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Built-in flue smoke amount distributing control system of economizer

A technology for controlling system and flue gas volume, which is applied to the field of flue gas volume diversion control system built into economizers, can solve problems such as unsatisfactory effects, and achieve the effects of simple structure, obvious effect and flexible adjustment.

Active Publication Date: 2015-05-13
SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0031] For the fifth type, use the water-cooled fireplace water circulation pump to draw part of the water to increase the inlet water temperature of the economizer. It has been retrofitted and applied on a 300MW subcritical boiler in a power plant, and the effect is not satisfactory.

Method used

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  • Built-in flue smoke amount distributing control system of economizer
  • Built-in flue smoke amount distributing control system of economizer
  • Built-in flue smoke amount distributing control system of economizer

Examples

Experimental program
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Effect test

Embodiment

[0056] Such as Figure 4 As shown, an economizer built-in flue gas flow diversion control system includes an inlet header 3, an outlet header 4, and a plurality of serpentine pipe coils 5 arranged between the inlet header and the outlet header. The above control system also includes at least one partition 1 and a flue gas temperature regulating baffle 2, one end of the partition 1 passes through the outlet header 4 and then enters the flue between the inlet header 3 and the outlet header 4, The flue is divided, and the flue gas temperature-regulating baffle 2 is arranged on the partition 1 to block part of the flue after division.

[0057] There are two partitions 1, which divide the flue into three parts, e. The purpose of dividing into three parts is to prevent the deviation of the smoke temperature on the left and right sides. There are two flue gas temperature-regulating baffles 2, which are respectively installed on the divided flues on both sides. The flue gas temperat...

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Abstract

The invention relates to a built-in flue smoke amount distributing control system of an economizer. The built-in flue smoke amount distributing control system comprises an inlet header, an outlet header and a plurality of S-shaped pipe coils arranged between the inlet header and the outlet header. The built-in flue smoke amount distributing control system is characterized by further comprising at least one partition plate and a smoke temperature adjusting baffle, one end of the partition plate penetrates through the outlet header and then enters a flue between the inlet header and the outlet header to divide the flue, and the smoke temperature adjusting baffle is arranged on the partition plate to block part of the divided flue. Compared with the prior art, the built-in flue smoke amount distributing control system has the advantages of being simple in structure, obvious in effect, flexible in adjustment, capable of achieving stepless adjustment and control and the like.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection of a coal-fired power plant, in particular to a flue gas volume diversion control system built into an economizer. Background technique [0002] The essence of boiler full-load denitrification is to ensure that the SCR inlet temperature is ≥320°C to ensure the denitrification efficiency of the catalyst. Existing boilers typically do not reach this value at 60% load. At present, there are five kinds of boiler full-load denitrification transformation methods in China: [0003] (1) The water supply part of the economizer is bypassed; [0004] (2) The flue gas of the external economizer is partially bypassed; [0005] (3) Graded economizer; [0006] (4) Add No. 0 high-pressure heater to increase the feed water temperature; [0007] (5) Use the water-cooled fireplace water circulation pump to draw part of the water to increase the inlet water temperature of the e...

Claims

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Application Information

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IPC IPC(8): F28F27/02
Inventor 陈增宏柯建新刘德刚王健贾勇杜昌飞陈方前
Owner SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG
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