CN106401703A - Tail gas purification system and tail gas purification method for diesel generator set - Google Patents
Tail gas purification system and tail gas purification method for diesel generator set Download PDFInfo
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- CN106401703A CN106401703A CN201610321493.8A CN201610321493A CN106401703A CN 106401703 A CN106401703 A CN 106401703A CN 201610321493 A CN201610321493 A CN 201610321493A CN 106401703 A CN106401703 A CN 106401703A
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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
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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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—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 using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
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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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
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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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
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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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/04—Exhaust treating devices having provisions not otherwise provided for for regeneration or reactivation, e.g. of catalyst
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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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
Abstract
The invention discloses a tail gas purification system and a tail gas purification method for a diesel generator set. The tail gas purification system comprises a tail gas purifying device and an automatic control device; the tail gas purifying device comprises a gas inlet component, more than one purifying unit, a bypass unit and a gas outlet component; the gas inlet component comprises a front gas collector (2) and one or more gas inlets (1); the gas outlet component comprises a rear gas collector (11) and one or more gas outlets (12); the purifying unit comprises a heating component (5), a catalyzing component (7), a particle catcher (9) and a large corrugated pipe (10) which are sequentially arranged along the tail gas outflow direction; the bypass unit comprises a bypass pipe (8), a bypass valve (3) and a small corrugated pipe (4). The tail gas purification system disclosed by the invention is anti-blocking, explosion-proof, obvious in tail gas treatment effect and deodorization effect, capable of working continuously and long in service time.
Description
Technical field
The invention belongs to the tail gas clean-up field of diesel engine, especially tail gas from diesel electric generator purification techniques field.
Background technology
Diesel generating set initial start stage (about 3min), exhaust opening is emerged a large amount of black smokes, after diesel engine is stable, though black smoke is reduced, exists all the time, particularly in cold season, exhaust opening can produce a large amount of smog.A large amount of soot particulates, hydro carbons, carbon monoxide, carbon dioxide, oxynitrides, vapor, oxygen, nitrogen, sulfur dioxide etc. is contained in diesel generating set emission, main matter is soot particulate, its discharge capacity is about tens times of gasoline engine, untreated can cause Heavy environmental pollution.Existing diesel vent gas treatment generally adopts " continuously trapping decomposition technique (CRT) ", this technology is made up of one group of oxidation catalysis unit (DOC) and trap (DPF), trap the particulate matter (black smoke main component) in waste gas using DPF, so that DPF is regenerated under certain condition using DOC simultaneously, can achieve the continuous catalysis to pernicious gases such as exhaust particulate thing (PM), hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx), trapping and decompose.This method concrete principle is：When diesel generating set on-load running hours, exhaust temperature can reach more than 400 DEG C, the soot particulate (PM) being gathered in wall flow type ceramic filter element, the harmful substance such as CO, THC are burned under catalyst action and decompose, and reach the purpose of regeneration.
Above-mentioned method solves the problems, such as high pollution during diesel generating set continuous service, but in use when diesel generating set is in underload or intermittent duty, because soot particulate (PM), CO, THC etc. are continuously increased, DPF gas permeability is deteriorated, and diesel exhaust gas resistance can be continuously increased.Therefore there is problems with prior art：When diesel-driven generator idling, load low when or when just starting, because exhaust temperature is too low, DOC cannot normal work, easily cause DPF blocking；For solving this problem, someone's pre-buried heater strip in the core component cordierite honeycomb ceramic (filter core) of DPF, DOC cannot normal work when, initiative regeneration DPF, easily vigorous combustion (detonation) again in this mode, lead to DPF to lose efficacy, also result in cordierite honeycomb ceramic production cost and uprise and not easy care.
Content of the invention
For overcoming the deficiencies in the prior art, the present invention provides tail gas from diesel electric generator cleaning system, this system tail gas clean-up efficiency high, and avoids the risk that thermal explosion leads to DPF to lose efficacy with DPF blocking.
For achieving the above object, the technical solution used in the present invention is：
A kind of tail gas from diesel electric generator cleaning system, including exhaust gas cleaner, described exhaust gas cleaner includes air inlet assembly, more than one clean unit, bypass block and gas outlet assembly, described air inlet assembly includes front gas collector (2) and more than one air inlet (1), and described air inlet (1) is arranged on front gas collector (2)；Described gas outlet assembly includes rear gas collector (11) and more than one gas outlet (12), and described gas outlet (12) is arranged on rear gas collector (11)；Described clean unit includes heating assembly (5), catalytic module (7), grain catcher (9) and the big ripple pipe (10) setting gradually along tail gas stream outgoing direction, and described heating assembly (5) is connected with front gas collector (2), and described big ripple pipe (10) is connected with rear gas collector (11)；Described bypass block includes bypass pipe (8), by-passing valve (3) and small corrugated pipe (4), described bypass pipe (8) one end is connected with front gas collector (2) by by-passing valve (3), and the other end is connected with rear gas collector (11) by small corrugated pipe (4).
