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Method for preparing sulfur and processing tail gas by taking ammonium bisulfite as intermediate

An ammonium bisulfite and tail gas treatment technology, which is applied in the preparation/purification of sulfur, separation methods, chemical instruments and methods, etc., can solve the problems of high operating cost and energy consumption, long process flow, large construction investment, etc. Reduced operating costs and energy consumption, the effect of shortened processes

Active Publication Date: 2012-11-21
SHANDONG SUNWAY PETROCHEMICAL ENGINEERING CO LTD
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Problems solved by technology

However, the process is long, the construction investment is large, the operating cost and energy consumption are high

Method used

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Embodiment Construction

[0026] A method for making sulfur and tail gas treatment using ammonium bisulfite as an intermediate is characterized in that it comprises the steps:

[0027] 1) adopt prior art to the NH of sour water stripping unit 3 Separation to obtain gaseous ammonia or ammonia water;

[0028] 2) The tail gas of the Claus sulfur recovery unit is incinerated to remove all non-SO4 in the tail gas 2 Sulfide is oxidized to SO 2 ;

[0029] 3) The tail gas after incineration and the NH separated from the acidic water stripping unit 3 Reacts in liquid phase to form NH 4 HSO 3 and (NH 4 ) 2 SO 3 , to purify exhaust emissions;

[0030] 4) NH 4 HSO 3 and (NH 4 ) 2 SO 3 The aqueous solution is atomized and sprayed into the reaction furnace of the Claus sulfur recovery unit, and the NH after thermal decomposition 3 is decomposed into N 2 , SO 2 Participate in the Claus reaction to generate elemental sulfur.

[0031] The main reactions are as follows:

[0032] h 2 S / S X / COS / CS 2...

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Abstract

The invention discloses a method for preparing sulfur and processing tail gas by taking ammonium bisulfite as an intermediate and belongs to the technical field of sulfur recovery. The method is characterized by comprising the following steps: 1) separating NH3 from an acidic water stripping device by adopting the prior art to obtain gas ammonia or aqua ammonia; 2) oxidizing all non SO2 sulfides in the tail gas into SO2 through burning the tail gas in a Claus sulfur recovery device; 3) reacting the tail gas after burning and the NH3 separated from the acidic water stripping device in a liquidphase to produce NH4HSO3 and (NH4)2SO3, and discharging the purified tail gas; and 4) atomizing the NH4HSO3 and (NH4)2SO3 water solution, spraying the water solution into a reacting furnace of the Claus sulfur recovery device, decomposing the NH3 into N2 after thermal decomposition, and enabling SO2 to participate in Claus reaction to obtain an elemental sulfur. Compared with the tedious technical process of the prior art, the method has greatly shortened process, and construction investment, operating cost and energy consumption are reduced by more than 30%.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, and in particular relates to a sulfur production and tail gas treatment method using ammonium bisulfite as an intermediate. Background technique [0002] The raw material of the Claus sulfur recovery unit is mainly from the alcohol amine desulfurization unit containing H 2 S acid gas and acid water stripping unit containing H 2 S and NH 3 acid gas. Enter the Claus sulfur recovery unit to recover sulfur, and the tail gas of sulfur production is discharged after hydrogenation reduction-absorption-incineration. This process can reach a total sulfur yield of more than 99.8%. However, the process is long, the construction investment is large, and the operating cost and energy consumption are high. Contents of the invention [0003] The invention provides a new sulfur production and tail gas treatment method, which can obtain a higher total sulfur yield than the original process, simplify...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/04B01D53/48
Inventor 范西四
Owner SHANDONG SUNWAY PETROCHEMICAL ENGINEERING CO LTD
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