Automatic heating device for raw gas buffer tank

Abstract

The utility model relates to the technical field of chemical equipment, and disclose a raw material gas buffer tank automatic heating device, include: raw material gas buffer tank, it is used for buffering and temporary storage raw material gas, jacket, it sets up in the outside of raw material gas buffer tank, is used for accommodating heating medium and carries out heating to raw material gas buffer tank, steam pipeline, it is connected with the jacket, is used for to the steam pipeline in the inside of the jacket and passes in steam as heating medium, regulating valve, it sets up on steam pipeline, is used for controlling the on-off of steam. The utility model through the double monitoring of liquid level meter and pressure difference meter, and with the regulating valve of steam pipeline interlock, realized the automatic judgement and processing to the raw material gas buffer tank in the accumulation of liquid condition, need not manual intervention, automatic start -stop heating process, has improved the automation level of production significantly, has guaranteed the long -term stable operation of device.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to an automatic heating device for a raw material gas buffer tank. Background Technology

[0002] In the synthesis process of vinylidene fluoride (VDF), the R142b feedstock needs to be vaporized and buffered before entering the cracking furnace. However, existing feedstock vaporizers are unable to completely vaporize the liquid phase R142b, resulting in a small amount of liquid droplets being entrained in the gaseous R142b and entering the feedstock gas buffer tank. These droplets continuously accumulate at the bottom of the buffer tank, forming a precipitate.

[0003] As the equipment operates for extended periods, the liquid level in the buffer tank gradually rises, eventually clogging its inlet pipe, increasing system resistance, and even forcing a shutdown for cleaning. Currently, this problem mainly relies on regular manual inspections and interventions, lacking an effective means to automatically and promptly eliminate accumulated liquid, which seriously affects the continuity and stability of production operations. Utility Model Content

[0004] The purpose of this invention is to provide an automatic heating device for a raw material gas buffer tank to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic heating device for a raw material gas buffer tank, comprising: Raw material gas buffer tank, which is used to buffer and temporarily store raw material gas; A jacket, which is disposed outside the raw material gas buffer tank, is used to contain the heating medium and heat the raw material gas buffer tank; A steam pipe, which is connected to the jacket, is used to introduce steam into the jacket as a heating medium. A regulating valve, which is installed on the steam pipeline, is used to control the on / off state of steam; A level gauge is installed on the raw gas buffer tank to monitor the level of liquid phase Rb inside the tank; A differential pressure gauge is connected between the inlet and outlet pipes of the raw material gas buffer tank to monitor the pressure difference between the inlet and outlet of the raw material gas buffer tank. Both the level gauge and the differential pressure gauge are connected to the control valve via signal connection, and are configured as follows: When the liquid level detected by the level gauge rises to the first preset high liquid level, or the differential pressure detected by the differential pressure gauge rises to the first preset high differential pressure, the regulating valve is controlled to open to allow steam to be introduced for heating. When the liquid level detected by the level gauge drops to the first preset low liquid level, and the differential pressure detected by the differential pressure gauge drops to the first preset low differential pressure, the regulating valve is controlled to close to stop heating; The installation mechanism is located on the outside of the raw material gas buffer tank.

[0006] Preferably, the jacket is welded or otherwise fixed to the outer wall of the raw material gas buffer tank.

[0007] Preferably, the first preset high liquid level is the full range of the level gauge of the raw gas buffer tank.

[0008] Preferably, the first preset low liquid level is the full range of the level gauge of the raw gas buffer tank.

[0009] Preferably, the first preset high pressure difference is kPa.

[0010] Preferably, the first preset low pressure difference is kPa.

[0011] Preferably, the regulating valve is a pneumatic regulating valve or an electric regulating valve.

[0012] Preferably, the level gauge and differential pressure gauge are interlocked with the regulating valve through an independent control system, or communicate directly with the controller of the regulating valve to achieve automatic control.

