Fischer-Tropsch synthesis method for wax by utilizing low-rank coal

A Fischer-Tropsch synthesis and rank coal cost technology, applied in the field of using low-rank coal Fischer-Tropsch synthetic wax, can solve problems such as insufficient water recovery, environmental pollution, etc., and achieve considerable commercial benefits, low equipment requirements, and low energy consumption.

CN109762604APending Publication Date: 2019-05-17浙江天禄环境科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-05-17

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Abstract

The invention provides a Fischer-Tropsch synthesis method for wax by utilizing low-rank coal. The Fischer-Tropsch synthesis method comprises the following steps: drying the low-rank coal to obtain dried low-rank coal and waste gas; removing dust from the waste gas to obtain coal powder; gasifying and reducing the dried low-rank coal under an oxygen-free or micro-aerobic condition to obtain an oil-gas mixture and quality-improved coal; preparing the oil-gas mixture into mixed gas and wastewater; reforming and transforming the mixed gas to prepare synthetic gas; preparing coal water slurry through the wastewater, the coal powder and a coal water slurry additive and then preparing synthetic gas; preparing synthetic gas by utilizing the quality-improved coal; after mixing the three types of synthetic gas, removing CO2 and supplementing H2 or CO to adjust a hydrogen-carbon ratio of the synthetic gas to be 1.5 to 2.2; carrying out distillate oil steam stripping and the like on a product, which is obtained by carrying out Fischer-Tropsch synthesis reaction on the synthetic gas, to obtain wax, heavy oil and naphtha. According to the Fischer-Tropsch synthesis method provided by the invention, the low-rank coal is used for producing light oil, the heavy oil and the wax through a Fischer-Tropsch synthesis technology and is convenient to transport, and the utilization rate of resources isimproved; the source of raw materials is wide, the energy consumption of the technology is low, wastes are utilized and the production cost is easy to save.
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Description

technical field

[0001] The invention relates to the technical field of clean utilization of coal substances, in particular to a method for synthesizing wax by using low-rank coal Fischer-Tropsch. Background technique

[0002] my country is a country rich in coal, poor in oil, and low in gas. Coal consumption accounts for more than 60% of primary energy consumption, which determines that it will be difficult to change the coal-based energy structure for a long period of time. Judging from the proven quality of coal mines, the proportion of middle and low-rank coal in my country is very large, so it is particularly important to use middle and low-rank coal reasonably and efficiently to produce high-quality chemical products.

[0003] At present, the methods and means of utilizing coal resources in our country are relatively simple, and they are simply burned to obtain the combustion chemical energy. This simple utilization method is not only a huge waste of energy resources, b...

Examples

Embodiment Construction

[0045] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

[0046] In the present invention, unless otherwise specified, the raw materials and equipment used can be purchased from the market or commonly used in this field. The methods in the following examples, unless otherwise specified, are conventional methods in the art.

[0047] Such as figure 1 As shown, the present invention discloses a method for utilizing low-rank coal Fischer-Tropsch to synthesize wax, which comprises the following process steps;

[0048](1) The low-rank coal is processed by a drying process to obtain dried low-rank coal and waste gas, and the waste gas is obtained through the first dedusting process to obtain pulv...