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ZHONGYI GAS TECHNOLOGY

14

2019-06

Adding new gas sources to the West-East Natural Gas Pipeline ensures the rapid growth of demand

Well Keshen 902, China's first onshore natural gas production well with a depth of more than 8,000 meters, has been put into operation recently, delivering 400,000 cubic meters of natural gas per day, adding a new gas source to the west-east natural gas pipeline. The Keshen 902 well, located in Baicheng County, Xinjiang Province, is the first and deepest natural gas well to be put into operation on land in China. The production of this well will promote the development of ultra-deep oil and gas resources in Tarim Oilfield, which is of great significance to the construction of 30 billion cubic meters of atmosphere in Tarim Oilfield and the guarantee of China's energy security. Tarim oilfield is one of the main gas sources of west-east natural gas transmission. In recent years, with the increase of gas consumption in the lower reaches of west-east natural gas transmission and gas consumption in the pipeline network of natural gas benefit project in southern Xinjiang, Tarim oilfield continuously strengthens oil and gas exploration and strives to ensure the gas supply. By the end of 2017, the total gas supply from the oilfield to the east exceeded 200 billion cubic meters. Opinions of accelerate the natural gas utilization, points out that natural gas will be to be one of the main energy of our country's modern clean energy system, by 2020, natural gas in primary energy consumption structure in proportion to about 10%, to 2030, strive for the natural gas in primary energy consumption proportion increased to 15%. The guideline on energy work in 2018 calls for China's total energy consumption to be capped at around 4.55 billion tons of standard coal. The proportion of non-fossil energy consumption and natural gas consumption will rise to around 14.3 percent and 7.5 percent respectively, and the proportion of coal consumption will drop to around 59 percent. According to data released by the National Development and Reform Commission, in April 2018, China's apparent consumption of natural gas was 22.13 billion cubic meters, up 16.7% year on year; The cumulative apparent consumption of natural gas from January to April was 91.13 billion cubic meters, up 16.7% year on year. The main reasons for the steady increase in consumption are the steady progress in replacing coal with gas, the recovery of the macro economy and the high price of alternative fuels.

2019-06-14

14

2019-06

Liquid oxygen liquid nitrogen all the way red behind the reason is...

Nitrogen trifluoride at room temperature is a colorless, odorless, stable gas, is a strong oxidant, nitrogen trifluoride is mainly used in fluorine agent, combustion agent, propellant oxidant, high temperature metal cutting oil, etc., widely used in the semiconductor industry. However, in the early years, the related products were monopolized by foreign countries, and the market pricing power was in the hands of foreign manufacturers. In order to break the monopoly crisis and seize the market opportunity, China successfully developed high purity nitrogen trifluoride in 2009. The products are listed in the national "key new products" and "torch plan", applied in most of the domestic semiconductor, liquid crystal, solar energy industry, and exported to the United States, Japan, France, Germany and other countries. At present, China has built the largest domestic nitrogen trifluoride and other products R & D production base. The coverage rate of nitrogen trifluoride in the domestic market is more than 95% and that in the international market is 30%. In the past two years, the annual growth rate has reached 30%, and we strive to achieve an annual output of 12,000 tons of high-purity nitrogen trifluoride gas by 2020. China's electronic gas is still a short board in the development of electronic materials, need to focus on development. At present, the production of high purity nitrogen trifluoride gas can meet the domestic demand. With the development of semiconductor electronics industry, it is not known whether the production of high purity nitrogen trifluoride gas can also meet the development of the industry. Therefore, although the production of high purity nitrogen trifluoride in China has made a breakthrough, whether it can really reduce the market price is still a problem!

2019-06-14

14

2019-06

China's wind and photovoltaic power generation into the bidding era may trigger a major industry shake-up

