Furnace tube fixed type gas-heating regeneration furnace for powdered activated carbon

Abstract

The invention provides a furnace tube fixed type gas-heating regeneration furnace for powdered activated carbon. The regeneration furnace comprises a regeneration furnace body, a regeneration furnacestirring device, a powdered activated carbon recovery device, an exhaust gas emission system and a gas heating system, wherein the regeneration furnace body stirring device is arranged in the regeneration furnace body; an outlet of the regeneration furnace body is connected to the powdered activated carbon recovery device through a regeneration waste gas flue and a powdered activated carbon material outlet of the recovery device; the regeneration furnace body is connected with the exhaust gas emission system through a flue branch pipe; the gas heating system 5 is arranged in the regeneration furnace body; and the upper side of the regeneration furnace body is connected with the powdered activated carbon recovery device through the regeneration waste gas flue. According to the invention, afurnace tube fixed type structure is adopted, only the stirring shaft is required to perform rotational motion, and required rotation power is low; fixing equipment for a furnace tube of the furnace body has characteristics of simple structure and reliable installation; and the furnace is long in service life and convenient in maintenance.

Description

technical field [0001] The invention relates to the technical field of powdered activated carbon regeneration, in particular to a gas-heated powdered activated carbon regeneration furnace with fixed furnace tubes. Background technique [0002] At present, there are two methods for the regeneration of powdered activated carbon. One is to use the smoldering method for regeneration in earthen pots, that is, to use an earthen pot to put the saturated powdered activated carbon into the earthen pot, and then to stack the earthen pots in a certain form. Palletizing is done in an earthen kiln, using wood, sawdust, coal and other combustion media to heat the earthen pots in the stacking. Although this process is simple, the regeneration temperature is uneven, the heat preservation effect is relatively poor, and the temperature difference between high and low temperatures is large. . Because the kiln body is made of bricks and cannot be sealed, a large amount of smoke will be dischar...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two methods for the regeneration of powdered activated carbon. One is to use the smoldering method for regeneration in earthen pots, that is, to use an earthen pot to put the saturated powdered activated carbon into the earthen pot, and then to stack the earthen pots in a certain form. Palletizing is done in an earthen kiln, using wood, sawdust, coal and other combustion media to heat the earthen pots in the stacking. Although this process is simple, the regeneration temperature is uneven, the heat preservation effect is relatively poor, and the temperature difference between high and low temperatures is large.

Because the kiln body is made of bricks and cannot be sealed, a large amount of smoke will be discharged during the regeneration process, causing large-scale environmental pollution

Due to the use of natural cooling, continuous operation is not possible, resulting in low production efficiency, long production cycle and high labor intensity

The second is the external heating rotary kiln, which uses electricity or fuel for external heating. The material is heated evenly and can be produced continuously. The material of the furnace tube is made of 310S high-temperature resistant stainless steel. High-temperature sulfidation corrosion occurs under high temperature, that is, at a high temperature of 700-1000 ° C, too much σ phase is precipitated at the grain boundary, resulting in poor Cr near the grain boundary, thereby reducing the sulfur corrosion resistance of the grain boundary, and the service life is relatively short

Silicon carbide material is a ceramic sintered at high temperature. It has the characteristics of high temperature corrosion resistance and high hardness, but its shape and material size are limited. For example, the length of a silicon carbide tube with a diameter of 600mm can be up to 600mm, which cannot meet the requirements of a furnace tube with a length of 10m.

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