CN102078782B - Method and device for improving the internal circulation of particles in the riser through the return air at the top of the tower - Google Patents
Method and device for improving the internal circulation of particles in the riser through the return air at the top of the tower Download PDFInfo
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- CN102078782B CN102078782B CN 201010598455 CN201010598455A CN102078782B CN 102078782 B CN102078782 B CN 102078782B CN 201010598455 CN201010598455 CN 201010598455 CN 201010598455 A CN201010598455 A CN 201010598455A CN 102078782 B CN102078782 B CN 102078782B
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- lift pipe
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- 239000002245 particle Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000000452 restraining effect Effects 0.000 claims description 24
- 241000282326 Felis catus Species 0.000 claims description 15
- 230000036651 mood Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention provides a device and method for improving internal, particular circulation in a lift pipe through return air at tower top. The device comprises a lift pipe, wherein the top of the lift pipe is of a constraint structure; the side wall of the lift pipe is provided with a fan outlet; the side wall of the top of the lift pipe is provided with a return air port communicated with the constraint structure; the return air port is positioned above the fan outlet and located at the same side of the lift pipe as the fan outlet; and a pipeline or clapboard for backflow particles to go downwards is arranged in the lift pipe. Return air is horizontally introduced to the constraint structure of the top of the lift pipe; the return air flow carries downwards the particles separated by the constraint structure at the top of the lift pipe; and the particles are sent to the bottom of the lift pipe through the pipeline or clapboard for the backflow particles to go downwards. According to the invention, the separation effect of the top constraint structure is effectively utilized, the resistance of the lift pipe system is not obviously improved, and energy consumption is not obviously increased. The device and method can be applied to the fields of chemical industry, grain drying and quality of smoke pollutants.
Description
Technical field
What the present invention relates to is a kind of method that improves circulation in the riser endoparticle, is specially a kind of combining with the leg outlet restraining structure by loopback wind and realizes the method for reinforcing particle inner loop.The present invention also relates to a kind of riser that can improve circulation in the riser endoparticle.
Background technology
The gas-solid fluidization reaction has become the main flow of process industrial reaction and separation equipment, occupies very consequence in industrial production.What each large petrochemical enterprise of old and well-known family generally adopted at present is fluidized catalytic cracking unit, and each high flame electricity power enterprise generally adopts large circulating fluidized bed boiler, and the recirculating fluidized bed flue gas is crossed six technology, all is the outstanding exemplary applications of fluidization technology.
Riser is the generally address of fluidizing reactor.Improve the endocorpuscular inner loop effect of riser, be the problem that continues research and development in the industry always.Mostly measure in the past is to adopt increases internals, the change housing structure is realized, there are wearing and tearing in these methods majorities, are not suitable for the problems such as water capacity is high, tough material.The interior cyclic hardening technology of particle is focus and the difficulties of multi-phase flow technology area research always.Existing riser falls particle in the tower after rise along the tower body wall in use under the effect of restraining structure, the descending degree of depth in tower body is limited, and the air-flow that is upwards flowed again soon takes cat head to, and circulating effect is relatively poor.Therefore say, existing riser exists particle relatively poor in lifting intraductal retention time inner loop effect short, that cause the riser particle in use, effective active length of having to lengthen riser in order to prolong particle at the lifting intraductal retention time, the working volume of riser is increased, cause the unnecessary problems such as waste.
Summary of the invention
The object of the present invention is to provide a kind of particle that can prolong to improve the device and method that circulates in the riser endoparticle at the cat head loopback wind that passes through that promotes intraductal retention time, improve the endocorpuscular inner loop effect of riser.
The object of the present invention is achieved like this:
Of the present inventionly improve the device that circulates in the riser endoparticle by cat head loopback wind and comprise riser, the top of described riser is restraining structure, the sidewall of described riser is provided with fan outlet, be provided with a loopback air port that communicates with restraining structure at the top of riser sidewall, the loopback air port is positioned at the same side that the top of fan outlet and loopback air port and fan outlet are positioned at riser, in riser, be provided with for backflow particle descending pipeline or dividing plate, and describedly be oppositely arranged for the descending pipeline of backflow particle or dividing plate and loopback air port.
The method that improves circulation in the riser endoparticle by cat head loopback wind of the present invention, the device that passes through to circulate in the cat head loopback wind raising riser endoparticle of selecting comprises riser, the top of riser is restraining structure, the sidewall of riser is provided with fan outlet, be provided with a loopback air port that communicates with restraining structure at the top of riser sidewall, the loopback air port is positioned at the same side that the top of fan outlet and loopback air port and fan outlet are positioned at riser, in riser, be provided with for backflow particle descending pipeline or dividing plate, and describedly be oppositely arranged for the descending pipeline of backflow particle or dividing plate and loopback air port; Level is introduced loopback wind at the restraining structure place at the top of riser, and loopback general mood stream carries the particle that the riser top relies on restraining structure to separate downwards, sends into the riser bottom through being used for the descending pipeline of backflow particle or dividing plate.
