CN220432531U - Floating water level seawater recovery system for seawater desulfurization - Google Patents
Floating water level seawater recovery system for seawater desulfurization Download PDFInfo
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- CN220432531U CN220432531U CN202321944490.1U CN202321944490U CN220432531U CN 220432531 U CN220432531 U CN 220432531U CN 202321944490 U CN202321944490 U CN 202321944490U CN 220432531 U CN220432531 U CN 220432531U
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- 239000013535 sea water Substances 0.000 title claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 33
- 230000023556 desulfurization Effects 0.000 title claims abstract description 33
- 238000007667 floating Methods 0.000 title claims abstract description 22
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 238000005273 aeration Methods 0.000 claims abstract description 143
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 230000003009 desulfurizing effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The floating water level seawater recovery system for seawater desulfurization of the present utility model comprises: the device comprises a circulating pump, a condenser, an aeration tank, an aeration fan, an aeration device, a desulfurization device, a seawater booster pump and a drainage ditch, wherein seawater in the sea is connected with an inlet of the condenser through the circulating pump, an outlet of the condenser is communicated with a front tank area of the aeration tank through a pipeline, an inlet of the desulfurization device is connected with an outlet pipeline of the condenser through the seawater booster pump, an outlet of the desulfurization device is communicated with the front tank area of the aeration tank through a pipeline, the aeration tank is sequentially divided into the front tank area, the aeration area and the drainage area by two weir plates, the aeration device is arranged in the aeration area, the aeration fan is connected with the aeration device through an air channel, air is fed into the aeration area, a water outlet of the drainage area is discharged into the sea through the drainage ditch, the aeration fan is a variable-frequency fan, the heights of the two weir plates are the same, and the elevations of the weir plates are the liquid level of the low-tide drainage area- (0.1-0.5) m, so that the water levels of the front tank area, the aeration area and the drainage area are the same.
Description
Technical Field
The utility model relates to the technical field of wet flue gas desulfurization, in particular to a floating water level seawater recovery system for seawater desulfurization.
Background
In recent years, new coal consumption projects are strictly controlled in China, coal decrement substitution is implemented, and clean and efficient utilization of coal is continuously promoted. The coal consumption of the coal-fired power plants in each province is controlled in a unified way, and measures are taken to reduce the station power consumption, so that the power supply coal consumption can be reduced. The sea power plant adopts a sea water desulfurization process with low power consumption. In the flue gas seawater desulfurization process, an aeration tank of a seawater recovery system is arranged between drainage channels of a condenser, and the liquid level of a front tank of the aeration tank directly influences the geometric lift of water supply of a circulating pump. In the existing project, the aeration tank is arranged at a higher elevation, seawater recovered from the aeration area in the aeration tank overflows into the drainage tank, the seawater in the drainage tank is discharged to the open sea through the drainage channel, the liquid level of the drainage tank is influenced by the sea level, but the liquid level of the aeration area of the aeration tank is not influenced by the sea level. Under the condition of low tide level, the liquid level in the aeration zone and the liquid level in the drainage tank have larger drop, and the drop of the liquid level finally leads to the increase of the geometric lift of the circulating pump, so that the waste of the power of the circulating pump is caused.
The patent number is CN102397745B, the name is a seawater desulfurization process, a siphon well and an aeration tank in the prior art are combined into a whole, the siphon effect of the siphon well in the circulating water system is ensured by utilizing a weir in the aeration tank, and a siphon well structure is canceled; the aeration tank and the siphon well of the desulfurization system are combined into a whole, namely, the siphon well is simplified, and the aeration tank is also used as the siphon well. The technology has a partial optimization effect on the hydraulic conditions of the traditional circulating water system, but does not relate to an aeration tank of a key facility of a seawater recovery system, and the hydraulic conditions in the aeration tank have a large optimizable space.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a floating water level seawater recovery system for seawater desulfurization, which is characterized in that the direct-current cooling water of a seawater power plant is used as an absorbent for flue gas treatment, and an aeration tank of the seawater recovery system plays a role of a siphon well in a condenser circulating water drainage system. The design geometric lift of the circulating pump is effectively reduced, and the aeration tank is suitable for running under the working condition of more tide levels and achieving the standard discharge.
