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A kind of coal-water slurry additive and its preparation method and application

A coal-water slurry and additive technology, applied in the field of coal-water slurry additives, can solve the problems of large feeding volume, poor fluidity, easy to block transportation pipelines, etc., and achieve the effect of strong adaptability and accurate judgment

Active Publication Date: 2019-06-21
陕西立雅能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Coal water slurry additive is a chemical agent that can promote the uniform dispersion of the dispersed phase (coal particles in the coal water slurry) in the dispersion medium (water in the coal water slurry), and is a traditional Chinese medicine for the combustion, gasification and transportation of coal water slurry A kind of chemical additive used in large quantities, the current exploitation of petroleum cannot keep up with the use, and various countries are developing technologies to replace petroleum, and the process of replacing petroleum with high-quality coal has become a technical difficulty that all parties are striving to overcome. Among them, coal water slurry Additives play a pivotal role in the process of preparing coal-water slurry. If the existing additives for coal-water slurry are added to the equipment for producing coal-water slurry to make slurry, the concentration of the obtained coal slurry is too low and the fluidity is poor. It is easy to block the transportation pipeline during the process, and the amount of feed in the process of preparing coal-water slurry is relatively large, which increases the cost of pulping and reduces the production cost of the enterprise. Therefore, it is urgent to design an efficient and low-cost coal-water slurry additive

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  • A kind of coal-water slurry additive and its preparation method and application
  • A kind of coal-water slurry additive and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The coal water slurry additive in this embodiment is made of the following raw materials in mass percentage: 10% of β-naphthalene sulfonate sodium formaldehyde condensate, 30% of sodium lignosulfonate, and the balance is water.

[0034] The preparation method of the β-naphthalenesulfonate sodium formaldehyde condensate of the present embodiment may further comprise the steps:

[0035] Step 1, preparation of sodium β-naphthalene sulfonate: 2.5 tons of industrial naphthalene is placed in reactor 1, sealed reactor 1, and melted at 135°C. After industrial naphthalene is completely melted, 1.6 tons of concentrated Sulfuric acid (national standard) is added to the reaction kettle 1 at a feeding rate of 0.8 tons / hour for sulfonation reaction with industrial naphthalene. After all the concentrated sulfuric acid is added, the temperature is raised to 165°C by steam and the reaction is continued for 2 hours, and then 1 ton of water is added. Carry out hydrolysis reaction, cool do...

Embodiment 2

[0049] The coal water slurry additive in this embodiment is made of the following raw materials in mass percentage: 30% of β-naphthalene sulfonate sodium formaldehyde condensate, 10% of sodium lignosulfonate, and the balance is water.

[0050] The preparation method of the β-naphthalenesulfonate sodium formaldehyde condensate of the present embodiment may further comprise the steps:

[0051] Step 1, preparation of β-naphthalene sodium sulfonate: 2.5 tons of industrial naphthalene is placed in reactor 1 and melted under the condition of 130° C., after industrial naphthalene is completely melted, 1.5 tons of vitriol oil (national standard) Add the feed rate of 0.5 tons / hour to the reaction kettle 1 for sulfonation reaction with industrial naphthalene. After adding all the concentrated sulfuric acid, raise the temperature to 160°C and continue stirring for 2 hours, then add 0.875 tons of water to carry out the hydrolysis reaction, and the hydrolysis reaction is over. Then cool do...

Embodiment 3

[0059] The coal water slurry additive in this embodiment is made of the following raw materials in mass percentage: 20% of β-naphthalene sulfonate sodium formaldehyde condensate, 20% of sodium lignosulfonate, and the balance is water.

[0060] The preparation method of the β-naphthalenesulfonate sodium formaldehyde condensate of the present embodiment may further comprise the steps:

[0061] Step 1, preparation of β-naphthalene sodium sulfonate: 2.5 tons of industrial naphthalene is placed in reactor 1, and it is melted under the condition of 140°C at a temperature. After the industrial naphthalene is completely melted, 1.65 tons of concentrated sulfuric acid (national standard ) was added to the reaction kettle 1 at a feed rate of 1 ton / hour to carry out sulfonation reaction with industrial naphthalene. After all the concentrated sulfuric acid was added, the temperature was raised to 170° C. and the reaction was continued for 1 hour, and then 1.075 tons of water was added to c...

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Abstract

The invention discloses a water coal slurry additive which is prepared from a beta-naphthalene sulfonic acid sodium condensation product, sodium lignosulfonate and water. The invention further discloses a method for preparing the water coal slurry additive. The method comprises the following steps: uniformly mixing the beta-naphthalene sulfonic acid sodium condensation product, the sodium lignosulfonate and the water in a mixing machine, and screening till 300 meshes, so as to obtain the water coal slurry additive. The invention further provides a method for preparing coal water slurry from the water coal slurry additive. The method comprises the following steps: uniformly stirring the water coal slurry additive, the coal powder and water, so as to obtain water coal slurry, wherein the mass content of the water coal slurry additive in the water coal slurry is 0.1-0.15%. The beta-naphthalene sulfonic acid sodium condensation product in the water coal slurry additive is relatively good in adaptability to coal, and due to the addition of the beta-naphthalene sulfonic acid sodium condensation product for preparing the water coal slurry additive and the water coal slurry, a relatively small amount is used, no stabilizer is needed, and the water coal slurry can be kept stably.

Description

technical field [0001] The invention belongs to the technical field of coal-water slurry additives, and in particular relates to a coal-water slurry additive and its preparation method and application. Background technique [0002] Coal water slurry additive is a chemical agent that can promote the uniform dispersion of the dispersed phase (coal particles in the coal water slurry) in the dispersion medium (water in the coal water slurry), and is a traditional Chinese medicine for the combustion, gasification and transportation of coal water slurry A kind of chemical additive used in large quantities, the current exploitation of petroleum cannot keep up with the use, and various countries are developing technologies to replace petroleum, and the process of replacing petroleum with high-quality coal has become a technical difficulty that all parties are striving to overcome. Among them, coal water slurry Additives play a pivotal role in the process of preparing coal-water slur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/24C10L1/32
Inventor 贾良辉吴勇刘超
Owner 陕西立雅能源科技有限公司
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