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Desulfurization and denitrification integrating system and bed-building method thereof

A desulfurization, denitrification and denitration technology, which is applied in the field of flue gas purification, can solve the problems of collapsed bed, low flue gas treatment efficiency and complex process.

Pending Publication Date: 2018-07-24
LONGKING COALOGIX ENVIRONMENTAL PROTECTION TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the requirements of the semi-dry flue gas desulfurization and denitrification process of the circulating fluidized bed, it is necessary to maintain a suitable bed pressure drop, and to maintain the stable operation of the bed during the construction and operation of the semi-dry flue gas desulfurization and denitrification of the circulating fluidized bed During the process, a little carelessness will cause fluctuations in the material bed, which in turn may lead to the possibility of bed collapse
However, the existing circulating fluidized system generally requires manual operation to build the absorption tower and maintain the bed stability. The process is complicated, the operation is cumbersome, and the flue gas treatment efficiency is low.

Method used

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  • Desulfurization and denitrification integrating system and bed-building method thereof

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specific Embodiment 1

[0045] Such as figure 1 As shown, this specific embodiment discloses a more preferred embodiment of the desulfurization and denitrification integrated system, which includes an absorption tower 1 and a dust collector 2, and the flue gas inlet at the bottom of the absorption tower 1 communicates with a main flue 3 , the main flue 3 transports the flue gas to be treated in the absorption tower 1, the flue gas outlet at the top of the absorption tower 1 communicates with the dust collector 2, the main flue 3 is provided with a denitrification oxidant addition port, and the denitrification oxidant addition port is connected to the A denitrification oxidizer adder 4 communicates, and the denitrification oxidizer adder 4 is used to inject denitrification oxidant into the main flue 3, and the bottom of the absorption tower 1 is also provided with an absorbent addition port, and the absorbent addition port is connected with one located in the absorption tower 1 The external absorbent ...

specific Embodiment 2

[0054] This specific embodiment one discloses a more preferred embodiment of the bed building method of the integrated desulfurization and denitrification system. The bed building method is the bed building method of the desulfurization and denitrification integrated system disclosed in the first embodiment. Include steps:

[0055] S10: Detect the bed pressure drop and the actual opening of the material circulation regulating valve, bed pressure drop = total pressure drop - empty bed pressure drop, total pressure drop = flue gas inlet pressure of the absorption tower - flue gas outlet pressure of the absorption tower , the empty bed pressure drop is the own resistance value of the absorption tower. When no material is fed to the absorption tower, the flue gas with various flow velocities passes through the absorption tower, so as to measure the corresponding relationship between the flue gas flow value and the empty bed pressure drop;

[0056] S20: judging the relationship bet...

specific Embodiment 3

[0070] This specific embodiment discloses a more preferred embodiment of a flue gas treatment method integrated with desulfurization and denitrification. The flue gas treatment method includes steps:

[0071] S10: Conveying the flue gas to the absorption tower through the main flue, and spraying the denitrification oxidant into the main flue;

[0072] S20: The oxidized flue gas enters the absorption tower from the bottom flue of the absorption tower, and is accelerated through the Venturi tube after contacting with the alkaline absorbent and circulating ash;

[0073] S30: The desulfurized and denitrified flue gas is discharged from the top of the absorption tower, and enters a dust collector, and the dust collector absorbs dust particles in the flue gas;

[0074] S40: Part of the dust particles filtered by the dust collector are circulated back to the absorption tower through the material circulation tank, and the circulating ash returned to the absorption tower is mixed with ...

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Abstract

The invention discloses a desulfurization and denitrification integrating system and a bed-building method thereof. The desulfurization and denitrification integrating system comprises an absorbing tower and a dust remover, wherein a flue-gas inlet positioned in the bottom part of the absorbing tower is communicated with a main flue, a flue-gas outlet positioned in the top part of the absorbing tower is communicated with the dust remover, the main flue is communicated with a denitrification oxidant adder, the absorbing tower is communicated with an absorbent adder, and is also internally provided with a Venturi pipeline, and the bottom part of the absorbing tower is communicated with the bottom part of the dust remover by a material circulating groove; a flue-gas inlet and a flue-gas outlet of the absorbing tower are respectively provided with a pressure detector, the material circulating groove is provided with a material-circulation adjusting valve, and the pressure detectors are electrically connected with the material-circulation adjusting valve by a controller. The desulfurization and denitrification integrating system disclosed by the invention has the beneficial effects thatnot only can desulfurization and denitrification of flue gas be realized, but also a bed layer in the absorbing tower can be automatically built, and the stability of the bed layer in the absorbing tower can be maintained by automatic adjustment.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a desulfurization and denitrification integrated system and a bed building method thereof. Background technique [0002] At present, the circulating fluidized bed dry process has been applied in the fields of flue gas treatment such as electric power and sintering machines. In the requirements of the semi-dry flue gas desulfurization and denitrification process of the circulating fluidized bed, it is necessary to maintain a suitable bed pressure drop. During the process, a little carelessness will cause fluctuations in the material bed, which in turn may lead to the possibility of bed collapse. However, the existing circulating fluidization system generally requires manual operation to build the absorption tower and maintain the bed stability. The process is complicated, the operation is cumbersome, and the flue gas treatment efficiency is low. [0003] Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60
CPCB01D53/30B01D53/60B01D53/78
Inventor 钟雄友刘丽平单文盼
Owner LONGKING COALOGIX ENVIRONMENTAL PROTECTION TECH SHANGHAI CO LTD