33results about How to "Increase water vapor content" patented technology

This invention relates to the recovery of energy in the manufacture of sulfuric acid, and more particularly to enhanced recovery of energy from the absorption of wet SO3 in sulfuric acid. The invention is further directed to control of mist formation during SO3 absorption, and of the sulfuric acid mist content of the gas stream leaving the SO3 absorption step in a process wherein SO3 absorption energy is recovered from absorption acid in useful form.

The invention relates to a method of implementing high pressure fluidization blast using steam in place of air, characterized in that: steam is used for high pressure fluidization blast in normal running of a boiler. The method includes: connecting a turbine exhaust or intermediate extraction with a stock recycler using a steam conduit; starting high pressure fluidization blower and fluidizing recycle material in the stock recycler using air when the boiler begins to start; opening stop valve of the turbine steam conduit, fluidizing recycle material in the stock recycler using steam, shutting down the high pressure fluidization blower and closing the stop valve when the temperature of recycle material in the stock recycler is above 300 Celsius degree, the fluidization steam vapor source pressure parameter is greater than 60Kpa, and the superheat degree is larger than 30 Celsius degree; starting the high pressure fluidization blower, fluidizing recycle material in the stock recycler using air, and closing the stop valve on steam turbine when the temperature of the stock recycler is under 300 Celsius degree in blow off process of the boiler. Advantages of the invention consist in that coking of the stock recycler or other high temperature zones can be prevented or abated and boiler operation reliability can be improved by using steam for replacing high pressure fluidization blast. At the same time, circulating fluid bed boiler desulfurizer utilization rate can be improved, Nox discharge concentration can be reduced, and power plant running cost can be saved by utilizing steam fluidization.

The invention relates to a production process of DDGS feed. The production process successively comprises the following steps: separating waste liquor of an alcohol plant into wet alcohol residues and clear liquid; concentrating the clear liquid into concentrated liquid; feeding the wet alcohol residues to a first tube bundle dryer, carrying out first-stage drying and controlling return ratio; after first-stage drying, carrying out first pulp adding by using the concentrated liquid; after mixing evenly, feeding into a second tube bundle dryer, carrying out second-stage drying and controlling return ratio; after second-stage drying, carrying out second pulp adding by using the concentrated liquid; after mixing evenly, feeding into a third tube bundle dryer, carrying out third-stage drying and controlling return ratio; defining alcohol residues discharged after third-stage drying as the DDGS feed; and cooling the DDGS feed in a multi-stage reverse flow cooling tower. High-quality tail gas of the first tube bundle dryer and the second tube bundle dryer and low-quality tail gas of the third tube bundle dryer are respectively subjected to dust removal and waste heat recycling, and the recycled heat is used for concentrating the clear liquid into the concentrated liquid step by step. The production process of the DDGS feed is low in steam and power consumption, high in drying efficiency and good in product quality.

The invention provides a fuel cell cathode side humidity adjustment control system and method. The invention quickly and accurately obtains the cathode relative humidity of the battery stack through the voltage variation rule of the fuel cell. Compared with the existing humidity sensor feedback control method, the control sensitivity of the invention is higher and the detection accuracy is significantly higher. Improvement can limit the loss of fuel cells caused by dry film and water blocking. The invention can control the water vapor content at the cathode of the fuel cell within a certain range, thereby improving the working efficiency of the fuel cell. The invention intelligently adjusts the communication relationship between the low-level connection port of the cathode chamber of the battery stack, the automatic discharge component and the humidifier through the gas guide switching component, and then can cooperate with the humidifier to send air with high relative humidity into the high-level connection port. The cathode chamber, so as to properly increase the water vapor content of the cathode chamber to improve the working efficiency of the fuel cell.

The invention discloses a system for reducing the NOx emission of a synthetic gas gas turbine. The air separation unit communicates with the intake pipeline of the gas turbine compressor through a pipeline through a heating humidifier, and the heated and humidified nitrogen is in a low pressure state (close to normal pressure) It is passed into the intake pipeline of the compressor and mixed with the inlet air in an appropriate proportion, and the carbon dioxide produced by the coal-to-gas decarbonization unit can be further passed through the pipeline through a heating humidifier at a low pressure state (close to normal pressure). into the air intake line of the compressor and mixed with the air therein, and the mixed gas is sent into the gas turbine compressor to reduce the oxygen concentration of the air entering the gas turbine compressor, thereby reducing the oxygen concentration of the air entering the combustion chamber of the gas turbine, realizing The purpose of reducing NOx emissions from syngas gas turbines.

