CN103322828A - Shutdown protection device of direct air cooled condenser of thermal power plant - Google Patents
Shutdown protection device of direct air cooled condenser of thermal power plant Download PDFInfo
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- CN103322828A CN103322828A CN2013101939277A CN201310193927A CN103322828A CN 103322828 A CN103322828 A CN 103322828A CN 2013101939277 A CN2013101939277 A CN 2013101939277A CN 201310193927 A CN201310193927 A CN 201310193927A CN 103322828 A CN103322828 A CN 103322828A
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- steam exhaust
- cooled condenser
- air cooled
- direct air
- medicine
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Abstract
A shutdown protection device of a direct air cooled condenser of a thermal power plant comprises an agent box containing a furnace shutdown protection agent, wherein a heater is installed in the agent box, and the agent box 1 is connected with a steam exhaust main pipe of a steam exhaust device through a dosing pipeline and a control valve installed on the dosing pipeline or is connected with pressure measurement point sampling pipelines on two sides of steam exhaust pipes to achieve shutdown protection dosing operation of the air cooled condenser. Before the agent is added into the steam exhaust pipes, atomization treatment is further required to be performed through an atomizer to ensure the protection agent to be evenly distributed in the steam exhaust pipes. The official dosing pipeline is added on an outlet main pipe of the steam exhaust device or a pressure measurement point on each steam exhaust pipe serves as a temporary dosing pipeline. The protection agent can be added into the pipes by utilizing negative pressure of the outlet main pipe of the steam exhaust device without power. Atmospheric corrosion of the direct air cooled condenser during a shutdown period can be reduced or avoided, the water quality up-to-standard time during unit starting is shortened, the desalted water using amount is decreased, and the service life of the device is prolonged.
Description
Technical field
The present invention relates to a kind of Shut-down Protection device of air cooling tubes condenser, particularly the Shut-down Protection device of a kind of thermal power plant direct air cooled condenser.
Background technology
In the rich coal of northern China lack of water area, the Direct Air-Cooled fired power generating unit has superior water saving characteristic, therefore China in recent years newly-built Air-cooled Unit be Direct Air-cooled Unit mostly, the direct air cooled condenser heat-exchanging component uses carbon steel mostly, even because slight corrosion only takes place in de-activation procedure its huge heat exchange area, the absolute magnitude of its corrosion is also considerable.The Shut-down Protection of traditional heat power plant boiler is the feedwater medicine system adding protection of boiler during shutdown period medicament from boiler; inner surface in heat exchanger in the process of steam circulation forms layer protecting film; atmospheric corrosion during the prevention equipment out of use; though this method has the certain protection effect to air cooling tubes condenser; but because protection of boiler during shutdown period agent majority is organic matter; there is the effect of pyrolytic; when medicament process superheater; its active principle reduces greatly after the high temperature section such as reheater, and residual valid density has been not enough to the direct air cooled condenser of protecting area huge.Therefore, need to consider separately the dosing problem of direct air cooled condenser protection.
Summary of the invention
The object of the present invention is to provide the Shut-down Protection method of a kind of thermal power plant direct air cooled condenser, to overcome fired power generating unit protection of boiler during shutdown period dosing method commonly used be difficult to the to adequately protect shortcoming of direct air cooled condenser.
For achieving the above object; the technical solution used in the present invention is: comprise the medicine-chest that is built-in with the protection of boiler during shutdown period medicament; heater is installed in the medicine-chest; medicine-chest links to each other by dosing pipe and the female pipe of steam discharge that is installed in by-pass valve control and steam exhaust device on the dosing pipe; or link to each other with pressure-measuring-point sample lines on the gland steam exhauster of both sides, realize the Shut-down Protection feeding operations of air cooling tubes condenser.
Atomizer also is installed on the dosing pipe between described medicine-chest and the by-pass valve control.
Heater in the described medicine-chest is raised to 80-100 ℃ with the temperature of medicine.
The present invention exports female pipe at steam exhaust device and sets up the pressure-measuring-point that formally adds snack made with traditional Chinese medicines or utilize system (if there are two pressure-measuring-points in system; can use one of them; another normally uses, and does not influence unit operation) as add snack made with traditional Chinese medicines temporarily, add system's access point as the protection medicament.Utilize steam exhaust device to export the negative pressure of female pipe, need not power and directly add the protection of boiler during shutdown period medicament.Can alleviate or avoid the atmospheric corrosion of direct air cooled condenser between lay-off period, the water quality qualified time when reducing unit starting is saved the demineralized water consumption, strengthens the service life of equipment.
Used protection of boiler during shutdown period medicament, the working concentration of the present invention derive from patented technology " a kind of surface-active amine for the heat power plant boiler Shut-down Protection " (application number: 201110146499.3, publication No.: CN102296296A).
