54results about How to "Avoid redissolution" patented technology

The invention discloses an incineration disposal method for high-salinity wastewater. The high-salinity wastewater is sprayed into a combustion chamber I after being atomized by utilizing a waste liquid spray gun through compressed air. In the combustion chamber I, the consumption of auxiliary fuel and air supply volume are controlled through temperature feedback to keep furnace temperature at 600-700 DEG C. Smoke generated in the combustion chamber I enters a combustion chamber II under the action of an induced draft fan; in the combustion chamber II, the consumption of the auxiliary fuel and the air supply volume are controlled through the temperature feedback to keep the furnace temperature at 1100-1200 DEG C, and moreover, the standing time of the smoke is longer than 2 seconds. Smoke coming out from the combustion chamber II enters a waste heat boiler, and the heat of the smoke is recycled through heat exchange. Smoke coming out from the waste heat boiler is respectively dedusted and deacidified through a bag type dust collector and a smoke deacidification unit, and then, is discharged on the standard. According to the incineration disposal method for the high-salinity wastewater, not only can saline matter in the high-salinity wastewater be separated out through the evaporation of water without coking but also hazardous organic matters in the smoke can be fully destroyed by fire.

The invention discloses a method for treating nickel-containing electroplating wastewater and recovering nickel by electrolysis. The method has the characteristics of simple process, no secondary pollution, high removal rate and recyclable deposited metallic nickel. The nickel-containing electroplating wastewater is subjected to electrolysis treatment by an electrolysis treatment nickel-containing electroplating wastewater device, which comprises an electrolytic bath and an electrolyte stirring apparatus, wherein the anode adopts a titanium-based platinum electrode; the cathode adopts a nickel electrode or a graphite electrode; and a pH meter is arranged in the electrolytic bath. The method for treating the nickel-containing electroplating wastewater by electrolysis comprises the following steps: before the electrolysis treatment, putting the nickel-containing electroplating wastewater serving as an electrolyte into the electrolytic bath, and adding alkali solution into the electrolyte to adjust the pH value of the electroplating wastewater; and adding the aqueous alkali into the electrolyte during the electroplating to adjust the pH value of the electrolyte to between 6.0 to 9.0, and recycling the nickel precipitated from a negative plate by measuring the charge accumulation amount of the electrolyte.

The invention discloses an electrolysis unit for efficiently recovering heavy metal ions, which comprises an electrolytic cell, a cathode, a cathode anchor, an anode, an anion exchange membrane module, a deionization inlet pipe, an anolyte outlet pipe, a catholyte outlet, an extract (electrolyte) storage tank and a high pressure pump. The cell body takes the shape of a cylinder, and the bottom takes the shape of a taper and is provided with a metal powder storing hopper. The cathode and the anion exchange membrane module are distributed in a concentric circle; the anode is arranged in the center of the electrolytic cell and enclosed by the anion exchange membrane module, thus forming an anode chamber; the periphery of the anion exchange membrane module, and the cathode and the inner side of the electrolytic cell form a cathode chamber. The cathode is a multidimensional net structure consisting of stainless steel wires and is supported by the cathode anchor (a back washing system) consisting of PVC pipes. The whole device adopts an online detection device for controlling the treatment and discharging of liquid containing heavy metal and can realize the automation of the electrolytic process.

The invention relates to a floating type device riverway bottom pollutant removing and purifying device and method. The device comprises one or more front end devices provided with a microorganism carrier module, a settling pond, a pollution isolating film and a sensor, one or more rear end devices provided with a microorganism carrier module cover, a pollution isolation film, a microorganism culture supply device, a high-concentration oxygen dissolving device and a floater, and a middle device comprising a primary sediment collecting device, a secondary sediment collecting device, a pressurized air spraying device, a small bubble generating device, an underwater camera, a pollution isolation film and a floater. The device can float on the surface of different water bodies such as rivers, lakes, river water and oceans to remove suspended solids, sediment and pollutant bottom mud in water, and the water ecological restoration problem is fundamentally solved.

