CN102698546B - Pulse reverse blowing ash removal device of ceramic filter - Google Patents
Pulse reverse blowing ash removal device of ceramic filter Download PDFInfo
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- CN102698546B CN102698546B CN201210177784.6A CN201210177784A CN102698546B CN 102698546 B CN102698546 B CN 102698546B CN 201210177784 A CN201210177784 A CN 201210177784A CN 102698546 B CN102698546 B CN 102698546B
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Abstract
The invention relates to a pulse reverse blowing ash removal device of a ceramic filter. The pulse reverse blowing ash removal device is characterized in that a filtering unit and an air collecting chamber are arranged on a tube plate of the filter; a clean gas chamber is arranged at the upper part of the tube plate of the filter, and a dusty gas chamber is arranged at the lower part of the tube plate of the filter; the pulse reverse blowing ash removal device comprises a reverse blowing gas storage tank; a reverse blowing pipeline which is in tight coupling with the top of the gas collecting chamber of the filtering unit is arranged on the reverse blowing gas storage tank; a pulse reverse blowing valve is arranged in the reverse blowing pipeline; a clean gas leading-out pipeline is connected on the reverse blowing pipeline between the top of the gas collecting chamber and the pulse reverse blowing valve, and an outlet end of the clean gas leading-out pipeline is arranged in the clean gas chamber; a dust concentration monitoring meter, a gas outlet control valve and a flow meter are arranged in the clean gas leading-out pipeline; and a differential pressure sensor is arranged between the dusty gas chamber and an outlet at the top end of the gas collecting chamber of the filtering unit. The pulse reverse blowing ash removal device provided by the invention can realize the cyclic regeneration of a ceramic filter tube by adopting a lower reverse blowing pressure and reduces the possibility of fracture failure of the ceramic filter tube.
Description
Technical field
The invention relates to a kind of gas-solid separating device, relate in particular to a kind of action of low-voltage pulse back-blowing dust removing device of ceramic filter.
Background technology
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 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 the common difficulty running in commercialized development process, and its object one is protection gas turbine blades and upstream device, and the 2nd, make the flue gas of discharging meet environmental protection standard.Ceramic filter is acknowledged as the most potential high temperature gas-solid isolation technics, can remove particles more than 5 μ m, and outlet dust content is less than 1mg/Nm
3, separative efficiency reaches 99.99%.
The filter element of high-temperature filter mainly adopts the mode of monolayer alignment, take ceramic filter as example, filter is divided into upper and lower two parts by the tube sheet of filter, top is divided into clean gas side, bottom is divided into ash-laden gas side, filter only has one deck tube sheet, and multiple ceramic filter elements (ceramic chimney filter) are suspended on tube sheet.Described multiple ceramic filter element (ceramic chimney filter) is divided into again many groups to be arranged, every group shares an injector.
Pulse backblowing deashing device is the important guarantee of ceramic filter stable operation.The Pulse anti-blow device of the ceramic filter of existing commercial Application as shown in Figure 3A, Pulse anti-blow device is mainly made up of purge gas storage tank 91, pulse backblowing valve 92, blowback pipeline and nozzle 921, and the nozzle 921 of described blowback pipeline keeps certain distance (that is: blowback pipeline is not directly connected with injector) with the injector 93 of ceramic filter.The inner space of ceramic filter is divided into clean gas side and ash-laden gas side by filter tube sheet 94, a filter element is made up of many ceramic chimney filters 95, a common filter element is provided with 48 chimney filters, as shown in 3B in figure, on circular filter element tube sheet, ceramic chimney filter be according to etc. triangular pattern arrange.A filter element (12 or 24 filter elements are installed conventionally) is at least installed on the tube sheet 94 of filter.Dusty gas or the dust-laden side that is called crude synthesis gas and is entered filter by the gas access 96 of filter, arrive ceramic chimney filter 95 surfaces.Dust removal by filtration process is carried out at the outer surface of ceramic chimney filter 95, along with the carrying out of filtering, cake layer thickens, the pressure drop of filter raises, in the time that pressure drop is increased to a certain degree, according to the predefined time interval, adopt high pressure nitrogen or synthesis gas to divide into groups to carry out pulse backblowing to filter element (ceramic chimney filter) 95, realize the quality rebuilding of chimney filter.After first group of filter element blowback, second group of blowback behind certain hour interval, then the 3rd group of blowback behind certain hour interval, until the equal blowback of all filter elements is complete.High pressure purge gas, through chimney filter inwall, utilizes the energy of transient state that the dust layer of chimney filter outer wall is blown off, and dust falls into ash bucket 98.Gas after filtration, enters the shared air chamber being made up of injector 93, enters afterwards clean gas side, discharges and enters subsequent technique through gas vent 97.
