JPS58180595A - Coal dry deashing plant - Google Patents

Abstract

PURPOSE:To save energy by supplying coal on an endless chain conveyer provided with a baffle laid over a bottom wall formed from a lower bottom wall having a gas inlet and an upper bottom wall having a large number of slits, and deashing the coal by difference in specific gravity. CONSTITUTION:On a foundation E, a housing H having a double bottom wall formed from an upper bottom wall 5a having a large number of slits and a lower bottom wall 5b having a gas inlet 7 is fixed, and an endless chain conveyer 3 provided with a baffle is provided around sprocket wheels 2 in the housing H. Several 10-200 mesh coal 21 is supplied via a feeding hole 1 provided in the middle of a side wall to the conveyer 3 moving in the direction of an arrowmark a and fluidized with a gas 25 blown in via the gas inlet 7 to separate high- ash coal 31 downward and low-ash coal 30 upward. The coal 31 is discharged via a discharge opening 8 in the lower portion of the front wall having a height- adjusting gate 1 and the coal 30 is discharged via a discharge opening 9 in the rear wall having a height-adjusting gate 12.

Description

[Detailed description of the invention] The present invention relates to a dry coal deashing apparatus.

Coarse coal with particle size of several mm or less and 200 mesh to number 1
Conventionally, 0 mesh fine powder lime is deashed using a wet method, which increases the amount of moisture attached to the surface of the coal.It is necessary to put it in a dryer to reduce the moisture before burning, which is a problem from an energy-saving perspective. There was a point.

The present invention was proposed for the purpose of solving the above-mentioned problems caused by the conventional wet deashing of coal. It is formed of a double wall with a lower bottom wall having an air supply inlet, a coal input port at a proper location in the center of the side wall, a discharge port with a height adjustment gate at a proper location at the bottom of the rear wall, and a coal inlet at a proper location in the center of the side wall. Each has an outlet with a date for height adjustment at the lower part, and an exhaust outlet on the top wall.Inside the housing, there is an endless baffled chain controller R drive driven by a drive source in a predetermined direction at a predetermined speed. The present invention relates to a coal deashing device characterized in that the coal deashing device is provided with a

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to an embodiment of the present invention shown in the accompanying drawings. In the accompanying drawings, H is the group d
No.Using fixed on E, 1 is said...Using H
An inlet for coal 21 provided at a suitable location in the center of the side wall of the
As shown, there are four sprocket wheels mounted on the housing H, and one of the sprocket wheels 2 is driven by a drive source (not shown). A chain conveyor with an endless baffle 4 is stretched over these sprocket wheels 2, and is run in the direction of arrow a by the sprocket wheels 2 driven by a drive source.

The bottom wall of the housing H is composed of upper and lower double walls.
The space between the upper wall 5a and the lower wall 5b is divided by a partition plate 6 into a plurality of (5 in this example) chambers. Also,
A large number of slits are provided in the upper wall 5a. Reference numeral 7 denotes an air supply (') for supplying an inert gas 25 such as air or N2 gas to each chamber divided by the partition plate B, and the gas 25 from the air supply lower passes through a slit in the upper wall 5a.
The coal 21 supplied from the above-mentioned input 1" 1 and falling into the baffled chain conveyor filter L is given a flow effect (8 is a coal exhaust provided at the lower part of the rear wall of the housing H as shown in the figure). At the outlet, the discharge port 8 is provided with a gel 11 for adjusting the discharge height of the discharge port 8, and the gate 11 is appropriately determined depending on the type of coal to be processed, the amount of coal to be processed, etc. 9 is a housing. As shown in the figure, the front wall of the coal discharge port 9 is provided with a gate 12 for adjusting the height of coal discharge.
The height adjustment is made as appropriate depending on the type of coal to be processed, the amount of coal to be processed, etc. In addition, the traveling speed of the endless double chain conveyor B should be determined in the same manner. 10 is an exhaust [ ] of the exhaust 24 provided on the top wall of the Uzing H.

