11results about How to "Not easy to scale" patented technology

The application relates to the technical field of polyolefins, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin, the method comprising mixing olefin monomers, a catalyst and an additive, and performing a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers, the nonpolar monomers are selected from one or more than two of ethylene, alpha-olefins and internal olefins, and the polar monomers are selected from one or more than two of enol, unsaturated carboxylic acids and unsaturated carboxylic acid esters; and the catalyst is selected from a post-transition metal complex shown in formula (I). The application can eliminate the catalyst loading process, realize olefin homogeneous catalyst polymerization self-forming, and prepare polyolefins with good particle morphology.

The utility model discloses an electric water heater, including phase change gall and water gall, be provided with heating rod in water gall, and heating rod is used for heating the water in water gall, the phase change gall has the phase change material for heat storage and heat release, and the phase change gall still includes the heat exchange pipe who communicates with water gall, and the water that flows through heat exchange pipe can absorb heat from phase change material, can also release heat to phase change material, in the height direction of phase change gall, along the flow direction of water, at least partial heat exchange pipe is arranged from top to bottom, and the electric water heater still includes the circulation pipe who communicates water gall and heat exchange pipe, when heating rod works, and the hot water in water gall can circulate and flow between heat exchange pipe and water gall through circulation pipe. The electric water heater provided in the application embodiment can simplify the structure and manufacturing process of electric water heater, reduce manufacturing cost and use cost, realize efficient energy storage simultaneously, in addition, can also maintain the better heat exchange effect in the long term in the use process.

This invention relates to the field of polyolefin technology, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin thereof. The method includes mixing olefin monomers, a catalyst, and an auxiliary agent to carry out a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers; the nonpolar monomers are selected from one or more of ethylene, α-olefins, and internal olefins; the polar monomers are selected from one or more of enols, unsaturated carboxylic acids, and unsaturated carboxylic acid esters; the catalyst is selected from a post-transition metal complex of formula (I). This invention eliminates the need for catalyst loading in the process, achieves self-forming polymerization of olefins using homogeneous catalysts, and prepares polyolefins with good particulate morphology.

This utility model discloses an anti-scaling preheater for a high COD wastewater MVR system, comprising: a U-shaped outer sleeve assembly, an H-shaped intermediate sleeve, and an inner sleeve. The H-shaped intermediate sleeve is concentrically fitted inside the U-shaped outer sleeve assembly, and the inner sleeve is concentrically fitted inside the H-shaped intermediate sleeve. The ends of the H-shaped intermediate sleeve inside the U-shaped outer sleeve assembly are all closed structures. An expansion joint is provided at one end of the U-shaped sleeve assembly, and an ultrasonic descaling device is provided on one side of the upper end of the U-shaped outer sleeve assembly. This utility model has the following advantages: the preheater is modularly designed, allowing multiple sets to be used in series, which is convenient for transportation. The annular material channel formed between the three sleeves makes the material a thin liquid layer, resulting in a high heat transfer coefficient. The hot and cold fluids flow completely in opposite directions, and ultrasonic descaling is achieved. Furthermore, the expansion joint on the U-shaped outer sleeve assembly, which facilitates heat exchange of the material, can effectively prevent damage to the outer sleeve due to thermal expansion and contraction.

The utility model discloses a two-in-one graphite synthesis furnace scaling inhibiting cooling device, and particularly relates to the technical field of cooling, the two-in-one graphite synthesis furnace scaling inhibiting cooling device comprises a two-in-one graphite synthesis furnace, a spiral cooling pipe is buried in the cylindrical side wall of the two-in-one graphite synthesis furnace, and the bottom of the spiral cooling pipe extends out of the side wall of the two-in-one graphite synthesis furnace to be communicated with a heat exchanger; the heat exchanger is provided with a plurality of vertical through grooves, the heat exchanger is slidably provided with a scraper attached to the outer surface of the heat exchanger, the bottom of the scraper is in threaded connection with a screw, the heat exchanger and the scraper are jointly sleeved with a heat exchange box, a driving motor is fixedly installed on the outer wall of the heat exchange box, and the output end of the driving motor is coaxially and fixedly connected with the screw. The top of the spiral cooling pipe communicates with a pure water tank, a branch water pipe at the bottom of the pure water tank communicates with the water return pipe, a piston is slidably installed in an inner cavity of the pure water tank, a through hole is formed in the top of the pure water tank, and the heat exchange efficiency can be kept stable for a long time.

This utility model discloses a dual-purpose (dry and wet) heat exchange tube, belonging to the field of heat exchange technology. It includes a flat heat exchange tube with straight-through S-shaped fins connected to it. A partition plate is fixed inside the flat heat exchange tube, and a baffle plate is installed inside the tube. A connecting assembly is installed at the end of the tube, and a support and protective structure is snapped onto it. Using a flat heat exchange tube in conjunction with straight-through S-shaped fins achieves both dry and wet application, reducing equipment size. The straight-through S-shaped fins have low resistance, are easy to clean with cold water, have no dead corners, and are not prone to scaling. Even if scaling occurs, it can be thoroughly removed by using a descaling agent and high-pressure water rinsing without damaging the fins. The partition plate and baffle plate inside the flat heat exchange tube can change the flow state, increase turbulence, and thus improve heat exchange efficiency. The support and protective structure provides support for the flat heat exchange tube.

