CN102698677A - Plasma impinging stream reaction method - Google Patents
Plasma impinging stream reaction method Download PDFInfo
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- CN102698677A CN102698677A CN2012101458304A CN201210145830A CN102698677A CN 102698677 A CN102698677 A CN 102698677A CN 2012101458304 A CN2012101458304 A CN 2012101458304A CN 201210145830 A CN201210145830 A CN 201210145830A CN 102698677 A CN102698677 A CN 102698677A
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Abstract
The invention relates to a plasma impinging stream reaction method, and particularly relates to a reaction method of heating and accelerating coal powder by high-temperature plasma jet and then impinging to reinforce the mixing and the heat transmission. The method disclosed by the invention adopts two or more groups of plasma torches and mixers coaxially arranged around the external wall of a reactor in the same direction; in a working process, the coal powder is conveyed into the mixers through material feed pipes to deliver into the high-temperature plasma jet generated by plasmas, and then is impinged with the identical plasma jet in a central area of the reactor after being heated and accelerated so as to form an impinging stream turbulence area to reinforce the mixing and the heat transmission of the coal powder and the high-temperature jet.
Description
Technical field
The present invention relates to a kind of plasma impinging stream reaction method.
Technical background
Coal plasma pyrolysis system acetylene technology is by plasma temperature is high, reactivity is good coal and the approaching C/Hratio characteristic of acetylene, coal dust is directly sprayed into temperature spend in the degree high-temperature plasmas up to ten thousand 3500; The explosion that coal dust is exceedingly fast discharges the fugitive constituent in producing coal, and adds that high-temperature plasma also generates the cracking gas of a large amount of hydrocarbon components together with the solid carbon effect; Reach chemical balance very rapidly, forming with acetylene, hydrogen is master's cracking gas, and hot plasma Coal Pyrolysis system acetylene process is the course of reaction of under extreme conditions operating; Superhigh temperature and Millisecond time of contact, coal dust mixes with high-temperature plasma and conducts heat is the key point that realizes the coal dust reaction, and this reaction unit with regard to article on plasma body coal system acetylene is designed with a very high requirement; Usually coal in plasma system acetylene reaction device is a downstriker, and plasmatorch is at top, is connecting blender and reactor successively below the plasmatorch; Plasmatorch produces plasma jet and sprays downwards; Coal dust is injected by blender and plasma jet vertical direction with certain speed, mixes with plasma and reacts, because the plasma jet rigidity is strong; Speed is high; Concentration of energy causes coal dust to mix with it and reacts comparatively difficulty, directly the influence efficient of reacting; Moreover after the unit scale expansion, above-mentioned phenomenon is particularly outstanding.The impinging stream notion is since being proposed by Elperin eighties of last century seventies; Its basic thought is that two strands or a plurality of fluids flow and head-on collision in opposite directions; Thereby produce the zone of a turbulence; Strengthen its heat transfer of crossing title, transport phenomenon, adopt the impinging stream notion in Chemical Manufacture such as the drying of material and mixing, to obtain effect preferably.
Coal plasma pyrolysis belongs to the reaction of the mutually ultrashort contact of gas-solid, obtain high gas forming amount, just must at short notice the lot of energy of plasma be transmitted coal supply; But the reason that hinders coal dust gasification has two: one of which; After plasma jet contacted with coal dust moment; Pulverized coal particle surface formation air film and gel (thick liquid), air film and gel stop heat further to the transmission of coal dust center, simultaneously because formation air film and gel need absorb a large amount of heat energy on every side; The quick decline of pulverized coal particle ambient temperature; The coal dust center can not obtain to be rapidly heated the gasification energy needed and be in lower temperature, behind quenching, goes out reactor, and the result always has the not gasification of most of coal dust.Its two, when plasma jet contacted with coal dust moment, plasma jet and pulverized coal particle relative velocity were maximum, at this moment convective heat-transfer coefficient is also maximum.After plasma jet contacted with coal dust moment, coal dust was quickened by plasma jet very soon, and plasma jet and pulverized coal particle speed equate that at this moment convective heat-transfer coefficient is also minimum.More than two reasons cause coal plasma pyrolysis system acetylene gas forming amount and concentration of acetylene to be difficult to improve, thereby cause production cost too high.
Summary of the invention
The objective of the invention is to solve coal dust time of staying weak point in the plasma jet of high temperature; Pulverized coal particle can not get abundant heating, the problem that rate of gasification is low, and then provide a kind of with after coal dust jet and plasmatorch high temp jet premix and the heating acceleration; Identical with it jets collision; Realized pulverized coal particle through quickening, slow down and quickening three processes again, plasma jet and pulverized coal particle are kept higher relative velocity, and coal dust prolonged in the high-temperature area time of staying simultaneously; Reached the reinforcement coal dust and mixed and diabatic process, strengthened the coal dust gasification effect with the high-temperature plasma jet.
