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Smoke temperature control device and method

A flue gas temperature and bypass pipe technology, applied in the field of temperature control devices, can solve the problems of basic investment, construction cost and operating cost increase, purification system processing air volume increase, etc., to reduce the probability of equipment damage, save basic investment and The effect of reducing construction cost and reducing air volume

Active Publication Date: 2015-06-03
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method is to mix normal-temperature air into the high-temperature flue gas to reduce the temperature of the flue gas, but this method directly leads to an increase in the processing air volume of the purification system, and increases in basic investment, construction costs and later operating costs

Method used

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  • Smoke temperature control device and method
  • Smoke temperature control device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] like figure 1 The device for controlling flue gas temperature of the present invention shown is composed of the following structure: a purification main pipe 1, a bypass pipe 10 is provided on the purification main pipe 1, and the two ends of the bypass pipe 10 are provided with a bypass pipe front valve 8 and a bypass pipe. A heat exchanger 13 is provided in the bypass pipe 10 between the valve 9 after the bypass pipe, the valve 8 before the bypass pipe and the valve 9 after the bypass pipe. The feed end of the heat exchanger 13 is provided with a control valve 11 for heat exchange. The discharge end of the device 13 is connected to the cooling pipe 2, and a cooling pool 3 and a circulation pump 4 are arranged between the feed end and the cooling pipe 2. The circulation pump 4 is arranged on one side of the feed end, and the main pipe 1 is purified A main valve 7 is provided between the two ports connected to the bypass pipe 10, and the heat exchange medium in the hea...

Embodiment 2

[0023] like figure 2 As shown, after the supply quantity and supply pressure of the condensing agent 12 are required, the cooling pool 3 and the circulation pump 4 can be eliminated, and the cooled condensing agent 12 directly enters the return water system, and the others are the same as in the first embodiment.

[0024] In the present invention, when the flue gas temperature detected at the front measuring point 5 is lower than the upper limit value such as 140°C, the main valve 7 is in a fully open state, and the valve 8 in front of the bypass pipe and the valve 9 behind the bypass pipe are both in a closed state. The flue gas enters the purification system through the purification supervisor 1. When the flue gas temperature exceeds the upper limit value, the valve 8 in front of the bypass pipe and the valve 9 behind the bypass pipe are opened simultaneously, and then the main valve 7 is closed to guide the flue gas to the bypass pipe 10 to cool the high-temperature flue g...

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Abstract

The invention relates to a temperature control device and a method. A smoke temperature control device consists of a main purification pipe, a bypass pipe, a front valve of the bypass pipe, a rear valve of the bypass pipe and a heat exchanger, wherein the bypass pipe is arranged on the main purification pipe, the front valve of the bypass pipe and the rear valve of the bypass pipe are arranged at two ends of the bypass pipe, and the heat exchanger is arranged in the bypass pipe between the front valve of the bypass pipe and the rear valve of the bypass pipe. The device and the method have the advantages that a cooling system is arranged in a purification pipeline, the heat exchanger is arranged in the cooling system, condensing agents are introduced into the heat exchanger, and the purpose of reducing the temperature of smoke is achieved by heat exchange between the condensing agents and high-temperature smoke. Temperature monitoring points are arranged in the purification pipeline before and after high-temperature smoke is cooled, the cooling system can be switched in real time according to the smoke temperature change, the flow rate of the condensing agents is adjusted and the purpose of stably controlling the smoke temperature is achieved. The condensing agents can be recycled in a closed cooling pipeline system, and no pollutant is discharged by the whole cooling system.

Description

technical field [0001] The invention relates to a device and method for controlling temperature, in particular to a device and method for controlling the temperature of flue gas in a thermal furnace for controlling and stabilizing the temperature of high-temperature flue gas discharged from an aluminum electrolytic cell. Background technique [0002] After thermal processes such as heat transfer, mass transfer, and combustion inside the thermal furnace, a large amount of high-temperature flue gas will inevitably be generated to be processed. If the high-temperature flue gas is not properly cooled, it will directly affect the subsequent flue gas purification system. construction scale and energy consumption level. [0003] For example, in the aluminum electrolysis industry, the flue gas discharge temperature of the electrolytic cell is often higher than 150°C, and even reaches above 200°C when the cell condition is bad. The traditional method is to mix normal-temperature ai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/06C25C3/22
Inventor 刘雅锋王富强宋海琛
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE