38 results about "Excess nitrogen" patented technology

A novel method and system for liquefying and distilling natural gas into high purity liquid methane (LNG) and NGL product streams. Heat exchangers and distillation towers are configured to produce high purity liquefied natural gas (LNG) and NGL product streams, while also rejecting excess nitrogen contained in the inlet gas stream, utilizing liquid nitrogen as the process refrigerant. A molecular sieve pretreatment system is configured to utilize the vaporized nitrogen stream for regeneration of the molecular sieve beds which are designed for removing water and carbon dioxide from the inlet gas stream

A system and method for removing nitrogen from an intermediate stream in a gas subcooled process operation that processes natural gas into a sales gas stream and a natural gas liquids stream. The system and method of the invention are particularly suitable for use with gas subcooled process operations where the sales gas stream exceeds pipeline nitrogen specifications by up to about 3%, such as for reducing the nitrogen content of sales gas streams to levels permissible for pipeline transport.

The invention belongs to the field of agriculture, and specifically relates to a nitrogen topdressing method implemented through real-time diagnosis in a wheat jointing stage. The method comprises the following steps: in a wheat jointing stage, determining the mean value of SPAD (relative content of leaf chlorophyll) values of wheat leaves in fields; and then, according to the actually-measured mean value of SPAD values of wheat leaves, carrying out nitrogen topdressing in combination with the types of wheat. After an operation of nitrogen topdressing is performed according to the method disclosed by the invention, the application amount of a nitrogen fertilizer can be effectively controlled, and unnecessary fertilizer applications are reduced, thereby facilitating the improvement of the fertilizer efficiency, achieving high yield and high efficiency, and reducing the environmental pollution caused by excess nitrogen fertilizer application.

The invention discloses a coloring and curing mechanism of an optical fiber coloring machine and belongs to the technical field of optical cable processing devices. The optical fiber coloring machine comprises a machine frame box body, and the coloring and curing mechanism comprises a nitrogen inlet pipe provided with a first pressure regulating valve, a printing ink tank, a curing oven and an optical fiber guide device, wherein the printing ink tank and the curing oven are arranged on the machine frame box body; the nitrogen inlet pipe is provided with a three-way connector which arranged in the nitrogen inlet pipe at a position on the air outlet side of the first pressure regulating valve and is connected with the pipes of the printing ink tank and the curing oven respectively; and a second pressure regulating valve is arranged on the pipe connecting the three-way connector and the curing oven. The coloring and curing mechanism of the optical fiber coloring machine has the advantages of increasing nitrogen volume acquired by the printing ink tank, preventing excess nitrogen flow in the curing oven, improving the coloring speed, guaranteeing processing efficiency, saving nitrogen and protecting environment.

A blast furnace where coke is combusted with oxygen, instead of air, and where a top gas comprising CO, CO₂, H₂, and without excess nitrogen is withdrawn from the upper part of the blast furnace, cleaned of dust, the H₂/CO volume ratio adjusted to between 1.5 to 4.0 in a water shift reactor, water and CO₂ are removed (increasing its reduction potential), heated to a temperature above 850° C. and fed back to the blast furnace above where iron starts melting (thereby increasing the amount of metallic iron reaching the dead-man zone and decreasing the amount of coke used for reduction). Also carbon deposit problems caused by heating the CO-containing recycled gas are minimized by on-line cleaning of the heater tubes with steam without significantly affecting the reduction potential of the recycled reducing gas.

The invention discloses a method for removing nitrogen and phosphorus from water by using calcium silicate prepared from silicon recycled from red mud, and relates to a method for removing nitrogen and phosphorus from water. By the method, the problems of waste resource utilization and removal of excess nitrogen and phosphorus from water are solved. The method comprises the following steps: leaching most of metal oxides from the red mud by using dilute hydrochloric acid first and then leaching titanium and rare earth elements from the red mud by using concentrated sulfuric acid so as to leave silicon dioxide powder, and then preparing the extracted silicon dioxide into calcium silicate by a hydrothermal method. A certain amount of calcium silicate is added into waste water containing nitrogen and phosphorus, the waste water is oscillated at a certain temperature, ammonia nitrogen is removed from water through gas-liquid separation, and phosphorus is removed from water through ligand exchange and chemical precipitation.

The invention discloses a culture method for tilapia breeding based on a bio-flocculation technology. According to the bio-flocculation technology, through assimilation and absorption of microbial communities to inorganic nitrogen in aquaculture water, cordate houttuynia in the floating bed can absorb and assimilate excess nitrogen, phosphorus and organic matter in the pond culture process to purify the water in the pond. The formed bio-flocculent can be used as feed protein, so that secondary utilization of bait protein is realized, the growth of tilapia is promoted, and the utilization efficiency of bait is improved. In addition, cordate houttuynia as a medicinal plant can provide food for tilapia in the process of culture, which is conductive to the improvement of the immune performanceof the fish body. By combining the advantages of the bio-flocculation technology and the cordate houttuynia floating bed technology, an obvious regulation effect is achieved on the water quality of pond culture, and water self-purification is promoted. Moreover, the non-specific immunity of tilapia can be obviously improved to a certain extent, and the yield of tilapia can be increased.

