60results about How to "Does not affect emissions" patented technology

The invention relates to an engine exhaust gas particulate filter in a hybrid electric vehicle. In a powertrain that includes an engine having a filter for removing particulate matter from engine exhaust gas, and an electric machine driveably connected to the engine, a method for controlling temperature of the filter including operating the engine to produce a magnitude of positive crankshaft power for driving the vehicle, increasing the temperature of the engine exhaust gas by operating the electric machine to increase load on the engine, and regenerating the particulate filter by passing engine exhaust gas at the increased temperature through the particulate filter.

The invention discloses a preparation method of a three-way catalyst with a high CO purification capability and the catalyst of the preparation method. The preparation method comprises the following steps: Preparing a cerium zirconium aluminum based composite catalytic material by adopting an improved precipitation method, preparing a first coating and preparing a second coating, wherein the firstcoating is prepared from a cerium zirconium aluminum based material, a cerium zirconium based material, aluminum oxide and metallic palladium and the second coating is prepared from the cerium zirconium aluminum based material, the cerium zirconium based material, an aluminum oxide material, rhodium nitrate and palladium nitrate. According to the preparation method, a cerium zirconium aluminum based component is introduced into the aluminum oxide material to obtain the cerium zirconium aluminum based composite catalytic material; the cerium zirconium aluminum based composite catalytic material is matched with traditional cerium zirconium based material and aluminum oxide material, so that the capability of purifying CO through a traditional three-way catalyst can be improved; meanwhile, HC and NOx purification capabilities can be kept very well and an excellent CO emission reduction effect is realized in WLTC emission of a whole vehicle.

The invention discloses dry granular glaze glue, a dry granular glaze, a dry granular glazed tile and a preparation method thereof. The emphasis is to optimize the composition of the dry granular glaze glue, the composition of the dry granular glaze and the surface tension of the dry granular glaze glue, so that the prepared dry granular glaze glue has preferable suspension property, dispersibility and caking property, and then the prepared dry granular glaze has the characteristics of no sedimentation, no agglomeration, dispersion uniformity, high bonding force and the like; moreover, the drygranular glaze is high in adaptability with ink-jet printing ink, and the dry granular glaze has the advantages of no repulsion, short dry time, high air permeability and the like; a ceramic tile prepared from the dry granular glaze is uniform in surface dry granular distribution and dispersion and warm, fine and smooth in finger touch, dry granular flicker shines under lamplight irradiation, andthe ceramic has a unique decoration effect; the surface of the brick product has the defects of no leakage dry granule, no pinhole, glaze bubble, glaze explosion and the like, decorative patterns areclear, well-bedded and pure in color development, particularly, the dry granular distribution and dispersion on the surface of a dark color printing product is uniform, the color development is colorful, and the product is high in pollution resistance, hardness and abrasive resistance.

The invention discloses a heat dissipation device for a new energy automobile battery. The invention belongs to the technical field of new-energy vehicles. The device comprises an installation net box, a box cover, a first heat dissipation assembly, a second heat dissipation assembly, a wiping assembly, a ventilation heat dissipation assembly, a ventilation assembly and a drainage assembly. The box cover is arranged at the top of the installation net box. The first heat dissipation assembly is arranged at the bottom of the installation net box. The second heat dissipation assembly is arrangedon the side wall of the installation net box and is in sliding fit with the side wall of the installation net box. The wiping assembly is arranged in the installation net box. The ventilation heat dissipation assembly is arranged on the side wall of the installation net box. The ventilation assembly is arranged on the side wall, symmetrical to the ventilation heat dissipation assembly, of the installation net box. The drainage assembly is arranged at the bottom of the installation net box. A plurality of semiconductor chilling plates work on an installation net plate to generate cold air, andthree first heat dissipation fans work to convey the cold air to the bottom of the battery to conduct heat dissipation operation on the battery.

