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Technique for producing calcium carbide and cogeneration by two-stage method and device thereof

A technology of combined heat and power, two-stage method, applied in the chemical industry, sustainable manufacturing/processing, carbide, etc., to achieve the effects of low production cost, reduced power consumption, and low reaction energy consumption

Inactive Publication Date: 2010-09-15
山西亿众公用事业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the process and equipment for the production of calcium carbide and cogeneration of heat and power by the two-stage method

Method used

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  • Technique for producing calcium carbide and cogeneration by two-stage method and device thereof
  • Technique for producing calcium carbide and cogeneration by two-stage method and device thereof
  • Technique for producing calcium carbide and cogeneration by two-stage method and device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The device for producing calcium carbide by the two-stage method is composed of an upper shaft furnace and a lower electric arc furnace. The shaft furnace is a cylindrical structure with an external insulation layer 9. The top is a cold material inlet 8. The gas inlet 10 of the hot mixing furnace has a spiral unloader 6 connected to the electric arc furnace at the bottom; the lower section of the electric arc furnace consists of a furnace shell 15, a furnace wall 14, a manhole 2, a furnace cover 5, an electrode 11, an electrode sealing ring 12, and an oxygen nozzle 16. Composed of pulverized coal nozzle 3, furnace hearth 1, calcium carbide liquid outlet 17, hot material inlet 5 and hot mixing furnace gas outlet 13, the upper end of furnace shell 15 is furnace cover 4, and the bottom of furnace shell 15 is furnace hearth 1, The inner side of the furnace shell 15 is the furnace wall 14, which is located above the furnace hearth 1. The left furnace wall 14 has a manhole 2, ...

Embodiment 2

[0043] The aspect ratio of the shaft furnace is 4. There are three oxygen nozzles 16 and pulverized coal nozzles 3 respectively. , after the above-mentioned coke and quicklime are mixed according to the weight ratio-coke (including the injection amount): quicklime=1.46:1, after crushing and screening, the raw materials with a particle size of 8-50mm are continuously sent into the vertical tank at a flow rate of 185kg / h In the furnace, the discharge temperature of the shaft furnace in the upper section is controlled at 900-1200°C, and the temperature of the calcium carbide liquid in the lower section of the electric arc furnace is controlled at 1900-2100°C. One calcium carbide liquid, with a displacement of about 170kg each time, is cooled to room temperature, the calcium carbide content is 80.6%, and the gas generation volume is 300L / kg. All the other are with embodiment 1.

[0044] The main consumption indicators are:

[0045] (1) 1.48t coke / t calcium carbide; (2) 0.9t lim...

Embodiment 3

[0048] The aspect ratio of the shaft furnace is 8. There are nine oxygen nozzles 16 and pulverized coal nozzles 3 respectively. After mixing the above-mentioned anthracite and limestone according to the weight ratio—anthracite:limestone=1.42:1, after crushing and screening, the raw materials with a particle size of 8-50mm are continuously sent into the shaft furnace at a flow rate of 320kg / h, and the upper shaft grate The temperature of the material is controlled at 900-1200°C, the temperature of the calcium carbide liquid in the lower section of the electric arc furnace is controlled at 1900-2100°C, the injection coal powder is continuously injected into the shaft furnace at an injection rate of 20kg / h, and the calcium carbide liquid is discharged every two hours. The amount is about 170kg, it is cooled to normal temperature, the content of calcium carbide is 80.6%, and the gas generation is 300L / kg. All the other are with embodiment 1.

[0049] The main consumption indicat...

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Abstract

The invention relates to a technique for producing calcium carbide and cogeneration by a two-stage method and a device thereof. The technique comprises the following steps: after being preheated at a shaft furnace at the upper section, massive carbonous raw material and massive calcic raw material enter an arc furnace at the lower section; while blowing oxygen and coal powder and supplying heat by the electrode in the arc furnace, the raw materials react to produce calcium carbide; and the produced calcium carbide furnace gas is dedusted and combusted by a gas turbine so as to drive the generator to generate power, and sensible heat of exhaust gas is recycled by an exhaust-heat boiler, thereby centrally supplying heat to cities and towns. The invention has the advantages of capability of continuous production, high yield, low investment, low energy consumption, high calcium carbide grade, energy saving, high efficiency and investment saving, and realizes coordinated development of economy, environment and energy sources.

Description

technical field [0001] The invention belongs to a process and device for calcium carbide production, in particular to a process and device for two-stage calcium carbide production and cogeneration of heat and power. Background technique [0002] The main component of calcium carbide is CaC 2 , is an important raw material in the organic synthesis industry and plays an important role in the chemical industry. The methods for producing calcium carbide mainly include electrothermal method and oxythermal method. At present, the electrothermal method is used in the industrial production of calcium carbide. This method has a history of more than 110 years. A large amount of electric energy is consumed, generally 3500-3800kWh / t of calcium carbide, and the comprehensive energy consumption is very high, which is not conducive to energy saving and sustainable development of society. [0003] The production of calcium carbide by oxythermal method is still in the experimental stage. T...

Claims

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Application Information

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IPC IPC(8): C01B31/32F01D15/10C01B32/942
CPCY02P20/10Y02P20/129
Inventor 赵多祥刘守军张智聪杜文广程加林
Owner 山西亿众公用事业有限公司
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