95results about How to "Solve thermal expansion and contraction" patented technology

The present invention relates to the field of gas explosion-proof, dry dedusting, and remained energy recovering in a steel-making convertor, and consists of a steel-making convertor boiloff cooling flue, a high temperature rapid valve with a water cooling system, and a coal gas inflamer. The present invention is characterized in that the flue section I behind a movable smoke cover of the steel-making converter is arranged with a high temperature rapid valve with a water cooling system, and a coal gas inflamer is arranged behind the high temperature rapid valve. The high temperature rapid valve opens when oxygen is blown in the steel-making process, the high temperature smoke gas passes through successfully; the high temperature rapid valve closes when oxygen is not blown to prevent the outside air from entering into the boiloff cooling flue. The coal gas inflamer and the high temperature rapid valve cooperate to do quality adjusting on the smoke gas in the boiloff cooling flue, to ensure the high smoke gas continuous production in the boiloff cooling flue, and the heat expansion and cold shrinkage problem caused by the rapid cooling and rapid heating of the boiloff cooling flue caused by the intermitting production of the steel-making convertor can be solved, the service life of the flue can be prolonged, the recovery quantity of the vapor can be increased, the recovery quantity of the coal gas can be increased, and the gas explosion condition can be eliminated.

The invention discloses an expansion joint used for a high temperature and high pressure pipeline. The expansion joint comprises an inner casing pipe and an outer casing pipe which can axially move relative to each other. The outer wall of the inner casing pipe is limited by a sliding ring arranged on the inner wall of the outer casing pipe. A gap among the inner casing pipe, the outer casing pipe and the sliding ring forms a sealed area, and the sealed area is sealed by filler. An opening in the side, opposite to the sliding ring, of the sealed area is a filler port. A circle of compression boss matched with the filler port in shape and size is arranged on the outer side of the inner casing pipe. The compression boss and the filler port are each provided with a flange perpendicular to the axial direction. The two flanges are connected through a plurality of sliding rods. The sliding rods and the sliding ring limit the relative movement of the inner casing pipe and the outer casing pipe in the axial direction together. The expansion joint has the beneficial effects that 1, the expansion joint is resistant to corrosion, high temperature and low temperature; 2, through the casing pipe type structural design, the expansion joint is light, small in size and convenient to install; 3, the problem that during long-distance pipeline installation, pipelines expand by heat and contract by cold when temperature changes is solved.

The invention discloses a heat collection pipe adjustable supporting device of a solar trough type heat collector. A main support of the trough type heat collector is connected with a supporting fork; a heat collection pipe bracket cross beam is connected with the supporting fork through a bolt pin in the supporting fork and can rotate around the bolt pin to form a first rotational joint; a heat collection pipe bracket upright post is connected with the heat collection pipe bracket cross beam and a U-shaped bracket; a heat collection pipe supporting seat is connected with the U-shaped bracket and can rotate around a transverse adjusting screw to form a second rotational joint; an up-down slide block is arranged in the heat collection pipe supporting seat; the up-down position of the up-down slide block can be adjusted by adjusting a height adjusting bolt; and a heat collection pipe is positioned on the up-down slide block, and can move up and down along with the up-down slide block and move left and right along with the heat collection pipe supporting seat. The device is provided with two rotational joints which can rotate along with the expansion and extraction of the heat collection pipe and realize the accurate positioning of the heat collection pipe, so that the heat collection pipe is positioned on a trough type heat collector focal line all the time when working stably at a high temperature, and a good focusing effect is achieved.

The invention discloses a power generation, energy saving and dedusting method by utilizing heat waste of exhaust gas in an electric furnace through organic rankine cycle, which is characterized in that the exhaust gas in the electric furnace is discharged from a fourth hole, and enters a combustion settling chamber after cold air interfuses the exhaust gas through a water-cooling sliding sleeve; the exhaust gas passing through the combustion settling chamber enters a uniform velocity waste heat exchanger; the exhaust gas discharges heat, enters a bag-type dust collector, and is pressed into an exhaust funnel to be discharged into atmosphere by a main fan after being dedusted; meanwhile, an organic working medium is driven by a working medium pump to absorb the heat in a straight pipe plate heat pipe exchanger to be changed into vapor; and the working medium vapor swells to do work in a steam turbine to drive a generator to generate electricity. The working medium vapor discharged from a low-boiling-point working medium steam turbine is condensed into saturation liquid by a condenser; and the working medium liquid is pressurized by the working medium pump, and is then fed into the straight pipe plate heat pipe exchanger, so as to start a new round of circulation. The power generation, energy saving and dedusting method by utilizing the heat waste of the exhaust gas in the electric furnace through the organic rankine cycle is characterized in that R600 is adopted as a circulating organic working medium. With the adoption of the power generation, energy saving and dedusting method by utilizing the heat waste of the exhaust gas in the electric furnace through the organic rankine cycle, the heat energy in the exhaust gas is recovered to a maximum limit to be transformed into high-grade electric energy. The device is low in investment, low in operation energy consumption and good in environment-protection effect.

