Combustion monitoring and control system of waste wood fuel boiler without pretreatment process

Abstract

The invention discloses a combustion monitoring and control system for a waste wood fuel boiler without pretreatment process. By monitoring the outlet pressure of the steam pipe, the oxygen content at the top of the furnace, and the temperature of the slag when it is separated from the grate, the primary air supply is monitored. The speed control of the fan, the secondary air supply fan, and the chain grate drive motor can ensure the full combustion of the boiler fuel and combustion components regardless of the nature of the fuel, and can avoid the Excessive air supply maximizes the combustion of fuel and greatly improves the thermal efficiency of the boiler, which can be well adapted to the use of waste wood fuel boilers without pretreatment process.

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 compos...

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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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