CN204848284U - Cooling device and silicon tetrachloride hydrogenation system - Google Patents
Cooling device and silicon tetrachloride hydrogenation system Download PDFInfo
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- CN204848284U CN204848284U CN201520650276.4U CN201520650276U CN204848284U CN 204848284 U CN204848284 U CN 204848284U CN 201520650276 U CN201520650276 U CN 201520650276U CN 204848284 U CN204848284 U CN 204848284U
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Abstract
The utility model relates to a cooling device and silicon tetrachloride hydrogenation system relates to the cooling technique field, and main aim at improves cooling device's cooling efficiency, make the reaction gas of silicon tetrachloride hydrogenation system can be in the short time rapid cooling. The main technical scheme who adopts does: cooling device, including first water jacket and second water jacket, second water leg ways is established in the first water jacket, the outer wall of second water jacket with it has the open -ended and overflows the passageway to form both ends between the inner wall of first water jacket. The utility model discloses cooling device is applicable to silicon tetrachloride hydrogenation system etc.
Description
Technical field
The utility model relates to cooling technology field, particularly relates to a kind of refrigerating unit and hydrogenation of silicon tetrachloride system.
Background technology
The prevailing technology technology that production of polysilicon enterprise domestic at present adopts is improved Siemens.Improved Siemens is in the process of producing polysilicon, often produce 1 ton of polysilicon to generate there being the silicon tetrachloride as by-product of 14-20 ton, with the Cost and Benefit of current solar-grade polysilicon, silicon tetrachloride must obtain comparatively economic utilization, and production of polysilicon enterprise is commercially just competitive.Silicon tetrachloride is as harmful influence simultaneously, and chemical property is comparatively active, has stronger toxicity and danger, therefore needs ripe Controlling Technology technology, so that it is converted into trichlorosilane safely.Silicon tetrachloride high temperature hydrogenation technology is the silicon tetrachloride processing mode that current polysilicon enterprise generally adopts, and by this technology, this by product of silicon tetrachloride is reduced to the raw material trichlorosilane of polysilicon, thus the breakthrough realized on cost by a relatively large margin reduces.
Silicon tetrachloride high temperature hydrogenation is the silicon tetrachloride Land use systems of current main flow, the temperature of reaction that this technical requirements is higher, to improve the efficiency that converting silicon tetrachloride is trichlorosilane.The chemical equation of silicon tetrachloride high temperature hydrogenation is: SiCl
4+ H
4---SiHCl
4+ HCl, converting silicon tetrachloride is the reaction of trichlorosilane is reversible reaction, in order to ensure that above-mentioned reaction can be carried out towards positive dirction, requires to be reduced within 300 DEG C by about 1200 DEG C in the temperature of above-mentioned reaction is in 50ms.
This cooling requires higher to the requirement of refrigerating unit.At present, enterprise adopts common stainless steel tubular heat exchange mostly, and heat-eliminating medium uses 7 DEG C of water/ethylene glycol to lower the temperature, and this will ask reactant gases while having high flow velocities, and the tubulation length requirement of heat exchanger is longer, to ensure enough heat interchanging areas.Wherein, as shown in Figure 1, stainless steel tubular heat exchange comprises water jacket, water jacket comprises inner core 201 and urceolus 202, urceolus 202 is set on inner core 201, the two ends of inner core 201 and urceolus 202 are by connecting joint shutoff, and form circulating water channel between inner core 201 and urceolus 202, this circulating water channel has recirculated water entrance 203 and circulating water outlet 204.Specifically when implementing, water coolant enters in circulating water channel from recirculated water entrance 203, and flows out from circulating water outlet 204, reactant gases passes from the inner chamber of inner core 201, the contact internal walls of reactant gases and inner core 201, to carry out heat exchange, thus realizes the object of cooling.
State in realization in the process of technical scheme, contriver finds at least there is following defect in prior art: with common stainless steel tubulation as interchanger, with the method for cooling of 7 DEG C of water/ethylene glycol as heat-eliminating medium, because interchanger is individual layer heat exchange, its heat exchange efficiency is lower, fast cooling can not be realized in the short period of time, easily cause heat exchange failure.
Utility model content
In view of this, the utility model provides a kind of refrigerating unit and hydrogenation of silicon tetrachloride system, and main purpose is the cooling efficiency improving refrigerating unit, enables the reactant gases fast cooling in the short period of time of hydrogenation of silicon tetrachloride system.
For achieving the above object, the utility model mainly provides following technical scheme:
On the one hand, embodiment of the present utility model provides a kind of refrigerating unit, comprising:
First water jacket;
Second water jacket, is set in described first water jacket, forms the flow channels that two ends have opening between the outer wall of described second water jacket and the inwall of described first water jacket.
