Water jetting system for waste heat power generation

Abstract

The water jetting system for waste heat power generation comprises a water jetting box and a transfer box connected with the water jetting box through an overflow pipe, water overflowing from the water jetting box can enter the transfer box through the overflow pipe to be temporarily stored so that follow-up recycling can be facilitated, and water resources are saved. A water outlet pipe is communicated with the lower part of one side of the water jet tank, a softened water inlet pipe is communicated with the bottom close to the water outlet pipe, a water jet pump is arranged on the water outlet pipe, one end of the water outlet pipe is connected with a water jet air ejector, and the softened water inlet pipe and the water outlet pipe are close to each other, so that the temperature of water pumped by the water jet pump is relatively low, and the working efficiency of the water jet air ejector is improved; the bottom of the cooling tower is connected with the softened water inlet pipe through the circulating pipe and the circulating pump, return water of the water jet air extractor can be pumped to the softened water inlet pipe again through the circulating pipe under the action of the circulating pump after being cooled through the cooling tower, and the water resource utilization rate is further increased. Meanwhile, softened water is used in the system, water scaling in the using process can be avoided, and the operation time of the water jetting and air pumping system is shortened.

Description

Technical Field

[0001] This utility model relates to the field of waste heat power generation technology, and in particular to a water jetting system for waste heat power generation. Background Technology

[0002] In waste heat power generation systems, the ejector tank is an important auxiliary device, mainly used for the condensation of exhaust steam from the turbine. It works by using an ejector pump to draw water from the ejector tank, pressurize it, and send it to the nozzle of the ejector jet. The high-speed water jet creates a high-vacuum negative pressure zone in the water chamber, maintaining the vacuum state of the condenser. The water temperature and level in the ejector tank directly affect the efficiency of the ejector jet. Currently, power plants generally maintain the water temperature and level in the ejector tank by continuously replenishing it with water, using overflow to maintain the water level and temperature. However, the overflow water is mostly discharged directly into the drainage ditch, easily wasting water resources. Furthermore, the industrial water currently used is prone to scaling, prolonging the operating time of the ejector jet system. The distance between the water replenishment pipe and the ejector tank outlet pipe is also relatively far, resulting in high water temperature in the ejector tank, which in turn affects the efficiency of the ejector jet and reduces the turbine vacuum. Utility Model Content

[0003] The purpose of this application is to provide a water jetting system for waste heat power generation, in order to solve the problems that most of the overflow water from the existing water jetting tank is discharged into the ditch, resulting in water waste, and that the industrial water currently used is prone to scaling, which leads to a longer operating time of the water jetting air extraction system. At the same time, the high water temperature in the water jetting tank affects the working efficiency of the water jetting air extractor and the vacuum degree of the steam turbine.

[0004] To solve the above-mentioned technical problems, this application provides a water jetting system for waste heat power generation, comprising:

[0005] The water jet tank and a transfer box located on one side of the water jet tank are provided. A water outlet pipe is connected to the lower part of one side of the water jet tank, and a softened water inlet pipe is connected to the bottom of the water jet tank near the water outlet pipe. A water jet pump is installed on the water outlet pipe, and a water jet air ejector is connected to one end of the water outlet pipe. The water jet air ejector is connected to a cooling tower through a return water pipe. The bottom of the cooling tower is connected to the softened water inlet pipe through a circulation pipe and a circulation pump. An overflow pipe is installed on the top of the water jet tank, and one end of the overflow pipe is connected to the transfer box.

[0006] In a preferred embodiment, a waste heat power generation water jetting system is provided, wherein the softened water inlet pipe is further provided with a backup water inlet pipe, and the backup water inlet pipe is provided with a control valve.

[0007] As a preferred embodiment, a waste heat power generation water jetting system is provided, wherein a return pipe is also provided on the lower part of one side of the transfer box, and one end of the return pipe is connected to the softened water inlet pipe.

[0008] The solution requires detailed explanation of a waste heat power generation water jetting system, wherein thermometers are also installed on the outlet pipe, the return pipe, and the circulation pipe.

[0009] As a preferred embodiment, a water jetting system for waste heat power generation is provided, wherein a pressure gauge is also installed on the water outlet pipe.

