A demisting device for a vaporizer of a liquefied natural gas storage and dispensing station

Abstract

The utility model provides a kind of liquefied natural gas storage and distribution station gasifier demisting device, belong to gasifier demisting technical field, including tank, the one side of tank is provided with the demisting component that carries out high temperature elimination to mist, the bottom of tank is provided with the cleaning component that handles the dewdrop generated by condensation, the utility model is provided with the demisting component, realizes the heating removal effect of high efficiency to the mist around gasifier, the suction force generated by industrial fan operation, mist is inhaled into tank interior by rectangular pipe, forms downward airflow, while the high temperature hot air generated by hot air blower is transported to tank interior by flow guide pipe, so that low-temperature mist and high-temperature airflow are fully mixed, improve the evaporation efficiency of mist drop, air pump is cooperated with air outlet pipe, and processed dry gas is discharged from tank, improve the cleaning efficiency of mist.

Description

Technical Field

[0001] This utility model relates to the field of vaporizer demisting technology, and more specifically, to a vaporizer demisting device for liquefied natural gas storage and distribution stations. Background Technology

[0002] In liquefied natural gas (LNG) storage and distribution stations, the vaporizer is the core equipment that converts liquefied natural gas into gaseous natural gas. During the vaporization process, due to a sudden drop in local temperature, some of the gaseous natural gas will recondense into micron-sized droplets or mist-like substances. These suspended mist-like substances will accumulate around the vaporizer, leading to icing on the equipment surface. This icing not only reduces vaporization efficiency but may also cause equipment failure.

[0003] A search revealed that Chinese Patent Publication No. CN213824048U discloses "a vaporizer demisting device, comprising a tower body, a flow guide box installed on the lower side of the tower body, an intake port installed at one end of the flow guide box, a filter box installed inside the intake port, a negative pressure absorption fan installed in the middle of the tower body, an electric heating tube array installed below the negative pressure absorption fan, a guide pipe installed at the top of the tower body, a lower support foot installed below the flow guide box, and a shock-absorbing pad installed below the lower support foot. This utility model, through the electric heating tube array, whose heating tubes can remove small droplets in the airflow, and the baffles set inside the flow guide box, can remove solid particles and large-diameter droplets in the airflow, thereby achieving graded optimized combination of different loads and effectively improving demisting efficiency." However, it still has the following drawbacks:

[0004] When this device is in use, the insufficient residence time of the mist in the heating zone prevents the small droplets from fully evaporating. When dealing with high-humidity mist, the high humidity further reduces heating efficiency as the mist passes through the heating zone, resulting in uneven heating between the central and peripheral areas of the mist. This insufficient heating directly leads to some droplets not being effectively processed, thus affecting the overall demisting effect. Therefore, a demisting device for the vaporizer of a liquefied natural gas storage and distribution station is proposed. Utility Model Content

[0005] The purpose of this invention is to address the problem that insufficient residence time of fog in the heating zone leads to insufficient evaporation of small droplets. When dealing with high-humidity fog, the high humidity further reduces the heating efficiency as the fog passes through the heating zone, resulting in uneven heating between the central and peripheral areas of the fog. This insufficient heating directly leads to some droplets not being effectively processed, thus affecting the overall defogging effect.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] The present invention is as follows: a demisting device for a vaporizer in a liquefied natural gas storage and distribution station, comprising a tank body, a demisting component for high-temperature elimination of mist is provided on one side of the tank body, and a cleaning component for treating water droplets generated by condensation is provided at the bottom of the tank body;

[0008] The demisting assembly includes a connecting frame fixedly connected to one side of the tank body. An industrial fan is bolted to the inner wall of the connecting frame. A rectangular tube is fixedly connected to one side of the connecting frame. A hot air blower is bolted to the top of the tank body. A guide pipe is provided at the output end of the hot air blower. A fixing frame is fixedly connected to the outer wall of the tank body. An air pump is installed inside the fixing frame. A circular air duct is provided at the output end of the air pump. An air outlet pipe is fixedly connected to the top of the circular air duct. A filter screen is provided on the inner wall of the tank body.

[0009] As a preferred technical solution of this utility model, the cleaning component includes a drain pipe fixedly connected to the outer wall of the tank, a resistance wire is provided on the outer wall of the drain pipe, a fixing pipe is fixedly connected to the outer wall of the tank, a steam pipe is fixedly connected to the end of the drain pipe away from the tank, and a filter frame is fixedly connected to the end of the steam pipe away from the drain pipe.

[0010] As a preferred technical solution of this utility model, the inner walls of the rectangular tube and the guide tube are fixedly connected with air outlet plates, and multiple air outlet holes are opened on one side of the two air outlet plates.

