Alkylated waste acid cracking technology adopting sulphur as fuel

A technology for alkylating waste acid and sulfur, which is applied in the chemical industry, sulfur compounds, sulfur dioxide/sulfurous acid, etc., and can solve the problems of increasing the load of the acid making system and waste discharge, etc.

Inactive Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combustion of these gaseous fuels produces large amounts of CO 2 and H 2 O, increasing the load of the subsequent acid system, and the moisture in the flue gas cannot be balanced to form dilute acid that needs to be discharged, resulting in new waste discharge

Method used

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  • Alkylated waste acid cracking technology adopting sulphur as fuel

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Embodiment

[0011] Example: such as figure 1 As shown, the present embodiment uses sulfur as the fuel alkylation waste acid cracking process including:

[0012] The liquid sulfur in the liquid sulfur underground tank (9) is injected into the cracking furnace (1) together with the air (~220°C) preheated by the air preheater (3) for combustion, and the temperature in the furnace is controlled at about 1000-1100°C . The waste sulfuric acid from the waste acid underground tank (10) is sprayed into the waste acid cracking furnace (1) for pyrolysis. 1000-1100°C SO from cracking furnace (1) 2 Furnace gas, after heat removal through the waste heat boiler (2), the temperature drops to about 450°C, and then enters the air preheater (3), after the temperature of the furnace gas is reduced from 450°C to about 300°C, the furnace gas enters the purification section Power Wave Scrubber (4). At the same time, the air that reacts with the liquid sulfur in the furnace is preheated by the air preheater ...

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Abstract

The invention discloses an alkylated waste acid cracking technology adopting sulphur as fuel and especially a production technology of sulfuric acid by alkylated waste acid cracking in high-temperature environment generated by sulphur combustion. The technology comprises the following steps: cracking the waste sulfuric acid in high-temperature environment, recovering the heat from an exhaust-heat boiler, performing closed acid scrubbing and purifying, transforming for two times, absorbing for two times, absorbing the tail gas and so on, so that qualified sulfuric acid product is produced. Compared with commonly used gaseous fuels, such as the natural gas, the liquefied gas and the like, the fuel sulphur can be transformed into the product in the alkylated cracking technology, so that the device operation cost is greatly reduced; dilute acid efflux caused by H2O generated by gaseous fuel combustion is avoided, so that new waste discharge is thereby avoided; moreover, the alkylated waste acid cracking technology also reduces CO2 discharge generated by gaseous fuel combustion.

Description

technical field [0001] The invention relates to an alkylation waste acid cracking process using sulfur as fuel. Background technique [0002] With the upgrading of gasoline quality in my country, the demand for high-grade gasoline continues to increase, and the alkylation unit that produces high-grade gasoline will produce waste sulfuric acid. For a long time, the discharge and treatment of alkylation waste sulfuric acid has been an environmental protection problem. At present, several main waste acid treatment processes in China include: production of white carbon black and petroleum antirust agent, ammonium sulfate and antirust agent, incineration and cracking to produce industrial sulfuric acid, and decolorization of activated carbon to produce 25% (W) dilute sulfuric acid. The production of white carbon black from waste acid is not only a complicated process, but the raw material sodium silicate is difficult to obtain, and there is no market for the product white carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/48C01B17/76
CPCY02P20/10Y02P20/129
Inventor 罗娟魏兰江碧清徐晓燕李颖吴英来张雪杰李皓瑜
Owner CHINA PETROLEUM & CHEM CORP
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