"The most market-oriented policy in history" China's wind power photovoltaic power generation into the bidding era "The opening of competition, new energy price decline is an inevitable trend, very likely to promote a new round of industry reshuffle." On June 2, an industry source from Ningxia, China's first comprehensive demonstration zone for new energy and the first pilot region of the auxiliary power service market in Northwest China, said that newly announced wind power and photovoltaic power generation projects will adopt competitive configuration, giving priority to projects with low subsidy intensity and strong slope regression. The New Deal is bound to affect business investment enthusiasm On May 30th, the National Energy Administration issued "about 2019, wind power, photovoltaic power generation project construction related matters notice, clear wind power, photovoltaic power generation project is divided into two categories, do not need to state subsidies and need state subsidies, in power grid enterprise organization the demonstration of the power project and implement the parity, send out and based on the given condition, promoting the construction of parity project priority, start to state subsidies on the competition project configuration. A person in charge of the new energy department of the bureau said the purpose of the move is to improve the competition allocation mechanism of projects that need state subsidies and reduce the dependence of industry development on state subsidies. This year, the general direction of wind power and photovoltaic power generation is to "adhere to the general keynote of seek improvement in stability, speed up technological progress and reduce the intensity of subsidies, do a good job in coordinating project construction and consumption capacity, and achieve high-quality development". This is known as the "history of the most market-oriented" policy, marking the country's wind power photovoltaic into the bidding era. Since the "13th Five-Year Plan", the application scale of wind power and photovoltaic power generation in China has been expanding, the technical level has been significantly improved, and the cost has gradually decreased. But at the same time, the subsidy gap continues to expand, some areas abandoned wind and light power rationing and other problems are prominent. The latest figures show that the installed capacity of new energy in Ningxia's power grid is about 15 million kilowatts, accounting for 49% of the power generation and 102% of the electricity load. It has become the first provincial power grid in China where the output of wind power and photovoltaic power exceeds the power consumption of the whole region. From 2013 to 2018, the average annual growth rate of wind power installed capacity was 27%, photovoltaic installed capacity was 40%, and new energy installed capacity was 32%, ranking second in the country. An expert from the Ningxia New Energy Research Institute, who declined to be named, said that the fierce competition among energy investment enterprises is mainly reflected in the competition of feed-in tariff. As the price of electricity drops, the return on investment will also decrease, which will inevitably affect the enthusiasm of enterprises to build photovoltaic power stations. On the other hand, some photovoltaic power generation enterprises have to invest by selling power stations in order to digest their production capacity, which also has a great impact on their enthusiasm to build power stations. The main reason is that the price of photovoltaic construction has dropped significantly in recent years, and the decrease of equipment price leads to the decrease of investment cost. The expert said the initial set price was as high as 20 yuan per watt, but dropped to a minimum of 1.6 yuan per watt last year. "This also means that the electricity price to a low level, two years ago the lowest electricity price in Ningxia is 0.55 yuan, now open up the competition, it is estimated that it will reach 0.35 yuan or so, basically close to parity." He admits.

