System and method for comprehensive recovery and utilization of yellow phosphorus molten slag and yellow phosphorus tail gas waste heat

Abstract

The invention relates to a yellow phosphorus molten furnace slag and yellow phosphorus tail gas waste heat comprehensive recycling system and method. The system comprises a yellow phosphorus furnace gas filtering and recycling system, a yellow phosphorus molten furnace slag granulation cooling and sensible heat recycling system, a waste heat recycling system and a cement production system. The yellow phosphorus furnace gas filtering and recycling system comprises a filtering device, a draught fan, a washing device and a gas storage tank. The yellow phosphorus molten furnace slag granulation cooling and sensible heat recycling system comprises a high-temperature storage tank, a revolving kiln, a grate-type cooling machine and a draught fan, wherein the high-temperature storage tank is connected with the revolving kiln and the grate-type cooling machine in sequence, and the draught fan is connected with the revolving kiln and the grate-type cooling machine. The waste heat recycling system comprises a yellow phosphorus tail gas fuel gas boiler, a fuel gas waste heat boiler and a generator set, wherein steam generated by the two boilers is fed into the generator set to generate electricity. Yellow phosphorus furnace slag generated by the grate-type cooling machine is fed into the cement production system. By means of the yellow phosphorus molten furnace slag and yellow phosphorus tail gas waste heat comprehensive recycling system and method, the problem of environment pollution of yellow phosphorus enterprises can be solved, and very good economic benefits can be created.

Description

technical field [0001] The invention belongs to the field of yellow phosphorus production waste waste heat recovery and utilization, and relates to a system and method for comprehensive recovery and utilization of yellow phosphorus molten slag and yellow phosphorus tail gas waste heat. Background technique [0002] The total production scale, output and export volume of yellow phosphorus in my country rank first in the world. The current yellow phosphorus production process is to put phosphate rock, coke and silica raw materials into the electric furnace for reaction in proportion, then spray and cool the furnace gas to obtain crude phosphorus, and then import the crude phosphorus into the refining tank for two-stage refining, and finally obtain Phosphorus products. 2500~3000m of by-product tail gas per 1t of yellow phosphorus produced 3 . Yellow phosphorus tail gas is a high-quality gas fuel (the calorific value is about 10659kJ / Nm 3 ), the main component is CO, and the...

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a system for comprehensive recovery and utilization of yellow phosphorus molten slag and yellow phosphorus tail gas waste heat. This system can not only solve the problem of environmental pollution in yellow phosphorus enterprises, but also create a good economic benefit

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