CN106401703B - Tail gas from diesel electric generator purification system and purification method - Google Patents
Tail gas from diesel electric generator purification system and purification method Download PDFInfo
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- CN106401703B CN106401703B CN201610321493.8A CN201610321493A CN106401703B CN 106401703 B CN106401703 B CN 106401703B CN 201610321493 A CN201610321493 A CN 201610321493A CN 106401703 B CN106401703 B CN 106401703B
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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
-
- 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
-
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of tail gas from diesel electric generator purification system and purification methods, including exhaust gas cleaner and automatic control device.The exhaust gas cleaner includes air inlet assembly, more than one clean unit, bypass block and gas outlet component, and the air inlet assembly includes preceding gas collector (2) and one or more air inlets (1)；The gas outlet component includes rear gas collector (11) and one or more gas outlets (12)；The clean unit includes heating component (5), catalytic module (7), grain catcher (9) and the big ripple pipe (10) set gradually along tail gas outflow direction；The bypass block includes bypass pipe (8), by-passing valve (3) and small corrugated pipe (4).The present invention is anti-blocking, explosion-proof, and vent gas treatment and deodorizing effect are obvious, continues working and long service life.
Description
Technical field
The invention belongs to the field of exhaust gas purification of diesel engine, especially tail gas from diesel electric generator purification techniques field.
Background technique
Diesel generating set initial start stage (about 3min), smoke outlet are emerged a large amount of black smokes, black after diesel engine is stable
Though cigarette is reduced, exist always, especially in cold season, smoke outlet can generate a large amount of smog.Diesel generating set row
It puts and contains a large amount of soot particulates, hydro carbons, carbon monoxide, carbon dioxide, oxynitrides, vapor, oxygen, nitrogen in tail gas
Gas, sulfur dioxide etc., main matter are soot particulates, and discharge amount is about tens times of gasoline engine, untreated to will cause
Heavy environmental pollution.Existing diesel vent gas treatment generallys use " continuously trapping decomposition technique (CRT) ", and the technology is by one group of oxygen
Change catalyst unit (DOC) and trap (DPF) composition, using the particulate matter (black smoke main component) in DPF trapping exhaust gas, simultaneously
Regenerate DPF under certain condition using DOC, it can be achieved that exhaust particulate object (PM), hydrocarbons (HC), carbon monoxide
(CO), continuous catalysis, trapping and the decomposition of the pernicious gases such as nitrogen oxides (NOx).This method concrete principle is: when diesel oil is sent out
Motor group on-load running hours, exhaust temperature can achieve 400 DEG C or more, the soot being gathered in wall flow type ceramic filter element
The harmful substances such as particulate matter (PM), CO, THC are burned decompose under the action of catalyst, reach regenerated purpose.
Above-mentioned method solves the problems, such as high pollution when diesel generating set continuous service, but works as diesel oil in use
When generating set is in underload or intermittent duty, since soot particulate (PM), CO, THC etc. are continuously increased, DPF gas permeability
It is deteriorated, diesel exhaust gas resistance can be continuously increased.Therefore the prior art has the following problems: when diesel-driven generator idling, load
When low or when just starting, since exhaust temperature is too low, DOC be can not work normally, and DPF is easily caused to block；To solve this problem, have
People's pre-buried heater strip in the core component cordierite honeycomb ceramic (filter core) of DPF, when DOC can not work normally, actively again
Raw DPF, this mode are easy to appear vigorous combustion (detonation) again, DPF are caused to fail, and also result in cordierite honeycomb ceramic production
Cost is got higher and not convenient for safeguarding.
Summary of the invention
To overcome the deficiencies in the prior art, the present invention provides tail gas from diesel electric generator purification system, the system
Tail gas clean-up is high-efficient, and avoids the risk that thermal explosion causes DPF failure and DPF to block.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of tail gas from diesel electric generator purification system, including exhaust gas cleaner, the exhaust gas cleaner include into
Port component, more than one clean unit, bypass block and gas outlet component, the air inlet assembly include preceding gas collector
(2) it is set on preceding gas collector (2) with more than one air inlet (1), the air inlet (1)；The gas outlet component includes
Gas collector (11) and more than one gas outlet (12) afterwards, the gas outlet (12) are set on rear gas collector (11)；It is described net
Changing unit includes the heating component (5) set gradually along tail gas outflow direction, catalytic module (7), grain catcher (9) and big
Bellows (10), and the heating component (5) is connected to preceding gas collector (2), and the big ripple pipe (10) and rear gas collector
(11) it is connected to；The bypass block includes bypass pipe (8), by-passing valve (3) and small corrugated pipe (4), and described bypass pipe (8) one end is logical
It crosses by-passing valve (3) to connect with preceding gas collector (2), the other end is connect by small corrugated pipe (4) with rear gas collector (11).