It is riser system fan exit gas to be drawn deliver to the riser top that described level is introduced loopback wind.
It is to adopt a small-sized fan or directly utilize on-the-spot strength to carry pressure-air that wind regime is provided that described level is introduced loopback wind.
The wind speed of preferably controlling loopback wind is 10-15m/s.
The invention solves existing riser exists particle promoting the problems such as height that intraductal retention time inner loop effect short, that cause the riser particle is relatively poor and have to increase riser at the lifting intraductal retention time in order to prolong particle in use.
Technical essential of the present invention is: riser reactor system fan outlet gas is partly introduced being transmitted back to the leg outlet top; At the leg outlet opposition side downstream circulation passage is set; Rely on the gas solid separation effect of riser top restraining structure and the strength conveying effect of loopback wind that the top particle is transmitted back to the riser bottom, realized the endocorpuscular reinforcement inner loop of riser.
The invention has the beneficial effects as follows:
The inventive method is utilized loopback wind and is improved circulating effect in the riser endoparticle in the mode that the downstream circulation passage is set at the leg outlet opposition side; rely on the gas solid separation effect of riser top restraining structure and the strength conveying effect of loopback wind that the top particle is transmitted back to the riser bottom, realized the endocorpuscular reinforcement inner loop of riser.This method can increase riser endoparticle concentration 5-10%, has increased the particle time of staying (being equivalent to reduce the height of riser), and then strengthens the inner loop effect of riser particle.Under the same reaction Parameter Conditions, can suitably reduce the height of riser.Reduce the height of riser, equal to have reduced the equipment investment expense, simultaneously because the shortening of gas flow process can obviously reduce the system flow resistance, and then realize the saving of operation power consumption.Only calculate with the gas flow rate of 10m/s, 1 meter of every reduction riser height approximately can be saved and realize all drag losseses of 10Pa, energy saving in running ratio approximately 0.03%
The present invention is by the reinforcement inner loop that wind send particle to realize particle, and the particle that can be adapted to certain water capacity is realized stable circulation; The present invention has effectively utilized top restraining structure centrifugation, and the increase of riser SR is not obvious, without obviously energy consumption increase.The present invention can be applicable to chemical industry, grain drying, field, smoke pollution amount field.
Description of drawings
Fig. 1 is the principle schematic of riser;
Fig. 2 is the A-A cutaway view (tower body top restraining structure endoparticle phase flow schematic diagram) of Fig. 1;
Fig. 3 is structure and the operation principle schematic diagram thereof that improves the device of circulation in the riser endoparticle by cat head loopback wind of the present invention.
The specific embodiment
For example the present invention is done more detailed description below in conjunction with accompanying drawing:
The specific embodiment one: as shown in Figure 3, the described specific implementation process that improves the method that circulates in the riser endoparticle by cat head loopback wind of present embodiment is: step 1, introduce loopback wind in the restraining structure 1-1 place level at the top of riser 1, and loopback wind and riser 1 fan outlet 1-2 homonymy, and the wind speed of control loopback wind is 3-18m/s; Step 2, arrange one and be used for descending pipeline or the dividing plate 2 of backflow particle riser 1 is interior; Step 3, the particle that utilizes this loopback general mood to flow riser 1 top dependence restraining structure 1-1 separation carry downwards, send into riser 1 bottom through being used for descending pipeline or the dividing plate 2 of backflow particle.
The specific embodiment two: present embodiment is in step 1, and the mode that level is introduced loopback wind is: riser system fan exit gas is drawn deliver to the riser top.Loopback wind directly blows top restraining structure particle to descending structure, can realize loopback in the particle tower under the low energy consumption condition.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: present embodiment is in step 1, and the mode that level is introduced loopback wind is: adopt a small-sized fan or directly utilize on-the-spot strength to carry pressure-air, this air quantity is provided.Loopback wind directly blows top restraining structure particle to descending structure, can realize loopback in the particle tower under the low energy consumption condition.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment four: as shown in Figure 1, present embodiment is in step 1, and the wind speed of control loopback wind is 5-15m/s.Loopback wind directly blows top restraining structure particle to descending structure, can realize loopback in the particle tower under the low energy consumption condition.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment five: as shown in Figure 3, the isolated plant of the described realization said method of present embodiment comprises riser 1, the top of described riser 1 is restraining structure 1-1, the sidewall of described riser 1 is provided with fan outlet 1-2, be provided with a loopback air port 1-3 who communicates with restraining structure 1-1 at the top of riser 1 sidewall, loopback air port 1-3 is positioned at the same side that the top of fan outlet 1-2 and loopback air port 1-3 and fan outlet 1-2 are positioned at riser 1, in riser 1, be provided with for backflow particle descending pipeline or dividing plate 2, and describedly be oppositely arranged with loopback air port 1-3 for the descending pipeline of backflow particle or dividing plate 2.Apparatus structure of the present invention is simple, is easy to realize.
