CN109628164A - A kind of overcritical hydro-thermal combustion method using nanometer fuel - Google Patents
A kind of overcritical hydro-thermal combustion method using nanometer fuel Download PDFInfo
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- CN109628164A CN109628164A CN201811380085.5A CN201811380085A CN109628164A CN 109628164 A CN109628164 A CN 109628164A CN 201811380085 A CN201811380085 A CN 201811380085A CN 109628164 A CN109628164 A CN 109628164A
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- combustion method
- thermal
- overcritical hydro
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/02—Liquid fuel
- F23K5/08—Preparation of fuel
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/12—Inorganic compounds
- C10L1/1233—Inorganic compounds oxygen containing compounds, e.g. oxides, hydroxides, acids and salts thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/30—Organic compounds compounds not mentioned before (complexes)
- C10L1/305—Organic compounds compounds not mentioned before (complexes) organo-metallic compounds (containing a metal to carbon bond)
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
Abstract
The invention discloses a kind of overcritical hydro-thermal combustion methods using nanometer fuel, including nanometer preparation of fuel, the burning of overcritical hydro-thermal, the recycling and regeneration of supercritical water oxidation and nanoparticle.The present invention improves conductivity of fuel, liquid fuel heating, evaporation rate is promoted to improve its combustion characteristics to solve the problems, such as that conventional liquid fuel combustion flame in supercritical water thermal environment is unstable by introducing nanoparticle as liquid fuel filler；In addition, the method for the present invention can effectively reduce the extinction temperature of liquid fuel, so that fuel minimum concentration needed for reducing, saves fuel consumption, system performance driving economy is improved.
Description
Technical field
The present invention relates to the methods that efficiency of combustion and hydro-thermal flame holding are improved in overcritical hydro-thermal burning process, specifically
It is related to a kind of overcritical hydro-thermal combustion method using nanometer fuel.
Background technique
Supercritical water refers to that temperature and pressure is all larger than the water of critical point (pressure > 22.1MPa, temperature > 374.2 DEG C), it
With special physical and chemical performance, such as small dielectric constant, big heat and mass transfer coefficient.Overcritical hydro-thermal combustion technology is
A kind of new and effective clean-burning technology, the technology form water using liquid auxiliary fuel ethyl alcohol, methanol etc. in supercritical water
Hot combustion zone, to form the hydro-thermal reaction environment of high temperature and pressure.The technology is to realize to have using supercritical water technical treatment
Machine waste water, decomposing biomass hydrogen manufacturing and high-efficiency cleaning burning coal derived fuel etc. create condition, and have broad based growth prospect.
It is existing largely about hydro-thermal flame characteristics, hydro-thermal combustion reactor and hydro-thermal combustion technology engineer application side at present
The research in face.The stability for improving hydro-thermal combustion flame in reactor is to determine that the technology is used for the actual critical issue of engineering,
Related stable combustion technology Research Points include the heat storage capacity etc. for reducing fuel extinction temperature and improving reactor.But how
Stable combustion flame is maintained in supercritical water thermal environment, the key technology for being still current overcritical hydro-thermal combustion field is difficult
Topic.Therefore, highly efficient hydro-thermal combustion process method is explored with significant application value.
Atomizing of liquid fuel, evaporation process are a most important step, heat and mass efficiency quilt in combustion process
It is considered the principal element of control burning.To improve fuel droplet evaporation rate, it is necessary to improve drop heating conduction.But mesh
Traditional fuel heating conduction used in preceding overcritical hydro-thermal burning process is poor.This is to cause current hydro-thermal burning fire tired
The main reason for hardly possible, flame instability.For this problem, the present invention proposes a kind of Novel supercritical hydro-thermal burning process side
Method is scattered in the metal of high thermal conductivity or non pinetallic nano are particle-stabilised in conventional liquid fuel, forms high heat conducting nano combustion
Material, significantly improves evaporation characteristic and fire behaviour of the liquid fuel in supercritical water environment, to reduce ignition temperature, improve
The stability of hydro-thermal burning, forms the new process of overcritical hydro-thermal combustion reaction.
Summary of the invention
The purpose of the present invention is to solve the deficiencies in the prior art, provide a kind of overcritical hydro-thermal using nanometer fuel
Combustion method, the method for the present invention are scattered in the metal of high thermal conductivity or non pinetallic nano are particle-stabilised in conventional liquid fuel,
High heat conducting nano fuel is formed, evaporation characteristic and fire behaviour of the liquid fuel in supercritical water environment are significantly improved, thus
The stability for reducing ignition temperature, improving hydro-thermal burning, forms the new process of overcritical hydro-thermal combustion reaction.
