126results about How to "High heat and mass transfer" patented technology

The invention discloses a device for rapidly and continuously preparing a gas hydrate. The device comprises a reactor with an outer water jacket, a gas supply unit for supplying a gas source to the reactor, an ice liquid supply unit for supplying an ice liquid to the reactor, a temperature control unit for controlling the temperature of the outer jacket, a hydrate filtering and collecting unit connected to the reactor and used for filtering and collecting produced hydrate crystals, and a data acquisition and processing unit for acquiring and recording the temperature and pressure data of the reactor. The rear end of the hydrate filtering and collecting unit is connected to the ice liquid supply unit through a quick-connecting valve. The device solves the problem that the conventional hydrate formation device has no a complete hydrate formation process, produces internal retention in the stirred slurry or on a magneton and has no a continuous reaction process. The experimental device issimple and economical, is easy to operate, produces a complete and uniform gas hydrate and improves the efficiency of gas storage and transportation.

The invention provides an energy saving system for adopting an absorption heat pump to deeply recover smoke waste heat for central heating and belongs to the technical field of recovery and utilization of smoke waste heat of boilers of thermal power plants. The recovered smoke waste heat is used for heating return water of a heat supply network in a central heating system. Firstly, countercurrentheat exchange is conducted between low-temperature high-humidity smoke coming out from a desulfurizing tower and spraying circulation water in a smoke waste heat recovery tower in the smoke waste heatrecovery system, and recovered smoke waste heat is stored in high-temperature circulation water. Smoke and water direct contact type heat exchange technology is adopted for the smoke waste heat recovery tower in the energy saving system, heat and mass transfer effects are improved, heat exchange capability is enhanced, meanwhile desulfurizing capability is achieved, the desulfurizing effect of athermal power plant can be met, a smoke waste heat recovery and desulfurizing integrated function is achieved, and pollutant emission can be further lowered. According to the energy saving system, heating capacity of the thermal power plant is enhanced, energy utilization efficiency is improved, the environmental influence of the thermal power plant is lowered, and economic benefits and environmental benefits are both achieved.

The present invention relates to a lithium bromide absorption type refrigeration equipment formed from all plate fin type thermal mass exchange. It mainly includes absorber, generator, evaporator, condenser and solution exchanger, etc. It is characterized by that the above-mentioned every component is formed from reasonably remoulded plate fin type thermal mass exchanger, and very componnet liquid can be effectively cooled or heated, so that its heat transfer and mass transfer capacity can be greatly raised.

The invention relates to a technique for preparing methane through straw stalks fermentation only based on multi-microorganism degradation, which comprises the following steps: A. physical and biologic comprehensive pretreatment is carried out on biomass straw stalk raw materials; B. the biomass straw stalk raw materials which are comprehensively pretreated are thoroughly degraded and thrown into an anaerobic fermentation reactor together with fermentation inoculation strains for anaerobic reaction and methane preparation; C. the output methane of the step B is desulfurized, enters into a gas-storing device and is delivered to users through a transmission pipeline network; D. methane residues and methane liquid of the step B after the anaerobic reaction are discharged, the methane residues can be used as solid organic fertilizer through physical separation, and the methane liquid refluxes to the anaerobic fermentation reactor for reutilization. The invention also discloses a device for preparing the methane through straw stalks fermentation only based on multi-microorganism degradation. The time of traditional technique for straw stalks pretreatment is 10-15 days; however, the time of the technique for straw stalks pretreatment is only 5 days and the degradation efficiency of the technique is 1.3-1.5 times as high as that of the traditional technique.

The invention relates to the technical field of fluidized decomposition and calcination of gypsum, and particularly discloses a process for producing sulfuric acid by spraying, fluidizing, decomposing and calcining gypsum efficiently. The process comprises the following steps: gasifying brimstone; preheating raw gypsum; spraying, fluidizing and decomposing gypsum to prepare calcium sulfide and sulfur dioxide; preparing sulfur dioxide by calcining and decomposing the prepared calcium sulfide and heated gypsum; preparing sulfuric acid by treating the tail gas. Through the adoption of spraying and fluidizing technology, out-kiln decomposition of gypsum during acid making is realized; the calcium sulfide can be prepared efficiently with low cost; then the calcium sulfide and the preheated gypsum are calcined together for decomposition to prepare the sulfur dioxide. Therefore, the process is absolutely an excellent process for industrialized continuous production, is high in economic benefits and energy utilization ratio.

The invention discloses a liquid-accommodation diversion type drop pipe comprising a pipe body, overflow weirs, single-stage or multiple-stage liquid accommodating chambers clinging to the tower wall and pipe wall, liquid accommodating plates of the bottom of the pipe body and drop plates. According to the drop pipe, the liquid phase and gas phase flowing and contacting state in a tower is changed, the gas and liquid contacting and separating strength is enhanced, the purposes of improving the tower distillating efficiency and operational flexibility and increasing the tower flux can be achieved, the tower blockage prevention capability is improved, the tower plate pressure drop is reduced, energy consumption and equipment investment are reduced, and the comprehensive performances of the tower are improved.

A shell tube type adsorption bed with puncture membrane type adsorption mass tubes comprises a shell, and further comprises a metal mesh, activated carbon, heat conduction tubes and the puncture membrane type tubes, all of which are arranged in the shell. The shell is provided with a heat conduction liquid inlet and a heat conduction liquid outlet which are communicated with the two ends of each heat conduction tube respectively. The shell is provided with an air outlet hole, and the metal mesh is arranged on the inner side face of the shell. The diameter of holes in the metal mesh is smaller than the grain diameter of the activated carbon. The heat conduction tubes and the puncture membrane type tubes are arranged in parallel and alternately arranged. The activated carbon is arranged in gaps between the heat conduction tubes and the puncture membrane type tubes. The puncture membrane type tubes are made of membranes and comprise main mass transfer tubes and bypass branch tubes vertically arranged on the main mass transfer tubes. The main mass transfer tubes are provided with mass transfer holes, and the diameter of the mass transfer holes is smaller than the grain diameter of the activated carbon.

