Vacuum deaerator based on dynamic negative pressure balance regulation and control

Abstract

This invention relates to the field of wastewater treatment technology, specifically to a vacuum deaerator based on dynamic negative pressure balance control, comprising a deaeration water tank and a swirl film tube. A deaeration head is connected to the top of the deaeration water tank, with an inlet chamber in the middle of the deaeration head and an air extraction port at the upper end. Each swirl film tube includes a rubber sleeve and multiple support rods. The axis of the rubber sleeve extends vertically, and the multiple support rods are all located inside the same rubber sleeve and evenly distributed around its circumference. Multiple water spray pipes are distributed axially along each support rod, penetrating both the inner and outer sides of the rubber sleeve. When a pressure difference is generated between the inside of the inlet chamber and the inside of the deaeration water tank, the rubber sleeve can contract or expand radially, changing the spray direction of the water spray pipes to adjust the tangential velocity of the water flow. This allows the water film to achieve a dynamic negative pressure balance state, thereby ensuring deaeration efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a vacuum deaerator based on dynamic negative pressure balance control. Background Technology

[0002] In wastewater treatment, especially for high-concentration organic wastewater, thermal desulfurization wastewater, dyeing and printing wastewater, and oilfield produced water, deaerators are typically required for deoxygenation. For example, patent application CN120864606A discloses a horizontal split-type swirl film deaerator. Its working principle is as follows: feedwater enters the annular inlet component through the inlet pipe, then flows into the upper half of the swirl film main pipe. Under the action of water level differential pressure, it is obliquely sprayed into the pipe through small holes, forming a jet. Heating steam enters the annular air inlet component through the air inlet pipe, then flows into the lower half of the swirl film main pipe. Because the swirl film pipe is filled with rising heating steam, the water flow entrains a large amount of steam during the jet process, achieving intense mixing and heating within a short time and short stroke, causing the water temperature to rise rapidly. The rotating water flow continues to swirl downwards along the inner wall of the membrane pipe, forming a turbulent water film skirt. At this time, the heat and mass transfer effect of the water in the turbulent state is good, and most of the dissolved oxygen can be removed.

[0003] However, since the swirl film main pipe is a rigid metal structure, its inner diameter remains constant. When the vacuum deaerator operates under high vacuum conditions or flash evaporation occurs inside the swirl film main pipe, the water flow inside the pipe cannot adhere to the wall and form a stable water film, thus reducing the deaeration efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a vacuum deaerator based on dynamic negative pressure balance control to address the technical problem of low deoxygenation efficiency in current deaerators.

[0005] The above objectives are achieved through the following technical solutions: A vacuum deaerator based on dynamic negative pressure balance control includes a deaeration water tank and swirl film tubes. A deaeration head is connected to the top of the deaeration water tank, and an inlet chamber is located in the middle of the deaeration head. An air extraction port is located at the upper end of the deaeration head, used to evacuate the interior of the deaeration water tank. Multiple swirl film tubes are arranged horizontally within the inlet chamber. Each swirl film tube includes a rubber sleeve and multiple support rods. The axis of the rubber sleeve extends vertically, and the multiple support rods are all located inside the same rubber sleeve and evenly distributed around its circumference. Multiple water spray pipes are distributed axially, penetrating both the inner and outer sides of the rubber sleeve. The outer end of the water spray pipe is connected to the water inlet chamber, and the inner end of the water spray pipe is connected to the inside of the rubber sleeve. The inner end of the water spray pipe is also in contact with the inner wall of the rubber sleeve, so that the water in the water inlet chamber is sprayed onto the inner wall of the rubber sleeve through the water spray pipe to form a water film. When a pressure difference is generated between the inside of the water inlet chamber and the inside of the deaerator tank, the rubber sleeve can contract or expand radially, thereby causing multiple support rods to move synchronously and tilt, thus changing the spray direction of the water spray pipe to adjust the tangential velocity of the water flow.

[0006] Furthermore, the axis of the water spray pipe forms an acute angle with the axis of the support rod, and the inner end of the water spray pipe is always inclined downwards.