It further, further include automatic control device, the automatic control device includes monitoring sensing unit, control processing
Unit and execution unit, the monitoring sensing unit include temperature sensor (51) and pressure sensor (52), the temperature
Sensor (51) and pressure sensor (52) are installed in heating component (5), in preceding gas collector (2) or rear gas collector (11),
And the temperature sensor (51) is used to detect the temperature of tail gas, and sends the temperature signal to control transmitter, and it is described
Pressure sensor (52) is used to detect the pressure of tail gas, and sends the pressure signal to control transmitter；The execution unit
Including electric heater (53) and bypass valve control (31), the electric heater (53) is installed in heating component (5), and described
Bypass valve control (31) is connected with by-passing valve (3)；The control processing unit includes controlling transmitter and PLC controller,
Control interface inputs display end, the temperature signal and pressure that the control transmitter is used to detect temperature sensor (51)
The pressure signal of force snesor (52) detection sends PLC controller to；The PLC controller is received through input display end input
Control parameter, and temperature signal that transmitter is sent will be controlled and pressure signal is compared with control parameter, to judge to be
No starting electric heater (53) is heated and whether is started bypass valve control (31) and opens by-passing valve (3)；The input display end
For input control parameter, the control parameter includes that catalytic module (7) operating temperature and the first preset pressure and second are default
Pressure difference, while showing the temperature and pressure difference of measurement；The starting of control interface control electric heater (53) close and
Bypass the switch of valve control (31).
Preferred: the grain catcher (9) is wall flow type ceramic filter element grain catcher (DPF).
Preferred: the catalytic module (7) is the oxidation catalysis unit (DOC) of metal material or (DOC) of ceramic material；
The wall flow type ceramic filter element uses a kind of patent " pottery of carbofrax material, especially Patent No. CN200510010967.9
The microparticles collection device and its their preparation method that porcelain catalyst carrier and the carrier are constituted " listed by the clay of method preparation burn
The carbofrax material of knot is made.
Preferred: the exhaust temperature of heating component (5) outflow is between 200-550 DEG C.Heating component (5) stream
Tail gas pressure out is being less than between 8kPa.
It is preferred: the first preset pressure setting are as follows: 5kPa-15kPa；Second preset pressure should be greater than
One preset pressure, and the second preset pressure are as follows: 8kPa-20kPa.
Preferred: the temperature sensor is the thermocouple that precision is K indexing or more.
Preferred: between less than 50 μm, pore wall thickness is being less than 0.4mm in the aperture of the grain catcher (9).
It is preferred: the percent opening 40-60%, hole count 10-47 every square centimeter of the grain catcher (9).
It is preferred: catalyst can be coated in the wall flow type ceramic filter element.
A kind of tail gas from diesel electric generator purification method, input display end in input catalytic module (7) operating temperature and
First preset pressure and the second preset pressure；Diesel generating set is started, the tail gas of diesel generating set enters purification system
System, the exhaust temperature of temperature sensor (51) detection at this time, the tail gas pressure of pressure sensor (52) detection at this time；Control pick-up
Device sends the pressure signal that the temperature signal that temperature sensor (51) detects and pressure sensor (52) detect to PLC control
Device；PLC controller is compared the temperature signal that transmitter is sent is controlled with the operating temperature of input catalytic module (7), if
Exhaust temperature is lower than the operating temperature of catalytic module (7), by control interface starting electric heater (53) auxiliary heating, directly
Stop electric heater (53) when rising to catalytic module (7) operating temperature to exhaust temperature.
PLC controller is compared the pressure signal that transmitter is sent is controlled with the first preset pressure, if pressure signal
Reach the first preset pressure, catalytic regeneration is carried out by control interface starting electric heater (53) auxiliary heating, so that tail
Atmospheric pressure reduces, and when pressure signal is lower than the first preset pressure, stops electric heater (53) heating 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),
Enter partial tail gas in bypass pipe (8) from by-passing valve (3).
