Water quality regulation and control device for internal cooling water of generator

Abstract

An internal cooling water quality regulation control device of a generator is characterized in that an inlet of an inlet filter is communicated with an internal cooling water outlet main pipe of an internal cooling water cooler of the generator through a pipeline, an outlet of the inlet filter is communicated with an inlet of a weakly alkaline ion exchanger through a pipeline, and an outlet of the weakly alkaline ion exchanger is communicated with an inlet of a precision filter through a pipeline; an outlet of the precision filter is communicated with an inlet of the outlet filter through a pipeline, an outlet of the outlet filter is communicated with the inner cold water tank through a pipeline, and the automatic micro-alkali adjusting device is communicated with an outlet of the weak-alkali ion exchanger through a pipeline; by reducing the conductivity of an internal cooling water system and improving the pH value, the corrosion of internal cooling water is reduced, the corrosion of a hollow copper wire rod is reduced, the safety of a generator set is improved, the conductivity and pH of the internal cooling water can be effectively controlled, corrosion products of the system and pollutants brought by the outside can be removed, and the device is an efficient and environment-friendly treatment system.

Description

Technical Field

[0001] This utility model belongs to the technical field of industrial water treatment devices or equipment, specifically relating to a generator internal cooling water quality regulation and control device. Background Technology

[0002] With increasingly stringent environmental protection requirements, emissions control in the steel industry is becoming more stringent. To better meet these requirements and bring better economic benefits to steel companies, the number of generator sets in steel enterprises is rapidly increasing. However, during operation, many power plants have experienced varying degrees of excessive copper ion content in the cooling water of their generators, seriously affecting the service life and safe operation of the generator sets.

[0003] The generator stator and rotor windings are both water-cooled, forming a dual-water internal cooling system. The stator and rotor share an independent self-circulating system. Internal cooling water is drawn from a water tank, pressurized, and enters the cooler, then passes through a filter and into the generator coils. The effluent flows back to the water tank, continuously circulating. The replenishment water is secondary demineralized water. Existing methods for controlling the quality of generator internal cooling water include: ① mixed-bed treatment; ② membrane alkalization treatment; ③ adding condensate to the internal cooling water; and ④ corrosion inhibitors. However, methods ① and ② have short operating cycles and high operating costs, method ③ suffers from ammonia corrosion caused by ammonium ions, and the corrosion inhibitors used in method ④ require specific conditions, are highly toxic, and expensive. Currently, some generator internal cooling water treatment methods use ion exchange + alkali addition, but this method cannot overcome the shortcomings of insufficient removal of fine suspended solids, significant resin contamination, and the easy deposition of insoluble substances in the internal cooling water system.

[0004] The announcement number is CN210237362U, and the invention name is: Generator Internal Cooling Water Quality Adjustment and Control Device. This patent involves setting up an alkaline tank on the return water pipe to add alkaline solution to the cooling water tank for adjusting the water quality. However, this method will cause waste of demineralized water, which is not in line with the concept of energy conservation and emission reduction. At the same time, continuous replenishment of demineralized water will lower the internal cooling water temperature, which is not conducive to the control of generator cooling water temperature. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a generator internal cooling water quality regulation and control device that is reasonably designed, simple in structure, improves the pH value of the internal cooling water system, reduces the corrosivity of the internal cooling water, reduces the corrosion of the hollow copper wire rod, and improves the safety of the generator set.

[0006] The technical solution adopted to solve the above-mentioned technical problems is: a generator internal cooling water quality adjustment and control device, wherein the inlet of the inlet filter is connected to the internal cooling water outlet header of the generator internal cooling water cooler through a pipe, the outlet is connected to the inlet of the weak alkaline ion exchanger through a pipe, the outlet of the weak alkaline ion exchanger is connected to the inlet of the precision filter through a pipe, the outlet of the precision filter is connected to the inlet of the outlet filter through a pipe, the outlet of the outlet filter is connected to the internal cooling water tank through a pipe, and the automatic micro-alkali adjustment device is connected to the outlet of the weak alkaline ion exchanger through a pipe.

[0007] The automatic micro-alkali adjustment device of this utility model is equipped with an automatic drug dissolving device, which uses an alkali circulation pump to dissolve and prepare the drug. The alkali circulation pump is a self-priming diaphragm pump.

[0008] The inlet and outlet filters of this invention use stainless steel filter elements with a gap of less than 0.2 mm.

[0009] The weakly alkaline ion exchanger of this invention consists of a specially structured ion exchanger and a special resin. The specially structured ion exchanger is a two-chamber or three-chamber ion exchanger, and the special resin is prepared by mixing strong ion exchange resin in a certain proportion.

[0010] The precision filter of this invention uses a high-flow-rate pleated filter element with a filtration accuracy of 1μm or 5μm.

