31results about How to "Lower liquefaction costs" patented technology

The invention discloses a method for preparing biodegradable rigid polyurethane foam with liquefaction products of bamboo waste, which comprises the following steps: 1 mass portion of crude glycerin / polyethylene glycol liquefying solvent and 0.02-0.04 mass portion of concentrated sulfuric acid are added into a reaction vessel, heated till the temperature reaches 120-180 DEG C after a reflux condensation tube is connected to the reaction vessel; 0.2-0.5 mass portion of crushed and dried bamboo waste is added, reacted for 90-180min with stirring, taken out and cooled and neutralized by MgO tillbeing neutral; 1 mass portion of liquefaction products of bamboo waste, 0.02-0.08 portion of a dibutyl tin dilaurate / triethylene diamine mixed catalyst, 0.02-0.06 portion of silicone oil, 0.02-0.1 portion of water and 0.1-0.15 portion of fire retardant are added into a container, premixed for 20-30s when stirred at 2,000r / min, added with sufficient PAPI with the molar ratio between isocyanato-NCOin PAPI and hydroxyl group-OH in bamboo waste liquefaction products being 0.6-1.2, stirred for 10s-15s at 1,000r / min, put into a mould, foamed with standing at room temperature, placed for slaking and mould separating at room temperature for 24h-72h after reaction. The method fully utilizes resources, reduces liquefaction cost, and has a mild reaction temperature and stable liquefaction products;the performance of obtained foam meets the national standard and biodegradability.

The invention discloses a gaseous carbon dioxide liquefaction method, comprising the following steps: 1) compression and cooling of carbon dioxide raw material gas, 2) purification of gaseous carbon dioxide after pressurization, 3) precooling of purified gaseous carbon dioxide and cooling of non-condensable gas 4) Part of the pre-cooled gas carbon dioxide is cooled into liquid carbon dioxide through a low-temperature liquefaction process, and 5) the liquid carbon dioxide is removed from the non-condensable gas in the liquid carbon dioxide through a low-temperature rectification process. The invention does not need to use liquefied ammonia as a refrigerant to cool down and liquefy gaseous carbon dioxide, which improves the safety of the system, and uses low-temperature rectification towers and low-temperature heat exchangers to replace expensive refrigeration equipment, which is more conducive to the liquefaction of gaseous carbon dioxide and greatly reduces gas The cost of carbon dioxide liquefaction realizes the recycling of carbon dioxide gas.

The invention discloses a method for direct liquefaction of biomass. The method includes the following steps: (1) mixing the biomass, a hydrogenation catalyst and a hydrogen donor solvent to obtain abiomass slurry; (2) performing first liquefaction reaction on the biomass slurry and hydrogen to collect a first reaction product; (3) performing second liquefaction reaction on the first reaction product and hydrogen to collect a second reaction product; (4) performing first gas-liquid separation on the second reaction product at 290 to 460DEG C to collect a first liquid phase and a first gas phase; (5) performing second gas-liquid separation on the first gas phase at 30DEG C to 60DEG C to collect a second liquid phase, and mixing the first liquid phase and the second liquid phase to obtain aliquid phase; (6) performing first distillation on the liquid phase to collect a light fraction and a heavy fraction; and (7) performing second distillation on the heavy fraction to separate distillate oil and residue, wherein the light fraction and the distillate oil are liquefied liquids. The liquid yield obtained by the method is high, and the residual solid content in the liquids is low.

The invention provides a preparation method for a wood liquefacient. A discarded PET bottle is crashed into powder, which is mixed with polylol and added with 0.01-0.5wt% of catalyst, and the mixtureis stirred uniformly and heated to react, thus obtaining the wood liquefacient. The invention also relates to a method for preparing a surfactant by using the liquefacient to liquefying wood, which includes the steps: 0.5-10wt% of inorganic acid catalyst and glycerin are added into the mixture of the liquefacient and the wood meal of broad leaved forests or coniferous forests, which reacts by heating to obtain a coarse liquefied wood product; the product is cooled to room temperature, diluted in absolute ethyl alcohol or acetone and then filtered in vacuum to form the filtrate, which is subsequently decompressed and distilled so as to obtain refined liquefied wood; the sodium hydroxide solution of the fully dissolved liquefied wood is added with propylene oxide according to the mass morality of total hydroxide radical to propylene oxide being 1:3-10 for reaction, and then epoxy ethane is entered for end capping, after that, the pH value is adjusted to 7, then the liquefied wood polyethenoxy ether of the surfactant is obtained as the final product.

The invention discloses a method for direct liquefaction of biomass. The method comprises the following steps: (1) mixing biomass, a hydrogenation catalyst and a hydrogen-donating solvent to prepare a biomass slurry; (2) performing a first liquefaction reaction on the biomass slurry and hydrogen, and collecting the first reaction product; (3) carry out the second liquefaction reaction of the first reaction product and hydrogen, and collect the second reaction product; (4) carry out the first gas-liquid separation on the second reaction product at 290-460 ° C, and collect the first liquid phase and the second reaction product A gas phase; (5) performing a second gas-liquid separation on the first gas phase at 30-60°C, collecting the second liquid phase, mixing the first liquid phase and the second liquid phase to obtain a liquid phase; (6) performing a liquid phase on the liquid phase The first distillation collects the light distillate and the heavy distillate; (7) performs the second distillation on the heavy distillate to separate the distillate oil and residue, and the light distillate and distillate oil are liquids obtained from liquefaction. The yield of the liquid obtained by the above method is high, and the residue solid content in the liquid is low.

