Method for enhancing efficiency of hydraulic turbine plant

FIELD: operation of hydraulic turbine plants.

SUBSTANCE: proposed method includes cleaning surfaces from crust, preliminary treatment and application of coat made from polymer material, epoxy or polyurethane, for example at thickness of 30% of maximum depth of pits at isolated located of pits and 60% when pits adjoin one another. As a result, efficiency is increased by 1.5 to 2.5%.

EFFECT: enhanced efficiency of hydraulic turbine plant.

3 cl, 3 dwg


The invention relates to the field of operation of the hydraulic systems and can be used to increase the coefficient of performance (efficiency) installations, spent the long term.

For the assessment of novelty and technical level of the claimed solution consider a number known to the applicant of technical means for a similar purpose, characterized by the presence of signs similar to the essential features of the invention.

From published and made generally accessible information include the following analogues of the invention.

One of the effective ways to increase the efficiency of turbine installations, spent a long time, is to replace the impeller turbines on a new wheel, designed, engineered and manufactured using advanced technology. This method allows to increase the efficiency of turbine units at a value of from 1 to 6% depending on the service life of the impeller and wear his blades.

There is also known a method of increasing the efficiency of turbine installation, consisting in the replacement of the guide vanes of the turbine. It can improve the efficiency of turbine installation on the order of 0.5 to 1%.

Both of the described method with high efficiency require a very high cost and the implementation. On 1 kW of additional power obtained by increasing efficiency in the implementation of these methods requires costs equal to ˜10-50% of the cost of 1 kW of installed capacity of the new power plant.

A device for hydrodynamic cleaning of surfaces from deposits, see A.S. USSR №1636072 containing nozzle nozzle-cavitator having a Central flow channel, forming a cavitating jet of fluid. The nozzle channel-cavitator creates tangible hydrodynamic resistance pumped on it due to fluid turbulent friction on its surface. This reduces the efficiency and performance of cleaning the surface due to the unnecessary loss of pump capacity and the cavitating liquid jet.

The known method of increasing the efficiency of turbine installation, which consists in blasting or sanding surfaces of flow and subsequent coating them with varnish and paint materials, film thickness which does not exceed 100 MK. This method can be implemented using well-known method of surface treatment products, including the operation of cleaning the surface from corrosion and biological growths with the subsequent jet-abrasive surface water-air mixture, filled with fine particles, resulting in removing the defective layer is of atalla and spend finishing operation etching or lightening receiving surface texture of arbitrary type to a specific value of roughness, see RF patent №2152865.

Comparative analysis of energy losses caused by the change in the quality of the surfaces of the flow part of the hydraulic installation with radial-axial turbine, worked 40-50 years, and installation, which made sandblasting and painting, coating materials, shows that this method allows to increase efficiency of 0.8 to 1.0%, while the overall reduction efficiency for 30-50 years of operation is 1.5-2.5%. Thus, this known method allows you to recover not more than half of the reduction efficiency of turbine installation, due to the deterioration of the surfaces during operation.

Solved by the invention technical problem consists in increasing the efficiency of turbine installation that has worked long term, to its original design level. This task for modern energy is very important, as it ensures the preservation of the health of hydropower plants, the restoration of physical depreciation of fixed assets by improving repair service recovery elements of hydraulic structures with guaranteed renewal of their life, reducing the cost of the repair, maintenance and operation.

The essence of the invention as technical the CSOs solution is expressed by the following set of essential features, sufficient to achieve provided by the invention a technical result.

A method of improving efficiency of turbine installation, including clearance from corrosion and biological growths, appropriate pre-treatment and coating of protective composition streamlined water surface water turbine installation, characterized by the fact that the protective composition is a film-forming polymeric material, and the application of this material is carried out to ensure the film thickness in the range from 30 to 60% of the maximum depth of ulcerative lesions on the cleaned and prepared for coating the surface.

This is a set of essential features of the invention, providing technical result in all cases to which the requested amount of legal protection.

In addition, the claimed solution has a number of features that characterize the invention, in some cases, its performance, or special conditions of use, namely:

as a film-forming polymeric material use epoxy material;

as a film-forming polymeric material used polyurethane material.

