CN102899089B

CN102899089B - Production process for soft montan wax

Info

Publication number: CN102899089B
Application number: CN201210334039.8A
Authority: CN
Inventors: 苗永旗; 胡光洲; 成刚; 李春艳; 任伟; 张双全
Original assignee: Guodian Fuel Co Ltd
Current assignee: Guodian Fuel Co Ltd
Priority date: 2012-09-11
Filing date: 2012-09-11
Publication date: 2014-08-20
Anticipated expiration: 2032-09-11
Also published as: CN102899089A

Abstract

The invention discloses a production process for soft montan wax. The process comprises the following steps: carrying out pretreatment like crushing and screening on brown coal, extracting the pretreated brown coal by using any conventional way so as to obtain a wax-rich solution, subjecting the solution to evaporative concentration, pumping the concentrated solution into a cooler by using a jet pump and allowing the concentrated solution to directly contact with cooling water with a temperature of 5 to 30 DEG C in the cooler in a violent turbulence state; allowing a wax-water mixture from the cooler to pass through a vacuum rotary drum filter so as to separate montan wax from water; delivering the montan wax obtained after filtration to a wax storing tank through a belt and carrying out standing; and pumping the separated water into a water cooling tower for cyclic utilization. The process has the advantages of environment friendliness, remarkable energy saving, high product yield, a light product color, low content of albanite and simpleness; and compared with similar domestic and overseas apparatuses, the process provided by the invention enables distinct energy-saving, environmental, economical and social benefits to be obtained.

Description

A kind of soft montanin wax production technique

Technical field

The production of low-molecular-weight component in the present invention relates in coal, especially a kind of soft montanin wax production technique, belongs to the production application field of montanin wax.

Background technology

Montanin wax is the small molecules composition extracting from brown coal, belong to humatite resource, it is a kind of mineral wax of uniqueness, montanin wax production technique is divided into two classes both at home and abroad at present, be intermittent type (pot group type) production technique and continous way production technique, above-mentioned two class production technique are high-temperature molding method, mainly comprise the solvent leaching of montanin wax, content of wax solution filter and concentrated, the links such as the formed package of solvent recuperation (mainly referring to solvent in the wet contained solvent of coal and blended wax liquid) and wax, just slightly different in solvent leaching link, other operations are substantially similar, especially aspect the moulding of montanin wax, obtained extraction liquid is first passed through vaporizer by both, desolvation, remove remaining solvent by steam cooker again, obtain the montanin wax reshaping of molten state.

This high-temperature molding method must be evaporated low boiling component in lower boiling solvent and montanin wax, and in actual production, there are the following problems:

(1) quantity of solvent that steam cooker and revolving drier are evaporated is often less, do not have commercial recovery to be worth, this part solvent evaporating distributes in workshop together with the lower boiling small molecules of part, not only cause solvent and montanin wax part loss of effective components, and the volatile component of toxicity works the mischief to operator's health, surrounding environment is polluted.

(2) for evaporative process fast, effectively carry out, higher temperature need to be provided, adopt the enterprise that benzene is solvent, the local temperature in steam cooker often exceedes 100 degree; Adopt the enterprise that toluene is solvent, the local temperature in steam cooker often exceedes 120 degree.Too high temperature makes montanin wax generation complex chemical reaction, causes resin and pitch earth (two kinds are impurity) content in montanin wax all greatly to increase, and the color of montanin wax is also mostly chocolate.

Summary of the invention

The problem existing for above-mentioned prior art, the invention provides and a kind ofly can effectively reduce the harm to operator's health and surrounding environment, environmental protection, energy-conservation, and ensure the soft montanin wax production technique of the montanin wax quality of production.

To achieve these goals, production technique of the present invention is:

A. brown coal are carried out to fragmentation, screening, get the brown coal that grain diameter is 0.2 ~ 10mm;

B. brown coal grain screening being obtained is put into extractor, extraction process can be continous way or intermittent type, the solvent adopting can be the mixed solvent forming between the alcohols such as benzene, toluene, hexanaphthene, normal hexane or they and methyl alcohol, ethanol, with 110 ~ 125 DEG C of saturated vapor heating, between 2 ~ 5MPa, carry out pressure extraction, extraction time is 2 ~ 4h;

What c. extraction is obtained is rich in wax solution after evaporation concentration, squeezes into water cooler through squirt pump, directly contacts under violent turbulence state with the water coolant of 5 ~ 30 DEG C in water cooler;

D. from water cooler wax, water mixture process vacuum tumbler filter out, montanin wax is separated with water;

E. the montanin wax after filtering is sent to storage wax pan by belt, and storage wax pan temperature maintains 40 ~ 60 DEG C, leaves standstill 24 ~ 72h; It is cooling that isolated water is got to water cooling tower through pump, recycle.

