CN212151744U - Automatic regulator for generator inner cooling water - Google Patents
Automatic regulator for generator inner cooling water Download PDFInfo
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- CN212151744U CN212151744U CN202020709127.1U CN202020709127U CN212151744U CN 212151744 U CN212151744 U CN 212151744U CN 202020709127 U CN202020709127 U CN 202020709127U CN 212151744 U CN212151744 U CN 212151744U
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Abstract
The utility model discloses an automatic cold water adjusting device in a generator, which respectively introduces ammonia water and demineralized water, controls an ammonia water electric switch valve and a demineralized water liquid level electric switch valve by collecting conductivity and liquid level signals inside an ammonia solution tank and ensures that the conductivity and the liquid level value in the ammonia solution tank reach a required interval; introducing an inner cooling water replenishing flow signal, and controlling a demineralized water replenishing flow electric regulating valve by using a PID control method through a PLC (programmable logic controller), so that the inner cooling water replenishing flow is ensured to reach a desired value; introducing an inner cooling water replenishing conductivity signal, calculating the required control frequency of the ammonia water metering pump by using a PID control method through a PLC, and controlling the ammonia water metering pump by using a frequency converter, so that the inner cooling water replenishing conductivity is ensured to reach a desired value, and the quality of the inner cooling water is automatically controlled.
Description
Technical Field
The utility model relates to a cold water treatment field especially relates to cold water automatic regulating apparatus in generator in the generator.
Background
The cooling water of the generator adopting the 'water-hydrogen' cooling mode has to be clean and pure. In order to slow down the corrosion of the winding copper bar, the pH value of the inner cooling water can be improved through control, the reliability of the conductivity signal is high, meanwhile, a conversion formula is arranged between the conductivity and the pH value of the inner cooling water, and the pH value is 8.57+ lgSC, so the corrosion of the winding copper bar can be effectively slowed down by controlling the conductivity of the inner cooling water.
At present, the pH value (or conductivity value) of internal cooling water is controlled by power plant, and basically, the method of adding alkalizer and small mixed bed treatment method are adopted. The method for adding the alkalizer is to artificially add the alkalizer, but the addition amount precision of the alkalizer is difficult to control, the internal cooling water pH cannot be maintained to be qualified when the addition amount is too small, and the conductivity of the internal cooling water seriously exceeds the standard when the addition amount is too large, so that the safe operation of a unit is threatened; in the small mixed bed method, the outlet water of the mixed bed is acidic, the pH value is generally lower than 7, the copper corrosion is very serious, resin needs to be frequently replaced, and the workload of operation and maintenance personnel is increased. In view of the above, there is a need for an automatic cooling water adjusting device for a generator.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a cold water automatic regulating device in generator, when the loss takes place in the running process of cold water, the stability of the pH (conductivity) of the continuous water supplement of the cold water is guaranteed, thereby the pH value of the cold water reaches stably in the realization.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the automatic cold water adjusting device in the generator comprises an ammonia solution tank 11, a demineralized water liquid level primary stop valve 1, a demineralized water liquid level electric switch valve 3, a demineralized water liquid level check valve 4 and a demineralized water liquid level secondary stop valve 5 which are sequentially arranged on a demineralized water pipeline communicated with the ammonia solution tank 11, and an ammonia water primary stop valve 6, an ammonia water electric switch valve 8, an ammonia water check valve 9 and an ammonia water secondary stop valve 10 which are sequentially arranged on an ammonia water pipeline communicated with the ammonia solution tank 11; the demineralized water liquid level check valve 4 and the ammonia water check valve 9 are used for preventing the ammonia water solution in the ammonia solution tank 11 from being back-filled into the pipeline; a liquid level meter 12 and an ammonia water conductivity sensor 13 provided in the ammonia solution tank 11; the bottom of the ammonia solution tank 11 is connected to an inner cooling water mixing tank 20 through a pipeline, an ammonia water metering pump 18 is arranged on the pipeline, an ammonia water metering pump inlet stop valve 17 and an ammonia water metering pump outlet stop valve 19 are respectively arranged on pipelines at an inlet and an outlet of the ammonia water metering pump 18, and the ammonia water metering pump 18 is connected with a frequency converter 25;
the demineralized water pipeline is connected to the inner-cooling water mixing tank 20 through a pipeline, and a demineralized water replenishing valve 14 and a demineralized water replenishing flow electric regulating valve 15 are arranged on the pipeline; an internal cold water replenishing conductivity sensor 21 provided on the internal cold water mixing tank 20; the inner-cooling water mixing tank 20 is connected to an inner-cooling water replenishing port through a pipeline, and an inner-cooling water replenishing flowmeter 22 and an inner-cooling water replenishing electric switch valve 24 are arranged on the pipeline; the PLC 26 is connected with a demineralized water liquid level electric switch valve 3, an ammonia water electric switch valve 8, a liquid level meter 12, an ammonia water conductivity sensor 13, a demineralized water replenishing flow electric regulating valve 15, an inner cooling water replenishing conductivity sensor 21, an inner cooling water replenishing flowmeter 22, an inner cooling water replenishing electric switch valve 24 and a frequency converter 25.
