58results about How to "Reduce evaporation" patented technology

The utility model discloses a breathing machine humidifying tank and a breathing machine system, and relates to the field of medical instruments. The breathing machine humidifying tank comprises a tank body, a guide sleeve, a telescopic water bag and an operating rod. The tank main body is provided with a highest water line; the telescopic water bag is located in the tank body and horizontally arranged, the top of the telescopic water bag is higher than the highest water line, the telescopic water bag comprises a telescopic sleeve and a hard end plate, one end of the telescopic sleeve is connected with the tank body, the hard end plate is connected with the other end of the telescopic sleeve, and a water suction and drainage hole is formed in the hard end plate and lower than the highest water line. The guide sleeve and the telescopic water bag are arranged in the same direction, and the guide sleeve is connected with the tank body and corresponds to the telescopic water bag in position. And the operating rod penetrates through the guide sleeve, is matched with the guide sleeve and is sealed with the guide sleeve, and the operating rod is connected with the hard end plate. The breathing machine humidifying tank is installed on the breathing machine main machine, and a temperature and humidity sensor and a push-pull structure are arranged in a matched mode to obtain the breathing machine system. According to the utility model, the temperature and humidity of the humidified air at the patient end can be optimal.

The utility model provides an environment-friendly waterproof structure, and relates to the field of building waterproof structures. Two rows of top bolts symmetrically penetrate through the outer eaves of the left side and the right side of the flexible plastic waterproof pad, the flexible plastic waterproof pad is fixed to a roof through the two rows of top bolts, and a plurality of rows of planting grooves are formed in the top end of the flexible plastic waterproof pad at equal intervals; the planting groove is of a rectangular structure, the interior of the planting groove is filled with soil, and green plants and flower plants for greening and environmental protection are planted in the soil; a soil sealing plate is embedded in an opening in the top end of the planting groove in a sealing and covering mode, the whole soil sealing plate is of a U-shaped structure, two L-shaped clamping plates are symmetrically and downwards welded to the top ends of a left side plate and a right side plate of the soil sealing plate, and two soil filtering assemblies can intercept and filter residual and mingled soil in overflowing water through nylon filtering wires evenly and densely distributed on the two soil filtering assemblies; the soil content in the rainwater is further reduced, and the probability that a roof drainage system is blocked and the water and soil loss of soil in the planting groove are further reduced.

The invention discloses a liquid hydrogen production device and a working method thereof.The liquid hydrogen production device comprises a first heat exchanger, a pipe mechanism, a conversion mechanism, a cooling mechanism and a valve bank, a second cooling medium inlet, a first inlet and a first outlet are formed in the first heat exchanger, and the pipe mechanism comprises a first cooling pipe; and the first cooling pipes are connected with the first heat exchanger. The valve set comprises a second throttling valve, the second throttling valve is installed on a first cooling pipe, the first cooling pipe is communicated with a first outlet and a second cooling medium inlet, and circulating hydrogen entering the first heat exchanger from the first inlet exchanges heat with circulating hydrogen cooled and depressurized through the cooling mechanism. And the first cooling medium flows into the first cooling pipe from the first outlet, is throttled by the second throttling valve and enters the first heat exchanger from the second cooling medium inlet. The raw material hydrogen is cooled through the mode that expansion continuous refrigeration of the cooling mechanism cooperates with high-pressure throttling refrigeration, energy is saved, and meanwhile the product hydrogen with the parahydrogen content reaching 97% is produced.

The utility model relates to the technical field of medical instruments, and discloses a disposable bottle-free self-humidifying nasal oxygen cannula which comprises a humidifying material arranged in a humidifying cavity. The pressing plate is slidably connected to the inner side wall of the humidifying cavity, and the pressing plate is arranged on the right side of the humidifying material; one end of the sliding rod is fixedly connected to the right side wall of the pressing plate, and the other end of the sliding rod penetrates through and extends out of the humidifying cavity. When the sliding rod is pulled out, the sliding rod is pushed into the humidifying cavity, the clamping protrusions are pressed to deform and slide into the clamping grooves, at the moment, the sliding rod compresses the humidifying material, the pore volume of the humidifying material is reduced, free water is squeezed back into the humidifying material, surface moisture is reduced, the evaporation capacity is reduced, and the oxygen humidifying degree is reduced; the fiber layer in the humidifying material extends from a compressed state to a fluffy state, the pore volume is increased, free water stored inside migrates to the surface due to the action of gravity and fiber tension, moisture attached to the fiber surface and the surface of the humidifying material is increased, the evaporation capacity is increased when the humidifying material makes contact with oxygen, and the oxygen humidifying degree is increased.

This invention relates to the field of fuse technology and discloses an intelligent electric drop-out fuse, comprising a support assembly, the support assembly including an insulating support, a fixing member fixedly connected to one side of the top of the insulating support, a moving contact piece fixedly connected to the inner side of the top of the fixing member, a solenoid coil electrically connected to the top of the moving contact piece, a fuse tube assembly mounted at the bottom of the moving contact piece, and a self-cleaning assembly fixedly connected to one side of the top of the fuse tube assembly, the self-cleaning assembly including a mounting plate, a slider mounted on the top of the mounting plate, and a scraper fixedly connected to the top of the slider. When the solenoid coil is energized, it generates a magnetic field, eliminating contact welding. The fuse tube assembly releases air, releasing the locking block and allowing the scraper to contact the contact. The self-cleaning mechanism, combined with the drop-out of the fuse tube assembly, prevents the fuse from failing to drop due to welding of the moving contact piece. The angle between the scraper and the top of the slider is between 60-75°, avoiding the problem of the fuse failing to drop due to welding of the moving contact piece.

The utility model discloses an ammonium sulfate drying, spraying and water replenishing system which comprises a belt conveyor, a drying bed main body, a heat exchanger, a cyclone dust collector, a water washing dust collector and an evaporation raw water tank, one end of the heat exchanger is connected into heat source steam, the other end of the heat exchanger is connected into a condensation bolt pipe network, the heat exchanger inputs air through the air blower for heat exchange to form hot air, and the hot air enters the drying bed main body, passes through the cyclone dust collector and then passes through the washing dust collector for secondary dust removal. The system has the beneficial effects that the problems of tail gas dust and smell in the ammonium sulfate drying process can be solved, the problems of dust particles and hot gas drifting in the tail gas are solved, crystals in the tail gas are recycled, and particulate matter pollution caused by direct exhaust of the tail gas is reduced; the problem that other water is introduced is effectively avoided, the evaporation water amount of the system is reduced, and water resource consumption of a large amount of spraying water is avoided.

This invention relates to the field of inverter technology, specifically to an energy storage inverter with adjustable airflow direction. It includes an inverter board and a partition plate disposed at the bottom of the inverter board. A lower air supply channel is reserved between the bottom of the inverter board and the partition plate, and an upper air supply channel is reserved between the top of the inverter board and the equipment inside the mobile power station. The ends of the lower and upper air supply channels are connected. An annular enclosure is provided on the top of the partition plate. In this energy storage inverter with adjustable airflow direction, the lower and upper air supply channels allow the airflow directions to flow in opposite directions. When used outdoors, the angle between the airflow direction and the partition plate is changed by tilting the control device, so that the airflow direction forms a convergence angle with the partition plate surface. When the airflow passes through the lower air supply channel, the internal liquid is intercepted and then enters the upper air supply channel to cool the inverter board, thereby reducing the probability of liquid contacting the inverter board.

The application discloses a multi-modal large model multi-agent collaborative scheduling and distribution method, and relates to the technical field of agent deployment.The steps of the method include: receiving a complex task input by a user, decomposing the complex task into atomic subtasks, and generating a task decomposition graph; establishing an agent capability evaluation model, obtaining the comprehensive capability scores of the agents according to the capability behaviors of the agents in the candidate agent set; using the subtask types and the comprehensive capability scores of the agents to dynamically match and assign roles through a decision function, and generating a candidate agent set; and constructing a task-agent ant colony distribution algorithm according to the task decomposition graph and the comprehensive capability scores of the agents, and solving a distribution scheme.The application solves the problem that the existing multi-agent system lacks a dynamic role adjustment mechanism, cannot flexibly cooperate according to task progress and agent state, and is difficult to meet the requirements of an efficient and flexible task processing requirement of a multi-modal large model application development platform.

