CN202983430U - Self-excited oscillation nozzle and filter pulse back-blowing dedusting device with same - Google Patents
Self-excited oscillation nozzle and filter pulse back-blowing dedusting device with same Download PDFInfo
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- CN202983430U CN202983430U CN 201220624890 CN201220624890U CN202983430U CN 202983430 U CN202983430 U CN 202983430U CN 201220624890 CN201220624890 CN 201220624890 CN 201220624890 U CN201220624890 U CN 201220624890U CN 202983430 U CN202983430 U CN 202983430U
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Abstract
The utility model provides a self-excited oscillation nozzle and a filter pulse back-blowing dedusting device with the same. A filter tube plate of the filter pulse back-blowing dedusting device with the self-excited oscillation nozzle is provided with a filtering unit, a clean gas chamber is arranged on the upper portion of the tube plate, and a dusty gas chamber is arranged on the lower portion of the tube plate. The filter pulse back-blowing dedusting device comprises an ejector and a back-blowing pipe, one end of the back-blowing pipe is communicated with a back-blowing gas storage tank through a pulse back-blowing valve, and the self-excited oscillation nozzle corresponding to the top of the ejector is arranged at the other end of the back-blowing pipe. The self-excited oscillation nozzle comprises a center hole cylindrical self-excited oscillation cavity, a gas inlet and a gas outlet are arranged at the upper end and the lower end of the self-excited oscillation cavity, the gas inlet is communicated with the back-blowing pipe, an oscillation frequency adjusting component is axially hung in the self-excited oscillation cavity corresponding to the gas inlet and the gas outlet, the oscillation frequency adjusting component is in a shape of a spindle with two narrow ends and a wide middle, and the outer surface is a smooth transition surface. When the back-blowing valve is opened, the self-excited oscillation nozzle enables back-blowing gas to be generated in a filter tube and transfer a plurality of pressure oscillation waves, back-blowing non-uniformity can be improved, and dedusting efficiency is improved.
Description
Technical field
The utility model is about a kind of gas-solid separating device, relates to a kind of pulse backblowing deashing device of filter, relates in particular to a kind of self-oscillation nozzle and with the filter pulse backblowing deashing device of this nozzle.
Background technology
In the industries such as chemical industry, oil, metallurgy, electric power, often produce high-temperature dusty gas; Because different process need to recover energy and reach environmental emission standard, all need these high-temperature dusty gas are carried out dedusting.Gas cleaning at high temperature is directly to carry out gas solid separation under hot conditions, realizes a technology of gas purification, and it can farthest utilize the physics sensible heat of gas, potential chemical heat and kinetic force, improve energy utilization rate, process simplification, save equipment investment simultaneously.
The rigidity high temperature filtration elements such as sintering metal chimney filter and ceramic chimney filter have good anti-seismic performance, high temperature resistant, corrosion-resistant and thermal shock resistance properties, have simultaneously higher filtering accuracy and filter efficiency, therefore, are widely used in the high temperature gas cleaning field.
After high-temperature dusty gas enters filter, dust granules thing in air-flow is intercepted at the outer surface of filter element, forms cake layer, and gas enters into subsequent technique by the porous channel in filter element, be clean gas through the gas after filtering, dust concentration is very little.Along with the carrying out of filtering, the muffin layer of filter element outer surface can progressive additive, causes the pressure drop of filter element to increase, and at this moment needs to adopt the mode of blowback to realize the quality rebuilding of filter element; The direction of blowback air-flow and filtered airflow opposite direction, high pressure blowback air-flow moment enters into the inside of filter element, the muffin layer that relies on the transient energy that produces will be attached to the filter element outer surface is peeled off, state when making the pressure drop of filter element basically return to initial filtration, thus realize the regeneration of filter element performance.
The pulse backblowing mode is the important channel of realizing the performance cycle regeneration of filter element, and the deashing property of pulse backblowing deashing device has determined that can high-temperature gas filter steady in a long-term move.
The structure of existing high-temperature gas filter mainly contains two kinds of forms: circular configuration and square structure (shape according to tube sheet is distinguished).As shown in Fig. 9 A, Fig. 9 B, structural representation for the high-temperature filter 800 of circular configuration, the high-temperature filter 800 of this circular configuration is mainly used in the operating mode (typical duty parameter is: operating pressure is about 46MPa, and operating temperature is about 350-450 ℃) of HTHP; As shown in Figure 10 A, Figure 10 B, structural representation for the high-temperature filter 900 of square structure, the high-temperature filter 900 of this square structure is mainly used in the operating mode (typical duty parameter is: operating pressure is about 0.2-0.4MPa, and operating temperature is about 550-650 ℃) of high-temperature low-pressure; The operation principle of the high-temperature filter of these two kinds of different structures is identical.
