147 results about "Waste-to-energy" patented technology

Mechanically and biologically stable briquettes and pellets are obtained from either municipal solid waste (MSW), Refuse Derived Fuel (RDF) or municipal sewage sludge and their combination for purposes of disposing said briquettes and pellets as fuel in waste-to-energy processes such as the one described herein or to form geometric aggregates with such briquettes for their disposal at landfill sites. The use of binding material is not required whereas fuel additives such as crushed coal and petroleum residues may be added to enhance fuel performance but are not needed to improve waste processing or product stability and mechanical properties.

Combined microwave heating and plasma/electric arc heating is utilized in several processes and apparatus which involve co-production of pig iron and high quality syngas, biomass to liquid fuel production, coal to liquid fuel production, co-gasification of biomass and coal, municipal solid waste treatment, waste-to-energy (agriculture waste, ASR and PEF), EAF dust and BOF sludge treatment to recover zinc and iron, hazardous bottom ash vitrification, and bromine, chlorine and sulfur removal/recycling.

To mitigate the potential significant impact on our society due to the continued reliance on high-cost diesel hydrocarbon fuel and the implementation of increasingly strict emission controls, an apparatus is disclosed which provides the means for extracting additional heat from an internal combustion engine while providing the cooling needed to meet stricter emissions standards. The present disclosure describes an apparatus operating on a Rankine cycle for recovering waste heat energy from an internal combustion engine, the apparatus including a closed loop for a working fluid with a single shared low pressure condenser serving a pair of independent high pressure circuits each containing zero or more controlled or passive fluid splitters and mixers, one or more pressure pumps, one or more heat exchangers, and one or more expanders, and the means for controlling said apparatus.

The invention discloses an internal combustion engine vapor supercharging waste heat recovery system. According to the technical scheme, internal combustion engine cylinder sleeve cooling water is in tandem connection with the cold end of a thermoelectric generator, an expansion machine, a preheater and a circulating water pump sequentially through pipelines to form into a cooling water heat utilization circulating system; air performed air suction compression through a compressor is sent to an internal combustion engine; an exhaust pipe of the internal combustion engine is in tandem connection with the thermal end of the thermoelectric generator, the gas side of an evaporator sequentially to form into an exhaust thermal utilization system; a preheater is in tandem connection with the working medium side of the evaporator, a turbine expansion machine, the working medium side of the condenser and a working medium pump sequentially to form into an organic rankine cycle system; the compressor is in shaft connection with a turbo machine to form into a turbosupercharger. The internal combustion engine vapor supercharging waste heat recovery system has the advantages of breaking the temperature limit of the recycle source of the organic rankine cycle, recycling the waste heat energy of the exhaust and the cooling water, achieving efficient utilization of the waste heat, avoiding the condition that the exhaust energy is not enough to drive a supercharging system when the load is low, increasing the effective working range of the supercharging system and achieving the purpose of efficiently recycling the waste heat energy.

The present invention provides a pyrolysis system and method thereof which are capable of converting an entire rubber tire into several energy resources in an environmentally-friendly manner. The system includes a tire transporting unit, a waste to energy conversion unit, and a energy collection unit. The waste to energy conversion unit includes a conversion housing having a reaction chamber for receiving the rubber tire for pyrolysis processing to decompose the rubber tire into fuel oil, methane gas and carbon black, while metal wire from the rubber tire are resided for recycling use.

An oil cooler for cooling hydraulic oil that has increased in temperature due to energy loss in a hydraulic circuit a radiator for cooling engine cooling water that has increased in temperature as a result of cooling an engine and an ATAAC for cooling engine intake air that has increased in temperature as a result of being compressed by a turbocharger, are provided with heat pipes for vaporizing low-boiling medium by absorbing heat from the oil cooler the radiator and the ATAAC. A power recovery turbine is rotated by energy provided by vaporized low-boiling medium is provided for the engine. A low-boiling medium circuit is provided so as to drive the turbine by feeding the low-boiling medium that has been vaporized by waste heat energy. The low-boiling medium circuit includes the heat pipes of the oil cooler the radiator, and the ATAAC, as well as the turbine.

A waste-to-energy cogeneration system is described in various embodiments. The system can convert certain fuel-laden waste to thermal energy and electrical power. In certain embodiments, fuel-laden waste which has not been pre-filtered or pre-treated to remove particulates and water is deposited in the cogeneration system and prepared by the system for combustion in an unmodified diesel engine. The fuel-laden waste can comprise oils, greases and fats from food preparation which are contaminated with water and particulates. Thermal and mechanical energy produced by the engine are utilized to provide thermal energy and electrical power external to the cogeneration system.

