Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and system used for preparing acetylene from coal-based calcium carbide

A technology of calcium carbide and acetylene, applied in the field of coal chemical industry, can solve problems such as pollution, environmental pollution, and high energy consumption

Pending Publication Date: 2018-04-20
SHANXI LUAN MINING GRP +1
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's industrial calcium carbide production technology adopts the arc heating method, and the calcium carbide produced is a liquid molten phase. For liquid calcium carbide, it needs to go through procedures such as calcium carbide pot cooling, demoulding, and crushing. The process is complex and the dust pollution is serious.
In addition, the generated calcium carbide contains many impurities. The generated calcium carbide undergoes a phase inversion process of high-temperature melting, and the material structure is relatively compact. The calcium carbide needs to be crushed before it can enter the acetylene synthesis process. This not only causes serious dust pollution, but also during this process. When calcium carbide is exposed to the air, it is easy to generate acetylene, which not only causes environmental pollution, but also easily causes explosion hazards.
In short, the industrial coal-based calcium carbide acetylene method has problems such as long process flow, high energy consumption, and serious pollution.
The production of acetylene from coal powder through calcium carbide poses a challenge to the traditional complex process route of coal-coking-calcium carbide-acetylene

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system used for preparing acetylene from coal-based calcium carbide
  • Method and system used for preparing acetylene from coal-based calcium carbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] see figure 2 . Metallurgical coke and quicklime are mixed according to the carbon-calcium molar ratio of 2.8:1, and then passed through a pulverizer (1) and ground into a mixed ultrafine powder with a particle size distribution between 30-80nm. The industrial analysis of metallurgical coke is shown in Table 1. The fixed carbon content is 84.73%, and the calcium oxide content in quicklime is greater than 99%. The mixed superfine powder is fed into the tablet press (2) through the feeding port (10), and the pressure is 6 MPa to press the tablet to obtain a cylindrical block material with a diameter of 40 mm and a height of 10-15 mm. The material is placed in the self-developed microwave smelting calcium carbide furnace (3) through the material inlet (11), and argon gas is passed into the microwave smelting calcium carbide furnace (3) through the gas inlet (13) to perform atmosphere replacement. Then microwave heating in an argon atmosphere to raise the temperature to 1...

Embodiment 2

[0052] The metallurgical coke and the calcite are respectively pulverized into superfine metallurgical coke powder and calcite superfine powder with a particle size of 80-120nm through secondary crushing. The industrial analysis of metallurgical coke is shown in Table 1, and the content of calcium carbonate in calcite is greater than 97%. The above-mentioned superfine powder of metallurgical coke and calcite is mixed according to the ratio of carbon to calcium molar ratio of 4.5:1, and the mass fraction rate is 3% diesel oil, and then sent to the double-roll tablet machine, and the pressure is 6.5MPa. Form a cylindrical granular material with a diameter of 5mm and a height of 10mm. The material was placed in a self-developed microwave smelting calcium carbide furnace, and the atmosphere was first replaced with argon. Then microwave heating in an argon atmosphere to 1680°C and maintain for 1h. The tail gas generated during the reaction enters the exhaust pipe and passes throug...

Embodiment 3

[0054] The anthracite and quicklime are pulverized into anthracite superfine powder and quicklime superfine powder with a particle size of 100-150nm through secondary crushing. The industrial analysis of anthracite is shown in Table 2, and the content of calcium oxide in quicklime is greater than 99%. The above-mentioned ultrafine powder of anthracite and quicklime is uniformly mixed according to the ratio of carbon to calcium molar ratio of 3:1, and then sent into a tablet press, and a spherical material with a diameter of 5mm is prepared under a pressure of 6.5MPa. The materials were placed in a self-developed microwave smelting calcium carbide furnace, and the atmosphere was first replaced with argon. Then microwave heating in an argon atmosphere to 1800°C and maintain a constant temperature for 1 hour. The tail gas generated during the reaction enters the exhaust pipe and passes through the separation device to obtain a gas product with high CO content. The CO content is 9...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Heightaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method and a system used for preparing acetylene from coal-based calcium carbide. The method comprises following steps: raw materials are mixed fully at a certain ratio, andare subjected to ultrafine grinding so as to obtain an ultrafine powder; the ultrafine powder is subjected to moulding treatment, and microwave heating smelting so as to obtain solid state calcium carbide; the obtained solid state calcium carbide is reacted with water, and acetylene gas is obtained via contact hydrolysis of calcium carbide with water.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry. More specifically, it relates to a method and system for producing acetylene from coal-based calcium carbide and simultaneously co-producing carbon monoxide. Background technique [0002] my country's energy structure has the characteristics of rich coal, poor oil and little gas, and vigorously developing coal chemical industry is an important technical measure of my country's sustainable development policy. The production of acetylene from coal-based calcium carbide is an important part of my country's coal chemical industry, providing acetylene raw materials for the organic chemical industry. The traditional coal-based calcium carbide production of acetylene is to reproduce acetylene by synthesizing calcium carbide from coal. At present, my country's industrial calcium carbide production technology adopts the arc heating method, and the calcium carbide produced is in a liquid m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10H19/00C10H21/00C10H21/10C01B32/40
CPCC10H19/00C10H21/00C10H21/10
Inventor 姜标赵虹刘思源黄伟光齐会杰
Owner SHANXI LUAN MINING GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com