CN110559758A - High-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust removal equipment - Google Patents
High-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust removal equipment Download PDFInfo
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- CN110559758A CN110559758A CN201910975883.0A CN201910975883A CN110559758A CN 110559758 A CN110559758 A CN 110559758A CN 201910975883 A CN201910975883 A CN 201910975883A CN 110559758 A CN110559758 A CN 110559758A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 71
- 239000012528 membrane Substances 0.000 title claims abstract description 69
- 238000007664 blowing Methods 0.000 title claims abstract description 55
- 239000000428 dust Substances 0.000 title claims abstract description 33
- 239000000779 smoke Substances 0.000 claims abstract description 56
- 238000009826 distribution Methods 0.000 claims abstract description 27
- 238000003860 storage Methods 0.000 claims abstract description 12
- 230000008929 regeneration Effects 0.000 description 38
- 238000011069 regeneration method Methods 0.000 description 38
- 238000011010 flushing procedure Methods 0.000 description 23
- 238000001914 filtration Methods 0.000 description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000003517 fume Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4272—Special valve constructions adapted to filters or filter elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
Abstract
The invention discloses a high-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust removal equipment, which comprises a high-pressure gas storage bag, a pulse back-blowing valve, a high-pressure air output pipe, a slow-release air distribution plate and a smoke exhaust gathering box, wherein the high-pressure gas storage bag is connected with the high-pressure air output pipe, the pulse back-blowing valve is arranged on the high-pressure air output pipe, the high-pressure air output pipe extends into a sub-cavity and is positioned above a ceramic membrane filter element, the opening direction of a high-pressure air outlet of the high-pressure air output pipe is vertically upward, the slow-release air distribution plate is oppositely arranged on a box body at the corresponding position of the upper end of the high-pressure air outlet, the smoke exhaust gathering box is arranged between the sub-cavities, a smoke exhaust port is arranged at the upper end of the. The invention avoids the problems of direct damage of high-pressure pulse air to the filter element and low working efficiency of low-pressure back blowing, prolongs the service life and reduces the use cost.
Description
Technical Field
the invention relates to the technical field of high-temperature dust-containing waste gas filtration, in particular to a high-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust removal equipment.
Background
In the current dust-containing high-temperature waste gas treatment method, because the high-temperature wall-flow ceramic membrane filter element has the advantages of high filtration precision (the interception rate below PM2.5 is more than 98%), large filtration area to filter volume ratio (more than 300), small wind resistance of the filter wall (the thickness of the filter wall is only 1.2mm, and the filtration wind resistance is less than 500 pa), low filtration power consumption, high temperature resistance (can be used in working condition environment below 900 ℃), and the like, more and more application cases are provided for using the filter element as a filtration source. However, since the high-temperature wall-flow ceramic membrane filter element is made of ceramic materials and is fragile, and the filter wall layer is thin, the high-temperature wall-flow ceramic membrane filter element is easy to break and the plug falls off under the high-speed impact of high-pressure air during high-pressure back-blowing regeneration. According to the condition in the earlier application case, high-pressure air of 0.3Mpa is adopted for back blowing regeneration, and the high-temperature wall-flow ceramic membrane filter element is continuously used for one month, so that the phenomena of breakage and plug falling occur, and the dust remover cannot be normally used. When the low air pressure (< 2500 pa) output by the pressure fan is used for back flushing regeneration, the pressure acting on the filter element is less than 1200pa, the regeneration effect is good, the high-temperature wall-flow ceramic membrane filter element is still intact for more than one year, and the dust remover operates normally.
from the case condition analysis, the high-temperature wall-flow ceramic membrane filter element can well play the filtering role of high precision and low power consumption only by controlling the pressure of a back-blowing regeneration air source acting on the high-temperature wall-flow ceramic membrane in a certain low-pressure air (less than 2500 pa) state. When the pressure fan air source is used as a back-blowing regeneration air source, the air pressure is low, the air delivery pipeline is large, the matched control valve is correspondingly increased, the opening and the closing can not be rapidly switched, the efficiency is reduced, the back-blowing time can not reach within 0.5 second, the back-blowing air quantity is increased, the load is invisibly increased for the smoke exhaust fan, and the treatment cost of dust-containing waste gas is increased. The best back blowing source is high-pressure air with high pressure, the control valve is a pulse back blowing valve, the on-off switching can be rapidly carried out, the switching time can be controlled within 0.5 second, larger surplus air quantity cannot be caused, and therefore extra load cannot be added to the smoke exhaust fan. However, if the high-pressure air back-blowing source directly acts on the high-temperature wall-flow ceramic membrane filter element, the high-speed high-pressure airflow can damage the filter body.
