Atmospheric oxygen removal device

Abstract

The utility model belongs to the technical field of oxygen removal equipment, especially, relate to an atmospheric oxygen removal device, include: shell, the one end of shell is provided with the manhole of overhauling, shell constitutes oxygen -removing water tank, oxygen -removal tower, oxygen -removal tower sets up on the shell, the membrane rotator group, the membrane rotator group includes the membrane rotator tube, and the membrane rotator group distributes in shell and oxygen -removal tower, still include: cover, the cover is detachably fixed on the manhole of overhauling for closing the manhole of overhauling through bolt and nut, sealing unit, sealing unit covers the outer end for closing the gap between bolt / nut and cover / manhole of overhauling of bolt and nut, relative to prior art, the utility model effectively reduces the steam leakage phenomenon, improves the operation efficiency and oxygen removal efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of deoxygenation equipment, and in particular relates to an atmospheric deoxygenation device. Background Technology

[0002] Atmospheric deaerator, also known as atmospheric swirl film deaerator, is mainly used in the field of boilers in power systems, industrial boilers and feedwater treatment in thermal power plants. The equipment consists of a deaerator head and a water tank. It completes the steam-water mass transfer by forming a jet water film skirt through the swirl film assembly, realizing a two-stage deaeration mechanism.

[0003] Existing atmospheric deaerators typically consist of an outer shell (made of a cylindrical body and a stamped elliptical head welded together, with a manhole for maintenance), a swirl film assembly (composed of a water chamber, a steam chamber, a swirl film tube, a condensate inlet pipe, a makeup water inlet pipe, and a primary steam inlet pipe), a water spray grate, and a heat storage packing liquid-vapor mesh, among other structures.

[0004] In the operation of this existing atmospheric deaerator, the maintenance manhole on the outer shell is usually secured by a cover with bolts and nuts. However, steam inside the device can leak through the tiny gaps in the bolts / nuts, which requires frequent tightening of the nuts and shutdown for maintenance, affecting operating efficiency. At the same time, the circular nozzles used in the swirl film tube form a slender cone spray with a small contact area with the steam, reducing the deaeration efficiency. Therefore, it is necessary to make improvements. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing an atmospheric deoxygenation device that effectively reduces steam leakage and improves operating efficiency and deoxygenation efficiency.

[0006] In view of this, the present invention provides an atmospheric deoxygenation device, comprising:

[0007] The outer casing has a maintenance manhole at one end, and the outer casing constitutes a deoxygenated water tank.

[0008] Deoxygenation tower, wherein the deoxygenation tower is mounted on the outer shell;

[0009] A swirl film generator assembly, comprising swirl film tubes, wherein the swirl film generator assembly is distributed within the outer shell and the deaerator tower;

[0010] Also includes:

[0011] A cover body, which is detachably fixed to the maintenance manhole by bolts and nuts for sealing the maintenance manhole;

[0012] A sealing unit that covers the outer ends of bolts and nuts to seal the gap between the bolts / nuts and the cover / access manhole.

[0013] In this technical solution, the sealing unit effectively seals the gap between the bolts / nuts and the cover / manhole, preventing internal steam leakage. This reduces the frequency of nut tightening, decreases downtime for maintenance, improves the operating efficiency of the unit, and ensures the continuity and stability of the production system.

[0014] In the above technical solution, the sealing unit further includes:

[0015] A sealing shell, wherein the sealing shell has a hollow structure and a first opening and a second opening are respectively provided at both ends of the sealing shell;

[0016] A blind cap nut, wherein the blind cap nut is disposed at the outer end of the bolt and threadedly connected to the outer end of the bolt;

[0017] Two sealing washers are respectively disposed between the blind cap nut and the sealing shell, and between the sealing shell and the surface of the cap body;

[0018] The sealing shell is placed over the outer end of the bolt, and the outer end of the bolt passes through the second opening and the first opening in sequence. The blind cap nut is tightened on the outer end of the bolt and then pressed against the outer end of the sealing shell, pressing the sealing shell against the surface of the cover.

