CN214598257U - Dry-method waste gas desulfurization device - Google Patents
Dry-method waste gas desulfurization device Download PDFInfo
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- CN214598257U CN214598257U CN202120500643.8U CN202120500643U CN214598257U CN 214598257 U CN214598257 U CN 214598257U CN 202120500643 U CN202120500643 U CN 202120500643U CN 214598257 U CN214598257 U CN 214598257U
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Abstract
The utility model provides a waste gas desulphurization unit of dry process, including storage bin, batcher, grinding machine and conveying fan, desulfurization reaction flue, dust remover, draught fan and chimney, the feed inlet and the storage bin of batcher are connected, and the discharge gate is connected with the grinding machine, the discharge gate of grinding machine inserts desulfurization reaction flue, the exhaust end of kiln is connected through desulfurization reaction flue in the import of dust remover, and the export links to each other with the draught fan, the chimney is connected through the main entrance to the export of draught fan, and the clean flue gas after desulfurization reaction flue, dust remover desulfurization are removed dust is discharged into the atmosphere by the chimney through the export flue, the entry of bypass channel connection conveying fan is passed through in the export of draught fan, the export of conveying fan inserts the grinding machine, carries to the desulfurization reaction flue in with the desulfurizer after grinding in the grinding machine through conveying fan. The waste gas desulfurization device has high removal efficiency, can ensure the long-term stable and uniform distribution of the desulfurizer in the hot waste gas, and can reduce energy consumption.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a technical field that environmental protection technology equipped, especially a waste gas desulfurization device of dry process.
[ background of the invention ]
The existing design of the waste gas desulfurization system generally adopts wet, semi-dry and dry desulfurization modes at present. The wet desulphurization technology has high desulphurization efficiency, but the temperature of flue gas after desulphurization is reduced too much, and the flue gas is in a wet saturation state, thereby making great difficulty for subsequent denitration and dust removal. The semi-dry desulfurization adopts water or desulfurizer slurry sprayed into a reaction tower, the humidity of the desulfurized waste gas is not as high as that of a wet method, but the temperature of the waste gas can be reduced, the subsequent SCR denitration is not favorable, a large amount of semi-dry desulfurization ash cannot be effectively utilized and can only be treated by landfill, and dust and leachate in the landfill process cause secondary pollution, so that the semi-dry desulfurization generates new pollution while controlling the pollution. The dry desulfurization is that high-efficiency desulfurizer (sodium bicarbonate) is ground into fine powder in a grinder and then is uniformly sprayed in a waste gas pipeline by a fan, the desulfurizer is thermally activated in the pipeline, the specific surface area is rapidly increased, the desulfurizer is fully contacted with waste gas in the pipeline to generate physical and chemical reactions, acidic substances such as sulfur dioxide and the like in the flue gas are absorbed and purified, the desulfurization rate can reach over 90 percent, no process water is needed, no heating is needed, the process and the equipment are simple, the energy is saved, the efficiency is high, the process and the equipment are clean and pollution-free, and the application range is wide.
In chinese patent with publication number CN 210584463U, a device for CDQ pressure regulation, diffused gas desulfurization and dust removal is disclosed, wherein an air inlet and an air outlet pipeline are connected to the grinder, the air outlet pipeline is connected to an inlet of a conveying fan, and an outlet pipeline of the conveying fan is connected to a powder inlet of the desulfurization reaction system. The conveying fan behind the grinding machine has the following defects: firstly, because the hygroscopicity of sodium bicarbonate is stronger and easy to bond, and the air inlet of the conveying fan is directly communicated with the atmosphere, especially in the south with higher air temperature, water vapor in the air can be immediately absorbed by the sodium bicarbonate in the conveying process, and can gradually form scale on a conveying pipeline to influence the operation. Secondly, the oxygen content of waste gas can be increased after the air is directly sucked into the waste gas flue, and the air with lower temperature is directly contacted and mixed with the hot waste gas, so that the corrosion damage of the spray pipe can be accelerated under the factors, and the uniform distribution of the sodium bicarbonate dry powder in the hot waste gas is not facilitated. The chinese patent application publication No. CN104324605A discloses a dry desulfurizing agent pretreatment system and a pretreatment method, wherein a quantitative valve is disposed in a communication pipeline between a sodium bicarbonate storage tank and a puffing device, and a heating and roasting device is disposed in the puffing device to preheat and decompose sodium bicarbonate therein. The defects of the method are that the method needs electric heating, has large energy consumption, is difficult to control the temperature, and the preheated sodium bicarbonate is not uniformly heated.
