CN103041651B - Pre-separation device for high temperature gas filter and filter adopting same - Google Patents
Pre-separation device for high temperature gas filter and filter adopting same Download PDFInfo
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- CN103041651B CN103041651B CN201210553516.XA CN201210553516A CN103041651B CN 103041651 B CN103041651 B CN 103041651B CN 201210553516 A CN201210553516 A CN 201210553516A CN 103041651 B CN103041651 B CN 103041651B
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Abstract
The invention provides a pre-separation device for a high temperature gas filter. The device comprises an outer separation barrel and an inner separation barrel axially sleeved with the outer separation barrel; inlets for gas to be separated and gas rotating flow passages thereof are formed at the upper parts of the inner separation barrel and the outer separation barrel respectively and are formed along the tangential directions of the barrel walls; a riser is arranged at the top of the inner separation barrel; the lower end of the inner separation barrel is connected with a cone contraction section with the diameter gradually reduced, and a discharge port; the lower end of the inner separation barrel is connected with a horn-shaped separation section of which the diameter is gradually increased; a ring-shaped discharge port of the outer separation barrel is formed by the horn-shaped separation section and the bottom end of the outer separation barrel; and a plurality of chute seams are arranged in the barrel wall of the contraction section peripherally and uniformly at intervals. According to the pre-separation device and the filter adopted by the same, dust loads at the upper and lower positions of a filter pipe can be uniformly distributed and dust bridging of the upper part of the filter pipe is reduced; energy consumption of the integral filtering system can be reduced; and separation efficiency and classification efficiency of the pre-separation device are well matched with operation parameters of the filter.
Description
Technical field
The invention relates to a kind of High Temperature Gas solid separation device, relate in particular to a kind of pre-separate device for high-temperature gas filter and filter thereof.
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 to carry out dedusting.Gas cleaning at high temperature is under hot conditions, directly to carry out gas solid separation, 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 simultaneously, saves equipment investment.
In the prior art, cyclone dust collection technology and gas filtering technique all can be used for the dust collecting process of high-temperature gas.
The equipment that cyclone dust collection technology adopts is cyclone separator, the operation principle of cyclone separator is: dusty gas tangentially enters separator, under special runner design, air-flow from top to bottom rotates, generation centrifugal force rotatablely moves, solid particle is because quality is large, the centrifugal force being subject to is also large, solid particle moves to barrel rapidly, lose speed with wall collision, along wall under the acting in conjunction of downward air-flow and gravity, be discharged from from dust-exhausting port downwards, fall into the ash bucket that enters cyclone separator bottom, and " getting rid of " fallen the air-flow of most of dust and upwards drawn by the riser of cyclone separator, thereby realize the separation of gas-solid two-phase.When conventional cyclone separator works alone, ash bucket bottom is sealed.The advantage of cyclone separator is without running gear, and operation and maintenance is simple; Shortcoming is higher to oarse-grained separative efficiency, lower to short grained separative efficiency, does not reach the dedusting requirement of industrial gasses, so, generally as pre-cleaner, reduce the live load of follow-up cleaner.
