Method for adjusting the quality of generator stator cooling water

Abstract

The present invention relates to the technical field of cooling water quality preparation devices, and is a generator stator cooling water quality preparation device; it includes a stator cooling water tank and an ion exchanger mixed bed; a first water supply pipe is fixedly connected between the first water supply end of the stator cooling water tank and the water inlet end of the ion exchanger mixed bed, a liquid outlet pipe is fixedly connected between the water outlet end of the ion exchanger mixed bed and the overflow pipe, a water outlet pipe is fixedly connected to the water outlet end of the stator cooling water tank, and a first connecting pipe is fixedly connected between the water outlet pipe and the first water supply pipe. The present invention has a reasonable and compact structure and is easy to use. By mixing high-conductivity condensate with low-conductivity condensate supply water, and then replenishing it into the stator cooling water tank after the conductivity is qualified, the problem of excessive conductivity of stator cooling water caused by difficult control of conductivity is completely solved. It has the characteristics of safety and reliability, is convenient for operation, improves work efficiency, reduces production costs, and eliminates safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of cooling water quality adjustment devices, in particular to a method for adjusting the quality of cooling water for a generator stator. Background Art

[0002] The make-up water for the generator stator cooling water is demineralized water. During operation, the stator cooling water is purified by an ion exchanger to make the quality of the stator cooling water and the demineralized water basically the same. The conductivity of the stator cooling water is less than 0.2μS / cm, the pH value is within the range of 7.0±0.2, and the dissolved oxygen content is much greater than 30μg / L. Since the ion exchanger mixed bed removes the corrosion products of copper in the stator cooling water, it covers up the prominent corrosion problems. In order to ensure the service life of the generator, the water quality must be treated in accordance with standard requirements.

[0003] Many domestic companies have launched different types of cold water alkalization devices, but the equipment purchase costs and daily maintenance costs are generally high. Summary of the invention

[0004] The present invention provides a method for adjusting the water quality of generator stator cooling water, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of unstable conductivity, high production cost and potential safety hazards in the existing stator cooling water alkalization device.

[0005] The technical solution of the present invention is achieved through the following measures: a method for adjusting the water quality of generator stator cooling water, comprising a stator cooling water tank and an ion exchanger mixed bed; a first water replenishment end and an overflow end are respectively provided at the upper part of the stator cooling water tank, the overflow end is located higher than the first water replenishment end, an overflow pipe is fixedly connected to the overflow end of the stator cooling water tank, a first water replenishment pipe is fixedly connected between the first water replenishment end of the stator cooling water tank and the water inlet end of the ion exchanger mixed bed, a liquid outlet pipe is fixedly connected between the water outlet end of the ion exchanger mixed bed and the overflow pipe, a water outlet end is provided at the bottom of the stator cooling water tank, a water outlet pipe is fixedly connected to the water outlet end of the stator cooling water tank, a first connecting pipe is fixedly connected between the water outlet pipe and the first water replenishment pipe, a second water replenishment end and a third water replenishment end are respectively provided at the lower part of the stator cooling water tank, a second water replenishment pipe is fixedly connected between the liquid outlet pipe and the second water replenishment end of the stator cooling water tank, A bypass pipe is connected in parallel to the lower part of the second water supply pipe, and a conductivity detection device is fixedly installed on the bypass pipe. A condensate jellyfish pipe inlet pipe is arranged on the outer side of the cold water tank, and a condensate supply water pipe is fixedly connected to the condensate jellyfish pipe inlet pipe, a condensate supply water branch pipe is fixedly connected between the condensate supply water pipe and the bypass pipe, a third water supply pipe is fixedly connected between the condensate supply water branch pipe and the third water supply end of the cold water tank, and a second connecting pipe is fixedly connected between the condensate jellyfish pipe inlet pipe and the condensate supply water branch pipe; a cold water pump and a valve are fixedly installed on the water outlet pipe, and valves are fixedly installed on the liquid outlet pipes on both sides of the second water supply pipe, the condensate supply water pipes on both sides of the condensate supply water branch pipe, the condensate supply water branch pipe between the second connecting pipe and the third water supply pipe, the first water supply pipe, the second water supply pipe, the third water supply pipe, the first connecting pipe, the second connecting pipe and the condensate jellyfish pipe inlet pipe.