The invention discloses a method for treating zinc-containing electroplating wastewater and recovering zinc by electrolysis. The method has the characteristics of simple process, no secondary pollution, high removal rate and recyclable deposited metallic zinc. The zinc-containing electroplating wastewater is subjected to electrolysis treatment by an electrolysis treatment zinc-containing electroplating wastewater device, which comprises an electrolytic bath and an electrolyte stirring apparatus, wherein the anode adopts a titanium-based platinum electrode; the cathode adopts a zinc electrode or a graphite electrode; and a pH meter is arranged in the electrolytic bath. The method for treating the zinc-containing electroplating wastewater by electrolysis comprises the following steps: before the electrolysis treatment, putting the zinc-containing electroplating wastewater serving as an electrolyte into the electrolytic bath, and adding alkali solution into the electrolyte to adjust the pH value of the electroplating wastewater; and adding weak base solution into the electrolyte during the electroplating to adjust the pH value of the electrolyte to between 6.0 to 7.9, and recycling the zinc precipitated from a negative plate by measuring the charge accumulation amount of the electrolyte.

A carbonaceous composition usable to constitute a supercapacitor cell electrode, a porous electrode usable to equip such a cell, a process for manufacturing this electrode and one such cell incorporating at least one such electrode, for example in order to equip an electric vehicle. This composition is usable to be in contact with an aqueous ionic electrolyte, is based on a carbonaceous powder and comprises a hydrophilic binder-forming system. The system may include between 3% and 10% by weight a first crosslinked polymer having a number-average molecular weight Mn of greater than 1000 g / mol and having alcohol groups, and between 0.3% and 3% by weight a second polymer of at least one acid and which has a pKa of between 0 and 6 and a number-average molecular weight Mn of greater than 500 g / mol, the first polymer being crosslinked thermally in the presence of the second polymer.

The present invention relates to a gas-liquid separation device. One aspect of the present invention provides a gas-liquid separation device comprising: a housing provided with a first supply part and a second supply part; a rotation shaft which is rotatably provided to the housing; a driving unit for rotating the rotation shaft; a fixed cone which is placed inside the housing, includes an inclined area, the diameter of which decreases from the first supply part side to the second supply part side, and is provided with a first through-hole, through which the rotation shaft passes, and at least one second through-hole for passing a second fluid introduced through the second supply part; and a rotation cone which is placed inside the housing so as to be spaced apart from the fixed cone, and is mounted on the rotation shaft so as to be rotated with the rotation shaft.

The invention discloses a preparation and processing method of a high-strength and high-conductivity copper alloy strip, and belongs to the technical field of metal material preparation and processing. A copper alloy strip blank with excellent surface quality, compact structure and columnar crystal structure with high orientation degree in the continuous casting direction is produced by adopting atemperature control casting mold continuous casting technology; the procedures of homogenizing annealing and solid solution treatment are cancelled; and repeated single-pass large-deformation cold rolling and aging treatment are directly carried out to obtain the high-quality and high-performance copper alloy strip with excellent mechanical property and conductivity. The preparation and processing method has the advantages that the preparation and processing process flow of the copper alloy strip is short, the fine, dispersed and multi-scale mixed uniform distribution of the precipitated phase of the copper alloy strip can be promoted, the precipitated phase can be more fully precipitated, the solid solution of alloy elements in a matrix is reduced, and the copper alloy strip with a continuous fiber strip-shaped structure in the length direction and excellent comprehensive performance is obtained.

Disclosed is a dye for dye-sensitized solar cells that is composed of a compound classified as a merocyanine dye, has a structure wherein electron donor units and electron acceptor units are joined with a conjugated double bond, and has excellent photoelectric conversion and durability. With the dye, it is possible to provide a semiconductor electrode that is sensitized by the dye as well as a dye-sensitized solar cell made by using the semiconductor electrode.

The invention discloses a reaction chamber for alumina production, which comprises a reaction chamber outside the reaction chamber and a precipitation cylinder. The upper end of the reaction chamber outside the reaction chamber is provided with an equipment compartment, and a first drive motor is installed inside the equipment compartment. The front end of a drive motor is connected with a reducer, and the front end of the reducer is equipped with a connecting shaft, the outside of the connecting shaft is connected with a stirring blade, and the outer surface of the stirring blade is provided with a fan hole, and the inside of the fan hole is A rotating shaft is connected, and fan blades are installed on the outer surface of the rotating shaft, a bearing is arranged on the inner bottom surface of the precipitation cylinder, and a placement plate is installed on the lower end of the precipitation cylinder. The reaction chamber for alumina production is designed with sound-absorbing boards, reducers, stirring blades, bearings, refrigerators, gear plates, rollers, damping plates and pneumatic devices, which can absorb noise, increase the speed of precipitation, and reduce The cooling time can prevent the balance in the precipitation cylinder from being broken, causing the aluminum hydroxide crystals to dissolve into the solution again.

