Methylbenzene recycling system

Abstract

The invention provides a methylbenzene recycling system with high recycling rate and low operating cost, comprising at least two absorbing tanks, a steam generator, a cooler, a separating box and a fan; the two absorbing tanks are respectively hollow structure and the inner sides thereof are respectively filled with active carbon; the two absorbing tanks are respectively provided with an absorbing air inlet, an absorbing exhaust outlet, a desorbing steam inlet and a desorbing exhaust outlet; the absorbing air inlet of each absorbing tank is connected with an air outlet of the fan by a solenoid valve; an air inlet of the fan is communicated with a tail gas collecting port; an exhaust outlet of the steam generator is connected with the desorbing steam inlet of each absorbing tank by the solenoid valve; the absorbing exhaust outlet is arranged on the top part of each absorbing tank and provided with the solenoid valve with the atmosphere so as to exhaust gas to the atmosphere; the desorbing exhaust outlets of the all absorbing tanks are connected with an air inlet of the cooler by the solenoid valve; and a liquid outlet of the cooler is connected with a liquid inlet of the separating box.

Description

technical field [0001] The invention relates to a toluene recovery system, which is used for recovering toluene gas in industrial production tail gas. Background technique [0002] As an organic solvent, toluene is widely used in industrial production, especially in the textile industry, followed by environmental pollution caused by volatilization of toluene. Among the known methods for treating toluene tail gas, there is a kind of treatment by activated carbon adsorption of toluene, which includes filter, cooler, blower fan and activated carbon adsorber, and the tail gas containing toluene gas passes through the filter to filter out the solids of large particles , and then the exhaust gas is properly cooled by the cooler, and finally the exhaust gas is sent to the activated carbon adsorber by the fan. In the activated carbon adsorber, the toluene gas is adsorbed by the activated carbon, while other gases are discharged to the atmosphere. The disadvantage of this toluene tr...

AI Technical Summary

Problems solved by technology

The disadvantage of this toluene treatment method is that the adsorption capacity of activated carbon decreases with the prolongation of use time. On the one hand, the decline in adsorption capacity makes the tail gas emission not up to standard. On the other hand, activated carbon often needs to be replaced. It is also harmful to the body of the operator, and the price of activated carbon is high, resulting in an increase in the cost of exhaust gas treatment

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