Stator cooling water purification treatment system for power plant

Abstract

The utility model relates to a stator cooling water purification treatment system for a power plant. The stator cooling water purification treatment system comprises an ion exchange container, a stator cooling water tank and an alkali adding reactor, a stator cooling water loop is respectively formed between the ion exchange container and the stator cooling water tank and between the stator cooling water tank and the alkalifying reactor through pipelines, and the alkalifying reactor is used for adjusting the pH value of stator cooling water. The ion exchange container has the beneficial effects that the hydrogen type cation resin adding opening is additionally formed in the top of the ion exchange container, the oxyhydrogen type anion resin discharging opening is additionally formed in the middle of the ion exchange container, and the sodium type cation resin discharging opening is additionally formed in the bottom of the ion exchange container; now, only a small amount of anion and cation resin needs to be replaced and discharged; the alkali adding reactor is arranged to serve as an adjusting means for the low pH value of the stator water, and the pH value can be rapidly increased through the alkali adding reactor.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling water purification, in particular to a cooling water purification system for power plants. Background Art

[0002] The ion exchange vessels in the power plant's cooling water purification system consist of cation and cation resins, ensuring a conductivity of 1-2 μS / cm and a pH of 8-9. When cooling water quality falls short of standards, the original ion exchange vessel discharge port configuration prevents adjustment of the resin discharge, requiring the vessel cover to be opened and all failed resin replaced, impacting both construction schedule and cooling water quality. Furthermore, existing cooling water purification systems offer limited means of adjusting the pH of cooling water when it is low.

[0003] Therefore, in order to facilitate the adjustment and replacement of the ratio of anion and cation resins in the ion exchange container, and at the same time to meet the pH value adjustment needs, it is necessary to design and improve the original cooling water purification system, improve the pass rate of cooling water pH and conductivity, prevent generator copper corrosion, and improve the reliability of the generator and cooling water system. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a cooling water purification system for power plants.

[0005] The cooling water purification system for power plants includes an ion exchange container, a cooling water tank, and an alkali reactor. Pipes are respectively provided between the ion exchange container and the cooling water tank, and between the cooling water tank and the alkali reactor to form cooling water loops. The alkali reactor is used to adjust the pH value of the cooling water.

[0006] The ion exchange container is provided with anion resin and cation resin in upper and lower layers. The top of the ion exchange container is provided with a hydrogen type cation resin adding port, a sodium type cation resin discharging port and a hydroxyl type anion resin discharging port.

[0007] Preferably, the sodium type cation resin discharge port is located at the bottom of the ion exchange container, and the hydroxide type anion resin discharge port is located in the middle of the ion exchange container.

[0008] Preferably, an alkali addition port and an exhaust port are provided at the top of the alkali addition reactor, and a sewage outlet is provided at the bottom of the alkali addition reactor.

[0009] Preferably, the pipeline extending from the cooling water tank to the alkali adding reactor is connected to the top of the alkali adding reactor, and the pipeline extending from the alkali adding reactor to the cooling water tank is arranged above the sewage outlet.

[0010] Preferably, the pipe extending from the cooling water tank to the ion exchange container is connected above the anion resin discharge port, and the pipe extending from the ion exchange container to the cooling water tank is provided between the anion resin discharge port and the cation resin discharge port.

[0011] The beneficial effects of the utility model are:

[0012] 1) The utility model adds a hydrogen-type cation resin addition port on the top of the ion exchange container, a hydroxy-type anion resin discharge port in the middle of the ion exchange container, and a sodium-type cation resin discharge port at the bottom of the ion exchange container. Compared with the previous need to open the container cover to replace all the resins, only a small amount of anion and cation resins need to be replaced and discharged, saving the cost of resin materials. According to the conductivity and pH value of the cold water quality, the anion and cation resins can be quantitatively added and discharged without opening the container top cover, reducing manual operation and construction period.

[0013] 2) The utility model adds an alkali-adding reactor as a means of regulating the low pH value of the cooling water. The alkali-adding reactor can quickly increase the pH value, effectively ensuring the pH adjustment requirements during startup and shutdown, and can greatly improve the qualified rate of the pH and conductivity of the cooling water, prevent copper corrosion of the generator, and improve the reliability of the generator and the cooling water system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the cooling water purification system for power plants.

[0015] Explanation of reference numerals: ion exchange container 1, constant cooling water tank 2, alkali adding reactor 3, hydrogen type cation resin adding port 11, sodium type cation resin discharging port 12, hydroxide type anion resin discharging port 13, alkali adding port 31, exhaust port 32, sewage outlet 33. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the following embodiments. The following embodiments are provided solely to facilitate understanding of the present invention. It should be noted that, within the scope of the present invention, modifications may be made by a person skilled in the art without departing from the principles of the present invention. Such improvements and modifications are also within the scope of the claims of the present invention.

[0017] As an example, Figure 1 As shown, this cooling water purification system for power plants includes: an ion exchange container 1, a cooling water tank 2 and an alkali reactor 3; cooling water loops are formed by pipes between the ion exchange container 1 and the cooling water tank 2, and between the cooling water tank 2 and the alkali reactor 3.