[ Utility model ] content
The utility model aims at solving the problem in the prior art, providing a waste gas desulfurization device of dry process, the desorption is efficient, can guarantee the long-term evenly distributed steadily of desulfurizer in hot waste gas to reducible energy consumption.
In order to achieve the purpose, the utility model provides a dry-method waste gas desulfurization device, which comprises a storage bin, a feeding machine, a grinding machine, a conveying fan, a desulfurization reaction flue, a dust remover, an induced draft fan and a chimney, wherein the desulfurization reaction flue, the dust remover, the induced draft fan and the chimney are sequentially arranged along the flue gas treatment direction, the storage bin is used for storing a desulfurizer, a feed inlet of the feeding machine is connected with the storage bin, a discharge outlet of the feeding machine is connected with the grinding machine and used for conveying the desulfurizer to the grinding machine, the discharge outlet of the grinding machine is connected with the desulfurization reaction flue, an inlet of the dust remover is connected with an exhaust end of a furnace through the desulfurization reaction flue, an outlet of the dust remover is connected with the induced draft fan, an outlet of the induced draft fan is connected with the chimney through a main channel, clean flue gas desulfurized and dedusted by the desulfurization reaction flue and the dust remover is discharged into the atmosphere through the chimney through the outlet flue, and an outlet of the induced draft fan is connected with an inlet of the conveying fan through a bypass channel, and an outlet of the conveying fan is connected to the grinding machine, and the desulfurizer ground in the grinding machine is conveyed to the desulfurization reaction flue through the conveying fan.
Preferably, the fine powder of the desulfurizer ground by the grinding machine has adjustable particle size, and the range of the fine powder is 10-60 mu m.
Preferably, the fineness d90 of the desulfurizing agent output by the mill is <20 μm.
Preferably, the outlet of the grinding mill is communicated with the desulfurization reaction flue through an access pipeline, and a heat preservation device is coated outside the access pipeline.
Preferably, the conveying fan is a high-temperature variable-frequency fan, and an air volume adjusting device is arranged at the inlet of the conveying fan.
Preferably, the storage bin is arranged right above the grinding mill, and the storage bin is made of stainless steel.
Preferably, the bottom of the storage bin is provided with a blanking cone, and the included angle between the generatrix of the blanking cone and the horizontal is 65-75 degrees.
Preferably, the desulfurizing agent is sodium bicarbonate.
The utility model has the advantages that:
the utility model discloses a desulfurization reaction flue is sent into to the sodium bicarbonate farine after grinding to the hot waste gas of handling, and the desulfurizer through hot waste gas predecomposition reacts immediately with acid gas, and the desorption is efficient, and the device equipment is simple, convenient operation, and disposable investment cost is low. Compared with other technologies, the method has the following advantages that hot gas desulfurized after the induced draft fan is used as a conveying medium of the sodium bicarbonate:
1. the method is favorable for pre-decomposition of sodium bicarbonate in a grinding machine, and can increase the specific surface area of the desulfurizer in the waste gas pipeline in the same reaction time when the temperature of the waste gas is relatively low (130-150 ℃), thereby improving the desulfurization efficiency.
2. Compared with the method of directly using the atmosphere as a conveying medium, the method can reduce the oxygen content of the entering waste gas, reduce the spray pipe corrosion phenomenon generated when low-temperature air is directly contacted and mixed with hot waste gas, and ensure the long-term stable and uniform distribution of the desulfurizer in the hot waste gas.
3. The temperature in the hot waste gas is high, so that the moisture absorption and bonding chances of the desulfurizer in a conveying pipeline can be reduced, the pipeline is prevented from being blocked, and the normal conveying of the desulfurizer is facilitated.
4. Compared with the electric heating pretreatment, the waste heat in the waste gas is utilized, the energy consumption can be reduced, and the preheated and decomposed sodium bicarbonate is uniformly heated.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a dry flue gas desulfurization apparatus according to the present invention.
