Fume-monitoring photoelectric alarm

An alarm and photoelectric technology, applied in the field of alarms, can solve the problems of incomplete dust removal, atmospheric environmental pollution, high temperature of soot, etc., and achieve the effects of simple structure, improved precision, and strong activity

Inactive Publication Date: 2013-03-20
丁长来
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Due to the large investment in the existing industrial coal-fired flue gas dust removal technology (such as the steel structure positive pressure inner filter bag dust removal system, etc.), the dust cannot be completely removed, the temperature of the discharged soot is high, and the flue gas contains a large amount of sulfur dioxide, three The shortcomings of harmful gases such as sulfur oxides have caused extremely serious pollution to the atmospheric environment of our country, and have become an important factor for the increase of acid rain in cities and global warming.

Method used

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  • Fume-monitoring photoelectric alarm

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Embodiment Construction

[0007] Such as figure 1 The smoke and dust monitoring photoelectric alarm shown includes a light modulation circuit, the light modulation circuit supplies power to the light emitting circuit, the output end of the light emitting circuit is connected to the input end of the light receiving circuit, and the output end of the light receiving circuit is connected to the signal amplification circuit The input end of the signal amplification circuit is connected with the input end of the judgment circuit, and the output end of the judgment circuit is connected with the alarm circuit through the phase-locked loop circuit.

[0008] In the present invention, if the turbidity of the flue increases, the light emitted by the light source is absorbed and refracted by the smoke particles, and the light reaching the photodetector decreases, so the intensity of the output signal of the photodetector can reflect the change of the turbidity of the flue When the present invention works, the ligh...

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Abstract

The present invention discloses a fume-monitoring photoelectric alarm, belonging to the field of alarm devices. The fume-monitoring photoelectric alarm includes a light modulation circuit which supplies power to a light emitting circuit; the output terminal of the light emitting circuit is connected with the input terminal of a light receiving circuit; the output terminal of the light receiving circuit is connected to a signal amplifying circuit; the output terminal of the signal amplifying circuit is connected to the input terminal of a decision circuit; and the output signal of the decision circuit is connected with an alarm circuit via a phase-locked loop circuit. According to the present invention, analog-digital circuit is used to complete the monitoring of fumes, thereby improving the accuracy of detection; and the alarm has simple structure, good flexibility, and operational stability. The fume-monitoring photoelectric alarm can be used in the monitoring of fumes.

Description

technical field [0001] The invention relates to an alarm, in particular to a photoelectric alarm. Background technique [0002] Coal is an indispensable and important fuel for modern industry. Cement calcination, metal smelting, thermal power generation, heat treatment, etc., which use coal as fuel, occupy a very important position in my country's industry. There are countless heating boilers, and the fuel consumption is very huge. Due to the large investment in the existing industrial coal-fired flue gas dust removal technology (such as the steel structure positive pressure inner filter bag dust removal system, etc.), the dust cannot be completely removed, the temperature of the discharged soot is high, and the flue gas contains a large amount of sulfur dioxide, three The shortcomings of harmful gases such as sulfur oxides have caused extremely serious pollution to our country's atmospheric environment, and have become an important factor in the increase of urban acid rain ...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N21/35G01N15/06
Inventor丁长来
Owner丁长来