Patents by Inventor Soren Bent Christiansen

Soren Bent Christiansen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4108593
    Abstract: A method is disclosed for heat treating pulverulent or granular raw material such as cement meal. Raw material is directed to at least two multi-stage preheater strings, the first string communicating with the kiln by a smoke riser pipe and the second string having a calciner positioned at its lower end portion. The raw material directed to the first preheater string is divided into two divisional flows with the first divisional flow comprising substantially the maximum amount of material which can be substantially completely calcined by hot gases exiting the kiln. The first divisional flow of raw material is directed toward the upper material inlet end portion of the kiln so as to be entrained by the hot gases exiting the kiln, and the hot kiln gases and entrained material are directed to the first preheater string. The second divisional flow is directed to the second preheater string where it is calcined either alone or with raw material directed to the second string.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: August 22, 1978
    Assignee: F. L. Smidth & Co.
    Inventor: Soren Bent Christiansen
  • Patent number: 4045162
    Abstract: A method is disclosed for heat treating granular or pulverulent raw material wherein the raw material is directed to a heat exchanger having at least two preheating units operating in parallel, each preheating unit having at least a first preheating stage and at least a lowermost calcination stage to effect a preheating and at least partial calcination of the material. The preheated, at least partially calcined material is fed from the heat exchanger into a kiln and undergoes a sintering process in the kiln. The sintered material is directed from the kiln into a cooling means in which cooling air is directed in a manner to effect a heat exchange between the material and the cooling air.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: August 30, 1977
    Assignee: F. L. Smidth & Co.
    Inventor: Soren Bent Christiansen
  • Patent number: 4002420
    Abstract: A method is disclosed for heat treating a preheated pulverous raw material containing at least a portion of lime to produce a partial calcination prior to passing the raw material down through an inclined rotary kiln for further heat treatment. Partial calcining is accomplished by introducing into at least one end of a rotary kiln an amount of fuel sufficient for preheating, at least partially calcining, and substantially completely sintering the raw material, at least part of the fuel being introduced into the lower material outlet end portion of the kiln. An amount of oxygen containing gas sufficient for substantial combustion of the fuel introduced into the kiln is introduced into the lower end portion of the kiln, and preheated raw material is introduced into the mouth of the kiln in such a manner that the material is entrained in gases exiting from the kiln mouth.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: January 11, 1977
    Assignee: F. L. Smidth & Co.
    Inventor: Soren Bent Christiansen
  • Patent number: 3982886
    Abstract: Improvements relating to cement manufacture wherein a unique method and a plant for practicing the method are disclosed for removing at least a portion of gaseous compounds containing alkalis, chlorine or sulphur from the exit gases of a rotary kiln in which cement raw meal is burnt to cement clinker with a view to subsequent cement manufacture. The method comprises the steps of dividing the hot exit gases from the rotary kiln into a main gas flow and a separate divisional flow and directing the main flow through a suspension preheater for preheating cement raw meal prior to feeding the raw meal into the kiln. A plurality of individual relatively cool solid condensation bodies are directed to pass through the divisional flow under the influence of gravity to permit the alkalis, chlorine or sulphur to condense on the surface of the bodies and the condensed compounds are removed from the bodies for redirecting them into the separate divisional flow.
    Type: Grant
    Filed: January 16, 1975
    Date of Patent: September 28, 1976
    Assignee: F. L. Smidth & Co.
    Inventor: Soren Bent Christiansen
  • Patent number: 3938949
    Abstract: A method and apparatus is disclosed for burning pulverous or granular material, particularly cement raw material to cement clinker. Burning of the pulverous material is accomplished in a plant which includes a suspension preheater, a rotary kiln and a separate rotary cooler unit having an inlet end and an outlet end, for cooling the burnt material exiting from the kiln by means of air which is subsequently used for combustion and preheating purposes. The method comprises dividing the heated cooling air into at least two streams, directing the divided heat cooling air out of both ends of the rotary cooler unit in its divided streams, directing at least one stream to the rotary kiln to be used as combustion air, directing exhaust gases from the rotary kiln to the preheater to preheat the material, and directing the other stream of heated cooling air to the preheater to preheat the material prior to being burnt in the rotary kiln.
    Type: Grant
    Filed: July 24, 1974
    Date of Patent: February 17, 1976
    Assignee: F. L. Smidth & Co.
    Inventor: Soren Bent Christiansen