[0019] In the above technical solution, the sealing gasket further includes:

[0020] The ring body is hollow and has a honeycomb-shaped axial support frame inside.

[0021] The upper and lower surfaces of the ring are both provided with a sealing layer.

[0022] Furthermore, the above technical solution also includes:

[0023] A polymer filler is provided in the axial support frame.

[0024] Furthermore, the above technical solution also includes:

[0025] The nozzle is disposed on the rotary film tube, and the output end of the nozzle has a flared groove in the shape of ">".

[0026] The nozzle has a threaded output end for connecting to a rotary film tube, and the flared groove is used to shape the output medium into an 80-120° fan-shaped spray.

[0027] The beneficial effects of this utility model are:

[0028] 1. By setting up a sealing unit consisting of a sealing shell, a blind cover nut, and a sealing washer, a multiple sealing barrier is formed, effectively sealing the gap between the bolt / nut and the cover / manhole, preventing internal steam leakage. This reduces the frequency of nut tightening operations, decreases the number of downtime maintenance, improves the operating efficiency of the unit, and ensures the continuity and stability of the production system.

[0029] 2. The axial support frame and polymer filler in the sealing gasket improve sealing performance and elasticity, extending the service life of the sealing unit.

[0030] 3. The ">" shaped flared groove at the nozzle output end creates an 80-120° fan-shaped spray of the output medium, significantly increasing the contact area with steam compared to the elongated conical spray formed by traditional round-hole nozzles. This allows for more complete steam-water mass transfer, enabling faster and more thorough removal of oxygen from the water, thus improving deoxygenation efficiency and meeting the demands of industrial applications requiring high deoxygenation performance. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0033] Figure 2 This is a schematic diagram of the sealing unit structure of this utility model.

[0034] Figure 3 This is a schematic diagram of the sealing gasket structure of this utility model.

[0035] Figure 4 This is a schematic diagram of the nozzle distribution structure on the rotary film tube of this utility model.

[0036] Figure 5 This is a structural view of the nozzle of this utility model.

[0037] The markings in the diagram are as follows:

[0038] 1. Outer shell; 2. Manhole; 3. Deaerator; 4. Rotary film tube; 5. Cover; 6. Sealing unit; 60. Sealing shell; 600. First opening; 601. Second opening; 61. Blind cap nut; 62. Sealing washer; 620. Ring body; 621. Axial support frame; 622. Sealing layer; 7. Nozzle; 8. Flared groove. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0041] Overall device

[0042] Outer Shell 1: Outer shell 1 constitutes the deaerator water tank, with a maintenance manhole 2 at one end. Outer shell 1 is welded from a cylindrical body and a stamped elliptical end cap. To ensure good high-temperature resistance, high-pressure resistance, and corrosion resistance, low-carbon steel or stainless steel is selected as the material for outer shell 1. The thickness of the cylindrical body is designed according to the working pressure and volume of the device, generally between 8-15mm. An insulation layer is installed on the outside of outer shell 1, using rock wool or aluminum silicate insulation materials, with a thickness of 50-100mm, to reduce heat loss inside outer shell 1 and improve the thermal efficiency of the device.

[0043] Deaerator 3: Deaerator 3 is mounted on the outer shell 1 and connected to the outer shell 1 via a flange. A sealing gasket is installed at the flange connection to ensure a tight seal. The interior of deaerator 3 contains a packing layer made of stainless steel Pall rings or stepped rings. These packing materials have a large specific surface area and good gas-liquid contact performance, enhancing the mass transfer between gas and water. An exhaust pipe is installed at the top of deaerator 3 to discharge non-condensable gases generated during the deaeration process.

