Gas-liquid separation defoaming device

Abstract

The utility model discloses a kind of gas-liquid separation defoaming devices, it is related to phosphoric acid production technical field, including separation equipment and negative pressure equipment;Separation equipment has the feed inlet of intercommunication inner separation cavity, gas outlet and liquid outlet, feed inlet is communicated in feed pipe one end, the other end of feed pipe is used to extend into the bubble layer of flue gas passage, negative pressure equipment is communicated with gas outlet;Negative pressure equipment is used to provide negative pressure, to make separation cavity by feed inlet and feed pipe inhale bubble, bubble can be gas-liquid separation in separation cavity, and separated liquid can flow back into flue gas passage by liquid outlet.The gas-liquid separation defoaming device provided by the utility model reduces production cost, improves product quality.

Description

Technical Field

[0001] This utility model relates to the field of phosphoric acid production technology, and in particular to a gas-liquid separation and defoaming device. Background Technology

[0002] In the phosphoric acid production process, sulfuric acid reacts with phosphate rock slurry in a reaction tank, releasing a large amount of heat and flue gas. To reduce environmental pollution, a gap of about 1.5 meters is reserved above the reaction tank as a flue gas channel. The flue gas is drawn to the scrubbing system by the tail gas fan. Due to the decrease in high-grade ore sources, low-grade ore sources have recently been subjected to flotation to meet production requirements. During this process, flotation reagents are added, and a large number of bubbles are generated on the liquid surface. These bubbles continuously fill the flue gas channel, making it impossible for the tail gas fan to effectively remove the flue gas. To reduce bubble generation, defoaming agents are added to reduce bubbles and maintain production, but this increases production costs and also increases the consumption of sulfuric acid, the raw material for the product, which has a certain impact on the quality of the phosphoric acid product. Utility Model Content

[0003] The purpose of this invention is to provide a gas-liquid separation and defoaming device to solve the problems existing in the prior art, reduce production costs, and improve product quality.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a gas-liquid separation and defoaming device, including a separation device and a negative pressure device; the separation device has an inlet, an outlet, and a liquid outlet communicating with an internal separation chamber; the inlet is connected to one end of a feed pipe, and the other end of the feed pipe is used to extend into the bubble layer of the flue gas channel; the negative pressure device is connected to the outlet; the negative pressure device is used to provide negative pressure so that bubbles are drawn into the separation chamber through the inlet and the feed pipe, the bubbles can be separated into gas and liquid in the separation chamber, and the separated liquid can flow back into the flue gas channel through the liquid outlet.

[0006] Preferably, the separation device is configured as a separation tank, which is vertically arranged, and the top and bottom of the separation tank are respectively provided with the air outlet and the liquid outlet, and the feed inlet is located at the top of the side wall of the separation tank.

[0007] Preferably, the feed inlet is capable of feeding tangentially into the separator.

[0008] Preferably, the separation tank includes a spiral guide plate disposed on the inner wall of the separation chamber, and the upper end of the spiral guide plate is connected to the feed inlet.

[0009] Preferably, the liquid outlet is provided with a control valve, which can control the opening and closing of the liquid outlet.

[0010] Preferably, the control valve is configured as a movable plate, the upper end of which is rotatably connected to the liquid outlet. Both the end faces of the movable plate and the liquid outlet are vertically inclined. The movable plate can seal the liquid outlet under the action of gravity, and the movable plate can rotate relative to the liquid outlet under the action of the liquid pressure in the separation chamber to open the liquid outlet.

[0011] Preferably, a sealing layer is provided on the side of the movable plate facing the liquid outlet.

[0012] Preferably, the air inlet of the negative pressure device is connected to the air outlet through an air inlet pipe, the exhaust port of the negative pressure device is connected to one end of an exhaust pipe, and the other end of the exhaust pipe is used to extend into the flue gas passage.

[0013] Preferably, it further includes a support base, which is used to be disposed on the top of the reaction tank, and the separation device and the negative pressure device are both disposed on the support base.

