Condensate anti-cavitation pipeline mixer
The condensate anti-cavitation pipeline mixer addresses cavitation issues by mixing high-temperature condensate with cold water to prevent pipeline damage, reducing maintenance and costs through a porous central pipe and concentric reducer design.
Patent Information
- Application Number
- CN202420688063.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-07
AI Technical Summary
Cavitation occurs in steam condensate pipelines due to temperature increases, leading to pipeline damage, vibration, noise, and frequent maintenance needs.
A condensate anti-cavitation pipeline mixer with a porous central pipe, outer pipe, and concentric reducer, which mixes high-temperature condensate with cold water to prevent cavitation by flashing non-condensable gases and adjusting flow rates, while being supported by porous support rings to stabilize the system.
Effectively prevents cavitation, reduces maintenance frequency, saves costs, and maintains pipeline continuity by mixing and cooling condensate, thereby improving operating efficiency and temperature regulation.
Smart Images
Figure CN222151593U_ABST
Abstract
Description
Technical Field
[0001] The utility model patent relates to the field of heat exchange technology, specifically a condensate anti-cavitation pipeline mixer. Background Art
[0002] In the chemical production process, chemical reactions are inevitable, and most of them are exothermic reactions. In order to reduce consumption and save costs, heat exchangers are generally used to fully utilize the heat of reaction. During operation, the condensate with a lower temperature usually enters the heat exchanger and exchanges heat with the high-temperature medium of the reaction. The temperature of the condensate with a lower temperature will rise. When the temperature is too high, the condensate will even vaporize into steam. In order to stabilize the outlet condensate temperature, a shortcut is often used to control the temperature of the steam condensate for reuse. However, at this time, due to the increase in temperature of the condensate with a lower temperature, the gas dissolved in the liquid overflows from the liquid in large quantities, forming many small bubbles of a mixture of steam and gas. When the shortcut valve is opened, the low-temperature condensate enters the tee where the pressure is the lowest (such as Figure 1 ), when the pressure of the liquid in this place is equal to or lower than the vaporization pressure of the liquid at this temperature, steam and gas dissolved in the liquid will overflow from the liquid in large quantities, forming many small bubbles of steam and gas mixture. When these small bubbles flow to the high-pressure area with the liquid, the pressure around the bubbles is higher than the pressure inside the bubbles. The bubbles are compressed and burst (condensed), and the bubbles are compressed and burst to continuously hit the metal surface, causing damage to the metal surface. This is often called cavitation. When cavitation occurs, the steam condensate pipeline will simultaneously generate vibration and noise. After a period of time, the pipeline will corrode and fatigue and leak, and it has to be stopped for inspection.
[0003] Therefore, reducing the occurrence of cavitation in the steam condensate pipeline is the key to the stable operation of the steam condensate pipeline, reducing maintenance costs, reducing consumption, and saving costs. Based on this, the present application proposes a condensate pipeline mixer that can effectively and conveniently install, can well solve the cavitation problem of the steam condensate pipeline, and is simple to operate and practical. Utility Model Content
[0004] The utility model aims to provide a condensate anti-cavitation pipeline mixer to solve the problem that when the condensate temperature of the existing heat exchanger is too high, cavitation is easy to occur on the pipeline, and frequent shutdown for maintenance is required.
[0005] The utility model is realized by the following technical solutions:
[0006] A condensate anti-cavitation pipeline mixer comprises a porous central pipeline, wherein holes are arranged in the rear half of the porous central pipeline, an outer pipeline is arranged outside the porous central pipeline, one end of the outer pipeline is sealedly connected to the outer surface of the non-hole end of the porous central pipeline, and the other end is connected to a concentric reducer, a cold water inlet is arranged at the lower part of the outer pipeline, and an exhaust hole with an exhaust valve is arranged at the upper part of the outer pipeline.
[0007] The condensate anti-cavitation pipeline mixer disclosed in the utility model forms a mixing space for high-temperature condensate and cold water through a porous central pipeline and an outer pipeline, so that the high-temperature condensate and cold water are fully mixed and cooled here, and the non-condensable gas is flashed and resolved, and then discharged through the exhaust hole, thereby effectively avoiding the cavitation effect on the pipeline. In addition, the design of the concentric reducer can adjust the flow rate, flow rate and pressure of the mixed liquid, reduce the impact and noise of the condensate, will not produce obvious flow changes and energy losses at the interface, can maintain the continuity of the pipeline, and can also reduce the pressure drop of the fluid.
[0008] As a further configuration of the above solution, a porous support ring is provided between the inner wall of the outer pipe and the outer wall of the porous central pipe.
[0009] As a further configuration of the above solution, two porous support rings are provided, one is provided at the front half of the porous central pipe, and the other is provided at the rear half of the porous central pipe.
[0010] The porous support ring can not only stably support the porous central pipe for the supporting component to prevent the porous central pipe from vibrating and twisting, but also firmly fix the porous central pipe in the outer pipe. In addition, the porous support ring can balance the potential energy of the porous central pipe and the entire mixer, reduce the load on the mixer, and protect it from excessive external force damage.