[0018] In this embodiment, the oxyhydroxide anion resin is disposed above the sodium cation resin. The sodium cation resin discharge port 12 is disposed at the bottom of the ion exchange container 1, and the oxyhydroxide anion resin discharge port 13 is disposed in the middle of the ion exchange container 1. The pipeline extending from the cooling water tank 2 to the ion exchange container 1 is connected above the oxyhydroxide anion resin discharge port 13. The pipeline extending from the cooling water tank 2 to the ion exchange container 1 is disposed between the oxyhydroxide anion resin discharge port 13 and the cation resin discharge port 12.

[0019] The cooling water flows from the cooling water tank 2 to the ion exchange container 1, undergoes resin reaction, and then flows back to the cooling water tank 2. The ion exchange container 1 is provided with anion resin and cation resin in upper and lower layers. The top of the ion exchange container 1 is provided with a hydrogen type cation resin addition port 11. The ion exchange container 1 is also provided with a sodium type cation resin discharge port 12 and a hydroxide type anion resin discharge port 13.

[0020] The alkali reactor 3 is used to adjust the pH value of the cooling water. The cooling water flows from the cooling water tank 2 to the alkali reactor 3 and then back to the cooling water tank 2. The top of the alkali reactor 3 is equipped with an alkali addition port 31 and an exhaust port 32, and the bottom of the alkali reactor 3 is equipped with a sewage outlet 33. The pipeline extending from the cooling water tank 2 to the alkali reactor 3 is connected to the top of the alkali reactor 3, and the pipeline extending from the alkali reactor 3 to the cooling water tank 2 is located above the sewage outlet 33.

[0021] Example 2

[0022] As another embodiment, this second embodiment proposes, based on the first embodiment, a more specific cooling water purification system for power plants:

[0023] Anion resin reaction formula:

[0024] R-OH+Cl - =R-Cl+OH -

[0025] Cationic resin reaction formula:

[0026] R-H+Na + =R-Na+H +

[0027] 2R-Na+Cu 2+ =R2-Cu+2Na +

[0028] The cold water treated in the ion exchange container 1 is returned to the cold water tank 2 through a pipeline. According to the requirements of the cold water, the cold water in the cold water tank 2 can be input into the ion exchange container 1 for treatment multiple times.

[0029] When the pH is high and hydrogen-type cation resin needs to be added, pour an appropriate amount of hydrogen-type cation resin directly from the resin addition port 11 on the top of the ion exchange container 1 to avoid removing the large flange cover on the upper part of the ion exchange container 1; when the pH is lower than the standard, discharge an appropriate amount of anion resin from the anion resin discharge port 13; when the cation resin fails or all resins fail, discharge from the cation resin discharge port 12 at the bottom of the ion exchange container 1 and then add again.

[0030] When the ion exchange container 1 cannot adjust the pH of the cooling water to above 8, open the drain valve 33 at the bottom and the exhaust valve 32 at the top of the alkali reactor 3 to discharge the waste and release the gas. Then, add an appropriate amount of NaOH from the alkali addition port on the top of the alkali reactor 3, open the water inlet valve of the alkali reactor 3, and allow the cooling water to flow from the ion exchange container 1 into the alkali reactor 3. After mixing with the cooling water, it flows back to the cooling water tank 2, thereby achieving the goal of adjusting the pH of the cooling water to above 8 in a short time using the alkali reactor 3.

[0031] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0032] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A cooling water purification system for power plants, characterized in that: include: Ion exchange container, constant cooling water tank and alkali adding reactor; a constant cooling water loop is formed by pipes between the ion exchange container and the constant cooling water tank, and between the constant cooling water tank and the alkali adding reactor, and the alkali adding reactor is used to adjust the pH value of the constant cooling water; The ion exchange container is provided with anion resin and cation resin in upper and lower layers. The top of the ion exchange container is provided with a hydrogen type cation resin adding port, a sodium type cation resin discharging port and a hydroxyl type anion resin discharging port.

2. The cooling water purification system for power plants according to claim 1, characterized in that: The sodium type cation resin discharge port is arranged at the bottom of the ion exchange container, and the hydroxide type anion resin discharge port is arranged at the middle of the ion exchange container.

3. The cooling water purification system for power plants according to claim 1, characterized in that: The top of the alkali adding reactor is provided with an alkali adding port and an exhaust port, and the bottom of the alkali adding reactor is provided with a sewage outlet.

4. The cooling water purification system for power plants according to claim 3, characterized in that: The pipeline extending from the cooling water tank to the alkali adding reactor is connected to the top of the alkali adding reactor, and the pipeline extending from the alkali adding reactor to the cooling water tank is arranged above the sewage outlet.

5. The cooling water purification system for power plants according to claim 2, characterized in that: The pipeline extending from the fixed cooling water tank to the ion exchange container is connected to the upper part of the negative resin discharge port, and the pipeline extending from the ion exchange container to the fixed cooling water tank is arranged between the negative resin discharge port and the positive resin discharge port.

Images