Disclosure of Invention
aiming at the problems brought by adopting a high-pressure direct back-blowing or low-pressure back-blowing mode in the aspect of dust-containing high-temperature waste gas treatment in the prior art, the invention provides a high-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust removal equipment, which effectively solves the problem that high-pressure air damages a high-temperature wall-flow ceramic membrane filter core when back-blowing regeneration is carried out on the high-temperature wall-flow ceramic membrane filter core, the structure is continuously used for more than one year, the high-temperature wall-flow ceramic membrane filter core is regenerated and back-blown by adopting the high-pressure air of 0.4Mpa, and the ceramic membrane filter core is still intact.
The technical scheme adopted by the technical problem to be solved by the invention is as follows: a high-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust-removing equipment comprises a high-pressure gas storage bag, a pulse back-blowing valve, a high-pressure air output pipe, a slow-release air distribution plate and a smoke exhaust collecting box, the high-pressure air storage bag is connected with a high-pressure air output pipe, the pulse back-blowing valve is arranged on the high-pressure air output pipe, the high-pressure air output pipe extends into each sub-cavity and is positioned above the ceramic membrane filter element, the opening direction of a high-pressure air outlet of the high-pressure air output pipe is vertically upward, a slow-release air distribution plate is oppositely arranged on the box body at the corresponding position of the upper end of the high-pressure air outlet, the exhaust fume collecting box is arranged among the sub-cavities in the high-temperature wall-flow ceramic membrane dust removal equipment, an exhaust port is arranged at the upper end of the exhaust fume collecting box corresponding to each sub-cavity, an exhaust fume lifting valve is arranged on the box body at the position corresponding to the upper end of the exhaust port, and the exhaust fume lifting valve is connected with an exhaust fume valve plate.
Furthermore, the cross section of the slow-release air distribution plate is square or arc.
if filtration and regeneration are carried out simultaneously, the high-pressure pulse slow release principle is adopted to carry out back-blowing regeneration on the high-temperature wall-flow ceramic membrane dust removal equipment, because the high-pressure air acting on the ceramic membrane filter body is less than 1200pa, the back-blown high-pressure air can be directly drawn away by the smoke exhaust fan after being slowly released by the slow release air distribution plate and can not act on the filter body, so that back-blowing regeneration can not be carried out on the filter body, the load of the smoke exhaust fan can also be increased, and therefore an off-line regeneration mode must be adopted.
The off-line regeneration mode is to divide the upper box body (the air outlet end after filtration) of the high-temperature wall-flow ceramic membrane dust removal equipment into more than two independent sub-cavities, and when one sub-cavity body is subjected to back-blowing regeneration, the other sub-cavities still perform filtering and dust removal work, so that the stable operation of the dust removal system is not influenced. The side surface of each cavity is respectively provided with a smoke exhaust pipe and a high-pressure air output pipe, all the high-pressure air output pipes are connected with the high-pressure gas storage bag through pulse back-blowing valves, and high-pressure back-blowing air output by the high-pressure air output pipes in the cavities uniformly releases the back-blowing air after being depressurized to each ceramic membrane filter element in a single cavity under the action of a buffer plate, so that the aim of low-pressure regeneration is fulfilled. The high-pressure air storage bag compresses an air source to an air compressor or a factory high-pressure air system pipeline. All exhaust ports are provided with exhaust smoke lifting valves and then connected with an exhaust smoke collection box, and the exhaust smoke collection box is connected with an exhaust fan.