In order to accomplish the object of the present application, the present utility model adopts the following technical scheme:
the utility model relates to a floating water level seawater recovery system for seawater desulfurization, which comprises: the device comprises a circulating pump, a condenser, an aeration tank, an aeration fan, an aeration device, a desulfurization device, a seawater booster pump and a drainage ditch, wherein seawater in the sea is connected with an inlet of the condenser through the circulating pump, an outlet of the condenser is communicated with a front tank area of the aeration tank through a pipeline, an inlet of the desulfurization device is connected with an outlet pipeline of the condenser through the seawater booster pump, an outlet of the desulfurization device is communicated with the front tank area of the aeration tank through a pipeline, the aeration tank is sequentially divided into the front tank area, the aeration area and the drainage area by two weir plates, the aeration device is arranged in the aeration area, the aeration fan is connected with the aeration device through an air channel, air is fed into the aeration area, and a water outlet of the drainage area is discharged into the sea through the drainage ditch, wherein: the aeration fan is a variable frequency fan, the heights of the two weir plates are the same, and the elevation of the weir plates is the liquid level- (0.1-0.5) m of the low-tide-level drainage area, so that the water levels of the front pool area, the aeration area and the drainage area of the aeration tank are the same.
The utility model relates to a floating water level seawater recovery system for seawater desulfurization, wherein: and a siphon well is further arranged between the condenser and the aeration tank, an outlet of the condenser is communicated with the siphon well through a pipeline, an inlet of the desulfurization device is connected with an outlet pipeline of the siphon well through a seawater booster pump and a pipeline, and an outlet of the desulfurization device is communicated with a front tank area of the aeration tank.
The utility model relates to a floating water level seawater recovery system for seawater desulfurization, wherein: the aeration device is formed by arranging a plurality of aeration branch pipes which are connected in parallel on a bottom plate of the aeration tank along the inner wall of the aeration tank.
The utility model relates to a floating water level seawater recovery system for seawater desulfurization, wherein: the aeration branch pipe is made of FRP, PE or PP materials.
The floating water level seawater recovery system for seawater desulfurization has the following advantages:
1. and the overflow weir is canceled in the original siphon well of the project is improved, and the siphon well after the overflow weir is lost is changed into a drainage well with a simple structure. The liquid level in the drainage well follows the liquid level in the downstream aeration tank. The newly created project may consider the siphon well to be directly canceled.
2. The design elevation of the aeration tank is designed by taking the operation in a low tide level state as a principle, and the bottom elevation of the aeration tank is designed by taking the low tide level as a reference, and meanwhile, the condition of the highest tide level is required to be met.
3. The overflow weir is changed into a submerged weir design, and the level L3 in the aeration tank is kept equal to the level L4 of the drainage tank under the condition of low tide level, so that the water level difference between L3 and L4 is eliminated.
4. The aeration fan 5 adopts a variable frequency motor, and the control of the wind pressure and the wind quantity of the fan is realized by controlling the frequency of the motor, so that the wind pressure and the wind quantity of aeration wind can be controlled to adapt to the running condition of water level floating in an aeration tank.
The utility model has the following positive effects:
1. the system can effectively reduce the geometric lift of the circulating pump and reduce the power consumption, thereby reducing the power supply coal consumption. For a 1000MW unit, about 400kW of electricity consumption can be saved when 1m of lift is reduced; the 600MW unit can save about 270kW of electricity consumption when the lift is reduced by 1 m; the 300MW unit can save about 150kW of electricity consumption every 1m of lift.
2. The system aeration fan adopts the variable frequency motor, the operation frequency of the motor is adjusted according to the water level floating condition in the aeration tank and the actual demand of the aeration air quantity, the waste of fan power is reduced, the operation cost is saved, and the economic benefit of the project is improved.
3. The overflow weir in the siphon well is canceled, and the siphon well is changed into a simple drainage well, so that not only can the structure facilities be reduced, but also the hydraulic loss of the siphon well can be reduced, and the phenomenon that the liquid level of the conventional siphon well suddenly rises and overflows due to the sudden change of water flow when the circulating pump is started can be avoided.
Drawings
FIG. 1 is a floating water level seawater recovery system for desulfurizing seawater according to the present utility model;
fig. 2 is another floating level seawater recovery system for desulfurizing seawater according to the present utility model.
In fig. 1 to 2, reference numeral 1 denotes a circulation pump; reference numeral 2 is a condenser; reference numeral 3 denotes a siphon well; reference numeral 4 is an aeration tank; reference numeral 5 is an aeration fan; reference numeral 6 is an aeration device; reference numeral 7 is a forebay area; reference numeral 8 denotes an aeration zone; reference numeral 9 denotes a drainage area; reference numeral 10 is a weir plate; reference numeral 11 denotes a desulfurizing device; reference numeral 12 is a seawater booster pump; reference numeral 13 denotes a drain trench.
