Constant-pressure inner loop acidification blowing absorption device

Abstract

The invention discloses a constant-pressure inner loop acidification blowing absorption device which comprises an absorption bottle, a first bubbler, a first blowing plug, a circulating flow meter, a second blowing plug, a constant-pressure acid feeder, a second bubbler and a reaction flask, wherein the constant-pressure acid feeder comprises an acid feeding bottle and a lower connector which are arranged up and down; the absorption bottle is connected with the first bubbler in a sealing way; the first bubbler is connected with an air inlet of the circulating flow meter in a sealing way; an air outlet of the circulating flow meter is connected with an air inlet pipe of the second blowing plug in a sealing way; an air outlet pipe of the second blowing plug is connected with the acid feeding bottle in a sealing way; the constant-pressure acid feeder is connected with the second bubbler in a sealing way; the second bubbler is connected with the reaction flask in a sealing way; the second bubbler is connected with an air inlet pipe of the first blowing plug in a sealing way; an air outlet pipe of the first blowing plug is connected with the first bubbler in a sealing way. The constant-pressure inner loop acidification blowing absorption device has the advantages that acid gas leakage, caused by the fact that pressure increases since acid is added inside and outside a system, can be prevented, so that the stability is improved; a pressure regulator is not added, the pressure can be maintained constant, and the device is simple to operate.

Description

technical field [0001] The invention relates to an acidizing air blowing absorption device, in particular to a constant pressure internal circulation acidizing air blowing absorption device. Background technique [0002] Environmental water, sediment, soil and the atmosphere often contain sulfide and cyanide, which are highly toxic and must be monitored in environmental investigations. Environmental detection samples generally have complex matrices, and the detection of sulfide and cyanide samples is easily interfered. At present, the method of "acidification-blowing-absorption-determination" is routinely used at home and abroad for detection. [0003] On the one hand, the traditional acidification gas blowing absorption device needs an external gas source, and the experimental device is relatively complicated; on the other hand, the device usually uses an open system for gas-liquid separation, and in the initial stage of gas-liquid separation, due to the hydrogen sulfide i...

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Problems solved by technology

[0003] On the one hand, the traditional acidification gas blowing absorption device needs an external gas source, and the experimental device is relatively complicated; on the other hand, the device usually uses an open system for gas-liquid separation, and in the initial stage of gas-liquid separation, due to the hydrogen sulfide in the gas phase And the concentration of hydrocyanic acid is high, the bubbles are difficult to fully contact with the absorption liquid, resulting in the loss of sulfide and cyanide, and the recovery rate is low

At present, some scholars in China use the internal circulation method for pretreatment. Although the internal circulation method can improve the defects of the traditional acidizing air blowing absorption device, because the acid addition process in the internal circulation method will increase the internal pressure of the system, it is necessary to Additional adjustment via a pressure regulator, complex operation and difficult to control pressure changes

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