Loading patent…
AssigneeDumont Holding Company
InventorsRichard P. Marcotte, John W. Dumont, Jr.
Estimating the term…
An automatic stoker boiler has a heat transfer compartment above a combustion chamber which is divided by a horizontal partition inclined upwardly from the rear end of the boiler towards but terminating short of the front end thereof to provide a restricted port between the thus established upper and lower portions. An endless link belt establishes the lower portion of the combustion chamber and hot gas conduits extend from the upper portion through the heat transfer compartment to the exhaust and which is provided with a draft inducing fan and adjustable damper. Underfire air under the control of an adjustable damper is introduced into the lower portion of the combustion chamber upwardly through the belt and air jets are delivered into the combustion chamber through the front end both above and below the port. A standby fluid fuel burner is located in the rear end of the upper chamber portion. A control, a computerized microprocessor, is provided to ensure the appropriate adjustments of the rate of belt travel, the supply of solid fuel particles delivered thereto, the induced draft and underfire air volume to ensure optimum burning and safe operating conditions in relation to wanted temperatures for space or process heating.
An automatic stoker boiler for space or process heating with steam or hot water, said boiler including a heat transfer compartment having a water inlet and an outlet for steam or hot water, an exhaust, a combustion chamber below said compartment having first and second ends, a transverse partition in said chamber inclined upwardly from the second end and towards but terminating short of the first end to provide a restricted flame and hot gas port and dividing said chamber into upper and lower portions, drive and driven shafts below said chamber, sprockets supported by said shafts, an endless belt of the link type trained about said sprockets and disposed and dimensioned with its upper course forming the grate for the lower portion, means to deliver underfire air upwardly through said upper course, said upper portion having a throat opening adjacent said second end, heat exchanging passageways extending through said compartment and in communication with said throat and said exhaust, means to deliver overfire air into said chamber from said first end above and below said port, means to deliver solid fuel particles to said upper course adjacent said first end, means in said exhaust operable to induce draft in said upper portion and control means operable to effect the advance of said belt by predetermined increments at a wanted rate, means operable to deliver solid fuel to the upper course in predetermined, proportional increments, means to vary the induced draft by predetermined, proportional increments and means to adjust the underfire air volume by predetermined, proportional increments.
Apparatus for advancing solid fuel particles through the combustion chamber of a stoker boiler, said apparatus including a base below said chamber, drive and driven shafts in said base, at least two sprockets supported by each shaft and an endless link belt trained about said sprockets with its upper course the bottom of the chamber and operable to receive and convey fuel through said chamber, means supporting the upper course of the belt, means supporting the lower course thereof, said belt consisting of drive and plain links arranged in first and second groups which alternate throughout the length of the belt, all of said links provided with a central, laterally disposed projection the extent of each of which is slightly in excess of the link width, each drive link includes a tooth at each end, both groups having at least two drive links and a plurality of plain links, the links of the first group all disposed with their projections extending in the same direction thus providing gaps between the ends of the links and the links of the second group having their projections all disposed in the opposite direction thereby to enable the ends of the links of any group to be freely fitted in the gaps of the adjacent groups thus to provide narrow passageways for underfire air, pivot rods interconnecting the interfitted ends of all of the links and the drive links of the two groups so located that corresponding ones engage the same sprockets, and drive means connected to said drive shaft to effect the advancing of said belt.
An automatic stoker boiler for providing by steam or hot water the required temperature for space or process heating, said boiler including a combustion chamber, first means to feed solid fuel particles into and through said chamber at adjustable rates, a heat exchange compartment above said chamber and provided with a water inlet, a steam or hot water outlet and an exhaust, a heat exchanging passageway through the compartment effecting communication between the chamber and the exhaust, second means in said exhaust to induce an overfire draft to establish a predetermined negative pressure in said chamber, said second means including a fan and an adjustable damper on the intake side thereof, third means operable to deliver underfire air into said chamber and including a blower and an adjustable damper in control of the blower output to vary the volume of underfire air, first sensing means responsive to boiler temperature or pressure, second sensing means responsive to the negative pressure in the chamber, third sensing means responsive to outdoor temperatures, fourth sensing means responsive to the temperature provided for space or process heating in relation to the temperature required therefor, and control means operable to effect proportional adjustments of said dampers and the fuel feed rate in directions determined by whether combustion rates need to be increased or decreased relative to maximum temperature or pressure limits and the temperature required for space or process heating.
Dependencies are inferred from the claim text.