The present invention relates to a high temperature flue gas temperature control system of the flue gas desulphurization engineering, the FGD-HFGTC system for short, comprising a water spray device and a control device arranged in the flue which is behind the bypassing baffle of a desulphurization island, the water spray device consists of a water supply pipe, an electrically operated valve, a water nozzle, a spraying sewage rising pipe and a rising pipe electrically operated valve; the control device is a programmable controller PLC or a distributed control system DCS or other controllers. The method of controlling the temperature of the flue gas is as follows: when the temperature of the flue gas is higher than the set point of the safe temperature which is endured by the antiseptic layer, the FGD-HFGTC system receives an external signal( the instruction of the desulphurization island control system or the main frame control system), the system is automatically put into operation, the control device instructs the water spray system spraying the low temperature water to the high temperature flue gas in the flue, reducing the temperature of the flue gas, protecting the antiseptic layer which is arranged in the internal wall of the chimney; when the external signal is disappeared, the FGD-HFGTC system comes into a standby state. The FGD-HFGTC system is also capable of protecting the antiseptic layer arranged in the flue which is behind the bypassing baffle of a desulphurization island at the same time.

The invention discloses an air cylinder achieving gasoline engine compression ratio continuous variation and a work method of the air cylinder achieving gasoline engine compression ratio continuous variation. The air cylinder achieving gasoline engine compression ratio continuous variation comprises a first cavity and a control system. The first cavity is defined by an air cylinder cover, an air cylinder cushion and an air cylinder sleeve. A first piston is arranged in the first cavity. The upper portion of the cavity wall on one side of the first cavity is provided with a compression ratio adjusting mechanism. The compression ratio adjusting mechanism comprises a second cavity, a connection pipe enabling the first cavity and the second cavity to communicate, a second piston arranged in the second cavity and an executing mechanism which is connected with the second piston and capable of driving the second piston to move back and forth in the second cavity. The air cylinder cover is provided with an oil sprayer, a sparking plug and a knock sensor used for detecting knock of the air cylinder. The control system is connected with the knock sensor and the executing mechanism to form a closed-loop control system. The air cylinder can adjust the compression ratio of a gasoline engine according to use working conditions, a large compression ratio is adopted when the load is small, a small compression ratio is adopted when the load is large, knock is avoided, the thermal efficiency of the gasoline engine is improved, and therefore the purpose of saving oil is achieved.

The invention discloses a sintering desulfurization and white smoke removal system and a technological process of the sintering desulfurization and white smoke removal system, which can be used for mainly solving the problems that a method for treating 'white smoke' is high in energy consumption, cannot achieve energy conservation and emission reduction, and the like in the prior art. The sintering desulfurization and white smoke removal system comprises a desulfurization tower (3) and a smoke discharging chimney (1) arranged at the top of the desulfurization tower (3). The sintering desulfurization and white smoke removal system is characterized by also comprising a dehumidifying system connected with the smoke discharging chimney (1), wherein a flap valve (2) used for switching a communicating state of the smoke discharging chimney (1) and the dehumidifying system is also installed on the smoke discharging chimney (1) and positioned above the joint of the smoke discharging chimney (1) and the dehumidifying system. According to the sintering desulfurization and white smoke removal system and the technological process, the desulfurization treatment is firstly carried out, then three-step gradually strengthened dehydration treatment is carried out, and finally cooling treatment is carried out, so that flue gas can be effectively dehumidified, and the energy consumption of the sintering desulfurization and white smoke removal system is greatly reduced due to the technology of firstly dehydrating and then cooling.

The invention discloses a zero-emission treatment system for desulfurization wastewater from thermal power plants. The zero-emission treatment system comprises an air pre-heater, a dust remover, a desulfurization absorption tower, an alkaline substance supply device, a chlorine ion concentration detector, a controller and a desulfurization wastewater recycling device. The air pre-heater, the dustremover and the desulfurization absorption tower are arranged between a boiler and a chimney, the alkaline substance supply device is arranged between the air pre-heater and the dust remover in a communicated manner and comprises a dry powder storage tank, a weighing machine, a fan and a powder spray nozzle, and the powder spray nozzle extends into a flue gas pipeline between the air pre-heater and the dust remover; the chlorine ion concentration detector is arranged at a flue gas outlet end of the air pre-heater; the controller is connected with the chlorine ion concentration detector and theweighing machine; the desulfurization wastewater recycling device comprises a wastewater neutralization basin, a sedimentation basin, a flocculation basin, a clarification basin, an RO (reverse osmosis) machine and an evaporator, and a low-salinity water outlet of the RO machine is communicated with the desulfurization absorption tower. The zero-emission treatment system has the advantages that the content of chlorine ions which are fed into the desulfurization absorption tower can be reduced to a great extent, and accordingly the emission of the desulfurization wastewater can be obviously reduced; the desulfurization wastewater is free of emission.

