Chemical co-production equipment and method for phosphorus and coal

Abstract

The invention discloses chemical co-production equipment and a method for phosphorus and coal. The equipment is characterized in that high-temperature crude synthesis gas produced in a coal gasifyingreaction is taken as a heat source for producing yellow phosphorus, so that the problem that heat at a high-temperature segment of the crude synthesis gas produced in the coal gasifying reaction cannot be used is solved; moreover, heat can be supplied to yellow phosphorus production, and the energy utilization rate is high; meanwhile, a reaction product CO produced during yellow phosphorus production and the crude synthesis gas are taken as raw materials of synthesis ammonia, so that the yield of liquid ammonia is increased, and a production process is efficient and contributes to energy saving and environment protection. The chemical co-production equipment for the phosphorus and coal comprises a raw material storing-transporting unit, a grinding unit, a pelletizing-drying unit, a reducing reaction unit, a slag cooling unit, a separating-washing unit, an air separating unit, a gasifying unit, a converting unit, a purifying unit and a synthesizing unit. The chemical co-production equipment and method have the advantages of simplified process flow, technically mature in units, energy saving, environmental friendliness and low application risk, and a beneficial technical option is provided for phosphorus and coal chemical complementation in various fields.

Description

technical field [0001] The invention relates to an equipment for co-production of phosphorus coal chemical industry, in particular, the invention relates to an equipment for preparing yellow phosphorus from medium and low-grade phosphate rock and co-producing chemical products at the same time. In addition, the invention also relates to a method for producing yellow phosphorus and chemical products with high efficiency and energy saving. Background technique [0002] Yellow phosphorus is an important basic industrial raw material, mainly used in the preparation of phosphoric acid, phosphide, phosphate, etc., widely used in fertilizer, feed industry, food processing industry, construction industry, medicine, electronics industry and many other fields. [0003] At present, the main method of industrial production of yellow phosphorus is the electric furnace method, that is, phosphate rock, silica, and coke are placed in an electric furnace according to a certain proportion and...

AI Technical Summary

Problems solved by technology

However, neither the water quenching method nor the gas quenching method can utilize the heat above 800°C in the crude synthesis gas, and the heat energy loss in the high temperature section is relatively large

[0006] On the one hand, the production of yellow phosphorus requires a large amount of heat energy in the high-temperature section, and a large amount of CO by-product cannot be fully utilized, and CO is one of the important raw materials for chemical production

On the other hand, the heat energy in the high-temperature section of the crude gas produced by the coal gasification reaction cannot be fully utilized

Therefore, combining the yellow phosphorus production with the coal gasification process, rationally distributing the heat in the process of yellow phosphorus production and gasification reaction, producing yellow phosphorus and co-producing chemical products at the same time will solve the problem of high energy consumption and energy utilization in the current yellow phosphorus production process. The main ways to solve the problems of low efficiency, large environmental impact, and unusable heat energy in the high temperature section of the gasification process

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