Double-tower bidirectional-spray multicycle desulfurization absorbing tower

A desulfurization absorption tower and multi-cycle technology, which is applied in the field of desulfurization absorption towers and wet flue gas desulfurization equipment, can solve the problems that cannot meet ultra-low emissions

Inactive Publication Date: 2016-01-06
DATANG ENVIRONMENT IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the existing desulfurization facilities can no longer meet the requirements of sulfur dioxide (SO 2 ) "ultra-low emission", that is, the emission concentration does not exceed 35mg / Nm 3 emission requirements

Method used

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  • Double-tower bidirectional-spray multicycle desulfurization absorbing tower
  • Double-tower bidirectional-spray multicycle desulfurization absorbing tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Taking an actual thermal power plant 2×300MW coal-fired generating set as an example, the application is as follows figure 1 The shown double-tower double-direction spraying and multi-circulation desulfurization absorption tower has a flue gas flow rate of 1098684m 3 / h, the inlet sulfur dioxide concentration is 3820mg / Nm 3,, the flue gas enters the tower body from the flue gas inlet, and after passing through the grid flow equalization module, the distribution of the flue gas flow field is more uniform, and then the flue gas contacts and reacts with the gypsum slurry sprayed from the spray layer. The liquid-gas ratio (volume) is 30L / m 3 , and, in the process of the flue gas passing through the spray layer, the distribution of the flow field has no dead angle, no bypass, and strong uniformity, which eliminates the unfavorable flow field caused by the uneven inlet on the inlet side of the absorption tower and the vortex of the industrial flow field influences.

[0041...

Embodiment 2

[0047] Taking another thermal power plant 2×350MW coal-fired generating set as an example, the application is as follows figure 1 The shown double-tower double-direction spraying and multi-circulation desulfurization absorption tower has a flue gas flow rate of 1390000m 3 / h, the inlet sulfur dioxide concentration is 3600mg / Nm 3 ,, the flue gas enters the tower body from the flue gas inlet, and after passing through the grid flow equalization module, the distribution of the flue gas and flue gas flow field is more uniform, and then the flue gas contacts and reacts with the gypsum slurry sprayed from the spray layer. At this time, the two The liquid-gas ratio is 30L / m 3 , and, in the process of the flue gas passing through the spray layer, the distribution of the flow field has no dead angle, no bypass, and strong uniformity, which eliminates the unfavorable flow field caused by the uneven inlet on the inlet side of the absorption tower and the vortex of the industrial flow fi...

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Abstract

The invention provides a double-tower bidirectional-spray multicycle desulfurization absorbing tower comprising a main tower body in which is provided with a multilayer spray device, an assistant tower body, a plurality of slurry circulation pipes communicating with the multilayer spray device, a main tower slurry pool and an assistant tower slurry pool. The multilayer spray device comprises a unidirectional spray layer and a plurality of bidirectional spray layers disposed below the unidirectional spray layer. A part of the slurry circulation pipes communicate with the main tower slurry pool, and the other part of the slurry circulation pipes communicate with the assistant tower slurry pool. Each slurry circulation pipe is provided with a supercharging device. The slurry coverage rate of the spray layers can reach the maximum value of 285%, the gypsum slurry and sulfur dioxide in the flue gas can be reacted in full contact, and the concentration of sulfur dioxide in discharged flue gas can be reduced to less than 25 mg/Nm<3> which can reach the standard requirement of "ultra-low emission".

Description

technical field [0001] The invention relates to the field of environmental protection technology, in particular to wet flue gas desulfurization equipment, in particular to a desulfurization absorption tower with two towers, two-way spraying and multiple cycles. Background technique [0002] With the continuous development of China's economy, the demand for electricity continues to increase, and the smog continues to affect it. Controlling PM2.5 is on the agenda. Local governments and power companies have put forward the construction or renovation requirements of "ultra-low emissions", "near-zero emissions", and "meet gas turbine emission standards". "Ultra-low emissions" requires the realization of ultra-clean emissions to scientifically guide the sustainable development of the thermal power industry. [0003] The Development and Reform Commission issued the "Coal Power Energy Conservation and Emission Reduction Upgrading and Transformation Action Plan (2014-2020)" to stric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 刘玉新刘畅
Owner DATANG ENVIRONMENT IND GRP
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