Filtration device with cross-flow function and its filtration method
OwnerSei-Chang Changinventor
Life of this patent
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Abstract
The present invention employs cross-flow to extend operation time of filtration devices and to increase filtration efficiency. The filtration device with cross-flow function consists of a filter, a case for containing the filter and a diffuser. There are an inlet and an outlet set on the case. The diffuser is set inside the filter along longitudinal direction. The diffuser consists of a reducing section, a throat section and a flared section for producing cross-flow so as to prevent the impurities and particles in the fluid to form cake on the inner surface of filter, so the operation time is therefore greatly increased. A drain outlet is set for adjusting the impurities and particles concentrations of the fluid inside the filter for further extending the effective operation time.
Claims6
A filtration device with a cross-flow function comprising:
- a) a case having:
- i) a case inlet;
- ii) a case outlet;
- and
- iii) at least one support;
- b) a filter located in the case;
- c) a diffuser located on an interior of the filter and having:
- i) a diffuser inlet, an end of the diffuser adjacent to the diffuser inlet being located adjacent to each of the at least one support;
- ii) a diffuser outlet;
- iii) a throat section located on an interior thereof between the diffuser inlet and the diffuser outlet;
- iv) a tapered section located on an interior thereof between the diffuser inlet and the throat section;
- and
- v) a flared section located between the located on an interior thereof between the throat section and the diffuser outlet;
- and
- d) a passage formed between an exterior of the diffuser and an interior of the filter communicating with the diffuser outlet and the diffuser inlet, such that the cross-flow function includes liquid flowing from the diffuser outlet, through the passage, and into the diffuser inlet.
A filtration method with cross-flow function, which comprises the steps of:
- a) providing a case having a case inlet, a case outlet, and at least one support;
- b) positioning a filter in the case;
- c) positioning a diffuser on an interior of the filter with the diffuser having a diffuser inlet located on an end of the diffuser adjacent to each of the at least one support, a diffuser outlet, and a throat section, a tapered section, and a flared section located on an interior thereof between the diffuser inlet and the diffuser outlet;
- d) forming a passage between an exterior of the diffuser and an interior of the filter communicating with the diffuser outlet and the diffuser inlet, such that the cross-flow function includes liquid flowing from the diffuser outlet, through the passage, and into the diffuser inlet;
- e) moving fluid from the diffuser inlet into the tapered section to produce a local low-pressure and entraining fluid flowing outside the diffuser into the tapered section, and then through the throat section;
- f) moving fluid from the throat section into the flared section gradually decreasing flow velocity and converting kinetic energy into pressure energy to form a local high-pressure region at the diffuser outlet;
- and
- g) moving fluid from the diffuser through the passage and entraining fluid back into the tapered section to form the circulating cross-flow.
Dependencies are inferred from the claim text.