CN212476300U - Forced flowing aeration tank of seawater desulfurization system - Google Patents
Forced flowing aeration tank of seawater desulfurization system Download PDFInfo
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- CN212476300U CN212476300U CN202021415972.4U CN202021415972U CN212476300U CN 212476300 U CN212476300 U CN 212476300U CN 202021415972 U CN202021415972 U CN 202021415972U CN 212476300 U CN212476300 U CN 212476300U
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- aeration tank
- seawater
- aeration
- desulfurization system
- forced flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model discloses a seawater desulfurization system aeration tank of forced flow, a serial communication port, including aeration tank (1), aeration tank (1) one end is aeration tank entry (4), and the other end is aeration tank export (5), aeration tank export (5) are equipped with adjustable manger plate weir (6), are equipped with agitator (2) and aeration pipe (3) in aeration tank (1). The utility model discloses a forced flow of agitator to but through the height-adjusting manger weir of installation aeration tank export, according to the liquid level height of operating condition real-time adjustment aeration tank, under the circumstances of guaranteeing unit safety and stability operation, further optimize circulating water system, play energy-conserving effect. In addition, the stirrer can disperse and blow air bubbles, reduce the size of the bubbles, improve the aeration efficiency of the seawater aeration tank and reduce the design size of the aeration tank.
Description
Technical Field
The utility model relates to a forced flowing aeration tank of a seawater desulfurization system, which belongs to the technical field of flue gas seawater desulfurization of coal-fired power plants.
Background
The seawater method for desulfurizing the flue gas of the coal-fired power plant is a flue gas desulfurization technology which is widely applied, has the advantages of simple system, convenient maintenance and low operating cost, and is widely suitable for the coal-fired power plants which take the seawater as unit cooling water in coastal areas at home and abroad.
The seawater flue gas desulfurization process is a desulfurization process for absorbing sulfur dioxide in flue gas by utilizing natural alkalinity of seawater, and comprises the following main process flows: a part of seawater is sent into an absorption tower to be contacted and mixed with the flue gas entering the absorption tower, and sulfur dioxide in the flue gas is absorbed to generate sulfite ions and hydrogen ions which are changed into acidic seawater; acid seawater is discharged into an aeration tank from the absorption tower, is mixed with a large amount of seawater which does not participate in the desulfurization reaction, and is blown with a large amount of air, so that unstable sulfite ions react with oxygen in the air to generate stable sulfate ions which are discharged into the sea along with the seawater, thereby achieving the aim of desulfurization. Meanwhile, a large amount of air blown into the aeration tank accelerates the generation and release of carbon dioxide, and the pH value and the dissolved oxygen amount of the seawater are recovered to the normal level of allowable discharge, and finally the seawater with qualified water quality is discharged back to the sea. Seawater desulfurization process a complete set of systems typically includes: a seawater supply system, a sulfur dioxide absorption system, a flue gas system, a seawater quality recovery system and the like.
The seawater used for seawater desulfurization is generally taken from unit cooling water drainage, and a seawater water supply and drainage system and a unit water supply and cooling system in the seawater desulfurization are an organic whole and are closely related. The power plant seawater desulfurization system usually utilizes the drainage of a unit cooling water system, after passing through a condenser, part of the unit cooling water drainage is pumped to an absorption tower by a pump to react with flue gas, the reacted acidic seawater is discharged to an aeration tank to be mixed with the rest unreacted cooling water drainage and aerated, and the recovered water quality is discharged to the sea. The main influence of the seawater desulfurization system on the design of the circulating water system of the power plant is the influence on the design water level of the circulating water, namely, a seawater desulfurization aeration tank and an aeration tank drainage weir are added at the drainage end of the circulating water system, so that the siphon utilization height of a unit is reduced, the lift of a circulating water pump is increased, and the investment and the operating cost of the circulating water system are increased.
The design of the seawater desulfurization system is considered, the output of the aeration fan can change along with the water level of the aeration tank, and the output of the aeration fan is correspondingly improved along with the rising of the water level of the aeration tank. Therefore, in order to obtain a stable aeration tank water level and avoid the influence of the open sea tide level, the aeration tank drainage weir should be designed at a higher tide level in consideration of the seawater desulfurization system. But considering from whole circulating water system, when improving aeration tank weir top elevation, also harmony has heightened siphon well water level, just so causes the unit siphon to utilize height to reduce, and circulating water pump lift improves, has increased circulating water system's investment and working costs.
