CN108714360A - A kind of exhaust treatment system - Google Patents
A kind of exhaust treatment system Download PDFInfo
- Publication number
- CN108714360A CN108714360A CN201810974010.3A CN201810974010A CN108714360A CN 108714360 A CN108714360 A CN 108714360A CN 201810974010 A CN201810974010 A CN 201810974010A CN 108714360 A CN108714360 A CN 108714360A
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- Prior art keywords
- gas
- exhaust
- heater
- treatment system
- exhaust treatment
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of exhaust treatment systems, summarize connecting tube, heater, waste gas purification apparatus, adjustable speed fan including collection exhaust gas, wherein heater is used to heat the gas of internal circulation, and waste gas purification apparatus can purify exhaust gas, and adjustable speed fan is used to adjust the flow of gas；Further include return duct, and return duct one end and the gas outlet of adjustable speed fan connect, the other end is connect with heater air inlet.Using exhaust treatment system provided by the present application, start heater first at work, waste gas purification apparatus is preheated using heat radiation and the high-temperature gas circulated, the carrier of waste gas purification apparatus is made to be in operating temperature；Then make to summarize circulation exhaust gas to be treated in connecting tube, heater heats the exhaust gas of circulation at this time, and waste gas purification apparatus carries out purified treatment, and making that treated, exhaust gas meets discharge standard of air pollutants, realizes the effect for reducing environmental pollution.
Description
Technical field
The present invention relates to engine exhaust Treatment process fields, more specifically to a kind of exhaust treatment system.
Background technology
Especially diesel engine manufacturing enterprise of engine production enterprise can be discharged when carrying out engine operating test to outside
Exhaust gas, and contain a large amount of soots, CO (carbon monoxide), HC (hydrocarbon), NO in exhaust gasXPollutions such as (oxynitrides)
Object is unable to reach the atmosphere pollutants emission standards in country/place, therefore exhaust gas direct emission can cause environmental pollution.And show
Have in technology, in the Engine Block Test stage, the usually not perfect waste gas pollution control and treatment system of engine production enterprise causes peripheral ring
The pollution in border.
It is current art technology in conclusion how to provide a kind of exhaust treatment system that can reduce environmental pollution
Personnel's problem to be solved.
Invention content
In view of this, the object of the present invention is to provide a kind of exhaust treatment system, test phase can be operated in engine
Exhaust gas is purified, pollution of the exhaust gas to environment is reduced.
To achieve the goals above, the present invention provides the following technical solutions：
A kind of exhaust treatment system includes summarizing connecting tube, the remittance for collect the exhaust gas between Engine Block Test
The gas passage of total connecting tube gas outlet is equipped with the heater for heat gas, is filled for purifying the waste gas purification of exhaust gas successively
It sets, the adjustable speed fan for adjusting pressure at expulsion；Further include one end connect with the gas outlet of the adjustable speed fan, the other end and institute
State the return duct of heater air inlet connection.
Preferably, further include for exporting the exhaust gas between each Engine Block Test to the exhaust for summarizing connecting tube
Branch pipe, each exhaust branch pipe are equipped with the valve for controlling extraction flow.
Preferably, the gas outlet of the adjustable speed fan is additionally provided with the exhaust tube for facilitating gas to be discharged.
Preferably, the waste gas purification apparatus includes first reactor for purifying CO, HC, soot and for purifying
NOXSCR reactors, and the heater, the first reactor and the SCR reactors are sequentially connected.
Preferably, the first reactor includes the DPF reactions of the DOC reactors and processing soot for purifying CO, HC
Device, and the gas outlet of the DOC reactors is connect with the air inlet of the DPF reactors.
Preferably, the first reactor further includes shell, and the DOC reactors and the DPF reactors are mounted on
In the shell.
Preferably, the heater is electric heater or gas heater or diesel fuel heater.
Preferably, the return duct is equipped with the motor-driven valve of control gas break-make.
Preferably, the return duct is equipped with the check valve for controlling gas flow.
Preferably, the return duct is equipped with the drainage wind turbine for enhancing gas flowing.
