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1387results about How to "Avoid overheating" patented technology

Method for undergoing chlorobenzene nitration reaction by using micro-channel reactor

The invention relates to a method for undergoing a chlorobenzene nitration reaction by using a micro-channel reactor, belonging to the technical field of application of organic synthesis. In the method, nitric acid, sulfuric acid, water and chlorobenzene are taken as initial reaction raw materials, and processes such as mixed acid preparation, mixed acid and chlorobenzene preheating, mixed acid and chlorobenzene reacting and the like are completed in a micro-channel reactor system. In the reaction, nitro-sulfuric mixed acid is taken as a nitrating agent, the effective concentration of sulfuric acid in the mixed acid is 50-90 percent, the molar ratio of the nitric acid to the sulfuric acid in the mixed acid is 1:1-1:10, the molar ratio of the chlorobenzene to the nitric acid is 1:1.0-1:2.0, the reaction temperature is 50-100 DEG C, and the reaction time is 30-120 seconds. The chlorobenzene transformation ratio is up to 97 percent, the selectivity of nitrochlorobenzene serving as a product is over 96.5 percent, and the ratio of ortho-para nitrochlorobenzene is over 0.6. A strengthened mixed micro-channel reactor adopted in the invention is particularly suitable for undergoing a continuous nitration reaction, and has the characteristics of stable temperature control and safe process.
Owner:CHANGZHOU UNIV

Automatic boiler combustion control system of circulating fluid bed

The invention discloses an automatic boiler combustion control system of a circulating fluid bed, which is applied to machine sets for coal-fired power generation, heat supply or combined heat and power generation. The system comprises hardware and control program software, wherein the control program software comprises a fuel control part, an air volume control part and a deslagging control part, and the control program software can automatically and timely control the input quantity of boiler fuel, the oxygen content in the boiler and the boiler deslagging device. The combustion control system is applicable to all sorts of complicated operating conditions, has consistently correct and reliable reaction, advanced and reasonable algorithm design as well as good control effect, is safe and effective, has the capabilities of improving boiler combustion condition, increasing boiler combustion efficiency and reducing unburned carbon in flue dust, leads main steam pressure control to be stable, enhances the capability of tracking the change in load of the boiler and greatly improves the running safety performance, leads main steam temperature control precision to be effectively improved, avoids temperature excursion of an overheater, reduces the danger of steam turbine water slug caused by low-temperature steam, and improves the thermal efficiency and automation control degree of the steam turbine.
Owner:DONGGUAN TEXWINCA HLDG

Material increase manufacturing method for titanium alloy shape part by using double-arc hybrid heat source

The invention relates to a material increase manufacturing method for a titanium alloy shape part by using a double-arc hybrid heat source. The method comprises the following steps: MIG welding and TIG welding are originally combed, a welding wire as a melting electrode is sent out by an MIG welding gun and is subjected to surfacing on a base plate; an MIG power anode is connected with a TIG power anode, and an MIG power cathode is connected with the base plate, the MIG welding gun is connected with the MIG power anode, and a TIG welding gun is connected with a TIG power cathode; the MIG welding gun is in the front, and the TIG welding gun is in the back; the current of the welding wire is shunted through a TIG welding circuit, so that the current passing through the welding wire is large, and the current passing through a weldment is small. After the base plate completes a first surfacing layer, a hybrid welding gun is increased by a story height, and a second layer of shape part is welded; the above process is repeated, so that the titanium alloy shape part is formed by overlaying plurality of surfacing layer. The method has the advantages of being high in metal deposition rate, high in welding speed, less in weldment heat input, good in structural and mechanical properties of the shape part and low in cost and solves the problems of lager heat input, low welding speed, poor welding quality and low efficiency during material increase manufacturing of the traditional titanium alloy single TIG arc wire feeding.
Owner:JIANGSU UNIV OF SCI & TECH

Refrigeration control system and method for data center

The invention provides a refrigeration control system and method for a data center. The system comprises a plurality of servers, a plurality of first temperature sensors, a controller and an air conditioner, wherein the plurality of first temperature sensors are mounted at air inlets of the plurality of servers and used for detecting air inlet temperatures of the plurality of servers in real time; the controller is used for receiving the detection temperatures sent by the plurality of first temperature sensors, calculating an average temperature in a data center according to the detection temperatures, and generating a control command according to the average temperature in the data center; and the air conditioner is sued for receiving the control command sent by the controller, and adjusting the working mode according to the control command. According to the system provided by the embodiment of the invention, on the premise that the cooling requirement safety of the servers is met, excessive refrigeration caused by an excessively cautious refrigeration control strategy as well as overheating of local servers caused by an excessively radical refrigeration control strategy can be avoided, and the refrigeration energy consumption and service failure rate are reduced greatly.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD

Aerial fog generating device and use method thereof

The invention provides an aerial fog generating device and a use method thereof. The aerial fog generating device comprises a cavity, a sealing cap, an air diversion device and a heater, wherein the cavity is provided with a cavity shell and a cavity accommodating space formed by the cavity shell, the cavity accommodating space is used for accommodating a medium to be heated, and the top of the cavity is provided with filter cotton; the sealing cap is arranged at the bottom of the cavity to seal the bottom of the cavity, and the bottom of the sealing cap forms a penetrating part; the air diversion device is arranged below the sealing cap, and is provided with a diversion trench and a diversion hole, and the diversion hole is arranged corresponding to the penetrating part; the heater comprises a heater bottom cover and a heating ceramic piece, the heater bottom cover is arranged below the air diversion device, and the heating ceramic piece is fixed on the heater bottom cover, passes through the diversion hole and penetrates through the penetrating part so as to be arranged in the cavity accommodating space in a penetrating manner. According to the aerial fog generating device provided by the invention, the heating is uniform, the efficiency is high, the phenomenon that the temperature of the heating ceramic piece is too high can be avoided, and an airflow guiding device adopted can also increase the quantity of aerial fog generated.
Owner:SHANGHAI TOBACCO GRP CO LTD

Calcination process of active lime

The invention discloses a calcination process of active lime. The calcination process adopts a preheating-suspension calcination device comprising a multi-stage cyclone preheating system, a decomposing furnace and a multi-stage cyclone cooler. The calcination process is characterized in that limestone powder which is broken and homogenized into blocks is ground into fine powder, the fine powder is placed in a storage tank for homogenization, then preheated by the multi-stage cyclone preheating system and sent to the decomposing furnace for calcination, thereby preparing the active lime, and the active lime is further cooled by the multi-stage cyclone cooler for obtaining the active lime; wherein the main control temperature of the decomposing furnace is 850-950 DEG C; and the calcination time is 3-5 seconds. The calcination process utilizes the preheating-suspension calcination reaction method for calcining the active lime, and fuel can use low-grade fuel-biluminous coal. Compared with the traditional process, the calcination time is short, the effective utilization rate of the lime product is high, the product quality is stable, the energy consumption is low, and a production region has no environmental pollution; meanwhile, the calcined active lime is the fine powder, the use is very convenient, and the range of applications is broader in comparison with the active lime calcined by the traditional process, thereby being conductive to promotion and implementation.
Owner:BEIJING LIULIHE CEMENT

Laser Ultrasonic Determination Method of Metal Third-Order Elastic Constant

The invention discloses a method for utilizing a laser ultrasonic wave to precisely measure a third order elastic constant of metal. The method comprises the following steps: respectively measuring wave velocities of a longitudinal wave, a transverse wave and a surface wave excited by a laser under stress-free state and stress state; utilizing the wave velocities of the longitudinal wave, the transverse wave and the surface wave measured under stress-free state to calculate a second order elastic constant and a density of metal according to a sonic elasticity theory and a Rayleigh equation; utilizing the ultrasonic wave velocities of the longitudinal wave, the transverse wave and the surface wave measured under stress state to introduce an equivalent second order elastic constant and an independently measured linear coefficient of thermal expansion; and lastly, calculating the third order elastic constant according to the sonic elasticity theory. According to the method, a pulse laser source is utilized to excite a sound surface wave, non-contact exciting is performed under a thermal elastic system and an overheated phenomenon of materials is avoided, so as to realize nondestructive measurement. A large amount of sound surface wave data spread for different distances is collected and a correlation function is utilized to calculate a wave velocity of the sound surface wave and a spread distance of sound wave, thereby greatly reducing error of arriving time value of the sound surface wave and promoting the measuring precision of a sound wave velocity.
Owner:NANJING UNIV OF SCI & TECH

Method for continuously synthesizing arylboronic acid ester by utilizing microreactor

