514 results about "Chemical cleaning" patented technology

The invention discloses an efficient glass fiber plate cleaning and drying process which comprises the following steps: S1, pretreatment: performing appearance inspection on a to-be-cleaned glass fiber plate, and removing unqualified plates of which the surfaces are obviously damaged and cracked; s2, pre-cleaning: putting the glass fiber plate subjected to primary treatment into an ultrasonic cleaning tank, injecting clear water into the cleaning tank, enabling the liquid level of the clear water to completely submerge the glass fiber plate, starting an ultrasonic generator at the same time, and separating dust, loose chippings and other impurities on the surface of the glass fiber plate through the cavitation effect of ultrasonic waves to complete pre-cleaning; and S3, chemical cleaning, wherein after pre-cleaning is completed, the glass fiber plate is fed into a chemical cleaning tank containing alkaline pre-cleaning liquid. According to the technology, multiple cleaning procedures are combined with ultrasonic waves, chemical reagents and nano-particles, vacuum and hot air drying are matched, efficient cleaning and rapid drying of the glass fiber plate are achieved, few impurity residues exist, the water content is low, the surface flatness is good, parameter adaptability is high, energy is saved, environment friendliness is achieved, and the automation degree is high.

The invention belongs to the technical field of TG-DSC testing of metal powder materials, and particularly relates to an anti-oxidation high-precision TG-DSC testing method of high-temperature alloy powder, which comprises the following steps: placing the high-temperature alloy powder in a furnace body of a TG-DSC instrument, carrying out high-purity argon replacement on the atmosphere in the furnace body by taking high-purity argon as furnace body purging gas, and carrying out high-purity argon replacement on the atmosphere in the furnace body; the initial oxygen content in the furnace body is reduced to 0.1 ppm or below; continuously introducing hydrogen-argon mixed gas as flowing gas into the furnace body, controlling the temperature of the furnace body to be increased to a target temperature, and ending the test to obtain a TG curve and a DSC curve of the to-be-tested high-temperature alloy powder; according to the invention, through physical cleaning of oxygen in the furnace body by circulating vacuumizing before testing and chemical cleaning of oxygen permeating into the furnace body by hydrogen-argon mixed gas in the whole process in the testing process, a dual anti-oxidation barrier is constructed, so that oxidation weight increment and oxidation heat release interference of a powder sample are eliminated fundamentally; therefore, the real mass change and the heat flow signal change of the alloy powder sample in the temperature programming process can be accurately measured.

The invention relates to the technical field of water treatment, and provides a reverse osmosis membrane cleaning method, a cleaning agent composition and application. According to the method, whether cleaning is needed or not is determined by comparing initial operation parameters and current operation parameters of a system; the pollutant type is accurately judged by observing the appearance characteristics of the membrane surface and detecting related index parameters; and selecting a corresponding cleaning agent formula according to the pollutant type, and sequentially performing physical washing and chemical cleaning. The cleaning agent composition comprises a biological pollution cleaning agent, an organic pollution cleaning agent and / or an inorganic scaling cleaning agent. By establishing a scientific pollution diagnosis system and a targeted cleaning strategy, the problems of fixed cleaning scheme and low pertinence in the prior art are solved, the pressure difference recovery rate after cleaning can reach 90% or above, the desalination rate recovery rate can reach 99% or above, the cleaning efficiency is remarkably improved, the operation cost is reduced, and the service life of the membrane is prolonged.