Gas filtration technology employing equipment is high-temperature gas filter, and the structure of high-temperature gas filter is as shown in Fig. 4 A, Fig. 4 B and Fig. 4 C.Filter seal is divided into two parts by the tube sheet 93 of filter 9, and bottom is divided into ash-laden gas side, and top is divided into clean gas side; Dusty gas (or being called crude synthesis gas) by the gas access 91 of filter after gas distributor 911 and crude synthesis gas riser 912, enter be filter ash-laden gas side, under the effect of gas push power, arrive each filter element 92, in each filter element 92, filter element 921 is installed, filter element 921 is ceramic filter tube or sintered metal filtration pipe.Conventionally in filter, 12 groups or 24 groups of filter elements 92 are installed, 48 screen pipes are installed in each filter element 92, screen pipe is arranged according to three angular separation such as grade in circular filter element, compact conformation.In filter process, dusty gas is entered in screen pipe by the hole on filtering material by the outer surface of screen pipe under the effect of pressure reduction, solid particle in gas is trapped within on the outer wall of screen pipe and forms muffin layer, clean gas is discharged and is entered clean gas side by the openend of screen pipe, discharges and enters subsequent technique through gas vent 95.Along with the carrying out of filter operation, the muffin layer progressive additive of screen pipe outer surface, cause the pressure drop of filter to increase, at this moment need to adopt the mode of blowback to realize the quality rebuilding of screen pipe, the air-flow of blowback is contrary with the airflow direction of filtration, when reverse gas cleaning, pulse valve 98 is opened, high pressure nitrogen in purge gas storage tank 99 or Clean synthesis gas moment enter in blowback pipeline 97, then the purge gas to the interior inject high pressure high speed of injector 94 of every group of filter element 92 tops of correspondence by the nozzle 96 on blowback pipeline, purge gas enters screen pipe inside after injector 94 diffusions, utilize the energy of transient state that the muffin layer of screen pipe outer surface is peeled off, make the resistance of screen pipe substantially return to original state, thereby realize the quality rebuilding of screen pipe.Dust falls into the ash bucket of filter, regularly removes.The advantage of high-temperature gas filter is: have very high filter efficiency, efficiency of dust collection can reach more than 99.9%, and the dust content after purifying in gas is less than 20mg/Nm
3, meet the requirement of gas purification completely.Its shortcoming is: the service behaviour of screen pipe is unstable, and service life is shorter, and phenomenon damaged and fracture often occurs, and causes screen pipe premature failure.Main cause is because the particle concentration in dust-laden process gas is higher, so the frequency of reverse gas cleaning is high, deashing causes screen pipe to be subject to more thermal shock frequently, easily there is fracture and damaged, this sharply rises the granule density that causes clean gas side, cause efficiency of dust collection to decline, affect subsequent technique, when serious, whole production system is forced to stop.
Based on above-mentioned situation, application number is that the patent application of 200810146809.X has proposed a kind of " composite flyash filter of built-in cyclone pre-dusting ", this patent application adopts cyclone separator as pre-separation equipment, cyclone separator is positioned over to the inside of pneumatic filter, pre-separate device and filter are integrated together, to reaching system architecture compactness, reduce the object of screen pipe dust load.
But at least there is following shortcoming in above-mentioned prior art in the process using:
(1) cyclone separator of the prior art is arranged on the filter element below of filter, the port of export of the gas-lift tube of cyclone separator is fixed on the upper end near filter element (screen pipe), the prior art does not take into full account the matching relationship between pre-separate device and filter element, easily causes the dust bridge phenomenon between screen pipe.
In filter element, occur that dust bridge phenomenon mostly occurs in the top of screen pipe, cause the reason of this phenomenon to be, from gas-lift tube crude synthesis gas out, after the tube sheet at arrival top, backflow downwards again, arrive each filter element, the prior art like this object of design is to make the direction of motion of dust-contained airflow identical with the direction of dust settling, prevents from being just subject at the dust of free settling the back-mixing that affects of air-flow.But, due to screen pipe upper end open, lower end closed, this causes screen pipe openend is different to the rate of filtration of blind end, the rate of filtration of the upper end of screen pipe is higher, the rate of filtration of lower end is lower, make the dust load skewness between screen pipe, and this structure of prior art makes dust-contained airflow arrive at first the top of screen pipe, again due to the screen pipe compactness of arranging, space between adjacent screen pipe is less, so easily cause screen pipe top that dust bridge occurs, build bridge after generation, the Stress non-homogeneity that causes screen pipe to be subject to, cause fracture and damaged in the process of blowback.
(2) the prior art does not fully match the performance of filter and pre-separate device.
Because conventional cyclone separator generally all works independently, bottom ash bucket seals, gas can only flow out from riser, when cyclone separator is arranged at filter interior as pre-separate device, dust-exhausting port and the riser of cyclone separator are all open in the same space, and the dusty gas of entering is to flow out from riser and dust-exhausting port two ends respectively, obviously, this wherein mobile has its particularity, and the result of study that can not simply apply mechanically conventional separator designs.
