A feed water device for a boiler

Abstract

This invention discloses a boiler feedwater device, comprising a water storage tank and a deaerator. The deaerator includes: a coil layer connected to the water storage tank and equipped with coils; a packing layer connected to and installed at the upper end of the coil layer; a liquid distribution deaerator layer, including a liquid distribution plate disposed at the upper end of the packing layer, a mounting frame disposed on the liquid distribution plate, and multiple ultrasonic deaerator contacts disposed on the mounting frame. At least one heat-conducting pipe is vertically disposed on the upper surface of the liquid distribution plate, and a channel corresponding to the heat-conducting pipe is disposed through the liquid distribution plate; and a gas distribution chamber connected to a steam pipe, coils, and mounting frame. The mounting frame is provided with a gas outlet. By integrating ultrasonic deaeration and thermal convection deaeration technologies, the invention solves the problem of limited effect and insufficient efficiency of single deaeration methods in the prior art. The entire device includes a water storage tank and a deaerator, with each level of the deaerator and the gas distribution chamber working together to achieve dual deaeration, thereby improving the deaeration effect and efficiency.

Description

Technical Field

[0001] This invention relates to the field of boiler equipment technology, and in particular to a boiler feedwater device. Background Technology

[0002] During boiler operation, dissolved oxygen in the water can cause serious corrosion to boiler equipment, affecting the service life and operational safety of the boiler. Therefore, deoxygenation treatment of boiler feedwater is crucial, and deaerators are also installed in the boiler's water collection device.

[0003] Existing boiler deoxygenation methods include ultrasonic deoxygenation and thermal convection deoxygenation. For example, invention patent application number 2025106373545 discloses an intelligent ultrasonic deoxygenator for boiler feedwater treatment, which achieves deoxygenation by setting a movable flipping component in the water tank and installing ultrasonic deoxygenation contacts on the component to ensure the deoxygenation effect. Invention patent application number 2025104115996 provides a boiler feedwater deoxygenator and its usage method. This method uses the convection of water vapor and water flow to heat the water flow to achieve deoxygenation, and improves the deoxygenation effect by increasing the contact area between the water flow and water vapor.

[0004] Currently, boiler deaeration methods mostly employ either ultrasonic deaeration or thermal convection deaeration. To improve deaeration efficiency, ultrasonic deaeration typically reduces dead zones by reciprocating the ultrasonic deaeration probe and disturbing the water flow; thermal convection deaeration enhances its effect by increasing the contact area between water and steam. Both methods utilize relatively fixed and singular techniques. It is rare to see a combination of ultrasonic and thermal convection deaeration to achieve a dual improvement in both deaeration effect and efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems by providing a boiler feedwater device.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a boiler feedwater device, comprising a water storage tank and a deaerator, wherein the deaerator comprises: The coil layer is connected to the water storage tank and is equipped with coils; The packing layer is connected to the upper end of the coil layer; The liquid distribution deoxygenation layer includes a liquid distribution plate disposed at the upper end of the packing layer, a mounting bracket disposed on the liquid distribution plate, and multiple ultrasonic deoxygenator contacts disposed on the mounting bracket. At least one heat-conducting pipe is vertically disposed on the upper surface of the liquid distribution plate, and a channel corresponding to the heat-conducting pipe is disposed through the liquid distribution plate. It also includes a gas distribution chamber, which is connected to a steam pipe, a coil and a mounting bracket, and the mounting bracket is provided with a gas outlet.

[0007] Furthermore, a floating rod is vertically guided in the central area of ​​the liquid distribution plate, a mounting bracket is installed at the upper end of the floating rod, an air passage is provided inside the floating rod to connect with the air outlet, and the air distribution chamber is connected to the lower end of the floating rod.

[0008] Furthermore, the gas distribution chamber is disposed on the coil layer, and multiple gas distribution ports are evenly distributed around the axis on the side wall of the gas distribution chamber. The coil is evenly spaced around the gas distribution chamber and is connected to the multiple gas distribution ports.

[0009] Furthermore, the liquid distribution deoxygenation layer includes an outer shell disposed above the liquid distribution plate, and a water pipe is disposed on one side wall of the outer shell, with the opening of the water pipe communicating with the outer shell being lower than the upper end of the heat-conducting pipe.

[0010] Furthermore, the heat-conducting pipes are evenly arranged around the center of the liquid distribution plate and are staggered with multiple ultrasonic deaerator contacts.

