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A real-time measurement method for the residence time of flue gas in a waste incinerator at 850°C

A waste incinerator and residence time technology, which is applied in the monitoring field of power station boilers, can solve problems such as difficult natural degradation, human health and ecological environment safety hazards, and achieve good linearity, high sensitivity, stability and uniformity Effect

Active Publication Date: 2019-06-14
XIAN THERMAL POWER RES INST CO LTD
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  • Application Information

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Problems solved by technology

Dioxin is by far the most toxic by-product of human unconscious synthesis. It has stable physical and chemical properties and is difficult to degrade naturally. It poses a huge safety hazard to human health and the ecological environment.

Method used

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  • A real-time measurement method for the residence time of flue gas in a waste incinerator at 850°C
  • A real-time measurement method for the residence time of flue gas in a waste incinerator at 850°C
  • A real-time measurement method for the residence time of flue gas in a waste incinerator at 850°C

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Embodiment Construction

[0057] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0058] A method for real-time measurement of residence time of flue gas in a waste incinerator at 850°C, comprising the following operations:

[0059] 1) Construct the real-time temperature field distribution along the furnace height in the incinerator:

[0060] In the waste incinerator, set multiple smoke temperature measuring points along the height direction of the vertical flue of the furnace, and the smoke temperature measuring points extend into the furnace to a depth of 200mm to 400mm; the real-time temperature field distribution in the incinerator is linearly attenuated along the height of the furnace, that is, The temperature at the lower part of the furnace is always greater than the temperature at the outlet of the furnace, and can be fitted with a linear function;

[0061] Specif...

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Abstract

The invention solves the problem to provide a real-time measurement method for retention time of flue gas in a garbage incinerator at 850 DEG C, comprising the steps of building real-time temperature field distribution along the furnace height in the incinerator, determining flue gas temperature change gradient in a flue, correcting flue gas velocity in real time, and determining whether the retention time of the flue gas in a hearth at the temperature of not lower than 850 DEG C can meet 850 DEG C / 2S emission index verification under the running of a garbage power plant; during the running of a unit, collecting a thermocouple measurement value in real time by a DCS (distributed control system), displaying the value on a DCS display and sending to an SIS system of the power plant synchronously, receiving data, sent from the DCS, by the SIS system, then storing in a real-time server of the SIS system, transmitting the data to a compute server, calculating the retention time t of the flue gas at the temperature of higher than 850 DEG C in real time, and a position at the temperature below 850 DEG C, and displaying in the production process of an SIS page in real time; operating crew of the power plant can monitor in the SIS page in real time, and monitor the retention time, meeting the temperature condition of 850 DEG C, of the flue gas in the hearth, so that the environmental requirement is met.

Description

technical field [0001] The invention belongs to the technical field of power plant boiler monitoring, and relates to a real-time measurement method for the residence time of flue gas in a garbage incinerator under the condition of 850°C. Background technique [0002] Dioxin, also known as dioxin, is a colorless, odorless, highly toxic fat-soluble substance that can interfere with the body's endocrine and cause extensive health effects. Dioxin is an environmental pollutant and belongs to "Twelve Hazards". Garbage incineration is likely to cause secondary pollution, among which dioxin pollution is the most harmful. Dioxin is by far the most toxic by-product synthesized unconsciously by humans. It has stable physical and chemical properties and is difficult to degrade naturally. It poses a huge safety hazard to human health and the ecological environment. Solid waste incineration is one of its main sources, and according to statistics, its contribution rate can reach 50%-80%....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/32
CPCG01N25/32
Inventor 王智微刘廷钰刘超飞
Owner XIAN THERMAL POWER RES INST CO LTD
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