Two-phase interface automatic balance control device
By changing the feed position in the phase separator and adding a buffer tank and a uniform circuit, the U-shaped liquid seal section is designed, which solves the problems of unclear separation and operation fluctuations of the phase separator, and realizes automatic balance control of the two-phase interface, improving the separation effect and production stability.
Patent Information
- Application Number
- CN202422277526.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-18
AI Technical Summary
In the chemical production of existing phase separators, there are problems such as unclear separation, complex control, and large operation fluctuations, resulting in the two-phase interface being out of control and affecting product quality.
By changing the feed position, adding buffer tanks and equalization circuits, designing a U-shaped liquid seal section of the discharge pipe, combining the interface instrument and control valve to achieve automatic balance control of the two-phase interface.
The two-phase interface of the phase splitter is realized, reducing manual intervention, optimizing separation effect, and stabilizing product quality.
Smart Images
Figure CN223184127U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mixed liquid separation equipment, in particular to a two-phase interface automatic balance control device. Background Art
[0002] In chemical production, it is often necessary to separate a mixture of two immiscible liquids of different densities, which requires the use of a phase separator that can perform liquid-liquid two-phase separation.
[0003] In the existing production process, the mixed liquid is directly pumped into the phase separator from the top, the light component overflows from the overflow port on the upper part of the phase separator, and the heavy component is discharged from the bottom of the phase separator through a U-shaped pipe.
[0004] Existing phase separators have problems such as unclear separation, complex control, and large operational fluctuations: the mixed liquid enters the top of the phase separator, and because the overflow port for the light component is at the top, the mixed liquid separation time is insufficient, and some heavy components flow directly out of the overflow port along with the light components, resulting in unclear separation;
[0005] The heavy components are discharged from the bottom of the phase separator through a U-shaped tube. To control the appropriate two-phase interface, it is necessary to adjust it through the control valve at the bottom of the phase separator. The control is complex and requires manual intervention.
[0006] In production, the upstream process of the mixed liquid has operating conditions such as low operating pressure, large flow fluctuations, and intermittent operation, which makes the operation of the phase separator fluctuate greatly during operation, often leading to loss of control of the two-phase interface, thereby affecting product quality. Utility Model Content
[0007] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a two-phase interface automatic balancing control device with a reasonable structure, which can achieve automatic balancing of the two-phase interface of the phase splitter.
[0008] The technical solutions adopted in this utility model are as follows:
[0009] A two-phase interface automatic balancing control device includes a phase separator and a buffer tank connected to the phase separator.
[0010] A feed pipe is introduced into the phase separator, an overflow pipe and a pressure equalizing circuit are provided on the phase separator, the pressure equalizing circuit connects the end to the end of the phase separator, and the buffer tank is connected to the connecting pipe.
[0011] A discharge pipe is led out of the buffer tank, and a middle section of the discharge pipe is bent to form a U-shaped liquid sealing section.
[0012] As a further improvement of the above technical solution:
[0013] The discharge end of the feed pipe is located at the middle of the vertical height in the phase separator. This position is the phase separation surface, and an interface instrument is set near the phase separation surface.
[0014] The discharge end of the feed pipe is located at the midpoint between the overflow pipe and the discharge pipe.
[0015] The pressure equalizing circuit comprises:
[0016] The connecting pipe is connected from the bottom of the phase separator to the bottom of the buffer tank, and the control valve is connected to the connecting pipe.
[0017] Equalizing pipe, connected from the top of the buffer tank to the top of the phase separator.
[0018] The internal air pressure of the buffer tank is constant to the internal air pressure of the phase separator.
[0019] One end of the discharge pipe extending into the buffer tank is provided with a collecting tank, the collecting tank is located in the middle of the buffer tank, and the top height of the collecting tank is adapted to the phase separation surface in the phase separator.
[0020] The top of the collecting tank is open, and a gas phase space is reserved at the top of the collecting tank.
[0021] The discharge pipe includes a first discharge section, a U-shaped liquid seal section, and a second discharge section which are sequentially led out from the buffer tank.
[0022] A vertical height difference is reserved between the collecting notch portion and the second discharging section.
[0023] A gas phase pipe is also led out from the top of the phase separator.
[0024] The pressure at the outlet of the second discharging section is equal to the pressure at the outlet of the gas phase pipe.
[0025] The beneficial effects of the utility model are as follows:
[0026] The utility model has a compact and reasonable structure and is easy to operate, can realize automatic phase separation at the two-phase interface, reduces the manual intervention required for phase separation, and optimizes the phase separation effect.
[0027] The utility model adopts technical means such as changing the feeding position and adding a buffer tank to address the shortcomings of the existing phase separator. By changing the feeding position and adding a buffer tank, the utility model can effectively solve the problems existing in the existing production and enable the phase separator to automatically achieve stable control of the two-phase interface.
