10results about How to "Raise feed temperature" patented technology

The invention relates to the field of sludge drying, and particularly discloses a closed MVR sludge drying device which is characterized in that a drying conveying belt, a heating roller, a roller scraper, a discharging mechanism and a discharging conveying belt are mounted in a box body, a spiral feeder is mounted on the left side of the upper end of the box body and communicates with the box body through a feeding disperser, and a discharging conveying belt is mounted in the box body. The discharge hole is formed in the left side of the lower end of the box body; two layers of heating rollers are arranged in the drying conveying belt, a roller scraper is installed between the heating rollers, and a discharging mechanism is arranged at the right end of the drying conveying belt. The right end of the upper portion of the box body is sequentially connected with the filter, the vacuum pump and the compressor, the compressor is connected with a steam inlet of the heating roller through the three-way valve and the movable and static connector, and a steam outlet of the heating roller is connected with the steam-liquid separator. According to the MVR sludge drying device, direct mass and heat transfer between sludge and heating steam can be well avoided, and the working efficiency of the MVR sludge drying device is improved.

The invention belongs to the field of carbon dioxide methane reforming, and discloses a low-hydrogen-carbon-ratio synthesis gas preparation method and a low-hydrogen-carbon-ratio synthesis gas preparation system. The system comprises a dry reforming reactor, a carbon dioxide feeding pipeline, a methane feeding pipeline, a compression device, a hydrogen production reaction device, a reforming crude synthesis gas treatment device and a hydrogen production synthesis gas treatment device. The method not only solves the problems of easy catalyst deactivation, high energy consumption and the like in the technology for preparing the synthesis gas by reforming carbon dioxide methane, but also obtains the synthesis gas with low hydrogen-carbon ratio, and is especially suitable for being used as a raw material for preparing methanol and ethylene glycol. According to the invention, the purpose of increasing the yield of hydrogen (synthesis gas) can be achieved on the basis of not changing the existing hydrogen production furnace. As a typical blue hydrogen preparation method, carbon dioxide is turned into wealth, and economic and environmental benefits are obvious.

The present invention discloses a one-stage series hydrocracking method. The method comprises the following steps: (1) mixing feedstock oil with hydrogen and then entering a hydrocracking pretreatment reactor for pre-reaction; (2) the pre-reaction effluent of step (1) enters a hydrocracking reactor for a first hydrocracking reaction; (3) the first hydrocracking reaction effluent in step (2) enters a catalytic reaction distillation tower for a second hydrocracking reaction and rectification to obtain corresponding products. The method can effectively solve the problem of timely separation of reaction products from the reaction zone, improve the yield of the target product, and at the same time improve the hydrocracking reaction efficiency and reduce the energy consumption of the device.

The invention relates to a method for preparing synthesis gas, and the method comprises the following steps: carrying out first heating on a hydrogen production raw material, and sequentially feeding the hydrogen production raw material into a hydrogenation reactor and a hydrodesulfurization reactor to obtain a desulfurized hydrogen production raw material; and mixing the desulfurized hydrogen production raw material, water vapor and a carbon dioxide raw material, carrying out second heating to obtain a mixed raw material, feeding the mixed raw material into a radiation unit of a hydrogen production converter, carrying out a catalytic reforming reaction with a reforming catalyst to obtain a reformed crude synthesis gas, and carrying out heat exchange on the reformed crude synthesis gas and part of the carbon dioxide raw material. According to the invention, the reaction for preparing the synthesis gas by reforming is carried out in the hydrogen production reformer, and the problems of easy carbon deposition and short operation period of the reforming reaction in industrial production are solved by utilizing a high-temperature and water-vapor-containing environment in the hydrogen production reformer; the prepared high-temperature reformed crude synthesis gas exchanges heat with a carbon dioxide raw material, the feeding temperature is increased, the energy utilization efficiency of the hydrogen production reformer is improved, meanwhile, carbon dioxide is recycled, and near-zero emission of carbon dioxide is achieved.

The utility model discloses a novel heat exchange device which comprises an ethylbenzene tower, a tower top condenser, a reflux tank and a reboiler, the ethylbenzene tower is connected with the reboiler through a pipeline, a high-pressure steam feed line is connected with a shell pass inlet of the reboiler, heavy components are sent to a post-rectification system through a discharge line of the ethylbenzene tower, and the reboiler is connected with the tower top condenser. A tower top discharging line of the ethylbenzene tower is connected with a tube pass inlet of the tower top condenser, a temperature detector V and a temperature detector VI are arranged on a high-temperature condensate feeding and discharging pipeline respectively, a tube pass discharging line of the heat exchanger II is connected with a shell pass of the heat exchanger I, and a shell pass discharging line of the heat exchanger I is connected with a raw material benzene demand end. And a temperature detector IV is arranged on a shell side discharge part of the heat exchanger I. According to the device, fresh benzene is heated by utilizing process condensate fed water, so that the fresh benzene is separated from hot ethylbenzene produced in the ethylbenzene tower, and meanwhile, the heated fresh benzene heats the hot ethylbenzene, so that the heat lost by the hot ethylbenzene is compensated, and the resource waste is avoided; and the production cost of enterprises is reduced.