The applicant has not identified the sources containing information on technical R the temptations, the combination of features which coincide with the set of distinctive features of the claimed invention, which allows to conclude that they meet the condition of "novelty".

Individual distinguishing features of the claimed invention, such as a protective structure known from the prior art, however, applicant is not aware of any publication that would contain information about the impact of these distinctive features of invention achieved by the invention of the above-mentioned technical result.

In this regard, according to the applicant, it is possible to draw a conclusion on the conformity of the proposed technical solution the condition of "inventive step".

The invention is illustrated by drawings, where figure 1 shows a section through the hydraulic installation figure 2 - typical type of damaged surfaces in the form of isolated deep ulcerative lesions, figure 3 - typical type of damaged surfaces in the form adjacent to each other ulcerative lesions.

Streamlined water surface pressure conduit 1, a spiral chamber 2, a stator 3, the guide vane 4, the suction pipe 5 and is directed to the impeller 6 of the cover surface of the turbine 7 and the base ring 8 after long-term operation within 30-50 years have corrosion damage and biological growths that form in with the overall terrain with roughness from tenths of a millimeter to several millimeters.

The method is implemented as follows.

Compared with the surfaces of the new turbine installation, irregularities which do not exceed 0,03-0,05 mm, surface corrosion ulcerative lesions and biological growths cause additional energy losses in turbine installation comprising from 1.5 to 2.5% of the energy flow, and the same reduction efficiency of the installation.

Streamlined surface water turbine installation pre-cleaned of corrosion and biological growths by sandblasting, and in hard to reach places with the method of cleaning the grinder with an abrasive stone.

After that, the prepared surfaces apply a protective structure in the form of a film-forming polymeric material, such as epoxy or polyurethane.

As a film-forming polymeric material based on epoxy resin can be used primers Hempadur Fast Dry 15560, HEMPEL 1270, HEMPEL 12430, and enamel Hempadur 15130, HEMPEL 60430. For present purposes, also suitable vinyl-epoxy primer Vinicor-061 with hardener AF-2 or DTF-2 and enamel CS-436 or EP-A with hardener based on polyethylenepolyamine.

As a film-forming polymeric material based on polyurethane can be used in the compositions of the firm "AGRO" (Austria), representing holodnokatanyy the present polymers on the basis of polysulfide rubber, wet-vulcanizing silicone rubber and polyurethane curing at normal temperature. For present purposes, also suitable polyurethane compositions Matalin 580" company "Smart Systems GmbH (Germany).

Film-forming polymeric material allows to obtain the desired film thickness, and the application of this material is carried out to ensure the film thickness in the range from 30 to 60% of the maximum depth of ulcerative lesions on the cleaned and prepared for coating the surface

Remove growths on the surface pre-treatment and coating of polymeric material with a thickness from 30% of the maximum depth of ulcer damage to the surface, when the isolated location of the ulcer, up to 60%, in the case of the junction pits to each other, allows you to completely eliminate the loss of energy as the quality of the surface coating of such thickness is not less than the quality of the surfaces of the new turbine installation.

This is achieved by increasing efficiency on the order of 1.5 to 2.5%.

Preliminary calculations showed that the cost of 1 kW power increase obtained by increasing the efficiency of the claimed method, is from 2 to 5% of the cost of 1 kW of installed capacity of the new power plant.

The industrial applicability of the claimed technical solution is confirmed by the well-known and is written in the application means and methods, with the possible implementation of the invention, as it is characterized in the claims. The claimed method may be implemented using known technologies and technical means, which determines, according to the applicant, the condition of "industrial applicability".

Using the inventive method may work on the restoration of the surfaces of the impeller turbines, camera impeller turbines, guide vanes, and other elements of the hydraulic installations.

1. A method of improving efficiency of turbine installation, including clearance from corrosion and biological growths, appropriate pre-treatment and coating of protective composition streamlined water surface water turbine installation, characterized in that the protective composition is a film-forming polymeric material, and the application of this material is carried out to ensure the film thickness in the range from 30 to 60% of the maximum depth of ulcerative lesions on the cleaned and prepared for coating the surface.

