High-back-pressure condenser

Abstract

The utility model provides a high-back-pressure condenser, and belongs to the technical field of heat exchangers. The high-back-pressure condenser comprises a main body, a base and an adapter, a water pipe is arranged on the base, the main body comprises a shell, a pipe plate is arranged in the shell, shuttle scrapers are movably arranged in all pipelines of the pipe plate, water chamber covers are movably arranged on the two sides of the shell, and the adapter is connected with the water chamber covers. Each water chamber cover is communicated with the corresponding water pipe through the corresponding adapter, and a driving mechanism is arranged on the base and used for driving the water chamber cover to be opened and closed. In the application, the driving mechanism is utilized to conveniently and quickly open the water chamber cover, and the shuttle scrapers are utilized to scrape and clean the inner walls of all water paths in the tube plate, so that the cleaning efficiency is greatly improved, the cleaning is more thorough, the corrosion of the inner walls of the pipelines is avoided, and the high back pressure and vacuum degree are favorably maintained.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a high back pressure condenser. Background Art

[0002] A condenser is generally installed in a steam turbine unit to condense the steam discharged from the low-pressure cylinder of the steam turbine into water and send it back to the boiler for circulation. The condenser creates a high vacuum at the exhaust port of the steam turbine, causing the steam to expand to the minimum pressure in the steam turbine, increasing the available enthalpy drop of the steam in the steam turbine, and improving the cycle thermal efficiency. Under ideal conditions, when a certain degree of vacuum is formed inside the condenser, the resistance that the discharged steam needs to overcome will become smaller, resulting in a decrease in the pressure inside the condenser. However, when the resistance to the discharged steam becomes smaller, the back pressure will also decrease accordingly, affecting the vacuum level inside the condenser.

[0003] Poor cooling water quality or the growth of organic matter and impurities in the cooling water will cause the inner surface of the condenser cooling water pipe to gradually become dirty or scaled during long-term operation, causing the condenser vacuum to drop and the unit thermal economy to decrease. In severe cases, the unit load will be limited. Therefore, in order to maintain high back pressure and vacuum, the cooling water pipes need to be cleaned regularly. A large number of long water pipes are very difficult to clean. Conventional mechanical cleaning uses machines such as brushes and manual cleaning of scale. The disadvantage is that it takes a long time and is labor-intensive. This method is rarely used. The acid pickling method is used to remove scale and is prone to corrosion of the water pipes. The ventilation and drying method requires opening the water chamber covers on both sides, and air blowing equipment and dust collection equipment need to be installed. The operation is more troublesome and the cleaning is not thorough enough. The backwashing method requires additional pipeline valves and is difficult to clean. Utility Model Content

[0004] In order to make up for the above shortcomings, the present application provides a high back pressure condenser, which aims to improve the problem of difficult cleaning of heat exchange tubes in the condenser mentioned in the above background technology.

[0005] An embodiment of the present application provides a high back-pressure condenser, including a main body, a base and an adapter, wherein a water pipe is arranged on the base, the main body includes a shell, a tube sheet is arranged in the shell, shuttle scrapers are movably arranged in all pipelines of the tube sheet, water chamber covers are movably arranged on both sides of the shell, each of the water chamber covers is connected to the corresponding water pipe through the corresponding adapter, and a driving mechanism is arranged on the base for driving the water chamber cover switch.

[0006] In a specific embodiment, both sides of the tube sheet are movably blocked with a blocking net, and the blocking net is movably blocked from all the shuttle scrapers.

[0007] In the above implementation process, the shuttle scraper moves from one end of the tube sheet to the other end, and the baffle is used to block the shuttle scraper in the tube sheet, so that until all the shuttle scrapers are moved to the baffle, it can be ensured that the shuttle scraper cleans the entire length of the pipeline in the tube sheet.

[0008] In a specific embodiment, the shuttle scraper includes a column and a scraper ring, the scraper ring is axially arrayed on the column, and the scraper ring is slidably connected to the inner wall of the pipeline of the tube sheet.

[0009] In the above implementation process, the scraper ring adopts an open setting, and multiple scraper ring openings are staggered and sleeved on the column, similar to the state of the piston ring of an internal combustion engine sleeved on the piston. The scraper ring is elastic and can fit tightly against the inner wall of the pipeline for cleaning. Hanging rings are provided at both ends of the shuttle scraper so that the shuttle scraper can be hooked out of the tube plate using external hooks and other tools.

[0010] In a specific embodiment, the adapter includes a connecting tube and an axial tube, the connecting tube is fixedly connected to the lower end of the water chamber cover, and the axial tube is fixedly connected to the lower end of the connecting tube.

[0011] In a specific embodiment, the shaft tube is rotatably connected to the base, a core tube is rotatably connected inside the shaft tube, the core tube is fixedly connected to the base, the core tube is connected to the water chamber cover through the shaft tube and the connecting tube, and the core tube is fixedly connected to the water pipe.

[0012] In the above implementation process, the water chamber cover is deflected with the axis of the axial tube, and a through hole is opened on the side wall of the core tube for conducting with the connecting pipe, so that the connection can be maintained during the deflection process to avoid water leakage.

