CN108487974A - More temperature range complex halide ammonia storage tank structures with temperature range adaptation function - Google Patents
More temperature range complex halide ammonia storage tank structures with temperature range adaptation function Download PDFInfo
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- CN108487974A CN108487974A CN201810236718.9A CN201810236718A CN108487974A CN 108487974 A CN108487974 A CN 108487974A CN 201810236718 A CN201810236718 A CN 201810236718A CN 108487974 A CN108487974 A CN 108487974A
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- flue gas
- temperature range
- ammonia
- storage tank
- unit pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas After Treatment (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention provides a kind of more temperature range complex halide ammonia storage tank structures with temperature range adaptation function, including ammonia storage tank and exhaust gases passes；Ammonia storage tank includes tank body shell (15) and unit pipes, and one or more unit pipes are threaded through in the inner space of tank body shell (15)；Exhaust gases passes include sequentially connected smoke inlet pipelines (1), flue gas main pipeline Upstream section (2), flue gas bypass duct (19), flue gas main pipeline tract (9), exhanst gas outlet pipeline (10)；Flue gas bypass duct (19) is threaded through in unit pipes, and flue gas bypass duct (19) is corresponded with unit pipes；Adsorbent (11) is filled in space between unit pipes and flue gas bypass duct (19).The present invention stores ammonia using solid absorbent, spray nozzle clogging, crystallization, the ice formation issues for avoiding conventional urea solution storage ammonia from generating, the problems of energy consumption for desorbing and avoiding traditional ammonia storage tank electrical heating, circulation of fluid heating based on ammonia is driven with fume afterheat, improves utilization rate of complementary energy.
Description
Technical field
The present invention relates to vehicle maintenance service and adsorption technology fields, and in particular, to one kind having the adaptive work(of temperature range
More temperature range complex halide ammonia storage tank structures of energy.
Background technology
Nitrogen oxides is a kind of toxic gas having huge injury effect to human body, meanwhile, it is to form acid rain, photochemistry dirt
Contaminate and destroy the environmental contaminants of ozone layer structure.Large diesel engine automobile is the main emission source of nitrogen oxides, for the mankind
Sustainable development, cope with the challenge of energy and environment, solve the problems, such as that motor vehicle exhaust emission is very urgent.Vehicle maintenance service system
In system, reducing agent of the ammonia as nitrogen oxides, storage, supply problem are increasingly paid attention to by researcher.
Currently, ammonia is as the primary raw material and protective gas in industrial processes, triformed storage ammonia altogether
Jar structure.The first, ammonia is converted to liquefied ammonia using high pressure, is needed to dispose in specific storage condition, is not suitable as
Vehicle-mounted ammonia storage tank comes into operation.[bibliography：Liquefied ammonia storage [J] compared with the technological design of gasification in the beautiful .SCR denitrations of Liu Xin
Chinese science and technology is read extensively, 2013 (19):335-335.].Second, using 32.5% high purity urea aqueous solution, pass through atomization
Discharge ammonia.[bibliography：Zhou Yinggui, gold protect modeling and analog study [J] of Noboru aqueous solution of urea atomization thermal decomposition characteristic
Proceedings of the CSEE, 2012,32 (26):37-42.].Urea chemical property is active, and stability is poor, meanwhile, urea is water-soluble
Liquid atomization process, be easy to cause spray nozzle clogging, and crystallization, icing phenomenon are unsatisfactory for the vehicle-mounted economy used and stability requirement.
The third, uses the solid absorption medium based on solid-state ammonium salt to adsorb ammonia, forms stable complex compound, be stored in ammonia storage tank
In, by heating, adsorbing medium desorbs ammonia, provides the reducing agent needed for exhaust treatment system.[bibliography：Spread that account for ability solid
State ammonium SCR system ammonia gas supplying device design and development [D] Jilin University, 2016.].Solid-state ammonium salt is divided into according to desorption temperature
Low temperature salt, middle thermohaline, high temperature salt are less than the temperature requirement of urea ammonia storage tank release ammonia, meanwhile, same volume score is provided
Ammonia, the occupied space of solid-state ammonium salt ammonia storage tank are less than the one third in space occupied by urea ammonia storage tank, also have cost
The advantages that cheap, safe and reliable, therefore solid-state ammonium salt replaces conventional urea solution to be widely used as storage ammonia carrier.
