Continuous phosphoric acid method external heating type flat activation furnace

Abstract

A continuous phosphoric acid method external heating type flat activation furnace is disclosed. A main body of the furnace is in a cuboid shape, a cuboid heating chamber is built by refractory bricks, and an activating material plate is laid at the upper part of the heating chamber; an activation chamber is arranged above the activated material plate; a feeding hopper is arranged at one end of the top of the activation chamber; an annular chain plate conveying mechanism for conveying activation materials is arranged in the activation chamber, a transmission shaft is arranged between activation chamber shells on the two sides, chain plate supporting chain wheels are installed at the two ends of the transmission shaft, a transmission chain is installed on the chain plate supporting chain wheels, chain plates are installed on the transmission chain, and scraping plates perpendicular to the chain plates are welded to the chain plates; a discharge chute is arranged outside the heating chamber and below the discharge hole of the activation chamber, and a discharge screw is mounted in the discharge chute; an activated tail gas exhaust port is formed in the position close to the feeding hopper; three temperature thermocouples are respectively arranged at the bottom of the activation chamber and close to two ends and two sides of the middle part; a flue gas exhaust port is formed in the end, provided with the feeding hopper, of the heating chamber; and insulating layers are arranged at the bottom and the periphery of the heating chamber and the top and the periphery of the activation chamber.

Description

technical field [0001] The invention relates to equipment for chemically preparing activated carbon, in particular to a continuous phosphoric acid process external heating flat plate activation furnace. Background technique [0002] At present, the activation process of activated carbon produced by phosphoric acid method is as follows: the raw material sawdust and activator phosphoric acid solution are mixed and kneaded evenly, and then added to the internal heating rotary activation furnace, and the flue gas produced by fuel combustion is passed into the rotary activation furnace for heating. Sawdust phosphoric acid mixture, flue gas and sawdust phosphoric acid mixture move in reverse and contact directly, harmful components in the flue gas such as dust, tar and sulfur oxides will pollute the activated material and increase the ash content of activated carbon products , affecting the quality of activated carbon products; in addition, the stockpiling area per unit length of ...

AI Technical Summary

Problems solved by technology

[0002] At present, the activation process of activated carbon produced by phosphoric acid method is as follows: the raw material sawdust and activator phosphoric acid solution are mixed and kneaded evenly, and then added to the internal heating rotary activation furnace, and the flue gas produced by fuel combustion is passed into the rotary activation furnace for heating. Sawdust phosphoric acid mixture, flue gas and sawdust phosphoric acid mixture move in reverse and contact directly, harmful components in the flue gas such as dust, tar and sulfur oxides will pollute the activated material and increase the ash content of activated carbon products , affecting the quality of activated carbon products; in addition, the stockpiling area per unit length of the rotary activation furnace is small. To achieve a larger output, the rotary cylinder must be made very long, some as long as 30 meters, and the weight of the internal heat rotary activation furnace Large, the drive motor consumes a lot of energy

The existing flat-plate activation furnace is intermittent feeding and intermittent activation, which requires manual feeding and manual turning, and the labor intensity is relatively high. Moreover, the activation tail gas escapes to the production workshop, polluting the environment in the production area

An activation furnace similar to external heating has a patent application number of 200910009778.8 "External Heating Vertical Activated Carbon Activation Furnace", which is characterized in that the activation furnace has an inner cylinder and an outer cylinder, and the activation zone is between the inner cylinder and the outer cylinder. In the area, the outer side of the inner cylinder and the inner side of the outer cylinder are arranged with staggered copying boards with hollow interlayers, and high-temperature combustion gas for heating is introduced into the interlayer of the copying boards, and the rotating outer cylinder drives the copying boards to rotate. It makes the material move from top to bottom, and conducts heat energy to the material to be activated through the wall of the copy board. It has the following disadvantages: First, it needs to drive the entire outer cylinder to rotate, requiring a large power of the driving motor and high energy consumption. The second is that due to the large spacing between the copying boards, the materials between the copying boards are full of materials, and the material layer is relatively thick. It is heated by the high-temperature flue gas in the hollow interlayer copying boards, the heating speed is slow, the material temperature is uneven, and the activation effect is low. Inhomogeneous; the patent application number is 201820056146.1 "An external heating activation furnace for activated carbon produced by chemical method". The high-temperature flue gas and acidic materials directly contact the activation disc, which requires high temperature resistance and corrosion resistance

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