54results about How to "Solve problems such as blockage" patented technology

The invention discloses a method for optimizing ammonia nitrogen mole ratio distribution of an SCR denitration system. The method comprises the following implementation steps: detecting to obtain NOX concentration distribution within each control period at the inlet of the SCR denitration system and NOX concentration distribution and NH3 concentration distribution within each control period at the outlet; within each control period, calculating an ammonia nitrogen mole ratio distribution relative standard deviation factor CVm of the SCR denitration system within the current control period, and while the ammonia nitrogen mole ratio distribution relative standard deviation factor CVm exceeds a preset threshold value, automatically optimizing in allusion to an ammonia spraying control valve of the SCR denitration system, ending and quitting the automatic optimization while the ammonia nitrogen mole ratio distribution relative standard deviation factor CVm does not exceed the preset threshold value. The method is capable of effectively regulating the ammonia nitrogen mole ratio distribution of the SCR denitration system, solving the problems that the outlet ammonia escape rate of the SCR denitration system is high, the outlet NOX concentration distribution is not uniform and the produced ammonium bisulfate blocks an air pre-heater, remarkably improving the flow field distribution in an SCR reactor, and effectively improving the availability ratio of the SCR denitration system.

The invention relates to a system and method for preventing ammonium bisulfate from blocking an air preheater after SCR denitration modification. In the system, the average temperature of the overallheating surface of the air preheater is increased by cancelling the area of a cold-section heating surface of a traditional rotary air preheater, so that the ammonium bisulfate ash blocking of the airpreheater is prevented; meanwhile, the excess heat of exhaust smoke is absorbed by low-pressure and low-temperature economizers arranged in a connecting gas flue from a dust remover to an induced draft fan to control the temperature of the exhaust smoke, and the economical efficiency of a unit is improved; the control over a primary hot air temperature and a secondary hot air temperature of an outlet of the air preheater is achieved through air heaters installed on a primary cold air duct and a secondary cold air duct respectively, on the premise that it is ensured that the secondary hot airtemperature is slightly reduced, the volume of cold air mixed into the primary hot air is reduced, the temperature of the exhaust smoke of a boiler is reduced, and the boiler efficiency is improved. By means of the system, the problem that ammonium bisulfate blocks the rotary air preheater after the SCR denitration modification of the coal-fired boiler can be solved, and moreover, the net coal consumption rate can be saved by 1.1 g / kwh.

The invention belongs to a method for preparing a microelectrolysis filler by using various industrial solid wastes and particularly relates to a treatment method for comprehensive utilization of various industrial solid wastes. Aiming at the drawbacks of the conventional microelectrolysis filler, the invention provides a method for preparing the microelectrolysis filler, which is different from the conventional microelectrolysis filler, by using various industrial solid wastes. In the method, the various industrial solid wastes are subjected to innocent treatment in high-temperature and high-heat environments by taking full advantage of the chemical components of the various industrial solid wastes, adopting a mixing, pelletizing and roasting process and fully utilizing a roasting system, and then are prepared into the microelectrolysis filler; and the method has unique technical and economic advantages and meets environment-protection requirements.

The invention provides a rotary calcining furnace. The rotary calcining furnace comprises a furnace tube, a heating part and a liquid feeding liquid mixing device, wherein the liquid feeding liquid mixing device comprises a liquid mixing container, a turbulence plateand a fixing piece; and the liquid mixing container is provided with a feeding portand a material supplying port,the turbulence plateis fixed inside the liquid mixing container through the fixing part. The rotary calcining furnace is perfect in design, good in performance and convenient to operate, and can well solve the problemsthat materials are not uniform, the inner wall of the furnace tube is bonded, blocked and the like in a radioactive waste liquid rotary calcining process, industrial production is easy to realize, andtechnical support is provided for development and improvement of the two-step cold crucible glass curing technology in China.

