CN113417717A - Tail gas purification integrated device for heavy diesel engine test station - Google Patents
Tail gas purification integrated device for heavy diesel engine test station Download PDFInfo
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- CN113417717A CN113417717A CN202110807587.7A CN202110807587A CN113417717A CN 113417717 A CN113417717 A CN 113417717A CN 202110807587 A CN202110807587 A CN 202110807587A CN 113417717 A CN113417717 A CN 113417717A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention belongs to the technical field of engine tail gas treatment, and particularly relates to tail gas purification of a diesel engine with a fixed source, in particular to a tail gas purification integrated device for a heavy diesel engine test station, which comprises a shell, wherein one end of the shell is provided with a device inlet, the other end of the shell is provided with a device outlet, the space in the shell is sequentially divided into a settling chamber, a dust collecting chamber and a denitration chamber according to the flow direction of tail gas, an oil-gas separator is arranged in the settling chamber, a preposed airtight valve of the dust collecting chamber is arranged at the inlet of the dust collecting chamber, a DPF filtering unit is arranged at the outlet of the dust collecting chamber, an outlet pneumatic airtight valve is arranged at the outlet of the DPF filtering unit, an ammonia spraying grid and an SCR denitration unit are arranged in the denitration chamber, a nozzle is arranged on the ammonia spraying grid, and is connected with an external urea solution metering pump. The invention can efficiently remove main pollutants such as oil, PM, NOx and the like in the tail gas and is suitable for the requirement of purifying the tail gas with large air volume.
Description
Technical Field
The invention belongs to the technical field of engine tail gas treatment, particularly relates to tail gas purification of a diesel engine with a fixed source, and particularly relates to a tail gas purification integrated device for a heavy diesel engine test station.
Background
The diesel engine has strong dynamic property, good adaptability and reliable work, and is widely applied to various non-road vehicles and medium and heavy-duty automobiles. The emission of diesel engines is characterized by low CO and HC emissions and high Particulate Matter (PM) and NOx emissions, so the key to the purification of diesel exhaust is the efficient purification of Particulate Matter (PM) and NOx. In addition, the heavy diesel engine has the characteristics of large volume, high power and low combustion efficiency, and the tail gas contains a large amount of unburned oil in the starting stage of the engine. An engine test station is established in large diesel engine research or manufacturing enterprises, a plurality of diesel engines can be simultaneously subjected to performance tests, the tail gas discharge capacity of the test station is large and can reach thousands of cubic meters per hour, all tail gas needs to be collected and then concentrated and purified, and finally the tail gas reaches the standard and is discharged.
The existing diesel engine tail gas purification technology mainly comprises: oxidation catalytic conversion technology (DOC), particulate trap technology (DPF), and selective catalytic reduction technology (SCR). The DOC technology is to perform oxidation reaction through a catalyst, and can simultaneously reduce CO, HC, and soluble organic components (SOF) in particulate matter in exhaust gas. The main defects of the DOC technology at present comprise easy poisoning of the catalyst, easy high-temperature aging and low purification efficiency. The DPF technology utilizes a wall-flow ceramic filter element, two ends of adjacent honeycomb pore channels are alternatively plugged, airflow is forced to pass through a porous wall surface, particulate matters are trapped in the pore of the wall surface and on the wall surface of an inlet, and the particulate matter purification efficiency is high. The main defects of the DPF technology at present are that a ceramic filter element is easy to block particulate matters, the resistance rises quickly, and even the normal use of an engine is influenced. The SCR technique is through ureaAn injection system for injecting 32.5% urea water solution into the exhaust gas, the urea being pyrolyzed at high temperature to form NH3Reacts with NOx in the tail gas to reduce the NOx into N2And H2And O, thereby achieving the purpose of reducing NOx.
At present, the tail gas purification device of the diesel engine mostly adopts the combined process of the purification technologies, such as DOC + DPF, DOC + DPF + SCR and the like, and is mainly applied to various non-road vehicles and medium and heavy-duty automobiles. But the application of the tail gas centralized purification device for the large diesel engine test station is not reported.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fixed source diesel engine tail gas purification device, which is particularly suitable for the concentrated purification of tail gas of a heavy diesel engine test station, can efficiently remove main pollutants such as oil content, PM (particulate matter), NOx and the like in the tail gas, and meets the requirement of large-air-volume tail gas purification; the device adopts the integrated structure design, has the characteristics of continuous operation, small occupied area, less investment, low operation cost, convenient installation and transportation and the like, meets the long-acting stable operation characteristics of the user on the tail gas purification of the diesel engine, and has strong practicability and convenient popularization and application.