[0007] Furthermore, when the pressure inside the deoxygenated water tank is less than the pressure in the inlet chamber, the rubber sleeve can contract radially, thereby causing multiple support rods to move and tilt towards the axis of the rubber sleeve, thus reducing the downward tilt angle of the inner end of the spray pipe and increasing the tangential velocity of the water flow; when the pressure inside the deoxygenated water tank is greater than the pressure in the inlet chamber, the rubber sleeve can expand radially, thereby causing multiple support rods to move and tilt away from the axis of the rubber sleeve, thus increasing the downward tilt angle of the inner end of the spray pipe and decreasing the tangential velocity of the water flow.

[0008] Furthermore, the deaerator head has a horizontally arranged first partition plate and a second partition plate inside, with the first partition plate located above the second partition plate, and the water inlet cavity formed between the first partition plate and the second partition plate; the upper end of the rubber sleeve is coaxially provided with an upper mounting ring, and the lower end of the rubber sleeve is coaxially provided with a lower mounting ring, the upper mounting ring being detachably mounted on the first partition plate, and the lower mounting ring being detachably mounted on the second partition plate, and multiple support rods being slidably and rotatably arranged between the upper mounting ring and the lower mounting ring.

[0009] Furthermore, the upper mounting ring is provided with a plurality of first sliding grooves in the circumferential direction, the length of the first sliding grooves extending radially along the upper mounting ring, and the lower mounting ring is provided with a plurality of second sliding grooves in the circumferential direction, the length of the second sliding grooves extending radially along the lower mounting ring. The first sliding grooves and the second sliding grooves correspond one-to-one, and the first sliding grooves and the second sliding grooves in the same group are circumferentially offset in the vertical direction. The upper end of the support rod is slidably and rotatably disposed in the corresponding first sliding groove, and the lower end of the support rod is slidably and rotatably disposed in the corresponding second sliding groove.

[0010] Furthermore, the radial length of the second slide groove is greater than the radial length of the first slide groove. The upper end of the support rod is provided with a hinge ball, which is limited and locked in the first slide groove, so that the upper end of the support rod can slide and rotate in the first slide groove. The lower end of the support rod is provided with an elliptical ball, the major axis of which is consistent with the length direction of the second slide groove. The elliptical ball is limited and locked in the second slide groove, so that the lower end of the support rod can slide and rotate in the second slide groove.

[0011] Furthermore, in the initial state, the articulated ball is located in the middle position of the first slide groove, the ellipsoid is located in the middle position of the second slide groove, and the support rod is inclined relative to the vertical direction.

[0012] Furthermore, the inner end of the water spray pipe has an inclined surface, which forms an acute angle with the axis of the water spray pipe, and the edge of the inclined surface is tangent to the inner wall of the rubber sleeve.

[0013] Furthermore, a reflux port is provided above the deoxygenated water tank, which is used to collect the condensate produced by the gas discharged from the exhaust port.

[0014] Furthermore, the deaerator head is provided with a water inlet, which is connected to the water inlet chamber; the bottom of the deaerator water tank is provided with a water outlet, which discharges water that has undergone deaeration treatment.

[0015] The beneficial effects of this invention are: The vacuum deaerator based on dynamic negative pressure balance regulation provided by this invention firstly, when a pressure difference is generated between the inside of the inlet chamber and the inside of the deaerator tank (such as when the inside of the deaerator tank is in a high vacuum environment or the water temperature in the inlet chamber is high, causing flash evaporation in the swirl film tube and resulting in volume expansion), the rubber sleeve can contract or expand radially, thereby not only changing its own diameter, but also changing the spray direction of the spray pipe to adjust the tangential velocity of the water flow, so as to achieve a dynamic negative pressure balance state of the water film inside the swirl film tube, thereby ensuring deaeration efficiency.

