CN212700972U - Flue gas desulfurization system of float glass melting furnace - Google Patents
Flue gas desulfurization system of float glass melting furnace Download PDFInfo
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- CN212700972U CN212700972U CN202021191744.3U CN202021191744U CN212700972U CN 212700972 U CN212700972 U CN 212700972U CN 202021191744 U CN202021191744 U CN 202021191744U CN 212700972 U CN212700972 U CN 212700972U
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Abstract
The utility model discloses a flue gas desulfurization system of a float glass melting furnace, which relates to the technical field of flue gas desulfurization of the float glass melting furnace, and comprises two groups of flue gas treatment systems, wherein each group of flue gas treatment system comprises a waste heat boiler, a boiler induced draft fan, a NID desulfurization reactor, a bag-type dust remover and a desulfurization induced draft fan which are sequentially communicated through a flue; the two groups of flue gas treatment systems are connected through a middle flue, two ends of the middle flue are respectively connected with flues in front of the NID desulfurization reactors of the two groups of flue gas treatment systems, and a connecting flashboard is arranged on the middle flue. The utility model discloses a switch desulfurization and sack dust pelletizing system in service to reserve desulfurization and sack dust pelletizing system, just can guarantee exhaust-heat boiler and deNOx systems normal operating, simplified operating procedure by a wide margin, shortened the direct row time of switching in-process flue gas.
Description
Technical Field
The utility model relates to a float glass melting furnace flue gas desulfurization technical field especially relates to a float glass melting furnace flue gas desulfurization system.
Background
The prior art for treating the flue gas of the float glass melting furnace comprises the following steps: 480 ℃ high-temperature flue gas from a float glass melting furnace enters a waste heat boiler through a flue, is cooled through a high-temperature superheater, a low-temperature superheater, a first-stage evaporator and a second-stage evaporator, meets the temperature requirement of 320-380 ℃ for flue gas SCR denitration, enters a denitration reactor after being dedusted by a high-temperature electrostatic precipitator, returns to three-stage, four-stage, five-stage, six-stage and two-stage coal economizers of the waste heat boiler to finish heat exchange temperature reduction, becomes low-temperature flue gas of about 200 ℃, is desulfurized through an NID (non-volatile organic compound) desulfurization reactor and dedusted by a bag-type dust remover, and is discharged into a chimney through a desulfurization draught fan. The general process is as follows: the method comprises the following steps of waste heat boiler high-temperature section-high-temperature electrostatic dust collector-SCR denitration reactor-waste heat boiler low-temperature section-NID desulfurization-bag dust collector-chimney.
Wherein the desulfurization process of the NID desulfurization reactor is as follows: the flue gas of the float glass melting furnace is led out from an outlet of a draught fan of the waste heat boiler, enters the reactor through the bottom of the reactor, and reacts with the absorbent uniformly mixed in the humidifying circulating ash. Under the conditions of temperature reduction and humidification, SO in the flue gas2Reacts with the absorbent to generate calcium sulfite and calcium sulfate. The flue gas after reaction carries a large amount of dry solid particles to enter a bag-type dust collector, dry circulating ash is separated from the flue gas by the bag-type dust collector and is conveyed to a mixer by conveying equipment, meanwhile, slaked lime is added into the mixer, and the circulating is performed again through humidification, mixing and stirring, wherein the circulating multiplying power reaches 150. The cleaned flue gas is discharged into a chimney through a draught fan without reheating at the dew point temperature of more than 15 ℃.
Desulfurization and bag dust pelletizing system is in whole environmental protection facility, compare exhaust-heat boiler and flue gas denitration system, the probability that breaks down is higher, if in case appear similar to the event of a large amount of damage of dust removal sack, the single equipment trouble of core such as circulating frequency conversion batcher or blender, can't resume operation in the short time again, need to switch exhaust-heat boiler and desulfurization denitration dust pelletizing system in service to reserve exhaust-heat boiler and desulfurization denitration dust pelletizing system this moment, the process of switching operation is complicated, and the cycle of switching is longer, generally need control more than 32 h.
Therefore, it is desirable to provide a flue gas desulfurization system for a float glass melting furnace to solve the above problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a float glass melting furnace flue gas desulfurization system to solve the problem that above-mentioned prior art exists, through switching desulfurization and sack dust pelletizing system in service to reserve desulfurization and sack dust pelletizing system, just can guarantee exhaust-heat boiler and deNOx systems normal operating, simplified operating procedure by a wide margin, shortened the direct row time of switching in-process flue gas.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a flue gas desulfurization system of a float glass melting furnace, which comprises two groups of flue gas treatment systems, wherein each group of flue gas treatment system comprises a waste heat boiler, a boiler induced draft fan, a NID desulfurization reactor, a bag-type dust collector and a desulfurization induced draft fan which are sequentially communicated through a flue; the two groups of flue gas treatment systems are connected through a middle flue, two ends of the middle flue are respectively connected with flues in front of the NID desulfurization reactors of the two groups of flue gas treatment systems, and a connecting flashboard is arranged on the middle flue.