[0011] Furthermore, a piston cylinder is provided at the top of the gas distribution chamber, a movable plate is provided inside the piston cylinder as a guide, a gas distribution channel is provided between the lower end of the piston cylinder and the gas distribution chamber, and a flow rate adjustment mechanism is provided on the gas distribution channel. The flow rate adjustment mechanism can adjust the flow area of ​​the connecting channel when the movable plate moves up and down. The floating rod is connected to the movable plate.

[0012] Furthermore, a valve is provided between the gas distribution chamber and the piston cylinder, and a valve passage is coaxially provided at the upper end of the valve; Along the axial direction, a strip groove is provided on the side wall of the valve passage, and a gas distribution passage connecting the strip groove is provided on the lower end face of the valve. The valve guide is fitted with a valve stem, and the valve stem sidewall is provided with an arc-shaped groove. The interior is provided with a flow channel connecting the upper end and the arc-shaped groove. The upper end of the valve stem is connected to a movable plate.

[0013] Furthermore, a rigid tube is provided as a guide at the upper end of the piston cylinder, with both ends of the rigid tube connected to the movable plate and the floating rod respectively, and a communication port is provided at the lower end of the floating rod; A flow channel is provided through the movable plate. The flow area of ​​the flow channel is smaller than the flow area of ​​the strip groove, and the flow area of ​​the connecting port is not smaller than the flow area of ​​the strip groove.

[0014] Furthermore, at least one rigid cylinder is vertically arranged at the upper end of the piston cylinder, the rigid cylinder is fitted with a piston rod, the piston rod is connected to the movable plate, and the upper end of the rigid cylinder is connected to the gas distribution chamber through a gas distribution pipe.

[0015] Furthermore, a limiting surface is provided at the bottom of the valve passage.

[0016] The boiler feedwater device disclosed in this invention has the following advantages compared with the prior art: By integrating ultrasonic deoxygenation and thermal convection deoxygenation technologies, the problem of limited effect and insufficient efficiency of single deoxygenation methods in existing technologies is solved. The whole system includes a water storage tank and a deoxygenation tower. The various levels of the deoxygenation tower and the gas distribution chamber work together to achieve dual deoxygenation, thereby improving the deoxygenation effect and deoxygenation efficiency.

[0017] The vents on the mounting bracket can evenly inject steam into the liquid distribution deoxygenation layer. On the one hand, this provides additional heat to preheat the water entering the outer casing. On the other hand, the injected steam can disturb the water supply, reducing dead zones in the ultrasonic deoxygenation process. The dual disturbance of steam injection and ultrasonic vibration can further improve the uniformity of deoxygenation. At the same time, the combination of heat convection and ultrasonic deoxygenation achieves a dual improvement in deoxygenation effect and efficiency.

[0018] After water and steam come into contact within the packing, oxygen is removed. The oxygen and the resulting high-temperature steam form an upward airflow, which flows upward through the heat pipe and further exchanges heat with the water inside the outer shell.

[0019] A floating rod is installed, which can be pushed up and down by steam, thereby causing the mounting frame to move up and down. This further enhances the disturbance effect on the water, reduces dead zones, and improves the contact effect between the water and the ultrasonic deaerator contacts, thus improving the deaeration effect of the ultrasonic deaerator contacts.

[0020] The system uses its own steam pressure to drive the rigid tube to move up and down. The rigid tube is connected to a floating rod, which in turn drives the floating rod to move up and down. The floating rod floats using the power of the steam pressure itself, without the need for additional drive structures.

[0021] Through a top-down multi-layered layout structure and utilizing the gas distribution structure of the gas distribution chamber, steam and ultrasonic deaerator contacts are organically combined to generate convective heat transfer, thereby improving the deaeration effect and increasing the utilization rate of steam. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a boiler feedwater device according to the present invention.

[0023] Figure 2 This is a side view of a boiler feedwater device according to the present invention.

[0024] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the present invention at point AA.

[0025] Figure 4 This is a partial structural diagram of the deaerator in a boiler feedwater device according to the present invention.

[0026] Figure 5 This is a schematic diagram of the coil layer structure in the present invention. Figure 1 .

[0027] Figure 6 This is a schematic diagram of the coil layer structure in the present invention. Figure 2 .