L1 is the liquid level of a siphon well, L2 is the liquid level of a front tank area of an aeration tank, L3 is the liquid level of an aeration area of the aeration tank, and L4 is the liquid level of a drainage area of the aeration tank.
Detailed Description
Example 1
As shown in fig. 1, the floating water level seawater recovery system for desulfurizing seawater of the present utility model comprises: the method comprises the steps of circulating pump 1, condenser 2, aeration tank 4, aeration fan 5, aeration device 6, desulfurization device 11, sea water booster pump 12 and drain ditch 13, sea water in the sea is connected with the inlet of condenser 2 through circulating pump 1, the outlet of condenser 2 is communicated with front tank area 7 of aeration tank 4 through pipeline, the inlet of desulfurization device 11 is connected with the outlet pipeline of condenser 2 through sea water booster pump 12, the outlet of desulfurization device 11 is communicated with front tank area 7 of aeration tank 4 through pipeline, aeration tank 4 is divided into front tank area 7, aeration area 8 and drain area 9 by two weir plates 10 in sequence, aeration device 6 is installed in aeration area 8, aeration device 6 is arranged on the bottom plate of aeration tank 4 along the inner wall of aeration tank, aeration pipe is made of FRP, PE or PP material, aeration fan 5 is connected with aeration device 6 through air duct, aeration fan 5 is a variable frequency fan, air is fed into aeration area 8, the water outlet of drain area 9 is discharged into the sea through ditch 13, and the elevation of weir plate 10 is low-level drain area- (0.1.5 m) so that the water level of front tank 8 is the same as that the water level of the front tank area 7 and the drain area 9 is the same.
Example 2
As shown in fig. 2, embodiment 2 is substantially the same as embodiment 1, and the same parts will not be described again, except that: a siphon well 3 is further arranged between the condenser 2 and the aeration tank 4, an outlet of the condenser 2 is communicated with the siphon well 3 through a pipeline, an inlet of the desulfurization device 11 is connected with an outlet pipeline of the siphon well 2 through a seawater booster pump 12 and a pipeline, and an outlet of the desulfurization device 11 is communicated with a front pool area 7 of the aeration tank 4.
As shown in fig. 1 and 2, the present utility model provides a floating water level seawater recovery system for desulfurizing seawater. Seawater is conveyed into a condenser 2 in a steam turbine room by a circulating pump 1 through a water taking pump room, enters a siphon well 3 after cooling the condenser 2 of a steam turbine or directly enters a desulfurization device 11, flows into a front pool area 7 of an aeration tank 4 through a pipeline, is mixed with seawater after sulfur dioxide is absorbed in the front pool area 7 of the aeration tank, flows into the aeration area 4 automatically, flows into an aeration tank drainage area 9 after aeration treatment, and is discharged into the open sea through a drainage ditch 13. No overflow weir is arranged in the siphon well 3, the liquid level in the siphon well 3 floats along with the outside sea tide level, the siphon action of the condenser 2 is fully utilized, and the lift of the circulating pump 1 is saved. The design elevation of the aeration tank 4 is based on the principle of ensuring stable operation in the low tide level state, and the design of the elevation of the bottom of the aeration tank 4 is based on the low tide level. The weir plate 10 of the aeration tank 4 is changed from an overflow weir to a submerged weir design, and in the operation process, the liquid level of the forehearth area 7, the liquid level of the aeration area 8 and the liquid level of the drainage area of the aeration tank 4 are ensured to be basically level under the condition of low tide level.
The aeration tank is divided into a front tank area 7, an aeration area 8 and a drainage area 9 from front to back according to the water flow direction, and the front tank area 7 receives circulating water from the condenser 2 to drain and seawater after absorbing sulfur dioxide, plays a role in mixing and also plays a role in a siphon well 3; the aeration zone 8 is provided with a weir plate 10 along the water flow direction, and an aeration device 6 is arranged below the water level; the drainage area 9 is connected with a drainage ditch 13, and plays a role in collecting the seawater after aeration in the aeration area 8.
An aeration device 6 is arranged in an aeration zone 8 of the aeration tank 4, and air is blown by an aeration fan 5 arranged near the aeration tank 4 to perform aeration treatment on seawater. The aeration fan 5 adopts a variable frequency motor, and the control of the wind pressure and the wind quantity of the fan is realized by controlling the frequency of the motor, so that the corresponding change of the wind pressure and the wind quantity of aeration wind can be controlled to adapt to the running condition of water level floating in the aeration tank 4. In order to adapt to the change of the water level in the aeration tank, a fan with fixed frequency and adjustable wind pressure can be adopted.