The invention discloses an induction urinary catheterization traction tube device which has no impact on urination and has effects of intelligently compressing wound surface traumatic cavity after electro-prostatectomy and laser electrotomy and stopping surgical wound bleeding. A balloon on a tube body automatically squeezes a surgical wound of a patient to prevent continuous bleeding of the surgical wound; an intelligent induction device is linked with a traction box and automatically adjusts the electric traction box according to the number of red blood cells in urine and tightens a tractionpull rope to enable an airbag to compress the wound surface to stop bleeding, so that urethra of the patient is supported effectively, the surgical wound is compressed, the urine is drained and discharged, bleeding is stopped effectively, all defects of conventional rubber strip traction including that pressure cannot be quantified and intelligently adjusted and can only be adjusted according toexperience of nurses and doctors and compression bleeding stopping and rubber strip elasticity coefficient cannot by quantified due to inconvenience in movement and tension loss after movement causedby the fact that one ends of rubber strips are tied on feet of patients are avoided, and rehabilitation and health of the patients are benefitted better.

The invention relates to the technical field of gas filtration, in particular to a dust-containing waste gas treatment device of an animal feed production plant. The dust-containing waste gas treatment device of the animal feed production plant comprises a ventilation pipeline and two filtering mechanisms. One end of the ventilation pipeline is an air inlet, the other end of the ventilation pipeline is an air outlet, and dust-containing waste gas is blown from the air inlet to the air outlet. The two filtering mechanisms are symmetrically arranged in the ventilation pipeline and used for filtering dust particles in dust-containing waste gas, and each filtering mechanism comprises a folding filter plate assembly, a clamping assembly, a vibration assembly and a dust removal assembly. When the acting force of dust-containing waste gas on the folding filter plate assembly exceeds a first preset value, the folding filter plate assembly overcomes the limitation of the clamping assembly and starts to be folded. When the acting force of dust-containing waste gas on the folding filter plate assembly is smaller than a second preset value, the folding filter plate assembly resets. When the number of times of reciprocating folding of the two folding filter plate assemblies reaches the preset number of times, the tension of the first tension spring begins to be released, and the two folding filter plate assemblies are made to be straightened. And dust attached to the filtering mechanism is shaken off.

The invention relates to the field of green buildings and discloses an integrated type lighting and water storing green roof comprising a roof body, a skylight, a rainwater recycling mechanism and a greening planting mechanism, wherein the rainwater recycling mechanism and the green planting mechanism are embedded into the roof body. The skylight penetrates through the roof body. A fence is builtat the upper end of the roof body. A waterproof layer and a reinforcing layer are sequentially arranged on the lower surface of the roof body in a fit manner. The rainwater recycling mechanism is formed in the manner that the upper side of a filtering cavity is connected with a water discharging pipe on the upper surface of the roof body in a communicating manner, and the lower side of the filtering cavity communicates with a water tank located in a cavity of a water storing device through a water guide pipe. An arc inner wall with the radius equal to the width of the inner wall of the filtering cavity is embedded into the left wall in the filtering cavity. A flow guide board is rotationally connected to the circle center of the arc line of the arc inner wall through a torsional spring. Afiltering net is embedded into the portion, above the flow guide board, of the inner wall of the filtering cavity. The integrated type lighting and water storing green roof can effectively filter water and store water, water recycling is convenient, lighting is guaranteed, and meanwhile safety and stability are achieved; and besides, the integrated type lighting and water storing green roof can cooperate with greening planting, and better environmental friendliness is achieved.