When diesel generating set just starts, and exhaust temperature is lower than the operating temperature for inputting catalytic module (7), starting electricity adds
Hot device auxiliary heating, temperature stop when rising to the operating temperature of input catalytic module (7)；When diesel generating set works normally,
Exhaust temperature is higher, is able to maintain that the normal work of catalyst, and electric heater is not run.
When tail gas import and export pressure difference reaches the first preset pressure, when filter core blocks but is not serious, the automatic electricity that starts adds
Hot device carries out catalytic regeneration, after pressure difference is fallen after rise, stops electric heater；When tail gas import and export pressure difference reaches the second preset pressure, filter
Core blocking is serious, and the automatic electric heater that starts carries out catalytic regeneration, opens simultaneously by-passing valve, avoids diesel engine back pressure excessive, damages
Bad generator, and the annunciator service personnel that alarms overhauls.Pressure difference closes by-passing valve after falling after rise, it is pre- that pressure difference falls back to first
If when below pressure difference, stopping electric heater.
Tail gas from diesel electric generator purification system and purification method provided by the invention have following compared with prior art
The utility model has the advantages that
1. black smoke processing and deodorizing effect are obvious, opaque rate is close to zero.
2. diesel generating set starts, purification system starts and controls automatically, easy to operate.
3. the filter core that system uses is that the carbofrax material especially patent of Patent No. CN200510010967.9 is " a kind of
The microparticles collection device and its their preparation method that ceramic catalyst carrier and the carrier are constituted " listed by method preparation clay
The silicon carbide wall flow ceramic element of sintering, long service life, operating cost is low, and heat resisting temperature is high, and there is no cause because of thermal explosion
The case where filter core fails.
4. regeneration can be effectively controlled in intelligent regenerative control system, energy consumption is reduced.
5. design has automatic by pass valve open function, guarantees the normal work of diesel generating set in abnormal cases, keep away
Exempt to block the case where causing diesel generating set that can not work because of purification system.
6. modular construction, simple to install is convenient for safeguarding.
Detailed description of the invention
Fig. 1 is the first structural schematic diagram of the invention；
Fig. 2 is tail gas control section of the present invention schematic diagram；
Fig. 3 is second of structural schematic diagram of the invention；
Fig. 4 is the third structural schematic diagram of the invention；
Fig. 5 is the 4th kind of structural schematic diagram of the invention；
Wherein, 1 is air inlet, and 2 be preceding gas collector, and 3 be by-passing valve, and 31 be bypass valve control, and 4 be small corrugated pipe, and 5 are
Heating component, 51 be temperature sensor, and 52 be pressure sensor, and 53 be electric heater, and 7 be catalytic module (DOC), and 8 be bypass
Pipe, 9 be grain catcher (DPF), and 10 be big ripple pipe, and 11 be rear gas collector, and 12 be gas outlet.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
Embodiment 1
Tail gas from diesel electric generator purification system, as shown in Figure 1, 2, including exhaust gas cleaner and automatic control device,
The exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet component, the air inlet
Component includes preceding gas collector 2 and an air inlet 1, before the air inlet 1 is set on gas collector 2；The gas outlet component packet
Rear gas collector 11 and a gas outlet 12 are included, the gas outlet 12 is set on rear gas collector 11；The clean unit includes edge
Tail gas outflow the direction heating component 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 that set gradually, and it is described plus
Hot component 5 is connected to preceding gas collector 2, and the big ripple pipe 10 is connected to rear gas collector 11；The bypass block includes bypass
Pipe 8, by-passing valve 3 and small corrugated pipe 4, described 8 one end of bypass pipe are connect by by-passing valve 3 with preceding gas collector 2, and the other end passes through small
Bellows 4 is connect with rear gas collector 11.
The automatic control device includes monitoring sensing unit, control processing unit and execution unit, and the monitoring passes
Sense unit includes temperature sensor 51 and pressure sensor 52, and the temperature sensor 51 and pressure sensor 52, which are installed in, to be added
In hot component 5, and the temperature sensor 51 is used to detect the temperature in tail gas stream overheat component 5, and the temperature signal is passed
Give control transmitter, and the pressure sensor 52 is used to detect tail gas and flows through pressure in heating component 5, and by the pressure
Signal sends control transmitter to；The execution unit includes electric heater 53 and bypass valve control 31, the electric heater
53 are installed in heating component 5, and the bypass valve control 31 is connected with by-passing valve 3；The control processing unit includes
Transmitter and PLC controller are controlled, control interface inputs display end, and the input display end is used for input control parameter,
The control parameter includes 7 operating temperature of catalytic module and the first preset pressure and the second preset pressure, while showing measurement
Temperature and pressure difference；The starting of the control interface control electric heater 53 is closed and the switch of bypass valve control 31.
