CN111662687A - Novel cooling medium for high-voltage direct-current transmission converter valve - Google Patents
Novel cooling medium for high-voltage direct-current transmission converter valve Download PDFInfo
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- CN111662687A CN111662687A CN202010448332.1A CN202010448332A CN111662687A CN 111662687 A CN111662687 A CN 111662687A CN 202010448332 A CN202010448332 A CN 202010448332A CN 111662687 A CN111662687 A CN 111662687A
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- converter valve
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- deionized water
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
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- Chemical Kinetics & Catalysis (AREA)
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- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
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Abstract
The invention discloses a novel cooling medium for a high-voltage direct-current transmission converter valve, which comprises the following components in parts by weight: 40-60 parts of trihydric alcohol, 10-15 parts of dispersion stabilizer, 3-5 parts of surfactant, 1-2 parts of corrosion inhibitor and 18-46 parts of deionized water. The cooling medium provided by the invention has the advantages of low preparation cost and simple use method, can improve the heat exchange efficiency of the converter valve, reduce accidents such as pipeline blockage, main water pipe breakdown, sealing ring leakage and the like of a cooling water system, and can effectively improve the reliability and safety of safe operation of the converter valve and even the whole direct current transmission project.
Description
Technical Field
The invention relates to the technical field of high-voltage direct-current transmission, in particular to a cooling medium for a high-voltage direct-current transmission converter valve.
Background
The converter valve is used as a core device of a high-voltage direct-current transmission system, the operating power is high, the rated current is up to 5000A, the temperature of thyristor components such as a thyristor and an anode reactor can be rapidly increased, a large amount of heat can be generated in the normal phase conversion process of the converter valve, if the heat cannot be effectively cooled in time, the safety and the reliability of direct-current transmission can be directly influenced, and even non-stop accidents of the direct-current transmission system can be caused.
Common cooling methods for the converter valve system include air cooling, liquid cooling, and the like, wherein the air cooling system is simple, but the required heat dissipation area is large, and the heat dissipation efficiency is low. The circulating water cooling system is widely applied, but has a series of problems of low cooling efficiency, uneven temperature distribution, electric corrosion and scaling, insulation failure caused by leakage and the like.
According to the domestic direct current transmission converter valve operation condition statistics, a converter valve cooling water system is a weak link of a converter valve, more than 25% of converter valve faults are caused by the cooling water system, and more than 66% of cooling water system faults are related to corrosion and scaling. Particularly, after the voltage-sharing electrode is scaled, the electrode sealing ring is corroded, the corroded sealing ring loses the sealing effect, internal cooling water is easy to leak, and the direct-current system can be stopped in severe cases. Secondly, the existing cooling technology needs a high-power fan or pump to drive working medium fluid to flow, and the system has high power consumption and high hardware maintenance cost.
Disclosure of Invention
The invention aims to provide a novel cooling medium for a high-voltage direct-current transmission converter valve, which aims to solve the problem that cooling water is taken as the cooling medium to easily cause scaling and provide a working medium capable of preventing corrosion and scale.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight:
40-60 parts of trihydric alcohol, 10-15 parts of dispersion stabilizer, 3-5 parts of surfactant, 1-2 parts of corrosion inhibitor and 18-46 parts of deionized water;
the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
Further, the triol comprises glycerol.
Further, the dispersion stabilizer includes 2-naphthalene sulfonic acid formaldehyde polymer sodium salt.
Further, the surfactant comprises polyisobutylene succinimide.
Further, the corrosion inhibitor comprises diethanolamine.
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight: 40-55 parts of trihydric alcohol, 10-14 parts of dispersion stabilizer, 3.5-5 parts of surfactant, 1.5-2 parts of corrosion inhibitor and 18-43 parts of deionized water; the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The novel cooling medium for the high-voltage direct-current transmission converter valve is simple in use method and low in economic cost, not only can improve the heat exchange efficiency of the converter valve, but also can reduce accidents such as pipeline blockage of a cooling water system, main pipeline breakdown, sealing ring leakage and the like, and effectively improves the reliability of safe operation of the converter valve and even the whole direct-current transmission project.
