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

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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.

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2 tbl, 6 ex

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2 cl, 2 tbl

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2 tbl, 6 ex

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2 tbl, 6 ex

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2 cl, 4 tbl, 12 ex

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22 cl, 2 dwg, 6 tbl, 3 ex

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74 cl, 1 tbl

Polymer composition // 2277561

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2 tbl, 9 ex

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2 ex

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7 cl, 2 tbl

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2 cl, 3 tbl

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4 cl, 2 tbl, 5 ex

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2 tbl, 4 ex

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5 cl, 1 tbl, 1 ex, 3 dwg

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

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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.

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EFFECT: expanded assortment of anticorrosive pigments.

1 tbl

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