2. The method according to claim 1, characterized in that as a film-forming polymeric material using an epoxy material.

3. The method according to claim 1, characterized in that the quality of film-forming polymeric material used polyurethane material.


Same patents:

FIELD: turbines using kinetic energy of liquid flow.

SUBSTANCE: proposed turbine has turbine case , stay ring with cascade of stay vanes, wicket-gate mechanism with cascade of adjustable vanes, operating element with cascade of flange-mounted blades and drive shaft coupled with electric generator step-up gear, operating element chamber, and draft tube. It is also provided with straightening mechanism that has cascade of vanes, chain transmission that has sprockets and shafts; external and internal rims are made in cross-sectional areas in the form of ovals. Cascade of blades is made in the form of caterpillar cascade. Operating element blades are cylindrical in shape and hinge-joined through chain transmission whose drive sprocket is coupled with drive shaft. Flanges of operating element blades are provided with supporting rollers mounted in fixed supports and joined with chain transmission shafts at distances of two adjacent operating-mechanism blades; guides are made in the form of oval junctions joined with turbine internal rim in vicinity of their abutting against butt-ends of flanges carrying operating element blades.

EFFECT: enhanced turbine efficiency.

1 cl, 4 dwg

The invention relates to engineering and can be used for leveling the surface temperature profiles of the lower and upper dams hydroelectric power station

Hydroelectric // 2067689

FIELD: anti-corrosion materials, pigments.

SUBSTANCE: invention describes an anti-corrosion pigment comprising alkaline-earth element and aluminum tertiary phosphate of the general formula: AExAly(PO4)z wherein AE means alkaline-earth element; x, y and z mean mass of ions AE+2, Al+3, PO4-3 and wherein the ratio x:y:z = (29.8-53.8):(2.7-4.1):(43.5-66.1), respectively, in wt.-%. In the claimed percent ratios of ionic masses the proposed pigment shows the higher degree of dispersion and covers made of its base have higher corrosion resistance.

EFFECT: improved and valuable properties of pigment.

2 tbl, 6 ex

FIELD: paint-vehicle materials for protection and ornamental decoration of metal surfaces.

SUBSTANCE: claimed composition contains (mass %): polyphenylsiloxane 10.8-20.4; acrylate polymer 3.0-8.0; heat resistant pigment 10.0-28.0; wollastonite or mixture of wollastonite and potassium alumosilicate in ratio of 29.4-100:0-70.6 as filler 3.0-15.0; bentonite clays as rheological additive 0.5-2.0; and balance: organic solvent. Additionally composition contains alkyd resin 1.5-7.5 mass % and optionally micronized wax up to 5 mass %.

EFFECT: coating of improved physical, mechanical and preventing properties.

2 cl, 2 tbl

FIELD: corrosion protection.

SUBSTANCE: invention relates to preparation of composition to protect against corrosion basic structural materials used utilized in oil and gas storage tanks, pipelines, and bridge constructions. Composition contains, wt %: polymeric film-forming substance 46-58, naturally occurring fine-scale α-ferrous oxide variety 12-30, organosilicon hardener 12-17, thiocol 7-10, and synthetic silica (Aerosil A-175). Polymeric film-forming substance is solution of epoxide resin E-41 in xylene and acetone. Naturally occurring fine-scale α-ferrous oxide variety is specularite originated from Altai deposit "Rudny Log" with contents of silica, alumina, magnesium oxide, and calcium oxide no higher than 2,5, 1.8, 0.2, and 0.3, respectively, and 85-95% α-ferrous oxide (Fe2O3). Fractional composition of specularite: fraction above 70 μm up to 2%, below 40 μm up to 3% and 40-70 μm - the balance. Organosilicon hardener is an organosilicon amine derivative.

EFFECT: increased viscosity of composition and reduced number of coating layers at the same principal performance characteristics and prolonged lifetime.

2 tbl, 6 ex

FIELD: composition for corrosion protection of basic constructional materials (steel, concrete).

