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US 4,067,119 AGranted
Method of drying blood
OwnerGlen Overtoninventor
Life of this patent
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OwnerGlen Overtoninventor
Estimating the term…
Animal and poultry blood from slaughter houses and poultryprocessing plants is efficiently dried without loss or destruction of the desirable protein and amino acids content thereof and without creating pollution problems. In one embodiment, the raw blood is ground to break up gelatin-like globules, and masses of impurities such as hair, feathers, hide and the like, has the plasma coagulated at low temperatures, is next finely comminuted to form a free-flowing slurry and is then deposited onto the descending side of the top of a heated drier drum and formed into a film by one or more spreader rolls. In another embodiment, the raw blood is comminuted in a high speed hammer mill, screened, and fed to the drier drum, coagulated on top of the drum and formed into a film by the spreader rolls. The film is rapidly dried and scraped from the ascending side of the drum in the form of a dried sheet which can then either be flaked or pulverized to provide a high grade blood meal product. Liquid dripping from the drier drum is recirculated back to the drum in advance of the layer deposited from the main feed. Vapors above the drying cylinder are scrubbed before being released to the atmosphere and represent the only effluents from the process.
The method of drying blood without destruction of blood solids or discharge of polluting effluents which comprises comminuting the blood to break up globules and lumps therein, coagulating the plasma in the blood at low temperatures, pressing the comminuted coagulated blood on a rotating drier drum heated to temperatures sufficient to evaporate the water content of the blood without destroying or forming a dust from the solid content of the blood to form a film on the drum, drying the film on the drum as it rotates with the drum, scraping the dried film from the drum, and breaking up the film to form a dried blood meal of desired particulate size.
The method of drying animal and poultry blood from slaughter houses and poultry processing plants without destruction of blood solids or discharge of polluting effluents which comprises finely comminuting the raw blood to break up globules and solid masses therein, coagulating the plasma in the comminuted blood at low temperatures on top of a rotating drier drum heated to temperatures of about 250.degree. - 350.degree. F, pressing the coagulated blood on the drum to form a film on the drum surface of desired thickness, drying the film on the drum as it rotates with the drum, scraping the dried film from the drum, recirculating stick water draining from the drum back to the bare surface of the drum in advance of the blood being coagulated on the drum, and rotating the drum at a speed sufficient to keep the blood solids at temperatures insufficient to destroy the protein and amino acid content of the blood.
The method of drying animal and poultry blood from slaughter houses and poultry processing plants without destruction of blood solids or discharge of polluting effluents which comprises grinding the raw blood to break up globules and solid masses therein, injecting steam into the ground blood to coagulate the blood plasma, maintaining the temperature of the blood being coagulated below about 150.degree. F, finely comminuting the coagulated blood, spreading the comminuted coagulated blood on top of a rotating drier drum heated at temperatures of about 250.degree. - 350.degree. F, pressing the spread layer of the comminuted coagulated blood deposited on top of the drum to form a film on the drum, drying the film on the drum, scraping the dried film from the drum, collecting stick water draining from the drum, spreading the stick water on the top of the drum in advance of the layer of comminuted coagulated blood deposited on top of the drum and rotating the drum at speeds sufficient to keep the blood film on the drum for less than about 2 minutes.
In the method of drying blood without destruction of blood solids, the steps of comminuting the blood to break up globules and solid masses therein, coagulating the comminuted blood at low temperatures on top of a rotating heated drier drum, pressing the coagulated blood on the drum to form a film on the drum surface of desired thickness, drying the film on the drum as it rotates with the drum, scraping the dried film from the drum, recirculating stick water draining from the drum back to the surface of the drum in advance of the blood being coagulated on the drum, and rotating the heated drum at a speed sufficient to keep the blood solids at temperatures insufficient to destroy the protein and amino acid content of the blood.
Dependencies are inferred from the claim text.