1146 results about "Polluted environment" patented technology

The invention discloses a complex water body pollution detection method and system based on an adaptive cruise technology, and belongs to the technical field of environment monitoring. The method overcomes the inherent defect that an existing monitoring scheme based on a static preset path cannot adapt to a dynamic pollution environment by constructing a closed-loop feedback control architecture of real-time sensing, central decision making and dynamic execution. Generating initial global pollution distribution estimation and planning an initial path by the main aircraft; the subordinate vehicle sails along the path and estimates the local pollution concentration and the gradient direction in real time; and the main aircraft fuses all data to update global estimation, and dynamically generates an instruction for guiding the subordinate aircraft to move towards a pollution concentration gradient rising direction after identifying a pollution plume or a hot spot, thereby realizing active tracking and high-resolution surveying and mapping. According to the invention, the efficiency, precision and intelligent response capability of pollution monitoring are significantly improved, and accurate and adaptive tracking of a dynamic pollution field is realized.

The invention relates to the technical field of transformers, in particular to an oil-immersed power transformer which comprises a hollow rod, a first round rod, a first piston, a first spring, a cylinder, a second round rod, a second piston, a limiting block and a ventilation assembly. A hollow rod is fixedly connected to the diaphragm; a first round rod is slidably connected to the hollow rod. A first piston is fixedly connected to the first round rod and makes contact with the lower end of the hollow rod. A cylinder is fixedly connected to the box body; through cooperation of the hollow rod, the first round rod, the first piston, the first spring, the cylinder, the second round rod, the second piston, the second spring and the limiting block, pressure relief operation can be automatically completed when pressure in the transformer body is increased abnormally, and therefore the transformer body can be protected; and the transformer oil sprayed out at a high speed can be intercepted and prevented from being sprayed to the outside to pollute the environment, the intercepted transformer oil is gathered on the upper side of the diaphragm, manual collection of the transformer oil can be facilitated, and waste is avoided.

The invention provides a preparation method of 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride, which comprises the following steps: salifying 4-fluoro-3, 5-dimethylaniline serving as a substrate with concentrated hydrochloric acid, reacting with sodium nitrite to prepare a diazo solution, reducing the diazo solution into corresponding phenylhydrazine by using alkaline sodium sulfite as a reducing agent system, and reacting the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride with the diazo solution to prepare the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride. And acidizing the 2, 5-dimethyl phenylhydrazine to obtain corresponding phenylhydrazine hydrochloride. According to the preparation method, sodium sulfite which is low in cost and easy to obtain is used as a reducing agent, the defects that metal residues are high, the environment is prone to being polluted and the raw material cost is high due to the fact that a metal reducing agent is adopted when phenylhydrazine hydrochloride is prepared in the prior art are overcome, the reaction is completed in a water phase, no organic solvent is adopted, and the concept of green chemistry is met; and the problems of complicated post-treatment and easy pollution caused by the adoption of an organic solvent can be effectively avoided.

The utility model discloses a biosafety cabinet capable of double-layer filtration, which comprises a cabinet body, an operation chamber is arranged in the cabinet body, and a bottom air duct is arranged at the bottom end of the operation chamber. By arranging the reducing pipe, the exhaust pipe, the exhaust outlet, the filter box, the exhaust filter, the air disc and the high alcohol, double-layer filtration of exhausted air is achieved, air can be exhausted into the reducing pipe through operation of the exhaust fan, airflow can be concentrated and pressurized through arrangement of the reducing pipe, meanwhile, the air is conveyed into the filter box, and the filtering effect is improved. The air disc divides air into a plurality of small bubbles and increases the contact area with the high-alcohol, the high-alcohol can kill bacteria in the air and adsorb particle dust and various suspended solids, then the air is conveyed into the air exhaust opening, secondary filtering is conducted when the air passes through the air exhaust filter, and the exhausted air is purified; therefore, the exhausted air does not carry germs, the environment is prevented from being polluted, and the use safety is improved.