Further, also include automaton, described automaton includes monitoring sensing unit, control process unit and performance element, described monitoring sensing unit includes temperature sensor (51) and pressure sensor (52), described temperature sensor (51) and pressure sensor (52) are installed in heating assembly (5), in front gas collector (2) or rear gas collector (11), and described temperature sensor (51) is used for detecting the temperature of tail gas, and this temperature signal is sent to control transmitter, and described pressure sensor (52) is used for detecting the pressure of tail gas, and this pressure signal is sent to control transmitter；Described performance element includes electric heater (53) and bypass valve control (31), described electric heater (53) is installed in heating assembly (5), and described bypass valve control (31) is connected with by-passing valve (3)；Described control process unit includes controlling transmitter and PLC, control interface, input display end, the pressure signal that described control transmitter is used for the temperature signal detecting temperature sensor (51) and pressure sensor (52) detects sends PLC to；Described PLC receives the control parameter by inputting display end input, and the temperature signal controlling transmitter to send and pressure signal are compared with control parameter, to judge whether to start electric heater (53) heating and whether start bypass valve control (31) to open by-passing valve (3)；Described input display end is used for inputting control parameter, and described control parameter includes catalytic module (7) operating temperature and the first preset pressure and the second preset pressure, shows temperature and the pressure reduction of measurement simultaneously；Described control interface controls the startup of electric heater (53) to close and bypass the switch of valve control (31).
Preferably：Described grain catcher (9) is wall flow type ceramic filter element grain catcher (DPF).
Preferably：Described catalytic module (7) is the oxidation catalysis unit (DOC) of metal material or (DOC) of ceramic material；Described wall flow type ceramic filter element adopts carbofrax material, the especially patent of Patent No. CN200510010967.9《The microparticles collection device of a kind of ceramic catalyst carrier and this carrier composition and its their preparation method》The carbofrax material of the vitrified bond of listed method preparation is made.
Preferably：The exhaust temperature that described heating assembly (5) is flowed out is between 200-550 DEG C.The tail gas pressure that described heating assembly (5) is flowed out is between less than 8kPa.
Preferably：The first described preset pressure is set to：5kPa-15kPa；The second described preset pressure should be greater than the first preset pressure, and the second preset pressure is：8kPa-20kPa.
Preferably：Described temperature sensor is the above thermocouple of K indexing for precision.
Preferably：Between less than 50 μm, pore wall thickness is less than 0.4mm in the aperture of described grain catcher (9).
Preferably：The percent opening 40-60% of described grain catcher (9), hole count 10-47 every square centimeter.
Preferably：Catalyst can be coated in described wall flow type ceramic filter element.
A kind of tail gas from diesel electric generator purification method, input catalytic module (7) operating temperature and the first preset pressure and the second preset pressure in input display end；Diesel generating set is started, the tail gas of diesel generating set enters into cleaning system, temperature sensor (51) detection exhaust temperature now, pressure sensor (52) detection tail gas pressure now；The temperature signal that temperature sensor (51) detects by transmitter and the pressure signal that pressure sensor (52) detects is controlled to send PLC to；The operating temperature of the temperature signal controlling transmitter to send and input catalytic module (7) is compared by PLC, if exhaust temperature is less than the operating temperature of catalytic module (7), electric heater (53) auxiliary heating is started by control interface, until exhaust temperature rises to stops electric heater (53) during catalytic module (7) operating temperature.
The pressure signal controlling transmitter to send is compared by PLC with the first preset pressure, if pressure signal reaches the first preset pressure, starting electric heater (53) by control interface assists heating to carry out catalytic regeneration, make tail gas reduced pressure, when pressure signal is less than the first preset pressure, electric heater (53) heating is stopped by control interface；If pressure signal reaches the second preset pressure, bypass valve control (31) is started by control interface and opens by-passing valve (3), so that partial tail gas is entered in bypass pipe (8) from by-passing valve (3).
