343results about How to "Stable temperature control" patented technology

A critical water-controlled type semiautomatic electric heating cooking pot consists of a wireless coupling electric heating cooking pot body and a power coupling seat, wherein an electric heating plate and a heat-conduction connecting plate are arranged on a semi-spherical surface of a non-stick pot bottom; the heat-conduction connecting plate penetrates in a strip-shaped channel in the middle of the electric heating plate and is provided with a temperature sensor; a circular base is arranged on the heat-conduction connecting plate; a rectangular coupling socket is formed in the middle of the circular base; the left end and the right end of the coupling socket are provided with a connecting plate groove and a front and back blade groove; the heat-conduction connecting plate in the connecting plate groove and a front and back electric contact blade in the front and back blade groove are respectively in contact with an earthing spring plate and a front and back power spring plate on a coupling plug of the power coupling seat, so that power wires of the heat-conduction connecting plate and the front and back electric contact blade are in coupling connection with the coupling plug of the power coupling seat; a triangular machine box is arranged on the left side of a control handle; and an operating panel is arranged at the left upper end of the triangular machine box and is respectively provided with a high-temperature button, a high-temperature indicator lamp, a low-temperature button and a low-temperature indicator lamp. The temperatures of different regions of the surface in the pot are correspondingly changed along with change of the quantity of water in the electric heating cooking pot, and are measured and controlled according to change of a critical temperature, the electric heating cooking pot can be switched off automatically during cooking, the circumstance that a user forgets to switch off the cooking pot and food in the cooking pot is burned are avoided, the time is saved, the user does not need to worry about the food in the cooking pot, and troublesome problems are avoided.

The invention relates to a processing flow of FT synthetic oil, which comprises hydrogenation, low-temperature oil washing, decarburization and PSA. The invention is characterized in that the synthetic oil is mixed with hydrogen via a filter, and enters a hydrogenated prerefining reactor after heat exchange, then enters a hydrogenated refining reactor after the synthetic oil is heated to 300 to 380 DEG C by a heating furnace; oxygen-containing compounds, unsaturated hydrocarbons and metal impurities in the raw material are extracted; the hydrogenated refined product enters a high thermal separator for separation of oil phase and gas phase after heat exchange, and enters a hydrocracking reactor for hydrocracking after heat exchange and heating of the heating furnace; the cracked product and the refined product are mixed to enter a fractionation system; a combined flow with two stages connected in series is adopted for the hydrogenated refining reactor and the hydrocracking reactor which share a recycle hydrogen system; a fractionation system is shared by the hydrogenated refined oil and the hydrocracked oil; and a three-column process flow is adopted for the fractionation system. The invention has the advantages of low gas consumption of the low-temperature oil washing process, high recovery of light hydrocarbons, less matching investment, and reduction of energy consumption and improvement of hydrogen recovery rate due to the decarburization process.

A temperature control system includes a first temperature adjustment unit storing fluid at a first temperature; a second temperature adjustment unit storing fluid at a second temperature higher than the first temperature; a low-temperature flow path for passing fluid supplied from the first temperature adjustment unit; a high-temperature flow path for passing fluid supplied from the second temperature adjustment unit; a bypass flow path for circulating fluid; a combination flow path for passing fluid from the low-temperature flow path, the high-temperature flow path, and the bypass flow path merged at a merging part; a temperature adjustment part that passes fluid from the combination flow path and cools/heats a member of a semiconductor manufacturing device; and a control device that controls valve positions of variable valves attached to the three flow paths upstream of the merging part and adjusts the flow rate distribution ratio for the three flow paths.

The invention proposes a heating control method of an electromagnetic heating apparatus. The method comprises the steps of detecting a current temperature of the electromagnetic heating apparatus; and performing output power limitation and intermittent heating adjustment on the electromagnetic heating apparatus according to the detected current temperature for enabling the electromagnetic heating apparatus to keep a predetermined temperature interval. By use of the heating control method, the electromagnetic heating apparatus can be subjected to multilevel control, so that the bottom of a pan is slowly heated or cooled during cooking and can be further kept in a specific temperature range, and various cooking demands are better met.

The invention provides a performance tester of a continuous flat ultrafiltration membrane and a reverse osmosis membrane and a use method thereof. The tester comprises a water supply unit, a drainage unit and a plurality of parallel infiltration ponds, wherein each infiltration pond comprises a substrate, a shell, a water inlet, a water outlet, an exhaust port, a bottom inserting tube, a stirrer and a constant-temperature water bath jacket. Produced water penetrating through a separation membrane to be measured is discharged out of the infiltration ponds via the water outlets. The tester can carry out constant-temperature and stable operation at higher temperature and can realize the functions of testing membrane separation performance and membrane flux attenuation, extracting key pollutants of the membrane, cleaning the membrane on line and testing membrane performance restore after cleaning.