The invention relates to the technical field of agricultural irrigation and fertilization, and discloses an intelligent water and fertilizer all-in-one machine based on citrus growth irrigation, which comprises an environment information detection module and a water source barrel, the control cabinet is in communication connection with the environment information detection module; the cloud decision platform is in communication connection with the control cabinet and is used for receiving decision analysis of the environment information detection module and generating a corresponding control instruction; according to the scheme, efficient mixing of water and fertilizer is achieved by means of the Venturi effect of the water ejector, and the water and fertilizer utilization rate is increased; manual work is replaced by multi-sensor and cloud decision, water and fertilizer are prevented from being excessive or insufficient, the yield and quality are protected, and ecology is reduced; the double-filtration water distribution ejector is self-cleaned, the pipe blocking problem is solved, the maintenance cost is reduced, automation is achieved through an STM32 controller and an HMI, and the precise and efficient requirements of modern agriculture are met.

A yeast cell microinjection method and system based on quartz nanoinjection needle belong to the field of microbial single cell operation and microinjection technology. It includes: preparing high rigidity quartz nanoinjection needle and holding needle; biochemical weakening pretreatment is carried out on yeast cells to weaken the cell wall; a microdroplet environment is constructed in a culture dish; single cells are fixed by negative pressure suction in the microdroplet, the quartz nanoinjection needle loaded with injection material penetrates the weakened cell wall in the axial direction, and the material is delivered by positive pressure; the needle is withdrawn and the cell is released. The microinjection method is realized by the yeast cell microinjection system. The high bending stiffness quartz nanoinjection needle is combined with the cell wall weakening treatment, and the stable, low damage puncture of the small size and high rigidity yeast cell is realized; at the same time, the stable osmotic pressure and operation culture space are provided by the microdroplet environment, which is suitable for gene operation and accurate delivery of material at single yeast cell level.

The invention provides a Tl-series superconducting thin film and a preparation method thereof, and belongs to the field of superconducting thin film materials. The preparation method of the Tl-series superconducting thin film provided by the invention comprises the following steps: mixing nitrate or acetate of metal, ethylenediaminetetraacetic acid, a water-soluble high-molecular polymer and water to obtain precursor sol; the metals are thallium, barium, calcium and copper; the molar ratio of thallium to barium to calcium to copper to ethylenediamine tetraacetic acid is (2-3): 2: 1: 2: (7-8); coating a substrate with the precursor sol to obtain a precursor film; and carrying out heat treatment on the precursor thin film in an oxygen atmosphere under a closed condition to obtain the Tl-series superconducting thin film. The Tl-series superconducting thin film obtained by the preparation method provided by the invention presents a Tl-2212 phase, no impurity phase is generated, and the critical transition temperature can reach 100K and is close to the Tl-2212 theoretical superconducting transition temperature.

The utility model discloses a layered structure of soilless culture, it includes planting pot, is equipped with planting matrix and water absorption rope in the planting pot, plants are planted in the planting matrix, and the water supply liquid is transported to the planting matrix through the water absorption rope, the planting matrix is divided and has a plurality of areas, and plants are planted in the planting layer, and the water absorption rope is arranged in the water saturation layer. The utility model realizes efficient water supply, and the water supply liquid is accurately transported to the water saturation layer through the water absorption rope, and in combination with layered design, the water saturation layer, planting layer and moisture retaining layer realize water gradient distribution, satisfy the demand of different growth stages of plants, avoid root waterlogging or drought, and the water saturation layer, planting layer and moisture retaining layer combination, give consideration to water conservation, ventilation and nutrient supply.