German FEV companies develop solid-state SCR technology, and hot fluid medium is sprayed onto solid state reduction agent surface by pumping, Gu
Body adsorbing medium is produced ammonia by thermal decomposition, and the hot fluid medium for completing heat transfer is withdrawn into phase again after flowing to bottom
In the storage container answered, a dynamic equilibrium is formd.[bibliography：Lacin F,Kotrba A,Hayworth G,et
al.SOLIDDemonstrating an improved approach to NOxreduction via a solid
reductant[J].Sae Technical Papers,2011.].Korea Machinery Materials Research Laboratories are developed cooperatively with Han Nan universities
The mode of heating of solid-state SCR system, ammonia gas generating device is electrical heating, and solid state reduction agent is generated ammonia by thermal decomposition, and electricity adds
Hot part is mounted on outside storage container, and the control [bibliography of ammonia production quantity is realized by changing heating amount：Kim H,
Lee H,Yoon C S,et al.AFeasibility Study on the Solid Ammonium SCR System for
Control of Diesel NOx Emissions[J].Korea Autonomous Engineer Autumn
Conference&Exhibition,2014,1.].Patent document CN206338100U provides a kind of ammonia storage tank electrical heating dress
It sets, being in direct contact adsorbent mode by electric heater unit is heated, and heating device is easily corroded.Meanwhile the device uses
" solid particulate matter " represents storage ammoniacal substance, without reference to the analysis to running conditions of vehicle adaptability.Therefore, traditional ammonia storage tank is deposited
In the great number of issues such as mode of heating is single, heat and mass effect is poor, ammonia rate of release is slow, does not analyze and passed using multiple ammonias
The influence that matter channel and the compound storage ammonia of low high temperature salt discharge ammonia, circulate, collecting, how to improve ammonia storage tank performance is urgently
Problem to be solved.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of more temperature ranges with temperature range adaptation function
Complex halide ammonia storage tank structure.
According to more temperature range complex halide ammonia storage tank structures provided by the invention with temperature range adaptation function, including storage
Ammonia tank and exhaust gases passes；The ammonia storage tank includes tank body shell and unit pipes, and one or more unit pipes are threaded through tank body
In the inner space of shell；
Exhaust gases passes include sequentially connected smoke inlet pipelines, flue gas main pipeline Upstream section, flue gas bypass duct, flue gas master
Pipe downstream section, exhanst gas outlet pipeline；
Flue gas bypass duct is threaded through in unit pipes, and flue gas bypass duct is corresponded with unit pipes；Unit pipes and flue gas branch
Adsorbent is filled in space between pipe, the adsorbent being capable of adsorption and desorption ammonia.
Preferably, the ammonia storage tank also include second end cover and first end cover, exhaust gases passes on flow of flue gas direction according to
It is secondary to run through second end cover, first end cover；
It is fastenedly connected with a flange in first end cover, ammonia outlet pipeline is provided on the flange；
Preferably, along unit pipes axial direction：
Unit pipes are contacted with second end cover, and there are gaps between unit pipes and first end cover；
Flue gas bypass duct sequentially passes through second end cover, tank body shell, first end cover, flange.
Preferably, the tank body housing cross-sectional shape is round or rectangle；
Multiple unit pipes are arranged in by the way of in-line arrangement or insert row in the inner space of tank body shell；
The flue gas bypass duct includes following any or various structures：Straight tube；Corrugated pipes；Helix tube；Finned tube.
Preferably, the unit pipes include unit tube wall and mass transfer structure, in the projection of cross section, multiple mass transfers
Structure is along the internal face that unit pipes circumferential direction is arranged in unit tube wall；
Mass transfer channel is provided in mass transfer structure, it is logical that the space between mass transfer structure and unit tube wall forms ammonia release
Road, the ammonia that the adsorbent desorbs reach ammonia release channel after passing through mass transfer channel.
