Device for preventing wet desulfurization outlet flue from low-temperature corrosion and control method thereof

An outlet flue and wet desulfurization technology, applied in the direction of temperature control, separation methods, chemical instruments and methods using electric methods, can solve the problems of low-temperature corrosion of pipelines, increase operating costs, hidden safety hazards, etc., to avoid low-temperature corrosion Effect

Active Publication Date: 2013-04-03
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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  • Abstract
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  • Application Information

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Problems solved by technology

In actual operation, low-temperature corrosion is often caused to pipelines, affecting normal production, increasing operating costs, and posing certain safety hazards

Method used

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  • Device for preventing wet desulfurization outlet flue from low-temperature corrosion and control method thereof
  • Device for preventing wet desulfurization outlet flue from low-temperature corrosion and control method thereof
  • Device for preventing wet desulfurization outlet flue from low-temperature corrosion and control method thereof

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing.

[0016] As shown in the figure, the device for preventing low-temperature corrosion of the wet desulfurization outlet flue of the present invention includes a wet desulfurization outlet flue 6, and a flue gas analyzer 1 and a temperature measuring instrument 2 are installed on the wet desulfurization outlet flue 6. The desulfurization outlet flue 6 is connected to the high-temperature flue 5 through a high-temperature air pipe 7. A heat exchanger 4 is arranged on the high-temperature flue 5. The high-temperature air pipe 7 is connected to one end of the heat exchanger 4, and the other end of the heat exchanger 4 is connected to the The air pipeline 8 is connected, the high-temperature air pipeline 7 is provided with an electric valve 3 , and the high-temperature air pipeline 7 between the electric valve 3 and the heat exchanger 4 is provided with a temperature measuring instr...

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Abstract

The invention relates to a wet desulfurization outlet flue, and especially relates to a device for preventing the wet desulfurization outlet flue from low-temperature corrosion and a control method thereof. The device comprises a wet desulfurization outlet flue. The wet desulfurization outlet flue is provided with a flue gas analyzer and a temperature measurement instrument. The wet desulfurization outlet flue is connected with a high temperature flue by a high temperature air pipe. The high temperature flue is provided with a heat exchanger. The high temperature air pipe is connected to one end of the heat exchanger and the other end of the heat exchanger is connected to an air pipe. The device has the advantages that a temperature of flue gas in a flue is always higher than a dew point temperature of an acid; and low-temperature corrosion of a flue is avoided.

Description

technical field [0001] The invention relates to a device for low-temperature corrosion of a flue, in particular to a device and a control method for preventing low-temperature corrosion of a wet desulfurization outlet flue. Background technique [0002] Wet flue gas desulfurization is to use the sprayed slurry to wash the flue gas, and remove the corrosive elements in the flue gas in the absorption tower. The efficiency of wet flue gas desulfurization is usually above 90%, but the outlet flue gas still contains a small part of SO 3 and SO 2 , and the H in the flue gas 2 The high content of O increases the acid dew point temperature of the flue gas. In actual operation, low-temperature corrosion is often caused to pipelines, affecting normal production, increasing operating costs, and posing certain safety hazards. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a device and control method for preventing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50G05D23/19F16L55/00
Inventor 马安君瞿文军李玉峰
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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