CN220990337U - Marine low-speed machine test bed exhaust gas purification system - Google Patents
Marine low-speed machine test bed exhaust gas purification system Download PDFInfo
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- CN220990337U CN220990337U CN202322795809.5U CN202322795809U CN220990337U CN 220990337 U CN220990337 U CN 220990337U CN 202322795809 U CN202322795809 U CN 202322795809U CN 220990337 U CN220990337 U CN 220990337U
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- test bed
- reducing agent
- purification system
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- 238000000746 purification Methods 0.000 title claims abstract description 44
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 65
- 239000002912 waste gas Substances 0.000 claims abstract description 34
- 230000003197 catalytic effect Effects 0.000 claims abstract description 24
- 230000003647 oxidation Effects 0.000 claims abstract description 21
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000013618 particulate matter Substances 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 57
- 239000003054 catalyst Substances 0.000 abstract description 12
- 230000008929 regeneration Effects 0.000 abstract description 8
- 238000011069 regeneration method Methods 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 5
- 238000000197 pyrolysis Methods 0.000 abstract description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004202 carbamide Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a marine low-speed machine test bed waste gas purification system, which relates to the technical field of treatment of marine engine low-speed machine test bed waste gas, and specifically comprises a low-speed machine test bed, a waste gas purification system and a chimney; the waste gas purification system comprises a waste gas heating unit, a catalytic oxidation and particulate matter trapping unit, a reducing agent mixing unit, a denitration reaction unit, a fan unit, a reducing agent metering injection unit, a reducing agent supply unit and a bypass valve. According to the marine low-speed machine test bed waste gas purification system, the temperature of waste gas generated by the low-speed machine test bed can be raised to about 330 ℃ through the arrangement of the waste gas heating unit, so that the use or regeneration of a catalyst in the waste gas purification system is facilitated; the system is simple, the performance is reliable, an additional urea pyrolysis device is not required to be configured, the regeneration process of the particle trapping catalyst is not required to be frequently carried out, the overall cost of the system is reduced, the self characteristics can be utilized to fully distribute and use heat, and the purification performance of the system is fully exerted.
Description
Technical Field
The utility model relates to the technical field of treatment of exhaust gas of a low-speed machine test bed of a ship engine, in particular to an exhaust gas purification system of a low-speed machine test bed for a ship.
Background
At present, a selective catalytic reduction denitration (SCR) device is matched with a low-speed engine of a ship so as to meet the limit of IMO regulations on NOx emission, but the NOx emission still can be generated when the original engine performance test and bench submission are carried out.
Along with the enhancement of the supervision of the pollutant emission of the fixed source in each region, the waste gas generated by the low-speed engine test bed of the engine is required to be purified. According to the emission requirements of atmospheric pollutants in various areas, for the exhaust gas treatment of a low-speed machine test bed of a low-speed diesel engine of a ship, besides NOx, common pollutants such as CO, CH and particulate matter PM are included, and a non-diesel engine also needs to consider the treatment of the newly added pollutants such as methane, methanol, ammonia and the like, and part of area regulations also require that odor and NH3 be included in common detection items.
Catalytic oxidation, particulate trapping and regeneration, selective catalytic reduction, and the like are currently the dominant technologies in the field of exhaust gas treatment. Because the exhaust temperature of the ship low-speed engine is low (200-280 ℃), the low-speed engine has great challenges on the catalytic oxidation catalyst and the denitration catalyst to exert the catalytic performance, the particle trapping catalyst to exert the continuous regeneration performance and the reducing agent pyrolysis, and even loses the purification performance; based on the above, the application provides a marine low-speed machine test bed exhaust gas purification system.
Disclosure of utility model
The utility model provides a marine low-speed machine test bed waste gas purification system, which solves the problems that the exhaust temperature of the marine low-speed machine provided in the background technology is low (200-280 ℃), the catalytic oxidation catalyst, the denitration catalyst and the particle trapping catalyst are influenced, and the waste gas treatment efficiency and the treatment cost are influenced.