The purpose of this utility model and solve its technical problem and also can be applied to the following technical measures to achieve further.
Aforesaid refrigerating unit, wherein,
Described first water jacket comprises the first sub-water jacket and the second sub-water jacket, and one end of described first sub-water jacket is connected with one end of described second sub-water jacket;
Described second water jacket is set in described first sub-water jacket, and stretches in described second sub-water jacket;
One end stretched in described second sub-water jacket of described second water jacket is blind end;
The outer wall of described second water jacket and the flow channels described in jointly being formed between the inwall of described first sub-water jacket and the inwall of described second sub-water jacket.
Aforesaid refrigerating unit, wherein,
Described second sub-water jacket comprises water jacket horizontal part and water jacket vertical portion; One end of described water jacket horizontal part is connected with one end of described water jacket vertical portion;
One end of described first sub-water jacket is connected with the other end of described water jacket horizontal part;
Described second water jacket stretches in described water jacket horizontal part;
The outer wall of described second water jacket and the flow channels described in jointly being formed between the inwall of described first sub-water jacket and the inwall of described water jacket horizontal part.
Aforesaid refrigerating unit, wherein,
One end of described first sub-water jacket and the other end of described water jacket horizontal part by Flange joint, and are folded with teflon gasket between be connected two flanges.
Aforesaid refrigerating unit, wherein,
The bottom of the water circulation channel of described water jacket vertical portion is provided with relief port.
Aforesaid refrigerating unit, wherein,
Described first water jacket and described second water jacket are made by 316L stainless steel.
On the other hand, embodiment of the present utility model also provides a kind of hydrogenation of silicon tetrachloride system, comprising:
Refrigerating unit, described refrigerating unit is above-mentioned refrigerating unit described in any one;
Reactor, comprises reactor body and heating element, and described reactor body has inner chamber, and it is inner that described heating element is arranged on described reactor body; Described reactor body is provided with opening for feed and the offgas outlet of through inside;
Wherein, the offgas outlet end of described reactor body is connected with one end of the flow channels of described refrigerating unit, is communicated with the inside of described flow channels to make the inside of described reactor body.
By technique scheme, the utility model refrigerating unit and hydrogenation of silicon tetrachloride system at least have following beneficial effect:
In the technical scheme that the utility model embodiment provides, because the second water jacket is set in the first water jacket, jointly the flow channels that two ends have opening is formed between the outer wall of the second water jacket and the inwall of the first water jacket, when being filled with circulating cooling medium in the first water jacket and the second water jacket, high-temperature reacting gas in flow channels is between this two-layer heat-eliminating medium, relative to individual layer heat exchange method of the prior art, the heat exchange area of the double-deck heat exchange method that the technical program adopts is larger, thus make the cooling efficiency of the utility model refrigerating unit higher, and then enable the reactant gases of hydrogenation of silicon tetrachloride system realize fast cooling in the short period of time.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technique means of the present utility model, and can be implemented according to the content of specification sheets, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of water jacket that background technology provides;
Fig. 2 is the structural representation of a kind of refrigerating unit that an embodiment of the present utility model provides;
Fig. 3 is the structural representation of the another kind of refrigerating unit that an embodiment of the present utility model provides;
Fig. 4 is the structural representation of the another kind of refrigerating unit that an embodiment of the present utility model provides;
Fig. 5 is the structural representation of a kind of hydrogenation of silicon tetrachloride system that an embodiment of the present utility model provides.
Embodiment
For further setting forth the utility model for the technique means reaching predetermined utility model object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the embodiment of the utility model application, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
As shown in Figure 2, a kind of refrigerating unit 10 that an embodiment of the present utility model proposes, comprises the first water jacket 1 and the second water jacket 2.Second water jacket 2 is set in the first water jacket 1, forms the flow channels 3 that two ends have opening between the outer wall of the second water jacket 2 and the inwall of the first water jacket 1.Wherein, the both ends open of flow channels 3 can be respectively inlet mouth (not indicating in figure) and air outlet (not indicating in figure).
In the technical scheme that above-described embodiment provides, because the second water jacket 2 is set in the first water jacket 1, between the outer wall of the second water jacket 2 and the inwall of the first water jacket 1, jointly form the flow channels 3 that two ends have opening.Circulating cooling medium is filled with, such as water etc. in the first water jacket 1 and the second water jacket 2.The high-temperature tail gas that hydrogenation of silicon tetrachloride system response generates flows in this flow channels 3, this high-temperature tail gas is wrapped up by inside and outside two-layer water jacket, relative to individual layer heat exchange method of the prior art, the heat exchange area of the double-deck heat exchange method that the technical program adopts is larger, thus make the cooling efficiency of the utility model refrigerating unit 10 higher, and then enabling the reactant gases of hydrogenation of silicon tetrachloride system realize fast cooling in the short period of time, cooling performance is better.
