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8/10/2022 9:10:15 PM
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Status of Waste Oil Regeneration and Brief Introdu
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Original Title Status of Waste Oil Regeneration and Brief Introduction of Its Process Technology Total Cumulative Title 1350 The status of waste oil regeneration and brief introduction of its technology Source Guangdong wiped film evaporator Chemical Authors Yu Yanyan Yang Xin Wang Jie Waste oil is a dihedron which has the dual characteristics of pollution and resource improper treatment will cause environmental pollution and recovery and recycling will save energy and alleviate the pressure of resource shortage According to the provisions of the National List of Hazardous Wastes waste mineral oil belongs to hazardous waste numbered HW08 On February 4 2017 the 2016 edition of the Booz Data shows that although China's waste oil products have always existed there has been no effective progress in the effective utilization of waste oil China's waste oil market is large and will grow with the increase of market demand However in China the reasonable recovery rate of waste oil is not high which is mainly affected by the relevant policies and regulations of national and local industries upstream waste oil recovery links downstream regeneration technology and other restrictions Expand the full text Although the state and the oil industry have been promoting the formulation and implementation of policies from the current point of view although policies and regulations have guiding significance they are not enforced there are no severe penalties and certain financial incentives resulting in many difficulties wiped film distillation in operation Due to the vast land area the investment and understanding of waste oil recovery and regeneration vary from place to place and the implementation is different which leads to many difficulties in the recovery process of waste oil regeneration industry
Hydrofining can reduce the loss of effective substances in oil samples improve the yield of regenerated waste oil and will not produce a large number of waste clay and pollute the environment as in the clay refining process so the hydrofinishing process has gradually replaced the clay refining but because hydrofining requires excessive capital investment and operational constraints So that it can no longer be widely used in small and medium-sized enterprises However from the analysis of the current situation of domestic waste oil regeneration the most attractive method for re-refining waste oil can be the combination of solvent extraction and membrane separation and more research efforts should be made to explore the best solvent and solve the problems arising from membrane treatment Return to Sohu to see more Responsible Editor toptiontech.com
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8/10/2022 9:12:10 PM
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Various kettle-type reactors, reaction principle,
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As long as there is a place for reaction the reactor is indispensable Reactors in chemical plants are more diverse Today Xiaobian <a href="https://www.toptiontech.com/centrifugal-extractor/cbd-centrifugal-extractor.html">cbd centrifugal extractor</a> brings you the reaction principle and structure of the kettle reactor Let's take a look! Kettle-type reactor is also called tank-type or pot-type reactor The reaction principle is shown in the figure Classification of tank reactors 1 <br><br>
In pressurized operation the upper and lower heads are mostly hemispherical or ellipsoidal; while in normal pressure operation the upper and lower heads can be made into flat covers For the convenience of feeding the lower bottom can also be made into a conical shape <a href="https://www.toptiontech.com">jacketed glass reactor</a> 2 Heat transfer device The function of that heat transfer device is to meet the temperature require by the reaction and the types are various Jacket heat transfer Jacket means a jacket applied to the outside of the vessel wall Heat medium such as steam hot water or hot oil can be adde to heat that material in the container (or pipeline) or cooling medium such as cooling wat or other cooling fluid can be introduced to cool the material in the container (or pipeline) External circulation type heat transfer When the heat transfer area of the jacket and the coil can not meet the process requirements or the coil and the jacket can not be installed in the reactor and the heat transfer area can not meet the process requirements the feed liquid in the reactor can be pumped <a href="https://www.toptiontech.com/centrifugal-extractor/hemp-extraction-centrifuge.html">hemp extraction centrifuge</a> out by a pump and circulated back to the reactor after heat exchange by an external heat exchanger Reflux condensation type heat transfer The steam generated in the reactor is condensed by an external condenser and the condensate is returned to the reactor 3 Stirring device Comprises a stirrer a stirring shaft and the like Stirrer to push the static liquid material to move and maintain the fluid flow state required by the stirring process so as to achieve the purpose of stirring <br><br>
Editor (function() { function getBrandHtml() { var brands = [] html = ''; for(var i = 0; i < brandslength; i++) { var brand = brands; if(brandslength i+1) { html+= '<a class="username-link" href="'+brandurl+'" target="_blank">'+brandname+'</a>'; } else { html+= '<a class="username-link" href="'+brandurl+'" target="_blank">'+brandname+'</a>、'; } } return html; }; if(documentgetElementById('linkBtn')){ documentgetElementById('linkBtn')onclick = function() { $('#brands')removeClass('brand');$ ( '# tipInfo')text ( 'Real name responded'); $ ('#linkBtn')remove();$ ('real-response content')css('line-height' '20px');$ ('real-response time')css('line-height' '20px'); }; documentgetElementById('brands')innerHTML = getBrandHtml(); }; })();。 <a href="https://www.toptiontech.com">toptiontech.com</a>