The invention relates to a method for continuously synthesizing arylboronic acid ester by utilizing a microreactor, which belongs to the technical field of green organic synthesis application. The method comprises the following steps of: preheating substituted arylamine, tert-butyl nitrite, bisdiborane in a continuous-flow micro-channel reactor system by using substituted arylamine, acetonitrile, tert-butyl nitrite and bisdiborane as starting materials; and mixing the substituted arylamine with the bisdiborane and then reacting the obtained mixture with the tert-butyl nitrite, wherein in the reaction, the molar ratio of the substituted arylamine to the bisdiborane is (1:0.5)-(1:1.25), the molar ratio of the substituted arylamine to isoamyl nitrite is (1:1.1)-(1:1.5), the reaction temperature is 60 DEG C-120 DEG C, the reaction time is 50 seconds-3600 seconds, and the effective conversion ratio of the substituted arylamine is 50%-90%. The continuous-flow microreactor, which is capable of strengthening the mixing effect, the mass transfer effect and the heat transfer effect, is especially suitable for carrying out homogeneous reaction of the method. Moreover, the method has the characteristics of stable temperature control, safe process and less waste material.
Owner:JINAN SHAOYUAN MEDICAL TECH

Cooling system of cabinet

A cooling system of a cabinet comprises an outer circulating system and an inner circulating system. The outer circulating system comprises a cold source, a liquid storage tank and an outer circulating pump, and a working medium inlet pipe and a working medium outlet pipe of the outer circulating system are connected with a middle heat exchanger. The inner circulating system comprises a cabinet inner circulating sub-system, a working medium inlet pipe of the inner circulating system and a working medium outlet pipe of the inner circulating system. The cabinet inner circulating sub-system comprises liquid-cooling radiators, a cabinet inner work medium inlet connected with the working medium inlet pipe of the inner circulating system through an inlet check valve, a cabinet inner working medium return pipe connected with a working medium return pipe of the inner circulating system through an outlet check valve, and an air-cooling radiator. The air-cooling radiator is connected with the cabinet inner working medium inlet pipe and the cabinet inner working medium return pipe, a flow proportion adjusting valve is arranged between the air-cooling radiator and the cabinet inner working medium inlet pipe, the liquid-cooling radiators are connected with the cabinet inner working medium inlet pipe and the cabinet inner working medium return pipe, and a flow proportion adjusting valve is arranged between each liquid-cooling radiator and the cabinet inner working medium inlet pipe. The cooling system has the advantages of being high in cooling efficiency and capable of saving energy.
Owner:SHENZHEN ENVICOOL TECH

Processing method of fine-grain superplastic TA15 titanium alloy medium-thickness plate

The invention discloses a processing method of a fine-grain superplastic TA15 titanium alloy medium-thickness plate. The processing method comprises the following steps that 1, vacuum consumable arc melting is carried out to obtain a TA15 titanium alloy cast ingot; 2, after heat preservation, a primary forging stock is obtained through upsetting, drawing, cogging and forging; 3, after heat preservation, a second-stage forging stock is obtained through beta-phase region upsetting and drawing forging; 4, upsetting and drawing forging in an alpha + beta two-phase region is carried out to obtain afourth-stage forging stock; 5, a forge piece is obtained through upsetting, drawing and finish forging; 6, after heat preservation, a first-fire rolled plate blank is obtained through first-fire rolling; 7, after heat preservation, a second-fire rolled plate blank is obtained through second-fire rolling; and 8, the TA15 titanium alloy medium-thickness plate is obtained through annealing treatment. According to the processing method of the fine-grain superplastic TA15 titanium alloy medium-thickness plate, the corresponding deformation temperature is selected and combined with multi-heating-number large-deformation upsetting and drawing forging, so that the TA15 titanium alloy cast ingot with a coarse structure is crushed under the large deformation, driving force is provided for recrystallization, the grain refinement and homogenization degree is improved, and the fine-grain superplasticity TA15 titanium alloy medium-thickness plate is obtained.
Owner:NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH

Control method for delay coking stove

The invention discloses a control method for a delayed coking furnace, comprising: measuring a steam injection quantity, a feeding quantity and a feeding pressure; judging whether the injection quantity has sudden increase abnormal working condition, according to the measured steam injection quantity, feeding quantity and feeding pressure; measuring the temperatures of a hearth and a tube wall, if the sudden increase abnormal working condition occurs; determining an objective fuel quantity, according to the hearth temperature, the feeding quantity and the tube wall temperature; and adjusting the fuel quantity of the delayed coking furnace to the objective fuel quantity. By a state feedback prediction control scheme of real states, the anti-interference ability is effectively improved. Directed at the process characteristic change caused by load change and coking, the variation of a working point is judged on line, model self-adaptation is carried out, and the rate of putting into operation is increased. Directed at great inverse response of an outlet temperature caused by sudden increase of steam injection quantity, expert control is performed based on heat balance calculation, which can effectively prevent the outlet temperature from exceeding, and improving the operation cycle of devices.
Owner:TSINGHUA UNIV

Operation-starting method of sulfurized hydrogenation catalyst

The invention relates to an operation-starting method of a sulfurized hydrogenation catalyst. The method comprises the following steps: putting the sulfurized hydrogenation catalyst into a reactor; then pumping inert gases to replace the air in the reactor and pipes in front of and at the back of the reactor and gradually raising the temperature to the activation temperature; and pumping hydrogen to replace the inert gases, adjusting the pressure and temperature to the reaction pressure and temperature after the airflow is stable and putting raw oil to begin hydrogenation. The method overcomes the defects of high preparation cost, long presulfurization time and high operation cost of the conventional oxidized catalysts. The method has the following advantages: the catalyst prepared by the method dispenses with presulfurization and has simple preparation process and operation-starting method; concentrated heat release during operation starting can be suppressed by adopting the inert gases to activate the catalyst; the method is suitable for preparing catalysts for hydrogenation of petroleum fractions; and the hydrogenation activity of the catalyst prepared by the method is superior to that of the conventional catalysts.
Owner:CHINA PETROLEUM & CHEM CORP +1

Microwave induction control method and microwave induction control device

ActiveCN104678828AExtended service lifeSolve problems that are prone to electric shock hazardsProgramme controlComputer controlHuman bodyElectricity
The invention discloses a microwave induction control method and a microwave induction control device and relates to the technical field of application of microwave sensors. According to the method, an action system for judging whether persons enter or leave the scene or not is established by using the Doppler effect through the microwave induction control device; a switch of a power supply of an electrical appliance is controlled by identifying the action that human bodies enter or leave the scene; the microwave induction control device adopted by the method can be arranged inside the electrical appliance, so that the electrical appliance adopts a closed structure, and moisture resistance and electric shock prevention can be realized. In addition, according to the method, the action whether the human bodies leave or not can be identified, and the power supply of the electrical appliance is automatically closed when the human bodies leave the detection range and no person exist in the detection range. Besides, the device is low in power consumption; when the device is installed on the electrical appliance for use, the standby power consumption of the electrical appliance can be greatly reduced, and further the aims of saving energy and electricity are achieved.
Owner:感仁科技(深圳)有限公司

Monolithic multi-way valve body casting piece casting method

ActiveCN105903910ADefect control such as sticky sandAvoid overheatingFoundry mouldsFoundry coresCasting defectLinearity
The invention discloses a monolithic multi-way valve body casting piece casting method which comprises the following steps: preparing a core preparing mold, and checking and cleaning the mold; preparing a main core by mold sand, and after the shape of the main core is finalized, spraying a mold release agent, and demolding; preparing small cores, and drilling exhaust holes in the small cores; finishing to remove burrs on the main core and the small cores, and removing a transition jet nozzle on the main core; fixing the main core by a sand core bonding preparation tooling, firstly assembling the small core at one side, and then assembling the small core at the other side; mounting the assembled sand core into a shell body; and casting a valve body: performing a pouring process at two sides of a side thin gate at the same time, using an exothermic riser with the diameter of 120 mm and the height of 220 mm, and placing special cold iron at the bottom face of the shell body. The monolithic multi-way valve body casting piece casted by the casting method has the advantages that the linearity of a main valve hole casting blank is controlled to be less than or equal to 1.0 mm, and the valve hole linearity is ensured; the casting piece pore shrinkage, shrinkage porosity, internal gas holes and other casting defects, especially defects of micropores in the casting piece, are solved; and the compactness of the internal structure is improved.
Owner:南通华东油压科技有限公司

Operation method of vulcanized catalyst

The invention relates to an operation method of a vulcanized catalyst, which comprises steps of loading the vulcanized catalyst into a reactor, introducing inert gas to replace air in the reactor and air in pipes in front of and behind the reactor, gradually raising the temperature to the activation temperature, switching hydrogen, adjusting pressure and temperature to reaction pressure and reaction temperature after airflow is stable, and introducing raw oil to carry out hydrogenation reaction, wherein a sulfide precursor containing metal Mo or W, Ni or Co, and a catalyst carrier required by the dipping of the dipping solution of an organic assistant are adopted by the vulcanized catalyst, and can be dried to obtain the vulcanized catalyst. The operation method solves the disadvantages of high preparation cost, long prevulcanization time and high operating cost of the traditional oxidation state catalyst. The catalyst prepared by the method does not need to be pre-vulcanized, and the preparation process and the operation method are simple, and are suitable for preparing the petroleum distillate hydrogenation catalyst. The hydrogenation activity of the catalyst prepared by the operation method is better than that of the traditional catalyst.
Owner:CHINA PETROLEUM & CHEM CORP +1
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