214results about How to "Improve waste heat utilization efficiency" patented technology

The invention discloses a system for regulating and optimizing smoke by power generation and recycle of residual heat of a sintering ring cold machine, which mainly comprises a ring cooling machine, a ring cooling machine wind box, a ring cooling machine wind chamber, a switching baffle door, a dual-pressure boiler without resisual heat and a steam filling and condensing type dual-pressure steam turbine, wherein the ring cooling machine wind chamber is divided into a high-temperature wind chamber and a low-temperature wind chamber which are respectively connected with the dual-pressure boilerwithout resisual heat through inlet flues, the steam outlet of the dual-pressure boiler without resisual heat is connected with the steam filling and condensing type dual-pressure steam turbine, and the outlet of a sediment chamber of the dual-pressure boiler without resisual heat is connected with a circulation fan through the flues and a wind complementing door. The invention has the highest efficiency in recovering residual heat, can use the resisual heat of sintering mineral materials at most, keeps stability, high efficiency and contineous operation for power generation by using the residual heat, and has important meaning for steal and iron plants.

The invention relates to an energy-saving environment-friendly sintering waste gas waste-heat utilization and pollutant purification process and system. The energy-saving environment-friendly waste gas waste-heat utilization and pollutant purification process includes that sintering waste gas is divided into a low-temperature low-sulfur sintering waste gas, a middle-temperature high-sulfur sintering waste gas and a high-temperature middle-sulfur sintering waste gas according to waste gas temperature and pollutant discharge characteristics; content of sintering waste gas SO2 of the low-temperature low-sulfur is below the national discharge standard, and the SO2 can be directly discharged after dust removal; after the sintering waste gas in a middle-temperature high-sulfur section is subjected to dust removal and desulfurization processing, the SO2 meets the national discharge standard and can be discharged; the sintering waste gas in a high-temperature middle-sulfur section mixed with ring-cold waste gas is led into a sintering machine, and hot-wind igniting and hot-wind sintering are performed. The invention further provides a system for implementing the energy-saving environment-friendly sintering waste gas waste-heat utilization and pollutant purification process. Waste heat of the sintering waste gas can be recycled in classification and gradiently utilized, so that energy can be saved; the low-sulfur waste gas can be discharged directly, so that desulfurization cost of the waste gas is lowered; part of the high-sulfur waste gas participate in circulation, so that total discharge amount of pollutants is decreased, splitting decomposition of dioxin happens due to high temperature, and the purification function of the sintering waste gas is achieved.

A system used for sinter ore cooling and sensible heat efficient recycling comprises a stepping sintering machine used for sintering mixed iron ore materials, a vertical cooling kiln used for cooling sinter ore which is sintered and crushed, a feeding mechanism arranged between a discharging opening of the stepping sintering machine and a feed inlet of a material receiving funnel of the vertical cooling kiln, a gravity dust remover, a high-temperature smoke unit, a discharging machine, a belt conveyer and a vertical double-pressure waste heat boiler used for heat exchange, wherein the gravity dust remover and the high-temperature smoke unit are connected with a gas outlet in the upper portion of the vertical cooling kiln, and the discharging machine and the belt conveyer are arranged on a discharging opening of the vertical cooling kiln. A gas outlet of the vertical double-pressure waste heat boiler is connected with a gas inlet of a low-temperature gas unit, a gas outlet of the low-temperature gas unit is connected with a gas inlet in the lower portion of the vertical cooling kiln, and a heat exchange pipe of the vertical double-pressure waste heat boiler is connected with a power generation system. By means of the system, the sinter ore and cooling air can flow reversely in a closed space, cooling time of the sinter ore is prolonged, heat exchange is sufficient, heat efficiency of the system is greatly improved, and efficient recycling of sensible heat of the sinter ore is achieved.

