Rotary heat conduction oil boiler and tubular dryer integrated device

Abstract

The invention belongs to the technical field of electric power, chemical industry and energy, and particularly relates to a rotary heat conduction oil boiler and tubular dryer integrated device for deep drying of lignite. A processing technology of the device comprises the following steps that a rotary heat conduction oil boiler in a rotating state directly injects heat conduction oil at the hightemperature of 300 DEG C into a tube bundle in the tubular dryer through a heat conduction oil circulating pump, after the lignite in the tubular dryer is heated through the tube bundle, crystal-stateinternal water is quickly pyrolyzed, escapes from the lignite and is dehydrated and evaporated, and the dehydrated lignite falls into a collecting bin from a discharge opening to complete processing.A conventional tubular dryer can only use low-temperature steam at the temperature lower than 180 DEG C to dry the lignite because a rotary connector in use cannot seal high-pressure steam, and cannot meet the technical requirement that the internal water of the lignite can be quickly pyrolyzed and escapes only at the high temperature higher than 250 DEG C. The rotary heat conduction oil boiler is used for heating a heat transfer medium, the high-temperature heat transfer medium can be directly injected into the tube bundle of the tubular dryer without passing through the rotary connector, and the industrial problem that the crystal-state internal water of the lignite is difficult to remove is overcome.

Description

technical field [0001] The invention belongs to the technical fields of machinery, electric power and coal chemical industry, and in particular relates to a rotary heat-conducting oil boiler tube dryer integrated device for deep drying of lignite, which is used for deep dehydration and drying of lignite. Background technique [0002] my country's energy structure is dominated by coal. In the eastern coastal areas where industries are concentrated, the local high-quality coal has been basically exhausted due to long-term mining. Now it mainly relies on coal transportation from west to east to maintain economic operation. The freight accounts for more than half of the cost of coal, which increases energy consumption. and operating costs of the chemical industry. However, there are nearly 100 billion tons of high-quality lignite in the eastern part of Inner Mongolia. Because the water content is as high as 35-50%, the water absorbs a lot of heat during combustion, so the calorif...

AI Technical Summary

Problems solved by technology

This technology uses a rotary joint to inject steam into the rotating tubes. Limited by the existing processing technology, the rotary joint is difficult to seal high-pressure saturated steam, so it can only transport low-pressure, low-heat steam with a temperature lower than 180 degrees, while the crystallization water inside lignite (Inner water) can only be quickly decomposed and escaped from the inside at a high temperature above 250 degrees. Therefore, the low-temperature steam tube drying process technology cannot achieve the best quality improvement effect because the inner water cannot be effectively and deeply removed. It is mostly used for lignite upgrading in power plants, and cannot be used in industrial scenarios such as coal chemical industry and micro-coal atomization that require deep dehydration

[0008] Now, with the rapid development of coal chemical industry and 'micro-coal atomization' and other coal cleaning application new technology industries, the existing lignite dehydration and drying technology can no longer To meet the needs of the industry, the industry urgently needs lignite drying technology and new equipment that can safely, efficiently and deeply remove internal water

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