阅读说明：本技术 一种用于干熄焦凝汽器在线清洗的药液、制备方法以及在线清洗的方法 (A method of for the medical fluid of dry coke quenching condenser on-line cleaning, preparation method and on-line cleaning ) 是由 张光辉 李正清 唐德江 陈伟 肖发兵 李兴瑜 徐苇 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种用于干熄焦凝汽器在线清洗的药液、制备方法以及在线清洗的方法,属于凝汽器在线清洗技术领域。其药液包括：按重量份计,混合酸40份-70份、缓蚀剂10份-25份、渗透剂10份-20份、消泡剂10份-15份、螯合剂5份-10份和水30-50份；其中,混合酸包括：硫酸、氨基磺酸和2-羧乙基磷酸；螯合剂包括：羟乙基硫代丁二酸和二乙基三胺五乙酸；渗透剂为：琥珀酸脂磺酸钠；消泡剂为聚氧乙烯辛烷基苯酚醚。本发明的用于干熄焦凝汽器在线清洗的药液溶垢能力强,清洗效果好,安全环保对环境无污染。本发明的在线清洗方法时间短、成本低,除垢率大于85％,清洗效果显著。(The invention discloses a kind of methods for the medical fluid of dry coke quenching condenser on-line cleaning, preparation method and on-line cleaning, belong to condenser on-line cleaning technical field.Its medical fluid includes: 40 parts -70 parts of mixed acid, 10 parts -25 parts of corrosion inhibiter, 10 parts -20 parts of bleeding agent, 10 parts -15 parts of defoaming agent, 5 parts -10 parts of chelating agent and 30-50 parts of water by weight；Wherein, mixed acid includes: sulfuric acid, sulfamic acid and 2- carboxyethyl phosphoric acid；Chelating agent includes: hydroxyethylthio succinic acid and diethyl pentetic acid；Bleeding agent are as follows: amber acid ester sodium sulfonate；Defoaming agent is polyoxyethylene octane alkylphenol ether.Medical fluid solubility for scale for dry coke quenching condenser on-line cleaning of the invention is strong, and cleaning effect is good, safety and environmental protection no pollution to the environment.The on-line cleaning method time of the invention is short, at low cost, and descaling rate is greater than 85%, and cleaning effect is significant.)

1. a kind of medical fluid for dry coke quenching condenser on-line cleaning, characterized in that it comprises: by weight, mixed acid 40 parts -70 parts, 10 parts -25 parts of corrosion inhibiter, 10 parts -20 parts of bleeding agent, 10 parts -15 parts of defoaming agent, 5 parts -10 parts of chelating agent and water 30-50 parts；

Wherein, the mixed acid includes: sulfuric acid, sulfamic acid and 2- carboxyethyl phosphoric acid, and respective mass ratio is 1:(0.8- 1): (0.6-0.8)；

The chelating agent includes: hydroxyethylthio succinic acid and diethyl pentetic acid, mass ratio 1:(0.1-0.3)；

The bleeding agent are as follows: amber acid ester sodium sulfonate；The defoaming agent is polyoxyethylene octane alkylphenol ether.

2. the medical fluid according to claim 1 for dry coke quenching condenser on-line cleaning, characterized in that it comprises: press Parts by weight meter, 50 parts -60 parts of mixed acid, 15 parts -20 parts of corrosion inhibiter, 10 parts -20 parts of bleeding agent, 10 parts -15 parts of defoaming agent, sterilization 5 parts -10 parts and water 30-50 parts of algicide.

3. -2 described in any item medical fluids for dry coke quenching condenser on-line cleaning according to claim 1, which is characterized in that institute Stating corrosion inhibiter includes: methenamine, methyl benzotriazazole, ammonium thiocyanate and 1,3- diamino thiocarbamide, respective mass ratio For 1:(0.5-0.8): (0.75-0.9): (0.5-1).

4. the preparation method of the described in any item medical fluids for dry coke quenching condenser on-line cleaning of claim 1-3, feature It is, comprising the following steps:

10min-30min is mixed in above-mentioned mixed acid and water at normal temperature, infiltration is then sequentially added under stirring 15min-25min is mixed in saturating agent and chelating agent, is eventually adding corrosion inhibiter and defoaming agent continues to stir 20min-30min, system It must be used for the medical fluid of dry coke quenching condenser on-line cleaning.

5. a kind of method of dry coke quenching condenser on-line cleaning, which is characterized in that be used for dry coke quenching using as claimed in claim 4 The medical fluid of condenser on-line cleaning, comprising the following steps:

(1) after sterilization slimes dispersant agent being added with 150mg/L-200mg/L in the condenser circulating water that water temperature is 50 DEG C -60 DEG C Circular flow 3h-5h；

(2) keeping step (1) recirculated water water temperature is 50 DEG C -60 DEG C, to follow in bad water added with 200mg/L-300mg/L it is above-mentioned Medicament circular flow 5h-10h；Wherein, real-time monitoring is followed bad water pH and is adjusted using organic acid or inorganic acid and maintain recirculated water PH value in 4-5；

(3) after circulation terminates to step (2), it is first passed through after alkali cleaning neutralizer and is passed through ejected wash water and follows bad cleaning.