[0006] The following are further optimizations and / or improvements to the above technical solutions:

[0007] The above-mentioned condenser hot water well and water discharge expansion tank are provided on the outside of the fixed cooling water tank; an inlet / outlet end is provided at the bottom of the water discharge expansion tank, and an inlet / drainage pipe is fixedly connected to the inlet / outlet end of the water discharge expansion tank, a third connecting pipe is fixedly connected between the first connecting pipe and the inlet / drainage pipe, a fourth connecting pipe is fixedly connected between the inlet / drainage pipe and the return water end of the condenser hot water well, a condensate jellyfish pipe is fixedly connected to the water outlet end of the condenser hot water well, a condensate jellyfish pipe is fixedly connected between the condensate jellyfish pipe and the third connecting pipe, a condensate jellyfish pipe water inlet pipe is fixedly connected, a condensate pump and a valve are respectively fixed on the condensate jellyfish pipe, and valves are respectively fixedly installed on the third connecting pipe on both sides of the condensate jellyfish pipe water inlet pipe, the condensate jellyfish pipe water inlet pipe between the second connecting pipe and the third connecting pipe, the inlet / drainage pipe on both sides of the third connecting pipe, and the fourth connecting pipe.

[0008] The above-mentioned water storage tank is arranged outside the fixed cold water tank, and the water outlet ends of the inlet / discharge pipe and the overflow pipe are located above the water storage tank.

[0009] A liquid level meter is fixedly installed on the above-mentioned fixed cooling water tank; a valve is fixedly installed on the overflow pipe between the overflow end of the fixed cooling water tank and the liquid outlet pipe.

[0010] The above valves are all electromagnetic pneumatic valves.

[0011] The above-mentioned conductivity detection device is a conductivity measuring instrument or a conductivity detector; a flow meter is fixedly installed on the second water supply pipe.

[0012] The present invention has a reasonable and compact structure and is easy to use. Through the coordinated use of the fixed-conductivity cooling water tank, the condensate jellyfish pipe water pipe, the condensate replenishment water pipe, the first replenishment pipe, the second replenishment pipe and the third replenishment pipe, the purpose of mixing the condensate water with high conductivity and the condensate replenishment water with low conductivity and replenishing it into the fixed-conductivity cooling water tank after the conductivity is qualified is achieved. The problem of excessive conductivity of the fixed-conductivity cooling water caused by the difficulty in controlling the conductivity is completely solved. The present invention has the characteristics of safety and reliability, facilitates operation, improves work efficiency, reduces production costs, and eliminates safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 The process flow chart of the best embodiment of the present invention.

[0014] The codes in the accompanying drawings are: 1 is a cooling water tank, 2 is an ion exchanger mixed bed, 3 is an overflow pipe, 4 is a first water supply pipe, 5 is a liquid outlet pipe, 6 is a water outlet pipe, 7 is a first connecting pipe, 8 is a second water supply pipe, 9 is a bypass pipe, 10 is a conductivity detection device, 11 is a condensate jellyfish pipe water supply pipe, 12 is a condensate supply water supply pipe, 13 is a condensate supply water supply branch pipe, 14 is a third water supply pipe, 15 is a second connecting pipe, 16 is a cooling water pump, 17 is a valve, 18 is a condenser hot water well, 19 is a water discharge expansion tank, 20 is an inlet / discharge pipe, 21 is a third connecting pipe, 22 is a fourth connecting pipe, 23 is a condensate jellyfish pipe, 24 is a condensate pump, 25 is a reservoir, 26 is a liquid level meter, and 27 is a flow meter. DETAILED DESCRIPTION

[0015] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0016] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 The layout direction is determined by the

[0017] The present invention will be further described below in conjunction with embodiments and drawings:

[0018] As attached Figure 1As shown, the generator stator cooling water quality adjustment method includes a cooling water tank 1 and an ion exchanger mixed bed 2; a first water replenishment end and an overflow end are respectively provided at the upper part of the cooling water tank 1, the overflow end is located higher than the first water replenishment end, an overflow pipe 3 is fixedly connected to the overflow end of the cooling water tank 1, a first water replenishment pipe 4 is fixedly connected between the first water replenishment end of the cooling water tank 1 and the water inlet end of the ion exchanger mixed bed 2, and a first water replenishment pipe 4 is fixedly connected between the water outlet end of the ion exchanger mixed bed 2 and the overflow pipe 3. A liquid outlet pipe 5 is connected, a water outlet end is provided at the bottom of the fixed cold water tank 1, a water outlet pipe 6 is fixedly connected to the water outlet end of the fixed cold water tank 1, a first connecting pipe 7 is fixedly connected between the water outlet pipe 6 and the first water replenishment pipe 4, a second water replenishment end and a third water replenishment end are respectively provided at the lower part of the fixed cold water tank 1, a second water replenishment pipe 8 is fixedly connected between the liquid outlet pipe 5 and the second water replenishment end of the fixed cold water tank 1, a bypass pipe 9 is connected in parallel at the lower part of the second water replenishment pipe 8, and an electric conduction pipe 9 is fixedly installed The rate detection device 10 has a condensate jellyfish pipe water pipe 11 on the outside of the fixed cold water tank 1, a condensate replenishment water pipe 12 is fixedly connected to the condensate jellyfish pipe water pipe 11, a condensate replenishment water pipe 13 is fixedly connected between the condensate replenishment water pipe 12 and the bypass pipe 9, a third replenishment water pipe 14 is fixedly connected between the condensate replenishment water pipe 13 and the third replenishment water end of the fixed cold water tank 1, and a second connecting pipe 1 is fixedly connected between the condensate jellyfish pipe water pipe 11 and the condensate replenishment water pipe 13. 5; a cooling water pump 16 and a valve 17 are fixedly installed on the water outlet pipe 6, and valves 17 are fixedly installed on the liquid outlet pipe 5 on both sides of the inlet end of the second water supply pipe 8, the condensate supply water pipe 12 on both sides of the inlet end of the condensate supply water branch pipe 13, the condensate supply water branch pipe 13 between the second connecting pipe 15 and the third water supply pipe 14, the first water supply pipe 4, the second water supply pipe 8, the third water supply pipe 14, the first connecting pipe 7, the second connecting pipe 15 and the condensate jellyfish pipe water pipe 11. The ion exchanger mixed bed 2 is publicly known; through the coordinated use of the fixed cooling water tank 1, the condensate jellyfish water pipe 11, the condensate replenishment water pipe 12, the first replenishment water pipe 4, the second replenishment water pipe 8 and the third replenishment water pipe 14, the purpose of mixing the condensate water with high conductivity and the condensate replenishment water with low conductivity and replenishing it into the fixed cooling water tank 1 after the conductivity is qualified is achieved, which completely solves the problem of excessive conductivity of the fixed cooling water caused by the difficulty in controlling the conductivity. It has the characteristics of safety and reliability, facilitates operation, improves work efficiency, reduces production costs, and eliminates safety hazards.

[0019] The above generator stator cooling water quality adjustment method can be further optimized and / or improved according to actual needs:

[0020] As attached Figure 1As shown, a condenser hot water well 18 and a water discharge expansion tank 19 are provided on the outside of the fixed cooling water tank 1; an inlet / outlet end is provided at the bottom of the water discharge expansion tank 19, an inlet / drain pipe 20 is fixedly connected to the inlet / outlet end of the water discharge expansion tank 19, a third connecting pipe 21 is fixedly connected between the first connecting pipe 7 and the inlet / drain pipe 20, a fourth connecting pipe 22 is fixedly connected between the inlet / drain pipe 20 between the inlet end of the third connecting pipe 21 and the bottom inlet / outlet end of the water discharge expansion tank 19 and the return water end of the condenser hot water well 18, and a A condensate jellyfish pipe 23 is fixedly connected with a condensate jellyfish pipe water inlet pipe 11 between the condensate jellyfish pipe 23 and the third connecting pipe 21. A condensate pump 24 and a valve 17 are respectively fixed on the condensate jellyfish pipe 23 between the inlet end of the condensate jellyfish pipe water inlet pipe 11 and the outlet end of the condenser hot water well 18. The valve 17 is respectively fixedly installed on the third connecting pipe 21 on both sides of the outlet end of the condensate jellyfish pipe water inlet pipe 11, the condensate jellyfish pipe water inlet pipe 11 between the second connecting pipe 15 and the third connecting pipe 21, and the inlet / discharge pipe 20 on both sides of the outlet end of the third connecting pipe 21 and the fourth connecting pipe 22. Therefore, the water discharge expansion tank 19 is equivalent to a water storage container; the condenser hot water well 18 is an existing publicly known public well; in this way, condensate is added to the condensate jellyfish water pipe 11 through the condenser hot water well 18, the condensate is mixed with the condensate replenishment water in the condensate replenishment water pipe 12, and then added to the fixed cooling water tank 1 after the conductivity is qualified.