The invention relates to a novel wet-process flue gas desulfurization wastewater treatment system which comprises a high-efficiency precipitator (2) and is characterized in that the high-efficiency precipitator (2) is communicated with a desulfurization wastewater source, the outlet of the high-efficiency precipitator (2) is communicated with a high-efficiency precipitator sludge discharge pump (25) and a PH adjusting tank (3) through pipelines; the PH adjusting tank (3) is communicated with a softening reaction tank (7); the softening reaction tank (7) is communicated with a settling tank (11); the settling tank (11) is communicated with a tubular micro-filtration membrane (15); the tubular micro-filtration membrane (15) is communicated with a backwashing water column (16); the backwashing water column (16) is connected with a clean water tank (20); a membrane cleaning acid liquid metering tank (31) and a membrane cleaning alkaline liquid metering tank (32) are respectively communicated with a clean water pump (33); a sludge concentrator (23) is communicated with a membrane concentrate discharge electric valve (22), a box type filter press filtrate discharge electric valve (29) and an outlet of a settling tank sludge discharge pump (24) through the pipeline. The novel wet-process flue gas desulfurization wastewater treatment system provided by the invention has the characteristics of being novel in process, compact in structure, stable in running, and low in investment and running expense.

The invention discloses an internal type headless high-pressure deaerator. The internal type headless high-pressure deaerator comprises a barrel body, wherein an internal barrel body, a water-spraying inner barrel, a re-boiler, a steam mixing outer barrel, a heating steam tube, a re-boiling heating tube and a deaerated water outlet are mounted inside the barrel body; a water feeding tube, a water return tube and a gas exhaust tube are arranged on a barrel body surrounded by the internal barrel body; and a spraying device and a filler layer are further arranged inside the internal barrel body from top to bottom. The invention further provides a deaeration method which separates oxygen in water through a tertiary device. Compared with a conventional system with a deaeration head, the internal type headless high-pressure deaerator has the beneficial effects of reducing equipment height, greatly reducing civil engineering cost, reducing lift of a water inlet pump, achieving the energy-saving effect, being more complete in deaeration, and being capable of achieving effect of 0.05 ppm, and being applicable when a steam temperature ranges from 104 DEG C to 190 DEG C. The internal type headless high-pressure deaerator is simple and compact in structure, and is convenient to mount and maintain.

The invention discloses an orange light thermally activated delayed fluorescence material as well as a synthesis method and application thereof, and belongs to the technical field of organic photoelectric materials and devices. The orange light thermally activated delayed fluorescence material is DV-Cz-DCPP and is a thermal crosslinking type TADF molecule, use of a metal catalyst can be avoided inthe polymerization process, further purification treatment is not needed, and the polymer synthesis and purification process is simplified. In the application, a redissolution process of the polymercan be avoided through an in-situ polymerization method, a polymer synthesis process and a light-emitting layer film manufacturing process are combined into one, and the device manufacturing process is simplified; and the proportion of the host-guest content can be accurately controlled, so that the stability and the light-emitting quality of the white light device can be improved. The polymer film subjected to in-situ crosslinking by applying the DV-Cz-DCPP has the characteristics of good film-forming property, good stability, strong solvent corrosion resistance and the like, is convenient for further spin coating of an electron transport material, provides guarantee for a full-wet device, improves the utilization rate of the material, reduces the cost and improves the productivity.

The invention discloses an electrostatic spinning receiving device, which comprises a water pipe, a water tank, syringe needles, an grounding electrode, non-woven fabric wet tissue, a circulating water tank and a roller, wherein the water tank is arranged above the circulating water tank; the water pipe is communicated with the water tank; the water pipe is fixedly provided with the syringe needles; the roller is arranged on the circulating water tank; the non-woven fabric wet tissue covers the roller; the roller is connected with the grounding electrode; and the circulating water tank is provided with a water tank water discharging outlet. When the electrostatic spinning receiving device disclosed by the invention is applied, the non-woven fabric wet tissue overlaid on the roller can fully contact with the water surface of the water tank; when the roller continuously rotates, the non-woven fabric wet tissue also can continuously adsorb moisture; and a circulating process can be formed through the water tank on the upper end of the roller and the water tank water discharging outlet on the bottom of the water tank. Therefore, DMAc and LiCl can be guaranteed to be adsorbed by constant moisture, fiber redissolution can be prevented, or the phenomenon that the fiber morphology is damaged to become a cast film can be prevented.