[0028] Figure 7 This is a schematic diagram of the filler layer in this invention.

[0029] Figure 8 This is a schematic diagram of the connection structure of the liquid distribution plate, heat conduction cylinder and mounting bracket in this invention.

[0030] Figure 9 This is a schematic diagram of the mounting bracket in this invention.

[0031] Figure 10 This is a bottom view of the liquid distribution plate structure in this invention.

[0032] Figure 11 This is a schematic diagram of the connection structure of the gas distribution chamber, valve, and piston cylinder in this invention. Figure 1 .

[0033] Figure 12 This is a schematic diagram of the connection structure of the gas distribution chamber, valve, and piston cylinder in this invention. Figure 2 .

[0034] Figure 13 This is a schematic cross-sectional view of the gas distribution chamber, valve, and piston cylinder in this invention.

[0035] Figure 14 for Figure 13 The diagram shows a cross-sectional view of the present invention at point BB.

[0036] Figure 15 Schematic diagram of valve components and movable plate Figure 1 .

[0037] Figure 16 Schematic diagram of valve components and movable plate Figure 2 .

[0038] In the diagram: 1. Water storage tank; 10. Flange pipe; 2. Deaerator; 20. Liquid distribution deaerator layer; 200. Exhaust port; 201. Water pipe; 202. Outer shell one; 203. Heat conduction pipe; 204. Floating rod; 2040. Copper sleeve; 205. Liquid distribution plate; 2050. Channel; 206. Ultrasonic deaerator contact; 208. Mounting bracket; 2080. Air outlet; 21. Packing layer; 210. Outer shell two; 211. Packing; 2110. Circumvention cavity; 22. Coil layer; 220. Steam pipe; 22 1. Coil; 222. Outer shell 3; 23. Gas distribution chamber; 230. Gas distribution port 1; 231. Gas distribution pipe; 24. Rigid pipe; 240. Connecting port 1; 25. Piston cylinder; 250. Rigid cylinder; 26. Valve; 260. Valve passage; 261. Balance flow channel; 262. Strip groove; 263. Gas distribution channel; 264. Limiting surface; 27. Movable plate; 270. Valve stem; 271. Arc groove; 272. Piston rod; 273. Flow channel; 90. Water flow; 91. Rising airflow; 92. Steam flow. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0040] The specific implementation of the boiler feedwater device provided by the present invention is as follows: refer to Figure 1 - Figure 16 A boiler feedwater device includes a water storage tank 1 and a deaerator 2, wherein the deaerator 2 includes: The coil layer 22 is connected to the water storage tank 1 and is equipped with coil 221; The packing layer 21 is connected to the upper end of the coil layer 22; The liquid distribution deoxygenation layer 20 includes a liquid distribution plate disposed at the upper end of the packing layer 21, a mounting bracket 208 disposed on the liquid distribution plate, and a plurality of ultrasonic deoxygenator contacts 206 disposed on the mounting bracket 208. At least one heat-conducting pipe 203 is vertically disposed on the upper surface of the liquid distribution plate, and a channel 2050 corresponding to the heat-conducting pipe 203 is disposed through the liquid distribution plate 205. It also includes a gas distribution chamber 23, which is connected to a steam pipe 220, a coil 221 and a mounting bracket 208. The mounting bracket 208 is provided with a vent 2080.

[0041] In this application, boiler feedwater utilizes a combination of ultrasonic deaeration and thermal convection deaeration technologies to address the limitations and inefficiencies of existing single deaeration methods. The system comprises a water storage tank 1 and a deaeration tower 2. Each stage of the deaeration tower 2 and the gas distribution chamber 23 work together to achieve dual deaeration. A flange pipe 10 is installed at the top of the water storage tank 1. The coil layer 22 of the deaeration tower 2 includes a cylindrical outer shell 222 connected to the flange pipe 10 and coils 221. A steam pipe 220 is installed on the outer shell 222 for connecting to an external steam source. Air pores are evenly distributed on the upper surface of the coils 221.

[0042] The packing layer 21 includes a cylindrical outer shell 210 connected to the outer shell 222. The outer shell 210 contains packing material 211, which uses materials and structures commonly used in the prior art; these will not be limited or described in detail here. When the upper water flows through the packing material 211, it disperses into a thin film on the surface of the packing material 211, forming convection with the steam flowing from the coil 221 below. This increases the contact area between the water flow 90 and the steam, thereby improving the deoxygenation effect. The deoxygenated water then flows down into the water storage tank 1.

