Latex pump anti-demulsification performance test bench

Abstract

The invention discloses an anti-demulsification performance test bench for a latex pump. The test bench is mainly composed of the latex pump, a water tank, a booster pump, a stirring barrel, a sensor, a data acquisition system and the like. Wherein an inlet and an outlet of the latex pump are respectively connected with an inlet and an outlet of the water tank, an inlet and an outlet of the booster pump are respectively connected with bottom end openings of the stirring barrel and the water tank, and the data acquisition control system is respectively connected with the pressure gauge, the flowmeter, the torquemeter and the online viscosity sensor. The test bed can simulate the under-pressure inlet working condition of the latex pump during actual operation in a chemical plant, and the inlet pressure can be adjusted through the booster pump. The test bed can measure the external characteristics of the latex pump under the working condition of pressure, and can monitor and quantitatively analyze the demulsification condition of the latex pump in real time so as to measure the anti-demulsification performance of the latex pump.

Description

Technical Field

[0001] The invention belongs to the field of centrifugal pump testing equipment. Background Art

[0002] Latex pump is a centrifugal pump used to transport colloidal emulsion (latex). Latex is a polymer water dispersion, which is in a thermodynamic metastable state. Changes in external conditions will cause it to change from a stable state to an unstable state. Therefore, it has properties such as multiphase, high viscosity, and instability. It is sheared during the transportation process, which will cause the micelles to break. Therefore, demulsification and coagulation are very likely to occur during the transportation process of the latex pump. Demulsification and coagulation affect the quality of latex polymer products on the one hand, and cause blockage of the pump flow channel and the transportation pipeline on the other hand, thereby affecting production efficiency.

[0003] Therefore, in the design of latex pumps, it is necessary to examine the anti-emulsification effect of the latex pump, and also to examine its performance in terms of conveying efficiency and other aspects for comprehensive testing. Currently, there is no equipment in various fields that can be used to test the anti-emulsification performance of latex pumps. In order to improve the design level of latex pumps, providing a latex pump comprehensive performance test bench is an important technical problem that needs to be solved at present. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a latex pump anti-emulsification performance test bench, and the technical scheme adopted is as follows: A latex pump anti-emulsification performance test bench, comprising a latex pump 1, a torque meter 2, an online viscosity sensor 3, an outlet pressure gauge 4, an outlet valve 7, a flow meter 8, a water tank 10, a mixing barrel 13, a booster pump 14, an inlet valve 15, an inlet pressure gauge 16, a circulation pipeline, a booster pipeline and an online data acquisition system; The water tank 10 is a sealed structure, and a pressure relief valve 9 is provided on the top; the driving motor of the latex pump 1 is connected to the torque meter 2; The circulation pipeline is connected to the water tank 10, the inlet valve 15, the inlet pressure gauge 16 and the inlet of the latex pump 1 in sequence, and then returns to the water tank 10 through the outlet of the latex pump 1, the online viscosity sensor 3, the outlet pressure gauge 4, the outlet valve 7 and the flow meter 8 in sequence; The boosting pipeline is connected to the water tank 10 via the mixing barrel 13 and the boosting pump 14 in sequence; The online data acquisition system is respectively connected to the torque meter 2, the online viscosity sensor 3, the outlet pressure gauge 4, the flow meter 8 and the inlet pressure gauge 16 to collect and display the torque information of the driving motor of the latex pump 1, the latex viscosity at the outlet of the latex pump 1, the outlet pressure, the flow rate and the inlet pressure.

[0006] Preferably, the flow meter 8 is a turbine flow meter.

[0007] Preferably, a stirring device is installed in the stirring barrel 13, and the stirring device is composed of a stirring motor 11 and a stirring paddle 12 connected in series.

[0008] Preferably, the boost pump 14 is a diaphragm pump.