As shown in Fig. 9 A, Fig. 9 B, Figure 10 A, Figure 10 B, filter 800,900 tube sheet 803,903 are divided into two parts with filter seal, and the bottom is divided into the ash-laden gas side, and top is divided into the clean gas side; Dusty gas (or being called crude synthesis gas) is entered into the ash-laden gas side of filter by filter 800,900 gas access 801,901, arrive each filter element under the effect of gas push power, dust granules thing in air-flow is intercepted at chimney filter 802,902 outer surface, form the muffin layer, gas enters the clean gas side by chimney filter 802,902 porous channel after filtering, and discharges through gas vent 805,905 and enters subsequent technique.carrying out along with filter operation, chimney filter 802, the muffin layer progressive additive of 902 outer surfaces, cause filter 800, 900 pressure drop increases, at this moment need to adopt the mode of pulse backblowing to realize the quality rebuilding of chimney filter, during the pulse backblowing deashing, be in the pulse backblowing valve 808 of normally off, 908 open, gas reservoir 809, high pressure nitrogen in 909 or Clean synthesis gas moment enter blowback pipeline 807, in 907, then by the nozzle 806 on pipeline, 906 injectors 804 to correspondence, the purge gas of 904 internal spray high-voltage high-speeds, purge gas enters corresponding chimney filter 802, 902 inside, utilize the energy of transient state with chimney filter 802, the dust layer of 902 outer surfaces peels off, make the resistance of chimney filter basically return to original state, thereby realize the quality rebuilding of chimney filter.
As shown in Fig. 9 A, Fig. 9 B, be in circular 800, one filter elements of filter, many chimney filters (48 chimney filters are installed usually) to be installed for the chimney filter arrangement mode, each filter element shares an injector 804; In the filter element of circle, chimney filter 802 according to etc. triangular pattern arrange; 12 or 24 filter elements are installed on the tube sheet 803 of filter usually; During pulse backblowing, according to the blowback time that sets, after the complete first group of filter element of blowback, through certain hour, then second group of filter element of blowback, then pass through the 3rd group of filter element of blowback after certain hour, so move in circles.
as Figure 10 A, shown in Figure 10 B, be square filter 900 for the chimney filter arrangement mode, chimney filter 902 on square tube sheet 903 according to row, being listed as equidistant mode arranges, be divided into some groups with behavior unit, common every row is provided with several to tens chimney filters 902, the corresponding winding-up pipeline 907 of every row chimney filter 902, each winding-up pipeline 907 is provided with a plurality of nozzles 906, corresponding chimney filter 902 under each nozzle 906, the blowback process is carried out with the grouping of behavior unit, be that the first row pulse backblowing valve 908 is opened, after corresponding complete this row filter element of winding-up pipeline 907 blowbacks, through certain hour, the pulse backblowing valve 908 of the second row is opened, the filter element of second row winding-up pipeline 907 blowback the second row, pass through again certain hour, the third line pulse backblowing valve 908 is opened, the filter element of blowback the third line, so move in circles.
in sum, the pulse backblowing mode of high-temperature gas filter of the prior art, all that the energy that leans on the high pressure purge gas to produce the transient state of a pressure wave in chimney filter is realized ash-removal effect, in prior art, the nozzle of Pulse anti-blow device is conventional single hole (single tube) structure, nozzle is arranged on the blowback pipeline, when the nozzle of this structure of purge gas process sprays, can only produce a pressure wave in the inside of chimney filter, usually we think, the pressure of blowback is larger, the peak value that produces pressure is higher, the effect of deashing is just better, but, in practical operation, the blowback mode of prior art inevitably can produce following a lot of problem:
(1) pulse backblowing hypertonia.
The blowback air-flow need to overcome the operating pressure of filter and the flow resistance of filtered airflow, and the blowback air stream energy can not all be applied on filter element; Therefore, for guaranteeing ash-removal effect, need to be greater than the deashing pressure of 2 times of left and right of filter operation pressure in practical operation, blowback pressure under HTHP operation operating mode can be up to 8MPa, chimney filter can be subject to very large impulsive force, easily cause the chimney filter vibration in this process, blowback pressure is higher, and the vibration Shaoxing opera of chimney filter is strong; This high pressure deashing processing ease causes chimney filter even to rupture because thermal shock fatigue causes breakage.
(2) the pulse backblowing effect is inhomogeneous.
During pulse backblowing, after the transient energy of giving birth to due to blowback air miscarriage enters chimney filter, carry out along the adterminal blind end of the openend of chimney filter in the process of energy transmission, the blowback air-flow constantly leaks from the porous channel space of chimney filter, constantly dissipate in the process that makes energy transmit, cause the ash-removal effect on the bottom of chimney filter and top widely different, the dust layer that is attached to the chimney filter lower surface is difficult for being removed by the blowback air-flow, incomplete deashing phenomenon appears, the dust layer that causes between chimney filter is built bridge, and easily causes chimney filter to lose efficacy.
