36results about How to "Stable operating temperature" patented technology

Novel reactor, systems and methods of preparing nanocrystals in a continuous flow-through process are provided. The novel reactor is highly configurable and can be modified to achieve desired reaction times of a flow through mixture. The reactor is designed to provide uniform, efficient heating of the reaction mixture.

The invention specifically discloses a system and method for high-efficiency extraction of vanadium from vanadium slag through chlorination, belonging to the fields of chemical engineering and metallurgy. By means of heat exchange between chlorination gas and chlorination flue gas, the chlorination gas is preheated; a proper amount of air is added to allow a part of coke powder to combust, thus providing a balanced supply of heat during the process of chlorination; by means of high-temperature fluidization oxidation of chlorinated slag, the chlorinated slag is treated in a comprehensive manner, and the chlorine gas is recycled; furthermore, by means of vapor-phase hydrolysis of the chlorination product vanadium oxytrichloride, a powdered vanadium pentoxide product and a hydrochloric acid byproduct are obtained; so the efficiency of chlorination is improved, the consumption of chlorine gas is reduced, the harm of the chlorinated slag is eliminated, and the problem of ammonia-nitrogen pollution caused by conventional ammonium salt precipitation is prevented. The system and method provided by the invention are applicable to extraction of vanadium from vanadium slag containing 10 to 28 wt% of V2O5 through chlorination and have the advantages of high efficiency, low energy consumption, no pollution, good economic performance, etc.

The invention provides a method for preparing fatty alcohol through fixed bed hydrogenation by using fatty acid methyl ester, which overcomes the defect that an adiabatic reactor cannot perform heat exchange, has no need of changing the prior device and process, and has the advantages of saving energy and improving the safety of a reaction device. The method comprises the following steps: adding methanol of which the purity is more than or equal to 99.8 weight percent into the fatty acid methyl ester of which the acid value (AV) is less than or equal to 0.8 percent of KOHmg/g, wherein the volume ratio of the fatty acid methyl ester to the methanol is 8-12:1; and using the methanol to release and absorb reaction heat in the process so that the temperature of a fixed bed catalytic hydrogenation reactor is kept relatively constant and side reactions are reduced. The reactants can be fatty acid methyl esters of C8-C18, such as methyl esterification products and the like of natural coconut oil, palm oil and palm nut oil. The fatty acid methyl ester can be obtained through the alcoholysis of the fatty acid and can also be obtained from markets, and the purity of the obtained fatty alcohol is more than 99.7 percent. The yield of the fatty acid methyl ester is more than 96 percent.

A Fischer-Tropsch synthetic reaction method is provided. After synthetic gas is dispersed into gas bubbles by a dispersing structure, the gas bubbles are fed into a mixer and fully mixed with a catalyzing solution containing a nanometer catalyst, and the fully mixed reaction stream enters a reaction micro-channel of a microreactor through a stream inlet and is subjected to a Fischer-Tropsch synthetic reaction to produce a hydrocarbon product. Heat generated by the reaction is released through heat exchange with a heat exchange medium in a heat exchange micro-channel, the reaction temperature in the micro-channel of the reactor is 100-250 DGE C, and the reaction pressure is 0.5-4.0 MPa. Materials discharged at a product outlet of the microreactor are synthetic gas, a gas-phase reaction product, a liquid phase containing the nanometer catalyst and a liquid phase reaction product, and are fed into a separator and subjected to gas liquid separation. A liquid phase discharged from a liquid phase hydrocarbon outlet of the separator is a hydrocarbon product. According to the method, the microreactor is adopted, and reaction devices are small in size and compact in structure and have characteristics of good mobility and low investment.

A process for preparing high-purity ethyl acetate features that the water, ethanol, acetic acid, ethyl acetate and the light component containing aldone and ester are proportionally loaded in the a purifying-refining tower from the chosen position and the operating reflux ratio is controlled to be (0.3-2.5):1.

The invention relates to a multistage suspension melting crystallization method for separating p-xylene. The multistage suspension melting crystallization method comprises the following steps: carrying out shunt operation on raw materials, carrying out multistage crystallization on a part of the raw materials, directly obtaining a p-xylene crystal, then using the rest of the raw materials to carry out pulping washing and warming aging on a low-temperature crystal in an aging kettle, and obtaining a p-xylene product. Stable operation of the aging kettle is guaranteed by adjusting the amount and temperature of the raw materials entering the aging kettle, and then the stability of product purity and yield is guaranteed. Through the technical scheme adopted in the invention, the problems of unstable operation of the aging kettle and high energy consumption existing in the prior art are preferably solved, and the method can be used in the crystallization production of the p-xylene.