Analysis by the structure to the prior art and part service data can be found out, this cyclone separator is to design with reference to conventional cyclone separator, separator is higher to short grained classification efficiency, the pressure drop of separator self is larger, the energy consumption that has increased the weight of on the one hand whole filtration system, also can increase the weight of the wearing and tearing of cyclone separator self on the other hand, simultaneously, when design pre-separate device, also need to consider its classification efficiency, dust granules thing particle size distribution range in crude synthesis gas is wider, from 1 μ m to 500 μ m not etc., for existing filter, because screen pipe is microcellular structure, the micropore average pore size 10-15 μ m of outer surface, therefore, if pre-separate device is higher to short grained classification efficiency, will cause arriving in the dust-laden synthesis gas on screen pipe surface and contain too much fine dusts, these fine dusts can be deposited on the inside of screen pipe in the process of filtering, because the porous channel of screen pipe inside is irregular labyrinth type, so easily cause the obstruction of the micropore of screen pipe, cause the inefficacy of screen pipe.
(3) large (therefore, have to be arranged on the below of filter element) of the pre-separate device volume in the prior art, operation inconvenience, the cost of production, installation and debugging and the maintenance of pre-separate device is higher.
From the above mentioned, prior art does not accomplish reasonably to mate the relation between pressure drop (referring to the mistake flow resistance of pre-separate device itself), separative efficiency (Dust Capacity all separating accounts for the percentage that enters the total Dust Capacity in separator) and classification efficiency (separative efficiency of the dust granules to a certain particle size range) and the running parameter of filter of pre-separate device, thereby can not guarantee the stable of whole filtration system and continuation operation.
Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes a kind of pre-separate device for high-temperature gas filter and filter thereof, to overcome the defect of prior art.
Summary of the invention
The object of the present invention is to provide a kind of pre-separate device for high-temperature gas filter and filter thereof, the dust load of the upper and lower position of screen pipe is evenly distributed, reduce the dust bridge of part on screen pipe.
Another object of the present invention is to provide a kind of pre-separate device for high-temperature gas filter and filter thereof, the pressure drop of this pre-separate device self is less, thereby reduces the operation energy consumption of whole filtration system; This pre-separate device volume is compared with prior art less, therefore can optimize distribution, and makes filtration system compact conformation, and reduces production and the maintenance cost of pre-separate device.
Another object of the present invention is to provide a kind of pre-separate device for high-temperature gas filter and filter thereof, can make the separative efficiency of pre-separate device and classification efficiency well mate with filter operation parameter.
The object of the present invention is achieved like this, a kind of pre-separate device for high-temperature gas filter, and described pre-separate device comprises outer cylinder and is axially sheathed on the interior cylinder of outer cylinder inside; Separated space in described interior cylinder forms, the annular space between described interior cylinder and outer cylinder forms outer separated space; The top of described interior cylinder and outer cylinder is respectively equipped with along barrel tangential direction arranges separately gas access to be separated and gas rotating runner thereof; Described interior cylinder top is provided with riser, and interior cylinder lower end is connected with the taper contraction section of tapered diameter, and this contraction section bottom forms the discharge gate of interior cylinder; This interior cylinder lower end is also equipped with the tubaeform compartmented of diameter flaring, and described tubaeform compartmented and outer cylinder bottom form the annular discharge gate of outer cylinder; On the barrel of described contraction section, be evenly provided with multiple skewed slot seams along the circumferential interval of barrel, described skewed slot seam is identical with the swirling eddy direction of interior separated space inside along barrel cut-out direction from inside to outside.
In a preferred embodiments of the present invention, the barrel angle of the barrel of taper contraction section and interior cylinder is less than or equal to 30 ° for being greater than 0 °; The barrel angle of the barrel of tubaeform compartmented and interior cylinder is less than or equal to 45 ° for being greater than 0 °.
In a preferred embodiments of the present invention, the gas access to be separated of described interior cylinder and outer cylinder is set up in parallel, and two common conductings in gas access to be separated are in a crude synthesis gas inlet ductwork.