Preferably, the air inlet of the waste heat boiler is used for introducing the smoke of the melting furnace, the air outlet of the waste heat boiler is connected with the boiler induced draft fan, and the desulfurization induced draft fan is further connected with a chimney.
Preferably, the front side and the rear side of the boiler induced draft fan are respectively provided with a boiler induced draft fan inlet gate and a boiler induced draft fan outlet gate.
Preferably, a NID desulfurization inlet flashboard is arranged in front of the NID desulfurization reactor.
Preferably, the rear of the desulfurization draught fan is provided with a desulfurization draught fan outlet flashboard.
Preferably, two ends of the middle flue are respectively connected between the boiler induced draft fan outlet flashboards and the NID desulfurization inlet flashboards of the two groups of flue gas treatment systems.
The utility model discloses for prior art gain following technological effect:
the utility model discloses only switch desulfurization and sack dust pelletizing system in service to reserve desulfurization and sack dust pelletizing system, just can guarantee exhaust-heat boiler and deNOx systems normal operating, simplified operating procedure by a wide margin, shortened the direct row time of switching in-process flue gas (generally about 3 hours just can switch the completion) above all.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a single stack flue gas treatment system;
FIG. 2 is a schematic view of the overall structure of the flue gas desulfurization system of the float glass melting furnace of the present invention;
in the figure, 1 is a waste heat boiler, 2 is a boiler induced draft fan, 3 is a boiler induced draft fan outlet flashboard, 4 is a boiler induced draft fan inlet flashboard, 5 is a NID desulfurization inlet flashboard, 6 is a NID desulfurization reactor, 7 is a bag-type dust collector, 8 is a desulfurization induced draft fan, 9 is a desulfurization induced draft fan outlet flashboard, 10 is a chimney, 11 is a middle flue, and 12 is a connecting flashboard.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Example one
As shown in fig. 1-2, the embodiment provides a float glass melting furnace flue gas desulfurization system, which mainly comprises a float glass melting furnace flue gas desulfurization system, and comprises two groups of flue gas treatment systems, wherein each group of flue gas treatment system comprises a waste heat boiler 1, a boiler induced draft fan 2, an NID desulfurization reactor 6, a bag-type dust collector 7 and a desulfurization induced draft fan 8 which are sequentially communicated through a flue; the two groups of flue gas treatment systems are connected through a middle flue, two ends of the middle flue are respectively connected with flues in front of the NID desulfurization reactor 6 of the two groups of flue gas treatment systems, and a connecting flashboard 12 is arranged on the middle flue.
Preferably, the air inlet of the waste heat boiler 1 is used for introducing the melting furnace flue gas, the air outlet is connected with the boiler induced draft fan 2, and the desulfurization induced draft fan 8 is further connected with a chimney 10.
Preferably, the front side and the rear side of the boiler induced draft fan 2 are respectively provided with a boiler induced draft fan inlet gate 4 and a boiler induced draft fan outlet gate 3; a NID desulfurization inlet flashboard 5 is arranged in front of the NID desulfurization reactor 6; and a desulfurization draught fan outlet flashboard 9 is arranged at the rear part of the desulfurization draught fan 8.
Preferably, two ends of the middle flue are respectively connected between the boiler induced draft fan outlet flashboards 3 and the NID desulfurization inlet flashboards 5 of the two groups of flue gas treatment systems.
As shown in fig. 2, the system comprises an upper flue gas treatment system and a lower flue gas treatment system which are independent and respectively comprise a waste heat boiler 1, a boiler induced draft fan 2, an NID desulfurization reactor 6, a bag-type dust collector 7 and a desulfurization induced draft fan 8, wherein the two independent flue gas treatment systems are connected through a middle flue 11 which is additionally provided with a connecting flashboard 12 between the upper flue gas treatment system and the lower flue gas treatment system; the waste heat boiler 1 and the boiler induced draft fan 2 belong to independent waste heat boiler systems, and the two independent desulfurization and bag-type dust removal systems are mutually standby in the embodiment from the NID desulfurization inlet flashboard 5 to the NID desulfurization reactor 6, the bag-type dust remover 7 and the desulfurization induced draft fan 8.
When the boiler normally operates, the upper waste heat boiler system and the desulfurization and bag-type dust removal system normally operate, and the connecting flashboard 12 is in a closed state; once the desulfurization and bag-type dust removal system fails to recover in a short time, when the system needs to be switched to a standby NID desulfurization bag-type dust removal system, the connecting flashboard 12 is opened, the lower NID desulfurization inlet flashboard 5 is opened, the lower standby boiler induced draft fan outlet flashboard 3 is closed, the lower desulfurization induced draft fan 8 is gradually started, the upper desulfurization induced draft fan 8 to be stopped is turned down, the upper flue gas is gradually led to the lower NID desulfurization and bag-type dust removal system through the middle flue 11, and the flue gas is discharged through the chimney 10 after the desulfurization and the dust removal are completed.