According to the efficient water treatment system based on the reverse osmosis membrane and the control method provided by the invention, gradient anti-pollution membrane arrangement and reconfigurable intelligent waterway design are creatively combined, so that a foundation is laid for high-flux and low-pollution operation from a physical structure; meanwhile, a full-closed-loop intelligent control system is constructed, and by fusing fuzzy logic, an optimization algorithm and a neural network prediction model, the system can integrate multi-dimensional information such as inlet water quality, membrane pressure difference and water yield, judge pollution risks in real time and adaptively and seamlessly switch among a high recovery mode, a segmented flushing mode and a prediction cleaning mode, so that the system is high in recovery efficiency and high in reliability. Meanwhile, parameters such as pump frequency and valves are dynamically optimized to find an optimal balance point of recovery rate and energy consumption; according to the invention, the recovery rate can be stably improved, the membrane pollution rate is greatly reduced, the chemical cleaning period and the service life of the membrane element are prolonged, and finally, the comprehensive operation and maintenance cost of the system is remarkably reduced while the water treatment efficiency and the water quality safety are improved.

The invention provides an intelligent maintenance cleaning device for nanofiltration membrane pollution control and a method thereof, and solves the problems of low maintenance cleaning efficiency, poor adaptability of cleaning parameters and pollution conditions and frequent chemical cleaning of an existing nanofiltration system. Belongs to the technical field of membrane pollution control. According to the invention, the filtering system, the cleaning system and the intelligent decision-making module are integrally designed, so that the closed-loop control of the whole process of real-time monitoring, pollution identification, intelligent decision-making and automatic cleaning of the running state of the nanofiltration membrane is realized. The cleaning effect gating memory neural network model is used as a membrane pollution prediction model, membrane pollution can be accurately predicted, and key cleaning nodes can be identified. The optimal membrane cleaning parameters are generated by adopting a non-dominated sorting genetic algorithm, the usage amount of chemical agents and the cleaning cost are reduced, and the membrane pollution control effect is improved. The invention is applicable to the field of drinking water treatment.

The utility model discloses a domestic sewer line, and belongs to the field of sewer lines. The domestic sewer line comprises a sewer line and a cut-off piece, the cut-off piece comprises a cut-off valve or a plug block, one end of the sewer line is used for being connected with a pool, and the cut-off piece is installed at the end, close to a public pipeline, of the sewer line and used for cutting off the end, close to the public pipeline, of the sewer line. The end, close to the public pipeline, of the sewer pipeline can be cut off through the cut-off piece, then the chemical cleaning agent is used, the retention time of the chemical cleaning agent in the sewer pipeline is prolonged, and the problem that in the prior art, the cleaning agent cannot make full contact with grease, and consequently the cleaning effect is limited is solved.

The invention relates to the technical field of water quality detection devices, in particular to a water quality detection device. According to the technical scheme, the device comprises a rack and a transparent detection tube mounted in the rack, optical detection modules are fixedly mounted in the rack and located on the two sides of the detection tube, the device further comprises a sliding groove formed in one side of the detection tube, a lifting driving assembly mounted in the rack and used for driving the detection tube to do lifting motion, and a blocking and draining part mounted in the rack, the plugging drainage part comprises a plugging pipe which is rotationally mounted in the rack and used for plugging the sliding groove, and a plurality of drainage mechanisms are fixedly mounted on the plugging pipe. The technical problem that pipeline pollution and detection continuity are difficult to consider in optical detection is effectively solved, the accuracy and reliability of long-term monitoring data are greatly improved, meanwhile, the maintenance frequency and use of chemical cleaning agents are reduced, and the system has the important advantages of being high in automation degree and high in severe water quality adaptability.

The invention discloses a medium-high voltage formed foil and a preparation method thereof, and an aluminum electrolytic capacitor, and the method comprises the steps: placing a corrosion foil sheet in vacuum plasma equipment, processing for a set time, introducing oxygen or a mixed gas of argon and oxygen into the vacuum plasma equipment, and carrying out the treatment for a set time; transferring the foil from the vacuum plasma equipment into a first organic solvent tank to be soaked for a certain time, wherein the boiling point of a first organic solvent is lower than 60 DEG C; and performing formation treatment. According to the technical scheme provided by the embodiment of the invention, the etched foil is pretreated, and the carbon content of the surface of the etched foil is reduced or cleared through the synergistic effect of physical cracking and chemical cleaning, so that the surface activity and cleanliness of the etched foil are improved. Meanwhile, according to the pretreatment step, carbon residues are thoroughly removed, pollution of impurity decomposition to a formation tank is avoided, the service life of tank liquid is prolonged, and meanwhile the current efficiency in the anodic oxidation process and the uniformity of an oxidation film can be improved through the corroded foil with the high surface activity and cleanliness.

