JPS6153390A - Temperature control for modification unit for low-quality coal - Google Patents

Abstract

PURPOSE:The temperature of low-quality coal is accurately detected in the modification unit to control the temperature for treating coal with heat in individual sections to effect stabilized quality modification under optimal conditions. CONSTITUTION:The temperatures in the coal are detected in drying unit 2, dry- distillation unit 4 and cooling and adsorption unit 6 and the detected temperatures are fed back to control the temperatures of thermal media fed into the drying unit 2 and the dry distillation uit 4 and the feed of cooling water into cooling and adsorption unit 6 to effect the quality modification of low-quality coal.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a temperature control method for an apparatus for improving the quality of low-rank coal, and in particular to a method for controlling the temperature of a low-rank coal quality improvement device, and in particular, a method for controlling the temperature of a low-rank coal that is suitable for controlling the heat treatment temperature of coal in each section. The present invention relates to a temperature control method for a quality improvement device.

[Background of the invention]

In heat treatment equipment such as drying equipment, it is very difficult to measure the temperature of the material to be heat treated, and generally KV
Rock Ta1k Manual 2 In each of the examples shown, the temperature of the material to be heat treated can be estimated from the atmospheric concentration inside the heat treatment equipment using a thermocouple installed in the heat treatment equipment, or the internal flame can be measured using an infrared thermometer, such as in a blast furnace. Generally, it is detected.

In order to control the temperature of low-rank coal in an apparatus for improving the quality of low-rank coal by feeding back the indirectly detected temperature in this way, there is a problem in that the accuracy of the detected temperature is low.

[Purpose of the invention]

The purpose of the present invention is to accurately detect the temperature of low-rank coal in equipment for improving the quality of low-rank coal. An object of the present invention is to provide a temperature control method for a temperature control device.

[Summary of the invention]

The present invention detects the temperature within the coal seam inside each of the drying equipment, carbonization equipment, and cooling/adsorption equipment, and feeds back the detected temperature to determine the temperature of the heating medium supplied to the drying equipment and carbonization equipment, and the cooling/adsorption equipment. It is characterized by controlling the amount of cooling water supplied to the S suction equipment, and by accurately detecting the temperature of the low-rank coal in each equipment, it is possible to appropriately control the temperature. .

[Embodiments of the invention]

As mentioned above, it is difficult to accurately measure the temperature of coal in heat treatment equipment. Particularly when the heat treatment equipment is a rotating body such as a kiln, the ambient temperature is often measured rather than the temperature of the coal itself.

Therefore, we embedded thermocouples in various parts of the pilot plant. Summarizing the results, we found that because this device has a slow heat treatment speed, even if the heat-treated coal moves one after another, by embedding a thermocouple in it, it is possible to accurately detect the temperature of the coal. I understand. Therefore, in order to know the temperature of the coal, which is the material to be heat treated, we create a space at the outlet of the drying equipment, carbonization equipment, and cooling/adsorption equipment where the heat-treated coal stays at all times, and embed a thermocouple in that space. I figured it out. If the coal temperature can be detected in this way, it is possible to control the temperature based on the relationship between the heating or cooling temperature and the coal temperature obtained as a result of a pilot test.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Figure 1 shows the flow of a temperature control method for a low-rank coal quality improvement device incorporating the present invention. Low-rank coal 1 is supplied to a drying device 2, where after drying, it is carbonized via a rotary feeder 3. It is sent to device 4. After the dry coal is carbonized here, it is sent to a cooling/adsorption device 6 via a tarry feeder 5, where it is cooled.

After tar adsorption, the reformed coal is sent out of the system via a hob puff.
It is discharged as.

The rotation of the rotary feeder 3 is controlled so that dry coal is always retained in the discharge port 9 of the drying device 2. A thermocouple 10 is embedded in the discharge port 9 at such a position that the thermocouple is always buried in the dry coal. In this way, the thermocouple lO indicates a very accurate coal temperature. Further, hot air, which is a heat medium, is indirectly supplied to the drying device 2 from the hot air stove 11 via a line 4, and the drying device 2 is heated. Also,
This line is provided with a dilution gas line 13 that supplies exhaust gas that has cooled down after heating as dilution gas.
A flow control valve 14 is attached to this line. This flow rate control valve 14 is controlled by a control device 1115 using a thermocouple 10.
controlled via. By using such a flow, it becomes possible to control the optimum drying concentration of drying coal. Incidentally, in order to confirm that the rotary feeder 3 is controlled so that the thermocouple 10 is always buried in the coal, level gauges may be installed above and below the discharge port 9.

In the same manner as described above, the rotary feeder 5 is controlled so that carbonized coal always remains in the discharge port 16 of the carbonized distillation device 4. Then, a thermocouple 17 is embedded in it,
It becomes possible to control the flow rate control of the dilution line 19 to the hot air line 18 to the optimum carbonization temperature.

The cooling/adsorption device 6 also takes up a large space so that the reformed coal always stays in the discharge port 21, and the thermocouple n is always buried in the reformed coal. In this way, the temperature is detected and the result is fed back to the flow rate control valve 2 in the cooling water line to adjust the flow rate of the cooling water and control the cooling temperature to the optimum level.

FIG. 2 shows a case where a moving bed carbonization device 6 is installed in place of the rotary carbonization device shown in FIG. In this case, no special measures are required because the thermocouple is always buried within the coal seam.

By measuring the coal temperature of each coal using the method described above and controlling it by feeding it back to the heating and cooling circuit, it becomes possible to heat-treat the coal to the desired temperature.

〔Effect of the invention〕

According to the present invention, each of drying, carbonization, cooling, and adsorption
The temperature of the coal to be treated can be accurately determined in the process, and the temperature can be controlled by feeding back the results to the heating and cooling circuits, allowing stable and high-quality reforming to be achieved under optimal conditions. It has the effect of producing charcoal.

[Brief explanation of the drawing]

Figure 1 is a flow diagram showing an example of an apparatus for improving the quality of low-rank coal in which the present invention is implemented, and Figure 2 is a flow diagram in which a moving bed type carbonization apparatus is incorporated in place of the rotary type carbonization apparatus in Figure 1. It is.

Claims (1)

[Claims] 1. In an equipment for improving the quality of low-rank coal, which is composed of a connected drying section, carbonization section, and cooling/adsorption section, the temperature within the coal seam inside each of the drying equipment, carbonization equipment, and cooling/adsorption equipment is controlled. A low-grade device characterized by detecting the temperature and feeding back the detected temperature to control the temperature of the heating medium supplied to the drying device and the carbonization device, and the amount of cooling water supplied to the cooling/adsorption device. Temperature control method for charcoal quality improvement equipment.