92results about How to "Prevent flooding" patented technology

The invention relates to the technical field of environment evaluation, in particular to a comprehensive evaluation method and system for a mine geological environment. The method comprises the following steps that mine ore content data, underground water level data, soil acidity and alkalinity data and mine geological meteorological condition data are obtained and subjected to time sequence synchronization processing, and corresponding ore content data, underground water level data, soil acidity and alkalinity data and mine geological meteorological condition data in the same time sequence range are obtained; mine geologic structure exploration data are obtained, three-dimensional space structure modeling and environment risk factor monitoring of all sites are carried out, meanwhile, environment risk comprehensive evaluation analysis and environment risk management analysis are carried out on a three-dimensional space model of mine geologic structure distribution, and mine geologic environment risk management decision suggestions are generated. And executing a corresponding mine geological environment risk level management decision treatment plan. According to the invention, comprehensive dynamic monitoring of the geological environment of the mine can be realized on different time scales and spatial position dimensions.

The invention discloses a preparation process of a highly graphitized fuel cell microporous layer with a graded pore structure and gradient wetting performance. The preparation method comprises the following steps: firstly, uniformly dispersing carbon black particles in a polyvinylpyrrolidone ethanol solution to prepare a homogeneous viscous spinning solution; then preparing a fiber membrane with a hierarchical pore structure on a plane structure through an electrostatic spinning process, and constructing an excellent water and gas transmission channel; partially entangled fibers are formed in the thickness direction; after drying, stabilization and pre-oxidation are carried out under carbon paper clamping and loading, and fibers are uniformly shrunk and refined; inducing the pre-oxidized fiber membrane to generate highly graphitized transformation under the clamping of a high-purity graphite flake; the preparation method comprises the following steps: taking polytetrafluoroethylene as a raw material, soaking the polytetrafluoroethylene in polytetrafluoroethylene turbid liquid under horizontal placement, drying and melting to enable the polytetrafluoroethylene to be distributed in a gradient manner in the vertical direction, so that good water and gas management performance under a full-humidity working condition (0-100% relative humidity) is realized; and the overall performance of the fuel cell is obviously improved.

The invention provides a construction method and device for a local knowledge graph, and the construction method comprises the steps: extracting a first concept from the multi-text data of a local database, and carrying out the classification and layering of the first concept; and confirming and supplementing the classified and layered first concepts, and optimizing the first concepts into a plurality of second concepts. And segmenting multi-text data into a plurality of text paragraphs in advance, and matching and associating the text paragraphs with the second concept. And respectively extracting a plurality of local concepts and relationships thereof from the associated text paragraphs, and constructing an entity relationship multi-tuple. And integrating similar local concepts in the entity relationship multi-tuple into the same local concept. And analyzing the similarity of all the relationships in the plurality of entity relationship multi-tuples, and evaluating the relevance among all the entity relationship multi-tuples. And based on this, obtaining the constructed knowledge graph. According to the semi-automatic construction method and device, on the basis that expert knowledge is well utilized, the method does not excessively depend on manual construction rules, and the reasoning and understanding ability of a large model is utilized to the maximum extent.

The invention discloses a vacuum brazing clamp and method for a water-cooled disc, and aims to overcome the defects that in the brazing process of the water-cooled disc, the clamping force of a tool on the water-cooled disc is not uniform, the temperature difference between the interior of a furnace and the water-cooled disc is large due to the fact that the tool absorbs much heat, and the brazing effect is affected. The water cooling disc comprises an upper tool pressing plate and a lower tool pressing plate which are connected together, the water cooling disc comprises a bottom disc and a cover plate, brazing filler metal pieces are loaded between the bottom disc and the cover plate, an upper heat insulation frame and a lower heat insulation frame are arranged between the upper tool pressing plate and the lower tool pressing plate, an upper thin plate is installed between the cover plate and the upper heat insulation frame, and a lower thin plate is installed between the bottom disc and the lower heat insulation frame. And the cold water plate is clamped between the upper thin plate and the lower thin plate. According to the vacuum brazing clamp for the water-cooling disc, the water-cooling disc brazing part can be prevented from being in direct contact with the tool plate, the heating and cooling effects of the brazing part in the brazing process are improved, and the uniformity of the pressure and the uniformity of the temperature during clamping of the brazing part are optimized.