The invention belongs to the technical field of reverse osmosis membranes, and relates to a visible-light-responsive carbon nitride / zinc oxide heterojunction modified reverse osmosis membrane and a preparation method thereof.The method specifically comprises the steps that porous ultrathin carbon nitride nanosheets are prepared; synthesizing zinc oxide nanoparticles rich in oxygen vacancies; and compounding the two to form the Z-type heterojunction photocatalyst. The heterojunction is stably loaded in a polyamide separation layer through an interfacial polymerization process, the composite reverse osmosis membrane is prepared, and the membrane disclosed by the invention has a remarkable visible light response characteristic while maintaining a high desalination rate. The method has the core advantages that the visible light utilization rate and the photo-generated charge separation efficiency are remarkably improved through the construction of the heterojunction, so that the membrane can actively and efficiently degrade organic pollutants under illumination, self-cleaning is realized, the anti-pollution capacity is greatly improved, and the chemical cleaning period is greatly prolonged.

The application discloses a MABR membrane aeration biofilm reactor for advanced treatment of sewage, and belongs to the technical field of sewage treatment. The height of the moving seat is adjusted through the adjusting assembly. The fixed ring drives the flexible ring and the scraper to rotate through the plurality of elastic columns, and the mud and impurities attached to the outside of the MABR membrane are scraped. The elastic column and the flexible ring are deformed under the action of external force and are in flexible contact with the outside of the MABR membrane through the scraper, so that the damage of the scraper to the MABR membrane is prevented, and the closely attached biofilm fragments or hard scale on the MABR membrane can be removed. Since the plurality of scrapers are located between the two suction pipes, the fallen mud and impurities can be effectively extracted by the suction holes, so that the secondary pollution of the MABR membrane caused by the floating mud and impurities is prevented. Therefore, the traditional cleaning method of using a single flushing method or using a chemical cleaning method is abandoned, the cleaning effect is improved without damaging the MABR membrane, and the service life of the MABR membrane is prolonged.

The invention relates to a high-frequency electric resistance welding method for a transformer, and relates to the technical field of metal welding. A layer of self-reaction soldering paste is applied to the to-be-welded surface of the coil or the iron core to serve as a middle layer; and performing high-frequency resistance welding after mounting and positioning. The self-reaction soldering paste is the technical core of the invention and is composed of a powder mixture containing a solid chemical reducing agent and nano metal particles and an organic carrier. Under excitation of welding heat, the solid chemical reducing agent is subjected to an in-situ chemical reaction, and metal oxides on a welding interface are effectively removed; and meanwhile, the low-melting-point nano metal particles are rapidly melted, the purified clean interface is filled, and a compact metallurgical bonding layer is formed. Through the synergistic effect of chemical purification and physical filling, a defect-free welding joint is obtained, the welding joint has excellent mechanical strength and extremely low contact resistance, the process window is remarkably widened, and the reliability of the welding process is improved.

The invention relates to the technical field of surface treatment, discloses a dry ice sand blasting-chemical dissolution-ultrasonic collaborative cleaning process for a nano aluminum oxide coating part, and aims to overcome the defects of an existing cleaning technology in the aspects of removing a complex deposited film, protecting the coating integrity and improving the cleaning efficiency. The method comprises the steps of isopropanol soaking treatment, flowing pure water flushing, hot water soaking treatment, carbon dioxide dry ice sand blasting treatment, chemical cleaning of a niflumic acid mixed solution, high-pressure water washing, ultrasonic cleaning and the like. By the adoption of the technical scheme, the efficient, thorough and lossless cleaning effect can be achieved, and the high-standard requirement for cleaning of the nanometer aluminum oxide coating part in the modern industry is met.