The invention belongs to the technical field of engines, and particularly relates to a method and detection device for online leak detection of a urea injection system. The method for online leak detection of the urea injection system includes the steps that it is determined that an engine is in a reversed towing running state, the actual pressure value of a urea pump in the urea injection systemis controlled to reach a preset pressure value, the actual supply amount of the urea injection system when the urea pump is at the preset pressure value is calculated, and it is determined that the urea injection system leaks when the actual supply amount does not meet a first preset condition. According to the method for online leak detection of the urea injection system, real-time online detection when the engine is in the reversed towing running state is performed without affecting the normal operation and emission of the engine, and is only implemented by the controller calculation withoutdowntime maintenance, and the detection cost is reduced.

The invention relates to the field of sampling and especially relates to an unloading mechanism for a spiral sampling machine, the spiral sampling machine and a whole-section spiral sampling machine. The unloading mechanism comprises an unloading tube, a U-shaped unloading chute and a driving component for driving the unloading tube to move so as to enable a discharging port of the unloading tube to move up and down in the U-shaped unloading chute, wherein an opening side of the U-shaped unloading chute comprises an upper opening side located above the discharging port and a lower opening side located below the discharging port; a lower roller shutter and a lower reel are also arranged on the opening side of the U-shaped unloading chute; the two ends of the lower roller shutter are respectively connected with the lower end of the discharging port and the lower reel; the lower roller shutter moves up and down along with the discharging port and flexibly moves in the mode of always covering the lower opening side of the U-shaped unloading chute. The spiral sampling machine and the whole-section spiral sampling machine both comprise the unloading mechanism. During an unloading process of the unloading mechanism, an abandoned sample is not leaked and sprayed out.

The invention provides a device system integrating DPF (diesel particulate filter) heat regeneration and mechanical regeneration, comprising an engine, a DPF active regeneration system, and a diesel particulate filter; the DPF active regeneration system is connected with the intake end of the diesel particulate filter through a first exhaust pipe, and the engine system is connected with the intakeend of the diesel particulate filter through a second exhaust pipe, the exhaust end of the diesel particulate filter is connected with a third exhaust pipe, wherein the DPF regeneration system is characterized in that a fuel outlet of a fuel tank is connected with a fuel inlet of a fuel pump through a fuel pipe, a fuel outlet of the fuel pump is connected with a fuel inlet of an oil-level adjusting valve through a fuel pipe, a fuel outlet of the oil-level adjusting valve is connected with a turbine combustor through a fuel pipe, and the turbine combustor is connected with the intake end of the diesel particulate filter through the first exhaust pipe. The device system combining mechanical regeneration and heat regeneration has compact structure, DPF regeneration efficiency can be improved, PDF' service life can be extended, and the cost of the DPF regeneration system is reduced.

The invention discloses a wave blocking device for explosive welding air impact waves. The wave blocking device comprises a semispherical steel container (2) fixed and reinforced by backfill soil, wherein reinforcing rib plates (1) are arranged vertically and transversely on the outer part of the container in a crossed manner; one side of the lower part of the container is connected with a barrel-shaped wave blocking device exiting and entering channel (6) and an exiting and entering door is additionally arranged; a smoke exhausting opening (3) is formed in the top of the container; a water bag (5) for completely covering the smoke exhausting opening is arranged on the smoke exhausting opening by arranging a covering object supporting frame (4). According to the wave blocking device, the water bag at the top of the smoke exhausting opening of an air wave blocking device is additionally arranged to cover, so that an influence range of the air impact waves caused by explosive welding is reduced effectively and the strength of the air impact waves is weakened obviously; the influences on people, buildings and the like in a certain range of the periphery by the explosive welding are controlled in a safe range; meanwhile, the influences of smoke dust and harmful gas, caused by explosion, are reduced by breaking and scattering the water bag under the effect of the impact waves, so that the aim of green and environment-friendly explosive machining is realized.