(3) the pulse backblowing cleaning efficiency is low.
As previously mentioned, in existing back-flushing technique, mainly weigh ash-removal effect by the blowback pressure peak; Pressure peak refers to pulse jet moment, and the deashing air-flow of back-blowing device ejection is at the inner maximum pressure that produces of chimney filter; But, the pressure peak height may not reach desirable ash-removal effect, main cause is, the existing each blowback of pulse backblowing deashing device (that is: the pulse backblowing valve is opened once) can only produce a pressure wave chimney filter is inner, because the ash-removal effect of the upper and lower position of chimney filter differs greatly, adds that the energy attenuation of pressure wave of generation is very fast, so, find in existing high-temperature filter actual moving process, the efficient of pulse backblowing deashing is lower, does not reach desirable ash-removal effect.
So, if use the pulse backblowing deashing device of prior art, when operating, adopts deashing the keying of pulse backblowing magnetic valve more often, every unlatching pulsatile once blowback magnetic valve, just chimney filter is carried out a deashing operation, as if also can reach the purpose that improves cleaning efficiency.But this mode of operation is definitely worthless, and reason is as follows: the first, and the pulse backblowing magnetic valve is expensive, and the service life of the diaphragm of magnetic valve is limited, and constantly opens solenoid valve is equivalent to reduce its life cycle; Second, under the high temperature actual condition, more the dusty gas that filters contains and is corrosive and inflammable, explosion hazard gas, therefore, often adopt pure inert gas (as: nitrogen etc.) as the deashing source of the gas during deashing, the cost of inert gas is very high, and many opens solenoid valve are equivalent to increase the consumption of purge gas; The 3rd, because pulse backblowing needs higher blowback pressure, blowback air flows in the process of chimney filter, and is very large to the thermal shock power of chimney filter, if unbalanced pulse blowback magnetic valve repeatedly will certainly cause damage to chimney filter, shortens the service life of chimney filter; The 4th, during reverse gas cleaning, an important principle is, could deashing when the dust layer of chimney filter outer surface reaches certain thickness, if dust layer is very thin, active force between dust layer is just very little, the energy of deashing can not produce effect at all, thin dust layer is peeled off, therefore, although the blowback effect does not reach requirement, can not the opens solenoid valve deashing, when the dust layer that can only wait until the chimney filter surface is accumulated to certain thickness again, then carry out the blowback operation.
Thus, the inventor proposes a kind of filter pulse backblowing deashing device with the self-oscillation nozzle, to overcome the defective of prior art by means of being engaged in experience and the practice of relevant industries for many years.
The utility model content
The purpose of this utility model is to provide a kind of self-oscillation nozzle and with the filter pulse backblowing deashing device of this nozzle, when pulse backblowing is carried out in the unlatching of pulse backblowing valve, purge gas is produced in chimney filter and transmit a plurality of pressure oscillation ripples by the self-oscillation nozzle, to improve the blowback inhomogeneities, improve cleaning efficiency.
Another purpose of the present utility model is to provide a kind of self-oscillation nozzle and with the filter pulse backblowing deashing device of this nozzle, to reduce backflowing gas amount consumption; Reduce simultaneously the thermal shock power to chimney filter, extend the service life of chimney filter.
The purpose of this utility model is achieved in that a kind of filter pulse backblowing deashing device with the self-oscillation nozzle, and the tube sheet of filter is provided with filter element, comprises at least a filter element in described filter element; Described tube sheet is divided into the clean gas chamber on top and the dusty gas chamber of bottom with filter seal; Described pulse backblowing deashing device includes the injector of filter element top setting and the blowback pipeline corresponding with injector, blowback pipeline one end is communicated in the blowback air accumulator by the pulse backblowing valve, and the blowback pipeline other end is provided with the self-oscillation nozzle with the corresponding setting in injector top; Described self-oscillation nozzle includes a cylindric the self-excited oscillation cavity of mesopore, the upper and lower end correspondence of this self-excited oscillation cavity is provided with gas feed and gas vent, gas feed is communicated in the blowback pipeline, corresponding gas feed and gas vent axially hang a frequency of oscillation and regulate parts in the self-excited oscillation cavity, and it is the fusiformis shape of rounding off face that these adjustings parts are presented the wide and outer surface in point centre, lower two ends.
In a better embodiment of the present utility model, described gas feed and gas vent are to arrange along the central axis direction of the self-excited oscillation cavity; Gas feed and gas vent are diameter less than the pipe of the self-excited oscillation cavity; The internal diameter of described gas vent is gradually-reducing shape; Described frequency of oscillation is regulated parts and is hung on the pipe center of gas feed by a position adjustments bar of its top axial connection.