[0013] In a specific embodiment, the driving mechanism includes a worm wheel and a worm, the worm wheel is connected to the shaft tube axis, the worm is rotatably connected to the base, and the worm is meshed with the worm wheel.

[0014] In a specific embodiment, the driving mechanism further includes a motor, the motor is disposed on the base, and the output end of the motor is connected to the worm shaft.

[0015] In the above implementation process, the motor drives the worm to rotate, and then drives the worm wheel to deflect, so that the water chamber cover is opened or closed through the shaft tube and the connecting tube. After the water chamber cover is closed, it still needs to be connected with a bolt flange.

[0016] In a specific embodiment, a reversing valve is provided on the base, and the two water pipes are both connected to the reversing valve.

[0017] In the above implementation process, the reversing valve can change the flow direction of the two water pipes and use cooling water to backwash the pipes in the tube sheet, which can drive the shuttle scraper to move back and forth in the pipe, thereby achieving efficient cleaning of the inner wall of the pipe.

[0018] Compared with the prior art, the beneficial effects of the present application are: the water chamber cover is opened conveniently and quickly by utilizing the driving mechanism, and the inner wall of all water channels in the tube plate is scraped and cleaned by utilizing the shuttle scraper, which greatly improves the cleaning efficiency, makes the cleaning more thorough, avoids corrosion of the inner wall of the pipeline, and is conducive to maintaining high back pressure and vacuum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a first-view schematic diagram of a high back-pressure condenser provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of a high back pressure condenser from a second perspective provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the connection relationship between the adapter and the water chamber cover provided in the embodiment of the present application;

[0023] Figure 4 A schematic diagram of shuttle scraping provided for an embodiment of the present application.

[0024] In the figure: 10-main body; 11-shell; 12-water chamber cover; 13-tube sheet; 14-blocking net; 20-base; 30-adapter; 31-connecting pipe; 32-shaft pipe; 33-core pipe; 40-driving mechanism; 41-worm gear; 42-worm; 43-motor; 50-shuttle scraper; 51-column; 52-scraper ring; 60-water pipe; 70-reversing valve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0026] See also Figure 1-Figure 4The present application provides a high back pressure condenser, including a main body 10, a base 20 and an adapter 30, a water pipe 60 is arranged on the base 20, the main body 10 includes a shell 11, a tube sheet 13 is arranged in the shell 11, and shuttle scrapers 50 are movably arranged in all the pipes of the tube sheet 13, water chamber covers 12 are movably arranged on both sides of the shell 11, each water chamber cover 12 is connected with the corresponding water pipe 60 through the corresponding adapter 30, and a driving mechanism 40 is arranged on the base 20 for driving the water chamber cover 12 to open and close. The driving mechanism 40 is used to conveniently and quickly open the water chamber cover 12, and the shuttle scraper 50 is used to scrape and clean the inner wall of all water channels in the tube sheet 13, which greatly improves the cleaning efficiency, cleans more thoroughly, avoids corrosion of the inner wall of the pipe, and is conducive to maintaining high back pressure and vacuum.

[0027] See also Figure 1-Figure 2 The two sides of the tube sheet 13 are movably blocked with a blocking net 14, and the blocking net 14 movably blocks all the shuttle scrapers 50. The shuttle scrapers 50 move from one end of the tube sheet 13 to the other end, and the blocking net 14 is used to block the shuttle scrapers 50 in the tube sheet 13, so that until all the shuttle scrapers 50 move to the blocking net 14, it can be ensured that the shuttle scrapers 50 clean the entire length of the pipeline in the tube sheet 13.

[0028] See also Figure 2 and Figure 4 The shuttle scraper 50 includes a column 51 and a scraper ring 52. The scraper ring 52 is axially arranged on the column 51 and is slidably connected to the inner wall of the pipe of the tube sheet 13. The scraper ring 52 is set with an opening. The openings of multiple scraper rings 52 are staggered and sleeved on the column 51, similar to the state where the piston ring of an internal combustion engine is sleeved on the piston. The scraper ring 52 is elastic and can be tightly attached to the inner wall of the pipe for cleaning. Hanging rings are set at both ends of the shuttle scraper 50 so that the shuttle scraper 50 can be hooked out of the tube sheet 13 using an external hook or other tool.

[0029] See also Figure 1-Figure 3 The adapter 30 includes a connecting tube 31 and an axle tube 32. The connecting tube 31 is fixedly connected to the lower end of the water chamber cover 12, and the axle tube 32 is fixedly connected to the lower end of the connecting tube 31. The axle tube 32 is rotatably connected to the base 20, and a core tube 33 is rotatably connected inside the axle tube 32. The core tube 33 is fixedly connected to the base 20, and the core tube 33 is connected to the water chamber cover 12 through the axle tube 32 and the connecting tube 31. The core tube 33 is fixedly connected to the water pipe 60. The water chamber cover 12 deflects with the axle tube 32 as the axis, and a through hole is provided on the side wall of the core tube 33 for conducting with the connecting tube 31, so that it can maintain communication during the deflection process to avoid water leakage.

