The Anyang East Air Compressor Station is based on the overall development plan of the company's product structure. It is determined that the amount of compressed air required for the construction scale of 6.3 million t/a, 7.5 million t/a of steel and 7 million t/a of steel will be established by the end of 2007. Designed, according to the balance of supply and demand of compressed air, by the end of 2005, 120t converter-furnace rolling mill, 1 After the project of 360m 2 sintering machine and 12200m 3 blast furnace was launched, the compressed air had a gap of 756m 3 /m in. By the end of 2007, after the completion of the overall development plan of Anyang Iron and Steel, the compressed air had a gap of 1187m 3 /m in. There are 5 2D12-100/8 piston air compressors in the new area 1 air compressor station, 5 open and 3 running, the air supply capacity is 300m 3 /m in, and there are 8 2D12-100 /8 pistons in the rolling station 2 air compressor station. Air compressor, 8 open 5 operation, gas supply capacity is 500m 3 /m in, 3 air compressor station is located in the red line of 120t converter-furnace rolling mill, must be dismantled in 2004, the scale of the new eastern air compressor station is determined to be 1200m 3 / m in. The scale of the air compressor station is 800m 3 /m in and the pressure rating is 0. 9MPa, to meet the company's gas requirements by the end of 2005, while considering the overall development of the company, the plant reserves the development of two machines. The gas supply mode of the 1 station area pipe network adopts the double mother pipe according to the safety and reliability of the compressed air supply and the balance of the gas consumption of the new zone and the rolling zone. The design of the gas supply mode of the pipe network of the station area adopts double mother pipes. A mother tube is supplied to the 2200m 3 blast furnace, 360m 2 sintering machine and coke oven area, and the high-line unit of a refinery and rolling mill is connected to the air-pressure pipeline of the new area 1 air compressor station; the other main tube is supplied to the south for the second steelmaking, Users of rolling mills such as 120 t converter-furnace rolling mill are connected to the DN300 compressed air pipeline in the rolling zone by the D original plate factory at the cold drawing unit of the four rolling mill. From the outlet of each air compressor, it is divided into two branches, which are respectively connected with two mother pipes. The branch road is equipped with a valve to control which mother pipe is supplied to the mother pipe. According to the different compressed air consumption in the new zone and the rolling zone, which ones are determined The machine supplies gas to the new area, and which machines supply gas to the rolling section. The process flow is as shown. The utility model has the advantages of solving the problem of low gas supply efficiency of single mother pipe and realizing the purpose of mutual backup of all air compressors, and the three-station network provides conditions for gas supply regulation of the pipe network, and also improves the safety of gas supply of the company. , economy, reliability. 2 compressor model selection The main basis for the selection of compressor models is the field conditions of the compressed air station determined by the general plan and the economic and technical performance and investment of the unit. The general map determines that the compressed air station is 80m 50m, and there is still room for development. The piston model obviously cannot adapt to the site layout conditions. After comprehensive consideration, it is determined that the selected exhaust volume is 400Nm 3 /m in and the rated exhaust pressure is 0. 8M Pa (G) centrifugal compressor unit. Compared with the domestic and imported units of the same specifications, the domestic units have a small one-time investment, but the main engine consumes a large amount of electricity, the operating cost is high, the compressor vibration is relatively large, the noise is large, and it is difficult to control, and the failure rate is high. The imported model is compact in design, small in floor space, and the oil cooler is installed in the base. It is easy to disassemble and maintain. The center distance between the two compressors is generally 7m, while the cooler and oil cooling between the various specifications of the domestic centrifugal air compressor of the same specification. The devices are arranged separately, occupying a large space, and the center distance between the two machines needs to be more than 10m. According to the site conditions determined by the plan, if the domestic centrifugal air compressor is selected, only 4 machines can be arranged. The first stage of the project is three machines, and the position of the standby machine is 72m 18m 15m (length, width and height). There is no room for development. The imported machine building is: 54m 15m 13m (length, width and height), and the development side has a large room for development. After comprehensive comparison, it is determined to use the imported centrifugal air compressor. Determination of the air intake filter mode before the 3 machine For the centrifugal air compressor, the air intake filter efficiency is directly related to the safe and reliable supply of the compressor. If the dust removal effect of the air intake filter is poor, the impeller dust collection speed will increase, causing The vibration of the unit exceeded the standard, which shortened the maintenance period of the unit and affected the normal air supply. The location of the Eastern Air Compressor Station