[0043] The liquid distribution deoxygenation layer 20 includes a liquid distribution plate 205 connected to the top of the outer shell 210 and an outer shell 202. An exhaust port 200 is provided on the top of the outer shell 202. The liquid distribution plate 205 is a plate-shaped structure made of stainless steel with evenly distributed liquid distribution holes. A water pipe 201 is provided on the side wall of the outer shell 202. A mounting bracket 208 on the liquid distribution plate provides a stable mounting carrier for the ultrasonic deoxygenator contact 206. At least one heat-conducting pipe 203 is vertically arranged on the upper surface of the liquid distribution plate 205. The heat-conducting pipe is made of materials with high thermal conductivity, such as stainless steel or copper. A channel 2050 corresponding to the heat-conducting pipe 203 is provided through the liquid distribution plate 205. Clean water is introduced into the outer shell 202 through the water pipe 201, and the water flows downwards through the liquid distribution plate 205.

[0044] The steam distribution chamber 23, as the core component for steam distribution, is connected to the steam pipe 220, the coil 221, and the mounting bracket 208. The steam pipe 220 supplies high-temperature steam to the steam distribution chamber 23, which then distributes the steam rationally to the coil 221 and the mounting bracket 208. The vent holes 2080 on the mounting bracket 208 can evenly spray the steam into the liquid distribution deoxygenation layer 20. On the one hand, this provides additional heat to preheat the water entering the outer shell 202; on the other hand, the sprayed steam can disturb the water supply, reducing dead zones in the ultrasonic deoxygenation process. The dual disturbance of steam injection and ultrasonic vibration can further improve the uniformity of deoxygenation. At the same time, the combination of heat convection and ultrasonic deoxygenation achieves a dual improvement in deoxygenation effect and efficiency.

[0045] During operation, high-temperature steam is introduced through steam pipe 220, and water is supplied through water pipe 201. The water flow rate is controlled so that the liquid level inside the outer shell 202 is not higher than the upper end of the heat conduction pipe 203. After initial deoxygenation by ultrasonic deaerator contact 206, the water is initially heated and disturbed by steam ejected through vent 2080. After initial deoxygenation, the water is distributed by liquid distribution plate 205 to form a uniform downward water flow 90. After passing through packing 211, it undergoes secondary deep deoxygenation by convection with steam from bottom to top.

[0046] refer to Figure 4 There is a certain distance between the packing 211 and the liquid distribution plate 205. After the water and steam come into contact in the packing 211, they are deoxygenated. The oxygen and the formed high-temperature steam form an upward airflow 91. During the downward flow of the water flow 90, it comes into contact with the water flow 90 and can further exchange heat with the water flow 90. Then the upward airflow 91 flows upward through the heat conduction pipe 203 and further exchanges heat with the water in the outer shell 202 through the heat conduction pipe 203. Then the oxygen is discharged through the outlet.

[0047] Furthermore, a floating rod 204 is vertically guided in the central area of ​​the liquid distribution plate, and a mounting bracket 208 is provided at the upper end of the floating rod 204. An air passage is provided inside the floating rod 204 that connects to the air outlet 2080, and the air distribution chamber is connected to the lower end of the floating rod 204.

[0048] The floating rod 204, vertically guided in the central area of ​​the liquid distribution plate, is made of high-strength alloy. Its guiding structure ensures that the floating rod 204 can only move in the vertical direction, avoiding horizontal deviation that could affect the stability of the mounting frame 208. The mounting frame 208 is fixedly mounted on the upper end of the floating rod 204 and can move up and down synchronously with the floating rod 204. The floating rod 204 is hollow inside, and a copper sleeve 2040 is installed between it and the liquid distribution plate 205. During operation, the floating rod 204 can be pushed up and down by steam, thereby causing the mounting frame 208 to move up and down. This further improves the disturbance effect on the water, further reduces the dead zone of the water, and improves the contact effect between the water and the ultrasonic deaerator contact 206, thus improving the deaeration effect of the ultrasonic deaerator contact 206.

[0049] Furthermore, as a specific implementation method, refer to Figure 4 - Figure 16 The gas distribution chamber 23 is located on the coil layer 22. Multiple gas distribution ports 230 are evenly distributed around the axis on the side wall of the gas distribution chamber 23. The coil 221 is evenly spaced around the gas distribution chamber 23 and is connected to the multiple gas distribution ports 230.