[0013] Preferably, the installation mechanism includes a socket, which is fixedly connected to the outer wall of the raw material gas buffer tank. A support frame is fixedly connected to the side of the socket away from the raw material gas buffer tank. A threaded rod is threadedly connected to the side of the support frame away from the socket. A rectangular plate is rotatably connected to one end of the threaded rod. An insert block is fixedly connected to the side of the rectangular plate away from the threaded rod. The top of the jacket is also equipped with a mounting block.

[0014] Preferably, a torsion block is fixedly connected to the end of the threaded rod away from the rectangular plate, the rectangular plate is slidably connected to the inner wall of the support frame, a through opening is opened on one side of the socket, the insertion block passes through the through opening, the mounting block is movably connected to the inner wall of the socket, a latch is opened on one side of the mounting block, and the insertion block is movably connected to the inner wall of the latch.

[0015] Compared with the prior art, the present invention provides an automatic heating device for a raw material gas buffer tank, which has the following beneficial effects: 1. This utility model achieves automatic judgment and handling of liquid accumulation in the raw material gas buffer tank through dual monitoring by a level gauge and a differential pressure gauge, and interlocking with the regulating valve of the steam pipeline. It automatically starts and stops the heating process without manual intervention, significantly improving the level of automation in production and ensuring long-term stable operation of the equipment. 2. This utility model employs two independent detection parameters—liquid level and inlet / outlet pressure difference—for joint control, which complement each other. This dual-insurance mechanism greatly improves the reliability and accuracy of control, avoids system malfunctions or failures caused by a single instrument failure, and ensures timely and effective control. 3. This utility model automatically and promptly vaporizes the liquid accumulated in the tank, fundamentally preventing the problem of blockage in the buffer tank inlet pipe caused by the accumulation of liquid phase R142b, effectively reducing system resistance, avoiding unplanned shutdowns, and improving overall production efficiency. 4. This utility model has a simple overall structure, requiring only the addition of a jacket, instruments, and control system to an existing buffer tank, resulting in low manufacturing costs. Furthermore, the level gauges, differential pressure gauges, and regulating valves used are all general-purpose industrial components, making installation convenient and maintenance easy, thus possessing high practicality and economy. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of this utility model; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Inlet pipe; 2. Differential pressure gauge; 3. Outlet pipe; 4. Raw material gas buffer tank; 5. Liquid level gauge; 6. Steam pipe; 7. Regulating valve; 8. Jacket; 9. Installation mechanism; 91. Socket; 92. Support frame; 93. Threaded rod; 94. Rectangular plate; 95. Insert block; 96. Mounting block. Detailed Implementation

[0018] 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.

[0019] This utility model provides the following technical solution: Combination Figures 1 to 2 An automatic heating device for a raw material gas buffer tank, comprising: Raw material gas buffer tank 4 is used to buffer and temporarily store R142b raw material gas; Jacket 8, which is located outside the raw material gas buffer tank 4, is used to contain the heating medium and heat the raw material gas buffer tank 4; Steam pipe 6, which is connected to jacket 8, is used to introduce steam into jacket 8 as a heating medium; The regulating valve 7 is installed on the steam pipe 6 and is used to control the on / off of steam. Level gauge 5 is installed on raw gas buffer tank 4 to monitor the level of liquid phase R142b in the tank; Differential pressure gauge 2 is connected between the inlet pipe 1 and the outlet pipe 3 of the raw material gas buffer tank 4 to monitor the pressure difference between the inlet and outlet of the raw material gas buffer tank 4. Among them, level gauge 5 and differential pressure gauge 2 are both connected to control valve 7 via signal connection, and are configured as follows: When the liquid level detected by the level gauge 5 rises to the first preset high liquid level, or the differential pressure detected by the differential pressure gauge 2 rises to the first preset high differential pressure, the control regulating valve 7 is opened to allow steam to be introduced for heating. When the liquid level detected by the level gauge 5 drops to the first preset low liquid level, and the differential pressure detected by the differential pressure gauge 2 drops to the first preset low differential pressure, the control regulating valve 7 is closed to stop heating. Installation mechanism 9 is located on the outside of raw material gas buffer tank 4.