The invention discloses a Fischer-Tropsch synthesis tail gas recycling system process. The process comprises the following steps that a Fischer-Tropsch synthesis tail gas is purified and then enters adeep cooling separation system, the purified Fischer-Tropsch synthesis tail gas is cooled and liquefied, and carbon II, carbon III and heavier components are recycled; methane in the tail gas is condensed and liquefied to prepare an LNG product; and hydrogen and carbon monoxide are purified through a PSA device. According to the Fischer-Tropsch synthesis oil tail gas deep-cooling recycling process, the components with high economic value such as ethylene, propylene and the like are recycled, the raw material gas such as the hydrogen and carbon monoxide of the Fischer-Tropsch synthesis reaction are recycled, and the methane in the tail gas is prepared into LNG or CN.

The invention relates to the field of waste gas treatment, and in particular relates to a method for purifying benzene containing waste gas and recycling benzene and a system using the method. The method comprises the following steps of: mixing waste mineral oil with water to obtain a mineral oil emulsion; washing and absorbing the benzene containing waste gas by using the mineral oil emulsion to discharge the up-to-standard waste gas and obtain the benzene absorbed mineral oil emulsion; and breaking the benzene absorbed mineral oil emulsion, and carrying out oil-water separation to obtain the benzene containing mineral oil. The system comprises an oil-water emulsifier unit, an emulsion storage tank, a washing absorbing tower, an emulsion breaking sediment filter device, and an oil-water separation device, wherein the oil-water emulsifier unit is connected with the emulsion storage tank, the emulsion storage tank is connected with the washing absorbing tower through a pump and is connected with the emulsion breaking sediment filter device through a valve, and the emulsion breaking sediment filter device is connected with the oil-water separation device. The method for purifying the benzene containing waste gas and recycling the benzene and the system by using the method provided by the invention treat wastes with processes of wastes against one another, turn waste into wealth, and are low in cost, high in efficiency, energy-saving, environment-friendly, and safe.

The invention provides a method for increasing the partial hydrogen pressure of a hydrogenation reaction system, and a design method and an application thereof, which are used for increasing the partial hydrogen pressure of the hydrogenation reaction system and belong to the fields of petroleum chemistry and coal chemistry. The hydrogenation reaction system comprises at least two reactors. The method comprises the following steps that materials discharged from the former-stage reactor firstly enter a separating system for increasing the partial hydrogen pressure to conduct separation, then non-hydrogen components obtained are separated and discharged, and hydrogen components and liquid-solid phases enter the next-stage reactor. The materials from an outlet of the former-stage reactor are effectively separated by the separating system, the liquid-solid phase enters the next-stage reactor, and the gas phase is separated again, so that after the concentration of the hydrogen in the gas phase is increased, and the hydrogen enters the next-stage reactor. The method provided by the invention has the advantages that the partial hydrogen pressure of the next-stage reactor can be increased, the reaction depth can be effectively increased, the material conversion ratio and the light-oil yield can be increased, the space speed of the next-stage reactor also can be increased and the energy consumption can be reduced.

The invention provides a fuel cell stack operation temperature control method, device and system. The method comprises the steps of receiving a first temperature regulation and control instruction of a user in a stack temperature change regulation and control process, according to the first temperature regulation and control instruction, executing a temperature regulation step corresponding to the theoretical temperature value feedback mode, acquiring a second actually measured temperature value of the stack cooling liquid inlet, calculating a theoretical temperature value of a stack cooling liquid outlet according to the second actually measured temperature value of the stack cooling liquid inlet, adjusting the operating temperature of the fuel cell stack based on the theoretical temperature value, circularly executing the temperature adjusting step until the operating temperature of the fuel cell stack is stabilized at the target temperature value, and receiving a second temperature regulation and control instruction of the user, and adjusting the operating temperature of the fuel cell stack based on an operating temperature feedback mode in the second temperature regulation and control instruction. The regulation efficiency of the operating temperature of the fuel cell stack can be improved, the accuracy of temperature control is improved, and fluctuation is eliminated.

The invention discloses an improved device of a low-pressure system of a carbon dioxide air stripping urea device. The device comprises a low-pressure methylamine condenser, a liquid level tank, a first pump group, a first circulating cooler, a first circulated cooling water inlet pipe and a first circulated cooling water outlet pipe, wherein any section of the first circulated cooling water inlet pipe or the first circulated cooling water outlet pipe is communicated with a water supply tank. In the invention, the water supply tank is additionally arranged to continuously supply water to the system so as to balance the working pressure of low-pressure circulating water; and after the improved device is used, the pressure and the temperature of the system do not greatly fluctuate any more, and the circulating water system cannot be short of water, thereby the operation pressure and the operation temperature of the system are stabilized. A washing section is additionally arranged between the liquid level tank and a subsequent section device, thus system carries less liquid, absorbs less pressure and recovers more energy, the consumption is lowered and the output is increased.

