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Preparation method of high-concentration mixed coal water slurry additive

A technology for preparing additives and mixing water, which is applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of increasing the difficulty of making coal-water slurry, high efficiency and high price, and poor performance at low cost, so as to promote the surface tension of coal Decrease, good stability and dispersibility, enhance the effect of hydrophilicity

Active Publication Date: 2020-08-14
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many kinds of coal-water slurry additives in use in my country, and the quality is uneven, and the cost performance is not high. They are either high-efficiency and high-priced, or cheap and poor in performance. It is difficult to meet the increasingly competitive industrial development.
In addition, with the increase of environmental protection pressure, coal-water slurry gasification equipment often uses one or more of gray water from the gasification system, steam condensate water, production wastewater from other production equipment, biochemical water, and waste alkaline water when making pulp. Several partial or complete replacement processes for desalinated water greatly increase the difficulty of making coal water slurry
The single use of a certain component of the CWS additive can no longer meet the development requirements of the CWS gasification device. Therefore, we must develop a cost-effective and highly adaptable composite CWS additive to deal with The increasingly complex working conditions of the pulping system of the coal-water slurry gasification device increase the concentration of the coal-water slurry, reduce the viscosity of the coal-water slurry, improve the fluidity of the coal-water slurry, and expand the range of coal gasification slurry

Method used

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  • Preparation method of high-concentration mixed coal water slurry additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing a high-concentration mixed coal-water slurry additive, comprising the following steps:

[0024] Step 1: Weigh 60g of potassium lignosulfonate, 10g of polyethyleneimine and 1g of ammonium chloride, add 100ml of water, and react at 40±5°C for 1h;

[0025] Step 2: After the first step of reaction, cool down to 30±5°C, add 6g of aniline and stir for 0.5h, add 30g of polyethylene glycol 200 to react for 2h, the reaction is completed, and component A is obtained;

[0026] Step 3: Weigh 10g of β-naphthalenesulfonate sodium formaldehyde condensation product into the reactor, add 3g of pyridine and 100ml of water, then dropwise add 10g of triethanolamine dodecylsulfate, and react at 30°C for 2h to obtain the component B;

[0027] Step 4: Mix component A and component B, adjust the pH to 7-8 with 10% sodium hydroxide, concentrate under reduced pressure, and freeze-dry to obtain solid powder of the additive.

Embodiment 2

[0029] A method for preparing a high-concentration mixed coal-water slurry additive, comprising the following steps:

[0030] Step 1: Weigh 70g of sodium lignosulfonate, 15g of polyethyleneimine by weight and 2g of ammonium chloride, add 150ml of water, and react at 40±5°C for 2 hours;

[0031] Step 2: After the first reaction, cool down to 35±5°C, add 7g of aniline and stir for 0.8h, add 35g of polyethylene glycol 600 and react for 2.5h, the reaction is completed, and component A is obtained;

[0032] Step 3: Weigh 15g of β-naphthalenesulfonate sodium formaldehyde condensation product into the reactor, add 4g of pyridine and 100ml of water, then dropwise add 12g of triethanolamine dodecylsulfate, and react at 45±5°C for 3h to obtain the compound share B;

[0033] Step 4: Mix component A and component B, adjust the pH to 7-8 with ammonia water, concentrate under reduced pressure, and freeze-dry to obtain solid powder of the additive.

Embodiment 3

[0035] A method for preparing a high-concentration mixed coal-water slurry additive, comprising the following steps:

[0036] Step 1: Weigh 80g of sodium lignosulfonate, 20g of polyethyleneimine and 3g of ammonium chloride, add 200ml of water, and react at 50°C for 3h;

[0037] Step 2: After the first step of reaction, cool down to 40°C, add 8g of aniline and stir for 1 hour, add 40g of polyethylene glycol 1000 for reaction for 3 hours, and the reaction is completed to obtain component A;

[0038] Step 3: Weigh 20g of α-naphthalenesulfonate sodium formaldehyde condensation product into the reactor, add 5g of pyridine and 150ml of water, then dropwise add 15g of triethanolamine dodecylsulfate, and react at 60°C for 4h to obtain component B ;

[0039] Step 4: Mix component A and component B, adjust the pH to 7-8 with 10% potassium hydroxide, concentrate under reduced pressure, and freeze-dry to obtain solid powder of the additive.

[0040] In addition, commercially available s...

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Abstract

A preparation method of a high-concentration mixed coal water slurry additive is provided. The preparation method comprises the following steps: modifying lignosulfonate with polyethyleneimine and polyethylene glycol to obtain a component A; modifying a sodium naphthalenesulfonate-formaldehyde condensate with triethanolamine lauryl sulfate to obtain a component B; mixing the component A and the component B; adjusting the pH value to 7-8 with an alkali, and drying to obtain the solid additive. The additive obtained by the invention can enhance the hydrophilicity of the surface of coal water slurry, reduce the interfacial tension of coal water, fully wet coal particles, uniformly crush the coal particles in a small amount of water, improve the concentration of the coal water slurry, promotethe reduction of the surface tension of coal, reduce the coalescence among coal powder, enhance the flowability of the coal water slurry, and enhance the stability due to the characteristics of a molecular structure.

Description

technical field [0001] The invention belongs to the technical field of additive preparation, and in particular relates to a method for preparing a high-concentration mixed coal-water slurry additive. Background technique [0002] Coal water slurry is a new type of coal-based fluid clean and environmentally friendly fuel prepared by physical methods, and it is also a new type of raw material for producing synthetic gas from coal. This technology improves the utilization rate of coal resources through deep processing and rational utilization of coal resources. [0003] In the raw material production cost of coal water slurry, besides 60%-70% coal and 30%-40% water, the additives for improving the performance of coal water slurry constitute the second largest cost factor of coal water slurry. CWS additives have a direct impact on key indicators such as viscosity, concentration, stability, and fluidity of CWS. Therefore, reducing the cost of CWS additives and improving their ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10L1/24
CPCC10L1/326C10L1/143C10L1/2462C10L1/2437
Inventor 白东洁潘勇
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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