lithium bromide device, 23, a second fan, 24, a third fan, 25, a fourth fan, 26, an Nth fan, 27, a second regulating valve, 28, a third regulating valve, 29, a fourth regulating valve, 30, an Nth regulating valve, 31. a second chimney, 32 a third chimney, and an lth chimney 33; m, N and L are positive integers, and the three positive integers may not be the same.
FIG. 2 is a schematic view of an ammonia gas generator.
In the figure: 6-1 parts of the inner wall of the ammonia gas generator, 6-2 parts of a first effect-improving ring, 6-3 parts of a first flow-disturbing cone, 6-4 parts of a second effect-improving ring, 6-5 parts of a third effect-improving ring, 6-6 parts of a second flow-disturbing cone.
Fig. 3 is a schematic structural diagram of a medium-temperature denitration system 2 for flue gas of a plurality of gas internal combustion engines.
In the figure: 34. the heat exchanger comprises a first heat exchanger, a second heat exchanger, a third heat exchanger and a 37 Nth heat exchanger.
Fig. 4 is a layout diagram of embodiment 3 of the present invention.
Fig. 5 is a layout diagram of embodiment 4 of the present invention.
Detailed Description
Example 1
The following description will be made by taking a flue gas denitration system of a 4.4MW gas internal combustion engine unit in a certain distributed energy station as an example in combination with the drawings.
In the SCR flue gas denitration system of a 4.4MW gas internal combustion engine unit of a certain distributed energy station, as shown in figures 1 and 2, the flue gas temperature at the smoke outlet 1 of the gas internal combustion engine is 430-550 ℃, the highest temperature can reach 600 ℃, the power generation output is 4.4MW, and the flue gas amount is dry 19888Nm when the load rate of the gas internal combustion engine is 100 percent3H, 5% O on a dry basis in the standard state2NO under the conditionsxAre all 500mg/Nm3(ii) a The temperature of the flue gas outlet of each lithium bromide device is 145 ℃; the suitable temperature range of the catalyst 4 is 320-450 ℃.
The temperature of the flue gas is reduced to 350 ℃ after the flue gas passes through the waste heat boiler 2, the temperature of the flue gas at the inlet of the SCR reactor 3 is basically 350 ℃, and the temperature is within the application temperature range of 320-450 ℃ of the medium-temperature catalyst; the amount of flue gas in the bypass flue 14 is adjusted through a first fan 13 and a first adjusting valve 12, so that the temperature of the flue gas at an inlet of the SCR reactor 3 is 350-400 ℃; the flue gas temperature at the outlet of the SCR reactor 3 and the inlet of the first lithium bromide 19 is basically 350-400 ℃; the smoke is reduced to 145 ℃ after passing through a first lithium bromide device 19; the flue gas passes through a second fan 23 and a second regulating valve 27, and is exhausted through a chimney 5 by a first lithium bromide device 19; the flue gas passes through the Nth fan 26 and the Nth regulating valve 30, and is exhausted through the Nth lithium bromide device 22 and the Lth chimney;
the urea solution with the concentration of 30-50% in the urea solution tank 7 enters the spray gun 11 through the urea solution pipe 9, the compressed air with the pressure of 0.3-0.8 kg in the compressed air tank 8 enters the spray gun 11 through the compressed air pipe 10, the spray gun 11 is vertically and axially inserted into the ammonia generator 6, the urea solution is atomized in the ammonia generator 6 under the action of the compressed air and the spray nozzle of the spray gun 11, as shown in fig. 2, the atomized urea micro-droplets and the flue gas can be fully mixed by the action of the three effect-lifting rings, the speed of the mixed flue gas is increased and the mixed flue gas is accelerated to rush to the two turbulence cones, the mixed flue gas can form backflow by the action of the two turbulence cones, the time for the urea micro-droplets to generate ammonia gas in the ammonia gas generator 6 is prolonged, the atomized urea micro-droplets are decomposed to generate ammonia gas at the flue gas temperature of 400 ℃ in the ammonia gas generator 6, the ammonia conversion rate of the urea is improved by the structural optimization design of the ammonia generator 6 as shown in figure 2.
