A blowdown expander

Abstract

The utility model discloses a kind of pollution expansion machines, comprising: lower jar body, upper jar body, steam-water separation mechanism, rotating mechanism, upper jar body is detachably connected in lower jar body, upper jar body and lower jar body jointly form jar body structure, steam-water separation mechanism is connected in jar body structure, rotating mechanism includes: shaft body, height adjustment assembly, shaft body is rotatably connected in lower jar body, height adjustment assembly connects shaft body with upper jar body, and for adjusting the height position of upper jar body. By rotating upper jar body to let out operating space, avoid the inconvenience in traditional structure, clean dirt in jar body or overhaul structure in jar body through manhole;Height adjustment assembly flexible adaptation upper jar body and lower jar body structure dislocation, without the aid of external lifting equipment, it is convenient to rotate upper jar body, realize the purpose of quickly opening upper jar body.

Description

Technical Field

[0001] This utility model relates to the field of boiler wastewater treatment technology, and in particular to a blowdown expander. Background Technology

[0002] A blowdown expander (also known as a blowdown expansion tank) is a key heat recovery device in industrial boiler systems, primarily used to treat high-temperature, high-pressure wastewater. Its working principle is as follows: boiler wastewater enters the tank after pressure reduction. Due to the sudden pressure drop, some water rapidly vaporizes, generating secondary steam that can be recovered and reused, while the remaining low-temperature water is safely discharged. Traditional structures use an integral welded tank body with internal steam-water separation components (such as baffles and cyclones) to improve steam quality. A manhole is typically located on the side of the tank for maintenance, and a blowdown valve is installed at the bottom for periodic drainage. This equipment plays a crucial role in reducing boiler energy consumption and thermal pollution.

[0003] During operation, dissolved solids (such as calcium and magnesium salts) in the wastewater gradually precipitate out within the tank due to pressure and temperature changes, forming a hard scale layer on the tank walls and separation components. Simultaneously, impurities such as rust and sludge deposit in areas with lower flow rates. This type of fouling not only clogs the flow channels and reduces separation efficiency but also induces localized corrosion. Traditional integral tanks rely solely on manholes for maintenance, severely limiting operating space and making it difficult for cleaning tools to reach the bottom of the tank. This necessitates prolonged periods of cramped work, resulting in long maintenance cycles and high costs. Utility Model Content

[0004] This application provides a sewage expansion device that solves the problem that conventional expansion devices can only be inspected or cleaned through a manhole by designing the tank body as a separable upper and lower tank structure.

[0005] This application provides a sewage expansion device, including:

[0006] Lower tank body;

[0007] The upper tank is detachably connected to the lower tank, and the upper tank and the lower tank together form a tank structure;

[0008] A vapor-water separation mechanism is connected to the tank structure;

[0009] The rotating mechanism includes a shaft and a height adjustment component. The shaft is rotatably connected to the lower tank, and the height adjustment component connects the shaft to the upper tank and is used to adjust the height of the upper tank.

[0010] The advantages of the above embodiments are as follows: by rotating the upper tank to make room for operation, the inconvenience of cleaning the tank through the manhole or inspecting the structure of the tank in the traditional structure is avoided; the height adjustment component can flexibly adapt to the misalignment of the upper and lower tank structures, without the need for external lifting equipment, making it easy to rotate the upper tank and achieve the purpose of quickly opening the upper tank.

[0011] Based on the above embodiments, the embodiments of this application can be further improved as follows:

[0012] In one embodiment of this application: the steam-water separation mechanism includes: a first separation component, the lower tank being provided with a liquid inlet, and the first separation component being disposed at the liquid inlet. The beneficial effect of this step is that by directly setting the first separation component at the liquid inlet, the initial kinetic energy of the fluid is used to achieve pre-separation of steam and water at the inlet stage, reducing the load on subsequent separation structures and simultaneously weakening the direct impact of high-speed fluid on the tank.