Exhaust treatment system provided by the invention include collect exhaust gas summarize connecting tube, heater, waste gas purification apparatus,
Adjustable speed fan and return duct, wherein heater are used to heat the gas of internal circulation, and waste gas purification apparatus can carry out exhaust gas
Purification, adjustable speed fan is for adjusting pressure at expulsion；Return duct one end and the gas outlet of adjustable speed fan connect, the other end and heater
Air inlet is connected to.
During the work time, start heater and adjustable speed fan first, the air after control heating is in return duct, heating
It is circulated inside device, waste gas purification apparatus, waste gas purification apparatus is made to reach the temperature needed for work.Then by Engine Block Test
Between exhaust gas be collected to and summarize in connecting tube, exhaust gas is final to pass through by the heating of heater, the purified treatment of waste gas purification apparatus
Cross the gas outlet discharge of adjustable speed fan.
Exhaust treatment system provided by the present application can preheat waste gas purification apparatus using heater and return duct,
It is then purified using waste gas purification apparatus, making that treated, exhaust gas meets discharge standard of air pollutants, realizes
Reduce the effect of environmental pollution.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of exhaust treatment system provided by the present invention.
Reference numeral in Fig. 1 is：
Exhaust branch pipe 1, valve 2, summarize connecting tube 3, heater 4, first reactor 5, SCR reactors 6, adjustable speed fan 7,
9, return duct 10 between exhaust tube 8, Engine Block Test.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Core of the invention is to provide a kind of exhaust treatment system, can operate test phase in engine and purify exhaust gas,
Reduce pollution of the exhaust gas to environment.
Referring to FIG. 1, Fig. 1 is the structural schematic diagram of exhaust treatment system provided by the present invention.
Include summarizing for collect between Engine Block Test 9 exhaust gas the present invention provides a kind of exhaust treatment system
Connecting tube 3, the gas passage for summarizing 3 gas outlet of connecting tube are equipped with the heater 4 for heat gas, for purifying exhaust gas successively
Waste gas purification apparatus, the adjustable speed fan 7 for adjusting pressure at expulsion；Further include one end connect with the gas outlet of adjustable speed fan 7,
The return duct 10 that the other end is connect with 4 air inlet of heater.
Specifically, summarize connecting tube 3 exhaust gas that between Engine Block Test 9 generate in test phase can be exported to itself
Inside pipeline.Heater 4 is connect with the gas outlet for summarizing connecting tube 3, primarily serves preheating waste gas purifier and heating exhaust gas
Effect, can specifically select electric heater, gas heater, diesel fuel heater or other kinds of heating device.
It should be noted that the heating power of heater 4 needs that demand is combined to be specifically chosen, waste gas purification apparatus is carried out
After preheating, required operating temperature when waste gas purification apparatus can be made to reach highest catalytic efficiency.In addition, being surveyed in engine
During examination, the practical heating power of heater 4 needs the operating mode in conjunction with engine to be adaptively adjusted.When engine is in small
When load condition is tested, the delivery temperature of engine is relatively low, then exhaust gas needs raised temperature larger, and heater 4 is in big work(
Rate working condition；And when engine is in high load working condition test, the temperature of exhaust gas is higher, and heater 4 is in small work(at this time
Rate.
Waste gas purification apparatus is connect with the gas outlet of heater 4, for being purified to the exhaust gas that engine generates.Start
The exhaust gas that machine generates includes mainly CO, HC, NOXAnd soot, and since the fuel that engine types are different, use is different,
There is also differences for the type and content of each ingredient in exhaust gas.It should be understood that waste gas purification apparatus can be multiple reactor strings
The combination unit of connection, each reactor can individually be purified for corresponding pollutant.For example, waste gas purification apparatus has
Body includes DOC (Diesel Oxidation Catalyst, diesel oxidation conversion equipment) reactor, DPF (Diesel
Particulate Filter, particulate filter) reactor and SCR (Selective Catalytic Reduction, selection
Type reduction apparatus) reactor, CO, HC be mainly oxidized to CO by wherein DOC reactors2、H2O, at the same can reduce in soot can
Dissolubility organic principle；DPF reactors are mainly filtered the insoluble components in soot；SCR reactors are mainly by NOXTurn
Turn to N2And H2O。
It should be noted that the used in amounts of the catalyst carrier of waste gas purification apparatus will be specifically chosen according to actual demand.