[0011] As a preferred technical solution of this utility model, the inner wall of the tank is fixedly connected with multiple corrugated plates, and the multiple corrugated plates are circumferentially distributed along the central axis of the tank.

[0012] As a preferred technical solution of this utility model, a guide frame is fixedly connected to the top of the air outlet pipe, and multiple guide blades rotate on the inner wall of the guide frame.

[0013] As a preferred technical solution of this utility model, the outer wall of the tank is provided with an observation frame, and the interior of the observation frame is provided with tempered glass.

[0014] As a preferred technical solution of this utility model, the bottom of the tank is threaded with three threaded rods, the tops of the three threaded rods extend into the interior of the tank, and the bottoms of the three threaded rods are fixedly connected with support pads.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. The demisting component enables efficient heating and removal of mist around the vaporizer. The suction generated by the industrial fan draws the mist into the tank through the rectangular tube, creating a downward airflow. Simultaneously, the high-temperature hot air generated by the hot air blower is delivered into the tank through the guide pipe, allowing the low-temperature mist to mix fully with the high-temperature airflow, thus improving the evaporation efficiency of the mist droplets. The air pump and the exhaust pipe work together to discharge the treated dry gas from the tank, further enhancing the mist removal efficiency.

[0017] 2. The demisting component enables efficient heating of water droplets generated during mist heating. Heat is generated by energizing the resistance wire, which uniformly heats the condensate droplets in the drain pipe, causing them to vaporize rapidly. The steam pipe delivers the generated steam to the filter frame, where activated carbon and filter cotton effectively adsorb impurities, achieving efficient steam filtration and significantly improving the vaporization efficiency of the condensate droplets. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a demister device for a vaporizer in a liquefied natural gas storage and distribution station provided by this utility model;

[0019] Figure 2 One of the right-side cross-sectional structural schematic diagrams of a liquefied natural gas storage and distribution station vaporizer demisting device provided by this utility model;

[0020] Figure 3 The second schematic diagram of the right-side cross-sectional structure of a liquefied natural gas storage and distribution station vaporizer demister provided by this utility model;

[0021] Figure 4 A front cross-sectional structural schematic diagram of a liquefied natural gas storage and distribution station vaporizer demisting device provided by this utility model;

[0022] Figure 5 This utility model provides a demisting device for a vaporizer in a liquefied natural gas storage and distribution station. Figure 3 Enlarged view of the structure at point A in the middle.

[0023] The diagram shows: 1. Tank; 2. Demisting assembly; 3. Cleaning assembly; 201. Connecting frame; 202. Industrial fan; 203. Rectangular tube; 204. Hot air blower; 205. Guide pipe; 206. Fixing frame; 207. Air pump; 208. Circular duct; 209. Air outlet pipe; 210. Filter screen; 301. Drain pipe; 302. Resistance wire; 303. Fixing pipe; 304. Steam pipe; 305. Filter frame; 4. Air outlet plate; 5. Air outlet hole; 6. Corrugated plate; 7. Guide frame; 8. Guide vane; 9. Observation frame; 10. Tempered glass; 11. Threaded rod; 12. Support pad. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] like Figure 1 As shown, this embodiment proposes a demisting device for a vaporizer in a liquefied natural gas storage and distribution station, including a tank 1. A demisting component 2 for high-temperature elimination of mist is provided on one side of the tank 1, and a cleaning component 3 for treating water droplets generated by condensation is provided at the bottom of the tank 1.

[0029] like Figure 2 and Figure 3As shown, the demisting assembly 2 includes a connecting frame 201 fixedly connected to one side of the tank 1. An industrial fan 202 is bolted to the inner wall of the connecting frame 201, and a rectangular tube 203 is fixedly connected to one side of the connecting frame 201. When the industrial fan 202 is activated, the mist is drawn into the tank 1 through the rectangular tube 203. A hot air blower 204 is bolted to the top of the tank 1. A guide pipe 205 is provided at the output end of the hot air blower 204. When the hot air blower 204 is activated, hot air is blown out and transported through the guide pipe 205. The gas is fed into tank 1. A fixed frame 206 is fixedly connected to the outer wall of tank 1. An air pump 207 is installed inside the fixed frame 206. A circular air duct 208 is installed at the output end of the air pump 207. An air outlet duct 209 is fixedly connected to the top of the circular air duct 208. By starting the air pump 207, the gas processed in tank 1 is discharged from tank 1 through the air outlet duct 209. A filter screen 210 is installed on the inner wall of tank 1 to filter impurities contained in the water. After the industrial fan 202 inside the connecting frame 201 is started, the industrial fan 202 generates suction, drawing the mist suspended around the vaporizer into the interior of the tank 1 through the rectangular tube 203. At the same time, the hot air blower 204 is started, blowing out a high-temperature airflow, which is then delivered to the interior of the tank 1 through the guide pipe 205. Inside the tank 1, the mist and the high-temperature hot air form a forced convection circulation, allowing the tiny droplets in the mist to come into full contact with the hot air and evaporate. Subsequently, the suction pump 207 is started, drawing out the dried gas after high-temperature treatment through the circular air duct 208 and discharging it from the tank 1 through the air outlet pipe 209. During this process, some of the incompletely evaporated mist droplets condense upon cooling inside the tank, forming larger water droplets that sink to the bottom of the tank 1. The filter screen 210 installed inside the tank 1 can effectively filter impurities carried in the water droplets, significantly improving the mist treatment efficiency.