Preferably, the unit tube wall is made of stainless steel material, and the mass transfer structure is by metal material or nanometer material
Material is made；
The adsorbent includes using expanded graphite as the alkali metal halide of matrix or to vulcanize expanded graphite as matrix
Alkali metal halide.
Preferably, also include flue gas safety corridor, the both ends of flue gas safety corridor along its length respectively with smoke inlet
Pipeline, the connection of exhanst gas outlet pipeline；
Hereinafter valve is provided on any one or multiple positions：
-- in flue gas bypass duct；
-- on flue gas main pipeline tract；
-- on flue gas safety corridor.
It is provided with temperature sensor and flow sensor in the smoke inlet pipelines；Ammonia storage tank is internally provided with pressure biography
Sensor and temperature sensor.
Preferably, also include heating device, the heating device includes that head and the tail are closed the power supply connected, relay and add
The torrid zone；
The heating tape is mounted on any of multiple unit pipes or appoints in multiple unit pipes.
Preferably, also include electronic control unit；The valve, temperature sensor, flow sensor, pressure sensor with
And relay is connect with electronic control unit；
The electronic control unit includes with lower module：
Signal acquisition module：Obtain the detection signal from temperature sensor, flow sensor and pressure sensor：
Action command generation module：Action directive is generated according to detection signal, the action directive can be controlled
Valve processed is acted with relay.
Preferably, at least there are three unit pipes for filling different adsorbents in multiple unit pipes.
Compared with prior art, the present invention has following advantageous effect：
1, the present invention stores ammonia using solid absorbent, avoids spray nozzle clogging, the knot of the storage ammonia generation of conventional urea solution
Brilliant, ice formation issues.
2, the present invention is driven with fume afterheat desorbs based on ammonia, avoids traditional ammonia storage tank electrical heating, circulation of fluid heating
Problems of energy consumption, improve utilization rate of complementary energy.
3, the present invention desorbs ammonia using electric heater unit auxiliary drive, and ammonia storage tank discharges when quickly meeting vehicle cold-start
Temperature, pressure condition needed for ammonia.
4, the present invention use multi-cell tube structure, heated by flue gas shunting, avoid one-pipe heating cause adsorbate by
Hot uneven problem, improves heat transfer efficiency.
5, the present invention increases the contact surface between flue gas and adsorbing medium using undaform pipeline as inside smoke pipeline
Product so that adsorbing medium is heated evenly, and improves the heat transfer effect of unit pipes；
6, the present invention uses multiple ammonia mass transfer channels, ammonia release channel, relatively traditional unique ammonia of ammonia storage tank to go out
Mouth pipeline, accelerates the circulation of ammonia, collects, and improves mass-transfer efficiency.
7, present invention installation pressure sensor, temperature sensor, flowmeter, valve, real-time monitoring system working condition are adjusted
Whole ammonia desorption quantity.
8, the present invention uses the compound storage ammonia structure of basic, normal, high thermohaline, adjusts working condition according to running conditions of vehicle, carries
High ammonia rate of release, utilization rate of complementary energy rationally increase storage ammonia amount.
9, the configuration of the present invention is simple, compact, of low cost, operating temperature range is big, environmental suitability is strong, Neng Gouguang
It is general to be applied in vehicle maintenance service field.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is that ammonia storage tank tank body shell uses cross section for circular tube structure schematic diagram；
Fig. 2 is that ammonia storage tank tank body shell uses cross section for rectangular cylinder structural schematic diagram；
Fig. 3 is overall structure of the present invention；
Fig. 4 is unit pipes cross-sectional structure schematic diagram.
It is shown in figure：
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
In the description of the present invention, it is to be understood that, term "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on ... shown in the drawings or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, device is not indicated or implied the indicated or element is necessary
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
As shown in figure 3, more temperature range complex halide ammonia storage tank structures provided by the invention with temperature range adaptation function,
Including ammonia storage tank and exhaust gases passes.The ammonia storage tank includes tank body shell 15 and unit pipes, and one or more unit pipes are worn
It is located in the inner space of tank body shell 15, as shown in Figure 1 and Figure 2, it is circle that cross section, which can be used, in the tank body shell 15 of ammonia storage tank
Or square cylinder structure, internal element pipe quantity can be adjusted as needed, and using in-line arrangement or the arrangement mode of insert row, embodiment
In use the structure of in-line arrangement 2 × 2, certainly in preference, quantity and the arrangement mode of unit pipes can carry out as needed
Unordered arrangement is can also be between arbitrary combination or even the unit pipes.