was built in the fourth group of the steam transportation company according to the company's plan. It is adjacent to the oxygen tanker tank area in the west, the newly built Dongshui water purification station in the south, and the 14000m 3 /h oxygen generating unit in the east. For Shengli Avenue and 2200m Class 3 blast furnace, the overall environment is good and the traffic is convenient. Based on the actual situation of the high dust content of the iron and steel enterprises and the requirements of the centrifugal air compressor impeller, the dust particle size of the intake air is not more than 2 m. The use of the unit's own two-stage high-efficiency dry filter alone will result in a short maintenance cycle and reduce the safety and reliability of the gas supply. Through the inspection of the same type of unit users, combined with the conditions of the environment of the station, the design of the low-pressure pulse bag air filter is designed for coarse filtration, and the secondary high-efficiency dry filter equipped with the compressor is finely filtered to meet the filtering requirements. Efficiency 99.5%, particle size 2 m filtration accuracy requirements. The air intake filtering method can not only meet the requirements of the compressor intake filter precision, but also greatly increase the maintenance period and service life of the secondary fine filter and reduce the running cost. When the compressor is ordered, the increased low-pressure pulse bag air filter has a requirement of 1.2 kPa resistance loss, so that the design of the intake pressure can be considered to ensure that the air compressor meets the exhaust pressure and the displacement. Claim. 4 circulating cooling water system uses ion high-pressure electrostatic water processor circulating cooling water system using ion high-pressure electrostatic water processor instead of traditional chemical treatment of circulating water. The ion high-voltage electrostatic water processor is composed of an ion bar electrode, a high-voltage power generator, a pipe, and the like. The working principle is that when the treated water flows through the water processor, the processor can generate a high-voltage electrostatic field of about 7500 12000V. Under the action of the electrostatic field, the water molecules are aligned in a chain-like order in the order of the positive electrode and the negative electrode. For example, when the water contains ions that dissolve the salt, these cations and anions will be surrounded by dipoles due to the action of static electricity, and will also be arranged in the order of the positive electrode and the negative electrode in the water dipole group so that they cannot move freely. It is impossible to approach the wall, preventing the cations contained in calcium and magnesium from tending to the wall, thereby achieving the purpose of preventing scale and descaling. After electrostatic treatment, active oxygen will be produced in the water, so it will produce a thin oxide film on the metal surface in the scale-free system to prevent corrosion, and in the fouling system, it can destroy the electron binding force between the scale molecules, change the crystal structure, Promote the looseness of hard scale, so that the scale already produced can gradually erode and fall off. The ion bar produces a certain amount of active oxygen such as O 2 -, OH -, H 2 O 2, which can destroy the ion channel of biological cells, change the biological field of bacteria and algae, affect the physiological metabolism of bacteria, thereby killing and killing algae. The role of active oxygen can also prevent scale corrosion caused by scale and slime deposits. From the point of view of use, the ion high-voltage electrostatic water processor has the characteristics of small footprint, low energy consumption, simple operation, convenient installation, no pollution, long service life, low operating cost, and long-term benefit for one investment. 5 The drying and purification of compressed air The centrifugal compressor can ensure the production of 100% oil-free compressed air. The front air intake filter uses a low-pressure pulse bag air filter for coarse filtration and the compressor is self-contained. The dry filter is finely filtered to meet the 2 m filtration accuracy requirements, ensuring the user's requirements for compressed air quality. Based on the special circumstances of the site layout, the conditions for the upper drying and purification facilities are not available. The compressed air required by the user for the instrument and control equipment requires a dew point temperature of -40? The filter has a precision of 1 m and no oil. For such special requirements, the user has taken measures to prepare the drying and purifying device. The station supplies 100% oil-free, 2 m filtration precision saturated compressed air, which provides good air intake conditions for the drying and purifying device, and considers the dispersibility of the gas points of the instrument and control equipment. The gas supply method of the purification facility is also economical, convenient and feasible. 6 Conclusion The design of the compressed air station strives to be economic, reliable and advanced in terms of process and equipment. Its operation can fundamentally solve the bottleneck problem of the company's compressed air supply. From the perspective of the economic supply of compressed air, the upper freeze dryer is externally It is more reasonable to carry out drying for compressed air, and it can also reduce the maintenance period and update rate of gas equipment.
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