Dynamic investigating method for performance of reverse osmosis antisludging agent

A technology for dynamic testing and antiscalants, applied in the direction of permeability/surface area analysis, measuring devices, instruments, etc., can solve the problem of inability to simulate continuous concentration, cannot evaluate the limit scale inhibition ability of antiscalants, and is not suitable for evaluating antiscalants, etc. problem, achieve the effect of saving manpower and material resources and shortening time

CN101000336AInactive Publication Date: 2007-07-18浙江凯锐环保股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2007-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for dynamically investigating property of antisludging agent used at reverse osmosis includes increasing concentration of solution in reverse osmosis original water tank continuously; recording water inlet operation pressure, pressure-drop of solution at flowing through membrane and solution temperature; monitoring solution ion concentration, solution pH value, turbidity and osmotic fluid water-output in flowing passage of time; enabling to use obtained data to quickly test out antisludging effect of said antisludging agent.
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Description

technical field

[0001] The invention relates to a dynamic test method for the performance of a reverse osmosis scale inhibitor, which uses a reverse osmosis device to test and evaluate the performance of the reverse osmosis scale inhibitor. The reverse osmosis permeate is partially refluxed for circulation and partially discharged to quickly and effectively obtain the ultimate scale inhibition ability of the scale inhibitor. The method of the invention provides a reliable basis for the development of new high-efficiency scale inhibitors and the field test of the scale inhibitors, and belongs to the technical field of water treatment in environmental engineering. Background technique

[0002] Reverse osmosis (RO) desalination technology is the most economical desalination technology for brackish water desalination and seawater desalination. It is also widely used in various fields such as pure water preparation, wastewater treatment, drinking water, beverage and chemical prod...

Examples

Embodiment 1

[0024] Two valves are installed at the permeate port of the reverse osmosis membrane: a return valve and a discharge valve, as shown in Figure 1, so that part of the permeate flows back to the original water tank through the return valve for circulation, and the other part is discharged through the discharge valve.

[0025] Install a regulating valve, a flow meter and a circulation reflux heat exchanger at the reverse osmosis membrane concentrate port, and make all the concentrate flow back to the raw water tank for circulation.

[0026] Install a bypass and bypass valve after the high-pressure pump to adjust flow and pressure. Recirculating heat exchanger and bypass heat exchanger are used to keep the raw water tank water temperature constant during operation

[0027] Weigh 61.47gCaCl 2 , 43.3g NaHCO 3 , 10.58 g NaNO 3 , 5.05gMgSO 4 Prepare a 106L solution in the original water tank, and adjust the pH of the solution to 7.0 with HCl. The LSI index (Langelier Saturation In...

Embodiment 2

[0034] Two valves are installed at the permeate port of the reverse osmosis membrane: a return valve and a discharge valve, as shown in Figure 1, so that part of the permeate flows back to the original water tank through the return valve for circulation, and the other part is discharged through the discharge valve.

[0035] Install a regulating valve, a flow meter and a circulation reflux heat exchanger at the reverse osmosis membrane concentrate port, and make all the concentrate flow back to the raw water tank for circulation.

[0036] Install a bypass and bypass valve after the high-pressure pump to adjust flow and pressure. Recirculating heat exchanger and bypass heat exchanger are used to keep the raw water tank water temperature constant during operation

[0037] Weigh 61.47gCaCl 2 , 43.3g NaHCO 3 , 10.58 g NaNO 3 , 5.05gMgSO 4 Prepare a 106L solution in the original water tank, and adjust the pH of the solution to 7.0 with HCl. The LSI index of the solution is 0.42,...

Embodiment 3

[0044] Two valves are installed at the permeate port of the reverse osmosis membrane: a return valve and a discharge valve, as shown in Figure 1, so that part of the permeate flows back to the original water tank through the return valve for circulation, and the other part is discharged through the discharge valve.

[0045] Install a regulating valve, a flow meter and a circulation reflux heat exchanger at the reverse osmosis membrane concentrate port, and make all the concentrate flow back to the raw water tank for circulation.

[0046] Install a bypass and bypass valve after the high-pressure pump to adjust flow and pressure. Recirculating heat exchanger and bypass heat exchanger are used to keep the raw water tank water temperature constant during operation

[0047] Weigh 61.47gCaCl 2 , 43.3g NaHCO 3 , 10.58 g NaNO 3 , 5.05gMgSO 4 Prepare a 106L solution in the original water tank, and adjust the pH of the solution to 7.0 with HCl. The LSI index of the solution is 0.42,...