Boiler steam-water separation system

Abstract

The invention discloses a boiler steam-water separation system which comprises a separation mechanism, the separation mechanism comprises a shell, a sealing circular plate is horizontally arranged in the shell and divides the shell into an upper exhaust space and a lower separation space, and a connecting cylinder is arranged on the sealing circular plate in a penetrating mode; the connecting cylinder is fixedly connected with the sealing circular plate, the outer side of the part, located below the sealing circular plate, of the connecting cylinder is fixedly connected with a spiral flow guide plate, the inner top of the shell is rotationally connected with a rotating shaft, the lower end of the rotating shaft penetrates through the connecting cylinder, and a separation silk screen penetrates through the rotating shaft; and the upper end of the separation silk screen is in contact with the lower end surface of the connecting cylinder. In actual use of the separation system, the separation effect is improved in a double separation mode that centrifugal separation is matched with silk screen separation, and in addition, a flowing water film can be arranged in the bottom of the separation shell to be matched with flowing of a water body at the bottom, so that the forming possibility of scale can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of boiler steam-water separation, and in particular to a boiler steam-water separation system. Background Art

[0002] During boiler operation, steam-water separation is a key step in ensuring safe and efficient boiler operation. Accurate and efficient steam-water separation not only improves steam quality and meets the steam purity requirements of subsequent processes, but also reduces scale formation, reduces boiler energy consumption, and extends equipment life.

[0003] At present, the traditional boiler steam-water separation method is relatively simple, mostly using single centrifugal separation or wire mesh separation technology. The single centrifugal method has limited separation effect;

[0004] In addition, during the steam-water separation process, the separated water is prone to secondary atomization when it hits the dry inner wall of the separator, causing some water droplets to re-enter the steam, further reducing the separation effect. At the same time, the water is prone to scale formation when it stays still at the bottom of the separator for a long time. When the scale accumulates to a certain extent, it will affect the operation of the separation system, causing the staff to clean the scale regularly and frequently, increasing the actual workload. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose a boiler steam-water separation system. In actual use, the separation system utilizes a dual separation method of centrifugal separation combined with wire mesh separation to improve the separation effect. In addition, a flowing water film can be set at the bottom inside of the separation shell to cooperate with the flow of the bottom water body to reduce the possibility of scale formation. At the same time, the separated water body can be captured to avoid the secondary atomization of the water body hitting the dry inner wall.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The cam is secured to the bottom of the watertight seal and is adapted to engage the cam's upper and lower ends of the watertight seal.

[0008] Preferably, a plurality of supporting legs are installed at the lower end of the shell, an inlet pipe is connected to the left side of the shell, and an exhaust pipe is provided on the right side of the shell.

[0009] Preferably, the inlet pipe is communicated with the top space of the separation space, and the exhaust pipe is communicated with the exhaust space.

[0010] Preferably, a temporary storage box is provided below the shell, the inner top of the temporary storage box is connected to the inner bottom of the shell through a downpipe, the inner bottom of the temporary storage box is connected to a drain pipe, a normally closed solenoid valve is installed inside the downpipe, and a normally open solenoid valve is installed inside the drain pipe.

[0011] Preferably, a U-shaped scraper strip is fixedly connected to the side wall of the bottom portion of the connecting cylinder, and the upper end of the lower horizontal portion of the U-shaped scraper strip is in contact with the separation screen and is slidably connected thereto.

[0012] Preferably, the stirring mechanism includes two guide cylinders fixedly connected to the left side of the lower end of the rotating shaft, and sliding blocks that can slide left and right are provided in the two guide cylinders. The right side of one of the sliding blocks is elastically connected to the inner wall of the corresponding guide cylinder through a spring, and the left sides of the two sliding blocks are fixedly connected to fixed rods, and the left ends of the two fixed rods are commonly fixedly connected to a folding scraper.

[0013] Preferably, the water film forming mechanism includes a piston plate symmetrically fixedly connected to the piston cylinder, and the two piston cylinders are each provided with a piston plate that can slide left and right. The two piston plate-cylinder connecting rods are fixedly connected, and the upper end of the rotating shaft is fixedly connected to a rotating disk. The upper end of the rotating disk is eccentrically connected to a linkage rod, and the other end of the linkage rod is rotatably connected to the right side of the left piston plate.