The utility model provides a water level early warning device, and relates to the technical field of water level early warning. The lower end of the fixed vertical rod is of a conical structure. And a stabilizing disc is fixedly mounted at the lower end of the annular side wall of the fixed vertical rod. The water surface supporting and stabilizing disc and the early warning rod stably ascend, the early warning rod can give an alarm in time when being inserted into the alarm, workers can take corresponding measures to drain water in time, safety accidents such as flood disasters are prevented, possible resource waste and environmental damage are reduced, the alarm is effectively protected by the protective fence, and the safety of the workers is improved. In this way, outside sundries or birds and the like cannot make contact with the alarm, so that the alarm is protected, and the problems that in rainy seasons, due to the fact that the water level rises continuously, an alarm needs to be given in time to inform workers to take corresponding drainage measures, otherwise the water level is too high and flows everywhere to cause flood accidents, and the alarm also needs to be protected, and the working efficiency is high are solved. Once the alarm is damaged, the alarm cannot give an alarm in time.

The invention provides a gas diffusion layer for a fuel cell, a preparation method of the gas diffusion layer and the fuel cell. The gas diffusion layer for the fuel cell comprises a substrate layer, a first microporous layer and a second microporous layer which are stacked in sequence, wherein the first microporous layer comprises a carbon material and a first hydrophobic binder; and the second microporous layer comprises a hydrophilic modified carbon material and a second hydrophobic binder. According to the gas diffusion layer structure provided by the invention, the microporous layer and the hydrophobic layer which have hydrophilic and hydrophobic effects at the same time have a synergistic effect, so that the gas diffusion layer structure can adapt to working conditions of different humidification conditions, the cell performance is maintained, and the performance of a fuel cell under low humidification can be improved without additional treatment.

The invention discloses a fuel cell internal water state monitoring method and system and a management method. The method comprises the following steps: training a fuel cell water state observation model by using a training sample set to obtain training prediction data; calculating a training loss value between the training prediction data and the real label according to component diffusion, liquid water transmission, modal water transmission, ion and electron transmission and heat transmission in a direction perpendicular to a proton exchange membrane in the fuel cell; optimizing parameters of the fuel cell water state observation model according to the training loss value to obtain a trained fuel cell water state observation model; inputting the real-time operation data into a pre-constructed fuel cell water state observation model to obtain evaluation data of the water content in the fuel cell; the water state in the fuel cell can be quickly responded and accurately monitored, and the fuel cell is regulated and controlled according to the water state in the fuel cell, so that a membrane dry fault and a water logging fault of the fuel cell are avoided.

The utility model discloses a flood control inland inundation well lid with a monitoring effect, which comprises a base fixing ring, the top surface of the base fixing ring is fixedly provided with a mounting seat and a hinge seat positioned on one side of the mounting seat, and the surface of the hinge seat is provided with a well lid in a hinged manner. The height of the water level below the well lid can be detected, detection data can be transmitted to a controller, the controller processes the detection data and then sends the data to a control center, workers can conveniently monitor the water level of a sewer, flood disasters are prevented, a fixing assembly is arranged, a pressing block is moved outwards, an inserting rod is moved out of an inserting hole, and the fixing assembly is arranged. The ultrasonic liquid level sensor can be detached by sliding the ultrasonic liquid level sensor, and meanwhile, under the action of a spring, a movable block is pushed to move, so that an insertion rod enters an insertion hole, the ultrasonic liquid level sensor can be fixed, and the ultrasonic liquid level sensor is convenient to maintain or replace.