The generated ammonia gas enters the SCR reactor 3 along with the flue gas, nitrogen oxide in the flue gas and the generated ammonia gas perform catalytic reaction on the surface of the catalyst 4 to generate nitrogen gas, and NO is at the outlet of the SCR reactor 3xIn the standard state, 5% O on a dry basis2At a conditional concentration of 30mg/Nm3。
Example 2
The following description will be made by taking a flue gas denitration system of a 4.4MW gas internal combustion engine unit in a certain distributed energy station as an example in combination with the drawings.
SCR flue gas denitration system of 4.4MW gas internal combustion engine unit of certain distributed energy station, as shown in figures 2 and 3, flue gas temperature at 1 position of smoke outlet of gas internal combustion engineThe temperature is 430-550 ℃, the highest temperature can reach 600 ℃, the power generation output is 4.4MW, and the flue gas amount is dry 19888Nm when the load factor of the gas internal combustion engine is 100 percent3H, 5% O on a dry basis in the standard state2NO under the conditionsxAre all 500mg/Nm3(ii) a The temperature of a flue gas outlet of each lithium bromide device is 145 ℃; the suitable temperature range of the catalyst 4 is 320-450 ℃; and heat exchangers are additionally arranged between each lithium bromide device and the chimney 5.
The temperature of the flue gas is reduced to 350 ℃ after the flue gas passes through the waste heat boiler 2, the temperature of the flue gas at the inlet of the SCR reactor 3 is basically 350 ℃, and the temperature is within the applicable temperature range of 320-450 ℃ of the medium-temperature catalyst; the amount of flue gas in the bypass flue 14 is adjusted through a first fan 13 and a first adjusting valve 12, so that the temperature of the flue gas at an inlet of the SCR reactor 3 is 350-400 ℃; the flue gas temperature at the outlet of the SCR reactor 3 and the inlet of the first lithium bromide 19 is basically 350-400 ℃; the smoke is reduced to 145 ℃ after passing through a first lithium bromide device 19; the smoke passes through a second fan 23, a second regulating valve 27 and a first lithium bromide device 19, the temperature of the smoke is reduced to 72 ℃ after passing through a heat exchanger 34, and then the smoke is exhausted through a chimney 5; the temperature of the flue gas is reduced to 72 ℃ through the Nth fan 26, the Nth regulating valve 30, the Nth lithium bromide equipment 22 and the Nth heat exchanger 37, and then the flue gas is exhausted through the L-th chimney;
the temperature of the flue gas is reduced to 145 ℃ after passing through each lithium bromide device, the temperature of the flue gas is reduced to 72 ℃ from 145 ℃ after passing through each heat exchanger, and then the flue gas is exhausted through each chimney.
The energy efficiency of the medium-temperature denitration system for the flue gas of the gas internal combustion engine is higher after the heat exchangers are additionally arranged between each lithium bromide device and each chimney.
The urea solution with the concentration of 30-50% in the urea solution tank 7 enters the spray gun 11 through the urea solution pipe 9, the compressed air with the pressure of 0.3-0.8 kg in the compressed air tank 8 enters the spray gun 11 through the compressed air pipe 10, the spray gun 11 is vertically and axially inserted into the ammonia generator 6, the urea solution is atomized in the ammonia generator 6 under the action of the compressed air and the spray nozzle of the spray gun 11, as shown in fig. 2, the atomized urea micro-droplets and the flue gas can be fully mixed by the action of the three effect-lifting rings, the speed of the mixed flue gas is increased and the mixed flue gas is accelerated to rush to the two turbulence cones, the mixed flue gas can form backflow by the action of the two turbulence cones, the time for the urea micro-droplets to generate ammonia gas in the ammonia gas generator 6 is prolonged, the atomized urea micro-droplets are decomposed to generate ammonia gas at the flue gas temperature of 400 ℃ in the ammonia gas generator 6, the ammonia conversion rate of the urea is improved by the structural optimization design of the ammonia generator 6 as shown in figure 2.
