CN202844789U - Pulse back-blowing ash removal device of filter - Google Patents
Pulse back-blowing ash removal device of filter Download PDFInfo
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- CN202844789U CN202844789U CN 201220511148 CN201220511148U CN202844789U CN 202844789 U CN202844789 U CN 202844789U CN 201220511148 CN201220511148 CN 201220511148 CN 201220511148 U CN201220511148 U CN 201220511148U CN 202844789 U CN202844789 U CN 202844789U
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Abstract
The utility model discloses a pulse back-blowing ash removal device of a filter. A filtering unit is arranged on a pipe plate of the filter; the pipe plate seals and divides the filter into a clean gas chamber and a dust-containing gas chamber; the pulse back-blowing ash removal device comprises an ejector arranged at the upper part of the filtering unit and a back-blowing pipeline corresponding to the ejector; one end of the back-blowing pipeline is communicated with a back-blowing gas storage tank through a pulse back-blowing valve; and a direction-adjusting type porous jet flow nozzle corresponding to the top of the ejector is arranged at the other end of the back-blowing pipeline. By adopting the direction-adjusting type porous jet flow nozzle with an adjustable jet flow direction in the pulse back-blowing ash removal device, the jet flow direction of the back-blowing gas can be adjusted, and the length of the jet flow is extended; and the primary jet flow and the secondary jet flow are uniformly mixed by multiple high-speed jet flows, thus the distribution condition of the back-blowing gas flows entering the ejector can be improved, the dispersion loss is reduced, the energy transfer efficiency of the ejector is improved, the non-uniformity of the pulse back blowing is avoided, and the shortcomings such as eccentric gas flow, filter pipe vibration and the like caused by the existing jet flow nozzle are overcome.
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 pulse backblowing deashing device with tuning formula multiple jet 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 needs these high-temperature dusty gas are carried out dedusting.Gas cleaning at high temperature is directly to carry out gas solid separation under the 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 is saved equipment investment simultaneously.
In the most potential current clean coal technology, take integrated gasification combined cycle plants (IGCC) and pressurized fluidized bed combined cycle for power generation (PFBC-CC) as the various coal fired power generation technology of representative with all to relate to the dust removal problem of high-temperature gas in the leading Coal Chemical Industry Poly-generation technology of coal gasification.The Clean Coal Power Generating Technologies such as IGCC are exactly high-temperature purification of gas in a common difficulty that runs in the commercialized development process, and its purpose one is protection gas turbine blades and upstream device, and the 2nd, make the flue gas of discharge meet environmental protection standard.
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.Take High Temperature Ceramic Filter as example, can remove the above particle of 5 μ m, the outlet dust content is less than 5mg/Nm
3, separative efficiency reaches 99.9%.
The pulse backblowing deashing device is the important guarantee of high-temperature gas filter stable operation.The filter of existing commercial Application and Pulse anti-blow device structure thereof are shown in Fig. 7 A, and the Pulse anti-blow device of filter mainly is comprised of purge gas storage tank 91, pulse backblowing valve 92, blowback pipeline 911, nozzle 912 and injector 93; The tube sheet 94 of filter is clean gas side and ash-laden gas side with the inner space sealed separation of filter; A filter element forms (48 chimney filters are installed in the common filter element) by many chimney filters 95, and each filter element shares an injector 93; In the filter element of circle, chimney filter according to etc. triangular pattern arrange; 12 or 24 filter elements are installed on the tube sheet 94 of filter usually.
