Method and apparatus for upgrading low rank coal
First Claim
1. A method for upgrading low rank coal comprising the steps of;
- drying said low rank coal into dried coal;
carbonizing said dried coal into carbonized coal;
cooling said carbonized coal; and
causing said cooled carbonized coal to adsorb tar produced from said dried coal in the carbonizing process to provide improved coal, wherein inflow of the outside atmosphere into a drying process atmosphere of said low rank coal as well as a tar adsorbing process atmosphere of said cooled carbonized coal is restrained, and wherein mixing of gas generated from said low rank coal during the drying and dehydrating process with gas generated from said dried coal during the carbonizing process at the time when said dried coal is fed into the carbonizing process atmosphere, as well as mixing of said gases with cooling process atmosphere gas of said carbonized coal and tar adsorbing process atmosphere gas of said cooled carbonized coal at the time when said carbonized coal is fed into the cooling process atmosphere, are also restrained.
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Accused Products
Abstract
A method and apparatus for upgrading low rank coal, wherein the sealing efficiency between the inside and the outside of a system and between the successive stages of apparatus is improved. Such improvement is provided between a drying apparatus for drying low rank coal into dried coal and a carbonizing apparatus for carbonizing the dried coal into carbonized coal and between the carbonizing apparatus and a cooling/adsorbing apparatus for cooling said carbonized coal and the cooled carbonized coal is caused to absorb therein a tar produced from the carbonization of the dried coal to thereby provide improved coal. In this method and apparatus inflow of an outside atmosphere from the outside into the inside of the system and mixing of gases between said successive stages of apparatus is restrained so that low rank coal is able to be favorably and consecutively upgraded regardless of operating pressures of the respective stages of apparatus.
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Citations
17 Claims
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1. A method for upgrading low rank coal comprising the steps of;
- drying said low rank coal into dried coal;
carbonizing said dried coal into carbonized coal;
cooling said carbonized coal; and
causing said cooled carbonized coal to adsorb tar produced from said dried coal in the carbonizing process to provide improved coal, wherein inflow of the outside atmosphere into a drying process atmosphere of said low rank coal as well as a tar adsorbing process atmosphere of said cooled carbonized coal is restrained, and wherein mixing of gas generated from said low rank coal during the drying and dehydrating process with gas generated from said dried coal during the carbonizing process at the time when said dried coal is fed into the carbonizing process atmosphere, as well as mixing of said gases with cooling process atmosphere gas of said carbonized coal and tar adsorbing process atmosphere gas of said cooled carbonized coal at the time when said carbonized coal is fed into the cooling process atmosphere, are also restrained. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- drying said low rank coal into dried coal;
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8. An apparatus for upgrading low rank coal comprising:
- a drying apparatus for drying said low rank coal into dried coal;
a carbonizing apparatus for carbonizing said dried coal into carbonized coal; and
a cooling/adsorbing apparatus for cooling said carbonized coal and causing the cooled carbonized coal to adsorb tar produced from said dried coal in the carbonizing process to provide improved coal, wherein said drying apparatus is provided with means for supplying said low rank coal thereto while restraining the inflow of the outside atmosphere, said drying apparatus is connected with said carbonizing apparatus through means having a function to feed said dried coal from said drying apparatus to said carbonizing apparatus and a function to restrain mixing of inner gas of said drying apparatus with inner gas of said carbonizing apparatus, said carbonizing apparatus is connected with said cooling/adsorbing apparatus through means having a function to feed said carbonized coal from said carbonizing apparatus to said cooling/adsorbing apparatus and a function to restrain mixing the inner gas of said carbonizing apparatus with the inner gas of said cooling/adsorbing apparatus, and wherein said cooling/adsorbing apparatus is provided with means for taking said improved coal out of the system while restraining the inflow of the outside atmosphere. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
- a drying apparatus for drying said low rank coal into dried coal;
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16. An apparatus for upgrading low rank coal which comprises:
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a drying apparatus; a first rock hopper for supplying a low rank coal to said drying apparatus while restraining the inflow of outside atmosphere located at an inlet of said drying apparatus through which said low rank coal is fed to be dried into dried coal; a carbonizing apparatus for carbonizing the dried coal; a first rotary feeder for feeding dried coal from said drying apparatus to said carbonizing apparatus, said first rotary feeder comprising an outer cylinder having an inlet opening and an outlet opening for said dried coal, a rotary shaft provided in said outer cylinder to be rotatable about the axis of said outer cylinder, a driver for rotating said rotary shaft, a plurality of partitions radially mounted to said rotary shaft and having such a length as not to impair their rotations within said outer cylinder, and a plurality of shield plates mounted on said partitions to intermittently close said openings upon rotation of said rotary shaft and said rotary feeder being arranged to connect an outlet of said drying apparatus through which said dried coal is discharged to an inlet of the carbonizing apparatus through which said dried coal is fed thereto to be carbonized into carbonized coal; a cooling/adsorbing apparatus for cooling the carbonized coal and for contacting the cooled coal with tar to be adsorbed by said cooled coal; a second rotary feeder for feeding carbonized coal from said carbonizing apparatus to said cooling/adsorbing apparatus, said second rotary feeder comprising an outer cylinder having an inlet opening and an outlet opening for said carbonized coal, a rotary shaft provided in said outer cylinder to be rotatable about the axis of said outer cylinder, a driver for rotating said rotary shaft, a plurality of partitions radially mounted to said rotary shaft and having such length as not to impair their rotations within said outer cylinder, and a plurality of shield plates mounted on said partitions to intermittently close said openings upon rotation of said rotary shaft and said second rotary feeder being arranged to connect an outlet of said carbonizing apparatus through which said carbonized coal is discharged to an inlet of the cooling/adsorbing apparatus through which said carbonized coal is fed to be cooled, and means for introducing as tar produced from the carbonization of said dried coal into the cooling/adsorbing apparatus to be adsorbed into the cooled carbonized coal to produce an improved coal; and a second rock hopper for taking said improved coal out of the cooler/adsorbing apparatus while restraining the inflow of outside atmosphere arranged at an outlet of said cooling/adsorbing apparatus through which said improved coal is discharged from the apparatus. - View Dependent Claims (17)
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Specification