Primary dust remover for dry quenching
A dust collector and coke dry quenching technology, which is applied in coke ovens, coke cooling, chemical instruments and methods, etc.
Inactive Publication Date: 2013-10-23
北京信力筑正新能源技术股份有限公司 +1
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the above shortcomings of the existing gravity dust collector to ensure long-term stable operation of the CDQ system
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[0009] CDQ technology uses inert gas to exchange heat with hot red coke in a dry quenching furnace to cool red coke. The inert gas that has absorbed the heat of red coke transfers the heat to the waste heat boiler to generate steam, and the cooled inert gas is blown into the dry quenching furnace by the circulation fan for recycling, and the generated steam is incorporated into the steam pipe network in the plant or sent to generate electricity. The technological process of CDQ is as follows: the red hot coke produced by the coke oven with a temperature of about 1000℃ is discharged into the coke tank, the coke tank is pulled and lifted and transferred to the upper part of the quenching tank, and the coke is put into the CDQ from the coke charging port The pre-storage room, after a period of pre-storage, goes down to the coke quenching room, and the countercurrent inert gas N 2 After heat exchange, the cooled coke is discharged to the belt through the coke discharge device and ...
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The invention provides a primary dust remover for dry quenching and belongs to the technical field of primary dust removers for afterheat power generation dry quenching items of the metallurgical industry. The aims of improving the dust removal efficiency, reducing the temperature of smoke to protect an afterheat boiler overheater and reducing the circulating amount of N2 are fulfilled by changing an inner structure of the primary dust remover. According to an improving method, 1, the number of smoke barrier walls is changed from one to two, the number of times of rotating the smoke is increased, and the dust removal efficiency is improved, so that the efficiency of the primary dust remover is improved from about 18 percent to about 30 percent, 2, the smoke barrier walls are made of water-cooling screens instead of pouring materials; the water-cooling screens consist of lower containers, upper containers and evaporating pipe bundles; a descending pipe guides water in a boiler barrel of the afterheat boiler to the lower containers, a rising pipe guides steam-water mixers in the upper containers to the boiler barrel; the evaporating pipe bundles are connected with the upper containers and the lower containers; the water-cooling screens are used for changing the flowing direction of the smoke and producing steam to reduce the temperature of the smoke; and therefore, the temperature of the smoke is reduced from about 900 DEG C to about 750 DEG C.
Description
Technical field: [0001] The invention relates to the technical field of a primary dust collector used in waste heat power generation CDQ projects in the metallurgical industry. Specifically, the purpose of improving dust removal efficiency and reducing flue gas temperature is achieved by changing the internal structure of the primary dust collector. Background technique: [0002] The commonly used primary dust collector is a gravity dust collector. The primary retaining wall in the dust collector is made of high temperature and erosion resistant materials, and its dust removal efficiency is about 15%-20%. In this way, the flue gas entering the waste heat boiler still contains a large amount of coke. Powder (about 10g / m 3 or so), these coke powders severely scour the superheated steam tube of the boiler at a relatively high temperature (800-900°C) and flow rate (8.5-7.5m / s). Second, the flue gas temperature at the superheater of the waste heat boiler is too high, which may e...
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IPC IPC(8): C10B39/02C10B43/00B01D45/06B01D45/02
CPCY02P20/129
Inventor 杨昭平曹玉英李志海
Owner 北京信力筑正新能源技术股份有限公司