The invention discloses a grading sectional acquisition apparatus for water body suspended solids, which belongs to the technical field of environmental monitoring and relates to suspended solid sample acquisition of rivers, lakes and reservoirs. The grading sectional acquisition apparatus comprises a lifting ring, a mooring rope with scales and a grading sectional acquisition apparatus for suspended solids, wherein the mooring rope with scales is wound on a wire shaft, penetrates through the lifting ring and is connected with the grading sectional acquisition apparatus for suspended solids; the acquisition apparatus is in the shape of a circular barrel, divided into a top water outlet part, a middle suspended solid collecting part, a barrel bottom supporting base and a bottom water inlet part; the middle suspended solid collecting part is divided into an upper suspended solid collecting layer, a middle suspended solid collecting layer and a lower suspended solid collecting layer which are stacked from top to bottom in sequence; the three suspended solid collecting layers are connected through a flange plate type structure. The grading sectional acquisition apparatus achieves home positions, weak perturbation and grading sampling of the suspended solids, avoids a filter membrane blockage problem, can be used for obtaining suspended solid samples with different grain sizes, is convenient to operate, good in fidelity, high in precision and strong in representativeness, and can be used for acquiring suspended solid samples in water body of rivers, lakes, reservoirs and the like.

The invention discloses a micro-positive pressure auto-compensation rock bit lubricating system which comprises a tooth claw (1) and a tooth wheel (3). A slurry channel (8) is arranged in the tooth claw (1), an oil storage bag hole (9) is arranged on the upper portion of the tooth claw (1), an oil storage bag (10) is arranged in the oil storage bag hole (9) and is internally communicated with an oil passing channel (7) through an oil duct, and a compensation cavity (14) is communicated with the slurry channel (8) through a pressure leading hole (15). The micro-positive pressure auto-compensation rock bit lubricating system has the advantages that pressure of slurry in a bit serves as driving force of the auto-compensation rock bit lubricating system, the pressure leading hole cannot be blocked easily, service life of the rock bit is prolonged; pressure of slurry in the rock bit serves as compensation lubrication power and is larger than annulus pressure, pressure differential of the lubricating system is remarkably increased, and micro-positive pressure auto-compensation is achieved; a roll ball and a spring are arranged, pressure drop is formed, counter flow of the slurry is avoided, stability of the driving force is enhanced, and lubricating efficiency is improved.

The invention discloses a discharging device for a heat accumulating type thermal decomposition furnace to treat pyrogenic decomposition solid products of a junked tire. The discharging device comprises a shell, a material laying plate used for containing the solid products, a chain board wheel transmission assembly, a driver and a plurality of material scraper blades. A discharge opening is formed in the shell. The material laying plate is movably arranged inside the shell. The chain board wheel transmission assembly is arranged inside the shell and placed above the material laying plate. The driver drives the chain board wheel transmission assembly to operate. The material scraper blades are respectively arranged on a transmission chain of the chain board wheel transmission assembly, the transmission chain drives the material scraper blades to move, and the material scraper blades push the solid products to the discharge opening. According to the discharging device, the traditional problems of material clamping, blocking and the like are solved, the continuous discharging purpose is achieved, the operating cost caused by abnormal maintenance and overhauling is greatly lowered, carbon black can be effectively prevented from being ground into powder, the potential risk caused by raised dust is avoided, and meanwhile the physical property of the solid products can not be damaged.

The invention discloses a method for producing a double-layer metal band through double-faced adhesive tape bonding and rolling. The method is characterized in that the double-layer metal band is formed by gathering a stainless steel band (15), a galvanized steel band (10) and a double-faced adhesive tape (11) located between the stainless steel band (15) and the galvanized steel band (10) at the same speed and pressing by using a pressing device composed of an upper pressing roller (9) and a lower supporting roller (4); the base band material of the double-faced adhesive tape is a coiling tape made of an OPP (Oriented Polypropylene) material, and acrylic polymer binding agents are coated on two faces of the coiling tape; the width of the double-faced adhesive tape is consistent with that of the stainless steel band (15) led out by a stainless steel band coil.

