125 results about "Nitrogen Handling" patented technology

The invention relates to a method and device for preparing Ti-TiN core-shell powder, and the method comprises the steps that in an atomizing chamber, mixed gas is blown to a molten pool on the surface of an electrode bar, liquid drops are subjected to primary refining and primary coating nitrogen increasing treatment, the mixed gas comprises argon and nitrogen, and the volume content of the nitrogen does not exceed 10%; high-temperature pure nitrogen is blown to the flying liquid drops, so that secondary refining and secondary coating nitrogen increasing treatment are carried out, and the temperature of the high-temperature pure nitrogen is 1000-1500 DEG C; the powder which is not fully coated and the powder which is fully coated are separated through an electrostatic separation device; and the powder which is not fully coated is subjected to third-time coating nitrogen increasing treatment, so that the Ti-TiN core-shell structure powder is obtained. The prepared powder is core-shell powder with large thickness and small fineness, the yield is high, the shell layer structure is uniform, the sphericity degree of the powder is high, and the preparation efficiency is high.

The invention discloses a chemical wastewater biological denitrification device, and relates to the technical field of chemical wastewater. The device comprises a supporting frame, a denitrification barrel is arranged at the center of the top of the supporting frame, an annular limiting groove is formed in the bottom of the inner wall of the denitrification barrel, a drainage pipe is arranged at the bottom of the denitrification barrel, a control assembly is arranged at the top of the denitrification barrel, a water guide pipe is arranged in the control assembly, the bottom of the water guide pipe penetrates through the denitrification barrel, and two liquid injection openings are formed in the top of the denitrification barrel; the two liquid injection ports are symmetrically distributed about the axis of the denitrification barrel, and a cambered surface base is fixedly mounted at the bottom of the inner wall of the denitrification barrel. The separation filter plate is promoted to block and separate large mud blocks or impurities in wastewater, and small mud blocks are promoted to quickly fall down to synchronously perform nitrogen removal treatment with the wastewater in the up-down movement process of the separation filter plate, so that the situation that nitrogen in large mud is difficult to discharge is effectively prevented; therefore, the heterotrophic denitrifying bacteria have poor nitrogen removal effect on the wastewater and are directly discharged to cause environmental pollution.

The utility model discloses a denitrification treatment system for wastewater containing high ammonia nitrogen and refractory organics, and belongs to the technical field of wastewater treatment. The system comprises a coarse / fine grid, an adjusting tank, an anaerobic reaction tank, an anaerobic sedimentation tank, a Fenton reaction tank, an iron ammoxidation adjusting tank, an iron ammoxidation reaction tank, an iron ammoxidation sedimentation tank, a liquid alkali sedimentation tank, a sulfur autotrophic adjusting tank and a sulfur autotrophic tank which are sequentially communicated along the wastewater treatment direction, at least part of sludge in the anaerobic sedimentation tank flows back to the anaerobic reaction tank, at least part of sludge in the iron ammonia oxidation sedimentation tank flows back to the iron ammonia oxidation reaction tank, and at least part of sludge in the liquid caustic soda sedimentation tank flows back to the Fenton reaction tank; and residual sludge in the anaerobic sedimentation tank, the iron ammonia oxidation sedimentation tank, the liquid caustic soda sedimentation tank and the sulfur autotrophic tank sequentially enters a sludge concentration tank and sludge dewatering equipment. On the premise of meeting the production and environmental protection requirements, the operation and sludge treatment cost is reduced, and the operation stability of the treatment system is improved.

