CN208564704U - Exhaust afterheat utilization system based on marine low-pressure SCR - Google Patents
Exhaust afterheat utilization system based on marine low-pressure SCR Download PDFInfo
- Publication number
- CN208564704U CN208564704U CN201821189446.3U CN201821189446U CN208564704U CN 208564704 U CN208564704 U CN 208564704U CN 201821189446 U CN201821189446 U CN 201821189446U CN 208564704 U CN208564704 U CN 208564704U
- Authority
- CN
- China
- Prior art keywords
- scr
- heat
- heat exchange
- temperature
- exchange unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model discloses a kind of exhaust afterheat utilization system based on marine low-pressure SCR, including the SCR reactor being connect with system for detecting temperature, the gas outlet of the SCR reactor is connected to heat exchange unit, the heat exchange unit heat exchange import is connected to cryogenic piping, the heat exchange unit outlet is connected to solenoid valve, wherein outlet reactor, solenoid valve another way outlet heating module, the heating module are connected to the solenoid valve with SCR reactor all the way；Low temperature heat-conducting medium is passed through in cryogenic piping, low temperature heat-conducting medium becomes high temperature heat conducting medium after heat exchange unit exchanges heat, and is transported to SCR reactor through solenoid valve and carries out waste heat recycling.On the one hand it is uniform to realize inside reactor temperature, stablizes cooling；On the other hand the system also avoids the waste of thermal energy, the drop that economizes on resources is realized with a low cost energy conservation and environmental protection.
Description
Technical field
The utility model relates to the fields boat diesel engine low pressure SCR, concretely relate to a kind of based on marine low-pressure SCR
Exhaust afterheat utilization system.
Background technique
SCR technology (SCR) is being urged for a treatment process of NOx in exhaust emissions of diesel engine
Under the action of agent, reducing agent ammonia or urea are sprayed into, the NOx in tail gas is reduced into N2 and H2O.
In SCR reaction process, reaction temperature control is extremely important, and it is living that catalyst reaction can be reduced when reaction temperature is too low
Property, to influence purification efficiency；Reaction temperature is excessively high to cause catalyst high temperature sintering to inactivate, and will also result in catalyst reaction effect
Rate reduces
During operation, exhaust gas need to carry out additional existing boat diesel engine mostly before entering SCR system reactor
Heating process, consume the energy；And on the other hand, the exhaust phase after by reactor, high temperature air is directly discharged to
Among atmosphere, the partial heat in high temperature air is caused to be lost in vain, can not accomplish waste gas heat utilization, not accomplish energy-saving ring
It protects.
Utility model content
The problem of for background technique, in order to overcome the deficiencies of the prior art, the utility model discloses one kind and is based on
The exhaust afterheat utilization system and method for marine low-pressure SCR, to improve inside reactor temperature or carry out one to temperature of reactor
Fixed maintenance reduces the influence of load variations and external environment variation to inside reactor temperature, promotes to a certain extent anti-
Answer the progress of device internal oxidition reduction reaction.The available waste heat of discharge gas is made full use of, waste gas heat utilization is realized, accomplishes energy conservation
Environmental protection.
The technical solution adopted in the utility model is as follows:
Based on the exhaust afterheat utilization system of marine low-pressure SCR, including the SCR reactor being connect with system for detecting temperature,
The gas outlet of the SCR reactor is connected to heat exchange unit, and the heat exchange unit heat exchange import is connected to cryogenic piping, described to change
Hot cell outlet is connected to reversal valve, the reversal valve wherein outlet reactor all the way, reversal valve another way outlet
Heating module, the heating module are connected to SCR reactor；Low temperature heat-conducting medium, low temperature heat-conducting medium are passed through in cryogenic piping
Become high temperature heat conducting medium after heat exchange unit exchanges heat, is transported to SCR reactor through reversal valve and carries out waste heat recycling.
Preferably, check valve is set between the SCR reactor and heating module；
Preferably, the heat-conducting medium is conduction oil or seawater or fresh water；
Preferably, the reversal valve is two position, three-way electromagnetic change valve；
Preferably, the solenoid directional control valve is single electric control structure；
A kind of application method of exhaust afterheat utilization system based on marine low-pressure SCR, specific steps are also disclosed in the application
It is as follows:
Low temperature heat-conducting medium is passed through in step 1. cryogenic piping, low temperature heat-conducting medium is by heat exchange unit and heat exchange unit
High-temp waste gas heat exchange after become high-temperature medium；
Step 2. system for detecting temperature detects the temperature in SCR reactor, and is situated between to the high temperature after testing result and heat exchange
The temperature of matter is compared；
For step 3. when the temperature in SCR reactor is lower than the temperature of high-temperature medium, high-temperature medium is directly defeated through reversal valve
It is sent to SCR reactor, SCR reactor is heated；It is high when the temperature in SCR reactor is higher than the temperature of high-temperature medium
Warm medium is transported to heating module through reversal valve, is transported to SCR reactor after heated module heating, carries out to SCR reactor
Heat preservation.