The invention discloses a regenerative submerged arc furnace flue gas waste heat power generation method. The method is characterized by comprising the following steps that flue gases of a submerged arc furnace are exhausted from the furnace, sequentially enter a combustion sedimentation chamber, a heat accumulation temperature equalizing device and a waste heat collection chamber after being mixed with cold air through a water-cooled sliding sleeve, give off heat, enter a bag-type dust collector, and are pressed into an exhaust funnel and exhausted into the atmosphere after being subjected to bag removal; meanwhile, circulating water enters a heat exchanger to absorb the heat of the flue gases to form a steam-water mixture, and the steam-water mixture enters an evaporator, and gives off heat; and an organic working medium absorbs the heat in the evaporator through a working medium pump to form steam, and the working medium steam is expanded to apply work in a steam turbine to drive a generator to generate power. The method is characterized in that R236ea is adopted as the circulating organic working medium. Due to the adoption of the heat accumulation temperature equalizing device, the fluctuation amplitude and a peak value of the flue gases are reduced; and heat energy is converted into high-quality electrical energy, so that a device is low in investment and low in running energy consumption, and has a good environmental protection effect, and influence on the production stability and continuity of the submerged arc furnace is avoided.

The invention relates to a sleeper for a track skeleton and a method for manufacturing the sleeper, in particular to a sleeper for medium-low speed magnetic-levitation train rails, and in particular to a sleeper for supporting a track skeleton joint on a magnetic-levitation rail, wherein the track skeleton joint has large heat-expansion and cold-contraction quantity. The sleeper comprises a front H-shaped steel sleeper, a rear H-shaped steel sleeper or a square steel tube sleeper and 1-4 middle H-shaped or square steel tubes by means of welding. The sleeper has the advantages of simple structure, simple manufacturing process, convenience in installation and low manufacturing cost, and effectively solves the problem that connection between track skeletons in a special section or an arc section needs the track skeleton joint with the larger heat-expansion and cold-contraction quantity.

An integrated waste heat generating and dust removing method utilizing flue gas from the interior and the exterior of an electric furnace is characterized in that flue gas from the interior of the electric furnace is discharged through a fourth hole, is mixed with cold draft through a water-cooling sliding sleeve to burn carbon monoxide and then enters a settling chamber; flue gas getting out of the settling chamber enters a thermal storage uniform-temperature chamber and is cooled to about 100 DEG C, the cooled flue gas comes out of a booster to be mixed with flue gas getting out of an external discharge pipeline connected above a metallurgical furnace and enters a dust remover together, and the flue gas is pressed into an exhaust pipe to be discharged into the atmosphere; a low-boiling-point working medium absorbs heat of a flue gas waste heat carrier in an evaporator to become saturated steam, the saturated steam enters a steam pocket, and expands and acts in a steam turbine to drive a three-phase generator to generate power; R290 is a circulatory organic working medium. The steam pocket can be adopted to filter supersaturated moisture and impurities in a gas source to ensure stable running of the steam turbine, and the integrated organic Rankine waste heat generating and dust removing method can be adopted to reclaim heat energy in flue gas to the utmost extent and converts the heat energy into high-grade electric energy to achieve the purposes of energy saving and environmental protection.

A waste heat power generation and dust removal integrated method for flue gas exhausted from a metallurgical furnace is characterized in that flue gas in the metallurgical furnace is exhausted through a fourth hole and mixed with cold air through a water-cooling sliding sleeve; after carbon monoxide gas is burnt out, the flue gas enters a settling chamber; the high-temperature flue gas from the settling chamber enters a heat exchange chamber and gives off heat; the cooled flue gas from a booster fan is mixed with flue gas from an external exhaust pipe connected with the upper part of the metallurgical furnace, and then the mixed flue gas enters a dust remover; after dust removal, the mixed flue gas is pressed into an exhaust funnel by a main air blower to be exhausted to the atmosphere. Circulating water is used for absorbing the heat of flue gas through a heat exchanger to form gas-water mixture; the gas-water mixture enters an evaporator and gives off heat. A low-boiling point organic working medium is used for absorbing the heat of the gas-water mixture to become saturated vapor; the saturated vapor enters a vapor pocket and does work in a steam turbine so as to drive a three-phase generator to generate electricity. R123 is adopted as the cycle organic working medium. According to the waste heat power generation and dust removal integrated method, the adopted steam pocket can remove supersaturated moisture and impurities in the flue gas by filtration; heat energy in the flue gas can be converted into high-grade electric energy to the utmost extent.

