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

A technology of waste lye and sulfonated alkali is applied in the field of resource utilization and environmental protection, which can solve the problems of waste of resources and pollute the environment, and achieve the effect of improving product performance.

Inactive Publication Date: 2020-04-21
萧县沃德化工科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these waste lye cannot be effectively treated and discharged directly, it will not only seriously pollute the environment, but also cause a lot of waste of resources

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A gas-liquid two-phase sulfonated alkali pulping waste lye additive for preparing coal-water slurry, which is made of the following raw materials in parts by weight: 85 parts of waste lye, 40 parts of sulfur dioxide, 66 parts of phenolic waste water, and 6.5 parts of hydrogen peroxide Parts, 45 parts of formaldehyde, 10 parts of liquid caustic soda.

[0025] The above gas-liquid two-phase sulfonated alkali pulping waste caustic liquor preparation method for preparing coal-water slurry additives comprises the following steps:

[0026] (1) Add spent lye to the reaction kettle, heat to 55°C, and slowly feed sulfur dioxide while stirring for 25 minutes until the feeding is completed;

[0027] (2) Add phenolic waste water and hydrogen peroxide to the reactor, raise the temperature to 75°C, keep warm for 1.5h, continue to add formaldehyde dropwise to the reactor for 25min, after the dropwise addition, keep warm for 2.5h, and use liquid caustic soda Adjust the pH to 10 to obt...

Embodiment 2

[0029] A gas-liquid two-phase sulfonated alkali pulping waste lye additive for preparing coal-water slurry, which is made of the following raw materials in parts by weight: 80 parts of waste lye, 45 parts of sulfur dioxide, 85 parts of phenolic waste water, and 8.0 parts of hydrogen peroxide Parts, 26 parts of formaldehyde, 12 parts of liquid caustic soda.

[0030] The above gas-liquid two-phase sulfonated alkali pulping waste caustic liquor preparation method for preparing coal-water slurry additives comprises the following steps:

[0031] (1) Add the spent lye to the reaction kettle, heat to 50°C, and slowly feed in sulfur dioxide while stirring, and the feeding time is 20 minutes until the feeding is completed;

[0032] (2) Add phenolic waste water and hydrogen peroxide to the reactor, raise the temperature to 70°C, keep it warm for 1 hour, continue to add formaldehyde dropwise to the reactor for 20 minutes, after the dropwise addition, keep it warm for 2 hours, and adjust ...

Embodiment 3

[0034] A gas-liquid two-phase sulfonated alkali pulping waste lye additive for preparing coal-water slurry, which is made of the following raw materials in parts by weight: 85 parts of waste lye, 35 parts of sulfur dioxide, 80 parts of phenolic waste water, and 7.5 parts of hydrogen peroxide Parts, 34 parts of formaldehyde, 15 parts of liquid caustic soda.

[0035] The above gas-liquid two-phase sulfonated alkali pulping waste caustic liquor preparation method for preparing coal-water slurry additives comprises the following steps:

[0036] (1) Add spent lye to the reaction kettle, heat to 60°C, and slowly feed sulfur dioxide while stirring for 30 minutes until the feeding is completed;

[0037] (2) Add phenolic waste water and hydrogen peroxide to the reactor, raise the temperature to 80°C, keep it warm for 2 hours, continue to add formaldehyde dropwise to the reactor for 30 minutes, after the dropwise addition, keep it warm for 3 hours, and adjust the pH with liquid alkali ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32C10L1/24
CPCC10L1/24C10L1/326
Inventor 马丽涛李锋邢凯彭城宋宝乔琼琼
Owner 萧县沃德化工科技有限公司
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