System for producing calcium carbide

A production system, calcium carbide technology, applied in the direction of carbide, energy input, calcium carbide, etc., can solve the problems of high energy consumption, high investment, high pollution and so on

Inactive Publication Date: 2009-05-13
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problem of "high investment, high energy consumption, and high pollution" in calcium carbide production. Through a lot

Method used

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  • System for producing calcium carbide
  • System for producing calcium carbide

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Embodiment Construction

[0022] Method 1: If figure 1 As shown, the powdery carbon-containing raw material and powdery calcium-containing raw material are mixed in the solid raw material mixer, and then sent to the fluidized bed preheater through the screw feeder; The compression device is sent to the gas inlet at the bottom of the preheater; part of the carbon-containing raw material and the gas after heat exchange in the waste heat boiler are burned in the preheater under the action of oxygen-containing gas, and the raw material is heated to 700-1000°C to make the carbon-containing The raw material is pyrolyzed into coke powder, and the calcium-containing raw material is pyrolyzed into calcium oxide powder. The generated high-temperature gas is discharged through the tube-bundle heat exchanger after heat exchange, and the formed high-temperature solid mixture is sent to the raw material nozzle of the reactor through the U-shaped pneumatic valve feeder, and is sprayed into the reactor through the cen...

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Abstract

A calcium carbide production system belongs to the field of calcium carbide production. The calcium carbide production system includes a raw material preheating unit and a reaction unit; the raw material preheating unit includes a raw material mixing and feeding device, a preheating device, a gas compression device and a heat exchanger; the raw material mixing and feeding device includes a solid raw material mixer and a feeder; a raw material inlet, a gas inlet, a gas outlet and a solid material outlet are formed on the preheating device; the raw material mixing and feeding device is communicated with the preheating device; the reaction unit includes a feeding device, a reactor and a heat exchanger; a raw material nozzle, a gas outlet and a product outlet are arranged on the reactor; the solid material inlet of the feeding device is communicated with the preheating device; the solid material outlet of the feeding device is communicated with the raw material nozzle on the reactor; the reactor is communicated with the heat exchanger; and the heat exchanger is connected with the gas compression device of the preheating unit. The system realizes the coupling of the process of coal coking and lime calcining and the production of calcium carbide; the capacity usage ratio is high; the powdery material is adopted; the selection range of the raw material is wide; the production capacity is large; and the furnace type is simple.

Description

Technical field: [0001] The invention relates to a calcium carbide production system, in particular to a system for producing calcium carbide from solid carbon-containing raw materials and calcium-containing raw materials through a two-stage process. Background technique: [0002] Calcium carbide, commonly known as calcium carbide (CaC 2 ), known as the mother of organic synthesis before the middle of last century. At present, it is mainly used to produce series products such as vinyl chloride, vinyl acetate and acrylic acid. For example, about 70% of PVC (polyvinyl chloride) production in China comes from calcium carbide acetylene. In recent years, the high price of oil has stimulated the development of calcium carbide industry. The output of calcium carbide in my country increased from 4.25 million tons in 2002 to 11.77 million tons in 2006. [0003] The traditional calcium carbide production adopts the fixed bed-arc method, using the high temperature generated by the ar...

Claims

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Application Information

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IPC IPC(8): C01B31/32C01B32/942
CPCY02P20/129
Inventor 刘振宇刘清雅李国栋
Owner BEIJING UNIV OF CHEM TECH
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