Exhaust pipe filter collection device

Abstract

This disclosure pertains to the field of nuclear power technology, specifically relating to an exhaust pipe filtration and collection device. The exhaust pipe filtration and collection device provided by this disclosure, through the cooperation of multiple upper and lower filters within the inlet pipe and multiple baffles within the inlet pipe, can be conveniently installed on the exhaust pipeline of a resin trap. It filters and collects impurities and moisture discharged from the resin trap during depressurization, preventing them from entering the working environment; the collection bag is easy to replace and simple to use.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power technology, specifically relating to an exhaust pipe filtration and collection device. Background Technology

[0002] In the condensate treatment system of a nuclear power plant, the pressure changes continuously during the resin regeneration process. The pressure of the resin trap connected to the resin regeneration tower discharge pipeline also increases intermittently. When the pressure of the resin trap is higher than atmospheric pressure, it will release pressure into the air through the exhaust pipe.

[0003] Because the resin trap collects impurities and broken resin from wastewater during use, if the pressure suddenly changes during the process of depressurizing the resin trap into the air through the exhaust pipe, the impurities and broken resin will be sprayed out of the system along with a large amount of water vapor through the exhaust pipe, polluting the working environment. Summary of the Invention

[0004] To overcome the problems existing in the related technology, an exhaust pipe filter collection device is provided, the device comprising: an outlet pipe and an inlet pipe;

[0005] The outlet pipe and the inlet pipe are connected to each other in an L-shaped arrangement. The outlet pipe is arranged upward and outward. Multiple baffles are alternately welded inside the outlet pipe. The inlet pipe is set horizontally. The air inlet end of the inlet pipe is connected to the exhaust pipe. Multiple upper filters and multiple lower filters are alternately welded inside the inlet pipe. The upper end of each upper filter is fixedly connected to the upper side of the inner wall of the inlet pipe, and the lower end of each lower filter is fixedly connected to the lower side of the inner wall of the inlet pipe.

[0006] A collection hole is opened on the side wall of the inlet pipe near the bottom of each lower filter screen facing the air inlet. The collection trough is fixedly installed on the lower outside of the inlet pipe and faces multiple collection holes. The collection trough is connected to the collection bag through a drainage pipe.

[0007] Multiple baffles are horizontally and alternately installed inside the outlet pipe to make the airflow flow in an S-shape. A small amount of water droplets can flow back to the inlet pipe under the action of gravity and enter the collection tank through the collection hole.

[0008] In one possible implementation, the upper filter and multiple lower filters are tilted at a preset angle toward the air intake.

[0009] In one possible implementation, the filtration accuracy of the upper filter and multiple lower filters is 100±30±μm.

[0010] In one possible implementation, the upper and lower filters are independent of each other, not connected, and arranged vertically.

[0011] In one possible implementation, the first connecting weld between one end of each baffle and the inner wall of the outlet pipe is arc-shaped, and the other end of each baffle is horizontally positioned and suspended inside the outlet pipe.

[0012] In one possible implementation, the second connecting weld between the upper end of each upper filter screen and the inner wall of the inlet pipe is arc-shaped, and the second connecting weld between the lower end of each lower filter screen and the inner wall of the inlet pipe is also arc-shaped. The middle and lower part of each upper filter screen and the middle and upper part of each lower filter screen are suspended in the outlet pipe and tilted towards the air inlet end.

[0013] In one possible implementation, an inverted U-shaped monitoring tube is installed on the drainage tube.

[0014] In one possible implementation, the exhaust pipe filter collection device is made entirely of carbon steel Q345R.

[0015] In one possible implementation, the upper filter, lower filter, and baffle are made of stainless steel S31608.

[0016] In one possible implementation, the collection bag is made of polyester fiber.

[0017] The beneficial effects of this disclosure are as follows: The exhaust pipe filter collection device provided by this disclosure can be conveniently installed on the exhaust pipe of the resin catcher by means of multiple upper and lower filter screens in the inlet pipe and multiple baffles in the inlet pipe, so as to filter and collect the impurities and moisture discharged by the resin catcher during the depressurization process and prevent them from entering the working environment; the collection bag is easy to replace and simple to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an exhaust pipe filter collection device shown in an embodiment of the present disclosure.

[0019] Figure 2 This is a schematic diagram of the first connecting weld shown in an embodiment of this disclosure.

[0020] Figure 3 This is a schematic diagram of the second connecting weld as shown in an embodiment of this disclosure.

[0021] Figure 4 This is a schematic diagram illustrating the gas flow direction during depressurization of an exhaust pipe filter collection device according to an embodiment of this disclosure.