To achieve the above object, the overcritical hydro-thermal combustion method using nanometer fuel designed by the present invention, including receive
Rice preparation of fuel, the burning of overcritical hydro-thermal, the recycling and regeneration of supercritical water oxidation and nanoparticle, specific steps are such as
Under:
1) solid nanoparticles and dispersing agent are added in liquid fuel, first using mechanical stirring to uniform, then are used
Stable nanometer fuel suspension is made in ultrasonic vibration；
2) nanometer fuel made from step 1) is forced at normal temperature after reactor pressure and is passed through overcritical hydro-thermal burning
In device, then it will be passed through in supercritical water heat combustor and mixed with nanometer fuel by preheating and the oxygen compressed, nanometer fuel quilt
Oxygen, which heats rapidly, occurs combustion reaction, and the heat for generation of burning is transferred to rapidly entire supercritical reaction device, and super face will be added
Reaction mass to be processed and the oxygen heating through being overpressurized to 23~30MPa of supercriticality in boundary's reactor, 400~600
DEG C, so that supercritical water reaction occur；
3) reactor is discharged in the solid nanoparticles in step 2) together with liquid-phase reaction product, it is cooling through backheat unit
Enter filter device afterwards to be separated and recovered；The nanoparticle isolated enters regeneration unit, carries out nanoparticle regeneration with weight
It is multiple to use.
Preferably, the volume fraction of the solid nanoparticles be 0.5~5%, the solid nanoparticles and
The molar ratio of dispersing agent is 1:2~1:5.
Preferably, 1~3h of mechanical stirring in the step 1), 2~5h of ultrasonic vibration.
Preferably, the solid nanoparticles are one in metal oxide, nano metal or carbon nanotube
Kind；The metal oxide is copper oxide, aluminum oxide, iron oxide etc., and the nano metal is copper, aluminium and iron etc..
Preferably, the dispersing agent is lauryl sodium sulfate, neopelex, cetyl bromination
One of ammonium, polyvinylpyrrolidone, polyethylene glycol, alkyl hydrosulfide etc..
Preferably, the mass fraction of the liquid fuel is 20%~50%, and the liquid fuel is methanol, second
One of alcohol, propyl alcohol, ethylene glycol etc..
Preferably, electric heating or gas heating stove heating can be used in the high-temperature oxygen initial phase, normal to transport
The heating of reaction product backheat unit can be used after row, be not required to extraneous supply heat.
Preferably, the supercritical water reaction includes organic wastewater oxidation processing and biomass gasifying hydrogen making etc..
Preferably, the nanoparticle regeneration unit, when being metal oxide for initial nano-particle composition,
It is made of mechanical lapping equipment, the nanoparticle for partially sintering reunion is reverted into receiving with certain particle size by mechanical lapping
Rice flour body；When such as the nanoparticle is nano metal particles or carbon nanotube, regenerating unit can be not provided with.
The beneficial effects of the present invention are:
First, the present invention, which stablizes the metal of high thermal conductivity or non pinetallic nano particle as the filler of liquid fuel, to be divided
It dissipates in conventional liquid fuel, forms high heat conducting nano fuel, improve conductivity of fuel, promote liquid fuel heating, evaporation speed
Degree reduces ignition temperature, evaporation characteristic and fire behaviour of the liquid fuel in supercritical water environment is significantly improved, to solve
It has determined conventional liquid fuel unstable problem of combustion flame in supercritical water thermal environment, has improved its combustion characteristics；
Second, the method for the present invention can effectively reduce the extinction temperature of liquid fuel, thus fuel minimum concentration needed for reducing,
Fuel consumption is saved, system performance driving economy is improved.
Detailed description of the invention
Fig. 1 is the flow chart using the overcritical hydro-thermal combustion method processing organic wastewater of nanometer fuel of the present invention.
Specific embodiment
The specific implementation of overcritical hydro-thermal combustion method processing organic wastewater with reference to the accompanying drawing and using nanometer fuel
The present invention is described in further detail for example:
It is for 3% copper oxide nano particle (< 100nm) and lauryl sodium sulfate addition mass fraction by volume fraction
In 30% methanol solution, mechanical stirring 1h, then ultrasonic vibration 3h, the nanometer fuel of nanoparticle stable suspersion is made, wherein
The molar ratio of copper oxide and lauryl sodium sulfate is 1:3；Nanometer fuel obtained is forced by high-pressure pump at normal temperature
Supercritical reaction 23~30MPa of pressure, is passed through supercritical water heat combustor.Oxygen is preheating to through compressor pressurization and backheat unit
Temperature is passed through supercritical water heat combustor simultaneously after being 400~500 DEG C, and the two is mixed and burned rapidly.The heat that burning generates will
Organic wastewater and oxygen heating in supercritical reaction device are to 23~30MPa of supercritical reaction state, 400~600 DEG C, in waste water
Debirs so that quickly occur supercritical water oxidation, generate carbon dioxide and water, treatment of Organic Wastewater efficiency be reachable
99% or more.Reactor is discharged together with supercritical water oxidation liquid product in copper oxide particle；It will include copper oxide particle
Product suspension copper oxide particle is separated and recovered after backheat unit is cooling, then through filter.According to isolating
The XRD diagram spectrum analysis and sem analysis of solids, the above are copper oxide for ingredient 99%, illustrate supercritical water oxidation pair
Nano-particle composition has not significant impact.Nanoparticle is in polycrystalline aggregate, illustrates that nanoparticle is sent out in pyroreaction environment
It has given birth to and has cohered, partial size is about 150~200nm, and monocrystalline partial size is about 30~50nm.The copper oxide isolated is filled through mechanical lapping
It sets after being ground to initial particle, can be recycled and recycle.
