Antifoaming agent filling device for LNG (Liquefied Natural Gas) factory

Abstract

The utility model discloses an LNG (liquefied natural gas) factory defoaming agent filling device, which belongs to the technical field of defoaming agent filling and comprises a base, a solvent tank is fixed on the left side of the upper surface of the base, a metering pump is connected to the right side of the upper surface of the base through bolts, a motor is mounted at the top of the solvent tank through bolts, and a discharge pipe is fixedly arranged below the left side of the solvent tank; the defoaming agent filling device for the LNG factory further comprises a connecting pipe which is fixed between the solvent tank and the metering pump. According to the LNG factory defoaming agent filling device, a defoaming agent can be conveyed into the solvent box through the metering pump and the connecting pipe, quantitative feeding of the defoaming agent can be achieved, meanwhile, the motor drives the first stirring rod to rotate to stir and mix materials in the solvent box, and it can be guaranteed that the defoaming agent is in a dissolved state all the time in cooperation with pressurization of the metering pump; and the defoaming agent can be effectively fed into the amine liquid system, so that the foaming frequency and the foaming degree of the amine liquid system are reduced, and the overall stable operation of an LNG factory is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of defoaming agent filling, in particular to a defoaming agent filling device for an LNG plant. Background Art

[0002] The amine liquid system is an important unit for natural gas purification in LNG plants. The amine liquid system is unstable in operation, which can easily cause unqualified deacidification and even freeze-blocking of the cold box. In addition, the overall replacement cost of the amine liquid is high. Using the existing equipment of the LNG plant for transformation can effectively solve the problem and reduce investment. The main reason for the instability of the amine liquid system is the foaming of the amine liquid. The frequency and degree of foaming of the amine liquid can be effectively reduced by adding a defoaming agent. For example, the rapid defoaming agent filling device with the announcement number "CN216825846U" has the defoaming agent to be added placed in the receiving chamber, and the driving motor drives the stirring rod to rotate in the receiving chamber, thereby stirring the defoaming agent. During the stirring process, the defoaming agent will form a number of vortex flows in the receiving chamber through the turbulent effect of the turbulent ribs, thereby improving the stirring efficiency of the defoaming agent and achieving a better stirring effect. The stirred defoamer is driven by the filling screw through the filling channel and flows from the filling port to the reaction solution to be filled. During this process, the defoamer is further squeezed and mixed in the filling channel, and its texture is more delicate, and the reaction effect after filling is better. At the same time, in this application, since the filling screw and the stirring rod are both connected to the drive motor, the stirring rod also rotates at the same time during the filling process, which can also largely avoid the situation where the defoamer is added without stirring due to operating errors of the staff. Finally, the filling speed of the defoamer can be controlled by controlling the speed of the drive motor. In this way, the structure of the rapid defoamer filling device of the present application is simple, and the efficiency of filling the defoamer is higher and the effect is better.

[0003] When the above mechanism is in use, the driving motor drives the stirring rod to rotate to stir the defoaming agent in the containing chamber, but lacks the function of quantitatively adding the defoaming agent. The existing defoaming agent filling device has the methods of filling by instrument air gas and manual pump, which cannot achieve the quantitative delivery of the defoaming agent and cannot ensure that all the defoaming agent effectively enters the amine liquid system, resulting in the defoaming agent being unable to fully exert its efficacy.

[0004] Therefore, we proposed that the defoaming agent filling device in the LNG plant can solve the above problems well. Utility Model Content

[0005] The utility model aims to provide a defoamer filling device for an LNG plant to solve the problem that the defoamer cannot be quantitatively added and all the defoamers cannot be effectively introduced into the amine liquid system, which results in the defoamer being unable to fully exert its efficacy.