The invention discloses an anti-pollution flashover and anti-impact tempered glass insulator and a processing technology thereof.The processing technology comprises the steps that silicon dioxide, sodium carbonate, calcium oxide, magnesium oxide, cerium dioxide, niobium trioxide, scandium trioxide, tungsten carbide and nano boron nitride are evenly mixed according to the formula ratio and fused, and fused liquid is obtained; then slowly injecting the molten liquid into a mold preheated in advance in a nitrogen environment, molding, and demolding to obtain a blank; carrying out primary nitriding treatment, pulsed magnetic field treatment, toughening treatment, heat treatment and secondary nitriding treatment to obtain a toughened glass part; and finally, binding the iron cap, the toughened glass piece and the steel foot into a whole by using an adhesive to obtain the toughened glass insulator. The toughened glass insulator has excellent anti-pollution flashover and anti-impact performance.

The invention provides a coal gasification wastewater treatment method and system capable of recycling a carbon source, relieving hardness sludge accumulation of a biochemical system and controlling scaling of an aeration system, and belongs to the technical field of sewage treatment.The treatment method comprises the steps that coal gasification wastewater and sludge hydrolysis mixed liquor are mixed and eluted, then a flocculating agent is added for precipitation and separation, and the sludge hydrolysis mixed liquor is obtained; carrying out biological denitrification treatment on the obtained supernate, and carrying out concentration and alkaline hydrolysis on the obtained residual sludge to obtain a sludge hydrolysis mixed solution mixed with the coal gasification wastewater; the treatment system comprises a residual sludge alkaline hydrolysis device, an elution tank, a sedimentation tank, a biochemical system and an organic sludge concentration tank. The treatment method provided by the invention can make a breakthrough in the aspect of scaling control of a biochemical system, can recover carbon source substances in excess sludge to reduce the carbon source usage amount of the treatment system, and can use a liftable microporous aerator to improve the overall energy efficiency level of coal gasification wastewater treatment.

The invention discloses a 38CrMoAl material and a vacuum nitriding method, and relates to the field of nitriding processes of special-shaped parts, and the nitriding method comprises the steps that S1, after a 38CrMoAlA steel part is put into a furnace, the furnace is filled with air, heating is conducted, pre-oxidation is conducted, and a pre-oxidation workpiece is obtained; s2, vacuumizing, refilling nitrogen, and raising the temperature to a nitriding temperature; s3, after the temperature is increased to the nitriding temperature, ammonia cracking gas is introduced into the furnace for nitriding treatment; and S4, nitrogen removal. And the problem of furnace temperature uniformity in the vacuum nitriding process can be effectively improved. According to different nitriding stages, the concentration of nitrogen atoms in the furnace can be automatically and accurately controlled, the ammonia gas consumption is reduced, and the nitriding layer depth and the nitriding layer quality are improved.

The invention discloses an air-lift integrated device based on an anaerobic ammonia oxidation process, and relates to the technical field of sewage treatment, the air-lift integrated device comprises a reaction container, the top of the reaction container is provided with a top cover, a stirring mechanism is arranged above the top cover, and the outer surface of the reaction container is fixedly provided with a water pump 1. By arranging the aeration assembly, gas can escape in the form of tiny bubbles, the gas-liquid contact area is greatly increased, by arranging the stirring mechanism, the bubbles generated by the aeration assembly can be further crushed and dispersed, meanwhile, the bubbles can be guided to spirally rise in the reaction container, and the gas-liquid separation effect is improved. The aeration assembly and the stirring mechanism are matched for use, so that the contact time of bubbles and liquid can be remarkably prolonged, the oxygen transmission efficiency is greatly improved, anaerobic ammonia oxidizing bacteria can take in oxygen more sufficiently to react with a substrate, and the sewage denitrification treatment efficiency and quality can be effectively improved; and the treated sewage is ensured to be stably discharged up to the standard.