The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis
Any other various changes and modifications that technical concept of the invention is made should be included in the guarantor of the claims in the present invention
It protects in range.
Claims (9)
1. a kind of overcritical hydro-thermal combustion method using nanometer fuel, it is characterised in that: including nanometer preparation of fuel, overcritical
Hydro-thermal burning, the recycling and regeneration of supercritical water oxidation and nanoparticle, the specific steps are as follows:
1) solid nanoparticles and dispersing agent are added in liquid fuel, first using mechanical stirring to uniform, then using ultrasound
Vibration, is made stable nanometer fuel suspension；
2) nanometer fuel made from step 1) is forced at normal temperature after reactor pressure and is passed through in supercritical water heat combustor,
It will be passed through in supercritical water heat combustor by the oxygen for preheating and compressing and mixed with nanometer fuel again, nanometer fuel is fast by oxygen
Combustion reaction occurs for speed heating, and the heat for generation of burning is transferred to rapidly entire supercritical reaction device, supercritical reaction will be added
Reaction mass to be processed and the oxygen heating through being overpressurized to 23~30MPa of supercriticality in device, 400~600 DEG C, thus
Supercritical water reaction occurs；
3) reactor is discharged in the solid nanoparticles in step 2) together with liquid-phase reaction product, it is laggard through the cooling of backheat unit
Enter filter device to be separated and recovered；The nanoparticle isolated enters regeneration unit, carries out nanoparticle regeneration to repeat to make
With.
2. a kind of overcritical hydro-thermal combustion method using nanometer fuel according to claim 1, it is characterised in that: described
The volume fraction of solid nanoparticles is 0.5~5%, and the molar ratio of the solid nanoparticles and dispersing agent is 1:2~1:5.
3. a kind of overcritical hydro-thermal combustion method using nanometer fuel according to claim 1, it is characterised in that: described
1~3h of mechanical stirring in step 1), 2~5h of ultrasonic vibration.
4. a kind of overcritical hydro-thermal combustion method using nanometer fuel according to claim 1, it is characterised in that: described
Solid nanoparticles are one of metal oxide, nano metal or carbon nanotube；The metal oxide be copper oxide,
Aluminum oxide, iron oxide etc., the nano metal are copper, aluminium and iron etc..
5. a kind of overcritical hydro-thermal combustion method using nanometer fuel according to claim 1, it is characterised in that: described
Dispersing agent is lauryl sodium sulfate, neopelex, cetyl ammonium bromide, polyvinylpyrrolidone, poly- second two
One of alcohol, alkyl hydrosulfide etc..
6. a kind of overcritical hydro-thermal combustion method using nanometer fuel according to claim 1, it is characterised in that: described
The mass fraction of liquid fuel is 20%~50%, and the liquid fuel is one of methanol, ethyl alcohol, propyl alcohol, ethylene glycol etc..
7. a kind of overcritical hydro-thermal combustion method using nanometer fuel described in any one according to claim 1~6, special
Sign is: electric heating or gas heating stove heating can be used in the high-temperature oxygen initial phase, and reaction can be used after normal operation
The heating of product backheat unit is not required to extraneous supply heat.
8. a kind of overcritical hydro-thermal combustion method using nanometer fuel described in any one according to claim 1~6, special
Sign is: the supercritical water reaction includes organic wastewater oxidation processing and biomass gasifying hydrogen making etc..
9. a kind of overcritical hydro-thermal combustion method using nanometer fuel described in any one according to claim 1~6, special
Sign is: the nanoparticle regeneration unit, when being metal oxide for initial nano-particle composition, by mechanical lapping equipment
The nanoparticle for partially sintering reunion is reverted to the nano-powder with certain particle size by mechanical lapping by composition；As this is received
When rice corpuscles is nano metal particles or carbon nanotube, regenerating unit can be not provided with.
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| CN201811380085.5A CN109628164B (en) | 2018-11-20 | 2018-11-20 | Supercritical hydrothermal combustion method adopting nano fuel |
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| CN201811380085.5A CN109628164B (en) | 2018-11-20 | 2018-11-20 | Supercritical hydrothermal combustion method adopting nano fuel |
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| CN109628164A true CN109628164A (en) | 2019-04-16 |
| CN109628164B CN109628164B (en) | 2021-01-08 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934468A (en) * | 2014-04-02 | 2014-07-23 | 西安交通大学 | Supercritical hydrothermal synthesis method of nano metal or nano metal oxide particles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103934468A (en) * | 2014-04-02 | 2014-07-23 | 西安交通大学 | Supercritical hydrothermal synthesis method of nano metal or nano metal oxide particles |
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