CN210874484U - Circulating fluidized bed method flue gas purification system and integrated connecting device thereof - Google Patents
Circulating fluidized bed method flue gas purification system and integrated connecting device thereof Download PDFInfo
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- CN210874484U CN210874484U CN201921564468.8U CN201921564468U CN210874484U CN 210874484 U CN210874484 U CN 210874484U CN 201921564468 U CN201921564468 U CN 201921564468U CN 210874484 U CN210874484 U CN 210874484U
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Abstract
The utility model relates to a circulating fluidized bed method flue gas purification system and an integrated connecting device thereof, wherein, the integrated connecting device comprises a bag-type dust remover and a flue; the top end of the bag-type dust remover is provided with an air inlet, the bottom end of the bag-type dust remover is provided with an air outlet, the air inlet is communicated with an air outlet of a desulfurization reaction tower of the circulating fluidized bed method flue gas purification system, and the air outlet is communicated with a denitration reaction tower of the circulating fluidized bed method flue gas purification system through a flue; the front end of the flue is communicated with the gas outlet along the vertical direction, so that the whole occupied space of the circulating fluidized bed method flue gas purification system can be reduced, the possibility of the whole arrangement of the circulating fluidized bed method flue gas purification system is improved in a limited field space, and the flue gas emission requirement is met.
Description
Technical Field
The utility model relates to a fume equipment technical field, concretely relates to circulating fluidized bed method gas cleaning system and integrated connecting device thereof.
Background
The circulating fluidized bed method flue gas purification system comprises a desulfurization reaction tower, a bag-type dust remover, a denitration reaction tower, a material circulating system, an absorbent preparation and supply system, a flue gas system, a process water system, a fluidized air system and the like. The main process production devices and the auxiliary facilities are arranged around the desulfurization reaction tower in a centralized manner according to the process requirements, wherein the desulfurization reaction tower, the bag-type dust remover and the denitration reaction tower are arranged in sequence.
The outlet flue gas of the desulfurization reaction tower is filtered by the bag-type dust collector and then enters the denitration reaction tower along the flue, and because the temperature of the filtered flue gas is usually about 70-100 ℃, the flue gas introduced into the denitration reaction tower usually needs to reach the target temperature of about 230-280 ℃ (medium-low temperature denitration), the filtered flue gas needs to be subjected to heat exchange by the GGH flue gas heat exchanger and heating by the heating furnace so as to reach the target temperature and then enters the denitration reaction tower.
The dust-containing flue gas flows into the denitration reactor in the same direction as the flue gas, namely flows vertically downwards, so that the dust is easy to remove and is taken away by the flue gas without accumulating on the catalyst; if the flue gas flows upwards and the dust is influenced by gravity, the ash can still be suspended in the reactor and is not easily taken away by the flue gas after being cleaned, and finally the ash still adheres to the catalyst to cause the system resistance to rise, so the flue gas must enter from the top of the denitration reactor and flow vertically downwards.
As shown in fig. 1, in the prior art, a bag-type dust collector 01 and a flue 02 are communicated between a desulfurization reaction tower 03 and a denitration reaction tower 04, the front end (the end facing the upstream of the air flow) of the flue 02 is communicated with an air outlet cavity 011 in the bag-type dust collector 01 from the side wall of the bag-type dust collector 01, and then turns downwards and heats the inside flue gas to reach the temperature of the flue gas required by the denitration reaction tower 04, and the arrangement enables the flue 02 to form three horizontal sections 021 and two vertical sections 022 between the bag-type dust collector 01 and the denitration reaction tower 04, and a turn is arranged between each two adjacent horizontal sections 021 and vertical sections 022, so that the occupied space is large. In practical engineering application, a compact plant area is often encountered, the site is extremely limited, and a complete flue gas purification system cannot be arranged without occupied spaces for sequentially arranging and configuring the systems.
Therefore, how to optimize the overall occupied space of the circulating fluidized bed flue gas purification system, so that the possibility of arranging the circulating fluidized bed flue gas purification system in sequence is improved in a limited site space, and the requirement of flue gas emission is met.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a circulating fluidized bed method gas cleaning system and integration connecting device thereof can reduce circulating fluidized bed method gas cleaning system's whole occupation space for in limited space, improve circulating fluidized bed method gas cleaning system and arrange the possibility of arranging in proper order, satisfy the fume emission requirement.
