4612 results about "Oil pollution" patented technology

The invention belongs to the field of surface treatment, and relates to a stainless steel cleaner. The cleaner comprises a nonionic surfactant, an anionic surfactant, a complexing agent, a degreasing agent and deionized water, wherein the degreasing agent is one of amide, and a mixture of amide and hydramine. An environmentally-friendly cleaner comprising the amide or the hydramine, a composite surfactant and the like removes grease under the alkalescent condition, and has good cleaning effect due to the permeation effect of the composite surfactant on the grease and an oxide layer. The invention also relates to a stainless steel cleaning method. The stainless steel cleaner and the stainless steel cleaning method are widely applied to the treatment of various stainless steel surfaces.

The invention provides a surface protection process used for long-time corrosion prevention and rust prevention. The process comprises the following process flow: sandblasting: performing surface blasting of brown steel shot on a valve body after heat treatment; pretreatment: cleaning to remove impurities such as oil stains, oxides, or water scales on the surface of the valve body by utilizing analkaline cleaning liquid; cleaning: rinsing chemical substances remaining on the surface of the valve body with clean water; plating solution preparation: preparing a plating solution according to a ratio of 5% to 14% of phosphorus content; preheating: putting the valve body in hot water to be preheated so that the temperature of a workpiece is close to the temperature of the plating solution; plating: putting the preheated workpiece into the plating solution for plating; treatment after plating: after the plating is completed, cleaning, air drying and storing the workpiece sequentially withinone hour. The surface protection process provided by the invention can delay the premature rust and corrosion of the valve body in the use process, and prolong the service life of the valve body to 20 to 30 hours.

The invention discloses a cleaning agent of windscreen for car, which is characterized by the following: allocating alcohol, surface activator, inhibitor, de-icing film former, dye and water; producing the cleaning agent. This invention can delay rubber age of rain scraper and extend durability of windscreen, which is an environment-friendly type cleaning agent.

The invention discloses a multipurpose high solid content paste washing agent for cleaning heavy oil stain on hard surfaces of tablewares, a cooking bench, tiles, ceramic utensils, a range hood and the like in a kitchen and a preparation method thereof. The multipurpose high solid content paste washing agent comprises the following ingredients: a nonionic surfactant, an anionic surfactant, an ampholytic surfactant, a humectant, a detergent auxiliary, carbonate, a forming agent and the like. The paste washing agent is obtained by the procedures of stirring, grinding and filling, and the like. The solid content of the paste washing agent is more than or equal to 70 percent. The paste washing agent occupies small volume and is convenient to carry. Packing materials are saved. The detergency is strong. After the paste washing agent is dissolved or dispersed in water, little foam is generated. The wetting power is strong. The paste washing agent has effects of rapidly dispersing, permeating, emulsifying and washing the oil stain and can be widely used for cleaning the oil stain on the hard surfaces of the tablewares, the cooking bench, the tiles, the ceramic utensils, the range hood and the like in the kitchen.

The invention discloses a mite killing bactericide and a preparation method of the mite killing bactericide. The mite killing bactericide is characterized in that the camphor tree air purification principle is adopted, the mite characteristics are combined, in the recipe, medicinal alcohol is used as main ingredients, and the first level (A) pure essential oil, herbal medicine and essence are added for preparation and synthesis. The preparation provided by the invention can be used for effectively preventing and killing mites on human and animal skin surface, various articles and indoor space, parasitic mites carrying various bacteria parasitized in human and animal bodies, and bacteria, the treatment and prevention effects on various diseases caused by the mites are realized, and the goal of protecting the health is reached. The mite killing bactericide and the preparation method have the advantages that the symptomatic treatment mode thinking method of the traditional medicine is broken, the occurrence of various diseases can be prevented by adopting the main path of preventing various bacteria carried by the mites from entering human or animal bodies, the matching is reasonable, no toxicity exists in the use process on human and animals, no secondary pollution is caused, no paste oil pollution is caused, colorlessness, dryness and comfort are realized, and the mite killing and the sterilization are efficient and fast.