Detailed Description
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight:
40-60 parts of trihydric alcohol, 10-15 parts of dispersion stabilizer, 3-5 parts of surfactant, 1-2 parts of corrosion inhibitor and 18-46 parts of deionized water; the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
Wherein: the triol is glycerol, the dispersion stabilizer is 2-naphthalene sulfonic acid formaldehyde polymer sodium salt, the surfactant is polyisobutylene succinimide, and the corrosion inhibitor is diethanolamine.
The specific use method of the novel cooling medium for the high-voltage direct-current transmission converter valve comprises the following steps.
S1, calculating the mass of the components:
and calculating the required amount of each component of the cooling medium according to the volume of the whole cold water system in the converter valve.
S2, preparing a cooling medium:
and adding the triol calculated in the step S1 into a cooling system, and adding the deionized water, the dispersion stabilizer, the surfactant and the sustained-release agent calculated in the step S1 through a dosing device.
S3: and (3) circulating uniformly:
the circulation pump is started, and the cooling medium prepared in step S2 is circulated repeatedly in the cooling system for about 60 minutes.
The present invention will be described in further detail with reference to specific examples.
Example 1
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight:
40 parts of glycerol, 14 parts of 2-naphthalene sulfonic acid formaldehyde polymer sodium salt, 4.5 parts of polyisobutylene succinimide, 2 parts of diethanolamine and 46 parts of deionized water; the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
The specific use mode of the novel cooling medium for the high-voltage direct-current transmission converter valve prepared by the embodiment is as follows:
s1, calculating the mass of the components:
and calculating the required amount of each component of the cooling medium according to the volume of the whole cold water system in the converter valve.
S2, preparing a cooling medium:
adding 40 parts of glycerol into a cooling system, and adding 46 parts of deionized water, 14 parts of 2-naphthalenesulfonic acid-formaldehyde polymer sodium salt, 4.5 parts of polyisobutylene succinimide and 2 parts of diethanolamine through a dosing device.
S3, circulating uniformly:
the circulation pump is started, and the cooling medium prepared in step S2 is circulated repeatedly in the cooling system for 60 minutes.
Example 2
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight:
45 parts of glycerol, 12 parts of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt, 5 parts of polyisobutylene succinimide, 1.5 parts of diethanolamine and 34 parts of deionized water; the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
The specific use mode of the novel cooling medium for the high-voltage direct-current transmission converter valve prepared by the embodiment is as follows:
s1, calculating the mass of the components:
and calculating the required amount of each component of the cooling medium according to the volume of the whole cold water system in the converter valve.
S2, preparing a cooling medium:
adding 45 parts of glycerol into a cooling system, and adding 34 parts of deionized water, 12 parts of 2-naphthalenesulfonic acid-formaldehyde polymer sodium salt, 5 parts of polyisobutylene succinimide and 1.5 parts of diethanolamine through a dosing device.
S3, circulating uniformly:
the circulation pump is started, and the cooling medium prepared in step S2 is circulated repeatedly in the cooling system for 65 minutes.
Example 3
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight:
60 parts of glycerol, 10 parts of 2-naphthalene sulfonic acid formaldehyde polymer sodium salt, 4 parts of polyisobutylene succinimide, 1 part of diethanolamine and 30 parts of deionized water; the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
The specific use mode of the novel cooling medium for the high-voltage direct-current transmission converter valve prepared by the embodiment is as follows:
s1, calculating the mass of the components:
and calculating the required amount of each component of the cooling medium according to the volume of the whole cold water system in the converter valve.
S2, preparing a cooling medium:
60 parts of glycerol is added into a cooling system, and then 30 parts of deionized water, 10 parts of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt, 4 parts of polyisobutylene succinimide and 1 part of diethanolamine are added through a dosing device.
S3, circulating uniformly:
the circulation pump is started, and the cooling medium prepared in step S2 is circulated repeatedly in the cooling system for 63 minutes.
