Aluminum oxide liquid phase on-line analysis pretreatment device and use method thereof

Abstract

The invention discloses an alumina liquid phase on-line analysis pretreatment device and a use method thereof, and relates to the technical field of industrial automation, the alumina liquid phase on-line analysis pretreatment device comprises a closed tank body, a filter membrane, an inlet pipe and an outlet pipe, the filter membrane is horizontally and fixedly arranged at the center position of the tank body, one end of the inlet pipe is communicated with the side wall of the lower part of the tank body, and the other end of the inlet pipe is communicated with the outlet pipe; an inlet valve is arranged on the inlet pipe, the other end of the inlet pipe is communicated with external aluminum oxide solution equipment, one end of the outlet pipe is communicated with the side wall of the upper part of the tank body, an outlet valve is arranged on the outlet pipe, the other end of the outlet pipe is communicated with an external recovery container, and a blow-off pipe is arranged at the bottom of the tank body; according to the invention, automatic filtering and impurity removal can be carried out on a sample, the stability of temperature and pressure is ensured, the operation is carried out in a set of closed environment, the stability of the working environment is ensured, the automation degree is improved, and the requirements of high-precision and real-time monitoring are met.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial automation, and in particular to an aluminum oxide liquid phase online analysis pretreatment device and a use method thereof. Background Art

[0002] ‌The online analyzers of alumina liquid phase composition based on potentiometric titration and chromatographic titration on the market currently have poor measurement accuracy and stability because the equipment itself cannot withstand high temperature, high pressure or solid impurities. The existing method is to precipitate or filter the sample taken out, and then remove the clear liquid for testing. This method requires human operation, has a low degree of automation, is time-consuming and labor-intensive, and affects work efficiency. In addition, during the operation of the personnel, the alumina solution is in contact with the air for a long time, which may cause hardening. It is difficult to meet the high-precision and real-time monitoring requirements of the alumina production process. In addition, manual processing does not accurately control the temperature and does not meet the requirements of online analysis. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides an alumina liquid phase online analysis pretreatment device and a method of using the same, which can automatically filter and remove impurities from samples, ensure the stability of temperature and pressure, and carry out the operation in a closed environment, thereby ensuring the stability of the working environment, improving the degree of automation and meeting the needs of high-precision and real-time monitoring.

[0004] To achieve the above purpose, the present invention is implemented through the following technical scheme: an alumina liquid phase online analysis pretreatment device, comprising a closed tank body, a filter membrane, an inlet pipe and an outlet pipe, the filter membrane is horizontally and fixedly arranged at the center of the tank body, one end of the inlet pipe is connected to the lower side wall of the tank body, an inlet valve is arranged on the inlet pipe, and the other end is connected to an external alumina solution device, one end of the outlet pipe is connected to the upper side wall of the tank body, an outlet valve is arranged on the outlet pipe, and the other end is connected to an external recovery container, and the bottom of the tank body is arranged There is a sewage pipe, and a sewage valve is arranged on the sewage pipe, the sewage pipe is connected with an external waste container, a pressure relief pipe and a sampling pipe are arranged on the top of the tank body respectively, a pressure relief valve is arranged on the pressure relief pipe, a sampling valve is arranged on the sampling pipe, and the sampling pipe is connected with an external detection system, a temperature monitor and a pressure monitor are arranged on the top of the tank body, the temperature monitor is used to monitor the liquid temperature, the inlet valve, outlet valve, sewage valve, pressure relief valve and sampling valve are all solenoid valves, and the solenoid valve, temperature monitor and pressure monitor are all connected with an external control and analysis system.

[0005] Preferably, a flushing pipe is connected to the upper side wall of the tank body, and a flushing valve is provided on the flushing pipe.

[0006] Preferably, the filter membrane is a ceramic membrane or a polymer membrane.

[0007] Preferably, the tank body is made of stainless steel.

[0008] Preferably, the pressure relief pipe is connected to an external air filtration system.