For example, can according between Engine Block Test 9 maximum test engine power and current untreated discharge capacity reference value, in conjunction with
9 running rates simultaneously between productive temp and Engine Block Test, plan as a whole to calculate between multiple Engine Block Tests 9 summarize after total exhaust
Flow and total release, and determine each catalyst converter to match using the computation model of the engine exhaust of existing maturation post-processing
The volume of carrier.
It should be understood that in order to ensure the operation of exhaust treatment system efficiently, stable, it can also be to gas in the course of work
Flow, temperature, pressure, NOXIt is monitored.For example, in 4 front end measurement exhaust gas flow of heater, temperature and pressure, heater
4 rear end measuring temperatures, the equal measuring temperature in each reactor front-end and back-end and pressure, the front-end and back-end of SCR reactors 6 also carry out
NOXDetection.
Adjustable speed fan 7 is arranged in the gas outlet of waste gas purification apparatus, is mainly used for taking out exhaust gas from waste gas purification apparatus
Go out, exhaust gas is made to be emitted into external environment.In addition, the operating mode due to test phase engine may be different, cause to summarize connection
The exhaust gas flow of pipe 3 is different, and adjustable speed fan 7 can adjust pressure at expulsion according to exhaust gas flow in use, that is, need to drop
The rotating speed for then increasing adjustable speed fan 7 when low pressure at expulsion, to meet the technology requirement of Engine Block Test.Optionally, for side
Just exhaust tube 8 can also be arranged in the gas outlet of the discharge of gas, adjustable speed fan 7, to be drained to gas.
Return duct 10 is arranged in 7 rear end of 4 front end of heater and adjustable speed fan, is mainly used for carrying out waste gas purification apparatus pre-
Heat.In warm, it is first turned on heater 4 and adjustable speed fan 7, while summarizing the exhaust gas that do not circulate in connecting tube 3, at this point,
By heater 4 heating after high temperature air in heater 4, waste gas purification apparatus, adjustable speed fan 7 and return duct 10 recycle stream
It is dynamic, waste gas purification apparatus is heated, while the effect of waste gas purification apparatus thermal radiation and heat up.Return duct 10 can add
The pre- thermal efficiency of fast waste gas purification apparatus, shortens preheating time, reduces the energy consumption of preheating.
Using exhaust treatment system provided by the present application, starts heater 4 first at work, utilize heat radiation and cycle
The high-temperature gas of flowing preheats waste gas purification apparatus, and the carrier of waste gas purification apparatus is made to be in operating temperature.Then make
Summarize circulation exhaust gas to be treated in connecting tube 3, heater 4 heats the exhaust gas of circulation at this time, waste gas purification apparatus
Purified treatment is carried out, CO, HC, NO in exhaust gas are effectively reducedXWith the discharge capacity of the pollutants such as soot, reduce ring caused by exhaust gas
It pollutes in border.
Further, in order to avoid exhaust gas is expelled directly out without waste gas purification apparatus, a kind of embodiment provided by the present application
In, return duct 10 is equipped with the motor-driven valve of control gas break-make.During preheating waste gas purifier, motor-driven valve, which is in, to be opened
State.And preheat and finish when summarizing that circulation has exhaust gas in connecting tube 3, on the one hand, can select to close motor-driven valve, to make exhaust gas
All by heater 4 and waste gas purification apparatus.On the other hand, can also be arranged for controlling gas flow in return duct 10
Check valve is only flowed from the ends B of return duct 10 to the ends A since check valve can control gas, and exhaust gas can not pass through reflux
Pipe 10 is expelled directly out.
