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System and method for coupling sensible heat of tail gas of calcium carbide furnace with recycling of calcium material

A calcium carbide furnace tail gas, calcium carbide furnace technology, applied in the direction of calcium carbide, carbide, etc., can solve the problems of unutilized high-grade sensible heat, polluted environment calcium resources, high temperature of calcium carbide furnace tail gas, and achieve high-grade sensible heat. use, save the amount of use, and achieve the effect of reuse

Pending Publication Date: 2017-11-03
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of calcium carbide production, the temperature of the uncooled calcium carbide furnace tail gas is as high as 2000°C, which carries a large amount of high-grade sensible heat. In the traditional calcium carbide production process, the calcium carbide furnace tail gas is cooled to about 400°C by the water-cooled wall. This part is high Grade sensible heat is not utilized, which is a serious waste of energy
Calcium carbide products are processed downstream, and the calcium in calcium carbide exists in the form of calcium carbide slag, most of which are dumped as solid waste, which not only pollutes the environment but also causes waste of calcium resources

Method used

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  • System and method for coupling sensible heat of tail gas of calcium carbide furnace with recycling of calcium material
  • System and method for coupling sensible heat of tail gas of calcium carbide furnace with recycling of calcium material

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 1. Send the raw materials into the calcium carbide furnace to produce calcium carbide, heat at 2100°C for 50 minutes, and discharge the high-temperature tail gas (after cooling by the water wall) out of the calcium carbide furnace. The temperature of the high-temperature tail gas is 400°C.

[0050] 2. The calcium carbide is sent to the acetylene generator to react with water to generate acetylene and calcium carbide slag.

[0051] 3. Send the carbide slag into the drying device, and pass the high-temperature tail gas into the drying device as a heat source to dry the carbide slag to obtain dry carbide slag. The high-temperature tail gas becomes low-temperature tail gas through heat exchange; adjust the high temperature of the drying device through the regulating valve Tail gas intake volume, control the temperature of carbide slag in the drying device at 110°C; the residence time of high-temperature tail gas in the drying device is 1.5h.

[0052] 4. Send the low-tempera...

Embodiment 2

[0055] 1. Send the raw materials into the calcium carbide furnace to produce calcium carbide, heat at 2250°C for 40 minutes, and discharge the high-temperature tail gas (after cooling by the water wall) out of the calcium carbide furnace. The temperature of the high-temperature tail gas is 600°C.

[0056] 2. The calcium carbide is sent to the acetylene generator to react with water to generate acetylene and calcium carbide slag.

[0057] 3. Send the carbide slag into the drying device, and pass the high-temperature tail gas into the drying device as a heat source to dry the carbide slag to obtain dry carbide slag. The high-temperature tail gas becomes low-temperature tail gas through heat exchange; adjust the high temperature of the drying device through the regulating valve Tail gas intake volume, control the temperature of carbide slag in the drying device at 130°C; the residence time of high-temperature tail gas in the drying device is 1h.

[0058] 4. Send the low-temperatu...

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Abstract

The invention discloses a system and a method for coupling sensible heat of tail gas of a calcium carbide furnace with recycling of a calcium material. The system comprises the calcium carbide furnace, an acetylene generator, a drying device, a roasting device and a material mixing bin, wherein a calcium carbide inlet of the acetylene generator is connected with a calcium carbide outlet of the calcium carbide furnace; a high-temperature tail gas outlet of the calcium carbide furnace is connected with a high-temperature tail gas inlet of the drying device; a calcium carbide slag outlet of the acetylene generator is connected with a calcium carbide slag inlet of the drying device; a dry calcium carbide slag outlet of the drying device is connected with a dry calcium carbide slag inlet of the roasting device; a roasting calcium material outlet of the roasting device is connected with a material inlet of the material mixing bin. In the invention, calcium carbide slags are recycled by drying the calcium carbide slags with the sensible heat of high-temperature tail gas of the calcium carbide furnace, thereby improving thermal efficiency of the system.

Description

technical field [0001] The invention belongs to the technical field of calcium carbide production, and in particular relates to a system and method for coupling the sensible heat of calcium carbide furnace tail gas and the recovery and utilization of calcium materials. Background technique [0002] The main component of calcium carbide is calcium carbide, which is an important organic chemical raw material and can synthesize many organic compounds. In our country, after more than 60 years of development and improvement, the calcium carbide industry has become an indispensable basic chemical raw material industry in our country. At the same time, my country's "coal-rich, oil-poor, and gas-poor" energy structure determines that calcium carbide plays an irreplaceable and important role in domestic economic and social development. [0003] Calcium carbide is mainly used to produce acetylene gas. Acetylene is an important chemical raw material. It is mainly used to produce polyv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/942
Inventor 路丙川赵小楠张顺利郭启海刘维娜吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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