[0013] In one embodiment of this application: the first separation component includes: a first damper and a second damper. The first damper has a first ring, and the second damper has a second ring. The second ring is located above the first ring and inserted into the first ring, forming a baffle zone between the first ring and the second ring. The beneficial effect of this step is that the baffle zone formed by the nested annular damper forcibly changes the gas flow direction, making it easier for the liquid and gas to separate.

[0014] In one embodiment of this application, the liquid inlet is arranged along the tangential direction of the first annular sleeve. The beneficial effects of this step are: the tangential liquid inlet design causes the fluid to form a swirling flow along the outer wall of the annular sleeve, utilizing centrifugal force to achieve efficient separation of droplets and gas, and reducing the impact and vibration of the fluid on the device.

[0015] In one embodiment of this application, the gas-water separation mechanism further includes a second separation component. The upper tank is equipped with an exhaust port, and the second separation component is disposed at the exhaust port. The beneficial effect of this step is that by adding a second separation component at the exhaust port, residual droplets carried in the airflow are intercepted, forming a dual protection mechanism of "primary separation at the inlet + final separation at the outlet."

[0016] In one embodiment of this application: the second separation component is a cone-shaped structure with the tip pointing downwards, and the second separation component is equipped with vent holes. The beneficial effects of this step are: the cone-shaped structure guides the separated droplets to converge and flow back downwards along the cone surface, avoiding secondary entrainment; the porous venting design balances gas flow and droplet collection efficiency.

[0017] In one embodiment of this application: the height adjustment component includes a threaded component and a driving component. The threaded component is vertically slidably inserted into a sleeve disposed at the front end of the shaft. The driving component is located above the sleeve and threadedly connected to the threaded component. The lower end of the driving component is positioned through the sleeve, and the lower end of the threaded component is connected to the upper tank body. The beneficial effect of this step is that the threaded drive, combined with the sleeve guide, forms a rigid height adjustment structure, facilitating the movement of the upper tank body in the height direction.

[0018] In one embodiment of this application: the rotating mechanism further includes: a support, balls, an upper positioning member, and a lower positioning member. The support is installed on the lower tank body, and the balls are rotatably arranged on both the upper and lower sides of the support. The upper and lower positioning members are both installed on the shaft, and the balls roll in contact with the upper and lower positioning members respectively. The upper and lower positioning members are used to limit the shaft to the support. The beneficial effects of this step are: the double ball bearing structure distributes the axial and radial loads of the rotating components; the clamping mechanism formed by the upper and lower positioning members can suppress shaft movement, ensuring rotational stability and equipment lifespan. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the structure of a sewage expansion device;

[0021] Figure 2 This is a partial structural diagram of the rotating mechanism.

[0022] The components include: 1. Lower tank body; 101. Liquid inlet; 102. Liquid outlet; 2. Upper tank body; 201. Exhaust outlet; 3. Gas-water separation mechanism; 301. First separation component; 302. First damper; 303. Second damper; 304. Water permeable hole; 305. Second separation component; 4. Rotation mechanism; 401. Shaft; 402. Height adjustment component; 403. Threaded part; 404. Drive component; 405. Sleeve; 406. Support; 407. Ball bearing; 408. Upper positioning component; 409. Lower positioning component; 5. Upper tank body; 6. Lower connecting seat; 7. Upper connecting seat. Detailed Implementation

[0023] In this application, unless otherwise expressly specified and limited, the terminology used should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of different terms in this utility model according to the specific circumstances, and the scope of the specific meaning should be limited to achieving the function of this application.

[0024] In the description of this application, it should be understood that the directional terms or positional relationships described are based on the orientation or positional relationships shown in the accompanying drawings, or based on the orientation or positional relationships in actual use, and are only for the purpose of facilitating the description of the contents of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] like Figure 1 As shown, a sewage expansion device includes: a lower tank 1, an upper tank 2, a vapor-water separation mechanism 3, and a rotating mechanism 4. The upper tank 2 is detachably connected to the lower tank 1, and the upper tank 2 and the lower tank 1 together form a tank structure. The vapor-water separation mechanism 3 is connected in the tank structure. The rotating mechanism 4 includes: a shaft 401 and a height adjustment component 402. The shaft 401 is rotatably connected to the lower tank 1, and the height adjustment component 402 connects the shaft 401 to the upper tank 2 and is used to adjust the height position of the upper tank 2.