The invention relates to a process for dually continuously producing molten steel by using an iron-containing material rotary hearth furnace, which comprises the following steps: forming a molten pool in a smelting furnace in advance, and blowing a carbon-containing material and oxygen to form foam slag; reducing the iron-containing material to form an iron-containing material of which metallization rate is 90 to 97 percent and temperature is between 900 and 1,200 DEG C through the rotary hearth furnace, and feeding the iron-containing material into the smelting furnace through a high-temperature feeding system to be smelted and reduced; blowing high-temperature oxygen or oxygen-enriched air to combust with CO produced by the smelting furnace; continuously pouring the molten steel into an oxygen blowing furnace through a siphon port, adding a little amount of fusing agent into the oxygen blowing furnace to perform slagging, desulfuration and dephosphorization, and blowing oxygen by using a plug-in oxygen gun to further adjust the content of C in the molten steel and the temperature so as to obtain the molten steel directly supplied to an LF or RH refining furnace. The process has the advantages of high production rate, high thermal efficiency and long furnace service life, implements direct production of the molten steel from ores or iron-containing materials by using continuous steel making equipment consisting of the rotary hearth furnace, the smelting furnace and the oxygen blowing furnace, saves equipment and capital construction investment, saves the land, simplifies material flow, and is easy for serialization and automatic control of the production.

The invention provides a metallurgic electric furnace flue gas waste heat recovery system for realizing high-efficiency recovery of waste heat of a metallurgic electric furnace. The system comprises a waste heat boiler (4). The waste heat boiler is arranged outside an electric furnace (1). The flue gas exhaust from the electric furnace is guided into the waste heat boiler. The waste heat boiler comprises an evaporation heating surface (5), a coal economizer (6) and a steam tank (3). The coal economizer supplies water to the waste heat boiler. The hot water flowing out of the exit of the coal economizer is supplied to the steam tank. The bottom of the steam tank is connected with the entrance of the evaporation heating surface. The steam tank supplies saturated water to the evaporation heating surface. The middle part of the steam tank is connected with the exit of the evaporation heating surface. The steam-water mixture enters the steam tank after heat absorption and undergoes steam-water separation in the steam tank. The system further comprises a radiation heating surface which is arranged inside the electric furnace. The entrance of the radiation heating surface is connected with the steam tank. The saturated steam inside the steam tank flows to the radiation heating surface, the radiation heating surface absorbs the high-temperature radiation heat inside the electric furnace and heats the saturated steam to form superheated steam, and the superheated steam is guided out of the exit of the radiation heating surface.

The invention discloses a solar energy combined cycle power generation system for variable irradiation regulation. The solar energy combined cycle power generation system comprises a tower-type solar heating air heat collecting system, a gas turbine power generation system, a Rankine cycle power generation system, and a Kalina cycle power generation system. According to the solar energy combined cycle power generation system for variable irradiation regulation, a fossil fuel is not required for afterburning during low irradiation, a solar energy storage device is not required, and when the intensity of solar irradiation is relatively low, by means of change of an operation mode, the system bypasses gas turbine cycle and directly supplies heat for Rankine cycle and Kalina cycle, or bypasses gas turbine cycle and Rankine cycle and directly supplies heat for Kalina cycle, so that afterburning of a number of fossil fuel during low irradiation is avoided, and low-irradiation solar energy can fully utilized for solar power generation.

A device with a griddle and a process for generating power by efficiently recycling sinter waste heat relate to the technical field of waste heat power generation. The device comprises a sinter cooling system, a waste heat power generation system and a smoke system. The sinter cooling system and the waste heat circulation power generation system are connected through the smoke system to form a loop. The process includes 1) sinter cooling, 2) the smoke system and 3) waste heat power generation. The device and the technological process for waste heat power generation have the advantages of completely utilizing waste heat discharged in the sinter cooling process, obviously increasing power generation quantity, obviously reducing system self power utilization rate and being remarkable in energy-saving effect.

The invention discloses a triangular flash circulating system, wherein, an evaporator, a decompression mechanism, a first screw expansion power machine and a condenser are sequentially connected together through a pipeline to form a working medium circulating passage; the evaporator is equipped with a heating passage for heating the working medium in the working medium circulating passage; and the condenser is equipped with a cooling passage for cooling the working medium in the working medium circulating passage. In addition, the invention further provides a triangular flash circulating method, comprising the following steps: A. heating the working medium in the working medium circulating passage through the heating passage; B. decompressing the heated working medium so that the working medium reaches a flash critical state; C. allowing the working medium in the flash critical state to enter the screw expansion power machine for flash work; and D. cooling the working medium flowing out of the screw expansion power machine through the cooling passage, and then repeatedly operating the above steps. The triangular flash circulating system and the method thereof provided by the invention can fully utilize residual heat resources and improve residual heat utilization ratio.

