CN218530144U - Dry desulfurization and low-temperature denitration system for dedusting of glass fiber filter bag of industrial silicon furnace flue gas - Google Patents
Dry desulfurization and low-temperature denitration system for dedusting of glass fiber filter bag of industrial silicon furnace flue gas Download PDFInfo
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- CN218530144U CN218530144U CN202221804360.3U CN202221804360U CN218530144U CN 218530144 U CN218530144 U CN 218530144U CN 202221804360 U CN202221804360 U CN 202221804360U CN 218530144 U CN218530144 U CN 218530144U
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Abstract
The utility model provides a fine filter bag dust removal dry process desulfurization low temperature deNOx systems of industry silicon stove flue gas relates to silicon stove gas cleaning technical field, including first dust collector, second dust collector, desulphurization unit and denitrification facility, first dust collector's export and desulphurization unit's entry linkage, desulphurization unit's export and second dust collector's entry linkage, second dust collector's export and denitrification facility's entry linkage, first dust collector is used for collecting little silica flour, and second dust collector is used for collecting the desulfurization accessory substance, the utility model discloses a first dust collecting equipment carries out the primary dust removal to the silicon stove flue gas and handles and collect little silica flour, and the silicon stove flue gas that handles through the primary dust removal enters into second dust collector and carries out the secondary dust removal and handle and collect the desulfurization accessory substance afterwards, and the silicon stove flue gas that handles through the secondary dust removal gets into denitrification facility and carries out the denitration treatment, the utility model discloses simple structure, the practicality is stronger.
Description
Technical Field
The utility model relates to a silicon stove gas cleaning technical field particularly, relates to a fine filter bag dust removal dry process desulfurization low temperature deNOx systems of industrial silicon stove flue gas.
Background
The flue gas purification of the industrial silicon furnace is changed by the environmental protection policy, only dust removal is needed originally, desulfurization and denitrification are needed at present, a novel treatment process needs to be developed, the flue gas dust of the industrial silicon furnace is special, the content is large, the specific gravity is light, dust collection is difficult, the dust is silica fume, the dust has a useful value, the space is saved by encryption after the dust is collected, the package can be packaged and sold, the previous dust collection device is used for positive-pressure large cloth bag dust removal, and the current environmental protection requirement is met by negative-pressure dust removal for subsequent desulfurization and denitrification.
Flue gas generated by an industrial silicon furnace is generally cooled to about 160 ℃ by recovering heat energy through a waste heat boiler, dust removal, desulfurization and denitration equipment needs different process designs under the condition of the flue gas to solve relative contradictions, in the prior art, an SCR denitration catalyst is difficult to denitrate at low temperature, ABS (ammonium bisulfate) is generated and deposited on the surfaces of the catalyst and the like, so that the catalyst is blocked and inactivated, dry desulfurization is better for the reasons of water shortage and low sulfur content in northern areas, equipment investment and the like, and the effect of large-scale application of sodium bicarbonate desulfurization in the coking industry is better.
In view of this, the present application is specifically proposed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fine filter bag dust removal dry process desulfurization low temperature denitration system of industry silicon furnace flue gas, it carries out the one-level dust removal through first dust collecting equipment to the silicon furnace flue gas and handles and collect silica fume, and the silicon furnace flue gas that handles through the one-level dust removal enters into desulphurization unit and carries out desulfurization treatment, and the silicon furnace flue gas that handles through the second grade dust removal gets into second grade dust removal processing afterwards and collects the desulfurization accessory substance, and the silicon furnace flue gas that handles through the second grade dust removal gets into denitrification facility and carries out denitration treatment, the utility model discloses simple structure, the practicality is stronger.
The embodiment of the utility model is realized like this: the utility model provides a fine filter bag dust removal dry process desulfurization low temperature deNOx systems of industry silicon stove flue gas, includes first dust collector, second dust collector, desulphurization unit and denitrification facility, first dust collector's export and desulphurization unit's entry linkage, desulphurization unit's export and second dust collector's entry linkage, second dust collector's export and denitrification facility's entry linkage, first dust collector is used for collecting silica fume, second dust collector is used for collecting the desulfurization accessory substance.
The utility model discloses an in some embodiments, still include exhaust-heat boiler, draught fan and chimney, exhaust-heat boiler's export and first dust collector's entry linkage, the entry and the exit linkage of denitrification facility of draught fan, the export of draught fan and the entry linkage of chimney.
In some embodiments of the utility model, the first dust collector is the fine big sack cleaner of negative pressure glass, and the second dust collector is the pulse sack cleaner.
The utility model discloses an in some embodiments, desulphurization unit is SDS desulphurization unit, and denitrification facility is SCR low temperature denitrification facility.
In some embodiments of the present invention, the exhaust-heat boiler outlet temperature is 180 ℃ to 220 ℃.