When diesel generating set just starts, when exhaust temperature is less than the operating temperature of input catalytic module (7), start electric heater auxiliary heating, temperature rises to and stops during the operating temperature of input catalytic module (7)；During diesel generating set normal work, exhaust temperature is higher, is able to maintain that the normal work of catalyst, and electric heater does not run.
When tail gas import and export pressure reduction reaches the first preset pressure, filter core blocking but serious when, automatically start electric heater and carry out catalytic regeneration, after pressure reduction falls after rise, stop electric heater；When tail gas import and export pressure reduction reaches the second preset pressure, filter core blocking is serious, automatically starts electric heater and carries out catalytic regeneration, open by-passing valve, it is to avoid diesel engine back pressure is excessive simultaneously, damage generator, and warning annunciator maintainer is overhauled.Pressure reduction closes by-passing valve after falling after rise, when pressure reduction falls back to below the first preset pressure, stops electric heater.
Tail gas from diesel electric generator cleaning system and purification method that the present invention provides, compared to existing technology, have the advantages that：
1. black smoke process and deodorizing effect substantially, light tight rate is close to zero.
2. when diesel generating set starts, cleaning system automatic and control, simple to operate.
3. the filter core that system uses is the patent of carbofrax material especially Patent No. CN200510010967.9《The microparticles collection device of a kind of ceramic catalyst carrier and this carrier composition and its their preparation method》The silicon carbide wall flow ceramic element of the vitrified bond of listed method preparation, long service life, operating cost is low, and heat resisting temperature is high, does not exist and leads to the situation of filter core inefficacy because of thermal explosion.
4. intelligent regenerative control system, effective control can regenerate, reduces energy ezpenditure.
5. it is designed with automatic by pass valve open function it is ensured that the normal work of diesel generating set in abnormal cases, it is to avoid because cleaning system blocking leads to the situation that diesel generating set cannot work.
6. modular construction, installs simple, is easy to safeguard.
Brief description
Fig. 1 is the first structural representation of the present invention；
Fig. 2 is tail gas control section of the present invention schematic diagram；
Fig. 3 is the second structural representation of the present invention；
Fig. 4 is the third structural representation of the present invention；
Fig. 5 is the 4th kind of structural representation of the present invention；
Wherein, 1 is air inlet, and 2 is front gas collector, 3 is by-passing valve, and 31 is bypass valve control, and 4 is small corrugated pipe, 5 is heating assembly, and 51 is temperature sensor, and 52 is pressure sensor, 53 is electric heater, and 7 is catalytic module (DOC), and 8 is bypass pipe, 9 is grain catcher (DPF), 10 is big ripple pipe, and 11 is rear gas collector, and 12 is gas outlet.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
Embodiment 1
Tail gas from diesel electric generator cleaning system, as shown in Figure 1, 2, including exhaust gas cleaner and automaton, described exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet assembly, described air inlet assembly includes front gas collector 2 and an air inlet 1, and described air inlet 1 is arranged on front gas collector 2；Described gas outlet assembly includes rear gas collector 11 and a gas outlet 12, and described gas outlet 12 is arranged on rear gas collector 11；Described clean unit includes heating assembly 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 setting gradually along tail gas stream outgoing direction, and described heating assembly 5 is connected with front gas collector 2, and described big ripple pipe 10 is connected with rear gas collector 11；Described bypass block includes bypass pipe 8, by-passing valve 3 and small corrugated pipe 4, and described bypass pipe 8 one end is connected with front gas collector 2 by by-passing valve 3, and the other end is connected with rear gas collector 11 by small corrugated pipe 4.
Described automaton includes monitoring sensing unit, control process unit and performance element, described monitoring sensing unit includes temperature sensor 51 and pressure sensor 52, described temperature sensor 51 and pressure sensor 52 are installed in heating assembly 5, and described temperature sensor 51 is used for detecting the temperature in the overheated assembly of tail gas stream 5, and this temperature signal is sent to control transmitter, and described pressure sensor 52 is used for detecting the pressure that tail gas flows through in heating assembly 5, and this pressure signal is sent to control transmitter；Described performance element includes electric heater 53 and bypass valve control 31, and described electric heater 53 is installed in heating assembly 5, and described bypass valve control 31 is connected with by-passing valve 3；Described control process unit includes controlling transmitter and PLC, control interface, input display end, described input display end is used for inputting control parameter, described control parameter includes catalytic module 7 operating temperature and the first preset pressure and the second preset pressure, shows temperature and the pressure reduction of measurement simultaneously；Described control interface controls the switch starting closing and bypass valve control 31 of electric heater 53.The described temperature signal controlling transmitter to be used for detecting K-type thermocouple 51 is converted to the temperature signal of numeric type, and send PLC to, the pressure signal being simultaneously used for detecting pressure sensor 52 is converted to the pressure signal of numeric type, and sends PLC to；Control parameter, the temperature signal receiving control transmitter transmission and pressure signal that described PLC reception is inputted by input, and temperature signal is compared with control parameter, if temperature signal is not in control parameter, starts electric heater 53 and heat；Pressure signal is compared with control parameter simultaneously, if pressure signal is not in control parameter, controls bypass valve control 31 to open by-passing valve 3.