Object of the present invention can also realize like this, a kind of high-temperature gas filter, and the tube sheet of described filter is provided with filter element, at least comprises a screen pipe in described filter element; Filter seal is divided into the clean gas chamber on top and the dusty gas chamber of bottom by described tube sheet, and dusty gas chamber is provided with gas access, and clean gas chamber is provided with gas vent; Filter element top is provided with injector and the blowback pipeline corresponding with injector, and blowback pipeline one end is communicated in blowback air accumulator by pulse backblowing valve, and the blowback pipeline other end is provided with the nozzle of setting corresponding to injector top; Be positioned at filter element one side and neighbour's filter element and be provided with pre-separate device, described pre-separate device comprises outer cylinder and is axially sheathed on the interior cylinder of outer cylinder inside; Separated space in described interior cylinder forms, the annular space between described interior cylinder and outer cylinder forms outer separated space; The top of described interior cylinder and outer cylinder is respectively equipped with along barrel tangential direction arranges separately gas access to be separated and gas rotating runner thereof; Described interior cylinder top is provided with riser, and interior cylinder lower end is connected with the taper contraction section of tapered diameter, and this contraction section bottom forms the discharge gate of interior cylinder; This interior cylinder lower end is also equipped with the tubaeform compartmented of diameter flaring, and described tubaeform compartmented and outer cylinder bottom form the annular discharge gate of outer cylinder; On the barrel of described contraction section, be evenly provided with multiple skewed slot seams along the circumferential interval of barrel, described skewed slot seam is identical with the swirling eddy direction of interior separated space inside along barrel cut-out direction from inside to outside; The upper end of the contiguous described screen pipe in top of described riser, the lower end of the contiguous described screen pipe of annular discharge gate of described outer cylinder; The gas access to be separated of described interior cylinder and outer cylinder is communicated with the gas access of filter.
In a preferred embodiments of the present invention, the barrel angle of the barrel of taper contraction section and interior cylinder is less than or equal to 30 ° for being greater than 0 °; The barrel angle of the barrel of tubaeform compartmented and interior cylinder is less than or equal to 45 ° for being greater than 0 °.
In a preferred embodiments of the present invention, the gas access to be separated of described interior cylinder and outer cylinder is set up in parallel, and two common conductings in gas access to be separated are in a crude synthesis gas inlet ductwork.
In a preferred embodiments of the present invention, the tube sheet of described filter is provided with multiple filter elements, and each filter element comprises multiple screen pipes; Multiple pre-separate devices are set in described filter, and each pre-separate device is separately positioned between filter element.
In a preferred embodiments of the present invention, the crude synthesis gas inlet ductwork of each pre-separate device is communicated with the gas access of filter via a gas distributor.
From the above mentioned, the present invention, for pre-separate device and the filter thereof of high-temperature gas filter, can make the dust load of the upper and lower position of screen pipe be evenly distributed, and reduces the dust bridge of part on screen pipe; The pressure drop of described pre-separate device self is less, thereby reduces the operation energy consumption of whole filtration system; Can make separative efficiency and the classification efficiency of pre-separate device well mate with filter operation parameter.
Accompanying drawing explanation
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.Wherein:
Figure 1A: be the structural representation of high-temperature gas filter of the present invention.
Figure 1B: be the local structure for amplifying schematic diagram in Figure 1A.
Fig. 2 A: for the present invention is for the structural representation of the pre-separate device of high-temperature gas filter.
Fig. 2 B: be A-A sectional structure schematic diagram in Fig. 2 A.
Fig. 2 C: be B-B sectional structure schematic diagram in Fig. 2 A.
Fig. 2 D: for dusty gas leaks situation schematic diagram from skewed slot seam.
Fig. 2 E: be C-C sectional structure schematic diagram in Fig. 2 A.
Fig. 3: for the present invention is for the course of work schematic diagram of the pre-separate device of high-temperature gas filter.
Fig. 4 A: be the structural representation of existing filter.
