Treatment technology of producing sulfuric acid from alkylated spent sulfuric acid through high temperature decomposition
A technology of alkylating waste sulfuric acid and pyrolysis, which is applied in the direction of sulfur trioxide/sulfuric acid, etc., can solve the problems of not introducing the process in detail, and achieve the effect of avoiding secondary pollution
Inactive Publication Date: 2009-09-09
PETROCHINA CO LTD
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Problems solved by technology
The British patent GB596386 only introduces the method of atomizing the acid and spraying the acid mist into the heating furnace, and then thermally decomposing the waste sulfuric acid, without introducing the next step in detail
Method used
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[0045] Example 3 Product Quality
[0046] concentration% Measured value in V301, V302 dry 95.5 absorb 98.0
example 4
[0047] Example 4 Energy consumption index of device operation
[0048]
[0049] measured value measured value measured value 1 fresh water 15.04 12.05 2.17 2 Electricity 415.8 333 99.9 3 1.0MPa steam -5.63 -4.51 -356.25 4 deoxygenated water 6.17 4.94 45.45 5 gas 1.03 0.83 830 total 621.27
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The invention relates to high-temperature cracking of waste sulfuric acid, adiabatic humidification and pickling purification, and two-transfer and two-suction processes, that is, the process of producing sulfuric acid by high-temperature cracking of alkylated waste sulfuric acid, which is divided into waste acid cracking and purification section, transformation section and dry suction section. Partly, through the waste acid treatment process, the waste sulfuric acid is cracked at a high temperature of 1000-1100 °C, and after pickling purification, double contact conversion and double absorption, qualified sulfuric acid products are produced for the alkylation unit. At the same time, the purpose of protecting the environment is achieved. The raw material used in this process is a single 85-90% alkylated waste sulfuric acid, and the recovery rate of waste sulfuric acid can reach 90%.
Description
technical field [0001] The invention relates to pyrolysis of waste sulfuric acid at high temperature, adiabatic humidification and pickling purification, and two-turn and two-suction processes. Specifically, it provides a process that can protect the environment, and can produce 98% qualified concentrated sulfuric acid at the same time, which can be used for alkylation again. Alkylation waste sulfuric acid that realizes circulation with the alkylation unit is produced by pyrolysis to produce sulfuric acid treatment process. Background technique [0002] At present, there are many methods for waste acid treatment, among which there are three main methods: ① thermal cracking of waste sulfuric acid to produce SO 2 , SO 3 , sulfuric acid or recycled sulfur S. ②Waste sulfuric acid is diluted, ionized or hydrolyzed, and then separated to remove organic impurities to obtain pure sulfuric acid. ③Use the waste sulfuric acid and waste ammonia water of the alkylation unit to produce...
Claims
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IPC IPC(8): C01B17/69
Inventor 钱新华于凤和夏丽萍曾严罗强李宏冰高卫亭张宏达隋新
Owner PETROCHINA CO LTD
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