43 results about "Feed temperature" patented technology

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 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 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 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.

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.

The utility model relates to the technical field of feed stirrers, in particular to a temperature control performance stirrer for meat pigeon breeding feed, which has the capability of moving through a bearing device, can fix the position of the device, has the capability of temporary use under the condition of power failure, stores oil and water through a liquid storage device, and is convenient to use. Meanwhile, an operator can conveniently observe the amount of oil and water, the oil and water can be rapidly heated, energy waste in the heating process is reduced, feed is mixed and stirred through the stirring device, heat preservation is conducted, impurities in the oil and water are filtered through the filtering device, rapid assembly and disassembly are convenient, and the energy-saving and environment-friendly feed processing device is convenient to use. The labor intensity of operators in the cleaning process is reduced, and the practicability of the device is improved; comprising a bearing device, a liquid storage device, a stirring device and a filtering device, the liquid storage device is installed on the bearing device, the stirring device is installed on the bearing device and connected with the liquid storage device, and the filtering device is installed on the stirring device.

The application discloses an open type gradient absorption waste water purification system and method, and relates to the technical field of waste water treatment. The application divides the absorption tower and the regeneration tower into three stages, utilizes the double-stage regenerative module to cooperate with the continuous drainage heater and the steam heater to realize three-stage feed temperature control of waste water, utilizes the double-stage regenerative module to cooperate with the cooler to realize three-stage feed temperature control of purified water, optimizes the fillers of each stage, adopts high-efficiency fillers in the low-temperature and low-speed area, and adopts high-strength fillers in the high-temperature and high-speed area, so that better solutions of overall resistance, efficiency and safety are realized, and the overall heat and mass transfer efficiency can be significantly improved.

The utility model belongs to the technical field of petrifaction, in particular relates to an energy-saving device for increasing the feeding temperature of catalytic dry gas, and aims to solve the problems that a large amount of heat sources cannot be effectively utilized, the difficulty of circulating water cooling is increased, and the energy consumption is low as the existing reaction product-benzene heat exchanger directly enters a reaction product condensation cooler for cooling after heat exchange. According to the technical scheme, the circulating water cooler comprises a catalytic dry gas heat exchanger, a catalytic dry gas heat exchanger, a circulating water heat exchanger and a circulating water heat exchanger, according to the device, on the premise that safe production is guaranteed, effective utilization of low-temperature heat is achieved, important equipment influencing safe production of the device reaches a good operation state, unstable factors influencing operation of the device are reduced, and the safety of the device is improved. Meanwhile, the energy consumption problem and the maintenance cost generated during operation of the device are reduced, and safe and stable operation of the device is facilitated.

The present invention relates to the technical field of general chemical or physical methods performed in the presence of fluids and solid particles. Disclosed is a bisphenol A reactor capable of reducing heat load and preventing catalyst bed clogging. The reactor is used to synthesize bisphenol A using phenol and acetone as raw materials through a heterogeneous catalytic reaction. The reactor is an adiabatic fixed-bed reactor with two upper and lower separated catalyst beds. In the present invention, acetone is separated from the feed and heat exchanged with hot reaction liquid drawn from the middle section of the reactor in a heat exchanger. The vaporized acetone carries a large amount of reaction heat and is then transferred to the feed, significantly raising the temperature of the reaction liquid entering the catalyst bed. This prevents crystallization clogging in the cooler upper bed and significantly reduces the heat load of preheating the reactor feed. Furthermore, the hot reaction liquid in the middle section of the reactor is cooled and then returned to the lower bed, preventing the lower bed from overheating and causing a large number of side reactions, as would be the case when the feed temperature is directly raised.

A method and a process arrangement for treating a feed before a quench column in an integrated process, in which the integrated process comprises at least one gasifier for forming a gasifier flow, at least one cracking furnace for forming a cracker flow, at least one quench column for treating the feed comprising the gasifier flow and cracker flow and at least one transfer line to supply the feed to the quench column. The gasifier flow is cooled at least partly for killing chemical reactions after a gasification, the cracker flow is cooled at least partly after the cracking furnace, the gasifier flow is combined to the cracker flow before a transfer line valve of the transfer line to form the feed to the quench column, and temperature of the feed is controlled to a predetermined temperature of the transfer line before the quench column.