[0009] Preferably, a sampling port 5 is further provided at the outlet end of the latex pump 1, and the end of the sampling port 5 is connected to a filter screen 6, which is composed of a container and a screen, and the container is also marked with scale.

[0010] Preferably, the online data acquisition system is composed of a data processor 17 and a data display 18 , and the data processor 17 displays the acquired data through the data display 18 , thereby monitoring the state of latex transport in the latex pump 1 .

[0011] Beneficial effects of the present invention: The latex pump anti-emulsification performance test bench proposed by the present invention provides a high-pressure environment for the test environment by adding a pipeline design, and monitors the pressure of the latex pump inlet and outlet through a pressure gauge to make it reach the designed working condition. The demulsification rate is obtained by quantitative viscosity analysis, which is used as a test index for the anti-emulsification performance of the latex pump to evaluate its anti-emulsification performance.

[0012] Sampling and analysis can be directly carried out through the set discharge port to determine the actual demulsification situation, making the evaluation of the anti-demulsification performance test more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The device diagram of the present invention DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further explained and illustrated in the form of specific embodiments below.

[0016] In this embodiment, a latex pump anti-emulsification performance test bench includes a latex pump 1, a torque meter 2, an online viscosity sensor 3, an outlet pressure gauge 4, an outlet valve 7, a flow meter 8, a water tank 10, a mixing barrel 13, a booster pump 14, an inlet valve 15, an inlet pressure gauge 16, a circulation pipeline, a booster pipeline and an online data acquisition system; The water tank 10 is a sealed structure, and a pressure relief valve 9 is provided on the top; the driving motor of the latex pump 1 is connected to the torque meter 2; The circulation pipeline is connected to the water tank 10, the inlet valve 15, the inlet pressure gauge 16 and the inlet of the latex pump 1 in sequence, and then returns to the water tank 10 through the outlet of the latex pump 1, the online viscosity sensor 3, the outlet pressure gauge 4, the outlet valve 7 and the flow meter 8 in sequence; The booster pipeline is connected to the water tank 10 via the stirring barrel 13 and the booster pump 14 in sequence; a stirring device is installed in the stirring barrel 13, and the stirring device is composed of a stirring motor 11 and a stirring paddle 12 connected in series. The booster pump 14 is a diaphragm pump to avoid demulsification caused by shearing of the latex, which affects the accuracy of the test of the latex pump 1.

[0017] The online data acquisition system is connected to the torque meter 2, the online viscosity sensor 3, the outlet pressure gauge 4, the flow meter 8 and the inlet pressure gauge 16 respectively to collect the torque information of the driving motor of the latex pump 1, the latex viscosity, the outlet pressure, the flow rate and the inlet pressure of the outlet of the latex pump 1. In this embodiment, the flow meter 8 is a turbine flow meter.

[0018] The online data acquisition system is composed of a data processor 17 and a data display 18 . The data processor 17 displays the acquired data through the data display 18 , thereby monitoring the state of latex transport in the latex pump 1 .

[0019] In this embodiment, a sampling port 5 is further provided at the outlet end of the latex pump 1, and the end of the sampling port 5 is connected to a filter screen 6, which is composed of a container and a screen, and the container is marked with scales; during the test, the sampling port 5 can be opened at any time to release a certain volume of latex medium through the filter screen 6, and the breakage of the latex can be judged by observing the filtrate of the screen, and the filtrate of the screen can be weighed to achieve quantitative analysis of the demulsification of the latex.

[0020] Working principle: Before the test begins, pour the latex into the stirring barrel 13, turn on the stirring motor 11, and use the stirring paddle 12 to slowly stir the latex to stir the latex evenly. After stirring, turn on the booster pump 14 to transport the latex to the water tank 10. During the pumping process using the booster pump 14, the inlet valve 15, the outlet valve 7 and the pressure relief valve 9 must all be opened to allow the latex to fill the entire test pipeline. When the latex fills the entire test pipeline, a certain amount of latex should be left in the stirring barrel 13 for the boosting operation of the booster pump 14.

