CN220194487U - Full dry desulfurizing device - Google Patents
Full dry desulfurizing device Download PDFInfo
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- CN220194487U CN220194487U CN202321350741.3U CN202321350741U CN220194487U CN 220194487 U CN220194487 U CN 220194487U CN 202321350741 U CN202321350741 U CN 202321350741U CN 220194487 U CN220194487 U CN 220194487U
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- powder
- desulfurizing tower
- desulfurizing
- desulfurizing agent
- agent hopper
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- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 67
- 239000000843 powder Substances 0.000 claims abstract description 54
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 45
- 230000023556 desulfurization Effects 0.000 claims abstract description 45
- 239000000428 dust Substances 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- 238000000227 grinding Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 4
- 239000011734 sodium Substances 0.000 description 11
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 10
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 5
- 235000017557 sodium bicarbonate Nutrition 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a full-dry desulfurization device, which comprises a desulfurizing agent hopper, wherein a powder metering feeder is arranged at the lower part of the desulfurizing agent hopper, a discharge port of the powder metering feeder is connected with a grinder, a discharge port of the grinder is connected with a powder conveying pipeline, the powder conveying pipeline is connected with a desulfurizing tower, a powder multi-way sprayer with a feed port communicated with the powder conveying pipeline is arranged in the desulfurizing tower, the powder multi-way sprayer is connected with a high-pressure air source, an air inlet of the desulfurizing tower is connected with an air inlet device, and an air outlet of the desulfurizing tower is connected with a dust collector; by adopting the technical scheme, the desulfurization process basically has no temperature drop, has no influence on a boiler system generating high-temperature flue gas, and the dust removing device can be directly connected with an original chimney to discharge purified gas; the process flow is simple, the operation and maintenance are convenient, and the automation degree is high; the application range is wide, the disposable investment is small, and the operation cost is low.
Description
Technical Field
The utility model relates to desulfurization equipment, in particular to a full-dry desulfurization device.
Background
The fuel composition is mainly coal, which accounts for about 80% of the total energy consumption, SO that the coal combustion becomes a main source of Chinese atmospheric pollution, in particular SO (sulfur dioxide) in the coal 2 Is a main cause of acid rain, and causes great harm to the ecological environment and human economy. Along with the clear and definite national sulfur dioxide specific emission reduction indexes and the continuous increase of emission reduction force, the competition of the desulfurization industry is aggravated, and the requirements on the desulfurization process are more and more severe along with the epidemic situation influence. The types of flue gas desulfurization technology reach dozens, and the flue gas desulfurization is divided into three main types of desulfurization technologies, namely a wet process, a semi-dry process and a dry process according to whether water is added in the desulfurization process or not and the dry-wet form of desulfurization products.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the full dry desulfurization device with high desulfurization efficiency and convenient operation and maintenance.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the full dry desulfurization device comprises a desulfurizing agent hopper, a powder metering feeder is arranged at the lower part of the desulfurizing agent hopper, a grinding machine is connected with a discharge port of the powder metering feeder, a powder conveying pipeline is connected with a discharge port of the grinding machine, the powder conveying pipeline is connected with a desulfurizing tower, a powder multi-way sprayer with a feeding port communicated with the powder conveying pipeline is arranged in the desulfurizing tower, the powder multi-way sprayer is connected with a high-pressure air source, an air inlet of the desulfurizing tower is connected with an air inlet device, and an air outlet of the desulfurizing tower is connected with a dust collector.
As a preferable technical scheme, two powder metering feeders capable of working in turn are arranged in parallel at the lower part of the desulfurizing agent hopper.
As a preferable technical scheme, the air inlet device comprises a high-temperature flue gas pipeline for conveying high-temperature flue gas to be desulfurized into the desulfurizing tower.
As a preferable technical scheme, the dust removing device comprises a bag-type dust remover with an air inlet connected with an air outlet of the desulfurizing tower, a net air outlet of the bag-type dust remover is connected with a chimney, and an ash discharging port is arranged at the bottom of the bag-type dust remover.
As a preferable technical scheme, a draught fan is arranged on a connecting pipeline between the bag-type dust collector and the chimney.
As a preferable technical scheme, a cooling sleeve is arranged on a pipeline between the desulfurizing tower and the bag-type dust collector.