The invention discloses a draining and oxygen adding device for a full-automatic heater. The device comprises the following components: a PLC; a pressure detector for collecting a pressure signal in pipeline at an oxygen adding point, and transmitting the pressure signal to the PLC; a dissolved oxygen content detector for collecting a dissolved oxygen content at a detecting point and transmittingthe dissolved oxygen content signal to the PLC; an oxidation-reduction potential detector for collecting an oxidation-reduction potential at the detecting point and transmitting the oxidation-reduction potential signal to the PLC; a hydrogen conductivity detector for collecting hydrogen conductivity at the detecting point and transmitting the hydrogen conductivity signal to the PLC; and a flow controller connected with an oxygen source and for controlling oxygen addition flow according to the PLC command. The invention also discloses a draining and oxygen adding method for the automatic heater. The oxygen adding device of the invention can avoid clogging of a drainage valve on a high-pressure heater shell side pipeline, and maintain safe and economical operation of the unit at an OT working conditions.

The invention discloses a scale-type fire bar of a garbage burning roller; a fire bar surface with an inclined angle of 10 to 60 degrees is built by a plurality of rollers; besides, certain fire bar sheets which are axially arranged and rotatable are arranged on the rollers; the fire bar sheets are crossed into scale type. In order to prevent blocking and plugging caused by the deformation of each fire bar sheet due to being heated, the two sides of the fire bar surface are provided with blocking-proof salients. Dirt traps are arranged among the rollers for preventing leakage and leading transportation to be more spontaneous.

The invention discloses a trash rack type sewage inspection well. The trash rack type sewage inspection well comprises an inspection well, and a water inlet pipe and a water outlet pipe which are arranged on the side wall of the inspection well, wherein a basket type trash rack is arranged at the pipe orifice of the water inlet pipe; an opening matched with the pipe orifice of the water inlet pipe is formed in the side wall, positioned on one side of the pipe orifice of the water inlet pipe, of the basket type trash rack; a trash grate is arranged at the pipe orifice of the water outlet pipe; the basket type trash rack and the trash grate are both positioned in the cavity of the inspection well. The trash rack type sewage inspection well has the advantage that the problem of pipeline blockage caused by sundry sedimentation and flow retarding is solved, so that most of sundries are concentrated in the basket type trash rack and are periodically cleaned in a concentrated mode, the dredging workload is small, the operation management is convenient, and the operation safety stability of an urban sewage system is effectively improved.

The invention provides a closed-loop control system for three-dimensional micro-area electrochemical deposition. The closed-loop control system comprises a micro-tube device, a workbench and a main controller, wherein the micro-tube device and the workbench are in electric control connection with the main controller, and the micro-tube device, the surface of a machined product and the main controller form a first loop; a first closed-loop control scheme and a second closed-loop control scheme are stored in the main controller; and when the first closed-loop control scheme is executed, the maincontroller controls the micro-tube device to approach the surface of the machined product borne by the workbench until the main controller detects that the first loop feeds back a preset approachingcurrent value Ia, and the second closed-loop control scheme is executed, so that the main controller controls the micro-tube device to be matched with the workbench, and electrochemical deposition machining is started on the surface of the machined product, and therefore the printing process is guaranteed to be stably carried out, and the problems that in the prior art, printing patterns are possibly interrupted, or micro-tubes are blocked are solved.

The invention provides a dedusting hopper for a feeding port. The hopper includes a hopper frame, a lower hopper, a pulse dedusting chamber, a fan, a climb ladder, an upper hopper, an air compressor and an electronic control device, wherein the lower hopper, the upper hopper and the climb ladder are all arranged on the hopper frame; the pulse dedusting chamber is arranged on the outer periphery, above the lower hopper, of the upper hopper, and the upper hopper, the pulse dedusting chamber and the lower hopper are connected integrally; an inner platform is arranged between the upper hopper and the lower hopper. According to the dedusting hopper, the lower hopper is used as the dust collecting hopper of the pulse dedusting chamber so as to solve the problem that it is inconvenient to directly feed from the dust collecting hopper; by arranging the inner platform, the replacement and installation of a dedusting cloth bag and a cloth bag cage inside the pulse dedusting chamber can be completed inside the pulse dedusting chamber, which greatly saves the replacement time and reduces the labour intensity; the dedusting hopper has the advantages of a simple structure, easy installation, a good dedusting effect, convenient maintenance and installation, low operation costs, stronger practicality and more convenience.