[0014] Preferably, the liquid outlet is positioned above the opening in the flue gas channel.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The gas-liquid separation defoaming device provided by this utility model can draw bubbles generated in the flue gas channel of the reaction tank into the separation chamber of the separation device through the feed pipe and feed port under the negative pressure suction of the negative pressure equipment. The bubbles carrying liquid undergo gas-liquid separation in the separation chamber, and the liquid flows back to the flue gas channel through the liquid outlet to mix with the liquid in the reaction tank. The drug cost in the liquid can be reused, reducing waste. Moreover, defoaming by directly extracting the bubbles reduces the number of bubbles compared to adding defoaming agents, lowers costs, and improves product quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the gas-liquid separation and defoaming device provided in Embodiment 1 of this utility model;

[0019] Figure 2 This is an internal schematic diagram of the separation device provided in Embodiment 1 of this utility model;

[0020] Figure 3This is a schematic diagram of the control valve provided in Embodiment 1 of this utility model.

[0021] In the diagram: 1-Separation equipment; 11-Separation chamber; 12-Inlet; 13-Outlet; 14-Liquid outlet; 15-Spiral guide plate; 2-Negative pressure equipment; 3-Inlet pipe; 4-Flue gas passage; 5-Control valve; 51-Moving plate; 6-Inlet pipe; 7-Exhaust pipe; 8-Support base; 9-Reaction tank. Detailed Implementation

[0022] 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.

[0023] The purpose of this invention is to provide a gas-liquid separation and defoaming device to solve the problems existing in the prior art, reduce production costs, and improve product quality.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] This embodiment provides a gas-liquid separation and defoaming device. Please refer to [link to relevant documentation]. Figure 1 The system includes a separation device 1 and a negative pressure device 2. The separation device 1 has an inlet 12, an outlet 13 and a liquid outlet 14 that are connected to the internal separation chamber 11. The inlet 12 is connected to one end of the feed pipe 3, and the other end of the feed pipe 3 is used to extend into the bubble layer of the flue gas channel 4. The negative pressure device 2 is connected to the outlet 13. The negative pressure device 2 is used to provide negative pressure so that bubbles are drawn into the separation chamber 11 through the inlet 12 and the feed pipe 3. The bubbles can be separated into gas and liquid in the separation chamber 11, and the separated liquid can flow back into the flue gas channel 4 through the liquid outlet 14.

[0027] For the bubbles generated in the flue gas channel 4 of the reaction tank 9, under the negative pressure suction of the negative pressure device 2, the generated bubbles can be sucked into the separation chamber 11 of the separation device 1 through the feed pipe 3 and the feed port 12. The bubbles carrying liquid undergo gas-liquid separation in the separation chamber 11, and the liquid flows back to the flue gas channel 4 through the liquid outlet 14 to mix with the liquid in the reaction tank 9. The drug cost in the liquid can be reused, reducing waste. Moreover, compared with adding defoaming agent, directly removing the bubbles reduces the cost, facilitates maintenance and setup, and can improve product quality.

[0028] In addition, the feed end of the feed pipe 3 is about 0.2-0.6 meters above the liquid surface of the reaction tank 9, which can stably absorb air bubbles while avoiding the absorption of reaction liquid.

[0029] In the optional scheme of this embodiment, more preferably, the separation device 1 is configured as a separation tank, the separation tank is arranged vertically, and the top and bottom of the separation tank are respectively provided with an air outlet 13 and a liquid outlet 14, and the feed inlet 12 is provided at the top of the side wall of the separation tank.

[0030] The separator is vertically positioned to allow the liquid to flow to the outlet 14 under gravity, and the air outlet 13 can be discharged from the outlet under the action of the negative pressure device 2.

[0031] In the optional embodiments of this example, it is more preferred that the feed inlet 12 can feed material along the tangential direction of the separator.

[0032] The tangential feeding method helps to promote rapid separation of the gas and liquid phases, reduce liquid entrainment, and allow the liquid to settle more quickly to the inner wall of the separator under centrifugal force, thereby reducing the residue of liquid droplets in the gas and improving separation efficiency.