The invention discloses an ammonia nitrogen treatment system and method for coke oven gas direct reduction factory wastewater. Comprising an aeration tank, an inclined tube sedimentation tank, a dosing device, a buffer water tank, a quartz sand filter, a middle water tank, a mixer, a liquid caustic soda storage tank, a deamination tower kettle, a discharged pH regulating tank, a sulfuric acid storage tank, an ammonium sulfate circulating tank, an aeration fan, an air stripping fan, a gas buffer bag, an ammonium sulfate circulating pump and a sulfuric acid pump, an ammonia-nitrogen-containing wastewater pipeline is sequentially communicated with an aeration tank and an inclined tube sedimentation tank, an overflow port of the inclined tube sedimentation tank is communicated with a water inlet of a buffer water tank, and a water outlet of the buffer water tank is sequentially communicated with a quartz sand filter, a middle water tank, a mixer and a deamination tower kettle; the aeration fan is communicated with an air inlet of the aeration box, the dosing device is communicated with a dosing port of the inclined tube sedimentation tank, and the liquid caustic soda storage tank is communicated with a caustic soda inlet of the mixer. After the system and the method are adopted for treatment, the ammonia nitrogen of the effluent stably reaches the standard, the pH value is stable, and the effluent meets the first-level wastewater discharge standard of the national Integrated Wastewater Discharge Standard.

The invention aims to provide a heat treatment-liquid nitrogen treatment-cryogenic forging composite forming method for obtaining an alpha '+ alpha' double-phase martensitic structure titanium alloy, and belongs to the technical field of titanium alloy plastic processing and heat treatment. Through liquid nitrogen treatment, the sample obtains a uniform cryogenic temperature and stabilizes an alpha'martensite phase structure; alpha'martensite to alpha '' martensite phase transformation of the alloy is promoted through cryogenic forging. And finally, obtaining the needle-shaped alpha '+ alpha' 'biphase martensitic structure titanium alloy forge piece based on the synergistic effect of heat treatment, liquid nitrogen treatment and cryogenic forging. Compared with traditional cryogenic forming of the titanium alloy, the method can achieve uniform distribution of nanoscale alpha '+ alpha' 'biphase martensite in the titanium alloy forge piece, meanwhile, the technological process is simple, and actual production is easy.

The invention discloses industrial wastewater denitrification treatment equipment which comprises a container tank, and a filler assembly used for containing filler is arranged in the container tank; a material turning assembly is rotationally arranged at the top of the filling assembly, a rotating assembly used for driving the material turning assembly is arranged at the top of the container tank, rotation of the material turning assembly relative to the filling assembly is achieved through the rotating assembly, and meanwhile the material turning assembly conducts circular motion around the container tank; the material overturning assembly rotates relative to the material filling assembly to realize overturning of the filler, and the material filling assembly is driven to move through circular motion of the material overturning assembly; an aeration assembly is arranged in the container tank and located below the filler assembly, a cleaning assembly is arranged at the upper end in the container tank, rotation of the cleaning assembly and the aeration assembly is achieved through a rotating assembly, and cleaning of the water surface is achieved through rotation of the cleaning assembly; the material turning assembly ensures that water flow and oxygen are uniformly distributed in the system, and meanwhile, insufficient treatment or dead zone formation in some areas is avoided.

The invention belongs to the technical field of sewage denitrification treatment, and particularly relates to an integrated energy-saving denitrification device and method.The integrated energy-saving denitrification device comprises a treatment pond, the two sides of the treatment pond are both communicated with sewage inlet and outlet pipelines, and one end of the top of the treatment pond is fixedly connected with a mounting frame; and a hopper used for adding base material particles is fixedly mounted in the mounting frame. According to the integrated energy-saving denitrification device, the reaction frame and the driving mechanism are arranged, so that base material particles reacted with sewage do not need to be fished, the use convenience of the base material particles is improved, the reaction speed of the base material particles and the sewage is increased, the reaction efficiency of denitrification treatment of the sewage is improved, and the sewage treatment efficiency of the integrated energy-saving denitrification device is improved; and the material changing mechanism is arranged, so that the base material particles in the reaction frame can be automatically replaced while the sewage treatment is performed in the treatment tank.