The invention discloses a large chemical wastewater filtering device with a replaceable filter screen. The large chemical wastewater filtering device comprises a mainstream channel for discharging chemical wastewater, a partition plate, an opening and closing mechanism, a filtering mechanism, and a controller for controlling the opening and closing mechanism and the filtering mechanism to work. The opening and closing mechanism and the filtering mechanism are installed on the mainstream channel and are sequentially distributed in the flowing direction of the wastewater. When the wastewater ispurified by the purifying device, filtering is conducted through two channels; the two channels are in different opening and closing states; when a filtering plate in one channel is taken out to be cleaned, wastewater discharging and filtering of the other channel cannot be affected, and the continuous wastewater purifying is ensured.

The invention provides a splash-proof squatting pan. A transverse column parallel to a water surface is designed below the water surface of an excrement inlet of the squatting pan. When people use the splash-proof squatting pan, excrement firstly falls onto the transverse column, and the excrement cannot splash water due to the intercepting function of the transverse column. Due to the fact that the transverse column only occupies a small part of the area of the excrement inlet, the fact that excrement is discharged into a pipeline cannot be affected. Due to the fact that the transverse column is underwater, and the fact that marks of the excrement cannot be reserved on the transverse column is guaranteed. Sanitation of the splash-proof squatting pan is guaranteed. The splash-proof squatting pan is simple in production process and convenient to popularize.

The invention discloses a waste gas purification pipeline for garbage treatment, including a pipe body, the side wall of the pipe body is fixedly connected with an exhaust pipe; the inner wall of thepipe body is rotationally connected with a circular ring; conical pipes are symmetrically and fixedly connected to the inner wall of the circular ring; each conical pipe is arranged in a hollow circular truncated cone shape; the side wall of each conical pipe is provided with a plurality of exhaust channels evenly distributed in the circumferential direction; liquid absorption cotton is embedded in the upper end of the pipe body; a plurality of capillary holes are formed in the inner wall of the circular ring; a sliding plug cavity is formed in the upper end of the pipe body; the inner wall ofthe sliding plug cavity is in sealed sliding connection with a magnetic sliding plug; and the side wall of the magnetic sliding plug is fixedly connected with the sliding plug cavity through a spring. When airflow flows in the pipe body at a high speed, pressure difference is generated between the two sides of the capillary holes; and then purification liquid in the capillary holes flows out towards the inner wall of the circular ring in a bubble form under the action of pressure difference, so that the contact area of the purification liquid with harmful gas and dust in the waste gas is increased, the purification efficiency of the waste gas is improved, and the consumption of the purification liquid is reduced.

The invention discloses an acoustic wave agglomeration system and an acoustic wave agglomeration method based on a multi-stage reflective focusing acoustic waveguide array structure. The system comprises an air flow sound source, a horn, reflective focusing acoustic waveguide arrays, a smoke dust pipeline and the like, wherein reflective focusing acoustic waveguides form a certain quantity of arrays; the arrays are connected and communicated with the air flow sound source, the horn and a dust-containing smoke pipeline, so that the sound pressure level of the reflective focusing acoustic waveguide arrays and an acoustic wave action chamber reaches a certain intensity level (larger than 155dB); an excited flow is vibrated by suspended particles of the reflective focusing acoustic waveguide arrays and the acoustic wave action chamber to generate a relative speed so as to mutual impact to agglomerate aggregates which are relatively large in particle size or large particles; the suspended large particles are removed by adopting a general dust removal technique so as to realize the aim of controlling emission of PM2.5. The system disclosed by the invention has the advantages of being simple in structure and capable of effectively removing the suspended particles.

The invention discloses a method for recycling an epsilon-caprolactone byproduct. The method comprises the steps: preparing a caprolactone byproduct and micromolecular polyol according to a certain ratio, adding an antioxidant and a catalyst, carrying out a reaction at a temperature of 140 DEG C to 200 DEG C, then, carrying out heat preservation for 1 to 3 hours at a temperature of 205 DEG C to 240 DEG C, adding the catalyst to gradually lower pressure intensity to finally enable an acid number of a system to be not higher than 2.0 mg KOH / g; and subjecting the product to decoloring treatment.The method can be used for solving the problem in recycling of caprolactone oligomers and is an environment-friendly and efficient treatment method.

