CN102910634A - Finger-type heat exchanger with triple-sleeve structure used in fluidized bed reactor for synthesizing trichlorosilane - Google Patents
Finger-type heat exchanger with triple-sleeve structure used in fluidized bed reactor for synthesizing trichlorosilane Download PDFInfo
- Publication number
- CN102910634A CN102910634A CN2012104259209A CN201210425920A CN102910634A CN 102910634 A CN102910634 A CN 102910634A CN 2012104259209 A CN2012104259209 A CN 2012104259209A CN 201210425920 A CN201210425920 A CN 201210425920A CN 102910634 A CN102910634 A CN 102910634A
- Authority
- CN
- China
- Prior art keywords
- finger
- fluidized bed
- trichlorosilane
- bed reactor
- type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to a finger-type heat exchanger with a triple-sleeve structure used in a fluidized bed reactor for synthesizing trichlorosilane, which comprises a heat conduction oil inlet, an upper heat exchange tube seal head, a heat exchange tube connection flange, a plurality of finger-type triple-sleeve heat exchange tubes, and a heat conduction oil outlet, wherein each finger-type triple-sleeve heat exchange tube consists of an inner tube, a liner tube and an outer tube that are sequentially arranged from inside to outside, the upper end and the lower end of an annular interstice space between each inner tube and each liner tube are closed, and each annular interstice space is vacuumed to form a vacuum isolated layer. The heat exchanger solves the problem that oil temperature rises greatly as heat conduction oil enters the annular interstice spaces between the inner tubes and the outer tubes from the inner tubes, the temperature of a fluidized bed can be distributed uniformly, the reaction is stable, and the utilization ratio and the product purity of silicon powder are higher.
Description
Technical field
The invention belongs to chemical industry equipment and technical field, be specifically related to a kind of for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor.
Background technology
At present, trichlorosilane is not only the main raw material of making polysilicon, or the important intermediate of synthesizing silane coupler and other organosilicon product.Because the global solar photovoltaic industry develops rapidly, the demand of polysilicon is increased sharply, cause trichlorosilane supply critical shortage.
Produce trichlorosilane both at home and abroad all take silica flour as raw material, carry out chlorination reaction with hydrogenchloride in fluidized-bed reactor, reaction product is again through separating, purifying, until be met the product of specification of quality.The technological temperature of synthesizing trichlorosilane is 320 ℃ ~ 350 ℃, and hydrogenchloride and silica flour building-up reactions speed and trichlorosilane yield are all higher under this temperature condition.Therefore, should the temperature in the trichlorosilane synthetic furnace be remained in 320 ℃ ~ 350 ℃ scopes as far as possible.But the building-up reactions of trichlorosilane is strong thermopositive reaction, and in the fluidized-bed bottom, because silica flour and hydrogen cloride concentration are higher, the thermal discharge of unit volume bed is large; And on fluidized-bed top, the thermal discharge of unit volume bed diminishes.This inequality heat release causes the temperature value fluctuation in the stove larger, makes synthetic trichlorosilane quality unstable.In order effectively to stablize temperature in the stove, must adopt temperature in the suitable heat exchange structure conditioned reaction device.Existing fluidized-bed reactor adopts the thimble tube interchanger mostly, and this structure can realize shifting out of heat by the circulation of thermal oil, and then synthesis reaction temperature in the conditioned reaction device.Because existing heat-exchanger rig is double-tube structure, when thermal oil arrives the bottom from the top of thimble tube interchanger inner tube, because stroke is long, and have obvious thermal exchange between the thermal oil of inner and outer pipes annular space rising, the thermal oil temperature is raise 8 ℃ ~ 10 ℃.When thermal oil enters the inner and outer pipes annular space from inner tube bottom, reduce with the heat transfer temperature difference of material in the fluidized-bed, move heat energy power and descend.
Summary of the invention
The present invention provides a kind of for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor for solving the problem in the present technology, and it is simple in structure, move heat energy power obviously increases.
The present invention is achieved by the following technical solutions:
The present invention is a kind of for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, and it comprises heat conductive oil inlet, heat transfer tube upper cover, heat transfer tube joint flange, several finger-type three sleeve heat exchange pipes and thermal oil outlet; Described heat conductive oil inlet is positioned at the top of finger-type interchanger, and its below is provided with heat transfer tube upper cover and heat transfer tube joint flange successively, is provided with the thermal oil outlet in the side of described heat transfer tube upper cover.
Described finger-type three sleeve heat exchange pipes are made of inner tube, bushing pipe and outer tube, and described inner tube, bushing pipe and outer tube are arranged successively from inside to outside; Closed at both ends about between described inner tube and bushing pipe annular space, and vacuumize formation vacuum interlayer.
Preferably, described for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, described inner tube, bushing pipe and outer tube are the concentric pipes of three covers.
Preferably, described for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, the vacuum compartment thickness that described inner tube and bushing pipe form is 2mm ~ 8mm.Optimum thickness is 5mm.
Preferably, described for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, the spacing of described outer tube wall and bushing pipe outer wall is 3mm ~ 50mm.Optimal spacing is 25mm.
