99results about How to "Increased disorder" patented technology

The invention discloses a wet-type electric precipitator and an electric precipitation desulfurization device comprising the same. The wet-type electric precipitator comprises anode plates, cathode rays, two cathode ray suspension frames, an insulator chamber and a cleaning water pipe, wherein multiple bending plates which extend along the vertical direction and are arranged in parallel are used as the anode plates; the multiple cathode rays are suspended between two adjacent bending plates and are bent in tendency the same as that of the bending plates; multiple barbs are fixed on each cathode ray at intervals; the two cathode ray suspension frames are respectively positioned above and below the anode plates and are used for fixing the top ends and bottom ends of the cathode rays; the insulator chamber is used for fixing the ends of the two cathode ray suspension frames; and the cleaning water pipe is arranged above the anode plates. The wet-type electric precipitator disclosed by the invention is used in the desulfurization device, is arranged between two-stage demisting layers in a desulfurization tower and is used for performing fine dust removal on flue gas subjected to primary demisting.

The invention relates to the technical field of sewage treatment, and specifically relates to an airlift type integrated sewage treatment device. The airlift type integrated sewage treatment device comprises an adjusting tank, an anaerobic tank, an anoxic tank, an aerobiotic tank and a sedimentation tank which are installed in a shell and are communicated in sequence. The aerobiotic tank is provided with an aerator pipe and a first airlift mechanism; the first airlift mechanism comprises a first air inlet and a first lifting pipe; an inlet of the first lifting pipe extends to a medium-lower part of the aerobiotic tank; the first an outlet of the first lifting pipe is communicated with the anoxic tank; the first airlift inlet pipe is communicated with the first lifting pipe; both the aerator pipe and the first air inlet pipe are connected to a draught fan; and a meshy deoxidization frame matching with a cross section of the aerobiotic tank is disposed in the aerobiotic tank and above a water inlet of the aerobiotic tank. The first airlift mechanism, a second airlift mechanism and the aerator pipe are sent air by the same draught fan, thereby reducing components in the device, reducing cost of the device, simplifying the structure of the device and facilitating maintenance of the device. A liquid and sludge are refluxed in an airlift manner, so that energy consumption of the device can be reduced and operation cost is reduced.

The invention relates to epoxy cured polyester resin used for a powdery paint having high surface decorative performance and high water resistance and a preparation method thereof. The provided polyester resin has appropriate glass-transition temperature, a prepared powdery paint film has excellent dynamic mechanical properties, high surface decoration performance and high water resistance. The polyester resin is prepared by melt phase polycondensation of the raw materials of polyol, polyprotic acid, an acidulate agent, an esterification catalyst, an anti-oxidant and a curing accelerator. The method of the polyester resin comprises the following steps: 1) the polyol is delivered into a reaction kettle at a needed ratio, rapid heating esterification is carried out, water is generated, and is removed via distillation; 2) temperature is increased gradually, and an obtained material is maintained to be clear; 3) sample examination is carried out; 4) negative pressure polycondensation is carried out; and 5) cooling is carried out, the antioxidant and the curing accelerator are added, stirring dispersing is carried out, and an obtained product is cooled, and is collected.

The invention discloses a method for preparing sodium ion battery positive electrode materials with different crystal forms through lithium doping regulation and control. The chemical formula of the positive electrode materials is Na<0.7>Ni<x> Fe<y>Mn<1-x-y-z>Li O<2>, wherein x + y is more than 0 and less than or equal to 0.4, z is more than 0 and less than or equal to 0.4. The obtained material is a P2 phase material, a P2 / O3 mixed phase material or an O3 phase material by regulating the value of z, namely regulating the doping amount of Li. According to the invention, lithium is doped in a transition metal layer, so that a Na-O-Li structure can be formed to activate the oxidation-reduction reaction of oxygen, thereby providing additional capacity. The structure of the sodium-ion battery positive electrode material can be regulated and controlled by changing the lithium doping ratio, so that P2 phase, O3 phase and P2 / O3 mixed phase materials are obtained. The adopted co-precipitation method is simple and easy to implement, a material with regular morphology and uniform size can be obtained, and the obtained material has good electrochemical performance within the voltage range of 1.5-4.5 V.

