CN109589791A - A kind of internal combustion engine nitrogen oxides control system and its working method efficiently without secondary pollution - Google Patents
A kind of internal combustion engine nitrogen oxides control system and its working method efficiently without secondary pollution Download PDFInfo
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- CN109589791A CN109589791A CN201811544687.XA CN201811544687A CN109589791A CN 109589791 A CN109589791 A CN 109589791A CN 201811544687 A CN201811544687 A CN 201811544687A CN 109589791 A CN109589791 A CN 109589791A
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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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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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
- B01D53/346—Controlling the process
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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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/202—Hydrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/21—Organic compounds not provided for in groups B01D2251/206 or B01D2251/208
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2255/10—Noble metals or compounds thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
- B01D2255/2092—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The present invention relates to a kind of internal combustion engine nitrogen oxides control systems and its working method efficiently without secondary pollution, using Ag/Al2O3As denitrating catalyst, nuisanceless environmental-friendly ethyl alcohol (C is chosen2H5- OH) it is that reducing agent carries out the denitration of internal combustion unit, take one to bypass into catalyst on reducing agent service, ethyl alcohol cracking generates H2, while gas bypass is taken in internal combustion engine outlet, temperature needed for providing reaction using the heat of flue gas.After membrane separator separates, H2Into in Benitration reactor, denitration efficiency can be significantly improved while expanding the warm window of reaction.Ethyl alcohol of the present invention can be used as reducing agent for denitration reaction, can generate hydrogen with self-cleavage, improve denitration efficiency, while taking full advantage of the waste heat of flue gas, improve the efficiency of system, reduce discharge.
Description
Technical field
The present invention relates to internal combustion engine energy source station denitrating flue gas fields, more particularly to are suitable for gas internal-combustion engine height smoke evacuation temperature
The SCR gas denitrifying technology of degree.
Background technique
Internal combustion engine drives electrical power generators using natural gas or fuel oil as fuel, by burning, generates high-grade electric energy, stablizes
Postrun smoke evacuation exhaust temperature is generally at 400 DEG C or more (normal operating temperature is at 450 DEG C or so), and internal combustion engine cylinder jacket water
At 90 DEG C or more, to make full use of the flue gas of engine exhaust and the temperature of jacket water, cigarette is generally arranged in temperature after internal combustion engine
Gas hot water lithium bromide unit realizes summer system using the heat of high-temperature flue gas and jacket water as the heat source of lithium bromide chiller
Cold and winter heating.
Since combustion in IC engine uses piston compression ignition mode, unit itself can not achieve low nitrogen burning, lead to tail gas of discharging fume
Middle NOxDischarge quality concentration is higher, generally in 200mg/m3More than, remote super Air Pollutant Emission requirement.Atmosphere pollution increasingly
Under serious form, reduces Air Pollutant Emission mass concentration and broken in the eyebrows and eyelashes, and NOxDischarge is in Air Pollutant Emission
One important index, so, reduce internal combustion engine NOxDischarge quality concentration also will be combined supply system based on internal combustion engine
One important content.
Selective catalytic reduction (SCR) is current domestic denitration mainstream technology, principle be under the effect of the catalyst,
With NH3For reducing agent, at high temperature selectively with the NO in flue gasxReaction generates nontoxic, free of contamination nitrogen and water, is
Meet the high exhaust gas temperature of internal combustion engine, internal combustion engine generally uses high temperature molecular sieve catalyst, however high temperature molecular sieve catalyst price
Valuableness, and reducing agent NH3The problem of easily causing secondary pollution.
Novel HC-SCR catalyst is currently used for diesel engine NOxIn removing, such as Patent No. 200910226179.1
Chinese patent, the catalyst used is Ag/Al2O3Reducing agent, using is HC type organic (such as methanol, ethyl alcohol), when it
Applied in internal combustion engine denitration, temperature window is only 700 ~ 800K, and denitration efficiency is not ideal, research shows that being added
H2It can be improved the denitration efficiency of HC-SCR and can substantially expand its temperature window, however H2Source and supply be to be difficult to solve
The problem of.
With increasingly stringent, the reduction internal combustion engine NO of atmosphere pollutants emission standardsxDischarge quality concentration will be with internal combustion
One important content of the combined supply system based on machine, novel HC-SCR catalytic reduction technique using non-harmful alcohols material as
Reducing agent and be applied, however its denitration efficiency further increase and the expansion of temperature window is limited by H2, and H2?
