Analysis of the Causes of Oil Running of MCL1003 Air Compressor

The middle cylinder gas leakage treatment Liu Peng Li Hongsong Angang 2 blast furnace middle cylinder has different degrees of gas leakage in the past two years.

There are two reasons for this. First, the heavy metal content in the furnace exceeds the standard. Affected by the raw materials and complex chemical reactions in the furnace, a large amount of heavy metals are accumulated in the furnace, and these heavy metals cannot be discharged into the blast furnace through the taphole in time. The heavy metals in the middle cylinder are more and more gathered, and the middle cylinder is gradually jacked up. The middle cylinder is tilted up, and the large sleeve cannot form a sealing fit, and the gas leaks from the gap between the large sleeve and the middle cylinder. The second is the blast furnace and the cooling wall and composite brick in the furnace. During the long-term smelting process, different degrees of displacement occur, resulting in upturning of the cylinder and gas leakage.

Two treatment methods are adopted. (1) The large sleeve and the middle cylinder are welded together by a thin steel plate to form a steel seal. 0 is filled with a soft and elastic material at the junction of the middle cylinder and the large sleeve.

The first method is the method commonly used in many blast furnaces in China at the beginning of construction. That is, the middle cylinder and the large set are welded together during the construction of the blast furnace. The first method was used in the blast furnace repair, but after half a month, the steel ring used for sealing was gradually opened, causing a leaking gas.

According to the second method, one fixed steel ring and one movable steel ring are respectively processed before the inspection, and eight small holes are opened on the fixed steel ring, and the nut is welded on the steel ring ().

After the blast furnace is removed from the air, the air outlet is blocked to prevent the gas from leaking out. The fitter removes the four middle cylinder clamps with an electric wrench. The welder cuts the middle cylinder welding ring with a cutting torch, cleans the middle cylinder and the large set of pressure sealing parts, and grinds the pressure sealing part with an angle grinder to make the working surface smooth. smooth. Use a self-made wire remover to clean the debris between the middle and large sets. After the copper wire is peeled, it is cut into several small sections and twisted into several small strands. The hammer and the tip plate are used to fill the copper wire along the circumferential slit between the middle cylinder and the large sleeve until it is filled. Fill it up.

The asbestos rope is taken from the lead oil and then filled between the middle cylinder and the large sleeve, and the asbestos rope is tightened with a crowbar until the asbestos rope protrudes from the outer surface of the cylinder to 1 to 2 turns. Place the movable steel ring close to the asbestos rope, place the fixed steel ring on the outside, weld the reinforcing ribs in the circumferential direction on the middle cylinder and the large sleeve, and fasten the movable steel ring with an electric wrench to compress the asbestos rope. Loosen the bolt and move the movable steel ring backwards. Place two layers of asbestos rope on each side of the movable steel ring to ensure that the asbestos rope is tightly attached to the large set. Finally, the movable steel ring is fully pressed with an electric wrench.

In order to ensure the safety of the employees during the operation, a gas alarm is placed at the middle cylinder, and the axial fan is used for purging according to the amount of gas. After the blast furnace is blown, the gas leakage is detected. The gas on the tuyere platform is very small, and the gas volume at the blow pipe <100x10' basically achieves the expected effect. W13.10-44 Anyang Iron and Steel Co., Ltd. Iron Works Second Machine Repair Workshop Anyang City, Henan Province [Edit Li Wen] Analysis of the reasons for running oil Pan Xiangdong Koryo reduced. Open the air outlet's pilot valve to discharge a certain amount of lubricant. Therefore, it is judged that the lubricating oil is lost from the air line.

The main reason for the oil to run into the air line is that the independent large filter element at the inlet of the air compressor has not been cleaned and replaced for a long time, resulting in insufficient intake of the unit with a rated suction flow of 97,000 m7h, and a certain amount of oil and gas is sucked from the oil seal to cause the unit. Run the oil.

Using the short stop maintenance opportunity, the two layers of 256 0276ninix892nim filter elements at the air compressor inlet were replaced. After the operation, the tracking was observed for 3 months. No more MCL1003 air compressors were used, and the oil station was forced to concentrate the oil supply.

Since it was put into use in 2012, it has been found many times every other week that the fuel tank level will run 505L of 5~6 barrels of sea barrels and 54 barrels of oil tanks. There is no obvious leakage outside, and it is initially judged as internal leakage.

The on-site lubricating oil pressure is 0.8 MPa, and the cooling water pressure is 0.4 MPa. It is suspected that the lubricating oil may leak from the oil passage to the circulating water. Open the oil cooler guide shower valve, a small amount of lubricating oil can be seen in the circulating water. Therefore, the oil cooler is dismantled and tested, and the oil cooler has no obvious leak point. The suspected point of the oil running into the waterway can be ruled out.

Each bearing of the air compressor has an oil exhaust chimney and a nitrogen seal. The exhaust chimney has a certain amount of flue gas exhausted, but it can be judged that it is not the main reason for draining oil. Adjusting the nitrogen sealing pressure of each bearing point and the nitrogen pressure of the lubricating oil tank, and not seeing the oil running amount, there is a Chinese oil Jilin Petrochemical Company propylene guess factory Jilin Jilin City [Edit Li Wen] Qc Instrument Network is more convenient to find instruments, professional exhibitions, professional journals More bribes, 1, supply and demand information all high world machinery network world mechanical points to see more exciting content equipment management and maintenance 2013NolO

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