Exhaust gases passes include sequentially connected smoke inlet pipelines 1, flue gas main pipeline Upstream section 2, flue gas bypass duct 19, cigarette
Gas main pipeline tract 9, exhanst gas outlet pipeline 10, flue gas bypass duct 19 are threaded through in unit pipes, flue gas bypass duct 19 and unit
Pipe corresponds.Adsorbent 11 is filled in space between unit pipes and flue gas bypass duct 19, the adsorbent 11 can be inhaled
Attached and desorption ammonia, as shown in figure 4, what is formed among adsorbent 11 walks space residing for tube passage 20 i.e. flue gas bypass duct 19.By
The flue gas of vehicle exhaust exit passageway discharge is further separated into flue gas bypass duct 19 by smoke inlet channel, heats adsorbent
11, it is finally discharged via exhanst gas outlet pipeline, into tail gas reduction apparatus；In heat exchanging process, adsorbing medium desorption release ammonia
Gas is discharged by ammonia outlet pipeline 8, also enters in tail gas reduction apparatus, react with flue gas.Preferably, the tank
15 cross-sectional shape of body shell body can also be the other shapes such as oval, petal.Preferably, it can be coated in ammonia storage tank
The thermal insulation materials such as filled and process, to reduce the loss of heat.Preferably, the flue gas bypass duct 19 includes following any or appoints
Various structures：Straight tube；Corrugated pipes；Helix tube；Finned tube.
The ammonia storage tank also includes second end cover 16 and first end cover 6, and exhaust gases passes pass through successively on flow of flue gas direction
Second end cover 16, first end cover 6 are worn, a flange 7 is fastenedly connected in first end cover 6, ammonia outlet is provided on the flange 7
Pipeline 8.Preferably, along unit pipes axial direction, exist such as the arrangement in lower structure：Unit pipes are contacted with second end cover 16,
There are gaps between unit pipes and first end cover 6；Flue gas bypass duct 19 sequentially passes through second end cover 16, tank body shell 15, first
End cap 6, flange 7.
As shown in figure 4, the unit pipes include unit tube wall 14 and mass transfer structure 12, it is multiple in the projection of cross section
The mass transfer structure 12 is provided with along the internal face that unit pipes circumferential direction is arranged in unit tube wall 14 in mass transfer structure 12
Mass transfer channel, the space between mass transfer structure 12 and unit tube wall 14 form ammonia release channel 13, and the adsorbent 11 solves
The ammonia of suction reaches ammonia release channel 13 after passing through mass transfer channel.Preferably, in the projection of cross section, the mass transfer structure
12 be arc.Preferably, the unit tube wall 14 is made of stainless steel material, and the mass transfer structure 12 is by metal material or receives
Rice material is made；The adsorbent 11 includes to be using expanded graphite as the alkali metal halide of matrix or to vulcanize expanded graphite
The alkali metal halide of matrix.Preferably, at least there are three unit pipes for filling different adsorbents 11 in multiple unit pipes.
Such as：In the first root unit pipe filling low temperature salt adsorbent 11, such as：NaBr composite sulfuration expanded graphites etc.；In the second root unit
Thermohaline adsorbent 11 in being filled in pipe, such as：CaCl2Composite sulfuration expanded graphite etc.；The filled high-temperature salt in third root unit pipe
Adsorbent 11, such as：MnCl2Composite sulfuration expanded graphite etc..