In a better embodiment of the present utility model, be provided with a suspension holdfast in the pipe of described gas feed, the center of suspension holdfast is fixed on the top of described position adjustments bar.
In a better embodiment of the present utility model, described the self-excited oscillation cavity is communicated with by the truncated cone-shaped connecting portion with gas feed pipe and/or gas vent pipe; Described truncated cone-shaped connecting portion and two ends, the self-excited oscillation cavity up and down are the outer gibbosity setting or are the inner concavity setting.
In a better embodiment of the present utility model, the tube sheet of described filter is provided with many group filter elements, is provided with a plurality of filter elements in every group of filter element; The injector top of every group of filter element correspondence respectively arranges a self-oscillation nozzle.
In a better embodiment of the present utility model, described filter element is sintering metal chimney filter or ceramic chimney filter.
The purpose of this utility model can also realize like this, a kind of self-oscillation nozzle, described self-oscillation nozzle includes a cylindric the self-excited oscillation cavity of mesopore, the upper and lower end correspondence of this self-excited oscillation cavity is provided with gas feed and gas vent, corresponding gas feed and gas vent axially hang a frequency of oscillation and regulate parts in the self-excited oscillation cavity, and it is the fusiformis shape of rounding off face that these adjustings parts are presented the wide and outer surface in point centre, lower two ends.
In a better embodiment of the present utility model, described gas feed and gas vent are to arrange along the central axis direction of the self-excited oscillation cavity; Gas feed and gas vent are diameter less than the pipe of the self-excited oscillation cavity; The internal diameter of described gas vent is gradually-reducing shape; Described frequency of oscillation is regulated parts and is hung on the pipe center of gas feed by a position adjustments bar of its top axial connection.
In a better embodiment of the present utility model, be provided with a suspension holdfast in the pipe of described gas feed, the center of suspension holdfast is fixed on the top of described position adjustments bar.
In a better embodiment of the present utility model, described the self-excited oscillation cavity is communicated with by the truncated cone-shaped connecting portion with gas feed pipe and/or gas vent pipe; Described truncated cone-shaped connecting portion and two ends, the self-excited oscillation cavity up and down are the outer gibbosity setting or are the inner concavity setting.
From the above mentioned, filter pulse backblowing deashing device with the self-oscillation nozzle of the present utility model, when pulse backblowing is carried out in the unlatching of pulse backblowing valve, only at the utmost point of pulsatile once blowback in the short time, purge gas can produce and transmit a plurality of pressure oscillation ripples after by the self-oscillation nozzle in chimney filter, can improve the blowback inhomogeneities thus, improve cleaning efficiency.This pulse backblowing deashing device can also reduce backflowing gas amount consumption; Reduce simultaneously the thermal shock power to chimney filter, extend the service life of chimney filter.
Description of drawings
The following drawings only is intended to the utility model is done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the structural representation of the utility model with the filter pulse backblowing deashing device of self-oscillation nozzle.
Fig. 2 A: be the structural representation of self-oscillation nozzle in the utility model.
Fig. 2 B: be A-A sectional structure schematic diagram in Fig. 2 A.
Fig. 2 C: be broken section structural representation in Fig. 2 A.
Fig. 3: the schematic diagram that produces the pressure oscillation ripple for self-oscillation nozzle in the utility model.
Fig. 4: the structural representation that is used for the round tube panel filter for the utility model pulse backblowing deashing device.
Fig. 5: the structural representation that is used for the rectangular tube panel filter for the utility model pulse backblowing deashing device.
Fig. 6 A～Fig. 6 E: be the various structures schematic diagram of self-oscillation nozzle in the utility model.
Fig. 7: the pressure waveform contrast during for the utility model and prior art blowback in chimney filter.
Fig. 8: be the reverse gas cleaning efficient contrast of the utility model and prior art.
Fig. 9 A: be the structural representation of the high-temperature filter of existing circular configuration.
Fig. 9 B: be the plan structure schematic diagram of Fig. 9 A.
Figure 10 A: be the structural representation of the high-temperature filter of existing square structure.
Figure 10 B: be the plan structure schematic diagram of Figure 10 A.
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model.