[0016] Secondly, the repeated contraction and expansion of the rubber sleeve can cause the hard scale layer adhering to its inner wall to fall off, achieving dynamic self-cleaning without the need for manual cleaning. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a vacuum deaerator based on dynamic negative pressure balance control according to an embodiment of the present invention; Figure 2 A side view of a vacuum deaerator based on dynamic negative pressure balance control according to an embodiment of the present invention. Figure 1 ; Figure 3 A side view of a vacuum deaerator based on dynamic negative pressure balance control according to an embodiment of the present invention. Figure 2 ; Figure 4 for Figure 3 Schematic diagram of the AA section; Figure 5 for Figure 4 Enlarged view of the structure at point B in the middle; Figure 6 This is a schematic diagram of the structure of a swirl film tube in a vacuum deaerator based on dynamic negative pressure balance control according to an embodiment of the present invention; Figure 7 A partial structural diagram of the swirl film tube in a vacuum deaerator based on dynamic negative pressure balance control, provided in an embodiment of the present invention. Figure 1 (At this point, the swirl tube is in its initial state). Figure 8 A partial structural diagram of the swirl film tube in a vacuum deaerator based on dynamic negative pressure balance control, provided in an embodiment of the present invention. Figure 2 (At this time, the swirl tube is in an expanded state). Figure 9 A partial structural diagram of the swirl film tube in a vacuum deaerator based on dynamic negative pressure balance control, provided in an embodiment of the present invention. Figure 3 (At this time, the swirl tube is in a contracted state); Figure 10 for Figure 7 A side view diagram; Figure 11 for Figure 8 A side view diagram; Figure 12 for Figure 9 A side view diagram; Figure 13 for Figure 7 A top-down view; Figure 14 for Figure 8 A top-down view; Figure 15 for Figure 9 A top-down view.

[0018] in: 100. Deoxygenated water tank; 101. Return port; 102. Drain port; 103. Water outlet; 200. Deoxygenated head; 201. Water inlet; 202. Air extraction port; 203. First partition plate; 204. Second partition plate; 301. Upper mounting ring; 3011. First sliding groove; 302. Lower mounting ring; 3021. Second sliding groove; 303. Support rod; 3031. Hinge ball; 3032. Ellipsoidal sphere; 304. Water spray pipe; 305. Rubber sleeve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not 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 limiting the invention.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] like Figures 1 to 15As shown in the figure, an embodiment of the present invention provides a vacuum deaerator based on dynamic negative pressure balance control, including a deaerator tank 100 and a swirl film tube. A deaerator head 200 is connected to the top of the deaerator tank 100. The deaerator head 200 has a water inlet chamber in the middle and an air extraction port 202 at its upper end. The air extraction port 202 is used to evacuate the interior of the deaerator tank 100. Multiple swirl film tubes are provided and horizontally distributed in the water inlet chamber. Each swirl film tube includes a rubber sleeve 305 and multiple support rods 303. The axis of the rubber sleeve 305 extends in the vertical direction. The multiple support rods 303 are all arranged inside the same rubber sleeve 305 and are evenly distributed around the circumference of the rubber sleeve 305. Multiple water spray pipes 304 are distributed axially on each support rod 303. The water spray pipes 304 penetrate the inner and outer sides of the rubber sleeve 305. The outer end of the water spray pipe 304 is connected to the water inlet chamber, and the inner end of the water spray pipe 304 is connected to the inside of the rubber sleeve 305. The inner end of the water spray pipe 304 is in contact with the inner wall of the rubber sleeve 305, so that the water in the water inlet chamber is sprayed onto the inner wall of the rubber sleeve 305 through the water spray pipe 304 to form a water film. When a pressure difference is generated between the inside of the water inlet chamber and the inside of the deaerator tank 100, the rubber sleeve 305 can contract or expand radially, so that the multiple support rods 303 move synchronously and tilt, thereby changing the spray direction of the water spray pipe 304 to adjust the tangential velocity of the water flow.

[0023] Specifically, the interior of the rubber sleeve 305 is connected to the interior of the deaerator head 200 and the area outside the water inlet chamber, thereby connecting the rubber sleeve 305 to the interior of the deaerator water tank 100.

