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Automatic control method and system device for adjustment on load of biogas supplied for steam boiler

An automatic control system and steam boiler technology, which is applied in the control system, steam generation, lighting and heating equipment, etc., can solve the problems that biomass gas is not suitable for boilers, so as to reduce the amount of human intervention, realize stable load changes, and ensure The effect of stable and reliable operation

Inactive Publication Date: 2015-04-08
广东绿壳新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As mentioned above, there is a big difference in the supply of biomass gas and traditional fuel, and the existing oil-fired gas-fired boiler control method is not suitable for the occasion of using biomass gas to supply the boiler, so it is necessary to establish a biogas-supplied steam boiler Automatic Control System

Method used

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  • Automatic control method and system device for adjustment on load of biogas supplied for steam boiler
  • Automatic control method and system device for adjustment on load of biogas supplied for steam boiler
  • Automatic control method and system device for adjustment on load of biogas supplied for steam boiler

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the gasification fan is an active regulating fan, and the other fans are passive regulating fans. The core of load control is the given method of the gasification air volume command. Under the normal working conditions of biomass gasifier and steam boiler, the gasification air volume basically determines the gas output of the gasifier, and the gas volume determines the steam output, so it can be considered that controlling the gasification air volume is equivalent to controlling the gas volume , the steam output can be controlled by controlling the gasification air volume, see image 3 , a given formula for gasification instructions is listed. The following is the control method of the driven regulating fan: the oxygen distribution fan of the burner is controlled according to the calibration value of the oxygen distribution amount and the gasification air volume, following the gasification air volume command, and the control goal is to ensur...

Embodiment 2

[0031] Such as figure 2 , In this embodiment, on the basis of Embodiment 1, a gas induced draft fan and a gas induced draft fan frequency converter are installed at the front end of the burner. In this embodiment, the gasification fan is used as an active regulating fan, and the other fans are all driven regulating fans. The core of load control is the method of setting the gasification air volume command. The gas induced draft fan is used as a driven regulating fan, and the gas induced draft fan is regulated by the gasification air volume command and the gas pressure value of the furnace top. The driven fan is the same as in Embodiment 1.

Embodiment 3

[0033] Such as figure 2 As shown, in this embodiment, the gas-fired induced draft fan is used as the active regulating fan, and the other fans are all driven regulating fans. The core of load control is the given method of gas quantity command. Under the normal working condition of biomass gasifier and steam boiler, the amount of gas determines the steam output, and the steam output can be controlled by controlling the amount of gas. Figure 4 A given formula of gas quantity command is listed. The following is the control method of the driven regulating fan: the gasification fan is adjusted according to the gas volume command and the pressure value of the furnace top gas. The control method of the oxygen distribution fan and the flue gas induced draft fan is similar to that of Example 1. The oxygen distribution fan of the burner is controlled according to the calibration value of the oxygen distribution amount and the gas volume, following the gas volume command; the f...

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Abstract

The invention relates to a biogas supplying system, in particular to a control method and a system device for adjustment on load of biogas supplied for a boiler. The running frequency of an active adjusting fan is controlled by an automatic controller, the active adjusting fan delivers a given amount of gasified air or a given amount of gas, the amount of steam generated by the steam boiler during combustion is controlled through the given amount of gasified air or the given amount of gas, steam pressure sensor signals and steam flow meter signals which serve as feedback signals enter the automatic controller, and a closed-cycle control loop is formed. The load of a biomass gasifier is changed stably, gas of a combustor of the boiler is combusted sufficiently and reasonably, the gas pressure of a hearth is stable, and steam is stably supplied within a set pressure range. By a control system, the problem that the existing fuel and gas boiler control method is not suitable for places at which the biogas is supplied for steam boilers is solved, the ability on matching between the biomass gasifier and the steam boiler is improved to a maximum degree, and the biomass gasifier and the steam boiler are unified and coordinated and are controlled automatically.

Description

technical field [0001] The invention relates to a biogas supply system, in particular to a load regulation control method and a system device for a biogas supply boiler. Background technique [0002] Biomass energy is second only to coal, petroleum gas and natural gas and ranks fourth in the world's total energy consumption, and occupies a very important position in the energy system. Biomass gas technology has entered industrialization after years of development. The fuel used in the fuel-fired gas-fired boilers currently used is generally diesel, heavy oil, coal-water slurry, natural gas, etc. Diesel and heavy oil have high costs and high pollutant emissions, and the pollutant emissions of coal water slurry are not ideal under today's severe environmental pressure. Biogas not only has the same emission standards as natural gas, but also has a higher price than natural gas. It is a cheap and high-quality alternative energy source. [0003] The existing oil-fired and gas-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B35/00
Inventor 谭建林司学明程中军廖林镇
Owner 广东绿壳新能源有限公司
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