77 results about "Chemical cleaning" patented technology

The utility model relates to a kind of reverse osmosis thick water emission reduction and reuse system, belong to water treatment technical field.The system includes the thick water reverse osmosis booster pump, ultra-low pressure thick water reverse osmosis device connected in turn, reuse water tank, wherein, reverse osmosis thick water is treated by preposed reverse osmosis device, and after being added hydrochloric acid and scale inhibitor by hydrochloric acid dosing device, scale inhibitor dosing device to reverse osmosis thick water, it is entered ultra-low pressure thick water reverse osmosis device by thick water reverse osmosis booster pump after treatment;The thick water generated after ultra-low pressure thick water reverse osmosis device treatment is directly discharged, and water production enters reuse water tank, part is reused, another part is washed to ultra-low pressure thick water reverse osmosis device by flushing water pump;While ultra-low pressure thick water reverse osmosis device is connected chemical cleaning device.The utility model has the advantages of flexible system operation mode, simple operation, high degree of automation, efficient energy saving, low operating cost, stable and reliable etc..

This invention relates to the field of semiconductor cleaning technology and discloses a cleaning agent for semiconductor silicon wafers and its preparation method. This cleaning agent aims to solve the problem that traditional strong alkaline or phosphate-based wet electronic chemical cleaning agents easily corrode the silicon wafer surface, damage the crystal lattice, and thus affect electrical performance. This cleaning agent utilizes a multi-component synergistic effect: a surfactant system composed of alkyl glycosides and sophorolipids enhances particle wetting and stripping; lipase and silicon-pharmacoprotein precisely catalyze the removal of specific contaminants; sodium gluconate complexes metal ions; gelatin-polyacrylamide copolymer disperses contaminants to prevent secondary contamination; glycerol and trehalose maintain enzyme activity; and ultrapure water ensures the system meets the electronic-grade purity standards for wet electronic chemicals. Overall, it avoids strong alkaline corrosion, maintains the integrity of the silicon wafer lattice, and improves particle removal efficiency, meeting the high standards required for wet electronic chemical-based silicon wafer cleaning agents in advanced processes.

The utility model belongs to ground robot technical field especially a factory ground robot with self -cleaning track structure aims at the track of traditional factory ground robot of current easy to be attached to impurity, manual dismounting cleaning maintenance cost is high, influence operation, through scraper cleaning existence blind angle, it is difficult to clean sticky dirt, heavy load is easy to wear and tear and stagnate the problem, present and propose following scheme, including ground robot body, the both sides of ground robot body are rotatably connected with track, in the utility model, through the cleaning box and nylon brush that set up in the both sides of ground robot body, realize full -automatic cleaning, reduce maintenance cost, dust collection subassembly passes through passageway, dust extraction device and the dust collection of connecting pipe with filter screen collect dust, avoid secondary pollution, keep the environment clean and prolong the life, the cleaning assembly is through water pump, cleaning pipe and shower nozzle group flush track, cooperate brush and remove stubborn dirt, realize physical to chemical cleaning upgrade, reduce mechanical failure.

This invention provides an alcohol amine polyether composition, its preparation method, and its applications. By pre-adding specific antioxidants and stabilizers, combined with a special post-treatment purification process, this invention effectively improves the anti-aging properties and color stability of the alcohol amine polyether. The resulting alcohol amine polyether composition has an initial color number <7 (Gardner color), and exhibits excellent anti-aging properties. Color testing results after one week in a 50-55℃ oven and three months at room temperature show a color number of approximately 5-6 (Gardner color), with almost no darkening. It can be widely used as a main component in cleaning agents in the field of electronic chemical cleaning.

The application discloses a chemical cleaning liquid level control system and method for a power station boiler, which comprises a water storage tank, a differential pressure liquid level transmitter, a liquid level interlocking controller, a drainage electric valve, a cleaning water inlet valve, a cleaning backwater pipeline, a cleaning water inlet pipeline and a circulating cleaning system; the water storage tank, the cleaning backwater pipeline, the circulating cleaning system and the cleaning water inlet pipeline are sequentially connected to form a circulating pipeline; the cleaning backwater pipeline is further connected to a drainage system at a water outlet end; the liquid level steam side communication pipe and the liquid level water side communication pipe of the water storage tank are both connected to the differential pressure liquid level transmitter; the drainage electric valve is arranged at the water outlet end of the cleaning backwater pipeline and is connected to the drainage system; and the input end of the liquid level interlocking controller is electrically connected to the differential pressure liquid level transmitter, and the output end is connected to the drainage electric valve. The application solves the problems of high equipment failure rate, high human error rate, unreliable control measures and high labor intensity of personnel in the conventional chemical cleaning liquid level control technology.