Disclosure of Invention
An object of the utility model is to provide a seawater desulfurization system aeration tank of forced flow reaches optimization circulating water system, improves the unit siphon and utilizes the height, reduces circulating water pump lift, reduces circulating water system and aeration fan working costs's purpose.
In order to solve the technical problem, the utility model discloses a following technical scheme: the aeration tank of the forced flowing seawater desulfurization system is characterized by comprising an aeration tank, wherein one end of the aeration tank is an inlet of the aeration tank, the other end of the aeration tank is an outlet of the aeration tank, the outlet of the aeration tank is provided with an adjustable water retaining weir, and a stirrer and an aeration pipe are arranged in the aeration tank.
In the aeration tank of the forced-flow seawater desulfurization system, the adjustable water-retaining weir structure is a shutter type baffle door or a inserting plate type baffle door.
In the aeration tank of the forced-flow seawater desulfurization system, the stirrer is arranged in an inclined manner, and the inclination angle is 0-90 degrees.
In the aeration tank of the forced-flow seawater desulfurization system, the stirrer is arranged in an inclined manner, and the inclination angle is 20-60 degrees.
In the aeration tank of the forced flowing seawater desulfurization system, the inlet of the aeration tank is arranged in the seawater siphon well, and the side surface of the seawater siphon well is provided with the seawater inlet baffle door.
In the forced-flow aeration tank of the seawater desulfurization system, a water collector is arranged in the aeration tank, and the water collector is connected with a circulating pump of a desulfurization tower.
Compared with the prior art, the utility model cancels the water retaining weir of the circulating water pump of the desulfurization system by the forced flow of the stirrer, and reduces the lift of the circulating water pump; the forced flow of the stirring system prevents the acidic seawater returned by the desulfurizing tower from being back-mixed to the inlet of the circulating water pump of the desulfurizing tower, so that the desulfurizing efficiency of the desulfurizing tower is ensured; the water retaining weir with adjustable height at the outlet of the aeration tank is installed, the liquid level height of the aeration tank is adjusted in real time according to the operation condition, and the energy consumption of a circulating water system is further optimized under the condition of ensuring the safe and stable operation of a unit, so that the energy-saving effect is achieved; the agitator and the aeration pipe cooperate to further disperse the bubbles of the air blown in, reduce the size of the bubbles and prolong the retention time of the air, thereby improving the aeration efficiency of the seawater aeration tank and reducing the design size of the aeration tank.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The following description is given with reference to the accompanying drawings and the detailed description, but not to limit the present invention.
Detailed Description
The embodiment of the utility model provides a: forced flowing's seawater desulfurization system aeration tank, including aeration tank 1, aeration tank 1 one end is aeration tank entry 4, and the other end is aeration tank export 5, aeration tank export 5 is equipped with adjustable manger plate weir 6, is equipped with agitator 2 and aeration pipe 3 in aeration tank 1.
The adjustable water retaining weir 6 can be adjusted in height and used for adjusting water level, and the structure can be a shutter type baffle door or a flashboard type baffle door. The shutter type baffle door has the working principle that a plurality of rotatable blades are horizontally arranged in a water retaining weir door frame, rotating shafts are arranged at the two transverse ends of each blade, and the blades are rotatably connected with the door frame by the rotating shafts. The height of the water-retaining weir is adjusted by adjusting the number of the horizontal rotating blades. Set up the elasticity gasket on the composition surface of two adjacent blades, the vertical both sides at the blade are installed to the stiff end of this elasticity gasket, and the expansion end of gasket outwards extends one section length along the plane of blade, and when two adjacent blades were in the closure state, the expansion end of the elasticity gasket on one of them blade was taken on another blade. The blades of the louvered closing flapper door may be made of alloy steel or plain carbon steel and are firmly attached to the stub shaft. Each blade and shank assembly is supported by two externally mounted flanged bearings.