[0033] In the optional solutions of this embodiment, a more preferred option is described in the following description: Figure 2 The separator includes a spiral guide plate 15 disposed on the inner wall of the separator chamber 11, and the upper end of the spiral guide plate 15 is connected to the feed inlet 12.

[0034] The spiral guide plate 15 can guide the fluid entering through the feed inlet 12 to form a spiral motion, thereby enhancing the gas-liquid separation efficiency.

[0035] The inner diameter of the separation chamber 11 is larger than the inner diameter of the feed pipe 1. Specifically, the inner diameter of the separation chamber 11 can be 4-5 times the inner diameter of the feed pipe 1. The fluid in the feed pipe 1 enters the separation chamber 11 and slows down. The slowing down reduces the kinetic energy by reducing the flow rate, making it easier for the droplets to be separated.

[0036] In addition, quick-opening manholes can be installed on the separator tank to facilitate maintenance and cleaning during shutdown.

[0037] In the optional scheme of this embodiment, more preferably, the liquid outlet 14 is provided with a control valve 5, which can control the opening and closing of the liquid outlet 14.

[0038] Among them, by setting control valve 5, the opening and closing of liquid outlet 14 can be controlled, and the separated liquid can be discharged as needed.

[0039] In the optional solutions of this embodiment, a more preferred option is described in the following description: Figure 3The control valve 5 is configured as a movable plate 51, the upper end of which is rotatably connected to the liquid outlet 14. Both the end faces of the movable plate 51 and the liquid outlet 14 are vertically inclined. The movable plate 51 can seal the liquid outlet 14 under the action of gravity, and the movable plate 51 can rotate relative to the liquid outlet 14 under the action of liquid pressure in the separation chamber 11 to open the liquid outlet 14.

[0040] The system features a movable plate 51 rotatably connected to the liquid outlet 14, with the movable plate 51 vertically inclined. Correspondingly, the end face of the liquid outlet 14 is also inclined, allowing the movable plate 51 to automatically seal the liquid outlet 14 under gravity. Furthermore, when a certain amount of liquid accumulates in the separation tank, the movable plate 51 can open the liquid outlet 14 under the pressure of the liquid, thereby enabling the control valve 5 to automatically release liquid. In addition, when the movable plate 51 closes the liquid outlet 14, it can provide a good negative pressure to the separation device 1, allowing bubbles to be stably drawn into the separation device 1, thus preventing the liquid outlet 14 from being constantly open and affecting the suction of bubbles.

[0041] Specifically, the movable plate 51 is made of metal, such as stainless steel, so that it has a certain weight and can seal the liquid outlet 14 under the action of gravity. The upper end of the movable plate 51 can be rotatably connected to the upper outer wall of the liquid outlet 14 through a pin. The tilt angle between the movable plate 51 and the end face of the liquid outlet 14 can be set to 15°, and the specific angle is determined according to the actual situation.

[0042] In the optional embodiments of this example, a sealing layer is preferably provided on the side of the movable plate 51 facing the liquid outlet 14.

[0043] By setting a sealing layer, the sealing performance can be improved when the movable plate 51 covers the liquid outlet 14; specifically, the sealing layer can be set as a sealing adhesive layer.

[0044] In addition, the control valve 5 provided in this embodiment can also be configured as other types of control valves, such as an electrically controlled valve, which can be opened or closed by electrical control.

[0045] In the optional scheme of this embodiment, more preferably, the air inlet of the negative pressure device 2 is connected to the air outlet 13 through the air inlet pipe 6, the exhaust port of the negative pressure device 2 is connected to one end of the exhaust pipe 7, and the other end of the exhaust pipe 7 is used to extend into the flue gas channel 4.

[0046] The negative pressure device 2 draws out the gas separated by the separation device 2 through the air inlet pipe 6 and discharges the gas back into the flue gas channel 4 through the exhaust pipe 7, so that the flue gas can be drawn into the washing system for treatment by the exhaust gas fan, thus avoiding environmental pollution.