The control transmitter is used to be converted to the temperature signal that K-type thermocouple 51 detects the temperature signal of numeric type, and sends to
PLC controller, while the pressure signal for the pressure signal that pressure sensor 52 detects to be converted to numeric type, and send to
PLC controller；The PLC controller receives the control parameter inputted by input terminal, receives the temperature that control transmitter is sent
Signal and pressure signal, and temperature signal is compared with control parameter, if temperature signal starts not in control parameter
Electric heater 53 heats；Pressure signal is compared with control parameter simultaneously, if pressure signal is controlled not in control parameter
System bypass valve control 31 opens by-passing valve 3.
The grain catcher 9 is wall flow type ceramic filter element grain catcher DPF.
The catalytic module 7 is the oxidation catalysis unit (DOC) of metal material or (DOC) of ceramic material；The wall stream
Formula ceramic element is using a kind of carbofrax material especially patent of Patent No. CN200510010967.9 " ceramic catalyst load
The microparticles collection device and its their preparation method that body and the carrier are constituted " listed by method preparation vitrified bond silicon carbide
Material is made.
The exhaust temperature that the heating component 5 flows out is between 200-550 DEG C.The tail gas pressure that the heating component 5 flows out
Power is being less than between 8kPa.
The first preset pressure setting are as follows: 5kPa-15kPa；It is default that second preset pressure should be greater than first
Pressure difference, and the second preset pressure are as follows: 8kPa-20kPa.
The temperature sensor is the thermocouple that precision is K indexing or more.
Between less than 50 μm, pore wall thickness is being less than 0.4mm in the aperture of the grain catcher 9.
The percent opening 40-60%, hole count 10-47 every square centimeter of the grain catcher 9.
Catalyst can be coated in the wall flow type ceramic filter element.
A kind of tail gas from diesel electric generator purification method inputs 7 operating temperature of catalytic module and the in input display end
One preset pressure and the second preset pressure；Diesel generating set is started, the tail gas of diesel generating set enters purification system,
The exhaust temperature of the detection of temperature sensor 51 at this time, the tail gas pressure of the detection of pressure sensor 52 at this time；Controlling transmitter will be warm
The pressure signal that the temperature signal and pressure sensor 52 that degree sensor 51 detects detect sends PLC controller to；PLC controller
The temperature signal that transmitter is sent will be controlled to be compared with the operating temperature of input catalytic module 7, urged if exhaust temperature is lower than
The operating temperature for changing component 7 starts the auxiliary heating of electric heater 53 by control interface, until exhaust temperature rises to catalysis
Stop electric heater 53 when 7 operating temperature of component.
PLC controller is compared the pressure signal that transmitter is sent is controlled with the first preset pressure, if pressure signal
Reach the first preset pressure, the auxiliary heating of electric heater 53 is started by control interface and carries out catalytic regeneration, so that tail gas
Pressure reduction stops electric heater 53 by control interface and heats when pressure signal is lower than the first preset pressure；If pressure
Force signal reaches the second preset pressure, starts bypass valve control 31 by control interface and opens by-passing valve 3, makes part tail
Gas enters in bypass pipe 8 from by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is lower than the operating temperature for inputting catalytic module 7, starting electricity adds
Hot device auxiliary heating, stopping when temperature rises to the operating temperature of input catalytic module 7；When diesel generating set works normally, tail
Temperature degree is higher, is able to maintain that the normal work of catalyst, and electric heater is not run.
Preset pressure one is set as 5kPa, and preset pressure two is set as 8kPa.When tail gas import and export pressure difference reaches 5kPa
When, when filter core blocks but is not serious, the automatic electric heater that starts carries out catalytic regeneration, when pressure difference falls back to 5kPa or less, stops
Only electric heater；Tail gas import and export pressure difference reaches preset pressure: when tail gas import and export pressure difference reaches 8kPa, filter core blocking is tight
When weight, the automatic electric heater that starts carries out catalytic regeneration, opens simultaneously by-passing valve, avoids diesel engine back pressure excessive, damage power generation
Machine when pressure difference falls back to 8kPa or less, closes by-passing valve, when pressure difference falls back to 5kPa or less, stops electric heater.