In some embodiments of the present invention, the operating temperature of the SDS desulfurizer is 160 ℃ to 180 ℃.
In some embodiments of the present invention, the desulfurizing agent used in the SDS desulfurization device includes at least sodium bicarbonate or high activity calcium hydroxide.
The utility model discloses an in some embodiments, the low temperature catalyst that uses among the SCR low temperature denitrification facility and the temperature phase-match after the desulfurization is accomplished to the silicon stove flue gas through SDS desulphurization unit.
The utility model discloses an in some embodiments, first dust collector is equipped with knocking device, and knocking device is used for strikeing first dust collector outer wall, prevents that the inside dust of first dust collector from piling up.
The utility model discloses an in some embodiments, knocking device includes base, movable rod, pivot and driving motor, and the movable rod setting is on the base, and the pivot is connected with movable rod and driving motor.
Compared with the prior art, the embodiment of the utility model provides a have following advantage or beneficial effect at least:
the embodiment of the utility model provides a pair of fine filter bag dust removal dry desulfurization low temperature denitration system of industrial silicon stove flue gas, get into the fine big sack cleaner of negative pressure glass after the silicon stove flue gas carries out flue gas waste heat recovery through exhaust-heat boiler and carry out the primary dust removal and handle, collect little silica flour after handling the completion, so that the reutilization, the silicon stove flue gas after the primary dust removal is handled gets into SDS desulphurization unit and carries out desulfurization treatment, behind the desulfurization treatment through desulfurizer sodium bicarbonate, the silicon stove flue gas gets into pulse sack dust collector and carries out secondary dust removal treatment, collect the desulfurization accessory substance, avoid influencing the use of little silica flour, the silicon stove flue gas after secondary dust removal treatment gets into SCR low temperature denitration device and carries out denitration treatment, corresponding low temperature catalyst is selected according to the actual temperature of silicon stove flue gas this moment, the silicon stove flue gas after SCR low temperature denitration treatment is purified to clean flue gas, clean flue gas is discharged through the chimney, accomplish the dust removal and the SOx/NOx control of silicon stove flue gas, the utility model has the advantages of simple structure, the running cost is low, can the efficient carry out dust removal and SOx/NOx control to the silicon stove flue gas, and SOx/NOx control treatment, and draught fan are effectual, denitration, and SOx/NOx control are stronger in practicality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram provided in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a negative pressure glass fiber big bag-type dust collector provided by an embodiment of the present invention;
fig. 3 is a partial enlarged view of a in fig. 2 according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a knocking device according to an embodiment of the present invention;
fig. 5 is a diagram of the connection relationship between the devices provided by the embodiment of the present invention.
The labels in the figure are: 101-a waste heat boiler, 102-a negative pressure glass fiber big bag dust collector, 102 a-a knocking device, 102 b-a base, 102 c-a limiting block, 102 d-a rotating shaft, 102 e-a driving motor, 102 f-a movable rod, 103-SDS (sodium dodecyl sulfate) desulfurization device, 104-a pulse bag dust collector, 105-an SCR (selective catalytic reduction) low-temperature denitration device, 106-an induced draft fan and 107-a chimney.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1, the embodiment provides a dry desulfurization and low-temperature denitration system for glass fiber filter bag dust removal of flue gas of an industrial silicon furnace, which comprises a first dust removal device, a second dust removal device, a desulfurization device and a denitration device, wherein an outlet of the first dust removal device is connected with an inlet of the desulfurization device, an outlet of the desulfurization device is connected with an inlet of the second dust removal device, an outlet of the second dust removal device is connected with an inlet of the denitration device, the first dust removal device is used for collecting silica fume, and the second dust removal device is used for collecting desulfurization byproducts.
The utility model discloses a first dust collecting equipment carries out the one-level dust removal to the silicon stove flue gas and handles and collect little silica flour, and the silicon stove flue gas that handles through the one-level dust removal enters into desulphurization unit and carries out desulfurization treatment, and the silicon stove flue gas that handles through the second grade dust removal later gets into second grade dust removal processing and collects the desulfurization accessory substance, and the silicon stove flue gas that handles through the second grade dust removal gets into denitrification facility and carries out denitration treatment, the utility model discloses simple structure, the practicality is stronger.
The utility model discloses an in the embodiment, still include exhaust-heat boiler 101, draught fan 106 and chimney 107, exhaust-heat boiler 101's export and first dust collector's entry linkage, the entry of draught fan 106 and denitrification facility's exit linkage, the export of draught fan 106 and the entry linkage of chimney 107.
In the embodiment of the utility model, the first dust removing device is a negative pressure glass fiber big bag dust remover 102, and the second dust removing device is a pulse bag dust remover 104.
