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Merged flue adjusting baffle cross arrangement structure and method

A technology of adjusting baffles and cross arrangement, which is applied in the direction of combustion method, exhaust gas device, combustion product treatment, etc., can solve the problem of uneven temperature field of flue gas, and achieve the effect of uniform temperature field and safe operation

Pending Publication Date: 2020-07-17
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention proposes a structure and method for merging flue regulating baffles to solve the uneven temperature field of the flue gas after the upstream flue is merged and mixed, and to meet the high efficiency and high efficiency of the downstream equipment. safe operation

Method used

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  • Merged flue adjusting baffle cross arrangement structure and method
  • Merged flue adjusting baffle cross arrangement structure and method
  • Merged flue adjusting baffle cross arrangement structure and method

Examples

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Effect test

Embodiment 1

[0040]In a power plant, a boiler with double flue baffles at the rear is used for temperature regulation. In actual operation, when the load is 40% to 60%, the flue gas temperature at the outlet of the front partition flue is 340°C, and the flue temperature at the outlet of the rear partition flue is 290°C.

[0041] However, due to the uneven mixing of the two flue gas streams in the front and rear flues, the temperature of the flue gas in some downstream areas is lower than 300°C, resulting in catalyst poisoning (catalyst failure) of the denitrification device, which seriously affects the environmental protection index control requirements of the power plant.

[0042] By adopting the cross-arrangement structure and method of the adjusting baffles of the present invention, the uneven mixing of the separated flue can be effectively solved, and the downstream equipment can be safely operated.

Embodiment 2

[0044] In a power plant, a boiler with double flue baffles at the rear is used for temperature regulation. In the new design, due to site and space constraints, the distance between the combined position of the separated flue at the end and the flue of the downstream equipment is short. According to the conventional structure of the combined flue, it cannot Meet mixing requirements.

[0045] By adopting the structure and method of intersecting arrangement of the regulating baffles of the present invention, the length of the merged flue is compressed through the intersecting and mixing of compartments, and the requirements of the site, space and downstream equipment are met.

[0046] In summary, the present invention arranges an integrated baffle structure capable of adjusting the flow rate at the merging position of each partitioned flue, crosses the flue gas from different partitioned flues into each small compartment along the width direction, and then divides and crosses the...

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Abstract

The invention discloses a merged flue adjusting baffle cross arrangement structure and method. The structure comprises separated flue compartments and integrated adjusting baffles, wherein the corresponding flue compartment is arranged at an outlet of each separated flue, the corresponding separated flue compartment of each separated flue is provided with a plurality of sub-compartments in the width direction of each separated flue, the integrated adjusting baffles are arranged at outlets of the separated flue compartments and located in a merged flue, the integrated adjusting baffles comprisea plurality of compartment doors, and the adjacent compartment doors are connected with the sub-compartments of the different upstream separated flue compartments correspondingly. According to the method, the corresponding separated flue compartment is arranged at the outlet of each separated flue and divided into the plurality of sub-compartments, the corresponding integrated adjusting baffle isarranged at the outlet of each separated flue compartment in the merged flue and divided into the plurality of compartment doors, and the adjacent compartment doors are controlled to be connected with the sub-compartments of the different upstream separated flue compartments correspondingly. According to the structure and the method, the problem of non-uniform flue gas temperature field after theupstream flues are merged and mixed is solved, and the efficient and safe operation of downstream equipment is met.

Description

technical field [0001] The invention relates to the technical field of boiler equipment, and more specifically, relates to a structure and a method for intersecting arrangement of combined flue regulating baffles. Background technique [0002] Tail partitioned flue boilers that use flue gas baffles to adjust steam temperature are widely used. The lower flue temperature area at the tail is designed to be divided into two or three parallel partitioned flues, and convection heating surfaces are arranged in the partitioned flues. The outlet of the flue is equipped with a flue gas regulating baffle separately, and the flue gas of each path merges into the combined flue after passing through the heating surface and the baffle, and the proportion of the flue gas in the separated flue is controlled by the opening of the baffle. [0003] This design scheme is mature and reliable, but there are differences in the flue gas temperature at the exit of each partitioned flue, and it takes ...

Claims

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Application Information

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IPC IPC(8): F23J11/00F23J13/00F23J13/08
CPCF23J11/00F23J13/00F23J13/08
Inventor 冉燊铭杨学权陈锋利李小荣
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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