Gas-liquid separation device for controlling stability of liquid level

Abstract

A gas-liquid separation device for controlling the stability of a liquid level. The gas-liquid separation device comprises a gas spraying heat exchanger (1) and a droplet separator (4), wherein a first end of a cyclone separation section (3) is tangentially connected to a side wall of the droplet separator (4), a barrier layer (5) is provided in the droplet separator (4), the barrier layer (5) is located below a gas outlet of the droplet separator (4) and the cyclone separation section (3) and is located above a liquid collection tank of the droplet separator (4), and there is a gap between the barrier layer (5) and an inner wall of the droplet separator (4).

Description

A gas-liquid separation device for controlling liquid level stability Technical Field

[0001] The utility model belongs to the technical field of pickling waste liquid regeneration and recovery, and in particular relates to a gas-liquid separation device for controlling liquid level stability. Background Art

[0002] The metallurgical, chlor-alkali, and nonferrous metal industries, such as cobalt, nickel, titanium, and molybdenum, industries use a mixture of hydrochloric acid, nitric acid, and hydrofluoric acid to pickle steel, generating large quantities of waste pickling liquid. To reduce production costs and mitigate the environmental impact of waste pickling liquid, these industries often employ acid treatment technology to regenerate and recycle waste pickling liquid, thereby achieving acid recycling. To achieve this, the system utilizes extensive cooling, concentration, and dust removal equipment equipped with droplet separators. This equipment not only significantly improves the production efficiency of the acid treatment system but also effectively enhances its purification and dust removal capabilities, protecting the environment.

[0003] In existing acid treatment systems, due to the influence of tangential swirling airflow, the liquid accumulated at the bottom of the droplet separator often drifts with the current, causing the liquid level to float unsteadily and fluctuate frequently, causing the system to deviate from the control range, resulting in operational difficulties and affecting the normal production of the unit; at the same time, cooling, concentration, dust removal and purification equipment with droplet separators are often simple in structure and lack protective measures. During operation, problems such as spray system damage and nozzle detachment often occur, which enter the circulation system pipe and cannot be removed, causing system blockage and equipment damage, thus affecting the normal operation of the system.

[0004] In view of this, in order to reduce the impact of rotating airflow on liquid level stability, eliminate the risk of damage and detachment of the sprinkler head falling into the pipeline causing blockage, and ensure the normal operation and production of the equipment, a gas-liquid separation device for controlling liquid level stability is proposed.

[0005] Utility Model Content

[0006] The purpose of the utility model is to address the shortcomings of the existing technology and provide a gas-liquid separation device that controls the liquid level to be stable. It is intended to solve the problems of the liquid accumulated at the bottom of the droplet separator in the existing pickling waste liquid regeneration and recovery system due to the influence of the tangential swirling airflow, the unstable liquid level making operation difficult, and the nozzle falling off due to the simple structure and inadequate protection measures, resulting in system pipeline blockage and equipment damage.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A gas-liquid separation device for controlling liquid level stability comprises a gas spray heat exchanger and a droplet separator, wherein both the gas spray heat exchanger and the droplet separator are provided with spray heads, a cyclone separation section and a reflux hose are connected between the gas spray heat exchanger and the droplet separator, a first end of the cyclone separation section is tangentially connected to the side wall of the droplet separator, and a second end of the cyclone separation section is connected to the gas spray heat exchanger, a barrier layer is provided in the droplet separator, the barrier layer is located below the gas outlet of the droplet separator and the cyclone separation section, and above the liquid collecting pool of the droplet separator, and a gap is left between the barrier layer and the inner wall of the droplet separator.

[0009] Optionally, the size of the gap is not greater than the minimum size of the shower head.

[0010] Optionally, the gap width is 5 to 10 cm.

[0011] Optionally, the barrier layer includes a plurality of support beams and a connecting surface connecting two adjacent support beams, one ends of the plurality of support beams are connected to each other, and the other ends of the support beams are provided with a support, which is installed on the inner wall of the droplet separator.

[0012] Optionally, one end of the support beam is connected to a central support ring, and each of the support beams is connected to the outer periphery of the central support ring.

[0013] Optionally, the separation structure is umbrella-shaped, and the center of the separation structure is higher than the edge of the separation structure.

[0014] Optionally, the second end of the cyclone separation section is higher than the highest liquid level in the gas spray heat exchanger, and the first end of the cyclone separation section is located not less than 100 mm above the barrier layer.