Fig. 4 B: be the local structure for amplifying schematic diagram in Fig. 4 A.
Fig. 4 C: be the filter element arrangement schematic diagram in Figure 1A.
The specific embodiment
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing explanation the specific embodiment of the present invention.
The present invention proposes a kind of pre-separate device for high-temperature gas filter and filter thereof, and as shown in Figure 1A, Figure 1B, the tube sheet 93 of described high-temperature gas filter 100 is provided with filter element 92, at least comprises a screen pipe 921 in described filter element 92; Filter seal is divided into the clean gas chamber on top and the dusty gas chamber of bottom by described tube sheet 93, and dusty gas chamber is provided with gas access 91, and clean gas chamber is provided with gas vent 95; Filter element 92 tops are provided with injector 94 and the blowback pipeline 97 corresponding with injector 94, and blowback pipeline 97 one end are communicated in blowback air accumulator 99 by pulse backblowing valve 98, and blowback pipeline 97 other ends are provided with the nozzle 96 with the injector 94 corresponding settings in top; Be positioned at filter element 92 1 sides and neighbour's filter element and be provided with the pre-separate device 200 for high-temperature gas filter; As shown in Fig. 2 A～Fig. 2 E, described pre-separate device 200 comprises outer cylinder 1 and is axially sheathed on the interior cylinder 2 of outer cylinder 1 inside; Separated space in described interior cylinder 2 forms, the annular space between described interior cylinder 2 and outer cylinder 1 forms outer separated space; The top of described interior cylinder 2 and outer cylinder 1 is respectively equipped with along barrel tangential direction arranges separately gas access to be separated 11,21 and gas rotating runner 12,22 thereof; Described interior cylinder 2 tops are provided with riser 3, and interior cylinder 2 lower ends are connected with the taper contraction section 23 of tapered diameter, and these contraction section 23 bottoms form the discharge gate 25 of interior cylinder; These interior cylinder 2 lower ends are also equipped with the tubaeform compartmented 24 of diameter flaring, and described tubaeform compartmented 24 and outer cylinder 1 bottom form the annular discharge gate 13 of outer cylinder; On the barrel of described contraction section 23, be evenly provided with multiple skewed slot seams 231 along the circumferential interval of barrel, described skewed slot seam 231 is the swirling eddy direction identical (as shown in Figure 2 C) with interior separated space inside along barrel cut-out direction from inside to outside; The upper end of the contiguous described screen pipe 921 in top of described riser 3, the lower end of the annular discharge gate 13 contiguous described screen pipes 921 of described outer cylinder 1; The gas access to be separated 11,21 of described interior cylinder 2 and outer cylinder 1 is communicated with the gas access 91 of filter.
Further, as shown in Figure 2 A, in the present embodiment, the barrel angle α of the barrel of described taper contraction section 23 and interior cylinder 2 is less than or equal to 30 ° for being greater than 0 °; The barrel angle β of the barrel of described tubaeform compartmented 24 and interior cylinder 2 is less than or equal to 45 ° for being greater than 0 °.
The gas access to be separated 11,21 of described interior cylinder and outer cylinder is set up in parallel, and two common conductings in gas access 11,21 to be separated are in a crude synthesis gas inlet ductwork (not shown).
As shown in Figure 2 A, in the present embodiment, the tube sheet 93 of described filter 100 is provided with multiple filter elements 92, and each filter element 92 comprises multiple screen pipes 921; Described filter 100 is interior arranges multiple pre-separate devices 200, and each pre-separate device 200 is separately positioned in the gap between filter element 92 (arrangement mode can with reference to shown in figure 4C).The crude synthesis gas inlet ductwork of each pre-separate device 200 is communicated with the gas access 91 of filter via crude synthesis gas riser 912 and a gas distributor 911.