The utility model discloses a kind of molybdenum tray high-efficiency chemical cleaning device based on ultrasonic technology, including main body mechanism, its inner cavity is equipped with the clamping mechanism for clamping molybdenum tray and the spray mechanism for flushing molybdenum tray, the top of main body mechanism is equipped with the support mechanism that can provide installation base for clamping mechanism, driving mechanism for being equipped with on support mechanism for rotating molybdenum tray with clamping mechanism is driven;By the cooperation of clamping mechanism, support mechanism, driving mechanism and displacement mechanism, molybdenum tray can be clamped in main body mechanism and rotate at uniform speed, the contact area between molybdenum tray and main body mechanism can be reduced, while reducing compound residual rate, increase the contact area between chemical medicine water, improve compound stripping efficiency, in turn help to shorten cleaning time;Ultrasonic cleaning and pure water flushing to molybdenum tray can be realized, so that molybdenum tray is cleaned more cleanly.

The present application relates to the technical field of metal material chemical cleaning, and discloses an environment-friendly cleaning agent for degumming of a metal surface, comprising: tert-butyl hydrogen peroxide, diethylene glycol monobutyl ether, polyoxyethylene polyoxypropylene copolymer with a multi-branched structure, and deionized water, wherein the diethylene glycol monobutyl ether forms an associated structure with the tert-butyl hydrogen peroxide through hydrogen bonds; after the cleaning agent penetrates into the gap between the oxide film and the gum layer on the metal surface, the Lewis acid center of the oxide film competitively cuts the hydrogen bonds, induces in-situ decomposition of the tert-butyl hydrogen peroxide to release oxygen, and the interface pressure generated by the oxygen converts chemical energy into normal mechanical work, realizes whole peeling of the gum layer from the interface root, suppresses diffusion loss of the solvent in the gum layer body phase, and shortens the cleaning period without damaging the metal matrix.

This invention discloses an application device and method for high-efficiency, anti-fouling MBR membrane modules in wastewater treatment. The MBR tank of this device employs special materials and structural design, resulting in a reasonable hydraulic retention time. The MBR membrane module is made of modified PVDF, with precisely controlled membrane pore size and reinforced ribs and a unique encapsulation structure. Combined with an aeration device featuring a central aeration nozzle, it effectively solves problems such as membrane breakage, entanglement, and aeration dead zones. It is also equipped with comprehensive supporting equipment, and automated operation and precise control are achieved through an online monitoring and control system. The application method covers steps including biological wastewater treatment, membrane filtration, air scrubbing, backwashing, and chemical cleaning, and maintenance and optimization are performed based on water quality and equipment conditions. This invention significantly improves wastewater treatment efficiency and water quality stability, reduces membrane fouling and operating costs, extends membrane module lifespan, is highly adaptable, and offers intelligent and simple operation, providing an innovative and efficient solution for wastewater treatment.

The utility model relates to the technical field of condenser discloses a water chilling unit condenser visible inspection end cover, including the cover body of layout in the condenser end, is equipped with the observation port for observing the inside of condenser on the cover body, is equipped with the sight glass made of toughened glass on the observation port, and the sight glass is connected with the cover body through the flange, and forms sealed closure to the observation port. Through being equipped with the observation port on the cover body, being equipped with the sight glass on the observation port, whether the welding slag, foreign matter in the condenser after the installation is checked, and the structure situation of water chilling unit condenser in normal operation, the scale removal situation and water quality condition etc. during chemical cleaning are observed, to avoid the damage of water chilling unit.

This invention discloses a self-cleaning pretreatment system for a water analyzer, comprising a housing and a self-cleaning assembly. The housing contains a filter module within its filter chamber. The self-cleaning assembly includes a multi-way valve group connected to a cleaning chamber and a discharge chamber. The multi-way valve group is connected to a backwash water pump, a compressed air source module, and a dosing pump. The self-cleaning module also includes a discharge valve connected to the cleaning chamber and the discharge chamber. This invention employs pulsed gas-liquid backwashing combined with chemical cleaning, significantly improving the cleaning effect on the filter element compared to traditional methods and extending its service life. During operation, the equipment uses a PLC controller for fully automated control, eliminating the need for manual intervention. Remote monitoring and operation are possible, reducing maintenance costs. Compared to traditional methods, it saves on reagent consumption and reduces wastewater discharge.

