57 results about "Feed temperature" patented technology

The present invention relates to the technical field of solvent purification, and discloses a propylene glycol methyl ether acetate purification control method and a propylene glycol methyl ether acetate purification process, the propylene glycol methyl ether acetate purification control system comprises a rectification device and a rectification control system, the rectification device comprises a rectification tower, a raw material preheater, a condenser, a reflux tank and a reboiler, the rectification control system comprises an environment temperature measuring unit, a tower top temperature measuring unit, a tower bottom temperature measuring unit, a feeding temperature measuring unit and a regulation and control module, the rectification control system is pre-trained with a parameter prediction model, and the parameter prediction model takes the environment temperature, the tower top temperature, the tower bottom temperature and the feeding temperature as input to output regulation and control parameters. The regulation and control parameters comprise the opening degree of a steam valve, the power of a condenser and the opening degree of a return valve, a primary distribution controlled parameter is obtained according to a preset distribution strategy, the primary distribution controlled parameter is specifically the optimized regulation and control parameter, and the tower top temperature is controlled within a preset tower top temperature range according to the primary distribution controlled parameter.

The invention discloses a method and system for adjusting and controlling two-section fluidized freezing equipment, and relates to the technical field of fluidized production adjusting.The method comprises the following steps that S1, at least one group of dry cooling fans and temperature and humidity probes are arranged at the position of a feeding port, the feeding temperature and humidity are monitored in real time, and according to the material type and the feeding number, the temperature and humidity of the feeding port are monitored; the feeding temperature and humidity are detected through a temperature and humidity probe, and whether the dry cooling fan needs to be started or not is judged through a PLC control system; s2, according to a comparison result of the detected feeding temperature and a preset temperature threshold value, starting and stopping of a dry cooling fan are controlled; s3, adjusting air valves are arranged on the first-section mesh belt B1 and the second-section mesh belt B2 correspondingly; s4, at least one group of stirring machines and fans are arranged in the equipment, the stirring machines and the fans are in linkage operation, and the operation frequencies of the stirring machines and the fans are adjusted according to the material state; and S5, the operation state of the equipment is adjusted. According to the method, the product treatment quality is remarkably improved, and the production efficiency is greatly optimized.

The invention concerns a process and apparatus for cracking ammonia in which heated ammonia gas at super-atmospheric pressure is partially cracked in at least two adiabatic reactors in series with interstage heating in which the feed temperature to a first reactor is higher than the feed temperature to a further reactor to produce a partially cracked ammonia gas which is then fed to catalyst-containing reactor tubes in a furnace to produce a cracked gas comprising hydrogen gas, nitrogen gas and residual ammonia gas. The use of the adiabatic reactors enables more efficient heat integration within the process and the higher temperature in the first reactor enables the use of a nickel-based catalyst in that reactor as an alternative solution to the potential problem of the presence of oil in the ammonia.

The embodiment of the invention provides a reaction kettle temperature rise rate control method, device and equipment. The method comprises the following steps: collecting the current material temperature and the current liquid level in the reaction kettle; collecting the feeding flow and the feeding temperature of feeding on a feeding pipeline of the reaction kettle; obtaining a preset heating medium flow calculation formula; according to the current material temperature, the current liquid level, the feeding flow, the feeding temperature and the preset heating medium flow calculation formula, the flow set value of a heating medium is calculated. In this way, the flow of the heating medium of the reaction kettle can be adjusted in real time during feeding, so that the feeding and heating operations of the reaction kettle are combined, the temperature rise rate of the reaction kettle can be regulated and controlled in time, the control hysteresis of the temperature rise rate of the reaction kettle is reduced, the temperature rise rate of the reaction kettle is more stable, and the fluctuation is smaller.