The invention relates to an anti-oil and fire-retardant chlorinated polyethylene sheath material with good weather resistance and a preparation method thereof. The sheath material uses chlorinated polyethylene rubber as main raw material and adds chlorosulfonated polyethylene rubber, triallyl isocyanurate, 1,3-bis (tert-butyl peroxide isopropyl) benzene, trioctyl trimellitate, carbon black, antioxidant 1010, ultra-fine talc powder, antimony trioxide, and high-activity magnesium oxide R-150 according to ratios; the preparation method is as follows: at first, mixing part of the auxiliary agents, then mediating, internal mixing, open mixing, granulating and extruding are carried out on the mixture to form cables, thus the cables are obtained. In the formula, high temperature resistant plasticizer is utilized, various auxiliary agents with appropriate proportions are added into the formula, so that chlorinated polyethylene rubber cable material can reach a high temperature of 105 DEG C, and can be used at the lowest temperature of minus 50 DEG C. The sheath material has the advantages of good anti-aging property, excellent electrical insulation and mechanical property, environmental protection and high flame resistance, thereby being suitable for cold and oil-contaminated severe environment and transmission and distribution circuits of which the current-carrying capacities are large and the rated voltages are at or below 450 / 750V. Meanwhile, compared with traditional chloroprene rubber cable material, the sheath material has the characteristics of low cost, fast extruding speed and high output benefit.

The invention discloses an environment-friendly water-based cleaning agent which is characterized by comprising the following components in percentage by weight: 15-60% of antirust agent, 5-20% of surfactant, 0.1-0.5% of nonferrous metal corrosion inhibitor, 0-0.5% of bactericide and the balance of water. The environment-friendly water-based cleaning agent disclosed by the invention has the beneficial effects of no toxicity or phosphorus, excellent antirust performance, favorable inter-process antirust effect, wide application range, suitability for cleaning various metals including black metal, aluminum alloy and copper alloy, no corrosion to nonferrous metal, excellent cleaning capability for oil stain with higher viscosity, long service cycle and effective range, simplicity and practicability in use and maintenance, multiple functions for efficiently removing oil, preventing rusting and the like, no harm to body health and no adverse effect on the environment.

The invention relates to a fast scanning method of pipeline drawbacks and a non-destructive detection device, which is more particularly suitable for fast scanning and non-destructive detection of drawbacks of the pipelines with insulation. The invention is composed of a guided wave sensor, a transmitting module, a receiving module, a signal generating module, a power amplifying module, a signal processing module, an A / D conversion module and an built-in computer system. The invention is suitable for comprehensive detection of drawbacks of pipelines with different diameters, detection of long distance pipelines, and detection of pipelines in inaccessible places. The invention has the advantages of fast and large-scale detection ability without contact, high efficiency; overcoming a plurality of limitations of the conventional non-destructive detection method; overcoming the restriction conditions of oil pollution, fouling, bending or heat insulation protective layer, judging and locating the drawbacks of the pipelines, reducing the maintenance range, avoiding unnecessary disassembly and replacement, reducing the intensity of artificial detection, and saving the human and material resource. In addition, the invention can achieve on-line monitoring, and evaluate the health condition of the element or predicts the service life of the element.

The invention provides a preparation method and application of a super-hydrophobic / super-lipophilic material in oil-water separation field, involving the preparation method and application of an oil / water separation material. In the invention, the technical problems that the existing oil-water separation materials have low organic matter adsorption efficiency and high cost can be solved. The preparation method comprises the following steps of: treating a substrate with a roughening liquid, sensitizing liquid and an activating liquid in a proper order, then plating copper or zinc on the surface of the substrate, then immersing the substrate with the metal coating in an etching liquid for treatment to obtain the substrate with the rough metal layer on the surface, finally soaking the substrate in an organic solution of a fatty acid or a thiol and drying to obtain the super-hydrophobic / super-lipophilic material. The obtained super-hydrophobic / super-lipophilic material can be applied in oil-water separation, can absorb 1-40 g of organic matters per gram of the material, can be recycled repeatedly and can be used to control and treat oil pollution.

