System used for preparing light aromatic hydrocarbon from pulverized coal and having wastewater reuse function and method

A technology for aromatics and sewage, which is applied in the field of producing light aromatics and can solve problems such as increasing demand for aromatics

Pending Publication Date: 2017-09-19
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is mainly to solve the problems of clean and efficient utilization of medium and low-rank pulverized coal and increasing demand for aromatics, and to provide a system and method for producing acetylene and hydrogen from low-rank coal and quicklime, and then producing light aromatics from acetylene.

Method used

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  • System used for preparing light aromatic hydrocarbon from pulverized coal and having wastewater reuse function and method
  • System used for preparing light aromatic hydrocarbon from pulverized coal and having wastewater reuse function and method

Examples

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Embodiment 1

[0149] Screen the pulverized coal with a particle size of less than 3mm, send the pulverized coal to the top of the fast pyrolysis device 1 through the conveyor belt, enter the fast pyrolysis device 1 for pyrolysis, the pyrolysis temperature is 800°C, and the pyrolysis time is 2s to generate semi-coke, gas and coal tar. Mix quicklime and semi-coke at a mass ratio of 3:2, add an appropriate amount of binder, and press balls to control the diameter of the pellets to 10-40mm. The ball is sent into calcium carbide furnace 6 to produce calcium carbide. The calcium carbide produced is cooled and pulverized, the particle size of the calcium carbide is controlled between 50-80mm, and it enters the acetylene generator 7 to react to obtain acetylene.

[0150]In the reactor for preparing aromatics from acetylene in this embodiment, the stainless steel reaction sleeve used is a reaction sleeve lined with ceramics, and the inner diameter of the reaction sleeve: the length of the reaction ...

Embodiment 2

[0153] Screen the pulverized coal with a particle size of less than 3mm, send the pulverized coal to the top of the fast pyrolysis device 1 through the conveyor belt, enter the fast pyrolysis device 1 for pyrolysis, the pyrolysis temperature is 500°C, and the pyrolysis time is 30s to generate semi-coke, gas and coal tar. Mix quicklime and semi-coke at a mass ratio of 2:1, add an appropriate amount of binder, and press balls to control the diameter of the pellets to 10-40mm. The ball is sent into calcium carbide furnace 6 to produce calcium carbide. The calcium carbide produced is cooled and pulverized, the particle size of the calcium carbide is controlled between 50-80mm, and it enters the acetylene generator 7 to react to obtain acetylene.

[0154] In the reactor for preparing aromatics from acetylene in this embodiment, the stainless steel reaction sleeve used is a reaction sleeve lined with ceramics, and the inner diameter of the reaction sleeve: the length of the reactio...

Embodiment 3

[0157] Screen the pulverized coal with a particle size of less than 3mm, and send the pulverized coal to the top of the fast pyrolysis device 1 through the conveyor belt, and then enter the fast pyrolysis device 1 for pyrolysis. The pyrolysis temperature is 700°C, and the pyrolysis time is 15s. gas and coal tar. Mix quicklime and semi-coke at a mass ratio of 1:1, add an appropriate amount of binder, and press balls to control the diameter of the pellets to 10-40mm. The ball is sent into calcium carbide furnace 6 to produce calcium carbide. The calcium carbide produced is cooled and pulverized, the particle size of the calcium carbide is controlled between 50-80mm, and it enters the acetylene generator 7 to react to obtain acetylene.

[0158] In the reactor for preparing aromatics from acetylene in this embodiment, the stainless steel reaction sleeve used is a reaction sleeve lined with ceramics, and the inner diameter of the reaction sleeve: the length of the reaction sleeve:...

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Abstract

The invention discloses a system for preparing aromatics from pulverized coal with the function of sewage reuse, which is characterized in that it includes a fast pyrolysis device, an oil-gas separation device, a purification device, a desulfurization and denitrification device, a mixing tank, a pressure ball device, Calcium carbide furnace, acetylene generator, acetylene to aromatics reactor and separation system. The invention also discloses a method for preparing light aromatics from pulverized coal. Using the above system and method, aromatics are produced from coal, which solves the problem of limited aromatics production due to limited petroleum resources, and realizes the cleanliness of low-rank coal. Efficient use of.

Description

technical field [0001] The present invention relates to a combined process for preparing light aromatics from medium and low rank pulverized coal, more specifically, it relates to a kind of medium and low rank pulverized coal which passes through a fast pyrolysis device and is mixed with quicklime to produce calcium carbide, which is used to produce acetylene, and then Systems and methods for producing light aromatics from acetylene. Background technique [0002] my country's energy structure has always been rich in coal, poor in oil, and low in gas, and its coal reserves can reach 17% of the world's coal reserves. Among them, lignite, long-flame coal and other low-rank coal resources are abundant, accounting for more than 50% of my country's coal reserves and coal production. However, due to the high water content of low-rank coal, direct combustion or gasification efficiency is low, and existing technologies cannot make full use of their resources. value, resulting in a hu...

Claims

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Application Information

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IPC IPC(8): C07C2/48C07C15/04C02F1/58C10H21/00C02F103/34
CPCC07C2/48C02F1/58C02F2103/34C10H21/00
Inventor 吴道洪许梅梅闫琛洋于家琳史雪君
Owner BEIJING HUAFU ENG
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