The PLC controller 26 is connected to a touch display 27.
The system also comprises a demineralized water liquid level electric switch valve 3, an ammonia water electric switch valve 8, a demineralized water replenishing flow electric control valve 15 and a demineralized water liquid level electric switch valve bypass valve 2 and an ammonia water electric switch valve bypass valve 7 which are respectively connected with the two ends of the internal cooling water replenishing electric switch valve 24 in parallel, wherein the demineralized water replenishing flow electric control valve bypass valve 16 and the internal cooling water replenishing electric switch valve bypass valve 23 are used for manually replenishing water to the internal cooling water when the demineralized water liquid level electric switch valve 3, the ammonia water electric switch valve 8, the demineralized water replenishing flow electric control valve 15 and the internal cooling water replenishing electric switch valve 24 are in failure.
The automatic internal cooling water adjusting device for the generator performs an automatic internal cooling water adjusting method, wherein a demineralized water liquid level primary stop valve 1, a demineralized water liquid level secondary stop valve 5, an ammonia water primary stop valve 6 and an ammonia water secondary stop valve 10 are opened, and a demineralized water liquid level electric switch valve bypass valve 2 and an ammonia water electric switch valve bypass valve 7 are closed; the touch display screen 27 is provided with an upper and a lower conductivity limit value and a lower liquid level limit value required by the ammonia solution tank 11, and the PLC controller 26 collects the conductivity of the ammonia water conductivity sensor 13 of the ammonia solution tank 11 and the liquid level signal of the liquid level meter 12. When the conductivity signal acquired by the ammonia water conductivity sensor 13 is lower than the conductivity lower limit value, the PLC 26 opens the ammonia water electric switch valve 8, and when the conductivity signal acquired by the ammonia water conductivity sensor 13 is higher than the conductivity upper limit value, the PLC 26 closes the ammonia water electric switch valve 8; when the liquid level signal that the level gauge 12 gathered is less than the liquid level lower limit value, PLC controller 26 opens demineralized water liquid level electric switch valve 3, when the liquid level signal that level gauge 12 gathered is higher than the liquid level upper limit value, PLC controller 26 closes demineralized water liquid level electric switch valve 3.
After the ammonia water solution in the ammonia solution tank 11 is ensured to have the expected conductivity and liquid level, the demineralized water replenishing stop valve 14, the ammonia water metering pump inlet stop valve 17 and the ammonia water metering pump outlet stop valve 19 are opened. An expected water replenishing flow value is set on the touch display screen 27, the PLC 26 collects a water replenishing flow signal through the internal cooling water replenishing flowmeter 22, PID calculation is carried out, the control opening degree required by the electric adjusting valve 15 for the water replenishing flow of the desalted water at the moment is obtained, and the flow stability of the internal cooling water is ensured; the expected value of the inner cooling water replenishing conductivity is set on the touch display screen 27, the PLC acquires the actual value of the inner cooling water replenishing conductivity through the inner cooling water replenishing conductivity sensor 21, PID calculation is carried out, the control frequency required by the ammonia water metering pump 18 is obtained, the required ammonia water amount is provided for the inner cooling water replenishing through controlling the frequency converter 25, the stability of the inner cooling water replenishing conductivity is ensured, and the stability of the inner cooling water pH value is realized.
Compared with the prior art, the utility model discloses possess following advantage:
the device and the method of the utility model are simple and practical and the control accuracy is high, and the conductivity value of the cooling water in the generator can be accurately and rapidly adjusted, thereby meeting the requirement of the pH value (conductivity value) of the cooling water. Compared with the existing internal cooling water purification system, the ammonia solution tank is added, the stability of the conductivity of the ammonia solution in the ammonia solution tank is guaranteed, a stable ammonia water source is provided for internal cooling water supplement, the flow and the conductivity of the internal cooling water supplement are controlled by using a PID algorithm, and the conductivity of the internal cooling water supplement is guaranteed to reach a desired value, namely the control requirement of the pH (conductivity) of the internal cooling water system of the generator is met.
Adopt the utility model discloses the device has not only solved the control problem of cold water system pH (conductivity) in the generator, has reduced operation personnel's work load moreover, has improved the security and the economic nature of generating set operation.
Drawings
Fig. 1 is a schematic view of the automatic cooling water adjusting device for a generator of the present invention.
Detailed Description
The following description will further describe the embodiments of the present invention with reference to fig. 1.