The invention discloses a thick oil emulsifying viscosity reducer composition which comprises alkyl amide propyl hydroxy sulfobetaine, a quaternary ammonium salt compound containing tertiary amine and hydroxyl and water, and the content of the alkyl amide propyl hydroxy sulfobetaine is 10%-40%, preferably 25%-30%, the content of the quaternary ammonium salt compound containing tertiary amine and hydroxyl is 10%-40%, preferably 25%-30%, and the content of the quaternary ammonium salt compound containing tertiary amine and hydroxyl is 10%-40%. 3%-15%, preferably 8%-10%, of a quaternary ammonium salt compound containing tertiary amine and hydroxyl. The thick oil emulsifying viscosity reducer with strong foaming performance provided by the invention can emulsify thick oil to form an oil-in-water emulsion, so that the viscosity of the thick oil is obviously reduced, and the fluidity of the thick oil is improved; and the viscosity reducer has good foaming performance and foam stabilizing performance, can effectively block high-permeability pore channels, reduces the water channeling degree, and improves the sweep efficiency of the viscosity reducer, thereby improving the recovery rate of heavy oil.

The utility model relates to a mine repairing device in the technical field of mine repairing, and the mine repairing device comprises a metal net which is arranged on a side slope of a mine, and a gap is reserved between the metal net and the side slope; the base layer covers the side slope and the metal net; and the seed layer covers the substrate layer. According to the mine remediation device, the adhesive capacity of soil on the side slope of the mine can be improved, and the survival rate of green plants is increased.

The present invention relates to the technical field of greening concrete, and in particular to a construction method of mixed greening concrete with grass and trees and shrubs. It mainly aims at the problem that the soil of existing greening concrete is easy to lose and the amount of watering for plants is inconvenient to control, and proposes the following technical scheme: including a concrete model, the concrete model includes a growth frame body, the growth frame body includes a shrub growth area, a grass growth area one and a grass growth area two, and a water guide plate is arranged on one side of the shrub growth area. The present invention selects and proportions concrete and raw materials to prepare a concrete growth frame with good water permeability and air permeability, which is conducive to the growth of plants, and the raw materials are easy to obtain and low in cost. The structural setting of the growth frame enables each layer of plants to control the amount of irrigation water, avoids the plants being flooded due to excessive water, avoids soil loss, is conducive to the growth of plants, is suitable for promotion and use, and is mainly used in greening concrete.

The utility model relates to the technical field of drainage templates, and discloses a template device for pouring a U-shaped drainage ditch. Comprising a first outer formwork and further comprises a second outer formwork arranged on one side of the first outer formwork and used for limiting during drainage, the second outer formwork is connected with the first outer formwork in a clamped mode, one side of the second outer formwork is fixedly connected with a mounting block, and a connecting rod is arranged in the mounting block; according to the utility model, the first outer template and the second outer template can be conveniently detached by arranging the detaching assembly, the garbage can be conveniently cleaned, the unsmooth drainage, water accumulation and flood are avoided, and meanwhile, the large water flow impact can be avoided after the cleaning, so that the construction efficiency is improved, and the construction cost is reduced. And long-term water flow impact and pressure of accumulated water may damage the structure of the drainage ditch to cause failure of the drainage system, so that the practicability of the equipment is improved.

The invention relates to the technical field of logistics cartons, in particular to a logistics carton with a protection structure, which comprises a carton body, two preformed holes are formed in each of two sides of the carton body, insertion pipes are inserted into the two preformed holes in one side of the carton body, one end of each insertion pipe is sleeved with a screw joint sleeve in a screw joint manner, and the other end of each insertion pipe is sleeved with a protective cover. The other end of the insertion pipe is fixed to the surface of a plastic backup plate, a first storage groove is formed in the plastic backup plate, and a flexible wear-resistant cover is fixedly arranged in the first storage groove in a sleeving mode; the paper box has the beneficial effects that through the design of the flexible wear-resistant cover, a protective layer can be formed outside the paper box body to prevent water immersion and wear, and additional storage protection can be provided when the paper box is damaged to prevent internal articles from directly falling off.

