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Circulating fluidized bed semi-dry method desulfurization and dust removal twin-tower switching system and method and application

A semi-dry desulfurization and circulating fluidized bed technology, applied in the field of double-tower switching systems, can solve problems such as flue gas emission standards

Pending Publication Date: 2019-11-05
SHANDONG SHENHUA SHANDA ENERGY ENVIRONMENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problem of stable switching between single and double towers, and at the same time, the problem of flue gas discharge up to standard during the switching process through the net flue gas recirculation scheme after desulfurization

Method used

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  • Circulating fluidized bed semi-dry method desulfurization and dust removal twin-tower switching system and method and application
  • Circulating fluidized bed semi-dry method desulfurization and dust removal twin-tower switching system and method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0092] A circulating fluidized bed semi-dry desulfurization and dust removal double tower switching system, refer to figure 1 , including: the first desulfurization and dust removal tower, the second desulfurization and dust removal tower and switching system.

[0093]The first desulfurization and dust removal tower includes: a first desulfurization tower 1, a first dust remover 2, a first desulfurization silo 3, a first water tank 4 and a first induced draft fan 5; wherein, the first dust remover 2 and the second The upper part of a desulfurization tower 1 communicates; the first desulfurization bin 3 communicates with the bottom of the first desulfurization tower 1; the first water tank 4 is arranged above the first desulfurization bin 3 and communicates with the first desulfurization tower 1, The first induced draft fan 5 is arranged between the first dust collector 2 and the chimney 27 .

[0094] The second desulfurization and dust removal tower includes: a second desulfu...

Embodiment 2

[0100] A switching method of circulating fluidized bed semi-dry desulfurization and dedusting double towers during the load-up stage, refer to figure 2 , including the following steps:

[0101] (1) In the load-up stage, the flue gas volume gradually increases, and the single-tower operation state needs to be switched to the double-tower operation state. Assume that the first desulfurization and dust removal tower is in operation, and the second desulfurization and dust removal tower is not in operation. At this time, the main flue gas communication door 13 is opened, the first flue gas inlet door 14 is opened, and the rest of the doors are closed, the untreated first flue gas 28 and the second flue gas 29 enter the first flue gas duct 11 and the second flue gas duct 12 respectively Convergence in the first flue gas pipeline 11, then enter the first desulfurization and dust removal tower for desulfurization and dust removal;

[0102] (2) In the first stage, the net flue gas a...

Embodiment 3

[0131] A switching method of circulating fluidized bed semi-dry desulfurization and dedusting double towers during the load-up stage, refer to figure 2 , including the following steps:

[0132] (1) In the load-up stage, the flue gas volume gradually increases, and the single-tower operation state needs to be switched to the double-tower operation state. Assume that the first desulfurization and dust removal tower is in operation, and the second desulfurization and dust removal tower is not in operation. At this time, the main flue gas communication door 13 is opened, the first flue gas inlet door 14 is opened, and the rest of the doors are closed, the untreated first flue gas 28 and the second flue gas 29 enter the first flue gas duct 11 and the second flue gas duct 12 respectively Convergence in the first flue gas pipeline 11, then enter the first desulfurization and dust removal tower for desulfurization and dust removal;

[0133] (2) In the first stage, the net flue gas a...

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Abstract

The invention belongs to the field of circulating fluidized bed semi-dry method desulfurization and dust removal, and particularly relates to a circulating fluidized bed semi-dry method desulfurization and dust removal twin-tower switching system and a method and application. The circulating fluidized bed semi-dry method desulfurization and dust removal twin-tower switching system comprises a first flue gas pipeline, a second flue gas pipeline, a main flue gas communicating door, a first flue gas inlet door, a second flue gas inlet door, a first flue gas inlet, a second flue gas inlet, a firstflue gas circulating pipeline, a second flue gas circulating pipeline, a clean flue gas circulating communicating door, a third flue gas circulating pipeline, a fourth flue gas circulating pipeline,a first flue gas circulating door, a second flue gas circulating door, a third flue gas circulating door, a fourth flue gas circulating door and the like. According to the circulating fluidized bed semi-dry method desulfurization and dust removal twin-tower switching system, through chain action of the adjusting doors, stable switching between single / twin towers can be realized, meanwhile, flue gas standard discharge in the switching process is guaranteed, and the problems that the stable switching between the single / twin towers is realized and flue gas discharge reaches the standard in the switching process in the varying load process with an arrangement form of ''one furnace and twin towers'' are well solved.

Description

technical field [0001] The invention belongs to the field of circulating fluidized bed semi-dry desulfurization and dust removal, and in particular relates to a system and method for realizing the switching of two desulfurization towers when one boiler unit is equipped with two desulfurization towers when the load changes. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and it is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Circulating fluidized bed semi-dry desulfurization technology and limestone / lime-gypsum wet desulfurization technology are currently mainstream flue gas desulfurization solutions for coal-fired units and metallurgical industries (steel sintering machines, etc.). With the continuous improve...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/48F23J15/02
CPCB01D53/80B01D53/48F23J15/022B01D2258/0283B01D2251/404
Inventor 赵剑杨超玉杨春振潘峰马鸿良
Owner SHANDONG SHENHUA SHANDA ENERGY ENVIRONMENTAL
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