CN219631002U - Circulating fluidized bed desulfurization device with coupling steam utilization function - Google Patents
Circulating fluidized bed desulfurization device with coupling steam utilization function Download PDFInfo
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- CN219631002U CN219631002U CN202223542951.0U CN202223542951U CN219631002U CN 219631002 U CN219631002 U CN 219631002U CN 202223542951 U CN202223542951 U CN 202223542951U CN 219631002 U CN219631002 U CN 219631002U
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- steam
- circulating
- absorption tower
- ash
- fluidized bed
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 37
- 230000023556 desulfurization Effects 0.000 title claims abstract description 37
- 230000008878 coupling Effects 0.000 title claims abstract description 14
- 238000010168 coupling process Methods 0.000 title claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 27
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002250 absorbent Substances 0.000 claims abstract description 21
- 230000002745 absorbent Effects 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000012216 screening Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 4
- 239000007790 solid phase Substances 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 239000006227 byproduct Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000003009 desulfurizing effect Effects 0.000 description 5
- 235000010269 sulphur dioxide Nutrition 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000004291 sulphur dioxide Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a circulating fluidized bed desulfurization device for coupling steam utilization, and belongs to the technical field of flue gas purification. The device mainly comprises an absorption tower (1), a cyclone separator (2), a circulating ash bucket (3) and a steam kinetic energy mill (4). The steam is used as a power source for crushing, screening and carrying and conveying the circulating ash particles, so that unreacted absorbent can participate in the reaction again, the distribution uniformity and the mixing effect of the gas, liquid and solid phases in the absorption tower are enhanced, the existence time of liquid drops is prolonged, and the desulfurization efficiency and the absorbent utilization rate are improved.
Description
Technical Field
The utility model relates to the technical field of flue gas purification, in particular to a circulating fluidized bed desulfurization device utilizing coupling steam.
Background
At present, flue gas desulfurization processes can be basically divided into three types: wet, dry and semi-dry processes. The desulfurizing agent of the wet desulfurization process adopts a slurry form, the water content of the desulfurization byproducts is higher, and the byproducts with lower water content can be obtained after concentration and dehydration; the dry desulfurization adopts a dry desulfurizing agent, and desulfurization byproducts are also dry solids; the semi-dry process is intermediate between the wet and dry processes, and the desulfurizing agent is present in the desulfurizing process in the form of atomized or humidified small particles, and the byproduct is a solid in a dry state. Compared with the wet desulfurization process, the flue gas circulating fluidized bed desulfurization process has the characteristics of low investment and operation cost, less system equipment, small occupied area, no desulfurization wastewater discharge and the like, and has good application prospect.
In the flue gas circulating fluidized bed desulfurization process, absorbent droplets, desulfurization circulating ash, flue gas and the like interact in an absorption tower at the same time, and the mixing effect of gas-liquid-solid three-phase flow and the existence time of the droplets have significant influence on desulfurization efficiency.
Disclosure of Invention
The utility model provides a circulating fluidized bed desulfurization device with coupled steam utilization, which utilizes steam as a power source for crushing, screening and carrying and conveying circulating ash particles, can make unreacted absorbent participate in the reaction again, enhances the distribution uniformity and the mixing effect of gas, liquid and solid phases in an absorption tower, prolongs the existence time of liquid drops, and is beneficial to improving the desulfurization efficiency and the absorbent utilization rate.
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, which is characterized by comprising an absorption tower (1), a cyclone separator (2), a circulating ash bucket (3) and a steam kinetic energy mill (4); the absorption tower (1) is provided with a discharge port (100), a flue gas inlet (101), an absorbent nozzle (110), a circulating ash nozzle (111), a humidifying water nozzle (121) and a flue gas outlet (122).
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, which is characterized in that a cyclone separator (2) is connected with a flue gas outlet (122) of an absorption tower (1) and a circulating ash bucket (3); the circulating ash bucket (3) is connected with the steam kinetic energy mill (4) through an ash discharge valve (31) and is provided with an ash discharge valve (30).
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, which is characterized in that a steam kinetic energy mill (4) is connected with a circulating ash nozzle (111) and also connected with a steam flow regulating valve (40).
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, wherein flue gas containing sulfur dioxide enters an absorption tower (1) through a flue gas inlet (101), an absorbent is pretreated and enters the absorption tower (1) through an absorbent nozzle (110) under the carrying of conveying wind, and solid particles from a circulating ash bucket (3) are crushed under the action of a steam kinetic energy mill (4) and carried by steam and enter the absorption tower (1) through a circulating ash nozzle (111).
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, wherein atomized liquid drops are formed after humidifying water enters an absorption tower (1) and are adhered to the surfaces of solid particles, an absorbent reacts with sulfur dioxide in flue gas under the action of the liquid drops, the generated desulfurization byproducts are solid, the solid desulfurization byproducts, the flue gas and the unreacted complete absorbent enter a cyclone separator (2) through a flue gas outlet (122) of the absorption tower (1), wherein solid particles with larger granularity are complemented and enter a circulating ash bucket (3), and the solid particles with smaller granularity enter downstream dust removing equipment along with a flue gas discharging device.
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, which utilizes steam kinetic energy in a steam kinetic energy mill (4) to realize crushing and screening of circulating ash particles, the diameter of the treated circulating ash particles is reduced, and unreacted absorbent partially wrapped by reaction byproducts can participate in the reaction again on the surfaces of newly formed particles, so that the utilization rate of the absorbent is improved.
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, which utilizes steam kinetic energy in a steam kinetic energy mill (4) to realize crushing and screening of circulating ash particles, reduces the diameter of the treated circulating ash particles, and can enhance the distribution uniformity of gas, liquid and solid phases in an absorption tower, thereby being beneficial to improving desulfurization efficiency.
The utility model provides a circulating fluidized bed desulfurization device for coupling steam utilization, wherein circulating ash particles subjected to crushing and screening enter an absorption tower together under the carrying of steam, so that the mixing effect can be enhanced, and the improvement of the partial pressure of water steam in the absorption tower can inhibit the evaporation of liquid drops to a certain extent, thereby being beneficial to prolonging the existence time of the liquid drops and improving the desulfurization efficiency.
Based on the above summary, the present utility model has the following beneficial effects:
1. the circulating ash particles are crushed and screened by utilizing steam kinetic energy, and part of unreacted absorbent wrapped by reaction byproducts can participate in the reaction again on the surfaces of the newly formed particles, so that the utilization rate of the absorbent is improved, and after the diameter of the circulating ash particles is reduced, the distribution uniformity of gas, liquid and solid phases in the absorption tower can be enhanced, so that the desulfurization efficiency is improved.
2. The steam carries the circulating ash particles which are crushed and screened to enter the absorption tower together, so that the mixing effect can be enhanced, and the improvement of the partial pressure of the steam in the absorption tower can form a certain inhibition effect on the evaporation of liquid drops, thereby being beneficial to prolonging the existing time of the liquid drops and improving the desulfurization efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a circulating fluidized bed desulfurization device utilizing coupling steam.
The device comprises a 1-absorption tower, a 100-discharge port, a 101-flue gas inlet, a 110-absorbent nozzle, a 111-circulating ash nozzle, a 121-humidifying water nozzle, a 122-flue gas outlet, a 2-cyclone separator, a 3-circulating ash bucket, a 30-ash discharge valve, a 31-ash discharge valve, a 4-steam kinetic energy mill and a 40-steam flow regulating valve.
Detailed Description
The following describes specific embodiments of the present utility model in detail with reference to the drawings.
Example 1
The rated flow is 400000 Nm by adopting a flue gas circulating fluidized bed desulfurization device shown in figure 1 3 Desulfurizing the flue gas at the rate of 1600 mg/Nm 3 (dry state) the required outlet sulphur dioxide content was 35 mg/Nm 3 (dry state). Quicklime with calcium oxide content of 90% is used as absorbent. The circulating ash is sent into the absorption tower (1) through the circulating ash nozzle (111) by matching and adjusting the opening degrees of the steam flow regulating valve (40), the ash discharging valve (31) and the ash discharging valve (30). Accordingly, the absorbent and the spray water are fed into the absorption tower (1) through the absorbent spouts (110) and the humidifying water spouts (121), respectively. The temperature of the flue gas at the outlet of the cyclone separator (2) is controlled to be not lower than 70 ℃ by adjusting the flow of the humidified water. The sulfur dioxide content of the outlet of the cyclone separator (2) meets the emission requirement.
Claims (3)
1. The circulating fluidized bed desulfurization device for coupling steam utilization is characterized by comprising an absorption tower (1), a cyclone separator (2), a circulating ash bucket (3) and a steam kinetic energy mill (4); the absorption tower (1) is provided with a discharge port (100), a flue gas inlet (101), an absorbent nozzle (110), a circulating ash nozzle (111), a humidifying water nozzle (121) and a flue gas outlet (122); the circulating ash bucket (3) is connected with the steam kinetic energy mill (4) through an ash discharge valve (31) and is provided with an ash discharge valve (30); the steam kinetic energy mill (4) is connected with a circulating ash nozzle (111) of the absorption tower (1) and is also connected with a steam flow regulating valve (40); the opening degrees of the steam flow regulating valve (40), the ash discharging valve (31) and the ash discharging valve (30) are adjusted in a matched mode, so that circulating ash solid particles from the circulating ash hopper (3) are crushed under the action of the steam kinetic energy mill (4) and carried by steam, and enter the absorption tower (1) through the circulating ash spout (111).
2. The circulating fluidized bed desulfurization apparatus of coupled steam utilization according to claim 1, wherein the cyclone separator (2) is connected with a flue gas outlet (122) of the absorption tower (1) and a circulating ash bucket (3).
3. The coupled steam utilized circulating fluidized bed desulfurization apparatus of claim 1, wherein the absorbent and spray water enter the absorption tower (1) through an absorbent nozzle (110) and a humidifying water nozzle (121), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223542951.0U CN219631002U (en) | 2022-12-30 | 2022-12-30 | Circulating fluidized bed desulfurization device with coupling steam utilization function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223542951.0U CN219631002U (en) | 2022-12-30 | 2022-12-30 | Circulating fluidized bed desulfurization device with coupling steam utilization function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219631002U true CN219631002U (en) | 2023-09-05 |
Family
ID=87809434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223542951.0U Active CN219631002U (en) | 2022-12-30 | 2022-12-30 | Circulating fluidized bed desulfurization device with coupling steam utilization function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219631002U (en) |
-
2022
- 2022-12-30 CN CN202223542951.0U patent/CN219631002U/en active Active
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