In order to solve the technical problem, the utility model provides an integrated connecting device of a circulating fluidized bed method flue gas purification system, which comprises a bag-type dust remover and a flue; the top end of the bag-type dust remover is provided with an air inlet, the bottom end of the bag-type dust remover is provided with an air outlet, the air inlet is communicated with an air outlet of a desulfurization reaction tower of the circulating fluidized bed method flue gas purification system, and the air outlet is communicated with a denitration reaction tower of the circulating fluidized bed method flue gas purification system through the flue; the front end of the flue is communicated with the air outlet along the vertical direction.
The top is located to the air inlet of sack cleaner, the bottom is located to the gas outlet, and not draw forth from the lateral wall of sack cleaner, so set up for flue gas pipeline and the sack cleaner intercommunication of the vertical setting of gas vent accessible of desulfurization reaction tower, the front end of flue can directly be followed the gas outlet and drawn forth downwards along vertical direction, that is to say, flue gas pipeline or the flue with the sack cleaner intercommunication all set up along vertical direction, need not to set up the corner in the gas outlet department of flue.
The flue is including the first vertical section that feeds through the setting in proper order, first horizontal segment, second vertical section and second horizontal segment, two vertical sections and two horizontal segments promptly, wherein, first vertical section communicates with bag filter's gas outlet, the rear end and the denitration reaction tower intercommunication of second horizontal segment, compare in the scheme that the side was located to the gas outlet of sack cleaner, reducible one locates the horizontal segment between flue and the denitration reaction tower, thereby can shorten the vertical (the direction from the desulfurization reaction tower to the denitration reaction tower) of device and arrange the distance, and then reduce circulating fluidized bed method gas cleaning system's whole occupation space, make in limited place space, improve this circulating fluidized bed method gas cleaning system overall arrangement's possibility.
And, so set up, thereby the quantity of reducible bending segment makes flue gas flow line mild, the flow field is even, is favorable to denitration catalyst in the denitration reaction tower and flue gas fully to contact, and then improves denitration effect.
Optionally, the bag-type dust collector comprises a shell, and an air inlet cavity, a filter cavity and an air outlet cavity which are arranged in the shell and sequentially communicated with each other, wherein the filter cavity comprises a filter unit for filtering flue gas, and the air outlet cavity is located at the upper part of the shell; the bag-type dust collector further comprises an air outlet channel, the top end of the air outlet channel is communicated with an air outlet of the air outlet cavity, and the bottom end of the air outlet channel is communicated with the flue.
Optionally, the front end of the flue is located in the shell of the bag-type dust collector and is communicated with the air outlet of the air outlet cavity to form the air outlet channel.
Optionally, the longitudinal section of the air inlet cavity is of an L-shaped structure, the top end of the L-shaped structure is communicated with an air outlet of the desulfurization reaction tower, and the air outlet cavity is located above the transverse edge of the L-shaped structure.
Optionally, the number of the filter cavities is two, the two filter cavities are symmetrically arranged on two sides of the air inlet cavity and the air outlet cavity, and at least one row of filter units or a partition plate for dividing the filter cavities into at least two rows of filter units is arranged in each filter cavity; the air inlet sides of the filtering units arranged in the same row are communicated in sequence, and the air outlet sides of the filtering units arranged in the same row are communicated in sequence.
Optionally, the denitration reactor further comprises a fan arranged at the downstream of the gas flow of the denitration reactor.
Optionally, an airflow uniform distribution device is further arranged in the flue.
Optionally, the flue gas heating device is used for heating flue gas in the flue.
Additionally, the utility model also provides a circulating fluidized bed method gas cleaning system, it includes desulfurization reaction tower, denitration reaction tower and as above integration connecting device.
The technical effect of the circulating fluidized bed flue gas purification system with the integrated connecting device is similar to that of the integrated connecting device, and is not repeated herein for saving space.
Drawings
FIG. 1 is a schematic diagram of a flue gas purification system of a circulating fluidized bed method in the prior art;
FIG. 2 is a schematic structural diagram of a circulating fluidized bed flue gas purification system provided by an embodiment of the present invention;
FIG. 3 is a top view of the bag-type dust collector of FIG. 2.