[0026] In some embodiments of this application, such as Figure 1 As shown, the steam-water separation mechanism 3 includes a first separation component 301. The lower tank 1 is equipped with a liquid inlet 101, and the first separation component 301 is disposed at the liquid inlet 101. By directly setting the first separation component 301 at the liquid inlet 101, the initial kinetic energy of the fluid is used to achieve pre-separation of steam and water at the inlet stage, reducing the load on the subsequent separation structure and weakening the direct impact of high-speed fluid on the tank.

[0027] In some embodiments of this application, the following are examples: Figure 1 As shown, the tank body 1 is provided with support legs connected to the ground at the bottom. The support legs are connected to the ground by anchor bolts. The lowest point of the lower tank body 1 is provided with a drain port 102, which is used to discharge wastewater. The middle part of the lower tank body 1 has a liquid inlet 101, which is connected to the boiler's drain port and is used to discharge boiler wastewater into the lower tank body 1.

[0028] In some embodiments of this application, such as Figure 1 As shown, the top of the upper tank 2 is provided with an exhaust port 201, which is used to discharge the separated steam.

[0029] In some embodiments of this application, such as Figure 1 As shown, the sewage expansion device also includes: a lower connecting seat 5 and an upper connecting seat 6. The lower connecting seat 5 is welded to the upper end of the lower tank 1, and the upper connecting seat 6 is welded to the lower end of the upper tank 2. The upper connecting seat 6 and the lower connecting seat 5 are connected by bolts. The upper end face of the lower connecting seat 5 is also provided with an annular protrusion surrounding the inner cavity of the tank. The lower connecting seat 5 is provided with a groove corresponding to the protrusion. The accuracy and speed of docking between the upper tank 2 and the lower tank 1 are improved by the cooperation of the protrusion and the groove. A sealing ring groove is provided around the inner cavity of the protrusion. A sealing ring is inserted into the sealing ring groove. The upper connecting seat 6 presses the sealing ring, thereby achieving a seal between the upper connecting seat 6 and the lower connecting seat 5.

[0030] In some embodiments of this application, such as Figure 1 As shown, the first separation component 301 includes a first damper 302 and a second damper 303. The first damper 302 has a first ring, and the second damper 303 has a second ring. The second ring is located above the first ring and inserted into the first ring. A flow deflection zone is formed between the first ring and the second ring. The flow deflection zone formed by the nested annular damper forcibly changes the gas flow direction, making it easier for the liquid and gas to separate.

[0031] In some embodiments of this application, such as Figure 1 As shown, the first damper 302 further includes a first base plate, and the second damper 303 further includes a second base plate. The first base plate is annular, and a first ring is connected to the inner ring of the first base plate. The second base plate is annular, and a second ring is connected to the inner ring of the second base plate. The first base plate and the second base plate are welded to the inner wall of the lower tank 1 respectively. Reinforcing ribs are also provided between the first base plate, the second base plate and the inner wall. The second base plate is provided with several water permeable holes, which are used to guide the water separated from the first separation of steam and water into the bottom of the lower tank 1.

[0032] In some embodiments of this application, such as Figure 1 As shown, the liquid inlet 101 is arranged along the tangential direction of the first ring. The tangential liquid inlet design causes the fluid to form a swirling flow along the outer wall of the ring, which utilizes centrifugal force to achieve efficient separation of droplets and gas, and reduces the impact and vibration of the fluid on the device.

