Gas-liquid two-phase sulfonated alkaline pulping waste lye to prepare coal-water slurry additive

Abstract

The invention provides a gas-liquid two-phase sulfonated alkali method for preparing a coal water slurry additive from slurry-preparing waste alkali liquor and relates to the fields of resource utilization and environmental protection. The coal water slurry additive comprises the following raw materials in parts by weight: 80-90 parts of waste alkali liquor, 40-48 parts of sulfur dioxide, 65-85 parts of phenol wastewater, 5-9 parts of hydrogen peroxide, 25-45 parts of formaldehyde and 10-20 parts of liquid caustic soda. The used sulfonated alkali method comprises the following steps: adding the waste alkali liquor into a reactor, heating to a temperature of 50-60 DEG C, slowly introducing sulfur dioxide while stirring, and introducing for 20-30 minutes until introduction is completed; adding phenol wastewater and hydrogen peroxide into the reactor, raising the temperature to 70-80 DEG C, maintaining the temperature for 1-2 hours, continuously dropping formaldehyde into the reactor for20-30 minutes, maintaining the temperature for 2-3 hours after dropping completion, and regulating the pH value to be 10 with liquid caustic soda, thereby obtaining the product. According to the method for preparing the coal water slurry additive provided by the invention, the waste alkali liquor and phenol wastewater is recycled for preparing the coal water slurry additive, and recycling and environmental protection can be realized.

Description

technical field

[0001] The invention relates to the fields of resource utilization and environmental protection, in particular to an additive for preparing coal-water slurry from gas-liquid two-phase sulfonated alkaline pulping waste lye. Background technique

[0002] Coal-water slurry is a new type of clean liquid fuel developed in the 1970s during the oil crisis that replaced oil with coal. It is made of about 70% of coal, about 30% of water and about 1% of additives through a certain process, so that it has good fluidity and stability, and it is atomized by pumping to achieve stability Burning effect. Therefore, coal water slurry is an ideal clean fuel, and can be widely used in various boilers as fuel. During the preparation of coal water slurry, chemical additives are added, mainly to change the surface properties of coal particles so that they can be dispersed in water, so that the coal slurry has good fluidity and stability.

[0003] Phenolic wastewater has high co...

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