The crude synthesis gas of high dust content by the gas access 91 of filter 100 after gas distributor 911 and crude synthesis gas riser 912, be communicated with the crude synthesis gas inlet ductwork (not shown) of each pre-separate device 200, and be divided into two-way and enter respectively interior separated space and the outer separated space of pre-separate device 200, the gas access to be separated 11 of outer cylinder 1 and interior cylinder 2, 12 and gas rotating runner 12, 22 have adopted the intake method of scroll casing type, make like this dusty gas enter after spiral case, the entrance circular rector of air-flow is large, because incoming flow gas and dust can not impact the outer wall of riser 3, therefore can select the riser 3 that diameter is larger, to realize in the situation of pre-separate device size constancy, increase the treating capacity of gas, gas is before entering into separated space, first entrance at spiral case has separated most particle, therefore, be highly suitable for the operating mode of high dust content.
The course of work of interior separated space: as shown in dotted arrow and filled arrows in Fig. 3, the gas that contains dust tangentially enters interior cylinder 2, under scroll casing type runner design, produce and rotatablely move, the flow field of interior cylinder 2 is " binary vortices ", be the outer vortex (filled arrows) of axial downward movement and the inside vortex (dotted arrow) moving upward, outer eddy airstream moves downward along the wall of interior cylinder 2 in rotating, generation centrifugal force rotatablely moves, solid particle is because quality is large, the centrifugal force being subject to is also large, solid particle moves to barrel rapidly, lose speed with wall collision, under the acting in conjunction of the air-flow downward along barrel and gravity, move down, in arriving, the rear air-flow of the bottom taper contraction section 23 of cylinder 2 accelerates, centrifugal force increases, the bottom barrel of taper contraction section 23 has skewed slot seam 231, the otch of skewed slot seam 231 in face of the direction of swirling eddy (as Fig. 2 C, shown in Fig. 2 D), the effect of skewed slot seam 231 has three, one is the pressure drop that can reduce separator, the 2nd, increase separative efficiency, (skewed slot seam has played shunting action, when reaching gap position place, air-flow just has leakage, so the resistance of separator can reduce, pre-separate device of the present invention just in time needs a part of dust to leak from gap simultaneously, be convenient to dust granules discharges from gap, can reach so again the object that increases separative efficiency), the 3rd, can reduce downward air-flow vortex, because in separator bottom, sometimes have some air-flow vortexes and depart from mainstream gas, these air-flow whirlpools that depart from mainstream gas do not move upward, but along with flying dust moves downward, easily cause " reentrainment of dust ", there is back-mixing, skewed slot seam 231 can destroy downward eddying motion, suppress to a certain extent the generation of reentrainment of dust, improve anti-back-mixing ability.When dust-contained airflow arrives the position of skewed slot seam 231, dust can be divided into two parts and discharge by direction shown in arrow in Fig. 3 respectively.Discharge backward and be deposited in the ash bucket of filter 100 from discharge gate 25; And " getting rid of " fallen the dust-contained airflow of the inside vortex (in Fig. 3 shown in dotted arrow) of a part of dust and upwards drawn by the riser 3 of interior cylinder 2, enter the ash-laden gas side of filter 100, filter operation is carried out on the top that arrives the screen pipe 921 in each filter element 92.
The course of work of outer separated space: as shown in the hollow arrow in Fig. 3, dust-contained airflow tangentially direction enters the gas access to be separated 11 of outer cylinder 1, because this outer separated space does not arrange riser, so, dust-contained airflow can only move downward, form Spin-up section when arriving this tapered configuration of tubaeform compartmented 24() time, centrifugal force increases, when dust-contained airflow is thrown away from annular discharge gate 13, larger particle will be deposited in the ash bucket of filter 100 under the effect of centrifugal force, and dust concentration in the dust-contained airflow being thrown out of has reduced some relatively, then the dust-contained airflow of this part will arrive the bottom of screen pipe 921 in filter element 92.The duty ratio that makes like this upper and lower position of screen pipe 921 bear is more even, makes air-flow unobstructed, reduces the generation of dust bridge.