The invention provides an application of lactobacillus plantarum powder in regulating fat metabolism and intestinal flora of fat rats. The lactobacillus plantarum powder can reduce the in-vivo fat content, increased under induction of high-fat diet, of rats and reduce the body fat rate; the FFA content, increased under induction of high-fat diet, in serum of rats can be remarkably reduced; meanwhile, the TG content in the serum of obese rats can be reduced, and the HDL-C content is increased; the lipid metabolism function of the livers of the obese rats can be improved, and activation of a fatty acid synthesis pathway of the obese rats is inhibited; the condition of intestinal flora disorder of the obese rats can be improved, and the flora richness, flora diversity, flora structure and composition of the obese rats can be maintained; increase of relative abundance of firmicutes is inhibited; the relative abundance of bacteroides is improved; the relative abundance ratio of the firmicutes to the bacteroides in intestinal tracts of rats under the condition of high fat diet is reduced; and the similarity of intestinal flora of the obese rats and healthy rats is increased.

The invention discloses a sulfur-nitrogen co-doped graphene loaded nano-silicon three-dimensional electrode material and a preparation method thereof. The electrode material comprises graphene doped with sulfur atoms and nitrogen atoms, graphene is of a complex three-dimensional network structure, and nano-silicon is distributed between graphene sheet layers; the preparation method comprises the following steps: (1) selecting raw materials; (2) mixing; (3) performing hydrothermal synthesis; (4) performing naturally cooling; and (5) removing impurities and drying. The preparation method has thebeneficial effects that the electrode material provided by the invention is good in cycling stability and excellent in conductivity; in the lithium intercalation-deintercalation process, the initialenergy density of the electrode is improved, and the initial cycle coulombic efficiency, the cycle performance and the rate capability are relatively high; the preparation method disclosed by the invention is simple, and meanwhile, the complexity of an electrode plate manufacturing process is reduced due to the design of a three-dimensional structure.

The invention belongs to the field of aquaculture and particularly discloses an ocean fishing wild swimming crab sand pit fattening breeding method. The method includes the steps that a temporary rearing pond is prepared; sand is laid in the temporary rearing pond and water is injected into the temporary rearing pond; crab varieties are selected; feeding is conducted twice a day, wherein the death rate and the disability rate can be reduced by selecting female crabs captured from a sea area crab cage, and the female crabs obtained after molting and mating can achieve high-density rearing; air which is introduced in a dispersed mode increases the dissolved oxygen content so as to satisfy the aerobic characteristic of wild swimming crabs and enhances the sea water turbulence degree to inhibit water quality deterioration; a circulating water pipeline accelerates sea water update and flowing, inhibits water quality deterioration and promotes air dispersion; a water filter can effectively remove pollutants like organic matter in seawater, pathogenic organisms like bacteria are killed, and diseases are reduced; residual bait and injured and diseased crabs in the temporary rearing pond are picked after two times of drainage every day, and water quality deterioration and disease spreading are inhibited. In a word, the disease rate and death rate of the swimming crabs are reduced, fattening growth and quality of the wild swimming crabs are promoted, and economic benefits are improved.

The invention discloses a radiator for a light-emitting diode (LED) lamp. The radiator comprises a heat dissipation base plate, small fins, large fins, a dustproof cover, air flow channels and window holes, wherein the large fins are longitudinally distributed on the heat dissipation base plate at intervals; the space between every two large fins is provided with an air flow channel; the dustproof cover is arranged above the large fins and is 5 to 10mm away from the tops of the large fins; a plurality of small fins and window holes are formed in each large fin at intervals; acute angles or right angles are formed between the small fins and the large fins in the vertical direction; distances among each row of small fins and distances among each row of window holes are 2 to 10mm from top to bottom; and the dustproof cover is connected with the heat dissipation base plate. By the radiator, the heat dissipation area is increased, the fluidity of air around the radiator in the longitudinal and horizontal directions is enhanced, and a heat exchange coefficient between a heat dissipation surface and the air is improved; and the radiator integrates a heat dissipation function, a dustproof function and a waterproof function and meets the requirement of secondary packaging of high-power LED lamps.