Described grain catcher 9 is wall flow type ceramic filter element grain catcher DPF.
Described catalytic module 7 is the oxidation catalysis unit (DOC) of metal material or (DOC) of ceramic material；Described wall flow type ceramic filter element adopts the patent of carbofrax material especially Patent No. CN200510010967.9《The microparticles collection device of a kind of ceramic catalyst carrier and this carrier composition and its their preparation method》The carbofrax material of the vitrified bond of listed method preparation is made.
The exhaust temperature that described heating assembly 5 flows out is between 200-550 DEG C.The tail gas pressure that described heating assembly 5 flows out is between less than 8kPa.
The first described preset pressure is set to：5kPa-15kPa；The second described preset pressure should be greater than the first preset pressure, and the second preset pressure is：8kPa-20kPa.
Described temperature sensor is the above thermocouple of K indexing for precision.
Between less than 50 μm, pore wall thickness is less than 0.4mm in the aperture of described grain catcher 9.
The percent opening 40-60% of described grain catcher 9, hole count 10-47 every square centimeter.
Catalyst can be coated in described wall flow type ceramic filter element.
A kind of tail gas from diesel electric generator purification method, input catalytic module 7 operating temperature and the first preset pressure and the second preset pressure in input display end；Diesel generating set is started, the tail gas of diesel generating set enters into cleaning system, and temperature sensor 51 detects exhaust temperature now, and pressure sensor 52 detects tail gas pressure now；The temperature signal that temperature sensor 51 detects by transmitter and the pressure signal that pressure sensor 52 detects is controlled to send PLC to；The operating temperature of the temperature signal controlling transmitter to send and input catalytic module 7 is compared by PLC, if exhaust temperature is less than the operating temperature of catalytic module 7, electric heater 53 auxiliary heating is started by control interface, until exhaust temperature rises to stopping electric heater 53 during catalytic module 7 operating temperature.
The pressure signal controlling transmitter to send is compared by PLC with the first preset pressure, if pressure signal reaches the first preset pressure, starting electric heater 53 by control interface assists heating to carry out catalytic regeneration, make tail gas reduced pressure, when pressure signal is less than the first preset pressure, electric heater 53 is stopped by control interface and heats；If pressure signal reaches the second preset pressure, bypass valve control 31 is started by control interface and opens by-passing valve 3, so that partial tail gas is entered in bypass pipe 8 from by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is less than the operating temperature of input catalytic module 7, start electric heater auxiliary heating, temperature stops when rising to the operating temperature of input catalytic module 7；During diesel generating set normal work, exhaust temperature is higher, is able to maintain that the normal work of catalyst, and electric heater does not run.
Preset pressure one is set to 5kPa, and preset pressure two is set to 8kPa.When tail gas import and export pressure reduction reaches 5kPa, filter core blocking but serious when, automatically start electric heater and carry out catalytic regeneration, when pressure reduction falls back to below 5kPa, stop electric heater；Tail gas import and export pressure reduction reaches preset pressure：When tail gas import and export pressure reduction reaches 8kPa, when filter core blocking is serious, automatically start electric heater and carry out catalytic regeneration, open by-passing valve, it is to avoid diesel engine back pressure is excessive simultaneously, damage generator, when pressure reduction falls back to below 8kPa, close by-passing valve, when pressure reduction falls back to below 5kPa, stop electric heater.
This device is used for 200kw generating set, and black smoke clearance reaches 95%；HC clearance reaches 88%, CO clearance and reaches 89%.
