Water supplementing system of water cooling tower

Abstract

The invention discloses a water supplementing system of a water cooling tower, and belongs to the field of power plant circulating water systems. In order to solve the problems of water quality deterioration, pollution discharge and water supplement caused by return water evaporation of the water cooling tower, an original pollution discharge port is transformed from the bottom of the water cooling tower to a circulating water return water main pipe, pollution discharge is performed by utilizing the pressure (more than 0.1 MPa) of the circulating water return water main pipe, the circulating water return water pressure is reduced, and the vacuum of a condenser is improved so as to reduce energy consumption; a water pump and an adjusting valve are additionally arranged on the two sewage discharging pipelines to adjust flow; a pipeline and a valve are arranged to intercommunicate backwater of the two water cooling towers to adjust the water temperature; water treated by the wastewater zero discharge system is recycled to the water cooling tower through a pipeline and a valve according to water quality. The system achieves accurate adjustment of water level, water quality and water temperature, improves water quality, reduces energy consumption, is reliable in operation and easy and convenient to operate, enhances unit safety, and increases economic benefits for enterprises.

Description

Technical Field

[0001] The present invention relates to the technical field of power plant circulating water systems, in particular to a cooling tower water replenishment system. Background Art

[0002] Cooling tower makeup water in a thermal power plant refers to water entering the cooling tower from various sources. The water in the cooling tower flows through the circulating water system into the condenser to cool the turbine exhaust within the condenser before returning to the cooling tower. Each unit's circulation system includes a natural draft cooling tower, a natural inlet flow path, three vertical circulating water pumps (wet-well diagonal flow pumps), one auxiliary water pump (wet-well diagonal flow pump), a double back-pressure condenser, a circulating water inlet main, and a circulating water outlet main.

[0003] Due to the high return water temperature of cooling towers, some of the return water evaporates after internal spraying, causing the water quality inside the cooling tower to gradually deteriorate. To control water quality, the cooling tower must be drained and replenished with new water. Directly discharging poor-quality wastewater outside the plant will deteriorate the water quality outside the plant.

[0004] Power plants are generally prohibited from discharging wastewater. Only qualified water can be discharged. The quality of treated water is better, so discharging it is a waste. Summary of the Invention

[0005] In response to the above-mentioned technical problems, the present invention provides a cooling tower water replenishment system, which optimizes the water replenishment and sewage discharge systems and increases economic benefits for enterprises.

[0006] The present invention provides a novel cooling tower water replenishment system, which includes pipes, valves, etc., to achieve precise adjustment of the water level, water quality and water temperature of the cooling tower.

[0007] The technical solution adopted by the present invention to solve its technical problems is: through the transformation of the sewage discharge interface of the cooling tower and the system, the flow regulation and treated water recycling of the wastewater zero discharge system are realized, and the water level and water quality of the cooling tower are controlled.

[0008] The specific transformation plan is as follows

[0009] Add parts 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.

[0010] The original sewage discharge interface was at the bottom of the cooling tower, relying on static pressure to discharge sewage. After the application of the wastewater zero discharge system, the flow was insufficient, so the interface was changed to the circulating water return main pipe, and the pressure could reach above 0.1MPa. By passing through valves (1, 2 or 4, 9), the circulating water return pressure was reduced, the condenser vacuum energy was increased, and the energy consumption of the unit was reduced.

[0011] Add water pumps and regulating valves (5 and 6) to the two sewage pipes to achieve adjustable flow of the circulating water treatment system.

[0012] Add another cooling tower pipe and valve (3 and 10) to the sewage pipe. By adjusting the valve, the return water from one cooling tower can be returned to the other cooling tower. Because the return water temperature of the circulating water of the two machines is different, the water temperature of the two cooling towers can be adjusted in this way.

[0013] 5.4 The treated water from the zero-discharge wastewater system is recycled to the two cooling towers through pipes and valves (7 and 8). The recycled water volume is increased according to the water quality. The cooling tower with poor water quality can recycle more treated water to improve the water quality.

[0014] Beneficial effects of the present invention:

[0015] After the application and transformation of this project, the reliable operation of the cooling tower water supply system can be achieved, accidents can be avoided, water quality can be improved, energy consumption can be reduced, operation can be simple and reliable, the safety of the unit can be enhanced, and economic benefits can be increased for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of a cooling tower water replenishment system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0019] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0020] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0021] Example 1

[0022] See Figure 1

[0023] The cooling tower water replenishment system of this invention aims to address the issues of water replenishment and related water quality, temperature, and level regulation in power plant cooling towers, achieving efficient, environmentally friendly, and energy-saving operation. Its core principle is to precisely control the water replenishment and drainage systems by modifying the cooling tower's wastewater connection and adding and optimizing a series of pipes, valves, and pumps. This, in turn, achieves multiple goals, including effective management of the zero-discharge wastewater system, improved cooling tower water quality, optimal water temperature regulation, and reduced unit energy consumption.

[0024] 2. Sewage Discharge Interface Reconstruction

[0025] Background and purpose of transformation

[0026] The original sewage connection was located at the bottom of the cooling tower and relied on static pressure to discharge sewage. After the zero wastewater discharge system was applied, the original static pressure sewage discharge method had the problem of insufficient flow.

[0027] The purpose of the transformation is to increase the sewage discharge flow rate, and at the same time use the pressure of the circulating water return main pipe (which can reach above 0.1MPa) to achieve better sewage discharge effect, and increase the condenser vacuum by reducing the circulating water return pressure, thereby reducing the energy consumption of the unit.