The invention relates to the technical field of clean energy, in particular to a process for smelting coal and biomass. The coal and biomass materials are subjected to 'crushing, compression and crushing again' treatment, and biomass coal oil slurry with high solid content and capable of being conveying stably by a pump is successfully obtained. The biomass coal oil slurry is subjected to first liquefaction reaction and second liquefaction reaction sequentially, so that the fact that the biomass is completely liquefied into liquid phase and the yield of the liquid is increased; through twice gas and liquid separation, oil products are enriched and the residues in the oil products are enriched and caked; and through first distillation and second distillation, the yield of the liquid oil isfurther increased, the residues in the liquid oil is further enriched and caked and is discharged to the outside through the bottom of a distillation device, the residues are prevented from entering the subsequent process and the residue solid content of the liquid oil is reduced; and through test, the yield of the liquid oil is above 98 percent by weight and the residue solid content of the liquid oil is less than 0.5 percent by weight.

The invention provides a method for catalyzing waste of crops to be liquefied by microwave heating, which comprises: the waste of crops is added into polylol and sulphuric acid for microwave heating, the temperature is controlled to be 150-180 DEG C, and the liquification reaction is carried out for 10-30min. The method utilizes microwave auxiliary heating and reaction catalytic effect to realizerapid liquification for the waste of crops, thus greatly improving the liquification efficiency of the waste of crops and the liquification effect thereof, and leading the liquification efficiency toreach over 90%; the operation of the method is rapid, simple and convenient as well as efficient, so that the liquification cost of the waste of crops can be greatly reduced.

The invention relates to a method and system for stably supplying air with low energy consumption. According to the method, at least part of each of first heat exchange airflow, second heat exchange airflow and third heat exchange airflow is treated to obtain first airflow to be supplied and second airflow to be supplied. The system comprises a piston air booster, an efficient postcooler, a booster expansion turbine, a main heat exchanger with five separated fluid loops, an upper rectifying tower body, a lower rectifying tower body, a subcooler with four separated fluid pipes, a low-temperature liquid nitrogen and a low-temperature liquid nitrogen. Originally-wasted nitrogen generated by air separation is liquefied, the liquefaction cost of nitrogen is reduced as the cooling capacity of liquid nitrogen is fully utilized, benefits generated by the liquid nitrogen basically offset the cost increased by use of the liquid nitrogen, and the overall energy consumption is reduced on the whole.

The invention relates to a novel method for liquefying a plant biomass and waste polyester mixed supercritical fluid, which comprises the following steps of placing plant biomass, polyester, a catalyst and a liquefying agent into a reaction kettle with a stirrer, raising the temperature of the reaction kettle to 230-280 DEG C, pressurizing to 5-8MPa, preserving the temperature under the state for5-40min, introducing cooling water when being naturally cooled to 100 DEG C after the liquefying is finished to cool the reaction kettle to room temperature; filtering reactant mixture in the reaction kettle by using a Buchner funnel; extracting obtained filtrate and residue by using an organic solvent; and distilling obtained extract liquor and extract by using a rotary evaporator, wherein the product remained in a distillation flask after the distillation is the biomass liquefied oil. The invention develops a new way of utilizing the plant biomass and the waste polyester, realizes the moderation of the liquefying condition of the plant biomass, improves the quality of the biological oil because of the molecular weight of the biological oil is lower, and improves the utilization efficiency of the plant biomass and the waste polyester.

The invention relates to the field of biological energy sources, in particular to a direct biomass liquefaction method. The preparation method of biomass slurry comprises the steps of sequentially performing drying, primary crushing, compression and secondary crushing on vegetable oil residue, mixing with a hydrogenation catalyst and a vulcanizer to form a mixture, adding the mixture into a hydrogen-donating solvent for grinding and slurrying, and preparing the biomass slurry with a vegetable oil residue concentration of 50-65wt%. According to the method, a treatment technology of the compression and the crushing for twice is performed on the vegetable oil residue initiatively; the volume of the vegetable oil residue is reduced greatly; the dispersion of the vegetable oil residue over an oil product is facilitated; a content of the vegetable oil residue in the oil product can be increased; a concentration of a reaction material is increased; the biomass conveying capacity of a pump inunit time is increased; and the smooth operation and conveying of the pump are ensured.

The invention provides a natural gas precooling device and a precooling control method. The precooling device comprises a shield pump, a barrel pump, a heat exchanger and a cooling medium processing device. The precooling control method comprises the steps that pressure in the barrel pump is controlled to stay within a preset pressure range; the shield pump is controlled to transport a low-temperature liquid cooling medium in the barrel pump to the front end of a cold box system; the heat exchanger is controlled to utilize the low-temperature liquid cooling medium to conduct precooling treatment on natural gas at the front end of the cold box system, so that the natural gas of a preset temperature and a gaseous cooling medium of the preset temperature are output; and the cooling medium processing device is controlled to convert the gaseous cooling medium in the barrel pump into the low-temperature liquid cooling medium in order to facilitate reclamation. According to the natural gas precooling device and the precooling method, the natural gas can be precooled, the liquefaction ratio of the natural gas can be improved when precooled natural gas is subjected to liquefaction, recycling gas is reduced, and liquefaction cost of the natural gas is lowered.