In the present embodiment, the effect of described tubaeform compartmented 24 is in order to prevent " gas blowby " and " back-mixing " phenomenon, the air-flow that prevents inside and outside separated space mixes, upset air velocity distribution, prevent that dust that interior separated space separates is carried to the bottom of screen pipe by the air-flow of outer separated space.For outer separated space, except preventing interior separated space generation gas blowby and back-mixing, the structure of flaring can also reach the object of the flow rotation acceleration making in outer separated space, reach certain separating effect (if outer separated space and interior separated space are all cylindric, there is no the words of tapered configuration, centrifugal force can not get strengthening, and does not reach the separating effect of expection).
Further, owing to being divided into two parts in the present invention during for pre-separate device 200 air inlet of high-temperature gas filter, except reaching above-mentioned effect, also reduced the overall pressure drop of pre-separate device.The main resistance of pre-separate device comes from interior separated space, and the energy loss of the riser 3 of interior cylinder 2 is larger; But, by an outer separated space (that is: outer cylinder 1), reducing the load of interior separated space, this just greatly reduces the resistance of interior separated space; Meanwhile, because outer separated space does not have riser, air-flow mainly moves downward, beyond the pressure drop meeting of separated space very low, reached the object that reduces pre-separate device 200 overall pressure drops by such design.
Because the present invention utilizes the barrel of interior cylinder as a part for outer separated space cleverly, make like this pre-separate device be actually the two-part parallel operation of inside and outside separated space, so, compared to existing technology, while processing the dust-contained airflow of same tolerance, the volume of pre-separate device of the present invention can be relatively little, and this has just reduced the cost such as production, installation and maintenance of pre-separate device.
In actual operating process, the operating pressure of filter, temperature, flow and dust concentration etc. keep stable state substantially.The structure of pre-separate device of the present invention and in filter 100 rational installation site, can reach as follows preferably parameter matching: the pressure drop summation of pre-separate device is less than 20% of filter element pressure drop summation, install after pre-separate device of the present invention, the total energy consumption of system increases by 20% when pre-separate device is not installed at most, pre-separate device total efficiency of separation is between 55～65%, dust more than Ex-all 30 μ m completely, when dusty gas enters respectively interior separated space and outer separated space, interior separated space is born 60～70% dusty gas load, outer separated space is born 30～40% dusty gas load.
From the above mentioned, the present invention compared with prior art at least has following beneficial effect:
(1) after pre-dedusting, the dust content in crude synthesis gas reduces, thereby has reduced the load of filter element, therefore can reduce the frequency of reverse gas cleaning, reduce the thermal shock to screen pipe, extended the service life of screen pipe, thereby guaranteed the stable operation of filtration system.
(2) can distribute the dust load of the upper and lower part of screen pipe, solve the problem that in prior art, easy generation dust bridge is divided on screen pipe top.
(3) effectively mate pressure drop, separative efficiency and the classification efficiency of pre-separate device and the operating parameter of filter, can stablize continuous firing after filter and pre-separate device are combined with each other.
(4) separator of this pre-separate device in compared to existing technology, when crude synthesis gas treating capacity is identical, size can be less, reduced the production of pre-separate device, the cost of operation and maintenance; Under identical size, there is higher live load than pre existing separator.
The foregoing is only the schematic specific embodiment of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, not departing from equivalent variations and the modification done under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.
Claims (8)
1. for a pre-separate device for high-temperature gas filter, it is characterized in that: described pre-separate device comprises outer cylinder and is axially sheathed on the interior cylinder of outer cylinder inside; Separated space in described interior cylinder forms, the annular space between described interior cylinder and outer cylinder forms outer separated space; The top of described interior cylinder and outer cylinder is respectively equipped with along barrel tangential direction arranges separately gas access to be separated and gas rotating runner thereof; Described interior cylinder top is provided with riser, and interior cylinder lower end is connected with the taper contraction section of tapered diameter, and this contraction section bottom forms the discharge gate of interior cylinder; This interior cylinder lower end is also equipped with the tubaeform compartmented of diameter flaring, and described tubaeform compartmented and outer cylinder bottom form the annular discharge gate of outer cylinder; On the barrel of described contraction section, be evenly provided with multiple skewed slot seams along the circumferential interval of barrel, described skewed slot seam is identical with the swirling eddy direction of interior separated space inside along barrel cut-out direction from inside to outside.
