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Tail gas recycling and purifying process for yellow phosphorus electric furnace

A tail gas recovery and purification process technology, applied in the field of phosphorus chemical industry, can solve problems such as the inability to achieve continuous operation of the exhaust gas extraction system, the inaccuracy of the measured pressure, and the inability to meet the production needs, so as to achieve safe, continuous and stable pumping and avoid equipment life. Shorten and avoid the effect of system trailing changes

Active Publication Date: 2021-03-19
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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  • Tail gas recycling and purifying process for yellow phosphorus electric furnace
  • Tail gas recycling and purifying process for yellow phosphorus electric furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 Shown, a kind of yellow phosphorous electric furnace tail gas recovery and purification process described in this embodiment,

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

[0035] Wherein, the tail gas recovery and purification system includes an air guide pipe 2 connected to the yellow phosphorus electric furnace 1, a pressure transmitter 3 arranged on the air guide pipe 2, the air guide pipe 2 is connected to a three-stage water washing purification tower 4, and a three-stage water washing purification tower 4 The phosphorus receiving tank and the general water seal 5 are respectively connected through pipelines, the general water seal 5 is respectively connected to the tailpipe water seal 6 and the air extraction water seal 7, the tailpipe water seal 6 is provided with a pressure sensor 8, and is connected to the combustion and emptying device 9 ; Described air extra...

Embodiment 2

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

[0044] In order to improve the accuracy of pressure regulation, an air pressure sensor 8 is also set on the tailpipe water seal 6 and air extraction water seal 7. When adjusting according to the pressure conversion, the pressure transmitter 3 on the air duct 2 collects The detected internal pressure of the front-end furnace is sent to the controller for comparison with the mid-section pressure and terminal pressure signals collected by the tailpipe water seal 6 and the exhaust water seal 7, and the pressure change trend is analyzed. If there is an upward trend from the front end to the rear end, According to the rate of increase, the operation of increasing the working power of the gas blower 13 or increasing the number of air extraction passages is successively...

Embodiment 3

[0051] Such as figure 2 As shown, a yellow phosphorus electric furnace tail gas recovery and purification process described in this embodiment is basically consistent with 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 with the pressure value collected by the tailpipe water seal 6 and the suction water seal 7 according to the pressure value measured by the pressure transmitter 3 and then real-time Adjustment.

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Abstract

The invention provides a tail gas recycling and purifying process for a yellow phosphorus electric furnace, and relates to the technical field of phosphorus chemical industry. The tail gas recycling and purifying process for the yellow phosphorus electric furnace is implemented by matching of a tail gas recycling and purifying system and a control and application method. According to the invention, structures or modes such as one or more parallel air exhaust passages and backflow passages, multi-point pressure detection independence, mutual comparison and verification and the like are adopted,so that more accurate regulation on the air exhaust rate and tail gas generation speed matching function of the yellow phosphorus electric furnace (1) is implemented, and meanwhile, the pressure change trend of each point is analyzed and compared; the advanced layout of pressure adjustment is implemented, so that the pressure change has a sufficient buffering space, the following change of the whole system, which is caused by rapid change or short change of the pressure, is avoided, the disorder caused by frequent change of the system and the shortening of the service life of equipment are avoided, and the full-amount safe, continuous and stable pumping of the tail gas of the electric furnace (1) is ensured.

Description

technical field [0001] The invention relates to the technical field of phosphorus chemical industry, in particular to a process for recovering and purifying tail gas from a yellow phosphorus electric furnace. Background technique [0002] The production of yellow phosphorus by electrothermal method is to heat a certain proportion of sintered phosphate rock, silica and coke in an electric furnace at high temperature, so that the phosphorus element in the phosphate rock is sublimated into gas, and after removing dust and other impurities by electric dust removal, these are washed with cooling water. Gas to obtain 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 mixed according to the process requirements and then enter the hig...

Claims

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Application Information

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Patent Type & Authority Applications(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