This invention discloses a method for crop nutrient remediation, comprising: digging an aeration trench on either side of the crop to be remediated; laying a layer of soil, mixing waste fruit peels with a fermentation agent at 0.1%–0.2% of the total weight of the fruit peels, placing the mixture on top of the soil, and then covering it with soil with a moisture content of 38%–42% for sealed fermentation for 30–50 days. During fermentation, tap water is added daily until the soil moisture content reaches 38%–42%. After 20 days of sealed fermentation, the filtrate of the fermented material is collected daily and mixed to obtain a remediation solution; when the soil moisture in the aeration trench reaches 55%–60%, the remediation solution diluted 10–15 times is injected into the aeration trench, with 500–2000 ml of diluted remediation solution injected per crop, continuously for 3–5 days. This method of crop nutrient remediation, after injecting the remediation solution, can stimulate crops to absorb more nutrients from the soil, thereby improving crop yield and crop product quality.

The application discloses a kind of battery separators of chitosan aerogel microspheres and CNF composite and preparation method thereof, belong to lithium ion battery technical field.The battery separator includes polyolefin porous base film and the coating layer of at least one side surface of the base film;The coating layer is formed by coating and drying by coating slurry including chitosan aerogel microspheres and CNF;The chitosan aerogel microspheres are porous particles formed after chitosan is crosslinked, freeze-dried and crushed.The application constructs light, multistage pore structure coating layer by chitosan aerogel microspheres and CNF composite, significantly improves the wettability of electrolyte, liquid absorption rate and liquid retention rate of separator under the premise of extremely low weight gain, and has good thermal stability, effectively solves the contradiction that traditional ceramic coating weight and wettability cannot be compatible.

This application relates to a compact, modular anti-evaporation sphere for reservoirs, comprising a sphere and an outwardly protruding connecting portion integrally connected to the sphere. The sphere includes a sunshade portion on the upper side and a floating portion on the lower side. The connecting portion is a hollow ring with open upper and lower ends. The upper surface of the hollow ring consists of several continuous upwardly protruding arc-shaped convex surfaces, and the lower surface of the hollow ring consists of several continuous downwardly protruding arc-shaped convex surfaces. The lower end of the sunshade portion is integrally connected to the upper end of the connecting portion, and the upper end of the floating portion is integrally connected to the lower end of the connecting portion. Based on existing technology, this application can form a sphere with a connecting portion in a single process of extruding a preform and then blow molding, reducing the number of steps and saving time and cost. This application allows the sphere to slide down naturally under its own weight, making it difficult for the connecting portions to overlap. During sliding, it can press down the connecting portions of adjacent sunshade spheres, creating an outward movement trend and exposing the splicing gaps, achieving the purpose of orderly splicing.

This invention discloses a smart ecosystem for desert soil degradation that synergizes photovoltaic desertification control with the resource utilization of concentrated brine in agriculture. In this invention, industrial solid waste is transformed into multifunctional ecological restoration materials, constructing a stable aggregate structure for desertified soil. Simultaneously, the scientific configuration of salt-tolerant vegetation rapidly establishes a vegetation community adapted to the local environment, effectively curbing wind and sand erosion. The shading effect of the photovoltaic array not only reduces surface water evaporation but also creates a suitable microclimate for vegetation growth, gradually forming a virtuous cycle of soil-vegetation-microorganisms. This fundamentally reverses the desertification process, improves the regional ecological environment, and achieves efficient recycling of various resources through the construction of a complete closed-loop synergistic system. Furthermore, the stable electricity provided by the photovoltaic system not only meets its own operational needs but also drives seawater desalination and concentrated brine separation treatment, transforming concentrated brine into valuable resources for vegetation irrigation and soil improvement, avoiding resource waste and secondary pollution.