The application relates to an evaporation crystallization device and a wastewater treatment system. The evaporation crystallization device comprises an evaporation crystallization device and a wastewater treatment system; a crystallization separator is communicated with an evaporator and can perform gas-liquid separation on a gas-liquid mixture from the evaporator, so that solutes in a liquid phase are crystallized, and secondary steam is separated; a latent heat recovery device is communicated with the evaporator and the crystallization separator, can be communicated with raw material liquid, and can exchange heat between the secondary steam and the raw material liquid, so as to pre-heat the raw material liquid; the evaporator can heat the pre-heated raw material liquid to boiling by using live steam, so as to form a gas-liquid mixture. The evaporation crystallization device can exchange heat between the secondary steam generated by the crystallization separator and the raw material liquid by arranging the latent heat recovery device, the feeding temperature of the raw material liquid is improved, the live steam consumption of the raw material liquid in the evaporator can be reduced, and the waste of the latent heat of the secondary steam can be avoided; the secondary steam does not need more circulating water for cooling after heat exchange with the raw material liquid, and the energy consumption can be saved.

The invention relates to an energy-saving system in production of an aromatic hydrocarbon device, in particular to an energy-saving system, method and system for increasing the temperature of an extraction feeding unit of the aromatic hydrocarbon device. Comprising a xylene reformate tower system, an extractive distillation unit system, an extractive distillation raw material tank system and a direct supply process connected between an outlet of the xylene reformate tower system and an inlet of the extractive distillation unit system, materials are mixed in an extractive distillation raw material tank system through a direct supply process to be supplied to an extractive distillation unit system, so that the feeding temperature of the extractive distillation unit is properly increased on the premise of ensuring safety and stability, the steam consumption of a steam reboiler of an extractive distillation tower can be effectively saved, and the energy consumption cost is saved; the circulating water consumption of the C6-C7 water cooler is saved, the energy consumption cost is saved, and the electric quantity consumption of the extraction raw material pump motor is saved; the purpose of recycling heat to the maximum extent is achieved, and waste of steam energy is greatly reduced.

This invention discloses a system for extracting sodium chloride crystals from wastewater, comprising a raw material tank, a thin-film evaporator, a thickener, and a mother liquor tank. The raw material tank stores wastewater, and its outlet is connected to the inlet of the thin-film evaporator. The bottom outlet of the thin-film evaporator is connected to the inlet of the thickener. The upper overflow port of the thickener is connected to the inlet of the mother liquor tank, and the outlet of the mother liquor tank is connected to the thin-film evaporator. The bottom of the thickener has an outlet for material discharge. Wastewater enters the thickener from the raw material tank and the thin-film evaporator. The clear liquid from the thickener flows out from the upper overflow port and returns to the thin-film evaporator via the mother liquor tank. The system also includes a heat exchanger located between the raw material tank and the thin-film evaporator. The wastewater flowing from the raw material tank is heated by the heat exchanger before entering the thin-film evaporator. This invention provides a system for extracting sodium chloride crystals from wastewater, reducing system operating energy consumption and production costs.

The utility model relates to a chemical industry production heat recovery technology, and discloses a condensation water heat recovery system which comprises a steam condensation water collecting device, a heat exchanger, a raw material pump, an aromatic hydrocarbon device, a temperature sensor, a flow regulating valve and a control system. The steam condensation water collecting device is connected with the high-temperature fluid inlet through a high-temperature fluid inlet pipeline, the high-temperature fluid outlet is connected to the water return pipeline through a high-temperature fluid outlet pipeline, and the low-temperature fluid outlet is connected with the feeding pipeline through a low-temperature fluid outlet pipeline. The raw material pump is mounted on the feeding pipeline, the feeding pipeline is connected with a raw material storage tank, and the raw material pump is connected to the low-temperature fluid inlet through a low-temperature fluid inlet pipeline; the temperature sensors are respectively arranged at the low-temperature fluid inlet and the low-temperature fluid outlet; the flow regulating valve is installed on the high-temperature fluid inlet pipeline, and the high-temperature fluid inlet pipeline is further provided with a safety valve and a pressure sensor. And the control system is electrically connected with the temperature sensor, the flow regulating valve, the pressure sensor and the raw material pump.

The invention relates to a Hofmann degradation reaction system for continuous production of cyclopropylamine and a production method. The method comprises the following steps: pumping a cyclopropanecarboxamide aqueous solution (containing sodium chloride) produced in an amination reaction section and a sodium hydroxide / sodium hypochlorite mixed solution to respective heat exchangers, mixing through an efficient mixer I at a certain temperature, and then feeding into a substitution reactor; the mixed material enters a high-efficiency mixer II through an outlet of the substitution reactor, is mixed with a quantitative sodium hydroxide solution, then enters a Hofmann degradation reactor, and enters a reaction liquid receiving tank after the mixed material is completely reacted in the Hofmann degradation reactor; the reacted material is subjected to gas-liquid separation through a reaction liquid receiving tank and then enters a continuous rectification system to be rectified, and a cyclopropylamine product is obtained. According to the invention, the complete continuous production of the Hofmann degradation reaction of the cyclopropylamine can be realized, the production efficiency is high, the energy consumption is low, and the product quality is stable.