As shown in the attached figure 1, the utility model discloses a generator inner cooling water automatic regulating apparatus, including ammonia solution jar 11, demineralized water liquid level primary stop valve 1, demineralized water liquid level electric switch valve 3, demineralized water liquid level check valve 4 and demineralized water liquid level secondary stop valve 5 that set gradually on the demineralized water pipeline that communicates with ammonia solution jar 11, aqueous ammonia primary stop valve 6, aqueous ammonia electric switch valve 8, aqueous ammonia check valve 9 and aqueous ammonia secondary stop valve 10 that set gradually on the ammonia pipeline that communicates with ammonia solution jar 11; the demineralized water liquid level check valve 4 and the ammonia water check valve 9 are used for preventing the ammonia water solution in the ammonia solution tank 11 from being back-filled into the pipeline; a liquid level meter 12 and an ammonia water conductivity sensor 13 provided in the ammonia solution tank 11; the bottom of the ammonia solution tank 11 is connected to an inner cooling water mixing tank 20 through a pipeline, an ammonia water metering pump 18 is arranged on the pipeline, an ammonia water metering pump inlet stop valve 17 and an ammonia water metering pump outlet stop valve 19 are respectively arranged on pipelines at an inlet and an outlet of the ammonia water metering pump 18, and the ammonia water metering pump 18 is connected with a frequency converter 25; the demineralized water pipeline is connected to the inner-cooling water mixing tank 20 through a pipeline, and a demineralized water replenishing valve 14 and a demineralized water replenishing flow electric regulating valve 15 are arranged on the pipeline; an internal cold water replenishing conductivity sensor 21 provided on the internal cold water mixing tank 20; the inner-cooling water mixing tank 20 is connected to an inner-cooling water replenishing port through a pipeline, and an inner-cooling water replenishing flowmeter 22 and an inner-cooling water replenishing electric switch valve 24 are arranged on the pipeline; the PLC 26 is connected with a demineralized water liquid level electric switch valve 3, an ammonia water electric switch valve 8, a liquid level meter 12, an ammonia water conductivity sensor 13, a demineralized water replenishing flow electric regulating valve 15, an inner cooling water replenishing conductivity sensor 21, an inner cooling water replenishing flowmeter 22, an inner cooling water replenishing electric switch valve 24 and a frequency converter 25. The PLC controller 26 is connected to a touch display 27.
As the utility model discloses a prior implementation, still including parallelly connected at demineralized water liquid level electric switch valve 3 respectively, aqueous ammonia electric switch valve 8, demineralized water moisturizing flow electric control valve 15 and the demineralized water liquid level electric switch valve bypass valve 2 at interior cold water moisturizing electric switch valve 24 both ends, aqueous ammonia electric switch valve bypass valve 7, demineralized water moisturizing flow electric control valve bypass valve 16 and interior cold water moisturizing electric switch valve bypass valve 23 are used for when demineralized water liquid level electric switch valve 3, aqueous ammonia electric switch valve 8, demineralized water moisturizing flow electric control valve 15 and interior cold water moisturizing electric switch valve 24 break down, manual inside cold water moisturizing.
As shown in fig. 1, the automatic cooling water adjusting device for the generator of the present invention performs an automatic cooling water adjusting method by opening a demineralized water level primary stop valve 1, a demineralized water level secondary stop valve 5, an ammonia water primary stop valve 6, and an ammonia water secondary stop valve 10, and closing a demineralized water level electric switch valve bypass valve 2 and an ammonia water electric switch valve bypass valve 7; the touch display screen 27 is provided with an upper and a lower conductivity limit value and a lower liquid level limit value required by the ammonia solution tank 11, and the PLC controller 26 collects the conductivity of the ammonia water conductivity sensor 13 of the ammonia solution tank 11 and the liquid level signal of the liquid level meter 12. When the conductivity signal acquired by the ammonia water conductivity sensor 13 is lower than the conductivity lower limit value, the PLC 26 opens the ammonia water electric switch valve 8, and when the conductivity signal acquired by the ammonia water conductivity sensor 13 is higher than the conductivity upper limit value, the PLC 26 closes the ammonia water electric switch valve 8; when the liquid level signal that the level gauge 12 gathered is less than the liquid level lower limit value, PLC controller 26 opens demineralized water liquid level electric switch valve 3, when the liquid level signal that level gauge 12 gathered is higher than the liquid level upper limit value, PLC controller 26 closes demineralized water liquid level electric switch valve 3.