The invention discloses a Gordonia ovorans YDY-4 strain and an application of the Gordonia ovorans YDY-4 strain in degradation of n-hexadecane. The cholesterol-eating Gordonia sp. YDY-4 is named as the cholesterol-eating Gordonia sp. YDY-4, is preserved in the China Center for Type Culture Collection (CCTCC), and has the preservation number of CCTCC M 20251290, and the cholesterol-eating Gordonia sp. YDY-4 is named as the cholesterol-eating Gordonia sp. YDY-4 and is preserved in the China Center for Type Culture Collection (CCTCC). The Gordonia ovorans YDY-4 provided by the invention has the capability of degrading n-hexadecane under the condition that the pH (Potential of Hydrogen) is 7.0 to 9.0, and can grow at 28 to 32 DEG C. The Gordonia ovorans YDY-4 provided by the invention has relatively strong environmental adaptability and n-hexadecane degradation capability, and provides a basis for bioremediation of petroleum polluted environment and application of a microbial enhanced treatment technology.

The invention relates to the technical field of civil air defense building ventilation equipment, in particular to efficient-purification and self-cleaning civil air defense building ventilation opening protective door equipment which comprises a door frame, a door body, a driving unit, a sensing system, a purification device, a self-cleaning execution unit and a control unit. The sensing system comprehensively collects environment and equipment data, and the control unit adopts a weighted fusion algorithm to calculate a comprehensive pollution index and determine a pollution level; the protection and ventilation efficiency coefficients under different door body opening and closing angles are calculated based on fluid analogue simulation; dynamically solving the optimal opening and closing angle of the door body and the optimal operation parameters of the purification device through a multi-objective optimization algorithm; and the self-cleaning effect is intelligently triggered and verified according to the filter screen state and the pollution level. Self-adaptive intelligent regulation and control of the protective door in a complex pollution environment are achieved, the safety protection and ventilation efficiency is effectively balanced, and the purification capacity and the automatic maintenance level are improved.

The invention discloses a liquid treatment agent for red mud harmless treatment and a preparation method thereof.The liquid treatment agent comprises a treatment agent A and a treatment agent B. The treatment agent A is formed by mixing hydrochloric acid and sulfuric acid, and the treatment agent B is prepared from malic acid, acetic acid, phthalic acid monoester, a solvent and an adsorbent, the mass fraction of the malic acid is 20%-40%, the mass fraction of the acetic acid is 20%-40%, the mass fraction of the phthalic acid monoester is 15%-25%, the mass fraction of the solvent is 5%-15%, and the mass fraction of the adsorbent is 5%-15%. The red mud is subjected to primary treatment by using the liquid treatment agent A, and then the red mud subjected to primary treatment is treated again by using the liquid treatment agent B, so that the alkalinity of the red mud can be effectively reduced, and various heavy metals, fluorides, radioactive elements and trace toxic elements in the red mud can be effectively removed; the environment pollution caused by the loss of the harmful substances is avoided, so that the innocent treatment of the red mud is realized.

The invention belongs to the technical field of environment detection, and particularly relates to atmospheric pollution environment governance detection equipment which comprises a mounting rod, a detection device is mounted at the top end of the mounting rod, a control box is mounted in the middle of the mounting rod, a rotating sleeve sleeves the top end of the mounting rod, and a supporting rod is fixed to one side of the rotating sleeve. A connecting plate is rotationally connected to the side, away from the rotating sleeve, of the bottom end of the supporting rod, a photovoltaic panel is fixed to the bottom end of the connecting plate, rotating plates are rotationally connected to the two sides of the rotating sleeve, and transmission assemblies are arranged below the rotating plates; the wind blows the photovoltaic panel to drive the rotating plate to rotate through the transmission assembly, and the rotating plate drives the protective shell to be closed. The photovoltaic panel is blown by wind power, and the photovoltaic panel drives the protective shell to be closed to cover the detection device, so that the outside of the detection device is protected, and the detection device can be prevented from being damaged due to inaccurate data caused by detection in extreme weather or being smashed by an object in airflow.