The invention relates to a treatment method for flue gas and flue gas desulfurization wastewater. In the flue gas / desulfurization wastewater heat exchanger, the flue gas is used to exchange heat for the desulfurization wastewater, and a nozzle is set at the outlet of the flue gas to spray NaOH solution to make the flue gas At this time, the flue gas enters the bag filter to remove dust and sulfate / sulfuric acid droplets, and then enters the desulfurization tower; desulfurization purification and heating are carried out in the desulfurization tower, and the waste water at the bottom of the tower is used as The absorption liquid is circulated, and the others enter the plate heat exchanger in the form of desulfurization wastewater; the plate heat exchanger uses the steam condensed water generated by the heating coil in the exhaust cylinder to preheat the desulfurization wastewater, and after preheating, the wastewater enters the flue gas / desulfurization wastewater exchange heater. On the basis of making full use of the waste heat of the flue gas, the present invention realizes the dual purpose of purifying the flue gas to meet the emission requirements and zero discharge of flue gas desulfurization waste liquid, and simultaneously eliminates "white smoke" and "blue smoke", and reduces the cost of flue gas desulfurization. and the comprehensive treatment cost of desulfurization waste liquid.

The invention discloses a deep heat recovery device and a deep heat recovery method for boiler smoke, which belong to the technical field of waste heat recovery. The deep heat recovery device disclosed by the invention comprises a boiler, a smoke-backwater heat exchanger, and N stages of heat recovery devices which are serially arranged, wherein N is not less than 1; each stage of the heat recovery device comprises a nozzle, a smoke-air heat exchanger, a smoke water-condensing groove, a smoke water-condensing tube, a heat recovery water collection groove, a heat recovery water drainage tube, and the like; each stage of the heat recovery device increases the equivalent heat capacity of air through the spray humidification for an air side, thus greatly improving the heat-carrying capacity of air, enabling the smoke discharge temperature of the boiler to be lower, and realizing deep heat recovery for the boiler smoke from the air side. According to the deep heat recovery device and the deep heat recovery method disclosed by the invention, heat exchange is carried out by virtue of the inlet air and smoke of the boiler, the water content of air is increased by means of spray humidification for the air side for air inlet, and the equivalent heat capacity of air is increased, thus realizing a higher heat exchange amount, effectively lowering the smoke discharge temperature of the boiler, and adequately recovering the waste heat of smoke; in addition, due to the increase of the humidity of a fuel, a combustion temperature can be lowered, and the formation of NOx can be reduced.

The invention relates to a production technology of corn pulp addition fibers. The production technology sequentially comprises the following steps of separating corn fibers in a corn starch plant into dehydrated corn fibers and dehydrated fluid, conveying the dehydrated corn fibers into a first pipe bundle drier for first-stage drying, and controlling a product return ratio; after the first-stage drying, performing primary pulp addition with thick corn pulp, performing uniform mixing to obtain a first mixture, conveying the first mixture into a second pipe bundle drier for second-stage drying, and controlling a product return ratio; after the second-stage drying, performing secondary pulp addition with thick corn pulp, performing uniform mixing to obtain a second mixture, conveying the second mixture into a third pipe bundle drier for third-stage drying, and controlling a product return ratio; enabling discharged corn fibers after the third-stage drying, namely corn pulp addition fibers to enter a multi-stage countercurrent cooling tower for cooling; and respectively performing dust removal and residual heat recover on the high-quality tail gas of the first pipe bundle drier, the high-quality tail gas of the second pipe bundle drier, and the low-quality tail gas of the third pipe bundle drier, and gradually concentrating thin corn pulp into the thick corn pulp through recovered heat. The production technology of the corn pulp addition fibers disclosed by the invention is low in steam consumption and power consumption, high in drying efficiency and good in product quality.

