• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In pneumatic low pressure dust extraction apparatus, filter bags are cleaned by reverse flow of air. Each cleaning operation includes a first shock phase of short duration (not longer than 0.05 sec) but at high flow intensity by which accumulated layers of dust are thrown off the outside of the bag, followed by a rinsing phase of greater duration (not longer than 1 sec e.g. 0.20-0.30 sec) but at lower flow intensity during which remaining dust is blown out of the filter cloth and the cloth is allowed to lie back gradually on its support. The apparatus includes a cleaning-air tank incorporated in the filter housing for storage of compressed air in the close vicinity of apertures of the filter bags. The height of the tank exceeds its distance from the bag apertures. There is a valve for each filter bag and it has delivery means extending into the region of the bag aperture. The duration of the reverse flow for cleaning is adjustable for obtaining optimum results suited to the operating conditions. And the intervals of time between consecutive cleaning operations are adjustable for achievement of maximum economy.
    公开号:SU1068020A3
    申请号:SU782634496
    申请日:1978-07-12
    公开日:1984-01-15
    发明作者:Борст Виллибальд
    申请人:Гебрюдер Бюлер Аг (Фирма)；
    IPC主号:
    专利说明:


    00
    about
    1che
    This invention relates to methods for cleaning bag filters in a countercurrent dust collecting unit.
    The known method of regeneration of bag filters in the dust collecting unit, including countercurrent blow with a shock air flow 1J
    However, this method does not provide sufficient blowing efficiency, as each filter hose is loaded separately: which leads to uneven cleaning.
    The purpose of the invention is to increase the degree of purification.
    The goal is achieved by the fact that, according to the method of regeneration of bag-type filtrates in a sequestering installation that includes countercurrent blowdown with a shock air flow, it is additionally carried out immediately following an impact flow purge with a reduced air pressure in the filter 2-6 times, the duration of the impact air stream is It is less than 0.1 s, and the total regeneration time is less than 1 s,
    The method is carried out as follows.
    The method includes a shock flow phase with the immediately following purge phase, the shock flow phase includes removing the dust layer from the filter due to a sudden short-term supply of backflow of air.
    filter should be slowly relaxed and placed on the frame again. At this time, the dust particles in the fabric are exhausted; 1 and blown out of the fabric by the subsequent purge flow. The duration of the next blow should be from 3 to 20 times longer the duration of the subsequent purge is 3-7.5 times, and the average pressure in the filter during the purge is 2-6 times less than the pressure of the first pneumatic impact.
    Thus, the regeneration method includes a shock pressure increase to prepare a countercurrent blow, a short-term peak pressure, a somewhat slower transition to the phase, and it is important here that the direction of air movement from the filter to the outside is maintained, and the pressure in the filter so that the return of the air flow from the countercurrent blow to the normal dust cleaning occurs smoothly, the filter cloth is adjacent to the frame and takes the form bent inward. The whole process is countercurrent. The blowout is very short and usually lasts less than 1 s, preferably less than 1/2 sec.
    The economic effect is sufficient due to ensuring perfect cleaning.
    权利要求:
    Claims (1)
    [1]
    (57I METHOD FOR REGENERATING HOSE FILTERS in a dust collecting unit, comprising countercurrent purging by shock air flow, characterized in that, in order to increase the degree of purification, additional purging immediately following the shock flow is carried out with air pressure in the filter reduced by 2-6 times, while the duration of the shock air flow is less than 0.1 s, and the total regeneration duration is less than 1 s.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1068020A3|1984-01-15|Method for regenerating bag filters
    US6786946B2|2004-09-07|Dust collector with assembly of cylindrical and hexahedral bag filter
    US3053031A|1962-09-11|Sonic cleaning of dust filters
    US3256679A|1966-06-21|Apparatus for dust collection
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    RU2063786C1|1996-07-20|Nozzle filter
    SU902791A2|1982-02-07|Apparatus for cleaning air from dust
    KR950005317Y1|1995-07-06|Bag filter cleaner
    同族专利:
    公开号 | 公开日
    SE426914B|1983-02-21|
    BR7804539A|1979-03-06|
    CH625969A5|1981-10-30|
    ES479007A1|1980-06-16|
    ES471658A1|1979-10-01|
    US4433986A|1984-02-28|
    IT7825084D0|1978-06-28|
    US4247310A|1981-01-27|
    GB1605075A|1981-12-16|
    FR2397219A1|1979-02-09|
    FR2397219B1|1984-01-27|
    SE7807799L|1979-01-16|
    AR216679A1|1980-01-15|
    JPS5421682A|1979-02-19|
    ZA783999B|1979-07-25|
    DE2754757A1|1979-01-25|
    GB1605074A|1981-12-16|
    IT1097291B|1985-08-31|
    DE2754757B2|1979-08-23|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH878677A|CH625969A5|1977-07-15|1977-07-15|
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