Dusty gas (or being called crude synthesis gas) is entered the ash-laden gas side of filter by the gas access 96 of filter, under the effect of the gas push power of HTHP, arrive each filter element, particle in the air-flow is intercepted at the outer surface of chimney filter 95, form the muffin layer, after the porous channel filtration of gas by chimney filter, enter the shared air chamber that is consisted of by injector 93, enter afterwards the clean gas side, discharge through gas vent 97 and enter subsequent technique.Carrying out along with filter operation, the muffin layer progressive additive of chimney filter 95 outer surfaces, cause the pressure drop of filter to increase, at this moment need to adopt the mode of pulse backblowing to realize the quality rebuilding of chimney filter, during the pulse backblowing deashing, the pulse backblowing valve 92 that is in normally off opens that (opening/closing time of pulse valve is very short, belong to transient process, be generally 200ms-300ms), high pressure nitrogen in the gas reservoir 91 or Clean synthesis gas moment enter in the blowback pipeline 911, then by the purge gas of pipeline top nozzle 912 to the injector 93 internal spray high-voltage high-speeds of correspondence, under the ejector action of injector 93, can introduce the inside that a large amount of gas together enters injector 93 from clean gas side simultaneously, mixed purge gas passes chimney filter 95 inwalls, the energy that utilizes transient state peels off the dust layer of chimney filter outer surface, so that the resistance of chimney filter returns to original state basically, thereby realized the quality rebuilding of chimney filter.The dust of peeling off falls into ash bucket 97, regularly removes.In above-mentioned technique, the filter operation temperature is about 340 ℃, and operating pressure is about 4MPa, and pulse dust cleaning pressure is about 8MPa, and the purge gas temperature is greater than 225 ℃.
In above-mentioned existing Pulse anti-blow device, nozzle arrangements mainly adopts single hole, fixed-direction spray regime; This nozzle arrangements is unfavorable for the long-period stable operation of filter, mainly has following problem:
(1) the pulse backblowing deashing is inhomogeneous.
During pulse backblowing, when " jet " of nozzle ejection high-voltage high-speed enters the openend 931 of injector 93 (shown in Fig. 7 B), under " secondary drainage " effect of injector 93, introduce a large amount of gas from the clean gas side of filter, both are after trunnion 932 mixes, jointly enter diffusion chamber 933, enter afterwards in each chimney filter 95, the chimney filter of this unit is carried out deashing.Because the jet direction during winding-up is the center that faces filter element, the blowback air stream energy of this injection method will certainly more act on the filter element center, so that the chimney filter ash-removal effect of the chimney filter of close center and marginal position is widely different, chimney filter near the center bears larger gas shock power, easily cause fatigue fracture, the chimney filter deashing dynamics of marginal position is less, the dust layer that is attached to the chimney filter 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 causes the fracture failure of chimney filter.
(2) blowback air-flow off-centre causes injector to damage and the chimney filter vibration.
Existing single hole is the purge mode of jet direction fixedly, " secondary drainage " amount when increasing blowback, require the exit end face of nozzle to maintain a certain distance with the entrance face of injector, can reach certain blowback effect, this distance is generally 350-400mm; Because the gas pressure during pulse backblowing very easily causes the vibration of back-blowing device up to 8MPa, cause winding-up pipeline and nozzle to rock, under so long winding-up distance, even the less off-centre that also can cause the blowback air-flow of rocking.For existing industrial injector, the length of its trunnion part 932 is long (to be because jet length and the ejector capacity of the existing nozzle of sub-thread jet are limited, so require length of throat long, so that the mixing of flowed energy) and diameter less (in order to prevent the energy dissipation of sub-thread jet), when off-centre occurs in the blowback air-flow of high-voltage high-speed, can cause the erosion of injector to damage (injector of the field even askew situation of blowing down occured to be blown), can cause stronger impact to the stressed chimney filter than concentrated position of this filter element simultaneously, cause the strong vibration of chimney filter, the ability of anti-deformation of pottery chimney filter is relatively poor, easily cause the chimney filter fatigue fracture, although the sintering metal chimney filter has than obdurability, also easily impacted and damaged.
(3) reverse gas cleaning intensity and cleaning efficiency are low.
Ash-removal effect is mainly reflected on deashing intensity and the cleaning efficiency; The pressure peak that can reach in the chimney filter in the blowback process is to weigh the important indicator of ash-removal effect.Pressure peak refers to pulse jet moment, the maximum pressure that the deashing air-flow of back-blowing device ejection produces in the inside of chimney filter, and pressure peak is high can to realize preferably ash-removal effect.For existing back-blowing device, because nozzle and injector is distant, the limited length of " jet " during the nozzle winding-up is although energy is concentrated.But inhomogeneous when mixing in the trunnion position of injector with " secondary jet ", energy exchange and transmission efficiency are lower, so that the pressure peak in the blowback process chimney filter is lower, have affected deashing intensity and cleaning efficiency.