The invention discloses a composite adsorbent and a preparation method thereof. The composite adsorbent comprises calcium chloride, expanded graphite and polyethylene oxide. According to the composite adsorbent and the preparation method thereof, the heat and mass transfer ability of the adsorbent is improved to prevent the agglomeration of the adsorbent through the mixing of the expanded graphite and the calcium chloride, and meanwhile, the phenomena of loosening, layering, falling off and the like of the adsorbent are avoided through the addition of the polyethylene oxide, and therefore the mechanical performance of the adsorbent is improved; the method for preparing the composite adsorbent provided by the invention is simple and feasible, and is conveniently popularized.

The invention discloses a high-efficiency reactor for hydrated salt chemical energy storage. The high-efficiency reactor comprises a heat insulation container, a column body for wrapping hydrated salt, a heat exchange pipe, fins, hydrated salt and pipelines, wherein the column body is arranged in the heat insulation container; the heat exchange pipe is arranged at the center of the column body; the multiple fins are uniformly arranged between the heat exchange pipe and the column body; one end of each fin is connected with the outer wall of the heat exchange pipe, and the other end of the fin is connected with the inner wall of the column body; a space between the heat exchange pipe and the column body is filled with the hydrated salt; and the two pipelines are arranged on an upper end cover of the heat insulation container. The high-efficiency reactor for hydrated salt chemical energy storage disclosed by the invention can well enable reaction salt to react with steam; the reaction is faster and more thorough, and the heat transfer and mass transfer effect in a reaction process is obviously enhanced; irreversible loss caused by liquefaction of the hydrated salt due to excessive water absorption can be further effectively avoided, so that the number of times of recycling of an energy storage material is increased, and the service life of the material is prolonged; and meanwhile, the corrosion effect of the liquefied hydrated salt on the reactor is also avoided.

The invention provides a device for cooperatively enhancing the fluidization of nanoparticles by a centrifugal field and a sound field. The device comprises a feeding hopper (1), an annular air inlet chamber (2), a centrifugal fluidized bed body (3), a stepping motor (4), a discharging hopper (5), a bed body supporting frame (6), a cloth bag dust collector (7), a sounder (8), a loudspeaker (9), an air outlet (10), an annular air distribution plate (11), an air inlet (12), an inner discharging hole (13), a sealing gasket (14) and a right-angle transmission gear box (15). According to the device provided by the invention, the fluidization of the nanoparticles is enhanced through the centrifugal field and the sound field, and abnormal fluidization phenomena including channeling, slugging even normal fluidization and the like of the nanoparticles in a fluidized bed can be effectively eliminated; an agglomeration-crushing process of particle agglomeration is enhanced and mixing between the particles is enhanced; the heat and mass transportation capability between the particles and a main body is improved; process application and amplification are easy to realize; the device has strong operation controllability and is stable to operate.

The invention relates to a magnetic field array auxiliary resistance spot welding device and method for sheet metal materials. According to the device and method of the invention, on the basis of basic magnetic control resistance spot welding equipment, an exciting coil is replaced by a Halbach magnetic field array, a dynamic feedback system is additionally arranged, the system and the equipment can convert the magnetic field array; a nugget expansion mode magnetic field is formed in the pre-solidification stage of the resistance spot welding process in a non-contact mode, a circumferential acting force is applied to liquid metal in a resistance spot welding nugget to increase the size of a welding spot; the moment when the nugget begins to solidify is truly judged through the dynamic feedback system; the magnetic field array mode is converted when the nugget begins to solidify, a stirring enhanced magnetic field is formed; crystalline grains are refined, chemical components are homogenized, and crack sensitivity is improved; and finally, the comprehensive mechanical performance of a resistance spot welding joint is improved.

A cooling water tower of injection and wall stream free type is featured as opening horizontal seam on wall surface of pressure expansion section at cooling rower and setting stream guide plate at bottom edge of said wall surface for leading water from said wall surface to water collection tank, dropping water out from holes of said tank to separation chambers of arc shaped stream guide plate under said tank, flowing water out in uniform speed from holes at bottom of said separation chamber for entering water into packing layer uniformly.

The invention relates to complete countercurrent closed cooling tower with air inlets on an upper and a lower parts. A tube bundle is arranged on the upper part of the closed cooling tower, and fillers are arranged on the lower part. A fan is arranged on the top of the tower. A water collection disc is arranged on the bottom of the tower. The upper part of the tube bundle is provided with a water distributor. The water collection disc is connected with the water distributor by a pump. The upper and the lower parts of the two lateral sides of the cooling tower are separately provided with two air inlets-the upper air inlet and the lower air inlet. The other two lateral sides and a channel separator form an air exhaust channel. The air that enters into the cooling tower from the upper air inlet and flows downwards, after the air passes through the tube bundle, the air meets the air that enters into the cooling tower from the lower air inlet, flows upwards and passes through the fillers. The direction of the air is changed in the middle of the cooling tower. The air flows upwards through the air exhaust channel and is discharged from the top of the cooling tower. The air in the fillers flows along a reverse direction with the spray water which flows from top to bottom. The air in the tube buddle flows along a same direction with the spray water and flow along a reverse direction with the cooled fluid in the tube buddle. The countercurrent closed cooling tower can use pool typed water distribution system. The closed cooling tower can increase the flow area and the flow quantity of the air. The water distribution is uniform, and the effects of the heat transfer and mass transfer are improved.