CN1200997C

CN1200997C - Dry process for extracting oil from used argil

Info

Publication number: CN1200997C
Application number: CNB021267375A
Authority: CN
Inventors: 蓝少群
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-19
Filing date: 2002-07-19
Publication date: 2005-05-11
Anticipated expiration: 2022-07-19
Also published as: CN1396251A

Abstract

The present invention relates to a technology for extracting oil from waste clay by a drying granulation technique. The present invention comprises the following process steps: 1 part by weight of raw material, namely waste clay and 0.1 to 0.4 part by weight of an adhesive are mixed and granulated; the granulated granular mixture is soaked in a solvent, and the mixed oil of oil and the solvent is extracted; the extracted mixed oil of oil and the solvent is evaporated by an evaporator; crude oil which reaches the standard after evaporation is collected. The present invention has the advantages of simple technology, substantial reduction on devices, reduction in production cost, high yield, high safety and high reliability; moreover, the present invention also has function of making the best use of things; the present invention has high social value and economic value for the input and output of the technology, environmental pollution settlement, etc.

Description

Dry process for extracting oil from used argil

The present invention relates to a kind of with greasy technology in the useless carclazyte of non-slurry pelletizing technology extraction.

Existing useless carclazyte is the tankage that produced in the process of oil prodution industry refining decolouring, its major ingredient is that carclazyte (pure aluminium silicate) adds its adsorbed grease, pigment, impurity etc., color has white, light ash, filbert etc. according to affiliated place of production difference, be steel gray and brown etc. behind the absorb oil, shape becomes powder or bulk according to the number of oil-containing quantity, hand is pinched generally plastic, and the person that contains the innage can reveal oil from soil.

Useless carclazyte content of oil and grease is generally 16%～35%, different and increase and decrease according to processing and equipment situation, generally adopting than the sophisticated equipment and the continous way producer is low value, otherwise adopting more backward equipment and batch production person is high value, misoperation or seal when bad oil-containing even reach 40%～50%.Because the quantity of useless carclazyte accounts for about 2% of oil and fat refining output, so bigger for general refinery quantity.The useless carclazyte filter cake of used decolouring is very sensitive to oxidation, even may spontaneous combustion.Used useless clay treatment generally is to bury in water sprinkling and the melt pit.As do not have preventive measures, and filter cake may become the hidden danger of fire, and the useless carclazyte that buries in the hole needs in time to cover, as far as possible excluding air and the danger of minimizing incendiary.Owing to reasons such as high temperature and oxidation rate after the useless carclazyte discharging, cause contained Oxidation of Fat and Oils to go bad to add and give utilization, so each producer all employs the people to remove as waste, its resource is wasted, and contaminate environment.

Existing useless clay treatment is divided into two kinds of dry method and wet processings:

Wet processing:, remove the oil slick of keeping afloat again promptly in infusions such as useless carclazyte Zhong Jiashui, salt.Its shortcoming is to add a large amount of water, and in these water, owing to sneak into a large amount of useless carclazytes, so environmental pollution is bigger, and also the energy consumption of dry these water is very big, so can't adopt.

Dry process: be the filter with fully-closed, before the miscella evaporation refiltered oil, divide several stages with hexane oil and grease extracting from useless carclazyte.But,, can't separate, so suitability for industrialized production is very difficult because useless carclazyte is carried the oil back and hexane is mixed into pulpous state.And need sizable investment, safety equipment requirement is very high.

Other has a kind of employing clay to add water and useless carclazyte to mix and be pressed into sheet with screw extrusion and handle, and the shortcoming of this method is: clay cost height first; Second need dry and anhydrate; Three energy consumptions, machines consume greatly, yield poorly, and can not be used for industrial production.

The object of the present invention is to provide a kind of efficiently, low-cost, be suitable for the dry process for extracting oil from used argil of suitability for industrialized production.

The dry process for extracting oil from used argil step is:

1, raw material (useless carclazyte) is mixed and granulation with binding agent, raw material and binding agent are 1: 0.1～0.4 by weight (down together);

2, the particle mixture after the granulation is soaked in solvent, extract the mixing oil of grease and solvent;

3, with the grease and the miscella evaporator evaporation that are extracted;

4, the up to standard crude oil of collection after evaporation.

Said binding agent can adopt the useless carclazyte powder of having carried oil.Granulation can be adopted the granulator of bad pattern; after ring is molded into particle, send in the batch extractor; in jar, soak repeatedly through fresh solvent; the pore of solvent in particle is impregnated into the particle center and the grease that is wrapped in the useless carclazyte extruded outside the carclazyte particle; solvent is stayed in the particle, and compound lard is discharged from pot bottom.This moment heat temperature raising, solvent is heated and volatilize away from particle, obtains the purer not butyraceous carclazyte particle that gives up.And solvent reclaims and reuses after fraction water device water-dividing, cooling.And mixing oil (being mixed with solvent in the oil) reclaims solvent and more purified crude oil through vaporizer.

Advantage of the present invention is: 1, the useless carclazyte powder of carrying behind the oil is used as binding agent, because of useless carclazyte raw material promptly is bentonite clay or attapulgite clay, itself has certain cohesiveness and adsorptivity, the carclazyte of carrying behind the oil is added in the useless carclazyte of Gao Shui, oil, Gao Shui, the useless carclazyte of wet goods are played dilution, adhesive effect, useless carclazyte granule strength after the granulation is increased, be unlikely by soaking powder being split into, cause and to extract to one of mashed sposh.The useless carclazyte that use is carried behind the oil is reused, cost saving first, and second can make the carclazyte of carrying behind the oil be used in others again becomes possibility.2, adopt the ring mode granulator to carry out granulation, by to the designing treatment of granulator nib shape in the scope of φ 2～6mm, can according to circumstances obtain output height, the measured effect of matter.3, can adopt batch extractor and miscella evaporation device, water trap to make particle in the jar under the effect of solvent, because the hole between the particle makes solvent be easy to soak into; Owing to the pore effect in the useless carclazyte of particle makes solvent can immerse the particle center contained grease is extracted again, particle after the extraction is under the effect of heat energy, solvent is easy to volatilization and the recovery of cooling back from intergranular hole, Residual oil in the useless like this carclazyte only reaches about 0.5%～1%, reaching the higher rate of recovery, is that other method can't be accomplished.The mixing oil that discharge the batch extractor bottom evaporates with vaporizer and makes crude oil and separated from solvent, water trap then can be used for separating solvent and water.

