CN113124692A - Direct air cooling method - Google Patents
Direct air cooling method Download PDFInfo
- Publication number
- CN113124692A CN113124692A CN201911394710.6A CN201911394710A CN113124692A CN 113124692 A CN113124692 A CN 113124692A CN 201911394710 A CN201911394710 A CN 201911394710A CN 113124692 A CN113124692 A CN 113124692A
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- Prior art keywords
- cooling
- air
- air cooling
- steam
- pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
Abstract
The invention discloses a direct air cooling method, which comprises the following steps: s1: conveying the exhaust steam; the exhaust steam exhausted by the steam turbine enters the air cooling pipe bundle through the steam exhaust pipe; s2: air cooling; the cooling fans on the two sides forcibly blow air to form air convection, and the air flows outside the air cooling tube bundle; s3: the steam is condensed into water in the air cooling tube bundle, and the condensed water is led out from the drain pipe; s4: discharging residual gas in the S3 through a vacuum pump through a vacuum pumping pipeline; s5: and the condensed water guided out by the drain pipe is collected in a condensed water collecting box and then conveyed to the boiler for recycling. The invention adopts the low-speed permanent magnet motor to replace a variable frequency motor and a speed reducer, improves the operating efficiency of the direct air cooling system, ensures that the direct air cooling unit obtains good economic benefit, simultaneously utilizes two cooling fans to form air convection, accelerates the cooling speed, and the air cooling pipe bundle in a clearance spiral shape can be contacted with convection air in a larger area, thereby further improving the efficiency of steam cooling to form water.
Description
Technical Field
The invention relates to the technical field of direct air cooling, in particular to a direct air cooling method.
Background
The adoption of air cooling technology is a new technology which is gradually developed in the power generation industry in recent years for saving the water consumption of thermal power plants. The air cooling technology of the power station becomes an effective way for building thermal power to save water in areas with serious water resource shortage and pithead areas. The invention relates to an air cooling system for cooling the tail end of a unit of a thermal power plant, which mainly comprises a direct air cooling system and an indirect air cooling system.
The direct air cooling system has the working principle that dead steam exhausted by the steam turbine enters the downstream pipe bundle through the steam exhaust pipeline and the steam distribution pipe. The axial flow fan blows air forcibly, and air flows outside the air cooling tube bundle. The steam is condensed into water in the air-cooled tube bundle. The uncondensed gas is discharged from the vacuum-pumping pipeline through a vacuum pump. The condensed water is collected to the condensed water collecting box and returns to the boiler through the condensed water outlet, so that the cyclic utilization is realized.
However, the existing air cooling method has some defects: 1. most of the existing fans are driven by variable frequency motors and speed reducers, and the running efficiency is low; 2. the cooling effect of the existing air cooling is not good enough, and the steam can not be rapidly condensed into water.
For this purpose, a direct air cooling method is proposed.
Disclosure of Invention
The invention aims to provide a direct air cooling method, which adopts a low-speed permanent magnet motor to replace a variable frequency motor and a speed reducer, is directly connected with a fan to drive a load, simplifies a transmission chain, and has no speed reducer connected in the middle, thereby improving the operation efficiency of a direct air cooling system, leading a direct air cooling unit to obtain good economic benefit, simultaneously utilizing two cooling fans to form air convection to accelerate the cooling speed, leading an air cooling pipe bundle with a clearance spiral shape to be capable of contacting with convection air in a larger area, and further improving the efficiency of steam cooling to form water, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a direct air cooling method comprises the following steps:
s1: conveying the exhaust steam; the exhaust steam exhausted by the steam turbine enters the air cooling pipe bundle through the steam exhaust pipe;
s2: air cooling; the cooling fans on the two sides forcibly blow air to form air convection, the air flows outside the air cooling tube bundle, and the blown air cooling tube bundle is in a spiral shape with gaps, wherein the cooling fans are driven by a low-speed permanent magnet motor;
s3: the steam is condensed into water in the air cooling tube bundle, and the condensed water is led out from the drain pipe;
s4: discharging residual gas in the S3 through a vacuum pump through a vacuum pumping pipeline;
s5: and the condensed water guided out by the drain pipe is collected in a condensed water collecting box and then conveyed to the boiler for recycling.