The principle of the invention is analyzed as follows:
Riser of the prior art top mobility status is as follows: gas flows out along Horizontal Exit after flowing to top exit, the part particle motion impetus that continues to keep up, beginning becomes petal-shaped diffusion to the tower body wall after running into top glass plate, such as Fig. 1, the particle of outlet side is taken away by horizontal gas flow, other particle of 3 falls after rise in the tower along the tower body wall, but its descending degree of depth is limited, is brought to again soon cat head.
The present invention draws riser system fan exit gas and delivers to the riser top, (also can increase by a small-sized fan or directly utilize on-the-spot strength to carry pressure-air, this air quantity is provided),, under the 3-18m/s condition, sent into by outlet side outlet opposition side level along the riser top at wind speed.Utilize this air-flow that the particle that the riser top relies on restraining structure to separate is carried, send into the riser bottom through descending pipeline (being used for descending pipeline or the dividing plate 2 of backflow particle), and then strengthen the inner loop effect of riser particle.
Top recyclegas flow is directly relevant with the tower body diameter: computational methods as shown in the formula:
In the formula:
Qz is total smoke treatment amount, Nm3/h;
R-is equivalent diameter, m;
α-correction factor is generally got 1-2, when the granule materials water capacity gets 1 less than 10% the time, when water capacity gets 1.5 less than 18% the time; Get 2 less than 22% the time;
ε-be empirical coefficient, generally get 0.2-0.4; When the loopback gas pressure selects higher value during less than 2000Pa; Desirable smaller value when loopback air lift pressure is higher than 2000Pa.
Claims (5)
1. one kind is passed through the device that cat head loopback wind improves circulation in the riser endoparticle, comprise riser, it is characterized in that: the top of described riser is restraining structure, the sidewall of described riser is provided with fan outlet, be provided with a loopback air port that communicates with restraining structure at the top of riser sidewall, the loopback air port is positioned at the same side that the top of fan outlet and loopback air port and fan outlet are positioned at riser, in riser, be provided with for backflow particle descending pipeline or dividing plate, and describedly be oppositely arranged for the descending pipeline of backflow particle or dividing plate and loopback air port.
2. a method that improves circulation in the riser endoparticle by cat head loopback wind is characterized in that: select the device that improves circulation in the riser endoparticle by cat head loopback wind as claimed in claim 1; Level is introduced loopback wind at the restraining structure place at the top of riser, and loopback general mood stream carries the particle that the riser top relies on restraining structure to separate downwards, sends into the riser bottom through being used for the descending pipeline of backflow particle or dividing plate.
3. according to claim 2 by the interior method that circulates of cat head loopback wind raising riser endoparticle, it is characterized in that: it is riser system fan exit gas to be drawn deliver to the riser top that described level is introduced loopback wind.
4. according to claim 2 by the interior method that circulates of cat head loopback wind raising riser endoparticle, it is characterized in that: it is to adopt a small-sized fan or directly utilize on-the-spot strength conveying pressure-air that wind regime is provided that described level is introduced loopback wind.
5. according to claim 2, the 3 or 4 described methods that improve circulation in the riser endoparticle by cat head loopback wind, it is characterized in that: the wind speed of control loopback wind is 10-15m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598455 CN102078782B (en) | 2010-12-21 | 2010-12-21 | Method and device for improving the internal circulation of particles in the riser through the return air at the top of the tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598455 CN102078782B (en) | 2010-12-21 | 2010-12-21 | Method and device for improving the internal circulation of particles in the riser through the return air at the top of the tower |
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| Publication Number | Publication Date |
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| CN102078782A CN102078782A (en) | 2011-06-01 |
| CN102078782B true CN102078782B (en) | 2013-02-06 |
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| CN 201010598455 Expired - Fee Related CN102078782B (en) | 2010-12-21 | 2010-12-21 | Method and device for improving the internal circulation of particles in the riser through the return air at the top of the tower |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001221405A (en) * | 2000-02-08 | 2001-08-17 | Mitsubishi Heavy Ind Ltd | Circulating type fluidized bed combustion furnace |
| CN2487738Y (en) * | 2001-06-29 | 2002-04-24 | 辽宁省能源研究所 | Partition board type internal circulation fluidized bed gasification furnace |
| CN2931477Y (en) * | 2006-07-31 | 2007-08-08 | 中国科学院广州能源研究所 | A clapboard type internal circulating fluidized bed gasifier with side air inlet |
-
2010
- 2010-12-21 CN CN 201010598455 patent/CN102078782B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001221405A (en) * | 2000-02-08 | 2001-08-17 | Mitsubishi Heavy Ind Ltd | Circulating type fluidized bed combustion furnace |
| CN2487738Y (en) * | 2001-06-29 | 2002-04-24 | 辽宁省能源研究所 | Partition board type internal circulation fluidized bed gasification furnace |
| CN2931477Y (en) * | 2006-07-31 | 2007-08-08 | 中国科学院广州能源研究所 | A clapboard type internal circulating fluidized bed gasifier with side air inlet |
Non-Patent Citations (1)
| Title |
|---|
| 党小庆等.《主要的烟气脱硫工艺》.《大气污染控制工程技术与实践》.2009, * |
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