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Alkylation waste acid treatment apparatus and method

A technology for alkylation waste acid and treatment equipment, which is applied in the chemical industry, sustainable manufacturing/processing, climate sustainability, etc. It can solve the problems of unplanned shutdown of sulfur plants, low concentration of sulfuric acid, pollution, etc., and achieve equipment investment And the effect of reducing the corresponding operating cost, simplifying the introduction device, and simplifying the structure of the equipment

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process needs to provide a high temperature heat source, which increases the consumption of fuel and increases the relative cost
Moreover, there are insurmountable defects in the pyrolysis method: the sulfuric acid nozzle, one of the core equipment of the cracking furnace, is easily blocked, and the nozzle needs to be cleaned regularly during production, which affects the stable operation of the device and the maintenance cost of the device is high
Its disadvantages are: firstly, the concentration of sulfuric acid produced in the hydrolysis separation process of this process is low, and it is still feasible for the treatment of low-yield alkylation waste sulfuric acid, but the device with higher yield cannot handle it, and cannot achieve high yield
The second is to generate a large amount of industrial waste water, resulting in secondary pollution
The disadvantages are that the polymerized oil separated during the acid-base neutralization reaction of the process is not treated, which is still a source of pollution
Second, the ammonium sulfate and phosphate fertilizers produced from waste acid are dark in color and have a strong pungent smell. Moreover, the domestic nitrogen fertilizer market is saturated, and it is difficult for ammonium sulfate made from waste acid to enter the market.
In this patent, the waste acid, acid gas, air or oxygen, and gas enter the acid gas burner together for combustion. In the actual operation of this patent, the waste acid is prone to incomplete cracking, which leads to the burner of the sulfur production system is easy to coke. Once it occurs Coking of waste acid will affect the smooth operation of the entire sulfur plant, and more seriously, it will lead to unplanned shutdown of the sulfur plant

Method used

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  • Alkylation waste acid treatment apparatus and method
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  • Alkylation waste acid treatment apparatus and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The device is a 40kt / a sulfur recovery device, and the treatment method of the device is as follows:

[0054] 1) The alkylation waste acid in the alkylation waste acid input pipe 3 is input into the sulfur furnace 1 through the waste acid spray gun 5, the amount of waste acid injection is 1.2t / h, and the acid gas in the acid gas input pipe 2 passes through the acid gas The gas burner 4 enters the sulfur making furnace 1, controls the temperature of the sulfur making furnace 1 to 1000°C, and the process gas generated by the reaction is output through the gas output port of the sulfur making furnace 1; the H in the acid gas 2 S volume percentage concentration 57%; Alkylation waste acid comprises the following components of sulfuric acid 85 wt %, organic matter 15 wt %; the process gas composition of sulfur furnace 1 gas output end is: H 2 S5.53%, SO 2 2.64%, SO 3 122ppm, organic sulfur 0.25%, CO 2 15.12%, the rest is sulfur vapor, saturated water vapor and nitrogen;

...

Embodiment 2

[0058] The device is an 80kt / a sulfur recovery device, and the treatment method of the device is as follows:

[0059] 1) The alkylation waste acid in the alkylation waste acid input pipe 3 is input into the sulfur furnace 1 through the waste acid spray gun 5, the amount of waste acid injection is 1.5t / h, and the acid gas in the acid gas input pipe 2 passes through the acid gas The gas burner 4 enters the sulfur making furnace 1, and the temperature of the sulfur making furnace 1 is controlled to be 1050°C, and the process gas generated by the reaction is output through the gas output port of the sulfur making furnace 1; the H in the acid gas 2 S volume percent concentration 72%; Alkylation waste acid comprises the following concentration of component sulfuric acid 90wt%, organic matter 10wt%; The process gas composition of sulfur furnace 1 gas output end is: H 2 S4.25%, SO 2 1.95%, SO 3 185ppm, organic sulfur 0.33%, CO 2 13.87%, the rest is sulfur vapor, saturated water vap...

Embodiment 3

[0063] The device is an 80kt / a sulfur recovery device, and the treatment method of the device is as follows:

[0064] 1) The alkylation waste acid in the alkylation waste acid input pipe 3 is input into the sulfur furnace 1 through the waste acid spray gun 5, the amount of waste acid injection is 2.0t / h, and the acid gas in the acid gas input pipe 2 passes through the acid gas The gas burner 4 enters the sulfur making furnace 1, controls the temperature of the sulfur making furnace 1 to 1089°C, and the process gas generated by the reaction is output through the gas output port of the sulfur making furnace 1; the H in the acid gas 2 S volume percentage concentration 80%; Alkylation waste acid comprises the following concentration of components sulfuric acid 95wt%, organic matter 5wt%; The process gas composition of sulfur furnace 1 gas output end is: H 2 S5.64%, SO 2 2.83%, SO 3 337ppm, organic sulfur 0.72%, CO 2 15.56%, the rest is sulfur vapor, saturated water vapor and ni...

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Abstract

The invention relates to an alkylation waste acid treatment apparatus and method, and belongs to the technical field of alkylation waste acid treatment. An acidic gas combustor (4) is arranged between a furnace production furnace (1) and an acidic gas input tube (2), a waste acid spray gun (5) is arranged between the furnace production furnace (1) and an alkylation waste acid input tube (3), and the waste acid spray gun (5) is connected with the furnace production furnace (1) through an automatic return sealing mechanism (9) used for preventing gas leakage; and the gas output end of the furnace production furnace (1) is provided with a waste heat boiler (6), and the waste heat boiler (6) is connected with a sulfur recovery unit through a pipeline. The alkylation waste acid treatment apparatus has the advantages of compact structure, complete cracking, less investment, low operating cost, environmental protection, energy saving, and realization of continuous and stable running of a whole sulfur production device through online replacement of the waste acid spray gun by the automatic return sealing mechanism.

Description

technical field [0001] An alkylation waste acid treatment device and method belong to the technical field of alkylation waste acid treatment. Background technique [0002] Alkylation is the reaction of isobutane and olefins under the action of a strong acid catalyst to produce alkylate oil. Alkylate oil has high octane number, low sensitivity, no sulfur, aromatics, olefins, ideal volatility and clean combustion, and is an ideal blending component of aviation gasoline and motor gasoline. With the urgent need to upgrade the quality of gasoline and the increasingly high environmental protection requirements, the importance of alkylation has become increasingly prominent. Most of my country's refineries use sulfuric acid alkylation process with concentrated sulfuric acid as a catalyst, and 80~100kg of alkylation waste acid is produced for every 1 ton of hydrocarbonized oil produced. Alkylation waste acid is referred to as waste acid for short. It is a colloidal liquid with hig...

Claims

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Application Information

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IPC IPC(8): C01B17/06
CPCY02P20/10Y02P20/129
Inventor 刘爱华曹东学徐翠翠达建文许金山王建华刘剑利
Owner CHINA PETROLEUM & CHEM CORP
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