[0009] A method for using an aluminum oxide liquid phase online analysis pretreatment device, the specific steps are as follows: S01: The external control and analysis system transmits signals, closes the drain valve and sampling valve, opens the inlet valve and outlet valve, and the alumina solution material enters the lower part of the tank through the inlet pipe from the external alumina solution equipment. The pressure of the external alumina solution equipment must be greater than the pressure in the tank. The material is filtered from bottom to top through the filter membrane, and the aluminum liquid enters the upper part of the tank. After the liquid level reaches the height of the outlet pipe, it is discharged from the outlet pipe to the external recovery container; S02: After the filtrate is discharged from the outlet pipe for a certain period of time, a signal is transmitted through the external control and analysis system to close the inlet valve and the outlet valve; S03: After the inlet valve and the outlet valve are closed, a signal is transmitted through the external control and analysis system, the pressure relief valve is opened to release pressure through the pressure relief pipe, the pressure monitor monitors the pressure inside the tank, and transmits a signal to the external control and analysis system. After reaching the standard atmospheric pressure, the pressure relief valve is interlocked and closed; S04: The filtrate in the tank is left to stand and cool down naturally. The temperature of the filtrate in the tank is monitored by a temperature monitor. When the filtrate temperature meets the requirements of online analysis, the sampling valve is opened by the interlock, and the sampling tube is used to take samples to the external detection system. S05: After the sampling tube has been sampling for a certain period of time, the sampling valve is closed; S06: Open the pressure relief valve and the drain valve, and use gravity to discharge the material and solid impurities in the tank from the drain pipe to the external waste container; S07: After the sewage pipe has been discharged for a certain period of time, the discharge is completed, and the pressure relief valve and the sewage valve are closed; S08: Repeat steps S01-S07 at regular intervals to pre-treat the material and take samples.

[0010] The present invention provides an aluminum oxide liquid phase online analysis pretreatment device and a use method thereof, which has the following beneficial effects: 1. The present invention can automatically filter and remove impurities from samples, ensure the stability of temperature and pressure, and carry out the test in a closed environment, significantly reducing the impact of the external environment on the measurement results, ensuring the stability of the working environment, and improving the degree of automation, thereby improving production efficiency, meeting the needs of high-precision and real-time monitoring, reducing production costs and risks, and improving production quality; 2. A flushing pipe and a flushing valve are provided above the filter membrane of the tank body of the present invention. After working for a certain period of time, the flushing valve is opened to clean the top of the filter membrane of the tank body, which ensures the filtration efficiency of the filter membrane on the one hand and the cleanliness on the other hand, thereby improving the detection accuracy of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a working schematic diagram of the present invention.

[0012] In the figure: 1. tank body; 2. filter membrane; 3. inlet pipe; 4. outlet pipe; 5. sampling tube; 6. pressure relief pipe; 7. sewage pipe; 8. temperature monitor; 9. flushing pipe; 10. pressure monitor; 31. inlet valve; 41. outlet valve; 51. sampling valve; 61. pressure relief valve; 71. sewage valve; 91. flushing valve. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0014] like Figure 1 As shown, an aluminum oxide liquid phase online analysis pretreatment device comprises a sealed tank body 1, a filter membrane 2, an inlet pipe 3 and an outlet pipe 4, wherein the filter membrane 2 is horizontally and fixedly arranged at the center of the tank body 1, one end of the inlet pipe 3 is connected to the lower side wall of the tank body 1, an inlet valve 31 is arranged on the inlet pipe 3, and the other end is connected to an external aluminum oxide solution device, one end of the outlet pipe 4 is connected to the upper side wall of the tank body 1, an outlet valve 41 is arranged on the outlet pipe 4, and the other end is connected to an external recovery container, a drain pipe 7 is arranged at the bottom of the tank body 1, and a drain valve 71 is arranged on the drain pipe 7, and the drain pipe 7 is connected to an external waste container, a pressure relief pipe 6 and a sampling pipe 5 are respectively arranged on the top of the tank body 1, and the A pressure relief valve 61 is provided on the pressure relief pipe 6, a sampling valve 51 is provided on the sampling tube 5, and the sampling tube 5 is connected to an external detection system. A temperature monitor 8 and a pressure monitor 10 are provided on the top of the tank body 1, and the temperature monitor 8 is used to monitor the liquid temperature. The inlet valve 31, the outlet valve 41, the drain valve 71, the pressure relief valve 61, and the sampling valve 51 are all solenoid valves, and the solenoid valves, the temperature monitor 8 and the pressure monitor 10 are all connected to an external control and analysis system; a flushing pipe 9 is connected to the upper side wall of the tank body 1, and a flushing valve 91 is provided on the flushing pipe 9; the filter membrane 2 is a ceramic membrane or a polymer membrane; the material of the tank body 1 is stainless steel; the pressure relief pipe 6 is connected to an external air filtration system.