The utility model provides a direct air cooling system, includes the workstation, the upper end external surface fixedly connected with cooling bin of workstation, and the front end external surface fixedly connected with steam extraction pipe in cooling bin, the equal fixedly connected with cooling blower in both sides surface in cooling bin, and the position that one side in cooling bin is close to the rear end is provided with the vacuum pump, fixedly connected with evacuation pipeline between vacuum pump and the cooling bin, the place ahead of workstation is provided with the comdenstion water collecting box, the one end fixed connection air cooling tube bank of steam extraction pipe.
Preferably, the air cooling tube bundle is positioned inside the cooling bin and is positioned in the middle of the two cooling fans.
Preferably, the steam exhaust pipe is communicated with the air cooling pipe bundle after penetrating through the cooling bin, and an opening at one end of the air cooling pipe bundle is positioned inside the cooling bin.
Preferably, the vacuumizing pipeline is communicated with the cooling bin.
Preferably, a drain pipe is fixedly connected between the condensed water collecting box and the cooling bin, and an opening at one end of the drain pipe is arranged at the bottom of the cooling bin.
Preferably, the outer surface of the front end of the condensed water collecting box is fixedly connected with a water conveying pipe, and one end of the water conveying pipe is connected with the external boiler water.
Preferably, the cooling fan is driven by a low-speed permanent magnet motor.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the low-speed permanent magnet motor to replace a variable frequency motor and a speed reducer, and is directly connected with the fan to drive the load, thereby simplifying the transmission chain, having no speed reducer connection in the middle, and the improved system has the following advantages because the speed reducer is cancelled: (1) an intermediate link is omitted, the transmission is simple, and the reliability is greatly improved; (2) the vibration is lower, and the noise is lower; (3) higher efficiency and power factor; (4) the operation and maintenance cost is reduced; (5) liquid oil is not needed, and the field cleaning and pollution-free are realized; thereby improving the operation efficiency of the direct air cooling system and leading the direct air cooling unit to obtain good economic benefit;
2. the invention uses two cooling fans to form air convection to accelerate cooling speed, and the air cooling tube bundle with clearance spiral shape can contact with convection air in a larger area, thereby further improving the efficiency of steam cooling to form water.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a block diagram of the system of the present invention;
fig. 3 is a view of the air-cooled tube bundle and the cooling fan of the present invention.
In the figure: 1. a work table; 2. a cooling bin; 3. a steam exhaust pipe; 4. a cooling fan; 5. a vacuum pump; 6. a vacuum pipeline is pumped; 7. a condensed water collecting box; 8. and (5) air-cooling the tube bundle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
a direct air cooling method comprises the following steps:
s1: conveying the exhaust steam; the exhaust steam exhausted by the steam turbine enters an air cooling tube bundle 8 through a steam exhaust pipe 3;
s2: air cooling; the cooling fans 4 on the two sides are used for forcibly blowing air to form air convection, the air flows outside the air cooling tube bundle 8, the air-blown air cooling tube bundle 8 is in a spiral shape with gaps, and the cooling fans 4 are driven by a low-speed permanent magnet motor;
s3: the steam is condensed into water in the air cooling tube bundle 8, and the condensed water is led out from the drain pipe;
s4: the residual gas in the S3 is exhausted from the vacuumizing pipeline 6 through the vacuum pump 5;
s5: and the condensed water led out by the drain pipe is collected in a condensed water collecting box 7 and then is conveyed to the boiler for recycling.
Referring to fig. 2 and 3, a direct air cooling system includes a workbench 1, a cooling bin 2 is fixedly connected to an upper outer surface of the workbench 1, a steam exhaust pipe 3 is fixedly connected to a front outer surface of the cooling bin 2, cooling fans 4 are fixedly connected to two outer surfaces of the cooling bin 2, a vacuum pump 5 is disposed at a position close to a rear end of one side of the cooling bin 2, a vacuum pumping pipeline 6 is fixedly connected between the vacuum pump 5 and the cooling bin 2, a condensed water collecting box 7 is disposed in front of the workbench 1, and one end of the steam exhaust pipe 3 is fixedly connected to an air cooling pipe bundle 8.