The invention relates to the technical field of manufacture and reliability of silicon carbide semiconductor devices and provides a passivation method for improving high and low temperature stabilityof SiC MOSFET devices comprises the following steps: (1) performing cleaning by an RCA process; (2) performing high temperature thermal oxidation; (3) performing nitrogen-hydrogen mixed plasma passivation treatment; (4) performing glue coating, photolithography, etching, glue removing, and ion implantation to form a source region and a drain region, and (5) manufacturing the SiC MOSFET. The methodhas the advantages that N-H in the nitrogen-hydrogen mixed plasma effectively passivates the oxide trap and the interface trap, in which the H element can passivate oxide traps and interface traps onthe basis of N passivation, and the deep-level traps generated by excess nitrogen are moved to the lower half of the forbidden band or beyond the forbidden band, which reduces the influence of trapson the stability of the MOSFET and improves the stability of SiC MOSFET at low temperature (80-300K) and high temperature (300-500K).

A system and method for monitoring anode bleed trigger events and determining when to adjust a proactive bleed schedule in a fuel cell system. The system employs a bleed trigger monitor algorithm for monitoring proactive bleed and reactive bleeds that determines whether the reactive bleeds are caused by excess nitrogen in the anode. The algorithm monitors the number of reactive bleeds that are cause by nitrogen accumulation in the anode side of the fuel cell stack and changes the proactive bleed schedule in response thereto, if necessary.

The invention relates to a wastewater treatment device capable of removing peculiar smells. The wastewater treatment device comprises a first infusion pump, a filter, a heavy metal adsorption tank, a second infusion pump, an acid-base neutralization tank, a third infusion pump, an ozone generator, an evaporator and a cooler, wherein wastewater is pumped from the water inlet of the first infusion pump; the water outlet of the first infusion pump is communicated with the water inlet of the filter through a pipeline; the water outlet of the filter is communicated with a heavy metal sedimentation tank through a pipeline; the water inlet of the second infusion pump is communicated with the heavy metal sedimentation tank; the water outlet of the second infusion pump is communicated with the acid-base neutralization tank through a pipeline; the water inlet of the third infusion pump is communicated with the acid-base neutralization tank; the water outlet of the third infusion pump is communicated with the ozone generator through a pipeline; the ozone generator, the evaporator and the cooler are sequentially communicated through a pipeline. Compared with the prior art, the wastewater treatment device can absorb heavy metal, remove excess nitrogen and phosphorus elements, sterilize and purify, and remove the peculiar smells.

A synthesis plant includes a separation system upstream of a synthesis loop that removes excess nitrogen and other gaseous compounds from a feed gas having a ratio of hydrogen to nitrogen of less than 3:1, thereby producing a syngas with a ratio of hydrogen to nitrogen at about 3:1. Particularly preferred separation systems include a coldbox with a refrigerant other than air, or a pressure swing absorption system.

The invention relates to a waste water treatment device with an organic matter degradation function. The device comprises a first liquid drawing pump, a filter, a heavy metal sedimentation tank, a second liquid drawing pump, an acid-base neutralization tank, a third liquid drawing pump, a microelectrolysis device, an evaporator and a cooler. Waste water is extracted by a water inlet of the first liquid drawing pump, a water outlet of the first liquid drawing pump is communicated with a water inlet of the filter by a pipe, a water outlet of the filter is communicated with the heavy metal sedimentation tank by a pipe, a water inlet of the second liquid drawing pump is communicated with the heavy metal sedimentation tank, a water outlet of the second liquid drawing pump is communicated with the acid-base neutralization tank by a pipe, a water inlet of the third liquid drawing pump is communicated with the acid-base neutralization tank, a water outlet of the third liquid drawing pump is communicated with the microelectrolysis device by a pipe, and the microelectrolysis device, the evaporator and the cooler are orderly communicated by pipes. Compared with the existing waste water treatment device, the waste water treatment device provided by the invention can adsorb heavy metals and eliminate excess nitrogen and phosphor elements and high-concentration salt, difficultly degraded and high-chroma substances.

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product.

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product.

The invention relates to a water-flush formula fertilizer special for a Chinese herbal medicine Andrographis paniculata. The fertilizer comprises the following effective elements by weight: 23.0-28% of nitrogen; 6.0-10.0% of phosphor, measured in P2O5; 10.0-15.0% of potassium, measured in K2O; 1.2-3.5% of sulfur, measured in SO4<2->; 0.2-1.0% of zinc, measured in ZnO; 0.5-1.3% of manganese, measured in MnO; and 2.1-5.6% of calcium, measured in CaO. The fertilizer of the invention is a formula fertilizer special for Andrographis paniculata and other Chinese herbal medicines, and is also suitable for field water-flush appilication. Combining irrigation and fertilization, the fertilizer in the invention has complete nutrient component, rational nutrient proportioning and high fertilizer utilization rate, and is in line with the nutrient absorption rules of Andrographis paniculata and other Chinese herbal medicines. The fertilizer provided in the invention can promote the growth and development of Andrographis paniculata, increase output and economic benefits, raise drug effect component content like andrographolide, and can simultaneously reduce the unfavorable influences to the environment as a result of excess nitrogen application or improper fertilization, thus mitigating environmental pollution and protecting the environment.