[0021] As attached Figure 1 As shown, there is a water reservoir 25 outside the fixed cold water tank 1, and the water outlet ends of the inlet / drain pipe 20 and the overflow pipe 3 are located above the water reservoir 25. In this way, the water reservoir 25 is convenient for recovering the water discharged from the inlet / drain pipe 20 and the overflow pipe 3.

[0022] As attached Figure 1 As shown, a liquid level meter 26 is fixedly installed on the cooling water tank 1, and a valve 17 is fixedly installed on the overflow pipe 3 between the overflow end of the cooling water tank 1 and the liquid outlet pipe 5. In this way, the liquid level meter 26 is convenient for detecting the liquid level of the cooling water tank 1.

[0023] As required, valve 17 is an electromagnetic pneumatic valve. Like this, during work, PLC or microcomputer can be directly electrically connected with the electromagnetic pneumatic valve, is convenient to detect and control the opening of valve 17 automatically.

[0024] According to the needs, the conductivity detection device 10 is a conductivity meter or a conductivity detector; a flow meter 27 is fixedly installed on the second water supply pipe 8. In this way, the conductivity meter or the conductivity detector is convenient for real-time detection of the conductivity of the cold water filled in the cold water tank 1.

[0025] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0026] The use process of the best embodiment of the present invention is as follows: when working, the conductivity of the water (condensate) from the condensate pump 24 is 5.0μS / cm and the pH is about 9.3, and the conductivity of the water (condensate replenishment water) from the condensate replenishment water inlet pipe 12 is less than 0.3μS / cm and the pH value is about 7.0. By controlling the opening of the valve 17 on the condensate jellyfish pipe inlet pipe 11 and the condensate replenishment water inlet pipe 12, the conductivity of the mixed water is controlled at 1.0μS / cm to 1.5μS / cm, and the qualified mixed water is directly added to the cooling water tank 1 to ensure that the pH value and conductivity of the cooling water in the cooling water tank 1 are qualified, and then pumped into the generator stator as cooling water through the outlet pipe 6 and the cooling water pump 16 on the cooling water tank 1.

[0027] (1) Water level control of cooling water tank 1

[0028] When the amount of mixed water added (condensate + condensate make-up water) is less than the amount of fixed cooling water discharged back to the condenser hot water well 18, the water level in the fixed cooling water tank 1 drops, and the automatic water make-up amount increases as the water level drops. When the final amount of mixed water make-up water added + automatic water make-up water = the amount of water discharged back to the condenser hot water well 18, the water level remains unchanged. Since the condensate make-up water and condensate water pressures are stable, once adjusted to normal, it can operate stably for a long time without any operation.

[0029] When the amount of mixed water added is greater than the amount of cold water discharged back to the condenser hot water well 18, the water make-up valve 17 on the cold water tank 1 (the valve 17 on the first make-up pipe 4, the second make-up pipe 8 and the third make-up pipe 14) is automatically closed. At this time, the amount of mixed water added = the amount of cold water discharged back to the condenser hot water well 18 + the amount of overflow water. The cold water tank 1 overflows. The overflow can be eliminated by adjusting the opening of the valve 17 on the condensate water pipe 11 and the condensate make-up water pipe 12. Or when the amount of mixed water added does not exceed 0.5t / h, the overflow can be eliminated by increasing the amount discharged back to the condenser hot water well 18. It is strictly forbidden to adjust or close the water make-up valve 17 on the cold water tank 1 or the valve 17 on the condensate make-up water pipe 12 to avoid low water level alarm events.

[0030] (2) Operation method

[0031] Properly open the condensate water pipe 11, the condensate make-up water pipe 12, the overflow pipe 3 and the water make-up valve 17 on the cold water tank 1, adjust the opening of the valve 17 on the second connecting pipe 15 and the third make-up water pipe 14, and use the on-site online conductivity and flow meter 27 to make the flow rate of the mixed water 0.5t / h and the conductivity between 1.0μS / cm and 1.5μS / cm. After stabilization, adjust the valve 17 on the cold water return pipe 18 of the condenser until the overflow pipe 3 on the cold water tank 1 does not overflow.

[0032] (3) Operation supervision and adjustment methods

[0033] The online value of the conductivity of the cooling water is displayed on the DCS screen in the control room. When the conductivity of the cooling water is close to the upper limit of the normal operating control value, the valve 17 on the condensate pipe 11 between the second connecting pipe 15 and the third connecting pipe 21 is adjusted according to the measurement results of the online conductivity meter. The amount of condensate in the mixed water is diverted and the automatic amount is increased to achieve the purpose of adjusting the conductivity of the cooling water.