The invention discloses a method for producing grafted starch size through bio-enzyme. The method adopts ultronic assistant debranching enzyme to pretreat original starch, the macromolecular structure and molecular weight of the starch are adjusted, and the masses of different types of enzymes are stabilized; and a mixed initiating system which consists of horse radish peroxidase, hydrogen peroxide and beta-diketone is utilized to initiate the graft copolymerization of the starch and acrylic acid monomers, and a polyacrylic acid branch is connected to a starch macromolecule. According to the method, the bio-enzyme is adopted to modify the starch, the reaction conditions are moderate, and the activity is controllable; the horse radish peroxidase initiates the polymerization reaction, so that low-temperature branching polymerization can be effectively realized, and the temperature of an initiation process is controlled stably; and the polymerization product has low viscosity and is easy to separate.

The invention discloses an intelligent temperature control acupuncture therapeutic apparatus. The intelligent temperature control acupuncture therapeutic apparatus comprises a power module, a liquid touch screen, a touch-screen controller, an electronic temperature control component used for simulating moxibustion temperature curve and a heating head used for being inserted into the handle portion of an acupuncture pin to conduct heating, wherein the electronic temperature control component is composed of a system control module and a heating driving module, the system control module is connected with the heating driving module in a communication mode, the system control module is connected with the power module and the touch-screen controller in a communication mode, the liquid touch screen is connected with the touch-screen controller in a communication mode and used for setting the heating time and the temperature cycle period of the heating head and displaying the temperature change and the heating time of the heating head in work, the heating head is connected with the heating driving module through a guide line, and the system control module and the heating driving module control the temperature change range of the heating head from 30 DEG C to 59 DEG C. According to the intelligent temperature control acupuncture therapeutic apparatus, moxibustion technique change and moxa-cone temperature change are effectively simulated, a continuous and variational thermal stimulus state is kept, fast - slow adaptation phenomenon caused when a human body experiences the apparatus is avoided, and clinical effect is improved.

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 relates to the preparation technology for a large size super-high obdurability magnesium alloy thin plate. The preparation technology particularly comprises the following steps that firstly, a magnesium alloy blank is heated to 250-450 DEG C and subjected to heat preservation for 1-3 h; then, the magnesium alloy blank is subjected to equal-channel angular pressing, after being extruded for one to two passes, the magnesium alloy blank is remelted and annealed, pressing is conducted for 8-12 times, and then a magnesium alloy rod material is obtained; before a rolling mill conducts rolling, a roller is preheated, the preheating temperature is 150-450 DEG C, and the roller is subjected to heat preservation treatment in the rolling process; after the obtained magnesium alloy rod material is subjected to heat preservation for 20-60 min at the temperature of 250-450 DEG C, the magnesium alloy rod material is rolled by adopting a multi-pass and small-deformation method, and the speed of the roller is 0.2-0.5 m/s; after every pass of rolling, remelting and annealing are conducted, horizontal rolling and vertical rolling are alternately conducted in the rolling process, and a magnesium alloy thin plate is obtained; and the obtained magnesium alloy thin plate is subjected to aging treatment, and then a finished magnesium alloy thin plate is obtained. According to the preparation technology of the large size super-high obdurability magnesium alloy thin plate, the prepared magnesium alloy thin plate is uniform in crystalline grain and excellent in mechanical property.

The invention discloses a temperature control method based on a phase-transition energy-accumulation material. In the method, the phase-transition energy-accumulation material is selected according to a required control temperature, so that the phase-transition temperature of the phase-transition energy-accumulation material can be a set control temperature of a device; in a product processing process, the selected phase-transition energy-accumulation material in a solid-liquid mixed state is introduced into an energy-accumulation material channel, a temperature-control area is close to the phase-transition energy-accumulation material channel, and a constant-temperature temperature-control medium is provided by utilizing the energy-accumulation property of the phase-transition energy-accumulation material. By adopting the temperature control method based on the phase-transition energy-accumulation material, the temperature around a cavity is stably controlled under the phase-transition temperature of the selected material, the phase-transition material is molten from the solid state to the liquid state at a fixed temperature after absorbing heat so as to form a heat-absorption mechanism, and large heat absorption amount ensures that the temperature around the cavity is relatively balanced; after being properly cooled, the phase-transition material is solidified from the liquid state to the solid state so as to form a heat release mechanism at the fixed temperature, so that the temperature around the cavity is relatively balanced and continuously recycled.

