Combustion monitoring control system of waste wood fuel boiler using non-pre-treatment technology

Abstract

The invention discloses a combustion monitoring control system of a waste wood fuel boiler using a non-pre-treatment technology. By means of monitoring of steam pipe outlet pressure, monitoring of oxygen content of the top of a combustion chamber and monitoring of temperature of slag discharged from a fire grate and by means of control of the rotation speed of a primary air supply fan, the rotation speed of a secondary air supply fan and the rotation speed of a chain grate drive motor, sufficient combustion of fuel and combustion components of the boiler can be well guaranteed no matter what the fuel is, sufficient combustion is achieved, meanwhile the situation that air is exceedingly supplied is avoided, the fuel is fully combusted, the heat efficiency of the boiler is greatly improved, and the combustion monitoring control system can well adapt to use of the waste wood fuel boiler using the non-pre-treatment technology.

Description

technical field [0001] The invention relates to a boiler combustion monitoring system, in particular to a combustion monitoring and control system for waste wood fuel boilers. Background technique [0002] Along with the needs of the development of our country's national economy, in order to solve the problem of utilization of residual waste after wood processing, domestic boiler manufacturers, especially those producing small and medium-sized power station boilers and industrial boilers, have developed boilers that use waste wood fuel as biomass fuel. The waste resources are effectively used, the ecological environment is improved, and it is of great significance to improve the economic and social benefits of the unit. [0003] At present, general biomass boilers have a pretreatment system. Before the fuel enters the combustion chamber, the fuel has been pretreated to specifications with similar dimensions and properties. In the case of fuels with basically the same com...

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Problems solved by technology

[0005] As mentioned above, when the waste wood fuel boiler without pretreatment process is working, the waste wood without pretreatment slides into the furnace according to the funnel structure of the feeding device, and falls on one end of the chain grate, and the chain grate drives the fallen wood. The waste wood moves and burns during the movement. When the waste wood moves to the other end of the chain grate, it is poured into the ash hopper. Due to the specifications, sizes, moisture content, and Materials and other properties are different, so the oxygen and time required for combustion will be different. The existing combustion monitoring and control system cannot adapt to the different needs of different fuels, which will inevitably lead to improper combustion of the fuel in the boiler. It may not be fully burned, and some fuels may be burned prematurely, which can neither ensure full utilization of the fuel, but may also cause overburning and damage to the grate

Its existing combustion organization and monitoring system of biomass boilers with pretreatment process cannot meet the needs, which brings difficulties to the application of waste wood fuel boilers without pretreatment process

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