Embodiment 2
Tail gas from diesel electric generator cleaning system, as shown in Fig. 3,2, including exhaust gas cleaner and automaton, described exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet assembly, and described air inlet assembly includes front gas collector 2 and two air inlets 1；Described rear gas port assembly includes rear gas collector 11 and two gas outlets 12；Described air inlet 1 is arranged on front gas collector 2；Described gas outlet 12 is arranged on rear gas collector 11, described clean unit includes heating assembly 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 setting gradually along tail gas stream outgoing direction, and described heating assembly 5 is connected with front gas collector 2, and described big ripple pipe 10 is connected with rear gas collector 11；Described bypass block includes bypass pipe 8, by-passing valve 3, and described bypass pipe 8 one end is connected with front gas collector 2 by by-passing valve 3, and the other end is directly connected with rear gas collector 11.
Described automaton includes monitoring sensing unit, control process unit and performance element, described monitoring sensing unit includes temperature sensor 51 and pressure sensor 52, described temperature sensor 51 and pressure sensor 52 are installed in front gas collector 2, and described temperature sensor 51 is used for detecting the temperature of non-purified tail gas, and this temperature signal is sent to control transmitter, and described pressure sensor 52 is used for detecting the pressure of non-purified tail gas, and this pressure signal is sent to control transmitter；Described performance element includes electric heater 53 and bypass valve control 31, and described electric heater 53 is installed in heating assembly 5, and described bypass valve control 31 is connected with by-passing valve 3；Described control process unit includes controlling transmitter and PLC, control interface, input display end, described input display end is used for inputting control parameter, described control parameter includes catalytic module 7 operating temperature and the first preset pressure and the second preset pressure, shows temperature and the pressure reduction of measurement simultaneously；Described control interface controls the switch starting closing and bypass valve control 31 of electric heater 53.The described temperature signal controlling transmitter to be used for detecting K-type thermocouple 51 is converted to the temperature signal of numeric type, and send PLC to, the pressure signal being simultaneously used for detecting pressure sensor 52 is converted to the pressure signal of numeric type, and sends PLC to；Control parameter, the temperature signal receiving control transmitter transmission and pressure signal that described PLC reception is inputted by input, and temperature signal is compared with control parameter, if temperature signal is not in control parameter, starts electric heater 53 and heat；Pressure signal is compared with control parameter simultaneously, if pressure signal is not in control parameter, controls bypass valve control 31 to open by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is less than the operating temperature of DOC, start electric heater auxiliary heating, temperature rises to and stops during DOC operating temperature；During diesel generating set normal work, exhaust temperature is higher, is able to maintain that the normal work of catalyst, and electric heater does not run.
Preset pressure one is set to 7kPa, and preset pressure two is set to 12kPa.When tail gas import and export pressure reduction reaches 7kPa, filter core blocking but serious when, automatically start electric heater and carry out catalytic regeneration, when pressure reduction falls back to below 7kPa, stop electric heater；Tail gas import and export pressure reduction reaches preset pressure：12kPa, when filter core blocking is serious, automatically starts electric heater and carries out catalytic regeneration, open by-passing valve simultaneously, avoid diesel engine back pressure excessive, damage generator, when pressure reduction falls back to below 12kPa, close by-passing valve, when pressure reduction falls back to below 7kPa, stop electric heater.
This device is used for 350kw generating set, and black smoke clearance reaches 93%；HC clearance reaches 90%, CO clearance and reaches 87%.
Embodiment 3
Tail gas from diesel electric generator cleaning system, as shown in Fig. 4,2, including exhaust gas cleaner and automaton, described exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet assembly, and described air inlet assembly includes front gas collector 2 and two air inlets 1；Described rear gas port assembly includes rear gas collector 11 and a gas outlet 12；Described air inlet 1 is arranged on front gas collector 2；Described gas outlet 12 is arranged on rear gas collector 11, described clean unit includes heating assembly 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 setting gradually along tail gas stream outgoing direction, and described heating assembly 5 is connected with front gas collector 2, and described big ripple pipe 10 is connected with rear gas collector 11；Described bypass block includes bypass pipe 8, by-passing valve 3 and small corrugated pipe 4, and described bypass pipe 8 one end is connected with front gas collector 2 by by-passing valve 3, and the other end is connected with rear gas collector 11 by small corrugated pipe 4.