[0015] Optionally, the end of the return hose connected to the gas spray heat exchanger is higher than the end of the return hose connected to the droplet separator.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model provides a barrier layer in the droplet separator. The barrier layer is provided between the cyclone separation section and the return hose and is located above the liquid collecting pool of the droplet separator. The device can effectively isolate the influence of the cyclone gas on the fluctuation of the liquid level of the droplet separator while efficiently realizing the separation of water vapor in the gas. The liquid level will not deviate from the control range, reducing the difficulty of operation, thereby ensuring the smooth operation and normal production of the equipment, avoiding system blockage and equipment damage caused by the spray head falling off and entering the circulation system pipeline and being unable to be removed, and ensuring the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of a gas-liquid separation device for controlling liquid level stability provided by an embodiment of the present utility model;

[0019] FIG2 is a top view of the installation positions of the separation structure, cyclone separation section and return hose provided in an embodiment of the present utility model;

[0020] Among them, 1. gas spray heat exchanger; 2. return hose; 3. cyclone separation section; 4. droplet separator; 5. barrier layer; 6. base; 7. support beam; 8. umbrella-shaped surface; 9. spray head. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] The present invention will be further described below with reference to specific embodiments, but this is not intended to limit the present invention.

[0024] A gas-liquid separation device for controlling liquid level stability includes a gas spray heat exchanger 1 and a droplet separator 4, wherein both the gas spray heat exchanger 1 and the droplet separator 4 are provided with a spray head 9, a cyclone separation section 3 and a reflux hose 2 are connected between the gas spray heat exchanger 1 and the droplet separator 4, the first end of the cyclone separation section 3 is tangentially connected to the side wall of the droplet separator 4, and the second end of the cyclone separation section 3 is connected to the gas spray heat exchanger 1, and a barrier layer 5 is provided on the inner wall of the droplet separator 4, the barrier layer is located below the gas outlet of the droplet separator 4 and the cyclone separation section 3, and above the liquid collecting pool of the droplet separator 4, and a gap is left between the edge of the barrier layer 5 and the inner wall of the droplet separator 4.

[0025] As shown in Figures 1 and 2, when in use, first fill the droplet separator 4 with an appropriate amount of liquid, and spray the liquid from the spray heads 9 of the gas spray heat exchanger 1 and the droplet separator 4 through internal circulation or external circulation. 90% of the liquid sprayed in the gas spray heat exchanger 1 falls into the collecting tank at the bottom of the gas spray heat exchanger 1, and enters the collecting tank at the bottom of the droplet separator 4 through the reflux hose 2 under the action of the liquid level difference. The air flow passing through the cyclone separation section 3 contains a small amount of moisture, and enters the droplet separator 4 in a tangential direction through the cyclone separation section 3. Gas-liquid separation is carried out under the action of centrifugal force, and the gas is discharged from the center of the droplet separator 4 into the next-level equipment. The liquid is thrown to the inner wall, falls on the inner wall or the top surface of the barrier layer 5, and flows along the inner wall of the droplet separator 4 or along the top surface of the barrier layer 5 to the outer periphery, and is collected into the collecting tank at the bottom of the droplet separator 4 for continued use in the internal circulation or external circulation. During the entire process, the barrier layer 5 blocks the cyclonic gas coming out of the cyclonic separation section 3 above the liquid level of the liquid collecting pool of the droplet separator 4, effectively isolating the impact of the cyclonic gas on the fluctuation of the liquid level of the droplet separator 4, and ensuring the smooth operation and normal production of the equipment.

[0026] In order to achieve the effect of blocking the sprinkler head, the size of the gap is no larger than the minimum size of the sprinkler head. When the sprinkler system fails and the sprinkler head 9 falls off, the barrier layer 5 has a certain supporting force, and the sprinkler head 9 is directly stuck between the connection surface and the inner wall of the droplet separator 4, that is, the position above the gap, effectively avoiding system blockage caused by the sprinkler head 9 falling off and entering the pipeline.

[0027] Furthermore, the gap is 5 to 10 cm, which is much smaller than the size of the sprinkler head 9 or other equipment accessories that may fall off.

[0028] As a specific embodiment of the barrier layer 5, the barrier layer 5 includes multiple support beams 7 and a connecting surface connecting two adjacent support beams 7. One ends of the multiple support beams 7 are connected to each other, and the other ends of the support beams 7 are provided with supports, which are installed on the inner wall of the droplet separator 4. The support beams 7 are provided to facilitate installation while the separation result itself can retain a certain supporting force to cope with the impact force of the tangential vortex airflow.

