Device and a method for process for removing nitric oxide from tail gas of sulfur recovery device

A nitrogen oxide and sulfur recovery technology, applied in chemical instruments and methods, combustion methods, separation methods, etc., can solve problems such as catalyst poisoning and blockage, and achieve the effect of reducing costs and increasing operating life.
CN112495160AActive Publication Date: 2021-03-16江苏昆仑互联科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江苏昆仑互联科技有限公司
Publication Date
2021-03-16

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Abstract

The invention provides a device and a method for a process for removing nitric oxide from tail gas of a sulfur recovery device. The system comprises a sulfur recovery tail gas incineration device, a heat exchanger, a desulfurization device, a first-stage steam heater, a GGH heat exchanger, a second-stage steam heater, an ammonia spraying grid, a denitration reactor and a flue gas pipeline. Tail gas of the sulfur recovery device is incinerated to enable sulfur-containing compounds in the tail gas to be incinerated and converted into SO2, high-temperature flue gas obtained after incineration isintroduced into the heat exchanger, the temperature of the flue gas is reduced, and then the flue gas is introduced into a desulfurization device for desulfurization. Desulfurized flue gas passes through the first-stage steam heater, the GGH heat exchanger, the second-stage steam heater and other devices to enable the temperature to reach the efficient reaction temperature interval of the denitration reactor, then the flue gas enters the denitration reactor to complete nitrogen oxide removal, heat exchange between reacted high-temperature flue gas and cold flue gas is completed through the GGHheat exchanger, and the flue gas is discharged through a chimney after the temperature of the flue gas is reduced. A series of defects of catalyst poisoning, blockage and the like in a traditional arrangement mode of denitration before desulfurization are overcome.
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Description

technical field

[0001] The invention relates to the technical field of flue gas treatment of tail gas incinerators of sulfur recovery devices, in particular to a device and method for removing nitrogen oxides from tail gas of sulfur recovery devices. Background technique

[0002] With the rapid growth of my country's national economy, coal chemical industry and petroleum processing have developed rapidly. The processing volume of sour coal, crude oil and sour natural gas also increased accordingly. In particular, since the 1990s in my country, the oil refining industry has processed a large amount of imported sour crude oil. Economic growth and strict control of environmental protection make related gas desulfurization recovery technology increasingly important.

[0003] Since the industrialization of sulfur recovery Claus (Claus) process in the 1930s, after decades of development and improvement, the process has been very mature and perfect. However, because the Claus re...

Claims

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