2. the pre-separate device for high-temperature gas filter as claimed in claim 1, is characterized in that: the barrel angle of the barrel of described taper contraction section and interior cylinder is less than or equal to 30 ° for being greater than 0 °; The barrel angle of the barrel of described tubaeform compartmented and interior cylinder is less than or equal to 45 ° for being greater than 0 °.
3. the pre-separate device for high-temperature gas filter as claimed in claim 1, is characterized in that: the gas access to be separated of described interior cylinder and outer cylinder is set up in parallel, and two common conductings in gas access to be separated are in a crude synthesis gas inlet ductwork.
4. a high-temperature gas filter, the tube sheet of described filter is provided with filter element, at least comprises a screen pipe in described filter element; Filter seal is divided into the clean gas chamber on top and the dusty gas chamber of bottom by described tube sheet, and dusty gas chamber is provided with gas access, and clean gas chamber is provided with gas vent; Filter element top is provided with injector and the blowback pipeline corresponding with injector, and blowback pipeline one end is communicated in blowback air accumulator by pulse backblowing valve, and the blowback pipeline other end is provided with the nozzle of setting corresponding to injector top; It is characterized in that: be positioned at filter element one side and neighbour's filter element and be provided with pre-separate device, described pre-separate device comprises outer cylinder and is axially sheathed on the interior cylinder of outer cylinder inside; Separated space in described interior cylinder forms, the annular space between described interior cylinder and outer cylinder forms outer separated space; The top of described interior cylinder and outer cylinder is respectively equipped with along barrel tangential direction arranges separately gas access to be separated and gas rotating runner thereof; Described interior cylinder top is provided with riser, and interior cylinder lower end is connected with the taper contraction section of tapered diameter, and this contraction section bottom forms the discharge gate of interior cylinder; This interior cylinder lower end is also equipped with the tubaeform compartmented of diameter flaring, and described tubaeform compartmented and outer cylinder bottom form the annular discharge gate of outer cylinder; On the barrel of described contraction section, be evenly provided with multiple skewed slot seams along the circumferential interval of barrel, described skewed slot seam is identical with the swirling eddy direction of interior separated space inside along barrel cut-out direction from inside to outside; The upper end of the contiguous described screen pipe in top of described riser, the lower end of the contiguous described screen pipe of annular discharge gate of described outer cylinder; The gas access to be separated of described interior cylinder and outer cylinder is communicated with the gas access of filter.
5. high-temperature gas filter as claimed in claim 4, is characterized in that: the barrel angle of the barrel of described taper contraction section and interior cylinder is less than or equal to 30 ° for being greater than 0 °; The barrel angle of the barrel of described tubaeform compartmented and interior cylinder is less than or equal to 45 ° for being greater than 0 °.
6. high-temperature gas filter as claimed in claim 4, is characterized in that: the gas access to be separated of described interior cylinder and outer cylinder is set up in parallel, and two common conductings in gas access to be separated are in a crude synthesis gas inlet ductwork.
7. high-temperature gas filter as claimed in claim 6, is characterized in that: the tube sheet of described filter is provided with multiple filter elements, and each filter element comprises multiple screen pipes; Multiple pre-separate devices are set in described filter, and each pre-separate device is separately positioned between filter element.
8. high-temperature gas filter as claimed in claim 7, is characterized in that: the crude synthesis gas inlet ductwork of each pre-separate device is communicated with the gas access of filter via a gas distributor.
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| CN103203143B (en) * | 2013-04-25 | 2014-08-27 | 中国石油大学(北京) | Combined filtering pipe for high-temperature gas filtering and filter provided with combined filtering pipe |
| CN111569537B (en) * | 2020-05-12 | 2021-12-03 | 宁波锦心节能环保科技有限公司 | Cyclone dust removal method |
| CN117883881B (en) * | 2024-03-14 | 2024-06-04 | 福建伊普思实业有限公司 | Gas-liquid separator and application method thereof |
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