[0030] like Figure 3 and Figure 4As shown, the cleaning component 3 includes a drain pipe 301 fixedly connected to the outer wall of the tank 1. A resistance wire 302 is provided on the outer wall of the drain pipe 301. A fixing pipe 303 is fixedly connected to the outer wall of the tank 1. The water droplets in the drain pipe 301 are heated by energizing the resistance wire 302. A steam pipe 304 is fixedly connected to the end of the drain pipe 301 away from the tank 1. A filter frame 305 is fixedly connected to the end of the steam pipe 304 away from the drain pipe 301. The evaporated gas is filtered through filter cotton and activated carbon and other filter materials in the filter frame 305. After the mist and hot air are fully mixed in the tank 1, the condensed water droplets sink to the bottom of the tank 1 and flow into the drain pipe 301. At this time, the resistance wire 302 on the outer wall of the drain pipe 301 is energized and heats up, continuously heating the liquid in the pipe, causing the water droplets to evaporate quickly. The water vapor generated by evaporation then enters the steam pipe 304 and is transported to the filter frame 305. The filter cotton and activated carbon filling the filter frame 305 can effectively adsorb the residual liquid water droplets and impurities in the steam, ensuring that the discharged gas is clean and dry.

[0031] like Figure 4 As shown, air outlet plates 4 are fixedly connected to the inner walls of both the rectangular tube 203 and the guide tube 205, and multiple air outlet holes 5 are opened on one side of the two air outlet plates 4. When hot air and mist enter the tank 1 through the guide tube 205 and the rectangular tube 203 respectively, the air outlet holes 5 on the air outlet plates 4 will evenly and disperse the airflow into the tank 1, which not only makes the hot air and mist fully mixed in the tank 1, but also avoids the local airflow being too strong or too weak, thereby improving the heat exchange efficiency and enhancing the demisting effect.

[0032] like Figure 4 As shown, multiple corrugated plates 6 are fixedly connected to the inner wall of the tank 1, and the corrugated plates 6 are circumferentially distributed along the central axis of the tank 1. When the mist and hot air enter the tank 1, the airflow collides and contacts the corrugated plates 6, which not only prolongs the flow path of the airflow in the tank 1 and increases the contact time between the mist and hot air, but also significantly increases the contact area between the mist and hot air, allowing the hot air to heat the mist more thoroughly, thereby significantly improving the evaporation efficiency of the mist droplets.

[0033] like Figure 5 As shown, a guide frame 7 is fixedly connected to the bottom of the air outlet duct 209, and multiple guide vanes 8 rotate on the inner wall of the guide frame 7. When the demisted airflow is discharged from the tank 1 through the air outlet duct 209, the discharge direction of the airflow can be controlled by adjusting the rotation angle of the guide vanes 8, so that the airflow is evenly diffused out of the tank 1, avoiding the accumulation or uneven discharge of airflow. This not only optimizes the airflow distribution efficiency, but also ensures that the gas can be discharged stably and efficiently.

[0034] like Figure 4As shown, an observation frame 9 is provided on the outer wall of the tank 1, and a tempered glass 10 is provided inside the observation frame 9. Through the observation frame 9 and the tempered glass 10 on the tank 1, the elimination status of the mist inside the tank, the liquid level change, and the operation of the demisting component 2 can be monitored in real time to ensure the efficiency of demisting.

[0035] like Figure 4 As shown, three threaded rods 11 are threadedly connected to the bottom of the tank body 1. The tops of the three threaded rods 11 extend into the interior of the tank body 1, and the bottoms of the three threaded rods 11 are fixedly connected to support pads 12. The height and tilt angle of the tank body 1 can be adjusted by rotating the threaded rods 11 at the bottom of the tank body 1, which avoids the problem of the tank body 1 tilting or being under-height when defogging on uneven ground. At the same time, the support pads 12 at the bottom ensure the stability of the tank body 1.