The invention provides a silicon wafer etching method, a method for preparing an antireflective texture surface on the silicon wafer surface and a method for etching specific patterns on the silicon wafer surface, and belongs to the technical field of semiconductor etching. A solid MnO2 is used as oxidant, HF and other non-oxidizing acid are used for providing an acidic environment for enhancing the oxidizability of the solid MnO2. The solid MnO2 shows oxidation in the acidic environment and contacts the silicon wafer to oxidize the silicon, the generated SiO2 is etched by the HF acid, and the exposed new silicon surface contacts the solid MnO2 for further oxidation. As the reaction proceeds, the etched structure is formed at the position where the silicon wafer contacts the solid MnO2, and the solid MnO2 is finally reduced to the soluble Mn2+ ions. The method can be used for fixed etching at the place of the silicon wafer surface requiring etching and can also be used for preparation of the antireflective texture surface on the surface of polysilicon wafer, and the texture surface with low reflectivity can be obtained without using precious metal or nitric acid.

The invention discloses a production and manufacturing method and application of real leather and regenerated leather floors. The production and manufacturing method comprises the following steps: soaking animal raw leather in saturated salt water for 4-6 hours; taking out the soaked animal raw skin, and directly performing unhairing treatment; carrying out tanning treatment on the unhaired animal raw hide to obtain genuine leather; carrying out vacuum drying on the obtained genuine leather to make leather formed; sanding the formed leather flesh face to reduce large fibers; and hot-pressing the sanded leather on a wooden floor through a PUR hot melt adhesive. The leather replaces a wooden floor and other materials to serve as the surface, the defects of anisotropy, dry shrinkage, wet expansion and easy cracking and deformation of a wood floor are overcome, the sanded leather is hot-pressed on the wooden floor through PUR hot melt adhesive, polyurethane is sprayed to seal the sides, the connectivity between the leather and a floor base material is guaranteed, VOC emission influencing the environment is not generated, and the environmental protection property is good.

The invention belongs to the technical field of sewage filtration and discloses a domestic sewage environmental filtering drain tank. The domestic sewage environmental filtering drain tank comprises avegetable basin, a link pipe, a filter cake, a sealing cover, an overflow pipeline, a first sewage pipeline, a lift cage and a second sewage pipeline. Through an overflow opening provided with a filter screen, water in the vegetable basin can be prevented from overflowing out of the vegetable basin, and residue in the vegetable basin can be prevented from flowing into the overflow pipeline through the overflow opening so as to avoid the sewer from being clogged. With the filter cake disposed in a circular hole and through rubber sealing, the filter cake can be taken and residue is convenientto clean. Through the arrangement of the lift cage and by putting multiple freely-placed balls in the lift cage, a flexural slit is formed, fine residues can be filtered in the lift cage, and a lift cage hole will not be blocked and discharge of sewage will not be affected. Through the arrangement of a baffle plate, discharge of sewage will not be affected, and pollution caused by sewage backflowalso can be prevented.

The invention relates to the technical field of boiler exhaust valves, and discloses a boiler exhaust valve capable of reducing liquid sloshing by utilizing air elasticity. The boiler exhaust valve comprises a valve body, wherein a drain opening is formed in the top of the valve body, retaining blocks are fixedly connected to the interior of the valve body, a piston is movably connected to the surfaces of the retaining blocks, a blocking ball is fixedly connected to one sides, away from the retaining blocks, of the piston through a piston rod, the surface of the blocking ball is movably connected with a compression mechanism, the lower portion of the blocking ball is movably connected with a clamping mechanism, and the lower portion of the clamping mechanism is slidably connected with an inflow opening. According to the boiler exhaust valve, gas is discharged from an exhaust groove in the compression mechanism, at the same time, the condition of liquid oscillation inside the valve bodyis observed, the contact condition of air holes and the blocking ball is controlled by rotating a rotating rod, and the speed of the exhaust gas is indirectly controlled; after the part of air holesare blocked, the vapor outflow speed is slowed to cause the pressure inside the valve body to become large, and the oscillation liquid causes water molecules inside the valve body to be pressed underthe action of high pressure, so that the effect of eliminating the liquid oscillation is achieved.

