Preparation method of ultralow-conductivity cooling liquid

Abstract

The invention discloses a preparation method of ultralow-conductivity cooling liquid. The preparation method comprises the following operation steps: S1, selecting a container; s2, proportioning of primary materials; step S3, carrying out charging treatment; step S4, filtering treatment; step S5, measuring and storing; the method comprises the following steps: S1, selecting one of plastic, ceramic or glass as a container material; s2, 40 to 70 parts of ultrapure water and 30 to 60 parts of electrolyte-free solute; the ultralow-conductivity cooling liquid has the beneficial effects that by adding the nonionic composite additive, the cooling liquid can be prevented from being affected by oxidation in long-time use, so that the stability of the ultralow-conductivity cooling liquid is ensured, and the electrolyte deposition phenomenon can be greatly reduced and the service life of the cooling liquid can be prolonged in the recycling process of the ultralow-conductivity cooling liquid; by adopting the nonionic composite additive, the contact between the cooling liquid and the metal surface can be improved, and the metal corrosion is inhibited, so that the heat transfer efficiency and the corrosion resistance of the cooling liquid are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of coolants, in particular to a method for preparing an ultra-low conductivity coolant. Background Art

[0002] Ultra-low conductivity coolant is a liquid with very low conductivity, usually used in applications where current conduction or dielectric performance needs to be reduced. In the cooling system of electric vehicle fuel cells, ultra-low conductivity coolant can reduce the presence of electrolytes, reduce the risk of electrical corrosion and electrolyte deposition, and improve the reliability and durability of the cooling system.

[0003] At present, most low-conductivity coolants can control the conductivity of the coolant by changing the amount of electrolyte, which prevents the corrosion and deposition of the coolant and improves the heat conduction capacity. This results in the electrolyte in the coolant being easily electrolyzed to form conductive ions after the coolant is circulated for a long time, thereby increasing the conductivity of the coolant and making the coolant easily corrode the cooling system. In view of this, in-depth research on the above issues led to the creation of this case. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and to design a method for preparing an ultra-low conductivity coolant to solve the problem in the prior art that the electrolyte inside the low conductivity coolant is easily electrolyzed to form conductive ions, thereby causing the conductivity of the coolant to increase.

[0005] The technical solution of the present invention to achieve the above-mentioned purpose is: a method for preparing an ultra-low conductivity coolant, comprising the following steps: step S1, container selection; step S2, initial material proportioning; step S3, material addition processing; step S4, filtration processing; step S5, measurement and storage;

[0006] Step S1: The selected container material must be one of plastic, ceramic or glass;

[0007] Step S2: 40-70 parts of ultrapure water, 30-60 parts of electrolyte-free solute, and 0-5 parts of non-ionic composite additive;

[0008] Step S3, gradually adding a non-electrolyte solute to the container, the amount of which can be adjusted according to the freezing point requirement of the desired coolant, to obtain a mixed solution A; stirring the mixed solution A using a stirring device to ensure that the non-electrolyte solute is fully dissolved in the ultrapure water, and adding the non-ionic composite additive to the mixed solution A during the stirring process, to finally obtain a mixed solution B;

[0009] Step S4: The mixed solution B is filtered to remove suspended matter.

[0010] Step S5: Measure the conductivity, pour the prepared ultra-low conductivity coolant into a container, and seal it for storage.

[0011] Preferably, the electrolyte-free solute injection rate added in step S3 is 0.04-0.08 m / s. 3 / s.

[0012] Preferably, the electrolyte-free solute in step S3 is one or more combinations of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol or glycerol.

[0013] Preferably, in step S3, the temperature of the stirring device is 20-25° C., the stirring speed is 16-26 r / min, and the stirring time is 6-9 min.

[0014] Preferably, the amount of the non-ionic composite additive added in step S2 can be added all at once.

[0015] Preferably, the container for holding the ultra-low conductivity coolant in S5 is a corrosion-resistant container to avoid adverse reactions between the coolant and the container.

[0016] Preferably, the container in step S1 is cleaned with ultrapure water, and the conductivity of the aqueous solution after cleaning is detected to be lower than 10 μS / cm, and then ultrapure water with a conductivity lower than 5 μS / cm is added to the container as a base solvent.

[0017] Preferably, the non-ionic composite additive in step S2 is one or more combinations of polyoxyethylene stearyl alcohol, polyoxyethylene octanol, polyoxyethylene fatty alcohol or polyoxyethylene stearate.