[0014] Preferably, an annular cavity is provided in the inner wall of the shell, and an annular groove connected to the annular cavity is opened on the inner wall of the shell, the opposite side spaces of the two piston cylinders are connected with a first one-way tube and a second one-way tube, the other ends of the two first one-way tubes are commonly connected with a first connecting tube, the other end of the first connecting tube is connected with the inner bottom space of the shell, the other ends of the two second one-way tubes are commonly connected with a second connecting tube, the other end of the second connecting tube is connected with the annular cavity, and a one-way valve is installed inside each of the first one-way tube and the second one-way tube, the one-way valve inside the first one-way tube flows in a one-way direction for the first connecting tube to enter the piston cylinder in one direction, and the one-way valve inside the second one-way tube flows in a one-way direction for the piston cylinder to enter the annular cavity in one direction.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. After the water-containing steam is guided by the spiral guide plate, centrifugal force causes the water and gas to initially separate. As the steam moves upward, it is captured by the separation screen, achieving double separation. This dual separation method can effectively improve separation efficiency and significantly enhance steam quality, meeting the pure steam requirements of subsequent processes.

[0017] 2. The drive motor drives the shaft, causing the separation screen to rotate. Centrifugal force throws part of the water adhering to the inner wall of the housing, while the remaining part is scraped off by the U-shaped scraper. This cleans the separation screen in a timely manner, preventing the water from being swept away again by the high-speed airflow, ensuring the separation screen continues to work efficiently and guaranteeing the separation effect.

[0018] 3. Intelligent control of the water level inside the shell is achieved through the coordination of the liquid level sensor, controller, and solenoid valve. When the water level is higher than the upper sensor, the water is temporarily stored, and when it is lower than the lower sensor, it is discharged. At the same time, water is ensured at the bottom to maintain the operation of the water film forming mechanism, ensuring stable operation of the system and improving overall reliability.

[0019] 4. The rotation of the shaft drives the folded scraper, which, at normal speed, does not contact the inner wall of the shell and only stirs the water at the bottom to keep it in motion. This effectively prevents scale formation, reduces maintenance frequency, and reduces the risk of reduced heat transfer efficiency and equipment damage caused by scale accumulation.

[0020] 5. The rotation of the shaft drives the piston plate to move, causing the water to form a flowing water film on the inner wall of the shell. When the water separated by centrifugal force hits the water film, it "sticks" and flows down the wall, avoiding impact atomization and reducing secondary entrainment. The separation effect is particularly significant for small droplets, further improving separation quality.

[0021] 6. The water film forming mechanism further promotes the flow of water at the bottom of the shell, thereby further reducing the possibility of scale formation.

[0022] In summary, compared with the existing technology, this separation system uses double separation combined with water film capture to effectively improve the separation effect. In addition, the flow of water at the bottom of the shell effectively reduces the possibility of scale formation and reduces the overall maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a boiler steam-water separation system proposed by the present invention;

[0024] Figure 2 It is a structural diagram of the driving mechanism;

[0025] Figure 3 for Figure 2 Schematic cross-sectional view of ;

[0026] Figure 4 for Figure 1 Schematic cross-sectional view of ;

[0027] Figure 5 for Figure 4 Schematic diagram of the front structure;

[0028] Figure 6 It is a structural diagram of the rotating shaft, the separation screen and the stirring mechanism;

[0029] Figure 7 for Figure 6 Front view schematic diagram of the cross-sectional structure.

