Continuous fluid infusion rectification vacuum unit

Abstract

The utility model discloses a continuous liquid supplement rectification vacuum unit, which comprises a liquid supplement assembly and a liquid discharge assembly, the liquid supplement assembly and the liquid discharge assembly are respectively communicated with a liquid separation tank, the liquid separation tank is arranged at the outlet end of the vacuum unit, and a detection assembly is arranged in the liquid separation tank. The detection assembly is in signal connection with the liquid supplementing assembly and the liquid discharging assembly so as to control liquid supplementing and liquid discharging of the liquid separation tank to ensure that light components in the liquid separation tank are discharged in time; the liquid supplementing assembly and the liquid discharging assembly are arranged on the liquid separation tank at the outlet of an original vacuum unit, original low-liquid-level liquid supplementing is changed into continuous liquid supplementing and continuous liquid discharging, the situation that light components in the liquid separation tank are gathered and gasified, consequently, the vacuum pump is large in operation sound and vibration is avoided, it is guaranteed that the gathered light components can be discharged in time, and the service life of the vacuum unit is prolonged. And long-period stable operation of the vacuum unit is guaranteed, and the device is suitable for various severe working conditions.

Description

Technical Field

[0001] This utility model relates to the field of distillation technology, specifically to a continuous liquid replenishment distillation vacuum unit. Background Technology

[0002] During the negative pressure process of the NMP distillation column, light components accumulate in the gas-liquid separator at the vacuum pump outlet. Under these temperature and negative pressure conditions, some of the light components will vaporize, resulting in loud noise and vibration from the vacuum pump.

[0003] In the existing technology, a DN25 pipeline is led out from the four-tower bottom pump to replenish the working fluid of the vacuum machine's component liquid tank. The replenishing working fluid is NMP, and replenishment is performed when the liquid level in the liquid tank is low. The above setup does not take into account the accumulation of light components in the vacuum machine's component liquid tank and pump chamber. Under normal production operation conditions, some light components will vaporize under these temperature and pressure conditions, resulting in loud noise and vibration of the vacuum pump, and will also affect the service life of the vacuum pump.

[0004] Therefore, the existing technology needs further improvement. Utility Model Content

[0005] To address the shortcomings of existing technologies, a continuous liquid replenishment distillation vacuum unit is proposed, which solves the problem in the background technology that some light components will vaporize under certain temperature and pressure conditions, resulting in loud noise and vibration of the vacuum pump and affecting its service life.

[0006] To achieve the above objectives, the present invention proposes the following technologies:

[0007] A continuous replenishment distillation vacuum unit includes a replenishment component and a draining component, which are respectively connected to a separatory tank. The separatory tank is located at the outlet end of the vacuum unit. A detection component is installed inside the separatory tank. The detection component is connected to the replenishment component and the draining component to control the replenishment and draining of the separatory tank to ensure that the light components in the separatory tank are discharged in a timely manner.

[0008] Furthermore, the replenishment assembly includes a replenishment tube, one end of which is connected to the top of the dispensing tank, and the other end is equipped with a replenishment pump located inside the storage tank.

[0009] Furthermore, the drainage assembly includes a drainage pipe, one end of which is connected to the bottom of the separator, and the other end of which is equipped with a drainage pump, which is installed inside the storage tank.

[0010] Furthermore, the detection component includes a temperature sensor, which is signal-connected to the replenishment pump. The temperature sensor detects the temperature inside the dispensing tank to control whether the replenishment pump is started to replenish the dispensing tank.

[0011] Furthermore, the detection component also includes a first liquid level sensor, which is signal-connected to the replenishment pump. The first liquid level sensor detects the liquid level in the dispensing tank to control whether the replenishment pump is started to replenish the dispensing tank.

[0012] Furthermore, the detection component also includes a second liquid level sensor, which is signal-connected to the drain pump. The second liquid level sensor detects the liquid level in the separator to control whether the drain pump is started to drain the liquid from the separator.

[0013] Furthermore, the temperature sensor has a higher priority than the first liquid level sensor, and the temperature sensor controls the replenishment pump to start after detecting that the temperature inside the dispensing tank is higher than the set value.

[0014] Furthermore, it also includes a distillation column and a condenser, wherein the vapor outlet of the distillation column is connected to the condenser via a pipeline, and the separator is connected to the distillation column via a reflux pipeline to facilitate the reintroduction of light components into the distillation column.