[0018] An ultra-low conductivity coolant is produced by utilizing the technical solution of the present invention. The present invention can prevent the coolant from being affected by oxidation during long-term use by adding a non-ionic composite additive, thereby ensuring the stability of the ultra-low conductivity coolant, so that during the cyclic use, the electrolyte deposition phenomenon can be greatly reduced and the service life of the coolant can be extended. The use of the non-ionic composite additive can improve the contact between the coolant and the metal surface and inhibit metal corrosion, thereby further improving the heat transfer efficiency and corrosion resistance of the coolant, so that the coolant can optimize and improve the heat dissipation efficiency of the cooling system when in use and has higher corrosion resistance. DETAILED DESCRIPTION

[0019] The following is a specific description of the present invention. A method for preparing an ultra-low conductivity coolant includes the following steps: step S1, container selection; step S2, initial material ratio; step S3, material addition process; step S4, filtration process; step S5, measurement and storage; step S1: the selected container material must be one of plastic, ceramic or glass; step S2: 40 to 70 parts of ultrapure water, 30 to 60 parts of electrolyte-free solute, and 0 to 5 parts of non-ionic composite additives; step S3, gradually adding electrolyte-free solute to the container, the amount added can be The mixed solution A is obtained by adjusting the freezing point requirement of the required coolant; the mixed solution A is stirred by a stirring device to ensure that the electrolyte-free solute is fully dissolved in the ultrapure water, and the non-ionic composite additive is added to the mixed solution A during the stirring process to finally obtain a mixed solution B; step S4: the mixed solution B is filtered to remove suspended matter; step S5: the conductivity is measured, and the prepared ultra-low conductivity coolant is poured into a container and sealed for storage; the electrolyte-free solute added in step S3 is injected at a rate of 0.04 to 0.08 m 3 / s, the electrolyte-free solute in step S3 is one or more combinations of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol or glycerol, the temperature of the stirring equipment in step S3 is 20-25°C, the stirring speed is 16-26r / min, and the stirring time is 6-9min. The amount of non-ionic composite additive added in step S2 can be added at one time. The container for holding the ultra-low conductivity coolant in S5 is a corrosion-resistant container to avoid adverse reactions between the coolant and the container. The container in step S1 is cleaned with ultrapure water, and the conductivity of the aqueous solution after cleaning is detected to be lower than 10μS / cm. Then, ultrapure water with a conductivity of lower than 5μS / cm is added to the container as a basic solvent. The non-ionic composite additive in step S2 is one or more combinations of polyoxyethylene stearyl alcohol, polyoxyethylene octanol, polyoxyethylene fatty alcohol or polyoxyethylene stearate.

[0020] The present embodiment is characterized in that it includes the following operation steps: step S1, container selection; step S2, initial material ratio; step S3, feeding process; step S4, filtration process; step S5, measurement and storage; step S1: the selected container material must be one of plastic, ceramic or glass; step S2: 40 to 70 parts of ultrapure water, 30 to 60 parts of electrolyte-free solute, and 0 to 5 parts of non-ionic composite additive; step S3, gradually adding electrolyte-free solute to the container, the amount added can be adjusted according to the freezing point requirement of the required coolant, to obtain a mixed solution A; using a stirring device to stir the mixed solution A to ensure that the electrolyte-free solute is fully dissolved in the ultrapure water, and adding the non-ionic composite additive to the mixed solution A during the stirring process, and finally obtaining a mixed solution. The invention discloses a method for preparing the ultra-low conductivity coolant. The method comprises the steps of: adding a non-ionic composite additive to prevent the coolant from being affected by oxidation during long-term use, thereby ensuring the stability of the ultra-low conductivity coolant, greatly reducing electrolyte deposition and extending the service life of the coolant during cyclic use, and using the non-ionic composite additive to improve the contact between the coolant and the metal surface and inhibit metal corrosion, thereby further improving the heat transfer efficiency and corrosion resistance of the coolant, so that the coolant can optimize and improve the heat dissipation efficiency of the cooling system and have higher corrosion resistance when in use.