Described for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, described finger-type three sleeve heat exchange pipes (4) evenly distribute.
Preferably, described finger-type three sleeve heat exchange pipes (4) are 7 ~ 40.
Preferred, described finger-type three sleeve heat exchange pipes are 19.
The present invention compared with prior art has following significant advantage:
1. increase liner tube structure simple, easy to manufacture;
2. temperature rise obviously reduced when thermal oil arrived the lower end by inner tube upper end, and heat transfer temperature difference strengthens, and moved heat energy power and strengthened, and can make that fluidized-bed temperature is evenly distributed, stable reaction, and silica flour utilization ratio and product purity all are improved.
Description of drawings
Fig. 1 is agent structure elevational schematic view of the present invention.
Fig. 2 is agent structure floor map of the present invention.
Fig. 3 is the local section enlarged diagram of I part among Fig. 1.
Each part description among the figure:
1, heat conductive oil inlet; 2, heat transfer tube upper cover; 3, heat transfer tube joint flange; 4, finger-type three sleeve heat exchange pipes; 5, thermal oil outlet; 6, inner tube; 7, bushing pipe; 8, outer tube.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is a kind of for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, and it comprises heat conductive oil inlet 1, heat transfer tube upper cover 2, heat transfer tube joint flange 3, several finger-type three sleeve heat exchange pipes 4 and thermal oil outlet 5; Described heat conductive oil inlet 1 is positioned at the top of finger-type interchanger, and its below is provided with heat transfer tube upper cover 2 and heat transfer tube joint flange 3 successively, is provided with thermal oil outlet 5 in the side of described heat transfer tube upper cover 2.
Described three sleeve heat exchange pipes 4 are made of inner tube 6, bushing pipe 7 and outer tube 8, and described inner tube 6, bushing pipe 7 and outer tube 8 are arranged successively from inside to outside; Closed at both ends about between described inner tube 6 and bushing pipe 7 annular spaces, and vacuumize formation vacuum interlayer.
Described inner tube 6, bushing pipe 7 and outer tube 8 are the concentric pipes of three covers.
The vacuum compartment thickness that described inner tube 6 and bushing pipe 7 form is 2mm ~ 8mm, and the best is 5mm.
The spacing of described outer tube 8 inwalls and bushing pipe 7 outer walls is 3mm ~ 50mm, and the best is 25mm.
Described finger-type three sleeve heat exchange pipes 4 evenly distribute.Described finger-type three sleeve heat exchange pipes 4 are 7 ~ 40, and the best is 19.
Referring to Fig. 1, Fig. 2, Fig. 3.
Fig. 1 is agent structure elevational schematic view of the present invention.
Fig. 2 is agent structure floor map of the present invention, the arrangement mode of finger-type three sleeve heat exchange pipes among the present invention as can be seen from Figure 2, finger-type three sleeve heat exchange pipes in the present embodiment evenly distribute, the neighboring can consist of regular hexagon, the trilateral that the finger-type three sleeve heat exchange pipes of the inside consist of is equilateral triangle, and angle as shown in Figure 2 is 60 degree.
Fig. 3 is the local section enlarged diagram of I part among Fig. 1.
In the present embodiment, finger-type three sleeve heat exchange pipes 4 are 19, as shown in Figure 2.
In use, after adding the finger-type interchanger with three-casing structure of the present invention in the trichlorosilane resultant current fluidized bed reactor, thermal oil reaches the bottom temperature rise and is reduced to 4 ℃ from inner tube top, uniformity of temperature profile in the bed, temperature can maintain 325 ± 3 ℃, and silica flour utilization ratio and product purity all are improved.
Claims (9)
1. one kind is used for the interior finger-type interchanger with three-casing structure of trichlorosilane resultant current fluidized bed reactor, it is characterized in that, it comprises heat conductive oil inlet (1), heat transfer tube upper cover (2), heat transfer tube joint flange (3), several finger-type three sleeve heat exchange pipes (4) and thermal oil outlet (5); Described heat conductive oil inlet (1) is positioned at the top of finger-type interchanger, and its below is provided with heat transfer tube upper cover (2) and heat transfer tube joint flange (3) successively, is provided with thermal oil outlet (5) in the side of described heat transfer tube upper cover (2);
Described three sleeve heat exchange pipes (4) are made of inner tube (6), bushing pipe (7) and outer tube (8), and described inner tube (6), bushing pipe (7) and outer tube (8) are arranged successively from inside to outside; Closed at both ends about between described inner tube (6) and bushing pipe (7) annular space, and vacuumize formation vacuum interlayer.
2. as claimed in claim 1ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, described inner tube (6), bushing pipe (7) and outer tube (8) are the concentric pipes of three covers.
3. as claimed in claim 1ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, the vacuum compartment thickness that described inner tube (6) and bushing pipe (7) form is 2mm ~ 8mm.
4. as claimed in claim 1ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, the vacuum compartment thickness that described inner tube (6) and bushing pipe (7) form is 5mm.