[0050] The gas distribution chamber 23 is made of stainless steel and is welded to the coil 221. The coil 221 is welded to the inner wall of the outer shell 222, providing stable and reliable support. The gas distribution chamber 23 is located on the coil layer 22, which shortens the distance between the gas distribution chamber 23 and the coil 221, reduces heat loss and pressure loss of steam during transportation, ensures stable steam parameters in the coil 221, and improves the initial thermal deoxygenation effect. Multiple gas distribution ports 230 are evenly distributed around the axis on the side wall of the gas distribution chamber 23 and are connected to the coil 221 which is evenly spaced around the gas distribution chamber 23. This allows the steam output from the gas distribution chamber 23 to be evenly distributed to each section of the coil 221, ensuring consistent heating intensity in each area of ​​the coil 221 and avoiding differences in feedwater deoxygenation effect due to uneven local heating. This ensures the stability of subsequent deoxygenation processes. Compared with the problem of uneven steam distribution in existing thermal convection deoxygenation, this structure can significantly improve the uniformity and reliability of thermal deoxygenation.

[0051] Furthermore, the liquid distribution deoxygenation layer 20 includes an outer shell 202 disposed above the liquid distribution plate. A water pipe 201 is disposed on the side wall of the outer shell 202. The opening of the water pipe 201 connected to the outer shell 202 is lower than the upper end of the heat-conducting pipe 203. The water pipe 201 is connected to the outer shell 202 to replenish water to the liquid distribution deoxygenation layer 20. The opening of the water pipe 201 connected to the outer shell 202 is lower than the upper end of the heat-conducting pipe 203. This design ensures that the replenished water can first come into full contact with the heat-conducting pipe 203 to achieve preliminary heating and deoxygenation before acting on the ultrasonic deoxygenator contact 206. This avoids the low-temperature water directly entering the ultrasonic deoxygenation process, which would reduce the deoxygenation effect. At the same time, it can make the water form a stable liquid layer in the outer shell 202, ensuring the sufficiency of ultrasonic deoxygenation and thermal convection deoxygenation, and improving the overall deoxygenation quality.

[0052] Further, refer to Figure 8 , Figure 9 The heat-conducting pipes 203 are evenly arranged around the center of the liquid distribution plate, ensuring uniform heating of the feed water above the plate and preventing localized low temperatures that could affect deoxygenation. Simultaneously, they are staggered with multiple ultrasonic deaerator contacts 206, ensuring that each contact is surrounded by heat-conducting pipes 203. This achieves a synergistic effect of ultrasonic vibration and heat transfer, accelerating the release of dissolved oxygen from the water. The staggered arrangement prevents the heat-conducting pipes 203 from obstructing ultrasonic energy, ensuring that ultrasonic energy is evenly distributed throughout the feed water area. Furthermore, the heat transferred by the heat-conducting pipes 203 enhances the ultrasonic deoxygenation effect. These two factors complement each other, further improving deoxygenation efficiency. Compared to single deoxygenation methods, this synergistic structure offers a more significant deoxygenation effect.

[0053] Furthermore, a valve 26 is provided between the gas distribution chamber 23 and the piston cylinder 25, and the upper end of the valve 26 is coaxial with the valve passage 260. Along the axial direction, a strip groove 262 is provided on the side wall of the valve passage 260, and a gas distribution passage 263 communicating with the strip groove 262 is provided on the lower end face of the valve component 26; The valve passage 260 is guided and fitted with a valve stem 270. The valve stem 270 has an arc-shaped groove 271 on its side wall and a flow channel connecting the upper end and the arc-shaped groove 271 inside. The upper end of the valve stem 270 is connected to the movable plate 27.

[0054] For details, please refer to Figures 11-16 The connection method of the gas distribution chamber 23, valve 26, and piston cylinder 25 is as follows: the gas distribution chamber 23 is connected to the steam pipe 220. With the above-mentioned arrangement, during operation, steam at a predetermined pressure P is introduced through the steam pipe 220. The predetermined pressure means that the steam is a constant value within a predetermined small range. After entering the gas distribution chamber, the steam is delivered through the valve passage 260, the arc groove 271, and the strip groove 262 to the lower end of the floating rod 204, which is connected to the inside of the piston cylinder, thereby supplying steam to the floating rod. During the steam flow, the steam can provide thrust to the movable plate, causing the movable plate to move axially. During the movement, it will drive the valve rod 270 to move, thereby adjusting the communication area of ​​the arc groove 271 and the strip groove, causing the amount of steam entering the piston cylinder to change, and causing the axial force on the movable plate to change. This allows the movable plate to reciprocate within a predetermined range in the axial direction, which achieves the gas distribution effect and drives the movable plate to reciprocate, thereby driving the floating rod 204 to reciprocate axially.