[0020] The jacket 8 is welded or otherwise fixed to the outer wall of the raw material gas buffer tank 4.

[0021] The first preset high liquid level is 30% of the full scale of the level gauge in the raw material gas buffer tank 4.

[0022] The first preset low liquid level is 5% of the full scale of the level gauge in the raw material gas buffer tank 4.

[0023] The first preset high pressure difference is 20 kPa; the first preset low pressure difference is 5 kPa.

[0024] The regulating valve 7 is a pneumatic regulating valve or an electric regulating valve.

[0025] The level gauge 5 and the differential pressure gauge 2 are interlocked with the regulating valve 7 through an independent control system, or communicate directly with the controller of the regulating valve 7 to achieve automatic control.

[0026] The mounting mechanism 9 includes a socket 91, which is fixedly connected to the outer wall of the raw material gas buffer tank 4. A support frame 92 is fixedly connected to the side of the socket 91 away from the raw material gas buffer tank 4. A threaded rod 93 is threadedly connected to the side of the support frame 92 away from the socket 91. A rectangular plate 94 is rotatably connected to one end of the threaded rod 93. An insert block 95 is fixedly connected to the side of the rectangular plate 94 away from the threaded rod 93. A top mounting block 96 is also attached to the jacket 8.

[0027] A torsion block is fixedly connected to the end of the threaded rod 93 away from the rectangular plate 94. The rectangular plate 94 is slidably connected to the inner wall of the support frame 92. A through-hole is opened on one side of the socket 91. The plug block 95 passes through the through-hole. The mounting block 96 is movably connected to the inner wall of the socket 91. A bayonet is opened on one side of the mounting block 96. The plug block 95 is movably connected to the inner wall of the bayonet.

[0028] In actual operation, when this device is used, the rotating torsion block drives the threaded rod 93 to rotate, so that the threaded rod 93 can drive the rectangular plate 94 to move. The rectangular plate 94 can drive the insert block 95 to be pulled out from the inside of the mounting block 96, which facilitates the removal of the limit on the mounting block 96, realizes the disconnection between the jacket 8 and the raw material gas buffer tank 4, facilitates the inspection and maintenance of the jacket 8, and facilitates the installation and operation.

[0029] 1. Monitoring Phase: The system monitors the status of the feed gas buffer tank 4 in real time using two independent sensors. Level gauge 5 directly monitors the level of the accumulated liquid phase R142b within the tank; simultaneously, differential pressure gauge 2 monitors the pressure difference between the feed gas buffer tank inlet pipe 1 and the feed gas buffer tank outlet pipe 3. This pressure difference is a key indirect indicator for determining whether a blockage is imminent in the pipeline.

[0030] 2. Triggering the heating phase: The two monitoring signals mentioned above form an interlocking logic with the regulating valve 7 installed on the steam pipe 6. This is an "OR" logic, meaning that the system will trigger a heating action as long as either condition is met. Condition 1: Liquid level trigger: When the reading of liquid level gauge 5 reaches the high set value, such as 30%.

[0031] Condition 2 Differential Pressure Trigger: When the reading of differential pressure gauge 2 reaches a high set value, such as 20 kPa.

[0032] Once any condition is met, the control system will immediately issue a command to automatically open the regulating valve 7.

[0033] 3. Perform the heating phase: When the regulating valve 7 is opened, steam enters the raw gas buffer tank jacket 8, which surrounds the raw gas buffer tank 4, through the steam pipe 6. The jacket acts as a heat exchanger, transferring the heat of the steam to the tank wall, thereby indirectly heating the liquid phase R142b accumulated at the bottom of the raw gas buffer tank 4, causing it to vaporize rapidly.