The invention discloses an air-conditioning device capable of realizing gradient utilization for waste heat of a ship. The air-conditioning device comprises a heat pump system, an organic Rankine cycle (ORC) system, a seawater cycle system, an air-conditioning terminal system, a smoke pipeline system, a motor, a power generator and a rotary shaft switcher. According to the air-conditioning device disclosed by the invention, a previous utilization manner for waste heat of a diesel engine of a ship is changed, and ORC and a heat pump technology are coupled to realize the gradient utilization for the waste heat, that is, high-temperature smoke drives the ORC system at first, then enters a single-stage waste heat boiler, and finally carries out heat exchange and heating; and a turbine of the ORC system drives a compressor and the power generator, and an effect of 'cold, heat and electricity' cogeneration is achieved. The ORC system, the heat pump system and the seawater cycle system are cooperated, and in a high-temperature environment, a condensation temperature of a refrigerant is lowered by deep low-temperature seawater, so that the problem of poor refrigeration performance of an air conditioner of the ship is solved; and in a low-temperature environment, an evaporation temperature of the refrigerant is raised through condensation heat of an organic working medium, so that the problem of poor heating performance of the air conditioner of the ship is solved. Utilization efficiency for the waste heat of the diesel engine is increased through the gradient utilization for the waste heat of the smoke, so that economical efficiency and energy conservation are achieved.

The invention discloses a CO2 Rankine cycle system for heavy-duty diesel engine waste heat gradient utilization. The CO2 Rankine cycle system is a special CO2 Rankine cycle system with CO2 serving as a working medium, waste heat of diesel engine high-temperature flue gas serving as a heat source, and a waste heat driving absorption refrigeration product of diesel engine cooling system hot water serving as a cold source. The CO2 Rankine cycle system is mainly composed of a flue gas waste heat exchanger, CO2 turbines, power equipment, a regenerator, a condenser, a high-pressure pump, a flue gas water heater and an absorption refrigerator. The characteristic that the condensation enthalpy of the CO2 working medium near the critical point is reduced is skillfully utilized; and the efficiency of conversion of heat into power is higher than that of an ORC cycle or other cycles and is obtained through a special cascade stage combined cycle formed by high and low grade waste heat, so that the fuel oil use ratio of a diesel engine is increased by 18%-25% or above. The CO2 Rankine cycle system for heavy-duty diesel engine waste heat gradient utilization is capable of achieving waste heat power generation/driving, heat supply and refrigeration poly-generation and has remarkable economic benefits, social benefits and application prospects.

The invention discloses a method for preparing a microfine mineral admixture by using the waste heat of a kiln. The method comprises the following steps that: waste heat of waste gas generated by thekiln is used for preparing low-grade superheated vapor in a waste heat boiler; by taking the superheated vapor as power, a vapor stream grinding-grading machine is used for grinding the mineral admixture; and the slag is preheated by fume and delivered into the grinding-grading machine to realize the microfine processing of solid wastes such as the mineral admixture and the like. Compared with theprior technical scheme, the process can perform scale processing of the mineral admixture with low cost, can improve the utilization rate and the added value of the mineral admixture, realizes the resource recycling of wastes and improves environment.

The invention discloses a recovery device for waste heat of waste water. The recovery device is innovative in that the recovery device comprises a high-temperature wastewater pool, a sewage pump, a sewage pre-processor, a filter tank, a first-stage heat exchanger, a second-stage heat exchanger, a heat pump, a cold water tank A, a cold water tank B, a hot water tank and a low-temperature wastewater pool; the high-temperature wastewater pool is connected with the filter tank by means of the sewage pre-processor; the filter tank is connected with the first-stage heat exchanger by means of a pipeline; the first-stage heat exchanger is connected with the cold water tank A, the hot water tank and the second-stage heat exchanger; the second-stage heat exchanger is connected with the low-temperature wastewater pool and the heat pump; an evaporator and a condenser are arranged in the heat pump; a compressor and a throttle valve are arranged between the evaporator and the condenser; and one end of the condenser is connected with the cold tank B and the other end of the condenser is connected with the hot water tank. The recovery device for waste heat of waste water has following advantages: by means of two stages of heat exchangers, heat exchange of waste water is performed so that higher utilization efficiency of waste heat is obtained; and waste water is pre-processed before flowing into heat exchangers in order to reduce water dirt staying in the heat exchangers and therefore working efficiency of the heat exchangers is not reduced.

