Drying and gas or vapor contact with solids – Process – Diverse types of drying operations
Patent
1996-01-11
1997-11-04
Sollecito, John M.
Drying and gas or vapor contact with solids
Process
Diverse types of drying operations
34210, 34236, 56 128, 56 133, F26B 700
Patent
active
056826834
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to a process for picking up, drying, and pressing biomass (stalk material), as well as to a device for carrying out this process.
BACKGROUND OF THE INVENTION
A traveling drying unit for drying harvested material, in which the stalk material picked up is fed, without being chopped, into a drying device by means of a lift conveyor, has become known from DE-A-1 632 887. This drying device comprises a plurality of flinger rolls, which extend at right angles to the direction of travel, and under which a trough-shaped wall each is located. In addition, air heated by flames is blown by means of a blower into the drying device. The stalk material is flung up by the flinger rolls and is said to be transferred as a result to the respective adjacent flinger roll. The flinger rolls are arranged at three levels one on top of another. From the last flinger rob of the lowermost level the dried harvested material then enters a plunger-type press, where the harvested material is compressed into a strand of finite length extending in the transverse direction. The strand is then cut into slices by means of circular knives, and these slices are said to crumble spontaneously on falling into a lift conveyor channel. Compressed feed in the form of wafers is apparently to be produced in this manner.
Such a harvester consumes a considerable mount of energy due to the air being heated by flames and due to the drive of the ringer rolls. The prior-art unit causes environmental nuisance due to the fuel consumption and the noise generated by the high speeds of rotation of the ringer rolls. The wafers produced are not suitable for use as a fuel.
SUMMARY AND OBJECTS OF THE INVENTION
In contrast, the basic object of the present invention is to carry out the pick-up, drying, and compression of the harvested material in a different manner, which is characterized by saving energy, low noise, and being environmentally acceptable, wherein the compressed harvested material shall be used not only as a feed, but also as a fuel.
According to the invention, a process and device provided for picking up, drying and pressing biomass, particularly harvested biomass material. The process includes using a harvester to pick up and convey harvested material upwardly. The material is transferred to a dryer wherein the dryer is provided with a plurality of conveying rolls arranged one on top of another at different levels. Each level of the dryer has a plurality of conveying rolls disposed next to each other. The harvested material is transferred in a broad layer on to the conveying rolls located in an upper level. The harvested material is moved while exposing the harvested material to gashes heating medium. The harvested material is moved along an axis of the conveying rolls in an upper level and is deflected onto a next lower level conveying roll level at an end of the conveying roll in the upper level. The gaseous heating medium is guided at a right angle with respect to the conveying rolls, through the different levels. The harvested material is fed from the conveying rolls to a pressing device. The harvested material is pressed with the pressing device including chopping and pelletizing the harvested material with the pressing device.
The harvester is provided with a pick up device and a lift conveyor for the harvested material. A drying device is provided with the conveying rolls including the different conveying roll levels with each level having a plurality of conveying rolls arranged next to each other. A transfer device is provided for transferring the harvested material to the next lower conveying roll. Flow means is provided for generating a flow of gaseous heating medium. Additionally, a chopper feed means for the gaseous heating medium and a pressing device are provided.
Unlike in the aforementioned state of the art, the harvested material is fed in the chopped state into the drying device, in which the harvested material is moved along the conveying rolls in a broad, but relatively
REFERENCES:
patent: 3572663 (1971-03-01), Van Der Lely
patent: 3998036 (1976-12-01), Jarrell
patent: 4912914 (1990-04-01), Wingard
patent: 5443208 (1995-08-01), Potter
Webster's II New Riverside Dictionary.RTM. 1994 pp. 148 & 868 1994.
Gravini Steve
Haimer Franz
Sollecito John M.
LandOfFree
Process and device for pressing biomass does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and device for pressing biomass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and device for pressing biomass will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1824131