An intermediate flue is additionally arranged between an outlet flashboard 3 of a boiler induced draft fan and an inlet flashboard of a flue gas treatment system of two sets of independent waste heat boilers and desulfurization cloth bag dust removal systems, and a connecting flashboard 12 is arranged on the upper section of the flue. When the connection flashboard 12 is in a closed state in normal operation, once the connection flashboard 12 and the inlet flashboard of the standby desulfurization system are opened when the connection flashboard 12 and the inlet flashboard of the standby NID desulfurization cloth bag dust removal system need to be switched to the standby NID desulfurization cloth bag dust removal system, the outlet flashboard 3 of the standby boiler induced draft fan is closed, the standby desulfurization induced draft fan 8 is opened one by one, the desulfurization induced draft fan 8 to be stopped is closed, the flue gas is gradually led to the standby desulfurization system, then the standby desulfurization dust removal system is started according to normal.
As shown in fig. 1, in this embodiment, the exhaust-heat boiler 1, the boiler induced-draft fan inlet gate 4, and the boiler induced-draft fan outlet gate 3 are a set of independent exhaust-heat boiler 1 system, and belong to a set of independent desulfurization and bag-type dust removal systems from the NID desulfurization inlet gate 5 to the NID desulfurization reactor 6, the bag-type dust remover 7, the desulfurization induced-draft fan 8, and the desulfurization induced-draft fan outlet gate 9. Even under the condition that there is not the spare system of desulfurization and bag dust removal, if the system of desulfurization and bag dust removal breaks down, can't recover in the short time, exhaust-heat boiler 1 system can the independent operation, and the flue gas accessible bypass flue is directly discharged, and the bypass flue just is in between boiler draught fan export flashboard 3 and NID desulfurization import flashboard 5, and bypass flue direct connection chimney 10.
If the connecting flashboard 12 is added between the flues behind the NID desulfurization inlet flashboards 5 of the two independent systems, an inlet flashboard is required to be additionally arranged before the two NID systems so as to prevent smoke from entering the other system, thus increasing the construction difficulty and cost;
the connecting shutter 12, if added in front of the boiler induced draft fan outlet shutter 3: firstly, destroyed the independence of exhaust-heat boiler 1 system operation, secondly, every exhaust-heat boiler 1 all has two sets of boiler draught fans 2, one uses one and is equipped with, when switching to reserve draught fan operation, the change of wind pressure has very big influence to desulfurization system, then every boiler draught fan 2 and the distance of the exit flashboard that corresponds, boiler outlet wind gap installation are all nearer again because the construction degree of difficulty that other flue flashboards increase is increased again to the scene.
In this embodiment, the connecting flashboard 12 is installed between the two sets of system boiler induced draft fan outlet flashboards 3 and the NID desulfurization inlet flashboard 5, and is the best position in terms of construction difficulty, construction cost and guarantee of system stability.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. A flue gas desulfurization system of a float glass melting furnace is characterized in that: the system comprises two groups of flue gas treatment systems, wherein each group of flue gas treatment system comprises a waste heat boiler, a boiler induced draft fan, a NID desulfurization reactor, a bag-type dust collector and a desulfurization induced draft fan which are sequentially communicated through a flue; the two groups of flue gas treatment systems are connected through a middle flue, two ends of the middle flue are respectively connected with flues in front of the NID desulfurization reactors of the two groups of flue gas treatment systems, and a connecting flashboard is arranged on the middle flue.
2. The float glass melter flue gas desulfurization system of claim 1, wherein: the air inlet of the waste heat boiler is used for introducing melting furnace flue gas, the air outlet of the waste heat boiler is connected with the boiler induced draft fan, and the desulfurization induced draft fan is further connected with a chimney.
3. The float glass melter flue gas desulfurization system of claim 1, wherein: boiler draught fan import flashboard and boiler draught fan export flashboard are provided with respectively to both sides around the boiler draught fan.
4. The float glass melter flue gas desulfurization system of claim 3, wherein: and a NID desulfurization inlet flashboard is arranged in front of the NID desulfurization reactor.
5. The float glass melter flue gas desulfurization system of claim 4, wherein: and a desulfurization draught fan outlet flashboard is arranged at the rear of the desulfurization draught fan.
6. The float glass melter flue gas desulfurization system of claim 4, wherein: and the two ends of the middle flue are respectively connected between the boiler induced draft fan outlet flashboards and the NID desulfurization inlet flashboards of the two groups of flue gas treatment systems.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021191744.3U CN212700972U (en) | 2020-06-23 | 2020-06-23 | Flue gas desulfurization system of float glass melting furnace |
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| CN202021191744.3U CN212700972U (en) | 2020-06-23 | 2020-06-23 | Flue gas desulfurization system of float glass melting furnace |
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| CN212700972U true CN212700972U (en) | 2021-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377526A (en) * | 2022-01-25 | 2022-04-22 | 福建三钢闽光股份有限公司 | Control method of header system coke oven flue gas recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377526A (en) * | 2022-01-25 | 2022-04-22 | 福建三钢闽光股份有限公司 | Control method of header system coke oven flue gas recovery system |
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