A method for measuring the performance of reverse osmosis antiscalant
A technology of scale inhibitor and reverse osmosis, which is applied in the field of measuring the performance of reverse osmosis scale inhibitor, can solve the problems of cumbersome operation and long experiment period, and achieve the effects of high detection efficiency, short experiment period, convenient performance and quality level
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Embodiment 1
[0067] This example is used to illustrate how to judge the highest reverse osmosis recovery rate or supersaturation degree that can be achieved under the premise of knowing the optimal dosing amount of the antiscalant sample.
[0068] Test sample: antiscalant JC-20, purchased from a reverse osmosis antiscalant manufacturer.
[0069] According to the recommendation of the antiscalant manufacturer, the optimal dosing amount of the antiscalant JC-20 is 50ppm. Under this dosing amount, five concentrated water gradients are set according to the different recovery rates of the reverse osmosis operation. The TDS concentration on the concentrated water side Respectively 54150mg / L, 61869mg / L, 72162mg / L, 86570mg / L, 108195mg / L, using Dow reverse osmosis design software ROSA design ( Figure 1-Figure 5 ), the design results are shown in Table 4 below, which contains 5 gradients. According to the recovery rate conditions of reverse osmosis operation, the concentrated water quality will als...
Embodiment 2
[0074] This example is used to illustrate how to judge the optimal dosing amount of the antiscalant sample under the specific reverse osmosis operation recovery rate.
[0075] Test samples: antiscalant JC-20, the recommended dosage is 40-60ppm, purchased from a scale inhibitor manufacturer; antiscalant JW-01, the recommended dosage is 30-40ppm, purchased from a scale inhibitor manufacturer .
[0076] The design recovery rate of reverse osmosis is 60%, and the design test scheme is shown in Table 5.
[0077] table 5
[0078]
[0079] When the dosage of antiscalant JW-01 was 30ppm, 35ppm and 40ppm, crystals precipitated within 6 hours. When the dosage of antiscalant JW-20 was 40ppm, crystals precipitated within 5 hours. When it is 50ppm and 60ppm, there is always no crystal precipitation. Considering the operating cost of the reverse osmosis equipment, in the case of a recovery rate of 60%, choose the dosage of antiscalant of 50ppm.
Embodiment 3
[0081] This example is used to illustrate how to measure the qualification of the antiscalant sample under the specific recovery rate of reverse osmosis operation.
[0082] Test sample: antiscalant WRP593, purchased from a certain antiscalant manufacturer.
[0083] In the process of using reverse osmosis equipment to produce new water in a water plant, it is necessary to test the qualification of scale inhibitor WRP593.
[0084] The specific measurement method is: after inputting the raw water quality in the design software, such as Figure 6 As shown, the system is set up, the recovery rate is 60%, and the water quality of concentrated water is obtained as Figure 7 . According to the above calculation method, Table 6 can be obtained. According to the calculation results in Table 6, the A / B groups of simulated water samples were prepared respectively, and different batches of antiscalant WRP593 were added to each test group according to the optimal dosage of 30ppm. Stir at...
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