[0024] A pressure difference exists between the interior of the inlet chamber and the interior of the deaerator tank 100, resulting in two scenarios: First, the interior of the deaerator tank 100 is under high vacuum (or low load). In this case, the negative pressure suction inside the swirl film tube is extremely high. The centrifugal force brought by the water flow entering the swirl film tube through the spray pipe 304 is often insufficient to resist the suction and gravity pointing towards the center. This causes the water flow to fail to adhere to the wall and form a hollow water film, instead forming a solid water column that collapses towards the center. This reduces the gas-liquid contact area, thereby reducing deaeration efficiency. Second, if the water temperature in the inlet chamber is higher than the corresponding saturation temperature inside the swirl film tube, flash evaporation will occur inside the tube, causing volume expansion. Consequently, the pressure inside the swirl film tube will be higher than the internal pressure of the inlet chamber. In this case, blockage will occur inside the swirl film tube, not only interrupting the water intake and affecting deaeration efficiency but also damaging the vacuum deaerator.

[0025] The vacuum deaerator based on dynamic negative pressure balance regulation of the present invention utilizes the principle of conservation of angular momentum. When a pressure difference is generated between the inside of the inlet chamber and the inside of the deaeration tank 100 (e.g., the inside of the deaeration tank 100 is in a high vacuum environment or the high water temperature in the inlet chamber causes flash evaporation in the swirl film tube, resulting in volume expansion), the rubber sleeve 305 can contract or expand radially. This not only changes its own diameter but also alters the spray direction of the spray pipe 304, thereby adjusting the tangential velocity of the water flow. This allows the water film inside the swirl film tube to achieve a dynamic negative pressure balance, ensuring deaeration efficiency. Furthermore, the repeated contraction and expansion of the rubber sleeve 305 promotes the shedding of hard scale layers adhering to its inner wall, achieving dynamic self-cleaning without the need for manual cleaning.

[0026] Furthermore, the axis of the water spray pipe 304 forms an acute angle with the axis of the support rod 303, and the inner end of the water spray pipe 304 is always inclined downwards. In this way, the water flow is always sprayed downwards, which can form a stable downward swirling film water flow and cooperate with the upward airflow, thereby improving the deoxygenation efficiency.

[0027] Furthermore, when the pressure inside the deoxygenated water tank 100 is less than the pressure in the inlet chamber, the rubber sleeve 305 can contract radially, thereby causing multiple support rods 303 to move and tilt towards the axis of the rubber sleeve 305, thus reducing the downward tilt angle of the inner end of the spray pipe 304 and increasing the tangential velocity of the water flow; when the pressure inside the deoxygenated water tank 100 is greater than the pressure in the inlet chamber, the rubber sleeve 305 can expand radially, thereby causing multiple support rods 303 to move and tilt away from the axis of the rubber sleeve 305, thus increasing the downward tilt angle of the inner end of the spray pipe 304 and decreasing the tangential velocity of the water flow.

[0028] When the pressure inside the deoxygenated water tank 100 is less than the pressure in the inlet chamber, such as when the inside of the deoxygenated water tank 100 is in a high vacuum environment, the rubber sleeve 305 contracts radially, causing multiple support rods 303 to move and tilt. This reduces the downward tilt angle of the spray pipe 304, increasing the tangential velocity of the water flow and thus increasing the centrifugal force of the water flow, preventing water film collapse and ensuring the contact area between the water film and the gas. When the pressure inside the deoxygenated water tank 100 is greater than the pressure in the inlet chamber, such as when flash evaporation occurs inside the swirl film tube causing volume expansion, the rubber sleeve 305 expands radially, causing multiple support rods 303 to move and tilt. This increases the downward tilt angle of the spray pipe 304, reducing the tangential velocity of the water flow and increasing the downward component velocity of the water flow. This creates an automatic pressure relief channel within the rubber sleeve 305, allowing the gas-water mixture to be quickly discharged, ensuring the continuity of water intake, and thus forming a stable water film and maintaining a high deoxygenation efficiency.

