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AssigneeChina University of Petroleum-Beijing
InventorsZhongli Ji, Xiaolin Wu, Honghai Chen, Liang Yang, Zhiyi Xiong
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A filter tube for high temperature gas-solid separation is provided that has a first cylinder and a second cylinder coaxially nested in the first cylinder with the first cylinder arranged so that an opening thereof faces upward, a first connection flange provided at a periphery of the opening of the first cylinder, and a circular through-hole provided at a bottom of the first cylinder. The second cylinder is nested in the first cylinder so that an opening of the second cylinder faces downward. The second cylinder has an end at an opening thereof that is hermetically connected to the circular through-hole of the first cylinder. The second cylinder has a bottom, and the bottom of the second cylinder and the opening of the first cylinder are at the same horizontal level. An annular gas passage is formed between the first cylinder and the second cylinder.
A filter tube for high temperature gas-solid separation, the filter tube comprising a first cylinder and a second cylinder coaxially nested in the first cylinder, the first cylinder being arranged so that an opening thereof faces upward, a first connection flange being provided at a periphery of the opening of the first cylinder, and a circular through-hole being provided at a bottom of the first cylinder, wherein the second cylinder is nested in the first cylinder so that an opening at an end of the second cylinder faces downward, wherein the end at the opening of the second cylinder is hermetically connected to the circular through-hole of the first cylinder, wherein the second cylinder has a bottom, and wherein the bottom and the opening of the first cylinder are at the same horizontal level, and an annular gas passage being formed between the first cylinder and the second cylinder, wherein the filter tube has a top end with a pulse-jet guiding device securely provided thereon, the pulse-jet guiding device comprises an outer cylinder with both ends thereof being penetrated through, and a guiding cone secured in the outer cylinder, the outer cylinder has an inner diameter that is the same as an inner diameter of the first cylinder of the filter tube, and a second connection flange connected to the first connection flange is provided at a bottom end of the outer cylinder, the guiding cone comprises a guiding cone body and a plurality of spiral blades provided around the guiding cone body along a circumferential direction, the guiding cone body has a big end down streamline shape and a bottom that is planar and securely disposed on a top end of the second cylinder, the guiding cone body has a bottom with a diameter that is the same as an outer diameter of the second cylinder of the filter tube, and the plurality of spiral blades have outer sides that are securely connected to an inner wall of the outer cylinder.
A filter for high temperature gas-solid separation having a filtration unit which comprises at least one filter tube provided at a tube sheet of the filter, the tube sheet hermetically divides the filter into an upper clean gas chamber and a lower dusty gas chamber, an ejector and a pulse-jet pipeline corresponding to the ejector are provided above the filtration unit, the pulse-jet pipeline has one end that is communicated with a pulse-jet gas tank through a pulse-jet valve and another end that is provided with a nozzle opposite to a top of the ejector, wherein the filter tube comprises a first cylinder and a second cylinder coaxially nested in the first cylinder, wherein the first cylinder is arranged so that an opening thereof faces upward, a first connection flange is provided at a periphery of the opening of the first cylinder, and a circular through-hole is provided at a bottom of the first cylinder, the second cylinder is nested in the first cylinder so that an opening of the second cylinder faces downward, the second cylinder has an end at the opening that is hermetically connected to the circular through-hole of the first cylinder, the second cylinder has a bottom, and the bottom and the opening of the first cylinder are at the same horizontal level, and an annular gas passage is formed between the first cylinder and the second cylinder, wherein the filter tube has a top end with a pulse-jet guiding device securely provided thereon, the pulse-jet guiding device comprises an outer cylinder with both ends thereof being penetrated through, and a guiding cone secured in the outer cylinder, the outer cylinder has an inner diameter that is the same as an inner diameter of the first cylinder, a second connection flange is connected to the first connection flange of the filter tube at a bottom end of the outer cylinder, the guiding cone comprises a guiding cone body and a plurality of spiral blades provided around the guiding cone body along a circumferential direction, the guiding cone body has a big end down streamline shape, a bottom that is planar and securely disposed on a top end of the second cylinder, and the bottom of the guiding cone body has a diameter that is the same as an outer diameter of the second cylinder of the filter tube, the plurality of spiral blades have outer sides that are securely connected to an inner wall of the outer cylinder.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
By acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter: with pressurised gas, e.g. pulsed air
Casings; Housings; Frame constructions: mounting of filtering elements within casings, housings or frames
For feeding: provoking a tangential stream
Characterised by the physical shape or structure of the filtering element: filter candles
About 7 years 5 months of term left · ends 4 Apr 2034 (estimated)
This application is a continuation of International Application No. PCT/CN2013/070709, filed on Jan. 18, 2013, which claims priority to Chinese Patent Application No. 201210517544.6, filed on Dec. 5, 2012, both of which are hereby incorporated by reference in their entireties.
The present invention relates to a gas-solid separation element and device, and particularly, to a sintered metal filter tube and its filtration device.
In the chemical industry, petroleum, metallurgy and electricity, high temperature dusty gases are usually generated. Since various processes need to recover the energy and reach the environmental protection discharge standard, dust removal shall be done to the high temperature dusty gases. The high temperature dust removal is a technology that directly performs a gas-solid separation under high temperature to purify the gas, which can furthest utilize the sensible physical heat, the potential chemical heat and the kinetic force of the gas and improve the energy utilization rate, while simplifying the technological processes and saving the device investment.
