Vacuum liquid seal tank

Abstract

A vacuum liquid seal tank comprises a tank body, a plurality of liquid inlets are formed in the top of the tank body, a partition plate is arranged in the tank body, and the partition plate divides the inner space of the tank body into a first inner cavity and a second inner cavity; the height of the partition plate is flush with the height of a preset liquid level line in the tank body and is lower than that of the overflow port; an automatic water outlet is further formed in the bottom of the side wall of the second inner cavity, the automatic water outlet is flush with the emptying opening, and the automatic water outlet is externally connected with an inverted-U-shaped pipeline; the liquid outlet is formed in the side wall of the first inner cavity, and a control valve is mounted at the liquid outlet; a top liquid level meter opening is further formed in the top of the tank body, and a liquid level detector used for detecting the liquid level of the first inner cavity is installed at the top liquid level meter opening. The liquid inlet is located in the top of the second inner cavity. The vacuum liquid seal tank integrates a liquid seal function and a separation function, realizes automatic liquid discharge of aromatic hydrocarbon and water, and avoids the overflow phenomenon.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a vacuum liquid sealing tank. Background Art

[0002] Hydrogen peroxide, commonly known as hydrogen peroxide, is an important industrial raw material. The anthraquinone method is the main method for producing hydrogen peroxide in industry today. The anthraquinone method for producing hydrogen peroxide uses 2-ethylanthraquinone and tetrahydro-2-ethylanthraquinone as carriers, trioctyl phosphate and heavy aromatic hydrocarbons as solvents to prepare a working liquid, which mainly includes a hydrogenation process, an oxidation process and an extraction process for the working liquid. The extract is purified to form hydrogen peroxide, and the residual extract is returned to the hydrogenation process through the working liquid treatment process. When the working liquid is treated, a negative pressure is formed through the flash evaporation system. It is necessary to seal the vacuum with a liquid seal tank, and maintain a certain liquid level in the liquid seal tank to ensure that the aromatic vapor with water coming down from the vacuum condenser can be discharged into the liquid seal tank. The aromatic vapor with water will be stratified after condensation in the liquid seal tank, with condensed water in the lower layer and aromatics in the upper layer. The liquid level of the liquid seal tank should be observed at any time, and the working liquid should be discharged in time for recycling. However, the existing liquid seal tank overflows and cannot be automatically drained. It needs to be manually drained manually, and the discharged working liquid needs to be separated and processed in the next process. The workers' operations are cumbersome and their work efficiency is low. If the manual operations are not handled in a timely manner, it will affect production and efficiency. Summary of the invention

[0003] The purpose of the utility model is to provide a vacuum liquid seal tank, which optimizes the structure in view of the hidden dangers and drawbacks that are prone to occur in the prior art. By adding a partition inside the tank body of the liquid seal tank, aromatic hydrocarbons and water are separated, and the automatic drainage function is realized, which eliminates the overflow phenomenon, does not require manual operation, improves the safety and working efficiency of the equipment, and does not require additional separator devices, saving production costs. The technical solution to the above problems is: a vacuum liquid seal tank, including a tank body, the top of the tank body is provided with a plurality of liquid inlets, and the side wall of the tank body is provided with overflow ports, liquid outlets and drain ports from top to bottom in sequence; the side wall of the tank body is also provided with a sight glass and an inspection port; a partition is provided inside the tank body, and the partition divides the internal space of the tank body into a first inner cavity and a second inner cavity; the height of the partition is flush with the height of the preset liquid level line inside the tank body, and is lower than the overflow port; the drain port is respectively provided at the bottom of the side walls of the first inner cavity and the second inner cavity; the bottom of the side wall of the second inner cavity is also provided with an automatic drain port, and the automatic drain port is flush with the drain port, the The automatic drain outlet is externally connected to an inverted U-shaped pipe; the inverted U-shaped pipe includes a liquid inlet pipe, a liquid outlet pipe, and a horizontal connecting pipe; the upper end of the liquid inlet pipe is connected to the upper end of the liquid outlet pipe through a horizontal connecting pipe; the height of the horizontal connecting pipe is flush with the height of a preset liquid level line inside the tank body; the lower end of the liquid inlet pipe is connected to the automatic drain outlet; the liquid outlet is arranged on the side wall of the first inner cavity, and a control valve is installed at the liquid outlet; a top liquid level gauge port is also opened on the top of the tank body, and a liquid level detector for detecting the liquid level of the first inner cavity is installed on the top liquid level gauge port; the liquid inlet is located at the top of the second inner cavity, and the liquid inlet drains the liquid to the inside of the second inner cavity through a drainage pipe.