(4) average blowback economic performance is low.
The blowback economic performance is defined as: in the Pulse Cleaning, the ratio of the pressure peak that can reach in the chimney filter and the backflowing gas amount of consumption has reflected the blowback effect that the purge gas of consumption unit mass can reach.Average blowback economic performance refers to the chimney filter blowback economic performance mean value in the filter element.The gas energy of " jet " and " secondary drainage " has determined the pressure peak in the chimney filter jointly.Industrial high-temperature gas filter pure nitrogen or the Clean synthesis gas of adopting as the blowback source of the gas more, and the production cost of purge gas is expensive.Because the energy Main Function of the single hole jet nozzle of above-mentioned routine is in the chimney filter near the filter element center position, consume so in the situation of certain backflowing gas amount, the ash-removal effect of the chimney filter of marginal position is had a greatly reduced quality, simultaneously again because " jet " of prior art is limited in one's ability, cause pressure peak lower, therefore reduced average blowback economic performance.
Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes a kind of pulse backblowing deashing device of filter, to overcome the defective of prior art.
The utility model content
The purpose of this utility model is to provide a kind of pulse backblowing deashing device of filter, adopt the adjustable multiple jet nozzle of jet direction, can adjust jet direction, prolong jet length, utilize the multiply high-speed jet so that jet and secondary drainage mix, the air-flow distribution situation in the time of can improving purge gas and enter injector reduces divergence loss, improve the energy transfer efficiency of injector, overcome air-flow that existing jet nozzle brings eccentric with the defective such as chimney filter vibration.
The purpose of this utility model is achieved in that a kind of pulse backblowing deashing device of filter, and the tube sheet of described filter is provided with filter element, and the filter 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 tuning formula multiple jet nozzle with the corresponding setting in injector top.
In a better embodiment of the present utility model, the tube sheet of described filter is provided with many group filter elements; The injector top of every group of filter element respectively correspondence arranges a blowback pipeline.
In a better embodiment of the present utility model, described tuning formula multiple jet nozzle is made of the nozzle body that is fixedly connected with the blowback pipeline other end and a plurality of shower nozzles that are fixedly installed on the nozzle body bottom; Described shower nozzle includes the head body that fixedly is communicated with nozzle body, be connected in the jet pipe that clip-on cap on the head body and end fixed clamp other end between head body and clip-on cap pass clip-on cap.
In a better embodiment of the present utility model, consist of an interior concave spherical grasping part between described head body and the clip-on cap; The spherical clamping part that described jet pipe one end external connects, described spherical clamping part fixed clamp are in described spheric grasping part and form a spherical joint.
In a better embodiment of the present utility model, described jet pipe and spherical clamping part are one-body molded.
In a better embodiment of the present utility model, described jet pipe inside forms the runner of level and smooth convergent to the port of export.
In a better embodiment of the present utility model, described nozzle body comprises the connected chamber with the conducting of the blowback pipeline other end, and the connected chamber bottom is connected with shower nozzle by the truncated cone-shaped duct of convergent respectively.
In a better embodiment of the present utility model, described a plurality of truncated cone-shaped duct evenly distributes around the connected chamber bottom.
In a better embodiment of the present utility model, central part also is provided with a truncated cone-shaped duct in the truncated cone-shaped duct of annular spread.
From the above mentioned, adopted the adjustable tuning formula of jet direction multiple jet nozzle in the pulse backblowing deashing device of the utility model filter, can adjust the jet direction of purge gas, prolong jet length, by the multiply high-speed jet so that jet and secondary drainage evenly mix, air-flow distribution situation in the time of can improving thus purge gas and enter injector, reduce divergence loss, improve the energy transfer efficiency of injector, inhomogeneities when overcoming pulse backblowing, also overcome air-flow that existing jet nozzle brings eccentric with the defective such as vibration.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the structural representation of the pulse backblowing deashing device of the utility model filter.
Fig. 2: be the structural representation of tuning formula multiple jet nozzle in the utility model.
