17results about How to "Low oxygen" patented technology

The application discloses a power plant multi-source waste heat collaborative recovery system and method based on slurry flashing, and relates to the technical field of energy saving of thermal power plants. The system comprises a flue gas waste heat recovery unit, a deaerator exhaust waste heat recovery unit and a continuous drainage waste heat recovery unit. The flue gas waste heat recovery unit comprises a flashing tank, a slurry inlet and outlet of the flashing tank are connected with a desulfurization tower, and a steam exhaust outlet of the flashing tank is connected with a steam collecting cylinder. The deaerator exhaust waste heat recovery unit comprises a deaerator, a deaerator steam exhaust heat exchanger and a condensate tank which are connected in sequence, and the condensate tank is connected with the flashing tank. The continuous drainage waste heat recovery unit comprises a continuous drainage flashing tank and a continuous drainage multi-stage flashing tank, and a steam exhaust outlet of the continuous drainage multi-stage flashing tank is connected with the steam collecting cylinder. The application collaboratively optimizes and recovers waste heat from different sources, effectively improves the recovery efficiency of waste heat, reduces the corrosion risk of equipment, and realizes full recovery of continuous drainage.

The application discloses a method for preparing biofuel by low-temperature dechlorination of waste PVC and coupling biomass co-pyrolysis, which comprises the following steps: drying, crushing and screening waste PVC, and then performing low-temperature dechlorination in an inert atmosphere, wherein the carrier gas is inert gas, the dechlorination temperature is 340-380 DEG C, the dechlorination time is 20-40 min, and dechlorinated PVC is obtained; crushing and drying the dechlorinated PVC, and then mixing the dechlorinated PVC with biomass at a mass ratio of 0.1-10:1, and then heating and pyrolyzing at 500-700 DEG C for 20-40 min to obtain biofuel. The method achieves good dechlorination effect through step-by-step pyrolysis, and improves the quality of biofuel; the method has a simple process flow, does not need to add any catalyst and adsorbent, and has a good industrial application prospect.

This utility model relates to the field of detection device technology and discloses a detection device for a fire alarm, including a smoke storage box. A sealing cover is rotatably connected to the left side of the top of the smoke storage box. A support frame is fixedly installed at the top of the inner cavity of the smoke storage box. Magnets are fixedly installed at the right ends of both the sealing cover and the support frame. A steel wire rope is fixedly installed at the right end of the top of the sealing cover. By pulling the steel wire rope downwards, the sealing cover can be rotated upwards to open the top of the smoke storage box. The smoke storage box is then placed over the smoke alarm for detection. After detection, the steel wire rope is released. The compressed push spring, under its elastic force, moves the push rod upwards, pushing the extension block to rotate. This, in turn, causes the sealing cover to rotate in the opposite direction, sealing the smoke storage box and preventing smoke emission during movement. This reduces the use of smoke pellets and lowers detection costs.

The utility model belongs to the field of flue gas denitration, especially is involved in a kind of denitration system for adding pure ammonia gas to high nitrogen oxide concentration flue gas. In order to realize emission reduction, the utility model provides a kind of denitration system for adding pure ammonia gas to high nitrogen oxide concentration flue gas, the denitration system includes flue, denitration reactor, flue gas on-line monitor, pure ammonia gas adding system for adding pure ammonia gas to flue and automatic control system;Pure ammonia gas adding system includes the ammonia supply line for conveying pure ammonia gas, flow regulating valve and ammonia gas flowmeter are equipped on ammonia supply line, the downstream end of ammonia supply line is equipped with pure ammonia nozzle located in flue and located in the downstream of flue gas on-line monitor;Automatic control system is used to control the opening of flow regulating valve according to the flow and nitrogen oxide concentration of original flue gas. Directly add pure ammonia gas to original flue gas, and dilute pure ammonia gas using original flue gas, thereby saving the energy consumed by dilution fan and reducing the amount of flue gas finally discharged.