The device is used for 200kw generating set, and black smoke removal rate reaches 95%；HC removal rate reaches 88%, CO removal rate
Reach 89%.
Embodiment 2
Tail gas from diesel electric generator purification system, as shown in Fig. 3,2, including exhaust gas cleaner and automatic control device,
The exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet component, the air inlet
Component includes preceding gas collector 2 and two air inlets 1；Port component includes rear gas collector 11 and two gas outlets 12 after described；Institute
It states before air inlet 1 is set on gas collector 2；The gas outlet 12 is set on rear gas collector 11, and the clean unit includes edge
Tail gas outflow the direction heating component 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 that set gradually, and it is described plus
Hot component 5 is connected to preceding gas collector 2, and the big ripple pipe 10 is connected to rear gas collector 11；The bypass block includes bypass
Pipe 8, by-passing valve 3, described 8 one end of bypass pipe are connect by by-passing valve 3 with preceding gas collector 2, the other end directly with rear gas collector 11
Connection.
The automatic control device includes monitoring sensing unit, control processing unit and execution unit, and the monitoring passes
Feeling unit includes temperature sensor 51 and pressure sensor 52, before the temperature sensor 51 and pressure sensor 52 are installed in
In gas collector 2, and the temperature sensor 51 is used to detect the temperature of non-purified tail gas, and sends the temperature signal to control
Transmitter, and the pressure sensor 52 is used to detect the pressure of non-purified tail gas, and sends the pressure signal to control and become
Send device；The execution unit includes electric heater 53 and bypass valve control 31, and the electric heater 53 is installed on heating component 5
It is interior, and the bypass valve control 31 is connected with by-passing valve 3；The control processing unit includes control transmitter and PLC control
Device processed, control interface input display end, and the input display end is used for input control parameter, and the control parameter includes
7 operating temperature of catalytic module and the first preset pressure and the second preset pressure, while showing the temperature and pressure difference of measurement；The control
The starting of interface circuit control electric heater 53 processed is closed and the switch of bypass valve control 31.The control transmitter is used for
The temperature signal that K-type thermocouple 51 detects is converted to the temperature signal of numeric type, and sends PLC controller to, is used for simultaneously
The pressure signal that pressure sensor 52 detects is converted to the pressure signal of numeric type, and sends PLC controller to；The PLC
Controller receives the control parameter inputted by input terminal, receives temperature signal and pressure signal that control transmitter is sent, and
Temperature signal is compared with control parameter, if temperature signal not in control parameter, starts the heating of electric heater 53；Together
When pressure signal is compared with control parameter, if pressure signal not in control parameter, control bypass valve control 31
Open by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is lower than the operating temperature of DOC, starting electric heater auxiliary adds
Heat, stopping when temperature rises to DOC operating temperature；When diesel generating set works normally, exhaust temperature is higher, is able to maintain that catalysis
The normal work of agent, electric heater are not run.
Preset pressure one is set as 7kPa, and preset pressure two is set as 12kPa.When tail gas import and export pressure difference reaches 7kPa
When, when filter core blocks but is not serious, the automatic electric heater that starts carries out catalytic regeneration, when pressure difference falls back to 7kPa or less, stops
Only electric heater；Tail gas import and export pressure difference reaches preset pressure: 12kPa, when filter core blocking is serious, starts electric heater automatically
Catalytic regeneration is carried out, by-passing valve is opened simultaneously, avoids diesel engine back pressure excessive, damages generator, pressure difference falls back to 12kPa or less
When, by-passing valve is closed, when pressure difference falls back to 7kPa or less, stops electric heater.
The device is used for 350kw generating set, and black smoke removal rate reaches 93%；HC removal rate reaches 90%, CO removal rate
Reach 87%.
