Calcium carbide production system and method capable of cyclically utilizing pyrolysis gas

Abstract

The invention relates to a calcium carbide production system and method capable of cyclically utilizing pyrolysis gas. The system comprises an adjustable pyrolysis furnace, an oxygen-heat-process calcium carbide furnace oxygen lance and a natural gas-oxygen spraying lance; the adjustable pyrolysis furnace comprises a limestone powder feeding hole, a coal powder feeding hole, a discharging hole, a flue gas inlet and a pyrolysis gas outlet; a hearth of the adjustable pyrolysis furnace is internally provided with a baffle with an adjustable inclined angle; a gap is reserved between the baffle and an inner wall of the adjustable pyrolysis furnace; small holes are formed in the baffle; an oxygen-heat-process calcium carbide furnace comprises a feeding hole, a flue gas outlet and a discharging hole; a spraying lance head of the oxygen lance is arranged in the oxygen-heat-process calcium carbide furnace; a spraying lance head of the natural gas-oxygen spraying lance is arranged in the oxygen-heat-process calcium carbide furnace. According to the calcium carbide production system and method capable of cyclically utilizing the pyrolysis gas, the baffle with the adjustable inclined angle is arranged in the adjustable pyrolysis furnace, so that reaction time of raw materials in the furnace can be conveniently controlled, and reaction degree and efficiency of the raw materials are guaranteed.

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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