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Control method for improving economical operation of boiler charge returning air blower

A control method and technology of economical operation, applied in pump control, mechanical equipment, machine/engine, etc., can solve the problems of high operation risk, affecting the return effect of the returner, and coking in the furnace, and achieve the effect of optimizing the control logic.

Inactive Publication Date: 2011-03-09
LEE & MAN PAPER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The return fan of the circulating fluidized bed boiler is generally designed as two-purpose and one-standby operation. Although the safety factor is high, the cost will increase accordingly, and the goal of energy saving and consumption reduction cannot be achieved.
In fact, as long as a single anti-feeding fan is running, the load requirements can be met. However, when the control and debugging personnel design the control logic of the anti-feeding fan, they are programmed according to the two-use and one-standby control scheme required by the boiler manufacturer, and they can run without modifying the control logic. Single fan, high risk of operation
If the feeding fan trips, the operator does not immediately find out that the feeding air pressure drops below 20KPa within one minute, which will directly affect the feeding effect of the feeding device, causing the bed temperature to rise rapidly and the furnace to coke.

Method used

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  • Control method for improving economical operation of boiler charge returning air blower
  • Control method for improving economical operation of boiler charge returning air blower

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Embodiment Construction

[0013] The present invention will be further described in conjunction with the following examples.

[0014] An embodiment of the control method for improving the economical operation of the boiler return fan of the present invention, the steps include:

[0015] A. Configure three return fans, namely No. 1 return fan 1, No. 2 return fan 2 and No. 3 return fan 3. When the boiler is in normal operation, No. 1 return fan 1 and No. 2 return fan 2 are operated. And No. 3 return fan 3 standby;

[0016] B. Preset the outlet air pressure setting value at the outlet of each return fan of the boiler;

[0017] C. A pressure sensor is set at the outlet of each return fan of the boiler, and the outlet air pressure average value of each return fan measured by the pressure sensor is calculated, and the outlet air pressure average value and the outlet air pressure setting value for comparison;

[0018] D. If the average value of the outlet air pressure is less than the set value of outl...

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PUM

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Abstract

The invention relates to the technical field of boilers, in particular to a control method for improving economical operation of a boiler charge returning air blower, comprising the following steps: A. deploying three charge returning air blowers (NO.1, NO.2 and NO.3), operating the NO.1 charge returning air blower when the boiler operates normally and leading the rest of the two charge returning air blowers for standby application; B. presetting an exit wind pressure set value at the exit of each charge returning air blower of the boiler; C. installing pressure sensors at the exit of each returning air blower of the boiler, calculating the exit wind pressure mean value of each returning air blower measured by a pressure sensor and comparing the mean value with the set value; and D. initiating the NO.2 charge returning air blower if the mean value is less than the set value. By utilizing the control method for improving economical operation of boiler charge returning air blower, control logic of the operation of the air blowers is optimized, the purposes of saving energy and reducing energy consumption are achieved, and the control objective of safe operation is realized, thus realizing the control logic of leading one charge returning air blower into operation and the rest of the two charge returning air blowers for standby application.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a control method for improving the economical operation of a boiler return fan. Background technique [0002] The return fan of the circulating fluidized bed boiler is generally designed as two-purpose and one-standby operation. Although the safety factor is high, the cost will also increase if it is operated according to the dual-purpose and one-standby operation, and the goal of energy saving and consumption reduction cannot be achieved. In fact, as long as a single anti-feeding fan is running, the load requirements can be met. However, when the control and debugging personnel design the control logic of the anti-feeding fan, they are programmed according to the two-use and one-standby control scheme required by the boiler manufacturer, and they can run without modifying the control logic. A single fan has a high risk of operation. If the feeding fan trips, the operator does n...

Claims

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Application Information

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IPC IPC(8): F04D27/00
Inventor 李文斌
Owner LEE & MAN PAPER MFG
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