the invention has the technical effects that: compared with the prior art, 1, when back flushing regeneration work is carried out, the cavity forms a relatively closed space, after high-pressure air enters a single cavity through the pulse back flushing valve, the high-pressure air directly acts on the slow-release air distribution plate at the corresponding position, the position and the shape of the slow-release air distribution plate can uniformly diffuse the high-pressure air, the volume of air in the cavity expands, meanwhile, the pressure at the bottom of the sub-cavity rapidly and uniformly rises, and the pressure acting on the filter body is basically consistent, so that back flushing regeneration is simultaneously carried out on each filter core body in the sub-cavity, the problems that the high-pressure pulse air directly damages the filter core bodies and the low working efficiency of low-pressure back flushing is solved, the service lives of the filter core bodies are prolonged, and the use cost of users is; 2. the pulse back-blowing valve is adopted, and compared with a butterfly valve, the pulse back-blowing valve is cheaper in price and simple in control, can meet requirements only by being connected with a factory air source, does not need to be additionally provided with a back-blowing fan and a back-blowing air pipe, and can reduce the manufacturing cost of equipment.
Drawings
figure 1 is a front view of the installation site of the present invention,
3 figure 3 2 3 is 3 a 3 schematic 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 of 3 figure 3 1 3, 3
Figure 3 is a schematic cross-sectional view taken along line B-B of figure 1,
FIG. 4 is a schematic diagram of the operation of filtration and high-pressure slow-release back-flushing according to the present invention,
Figure 5 is a cross sectional structure view of the cavity and the slow release air distribution plate,
Figure 6 is a longitudinal section structure diagram of the cavity and the slow-release air distribution plate,
Fig. 7 is a specific structural schematic diagram of the slow-release air distribution plate.
In the figure, 1, a vertical column 2, an observation manual hole 3, a lower cone 4, a high-pressure gas storage bag 5, a pulse back-blowing valve 6, a high-pressure air output pipe 7, a high-pressure air outlet 8, a slow-release air distribution plate 9, a left sub-cavity 10, a smoke exhaust lifting valve 11, a smoke exhaust valve plate 12, a sub-cavity partition plate 13, a smoke exhaust port 14, a top cover 15, a right sub-cavity 16, a ceramic membrane filter element 17, a filter element fixing pattern plate 18, a smoke exhaust collection box 19, a high-temperature dust-containing smoke inlet pipe 20, a dust discharging vibrator 21, a vertical column foundation 22, a dust discharging valve 23, a total smoke exhaust port 24, a box body 25 and a slow-release air distribution plate.
Detailed Description
as can be seen from fig. 1, 2, 3 and 4, the high-pressure pulse slow-release back-blowing structure for the high-temperature wall-flow ceramic membrane dust removal equipment is installed in the high-temperature wall-flow ceramic membrane dust removal equipment, the high-temperature wall-flow ceramic membrane dust removal equipment mainly comprises a box body 24, a top cover 14 and a high-temperature dust-containing flue gas inlet pipe 19 extending into the box body, the box body is supported by an upright post 1, the upright post is fixed by an upright post foundation 21, the upper end of the box body is internally divided into a plurality of sub-cavities (such as a left sub-cavity 9 and a right sub-cavity 15 in fig. 1) by sub-cavity partition plates 12, a plurality of ceramic membrane filter elements 16 (or filter bodies) fixed by filter element fixing flower plates 17 are arranged in each cavity, the lower end of the box body is connected with a lower cone 3, and an.
The high-pressure pulse slow-release back-blowing structure for the high-temperature wall-flow ceramic membrane dust removal equipment comprises a high-pressure gas storage bag 4, a pulse back-blowing valve 5, a high-pressure air output pipe 6, a slow-release air distribution plate 8 and a smoke exhaust gathering box 18, wherein the high-pressure gas storage bag 4 is connected with the high-pressure air output pipe 6, the pulse back-blowing valve 5 is arranged on the high-pressure air output pipe 6, the high-pressure air output pipe 6 extends into each sub-cavity and is positioned above a ceramic membrane filter element 16, the opening direction of a high-pressure air outlet 7 of the high-pressure air output pipe 6 is vertical upwards, the slow-release air distribution plate 8 is oppositely arranged on a box body 24 at the corresponding position at the upper end of the high-pressure air outlet 6, the cross section of the slow-release air distribution plate is square or arc and the like, the smoke exhaust gathering box 18 is arranged between the sub-cavities, a total smoke exhaust port 23, a smoke exhaust lifting valve 10 is arranged on the box body 24 at the corresponding position of the upper end of the smoke exhaust port 13, and the smoke exhaust lifting valve 10 is connected with a smoke exhaust valve plate 11.