As shown in Figure 1, the utility model proposes a kind of filter pulse backblowing deashing device 100 with the self-oscillation nozzle, the tube sheet 3 of filter is provided with filter element, and described filter element comprises a chimney filter 2 at least, and the chimney filter in the utility model is sintering metal chimney filter or ceramic chimney filter; Described tube sheet 3 is divided into the clean gas chamber on top and the dusty gas chamber of bottom with filter seal; Dusty gas is entered into the dusty gas chamber of filter by the gas access 1 of filter, arrive filter element under the effect of gas push power, dust granules thing in air-flow is intercepted at the outer surface of chimney filter 2, enter the clean gas chamber after the porous channel filtration of gas by chimney filter, discharge through gas vent 5 and enter subsequent technique; Described pulse backblowing deashing device 100 includes the injector 4 of filter element top setting and the blowback pipeline 7 corresponding with injector 4, blowback pipeline 7 one ends are communicated in blowback air accumulator 9 by pulse backblowing valve 8, and blowback pipeline 7 other ends are provided with the self-oscillation nozzle 6 with the injector 4 corresponding settings in top; As shown in Fig. 2 A, Fig. 2 B, Fig. 2 C, described self-oscillation nozzle 6 includes a cylindric the self-excited oscillation cavity 61 of mesopore, the upper and lower end correspondence of this self-excited oscillation cavity 61 is provided with gas feed 62 and gas vent 63, gas feed 62 is communicated in blowback pipeline 7, regulate parts 64 in the interior corresponding gas feed 62 of the self-excited oscillation cavity 61 and the axial frequency of oscillation that hangs of gas vent 63, these adjusting parts 64 are two ends, up and down point, the centre is wide and outer surface is the fusiformis shape of rounding off face.
the utility model is with the filter pulse backblowing deashing device 100 of self-oscillation nozzle, when the pulse backblowing deashing, pulse backblowing valve 8 moments unlatching on blowback pipeline 7, one high-speed gas jet is when the gas access 62 of self-oscillation nozzle 6 enters the self-excited oscillation cavity 61 of axially symmetric structure in blowback air accumulator 9, high-speed pulse gas can be in the interior turbulent mixture that occurs of the self-excited oscillation cavity 61, produce momentum-exchange, form unstable shear layer, the unstability of and shear layer large due to effluxvelocity, form little vortex S1 (as shown in Figure 3) around shear layer, vorticity disturbance in the shearing jet in the certain frequency scope is amplified, form large scale vortex S2, regulate when the fusiformis in the self-excited oscillation cavity 61 of this large scale vortex S2 and nozzle and can produce edge tone when parts 64 bump against, the perturbation wave of edge tone makes phase mutual excitation between the perturbation wave of shear layer unstable wave and feedback, mutually strengthens, and causes flowing of shear layer to produce pressure oscillation with specific frequency, simultaneously (the wall attachment effect principle: leave original flow direction when fluid has, change the tendency that flows along with the object that protrudes into, have the face friction between the body surface that fluid and it are flow through, at this moment the flow velocity of fluid can slow down due to the wall attachment effect of fluid, as long as the curvature of body surface is not too large, according to the bernoulli principle in hydrodynamics, the slowing down of flow velocity can cause fluid to be attracted on body surface flowing.fusiformis in the utility model is regulated parts 64 can make gas form wall attachment effect), a part of gas S3 can regulate along fusiformis the outside wall surface mobile (as shown in Figure 3) of parts 64, when the self-excited oscillation cavity 61 intrinsic frequencies coupling of the frequency of this pressure oscillation and nozzle, the pressure oscillation of feedback just can be amplified, thereby the γ-ray emission with wall attachment effect in the self-excited oscillation cavity 61 resonates, after pressure oscillation ripple S4 sprays from gas vent 63, pass to corresponding chimney filter 2 through injector 4, within the extremely short time (only once Pulse Cleaning), just can produce in the inside of chimney filter 2 repeatedly pressure oscillation ripple, thereby be equivalent to chimney filter 2 has been carried out repeatedly deashing, can improve cleaning efficiency, simultaneously repeatedly in the transmittance process of pressure oscillation ripple in chimney filter 2, also can improve the deashing inhomogeneities of chimney filter diverse location Shang Xia 2, reduce the possibility of the dust bridge between chimney filter.
From the above mentioned, filter pulse backblowing deashing device with the self-oscillation nozzle of the present utility model, when pulse backblowing is carried out in the unlatching of pulse backblowing valve, only at the utmost point of pulsatile once blowback in the short time, purge gas can produce and transmit a plurality of pressure oscillation ripples after by the self-oscillation nozzle in chimney filter, can improve the blowback inhomogeneities thus, improve cleaning efficiency.