[0033] In some embodiments of this application, such as Figure 1 As shown, the steam-water separation mechanism 3 further includes a second separation component 304, which is disposed at the exhaust port 201. The addition of the second separation component 304 at the exhaust port 201 intercepts residual droplets carried in the airflow, forming a dual protection mechanism of "primary separation at the inlet + final separation at the outlet".

[0034] In some embodiments of this application, such as Figure 1 As shown, the second separation component 304 is a cone-shaped structure with the tip pointing downwards. The second separation component 304 is equipped with an exhaust hole. The cone-shaped structure guides the separated droplets to converge and flow back downwards along the cone surface. The liquid drips through the inner hole in the middle of the first damper 302 and the second damper 303 to the bottom of the lower tank 1 and is discharged through the drain port 102.

[0035] In some embodiments of this application, such as Figure 1 As shown, the height adjustment component 402 includes a threaded component 403 and a driving component 404. The threaded component 403 is vertically slidably inserted into a sleeve 405 disposed at the front end of the shaft 401. The driving component 404 is located above the sleeve 405 and is threadedly connected to the threaded component 403. The lower end of the driving component 404 is positioned by the sleeve 405. The lower end of the threaded component 403 is connected to the upper tank 2. The threaded drive and the sleeve 405 guide form a rigid height adjustment structure, which facilitates the movement of the upper tank 2 in the height direction.

[0036] In some embodiments of this application, such as Figure 1 As shown, the shaft 401 has an inverted L-shaped structure. The vertical side of the shaft 401 is rotatably connected to the lower tank 1, and the horizontal side of the shaft 401 extends to the top of the upper tank 2. The sleeve 405 is connected to the end of the horizontal side in the vertical direction. The threaded part 403 adopts a lifting eye screw. The lifting eye of the lifting eye screw is hooked to another lifting eye welded to the top of the upper tank 2. The screw of the lifting eye screw passes through the sleeve 405 and extends to the top of the sleeve 405. The driving part 404 adopts a handwheel. The handwheel is threadedly connected to the screw. The lower end face of the handwheel contacts the sleeve 405, so that the overall structure is positioned.

[0037] In some embodiments of this application, such as Figure 2 As shown, the rotating mechanism 4 further includes: a support 406, ball bearings 407, an upper positioning member 408, and a lower positioning member 409. The support 406 is installed on the lower tank body 1. The ball bearings 407 are rotatably arranged on both the upper and lower sides of the support 406. The upper positioning member 408 and the lower positioning member 409 are both installed on the shaft body 401. The ball bearings 407 are in rolling contact with the upper positioning member 408 and the lower positioning member 409 respectively. The upper positioning member 408 and the lower positioning member 409 are used to limit the rotation of the shaft body 401 to the support 406.

[0038] In some embodiments of this application, such as Figure 2As shown, the support 406 is welded to the lower tank 1. The support 406 is equipped with a guide sleeve arranged vertically. The upper and lower ends of the guide sleeve are connected to the mounting base. The mounting base has an arc-shaped structure. The axis of the inner hole of the mounting base is collinear with the axis of the guide sleeve. The mounting base has several arc-shaped grooves evenly distributed on the same circumference along the axis of the inner hole. The grooves are hemispherical structures adapted to the ball 407. The grooves are coated with lubricating grease. The ball 407 is placed in the groove. The end face of the mounting base is also equipped with a pressure cap. The pressure cap has an arc-shaped through groove. The through groove corresponds one-to-one with the groove. The through groove limits the rolling of the ball 407 between the mounting base and the pressure cap. Part of the structure of the ball 407 extends to the outside through the pressure cap.

[0039] In some embodiments of this application, such as Figure 2 As shown, the upper positioning component 408 is welded to the shaft 401. The upper positioning component 408 is equipped with an annular upper guide groove corresponding to the ball 407 above the support 406. The ball 407 above the support 406 is rotatably disposed in the upper guide groove. The lower positioning component 409 is equipped with an annular lower guide groove corresponding to the ball 407 below the support 406. The upper end of the lower positioning component 409 is equipped with a positioning boss, which is inserted into the hole opened at the lower end of the shaft 401. The lower positioning component 409 is connected to the shaft 401 by bolts. The ball 407 below the support 406 is rotatably disposed in the lower guide groove. Through the double ball 407 group cooperative bearing structure, the axial and radial loads of the rotating parts are distributed. The clamping mechanism formed by the upper and lower positioning components 409 can suppress the movement of the shaft 401, ensuring rotational stability and equipment life.