Source and storage are current also more difficult, therefore the present invention proposes that one kind flexibly produces H2Mode, avoid transport storage the problems such as,
And it is able to ascend running efficiency of system.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of efficiently without secondary pollution
Internal combustion engine nitrogen oxides control system and its working method, obtain H using reducing agent and fume afterheat2, can be good at solving
Certainly H2Source and storage problem.
Technical solution used by the present invention solves the above problems is: a kind of internal combustion engine nitrogen oxidation efficiently without secondary pollution
Object control system, including internal combustion engine, which is characterized in that further include Benitration reactor, lithium bromide chiller, chimney, reducing agent storage
Device and hydrogen-manufacturing reactor；The internal combustion engine is connect with Benitration reactor and hydrogen-manufacturing reactor respectively, and anti-in internal combustion engine and hydrogen manufacturing
It answers and is provided with gas bypass flow control valve between device；The hydrogen-manufacturing reactor is connect with Benitration reactor, and hydrogen-manufacturing reactor
Gaseous jet simulation device is provided between Benitration reactor；The Benitration reactor, lithium bromide chiller and chimney are sequentially connected；Institute
Reducing agent reservoir is stated to connect with Benitration reactor and hydrogen-manufacturing reactor respectively, and reducing agent reservoir and hydrogen-manufacturing reactor it
Between be provided with reducing agent bypass flow control valve, be provided between reducing agent reservoir and Benitration reactor reduction agent flux control
Valve processed；Atomizer, rectifier and Ag/Al are installed in the Benitration reactor2O3Catalyst layer, in the hydrogen-manufacturing reactor
Producing hydrogen, catalyzing oxidant layer is installed.
The working method of the efficient internal combustion engine nitrogen oxides control system without secondary pollution is as follows: high-temperature flue gas from
Discharge in internal combustion engine, most of flue gas enters Benitration reactor to be mixed with the reducing agent that atomizer sprays, after rectified device,
Into Ag/Al2O3Catalyst layer completes denitration reaction, later by lithium bromide chiller and being discharged by chimney, the flow of reducing agent by
The control of reducing agent flow control valve；For improve denitration efficiency, taken in reducing agent reservoir all the way reducing agent enter hydrogen production reaction
Device generates H under the action of producing hydrogen, catalyzing oxidant layer2, temperature and heat needed for process provide by the exiting flue gas of internal combustion engine；
Reduction dosage needed for flue gas flow, hydrogen manufacturing is controlled by gas bypass flow control valve, reducing agent bypass flow control valve respectively,
The reducing agent that atomizer sprays is provided by reducing agent reservoir；Reducing agent cracks the gas of generation through gas in hydrogen-manufacturing reactor
After the separation of body membrane separator, H2And the flue gas after heat release enters Benitration reactor and is reacted.
Furthermore, reducing agent reservoir is selected to the reducing agent that Benitration reactor and hydrogen-manufacturing reactor provide without secondary
Pollute environmental-friendly ethyl alcohol.
Furthermore, the gaseous jet simulation device of hydrogen-manufacturing reactor outlet setting is by H2It is separately separated out.
Compared with prior art, the present invention having the following advantages that and effect:
The present invention uses Ag/Al2O3As denitrating catalyst, nuisanceless environmental-friendly ethyl alcohol (C is chosen2H5- OH) it is reducing agent
The denitration of internal combustion unit is carried out, takes one to bypass into catalyst on reducing agent service, ethyl alcohol cracking generates H2, while inside
Combustion engine outlet takes gas bypass, temperature needed for providing reaction using the heat of flue gas.After membrane separator separates, H2Into de-
In nitre reactor, denitration efficiency can be significantly improved while expanding the warm window of reaction.
Ethyl alcohol of the present invention can be used as reducing agent for denitration reaction, can generate hydrogen with self-cleavage,
Denitration efficiency is improved, while taking full advantage of the waste heat of flue gas, the efficiency of system is improved, reduces discharge.
Structure of the invention design rationally, is arranged easy for installation.H is produced using reducing agent and fume afterheat2, it is easy to be flexible,
Solves H2The problem produced and stored, and improve the overall performance of system, efficiency.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the embodiment of the present invention.