Described automaton includes monitoring sensing unit, control process unit and performance element, described monitoring sensing unit includes temperature sensor 51 and pressure sensor 52, described temperature sensor 51 and pressure sensor 52 are installed in front gas collector 2 and rear gas collector 11, and described temperature sensor 51 is used for detecting the temperature of tail gas, and this temperature signal is sent to control transmitter, and described pressure sensor 52 is used for detecting the pressure of tail gas, and this pressure signal is sent to control transmitter；Described performance element includes electric heater 53 and bypass valve control 31, and described electric heater 53 is installed in heating assembly 5, and described bypass valve control 31 is connected with by-passing valve 3；Described control process unit includes controlling transmitter and PLC, control interface, input display end, described input display end is used for inputting control parameter, described control parameter includes catalytic module 7 operating temperature and the first preset pressure and the second preset pressure, shows temperature and the pressure reduction of measurement simultaneously；Described control interface controls the switch starting closing and bypass valve control 31 of electric heater 53.The described temperature signal controlling transmitter to be used for detecting K-type thermocouple 51 is converted to the temperature signal of numeric type, and send PLC to, the pressure signal being simultaneously used for detecting pressure sensor 52 is converted to the pressure signal of numeric type, and sends PLC to；Control parameter, the temperature signal receiving control transmitter transmission and pressure signal that described PLC reception is inputted by input, and temperature signal is compared with control parameter, if temperature signal is not in control parameter, starts electric heater 53 and heat；Pressure signal is compared with control parameter simultaneously, if pressure signal is not in control parameter, controls bypass valve control 31 to open by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is less than the operating temperature of DOC, start electric heater auxiliary heating, temperature rises to and stops during DOC operating temperature；During diesel generating set normal work, exhaust temperature is higher, is able to maintain that the normal work of catalyst, and electric heater does not run.
Preset pressure one is set to 15kPa, and preset pressure two is set to 20kPa.When tail gas import and export pressure reduction reaches 15kPa, filter core blocking but serious when, automatically start electric heater and carry out catalytic regeneration, when pressure reduction falls back to below 15kPa, stop electric heater；Tail gas import and export pressure reduction reaches preset pressure：When tail gas import and export pressure reduction reaches 20kPa, filter core blocking is serious, automatically start electric heater and carry out catalytic regeneration, open by-passing valve, it is to avoid diesel engine back pressure is excessive simultaneously, damage generator, when pressure reduction falls back to below 20kPa, close by-passing valve, when pressure reduction falls back to below 15kPa, stop electric heater.
This device is used for 600kw generating set, and black smoke clearance reaches 93%；HC clearance reaches 88%, CO clearance and reaches 87%.
Embodiment 4
Tail gas from diesel electric generator cleaning system, as shown in Fig. 5,2, including exhaust gas cleaner and automaton, described exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet assembly, and described air inlet assembly includes front gas collector 2 and two air inlets 1；Described rear gas port assembly includes rear gas collector 11 and three gas outlets 12；Described air inlet 1 is arranged on front gas collector 2；Described gas outlet 12 is arranged on rear gas collector 11, described clean unit includes heating assembly 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 setting gradually along tail gas stream outgoing direction, and described heating assembly 5 is connected with front gas collector 2, and described big ripple pipe 10 is connected with rear gas collector 11；Described bypass block includes bypass pipe 8, by-passing valve 3 and small corrugated pipe 4, and described bypass pipe 8 one end is connected with front gas collector 2 by by-passing valve 3, and the other end is connected with rear gas collector 11 by small corrugated pipe 4.
As shown in Figure 2, described automaton includes monitoring sensing unit, control process unit and performance element, described monitoring sensing unit includes temperature sensor 51 and pressure sensor 52, described temperature sensor 51 and pressure sensor 52 are installed in front gas collector 2 and heating assembly 5, and described temperature sensor 51 is used for detecting the temperature of non-purified tail gas, and this temperature signal is sent to control transmitter, and described pressure sensor 52 is used for detecting the pressure of non-purified tail gas, and this pressure signal is sent to control transmitter；Described performance element includes electric heater 53 and bypass valve control 31, and described electric heater 53 is installed in heating assembly 5, and described bypass valve control 31 is connected with by-passing valve 3；Described control process unit includes controlling transmitter and PLC, control interface, input display end, described input display end is used for inputting control parameter, described control parameter includes catalytic module 7 operating temperature and the first preset pressure and the second preset pressure, shows temperature and the pressure reduction of measurement simultaneously；Described control interface controls the switch starting closing and bypass valve control 31 of electric heater 53.The described temperature signal controlling transmitter to be used for detecting K-type thermocouple 51 is converted to the temperature signal of numeric type, and send PLC to, the pressure signal being simultaneously used for detecting pressure sensor 52 is converted to the pressure signal of numeric type, and sends PLC to；Control parameter, the temperature signal receiving control transmitter transmission and pressure signal that described PLC reception is inputted by input, and temperature signal is compared with control parameter, if temperature signal is not in control parameter, starts electric heater 53 and heat；Pressure signal is compared with control parameter simultaneously, if pressure signal is not in control parameter, controls bypass valve control 31 to open by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is less than the operating temperature of DOC, start electric heater auxiliary heating, temperature rises to and stops during DOC operating temperature；During diesel generating set normal work, exhaust temperature is higher, is able to maintain that the normal work of catalyst, and electric heater does not run.