[0030] See also Figure 1-Figure 2The driving mechanism 40 includes a worm wheel 41 and a worm 42. The worm wheel 41 is axially connected to the shaft tube 32. The worm 42 is rotatably connected to the base 20. The worm 42 is meshed with the worm wheel 41. The driving mechanism 40 also includes a motor 43. The motor 43 is arranged on the base 20. The output end of the motor 43 is axially connected to the worm 42. The motor 43 drives the worm 42 to rotate, and then drives the worm wheel 41 to deflect. The water chamber cover 12 is opened or closed through the shaft tube 32 and the connecting tube 31. After the water chamber cover 12 is closed, it still needs to be connected with a bolt flange.

[0031] See also Figure 1-Figure 2 A reversing valve 70 is provided on the base 20, and both water pipes 60 are connected to the reversing valve 70. The reversing valve 70 can change the flow direction of the two water pipes 60, and use cooling water to backwash the pipeline in the tube sheet 13, so that the shuttle scraper 50 can be driven to move back and forth in the pipeline, so as to achieve efficient cleaning of the inner wall of the pipeline.

[0032] The working principle of the high back pressure condenser is: when cleaning is needed, the motor 43 drives the water chamber cover 12 to open through the worm 42 and the worm gear 41, and then the baffle 14 is buckled on the water chamber cover 12, and the shuttle scraper 50 is filled in all the water channels on the tube sheet 13, and then the water chamber cover 12 is closed, and the cooling water circulation is started. Under the action of the cooling water pressure, the shuttle scraper 50 is pushed from one end of the water channel to the other end, and then blocked at the baffle 14, so that all pressure will be concentrated on the shuttle scrapers 50 stuck in the water channel until all A shuttle scraper 50 is pushed to the baffle 14 at one end, and then the reversing valve 70 is operated, the cooling water channel is flipped, and the shuttle scraper 50 will move back, and this process is repeated. Then the water chamber cover 12 is opened, and all the shuttle scrapers 50 and the baffle 14 are removed. In summary, the water chamber cover 12 is opened conveniently and quickly using the driving mechanism 40, and the inner wall of all water channels in the tube plate 13 is scraped and cleaned using the shuttle scraper 50, which greatly improves the cleaning efficiency, makes the cleaning more thorough, avoids corrosion of the inner wall of the pipeline, and is conducive to maintaining high back pressure and vacuum.

[0033] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, improvement or equivalent replacement made within the spirit and principle of the present application shall be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A high back pressure condenser, characterized in that: The invention comprises a main body (10), a base (20) and an adapter (30), wherein a water pipe (60) is arranged on the base (20), the main body (10) comprises a shell (11), a tube sheet (13) is arranged in the shell (11), and shuttle scrapers (50) are movably arranged in all pipelines of the tube sheet (13), water chamber covers (12) are movably arranged on both sides of the shell (11), each of the water chamber covers (12) is connected to the corresponding water pipe (60) through the corresponding adapter (30), and a driving mechanism (40) is arranged on the base (20) for driving the water chamber cover (12) to switch.

2. A high back pressure condenser according to claim 1, characterized in that: Both sides of the tube plate (13) are movably blocked with blocking nets (14), and the blocking nets (14) are movably blocked on all the shuttle scrapers (50).

3. A high back pressure condenser according to claim 1, characterized in that: The shuttle scraper (50) comprises a column (51) and a scraper ring (52). The scraper ring (52) is axially arrayed on the column (51), and the scraper ring (52) is slidably connected to the inner wall of the pipeline of the tube sheet (13).

4. A high back pressure condenser according to claim 3, characterized in that: The adapter (30) comprises a connecting tube (31) and an axle tube (32); the connecting tube (31) is fixedly connected to the lower end of the water chamber cover (12); and the axle tube (32) is fixedly connected to the lower end of the connecting tube (31).

5. A high back pressure condenser according to claim 4, characterized in that: The shaft tube (32) is rotatably connected to the base (20), a core tube (33) is rotatably connected inside the shaft tube (32), the core tube (33) is fixedly connected to the base (20), the core tube (33) is connected to the water chamber cover (12) through the shaft tube (32) and the connecting tube (31), and the core tube (33) is fixedly connected to the water pipe (60).

6. A high back pressure condenser according to claim 5, characterized in that: The driving mechanism (40) comprises a worm wheel (41) and a worm (42); the worm wheel (41) is axially connected to the shaft tube (32); the worm (42) is rotatably connected to the base (20); and the worm (42) is meshed with the worm wheel (41).

7. A high back pressure condenser according to claim 6, characterized in that: The driving mechanism (40) further comprises a motor (43), wherein the motor (43) is arranged on the base (20), and the output end of the motor (43) is connected to the shaft of the worm (42).

8. The high back pressure condenser according to claim 1, characterized in that: A reversing valve (70) is provided on the base (20), and the two water pipes (60) are both connected to the reversing valve (70).

Images