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Environment-friendly process for preparing carbon black by utilizing tar

A carbon black, environmentally friendly technology, applied in the separation of dispersed particles, chemical instruments and methods, fibrous fillers, etc., can solve problems such as environmental pollution, and achieve the effect of reducing pollutants

Active Publication Date: 2015-05-20
NINGBO DETAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of carbon black manufacturing, tail gas will be produced. The tail gas contains a large amount of carbon dioxide, a small amount of methane, nitrogen oxides, sulfides, and carbon black dust that has not been collected. If it is discharged directly, it will cause serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: After preheating, the high-temperature air with a temperature of 800°C and the preheated combustion oil react, mix and burn in the reaction furnace to generate a high-temperature combustion airflow with a temperature of about 1960°C. After the high-temperature combustion airflow flows into the throat, the Aromatic hydrocarbons with a temperature between 170°C and atomized are sprayed into the throat. The aromatic hydrocarbons are mixed with the high-temperature combustion airflow in the reaction furnace chamber and cracked rapidly to produce carbon black flue gas. After the carbon black flue gas enters the cooling section, cooling water is sprayed in the cooling section. After the carbon black flue gas is quenched, the temperature drops to 950°C, and ammonia water is sprayed into the cooling section at this time. The amount of ammonia injected needs to follow the ratio of ammonia to nitrogen molar ratio (NSR) 1.5. After leaving the cooling section, the carbon...

Embodiment 2

[0014] Example 2: After preheating, the high-temperature air with a temperature of 800°C and the preheated combustion oil react, mix and burn in the reaction furnace to generate a high-temperature combustion airflow with a temperature of about 1960°C. After the high-temperature combustion airflow flows into the throat, the The atomized petroleum-based hydrocarbons with a temperature between 180°C are sprayed into the throat, and the petroleum-based hydrocarbons are mixed with the high-temperature combustion airflow in the reaction furnace chamber and cracked rapidly to produce carbon black flue gas. After the carbon black fume enters the cooling section, cooling water is sprayed in the cooling section. After the carbon black fume is quenched, the temperature drops to 950°C. At this time, the mixture of ammonia water and ammonium bicarbonate is sprayed into the cooling section. The amount of ammonia water injected needs to follow the ratio of ammonia nitrogen molar ratio (NSR) 1...

Embodiment 3

[0015]Example 3: After preheating, the high-temperature air with a temperature of 800°C and the preheated combustion oil react, mix and burn in the reaction furnace to generate a high-temperature combustion airflow with a temperature of about 1960°C. After the high-temperature combustion airflow flows into the throat, the Atomized aliphatic saturated hydrocarbons with a temperature between 190°C and atomized are injected into the throat. The aliphatic saturated hydrocarbons are mixed with high-temperature combustion airflow in the reaction furnace chamber and cracked rapidly to produce carbon black flue gas. After the carbon black fume enters the cooling section, cooling water is sprayed in the cooling section. After the carbon black fume is quenched, the temperature drops to 950°C. At this time, the mixture of urea and ammonium bicarbonate is sprayed into the cooling section. The amount of ammonia water injected needs to follow the ratio of ammonia nitrogen molar ratio (NSR) 2...

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PUM

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Abstract

The invention relates to an environment-friendly process for preparing carbon black by utilizing tar, and relates to a tail gas denitrification process in a carbon black production process. The tail gas denitrification process needs to utilize a reaction device, a preheating device and a granulating device; the reaction device comprises a reaction furnace, a venturi, a reaction chamber and a cooling section; the preheating device comprises an air preheater and an oil preheater; and the granulating device comprises a carbon black grading device, the granulating device and a drying device. The tail gas denitrification process mainly comprises four steps of feed gas pyrolysis, carbon black smoke gas high-temperature denitrification, preheating of high-temperature carbon black smoke gas on air and an oil material, carbon black smoke gas separation and carbon black granulation respectively. Compared with the prior art, the tail gas denitrification process disclosed by the invention can perform denitrification treatment on the carbon black smoke gas at the manufacturing stage of the carbon black, is free of influencing the formation of the carbon black and can be used for transforming nitrogen oxide contained in a tail gas into nitrogen and decreasing the pollutants contained in the tail gas.

Description

technical field [0001] The invention relates to a production process of carbon black, in particular to a tail gas denitrification process in the production process of carbon black. Background technique [0002] Carbon black is a light, loose and very fine black powder whose main component is amorphous carbon. It has a very large surface area ranging from 10-3000m2 / g. The product obtained by incomplete combustion or thermal decomposition (with greater adhesion). Carbon black has a wide range of applications. It can be used as a black dye to make Chinese ink, printing ink, paint, etc. It is also used as a reinforcing agent for rubber and plays an important role in the industrial field. Traditionally, in the carbon black production process, air and fuel are burned in a reactor, and the raw materials are sprayed into the burning flame after being atomized, and carbon black is generated by high-temperature pyrolysis. Carbon black is suspended in the gas to form flue gas. After...

Claims

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Application Information

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IPC IPC(8): C09C1/50B01D53/79B01D53/56
Inventor 黄锡甫朱社教周银春
Owner NINGBO DETAI CHEM
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