[0028] Specific transformation measures

[0029] Change the sewage discharge interface from the bottom of the cooling tower to the circulating water return main pipe.

[0030] Install valves (1, 2 or 4, 9) to control the flow of circulating water return water into the sewage connection by adjusting the degree of opening and closing of the valves. When the valves are properly opened, circulating water return water enters the sewage connection under pressure, ensuring sufficient sewage discharge power while reducing circulating water return water pressure, thereby increasing the condenser vacuum and achieving energy conservation.

[0031] 3. Flow regulation part

[0032] The necessity of flow regulation

[0033] In order to adapt to the flow requirements of the circulating water treatment system under different working conditions, the flow of circulating water needs to be accurately adjusted to ensure stable operation and efficient treatment of the system. DETAILED DESCRIPTION

[0034] Install water pumps and regulating valves (5 and 6) on the two sewage pipes respectively.

[0035] The pump provides power to transport wastewater to subsequent treatment stages. The throttle valve precisely controls the flow rate. For example, to increase the circulating water treatment system's throughput, the throttle valves (5 and 6) can be adjusted to increase the pump's flow rate. Conversely, to reduce the required throughput, the throttle valve opening can be adjusted to reduce the wastewater flow rate.

[0036] 4. Water temperature regulation part

[0037] Water temperature regulation principle

[0038] Since the return water temperature of circulating water of different units is different, by transporting the return water of one cooling tower to another cooling tower, the water temperature of the two cooling towers can be adjusted, so that the water temperature in the cooling towers can be maintained in a more suitable range, thereby improving the cooling efficiency.

[0039] Specific steps

[0040] Add pipes and valves (3 and 10) to another cooling tower on the sewage pipe.

[0041] When the water temperature of the two cooling towers needs to be adjusted, valves (3 and 10) are opened or closed according to the actual water temperature. If the water temperature of one cooling tower is too high, the corresponding valve can be opened to introduce return water from the other cooling tower with lower water temperature to achieve water temperature balance and adjustment.

[0042] 5. Water quality regulation

[0043] Water quality regulation targets

[0044] According to the water quality of the two cooling towers, the recycling amount of treated water of the wastewater zero discharge system is reasonably allocated so that the cooling tower with poor water quality can get more treated water replenishment, thereby improving the overall water quality.

[0045] Implementation details

[0046] The treated water of the zero discharge wastewater system is connected to two cooling towers through pipes and valves (7 and 8).

[0047] Real-time monitoring of water quality parameters, such as pH and suspended solids content, in both cooling towers is performed. If the water quality in one cooling tower is poor, valves (7 and 8) are adjusted to increase the amount of treated water recycled from that cooling tower. Once the treated water enters the cooling tower, it mixes with the raw water within the tower, diluting the impurity concentration and improving the water quality.

[0048] 6. Overall system operation effect

[0049] Water quality improvement effect

[0050] Through the above-mentioned adjustment measures, especially the reasonable recycling of wastewater zero discharge system treated water in the water quality adjustment part, the impurity content in the cooling tower can be effectively reduced, the equipment corrosion and scaling problems caused by water quality deterioration can be reduced, the equipment service life can be extended, and the operating stability of the circulating water system can be improved.

[0051] Energy consumption reduction effect

[0052] The sewage connection modification reduced the circulating water return pressure, increased the condenser vacuum, and reduced energy consumption during unit operation. Furthermore, precise flow regulation helps the system operate under optimal conditions, avoiding energy waste caused by unreasonable flow.

[0053] Operational convenience and reliability

[0054] The entire cooling tower water replenishment system is relatively simple to operate, with valves, pumps, and other components easily controlled and adjusted. Through rational design and layout, the system operates with high reliability, effectively preventing accidents and enhancing unit safety. This provides a strong guarantee for the company's normal production, while also generating significant economic benefits.

[0055] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A cooling tower water replenishment system, characterized in that: include: In the sewage connection modification part, the connection originally located at the bottom of the cooling tower that relies on static pressure to discharge sewage is changed to the circulating water return main pipe, which is connected through valves (1, 2 or 4, 9) to utilize the circulating water return pressure. Lowering the circulating water return pressure can increase the condenser vacuum to reduce the energy consumption of the unit; In the flow regulation part, water pumps and regulating valves (5 and 6) are added to the two sewage pipes respectively to achieve flow adjustment of the circulating water treatment system; In the water temperature regulation part, a pipe and valve (3 and 10) for another cooling tower are added to the sewage pipe. By adjusting the valve, the return water from one cooling tower can be transported to the other cooling tower to regulate the water temperature of the two cooling towers; In the water quality regulation part, the treated water of the wastewater zero discharge system is recycled to the two cooling towers through pipes and valves (7 and 8). The recycling amount is increased according to the water quality of the cooling tower. The cooling tower with poor water quality recycles more treated water to improve the water quality.

2. The circulating water replenishment system according to claim 1, wherein the valve (1, 2 or 4, 9) is used to control the flow rate of the circulating water back to the sewage outlet.

3. The circulating water replenishment system according to claim 1, wherein the water pump and the regulating valve (5 and 6) can achieve precise regulation of the flow rate of the circulating water treatment system.

4. The circulating water replenishment system according to claim 1, wherein the pipes and valves (3 and 10) can realize the mutual transportation of return water between the two cooling towers.

5. The circulating water replenishment system according to claim 1, wherein the pipes and valves (7 and 8) can control the recovery amount of treated water of the wastewater zero discharge system according to the water quality of the cooling tower.

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