Fig. 3 A: the structural representation when jet pipe is 0 ° in the tuning formula multiple jet nozzle.
Fig. 3 B: the structural representation when jet pipe is 15 ° in the tuning formula multiple jet nozzle.
Fig. 4 A～Fig. 4 I: for a plurality of shower nozzles at nozzle body bottom distribution mode structural representation.
Fig. 5: be the structural representation of injector in the utility model.
Fig. 6: the schematic diagram that covers chimney filter in the filter element for the stream range of shower nozzle in the utility model.
Fig. 7 A: be the structural representation of existing filter.
Fig. 7 B: be the schematic diagram of arranging of filter element in the existing filter.
Fig. 8: under the high temperature actual condition, pressure peak and existing back-blowing device correction data figure in the chimney filter of Pulse anti-blow device of the present utility model.
Fig. 9: under the high temperature actual condition, the cleaning efficiency of the chimney filter of Pulse anti-blow device of the present utility model and existing back-blowing device correction data figure.
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.
The utility model proposes a kind of pulse backblowing deashing device of filter, as shown in Figure 1 and Figure 2, the tube sheet 5 of described filter is provided with filter element, in the present embodiment, described tube sheet is provided with many group filter elements, is provided with many chimney filters 6 in every group of filter element; Filter tube sheet 5 is divided into the clean gas chamber on top and the dusty gas chamber of bottom with filter seal, dusty gas is entered the dusty gas chamber of filter by the gas access 71 of filter, particle in the air-flow is intercepted at the outer surface of chimney filter 6, form the muffin layer, after the porous channel filtration of gas by chimney filter, enter the clean gas chamber, discharge through gas vent 72 and enter subsequent technique; Described pulse backblowing deashing device includes the injector 4 of filter element top setting and the blowback pipeline 2 corresponding with injector, blowback pipeline 2 one ends are communicated in blowback air accumulator 1 by pulse backblowing valve 21, and blowback pipeline 2 other ends are provided with the tuning formula multiple jet nozzle 3 with the corresponding setting in injector 4 tops; In the present embodiment, injector 4 tops of every group of filter element respectively correspondence one blowback pipeline 2 is set.Described tuning formula multiple jet nozzle 3 is made of the nozzle body 31 that is fixedly connected with blowback pipeline 2 other ends and a plurality of shower nozzles 32 that are fixedly installed on nozzle body 31 bottoms; Described shower nozzle 32 includes the head body 321 that fixedly is communicated with nozzle body 31, be connected in the jet pipe 323 that clip-on cap 322 on the head body 321 and end fixed clamp other end between head body 321 and clip-on cap 322 pass clip-on cap 322; Consist of an interior concave spherical grasping part between described head body 321 and the clip-on cap 322; The spherical clamping part 324 that described jet pipe 323 1 ends external connect, described spherical clamping part 324 fixed clamp are in described spheric grasping part and form a spherical joint; Because spherical joint can be adjusted direction arbitrarily, therefore, jet pipe 323 can be adjusted jet direction by spherical joint.
From the above mentioned, adopted the adjustable tuning formula of jet direction multiple jet nozzle in the pulse backblowing deashing device of the utility model filter, can adjust the jet direction of purge gas, prolong jet length, by the multiply high-speed jet so that jet and secondary drainage evenly mix, air-flow distribution situation in the time of can improving thus blowback air and flow to into injector, reduce divergence loss, improve the energy transfer efficiency of injector, inhomogeneities when overcoming pulse backblowing, also overcome air-flow that existing jet nozzle brings eccentric with the defective such as chimney filter vibration.
Further, as shown in Figure 2, in the present embodiment, described jet pipe 323 inside form the runner of level and smooth convergent to the port of export; So that the runner of outlet is less than the runner of entrance, the degree that jet pipe 323 inner flow passages shrink can design according to different working condition requirements.Because the runner convergent of outlet, can air pulse rapid expanding during ejection, improve effluxvelocity and jet ability because the flow velocity of a jet is high, the ability of its injection secondary jet is strong, can improve the injection effect thus; Because the runner of jet pipe 323 inside is the tapering type of rounding off, therefore can reduce air-flow by the time frictional resistance.