[0029] Furthermore, the deaerator head 200 has a horizontally arranged first partition plate 203 and second partition plate 204 inside. The first partition plate 203 is located above the second partition plate 204, and the water inlet chamber is formed between the first partition plate 203 and the second partition plate 204. The upper end of the rubber sleeve 305 is coaxially provided with an upper mounting ring 301, and the lower end of the rubber sleeve 305 is coaxially provided with a lower mounting ring 302. The upper mounting ring 301 is detachably mounted on the first partition plate 203, and the lower mounting ring 302 is detachably mounted on the second partition plate 204. Multiple support rods 303 are slidably and rotatably arranged between the upper mounting ring 301 and the lower mounting ring 302. This facilitates the assembly and disassembly of the swirl film tube. The first partition plate 203 and the upper mounting ring 301 are detachably connected by bolts, and the second mounting plate and the lower mounting ring 302 are detachably connected by bolts.

[0030] Furthermore, the upper mounting ring 301 has a plurality of first sliding grooves 3011 circumferentially, the length of which extends radially along the upper mounting ring 301. The lower mounting ring 302 has a plurality of second sliding grooves 3021 circumferentially, the length of which extends radially along the lower mounting ring 302. The first sliding grooves 3011 and second sliding grooves 3021 correspond one-to-one, and the first sliding grooves 3011 and second sliding grooves 3021 in the same group are circumferentially offset in the vertical direction. The upper end of the support rod 303 is slidably and rotatably disposed in the corresponding first sliding groove 3011, and the lower end of the support rod 303 is slidably and rotatably disposed in the corresponding second sliding groove 3021. This allows the support rod 303 to only tilt and rotate and move radially, making its movement trajectory controllable.

[0031] Furthermore, the radial length of the second slide groove 3021 is greater than the radial length of the first slide groove 3011. The upper end of the support rod 303 is provided with a hinge ball 3031, which is locked within the first slide groove 3011, allowing the upper end of the support rod 303 to slide and rotate within it. The lower end of the support rod 303 is provided with an elliptical sphere 3032, the major axis of which is aligned with the length direction of the second slide groove 3021. The elliptical sphere 3032 is locked within the second slide groove 3021, allowing the lower end of the support rod 303 to slide and rotate within it. This ensures flexible rotation at both ends of the support rod 303 and smooth movement.

[0032] Furthermore, in the initial state, the hinged ball 3031 is located in the middle of the first groove 3011, the ellipsoid 3032 is located in the middle of the second groove 3021, and the support rod 303 is inclined relative to the vertical direction. This facilitates the contraction or expansion of the rotary film tube.

[0033] Furthermore, the inner end of the water spray pipe 304 has an inclined surface, which forms an acute angle with the axis of the water spray pipe 304, and the edge of the inclined surface is tangent to the inner wall of the rubber sleeve 305. In this way, the water can flow along the inner wall of the rubber sleeve 305, which facilitates the formation of a uniform water film.

[0034] Furthermore, a reflux port 101 is provided above the deoxygenated water tank 100, which is used to collect the condensate produced by the gas discharged from the exhaust port 202. This ensures the water level in the deoxygenated water tank 100, which is beneficial for maintaining a stable vacuum.

[0035] Furthermore, the deaerator head 200 is provided with a water inlet 201, which is connected to the water inlet chamber; the bottom of the deaerator water tank 100 is provided with a water outlet 103, which discharges water that has undergone deaeration treatment.

[0036] The deoxygenated water tank 100 is also provided with a drain port 102 at the bottom and middle position. The drain port 102 is used to drain the water in the middle position at the bottom of the deoxygenated water tank 100 when cleaning the deoxygenated water tank 100.