[0015] Compared with the prior art, the comprehensive effects brought about by this utility model include:

[0016] By installing a liquid replenishment component and a liquid discharge component in the liquid separator at the outlet of the original vacuum unit, the original low liquid level replenishment is changed to continuous replenishment and continuous discharge. This avoids the accumulation and vaporization of light components in the liquid separator, which would cause the vacuum pump to operate with loud noise and vibration. It ensures that the accumulated light components are discharged in a timely manner, ensuring the long-term stable operation of the vacuum unit, which is suitable for various harsh working environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall process of an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the liquid separator in an embodiment of this utility model.

[0019] Legend: 1. Separating tank; 2. Replenishing pipe; 3. Replenishing pump; 4. Storage tank; 5. Drain pipe; 6. Drain pump; 7. Temperature sensor; 8. First liquid level sensor; 9. Second liquid level sensor; 10. Condenser. Detailed Implementation

[0020] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In this document, terms such as “up,” “down,” “left,” “right,” and “top” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figures 1 to 2 As shown, a continuous liquid replenishment distillation vacuum unit includes a liquid replenishment component and a liquid discharge component. The liquid replenishment component and the liquid discharge component are respectively connected to a liquid separator 1. The liquid separator 1 is located at the outlet end of the vacuum unit. A detection component is installed inside the liquid separator 1. The detection component is connected to the liquid replenishment component and the liquid discharge component by signal to control the liquid replenishment and liquid discharge of the liquid separator 1 to ensure that the light components in the liquid separator 1 are discharged in a timely manner.

[0023] By installing a liquid replenishment component and a liquid discharge component in the liquid separator 1 at the outlet of the original vacuum unit, the original low liquid level liquid replenishment is changed to continuous liquid replenishment and continuous liquid discharge. This avoids the accumulation and vaporization of light components in the liquid separator 1, which would cause the vacuum pump to operate with loud noise and vibration. It ensures that the accumulated light components are discharged in time, ensuring the long-term stable operation of the vacuum unit, which is suitable for various harsh working environments.

[0024] In the continuous replenishment distillation vacuum unit of this embodiment, the replenishment component includes a replenishment pipe 2, one end of which is connected to the top of the liquid separator 1, and the other end is equipped with a replenishment pump 3, which is located inside the storage tank 4. The draining component includes a drain pipe 5, one end of which is connected to the bottom of the liquid separator 1, and the other end of which is equipped with a drain pump 6, which is installed inside the storage tank 4.

[0025] With the above settings, liquid is replenished to the separatory tank 1 through the replenishment pump 3 and the replenishment pipe 2, and liquid is drained in conjunction with the drain pipe 5 and the drain pump 6, thereby maintaining the separatory tank 1 in a state of continuous replenishment and continuous drainage, avoiding the liquid level in the separatory tank 1 from being too low, which would cause the liquid to form light components and accumulate in the separatory tank 1. The replenishment of liquid allows the light components in the separatory tank 1 to be discharged in time, ensuring the stable operation of the vacuum unit.

[0026] Preferably, both the replenishment pump 3 and the drain pump 6 are located inside the storage tank 4, so that the replenishment and drain processes form a loop and can be recycled.

[0027] In the continuous liquid replenishment distillation vacuum unit of this embodiment, the detection component includes a temperature sensor 7, which is signal-connected to the liquid replenishment pump 3. The temperature sensor 7 detects the temperature inside the liquid separator 1 to control whether the liquid replenishment pump 3 is started to replenish the liquid separator 1.

[0028] Since light components are easily generated under excessively high temperatures and negative pressure conditions, a temperature sensor 7 is installed in the separatory tank 1 to detect the temperature inside the separatory tank 1 and set a limit temperature value. This limit value is close to the stable temperature at which light components are generated. When the temperature inside the separatory tank 1 reaches the limit value, the temperature sensor 7 generates a signal and transmits it to the replenishment pump 3 to control its start and replenish the separatory tank 1 to achieve a cooling effect, thereby avoiding the generation of light components or reducing the conversion amount of light components to a certain extent.

[0029] In the continuous liquid replenishment distillation vacuum unit of this embodiment, the detection component further includes a first liquid level sensor 8, which is signal-connected to the liquid replenishment pump 3. The first liquid level sensor 8 detects the liquid level in the liquid separator 1 to control whether the liquid replenishment pump 3 is started to replenish the liquid separator 1.