The generated ammonia gas enters the SCR reactor 3 along with the flue gas, nitrogen oxide in the flue gas and the generated ammonia gas perform catalytic reaction on the surface of the catalyst 4 to generate nitrogen gas, and NO is at the outlet of the SCR reactor 3xIn the standard state, 5% O on a dry basis2At a conditional concentration of 30mg/Nm3。
Example 3
The utility model discloses can also adopt like the arrangement mode of figure 4.
Example 4
The utility model discloses can also adopt like the arrangement mode of fig. 5.
Claims (6)
1. The utility model provides a medium temperature type deNOx systems for many gas internal-combustion engine flue gases which characterized in that: the device comprises a gas boiler smoke outlet (1), a waste heat boiler (2), an SCR reactor (3), a catalyst (4), a first chimney (5), an ammonia generator (6), a urea solution tank (7), a compressed air tank (8), a urea solution pipe (9), a compressed air pipe (10), a spray gun (11), a first regulating valve (12), a first fan (13), a bypass flue (14), a flue (15), a first gas internal combustion engine smoke outlet (16), a second gas internal combustion engine smoke outlet (17), an Mth gas internal combustion engine smoke outlet (18), a first lithium bromide device (19), a second lithium bromide device (20), a third lithium bromide device (21), an Nth lithium bromide device (22), a second fan (23), a third fan (24), a fourth fan (25), an Nth fan (26), a second regulating valve (27), A third regulating valve (28), a fourth regulating valve (29), an Nth regulating valve (30), a second chimney (31), a third chimney (32) and an Lth chimney (33); m, N and L are positive integers;
the smoke exhaust port (1) of the gas-fired boiler is connected with the waste heat boiler (2) through a flue (15); a smoke outlet (16) of the first gas internal combustion engine is connected with the waste heat boiler (2) through a flue (15); a smoke outlet (17) of the second gas internal combustion engine is connected with the waste heat boiler (2) through a flue (15); an exhaust port (18) of the Mth gas internal combustion engine is connected with the waste heat boiler (2) through a flue (15); the smoke exhaust port (1) of the gas boiler, the smoke exhaust port (16) of the first gas internal combustion engine, the smoke exhaust port (17) of the second gas internal combustion engine and the smoke exhaust port (18) of the Mth gas internal combustion engine are connected in parallel;
the waste heat boiler (2) is connected with the SCR reactor (3) through a flue (15); the catalyst (4) is arranged in the SCR reactor (3); the SCR reactor (3) is connected with a second fan (23) through a flue (15); the SCR reactor (3) is connected with a third fan (24) through a flue (15); the SCR reactor (3) is connected with a fourth fan (25) through a flue (15); the SCR reactor (3) is connected with an Nth fan (26) through a flue (15); the second fan (23), the third fan (24), the fourth fan (25) and the Nth fan (26) are connected in parallel;
the second fan (23) is connected with a second regulating valve (27) through a flue (15); the second regulating valve (27) is connected with the first lithium bromide equipment (19) through a flue (15); the first lithium bromide equipment (19) is connected with the first chimney (5) through a flue (15);
the third fan (24) is connected with a third regulating valve (28) through a flue (15); the third regulating valve (28) is connected with the second lithium bromide equipment (20) through a flue (15); the second lithium bromide equipment (20) is connected with a second chimney (31) through a flue (15);
the fourth fan (25) is connected with a fourth regulating valve (29) through a flue (15); the fourth regulating valve (29) is connected with the third lithium bromide equipment (21) through a flue (15); the third lithium bromide equipment (21) is connected with a third chimney (32) through a flue (15);
the Nth fan (26) is connected with the Nth regulating valve (30) through a flue (15); the Nth regulating valve (30) is connected with the Nth lithium bromide device (22) through a flue (15); the Nth lithium bromide device (22) is connected with the Lth chimney (33) through a flue (15);
one end of a bypass flue (14) is arranged on a flue (15) between a smoke exhaust port (1) of the gas boiler and the waste heat boiler (2), and the other end of the bypass flue (14) is arranged on the flue (15) in front of the SCR reactor (3);
the smoke exhaust port (1) of the gas-fired boiler is connected with a first fan (13) through a flue (15) and a bypass flue (14); the first fan (13) is connected with the ammonia generator (6) through a bypass flue (14) and a first regulating valve (12); the ammonia generator (6) is connected with the SCR reactor (3) through a bypass flue (14) and a flue (15); the urea solution tank (7) is connected with a spray gun (11) through a urea solution pipe (9); the compressed air tank (8) is connected with the spray gun (11) through a compressed air pipe (10); the spray gun (11) is inserted into the ammonia gas generator (6) along the vertical axial direction.
