31results about How to "Reduce heat transfer load" patented technology

The invention provides a separated treatment and resource utilization technological method and device for carbon fiber production wastewater. The device comprises a first vacuum pump unit, a second vacuum pump unit, an acrylonitrile removing tower, a dimethyl sulfoxide concentrating tower, a crude product tower and a refining tower. According to the method, wastewater containing 0.5%-1% of acrylonitrile and 1%-5% of dimethyl sulfoxide enters the acrylonitrile removing tower and is subjected to acrylonitrile removal through pressure reduction for separated treatment, tower bottom solution wastewater is subjected to water removal through pressure reduction in the dimethyl sulfoxide concentrating tower and the crude product tower, the content of dimethyl sulfoxide is up to 99%, the dimethyl sulfoxide is subjected to pressure-reducing distillation in the refining tower, and accordingly, dimethyl sulfoxide with the purity higher than 99.97% is obtained. According to the method and the device, the wastewater is subjected to acrylonitrile removal through pressure reduction for separated treatment, the environmental protection treatment problems that the wastewater containing acrylonitrile is difficult to degrade, the treatment cost is high and the like are solved, distillation extraction and high-purity refining recovery of low-concentration dimethyl sulfoxide in the wastewater are realized synchronously, the technological process is simple, the resource recovery efficiency is high, the purity of recovered dimethyl sulfoxide is high, and the wastewater treatment cost is greatly reduced.

This invention relates to a multistage solution dehumidification method characterizing the solution dehumidification is classified into two or more stages, each stage solution circulates independently with different concentration, yet single-way transition exists between stages from high to low density and the most condensed solution stage is supplemented a certain amount of solution from outside and the weak solution stage exhausts a certain amount of solution, then the being processed gas will be dried via stages. This invention utilizes various cooling and gas-liquid contact way flexiblely.

The invention discloses an ethane recovery method with an absorption tower suitable for rich gas. Raw material gas is cooled by a first cold box and then enters a separator for pre-separation; a gas phase separated by the separator enters a second cold box and is further cooled and then enters a low temperature separator; a gas phase separated by the low temperature separator totally enters the expansion end of a turbo-expander for expansion cooling, and then enters the middle-upper part of a demethanizer, a part of condensate of the bottom of the absorption tower is reheated in the first coldbox and is gasified in a large amount mode and then enters the bottom portion of the absorption tower, and the other part of the condensate is directly connected into the middle of the demethanizer;the gas phase of the top of the absorption tower is discharged and deep-cooled, and then is subjected to throttling and cooling to enter the upper portion of the demethanizer; the gas phase of the topof the demethanizer is subjected to heat transfer and heating and pressurization, and then transported outwards after cooled by an air cooler; and a condensate product at the bottom of the demethanizer enters subsequent fractionation processing units such as the demethanizer for processing. The tower overhead feed enriched with more methane can enable a better absorbing and cooling effect on theupper portion of the demethanizer, and the recovery rate of the ethane is improved.

The invention discloses a method of reducing the interstage temperature of a propane compressor in a propane compressor cycle refrigerating system, and the method comprises the flowing steps: communicating a propane accumulating tank in the propane compressor cycle refrigerating system with each anti-surge pipeline or return pipeline, and arranging throttle valves the communicated pipelines; and arranging adjusting valves on the pipelines through which the propane accumulating tank is communicated with the anti-surge pipelines or the return pipelines. The method of reducing the interstage temperature of the propane compressor in the propane compressor cycle refrigerating system can be used for effectively improving the working efficiency of the compressor, reducing the heat exchange load of a heat exchanger at the outlet of the compressor, and eliminating the influence of change of interstage temperature of the compressor on the frige heat exchanger in low-load running working conditions.