Embodiment 3
Tail gas from diesel electric generator purification system, as shown in Fig. 4,2, including exhaust gas cleaner and automatic control device,
The exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet component, the air inlet
Component includes preceding gas collector 2 and two air inlets 1；Port component includes rear gas collector 11 and a gas outlet 12 after described；Institute
It states before air inlet 1 is set on gas collector 2；The gas outlet 12 is set on rear gas collector 11, and the clean unit includes edge
Tail gas outflow the direction heating component 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 that set gradually, and it is described plus
Hot component 5 is connected to preceding gas collector 2, and the big ripple pipe 10 is connected to rear gas collector 11；The bypass block includes bypass
Pipe 8, by-passing valve 3 and small corrugated pipe 4, described 8 one end of bypass pipe are connect by by-passing valve 3 with preceding gas collector 2, and the other end passes through small
Bellows 4 is connect with rear gas collector 11.
The automatic control device includes monitoring sensing unit, control processing unit and execution unit, and the monitoring passes
Feeling unit includes temperature sensor 51 and pressure sensor 52, before the temperature sensor 51 and pressure sensor 52 are installed in
In gas collector 2 and rear gas collector 11, and the temperature sensor 51 is used to detect the temperature of tail gas, and the temperature signal is transmitted
Control transmitter is given, and the pressure sensor 52 is used to detect the pressure of tail gas, and sends the pressure signal to control and become
Send device；The execution unit includes electric heater 53 and bypass valve control 31, and the electric heater 53 is installed on heating component 5
It is interior, and the bypass valve control 31 is connected with by-passing valve 3；The control processing unit includes control transmitter and PLC control
Device processed, control interface input display end, and the input display end is used for input control parameter, and the control parameter includes
7 operating temperature of catalytic module and the first preset pressure and the second preset pressure, while showing the temperature and pressure difference of measurement；The control
The starting of interface circuit control electric heater 53 processed is closed and the switch of bypass valve control 31.The control transmitter is used for
The temperature signal that K-type thermocouple 51 detects is converted to the temperature signal of numeric type, and sends PLC controller to, is used for simultaneously
The pressure signal that pressure sensor 52 detects is converted to the pressure signal of numeric type, and sends PLC controller to；The PLC
Controller receives the control parameter inputted by input terminal, receives temperature signal and pressure signal that control transmitter is sent, and
Temperature signal is compared with control parameter, if temperature signal not in control parameter, starts the heating of electric heater 53；Together
When pressure signal is compared with control parameter, if pressure signal not in control parameter, control bypass valve control 31
Open by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is lower than the operating temperature of DOC, starting electric heater auxiliary adds
Heat, stopping when temperature rises to DOC operating temperature；When diesel generating set works normally, exhaust temperature is higher, is able to maintain that catalysis
The normal work of agent, electric heater are not run.
Preset pressure one is set as 15kPa, and preset pressure two is set as 20kPa.When tail gas import and export pressure difference reaches
When 15kPa, filter core blocking but it is not serious when, the automatic electric heater that starts carries out catalytic regeneration, pressure difference fall back to 15kPa with
When lower, stop electric heater；Tail gas import and export pressure difference reaches preset pressure: when tail gas import and export pressure difference reaches 20kPa, filter
Core blocking is serious, and the automatic electric heater that starts carries out catalytic regeneration, opens simultaneously by-passing valve, avoids diesel engine back pressure excessive, damages
Bad generator when pressure difference falls back to 20kPa or less, closes by-passing valve, when pressure difference falls back to 15kPa or less, stops electric heater.
The device is used for 600kw generating set, and black smoke removal rate reaches 93%；HC removal rate reaches 88%, CO removal rate
Reach 87%.
Embodiment 4
Tail gas from diesel electric generator purification system, as shown in Fig. 5,2, including exhaust gas cleaner and automatic control device,
The exhaust gas cleaner includes air inlet assembly, two clean units, bypass block and gas outlet component, the air inlet
Component includes preceding gas collector 2 and two air inlets 1；Port component includes rear gas collector 11 and three gas outlets 12 after described；Institute
It states before air inlet 1 is set on gas collector 2；The gas outlet 12 is set on rear gas collector 11, and the clean unit includes edge
Tail gas outflow the direction heating component 5, catalytic module 7, grain catcher 9 and the big ripple pipe 10 that set gradually, and it is described plus
Hot component 5 is connected to preceding gas collector 2, and the big ripple pipe 10 is connected to rear gas collector 11；The bypass block includes bypass
Pipe 8, by-passing valve 3 and small corrugated pipe 4, described 8 one end of bypass pipe are connect by by-passing valve 3 with preceding gas collector 2, and the other end passes through small
Bellows 4 is connect with rear gas collector 11.