The utility model provides the following technical scheme: a marine low-speed machine test bed waste gas purification system is characterized in that a waste gas heating unit is arranged at the upstream of the system, the temperature of waste gas generated by the low-speed machine test bed is only required to be increased to about 330 ℃, and then the temperature of the waste gas is increased to 350 ℃ of the ignition temperature of particulate matters by utilizing catalytic oxidation heat release of harmful substances, so that the continuous regeneration of a particulate trap is realized. The temperature of the exhaust gas after the catalytic oxidation and particulate matter trapping unit exceeds 350 ℃, so that the reducing agent solution is fully evaporated and decomposed, and the temperature is the optimal temperature for the denitration catalyst to exert the catalytic performance. The system is simple, the performance is reliable, an additional urea pyrolysis device is not required to be configured, the regeneration process of the particle trapping catalyst is not required to be frequently carried out, and the overall cost of the system is reduced.
The marine low-speed machine test bed waste gas purification system comprises a low-speed machine test bed, a waste gas purification system and a chimney; the waste gas purification system comprises a waste gas heating unit, a catalytic oxidation and particulate matter capturing unit, a reducing agent mixing unit, a denitration reaction unit, a fan unit, a reducing agent metering injection unit, a reducing agent supply unit and a bypass valve, wherein the waste gas heating unit, the catalytic oxidation and particulate matter capturing unit, the reducing agent mixing unit, the denitration reaction unit and the fan unit are sequentially arranged at the downstream of a low-speed test bed, the waste gas heating unit can controllably increase the waste gas temperature, the reducing agent metering injection unit and the reducing agent supply unit supply reducing agent to the reducing agent mixing unit, the reducing agent metering injection unit can controllably inject the reducing agent into the reducing agent mixing unit, the reducing agent mixing unit uniformly mixes the reducing agent with waste gas, the fan unit controllably adjusts the waste gas pressure in the system, and the bypass valve can controllably bypass waste gas generated by the low-speed test bed.
Further, the waste gas heating unit, the catalytic oxidation and particulate matter capturing unit, the reducing agent mixing unit, the denitration reaction unit and the fan unit are sequentially arranged at the downstream of the low-speed machine test bed, and the downstream of the fan is connected with a chimney.
Further, the energy sources used by the exhaust heating unit, including but not limited to diesel, natural gas, and electricity, may increase and precisely control the exhaust temperature.
Further, the fan unit can stably adjust the exhaust pressure of the exhaust gas purification system.
Furthermore, the reducing agent supply unit, the reducing agent metering and injection unit and the reducing agent mixing unit are sequentially connected, the reducing agent metering and injection unit has two functions of accurately metering and stably injecting the reducing agent, and the reducing agent supply unit has two functions of storing and conveying the reducing agent.
Further, a bypass valve is arranged downstream of the low-speed machine test bed and the fan unit and is connected with a chimney.
Further, the exhaust gas purification system is applicable to engine types of low-speed test benches including, but not limited to, marine low-speed diesel engines, dual-fuel hosts, methanol engines, ammonia fuel hosts.
Further, the exhaust gas heating unit 10 increases the temperature of the exhaust gas to about 330 ℃, and the temperature of the exhaust gas after passing through the catalytic oxidation and particulate matter trapping unit 20 exceeds 350 ℃.
Compared with the prior art, the utility model has the following beneficial effects:
1. The marine low-speed machine test bed waste gas purification system can realize the purification treatment of low-temperature waste gas of the marine low-speed machine; the heat distribution and the use can be fully carried out by utilizing the characteristics of the heat distribution device, and the purification performance of the heat distribution device can be fully exerted.
2. The marine low-speed machine test bed waste gas purification system has the advantages of high purification efficiency, compact structure, easy operation, no influence on engine test, small occupied area and low comprehensive cost.