[0055] Furthermore, as a specific implementation method, please continue to refer to... Figures 11-16 A rigid tube 24 is provided at the upper end of the piston cylinder 25. The two ends of the rigid tube 24 are connected to the movable plate 27 and the floating rod 204 respectively. A communication port 240 is provided at the lower end of the floating rod 204. A flow channel 273 is provided through the movable plate 27. The flow area of ​​the flow channel 273 is smaller than the flow area of ​​the strip groove 262, and the flow area of ​​the connecting port 240 is not smaller than the flow area of ​​the strip groove 262.

[0056] refer to Figure 11 - Figure 16A movable plate 27 is guided inside the piston cylinder 25 at the top of the gas distribution chamber 23. The movable plate 27 can slide up and down along the inner wall of the piston cylinder 25. A gas distribution channel 263 between the lower end of the piston cylinder 25 and the gas distribution chamber 23 is used for steam flow. The movable plate 27 is subjected to a downward force F in the vertical direction. In this embodiment, the force F can be the difference between the weight of the mounting frame 208, the movable plate 27, the rigid pipe 24 and the floating rod 204 and the buoyancy force on the movable frame 27. The floating rod 204 is connected to the movable plate 27 through the rigid pipe 24, so that the up and down movement of the floating rod 204 can synchronously drive the movable plate 27 to move. As a specific embodiment, the flow area of ​​the arc groove 271 is greater than that of the strip groove 262. The flow area of ​​the strip groove is equal to the flow area of ​​the gas distribution channel 263. The relationship between the flow area Q1 of the strip groove and the flow area Q2 of the channel 273 is: Q1 = 1.8Q2 ~ 2.5Q2.

[0057] refer to Figure 4 , Figure 13 , Figure 14Along the axial direction of valve passage 260, the lower end of the arc-shaped groove 271 partially overlaps with the upper end of the strip groove 262. At this time, the rigid cylinder 250 abuts against the movable plate 27, which is the maximum upward movement position of the movable plate. At this time, the arc-shaped groove 271 and the strip groove 262 partially overlap. A limiting surface 264 is provided at the bottom of valve passage 260. In the initial state when not in operation, the movable plate 27, under the action of force F, causes the valve stem to abut against the limiting surface 264. At this time, the lower end of the strip groove 262 partially overlaps with the upper end of the arc-shaped groove, and the flow area Q3 of the overlapping area is greater than Q2. During operation, steam pipe 220 is introduced. Steam at a predetermined pressure P enters the piston cylinder 25 through the overlapping area of ​​the arc-shaped groove 271 and the strip-shaped groove 262 via the gas distribution channel 263. It then flows upward through the flow channel 273 on the movable plate 27, and finally flows to the mounting bracket 208 through the connecting port 240. Since the flow area of ​​the overlapping area is larger than the flow area of ​​the channel 273, the amount of steam entering the piston cylinder 25 is greater than the amount of steam passing through the movable plate 27. Therefore, the amount of steam below the movable plate increases, pushing the movable plate 27 upward against the force F. The steam above the movable plate then flows to the mounting bracket through the connecting port 240. Since the flow area of ​​240 is greater than Q2, the flow velocity of steam through the flow port 240 will be greater than the steam volume in the flow channel 273. Furthermore, during the upward movement, the overlapping area of ​​the strip groove and the arc groove increases, resulting in a faster steam velocity entering the piston cylinder, further accelerating the movement of the movable plate. As the movable plate continues to move, the overlapping area of ​​the strip groove and the arc groove gradually decreases. When the overlapping area of ​​the strip groove and the arc groove is equal to Q2, the amount of steam flowing into the piston cylinder 25 is approximately equal to the amount of steam passing through the flow channel 273 on the movable plate. At this point, the movable plate no longer accelerates upward and, under the action of inertia, the movable plate... The mounting bracket continues to move upward by a certain displacement. By controlling the value of the steam pressure P and the transverse contact area of ​​the movable plate 27, it is ensured that when "the overlapping area of ​​the strip groove and the arc groove is equal to Q2, the amount of steam flowing into the piston cylinder 25 is approximately equal to the amount of steam passing through the flow channel 273 on the movable plate." At this point, the steam pressure on the movable plate is less than F. As the movable plate continues to rise, it drives the valve stem 270 to rise, thus reducing the overlapping area of ​​the strip groove and the arc groove to less than Q2. Therefore, the amount of steam entering the piston cylinder is less than the amount of steam passing through the movable plate. The movable plate and the mounting bracket stop after moving a certain displacement due to inertia. At this point, the movable plate will be under force F. Under the action of the steam, the moving plate moves downward. After passing the position where the overlapping area of ​​the strip groove and the arc groove is equal to Q2, it continues to move downward for a certain position, so that the overlapping area of ​​the strip groove and the arc groove is greater than Q2 again. Then the air pressure difference on both sides of the moving plate is greater than the force F again, and the moving plate moves upward again. This process repeats, and the steam can achieve the effect of pushing the moving plate 27 to move back and forth in a certain range, thereby achieving the effect of driving the floating rod 204 to move back and forth.

