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Oxygen heat calcium carbide production process raw material preheating system and application method thereof

A production process, calcium carbide technology, applied in the field of raw material preheating system in the oxythermal calcium carbide production process, can solve the problems of serious energy loss, high pollution, high investment, etc., and achieve the goal of reducing carbon loss, speeding up the reaction rate, and reducing production costs Effect

Inactive Publication Date: 2018-05-18
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of calcium carbide by electrothermal method has the disadvantages of "high energy consumption, high investment, high pollution, and low production capacity". The key reason is that the reaction between bulk raw materials is mainly controlled by the heat transfer process, and the effective utilization rate of electric energy is only 40%-60%. serious energy loss
Moreover, the production of calcium carbide by the electrothermal method is restricted by electrode layout, heat distribution between electrodes, and the layout of the conductive elements of the holder. The production scale of a single furnace will not be large, and there are limitations in the occupation of large calcium carbide devices and investment.

Method used

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  • Oxygen heat calcium carbide production process raw material preheating system and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] This example uses figure 1 The system shown performs calcium carbide production, and specific methods include:

[0113] (E) In the oxythermite reactor, semi-coke and calcium oxide particles react to form calcium carbide liquid and high-temperature gas, and the high-temperature gas is sent to the limestone powder-heat medium mixer through the high-temperature tail gas outlet.

[0114] (J) The limestone is pulverized and dried by a limestone crusher to obtain limestone powder, which is stored in a limestone powder storage tank and sent to a limestone powder-heat medium mixer through a limestone powder screw conveyor. The limestone powder sent to the limestone powder-heat medium mixer is 1000Kg / h.

[0115] (A) In the limestone powder-heat medium mixer, the limestone powder obtained in step (J) is mixed with high-temperature gas to heat and decompose the limestone powder, and the decomposed products are sent to the calcium oxide separator. The decomposition temperature is...

Embodiment 2

[0128] This example uses figure 1 The system shown performs calcium carbide production, and specific methods include:

[0129] (E) In the oxythermocalcide reactor, calcium oxide and semi-coke particles react to form calcium carbide liquid and high-temperature gas, and the high-temperature gas is sent to the limestone powder-heat medium mixer.

[0130] (J) The limestone is pulverized and dried by a limestone crusher to obtain limestone powder, which is stored in a limestone powder storage tank and sent to a limestone powder-heat medium mixer through a limestone powder screw conveyor. The limestone powder sent to the limestone powder-heat medium mixer is 1000Kg / h.

[0131] (A) In the limestone powder-heat medium mixer, mix limestone powder and high-temperature gas to heat and decompose the limestone powder, and send the decomposition products to the calcium oxide separator. The decomposition temperature is 1200°C. The gas-solid ratio of limestone powder to high-temperature ga...

Embodiment 3

[0143] This example uses figure 1 The system shown performs calcium carbide production, and specific methods include:

[0144] (E) In the oxythermocalcide reactor, calcium oxide and semi-coke particles react to form calcium carbide liquid and high-temperature gas, and the high-temperature gas is sent to the limestone powder-heat medium mixer.

[0145] (J) The limestone is pulverized and dried by a limestone crusher to obtain limestone powder, which is stored in a limestone powder storage tank and sent to a limestone powder-heat medium mixer through a limestone powder screw conveyor. The limestone powder sent to the limestone powder-heat medium mixer is 1000Kg / h.

[0146] (A) In the limestone powder-heat medium mixer, mix limestone powder and high-temperature gas to heat and decompose the limestone powder, and send the decomposition products to the calcium oxide separator. The decomposition temperature is 1200°C. The gas-solid ratio of limestone powder to high temperature ga...

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Abstract

The invention relates to an oxygen heat calcium carbide production process raw material preheating system and an application method thereof. The system comprises limestone powder decomposition subsystem, a pulverized coal pyrolysis subsystem and an oxygen heat calcium carbide reactor. The limestone powder decomposition subsystem comprises a limestone powder-heat medium mixer and a calcium oxide separator which are connected, the pulverized coal pyrolysis subsystem comprises a pulverized coal conveyor, a pulverized coal circulation collector, a semi-coke primary separator, a semi-coke conveyor,a semi-coke circulation collector and a semi-coke secondary separator which are sequentially connected, the oxygen heat calcium carbide reactor is connected with the limestone powder-heat medium mixer, the calcium oxide separator is connected with the oxygen heat calcium carbide reactor and the semi-coke conveyor, and the semi-coke secondary separator is connected with the oxygen heat calcium carbide reactor. The system is suitable for various reactors for oxygen heat calcium carbide production, pulverized coal and calcium carbonate powder can directly serve as raw materials, investment of acoal pyrolysis furnace and a calcium carbonate decomposition furnace is reduced, and gas-solid heat exchange time can be flexibly adjusted.

Description

technical field [0001] The present invention generally relates to the field of calcium carbide production in traditional coal chemical industry, and specifically relates to a raw material preheating system in the calcium carbide production process by oxythermal method and an application method thereof. Background technique [0002] Calcium carbide production is based on the reaction of carbon-containing raw materials (coal, coke, semi-coke, etc.) and calcium-containing raw materials (calcium oxide, calcium hydroxide, calcium carbonate, etc.) 2 ). According to different heating methods, calcium carbide production methods are generally divided into two types: electrothermal method and oxygen thermal method. [0003] The electrothermal method has a history of hundreds of years. The traditional electrothermal calcium carbide production process is to use the heat energy generated by the arc to make the carbon raw material and lime react at a temperature of about 2000-2200 ℃ to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/942
CPCY02P20/129
Inventor 巩志坚温雨鑫陈峨远忠森喻善均丁力吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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