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Seawater flue gas desulphurization (FGD) system applying boiler blowdown water

A boiler blowdown and desulfurization system technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve problems such as unfavorable flue gas evacuation, low flue gas temperature, equipment corrosion, etc., and achieve the ideal of water quality recovery and improvement. Desulfurization efficiency and corrosion mitigation effect

Inactive Publication Date: 2012-02-08
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0011] The purpose of the present invention is to solve the problem of low flue gas temperature after desulfurization in the existing flue gas seawater desulfurization system, which is easy to cause corrosion of subsequent equipment and is not conducive to the emptying of flue gas, and to provide a flue gas seawater desulfurization system using boiler sewage

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  • Seawater flue gas desulphurization (FGD) system applying boiler blowdown water
  • Seawater flue gas desulphurization (FGD) system applying boiler blowdown water

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Embodiment Construction

[0026] refer to figure 1 As shown, the equipment connection method in the flue gas seawater desulfurization system using boiler blowdown water is as follows:

[0027] The FGD inlet baffle 3 is connected to the bottom of the precooler 5, the top of the precooler 5 is connected to the bottom of the absorption tower 6, and the top of the absorption tower 6 is connected to the shell-side inlet port of the heat exchanger 10 for heat exchange. The shell-side outlet end of the device 10 communicates with the inlet end of the FGD outlet baffle 4 , and the outlet end of the FGD outlet baffle 4 is connected with the wet chimney 1 .

[0028] The tube-side inlet port of the heat exchanger 10 communicates with the sedimentation tank 11 equipped with boiler blowdown water, and the tube-side outlet port of the heat exchanger 10 communicates with the main pipe at the spray inlet end of the absorption tower 6, which collects Boiler blowdown water from the outlet end of the tube side of the he...

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Abstract

The invention discloses a seawater flue gas desulphurization (FGD) system applying boiler blowdown water. The seawater FGD system is characterized in that flue gas can be cooled by a precooler before desulphurization; by adopting a shell-and-tube exchanger, the boiler blowdown water and the desulphurized flue gas can perform heat exchange, which increases the temperature of the desulphurized fluegas, reduces corrosion of subsequent equipment and meanwhile lowers the temperature of the blowdown water; the cooled boiler blowdown water is mixed with seawater so as to enhance the alkalinity of absorption liquid and improve the desulphurization efficiency; and by arranging a pre-aeration tank and adopting a deep aeration mode, the quality of the desulphurized seawater and the boiler blowdown water is improved, and the occupation area of the aeration tank is reduced so as to lower the investment cost. The seawater FGD system integrates FGD, water quality recovery and application of the boiler blowdown water so as to achieve important application value in improvement of environmental protection economical efficiency of coastal power plants.

Description

technical field [0001] The invention belongs to the environmental protection technology, and relates to a flue gas seawater desulfurization system, in particular to a flue gas seawater desulfurization system using boiler sewage. Background technique [0002] Flue gas seawater desulfurization mainly uses the natural alkalinity of seawater to absorb SO 2 , since the process cooling water can be used directly when applied in coastal thermal power plants, it has also become a typical process for comprehensive utilization of natural resources. The seawater desulfurization process has the following advantages: [0003] (1) The absorbed sulfur dioxide is transformed into a natural component in seawater—sulfate, and the seawater after absorbing sulfur dioxide is treated to meet environmental requirements and discharged into the sea without generating solid waste; [0004] (2) The system does not produce fouling and blockage, and the system utilization rate is high; [0005] (3) Us...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50
Inventor 王树众李晖艳王龙飞张建东
Owner XI AN JIAOTONG UNIV
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