As can be seen from fig. 5 and 6, if the smoke exhaust valve plate of the smoke exhaust lifting valve is closed in each sub-cavity, the sub-cavities form an independent closed space, and after a high-pressure back-blowing air source enters the sub-cavities, only the ceramic membrane filter element is the only pressure relief point, so that the back-blowing regeneration purpose can be achieved. As the ceramic membrane filter element belongs to a ceramic product, the ceramic membrane filter element has the advantages of thin filter wall layer, large porosity, good air passing performance, low back pressure and the like, but has poor high-pressure impact resistance, and easily causes the damage of the blocking heads at two ends of the high-temperature wall-flow ceramic membrane and the breakage of the ceramic membrane filter element under the condition of high-pressure impact. In order to solve the problem, the high-voltage pulse air source is required to act on the ceramic membrane filter element after being buffered and released. The cavity body is made of rigid materials (steel plates) except for a ceramic membrane filter element and a filter element fixing pattern plate at the bottom (the ceramic membrane filter element and the filter element fixing pattern plate form filtration), when a high-pressure pulse wind source directly outputs to the bottom, high-pressure wind can generate frontal impact on the ceramic membrane filter element, and the damage probability of the filter element is maximum; when the high-pressure pulse wind source outputs to four peripheral surfaces, the high-pressure wind collides with the wall surface, half of the high-pressure wind descends along the wall surface and quickly acts on the ceramic membrane filter element, and certain impact can be generated on the ceramic membrane filter element; only when the high-pressure pulse wind source is output towards the top end, the high-pressure wind is rapidly dispersed after being contacted with the top, the high-pressure air at the top goes down to enable the pressure at the bottom of the sub-cavity to gradually rise, so that the back flushing regeneration work of the ceramic membrane filter core is realized, and at the moment, the pressure applied to the filter core is released through the top buffer, the pressure drop amplitude is very large (through test tests, the wind pressure applied to the surface of the bottom filter core is less than 1200pa after the high-pressure pulse wind of 0.4Mpa is buffered at the top), and the damage to the ceramic membrane filter core is not enough. However, the top cover is necessary to be arranged and replaced for the ceramic membrane filter element conveniently, the top cover is composed of a top cover body, compression bolts and elastic sealing materials, and when high-pressure pulse wind impacts the top cover for a long time, the sealing performance of the top cover is affected. Aiming at the phenomenon, a buffer release plate is additionally arranged between the high-voltage pulse wind outlet and the top cover, so that the direct influence of the high-voltage pulse wind on the top cover is firstly solved, and the buffer release effect on the high-voltage pulse wind is played on the second side. The slow-release air distribution plate is installed in a butt joint mode with the sub-cavity body through bolts, and assembly and disassembly are convenient. The slow-release air distribution plate is made of Q235 or 304 stainless steel plates, the thickness of the steel plates is different according to different sizes of the sub-cavities, but the slow-release air distribution plate still has rigidity under the impact of high-pressure pulse air, and reinforcing ribs can be arranged at the top of the slow-release air distribution plate and fixed by slow-release air distribution plate mounting bolts 25.