Beneficial effect acquired by the utility model is:
Exhaust pipe is cooled down by low temperature heat-conducting medium, high temperature heat conducting medium is collected, by judging SCR reactor
Internal temperature selects to operate the heating of SCR reactor or heat preservation, and it is uniform on the one hand to realize SCR inside reactor temperature, surely
Fixed cooling；On the other hand the waste of thermal energy is also avoided, economizing on resources reduces cost, realizes energy conservation and environmental protection.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this
Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is utility model works process flow diagram flow chart；
In figure, 1-SCR reactor, 2- heat exchange unit, 3- solenoid valve, 4- heating module, 5- check valve.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Embodiment one:
Exhaust afterheat utilization system based on marine low-pressure SCR as shown in Figure 1, including what is connect with system for detecting temperature
The gas outlet of SCR reactor 1, the SCR reactor 1 is connected to heat exchange unit 2, the heat exchange import of heat exchange unit 2 and low temperature
Pipeline connection, the heat exchange unit 2 outlet are connected to solenoid valve 3, the solenoid valve wherein outlet SCR reactor 1 all the way,
Solenoid valve another way outlet heating module 4, the heating module 4 are connected to by reversal valve 5 with SCR reactor 1；It is described to change
It is two position, three-way electromagnetic change valve to valve, the solenoid directional control valve is single electric control structure.Thermally conductive Jie of low temperature is passed through in cryogenic piping
Matter, the heat-conducting medium are preferably conduction oil or seawater or fresh water, and low temperature heat-conducting medium becomes high temperature after heat exchange unit exchanges heat
Heat-conducting medium is transported to SCR reactor 1 through solenoid directional control valve and carries out waste heat recycling.
Embodiment two:
A kind of application method of exhaust afterheat utilization system based on marine low-pressure SCR, specific steps are also disclosed in the application
It is as follows:
Low temperature heat-conducting medium is passed through in step 1. cryogenic piping, low temperature heat-conducting medium is by heat exchange unit and heat exchange unit
High-temp waste gas heat exchange after become high-temperature medium；
Step 2. system for detecting temperature detects the temperature in SCR reactor, and is situated between to the high temperature after testing result and heat exchange
The temperature of matter is compared；
If step 3. diesel engine is operating condition at this time, high-temperature medium is transported to heating module, heated mould through solenoid valve
It is transported to SCR reactor after block heating, SCR reactor is heated；
If diesel engine is standby operating conditions, temperature of the system for detecting temperature to the high-temperature medium after SCR reactor and heat exchange at this time
Degree is compared, and when the temperature in SCR reactor is lower than the temperature of high-temperature medium, high-temperature medium is delivered directly to through solenoid valve
SCR inside reactor heats SCR reactor；It is high when the temperature in SCR reactor is higher than the temperature of high-temperature medium
Warm medium conveying keeps the temperature SCR reactor in the external pipe to the setting of SCR reactor.
Heat-conducting medium is preferably conduction oil in the application, and conduction oil is a kind of heat transfer medium that thermal stability is good, according to ship
The different of type can also replace different media, such as seawater, fresh water etc. with the change of ship type.By conduction oil to exhaust pipe
Cooling has a homogeneous heating, temperature adjustment precise control, and heat-transfer effect is good and energy-efficient advantage, rapid cooling of the realization to exhaust pipe
It is cooled down with stablizing.And most thermal energy can be saved so that reactor is kept the temperature or added within the subsequent time
Heat.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (5)
1. the exhaust afterheat utilization system based on marine low-pressure SCR, which is characterized in that including what is connect with system for detecting temperature
The gas outlet of SCR reactor, the SCR reactor is connected to heat exchange unit, the heat exchange unit heat exchange import and cryogenic piping
Connection, heat exchange unit outlet are connected to reversal valve, the reversal valve wherein outlet SCR reactor all the way, reversal valve
Another way outlet heating module, the heating module are connected to SCR reactor；Thermally conductive Jie of low temperature is passed through in cryogenic piping
Matter, low temperature heat-conducting medium after heat exchange unit exchanges heat become high temperature heat conducting medium, through reversal valve be transported to SCR reactor carry out more than
Recuperation of heat.