Preset pressure one is set to 9kPa, and preset pressure two is set to 16kPa.When tail gas import and export pressure reduction reaches 9kPa, filter core blocking but serious when, automatically start electric heater and carry out catalytic regeneration, when pressure reduction falls back to below 9kPa, stop electric heater；Tail gas import and export pressure reduction reaches preset pressure：16kPa, when filter core blocking is serious, automatically starts electric heater and carries out catalytic regeneration, open by-passing valve simultaneously, avoid diesel engine back pressure excessive, damage generator, when pressure reduction falls back to below 16kPa, close by-passing valve, when pressure reduction falls back to below 9kPa, stop electric heater.
This device is used for 1200kw generating set, and black smoke clearance reaches 94%；HC clearance reaches 90%, CO clearance and reaches 88%.
Claims (10)
1. a kind of tail gas from diesel electric generator cleaning system it is characterised in that：Including exhaust gas cleaner, described tail gas clean-up
Device includes air inlet assembly, more than one clean unit, bypass block and gas outlet assembly, described air inlet
Mouth assembly includes front gas collector (2) and more than one air inlet (1), and described air inlet (1) is arranged at front collection
On gas device (2)；Described gas outlet assembly includes rear gas collector (11) and more than one gas outlet (12), institute
State gas outlet (12) to be arranged on rear gas collector (11)；Described clean unit is included along tail gas stream outgoing direction successively
The heating assembly (5) of setting, catalytic module (7), grain catcher (9) and big ripple pipe (10), and institute
State heating assembly (5) to connect with front gas collector (2), and described big ripple pipe (10) and rear gas collector (11)
Connection；Described bypass block includes bypass pipe (8), by-passing valve (3) and small corrugated pipe (4), described bypass pipe (8)
One end is connected with front gas collector (2) by by-passing valve (3), and the other end passes through small corrugated pipe (4) and rear gas collector
(11) connect.
2. tail gas from diesel electric generator cleaning system according to claim 1 it is characterised in that：Also include automatically controlling
Device, described automaton includes monitoring sensing unit, control process unit and performance element, described prison
Survey sensing unit and include temperature sensor (51) and pressure sensor (52), described temperature sensor (51) and pressure
Force snesor (52) is installed in heating assembly (5), front gas collector (2) or rear gas collector (11) are interior,
And described temperature sensor (51) is used for detecting the temperature of tail gas, and this temperature signal is sent to control transmitter,
And described pressure sensor (52) is used for detecting the pressure of tail gas, and this pressure signal is sent to control transmitter；
Described performance element includes electric heater (53) and bypass valve control (31), and described electric heater (53) is installed
In heating assembly (5), and described bypass valve control (31) is connected with by-passing valve (3)；Described control
Processing unit includes controlling transmitter, PLC, control interface and input display end, described control pick-up
The pressure signal that device is used for the temperature signal detecting temperature sensor (51) and pressure sensor (52) detects passes
Give PLC；Described PLC receives the control parameter by inputting display end input, and will control
The temperature signal that transmitter sends and pressure signal are compared with control parameter, to judge whether to start electric heater
(53) heat and whether start bypass valve control (31) open by-passing valve (3)；Described input display end is used for
Input control parameter, described control parameter includes catalytic module (7) operating temperature and the first preset pressure and second pre-
If pressure reduction；Described control interface controls the startup of electric heater (53) to close and bypass valve control (31)
Switch.
3. tail gas from diesel electric generator cleaning system according to claim 1 it is characterised in that：Described grain catcher
(9) it is wall flow type ceramic filter element grain catcher.
4. tail gas from diesel electric generator cleaning system according to claim 1 it is characterised in that：Described catalytic module (7)
Oxidation catalysis unit for metal material or the oxidation catalysis unit of ceramic material；Described wall flow type ceramic filter element adopts
The carbofrax material of vitrified bond is made.
5. tail gas from diesel electric generator cleaning system according to claim 1 it is characterised in that：Described heating assembly (5)
The exhaust temperature flowing out is between 200-550 DEG C；The tail gas pressure that described heating assembly (5) is flowed out is less than 8kPa
Between.