The full-automatic powder packaging equipment with the low residual oxygen content comprises a main machine frame and a packaging bag feeding machine, a main filling mechanism, an air exhaust mechanism, an auxiliary filling machine, a bag opening and edge pressing mechanism and a heat sealing machine are sequentially arranged on the main machine frame, a main conveying line and a weighing belt conveyor are fixedly connected to the main machine frame, the main conveying line is divided into two sections, and the weighing belt conveyor is arranged on the main conveying line. The two main conveying lines are connected with the two ends of the weighing belt conveyor in an end-to-end mode respectively, a vibration assembly is arranged on the main conveying lines and located below the air exhaust mechanism and the bag opening and edge pressing mechanism, and the feeding end of the Y-shaped material box is fixedly connected with an annular inflation pipe. The powder material bagging and filling device has the following beneficial effects that automatic bagging, filling, exhausting and nitrogen filling treatment of powder materials can be achieved, air and powder among the powder materials can be well removed in the packaging process, the residual oxygen amount of packaging is effectively reduced, and the packaging quality is improved.

To provide a water treatment apparatus and a water treatment method, capable of reducing an aeration gas volume, a use amount of a pH adjustment agent, and a use amount of a hydrogen donor, with regard to a water treatment in which a nitrification treatment, a denitrification treatment and an oxidation treatment are applied to treatment-target water containing ammoniac nitrogen using a carrier carrying a microorganism.SOLUTION: A water treatment apparatus 1 includes: a first nitrification tank 10 configured to apply a first nitrification treatment to treatment-target water containing ammoniac nitrogen by an autotrophic germ; a first denitrification tank 12 configured to apply a first denitrification treatment to first nitrification-treated water under a presence of a hydrogen donor; a second nitrification tank 14 configured to apply a second nitrification treatment to first denitrification-treated water by an autotrophic germ; a second denitrification tank 16 configured to apply a second denitrification treatment to second nitrification-treated water under a presence of a hydrogen donor; and an oxidation tank 18 configured to apply an oxidation treatment to second denitrification-treated water. A carrier carrying a microorganism is packed into each of the first nitrification tank 10, the first denitrification tank 12, the second nitrification tank 14, the second denitrification tank 16 and the oxidation tank 18.SELECTED DRAWING: Figure 1

The invention discloses a flue gas re-burning low-nitrogen treatment system, and relates to the technical field of flue gas treatment, the flue gas re-burning low-nitrogen treatment system comprises a recovery unit, a flue gas treatment unit and a flue gas re-burning unit, the recovery unit comprises a recovery pipeline, the recovery pipeline is connected with a chimney, flue gas recovered by the recovery unit through the recovery pipeline is treated by the flue gas treatment unit, and the flue gas re-burning unit is connected with the flue gas treatment unit. The flue gas treatment unit comprises a demister and a condenser, treated flue gas enters the flue gas re-burning unit, a flue gas incinerator is arranged in the flue gas re-burning unit, and the flue gas is subjected to re-burning and nitrogen reduction treatment through the flue gas incinerator. About 30% of smoke is sucked back to participate in re-burning, and the total amount of smoke directly discharged from the chimney to the atmosphere is correspondingly reduced; the flue gas is subjected to low-nitrogen treatment through flue gas re-burning, so that the emission concentration and emission amount of pollutants are reduced, the problem of secondary pollution caused by re-treatment is avoided, other potential safety hazards of operation are avoided, and the flue gas re-burning system is relatively low in investment cost and remarkable in treatment effect.