2019-06-14

14

2019-06

"Weakness" hard carbon aerogels seem to have a lot of power

Recently, a research group led by Professor Shuhong Yu from the University of Science and Technology of China, inspired by the high strength and elasticity of natural spider webs, has skillfully prepared a series of hard carbon aerogels with a network structure of nanofibers through the template method. This series of aerogels has the advantages of super elasticity, fatigue resistance and good stability. The research results were selected as the back cover of the paper published in Advanced Materials. Aerogel is sometimes referred to as "solid smoke" or "frozen smoke" because of its translucent color and ultra-light weight. Aerogel looks fragile, but it's actually very strong and durable. It can withstand thousands of times its own mass and does not melt until temperatures reach 1,200 degrees Celsius. It also has low thermal conductivity and refractive index, and insulation that is 39 times stronger than the best glass fiber. Because of these properties, aerogel has become an irreplaceable material for space exploration. Both the Russian Mir space station and the American Mars Pathfinder spacecraft have used it for thermal insulation. Carbon materials can be roughly divided into graphite carbon, soft carbon and hard carbon according to the different hybrid orbitals of carbon atoms. Soft carbon and hard carbon are mainly used to describe carbon materials prepared by polymer pyrolysis. During the pyrolysis process, some carbon atoms reconstitute two-dimensional aromatic graphene sheets. If these graphene sheets are roughly parallel, they are prone to graphitization at high temperatures. If these graphene sheets are stacked randomly and cross-linked by edge carbon atoms that cannot be graphitized at high temperatures, the carbon is called hard carbon. Generally speaking, graphite carbon and soft carbon have high elasticity, easy to deformation, but low strength; Due to the existence of the "house of cards" structure on the microstructure of hard carbon, the hard carbon material shows great advantages in mechanical strength and structural stability, but the intrinsic nature is brittle and fragile. How to prepare hard carbon material into super - elastic block is a challenge at present. By using resorcine-formaldehyde (RF) resin as the hard carbon source and using a variety of one-dimensional nanofibers as the structural template, the researchers prepared RF nanofiber aerogels, which were superelastic hard carbon aerogels obtained by carbonization at high temperature. This hard carbon aerogel has a fine microstructure and is made up of a large number of nanofibers and the weld joints between them. This method is simple, efficient and easy to scale production. By adjusting the addition amount of template and resin monomer, the diameter of nanofibers, the density of aerogel and the mechanical properties of the nanofibers can be easily controlled. Unlike traditional hard carbon blocks, which are hard and brittle, this kind of hard carbon aerogel shows excellent elastic properties, such as stable structure, microstructure can still recover after compression by 50%. The rebound speed is higher than that of many graphite-carbon-based elastic materials; Low energy loss coefficient, general graphite and soft carbon materials in the existence of intermolecular forces, will cause adhesion and friction force and dissipate a lot of energy; Fatigue resistance. After 104 cycles of testing at 50% strain, the carbon aerogel showed only 2% plastic deformation and maintained 93% initial stress. The researchers have also explored the application of this hard carbon aerogel in elastic conductors where resistance is almost constant after multiple compression cycles at 50% strain, demonstrating stable mechanical-electrical properties while maintaining hyperelasticity and resistance stability under harsh conditions, such as in liquid nitrogen. Because of its excellent mechanical properties, this kind of hard carbon aerogel is expected to be used in stress sensors with high stability, large range, stretchability or bendability. In addition, this method can be extended to prepare other non-carbon based composite nanofiber aerogels, providing a new way to convert rigid materials into elastic or flexible materials by designing the microstructure of nanofibers in the future.

2019-06-14

10

2019-06

The operation of argon production in air separation unit is complicated.

Total rectification of argon is to separate oxygen from argon in a crude argon column to obtain crude argon with oxygen content less than 1×10-6 directly, and then separate it from fine argon to obtain fine argon with purity of 99.999%.   With the rapid development of air separation technology and the demand of market, more and more air separation units adopt the process of producing argon without hydrogen to produce high purity argon products. However, due to the complexity of argon production operation, many air separation units with argon did not lift argon, and some units in operation of argon system were not satisfactory due to the fluctuation of oxygen use condition and the limitation of operation level. Through the following simple steps, the operator can have a basic understanding of producing argon without hydrogen!   Commissioning of argon making system   * V766 in full opening process before discharging coarse argon column into fine argon column; Liquid blowout and discharge valves V753 and 754 at the bottom of crude argon tower I (24 ~ 36 hours). * Full opening process argon out coarse argon tower I defining argon tower valve V6; Non-condensing gas discharge valve V760 at the top of the argon tower; Precision argon tower, liquid blowing at the bottom of precision argon measuring cylinder, discharge valves V756 and V755 (precooling precision argon tower can be carried out at the same time as precooling coarse argon tower).   Check the argon pump   * Electronic control system -- wiring, control and display are correct; * Sealing gas -- whether the pressure, flow, pipeline is correct and does not leak; * Motor rotation direction -- point motor, confirm the correct rotation direction; * Piping before and after the pump -- check to make sure the piping system is smooth.   Check the argon system instrument thoroughly   (1) Rough argon tower I, Rough argon tower II resistance (+) (-) pressure tube, transmitter and display instrument is correct; (2) Whether all liquid level gauge (+) (-) pressure tube, transmitter and display instrument in argon system are correct; (3) Whether the pressure tube, transmitter and display instrument are correct at all pressure points; (4) Whether the argon flow rate FI-701 (the orifice plate is in the cold box) (+) (-) pressure tube, transmitter and display instrument are correct; ⑤ Check whether all automatic valves and their adjustment and interlocking are correct.   Main tower working condition adjustment   * Increase oxygen production under the premise of ensuring oxygen purity; * Control the lower column oxygen-rich liquid empty 36 ~ 38% (liquid nitrogen restricts into the upper column valve V2); * Reduce the expansion amount under the premise of ensuring the main cold liquid level.   Liquid in coarse argon column   * On the premise of further precooling until the temperature of the argon tower no longer drops (the blowout and discharge valves have been closed), the liquid air is slightly opened (intermittently) and flows into the condensing evaporator valve V3 of the crude argon tower I to make the condenser of the crude argon tower intermittently work to produce backflow liquid, cool the packing of the crude argon tower I thoroughly and accumulate in the bottom part of the tower; Tip: When opening the V3 valve for the first time, pay close attention to the pressure change of PI-701 and do not fluctuate violently (≤ 60kPa); Obact the liquid level LIC-701 at the bottom of crude argon tower I from scratch. Once it rises to 1500mm ~ full scale range, stop precooling and close V3 valve.   Precooling argon pump   * Stop valve before opening the pump; * Blow out the valve V741 and V742 before opening the pump; * slightly open (intermittently) the pump after blowing off valve V737, V738 until the liquid is continuously ejected. Tip: This work is carried out under the guidance of argon pump supplier for the first time. Safety issues to prevent frostbite.   Start the argon pump   * Fully open the return valve after the pump, fully close the stop valve after the pump; * Start argon pump and fully open the back stop valve of argon pump; * Observe that the pump pressure should be stabilized at 0.5 ~ 0.7Mpa(G).   Crude argon column   (1) After starting the argon pump and before opening the V3 valve, the liquid level of LIX-701 will decrease continuously due to the liquid loss. After starting the argon pump, the V3 valve should be opened as soon as possible to make the condenser of the argon tower work and produce backflow liquid. (2) V3 valve opening must be very slow, otherwise the main tower conditions will produce large fluctuations, affecting the purity of oxygen, crude argon tower after work to open the argon pump delivery valve (opening depends on the pump pressure), the final delivery valve and return valve to stabilize the FIC-701 liquid level; (3) The resistance of two crude argon columns is observed. The resistance of