In the present embodiment, described spherical clamping part 324 is provided with the manhole of perforation, and jet pipe 323 is communicated in this through hole; Described jet pipe 323 and spherical clamping part 324 can be one-body molded, also can adopt Split type structure to be threaded connection, with the convenient jet pipe 323 of changing the inner flow passage different structure according to designing requirement.
In the present embodiment, such as Fig. 3 A, shown in Fig. 3 B, head body 321 adopts with clip-on cap 322 and is threaded, after spherical clamping part 324 places and adjusts the jet direction that needs in the interior concave spherical grasping part, head body 321 and clip-on cap 322 are screwed, spherical clamping part 324 is just clamped fixing (after nozzle installed, in the process of normal operation, in fact the angle of each jet pipe just is fixed, because stream distance and angle need to be according to condition calculating, high temperature and high pressure condition can not be accomplished automatic direction regulating, and there is no need automatic direction regulating.When process conditions change, just can when stopping, be operated, make it under the distance of optimum and angle automatching, to work) because what adopt between spherical clamping part 324 and the interior concave spherical grasping part is the linear sealing mode, therefore, in the blowback process Leakage Gas can not occur.In the present embodiment, jet direction angle adjustment scope is 0～30 °, 0 ° of position when being defined as jet pipe 323 and exporting vertically downward.
Further, as shown in Figure 2, in the present embodiment, described nozzle body 31 comprises the connected chamber 311 that is connected with 2 other end conductings of blowback pipeline, and connected chamber 311 bottoms are connected with shower nozzle 32 by the truncated cone-shaped duct 312 of convergent respectively.In the present embodiment, the shower nozzle 32 of described nozzle body 31 bottoms connection is 3～7.
The distribution mode of described a plurality of shower nozzle in nozzle body 31 bottoms has following two kinds: (1) described a plurality of truncated cone-shaped duct is around connected chamber bottom even circumferential distribution (shown in Fig. 4 A, 4B, 4D, 4F and 4H); (2) described a plurality of truncated cone-shaped duct distributes around connected chamber bottom even circumferential, and also is provided with a truncated cone-shaped duct (shown in Fig. 4 C, 4E, 4G and 4I) at the truncated cone-shaped duct of annular spread central part.When gas enters nozzle, what at first enter is columniform connected chamber 311, these connected chamber 311 effects mainly are the transition in order to form a connecting link, then blowback air stream passes through the duct 312 of inverted round stage structure (in connected chamber 311 inside of circular cross-section, the entrance of each inverted round stage is near tangent state), enter again the gas channel of head body 321, at last from jet pipe 323 ejections.Adopt the pore passage structure of inverted round stage, can farthest reduce the air flow losses of airflow collision on connected chamber 311 inwalls, simultaneously, because truncated cone-shaped duct 312 is tapering type passages, also reach the flow velocity that has promoted purge gas, increased the purpose of the kinetic energy of purge gas.
The utility model compared with prior art has following beneficial effect:
(1) improves air-flow distribution situation when blowback air flows to into injector, reduced divergence loss, the inhomogeneities when having overcome pulse backblowing.
(2) injector erosion damage that air-flow off-centre brings and the vibration problem of chimney filter have been reduced.
(3) can be according to different Operating condition adjustment jet directions, prolong jet length, utilize the multiply high-speed jet so that jet and secondary drainage mix, significantly improved deashing intensity.Under the identical condition, deashing strength ratio prior art improves 26%～32%.
(4) improved cleaning efficiency, under the identical condition, cleaning efficiency can promote 12%～17%.
The below arranges 7 shower nozzles in the tuning formula multiple jet nozzle and is specifically described as example, and the arrangement mode of described shower nozzle is 6 shower nozzles that distribute around nozzle body bottom even circumferential, and at 6 shower nozzle central parts of annular spread 1 shower nozzle is set.The flow angle of 6 shower nozzles of annular spread is 20 ° (that is: tilting 20 ° to nozzle body bottom periphery respectively), and the distance of winding-up (being the top of injector and the vertical range of nozzle end) is 50mm.