The invention discloses a washing treatment process for synthesis gas. The washing treatment process comprises the following steps: after black water from a shock chilling chamber of a gasification furnace is filtered and ash dreg is removed, the black water enters a buffering pot; after shock chilling water from the buffering pot passes through a circulating pump, the shock chilling water enters the shock chilling chamber of the gasification furnace; after synthesis gas is contacted with introduced washing water by a washing tower and enters a follow-up conversion working section after being contacted with converted condensing water and desalting and oxygen-removing water for dust removal; part of the washing water from the washing tower enters the shock chilling chamber of the gasification furnace; after dreg is filtered by a filter, the black water from the washing tower and the other part of the washing water are combined and then enter the buffering pot; after the washing water from the buffering pot is pressurized by a circulating pump, part of the washing water enters a venturi scrubber and the other part of the washing water enters the washing tower to be circularly used. According to the washing treatment process for the synthesis gas, the black water is not discharged out so that the pollution and the water consumption can be relieved; the wastewater discharge is reduced by 0.36 ton; the operation period of a device is prolonged and the treatment of ash water is very simple and common; the ash water does not need to be subjected to temperature reduction treatment so that the system has the relatively high water vapor content and the temperature of the synthesis gas is increased; the washing treatment process of the synthesis gas is good for the follow-up conversion working section.

The invention relates to a seawater desalination process with low cost, which utilizes the condensate of the vapor cycle of a thermal power plant or a nuclear power station as a heat source, heats seawater to the temperature of 60-80 DEG C and atomizes the seawater in an atomizing chamber. On the other hand, natural air is heated after being washed and humidified, enters the atomizing chamber andcontacts the atomized high-temperature seawater mist flow so as to enable part of the atomized high-temperature seawater mist flow to be instantaneously vaporized; fresh water mist droplets generatedby the atomization of the high-temperature seawater are lifted by the kinetic energy of air to move upwards; moreover, because the density of water is different from the density of salt, the water and the salt are separated in the movement process; the two blasts of fresh water airflow are cooled by the raw material of cold seawater simultaneously and condensed into fresh water, the heated raw material of the cold seawater is used for washing and humidifying the natural air, and clean air carrying water vapor is recycled after the clean air carrying the water vapor is cooled; and the entire process flow does not consume extra heat energy and only consumes the air and less electric energy required by the transportation of the seawater. The process recovers energy in the condensate of the vapor cycle of the thermal power plant or the nuclear power station, produces the fresh water in large amounts and also produces a by-product of concentrated seawater.

The invention discloses an integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis. The system comprises a cement firing system, a crusher, a pre-drying machine, a roll squeezer, a catalyst storage bin, a drying crusher, a vertical drying cylinder and a cyclone separator. The process sequentially comprises the following steps of: (1) initially crushing raw coal of the lignite into coal briquettes; (2) pre-drying the coal briquettes and rolling to crush the coal briquettes to form coal particles; (3) crushing the coal particles to be coal powder through the drying crusher; (4) carrying out heat exchanging, drying and purification on the fine coal powder through the vertical drying cylinder; and (5) separating the purified lignite from the gas through the cyclone separator to obtain a purified lignite finished product. The invention has the advantages that the afterheat in the cement production is fully utilized so as to save energy, reduce consumption and decrease the emission of carbon dioxide; and by utilizing the original process equipment, in the cement production, an additional device is not needed, therefore, the investment is less and the profit is great, and 10,000,000 Yuan on 2500T / d cement production line can be saved every year.

The invention relates to the field of recovery and treatment of flue gas from heating furnaces, in particular to a waste heat recovery system and combustion system of flue gas from heating furnaces. It includes a spray cooling tower and an air humidification tower. The spray cooling tower includes a cooling tower body and a first spray device for spraying cooling liquid. The side of the cooling tower body relatively close to the bottom of the tower is provided with a flue gas inlet. The shower device is set in the cooling tower body and is relatively close to the top of the tower, so that the flue gas and the cooling liquid form convection; the air humidification tower includes the air humidifier body and the second spray device for spraying liquid, and the air humidifier body is relatively close to the tower There is an air inlet on one side of the bottom, and the second spraying device is arranged in the air humidifier body and is relatively close to the top of the tower. The liquid outlet of the cooling tower body is connected to the second spraying device, so that the air and the liquid form convection, The air is heated and humidified. It can effectively recover and utilize the waste heat of the flue gas of the heating furnace while reducing the content of NOx in the flue gas.