[0044] The swirl film generator assembly comprises a swirl film tube 4, a water chamber, a steam chamber, a condensate inlet pipe, a makeup water inlet pipe, and a primary steam inlet pipe. The swirl film generator assembly is distributed within the outer shell 1 and the deaerator tower 3, with a portion of the swirl film tube 4 located inside the outer shell 1 and the other portion extending into the deaerator tower 3. The water chamber is connected to the condensate inlet pipe and the makeup water inlet pipe, used to introduce water to be deaerated into the swirl film generator assembly; the steam chamber is connected to the primary steam inlet pipe, used to introduce steam into the swirl film generator assembly. The swirl film tube 4 is made of seamless steel pipe, with the pipe diameter designed according to the processing capacity of the unit, generally between 50-150 mm.

[0045] Cover 5: Cover 5 is detachably fixed to the maintenance manhole 2 by bolts and nuts, and is used to seal the maintenance manhole 2. The material of cover 5 is the same as that of the outer shell 1 to ensure that it has the same temperature and pressure resistance. The thickness of cover 5 is 10-20mm to ensure that it has sufficient strength to withstand the pressure inside the device. Several bolt holes are evenly distributed on cover 5 for installing bolts.

[0046] Sealing unit 6

[0047] The sealing unit 6 covers the outer ends of the bolt and nut to seal the gap between the bolt / nut and the cover 5 / access manhole 2. The sealing unit 6 includes a sealing shell 60, a blind cap nut 61, and a sealing washer 62.

[0048] Sealing shell 60: It has a hollow structure, with a first opening 600 and a second opening 601 at each end. The sealing shell 60 is made of stainless steel, providing good corrosion resistance and strength. The inner diameter of the sealing shell 60 is larger than the diameter of the bolt to ensure smooth bolt passage.

[0049] Blind cap nut 61: Located on the outer end of the bolt and threaded to the outer end of the bolt. The blind cap nut 61 is made of high-strength alloy steel, which can withstand large tightening forces and ensure the durability of the sealing effect.

[0050] Sealing gasket 62: Two gaskets are provided, one between the blind cap nut 61 and the sealing shell 60, and the other between the sealing shell 60 and the surface of the cover 5. The sealing gasket 62 includes a ring body 620, which is a hollow ring and consists of upper and lower parts connected by welding or gluing. A honeycomb-shaped axial support frame 621 is provided inside the ring body 620. The axial support frame 621 is made of metal, preferably an alloy such as titanium alloy, which improves the compressive strength of the sealing gasket 62. Both the upper and lower surfaces of the ring body 620 are provided with a sealing layer 622, which is made of elastic materials such as nitrile rubber or fluororubber, providing good sealing performance and temperature resistance. Furthermore, the axial support frame 621 is filled with a polymer filler, such as polytetrafluoroethylene or silicone, further improving the sealing performance and elasticity of the sealing gasket 62.

[0051] Nozzle 7

[0052] Nozzle 7 is mounted on the swirl tube 4, and its output end has a flared groove 8 in the shape of ">". The output end of nozzle 7 is threaded for connection with the swirl tube 4, and the flared groove 8 is used to shape the output medium into an 80-120° fan-shaped spray. Nozzle 7 is made of stainless steel, providing good corrosion resistance and wear resistance. The number of nozzles 7 is determined according to the length of the swirl tube 4.

[0053] Working principle

[0054] The working principle of the sealing unit 6 is as follows: After the cover 5 is fixed to the manhole 2 by bolts and nuts, the sealing shell 60 is placed over the outer end of the bolt, so that the outer end of the bolt passes through the second opening 601 and the first opening 600 of the sealing shell 60 in sequence. Then, the blind cap nut 61 is tightened on the outer end of the bolt. During the tightening process, the blind cap nut 61 generates axial pressure on the sealing shell 60, causing the sealing shell 60 to move towards the surface of the cover 5. Since sealing washers 62 are provided between the blind cap nut 61 and the sealing shell 60, and between the sealing shell 60 and the surface of the cover 5, the sealing washers 62 deform under pressure, and the sealing layer 622 on its surface can tightly fit between the contact surfaces, filling the tiny gaps. At the same time, the honeycomb axial support frame 621 inside the sealing washer 62 can provide a certain support force to prevent the sealing washer 62 from deforming excessively and losing its sealing effect. The polymer filler in the axial support frame 621 can also further enhance the sealing performance. This multi-layered sealing structure effectively blocks the gap between the bolts / nuts and the cover 5 / manhole 2, preventing the leakage of internal steam.

