34results about How to "Lower latent heat of vaporization" patented technology

The composite modifying catalyst for alcohol-ether fuel is compounded with zinc peroxide 5-15 weigh portions, dimethyl carbonate 15-35 weigh portions, vat yellow GCN 5-15 weigh portions, cyclohexylamine 3-10 weigh portions, and isooctyl nitrate 15-30 weigh portions, and through mixing at normal temperature. The alcohol-ether fuel with the composite modifying catalyst may have great methanol adding ratio while ensuring the combustion efficiency, fuel consumption, dynamic performance and other indexes.

The invention provides an absorption distillation method for using adsorption resin to treat waste water containing dimethyl formamide, belonging to the technical field of treatment of waste water containing dimethyl formamide, and solving the defects of the multi-column distillation and extraction-distillation process in prior art. The absorption distillation method for using adsorption resin totreat the waste water containing dimethyl formamide comprises the steps of using macroporous absorption resin to absorb before distillation of the waste water containing dimethyl formamide, using desorption agent to desorbing the resin, getting the mixed liquid of dimethyl formamide DMF and the desorption agent, delivering the mixed liquid into a rectifying column to implement normal pressure separation or reduced pressure separation, and getting the distillated dimethyl formamide DMF from the bottom of the rectifying column. Compared with the prior art of DMF waste water energy-saving recovery, the invention further reduces DMF recovering energy consumption without causing secondary pollution under the condition of ensuring high DMF recovery ratio, and has good practicality and economic performance.

The invention relates to application of a convectional heat transfer mode to the material freeze drying process. An application method is mainly characterized in that in the traditional freeze drying process, when solid water (or other solvents) starts to vaporize, a proper amount of steam is led to give steam latent heat to the solid water, so that the solid water is sublimated to vapor in an accelerated mode; and meanwhile, by utilizing kinetic energy which is released when the steam expands instantly, the vapor gets rid of the restraint of surface tension and quickly flees from the surfaces of materials to be discharged out of a freeze drying cavity, and therefore the purposes of achieving complete freeze drying and shortening the drying time are achieved.

The present invention relates to applications of a convection heat transfer method in a dianhydrodulcitol freeze drying process. According to the present invention, by using the convection heat transfer type freeze drying preparation method of the dianhydrodulcitol freeze drying powder, drying is performed according to the predetermined freeze-drying process to obtain the freeze drying product of the dianhydrodulcitol or the composition thereof, the melting point is high and is in the range of 99.5-103.5 DEG C, the time for achieving the complete freeze-drying state is short, the freeze drying product is the loose amorphous body, the melting point is not changed after the freeze drying product is stored for 200 days at a room temperature in a sealed manner, and the quality stability of the freeze drying product of the present invention is significantly superior to the quality stability of the dianhydrodulcitol freeze drying powder prepared in the prior art.

The invention discloses a box-type vacuum drying device for urban sludge, which comprises a drying box connected with a vacuum pump; the drying box is provided with an air distribution plate to divide it into an upper material delivery area and a lower air supply area The air distribution channel is arranged on the air distribution plate; the material conveying system is arranged in the material conveying area, and the heat exchanger is installed in the air supply area. The air channel leads into the material conveying area to heat and dry the materials conveyed by the material conveying system; the drying box is also connected with a hot air circulation system. The invention is suitable for drying urban sludge, provides favorable material conveying conditions and heat medium pressure, temperature, and wind conditions for sludge drying, improves sludge drying rate, and has good environmental protection without foul smell in the drying process.

The invention relates to a butanediol spraying vacuum pump. The pump of the invention is characterized in that a primary butanediol sprayer is connected with a lower portion of a primary condenser, an upper portion of the primary condenser is connected with an upper portion of a secondary butanediol sprayer, a lower portion of the secondary butanediol sprayer is connected with a lower portion of a secondary condenser, an upper portion of the secondary condenser is connected with an upper portion of a third butanediol sprayer, a lower portion of the third butanediol sprayer is connected with a lower portion of a third condenser, an upper portion of the third condenser is connected with a lower portion of a fourth butanediol sprayer, a third auxiliary steam sprayer is communicated with an upper end of the third condenser, an upper portion of the fourth butanediol sprayer is communicated with an upper portion of a fourth condenser, a lower portion of the fourth condenser is connected with a vapor-liquid separator by a liquid-ring vacuum pump, one end of a heat exchanger is communicated with the liquid-ring vacuum pump and the other end of the heat exchanger is communicated with the vapor-liquid separator. The butanediol spraying vacuum pump has the advantages that: no waste liquid is discharged; the energy consumption is reduced; the steam spray vacuum pump in the invention has no moving part during runtime, the butanediol spraying vacuum pump is suitable for long-term and continuous operation, and the maintenance period is prolonged.