The invention discloses an activation technology of carbon fiber, and relates to the field of fiber treatment. The activating technology comprises the following steps of (1) surface cleaning of the carbon fiber; (2) ultrasonic treatment of surface; (3) activating pretreatment; (4) preparation of a polymer solution; (5) impregnating treatment; (6) surface activation of the carbon fiber. The activation technology has the advantages that after the surface of the carbon fiber is treated by the purifying and ultrasonic treatment, the organic matters are introduced to the surface of the carbon fiber, the bonding property of the organic matters at the surface of the carbon fiber is strong, the activated carbon fiber has good polarity, and the compatibility is excellent; the application prospect is broad.

The invention discloses a preparation method of an asphalt-based carbon microsphere and an application of the asphalt-based carbon microsphere as a sodium ion battery electrode material, and relates to the field of sodium ion battery electrode materials. The preparation method comprises the following steps: mixing asphalt powder and a surfactant, then adding the mixture into high-temperature silicone oil, carrying out heating and keeping the temperature in an air atmosphere, simultaneously melting the mixture into spheres and carrying out surface oxidation to obtain asphalt microspheres with regular appearance and a non-melting property, then separating the asphalt microspheres from an emulsion system, washing and drying the asphalt microspheres, and finally carbonizing the asphalt microspheres at 800-1600 DEG C to obtain a final product. The electrode material shows a discharge specific capacity of 250-450 mAh*g<-1> at a current density of 50 mA*g<-1>, still has a capacity of 140-250mAh*g<-1> after circulation for 100 cycles at a current density of 1 A*g<-1>, and has a high discharge specific capacity and good cycle stability.

The invention relates to the field of lithium battery manufacturing, and particularly provides a lithium battery electrode slurry stirring processing method and lithium battery electrode slurry obtained by processing. The lithium battery electrode slurry stirring processing method comprises the following steps of (a) performing premixing: mixing a solvent and a bonder uniformly to obtain a first mixture, and mixing active substances and a conductive agent uniformly to obtain a second mixture; (b) performing primary stirring: mixing and stirring part of the first mixture and all of the second mixture to obtain a third mixture; (c) performing secondary stirring: mixing and stirring the rest of the first mixture and all of the third mixture; (d) performing third mixing; (e) performing fourthstirring; (f) performing fifth stirring; and circulating the steps (d)-(f). According to the processing method, the uniformity and stability of the electrode slurry in lithium battery production can be remarkably improved, and the uniformity of the next coating process can be improved, so that the controllability of the lithium ion battery production process and the consistency of product performance are improved.

The invention discloses a display panel and a display device, and relates to the technical field of display. The display panel comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer arranged between the first substrate and the second substrate, and a first electrode layer and a second electrode layer which are arranged between the first substrate and the second substrate, wherein the first electrode layer and the second electrode layer are oppositely arranged; the first electrode layer comprises a plurality of first electrodes, and each first electrode comprises a plurality of first hollow portions; the first hollow portions on the first electrodes are arranged irregularly, and the first hollow portions are of a closed structure and / or an open structure. When the external voltage effect is applied, an irregular electric field is formed among the first electrode of the irregular structure and the second electrodes opposite to the first electrodes, when voltages are different, irregular electric fields of different intensities can be formed, the liquid crystal states of different complexities can be obtained, and therefore the displaypanel and the display device achieve more gray-level display.

The invention relates to the technical field of green energy, in particular to a preparation technology applicable to a hydrogen evolution cathode catalyst-oxygen-doped spherical molybdenum disulfidematerial. The synthesis process of the catalyst is simple, the safety is high, the cost is low, a large amount of oxygen-doped spherical molybdenum disulfide can be quickly synthesized, more marginalactive sites are provided, and the hydrogen evolution catalytic activity is improved. The technology comprises the steps of (1) dissolving sodium molybdate, thiourea and silicon dioxide in water; (2)transferring the mixed liquid to a reaction kettle, carrying out magnetic stirring treatment to form a uniform solution, and carrying out a hydrothermal reaction on the solution in the sealed reactionkettle; (3) separately treating a sample after hydrothermal treatment with hydrofluoric acid and sodium hydroxide, washing obtained products with deionized water and absolute ethyl alcohol several times, and drying the products overnight to obtain molybdenum disulfide with different structures.

The invention provides a polymer electrolyte membrane for lithium ion batteries. The polymer electrolyte membrane adopts low-polyether-grafted polyphosphazene polymer as the base material and comprises appropriate amount of lithium salt and doping type small-size inorganic filler introduced to the low-polyether-grafted polyphosphazene polymer. The invention further provides a method for preparing the polymer electrolyte membrane. The method comprises the following steps: dissolving the poly[bis2-(2-(2-methoxyethoxy)ethoxy)ethoxyphosphazene] (MEEEP) into a solvent to prepare a base material solution with the mass percent concentration being 2-15%, dispersing the inorganic filler doped with the lithium salt and a fast ion conductor into the base material solution to obtain the dispersed solution, pouring the dispersed solution on the membrane to form a membrane in a curtain coating manner, and performing vacuum drying to obtain the MEEEP electrolyte membrane. With adoption of the method for preparing the MEEEP electrolyte membrane, the lithium-ion conductivity and the lithium-ion transference number of the MEEEP electrolyte membrane are improved, and the electrochemistry and safety performance of the lithium ion batteries are improved.

The invention discloses application of chitosan oligosaccharide as regulating agent for regulating animal intestinal flora disturbance, the chitosan oligosaccharide, a mixture containing the chitosanoligosaccharide and corresponding application. The polymerization degree of the chitosan oligosaccharide is 2 to 20, so that the intestinal flora disturbance caused by obesity or diabetes or an unreasonable diet structure can be regulated, growth of beneficial bacteria such as Akkermansia, Bifidobacterium and Lactobacillus of an intestinal tract is promoted, and proliferation of harmful bacteriasuch as Desulfovibrio and Helicobacter is obviously inhibited. The invention provides an application method of a clinically-acceptable medicinal preparation or health-care food which is made by usingthe chitosan oligosaccharide alone or a composition prepared from the chitosan oligosaccharide and the beneficial bacteria according to a conventional process. By utilizing the chitosan oligosaccharide, prevention and control of the intestinal disturbance caused by the diabetes, the obesity and the inflammatory bowel disease have an active application value.

The invention relates to the technical field of silencers, and particularly provides a silencer which is better in noise elimination effect. The silencer comprises a silencer main body, an air inlet pipe, an exhaust pipe and a strip outer cover, wherein the silencer main body is accommodated in at least part of the strip outer cover; the strip outer cover and the silencer main body are fixed through screws; the air inlet direction of the air inlet pipe is perpendicular to the exhaust direction of the exhaust pipe; an exhaust port is formed on the strip outer cover; and the exhaust pipe is connected with the exhaust port after being bent. In the silencer, by arranging a shell, a certain silencing and heat insulation effect can be enhanced, and the silencer is more attractive in appearance;the air inlet direction of the air inlet pipe is perpendicular to the exhaust direction of the exhaust pipe, so more collision can be produced during flowing of airflow, and the disorder degree of the airflow is increased to achieve a better silencing effect; and the exhaust pipe is bent, so nearly axial waves in sound waves can be absorbed and reflected at a bending position, and the energy of the nearly axial waves can be transformed into the energy of oblique waves during bending to be easily absorbed.

The invention discloses a coagulation picture shooting device which comprises a stirrer, a reaction container and a lifting platform which are sequentially arranged from top to bottom, a high-speed camera is arranged on one side of a transparent container, and a plane light source is arranged on the other side of the reaction container; and the industrial high-speed camera is mounted on the bracket. The device is used for shooting a coagulation picture of a water sample added with a coagulant. The invention further discloses a coagulation picture shooting method and a dosing method for controlling flocculation through machine learning. According to the dosing method, flocculation images of different water qualities are classified and identified, and a function relationship between the water quality and the dosing amount of the flocculating agent is established, so that accurate dosing of the flocculating agent is realized.