The invention discloses a rainfall measuring system based on a pressure sensor. The system comprises a pressure sensor, a signal processing module, an AD conversion module, a temperature measurement module, a main controller, and a wireless transmission module. The pressure sensor converts a collected rainfall pressure signal into a voltage signal, and the voltage signal is amplified and filteredby the signal processing module and then sent to the main controller for calculation. After the calculation of the rainfall, the signal is wirelessly transmitted to the computer for storage and display. The rainfall is converted into a voltage through the pressure sensor, so there is no need of physical collection of the rainfall, thereby avoiding the errors caused by problems of rainfall evaporation, overflow, blockage and the like, and improving the measurement precision.

The invention discloses a high-efficiency impact-resistant air floatation system which mainly comprises a coagulation area, a first flocculation area, a second flocculation area and a mud-water separation area; a first stirring device, a second stirring device and a third stirring device are respectively arranged in the coagulation area, the first flocculation area and the second flocculation area; the mud-water separation area comprises a dissolved air floating area, a settlement area, a floating slag area and a clear water area; a dissolved air release head is arranged in a position where the dissolved air floating area is adjacent to the second flocculation area; a mud scraper is arranged at the edge, close to the floating slag area, of the dissolved air floating area. The high-efficiency impact-resistant air floatation system disclosed by the invention has the benefits that under the situation of fluctuation of influent SS from dozens of mg / L to 1000 mg / L, the effluent quality isstable; the treatment load is high, the effluent quality is good and stable, and meanwhile, the dosage of a flocculating agent and the flocculation reaction time can be reduced.

The invention discloses a negative pressure sewage collecting process. The process comprises the following steps that S1, collecting wells are arranged, specifically, one collecting well is arranged in each rural household, and water inlet pipelines are arranged on the collecting wells correspondingly; S2, a negative pressure collecting tank is arranged, specifically, a collecting tank is arranged, a vacuum pump is arranged in the collecting tank, a plurality of negative pressure pipelines are arranged on the vacuum pump, negative pressure ports are formed in the collecting wells correspondingly, and each negative pressure pipeline extends into the negative pressure port of one corresponding collecting well; and S3, the negative pressure pipelines are paved, specifically, a zigzag laying mode is adopted on a gradient-free road surface, and a bag type vacuum pipeline paving mode is adopted on a continuous uphill road surface. The negative pressure sewage collecting process is good in practicability, the pipeline sealing performance is good, the sewage leakage and rainwater leakage phenomenon can be effectively avoided, the flow speed in the sewage pipelines is relatively large, sewage sedimentation and blocking phenomena can be reduced easily, and operation and management of a sewage collecting pipe network are facilitated.

The invention relates to a man-made board dry waste heat recycle method which includes the following steps: step one, dry tail gas discharged from a cyclone separator is driven by a hot end fan and flows through a tail gas filter, and therefore dust in the tail gas can be filtered; step two, an evaporation section flowing through a heat pipe exchanger is directly emptied when temperature of the evaporation section is reduced after heat exchange; step three, temperature of cold air driven by a cool end fan is raised after a condensation section of the heat pipe exchanger absorbs heat; and step four, the cold air is used as a material drying medium after being heated by a hot oil exchanger or as preheat air to be delivered to a boiler without entering into the hot oil exchanger. The man-made board dry waste heat recycle method has the advantages that a high-efficiency heat exchanger is used to recover waste heat in man-made board dry tail gas, in the process of heat exchange, heat exchange components are in a phase-change heat exchange state, heat exchange intensity is large, and therefore a great deal of low-temperature waste heat can be effectively recovered. A high-efficiency dust remover is arranged in front of the heat exchanger, and therefore the problems that the heat exchanger is prone to dust stratification and blockage and the like are solved.

A biotreating agent for treating life sewage is prepared from natural raw liquid of ferment, natural cleaning liquid, natural tuff powder, natural raw powder of ferment, environment protection type washing powder and Bacillus subtitis through respectively mixing them with enzyme preparation, detergent and oil decomposing powder, and mixing resultant 3 mixtures with water.

The invention discloses a continuous vacuum cooling crystallization device with lifting diversion, comprising a crystallization chamber, a guide cylinder, a lifting cylinder, a forced circulation agitator and a slurry reflux circulation system. The guide cylinder and the lifting cylinder are installed inside the crystallization chamber, the forced circulation agitator is installed at the bottom end of the crystallization chamber, and a slurry return tube of the slurry reflux circulation system communicates with the bottom of the crystallization chamber. A hot material enters from two hot material inlets at the bottom of the crystallization device, and conducts vacuumed flash evaporation in the vicinity of the liquid surface after being lifted in the lifting cylinder by the forced circulation agitator. After the flash evaporation, mother liquid and crystal nucleus enter the lower part of the crystallization chamber along the guide cylinder for crystal growth and development, and the bottom slurry reflux system forms a partial reflux of the slurry. The continuous vacuum cooling crystallization device with lifting diversion utilizes an internal lifting diversion structure to increasethe reaction residence time, solves problems in the conventional batch production that the production efficiency is low, the over-saturation cannot be effectively controlled, and an external circulation heat exchanger and a circulation pipe are easy to scale. At the same time, the solid content in the crystallization device is effectively maintained, the equipment operation is stable, and the cleaning cycle is prolonged.

The invention discloses a buffer memory management design and implementation method in an industrial internet of things. The method comprises the following steps: adopting an FPGA as a main controllerto complete SDRAM initialization and design of a main state machine; the SDRAM memory is divided into an index area and a data area, and in order to facilitate memory management, the SDRAM data areais further divided into 1KB memory blocks with the same size; and completing the design of a data processing module, a read-write index module, a read-write data module and an address control module in the memory management part. The method solves the unreliable problems of data disorder and the like caused by reading a plurality of data frames from an SDRAM (synchronous dynamic random access memory) when the industrial high-speed communication has traffic jam cache, and improves the stability of a communication system.

The invention discloses domestic wastewater discharge equipment capable of removing oil stains and silt. The equipment comprises a machine body, wherein a water storage cavity is formed in the upper side of the machine body, a working cavity is formed in the lower side of the water storage cavity, a supply pipe is arranged between the water storage cavity and the working cavity in a communicatingmode, a supply valve control cavity is formed in the right side of the supply pipe, and the right side of the supply valve control cavity is provided with a guide cavity. According to the domestic wastewater discharge equipment, the working cavity and the water storage cavity are separated, silt in sewage is settled through the gravity of the silt, oil stains are discharged out of the equipment through a reciprocating oil scraping plate firstly, and the residual garbage in the sewage after oil stain removal is filtered by a garbage filter screen and cleaned by a dirt removal scraper to preventa drainage pipe from being blocked. According to the invention, oil stain and silt in domestic sewage can be effectively removed, silt flowing into a sewer is reduced, and the problems of blockage and the like caused by long-term accumulation of the silt in the sewer can be effectively solved.

The invention discloses a turbine-pressure separation energy storage type engine pressurization system, and belongs to the technical field of engines. In the turbine-pressure separation energy storage type engine pressurization system, a storage battery, a rectification filter circuit, a generator, a turbine, an engine exhaust pipe, an engine, an engine intake pipe, an electric drive air compressor and a high power density direct current motor are in series connection; a thermoelectric conversion module group adsorbs to the outer wall of the engine exhaust pipe; an electric quantity detection module is arranged between the storage battery and a control module; an engine rotation speed sensor is arranged at the output end of the engine; an air inlet temperature sensor and an air inlet pressure sensor are arranged on the engine intake pipe; the engine rotation speed sensor, the air inlet temperature sensor and the air inlet pressure sensor are connected with the control module; and the storage battery, the rectification filter circuit and the high power density direct current motor are controlled through the control module. According to the turbine-pressure separation energy storage type engine pressurization system, the air inlet pressurization process of the engine is flexible and controllable through decoupling of the turbine and the air compressor, the problems of turbo lag during low rotation speed of an exhaust turbine mechanism, and blocking, surging and stalling of the air compressor during high rotation speed of the exhaust turbine mechanism can be solved, and surplus energy of exhaust gases under whole working conditions can be utilized more sufficiently through the turbine and temperature difference power generation.