The solution that realizes above-mentioned purpose is:
A kind of plasma impinging stream reaction method comprises plasmatorch, reactor, blender composition, and two groups or more plasmatorch and blender are coaxial to be installed on the reactor outer wall periphery in opposite directions; Coal dust gets into blender to be mixed with plasma jet; The coal dust cracking reaction is taken place by plasma jet heating and acceleration in coal dust, and the high temperature and high speed gaseous mixture jet that contains preliminary cracking coal dust is spurted into the reactor from mixer outlet; The identical with it jets collision of gaseous mixture jet that in reactor, contains coal dust; Pulverized coal particle descends at the knock-on process medium velocity fast, and in knock-on process, is heated, and pulverized coal particle is quickened once more by the head-on collision jet again and heats in the head-on collision central area.
Described a kind of plasma impinging stream reaction method; Comprise by plasmatorch, reactor, blender and forming; The coaxial reactor outer wall periphery that is installed in opposite directions of two groups or more plasmatorch, it is arbitrary that reactor top is installed plasmatorch and blender or powder inlet pipe.
Described a kind of plasma impinging stream reaction method, it is all identical with the blender powder sending quantity to be connected on the reactor outer wall plasmatorch power, stable to guarantee the impinging stream turbulence district that produces in the reactor center zone.
Described a kind of plasma impinging stream reaction method, reactor top can be installed at least one plasmatorch, according to the reactor assembly energy requirement, increases reactor power.
Described a kind of plasma impinging stream reaction method, the plasmatorch watt level of installing on reactor top plasmatorch power and the reactor outer wall periphery is 1KW-10MW; The power that is plasmatorch is configured according to reactor needs additional heat size.
Described a kind of plasma impinging stream reaction method is applicable to plasma coal cracking technology, also can be used for metal smelt, material modification, plasma spraying etc.
A kind of plasma impinging stream reaction method of the present invention; Coal dust is sent in the plasma jet the blender from feed pipe; After heating, quickening; Spurt into reactor center and the head-on collision of in opposite directions fluid, form impinging stream turbulence district, coal dust is fully mixed and heat in the reactor center zone.
Advantage of the present invention and effect are:
One of which utilizes impinging stream to strengthen coal dust and mixes with high temperature fluid and conduct heat, and has significantly improved the reaction efficiency of coal dust.
Its two, adopt two or more sets to clash in opposite directions, avoided the bump of coal dust and wall and off-energy avoids high temperature fluid that wall is ablated, help prolonging energy utilization and equipment life.
Its three, adopt the reaction unit of impinging stream, can avoid because the enlarge-effect that scale expansion produces, and simple and reliable for structure.
Description of drawings
Fig. 1 is the sketch map of the embodiment of the invention 1.
Fig. 2 is the vertical view of the embodiment of the invention 1.
Fig. 3 is the sketch map of the embodiment of the invention 2.
Drawing reference numeral explanation: 1-plasmatorch 2-reactor 3-feed pipe 4-blender.
The specific embodiment
Embodiment 1
Referring to accompanying drawing 1 and accompanying drawing 2, a kind of plasma impinging stream reaction method comprises that reactor 2 outer walls periphery installs plasmatorch 1, the blender 4 of 1MW, on the top of reactor 2 the 1MW plasmatorch is installed.The plasmatorch 1 on reactor 2 tops is used to the reaction unit of heating; Coal dust gets into blenders 4 by feed pipe 3 and sprays into the high temp jet that plasmatorch produces, and is clashed each other by the such four strands plasma high temp jets of carrying pulverized coal particle secretly and strengthens coal dust and mix with high-temperature plasma and conduct heat.
Embodiment 3
The difference of embodiment 3 and embodiment 1,2 is coaxial 6 plasmatorch 1, the blender 4 of being uniformly distributed with on the conplane circumference of reactor 2, and plasmatorch 1 power is 10MW.
Embodiment 5
Embodiment 5 is with the difference of embodiment 1,2,3,4; The coaxial plasmatorch that is uniformly distributed with one deck 1MW 1 on the circumference of reactor 2; And blender 4 is not set, the top of reactor connects feed pipe 3. and promptly forms turbulent flow in reactor center plasma jet that produces and the coal dust head-on collision of coming in from reactor top.
