A tamping coking method mixed with biomass

Abstract

The invention discloses a tamping and coking method for blending biomass. The dried biomass raw material is crushed, and the biomass material and the blending coal with a water content greater than 10% are evenly mixed according to 0.25-1% of the mass of the blended coal, and then conventionally The briquettes are rammed into briquettes, and the resulting briquettes are routinely sent to the coking chamber of the coke oven for coking. The invention greatly reduces the phenomenon of peeling and collapse of briquettes in the production process, and effectively improves the operation efficiency of coke oven production. After the coke oven is applied with the present invention, the peeling and collapse rate of coal cakes are reduced from more than 10% to less than 1%. Coke oven production operation coefficient K3 increased from below 30% to over 90%.

Description

technical field [0001] The invention relates to a tamping coking method mixed with biomass, which belongs to the technical field of coal chemical industry. Background technique [0002] Bituminous coal is heated to 950-1050°C in the absence of air, and finally supports coke through stages such as drying, pyrolysis, melting, bonding, solidification, and shrinkage. This process is called high-temperature coking. The coke obtained by high temperature coking is used for blast furnace smelting, casting and gasification. The recovered and purified coke oven gas produced in the coking process is not only a fuel with high calorific value, but also an important industrial raw material for organic synthesis. Others such as pure benzene, toluene, xylene, industrial naphthalene and coal tar are also important chemical raw materials. [0003] At present, high-temperature coking mainly includes the traditional top-loading coke oven coking and the side-loading tamping coking that has bee...

AI Technical Summary

Problems solved by technology

[0004] Although tamping coking has many advantages, its disadvantages are also very prominent compared with top-charging coke oven coking

In addition to complex production equipment and strict environmental protection control requirements, coal cakes often peel and collapse during the production process, which seriously affects the normal production level of coke ovens.

[0005] Coal collapse on the side of the machine will increase the residual coal at the furnace mouth, increase the labor workload of the workers, and the on-site sanitation environment is poor; during the coal loading process, no matter whether the machine side collapses or the coke side collapses, the residual coal at the furnace mouth needs to be disposed of after coal loading, which requires consumption For a certain period of time, this increases the operating time of a single furnace and reduces the coke oven production operation coefficient K 3 , affecting normal production and maintenance; the collapse of coal makes the height of coal cakes in the carbonization chamber uneven, affecting the furnace temperature and making it difficult to adjust the fire; the temperature in the carbonization chamber is uneven, which may even lead to hard-to-push coke accidents in severe cases; the side of the machine Coal collapse reduces the height of the coke cake at the furnace head of the machine after coking, and the contact area between the coke cake and the coke pushing rod head is small. Difficult to push coke accidents; coal collapse causes insufficient coal cake height at the furnace mouth on the side of the machine, which increases the head space of the carbonization chamber and increases the temperature. The pyrolyzed gas stays in this area for an increased time, and secondary cracking reactions occur at high temperatures , and then cause a large amount of graphite to be generated on the top of the carbonization chamber and the inner wall of the ascending pipe, which may seriously cause a series of problems such as difficulty in pushing coke cake, poor export of raw gas, and difficulty in coal loading, which brings many troubles to normal safety and production.