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Fresh air supply automatic control method of hazardous waste incineration rotary kiln

A rotary kiln and fresh air technology, applied in the direction of combustion method, incinerator, combustion type, etc., can solve the problems of adjusting fresh air supply, insufficient combustion of materials, large index fluctuations, etc., to achieve stable control, strong adaptability, and compliance rate high effect

Inactive Publication Date: 2020-05-01
江苏弘成环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, in the process of hazardous waste disposal using rotary kiln incineration, due to the complexity of the source of hazardous waste, the composition and physical form are not fixed, in the process of rotary kiln incineration, although the supply of fresh air uses a frequency conversion motor, but In the DCS control system, there is no control algorithm to support the closed-loop PID control. The fresh air supply volume is basically controlled by manually adjusting the fan speed. There is no effective algorithm to support the automatic control of the air volume.
[0005] Manual control cannot adjust the fresh air supply according to changes in the amount of feed and hazardous waste, that is, it cannot adjust the combustion state of the material in time, which can easily cause incomplete combustion of the material, resulting in a high slag burn rate and low pollution factors in the exhaust gas. Up to the standard, especially the fluctuation of CO (carbon monoxide) index, resulting in the incomplete combustion of hazardous waste, resulting in the failure of exhaust emission to meet the standard and causing environmental pollution

Method used

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Embodiment Construction

[0034] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0035] An automatic control method for fresh air supply of a rotary kiln for hazardous waste incineration, comprising the following steps:

[0036] S1. Calculate the volume V of the rotary kiln and the second combustion chamber;

[0037] S2. Calculate the fresh air margin Q1 that does not participate in combustion in the rotary kiln and the secondary combustion chamber;

[0038] Q1=V*M; M: Oxygen content control index;

[0039] S3. According to the hazardous waste compatibility list of the day, calculate the oxygen consumption of the main combustion elements / 21% of the oxygen content in the air, so as to obtain the fresh air volume Q2 required for the unit hazardous waste combustion;

[0040] Q2=(QA+QB+QC...) / 21%...

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PUM

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Abstract

The invention discloses a fresh air supply automatic control method of a hazardous waste incineration rotary kiln. The design of a rotary kiln fresh air supply amount algorithm during disposing of hazardous wastes in a rotary kiln incineration mode is made, the method is used for the industrial hazardous waste disposing industry, the fresh air supply amount is automatically calculated through algorithm optimization, thus the rotating speed of a fan is controlled, then the hazardous wastes are fully combusted, and the purposes of reducing clinker ignition loss and making waste gas emission reach the standard effectively are achieved.

Description

technical field [0001] The invention relates to an automatic control method for fresh air supply of a rotary kiln incinerating hazardous waste. Background technique [0002] Hazardous solid waste is referred to as hazardous waste, formerly known as hazardous waste. May, by reason of their amount, concentration, physical or chemical properties, or ease of transmission, cause or contribute to increased mortality; or increase the incidence of serious disease; or, when not administered or potentially hazardous solid waste. [0003] At present, the disposal methods of industrial solid hazardous waste at home and abroad mainly include safe landfill, wet leaching, and rotary kiln incineration. [0004] In the existing technology, in the process of hazardous waste disposal using rotary kiln incineration, due to the complexity of the source of hazardous waste, the composition and physical form are not fixed, in the process of rotary kiln incineration, although the supply of fresh a...

Claims

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Application Information

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IPC IPC(8): F23G5/20F23G5/16F23G5/44F23G5/50
CPCF23G5/16F23G5/20F23G5/44F23G5/50F23G2207/30
Inventor 易斌王艳明吴炜
Owner 江苏弘成环保科技有限公司