CN201344751Y - Spiral-plate heat exchanger used for separating silane and ammonia in silane production - Google Patents
Spiral-plate heat exchanger used for separating silane and ammonia in silane production Download PDFInfo
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- CN201344751Y CN201344751Y CNU2009200380560U CN200920038056U CN201344751Y CN 201344751 Y CN201344751 Y CN 201344751Y CN U2009200380560 U CNU2009200380560 U CN U2009200380560U CN 200920038056 U CN200920038056 U CN 200920038056U CN 201344751 Y CN201344751 Y CN 201344751Y
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- silane
- heat exchanger
- ammonia
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Abstract
The utility model discloses a spiral-plate heat exchanger used for separating silane and ammonia in silane production, comprising a tank and a spiral plate; the spiral plate is formed by two metal plates, which are welded on a separation baffle and whirled into a spiral shape; the two metal plates form two spiral paths; the spiral plate is arranged in the middle section of the tank; the top and bottom of one spiral path are sealed; the bottom of the spiral path spiral centre is connected with a coolant inlet tube which extends to the outside of the tank; the upper end of the outer margin of the spiral path is connected with a coolant outlet tube, which is extends to the outside of the tank; the top and bottom of the other spiral path are opened and are communicated with each other; a gas mixture inlet tube is arranged at the bottom of the tank, and a silane gas outlet tube is arranged on the upper part of the tank. The utility model overcomes the defects that the existing spiral-plate heat exchanger can not be used for separating silane and ammonia in silane production by magnesium silicide method; not only the advantage of efficient heat exchange of the spiral-plate heat exchanger is fully used, but also the gravity is used for separating the liquid ammonia and gaseous silane.
Description
Technical field
The utility model relates to a kind of magnesium silicide method that is used for and produces the spiral-plate heat exchanger that silane silane separates with ammonia.
Technical background
The method of production of silane has multiple, as the non-homogenizing method of UCC, alloyage, halide reducing process etc.Wherein magnesium silicide method is a kind of of production of silane method, and it is as follows to adopt liquefied ammonia to make the reaction medium reaction equation:
Must at first separate with a large amount of ammonias of silane coexistence, the silane crude product carries out purifying by liquid nitrogen temperature rectifying or molecular sieve adsorption more then.The cryogenic separation technology of separating employing of silane and ammonia, what heat exchanger used in the cryogenic separation is tubular heat exchanger, be characterized in cleaning easily, gas and the liquid flow direction therein be for straight up and down, gas-liquid separation is simply easy, shortcoming is that the material heat-exchange time is short, heat exchange efficiency is low, can not feed the material of excessive bulk, causes heat exchange thoroughly not make ammonia be brought into down purification procedures one easily.Gas flow when silane separates with ammonia can not be big, seriously restricted the output of silane.
Existing spiral plate type and tubular heat exchanger introduction:
Tubular heat exchanger is a kind of heat exchanger most widely used on the present Chemical Manufacture.It mainly forms (see figure 1) by housing, tubulation, end socket, flange etc.Required material can adopt ordinary carbon steel, red copper or stainless steel to make respectively.When carrying out heat exchange, a kind of fluid is entered by the connecting piece place of end socket, flows in pipe, and from the outlet outflow of the end socket other end, this is referred to as tube side; One other fluid is entered by the adapter of housing, and another adapter from housing is flowed out, and this is called shell side.
In magnesium silicide method production silane process, separate with silane in order to make ammonia, the method for using cryogenic condensation to separate, what condenser used is exactly shell and tube.Because under the low temperature situation, because different (the silane boiling points-111.5 ℃ of the condensing temperature of silane and ammonia, ammonia-34.5 ℃), adopt cryogenic condensation that ammonia liquefaction is separated with silane, so shell and tube condenser is except the function of carrying out low-temperature heat exchange, also want ammonia is separated with silane, that is to say that heat exchange is not a purpose, its ammonia separates with silane and is only purpose.Utilize the tube side of single tube journey shell and tube condenser to walk silane mixture gas, shell is walked cooling medium, and silane and ammonia are in tube side and cooling medium heat exchange, and ammonia liquefaction back flows down along tube wall, silane is from the outflow suitable for reading of shell and tube condenser tube side, thereby reaches the purpose that ammonia separates with silane.That is to say, the tube side that utilizes shell and tube condenser is the design feature that leads directly to, tubulation at tube side is under the situation of plumbness, liquid is under gravitational effect, the characteristic that flows downward along tube wall, make through ammonia behind the condensing heat-exchange to become liquid state, and silane still is under the situation of gaseous state, to make ammonia and silane reach the purpose of separating.This is that magnesium silicide method is produced ammonia and the silane separation processes method that silane uses.
Existing spiral-plate heat exchanger is a kind of high-efficiency heat exchanger equipment, and medium is full counter-current flow in heat exchanger, and two media can obtain identical flow behavior.Be generally used for steam condensation, liquid evaporation heat transfer.Shown in Fig. 2,3, the design feature of existing spiral-plate heat exchanger: be welded on the separation baffles and be rolled into that screw type forms by two metallic plates, two metallic plates form two screw type passages in device, be welded with cover plate or end socket (see figure 2) respectively on top, bottom.Its characteristics: 1. heat transfer coefficient is big, can select higher flow velocity (liquid towards 2m/s gas is 20m/s) for use, fluid permissible velocity of flow in spiral plate is higher, and fluid flows along the hand of spiral, detention layer is thin, so heat transfer coefficient is big, and the heat transfer efficiency height, its heat transfer coefficient is about 2 times of tubular heat exchanger, and heat transfer efficiency is 3 times of tubular heat exchanger.Because of flow velocity is big, foul is difficult for being detained in addition.2. recyclable low temperature heat energy.3. heat loss is little.External surface area is little, flows out (going into) near the normal temperature fluid from edge gateway, can not need be incubated.4. self-cleaning dirt.Medium is walked single channel, and permissible velocity of flow is than other heat exchanger height, because flow rate of fluid is higher, the suspension in the fluid is difficult for depositing.5. compact conformation.The heat transfer area of unit volume is about 3 times of tubular heat exchanger, and for example a heat transfer area is about 100m
2Spiral-plate heat exchanger, its diameter and height only are about 1.3m and 1.4m, its volume only is the part of tubular heat exchanger.6. cheap.The spiral-plate heat exchanger installation cost of same technological requirement only is 1/2 to 1/3 of a spiral-plate heat exchanger.
Though existing spiral-plate heat exchanger is compared with tubular heat exchanger, and many advantages are arranged, the characteristics of silane by magnesium silicide method production are requirement silane and the separating of ammonia, and heat exchange is not a purpose.And the design feature of spiral-plate heat exchanger is two helical ducts, and two media is made counter-current flow.To the mode that adopts the gravity effect that liquid ammonia is separated with gaseous silane, obviously existing spiral-plate heat exchanger can not be accomplished.
Summary of the invention
Technical problem to be solved in the utility model, be existing spiral-plate heat exchanger is carried out architecture advances, a kind of spiral-plate heat exchanger that production of silane silane separates with ammonia that is used for is provided, produces and to carry out silane with spiral-plate heat exchanger in the silane and separate with ammonia to be implemented in magnesium silicide method.
Basic ideas are: take cooling medium to walk one of them helical duct, another passage upper and lower end face is not sealed and its charging aperture and discharging opening is closed, allow ammonia and silane enter from the spiral-plate heat exchanger bottom, walk upper and lower opening spiral plate axially, flow from bottom to top, flow out from heat exchanger top.Like this, the flow direction of ammonia and silane mixture gas just is not that screw flows, but carries out heat exchange from flowing between the plate that does not the weld seam of spiral plate from bottom to top.Through heat exchange, ammonia is converted into liquid state, flows downward along wooden partition from the top of spiral plate, and gaseous silane flows out from the top outlet.
The utility model is used for the spiral-plate heat exchanger that production of silane silane separates with ammonia, comprises tank body and spiral plate; Spiral plate is welded on the separation baffles by two metallic plates and is rolled into that screw type forms, and two metallic plates constitute two helical ducts; Spiral plate places the tank body stage casing; It is characterized in that: wherein, the top of a helical duct and bottom are for sealing, and the spiral center bottom termination refrigerating medium inlet pipe of this helical duct outside the logical tank body of refrigerating medium inlet pipe, is carried cryogen and gone out pipe on the outer rim of helical duct, and refrigerating medium goes out outside the logical tank body of pipe; The top of another helical duct and bottom are uncovered, up/down perforation; Tank base is provided with gaseous mixture inlet pipe (also being the liquefied ammonia outlet), and tank body top is established silane gas and gone out pipe.
The utility model, overcome existing spiral-plate heat exchanger and can not be used for the defective of separating that magnesium silicide method is produced silane silane and ammonia, both make full use of the characteristics of spiral-plate heat exchanger high efficient heat exchanging, accomplished the purpose of utilizing the gravity effect that liquid ammonia is separated with gaseous silane again.
Description of drawings
Fig. 1 is existing tubular heat exchanger structural representation;
Fig. 2 is existing spiral heat exchanger structural representation;
Fig. 3 is existing spiral heat exchanger spiral plate structural representation (overlooking);
Fig. 4 is that the utility model is used for the spiral-plate heat exchanger structural representation that production of silane silane separates with ammonia;
Fig. 5 is the spiral plate structural representation (overlooking) that the utility model is used for the spiral-plate heat exchanger that production of silane silane separates with ammonia.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Shown in Fig. 4,5, be used for the spiral-plate heat exchanger that production of silane silane separates with ammonia, comprise tank body 1 and spiral plate 2; Spiral plate is welded on the separation baffles 3 by two metallic plates and is rolled into that screw type forms, and two metallic plates constitute two helical ducts; Spiral plate places the tank body stage casing; Wherein, article one, the top of helical duct 10 and bottom are welded with cover plate or end socket 4 respectively, and the spiral center bottom termination refrigerating medium inlet pipe 5 of this helical duct is outside the logical tank body of refrigerating medium inlet pipe, the outer rim upper end of helical duct is carried cryogen and is gone out pipe 6, and refrigerating medium goes out outside the logical tank body of pipe; The top of another helical duct 11 and bottom are uncovered 7, up/down perforation; Tank base is provided with gaseous mixture inlet pipe 8 (also being the liquefied ammonia outlet), and tank body top is established silane gas and gone out pipe 9.During this equipment of actual fabrication,, make it become uncovered getting final product as long as the helical duct top of spiral plate of prior art and the cover plate or the end socket 4 of bottom are removed.