The utility model relates to the technical field of vinyl chloride polymerization production, in particular to a safe feeding device of a solid-liquid-gas three-phase reaction kettle. The safe feeding device of the solid-liquid-gas three-phase reaction kettle comprises a reaction kettle and a pressure stabilizer, the pressure stabilizer is connected with a desulfurization tower through a deoxidation adsorption tower, the desulfurization tower is connected with the reaction kettle through a pre-heater, the reaction kettle is connected with a feeding tank, a temperature control coil pipe is arranged in the reaction kettle and connected with a refrigerating machine through a pipeline, and the refrigerating machine is connected with the deoxidation adsorption tower through a pipeline. And a pre-heating device coil pipe is arranged in the pre-heating device. According to the device, through the cooperative use of the heating sleeve, the connecting pipeline and the pre-heating device coil pipe, the waste heat of the reaction kettle is used for pre-heating a gas-phase raw material, so that the feeding temperature is ensured to reach a proper range, and the influence on the temperature in the reaction kettle due to the too low feeding temperature is avoided, thereby ensuring that a polymerization reaction can be carried out under a stable temperature condition; and the stability of product quality is improved.

The invention discloses an emulsion preparation device and an emulsion preparation method using the same, the device comprises a mixer main body, a liquid inlet conduit, a liquid outlet conduit and a feeding assembly, the mixer main body has a three-way flow channel structure, an optional flow channel is a liquid outlet flow channel, the other two flow channels are liquid inlet flow channels, the liquid outlet conduit is communicated with the liquid outlet flow channel, and the feeding assembly is communicated with the liquid inlet flow channel. The liquid inlet guide pipe is communicated with the liquid inlet flow channel, and the feeding assembly is communicated with the liquid inlet guide pipe. The method for preparing the emulsion comprises the steps that the dispersed phase and the mobile phase are obtained, the continuous phase and the dispersed phase are put into the two liquid inlet flow channels of the mixer body through the liquid inlet guide pipes by means of the feeding assembly, the emulsion formed after mixing flows out of the liquid outlet flow channels and is collected, the flow speed ratio of the continuous phase to the dispersed phase is 2: 1-4: 1, and the total flow speed is 60-750 mL / min. According to the scheme, the emulsion with the appropriate particle size is prepared at the low flow speed, the feeding temperature range is wide, the device is simple, the channel dead volume is small, and the device is suitable for both laboratories and industrial production.

The utility model discloses a green ammonia synthesis heat recovery intelligent flexible control system, which is characterized in that a green ammonia synthesis heat recovery unit is provided with a first bypass pipeline in parallel, the upstream of two parallel branches is provided with a shunting control part, and the shunting control part adjusts the opening degree to control high-temperature synthesis gas to enter the first bypass pipeline; the heat of the high-temperature synthesis gas is intelligently and flexibly distributed and utilized; a control loop is formed by a feeding flow, feeding temperature and analysis system, an intelligent flexible control system and the shunting control part; according to the collected production load information, an instruction signal is formed through processing and analysis, decision making and control of the intelligent flexible control system, the opening degree of the flow dividing control part is interactively adjusted in real time, and the flow of the first bypass pipeline is changed, so that the flow is matched with the feeding gas flow and the heat exchange capacity of the efficient heat exchanger; and the temperature in the green ammonia synthesis tower is kept stable under various loads. The method is suitable for synthesizing green ammonia by taking green hydrogen as a raw material, and intelligent flexible self-heating process control that loads move along with a source is realized.

The utility model belongs to the field of feed production technology, and is particularly a metering storage device for the production of mineral feed. The cooling pipe of the existing equipment is arranged on the side of the storage tank, which makes it impossible to absorb the feed temperature in the center of the storage tank, and the problem of moisture and heat agglomeration easily occurs. The following scheme is proposed, which includes a storage box, a ventilation structure is arranged inside the storage box, a stirring structure is arranged in the center of the storage box, an observation window is opened at one end of the storage box, and the ventilation structure includes two ventilation pipes symmetrically plugged into the bottom end of the storage box, the tops of the two ventilation pipes are welded with the same connecting pipe, and the sides of the two ventilation pipes are equidistantly plugged with a plurality of nozzles. The utility model uses an air pump to transport external air to the inside of two ventilation pipes symmetrically arranged inside the storage box, and sprays it out through a plurality of nozzles, so as to reduce the humidity and temperature inside the storage box and avoid the problem of agglomeration of mineral feed.

