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Method for preparing olefin by utilizing coke-oven gas and calcium carbide furnace tail gas

A technology for calcium carbide furnace tail gas and coke oven gas, which is applied in the fields of hydrocarbon production from carbon oxides, climate sustainability, sustainable manufacturing/processing, etc., can solve problems such as waste of energy, environmental pollution, etc. The effect of reducing environmental pollution and increasing the added value of products

Active Publication Date: 2014-01-01
宝塔国际石化工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For a long time, coke oven gas and calcium carbide furnace tail gas have been disposed of by means of direct discharge of furnace gas or ignition of torches, which not only wastes a lot of energy, but also causes environmental pollution

Method used

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  • Method for preparing olefin by utilizing coke-oven gas and calcium carbide furnace tail gas
  • Method for preparing olefin by utilizing coke-oven gas and calcium carbide furnace tail gas
  • Method for preparing olefin by utilizing coke-oven gas and calcium carbide furnace tail gas

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Embodiment Construction

[0032] In conjunction with the accompanying drawings, the technical solution of the present invention is further described.

[0033] The purification process of coke oven gas is as follows:

[0034] (1) The crude gas 1 from the coking section is dedusted by the dust collector 1-1, and then passes through the gas-liquid separator 1-2 (about 80~85°C), where the gas, tar and ammonia water are separated, and the ammonia water enters the circulating ammonia Sink 1-4, tar 5 enters tar tank 1-3 and stores. The crude gas enters the cooler 1-5 to cool to 20-22°C, enters the electric tar collector 1-6 to trap tar droplets, and recovers it to the tar tank 1-3.

[0035] (2) The naphthalene in the raw gas is removed by an adsorption device composed of several activated carbon adsorption towers 1-7. At room temperature, the naphthalene in the raw gas is adsorbed by the activated carbon. When the adsorption reaches saturation, it can switch to regeneration operation, such as 10 At least 1~...

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Abstract

The invention relates to a method for preparing olefin by utilizing a coke-oven gas and a calcium carbide furnace tail gas. The method comprises the following process steps of mixing the purified coke-oven gas and the purified calcium carbide furnace tail gas in a molar ratio of CO / H2 of 1: (1-1.2); heating up and feeding into a reactor for carrying out catalytic reaction; and cooling a reacted gas-liquid mixture, separating out gasoline from a gasoline fractionating tower and removing CO2 by alkali wash, thereby obtaining propylene and ethylene through a C3 separating tower and a C2 separating tower in sequence. The method disclosed by the invention can be used for producing olefin by utilizing the coke-oven gas and the calcium carbide furnace tail gas at the same time, changing the waste gas into an olefin product with a high additional value, and changing waste into things of value, thereby not only realizing reutilization of waste resources, saving energy resources and reducing environmental pollution, but also increasing the product additional value and achieving great significance in improving economic benefits of enterprises.

Description

technical field [0001] The invention relates to the technical field of utilization of coal chemical tail gas, in particular to a method for preparing olefins by using coke oven gas and calcium carbide furnace tail gas. Background technique [0002] Coke oven gas and calcium carbide furnace tail gas are common tail gases in the production of coal chemical industry. [0003] Coke oven gas is a flammable gas produced when coke and tar products are produced after coal undergoes high-temperature dry distillation in a coke oven. It is a by-product of the coking industry. Generally, 300-350 m3 of coke oven gas can be produced per ton of dry coal 3 . Its main components are hydrogen (55-60%) and methane (23-27%). H in coke oven gas 2 It has a high content and is an important provider of hydrogen resources. The use of coke oven gas to produce hydrogen will be a new way for coke oven gas resource utilization in the future. [0004] Calcium carbide furnace tail gas is the tail ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/04
CPCY02P20/10
Inventor 李国明杨晓丽陈磊
Owner 宝塔国际石化工程技术有限公司
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