The whole system of the invention is characterized in that dust removal and regeneration can be simultaneously carried out on-line operation in different sub-cavities, a single box body is in an off-line regeneration mode, and the working process is as follows:
1. checking before starting, wherein all valves are normally opened and closed, and the fan is normally opened and closed and operates;
2. And closing all pulse back-blowing valves, opening 2#, 3# and 4# smoke exhaust lifting valves connected with one sides of the second, third and fourth cavities, and then opening an exhaust fan connected with the smoke exhaust gathering box, and adjusting the frequency to meet the smoke exhaust requirements. The ceramic membrane filter elements in the second, third and fourth cavities filter the flue gas (as shown in the right half of fig. 4), the high-temperature dust-containing flue gas enters the cavities from the high-temperature dust-containing flue gas inlet pipe upwards (as shown in the right half arrow direction of fig. 4), and the high-temperature dust-containing flue gas is filtered by the ceramic membrane filter elements to become clean air and enters the smoke exhaust collection box from the smoke outlet and is discharged by the exhaust fan;
3. when the frequency of the exhaust fan rises to a certain value, a certain amount of dust is intercepted on the ceramic membrane filter element, and back flushing regeneration treatment is needed;
4. Opening a No. 1 smoke exhaust lifting valve, filtering smoke in a first cavity, closing a No. 2 smoke exhaust lifting valve, opening a No. 2 pulse back flushing valve, performing back flushing regeneration on a ceramic membrane filter element in a second cavity (as shown in the left half part of a figure 4), sealing a smoke exhaust port by the smoke exhaust valve plate due to closing of the smoke exhaust lifting valve, forming a relatively closed space in a sub-cavity, and uniformly diffusing high-pressure air (0.4 Mpa) in a high-pressure air storage bag after the high-pressure air enters the sub-cavity through the pulse back flushing valve, wherein the high-pressure air directly acts on an air distribution plate due to the upward opening of a high-pressure air outlet, expanding the volume of the air in the cavity, rapidly and uniformly rising the pressure at the bottom of the sub-cavity, and basically consistent pressure acting on the ceramic membrane filter element, thereby performing back flushing regeneration on each ceramic membrane;
5. After the back flushing regeneration of the ceramic membrane filter element in the second sub-cavity is finished, the 2# pulse back flushing valve is automatically closed, the 2# smoke exhaust lifting valve is opened, meanwhile, the 3# smoke exhaust lifting valve is closed, the 3# pulse back flushing valve is opened, and back flushing regeneration treatment is carried out on the ceramic membrane filter element in the third sub-cavity;
6. after the regeneration of the ceramic membrane filter element in the third sub-cavity is finished, the 3# blowback valve is automatically closed, the 3# smoke exhaust lifting valve is opened, the 4# smoke exhaust lifting valve is closed, the 4# pulse blowback valve is opened, and the ceramic membrane filter element in the fourth sub-cavity is subjected to blowback regeneration treatment;
7. The ceramic membrane filter element in the fourth sub-cavity is subjected to back-blowing regeneration, the 4# back-blowing valve is automatically closed, the 4# smoke exhaust lifting valve is opened, meanwhile, the 1# smoke exhaust lifting valve is closed, the 1# pulse back-blowing valve is opened, the ceramic membrane filter element in the first sub-cavity is subjected to back-blowing regeneration treatment,
8. After the first sub-cavity is subjected to back-blowing regeneration treatment, the 1# pulse back-blowing valve is automatically closed, the frequency of the smoke exhaust fan is reduced, the 1# smoke exhaust lifting valve is closed, the system stably works, the procedures are carried out when back-blowing regeneration is needed after the frequency of the smoke exhaust fan is increased in the next stage,
9. The above procedures are executed by an automatic control system, and only all working condition parameter values are required to be set, and one cavity is always used as a standby cavity, so that the system is ensured to run stably.
the invention divides the upper box body connected with the back-blowing air pipe and the smoke exhaust air pipe into a plurality of cavities which are mutually sealed, a plurality of ceramic membrane filter elements are fixed in each cavity, the side surface of each cavity is connected with the smoke exhaust pipe and the back-blowing air pipe, the execution is carried out by an automatic control system, only all working condition parameter values are required to be set, and one cavity is always used as a spare, thereby ensuring that the system can realize on-line filtration and pulse slow-release type low-pressure back-blowing cleaning, particles can not be formed on a filter body to stay, the back pressure of the filter body is small, the air pressure acted on the filter body by high-pressure air after pulse slow release is very small (< 1200 pa), the fatigue of the filter body is.