The dressing change device comprises a liquid collecting container, lifting rods are arranged on the left side and the right side of the interior of the liquid collecting container respectively, guide rods which are transversely arranged are arranged at the tops of the lifting rods, the two guide rods are sleeved with moving sleeve pieces which can move along the guide rods respectively, and a leg supporting plate is detachably installed between the two moving sleeve pieces; a flow guide assembly is movably connected below the leg supporting plate and comprises a flow guide plate, a flow guide cavity is formed in the top of the flow guide plate, a flow guide hole is formed in the bottom face of the flow guide cavity, a funnel is connected to the bottom of the flow guide hole, and a flow guide pipe is arranged at the bottom of the funnel. According to the device, liquid medicine and sewage can be drained into the basin, sputtering is reduced, and environment pollution is prevented.

The invention discloses a preparation method of recombinant catechol-2, 3-dioxygenase and an application of the recombinant catechol-2, 3-dioxygenase. According to the invention, a novel catechol-2, 3-dioxygenase group C23O927 is identified from a constructed metagenome library, and the catechol-2, 3-dioxygenase group C23O927 is a key enzyme for catalyzing degradation of polycyclic aromatic hydrocarbon pollutants. A C23O927-pET32a (+) recombinant expression vector is constructed and converted into host bacteria, heterologous expression of target protein is achieved, and the prepared recombinase belongs to acid enzymes and has good resistance to high temperature, acid, alkali, high-concentration metal ions, organic solvents and surfactants. The recombinase provided by the invention can be used in an acidic environment, has very good enzymatic activity, can catalytically degrade various catechol compounds, can be better used for treating polycyclic aromatic hydrocarbon polluted environments, and has important significance for developing more products which can tolerate various extreme environments and efficiently catalyze degradation of polycyclic aromatic hydrocarbons.

The utility model discloses an integrated collection device for waste oil in a laboratory, and belongs to the technical field of waste oil collection and treatment. The turning cover is rotationally connected to the funnel; the mesh screen is detachably connected in the funnel; the diversion pipe is in threaded connection with the bottom of the funnel; the connecting plate is in threaded connection with the connecting ring; the breather pipe is fixedly connected to the connecting ring; according to the utility model, the funnel is fixedly arranged on the waste oil collecting barrel through the device, so that the funnel does not need to be taken down to seal the cover, on one hand, the problem that oil is easy to drip when the funnel is taken out is solved, and on the other hand, the problem that a barrel cover is difficult to open by a single hand when a worker pours round-bottom glass instruments such as a distillation flask and a test tube in the prior art is solved; meanwhile, through the turning cover arranged on the funnel, the problem that in the prior art, waste oil remaining on the funnel is prone to volatilizing and polluting the environment is solved.

The invention discloses pseudoumen and an application of the pseudoumen in polluted environment treatment. According to the invention, a strain of pseudoumen pseudomonas 25S0261-4 is separated from soil and is gram negative bacillus, the optimal growth temperature of the strain 25S0261-4 is 20-40 DEG C, and the optimal pH range is 5-9. Researches show that the strain 25S0261-4 has a good phosphorus-solubilizing characteristic, and can be used as a phosphorus-solubilizing bacterium for increasing the phosphorus content in soil and improving the soil fertility. The 25S0261-4 strain has an efficient degradation effect on PBAT, the degradation effect of PBAT can be further improved when the 25S0261-4 strain is combined with earthworms for treatment, and it is shown that the earthworms can cooperate with the 25S0261-4 strain to degrade PBAT, be used for treating plastic polluted environments and degrading plastic pollutants in soil and have important significance on improving soil quality and degrading the plastic pollutants.

The invention discloses a method for detecting ash clogging and removing clogging by using gravity. Ash blocks formed by an ash deposition plate in an evaporator ash hopper fall off to block an ash hopper discharging port or a bin pump, equipment operation needs to be stopped irregularly, a manhole door needs to be opened, and the bin pump needs to be disassembled for cleaning, so that the environment is easily polluted due to ash leakage. The method comprises the following steps that an inserting rod is pulled out, the left hand holds a left square sleeve of a left stirring rod, the right side holds a right square sleeve of a right stirring rod, the left stirring rod is rotated clockwise, and the right stirring rod is rotated anticlockwise, so that the left stirring rod and the right stirring rod can stir extruded ash blocks to beat the ash blocks into small ash blocks; small ash blocks formed by beating can smoothly enter the blanking pipe through the ash filtering frame, so that the blockage is dredged, and the whole height is increased to the initial position under the action of the spring after dredging is completed. The device is used for detecting and cleaning the accumulated dust blockage of the dust hopper.