The invention discloses modified carbon fiber. The modified carbon fiber is characterized by being prepared through firstly treating carbon fiber by a Soxhlet extractor steam molecule pretreatment method, and then carrying out electrophoretic deposition of chitosan to modify the carbon fiber, wherein the steam molecules are acetone and concentrated nitric acid. (1) A novel pretreatment method, namely the Soxhlet extractor steam molecule pretreatment method is proposed, and compared with a traditional solvent soaking treatment method, the novel pretreatment method has the advantages that the damage to the bulk property of CF is reduced and uniform and effective cleaning and oxidation treatment can be carried out on the surface of the CF. (2) In the electrophoretic deposition process, the CFis modified by positively charged chitosan molecules, so that the chemical activity of the surface of the CF and the disorder degree of a graphite layer are improved, the surface roughness is improved, the interface compatibility and associativity of the CF and PA6 are improved and the moisture and heat resistance and the mechanical properties of the CF / PA6 composite materials are improved.

The invention relates to the technical field of heat exchange copper tubes and particularly discloses a heat exchange copper tube provided with straight internal threads. The heat exchange copper tube provided with the straight internal threads comprises a copper tube body. A plurality of right-angled teeth are arranged on the inner side of the copper tube body in the circumferential direction. The two side edges of each right-angled tooth are a supporting straight edge and an expanding bevel edge intersecting with the supporting straight edge, wherein the extension line of the supporting straight edge passes through the center of the circle of the copper tube, the supporting straight edge is connected with the expanding bevel edge in a circular arc transmission on the top of the right-angled tooth. The addendum angle of each right-angled tooth is 45 degrees. The right-angled teeth are stretched along the axis of the copper tube to form straight racks. A straight tooth groove is formed between every two adjacent straight racks. A spiral guide groove penetrating the straight racks is formed in the copper tube body. The spiral guide groove extends from one end of the copper tube body to the other end of the copper tube body. A turbulence tooth group is further arranged on the inner side of the copper tube body, and the turbulence tooth group and the spiral guide groove extend in a double-helix shape. The turbulence tooth group comprises a plurality of turbulence tooth teeth located in the straight tooth grooves. By the adoption of the heat exchange copper tube provided with the straight internal threads, tooth patterns can be prevented from being damaged in the tube expanding process, the flowing resistance is reduced, the flowing turbulence degree is increased, the heat exchange efficiency is improved, and the heat exchange copper tube provided with the straight internal threads is convenient to machine.

The invention belongs to the technical field of filter equipment performance tests and especially relates to an experimental device for testing performance of a microfluid inertia impact filter. The experimental device comprises an air source, an aerosol generator, a microfluid inertia impact filter and an air filter which are sequentially connected, wherein an instrument is utilized to collect the aerosol concentration, the pressure and the temperature at an inlet / outlet of the aerosol generator and the differential pressure at an inlet / outlet of the microfluid inertia impact filter; the aerosol generator comprises an upper barrel body and a lower barrel body, the upper part and the lower part of the lower barrel body are respectively a cylinder and a reversed cone, an air flow inlet is arranged at the bottom of the reversed cone, a flow dividing pore plate is arranged at the top of the reversed cone, and a powder fluidizing plate is arranged at the top of the cylinder; an air flow outlet is arranged at the top of the upper barrel body, a vibrating motor and a powder storage pipe are respectively fixed to an outer wall of the upper barrel body, the bottom of the powder storage pipe is communicated with the middle part of an inclined feeding section and is communicated with the upper barrel body through the bottom of the inclined feeding section, and the top of the inclined feeding section is communicated with the upper part of the lower barrel body through a pipeline.

The invention discloses a scale bionic fuel cell bipolar plate and a fuel cell, the fuel cell bipolar plate comprises a bipolar plate body, the bipolar plate body is internally provided with a cavity,one end of the bipolar plate body is provided with a gas inlet, the other end of the bipolar plate body is provided with a gas outlet, and the bipolar plate body is internally provided with a plurality of rhombic rib structures; the rhombus rib structures and the cavity form a net-shaped flow channel, and the gas branch inlet and the gas branch outlet are communicated through the net-shaped flowchannel; and every two adjacent rows of rhombus rib structures are arranged in a staggered mode. The obtuse angle of the rhombic rib structures is set as a circular bead, and the meshy air inlet flowchannel with scaly distribution is arranged, so that the turbulence degree of the gas in the flowing process is enhanced, and the reaction gas can more effectively reach the membrane electrode throughthe diffusion layer; namely, under the condition of the same output power density, the net output of the flow field is higher, so that the reaction gas can reach the membrane electrode more effectively through the diffusion layer, and under the condition of the same output power density, the net output of the flow field is higher.