Embodiment 6
Embodiment 6 is with the difference of embodiment 1-5; The coaxial plasmatorch that is uniformly distributed with one deck 1MW 1 on the circumference of reactor 2; And blender 4 is not set; The top of reactor 2 connects 5MW plasmatorch 1 and blender 4, promptly forms turbulent flow at reactor center plasma jet that produces and the coal dust of coming in from reactor top and the head-on collision of plasma mixing jet.
Claims (6)
1. plasma impinging stream reaction unit and method is characterized in that comprising plasmatorch, reactor, blender and form, and two groups or more plasmatorch and blender be coaxial, and to be installed in the reactor outer wall in opposite directions peripheral; Coal dust gets into blender to be mixed with plasma jet; The coal dust cracking reaction is taken place by plasma jet heating and acceleration in coal dust, and the high temperature and high speed gaseous mixture jet that contains preliminary cracking coal dust is spurted into the reactor from mixer outlet; The identical with it jets collision of gaseous mixture jet that in reactor, contains coal dust; Pulverized coal particle descends at the knock-on process medium velocity fast, and in knock-on process, is heated, and pulverized coal particle is quickened once more by the head-on collision jet again and heats in the head-on collision central area.
2. plasma impinging stream reaction unit and method; It is characterized in that comprising by plasmatorch, reactor, blender and form; The coaxial reactor outer wall periphery that is installed in opposite directions of two groups or more plasmatorch, it is arbitrary that reactor top connects plasmatorch and blender or powder inlet pipe.
3. a kind of plasma impinging stream reaction unit according to claim 1 and method, it is all identical with the blender powder sending quantity to it is characterized in that being connected on the reactor outer wall plasmatorch power.
4. a kind of plasma impinging stream reaction unit according to claim 2 and method, it is all identical to it is characterized in that being installed in the peripheral plasmatorch power of reactor outer wall.
5. a kind of plasma impinging stream reaction unit according to claim 1 and method is characterized in that reactor top can install at least one plasmatorch.
6. according to arbitrary described a kind of plasma impinging stream reaction unit of claim 1-5 and method, it is characterized in that the plasmatorch watt level of installing on reactor top plasmatorch power and the reactor outer wall periphery is 1KW-10MW.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210145830.4A CN102698677B (en) | 2012-05-12 | 2012-05-12 | Plasma impinging stream reaction method |
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| CN201210145830.4A CN102698677B (en) | 2012-05-12 | 2012-05-12 | Plasma impinging stream reaction method |
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| CN102698677A true CN102698677A (en) | 2012-10-03 |
| CN102698677B CN102698677B (en) | 2014-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525559A (en) * | 2016-09-18 | 2017-03-22 | 广西电网有限责任公司电力科学研究院 | Petroleum product safe carbonization device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD132247A1 (en) * | 1977-07-29 | 1978-09-13 | Hans Froehlich | METHOD FOR GAS MIXING FOR PROTECTIVE GASS WELDING AND PLASMA CUTTING |
| GB2138256A (en) * | 1983-03-28 | 1984-10-17 | Skf Steel Eng Ab | Method of heating process air for industrial purposes |
| US20070048550A1 (en) * | 2005-08-26 | 2007-03-01 | Millero Edward R | Coating compositions exhibiting corrosion resistance properties, related coated substrates, and methods |
| CN101508622A (en) * | 2009-03-19 | 2009-08-19 | 清华大学 | Coal powder entrance structure applied to reactor for producing acetylene with plasma coal cracking |
| CN202606146U (en) * | 2012-04-01 | 2012-12-19 | 新疆天业（集团）有限公司 | Plasma flow-crashing reaction device |
-
2012
- 2012-05-12 CN CN201210145830.4A patent/CN102698677B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD132247A1 (en) * | 1977-07-29 | 1978-09-13 | Hans Froehlich | METHOD FOR GAS MIXING FOR PROTECTIVE GASS WELDING AND PLASMA CUTTING |
| GB2138256A (en) * | 1983-03-28 | 1984-10-17 | Skf Steel Eng Ab | Method of heating process air for industrial purposes |
| US20070048550A1 (en) * | 2005-08-26 | 2007-03-01 | Millero Edward R | Coating compositions exhibiting corrosion resistance properties, related coated substrates, and methods |
| CN101508622A (en) * | 2009-03-19 | 2009-08-19 | 清华大学 | Coal powder entrance structure applied to reactor for producing acetylene with plasma coal cracking |
| CN202606146U (en) * | 2012-04-01 | 2012-12-19 | 新疆天业（集团）有限公司 | Plasma flow-crashing reaction device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525559A (en) * | 2016-09-18 | 2017-03-22 | 广西电网有限责任公司电力科学研究院 | Petroleum product safe carbonization device |
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| CN102698677B (en) | 2014-10-29 |
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