Specifically when implementing, as shown in Figure 3, one end that aforesaid first water jacket 1 can comprise the first sub-water jacket 21 and the sub-water jacket 21 of the second sub-water jacket 22, first is connected with one end of the second sub-water jacket 22.Second water jacket 2 is set in the first sub-water jacket 21, and stretches in the second sub-water jacket 22.One end stretched in the second sub-water jacket 22 of second water jacket 2 is blind end, jointly forms aforesaid flow channels 3 between the inwall of the outer wall of the second water jacket 2 and the first sub-water jacket 21 and the inwall of the second sub-water jacket 22.In the present embodiment, because one end stretching into the second sub-water jacket 22 of the second water jacket 2 is blind end, when high-temperature tail gas flows into from the other end that the second sub-folder overlaps, can flow into smoothly in flow channels 3 and cool, and the inner chamber of the second water jacket 2 can not be flow into.Again because the first water jacket 1 is formed by connecting by multiple sub-folder cover, thus when the length of the first water jacket 1 is longer or structure hands over complicated, first water jacket 1 can be divided into the processing of multiple little sub-folder cover, then assemble, with the technique effect facilitating the first water jacket 1 to process.
From description above, as shown in Figure 4, aforesaid second sub-water jacket 22 can comprise water jacket horizontal part 221 and water jacket vertical portion 222.One end of water jacket horizontal part 221 is connected with one end of water jacket vertical portion 222.Second sub-water jacket 22 is concrete in use, and water jacket horizontal part 221 keeps horizontality, and water jacket vertical portion 222 keeps vertical state.One end of first sub-water jacket 21 is connected with the other end of water jacket horizontal part 221.Second water jacket 2 stretches in water jacket horizontal part 221.Jointly aforesaid flow channels 3 is formed between the inwall of the outer wall of the second water jacket 2 and the first sub-water jacket 21 and the inwall of water jacket horizontal part 221.
Specifically when implementing, as shown in Figure 4, aforementioned one end of first sub-water jacket 21 can be connected by flange 4 with the other end of water jacket horizontal part 221, and is folded with teflon gasket 5 between be connected two flanges 4.Teflon gasket 5 has excellent expansion character, thus make, between the first sub-water jacket 21 and water jacket horizontal part 221, there is certain stroke, expand with heat and contract with cold between the first sub-water jacket 21 and water jacket horizontal part 221 when can effectively prevent the cold and hot medium temperature difference larger and cause structural damage.In addition, because one end of the first sub-water jacket 21 is connected by flange 4 with the other end of water jacket horizontal part 221, thus for convenience detach and maintenance.
From description above, as shown in Figure 4, the bottom of the water circulation channel of aforementioned water jacket vertical portion 222 is provided with relief port 6.Because easily there is the phenomenon such as " short circuit " (having neither part nor lot in heat exchange), " dead band " (have neither part nor lot in heat exchange, substantially do not flow) of heat-eliminating medium in the water capacity of the bottom of the water circulation channel of water jacket vertical portion 222 simultaneously.Relief port 6 is set in the bottom of water circulation channel, enables the water at this place be in flow state, to improve the cooling performance of water jacket vertical portion 222, and then make the cooling performance of whole refrigerating unit 10 better.
Specifically when implementing, aforesaid first water jacket 1 and the second water jacket 2 can be made by 316L stainless steel.316L stainless steel has excellent corrosion resistance nature, makes the refrigerating unit 10 of the present embodiment can stand the corrosion of high-temperature tail gas.Certainly, in an alternative embodiment, aforesaid first water jacket 1 and the second water jacket 2 also can be made up of other corrosion resistant material.
Here it should be noted that: the refrigerating unit 10 of above-described embodiment goes for production of polysilicon enterprise, those skilled in the art is to be understood that, production of polysilicon enterprise is only example, and be not used in the technical scheme of the present embodiment is limited, need other material of rapid cooling (other industry) applicable equally.
As shown in Figure 5, embodiment of the present utility model also provides a kind of hydrogenation of silicon tetrachloride system, comprises refrigerating unit 10.Wherein, refrigerating unit, comprises the first water jacket and the second water jacket.Second water jacket is set in the first water jacket, forms the flow channels that two ends have opening between the outer wall of the second water jacket and the inwall of the first water jacket.
Here it should be noted that: refrigerating unit involved in the present embodiment can adopt described refrigerating unit 10 structure in above-described embodiment, and concrete realization and principle of work see the corresponding content in above-described embodiment, can repeat no more herein.