The invention relates to a dedusting system for boiler flue gas desulfurization, in particular to a dedusting system for flue gas ammonia desulfurization. The invention also relates to a method for applying the dedusting system in an ammonia desulfurization system. The dedusting system comprises a desulfurizing tower, a slurry pump, a centrifugal machine, a clear liquid pool, a clear liquid pump, an electric control system and an evaporation concentration system, wherein the desulfurizing tower, the slurry pump, the centrifugal machine and the clear liquid pump positioned in the clear liquid pool are sequentially connected in series through a pipeline to form a closed loop, the centrifugal machine is connected with the electric control system, the centrifugal machine is also provided with a mud outlet, and the pipeline between the clear liquid pump and the desulfurizing tower is connected with the evaporation concentration system. By the dedusting system and an application method of the dedusting system, provided by the invention, the problems that in the existing ammonia wet-type desulfurization system, due to desulfurizing circulating solution contains the large ash content, a pump valve, a nozzle, a piping system and the like are seriously worn and blocked, and the like can be effectively solved, so that the ammonia wet-type desulfurization system can safely and stably operate, and the sulfur dioxide emission can reach the standard for a long time.

The invention discloses a tunnel construction water recycling system and belongs to the technical field of tunnel construction. The problems that sewage produced in tunnel construction is likely to pollute environment, and a large amount of waste is caused are solved. The system comprises a filtering sedimentation basin composed of primary filtering sedimentation areas and an ultimate filtering sedimentation area. The primary filtering sedimentation areas collect sewage for construction through a drainage system and comprise the first-level filtering sedimentation area, the second-level filtering sedimentation area and the third-level filtering sedimentation area. The first-level filtering sedimentation area, the second-level filtering sedimentation area, the third-level filtering sedimentation area and the ultimate filtering sedimentation area are each provided with a desilting opening and a mud removal opening and adjacently connected through filter openings. In each sedimentation area, the height of the corresponding desilting opening is smaller than that of the corresponding mud removal opening. Impurities in water for tunnel construction and underground water are removed through filtering and sedimentation, it is ensured that water for tunnel construction is recycled, and the problems of environment pollution, city sewage pipe blockage and the like caused by tunnel construction wastewater are solved.

The invention provides a double-fluid external mixing type nozzle based on high-pressure water. The double-fluid external mixing type nozzle comprises a slurry pipe and multiple high-pressure water pipes. The high-pressure water pipes are arranged outside the slurry pipe in parallel and are evenly distributed in the circumferential direction of the slurry pipe. A slurry nozzle body is formed at the tail end of the slurry pipe. The tail ends of the high-pressure water pipes incline in the axis direction of the slurry pipe and are provided with high-pressure water nozzle bodies. The extending lines of the high-pressure water nozzle bodies intersect with the extending line of the slurry nozzle body. After high-pressure water flow in the high-pressure water pipes is sprayed out obliquely from the high-pressure water nozzle bodies, the high-pressure water flow collides with slurry sprayed out from the slurry nozzle body outside the nozzle, and the slurry is broken and atomized into small slurry drops under the colliding and shearing effects of the high-pressure water flow. The double-fluid external mixing type nozzle based on high-pressure water is particularly suitable for the supercritical water gasifier technology and has the beneficial effects of being good in anti-blockage performance, resistant to corrosion and high temperature and the like.

