Technology and kiln for producing calcium magnesium phosphate and potassium fertilizer by using yellow phosphorus tail gas as fuel with kiln method

Abstract

The invention discloses a heat-exchange type production technology and kiln for total-tail-gas calcium magnesium phosphate fertilizer and calcium magnesium potassium phosphate fertilizer. According to the method, yellow phosphorus tail gas is fed into a tail gas inlet channel, the yellow phosphorus tail gas and oxygenation gas in an oxygenation channel are fed into a burning chamber together, high-temperature gas and high-temperature flames are produced after burning, ore raw materials in a melting tank are heated and molten by the high-temperature gas and high-temperature flames, smoke flows into a heat exchange chamber through a circulating channel and exchanges heat with the yellow phosphorus tail gas and the oxygenation gas in the tail gas inlet channel and the oxygenation channel, and then the smoke is exhausted through a smoke outlet. The kiln comprises the burning chamber; one side of the burning chamber is connected with the tail gas inlet channel and the oxygenation channel; a melting chamber is arranged on the other side of the burning chamber; the melting tank is arranged at the bottom inside the melting chamber; the melting chamber is connected with the heat exchange chamber through the gas circulating channel; the smoke outlet is arranged on the heat exchange chamber; and the heat exchange chamber is closely attached to the tail gas inlet channel and the oxygenation channel. The technology and the kiln have the characteristics of being low in environmental pollution, low in production cost and capable of saving heat.

Description

technical field [0001] The invention relates to a calcium-magnesium-phosphorus and potash fertilizer production process and a kiln, in particular to a kiln method for producing calcium-magnesium-phosphorus and potash fertilizers and a kiln with yellow phosphorus tail gas as fuel. Background technique [0002] At present, domestic calcium magnesium phosphate fertilizer is produced by blast furnace method. Each ton of calcium magnesium phosphate fertilizer consumes about 300 kilograms of coke, which has high energy consumption, serious pollution, high labor intensity and high production cost. Therefore, most domestic enterprises have stopped production or semi-suspended production. . The original blast furnace calcium magnesium phosphate fertilizer production capacity in our province is 1.37 million tons / year, but the current annual output is less than 100,000 tons. [0003] The invention uses the tail gas (waste gas) discharged from the production of yellow phosphorus to rep...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic calcium-magnesium phosphate fertilizers are produced by the blast furnace method, and each ton of calcium-magnesium phosphate fertilizers consumes about 300 kilograms of coke, which leads to high energy consumption, serious pollution, high labor intensity, and high production costs. Therefore, most domestic enterprises have stopped or semi-stopped production.

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