It should be noted that each chamber of the negative pressure glass fiber big bag-type dust collector 102 is sealed and separated, and as a device for collecting micro-silicon powder alone, the micro-silicon powder collected by the negative pressure glass fiber big bag-type dust collector 102 is not polluted by desulfurization byproducts, and the application range is wider.
Another need to be mentioned is that, the SCR low-temperature denitration is performed after the dust removal treatment is performed by the negative-pressure glass fiber big bag dust collector 102, so that the influence of the industrial silicon dust on the low-temperature catalyst, which affects the catalytic efficiency, delays the service life of the catalyst, and reduces the industrial cost can be avoided.
It should also be noted that the pulse bag dust collector 104 is used to separately collect the desulfurization byproducts, so as to avoid the desulfurization byproducts from affecting the use of the silica fume.
The embodiment of the utility model provides an in, desulphurization unit is SDS desulphurization unit 103, and denitrification facility is SCR low temperature denitrification facility 105.
The SDS desulfurizer 103 is an SDS sodium-based dry desulfurizer.
In the embodiment of the utility model, the outlet temperature of the exhaust-heat boiler 101 is 180 ℃ to 220 ℃.
In detail, in order to meet the temperature requirement of the denitration catalyst, the outlet temperature of the waste heat boiler 101 in the present embodiment is set to 200 ℃.
It should be noted that, in actual use, the temperature at the outlet of the exhaust heat boiler 101 may be set according to different types of denitration catalysts, so as to achieve the best denitration effect.
In the embodiment of the present invention, the operating temperature of the SDS desulfurizer 103 is 160 to 180 ℃.
It should be noted that the operating temperature of the SDS desulfurization device 103 is set to 170 ℃ in this embodiment, which is to ensure that the temperature of the flue gas of the silicon furnace is maintained above 160 ℃ after the flue gas is desulfurized by the SDS desulfurization device 103.
In the embodiment of the present invention, the desulfurizing agent used in the SDS desulfurization device 103 includes at least sodium bicarbonate or high-activity calcium hydroxide.
It should be noted that, in this embodiment, the desulfurizing agent used in the SDS desulfurization device 103 is sodium bicarbonate, which aims to ensure that the temperature of the desulfurization section is 170 ℃, the sodium bicarbonate reacts quickly, and the operation is simple, and only needs to be sprayed into the flue gas pipeline.
The other needs to be noted is that sodium bicarbonate is used as a desulfurizing agent, which produces few desulfurization byproducts, has high desulfurization efficiency, has high removal rate for other acidic substances and has low operation cost.
It is also stated that when high activity calcium hydroxide is used instead of sodium bicarbonate, the surface area of the high activity calcium hydroxide needs to reach at least 40m 2 More than g.
The embodiment of the utility model provides an in, the low temperature catalyst that uses in the SCR low temperature denitrification facility 105 accomplishes the temperature phase-match after the desulfurization with the silicon stove flue gas through SDS desulphurization unit 103.
It should be noted that, after the flue gas of the silicon furnace is subjected to desulfurization treatment by the SDS desulfurization device 103, the temperature is kept between 160 ℃ and 180 ℃, and during actual use, a corresponding low-temperature catalyst needs to be selected according to the specific temperature thereof, so as to ensure that the optimal denitration effect is achieved.
The utility model discloses an in the embodiment, first dust collector is equipped with knocking device 102a, and knocking device 102a is used for knocking first dust collector outer wall, prevents that the inside dust of first dust collector from piling up.
The utility model discloses an in the embodiment, knocking device 102a includes base 102ab, movable rod 102f, pivot and driving motor, and the movable rod setting is on the base, and the pivot is connected with movable rod and driving motor.
To sum up, the utility model provides a glass fiber filter bag dust removal dry desulfurization low-temperature denitration system for industrial silicon furnace flue gas, when the silicon furnace flue gas passes through waste heat boiler 101 for flue gas waste heat recovery, the flue gas enters negative pressure glass fiber big bag dust collector 102 for primary dust removal treatment, after the treatment is completed, the micro silicon powder is collected for secondary utilization, the silicon furnace flue gas after the primary dust removal treatment enters SDS desulfurizer 103 for desulfurization treatment, after the desulfurization treatment by desulfurizer sodium bicarbonate, the silicon furnace flue gas enters pulse bag dust collector 104 for secondary dust removal treatment, the desulfurization by-product is collected, the use of the micro silicon powder is avoided being influenced, the silicon furnace flue gas after the secondary dust removal treatment enters SCR low-temperature denitration device 105 for denitration treatment, corresponding low temperature catalyst is selected according to the actual temperature of silicon furnace flue gas this moment, silicon furnace flue gas after handling through SCR low temperature denitration 105 is purified to clean flue gas, clean flue gas is discharged through chimney 107 by draught fan 106, accomplish the dust removal and the SOx/NOx control of silicon furnace flue gas, when little silica flour needs to be collected, start knocking device 102a, knocking device 102a strikes the outer wall of the fine big sack cleaner 102 of negative pressure glass, avoid little silica flour to adhere to the inner wall of the fine big sack cleaner 102 of negative pressure glass, improve the collection efficiency of little silica flour, when need not collect little silica flour, close knocking device 102a can, the utility model has the advantages of simple structure, the running cost is low, can the efficient remove dust and SOx/NOx control the silicon furnace flue gas to dust removal and SOx/NOx control are handled, and the practicality is stronger.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The industrial silicon furnace flue gas glass fiber filter bag dedusting dry desulfurization low-temperature denitration system is characterized by comprising a first dust removal device, a second dust removal device, a desulfurization device and a denitration device, wherein an outlet of the first dust removal device is connected with an inlet of the desulfurization device, an outlet of the desulfurization device is connected with an inlet of the second dust removal device, an outlet of the second dust removal device is connected with an inlet of the denitration device, the first dust removal device is used for collecting micro silicon powder, and the second dust removal device is used for collecting desulfurization byproducts.