The invention is realized by adopting the following technical scheme: the utility model provides a heavy diesel engine test station tail gas purification integrated device, which comprises a housin, the one end of casing sets up the device import, the other end of casing sets up the device export, the casing inner space divide into the deposit room in proper order according to tail gas flow direction, dust collecting chamber and denitration chamber, be provided with oil and gas separator in the deposit room, the dust collecting chamber entrance is provided with the leading airtight valve of dust collecting chamber, the dust collecting chamber export is provided with DPF filter unit, DPF filter unit export is provided with the pneumatic airtight valve of export, be provided with ammonia injection grid and SCR denitration unit in the denitration chamber, be provided with the nozzle on the ammonia injection grid, outside urea solution measuring pump is connected to the nozzle.
The tail gas of the diesel engine test station is collected by a pipeline and then is sent into the device inlet of the purification device, and the tail gas enters the settling chamber through the device inlet. An oil-gas separator is arranged in the settling chamber, so that oil in the tail gas can be efficiently removed, and the large-particle PM can be settled and purified in the settling chamber. Then the tail gas is collected by a dust collecting chamberThe air-tight valve and the dust collecting chamber are arranged in front and enter the DPF filtering unit. PM in the tail gas is removed through wall-flow filtration of the DPF ceramic filter element. And then, the tail gas flows out of the pneumatic closed valve at the outlet of the DPF filtering unit, flows through the ammonia spraying grid and reaches the SCR denitration unit. And spraying a proper amount of urea solution into the tail gas by an ammonia spraying grid. Pyrolysis of urea at high temperature to form NH3And evenly mixed with the tail gas, and NH is carried out under the action of a catalyst of an SCR denitration unit3Reacts with NOx in the tail gas to reduce the NOx into N2And H2And O, removing NOx in the tail gas, and finally, conveying the purified tail gas to a chimney to reach the standard for emission after flowing through an outlet of the device.
The tail gas purification integrated device for the heavy diesel engine test station is characterized in that a front diffuser is arranged on the shell at the rear position of an inlet of the device, and a rear diffuser is arranged at the position in front of an outlet of the device.
The outlet of the DPF filter unit is further connected with a compressed air pipeline, a compressed air blowback airtight valve is arranged on the compressed air pipeline, the compressed air pipeline is connected with an external air pump, pressure sensors are arranged at the inlet and the outlet of the DPF filter unit, and data of the pressure sensors are transmitted to an external automatic control system, so that an online blowback regeneration structure of the DPF filter unit is formed. Pressure sensors are arranged in the front and the back of the DPF filtering unit of the integrated device, and the pressure drop condition of tail gas flowing through the DPF filtering unit is monitored in real time. When the differential pressure reaches a set value, the blockage of the DPF filter element is indicated, and the automatic control system starts the on-line regeneration of the DPF filter unit. The on-line regeneration process is completed by the mutual matching of a preposed airtight valve of the dust collecting chamber, an outlet pneumatic airtight valve and a compressed air back-blowing airtight valve. When the on-line regeneration is started, the pneumatic closed valve at the outlet is closed, the preposed airtight valve of the dust collecting chamber is closed, the compressed air blowback airtight valve is opened, and the DPF filter element is reversely blowback regenerated. Compressed air flows in from the tail end and flows out from the front end of the DPF filter element to take out PM blocked in the filter element, so that the aim of back flushing regeneration of the DPF filter unit is fulfilled. PM reversely blown out from the DPF filter element is collected at the bottom of the dust collection chamber and is cleaned regularly.
The utility model provides an foretell heavy diesel engine test station tail gas purification integrated device, the dust collecting chamber divide into a plurality of collection chamber unit in vertical direction, the entry of every collection chamber unit all is provided with the leading airtight valve of dust collecting chamber, the export all is provided with DPF filter unit, a filter unit is constituteed to collection chamber unit and DPF filter unit, set up a plurality of filter unit in the casing, when first filter unit of group is on-line regeneration, other filter unit of group can normally work, first group is on-line regeneration back, filter unit on-line regeneration is organized to the second again, accomplish all filter unit's on-line regeneration in proper order.
The tail gas purification integrated device for the heavy diesel engine test station is characterized in that an inlet of the device and an outlet of the device in the shell are respectively provided with a tail gas flow sensor, a temperature sensor, a pressure sensor and a NOx content measuring sensor, an ammonia injection grid is controlled by an automatic control system, the external automatic control system calculates the amount of urea consumed for denitration by monitoring parameters of tail gas flow, temperature, pressure, NOx content and oxygen content in real time, and controls a urea solution metering pump to spray a proper amount of urea solution into tail gas.
The invention has the following advantages:
1. the invention provides an integrated device suitable for tail gas centralized purification of a heavy diesel engine test station, which can meet the requirement of tail gas purification with large air volume. The integrated device integrates the technologies of sedimentation, blade separation, DPF particle collection, SCR denitration and the like, and can efficiently remove main pollutants such as oil content, PM, NOx and the like in the tail gas.