[0010] Compared with the prior art, the waste heat power generation water jetting system provided by this utility model includes a water jetting tank and a transfer tank located on one side of the water jetting tank. An overflow pipe is provided on the top of the water jetting tank, and one end of the overflow pipe is connected to the transfer tank. During use, the water overflowing from the water jetting tank can enter the transfer tank through the overflow pipe for temporary storage, so as to be recycled later and save water resources. The lower side of the water jet tank is connected to an outlet pipe, and the bottom near the outlet pipe is connected to a softened water inlet pipe. A water jet pump is installed on the outlet pipe, and one end of the outlet pipe is connected to a water jet ejector. Positioning the softened water inlet and outlet pipes close together ensures that the water pumped by the water jet pump is at a lower temperature, improving the efficiency of the water jet ejector and reducing the turbine vacuum. The water jet ejector is connected to a cooling tower via a return pipe. The bottom of the cooling tower is connected to the softened water inlet pipe via a circulation pipe and a circulation pump. The return water from the water jet ejector, after being cooled by the cooling tower, is then pumped back to the softened water inlet pipe by the circulation pump and reused in the water jet tank, further improving water resource utilization. Simultaneously, this system uses softened water, which avoids scale buildup during use and shortens the operating time of the water jet ejector system. Attached Figure Description

[0011] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0012] Figure 1 This is a schematic diagram of a waste heat power generation water jetting system provided in an embodiment of this application;

[0013] In the diagram: 1. Water jet tank; 2. Transfer tank; 3. Outlet pipe; 4. Softened water inlet pipe; 5. Water jet pump; 6. Water jet air ejector; 7. Return pipe; 8. Cooling tower; 9. Circulation pipe; 10. Circulation pump; 11. Overflow pipe; 12. Backup inlet pipe; 13. Control valve; 14. Return pipe; 15. Thermometer; 16. Pressure gauge. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0015] The core of this application is to provide a water jetting system for waste heat power generation, which solves the problems that most of the overflow water from the existing water jetting tank is discharged into the ditch, resulting in water waste, and that the industrial water currently used is prone to scaling, which leads to a longer operating time of the water jetting air extraction system. At the same time, the high water temperature in the water jetting tank affects the working efficiency of the water jetting air extractor and the vacuum degree of the steam turbine.

[0016] Figure 1 This is a schematic diagram of a waste heat power generation water jetting system provided in an embodiment of this application. See also... Figure 1 As shown.

[0017] Example 1

[0018] A waste heat power generation water jetting system includes a water jetting tank 1 and a transfer tank 2 located on one side of the water jetting tank 1. In actual use, an external ladder is also installed on the outside of the water jetting tank 1 to facilitate maintenance and other operations. The external ladder is not shown in the figure. The current state and size of the water jetting tank 1 and the transfer tank 2 can be determined according to the actual situation. A water outlet pipe 3 is connected to the lower part of one side of the water jetting tank 1. A softened water inlet pipe 4 is connected to the bottom of the water jetting tank 1 near the water outlet pipe 3. One end of the softened water inlet pipe 4 is connected to a reverse osmosis device, which is not shown in the figure. The water output after reverse osmosis treatment is softened water. A water jetting pump 5 is installed on the water outlet pipe 3. A water jetting air ejector 6 is connected to one end of the water outlet pipe 3. By placing the softened water inlet pipe 4 and the water outlet pipe 3 close to each other, the temperature inside the water jetting tank 1 can be effectively reduced, ensuring that the water pumped out by the water jetting pump 5 is at a lower temperature. Water pumped by the water jet pump 5 is transported to the water jet ejector 6 through the outlet pipe 3 and sprayed out. The water jet ejector 6 is connected to a cooling tower 8 through a return water pipe 7. The bottom of the cooling tower 8 is connected to the softened water inlet pipe 4 through a circulation pipe 9 and a circulation pump 10. The cooling tower 8 can cool the return water from the water jet ejector 6. Starting the circulation pump 10 can pump the return water back to the softened water inlet pipe 4 through the circulation pipe 9 and reuse it in the water jet tank 1, thereby improving water resource utilization. An overflow pipe 11 is provided at the top of the water jet tank 1. One end of the overflow pipe 11 is connected to the transfer box 2. During use, water overflowing from the overflow pipe 11 can be temporarily stored in the transfer box 2 to avoid water waste. The system provided in this embodiment can increase the condenser vacuum by 1-2 kPa.