[0004] A further technical solution is that upper glass level gauge ports are provided at the upper portions of the side walls of the first inner cavity and the second inner cavity, and lower glass level gauge ports are provided at the lower portions of the side walls of the first inner cavity and the second inner cavity.

[0005] A further technical solution is: a vent pipe is provided on the horizontal connecting pipe, and the vent pipe is connected to the horizontal connecting pipe.

[0006] A further technical solution is as follows: a water inlet, a drain port and a spare port are also provided on the top of the tank body.

[0007] A further technical solution is: the liquid level detector is a guided wave radar level meter.

[0008] A further technical solution is: two reinforcing angle steels are symmetrically arranged on the cover plate of the tank body.

[0009] A further technical solution is: a reinforcing rib plate is provided on the bottom plate of the tank body.

[0010] Due to the adoption of the above technical solution, the vacuum liquid sealing tank of the utility model has the following beneficial effects compared with the prior art:

[0011] The utility model adds a partition plate inside the liquid seal tank body to separate aromatic hydrocarbons and water, integrates the liquid seal function and the separation function, realizes automatic drainage of aromatic hydrocarbons and water, avoids overflow, and is automated without manual operation, thereby ensuring safe production and improving work efficiency.

[0012] The technical features of a vacuum liquid sealing tank of the utility model are further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a vacuum liquid sealing tank of the utility model;

[0014] Figure 2 This is a cross-sectional view of a tank body of a vacuum liquid sealing tank of the utility model;

[0015] Figure 3 The utility model is a top view of a vacuum liquid sealing tank.

[0016] In the figure:

[0017] 1-tank body, 101-flat cover, 102-bottom plate, 2-liquid inlet, 3-overflow port, 4-liquid outlet, 5-drain port, 6-sight glass, 7-inspection port, 8-partition, 9-first inner cavity, 10-second inner cavity, 11-liquid level line, 12-automatic drain port, 13-inverted U-shaped pipe, 14-liquid inlet pipe, 15-horizontal connecting pipe, 16-liquid outlet pipe, 17-vent pipe, 18-control valve, 19-top liquid level gauge port, 20-drainage pipe, 21-upper glass liquid level gauge port, 22-lower glass liquid level gauge port, 23-water inlet, 24-vent port, 25-spare port, 26-reinforced angle steel, 27-reinforced rib plate. DETAILED DESCRIPTION

[0018] like Figures 1 to 3As shown, a vacuum liquid seal tank includes a tank body 1, which is a hollow cylindrical tank body with a flat cover 101 and a bottom plate 102. The top of the tank body is provided with a plurality of liquid inlets 2, and the aromatic hydrocarbon vapor with water from the vacuum condenser enters the tank body from the liquid inlet 2. The side wall of the tank body 1 is provided with an overflow port 3, a liquid outlet 4 and a drain port 5 from top to bottom; the overflow port 3, the liquid outlet 4 and the drain port 5 are provided with respective valves. The side wall of the tank body is also provided with a sight glass 6 and an inspection port 7; the sight glass 6 is used to manually observe the liquid level inside the tank body 1; the inspection port 7 is used to facilitate manual entry and exit of the tank body during parking and maintenance operations. A partition 8 is provided inside the tank body 1, and the partition 8 divides the internal space of the tank body into a first inner cavity 9 and a second inner cavity 10. The height of the partition 8 is flush (same) with the height of the preset liquid level line 11 inside the tank body, and is lower than the overflow port 3. The liquid inlet 2 is located at the top of the second inner cavity 10, and the liquid inlet 2 drains the liquid into the second inner cavity 10 through the drainage pipe 20. Because aromatic hydrocarbons are insoluble in water and have a lower density than water, the partition 8 is used to separate water and aromatic hydrocarbons. The working liquid enters the second inner cavity through the drainage pipe 20. During the introduction process, the water sinks and the aromatic hydrocarbons go up. The aromatic hydrocarbons are above the water. As the liquid level rises, when the liquid level is higher than the partition 8, the aromatic hydrocarbons above the water overflow the partition 8 and enter the first inner cavity 9, and the water and aromatic hydrocarbons are separated by the partition 8.