One embodiment of the device of the present invention is constructed as described above, and when the device starts operating, the coal 21 fed through the inlet 1 is transferred to the baffled chain conveyor 6 running at a predetermined speed. The gas on top is fluidized by the gas 25 blown in from each air supply 17. The coal 21 is a mixture of coal 61 with a high ash content and coal 60 with a low ash content, and the coal 61 with a high ash content has a lower specific gravity than the coal 30. Since the coal has a large ash content, when subjected to the flow action as described above, the coal with a low ash content
Due to the difference in specific gravity, the coal 61 lies on top of the coal 61, which has a large ash content. In this case, since the endless chain conveyor with baffles is running at a predetermined speed in the direction of arrow a, the coal 61 with a high ash content in the lower part of the chain conveyor 6 is transported by The coal 30 in the upper part of the fluidized bed, which has a low ash content, is also discharged from the discharge port 9 due to the flow action and is sent to the next process 22. Sent out. In this case, the coal input from the input port 1 is only subjected to the fluidizing action by the gas 25 blown from the supply air [17], so the moisture content of the coal does not increase during the treatment, and therefore the drying treatment is not performed. There's no need.

An example of an experiment in which a coal deashing test was conducted using this device is as follows.
As shown in the attached table, it was confirmed by the deceased that the reject (coal with high ash content) had a high ash content and had been deashed. In addition, when the yield of Jingen (coal with low ash content) is low, the rejects are re-deashed and
A multi-stage demineralization process will be performed to recover the flames.

Since the device of the present invention has the above-described configuration and function, the present invention eliminates the drawbacks of the conventional wet method, eliminates the need for drying after deashing, and therefore saves money. The practical effect of realizing a coal deashing device that is useful for energy consumption can be raised.

[Brief explanation of drawings]

The attached drawing is a schematic vertical cross-sectional view of one embodiment of the present invention, and the attached table is a table of experimental data of the apparatus of the present invention. H: Housing, 1: Inlet, 2: Sprocket wheel, 6: Endless chain conveyor with buttful, 4: Baffle, 5a: Upper bottom wall, 5b: Lower bottom wall, 6: Partition plate, 7: Air supply port, 8, 9: Exhaust "", 10: Exhaust", 11.12
: Gate for adjusting the height of the discharge port, 21: Coal, 60: Coal with low ash content, 61: Coal with high ash content. Procedural amendment August 6, 1980 Kazuo Wakasugi, Commissioner of the Japan Patent Office1, Indication of the case 1982 Patent Application No. 640002, Relationship with the title of invention case Patent application office 100 Tokyo 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Name (620) Mitsubishi Heavy Industries, Ltd. Representative Yano Men 4 Sub-Agent Address Toranomon Sangyo Building, 2-29 Toranomon-chome, Minato-ku, Tokyo 105 TEL ( 501) 3706 Name
(6501) Patent Attorney Teru Ito (2 others) 5. Date of amendment order: July 9, 1980 7. Subsistence of amendment (1) The entire specification is revised as per the attached amended specification. (2) Delete the experimental data table in the drawing. Amended specification 1, title of the invention] Coal dry deashing device 2, Claims Foundation-hK is fixedly installed, the bottom wall is one L part bottom wall having a large number of slits, and the lower part having an air supply port It is formed of a double wall on the bottom wall, has a coal input port at an appropriate location in the center of the side wall, an outlet with a height adjustment gate at an appropriate location at the bottom of the rear wall, and a height adjustment gate at an appropriate location at the bottom of the front wall. An endless chain conveyor with baffles, which is driven by a drive source at a predetermined speed in a predetermined direction, is installed in a housing that has an exhaust [ ] on the top wall and is provided with a discharge [ ] each having an adjusting dart. A coal deashing device characterized by: 3. Detailed Description of the Invention The present invention relates to a dry coal deashing apparatus. Coarse coal with particle size of several mm or less and 200 mesh to number 1
Since 0 mesh pulverized coal is conventionally deashed using a wet method, moisture builds up on the surface of the coal and requires an operation to reduce this moisture by placing it in a dryer before sintering. There was a problem. The present invention was proposed for the purpose of solving the problems caused by the conventional wet deashing of coal. It is formed of a double wall with a lower bottom wall having an air hole, a coal input 1] at an appropriate position in the center of the side wall, and an outlet [-1] with a height adjustment gate at an appropriate position at the lower part of the rear wall. In addition, an exhaust port with a height adjustment gate is provided at the lower part of the front wall, and an exhaust port is provided at the top of the housing. This invention relates to a coal deashing device characterized by being equipped with a chain conveyor with baffles. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to an embodiment of the present invention shown in the accompanying drawings. In the attached drawings, H is a housing fixed on a foundation E, 1 is an inlet for coal 21 provided at an appropriate location in the center of the side wall of the housing H, and 2 is a coal 21 inlet installed on the housing H as shown in the figure. One of the sprocket wheels 2 is driven by a driving source (not shown). This is a chain conveyor with baffles 4, which are stretched over the sprocket wheels 2, and are run in the direction of the arrow a by the sprocket wheels 2 driven by a drive source. The bottom wall of the housing H is composed of upper and lower double walls, and the space between the upper wall 5a and the lower wall 5b is divided into a plurality of chambers (5 in this example) by a partition. Color. Moreover, multiple slits are provided in the upper wall 5a. 7
is air or nitrogen in each room divided by the partition root 6.
An inert gas 25 such as a gas is supplied from the air supply port 25 from the air supply lower through the slit in the upper wall 5a, and is supplied from the above-mentioned input 1 to the baffled chain conveyor 6F. 8 is attached to the lower part of the rear wall of the housing H.
Coal discharge 1] installed as shown in Figure 1, and coal discharge 1]8
is provided with a gate 11 for adjusting the discharge height of the discharge port 8, and the gate 11 is appropriately determined depending on the type of coal to be treated and the amount of coal to be treated. Reference numeral 9 denotes a coal discharge port 1 provided on the front wall of the housing H as shown in the figure, and the discharge port 9 is also provided with a date 12 for adjusting the height of coal discharge. The adjustment depends on the type of coal being processed,
This should be done as appropriate depending on the throughput, etc. Also, the running speed of the endless double chain conveyor should be determined in the same way. One embodiment of the apparatus of the present invention is constructed as described above, and when the operation of the apparatus is started, the coal 21 introduced from the input 11 is transferred to a chain with a bumper running at a predetermined speed. The coal on the conveyor 6 is activated by the gas 25 blown in from each supply air [17.
Coal 61, which has a large amount of ash and has a large amount of ash,
Because it has a higher specific gravity than coal filter O, which contains less ash,
When subjected to the flow action as described above, the coal 60 with a small ash content becomes larger due to the difference in specific gravity (-Coal wheel, 6: Endless chain conveyor with panfur, 4: Baffle Ra: Upper bottom wall, 5b : Lower bottom wall, 6: Partition machine, 7:
Air supply port, 8, 9: Discharge port, 10: Exhaust port, 11, 12:
Gate for adjusting height of discharge port, 21: Coal, 60: Coal with low ash content, 61: Coal with high ash content. Sub-agent Patent attorney Akira Ito (2 others)

Claims (1)

[Claims] It is fixedly installed on the foundation, and the bottom wall is formed of a double wall of an upper bottom wall with many slits and a lower bottom wall with an air supply port, and has a coal input port at an appropriate location in the center of the side wall, An outlet with a height adjustment gate is provided at the lower part of the rear wall, and an outlet with a height adjustment gate is provided at the lower part of the front wall. 1. A coal deashing device comprising an endless baffled chain conveyor driven in a predetermined direction at a predetermined speed by a source.