The hydrogenation of silicon tetrachloride system that above-described embodiment provides can also comprise reactor 7.Reactor 7 comprises reactor body 71 and heating element 72.Reactor body 71 has inner chamber, and it is inner that heating element 72 is arranged on reactor body 71.Reactor body 71 is provided with opening for feed 73 and the offgas outlet 74 of through inside.Wherein, the offgas outlet end of reactor body 71 is connected with one end of the flow channels 3 of refrigerating unit 10, is communicated with the inside of flow channels 3 to make the inside of reactor body 71.
In the above-described embodiments, can be added materials to reactor body 71 inside by opening for feed 73, such as silicon tetrachloride and hydrogen etc., heating element 72 pairs of reaction masses heat, chemical reaction is there is in reactor body 71 inside to make reaction mass, reacted high-temperature tail gas enters in flow channels 3 by offgas outlet 74, and high-temperature tail gas cools in flow channels 3, carries out all the time to enable reaction towards positive dirction.
Wherein, because above-mentioned refrigerating unit 10 adopts the mode of double-deck cold medium parcel high-temperature tail gas to dispel the heat, its cooling performance is better.This technical scheme can reduce energy consumption and improve the transformation efficiency of material.Be specially: 1, converting silicon tetrachloride is that the transformation efficiency of trichlorosilane can improve 1 percentage point; 2, converting silicon tetrachloride is the power consumption of trichlorosilane, and per kilogram can reduce 0.2kwh.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (7)
1. a refrigerating unit, is characterized in that, comprising:
First water jacket;
Second water jacket, is set in described first water jacket, forms the flow channels that two ends have opening between the outer wall of described second water jacket and the inwall of described first water jacket.
2. refrigerating unit as claimed in claim 1, is characterized in that,
Described first water jacket comprises the first sub-water jacket and the second sub-water jacket, and one end of described first sub-water jacket is connected with one end of described second sub-water jacket;
Described second water jacket is set in described first sub-water jacket, and stretches in described second sub-water jacket;
One end stretched in described second sub-water jacket of described second water jacket is blind end;
The outer wall of described second water jacket and the flow channels described in jointly being formed between the inwall of described first sub-water jacket and the inwall of described second sub-water jacket.
3. refrigerating unit as claimed in claim 2, is characterized in that,
Described second sub-water jacket comprises water jacket horizontal part and water jacket vertical portion; One end of described water jacket horizontal part is connected with one end of described water jacket vertical portion;
One end of described first sub-water jacket is connected with the other end of described water jacket horizontal part;
Described second water jacket stretches in described water jacket horizontal part;
The outer wall of described second water jacket and the flow channels described in jointly being formed between the inwall of described first sub-water jacket and the inwall of described water jacket horizontal part.
4. refrigerating unit as claimed in claim 3, is characterized in that,
One end of described first sub-water jacket and the other end of described water jacket horizontal part by Flange joint, and are folded with teflon gasket between be connected two flanges.
5. the refrigerating unit as described in claim 3 or 4, is characterized in that,
The bottom of the water circulation channel of described water jacket vertical portion is provided with relief port.
6. the refrigerating unit according to any one of Claims 1-4, is characterized in that,
Described first water jacket and described second water jacket are made by 316L stainless steel.
7. a hydrogenation of silicon tetrachloride system, is characterized in that, comprising:
Refrigerating unit, the refrigerating unit of described refrigerating unit according to any one of claim 1 to 6;
Reactor, comprises reactor body and heating element, and described reactor body has inner chamber, and it is inner that described heating element is arranged on described reactor body; Described reactor body is provided with opening for feed and the offgas outlet of through inside;
Wherein, the offgas outlet end of described reactor body is connected with one end of the flow channels of described refrigerating unit, is communicated with the inside of described flow channels to make the inside of described reactor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520650276.4U CN204848284U (en) | 2015-08-26 | 2015-08-26 | Cooling device and silicon tetrachloride hydrogenation system |
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|---|---|---|---|
| CN201520650276.4U CN204848284U (en) | 2015-08-26 | 2015-08-26 | Cooling device and silicon tetrachloride hydrogenation system |
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| CN204848284U true CN204848284U (en) | 2015-12-09 |
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| CN201520650276.4U Active CN204848284U (en) | 2015-08-26 | 2015-08-26 | Cooling device and silicon tetrachloride hydrogenation system |
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Address after: No. 16 Weiliu Road, New Chemical Materials Industrial Park, Shihezi Economic Development Zone, Xinjiang Uygur Autonomous Region, 832000 Patentee after: Xinjiang DAQO New Energy Co., Ltd. Address before: Weiliu Road, New Chemical Materials Industrial Park, Shihezi Economic Development Zone, Xinjiang Uygur Autonomous Region, 832000 Patentee before: Xinjiang Daqo New Energy Co.,Ltd. |