[0030] A first liquid level sensor 8 is set to detect the liquid level of the separator 1 to prevent the liquid level in the separator 1 from being too low and generating light components. The first liquid level sensor 8 is installed at the bottom of the separator 1. When the liquid level in the separator 1 is lower than the first liquid level sensor 8, the replenishment pump 3 is controlled to start to replenish the liquid.

[0031] Preferably, the temperature sensor 7 has a higher priority than the first liquid level sensor 8. After the temperature sensor 7 detects that the temperature in the liquid distribution tank 1 is higher than the set value, it controls the liquid replenishment pump 3 to start, so as to avoid the liquid level in the liquid distribution tank 1 not reaching the set liquid level value and the temperature being too high, resulting in the generation of a large amount of light components.

[0032] In the continuous liquid replenishment distillation vacuum unit of this embodiment, the detection component further includes a second liquid level sensor 9. The second liquid level sensor 9 is signal-connected to the drain pump 6. The second liquid level sensor 9 detects the liquid level in the separator 1 to control whether the drain pump 6 is started to drain the liquid from the separator 1.

[0033] like Figure 2 As shown, other pipelines connected to the separatory tank 1 are not shown. The installation positions of the replenishment pipe 2 and the drain pipe 5 to the separatory tank 1 are set as shown in the figure. In addition, a second liquid level sensor 9 is set to detect the liquid level in the separatory tank 1 to prevent excessive replenishment and overflow caused by a high liquid level in the separatory tank 1. The installation position of the second liquid level sensor 9 in the separatory tank 1 is higher than that of the first liquid level sensor 8. When the liquid level in the separatory tank 1 is higher than that of the second liquid level sensor 9, the drain pump 6 is controlled to start to drain the liquid. The above settings ensure that the liquid level in the separatory tank 1 rises after replenishment and avoid the liquid level remaining unchanged due to the simultaneous start of replenishment and drain.

[0034] The continuous replenishment distillation vacuum unit in this embodiment also includes a distillation column and a condenser 10. The vapor outlet of the distillation column is connected to the condenser 10 via a pipeline, and the separator 1 is connected to the distillation column via a reflux pipeline so that the light components can re-enter the distillation column.

[0035] Specifically, when the liquid level in the distillation column reaches a certain level, the distillation column starts operating to heat the wastewater raw liquid. When heated to a certain temperature, the light components in the wastewater raw liquid form vapor and rise to the top of the distillation column, and then enter the condenser 10 through the pipeline for condensation. The light components in the separator 1 return to the distillation column and enter the condenser 10 for condensation.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "rotation", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described in detail, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous make-up rectification vacuum unit, characterized in that, It includes a replenishment component and a draining component, which are respectively connected to a separatory tank. The separatory tank is located at the outlet end of the vacuum unit. A detection component is installed inside the separatory tank. The detection component is connected to the replenishment component and the draining component to control the replenishment and draining of the separatory tank to ensure that the light components in the separatory tank are discharged in a timely manner. The replenishment assembly includes a replenishment tube, one end of which is connected to the top of the dispensing tank, and the other end is equipped with a replenishment pump, which is located inside the storage tank. The detection component includes a temperature sensor, which is signal-connected to the replenishment pump. The temperature sensor detects the temperature inside the dispensing tank to control whether the replenishment pump is started to replenish the dispensing tank. The detection component also includes a first liquid level sensor, which is signal-connected to the replenishment pump. The first liquid level sensor detects the liquid level in the dispensing tank to control whether the replenishment pump is started to replenish the dispensing tank. The detection component also includes a second liquid level sensor, which is signal-connected to the drain pump. The second liquid level sensor detects the liquid level in the separator to control whether the drain pump is started to drain the liquid from the separator. The temperature sensor has a higher priority than the first liquid level sensor. After the temperature sensor detects that the temperature inside the dispensing tank is higher than the set value, it controls the start of the replenishment pump.

2. The continuously reboots rectifying vacuum unit of claim 1, wherein, The drainage assembly includes a drainage pipe, one end of which is connected to the bottom of the separator, and the other end of which is equipped with a drainage pump, which is installed inside the storage tank.

3. The continuous liquid replenishment distillation vacuum unit according to claim 2, characterized in that, It also includes a distillation column and a condenser, wherein the vapor outlet of the distillation column is connected to the condenser via a pipeline, and the separator is connected to the distillation column via a reflux pipeline to allow light components to re-enter the distillation column.

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