As shown in Fig. 2, the automatic control device includes monitoring sensing unit, controls processing unit and execution unit,
The monitoring sensing unit includes temperature sensor 51 and pressure sensor 52, the temperature sensor 51 and pressure sensor 52
Before being installed in gas collector 2 and heating component 5, and the temperature sensor 51 is used to detect the temperature of non-purified tail gas, and
Send the temperature signal to control transmitter, and the pressure sensor 52 is used to detect the pressure of non-purified tail gas, and will
The pressure signal sends control transmitter to；The execution unit includes electric heater 53 and bypass valve control 31, the electricity
Heater 53 is installed in heating component 5, and the bypass valve control 31 is connected with by-passing valve 3；The control processing is single
Member includes control transmitter and PLC controller, and control interface inputs display end, and the input display end is for inputting control
Parameter processed, the control parameter include 7 operating temperature of catalytic module and the first preset pressure and the second preset pressure, are shown simultaneously
The temperature and pressure difference of measurement；Valve control 31 is closed and is bypassed in the starting of the control interface control electric heater 53
Switch.The control transmitter is used to be converted to the temperature signal that K-type thermocouple 51 detects the temperature signal of numeric type, and passes
PLC controller, while the pressure signal for the pressure signal that pressure sensor 52 detects to be converted to numeric type are given, and is passed
Give PLC controller；The PLC controller receives the control parameter inputted by input terminal, receives what control transmitter was sent
Temperature signal and pressure signal, and temperature signal is compared with control parameter, if temperature signal not in control parameter,
Then start the heating of electric heater 53；Pressure signal is compared with control parameter simultaneously, if pressure signal is not in control parameter
It is interior, then it controls bypass valve control 31 and opens by-passing valve 3.
When diesel generating set just starts, when exhaust temperature is lower than the operating temperature of DOC, starting electric heater auxiliary adds
Heat, stopping when temperature rises to DOC operating temperature；When diesel generating set works normally, exhaust temperature is higher, is able to maintain that catalysis
The normal work of agent, electric heater are not run.
Preset pressure one is set as 9kPa, and preset pressure two is set as 16kPa.When tail gas import and export pressure difference reaches 9kPa
When, when filter core blocks but is not serious, the automatic electric heater that starts carries out catalytic regeneration, when pressure difference falls back to 9kPa or less, stops
Only electric heater；Tail gas import and export pressure difference reaches preset pressure: 16kPa, when filter core blocking is serious, starts electric heater automatically
Catalytic regeneration is carried out, by-passing valve is opened simultaneously, avoids diesel engine back pressure excessive, damages generator, pressure difference falls back to 16kPa or less
When, by-passing valve is closed, when pressure difference falls back to 9kPa or less, stops electric heater.
The device is used for 1200kw generating set, and black smoke removal rate reaches 94%；HC removal rate reaches 90%, CO removal rate
Reach 88%.
Claims (8)
1. a kind of tail gas from diesel electric generator purification system, it is characterised in that: including exhaust gas cleaner, the tail gas clean-up dress
It sets including air inlet assembly, more than one clean unit, bypass block and gas outlet component, the air inlet assembly includes
Preceding gas collector (2) and more than one air inlet (1), the air inlet (1) are set on preceding gas collector (2)；The gas outlet
Component includes rear gas collector (11) and more than one gas outlet (12), and the gas outlet (12) is set to rear gas collector (11)
On；The clean unit includes the heating component (5) set gradually along tail gas outflow direction, catalytic module (7), grain catcher
(9) and big ripple pipe (10), and the heating component (5) is connected to preceding gas collector (2), and the big ripple pipe (10) is with after
Gas collector (11) connection；The bypass block includes bypass pipe (8), by-passing valve (3) and small corrugated pipe (4), the bypass pipe (8)
One end is connect by by-passing valve (3) with preceding gas collector (2), and the other end is connect by small corrugated pipe (4) with rear gas collector (11)；Also
Including automatic control device, the automatic control device includes monitoring sensing unit, control processing unit and execution unit, institute
Stating monitoring sensing unit includes temperature sensor (51) and pressure sensor (52), the temperature sensor (51) and pressure sensing
Device (52) is installed in heating component (5), in preceding gas collector (2) or rear gas collector (11), and the temperature sensor (51)
Control transmitter is sent to for detecting the temperature of tail gas, and by the temperature signal, and the pressure sensor (52) is for examining
The pressure of tail gas is surveyed, and sends the pressure signal to control transmitter；The execution unit includes electric heater (53) and side
Port valve controller (31), the electric heater (53) are installed in heating component (5), and the bypass valve control (31) and side
Port valve (3) is connected；The control processing unit includes control transmitter, PLC controller, control interface and input display
End, the pressure of temperature signal and pressure sensor (52) detection that the control transmitter is used to detect temperature sensor (51)
Signal sends PLC controller to；The PLC controller receives the control parameter by input display end input, and control is become
The temperature signal and pressure signal for sending device to send are compared with control parameter, to judge whether to start electric heater (53) heating
And whether starts bypass valve control (31) and open by-passing valve (3)；The input display end is used for input control parameter, the control
Parameter processed includes catalytic module (7) operating temperature and the first preset pressure and the second preset pressure；The control interface control
The starting of electric heater (53) processed is closed and the switch of bypass valve control (31)；Wherein, the grain catcher (9) is wall
Streaming ceramic element grain catcher.