The invention relates to the technical field of vinyl acetate-ethylene copolymer emulsion, and discloses vinyl acetate-ethylene copolymer emulsion and a preparation method thereof, and a polymer cement waterproof coating, the copolymer emulsion comprises the following raw material components by mass: 30-45 parts of vinyl acetate; 14 to 18 parts of ethylene; 0.3 to 0.7 part of an emulsifier; 1-3 parts of a protective colloid; 0.5 to 2.5 parts of a functional high-molecular polymer; the use amount of water is 40-45 parts by weight; wherein the protective colloid is polyvinyl alcohol and / or hydroxyethyl cellulose, and the functional high-molecular polymer is polyacrylamide. The polymer cement waterproof coating has relatively high low shear viscosity, so that the sagging resistance of the JS waterproof coating is improved.

The application provides an underwater hydraulic hoist, which comprises a hydraulic cylinder, a piston rod and a power assembly, the piston rod extends out of the hydraulic cylinder to form an outer acting part, further comprises a flexible protection assembly and a filter assembly, the flexible protection assembly, the hydraulic cylinder and the outer acting part are sealingly connected to form a flexible bin, and the flexible bin is in communication with the filter assembly. The filter assembly comprises a filter, the filtering-out end of the filter is sealingly connected with the flexible bin, and a check valve is arranged at the filtering-in end. A breathing pipe is arranged in a cable assembly. The underwater hydraulic hoist provided by the application can ensure that the outer acting part of the piston rod is separated from the external dirty water body through the flexible protection assembly and the filter assembly, and prevent the piston rod from being damaged or leaking due to scaling and the like. The application has the advantages of simple structure, reliable operation, convenient installation and the like.

This invention relates to the field of polyolefin technology, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin thereof. The method includes mixing an olefin monomer, a catalyst, and an auxiliaries to carry out a polymerization reaction; the olefin monomer contains a nonpolar monomer and a polar monomer; the nonpolar monomer is selected from one or more of ethylene, α-olefins, or internal olefins; the polar monomer is selected from one or more of enols, unsaturated carboxylic acids, and unsaturated carboxylic acid esters; the catalyst is selected from a non-ceramic pre-transition metal complex of formula (I), wherein M is selected from a Group IVB metal; R 11 -R 15 Each component is independently selected from hydrogen, halogen, hydroxyl, substituted or unsubstituted C1-C20 hydrocarbon groups; X is selected from halogen or C1-C10 hydrocarbon groups, and n is 1 or 2. This invention eliminates the need for catalyst loading in the process, enabling self-forming of homogeneous catalyst polymerization of olefins and preparing polyolefins with good particulate morphology.

The utility model discloses a kind of processor and processing system that can handle wastewater, waste oil in organic waste gas, processor includes liquid inlet tank, vapor-liquid separation tank being set on the top of liquid inlet tank and the vaporization pipe fixedly communicated with vapor-liquid separation tank and liquid inlet tank at two ends;First heating device is equipped on the vaporization pipe, the liquid inlet tank is fixedly communicated with processor import pipe, the vapor-liquid separation tank top is fixedly communicated with exhaust pipe, the vapor-liquid separation tank bottom is fixedly communicated with liquid guide pipe.Reclaimed rubber in production process, the hot dirty organic waste gas containing water vapor, oil gas and the wastewater and waste oil that pipeline is cooled out during waste gas conveying are all purified and gasified then enter incinerator and are incinerated, so impurity is almost none, to be more easily combusted, and combustion is more sufficient and thorough, residue after combustion will be little, incinerator is not easy to block, more durable, prolong the service life of incinerator.

The invention relates to the technical field of electrochemical water treatment, in particular to a cathode for electrochemical water treatment, an electrochemical water treatment system and a hardness removal method for industrial wastewater. The cathode comprises a cathode substrate and an electromagnet integrated on the cathode substrate; the electromagnet is used for generating a gradient magnetic field near the working surface of the cathode substrate and controlling the gradient magnetic field to be opened and closed; and the gradient magnetic field is used for attracting the magnetic particles to form an attachable and detachable functional layer on the working surface of the cathode substrate. According to the cathode, the capacity of actively generating and withdrawing the gradient magnetic field on the surface of the electrode is obtained by integrating the electromagnet on the substrate. A functional layer composed of magnetic particles can be formed on the surface of the electrode according to needs, and after load deposition of the functional layer is completed, the functional layer can be integrally removed from the surface of the cathode by removing the magnetic field. Therefore, a deposition interface is converted from an electrode surface to a periodically replaceable consumable interface. Therefore, the scaling risk and the cleaning and maintenance difficulty on the surface of the cathode are reduced, and the service life of the cathode is prolonged.