초록 ▼

A flue gas conditioning system generates sulfur trioxide which is injected into boiler flue gas to condition it by reducing the resistance of the particulate matter entrained in the flue gas. The conditioned flue gas is passed through an electrostatic precipitator which collects the particulate matt

A flue gas conditioning system generates sulfur trioxide which is injected into boiler flue gas to condition it by reducing the resistance of the particulate matter entrained in the flue gas. The conditioned flue gas is passed through an electrostatic precipitator which collects the particulate matter by electrostatic precipitation. The sulfur trioxide concentration in the flue gas is measured with a mass spectrometer downstream of where the sulfur trioxide was injected into the flue gas and upstream of the electrostatic precipitator. The concentration of the sulfur trioxide in the flue gas is measured with a mass spectrometer at a point where the injected sulfur trioxide has uniformly mixed with the flue gas. The measured sulfur trioxide concentration is used to control the flue gas conditioning system, such as by comparing the measured concentration to a desired concentration range and adjusting the amount of sulfur trioxide being injected into the flue gas accordingly.

대표청구항 ▼

A method of conditioning a boiler flue gas for removal of entrained particulate matter by an electrostatic precipitator, comprising the steps of: a. providing a flow of conditioning agent at a controlled rate; b. mixing the conditioning agent with a flow of boiler flue gas to condition the flue gas;

A method of conditioning a boiler flue gas for removal of entrained particulate matter by an electrostatic precipitator, comprising the steps of: a. providing a flow of conditioning agent at a controlled rate; b. mixing the conditioning agent with a flow of boiler flue gas to condition the flue gas; c. directing the boiler flue gas mixed with the conditioning agent through an electrostatic precipitator; d. periodically measuring the concentration of the conditioning agent in the boiler flue gas with a mass spectrometer; e. comparing the measured concentration of the conditioning agent to a desired concentration range; and f. adjusting the controlled flow of conditioning agent when the measured concentration is not within the desired concentration range to bring the concentration of conditioning agent in the boiler flue gas within the desired concentration range. A boiler system having a flue gas duct for conveying flue gas from a fuel combustion chamber of the boiler to a particulate removing device, the boiler system having a system for conditioning the flue gas by introducing a conditioning agent into the flue duct for mixing with the flue gas, the improvement comprising: a. means for providing a flow of the conditioning agent at a controlled rate; b. means coupled to the conditioning agent providing means for introducing the conditioning agent into the flue duct for mixing with the flue gas; c. means coupled to the flue duct for periodically measuring the concentration of the conditioning agent in the flue gas; d. control means coupled to the measuring means and the conditioning agent providing means for comparing the measured concentration of flue gas with a desired concentration range stored in a memory of the control means and adjusting the controlled flow of conditioning agent when the measured concentration is not within the desired range to bring the concentration of conditioning agent in the flue gas within the desired range.