CN102154036A

CN102154036A - Method for producing boiler fuel by utilizing papermaking black liquid

Info

Publication number: CN102154036A
Application number: CN2011100574924A
Authority: CN
Inventors: 杜良才; 樊文源; 杜仲; 郭永红
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-10
Filing date: 2011-03-10
Publication date: 2011-08-17
Anticipated expiration: 2031-03-10
Also published as: CN102154036B

Abstract

The invention relates to a method for producing boiler fuel by utilizing papermaking black liquid, comprising two steps, namely extraction of lignin and preparation of boiler fuel, wherein the extraction of the lignin comprises the following steps of: firstly, adding glacial acetic acid into papermaking black liquid with the Baume concentration of 36-38'Be and stirring until the pH value becomes 7-8, then adding ammonia acetate and industrial alcohol sold on the market, stirring uniformly, then sealing 12 hours at normal temperature for depositing, carrying out azeotropic distillation on clear liquid for recovering all ethanol and most of water to obtain ammonia lignin paste, wherein the deposition is sodium acetate which is recovered as a byproduct after being washed with methanol; and the preparation of the boiler fuel comprises the following steps of: adding methanol and dioxane in the ammonia lignin paste, filtering after uniformly stirring to obtain basic fuel, and finally, and adding methanol to the basic fuel to produce the boiler fuel provided by the invention. Through the method provided by the invention, resource components in the black liquid are completely utilized, waste materials are changed into valuables, the pollution of the environment is remarkably lightened, the producing process is simple and convenient, and the produced boiler fuel has a high combustion value and lower cost.

Description

Utilize black liquid to make the method for boiler oil

Technical field

The invention belongs to the regeneration of pulping waste liquor, particularly the processing of black liquid and utilization.

Background technology

Black liquid also claims papermaking wastewater, and it is a kind of serious source of pollution, is again a kind of for the resource of recycling.For making black liquid be able to recycling, Come has developed some and has done the product technology of various different purposes in recent years, for example is used as coal briquette bond, coal water slurry, correcting fluid etc.In the prior art, have a CN1207429A open on February 10th, 1999, it is the treatment process of a kind of papermaking wastewater synthesis of heavy oil (diesel oil) and papermaking wastewater thereof; Be papermaking wastewater after cascade filtration is removed the fiber foreign material, heat to being consistent with international heavy oil (diesel oil) temperature, and the degree Beaume that makes waste liquid is more than 5 ' Be, alkalinity is between the 4-12 grams per liter, the papermaking treatment solution that obtains after treatment is mixed in the GB heavy oil (diesel oil) to be not less than 30% consumption, add to obtain synthesis of heavy oil (diesel oil) after 1 ‰ compound agentes fully mix, it is said that alternative GB heavy oil (diesel oil) uses on various industrial furnaces.Its defective is still to refer and synthesize a large amount of GB diesel oil, and the papermaking treatment solution only forms oil in water emulsion with diesel oil, and the dynamic property of fuel is poor, and the actual use value of this technical scheme is little.Also have a CN101358211A open on February 4th, 2009, it is a kind of method with producing alcohol from paper manufacture waste liquid, adds acid or C in papermaking wastewater ₅Enzyme solution, stir, heat and obtain sacchariferous acid or enzyme hydrolyzate by extraction, add the alkaline matter neutralization, separate and the magnetization filtration by shearing, obtain extract, add the catalyzer heating fermentation and obtain reactant, obtain the absolute alcohol series products through rectifying and dewatering, it is said to can be used to do fuel or other purposes.Its defective is only to have utilized in the black liquor material of starch-containing class or the hydrolyzate of wood sugar, and the major ingredient xylogen in the black liquor can't be used acid and C ₅Enzymatic conversion is a glucose, and is that a large amount of xylogen are abandoned and be not utilized effectively; And under the situation that does not reclaim alkali, also can make the pollution of waste liquid become more serious through adding acid-fermentation.

Summary of the invention

The objective of the invention is to above-mentioned defective at the prior art existence, plan provides a kind of method of utilizing black liquid to make Pans stove fuel that is different from prior art, make the resource component in the black liquor can obtain to greatest extent utilizing, the light environmental pollution of Xian Zhu Minus of can not only turning waste into wealth, and manufacturing process is easy, the Pans stove fuel product combustion value height that makes, and cost is lower.