As shown in Figure 1, dusty gas is entered the dusty gas chamber of filter by the gas access 71 of filter, under the effect of the gas push power of HTHP, arrive each filter element, each filter element shares an injector, the outer surface that dust granules thing in the air-flow is intercepted at chimney filter 6 forms the muffin layer, and gas enters subsequent technique by the porous channel of chimney filter.Carrying out along with filter operation, the muffin layer progressive additive of chimney filter 6 outer surfaces, cause the pressure drop of filter to increase, at this moment need to adopt the mode of pulse backblowing to realize the quality rebuilding of chimney filter, during the pulse backblowing deashing, the pulse backblowing valve 21 that is in normally off opens that (opening/closing time of pulse valve is very short, belong to transient process, be generally 200ms-300ms), high pressure nitrogen in the gas reservoir 1 or Clean synthesis gas moment enter in the blowback pipeline 2, then raise the purge gas of the injector 4 internal spray high-voltage high-speeds to formula multiple jet nozzle 3 to correspondence by the winding-up pipeline, under the ejector action of injector, can introduce the inside that a large amount of gas together enters injector from the clean gas chamber simultaneously, mixed purge gas passes chimney filter 6 inwalls, the energy that utilizes transient state peels off the dust layer of chimney filter outer surface, so that the resistance of chimney filter returns to original state basically, thereby realized the quality rebuilding of chimney filter.The dust of peeling off falls into ash bucket 8, regularly removes.
For above-mentioned Pulse Cleaning, purge gas enters tuning formula multiple jet nozzle via the winding-up pipeline, behind nozzle interior process the truncated cone-shaped duct 312 and jet pipe 323 tapering type inner passages of nozzle body 31, kinetic energy when having increased purge gas via each shower nozzle ejection; As shown in Figure 5, the jet of shower nozzle at first enters the openend 41 of injector, the structure of openend 41 is reversed round bench shapeds, its purpose mainly is to carry out water conservancy diversion and limit stream range (if there is the angle of jet this situation bigger than normal for the jet to nozzle, just the jet that is ejected into openend can be imported to the inside of injector, prevent from impacting the waste that peripheral space causes the blowback air stream energy).Then " jet " and " secondary drainage " together enters the trunnion position 42 of injector, because what adopt is multiple jets, so that the jet of per share high-voltage high-speed all can a certain amount of gas of injection, therefore the tolerance of " secondary drainage " will be higher than existing single injector far away.Simultaneously since the energy of multiple jets than independent jet, it is high that the efficient that the speed of mixing with secondary jet and energy transmit is wanted, therefore, the highly shorter diameter of injector employing also larger trunnion also can reach good injection effect.The diffusion chamber 43 that mixed purge gas the enters into injector supercharging of slowing down, the transient energy of purge gas is passed through each chimney filter internal delivery of this unit to the dust layer of outer surface, reach the purpose of peeling off dust layer, finished the deashing process of pulse backblowing.
As shown in Figure 6,48 chimney filters being installed as example, when flow angle is 20 °, when the winding-up distance is 50mm, the stream range of 7 shower nozzles on the nozzle body covers (ideal situation as shown in Figure 6) with the chimney filter of this filter element, and the zones such as deashing scope are divided 7.Utilize like this multiply high-speed jet so that jet and secondary drainage mix, the corresponding regional extent of every one jet, air-flow distribution situation when having improved blowback air and flowing to into injector, reduce divergence loss, improved the energy transfer efficiency of injector, the ash-removal effect that reaches is better than existing sub-thread jet nozzle far away.
Owing to adopting the mode of multiple jets, the energy transmission of air-flow is fast, so the length of throat of injector can shorten greatly, it is same because each shower nozzle all has stronger jet effect, the distance of pulse backblowing can shorten greatly, even blowback distance during for 0mm (also being very approaching of entrance face of nozzle exit end and injector), still can reach good ash-removal effect.
Equally, because the jet during pulse jet, no longer concentrate on the center, but the chimney filter of all directions has all obtained more uniform blowback, so just overcome the impact of the air-flow off-centre in original technology, reduce the vibration of the chimney filter of this filter element, reduced the risk of thermal shock and fatigue fracture.On another aspect, also just prolonged the service life of chimney filter, and then ensured the reliable and stable operation of filter operation.