2. the tail gas from diesel electric generator purification system according to claim 1, it is characterised in that: the catalytic module (7)
For the oxidation catalysis unit of metal material or the oxidation catalysis unit of ceramic material；The wall flow type ceramic filter element is burnt using clay
The carbofrax material of knot is made.
3. the tail gas from diesel electric generator purification system according to claim 1, it is characterised in that: the heating component (5)
The exhaust temperature of outflow is between 200-550 DEG C；The tail gas pressure of heating component (5) outflow is less than 8kPa.
4. the tail gas from diesel electric generator purification system according to claim 1, it is characterised in that: described first is default
Pressure difference setting are as follows: 5kPa-15kPa；Second preset pressure should be greater than the first preset pressure, and the second preset pressure are as follows:
8kPa-20kPa。
5. the tail gas from diesel electric generator purification system according to claim 1, it is characterised in that: the temperature sensing
Device is the thermocouple that precision is K indexing or more.
6. the tail gas from diesel electric generator purification system according to claim 1, it is characterised in that: the grain catcher
(9) less than 50 μm, pore wall thickness is less than 0.4mm in aperture.
7. the tail gas from diesel electric generator purification system according to claim 1, it is characterised in that: the grain catcher
(9) percent opening 40-60%, hole count 10-47 every square centimeter；Catalyst is coated in the wall flow type ceramic filter element.
8. the purification method of tail gas from diesel electric generator purification system described in any claim in a kind of claim 1 to 7,
It is characterized by:
Catalytic module (7) operating temperature and the first preset pressure and the second preset pressure are inputted in input display end；By diesel oil
Generating set starts, and the tail gas of diesel generating set enters purification system, the tail gas temperature of temperature sensor (51) detection at this time
Degree, the tail gas pressure of pressure sensor (52) detection at this time；The temperature signal that control transmitter detects temperature sensor (51)
PLC controller is sent to the pressure signal of pressure sensor (52) detection；PLC controller will control the temperature of transmitter transmission
Signal is compared with the operating temperature of input catalytic module (7), if exhaust temperature is lower than the operating temperature of catalytic module (7),
By control interface starting electric heater (53) auxiliary heating, until exhaust temperature rises to catalytic module (7) operating temperature
When stop electric heater (53)；
PLC controller is compared the pressure signal that transmitter is sent is controlled with the first preset pressure, if pressure signal reaches
First preset pressure carries out catalytic regeneration by control interface starting electric heater (53) auxiliary heating, so that tail gas pressure
Power reduces, and when pressure signal is lower than the first preset pressure, stops electric heater (53) heating by control interface；If pressure
Force signal reaches the second preset pressure, starts bypass valve control (31) by control interface and opens by-passing valve (3), makes portion
Tail gas is divided to enter 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 |
| CN109519258B (en) * | 2018-11-07 | 2024-01-26 | 浙江银轮机械股份有限公司 | SCR (selective catalytic reduction) catalyst assembly with single bypass valve |
| CN110630362B (en) * | 2019-09-21 | 2021-01-19 | 合肥神舟催化净化器股份有限公司 | Automobile exhaust purification catalyst |
| 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 |
| 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 |
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| 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 |
| CN114837782B (en) * | 2022-06-08 | 2023-10-03 | 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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