CN201299982Y

CN201299982Y - Series-connected multi-level rectification solvent recovery device

Info

Publication number: CN201299982Y
Application number: CNU2008201378262U
Authority: CN
Inventors: 徐凡卜
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-27
Filing date: 2008-10-27
Publication date: 2009-09-02
Anticipated expiration: 2018-10-27

Abstract

The utility model discloses a series-connected multi-level rectification solvent recovery device; the recovery device is sequentially connected with a first heater 1, a first tower body 2, a first condenser 3, a second heater 4, a first tower body 5, a second condenser 6, a third heater 7, a third tower body 8 and a third condenser 9 in series; the recovery device has the beneficial effects that: the limitation of the solvent recovery is solved to a great degree by the device, and the series-connected multi-level rectification solvent recovery device has the characteristics of compact structure, low original cost, small occupying area, low space usage, small operation range of workers, simple operation and the like.

Description

Tandem multistage rectification solvent recycler

Technical field

The utility model relates to a kind of recover, particularly a kind of chemical industry organic solvent waste liquid recover.

Background technology

In chemical industry organic solvent waste liquid recovery field, multiple mixed solvent separating technology is an important subject always, make a general survey of the relevant document in China and foreign countries, how multiple mixed solvent thoroughly separates the brainstrust that is always troubling this technical field of rectifying that goes in for the study, at present China aspect the rectifying field creativity and innovation a variety of isolation technics, but certain limitation is arranged all, many relatively solvents can only carry out optionally several solvents to be separated, and all can not reach final ideal effect, traditional separated from solvent reclaimer tower height is big and heavy, the floor space height that takes up room greatly, original cost is too high, the manually-operated scope is big and loaded down with trivial details, and separating effect is undesirable.

Summary of the invention

At the shortcoming of prior art, the utility model provides a kind of novel tandem multistage rectification solvent recycler.

To achieve these goals, the utility model says that the technical scheme of taking is:

Tandem multistage rectification solvent recycler, this recover are in series with primary heater 1, first tower body 2, first condenser 3, secondary heater 4, second tower body 5, second condenser 6, the 3rd heater 7, the 3rd tower body 8, the 3rd condenser 9, cooler 10, storage tank 11, circulating pump 12 successively; Circulating pump 12 1 ends are connected respectively to the bottom of storage tank 11, and the other end is connected the top of the 3rd tower body 8, and cooler 10 is connected the 3rd condenser 9 lower ends, the upper end of storage tank 11; Primary heater 1 communicates with the middle part of first tower body 2, the middle part of first tower body 2 communicates with the bottom of first condenser 3, secondary heater 4 communicates with the middle part of second tower body 5, and the middle part of second tower body 5 communicates with the bottom of second condenser 6, and the 3rd heater 7 communicates with the middle part of the 3rd tower body 8.

The beneficial effects of the utility model: this equipment has solved the limitation of solvent recovery to a great extent, and tandem multistage rectification solvent recycler has compact conformation, and original cost is low, floor space is little, characteristics such as it is low to take up room, and the manually-operated scope is little, and is simple to operate.This equipment great advantage is not need the too high rectifying tower body can be with separated from solvent, and purity is than the legacy equipment height.This equipment especially reclaims ideal to the widest methyl alcohol of purposes, ethanol.Under situation about not refluxing, can reach the absolute ethyl alcohol state.

Description of drawings

Fig. 1. isometric front view of the present utility model.

Fig. 2. rear perspective view of the present utility model.

The specific embodiment

See also its implementation process of description of drawings:

Tandem multistage rectification solvent recycler, this recover are in series with primary heater 1, first tower body 2, first condenser 3, secondary heater 4, second tower body 5, second condenser 6, the 3rd heater 7, the 3rd tower body 8, the 3rd condenser 9, cooler 10, storage tank 11, circulating pump 12 successively; Circulating pump 12 1 ends are connected to the bottom of storage tank 11, and the other end is connected the top of the 3rd tower body 8, and cooler 10 is connected the 3rd condenser 9 lower ends, the upper end of storage tank 11; Primary heater 1 communicates with the middle part of first tower body 2, the middle part of first tower body 2 communicates with the bottom of first condenser 3, secondary heater 4 communicates with the middle part of second tower body 5, and the middle part of second tower body 5 communicates with the bottom of second condenser 6, and the 3rd heater 7 communicates with the middle part of the 3rd tower body 8.