The invention relates to a boiler flue gas purifying and heat exchanging device. The boiler flue gas purifying and heat exchanging device comprises a boiler, a flue gas purifying chamber, a first heat exchanger, a second heat exchanger and a reverse osmosis membrane set, wherein the boiler is communicated with a flue inlet in the flue gas purifying chamber through a flue gas pipeline, a flue gas outlet in the flue gas purifying chamber is communicated with the second heat exchanger, a liquid outlet in the flue gas purifying chamber is communicated with the first heat exchanger, the first heat exchanger is communicated with the reverse osmosis membrane set, and the reverse osmosis membrane set is communicated with a liquid inlet in the flue gas purifying chamber; the flue gas purifying chamber comprises a casing, a flue inlet pipe, a DC power supply, a negative electrode, a positive electrode, an activated carbon layer and a flue exhausting pipe; circulation liquid is stored in the casing; a coil pipe is arranged on the first heat exchanger, a heat exchanging flue pipe is arranged on the second heat exchanger, and an outlet in the heat exchanging flue pipe is communicated with a chimney. According to the boiler flue gas purifying and heat exchanging device disclosed by the invention, when flue gas is purified through the flue gas purifying chamber, the circulation liquid in the flue gas purifying chamber directly performs heat exchange with the flue gas; the circulation liquid is in direct contact with the flue gas, so that the heat exchanging efficiency is high, and the heat loss is low.

Equipment for steel slag air quenching and waste heat recycling belongs to the technical field of the steel slag processing equipment and method. Steel slag air quenching and waste heat recycling processes are utilized to treat high-temperature steel slags and recovering heat; and the technical scheme is as follows: in the equipment, an air quenching slag pot is connected with a pelletization air tunnel which is connected with a grate cooling conveyor; the grate cooling conveyor is connected with a high-temperature-resistant bucket elevator; the high-temperature-resistant bucket elevator is connected with a circulating fluidized bed heat recovery boiler; an external nitrogen pipeline is connected with the pelletization air tunnel and the grate cooling conveyor, respectively; and a nitrogen circulating pipeline is connected with the high-temperature-resistant bucket elevator and the circulating fluidized bed heat recovery boiler, respectively. The process flow comprises hardening and cracking liquid-state steel slags into even particles by using low-temperature nitrogen, and then feeding the steel slag particles to the circulating fluidized bed heat recovery boiler through pneumatic transmission so as to collect waste heat and zero-valent iron. The integrated steel slag air quenching process provided by the invention is in a world leading level and is innovation of liquid-state steel slag treatment and heat recovery, thereby having wide prospect.

The invention belongs to the field of production of vanadium pentoxide, and particularly relates to a treating method for tail gas produced after vanadium slat is roasted through a rotary kiln. The method comprises the following steps that a, vanadium slag roasting tail gas enters a dust removal system and is separated to obtain vanadate and tail gas I, wherein the vanadate is transferred into a pulping groove; b, the tail gas I enters a waste heat boiler system and exchanges heat with process water supplied externally to be cooled, tail gas II is obtained, and the process water is changed into saturated vapor to be supplied externally; c, the tail gas II enters a Venturi system to be cooled further, and tail gas III is obtained; d, the tail gas III enters a desulfurizing tower from the bottom and makes countercurrent contact with alkali liquor sprayed on the top, defogging is carried out, up-to-standard emission is carried out, and the alkali liquor enters a sewage treating system. By means of the method, the vanadium pentoxide rotary kiln roasting tail gas waste heat utilization rate can be improved, sulfide in the roasting gas can be discharged on standard completely, and therefore a new technological process of clean production of a vanadium pentoxide roasting tail gas system is achieved.

The invention relates to a waste-heat utilization triple generation system for blast furnace slag water employing a minter process. The waste-heat utilization triple generation system comprises a granulating device, wherein the granulating device is orderly communicated with a slag-water separating device, a settling pond and a sediment heat storage pool, wherein the sediment heat storage pool is connected with a first inlet of a heat exchange device by virtue of a waste heat water supply pump group; a first outlet of the heat exchange device is communicated with a granulating reservoir; a second inlet of the heat exchange device is respectively connected with the outlet of a heating user and the first outlet of a refrigeration mechanism through heating water supply pump groups; the inlet of the heating user and the first inlet of the refrigeration mechanism are communicated with the second outlet of the heat exchange device; the second inlet of the refrigeration mechanism is communicated with the second outlet of the refrigeration mechanism by virtue of an indoor refrigeration user and a dehumidified blast user; the outlet of the granulating reservoir is communicated with the granulating device by virtue of the granulating water supply pump group. The system is applied to triple generation of heating, refrigerating or blast furnace dehumidified blasting, and is high in heat efficiency and stable in water quality.