[0019] Example 2

[0020] Based on Example 1, a waste heat power generation water jetting system, to prevent the water jetting tank 1 from shutting down during maintenance of equipment such as the softened water pump or backwashing of the water treatment equipment, thus affecting the unit's operation, preferably includes a backup water inlet pipe 12 on the softened water inlet pipe 4, with a control valve 13 installed on the backup water inlet pipe 12. In this case, the control valve 13 can be opened to supply water to the water jetting tank 1 through the backup water inlet pipe 12, ensuring that the water jetting tank 1 does not stop operating.

[0021] Based on Example 1, a waste heat power generation water jetting system, in order to achieve water recycling, preferably includes a return pipe 14 installed on the lower side of one side of the transfer tank 2. One end of the return pipe 14 is connected to the softened water inlet pipe 4. After the overflow water exchanges heat in the transfer tank 2, it can be transported back to the softened water inlet pipe 4 via the return pipe 14 and then returned to the water jetting tank 1 for recycling, thus saving water resources.

[0022] In this embodiment, a waste heat power generation water jetting system is preferably equipped with a thermometer 15 on the outlet pipe 3, the return pipe 14 and the circulation pipe 9 to facilitate water temperature detection.

[0023] Based on Example 1, in order to facilitate water pressure detection and ensure safe system operation, a pressure gauge 16 is preferably installed on the outlet pipe 3 of a waste heat power generation water jet system.

[0024] The present invention provides a water jetting system for waste heat power generation, including a water jetting tank 1 and a transfer tank 2 located on one side of the water jetting tank 1. An overflow pipe 11 is provided on the top of the water jetting tank 1, and one end of the overflow pipe 11 is connected to the transfer tank 2. During use, water overflowing from the water jetting tank 1 can enter the transfer tank 2 through the overflow pipe 11 for temporary storage, so as to be recycled later and save water resources. A water outlet pipe 3 is connected to the lower side of the water jet tank 1, and a softened water inlet pipe 4 is connected to the bottom near the outlet pipe 3. A water jet pump 5 is installed on the outlet pipe 3, and a water jet ejector 6 is connected to one end of the outlet pipe 3. The close proximity of the softened water inlet pipe 4 and the outlet pipe 3 ensures that the water pumped by the water jet pump 5 is at a lower temperature, improving the working efficiency of the water jet ejector 6 and reducing the turbine vacuum. The water jet ejector 6 is connected to a cooling tower 8 through a return water pipe 7. The bottom of the cooling tower 8 is connected to the softened water inlet pipe 4 through a circulation pipe 9 and a circulation pump 10. The return water from the water jet ejector 6 is cooled by the cooling tower 8 and then pumped back to the softened water inlet pipe 4 through the circulation pipe 9 under the action of the circulation pump 10, and reused in the water jet tank 1, further improving water resource utilization. At the same time, this system uses softened water, which can avoid water scaling during use and shorten the operation time of the water jet ejector system.

[0025] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0026] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A water jetting system for waste heat power generation, characterized in that, include: A water jet tank (1) and a transfer box (2) located on one side of the water jet tank (1). A water outlet pipe (3) is connected to the lower part of one side of the water jet tank (1), and a softened water inlet pipe (4) is connected to the bottom near the water outlet pipe (3). A water jet pump (5) is installed on the water outlet pipe (3). A water jet air ejector (6) is connected to one end of the water outlet pipe (3). The water jet air ejector (6) is connected to a cooling tower (8) through a return water pipe (7). The bottom of the cooling tower (8) is connected to the softened water inlet pipe (4) through a circulation pipe (9) and a circulation pump (10). An overflow pipe (11) is installed on the top of the water jet tank (1). One end of the overflow pipe (11) is connected to the transfer box (2).

2. The waste heat power generation water jetting system according to claim 1, characterized in that, The softened water inlet pipe (4) is also equipped with a spare water inlet pipe (12), and the spare water inlet pipe (12) is equipped with a control valve (13).

3. The waste heat power generation water jetting system according to claim 1, characterized in that, A return pipe (14) is also provided on the lower side of one side of the transfer box (2), and one end of the return pipe (14) is connected to the softened water inlet pipe (4).

4. The waste heat power generation water jetting system according to claim 3, characterized in that, Thermometers (15) are also installed on the water outlet pipe (3), the return pipe (14) and the circulation pipe (9).

5. The waste heat power generation water jetting system according to claim 1, characterized in that, A pressure gauge (16) is also installed on the water outlet pipe (3).

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