A method for preparing a composite material from a waste appearing as sludge is provided. The method comprises a step consisting in putting said waste appearing as sludge in contact with a dry cement mixture. Also provided are the thereby obtained composite material and the use of such a method for treating and / or inertizing wastes and notably industrial and / or radioactive wastes.

The invention discloses an in-vehicle pollution remover, and belongs to the technical field of automobile deodorants. The remover comprises the following components: 0.8 to 1.2 percent of ammonium acetate, 0.23 to 0.27 percent of triglyceride, 0.002 to 0.004 percent of menthol, 0.23 to 0.27 percent of sodium chloride, 0.25 to 0.35 percent of glycine and the balance of distilled water. The remover is an oil-in-water environment-friendly product, is prepared from amino acid and plant essence, is slightly fragrant and free of harmful components, and does not have any harmful effects on human health. The product is smeared and spread in a vehicle and on an ornament to be in full contact with an odor source such as formaldehyde, benzene, xylene and TVOC in the vehicle, and is wiped and cleaned after being naturally dried to remove odor in the vehicle with the removal rate of more than 99.3 percent.

The invention provides a perovskite material, a preparation method thereof, a light absorption layer and a perovskite cell. The preparation method comprises the following steps: 1) spraying a B-site precursor on a substrate to obtain a B-site precursor film; 2) spraying a precursor containing an A-site substance and an X-site substance onto the B-site precursor film to obtain a perovskite film; and 3) performing freezing treatment on the perovskite film, and then performing purging and annealing to obtain the perovskite material. The perovskite material film obtained by the method is compact and uniform, the material utilization rate in the preparation process is very high, and meanwhile, large-area preparation can be carried out; high temperature is not needed in the preparation process,and the method is especially suitable for preparing the flexible perovskite cell; and the prepared large-area flexible cell also realizes relatively high photoelectric conversion efficiency and showsa very high industrial application prospect.

The invention discloses NISS (No Inner circumference with Stepfeed System) phosphorus and nitrogen removal automatic control device and process, belonging to the technical of deep biological phosphorus and nitrogen removal from sewage. A touch screen PLC (Programmable Logic Controller) automatic control cabinet of the device is connected with a water feed pump, an online COD (Chemical Oxygen Demand) analyzer and the like in the NISS phosphorus and nitrogen removal device, the feed water concentration and related parameters in the phosphorus and nitrogen removal system are effectively controller, and unmanned operation is realized in the treatment process. The carbon source in original water is utilized to the maximum extent by feeding water in two steps, so that the biological phosphorus and nitrogen removal of sewage can be realized without adding extra carbon sources, and the cost is reduced. Because online monitoring is adopted, the parameters of water feed quantity and the like can be automatically adjusted, so that the impact and load resistance of the entire system is improved. By automatically adjusting the current of a matched air blower for controlling the concentration of dissolved oxygen, the wastage of electrical energy under the condition of low water feed quantity is avoided, the operating cost of water plants is effectively lowered, and meanwhile, the effects of saving energy and reducing consumption are achieved.

The invention belongs to the technical field of environment control, and discloses an anti-seepage coating layer with a heavy metal chelating function as well as a composition and application thereof. The anti-seepage coating layer is provided with a plurality of heavy metal bonding sites, and integrates multiple functions, such as heavy metal chelating function, adhering function, hydrophobic function, and film forming function. The composition of the coating layer has the advantages that micro-nano particles and macromolecular film forming matters are wound and chemically bonded together, so as to form a stable hydrophobic anti-seepage macromolecular film; the usage amount is small, the cost is low, and the stabilizing effect of heavy metal is efficient and lasting.

The invention discloses a peripheral thermal cross-linking dendritic group, a thermal cross-linking dendritic thermal activation delayed fluorescence material and a synthesis method and application thereof, and belongs to the field of organic photoelectric materials and organic light emitting diode devices. The molecular structure of the fluorescent material consists of three parts, wherein the first part is a luminous core with a thermal activation delayed fluorescence property; the second part is a carbazole group connected through a non-conjugated group and used as a peripheral dendritic group; and the third part is a styrene thermal crosslinking group connected to the periphery of the dendritic group. The novel material has the advantages that the steric hindrance effect of peripheraldendritic groups can effectively inhibit concentration quenching of triplet excitons, and the performance of a light-emitting device is improved; due to the introduction of alkyl chains, the solubility and the film-forming property of the material can be effectively enhanced; the introduction of the thermal crosslinking group can enhance the stability and film-forming property of a solid film. Thethermally activated delayed fluorescence material has good luminescence property and film-forming property, and is suitable for preparing organic electroluminescent devices by a wet method.

The invention relates to a method for removing heavy metals from sludge. Biological leaching of sludge is carried out by supporting thiobacillus on biochar, and and can efficiently remove a variety ofheavy metals in the sludge by combining with elimination and renewal of hydrops, biochar adsorption and the like with low energy consumption, low cost and no need of calcining and heating. The sludgetreated by the method has a high removal rate of the heavy metals and can be widely used in the preparation of organic fertilizers, biochar, etc., greatly improving the economic and social benefits of sludge treatment.

Belonging to the technical field of building materials, the invention discloses a preparation method of a durable anti-slip paint. The preparation method includes: by weight, mixing 10-20 parts of polyamide resin, 30-40 parts of acetone, 8-10 parts of a curing agent, 5-8 parts of a defoamer and 5-8 parts of silicon resin to obtain a No.1 mixed slurry; by weight, mixing 30-40 parts of epoxy resin,70-80 parts of a solvent, 5-8 parts of tung oil, 5-8 parts of pigment and 20-30 parts of mixed filler to obtain a No.2 mixed slurry; and by weight, mixing 20-30 parts of the No.1 mixed slurry, 60-80 parts of the No.2 mixed slurry and 30-40 parts of modified glass beads to obtain the durable anti-slip paint. The durable anti-slip paint provided by the invention has excellent wear resistance and slip resistance.

The invention provides a production process for refining soybean oil by an enzymic method, and relates to the technical field of soybean oil refining. The production process mainly comprises the following steps: filtering and separating, hydrating and degumming, enzymatically degumming, decoloring, purifying with ethanol and the like. The method overcomes the defects in the prior art, improves thedegumming rate of soybean crude oil, effectively reduces the impurity content in the crude oil, improves the quality of refined oil, and is suitable for popularization and application.

The invention provides a suction filtration / concentration method which comprises a sludge supply stage in which sludge is supplied to a filtration / concentration tank, a filtration / concentration stage in which the supplied sludge is concentrated by filtration within the filtration / concentration tank, a thick-sludge separation stage in which the thick sludge obtained by the filtration / concentration is separated from the outer surface of the filter cloth, and a thick-sludge discharge stage in which the separated thick sludge is discharged outside the filtration / concentration tank, wherein the filtration / concentration stage involves a step in which the thick sludge is adhered to the outer surface of the filter cloth by continuously performing suction at a given suction pressure that enables the thick sludge to retain the shape thereof even when separated in unconcentrated sludge, and the thick-sludge separation stage involves a step in which water is continuously and forcedly sent to the filter cloth via the filtration chamber over a given period to thereby separate, in the supplied unconcentrated sludge, the thick sludge (filter cake) adherent to the outer surface of the filter cloth. A suction filtration / concentration device is provided.

The invention discloses a dark blue photo-thermal crosslinking type thermal activation delayed fluorescence material, and a preparation method and application thereof, and belongs to the field of organic photoelectric materials and organic light-emitting diode devices. The dark blue photo-thermal crosslinking type thermal activation delayed fluorescence material is DV-2CzBN, and the structural formula of the dark blue photo-thermal crosslinking type thermal activation delayed fluorescence material is shown in the specification. The preparation method disclosed by the invention is simple; the temperature of a polymer formed by thermal crosslinking of the prepared material is low; the thermally crosslinked polymer film has good film-forming property; the preparation method has the advantagesof simple process, good stability, strong solvent corrosion resistance and the like, further spin coating of an electron transport material is facilitated, the utilization rate of the material is improved, the manufacturing cost of the device is reduced, and the full-wet organic light emitting diode device prepared based on the material has an electrogenerated spectrum wavelength of 448 nm and external quantum efficiency as high as 7.8%.

