In the context of the dual carbon goal, the relevant state departments continue to improve policies to promote energy conservation, environmental protection and green development of the steel industry, and the steel industry has also shifted from cost competition to comprehensive strength competition. In order to actively respond to the severe market situation, Xinda steel companies grasp the opportunity of the acceleration of the process of rare gas localization, strive to develop and expand the industrial chain, take fine management as a means, gain momentum, and continue to reduce costs and increase efficiency, management improvement, etc., to help the Group win the annual closing war.
Rare gas applications are mostly high-tech fields, at present, the entire global market demand for rare gases is also showing a growing trend, the lowest content of rare gases krypton and xenon in the air, due to the complex extraction process, high price, with very considerable economic benefits, known as "gold gas". Hebei Xinda Iron and Steel Group Co., Ltd. pays close attention to the noble gas market, under the premise of ensuring the gas supply of the main steel industry, deeply digging the internal business advantages, investing in the research and development of high-end products, cultivating high-end customers, and gradually integrating the rare gas crude extraction project into the strategy of promoting the healthy development of the company.
After the raw material is extracted from the raw material tank, the liquid oxygen pump is pressurized into the fractionating tower, and enters the middle of the rectification tower to participate in rectification. The krypton-xenon concentrated liquid oxygen is obtained from the bottom of the rectification tower, and the rich oxygen is extracted from the top of the rectification tower, and part of it enters the condensing evaporator, which is liquefied into liquid and sent back to the rectification tower to provide liquid for rectification. The other part is pumped out of the cooler. The pressure nitrogen enters the fractionating column, is first cooled to the dew point temperature by the main heat exchanger, and is sent to the reboiler located at the bottom of the rectification column to provide a heat source for rectification, and is itself liquefied into liquid nitrogen. Liquid nitrogen is throttled and distributed into the condensation evaporator at the top of the tower to provide a cold source for rectification. After being vaporized, it enters the main heat exchanger to be reheated to normal temperature, and is sent to the circulating nitrogen compressor for pressure reuse to produce krypton xenon products with qualified purity. Since the trial production in April, the cumulative takeaway crude krypton xenon liquid 448.7 tons, sales of about 5.313 million yuan.
Hebei Xinda Iron and Steel Group Co., LTD
Cryogenic liquid products, as a by-product of the air separation industry, have always been a strong profit point of Hebei Xinda Iron and Steel oxygen production plant, and all employees continue to devise practical plans and carry out in-depth analysis and full demonstration on how to increase the output of cryogenic liquid. In order to "do a good job in the topic research, in the in-depth effort" as the center, in view of the difficult problems in the production process, the focus of the problem, vigorously strengthen the topic research, and adhere to the principle of "the topic is the problem", "the result is the way", "the research will be effective", and put forward practical suggestions for improvement.
Under the premise of ensuring the qualification of the main cooling hydrocarbons, the oxygen plant should reasonably adjust the working conditions, increase the amount of expanded air, produce more liquid oxygen and liquid argon and store them for export, reasonably adjust the gas-liquid output ratio of the unit, increase the liquid output in the stage of small gas consumption, and bring considerable liquid sales profits for the company. The average nitrogen purity of each unit was improved, the oxygen content of each unit was reduced, and the oxygen extraction rate was increased by fine-tuning the working conditions. From January to November, 5,155.2 tons of takeaway liquid argon was accumulated, with sales of about 3.509 million yuan.
Jilin Xinda Iron and Steel Co., LTD
In order to further increase the output of liquid argon products and reasonably adjust the working conditions, the energy power plant of Jilin Xinda Iron and Steel Co., Ltd. actively organized the technical backbone of the oxygen production area to study the rectification conditions of the argon system and optimize the operation of the rectification conditions of the argon system. In view of the phenomenon of nitrogen blockage in the fine argon tower and crude argon tower, a research team headed by Deputy plant director Liu Yiming was established to determine that the exhaust gas of the fine argon tower could not be opened due to the fault of the exhaust gas vent check valve. Therefore, replace the check valve immediately to solve the nitrogen plug problem of the fine argon column.
At the same time, it is found that a slight nitrogen plug in the crude argon column will also lead to a decrease in liquid argon production. Since the liquid-air purity can only be obtained through manual testing, which is inconvenient for personnel to observe at any time, the research team immediately installed the liquid-air purity analyzer, and finally solved the problem of nitrogen plug in the crude argon column by adjusting the liquid-air purity at any time, combining the purity of oxygen and the purity of argon fractions, and adjusting the working conditions. As the operators gradually explore the working conditions, they have mastered the daily operation of the argon system and the treatment methods of abnormal phenomena, adjusted the working conditions to the best state, and maximized the liquid argon production.
The energy power plant should strengthen the monitoring of liquid argon product storage tank, adjust the tank pressure reasonably, and reduce the vaporization loss of liquid argon storage tank. Learn from the production control methods of other enterprises, change the previous operation mode of one operating another inert conversion argon pump, and shut down the standby liquid argon pump to avoid the evaporation loss of liquid argon products caused by inert conversion of liquid argon pump. Under the guarantee of the pressure of the air compressor and the normal load of the molecular sieve, the qualification of the main cooling hydrocarbon is reached. From January to November, the cumulative takeout liquid argon 6,680 tons, according to the current liquid argon per ton price of 1,000 yuan calculation, sales of about 6.68 million yuan.
All cadres and workers of Hebei Xinda Iron and Steel Oxygen plant establish a sense of crisis and responsibility, uphold the idea of "tight days and hard days", take problems as guidance, and promote cost reduction and efficiency. Aiming at the problem of how to control the cost of monoxy within 0.32 yuan /m³ and reduce the comprehensive cost of oxygen production, the index and task of decomposition cost reduction and efficiency improvement are gradually refined. According to the status quo that the amount of oxygen and nitrogen used is relatively small and the amount of release is relatively large, under the premise of ensuring the stability of oxygen and nitrogen used in steelmaking and ironmaking, the resistance of air compressor inlet filter is reduced, and the opening of air compressor inlet guide vane is turned off, so as to reduce the power load of air compressor and extend the service life of equipment.
After coordination and communication with relevant departments and production units, the oxygen general plant started the low-power oxygen permeation instead of the high-power oxygen permeation operation of the unit, effectively reducing the power consumption of the equipment; Close the inlet and return water valve of the unit cooler, and stop the operation of a circulating water pump to save the power consumption of the circulating water pump under the condition that the circulating water pressure is normal; Strictly implement the relevant measures of the company's peak-avoidance and power-saving implementation plan, and use liquid oxygen pumps to replace piston oxygen presses during peak and peak periods of electricity consumption. At the same time, the pressure swing adsorption unit according to the actual situation of oxygen to implement peak avoidance measures to save power consumption. From January to November, the average comprehensive cost of oxygen production in the oxygen plant was 0.3179m³/ yuan, and the average value of actual completion was 0.2885m³/ yuan. It is estimated that the cost saving was about 33.5 million yuan.
Strength depends on performance verification, and performance depends on hard work. Hebei Xinda Group will adhere to self-reliance, find the main direction of attack, to break through the conventional courage and courage, solid and powerful measures to reduce costs and increase efficiency, to the production organization process to ensure that the key indicators to take new breakthroughs. Optimize and upgrade rare gas manufacturing equipment and processes, expand the market share of rare gases, and create a new engine for economic growth. In the key areas of development, core capabilities, structural adjustment and efficiency, main indicators promotion, key technology transformation, so that Xinda's "fist" harder, more advantages, higher efficiency, better benefits, decisive closing battle, play a good opening chess!
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