Condenser negative pressure continuous flushing device
By optimizing the condenser piping layout and control logic, continuous negative pressure flushing is achieved, solving the problems of low flushing efficiency, high energy consumption, and unstable water quality in traditional condensers, thus realizing efficient and stable water quality management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional condenser flushing methods are inefficient, labor-intensive, energy-intensive, and produce unstable water quality, making it difficult to meet the needs of efficient water quality management.
A condenser negative pressure continuous flushing device is designed. By optimizing the pipeline layout and control logic, continuous steam intake and sewage discharge are achieved, ensuring automated operation under negative pressure environment.
It significantly shortens rinsing time, reduces labor intensity and energy consumption, increases the speed of water quality compliance, and improves rinsing efficiency and water quality stability.
Smart Images
Figure CN224080841U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of condenser technology, specifically a condenser negative pressure continuous flushing device, which is suitable for negative pressure continuous flushing devices for adding series condensers or pre-condensers after the air-cooled island is modified. Background Technology
[0002] In the technical renovation of air-cooled islands, after installing series condensers or pre-condensers, the new system needs to be thoroughly flushed to remove impurities such as welding slag and rust from the pipes, ensuring that the condensate water quality meets recycling standards. Traditional flushing methods employ intermittent operation, with the specific process as follows:
[0003] Start the cooling water supply and open the vacuum valve to establish negative pressure; open the exhaust steam inlet valve to raise the condensate water level to a high level; close the steam inlet valve and vacuum valve, and open the vacuum breaker valve to release the negative pressure; open the drain valve to discharge wastewater, and repeat the above steps until the water quality meets the standards.
[0004] However, traditional methods have the following drawbacks:
[0005] Low rinsing efficiency: Each rinsing session is short and requires multiple repetitions.
[0006] High labor intensity: It requires frequent opening and closing of multiple valves and relies on manual monitoring of water level and water quality;
[0007] High energy consumption: Each flush requires re-establishing negative pressure, increasing steam consumption;
[0008] Unstable water quality: Intermittent rinsing can easily lead to the residue of impurities, resulting in large fluctuations in the quality of recycled water.
[0009] To address the aforementioned problems, this invention proposes a negative pressure continuous flushing device, which achieves full automation and continuity of the flushing process by optimizing the pipeline layout and control logic. Utility Model Content
[0010] This utility model aims to provide a condenser negative pressure continuous flushing device, which solves the problems of low efficiency, high energy consumption and complicated operation of traditional flushing methods by maintaining continuous steam intake and sewage discharge under negative pressure environment, significantly improving the speed of water quality compliance and reducing manual intervention.
[0011] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:
[0012] A condenser negative pressure continuous flushing device, comprising:
[0013] The condenser body has an exhaust steam inlet electric valve on its side wall, a cooling water inlet and a cooling water return outlet on its top, and a drain pipe connected to its bottom.
[0014] A vacuum generation assembly includes a vacuum pump and a vacuum electric valve. The vacuum pump is connected to the condenser body via a pipe, and the vacuum electric valve is installed on the connecting pipe between the vacuum pump and the condenser body.
[0015] The sewage control component includes a sewage valve and a sewage pipe. The sewage valve is installed at the bottom of the sewage pipe. The vertical height H of the sewage pipe satisfies the relationship: P0-P1<γH-0.1m, where P0 is the local atmospheric pressure, P1 is the vacuum value inside the condenser, γ is the water density, and H is the vertical distance from the outlet of the sewage pipe to the bottom of the condenser body.
[0016] Furthermore, the drain pipe extends downward from the bottom of the condenser body, and a vacuum shut-off valve is also provided on the drain pipe, which is located between the condenser body and the drain valve.
[0017] Furthermore, the sewage pipe bends upwards downstream of the sewage valve to form a U-shaped section, and an isolation valve is installed on the U-shaped section.
[0018] Furthermore, it also includes an exhaust drainage pipe, which is connected to the end of a sewage pipe for discharging drainage and gas.
[0019] Furthermore, the isolation valve is used to block the backflow between the sewage pipe and the exhaust condensate pipe.
[0020] Furthermore, the sewage pipe is a seamless steel pipe with an inner diameter of 150 mm and an absolute roughness ε≤0.01 mm.
[0021] Compared with the prior art, the condenser negative pressure continuous flushing device of this application has the following beneficial technical effects:
[0022] This device optimizes the structure of the condenser piping system to achieve continuous flushing under negative pressure, significantly shortening the flushing time and reducing labor intensity. It is suitable for industrial scenarios requiring efficient water quality management, such as thermal power plants and chemical plants. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of a condenser negative pressure continuous flushing device according to this application.
[0025] Explanation of the labels in the diagram:
[0026] 1. Condenser body; 2. Exhaust steam inlet electric valve; 3. Cooling water inlet; 4. Cooling water return outlet; 5. Drain pipe; 6. Vacuum electric valve; 7. Drain valve; 8. Vacuum shut-off valve; 9. Isolation valve; 10. Exhaust condensate drain pipe. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0028] See Figure 1 This application discloses a condenser negative pressure continuous flushing device, comprising:
[0029] The condenser body 1 has a waste steam inlet electric valve 2 on its side wall, which is connected to the waste steam inlet. The top is provided with a cooling water inlet 3 and a cooling water return inlet 4, and the bottom is connected to a drain pipe 5. Optionally, the condenser body 1 can be a series condenser or a pre-condenser.