The invention relates to a preparation method of molybdenum-lanthanum alloy powder, belongs to the technical field of metallurgy, and solves at least one of the following problems in an existing method: (1) the particle size is not easy to refine; (2) doping elements are not uniformly distributed; (3) ammonia gas is generated to pollute the environment; and (4) the process is complex. The preparation method comprises the following steps: (1) mixing a peroxymolybdic acid solution with a lanthanum compound, evaporating, crystallizing and roasting to obtain a molybdenum-lanthanum alloy powder precursor with a needle-like crystal structure; and (2) hydrogen reduction is conducted on the molybdenum-lanthanum alloy powder precursor twice, and the molybdenum-lanthanum alloy powder is obtained. According to the method, the particle size of the molybdenum-lanthanum alloy powder can be refined, the lanthanum element can be more evenly distributed in the alloy, the situation that the environment is polluted due to the fact that ammonia gas is generated in the preparation process of the molybdenum-lanthanum alloy is avoided, and the material mixing technology is relatively simple and suitable for large-scale production.

The natural gas compressor external leakage gas oil mist recovery device disclosed by the application comprises an outer cylinder, a filtering device is arranged in the outer cylinder, a bottom plate is arranged at the bottom opening of the outer cylinder, an oil mist inlet pipe is connected to the bottom plate, and a wind cap is arranged at the top opening of the outer cylinder. The natural gas compressor external leakage gas oil mist recovery device is safe and environmentally friendly, simple in structure, capable of continuously discharging waste gas while effectively recovering oil mist, and capable of eliminating the risk of oil spilling from the emptying opening of the waste oil tank to pollute the environment.

The invention relates to a system and a treatment method for recycling treated grease vinasse refining wastewater, relates to the technical field of grease wastewater treatment, and aims at treating grease wastewater generated in a grain and oil production process. According to the system, sewage sequentially passes through an oil separation sedimentation tank, a water collecting well, an adjusting tank, an air flotation sedimentation tank, a hydrolysis acidification tank, a biological contact oxidation tank, an MBR membrane tank, a disinfection tank, a precision filter, an ultrafiltration membrane system, a water production tank, a reverse osmosis device and a reuse water tank; sewage is subjected to multiple treatments, efficient treatment and resource utilization of grease wastewater are achieved, generated intermediate wastewater flows back to be repeatedly treated, wastewater treatment agents are repeatedly used, environment pollution caused by emission is avoided, clear liquid discharged by a sedimentation tank can be activated, backflow wastewater and newly-fed wastewater are fully mixed, and the wastewater treatment efficiency is improved. The method has the effect of homogenizing and homogenizing, and the difficulty of follow-up treatment is reduced.

The utility model relates to the technical field of air-conditioning system leak detection, in particular to an air-conditioning system leak detection disinfection spare port structure, which comprises a fixing assembly and a pipeline body, the fixing assembly comprises a first bolt and a fixing disc, the fixing disc is provided with a first through hole, and the outlet end of the pipeline body is provided with a first control valve. A second control valve and a quick connection chuck are arranged at the inlet end of the pipeline body, a fourth control valve is arranged in the middle of the pipeline body, a hole with the diameter being 50 mm needs to be formed in the rear outer side of a humidifying section of the air conditioning unit before use, and then the pipeline body is installed at the hole through a fixing assembly; when high-efficiency leak detection is needed, only the heat fuming pipe and the pipeline body need to be connected through the quick connection chuck, and high-efficiency leak detection can be carried out in a clean area by starting heat fuming equipment. In this way, the air conditioning unit does not need to be shut down, environment pollution caused by oil leakage of equipment is avoided, and meanwhile the newly-added standby port can be connected with ozone equipment and other sterilization equipment for use.