The utility model relates to the technical fields of ammonia fuel ship, specifically relates to a kind of ammonia fuel double ear can ship, including hull, deck, saddle and double ear fuel tank, deck is located at the top of hull, and hull and deck are enclosed into isolated cabin, saddle and double ear fuel tank are located in isolated cabin, saddle is fixed on hull, double ear fuel tank is installed on saddle, further include nitrogen generator, nitrogen generator inside has air compressor and drying unit, nitrogen generator is sent dry air to isolated cabin by dry air pipeline, isolated cabin side is connected with air supply pipeline, other side is connected with exhaust pipeline, dry air pipeline, air supply pipeline and exhaust pipeline are all provided with dew point sensor, nitrogen generator is arranged between air supply pipeline and exhaust pipeline, air supply pipeline and exhaust pipeline are all equipped with electrically-operated shut-off air valve. Dry air is sent to isolated cabin by dry air pipeline, effectively avoid the safety hazard caused by humid air into cabin to gas storage tank.

This invention discloses a method for preparing oxygen-free copper, relating to the field of metallurgical technology, comprising the following steps: Step S1, raw material pretreatment; Step S2, gradient melting and deoxidation; Step S3, gradient refining; Step S4, directional solidification casting; Step S5, heat treatment. The oxygen-free copper prepared by this method exhibits good mechanical properties, excellent electrical conductivity and heat resistance, and low oxygen content.

A method for preparing nickel powder through electrolysis of nickel sulfate waste liquid in one step comprises the steps that the nickel sulfate waste liquid is diluted to a certain concentration by controlling the reduction degree of Ni < 2 + > under different cathode conditions, and different nickel electrolysis products are selectively prepared in the diluent; ti plated TaO2 / I rO2 alloy is used as an anode, a Ti sheet is used as a cathode, electrolysis is carried out under the conditions that the current density is 30-2000A / m < 2 >, the electrolyte temperature is 20-60 DEG C and the nickel ion concentration is 0.025-1.0 mo l / L, and nickel powder is obtained through electrodeposition on the cathode after electrolysis is finished; a circulating pump is used for recycling waste liquid; the electrolytic nickel powder prepared through the method is simple in required equipment, short in technological process, mild in condition, low in production cost, high in efficiency, environmentally friendly, suitable for one-step preparation of the nickel powder through the high-impurity nickel sulfate waste liquid and suitable for one-step preparation of the electrolytic nickel powder through the pure nickel sulfate solution. The method is especially suitable for environmental protection enterprises of nickel-containing waste liquid.

The application discloses a solid mixed feed additive production line, which comprises a total distribution box, a screening machine, a premixing machine, a total mixing machine, a bottle sorting machine, a filling machine, a cap screwing machine, an aluminum foil sealing machine, a labeling machine, a boxing machine and a first conveying belt electrically connected with the total distribution box; the screening machine, the premixing machine and the total mixing machine are sequentially arranged, the filling machine, the cap screwing machine, the aluminum foil sealing machine, the labeling machine and the boxing machine are sequentially connected through the first conveying belt, the total mixing machine is arranged above the filling machine and connected with the filling machine through a first feeding spiral; the production line realizes a series of automatic production of solid feed from raw materials to finished product stacking, reduces the residence time of products in production, obviously reduces the influence of production links on products, improves the production efficiency; the closed structure between equipment effectively reduces the dust generated by materials, and avoids the influence of external environment on the feed quality; the product has low oxygen content, good sealing performance and high stability.