Bian realizes purpose of the present invention with following technical scheme Come.

A kind of method of utilizing black liquid to make Pans stove fuel is made up of the extraction of xylogen and two step of the preparation process of Pans stove fuel, it is characterized in that:

1) extraction of xylogen is, in Baume concentration is in black liquid 1000 weight parts of 36-38 ' Be, add Glacial acetic acid 70～75 weight parts earlier, be stirred to pH value 7-8, add commercially available Ammonium Acetate 220～230 weight parts and industrial alcohol 950～1500 weight parts again, seal 12 hours precipitations after stirring at normal temperatures, get the clear liquid component distillation and reclaim and obtain ammonia xylogen paste behind whole ethanol and the most water, throw out is that sodium-acetate reclaims as by product after with methanol wash;

2) preparation of Pans stove fuel is, in 1000 weight part ammonia xylogen pastes, add 950～1005 weight part methyl alcohol and 8～12 weight part dioxane, after-filtration stirs, make basic fuel, in basic fuel, add 10～1000 weight part methyl alcohol at last and be deployed into Pans stove fuel of the present invention.

In the method for above-mentioned manufacturing Pans stove fuel, exhausted methyl alcohol when the methyl alcohol that is added during the preparation basic fuel preferably uses washing precipitate earlier, the commercially available methanol that re-uses in shortage is to reduce cost.

According to the Pans stove fuel that the inventive method is made, its Ran Shao Zhi ≧ 10000 kilocalorie/kilograms, Shui Fen ≦ 5%(is heavy), 50 ℃ of Ning Gu Dian ≦ –, pH value 7～8, lead content does not have.It can be used as fuel oil Pans stove special fuel, also can be used as civil kitchen range fuel, also can do Pans stove fuel peculiar to vessel.

The present invention utilizes black liquid to make the method for Pans stove fuel, xylogen in the black liquid all is extracted becomes the very high ammonia xylogen of combustion value, and the important component that acts as a fuel is utilized; Caustic soda in the black liquid all is converted into the sodium-acetate by product, is reclaimed with sedimentary form; Moisture content in the black liquid is also reclaimed by the component distillation major part, uses in the time of can be for the boiling paper making raw material.Therefore, the inventive method makes the resource component in the black liquor obtain utilization fully, not only turn waste into wealth, and environmental pollution that also Xian Zhu Minus is light, and also manufacturing process is easy, the Pans stove fuel product combustion value height that makes, and cost is lower.

Embodiment

Lift a concrete manufacturing example below and further specify the method that the present invention utilizes black liquid manufacturing Pans stove fuel.It is pointed out that method of the present invention never limit to the institute give an actual example.

1) extraction of xylogen is, in Baume concentration is among the black liquid 1000kg of 36-38 ' Be, add Glacial acetic acid 72kg earlier, be stirred to pH value 7-8, add commercially available Ammonium Acetate 229kg and industrial alcohol 1500kg again, seal 12 hours precipitations after stirring at normal temperatures, get the clear liquid component distillation and reclaim and obtain ammonia xylogen paste behind whole ethanol and the most water, throw out is that sodium-acetate reclaims as by product after with methanol wash;

2) preparation of Pans stove fuel is, in the ammonia xylogen paste 1000kg of last step acquisition, add 1000kg methyl alcohol and (add washing precipitate exhausted methyl alcohol earlier, the commercially available methanol of using again in shortage) and the 10kg dioxane, after-filtration stirs, make basic fuel, in basic fuel, add 200kg methyl alcohol at last and be deployed into Pans stove fuel of the present invention.

This example Pans stove fuel product after testing, its fuel value is 12000 kilocalorie/kilograms, moisture content is that 3 %(are heavy), zero pour is 50 ℃ of ﹣, the pH value is 7-8, lead content does not have.

Claims

1. a method of utilizing black liquid to make Pans stove fuel is made up of the extraction of xylogen and two step of the preparation process of Pans stove fuel, it is characterized in that:

2. according to the described method of utilizing black liquid to make Pans stove fuel of claim 1, it is characterized in that: exhausted methyl alcohol when the methyl alcohol that is added during the preparation basic fuel uses washing precipitate earlier, the commercially available methanol that re-uses in shortage.