The following accompanied drawings only intend to exemplarily describe and explain the present invention, rather than limiting the scope of the present invention. In which,
FIG. 1 is a structure diagram of a filter according to the present invention;
FIG. 2A is a structure diagram of a filter tube according to the present invention;
In order to understand the technical features, objects and effects of the present invention more clearly, the embodiments of the present invention are described with reference to the accompanied drawings.
As illustrated in FIG. 1, the present invention proposes a filter 100 for high temperature gas-solid separation, a tube sheet 3 of the filter is provided with a filtration unit which includes at least one filter tube 2, and the tube sheet 3 hermetically divides the filter into an upper clean gas chamber and a lower dusty gas chamber; an ejector 4 and a pulse-jet pipeline 7 corresponding to the ejector 4 are provided above the filtration unit, one end of the pulse-jet pipeline 7 is communicated with a pulse-jet gas tank 9 through a pulse-jet valve 8, the other end of the pulse-jet pipeline 7 is provided with a nozzle 6 opposite to the top of the ejector 4, the dusty gas chamber is provided with a gas inlet 1, and the clean gas chamber is provided with a gas outlet 5; as illustrated in FIGS. 2A and 2B, the filter tube 2 of the present invention is a sintered metal filter tube; the filter tube 2 comprises a first cylinder 21 and a second cylinder 22 coaxially nested in the first cylinder 21; the first cylinder 21 is arranged such that an opening thereof faces upward, a periphery of the opening of the first cylinder 21 is provided with a first connection flange connected to the tube sheet 3, and a center of the bottom of the first cylinder 21 is provided with a circular through-hole; the second cylinder 22 is nested in the first cylinder 21 such that its opening faces downward; an end at the opening of the second cylinder 22 is hermetically connected to the circular through-hole of the first cylinder 21; the bottom of the second cylinder 22 and the opening of the first cylinder 21 are at the same horizontal level (i.e., the first cylinder 21 and the second cylinder 22 have the same height); an annular gas passage 23 is formed between the first cylinder 21 and the second cylinder 22; further, as illustrated in FIGS. 2A, 2C and 2D, in this embodiment, a pulse-jet guiding device is securely provided at the top of the filter tube 2; the pulse-jet guiding device includes an outer cylinder 24 with both ends thereof being penetrated through, and a guiding cone 25 secured in the outer cylinder 24; the inner diameter of the outer cylinder 24 is the same as the inner diameter of the first cylinder 21 of the filter tube, and the bottom of the outer cylinder 24 is provided with a second connection flange connected to the first connection flange of the filter tube; the outer cylinder 24 is used to concentrate the pulse jet gas so that it enters the filter tube; the guiding cone 25 includes a guiding cone body 251 and a plurality of spiral blades 252 uniformly provided around the guiding cone body 251 in the circumferential direction; the guiding cone body 251 has a big end down streamline shape (e.g., bullet shape), which facilitates guiding the pulse-jet gas stream into the filter tube; the bottom of the guiding cone body 251 is planar and securely provided on the top of the second cylinder 22, so as to prevent the pulse-jet gas from directly acting on the weak position of the top of the filter tube (i.e., the top of the second cylinder 22) and causing a strike on the filter tube; the bottom diameter of the guiding cone body 251 is the same as the outer diameter of the second cylinder 22 of the filter tube; the outer sides of the plurality of spiral blades 252 are securely connected to the inner wall of the outer cylinder 24 (in a tangential connection); thus the flow-through region of the blades 252 is just axially and oppositely overlapped with the annular gas passage 23 of the filter tube, so that the filtered gas and the pulse-jet gas can pass the flow-through region of the blades.
When the filter of the present invention is used for dust removal, the dusty gas enters the dusty gas chamber of the filter from the gas inlet 1 of the filter, and arrives at the filtration unit under the gas driving force; the dusty gas enters the annular gas passage 23 from an inner layer filtration surface (the inner wall surface of the second cylinder 22) and an outer layer filtration surface (the outer wall surface of the first cylinder 21) at the two sides of the annular gas passage 23 of the filter tube 2, respectively; the dust particles are intercepted on the inner layer filtration surface and the outer layer filtration surface to form pressed powder layers (see FIG. 3); the filtered gas is the clean gas, which flows to the clean gas side of the filter in an arrow direction shown in FIG. 3, flows out of the gas outlet 5 and undergoes the subsequent process. When dust removal is carried out through pulse-jet, the pulse-jet valve 8 on the pulse-jet pipeline 7 is instantaneously opened; after arriving at the position of the guiding cone, the pulse-jet gas is guided into the blade channel by the guiding cone; after passing through the blade, the high speed pulse jet gas is rotated, and enters the annular gas passage 23 of the filter tube in the form of a rotational flow; the rotating gas flow forms a vortex in the internal space of the filter tube to transfer energy from above to below, thereby peeling off the dust layers on the inner layer filtration surface and the outer layer filtration surface of the filter tube, and reproducing the performance of the filter tube (see FIG. 4).