2. the exhaust afterheat utilization system as described in claim 1 based on marine low-pressure SCR, which is characterized in that the SCR is anti-
It answers and check valve is set between device and heating module.
3. the exhaust afterheat utilization system as claimed in claim 2 based on marine low-pressure SCR, which is characterized in that the commutation
Valve is two position, three-way electromagnetic change valve.
4. the exhaust afterheat utilization system as claimed in claim 3 based on marine low-pressure SCR, which is characterized in that the electromagnetism
Reversal valve is single electric control structure.
5. the exhaust afterheat utilization system as described in claim 1 based on marine low-pressure SCR, which is characterized in that described thermally conductive
Medium is conduction oil or seawater or fresh water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821189446.3U CN208564704U (en) | 2018-07-25 | 2018-07-25 | Exhaust afterheat utilization system based on marine low-pressure SCR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821189446.3U CN208564704U (en) | 2018-07-25 | 2018-07-25 | Exhaust afterheat utilization system based on marine low-pressure SCR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208564704U true CN208564704U (en) | 2019-03-01 |
Family
ID=65447995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821189446.3U Active CN208564704U (en) | 2018-07-25 | 2018-07-25 | Exhaust afterheat utilization system based on marine low-pressure SCR |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208564704U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843431A (en) * | 2018-07-25 | 2018-11-20 | 中国船舶重工集团柴油机有限公司 | Exhaust afterheat utilization system and method based on marine low-pressure SCR |
-
2018
- 2018-07-25 CN CN201821189446.3U patent/CN208564704U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843431A (en) * | 2018-07-25 | 2018-11-20 | 中国船舶重工集团柴油机有限公司 | Exhaust afterheat utilization system and method based on marine low-pressure SCR |
| CN108843431B (en) * | 2018-07-25 | 2023-08-18 | 中船发动机有限公司 | Exhaust waste heat utilization system and method based on marine low-voltage SCR |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112678139A (en) | Ship cabin heating system using fuel cell heat dissipation water as heat source | |
| CN208564704U (en) | Exhaust afterheat utilization system based on marine low-pressure SCR | |
| CN206903782U (en) | A kind of engine low load inlet manifold temperature lifting system | |
| CN206694081U (en) | A kind of heat regenerative system for thermal power plant | |
| CN108843431A (en) | Exhaust afterheat utilization system and method based on marine low-pressure SCR | |
| CN203258723U (en) | Ship waste-heat utilization heating device | |
| CN207647577U (en) | A kind of diesel engine SCR urea exhaust gas heat pipe heat of evaporation solution system | |
| CN203515743U (en) | Urea pump water heating device for aftertreatment of engine tail gas | |
| CN202692728U (en) | Waste heat utilization system of calcination furnace | |
| CN202993717U (en) | Cold storage condensing heat recovery system | |
| CN202171276U (en) | Stepped heat exchange system of a centralized heat-supply primary heat network according to different heating methods | |
| CN215595718U (en) | Thermal management system applied to vehicle | |
| CN206590906U (en) | A kind of polycrystalline silicon reduction furnace cooling device | |
| CN202366608U (en) | Ammonia recovery device | |
| CN215063963U (en) | Electrophoresis drying furnace flue gas waste heat recovery device | |
| CN112081690B (en) | Methanol engine waste heat recovery hydrogen production device and hydrogen production method thereof | |
| CN208534584U (en) | CHP cogeneration unit | |
| CN112727633A (en) | Container ship and host machine air cooler cooling water waste heat recovery system and waste heat recovery device | |
| CN209840253U (en) | Heat pump system for power plant waste heat cold and hot coupling utilization | |
| CN209510481U (en) | A kind of heat recovery system of marine engine cooling system | |
| CN219754633U (en) | Recycling device for exhaust waste heat of bench engine | |
| CN215949632U (en) | Waste heat recovery system for natural gas engine and vehicle | |
| CN212614915U (en) | Unit exhaust steam waste heat concrete storage system | |
| CN201268591Y (en) | Apparatus for producing low-temperature waste heat preheating desalted water by using sulfuric acid | |
| CN211008821U (en) | Heat tracing device for marine SCR system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266520 No. 501 Lijiang East Road, Huangdao District, Qingdao, Shandong Patentee after: China Shipbuilding Industry Corporation Diesel ENGINE Co.,Ltd. Address before: 266520 No. 501 Lijiang East Road, Huangdao District, Qingdao, Shandong Patentee before: CHINA SHIPBUILDING INDUSTRY CORPORATION DIESEL ENGINE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |