CN202892942U - Evaporator structure of distillation still - Google Patents
Evaporator structure of distillation still Download PDFInfo
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- CN202892942U CN202892942U CN 201220617582 CN201220617582U CN202892942U CN 202892942 U CN202892942 U CN 202892942U CN 201220617582 CN201220617582 CN 201220617582 CN 201220617582 U CN201220617582 U CN 201220617582U CN 202892942 U CN202892942 U CN 202892942U
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- BJAJDJDODCWPNS-UHFFFAOYSA-N dotp Chemical compound O=C1N2CCOC2=NC2=C1SC=C2 BJAJDJDODCWPNS-UHFFFAOYSA-N 0.000 abstract description 19
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to an evaporator structure of a distillation still. The evaporator structure is characterized in that an evaporator, an evaporation chamber and a sedimentation chamber are arranged inside a distillation still body; the evaporation chamber is arranged above the evaporator; the sedimentation chamber is arranged below the evaporator; an upper head communicated with the inside of the still body is arranged at the top of the still body and is provided with a gas phase opening; a discharge opening is arranged at the bottom of the sedimentation chamber; the evaporator comprises a plurality of first heating tubes arranged along a first direction and a plurality of second heating tubes arranged along a second direction vertical to the first direction; the two ends of the horizontally arranged heating tubes are respectively jointed with the side walls of the still body hermetically; and holes formed on the two ends of each heating tube are formed on the side walls of the still body. The evaporator structure has the advantage that the key technical problems in the process of preparing DOTP (dioctyl terephthalate) from PTA (pure terephthalic acid) wastes in large-scale industrial production are solved through the innovative heating, punching preventing and demisting structure design.
Description
Technical field
The utility model relates to technical field of chemical, relates in particular to a kind of evaporation structure that is applicable to utilize the distillation still that the prepared DOTP (DOTP) of trade waste be rich in terephthalic acid (TPA) (PTA) purifies.
Background technology
Plasticizer is for increasing its plasticity, flowability and making finished product have the material that pliability adds when processing high polymer (such as rubber, plastics, coating etc.) moulding.DOTP (DOTP) is a kind of main plastic plasticizer of function admirable, except plasticizing capacity a little less than the dioctyl phthalate (DOP), volatility, specific insulation, and the aspect such as the compatibility of PVC and heatproof weatherability more superior, and toxicity is significantly less than DOP.DOTP is mainly used in 70 ℃ of CABLE MATERIALS of heatproof, and because its volatility is low, use contains quantitative DOTP and can satisfy the requirement of wire cable material temperature resistant grade fully, reaches IEC (IEC), is used as first-selected plasticizer and uses in PVC plastic cable sheath.Its plasticizer that also can be used as other plastics uses, artificial leather film for example, nitrile rubber, cellulose nitrate, polyvinyl butyral etc.In addition, DOTP all has application at paint, paper, lubricant, bidirectional thin, blood plasma poly-bag and handicraft, and prospect is very wide.
Suitability for industrialized production DOTP mainly adopts raw material terephthalic acid (TPA) (PTA) and the preparation of 2-Ethylhexyl Alcohol (isooctanol, octanol) esterification at present.Raw material PTA is the lower end product of petrochemical industry, is a kind of comparatively expensive industrial chemicals, and the DOTP price that this preparation method produces is higher.
In addition, the at present application of PTA is more concentrated, and the PTA more than 90% is for the production of PETG (terylene) in the world.In the production process of terylene, can produce a large amount of discarded objects, those discarded objects enter in the wastewater disposal basin after the peracid dissolving, form the biosolid waste (being designated hereinafter simply as the PTA waste material) that is rich in PTA.These PTA waste materials are difficult to degraded, and as not processing the impact that can cause on the mankind's living environment very severe, processing then needs to drop into a large amount of funds, has increased the production cost of enterprise.
The scheme that exists in the prior art some to utilize above-mentioned PTA waste material to synthesize DOTP; adopt scheme that the PTA waste material prepares DOTO not only raw material be easy to get; simultaneously can digest refuses a large amount of in the industrial production; turn waste into wealth; reduced production cost; but also protection of the environment, be current comparatively rationally and one of the approach of the high recycling of economic benefit.
The scheme that a kind of feasible PTA waste material prepares DOTO be after the PTA that will reclaim purifies through alkalization elimination impurity again acidifying drying to generate purer PTA, and then with the synthetic DOTP plasticizer of original technique, the pre-treatment step of this scheme is various, cost is higher, and owing to the multistep processing has reduced final yield.
In addition, interimly disclosed a kind of " reclaiming the new technology that PTA produces the cable plasticizer " in 2010 05 at public publication publication " living beings Chemical Engineering ", this industrial design concept is the PTA waste material to be carried out after the preliminary treatment dehydration directly and octanol reacts, and will react more afterwards the generation product and carry out purifying products acquisition DOTP.Adopt this technique can avoid all multi-steps such as the purified alkalization that brings of raw material, purification, acidifying, drying, the separation of all impurity is all removed in purifying products, the technical process step that this method is produced DOTP is few, easy to operate, be easy to produce, and product quality is good.
But above-mentioned technique only in the laboratory by experiment vessel carry out operational processes, in the suitability for industrialized production preparation process of reality, need to use distillation still and carry out distilation, distillation still comprises the kettle of pot type, be provided with heat(ing) coil in the described kettle, during work pending material is introduced in the kettle, heated by described heat(ing) coil, thereby reach the purpose of distillation.But common terylene manufacturer produces the PTA waste material and processes as chemical industry rubbish, and for saving processing cost, most producer employs the environmental protection company that processes chemical industry rubbish on behalf of disposal, therefore actual obtainable PTA waste material composition complex not only in the suitability for industrialized production, and be rich in a large amount of solid matters such as silt.The reaction that existing distillation still structure can't be used for this PTA waste material and octanol generates the distillation processing of product, so need to improve to realize above-mentioned preparation scheme for the structure of existing distillation still.
The utility model content
The purpose of the utility model embodiment is for the structural blank of prior art, proposes a kind of distillation still that is applicable to utilize the prepared DOTP purification of PTA waste material.
In order to reach above-mentioned utility model purpose, the evaporation structure of a kind of distillation still that the utility model embodiment proposes is achieved through the following technical solutions:
A kind of evaporation structure of distillation still, related distillation still kettle inside has evaporimeter, be positioned at the vaporization chamber of described evaporimeter top and the mud chamber that is positioned at described evaporimeter below, be provided with a upper cover with described kettle internal communication on the described kettle top, offer gas phase mouth on the described upper cover, bottom, described mud chamber is provided with discharge gate, it is characterized in that: described evaporimeter comprises many second heating tubes that arrange with the second direction perpendicular to described first direction along the first heating tube and the Duo Gen of first direction setting, the two ends of those horizontally disposed heating tubes respectively with the sidewall sealed engagement of described kettle, offer the perforate that makes each heating tube both ends open open on the sidewall of described kettle; The sidewall of described kettle is outside equipped with a diffluence room and that is communicated with by all the first heating tubes chamber of confluxing, and by a diffluence room and the chamber of confluxing that all second heating tubes are communicated with, offer at least one in described conflux chamber and the diffluence room for the interface of heat transferring medium circulation.
Interval between any two adjacent described the first heating tubes is not less than the external diameter of described the first heating tube; Interval between any two adjacent described the second heating tubes is not less than the external diameter of described the second heating tube.
The 1.5-2 that is spaced apart described the first heating tube external diameter between any two adjacent described the first heating tubes doubly; The 1.5-2 that is spaced apart described the second heating tube external diameter between any two adjacent described the second heating tubes doubly.
Described the first heating tube all is positioned at the top of the second heating tube.
Described the first heating tube and the second heating tube are evenly distributed respectively.
Interface on the described chamber of confluxing is lower than its internal openings setting, the zone line setting of a plurality of perforates of corresponding its inside of the interface in the described diffluence room.
All offer two described interfaces in described conflux chamber and the diffluence room.
Compared with prior art, the beneficial effects of the utility model are: evaporation structure design by novelty has solved PTA waste material in the large-scale industrial production and has prepared key technical problem among the DOTP.The distillation still that proposes in the technical program is applicable to octanol and only processes through alkalization, the distillation of reaction product of PTA waste material behind the drying and processing, is implemented in the operation of extracting DOTP in the suitability for industrialized production in the distillation of complex mixture.It is more easy and economical that the production technology of utilizing this distillation still is processed first the method for synthesizing afterwards at present, and the product properties all meets the requirement of use, for the development of DOTP provides new approach.
Description of drawings
By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.
Fig. 1 is the utility model embodiment distillation still structural representation;
Fig. 2 is that the present embodiment distillation still is looked up structural representation;
Fig. 3 is present embodiment distillation still demister top view;
Fig. 4 is present embodiment distillation still demister structural representation;
Fig. 5 is the structural representation of monolithic ripple net sheet in the present embodiment demister.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail, so that technical staff's of the same trade understanding:
Shown in Fig. 1-5, label represents respectively:
Kettle cover 1, demister 2, anti-overflow hat 3, anti-overflow ring 4, communication port 5, the first heating tube 6, the chamber 7 of confluxing, mud chamber 8, drainage conduit 9, heating jacket 10, diffluence room 11, observation window 12, manhole 13, vaporization chamber 14, leg 15, gas phase mouth 16, tube connector 17, the second heating tube 18, upper cover 19, ripple net sheet 20, housing 21;
Hot oil inlet: a1, a2, a3, a4, a10;
Hot oil outlet: a5, a6, a7, a8, a9;
Temperature-measuring port: c1, c2.
Shown in Fig. 1-2, a kind of distillation still that is applicable to utilize the prepared DOTP purification of PTA waste material is provided in the present embodiment, just as described in the background art, owing to enter composition complex in the liquid-solid mixed stocker in the distillation still, even the PTA waste material of institute of same producer output also can produce certain otherness.Cannot also there is no need in this case to carry out qualitative processing for itself and the reacted product of octanol.Just because of this, for the various performances of distillation still strict requirement has been proposed, for example:
Because high boiling product complicated component in the liquid-solid mixed stocker is therefore much higher than existing distillation still for the required precision of the temperature in the distillation still, the slightly poor purity of cut that will cause of its temperature difference control is inadequate.
Because this liquid-solid mixed stocker solid impurity is more, be very easy to deposition or fouling on evaporimeter in still when using conventional distillation still, and then cause the coefficient of overall heat transmission to reduce, temperature in the kettle descends, and the distillation amount reduces in the unit interval, is forced to frequent maintenance cleaning.
Same because the complicated component of liquid-solid mixed stocker, raw material reaction speed has sizable fluctuation after causing heating, even exothermic heat of reaction between the part composition, cause temperature in the kettle pressure sharply to rise, therefore in case control the improper accident that will cause material to go out.
Just for these reasons, the distillation still that provides in the present embodiment mainly is made of kettle, upper cover 19, heater, erosion control materials device and demister 2, and wherein heater comprises that evaporimeter and mud chamber's heater consist of.Below will the design feature of said modules be described in detail:
Kettle mainly is comprised of three parts: columned kettle body, be located at the still top of kettle body upper end and arrange at the bottom of the still of kettle body lower end, all be the semiellipsoid shape at the bottom of still top and the still, and and the kettle combination enclose and consist of a space of distilling for heating material.Kettle inside is provided with the evaporimeter that arranges near upper limb at the bottom of the still, and the still space that is positioned at described evaporimeter top consists of vaporization chamber 14, and the still space that is positioned at described evaporimeter below consists of mud chamber 8.The shape of mud chamber 8 is defined by described still Bottom Shape, and the bottom of mud chamber 8 offers discharge gate 9, and the high boiling component after being used for distilling is discharged.
The upper cover 19 coaxial tops that are arranged on described still top, and cylindrical, and the lower ending opening of upper cover 19 is communicated with the kettle inner space, expands around the upper end open end to be set as flange.Be equipped with kettle cover 1 on this upper end open end, similarly be formed with the flange that matches for upper cover 19 flanges around the kettle cover 1.Syndeton between kettle cover 1 and the upper cover 19 as shown in Figure 1, be hinged with a pivoted arm 22 that rotates along vertical plane on the sidewall of upper cover 19, this pivoted arm 22 is roughly L-shaped, its transverse arm is pivoted in the primary importance of upper cover 19 sides with between the second place directly over the upper cover 19, and offers screw on the end of this transverse arm (the namely free end of pivoted arm 22).When pivoted arm 22 turns to the second place, the vertical also axis of corresponding described upper cover 19 that arranges of this screw.The center of kettle cover 1 upper surface is vertically installed with screw rod 22, and the screw on the pivoted arm 22 is set on the screw rod 22 and threaded engagement with it.When needs are closed the opening of upper cover 19, pivoted arm 22 is turned to second place place, this moment kettle cover 1 just be positioned at upper cover 19 upper end open directly over, handwheel, handle, spanner etc. are provided in screw rod 22 upper ends, and drive screw 22 rotates and kettle cover 1 is pressed down with upper cover 19 flanges fit tightly the sealing assembling that can finish kettle cover 1.And the mode of opening kettle cover 1 is just opposite with above-mentioned steps.In addition, also be provided with gas phase mouth 16 on the tube wall of upper cover 19, be used for the cut of output gas phase and be delivered to condenser by tube connector 17.
Evaporimeter comprises many second heating tubes 18 that arrange with the second direction perpendicular to described first direction along the first heating tube 6 and the Duo Gen of first direction setting, described the first heating tube 6 all is positioned at the top of described the second heating tube 18, and described many first heating tubes 6 and Duo Gen the second heating tube 18 is evenly distributed respectively.Those heating tubes (only distributing position is different with angle with the second heating tube 18 owing to the first heating tube 6, therefore the two is referred to as heating tube herein) the only mode with level arrange.The two ends of those heating tubes respectively with the sidewall sealed engagement of described kettle body, and offer the perforate that makes each heating tube both ends open open on the sidewall of described kettle body.In addition, the sidewall of described kettle body is outside equipped with a diffluence room 11 and the chamber 7 of confluxing that is communicated with by all the first heating tubes 6, and a diffluence room 11 and the chamber 7 of confluxing of being communicated with by all second heating tubes 18.All offer two for the interface of heat transferring medium (being deep fat in the present embodiment) circulation in these two conflux chamber 7 and two diffluence room 11.Can be referring to shown in Fig. 1-2, be communicated with in the diffluence room 11 of the first heating tube 6 and be hot oil inlet a3 and hot oil inlet a4, be communicated with on the chamber 7 of confluxing of the first heating tube 6 and be hot oil outlet a7 and hot oil outlet a8; Be communicated with and be hot oil inlet a1 and hot oil inlet a2 in the diffluence room 11 of the second heating tube 18, be communicated with on the chamber 7 of confluxing of the second heating tube 18 and be hot oil outlet a5 and hot oil outlet a6.
Form suitable logistics heating space for guaranteeing that heating tube is outer, and make this heating space have suitable circulation and turbulent flow, to guarantee the even and less scaling of heating, those heating tubes have following characteristic:
Interval between any two adjacent described the first heating tubes 6 is not less than the external diameter of described the first heating tube 6; Interval between any two adjacent described the second heating tubes 18 is not less than the external diameter of described the second heating tube 18.Preferably, the first heating tube 6 has identical external diameter with the second heating tube 18, and is spaced apart described the first heating tube 6 external diameters between any two adjacent described the first heating tubes 6; The 1.5-2 that is spaced apart described the second heating tube 18 external diameters between any two adjacent described the second heating tubes 18 doubly.
In addition, the hot oil outlet on the described chamber 7 of confluxing should be lower than its internal openings setting, namely is lower than the heating tube setting, the zone line setting of a plurality of perforates of corresponding its inside of the hot oil inlet in the described diffluence room 11.
Mud chamber's heater is the heating jacket 10 that arranges outside autoclave body bottom, heating chamber on these heating jacket 10 interior formation cover at the bottom of the described still, offer the hot oil inlet 10 and the hot oil outlet 9 that flow into and flow out described heating chamber for deep fat on the described heating jacket 10, hot oil inlet 10 and hot oil outlet 9 lay respectively at the both sides of heating jacket 10, and hot oil inlet 10 is formed on the top of heating jacket 10, and hot oil outlet 9 is formed on the bottom of heating jacket 10.
Shown in Fig. 3-4, described net sheet group is by a plurality of stacked ripple net sheets 20 with crest and trough and hold the housing 21 of fixing those ripple net sheets 20 and consist of successively from top to bottom.In the described net sheet group, should have 60 ° to 120 ° angle between the crest bearing of trend of any two adjacent corrugations net sheets 20.Preferably, the angle that has 90 ° or 75 ° between the crest bearing of trend of any two adjacent corrugations net sheets 20.The section of described ripple net sheet 20 is sine curve shape (referring to Fig. 4) or polyline shaped.Shown in 5, the pitch of waves D of described ripple net sheet 20 should be 3 to 6 times of its peak height h.
Three networking sheet groups from top to bottom overlapping arrangement and have each other the interval.Net sheet group is that horizontally disposed leg 15 fixes on the inwall by described upper cover 19 tube walls, and the outer rim of net sheet group supports by described leg 15, and is for convenience detach to carry out maintenance of clean-up for demister 2 with this.
The erosion control materials device consists of by being located at anti-overflow ring 4 and anti-overflow hat 3 in the kettle, that be positioned at described evaporimeter top.Wherein, described anti-overflow ring 4 is the annulus that arranges continuously on the described inner wall of kettle, wherein is formed centrally communication port 5, and specifically, anti-overflow ring 4 distributes along described still top and kettle body intersection.Anti-overflow hat 3 is fixedly installed between the roof on described anti-overflow ring 4 and still top, and distinguishes separately with the two.Anti-overflow hat 3 is the oval calotte shape with the coaxial setting of described kettle, and parallel with described still top inwall.
For playing good erosion control material effect, have following specific requirement for the structure of anti-overflow ring 4 and anti-overflow hat 3:
The bore of described communication port is the 0.3-0.5 of described kettle internal diameter.
The external diameter of described anti-overflow hat 3 outer rims is greater than the bore of described communication port 5.
Form uniform the first gap between the roof on anti-overflow hat 3 upper surfaces and described still top, described anti-overflow hat 3 lower edges are parallel with described anti-overflow ring 4 upper surfaces and form the second gap.The width in described the second gap is 3-10 times of the first gap.In addition, even interval between the outer rim of anti-overflow hat 3 and described inner wall of kettle, and this interval is greater than the first gap.
By such structure, when material in the still seethes with excitement and upwards boils over, the foam face of its rising should be high along inner wall of kettle, umbilicate form, and higher part is suppressed by anti-overflow ring 4, can only enter zone between anti-overflow ring 4 and the anti-overflow hat 3 by communication port 5, afterwards to around diffuse through the first gap between the roof that the second gap enters anti-overflow hat 3 upper surfaces and described still top.In above-mentioned process, owing to retrained the circulation path of gas-liquid mixture, liquid component is progressively tackled, remaining part is finally ended by demister 2, and the DOPT of gaseous state is discharged by gas phase mouth 16 by demister 2.
Be the control temperature in the kettle, zone on the sidewall of described kettle body between corresponding described the first heating tube 6 and the second heating tube 18 offers temperature-measuring port c1, and the zone on corresponding described the first heating tube top offers temperature-measuring port c2, detects temperature in the kettle by these two temperature-measuring ports.
In addition, on the sidewall of described kettle body in the position between corresponding described the first heating tube 6 and the second heating tube 18, the corresponding vaporization chamber 14 position of nearly overflow ring 4 and nearly the first heating tube 6 offer respectively peep hole.Be packaged with observation window 12 on these three peep holes.
By observation window 12 and temperature-measuring port c1, c2, can make people in time grasp state in the still in the external world, in order in time tackle the situations such as temperature fluctuation, liquid level variation.
In addition, the position of the sidewall of kettle body above the first heating tube 6 offers manhole 13, is packaged with manhole cover on this manhole 13, cleans heating tube in the still so that the operator enters by this manhole 13.
More than be elaborated for invention intention of the present utility model and embodiment by embodiment; but the utility model one of ordinary skill in the art be appreciated that; the above embodiment of the utility model only is one of preferred embodiment of the present utility model; be the length restriction; here can not all embodiments of particularize; any enforcement that can embody the utility model claim technical scheme is all in protection domain of the present utility model.
It should be noted that; above content is in conjunction with concrete embodiment further detailed description of the utility model; can not assert that the specific embodiment of the present utility model only limits to this; under the guidance of above-described embodiment; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion drop in the protection domain of the present utility model.
Claims (7)
1. the evaporation structure of a distillation still, related distillation still kettle inside has evaporimeter, be positioned at the vaporization chamber of described evaporimeter top and the mud chamber that is positioned at described evaporimeter below, be provided with a upper cover with described kettle internal communication on the described kettle top, offer gas phase mouth on the described upper cover, bottom, described mud chamber is provided with discharge gate, it is characterized in that: described evaporimeter comprises many second heating tubes that arrange with the second direction perpendicular to described first direction along the first heating tube and the Duo Gen of first direction setting, the two ends of those horizontally disposed heating tubes respectively with the sidewall sealed engagement of described kettle, offer the perforate that makes each heating tube both ends open open on the sidewall of described kettle; The sidewall of described kettle is outside equipped with a diffluence room and that is communicated with by all the first heating tubes chamber of confluxing, and by a diffluence room and the chamber of confluxing that all second heating tubes are communicated with, offer at least one in described conflux chamber and the diffluence room for the interface of heat transferring medium circulation.
2. the evaporation structure of a kind of distillation still according to claim 1, it is characterized in that: the interval between any two adjacent described the first heating tubes is not less than the external diameter of described the first heating tube; Interval between any two adjacent described the second heating tubes is not less than the external diameter of described the second heating tube.
3. the evaporation structure of a kind of distillation still according to claim 1 is characterized in that: the 1.5-2 that is spaced apart described the first heating tube external diameter between any two adjacent described the first heating tubes times; The 1.5-2 that is spaced apart described the second heating tube external diameter between any two adjacent described the second heating tubes doubly.
4. the evaporation structure of the described a kind of distillation still of any one according to claim 1-3, it is characterized in that: described the first heating tube all is positioned at the top of the second heating tube.
5. the evaporation structure of a kind of distillation still according to claim 3 is characterized in that: described the first heating tube and the second heating tube are evenly distributed respectively.
6. the evaporation structure of a kind of distillation still according to claim 1, it is characterized in that: the interface on the described chamber of confluxing is lower than its internal openings setting, the zone line setting of a plurality of perforates of corresponding its inside of the interface in the described diffluence room.
7. the evaporation structure of a kind of distillation still according to claim 6 is characterized in that: all offer two described interfaces in described conflux chamber and the diffluence room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220617582 CN202892942U (en) | 2012-11-20 | 2012-11-20 | Evaporator structure of distillation still |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220617582 CN202892942U (en) | 2012-11-20 | 2012-11-20 | Evaporator structure of distillation still |
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| Publication Number | Publication Date |
|---|---|
| CN202892942U true CN202892942U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220617582 Expired - Fee Related CN202892942U (en) | 2012-11-20 | 2012-11-20 | Evaporator structure of distillation still |
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| Country | Link |
|---|---|
| CN (1) | CN202892942U (en) |
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2012
- 2012-11-20 CN CN 201220617582 patent/CN202892942U/en not_active Expired - Fee Related
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