A probe for electrical test comprises a plate-shaped main portion having a base end to be attached to a support board and a tip end opposite the base end, and a probe tip portion arranged at the tip end of the main portion and having a probe tip to contact an electrode of a device under test, the main portion being made of a tenacity material. The main portion includes a conductive material extending from the base end to the tip end and at least part of which is buried within the tenacity material, and the tenacity material has higher resiliency than that of the conductive material while the conductive material has higher conductivity than that of the tenacity material. As a result, disorder of a signal provided via the probe is decreased without losing elastic deformation.

The invention discloses a venturi flow meter. The venturi flow meter comprises a shell, a venturi tube and a premixing assembly. According to the venturi flow meter, the premixing assembly is added, gas enters a premixing shell of the premixing assembly with the large sectional area from an EGR pipeline. Gas flow area increases, gas pressure rapidly reduces, a pulse peak value of the airflow pressure is reduced, and a gentle pulse is formed, so that a measurement error caused by an overrange is avoided; as the gas flow is increased, the airflow disturbance degree aggravates ands the volume ofgas in the premixing shell is increased; a movable plate can move towards the direction close to an inner prismatic surface of the premixing shell and thus the sectional area of the premixing shell can be adjusted in real time according to the gas pressure to enlarge the volume of the premixing shell and increase the circulation area of gas in real time, so that gas of different flows can be reorganized, and the purposes of reducing the pulse peak value of gas flow pressure, forming gentle pulses and avoiding measurement errors caused by overrange are achieved.

The embodiment of the invention discloses a cryogenic-liquid forced cooling cable structure, and the structure comprises a conductor (1), a plurality of supports (2) and a thermal insulation tube (3),wherein the conductor (1), the plurality of supports (2) and the thermal insulation tube (3) are sequentially from the inside to the outside. The conductor (1) is a hollow metal tube, and a side wallof the metal tube is provided with through holes (12) at intervals. The interior of the conductor forms a cryogenic-liquid channel (11), and the supports (2) are each of a hollow-out structure formedby the processing of a non-metal material, and sleeve the conductor (1) at certain intervals. The thermal insulation tube (3) is a high-vacuum thermal insulation tube, and the conductor (1) is disposed in the thermal insulation tube (3) in a coaxially sleeved manner through the supports (2). According to the embodiment of the invention, the structure can improve the thermal conduction efficiencyand avoid the skin effect during the transmission of a large current.

The invention discloses a centrifugal grinding device for obtaining survival single cells. The centrifugal grinding device comprises a centrifugal unit and a vibration grinding unit; the vibration grinding unit is rotationally arranged on the centrifugal unit and comprises a rotating disc; a plurality of sliding grooves are formed in the lower surface of the rotating disc; vibration mechanisms are embedded in the sliding grooves in a sliding mode; the end, close to the circle center of the rotating disc, of any vibration mechanism abuts against the outer side wall of a driving disc, and the circle center of the lower surface of the driving disc is in driving connection with a first driver; and the lower surface of the rotating disc is further provided with return mechanisms which push the vibration mechanisms to abut against and make contact with the driving disc all the time. In the grinding vibration treatment process, space motion formed by combining horizontal reciprocating linear motion, vertical reciprocating linear motion and horizontal rotating motion can be provided at the same time, so that the tissue grinding vibration environment disorder degree is high, the grinding efficiency is high, and the tissue refining period is short.

