Self-heat supply two-section chemical activation furnace

Abstract

The invention relates to the field of active carbon preparation, in particular to a self-heat supply two-section chemical activation furnace which removes harmful emissions and lowers heating energy consumption cost. The furnace comprises an activation reaction furnace, and a gas outlet pipeline, a gas inlet pipeline and an exhaust pipeline that are connected with the activation reaction furnace,wherein an inner cavity of the activation reaction furnace is provided with a screw feeder; the screw feeder divides the inner cavity of the activation reaction furnace into a drying section and an activation section; the drying section is connected with one end of the exhaust pipeline; the activation section is connected with one end of the gas outlet pipeline and one end of the gas inlet pipeline; the gas inlet pipeline extends into the activation reaction furnace to form a reflux heat pipeline and is connected with the reflux heat pipeline; and the other end of the reflux heat pipeline penetrates through the screw feeder and extends to the drying section.

Description

technical field [0001] The invention relates to the field of activated carbon preparation, in particular to a self-heating two-stage chemical activation furnace capable of removing harmful emissions and reducing heating energy consumption costs. Background technique [0002] In the current production of phosphoric acid activated carbon, the heating method of internal heating reverse hot gas and material flow is adopted, that is, the hot air is heated from the furnace head to the furnace tail to supply hot air, and the carbonization and activation materials flow from the furnace tail to the furnace head. In the production process, a large amount of pyrolysis air: CO, CO2, water vapor, phosphoric acid vapor, wood gas, and tar are all discharged into the atmosphere through the flue, which seriously pollutes the air and consumes a lot of energy. The cost of heating energy per ton of charcoal Between 300 and 400 yuan. Under the pressure of domestic environmental protection, vari...

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Problems solved by technology

[0007] In order to overcome the problem that the pyrolysis air generated in the activated carbon production device in the prior art can only be directly discharged into the air, the flammable gas in the pyrolysis gas cannot be effectively reused, and the water vapor in the raw material cannot be effectively removed and separated, this paper The invention provides a self-heating two-stage chemical activation furnace that achieves the removal of harmful emissions and reduces heating energy costs

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