The invention discloses a water purifying device which comprises a front filtering system, a reverse osmosis device behind the front filtering system, a rear filtering device connected with a water outlet, a waste water channel connected between the front filtering system and the rear filtering device and provided with a waste water valve capable of controlling the flow rate, a first detecting device connected with a water inlet, a second detecting device arranged on the waste water channel and used for detecting the water quality so as to control the opening degree of the waste water valve, and a controller connected with the first detecting device and the second detecting device. According to the water purifying device, the prediction of the service life of a filter element and the switching of the flow of waste water can be conducted according to the real-time water quality, the problems that the waste of the filter element, the waste of water resources, the blockage of the water system and the like are solved, the filter element is sufficiently used, the reverse osmosis device is protected and sufficiently used, and water resources are further saved.

The invention discloses a coal mine underground gas pumping and purifying system. The coal mine underground gas pumping and purifying system comprises a circulating pumping system and a purifying heatexchange system; the circulating pumping system comprises an overground gas inlet system and an underground gas exhaust system; the ground gas inlet system comprises an air feeder, a gas inlet pipeline and a gas inlet branch pipe which are arranged on the ground; the underground gas exhaust system comprises an air blower, a gas exhaust pipeline and a gas exhaust branch pipe which are arranged onthe ground; the gas inlet pipeline and the gas exhaust pipeline are both vertically and fixedly arranged in a soil layer through fixing lugs; the gas inlet branch pipe and the gas exhaust branch pipeare both arranged at the top of a mine through fixing sleeves; and the purifying heat exchange system comprises a hydrocarbon refrigerant storage tank, a hydrocarbon refrigerant circulating pump, a heat exchanger, a circulating water cooler and a circulating water cooling area. An original circulating device is replaced with a hydrocarbon refrigerant medium, so that the problems that the evaporation capacity is large, and a channel of the heat exchanger is blocked are solved; and gas in the mine is directly and preliminarily filtered and purified, the safety of constructors under the mine is guaranteed, a power source is arranged on the ground for facilitating maintenance, and thus safety is better realized.

The invention discloses a near-field radiation solar evaporator capable of continuously desalting seawater and synchronously recovering salt, and belongs to the technical field of seawater treatment by utilizing renewable energy sources. According to the near-field radiation solar evaporator, a light-transmitting heat-insulating layer, a full-spectrum absorption and infrared radiation photo-thermal converter, a radial mass transfer evaporation disc and supporting foam are sequentially fixed to a heat-insulating supporting pipe from top to bottom; the heat insulation supporting pipe is vertically fixed to the center of the collecting disc. The longitudinal mass transfer capillary pipette is directly connected with the evaporation disc; the full-spectrum absorption and infrared radiation photo-thermal converter is fixed at the bottom of the light-transmitting thermal insulation layer; and the salt crystallization product collecting tray plays a role in collecting crystallization products and supporting the whole device. Solar energy is converted into heat energy to drive efficient phase change evaporation by utilizing the principles of photo-thermal conversion and near-field radiation, the problem of surface scaling and blockage of the photo-thermal converter is effectively avoided in the physical mechanism, continuous clean water production and synchronous salt recovery are realized, and the method has important significance on construction of a renewable energy source system.

The invention provides a device for homogenizing flue gas velocity at an ammonia spraying cross section in a denitration flow field. The device includes a connecting flue from a coal economizer outletto an SCR reactor inlet. The connecting flue includes an equal-cross-section advection section, a variable-section advection section, a turning chamber, a rising section, and a section from the top of the rising section to the SCR reactor inlet. The flow field of the connecting flue from the coal economizer outlet to the SCR reactor inlet is effectively optimized, and in particular, flue gas flowing at the ammonia spraying cross section of the rising section is effectively improved, thus homogenizing flue gas velocity at the ammonia spraying cross section in the denitration flow field, and making the relative standard deviation of flue gas velocity distribution small, and therefore, the difficulty in adjusting adjustable ammonia spraying grids in an ammonia spraying zone is reduced, consistency of the ammonia-nitrogen ratio of the ammonia spraying cross section is improved, and further problems that ammonia escape of an SCR denitration device is high, a downstream air pre-heater is blocked with ammonium bisulfate, and the like which are caused by nonuniform distribution of the ammonia-nitrogen ratio can be solved.