[0022] In the picture:

[0023] 1-Inlet pipe; 2-Upper filter screen; 3-Lower filter screen; 4-Collection hole; 5-Collection tank; 6-Monitoring pipe;

[0024] 7-Collection bag; 8-Wastewater ditch; 9-Baffle plate; 10-Outlet pipe; 11-Drainage pipe;

[0025] 12 - First connecting weld; 13 - Second connecting weld. Detailed Implementation

[0026] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains; the terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the term "comprising" and any variations thereof in this disclosure are intended to cover non-exclusive inclusion. Clearly, the embodiments described in this disclosure are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0028] In this disclosure, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] Figure 1 This is a schematic diagram of an exhaust pipe filter collection device shown in an embodiment of this disclosure, such as... Figure 1 As shown, the device includes an outlet pipe 10 and an inlet pipe 1; the outlet pipe 10 and the inlet pipe 1 are connected to each other in an L-shaped arrangement. The outlet pipe 10 is arranged upwards and faces the air. Multiple baffles 9 are alternately welded inside the outlet pipe 10. The inlet pipe 1 is horizontally arranged, and the air inlet end of the inlet pipe 1 is connected to the exhaust pipeline. Multiple upper filters 2 and multiple lower filters 3 are alternately welded inside the inlet pipe 1. The upper end of each upper filter 2 is fixedly connected to the upper side of the inner wall of the inlet pipe 1, and the lower end of each lower filter 3 is fixedly connected to the lower side of the inner wall of the inlet pipe 1. A collection hole 4 is opened on the side wall of the inlet pipe 1 near the bottom of each lower filter 3 facing the air inlet end. A collection trough 5 is fixedly installed on the lower outer side of the inlet pipe 1, directly opposite the multiple collection holes 4. The collection trough 5 is connected to a collection bag 7 through a drainage pipe 11 (the collection bag 7 is fixed to the drainage pipe 11, for example, by a buckle). An inverted U-shaped monitoring tube 6 is installed above the collection bag 7.

[0030] Multiple baffles 9 are horizontally and alternately installed inside the outlet pipe 10 to make the airflow flow in an S-shape. A small amount of water droplets can flow back to the inlet pipe 1 under the action of gravity and enter the collection tank 5 through the collection hole 4.

[0031] The water vapor impurities discharged from the resin trap enter the inlet pipe 1 horizontally. Due to gravity, the overall distribution from top to bottom is roughly air, water vapor, and solid impurities. After the gas containing impurities passes through the upper filter screen 2 and the lower filter screen 3, the solid impurities are trapped by the filter screens. The water vapor and air will drop sharply after passing through the filter screen holes and flow directly towards the filter screen, forming a disturbance with some unfiltered gas, continuously reducing the gas flow rate, causing the water vapor carried in the air to settle into water droplets.

[0032] Since the filter screen can change the direction of some gas flow, some gas passes through the collection hole 4, which can blow away the impurities and water that settle in the collection tank 5, and allow the impurities and water to enter the collection bag 7 through the drainage pipe 11. The collection bag 7 can trap solid impurities, and the water flows into the wastewater ditch 8 through the collection bag 7.

[0033] In one possible implementation, the upper filter 2 and multiple lower filters 3 are tilted at a predetermined angle (e.g., 45°) toward the air inlet. The upper filter 2 and multiple lower filters 3 can be made of, for example, stainless steel, with a filtration accuracy of 100±30μm, used to trap solid impurities. In another possible implementation, the lower filter 3 is installed first at the connection between the inlet pipe 1 and the outlet pipe 10, followed by the alternating installation of the upper filter 2 and the lower filters 3. The upper filter 2 and the lower filters 3 are independent of each other, not connected, and arranged vertically.

[0034] In one possible implementation, such as Figure 2 As shown, the first connecting weld 12 between one end of each baffle and the inner wall of the outlet pipe is arc-shaped, and the other end of each baffle is horizontally positioned and suspended inside the outlet pipe; as shown... Figure 3 As shown, the second connecting weld between the upper end of each upper filter screen and the inner wall of the inlet pipe is arc-shaped, and the second connecting weld between the lower end of each lower filter screen and the inner wall of the inlet pipe is also arc-shaped. The middle and lower part of each upper filter screen and the middle and upper part of each lower filter screen are suspended in the outlet pipe and tilted towards the air inlet end.

[0035] An inverted U-shaped monitoring tube 6 is installed on the drainage pipe 11. No valve is required; when water splashes into the monitoring tube 6, the inverted U-shaped structure allows the water to flow back into the drainage pipe. When there are many impurities in the collection bag 7, water cannot pass through it, and the water level rises in the drainage pipe 11. When the water level is higher than that in the monitoring tube 6, water continuously flows from the monitoring tube 6 into the wastewater ditch 8. At this point, the collection bag can be directly replaced for reuse.