[0011] This invention employs an internal cooling water cooler with an inlet filter, a weakly alkaline ion exchanger, a precision filter, and an outlet filter sequentially installed at the outlet header. The inlet filter reduces suspended solids in the incoming water, mitigating the risk of resin contamination. The weakly alkaline ion exchanger removes some anions and cations through ion exchange, reducing conductivity, and simultaneously utilizes the resin's imbalance to increase the pH value of the internal cooling water. The dual filtration of the precision and outlet filters maximizes the removal of system corrosion products. An automatic micro-alkali adjustment device further increases the pH of the outlet water by adding trace amounts of alkaline substances to the outlet pipe of the weakly alkaline ion exchanger, thereby raising the pH value of the internal cooling water system. This increased pH value reduces the corrosiveness of the internal cooling water, minimizes corrosion of the hollow copper wire rods, and improves the safety of the generator set. This device not only effectively controls the conductivity and pH of the internal cooling water but also removes system corrosion products and externally introduced pollutants, making it a highly efficient and environmentally friendly treatment system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram: 1. Inlet filter; 2. Weakly alkaline ion exchanger; 3. Precision filter; 4. Outlet filter; 5. Automatic micro-alkali adjustment device; 6. Alkali circulation pump. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0015] Example 1

[0016] exist Figure 1 This utility model relates to a generator internal cooling water quality adjustment and control device. The inlet of the inlet filter 1 is connected to the generator internal cooling water outlet header via a pipe, and its outlet is connected to the inlet of a weakly alkaline ion exchanger 2 via a pipe. The outlet of the weakly alkaline ion exchanger 2 is connected to the inlet of a precision filter 3 via a pipe. The precision filter 3 uses a high-flow-rate pleated filter element with a filtration accuracy of 1μm or 5μm to remove suspended solids from the internal cooling water. The weakly alkaline ion exchanger 2 consists of a special structure ion exchanger and special resin. The special structure ion exchanger is a two-chamber or three-chamber ion exchanger, and the special resin is a strong ion exchange resin prepared in a specific ratio to achieve a weakly alkaline effluent from the ion exchanger. The outlet of the precision filter 3 is connected to the inlet of an outlet filter 4 via a pipe, and the outlet of the outlet filter 4 is connected to the internal cooling water tank via a pipe. In this embodiment, the filter elements of the inlet filter 1 and the outlet filter 4 are made of high-strength, corrosion-resistant, and unbreakable TP316L stainless steel, with a filter element gap of less than 0.2mm. The automatic micro-alkali adjustment device 5 is connected to the outlet of the weakly alkaline ion exchanger 2 via a pipeline. The automatic micro-alkali adjustment device 5 is equipped with an automatic drug dissolving device, which dissolves and prepares the drug through the alkali circulation pump 6. The alkali circulation pump 6 is a self-priming diaphragm pump. The automatic micro-alkali adjustment device 5 consists of an adjustment controller, a human-machine interface, a precision metering pump, online instruments, etc. The adjustment controller adopts a PID controller or a PLC controller. The adjustment controller controls the precision metering pump by collecting online conductivity and pH instrument signals to achieve the purpose of adjusting the dosage of alkaline drugs.

[0017] The working principle of this utility model is as follows:

[0018] The inlet of the system inlet filter 1 is connected to the outlet header of the internal cooling water cooler via a pipe, and the outlet of the inlet filter 1 is connected to the inlet of the weakly alkaline ion exchanger 2 via a pipe. The inlet filter 1 reduces suspended solids in the influent, thus reducing the risk of resin contamination. The weakly alkaline ion exchanger 2 removes some anions and cations through ion exchange, reducing conductivity. At the same time, it utilizes the imbalance of the resin to increase the pH value of the internal cooling water. The dual filtration effect of the precision filter 3 and the outlet filter 4 maximizes the removal of system corrosion products. The automatic micro-alkali adjustment device 5 adds a trace amount of alkaline substance to the outlet pipe of the weakly alkaline ion exchanger 2 to further increase the pH of the outlet water, thereby increasing the pH value of the internal cooling water system. Increasing the pH value of the internal cooling water system reduces the corrosiveness of the internal cooling water, reduces the corrosion of the hollow copper wire rod, and improves the safety of the generator set.

Claims

1. A generator internal cooling water quality adjustment and control device, characterized in that: The inlet of the inlet filter (1) is connected to the outlet of the generator's internal cooling water cooler via a pipe, and the outlet is connected to the inlet of the weak alkaline ion exchanger (2) via a pipe. The outlet of the weak alkaline ion exchanger (2) is connected to the inlet of the precision filter (3) via a pipe. The outlet of the precision filter (3) is connected to the inlet of the outlet filter (4) via a pipe. The outlet of the outlet filter (4) is connected to the internal cooling water tank via a pipe. The automatic micro-alkali adjustment device (5) is connected to the outlet of the weak alkaline ion exchanger (2) via a pipe.

2. The generator internal cooling water quality adjustment and control device according to claim 1, characterized in that: The automatic micro-alkali adjustment device (5) is equipped with an automatic drug dissolving device, and the drug is dissolved and prepared by an alkali circulation pump (6), which is a self-priming diaphragm pump.

3. The generator internal cooling water quality adjustment and control device according to claim 1, characterized in that: The filter elements of the inlet filter (1) and outlet filter (4) are made of stainless steel and the filter element gap is less than 0.2 mm.

4. The generator internal cooling water quality adjustment and control device according to claim 1, characterized in that: The weakly alkaline ion exchanger (2) is composed of a special structure ion exchanger and a special resin. The special structure ion exchanger is a two-chamber or three-chamber ion exchanger, and the special resin is prepared by mixing strong ion exchange resin in a certain proportion.

5. The generator internal cooling water quality adjustment and control device according to claim 1, characterized in that: The precision filter (3) uses a high-flow-rate pleated filter element with a filtration accuracy of 1μm or 5μm.

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