The utility model discloses a cooling liquid diversion protection clamp in cutter machining, which comprises a base, the base is connected to a machining table through screws, the upper end face of the base is fixedly connected with a positioning piece, the positioning piece is connected with a clamping supporting piece, the top of the clamping supporting piece is provided with a clamping pressing piece, the top of the clamping supporting piece is provided with a first V-shaped groove, and the clamping pressing piece is provided with a second V-shaped groove. The clamping and pressing piece comprises a top plate, screws and a pressing block, a second V-shaped groove is formed in the bottom of the pressing block, the clamping and supporting piece is provided with a protective cover, the base is of a cavity structure, a through groove is formed in the edge of the bottom, a liquid return pipe is inserted into one end of the base, a supporting seat is fixed to the bottom, and the clamping and supporting piece is connected with the positioning piece and the top plate in a matched mode through the screws and clamping grooves. A guide groove is formed in the first V-shaped groove, and the screw is rotationally connected with the lower pressing block through a rotating base. And rotation interference of the lower pressing block is avoided, the clamping precision is improved, the cooling liquid recycling function is achieved, machining liquid is prevented from overflowing to pollute the environment, and meanwhile the use safety is improved through a protective cover.

The application discloses a kind of circuit board processing equipment and method, including wax sealing machine and smoke exhaust unit;Smoke exhaust unit includes exhaust unit, filter box, atomizer, sponge and auxiliary fan;Exhaust unit is set in the top of wax sealing machine;Filter box is set in the side of wax sealing machine, filter box has clean water, the end of exhaust unit extends into filter box and dips below clean water liquid level, exhaust unit is used to introduce air in wax sealing machine into filter box;Atomizer is set on the side wall of filter box, atomizer is used to spray water mist into filter box;Sponge is set in the top of filter box;Auxiliary fan is set in the upper portion of sponge, auxiliary fan is used to discharge gas in filter box.The application avoids that vaporized wax is diffused and inhaled by staff or attached on equipment, solves the problem that traditional smoke exhaust unit pollutes environment, filter screen is difficult to clean and use cost is high.

The utility model discloses a protective bib used after tracheostomy. The protective bib used after tracheostomy comprises a bib body, a scarf and a pocket, wherein the scarf and the pocket are connected with the bib body. A through hole for avoiding the trachea cannula is formed in the neckerchief; the pocket is provided with an opening; the bib bag is connected with the bib body through the rotary connecting device, so that an opening of the bib bag faces upwards. According to the tracheal cannula, the scarf can be fixed to the neck of the patient, the through hole in the scarf corresponds to the tracheal incision of the patient in position, interference between the scarf and the tracheal cannula is avoided, and the scarf can prevent sputum from infiltrating the skin and the tracheal cutting dressing. The bib body is located on the chest and the abdomen of a patient, liquid such as sputum and medicine is prevented from wetting or polluting clothes, the liquid flows into the bib bag along the surface of the bib body under the action of self weight to be collected, and environment pollution is avoided. When the patient moves or changes in the lying position, the pocket is rotated and the position of the pocket is adjusted, so that the opening of the pocket faces upwards, and the situation that the opening of the pocket faces downwards or the pocket inclines to spill liquid in the pocket is avoided.

The invention relates to the technical field of moxibustion, and discloses a reed pipe moxibustion device facilitating moxa replacement, which comprises a pipe body, a filling mechanism and a supporting mechanism, the filling mechanism comprises a shell and a disc filling bin, the supporting mechanism is fixedly connected to the bottom of the shell, a cavity is formed in the shell, and a mounting pipe is arranged on one side, close to the pipe body, of the shell; one end of the pipe body is connected into the mounting pipe in a sealed mode, the mounting pipe is communicated with the cavity, the disc filler bin is rotationally arranged in the cavity, the rotating axis of the disc filler bin is parallel to the mounting pipe, and a plurality of filler cavities used for being filled with moxa are formed in the disc filler bin; when the disc packing bin is rotated to enable one of the packing cavities and the mounting pipe to be located on the same straight line, the packing cavities communicate with the mounting pipe, a ventilation opening is formed in the side, away from the mounting pipe, of the shell, and the ventilation opening communicates with the packing cavities. The problems that in the prior art, ash is prone to scattering and splashing in the down changing process, the environment is polluted, and the cleaning difficulty is increased are solved.