Extraction time is 2.5h.

Extractor is chuck heating-type extractor.

Pressure extraction pressure is 3 ~ 4MPa.

Saturated vapor temperature is 120 DEG C.

Storage wax pan temperature is 50 DEG C.

Water coolant is pure deionized water, and Temperature Setting is 20 DEG C.

Montanin wax after filtration leaves standstill 32h in storage wax pan.

Compared with existing high-temperature molding production technique, the present invention utilizes montanin wax and the immiscible feature of water, taking the pure water such as deionized water as refrigerant, pure water is directly contacted with crude montan wax, and by montanin wax cooling forming, its tool has the following advantages:

(1) replace the high temp modeling appts that boils paraffin pan and molten state montanin wax, reduced the volatilization loss of partial solvent and montanin wax composition, also reduced the injury of this part volatile component to operator's health and the pollution to environment;

(2) reduced the high temp modeling appts that boils paraffin pan and molten state montanin wax, can be energy-conservation more than 10%;

(3) color of gained montanin wax is tawny, and ordinary method gained montanin wax color is chocolate, obviously shoals, and has reduced the tooling cost of downstream light color wax;

(4) gained montanin wax resin, pitch earth content all reduce, and especially resin content reduces greatly.

This process environments close friend in a word, obvious energy conservation, product yield is high, quality is good, and technological process is simple, can realize continuous automatic production, has very significantly energy-conservation, environment, economical, societal benefits compared with domestic and international allied equipment.

Utilize this law to prepare montanin wax, use the index of montanin wax that traditional method is produced to contrast it and our factory, as table 1:

Embodiment

The invention will be further described below.

First crusher in crushing, vibrosieve for brown coal are entered to coal grain storehouse, sieve is got the brown coal of grain diameter 0.2 ~ 10mm; The brown coal that sieve is got are put into extractor, and existing extractor has chuck heating-type, pot group type, track type conventionally, groove band sieve formula extraction plant, and the preferred extractor in our factory is chuck heating-type extractor, uses more conveniently, effect of extracting is better; The ratio that is 1:2.5 in solid-liquid volume ratio is put into solvent benzol, with saturated vapor heating, and is preferably set to 120 DEG C, and extraction efficiency is high, save energy; Because the pressurization between 2 ~ 5MPa is beneficial to extraction, according to the customary practice of our factory, preferably working pressure is controlled between 3 ~ 4MPa, pressure exceed stop heating, hypotony reheats, be easier to control; Extraction time 2.5 hours, not only extraction is abundant, and energy free waste; What extraction was obtained is rich in wax solution after level Four evaporation concentration, squeeze into water cooler through squirt pump, directly contact at violent turbulence state with the water coolant of 5 ~ 30 DEG C, the object of turbulence is to reduce the granularity of montanin wax, by pure deionized water, temperature of cooling water is controlled at 20 DEG C, is beneficial on the one hand the cooling intensity that ensures montanin wax, also make on the other hand montanin wax shaped granule size more moderate, more attractive in appearance; From water cooler wax, water mixture process vacuum tumbler filter out, montanin wax is separated with water, montanin wax after filtration is sent to storage wax pan by belt, leave standstill 24 ~ 72h, 32h generally selects to leave standstill in our factory, now montanin wax basic forming, and do not include very long time of repose, shorten the time of making the product of montanin wax; Isolated water is got to water cooling tower through pump and is cooled to 5 ~ 30 DEG C, recycle.

Claims

1. a soft montanin wax production technique, is characterized in that, concrete steps are:

B. brown coal grain screening being obtained is put into extractor, extraction process can be continous way or intermittent type, the solvent adopting can be benzene, toluene, hexanaphthene, normal hexane or and methyl alcohol, ethanol between the mixed solvent that forms, with 110 ~ 125 DEG C of saturated vapor heating, between 2 ~ 5MPa, carry out pressure extraction, extraction time is 2 ~ 4h;

2. the soft montanin wax production technique of one according to claim 1, is characterized in that, described extraction time is 2.5h.

3. the soft montanin wax production technique of one according to claim 1, is characterized in that, described extractor is chuck heating-type extractor.

4. the soft montanin wax production technique of one according to claim 1, is characterized in that, described pressure extraction pressure is 3 ~ 4MPa.

5. the soft montanin wax production technique of one according to claim 1, is characterized in that, described saturated vapor temperature is 120 DEG C.

6. the soft montanin wax production technique of one according to claim 1, is characterized in that, described storage wax pan temperature is 50 DEG C.

7. the soft montanin wax production technique of one according to claim 1, is characterized in that, described water coolant is pure deionized water, and Temperature Setting is 20 DEG C.

8. the soft montanin wax production technique of one according to claim 1, is characterized in that, the montanin wax after described filtration leaves standstill 32h in storage wax pan.