Method and system for automatically calibrating salinity of a water content analyzer

Abstract

The present invention belongs to the field of detection technology, and particularly relates to a method and system for automatically calibrating the salinity of a moisture content analyzer. The system includes a computer, a constant temperature bath, a temperature controller, a calibration solution storage tank, a two-way peristaltic pump, a pump controller, and a calibration cylinder; the computer controls the temperature controller to adjust the temperature of the constant temperature bath; the computer realizes the forward and reverse movement of the two-way peristaltic pump by controlling the pump controller; the calibration solution storage tank is arranged in the constant temperature bath, the calibration solution storage tank stores calibration solution, and the two-way peristaltic pump is connected to the calibration solution storage tank and the calibration cylinder respectively through pipelines. The present invention can automatically calibrate the system under different temperatures and different salinities, which will greatly reduce the calibration cost, save the calibration time, and reduce the labor intensity.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection, and particularly relates to a method and system for automatically calibrating the salinity of a water cut analyzer. Background Art

[0002] Water cut analyzers are applied in many industries such as petroleum and chemical industries. For the petroleum industry, in addition to oil and water in the crude oil to be detected, there are many minerals. These mineral components are complex, resulting in a relatively high conductivity of the crude oil, and the conductivity is also greatly affected by temperature, which will affect the water cut detection of the water cut analyzer. In order to eliminate the influence of salinity, it is necessary to calibrate different salinities under different temperature conditions during the instrument production process. On the one hand, it is to detect the instrument performance, and on the other hand, it is to compensate for the influence of salinity to improve the accuracy of the water cut analyzer.

[0003] Generally speaking, the salinity of crude oil varies from 1000 ppm to 250000 ppm, and the higher the temperature, the greater the influence on water cut detection. If calibration is carried out for each different temperature and salinity condition, the workload is huge, and it will cause waste of calibration liquid. Summary of the Invention

[0004] The present invention provides a system for automatically calibrating the salinity of a water cut analyzer, which can automatically carry out the automatic calibration system under different temperatures and different salinities, greatly reducing the calibration cost, saving calibration time, and reducing the labor intensity.

[0005] The present invention adopts the following technical solutions:

[0006] A system for automatically calibrating the salinity of a water cut analyzer, characterized in that:

[0007] It includes a computer, a constant temperature bath, a temperature controller, a calibration liquid storage tank, a two-way peristaltic pump, a pump controller and a calibration cylinder;

[0008] The computer controls the temperature controller to adjust the temperature of the constant temperature bath; the computer controls the forward and reverse movement of the two-way peristaltic pump by controlling the pump controller;

[0009] The calibration liquid storage tank is arranged in the constant temperature bath, the calibration liquid storage tank stores calibration liquid, and the two-way peristaltic pump is connected to the calibration liquid storage tank and the calibration cylinder respectively through pipelines.

[0010] Preferably, it further includes a power supply, and the power supply supplies power to the whole system.

[0011] Preferably, the number of the above-mentioned calibration liquid storage tanks and two-way peristaltic pumps is multiple, and each calibration liquid storage tank corresponds to a two-way peristaltic pump.

[0012] Preferably, the pipeline connecting the bidirectional peristaltic pump and the calibration cylinder is in a U-shape, and the highest point of the U-shaped pipeline is higher than the calibration cylinder.

[0013] Preferably, the computer controls the thermostat and the pump controller through the RS485 communication port by running the calibration software.

[0014] Preferably, the pipeline connecting the bidirectional peristaltic pump and the calibration liquid storage tank is a silicone hose.

[0015] Preferably, the constant temperature bath is a water bath constant temperature bath.