In fig. 1, the reference numerals are illustrated as follows:
01-bag dust collector, 011-air outlet cavity; 02-flue, 021-horizontal segment, 022-vertical segment; 03-a desulfurization reaction tower; 04-a denitration reaction tower;
in fig. 2-3, the reference numerals are illustrated as follows:
1-bag-type dust collector, 11-air inlet cavity, 12-air outlet cavity, 13-filter cavity, 14-filter unit, 15-air outlet channel and 16-shell; 2-flue, 21-first vertical section, 22-first horizontal section, 23-second vertical section, 24-second horizontal section; 3-a desulfurization reaction tower; 4-denitration reaction tower.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 2-3, fig. 2 is a schematic structural diagram of a flue gas purification system by a circulating fluidized bed method according to an embodiment of the present invention; FIG. 3 is a top view of the bag-type dust collector of FIG. 2.
The embodiment of the utility model provides a circulation fluidized bed method gas cleaning system and integration connecting device thereof, as shown in fig. 2, this circulation fluidized bed method gas cleaning system includes desulfurization reaction tower 3, denitration reaction tower 4 and above-mentioned integration connecting device, wherein, integration connecting device includes sack cleaner 1 and flue 2, the top of sack cleaner 1 is equipped with the air inlet, the bottom of sack cleaner 1 is equipped with the gas outlet, vertical direction and air inlet intercommunication are followed to the gas vent of desulfurization reaction tower 3, the gas outlet passes through flue 2 and 4 intercommunications of denitration reaction tower. Specifically, the front end of the flue 2 is communicated with the air outlet of the bag-type dust collector 1 along the vertical direction.
Where "front" refers to the side facing upstream of the gas stream and "rear" refers to the side facing downstream of the gas stream.
The top is located to the air inlet of sack cleaner 1, the bottom is located to the gas outlet, and not draw forth from the lateral wall of sack cleaner 1, so set up, make the flue gas pipeline and the 1 intercommunication of sack cleaner of the vertical setting of gas vent accessible of desulfurization reaction tower 3, the front end of flue 2 can directly be followed the gas outlet and drawn forth downwards along vertical direction, that is to say, flue gas pipeline or flue 2 with 1 intercommunication of sack cleaner all set up along vertical direction, need not to set up the corner in the gas outlet department of flue 2.
As shown in fig. 2, the flue 2 includes a first vertical section 21, a first horizontal section 22, a second vertical section 23 and a second horizontal section 24, which are sequentially communicated with each other, that is, two vertical sections and two horizontal sections, wherein the first vertical section 21 is communicated with the gas outlet of the bag filter 1, and the rear end of the second horizontal section 24 is communicated with the denitration reaction tower 4, compared with the scheme that the gas outlet of the bag filter 1 is arranged on the side as shown in fig. 1, one horizontal section arranged between the flue 2 and the denitration reaction tower 4 can be reduced, so that the longitudinal arrangement distance of the device (the direction from the desulfurization reaction tower 3 to the denitration reaction tower 4) can be shortened, the overall occupied space of the circulating fluidized bed flue gas purification system can be reduced, and the possibility of overall arrangement of the circulating fluidized bed flue gas purification system can be improved in a limited site space.
And, so set up, thereby the quantity of reducible bending segment makes flue gas flow line mild, the flow field is even, is favorable to denitration catalyst in the denitration reaction tower 4 to fully contact with the flue gas, and then improves denitration effect.
In the above embodiment, the bag-type dust collector 1 includes a housing 16, and an air inlet cavity 11, a filter cavity 13 and an air outlet cavity 12 which are arranged in the housing 16 and sequentially communicated with each other, wherein the filter cavity 13 includes a filter unit 14 for filtering flue gas, and the air outlet cavity 12 is located at the upper part of the housing 16; that is to say, the bag-type dust collector 1 in this embodiment filters the flue gas through the filter unit 14, and the specific number of the filter unit 14 can be set according to the air displacement and the flue gas emission requirement, so as to be applicable to different circulating fluidized bed flue gas purification systems, and the applicability is good. The outlet chamber 12 is disposed at the upper portion of the housing 16, so that the flue gas filtered by the filter unit 14 can enter the outlet chamber 12 upwards.
Meanwhile, the bag-type dust collector 1 further comprises an air outlet channel 15, the top end of the air outlet channel 15 is communicated with an air outlet of the air outlet cavity 12, and the bottom end of the air outlet channel 15 is communicated with the flue 2. Because the air outlet cavity 12 is arranged at the upper part of the shell 16, the air outlet channel 15 can lead out the flue gas in the air outlet cavity 12 above from the bottom end of the bag-type dust collector 1 and is communicated with the flue 2, so that the flue gas outlet is arranged in the longitudinal direction. Therefore, compared with the prior art, the flue 2 in the embodiment is communicated with the air outlet cavity 12 through the air outlet channel 15 arranged in the bag-type dust collector 1, and the flue 2 in the prior art leads out the flue gas in the air outlet cavity 12 from the side edge of the bag-type dust collector 1 by additionally arranging a bending section and a horizontal section, the scheme provided by the embodiment can obviously reduce the space occupied by the flue 2, meanwhile, because the air outlet channel 15 is positioned in the shell 16 or partially positioned in the shell 16, the flue gas in the air outlet cavity 12 is discharged into the flue 2 along the air outlet channel 15, the heat exchange between the flue gas and the external environment can be reduced, the heat loss is reduced, and the heat preservation effect is good.
Further, the front end of the flue 2 is located in the housing 16 and is communicated with the air outlet of the air outlet cavity 12 to form the air outlet channel 15. That is, the top end of the first vertical section 21 of the flue 2 is embedded in the bag-type dust collector 1 and is communicated with the air outlet cavity 12 to form the air outlet channel 15, that is, the air outlet channel 15 becomes a part of the flue 2 and is embedded in the bag-type dust collector 1 to form an integrated structure design.
In the above embodiment, the longitudinal section of the air inlet cavity 11 is in an L-shaped structure, the top end of the L-shaped structure is communicated with the air outlet of the desulfurization reaction tower 3, and the air outlet cavity 12 is located above the transverse edge of the L-shaped structure. That is, in the present embodiment, the outlet cavity 12 is located above the inlet cavity 11, so that the structure inside the cloth bag filter 1 can be more compact.
Or, in this embodiment, the bag-type dust collector 1 further includes an air inlet channel, the air inlet channel passes through the air outlet cavity 12 and is communicated between the air inlet cavity 11 and the desulfurization reaction tower 3, which are located below, and it is also possible to arrange the flue gas pipelines in the longitudinal direction and introduce the flue gas exhausted from the desulfurization reaction tower 3 into the air inlet cavity 11. And the air inlet cavity 11 is arranged in an L-shaped structure, so that the communication operation between the air inlet cavity 11 and a flue gas pipeline can be simplified.
In the above embodiment, each filtering cavity 13 may be provided with a partition board, the partition board divides the filtering cavity 13 into at least two rows of filtering units 14, that is, the filtering units 14 in each filtering cavity 13 are arranged in at least two rows, the air inlet sides of the filtering units 14 arranged in the same row are sequentially communicated, the air outlet sides of the filtering units 14 arranged in the same row are sequentially communicated, so that the air inlet sides of the filtering units 14 are communicated with the air inlet cavity 11, the air outlet sides of the filtering units 14 are communicated with the air outlet cavity 12, and two adjacent rows of filtering units 14 are isolated from each other.
Of course, in the present embodiment, only one row of filter units 14 may be disposed in each filter cavity 13, and no particular limitation is imposed thereon. And be equipped with two filter chambers 13 in sack cleaner 1, every filter chamber 13 includes two row at least filter unit 14, perhaps can set up a plurality of filter unit 14 to satisfy the circumstances of great flue gas emission volume and higher emission requirement, the suitability is good.
Moreover, the filter units 14 in the two filter cavities 13 are symmetrically arranged about the inlet cavity 11 and the outlet cavity 12, that is, the inlet cavity 11 and the outlet cavity 12 are stacked at the middle position, and the filter cavities 13 are symmetrically arranged at both sides, so that the overall structure of the bag-type dust collector 1 is more regular.
In the above embodiment, the circulating fluidized bed flue gas purification system further includes a fan (not shown in the figure), which is disposed downstream of the denitration reactor 4 and is capable of providing power for flue gas circulation in the circulating fluidized bed flue gas purification system.