Adopt low-speed permanent-magnet machine to replace inverter motor and speed reducer, directly link the drive load with cooling blower 4, simplify the driving chain, the middle no speed reducer is connected to improve the operating efficiency of direct air cooling system, make direct air cooling unit obtain good economic benefits, simultaneously, utilize two cooling blower 4 to form the air convection simultaneously, accelerate cooling rate, and the air cooling tube bank 8 that is gapped heliciform can be bigger area-wise with the contact of convection air, further improve the efficiency that steam cooling becomes water.
Specifically, as shown in fig. 2 and 3, the air cooling tube bundle 8 is located inside the cooling bin 2 and in the middle of the two cooling fans 4, and the device facilitates strong air convection.
Specifically, as shown in fig. 2 and 3, the steam exhaust pipe 3 penetrates through the cooling bin 2 and then is communicated with the air cooling pipe bundle 8, an opening at one end of the air cooling pipe bundle 8 is located inside the cooling bin 2, and the arrangement facilitates the residual gas extraction by the vacuum pump 5.
Specifically, as shown in fig. 2 and 3, the vacuum-pumping pipeline 6 is communicated with the cooling bin 2, and the arrangement ensures smooth extraction of residual gas.
Specifically, as shown in fig. 2 and 3, a drain pipe is fixedly connected between the condensed water collection box 7 and the cooling bin 2, and an opening at one end of the drain pipe is arranged at the bottom of the cooling bin 2, so that condensed water can be conveniently recovered.
Specifically, as shown in fig. 2 and 3, a water delivery pipe is fixedly connected to the outer surface of the front end of the condensed water collection box 7, one end of the water delivery pipe is connected to the external boiler water, and the arrangement facilitates recycling of water resources.
Specifically, as shown in fig. 2 and 3, the cooling fan 4 is driven by a low-speed permanent magnet motor, and this arrangement can improve economic efficiency.
The working principle is as follows: during the use, at first, steam turbine exhaust steam gets into air cooling tube bank 8 through exhaust pipe 3, at this moment, the cooling fan 4 operation of air cooling tube bank 8 both sides is bloied, the wind that relative cooling fan 4 that sets up blew out forms powerful air convection, it can effectively be into water with the steam cooling in the exhaust steam to cooperate the air cooling tube bank 8 that is gapped heliciform again, then, the cooling water flows down in cooling storehouse 2 bottoms from 8 opening parts of air cooling tube bank, the boiler recycle is carried to condensate water collecting box 7 after the hydrophobic pipe of rethread is derived, finally, the remaining unable gas that condenses passes through 8 opening discharges of air cooling tube bank in cooling storehouse 2, start vacuum pump 5 this moment, it can to take out the residual gas in cooling storehouse 2 through evacuation pipeline 6.
The invention adopts the low-speed permanent magnet motor to replace a variable frequency motor and a speed reducer, and is directly connected with the cooling fan 4 to drive the load, thereby simplifying the transmission chain, having no speed reducer connection in the middle, and the improved system has the following advantages because the speed reducer is cancelled: (1) an intermediate link is omitted, the transmission is simple, and the reliability is greatly improved; (2) the vibration is lower, and the noise is lower; (3) higher efficiency and power factor; (4) the operation and maintenance cost is reduced; (5) liquid oil is not needed, and the field cleaning and pollution-free are realized; thereby improving the operation efficiency of the direct air cooling system and leading the direct air cooling unit to obtain good economic benefit; meanwhile, air convection is formed by the two cooling fans 4, the cooling speed is accelerated, the air cooling tube bundle 8 with the spiral gaps can be in contact with convection air in a larger area, and the efficiency of steam cooling to form water is further improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A direct air cooling method is characterized by comprising the following steps:
s1: conveying the exhaust steam; the exhaust steam exhausted by the steam turbine enters the air cooling pipe bundle through the steam exhaust pipe (3);
s2: air cooling; the cooling fans (4) on the two sides are used for forcibly blowing to form air convection, air flows outside the air cooling tube bundle (8), the blown air cooling tube bundle (8) is in a spiral shape with gaps, and the cooling fans (4) are driven by a low-speed permanent magnet motor;
s3: the steam is condensed into water in the air cooling tube bundle (8), and the condensed water is led out from the drain pipe;
s4: residual gas in the S3 is exhausted from the vacuumizing pipeline (6) through the vacuum pump (5);
s5: and the condensed water led out by the drain pipe is collected in a condensed water collecting box (7) and then conveyed to the boiler for recycling.