[0019] The drain port 5 is respectively arranged at the bottom of the side wall of the first inner cavity 9 and the second inner cavity 10, and the drain port 5 is used to drain the liquid in the tank body. The bottom of the side wall of the second inner cavity 10 is also provided with an automatic drain port 12, which is flush with the drain port 5 or the height of the automatic drain port 12 is the same as the height of the drain port 5. The automatic drain port 12 is externally connected to an inverted U-shaped pipe 13; the inverted U-shaped pipe 13 includes a liquid inlet pipe 14, a liquid outlet pipe 16, and a horizontal connecting pipe 15; the upper end of the liquid inlet pipe 14 is connected to the upper end of the liquid outlet pipe 16 through the horizontal connecting pipe 15; the height of the horizontal connecting pipe 15 is flush with the height of the preset liquid level line 11 inside the tank body; the lower end of the liquid inlet pipe 14 is connected to the automatic drain port 12. The inverted U-shaped pipe 13 forms a communicating vessel with the second inner cavity 10 of the tank body, and when the liquid level of the second inner cavity 10 reaches the liquid level line 11, the water in the second inner cavity 10 is automatically discharged by the inverted U-shaped pipe 13. In order to facilitate the discharge of water from the second inner cavity 10 and reduce air resistance, a vent pipe 17 is provided on the horizontal connecting pipe 15 , and the vent pipe 17 is communicated with the horizontal connecting pipe 15 .

[0020] The liquid outlet 4 is arranged on the side wall of the first inner cavity 9, and a control valve 18 is installed at the liquid outlet 4; a top liquid level gauge port 19 is also provided at the top of the tank body 1, and a liquid level detector for detecting the liquid level of the first inner cavity is installed at the top liquid level gauge port 19. The liquid level detector is a guided wave radar level gauge. The control system can control the switch of the control valve 18 according to the liquid level signal detected by the liquid level detector. The control valve 18 and the guided wave radar level gauge form an interlock. When the guided wave radar level gauge detects that the liquid level of the first inner cavity 9 is higher than the liquid outlet 4, the control system automatically opens the control valve 18 to discharge the liquid.

[0021] The upper part of the side wall of the first inner cavity 9 and the second inner cavity 10 is provided with an upper glass level gauge port 21, and the lower part of the side wall of the first inner cavity 9 and the second inner cavity 10 is provided with a lower glass level gauge port 22. The upper glass level gauge port 21 and the lower glass level gauge port 22 are both used to install glass level gauges, which are used to detect the liquid level heights of the two inner cavities respectively.

[0022] The top of the tank body 1 is also provided with a water inlet 23 , a drain port 24 and a standby port 25 .

[0023] In order to prevent the tank body from being damaged by vacuum negative pressure and to enhance the rigidity of the tank body 1 , two reinforcing angle steels 26 are symmetrically arranged on the cover plate 101 of the tank body 1 ; and a reinforcing rib plate 27 is arranged on the bottom plate 102 of the tank body 1 .