[0011] As a further configuration of the above solution, the cold water inlet is arranged at a lower portion close to the sealed end of the outer pipe, and the exhaust hole is arranged at an upper portion close to the sealed end of the outer pipe.
[0012] As a further configuration of the above solution, the porous central pipe is concentrically arranged with the outer pipe. Beneficial Effects
[0013] The condensate anti-cavitation pipeline mixer disclosed by the utility model is not only simple to process and install, and can be quickly connected to the heat exchanger for use, but also has great operational flexibility and can more effectively avoid the occurrence of cavitation of the condensate, while improving the operating efficiency of the steam condensate and facilitating temperature regulation, thereby reducing consumption, saving costs, and preventing the problem of frequent leakage and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0015] Figure 1 It is a schematic diagram of the principle of the existing heat exchanger;
[0016] Figure 2 It is a schematic diagram of the planar structure of the utility model. DETAILED DESCRIPTION
[0017] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figure 1~2 , and describes the application in detail with reference to embodiments. Example 1
[0019] Example 1 discloses a condensate anti-cavitation pipeline mixer, see attached Figure 2 , comprising a porous central pipe 1 connected to the outlet end of the high-temperature condensate, and the holes are arranged in the rear half of the porous central pipe 1. An outer pipe 2 is arranged concentrically outside the porous central pipe 1, one end of the outer pipe 2 is sealedly connected to the outer surface of the non-porous end of the porous central pipe 1, and the other end is connected to a concentric reducer 3, and the outer end of the concentric reducer 3 serves as the water outlet end.
[0020] A cold water inlet 201 is provided at the lower part near the sealed end of the outer pipe 2, and an exhaust hole is provided at the upper part near the sealed end of the outer pipe 2, and an exhaust valve 202 is provided on the exhaust hole. In addition, a plurality of porous support rings 4 are installed between the inner wall of the outer pipe 2 and the outer wall of the porous central pipe 1. In this embodiment, two porous support rings 4 are provided, one is provided at the front half of the porous central pipe 1, and the other is provided at the rear half of the porous central pipe 1.
[0021] During the use of the condensate anti-cavitation pipeline mixer disclosed in this embodiment 1, when the temperature of the condensate discharged from the heat exchanger is too high, cold water is added to the outer pipeline 2 from the cold water inlet 201. At this time, the high-temperature condensate is first cooled by the front half of the porous central pipeline 1 according to the heat conduction principle, and then mixed with cold water through the holes on the back half of the porous central pipeline 1 to achieve cooling, thus avoiding rapid temperature changes and reducing thermal stress. At the same time, in the process of mixing the high-temperature condensate with cold water, non-condensable gas will flash and resolve, and at this time, the non-condensable gas can be effectively discharged from the entire pipeline mixer through the exhaust hole and the exhaust valve 202, reducing the cavitation of the pipeline.
[0022] The design of the concentric reducer 3 in this embodiment can deliver the mixed condensate without being affected by corrosion, pitting, erosion or wear, while changing the flow rate, flow rate and pressure of the mixed liquid, reducing the impact and noise of the condensate, and will not produce obvious flow changes and energy losses at the interface. It can maintain the continuity of the pipeline and reduce the pressure drop of the fluid.
[0023] In addition, the porous support ring 4 as a supporting component can stably support the porous central pipe 1, prevent the porous central pipe 1 from vibrating and twisting, and can also firmly fix the porous central pipe 1 in the outer pipe 2. In addition, the porous support ring 4 can balance the potential energy of the porous central pipe 1 and the entire mixer, reduce the load on the mixer, and protect it from excessive external force damage.
[0024] The condensate anti-cavitation pipeline mixer disclosed in this embodiment 1 is not only simple to process and install, but also has great operational flexibility. It can more effectively avoid the occurrence of cavitation of the condensate, while improving the operating efficiency of the steam condensate and facilitating temperature regulation, thereby reducing consumption, saving costs, and preventing the problem of frequent leakage and maintenance.
[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A condensate anti-cavitation pipeline mixer, It is characterized in that It comprises a porous central pipe, and holes are arranged in the rear half of the porous central pipe, an outer pipe is arranged outside the porous central pipe, one end of the outer pipe is sealed and connected to the outer surface of the non-hole end of the porous central pipe, and the other end is connected to a concentric reducer, a cold water inlet is arranged at the lower part of the outer pipe, and an exhaust hole with an exhaust valve is arranged at the upper part of the outer pipe.
2. A condensate anti-cavitation pipeline mixer according to claim 1, It is characterized in that A porous support ring is arranged between the inner wall of the outer pipe and the outer wall of the porous central pipe.
3. A condensate anti-cavitation pipeline mixer according to claim 2, It is characterized in that There are two porous support rings, one is arranged at the front half of the porous central pipe, and the other is arranged at the rear half of the porous central pipe.
4. The condensate anti-cavitation pipeline mixer according to claim 1, It is characterized in that The cold water inlet is arranged at the lower part close to the sealing end of the outer pipe, and the exhaust hole is arranged at the upper part close to the sealing end of the outer pipe.
5. The condensate anti-cavitation pipeline mixer according to claim 1, It is characterized in that The porous central pipe is arranged concentrically with the outer pipe.