[0028] The feed pipe of the utility model is inserted into the liquid of the phase separator so that the mixed liquid comes out in the middle of the phase separator, ensuring that the light and heavy phase components have enough time to separate and the separation effect is guaranteed;
[0029] The buffer tank added by the utility model, together with the balance pipe, control valve, connecting pipe and liquid seal section, constitutes a discharge system for the heavy component. The two-phase interface of the phase separator is automatically balanced according to the pre-calculated height. The control valve is always open during production, and there is no need to adjust the interface of the phase separator through the control valve, thus reducing manual operation.
[0030] The utility model arranges a collecting tank in the buffer tank and reserves sufficient gas phase space above the buffer tank, thereby increasing the buffer time and avoiding the influence of various operation fluctuations in production on the phase separator interface. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0032] Figure 2 Schematic diagram of the discharge pipe structure of the present invention, in which H1 is the height difference between the discharge pipe and the collecting tank in the buffer tank, and H2 is the height of the liquid seal section.
[0033] Among them: 1. Feed pipe; 2. Balance pipe; 3. Gas phase pipe; 4. Phase separator; 5. Overflow pipe; 6. Control valve; 7. Connecting pipe; 8. Buffer tank; 9. Collection tank; 10. Discharge pipe; 101. First discharge section; 102. Liquid seal section; 103. Second discharge section. DETAILED DESCRIPTION
[0034] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.
[0035] like Figure 1 As shown, the two-phase interface automatic balancing control device of this embodiment includes a phase separator 4 and a buffer tank 8 connected to the phase separator 4.
[0036] The feed pipe 1 is introduced into the phase separator 4, and an overflow pipe 5 and a pressure equalizing circuit are set on the phase separator 4. The pressure equalizing circuit connects the end of the phase separator 4, and the buffer tank 8 is connected to the connecting pipe 7.
[0037] A discharge pipe 10 is led out of the buffer tank 8 , and a middle section of the discharge pipe 10 is bent to form a U-shaped liquid sealing section 102 .
[0038] The discharge end of the feed pipe 1 is located at the middle of the vertical height in the phase separator 4. This position is the phase separation surface, and an interface instrument 11 is arranged near the phase separation surface.
[0039] The discharge end of the feed pipe 1 is located at the midpoint between the overflow pipe 5 and the discharge pipe 10 .
[0040] The pressure equalization circuit includes:
[0041] The connecting pipe 7 is connected from the bottom of the phase separator 4 to the bottom of the buffer tank 8, and the connecting pipe 7 is connected to the control valve 6.
[0042] The balance pipe 2 is connected from the top of the buffer tank 8 to the top of the phase separator 4.
[0043] The internal pressure of the buffer tank 8 is constant to the internal pressure of the phase separator 4 .
[0044] One end of the discharge pipe 10 extending into the buffer tank 8 is provided with a collecting tank 9 . The collecting tank 9 is located in the middle of the buffer tank 8 , and the top height of the collecting tank 9 is adapted to the phase separation surface in the phase separator 4 .
[0045] The top of the collecting tank 9 is open, and a gas phase space is reserved in the upper part of the collecting tank 9 .
[0046] The discharge pipe 10 includes a first discharge section 101, a U-shaped liquid sealing section 102, and a second discharge section 103 which are sequentially led out from the buffer tank 8.
[0047] A vertical height difference is reserved between the mouth of the collecting trough 9 and the second discharging section 103 .
[0048] A gas phase pipe 3 is also led out from the top of the phase separator 4 .
[0049] The pressure at the outlet of the second discharging section 103 is equal to the pressure at the outlet of the gas phase pipe 3 .
[0050] The specific structure and working principle of the utility model are as follows:
[0051] Aiming at the shortcomings of the existing phase separator, this device effectively solves the problems existing in the existing production by changing the feed position and adding a buffer tank, so that the phase separator can automatically achieve stable control of the two-phase interface.
[0052] The mixed liquid from the upstream process enters the upper part of the phase separator 4 through the feed pipe 1. The feed pipe is inserted into the liquid in the phase separator. The mixed liquid comes out from the middle of the phase separator 4 and undergoes two-phase separation. The light component moves from bottom to top, while the heavy component moves from top to bottom. Since the actual feed port is at a certain distance from the upper overflow port and the bottom discharge port, the mixed liquid can have sufficient time to separate the two phases, ensuring the separation effect of the light and heavy components.
[0053] The light components float to the upper layer of the liquid and flow out of the phase separator 4 through the overflow pipe 5, which also controls the liquid level of the phase separator 4.