The invention discloses a preparation method of high-nitrogen steel powder with ultrahigh nitrogen content, which specifically comprises the following steps: adding the high-nitrogen steel powder into a vacuum boiler filled with nitrogen for heating, and continuously stirring to uniformly heat the powder and avoid agglomeration at the same time; after heat preservation is conducted for a proper time, a filter screen window below the boiler is opened, meanwhile, a lower powder outlet of the boiler is opened, and powder in the boiler is screened through a filter screen under the action of high-pressure nitrogen jet flow; the screened powder falls into a liquid nitrogen pool for rapid cooling and nitrogen dissolving treatment; and after the powder is treated by liquid nitrogen for a certain time, a filter screen at the bottom of the liquid nitrogen pool is opened to treat redundant liquid nitrogen and screen the powder, and finally the high-nitrogen steel powder with the ultrahigh nitrogen content is obtained in the liquid nitrogen pool. According to the method, the high-nitrogen steel powder with the ultrahigh nitrogen content can be obtained on the basis of traditional high-nitrogen steel powder preparation, and the method has the advantages of being simple in process, low in cost, high in practicability, convenient to achieve industrial production and the like.

The invention discloses a high-concentration ammonia nitrogen treatment device and method for condensate of a coal chemical enterprise. The high-concentration ammonia nitrogen treatment device comprises a raw water storage system, a pretreatment system, an ammonia stripping system, an ammonia gas recovery system, a post-treatment system and an automatic control system, the raw water storage system, the pretreatment system, the ammonia stripping system, the ammonia gas recovery system and the post-treatment system are connected in sequence; the automatic control system is respectively connected with the raw water storage system, the pretreatment system, the ammonia stripping system, the ammonia gas recovery system and the post-treatment system. By adopting the technical scheme, the effects of remarkably reducing energy consumption, realizing resource utilization, being low in investment cost, low in operation cost, profitable, high and stable in treatment efficiency, high in automation degree, small in occupied area, capable of eliminating secondary pollution, high in adaptability, simple and convenient to maintain and short in investment payback period can be achieved.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a denitrification reactor, a denitrification method and application. The denitrification nitrogen removal reactor comprises a denitrification nitrogen removal reactor body, wherein a water distribution pipe, a filler layer and a water collection device are sequentially arranged in the denitrification nitrogen removal reactor body from bottom to top; one end of the water distributor communicates with the pulsed water source; filler in the filler layer comprises a hydrophilic sulfenyl denitrification electron donor; and the particle size of the hydrophilic sulfenyl denitrification electron donor is 0.5-1.5 mm. According to the invention, a hydrophilic sulfenyl denitrification electron donor with a specific particle size is adopted as a filler, pulse water feeding is adopted, periodic hydraulic disturbance is generated in the reactor, and filler particles are pushed to generate pulse fluidization, so that efficient denitrification nitrogen removal treatment is realized, and the nitrogen removal efficiency can exceed 90%. Meanwhile, the denitrifying nitrogen removal reactor is simple in structure, easy to maintain and suitable for small and medium-sized sewage stations and distributed nitrogen removal scenes.

The utility model discloses a nitrogen preservation device for beverage filling, which comprises a mounting rack, a beverage can body is arranged on the mounting rack, an adjusting mechanism is mounted on the mounting rack, the adjusting mechanism is matched with the beverage can body, and a liquid injection mechanism, a nitrogen filling mechanism and a rotating mechanism are mounted on the adjusting mechanism. Through the arrangement of the rotating shaft, the beverage filling head, the nitrogen filling head, the first motor, the rotating shaft, a positioning hole and other structures, when nitrogen filling is conducted on the beverage can body for freshness retaining, the nitrogen filling head on the rotating shaft only needs to be aligned with the beverage can body for nitrogen filling treatment, and after nitrogen filling is finished, the rotating shaft only needs to be rotated, so that the beverage can body can be kept fresh; according to the beverage can, the beverage infusion head can be conveniently aligned with the beverage can body to infuse beverage, so that nitrogen filling and beverage infusion can be performed on the beverage can body at the same position, and the situation that air enters the beverage can body due to nitrogen volatilization in the conveying process can be effectively avoided.