[0021] When the latex fills the entire test pipeline, close the pressure relief valve 9, start the latex pump 1, and monitor the flow rate, pressure and other parameters of the latex pump through the data display 18. Adjust the opening of the outlet valve 7 to make the operating condition of the latex pump 1 reach the rated condition. When the pump inlet pressure displayed by the data display 18 is lower than the test design pressure, start the booster pump 14 for boosting, and when the pressure reaches the test design pressure, the booster pump 14 is closed.

[0022] When the impeller design of the latex pump is unreasonable, the impeller will exert a strong mechanical force on the latex and cause demulsification, thereby causing the latex viscosity to change. The demulsification rate and viscosity of the latex show a corresponding relationship. The demulsification rate-viscosity correspondence table is obtained in advance through experiments. During the test bench test, the table is looked up by the latex viscosity and converted into real-time demulsification rate data of the latex, so that the demulsification rate and demulsification status of the latex in the system can be quantitatively analyzed in real time.

[0023] The demulsification rate of the latex in the present invention is the mass fraction of the coagulant formed by demulsification to the total solids in the latex. W e The value is expressed as a percentage (%) and is calculated according to the formula: Where: m e The solidified substance formed, in grams (g); m The mass of latex sample, in grams (g); TSC Total solid content in latex sample, expressed as mass fraction (%); The calculation result is the average of the two measurement results and is expressed to three decimal places.

Claims

1. A latex pump anti-emulsification performance test bench, characterized in that: The test bench comprises: a latex pump (1), a torque meter (2), an online viscosity sensor (3), an outlet pressure gauge (4), an outlet valve (7), a flow meter (8), a water tank (10), a mixing barrel (13), a booster pump (14), an inlet valve (15), an inlet pressure gauge (16), a circulation pipeline, a booster pipeline and an online data acquisition system; The water tank (10) is a sealed structure, and a pressure relief valve (9) is provided on the top; the driving motor of the latex pump (1) is connected to the torque meter (2); The circulation pipeline is connected to the water tank (10), the inlet valve (15), the inlet pressure gauge (16) and the inlet of the latex pump (1) in sequence, and then returns to the water tank (10) through the outlet of the latex pump (1), the online viscosity sensor (3), the outlet pressure gauge (4), the outlet valve (7) and the flow meter (8) in sequence; The boosting pipeline is connected to the water tank (10) via the stirring barrel (13) and the boosting pump (14) in sequence; The online data acquisition system is respectively connected to the torque meter (2), the online viscosity sensor (3), the outlet pressure gauge (4), the flow meter (8) and the inlet pressure gauge (16) to acquire and display the torque information of the driving motor of the latex pump (1), the latex viscosity at the outlet of the latex pump (1), the outlet pressure, the flow rate and the inlet pressure.

2. The latex pump anti-emulsification performance test bench according to claim 1, characterized in that: The flow meter (8) is a turbine flow meter.

3. The latex pump anti-emulsification performance test bench according to claim 1, characterized in that: A stirring device is installed in the stirring barrel (13), and the stirring device is composed of a stirring motor (11) and a stirring paddle (12) connected in series.

4. The latex pump anti-emulsification performance test bench according to claim 1, characterized in that: The booster pump (14) is a diaphragm pump.

5. The latex pump anti-emulsification performance test bench according to claim 1, characterized in that: A sampling port (5) is also provided at the outlet end of the latex pump (1), and the end of the sampling port (5) is connected to a filter screen (6). The filter screen (6) is composed of a container and a screen, and the container is also marked with scale.

6. The latex pump anti-emulsification performance test bench according to claim 1, characterized in that: The online data acquisition system is composed of a data processor (17) and a data display (18). The data processor (17) displays the acquired data through the data display (18), thereby monitoring the state of latex transported in the latex pump (1).

Images