In sum, technology of the present invention is simple, and equipment significantly reduces, and production cost reduces, and the output height is safe and reliable.And make the best use of everything, all there is very high social economic value in its institute of logistics at aspects such as its input-output, solution environmental pollutions.

Fig. 1 is a technological principle FB(flow block) of the present invention.

Following examples will the present invention is further illustrated in conjunction with the accompanying drawings.

Embodiment 1: as shown in Figure 1, with the useless carclazyte raw material 1 of the not carrying oil few useless carclazyte dry powder 2 of having carried oil (account for raw material 25%) that adds more than moisture, oil, as binding agent, put into mixing machine 3 mixings; Send in the hopper of granulator 4, granulator is selected ring mode for use again, and nib is φ 4mm; Send into batch extractor 5 after the granulation, add solvent hexane and soak 40min, be evacuated to back 1 batch extractor again, 3 of batch extractors are 1 group, soak altogether 3 times, each 40min.Because the pore of hexane in mixture particle be impregnated into the particle center, and an oil extraction that is wrapped in the useless carclazyte come out, hexane and the grease that is extracted are evacuated to miscella tank 6 at the bottom of batch extractor.Still have this moment partial solvent to stay in the useless carclazyte particle, add after pressure is the open steam 20min of 0.1Mpa by the bottom of batch extractor, add open steam again from batch extractor 5 tops, pressure can be 0.1Mpa, the hexane granular carclazyte that contains in the jar is carried out boiling, till detection from thief hole is qualified.Hexane in the granular carclazyte is subjected to being higher than the hot steam raising of its volatilization temperature, promptly evaporate in the condenser with water by intergranular slit, and hexane vapour becomes liquid, then flows in the water trap 7.Owing to water sinks to the bottom than hexane is heavy, and the hexane come-up reaches both isolating purposes.

The mixing oil (oil: hexane concentration is 18%) that is extracted into miscella tank 6 is sent into vaporizer 8, and its structure is the ordered series of numbers fine steel tube, stream mixing oil in the pipe, the outer steam that feeds of pipe, pressure is 0.2Mpa, the hexane in the mixing oil expands under high temperature action, then upwards be boiled into gas, evaporate in the condenser.In order to improve the miscella concentration after the evaporation of hexane, can establish multi-step evaporator, for example hexane content about 30% behind 1 grade of vaporizer.Behind 2 grades of vaporizers, reduce to about 5%.In 3 grades of vaporizers (stripping tower), from the bottom if add open steam (pressure can be made as 0.05Mpa), steam flow is that oil is heavy by 10%, the flow direction of this steam flow and mixing oil is opposite, form adverse current, hexane remaining in the mixing oil evaporate in the condenser from mixing oil under the effect of direct vapour.Contain moisture in the steam, so will arrive and divide dried up and hexane in the water trap, (the indirect steam pressure that this moment, 3 grades of vaporizers were stripping tower is about 0.6Mpa, plays the effect of insulation and vaporization hexane), the crude oil that obtains thus generally can reach and contain the national standard that hexane is 50ppm.

Embodiment 2: press embodiment 1 described technological process, select for use binding agent to account for raw material 10%, the nib of granulator is elected φ 3mm as; the solvent soaking time is 30min, and 4 of batch extractors are 1 group, soaks alternately 1 time; the pressure of open steam is elected 0.1Mpa as, and the time is 45min.The mixing oil that is extracted into miscella tank is sent into vaporizer, and pressure can be 0.25Mpa, and vaporizer can be established 2 grades.

Embodiment 3: select for use binding agent to account for raw material 30%, the nib of granulator is elected φ 5mm as, and the solvent soaking time is 35min, and 2 of batch extractors are 1 group; soak 4 times, soak time is respectively 35,50, and 35; 45min, the pressure of open steam is elected 0.15Mpa as, and the time is 30min.Mixing oil is sent into vaporizer, can establish 3 grades.

Embodiment 4,5: binding agent accounts for raw material and is respectively 40% and 20%, and the nib of corresponding granulator is φ 6mm and φ 3.5mm, and the solvent soaking time is 40min, and each soaks 5 times and 2 times, and the pressure of open steam is 0.1Mpa and 0.15Mpa, and vaporizer is established 3 grades.

Claims

1, dry process for extracting oil from used argil is characterized in that processing step is:

1), the useless carclazyte of raw material is mixed with binding agent and granulation, raw material and binding agent are 1: 0.1～0.4 by weight, and oily useless carclazyte powder has been carried in said binding agent employing;

2), the particle mixture after the granulation is soaked in solvent, extract the mixing oil of grease and solvent, said solvent is a hexane;

3), with the grease and the miscella evaporator evaporation that are extracted:

4), the up to standard crude oil of collection after evaporation.

2, dry process for extracting oil from used argil as claimed in claim 1 is characterized in that said granulation adopts the granulator of ring mode, sends in the batch extractor after ring is molded into particle and soaks.

3, dry process for extracting oil from used argil as claimed in claim 1 is characterized in that it is φ 2～6mm that said granulator is selected nib for use.