Example 4
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight:
50 parts of glycerol, 15 parts of 2-naphthalene sulfonic acid formaldehyde polymer sodium salt, 3 parts of polyisobutylene succinimide, 1.5 parts of diethanolamine and 18 parts of deionized water; the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
The specific use mode of the novel cooling medium for the high-voltage direct-current transmission converter valve prepared by the embodiment is as follows:
s1, calculating the mass of the components:
and calculating the required amount of each component of the cooling medium according to the volume of the whole cold water system in the converter valve.
S2, preparing a cooling medium:
adding 50 parts of glycerol into a cooling system, and adding 18 parts of deionized water, 15 parts of 2-naphthalenesulfonic acid-formaldehyde polymer sodium salt, 3 parts of polyisobutylene succinimide and 1.5 parts of diethanolamine through a dosing device.
S3, circulating uniformly:
the circulation pump is started, and the cooling medium prepared in step S2 is circulated repeatedly in the cooling system for 60 minutes.
Example 5
A novel cooling medium for a high-voltage direct-current transmission converter valve comprises the following components in parts by weight:
55 parts of glycerol, 13 parts of 2-naphthalene sulfonic acid formaldehyde polymer sodium salt, 3.5 parts of polyisobutylene succinimide, 1.3 parts of diethanolamine and 40 parts of deionized water; the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
The specific use mode of the novel cooling medium for the high-voltage direct-current transmission converter valve prepared by the embodiment is as follows:
s1, calculating the mass of the components:
and calculating the required amount of each component of the cooling medium according to the volume of the whole cold water system in the converter valve.
S2, preparing a cooling medium:
55 parts of glycerol is added into a cooling system, and then 40 parts of deionized water, 13 parts of 2-naphthalenesulfonic acid-formaldehyde polymer sodium salt, 3.5 parts of polyisobutylene succinimide and 1.3 parts of diethanolamine are added through a dosing device.
S3, circulating uniformly:
the circulation pump is started, and the cooling medium prepared in step S2 is circulated repeatedly in the cooling system for 65 minutes.
The novel cooling media for the high-voltage direct-current transmission converter valve prepared in the embodiments 1 to 5 are respectively applied to a converter valve cooling system, and the frequency of the occurrence of the problems of cooling system faults, corrosion and scaling is obviously reduced, so that the safety and reliability of direct-current transmission are improved.
Claims (6)
1. The novel cooling medium for the high-voltage direct-current transmission converter valve is characterized by comprising the following components in parts by weight:
40-60 parts of trihydric alcohol, 10-15 parts of dispersion stabilizer, 3-5 parts of surfactant, 1-2 parts of corrosion inhibitor and 18-46 parts of deionized water;
the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
2. The novel cooling medium for the HVDC converter valve according to claim 1, characterized in that: the trihydric alcohol is glycerol.
3. The novel cooling medium for the HVDC converter valve according to claim 1, characterized in that: the dispersion stabilizer is 2-naphthalene sulfonic acid formaldehyde polymer sodium salt.
4. The novel cooling medium for the HVDC converter valve according to claim 1, characterized in that: the surfactant is polyisobutylene succinimide.
5. The novel cooling medium for the HVDC converter valve according to claim 1, characterized in that: the corrosion inhibitor is diethanol amine.
6. The novel cooling medium for the HVDC converter valve according to claim 1, comprising the following components in parts by weight:
40-55 parts of trihydric alcohol, 10-14 parts of dispersion stabilizer, 3.5-5 parts of surfactant, 1.5-2 parts of corrosion inhibitor and 18-43 parts of deionized water;
the chemical agents are superior grade pure, and the deionized water is secondary deionized water or more grade pure water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010448332.1A CN111662687A (en) | 2020-05-25 | 2020-05-25 | Novel cooling medium for high-voltage direct-current transmission converter valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010448332.1A CN111662687A (en) | 2020-05-25 | 2020-05-25 | Novel cooling medium for high-voltage direct-current transmission converter valve |
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| CN111662687A true CN111662687A (en) | 2020-09-15 |
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| CN202010448332.1A Pending CN111662687A (en) | 2020-05-25 | 2020-05-25 | Novel cooling medium for high-voltage direct-current transmission converter valve |
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Application publication date: 20200915 |
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