This utility model provides an age-friendly bicycle shed suitable for older residential communities, comprising a floor, a fence, and a roof. The floor has an entrance / exit ramp and a parking loop connecting the ramp. Parking areas are located on both sides of the parking loop, and entrance / exit points are formed at the locations corresponding to the ramps on both sides. The parking areas inside the parking loop enclose a waiting area in the center of the floor, which includes a pedestrian walkway. The fence has double-leaf gates corresponding to the ramps, with three states: a first state of closed ramps, a second state of open ramps and closed entrance / exit points, and a third state of open ramps and entrance / exit points. The roof is fixedly connected to the top of the fence and covers the floor. This age-friendly bicycle shed for older residential communities provides convenient parking, allows for the closure of the double-leaf gates for theft prevention, and provides a waiting area for elderly people to rest and wait, thus improving the age-friendly functionality of the bicycle shed.

The invention relates to the technical field of flood control, in particular to an automatically-closed water bag flood bank structure suitable for a river bank zone. Comprising a first water-collecting well, a second water-collecting well, a plurality of drain holes, a plurality of communicating holes and an elastic expansion bag, wherein the first water-collecting well and the second water-collecting well are dug on the outer side of a riverway; the first water-collecting well is communicated with the inside of the riverway through the drain holes; the second water-collecting well is located on the first water-collecting well side away from the river; the elastic expansion bag is fixed at the top end in the second water-collecting well; when water in the river channel enters the second water collecting well from the first water collecting well, the second water collecting well is filled with water and enters the elastic expansion bag, so that the elastic expansion bag is forced to protrude out of the second water collecting well. The water storage and drainage effect is achieved through the first water collecting well, and the water interception effect is achieved through expansion of the second water collecting well and the elastic expansion bag.

The application discloses a low-voltage cable branch box with a dehumidification function, relates to the technical field of power box dehumidification, and comprises a power box, a dehumidification assembly, a cabinet door rotatably arranged on the front side of the power box, a rain and snow sensor arranged on the front side of the cabinet door, and a ventilation device arranged on the bottom of the inner wall of the power box. The dehumidification assembly comprises a separation plate, a bearing frame, an electric push rod, a connecting frame, a connecting groove, an activated carbon plate, a hollow rod, a solid rod and a separation hole. The rain and snow sensor sends signals to the ventilation device through a signal output module. After a signal input module in the ventilation device receives a rain and snow stop signal, the ventilation device is operated to quickly ventilate and dehumidify the inside of the power box. The separation plate is fixedly arranged on the left side of the power box. After rain and snow stops, the ventilation device is automatically started to quickly ventilate, so that intelligent switching of rain and snow absorption dehumidification and sunny day ventilation dehumidification can be realized, and the moisture-proof effect is improved.

The invention discloses a roadway intercepting well and a working method thereof. The roadway intercepting well comprises an intercepting well body, a first gate, a second gate and a linkage assembly. Wherein the catch basin body is a main body structure of the roadway catch basin, the first gate is used for controlling whether water flows to a sewage pipeline or not, and the second gate is used for controlling whether the water flows to a drainage pipeline or not. The linkage assembly is connected with the first gate and the second gate, when the first gate is opened, the second gate is driven to be closed, and when the first gate is closed, the second gate is driven to be opened. When the daily water flow is less, sewage can be intercepted in the first well chamber and flows out of the sewage intercepting branch pipe to an external sewage pipeline; when the water flow in rainy days is large, rainwater crosses the first water passing hole and drives the driving piece to move, the first gate is closed and the second gate is opened through the impact force of the water flow, and therefore dependence on external energy is reduced, and the effects of energy conservation and emission reduction are achieved. The invention relates to the technical field of intercepting wells.