[0058] For details, please refer to Figure 11- Figure 16 The gas distribution chamber 23, valve 26, and piston cylinder 25 are all made of stainless steel, and the three are connected end-to-end by threads. (Reference) Figure 7 The lower end of the packing 211 is provided with a relief cavity 2110 that avoids the piston cylinder 25; the valve passage 260 is a blind hole provided on the upper surface of the valve member 26, and a balance flow channel 261 connected to the inside of the outer shell 222 is provided at the bottom. By providing the balance flow channel 261, the air pressure at the bottom of the valve passage 260 can be balanced when the valve stem 270 reciprocates, thereby reducing the resistance of the valve stem 270 reciprocating; as a preferred embodiment, the surface of the valve stem 270 is electroplated with an anti-wear layer to meet the working requirements of the valve stem 270 reciprocating.

[0059] In one specific implementation, a force-applying component can be provided between the upper surfaces of the movable plate 27 and the piston cylinder 25. In this case, the force F is the sum of the force applied to the movable plate by the force-applying component and the weight of the movable plate, the mounting bracket, the rigid tube 24, and the floating rod 204. By providing the force-applying component, the force of the movable plate moving downwards can be increased, and the sensitivity of the return movement can be improved. In another specific implementation, the force-applying component can be a compression spring (not shown in the figure) provided above the movable plate, with both ends of the compression spring abutting against the upper surfaces of the movable plate and the piston cylinder, respectively.

[0060] Furthermore, as another feasible approach, refer to Figure 11 - Figure 13 The specific structure of the force-applying component is as follows: at least one rigid cylinder 250 is vertically arranged at the upper end of the piston cylinder 25, the rigid cylinder 250 is fitted with a piston rod 272, the piston rod 272 is connected to the movable plate 27, and the upper end of the rigid cylinder 250 is connected to the air distribution chamber 23 through the air distribution pipe 231.

[0061] At least one rigid cylinder 250 is vertically arranged at the upper end of the piston cylinder 25. In a specific embodiment, the rigid cylinder 250 includes three cylinders evenly spaced around the axis of the piston cylinder 25. The piston rod 272 is threadedly connected to the movable plate 27. The upper end of the piston rod 272 is provided with a piston that slides and guides the piston cylinder 25, forming an auxiliary guide structure with the piston rod 272. The lower end of the piston rod 272 is threadedly connected to the movable plate 27. The upper end of each rigid cylinder 250 is connected to a gas distribution pipe 231. The lower end of the gas distribution pipe 231 is connected to the gas distribution chamber 23. The gas distribution chamber 23 and the upper end of the rigid cylinder 250 are connected through the gas distribution pipe 231. When high-temperature steam is introduced into the gas distribution chamber 23, the steam enters the rigid cylinder 250 through the gas distribution pipe 231. The gas pressure in the rigid cylinder 250 is equal to the gas pressure in the gas distribution chamber 23, which can provide a downward thrust to the piston rod 272, thereby achieving the effect of providing a downward thrust to the movable plate 27.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A boiler feedwater device, comprising a water storage tank (1) and a deaerator (2), characterized in that, The deaerator (2) includes: The coil layer (22) is connected to the water storage tank (1) and is equipped with coils (221). The packing layer (21) is connected to the upper end of the coil layer (22); The liquid distribution deoxygenation layer (20) includes a liquid distribution plate (205) disposed at the upper end of the packing layer (21), a mounting bracket (208) disposed on the liquid distribution plate, and multiple ultrasonic deoxygenator contacts (206) disposed on the mounting bracket (208). At least one heat-conducting pipe (203) is vertically disposed on the upper surface of the liquid distribution plate, and a channel (2050) corresponding to the heat-conducting pipe (203) is disposed through the liquid distribution plate. It also includes a gas distribution chamber (23), which is connected to a steam pipe (220), a coil (221) and a mounting bracket (208), and the mounting bracket (208) is provided with a gas outlet (2080).