[0030] A vacuum generation assembly includes a vacuum pump and a vacuum electric valve 6. The vacuum pump is connected to the condenser body 1 via a pipe, and the vacuum electric valve 6 is installed on the connecting pipe between the vacuum pump and the condenser body 1. Figure 1 Not shown, a conventional vacuum pump in this field can be used.
[0031] The sewage control component includes a sewage valve 7 and a sewage pipe 5. The sewage valve 7 is installed at the bottom of the sewage pipe 5. The vertical height H of the sewage pipe 5 satisfies the following relationship: P0 - P1 < γH - 0.1m, where P0 is the local atmospheric pressure, P1 is the vacuum value inside the condenser, γ is the water density, and H is the vertical distance from the outlet of the sewage pipe 5 to the bottom of the condenser body 1.
[0032] The focus of this invention is to solve the problem of continuous sewage discharge in negative pressure systems. In one embodiment of this application, the aim is to solve this problem. The specific steps are as follows:
[0033] First, the local atmospheric pressure P0 and the vacuum value P1 need to be determined. Simultaneously, the water level height H from the drain pipe to the series condenser or pre-condenser must be determined, ensuring that the relationship P0 - P1 < γH - 0.1m is satisfied. The calculation process involves some fluid mechanics formulas, such as Darcy's formula ΔP = f (L / d) (v² / (2g)), this formula applies to the case of full flow in a circular pipe, where f is the friction coefficient, L is the pipe length, d is the pipe diameter, v is the flow velocity, and g is the acceleration due to gravity.
[0034] The friction factor λ depends on the Reynolds number Re and the relative roughness ε / d of the pipe. The Reynolds number Re = ρvD / μ. When Re is less than 2300, it is laminar flow, and in this case, λ = 64 / Re. In this embodiment, a vertical new seamless steel pipe is used, with an absolute roughness ε of 0.01 mm. The calculated relative roughness of the pipe is approximately 0.1 mm.
[0035] In this embodiment, the calculation point is set at the lowest back pressure of the air-cooled unit > 6 kPa, the local atmospheric pressure is 90.2 kPa, and the pipe height is 7.9 + 4.3 = 12.2 m. This fully meets the numerical requirement of P0 - P1 < γH - 0.1 m.
[0036] Based on the above conditions, this device can achieve continuous steam intake for series condensers or pre-condensers while simultaneously performing continuous blowdown flushing. This design yields significant results, halving the flushing time and reducing steam consumption, effectively improving the device's operating efficiency and economy.
[0037] See also Figure 1 In the embodiments of this application, the drain pipe 5 extends downward from the bottom of the condenser body 1, and the drain pipe 5 is also provided with a vacuum shut-off valve 8, which is located between the condenser body 1 and the drain valve 7.
[0038] In an embodiment of this application, the sewage pipe 5 bends upwards downstream of the sewage valve 7 to form a U-shaped section, and an isolation valve 9 is installed on the U-shaped section.
[0039] In embodiments of this application, an exhaust drainage pipe 10 is also included, which is connected to the end of the sewage pipe 5 and is used to discharge drainage and gas.
[0040] In an embodiment of this application, the isolation valve 9 is used to block the reverse backflow between the sewage pipe 5 and the exhaust condensate pipe 10.
[0041] In the embodiments of this application, the sewage pipe 5 is a seamless steel pipe with an inner diameter of 150 mm and an absolute roughness ε≤0.01 mm.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A condenser negative pressure continuous flushing device, characterized in that, include: The condenser body (1) has a waste steam inlet electric valve (2) on its side wall, a cooling water inlet (3) and a cooling water return outlet (4) on its top, and a drain pipe (5) at its bottom. The vacuum generating component includes a vacuum pump and a vacuum electric valve (6), wherein the vacuum pump is connected to the condenser body (1) via a pipe, and the vacuum electric valve (6) is installed on the connecting pipe between the vacuum pump and the condenser body (1). The sewage control component includes a sewage valve (7) and a sewage pipe (5). The sewage valve (7) is installed at the bottom of the sewage pipe (5). The vertical height H of the sewage pipe (5) satisfies the following relationship: P0 - P1 < γH - 0.1m, where P0 is the local atmospheric pressure, P1 is the vacuum value inside the condenser, γ is the water density, and H is the vertical distance from the outlet of the sewage pipe (5) to the bottom of the condenser body (1).
2. The condenser negative pressure continuous flushing device according to claim 1, characterized in that, The drain pipe (5) extends downward from the bottom of the condenser body (1), and a vacuum shut-off valve (8) is also provided on the drain pipe (5). The vacuum shut-off valve (8) is located between the condenser body (1) and the drain valve (7).
3. The condenser negative pressure continuous flushing device according to claim 2, characterized in that, The sewage pipe (5) bends upwards downstream of the sewage valve (7) to form a U-shaped section, and an isolation valve (9) is installed on the U-shaped section.
4. The condenser negative pressure continuous flushing device according to claim 1, characterized in that, It also includes an exhaust drainage pipe (10), which is connected to the end of the sewage pipe (5) for discharging drainage and gas.
5. The condenser negative pressure continuous flushing device according to claim 3, characterized in that, The isolation valve (9) is used to block the backflow between the sewage pipe (5) and the exhaust condensate pipe (10).
6. The condenser negative pressure continuous flushing device according to claim 1, characterized in that, The sewage pipe (5) is a seamless steel pipe with an inner diameter of 150 mm and an absolute roughness ε≤0.01 mm.