[0029] In order to facilitate the gas-water separation of the device, one end of the support beam 7 is connected to a central support ring, and each support beam 7 is respectively connected to the outer periphery of the central support ring. As shown in Figure 2, the central support ring is an annular structure, so that the barrier layer 5 can achieve the barrier effect while not affecting the natural fall of the liquid sprayed in the droplet separator 4 into the collection tank at the bottom.

[0030] As a specific embodiment of the shape of the barrier layer 5, the barrier layer 5 is umbrella-shaped, as shown in Figures 1 and 2. The center of the barrier layer 5 is higher than the edge of the barrier layer 5, that is, the setting height of the central support ring is higher than the setting height of the support. The support beams form an umbrella-shaped skeleton, and the connecting surface forms an umbrella-shaped surface 8, which helps the spray liquid in the droplet separator 4 to fall and avoid water accumulation on the barrier layer 5.

[0031] In order to ensure that the gas-liquid separation process of the pickling waste liquid after spraying and cooling is carried out normally, one end of the cyclone separation section 3 connected to the gas spray heat exchanger 1 is higher than the highest liquid level in the gas spray heat exchanger 1, and one end of the cyclone separation section 3 connected to the droplet separator 4 is higher than the highest liquid level in the droplet separator 4, and is located at least 100 mm above the barrier layer 5, so that the airflow in the cyclone separation section 3 is away from the gas spray heat exchanger 1 and the liquid accumulated in the droplet separator 4, and at the same time avoids the droplets in the airflow splashing back into the cyclone separation section 3 due to being too close to the barrier layer 5.

[0032] Among them, the end of the return hose 2 connected to the gas spray heat exchanger 1 is higher than the end of the return hose 2 connected to the droplet separator 4. The liquid sprayed in the gas spray heat exchanger 1 falls into the collection tank at the bottom, and enters the droplet separator 4 through the return hose 2 under the action of the liquid level difference. It can effectively control the liquid level height in the gas spray heat exchanger 1 so that it is always not higher than the cyclone separation section 3. While cooperating with the continuous cooling and spraying process of the device, the gas-liquid separation effect of the device is guaranteed, and the flow rate in the return hose 2 is not less than 1.0m / s.

[0033] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the present invention specification should be included in the protection scope of the present invention.

Claims

1. A gas-liquid separation device for controlling liquid level stability, comprising a gas spray heat exchanger and a droplet separator, wherein both the gas spray heat exchanger and the droplet separator are provided with a spray head, and a cyclone separation section and a reflux hose are connected between the gas spray heat exchanger and the droplet separator, characterized in that: The first end of the cyclone separation section is tangentially connected to the side wall of the droplet separator, and the second end of the cyclone separation section is connected to the gas spray heat exchanger. A barrier layer is arranged in the droplet separator, and the barrier layer is located below the gas outlet of the droplet separator and the cyclone separation section, and is located above the liquid collecting pool of the droplet separator, and a gap is left between the barrier layer and the inner wall of the droplet separator.

2. The gas-liquid separation device for controlling liquid level stability according to claim 1, characterized in that: The size of the gap is not greater than the minimum size of the shower head.

3. The gas-liquid separation device for controlling liquid level stability according to claim 1, characterized in that: The width of the gap is 5 to 10 cm.

4. The gas-liquid separation device for controlling liquid level stability according to claim 1, characterized in that: The barrier layer includes a plurality of support beams and a connecting surface connecting two adjacent support beams, one ends of the plurality of support beams are connected to each other, and a support is provided at the other end of the support beam, and the support is installed on the inner wall of the droplet separator.

5. The gas-liquid separation device for controlling liquid level stability according to claim 4, characterized in that: One end of the support beam is connected to a central support ring, and each of the support beams is connected to the outer periphery of the central support ring.

6. The gas-liquid separation device for controlling liquid level stability according to claim 1, characterized in that: The separation structure is in an umbrella shape, and the center of the separation structure is higher than the edge of the separation structure.

7. The gas-liquid separation device for controlling liquid level stability according to claim 1, characterized in that: The second end of the cyclone separation section is higher than the highest liquid level in the gas spray heat exchanger, and the first end of the cyclone separation section is located not less than 100 mm above the barrier layer.

8. The gas-liquid separation device for controlling liquid level stability according to claim 1, characterized in that: The end of the return hose connected to the gas spray heat exchanger is higher than the end of the return hose connected to the droplet separator.

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