2. The medium-temperature denitration system for the flue gas of a plurality of gas internal combustion engines according to claim 1, characterized in that: the ammonia generator (6) comprises an ammonia generator inner wall (6-1), a first effect-lifting ring (6-2), a first flow-disturbing cone (6-3), a second effect-lifting ring (6-4), a third effect-lifting ring (6-5) and a second flow-disturbing cone (6-6); the inner wall (6-1) of the ammonia generator is cylindrical; the section of the first effect lifting ring (6-2) is an inclined sector surface and is connected with the inner wall (6-1) of the ammonia generator through a supporting structure; the sections of the second effect-lifting ring (6-4) and the third effect-lifting ring (6-5) are in the shape of oblique sectors and are respectively fixed on the inner wall (6-1) of the ammonia gas generator, and the first flow disturbing cone (6-3) and the second flow disturbing cone (6-6) are both conical inclined planes and are connected with the inner wall (6-1) of the ammonia gas generator through a supporting structure; the first effect-lifting ring (6-2), the first flow-disturbing cone (6-3), the second effect-lifting ring (6-4), the third effect-lifting ring (6-5) and the second flow-disturbing cone (6-6) are sequentially arranged along the axial direction of the ammonia gas generator (6).
3. The medium-temperature denitration system for the flue gas of a plurality of gas internal combustion engines according to claim 1, characterized in that: a part of smoke extracted from a smoke outlet (1) of the gas-fired boiler enters an ammonia gas generator (6) through a flue (15), a bypass flue (14) and a first fan (13) and a first regulating valve (12) and is used for preparing ammonia gas, and the amount of the part of smoke is calculated by the amount of ammonia gas to be prepared.
4. The medium-temperature denitration system for the flue gas of a plurality of gas internal combustion engines according to claim 1, characterized in that: a heat exchanger can be arranged between the lithium bromide equipment and the chimney; the temperature of the flue gas is reduced to 145 ℃ after passing through each lithium bromide device, the temperature of the flue gas is reduced to 72 ℃ from 145 ℃ after passing through each heat exchanger, and then the flue gas is exhausted through each chimney.
5. The medium-temperature denitration system for the flue gas of a plurality of gas internal combustion engines according to claim 1, characterized in that: the flue gas amount in the bypass flue (14) is adjusted through a first fan (13) and a first adjusting valve (12), so that the flue gas temperature at an inlet of the SCR reactor (3) is 320-450 ℃; the flue gas temperature at the outlet of the SCR reactor (3) and the inlet of the first lithium bromide equipment is basically 320-450 ℃, the temperature of the flue gas passing through the first lithium bromide equipment is 145 ℃, and then the flue gas is exhausted through a first chimney (5).
6. The medium-temperature denitration system for the flue gas of a plurality of gas internal combustion engines according to claim 1, characterized in that: the catalyst (4) is a medium-temperature catalyst, and the medium-temperature range of the medium-temperature catalyst is 320-450 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075416.8U CN209865776U (en) | 2019-01-16 | 2019-01-16 | Medium-temperature type denitration system for smoke of multiple gas internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075416.8U CN209865776U (en) | 2019-01-16 | 2019-01-16 | Medium-temperature type denitration system for smoke of multiple gas internal combustion engines |
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| Publication Number | Publication Date |
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| CN209865776U true CN209865776U (en) | 2019-12-31 |
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| CN201920075416.8U Active CN209865776U (en) | 2019-01-16 | 2019-01-16 | Medium-temperature type denitration system for smoke of multiple gas internal combustion engines |
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