Dual-injection type injecting and dust-removing device and process

Abstract

The invention discloses a dual-injection type injecting and dust-removing device and process. The dual-injection type injecting and dust-removing device comprises two injection gas transmission pipes and an injection pipe, wherein one injection gas transmission pipe is connected to an upper nozzle which is formed in the upper part of a filter cartridge of a dust remover; the other injection gas transmission pipe is connected to a lower nozzle which is formed in the lower part of the filter cartridge of the dust remover; the injection gas transmission pipe for supplying gas to the lower nozzle is connected to a dust-containing gas inlet pipeline of the dust remover; the injection gas transmission pipe for supplying the gas to the upper nozzle is connected to a gas outlet pipe of a gas purification chamber of the dust remover or an external gas supply device; the temperatures in the injection gas transmission pipes are controlled to be 350-750 DEG C; the pressures in the injection gas transmission pipes are controlled to be 0.5-2.5MP; the two injection gas transmission pipes are used for injecting alternately; the ratio of the injection times of the upper nozzle to the injection times of the lower nozzle is 1 to (0.5-4). By adopting the combined manners of internal injection and back blowing as well as external injecting and peeling at the bottom of the filter cartridge of the dust remover and controlling the selection of injection temperature and injection manners, the working efficiency of the device is improved and the operation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of jet dedusting equipment, and in particular relates to a double-jet jet dedusting device and a process thereof. Background technique [0002] At present, high-temperature dust-containing gases are often produced in chemical, petroleum, metallurgical and other industries. Since different processes need to remove dust from high-temperature dust-containing gases to achieve gas-solid separation and gas purification, it is often used to filter through the filter element in the dust collector. Gas-solid separation, the filtered and purified dust-containing gas enters the clean air chamber, the dust is filtered and left in the dust removal chamber of the dust collector, and deposited into the ash hopper, and the filter element used in the dust collector will absorb a large number of particles on its outer surface during the dust removal process Dust, as the dust continues to increase, it will affect the filtratio...

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Problems solved by technology

[0002] At present, high-temperature dust-containing gases are often produced in chemical, petroleum, metallurgical and other industries. Since different processes need to remove dust from high-temperature dust-containing gases to achieve gas-solid separation and gas purification, it is often used to filter through the filter element in the dust collector. Gas-solid separation, the filtered and purified dust-containing gas enters the clean air chamber, and the dust is filtered and left in the dust removal chamber of the dust collector and deposited into the ash hopper, while the filter element used in the dust collector will absorb a large number of particles on its outer surface during the dust removal process Dust, as the dust continues to increase, it will affect the filtration quality, so it is necessary to remove the dust accumulated on the surface of the filter element. Now the blowing pipe is commonly used to achieve reverse cleaning, but the result of back blowing will inevitably make the purified air again. Entering the space before purification, since the amount of purification gas used for each injection is relatively large, the second filtration can only be repurified, which is not conducive to improving work efficiency, and it is necessary to increase the gas pressure boosting equipment

In addition, because the tubular nozzle can only clean the part of the filter element corresponding to the nozzle, the nozzle cannot change the direction of the blowback, and there are dead corners during the nozzle that are not easy to clean, and the unfavorable accumulation of the nozzle will become more solid and difficult to remove, so it cannot be easily cleaned. Good and thorough dust removal; some manufacturers also design to use mechanical dust removal devices, such as installing brushes at the front of the manipulator, or mechanical oscillation methods, but not only the structure is complicated, but also the filter element of the dust collector is easy to be damaged due to poor action consistency, and the dust enters after the filter element is damaged. The clean air chamber of the dust collector will bring the polluted and purified gas into the subsequent process, causing great losses

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