[0036] Specifically, when the demisting device of the vaporizer in this liquefied natural gas storage and distribution station is in use: after starting the industrial fan 202 in the connecting frame 201, the industrial fan 202 generates suction, drawing the mist suspended around the vaporizer into the interior of the tank 1 through the rectangular pipe 203. At the same time, the hot air blower 204 is started, blowing out a high-temperature airflow, which is then transported to the interior of the tank 1 through the guide pipe 205. Inside the tank 1, the mist and the high-temperature hot air form a forced convection circulation, allowing the tiny droplets in the mist to fully contact the hot air and evaporate. Subsequently, the suction pump 207 is started, drawing out the dried gas after high-temperature treatment through the circular air pipe 208 and discharging it from the tank 1 through the air outlet pipe 209. During this process, some of the incompletely evaporated mist droplets condense upon cooling inside the tank, forming larger water droplets, which sink to the bottom of the tank 1. The filter screen 210 installed inside the tank 1 can effectively filter the impurities carried in the water droplets, which then flow into the drain pipe 301 (e.g., Figure 2 and Figure 3 (As shown); At this time, the resistance wire 302 on the outer wall of the drain pipe 301 is energized and heats up, continuously heating the liquid inside the pipe, causing the water droplets to evaporate rapidly. The resulting water vapor then enters the steam pipe 304 and is transported to the filter frame 305. Through the filter cotton and activated carbon filling the filter frame 305, the residual liquid water droplets and impurities in the steam can be effectively adsorbed, ensuring that the discharged gas is clean and dry (as shown). Figure 3 and Figure 4 (As shown in the figure); it greatly improves the efficiency of fog processing.

[0037] All technical features in this embodiment can be freely combined according to actual needs.

[0038] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A demister device for a vaporizer in a liquefied natural gas storage and distribution station, comprising a tank (1), characterized in that, A defogging component (2) for high-temperature elimination of fog is provided on one side of the tank (1), and a cleaning component (3) for treating water droplets generated by condensation is provided at the bottom of the tank (1). The demisting assembly (2) includes a connecting frame (201) fixedly connected to one side of the tank (1), an industrial fan (202) is bolted to the inner wall of the connecting frame (201), a rectangular tube (203) is fixedly connected to one side of the connecting frame (201), a hot air blower (204) is bolted to the top of the tank (1), a guide pipe (205) is provided at the output end of the hot air blower (204), a fixing frame (206) is fixedly connected to the outer wall of the tank (1), an air pump (207) is provided inside the fixing frame (206), a circular air duct (208) is provided at the output end of the air pump (207), an air outlet pipe (209) is fixedly connected to the top of the circular air duct (208), and a filter screen (210) is provided on the inner wall of the tank (1).

2. The demister device for a liquefied natural gas storage and distribution station vaporizer according to claim 1, characterized in that, The cleaning assembly (3) includes a drain pipe (301) fixedly connected to the outer wall of the tank (1), a resistance wire (302) is provided on the outer wall of the drain pipe (301), a fixing pipe (303) is fixedly connected to the outer wall of the tank (1), a steam pipe (304) is fixedly connected to the end of the drain pipe (301) away from the tank (1), and a filter frame (305) is fixedly connected to the end of the steam pipe (304) away from the drain pipe (301).

3. The demister device for a liquefied natural gas storage and distribution station vaporizer according to claim 1, characterized in that, The inner walls of the rectangular tube (203) and the guide tube (205) are fixedly connected with air outlet plates (4), and multiple air outlet holes (5) are opened on one side of the two air outlet plates (4).

4. The demister device for a liquefied natural gas storage and distribution station vaporizer according to claim 1, characterized in that, The inner wall of the tank (1) is fixedly connected with a plurality of corrugated plates (6), which are distributed circumferentially along the central axis of the tank (1).

5. A demister device for a liquefied natural gas storage and distribution station vaporizer according to claim 1, characterized in that, The top of the air outlet pipe (209) is fixedly connected to a guide frame (7), and the inner wall of the guide frame (7) has multiple guide blades (8) that rotate.

6. The demister device for a liquefied natural gas storage and distribution station vaporizer according to claim 1, characterized in that, The outer wall of the tank (1) is provided with an observation frame (9), and the interior of the observation frame (9) is provided with tempered glass (10).

7. A demister device for a vaporizer in a liquefied natural gas storage and distribution station according to claim 1, characterized in that, The bottom of the tank (1) is threaded with three threaded rods (11), the tops of the three threaded rods (11) extend into the interior of the tank (1), and the bottoms of the three threaded rods (11) are fixedly connected with support pads (12).

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