5. as claimed in claim 1ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, the spacing of described outer tube (8) inwall and bushing pipe (7) outer wall is 3mm ~ 50mm.
6. as claimed in claim 1ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, the spacing of the outer wall of the inwall of described outer tube (8) and bushing pipe (7) is 25mm.
7. as claimed in claim 1ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, described finger-type three sleeve heat exchange pipes (4) evenly distribute.
8. as claimed in claim 7ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, described finger-type three sleeve heat exchange pipes (4) are 7 ~ 40.
9. as claimed in claim 8ly it is characterized in that for the finger-type interchanger with three-casing structure in the trichlorosilane resultant current fluidized bed reactor, described finger-type three sleeve heat exchange pipes are 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210425920.9A CN102910634B (en) | 2012-10-30 | 2012-10-30 | A kind of for the finger-type heat exchanger with three-casing structure in trichlorosilane resultant current fluidized bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210425920.9A CN102910634B (en) | 2012-10-30 | 2012-10-30 | A kind of for the finger-type heat exchanger with three-casing structure in trichlorosilane resultant current fluidized bed reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102910634A true CN102910634A (en) | 2013-02-06 |
| CN102910634B CN102910634B (en) | 2016-06-15 |
Family
ID=47609245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210425920.9A Expired - Fee Related CN102910634B (en) | 2012-10-30 | 2012-10-30 | A kind of for the finger-type heat exchanger with three-casing structure in trichlorosilane resultant current fluidized bed reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102910634B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2081075U (en) * | 1990-10-18 | 1991-07-17 | 中国石油化工总公司 | Fast-cool heat-exchanger with big pipe diameter sleeve |
| CN1059963A (en) * | 1990-03-22 | 1992-04-01 | 阿莫尼·卡萨尔公司 | High-performance heat exchanger |
| CN2791576Y (en) * | 2005-05-16 | 2006-06-28 | 蒋瑾瑶 | Efficient heat exchange pipe |
| CN201614289U (en) * | 2010-01-22 | 2010-10-27 | 江苏福斯特石化装备有限公司 | Trichlorosilane synthetic furnace composite heat exchange structure |
-
2012
- 2012-10-30 CN CN201210425920.9A patent/CN102910634B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059963A (en) * | 1990-03-22 | 1992-04-01 | 阿莫尼·卡萨尔公司 | High-performance heat exchanger |
| CN2081075U (en) * | 1990-10-18 | 1991-07-17 | 中国石油化工总公司 | Fast-cool heat-exchanger with big pipe diameter sleeve |
| CN2791576Y (en) * | 2005-05-16 | 2006-06-28 | 蒋瑾瑶 | Efficient heat exchange pipe |
| CN201614289U (en) * | 2010-01-22 | 2010-10-27 | 江苏福斯特石化装备有限公司 | Trichlorosilane synthetic furnace composite heat exchange structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102910634B (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203971915U (en) | U-shaped pipe organosilicon fluidized bed reactor | |
| US20090155138A1 (en) | Apparatus for Producing Trichlorosilane | |
| CN201519571U (en) | Shell and tube reactor for producing chloroethylene by utilizing acetylene method | |
| WO2008053750A1 (en) | Trichlorosilane production apparatus | |
| JP5205906B2 (en) | Trichlorosilane production equipment | |
| WO2011123998A1 (en) | Reactor and corresponding system for polysilicon production | |
| CN207941495U (en) | A kind of shell and tube reactor with double helix baffle plate | |
| CN104368282B (en) | The water bed reactor of beam tube type | |
| CN102910634A (en) | Finger-type heat exchanger with triple-sleeve structure used in fluidized bed reactor for synthesizing trichlorosilane | |
| CN204656523U (en) | A kind of can in the reactor of external heat or cooling | |
| CN103292618A (en) | Heat exchanger | |
| CN206033258U (en) | Beam tube formula water bed moves heat recombination type CO converting means | |
| CN104722260A (en) | Reaction kettle | |
| CN210065673U (en) | Ultraviolet light catalytic reaction system for chlorinated paraffin production | |
| CN203625030U (en) | Combined type integrated graphite hydrogen chloride synthesis furnace | |
| CN203648501U (en) | Corrugated plate type uniform-temperature hydrogenation reactor | |
| CN201764862U (en) | High-temperature heat exchanger | |
| CN204122092U (en) | Thimble tube heat-exchanged reformer | |
| CN205392369U (en) | Organosilicon heat pipe fluidized bed reactor | |
| CN102674360B (en) | Heat insulation inner liner of energy-saving polycrystalline silicon reduction furnace provided with polycrystalline silicon slice, and implementation method thereof | |
| CN101922868B (en) | High temperature heat exchanger | |
| CN205462147U (en) | Diameter of axle is to isothermal reactor | |
| CN201551995U (en) | Trichlorosilane production fluid bed reactor for improving gas-solid contact time | |
| CN201614289U (en) | Trichlorosilane synthetic furnace composite heat exchange structure | |
| CN201678457U (en) | Heat transfer oil silicon chip jacking device for polycrystalline silicon decomposing furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20161030 |