In the above-mentioned embodiment, still be equipped with the distribution of air flow device (not shown in the figure) in flue 2, with the perforated plate that evenly sets up a plurality of hole structures, because flue 2 includes two vertical sections and two horizontal segments, the junction between vertical section and the horizontal segment forms the turning, each corner all sets up guide plate etc. the distribution of air flow device can play the effect of stationary flow to the flue gas that gets into in flue 2, so that the flue gas flow line in flue 2 is mild, flow field is even everywhere, can fully contact with the denitration catalyst after letting in the denitration reactor, and then improve the denitration effect.
In the above embodiment, the circulating fluidized bed flue gas purification system further includes a heating device for heating the flue gas in the flue 2, and the heating device may be disposed in the flue 2 or outside the flue 2 to raise the temperature of the flue gas before entering the denitration reaction tower 4, thereby ensuring the temperature requirement of the denitration reaction tower 4 on the flue gas.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. An integrated connecting device of a circulating fluidized bed method flue gas purification system is characterized by comprising a bag-type dust collector (1) and a flue (2);
the top end of the bag-type dust collector (1) is provided with an air inlet, the bottom end of the bag-type dust collector (1) is provided with an air outlet, the air inlet is communicated with an air outlet of a desulfurization reaction tower (3) of the circulating fluidized bed method flue gas purification system, and the air outlet is communicated with a denitration reaction tower (4) of the circulating fluidized bed method flue gas purification system through the flue (2);
the front end of the flue (2) is communicated with the air outlet along the vertical direction.
2. The integrated connecting device according to claim 1, wherein the bag-type dust collector (1) comprises a shell (16), and an air inlet cavity (11), a filter cavity (13) and an air outlet cavity (12) which are arranged in the shell (16) and sequentially communicated with each other, wherein the filter cavity (13) comprises a filter unit (14) for filtering flue gas, and the air outlet cavity (12) is arranged at the upper part of the shell (16);
the bag-type dust collector (1) further comprises an air outlet channel (15), the top end of the air outlet channel (15) is communicated with an air outlet of the air outlet cavity (12), and the bottom end of the air outlet channel is communicated with the flue (2).
3. The integrated connecting device according to claim 2, wherein the front end of the flue (2) is positioned in the housing (16) of the bag-type dust collector (1) and is communicated with the air outlet of the air outlet cavity (12) to form the air outlet channel (15).
4. The integrated connecting device according to claim 2 or 3, wherein the longitudinal section of the air inlet cavity (11) is in an L-shaped structure, the top end of the L-shaped structure is communicated with an air outlet of the desulfurization reaction tower (3), and the air outlet cavity (12) is positioned above the transverse edge of the L-shaped structure.
5. The integrated connecting device according to claim 2 or 3, wherein the number of the filter cavities (13) is two, the two filter cavities (13) are symmetrically arranged on two sides of the air inlet cavity (11) and the air outlet cavity (12), and each filter cavity (13) at least contains one row of filter units (14) or is respectively provided with a clapboard which divides the filter cavity (13) into at least two rows of filter units (14); the air inlet sides of the filtering units (14) arranged in the same row are communicated in sequence, and the air outlet sides of the filtering units (14) arranged in the same row are communicated in sequence.
6. The integrated connection device according to any one of claims 1 to 3, further comprising a fan disposed downstream of the denitration reactor (4).
7. The integrated connecting device according to any one of claims 1 to 3, wherein an airflow uniform distribution device is further arranged in the flue (2).
8. The integrated connection according to any of claims 1 to 3, further comprising heating means for heating the fumes inside the flue (2).
9. A flue gas purification system by a circulating fluidized bed method, comprising a desulfurization reaction tower (3), a denitrification reaction tower (4) and an integrated connection device according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921564468.8U CN210874484U (en) | 2019-09-19 | 2019-09-19 | Circulating fluidized bed method flue gas purification system and integrated connecting device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921564468.8U CN210874484U (en) | 2019-09-19 | 2019-09-19 | Circulating fluidized bed method flue gas purification system and integrated connecting device thereof |
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| CN210874484U true CN210874484U (en) | 2020-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110478995A (en) * | 2019-09-19 | 2019-11-22 | 福建龙净脱硫脱硝工程有限公司 | A kind of ciculation fluidized bed process flue gas purification system and its integrated connecting device |
-
2019
- 2019-09-19 CN CN201921564468.8U patent/CN210874484U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110478995A (en) * | 2019-09-19 | 2019-11-22 | 福建龙净脱硫脱硝工程有限公司 | A kind of ciculation fluidized bed process flue gas purification system and its integrated connecting device |
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