The invention belongs to the technical field of stainless steel, and particularly relates to a high-strength and high-toughness stainless steel wire for an ophthalmic scalpel and a preparation method of the high-strength and high-toughness stainless steel wire, the content of a precious element Ni is reduced, the content of a Cu element and the content of a Ca element are increased, and the high-strength and high-toughness stainless steel wire for the ophthalmic scalpel is obtained through the production process of hot rolling, solid solution, cold rolling, annealing, cold drawing, annealing, cold drawing and low-temperature liquid nitrogen treatment. The stainless steel wire with the separated nanoscale copper-rich phase and the fibrous microstructure is produced, the yield strength of the finally produced stainless steel wire is larger than or equal to 1130 MPa, the tensile strength is larger than or equal to 1550 MPa, the ductility is larger than or equal to 35%, and the requirement for machining and application of ophthalmic surgical tools can be met.

The present invention relates to the field of leachate treatment technology, specifically a landfill leachate ammonia nitrogen treatment equipment, including a frame, and also including: an aerobic nitrification reaction structure connected to the frame; two groups of anaerobic denitrification reaction structures connected to the frame; a bubble scrubbing spoiler structure connected to the frame, the bubble scrubbing spoiler structure including an active telescopic frame, the movable end of the active telescopic frame is fixedly connected to a first rotating head, the first rotating head is connected to an air supply part, the first rotating head is rotatably connected to a second rotating head, the second rotating head is fixedly connected to a hollow frame, the hollow frame is hinged with a change-direction jet part, the change-direction jet part is connected to a swing drive part, and the change-direction jet part is connected to a pitch drive part. The present invention disperses the bacterial colony attached to the inner wall of the aerobic nitrification reaction structure and completes the stirring of the leachate, while ensuring sufficient oxygen supply to the bacterial colony, improving the speed of the aerobic nitrification reaction, thereby improving the treatment efficiency of the present invention for the leachate.

This invention discloses a low-temperature nitriding system, comprising a horizontal frame, a lower mold assembly, an upper mold assembly, a mold closing drive mechanism, multiple solid nitrogen source sheets, and a reciprocating drive mechanism. The lower mold assembly is located at the bottom of the frame, with a lower semi-circular groove on its upper surface. The upper mold assembly is movably mounted on the frame, with an upper semi-circular groove on its lower surface. When the upper and lower molds are closed, a cylindrical cavity with a diameter larger than that of a steel rod is formed. Multiple solid nitrogen source sheets are arc-shaped and respectively adhered to the inner walls of the grooves in the upper and lower molds. The mold closing drive mechanism drives the upper mold to move downwards, causing the nitrogen source sheets to adhere tightly to the surface of the steel rod. The reciprocating drive mechanism drives the steel rod to reciprocate axially, causing relative sliding between the steel rod surface and the nitrogen source sheets, inducing nitrogen atom infiltration through frictional heat and plastic deformation. This invention requires no external heating, has extremely low energy consumption, avoids thermal deformation problems, has high nitrogen atom utilization, and has a simple structure.

The present application relates to sewage denitrification treatment technical field, specifically to a kind of high-efficiency denitrification filter, including filter water pool body, water inlet groove, water supply groove, reaction cavity, filter baffle, water guide assembly, outlet pipe, backwashing component, overflow notch, collection tank and control assembly;The inside of the filter water pool body is provided with multiple reaction cavities, the reaction cavities are parallelly arranged between each other, the water inlet groove is opened in the upper portion of filter water pool body, the water supply groove is arranged on the top of reaction cavity, the filter baffle is installed at the bottom of reaction cavity, the water guide assembly is installed below filter baffle, the outlet pipe is installed in the side of water guide assembly, the backwashing component is arranged on the outer side of water inlet groove, the overflow notch is opened in the side of filter water pool body, the collection tank is arranged outside overflow notch, and the control assembly is installed inside reaction cavity.