[0040] When this type of wastewater expander is in use, high-temperature and high-pressure boiler wastewater is discharged into the expander through the inlet 101. The pressure drops sharply and the volume increases, causing some of the wastewater to vaporize instantly and generate secondary steam. The wastewater also enters the expander through the tangential pipe, causing the fluid to rotate. The generated steam rises along the tank body. The first separation component 301 forces the steam to deflect and move it from the middle position to the upper tank 2, where it contacts the second separation component 304. This further separates water droplets from the steam. The water droplets converge on the surface of the second separation component 304 and drip down to the bottom of the lower tank 1, exiting through the drain port 10. 2. Drain the sewage from the bottom of the lower tank 1 and discharge the steam through the exhaust port 201. When it is necessary to clean the inside of the tank structure, first remove the connecting bolts between the upper tank 2 and the lower tank 1, and then turn the handwheel. Since the overall structure of the screw is heavy, the screw will not rotate synchronously with the handwheel. By rotating the handwheel, the screw will move upward a certain distance. This distance only needs to ensure that the lower tank 1 does not affect the rotation of the upper tank 2. Therefore, only a small displacement is needed. Then push the shaft 401 so that the upper tank 2 can rotate away from the lower tank 1.

[0041] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A sewage expansion device, characterized in that, include: Lower tank body; The upper tank is detachably connected to the lower tank, and the upper tank and the lower tank together form a tank structure; A vapor-water separation mechanism is connected to the tank structure; The rotating mechanism includes a shaft and a height adjustment component. The shaft is rotatably connected to the lower tank, and the height adjustment component connects the shaft to the upper tank and is used to adjust the height of the upper tank.

2. The sewage expansion device according to claim 1, characterized in that, The vapor-water separation mechanism includes: a first separation component, wherein the lower tank is provided with a liquid inlet, and the first separation component is disposed at the liquid inlet.

3. The sewage expansion device according to claim 2, characterized in that, The first separation component includes: a first damper and a second damper. The first damper has a first ring sleeve, and the second damper has a second ring sleeve. The second ring sleeve is located above the first ring sleeve and inserted into the first ring sleeve, and a deflection zone is formed between the first ring sleeve and the second ring sleeve.

4. The sewage expansion device according to claim 3, characterized in that, The liquid inlet is positioned along the tangential direction of the first ring.

5. The sewage expansion device according to claim 1, characterized in that, The steam-water separation mechanism further includes a second separation component, wherein the upper tank is provided with an exhaust port, and the second separation component is disposed at the exhaust port.

6. The sewage expansion device according to claim 5, characterized in that, The second separation component is a cone-shaped structure with the tip pointing downwards, and the second separation component is equipped with an exhaust port.

7. The sewage expander according to claim 1, characterized in that, The height adjustment component includes a threaded component and a driving component. The threaded component is slidably inserted vertically into a sleeve disposed at the front end of the shaft. The driving component is located above the sleeve and is threadedly connected to the threaded component. The lower end of the driving component is positioned through the sleeve, and the lower end of the threaded component is connected to the upper tank.

8. The sewage expander according to claim 1, characterized in that, The rotating mechanism further includes: a support, balls, an upper positioning member, and a lower positioning member. The support is installed on the lower tank body. The upper and lower sides of the support are both equipped with rotatably arranged balls. The upper positioning member and the lower positioning member are both installed on the shaft. The balls are in rolling contact with the upper positioning member and the lower positioning member, respectively. The upper positioning member and the lower positioning member are used to limit the shaft to the support.

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