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Nitrogen heat cycle method of active coke dry-process desulfurizer

A desulfurization device and activated coke technology, applied in separation methods, chemical instruments and methods, combustible gas purification, etc., can solve problems such as heat loss, equipment corrosion, accidents, etc.

Active Publication Date: 2011-08-24
WENGFU (GRP) CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0011] The purpose of the present invention is to solve the following shortcomings in the traditional thermal cycle process, such as heat loss, equipment corrosion during operation, and subsequent accidents and other process defects

Method used

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  • Nitrogen heat cycle method of active coke dry-process desulfurizer

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Embodiment

[0017] Example: Take the dry-process activated coke flue gas desulfurization device of Wengfu (Group) Co., Ltd. as an example. This device is the first dry-process activated coke flue gas desulfurization device in China. smoke. The specific implementation is as follows:

[0018] Combination of desorption tower active coke and heat exchange process in the process figure 1 Explanation: In specific operations,

[0019] Has adsorbed SO 2 The saturated activated coke flows from the adsorption tower 1 into the desorption tower, and flows through the preheating section 2, heating and desorption section 3, and cooling section 4 respectively. After the desorption is qualified, it is sent back to the adsorption tower for cyclic adsorption by bucket elevators.

[0020] The heating analysis section relies on 6 inlets of medium-pressure superheated steam and 7 outlets of medium-pressure superheated steam introduced from the outside to heat up to the analysis temperature so that the acti...

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Abstract

The invention discloses a nitrogen heat cycle method of an active coke dry-process desulfurizer, which selects nitrogen as heat cycle medium; the working process is as follows: active coke after being saturated by absorbing SO2 flowing into an analyzing tower from an absorbing tower, respectively flowing through a preheating section, a heating and analyzing section and a cooling section, and a bucket-type lifting machine conveying the active coke back to the absorbing tower for cycling absorption after the analysis is qualified; blowing the nitrogen into the cooling section by a pressurizing fan so as to cool the active coke, simultaneously heating the nitrogen and introducing into the preheating section to preheat the active coke; recovering heat energy by passing the nitrogen still with higher temperature through a desalted water gas cooler and realizing closed cycle after being cooled. The nitrogen heat cycle method of an active coke dry-process desulfurizer has the effects and advantages of realizing waste heat recovery and closed cycle, effectively recovering heat energy, greatly reducing consumption of cooling working medium, solving the problems of corrosion and firing of the analyzing tower and ensuring long-period, safe and stable operation of the system.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, in particular to the field of a nitrogen heat cycle method for an active coke dry desulfurization device. Background technique [0002] Activated coke dry flue gas desulfurization is the use of activated coke and SO in the flue gas of coal-fired boilers 2 Under the action, chemical reaction occurs with water and oxygen in the flue gas to generate sulfuric acid. The activated coke saturated with adsorption is desorbed by heating and reused after recovery of activity. [0003] The activated coke that adsorbs sulfur dioxide is heated to a certain temperature to decompose and desorb the sulfurous acid or sulfite accumulated in the activated coke, and the main decomposition products produced are: SO 2 , CO 2 、H 2 O, its physical form is a gas rich in sulfur dioxide. Under suitable process conditions, its SO 2 The volume concentration can reach more than 20%. [0004] Activated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04B01J20/34
Inventor 刘静柳玉松杨毅邱祖军岑祖望
Owner WENGFU (GRP) CO LTD
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