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A yellow phosphorus electric furnace tail gas recovery and purification process

A technology of tail gas recovery and purification process

Active Publication Date: 2022-08-02
YUNNAN JIANGLIN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pressure transmitter of this device is installed at the tail gas water seal, and the measured pressure is still not accurate enough. There is a corresponding time difference between the feedback value and the value of the pumping pressure to be adjusted, and the tail gas produced by the electric furnace changes relatively quickly. For example, when the amount of tail gas drops sharply when the electric furnace slags out, or when the electric furnace suddenly shuts down, it cannot be effectively treated, and the continuous operation of the exhaust gas extraction system cannot be realized, which cannot meet the production needs, so that the proposed scheme has corresponding safety risks

Method used

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  • A yellow phosphorus electric furnace tail gas recovery and purification process
  • A yellow phosphorus electric furnace tail gas recovery and purification process

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Experimental program
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Effect test

Embodiment 1

[0033] like figure 1 As shown, a kind of yellow phosphorus electric furnace tail gas recovery and purification process described in this embodiment,

[0034] It is realized through the coordination control and application method of the exhaust gas recovery and purification system;

[0035] Wherein, the tail gas recovery and purification system comprises an air duct 2 connected with the yellow phosphorus electric furnace 1, a pressure transmitter 3 arranged on the air duct 2, and the air duct 2 is connected to a tertiary water cleaning tower 4, and the tertiary water cleaning tower 4 The phosphorus receiving tank and the total water seal 5 are respectively connected through pipes, and the total water seal 5 is respectively connected to the tail stack water seal 6 and the air extraction water seal 7. The tail stack water seal 6 is provided with a pressure sensor 8 and is connected to the combustion and evacuation device 9 ; Described pumping water seal 7 connects initial washin...

Embodiment 2

[0043] like figure 1 As shown, a yellow phosphorus electric furnace tail gas recovery and purification process described in this embodiment is basically the same as that of Embodiment 1, and the difference is that,

[0044] In order to improve the accuracy of pressure regulation, the air pressure sensor 8 is also set on the tail stack water seal 6 and the air extraction water seal 7, and when adjusting according to the pressure transformation, the pressure transmitter 3 on the air duct 2 is collected. The obtained front-end furnace pressure is compared with the mid-section pressure and end pressure signals collected by the tail stack water seal 6 and the air extraction water seal 7 and sent to the controller for comparison, and the pressure change trend is analyzed. According to the rising rate, the operation of increasing the working power of the gas blower 13 or increasing the number of air extraction passages is taken in turn; on the contrary, if it is a downward trend, the...

Embodiment 3

[0051] like figure 2 As shown, the yellow phosphorus electric furnace exhaust gas recovery and purification process described in this embodiment is basically the same as that of embodiment 1 or 2, the difference is that a regulating valve is set between the front U-shaped water seal 12 and the gas fan 13 16. The pressure transmitter 3 is connected to the regulating valve 16, and the opening of the regulating valve 16 is compared in real time according to the pressure value measured by the pressure transmitter 3 and the pressure value collected by the tail stack water seal 6 and the air extraction water seal 7. Adjustment.

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Abstract

The invention provides a yellow phosphorus electric furnace tail gas recovery and purification process, which relates to the technical field of phosphorus chemical industry and is realized by the coordinated control and application method of a tail gas recovery and purification system; The structure or method of independent pressure detection and mutual comparison and verification realizes more accurate adjustment of the matching function of the extraction rate and the exhaust gas generation rate of the yellow phosphorus electric furnace (1). The advance layout of pressure adjustment provides sufficient buffer space for pressure changes, avoids the trailing changes of the entire system caused by rapid pressure changes or short changes, avoids confusion caused by frequent system changes and shortens equipment life, and ensures that the electric furnace (1 ) The full amount of exhaust gas is safely, continuously and stably pumped.

Description

technical field [0001] The invention relates to the technical field of phosphorus chemical industry, in particular to a yellow phosphorus electric furnace tail gas recovery and purification process. Background technique [0002] The production of yellow phosphorus by electrothermal method is to heat a certain proportion of sintered phosphate rock, silica and coke at high temperature in an electric furnace, so that the phosphorus element in the phosphate rock is sublimated into gas, and after removing dust and other impurities by electrostatic precipitator, cooling water is used to wash these The gas gives liquid yellow phosphorus. In actual production, the yellow phosphorus tail gas produced by the yellow phosphorus electric furnace is mainly used as a heat source or as a raw material gas. [0003] When the yellow phosphorus electric furnace is working normally, the phosphate rock, coke and silica are batched according to the process requirements and then enter the high tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00F27D19/00C01B25/027
CPCF27D17/008F27D19/00C01B25/027F27D2019/0009Y02P10/25
Inventor 杨辉饶志臻王文生宋成发张仕平王海东
Owner YUNNAN JIANGLIN GROUP