The invention relates to a vehicle mould quenching hardening process, which comprises the following steps: firstly detergent is used to remove oil and dust on the workpiece surface; secondly the Sio2 absorption coating material is sprayed uniformly on the vehicle mould surface in a pre-thickness of 0.02 mm to 0.05 mm with a brush; thirdly the Sio2 coating is naturally dried; fourthly a high power CO2 laser is applied to quickly scan the sprayed mould surface to achieve rapid surface heating and cooling. The laser power P is from 2,000W to 5,000W and the scan speed V is from 200 mm per min to 800 mm per min. The invention controls the surface uniform easily, improves the surface finish and dimensional accuracy of the stamping parts, greatly reduces the grinding time so as to improve the work efficiency and reduce the cost. In addition, the applied NC programming system can quench harden complex shaped moulds. The system is also fit for newly produced moulds without or with surface quenching process.

A method and apparatus for treating for disposal oil contaminated substrates, such as drill cuttings from drilling with an oil-based mud, by steam distillation. If necessary, the contaminated substrate 10 can be pretreated with an emulsion breaker 14. The contaminated substrate 10 can be treated with steam 16 in a first mixing still 12. The substrate can be optionally treated with a second steam source 20 in a second mixing still 18. The steam provides heat to vaporize the oil, moisture to treat the substrate and water to the reaction mixture. Recoverable constituents in the vapor can be condensed in a vapor collection system 24. The treated substrate 22 is essentially free of oil and can have a controlled water content. The process exhibits low energy consumption, rapid treatment, compact equipment and a high degree of process control.

The invention relates to a surface treatment method of aluminum alloy, which comprises the following steps of: pre-treating: removing oil stains on the aluminum alloy surface by adopting an alkali degreasing solution; alkali washing: purifying the aluminum alloy surface at 50-60 DEG C by adopting alkali wash to remove a natural oxide film on the aluminum alloy surface; acid pickling: treating the aluminum alloy surface at room temperature for 1-5 minutes by adopting a pickling solution to further remove residual spots left on the aluminum alloy surface after alkali washing; and chemically plating Ni-P: forming a Ni-P plating layer on the aluminum alloy surface by adopting a pre-prepared chemical plating Ni solution with pH value of 5-6.5 at 85-90 DEG C for 90-240 minutes. By adopting a chemical plating Ni-P layer process to form a uniform favorable plating layer with good acid resistance, alkali resistance and salt resistance outside an aluminum alloy shell, the invention avoids the phenomena of uneven thickness of a protective layer and spraying missing on a complex structure part, and remarkably improves the anticorrosion performance of the aluminum alloy.

This invention relates to selection and application of thermophil denitriding Bacillales,of which conservation number is CGMCC-1228. Initial strain is from water of oil field. The strain is obtained by selection, inoculation, and domestication with good thermal stability. It belongs to soil Bacillales and can be used in fermented industry, which needs thermally stable enzyme. It grows well in the oil field and can degrade paraffin and decrease viscosity to improve liquidity. All of this can increase recovery and carriage efficiently. It can be used to control pollution and prepare surfactant.

The present invention includes bainitic steel doctor blades, bainitic steel coating blades, bainitic steel creping blades and bainitic steel rule die knives used in gravure printing, flexographic printing, paper making, die cutting of materials including paper, plastic, foam, leather, etc. Other uses include printing processes such as pad printing and electrostatic printing. The invention also includes an improved method for producing bainitic steel strip. The present invention is accomplished by using bainitic steel components that exhibit superior straightness and wear properties and are bendable around small radii. The process of the present invention comprises the steps of annealing a carbon steel resulting in a microstructure of the steel having a dispersion of carbides in a ferritic matrix; cold rolling the annealed steel; cleaning the cold rolled steel to remove oil and dirt; bridle braking the cleaned steel to increase strip tension; austenitizing the steel; submersing the austenitized steel into a quenchant; removing excess quenchant; and isothermally transforming the austenitized steel into bainite. The present process of the invention also includes the use of turn rolls that are housed in an assembly containing salt and / or tin.