SUBSTANCE: claimed composition contains (mass %): polymeric film-forming substance 40-52; natural fine-grain iron alpha-oxide 11-27; organosilicon curing agent 1`2-17; thiocol 7-10; synthetic silica 3-5; strontium chromate 7-9. Solution of epoxy resin in xylene and acetone is used as polymeric film-forming substance. Natural fine-grain iron alpha-oxide contains (mass %): silica, aluminum oxide, magnesium oxide, and calcium oxide not more than 2.5; 1.8, 0.2, and 0.3, respectively and Fe2O3 85-95 %. As organosilicon curing agent organosilicon amine derivatives are used.

EFFECT: coating of increased fuel resistant and durability in high aggressive medium, containing, in particular, fuel with water impurity.

2 tbl, 6 ex

FIELD: composition for corrosion protection of basic constructional materials (steel, concrete).

SUBSTANCE: according to the first variant claimed composition contains (mass %): epoxyorganosilicon oligomer as polymeric film-forming substance 16.0-18.0; butadieneacrylonitrile carboxylate rubber 34.0-36.0; natural fine-grain iron alpha-oxide 24.0-27.0; organosilicon curing agent such as organosilicon amine derivative 12.0-15.0; xylene as solvent 3.3-5.0; microtalc (talcone) 3.0-4.0; synthetic silica 0.7-1.0. Natural fine-grain iron alpha-oxide has low content of silica, aluminum oxide, magnesium oxide, and calcium oxide and not less than 60 mass % of Fe2O3. According to the second variant claimed composition contains (mass %): epoxydianic resin as polymeric film-forming substance 14.0-16.0; butadieneacrylonitrile carboxylate rubber 29.0-31.0; natural fine-grain iron alpha-oxide 21.0-31.0; organosilicon curing agent such as organosilicon amine derivative 24.0-25.3; xylene as solvent 3.0-4.0; microtalc (talcone) 3.0-4.0; synthetic silica 0.7-1.0.

EFFECT: composition with increased content of non-volatile components; coating with increased thickness of single layer.

2 cl, 4 tbl, 12 ex

FIELD: corrosion protection.

SUBSTANCE: invention relates to anticorrosion compositions for metallic parts, in particular to utilization of MoO3 as agent enhancing anticorrosive properties of composition for anticorrosion coating based on dispersed metal, containing zinc of zinc alloy in aqueous phase (30-60% water in dispersion) and containing binding agent. Compositions for anticorrosion coating of metallic parts are disclosed containing such corrosion inhibitor (MoO3); at least one dispersed metal selected from group composed of zinc, aluminum, chromium, manganese, nickel, titanium, and alloys thereof; organic solvent; thickening agent; silane-based binder; optionally sodium, potassium, or lithium silicate; and water in amount from 30 to 60% by weight. Disclosed are also anticorrosion coating and metallic substrate with deposited anticorrosion coating prepared from above-defined composition.

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22 cl, 2 dwg, 6 tbl, 3 ex

FIELD: chemistry of polymers.

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EFFECT: improved and valuable properties of systems.

74 cl, 1 tbl

Polymer composition // 2277561

FIELD: polymer materials.

SUBSTANCE: invention concerns polymer composition providing reliability and long period of running repaired sections of pipelines comparable to those in defectless pipelines. Composition is constituted by, wt parts: epoxide dian resin 100; aliphatic epoxide resin 35-75; oligoether-cyclocarbonates with weight portion of cyclocarbonate groups 18 to 29, 5-40; powder filler 40-200, amine hardener 55-90, and plasticizer 7-30, said powder filler being a mixture of mineral silicate-containing powders with metallic powders at ratio between 100:4 and 100:20 and said amine hardener being a mixture of (A) and (E) products at ratio between 80:20 and 60:40. Product (A) is prepared by reacting amine (B) with salicylic acid (B) and plasticizer (D), which is oxygen-containing compound from polyol group, weight ratio (B):(C):(D) ranging from 72:1.5:26.5 to 40;9;51. Product (E) is prepared via condensation of phenol, formaldehyde, and aliphatic amine. Invention improves physico-mechanical properties of polymer composition cured at temperatures 4-5°C and 20°C such as bend strength, tensile strength, and elongation, increases adhesion for steel, reduces shrinkage, viscosity, and temperature of exothermic reaction, and also increases time of the beginning of exothermic reaction.

