Energy-saving return and utilization device for carbonization furnace flue gas

Abstract

The invention relates to an energy-saving return and utilization device for carbonization furnace flue gas. The energy-saving return and utilization device for the carbonization furnace flue gas comprises a flue gas return flue, a supporting frame, an ash removal opening, an axial flow fan, a combustor and an existing carbonization production line device, the existing carbonization furnace comprises a carbonization furnace main body, a combustion chamber, an incineration chamber, a mixing chamber and the like, the combustor comprises a nozzle and a combustor body which is arranged on the nozzle in a sleeving mode, the combustor body sequentially comprises an injection section, a mixing section, a combustion section and a flame stabilizing section which communicate with one another, an airinlet is formed in one end, which is connected with the nozzle, of the injection section, and an air adjusting plate for changing the size of the air inlet is correspondingly arranged. According to the energy-saving return and utilization device for the carbonization furnace flue gas, combustible gas in the incineration chamber is adopted, the high-temperature axial flow fan is used for returninghigh-temperature flue gas to a furnace end, additional fuel supplementation to the furnace end is avoided, effective recycling of the high-temperature flue gas is achieved, efficient utilization of energy is achieved in the whole process, waste gas pollution and resource waste are reduced, the device is more energy saving and environmental friendly, and the temperature is convenient to adjust andcontrol, so that the quality and the yield of an activated carbon product is obviously improved.

Description

technical field [0001] The invention relates to the field of energy-saving devices, in particular to an energy-saving return utilization device for flue gas from a carbonization furnace. Background technique [0002] In the activated carbon preparation industry, the carbonization furnace is a device that increases the carbon content in the raw coal and cultivates a pore structure that can be formed during the activation process. The carbonization process is one of the decisive factors affecting the performance of activated carbon products. [0003] What happens in the carbonization furnace is a low-temperature carbonization process in which the raw coal is separated from the air and heated to 550°C~650°C. In this process, the high-temperature hot gas generated by the combustion in the combustion chamber makes the carbonization furnace form a stepped temperature from the furnace head to the furnace tail. Meet the carbonization temperature requirements. The flue gas produced...

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Problems solved by technology

[0005] At present, some carbonization furnaces also adopt the scheme of using the return flue gas as supplementary heat, but due to the high carbon content in the return flue gas, the equipment maintenance in these schemes is very difficult, and these schemes cannot make good use of the return flue gas heat, which actually causes additional energy loss

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