The utility model relates to the technical field of black soldier fly breeding equipment, and discloses a feeder with a heating function, comprising a base, a slurry box is fixedly connected to the top of the base, a connecting pipe is fixedly connected to the bottom of the slurry box, the slurry box is connected to a rotor pump through the connecting pipe, the other end of the connecting pipe is connected to an electric reversing valve, one end of the electric reversing valve is connected to a delivery pipe, one end of the delivery pipe is connected to a heating box for heating slurry, the feeding box is connected to the delivery pump through the feeding pipe, the rotor pump is started by controlling the control box to allow the slurry in the slurry box to enter the cold and hot exchange pipe, the heating pipe heats the cold and hot exchange pipe at the same time, and then the cold and hot exchange pipe and the slurry perform cold and hot exchange, the slurry is heated and input into the feeding box through a pipeline, and then the delivery pump sucks the slurry through the delivery pump and discharges it into the black soldier fly breeding, thereby achieving the adjustment of feed temperature, promoting larvae eating, shortening breeding time, and stabilizing production rhythm.

The utility model relates to the technical field of energy conservation of coal-fired boilers, in particular to a system for increasing the feed water temperature of a boiler, which adopts a modular design, ensures the effective increase of the feed water temperature, and further enhances the operation efficiency and the overall performance of the boiler. According to the utility model, the temperature of feed water is increased, so that the boiler can operate more efficiently, the SCR full-load denitration is facilitated, and the potential and advantages in the aspects of improving the energy efficiency and protecting the environment are shown. The temperature of feed water entering the boiler is increased, then the temperature of flue gas at an SCR inlet is increased, and full-load denitration and deep peak regulation of a unit are facilitated.

The invention relates to an advanced mixed acid feeding control method for cellulose acetification reaction, which comprises the following steps of: measuring the heat change of a system under actual production conditions to obtain the actual unit mass reaction heat of exothermic reaction of water and acetic anhydride and the actual consumed mixed acid amount when the temperature of the system is increased by 1 DEG C, and eliminating the inherent noise variables of stirring, jacket cooling, heat preservation and other equipment; comparing the heat change before and after the reaction neutralizer is added into the system with the actual unit mass reaction heat of the exothermic reaction of the water and the acetic anhydride, and calculating the system temperature variation (TSR) caused by the exothermic reaction of the water and the excessive acetic anhydride according to the actual consumed mixed acid amount when the temperature of the system is increased by 1 DEG C; a relation model between core process parameters such as reaction neutralizer feeding amount, feeding temperature and system temperature change and TSR is established, a control algorithm is written, advanced control is performed on mixed acid feeding according to real-time data of the process parameters, and the purpose of reducing mixed acid consumption is achieved.

The invention provides a grain-saving white feather broiler breeding method, and relates to the technical field of white feather broiler breeding. According to the method, henhouse environment control, breeding management and nutrition supply are combined, the growth potential of the white feather broilers is synergistically improved, and the white feather broilers of 40 days old have the slaughtering weight of 3 kg, the feed conversion ratio of 1.30-1.34: 1 and the European benefit index of 550 or above; wherein the henhouse environment control comprises feeding temperature control, feeding humidity control, henhouse air quality standard control and henhouse light control; the breeding management comprises the step of feeding by adopting a free feeding mode without controlling feed in a clean trough in the whole process; the nutrition supply comprises the step of respectively feeding pellet feed with different components and different granularities according to different day ages. By means of the grain-saving breeding method, the slaughtering time of the chickens can be shortened, the feed consumption can be reduced, excrement discharge can be reduced, then a large-scale efficient production mode of the cage-rearing white feather broilers is established, and remarkable economic benefits and environmental protection effects are achieved.