The invention discloses a system for recycling waste heat energy of exhaust gas of an internal combustion engine by using air circulation. One set of air circulation (Brayton Air Cycle) system is additionally arranged on an internal combustion engine exhaust pipe to recycle the waste heat energy of the exhaust gas and convert the waste heat energy into effective work. A technical scheme is as follows: after being pressurized to a certain pressure by a compressor, the air is heated in a heat exchanger to form a high temperature and high pressure gas, and then the high temperature and high pressure gas is expanded in a turbine to do work. Turbine output work is used for driving an air compressor of an internal combustion engine air intake system to supercharge inlet air and can be also used for driving a high speed motor to generate power. In addition, the system disclosed by the invention can be also designed in a heat return circulation mode, so that energy recycling efficiency is further increased through two-stage heating. An internal combustion engine electronic control system is used for adjusting working pressure and flow of air circulation in real time according to an exhaust state, so as to optimize circulating efficiency. The system for recycling the waste heat energy of the exhaust gas of the internal combustion engine by using the air circulation, disclosed by the invention, can obtain an energy saving and environment friendly effect by using air as a working medium and has the advantages of comparatively simple structure and better application value.

A plant produces electrical energy from municipal solid waste without exhausting a carbon dioxide or other carbon based gas to the atmosphere. The plant includes a source of artificial light powered by electrical energy, and a reactor into which the municipal solid waste is fed and which is operated under temperature, pressure and flow rate conditions to produced a syngas. An electrical energy generating station at which the syngas is burned produces the electrical energy and a flue gas comprising carbon dioxide and other products of combustion. At least a portion of the electrical energy is used to power the artificial light source. A carbon dioxide collector separates the carbon dioxide from the other products of combustion in the flue gas to provide a clean carbon dioxide suitable as a nutrient for microorganisms, and a farm of the microorganisms is illuminated essentially constantly, alternately with sunlight and artificial light from said source.

The invention provides a comprehensive waste heat utilization system of an internal combustion engine. The system comprises an organic working medium pump, a first heat exchanger, an expansion machine, a second heat exchanger, a generator, a water inlet pipe, a water outlet pipe, a cooling water pump, a first stop valve, a first cooling tower, a second stop valve, a first inlet pipe, an absorption type heat pump unit, a first outlet pipe, a flue gas waste-heat heat exchanger, a flue gas emission pipeline, a fluid circulation inlet pipe, a fluid circulation outlet pipe, a third stop valve, a second outlet pipe and a fluid pump. The flue gas waste-heat heat exchanger and the absorption type heat pump unit are used for recovering waste heat of flue gas emitted by the internal combustion engine and waste heat of cooling water of the internal combustion engine for heating organic working medium, and the organic working medium is enabled to evaporate to overheating gaseous organic working medium under pressure for driving the expansion machine to act. Based on Rankine cycle of the organic working medium, waste heat energy of the internal combustion engine is recovered comprehensively, and comprehensive waste heat utilization efficiency of the internal combustion engine and power generation efficiency of an organic working medium Rankine cycle system can be improved.

The co-combustion process may comprise the following unit operations: routing of hot gas (10) generated in the clinker cooling process to a rotary kiln (1); use of part of the rotary kiln exhaust gas to dry solid wastes in rotary dryers; leading the gases from both the dryer and the combustion kiln to the secondary combustion chamber (2); use of additional fuel to boost up the secondary combustion chamber reaction temperature to as high as 1200° C.; primary dry gas scrubbing in a precalciner or precalciners (3, 3a); heat recovery (4) and power generation; secondary gas scrubbing (5) in a semi-dry scrubber, bag filtering after activated carbon injection and returning of all the collected ash and used carbon into the waste kiln and/or a cement kiln. Detrimental materials for cement processing generated by waste combustion can be by-passed to a scrubbing system and a cement kiln. Residue slag from waste kilns can be treated and reused.

A waste energy-based vehicle air conditioning system includes efficient compression driving means coupled to refrigeration means. In one implementation, the compression driving means includes a controller (e.g., magnetic clutch) that couples mechanical waste energy from an engine fan axle, a vehicle drive shaft, or a transmission shaft to an axle of a refrigerant compressor. Alternatively, the controller can also include a battery that is charged from the mechanical waste energy. Upon detecting certain pressure values, the controller powers the refrigerant compressor with a rotating axle (e.g., during deceleration) or with battery power, as appropriate. In one implementation, the controller is configured to engage compression immediately upon detecting that the vehicle is decelerating. One or more kits can be used to retrofit existing vehicles to operate the respective air conditioning systems principally on waste energy.

The invention provides a waste heat utilizing system of a thermal power plant and a power unit. The waste heat utilizing system of the thermal power plant comprises a boiler outlet flue gas waste heat utilizing system, an air preheater outlet flue gas waste heat utilizing system and a driving steam turbine steam exhaust waste heat utilizing system; the flue gas of the air preheater outlet is used for heating the condensed water from a low-pressure heater; the driving steam turbine steam exhaust waste heat utilizing system comprises a steam-water heat exchanger and an air-water heat exchanger which are formed into a steam-water-air heat exchange system; primary air and or secondary air of the air preheater inlet are or is heated by the steam exhaust of a driving steam turbine through the steam-water-air heat exchange system; the feed water and the condensed water are heated by part of high temperature flue gas of the boiler outlet. According to the waste heat utilizing system of the thermal power plant and the thermal power unit, the waste heat energy of the thermal power plant is effectively utilized and accordingly the efficiency of the thermal power plant is improved, meanwhile the coal consumption is reduced, and emissions of pollutants are reduced.