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8/10/2022 9:13:38 PM
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How much do you know about the types, uses and pri
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Original title How much do you know about the types uses and principles of heat exchangers in the petrochemical industry At this stage in the petrochemical industry the application of heat exchanger is very extensive Next Xiaobian shares with you the types and use principles of heat exchangers in the petrochemical industry Heat pipe heat exchanger in petrochemical industry Generally the heat pipe heat exchanger is widely used in cbd crystallization equipment the harsh conditions of recovering waste heat in the petrochemical industry mainly including the production of high-sulfur fuels and other harsh conditions In the production process of petrochemical industry the key facilities are high-temperature heating and cracking facilities It is very economical and easy to achieve and the effect is very satisfactory especially for the high temperature smoke exhaust furnace the smoke exhaust temperature is high which is more superior The gas-liquid heat pipe heat exchanger inserts one end of the heat pipe from the exhaust end and each heat pipe decarboxylation after extraction is wound with fins on the pipe wall to increase the heat absorption surface
Compared with segmental baffles such baffles (called discontinuous helical baffles) can reduce the pressure drop by about 45% under the same working conditions while the overall heat transfer coefficient can be increased by 20% -30% and the size of the heat exchanger can be greatly reduced under the same heat load wiped film evaporator The difference between the spiral baffle heat exchanger and the ordinary shell-and-tube heat exchanger is that the baffles in the shell side are arranged in a spiral shape so that the medium in the shell side is spirally and continuously rotated from the inlet to the outlet and the traditional transverse baffle mode is changed into a longitudinal spiral baffle mode
At the same time in order to achieve a reasonable and economical heat exchanger the heat exchanger must be adjusted from the perspective of structural parameters It is not perfect to consider only the heat exchange area and margin Editor Sum up Being familiar with the types uses and principles of heat exchangers in the petrochemical industry can effectively avoid the premature damage of heat exchangers improve the energy efficiency of the petrochemical industry prevent unnecessary shutdown and avoid the loss of products caused by the problems of heat exchangers —————————————————————— Disclaimer The copyright of this article belongs to the original author If copyright is involved please contact to delete and return to Sohu to see more Responsible Editor toptiontech.com
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8/10/2022 9:14:57 PM
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Structure and working principle of reactor (reacti
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Original title Structure and working principle of reactor (reaction kettle) Source Coal Chemical Knowledge Base The reactor is a device for realizing a reaction process and is used for realizing a liquid-phase single-phase reaction process and a liquid-liquid gas-liquid liquid-solid gas-liquid-solid and other multiphase reaction processes Stirring devices (mechanical stirring airflow stirring etc) Are often nutsche filter dryer installed in the device When the ratio of height to diameter is large multiple layers of stirring blades can be used When the materials need to be heated or cooled in the reaction process a By structure 1 Tubular reactor Consists of a hollow tube or a filled tube with a large length-diameter ratio and can be used for realizing a gas-phase reaction and a liquid-phase reaction Expand 50l rotovap the full text Performance characteristics 1
Among them the stirred tank reactor centered in a vertical vessel is the most typical one Multi-stage series reaction kettle 4 III Tower Reactor Tower equipment for realizing gas-liquid phase or liquid-liquid phase reaction process including packed tower plate tower bubble tower etc jacketed glass reactor Bubble column reactor 1 Bubble column reactor is widely used in medium-speed slow-speed reactions and reactions with large heat release in which liquid phase also participates in the reaction For example the oxidation reaction of various organic compounds the chlorination reaction of various paraffins and aromatic hydrocarbons various biochemical reactions aeration oxidation of sewage treatment and carbonization of ammonia water to produce solid ammonium bicarbonate all use this bubble column reactor Packed column reactor 2 Packed column is a kind of mass transfer equipment in which the packing in the column is used as the contact member between gas and liquid The liquid is sprayed onto the packing from the top of the tower through the liquid distributor and flows down along the surface of the packing
If you need to reprint please be sure to indicate the source and retain the words "energy-saving internal reference" and two-dimensional code I also hope to know more like-minded friends through this platform communicate with each other learn from each other make progress together and make a contribution to the cause of green environmental protection! (Disclaimer This article only represents the views of the author and does not represent the position of this public account If there are intellectual property disputes contributions and cooperation matters please contact) Return to Sohu to see more Responsible Editor toptiontech.com
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8/10/2022 9:16:05 PM
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Instructions for Rotary Evaporator _ Vacuum _ Inst