Drawings
FIG. 1 is a schematic diagram of a marine low-speed machine test bed exhaust gas purification system according to the present utility model.
In the figure: 10. an exhaust gas heating unit; 20. a catalytic oxidation and particulate matter trapping unit; 30. a reducing agent mixing unit; 40. a denitration reaction unit; 50. a blower unit; 60. a reductant metering injection unit; 70. a reducing agent supply unit; 80. a bypass valve; 100. a low-speed machine test bed; 200. an exhaust gas purification system; 300. and (5) a chimney.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a marine low-speed machine test bed waste gas purification system, which comprises a low-speed machine test bed 100, a waste gas purification system 200 and a chimney 300; the exhaust gas purification system 200 is arranged between the low-speed machine test bed 100 and the chimney 300, and the exhaust gas purification system 200 is used for purifying the exhaust gas generated by the low-speed machine test bed 100, and the purified exhaust gas is discharged from the chimney 300; and the exhaust gas purification system 200 includes the bypass valve 80, and by providing the bypass valve 80, the exhaust gas can be directly discharged from the stack 300 when the system is used for not purifying the exhaust gas or for other uses.
The exhaust gas purification system 200 further includes an exhaust gas heating unit 10, a catalytic oxidation and particulate matter trapping unit 20, a reducing agent mixing unit 30, a denitration reaction unit 40, a blower unit 50, a reducing agent metering injection unit 60, and a reducing agent supply unit 70. The exhaust gas heating unit 10, the catalytic oxidation and particulate matter trapping unit 20, the reducing agent mixing unit 30, the denitration reaction unit 40, and the blower unit 50 are arranged in this order downstream of the low-speed machine test bed 100.
The exhaust gas heating unit 10 is used to increase the temperature of the exhaust gas entering the exhaust gas purification system 200, and the energy source used by the exhaust gas heating unit 10, including but not limited to diesel, natural gas and electricity, can increase and precisely control the exhaust gas temperature.
The catalytic oxidation and particulate matter trapping unit 20 is disposed downstream of the exhaust gas heating unit 10, and removes harmful substances in the exhaust gas by catalytic oxidation, traps particulate matters in the exhaust gas, and reacts them.
The reducing agent supply unit 70, the reducing agent metering and injection unit 60 and the reducing agent mixing unit 30 are sequentially connected, the reducing agent metering and injection unit 60 has two functions of accurately metering and stably injecting the reducing agent, and the reducing agent supply unit 70 has two functions of storing and conveying the reducing agent; the reducing agent metering and injecting unit 60 and the reducing agent supplying unit 70 supply reducing agent to the reducing agent mixing unit 30, and the reducing agent metering and injecting unit 60 is integrally arranged on the reducing agent mixing unit 30, and the reducing agent metering and injecting unit 60 injects the reducing agent supplied by the reducing agent supplying unit 70 into the reducing agent mixing unit 30 along the air flow direction under the control of the controller; the reducing agent mixing unit 30 uniformly mixes the reducing agent injected from the reducing agent metering injection unit with the exhaust gas.
The denitration reaction unit 40 is disposed downstream of the reducing agent mixing unit 30, and reacts with the injected reducing agent to treat the exhaust gas; the blower unit 50 provides energy for the gas flow, overcomes the system pressure loss, and can stably adjust the exhaust pressure of the exhaust gas purification system 200.
The bypass valve 80 is disposed downstream of the low-speed test bed 100 and the fan unit 50, and both the downstream of the fan unit 50 and the bypass valve 80 are connected to the stack 300, and the bypass valve 80 is used to directly discharge the exhaust gas from the stack 300 when the exhaust gas is not subjected to the purification treatment or the like.
The exhaust gas purification system 200 described above is applicable to low speed machine test bed engine types including, but not limited to, marine low speed diesel engines, dual fuel host, methanol engines, ammonia fuel host.
