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Safe and energy-saving dynamic pneumatic ash removal system

An energy-saving and pneumatic technology, which is applied in the field of safe and energy-saving dynamic pneumatic ash removal system, can solve problems such as high material level alarm accidents in the ash storage hopper of electrostatic precipitators, threats to the safety and economic operation of coal-fired power plants, etc.

Inactive Publication Date: 2011-12-21
孙家鼎
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Problems solved by technology

Combined with the reality of our country, the quality of coal used in coal-fired power plants is variable and the quality of coal is declining. The positive pressure dense phase pneumatic ash conveying system in active service is difficult to adapt to. Conveying blockage and high material level alarm accidents in the ash storage hopper of the electrostatic precipitator often occur. Serious serious threats to the safety and economic operation of coal-fired power plants

Method used

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  • Safe and energy-saving dynamic pneumatic ash removal system
  • Safe and energy-saving dynamic pneumatic ash removal system

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Embodiment Construction

[0008] Firstly, among the ash storage hoppers under the electric field of the electrostatic precipitator I, select the one with the largest ash discharge capacity, and calculate its maximum ash discharge capacity Q (kg / s), and set the conveying capacity of fly ash as (Q+ΔQ ) (kg / s), during the operation of the ash removal system, the ash discharge capacity of the ash storage hopper changes in direct proportion to the boiler load and the ash content of the coal fired. The maximum real-time ash discharge capacity of the ash storage hopper Qs(kg / s)=Q×boiler load rate (%), and the ash delivery volume is set according to (Qs×1.1). This setting makes the real-time ash discharge volume of the ash storage hopper always smaller than the delivery volume of the ash removal system, and the ash storage bucket will not generate a high material level alarm. Determine the ash storage volume (Q+0.1Q) of the ash storage hopper according to such settings. The ash storage volume setting determin...

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Abstract

The invention relates to a safe and energy-saving dynamic pneumatic ash removal system for a coal-fired power plant. Phase pneumatic ash conveying system, while the safe and energy-saving dynamic pneumatic ash removing system cancels the warehouse pump and the inlet and outlet valves, and replaces them with numerical control gates, so as to overcome the possibility that the active positive pressure dense phase pneumatic ash conveying system may fail due to insufficient conveying output. A high material level alarm accident occurred in the ash storage hopper, which threatened the safe operation of the electrostatic precipitator. The safe and energy-saving dynamic pneumatic ash removal system can not only ensure that there will be no high material level alarm in the ash storage hopper, but also simplify the delivery system of the ash removal system, cancel the warehouse pump and its inlet and outlet valves and other related accessories and equipment, It can also monitor the flow state of the ash and the ash / air ratio in real time, improve the stability of the ash removal system, and make the system run continuously in a safe and energy-saving state.

Description

technical field [0001] The invention relates to a safe and energy-saving dynamic pneumatic ash removal system of a coal-fired power plant. technical background [0002] The fly ash produced by coal-fired power plants can be comprehensively utilized, and the fly ash needs to be transported to the ash storage for backup. Due to the large amount of ash conveyed and the long conveying distance, high conveying energy is required to complete the conveying. Coal-fired power plants currently generally adopt positive pressure dense-phase pneumatic ash removal systems with silo pumps as the main conveying equipment. Combined with the reality of our country, the quality of coal used in coal-fired power plants is variable and the quality of coal is declining. The positive pressure dense phase pneumatic ash conveying system in active service is difficult to adapt to. Conveying blockage and high material level alarm accidents in the ash storage hopper of the electrostatic precipitator of...

Claims

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Application Information

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IPC IPC(8): B65G53/16B65G53/36
Inventor 孙家鼎
Owner 孙家鼎
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