Self-dedusting type system for producing synthetic gas through pyrolysis and cracking of coal

Abstract

The invention relates to the technical field of gas production through pyrolysis and cracking of coal, in particular to a self-dedusting type system for producing a synthetic gas through pyrolysis and cracking of coal based on heating of a regenerative radiant tube. The system comprises a pyrolysis hopper, a first feeding device, a pyrolysis and cracking reactor, a spray tower, a transform furnace and a fuel gas tank, wherein the pyrolysis and cracking reactor comprises a feeding port, a pyrolysis chamber, a cracked gas outlet, the regenerative radiant tube, a heat insulating brick wall, a communicating member and a granular bed dedusting device. The self-dedusting type system for producing the synthetic gas provided by the invention is simple in structure, convenient to operate, uniform in temperature distribution and excellent in heating effect; the reactor comprises the pyrolysis chamber and a cracking chamber; the granular bed dedusting device is arranged at an oil gas outlet of the pyrolysis chamber; after an oil gas produced by the pyrolysis chamber is dedusted by a granular bed, the clean oil gas enters the cracking chamber and is subjected to deep cracking, so as to reduce the dedusting pressure of a rear end, avoid a problem that a pyrolysis oil contains dust, and truly realize the clean and efficient utilization of fossil fuels.

Description

technical field [0001] The invention belongs to the technical field of coal pyrolysis and cracking to produce gas, and specifically relates to a system for producing synthetic gas by heating self-cleaning dust-type granular coal pyrolysis and cracking based on a regenerative radiation tube. Background technique [0002] my country is rich in coal resources, and most of the raw coal is used for direct combustion except for coking and conversion processing. The direct combustion of coal leads to the fact that the oil and gas resources rich in coal have not been fully refined and utilized, and the thermal efficiency of direct combustion is low, which seriously damages the environment. The pyrolysis of coal is to heat coal under an inert atmosphere to produce semi-coke, gas and tar, etc. These products can be used in stages, fully extracting oil and gas resources, and improving the comprehensive utilization efficiency of coal . Coal pyrolysis process can be divided into two ty...

AI Technical Summary

Problems solved by technology

The thermal efficiency of the external heat type is low, and the secondary decomposition of volatile products is serious; the internal heat type process overcomes the shortcomings of the external heat type, and transfers heat to the coal by means of heat carriers (solid heat carrier and gas heat carrier)

The gas heat carrier process has the disadvantages of distilled dry distillation gas, large condensation recovery system, low calorific value of gas, and difficulty in further comprehensive utilization

The solid heat carrier process has certain advantages relatively speaking, but there are many disadvantages such as complex process operation links and high manufacturing costs.

The main purpose of the existing pyrolysis furnaces is to produce oil products, but most of the pyrolysis furnaces, especially those that use pulverized coal as raw materials, contain a lot of dust in the pyrolysis oil, which makes it difficult to effectively process the pyrolysis oil. Utilization, the value of pyrolysis oil is not high, etc.

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