2. The device combines deposit room and blade separator organic, and oil content in the high-efficient tail gas of purifying has improved the security of device, ensures rear end DPF filter unit's long-term steady operation simultaneously.
3. The device has designed the online blowback regeneration structure of DPF filter element, and blowback regeneration efficiency is high, can effectively solve the shortcoming that DPF filter core carbon loading capacity is low, the dimension guarantor cycle is short, has ensured the long-term steady operation of equipment.
4. The device adopts the integrated structure design, compact structure, takes up an area of for a short time, and the small investment, the running cost is low, and installation and transportation are convenient.
5. This integrated device can carry out the modularization adjustment to DPF filter unit, SCR denitration unit according to specific conditions such as diesel engine test station tail gas tolerance, pollutant content, has reduced product design processing cycle, can the user demand of the different test stations of quick response scale.
Drawings
Fig. 1 is a view showing an overall structure of the integrated apparatus.
In the figure: 1-device inlet, 2-front diffuser, 3-settling chamber, 4-separator, 5-dust chamber front airtight valve, 6-dust chamber, 7-DPF filtering unit, 8-DPF unit outlet pneumatic airtight valve, 9-compressed air back blowing airtight valve, 10-compressed air pipeline, 11-ammonia spraying grid, 12-SCR denitration unit, 13-rear diffuser and 14-device outlet.
Detailed Description
According to the characteristics of large exhaust emission of a heavy diesel engine test station, high content of Particulate Matters (PM) and NOx in the exhaust, insufficient combustion oil content and the like, a set of special integrated exhaust purification device is designed. As shown in fig. 1, the integrated device comprises a device inlet 1, a front diffuser 2, a settling chamber 3, a separator 4, a dust chamber front airtight valve 5, a dust chamber 6, a DPF filtering unit 7, an outlet pneumatic airtight valve 8, a compressed air blowback airtight valve 9, a compressed air pipeline 10, an ammonia injection grid 11, an SCR denitration unit 12, a rear diffuser 13 and a device outlet 14.
Tail gas of the diesel engine test station is collected by a pipeline and then is sent into a device inlet 1 of the purifying device, and the tail gas uniformly enters a settling chamber 3 through a front diffuser 2. Two layers of blade type oil-gas separators 4 are arranged in the settling chamber, so that oil in tail gas can be efficiently removed, and large-particle PM can be settled and purified in the settling chamber. Then, the exhaust gas enters the DPF filtering unit 7 through the pre-airtight valve 5 and the dust collecting chamber 6. Through wall-flow filtration of the DPF ceramic filter element, more than 99% of PM in the exhaust gas is removed. Then, the exhaust gas flows out of the DPF filtering unit outlet pneumatic sealed valve 8, flows through the ammonia injection grid 11, and reaches the SCR denitration unit 12. The ammonia injection grid is controlled by an automatic control system, the automatic control system calculates the urea consumption required by denitration by monitoring parameters such as tail gas flow, temperature, pressure, NOx content, oxygen content and the like in real time,and controlling a urea solution metering pump to spray a proper amount of urea solution into the tail gas. Pyrolysis of urea at high temperature to form NH3And evenly mixed with tail gas, and NH is carried out under the action of an SCR denitration catalyst3Reacts with NOx in the tail gas to reduce the NOx into N2And H2And O, removing NOx in the tail gas, and arranging two catalyst layers on the SCR denitration unit to ensure the denitration efficiency. Finally, the purified tail gas flows through a rear diffuser 13 and an outlet pipeline 14 and is sent to a chimney to reach the standard for emission.
Pressure sensors are arranged in front of and behind the DPF filtering unit 7 of the integrated device, and the pressure drop condition of tail gas flowing through the DPF filtering unit is monitored in real time. When the differential pressure reaches a set value, the blockage of the DPF filter element is indicated, and the automatic control system starts the on-line regeneration of the DPF filter unit. The on-line regeneration process is completed by the mutual matching of a preposed airtight valve of the dust collecting chamber, an outlet pneumatic airtight valve 8 and a compressed air back-blowing airtight valve 9. The integrated device DPF filter unit divide into 3 groups, and every group DPF filter unit sharing a dust collecting chamber, every dust collecting chamber set up the leading airtight valve of a dust collecting chamber, and every DPF filter unit afterbody is equipped with the pneumatic airtight valve of export and compressed air blowback airtight valve. After the on-line regeneration is started, the pneumatic closed valve at the outlet of the first group of DPF units is closed, the front airtight valve of the dust collecting chamber corresponding to the dust collecting chamber is closed, the compressed air blowback airtight valve of the first group of DPF units is opened, and the DPF filter elements are subjected to reverse blowback regeneration. Compressed air flows in from the tail end and flows out from the front end of the DPF filter element to take out PM blocked in the filter element, so that the aim of back flushing regeneration of the DPF filter unit is fulfilled. PM reversely blown out from the DPF filter element is collected at the bottom of the dust collection chamber and is cleaned regularly. After regeneration of one group of DPF filtering units is completed, the compressed air blowback airtight valve is closed, the preposed airtight valve of the dust collecting chamber and the pneumatic airtight valve at the outlet of the DPF unit are opened, the DPF filtering units are put into use again, and then online blowback regeneration of the next group of DPF filtering units is started.