2. A boiler feedwater device according to claim 1, characterized in that, A floating rod (204) is vertically guided in the central area of ​​the liquid distribution plate (205). A mounting bracket (208) is set at the upper end of the floating rod (204). An air passage is provided in the floating rod (204) that connects to the air outlet (2080). The air distribution chamber is connected to the lower end of the floating rod (204).

3. A boiler feedwater device according to claim 2, characterized in that, The gas distribution chamber (23) is located on the coil layer (22). Multiple gas distribution ports (230) are evenly distributed around the axis on the side wall of the gas distribution chamber (23). The coil (221) is evenly spaced around the gas distribution chamber (23) and is connected to the multiple gas distribution ports (230).

4. A boiler feedwater device according to claim 1, characterized in that, The liquid distribution deoxygenation layer (20) includes an outer shell (202) disposed above the liquid distribution plate. A water pipe (201) is disposed on the side wall of the outer shell (202). The opening of the water pipe (201) connected to the outer shell (202) is lower than the upper end of the heat-conducting pipe (203).

5. A boiler feedwater device according to claim 4, characterized in that, The heat-conducting pipes (203) are evenly arranged around the center of the liquid distribution plate and are staggered with multiple ultrasonic deaerator contacts (206).

6. A boiler feedwater device according to claim 2, characterized in that, The top of the gas distribution chamber (23) is provided with a piston cylinder (25), and a movable plate (27) is provided inside the piston cylinder (25). A gas distribution channel (263) is provided between the lower end of the piston cylinder (25) and the gas distribution chamber (23). A flow rate adjustment mechanism is provided on the gas distribution channel (263). The flow rate adjustment mechanism can adjust the flow area of ​​the gas distribution channel (263) when the movable plate (27) moves up and down. The floating rod (204) is connected to the movable plate (27).

7. A boiler feedwater device according to claim 6, characterized in that, A valve (26) is provided between the gas distribution chamber (23) and the piston cylinder (25), and a valve passage (260) is coaxially provided at the upper end of the valve (26). Along the axial direction, a strip groove (262) is provided on the side wall of the valve passage (260), and a gas distribution passage (263) connecting the strip groove (262) is provided on the lower end face of the valve (26). The valve passage (260) is guided and fitted with a valve stem (270). The valve stem (270) has an arc groove (271) on its side wall and a flow channel connecting the upper end and the arc groove (271) inside. The upper end of the valve stem (270) is connected to the movable plate (27).

8. A boiler feedwater device according to claim 7, characterized in that, A rigid tube (24) is provided at the upper end of the piston cylinder (25). The two ends of the rigid tube (24) are connected to the movable plate (27) and the floating rod (204) respectively, and a communication port (240) is provided at the lower end of the floating rod (204). A flow channel (273) is provided through the movable plate (27). The flow area of ​​the flow channel (273) is smaller than that of the strip groove (262), and the flow area of ​​the connecting port (240) is not smaller than that of the strip groove (262).

9. A boiler feedwater device according to claim 8, characterized in that, At least one rigid cylinder (250) is vertically arranged at the upper end of the piston cylinder (25). The rigid cylinder (250) is fitted with a piston rod (272). The piston rod (272) is connected to the movable plate (27). The upper end of the rigid cylinder (250) is connected to the gas distribution chamber (23) through the gas distribution pipe (231).

10. A boiler feedwater device according to claim 9, characterized in that, The bottom of the valve passage (260) is provided with a limiting surface (264).

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