2. A direct air cooling system for carrying out the method of claim 1, wherein: including workstation (1), the upper end external surface fixedly connected with cooling bin (2) of workstation (1), and the front end external surface fixedly connected with steam extraction pipe (3) of cooling bin (2), the equal fixedly connected with cooling blower (4) of both sides external surface of cooling bin (2), and the position that one side of cooling bin (2) is close to the rear end is provided with vacuum pump (5), fixedly connected with evacuation pipeline (6) between vacuum pump (5) and cooling bin (2), the place ahead of workstation (1) is provided with comdenstion water collecting box (7), the one end fixed connection air cooling tube bank (8) of steam extraction pipe (3).
3. A direct air-cooling system according to claim 2, characterized in that: the air cooling tube bundle (8) is positioned inside the cooling bin (2) and is arranged in the middle of the two cooling fans (4).
4. A direct air-cooling system according to claim 2, characterized in that: the steam exhaust pipe (3) is communicated with the air cooling pipe bundle (8) after penetrating through the cooling bin (2), and an opening at one end of the air cooling pipe bundle (8) is positioned inside the cooling bin (2).
5. A direct air-cooling system according to claim 2, characterized in that: the vacuum-pumping pipeline (6) is communicated with the cooling bin (2).
6. A direct air-cooling system according to claim 2, characterized in that: a drain pipe is fixedly connected between the condensed water collecting box (7) and the cooling bin (2), and an opening at one end of the drain pipe is arranged at the bottom of the cooling bin (2).
7. A direct air-cooling system according to claim 2, characterized in that: the outer surface of the front end of the condensed water collecting box (7) is fixedly connected with a water conveying pipe, and one end of the water conveying pipe is connected with an external boiler water consumption position.
8. A direct air-cooling system according to claim 2, characterized in that: and the cooling fan (4) is driven by a low-speed permanent magnet motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911394710.6A CN113124692A (en) | 2019-12-30 | 2019-12-30 | Direct air cooling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911394710.6A CN113124692A (en) | 2019-12-30 | 2019-12-30 | Direct air cooling method |
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| Publication Number | Publication Date |
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| CN113124692A true CN113124692A (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911394710.6A Pending CN113124692A (en) | 2019-12-30 | 2019-12-30 | Direct air cooling method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810565U (en) * | 2010-09-13 | 2011-04-27 | 哈尔滨空调股份有限公司 | Air-cooled direct-driving type large-diameter axial-flow fan device of power station |
| CN204255122U (en) * | 2014-10-23 | 2015-04-08 | 梅州客都物业管理有限公司 | A kind of highly effective air condenser |
| CN207064291U (en) * | 2017-08-18 | 2018-03-02 | 大连电机集团有限公司 | A kind of improved structure for power plant Air-Cooling Island Fan Cooling System |
| CN109412341A (en) * | 2018-11-02 | 2019-03-01 | 南京林业大学 | A kind of rotor vacuumizes cooling high-speed permanent magnet motor system |
| CN109908713A (en) * | 2019-04-03 | 2019-06-21 | 上海妍杰环境设备有限公司 | Flue gas dehumidification treatments system |
-
2019
- 2019-12-30 CN CN201911394710.6A patent/CN113124692A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810565U (en) * | 2010-09-13 | 2011-04-27 | 哈尔滨空调股份有限公司 | Air-cooled direct-driving type large-diameter axial-flow fan device of power station |
| CN204255122U (en) * | 2014-10-23 | 2015-04-08 | 梅州客都物业管理有限公司 | A kind of highly effective air condenser |
| CN207064291U (en) * | 2017-08-18 | 2018-03-02 | 大连电机集团有限公司 | A kind of improved structure for power plant Air-Cooling Island Fan Cooling System |
| CN109412341A (en) * | 2018-11-02 | 2019-03-01 | 南京林业大学 | A kind of rotor vacuumizes cooling high-speed permanent magnet motor system |
| CN109908713A (en) * | 2019-04-03 | 2019-06-21 | 上海妍杰环境设备有限公司 | Flue gas dehumidification treatments system |
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Application publication date: 20210716 |
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| RJ01 | Rejection of invention patent application after publication |