Special phosphorus burning tower and thermal-process phosphoric acid production heat-electricity self-balancing system

Abstract

The invention relates to a special phosphorus burning tower, which includes a steam drum, an annular membrane water wall assembly, a phosphorus burner and a water vapor circulating pipeline. The upper end and the lower end of the annular membrane water wall assembly are respectively provided with an upper header subassembly and a lower header subassembly. The upper header subassembly comprises an annular upper header and a conical upper head, the top or side wall of which is provided with a process gas outlet pipe. The lower header subassembly includes an annular lower header and a lower head. The thermal-process phosphoric acid production heat-electricity self-balancing system includes the special phosphorus burning tower, a hydration system and an extraction condensing type steam turbine generator unit. The special phosphorus burning tower provided in the invention ensures that the strength requirement can be satisfied under the conditions of enhanced steam pressure and temperature and the temperature of a reaction tower inner wall surface is controlled at an allowable temperature at the same time, so that corrosion by high temperature process gas can be avoided, and the special phosphorus burning tower can be ensured to generate a medium-pressure steam by-product and can operate safely and reliably for a long term. Meanwhile, the medium-pressure steam by-product of the special phosphorus burning tower is introduced into the extraction condensing type steam turbine generator unit, thus realizing maximum energy utilization.

Description

Technical field [0001] The invention relates to the technical field of heat energy recovery and utilization, in particular to a special phosphorus-burning tower and a thermal-process phosphoric acid production thermoelectric self-balancing system. Background technique [0002] Thermal phosphoric acid can reach a high purity of over 99.99%, so it is an indispensable and important basic chemical raw material in the national economy, such as luminescent materials in the high-tech field, anti-flu N1H1 vaccine "Tamiflu-oseltamivir phosphate ( Orfi)" and other biological agents need to use high-purity thermal phosphoric acid as raw materials. However, traditional thermal phosphoric acid production is also a high energy consumption and carbon dioxide emission industry. Does not meet the national policy requirements for energy conservation and emission reduction. [0003] The production process of thermal phosphoric acid is mainly divided into smelting (extracting elemental yellow phosph...

AI Technical Summary

Problems solved by technology

Once the heat exchange tube cracks, a certain pressure of steam-water mixture will be sprayed into the tower, further aggravating the corrosion of other heating surfaces in the furnace

[0012] (3) Due to the limitation of the strength of structural pressure components and wall corrosion, the heat energy utilization and recovery device produces low-pressure saturated steam with a pressure lower than 1.0MPa, which is mainly used for its own process needs and other low-pressure heat users. When there is no surrounding For other heat users, the excess low-pressure steam can only be vented, causing secondary heat pollution, and the energy utilization rate of the entire system is low

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