The utility model relates to the technical field of alumina plate processing, especially to an alumina plate surface treatment device, which realizes an automatic cleaning process, reduces manual intervention and improves production efficiency through the setting of the device, and has the dual action of physical brushing and chemical cleaning liquid to improve the decontamination capacity; the rotary brush enhances the friction force; the device comprises a workbench, a mounting frame, a first screw rod, a first motor, a first moving block, a hydraulic cylinder, a lifting plate, a second screw rod, a second motor, a second moving block, a third motor, a brush, a liquid outlet device, a fixing device and a buffer device, the mounting frame is installed on the upper side of the rear end of the workbench, a mounting groove is arranged at the top end in the mounting frame, the first screw rod is rotatably installed in the mounting groove of the mounting frame, the first motor is installed at the right end of the mounting frame, the output end of the first motor is connected with the right end of the first screw rod through the right end of the mounting frame, the first moving block slides in the mounting groove of the mounting frame, and the fixing device is connected with the buffer device in cooperation.

The application discloses a testing method for the content of divalent iron ions in EDTA chemical cleaning solution, and aims at the problem that the existing titration method cannot accurately determine the content of divalent iron ions due to the interference of EDTA. Instead of adopting a complex separation step, the method eliminates the interference through two steps. First, the to-be-tested solution is adjusted to be acidic to weaken the complexing capacity of EDTA, and then a sulfur-phosphorus mixed acid solution is added. The strong acidity of sulfuric acid is used to inhibit the complexing reaction and avoid hindering titration. The whole process is based on the principle of titration method, and does not need expensive instruments and reagents, and is low in cost. The operation is simple and does not need professional skills. The application adopts the high-stability potassium dichromate standard solution, reduces the calibration frequency, realizes rapid, convenient, accurate and low-cost determination, and is suitable for on-site detection requirements.

The application relates to an oil field pipeline siliceous scale cleaning agent and a preparation process thereof, and relates to the technical field of oil field pipeline maintenance and chemical cleaning. The agent comprises the following components: an interfacial active component 5-8%, a chelating agent 15-20%, a complex conversion agent 10-12%, a pH regulator 3-5%, a biodegradation promoter 2-3%, and deionized water 52-65%. The pH value of the agent system is 8-10. The oil field pipeline siliceous scale cleaning agent is matched with interfacial active components, chelating agents, complex conversion agents and various functional components to form a mutual cooperation relationship. Under the synergistic effect of the interfacial action and the chemical action, the effect of the cleaning agent can be improved, the industrial descaling and cleaning efficiency is greatly improved, the discharge of the agent meets the national environmental protection discharge standard due to the biodegradation promoter, the traditional agent is prevented from polluting the environment, the weak alkaline pH regulator has no corrosion effect on commonly used equipment substrates such as carbon steel, stainless steel and enamel, the equipment is not damaged in the descaling process, and the service life of the equipment is prolonged.

This invention discloses a membrane bioreactor (MBR) treatment method and a field return system for wastewater from sheep slaughterhouses. After three-stage pretreatment, the wastewater undergoes two-stage anoxic-aerobic denitrification, with segmented influent and two-stage internal recirculation. A short-range nitrification window is created in the first-stage aerobic zone with low dissolved oxygen through intermittent aeration, while stable nitrification occurs in the second-stage aerobic zone. The biochemically treated effluent enters a PVDF submerged ultrafiltration (MBR), where the mixed liquor suspended solids concentration and flux are controlled. Backwashing / relaxation and chemical cleaning sequences are triggered by the increase in transmembrane pressure difference per unit time, enhancing shock and fouling resistance. MBR permeate is fed into a field return tank and connected to the field return system. Precise water and fertilizer return and salt control are achieved through rapid nitrogen and phosphorus measurement, application decision-making, and stratified drip irrigation valve control. This scheme can achieve effluent ammonia nitrogen ≤3 mg / L, high total nitrogen removal, and reduced membrane fouling and nitrogen loss.