The back flushing regeneration principle of the high-voltage pulse slow-release back flushing method is as follows: the high-temperature wall-flow ceramic membrane is mainly determined by the characteristics of the high-temperature wall-flow ceramic membrane, belongs to a ceramic product, has the advantages of thin filtering wall layer, high porosity, good air passing performance, low back pressure and the like, but has poor high-pressure impact resistance, and easily causes the damage of blocking heads at two ends of the high-temperature wall-flow ceramic membrane and the breakage of a ceramic membrane filter core under the condition of high-pressure impact. Aiming at the characteristics of thin filter wall layer, large porosity, good air passing performance and low back pressure, the back blowing acting on the filter core body only needs to be slightly higher than the pressure of the air resistance (500 pa) of the filter core body, and the back blowing regeneration can be carried out on the filter core body. If filter simultaneously in same cavity and blowback regeneration work, because the high-pressure draught of blowback is very low (1200 pa) through the slowly-releasing back pressure of slowly-releasing grid plate, the blowback can be induced drafted the end suction, can't reach the blowback regeneration purpose to the filter element body, therefore design single box off-line blowback, single box is when filtering, and the blowback is out of work, induced drafts during the blowback and filters out of work, ensures that the blowback can carry out the effect of regeneration to the filter body. How to reduce and homogenize the pressure of the pulse high-pressure air acting on each filter body, and the slow-release air distribution plate plays a key role. When back flushing regeneration work is carried out, the air outlet end valve is closed, the cavity forms a relatively closed space, after high-pressure air (0.4 Mpa) with certain pressure enters a single cavity through the pulse back flushing valve, the high-pressure air is directly acted on the slow-release air distribution plate to be uniformly diffused, the volume of air in the cavity expands, meanwhile, the pressure at the bottom of the sub-cavity rapidly and uniformly rises, and the pressure acted on the ceramic membrane filter cores is basically consistent, so that back flushing regeneration is carried out on each ceramic membrane filter core in the sub-cavity at the same time. Because the back flushing is in an off-line state, more than two filtering cavities are needed, at least more than one cavity still operates during the back flushing, and the continuous and stable operation of the dust remover is ensured.
Claims (2)
1. A high-pressure pulse slowly-releasing blowback structure for high temperature wall flow formula ceramic membrane dust removal equipment which characterized in that: the device comprises a high-pressure gas storage bag (4), a pulse back-blowing valve (5), a high-pressure air output pipe (6), slow-release air distribution plates (8) and a smoke exhaust collection box (18), wherein the high-pressure gas storage bag (4) is connected with the high-pressure air output pipe (6), the pulse back-blowing valve (5) is arranged on the high-pressure air output pipe (6), the high-pressure air output pipe (6) extends into each sub-cavity and is positioned above a ceramic membrane filter element (16), the opening direction of a high-pressure air outlet (7) of the high-pressure air output pipe (6) is vertical upwards, the slow-release air distribution plates (8) are oppositely arranged on a box body (24) at the corresponding position of the upper end of the high-pressure air outlet (7), the smoke exhaust collection box (18) is arranged between the sub-cavities in the high-temperature ceramic membrane dust removal equipment, the upper end of the smoke exhaust collection box (18) is provided with, a smoke exhaust lifting valve (10) is arranged on the box body (24) at the corresponding position of the upper end of the smoke exhaust port (13), and the smoke exhaust lifting valve (10) is connected with a smoke exhaust valve plate (11).
2. the high-pressure pulse slow-release blowback structure for the high-temperature wall-flow ceramic membrane dust removal equipment according to claim 1, characterized in that: the cross section of the slow-release air distribution plate (8) is square or arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975883.0A CN110559758B (en) | 2019-10-15 | High-pressure pulse slow-release blowback structure for high-temperature wall-flow ceramic membrane dust removal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975883.0A CN110559758B (en) | 2019-10-15 | High-pressure pulse slow-release blowback structure for high-temperature wall-flow ceramic membrane dust removal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110559758A true CN110559758A (en) | 2019-12-13 |