[ detailed description ] embodiments
Referring to fig. 1, the utility model relates to a dry flue gas desulfurization device, which comprises a storage bin 2, a feeder 3, a grinder 4, a conveying fan 5, a desulfurization reaction flue 6, a dust remover 7, an induced draft fan 8 and a chimney 9 which are sequentially arranged along the flue gas treatment direction, wherein the storage bin 2 is used for storing a desulfurizer, a feed inlet of the feeder 3 is connected with the storage bin 2, a discharge outlet of the feeder 3 is connected with the grinder 4 for conveying the desulfurizer to the grinder 4, the discharge outlet of the grinder 4 is connected with the desulfurization reaction flue 6, an inlet of the dust remover 7 is connected with an exhaust end of the kiln 1 through the desulfurization reaction flue 6, an outlet of the dust remover 7 is connected with the induced draft fan 8, an outlet of the induced draft fan 8 is connected with the chimney 9 through a main channel, and clean flue gas desulfurized and dedusted by the desulfurization reaction flue 6 and the dust remover 7 is discharged into the atmosphere through the outlet chimney 9, the export of draught fan 8 passes through bypass channel and connects the entry of conveyor fan 5, the export of conveyor fan 5 inserts and grinds machine 4, carries the desulfurizer after grinding in will grinding machine 4 to desulfurization reaction flue 6 in through conveyor fan 5.
Furthermore, the granularity of fine powder of the desulfurizer ground by the grinding machine 4 is adjustable and ranges from 10 to 60 mu m. The grinding machine 4 is an integrated device and comprises a buffer bin, a variable frequency screw machine, a mixer, a grading motor and a grinding main body device.
Further, the fineness d90 of the desulfurizing agent outputted from the mill 4 in this embodiment is <20 μm.
Furthermore, the outlet of the grinding machine 4 is communicated with the desulfurization reaction flue 6 through an access pipeline and a spray pipe, the access pipeline is externally coated with a heat preservation device to prevent heat loss and flue gas condensation in the pipeline, and the spray pipe is a partial pipeline which is arranged at the rear end of an outlet conveying pipeline of the grinding machine and extends into the desulfurization reaction flue.
Further, the conveying fan 5 adopts a high-temperature variable-frequency fan, and an air volume adjusting device is arranged at an inlet of the conveying fan 5.
Further, the storage bin 2 is arranged right above the grinding machine 4, and the storage bin 2 is made of stainless steel.
Further, the desulfurizing agent is sodium bicarbonate.
Furthermore, the bottom of the storage bin 2 is provided with a blanking cone, and the included angle between the generatrix of the blanking cone and the horizontal plane is 65-75 degrees, which is beneficial for sodium bicarbonate to naturally flow into the grinding machine 4.
Furthermore, the desulfurization reaction flue 6 can utilize the original square pipeline through which the waste gas flows, and can also be redesigned into a circular pipeline, so that the retention time of the waste gas in the circular pipeline is ensured to be more than 3 seconds.
Furthermore, the dust remover 7 adopts a bag-type dust remover, and sodium bicarbonate adsorbed on the bag can continuously react with acidic waste gas in the waste gas so as to improve the removal efficiency.
The utility model discloses the working process:
the utility model relates to a waste gas desulfurization dress of dry processDuring the use process, dry powder sodium bicarbonate serving as a desulfurizing agent and meeting the quality requirement is put into a storage bin 2 through a ton bag, then is added into a grinder 4 through a feeder 3, and the fineness of the sodium bicarbonate in the grinder 4 is ground to d90<20 mu m, is sent into a desulfurization reaction flue 6 through a conveying fan 5 and a spray pipe, sodium bicarbonate is mixed with high-temperature waste gas generated by the furnace kiln 1 in the desulfurization reaction flue 6, a desulfurizer is thermally activated in the flue, a microporous structure is formed on the surface, the specific surface area is rapidly increased as if popcorn is exploded, the flue gas in the flue is fully contacted with the activated desulfurizer to generate physical and chemical reactions, and SO in the flue gas2And other acidic media are absorbed, purified, desulfurized and dried Na2SO4The by-products enter the dust remover 7 along with the air flow to be captured, further desulfurization reaction and smoke purification are carried out, and the purified flue gas after desulfurization and dust removal is pumped by the induced draft fan 8 and is discharged into the atmosphere through the outlet flue and the chimney 9.