The utility model discloses drilling equipment for processing a ventilating duct, which comprises a base, the top of the base is fixedly connected with a support frame, the surface of the support frame is provided with a three-jaw chuck, and a rotating shaft of the three-jaw chuck penetrates through the support frame and is driven by a rotating motor. Through cooperation of the base, the three-jaw chuck, the sliding frame and the clamping block, the ventilation pipeline can be clamped, the ventilation pipeline can be driven to rotate automatically according to actual requirements, and then through cooperation of the movable frame, the bearing plate, the electric telescopic rod, the top plate and the drilling machine, the drilling machine can be transversely moved according to actual requirements; according to the drilling device, the surface of the ventilation pipeline can be drilled, at the moment, the drilling area can be covered through cooperation of a sliding column, a lifting block, a protection frame, a limiting groove and a limiting strip, and therefore chippings generated during drilling can be prevented from splashing everywhere, and the situation that the chippings pollute the environment can be reduced.

This invention discloses an aquatic microbacterium and its application in the degradation of atrazine. The aquatic microbacterium is named *Aquamicrobium lusatiense* HR8, with accession number CGMCC No. 28916. This invention also discloses a microbial agent comprising the aquatic microbacterium, a method for culturing the aquatic microbacterium, and a method for degrading triazine herbicides. This invention is the first to disclose the use of *Aquamicrobium* to degrade atrazine. Aquamicrobium HR8 achieved a 100% degradation rate of 200 mg / L atrazine in 48 hours. Its application in the bioremediation of atrazine-contaminated environments can overcome the current shortcomings of poor atrazine bioremediation and removal efficiency, while simultaneously reducing secondary pollution to the environment.

The invention relates to the technical field of organic matter purification, in particular to an NMP (N-Methyl Pyrrolidone) extraction method for reaction kettle waste liquid, which comprises the following specific steps: introducing the reaction kettle waste liquid into filter pressing equipment for filter pressing to obtain kettle residual pressure filtrate; adding the kettle residual pressure filtrate and an extracting agent into a stirring tank, uniformly stirring, and then introducing into a liquid separation tank for liquid separation to obtain an extracting solution; carrying out primary rectification on the extract liquor, distilling off an extracting agent and water from the top, layering the extracting agent and water in a phase separation tank, partially refluxing the extracting agent to a primary rectifying tower, carrying out primary distillation on the extract liquor at the kettle bottom temperature of 140-150 DEG C and the tower top temperature of 110-115 DEG C, and recycling until the extraction rate is greater than or equal to 85%; and carrying out second distillation at the kettle bottom temperature of 115-120 DEG C and the tower top temperature of 110-115 DEG C to obtain the NMP with the purity of more than or equal to 99%. According to the method, the kettle residue pressure filtrate is subjected to extraction, primary rectification and secondary rectification, so that N-methyl pyrrolidone in kettle residues can be efficiently purified, the production cost is remarkably improved, and environmental pollution caused by improper disposal is avoided.

The utility model relates to the technical field of garbage disposal, in particular to a community household garbage separate collection device which comprises a protection box, a plurality of guide plates are obliquely arranged on the protection box at equal intervals in a penetrating mode, and garbage cans are arranged on the protection box below the bottom end of each guide plate. A waste liquid barrel is arranged on the portion, on one side of each garbage can, of the protection box, a plurality of liquid leakage holes are formed in the portion, above each waste liquid barrel, of the material guide plate in a penetrating mode, the multiple material guide plates are jointly provided with a blocking mechanism, and the blocking mechanism is fixed to the protection box. When the garbage can is used and garbage is collected, soup and solid garbage are separated, and when a garbage truck is used for transferring, waste liquid in the waste liquid barrel exists independently, so that the situation that sour and smelly waste water falls on the road surface where the garbage truck passes can be greatly reduced, and the environment pollution area is reduced.

The utility model discloses an electrolytic tank anode guide rod sealing device relates to aluminium electrolytic tank technical field. Including base, pressure assembly, insulating block subassembly and sealing washer, sealing washer is located electrolytic tank slot eyebrow on and is clamped on anode guide rod, base is fixed on electrolytic tank and is located sealing washer one side, insulating block subassembly is U type frame, and the corresponding sleeve is clamped outside sealing washer, and insulating block subassembly includes first insulating block, second insulating block and fastener, and second insulating block sets up at first insulating block both sides and can move along first insulating block axial direction, and first insulating block with second insulating block between through fastener fixed, pressure assembly is elastic part, sets up between base and insulating block subassembly, is used to provide spring force and makes insulating block subassembly to sealing washer pressure tight. The utility model discloses through increasing sealing tool on the slot eyebrow, has prevented the gap between anode and slot eyebrow, sealing cover and caused flue gas leakage to pollute the environment, avoids flue gas to invade the health problem of on -the -spot operator's body.