In the present embodiment, the frequency of described self-oscillation flow jet flow is to be determined by the structure of self-oscillation nozzle and jet self character two aspects, the ash-removal effect when frequency of oscillation directly affects blowback; When filter element difference or operating mode not simultaneously, in order better to reach ash-removal effect, when we wish pulse backblowing, produce as much as possible stronger pressure oscillation ripple, when the intrinsic frequency characteristic of the driving frequency of pulse backblowing gas and self-oscillation nozzle arrangements is complementary, the pressure oscillation meeting of purge gas is more violent, and the blowback effect is better; So should design according to the gas characteristic of nozzle entrance the self-oscillation nozzle arrangements, make the intrinsic frequency of nozzle near the frequency of pulse gas, and then obtain good pressure oscillation effect; Therefore, in order to make Pulse anti-blow device be applicable to different operating modes or different filter elements, need to regulate the frequency of purge gas, in order to reach this purpose, the parts (the fusiformis frequency of oscillation is regulated parts) that can change frequency of oscillation of having packed in the inside, vibration chamber of nozzle.When regulating the upper-lower position of fusiformis frequency of oscillation adjusting parts, due to the structure that has changed nozzle, when making fusiformis frequency of oscillation adjusting parts be adjusted to a certain position, can reach best frequency of oscillation; Thereby make the use of Pulse anti-blow device of the present utility model more flexible.
Before using, the fusiformis frequency of oscillation in the self-oscillation nozzle is regulated parts through after debugging definite position, and its actual upper just putting has been fixed up; In use, can't, not need to regulate yet.
Further, as shown in Fig. 2 A, Fig. 2 B, Fig. 2 C, the gas feed 62 of described self-oscillation nozzle 6 and gas vent 63 are to arrange along the central axis direction of the self-excited oscillation cavity 61; Gas feed 62 and gas vent 63 are diameter less than the pipe of the self-excited oscillation cavity 61; The internal diameter of described gas vent 63 is gradually-reducing shape, and the runner effect of gradually-reducing shape is to concentrate oscillation energy; Described frequency of oscillation is regulated parts 64 and is hung on the pipe center of gas feed 62 by a position adjustments bar 641 of its top axial connection; Be provided with a suspension holdfast 621 in the pipe of described gas feed 62, this suspension holdfast 621 is configured to by symmetrically arranged three, and the center of suspension holdfast 621 is fixed on the top of described position adjustments bar by nut (or other clamping devices).In the present embodiment, described frequency of oscillation is regulated the height of parts 64 and the height identical (this height dimension is not restricted, can be different) of the self-excited oscillation cavity 61.
Further, in the present embodiment, the pulse backblowing deashing device is applicable to the filter of circular tube sheet and two kinds of structures of square tube sheet, and as Fig. 4, shown in Figure 5, the tube sheet 3 of described filter is provided with many group filter elements; Every group of filter element includes a plurality of chimney filters 2, and injector 4 tops correspondence respectively arrange a self-oscillation nozzle 6.
As shown in Fig. 6 A～Fig. 6 E, in the present embodiment, described the self-excited oscillation cavity 61 is communicated with by truncated cone-shaped connecting portion 65 with gas feed pipe 62 and gas vent pipe 63; Described truncated cone-shaped connecting portion 65 can be the outer gibbosity setting or be the inner concavity setting with two ends, the self-excited oscillation cavity up and down.As shown in Figure 6A, for being equipped with truncated cone-shaped connecting portion 65 between the self-excited oscillation cavity 61 and gas feed pipe 62 and gas vent pipe 63, and two truncated cone-shaped connecting portions 65 are the outer gibbosity setting; As shown in Fig. 6 C, Fig. 6 D, for being provided with truncated cone-shaped connecting portion 65 between the self-excited oscillation cavity 61 and gas feed pipe 62, in Fig. 6 C, truncated cone-shaped connecting portion 65 is the outer gibbosity setting, and in Fig. 6 D, truncated cone-shaped connecting portion 65 is the inner concavity setting; As shown in Fig. 6 B, Fig. 6 E, for being provided with truncated cone-shaped connecting portion 65 between the self-excited oscillation cavity 61 and gas vent pipe 63, in Fig. 6 B, truncated cone-shaped connecting portion 65 is the outer gibbosity setting, and in Fig. 6 E, truncated cone-shaped connecting portion 65 is the inner concavity setting.
The utility model compared with prior art has following beneficial effect:
(1) can significantly improve reverse gas cleaning efficient.
During due to pulse backblowing, produce repeatedly pressure oscillation in chimney filter, be equivalent to a blowback, carried out repeatedly deashing, so can greatly promote cleaning efficiency.
(2) improved the blowback inhomogeneities.
Because a plurality of pressure oscillation ripples that produce transmit in chimney filter, the openend that reduces by chimney filter loses to the energy dissipation of blind end, therefore can improve the blowback inhomogeneities of chimney filter different piece of the prior art, reduces the dust bridge between chimney filter.
(3) reduce backflowing gas amount consumption, reduce the thermal shock to chimney filter.
Use lower blowback pressure to reach ash-removal effect preferably, saved simultaneously tolerance consumption; Lower blowback pressure can be relatively little to the thermal shock power of chimney filter, can slow down the problems such as fracture that heat fatigue causes, thereby extend the service life of chimney filter.
(4) especially applicable rigid filter element, use flexibly.