Effect of the present utility model increase its credibility and feasibility for better illustrating, now some experimental data is announced.
In the actual high-temperature gas filter of industry, use conventional single hole jet pulse back-blowing device and 7 hole jet pulse back-blowing devices of the present utility model, relatively the cleaning efficiency of blowback intensity (criterion is the pressure peak in the chimney filter under the identical blowback parameter) and filter actual moving process.
Experiment condition is the actual condition of high-temperature gas filter, and technological condition is as follows:
Purge gas is pure nitrogen;
The pulse width of blowback pressure and back-flushing valve is respectively 8.2MPa and 300ms;
Purge gas temperature: 225 ℃;
Filter operation pressure and operating temperature are respectively 4.15MPa and 355 ℃;
Form of nozzle: it is tapering type sub-thread hole jet nozzle that conventional back-blowing device has been installed the inner passage; Pulse anti-blow device of the present utility model has been installed 7 hole jet nozzles, 1 and 6 of circumference uniform distributions (with consistent among Fig. 4 I) centered by the arrangement mode.In 7 small nozzles, a flow angle at center is 0 ° (vertically downward), 6 flow angles of circumference uniform distribution are 20 °, the outlet total sectional area gross area equates (so just to have guaranteed in the measuring process with the discharge area of tapering type sub-thread hole jet nozzle, under the identical blowback parameter, the air consumption of two kinds of back-blowing devices is basically consistent).
Such as Fig. 8, shown in Figure 9, be respectively cleaning efficiency and the existing back-blowing device correction data figure of the chimney filter of Pulse anti-blow device of the present utility model under pressure peak in the chimney filter of Pulse anti-blow device of the present utility model under the high temperature actual condition and existing back-blowing device correction data figure and the high temperature actual condition.As can be known from Fig. 8: in the Pulse Cleaning, when using conventional back-blowing device, the pressure peak in the chimney filter is about 5.1MPa, because the mixing of jet and secondary drainage is inhomogeneous, cause having larger pressure oscillation in the chimney filter, easily cause the vibration of chimney filter; When using multiple jet back-blowing device of the present utility model, the pressure peak in the chimney filter is about 7.3MPa, blowback strength increase approximately 30%, and pressure oscillation is less, and visible multiple jet mode has obviously been improved the distribution situation of blowback air-flow.As can be known from Fig. 9: in the running of filter, cleaning efficiency when using conventional back-blowing device is starkly lower than multiple jet back-blowing device of the present utility model, and conventional back-blowing device cleaning efficiency has a declining tendency, also verified the deashing non-uniform phenomenon that exists in the blowback process, if things go on like this, will certainly affect the stable operation of filter.
The above only is 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 (9)
1. the pulse backblowing deashing device of a filter, the tube sheet of described filter is provided with filter element, and the filter 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 tuning formula multiple jet nozzle with the corresponding setting in injector top.
2. the pulse backblowing deashing device of filter as claimed in claim 1 is characterized in that: the filter elements of group more than the tube sheet of described filter is provided with; The injector top of every group of filter element respectively correspondence arranges a blowback pipeline.
3. the pulse backblowing deashing device of filter as claimed in claim 1 is characterized in that: described tuning formula multiple jet nozzle is made of the nozzle body that is fixedly connected with the blowback pipeline other end and a plurality of shower nozzles of being fixedly installed on the nozzle body bottom; Described shower nozzle includes the head body that fixedly is communicated with nozzle body, be connected in the jet pipe that clip-on cap on the head body and end fixed clamp other end between head body and clip-on cap pass clip-on cap.
4. the pulse backblowing deashing device of filter as claimed in claim 3 is characterized in that: consist of an interior concave spherical grasping part between described head body and the clip-on cap; The spherical clamping part that described jet pipe one end external connects, described spherical clamping part fixed clamp are in described spheric grasping part and form a spherical joint.
5. the pulse backblowing deashing device of filter as claimed in claim 4, it is characterized in that: described jet pipe and spherical clamping part are one-body molded.