The invention provides an anti-pollution large-flux reverse osmosis RO membrane as well as a preparation method and application thereof, belongs to the technical field of reverse osmosis membranes, and discloses an anti-pollution large-flux reverse osmosis RO membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a water phase solution and an oil phase solution, forming a polyamide separation layer through interfacial polymerization, grafting an anti-pollution functional group through post-treatment, and removing an additive complex. The membrane comprises a supporting layer and a polyamide separation layer, the surface of the separation layer is grafted with a specific anti-pollution functional group, and the separation layer has low roughness and a low Zeta potential absolute value. The working principle is based on interfacial polymerization and surface functional modification, and separation, pollution resistance and flux performance are improved by optimizing the structure. During use, water inlet conditions are controlled, and regular chemical cleaning is realized. The membrane balances the separation efficiency, flux and pollution resistance, solves the problems of easy pollution and low flux of the traditional membrane, reduces the operation cost, and improves the water treatment efficiency.

The invention discloses a metal sintering filter and an online cleaning method, the filter comprises a cylinder body, a cylinder cover, a metal sintering filter core and an ultrasonic cleaning device, the cylinder cover and the cylinder body are detachably connected through a bolt, and a sealing structure is arranged between the cylinder cover and the cylinder body; an annular ultrasonic probe is installed at a flange connector in the middle of the inner wall of the barrel through a connecting part, the probe extends into the barrel and surrounds the metal sintering filter element, and all-directional cleaning is achieved by means of the penetrating power of ultrasonic waves. The online cleaning method sequentially comprises the steps of emptying and isolating, reverse blowing of inert gas to remove large particles, acid chemical cleaning and ultrasonic deep cleaning cooperative treatment, boiler water rinsing and neutralizing and drying and resetting. Online efficient decontamination can be completed without disassembling the filter element, the filtering performance of the filter element can be effectively recovered, operation is convenient, stability is high, and the filter element can be widely applied to various filtering scenes needing frequent cleaning.

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..

The utility model relates to the technical field of lighting devices, and discloses a turnover type lighting device which comprises a cleaning box, a turnover lighting device body rotating around the length direction of the cleaning box is arranged on the cleaning box, the turnover lighting device body comprises a U-shaped rotating frame, and the rotating frame comprises a transverse rod and connecting rods located at the two ends of the transverse rod. Light bars are arranged on the inner side faces, facing the connecting rods, of the transverse rods, and the free ends of the connecting rods are rotationally connected with the buckling corners of the outer side faces of the cleaning box end plates; the turnover lighting device is arranged outside the cleaning box, on one hand, damage to the light bar caused by water scouring in the cleaning process can be prevented, the situation that personal safety and equipment safety are threatened by negative effects such as short circuit is avoided, corrosion of chemical cleaning agents can be eradicated, and the service life is prolonged; and on the other hand, the external structure is convenient to maintain and does not conflict with the internal cleaning process, that is, integral maintenance of the lighting device or replacement of parts can be achieved in the cleaning process.

The utility model discloses an MBR integrated device for assisting PACT purification, and belongs to the technical field of water treatment. The device consists of an MBR membrane pool, a backwashing tank, an air blower, a storage pipe, a reflux pump, a water inlet pipe, a water production pipe, a spraying pipe, a reflux pipe, a backwashing pipe and an MBR membrane, the MBR membrane is arranged in the MBR membrane pool, and a certain gap is reserved between the bottom of the MBR membrane and the bottom of the inner side of the MBR membrane pool; a plurality of groups of spraying devices are arranged on the spraying pipe above the MBR membrane tank; the storage pipe is vertically arranged in the MBR membrane tank; the device is also provided with a cleaning tank, and the MBR membrane to be subjected to off-line backwashing is placed in the cleaning tank. According to the MBR membrane cleaning device, online cleaning, online chemical cleaning and offline cleaning of the MBR membrane are achieved, the service life of the MBR membrane is guaranteed, meanwhile, the offline cleaning transportation cost is reduced, damage to equipment caused by repeated carrying is avoided, in addition, activated carbon powder is conveyed to a regeneration system through the storage pipe, and the recovery efficiency of the activated carbon powder is improved.