[0034] 4. Heating cessation stage: After heating has been in place for a period of time, the liquid level in the tank drops, and flow is restored. At this point, the conditions for stopping heating become more stringent, employing an "AND" logic, meaning that two conditions must be met simultaneously: Condition 1: Liquid level condition: The reading of liquid level gauge 5 drops to the low set value, such as 5%.

[0035] Condition 2: Differential pressure condition: The reading of differential pressure gauge 2 also returns to the low set value, such as 5 kPa.

[0036] When both conditions are met simultaneously, the control system will issue a command to automatically close regulating valve 7, cutting off the steam supply and ending the heating process. The system will then return to the monitoring phase, and this cycle will continue, achieving fully automatic and intelligent anti-clogging control.

Claims

1. An automatic heating device for a raw material gas buffer tank, characterized in that, include: Raw material gas buffer tank (4), which is used to buffer and temporarily store R142b raw material gas; A jacket (8) is provided outside the raw material gas buffer tank (4) for containing the heating medium and heating the raw material gas buffer tank (4); A steam pipe (6) is connected to the jacket (8) for introducing steam into the jacket (8) as a heating medium; A regulating valve (7) is installed on the steam pipe (6) to control the on / off state of steam; A level gauge (5) is installed on the raw material gas buffer tank (4) to monitor the level of liquid phase R142b in the tank; Differential pressure gauge (2), which is connected between the inlet pipe (1) and the outlet pipe (3) of the raw material gas buffer tank (4), is used to monitor the inlet and outlet pressure difference of the raw material gas buffer tank (4); The level gauge (5) and the differential pressure gauge (2) are both connected to the regulating valve (7) via signal connection, and are configured as follows: When the liquid level detected by the level gauge (5) rises to the first preset high liquid level, or the differential pressure detected by the differential pressure gauge (2) rises to the first preset high differential pressure, the regulating valve (7) is controlled to open to allow steam to be introduced for heating. When the liquid level detected by the level gauge (5) drops to the first preset low liquid level, and the differential pressure detected by the differential pressure gauge (2) drops to the first preset low differential pressure, the regulating valve (7) is controlled to close to stop heating; The installation mechanism (9) is located outside the raw material gas buffer tank (4).

2. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The jacket (8) is located outside the raw material gas buffer tank (4).

3. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The first preset high liquid level is 30% of the full range of the liquid level gauge of the raw material gas buffer tank (4).

4. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The first preset low liquid level is 5% of the full range of the level gauge of the raw material gas buffer tank (4).

5. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The first preset high pressure difference is 20 kPa.

6. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The first preset low pressure difference is 5 kPa.

7. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The regulating valve (7) is a pneumatic regulating valve or an electric regulating valve.

8. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The level gauge (5) and differential pressure gauge (2) are interlocked with the regulating valve (7) through an independent control system, or communicate directly with the controller of the regulating valve (7) to achieve automatic control.

9. The automatic heating device for a raw material gas buffer tank according to claim 1, characterized in that: The installation mechanism (9) includes a socket (91), which is fixedly connected to the outer wall of the raw material gas buffer tank (4). A support frame (92) is fixedly connected to the side of the socket (91) away from the raw material gas buffer tank (4). A threaded rod (93) is threadedly connected to the side of the support frame (92) away from the socket (91). A rectangular plate (94) is rotatably connected to one end of the threaded rod (93). A plug block (95) is fixedly connected to the side of the rectangular plate (94) away from the threaded rod (93). A top mounting block (96) is installed on the jacket (8).

10. An automatic heating device for a raw material gas buffer tank according to claim 9, characterized in that: The threaded rod (93) is fixedly connected to a torsion block at one end away from the rectangular plate (94). The rectangular plate (94) is slidably connected to the inner wall of the support frame (92). A through-hole is opened on one side of the socket (91). The plug (95) passes through the through-hole. The mounting block (96) is movably connected to the inner wall of the socket (91). A bayonet is opened on one side of the mounting block (96). The plug (95) is movably connected to the inner wall of the bayonet.

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