The invention provides a waste heat recovery system and method for preventing acid dew point corrosion, and the system comprises a feed temperature adjusting device which is used for adjusting the temperature of feed entering a heat exchange link; the fluid conveying assembly is used for conveying flue gas to be subjected to waste heat recovery or cold-state feed to be treated to the system; the low-temperature flue gas heat exchange device is used for realizing heat exchange between the waste heat flue gas to be recovered and the fed material subjected to temperature regulation; the output end of the feed temperature adjusting device is in butt joint with a material inlet of the low-temperature flue gas heat exchange device so that the heated feed can be conveyed to the heat exchange device. The feed temperature adjusting device comprises a feed adjusting valve, a mixer and a return adjusting valve; the output end of the feeding regulating valve is communicated with the feeding hole of the mixer; and the input end of the return regulating valve is communicated with the material outlet of the low-temperature flue gas heat exchange device, and the output end is communicated with the return port of the mixer. The technical effects of preventing acid dew point corrosion of smoke on the heating surface of the low-temperature section, improving the waste heat recovery efficiency and reducing the smoke exhaust temperature are achieved.

The present application relates to HCC-240fa separation process based on multiple input multiple output control and its separation device, after receiving cold material flow and feed temperature information in feed total pipeline, multiple input multiple output controller carries out analysis processing, adjusts normal temperature material flow set value; after receiving total flow information of cold material flow and normal temperature material flow addition, tower top condenser backflow information, separation tower tower kettle liquid level information, tower kettle temperature information, carries out analysis processing, adjusts tower top backflow flow set value, adjusts reboiler steam flow set value and tower kettle intermittent discharge time set value, realizes the tower kettle temperature control of separation tower, tower kettle liquid level control and the discharge control of separation tower.The present application guarantees the requirement of upstream material balance discharge, simultaneously reaches the purpose of heat stable feed, makes the stability of separation tower greatly improve, and guarantees the quality of tower top product, greatly reduces the discharge of tower kettle recombination waste, and the economy has been significantly improved.

The utility model belongs to the technical field of chemical engineering, and particularly relates to a DMO rectification feeding and discharging heat recycling device. The system comprises a crude DMO entering device, a heat exchanger, a DMO light component removal tower feeding tank and the like. An outlet pipeline of the crude DMO inlet device is divided into two paths, one path is connected with a first inlet of the heat exchanger through a first regulating valve, and the other path is converged with a connecting pipeline of a first outlet of the heat exchanger through a second regulating valve and then is communicated with a DMO light component removal tower feeding tank. An outlet pipeline of the refined DMO inlet device is connected with a second inlet of the heat exchanger; and a second outlet pipeline of the heat exchanger is divided into three paths. By controlling the opening degree of the regulating valve, the coarse DMO and the fine DMO are subjected to heat exchange by utilizing temperature difference, and the feeding temperature of the coarse DMO is increased while the extraction temperature of the fine DMO is reduced. The system can avoid the electric energy consumption of the cooling fan, reduces the steam consumption, has the heat recovery rate of more than 90%, reduces the occupied area, prolongs the service life, and has good popularization and application values.

The utility model discloses an aquatic product premixed feed detection device which comprises a mixing cylinder, a temperature measuring component is arranged on the top of the mixing cylinder, and a mixing component is arranged in the mixing cylinder. The temperature measuring part comprises a bracket fixedly connected with the top of the mixing barrel, an air cylinder fixedly connected with the top of the bracket, a movable plate fixedly connected with the bottom of the air cylinder, a fixed opening formed in the top of the movable plate, a first positioning plate fixedly connected with one side in the fixed opening and a second positioning plate arranged on the other side in the fixed opening; through the arrangement of the mixing cylinder and the temperature measuring component, the problems that the temperature of the premix needs to be detected when the premix is processed, but only the surface temperature of the premix can be detected when the premix is detected at present, the internal temperature of the premix is relatively inconvenient to detect, and the working efficiency is low are solved. And therefore, the judgment of workers on the temperature of the premix is influenced, the processing effect of the premix is influenced, and the practicability is reduced.