The utility model provides an external heat extraction alkylation capacity expansion system which comprises a feeding pipe, a first heat exchanger, a second heat exchanger, an alkylation reactor, a first compressor, a third heat exchanger, a refrigerant water tank and a refrigerating unit, the feeding pipe sequentially passes through the first heat exchanger and the second heat exchanger, and the second heat exchanger is connected with the inlet end of the alkylation reactor; the outlet end of the alkylation reactor is connected with the first compressor; the second heat exchanger is further connected with a third heat exchanger through a bypass, the third heat exchanger, the refrigerant water tank and the refrigerating unit are sequentially connected to form a circulating water path, a circulating pump is arranged on the circulating water path, and the third heat exchanger is connected with the inlet end of the alkylation reactor. According to the alkylation reactor, the device capacity expansion can be better realized in the allowable range of the airspeed of the reactor by reducing the raw material feeding temperature and the reaction temperature, meanwhile, the refrigeration load can be flexibly adjusted according to the feeding temperature of the alkylation reactor, and the shutdown time is short and the equipment transformation cost is low when the equipment is upgraded.

The invention discloses an automatic granulation process of a boiling granulation dryer. The automatic granulation process comprises the following steps: S1, building a granulation system; s2, when a fluidized bed is preheated to the feeding temperature, powder is fed into the fluidized bed, and then the powder is heated to the set material temperature; s3, starting automatic segmented granulation; s4, the materials are dried for t5 minutes in a delayed mode; s5, starting material coloring; s6, drying the materials for t7 minutes; and S7, the air inlet temperature is reduced, dry cold air is conveyed into the fluidized bed, the material temperature is reduced, and when the material temperature is smaller than or equal to the discharging temperature value, shutdown is conducted, and the materials are output. According to the invention, the traceability and reducibility of batch products are ensured, and the defects of manual operation are overcome; in the granulating process, the material bed collapse is avoided, and the fullness and uniformity of the medicine component of each granule are ensured.

Method for operating a roller press (1) for compacting or briquetting material, wherein the roller press (1) has two counter-rotating press rollers (2) between which a roller gap (W) is formed and at least one of the roller surfaces is provided with a profile, wherein the material (M) in the roller gap (W) between the roller surfaces is pressed into a briquette (3) or into briquettes or a briquette strand, wherein the rollers (2) are preferably cooled during operation, characterized in that that during operation at least one characteristic parameter is continuously determined which depends on the formation of deposits (7) of the material (M) on the profiled roller surface or on the profiled roller surfaces and that one or more operating parameters of the press are changed depending on at least one determined characteristic value in order to reduce caking (7), that the operating parameter(s) are changed by means of a control system in such a way that a deviation of a determined actual value (I) of the characteristic parameter(s) from a target value (S) of the characteristic parameter(s) is minimized, where the press (1) is operated with a variable pressure (P) as an operating parameter and the pressure (P) is changed by a control system depending on the determined characteristic value. and / or the press (1) with variable cooling and / or variable temperature (T) and / or variable feed temperature (T) A ) is operated as an operating parameter and the cooling and / or the temperature (T) and / or the input temperature (T) A) is changed by a control system depending on the determined parameter and / or the press (1) is operated with a variable feed of the input material, namely with a variable quantity flow or mass flow of the supplied input material as an operating parameter, and the supplied quantity of material or the quantity flow or mass flow (m) of the supplied input material is changed by a control system depending on the determined characteristic value and / or the press (1) is operated with a variable rotational speed as an operating parameter and the rotational speed is changed by a control system depending on the determined characteristic value, and whereby A vibration value is determined as a characteristic value by a measurement using a vibration sensor (8). or A fluctuation value is used as a characteristic value, which is determined from fluctuations of a machine parameter, wherein the fluctuation value is determined from fluctuations in the gap width of the roller gap or from fluctuations in the contact pressure of one or both press rollers or from fluctuations in the motor current or motor torque of one or both drives of the press rollers.