The invention belongs to the technical field of roller conveying equipment, and particularly relates to a high-temperature conveying roller assembly for ceramic part production. The high-temperature conveying roller assembly comprises a roller, a rotating shaft, a spiral blade, a supporting disc, a rotating water passing disc, a heat dissipation box, a gear ring, a first gear, a second gear, a third gear and a supporting frame. The first gear is driven by the rotating shaft to rotate, then the gear ring is driven by the second gear to rotate, and then the roller is driven to rotate; meanwhile, the rotating shaft drives the spiral blade to rotate, so that water in the roller and the heat dissipation box automatically circulates in the process that the rotating shaft drives the roller to rotate, the roller is cooled, bending deformation caused by too high local heating of the roller is avoided, and the conveying reliability of the roller is improved; and meanwhile, part of heat is transferred to the roller in the conveying process of the ceramic parts, and the temperature of high-temperature ceramic parts can be continuously transferred to the roller due to the fact that the roller can be cooled in a self-circulation mode in the rotating process, so that reduction of the temperature of the ceramic parts is accelerated.

The invention provides a cement stirring machine for municipal construction. The cement stirring machine for municipal construction comprises a stirring kettle body; a top cover is arranged at the upper end of the stirring kettle body; a heterodromous stirring assembly is arranged in an inner cavity of the stirring kettle body; the heterodromous stirring assembly comprises an upper stirring shaftand a lower stirring shaft which are arranged up and down; a rotating shell is arranged between the upper stirring shaft and the lower stirring shaft; the rotating shell adopts a hollow cylindrical structure; the lower end of the upper stirring shaft passes through the upper end of the rotating shell and is connected with an upper conical gear; the upper end of the lower stirring shaft passes through the lower end of the rotating shell and is connected with a lower conical gear; at least two side conical gears are distributed between the upper conical gear and the lower conical gear uniformlyalong a circumferential direction; and side stirring shafts are arranged on the middle parts of the outer side of the side conical gears. The cement stirring machine for municipal construction has thefollowing advantages: the rotating directions of the upper stirring shaft and the lower stirring shaft are opposite, the side stirring shafts perform autorotation when the rotating speed of the upperstirring shaft and the rotating speed of the lower stirring shaft are the same, and the side stirring shafts rotate around the central axis of the stirring kettle body while performing autorotation when the rotating speed of the upper stirring shaft and the rotating speed of the lower stirring shaft are different, so the stirring efficiency is improved.

The invention discloses a multi-layer screen mesh structure. The multi-layer screen mesh structure comprises a plurality of screen meshes nested together, the screen meshes can rotate freely, the screen mesh located on the innermost layer is arranged on supports through a main shaft, and can rotate in the circumferential direction relative to the main shaft, the screen meshes rotate in a reciprocating mode, the rotating angles of the screen meshes in the two directions are acute angles, when one of the screen meshes rotates towards one direction, the rotation between the two adjacent screen meshes is delayed, a speed difference is formed between the two adjacent screen meshes, and a plurality of driving units in one-to-one correspondence with all the screen meshes are arranged on the supports. According to the multi-layer screen mesh structure, multi-layer screening is achieved through the multiple layers of screen meshes of different specifications, independent rotation between the two adjacent screen meshes is used for achieving delay and speed difference of the two adjacent screen meshes and delay and speed difference of the screen meshes in the two displacement directions, so that relative movement is formed among the plurality of screen meshes, and the screening effect is improved.

The invention discloses a demisting method and a demisting device based on a rotary screen drum. The demisting device comprises a screen drum demisting system at the top of a desulfurizing tower and an automatic rotation control system for controlling the rotation speed of a screen drum demister. Flue gas flow is entrained and sucked into the screen drum demister by the rotating screen drum demister, and the demisting and dedusting efficiency of the flue gas is effectively improved under the dual effects of inertia separation and centrifugal separation. When the operation condition of the desulfurization system changes, the rotating speed of the worm gear mechanism is adjusted to adjust the rotating angle of the screen drum demister to adapt to different smoke flowing conditions. And the screen drum demister is flushed through the annular flushing water demisting system and the scraper. The device combines inertia separation, centrifugal separation and coagulation dust removal, adopts a worm gear mechanism to realize surface cleaning of the screen drum under all working conditions, has the characteristics of high demisting and dust removal efficiency, small flue gas flow resistance, small flushing water amount, no dead angle, low energy consumption, wide working condition adaptability and the like, and can effectively reduce the formation of gypsum rain.