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Calcium carbide furnace and shaft furnace combined system

A calcium carbide furnace and calcium carbide technology, which is applied in the petroleum industry, gasification device electrodes, chemical instruments and methods, etc., can solve the problems of large energy loss, unresearched combined systems, and high investment in process equipment, so as to increase production and facilitate production. The effect of subsequent use

Active Publication Date: 2016-06-08
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The closed calcium carbide furnace produces 1t of calcium carbide and generally by-products calcium carbide furnace gas (also known as synthesis gas) 400m 3 , its main components: carbon monoxide accounts for 65-85%, hydrogen accounts for 7-12%, large energy loss, low flue gas volume, syngas is mainly used as fuel for boilers or power generation, and the user of syngas is single
In addition, the existing synthesis gas utilization technology: purification, desulfurization, decarbonization and conversion for chemical production, the output of synthesis gas is low, the main component is carbon monoxide, and the hydrogen comes from the hydrogen production device, the investment in process equipment is high, and the area is large
[0004] Therefore, the combined use of calcium carbide furnace and shaft furnace that can adjust the output and composition of syngas remains to be studied

Method used

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  • Calcium carbide furnace and shaft furnace combined system
  • Calcium carbide furnace and shaft furnace combined system
  • Calcium carbide furnace and shaft furnace combined system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] raw material:

[0048] Lime is used as the calcium-based raw material, the CaO content is 93%, and the particle size is 5-40mm;

[0049] Using semi-coke as the carbon-based raw material, the fixed carbon content is 83%, and the particle size is 5-20mm;

[0050] Oxygen-coal mixed injection: use pulverized coal as raw material, particle size -200 mesh > 60%, fixed carbon content is 75%; pulverized coal carrier gas is purified pressurized flue gas from calcium carbide furnace;

[0051] The pressure of water vapor is 1.2MPa, and the consumption of water vapor is 450kg / t. Calcium carbide.

[0052] Preparation:

[0053] (1) lime and blue charcoal are mixed by 100:68, obtain charge;

[0054] (2) Transport the mixed materials to the furnace top silo through the belt, and feed the silo charge into the calcium carbide furnace through the feeding pipe to start the arc and heat the charge;

[0055] (3) When the three-phase electrode penetrates the well in the calcium carbide fu...

Embodiment 2

[0057] raw material:

[0058] Lime is used as the calcium-based raw material, the CaO content is 93%, and the particle size is 5-40mm;

[0059] Using semi-coke as the carbon-based raw material, the fixed carbon content is 83%, and the particle size is 5-20mm;

[0060] Oxygen-coal mixed injection: use pulverized coal as raw material, particle size -200 mesh > 60%, fixed carbon content is 75%; pulverized coal carrier gas is purified pressurized flue gas from calcium carbide furnace;

[0061] The pressure of water vapor is 1.2MPa, and the consumption of water vapor is 405kg / t. Calcium carbide.

[0062] Preparation:

[0063] (1) lime and blue charcoal are mixed by 100:68, obtain charge;

[0064] (2) Transport the mixed materials to the furnace top silo through the belt, and feed the silo charge into the calcium carbide furnace through the feeding pipe to start the arc and heat the charge;

[0065] (3) When the three-phase electrode penetrates the well in the calcium carbide fu...

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Abstract

The invention discloses a calcium carbide furnace and shaft furnace combined system. The system comprises a calcium carbide furnace and a shaft furnace, wherein the calcium carbide furnace comprises a furnace body, a plurality of electrodes and a plurality of spray guns; a calcium carbide production space is defined in the furnace body; the furnace body is provided with a synthesis gas outlet and a calcium carbide outlet; the plurality of electrodes are embedded into the calcium carbide production space from the furnace body; the plurality of spray guns are embedded into the calcium carbide production space from the top wall and / or the side wall of the furnace body and are used for providing water vapor, oxygen and coal dust into the calcium carbide production space; the shaft furnace is connected with a purification device and utilizes synthesis gas to perform a reaction. According to the system, by arranging the spray guns on the furnace body and utilizing the spray guns to provide reaction raw materials, when calcium carbide is prepared, yield of the synthesis gas is also improved. Moreover, on the basis of utilizing the spray guns to provide the coal dust and the oxygen, the water vapor is further provided, the water vapor and the coal dust react to generate a great volume of carbon monoxide and hydrogen, and the subsequent utilization of the synthesis gas is convenient.

Description

technical field [0001] The invention relates to a combined use system of calcium carbide furnace and shaft furnace. Background technique [0002] The development of China's calcium carbide industry has a history of more than 50 years, and has achieved world-renowned achievements. The production capacity and output have leapt to the first place in the world and are showing a rapid upward trend. In recent years, due to excessive investment, blind development, and constraints from market, raw materials, energy, and environmental protection, the output of calcium carbide accounted for more than 90% of the world's calcium carbide production capacity in 2013. The main problems in the current production of calcium carbide are high energy consumption, serious pollution, waste of resources, high cost, poor economic benefits and backward economic indicators. Advanced production technology, stable product performance, and optimized energy utilization should be the current goals pursue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/48C10J3/50C10J3/84C01B31/32C01B3/50C01B32/942
CPCC01B3/50C01B2203/0465C01B2203/0475C01B2203/0485C10J3/48C10J3/50C10J3/84C10J2200/12C10J2200/152C10J2300/093C10J2300/0959C10J2300/0976C10J2300/0996C10J2300/1603C10J2300/1612C10J2300/1615C10J2300/164C10J2300/1656
Inventor 邓君薛逊曹志成张岚唐敬坤范志辉吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST