Equipment and tail gas treatment method for synchronously treating tail gas of multiple graphitization furnaces

Abstract

The invention discloses equipment and a tail gas treatment method for synchronously treating tail gas of multiple graphitization furnaces. The equipment comprises draft fans for controlling the air pressure and the air quantity of a main graphitization furnace tail gas pipe, and further comprises a fresh air system, a turbulent flow absorbing system, monitoring systems and a control system, wherein the fresh air system is arranged in an external furnace cover and the main tail gas pipe of each graphitization furnace; the input end of the turbulent flow absorbing system is connected with the main graphitization furnace tail gas pipe through a pipeline; the output end of the turbulent flow absorbing system is connected with an external gas discharge device through a pipeline; the monitoring systems are arranged in the fresh air system and the turbulent flow absorbing system; and the control system is connected with the fresh air system, the monitoring systems and the turbulent flow absorbing system, and is used for controlling the working of the fresh air system and the turbulent flow absorbing system through monitoring signals transmitted by the monitoring systems. By utilizing the equipment, the construction number of the tail gas treatment equipment is reduced, the equipment construction cost is saved to a large extent, and operation personnel and electricity consumption are reduced, so that the production cost is greatly saved; the tail gas is cooled and at the same time the air pressure in the graphitization furnaces is precisely adjusted and controlled; and the graphitization furnace gas supply process is improved.

Description

technical field [0001] The present invention relates to the purification treatment equipment and tail gas treatment method of tail gas in industries such as graphite, solar photovoltaic, metallurgy, chemical industry, machinery, electronics, electroplating, medicine, etc., especially relates to a kind of equipment and tail gas treatment method for treating tail gas of multiple graphitization furnaces at the same time. Background technique [0002] When the graphitization furnace is heated to the purification temperature, halogen gas (such as chlorine gas) is introduced. The halogen gas reacts with impurity elements in the graphite material such as Fe, Ca, Ba, K, B, etc. under high temperature conditions to form halides. These new compounds are gaseous at the purification temperature and are released from the exhaust port of the graphitization furnace. A part of the halogen gas that does not participate in the purification chemical reaction and the sulfur dioxide and dust that...

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Problems solved by technology

[0005] Because the tail gas discharged from the purified graphite products of the graphitization furnace contains a large amount of chlorine, metal chlorides, fluorides and dust, when the tail gas passes through the heat exchanger, it is easy to condense and precipitate on the surface of the heat exchanger, often blocking the heat exchanger pipes , each furnace needs to be cleaned regularly; it forms certain restrictions on normal production

[0006] The tail gas discharged from the graphitization furnace contains a large amount of highly toxic gases (such as chlorine gas); the wind pressure requirements in the furnace are very strict when the tail gas is discharged. Excessive negative pressure not only affects the purification quality of the product, wastes a lot of process gas, but also increases the exhaust gas system. Operation burden; when the negative pressure is too low, highly toxic gases such as chlorine gas are easy to leak, causing hidden dangers to the surrounding environment and the life safety of production workers

Due to the above reasons, in the prior art, the tail gas system of a single graphitization furnace can only process the tail gas discharged from one furnace at the same time, which requires the construction of a lot of equipment, which greatly increases the economic cost and labor cost, and causes energy consumption. waste, affecting production efficiency

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