As shown in fig. 2, the water level of the floating water level seawater recovery system of the present utility model is operated with water level l1=l2=l3=l4=outside sea tide level. In order to be able to more clearly describe the effect of the tide level, the effect of the height difference due to the resistance of the building during hydraulic flow is neglected. When the outside sea tide level changes, the liquid level changes along with the change of the outside sea liquid level. In the system, no matter how the outside sea tide level changes, no height difference exists between liquid levels in the system, and no extra energy loss exists.
The geometric lift H=L1 of the water supply of the circulating pump 1 is the outside sea tide level, namely H=L1-L4=L3-L4. It can be seen that the choice of the level of the drainage area of the aeration tank 4, i.e. the choice of the design tide level, is of great importance.
Taking 1000MW unit engineering as an example, the liquid level L4=0.8m of the aeration tank drainage area at low tide level and the liquid level L4=5.01m of the aeration tank drainage area at high tide level. If the aeration zone 8 of the aeration tank 4 is designed to be at a fixed high tide level, when the open sea is in a low tide level working condition, the liquid level difference between the aeration zone 8 of the aeration tank 4 and the water drainage zone 9, namely L3-L4, is approximately 4.21m, and the height difference is overcome by the lift of the circulating pump 1.
As can be seen from the comparison, in the two cases, the geometric head of the circulating pump 1 is different by about 4.21m, and the direct current circulating water quantity of the 1000MW unit is about 120000m 3 The circulation pump per hour can save about 1690 kW.h of electric energy, the tidal range utilization rate is 50%, the station power consumption is calculated according to 0.35 yuan/kW.h, the annual operation hours of the unit are 6500h, and the operation cost can be saved about 192 ten thousand yuan/year.
The above examples are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the present utility model.
Claims (4)
1. A floating water level seawater recovery system for desulfurizing seawater, comprising: circulating pump (1), condenser (2), aeration tank (4), aeration fan (5), aeration equipment (6), desulphurization unit (11), sea water booster pump (12) and drainage ditch (13), sea water in the sea passes through circulating pump (1) and links to each other with the entry of condenser (2), the export of condenser (2) communicates with each other with forebay district (7) of aeration tank (4) through the pipeline, the entry of desulphurization unit (11) passes through sea water booster pump (12) and links to each other with the export pipeline of condenser (2), the export of desulphurization unit (11) communicates with each other with forebay district (7) of aeration tank (4) through the pipeline, aeration tank (4) are divided into forebay district (7) by two weir plates (10) in proper order, aeration district (8) and drainage district (9), be equipped with aeration equipment (6) in aeration area (8), aeration fan (5) pass through the wind channel and link to each other with aeration district (8), send into the air in, the delivery port of drainage district (9) is discharged into the sea through drainage ditch (13), its characterized in that: the aeration fan (5) is a variable frequency fan, the heights of the two weir plates (10) are the same, and the elevation of the weir plate (10) is the liquid level- (0.1-0.5) m of the low-tide drainage area, so that the water levels of the front pool area (7), the aeration area (8) and the drainage area (9) of the aeration tank (4) are the same.
2. The floating water level seawater recovery system for seawater desulfurization as claimed in claim 1, wherein: a siphon well (3) is further arranged between the condenser (2) and the aeration tank (4), an outlet of the condenser (2) is communicated with the siphon well (3) through a pipeline, an inlet of the desulfurization device (11) is connected with an outlet pipeline of the siphon well (3) through a seawater booster pump (12) and a pipeline, and an outlet of the desulfurization device (11) is communicated with a front pool area (7) of the aeration tank (4).
3. The floating water level seawater recovery system for seawater desulfurization as claimed in claim 2, wherein: the aeration device (6) is arranged on the bottom plate of the aeration tank (4) along the inner wall of the aeration tank by a plurality of aeration branch pipes which are connected in parallel.
4. A floating water level seawater recovery system for use in desulfurizing seawater as claimed in claim 3, wherein: the aeration branch pipe is made of FRP, PE or PP materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321944490.1U CN220432531U (en) | 2023-07-21 | 2023-07-21 | Floating water level seawater recovery system for seawater desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321944490.1U CN220432531U (en) | 2023-07-21 | 2023-07-21 | Floating water level seawater recovery system for seawater desulfurization |
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| Publication Number | Publication Date |
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| CN220432531U true CN220432531U (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321944490.1U Active CN220432531U (en) | 2023-07-21 | 2023-07-21 | Floating water level seawater recovery system for seawater desulfurization |
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| CN (1) | CN220432531U (en) |
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- 2023-07-21 CN CN202321944490.1U patent/CN220432531U/en active Active
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