The utility model relates to the field of semiconductor packaging, and provides a glass cleaning device and glass cleaning equipment, and the glass cleaning device comprises a chemical cleaning module which is used for carrying out chemical cleaning on the glass surface of a packaging structure; the drying module is used for drying the glass surface of the packaging structure after cleaning; and the mechanical cleaning module is used for mechanically cleaning the glass surface of the packaging structure after drying. By adopting a combined mode of chemical cleaning, drying treatment and mechanical cleaning, particulate pollutants and other pollutants on the glass surface can be effectively removed from multiple aspects, and the cleaning effect and the cleaning efficiency are greatly improved.

The system comprises two cleaning boxes, rotatable roller bodies are arranged in the cleaning boxes, feeding ports are formed in the upstream ends of the cleaning boxes, discharging ports are formed in the downstream ends of the cleaning boxes, high-pressure steam output devices are arranged in the cleaning boxes, and the two cleaning boxes are arranged in series. The discharging port of one cleaning box is located at the upstream end of the feeding port of the other cleaning box. According to the system, the outer wall of the collecting pipe can be efficiently cleaned, the cleaning efficiency of the collecting pipe is high, the cleaning quality can be guaranteed, chemical cleaning agents are not needed, environment-friendly cleaning is achieved, the dryness of the outer wall of the collecting pipe can be guaranteed, secondary treatment is not needed, and the system can be connected with automatic conveying lines of other procedures; and the automation requirement of collecting pipe production is met.

The application relates to the technical field of metal welding, and discloses a furniture metal sheet welding process based on a multi-section compression anti-warping structure, which comprises the following steps: S1, checking the sheet material, thickness and surface state, making the sheet material meet the requirements, and clearly defining the weld position and length; S2, using the methods of chemical cleaning, mechanical polishing and sand blasting to remove the oil stains, rust, oxide scale impurities on the surface of the metal sheet, making the surface expose the metal luster, and ensuring the welding quality. The furniture metal sheet welding process based on the multi-section compression anti-warping structure can effectively solve the problems in the prior art that plastic deformation is caused during the welding of the metal sheet, and then the sheet appears the warping phenomenon; the warping can make the welded metal sheet deviate from the originally designed size specification, causes the poor cooperation in the subsequent assembly process, increases the assembly difficulty and cost, and even causes the problem that the whole product cannot be normally assembled.

The utility model discloses a water soluble paraffin removal ball, which relates to the technical field of paraffin removal balls and comprises a paraffin removal ball body, a cleaning agent storage component is mounted in the paraffin removal ball body and comprises a storage tank, a through hole, a chemical cleaning agent and a water soluble plastic film, the paraffin removal ball comprises a paraffin removal ball body, a storage groove is formed in the paraffin removal ball body, the storage groove is filled with a chemical cleaning agent, a plurality of through holes are formed in the outer side of the paraffin removal ball body and penetrate through the inner wall of the storage groove, and a water-soluble plastic film is installed on the inner side of one end of each through hole. The synthetic material of the paraffin removal ball body is ethylene vinyl acetate, and the paraffin removal ball body can be dissolved in a crude oil environment, so that the paraffin removal ball body can be automatically dissolved in an oil pipe after being used for 24 hours, the oil pipe is prevented from being blocked, the paraffin removal ball does not need to be found, and the paraffin removal ball is more convenient to use.