The device will subside, the technique integration such as blade separation, DPF particle entrapment, SCR denitration is integrative, realizes that multiple pollutant of diesel engine tail gas purifies in coordination, and device compact structure takes up an area of for a short time, and the small investment, the running cost is low, and installation and transportation are convenient. Through adjusting the size of the settling chamber and the number of the blade separators, the DPF filtering units and the SCR denitration units, the device can be suitable for the tail gas purification requirements of diesel engine test stations of different scales. Through the design of the on-line regeneration structure of the DPF filtering unit, the device can continuously and stably operate, and the continuous production requirements of enterprises are met.
Claims (6)
1. The utility model provides a heavy diesel engine test station tail gas purification integrated device which characterized in that: the device comprises a housing, one end of the housing is provided with a device inlet (1), the other end of the housing is provided with a device outlet (14), the inner space of the housing is sequentially divided into a settling chamber (3) according to the flowing direction of tail gas, a dust collecting chamber (6) and a denitration chamber, an oil-gas separator (4) is arranged in the settling chamber (3), a front-mounted airtight valve (5) of the dust collecting chamber is arranged at the inlet of the dust collecting chamber (6), an outlet of the dust collecting chamber (6) is provided with a DPF filtering unit (7), an outlet pneumatic airtight valve (8) of the DPF filtering unit (7) is arranged at the outlet of the DPF filtering unit, an ammonia injection grid (11) and an SCR denitration unit (12) are arranged in the denitration chamber, a nozzle is arranged on the ammonia injection grid (11), and the nozzle is connected with an external urea solution metering pump.
2. The integrated tail gas purification device for the heavy-duty diesel engine test station according to claim 1, characterized in that: a front diffuser (2) is arranged on the housing at a position behind the device inlet (1), and a rear diffuser (13) is arranged at a position in front of the device outlet (14).
3. The integrated tail gas purification device for the heavy-duty diesel engine test station according to claim 1, characterized in that: the outlet of the DPF filtering unit (7) is further connected with a compressed air pipeline (10), a compressed air blowback airtight valve (9) is arranged on the compressed air pipeline (10), the compressed air pipeline (10) is connected with an external air pump, pressure sensors are further arranged at the inlet and the outlet of the DPF filtering unit (7), and data of the pressure sensors are transmitted to an external automatic control system.
4. The integrated tail gas purification device for the heavy-duty diesel engine test station according to claim 3, wherein: the dust collecting chamber (6) is vertically divided into a plurality of integrated chamber units, the inlet of each integrated chamber unit is provided with a front-mounted airtight valve (5) of the dust collecting chamber, and the outlet of each integrated chamber unit is provided with a DPF filtering unit (7).
5. The integrated tail gas purification device for the heavy-duty diesel engine test station according to claim 1, 2, 3 or 4, wherein: the device inlet (1) and the device outlet (14) in the shell are provided with an exhaust gas flow sensor, a temperature sensor, a pressure sensor and a NOx content measuring sensor, an ammonia spraying grid is controlled by an automatic control system, the external automatic control system calculates the amount of urea consumed for denitration by monitoring parameters of exhaust gas flow, temperature, pressure, NOx content and oxygen content in real time, and controls a urea solution metering pump to spray a proper amount of urea solution into the exhaust gas.
6. The integrated tail gas purification device for the heavy-duty diesel engine test station according to claim 1, 2, 3 or 4, wherein: two layers of oil-gas separators (4) are arranged in the settling chamber (3), and the oil-gas separators (4) are blade type oil-gas separators.
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| CN202110807587.7A CN113417717A (en) | 2021-07-16 | 2021-07-16 | Tail gas purification integrated device for heavy diesel engine test station |
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| CN202110807587.7A CN113417717A (en) | 2021-07-16 | 2021-07-16 | Tail gas purification integrated device for heavy diesel engine test station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704352A (en) * | 2022-03-24 | 2022-07-05 | 青州市春晖科技发展有限公司 | Diesel generator tail gas treatment device and treatment method thereof |
| WO2023154297A1 (en) * | 2022-02-11 | 2023-08-17 | Ekstam Spencer | Soot exhaust gas recirculation separator |
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Application publication date: 20210921 |