The invention belongs to the technical field of heat treatment furnace auxiliary control devices, and particularly discloses a vacuum heat treatment furnace air cooling control device which comprises a heat treatment furnace body, a transmission cavity is formed in the inner bottom face of the heat treatment furnace body, a rotating disc is rotationally arranged between the inner walls of the transmission cavity, and the bottom of the rotating disc is slidably clamped to the side wall of the transmission cavity. When a workpiece is heated to a certain temperature, the feedback assembly can be triggered to work, the transmission assembly is cut off when the feedback assembly works, so that the rotating disc stops rotating, and the workpiece is heated to a certain temperature. Meanwhile, nitrogen introduced by the gas inlet pipe cap is introduced into the heat treatment furnace body to blow the outer surface of the heated workpiece, so that the outer surface of the workpiece can be subjected to nitriding treatment, and when the feedback assembly works, the gas filtering assembly can be conducted, so that the nitrogen blowing the workpiece is filtered by the gas filtering assembly and then discharged; and carried dust is prevented from polluting air in a workshop.

The present application relates to the field of pesticide wastewater nitrogen removal equipment, specifically to a pesticide production wastewater total nitrogen detection and treatment equipment, which comprises a treatment tank, a driving motor is fixedly connected to the middle position of the top of the treatment tank, and the rotating end of the driving motor is fixedly connected with a transmission shaft, the inner top surface of the treatment tank is fixedly connected with an adjusting cylinder matched with the transmission shaft, and the equipment further comprises an aeration adjusting mechanism, which is movably installed between the surface of the adjusting cylinder and the surface of the transmission shaft, and the transmission shaft drives the aeration adjusting mechanism to operate to uniformly distribute oxygen in the treatment tank. The pesticide production wastewater total nitrogen detection and treatment equipment is composed of an aeration adjusting mechanism and a pollution cleaning mechanism; when the nitrifying bacteria in the treatment tank need to react through oxygen, the aeration component can rise, expand and rotate in the treatment tank under the action of the aeration mechanism, so that the oxygen is uniformly dispersed in the treatment tank, thereby improving the nitrogen removal treatment effect.

The invention discloses a high-boron high-chromium alloy cast iron fire grate bar of a sintering machine trolley furnace and a manufacturing method of the high-boron high-chromium alloy cast iron fire grate bar, and belongs to the technical field of smelting equipment, and the high-boron high-chromium alloy cast iron fire grate bar comprises the following material components in percentage by mass: 0.1-5% of B, 1.0-2.0% of C, 0.5-1.5% of Si, 0.5-1.5% of Mn, 15.0-22.0% of Cr, 0.1-2% of Ni, 0.1-2% of Mo, 0.01-0.06% of P, 0.01-0.06% of S and the balance of Fe. Comprising the following steps: modeling a casting casting model, preparing furnace charge according to the percentage, performing conventional deoxidization and nitrogen fixation treatment on a melt during smelting, controlling the smelting temperature to be 1500-1600 DEG C, immediately pouring after smelting to the temperature, controlling the pouring temperature to be 1450-1550 DEG C, and performing sand removal and cleaning on the cast fire grate casting, thereby obtaining the fire grate casting which can be used without heat treatment. The material can resist high-temperature oxidation, the strength and toughness in a high-temperature environment are improved, the service life is greatly prolonged, and the operation efficiency of equipment is improved.

The application relates to the technical field of sewage treatment, in particular to a sulfur autotrophic denitrification and nitrogen removal treatment device, which comprises an integrated box, a second turnover plate rotatably installed at the front end of the integrated box, a first turnover plate rotatably installed at the edge position of the top end of the integrated box, and a PLC controller fixedly installed at the front end of the integrated box. The multiple treatments of the ultrafiltration membrane tube, the autotrophic denitrifying bacteria and the active carbon filter plate can guarantee the sewage treatment effect, can make the autotrophic denitrifying bacteria in a suitable survival environment, can guarantee the nitrogen removal effect, are energy-saving and environment-friendly, are convenient to use, can conveniently replace the active carbon filter plate, can guarantee the purification effect of water, can reduce the resistance received by the movable ring during the sliding process on the threaded screw rod in the process of replacing the active carbon filter plate, are favorable for the up-and-down movement of the sealing plate, and are favorable for the replacement of the active carbon filter plate.