The utility model relates to the technical field of drainage, in particular to a drainage system for a fan platform and a road slope of a mountain wind power plant. The road is connected with a fan platform, an excavation side slope is arranged on the side, close to a mountain, of the road, the excavation side slope is sequentially provided with a plurality of side slope structures from top to bottom in the slope direction of the excavation side slope, and the drainage system comprises a first water retaining ridge arranged on the side, away from the mountain, of the road and arranged in the extending direction of the road; the first drainage ditch is arranged on the side, close to the excavation slope, of the road and used for collecting and conveying water on the excavation slope and the road; the first intercepting ditch is arranged at a riding track between two adjacent side slope structures and is used for collecting water on the side slope structures above the first intercepting ditch; and the drainage pipeline is used for conveying water in the first intercepting ditch to the first drainage ditch. The problems of large-area scouring and water erosion of water flow to the slope surface and the road surface can be effectively solved, the stability of the slope and the roadbed is effectively improved, and a guarantee is provided for long-term stable operation of a mountain wind power plant.

The utility model provides a proton exchange membrane fuel cell bipolar plate variable period variable cross-section runner and bipolar plate, including bipolar plate, the runner of bipolar plate includes ridge and groove that are arranged at interval, the ridge at the both sides of same groove is symmetrically arranged along the central line of groove, the both side walls of groove are variable period wave shape, and the ridge is in the variable period wave shape. A bipolar plate runner periodically shrinks and expands in the reaction gas flowing direction, the center line of a groove serves as the x axis, the transverse fluctuation amplitude y of the side wall of the single side of the groove meets the function y = A * sin (Bx + C) + D, A, C and D are all constants, the period # imgabs0 # meets the curvilinear function # imgabs1 # k based on the Sigmoid function, m, n and q are all constants, and the symmetrical opposite side walls meet the function y '=-y. By adopting the variable-period variable-cross-section flow channel, the shrinkage cycle period of the outlet side flow channel is prevented from being too small, the reaction gas flow stability of the inlet section and the outlet section is improved, the flow speed and the pressure can be adjusted in the flow channel, the under-ridge mass transfer capacity is enhanced, the better liquid water discharge effect is achieved, and water logging is prevented.

The invention discloses a phosphorite flotation collecting agent and a preparation method and application thereof. The phosphorite flotation collecting agent is prepared from the following components in percentage by mass: 10-30% of vegetable oil, 1-5% of sulfuric acid, 1-5% of an alkaline compound and the balance of water. The preparation method of the phosphorite flotation collecting agent comprises the following steps that vegetable oil and water are evenly mixed according to the component proportion, then a sulfuric acid solution is added, and sulfonation reaction is conducted at the temperature of 70-120 DEG C; and after the sulfonation reaction is completed, an alkaline compound is added under the condition of 70-100 DEG C, saponification is conducted at the constant temperature, and the phosphorite flotation collecting agent is prepared. The collecting agent can be produced in a single reaction kettle in the production process, the production process is simplified, the reaction conditions are mild, and danger is reduced. When the collecting agent is used for flotation, the collecting agent does not need to be dissolved with hot water, meanwhile, foam which is good in state, stable and non-sticky can be generated, and therefore the flotation effect is optimized.

The invention belongs to the technical field of fabricated buildings, and particularly relates to an embedded pipeline technology-based fabricated thermal insulation outer wall, which comprises a first thermal insulation wall and a second thermal insulation wall, a pipeline platform is poured at the corner of the first heat insulation wall and the second heat insulation wall; a drainage vertical pipe and an exhaust vertical pipe are arranged in the pipeline platform; protection monitoring assemblies are uniformly arranged on the drainage vertical pipe and the exhaust vertical pipe; a supporting steel frame is built on the left side of the rectangular steel and located in the first heat insulation wall. A rotating shaft is rotationally installed on the side, away from the first heat insulation wall, of the supporting steel frame. Uniformly arranged rotating plates are arranged on one side, far away from the first heat insulation wall, of the supporting steel frame; by arranging the protection monitoring assembly, the drainage vertical pipe and the exhaust vertical pipe can be protected, and meanwhile whether the drainage vertical pipe and the exhaust vertical pipe are damaged or not can be monitored.