To sum up: the working principle of the marine low-speed machine test bed waste gas purification system is as follows: the exhaust gas heating unit 10 is arranged at the upstream of the system, the temperature of the exhaust gas generated by the low-speed machine test bed is only required to be increased to about 330 ℃, and then the catalytic oxidation heat release of harmful substances is utilized to increase the temperature of the exhaust gas to the ignition temperature of the particulate matters to 350 ℃, so that the continuous regeneration of the particulate trap is realized. The temperature of the exhaust gas after passing through the catalytic oxidation and particulate matter trapping unit 20 exceeds 350 ℃, so that the reducing agent solution is fully evaporated and decomposed, and the temperature is the optimal temperature for the denitration catalyst to exert the catalytic performance. The system is simple, the performance is reliable, an additional urea pyrolysis device is not required to be configured, the regeneration process of the particle trapping catalyst is not required to be frequently carried out, and the overall cost of the system is reduced.
Standard parts used in the present utility model can be purchased from the market, the special-shaped parts can be customized according to the descriptions of the specification and the drawings, the specific connection modes of the parts are conventional means such as bolts, rivets, welding and the like which are mature in the prior art, and the machines, the parts and the equipment are conventional models in the prior art, so that details which are not described in detail in the specification belong to the prior art which is well known to the person skilled in the art, and although the embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a marine low-speed machine test bed exhaust gas purification system, includes low-speed machine test bed (100) and exhaust gas purification system (200), its characterized in that: the exhaust gas purification system (200) comprises an exhaust gas heating unit (10), a catalytic oxidation and particulate matter trapping unit (20), a reducing agent mixing unit (30), a denitration reaction unit (40), a fan unit (50), a reducing agent metering injection unit (60), a reducing agent supply unit (70) and a bypass valve (80);
The exhaust gas heating unit (10), the catalytic oxidation and particulate matter capturing unit (20), the reducing agent mixing unit (30), the denitration reaction unit (40) and the fan unit (50) are sequentially arranged at the downstream of the low-speed machine test bed (100), and the catalytic oxidation and particulate matter capturing unit (20) is positioned at the downstream of the exhaust gas heating unit (10); the reducing agent supply unit (70), the reducing agent metering injection unit (60) and the reducing agent mixing unit (30) are sequentially connected; the bypass valve (80) is arranged downstream of the low-speed test bed (100) and the fan unit (50), and the bypass valve (80) is connected with both the low-speed test bed (100) and the fan unit (50).
2. The marine low-speed machine test bed exhaust gas purification system according to claim 1, wherein: the marine low-speed machine test bed waste gas purification system further comprises a chimney (300), the downstream of the fan unit (50) is connected with the chimney (300), and the bypass valve (80) is connected with the chimney (300).
3. The marine low-speed machine test bed exhaust gas purification system according to claim 1, wherein: the reducing agent metering injection unit (60) is integrally arranged on the reducing agent mixing unit (30).
4. The marine low-speed machine test bed exhaust gas purification system according to claim 1, wherein: the exhaust gas heating unit (10) increases the temperature of the exhaust gas to about 330 ℃.
5. The marine low-speed machine test bed exhaust gas purification system according to claim 1, wherein: the temperature of the exhaust gas after passing through the catalytic oxidation and particulate matter trapping unit (20) exceeds 350 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322795809.5U CN220990337U (en) | 2023-10-18 | 2023-10-18 | Marine low-speed machine test bed exhaust gas purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322795809.5U CN220990337U (en) | 2023-10-18 | 2023-10-18 | Marine low-speed machine test bed exhaust gas purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220990337U true CN220990337U (en) | 2024-05-24 |
Family
ID=91092995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322795809.5U Active CN220990337U (en) | 2023-10-18 | 2023-10-18 | Marine low-speed machine test bed exhaust gas purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220990337U (en) |
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2023
- 2023-10-18 CN CN202322795809.5U patent/CN220990337U/en active Active
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