In order to further increase the mobility of gas, shorten preheating time, on the basis of any one above-mentioned embodiment,
Return duct 10 is equipped with the drainage wind turbine for enhancing gas flowing.Specifically, in view of warm-up phase adjustable speed fan 7 power compared with
Low, recyclegas mobility is poor, therefore can reinforce the flow effect of gas in the setting drainage wind turbine of return duct 10, improves useless
The pre- thermal efficiency of air purifying apparatus.It should be understood that in warm-up phase, if drainage wind turbine can ensure the unobstructed of gas circulation,
Then adjustable speed fan 7 may be at halted state, and preheating finishes when being purified to exhaust gas, restarts adjustable speed fan 7.
Optionally, it controls for convenience, exhaust treatment system further includes for will be 9 between one or more Engine Block Tests
Exhaust gas is exported to the exhaust branch pipe 1 for summarizing connecting tube 3, and each exhaust branch pipe 1 is equipped with valve 2.Specifically, in view of engine is given birth to
Production enterprise may be equipped with 9 between multiple Engine Block Tests tested, therefore 9 right between each Engine Block Test in the present embodiment
Should be provided with exhaust branch pipe 1, the gas vent of each exhaust branch pipe 1 with summarize connecting tube 3 and be tightly connected, to make each engine survey
9 exhaust gas, which is collected to, between examination summarizes in connecting tube 3.Each exhaust branch pipe 1 is respectively provided with valve 2, and valve 2 can control corresponding exhaust
The break-make of branch pipe 1 can also control the extraction flow of corresponding exhaust branch pipe 1 if demand.In waste gas purification apparatus warm-up phase,
Valve 2 is closed, and between the Engine Block Test for having production task 9 valve 2 is opened after the completion of preheating, each engine is made to survey
The exhaust gas of 9 discharges, which enters, between examination summarizes connecting tube 3.
Optionally, in a kind of embodiment provided by the present application, waste gas purification apparatus includes for purifying CO, HC, soot
First reactor 5 and for purifying NOXSCR reactors 6, and heater 4, first reactor 5, SCR reactors 6 and speed-regulating wind
Machine 7 is sequentially connected.Specifically, first reactor 5 combines the unit for DOC+DPF, CO, HC and soot can tentatively be located
Reason, SCR reactors 6 are by the NO in the exhaust gas after preliminary treatmentXIt is purified.During the work time, it is needed CO when handling CO
Part NO can be oxidized to NO by oxidation, the process2, and the NO of proper ratio and NO2Be conducive to follow-up SCR reactors 6 to NOX
It is handled, therefore, SCR reactors 6 are arranged in the rear end of first reactor 5.
Optionally, in a kind of embodiment provided by the present application, first reactor 5 includes being reacted for purifying the DOC of CO, HC
The DPF reactors of device and processing soot, and the gas outlet of DOC reactors is connect with the air inlet of DPF reactors.Specifically, DOC
Reactor can be such that exhaust gas temperature increases the oxidation of CO, beneficial to soot processing procedure.Therefore, DOC reactors are arranged
In the front end of DPF reactors.
In actual use, the volume of DOC reactors and DPF reactors is usually smaller, therefore the two can collect
Being integrally formed formula structure, i.e. first reactor 5 is provided with shell, and DOC reactors and DPF reactors are mounted in shell, from
And simplify the assembling process of exhaust treatment system.It should be understood that DOC reactors and DPF reactors can also use independent cloth
The mode set, handles exhaust gas.
Optionally, in order to optimize the using effect of waste gas purification apparatus, in the present embodiment, SCR reactors 6 are equipped with for supervising
The temperature sensor of testing temperature, and temperature sensor is connect by controller with heater 4.Specifically, according to SCR reactors 6
Working characteristics, carrier, which is in optimum working temperature section, can effectively reduce NOX, therefore need to ensure in warm-up phase
The temperature of SCR reactors 6.Temperature sensor is detected the temperature of SCR reactors 6, and Current Temperatures information is sent to
The Current Temperatures of acquisition are compared by controller, controller with preset temperature, and wherein preset temperature is specially the best work of carrier
Make temperature.During the work time, if Current Temperatures are less than preset temperature, controller increases the heating power of heater, to protect
Hinder the efficient progress of chemical reaction.
