Equipment for recovering and utilizing heat energy generated by phosphor combustion and system for preparing phosphoric acid by hot method

A technology of heat energy recovery and yellow phosphorus, which is applied in the recovery and utilization of heat energy and the recovery and utilization of yellow phosphorus combustion heat energy in the production of thermal phosphoric acid. Water-cooled wall heat transfer and other issues, to achieve the effect of increasing economic and social benefits, improving waste heat recovery efficiency, and saving water resources

Inactive Publication Date: 2002-06-26
TSINGHUA UNIV +1
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Problems solved by technology

[0010] The main disadvantage of this patented technology is that if the temperature of the water wall is below the solidification temperature of phosphorus pentoxide, phosphorus pentoxide will solidify and adhere to the wall surface, which will affect the heat transfer of the water wall and reduce the combustion. The channel area of ​​the gas (especially near the convective tube bundle heat exchanger at the outlet)
[0019] The heat energy recovery process of this patent also has the following defects: ①According to the diagram and description of the patent, recovering waste heat can only turn pressurized water into superheated water or steam into superheated steam, but cannot turn low-temperatu

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  • Equipment for recovering and utilizing heat energy generated by phosphor combustion and system for preparing phosphoric acid by hot method
  • Equipment for recovering and utilizing heat energy generated by phosphor combustion and system for preparing phosphoric acid by hot method
  • Equipment for recovering and utilizing heat energy generated by phosphor combustion and system for preparing phosphoric acid by hot method

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Embodiment Construction

[0033] Yellow phosphorus combustion heat energy recovery and utilization device and thermal process phosphoric acid production system embodiment of the present invention design are described in detail as follows in conjunction with accompanying drawing:

[0034] The structure of the yellow phosphorus combustion heat energy recovery and utilization device in this embodiment is as follows figure 1 , 2 As shown, it is made up of a steam drum 2 and a combustion tower 5 with heat energy recovery function; the combustion tower includes: a plurality of riser tubes 53 and enhanced heat exchange fins 54 connected between each tube form a ring with a hollow cavity Membrane heat exchanger; an annular upper header 52 and a lower header 51 arranged on the upper and lower ends of the heat exchanger and connected to the riser pipe; an upper head 551 installed on the upper and lower ends of the upper and lower headers , the lower head 552; a closed shell 561 formed by the insulation layer 56...

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Abstract

An equipment for recovering and utilizing the heat energy generated by burning yellow phosphorus and a system for preparing phosphoric acid by the hot method are disclosed. It is composed of steam manifold and burning tower with heat energy recovering function. The burning tower consists of ring-shaped membrane heat exchanger with fins, heat-insulaitng enclosed casing, P2O5 gas outlet tube, connecting tube of phosphorus sprayer, etc.. Its advantages include low consumption of coal, water and energy, low cost and reduced environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of recovery and utilization of heat energy, in particular to the technical field of recovery and utilization of yellow phosphorus combustion heat energy in thermal phosphoric acid production. Background technique [0002] Phosphoric acid and its phosphates are important components of the chemical industry. The production of all phosphides and phosphates is inseparable from basic chemical raw materials - phosphorus and phosphoric acid. According to the production process of phosphoric acid, it can be divided into wet process phosphoric acid and thermal process phosphoric acid. The phosphoric acid produced by the decomposition of strong acid (such as sulfuric acid, nitric acid, hydrochloric acid, fluosilicic acid, etc.) and phosphate rock is called wet process phosphoric acid. Due to the low concentration of wet-process phosphoric acid (<40%) and many impurities, it is mainly used in the production of agr...

Claims

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Application Information

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IPC IPC(8): C01B25/12C01B25/20
CPCY02P20/10
Inventor 宋耀祖梅毅张冠忠杨亚斌
Owner TSINGHUA UNIV
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