Online regeneration method of filter element of dust remover for filtering high-temperature combustible dust

Abstract

The invention discloses an online regeneration method of a filter element of a dust remover for filtering high-temperature combustible dust. The online regeneration method comprises a step of poor oxygen combustion of oxygen-poor gas sent to the outside of the filter element of the dust remover and combustible dust on the filter element of the dust remover. The oxygen content of the oxygen-poor gas is 2-17 percent, and the poor oxygen combustion step and a step of back-blow dedusting of the filter element of the dust remover are alternated. The method breaks through the limit of a traditional back-blow dedusting process, realizes online regeneration of the filter element by combination of a poor oxygen combustion technology and a back-blow dedusting measure, and can thoroughly clear blind angles of dust accumulation on the surface of the filter element so as to improve the filtering efficiency of the filter element and prolong the service life of the filter element. The online regeneration method has the advantages of being reasonable in design, low in cost and long in operation cycle, the filter element is high in regenerability and high in filtering efficiency and has good promotion and use values, equipment is safe and reliable, and the operation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of dedusting filter cores of dust collectors, and in particular relates to an online regeneration method for filter cores of dust collectors used in high-temperature combustible dust environments. Background technique [0002] At present, my country is short of oil and natural gas resources, and coal will remain the most important primary energy source for a long time to come. However, there are many problems and challenges in the process of coal conversion and utilization, such as low comprehensive utilization efficiency, serious environmental pollution, shortage of water resources, and large carbon dioxide emissions. Therefore, it is an inevitable choice for the development of my country's energy industry to develop coal efficient and clean comprehensive utilization technology to achieve energy conservation and emission reduction. The "Twelfth Five-Year Plan" for the development of clean coal technology a...

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Problems solved by technology

In the current dry dust removal process, it is most common to use a dust bag as a fine dust collector. However, since the normal working temperature that the dust bag can withstand is usually much lower than the temperature of the gas to be dusted, it is difficult to transform. In addition, the filter tube structure is used for The high-temperature dust-containing gas is subjected to dust removal and filtration to realize gas-solid separation and gas purification. The filtered and purified dust-containing gas enters the clean air chamber, and the dust filter stays in the dust removal chamber of the dust collector and deposits in the ash hopper, while the filter element used for the dust collector During the process of filtering and dust removal, the outer surface will absorb a large amount of particle dust. As the dust continues to increase, it will affect the filtration quality. Therefore, it is necessary to remove the dust accumulated on the surface of the filter element. Some manufacturers design and use mechanical dust removal devices, such as the front end of the manipulator. Install brushes, 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 consistency of action. After the filter element is damaged, the dust enters the clean air chamber of the dust collector, which will pollute the purified gas and bring it into the subsequent process, causing great harm. loss

Nowadays, the blowing pipe is widely used to achieve reverse cleaning, but the shape of the nozzle and the rupture position of the high-pressure expansion zone formed by the blowing gas entering the filter element are different during back blowing, resulting in dead angle positions that are difficult to remove for multiple back blows. In the lower part of the filter element, it is difficult to remove the dust attached to the filter element, which will inevitably affect the filtration quality, and it is prone to vibration caused by uneven airflow. However, if the filter element is removed for cleaning, it will inevitably require shutdown, production stoppage, cumbersome disassembly and debugging, and a large workload. And the utilization rate of equipment is low, affecting normal production

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