Applicable condition and the characteristics of the utility model pulse backblowing deashing device are: the pulse backblowing fluid is transient state (the blowback duration is very short, is only 300-500ms), the compressible gases at high pressure of unstable state; Especially applicable rigid filter element (as: ceramic chimney filter or sintering metal chimney filter); The utility model can be according to actual condition and different filter elements, and what modulate best purge gas agitates frequency certainly, thereby reaches best result of use, uses flexibly.
Effect of the present utility model increase its credibility and feasibility for better illustrating, now some experimental data is announced.
By experiment, draw in the situation that use pulse backblowing deashing device of the present utility model and use pressure waveform and reverse gas cleaning efficient in the chimney filter of pulse backblowing deashing device of prior art, and compare.
Experiment is carried out in the actual high temperature air filtration device of certain factory, under identical experiment condition, the pressure waveform in a certain chimney filter in filter is measured, and the pulse backblowing pressure and temperature of use is respectively 8.2MPa and 225 ℃.
As Fig. 7, shown in Figure 8, the pressure waveform contrast when Fig. 7 is the utility model and prior art blowback in chimney filter; Fig. 8 is the reverse gas cleaning efficient contrast of the utility model and prior art.
As seen from Figure 7, during the blowback of prior art pulse backblowing deashing device, the pressure waveform in chimney filter is fast rise, descends gradually again after reaching a peak value, rely on the energy of transient state to realize deashing, the pressure peak that the existing pulse backblowing technology of this measuring produces is about 4.8MPa; And use when certainly agitating the pulse backblowing deashing device of nozzle, the pressure waveform that has occurred vibration in chimney filter, at pulse width 350ms in this extremely short time, the pressure oscillation ripple has appearred in chimney filter 10 times, although the pressure peak that its pressure peak produces less than prior art, but be equivalent to chimney filter has been carried out 10 subpulse blowbacks, therefore can improve significantly ash-removal effect.
In order further to verify the performance of back-blowing device of the present utility model, cleaning efficiency in the filter cyclic process has been carried out the real time measure, as shown in Figure 8, result shows, in the running of filter, the cleaning efficiency when using the back-blowing device that has ash-clearing technology now is starkly lower than the cleaning efficiency when using back-blowing device of the present utility model; The utility model is significantly improved with the cleaning efficiency of the filter pulse backblowing deashing device of self-oscillation nozzle.
The above is only the schematic specific embodiment of the utility model, is not to limit scope of the present utility model.Any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (10)
1. filter pulse backblowing deashing device with the self-oscillation nozzle, the tube sheet of filter is provided with filter element, comprises at least a filter element in described filter element; Described tube sheet is divided into the clean gas chamber on top and the dusty gas chamber of bottom with filter seal; Described pulse backblowing deashing device includes the injector of filter element top setting and the blowback pipeline corresponding with injector, blowback pipeline one end is communicated in the blowback air accumulator by the pulse backblowing valve, it is characterized in that: the blowback pipeline other end is provided with the self-oscillation nozzle with the corresponding setting in injector top; Described self-oscillation nozzle includes a cylindric the self-excited oscillation cavity of mesopore, the upper and lower end correspondence of this self-excited oscillation cavity is provided with gas feed and gas vent, gas feed is communicated in the blowback pipeline, corresponding gas feed and gas vent axially hang a frequency of oscillation and regulate parts in the self-excited oscillation cavity, and it is the fusiformis shape of rounding off face that these adjustings parts are presented the wide and outer surface in point centre, lower two ends.
2. the filter pulse backblowing deashing device with the self-oscillation nozzle as claimed in claim 1 is characterized in that: described gas feed and gas vent are that the central axis direction along the self-excited oscillation cavity arranges; Gas feed and gas vent are diameter less than the pipe of the self-excited oscillation cavity; The internal diameter of described gas vent is gradually-reducing shape; Described frequency of oscillation is regulated parts and is hung on the pipe center of gas feed by a position adjustments bar of its top axial connection.
3. the filter pulse backblowing deashing device with the self-oscillation nozzle as claimed in claim 2, it is characterized in that: be provided with a suspension holdfast in the pipe of described gas feed, the center of suspension holdfast is fixed on the top of described position adjustments bar.
4. the filter pulse backblowing deashing device with the self-oscillation nozzle as claimed in claim 2, it is characterized in that: described the self-excited oscillation cavity is communicated with by the truncated cone-shaped connecting portion with gas feed pipe and/or gas vent pipe; Described truncated cone-shaped connecting portion and two ends, the self-excited oscillation cavity up and down are the outer gibbosity setting or are the inner concavity setting.
5. the filter pulse backblowing deashing device with the self-oscillation nozzle as claimed in claim 1, is characterized in that: organize filter elements more the tube sheet of described filter is provided with, be provided with a plurality of filter elements in every group of filter element; The injector top of every group of filter element correspondence respectively arranges a self-oscillation nozzle.
