CN202113846U - Liquid vaporization equipment with heat tracing jackets - Google Patents
Liquid vaporization equipment with heat tracing jackets Download PDFInfo
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- CN202113846U CN202113846U CN2011201325464U CN201120132546U CN202113846U CN 202113846 U CN202113846 U CN 202113846U CN 2011201325464 U CN2011201325464 U CN 2011201325464U CN 201120132546 U CN201120132546 U CN 201120132546U CN 202113846 U CN202113846 U CN 202113846U
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- atomizing lance
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Abstract
Liquid vaporization equipment with heat tracing jackets comprises a vaporizer shell (1), an atomizing spray gun (6) and a high-temperature gas distributor (15) inside the vaporizer shell (1). The atomizing spray gun (6) extends into the vaporizer shell (1), a gas-phase material outlet (3) is arranged on the top of the vaporizer shell (1), an access hole (2) is disposed at the bottom of the vaporizer shell (1), the atomizing spray gun (6) consists of a gun body and an atomizing spray nozzle, the gun body of the atomizing spray gun (6) is provided with a liquid inlet (7) and an atomizing gas inlet (8), a heat tracing water jacket (14) and/or a heat tracing gas jacket (13) are sequentially disposed on the outside of the gun body of the atomizing spray gun, the high-temperature gas distributor (15) is positioned below the atomizing spray nozzle, and a high-temperature gas inlet (4) is arranged at the other end of the high-temperature gas distributor. The liquid vaporization equipment can realize quick vaporization of heat-sensitive liquid, is particularly applicable to a vaporization process of cyclohexane oxime, and can prevent coking of the cyclohexane oxime in the vaporization process.
Description
Technical field
The utility model relates to a kind of vaporizing liquid equipment, more particularly, relates to a kind of cyclohexanone oxime vaporising device that is used for caprolactam technology.
Background technology
Epsilon-caprolactams (being designated hereinafter simply as caprolactam) is a primary raw material of producing polyamide fibre, industrial cord fabric thread and nylon engineering plastic three big series of products, and along with the continuous increase of domestic engineering plastics demand, its demand also is the trend that increases year by year.Cyclohexanone oxime Beckmann rearrangement explained hereafter caprolactam comprises two kinds of liquid phase method and vapor phase methods; Liquid phase method adopts the concentrated sulfuric acid or oleum as catalyst; Behind the catalysis of pimelinketone oxime generation Beckmann rearrangement; Use the acid in the ammonia neutralization reaction system again, generate caprolactam and accessory substance ammonium sulfate etc.It is the ammonium sulfate of a large amount of low value of by-product that liquid phase method is produced the maximum shortcoming of caprolactam technology, adopts sulfuric acid to cause equipment corrosion and serious environmental pollution as catalyst in addition.Vapor phase method as acidic catalyst, need not consume sulfuric acid with the molecular sieve of MFI structure in technical process, make the production process of caprolactam become green more, therefore receives extensive concern gradually.
Produce in the caprolactam technology at the cyclohexanone oxime gas phase beckmann rearrangement, cyclohexanone oxime must get into reactor with the gas phase form and participate in reaction.Because cyclohexanone oxime belongs to the height heat-sensitive substance, under normal pressure, the vapourizing temperature of cyclohexanone oxime is 208 ℃.In the gasification, side reactions such as polycondensation very easily do not occurred and the on-catalytic coking phenomenon takes place by the liquid phase cyclohexanone oxime of timely vaporization.Therefore the cyclohexanone oxime vaporization is one of key technology of gas phase beckmann rearrangement production caprolactam technology.The gasification method of the cyclohexanone oxime of document record mainly contains following several kinds.
US4268440 discloses a kind of cyclohexanone oxime gasification method, and wherein cyclohexanone oxime is under the environment of inert gas, to contact with inert particle such as silica sand through fluid bed to vaporize.This method still can not avoid a part of cyclohexanone oxime in fluid bed, to decompose or coking, causes in the cyclohexanone oxime vaporescence material consumption higher; The coking product blocks the bed passage, and bed pressure drop constantly increases, and need improve constantly the increase that the inlet pressure of inert gas is come balance fluid bed bed pressure drop, and it is bigger therefore to control difficulty; In addition, adopt the employed fluid unit complex structure of gasification method of fluid bed.
US4137263 discloses a kind of cyclohexanone oxime gasification method, and this method adopts falling film evaporator vaporization cyclohexanone oxime liquid, in absolute pressure is to make the cyclohexanone oxime vaporization under the condition of 1060 holders, and vapourizing temperature is controlled at below 170 ℃.This method is in the cyclohexanone oxime vaporescence, and the cyclohexanone oxime tar that has been heated produces, and need add complicated affiliated facility in order to remove tar, simultaneously tar can be on the surface of falling film evaporator knot carbon, reducing vaporization efficency also has the danger of stopping up evaporator pipeline.Because the cyclohexanone oxime material has high susceptibility to high temperature, often need take lower vapourizing temperature, thereby need follow-up temperature-rise period just can reach the needed reaction temperature of gas phase beckmann rearrangement.
Present disclosed cyclohexanone oxime vaporising device has forms such as traditional heat exchanger or fluid bed.This kind equipment all has the phenomenon of hot-spot.Cyclohexanone oxime liquid is heated hot-spot that inequality causes extremely easily and forms tar or coking in the vaporescence that is heated.Therefore press for a kind of quick, easy vaporising device of exploitation.
The utility model content
The purpose of the utility model provides a kind of vaporizing liquid equipment, is applied in the preparing process of caprolactam effectively to prevent cyclohexanone oxime coking in gasification.
The vaporizing liquid equipment that the utility model provides; Comprise that vaporizer shell 1, spout stretch into the atomizing lance 6 of vaporizer shell 1 inside and the high-temperature gas distributor 15 of vaporizer shell 1 inside; The top of vaporizer shell 1 is a steam (vapor) outlet 3, and the bottom is provided with access hole 2; Wherein, described atomizing lance 6 is made up of rifle body and atomizer, and atomizing lance 6 rifle bodies and liquid inlet opening 7 are communicated with atomization gas charging aperture 8, and atomizing lance rifle external sets gradually side het water's chuck 14 and/or companion's hot gas chuck 13; Described high-temperature gas distributor 15 is positioned under the atomizer, and the high-temperature gas distributor other end is a high-temperature gas inlet 4.
The beneficial effect of the vaporizing liquid equipment that the utility model provides is:
The vaporizing liquid equipment that the utility model provides is applicable to the cyclohexanone oxime vaporescence, in use, earlier the cyclohexanone oxime atomizing is droplet, contact with high-temperature gas then rapidly and vaporizes, and can effectively eliminate the cyclohexanone oxime coking of being heated.Because atomizing lance is provided with companion's hot gas chuck and side het water's chuck outward, can be used for the vaporescence at higher temperature and liquid under pressure.The vaporizing liquid equipment of the utility model is installed in the Cyclohexanone-Oxime Gas Phase Beckmann Rearrangement device, and cyclohexanone oxime vaporization back directly gets into catalyst bed reaction, and liquid conveying, vaporization, reaction three organically combine, and control easy.Can satisfy cyclohexanone oxime and be higher than 2000 holders (266KPa) at pressure, temperature is greater than 350 ℃ vaporization requirement.
Description of drawings
The vaporizing liquid device structure sketch map that Fig. 1 provides for the utility model;
Fig. 2 is a distribution of gas ring sketch map;
Wherein, 1-vaporizing liquid apparatus casing; The 2-access hole; 3-vaporization back gas vent; 4-high-temperature gas inlet; 5-atomizing lance supporting sleeve; The 6-atomizing lance; The 7-liquid inlet opening; 8-atomization gas inlet; 9-side het water inlet; 10-side het water outlet; 11-companion hot gas inlet; 12-accompanies heat outlet; 13-companion hot gas chuck; 14-side het water chuck; The 15-gas distribution ring; The 16-packing layer; The outlet of 17-high-temperature gas.
The specific embodiment
The vaporizing liquid equipment that the utility model provides; Comprise that vaporizer shell 1, spout stretch into the atomizing lance 6 of vaporizer shell 1 inside and the high-temperature gas distributor 4 of vaporizer shell 1 inside; The top of vaporizer shell 1 is a steam (vapor) outlet 3, and the bottom is provided with access hole 2; Wherein, Described atomizing lance 6 is made up of rifle body and atomizer; Atomizing lance 6 rifle bodies and liquid inlet opening 7 are communicated with gas charging aperture 8; Atomizing lance rifle external sets gradually side het water's chuck 14 and/or companion's hot gas chuck 13, and is provided with respectively that companion's hot gas inlet 11, outlet 12 and side het water enter the mouth 9, outlet 10; Described high-temperature gas distributor 15 is positioned under the atomizer, and high-temperature gas distributor 15 other ends are high-temperature gas inlet 4.
In the vaporizing liquid equipment that the utility model provides, preferably described atomizing lance 6 is fixedly mounted on vaporizer shell 1 wall through atomizing lance supporting sleeve 5.The atomizing lance supporting sleeve is set can makes the atomizing lance installing/dismounting more convenient, make operation, the maintenance more flexible.
In the vaporizing liquid equipment that the utility model provides, described atomizing lance can be twin spray gun, single fluid (pressure sending type) atomizing lance etc. for being the atomization plant of droplet with the cyclohexanone oxime atomization of liquid, and the utility model is not limited in this respect.Described atomizing lance basic structure comprises the body of a gun, nozzle, control assembly and other annexes etc.Liquid such as cyclohexanone oxime are introduced spray gun by liquid inlet 7, and gas is got in the spray gun 3 rifle bodies by gas access 8.It is droplet that high velocity air drives the cyclohexanone oxime atomization of liquid.
In the vaporizing liquid equipment that the utility model provides; Described atomizing lance 3 is preferably the twin spray gun; The twin spray gun is compared with single fluid atomizing lance (mechanical atomization); Owing to let liquid and atomization gas mix the back ejection, can obtain the drop more small than single fluid nozzle, wherein the high more particle diameter of the volume ratio of atomization gas and liquid just attenuates more.In addition, the nozzle diameter of two-fluid spray gun is bigger, so can avoid the foreign matter clogging.Twin is compared with simple single fluid atomizing, not only can realize the continuous control of fluid flow, satisfies the atomizing requirement under the different working conditions.The use of atomizing medium simultaneously can realize preventing the self-cleaning process of nozzle surface to be prone to coking material plug nozzle, causes the atomizing effect variation.
The twin spray gun is according to interactional different two kinds of exterior mixing and the internal-mixings that are divided into of liquid and atomization gas; Exterior mixing is that aerodynamic atomization liquid mainly carries out outside spout place or spout; Internal-mixing then before spout and after the local atomizing, is continuing to atomize through the spout injection.In the atomizing lance that the vaporizing liquid equipment that the utility model provides is adopted, more preferably internal-mixing double fluid atomizing lance, internal-mixing atomizing lance atomization gas consumption still less, atomization quality is better.
Internal-mixing gas atomization spray gun basically forms the biphase gas and liquid flow that mixes in the hybrid chamber downstream, and after the biphase gas and liquid flow process nozzle hybrid chamber atomizing, liquid is divided into discontinuous big drop.When biphase gas and liquid flow flows through shower nozzle, quickened suddenly, gas obtains very big speed; Form bigger gas-liquid speed difference, under the effect of aerodynamic force, liquid is drawn into thin liquid film or thinner brin rapidly; After leaving nozzle; These liquid films and brin overcome the surface tension and the viscous force of liquid under the atomization gas effect, finally realize atomizing.Adopt internal-mixing gas atomization spray gun, the liquid charging is sent into spray gun inside by outside conveying equipment, and in the rifle body and under the acting in conjunction of nozzle, the atomization of liquid is a fine droplet.
The vaporizing liquid equipment that the utility model provides, described high-temperature gas distributor 15 is any equipment that the high-temperature gas uniform distribution is sprayed into the vaporising device housing.The use of gas distributor not only can evenly disperse high temperature inert gas, and suitable change high-temperature gas ejection angle can be adjusted the effect that contacts with atomizing fluids.In the vaporizing liquid equipment that the utility model provides, described high-temperature gas distributor preferred construction is the form that high-temperature gas distributes ring.Described high-temperature gas distributes a kind of possibility structure of ring as shown in Figure 2; The high-temperature gas of annular distributes ring to be provided with high-temperature gas venthole 17; Evenly disperse around spray gun to guarantee high temperature inert gas; Can also adjust the position of opening on the air ring, improve the effect that contacts with atomizing fluids, accomplish vaporescence fast.
The vaporizing liquid equipment that the utility model provides; The part of atomizing lance rifle body outside the vaporising device housing is provided with side het water's chuck and/or companion's hot gas chuck; There is the side het water to enter the mouth and side het water's outlet on described side het water's chuck, companion's hot gas entrance and exit is set on described companion's hot gas chuck.Preferably at the external side het water's chuck that is provided with of atomizing lance rifle, side het water's chuck outside is provided with companion's hot gas chuck again, is respectively equipped with side het water's entrance and exit on described companion's thermal jacket, and companion's hot gas entrance and exit.Because the reaction temperature of cyclohexanone oxime gas phase beckmann rearrangement technology is 300 ℃-400 ℃, reaction pressure is 0-0.5MPa.Therefore after the vaporization of liquid phase cyclohexanone oxime the cyclohexanone oxime gas condition that need heat up and boost under react.Help the retaining ring hexanone oxime at the external side het water of setting of atomizing lance rifle and/or companion's hot gas chuck and be in a suitable temperature, keep the good feed flow state of cyclohexanone oxime.
The vaporizing liquid equipment that the utility model provides is built-in with packing layer.Packing layer can be random packing or wire mesh packing.The preferable alloy silk screen.Woven wire not only can filter out the small amount of solid particle that heat-sensitive substance produces in vaporescence, in addition, a large amount of gas materials through woven wire after flow velocity will become more even.As shown in Figure 1, on vaporizer top, export 3 places near gaseous phase materials, be provided with wire gauze filter 16.
The vaporizing liquid equipment that the utility model provides is applicable to the atomization process to the more sensitive liquid of heat.The vaporescence that is particularly useful for cyclohexanone oxime liquid is dispersed into a large amount of small drops through atomizing lance with the cyclohexanone oxime atomization of liquid earlier, contacts with the high temperature inert gas of introducing through the high-temperature gas distributor and realizes vaporescence.Cyclohexanone oxime charging after the atomizing has bigger surface area, has increased the alternate heat transfer area of gas-liquid greatly, has strengthened the heat transfer process of high-temperature medium and cyclohexanone oxime, to realize the cyclohexanone oxime instant vaporization.Vaporescence has shortened the transformation time of cyclohexanone oxime greatly fast, has suppressed the side reaction (like condensation course) of cyclohexanone oxime in vaporization, thereby has reduced the coking in the cyclohexanone oxime vaporization.Simultaneously, because fast vaporization, can avoid drop reassembling and weaken atomizing effect at the volley.
The vaporizing liquid equipment that the utility model provides in use, the vaporescence that relates to not with the wall Contact Evaporating, therefore can not occur thermo-responsive liquid for example cyclohexanone oxime in vaporescence, contact and the coking of appearance easily with hot wall.
The vaporizing liquid device interior that the utility model provides only comprises gas atomization spray gun and high-temperature gas distributor, and is simple in structure, is convenient to maintenance and repair.The preferred twin spray gun of the vaporizing liquid equipment that the utility model provides is in the presence of a large amount of gas atomization media, and at a high speed from the spray gun ejection, atomizing effect is better evenly, and mist droplet particle size can be regulated according to operating mode simultaneously.
The course of work of the vaporizing liquid equipment that the utility model provides is the example explanation with Fig. 1.The liquid charging with get in the vaporizing liquid apparatus casings 1 from liquid inlet 7 and atomization gas inlet 8 respectively as the inert gas of atomizing medium.Under the effect of gas, liquid charging atomizing is sprayed from atomizer 6 for droplet.High temperature gas medium gets into high-temperature gases from high-temperature gas inlet 4 and distributes ring, the ejection of the gas orifice 17 from the gas distributor 15, and ejection back high temperature gas medium and droplet touch instant vaporization.Liquid after the vaporization is kept the short time of staying in vaporising device housing 1, get into follow-up unit from gas vent 3 fast.
Specify the effect of the utility model below through embodiment, but therefore the utility model does not receive any restriction.
Embodiment
Embodiment explains the effect of the cyclohexanone oxime vaporising device that the utility model provides.
Shown in accompanying drawing 1, atomizing lance is provided with companion's hot gas chuck and side het water's chuck outward, and the temperature of companion's hot gas is 150 ℃, and side het water's temperature is 90 ℃.Cyclohexanone oxime is introduced in the vaporizer by liquid inlet opening, and inlet amount is 100Kg/h, and feeding temperature is 120 ℃, and feed pressure is 0.4MPa.Atomizing medium nitrogen is introduced by gas feed mouth 8, and flow is 37Nm
3/ h, pressure are 0.4MPa (absolute pressure), and mixed fluid gets into the gas atomizer cavity.Under the effect of nitrogen atomization medium, cyclohexanone oxime is atomized fast is droplet.High temperature nitrogen is introduced through the high-temperature gas inlet, introduces in the vaporizer through the high-temperature gas distributor, and nitrogen flow is 2092kg/h.The cyclohexanone oxime droplet contacts with 480 ℃ of high temperature nitrogen, instant vaporization, and vaporization back temperature is 431 ℃.Cyclohexanone oxime gas after the vaporization is drawn vaporizing liquid equipment through gas vent, gets into reactor.Vaporizer operation 700 hours does not have obvious coking phenomenon in the vaporizer.
Comparative Examples
Cyclohexanone oxime vaporization effect in the Comparative Examples explanation prior art.
The vaporizing liquid equipment that cyclohexanone oxime provides without the utility model, directly with the hot nitrogen Contact Evaporating after the reaction bed of entering reactor.The inlet amount of cyclohexanone oxime is 100kg/h, and feed pressure is 0.4MPa; The hot nitrogen injection rate is 2092kg/h.Vapourizing temperature is 431 ℃.Turned round 50 hours, and the obvious coking phenomenon of appearance was arranged, bulky grain knot carbon occurs at bottom of vaporizing chamber.
Claims (5)
1. one kind has the vaporizing liquid equipment of accompanying thermal jacket; Comprise that vaporizer shell (1), spout stretch into inner atomizing lance (6) of vaporizer shell (1) and the inner high-temperature gas distributor (15) of vaporizer shell (1); The top of vaporizer shell (1) is steam (vapor) outlet (3), and the bottom is provided with access hole (2); Wherein, described atomizing lance (6) is made up of rifle body and atomizer, and atomizing lance (6) rifle body and liquid inlet opening (7) and atomization gas charging aperture (8) are communicated with, and atomizing lance rifle external sets gradually side het water's chuck (14) and/or companion's hot gas chuck (13); Described high-temperature gas distributor (15) is positioned under the atomizer, and the high-temperature gas distributor other end is a high-temperature gas inlet (4).
2. according to the vaporizing liquid equipment of claim 1, it is characterized in that described atomizing lance (6) is fixedly mounted on vaporizer shell (1) sidewall through atomizing lance supporting sleeve (5).
3. according to the vaporizing liquid equipment of claim 1 or 2, it is characterized in that described atomizing lance is the twin spray gun.
4. according to the vaporizing liquid equipment of claim 3, it is characterized in that described atomizing lance (3) is an internal-mixing twin spray gun.
5. according to the vaporizing liquid equipment of claim 1 or 2, it is characterized in that described gas distributor (15) is the distribution of gas ring type structure, have the high-temperature gas outlet on the distribution of gas ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201325464U CN202113846U (en) | 2011-04-29 | 2011-04-29 | Liquid vaporization equipment with heat tracing jackets |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201325464U CN202113846U (en) | 2011-04-29 | 2011-04-29 | Liquid vaporization equipment with heat tracing jackets |
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| CN202113846U true CN202113846U (en) | 2012-01-18 |
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| CN2011201325464U Expired - Lifetime CN202113846U (en) | 2011-04-29 | 2011-04-29 | Liquid vaporization equipment with heat tracing jackets |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103301785A (en) * | 2012-03-16 | 2013-09-18 | 中国石油化工股份有限公司 | Gas phase catalytic reaction method as well as moving-bed reactor and applications thereof |
| CN107421166A (en) * | 2017-06-25 | 2017-12-01 | 德州亚太集团有限公司 | A kind of nozzle falling film evaporator |
| CN113559531A (en) * | 2020-04-28 | 2021-10-29 | 惠生工程（中国）有限公司 | Vaporization device and method suitable for high boiling point substance in low superheat degree environment |
-
2011
- 2011-04-29 CN CN2011201325464U patent/CN202113846U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103301785A (en) * | 2012-03-16 | 2013-09-18 | 中国石油化工股份有限公司 | Gas phase catalytic reaction method as well as moving-bed reactor and applications thereof |
| CN103301785B (en) * | 2012-03-16 | 2016-01-20 | 中国石油化工股份有限公司 | A kind of gas phase catalytic reaction method and moving-burden bed reactor and application thereof |
| CN107421166A (en) * | 2017-06-25 | 2017-12-01 | 德州亚太集团有限公司 | A kind of nozzle falling film evaporator |
| CN107421166B (en) * | 2017-06-25 | 2023-06-13 | 德州亚太集团有限公司 | Nozzle falling film evaporator |
| CN113559531A (en) * | 2020-04-28 | 2021-10-29 | 惠生工程（中国）有限公司 | Vaporization device and method suitable for high boiling point substance in low superheat degree environment |
| CN113559531B (en) * | 2020-04-28 | 2023-09-29 | 惠生工程（中国）有限公司 | Vaporization device and method suitable for high boiling point substance in low superheat degree environment |
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| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20120118 |