The invention discloses a feeding temperature adjusting system of a polycrystalline silicon reduction furnace, and relates to the technical field of polycrystalline silicon production.The feeding temperature adjusting system of the polycrystalline silicon reduction furnace comprises a furnace body, a plurality of exhaust pipelines and a cooling structure.The exhaust pipelines are installed at the top of the furnace body and used for exhausting waste gas in the reduction furnace; the cooling structure comprises an output pipeline, an input pipeline, a liquid pump, a cooling pipe and a fan, the liquid pump is mounted on the furnace body, the output pipeline is mounted at an output port of the liquid pump, the input pipeline is mounted at an input port of the liquid pump, the cooling pipe is mounted between the output pipeline and the input pipeline and wound on the outer side of each exhaust pipeline, and the fan is arranged on the furnace body. And air is blown towards the exhaust pipeline for heat dissipation. The operation safety of polycrystalline silicon production equipment is improved, the service life of the equipment is prolonged, and the maintenance cost is reduced, so that a powerful technical guarantee is provided for stable production of polycrystalline silicon.

The invention discloses a feed puffing and drying device with an intelligent temperature control function and a drying method, and relates to the technical field of puffing and drying. The feed puffing and drying device with the intelligent temperature control function comprises a base, a conveying cylinder is mounted on a supporting seat, a mounting frame is mounted on the conveying cylinder, and a heating wire is mounted in the conveying cylinder; the mounting frame is provided with a die orifice, a back pressure valve is mounted on the mounting frame, the back pressure valve is arranged between the die orifice and the conveying cylinder, a temperature sensor is mounted on the mounting frame, a heating controller is mounted on the mounting frame, a drying chamber is mounted on the side, close to the mounting frame, of the base, and the driving motor drives a screw of the conveying cylinder to convey and pressurize feed. The heating wire heats the feed, when the high-temperature and high-pressure feed passes through the die orifice and is subjected to puffing treatment, the temperature sensor transmits internal feed temperature data back to the heating controller, the heating controller can control the heating wire to increase the heating temperature or stop heating according to the temperature requirement, intelligent temperature control is achieved, and the feed puffing quality is guaranteed.

The present disclosure is directed to a hydronic system (1) for transferring thermal energy from a heat pump (3) to produce domestic hot water, DHW, wherein the hydronic system (1) comprises: • a heat pump feed circuit section (7) for transporting a heat pump flow (qH) downstream of a heat pump circuit pump (11) for driving the heat pump flow (qH) through a heat pump (3); • a DHW system (49) comprising a thermal transfer element (61) and an electric heater (77), • a load feed circuit section (13) for transporting a load flow (qL) that goes at least partly through the thermal transfer element (61), wherein the thermal transfer element (61) is arranged to thermally couple at least part of the load flow (qB) with a freshwater flow (qFW); • a storage feed circuit section (19) for transporting a storage flow (qS) that goes through a thermal energy storage tank (23), wherein the storage flow (qS) is selectively directable in a charging direction in an operation mode of the hydronic system (1) in which the thermal energy storage tank (23) is charged with thermal energy and in a discharging direction in another operation mode of the hydronic system (1) in which thermal energy is discharged from the thermal energy storage tank (23), wherein the heat pump feed circuit section (7), the load feed circuit section (13) and the storage feed circuit section (19) are connected at a feed connection point (27), wherein the electric heater (77) is arranged in the load feed circuit section (13) downstream of the feed connection point (27); • a load flow feed temperature sensor (79) for determining a load flow feed temperature (TL) of the load flow (qL), wherein the load flow feed temperature sensor (79) is arranged at the load feed circuit section (13); • a load circuit pump (17) for driving the load flow (qL); and • control electronics (20), wherein the control electronics (20) is configured to control stepwise or gradually a heating power of the electric heater (77) and, depending on the operation mode of the hydronic system (1), to directly or indirectly control a speed of the load circuit pump (17) so that a deviation of the load flow (qL) from a reference load flow (qLref, qLcompref) is minimised, and / or to directly or indirectly control a speed of the heat pump circuit pump (11) so that a deviation of the load flow feed temperature (TL) from a reference load flow feed temperature (TLcompref) is minimised.