[0024] The working principle of the automatic separation and automatic drainage of a vacuum liquid sealing tank of the utility model is as follows: the working liquid flows into the interior of the second inner cavity 10 through the drainage pipe, and the working liquid is stratified in the process of entering the tank body, the water sinks, and the aromatic hydrocarbons are in the upper layer of the water. The water at the bottom of the second inner cavity 10 enters the liquid inlet pipe 14 of the inverted U-shaped pipe 13 through the automatic drain port 12. As the liquid level of the working liquid in the second inner cavity 10 increases, the water level of the liquid inlet pipe 14 of the inverted U-shaped pipe 13 also increases with the increase in the liquid level of the working liquid. When the liquid level of the working liquid reaches the liquid level line 11, the aromatic hydrocarbons overflow the partition plate 8 and flow into the first inner cavity 9 for collection. The water level in the inverted U-shaped pipe 13 also reaches the horizontal connecting pipe 15, and then the water is automatically discharged from the liquid outlet pipe 16, so that the water collected in the second inner cavity 10 can be automatically discharged through the inverted U-shaped pipe 13 without manual operation. When the aromatic hydrocarbons collected in the first inner cavity 9 are detected by the guided wave radar level meter to have a liquid level higher than the liquid outlet 4, the control system automatically opens the control valve 18 to automatically discharge the aromatic hydrocarbons without manual operation. The aromatic liquid level is lower than the liquid outlet 4, and the control valve 18 is automatically closed. Therefore, the vacuum liquid seal tank realizes the automatic separation of the working liquid, and the separation can be carried out separately to prevent overflow.

[0025] The parts not involved in this utility model are the same as the existing technology or can be implemented by using the existing technology. The above content is a further detailed description of the utility model in combination with the specific preferred implementation mode. It cannot be determined that the specific implementation of the utility model is limited to the records of the above embodiments. For ordinary technicians in the technical field to which the utility model belongs, they can make some simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A vacuum liquid sealing tank, comprising a tank body, wherein the top of the tank body is provided with a plurality of liquid inlets, and the side wall of the tank body is provided with an overflow port, a liquid outlet and a drain port in sequence from top to bottom; the side wall of the tank body is also provided with a sight glass and an inspection port; characterized in that: A partition is arranged inside the tank body, and the partition divides the internal space of the tank body into a first inner cavity and a second inner cavity; the height of the partition is flush with the height of the preset liquid level line inside the tank body and is lower than the overflow port; the drain port is arranged at the bottom of the side wall of the first inner cavity and the second inner cavity respectively; an automatic drain port is also arranged at the bottom of the side wall of the second inner cavity, and the automatic drain port is flush with the drain port, and the automatic drain port is externally connected to an inverted U-shaped pipe; the inverted U-shaped pipe includes a liquid inlet pipe, a liquid outlet pipe, and a horizontal connecting pipe; the liquid inlet pipe The upper end is connected with the upper end of the liquid outlet pipe through a horizontal connecting pipe; the height of the horizontal connecting pipe is flush with the height of the preset liquid level line inside the tank body; the lower end of the liquid inlet pipe is connected with the automatic drain port; the liquid outlet is arranged on the side wall of the first inner cavity, and a control valve is installed at the liquid outlet; the top of the tank body is also provided with a top liquid level gauge port, and the top liquid level gauge port is equipped with a liquid level detector for detecting the liquid level of the first inner cavity; the liquid inlet is located at the top of the second inner cavity, and the liquid inlet drains the liquid to the inside of the second inner cavity through a drainage tube.

2. A vacuum liquid sealing tank according to claim 1, characterized in that: An upper glass level gauge port is disposed on the upper portion of the side wall of the first inner cavity and the second inner cavity, and a lower glass level gauge port is disposed on the lower portion of the side wall of the first inner cavity and the second inner cavity.

3. A vacuum liquid sealing tank according to claim 1, characterized in that: The horizontal connecting pipe is provided with a vent pipe, and the vent pipe is communicated with the horizontal connecting pipe.

4. The vacuum liquid sealing tank according to claim 1, characterized in that: The top of the tank body is also provided with a water inlet, a drain port and a spare port.

5. The vacuum liquid sealing tank according to claim 1, characterized in that: The liquid level detector is a guided wave radar level meter.

6. The vacuum liquid sealing tank according to claim 1, characterized in that: Two reinforcing angle steels are symmetrically arranged on the cover plate of the tank body.

7. The vacuum liquid sealing tank according to claim 1, characterized in that: The bottom plate of the tank body is provided with a reinforcing rib plate.

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