The present application relates to a kind of integrated descaling-passivation function polymer and its preparation method and application, belong to industrial equipment chemical cleaning and corrosion protection technical field, it is single compound with formula (I) shown as follows: D-L-P (I), wherein, D is the descaling function chain segment with number average molecular weight of 2,000 to 50,000, selected from polyacrylic acid segment, polyepoxysuccinic acid segment or phosphonated polyacrylic acid segment;P is passivation function end group, selected from the following formula (II) or formula (III) shown as follows: -R 1 -1H-benzotriazole-1-yl (II), wherein R 1 It is C1-C6 straight chain or branched alkylene;-R 2 -Si (OR 3 ) 3 (III), wherein R 2 It is C1-C3 alkylene, R 3 It is C1-C2 alkyl.The integrated descaling-passivation function polymer and its preparation method and application, by covalent bond, descaling chain segment and passivation end group are connected as single molecule, force realizes "clears a point, protects a point" sequence effect, fundamentally eliminates competitive adsorption, reaches the advantage of molecular level synergistic effect.

The utility model relates to chemical cleaning liquid technical field, concretely is a kind of ammonia water device in EDTA chemical cleaning dosing equipment, including equipment platform, the upper surface of equipment platform is fixedly installed with storage tank, the position of the side of storage tank near upper end is fixedly connected with first connection valve, the front side of equipment platform is provided with lifting assembly, lifting assembly includes equipment support, positioning groove, transmission shaft, transmission sprocket, transmission chain, servo motor, lifting stand, locating block, connecting plate and support frame, the upside of support frame is provided with storage bucket, the position of the side of storage bucket near lower end is fixedly connected with second connection valve, first connection valve and second connection valve between fixedly connected with connecting pipe;The storage bucket is lifted upwards using lifting assembly, and connecting pipe is connected with first connection valve and second connection valve, realize the feeding of ammonia water under sealed condition, effectively avoid ammonia water sputtering, avoid peculiar smell transmission, improve equipment safety and the neatness of operating environment.

The application belongs to the technical field of dismounting tools and discloses a sewage plant MBR membrane cleaning system which comprises a membrane pool, a negative pressure device and a detection device, an MBR membrane is arranged in the membrane pool, the negative pressure device comprises a negative pressure tank and a self-priming pump, the negative pressure tank is communicated with the membrane pool through a water outlet pipe, a water inlet of the self-priming pump is connected with a water outlet of the negative pressure tank, a water outlet of the self-priming pump is connected with a water inlet of a dosing assembly, and a water outlet of the dosing assembly is connected with a water inlet of the membrane pool; the detection device comprises a negative pressure gauge and a pH detector, the negative pressure gauge is arranged on the negative pressure pump, and the pH detector is arranged in the membrane pool. The MBR membrane is cleaned in a reciprocating cycle mode, the MBR membrane is cleaned while the cleaning agent is saved, the MBR membrane surface and the MBR membrane interior can be effectively cleaned, and the water flux is improved. The offline manual membrane dismounting, cleaning and chemical cleaning mode is reasonably replaced, the working efficiency is improved, the labor is reduced, and potential safety hazards during manual cleaning are avoided.

This invention discloses a reverse osmosis water treatment device, relating to the field of wastewater treatment technology. The device includes a treatment tank installed on the ground; a support pipe fixed to the treatment tank via brackets at both ends; and a collection pipe arranged concentrically within the support pipe. One end of the support pipe has an inlet component fixed to it, which is rotatably connected to a rotating shaft fixed to the end of the collection pipe. A torsion spring is mounted on the rotating shaft. A sealing baffle is fixed to the end of the support pipe away from the inlet component, and an outlet component is fixed to the sealing baffle. The outlet component is connected to and rotatably sealed within the collection pipe. Through the coordinated design of a synchronous deployment mechanism and an automatic reversing cleaning component, dynamic deployment and thorough cleaning of the membrane are achieved, completely removing suspended solids and other contaminants from the membrane surface and gaps. Compared to existing pretreatment technologies to mitigate contamination, this device avoids irreversible membrane fouling, extends the stable membrane flux maintenance period, and significantly reduces membrane replacement and chemical cleaning costs.

The application discloses a mild multi-effect scrub containing biosugar lipids and amino acid surfactants and a preparation method thereof. Sodium cocoyl glycinate, biosugar lipids, nicotinamide and hydrolyzed yeast extract are used as core components, physical scrub particles are matched, and cosmetic acceptable carriers such as polyols and thickening agents are compounded, and the mild multi-effect scrub is prepared through processes such as phase solubility, homogenization, temperature reduction and dispersion. The application reduces the irritation of the product from the two dimensions of chemical cleaning and physical friction, realizes the cleaning and exfoliation, simultaneously achieves the multiple effects of skin color lightening, bacteriostasis and acne removal, the core components have synergistic effects, the problems of strong irritation, single function and large environmental burden of traditional scrubs are solved, the product is suitable for sensitive skin, has environmental friendliness and verifiable efficacy, and has a wide application prospect.