After the ammonia water solution in the ammonia solution tank 11 is ensured to have the expected conductivity and liquid level, the demineralized water replenishing stop valve 14, the ammonia water metering pump inlet stop valve 17 and the ammonia water metering pump outlet stop valve 19 are opened. An expected water replenishing flow value is set on the touch display screen 27, the PLC 26 collects a water replenishing flow signal through the internal cooling water replenishing flowmeter 22, PID calculation is carried out, the control opening degree required by the electric adjusting valve 15 for the water replenishing flow of the desalted water at the moment is obtained, and the flow stability of the internal cooling water is ensured; an expected value of the inner cooling water replenishing conductivity is set on the touch display screen 27, the PLC acquires an actual value of the inner cooling water replenishing conductivity through the inner cooling water replenishing conductivity sensor 21, PID calculation is carried out, the control frequency required by the ammonia water metering pump 18 is obtained, the required ammonia water amount is provided for the inner cooling water replenishing through controlling the frequency converter 25, the stability of the inner cooling water replenishing conductivity is ensured, and the control requirement of the pH (conductivity) of the inner cooling water system of the generator is met.
Claims (3)
1. The cold water automatic regulating apparatus in the generator, its characterized in that: the device comprises an ammonia solution tank (11), a desalted water liquid level primary stop valve (1), a desalted water liquid level electric switch valve (3), a desalted water liquid level check valve (4) and a desalted water liquid level secondary stop valve (5) which are sequentially arranged on a desalted water pipeline communicated with the ammonia solution tank (11), and an ammonia water primary stop valve (6), an ammonia water electric switch valve (8), an ammonia water check valve (9) and an ammonia water secondary stop valve (10) which are sequentially arranged on an ammonia water pipeline communicated with the ammonia solution tank (11); a liquid level meter (12) and an ammonia water conductivity sensor (13) which are arranged in the ammonia solution tank (11); the bottom of the ammonia solution tank (11) is connected to the inner cooling water mixing tank (20) through a pipeline, an ammonia water metering pump (18) is arranged on the pipeline, an ammonia water metering pump inlet stop valve (17) and an ammonia water metering pump outlet stop valve (19) are respectively arranged on pipelines at an inlet and an outlet of the ammonia water metering pump (18), and the ammonia water metering pump (18) is connected with a frequency converter (25);
the demineralized water pipeline is connected to the inner-cooling water mixing tank (20) through a pipeline, and a demineralized water replenishing valve (14) and a demineralized water replenishing flow electric regulating valve (15) are arranged on the pipeline; an inner cold water replenishing conductivity sensor (21) arranged on the inner cold water mixing tank (20); the inner-cooling water mixing tank (20) is connected to an inner-cooling water replenishing port through a pipeline, and an inner-cooling water replenishing flow meter (22) and an inner-cooling water replenishing electric switch valve (24) are arranged on the pipeline; the PLC (26) is connected with a demineralized water liquid level electric switch valve (3), an ammonia water electric switch valve (8), a liquid level meter (12), an ammonia water conductivity sensor (13), a demineralized water replenishing flow electric regulating valve (15), an inner cooling water replenishing conductivity sensor (21), an inner cooling water replenishing flow meter (22), an inner cooling water replenishing electric switch valve (24) and a frequency converter (25).
2. The automatic cooling water adjusting device for the generator as claimed in claim 1, wherein: the PLC (26) is connected with a touch display screen (27).
3. The automatic cooling water adjusting device for the generator as claimed in claim 1, wherein: the water supply device is characterized by further comprising a demineralized water liquid level electric switch valve (3), an ammonia water electric switch valve (8), a demineralized water supplement flow electric control valve (15) and a demineralized water liquid level electric switch valve bypass valve (2) and an ammonia water electric switch valve bypass valve (7) which are connected to two ends of the internal cooling water supplement electric switch valve (24) in parallel respectively, wherein the demineralized water supplement flow electric control valve bypass valve (16) and the internal cooling water supplement electric switch valve bypass valve (23) are used for manually supplementing water to the internal cooling water when the demineralized water liquid level electric switch valve (3), the ammonia water electric switch valve (8), the demineralized water supplement flow electric control valve (15) and the internal cooling water supplement electric switch valve (24) break down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020709127.1U CN212151744U (en) | 2020-05-01 | 2020-05-01 | Automatic regulator for generator inner cooling water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020709127.1U CN212151744U (en) | 2020-05-01 | 2020-05-01 | Automatic regulator for generator inner cooling water |
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| CN212151744U true CN212151744U (en) | 2020-12-15 |
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| CN202020709127.1U Active CN212151744U (en) | 2020-05-01 | 2020-05-01 | Automatic regulator for generator inner cooling water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860464A (en) * | 2021-10-13 | 2021-12-31 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | On-line adjusting device for PH value of generator cooling water |
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2020
- 2020-05-01 CN CN202020709127.1U patent/CN212151744U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860464A (en) * | 2021-10-13 | 2021-12-31 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | On-line adjusting device for PH value of generator cooling water |
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