As shown in figure 3, in embodiment, it is additionally provided with flue gas safety corridor 17 in the present invention, flue gas safety corridor 17 is along length
The both ends in degree direction are connected to smoke inlet pipelines 1, exhanst gas outlet pipeline 10 respectively.It is set on any one or multiple positions below
It is equipped with valve：Flue gas bypass duct 19 is along its length close to one end of smoke inlet pipelines 1 in both ends；Flue gas main pipeline tract
On 9；Flue gas safety corridor 17 is along its length close to one end of smoke inlet pipelines 1 in both ends；Flue gas safety corridor 17 is along length
It spends in the both ends of direction close to one end of exhanst gas outlet pipeline 10.Temperature sensor and stream are provided in the smoke inlet pipelines 1
Quantity sensor 21；Ammonia storage tank is internally provided with pressure sensor and temperature sensor.It is additionally provided with heating device, the heating dress
Power supply 3, relay 4 and the heating tape 18 that connection is closed comprising head and the tail are set, the heating tape 18 is mounted in multiple unit pipes
Either one or two of or appoint multiple unit pipes on.In addition, being additionally provided with electronic control unit 5；The valve, temperature sensor, flow
Sensor 21, pressure sensor and relay 4 are connect with electronic control unit 5, and the electronic control unit 5 includes following
Module：Signal acquisition module：Obtain the detection signal from temperature sensor, flow sensor 21 and pressure sensor：It is dynamic
Make directive generation module：According to detection signal generate action directive, the action directive can control valve with after
Electric appliance 4 is acted.Preferably, warning device can also be connected inside ammonia storage tank, when ammonia storage tank pressure reaches critical value, started
Warning device, to ensure to replace ammonia storage tank, treatment system for tail gas of automobile normal operation in time.
Preferred embodiment：
As shown in figure 3, including first unit pipe 101, second unit pipe 102, third unit pipe 103 in multiple unit pipes
And the 4th unit pipes 104.Divide in first unit pipe 101, second unit pipe 102, third unit pipe 103, the 4th unit pipes 104
It is not correspondingly arranged on the first flue gas bypass duct, the second flue gas bypass duct, third flue gas bypass duct, the 4th flue gas bypass duct；First
Flue gas bypass duct, third flue gas bypass duct, is respectively arranged with valve V2, valve in the 4th flue gas bypass duct at the second flue gas bypass duct
Door V3, valve V4, valve V5；Flue gas safety corridor 17 is along its length close to one end of smoke inlet pipelines 1, close in both ends
Valve V1, valve V7 are respectively arranged on one end of exhanst gas outlet pipeline 10；It is provided with valve on flue gas main pipeline tract 9
V6.The heating tape 18 is mounted on first unit pipe 101.Be provided in the smoke inlet pipelines 1 temperature sensor T1 with
Flow sensor 21；Ammonia storage tank is internally provided with pressure sensor P and temperature sensor T2.
The pressure limit that ammonia storage tank stablizes release ammonia is 0.15~0.7MPa, first unit pipe 101, second unit pipe
102 filling low temperature salt NaBr composite sulfuration expanded graphites, desorption temperature are not less than 40 DEG C, thermohaline during third unit pipe 103 is filled
CaCl2Composite sulfuration expanded graphite, desorption temperature are not less than 70 DEG C, 104 filled high-temperature salt MnCl of the 4th unit pipes2Composite sulfuration
Expanded graphite, desorption temperature are not less than 120 DEG C.Certainly in preference, can according to vehicle model, operating mode adjust filling it is low,
The quantity of middle and high thermohaline corresponding unit pipe.
When a vehicle is started or ammonia storage tank pressure is too small, electric signal is exported by electronic control component, opens relay 4
Switch and valve V2, valve V6.Low temperature salt NaBr desorptions release ammonia in first unit pipe 101 is driven based on electric heater unit
Gas, meanwhile, the flue gas being discharged by vehicle exhaust exit passageway enters by smoke inlet pipelines 1, flue gas main pipeline Upstream section 2
First flue gas bypass duct drives low temperature salt NaBr desorptions release ammonia in first unit pipe 101, and flue gas is via under flue gas main pipeline
Section 9, the discharge of exhanst gas outlet pipeline 10 are swum, into tail gas reduction apparatus.The ammonia for desorbing release flows into ammonia by mass transfer channel
Gas release channel 13 is discharged via ammonia outlet pipeline 8, enters in tail gas reduction apparatus.When pressure reaches simultaneously in ammonia storage tank
Stablize within the scope of 0.15~0.7MPa, valve V2, valve V6, relay 4 are closed by automatically controlled signal.