As a preferred technical scheme, be provided with dustproof dampproofing device outside the desulfurizing agent hopper, dustproof dampproofing device is including encircleing the setting and being in the flashing board in the desulfurizing agent hopper outside, the top of flashing board is provided with rain-proof top cap, rain-proof top cap with be connected with the induced air pipe between the dust collector.
Due to the adoption of the technical scheme, the full-dry desulfurization device comprises a desulfurizing agent hopper, wherein a powder metering feeder is arranged at the lower part of the desulfurizing agent hopper, a discharge port of the powder metering feeder is connected with a grinder, a discharge port of the grinder is connected with a powder conveying pipeline, the powder conveying pipeline is connected with a desulfurizing tower, a powder multipath sprayer with a feed port communicated with the powder conveying pipeline is arranged in the desulfurizing tower, the powder multipath sprayer is connected with a high-pressure air source, an air inlet of the desulfurizing tower is connected with an air inlet device, and an air outlet of the desulfurizing tower is connected with a dust collector; by adopting the technical scheme, the desulfurization process basically has no temperature drop, no influence on a boiler system, and the dust removing device can be directly connected with an original chimney to discharge purified gas; the process flow is simple, the operation and maintenance are convenient, and the automation degree is high; the application range is wide, the disposable investment is small, and the operation cost is low.
Drawings
The following drawings are only for purposes of illustration and explanation of the present utility model and are not intended to limit the scope of the utility model. Wherein:
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
in the figure: 1-a desulfurizing agent hopper; 2-grinding the machine; 3-desulfurizing tower; 4-a high-temperature flue gas pipeline; 51-a bag-type dust remover; 52-ash discharge port; 6-chimney; 7-cooling jacket; 8-boiler.
Detailed Description
The utility model is further illustrated in the following, in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present utility model are described by way of illustration only. It is needless to say that the person skilled in the art realizes that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive in scope.
As shown in fig. 1, the full dry desulfurization device comprises a desulfurizing agent hopper 1, a powder metering feeder (not shown in the figure) is installed at the lower part of the desulfurizing agent hopper 1, a discharge port of the powder metering feeder is connected with a grinder 2, a discharge port of the grinder 2 is connected with a powder conveying pipeline, the powder conveying pipeline is connected with a desulfurizing tower 3, a powder multi-way sprayer (not shown in the figure) with a feed port communicated with the powder conveying pipeline is installed in the desulfurizing tower 3, the powder multi-way sprayer is connected with a high-pressure air source (not shown in the figure), an air inlet of the desulfurizing tower 3 is connected with an air inlet device, and an air outlet of the desulfurizing tower 3 is connected with a dust collector.
Two powder metering feeders capable of working in turn are arranged in parallel at the lower part of the desulfurizing agent hopper 1, and when one powder metering feeder fails, the other powder metering feeder is used, and meanwhile, the failed powder metering feeder is overhauled.
The air inlet device comprises a high-temperature flue gas pipeline 4 for conveying high-temperature flue gas to be desulfurized into the desulfurizing tower 3. The dust removing device comprises a bag-type dust remover 51 with an air inlet connected with an air outlet of the desulfurizing tower 3, a clean air outlet of the bag-type dust remover 51 is connected with a chimney 6, and an ash discharging port 52 is arranged at the bottom of the bag-type dust remover 51. And an induced draft fan is arranged on a connecting pipeline between the bag-type dust collector 51 and the chimney 6. A cooling sleeve 7 is arranged on a pipeline between the desulfurizing tower 3 and the bag-type dust collector 51, and cooling medium in the cooling sleeve 7 can primarily cool the gas in the pipeline to protect the bag in the bag-type dust collector 51.
The desulfurizing agent hopper 1 is provided with dustproof dampproofing device outward, dustproof dampproofing device is including encircleing setting up the weather guard (not shown in the figure) in the desulfurizing agent hopper 1 outside, the top of weather guard is provided with rain-proof top cap (not shown in the figure), rain-proof top cap with be connected with induced air pipe (not shown in the figure) between the dust collector.
The full dry desulfurization device adopts the sodium-based desulfurizing agent to carry out in-tower desulfurization, and the reaction product is solid dust after absorbing sulfur dioxide, so that the problem of scaling and blocking can not be caused. On the other hand, the desulfurization products are collected in a concentrated way outside the tower, so that the desulfurization products are convenient to store and transport. The full dry desulfurization reduces investment and operation cost, and is relatively suitable for desulfurization reconstruction of the medium-small boiler 8.