This utility model discloses a rice cultivation pot based on capillary self-watering and root oxygenation, belonging to the technical field of agricultural crop cultivation equipment. It includes a pot body with an open top; a partition is installed in the inner cavity of the pot body; the partition is placed horizontally and divides the pot body into an upper cultivation area for placing seedling substrate and cultivating seedlings, and a lower water storage area for storing liquid fertilizer and water; several capillary fiber ropes are installed on the partition; one end of each capillary fiber rope is placed at the bottom of the water storage area, and the other end extends through the partition into the seedling substrate in the cultivation area; the capillary fiber ropes can transport water from the water storage area to the seedling substrate in the cultivation area through capillary action; several ventilation holes are opened on the side wall of the pot body above the highest water storage height of the water storage area; effectively solving the problems of uneven water management, root hypoxia, and low fertilizer utilization rate existing in traditional rice seedling cultivation devices.

The present application relates to large industrial open cycle cooling water system, specifically to steam recovery device, circulating cooling system and circulating cooling method. Wherein the steam recovery device of the present application, including: at least one condenser pipe group, the condenser pipe group has condenser pipe, the surface of the condenser pipe is provided with fixedly connected heat exchange fin;Buffer cold water tank, the buffer cold water tank has water inlet pipe, the buffer cold water tank is communicated with the water inlet end of the condenser pipe by first pipeline;The first pipeline is communicated with first cooling water supply pump;The water inlet pipe has first valve, and the first pipeline has second valve;Raw water pool, the water outlet end of the condenser pipe is communicated with the raw water pool by second pipeline;Rotary centrifugal separation layer, the rotary centrifugal separation layer has at least two cyclones, each the cyclone has flow guide pipe respectively;The rotary centrifugal separation layer is vertically above the condenser pipe group.

This utility model specifically relates to a hydroponic root-controlling tide pot for promoting early flower bud differentiation. The outer pot of this root-controlling tide pot has a placement cavity. A ring-shaped barrier is provided at the bottom of the placement cavity. The outer pot is constructed to support the inner pot using the ring-shaped barrier, and the ring-shaped barrier also separates a water storage cavity at the bottom of the placement cavity. The inner pot is installed inside the placement cavity. A planting cavity is provided in the inner pot. A limiting frame is provided at the bottom of the inner pot. The limiting frame is fitted outside the ring-shaped barrier, providing radial limitation for the inner pot and allowing it rotational freedom around its own axis. Openings are provided on the bottom and side walls of the inner pot. The inner pot is constructed to connect the planting cavity and the placement cavity through the openings, allowing the crop roots in the planting cavity to grow into the placement cavity through the openings, and the rotational movement of the inner pot relative to the outer pot cutting the crop roots. This root-controlling tide pot effectively controls plant root growth, ensures water supply, and improves cultivation quality.

The invention provides a fresh-keeping solution for fresh-cut fruits and vegetables as well as a preparation method and application of the fresh-keeping solution. The fresh-keeping liquid comprises the following components in parts by weight: 0.06-1 part of limonene, 0.3-1 part of an emulsifier, 0.5-1 part of egg yolk lecithin, 10-21 parts of a chitosan aqueous solution, 4-16 parts of absolute ethyl alcohol and 160-185 parts of a weakly acidic buffer solution. When the fresh-keeping liquid provided by the invention is applied to the fresh-cut fruits and vegetables, an edible fresh-keeping film can be formed on the surfaces of the fresh-cut fruits and vegetables, evaporation of moisture on the surfaces of the fresh-cut fruits and vegetables can be reduced, respiration in tissues of the fresh-cut fruits and vegetables can be inhibited, the decay process of the fresh-cut fruits and vegetables can be delayed, and the components are safe and reliable.

This invention relates to the field of DC converter transformer technology, specifically to a photovoltaic-storage DC boost converter with a dustproof and waterproof sealed enclosure structure. The device includes a boost converter cabinet with air outlets on its sides and air inlets along the lower edge of its top, the air inlets communicating with the interior of the cabinet. The cabinet's interior features a one-way isolation mechanism that completely covers the interior of the air outlets, isolating dust and rainwater. In use, airflow is achieved through the air outlets on the surface of the cabinet, while a protective plate inside the cabinet covers the outlets. This protective plate blocks external rain and dust, and the airflow from an exhaust fan blows away and dries any water and dust entering the protective plate, achieving both waterproofing and dustproofing without compromising heat dissipation.

