A kind of production system and method of pyrolysis gas recycling calcium carbide

Abstract

The invention relates to a production system and method of calcium carbide for recycling pyrolysis gas. The system includes an adjustable pyrolysis furnace, an oxythermal calcium carbide furnace oxygen lance and a natural gas-oxygen spray lance, and the adjustable pyrolysis furnace includes a limestone powder inlet, a coal powder inlet, a material outlet, and a flue gas inlet and the pyrolysis gas outlet; the furnace of the adjustable pyrolysis furnace is provided with a baffle plate with an adjustable inclination angle, and there is a gap between the baffle plate and the inner wall of the adjustable pyrolysis furnace, and the baffle plate is arranged with Aperture; the oxythermal calcium carbide furnace includes a feed inlet, a flue gas outlet and a discharge port, the spray gun head of the oxygen lance is arranged in the oxygen thermal calcium carbide furnace, and the spray gun head of the natural gas-oxygen spray gun Set in the oxythermal calcium carbide furnace. The calcium carbide production system and method for pyrolysis gas recycling of the present invention can conveniently control the reaction time of raw materials in the furnace by setting a baffle plate with adjustable inclination angle in the adjustable pyrolysis furnace to ensure the smoothness of the raw material reaction. extent and efficiency.

Description

technical field [0001] The present invention generally relates to a calcium carbide production system and method, in particular to a calcium carbide production system and method for recycling pyrolysis gas. Background technique [0002] Calcium carbide, commonly known as calcium carbide, is produced by the reaction of coke and calcium oxide. It is an important coal chemical product and basic chemical raw material. It is mainly used in the production of acetylene and acetylene-based chemical products, including vinyl chloride series, vinyl acetate series and acrylic-based products. . Calcium carbide plays a very important role in the development of my country's national economy, and the output of calcium carbide has been increasing continuously in the past ten years. [0003] Although the calcium carbide industry has been developed for many years, the current calcium carbide production process still mainly adopts the method of electric arc heating, that is, the electric arc ...

AI Technical Summary

Problems solved by technology

The disadvantages of this technology are: it needs to use expensive block coke and lime as raw materials; use electric energy to generate heat, high power consumption and high energy cost; because the arc is almost in the center of the electric arc furnace, the utilization efficiency of the unit furnace capacity is limited and the output is low ; Due to the relatively small amount of high-temperature flue gas produced, each ton of calcium carbide produces about 400m 3 , the related heat energy is difficult to recover

The shortcoming of this technology is: need to utilize high price lump coke and lime as raw material

The main problem of the current oxythermal method is that it does not solve the problem of the block material reaction, that is, due to the small specific surface area of ​​the block material, the raw material needs to be reacted at a relatively high temperature, resulting in high production energy consumption of the system

At present, the production raw materials of the oxythermal method are still relatively expensive lump coke and limestone, which has not effectively reduced the cost of raw materials

In addition, the pyrolysis gas produced by pyrolysis has not been effectively utilized

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