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1; the steam exhaust device 6 that the present invention includes low pressure (LP) cylinder 8 and be connected with low pressure (LP) cylinder 8; also comprise the medicine-chest 1 that is built-in with the protection of boiler during shutdown period medicament; medicine-chest 1 is communicated with by dosing pipe 2 and the female pipe 7 of steam discharge that is installed in by-pass valve control 4 and steam exhaust device 6 on the dosing pipe 2; and heater 3 is installed in medicine-chest 1; in order to guarantee that medicine is dispersed in the exhaust steam of steam turbine discharge; by heater the temperature of medicine in the medicine-chest 1 is heated to 80-100 ℃, on the dosing pipe 2 between described medicine-chest 1 and the by-pass valve control 4 atomizer 5 is installed also.After the atomizer atomizing, open the atomizer outlet valve, reconcile valve opening, guarantee that medicine added in 2～3 hours.Gland steam exhauster adds snack made with traditional Chinese medicines can be by installing the mode that formally adds snack made with traditional Chinese medicines, or utilize the mode of the pressure-measuring-point on the gland steam exhauster to realize temporarily.Pressure transmitter 9 is the measurement mechanisms that the pressure information of steam exhaust device are sent to the power plant centralized control center, and the present invention utilizes its measurement pipeline that medicine is joined in the system after pressure transmitter is removed.Because present most power plant do not add snack made with traditional Chinese medicines in this position design, therefore this mode is interim measure.
Claims (3)
1. the Shut-down Protection device of a thermal power plant direct air cooled condenser; it is characterized in that: comprise the medicine-chest (1) that is built-in with the protection of boiler during shutdown period medicament; heater (3) is installed in the medicine-chest (1); medicine-chest (1) links to each other by dosing pipe (2) and the female pipe of steam discharge (7) that is installed in by-pass valve control (4) and steam exhaust device (6) on the dosing pipe (2); or link to each other with pressure-measuring-point sample lines on the gland steam exhauster of both sides, realize the Shut-down Protection feeding operations of air cooling tubes condenser.
2. the Shut-down Protection device of thermal power plant according to claim 1 direct air cooled condenser is characterized in that: on the dosing pipe (2) between described medicine-chest (1) and the by-pass valve control (4) atomizer (5) is installed also.
3. the Shut-down Protection device of thermal power plant according to claim 1 direct air cooled condenser, it is characterized in that: the heater (3) in the described medicine-chest (1) is raised to 80-100 ℃ with the temperature of medicine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101939277A CN103322828A (en) | 2013-05-23 | 2013-05-23 | Shutdown protection device of direct air cooled condenser of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101939277A CN103322828A (en) | 2013-05-23 | 2013-05-23 | Shutdown protection device of direct air cooled condenser of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103322828A true CN103322828A (en) | 2013-09-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101939277A Pending CN103322828A (en) | 2013-05-23 | 2013-05-23 | Shutdown protection device of direct air cooled condenser of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103322828A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243197A (en) * | 2019-05-23 | 2019-09-17 | 华电电力科学研究院有限公司 | A kind of the medicament adding apparatus and adding method thereof of direct air cooled condenser operation corrosion control |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017060A (en) * | 2007-01-23 | 2007-08-15 | 西安利能科技有限责任公司 | Shutdown maintaining method for directly air cooling system |
| JP2008249275A (en) * | 2007-03-30 | 2008-10-16 | Aquas Corp | Injection method of water treatment agent |
| CN102288064A (en) * | 2011-06-17 | 2011-12-21 | 河北省电力建设调整试验所 | Protection method for joint stop of air cooling island and unit |
| CN202372021U (en) * | 2011-12-26 | 2012-08-08 | 西安热工研究院有限公司 | Energy-saving cooling device of direct air-cooling system |
-
2013
- 2013-05-23 CN CN2013101939277A patent/CN103322828A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017060A (en) * | 2007-01-23 | 2007-08-15 | 西安利能科技有限责任公司 | Shutdown maintaining method for directly air cooling system |
| JP2008249275A (en) * | 2007-03-30 | 2008-10-16 | Aquas Corp | Injection method of water treatment agent |
| CN102288064A (en) * | 2011-06-17 | 2011-12-21 | 河北省电力建设调整试验所 | Protection method for joint stop of air cooling island and unit |
| CN202372021U (en) * | 2011-12-26 | 2012-08-08 | 西安热工研究院有限公司 | Energy-saving cooling device of direct air-cooling system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243197A (en) * | 2019-05-23 | 2019-09-17 | 华电电力科学研究院有限公司 | A kind of the medicament adding apparatus and adding method thereof of direct air cooled condenser operation corrosion control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA HUANENG GROUP R + D CENTER Effective date: 20131104 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20131104 Address after: 710032 Xingqing Road, Shaanxi, China, No. 136, No. Applicant after: Xi'an Thermal Power Research Institute Co., Ltd. Applicant after: Huaneng Group Technology Innovation Center Address before: 710032 Xingqing Road, Shaanxi, China, No. 136, No. Applicant before: Xi'an Thermal Power Research Institute Co., Ltd. |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130925 |