When flue-gas temperature is no more than 200 DEG C, usual vehicle motor passes through electronics control with the slow-speed of revolution or underrun
Element processed exports electric signal, Open valve V3, valve V6.The flue gas being discharged by vehicle exhaust exit passageway, by smoke inlet
Pipeline 1, flue gas main pipeline Upstream section 2, into the second flue gas bypass duct, fume afterheat drives low temperature salt in second unit pipe 102
NaBr desorption release ammonias, flue gas is discharged via flue gas main pipeline tract 9, exhanst gas outlet pipeline 10, also original-pack into tail gas
It sets.The ammonia for desorbing release flows into ammonia release channel 13 by mass transfer channel, is discharged via ammonia outlet pipeline 8, enters
Into tail gas reduction apparatus.When flue-gas temperature is more than 200 DEG C, valve V3, valve V6 are closed by automatically controlled signal.
When flue-gas temperature is more than 200 DEG C and is no more than 350 DEG C, usual vehicle motor is with middle rotating speed or middle load operation
Operation exports electric signal, Open valve V4, valve V6 by electronic control component.The cigarette being discharged by vehicle exhaust exit passageway
Gas drives into third flue gas bypass duct in third unit pipe 103 by smoke inlet pipelines 1, flue gas main pipeline Upstream section 2
Middle thermohaline CaCl2Desorption release ammonia, flue gas is discharged via flue gas main pipeline tract 9, exhanst gas outlet pipeline 10, into tail gas
In reduction apparatus.The ammonia for desorbing release flows into ammonia release channel 13, via 8 row of ammonia outlet pipeline by mass transfer channel
Go out, into tail gas reduction apparatus.When flue-gas temperature is less than 200 DEG C or more than 350 DEG C, valve is closed by automatically controlled signal
V4, valve V6.
When flue-gas temperature is more than 350 DEG C, usual vehicle motor passes through electronic control with high rotating speed or heavy-duty service
Element exports electric signal, Open valve V5, valve V6.The flue gas being discharged by vehicle exhaust exit passageway, by smoke inlet pipe
Road 1, flue gas main pipeline Upstream section 2, into the 4th flue gas bypass duct, fume afterheat drives high temperature salt MnCl2Desorption release ammonia,
Flue gas is discharged via flue gas main pipeline tract 9, exhanst gas outlet pipeline 10, into tail gas reduction apparatus.Desorb the ammonia of release
Gas flows into ammonia release channel 13 by mass transfer channel, is discharged via ammonia outlet pipeline 8, into tail gas reduction apparatus.
When flue-gas temperature is no more than 350 DEG C, valve V5, valve V6 are closed by automatically controlled signal.
When pressure is more than 0.7MPa in ammonia storage tank, passes through electronic control component and export electric signal, Open valve V1, valve
V7, extra flue gas pass through smoke inlet pipelines 1, and flue gas safety corridor 17 is discharged via exhanst gas outlet pipeline 10 and discharges, until storage
Ammonia pressure inside the tank reaches and stablizes within the scope of 0.15~0.7MPa, closes valve V1, valve V7.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (10)
1. a kind of more temperature range complex halide ammonia storage tank structures with temperature range adaptation function, which is characterized in that include storage ammonia
Tank and exhaust gases passes；The ammonia storage tank includes tank body shell (15) and unit pipes, and one or more unit pipes are threaded through tank
In the inner space of body shell body (15)；
Exhaust gases passes include sequentially connected smoke inlet pipelines (1), flue gas main pipeline Upstream section (2), flue gas bypass duct (19),
Flue gas main pipeline tract (9), exhanst gas outlet pipeline (10)；
Flue gas bypass duct (19) is threaded through in unit pipes, and flue gas bypass duct (19) is corresponded with unit pipes；Unit pipes and flue gas
Adsorbent (11) is filled in space between bypass duct (19), the adsorbent (11) being capable of adsorption and desorption ammonia.