The working principle of the inserting plate type baffle door is that a liftable baffle door is vertically arranged in a water retaining weir door frame, slide rails are arranged at the vertical two ends of the baffle door frame, and the height of the water retaining weir is adjusted through the height of the liftable baffle door. When the liquid level is highest, the baffle door is completely lifted to block seawater; when the seawater liquid level is lower, the baffle door is lowered, and the liquid level height is reduced.
The stirrer 2 is obliquely arranged, and the inclination angle is 0-90 degrees. Preferably, the angle of inclination is 20-60 degrees. The stirrer 1 can dispersedly blow air bubbles, reduce the size of the bubbles and improve the aeration efficiency of the seawater aeration tank.
The aeration tank inlet 4 is arranged in a seawater siphon well 7, and a seawater inlet baffle door 8 is arranged on the side surface of the seawater siphon well 7.
A water collector 9 is arranged in the aeration tank 1, and the water collector 9 is connected with a circulating pump 10 of the desulfurizing tower.
The working principle is as follows: after seawater enters the aeration tank 1 through the seawater siphon well 7, a part of seawater is pumped to the absorption tower by the circulating pump 10 of the desulfurizing tower after passing through the water collector 9 arranged in the aeration tank 1 to react with the flue gas, and the installation direction of the water collector 9 is opposite to the flowing direction of the seawater; a part of seawater continues to flow along the aeration tank 1 and is mixed with the reacted acidic seawater; the mixed seawater continues to flow towards the adjustable-height water-retaining weir 6 at the outlet 5 of the aeration tank by means of the power provided by the stirrer 2 installed on the aeration tank 1.
When the seawater is high in liquid level, in order to avoid mixing the seawater outside the height-adjustable water retaining weir 6 with the seawater in the aeration tank, the height of the water retaining weir needs to be correspondingly increased according to the seawater liquid level; when the seawater level is reduced, the height of the water retaining weir 6 with adjustable height can be correspondingly reduced in order to save the lift of the circulating water pump and reduce the power consumption of the water pump.
Claims (6)
1. The aeration tank of the forced flowing seawater desulfurization system is characterized by comprising an aeration tank (1), wherein one end of the aeration tank (1) is an aeration tank inlet (4), the other end of the aeration tank (1) is an aeration tank outlet (5), the aeration tank outlet (5) is provided with an adjustable water retaining weir (6), and a stirrer (2) and an aeration pipe (3) are arranged in the aeration tank (1).
2. The aeration tank of the forced flow seawater desulfurization system as defined in claim 1, wherein the adjustable water dam (6) is constructed as a shutter type baffle or a plate-inserted type baffle door.
3. A forced flow aeration tank of a seawater desulfurization system in accordance with claim 2, wherein the agitator (2) is disposed at an inclination of 0 to 90 degrees.
4. A forced flow aeration tank of a seawater desulfurization system in accordance with claim 1, wherein the agitator (2) is disposed at an inclination of 20 to 60 degrees.
5. The aeration tank of the forced flow seawater desulfurization system according to claim 1, wherein the aeration tank inlet (4) is arranged in a seawater siphon well (7), and a seawater inlet baffle door (8) is arranged on the side surface of the seawater siphon well (7).
6. A forced flow aeration tank of a seawater desulfurization system according to claim 1, wherein a water collector (9) is arranged in the aeration tank (1), and the water collector (9) is connected with a desulfurization tower circulating pump (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021415972.4U CN212476300U (en) | 2020-07-17 | 2020-07-17 | Forced flowing aeration tank of seawater desulfurization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021415972.4U CN212476300U (en) | 2020-07-17 | 2020-07-17 | Forced flowing aeration tank of seawater desulfurization system |
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| CN212476300U true CN212476300U (en) | 2021-02-05 |
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| CN202021415972.4U Active CN212476300U (en) | 2020-07-17 | 2020-07-17 | Forced flowing aeration tank of seawater desulfurization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718018A (en) * | 2020-07-17 | 2020-09-29 | 中国华电科工集团有限公司 | Forced flowing aeration tank of seawater desulfurization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718018A (en) * | 2020-07-17 | 2020-09-29 | 中国华电科工集团有限公司 | Forced flowing aeration tank of seawater desulfurization system |
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