The utility model relates to the technical field of preparation of carbon nanotubes, in particular to a cooling and feeding mechanism for preparing carbon nanotubes. The cooling device is arranged at the feeding end of the tubular heating furnace and comprises a furnace tube feeding part and a cooling jacket, the furnace tube feeding part is arranged at the feeding end of the furnace tube, and an operation opening is formed in the furnace tube feeding part; the feeding guide pipe penetrates into the operation opening and extends into the furnace tube; the outer wall of the furnace tube feeding part is wrapped with a cooling jacket, and a space is reserved between the interior of the cooling jacket and the outer wall of the furnace tube feeding part to form a cooling cavity for a cooling medium to flow. According to the utility model, the feeding temperature of the feeding part of the furnace tube is reduced, a catalyst precursor is prevented from being volatilized in advance at the feeding end of the furnace tube, and the catalyst precursor is ensured to be volatilized in a specific temperature zone and react with feed gas; and meanwhile, the operation safety of operators is ensured.

The utility model relates to the technical field of feed production, in particular to an efficient dedusting and cooling device for feed production, which comprises a hopper, a connecting pipe, a body, a conveyor belt and a filter plate, the hopper is fixed at the upper end of the connecting pipe, the body is fixed at the lower end of the connecting pipe, the conveyor belt is rotatably connected at one end of the body, and the filter plate is fixed inside the body. A cooling device is fixedly arranged on the side face of the connecting pipe and comprises an air inlet pipe and an air outlet pipe, the air inlet pipe is fixed to one end of the connecting pipe, the air outlet pipe is fixed to the end, away from the air inlet pipe, of the connecting pipe, a connecting frame is fixedly connected to the interior of the air inlet pipe, and a servo motor is fixedly connected to the interior of the connecting frame; a fan is fixedly connected to the output end of the servo motor, a blocking frame is fixedly connected to the interior of the joint of the air inlet pipe and the connecting pipe, and a blocking frame is fixedly connected to the interior of the joint of the air outlet pipe and the connecting pipe. Through cooperative work of the components, the temperature of the feed can be rapidly and effectively reduced, and the rapid cooling efficiency of the feed is improved.

The present invention relates to the field of feed fermentation technology, and discloses an environmental control method and system for mixed fermentation of animal and plant proteins, the method comprising: real-time collection of feed temperatures in different zones during mixed fermentation feed fermentation, determining the stirring time of the feed, after stirring, collecting the feed temperature and the fermentation environment temperature, and adjusting the fermentation environment temperature once according to the feed temperature and the remaining fermentation time; after the first adjustment is completed, collecting the carbon dioxide concentration during feed fermentation, and making a second adjustment to the fermentation environment temperature according to the carbon dioxide concentration and the remaining fermentation time; after the second adjustment is completed, collecting the feed humidity value, and adjusting the current fermentation environment humidity according to the ratio between the feed humidity value and the fermentation environment humidity. The present invention optimizes the fermentation process by accurately monitoring and dynamically adjusting the fermentation environment temperature, the fermentation environment humidity and the carbon dioxide concentration, thereby improving the uniformity, efficiency and quality of feed fermentation.

