Method for applying membrane oxygen enrichment technology in roller kiln

Abstract

The invention discloses a method for applying the membrane oxygen enrichment technology in a roller kiln, which is realized through the technical scheme: air is pumped by air input blower through a filter into an oxygen enrichment membrane device, and is transformed into oxygen enriched air under the action of pressure difference; the oxygen enriched air is sent by an air pump to a gas-water separation system and a dehumidification system, then enters a pressure stabilizing system, and finally after being preheated by a heater is sent by an oxygen enrichment nozzle to the upper layer and the lower layer of the manufactured ceramic tile; combustible gas is taken as fuel; the air input direction of the gas fuel is vertical to the air input direction of the oxygen enriched air; the gas fuel is distributed in burner high-speed injection kilns on two sides of the kiln body; and thermocouples distributed in different box bodies are used for testing the temperature in the kiln furnace when necessary, and sending signals to an adjustor which makes comparison between the signals and data set in advance, and issues instructions to an electric actuator to control the divergence of a combustible gas adjusting valve, thereby adjusting the feeding amount of the combustible gas to ensure that the temperature in the kiln remains at the required level.

Description

technical field [0001] The invention relates to the field of ceramic production, and more specifically relates to a method for applying membrane oxygen enrichment technology in a roller kiln. Background technique [0002] Roller kiln is a key equipment commonly used in the field of ceramic production. It generally adopts a double-layer kiln type, with heat-resistant rollers radiating in the middle, and transmission methods include chain drive, gear drive, etc. Controlling the combustion of roller kilns is directly related to the quality of ceramic products, the amount of energy consumed and the impact on the environment. Since the oxygen in ordinary air only accounts for 20.94%, and nitrogen accounts for 78.09%, the oxygen content in high altitude areas is even lower. To improve the combustion efficiency, a large amount of combustion-supporting air needs to be introduced during the combustion process, but only about 1 / 5 of the total air is actually involved in the combustion...

AI Technical Summary

Problems solved by technology

Membrane oxygen enrichment technology has simple equipment, convenient operation, safety, fast start-up, no pollution to the environment, and remarkable energy-saving effect. Driven by the driving force, oxygen can pass through the membrane preferentially, so as to obtain oxygen-enriched air with high oxygen concentration and relatively low nitrogen content, which can be added to the combustion system to improve combustion efficiency. Existing applications, because the production of ceramics in roller kilns has relatively strict requirements on combustion conditions and temperature distribution, so the successful application of membrane oxygen enrichment technology in roller kilns has not been reported or published

The existing roller kiln adopts the membrane method to enrich oxygen, and there are the following problems: after using oxygen-enriched air, the pressure of the combustion-supporting air inlet decreases, and the air flow in the kiln is weakened, resulting in slow transfer of heat generated by combustion in the roller kiln. The heat transfer efficiency of the furnace gas to the product is low, which is not conducive to the formation of a regular and controllable temperature gradient in the longitudinal direction of the firing zone in the kiln, and the firing cycle is prolonged; due to the small air flow in the roller kiln and the large lateral temperature difference in the kiln, the produced The product size deviation is large, which is not conducive to quality control

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