In figure: internal combustion engine 1, gas bypass flow control valve 2, producing hydrogen, catalyzing oxidant layer 3, reducing agent bypass flow control valve 4,
Gaseous jet simulation device 5, reducing agent flow control valve 6, rectifier 7, atomizer 8, Ag/Al2O3Catalyst layer 9, Benitration reactor
10, lithium bromide chiller 11, chimney 12, reducing agent reservoir 13, hydrogen-manufacturing reactor 14.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
Referring to Fig. 1, efficient internal combustion engine nitrogen oxides control system without secondary pollution in the present embodiment, including internal combustion engine
1, it further include Benitration reactor 10, lithium bromide chiller 11, chimney 12, reducing agent reservoir 13 and hydrogen-manufacturing reactor 14；Internal combustion engine 1
It is connect respectively with Benitration reactor 10 and hydrogen-manufacturing reactor 14, and be provided with flue gas between internal combustion engine 1 and hydrogen-manufacturing reactor 14
Bypass flow control valve 2；Hydrogen-manufacturing reactor 14 is connect with Benitration reactor 10, and hydrogen-manufacturing reactor 14 and Benitration reactor 10 it
Between be provided with gaseous jet simulation device 5；Benitration reactor 10, lithium bromide chiller 11 and chimney 12 are sequentially connected；Reducing agent reservoir
13 connect with Benitration reactor 10 and hydrogen-manufacturing reactor 14 respectively, and set between reducing agent reservoir 13 and hydrogen-manufacturing reactor 14
It is equipped with reducing agent bypass flow control valve 4, reduction agent flux is provided between reducing agent reservoir 13 and Benitration reactor 10
Control valve 6；Atomizer 8, rectifier 7 and Ag/Al are installed in Benitration reactor 102O3Catalyst layer 9, hydrogen-manufacturing reactor 14
Producing hydrogen, catalyzing oxidant layer 3 is inside installed.
Efficiently the working method of internal combustion engine nitrogen oxides control system without secondary pollution is as follows: high-temperature flue gas is from internal combustion engine
Discharge in 1, most of flue gas enters Benitration reactor 10 to be mixed with the reducing agent ethyl alcohol that atomizer 8 sprays, rectified device 7 it
Afterwards, into Ag/Al2O3Catalyst layer 9 completes denitration reaction, passes through lithium bromide chiller 11 later and is discharged by chimney 12, reducing agent
Flow controlled by reducing agent flow control valve 6；To improve denitration efficiency, reducing agent second all the way is taken in reducing agent reservoir 13
Alcohol enters hydrogen-manufacturing reactor 14, generates H under the action of producing hydrogen, catalyzing oxidant layer 32, temperature and heat needed for process are by internal combustion
The exiting flue gas of machine 1 provides；Reduction dosage needed for flue gas flow, hydrogen manufacturing is respectively by gas bypass flow control valve 2, reducing agent
Bypass flow control valve 4 controls, and the reducing agent that atomizer 8 sprays is provided by reducing agent reservoir 13；Ethyl alcohol is in hydrogen production reaction
The gas that cracking generates in device 14 is after the separation of gaseous jet simulation device 5, by H2It is separately separated out, H2And the flue gas after heat release into
Enter Benitration reactor 10 to be reacted.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this hair
Bright protection scope.
Claims (4)
1. a kind of internal combustion engine nitrogen oxides control system efficiently without secondary pollution, including internal combustion engine (1), which is characterized in that also
Including Benitration reactor (10), lithium bromide chiller (11), chimney (12), reducing agent reservoir (13) and hydrogen-manufacturing reactor (14)；
The internal combustion engine (1) connect with Benitration reactor (10) and hydrogen-manufacturing reactor (14) respectively, and in internal combustion engine (1) and hydrogen production reaction
Gas bypass flow control valve (2) are provided between device (14)；The hydrogen-manufacturing reactor (14) connect with Benitration reactor (10),
And gaseous jet simulation device (5) are provided between hydrogen-manufacturing reactor (14) and Benitration reactor (10)；The Benitration reactor (10),
Lithium bromide chiller (11) and chimney (12) are sequentially connected；The reducing agent reservoir (13) respectively with Benitration reactor (10) and system
Hydrogen reactor (14) connection, and reducing agent bypass flow is provided between reducing agent reservoir (13) and hydrogen-manufacturing reactor (14)
Control valve (4) is provided with reducing agent flow control valve (6) between reducing agent reservoir (13) and Benitration reactor (10)；Institute
It states in Benitration reactor (10) and atomizer (8), rectifier (7) and Ag/Al is installed2O3Catalyst layer (9), the hydrogen manufacturing are anti-
It answers in device (14) and producing hydrogen, catalyzing oxidant layer (3) is installed.
2. a kind of working method of internal combustion engine nitrogen oxides control system efficiently without secondary pollution as described in claim 1,
It is characterized in that, the working method is as follows: high-temperature flue gas discharge, most of flue gas out of internal combustion engine (1) enter denitration reaction
Device (10) is mixed with the reducing agent that atomizer (8) sprays, after rectified device (7), into Ag/Al2O3Catalyst layer (9) is complete
At denitration reaction, it is discharged later by lithium bromide chiller (11) and by chimney (12), the flow of reducing agent is by reduction agent flux control
Valve (6) control processed；To improve denitration efficiency, take in the reducing agent reservoir (13) all the way reducing agent enter hydrogen-manufacturing reactor
(14), H is generated under the action of producing hydrogen, catalyzing oxidant layer (3)2, temperature and heat needed for process by internal combustion engine (1) outlet
Flue gas provides；Reduction dosage needed for flue gas flow, hydrogen manufacturing is respectively by gas bypass flow control valve (2), reducing agent by-pass
Control valve (4) control, the reducing agent that atomizer (8) sprays are provided by reducing agent reservoir (13)；Reducing agent is anti-in hydrogen manufacturing
Answer the gas that cracking generates in device (14) after gaseous jet simulation device (5) separation, H2And the flue gas after heat release enters denitration reaction
Device (10) is reacted.
3. the working method of internal combustion engine nitrogen oxides control system efficiently without secondary pollution according to claim 2,
It is characterized in that, the reducing agent that reducing agent reservoir (13) is provided to Benitration reactor (10) and hydrogen-manufacturing reactor (14) is ethyl alcohol.
4. the working method of internal combustion engine nitrogen oxides control system efficiently without secondary pollution according to claim 2,
It is characterized in that, the gaseous jet simulation device (5) of hydrogen-manufacturing reactor (14) outlet setting is by H2It is separately separated out.
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| CN201811544687.XA CN109589791A (en) | 2018-12-17 | 2018-12-17 | A kind of internal combustion engine nitrogen oxides control system and its working method efficiently without secondary pollution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811544687.XA CN109589791A (en) | 2018-12-17 | 2018-12-17 | A kind of internal combustion engine nitrogen oxides control system and its working method efficiently without secondary pollution |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539226A (en) * | 2018-03-29 | 2018-09-14 | 中国科学院理化技术研究所 | Fuel cell system for long-time underwater power generation |
| WO2018173034A1 (en) * | 2017-03-23 | 2018-09-27 | Yitzhaki Dan | The present invention relates to a novel exhaust after-treatment system for a diesel engine or a spark ignition gasoline, cng,lng, engine, |
| CN208089381U (en) * | 2018-01-31 | 2018-11-13 | 华电电力科学研究院有限公司 | A kind of exhaust heat of internal combustion engine utilizes device |
| CN209576319U (en) * | 2018-12-17 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of internal combustion engine nitrogen oxides control system efficiently without secondary pollution |
-
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- 2018-12-17 CN CN201811544687.XA patent/CN109589791A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018173034A1 (en) * | 2017-03-23 | 2018-09-27 | Yitzhaki Dan | The present invention relates to a novel exhaust after-treatment system for a diesel engine or a spark ignition gasoline, cng,lng, engine, |
| CN208089381U (en) * | 2018-01-31 | 2018-11-13 | 华电电力科学研究院有限公司 | A kind of exhaust heat of internal combustion engine utilizes device |
| CN108539226A (en) * | 2018-03-29 | 2018-09-14 | 中国科学院理化技术研究所 | Fuel cell system for long-time underwater power generation |
| CN209576319U (en) * | 2018-12-17 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of internal combustion engine nitrogen oxides control system efficiently without secondary pollution |
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Application publication date: 20190409 |