The typical duty parameter of above-mentioned technique is: 340 ℃ of filter operation temperature, and operating pressure is about 4MPa, adopts high pressure nitrogen or technique synthesis gas as blowback makings when pulse dust cleaning, and blowback pressure is about 8MPa, and blowback temperature is greater than 225 ℃.The refractory ceramics wave filter of application, usually because the fracture of ceramic chimney filter causes downstream concentration to rise sharply, makes device be forced to stop at present.The design of existing Pulse anti-blow device and high-pressure pulse deashing operation are unfavorable for the long-period stable operation of filter, have following subject matter:
(1) pulse backblowing hypertonia: blowback air-flow need to overcome the inertia force of operating pressure, the flow resistance of filtered airflow and the gas of clean gas side of filter, and blowback air-flow 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, blowback pressure is up to 8MPa, pottery chimney filter is subject to very large gas shock, pulse backblowing deashing causes chimney filter vibration, and blowback pressure is higher, and the vibration Shaoxing opera of ceramic chimney filter is strong.A little less than ability of anti-deformation due to ceramic chimney filter, therefore its fracture failure phenomenon is very general in commercial Application.Research shows, this high pressure deashing operation is the most important reason that chimney filter generation fatigue fracture was lost efficacy.
(2) can only adopt timing blowback mode, cannot dynamically adjust blowback parameter: due to the design reasons of filtration device structure, in running, cannot judge the pressure reduction of every group of filter element, can only be according to operating experience, according to predefined blowback cycle start by set date back-blowing device.In practical operation, the operating load of each filter element is differentiated, operation operating mode has fluctuation also time, cause the pressure drop of every group of filter element inconsistent, for the difference between different operating condition and filter element, cannot adjust in time the reverse gas cleaning cycle, affect the efficient stable operation of whole system.
(3) chimney filter fracture failure has a strong impact on subsequent technique: even if a ceramic chimney filter ruptures, the crude synthesis gas on ash-laden gas side can enter clean gas side by post-rift ceramic chimney filter, there is air-flow " short circuit " phenomenon, dust content in the gas in downstream is sharply increased, make whole device be forced to stop, have a strong impact on subsequent production technique.
(4) " backflow " phenomenon affects the circular regeneration performance of ceramic chimney filter: in the time that pulse backblowing approaches end, purge gas speed reduces gradually, in this process, the pressure of chimney filter inside is less than the pressure of its outside, near gas chimney filter outer wall there will be by pipe outside by tube wall the backflow phenomenon to pipe flows inside, the solid particle that the pipe outer wall from screen pipe has blown off is deposited in its outer wall again, even can make part granule wear is embedded in tube wall, affect filter quality and the efficiency of next filtration cycle, reduce the service life of chimney filter.
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 ceramic filter, to overcome the defect of prior art.
Summary of the invention
The object of the present invention is to provide a kind of pulse backblowing deashing device of ceramic filter, can adopt lower blowback pressure to realize the circular regeneration of ceramic chimney filter, reduce the possibility of ceramic chimney filter fracture failure; Can monitor pressure drop and the air flow rate etc. of filter element, be convenient to dynamically adjust blowback parameter, be conducive to filter operation steady in a long-term.
Another object of the present invention is to provide a kind of pulse backblowing deashing device of ceramic filter, can, to every group of filter element independent operation, there is safety protection function; Can not affect subsequent technique.