In addition, controller can also be connect with valve 2, the valve of exhaust branch pipe 1 is then opened when temperature reaches preset temperature
Door 2 makes exhaust gas enter and summarizes connecting tube 3；Otherwise heater 4 is continued with to be preheated.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Exhaust treatment system provided by the present invention is described in detail above.Specific case pair used herein
The principle of the present invention and embodiment are expounded, and the explanation of above example is only intended to help to understand method of the invention
And its core concept.It should be pointed out that for those skilled in the art, before not departing from the principle of the invention
It puts, can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the guarantor of the claims in the present invention
It protects in range.
Claims (10)
1. a kind of exhaust treatment system, which is characterized in that including being used to summarize company by what the exhaust gas of (9) between Engine Block Test collected
It takes over (3), the gas passage for summarizing connecting tube (3) gas outlet is equipped with the heater (4) for heat gas, is used for successively
Purify waste gas purification apparatus, the adjustable speed fan (7) for adjusting pressure at expulsion of exhaust gas；Further include one end and the adjustable speed fan
(7) return duct (10) that gas outlet connection, the other end are connect with the heater (4) air inlet.
2. exhaust treatment system according to claim 1, which is characterized in that further include being used for each Engine Block Test
Between the exhaust gas of (9) export to the exhaust branch pipe (1) for summarizing connecting tube (3), each exhaust branch pipe (1) is equipped with for controlling
The valve (2) of extraction flow processed.
3. exhaust treatment system according to claim 2, which is characterized in that the gas outlet of the adjustable speed fan (7) is also set
There is the exhaust tube (8) for facilitating gas to be discharged.
4. exhaust treatment system according to claim 3, which is characterized in that the waste gas purification apparatus includes for purifying
CO, HC, the first reactor (5) of soot and for purifying NOXSCR reactors (6), and the heater (4), described first
Reactor (5) and the SCR reactors (6) are sequentially connected.
5. exhaust treatment system according to claim 4, which is characterized in that the first reactor (5) includes for net
Change the DOC reactors of CO, HC and handle the DPF reactors of soot, and the gas outlet of the DOC reactors is reacted with the DPF
The air inlet of device connects.
6. exhaust treatment system according to claim 5, which is characterized in that the first reactor further includes shell, institute
It states DOC reactors and the DPF reactors is mounted in the shell.
7. exhaust treatment system according to claim 6, which is characterized in that the heater (4) is electric heater or day
Right hot-air heater or diesel fuel heater.
8. according to the exhaust treatment system described in claim 1~7 any one, which is characterized in that the return duct (10) sets
There is the motor-driven valve of control gas break-make.
9. exhaust treatment system according to claim 8, which is characterized in that the return duct (10) is equipped with for controlling gas
The check valve of body flow direction.
10. exhaust treatment system according to claim 9, which is characterized in that the return duct (10) is equipped with for enhancing
The drainage wind turbine of gas flowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810974010.3A CN108714360A (en) | 2018-08-24 | 2018-08-24 | A kind of exhaust treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810974010.3A CN108714360A (en) | 2018-08-24 | 2018-08-24 | A kind of exhaust treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108714360A true CN108714360A (en) | 2018-10-30 |
Family
ID=63914541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810974010.3A Pending CN108714360A (en) | 2018-08-24 | 2018-08-24 | A kind of exhaust treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108714360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603366A (en) * | 2018-12-14 | 2019-04-12 | 江苏海企化工仓储股份有限公司 | It is a kind of to be collected the storage tank equipment with pressure regulating mechanism to exhaust gas |
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| CN1662293A (en) * | 2002-06-19 | 2005-08-31 | 纳幕尔杜邦公司 | Method and apparatus for reducing a nitrogen oxide |
| US20040206069A1 (en) * | 2003-04-16 | 2004-10-21 | Prasad Tumati | Thermal management of exhaust systems |
| CN102300623A (en) * | 2008-12-22 | 2011-12-28 | 卡特彼勒公司 | Nox Reduction System Having A Separator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109603366A (en) * | 2018-12-14 | 2019-04-12 | 江苏海企化工仓储股份有限公司 | It is a kind of to be collected the storage tank equipment with pressure regulating mechanism to exhaust gas |
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