Automatic firing rate control mode means for a boiler

Details Automatic firing rate control mode means for a boiler Automatic firing rate control mode means for a boiler

1986-12-18

1988-01-05

Favors, Edward G.

Liquid heaters and vaporizers

Automatic control of fluid fuel and water

Once through

236 14, 364494, F22B 3742, F22D 500

Patent

active

047168587

ABSTRACT:
An automatic firing rate control mode arrangement is provided as a method of operation within a flame safeguard sequencer. The system uses proportional control squared, an integration which reflects the past load history to determine the present load, and further has a constant which relates the rate of change of pressure with respect to time in order to make more responsive the normal load control operation. The system is also capable of on-off control that will hold the system in low fire to allow for stabilization, and to avoid thermal shock to a boiler.

REFERENCES:
patent: 3284615 (1966-11-01), Yetter
patent: 4003342 (1977-01-01), Hodgson
patent: 4373663 (1983-02-01), Hammer
patent: 4403293 (1983-09-01), Bradt et al.
patent: 4451003 (1984-05-01), de Mena et al.
patent: 4457266 (1984-07-01), La Spisa
patent: 4498428 (1985-02-01), La Spisa et al.
patent: 4574746 (1986-03-01), Keyes, IV et al.
patent: 4577270 (1986-03-01), Sugano et al.
patent: 4582026 (1986-04-01), Takita et al.

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