[0030] In the figure: 1 housing, 2 supporting feet, 3 inlet pipe, 4 exhaust pipe, 5 piston cylinder, 6 first one-way pipe, 7 first connecting pipe, 8 second one-way pipe, 9 second connecting pipe, 10 mounting frame, 11 driving motor, 12 first gear, 13 second gear, 14 rotating disk, 15 connecting rod, 16 rotating shaft, 17 piston plate, 18 linkage rod, 19 annular cavity, 20 annular groove, 21 connecting cylinder, 22 sealing circular plate, 23 separating screen, 24 temporary storage box, 25 liquid drop pipe, 26 normally closed solenoid valve, 27 drain pipe, 28 normally open solenoid valve, 29 U-shaped scraper, 30 spiral guide plate, 31 guide cylinder, 32 folding scraper, 33 fixing rod, 34 sliding block, 35 spring. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] Reference Figure 1-Figure 7A boiler steam-water separation system includes a separation mechanism, which includes a shell 1. In the initial state, there is a part of water at the bottom of the shell 1 to ensure the operation of the subsequent water film forming mechanism. A sealing circular plate 22 is horizontally arranged in the shell 1. The sealing circular plate 22 separates the shell 1 into an exhaust space above and a separation space below. A connecting cylinder 21 is penetrated by the sealing circular plate 22. The connecting cylinder 21 is fixedly connected to the sealing circular plate 22. The outer side of the connecting cylinder 21 located below the sealing circular plate 22 is fixedly connected with a spiral guide plate 30. The inner top of the shell 1 is rotatably connected to a rotating shaft 16. The lower end of the rotating shaft 16 penetrates the connecting cylinder 21. The rotating shaft 16 A separation screen 23 is provided through the upper portion, and the upper end of the separation screen 23 contacts the lower end surface of the connecting tube 21. When the water-containing steam enters from the inlet pipe 3 on the left, it will be guided by the spiral guide plate 30 and will move downward in a rotating manner. Under the action of centrifugal force, the water with higher density will be separated from the gas and contact the inner wall of the bottom part of the shell 1, and finally slide to the bottom of the shell 1, while the gas will continue to move and finally move upward along the connecting tube 21, enter the exhaust space and be discharged from the exhaust pipe 4. During the upward movement, the gas contacts the separation screen 23, further capturing the water in the gas, and utilizing double separation to improve the separation efficiency.

[0033] As an embodiment of the present invention, a plurality of supporting legs 2 are installed at the lower end of the shell 1, an inlet pipe 3 is connected to the left side of the shell 1, and an exhaust pipe 4 is provided on the right side of the shell 1. The inlet pipe 3 is connected to the top space of the separation space, and the exhaust pipe 4 is connected to the exhaust space.

[0034] As an embodiment of the present invention, it also includes a driving mechanism, which includes a mounting frame 10 fixedly connected to the upper end of the shell 1 and installed on the upper end of the shell 1, a driving motor 11 is installed on the mounting frame 10, and the output shaft of the driving motor 11 is fixedly connected to the first gear 12, the upper end of the rotating shaft 16 extends to the outside and is installed with a second gear 13, the first gear 12 is meshed with the second gear 13, and a U-shaped scraper 29 is fixedly connected to the side wall of the bottom part of the connecting cylinder 21, and the upper end of the lower horizontal part of the U-shaped scraper 29 contacts the separation screen 23 and is slidably connected. In this way, the separation screen 23 is in a rotating state when in use, and a part of the water captured thereon is thrown into contact with the inner wall of the shell 1 by centrifugal force, while the other part is scraped by the upper end of the lower horizontal part of the U-shaped scraper 29 to gather together and fall under the action of gravity, so as to achieve the purpose of timely shedding of droplets. The droplets that fall off in time can avoid being swept away again by the high-speed airflow, thereby further improving the separation effect.

[0035] As an embodiment of the present invention, a temporary storage box 24 is provided below the shell 1, and the inner top of the temporary storage box 24 is connected to the inner bottom of the shell 1 through a downpipe 25. The inner bottom of the temporary storage box 24 is connected to a drain pipe 27. A normally closed solenoid valve 26 is installed inside the downpipe 25, and a normally open solenoid valve 28 is installed inside the drain pipe 27. A controller and two liquid level sensors not shown in the figure are also provided here. The two liquid level sensors are installed on the inner wall of the bottom part of the shell 1. The two liquid level sensors are arranged from top to bottom. When When the water level inside the shell 1 is higher than the liquid level sensor above, the controller controls the normally open solenoid valve 28 and the normally closed solenoid valve 26 to be energized. At this time, the water inside the shell 1 falls into the temporary storage tank 24. When the liquid level at the bottom of the shell 1 is lower than the liquid level sensor below, the controller controls the normally open solenoid valve 28 and the normally closed solenoid valve 26 to be de-energized, and the water in the temporary storage tank 24 is discharged through the drain pipe 27. It should be noted that there must always be a part of water at the bottom of the shell 1 to ensure the operation of the water film forming mechanism.