[0006] To achieve the above object, the utility model provides the following technical solution: a defoaming agent filling device for an LNG plant, comprising a base, a solvent tank is fixed on the left side of the upper surface of the base, a metering pump is bolted to the right side of the upper surface of the base, a motor is bolted to the top of the solvent tank, and a discharge pipe is opened and fixed at the lower part of the left side of the solvent tank;

[0007] A defoamer filling device for an LNG plant, further comprising:

[0008] A connecting pipe is fixed between the solvent tank and the metering pump, and a safety valve and a pressure gauge are installed inside the connecting pipe respectively, and a filter is installed outside the other end of the connecting pipe;

[0009] The internal bearing of the solvent box is connected with a first stirring rod, and the top end of the first stirring rod penetrates the interior of the solvent box, and the top end of the first stirring rod is fixedly connected to the output end of the motor, and a liquid level meter is arranged on the front of the solvent box.

[0010] Preferably, the connecting pipe is communicated with the interior of the solvent box, and quantitative dosage of the defoaming agent can be achieved by utilizing the pressurization of the metering pump.

[0011] Preferably, second stirring rods are connected through the left and right sides of the solvent box, a shell is installed on the outer side of the middle of the first stirring rod, the opposite ends of the two second stirring rods extend into the inner wall of the shell, and the opposite ends of the two second stirring rods are connected to the outer side of the first stirring rod through a bevel gear set, and a movable plate is fixed to the side of the second stirring rod away from one end of the shell.

[0012] Preferably, the two second stirring rods are connected to the solvent box via bearings, and the two second stirring rods are symmetrically distributed inside the solvent box.

[0013] Preferably, brackets are fixed on the left and right sides of the solvent box, a striking block is connected through the inside of the bracket, and a return spring is installed between the outer side of the striking block and the inner wall of the bracket, a first magnet is installed on the side of the movable plate, and a second magnet is installed at one end of the return spring.

[0014] Preferably, the four brackets are evenly spaced and distributed on both sides of the solvent box, the striking block is arranged in a "T" shape, and the striking block and the bracket form an elastic telescopic structure through a reset spring.

[0015] Preferably, the second magnet is located at a position corresponding to that of the first magnet, and the magnetic poles of the second magnet and the opposing surfaces of the first magnet are the same.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the defoamer filling device of the LNG plant adopts a new structural design, and its specific contents are as follows:

[0017] (1) The defoaming agent can be transported to the solvent tank through the metering pump and the connecting pipe, and the quantitative dosage of the defoaming agent can be achieved. At the same time, the motor drives the first stirring rod to rotate to stir and mix the materials in the solvent tank. The pressurization of the metering pump can ensure that the defoaming agent is always in a dissolved state and can ensure that the defoaming agent can be effectively added to the amine liquid system, thereby reducing the foaming frequency and degree of the amine liquid system and ensuring the overall stable operation of the LNG plant;

[0018] Furthermore, the impurities in the defoaming agent can be filtered out by the filter, and the pressure in the pipeline can be monitored in real time by the pressure gauge;

[0019] (2) When the motor drives the first stirring rod to rotate, the bevel gear set is used to drive the two second stirring rods to rotate, thereby stirring the material in the solvent tank longitudinally and transversely, improving the stirring effect, and allowing the defoaming agent to be fully integrated into the amine liquid system;

[0020] (3) The second stirring rod rotates and drives the movable plate to rotate, so that the movable plate drives the first magnet to move to the position of the second magnet, and due to the principle that like-charged magnets repel each other, the striking block moves and strikes the outside of the solvent box, thereby shaking off the residual defoaming agent on the inner wall of the solvent box, thereby avoiding residual defoaming agent in the solvent box and affecting the uniformity of subsequent mixing;

[0021] Furthermore, when the movable plate drives the first magnet away from the second magnet, the striking block is reset under the elastic force of the reset spring, and the above operation is repeated, so that the striking block strikes the outer side of the solvent box back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the main cross-sectional structure of the shell of the utility model;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the movable plate and the bracket of the utility model;

[0026] Figure 5 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the first stirring rod and the second stirring rod of the utility model.