6. the method for dry coke quenching condenser on-line cleaning according to claim 5, which is characterized in that killing in step (1) Bacterium slimes dispersant agent includes: -3- 30 parts -50 parts of amino propionamides of 2,2-, bis- bromo, 2 parts -5 parts of lauramide and 20 parts of water - 40 parts.

Technical field

The present invention relates to condenser on-line cleaning technical fields, and in particular to one kind is used for dry coke quenching condenser on-line cleaning Medical fluid, preparation method and on-line cleaning method.

Background technique

In dry coke quenching production system, the condensing equipment in generating set is important heat-exchange apparatus, effect be by Gas turbine exhaust gas is condensed into a kind of heat exchanger of water, and forms and keep required vacuum.Condensing equipment includes condenser, takes out Gas device, condensate pump and water circulating pump, wherein condenser is most important component part.Condenser is in entire thermodynamic cycle Cold source, main function are to form high vacuum in turbine discharge mouth, so that steam is expanded into minimum pressure in steam turbine, increase Usable enthalpy drop of the steam in steam turbine improves thermal efficiency of cycle；The steam discharge of steam turbine is condensed into water, boiler is sent back to again and follows Ring；Collect various hydrophobic, reduction loss of steam and water.In recent years, as dry coke quenching produces and uses the deterioration of raw water quality and recycles cold But the raising of water concentration rate, although taking anti-scaling measures, Condenser Stainless Steel Tube scale formation frequently occurs.Condenser The main harm of fouling is to reduce the efficiency of unit.After condenser stainless steel fouling, condenser vacuum is reduced, unit efficiency drop Low, coal consumption increases, and when stainless steel tube seriously corroded will lead to leakage, causes boiler corrosion, fouling or even booster.

Stop cleaning is needed after usual condenser tube fouling, i.e., is repaired the time using large and small, separately adds acid cleaning tank, acid picking pump, Chemical cleaning is carried out to stainless steel tube；Cleaning solution is mostly that inorganic acid adds corrosion inhibiter to form, exist cleaning not enough thoroughly, it is time-consuming compared with Long, the unconspicuous problem of cleaning effect.Chemical cleaning under this shutdown status, required temporary system equipment bulky complex, disappears Consume a large amount of human and material resources and financial resources.In addition, because economic loss caused by stop cleaning generates electricity less is also bigger.If met To peak of power consumption, unit cannot stop transport, and fouling cannot remove in time, can bring great harm to the safe operation of unit.

Summary of the invention

The object of the present invention is to provide a kind of for the medical fluid of dry coke quenching condenser on-line cleaning, preparation method and online The method of cleaning, it is unobvious to solve existing condenser cleaning medical fluid cleaning effect, and condenser on-line cleaning is inconvenient asks Topic.

The technical scheme to solve the above technical problems is that

A kind of medical fluid for dry coke quenching condenser on-line cleaning comprising: by weight, 40 parts -70 parts of mixed acid, 10 parts -25 parts of corrosion inhibiter, 10 parts -20 parts of bleeding agent, 10 parts -15 parts of defoaming agent, 5 parts -10 parts of chelating agent and 30-50 parts of water；

Wherein, mixed acid includes: sulfuric acid, sulfamic acid and 2- carboxyethyl phosphoric acid, and respective mass ratio is 1:(0.8- 1): (0.6-0.8)；

Chelating agent includes: hydroxyethylthio succinic acid and diethyl pentetic acid, and respective mass ratio is 1:(0.1- 0.3)；

Bleeding agent are as follows: amber acid ester sodium sulfonate；Defoaming agent is polyoxyethylene octane alkylphenol ether.

Further, in preferred embodiments of the present invention, the above-mentioned medical fluid for dry coke quenching condenser on-line cleaning, It include: 50 parts -60 parts of mixed acid, 15 parts -20 parts of corrosion inhibiter, 10 parts -20 parts of bleeding agent, 10 part -15 of defoaming agent by weight Part, 5 parts -10 parts of Biocidal algae-killing agent and 30-50 parts of water.

Further, in preferred embodiments of the present invention, above-mentioned corrosion inhibiter includes: methenamine, three nitrogen of methyl benzo Azoles, ammonium thiocyanate and 1,3- diamino thiocarbamide, respective mass ratio are 1:(0.5-0.8): (0.75-0.9): (0.5-1).

The preparation method of the above-mentioned medical fluid for dry coke quenching condenser on-line cleaning, comprising the following steps:

10min-30min is mixed in above-mentioned mixed acid and water at normal temperature, is then successively added under stirring Enter bleeding agent and 15min-25min is mixed in chelating agent, is eventually adding corrosion inhibiter and defoaming agent continues to stir 20min- The medical fluid for dry coke quenching condenser on-line cleaning is made in 30min.

A kind of method of dry coke quenching condenser on-line cleaning, using the medical fluid of above-mentioned dry coke quenching condenser on-line cleaning, The following steps are included:

(1) sterilization slimes dispersant is added with 150mg/L-200mg/L in the condenser circulating water that water temperature is 50 DEG C -60 DEG C Circular flow 3h-5h after agent；

(2) keeping step (1) recirculated water water temperature is 50 DEG C -60 DEG C, to follow in bad water added with 200-300mg/L it is above-mentioned Medicament circular flow 5h-10h；Wherein, real-time monitoring is followed bad water pH and is adjusted using organic acid or inorganic acid and maintain recirculated water PH value in 4-5；

(3) after circulation terminates to step (2), it is first passed through after alkali cleaning neutralizer and is passed through ejected wash water and follows bad cleaning.

In the present invention, inorganic acid includes dilute sulfuric acid, and organic acid includes: hydroxyacetic acid, sulfamic acid or citric acid.

Further, in preferred embodiments of the present invention, the sterilization slimes dispersant agent in above-mentioned steps (1) includes: 2, - 3- 30 parts -50 parts of amino propionamides of bis- bromo of 2-, 2 parts -5 parts of lauramide and 20 parts -40 parts of water.

The invention has the following advantages:

1, condenser of the invention uses stainless steel heat exchange tube, therefore the present invention uses the mixing of inorganic acid and organic acid Acid, wherein there is sulfamic acid acidity to have very high dissolubility to dirt by force, precipitating will not be generated in cleaning solution, to metal Corrosivity is smaller.2- carboxyethyl phosphoric acid is with corrosivity is low, should not fire, is odorless, toxicity is low, Biodegradable is strong, high water solubility The features such as, there is preferable solvability to the dirt of alkalinous metal class, it is more violent with the compound effects such as calcium, magnesium, it is suitble to use In cleaning calcium, magnesium salts dirt.Sulfuric acid, sulfamic acid and 2- carboxyethyl phosphoric acid are used in compounding, operative temperature is all 50 DEG C -60 DEG C, operative temperature range is consistent, can pass through the good synergistic function between each component under identical operative temperature, improve clear Effect is washed, scavenging period is shortened.

2, the present invention uses hydroxyethylthio succinic acid for main sequestering agent, and chelating agent answers supplemented by diethyl pentetic acid Chelating agent is closed, wherein hydroxyethylthio succinic acid is a kind of excellent calcium and magnesium ion chelating agent, and ethoxy sulphur is added in a medicament It effectively prevent the calcium salt washed down, magnesium salts and silicide to deposit again in metal surface for succinic acid.Five second of diethyl triamine Acid is used as polyaminopolycarboxylic group quasi-chelate compound, can assist main sequestering agent under its acid and chelating collective effect, in acid item Can be synergistic under part, enhance its chelation to calcium and magnesium ion, improves its treatment effect.

3, methenamine, methyl benzotriazazole, ammonium thiocyanate and 1,3- diamino sulphur in the corrosion inhibiter that the present invention uses Urea all has the advantages of good stability, resistance to oxidation, chlorine-resistant property, is dispersed into dirt with the use of can play simultaneously in a medicament Ion and inhibition metal erosion.And ammonium thiocyanate therein is one of coke oven gas purification product, is originated from dry coke quenching production, it is former Expect that source is convenient and sufficient.

4, in on-line cleaning method of the invention, sterilization slimes dispersant agent is added, the microorganism of pipeline and glutinous mud is carried out first Processing is not allowed also wherein 2, the 2- -3- amino propionamides of bis- bromos used are that oxidative bactericide can reduce processing cost Easily cause environmental pollution；The lauramide of use has the characteristics that bactericidal effect is prominent, slimes dispersant is thorough, use cost is low, First processing by sterilizing slimes dispersant agent provides advantage for subsequent on-line cleaning,

5, the medical fluid solubility for scale for dry coke quenching condenser on-line cleaning of the invention is strong, and cleaning effect is good, safety collar Protect no pollution to the environment.The on-line cleaning method time of the invention is short, at low cost, and descaling rate is greater than 85%, and cleaning effect is significant.

Specific embodiment

Principles and features of the present invention are described with reference to embodiments, the given examples are served only to explain the present invention, It is not intended to limit the scope of the present invention.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer suggests Condition carries out.Reagents or instruments used without specified manufacturer is the conventional products that can be obtained by commercially available purchase.