The invention discloses NISS (No Inner circumference with Stepfeed System) phosphorus and nitrogen removal automatic control device and process, belonging to the technical of deep biological phosphorus and nitrogen removal from sewage. A touch screen PLC (Programmable Logic Controller) automatic control cabinet of the device is connected with a water feed pump, an online COD (Chemical Oxygen Demand) analyzer and the like in the NISS phosphorus and nitrogen removal device, the feed water concentration and related parameters in the phosphorus and nitrogen removal system are effectively controller, and unmanned operation is realized in the treatment process. The carbon source in original water is utilized to the maximum extent by feeding water in two steps, so that the biological phosphorus and nitrogen removal of sewage can be realized without adding extra carbon sources, and the cost is reduced. Because online monitoring is adopted, the parameters of water feed quantity and the like can be automatically adjusted, so that the impact and load resistance of the entire system is improved. By automatically adjusting the current of a matched air blower for controlling the concentration of dissolved oxygen, the wastage of electrical energy under the condition of low water feed quantity is avoided, the operating cost of water plants is effectively lowered, and meanwhile, the effects of saving energy and reducing consumption are achieved.

A deep blue light thermally cross-linked thermally activated delayed fluorescent material and a preparation method and application thereof belong to the fields of organic optoelectronic materials and organic light-emitting diode devices. The deep blue light thermally cross-linked thermally activated delayed fluorescent material of the present invention is DV-2CzBN, and its structural formula is: The preparation method of the invention is simple, the temperature of the prepared material to be thermally cross-linked to form the polymer is low, and the thermally-crosslinked polymer film has the advantages of good film-forming performance, good stability and strong resistance to solvent erosion, etc., which is convenient for further electron transport. The spin coating of the material improves the utilization rate of the material and reduces the cost of device fabrication. The fully wet organic light emitting diode device based on the material has an electrospectral wavelength of 448 nm and an external quantum efficiency of up to 7.8%.

A wet flue gas desulfurization wastewater treatment system, which includes a high-efficiency precipitator (2), characterized in that the high-efficiency precipitator (2) is connected to the desulfurization wastewater water source, and its outlet is discharged from the high-efficiency precipitator through a pipeline The pump (25) and the pH adjustment tank (3) are connected, the pH adjustment tank (3) is connected to the softening reaction tank (7), the softening reaction tank (7) is connected to the settling tank (11), and the settling tank (11) It is connected with the tubular microfiltration membrane (15), and the tubular microfiltration membrane (15) is connected with the backwash water column (16); the backwash water column (16) is connected with the clean water tank (20); the membrane cleaning acid solution metering box (31 ) and the membrane cleaning lye metering box (32) are respectively connected with the cleaning water pump (33); the sludge concentrator (23) is connected with the membrane concentrated liquid discharge electric valve (22) through the pipeline, and the van filter press filtrate discharge electric valve (29), the outlet of the settling tank mud discharge pump (24) is connected. The invention has the characteristics of novel process, compact structure, stable operation, low investment and operation cost.

The invention discloses a carrier coating device of a capillary chromatography base pipe. The carrier coating device comprises an air inlet, an air inlet valve, a flow speed control valve and a copper pressure-resisting pipe which are in sealed connection in sequence through pipelines, wherein the pipeline between the flow speed control valve and the copper pressure-resisting pipe is further connected with an exhausting valve and a pressure gauge; the copper pressure-resisting pipe is provided with a cavity and a sealing cover; and the sealing cover is provided with a leading-in pipe for inserting the capillary chromatography base pipe. The invention further provides a method for coating the capillary chromatography base pipe with a carrier, so that ion liquid coating is well performed, and the coating effect of the ion liquid with middle and strong polarities is enhanced, and furthermore, the separation capability of fixed phases for some complicated samples is improved.

The invention belongs to the technical field of impermeable coatings, and discloses an impermeable coating with a heavy metal chelating function as well as a composition and application thereof. The preparation method comprises the following steps: carrying out a ring-opening reaction on active siloxane, a long-chain alkyl derivatives and a polyamine structure compound with an epoxy ring of poly(glyceryl methacrylate); and introducing a polyether modified siloxane chain Rn, a long-chain alkyl Rf and a polyamine structure Rm into a polymer chain, wherein the molar ratio of a polyepoxy main chain to the polyether modified siloxane chain Rn to the long-chain alkyl Rf to the polyamine chain Rm is (5-50): (1-10): (1-10): (1-10). The impermeable coating has a plurality of heavy metal binding sites and integrates multiple functions such as a heavy metal chelating function, a bonding function, a hydrophobic function and a film forming function. Micro-nano particles in the coating composition are wound and chemically bonded with a polymer film forming matter to form a stable hydrophobic impermeable polymer film, so that the use amount is small, the cost is low, and the heavy metal stabilizing effect is efficient and lasting.