The application discloses a greenhouse environment control and field management integrated system, which comprises an irrigation system, an air mist system, a conveying pipeline and a sensing control system. The application can perform irrigation, pesticide application, ventilation, heating, dehumidification, cooling and other agricultural production management according to the growth requirements of crops, provide a supporting frame for tomato, cucumber and other hanging vine crops, and also provide wind pollination for solanaceous crops. The application has high system integration and rich functions, can effectively save greenhouse space, improve crop production efficiency, reduce labor during the production process, and provides help for intelligent control of facility agriculture.

The application discloses a deep coal seam resistance-dust suppression integrated eutectic base material and a preparation method thereof, which comprises components A and B; the component A is composed of a hydrogen bond donor and a hydrogen bond acceptor, and the molar ratio of the two is (1.5-2.5):1; the component B is composed of an antioxidant, a thickening agent and a surfactant, and the mass ratio of the three is 1:(1-6):(1-4); and the mass ratio of the components A and B is (15-25):1. Under the joint action of the above material, the material prepared by the application not only has the ability of inhibiting spontaneous combustion and dust suppression, forms a resistance-dust suppression integrated technology, does not affect the quality of raw coal, reduces the working procedure in the mine, and improves the systematicness and economy of disaster prevention and control.

The application relates to the field of water-saving irrigation technology, in particular to a water-saving irrigation device, which comprises a circular-arc groove, a plurality of adjusting assemblies are arranged in the circular-arc groove, the bottom surface of the circular-arc groove is fixedly connected with a water passing assembly, the end, away from the circular-arc groove, of the water passing assembly is fixedly connected with a plurality of supporting plates, the end, away from the water passing assembly, of each supporting plate is fixedly connected with a water storage tank, the water passing assembly is used for leading water into the water storage tank, a plurality of circular pipes are arranged in the water storage tank, a water inlet pipe is fixedly connected with the water passing assembly and is communicated with the water passing assembly, and the water inlet pipe is communicated with a water source. The water passing assembly, the water storage tank and the circular pipes are arranged in the soil, water can be supplied to plants in the soil, the evaporation amount of water is effectively reduced, water can be prevented from penetrating into the deep soil through the water storage tank, and the efficiency of irrigation water is effectively improved.

This invention provides a community greening irrigation device and its control method, belonging to the technical field of greening irrigation equipment. It includes a top cover, a movable filter plate, a rotating assembly, and a drive assembly. The filter plate is fixedly installed inside a water storage tank. The filter plate has an arc-shaped structure, and movable filter plates are rotatably installed at both ends of the filter plate. A rotating shaft is rotatably installed inside the water storage tank, and a scraper is installed on the rotating shaft via a connecting rod. The end of the scraper away from the connecting rod is in close contact with the filter plate. By providing a top cover, the water storage tank can be sealed during hot summers, reducing water evaporation and enabling irrigation during periods of low rainfall. The arc-shaped filter plate utilizes the characteristic of impurities settling at the bottom, preventing complete blockage. Even when impurities are deposited at the bottom, filtration can be performed above the arc-shaped filter plate, thereby improving filtration efficiency.

This invention relates to a pretreated reinforced recycled aggregate concrete and its preparation method, comprising the following raw materials: 320-360 parts cement; 20-40 parts fly ash; 80-120 parts mineral powder; 585-670 parts manufactured sand; 1050-1200 parts recycled coarse aggregate; 156-172 parts water; and 11-12.3 parts admixtures. After pretreatment, the concrete prepared from the recycled coarse aggregate exhibits significantly improved performance compared to the untreated recycled coarse aggregate. The synergistic effect of multiple pretreatment methods significantly improves the water absorption, crushing index, and apparent density of the raw coarse aggregate. Pretreatment of the recycled coarse aggregate provides enhanced conditions for internal hydration in the recycled concrete and simultaneously improves the surface roughness of the recycled coarse aggregate, thus enhancing the workability and increasing the strength of the concrete.

