Double-layer cyclone gas-liquid separator

Abstract

The utility model provides a double-layer cyclone gas-liquid separator, which relates to the technical field of separators and comprises an ammonia distillation tower body, a low-cover-cylinder flow divider is arranged at the top end in the ammonia distillation tower body, a double-layer cyclone separation device is arranged in the low-cover-cylinder flow divider, and a circular blind plate is arranged at the bottom of the double-layer cyclone separation device. A rotational flow plate cover cylinder is arranged on the outer side of the circular blind plate, a rotational flow plate space is arranged on the inner side of the double-layer rotational flow separation device, a downcomer is arranged at the bottom of the rotational flow plate space, a collecting disc is arranged at the bottom end in the ammonia still body, liquid blocking covers are arranged on the two sides of the rotational flow plate space, a water outlet is formed in one side of the ammonia still body, and the double-layer rotational flow plate separation device is arranged in the ammonia still body. The purpose of eliminating or reducing liquid drops causing corrosion or blockage to equipment is achieved.

Description

Technical Field

[0001] This utility model relates to the field of separator technology, and in particular to a double-layer cyclone gas-liquid separator. Background Technology

[0002] According to Chinese Patent Publication No. CN112521984A, a gas purification system using a cyclone plate gas-liquid separator includes a cylinder, a lower end conduit, a cyclone plate, a cyclone separation chamber, and an exhaust port. The cyclone separation chamber is installed at the center of the top of the cylinder, and a cyclone plate is provided at the center of the bottom of the cyclone separation chamber. A lower end conduit is provided at the end of the cyclone plate away from the cyclone separation chamber. A downcomer is fixed at the bottom of the cyclone separation chamber on one side of the lower end conduit. An exhaust port is provided at the center of the top of the cylinder, and the bottom of the exhaust port extends into the interior of the cylinder and connects to the top of the cyclone separation chamber. An air inlet is provided on the outer wall of one side of the cylinder, and one end of the air inlet extends into the interior of the cylinder. An air injection pipe is installed at the end of the air inlet away from the cylinder.

[0003] The aforementioned comparative documents and existing technologies have the following technical problems: Separators are widely used in large sieve plate ammonia stripping towers with a diameter of φ2800mm or more in soda ash plants. Due to various reasons, the use of separators can effectively control the liquid carryover of ammonia gas at the outlet, which seriously leads to some mother liquor being carried into the condensate, increasing the salt content of the waste dilute liquid, thereby affecting the control of salt content in heavy soda ash and causing material imbalance, ultimately leading to increased unit cost and affecting product quality. In the original ammonia stripping tower of soda ash plant, the space of the liquid blocking and gas-liquid separation device at the outlet of the tower is too small, and the airflow resistance is too large, causing the cap to be blown over, resulting in the gas directly entering the condenser at the top of the tower. The heat exchange tubes of the condenser at the top of the tower are arranged vertically in a tube-and-tube manner, and the gas passes directly through the condenser tubes without resistance, so a large amount of liquid droplets entrained in the gas are carried out. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a double-layer cyclone gas-liquid separator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a double-layer cyclone gas-liquid separator, comprising an ammonia stripping tower body, a low-profile distributor located at the top of the inner side of the ammonia stripping tower body, a double-layer cyclone separation device located inside the low-profile distributor, a circular blind plate located at the bottom of the double-layer cyclone separation device, a cyclone plate cover located outside the circular blind plate, a cyclone plate space located inside the double-layer cyclone separation device, a downcomer located at the bottom of the cyclone plate space, a collection tray located at the bottom of the inner side of the ammonia stripping tower body, liquid baffles located on both sides of the cyclone plate space, and a water outlet located on one side of the ammonia stripping tower body.

[0006] Preferably, the top of the low-profile distributor is provided with a heating and decomposition section top cover, the bottom of the low-profile distributor is provided with a bottom plate, and the bottom end of the bottom plate is provided with a reinforcing cylinder.

[0007] Preferably, the bottom of the heating and decomposition section top cover is provided with a connecting foot, and the reinforcing cylinder at the bottom end of the base plate is connected to the connecting foot of the heating and decomposition section top cover by welding.

[0008] Preferably, the double-layer cyclone separator includes an upper cyclone plate, the top of which is provided with blades, and the side of which is provided with a side flow plate.

[0009] Preferably, the outer side of the swirl plate shroud is provided with an outer cylinder, the bottom of the double-layer swirl separation device is provided with a swirl plate base, and a side flow plate is provided between the bottom end of the swirl plate shroud and the swirl plate base. There are a total of 20 side flow plates, the flow measurement direction is consistent with the airflow direction of the swirl plate, and the side flow plates overlap each other by 10mm.

