Lignite complete cycle high-efficiency dry distillation quality improving system and method

A full cycle, dry distillation technology, applied in special forms of dry distillation, direct heating dry distillation, gas dust removal, etc., can solve the problems of large gas flow resistance and low thermal efficiency, achieve sufficient heat exchange, high thermal efficiency, and solve the effects of low thermal efficiency

Active Publication Date: 2013-02-13
BEIJING PURENERGY TECH DEV
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Problems solved by technology

[0003] In order to solve the problem of low thermal efficiency caused by large gas flow resistance existing in the existing lignite upgrading technology, the present invention further provides a lignite full cycle high-efficiency dry distillation upgrading system and method

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  • Lignite complete cycle high-efficiency dry distillation quality improving system and method

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Embodiment 1

[0040] The invention discloses a method for high-efficiency carbonization and upgrading of pulverized lignite in a full cycle. The powdered lignite is dried in a vertical drying furnace and then enters the fluidized carbonization furnace. The temperature of the hot gas fed into the bottom of the fluidized carbonization furnace is 520 ° C. In the case of isolation from the air, the lignite powder and the hot gas are flowed in contact with each other. Most of the coke powder from the dry distillation stays in the fluidized dry distillation furnace and is discharged from the overflow port. The hot gas with tar and a small amount of coke powder flows into the cyclone dust collector, and the coke powder separated by the cyclone dust collector and the coke powder output from the fluidized carbonization furnace are converged and sent to the gas-solid heat exchanger, and become coke powder products after cooling down. The gas flowing out from the outlet of the cyclone dust collector p...

Embodiment 2

[0042]The invention discloses a method for high-efficiency carbonization and upgrading of pulverized lignite in a full cycle. The powdered lignite is dried in a vertical drying furnace and then enters the fluidized carbonization furnace. The temperature of the hot gas fed into the bottom of the fluidized carbonization furnace is 550 °C. In the case of air isolation, the lignite powder and the hot gas are flowed in contact with each other. Most of the coke powder from the dry distillation stays in the fluidized dry distillation furnace and is discharged from the overflow port. The hot gas with tar and a small amount of coke powder flows into the cyclone dust collector, and the coke powder separated by the cyclone dust collector and the coke powder output from the fluidized carbonization furnace are converged and sent to the gas-solid heat exchanger, and become coke powder products after cooling down. The gas flowing out from the outlet of the cyclone dust collector passes throu...

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Abstract

The invention provides a lignite complete cycle dry distillation quality improving system and method. A bottom outlet of a vertical drying furnace of the lignite complete cycle dry distillation quality improving system is connected with a spiral charging machine, the outlet of the spiral charging machine is connected with a fluidization dry distillation furnace; the bottom of the fluidization dry distillation furnace is connected with a coal gas outlet of a hot blast heater, the top of the fluidization dry distillation furnace is connected with a cyclone dust collector; the feeding hole of the fluidization dry distillation furnace is connected with the spiral charging machine, the discharge hole of fluidization dry distillation furnace is an overflow port in the side wall at the bottom, and the fluidization dry distillation furnace is connected with a gas-solid heat exchanger by virtue of a first U-shaped seal valve; the outlet of the cyclone dust collector is connected with a spray tower, the bottom of the cyclone dust collector is connected with the gas-solid heat exchanger by virtue of a second U-shaped seal valve; the discharge hole of the spray tower is connected with the feeding hole of an electrical tar precipitator, liquid at the bottom of the spray tower and liquid at the bottom of the electrical tar precipitator are converged and then are communicated into a mechanical clarification tank; and the discharge hole at the upper part of the electrical tar precipitator is connected with the feeding hole of an intercooler, and the discharge hole of the intercooler is connected with a pressurization fan. The lignite complete cycle dry distillation quality improving method provided by the invention is a direct contact heat exchange process and has the characteristics of full heat exchange and high thermal efficiency.

Description

technical field [0001] The invention belongs to the field of coal processing and utilization, and relates to lignite quality improvement technology, in particular to a lignite full-cycle high-efficiency carbonization and quality improvement system and method. Background technique [0002] my country is rich in lignite resources, with the advantages of thick coal seam, shallow burial, low production cost, and convenient large-scale mining. The existing lignite upgrading method is generally external heat method, which has a low upgrading efficiency; on this basis, an internal heat method for lignite upgrading has emerged, but the internal heat method has a large gas flow resistance, resulting in low thermal efficiency. SUMMARY OF THE INVENTION [0003] In order to solve the problem of low thermal efficiency caused by large gas flow resistance in the existing lignite upgrading technology, the invention further provides a lignite full-cycle high-efficiency carbonization upgrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/10C10B57/00C10B49/10C10K1/02
Inventor 雷晓平夏德宏文钰郭梁赵栗王旭佳
Owner BEIJING PURENERGY TECH DEV
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