The utility model relates to rare earth hydrogen storage alloy or quick -setting neodymium iron boron alloy smelting auxiliary equipment technical field, specific, relate to a kind of rare earth metal powder explosion -proof dust collecting device, including shell, filter bag chamber, backflush mechanism, dust-containing gas inlet, purified gas outlet, still include inert gas supply gas path, explosion suppressor, explosion vent. Nitrogen gas path is introduced on the one hand reduces the oxygen content in dust collecting device, makes oxygen concentration reduce, reduces the oxidation reaction of rare earth metal, reduces the generation of heat. On the other hand, nitrogen in nitrogen gas path low pressure gas path is obtained by high-pressure liquid nitrogen throttling pressure reduction, temperature is lower, it is favorable to reduce the temperature in dust collecting device. The introduction of nitrogen gas path greatly reduces the explosion risk, this is the conventional working process. By introducing explosion suppressor, explosion vent, cooling can be carried out when temperature is too high and pressure relief after explosion, to slow down the progress of explosion and protect the entire device after explosion.

This application discloses a marine inert gas generator, relating to the field of gas generators. It includes a base; a combustion unit mounted on the base, which provides a combustion space; an air inlet pipe mounted on the combustion unit, supplying air to the combustion space; and a main burner mounted on the air inlet pipe, supplying fuel to the combustion space. This application utilizes an air inlet on an auxiliary burner housing to inject compressed air, which, in conjunction with a diesel nozzle and spark plug, generates a torch to ignite the fuel supplied by the main burner and form a main flame. Simultaneously, because multiple auxiliary burners are provided, even if a single auxiliary burner fails to ignite, it does not affect the final formation of the main flame, thus significantly reducing oil pollution and fuel waste caused by ignition failure, and avoiding the problem of excessive oxygen content in the inert gas.

The biomass gasification and waste incineration coupled combustion system relates to the field of biomass waste gasification disposal, and the first combustion chamber, the throat area and the second combustion chamber of the waste incineration device are sequentially arranged from bottom to top and are communicated, the upper end of the second combustion chamber is provided with a flue gas outlet capable of supplying flue gas to a chimney, the first burner unit is opposite to the first combustion chamber, and the second burner unit is opposite to the throat area; the flue gas recirculation system has a circulating inlet communicated with the flue gas outlet, a first circulating outlet and a second circulating outlet communicated with the first combustion chamber; the reaction cavity and the gasification gas outlet of the biomass gasification device are communicated, the reaction cavity comprises a redox area, the gasification gas outlet is communicated with the fuel inlet of the first burner unit and the fuel inlet of the second burner unit, and the flue gas inlet pipe is communicated with the redox area and the second circulating outlet at both ends; the biomass gasification and waste incineration are deeply coupled and complementarily utilized, the biomass gasification efficiency is improved, the nitrogen oxide emission is reduced, and the cost is reduced.

The application discloses a laser selective melting forming method in the technical field of additive manufacturing, and uses D406A ultra-high strength steel with low Mn content as a raw material, adopts a plasma rotating electrode atomization method to prepare metal powder, and then forms through a laser selective melting technology, so that D406A ultra-high strength steel printed parts with strength and impact performance equivalent to forged parts can be obtained through performance heat treatment. The D406A ultra-high strength steel formed through the laser selective melting has the advantages that the printed parts and the substrate can be separated through wire cutting without annealing, performance heat treatment can be directly carried out, and hot isostatic pressing treatment is not needed to reduce defects such as pores, so that the post-processing process is simplified, the production cycle is shortened, and the production cost is reduced.

The present application belongs to the technical field of detergent, and particularly relates to a green and environment-friendly multi-effect school uniform special dipping powder composition and application thereof. The green and environment-friendly multi-effect school uniform special dipping powder composition provided by the present application comprises the following components and mass percentages thereof: 30-60% of sodium percarbonate, 5-20% of anhydrous sodium metasilicate, 0.5-8% of non-ionic surfactant, 0.5-8% of zwitterionic surfactant, 0.5-5% of anionic surfactant, 0.2-0.5% of anti-redeposition agent, 0.2-1% of composite chelating agent, 0.6-4% of composite enzyme preparation, 0.05-8% of auxiliary agent, and the rest is sodium carbonate, and the sum of the mass percentages of the above components is 100%. The present application can be used without high-temperature dissolution of more than 60 DEG C or even 80 DEG C, can effectively protect the fabric, prevent the fabric from being damaged, and achieve the protection of the fabric while achieving the strong cleaning of stains, efficient whitening, dry deodorization and prevention of excessive cleaning.

