Heat exchanger for semicoke residual heat utilization

Abstract

The invention relates to a heat exchanger for semicoke residual heat utilization and belongs to the field of semicoke processing equipment. The heat exchanger comprises an annular external upper header (10) and a plurality of annular external lower headers (2), wherein N connecting pipes (13) are uniformly arranged along the length direction of the external upper header (10), the two ends of each connecting pipe (13) are fixedly connected and communicated with the two long sides of the external upper header (10) respectively, and the external upper header (10) and the connecting pipes (13) jointly form N+1 rectangular rings; the external lower headers (2) are arranged just below the rectangular rings, the rectangular rings and the corresponding external lower headers (2) are fixedly connected and communicated through a plurality of external heat exchange pipes (11), a heat conducting baffle (8) is fixedly arranged between every two adjacent external heat exchange pipes (11), so as to enclose N+1 semicoke flow passages, and a material guiding device is arranged at an inlet of each semicoke flow passage. The heat exchanger has the advantages of semicoke dry-distillation, blowdown efficient-cooling, residual heat recovery, uniformity in semicoke blanking, uniformity in heat exchange and the like.

Description

technical field [0001] A semi-coke waste heat utilization heat exchanger belongs to the field of semi-coke processing equipment. Background technique [0002] Semi-coke is a solid material with high fixed carbon content produced by medium and low temperature dry distillation process, which is made of Jurassic non-caking coal and weakly caking coal. It has high fixed carbon, high specific resistance, high chemical activity, and multiple specific surface area. , good thermal stability and ultra-low ash, ultra-low sulfur, ultra-low phosphorus and other characteristics, widely used in production and living fields such as calcium carbide, ferroalloy, fertilizer gas production, blast furnace injection, and clean coal for urban residents. In recent years, semi-coke has developed rapidly due to its excellent characteristics, and it is one of the effective ways for comprehensive utilization of coal conversion in western my country. [0003] At present, medium and low temperature ret...

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Problems solved by technology

The above-mentioned water-cooled coke quenching has the following problems: (1) The temperature of the semi-coke pushed out from the carbonization chamber is about 550°C, and the sensible heat of the semi-coke is completely wasted during wet quenching; (2) The semi-coke is easily broken when it is quenched by water (3), the scraper machine sends the semi-coke to the gas dryer for drying, which consumes a lot of gas; (4), consumes a lot of water resources; (5), wet quenching process When red or blue charcoal encounters water, a large amount of organic gases and steam are generated, which are directly discharged into the atmosphere and pollute the environment.

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