The object of the present invention is achieved like this, a kind of pulse backblowing deashing device of ceramic filter, and the tube sheet of described ceramic filter is provided with filter element, and filter element top is provided with collection chamber; Filter seal is divided into the clean gas chamber on top and the dusty gas chamber of bottom by filter tube sheet; Described pulse backblowing deashing device includes blowback air accumulator, blowback air accumulator is provided with the blowback pipeline being connected with the collection chamber top seal of filter element, in described blowback pipeline, be provided with pulse backblowing valve, on the blowback pipeline between collection chamber top and pulse backblowing valve, be connected with clean gas and draw pipeline, the port of export that this clean gas is drawn pipeline is positioned at clean gas chamber; Described clean gas is drawn and in pipeline, is provided with dust concentration monitoring meter, gas vent control valve and flowmeter; Between dusty gas chamber and the outlet of filter element collection chamber top, be connected with differential pressure pick-up; Described pulse backblowing valve, dust concentration monitoring meter, gas vent control valve, flowmeter and differential pressure pick-up are electrically connected with a control module.
In a preferred embodiments of the present invention, the tube sheet of described ceramic filter is provided with many group filter elements; The collection chamber top of the described every group of filter element blowback pipeline that is tightly connected respectively; Between the collection chamber top outlet of described every group of filter element and dusty gas chamber, a differential pressure pick-up is all set.
In a preferred embodiments of the present invention, in described every group of filter element, at least comprise a filter element.
In a preferred embodiments of the present invention, described filter element is ceramic chimney filter.
In a preferred embodiments of the present invention, described collection chamber be shaped as round platform or terrace with edge shape.
From the above mentioned, the pulse backblowing deashing device of ceramic filter of the present invention, due to direct airtight being connected of blowback pipeline end and collection chamber top, (described blowback pipeline end does not have nozzle, reduce filtering gas and collect rear mobile resistance, backflowing gas amount while increasing deashing operation, reduce the resistance of blowback air-flow) simultaneously, collection chamber and blowback pipeline have formed an enclosure space, blowback air-flow only need to overcome the operating pressure of filter, when blowback, filtered airflow within the extremely short time in halted state, the resistance of filtered airflow does not almost affect, the air-flow of blowback simultaneously will all enter in collection chamber, after collection chamber diffusion, enter ceramic filtering pipe, energy loss is very little during this time, therefore, can adopt lower blowback pressure to realize the circular regeneration of ceramic chimney filter, can reach good ash-removal effect, also reduced the possibility of ceramic chimney filter fracture failure, in pulse backblowing deashing device of the present invention, be provided with the pulse backblowing valve, dust concentration monitoring meter, gas vent control valve, flowmeter and the differential pressure pick-up that are electrically connected with control module, can monitor pressure drop and the air flow rate etc. of filter element, be convenient to dynamically adjust blowback parameter, be conducive to filter operation steady in a long-term.
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:
Fig. 1: be structural representation Fig. 1 of the pulse backblowing deashing device of ceramic filter of the present invention.
Fig. 2 A: be structural representation Fig. 2 of the pulse backblowing deashing device of ceramic filter of the present invention.
Fig. 2 B: be the schematic diagram 2 of arranging of filter element in the pulse backblowing deashing device of ceramic filter of the present invention.
Fig. 2 C: be the schematic diagram 2 of arranging of filter element in the pulse backblowing deashing device of ceramic filter of the present invention.
Fig. 3 A: be the structural representation of existing ceramic filter.
Fig. 3 B: be the schematic diagram of arranging of filter element in existing ceramic filter.
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.
As shown in Figure 1, the present invention proposes a kind of pulse backblowing deashing device of ceramic filter, and the tube sheet 5 of described ceramic filter is provided with filter element 6, and filter element 6 tops are provided with collection chamber 7; Filter seal is divided into the clean gas chamber 81 on top and the dusty gas chamber 82 of bottom by filter tube sheet 5, and described clean gas chamber 81 is provided with gas vent 811, and described dusty gas chamber 82 is provided with gas feed 821; Described pulse backblowing deashing device includes blowback air accumulator 1, blowback air accumulator 1 is provided with the blowback pipeline 2 being connected with collection chamber 7 top seals of filter element, in described blowback pipeline 2, be provided with pulse backblowing valve 21, on the blowback pipeline 2 between collection chamber 7 tops and pulse backblowing valve 21, be connected with clean gas and draw pipeline 3, the port of export that this clean gas is drawn pipeline 3 is positioned at clean gas chamber 81; Described clean gas is drawn and in pipeline 3, is provided with dust concentration monitoring meter 31, gas vent control valve 32 and flowmeter 33; Between dusty gas chamber 82 and the 7 top outlets of filter element collection chamber, be connected with differential pressure pick-up 4; Described pulse backblowing valve 21, dust concentration monitoring meter 31, gas vent control valve 32, flowmeter 33 and differential pressure pick-up 4 are electrically connected with a control module (not shown).