[0015] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process, which are as follows: According to the instruction manual Figure 1 It can be known that the present invention transmits signals through the external control and analysis system when working. The external control and analysis system includes the use of PLC control technology and intelligent algorithms, and can perform remote control and data setting and processing. The existing technology can be used to close the drain valve 71 and the sampling valve 51, open the inlet valve 31 and the outlet valve 41, and the alumina solution material enters the lower part of the tank body 1 through the inlet pipe 3 from the external alumina solution equipment. The pressure of the external alumina solution equipment must be greater than the pressure in the tank body 1. The external alumina solution equipment is an alumina production equipment with a large volume and a large pressure. Of course, a pump body can also be set on the inlet pipe 3 to assist in injecting material into the tank body 1. The material in the tank body 1 is filtered from bottom to top through the filter membrane 2. The aluminum liquid enters the upper part of the tank body 1. After the liquid level reaches the height of the outlet pipe 4, it is discharged from the outlet pipe 4 to the external recovery container; after the filtrate is discharged from the outlet pipe 4 for a certain period of time, the certain period of time is the set time, which is determined according to the experimental experience of technicians in this field and the actual situation. The set value is set in the external control and analysis system. The following certain period of time is similar. The signal is transmitted through the external control and analysis system to close the inlet pipe. The inlet valve 31 and the outlet valve 41 are closed; after the inlet valve 31 and the outlet valve 41 are closed, a signal is transmitted through the external control and analysis system to open the pressure relief valve 61 to release the pressure through the pressure relief pipe 6, and the pressure monitor 10 monitors the pressure in the tank body 1 and transmits a signal to the external control and analysis system. After reaching the standard atmospheric pressure, the pressure relief valve 61 is closed by interlocking; the filtrate in the tank body 1 is left to stand for natural heat dissipation and cooling, and the temperature of the filtrate in the tank body 1 is monitored by the temperature monitor 8. After the filtrate temperature meets the online analysis requirements, the online analysis requirements here are determined by technicians in this field according to actual needs. The external control analysis system is set, and then the sampling valve 51 is interlocked to open, and the sampling tube 5 samples to the external detection system. Here, a pump body is set on the sampling tube 5 to extract the filtrate, which is well understood by those skilled in the art; after the sampling tube 5 samples for a certain period of time, the sampling valve 51 is closed; the pressure relief valve 61 and the drain valve 71 are opened, and the material and solid impurities in the tank body 1 are discharged from the drain pipe 7 to the external waste container by gravity; after the drain pipe 7 drains for a certain period of time, that is, the drain is completed, the pressure relief valve 61 and the drain valve 71 are closed; at regular intervals, steps S01-S07 are repeated, the material is pre-treated and sampled, and continuous monitoring is performed. The present invention can automatically filter and remove impurities from the sample, ensure the stability of temperature and pressure, and is carried out in a closed environment, significantly reducing the influence of the external environment on the measurement results, ensuring the stability of the working environment, and improving the degree of automation, thereby improving production efficiency, meeting the needs of high-precision and real-time monitoring, reducing production costs and risks, and improving production quality.

[0016] Among them, a flushing pipe 9 is connected to the upper side wall of the tank body 1, and a flushing valve 91 is arranged on the flushing pipe 9. After a long period of sampling work, regular maintenance is required. The pressure relief valve 61, the sampling valve 51, the outlet valve 41, and the inlet valve 31 are closed, and the flushing valve 91 and the drain valve 71 are opened. The cleaning liquid is injected into the flushing pipe 9 and finally discharged from the drain pipe 7 to backwash the tank body 1 and the filter membrane 2. On the one hand, the filtration efficiency of the filter membrane 2 is guaranteed, and on the other hand, the cleanliness is guaranteed to improve the detection accuracy of the sample.

[0017] The filter membrane 2 is a ceramic membrane or a polymer membrane, and its high filtering accuracy and corrosion resistance can ensure the filtering effect and service life.

[0018] The material of the tank body 1 is stainless steel. To ensure the stability of the pressure and the alkaline environment of the alumina solution, the tank body 1 made of stainless steel will have a better effect.