The invention discloses a preparation method of a foam electrode for water electrolysis, which belongs to the technical field of water electrolysis. Foam nickel is selected as the base material of the electrode material; oil stains on the surface of the foam nickel are removed so that the surface is clean; the foam nickel is soaked in diluted acid solution, and the surface of the foam nickel is activated; pure water is used to flush the activated foam nickel, and the foam nickel is quickly soaked into an electrodeposition tank as a cathode for electrodeposition; the active surface is prepared; the foam electrode with the active surface is thoroughly cleaned, dried and thermally treated; and the thermally treated foam material is cut to prepare the electrode material. The high-activity foam electrode material prepared through the method provided by the invention can be used for the electrode material in the electrolysis hydrogen production industry, can reduce hydrogen precipitation overpotential in the electrolysis process, reduce energy consumption, and improve the production efficiency.

The invention discloses an environment-friendly aluminum cleaning agent and a preparation method thereof. The cleaning agent is composed of the following components in percentage by weight: 20% to 25% of inorganic acid, 10% to 20% of organic acid, 10% to 18% of surfactant, 8% to 15% of osmotic agent, 6% to 18% of emulsifier, 2% to 8% of antifoaming agent, 5% to 8% of complexing agent, and 25% to 30% of water. In the provided cleaning agent, the using amount of hydrochloric acid, sulfuric acid, and nitric acid is reduced, the aluminum parts are washed by medium-strong acids and organic acids, and the cleaning agent has a very good oil stain and rust removing ability. The cleaning agent is acidic, the pH value of the cleaning agent is 2.1 to 5.6, and the cleaning agent can well remove the oxide scale on the aluminum surface. Because the acidity of the organic acids is weak, the over-corrosion on work tools and acid volatilization, which can harm the workers' health, are effectively avoided, and the cleaning effect is not influenced at the same time. Moreover the adopted organic acids are easy to decompose, and thus the cleaning agent is environment-friendly.

The invention relates to laser welding and discloses a process method for welding aluminum and aluminum alloy material by laser. The process method comprises steps of: (1) selecting an Nd:YAG laser with high beam quality and high energy density; (2) adopting double-beam laser to weld aluminum and aluminum alloy material, wherein the distance between the two beams is 0.6-1.0 mm, and the energy ratio of the two beams is larger than 1:1; (3) surface treatment of a material to be welded: removing greasy dirt and dust with an organic solvent and removing an oxidation film by mechanical cleaning and / or chemical cleaning; and (4) utilizing the two-beam laser to weld the aluminum and the aluminum alloy material. A needle body, a sleeve and a lead of the invention are manufactured into a whole; therefore, the invention solves adaptability of the laser welding to assembly precision, enhances the stability of welding process and improves welding line quality.

The invention relates to an ocean spilt oil film thickness hyperspectral remote sensing estimation method based on a parameter lookup table and belongs to the field of ocean environment monitoring research. The method includes the steps of obtaining and pre-processing standard oil film thickness continuous change hyperspectral data by designing a simulation experiment; obtaining and pre-processing ocean spilt oil satellite remote sensing data; resampling a standard oil film spectrum based on a satellite sensor performance index; normalizing spectral reflectivity; building an oil film thickness optical calculating model; building an attenuation parameter lookup table; normalizing the reflectivity of satellite data and conducting mask treatment; inquiring and building an optimal wave band of the satellite data and relevant parameters; and calculating the oil film thickness in the satellite data through the parameter lookup table and the optical model. Compared with a traditional observation means, by means of the ocean spilt oil film thickness hyperspectral remote sensing estimation method, field workload is less, the thickness of the spilt oil film can be quantized, the thickness of an oil film in a spilt oil area can be calculated without entering an ocean spilt oil pollution area, and requirements of ocean split oil emergency monitoring and evaluation can be met.