The invention relates to a coal tar alkali-free normal/reduced-pressure distillation process and a coal tar alkali-free normal/reduced-pressure distillation device. In the process, raw material coal tar is subjected to heat exchange and delivered into a dehydrating tower, and light oil distillate and water are collected from the top of the dehydrating tower; the coal tar at the bottom of the dehydrating tower is subjected to heat exchange and delivered to a main tower, and a carbolic oil distillate is collected from the top of the main tower; a mixed oil distillate is collected from a lateralline; carbon black oil or soft asphalt is collected from the bottom of the tower; bottom material of the main tower is pumped out; part of soft asphalt is pumped out from the bottom of the main towerand delivered to an asphalt tower for distillation under a negative pressure, a heavy oil distillate is collected from a lateral line of the tower, and asphalt is produced at the bottom of the tower;and the main tower is a normal-pressure low-temperature distillate tower, the asphalt tower is a low-temperature reduced-pressure asphalt tower, and all distillates are not added with alkali in the whole flow. In the device, the bottom of the dehydrating tower is connected with the middle of the main tower through a pipe, and the bottom of the main tower is connected with the middle of the asphalt tower through a pipe. The internal circulation at bottom of the main tower is realized through a heating furnace, and internal circulation at the bottom of the asphalt tower is realized through a heating furnace. The process and the device have the advantages that: all distillates are not added with alkali; distillates are cut according to market demands and temperature gradient; direct super-heated steam is not used; new process waste water is avoided; the energy consumption is low; the product quality is high; and the like.

The invention discloses a hydrogenation device and hydrogenation method for polymer continuous hydrogenation. The method comprises the following steps: in the presence of a hydrogenation catalyst, carrying out catalytic hydrogenation on a polymer colloidal liquid containing olefin unsaturated bond and hydrogen, wherein the used hydrogenation kettle contains a high-efficiency jet reactor; and sending the colloidal liquid part after hydrogenation into the subsequent unit, and circulating the rest colloidal liquid by a circulating liquid heat exchanger. The method avoids the side reaction of hydrogenating the benzene ring in the reaction kettle by the hydrogenation polymer, and one device can adapt to hydrogenation reaction of multiple polymers, thereby lowering the catalyst consumption, enhancing the yield of the colloidal liquid with satisfactory hydrogenation degree, and reducing the waste of the polymerization colloidal liquid in the hydrogenation process. The polymer continuous hydrogenation method disclosed by the invention can obtain the hydrogenation product with satisfactory hydrogenation degree.

The invention relates to the field of component detection, in particular to a digital signal processing and controlling system of a non-dispersive infrared gas analyzer. A digital signal processor (DSP) is used as a core of the digital signal processing and controlling system. The digital signal processing and controlling system comprises a DSP chip, an infrared signal conditioning circuit, a 24-bit analog-to-digital converter (ADC) circuit, a temperature acquiring circuit, a gas pressure acquiring circuit, a 16-bit ADC circuit, an external expansion static random access memory (SRAM) circuit, a ferroelectric memory circuit, a real-time clock circuit, a reset circuit with a watchdog and a power monitor, a thermal resistance driving circuit, a key circuit, a digital output circuit, an RS-232/485 interface, a liquid crystal display circuit, a 4-20mA/0-20mA output circuit and software. The amplitude of signals is solved by a spectral analysis method based on fast Fourier transform (FFT), the center of gravity is corrected, the amplitude of the signals is measured accurately, and signal processing accuracy is guaranteed; a mathematical model which meets requirements on engineering application is set up, and the relation between input and output is non-linearly corrected; and temperatures are controlled by using a proportion-integration (PI) control algorithm based on pulse-width modulation (PWM).

The invention provides an alloy chlorination reaction kettle for production of chlorinated polyethylene, which is capable of effectively eliminating reaction temperature delay during synthesis of the chlorinated polyethylene, and is short in production cycle, high in efficiency, low in labor intensity and energy consumption and easy in implementation of automated operation.

The invention discloses a preparation technology of sponge titanium and a reaction furnace of sponge titanium, and belongs to the field of nonferrous metallurgy technology. The reaction furnace of the invention comprises a reacting pot and a cooling pot. The outside of the inner wall of the reacting pot is fixedly equipped with an electrically heated wire which is connected with a conductive rod. The reacting pot is wrapped with an insulation layer and the furnace wall and the upper part of the reacting pot is communicated with an evacuation tube. The cooling pot is equipped with a cooling water jacket, the upper part of which is communicated with an evacuation tube of the cooling pot. The reacting pot and the cooling pot are fixed respectively by the top heads at two sides and in parallel arrangement, and communicated with a central tube. The central tube is wrapped with an inner heating jacket. The upper part of the cooling pot is communicated with a discharge tube. Simultaneously the invention also provides a preparation technology of sponge titanium by using reaction furnace, the technology has the advantages of changing the problem of serial furnace including the unstable production quality, the large energy consumption, the serious environmental pollution, the large operation intensity of worker and the large workload. Changing the furnace to parallel type and the middle connection of using an inner heating tube has the advantages of the energy conservation, safety and the short reaction time.