Water coal slurry and preparation method thereof
A technology of coal-water slurry and aqueous solution, which is applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve the problems of difficult transportation and undisclosed coal-water slurry, so as to simplify the preparation process and avoid difficulties in transportation and use , the effect of reducing production costs
Active Publication Date: 2012-11-14
ZHEJIANG UNIV +1
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Problems solved by technology
[0006] The solid product is currently used directly for incineration, but it is difficult to transport because of its light weight and fine particle size.
[0007] At present, the method of preparing coal-water slurry by plasma cracking coal solid by-products has not yet been disclosed.
Method used
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Embodiment 1
[0031] Embodiment 1, a kind of preparation method of coal water slurry, carry out following steps successively:
[0032] 1) Using an electronic balance (accurate to 0.0001g), weigh 100.0 g of solid by-products of plasma cracking coal, 1.2 g of sodium lignosulfonate, 1.0 g of carboxymethyl cellulose, and 53.0 g of water;
[0033] 2), carboxymethylcellulose and water are placed in a conical flask, and magnetically stirred until completely dissolved to obtain an aqueous stabilizer solution;
[0034] 3) Pour the plasma cracking coal solid by-product, lignosulfonic acid sodium salt and stabilizer aqueous solution into a steel tank equipped with a booster electric stirrer; Stir for 30 minutes to obtain coal water slurry.
[0035] The viscosity of the coal water slurry is 623.7mPas, the concentration is 65.4%, and the stability is as follows: soft precipitation occurs after 39d, and dead (hard) precipitation occurs after 45d.
[0036] Embodiment 2~embodiment 5, change the dispersan...
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Abstract
The invention discloses water coal slurry which comprises a solid by-product of plasma pyrolysis coal, water, stabilizer and dispersant by the weight ratio of solid by-product of plasma pyrolysis coal / (solid by-product of plasma pyrolysis coal+water) =50 to 65.4 percent, 0.1 to 2 percent weight ratio of the stabilizer to the solid by-product of plasma pyrolysis coal, and 0.1 to 2 percent weight ratio of the dispersant and the solid by-product of plasma pyrolysis coal. The invention also provides the preparation method of the water coal slurry, which comprises the following steps that: 1) thestabilizer is added into the water to be stirred until being dissolved, to obtain the stabilizer water solution; and 2) the solid by-product of plasma pyrolysis coal, the dispersant and the stabilizer water solution are uniformly stirred, to obtain the water coal slurry. The water coal slurry is characterized by good stability, high concentration and low viscosity.
Description
technical field [0001] The invention relates to a method for preparing coal-water slurry, in particular to a method for preparing coal-water slurry by using plasma cracking coal solid by-products as raw materials and using different dispersants. Background technique [0002] The preparation process of coal water slurry is divided into two types: dry pulping and wet pulping. Dry pulping is to crush the coal used for pulping, dry grind it to the product fineness and particle size distribution required by the user, and then add water Kneading with dispersant and pulping in a mixer; wet pulping is to add coal, water and additives to the mill, and the final product is coal water slurry. [0003] In the pulping process, the particle size distribution of coal is an important factor in determining the concentration and fluidity of coal-water slurry. In order to prepare a high-concentration coal-water slurry, it is required that the content of each particle size of pulverized coal p...
Claims
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IPC IPC(8): C10L1/32C10L1/10C10L1/24C10L1/198
Inventor 钱超陈汉庚陈新志何潮洪任其龙陈丰秋吴忠标荣冈
Owner ZHEJIANG UNIV