From the above mentioned, the pulse backblowing deashing device of ceramic filter of the present invention, due to direct airtight being connected of blowback pipeline end and collection chamber top, (described blowback pipeline end does not have nozzle, reduce filtering gas and collect rear mobile resistance, backflowing gas amount while increasing deashing operation, reduce the resistance of blowback air-flow) simultaneously, collection chamber and blowback pipeline have formed an enclosure space, blowback air-flow only need to overcome the operating pressure of filter, when blowback, filtered airflow within the extremely short time in halted state, the resistance of filtered airflow does not almost affect, the air-flow of blowback simultaneously will all enter in collection chamber, after collection chamber diffusion, enter ceramic filtering pipe, energy loss is very little during this time, therefore, can adopt lower blowback pressure to realize the circular regeneration of ceramic chimney filter, can reach good ash-removal effect, also reduced the possibility of ceramic chimney filter fracture failure, in pulse backblowing deashing device of the present invention, be provided with the pulse backblowing valve, dust concentration monitoring meter, gas vent control valve, flowmeter and the differential pressure pick-up that are electrically connected with control module, can monitor pressure drop and the air flow rate etc. of filter element, be convenient to dynamically adjust blowback parameter, be conducive to filter operation steady in a long-term.
Further, shown in A, in the present embodiment, on the tube sheet 5 of described ceramic filter, can be provided with many group filter elements 6 as shown in Figure 1, Figure 2; Collection chamber 7 tops of the described every group of filter element 6 blowback pipeline 2 that is tightly connected respectively, in every blowback pipeline 2, be connected with corresponding clean gas and draw pipeline 3, described each clean gas is drawn and in pipeline 3, is provided with dust concentration monitoring meter 31, gas vent control valve 32 and flowmeter 33; Between the collection chamber 7 top outlets of described every group of filter element and dusty gas chamber 82, a differential pressure pick-up 4 is all set.Can, to every group of filter element independent operation, there is safety protection function; After any one filter element 6 damages, the gas vent control valve 32 that corresponding clean gas can be drawn in pipeline 3 is closed, and thus, can not affect subsequent technique.
In the present embodiment, described dust concentration monitoring meter, the variation of reaction particles substrate concentration real-time, the gas that is positioned at each group filter element is drawn on pipeline.Described gas vent control valve, adopts high-temperature-resistant high-pressure-resistant ball valve or other forms of valve, by switching electronic or pneumatic or hydraulic way by-pass valve control.Described flowmeter, for measuring the tolerance of every group of filter element, is positioned at gas and draws the optional position of pipeline.Described differential pressure pick-up and flow are taken into account concentration monitor data formation information feedback, are convenient to adjust pulse backblowing deashing scheme according to actual condition.
In the present embodiment, described pulse backblowing valve 21 is pneumatic operated valve or motor-driven valve; This pulse backblowing valve is positioned at the top of High Temperature Ceramic Filter space outerpace.
As shown in Figure 1, the wherein part that described clean gas is drawn pipeline 3 shares with blowback pipeline 2, can facilitate line arrangement, saves space; Gas is drawn pipeline and is first extended to outside filter, then returns in the clean gas chamber 81 of filter, is convenient to that dust concentration monitoring meter 31, gas vent control valve 32 and flowmeter 33 are arranged on to filter and operates outward.The part being positioned at outside filter has heat-insulation layer, reduces heat loss.
In the present embodiment, in described every group of filter element 6, at least comprise a filter element 61, many filter elements 61 are also installed.Described filter element 61 is ceramic chimney filter.