Claims

1. A method for adjusting the quality of generator stator cooling water, characterized in that The invention comprises a cooling water tank and an ion exchanger mixed bed; a first water replenishment end and an overflow end are respectively provided at the upper part of the cooling water tank, the overflow end is higher than the first water replenishment end, an overflow pipe is fixedly connected to the overflow end of the cooling water tank, a first water replenishment pipe is fixedly connected between the first water replenishment end of the cooling water tank and the water inlet end of the ion exchanger mixed bed, a liquid outlet pipe is fixedly connected between the water outlet end of the ion exchanger mixed bed and the overflow pipe, a water outlet end is provided at the bottom of the cooling water tank, a water outlet pipe is fixedly connected to the water outlet end of the cooling water tank, a first connecting pipe is fixedly connected between the water outlet pipe and the first water replenishment pipe, a second water replenishment end and a third water replenishment end are respectively provided at the lower part of the cooling water tank, and a liquid outlet pipe is fixedly connected between the liquid outlet pipe and the second water replenishment end of the cooling water tank. A second water supply pipe is fixedly connected, a bypass pipe is connected in parallel at the lower part of the second water supply pipe, a conductivity detection device is fixedly installed on the bypass pipe, a condensate jellyfish pipe water supply pipe is provided on the outside of the cold water tank, a condensate supply water supply pipe is fixedly connected to the condensate jellyfish pipe water supply pipe, a condensate supply water supply branch pipe is fixedly connected between the condensate supply water supply pipe and the bypass pipe, a third water supply pipe is fixedly connected between the condensate supply water supply branch pipe and the third water supply end of the cold water tank, and a second connecting pipe is fixedly connected between the condensate jellyfish pipe water supply pipe and the condensate supply water supply branch pipe; a cold water pump and a valve are fixedly installed on the outlet pipe, respectively, and the liquid outlet pipes on both sides of the second water supply pipe, the condensate supply water supply pipes on both sides of the condensate supply water supply branch pipe, the second connecting pipe and the third water supply pipe Valves are fixedly installed on the condensate water supply branch pipe, the first water supply pipe, the second water supply pipe, the third water supply pipe, the first connecting pipe, the second connecting pipe and the condensate jellyfish pipe water supply pipe respectively; a condenser hot water well and a water discharge expansion tank are provided on the outside of the fixed cooling water tank; an inlet / outlet water end is provided at the bottom of the water discharge expansion tank, an inlet / drainage pipe is fixedly connected to the inlet / outlet water end of the water discharge expansion tank, a third connecting pipe is fixedly connected between the first connecting pipe and the inlet / drainage pipe, a fourth connecting pipe is fixedly connected between the inlet / drainage pipe and the return water end of the condenser hot water well, a condensate jellyfish pipe is fixedly connected to the water outlet end of the condenser hot water well, a condensate jellyfish pipe is fixedly connected to the condensate jellyfish pipe water supply pipe between the condensate jellyfish pipe and the third connecting pipe, and a condensate jellyfish pipe water supply pipe is fixedly connected to the condensate jellyfish pipe. The condensate pump and valve are fixed on the pipes respectively. The valves are fixedly installed on the third connecting pipe on both sides of the condensate jellyfish pipe water pipe, the condensate jellyfish pipe water pipe between the second connecting pipe and the third connecting pipe, the inlet / drainage pipe on both sides of the third connecting pipe, and the fourth connecting pipe respectively. There is a water reservoir outside the fixed cooling water tank, and the outlet ends of the inlet / drainage pipe and the overflow pipe are located above the water reservoir. A liquid level meter is fixedly installed on the fixed cooling water tank. A valve is fixedly installed on the overflow pipe between the overflow end of the fixed cooling water tank and the outlet pipe. All valves are electromagnetic pneumatic valves. The conductivity detection device is a conductivity meter or a conductivity detector. A flow meter is fixedly installed on the second water supply pipe. When working, the conductivity of the water coming from the condensate pump is 5.0μS / cm and the pH is 9.3, and the conductivity of the water coming from the condensate supply water pipe is less than 0.3μS / cm and the pH value is 7.0, by controlling the valve opening on the condensate water supply pipe and the condensate water supply pipe, the conductivity of the mixed water is controlled at 1.0μS / cm to 1.5μS / cm, and the qualified mixed water is directly added to the cooling water tank to ensure that the pH value and conductivity of the cooling water in the cooling water tank are qualified, and then pumped into the generator stator as cooling water through the outlet pipe and cooling water pump on the cooling water tank. .

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