The invention relates to a process and apparatus for cracking ammonia, wherein heated ammonia gas at superatmospheric pressure is partially cracked in at least two adiabatic reactors in series with interstage heating, wherein the feed temperature of the first reactor is higher than the feed temperature of the further reactors, to produce partially cracked ammonia gas which is then fed to a catalyst-containing reactor tube in a furnace to produce cracked gas comprising hydrogen, nitrogen and residual ammonia gas. The use of adiabatic reactors makes the heat integration in the process more efficient, and the higher temperature in the first reactor enables the use of a nickel-based catalyst in that reactor as an alternative solution to the potential problem of the presence of oil in the ammonia.

The invention discloses a carbon capture optimization energy-saving method for high-humidity flue gas, which is characterized by comprising the following steps: step 1, according to the heat and temperature characteristics of a carbon capture system, coupling a set of refrigeration cycle mechanism based on an HFO-1336mzZ refrigerant on the original carbon capture system so as to save external source steam; and secondly, a refrigerant HFO-1336mzZ is combined with a refrigeration cycle mechanism, and temperature coupling parameters are optimized to achieve the comprehensive effect of replacing cooling and supplementing a heat source. According to the invention, a conventional flue gas carbon capture water scrubber is canceled, and partial steam in the desorption process is replaced. With high-moisture-content flue gas obtained after waste incineration as an example, the flue gas flow is calculated to be 1000 kg / s, the mass flow of H2O and CO2 is 151 kg / s H2O, the mass flow of CO2 is 144 kg / s CO2, the raw material temperature is 140 DEG C, the temperature is reduced to 50 DEG C, and the equivalent generated intensified latent heat capacity is 79 kg H2O / s. If 1.2 kg of steam is needed for capturing 1 kg of CO2, 172.8 kg of steam is needed, the heat loss in the new refrigeration cycle heat exchange process is set to be 15%, and the saving rate of the external source steam in the desorption process is 38.9%.

The invention discloses a shut-down method of a diesel oil liquid phase hydrogenation device, which comprises the following steps: (1) firstly reducing the feeding temperature of a diesel oil raw material, introducing supplementary hydrogen into the diesel oil liquid phase hydrogenation device by a new hydrogen compressor at the same time, stopping feeding the diesel oil raw material after the reaction temperature is reduced, introducing light distillate oil to wash each catalyst bed layer in a reactor, and stopping feeding the light distillate oil after the reaction temperature is reduced; after the washing is finished, stopping injecting the light distillate oil; (2) closing a supplemental hydrogen valve, enabling supplemental hydrogen to pass through the heating furnace and the gas-liquid mixer, enabling the heated supplemental hydrogen to enter from the top of the reactor to perform first purging, then introducing part of fuel gas of the heating furnace into a catalyst bed layer at the lower part of the reactor to perform second purging, stored oil of the lower bed flows out from the bottom of the reactor under the combined action of supplementary hydrogen and fuel gas. According to the method, the oil carrying effect of the catalyst during shutdown is effectively improved, the purging time is shortened, and the shutdown process of the liquid-phase hydrogenation device can be rapidly completed.

The invention discloses a compact cross temperature control method based on a network-on-chip, relates to the technical field of multiprocessor embedded development, and designs a staggered phase control strategy to increase the node correction frequency of a minimum network unit in a control period and avoid a thermal problem caused by synchronous temperature control. Designing a negative feedback temperature control strategy to control an interaction behavior between a node and an adjacent node so as to further stabilize the temperature of the node, comparing distribution of node types in the network-on-chip into a graph coloring problem based on a control phase distribution algorithm, setting pruning constraints and selection constraints to optimize a backtracking method, and rapidly generating an optimal type distribution scheme; the optimal cross temperature control of the network-on-chip is realized by combining a staggered phase control strategy and a negative feedback temperature control strategy, a performance evaluation scheme is designed, and the evaluation indexes of the method provided by the invention are superior to those of a comparison scheme through inspection, so that the thermal problem of the network-on-chip is effectively solved.