Further, the present invention is owing to adopting low-pressure reversal blower ash-clearing technology, in the time many ceramic chimney filters 61 being installed in every group of filter element 6, the arrangement form of pottery chimney filter 61 both can identical with the arrangement mode of ceramic chimney filter in existing ceramic filter (as shown in Figure 2 B), also can adopt the arrangement mode of rectanglar arrangement (as shown in Figure 2 C) or other any shapes.According to the arrangement mode of chimney filter, the shape of collection chamber 7 can flexible transformation, and in the present embodiment, the shape of described collection chamber 7 can be truncated conical shape, also can be other shapes such as terrace with edge.
Below the pulse backblowing deashing device of ceramic filter of the present invention is further illustrated.
As shown in Figure 1, be about under the working condition of 4MPa at 340 ℃ of high-temperature filter operating temperatures, operating pressure, crude synthesis gas is from gas feed 821, after gas distributor and riser, enter filter interior, filter is divided into two parts by tube sheet 5, under tube sheet, is dusty gas chamber 82, is clean gas chamber 81 on tube sheet.As shown in the hollow arrow in Fig. 1, dust-contained airflow arrives the ceramic chimney filter 61 in each filter element 6, dust is intercepted at ceramic chimney filter 61 surfaces, form cake layer, the air-flow after being filtered is clean synthesis gas, is pooled to the collection chamber 7 of every group of filter element 6 after ceramic chimney filter 61, drawing pipeline 3 along clean gas is afterwards led to behind filter outside by filter interior, return in the clean gas chamber 81 of filter, discharge by gas vent 811, enter subsequent technique unit.
Every group of filter element 6 can independently operate; Clean gas is drawn on pipeline 3 dust concentration monitoring meter 31 and flowmeter 33 is installed, and monitors in real time the change in concentration trend of clean gas and the traffic load of every group of filter element, in gas vent control valve 32 filter processes, keeps normally open.
Along with the carrying out of filter operation, pottery chimney filter 61 cake layers constantly thicken, the pressure drop of each filter element 6 that differential pressure pick-up 4 records increases, due to ceramic chimney filter 61 performance differences of each group of filter element 6, the difference that crude synthesis gas distributes at the air-flow of each group of filter element 6 simultaneously, causes the change in pressure drop of every group of filter element 6 inconsistent.Adopt the poor purge mode of level pressure, be that each group of filter element 6 carries out reverse gas cleaning (existing apparatus practical operation while reaching the voltage drop value of deashing requirement, due to the reason of back-blowing device structural design, can only adopt timing blowback to every group of filter element, the blowback setting parameter of all filter elements is unified value, and operating flexibility is poor).When reverse gas cleaning, the manner of execution of differential pressure pick-up 4 trigger impulse back-flushing valves 21 and gas discharge control valve 32: gas vent control valve 32 is closed, 21 moments of pulse backblowing valve open (according to actual requirement, duration 200～1000ms), in blowback air accumulator 1, pressure is about high pressure nitrogen or the Clean synthesis gas of 4.2-4.5MPa (the about 8MPa of existing apparatus blowback pressure), enter in collection chamber 7 along blowback pipeline 2, after the interior supercharging of collection chamber 7, enter ceramic filtering pipe 61, the transient energy of blowback air-flow is peeled off the cake layer that sticks to ceramic chimney filter 61 outside wall surface, fall into ash bucket.Complete after blowback, gas vent control valve 32 is opened.Manner of execution by two valves coordinates, and prevents from blowback process that blowback air-flow is drawn pipeline 3 by gas to enter into clean gas chamber, causes blowback effect to reduce, and avoids the generation of backflow phenomenon simultaneously, is conducive to the stable operation of filter.
While there is fracture in the ceramic chimney filter 61 of some or several filter elements 6, information is fed back to control module by differential pressure pick-up 4, flowmeter 33 and dust concentration monitoring meter 31: filter element 6 voltage drop values diminish, every group of filter element flow becomes large, exit concentration and suddenly increase, control module carries out after logic decision, close pulse backblowing valve 21 and gas discharge control valve 32, this filter element 6 is quit work, other filter elements 6 normally operate, and can not affect subsequent production technique.