The invention relates to a method for treating oil stain and flue dust through a flue gas desulfurization system. The method comprises that: 1) raw flue gas containing oil stain and / or flue dust enters an absorption tower, oil stain and flue dust are scrubbed and enter an absorption liquid, and the purified flue gas is discharged from the absorption tower top; 2) the absorption liquid containing the oil stain and the flue dust is discharged into a maintenance pool; 3) the absorption liquid containing the oil stain and the flue dust is conveyed to an oil dust separator through a maintenance pump to carry out oil dust separation, and then is conveyed to a filtration system, wherein the absorption liquid directly enters the filtration system when the absorption liquid only contains the flue dust, and the absorption liquid is firstly conveyed to the oil dust separator when the absorption liquid contains the oil stain; 4) the absorption liquid is subjected to oil stain and flue dust separation in the oil dust separator, wherein the oil stain has a low density so as to float on the surface, the oil stain residue is collected into an oil stain pool through an oil decanter on the oil dust separator, and the flue dust has a high density so as to sink on the bottom of the oil dust separator; and 5) the high flue dust content absorption liquid on the bottom of the oil dust separator is conveyed to the filtration system through a filtration feeding pump, the clear liquid returns to the absorption tower after filtration to be subjected to desulfurization absorption, and the filtration residue is collected in a flue dust residue pool.

An electromagnetic valve test platform comprises an electromagnetic valve performance test test-bed and a measuring and control device. The electromagnetic valve performance test test-bed mainly comprises a hydraulic circuit and a control cavity. The hydraulic circuit is connected with the electromagnetic valve to be tested by virtue of an oil path, and the electromagnetic valve to be tested is connected with an interface of the control cavity by virtue of the oil path. The measuring and control device comprises a LabVIEW test platform, a data collection card, a plurality of sensors and a microcomputer. The microcomputer is connected with the data collection card by virtue of a wiring harness, and then the data collection card is connected with each sensor by virtue of a circuit. The electromagnetic valve test platform has the characteristics of high integration level, strong reliability, high intellectualization level and the like, and can be used for performing electromagnetic valve flow property and response property test, anti-vibration and anti-oil pollution capacity test and reliability test, and the development period of the electromagnetic valve is shortened.

A dirt resistant anti-dazzle film comprises a transparent supporter and an anti-dazzle hard coating. The component and content of the anti-dazzle hard coating are as follows when counted by weight: 15-85 parts of ultraviolet solidified resin; 1-15 parts of photoinitiator; 0.1-10 parts of organsilicon modified polyacrylate; 0.5-10 parts of anti-dazzle particles, and 15-80 parts of dissolvent. The scratchproof anti-dazzle film can effectively inhibit the adhesion of dirt of dust, oil dust and the like on the surface of the film, and furthermore the adhered dirt can be easily erased. In particular the dirt resistance is permanent, and at the same time the anti-dazzle property, scratch resistance and scratchproof quality can be maintained.

The invention relates to a microbial agent for repairing petroleum-polluted saline alkali soil and a preparation method thereof, and belongs to the technical field of resource environment. According to a principle of microbial ecology, microbial community is extracted and screened from soils with high salt and alkali and high petroleum pollution to prepare the microbial agent, wherein obligate petroleum degrading bacteria can be sphingolipid bacteria, comamonas, chitin autophagy bacteria and bacillus. According to culture medium and soil environment experiments, the microbial agent can guarantee that the extracted microorganism can be survived in the soils with the salt content of 5,000mg / kg, and meanwhile, the degradation capability to the polluted soils with the petroleum content of 10-50g / kg can reach 80%. The microbial agent has the advantages of simple process, rich microorganisms, obvious dominant bacteria, good stability and capability of facilitating obligate petroleum degrading bacteria to adapt to a new pollution environment, increasing and improving the micro-ecological environment quality of the soils and avoiding secondary pollution to the environment, and can obviously improve the degradation efficiency of petroleum hydrocarbon in the saline alkali soil.