[0016] In addition, based on the above-mentioned salinity automatic calibration system of the water content analyzer, the present invention also provides a method for automatically calibrating the salinity of the water content analyzer, which is characterized by including the following steps:

[0017] 1) Start the thermostat, heat the water temperature in the water bath constant temperature bath to the first set temperature, and keep it constant;

[0018] 2) Start the pump controller of the first calibration liquid storage tank, control the corresponding bidirectional peristaltic pump to rotate forward, and extract the calibration liquid into the calibration cylinder;

[0019] 3) The computer communicates with the water content analyzer, reads various data under the conditions of this temperature and this salinity, and records and displays them;

[0020] 4) After the calibration of this item is completed, the computer starts the pump controller, controls the bidirectional peristaltic pump to rotate in reverse, and extracts the calibration liquid in the calibration cylinder into the calibration liquid storage tank;

[0021] 5) The computer starts the calibration of the next calibration liquid, and repeats steps 2)-4);

[0022] 6) After completing the calibration of the calibration liquid in all calibration liquid storage tanks, set the thermostat to enter the next constant temperature point, and repeat the process of steps 2)-5);

[0023] 7) After completing the calibration of all temperature points, form a calibration data report, remove the calibrated water content analyzer, and wait for it to cool down before calibrating the next instrument.

[0024] Advantages of the present invention:

[0025] The present invention provides a salinity automatic calibration system and method for a water content analyzer. By using the salinity automatic calibration system of the water content analyzer of the present invention, an automatic calibration system under different temperatures and different salinities can be automatically carried out, which will greatly reduce the calibration cost, save the calibration time, and reduce the labor intensity. Brief Description of the Drawings

[0026] Figure 1This is the system block diagram of the salinity automatic calibration system of a water content analyzer according to the present invention. Specific embodiments

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the tables and drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0028] See Figure 1 , a salinity automatic calibration system for a water content analyzer, including a computer, a constant temperature bath, a temperature controller, a calibration solution storage tank, a two-way peristaltic pump, a pump controller, a calibration cylinder, and a power supply.

[0029] The computer controls the temperature controller to adjust the temperature of the constant temperature bath; the computer realizes the forward and reverse movement of the two-way peristaltic pump by controlling the pump controller; the calibration solution storage tank is arranged in the constant temperature bath, and calibration solution is stored in the calibration solution storage tank. The two-way peristaltic pump is connected to the calibration solution storage tank and the calibration cylinder through pipelines respectively. The power supply supplies power to the entire system.

[0030] As a preferred embodiment of the present invention, the number of the above-mentioned calibration solution storage tanks is multiple, and each calibration solution storage tank corresponds to a two-way peristaltic pump. Preferably, the above-mentioned constant temperature bath is a water bath constant temperature bath.

[0031] According to needs, calibration solutions with different salinities are stored in their respective calibration solution storage tanks. The calibration solution storage tanks are placed in the water bath constant temperature bath and can be heated by the water bath constant temperature bath. The temperature control of the water bath constant temperature bath is directly implemented by the temperature controller, and at the same time, it receives and executes the RS485 bus control command of the computer.

[0032] As a preferred embodiment of the present invention, the pipeline connecting the two-way peristaltic pump and the calibration cylinder is in a shape of "J", and the highest point of the "J" - shaped pipeline is higher than the calibration cylinder. This avoids the reverse flow of the calibration solution in the calibration cylinder back to the storage tank. The above-mentioned computer runs calibration software, and each two-way peristaltic pump is controlled by its own pump controller for speed and forward and reverse rotation, and the control instructions are sent by the computer through the RS485 bus.

[0033] Preferably, the pipeline connecting the two-way peristaltic pump and the calibration solution storage tank is a silicone hose.

[0034] In addition, based on the above salinity automatic calibration system of the water cut analyzer, the present invention also proposes a method for automatically calibrating the salinity of the water cut analyzer. After the water cut analyzer to be calibrated and detected is installed on the calibration cylinder, the following steps are started:

[0035] 1) Start the thermostat, heat the water temperature in the water bath thermostat to the first set temperature, and keep it constant.

[0036] 2) Start the pump controller of the first calibration liquid storage tank, control the corresponding two-way peristaltic pump to rotate forward, and extract the calibration liquid into the calibration cylinder; the volume of the extracted calibration liquid is preset by the calibration software. After reaching the set volume, the peristaltic pump stops, and the calibration liquid will not flow back, nor will it flow into other storage tanks beyond the highest point of the silicone hose of other peristaltic pumps.

