Double-region device for efficiently recovering yellow phosphorus combustion heat

Abstract

The invention discloses a double-region device for efficiently recovering yellow phosphorus combustion heat. The device comprises a support, a sufficient combustion region component, a convective heat transfer region component and a steam drum sequentially from bottom to top. One end of a sufficient combustion region down pipe is communicated with the steam drum while the other end of the sufficient combustion region down pipe is communicated with a lower header of the sufficient combustion region component. One end of a sufficient combustion region sufficient combustion region steam guide pipe is communicated with the steam drum while the other end of the sufficient combustion region steam guide pipe is communicated with an upper header of the sufficient combustion region component. One end of a convective heat transfer region down pipe is communicated with the steam drum while the other end of the convective heat transfer region down pipe is communicated with a cooling water inlet pipe of the convective heat transfer region component, one end of a convective heat transfer region steam guide pipe is communicated with the steam drum while the other end of the onvective heat transfer region steam guide pipe is communicated with a steam outlet pipe in the convective heat transfer region component, and a lower head of the sufficient combustion region component is connected with the support. The device is capable of achieving efficient recovery of the yellow phosphorus combustion heat, the theoretical recovery rate can reach more than 75%, energy saving and emission reduction of phosphoric-acid production by a hot method are promoted, and the device has wide application prospect in phosphoric-acid production by a hot method.

Description

technical field [0001] The invention relates to a device for recovering and utilizing yellow phosphorus combustion heat energy, in particular to a dual-zone type high-efficiency recovery yellow phosphorus combustion heat energy device. Background technique [0002] Thermal phosphoric acid can reach a high purity of more than 99.99%, so it is an indispensable and important basic chemical raw material in the national economy, and is required in many high-tech fields such as aerospace, biochemical industry, electronic information, life science, and biomedicine. The production of high value-added and high-purity phosphoric acid (such as: food-grade, pharmaceutical-grade, electronic-grade phosphoric acid, etc.) and fine phosphate products is inseparable from thermal phosphoric acid. Biological preparations such as the anti-flu N1H1 vaccine "Tamiflu-Oseltamivir Phosphate (Orfi)" all need to use high-purity thermal phosphoric acid as raw materials. However, traditional thermal pho...

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Problems solved by technology

Therefore, the outlet temperature of the phosphorus combustion tower usually reaches about 700°C, that is, the low-temperature waste heat below 700°C cannot be effectively recovered

Therefore, only relying on radiation heat transfer (that is, single-zone yellow phosphorus phosphoric acid plant) to implement the recovery of yellow phosphorus combustion heat energy is greatly limited.

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