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 invention provides a method for growing a germanium epitaxial layer in a deep silicon groove, and relates to the technical field of semiconductor manufacturing. The method comprises the following steps: photoetching and etching a Si / SiO2 substrate to form a deep silicon groove with a preset depth, and soaking the Si / SiO2 substrate with the deep silicon groove in a TMAH solution to perform first cleaning; and then soaking the Si / SiO2 substrate with the deep silicon groove in a wet-process chemical cleaning solution so as to carry out secondary cleaning. And finally, performing a selective germanium epitaxial process in the deep silicon groove so as to form a germanium epitaxial layer. According to the technical scheme, the TMAH cleaning process is added before the traditional cleaning process, so that the optimization of the roughness of the side wall of the deep silicon groove is realized, a good epitaxial foundation is provided for subsequent germanium epitaxy, the quality of the germanium epitaxial layer can be improved, the situation that small holes appear after the germanium epitaxial layer is ground to be flat through CMP (Chemical Mechanical Polishing) surface is avoided, and the quality of the germanium epitaxial layer is improved. The performance of the germanium device is stabilized; and the loss of the optical chip waveguide is reduced.

The invention discloses an improved chemical cleaning device based on an RO system, and belongs to the technical field of water treatment. The improved chemical cleaning device based on the RO system comprises a cleaning box body, the upper end of the cleaning box body is fixedly connected with one side of a first chemical adding hopper assembly through a pipeline, a cleaning liquid inlet is formed in the other side of the first chemical adding hopper assembly, and the upper end of the first chemical adding hopper assembly is fixedly connected with the lower end of a connecting pipe; when the air pump works, air in the T-shaped pipe flows at a high speed to generate a static pressure difference, the piston is pushed to move, the piston drives the L-shaped rod to move synchronously when moving, the L-shaped rod drives the arc-shaped groove to deflect so as to control the baffle to be opened and closed periodically, when the air pump stops, the spring pulls the piston to reset so as to close the baffle, and intermittent falling of medicine is achieved. Medicine accumulation is avoided, and batch-by-batch dissolution is ensured.

The utility model discloses a general chemical cleaning device, which belongs to the technical field of general chemical industry and comprises a first moving plate, a fixing rod is fixedly connected to the lower side of the first moving plate, a fixing disc is fixedly connected to one end, far away from the first moving plate, of the fixing rod, and a first rotating disc is rotatably connected to the lower side of the fixing disc. A second motor is installed in the first rotating disc, the output end of the second motor is fixedly connected with a second rotating disc rotationally connected with the interior of the first rotating disc, and the end, away from the second motor, of the second rotating disc is rotationally connected with a connecting rod. The angle of the connecting rod is driven to change, the sliding block and the cleaning brush are driven to move, and the universal chemical barrels of different sizes can be cleaned.

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 flushing device for a complex reverse osmosis nanofiltration system, and belongs to the technical field of machinery and reverse osmosis nanofiltration. The equipment at least comprises a water source part, a pump set part and a pipeline valve part, the equipment at least comprises a flushing water tank, a flushing pump set and a make-up pump set, and a water tank is connected with all the pump sets in series through pipelines and then connected to all water using points through pipelines; manual valves are arranged on the pipelines and used for controlling emptying and overhauling of the water tank; the water tank is provided with an online liquid level meter for monitoring high and low liquid levels and low liquid level protection, and the pump is stopped when the liquid level is low; the water tank water inlet pipe is connected to the membrane system water producing pipe; the water tank water outlet pipe is a main pipe and is connected with a water inlet branch pipe of the pump set. According to the utility model, all membrane stacks of the complex reverse osmosis nanofiltration system can be simultaneously flushed and flushed in sections; the purpose of high-quality water replenishing of a chemical cleaning system and a dosing system can be achieved; the flushing system is simple in design and convenient to operate.

A cleaning agent according to the present disclosure is sprayed onto a cleaning target. The cleaning agent contains an alkaline aqueous solution of baking soda and glass particles. In cleaning with the cleaning agent, the physical cleaning power of solid cleaning components, containing the glass particles, and the chemical cleaning power through the alkaline aqueous solution of baking soda work simultaneously.