2. The glass fiber filter bag dedusting dry desulfurization and low-temperature denitration system for industrial silicon furnace flue gas according to claim 1, characterized by further comprising a waste heat boiler (101), an induced draft fan (106) and a chimney (107), wherein an outlet of the waste heat boiler (101) is connected with an inlet of the first dedusting device, an inlet of the induced draft fan (106) is connected with an outlet of the denitration device, and an outlet of the induced draft fan (106) is connected with an inlet of the chimney (107).
3. The system for the dry desulfurization and low-temperature denitration of the flue gas glass fiber filter bag dust of the industrial silicon furnace as claimed in claim 1, wherein the first dust removal device is a negative pressure glass fiber big bag dust remover (102), and the second dust removal device is a pulse bag dust remover (104).
4. The system of claim 1, wherein the desulfurization device is an SDS desulfurization device (103), and the denitration device is an SCR low-temperature denitration device (105).
5. The industrial silicon furnace flue gas glass fiber filter bag dedusting dry desulfurization and low temperature denitration system according to claim 2, characterized in that the outlet temperature of the exhaust-heat boiler (101) is 180 ℃ to 220 ℃.
6. The system for the dry desulfurization and denitration of the industrial silicon furnace flue gas glass fiber filter bag according to claim 4, wherein the SDS desulfurization device (103) has a working temperature of 160-180 ℃.
7. The system for the glass fiber filter bag dedusting, dry desulfurization and low-temperature denitration of industrial silicon furnace flue gas according to claim 4, characterized in that the desulfurizing agent used in the SDS desulfurization device (103) at least comprises sodium bicarbonate or high-activity calcium hydroxide.
8. The system for the glass fiber filter bag dedusting dry desulfurization and low-temperature denitration of the industrial silicon furnace flue gas as claimed in claim 4, wherein the low-temperature catalyst used in the SCR low-temperature denitration device (105) is matched with the temperature of the silicon furnace flue gas after the desulfurization of the silicon furnace flue gas through the SDS desulfurization device (103).
9. The system for the dry desulfurization and low-temperature denitration of the flue gas glass fiber filter bag dust removal of the industrial silicon furnace as claimed in claim 1, wherein the first dust removal device is provided with a knocking device (102 a), and the knocking device (102 a) is used for knocking the outer wall of the first dust removal device to prevent dust accumulation in the first dust removal device.
10. The system for dedusting, dry desulfurizing and low-temperature denitrating of industrial silicon furnace flue gas glass fiber filter bag according to claim 9, wherein the knocking device (102 a) comprises a base (102 b), a movable rod (102 f), a limit block (102 c), a rotating shaft (102 d) and a driving motor (102 e), the movable rod (102 f) is arranged on the base (102 b), the limit block (102 c) is arranged on the movable rod (102 f), one end of the rotating shaft (102 d) is movably connected with the limit block (102 c), and the other end of the rotating shaft is connected with the driving motor (102 e).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221804360.3U CN218530144U (en) | 2022-07-13 | 2022-07-13 | Dry desulfurization and low-temperature denitration system for dedusting of glass fiber filter bag of industrial silicon furnace flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221804360.3U CN218530144U (en) | 2022-07-13 | 2022-07-13 | Dry desulfurization and low-temperature denitration system for dedusting of glass fiber filter bag of industrial silicon furnace flue gas |
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| CN218530144U true CN218530144U (en) | 2023-02-28 |
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| CN202221804360.3U Active CN218530144U (en) | 2022-07-13 | 2022-07-13 | Dry desulfurization and low-temperature denitration system for dedusting of glass fiber filter bag of industrial silicon furnace flue gas |
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| CN (1) | CN218530144U (en) |
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