Multifunctional low-temperature upgrading furnace with hydrogen-source stable decomposition

Abstract

A multifunctional low-temperature upgrading furnace with hydrogen-source stable decomposition comprises a material distributing trough arranged above a furnace body, the material distributing trough is communicated with the inside of the furnace body, a dust-removing flow guide device is arranged at the top of the furnace body and is capable of discharging gas generated in the furnace, a plurality of disturbing devices for loosening falling coal are arranged in an inner chamber of the furnace body, a hydrogenating device and a thermal decomposition device are arranged sequentially below the disturbing devices, a solid product produced by the thermal decomposition device is conveyed to a solid discharging device through a first cooling device, and the solid product is cooled by a second cooling device before discharging. A first material-distributing heat distributor is of hollow cylinder structure, an end face of the cylinder structure is provided with a gas inlet, a face of the cylinder structure facing the foaling coal from the dust-removing flow guide device is a first distributing face, and another face of the cylinder structure opposite to the former face is a first heat distributing face. The multifunctional low-temperature upgrading furnace with hydrogen-source stable decomposition has the advantages that chips produced by thermal decomposition of coal can be decomposed in time stably by a hydrogen source, tar yield is increased, and quality of the solid product is improved.

Description

technical field [0001] The invention relates to the field of coal deep processing and utilization, in particular to a hydrogen source stable decomposition composite function low-temperature upgrading furnace. Background technique [0002] The pyrolysis of coal refers to the complex process of a series of physical changes and chemical reactions that occur when coal is continuously heated to a higher temperature under the condition of being isolated from air or an inert atmosphere. Coal pyrolysis is an extremely important intermediate process in coal processing and transformation, such as combustion, gasification, liquefaction and other processes. Coal pyrolysis can produce gas, tar and semi-coke. Compared with the gasification or liquefaction process, the process of coal pyrolysis is simple, the processing conditions are mild, the investment is small, and the production cost is low. [0003] According to the conditions and methods of pyrolysis, coal pyrolysis can be classif...

AI Technical Summary

Problems solved by technology

The calorific value of the gas in the external combustion internal heating type carbonization furnace is high, and the quality of the solid product is good, but the tar yield is also about 6%, and the tar yield is not high

As described in the patent CN202730059U, the combustible gas is mainly burned in the combustion chamber of the vertical furnace to obtain hot carrier gas entering the carbonization chamber to heat and upgrade the coal. However, if the coal particles are small, the distribution plate in the carbonization chamber will not work. , because the coal seam is thicker, the air permeability is poor, the uneven heating leads to the occurrence of intermingling, and the yield of mixed hydrocarbon products is low, so this upgrading furnace is only suitable for heating and upgrading of lump coal

In view of the low pyrolysis tar yield of the current internal combustion and internal heating and external heating and internal heating upgrading furnaces, and especially in the pyrolysis process of pulverized coal, there is a lot of dust in the tar, which seriously affects the quality of the tar

At present, the internal heating vertical furnace designed with the combination of internal combustion and external combustion has not yet combined hydropyrolysis technology, which seriously restricts the utilization rate of coal quality improvement and affects the utilization value of coal.

Images