[0054] The heavy component sinks to the bottom of the phase separator 4, passes through the control valve 6 and the connecting pipe 7, and enters the bottom of the buffer tank 8. In order to adapt to the operation fluctuations of normal production, the control valve 6 and the connecting pipe 7 should be set large enough to reduce the pipeline resistance;
[0055] A balance pipe 2 is provided on the top of the buffer tank 8, which is connected to the phase separator 4, so that the pressure of the phase separator 4 and the buffer tank 8 can be balanced, ensuring smooth flow of the heavy component from the phase separator 4 to the buffer tank 8;
[0056] A collecting tank 9 is provided inside the buffer tank 8. The collecting tank 9 is located in the middle of the buffer tank 8. The top of the collecting tank 9 is open, and the bottom of the collecting tank 9 is connected to a U-shaped pipe via a pipeline. The height of the top of the collecting tank 9 should be set to adapt to the interface of the phase separator 4 to be controlled by the density difference and pressure difference between the light and heavy components, thereby controlling the height of the two-phase interface of the phase separator 4.
[0057] Sufficient gas phase space is reserved above the collecting tank 9 to ensure that when the operation fluctuates, the heavy components have sufficient buffering time in the buffer tank 8 to avoid the operation fluctuations affecting the two-phase interface of the phase separator;
[0058] The heavy components from the bottom of the collecting tank 9 pass through the U-shaped pipe, i.e., the liquid seal section 102, and are discharged from the second discharge section 103. The height H2 of the liquid seal section 102 should form a sufficient liquid seal to meet the needs of normal production and prevent the gas phase from escaping from the U-shaped pipe due to pressure fluctuations during production. There should be a sufficient potential difference between the second discharge pipe 103 and the height H1 of the collecting tank in the buffer tank 8 to ensure smooth discharge of the heavy components.
[0059] The pressure at the outlet of the second discharge pipe 103 should be relatively balanced with the pressure at the outlet of the gas phase pipe 3 of the phase separator 4 to ensure the normal operation of the entire phase separator system;
[0060] The phase separator 4 is provided with an interface meter 12 to monitor the stability of the two-phase interface of the phase separator 4 and to avoid interface loss of control due to excessive operation fluctuations or excessive density difference between light and heavy components.
[0061] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.
Claims
1. A two-phase interface automatic balancing control device, characterized by: It includes a phase separator (4) and a buffer tank (8) connected to the phase separator (4). The feed pipe (1) is introduced into the phase separator (4), and an overflow pipe (5) and a pressure equalizing circuit are provided on the phase separator (4). The pressure equalizing circuit connects the end to the end of the phase separator (4), and the buffer tank (8) is connected to the connecting pipe (7). A discharge pipe (10) is led out from the buffer tank (8), and a middle section of the discharge pipe (10) is bent to form a U-shaped liquid sealing section (102).
2. The two-phase interface automatic balancing control device according to claim 1, characterized in that: The discharge end of the feed pipe (1) is located at the middle position of the vertical height in the phase separator (4), and this position is the phase separation surface. The interface instrument (11) is arranged near the phase separation surface.
3. The two-phase interface automatic balancing control device according to claim 2, characterized in that: The discharge end of the feed pipe (1) is located at the midpoint between the overflow pipe (5) and the discharge pipe (10).
4. The two-phase interface automatic balancing control device according to claim 1, characterized in that: The pressure equalizing circuit comprises: The connecting pipe (7) is connected from the bottom of the phase separator (4) to the bottom of the buffer tank (8), and the connecting pipe (7) is connected to the control valve (6). The balance pipe (2) is connected from the top of the buffer tank (8) to the top of the phase separator (4).
5. The two-phase interface automatic balancing control device according to claim 4, characterized in that: The internal air pressure of the buffer tank (8) is constantly the same as the internal air pressure of the phase separator (4).
6. The two-phase interface automatic balancing control device according to claim 1, characterized in that: One end of the discharge pipe (10) extending into the buffer tank (8) is provided with a collecting tank (9), the collecting tank (9) is located in the middle of the buffer tank (8), and the top height of the collecting tank (9) is adapted to the phase separation surface in the phase separator (4).
7. The two-phase interface automatic balancing control device according to claim 6, characterized in that: The top of the collecting tank (9) is open, and a gas phase space is reserved in the upper part of the collecting tank (9).
8. The two-phase interface automatic balancing control device according to claim 1, characterized in that: The discharge pipe (10) comprises a first discharge section (101), a U-shaped liquid sealing section (102), and a second discharge section (103) which are sequentially led out from the buffer tank (8). A vertical height difference is reserved between the mouth of the collecting trough (9) and the second discharging section (103).
9. The two-phase interface automatic balancing control device according to claim 8, characterized in that: A gas phase pipe (3) is also led out from the top of the phase separator (4).
10. The two-phase interface automatic balancing control device according to claim 9, characterized in that: The pressure at the outlet of the second discharging section (103) is equal to the pressure at the outlet of the gas phase pipe (3).