The application discloses a high-pressure water jet cleaning method suitable for removing attached mortar of large-diameter recycled aggregate, and mainly relates to the technical field of hydraulic engineering construction. The application tests the surface mortar adhesion of the large-diameter recycled aggregate (recycled block stone) removed from an original dam, removes the attached mortar by using a high-pressure water jet technology, and determines the relationship between the mortar adhesion and the working pressure and flow of the high-pressure water jet. The attached mortar of the large-diameter recycled aggregate (recycled block stone) of the original dam is cleaned in batches by selecting appropriate working conditions of the high-pressure water jet, and the image recognition technology is combined to ensure that the cleaning rate of the attached mortar is greater than or equal to 98%. The method is efficient, safe and environmentally friendly, avoids chemical cleaning from causing chemical erosion and secondary pollution to the recycled aggregate, the working pressure and flow of the high-pressure water jet can be adjusted, the recycled aggregate substrate is not damaged, and the quality of the cleaned recycled aggregate is equivalent to that of natural aggregate.

This application discloses a device for deep treatment and reuse of circulating cooling wastewater from a power plant, relating to the technical field of wastewater treatment. It includes an equalization tank, a self-cleaning filter, a first safety filter, an ultrafiltration system, an intermediate water tank, a second safety filter, and a reverse osmosis system, connected sequentially along the water flow direction via pipelines. The self-cleaning filter includes a tank and a self-cleaning system. The tank is located between and connected to the equalization tank and the ultrafiltration system, and the self-cleaning system is located within the tank. A pipeline mixer is also provided between the intermediate water tank and the second safety filter. The pipeline mixer's dosing end is connected to a reducing agent dosing device and a scale inhibitor dosing device. The ultrafiltration system is equipped with a backwashing device. A chemical cleaning device is also provided, connected to both the ultrafiltration system and the reverse osmosis system. This application can reduce ultrafiltration membrane fouling and the frequency of shutdown flushing.

This utility model relates to the field of mahjong machines, specifically an automatic cleaning mahjong machine with a fixed number of tiles. An air compressor generates compressed air, which drives dry cleaning powder in a raw material storage bin. The dry cleaning powder is sprayed into the large tray area through nozzles. During the shuffling process, the dry cleaning powder chemically cleans the mahjong tiles, while a cleaning brush on a scraper performs physical cleaning. This combination of physical and chemical methods cleans the tiles simultaneously during shuffling. Waste from the dry cleaning powder is blocked by a barrier and collected in a waste collection trough as the tray rotates. The entire cleaning process is seamlessly integrated into the shuffling process, eliminating the need for a separate cleaning step. The use of dry cleaning powder also eliminates the need for water washing, simplifying the mahjong machine's structure and sealing requirements, and reducing the risk of water and electrical safety accidents. This mahjong machine has a simple structure, is easy to use, and provides excellent results.

This utility model discloses a cleaning device for immersion liquid-cooled servers, relating to the field of electronic equipment cleaning technology. It includes a cleaning tank with an ultrasonic cleaning assembly fixed to the inner wall and a PLC controller fixed to the outer wall. This utility model combines ultrasonic cleaning, circulating filtration, and chemical cleaning technologies to comprehensively and effectively remove dust, impurities, oil, and special organic metabolites from electronic components in single-phase immersion liquid-cooled servers. This significantly improves the server's heat dissipation performance and the reliability of electronic components, extending the server's lifespan. Furthermore, it efficiently recycles the cleaning fluid, reducing the amount used and replacement frequency, thus significantly lowering server maintenance costs. It also reduces the amount of cleaning agent emitted, lowering the risk of environmental pollution and meeting environmental protection and sustainable development requirements. In addition, the automated operation of the entire cleaning process improves cleaning efficiency and operational safety.

This utility model discloses a sandblasting device for renovating and repairing roller coatings, including a sandblasting mounting housing, a sandblasting mounting assembly inside the housing, a roller clamping assembly on one side of the sandblasting mounting assembly, and a roller scraping assembly on the other side of the roller clamping assembly. This utility model improves upon existing technology. In practical use, through the sandblasting mounting assembly and a single drive source, the rollers rotate while the coating sprays reciprocate, solving the problems of low efficiency and uneven surface treatment associated with traditional manual grinding or chemical cleaning. While existing mechanical sandblasting equipment can improve cleaning efficiency, it suffers from insufficient roller clamping stability, leading to uneven sandblasting coverage due to easy deviation during operation.