[0055] Working principle of nozzle 7: The water to be deoxygenated enters the water chamber through the condensate inlet and the makeup water inlet, and then flows into the swirl film tube 4. Inside the swirl film tube 4, the water is heated and agitated by steam, forming a rotating water film. When the water is sprayed out through nozzle 7 on the swirl film tube 4, the water is dispersed into a fan-shaped spray of 80-120° due to the ">" shaped flared groove 8 at the output end of nozzle 7. Compared with the traditional slender cone spray, this fan-shaped spray greatly increases the contact area with steam, making the steam-water mass transfer more complete. After the steam comes into full contact with the water, it can quickly carry away the oxygen in the water, thereby improving the deoxygenation efficiency.

[0056] The overall working principle of the device is as follows: After the deoxygenated water enters the water chamber, it is sprayed out in a fan-shaped spray form through the nozzles 7 on the swirl film tube 4, making full contact with the steam entering the steam chamber from the primary steam inlet pipe within the deoxygenation tower 3. During the contact process, the steam transfers heat to the water, causing the water to reach its saturation temperature. Non-condensable gases such as oxygen in the water are released and rise with the steam, exiting through the exhaust pipe at the top of the deoxygenation tower 3. The deoxygenated water falls into the outer shell 1 (deoxygenated water tank) for storage. At the same time, the water in the outer shell 1 will further deoxygenate with steam from other parts of the swirl film unit, ensuring the deoxygenation effect.

[0057] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An atmospheric deoxygenation device, comprising: The outer casing (1) has a maintenance manhole (2) at one end, and the outer casing (1) constitutes a deoxygenated water tank; Deoxygenation tower (3), which is installed on the outer shell (1); A swirl film generator assembly, comprising a swirl film tube (4), is distributed within the outer shell (1) and the deaerator tower (3); Its characteristic is that it further includes: Cover (5), which is detachably fixed to the maintenance manhole (2) by bolts and nuts for sealing the maintenance manhole (2); A sealing unit (6) covers the outer ends of the bolts and nuts to seal the gap between the bolts / nuts and the cover (5) / access manhole (2).

2. The atmospheric deoxygenation device according to claim 1, characterized in that, The sealing unit (6) further includes: A sealing shell (60) has a hollow structure, and a first opening (600) and a second opening (601) are respectively provided at both ends of the sealing shell (60); A blind cap nut (61) is provided at the outer end of the bolt and threadedly connected to the outer end of the bolt; Two sealing washers (62) are respectively disposed between the blind cap nut (61) and the sealing shell (60), and between the sealing shell (60) and the surface of the cover (5); The sealing shell (60) covers the outer end of the bolt, and the outer end of the bolt passes through the second opening (601) and the first opening (600) in sequence. The blind cap nut (61) is tightened on the outer end of the bolt and then pressed on the outer end of the sealing shell (60) and presses the sealing shell (60) on the surface of the cover (5).

3. An atmospheric deoxygenation device according to claim 2, characterized in that, The sealing gasket (62) also includes: The ring body (620) is hollow and has a honeycomb-shaped axial support frame (621) inside. The upper and lower surfaces of the ring body (620) are provided with a sealing layer (622).

4. An atmospheric deoxygenation device according to claim 3, characterized in that, Also includes: A polymer filler is provided in the axial support frame (621).

5. An atmospheric deoxygenation device according to claim 1, characterized in that, Also includes: Nozzle (7), the nozzle (7) is disposed on the swirl tube (4), and the output end of the nozzle (7) has a flared groove (8) in the shape of ">”; The nozzle (7) has a threaded output end for connecting to the swirl tube (4), and the flared groove (8) is used to shape the output medium into an 80-120° fan-shaped spray.

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