2019-06-10

10

2019-06

Air separation equipment petrochemical market share doubled

From the China general machinery industry association branch of gas separation equipment, nearly three years in our country the air separation equipment market structure change in quietly, although the market is still in metallurgical industry is given priority to, but with the rapid development of petrochemical industry, fertilizer industry, air separation equipment in petrochemical industry market share has increased from 14.5% in 2002 to around 30% in 2005. In addition, the large-scale development trend of air separation equipment is more obvious, and the manufacturing technology is becoming more and more mature. It is reported that in 2005, among the 25 sets of air separation equipment above 30,000 grade signed in the domestic market, 10 sets are used in the petrochemical and fertilizer industry; A total of 39 sets of air separation equipment above 20,000 grade have been signed in the whole industry, among which 25 sets of large air separation equipment above 30,000 grade have been signed, which is the fastest year for the development of large air separation equipment market in history. Experts believe that there are three main reasons driving the large-scale development of air separation equipment in China. First, after the macro-control of the steel industry in China, the joint restructuring of the metallurgical industry has brought about new market demand. Second, the development of petrochemical and chemical fertilizer industries, especially the launch of coal-to-oil, large-scale chemical fertilizer and large-scale ethylene projects, has opened up new development space for large-scale air separation equipment. Third, the manufacturing technology of large-scale air separation equipment in China has become increasingly mature and the advantages of cost performance have won the trust of more and more domestic users. In addition, China's air separation equipment manufacturing industry has made new breakthroughs in new product development and new technology application, which has promoted the development of China's air separation equipment manufacturing technology. Among them, the hangyang co., LTD. Provide Iran with two sets of 63000 m3 / h air separation equipment is the maximum level of the current domestic self-developed air separation equipment, the device adopts the low molecular sieve purification absorption, medium voltage air pressurization turbine expander, structured packing and full of pure argon flow system technology of an internal compression process of oxygen, fill the blank of our country develop the level of 60000 air separation equipment; The 52000m3/h air separation equipment provided for the 500,000-ton/year methanol project of Zhongyuan University Chemical Co., Ltd is the largest domestically made air separation equipment in China by adopting the process of air pressurization and oxygen and nitrogen double pump internal compression. It is also reported that at present in the oxygen pressure of 4.6Mpa above the use of chemical enterprises in the air separation device, have adopted the liquid oxygen pump compression process, oxygen extraction rate can reach 95% ~ 97%, argon extraction rate can reach 70% ~ 80%, these technical indicators have been close to the international advanced level.  

2019-06-10

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