System for joint production of carbide, lime nitrogen and carbon black and method

Abstract

The invention discloses a system and method for the joint production of calcium carbide, lime nitrogen and carbon black. The system includes: a calcium carbide granulation tower, in which a heat exchange area and a gas distribution area are defined from top to bottom. The granulator includes a rotating disk and a rotating shaft arranged at the lower end of the rotating disk. A carbon dioxide distribution disk is arranged below the rotating disk. An inlet of calcium carbide liquid and an outlet of carbon dioxide after heat exchange are arranged at the upper end of the heat exchange area. A second carbon dioxide is arranged in the gas distribution area. Inlet and outlet of calcium carbide particles; nitriding furnace, which defines the nitriding reaction space and gas distribution space from top to bottom. The nitriding reaction space has an inlet of calcium carbide particles and an outlet of gas after nitriding. Lime nitrogen outlet; first cyclone separator, with mixed gas inlet, first dedusted gas outlet and dust outlet containing lime nitrogen powder and carbon black; powder separation device, with mixed dust inlet, lime nitrogen powder outlet and carbon black Export.

Description

technical field [0001] The invention belongs to the technical field of chemical industry. Specifically, the invention relates to a combined production system and method of calcium carbide, lime nitrogen and carbon black. Background technique [0002] Lime nitrogen has a wide range of uses in agriculture. Such as making rice base fertilizer, eliminating acidity of soil, supplementing calcium of plants, etc. Among the calcium chemical fertilizers, the calcium content of calcium nitrate is 19.4%, the calcium content of superphosphate is 18-21%, the calcium content of calcium magnesium phosphate fertilizer is 21-24%, and the calcium content of phosphate rock powder is 20-35%. %. The calcium content of lime nitrogen is 38.5%, and its fertilizer effect is much higher than other calcium fertilizers. Lime nitrogen has a significant effect on supplementing calcium in plants, especially calcium-loving plants. On the schistosomiasis defense line, use lime nitrogen to eliminate snai...

AI Technical Summary

Problems solved by technology

However, the existing domestic lime nitrogen is basically in the form of powder. As an agricultural fertilizer, the powder will fly when it is applied, which will seriously pollute the environment. At the same time, the powder floating on the leaves of the crops will cause the crops to burn or die.

And because the specific gravity of powdered lime nitrogen is small, it floats on the ground surface or water surface when fertilizing, which is easy to cause the loss of fertilizer and the allergies and poisoning of humans and animals, so it is not suitable for agricultural use.

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