Reformed coal production equipment, and method for controlling same

Abstract

The purpose of the present invention is to provide reformed coal production equipment whereby it is possible to efficiently remove tar without lowering the production amount of reformed coal even when the equipment is stopped. Reformed coal production equipment provided with: a combustion furnace (124) for generating heated gas; a dry distillation gas supply pipe (101) for supplying dry distillation gas (14) that was generated at the inner cylinder (122) of a dry distillation device (121) to the combustion furnace; a vapor generator (125) to which a portion of the heated gas (11) generated at the combustion furnace is supplied and which generates waste heat gas (13) by subjecting the heated gas to heat exchange; and a discharge pipe (52), a waste heat gas delivery pipe (53), a mixed gas delivery pipe (55), a blower (126), a mixed gas supply pipe (56), a mixed gas branching pipe (102), a flow rate adjustment valve (103), and a mixed gas allocation pipe (105) which supply and allocate, to the aforementioned inner cylinder, the waste heat gas and low-temperature heated gas (12) generated by indirectly heating dried coal (2) by means of the heated gas within the outer cylinder (123) of the dry distillation device.

Description

technical field [0001] The present invention relates to modified coal manufacturing equipment and a control method thereof, and is particularly useful when applied to modifying low-grade coal (low-grade coal) such as lignite and sub-bituminous coal, which is porous and has a high moisture content. Background technique [0002] Porous and high-moisture low-grade coal (low-grade coal) such as lignite and sub-bituminous coal has a low calorific value per unit weight, so it is dried by heat treatment to increase the calorific value per unit weight. [0003] As a reformed coal manufacturing facility for reforming such low-grade coal, there is, for example, a device that includes an indirect heating system carbonization device that indirectly heats low-grade coal with heating gas to dry-distill it, and converts the The pyrolysis gas generated in the pyrolysis device is supplied through the pyrolysis gas supply pipe, and the pyrolysis gas and the like are combusted to generate the ...

AI Technical Summary

Problems solved by technology

[0011] However, if the decoking method described in the above-mentioned Patent Document 1 is applied to the above-mentioned upgraded coal production facility, although the oxygen concentration-adjusted gas whose oxygen concentration is adjusted is directly supplied to the carbonization device, it is possible to stop However, if an attempt is made to produce the oxygen concentration-adjusting gas from air or an inert gas (nitrogen or water vapor), a device for this purpose is required, which will cause Increased production cost of modified coal due to this device

In addition, in order to react with the tar, the temperature of the oxygen concentration-adjusting gas must be raised in advance, and additional energy is required.

In other words, tar cannot be removed efficiently

[0012] Since in the thermal decomposition method of the processed product by means of an external heating furnace described in the above-mentioned Patent Document 2, the carbide of the organic matter of the processed product generated due to thermal decomposition burns itself, if this method is applied to the modification In a coal production facility, even when the facility is stopped, it is necessary to supply coal to the carbonization device and to burn the coal itself, resulting in a decrease in the production amount of modified coal.

Images