The invention discloses a low-temperature vacuum concentration device for fruit extracts, and particularly relates to the technical field of vacuum concentration devices.The low-temperature vacuum concentration device comprises a low-temperature vacuum concentration tank, a discharging pipe is arranged at the bottom of the low-temperature vacuum concentration tank, a concentrated product discharging valve is fixedly installed on the discharging pipe, and a discharging pipe is arranged at the top of the low-temperature vacuum concentration tank; a discharging electromagnetic valve is fixedly installed at the bottom of the discharging pipe, a four-way pipe is fixedly installed at the bottom end of the discharging pipe, a backflow pipe is fixedly installed at the bottom end of the four-way pipe, and a backflow electromagnetic valve is fixedly installed at the end, close to the four-way pipe, of the backflow pipe. By arranging the discharging electromagnetic valve, the control panel, the cooling controller, the feeding temperature sensor and the like, a fruit extract can be further cooled before low-temperature vacuum concentration of the fruit extract, so that the fruit extract can be quickly subjected to low-temperature vacuum concentration after entering the low-temperature vacuum concentration tank; the concentration efficiency is greatly improved, and popularization and application are facilitated.

A method for producing a hydrocarbon according to the present disclosure includes a step of subjecting a feedstock to fluid catalytic cracking by using a fluid catalytic cracking unit including a reactor and a regenerator, in which the feedstock includes FT synthetic oil, and a feed temperature x (unit: ° C.) of the feedstock, a feed rate y1 (unit: ton / h) of the feedstock, a feed rate y2 (unit: ton / h) of a fuel oil to be fed into the regenerator, and a circulation rate z1 (unit: ton / h) of a catalyst circulating the reactor and the regenerator satisfy a specific inequality expression.

The invention relates to the technical field of energy recovery, in particular to a feedforward control method and system for a steel slag waste heat recovery device, and the method comprises the steps: obtaining a feeding flow signal and a discharging temperature signal, carrying out the scaling processing conversion of the feeding flow signal and the feeding temperature signal, obtaining a feeding flow value and a discharging temperature value, and calculating the feeding flow value and the discharging temperature value; carrying out product calculation on the feeding flow value and a preset adjustable coefficient to obtain a basic rotating speed set value, carrying out difference calculation on the discharging temperature value and a preset temperature set value to obtain a temperature deviation value, carrying out proportional calculus operation on the temperature deviation value to obtain a speed adjustment value, and updating the basic rotating speed set value according to the speed adjustment value, and a real-time control instruction is generated according to the real-time rotating speed set value, and the variable frequency motor is controlled to respond to output. Efficient and stable operation of the waste heat recovery device is achieved.

A fluidized catalytic reactor connected to a start-up heater is provided. The start-up heater provides sufficient heat to a catalyst containing stream to gradually increase the feed temperature. This allows for a critical volumetric flow rate to be achieved so that catalyst can be recovered from product instead of being entrained in product.

The invention provides a pipeline structure for preventing tantalum powder oxidation fire and an electromagnetic separation device, and relates to the technical field of electromagnetic separation equipment, the pipeline structure comprises a feeding pipeline, a feeding temperature measuring element, a first blanking pipeline, a first inert gas pipeline and a blanking temperature measuring element; the bottom end of the feeding pipeline is communicated with a feeding hole of the electromagnetic adsorption mechanism; a feeding valve is arranged in the feeding pipeline; the feeding temperature measuring element is arranged in the feeding pipeline; the top end of the first blanking pipeline is communicated with a blanking port of the electromagnetic adsorption mechanism; a blanking valve is arranged in the first blanking pipeline; one end of the first inert gas pipeline is connected with an inert gas source, and the other end of the first inert gas pipeline is communicated with the first blanking pipeline; the blanking temperature measuring element is arranged in the first blanking pipeline; the temperature of the magnetic separation pipeline can be monitored, the fire behavior or potential combustion hidden danger can be controlled, and serious fire accidents of tantalum powder in the magnetic separation process are avoided.