The application relates to a liquid return prevention distillation system, belonging to the technical field of waste liquid treatment, which is characterized in that a phase change energy storage tank is arranged between an evaporation kettle and a condenser, the first electromagnetic valve and the third electromagnetic valve are opened, and the second electromagnetic valve is closed before the compressor is started, the phase change energy storage tank is in an evaporation section, the suction temperature is improved, and the liquid return phenomenon is avoided, the second electromagnetic valve is opened, the first electromagnetic valve and the third electromagnetic valve are closed after the evaporation kettle boils, the phase change energy storage tank is in a condensation section, the phase change energy storage tank absorbs heat, energy storage for the next start after discharge is facilitated, and quick start is realized.

The utility model provides an automatic stereoscopic warehouse fire-fighting drainage outer wall with a drain hole, which is characterized in that a guide wall is fixed at the bottom of the outer wall through a transverse wall purlin, the drain hole is reserved in the guide wall, a drain hole wall is embedded in the drain hole, and the indoor side of the drain hole wall is fixed with the wall purlin and the concrete guide wall. The outdoor sides of the drain holes are connected with upper and lower metal edge closing strips of the outer wall respectively. Belongs to the technical field of construction of steel structure industrial buildings. The outer wall drainage hole is simple and convenient, drainage is facilitated on the premise that the functional requirement of an indoor floor is not affected, stainless steel vertical electric shutters with fire-fighting linkage are installed on the inner side of the drainage hole and closed at ordinary times, accumulated water in a site is prevented from flowing backwards, a metal cover plate and an insect-proof net are arranged on the outer side, the facade effect is integrally unified, and sanitation is guaranteed.

This application relates to a spray humidification device and a fuel cell system. The spray humidification device includes: a main shell having an evaporation chamber and a turbulence chamber, the evaporation chamber being divided into multiple independent spray chambers, which are connected to the turbulence chamber; multiple spray nozzles disposed on the main shell, each nozzle connected to a spray chamber and spraying liquid water into the spray chamber, the liquid water being capable of vaporizing into gaseous water; multiple turbulence plates spaced apart in the turbulence chamber, the turbulence plates being used to turbulent the unvaporized liquid water and gaseous water and air; and an output pipe disposed at one end of the main shell and connected to the turbulence chamber, the output pipe also being connected to the cathode inlet of the fuel cell stack, for inputting gaseous water and air into the cathode inlet. This ensures atomization effect and prevents liquid water accumulation, thereby preventing liquid water from entering the fuel cell stack and causing flooding, thus preventing fuel cell system malfunction.

This invention relates to a method for treating and utilizing high magnesium-to-sulfur ratio chlorine-containing wastewater, belonging to the field of environmental protection. This invention utilizes inexpensive calcium alkali to treat high magnesium-to-sulfur ratio chlorine-containing wastewater. During the treatment process, dilute hydrochloric acid is used as a circulation starter. Taking advantage of the difficult-to-remove chloride ions in the wastewater, the calcium alkali is used to generate calcium chloride solution, thereby continuously recovering sulfate ions from the high magnesium-to-sulfur ratio wastewater. Magnesium is converted into magnesium hydroxide, transforming into valuable by-products such as calcium chloride and gypsum, thus achieving resource utilization of waste. This method reduces the environmental impact of wastewater discharge, while also reducing treatment costs and achieving resource recycling. It is highly feasible for existing enterprises and has significant economic, social, and environmental benefits.

The utility model discloses a remote monitoring water quality monitor for lake blue-green algae treatment, which comprises a shell, one side of the inner bottom wall of the shell is fixedly connected with a motor, the output end of the motor is fixedly connected with a rotating rod, one end of the rotating rod is fixedly connected with a paddle, and the bottom of the outer surface of the shell is fixedly connected with a protective cover. According to the remote monitoring water quality monitor for lake blue-green algae treatment, through the arrangement of a motor, a paddle, a protective cover, a probe and an electric telescopic rod, the electric telescopic rod stretches out and draws back to drive the probe to move up and down, then the water quality of a sampling point in lake water at different depths can be monitored, the motor drives a rotating rod to rotate, the paddle rotates, and the water quality is monitored. The device is driven to move in water, the moving flexibility is improved, all-directional monitoring on the whole lake water is facilitated, data obtained through monitoring are more accurate, the monitoring efficiency is improved, the monitoring range is widened, the upper half portions of the paddles are shielded by the protective covers, and the protection performance and the use safety are improved.