6. tail gas from diesel electric generator cleaning system according to claim 2 it is characterised in that：Described first is preset
Pressure reduction is set to：5kPa-15kPa；The second described preset pressure should be greater than the first preset pressure, and second is default
Pressure reduction is：8kPa-20kPa.
7. tail gas from diesel electric generator cleaning system according to claim 1 it is characterised in that：Described TEMP
Device is the above thermocouple of K indexing for precision.
8. tail gas from diesel electric generator cleaning system according to claim 2 it is characterised in that：Described grain catcher
(9) between less than 50 μm, pore wall thickness is less than 0.4mm in aperture.
9. tail gas from diesel electric generator cleaning system according to claim 2 it is characterised in that：Described grain catcher
(9) percent opening 40-60%, hole count 10-47 every square centimeter；It is coated with catalysis in described wall flow type ceramic filter element
Agent.
10. a kind of purification method based on the arbitrary described tail gas from diesel electric generator cleaning system of claim 1-9, its feature
It is：
Input catalytic module (7) operating temperature and the first preset pressure and the second preset pressure in input display end；
Diesel generating set is started, the tail gas of diesel generating set enters into cleaning system, and temperature sensor (51) is examined
Survey exhaust temperature now, pressure sensor (52) detection tail gas pressure now；Transmitter is controlled to pass temperature
Temperature signal that sensor (51) detects and the pressure signal that pressure sensor (52) detects send PLC to；
The operating temperature of the temperature signal controlling transmitter to send and input catalytic module (7) is compared by PLC,
If exhaust temperature is less than the operating temperature of catalytic module (7), electric heater (53) is started by control interface
Auxiliary heating, until exhaust temperature rises to stops electric heater (53) during catalytic module (7) operating temperature；
The pressure signal controlling transmitter to send is compared by PLC with the first preset pressure, if pressure signal
Reach the first preset pressure, electric heater (53) started by control interface and assists heating to carry out catalytic regeneration,
Make tail gas reduced pressure, when pressure signal is less than the first preset pressure, electricity is stopped by control interface and adds
Hot device (53) heating；If pressure signal reaches the second preset pressure, by-passing valve control is started by control interface
Device (31) processed opens by-passing valve (3), so that partial tail gas is entered in bypass pipe (8) from by-passing valve (3).
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| CN108049941A (en) * | 2018-01-08 | 2018-05-18 | 陈爱国 | A kind of diesel engine exhaust gas treatment device and method |
| CN108412591A (en) * | 2018-02-01 | 2018-08-17 | 江铃汽车股份有限公司 | Automobile exhaust after-treatment system and automobile |
| CN109519258A (en) * | 2018-11-07 | 2019-03-26 | 浙江银轮机械股份有限公司 | A kind of SCR catalyst component of band list by-passing valve |
| CN110617123A (en) * | 2019-10-10 | 2019-12-27 | 徐州瑞田工程机械有限公司 | Diesel engine tail gas particulate matter trapping apparatus |
| CN110630362A (en) * | 2019-09-21 | 2019-12-31 | 合肥神舟催化净化器股份有限公司 | Automobile exhaust purification catalyst |
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| CN108049941A (en) * | 2018-01-08 | 2018-05-18 | 陈爱国 | A kind of diesel engine exhaust gas treatment device and method |
| CN108412591A (en) * | 2018-02-01 | 2018-08-17 | 江铃汽车股份有限公司 | Automobile exhaust after-treatment system and automobile |
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| CN110725746A (en) * | 2019-10-10 | 2020-01-24 | 徐州瑞田工程机械有限公司 | Diesel engine tail gas purification backpressure alarm device |
| CN112746885A (en) * | 2021-01-14 | 2021-05-04 | 无锡市隆盛轨道科技有限公司 | Tail gas purification system and purification method for oil-fired train |
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| CN112761756B (en) * | 2021-01-14 | 2023-11-24 | 无锡市隆盛轨道科技有限公司 | Tail gas treatment system for fuel oil train and control method thereof |
| CN112746885B (en) * | 2021-01-14 | 2023-11-24 | 无锡市隆盛轨道科技有限公司 | Tail gas purifying system and purifying method for fuel oil train |
| CN114017164A (en) * | 2021-12-01 | 2022-02-08 | 无锡市隆盛轨道科技有限公司 | Tail gas purification system for fuel oil train |
| CN114837782A (en) * | 2022-06-08 | 2022-08-02 | 凯龙高科技股份有限公司 | Emission reduction device of fixed source diesel engine and control method thereof |
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