[0036] As an embodiment of the present invention, it also includes a stirring mechanism, which is used to promote the fluidity of the bottom water body. The stirring mechanism includes two guide cylinders 31 fixedly connected to the left side of the lower end of the rotating shaft 16. A sliding block 34 that can slide left and right is provided in each of the two guide cylinders 31. The right side of one of the sliding blocks 34 is elastically connected to the inner wall of the corresponding guide cylinder 31 through a spring 35. The left sides of the two sliding blocks 34 are fixedly connected to a fixed rod 33. The left ends of the two fixed rods 33 are fixedly connected to a folding scraper 32. During the water vapor separation process, the rotation of the rotating shaft 16 can be controlled by the guide cylinder 31, the sliding block 34 and the fixed rod 33. Let the folding scraper 32 rotate. At this time, the speed is not too large, so under the action of centrifugal force and the elasticity of the spring 35, the folding scraper 32 will not contact the inner wall of the shell 1, so as to avoid damaging the water film. The rotation here only stirs the water at the bottom of the shell 1, so that the water is in motion, it is not easy to form scale, and the maintenance frequency is reduced. After long-term use, if scale appears, it is only necessary to add water and scale remover into the shell 1, and then start the drive motor 11 to rotate at high speed. Under the action of centrifugal force, the folding scraper 32 will not contact the inner wall of the shell 1, so as to achieve the scraping effect and facilitate the scale removal operation.

[0037] As an embodiment of the present invention, it also includes a water film forming mechanism, which is used to improve the steam-water separation effect. The water film forming mechanism includes a piston plate 17 symmetrically fixedly connected to the piston cylinder 5, and the two piston cylinders 5 are each provided with a piston plate 17 that can slide left and right. The two piston plates 17 are fixedly connected to the cylinder connecting rod 15, and the upper end of the rotating shaft 16 is fixedly connected to the rotating disk 14. The upper end of the rotating disk 14 is eccentrically connected to the linkage rod 18, and the other end of the linkage rod 18 is rotatably connected to the right side of the left piston plate 17. An annular cavity 19 is provided in the inner wall of the shell 1, and an annular groove 20 connected to the annular cavity 19 is opened on the inner wall of the shell 1. The opposite side spaces of the two piston cylinders 5 are connected with a first one-way tube 6 and a second one-way tube 8, and the other ends of the two first one-way tubes 6 are connected together. It is connected with a first connecting pipe 7, the other end of which is connected with the inner bottom space of the shell 1, and the other ends of the two second one-way tubes 8 are commonly connected with a second connecting pipe 9, the other end of the second connecting pipe 9 is connected with the annular cavity 19, and a one-way valve is installed inside each of the first one-way tube 6 and the second one-way tube 8. The one-way valve inside the first one-way tube 6 flows in a one-way direction for the first connecting pipe 7 to enter the piston cylinder 5 in one direction, and the one-way valve inside the second one-way tube 8 flows in a one-way direction for the piston cylinder 5 to enter the annular cavity 19 in one direction. When there is a water film on the inner wall, water droplets hitting the water film in the air flow will be directly "adhered" and flow down the wall with the water film, reducing secondary entrainment. Compared with the dry inner wall, the water film is equivalent to a "capture layer", which can more efficiently intercept water droplets, especially the separation effect of small particle size droplets is more obvious.

[0038] In the present invention, water-containing vapor enters the separation space of shell 1 through inlet pipe 3. After being guided by spiral guide plate 30, the vapor moves downward in a rotating manner. Under the action of centrifugal force, the denser water separates from the gas and strikes the inner wall of the bottom portion of shell 1, eventually sliding to the bottom of shell 1. The vapor continues to move upward along connecting tube 21 into the exhaust space. During this upward movement, the vapor contacts separation screen 23, which further captures the water in the vapor, achieving double separation and improving separation efficiency.