The utility model relates to the technical field of drainage floor drains, in particular to an odor-resistant floor drain which comprises a floor drain body and a sleeve, the floor drain body and the sleeve are both of a tubular structure, the sleeve comprises a sleeve body and a base, the sleeve body is of an up-and-down through structure and is connected to the exterior of the floor drain body in a sleeved mode, and the base is connected with the floor drain body in a sleeved mode. A gap exists between the side wall of the floor drain body and the side wall of the cylinder, the side wall of the floor drain body is further provided with a through structure communicated with the gap, and the base is of a hollow structure with an upward opening. The bottom of the barrel extends into the hollow area of the base through the upward opening and is connected with the inner wall of the base, and the upward opening of the base is not completely sealed by the bottom of the barrel. Therefore, the base is of a hollow structure with an upward opening, and a certain amount of water can be stored after the water flows into the base, so that a water seal layer is formed. As a sealing structure, the water seal layer can effectively prevent sewer odor from flowing back, and the indoor air quality is improved.

The invention discloses a sulfur-fluorine mixed acid evaporation, concentration and separation system, which comprises a mixed acid separation and concentration device used for heating, concentrating and separating sulfur-fluorine mixed acid, cooling obtained hydrofluoric acid steam to prepare hydrofluoric acid, and conveying obtained low-fluorine sulfuric acid to a sulfuric acid fluorine removal device through a pipeline; the sulfuric acid defluorination device is used for heating and separating low-fluorine sulfuric acid and removing fluorine-containing substances in the low-fluorine sulfuric acid, obtained sulfuric acid is conveyed to the sulfuric acid concentration device through a pipeline, and obtained hydrofluoric acid steam is cooled to prepare hydrofluoric acid; and the sulfuric acid concentration device is used for heating and concentrating sulfuric acid, and the obtained concentrated sulfuric acid is reused in the mixed acid separation and concentration device to obtain production water containing trace sulfuric acid. The invention also discloses a sulfur-fluorine mixed acid evaporation, concentration and separation method. According to the method, high-concentration concentrated sulfuric acid can be obtained from the low-concentration sulfur-fluorine mixed acid in the evaporation and concentration process, and comprehensive utilization of F and S resources is achieved.

The utility model discloses an energy -saving type is used for roof garden's sprinkling irrigation device relates to irrigation technical field, including photovoltaic board, the below of photovoltaic board is provided with top cover, the below of top cover is provided with water storage tank, the inside of top cover is equipped with water inlet, the inner wall fixed mounting of water inlet has funnel -shaped sheath, when raining, rain can drop on photovoltaic board, and flow through top cover and water inlet into water storage tank on photovoltaic board, under daily circumstances, due to the shelter of photovoltaic board, sunlight can not directly irradiate in water storage tank and top cover, can reduce the conduction of heat, reduce the evaporation of rainwater in water storage tank, simultaneously due to the evaporation of rainwater gas of funnel -shaped sheath not easy to float out, thereby further reduced the loss of rainwater in water storage tank, and then can directly use the rainwater in water storage tank when irrigating, through using natural water to irrigate green plants, the problem that the existing roof garden depends on tap water to irrigate green plants has been solved.

The utility model relates to material mechanics performance test technical field discloses a material low temperature mechanics performance testing device, include: base, support frame is set up on the base, and support frame includes upper crossbeam, middle crossbeam and at least two opposite support rod, and upper crossbeam fixedly arranged in the upper end of two support rods, and middle crossbeam is located below upper crossbeam and can slide between two support rods, test tool, including fixed part and moving part, fixed part is connected with upper crossbeam, and moving part is connected with middle crossbeam, the distance between moving part and fixed part can be adjusted through middle crossbeam, force component, set up between fixed part and moving part, dewar jar is set up on the base through the elevating system and is opposite setting with test tool, and the inside of dewar jar is used for placing test tool and heating element, the testing device of the utility model can obtain the mechanics performance information of the piece to be measured in the range of -196 DEG C to room temperature.