The utility model relates to spraying equipment technical field especially used for building construction's spraying equipment, including having support platform and water storage jar, the upper end of support platform is installed for depositing chemical cleaning agent and is convenient for subsequent can to base material surface treatment's water storage jar, the utility model discloses realized through the spray gun connection delivery pipe extraction water storage jar inside depositing chemical cleaning agent spray washes clean base material, effectively removes the dust impurity on base material surface, makes base material surface more clean, provides better adhesion basis for coating, auxiliary coating can better combine with base material, improves the adhesion of coating, secondly, the adhesion between coating and base material strengthens, can effectively prevent coating peeling, peeling, prolongs the service life of coating, and the base material surface after cleaning has no impurity interference, makes coating can more evenly distribute, forms the dense protective layer, improves the uniformity and compactness of coating.

This invention relates to the field of wastewater treatment technology, specifically to a formulation and preparation method for water treatment of reverse osmosis membranes. It comprises a scale inhibitor, a corrosion inhibitor, a bactericide, a surfactant, a pH adjuster, and deionized water. The scale inhibitor includes a terpolymer, polyepoxysuccinic acid, and a modified inorganic silica adsorbent. The modified inorganic silica adsorbent is an inorganic silica material with a silane coupling agent containing boric acid groups grafted onto its surface. The modified inorganic silica adsorbent forms dynamic borate ester bonds with the ortho-hydroxyl groups on the terpolymer segments through the boric acid groups. These dynamic borate ester bonds remain stable under the neutral pH conditions of the reverse osmosis system to maintain the integrity of the coupling structure. They undergo reversible breakage under alkaline chemical cleaning conditions, enabling in-situ regeneration of the modified inorganic silica adsorbent and automatic recombination of the scale inhibitor. This overcomes the problem of irreversible performance degradation of traditional scale inhibitors during cleaning, significantly improving the durability of the scale inhibition effect and the service life of the reverse osmosis membrane.

This utility model relates to the field of desalination membrane technology, and in particular to a high-efficiency seawater desalination membrane module, including a desalination module assembly. A bucket-shaped tube is fixedly connected to the front end of the desalination module assembly, and a cleaning component is installed inside the bucket-shaped tube. A solenoid valve is fixedly connected to the rear end of the desalination module assembly, and a water collection pipe is fixedly connected to the lower end of the lower desalination module assembly. The cleaning component includes an extension tube, with a seawater through hole and a seawater channel opened inside the extension tube. An internal frame is fixedly connected to the internal frame, and an extension rod is rotatably connected to the internal frame via a bearing. A turbine blade is fixedly connected to the front end of the extension rod, and a spiral blade is fixedly connected to the outer side of the extension rod. The spiral blade is clearance-fitted with the inner side of the seawater channel. The outer side of the extension tube is fixedly connected to the inner side of the desalination module assembly. In this utility model, the cleaning component is driven by the seawater delivery pressure to remove pollutants, reducing chemical cleaning, extending the life of the membrane module, and reducing maintenance costs and environmental impact.

The application discloses a kind of for nuclear power plant two loop systems chemical cleaning agent and cleaning method, belong to nuclear power plant equipment chemical cleaning technical field.The cleaning agent is by cleaning main agent ethylenediaminetetraacetic acid, cleaning auxiliary agent (citric acid and / or glycollic acid), corrosion inhibitor N-108, pH regulator ammonia water, reducing agent (hydrazine hydrate or D-sodium isoascorbate), organic silicon defoaming agent and solvent (deionized water or desalted water) compound is formed.The cleaning agent cleaning stage is carried out at pH 5.5~6.5, temperature 110~130 DEG C;Passivation stage is completed by supplementing ammonia water at pH 8.5~9.5, temperature 80~95 DEG C.The cleaning agent of the application has high dissolution rate (up to 96.5%) to common scale type such as Fe3O4, has very low corrosion rate (<0.005 g / m 2 ·h) to austenitic stainless steel and nickel-based alloy, and seamless conversion of cleaning and passivation can be realized by pH adjustment, the operation process is simple, the waste liquid amount is less, the environmental protection is good, and the safety, efficient operation of nuclear power unit two loop system can be effectively guaranteed.