Produce in the silane at magnesium silicide method, take refrigerating medium (cooling medium) to walk helical duct 10, (as it is that existing spiral plate is transformed because helical duct 11 upper and lower end faces are not sealed, then with its inlet pipe and go out pipe and close), allow ammonia and silane mixture gas enter from the spiral-plate heat exchanger bottom, walk the axial of helical duct 11, flow from bottom to top, flow out from heat exchanger top.Like this, the flow direction of ammonia and silane mixture gas just is not that screw flows, but carries out heat exchange from flowing between the plate that does not the weld seam of spiral plate from bottom to top.Through heat exchange, ammonia is converted into liquid state, flows downward along wooden partition from the top of spiral plate, and gaseous silane flows out from the top outlet.
This spiral-plate heat exchanger can two serial connections, form the secondary heat exchange, and heat exchange efficiency is higher more thorough, under the situation of miscellaneous equipment, technology inconvenience, can improve the output of silane so that separating of silane and ammonia is more thorough.
Claims (1)
1, a kind ofly is used for the spiral-plate heat exchanger that production of silane silane separates with ammonia, comprises tank body (1) and spiral plate (2); Spiral plate is welded on a separation baffles (3) by two metallic plates and goes up and be rolled into that screw type forms, and two metallic plates constitute two helical ducts; Spiral plate places the tank body stage casing; It is characterized in that: wherein, article one, the top of helical duct and bottom are for sealing, and the spiral center bottom termination refrigerating medium inlet pipe (5) of this helical duct is outside the logical tank body of refrigerating medium inlet pipe, the outer rim upper end of helical duct is carried cryogen and is gone out pipe (6), and refrigerating medium goes out outside the logical tank body of pipe; The top of another helical duct and bottom are uncovered, up/down perforation; Tank base is provided with gaseous mixture inlet pipe (8), and tank body top is established silane gas and gone out pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200380560U CN201344751Y (en) | 2009-01-09 | 2009-01-09 | Spiral-plate heat exchanger used for separating silane and ammonia in silane production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200380560U CN201344751Y (en) | 2009-01-09 | 2009-01-09 | Spiral-plate heat exchanger used for separating silane and ammonia in silane production |
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| Publication Number | Publication Date |
|---|---|
| CN201344751Y true CN201344751Y (en) | 2009-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200380560U Expired - Fee Related CN201344751Y (en) | 2009-01-09 | 2009-01-09 | Spiral-plate heat exchanger used for separating silane and ammonia in silane production |
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| CN (1) | CN201344751Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494548A (en) * | 2011-12-13 | 2012-06-13 | 湘潭大学 | Plate type heat exchange device of surface water source heat pump |
| CN103743142A (en) * | 2014-01-21 | 2014-04-23 | 烟台富仕通上奇制冷设备有限公司 | Cooling system based on low-temperature refrigerant exchange station |
| CN105688430A (en) * | 2010-07-21 | 2016-06-22 | 阿奎巴克技术公司 | Distiller with scraper for film evaporation and wiper for removing deposit |
-
2009
- 2009-01-09 CN CNU2009200380560U patent/CN201344751Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688430A (en) * | 2010-07-21 | 2016-06-22 | 阿奎巴克技术公司 | Distiller with scraper for film evaporation and wiper for removing deposit |
| CN105688430B (en) * | 2010-07-21 | 2018-12-04 | 阿奎巴克技术公司 | Distiller with the applicator for thin film evaporation and the scaler for removing deposit |
| CN102494548A (en) * | 2011-12-13 | 2012-06-13 | 湘潭大学 | Plate type heat exchange device of surface water source heat pump |
| CN102494548B (en) * | 2011-12-13 | 2013-06-12 | 湘潭大学 | Plate type heat exchange device of surface water source heat pump |
| CN103743142A (en) * | 2014-01-21 | 2014-04-23 | 烟台富仕通上奇制冷设备有限公司 | Cooling system based on low-temperature refrigerant exchange station |
| CN103743142B (en) * | 2014-01-21 | 2015-11-04 | 烟台富仕通上奇制冷设备有限公司 | A kind of refrigeration system based on low temperature refrigerant switching station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20091111 Termination date: 20130109 |