The full dry flue gas desulfurization technology uses sodium bicarbonate as a starting desulfurizing agent, and the prepared sodium bicarbonate is directly injected into a desulfurizing tower 3 to wash and remove SO in flue gas 2 The purpose of flue gas desulfurization is achieved, and then desulfurization products are collected outside the tower.
The full dry desulfurization device has the advantages that:
1) The desulfurization efficiency of the full dry method is more than or equal to 98 percent.
2) Sodium alkali is adopted as the desulfurizing agent, so that scaling in the tower is effectively avoided.
3) The whole process is free of water, the smoke has no temperature drop, and the heat efficiency is high.
4) The primary investment is saved, the running cost is low, and the domestic degree is high.
5) The application range is wide.
The full dry flue gas desulfurization process adopted by the technical scheme is different from other wet desulfurization reaction mechanisms such as double-alkali desulfurization, limestone/lime and the like, the neutralization reaction of sodium bicarbonate acid actually relates to a thermal activation stage, and the sodium bicarbonate fine powder just crushed contacts hot flue gas, so that the sodium bicarbonate is quickly converted into sodium carbonate, and the sodium carbonate has a high proportion of surface area (the surface area can be increased by more than 10 times) and porosity. The fresh and high surface area sodium carbonate can react with acid gas fast and effectively, and acid (hydrochloric acid, sulfur dioxide, hydrofluoric acid, etc.) neutralizes and absorbs heavy metals, dioxin and furan in the process.
The reaction equation is as follows:
NaHCO 3 ＝Na 2 CO 3 +H 2 O+CO 2
by forming Na 2 CO 3 Larger grain boundary action regions are formed. Production of Na 2 CO 3 When no crystal lattice exists, therefore Na 2 CO 3 Is very active when the flue gas temperature is above 140 ℃, na 2 CO 3 Will react immediately with the acidic contaminants in the flue gas.
Due to newly produced Na 2 CO 3 The reaction has high reactivity at the moment of reaction, the temperature of the flue gas of the boiler 8 is 140-400 ℃, and the flue gas can spontaneously react with acid pollutants in the flue gas to produce Na 2 SO 4 Realize SO removal 2 The following effects:
SO 2 +2NaHCO 3 ＝Na 2 SO 3 +H 2 O+2CO 2
SO 3 +2NaHCO 3 ＝Na 2 SO 4 +H 2 O+2CO 2
HF+NaHCO 3 ＝NaF+H 2 O+CO 2
HCl+NaHCO 3 ＝NaCl+H 2 O+CO 2
less part of SO 2 The following reactions occur:
SO 2 +2NaHCO 3 +0.5O 2 ＝Na 2 SO 4 +H 2 O+2CO 2
for reasons of transportation and storage,NaHCO 3 the starting materials are generally coarse particles (d 50 values of generally 200 μm), and if high reactivity is to be achieved, adsorbents (NaHCO 3 ) Must have a large specific surface area, so that NaHCO must be added before it is injected into the desulfurizing tower 3 3 Grinding to a certain fineness, according to experience: SO removal 2 Selecting NaHCO 3 The grinding fineness d90 is less than 20um, and the desulfurization efficiency can reach more than 98 percent.
The powder metering feeder is arranged at the lower part of the desulfurizing agent hopper 1 in a volume type and is used for accurately metering and feeding the desulfurizing agent. The design of the powder metering feeder ensures that the powder metering feeder has higher usability and good accurate metering effect. The powder metering feeder system is designed by taking the characteristics of fluidity, compressibility, abrasion, wettability and the like of powder into consideration, and the device is designed with high reliability, so that the influence of the powder on the service life of equipment is minimized. The powder metering feeder is made of stainless steel, and can bear corrosion, especially corrosion resistance in high temperature. The arrangement of the internal passages is suitable for installation and removal of internal components for servicing. The arrangement of the powder metering feeders is uniformly considered in combination with the design of the desulfurizing tower 3, so that the operation and the maintenance are convenient. The powder metering feeder can be automatically switched when the powder metering feeder is transported and prepared and considered in an accident state. The measuring point of the powder metering feeder comprises: the measuring range of the powder in the hopper, the pressure of compressed air during conveying, and the like. Measures for preventing blockage are taken for the conveying device of the powder metering feeder.
The desulfurized dust-containing flue gas is laterally discharged from the top of the desulfurizing tower 3, is diverted to enter the bag-type dust remover 51, and is discharged into the chimney 6 through the induced draft fan. A small amount of desulfurization ash slag trapped by the dust remover is conveyed into a desulfurization ash warehouse through materials and then discharged through a tank truck or secondary conveying equipment.
In order to reduce the pollution of dust to the environment as much as possible, the technical scheme considers the requirement of the moisture-proof characteristic of the desulfurizing agent hopper 1, four sides of the desulfurizing agent hopper are surrounded by rain-proof plates, a rain-proof shed is added on a top cover, an induced air pipe is arranged above the desulfurizing agent hopper, the desulfurizing agent hopper is introduced into a cloth bag dust remover 51, and the desulfurizing agent hopper is discharged through a dust collection fan. The flow rate of the materials is controlled by a bar gate below the desulfurizing agent hopper 1.
The full-dry desulfurization device has high desulfurization efficiency,can easily achieve ultra-low emission standard (sulfur dioxide concentration is less than or equal to 35 mg/Nm) 3 ) The method comprises the steps of carrying out a first treatment on the surface of the The desulfurization process basically has no temperature drop, has no influence on a boiler 8 system, and can be directly discharged from an original chimney 6; the process flow is simple, the operation and maintenance are convenient, and the automation degree is high; the application range is wide, the disposable investment is small, and the operation cost is low. Along with the continuous improvement of the domestic environmental protection requirement, the improvement and optimization of the desulfurization process are imperative.
The foregoing has shown and described the basic principles, main features and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (7)
1. The full dry desulfurization device is characterized in that: the desulfurizing agent hopper is characterized by comprising a desulfurizing agent hopper, a powder metering feeder is arranged at the lower part of the desulfurizing agent hopper, a grinding machine is connected with a discharge port of the powder metering feeder, a powder conveying pipeline is connected with a discharge port of the grinding machine, the powder conveying pipeline is connected with a desulfurizing tower, a powder multi-way sprayer with a feed inlet communicated with the powder conveying pipeline is arranged in the desulfurizing tower, the powder multi-way sprayer is connected with a high-pressure air source, an air inlet of the desulfurizing tower is connected with an air inlet device, and an air outlet of the desulfurizing tower is connected with a dust collector.
2. The all-dry desulfurization apparatus according to claim 1, wherein: two powder metering feeders capable of working in turn are arranged in parallel at the lower part of the desulfurizing agent hopper.
3. The all-dry desulfurization apparatus according to claim 1, wherein: the air inlet device comprises a high-temperature flue gas pipeline for conveying high-temperature flue gas to be desulfurized into the desulfurizing tower.
4. The all-dry desulfurization apparatus according to claim 1, wherein: the dust removing device comprises a bag-type dust remover with an air inlet connected with an air outlet of the desulfurizing tower, a clean air outlet of the bag-type dust remover is connected with a chimney, and an ash discharging port is arranged at the bottom of the bag-type dust remover.
5. The all-dry desulfurization apparatus according to claim 4, wherein: and a draught fan is arranged on a connecting pipeline between the bag-type dust collector and the chimney.
6. The all-dry desulfurization apparatus according to claim 4, wherein: and a cooling sleeve is arranged on a pipeline between the desulfurizing tower and the bag-type dust collector.
7. The all-dry desulfurization apparatus according to claim 1, wherein: the desulfurizing agent hopper is provided with dustproof dampproofing device outward, dustproof dampproofing device is including encircleing the setting and being in the flashing board in desulfurizing agent hopper outside, the top of flashing board is provided with rain-proof top cap, rain-proof top cap with be connected with the induced duct between the dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321350741.3U CN220194487U (en) | 2023-05-29 | 2023-05-29 | Full dry desulfurizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321350741.3U CN220194487U (en) | 2023-05-29 | 2023-05-29 | Full dry desulfurizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220194487U true CN220194487U (en) | 2023-12-19 |
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ID=89139042
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321350741.3U Active CN220194487U (en) | 2023-05-29 | 2023-05-29 | Full dry desulfurizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220194487U (en) |
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2023
- 2023-05-29 CN CN202321350741.3U patent/CN220194487U/en active Active
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