[0036] In one possible implementation, the exhaust pipe filter collection device disclosed herein is made entirely of carbon steel Q345R, the upper filter screen, the lower filter screen, and the baffle plate are made of stainless steel S31608, and the collection bag is made of polyester fiber.

[0037] In one application example, when the resin trap is depressurized, the depressurized airflow carrying impurities and moisture enters the inlet pipe horizontally. Inside the inlet pipe, the airflow encounters a lower filter screen. Under gravity, a large proportion of the impurities and moisture are located at the bottom of the airflow. The filter screen can intercept solid impurities and most of the moisture, and change the airflow direction. Part of the airflow carrying impurities and moisture enters the collection hole along the direction parallel to the filter screen, thereby blowing away impurities and moisture into the collection bag; part of the airflow passes through the filter screen, with the airflow direction perpendicular to the lower filter screen. At the top of the pipe, the airflow encounters an upper filter screen. Most of the airflow passes through the upper filter screen and enters the rear section, with the airflow direction perpendicular to the upper filter screen and parallel to the lower filter screen. This creates a shearing force with the impurities on the filter screen, guiding the impurities into the collection hole; a small portion of the airflow flows obliquely downward along the direction parallel to the upper filter screen, creating a countercurrent turbulence with the airflow passing through the lower filter screen, thereby reducing the overall airflow velocity.

[0038] The alternating arrangement of the lower and upper filters ensures that all impurities are trapped in front of the lower filter and enter the collection bag through the collection holes. The filters trap most of the moisture, while a small amount of water vapor enters the outlet pipe with the airflow. There, it collides with the multi-layer baffles inside the outlet pipe to form water droplets, which then flow back to the inlet pipe under gravity when there is no airflow. Finally, all the water also enters the wastewater ditch through the collection bag. When there are many impurities in the collection bag, it will obstruct the passage of water. If the water level rises above the monitoring pipe, water will flow out through the monitoring pipe. At this time, the collection bag needs to be replaced or cleaned. When the water level does not reach the height of the monitoring pipe, the inverted U-shaped design can prevent splashed water from flowing out through the monitoring pipe, thus avoiding false readings.

[0039] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An exhaust pipe filter and collection device, characterized in that, The device includes: an outlet pipe and an inlet pipe; The outlet pipe and the inlet pipe are connected to each other in an L-shaped arrangement. The outlet pipe is arranged upward and outward. Multiple baffles are alternately welded inside the outlet pipe. The inlet pipe is set horizontally. The air inlet end of the inlet pipe is connected to the exhaust pipe. Multiple upper filters and multiple lower filters are alternately welded inside the inlet pipe. The upper end of each upper filter is fixedly connected to the upper side of the inner wall of the inlet pipe, and the lower end of each lower filter is fixedly connected to the lower side of the inner wall of the inlet pipe. A collection hole is opened on the side wall of the inlet pipe near the bottom of each lower filter screen facing the air inlet. The collection trough is fixedly installed on the lower outside of the inlet pipe and faces multiple collection holes. The collection trough is connected to the collection bag through a drainage pipe. Multiple baffles are horizontally and alternately installed inside the outlet pipe to make the airflow flow in an S-shape. A small amount of water droplets can flow back to the inlet pipe under the action of gravity and enter the collection tank through the collection hole.

2. The apparatus according to claim 1, characterized in that, The upper filter and multiple lower filters are tilted at a preset angle toward the air intake.

3. The apparatus according to claim 1, characterized in that, The filtration accuracy of the upper filter and multiple lower filters is 100±30μm.

4. The apparatus according to claim 1, characterized in that, The upper and lower filters are independent of each other, not connected, and arranged vertically.

5. The apparatus according to claim 1, characterized in that, The first connecting weld between one end of each baffle and the inner wall of the outlet pipe is arc-shaped, and the other end of each baffle is horizontally set and suspended inside the outlet pipe.

6. The apparatus according to claim 1, characterized in that, The second connecting weld between the upper end of each upper filter screen and the inner wall of the inlet pipe is arc-shaped, and the second connecting weld between the lower end of each lower filter screen and the inner wall of the inlet pipe is also arc-shaped. The middle and lower part of each upper filter screen and the middle and upper part of each lower filter screen are suspended in the outlet pipe and tilted towards the air inlet end.

7. The apparatus according to claim 1, characterized in that, An inverted U-shaped monitoring tube is installed on the drainage tube.

8. The apparatus according to claim 1, characterized in that, The exhaust pipe filter collection device is made entirely of Q345R carbon steel.

9. The apparatus according to claim 1, characterized in that, The upper filter, lower filter, and baffle are made of stainless steel S31608.

10. The apparatus according to claim 1, characterized in that, The collection bags are made of polyester fiber.

Images