A convection-bank heat exchange set for flue gas waste heat recovery comprises a flue gas inlet, a heat-accumulating temperature homogenizer, a flue gas passage, a convection pipe bank, a flue gas outlet, an ash hopper, a circulation pipe, a steam drum and a steam accumulator. The convection-bank heat exchange set is characterized in that the top of the flue gas passage is provided with the flue gas inlet, the outside of the bottom of the flue gas passage is provided with the flue gas outlet, the bottom of the flue gas passage is provided with the ash hopper, the convection pipe bank is disposed in the flue gas passage and is connected with the steam drum through the circulation pipe, the steam drum is connected with the steam accumulator through a pipe, the steam drum is disposed on the top of the outside of the flue gas passage, the heat-accumulating temperature homogenizer is disposed at the upper end of the convection pipe bank within the flue gas passage and comprises carbon-carbon composite accumulating members and a shock wave ash-remover, and the shock wave ash-remover is disposed among the carbon-carbon composite accumulating members segment by segment. The convection-bank heat exchange set has the advantages that heat in the flue gas can be recovered to the maximum extent, investment on waste heat utilization equipment is lower and the waste heat utilization equipment is more stable.

The invention discloses a passive house wall bushing waterproof air tightness structure construction method, which comprises steps of: preservation of a wall bushing opening, mounting of a large bushing with an annular water stop ring, treatment of an interface of the preserved opening, mounting of a small bushing, foaming sealing filling of an annular region, mounting of the wall bushing, foaming sealing filling of a small annular region, waterproof and crack-proof treatment at the end part of the large bushing, water resistance of a first-layer insulation board and a structure wall body interface, mounting of the first-layer insulation board, staggered mounting of a second-layer insulation board, water resistance (horizontal) at the end part of the small bushing, water resistance (vertical) at the end part of the small bushing, water resistance of the wall bushing, construction of an insulation protection layer, and detection and verification of performance of the wall bushing. Measures of double-bushing protection, double-layer annular foaming sealing filling isolation, double-layer sealing treatment, double-layer staggered insulation energy conservation, four waterproof treatment and two crack-proof treatment are adopted, and integrated function requirements of passive building wall bushing protection, insulation energy conservation, air tightness and water resistance can be realized.

The invention discloses a power generation and dedusting method by utilizing waste heat of high-temperature alternating exhaust gas in an electric furnace through organic rankine cycle, which is characterized in that the exhaust gas in the electric furnace is discharged, and enters a combustion settling chamber after cold air interfuses the exhaust gas through a water-cooling sliding sleeve; the exhaust gas passing through the combustion settling chamber enters a heat storage temperature equalizer, and then enters a waste heat exchange chamber after passing through the heat storage temperature equalizer; the exhaust gas discharges the heat, enters a bag-type dust collector, and is pressed into an exhaust funnel to be discharged into atmosphere by a main fan after being dedusted; meanwhile, an organic working medium absorbs the heat through a working medium pump in an evaporimeter to be changed into saturated vapor; and the working medium vapor swells to do work in a steam turbine to drive a generator to generate electricity. The working medium vapor discharged from a low-boiling-point working medium steam turbine is condensed into saturation liquid by a condenser; and the working medium liquid is pressurized by the working medium pump, and enters the evaporimeter to start a new round of circulation. The power generation and dedusting method by utilizing the waste heat of the high-temperature alternating exhaust gas in the electric furnace through the organic rankine cycle is characterized in that R123 is adopted as a circulating organic working medium. With the adoption of the heat storage temperature equalizer, the amplitude and a peak value of fluctuation of the exhaust gas are reduced, the heat energy is transformed into the high-grade electric energy, and the device is low in investment and low in operation energy consumption.

The invention relates to a wood-stone combined floor board combined by solid wood and stone materials and used in geothermal environment and a production process thereof. The wood-stone combined floor board comprises a solid wood floor board body, wherein the surface of the solid wood floor board body is provided with an arc-shaped groove; a stone material floor board is arranged in the arc-shaped groove. The integral cost of the floor board is greatly reduced; the product competitive power is greatly improved; the product has wide market prospects. The problem of heat expansion and cold shrinkage is solved by using the splicing gap between the solid wood and the stone material. The production process is simple; wood working machinery can be used for fast groove forming; the dug materials can be enabled to be completely remained; the finished product rate is high.