The pulse backblowing deashing device of ceramic filter of the present invention compared with prior art has the following advantages:
(1) lower deashing pressure, higher deashing intensity.
When conventional high-pressure pulse back-blowing, blowback air-flow need to overcome the inertia force of operating pressure, the flow resistance of filtered airflow and the gas of clean gas side of filter, therefore need the deashing pressure of about 8MPa left and right, and back-blowing device of the present invention, use the deashing pressure of about 4.2MPa-4.5MPa can realize the quality rebuilding of ceramic chimney filter, and deashing intensity and uniformity better.
(2) reduce backflowing gas amount consumption, cost-saving.
Because blowback pressure is lower, the required backflowing gas amount consumption of single blowback is few.Industrial field devices is used nitrogen or technique synthesis gas as blowback source of the gas, and production cost is high, uses this technology can significantly reduce the cost of blowback air.
(3) reduce the possibility of ceramic chimney filter fracture failure.
Research shows, vibration and the thermal shock effect maximum of blowback pressure to ceramic chimney filter is the main cause that causes its premature failure to lose efficacy.Therefore, do not affecting under the prerequisite of ash-removal effect, greatly reducing after blowback pressure, the thermal shock of purge gas on ceramic chimney filter and the impact of vibration also reduce thereupon, have extended the service life of ceramic chimney filter.
(4) safety precautions, does not affect subsequent technique.
Once ceramic chimney filter ruptures, concentration monitor device, flowmeter and differential pressure pick-up etc. that gas is drawn on pipeline can detect anomaly in time, control module is received after information feedback, this group filter element gas is drawn to the valve closing on pipeline, prevent that downstream concentration is too high and device is stopped.The High Temperature Ceramic Filter of industrial application generally comprises tens filter elements, closes one group or several groups, less to whole system influence on system operation.
(5) can realize deashing operation under optimum blowback operating parameter.
Utilize differential pressure pick-up on every group of filter element and the implementing monitoring of flowmeter, adjust the blowback parameter (blowback pressure and blowback cycle etc.) of each group of filter element, realize the efficient deashing under different operating conditions.Avoid under underrun operating mode deashing frequency too high, and the problem of deashing underfrequency under extreme loads operating condition.
(6) avoided the adverse effect of backflow phenomenon.
(7) the present invention can directly apply to existing High Temperature Ceramic Filter, and transformation is convenient.
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 (5)
1. a pulse backblowing deashing device for ceramic filter, the tube sheet of described ceramic filter is provided with filter element, and filter element top is provided with collection chamber; Filter seal is divided into the clean gas chamber on top and the dusty gas chamber of bottom by filter tube sheet; It is characterized in that: described pulse backblowing deashing device includes blowback air accumulator, blowback air accumulator is provided with the blowback pipeline being connected with the collection chamber top seal of filter element, in described blowback pipeline, be provided with pulse backblowing valve, on the blowback pipeline between collection chamber top and pulse backblowing valve, be connected with clean gas and draw pipeline, the port of export that this clean gas is drawn pipeline is positioned at clean gas chamber; Described clean gas is drawn and in pipeline, is provided with dust concentration monitoring meter, gas vent control valve and flowmeter; Between dusty gas chamber and the outlet of filter element collection chamber top, be connected with differential pressure pick-up; Described pulse backblowing valve, dust concentration monitoring meter, gas vent control valve, flowmeter and differential pressure pick-up are electrically connected with a control module.
2. the pulse backblowing deashing device of ceramic filter as claimed in claim 1, is characterized in that: the tube sheet of described ceramic filter is provided with many group filter elements; The collection chamber top of the described every group of filter element blowback pipeline that is tightly connected respectively; Between the collection chamber top outlet of described every group of filter element and dusty gas chamber, a differential pressure pick-up is all set.
3. the pulse backblowing deashing device of ceramic filter as claimed in claim 2, is characterized in that: in described every group of filter element, at least comprise a filter element.
4. the pulse backblowing deashing device of ceramic filter as claimed in claim 3, is characterized in that: described filter element is ceramic chimney filter.
5. the pulse backblowing deashing device of ceramic filter as claimed in claim 1, is characterized in that: described collection chamber be shaped as round platform or terrace with edge shape.
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