[0039] During this process, the drive motor 11 is activated, and its output shaft rotates the first gear 12. The first gear 12, in turn, meshes with the second gear 13, driving the rotating shaft 16, which in turn rotates the separation screen 23. A portion of the water trapped on the separation screen 23 is thrown by centrifugal force into contact with the inner wall of the housing 1. The remaining portion is scraped by the upper end of the lower horizontal portion of the U-shaped scraper 29, gathering together and falling due to gravity, thereby preventing it from being swept away again by the high-speed airflow, further improving the separation effect.

[0040] When the water level inside the shell 1 is higher than the upper liquid level sensor, the controller controls the normally open solenoid valve 28 and the normally closed solenoid valve 26 to be energized, and the water inside the shell 1 falls into the temporary storage tank 24 through the downpipe 25; when the liquid level at the bottom of the shell 1 is lower than the lower liquid level sensor, the controller controls the normally open solenoid valve 28 and the normally closed solenoid valve 26 to be de-energized, and the water in the temporary storage tank 24 is discharged through the drain pipe 27, while ensuring that there is always a portion of water at the bottom of the shell 1 to ensure the operation of the water film forming mechanism;

[0041] When the shaft 16 rotates, the folding scraper 32 is driven to rotate via the guide cylinder 31, the sliding block 34, and the fixed rod 33. At normal operating speeds, the folding scraper 32 does not contact the inner wall of the housing 1 due to centrifugal force and the elasticity of the spring 35. It only stirs the water at the bottom of the housing 1, keeping the water in motion, preventing scale from forming, and reducing maintenance frequency.

[0042] The rotation of the rotating shaft 16 also drives the rotating disk 14 to rotate. The rotating disk 14 drives the left piston plate 17 to reciprocate left and right through the linkage rod 18. The left piston plate 17 drives the right piston plate 17 to move synchronously through the connecting rod 15. Taking the right piston cylinder 5 as an example, when the piston plate 17 moves to the left, a negative pressure is formed in the space on the right side of the piston cylinder 5, and the water at the bottom of the shell 1 enters the piston cylinder 5 through the first connecting pipe 7 and the first one-way pipe 6; when the piston plate 17 moves to the right, the pressure in the space on the right side of the piston cylinder 5 increases, and the water enters the annular cavity 19 through the second one-way pipe 8 and the second connecting pipe 9, and then flows out through the annular groove 20, forming a flowing water film on the inner wall of the shell 1. The use of two piston cylinders 5 allows the water flow to be in a continuous operation state, so that the water film is always in a state of formation. In the above-mentioned centrifugal separation process, when the water separated by centrifugal force hits the water film, it will be directly "adhered" by the water droplets and flow down the wall with the water film. Compared with the existing direct impact on the dry inner wall, it effectively avoids the occurrence of impact atomization, reduces secondary entrainment, and improves the separation effect of small particle size droplets. The separated steam is discharged from the exhaust pipe 4. This structure further promotes the flow of water at the bottom of the shell 1, thereby further reducing the possibility of scale formation.

[0043] It should be noted that if scale appears after long-term use, water and scale remover are added to the inside of the shell 1, the drive motor 11 is started to rotate at high speed, and the folded scraper 32 scrapes the inner wall of the shell 1 to facilitate the scale removal operation.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A boiler steam-water separation system, characterized in that: include: A separation mechanism, the separation mechanism comprising a shell (1), a sealing circular plate (22) being horizontally arranged in the shell (1), the sealing circular plate (22) dividing the shell (1) into an upper exhaust space and a lower separation space, a connecting cylinder (21) being provided through the sealing circular plate (22), the connecting cylinder (21) being fixedly connected to the sealing circular plate (22), a spiral guide plate (30) being fixedly connected to the outer side of the lower portion of the connecting cylinder (21) being located, the inner top of the shell (1) being rotatably connected to a rotating shaft (16), the lower end of the rotating shaft (16) being provided through the connecting cylinder (21), a separating screen (23) being provided through the rotating shaft (16), the upper end of the separating screen (23) being in contact with the lower end surface of the connecting cylinder (21); A driving mechanism, the driving mechanism comprising a mounting frame (10) fixedly connected to the upper end of the housing (1) and mounted on the upper end of the housing (1); a driving motor (11) is mounted on the mounting frame (10); an output shaft of the driving motor (11) is fixedly connected to a first gear (12); an upper end of the rotating shaft (16) extends to the outside and is mounted with a second gear (13); the first gear (12) is meshed with the second gear (13); A stirring mechanism, the stirring mechanism is used to promote the fluidity of the bottom water body; A water film forming mechanism is used to improve the steam-water separation effect.