[0028] In the figure: 1. base; 2. solvent tank; 3. metering pump; 4. filter; 5. safety valve; 6. connecting pipe; 7. first stirring rod; 8. housing; 9. bevel gear set; 10. second stirring rod; 11. movable plate; 12. bracket; 13. striking block; 14. first magnet; 15. reset spring; 16. second magnet; 17. liquid level meter; 18. pressure gauge. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 6 , the utility model provides the following technical solutions: a defoamer filling device for an LNG plant;

[0031] Embodiment 1: In order to solve the problem that the method of the prior art achieves quantitative delivery of defoaming agent, but cannot ensure that all defoaming agent effectively enters the amine liquid system, resulting in the defoaming agent not being able to play its role well, the following scheme is disclosed, and specific reference is made to Figure 1 and Figure 2 As shown, it includes a base 1, a solvent box 2 is fixed on the left side of the upper surface of the base 1, and a metering pump 3 is bolted to the right side of the upper surface of the base 1, a motor is bolted to the top of the solvent box 2, and a discharge pipe is opened and fixed at the lower left side of the solvent box 2;

[0032] It also includes: a connecting pipe 6 is fixed between the solvent box 2 and the metering pump 3, the connecting pipe 6 is connected to the inside of the solvent box 2, and the quantitative dosage of the defoaming agent can be achieved by using the pressurization of the metering pump 3, and the inside of the connecting pipe 6 is respectively installed with a safety valve 5 and a pressure gauge 18, and the outside of the other end of the connecting pipe 6 is installed with a filter 4; the internal bearing of the solvent box 2 is connected to the first stirring rod 7, and the top end of the first stirring rod 7 passes through the inside of the solvent box 2, and the top end of the first stirring rod 7 is fixedly connected to the output end of the motor, and the front of the solvent box 2 is provided with a liquid level meter 17;

[0033] The staff installs two connecting pipes 6 at the output ends of the metering pump 3 respectively, and connects the other ends of the two connecting pipes 6 to the solvent tank 2 and the external liquid storage tank respectively, and then starts the metering pump 3. The metering pump 3 transports the defoaming agent inside the external liquid storage tank to the solvent tank 2 through the connecting pipe 6. At the same time, the liquid level meter 17 can be used to facilitate the staff to observe the height of the liquid level in the solvent tank 2, thereby realizing the quantitative delivery of the defoaming agent, and then starts the motor. The motor drives the first stirring rod 7 to rotate and stir and mix the solution in the solvent tank 2, and cooperates with the pressurization of the metering pump 3 to ensure that the defoaming agent is always in a dissolved state, and can ensure that the defoaming agent can be effectively put into the amine liquid system, thereby reducing the foaming frequency and degree of the amine liquid system, and ensuring the overall stable operation of the LNG plant. At the same time, the impurities in the defoaming agent can be filtered through the filter 4, and the pressure gauge 18 can be used to monitor the pressure in the connecting pipe 6 in real time.

[0034] Embodiment 2: Different from Embodiment 1, this embodiment utilizes the bevel gear set 9 to drive the two second stirring rods 10 to rotate, thereby being able to stir the solution in the solvent box 2 longitudinally and transversely. Figure 1-Figure 3 and Figure 6 As shown, the left and right sides of the interior of the solvent box 2 are penetrated and connected with second stirring rods 10, the two second stirring rods 10 are connected to the solvent box 2 by bearings, and the two second stirring rods 10 are symmetrically distributed inside the solvent box 2, and the outer side of the middle of the first stirring rod 7 is sleeved with a shell 8, and the opposite ends of the two second stirring rods 10 are extended into the inner wall of the shell 8, and the opposite ends of the two second stirring rods 10 are connected to the outer side of the first stirring rod 7 through a bevel gear set 9, and a movable plate 11 is fixed to the side of the second stirring rod 10 away from the shell 8.

[0035] When the motor drives the first stirring rod 7 to rotate, the bevel gear set 9 drives the two second stirring rods 10 to rotate, thereby stirring the solution in the solvent tank 2 vertically and horizontally, improving the stirring effect, and allowing the defoaming agent to be fully integrated into the amine solution system.