2. more temperature range complex halide ammonia storage tank structures according to claim 1 with temperature range adaptation function, special
Sign is, the ammonia storage tank also includes second end cover (16) and first end cover (6), exhaust gases passes on flow of flue gas direction successively
Through second end cover (16), first end cover (6)；
It is fastenedly connected with a flange (7) in first end cover (6), ammonia outlet pipeline (8) is provided on the flange (7).
3. more temperature range complex halide ammonia storage tank structures according to claim 2 with temperature range adaptation function, special
Sign is, along unit pipes axial direction：
Unit pipes are contacted with second end cover (16), and there are gaps between unit pipes and first end cover (6)；
Flue gas bypass duct (19) sequentially passes through second end cover (16), tank body shell (15), first end cover (6), flange (7).
4. more temperature range complex halide ammonia storage tank structures according to claim 1 with temperature range adaptation function, special
Sign is that tank body shell (15) cross-sectional shape is round or rectangle；
Multiple unit pipes are arranged in by the way of in-line arrangement or insert row in the inner space of tank body shell (15)；
The flue gas bypass duct (19) includes following any or various structures：Straight tube；Corrugated pipes；Helix tube；Finned tube.
5. more temperature range complex halide ammonia storage tank structures according to claim 1 with temperature range adaptation function, special
Sign is that the unit pipes include unit tube wall (14) and mass transfer structure (12), in the projection of cross section, multiple mass transfers
Structure (12) is along the internal face that unit pipes circumferential direction is arranged in unit tube wall (14)；
Mass transfer channel is provided in mass transfer structure (12), the space between mass transfer structure (12) and unit tube wall (14) forms ammonia
Gas release channel (13), the ammonia that the adsorbent (11) desorbs reach ammonia release channel (13) after passing through mass transfer channel.
6. more temperature range complex halide ammonia storage tank structures according to claim 5 with temperature range adaptation function, special
Sign is that the unit tube wall (14) is made of stainless steel material, and the mass transfer structure (12) is by metal material or nanometer material
Material is made；
The adsorbent (11) includes using expanded graphite as the alkali metal halide of matrix or to vulcanize expanded graphite as matrix
Alkali metal halide.
7. more temperature range complex halide ammonia storage tank structures according to claim 1 with temperature range adaptation function, special
Sign is, also includes flue gas safety corridor (17), the both ends of flue gas safety corridor (17) along its length respectively with smoke inlet
Pipeline (1), exhanst gas outlet pipeline (10) connection；
Hereinafter valve is provided on any one or multiple positions：
-- in flue gas bypass duct (19)；
-- on flue gas main pipeline tract (9)；
-- on flue gas safety corridor (17).
It is provided with temperature sensor and flow sensor on the smoke inlet pipelines (1)；Ammonia storage tank is internally provided with pressure biography
Sensor and temperature sensor.
8. more temperature range complex halide ammonia storage tank structures according to claim 7 with temperature range adaptation function, special
Sign is, also includes heating device, and the heating device includes the power supply (3), relay (4) and heating that head and the tail are closed connection
Band (18)；
The heating tape (18) is mounted on any of multiple unit pipes or appoints in multiple unit pipes.
9. more temperature range complex halide ammonia storage tank structures according to claim 8 with temperature range adaptation function, special
Sign is, also includes electronic control unit (5)；The valve, temperature sensor, flow sensor, pressure sensor and after
Electric appliance (4) is connect with electronic control unit (5)；
The electronic control unit (5) includes with lower module：
Signal acquisition module：Obtain the detection signal from temperature sensor, flow sensor (21) and pressure sensor：
Action command generation module：Action directive is generated according to detection signal, the action directive being capable of control valve
Door is acted with relay (4).
10. more temperature range complex halide ammonia storage tank structures according to claim 1 with temperature range adaptation function, special
Sign is at least there are three unit pipes for filling different adsorbents (11) in multiple unit pipes.
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Cited By (1)
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|---|---|---|---|---|
| CN111569645A (en) * | 2020-05-13 | 2020-08-25 | 上海交通大学 | Multi-stage ammonia storage type solid ammonia NOx removal system |
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| CN108487974B (en) | 2020-02-21 |
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