Method for producing coal tar and synthesis gas from oil-rich coal using pyrolysis gasification coupling device and oil gas purification device

Abstract

The invention discloses a method for producing coal tar and synthetic gas from oil-rich coal using a pyrolysis gasification coupling device and an oil gas purification device. The oil-rich coal is used as a raw material, and the pyrolysis gas and crude oil are firstly obtained through the pyrolysis gasification coupling device. Syngas, to realize the separate collection of two gases in the same device. Then, in view of the problems of difficult oil and gas separation, low recovery rate of coal tar, and large amount of waste water, an oil and gas purification device was set up to recover coal tar through dust removal and heat recovery, oil and gas separation, oil-solid separation, and low-temperature oil and gas separation to obtain coal Tar products, improve the recovery rate of coal tar, and reduce the waste water discharge in the separation process. At the same time, the synthesis gas is further purified through conversion, low-temperature methanol washing and other units to obtain synthesis gas products.

Description

technical field [0001] The invention belongs to a method for simultaneously preparing coal tar and synthesis gas, in particular to a method for producing coal tar and synthesis gas from oil-rich coal using a pyrolysis gasification coupling device and an oil gas purification device. Background technique [0002] At present, fixed bed gasification technology is widely used in the production of coal tar and synthesis gas, which has the advantages of wide selection of coal types, high gasification rate, and low oxygen consumption. However, since the synthesis gas and coal tar gas produced by this technology are directly mixed and sent out from the gasification unit, the subsequent separation and purification treatment becomes more difficult. Moreover, since the synthesis gas contains a large amount of tar and phenolic ammonia components, the effective gas content in the synthesis gas is reduced, and at the same time, it is difficult to separate oil and gas, the recovery rate of ...

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Problems solved by technology

However, since the synthesis gas and coal tar gas produced by this technology are directly mixed and sent out from the gasification unit, it makes the subsequent separation and purification treatment more difficult

And because the synthesis gas contains a large amount of tar and phenolic ammonia components, the effective gas content in the synthesis gas is reduced, and at the same time, it is difficult to separate oil and gas, the recovery rate of tar is low, and a large amount of waste water will be generated during the separation process.

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