6. the filter pulse backblowing deashing device with the self-oscillation nozzle as claimed in claim 1, it is characterized in that: described filter element is sintering metal chimney filter or ceramic chimney filter.
7. self-oscillation nozzle, it is characterized in that: described self-oscillation nozzle includes a cylindric the self-excited oscillation cavity of mesopore, the upper and lower end correspondence of this self-excited oscillation cavity is provided with gas feed and gas vent, corresponding gas feed and gas vent axially hang a frequency of oscillation and regulate parts in the self-excited oscillation cavity, and it is the fusiformis shape of rounding off face that these adjustings parts are presented the wide and outer surface in point centre, lower two ends.
8. self-oscillation nozzle as claimed in claim 7 is characterized in that: described gas feed and gas vent are that the central axis direction along the self-excited oscillation cavity arranges; Gas feed and gas vent are diameter less than the pipe of the self-excited oscillation cavity; The internal diameter of described gas vent is gradually-reducing shape; Described frequency of oscillation is regulated parts and is hung on the pipe center of gas feed by a position adjustments bar of its top axial connection.
9. self-oscillation nozzle as claimed in claim 8, it is characterized in that: be provided with a suspension holdfast in the pipe of described gas feed, the center of suspension holdfast is fixed on the top of described position adjustments bar.
10. self-oscillation nozzle as claimed in claim 8, it is characterized in that: described the self-excited oscillation cavity is communicated with by the truncated cone-shaped connecting portion with gas feed pipe and/or gas vent pipe; Described truncated cone-shaped connecting portion and two ends, the self-excited oscillation cavity up and down are the outer gibbosity setting or are the inner concavity setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624890 CN202983430U (en) | 2012-11-22 | 2012-11-22 | Self-excited oscillation nozzle and filter pulse back-blowing dedusting device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624890 CN202983430U (en) | 2012-11-22 | 2012-11-22 | Self-excited oscillation nozzle and filter pulse back-blowing dedusting device with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202983430U true CN202983430U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220624890 Expired - Lifetime CN202983430U (en) | 2012-11-22 | 2012-11-22 | Self-excited oscillation nozzle and filter pulse back-blowing dedusting device with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202983430U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961934A (en) * | 2012-11-22 | 2013-03-13 | 中国石油大学(北京) | Self-oscillation nozzle and filter pulse jet cleaning ash-removing device with same |
| CN104107603A (en) * | 2014-07-11 | 2014-10-22 | 中国石油大学(北京) | Filter device for purifying high-temperature gas |
| CN107335297A (en) * | 2017-08-23 | 2017-11-10 | 中国华能集团清洁能源技术研究院有限公司 | A kind of compact pulse backblowing cleaning ash filter |
| CN109621569A (en) * | 2019-01-10 | 2019-04-16 | 中国石油大学(北京) | From tuning recurrent pulses jet nozzle and filter |
-
2012
- 2012-11-22 CN CN 201220624890 patent/CN202983430U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961934A (en) * | 2012-11-22 | 2013-03-13 | 中国石油大学(北京) | Self-oscillation nozzle and filter pulse jet cleaning ash-removing device with same |
| WO2014079160A1 (en) * | 2012-11-22 | 2014-05-30 | 中国石油大学(北京) | Self-oscillating nozzle and pulse-aided back-flushing ash cleaning apparatus of filter equipped with self-oscillating nozzle |
| CN102961934B (en) * | 2012-11-22 | 2014-08-06 | 中国石油大学(北京) | Self-oscillation nozzle and filter pulse jet cleaning ash-removing device with same |
| US9409113B2 (en) | 2012-11-22 | 2016-08-09 | China University of Petroleum—Beijing | Self-oscillating nozzle and pulse-jet cleaning system with the same |
| CN104107603A (en) * | 2014-07-11 | 2014-10-22 | 中国石油大学(北京) | Filter device for purifying high-temperature gas |
| CN104107603B (en) * | 2014-07-11 | 2015-07-08 | 中国石油大学(北京) | Filter device for purifying high-temperature gas |
| CN107335297A (en) * | 2017-08-23 | 2017-11-10 | 中国华能集团清洁能源技术研究院有限公司 | A kind of compact pulse backblowing cleaning ash filter |
| CN109621569A (en) * | 2019-01-10 | 2019-04-16 | 中国石油大学(北京) | From tuning recurrent pulses jet nozzle and filter |
| CN109621569B (en) * | 2019-01-10 | 2024-02-02 | 中国石油大学(北京) | Self-direction-regulating periodic pulse jet nozzle and filter |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130612 Effective date of abandoning: 20140806 |
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| RGAV | Abandon patent right to avoid regrant |