The invention relates to a pressurized hot water sterilization process and equipment pipeline configuration of a continuous sterilization system for aerobic microbe fermentation culture mediums or fed-batch materials. The process comprises the following steps that: 1) a pressurized water sterilization tank is fully filled with water, g air in the tank is exhausted, water in the tank is connected with a heat exchanger A through a continuous sterilization pump and the water is heated; 2) hot water returns back to the pressurized water sterilization tank along a culture medium or fed-batch material inlet pipeline through a maintaining tank before the hot water enters a fermentation tank or a fed-batch tank, and after the designated liquid level is reached, inlet water and outlet water enter a closed circulation mode, the water is continuously and cyclically heated, the temperature of the water in the tank is continuously increased and non-condensable gas is continuously exhausted; and 3) when the temperature of the water reaches 100 DEG C, an exhaust valve is closed and corresponding internal pressure of the water sterilization tank is increased with the increase of the temperature of the water, and when the temperature of the water reaches 125-130 DEG C, the inlet water and the outlet water of the system enter a pressurized closed circulation mode and then water sterilization of the system is conducted immediately. The pressurized hot water sterilization process and the equipment pipeline configuration of the continuous sterilization system for aerobic microbe fermentation culture mediums or fed-batch materials have the advantages that the pressurized sterilizing water production process is stable, continuous and reliable, the safety of the continuous sterilization system for culture mediums or fed-batch materials in the fermentation engineering is improved, the heat loss of the pressurized sterilizing water is fewer and the energy consumption is reduced.

The invention relates to buried sewage treatment equipment. The buried sewage treatment equipment comprises a capsule-shaped tank body, a water inlet pipe positioned at one end of the tank body, and a repair pipe positioned in the middle position of the top of the tank body, wherein an insulation board having the same shape as the tank body is arranged on the inner side of the tank body; an electric heating net is arranged on the inner side of the insulation board; a first drainage pipe is mounted on one side of the top of the tank body. The buried sewage treatment equipment can be heated according to the ambient temperature inside the equipment so as to ensure that the running temperature of inner components inside the equipment is stable; moreover, the buried sewage treatment equipment can be effectively and thermally insulated to reduce the influence of the ambient temperature on the sewage treatment efficiency so as to improve the sewage treatment efficiency of the equipment and improve the environmental adaptability of the equipment; furthermore, odor generated in the sewage treatment process can be effectively treated so as to reduce the influence on a surrounding environment; in addition, through an own power supply, energy is saved and the using cost of the equipment is reduced.

The invention discloses a heat recovery method of washing tower process water, which comprises the following steps: a liquid level of a heat-removed water buffer tank is established through desalted water F, the desalted water F is used as a source of heat-removed water, and heat-removed water G flows out of the bottom of the heat-removed water buffer tank to a heat-removed water circulating pump;and an inlet of the heat-removed water circulating pump receives heat-removed water G from the heat-removed water buffer tank, heat-removed water H is obtained after pressurization, and the heat-removed water H is sent to a shell pass inlet of a washing water cooler to serve as a cold source of the washing water cooler. On the premise of not increasing the consumption of circulating water and steam, the heat balance problem of the system is solved, the operating temperature of the washing tower is stabilized, scaling is avoided, the heat exchange efficiency of a heat exchanger is guaranteed,the overhaul frequency of the heat exchanger is reduced, and the yield of the device is increased.

The invention relates to an intelligent manufacturing special network data acquisition and temperature control system comprising an intelligent feedback adjustment terminal, a control system, an automatic ignition unit, a blowing unit, a flame monitoring unit, an automatic temperature control unit, a gas heating unit and an electric heating unit, wherein the flame monitoring unit collects the heating temperature of a burner of the gas heating unit; the automatic temperature control unit collects the temperature data of the flame monitoring unit and the temperature data of the electric heatingunit, and uploads the collected temperature data to the control system; the intelligent feedback adjustment terminal receives the temperature data uploaded by the control system; when the temperatureis lower than the initial forging temperature of the workpiece, the gas heating unit is driven by the automatic ignition unit to continue heating; and when the temperature is higher than the heating processing temperature of the workpiece, the blowing unit performs the blowing and cooling. The system provided by the invention realizes the automatic start and stop of the heating furnace, the automatic adjustment of the flame and the automatic shutdown when flameout according to the change of the temperature.

The invention relates to the technical field of arrangement systems and methods for transformer substation secondary equipment, in particular to a pipeline-type transformer substation secondary equipment underground arrangement system and method. Secondary equipment pipelines are arranged on the lower part of transformer substation primary equipment; pipeline inlets in the tops of the secondary equipment pipelines are connected with pipeline inlet enclosing devices; extraction guide rails and wiring sleeves are arranged in the secondary equipment pipelines; secondary connecting lines are arranged in the wiring sleeves; transformer substation secondary equipment is connected to the extraction guide rails; the transformer substation primary equipment is connected with the transformer substation secondary equipment through the secondary connecting lines; and monitoring sensors and environment monitoring and ventilating devices are further arranged in the secondary equipment pipelines. A stable running temperature is provided for the transformer substation secondary equipment through an underground constant-temperature environment, and the temperature control effect is not influenced by the reliability of a heating device and the environmental change of a transformer substation. A communicated running space is adopted, so that the heat exchange effect is uniform, and the system has high running stability and high adaptability in different climatic environments and is suitable for in-place arrangement of the transformer substation secondary equipment.