[0047] In the optional scheme of this embodiment, more preferably, the gas-liquid separation defoaming device provided in this embodiment further includes a support base 8, which is used to be set on the top of the reaction tank 9, and the separation device 1 and the negative pressure device 2 are both set on the support base 8.

[0048] The gas-liquid separation and defoaming device is arranged on the top of the reaction tank 9 via the support base 8 for defoaming treatment; the separation device 1 and the negative pressure device 2 can be arranged on the support base 8 by conventional means such as bolts. Similarly, the support base 8 can also be arranged on the top of the reaction tank 9 by conventional means such as bolts.

[0049] In the optional embodiments of this example, it is more preferred that the liquid outlet 14 is disposed above the opening of the flue gas channel 4.

[0050] The liquid outlet 14 is positioned above the opening in the flue gas channel 4 so that the liquid flowing out of the liquid outlet 14 can flow back into the reaction tank 9.

[0051] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A gas-liquid separation and defoaming device, characterized in that: The system includes a separation device (1) and a negative pressure device (2). The separation device (1) has an inlet (12), an outlet (13), and a liquid outlet (14) that are connected to the internal separation chamber (11). The inlet (12) is connected to one end of a feed pipe (3), and the other end of the feed pipe (3) is used to extend into the bubble layer of the flue gas channel (4). The negative pressure device (2) is connected to the outlet (13). The negative pressure device (2) is used to provide negative pressure so that bubbles are drawn into the separation chamber (11) through the inlet (12) and the feed pipe (3). The bubbles can be separated into gas and liquid in the separation chamber (11), and the separated liquid can flow back into the flue gas channel (4) through the liquid outlet (14).

2. The gas-liquid separation and defoaming device according to claim 1, characterized in that: The separation device (1) is configured as a separation tank, which is vertically arranged, and the top and bottom of the separation tank are respectively provided with the air outlet (13) and the liquid outlet (14), and the feed inlet (12) is located on the top of the side wall of the separation tank.

3. The gas-liquid separation and defoaming device according to claim 2, characterized in that: The feed inlet (12) is capable of feeding material tangentially into the separator.

4. The gas-liquid separation and defoaming device according to claim 3, characterized in that: The separation tank includes a spiral guide plate (15) disposed on the inner wall of the separation chamber (11), and the upper end of the spiral guide plate (15) is connected to the feed inlet (12).

5. The gas-liquid separation and defoaming device according to claim 1, characterized in that: The outlet (14) is equipped with a control valve (5), which can control the opening and closing of the outlet (14).

6. The gas-liquid separation and defoaming device according to claim 5, characterized in that: The control valve (5) is configured as a movable plate (51), the upper end of which is rotatably connected to the liquid outlet (14). The end faces of the movable plate (51) and the liquid outlet (14) are both vertically inclined. The movable plate (51) can seal the liquid outlet (14) under the action of gravity, and the movable plate (51) can rotate relative to the liquid outlet (14) under the action of liquid pressure in the separation chamber (11) to open the liquid outlet (14).

7. The gas-liquid separation and defoaming device according to claim 6, characterized in that: A sealing layer is provided on the side of the movable plate (51) facing the liquid outlet (14).

8. The gas-liquid separation and defoaming device according to claim 1, characterized in that: The air inlet of the negative pressure device (2) is connected to the air outlet (13) through the air inlet pipe (6), and the exhaust port of the negative pressure device (2) is connected to one end of the exhaust pipe (7). The other end of the exhaust pipe (7) is used to extend into the flue gas passage (4).

9. The gas-liquid separation and defoaming device according to claim 1, characterized in that: It also includes a support base (8), which is used to be set on the top of the reaction tank (9), and the separation device (1) and the negative pressure device (2) are both set on the support base (8).

10. The gas-liquid separation and defoaming device according to claim 1, characterized in that: The liquid outlet (14) is used to be located above the opening of the flue gas channel (4).

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