Rapid briquette coal drying system and briquette coal drying furnace

Abstract

The invention relates to a rapid briquette coal drying system and a briquette coal drying furnace.The drying system and a hot oil system are included.The hot oil system comprises an oil inflow pipe, an oil return pipe and a heat dissipation system located in a drying cavity.The heat dissipation system comprises an oil distributing pipe communicated with the oil inflow pipe, and an oil collecting pipe communicated with the oil return pipe.The oil distributing pipe and the oil collecting pipe are communicated with multiple sets of heat dissipation coil pipes through oil guide pipes respectively.The heat dissipation coil pipes are arranged on the lower portions of briquette coal chain plate conveying device grid plates and located on the upper portions of branch air pipes.A hot air source directly conveys hot air to the bottom of briquette coal through an air distributing device via pipelines, dry air is fully utilized, it is guaranteed that the briquette coal directly makes contact with the dry hot air flow, briquettes enter the drying cavity to make contact with the dry high-temperature airflow all the time, the drying speed is increased, drying efficiency is improved, and the hot air from an air outlet of an induced draft fan is guided by the air distributing pipe, conveyed by the branch air pipes layer by layer and dispersed to the position below each briquette coal layer of the drying furnace.

Description

technical field [0001] The invention belongs to the field of drying equipment, and relates to a quick drying system for molded coal and a molded coal drying furnace. Background technique [0002] At present, coal is still used as the main fuel in many places, but direct combustion of ordinary lump coal is prone to smoke and produces a lot of pollutants. Therefore, the country vigorously promotes the use of briquette coal, and uses industrialized methods to process raw coal to reduce the generation of harmful gases. Grinding anthracite coal for desulfurization and adding an appropriate amount of catalyst to make environmentally friendly briquettes is an effective measure to use as fuel, which can reduce the excitation calorific value, solidify polluted gases and ash powder, and cause little environmental pollution. The removal of moisture in briquette molding is the key to provide industrialized production steps, and the high efficiency, high output and energy saving of dryin...

AI Technical Summary

Problems solved by technology

[0003] Most of the current horizontal dryers are relatively simple to preheat, such as Chinese patent, patent application number 2015100778243, the patent application name is a horizontal briquette dryer, which is a waste heat utilization method with bottom air intake, but the effect is limited. The main reason is that the hot air enters at a lower temperature and the effect disappears after a certain distance, and the effect of preheating is limited.

As the air flow rises, the humidity of the air increases, which is not conducive to the surface drying of the top layer of briquettes, prolongs the drying time of the briquettes, and reduces production efficiency.

[0004] The heat dissipation of the circulating oil circuit is mentioned, but there are problems in this structure. The flow of each branch of the oil circuit is unbalanced, and the flow direction of the hot oil cannot be diverted according to the temperature requirements in the drying box. Although the oil circuit is straight through and is not easy to scale, there are still some dead ends. fouling phenomenon

When checking and repairing the drying chamber, the oil temperature drops slowly, resulting in a long cooling time before repairing, and sometimes the oil temperature continues to rise and the furnace temperature exceeds the upper limit without a timely and constant control function

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