| CN110559758B CN110559758B (en) | 2024-05-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068419A (en) * | 2020-01-14 | 2020-04-28 | 刘卫 | High-pressure pulse slow-release back-blowing equipment for high-temperature wall-flow ceramic membrane dust removal equipment |
| CN114307421A (en) * | 2021-11-15 | 2022-04-12 | 湖南健成科技有限公司 | Pulse control method for dust collector of powder tank |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229299Y (en) * | 1995-08-08 | 1996-06-19 | 首钢总公司 | Low-pressure pulse bag type dust-removing device |
| JP2001314720A (en) * | 2000-05-09 | 2001-11-13 | Nkk Corp | High-rate filtration bag filter |
| CN2766933Y (en) * | 2005-01-15 | 2006-03-29 | 王东强 | Compartment positioning circuit pulsation low-pressure reversal blower bag type dust collector |
| JP2012071237A (en) * | 2010-09-28 | 2012-04-12 | Technos Serve:Kk | Method and apparatus for monitoring pulse backwashing mechanism in powder collector |
| CN103977641A (en) * | 2014-04-21 | 2014-08-13 | 北京博智伟德环保科技有限公司 | Chambered blowback pressure-adjustable bag-type dust collector |
| CN105582754A (en) * | 2014-10-23 | 2016-05-18 | 哈尔滨金大环境工程有限公司 | A dry type low-pressure pulse blowing bag type dust collector and a dedusting method |
| CN205516927U (en) * | 2016-04-13 | 2016-08-31 | 山东新华联新能源科技有限公司 | Dust removal system |
| CN107137982A (en) * | 2017-07-14 | 2017-09-08 | 招商局重工（江苏）有限公司 | A kind of marine high-pressure compressed air is released protection device |
| CN208448856U (en) * | 2018-06-06 | 2019-02-01 | 劳卫东 | Filter bag ash removal device for bag filter |
| CN209173570U (en) * | 2019-06-03 | 2019-07-30 | 中节能（攀枝花）清洁技术发展有限公司 | A kind of environmental protection equipment for exhaust gas filtering |
| CN110102122A (en) * | 2019-06-05 | 2019-08-09 | 江西博鑫精陶环保科技有限公司 | A kind of high temperature wall flow type ceramic film filtering low-pressure reversal blower Breathing Method dedusting equipment |
| CN211069438U (en) * | 2019-10-15 | 2020-07-24 | 江西博鑫精陶环保科技有限公司 | High-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust removal equipment |
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229299Y (en) * | 1995-08-08 | 1996-06-19 | 首钢总公司 | Low-pressure pulse bag type dust-removing device |
| JP2001314720A (en) * | 2000-05-09 | 2001-11-13 | Nkk Corp | High-rate filtration bag filter |
| CN2766933Y (en) * | 2005-01-15 | 2006-03-29 | 王东强 | Compartment positioning circuit pulsation low-pressure reversal blower bag type dust collector |
| JP2012071237A (en) * | 2010-09-28 | 2012-04-12 | Technos Serve:Kk | Method and apparatus for monitoring pulse backwashing mechanism in powder collector |
| CN103977641A (en) * | 2014-04-21 | 2014-08-13 | 北京博智伟德环保科技有限公司 | Chambered blowback pressure-adjustable bag-type dust collector |
| CN105582754A (en) * | 2014-10-23 | 2016-05-18 | 哈尔滨金大环境工程有限公司 | A dry type low-pressure pulse blowing bag type dust collector and a dedusting method |
| CN205516927U (en) * | 2016-04-13 | 2016-08-31 | 山东新华联新能源科技有限公司 | Dust removal system |
| CN107137982A (en) * | 2017-07-14 | 2017-09-08 | 招商局重工（江苏）有限公司 | A kind of marine high-pressure compressed air is released protection device |
| CN208448856U (en) * | 2018-06-06 | 2019-02-01 | 劳卫东 | Filter bag ash removal device for bag filter |
| CN209173570U (en) * | 2019-06-03 | 2019-07-30 | 中节能（攀枝花）清洁技术发展有限公司 | A kind of environmental protection equipment for exhaust gas filtering |
| CN110102122A (en) * | 2019-06-05 | 2019-08-09 | 江西博鑫精陶环保科技有限公司 | A kind of high temperature wall flow type ceramic film filtering low-pressure reversal blower Breathing Method dedusting equipment |
| CN211069438U (en) * | 2019-10-15 | 2020-07-24 | 江西博鑫精陶环保科技有限公司 | High-pressure pulse slow-release back-blowing structure for high-temperature wall-flow ceramic membrane dust removal equipment |
Non-Patent Citations (2)
| Title |
|---|
| 于亮;: "刚性陶瓷滤管的脉冲反吹性能研究", 节能, no. 04 * |
| 刘后启;: "高压气箱脉冲和低压长袋管脉冲袋收尘器的比较", 中国水泥, no. 02 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068419A (en) * | 2020-01-14 | 2020-04-28 | 刘卫 | High-pressure pulse slow-release back-blowing equipment for high-temperature wall-flow ceramic membrane dust removal equipment |
| CN114307421A (en) * | 2021-11-15 | 2022-04-12 | 湖南健成科技有限公司 | Pulse control method for dust collector of powder tank |
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