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Regenerable wet flue gas desulfurization process

A wet flue gas desulfurization and flue gas technology, which is applied in the field of flue gas purification, can solve problems such as large water vapor consumption, and achieve the effects of being beneficial to environmental protection, saving consumption and flexible utilization

Active Publication Date: 2013-01-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a regenerable wet flue gas desulfurization process to solve the problem of excessive water vapor consumption when the rich liquid is regenerated in the regeneration tower in the existing regenerable wet flue gas desulfurization process

Method used

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Examples

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Embodiment

[0035] according to figure 2 The main process flow shown was tested in the laboratory, see the figure 2 as well as figure 1 related instructions. Example with figure 2 The differences in the process flow shown are: ① using Figure 4 The fourth regeneration tower reboil process shown (see the Figure 4 Relevant instructions), the exothermic flue gas flowing out of the flue gas heat exchanger 22 enters the lower part of the cooling section 52 through the flue gas pipeline 101; After the pipeline 101, it is not subjected to dust removal; ③ No filter 7 is installed, and the rich liquid flowing to the lean-rich liquid heat exchanger 8 does not pass through the filter 7 to remove the contained solid impurities, and directly enters the lean-rich liquid heat exchanger 8; ④ No setting In the thermally stable salt remover 11 , all the lean liquid flowing out from the lean liquid pump 21 enters the lean-rich liquid heat exchanger 8 .

[0036] The main equipment or parts used in ...

Embodiment 4

[0039] Examples 4 to 5 use steam as the reboil heat source medium of hot water or steam reboiler 14, and the specific consumption of water steam is shown in Table 3. As can be seen from Table 3, after adopting the decompression regeneration scheme of the present invention, every 1 kilogram of sulfur dioxide is regenerated, and the consumption of steam is 12.36 kilograms (embodiment 4) and 12.98 kilograms (embodiment 5); per ton of sulfur dioxide, the water vapor consumption is 12.36 tons (Example 4) and 12.98 tons (Example 5), both of which are lower than the water vapor consumption of the existing renewable wet flue gas desulfurization process.

[0040] Table 1

[0041]

[0042] Table 2

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[0044] table 3

[0045]

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Abstract

The invention discloses a regenerable wet flue gas desulfurization process so as to solve the problem of excessive water vapor consumption during regeneration of a rich solution in a regeneration tower in existing regenerable wet flue gas desulfurization processes. The process provided in the invention comprises the steps of: A. flue gas cooling and absorption, with an organic absorbent used during absorption; and B. rich solution regeneration, which is performed in a regeneration tower (12). The tower top pressure of the regeneration tower (12) is lower than an atmospheric pressure, and the regeneration is carried out under a pressure reduced condition. A reboiling system of the regeneration tower (12) is provided with a hot water or water vapor reboiler (14), and the reboiling heat source medium is hot water or water vapor. The process disclosed in the invention can be used in petroleum refining, power generation, smelting and other enterprises to perform desulfurization treatment on flue gas.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and relates to a renewable wet flue gas desulfurization process. Background technique [0002] Acid deposition caused by sulfur dioxide and other acid gases has become an environmental problem of worldwide concern. Among them, the tail gas emitted by smelters, sulfuric acid plants, paper mills and other enterprises and the flue gas emitted by coal and oil combustion are important sources of sulfur dioxide in the atmosphere. With the increasing improvement of environmental protection laws and regulations in various countries, flue gas desulfurization technology has also been greatly developed. Compared with the traditional "limestone-gypsum method" and other discarding methods, the renewable wet flue gas desulfurization process does not produce secondary pollution, and can recycle sulfur dioxide as a resource. It is a greener flue gas desulfurization technology . [0003] When the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D50/00
Inventor 胡敏郭宏昶朱雷鸣汤红年王刻文
Owner CHINA PETROLEUM & CHEM CORP
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