[0037] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows: The external water to be deoxygenated is heated by high-temperature steam and then enters the inlet chamber through the inlet 201 on the deoxygenation head 200. The inlet chamber is filled with the water to be deoxygenated under a certain pressure. Figure 7 , Figure 10 and Figure 13 As shown, the swirl film tube is in its initial state. At this time, the rubber sleeve 305 is in its natural state and has a medium diameter. The pressurized water in the inlet chamber is sprayed into the interior of the rubber sleeve 305 through the spray pipe 304. The inclined surface of the inner end of the spray pipe 304 is tangent to the inner wall of the rubber sleeve 305, so that the water flows smoothly along the inner wall of the rubber sleeve 305, forming a uniform and stable rotating water film, thereby increasing the contact area between the steam and water and improving the deoxygenation effect. The air extraction port 202 at the upper end of the deoxygenation head 200 continuously evacuates the deoxygenated water tank 100 and the interior of the deoxygenation head 200, so that the water precipitates dissolved gas in the vacuum environment, thereby completing the deoxygenation. The water after deoxygenation is discharged through the outlet 103 at the bottom of the deoxygenated water tank 100. The condensate generated by the gas discharged from the air extraction port 202 flows back to the deoxygenated water tank 100 through the return port 101, ensuring the stability of the system water volume.

[0038] When the deaerator tank 100 is under high vacuum, the external pressure of the rubber sleeve 305 is greater than the internal pressure, such as... Figure 9 , Figure 12 and Figure 15As shown, the rubber sleeve 305 contracts radially under the action of pressure difference, causing the support rod 303 to move towards the axis of the rubber sleeve 305 and tilt. The hinge ball 3031 at the upper end of the support rod 303 and the ellipsoid 3032 at the lower end slide along the first slide groove 3011 and the second slide groove 3021 respectively, which reduces the downward tilt angle of the water spray pipe 304, makes the water flow more horizontal, increases the tangential velocity, and enhances the centrifugal force, effectively preventing the water film from collapsing towards the center, ensuring that a stable swirling film can still be formed under high vacuum conditions, and maintaining a high deoxygenation efficiency.

[0039] When the inlet water temperature is high, and violent flash vaporization occurs inside the rubber sleeve 305, the internal pressure increases, and the internal pressure of the rubber sleeve 305 becomes greater than the external pressure. Figure 8 , Figure 11 and Figure 14 As shown, the rubber sleeve 305 expands outward under the action of pressure difference, causing the support rod 303 to move and tilt away from the axis of the rubber sleeve 305, which increases the downward tilt angle of the water spray pipe 304 and increases the downward velocity of the water flow. At the same time, the diameter of the rubber sleeve 305 increases, forming a smooth pressure relief channel, allowing the air-water mixture to be discharged downward quickly, avoiding air blockage and clogging, ensuring continuous and stable water intake, and thus forming a stable water film to maintain a high deoxygenation efficiency.

[0040] Throughout the entire operation, the rubber sleeve 305 automatically undergoes reciprocating deformation of radial contraction and expansion according to changes in operating conditions. On the one hand, it adjusts the tangential velocity of the water flow and the size of the flow channel in real time to achieve dynamic negative pressure balance control. On the other hand, through repeated deformation, it breaks the bonding force between the scale and the inner wall, making the scale less likely to adhere and automatically falling off, thus achieving a self-cleaning function, extending the service life of the equipment, and reducing maintenance costs.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A vacuum deaerator based on dynamic negative pressure balance control, characterized in that, include: A deoxygenated water tank is provided with a deoxygenation head connected to its upper part. The deoxygenation head has a water inlet chamber in its middle part and an air extraction port at its upper end. The air extraction port is used to evacuate the inside of the deoxygenated water tank. The device includes multiple swirl tubes horizontally distributed within the water inlet chamber. Each swirl tube comprises a rubber sleeve and multiple support rods. The axis of the rubber sleeve extends vertically. The multiple support rods are all located inside the same rubber sleeve and are evenly distributed around the circumference of the rubber sleeve. Multiple water spray pipes are distributed axially along each support rod. The water spray pipes penetrate the inner and outer sides of the rubber sleeve. The outer end of the water spray pipe communicates with the water inlet chamber, and the inner end of the water spray pipe communicates with the inside of the rubber sleeve. The inner end of the water spray pipe is in contact with the inner wall of the rubber sleeve, thereby allowing the water in the water inlet chamber to be sprayed onto the inner wall of the rubber sleeve through the water spray pipes to form a water film. When a pressure difference is generated between the inside of the water inlet chamber and the inside of the deoxygenated water tank, the rubber sleeve can contract or expand radially, thereby causing multiple support rods to move synchronously and tilt, thus changing the spray direction of the water spray pipe to adjust the tangential velocity of the water flow.