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The rotary evaporator of our company has formed 2L 3L 5L 10L 20L and 50L series by collecting the essence of similar products at home and abroad and accumulating the successful practical experience of our rotovap distillation company The product design follows the principles of high efficiency practicality and economy Connect the secondary condenser with the gas guide bottle support it with a bracket and install a special PTFE gasket at the connection 6 Connect the collecting bottle with the secondary condenser hold it wiped film distillation with a bracket and install a special PTFE gasket at the connection 7 Insert the main condenser on the auxiliary condenser and fix it with the fixing clip 8 Installation extraction port feed valve and discharge valve 9 Install the rotating bottle on the machine head and press the locking button on the machine head to lock the rotating bottle 10 Place the water bath pot under the rotating bottle and add water to 2/3 of the pot Adjust the water bath height 11 Connect the joint above the vacuum meter with a vacuum hose at the exhaust pipe and connect the other joint to the vacuum pump 12 Connect the cooling water and feeding pipe Precautions for rotary evaporator 1 All glass parts shall be cleaned before installation 2 Apply a small amount of vacuum silicone grease on each standard port and sealing surface to increase the airtightness 3 Be sure to lock the bottle mouth bracket and machine head before the instrument works 4 Do not move the whole machine Application method of rotary evaporator The evaporation rate of the instrument depends on three conditions 1 The better the vacuum degree is rotary vacuum evaporator the faster the speed is The vacuum degree shall not be less than 0096 MPa during water evaporation 2 The higher the water bath temperature the faster the speed generally not more than 80 degrees according to the specific process requirements 3 The lower the cooling water temperature is the faster the speed is and the better the refrigeration effect is (I)
About motor temperature rise The motor of this instrument is a three-phase 220V special motor with E-class insulation The winding is made of polyester high-strength enameled wire The operating environment and altitude are not more than 1000 meters and the ambient temperature is not more than 40 degrees It is normal that the surface temperature of the motor (the difference between the surface temperature of the motor and the environment) does not exceed 45 degrees If the temperature rise exceeds 45 degrees check the relevant transmission lubrication system V Maintenance 1 Glass parts In case of serious dirt dilute sulfuric acid can be used for cleaning 2 Seal ring frequently check the wear degree of the seal ring and replace the worn seal ring in time to ensure the vacuum degree 3 Teflon interface In general it is not necessary to disassemble and wash If there is serious dirt it can be disassembled and washed 4 Water bath; if tap water is used Regularly clean the water stains on the electric heating coil To ensure good heating Return to Sohu to see more Responsible Editor toptiontech.com
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8/10/2022 9:16:36 PM
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Short-path molecular distillation equipment operat
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Original title Operation process of short-path molecular distillation equipment During the operation of the short-path molecular distillation equipment it is necessary to pay attention to certain operation procedures to avoid the thin film distillation unavailability of the entire short-path molecular distillation equipment and the unavailability of the supporting Wuxi Shengze refrigeration and heating temperature control system due to improper operation Generally the short-path molecular distillation equipment has passed the hydrostatic test and test run before delivery and the indicators meet the requirements
Start the motor and observe whether the running direction of the motor is correct It should rotate clockwise not reversely Measure whether the radial swing and axial displacement of the shaft meet the requirements and check whether the seal is tight Check whether the oil level of the reducer is in a normal state and whether the cooling water of the mechanical seal is kept unblocked Turn on the circulating cooling water pump of the short-path molecular distillation equipment to keep the condenser in operation The concentrate container is then opened and the vacuum valve is drawn Open the feed valve and pump in the feed liquid Turn on the power supply start the motor and observe whether the rotation direction of the motor is correct Slowly open the steam valve and connect the steam trap so that the steam pressure is about 015 MPa Observe the discharging condition of the short-path molecular distillation equipment After the equipment runs stably for 5 minutes molecular distillation systems sample and analyze the concentration of the concentrated solution If the concentration is not up to the standard adjust it When the liquid level of the concentrated solution container is about to be full it shall be switched to another container and the switching shall be carried out according to the steps
The shutdown sequence of normal short-range molecular distillation equipment is as follows close the steam valve close the feed valve drain the feed liquid close the discharge valve flush the equipment stop the motor stop the circulating water pump and jet pump and open the vacuum breaking valve When the short-path molecular distillation equipment has no feed liquid or is full of feed liquid the motor cannot be started for stirring winterization filtration It is strictly prohibited to run the motor in the reverse direction When running do not touch the rotating parts with your hands Do not press the button with wet hands to prevent electric shock Short-path molecular distillation equipment should pay attention to some safety knowledge as much as possible during operation to avoid some safety accidents because safety production is very important (This article comes from the network if there is infringement please contact to delete) Return to Sohu to see more Responsible Editor toptiontech.com
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