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A method for treating sulfur recovery tail gas by using boiler flue gas ammonia desulfurization

A technology for recovering sulfur from tail gas and boiler flue gas is applied in separation methods, chemical instruments and methods, ammonium sulfate, etc., which can solve the problems of increased operating costs, complex process flow, large floor space, etc., and reduce land occupation. area, guaranteed sulfur recovery rate, and the effect of good sulfur recovery rate

Active Publication Date: 2017-01-25
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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  • Description
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AI Technical Summary

Problems solved by technology

However, the process is complex and the equipment investment is high, resulting in complex operation and increased operating costs, and it occupies a large area

Method used

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  • A method for treating sulfur recovery tail gas by using boiler flue gas ammonia desulfurization
  • A method for treating sulfur recovery tail gas by using boiler flue gas ammonia desulfurization

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Embodiment 1

[0069] The waste ammonia water 13 with a concentration of 15% by weight outside the boundary area is metered into the ammonia water tank for temporary storage. The waste ammonia water 14 is extracted from the ammonia water tank by the ammonia water pump, and the waste ammonia water 15 is sent to the circulation tank through the regulating valve group.

[0070] The process water 10 outside the boundary area is measured and stored in the process water tank. The process water 11 in the process water tank can be sent to various water points through the process water pump, including the water replenishment at the top of the absorption tower, the demister, the tower, and the pump inlets. , Cyclone, centrifuge, water seal of each pump, etc.

[0071] The oxidation fan pressurizes the air 7 to 90~130KPa, where the pressure is mainly determined by overcoming the resistance drop of the solution, so that the oxidized air 8 obtained after pressurization enters the bottom of the circulation ...

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Abstract

The invention provides a method for desulfurization of a sulfur recovery tail gas by using a boiler flue gas ammonia method. The method comprises the following steps: (1) burning the sulfur recovery tail gas, wherein sulfide in the sulfur recovery tail gas is converted into sulfur dioxide; (2) converging the burnt sulfur recovery tail gas with the boiler flue gas to form merged flue gas, feeding the merged flue gas to an absorption tower, and discharging the merged flue gas after being absorbed by absorption liquid in a countercurrent manner in the absorption tower, wherein the absorption liquid is a water solution containing an ammonium salt, and the ammonium salt is a mixture of ammonium sulfate and ammonium sulfite. By adopting the method disclosed by the invention, not only can the sulfur recovery rate be better ensured, but also emission of the tail gas achieves the environmental protection requirements; meanwhile, investment and operative difficulty are reduced; the floor area is reduced; the comprehensive utilization efficiency of energy is improved; a good effect of treatment of waste by waste can also be achieved.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, and relates to a method for treating sulfur recovery tail gas by using boiler flue gas ammonia desulfurization. Background technique [0002] With the rapid growth of my country's national economy, coal chemical industry and petroleum processing have developed rapidly. At the same time, the processing volume of sour coal, crude oil and sour natural gas also increased accordingly. Economic growth and strict control of environmental protection make related gas desulfurization and sulfur recovery technologies increasingly important. Sulfur is also extremely harmful in the process of coal chemical industry and oil processing. If it is not removed in time, it will seriously corrode the equipment and affect the long-term operation of the device. At the same time, the presence of sulfur also seriously affects product quality. [0003] Since the industrialization of sulfur recovery Claus (Clau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/79B01D53/48C01C1/24
CPCY02P20/10
Inventor 杨瑞华肖春辉姜成旭李安学刘永健闫立娜史书彬王季秋
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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