The utility model discloses a countercurrent absorption device for sulfurous acid, which consists of a process water pipe, a tail gas fan, a third-stage absorption tower, a second-stage absorption tower, a shower nozzle, a first-stage absorption tower, a finished product acid pump, a sulfur furnace, a circulating acid pump and a baffle plate. According to the sulfur dioxide absorption tower disclosed by the invention, the problems that sulfur dioxide gas is not thoroughly absorbed and tail gas pollutes the environment in a sulfurous acid preparation process are solved by adopting countercurrent absorption of the flow direction of sulfur dioxide gas and the flow direction of process water and adopting an absorption mode of combining a shower nozzle and baffle plate water distribution; the sulfur dioxide gas absorption efficiency is high, and equipment and power energy are saved.

The utility model relates to the technical field of zinc oxide production, in particular to a furnace ash filtering and recycling structure for zinc oxide production, which comprises a box door, a collecting device is mounted at the rear end of the box door through a hinge, supporting legs are fixedly connected to four corners of the lower end of the collecting device, and a box cover is mounted at the rear part of the upper end of the collecting device through a hinge. A side plate is fixedly connected to the upper portion of the right end of the collecting device, a main body device is fixedly connected to the right portion of the lower end of the side plate, a linkage plate is fixedly connected to the upper portion of the outer surface of a fixing rod, a filtering assembly is fixedly connected to the other end of the linkage plate, and the driving motor is fixedly connected to the right portion of the lower end of the side plate. According to the stove ash filtering and recycling structure for zinc oxide production, reusable components in stove ash can be effectively recycled, resource waste is avoided, harmful substances can be prevented from polluting the environment, and the requirements for environmental protection and production are met.

The utility model discloses surface spraying equipment for storage tank machining, and belongs to the technical field of storage tank surface spraying. Surface spraying equipment for storage tank machining comprises a mounting seat fixedly mounted on a supporting component, a connecting pipe is fixedly mounted on the mounting seat, a plurality of spray heads are arranged on the connecting pipe at equal intervals, a plurality of nozzles are annularly mounted at the spraying ends of the spray heads at equal intervals, pressurizing cavities are formed in the spray heads, and the pressurizing cavities are communicated with the connecting pipe. A connecting cavity is formed in the spray head, and the connecting cavity is communicated with the nozzle; a splash-proof part is fixedly mounted on the nozzle and is used for intercepting splashed paint; the spray nozzle and the splash-proof part are used in cooperation with the spray head, the air nozzle can form an air wall after the splash-proof part works, splashing paint is effectively intercepted, and the situation that excessive paint is left in air and pollutes the environment is avoided.

The application discloses a barrel cover structure capable of realizing internal and external pressure balance, an oil storage barrel and an outdoor heat supply and power generation device, and belongs to the technical field of barrel cover structures. The bidirectional ventilation structure of the conventional straight-through oil tank is prone to oil leakage when being tilted, has a safety hidden danger, continuously volatilizes oil gas, wastes fuel and pollutes the environment. The barrel cover is provided with a central opening; a valve sleeve of a one-way valve core is inserted into the central opening and can slide in the axial direction; a sealing ring is sleeved outside the valve sleeve and located between the valve sleeve and the upper end surface of the barrel cover body; a second pressing spring is located inside the oil storage barrel and sleeved outside the valve sleeve, and is used for moving the valve sleeve to the sealing ring and pressing the sealing ring to realize sealing; an air inlet channel is formed in the valve sleeve and penetrates the atmosphere and the inside of the oil storage barrel in the length direction; a rubber valve and a first pressing spring are sequentially assembled in the air inlet channel from top to bottom, and a plug is installed at the bottom of the valve sleeve; and the first pressing spring is used for pressing the rubber valve to block the air inlet channel.