The invention provides a deep blockage removal and injection increase method for a water injection well of a medium-and-high-permeability sandstone reservoir. The method mainly solves the problems of oil pollution, deep blockage removal of a ground layer and the like of a sewage injection well, which can not be solved in the existing conventional acidification method. In the method, the slug type injection technology of "washing-clearing-blockage removing-stabilizing" is adopted; and the injection increase effect can be improved and the injection increase effective date can be prolonged. The method comprises the following steps: during construction, firstly, the well is backwashed at high displacement, and impurities near a well bore and a bore hole are washed; secondly, organic blockages near an oil layer are washed; then, organic and inorganic blockages in the areas near the well and the deep part of the oil layer are removed in the mode of multistage injection and multiple acid liquid systems, so that the seepage capability is improved; and finally, stabilizing treatment is adopted for prolonging the injection increase effective date. Through the adoption of the slug type injection technology, blockage damage is removed in batches, and substrate treatment, scale prevention treatment and scale inhibition treatment are performed so that the injection increase effect is improved, the injection increase effective date is prolonged and a better blockage removal effect is achieved.

The invention discloses a laser cladding wear-resisting and heat fatigue-resisting alloy coating method for manufacturing a hot rolled seamless steel tube rolling mill retained mandrel, which is characterized by comprising the following steps: carrying out surface cleaning on greasy dirt and rustyscale of a retained mandrel; selecting cobalt-base alloy powder; adopting laser equipment and an automatic powder delivering device; carrying out laser cladding processing on the surface of the retained mandrel so as to form a 0.2-2mm coating with high-temperature oxidation resistance, heat fatigue resistance and heat abrasion resistance; and carrying out high temperature tempering processing on the retained mandrel after being subject to the laser cladding processing so as to decrease the coating after being subject to the laser cladding processing and the residual stress after the gene matrix is transformed. The laser cladding alloy coating of the invention is even and compact, has the characteristics of high production efficiency, low energy consumption, small machining allowance of a cladding layer, high yield and low comprehensive cost and the like.

The invention aims at providing a device for washing and desulfurating the waste gas of a marine diesel engine. The device comprises an absorption tower, a fresh water tank, an NaOH solution storage box, a circulating liquid treatment box and a waste liquid treatment box, wherein the front end of an exhaust pipe of the diesel engine is communicated with the side at the lower part of an absorption tower by a waste gas inlet pipeline; the tail end of the exhaust pipe of the diesel engine is communicated with the top of the absorption tower by a waste gas outlet pipeline; the fresh water tank is communicated with the absorption tower, the waste liquid treatment box and the circulating liquid treatment box respectively; the NaOH solution storage box is communicated with the circulating liquid treatment box and the waste liquid treatment box respectively; the lower end of the absorption tower is communicated with the circulating liquid treatment box by a circulating liquid pipeline; the circulating liquid treatment box is communicated with the absorption tower respectively by a high-temperature spray pipeline and a low-temperature spray pipeline; the circulating liquid treatment box is also communicated with the waste liquid treatment box by a waste liquid discharge pipeline; the waste liquid treatment box is communicated with an oil stain storage box, a waste liquid storage box and an outside environment respectively; the waste liquid treatment box and the waste liquid storage box are respectively communicated with the waste liquid discharge pipeline. The device is in accordance with the new standard of marine oil sulfur content required by international maritime organization (IMO).