EFFECT: improved performance characteristics of polymer composition.

2 tbl, 9 ex

FIELD: corrosion protection.

SUBSTANCE: invention is designed for use in oil and gas industry, mechanical engineering, in particular to protect internal surfaces of steel fuel tanks and mains, wherein all kinds of petroleum products or various organic solvents can be present. Composition contains 55-35 vol % pre-polymerized polyurethane based on tolylenediisocyanate and diethylene glycol, 35-55 vol % polytrifluorochloroethylene, and 5-10 vol % aluminum powder with particle size no larger than 20 μm.

EFFECT: achieved heat resistance of anticorrosive coating within a working temperature range ±50°C and protective properties of coating when surfaces are treated with steam at 150°C and pressure up to 6 atm.

2 ex

FIELD: polymers, anticorrosive materials.

SUBSTANCE: invention relates to polymeric compositions used for protection against corrosion. Polymeric composition comprises epoxidated rubber or dimethylsiloxane rubber as a polymeric binding agent, polyamide resin or polymethylsilazane as a nitrogen-containing hardening agent, talc or mica as a filling agent, aerosil as a thixotropic additive and electrolytic nickel powder or powder of the alloy system Al-Fe-Cu as a current-conducting additive. The composition can comprise additionally epoxy resin in the amount 10-20 mass. p. Invention provides preparing the composition showing high protective properties in all-climate conditions that allows increasing exploitation period of articles. Invention can be used for filling the internal lap cavity (before welding) formed in the pointed arc welding of metals and alloys.

EFFECT: improved and valuable properties of composition.

7 cl, 2 tbl

Heat protective dye // 2245350

FIELD: chemical industry, paint-vehicle systems, in particular heat protective dyes.

SUBSTANCE: claimed dye contains ceramic and corundum microspheres; resins, selected from group including silicone resin, polyesterepoxy resin, acrylic resin dispersions as binder; pigment; and aluminum powder as deflector. Such composition provides reduced heat loss into environment. Obtained dyes have thermal gradient, improved heat-retention properties and strength, and useful in corrosion and heat-loss protection of building construction, transport, gas and oil lines, heating systems, etc.

EFFECT: easier method for dye production; strength and homogenous heat protective dye layer of improved adhesiveness.

2 cl, 3 tbl

FIELD: polymer materials and corrosion protection.

SUBSTANCE: invention relates to cold-drying anticorrosive coating compositions, which can be used in petroleum, gas, power, chemical, and other industries for protection surfaces of iron articles and structures. Composition of invention is based on binder, namely alkyd-styrene resin or poor alkyd resin in amount 11.0-44.0%. Composition further comprises 0.3-5.0% tannin or tannin derivatives as anticorrosive additive, 3.0-24.0% pigments, 5.0-22.-% fillers, and balancing amount of organic solvent.

EFFECT: enhanced protective properties.

4 cl, 2 tbl, 5 ex

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EFFECT: enhanced protective properties.

2 tbl, 4 ex

FIELD: pipeline heat insulation in civil and industrial building.

SUBSTANCE: coating composition includes 5-95 vol.% of polymeric binder and 5-95 vol.% of hollow microspheres. At least one composition layer is coated onto substrate and dried. Said polymeric binder contains 10-90 % of (co)polymer selected from acrylate homopolymer, styrene-acrylate copolymer, butadiene-styrene copolymer, polyvinylchloride, polyurethane, vinylacetate polymer or copolymer or mixture thereof. Binder also contains 10-90 vol.% of water and surfactant mixture. hollow microspheres have particle size of 10-500 mum and bulk density of 50-650 kg/m3, and made from glass, ceramic, polymers, sol or mixture thereof.

EFFECT: improved corrosion resistance and heat insulation of coated substrate; increased adhesion properties.

5 cl, 1 tbl, 1 ex, 3 dwg

FIELD: organic chemistry, in particular composition for corrosive and chemically stable coats.