I am according to design, operating experience are that theoretical foundation is designed the brand-new type tandem multistage rectification solvent recycler that is applicable to multiple separated from solvent recycling in conjunction with vast customer demand hope with the multistage rectification principle for many years.Tandem multistage rectification solvent recycler divides two kinds of models, a kind of is outer circulation type multitower rectifying recover, it integrates the multitower multiple-effect, not only can concentrate various materials but also can reclaim various single solvents or multiple boiling point, solvent medium that density is different when concentrating under vacuum state.This equipment high efficiency purposes scope is wide, and it is higher relatively to reclaim purity.Another kind is an internal-circulation type solvent recover, this equipment is used specially and is separated inorganic, the organic solvent that reclaims the various high and low concentration of rectifying, as multiple organic solvents such as aqueous mixtures, ethanol, methyl alcohol, ether, ethyl ester, n-butanol, ethyl acetate, ethyl acetate, brass, acetone.

The data that obtain with the practical operation example are illustrated below:

Operation principle:

1: the Diluted Alcohol with 15-35% is an example: the dilute concentration solvent is entered three reboilers respectively, opening steam heats, after reaching solvent boiling point, the vaporization liquid that produces is along the upwards evaporation of essence stream tower, when touching accurate filling surface, beginning is carried out heat exchanging process at filling surface, under the temperature difference and drag effect, begin to produce the vapor-liquid separation phenomenon this moment, the side that the big boiling point of material density is high begins to reflux downwards along filling surface and tower body wall surface, and density is light, a low-boiling side then continues upwards evaporation under temperature constant state, arrive condenser and enter condensation process, after in temperature-fall period, producing vaporization liquid, flow downwards along the condensation tube wall, about the about 50-60% of condensed purity of alcohol this moment, enter second heating clamber and carry out the evaporation separation second time, and this moment, three heating clamber lower liquid balance pipe valves were opened simultaneously, make the liquid level in three heating clambers keep poised state, in order to avoid the two or three heating clamber influences separating effect because of liquid level is too high, the condensate liquid of first condenser enters heat energy that second heating clamber produces by this chamber rapidly later on and sends into and carry out the secondary heat exchange in second rectifying column with further raising rectifying purity, this moment, the ethanol of the 3rd condenser condenses was still got back to the 3rd heating clamber with its purity of further raising by return valve about about ten minutes reaching boiling point, opened the valve that enters storage tank and made first but treat over after ten minutes the closing volume valve, the high ethanol of purity that second condenser produces is once more through entering finished product storage tank after the rectifying for the third time.The purity of alcohol that enter storage tank this moment does not need can reach about 99.3%-99.5% under the forced refluence situation in the ordinary course of things, reaches the absolute ethyl alcohol claimed condition.And the ethanol content of heating clamber bottom raffinate is only about 0.03-0.05, and almost near the pure water state, the rate of recovery can reach more than 99.5%.Can carry out the purity chemical examination by " GB619 sampling and check and accept specification " this moment and detect, if do not reach 99% purity can utilize reflux pump once to reflux can be up to the purity that reaches 99.3%-99.5%.(this parameter is through using producer's actual experiment gained).

2: with other any three kinds of density, the different organic solvent of boiling point is an example: the dilute concentration solvent is entered three reboilers respectively, opening steam heats, after reaching wherein the low solvent boiling point of the light boiling point of certain density, the solvent of evaporative condenser directly enters second reboiler and evaporates rectifying, can be communicated with the one the second heating clambers respectively this moment according to solvent properties, the 3rd heating clamber is separated separately, perhaps first heating clamber is separated separately, the two or three heating clamber is communicated with, like this can be with density, the further effectively separation of organic solvent that boiling-point difference is little can not cause solvent repeatedly partly mixing once again in the distillation process because of all connecting.After inspection by sampling is confirmed all to reclaim respectively after first kind of solvent separates through three times, three heaters can be communicated with the two kinds of separated from solvent processes of being left, detect till reaching separation requirement through sampling.In multiple solvent recovery,, must utilize reflux type can reach technological requirement at some solvent owing to all kinds of solvents character, proterties difference.Need then installing a transparent separator additional and can reaching the azeotropic requirement of azeotropic for certain.

More than two kinds of rectificating methods main cause that can surmount traditional rectifying device greatly be: this design utilizes under the separated from solvent state, the heat exchanging process of repeatedly heating, lower the temperature makes its purer part have no chance to be evaporated once more with the low solvent of tower once more when entering next rectifying, precondition is temperature must be controlled in the boiling point claimed range, must keep temperature constant state.

Energy-saving principle:

1: adopt particular design will highly reduce more than 60% in conjunction with accurate filler and multitower rectifying principle, be that traditional distillation equipment must be up to about 95% at scope concentration of alcohol more than 12 meters, can reach more than 99% and this novel device only needs 3 meters height and reclaim ethanol under situation about not refluxing, both save nearly 60% space, saved personnel labor intensity again.Equipment is in running, and operating personnel no longer need to ascend a height, and only needs to get final product free operant on ground. and time saving and energy saving.For the tandem multistage rectification solvent recycler of Automatic Control, operating personnel only need to monitor before computer and can grasp the whole operation flow process.