[0010] Preferably, the height of the shroud of the low-profile distributor is just enough to close the outer edge of the blades. The blades are provided with 24 blades, and the 24 blades are arranged with an angle of 20 degrees between the blade and the bottom surface. The acute angle of the blade is tilted upward, and the horizontal projection of the tilted edge of the blade is about 10mm away from the bottom edge of the adjacent edge. The vertical height from the obtuse angle end of the blade to the horizontal plane of the circular blind plate is the same as the height of the shroud.

[0011] Preferably, the interior of the ammonia stripping tower is provided with a cap, the bottom of the top cover of the heating and decomposition section is provided with a flange ring, and the top of the flange ring is provided with a perforation.

[0012] Beneficial effects

[0013] This invention employs a double-layer cyclone plate separator, a novel type of defoaming device. This double-layer cyclone plate separator maintains stable separation performance even under conditions of significant changes in the flow state of the ammonia vapor, while achieving a scale-free and low-resistance effect during operation. Through gas-liquid separation, it effectively improves the purity of ammonia and prevents corrosion of ammonia pipelines.

[0014] In this invention, a collection tray is used, and the useful liquid separated by the double-layer cyclone plate separator is lowered into the collection tray through a downcomer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a top view of the double-layer cyclone gas-liquid separation device of this utility model.

[0017] Legend:

[0018] 1. Ammonia stripping tower body; 2. Low-profile distributor; 201. Heating and decomposition section top cover; 202. Bottom plate; 203. Reinforcing cylinder; 3. Double-layer cyclone separator; 301. Upper cyclone plate; 3011. Blade; 302. Side flow plate; 4. Circular blind plate; 5. Cyclone plate cover; 501. Outer cylinder; 6. Cyclone plate space; 7. Downcomer; 8. Collection tray; 9. Liquid baffle; 10. Water outlet. Detailed Implementation

[0019] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0020] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0022] Reference Figure 1-2This utility model provides a double-layer cyclone gas-liquid separator, including an ammonia stripping tower body 1. A low-profile distributor 2 is located at the top of the inner part of the ammonia stripping tower body 1. A double-layer cyclone separator 3 is located inside the low-profile distributor 2. A circular blind plate 4 is located at the bottom of the double-layer cyclone separator 3. A cyclone plate cover 5 is located outside the circular blind plate 4. A cyclone plate space 6 is located inside the double-layer cyclone separator 3. A downcomer 7 is located at the bottom of the cyclone plate space 6. A collection tray 8 is located at the bottom of the inner part of the ammonia stripping tower body 1. Liquid baffles 9 are located on both sides of the cyclone plate space 6. A water outlet 10 is located on one side of the ammonia stripping tower body 1. The height of the cover of the low-profile distributor 2 is just enough to close the blades 3011. The outer edge has 24 blades 3011, arranged at a 20-degree angle between the blade 3011 and the bottom surface. The acute angle of the blade 3011 faces upward, and the gap between the horizontal projection of the blade 3011's upward-facing edge and the bottom edge of the adjacent edge is approximately 10mm. The vertical height from the obtuse angle end of the blade 3011 to the horizontal plane of the circular blind plate 4 is the same as the height of the shroud. The airflow passes from bottom to top through the swirl plate space 6, throwing the droplets toward the tower wall. To ensure the normal passage of airflow in the swirl section and to better stabilize the upper swirl plate 301, a ring of side flow plates 302 is added between the lower end of the swirl plate shroud 5 and the swirl plate base. There are 20 side flow plates 302 in total, and the flow direction is the same as the airflow direction of the swirl plate. The side flow plates 302 overlap by 10mm, allowing airflow to pass through the gaps between the plates to form a vortex, throwing droplets towards the tower wall. Two airflow streams are thrown towards the slightly conical tower wall, and the droplets, due to impact with the wall and gravity, flow down the tower wall and accumulate in the collection tray 8, where they are collected by the downcomer 7. During construction and installation, the inner cap and supports of the ammonia stripping tower #37 are first removed. Then, eight φ20mm perforations are drilled on the Φ1000mm flange ring of the top cover 201 of the heating and decomposition section to fix the double-layer vortex separator 3. Because the vortex separator 3 uses double-layer vortex plates on the top and sides, the flow velocity and flow rate are extremely high. Furthermore, this section is subject to strong scouring and corrosion. Therefore, the vortex plate blades 3... The thickness of 011 is 10mm thicker than that of the conventional 3011 cyclone blade, and the material is 316L stainless steel. The base plate 202 is made of 16mm 316L stainless steel. Because the base support flange is about 1300mm thick and the outer cylinder 501 is 1800mm thick, the stability and strength are insufficient if it is too thin. A reinforcing cylinder 203 is added below the base plate 202 and welded to the connecting foot of the heating and decomposition section top cover 201 to prevent the airflow from blowing the cyclone plate over. This installation of two layers of cyclone plates can increase the air-liquid separation efficiency without generating resistance, achieving the best effect with minimal pressure drop. The separation efficiency of liquid droplets larger than 18um can reach 99%. Specific Implementation Example 2:

[0024] Reference Figure 1A special flow guiding device is set between the double-layer cyclone plates to effectively prevent flooding under high flow conditions, ensuring stable operation of the separator over a wide flow range and expanding the applicable operating conditions of the equipment.

[0025] In summary:

[0026] 1. The double-layer cyclone separator 3 is used to eliminate or reduce droplets that cause corrosion or blockage to the equipment;

[0027] 2. The use of downcomer 7 and collection tray 8 enables the recovery of useful liquid;

[0028] 3. The use of a double-layer cyclone separator 3 improves the purity of the gas for subsequent process operations;

[0029] 4. The use of a double-layer cyclone separator 3 enables the separation of harmful droplets from the reaction gas.

[0030] Ensure operational safety.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. Double cyclone gas-liquid separator comprising an ammonia stripping column body (1), characterized in that: The inside top end of the ammonia distillation tower body (1) is provided with a low cover cylinder distributor (2), the inside of the low cover cylinder distributor (2) is provided with a double-layer cyclone separation device (3), the bottom of the double-layer cyclone separation device (3) is provided with a circular blind plate (4), the outside of the circular blind plate (4) is provided with a cyclone plate cover cylinder (5), the inside of the double-layer cyclone separation device (3) is provided with a cyclone plate space (6), the bottom of the cyclone plate space (6) is provided with a downcomer (7), the inside bottom end of the ammonia distillation tower body (1) is provided with a collection disc (8), the two sides of the cyclone plate space (6) are provided with liquid blocking covers (9), one side of the ammonia distillation tower body (1) is provided with a water outlet (10).

2. The dual-stage cyclonic gas-liquid separator of claim 1, wherein: The top of the low cover cylinder distributor (2) is provided with a heating decomposition section top cover (201), the bottom of the low cover cylinder distributor (2) is provided with a bottom plate (202), and the bottom end of the bottom plate (202) is provided with a reinforcing cylinder (203).

3. The dual-stage cyclonic gas-liquid separator of claim 2, wherein: The bottom of the heating decomposition section top cover (201) is provided with a connecting foot, and the reinforcing cylinder (203) at the bottom end of the bottom plate (202) is connected with the connecting foot of the heating decomposition section top cover (201) through welding.

4. The dual-stage cyclonic gas-liquid separator of claim 1, wherein: The double-layer cyclone separation device (3) comprises an upper-layer cyclone plate (301), the top of the upper-layer cyclone plate (301) is provided with a blade (3011), and the side of the upper-layer cyclone plate (301) is provided with a side flow plate (302).

5. The dual-stage cyclonic gas-liquid separator of claim 1, wherein: The outside of the cyclone plate cover cylinder (5) is provided with an outer cylinder (501), the bottom of the double-layer cyclone separation device (3) is provided with a cyclone plate base, and the bottom end of the cyclone plate cover cylinder (5) and the cyclone plate base are provided with a side flow plate (302) therebetween, the side flow plate (302) is 20 pieces, the flow direction of the side flow plate (302) is consistent with the airflow direction of the cyclone plate, and the side flow plates (302) are overlapped by 10 mm.

6. The dual-stage cyclonic gas-liquid separator of claim 4, wherein: The cover cylinder height of the low cover cylinder distributor (2) is just closed to the outer edge of the blade (3011), the blade (3011) is provided with 24 pieces, the 24 pieces of blades (3011) are arranged at an angle of 20 degrees between the blade (3011) and the bottom surface, the acute angle side of the blade (3011) is upward, the horizontal projection surface of the upward side of the blade (3011) and the bottom side of the adjacent side are spaced by about 10 mm, and the vertical height from the obtuse angle end point of the blade (3011) to the horizontal surface of the circular blind plate (4) is the same as the cover cylinder.

7. The dual-stage cyclonic gas-liquid separator of claim 3, wherein: The inside of the ammonia distillation tower body (1) is provided with a cover cap, the bottom of the heating decomposition section top cover (201) is provided with a flange ring, and the top of the flange ring is provided with a perforation.

Images