The process of preparing photocatalytic self-cleaning enamel includes the following steps: 1. preparing enamel clinker with enamel material quartz, feldspar, borax, etc, through mixing, smelting in a crucible, water quenching and stoving; 2. mixing enamel clinker with clay, dielectric and deionized water, grinding, sieving and stoving to form the enamel; 3. derusting and degreasing steel plate or iron casting, stoving, coating the enamel, stoving and firing to form enameled plate; and 4. soaking the enameled plate in titania colloid solution, vertically drawing, stoving and sintering to form enameled plate with titania film. The process is simple and low in cost, and the prepared self-cleaning enamel material has excellent photocatalytic performance and high chemical stability.

The invention discloses a semisynthesis cutting fluid for magnesium alloy. According to the invention, the hidden danger of fire hazard in the process of magnesium alloy processing is totally avoided by using an environment-friendly water-soluble system; excellent reasonable proportioning of additives and combined application of corrosion inhibitors effectively prevent the surface of processed magnesium alloy from corrosion and blackening; designing of a low foam type formula enables generation of foam in the cutting fluid for the magnesium alloy to be totally inhibited; application of a delicate low-foam surfactant enables the problem of difficult cleaning of workpiece surface due to excessive oil stains to be overcome; application of an additive with resistance to hard water enables hard water-resistance of the fluid to be effectively improved, the fluid has hard water-resistance of 15000 ppm, allowing the service life of the fluid to be prolonged, all the indexes of the fluid reach or exceed relevant indexes in GB6144-2010, anti-rust performance lasts for more than 72 h per sheet, and the life cycle of the fluid is more than 8 months, 3 to 6 times the life cycle of magnesium alloy cutting fluid on the market; and reasonable design of an environment-friendly formula enables the problems of difficulty in treating waste liquid and the like to be effectively overcome.

The present invention relates to an organic coating material with super-self-cleaning function for external wall and its preparation method. Said invention selects inorganic pigment filling material with a certain size and form, hydrophobic adjuvant with low surface tension and nano titanium dioxide photocatalyst, and utilizes the properly-proportional mixing of emulsion base material, pigment filling material and adjuvant to obtain the invented product. Its preparation method is simple and low in cost.

The invention provides a profile control method for a gas channeling passage of a fireflooding gas-injection well and a pipe column for the profile control method. The profile control method includes the following steps that air is injected into the gas-injection well within a preset time, so that the gas-injection well is communicated with a producing well used for oil extraction; oily sludge is injected into the gas-injection well, and profile control is carried out over an oil layer with large gas suction amount, so that clay in the oily sludge plugs a gas channeling hole way in the gas-injection well, and oil in the oily sludge assists in burning of the oil layer; and finally, the gas-injection well is subject to gas injection and ignition, so that the clay in the oily sludge is sintered while the gas-injection well conducts fireflooding on the oil layer, then an artificial borehole wall attached to the outside of the gas-injection well is formed, oil in the oily sludge burns to generate gas, and a gas runner is formed in the artificial borehole wall while the artificial borehole wall is formed. By means of the profile control method for the gas channeling passage of the fireflooding gas-injection well and the pipe column for the profile control method, the gas channeling passage of a high-pervious bed of the fireflooding gas-injection well can be plugged; and meanwhile, in the process that the oil layer is subject to fireflooding, the well wall of the gas-injection well is strengthened, and hole-wall collapsing is prevented.

The invention discloses an epoxy terrace materials consisting of a polyurethane leather layer, a fibre glass cloth layer which is mutually bonded with the polyurethane leather layer, and a terrace coating layer formed by coating and distributing the terrace paint on the surface of the fibre glass cloth layer. The terrace material not only inherits the excellent physicochemical properties of epoxy resin, such as wear resistance, scouring resistance, oil stain resistance, aging resistance, strong chemical resistance, extremely strong adhesive force and other characteristics. By adopting fibre glass as the material skeleton, the epoxy terrace material further strengthens the impact resistance and tensile strength, and belongs to the high-strength composite material; and compared with the traditional coating materials, the epoxy terrace material is more durable, has longer service life, and easier installation and construction.