6. the pulse backblowing deashing device of filter as claimed in claim 3, it is characterized in that: described jet pipe inside forms the runner of level and smooth convergent to the port of export.
7. the pulse backblowing deashing device of filter as claimed in claim 3, it is characterized in that: described nozzle body comprises the connected chamber with the conducting of the blowback pipeline other end, the connected chamber bottom is connected with shower nozzle by the truncated cone-shaped duct of convergent respectively.
8. the pulse backblowing deashing device of filter as claimed in claim 7 is characterized in that: described a plurality of truncated cone-shaped duct evenly distributes around the connected chamber bottom.
9. the pulse backblowing deashing device of filter as claimed in claim 8, it is characterized in that: central part also is provided with a truncated cone-shaped duct in the truncated cone-shaped duct of annular spread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511148 CN202844789U (en) | 2012-09-29 | 2012-09-29 | Pulse back-blowing ash removal device of filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511148 CN202844789U (en) | 2012-09-29 | 2012-09-29 | Pulse back-blowing ash removal device of filter |
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| Publication Number | Publication Date |
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| CN202844789U true CN202844789U (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220511148 Expired - Lifetime CN202844789U (en) | 2012-09-29 | 2012-09-29 | Pulse back-blowing ash removal device of filter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102908840A (en) * | 2012-09-29 | 2013-02-06 | 中国石油大学(北京) | Pulse backflush deashing device for filter |
| CN104524890A (en) * | 2014-12-24 | 2015-04-22 | 贵州天福化工有限责任公司 | Method and device for increasing blowback temperature of gasifying fly ash filter |
| CN104627739A (en) * | 2014-12-25 | 2015-05-20 | 江南大学 | Air twisting and untwisting device based on porous structure |
| CN109248506A (en) * | 2018-11-15 | 2019-01-22 | 中国石油大学(北京) | Manifold-type pulse backblowing ash-clearing structure and the filter for using the ash-clearing structure |
| CN109621569A (en) * | 2019-01-10 | 2019-04-16 | 中国石油大学(北京) | From tuning recurrent pulses jet nozzle and filter |
| CN114352582A (en) * | 2022-01-09 | 2022-04-15 | 擎能动力科技(苏州)有限公司 | Double-ejector system, hydrogen fuel cell double-ejector module system, design method and new energy automobile |
-
2012
- 2012-09-29 CN CN 201220511148 patent/CN202844789U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102908840A (en) * | 2012-09-29 | 2013-02-06 | 中国石油大学(北京) | Pulse backflush deashing device for filter |
| CN102908840B (en) * | 2012-09-29 | 2014-05-21 | 中国石油大学(北京) | Pulse backflush deashing device for filter |
| CN104524890A (en) * | 2014-12-24 | 2015-04-22 | 贵州天福化工有限责任公司 | Method and device for increasing blowback temperature of gasifying fly ash filter |
| CN104524890B (en) * | 2014-12-24 | 2016-06-15 | 贵州天福化工有限责任公司 | A kind of lifting coal gasification fly-ash filter blowback air temperature methods and device thereof |
| CN104627739A (en) * | 2014-12-25 | 2015-05-20 | 江南大学 | Air twisting and untwisting device based on porous structure |
| CN109248506A (en) * | 2018-11-15 | 2019-01-22 | 中国石油大学(北京) | Manifold-type pulse backblowing ash-clearing structure and the filter for using the ash-clearing structure |
| CN109248506B (en) * | 2018-11-15 | 2024-01-30 | 中国石油大学(北京) | Manifold type pulse back-blowing ash removing structure and filter using ash removing structure |
| 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 |
| CN114352582A (en) * | 2022-01-09 | 2022-04-15 | 擎能动力科技(苏州)有限公司 | Double-ejector system, hydrogen fuel cell double-ejector module system, design method and new energy automobile |
| CN114352582B (en) * | 2022-01-09 | 2022-11-22 | 擎能动力科技(苏州)有限公司 | Double-ejector system, hydrogen fuel cell double-ejector module system, design method and new energy automobile |
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| RGAV | Abandon patent right to avoid regrant |