SUBSTANCE: invention relates to alkyd-epoxy undercoat compositions based on debris from phthalic anhydride and epoxy resin distillation. Claimed composition contains (mass %) epoxydianic resin 45.0-45.4; modified alkyd resin obtained by stepwise esterification of sun flower oil, polyhydric alcohol and slop from phthalic anhydride distillation with grain-size classification of 0.05-1.1 mm and phthalic anhydride content of 37-80 % - 36.0-36.3; filler 4.9-5.5; pigment 3.5-3.8; balance: solvent; and over 100 mass % of composition it contains polyethylene polyamine as curing agent 15, and cobalt naphthenate as curing catalyst 1.8. Composition of present invention is useful in coating of metal parts and various constructions.

EFFECT: undercoat composition of high corrosion resistance, strength and lower cost.

2 tbl, 1 ex

FIELD: building materials.

SUBSTANCE: invention relates to a method for preparing compositions used for covers, among them to corrosion-water-fuel-resistant covers by nonferrous metals, concrete and ceramics in moisture and aggressive media. The composition comprises the following mass ratio of the parent components, %: film-forming mixture comprising oligomeric carboxyl-containing butadiene-nitrile rubber, 10.9-28.1 and epoxy-diane oligomer, 7.0-10.9 in the mass ratio of epoxy-diane oligomer and rubber from 19.9:80.1 to 50.0:50.0; hardening agent, 5.9-18.1; solvent, 41.0-51.1; filling agent, 1.4-1.6, and pigment, 13.6-16.4. Film-forming agent is heated preliminary at temperature 90-120°C to the conversion degree of carboxyl groups 8.8-25.2%. Mixture of γ- and β-aminopropyltriethoxysilanes is used as a hardening agent in the mass ratio = (67-75):(25-33), or 45-55% solutions of products of hydrolytic condensation of mixture of γ- and β-aminopropyltriethoxysilanes in cyclohexanone or toluene. Invention provides enhancing the strength of cover in direct/reverse impact, adhesion in moisture media, resistance to defoliation in storage and bending, to reduce swelling capacity in water.

EFFECT: improved, enhanced and valuable properties of composition.

2 tbl, 4 ex

FIELD: composition materials.

SUBSTANCE: invention relates to a method for preparing the composition cover that can be used for recovery worn out article surfaces working under conditions of high compression loadings, bearing surface of lateral framework in loading truck car in zone of slipping aperture. Method involves mixing the polymerizing epoxy composition and metallic dispersed filling agent in the ratio = (1:6)-(1:9) mas. p. p. Mixing is carried out at effect in increasing pressure in auger mixer with alternate step being each the following auger step differs from previous step by the constant value. Then the prepared composition is applied on metallic surface and kept its at the polymerization temperature up to finishing the solidification process. Composition based on epoxy resin ED-16, ED-20 with latent hardening agent dicyandiamide is used as epoxy composition. Iron powder PZH-4, iron-base powder PS 27-M, iron-base PG-USCH-35, nickel-base powder PG-SP2-M are used as a metallic dispersed filling agent. Invention provides enhancing the specific compression loading value.

EFFECT: improved method for preparing, valuable properties of cover.

5 cl, 1 tbl, 1 dwg, 6 ex

FIELD: metal-protecting materials.

SUBSTANCE: invention relates to protection of metals against corrosion using paint and varnish coatings. Invention proposes using as anticorrosive pigments co-precipitated manganite-phosphates, manganite-silicates, manganite-sulfates of metals of the general formula: MMnOxnMZ wherein M means Ca2+, Zn2+, Fe2+, Sr2+ at Z - PO43-, SiO32-, and M means Ba2+ at Z - SO42-, PO43-, SiO32-; x = 2.5-3; n = 0.5-10 with the content of co-precipitated manganite of corresponding metal from 5 to 70 wt.-% as anticorrosive pigments. Proposed pigments by their anticorrosive properties exceed that of zinc tetraoxychromate. Invention provides applying low toxic anticorrosive pigment-inhibitors with protective properties comparable with that of chromate pigments.

EFFECT: expanded assortment of anticorrosive pigments.

1 tbl