2. The vacuum deaerator based on dynamic negative pressure balance control according to claim 1, characterized in that, The axis of the water spray pipe forms an acute angle with the axis of the support rod, and the inner end of the water spray pipe is always tilted downwards.

3. The vacuum deaerator based on dynamic negative pressure balance control according to claim 2, characterized in that, When the pressure inside the deoxygenated water tank is less than the pressure in the inlet chamber, the rubber sleeve can contract radially, thereby causing multiple support rods to move and tilt towards the axis of the rubber sleeve, thus reducing the downward tilt angle of the inner end of the spray pipe and increasing the tangential velocity of the water flow; when the pressure inside the deoxygenated water tank is greater than the pressure in the inlet chamber, the rubber sleeve can expand radially, thereby causing multiple support rods to move and tilt away from the axis of the rubber sleeve, thus increasing the downward tilt angle of the inner end of the spray pipe and decreasing the tangential velocity of the water flow.

4. The vacuum deaerator based on dynamic negative pressure balance control according to claim 3, characterized in that, The deaerator head has a first partition plate and a second partition plate arranged horizontally inside. The first partition plate is located above the second partition plate, and the water inlet cavity is formed between the first partition plate and the second partition plate. The upper end of the rubber sleeve is coaxially provided with an upper mounting ring, and the lower end of the rubber sleeve is coaxially provided with a lower mounting ring. The upper mounting ring is detachably mounted on the first partition plate, and the lower mounting ring is detachably mounted on the second partition plate. Multiple support rods are slidably and rotatably arranged between the upper mounting ring and the lower mounting ring.

5. The vacuum deaerator based on dynamic negative pressure balance control according to claim 4, characterized in that, The upper mounting ring has multiple first sliding grooves in its circumferential direction, and the length of the first sliding grooves extends radially along the upper mounting ring. The lower mounting ring has multiple second sliding grooves in its circumferential direction, and the length of the second sliding grooves extends radially along the lower mounting ring. The first sliding grooves and second sliding grooves correspond one-to-one, and the first sliding grooves and second sliding grooves in the same set are circumferentially offset in the vertical direction. The upper end of the support rod is slidably and rotatably disposed in the corresponding first sliding groove, and the lower end of the support rod is slidably and rotatably disposed in the corresponding second sliding groove.

6. The vacuum deaerator based on dynamic negative pressure balance control according to claim 5, characterized in that, The radial length of the second slide groove is greater than that of the first slide groove. The upper end of the support rod is provided with a hinge ball, which is limited and locked in the first slide groove, so that the upper end of the support rod can slide and rotate in the first slide groove. The lower end of the support rod is provided with an elliptical ball, the major axis of which is consistent with the length direction of the second slide groove. The elliptical ball is limited and locked in the second slide groove, so that the lower end of the support rod can slide and rotate in the second slide groove.

7. The vacuum deaerator based on dynamic negative pressure balance control according to claim 6, characterized in that, In the initial state, the articulated ball is located in the middle of the first groove, the ellipsoid is located in the middle of the second groove, and the support rod is inclined relative to the vertical direction.

8. The vacuum deaerator based on dynamic negative pressure balance control according to claim 2, characterized in that, The inner end of the water spray pipe has an inclined surface, which forms an acute angle with the axis of the water spray pipe, and the edge of the inclined surface is tangent to the inner wall of the rubber sleeve.

9. The vacuum deaerator based on dynamic negative pressure balance control according to claim 1, characterized in that, The deoxygenated water tank is provided with a reflux port at the top, which is used to collect the condensate produced by the gas discharged from the exhaust port.

10. The vacuum deaerator based on dynamic negative pressure balance control according to claim 1, characterized in that, The deoxygenator is provided with a water inlet, which is connected to the water inlet chamber; the bottom of the deoxygenated water tank is provided with a water outlet, which discharges water that has undergone deoxygenation treatment.

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