[0019] In addition, the pressure relief pipe 6 is connected to an external air filtering system to prevent external impurities from entering the tank body 1.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aluminum oxide liquid phase online analysis pretreatment device, characterized in that: The invention comprises a sealed tank body (1), a filter membrane (2), an inlet pipe (3) and an outlet pipe (4), wherein the filter membrane (2) is horizontally and fixedly arranged at the center of the tank body (1), one end of the inlet pipe (3) is connected to the lower side wall of the tank body (1), an inlet valve (31) is arranged on the inlet pipe (3), and the other end is connected to an external alumina solution device, one end of the outlet pipe (4) is connected to the upper side wall of the tank body (1), an outlet valve (41) is arranged on the outlet pipe (4), and the other end is connected to an external recovery container, a sewage pipe (7) is arranged at the bottom of the tank body (1), and a sewage valve (71) is arranged on the sewage pipe (7), and the sewage pipe (7) is connected to the external The tank body (1) is connected to a waste container, a pressure relief pipe (6) and a sampling pipe (5) are respectively arranged on the top of the tank body (1), a pressure relief valve (61) is arranged on the pressure relief pipe (6), a sampling valve (51) is arranged on the sampling pipe (5), and the sampling pipe (5) is connected to an external detection system, a temperature monitor (8) and a pressure monitor (10) are arranged on the top of the tank body (1), the temperature monitor (8) is used to monitor the liquid temperature, the inlet valve (31), the outlet valve (41), the drain valve (71), the pressure relief valve (61), and the sampling valve (51) are all solenoid valves, and the solenoid valve, the temperature monitor (8) and the pressure monitor (10) are all connected to an external control and analysis system.

2. The aluminum oxide liquid phase online analysis pre-processing device according to claim 1, characterized in that: The upper side wall of the tank body (1) is connected to a flushing pipe (9), and a flushing valve (91) is provided on the flushing pipe (9).

3. The aluminum oxide liquid phase online analysis pre-processing device according to claim 1, characterized in that: The filter membrane (2) is a ceramic membrane or a polymer membrane.

4. The aluminum oxide liquid phase online analysis pretreatment device according to claim 1, characterized in that: The material of the tank body (1) is stainless steel.

5. The aluminum oxide liquid phase online analysis pre-processing device according to claim 1, characterized in that: The pressure relief pipe (6) is connected to an external air filtering system.

6. A method for using the alumina liquid phase online analysis pretreatment device according to claims 1-5, characterized in that: The specific steps are as follows: S01: A signal is transmitted through an external control and analysis system to close the drain valve (71) and the sampling valve (51), and to open the inlet valve (31) and the outlet valve (41). The aluminum oxide solution material enters the lower part of the tank body (1) from the external aluminum oxide solution equipment through the inlet pipe (3). The pressure of the external aluminum oxide solution equipment must be greater than the pressure in the tank body (1). The material is filtered from bottom to top through the filter membrane (2). The aluminum liquid enters the upper part of the tank body (1). After the liquid level reaches the height of the outlet pipe (4), it is discharged from the outlet pipe (4) to the external recovery container; S02: After the filtrate is discharged from the outlet pipe (4) for a certain period of time, a signal is transmitted through the external control and analysis system to close the inlet valve (31) and the outlet valve (41); S03: After the inlet valve (31) and the outlet valve (41) are closed, a signal is transmitted through the external control and analysis system to open the pressure relief valve (61) to release the pressure through the pressure relief pipe (6). The pressure monitor (10) monitors the pressure inside the tank (1) and transmits a signal to the external control and analysis system. After the standard atmospheric pressure is reached, the pressure relief valve (61) is closed by interlocking; S04: The filtrate in the tank body (1) is left to stand for natural heat dissipation and cooling, and the temperature of the filtrate in the tank body (1) is monitored by a temperature monitor (8). When the filtrate temperature meets the requirements of online analysis, the sampling valve (51) is opened through an interlock, and the sampling tube (5) takes samples to an external detection system; S05: After the sampling tube (5) has been sampling for a certain period of time, the sampling valve (51) is closed; S06: Open the pressure relief valve (61) and the sewage valve (71), and discharge the material and solid impurities in the tank (1) from the sewage pipe (7) to an external waste container by gravity; S07: After the sewage pipe (7) has been draining for a certain period of time, the sewage discharge is completed, and the pressure relief valve (61) and the sewage discharge valve (71) are closed; S08: Repeat steps S01-S07 at regular intervals to pre-treat the material and take samples.

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