The present invention relates to the technical field of digital flood storage analysis, and in particular to a method and system for regulating and managing flood diversion gates for digital flood storage analysis. The method comprises the following steps: constructing a terrain model of a flood storage area; obtaining historical flood storage hydrological data of the flood storage area; conducting spatial hydrological characteristic coupling analysis of the flood storage mode on the historical flood storage hydrological data according to the flood storage area terrain model, and generating spatial hydrological characteristic data of the flood storage mode; constructing a flood storage dynamic generalization model based on the flood storage area terrain model and the flood storage mode spatial hydrological characteristic data; conducting flood storage dynamic generalization model based on the flood storage dynamic generalization model to simulate and analyze flood characteristics in the flood storage embankment, and generating flood characteristic simulation data in the flood storage embankment; analyzing simulated land planning data in the embankment area based on the flood characteristic simulation data in the flood storage embankment; and designing intelligent regulation and decision making of the flood diversion gate based on the simulated land planning data in the embankment area and the flood characteristic simulation data in the flood storage embankment. The present invention realizes accurate analysis of flood characteristics in the flood storage embankment.

The invention discloses an adblue production rectification purification control process which comprises the following steps: introducing liquid carbon dioxide and liquid ammonia from the bottom of a urea synthesis tower for reaction to obtain a synthesis liquid; introducing the synthetic liquid into a stripping tower for stripping, and separating part of unreacted gas in the synthetic liquid; introducing the synthetic liquid subjected to steam stripping into a rectifying tower for rectification; in response to the fact that the liquid level of each layer in the tower body is lower than a preset value, each first valve and each second valve are kept in an open state, and each third valve is kept in a closed state for rectification; in response to the condition that the liquid level of a layer in the tower body is higher than or equal to a preset value, closing the first valve and the second valve of the layer of which the liquid level is higher than or equal to the preset value, opening the corresponding third valve, and stopping ventilation for rectification; heating and evaporating the rectified synthetic liquid to obtain urea crystals; and granulating the urea crystals to obtain granular urea. The method can effectively reduce the influence of the flooding condition on the urea production efficiency.

The utility model discloses a kind of booster self-suction water pump integrated installation structure of fire-fighting robot, belong to fire-fighting robot technical field.The structure includes the robot chassis with water pump cabin, cabin is integrated with booster self-suction water pump, the engine and water pump battery for its power supply.Water pump is installed in the bottom of cabin by water pump fixed support, and shock pad with metal clamping plate is arranged between the two to isolate vibration.Water pump water inlet and water outlet are connected by water inlet quick connector and water outlet quick connector respectively, realize pipeline quick disassembly.Water pump cabin top surface is provided with inclined flow guide surface, bottom bearing surface is designed with drainage leak hole, to realize automatic drainage.The utility model realizes the efficient shock absorption of water pump system, quick maintenance and reliable integration, significantly improves the operation stability and maintenance convenience of fire-fighting robot extinguishing system in harsh operating environment.

The application relates to the technical field of fuel cell engine control, in particular to an anode control method and device of a fuel cell engine and a vehicle, wherein the method comprises the following steps: collecting an actual temperature of an environment currently where the fuel cell engine is located; in the case that the actual temperature is greater than or equal to a first preset temperature threshold and less than or equal to a second preset temperature threshold, acquiring a current power of the fuel cell engine; and generating a first hydrogen discharge action of exhaust anode waste gas according to the current power of the engine and / or a target humidity of a stack and a current humidity. Therefore, the problem that, in the prior art, a water distributor cannot be adjusted according to different working conditions and it is difficult to meet the humidity requirement of a stack membrane under different working conditions, thereby affecting the performance and service life of a fuel cell, is solved.