[0036] Embodiment 3: Different from Embodiment 2, this embodiment uses the striking block 13 to strike the outer side of the solvent box 2 back and forth, so as to shake off the residual defoaming agent on the inner wall of the solvent box 2. For details, refer to Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, brackets 12 are fixed on the left and right sides of the solvent box 2, and a striking block 13 is connected to the inside of the bracket 12, and a return spring 15 is installed between the outer side of the striking block 13 and the inner wall of the bracket 12. Four brackets 12 are evenly spaced and distributed on both sides of the solvent box 2. The striking block 13 is arranged in a "T" shape, and the striking block 13 and the bracket 12 form an elastic telescopic structure through the return spring 15. A first magnet 14 is installed on the side of the movable plate 11, and a second magnet 16 is installed at one end of the return spring 15. The second magnet 16 corresponds to the position of the first magnet 14, and the second magnet 16 has the same magnetic pole as the opposite surface of the first magnet 14;

[0037] When the second stirring rod 10 rotates, it can drive the movable plate 11 to rotate, so that the movable plate 11 drives the first magnet 14 to move to the position of the second magnet 16, and due to the principle that like magnets repel each other, the striking block 13 moves and strikes the outside of the solvent box 2. When the movable plate 11 drives the first magnet 14 away from the second magnet 16, the striking block 13 is reset under the elastic force of the reset spring 15, and the above operation is repeated, so that the striking block 13 reciprocates and strikes the outside of the solvent box 2, thereby shaking off the defoaming agent remaining on the inner wall of the solvent box 2, avoiding residual defoaming agent inside the solvent box 2 and affecting the uniformity of subsequent mixing.

[0038] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A defoamer filling device for an LNG plant, comprising a base (1), a solvent tank (2) being fixed on the left side of the upper surface of the base (1), a metering pump (3) being bolted to the right side of the upper surface of the base (1), a motor being bolted to the top of the solvent tank (2), and a discharge pipe being fixedly provided at the lower part of the left side of the solvent tank (2); It is characterized in that Also includes: A connecting pipe (6) is fixed between the solvent box (2) and the metering pump (3), and a safety valve (5) and a pressure gauge (18) are respectively installed inside the connecting pipe (6), and a filter (4) is installed on the outside of the other end of the connecting pipe (6); The internal bearing of the solvent box (2) is connected to a first stirring rod (7), and the top end of the first stirring rod (7) penetrates the interior of the solvent box (2), and the top end of the first stirring rod (7) is fixedly connected to the output end of the motor, and a liquid level meter (17) is arranged on the front of the solvent box (2).

2. The defoamer filling device for an LNG plant according to claim 1, characterized in that: The connecting pipe (6) is connected to the interior of the solvent box (2), and quantitative dosage of the defoaming agent can be achieved by utilizing the pressurization of the metering pump (3).

3. The defoamer filling device for an LNG plant according to claim 1, characterized in that: The left and right sides of the solvent box (2) are penetrated by second stirring rods (10), the outer side of the middle of the first stirring rod (7) is sleeved with a shell (8), the opposite ends of the two second stirring rods (10) extend into the inner wall of the shell (8), and the opposite ends of the two second stirring rods (10) are connected to the outer side of the first stirring rod (7) through a bevel gear set (9), and a movable plate (11) is fixed to the side of the second stirring rod (10) away from the shell (8).

4. The defoamer filling device for an LNG plant according to claim 3, characterized in that: The two second stirring rods (10) are connected to the solvent box (2) via a bearing, and the two second stirring rods (10) are symmetrically distributed inside the solvent box (2).

5. The defoamer filling device for an LNG plant according to claim 3, characterized in that: The solvent box (2) is fixed with a bracket (12) on the left and right sides, the bracket (12) is connected with a striking block (13) running through the inside, and a return spring (15) is installed between the outer side of the striking block (13) and the inner wall of the bracket (12), the side of the movable plate (11) is installed with a first magnet (14), and one end of the return spring (15) is installed with a second magnet (16).

6. The defoamer filling device for an LNG plant according to claim 5, characterized in that: The four brackets (12) are distributed at equal intervals on both sides of the solvent box (2); the striking block (13) is arranged in a "T" shape, and the striking block (13) forms an elastic telescopic structure with the bracket (12) via a return spring (15).

7. The defoamer filling device for an LNG plant according to claim 5, characterized in that: The second magnet (16) corresponds to the position of the first magnet (14), and the magnetic poles of the opposing surfaces of the second magnet (16) and the first magnet (14) are the same.

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