[0021] By those skilled in the art, the steps in this case are operated sequentially. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0022] Example:

[0023] This case is a method for preparing an ultra-low conductivity coolant, comprising the following steps: step S1, container selection; step S2, initial material proportioning; step S3, material addition processing; step S4, filtration processing; step S5, measurement and storage;

[0024] Step S1: The selected container material must be one of plastic, ceramic or glass;

[0025] Step S2: 40-70 parts of ultrapure water, 30-60 parts of electrolyte-free solute, and 0-5 parts of non-ionic composite additive;

[0026] Step S3, gradually adding a non-electrolyte solute to the container, the amount of which can be adjusted according to the freezing point requirement of the desired coolant, to obtain a mixed solution A; stirring the mixed solution A using a stirring device to ensure that the non-electrolyte solute is fully dissolved in the ultrapure water, and adding the non-ionic composite additive to the mixed solution A during the stirring process, to finally obtain a mixed solution B;

[0027] Step S4: The mixed solution B is filtered to remove suspended matter.

[0028] Step S5: Measure the conductivity, pour the prepared ultra-low conductivity coolant into a container, and seal it for storage.

[0029] In the specific implementation process, it is important to point out that the injection rate of the electrolyte-free solute added in step S3 of this case is 0.04-0.08 m 3 / s;

[0030] Wherein, the electrolyte-free solute in step S3 is one or more combinations of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol or glycerol;

[0031] In step S3, the temperature of the stirring device is 20-25° C., the stirring speed is 16-26 r / min, and the stirring time is 6-9 min;

[0032] In the specific work, it should be particularly pointed out that the amount of the non-ionic composite additive added in step S2 in this case can be added all at once;

[0033] Among them, the container for S5 ultra-low conductivity coolant is a corrosion-resistant container to avoid adverse reactions between the coolant and the container;

[0034] The container in step S1 is cleaned with ultrapure water, and the conductivity of the aqueous solution after cleaning is detected to be less than 10 μS / cm, and then ultrapure water with a conductivity of less than 5 μS / cm is added to the container as a base solvent;

[0035] As a preferred embodiment, further, the non-ionic composite additive in step S2 is one or more combinations of polyoxyethylene stearyl alcohol, polyoxyethylene octanol, polyoxyethylene fatty alcohol or polyoxyethylene stearate.

[0036] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A method for preparing an ultra-low conductivity coolant, characterized in that: The method comprises the following steps: step S1, container selection; step S2, initial material proportioning; step S3, material addition processing; step S4, filtering processing; step S5, measurement and storage; Step S1: The selected container material must be one of plastic, ceramic or glass; Step S2: 40-70 parts of ultrapure water, 30-60 parts of electrolyte-free solute, and 0-5 parts of non-ionic composite additive; Step S3, gradually adding a non-electrolyte solute to the container, the amount of which can be adjusted according to the freezing point requirement of the desired coolant, to obtain a mixed solution A; stirring the mixed solution A using a stirring device to ensure that the non-electrolyte solute is fully dissolved in the ultrapure water, and adding the non-ionic composite additive to the mixed solution A during the stirring process, to finally obtain a mixed solution B; Step S4: The mixed solution B is filtered to remove suspended matter; Step S5: Measure the conductivity, pour the prepared ultra-low conductivity coolant into a container, and seal it for storage.

2. The method for preparing an ultra-low conductivity coolant according to claim 1, characterized in that: The injection rate of the electrolyte-free solute added in step S3 is 0.04 to 0.08 m³ / s.

3. The method for preparing an ultra-low conductivity coolant according to claim 1, characterized in that: The electrolyte-free solute in step S3 is one or more combinations of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol or glycerol.

4. The method for preparing an ultra-low conductivity coolant according to claim 1, characterized in that: In step S3, the temperature of the stirring device is 20-25° C., the stirring speed is 16-26 r / min, and the stirring time is 6-9 min.

5. The method for preparing an ultra-low conductivity coolant according to claim 1, characterized in that: The amount of the non-ionic composite additive added in step S2 can be added all at once.

6. The method for preparing an ultra-low conductivity coolant according to claim 1, characterized in that: The container S5 for holding the ultra-low conductivity coolant is a corrosion-resistant container to avoid adverse reactions between the coolant and the container.

7. The method for preparing an ultra-low conductivity coolant according to claim 1, characterized in that: The container in step S1 is cleaned with ultrapure water, and the conductivity of the aqueous solution after cleaning is detected to be lower than 10 μS / cm. Then, ultrapure water with a conductivity lower than 5 μS / cm is added to the container as a base solvent.

8. The method for preparing an ultra-low conductivity coolant according to claim 1, characterized in that: The non-ionic composite additive in step S2 is one or more combinations of polyoxyethylene stearyl alcohol, polyoxyethylene octanol, polyoxyethylene fatty alcohol or polyoxyethylene stearate.