2: because design is unique exquisite, makes raw material and save about 20% than traditional distillation equipment, equipment is lightly attractive in appearance, and simple installation is flexible, convenient transportation.Equal specification is saved space about 60% than traditional distillation equipment, and floor space reduces more than 30%.Be specially adapted to the little workshop in space.And traditional rectifying, distillation equipment are tall and big and heavy, the consumptive material power consumption, and the rate of recovery is low, reclaims purity difference, so this tandem multistage rectification solvent recycler is the optimal selection that thoroughly replaces tradition distillation rectifying device at present.

3: tandem multistage rectification solvent recycler is compared with the present neoteric filter membrane that penetrates, have that cost is low, long service life, no easily worn part, applied widely, easy cleaning, do not stop up, easy-maintaining, seven big advantages, the neoteric filter membrane that penetrates can only carry out optionally single dewatering process, can't carry out many group organic solvents separates, use the back to clean difficulty, raw material cost height, fragile, easily stop up, can't keep in repair, solvent PROCESS FOR TREATMENT in early stage is numerous and diverse, changes shortcomings such as frequent, therefore; Tandem multistage rectification solvent recycler is present traditional distillation, rectifying device, novelly penetrates the rectifying reclaimer of new generation that filter membrane is incomparable forever and surmount.

4: two kinds of power save modes are adopted in the heating steam of tandem multistage rectification solvent recycler, a kind of is the serial connection mode, the condensed water that promptly produces in heating process is not directly discharged, carry out waste heat and use again but utilize staged temperature difference principle to be introduced into second, third reboiler, another kind is to utilize the thermal coupling principle in conjunction with the staged temperature difference principle solvent to be heated, the evaporated vapor that promptly utilizes the bottom heating clamber to produce heats the solvent of top heating clamber, two kinds of principles combine not only saves original steam but also save recirculated cooling water, plays the effect of killing two birds with one stone.Compare in heating process and can save steam about 20% with tradition distillation, rectifying device through first kind of mode of actual experiment proof, take the second way to compare in heating process and can save steam about 30% with tradition distillation, rectifying device according to the technology difference.This also is that tradition distillation, rectifying device are beyond one's reach.

Purity difference: with evaporation capacity 100kg/ tandem multistage rectification hourly solvent recycler rectifying 20% left and right sides methyl alcohol or ethanol is example; When the primary heater temperature reached boiling point 80-90 ℃, rectifying purity approximately can reach between the 60%-70%, (laboratory standard requires 3 meters of height of column, and purity can reach more than 99%).Approximately can reach between the 80%-90% through 1.2 meters rectifying stroke purity when temperature reaches boiling point 75-80 ℃ in the secondary heater.Get final product between the 99%-99.5% through 1.2 meters rectifying stroke purity when temperature reaches boiling point 70-78 ℃ in the 3rd heater.(ethanol) (these data be evaporation capacity 100kg/ tandem multistage rectification hourly solvent recycler in Shandong hundred auspicious medicine company actual experiments obtain).

Energy consumption: the every evaporation of traditional alcohol distillation column 1Kg alcohol approximately consumes about 2.5 kilograms of steam, and the condensed water of its generation is directly drained, and a part of steam also can be discharged with condensed water.Multitower solvent recover is utilized the residual temperature of residue vapor and condensed water owing to adopt the serial connection connection method once more, directly saves 〉=0.5 kilogram of power consumption.

The design advantage of novel solvent recover has replaced outside the working range of traditional rectifying column fully, has also possessed the function of use of multiple-effect inspissator, is the most energy-conservation ideal equipment of industry such as present pharmacy, chemical industry, health care, food.

Claims

1, tandem multistage rectification solvent recycler, it is characterized in that this recover is in series with primary heater (1), first tower body (2), first condenser (3), secondary heater (4), second tower body (5), second condenser (6), the 3rd heater (7), the 3rd tower body (8), the 3rd condenser (9) cooler (10), storage tank (11), circulating pump (12) successively; Circulating pump (12) one ends are connected respectively to the top that tank bottom, the other end are connected the 3rd tower body (8), and cooler (10) is connected the 3rd condenser (9) lower end, the upper end of storage tank (11); Primary heater (1) communicates with the middle part of first tower body (2), the middle part of first tower body (2) communicates with the bottom of first condenser (3), secondary heater (4) communicates with the middle part of second tower body (5), the middle part of second tower body (5) communicates with the bottom of second condenser (6), and the 3rd heater (7) communicates with the middle part of the 3rd tower body (8).