The present invention provides an electroplating apparatus and method for prolonging the service life of a circulating electroplating solution by isolating external oxygen. The apparatus includes: an open electroplating tank; a sealed liquid storage tank with electroplating solution stored therein, injected with N2 and maintained at a preset pressure; a liquid injection, reflux and overflow pipeline connecting the electroplating tank and the liquid storage tank, with U-shaped liquid seals provided on both the reflux and overflow pipelines; an N2 pipeline for providing an oxygen-isolated environment for the electroplating solution reflux channel; a bypass pneumatic valve for opening after the N2 pipeline releases N2 to balance the N2 pressure in the liquid storage tank. The present invention innovatively proposes a brand-new open electroplating tank body device structure and electroplating solution circulation system. By controlling the N2 pipeline and using the U-shaped liquid seal, the air in the reflux and overflow pipelines can be discharged and the overall system can be helped to isolate air and oxygen. With the help of the bypass pneumatic valve, etc., the pressure generated by the input of N2 into the liquid storage tank can be balanced, enabling the reflux electroplating solution to flow back to the liquid storage tank by gravity. Moreover, the maintenance of the N2 pressure in the liquid storage tank can maintain a zero or low oxygen environment.

The utility model relates to waste and old lithium battery recycling technical field, concretely relates to a waste and old lithium battery continuous crushing system, including hopper, hopper bottom setting feed cavity, setting feeding device on feed cavity, setting negative pressure air port on the inner wall of feed cavity below feeding device, and negative pressure air port is connected with negative pressure fan through negative pressure pipeline, and the secondary pulverizer is connected in proper order with the tearing crusher below feed cavity, and the first positive pressure air port is set up on the secondary pulverizer, and the first positive pressure air port is connected with the first positive pressure nitrogen gas fan through the first positive pressure pipeline, the second positive pressure air port is set up on the tearing crusher, and the second positive pressure air port is connected with the second positive pressure nitrogen gas fan through the second positive pressure pipeline, the utility model discloses can prevent waste and old lithium battery broken tail gas to be sent to the atmosphere, reduces the pollution, avoids the production of deflagration in the system operation process, and the system safety is high, and the next batch waste and old lithium battery is broken without waiting for a batch waste and old lithium battery to break down, and the system can not be interrupted and runs, and the work efficiency is high.

This utility model relates to a food processor, comprising: a cooking pot having a hollow interior forming a chamber; a cooking component disposed within the chamber and movable under the drive of a driving mechanism to process food within the chamber; an air inlet and a switch for opening and closing the air inlet at the lower part of the chamber, and an exhaust port at the upper part of the chamber; the food processor further includes: a gas device for generating or storing food preservation gases, the output end of which is connected to the air inlet of the chamber. Compared with the prior art, this utility model can reduce the risk of food oxidation.

This invention discloses a die-bonding solder paste capable of air reflow soldering and its preparation method. It consists of 15% ultrasonically atomized 2-25µm Sn96.5Ag3.0Cu0.5 alloy solder powder and 85% nano-treated flux. The flux comprises the following mass percentages: solvent 40-50%, resin 35-40%, imidazole 5-8%, thixotropic agent 5-10%, and antioxidant 1-5%. It can be applied to high-power LED soldering. By using ultrasonically atomized solder powder with high sphericity, smooth surface, and low oxygen content, and preferably incorporating adsorbent film-type organic imidazoles and phenolic antioxidants with complexing metal ions, the flux is further nano-ground using a nano-grinding machine. The nano-ground flux completely coats the surface of the solder powder, forming a nanomaterial protective layer. This die-bonding solder paste differs from existing die-bonding solder pastes on the market, achieving air reflow soldering capability and further improving wetting performance, reducing production costs and contributing to environmental protection.