2. A boiler steam-water separation system according to claim 1, characterized in that: A plurality of supporting legs (2) are installed at the lower end of the shell (1), an inlet pipe (3) is connected to the left side of the shell (1), and an exhaust pipe (4) is provided on the right side of the shell (1).

3. A boiler steam-water separation system according to claim 2, characterized in that: The inlet pipe (3) is in communication with the top space of the separation space, and the exhaust pipe (4) is in communication with the exhaust space.

4. A boiler steam-water separation system according to claim 1, characterized in that: A temporary storage box (24) is provided below the housing (1); the inner top of the temporary storage box (24) is connected to the inner bottom of the housing (1) through a liquid drop pipe (25); the inner bottom of the temporary storage box (24) is connected to a liquid discharge pipe (27); a normally closed electromagnetic valve (26) is installed inside the liquid drop pipe (25); and a normally open electromagnetic valve (28) is installed inside the liquid discharge pipe (27).

5. The boiler steam-water separation system according to claim 1, characterized in that: A U-shaped scraper (29) is fixedly connected to the side wall of the bottom portion of the connecting cylinder (21), and the upper end of the lower horizontal portion of the U-shaped scraper (29) contacts the separation screen (23) and is slidably connected thereto.

6. The boiler steam-water separation system according to claim 1, characterized in that: The stirring mechanism comprises two guide cylinders (31) fixedly connected to the left side of the lower end of the rotating shaft (16), and a sliding block (34) that can slide left and right is provided in each of the two guide cylinders (31). The right side of one of the sliding blocks (34) is elastically connected to the inner wall of the corresponding guide cylinder (31) through a spring (35). The left sides of the two sliding blocks (34) are fixedly connected to a fixing rod (33), and the left ends of the two fixing rods (33) are fixedly connected to a folding scraper (32).

7. The boiler steam-water separation system according to claim 1, characterized in that: The water film forming mechanism includes a piston plate (17) symmetrically fixedly connected to the piston cylinder (5), and the two piston cylinders (5) are both provided with a piston plate (17) that can slide left and right. The two piston plates (17) are fixedly connected to the cylinder connecting rod (15). The upper end of the rotating shaft (16) is fixedly connected to the rotating disk (14). The upper end of the rotating disk (14) is eccentrically connected to a linkage rod (18). The other end of the linkage rod (18) is rotatably connected to the right side of the left piston plate (17).

8. The boiler steam-water separation system according to claim 7, characterized in that: An annular cavity (19) is provided in the inner wall of the shell (1), and an annular groove (20) is provided on the inner wall of the shell (1) and is connected to the annular cavity (19). The opposite side spaces of the two piston cylinders (5) are connected to a first one-way tube (6) and a second one-way tube (8). The other ends of the two first one-way tubes (6) are connected to a first connecting tube (7). The other ends of the first connecting tube (7) are connected to the inner bottom space of the shell (1). The other ends of the two second one-way tubes (8) are connected to a second connecting tube (9). The other ends of the second connecting tube (9) are connected to the annular cavity (19). A one-way valve is installed inside each of the first one-way tube (6) and the second one-way tube (8). The one-way valve inside the first one-way tube (6) flows in a one-way direction from the first connecting tube (7) to the piston cylinder (5). The one-way valve inside the second one-way tube (8) flows in a one-way direction from the piston cylinder (5) to the annular cavity (19).

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