[0037] 3) The computer communicates with the water cut analyzer, reads various data under the conditions of this temperature and this salinity, and records and displays them.

[0038] 4) After the calibration of this item is completed, the computer starts the pump controller, controls the two-way peristaltic pump to rotate in reverse, and extracts the calibration liquid in the calibration cylinder into the calibration liquid storage tank; because the peristaltic pump has a self-priming function, it can suck the calibration liquid remaining in the calibration cylinder clean.

[0039] 5) The computer starts the calibration of the next calibration liquid, and repeats steps 2)-4);

[0040] 6) After completing the calibration of the calibration liquid in all calibration liquid storage tanks, set the thermostat to the next constant temperature point, and repeat the process of steps 2)-5);

[0041] 7) After completing the calibration of all temperature points, form a calibration data report, remove the calibrated water cut analyzer, and wait for it to cool down before calibrating the next instrument.

[0042] The above are only the embodiments of the present invention, and do not limit the protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related system fields, shall be included in the protection scope of the present invention by the same token.

Claims

1. An automatic calibration system for salinity of a water content analyzer, characterized in that: It includes a computer, a constant temperature bath, a temperature controller, a calibration solution storage tank, a two-way peristaltic pump, a pump controller, and a calibration cylinder; The computer controls the temperature controller to adjust the temperature of the constant temperature bath; the computer controls the forward and reverse movements of the two-way peristaltic pump by controlling the pump controller; The calibration solution storage tank is arranged in the constant temperature bath, and the calibration solution is stored in the calibration solution storage tank. The two-way peristaltic pump is connected to the calibration solution storage tank and the calibration cylinder respectively through pipelines; The pipeline connecting the two-way peristaltic pump and the calibration cylinder is in a shape of "J", and the highest point of the "J"-shaped pipeline is higher than the calibration cylinder; The number of the calibration solution storage tanks and the two-way peristaltic pumps is multiple, and each calibration solution storage tank corresponds to a two-way peristaltic pump; The computer controls the temperature controller and the pump controller through the RS485 communication port by running the calibration software.

2. The automatic calibration system for salinity of a water content analyzer according to claim 1, characterized in that: It further includes a power supply, and the power supply supplies power to the whole system.

3. The automatic calibration system for salinity of a water content analyzer according to claim 1, characterized in that: The pipeline connecting the two-way peristaltic pump and the calibration solution storage tank is a silica gel hose.

4. The automatic calibration system for salinity of a water content analyzer according to claim 3, characterized in that: The constant temperature bath is a water bath constant temperature bath.

5. An automatic calibration method for salinity of a moisture content analyzer, characterized in that, Using the automatic calibration system for salinity of a water content analyzer according to claim 4, it includes the following steps: 1) After the water content analyzer to be calibrated and detected is installed on the calibration cylinder, start the temperature controller, heat the water temperature in the water bath constant temperature bath to the first set temperature, and keep it constant; 2) Start the pump controller of the first calibration solution storage tank, control the corresponding two-way peristaltic pump to rotate forward, and extract the calibration solution into the calibration cylinder; 3) The computer communicates with the water content analyzer, reads various data under the conditions of this temperature and this salinity, and records and displays them; 4) After the calibration of this item is completed, the computer starts the pump controller, controls the two-way peristaltic pump to rotate reversely, and extracts the calibration solution in the calibration cylinder into the calibration solution storage tank; 5) The computer starts the calibration of the next calibration solution, and repeats steps 2)-4); 6) After the calibration of the calibration solution in all calibration solution storage tanks is completed, set the temperature controller to enter the next constant temperature point, and repeat the process of steps 2)-5); 7) After the calibration of all temperature points is completed, form a calibration data report, remove the calibrated water content analyzer, and wait for it to cool down before calibrating the next instrument.

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