Method for desulfurizing waste gas and reutilizing sulfur source

A waste gas desulfurization and waste gas technology, which is applied in the field of desulfurization of sulfur dioxide-containing waste gas and recycling of sulfur resources, can solve the problems of secondary pollution and high desulfurization cost, and achieve the effects of fast desulfurization speed, high desulfurization rate and low energy consumption

Inactive Publication Date: 2006-02-22
SICHUAN UNIV
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Problems solved by technology

[0004] To sum up, the current waste gas desulfurization absorption tail liquid treatment and resource utilization ultimately comes down to the treatment of sulfur-containing wastewater. The common problems of the available methods of sulfur-containing compounds are: first, the high cost of desulfurization, such as the consumption of ammonia water in the desulfurization of the ammonia li...

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  • Method for desulfurizing waste gas and reutilizing sulfur source

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Embodiment

[0032] Using sodium carbonate (Na 2 CO 3 ) lye is the absorption liquid, adopts the inventive method to remove sulfur dioxide (SO 2 ), to recover sulfur resources from waste gas, to achieve the purpose of treating waste with waste and recycling sulfur resources. Taking the treatment of a coal-fired boiler with a scale of 35T / h as an example, the amount of exhaust gas to be treated is 60000Nm 3 / h, the exhaust gas temperature is 180°C, and the sulfur dioxide content in the exhaust gas is 1500ppm.

[0033] The process flow of this embodiment is shown in the figure. 5% sodium carbonate (Na 2 CO 3 ) lye is pumped into the waste gas absorption device from the lye pool 1 through the water inlet 4 on the upper part of the waste gas absorption device 3 through the water inlet 4 on the upper part of the waste gas absorption device 3, and at the same time, the flue gas from the coal-fired boiler is dedusted by the dust collector 23 and then enters through the waste gas inlet at...

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Abstract

The invention provides a method for desulfurization from a SO2- laden waste gas and for recovery of the sulfur resource. A basic absorption liquid neutralizes the SO2- laden waste gas, discharge the purified gas when the content of SO2 reaches the standard; microbe reduces the desulfurizing absorption tail liquid (containing bisulphate group), and then the liquid is oxygenized with chemical treatment to recover elemental sulfur. The desulfurizing absorption tail liquid treated by microbe is basic, and it can return directly to the desulfurizing absorption unit and be reused as a basic absorption liquid; the chemical oxidant is oxygenized by microbe to revive. The invention realizes the aim of eliminating waste and recycling sulfur resource. And it is easy to operate and leads to none secondary pollution.

Description

1. Technical field [0001] The invention relates to a technology for desulfurizing waste gas containing sulfur and recycling sulfur resources, more specifically to a method for desulfurizing waste gas containing sulfur dioxide and recycling sulfur resources. 2. Background technology [0002] Sulfur dioxide emitted by fossil fuel combustion is one of the main causes of acid rain. Acid rain leads to acidification of soil and water systems, endangering forests and crops, and causing disastrous consequences to the human ecological environment. In 2000, my country's sulfur dioxide emissions were as high as nearly 20 million tons. Since 2003, the situation in areas heavily polluted by acid rain has been particularly severe. Therefore, it is urgent to take effective measures to reduce emissions or control sulfur dioxide. At present, the control of sulfur dioxide pollution can be divided into three ways, that is, desulfurization before combustion, desulfurization during combustion a...

Claims

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Application Information

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IPC IPC(8): B01D53/50
Inventor 苏仕军丁桑岚
Owner SICHUAN UNIV
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