The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.
Claims (8)
1. A dry flue gas desulfurization apparatus, characterized in that: including storage bin (2), batcher (3), grinding machine (4) and conveyor fan (5) to and desulfurization reaction flue (6), dust remover (7), draught fan (8) and chimney (9) that set gradually along the flue gas treatment direction, storage bin (2) are used for storing the desulfurizer, the feed inlet and storage bin (2) of batcher (3) are connected, and the discharge gate and the grinding machine (4) of batcher (3) are connected, are used for to grinding machine (4) the desulfurizer, the discharge gate of grinding machine (4) inserts desulfurization reaction flue (6), the exhaust end of kiln (1) is connected through desulfurization reaction flue (6) in the import of dust remover (7), the export of dust remover (7) links to each other with draught fan (8), chimney (9) are connected through the main entrance to the export of draught fan (8), through desulfurization reaction flue (6), The clean flue gas after dust remover (7) desulfurization dust removal is discharged into the atmosphere by chimney (9) through the export flue, the export of draught fan (8) passes through the entry of bypass channel connection conveyor fan (5), the export of conveyor fan (5) is inserted and is ground machine (4), carries the desulfurizer after grinding in will grinding machine (4) to desulfurization reaction flue (6) in through conveyor fan (5).
2. A dry flue gas desulfurization apparatus according to claim 1, wherein: the fine powder of the desulfurizer ground by the grinder (4) has adjustable granularity, and the range is 10-60 mu m.
3. A dry flue gas desulfurization apparatus according to claim 2, wherein: the fineness d90 of the desulfurizing agent output by the grinder (4) is less than 20 mu m.
4. A dry flue gas desulfurization apparatus according to claim 1, wherein: the outlet of the grinding machine (4) is communicated with the desulfurization reaction flue (6) through an access pipeline, and a heat preservation device is coated outside the access pipeline.
5. A dry flue gas desulfurization apparatus according to claim 1, wherein: the conveying fan (5) adopts a high-temperature variable-frequency fan, and an air volume adjusting device is arranged at the inlet of the conveying fan (5).
6. A dry flue gas desulfurization apparatus according to claim 1, wherein: the storage bin (2) is arranged right above the grinding machine (4), and the storage bin (2) is made of stainless steel.
7. A dry flue gas desulfurization apparatus according to claim 6, wherein: the bottom of the storage bin (2) is provided with a blanking cone, and the included angle between the generatrix of the blanking cone and the horizontal plane is 65-75 degrees.
8. A dry flue gas desulfurization apparatus according to any one of claims 1 to 7, characterized in that: the desulfurizer is sodium bicarbonate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120500643.8U CN214598257U (en) | 2021-03-09 | 2021-03-09 | Dry-method waste gas desulfurization device |
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| CN202120500643.8U CN214598257U (en) | 2021-03-09 | 2021-03-09 | Dry-method waste gas desulfurization device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113926298A (en) * | 2021-11-08 | 2022-01-14 | 江苏天洁环保装备有限公司 | Sodium-based dry flue gas desulfurization process |
| CN115253657A (en) * | 2022-08-31 | 2022-11-01 | 上海梅山钢铁股份有限公司 | Full-combustion gas boiler flue gas desulfurization efficiency promotion control device |
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2021
- 2021-03-09 CN CN202120500643.8U patent/CN214598257U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113926298A (en) * | 2021-11-08 | 2022-01-14 | 江苏天洁环保装备有限公司 | Sodium-based dry flue gas desulfurization process |
| CN115253657A (en) * | 2022-08-31 | 2022-11-01 | 上海梅山钢铁股份有限公司 | Full-combustion gas boiler flue gas desulfurization efficiency promotion control device |
| CN115253657B (en) * | 2022-08-31 | 2023-08-15 | 上海梅山钢铁股份有限公司 | Flue gas desulfurization efficiency lifting control device of full-burning gas boiler |
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