The invention relates to the field of municipal energy-saving engineering, in particular to an efficient and energy-saving municipal drainage system. The efficient and energy-saving municipal drainagesystem comprises a road drainage area and a greenbelt drainage area, the road drainage area comprises a drainage port formed in the roadside and a drainage channel formed in the lower portion of a road surface, the greenbelt drainage area comprises an earth surface planting layer and a rainwater collection pool arranged on the lower portion of the earth surface planting layer, the drainage port is connected into the rainwater collection pool, an overflow channel is formed in the side wall of the rainwater collection pool and communicates with the drainage channel, a rainwater drainage mechanism is connected between the earth surface planting layer and the rainwater collection pool, and rainwater in the rainwater collection pool is guided to the earth surface planting layer. According to the system, a municipal drainage system and a garden irrigation system are combined, rainwater drained by municipal administration is used for irrigating and supplementing water to the garden greenbeltfrom bottom to top, rainwater drainage paths and resources consumed by rainwater recycling are reduced, and the purposes of high efficiency and energy conservation are achieved.

The invention provides a car trunk base. The car trunk base comprises a fixing seat, a placing plate and retaining plates and is characterized in that electric lifting columns are arranged on the fixing seat, the placing plate is slidably connected with the fixing seat through the electric lifting columns, the retaining plates are used for limiting the positions of objects in a car trunk to prevent the objects from moving in the car trunk so as to prevent the objects from being damaged due to collision, and the objects can be safely placed in the car trunk; the placing plate is provided with mounting slots, mounting holes are arranged in each mounting slot, rotary shafts are arranged on two end faces of each retaining plate, each retaining plate is rotatably connected with the corresponding mounting slot through the coordination of the corresponding rotary shafts and the corresponding mounting holes, the retaining plates rotate downwardly under the effect of self-weight and are arranged downwardly when the retaining plates are not used, the retaining plates are rotated to allow the retaining plates to be arranged upwardly so as to fix the positions of the objects when the retainingplates are used, a limit plate for limiting the rotation of each retaining plate is arranged on the retaining plate, and each limit plate is rotatably connected with the corresponding retaining plateand can rotate in the corresponding mounting slot along with the retaining plate.

The invention relates to the field of environmental protection, and belongs to the field of preparation of mullite automobile exhaust purification catalyst carriers. Kaolin, alumina powder and mullitecellucotton are used as raw materials, and the automobile exhaust purification catalyst carrier is obtained through ball milling, suction filtration, mixing, 3D modeling, 3D printing, drying and sintering operations. The 3D printing mullite automobile exhaust purification catalyst carrier product is controllable in surface area, good in catalytic effect, high in catalyst carrier strength, high instructural density and high in thermal stability, and satisfies the multi-period alternate cooling and heating use environment of an automobile exhaust pipe.

The invention discloses a method for preparing a polyurethane heat-preserving material from an epsilon-caprolactone by-product. The method comprises the following steps: feeding a caprolactone by-product and micromolecular polyol in a certain proportion, adding an antioxidant and a catalyst, carrying out a reaction at 140 to 200 DEG C, then carrying out heat-preserving at 205 to 240 DEG C for 1 to3 h, adding a catalyst, and gradually reducing a pressure until an acid value of a system is no more than 2.0 mg KOH / g; subjecting a product to decolorizing treatment; and adding a foaming agent, a foam stabilizer, isocyanate and a catalyst into obtained polycaprolactone polyol, and carrying out foaming so as to prepare a polyurethane foam plastic. The polyurethane foam plastic heat-preserving material obtained by using the method provided by the invention has a heat conductivity coefficient of less than 0.10 W / (m.k) and an apparent density of less than 900 kg / m3, and can be used as a heat-preserving material. The method provided by the invention can solve the problems of recovery and utilization of a caprolactone oligomer; meanwhile, a heat-preserving material prepared by using the method provided by the invention can be used for industrial heat-preserving engineering.