The invention relates to a method for the in-situ production of solvent in an oil layer to exploit thickened oil. The method includes the steps that crude oil in the oil layer near a shaft is heated to a target temperature by using an electric heating device, a chemical reaction assistant is injected into a heating section to achieve the reaction condition of high-temperature hydrothermal crackingof the crude oil, light oil components and gas generated move upwards to a vapor cavity under the action of heating power and gravity, and the light oil and part of gas transferred to a vapor-liquidinterface are dissolved into the crude oil to reduce the viscosity of the crude oil and increase the yield of the crude oil; non-condensed gas left in the vapor cavity is used for expanding and supplementing energy for the vapor cavity, so that the heat loss of the vapor cavity to a top cover layer is reduced; and the crude oil discharged to a cracking reaction section is heated and then continuesto be cracked, and the crude oil discharged to a production section enters into a screen pipe and then is lifted to the ground through an underground pump. According to the method for the in-situ production of the solvent in the oil layer to exploit the thickened oil, the solvent is generated in the oil layer in situ to achieve solvent-assisted thickened oil recovery, so that the heat utilizationrate is increased, the CO2 emission is reduced, the final recovery ratio is increased, and the method has wide market application prospects.

The invention provides sludge drying equipment using waste heat of landfill gas power generation, which belongs to environmental protection equipment. The equipment employs waste heat of condensed water of a landfill gas power generator assembly, flue gas, waste water and the like to heat and dry sludge entering into the equipment with a hollow stirrer in the sludge drying equipment, and can recycle condensed water of the power generator assembly and reduce the temperature of flue gas and waste water to be discharged; the outer walls of a stirring drying cabin and a spindle are provided with vacuum heat pipes, and a conveying drying cabin is also provided with vacuum heat pipes, which enables a low grade heat source in the stirring drying cabin to be recycled again and to be used for redrying sludge in the conveying drying cabin, thereby realizing reutilization of the waste heat of landfill gas power generation. The sludge drying equipment provided in the invention has the advantages of a reasonable structure, a high waste heat utilization rate, a good sludge drying effect, strong capability of continuous working, etc.

The invention relates to a cascade utilization system for blast furnace slag waste heat. A molten blast furnace slag granulating device is connected with a separator. A slag particle discharging pipe of the separator is connected with a first gas collecting cover. An outlet of the first gas collecting cover is connected with a first inlet of a waste heat boiler. A gas discharging pipe of the separator is connected with a second inlet of the waste heat boiler. A tail gas outlet of the waste heat boiler is connected with an inlet of a dust remover. An outlet of the dust remover is connected with an inlet of a circulating fan. An outlet of the circulating fan is connected with an inlet of a first wind chamber. An outlet of an air feeder is connected with an inlet of a second wind chamber. An outlet of the first wind chamber and an outlet of the second wind chamber are connected with a gas inlet in the bottom of a cooling machine. A gas outlet in the top of the cooling machine is connected with an inlet of the first gas collecting cover and an inlet of a second gas collecting cover. The tail end of the cooling machine is connected to a slag pit. Through the cascade utilization system, the functions that molten blast furnace slag is granulated, the blast furnace slag high-grade heat is recycled to generate steam used for generating electricity through a turbo generator set, the blast furnace slag low-grade heat is recycled to preheat air fed to a hot air furnace, tail gas is purified can be achieved. The utilization efficiency of the blast furnace slag waste heat is high, and the good energy-saving and environment-friendly effects are achieved.

A furnace type efficient recovery system for flue gas waste heat of cooled sinter comprises an air blower, a cooling furnace, a primary dust remover, an emergency blow-off valve, a waste heat boiler, a secondary dust remover, a draft fan and a chimney. An outlet of the air blower is communicated with a cooling air inlet on the lower portion of the cooling furnace. A flue gas outlet on the upper portion of the cooling furnace is communicated with the primary dust remover, the waste heat boiler, the secondary dust remover, the draft fan and the chimney through pipelines successively. The emergency blow-off valve is arranged on a pipeline between the primary dust remover and the waste heat boiler. A connection pipeline is arranged between the draft fan and the air blower. The furnace type efficient recovery system for flue gas waste heat of cooled sinter has the advantages that the sinter quality is improved, the sinter return rate is reduced, flue gas parameters are stable, the system own power consumption rate is reduced, and the energy-saving effect is apparent.