The invention discloses a chemical wastewater biological denitrification device, and relates to the technical field of chemical wastewater. The device comprises a supporting frame, a denitrification barrel is arranged at the center of the top of the supporting frame, an annular limiting groove is formed in the bottom of the inner wall of the denitrification barrel, a drainage pipe is arranged at the bottom of the denitrification barrel, a control assembly is arranged at the top of the denitrification barrel, a water guide pipe is arranged in the control assembly, the bottom of the water guide pipe penetrates through the denitrification barrel, and two liquid injection openings are formed in the top of the denitrification barrel; the two liquid injection ports are symmetrically distributed about the axis of the denitrification barrel, and a cambered surface base is fixedly mounted at the bottom of the inner wall of the denitrification barrel. The separation filter plate is promoted to block and separate large mud blocks or impurities in wastewater, and small mud blocks are promoted to quickly fall down to synchronously perform nitrogen removal treatment with the wastewater in the up-down movement process of the separation filter plate, so that the situation that nitrogen in large mud is difficult to discharge is effectively prevented; therefore, the heterotrophic denitrifying bacteria have poor nitrogen removal effect on the wastewater and are directly discharged to cause environmental pollution.

This invention discloses a method and system for treating wastewater effluent from a wastewater treatment plant. The method includes the following steps: acquiring parameter data of the effluent, including total phosphorus, suspended solids concentration, total nitrogen, and chemical oxygen demand (COD); selecting a corresponding effluent treatment method based on the parameter data, wherein the treatment method includes sedimentation, denitrification, and / or COD removal; and discharging the treated effluent into a clear water tank. This invention, through data analysis, customized treatment strategies, and discharge mechanisms, can flexibly adjust the treatment method according to the effluent conditions, achieving efficient pollution removal and cost savings.

The invention discloses a high-ammonia-nitrogen low-COD (Chemical Oxygen Demand) wastewater denitrification treatment device and method. The wastewater denitrification treatment device comprises a water inlet system, a biological denitrification system, an aeration system, a dosing system, a mixed liquid solid-liquid separation system, a precipitation concentration and reflux system and a control system, the water inlet system is connected with the biological denitrification system; the mixed liquid solid-liquid separation system is arranged in the biological denitrification system; the aeration system is connected with the biological denitrification system; the dosing system is connected with the biological denitrification system; the water inlet end of the precipitation concentration and reflux system is connected with the water outlet end of the biological denitrification system; the control system is respectively connected with the precipitation concentration and reflux system, the water inlet system, the biological denitrification system, the aeration system and the dosing system. The method keeps the advantage that nitration reaction and anaerobic ammonia oxidation reaction can be carried out at the same time, is flexible to control and easy to adjust, and is suitable for removing ammonia nitrogen and total nitrogen in high-ammonia-nitrogen low-COD wastewater.

The utility model relates to the technical field of sewage denitrification treatment devices, and discloses an integrated sewage denitrification treatment device which comprises an equipment box, a water inlet pipe is fixedly connected above the equipment box, one side of the equipment box is fixedly connected with a first mounting box, a first motor is fixedly connected in the first mounting box, and a second motor is fixedly connected in the first mounting box. The output end of the first motor is fixedly connected with a first transmission rod, a first connecting hole is formed in one side of the equipment box, the first transmission rod penetrates through the first connecting hole, and the outer surface of the circumference of the first transmission rod is fixedly sleeved with a spiral blade. According to the integrated sewage denitrification treatment device disclosed by the utility model, filtered impurities are conveniently discharged out of the device, the use efficiency of the device is improved, sewage is conveniently stirred, the reaction efficiency of the sewage and nitrifying bacteria is improved, heat preservation is conveniently carried out in the device, and the reaction efficiency of the nitrifying bacteria is prevented from being reduced due to cold.