GB109688A - Improvements in Steam Jacketed Heating or Boiling Pans and like Receptacles. - Google Patents

Abstract

109,688. Senior, H. V. Nov. 4, 1916. Heating liquids; boiling-pans.- In a self-contained steam-jacketed heating or boiling pan for use in rendering lard and similar operations, the generator portion is formed as a separate member secured centrally to the lower portion of the jacket b and is of shallow depth and presents a large surface to the heater e from which the hot gases are directed ever the exterior of the jacket. The generator may take the form of a lenticular chamber f as shown in Fig. 1, or of a spiral pipe k as shown in Fig. 2. The pan a and jacket b are supported in an external casing c lined with heat-insulating material d and provided at its upper end with a series of equally spaced passages o which secure a uniform heating of the jacket and conduct the burnt gases to an annular chamber p connected to a flue. The air and gases, before reaching the burners e, are preferably pre-heated by passing them through a pipe 1, Fig. 1, or through separate pipes, or through an annular chamber located inside the casing c. Complete evaporation of the water in the generator and superheating of the steam produced may be carried out, and the temperature may be controlled by a thermostat which regulates the supply of fuel to the burners e. The surface area of the pan and jacket may be increased by corrugating or fluting, and the pan may be formed with an upwardly extending conical or like projection at its base. The pan may be mounted on trunnions as shown in Fig. 2 so as to be capable of tilting.