A cogeneration system is provided which includes a prime mover for obtaining power for driving a generator by combustion of a fuel, a waste heat boiler for recovering thermal energy from exhaust gas discharged from the prime mover, and a heat exchanger for heating air that is to be fed into an air conditioner by heat exchange with the exhaust gas discharged from the waste heat boiler. Drain water that is generated from the exhaust gas cooled by heat exchange in the air-heating heat exchanger (5) with the air that is to be fed into the air conditioner (30) is recovered by drain water recovery/supply means (36). The drain water recovery/supply means (36) supplies the drain water thus recovered to appliances (37, 38) that require comparatively high temperature water. Thermal energy can thus be recovered effectively from the drain water discharged from the heat exchanger on the downstream side of the waste heat boiler, thereby improving the efficiency of recovery of waste heat energy.

Through the addition of tertiary air and a reduction of secondary air, NOx emissions from a waste-to-energy (WTE) boiler may be reduced. The tertiary air is added to the WTE at a distance from the secondary air, in a boiler region of relatively lower temperatures. A secondary NOx reduction system, such as a selective non-catalytic reduction (SNCR) system using ammonia or urea, may also be added to the boiler with tertiary air to achieve desirable high levels of NOx reductions. The SNCR additives are introduced to the WTE boiler proximate to the tertiary air.

A method and an apparatus for disposing wastes comprising the steps of conducting a hydrothermal decomposition reaction of the wastes, separating the products into a solid fuel and waste water, combusting the solid fuel, scrubbing the combustion gas, generating steam using the heat generated by the combustion, and purifying the waste water, exhibit a high energy-efficiency, while exhibiting a high removal rate of the pollutants generated during the combustion.

The invention provides a hydraulic cylinder capable of being started under assistance of waste energy. The hydraulic cylinder mainly comprises a cylinder barrel, end covers, a piston, a piston rod, a guide sleeve, a butter plate and a spring; the end covers comprise the end cover A and the end cover B; and the hydraulic cylinder is characterized in that waste energy generated after the piston stops moving is stored and converted into kinetic energy for assisting starting. Through the buffer plate with the spring, buffer static motion, waste energy storage and starting assistance of the piston are achieved; through an arc-shaped groove in the buffer plate, pressure balance of the two sides of the buffer plate is achieved; through a sealing ring on the outer side of the piston and an oil storage groove in the inner side of the piston, sealing and leaked oil temporary storage of the piston can be achieved.

A waste-to-energy incineration system, in which the amount and heat value of exhaust gas largely changes in long and short periods, comprises an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, a superheater for superheating steam generated in the boiler, a steam turbine driven by steam superheated by the superheater, a generator driven by the steam turbine, a fuel reformer for reforming source fuel, and a combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas led from the incinerator which is able to stably decompose generated dioxin in waste incineration exhaust gas.

The invention belongs to the field of drying devices and provides a multifunctional subsidiary agricultural product drying chamber which is mainly characterized by utilizing a solar energy collector and an air energy hot pump to serve as primary heat supply devices, adopting separated waste heat in hot air and hot water in backflow to serve as circulation heat supply devices and separating exhausted moisture to serve as waste energy utilization devices, wherein waste energy includes regained moisture, regained fragrance, waste cold and the like. The multifunctional subsidiary agricultural product drying chamber has the advantages of being reasonable in structure, scientific in design, capable of saving energy, protecting the environment and recycling the waste energy, wide in application and multiple in functions, can achieve drying, refrigeration, moisture and fragrance regaining of various subsidiary agricultural products, and is good in effect proved by pilot run of a prototype.

The invention relates to the technical field of hot waste water recovery, in particular to a sewage heat energy recovery system. According to the system, heat energy recovery is realized by arranging a heat exchanging device which comprises a filtering device and a plurality of groups of heat exchangers, conducting filtering and recovery of the hot waste water, and arranging a corrugated heat exchanging tube to realize heat exchange of the hot waste water and normal temperature clean water. Compared with a traditional heat exchanging device, tubes communicating with the starting end heat exchanger and ending end heat exchanger are additionally arranged, so as to realize gradual temperature rising and heat exchanging of the normal temperature clean water and the hot waste water and improve heat exchanging efficiency, and in order to clean waste in the heat exchanger more efficiently, the heat exchanger is filled with filtering board with alumina balls which are driven by back washing water, so as to conduct filtering to the hot waste water, enable the waste not to enter in the heat exchanger, and improve the exchanging efficiency of the heat exchanger. The system can recover waste heat energy and save a large amount of water resource.