Rotary kiln lining tile outside circulation cooling transformation of a try

Rotary kiln lining tile outside circulation cooling transformation of 2021 - a try 01 - 14 Hou Jianfeng 1 Zhao Xinlei 2 ( 1. Landscape group development and technology management center; 2. Ping mountain water cement co. , LTD. ) The transformation technical background is a cement co. , LTD. , two 5000 t/d clinker production line adopts & Phi; 4. 8米× 74 MB of rotary kiln, 1 # line is put into production in 2004, line 2 # for 2005. During the running of the summer, rotary kiln belting leather surface temperature up to 140 ℃, roller surface temperature of 120 ℃, the bearing temperature is higher. In order to reduce temperature, usually under the wheel inside the tank filling cooling water for cooling roller. Although has certain effect, but the wheel bearing temperature is still relatively high, soak in cold water for a long time due to the high temperature roller at the same time, the roller surface cracking caused by under the heavy load extrusion of belting leather appear different degree of flaking, bring hidden trouble to the rotary kiln, increases the maintenance costs. Maintenance costs per year on average for welding roller surface defects exceed 20 ~ 250000 yuan, after inspecting demonstration, decide on the 1 # rotary kiln intermediate roller, after a successful promotion again. Technology plan to transform, thin oil terminal 2 by oil tank, oil pump device, filter, shell and tube type oil cooler and electric cabinet, instrument panel, pipe, valve, etc, as shown in figure 1. Work, sucked out by the oil pump from the fuel tank, the one-way valve, double barrel type oil filter, shell and tube type oil cooler is directly sent to the lubrication part of the equipment ( See figure 2) Lubrication for relative motion parts and take sports wear metal particles by magnetic filter, remove magnetic iron filings and abrasive, back to the fuel tank, form a thin oil circulation lubrication system, first of all to keep rotary kiln of each roller bearing the original form of lubrication oil pool, increasing a lubricating oil circulation cooling system design. To guide roller bearing lubricating oil into outside for cooling, then cooled to room temperature or lower temperature of the lubricating oil to import the roller bearing inside to cool the bearing shell. Roller bearing lubrication of the kiln outside circulation cooling system, a total of two or three each one, each lubrication system to each belting leather on four roller bearing oil. Each system consists of the following parts: a thin oil terminal and a thin oil terminal control cabinet, circulating oil in and out of dilute oil station main line, circulating oil in and out of the roller bearing branch pipe ( Including the valves) Cooling water, thin oil station in and out of the pipe ( Including the valves) 。 Thin oil terminal and control cabinet arrangement under the kiln pier. Figure 1 working principle of the thin oil terminal figure 2 oil pipeline dilute oil pump station cooling lubricating oil extracted from the tank after tank through the filter and into the oil cooler main line, cooling and lubricating oil through oil supply pipe main into four oil pipeline, and then through the center of roller bearing seat cover holes directly into the bearing seat on the oil pan, through the flow of oil pan to supporting axle and wheel, axle and wheel cooling. After heat of high temperature lubricating oil within the bearing seat, by the lateral bearing end cover under the connection of the return pipe overflow, through the oil return pipe packed into the oil return pipe main, then through the thin oil terminal oil return filter flow back to dilute gas station within the tank. Thin oil terminal circulation cooling water from the water supply pipe main plant cooling water, after heat flow and the main line, the water is not Shared with roller bearing. Dilute gas station work pressure range is 0. 15 ~ 0. 4 MPa, experiment with heavy duty gear oil and heavy load gear oil, 680 460 680 gear oil dilute gas station caused by oil pump motor over-current jump stop, using 460 gear oil pump motor didn't jump stop, decided to choose 460 gear oil. Third, reforming practice, to ensure that test, efficacy, and safety decision in 1 # rotary kiln using intermediate roller. In order to ensure enough quantity of lubricating oil, chose XRZ - Type 125 rare station lubricating device, the pump flow 125 l/min, 1 tank volume. 6m³ , after use can meet the requirements of rotary kiln operation, and gradually extended to a and three file to use, as shown in figure 3. Figure 3 thin oil terminal lubrication device installation points arrangement during winter overhaul in 2018, on the 1 # kiln intermediate roller tile is reformed, in order to ensure the effect, the stationing of feed roller tile for serious consideration, give full consideration to the thin oil terminal failure of emergency, the original cloth oil and oil pan spoon of roller, the roller seat back to the position of oil in the oil window home, if the thin oil terminal outage, original roller dipper can still play a role, avoid the tile burning phenomenon, as shown in figure 4. Figure 4 dilute gas station feed pipe and oil return pipe layout, the transformation effect on March 15, 2019 after startup, use lubrication station lubrication of roller than without the use of dilute oil station temperature lubrication of wheel (8 - watt low 9 ℃, after more than a month of operation, using a thin oil terminal forced lubrication can sufficient lubrication roller, and ensure the purity of the oil temperature and oil, meet the use requirements, and roller temperature is low, roller sink without cooling water to avoid wheel quench cracking, prolong the service life of roller, lower roller maintenance cost, economic benefit is remarkable. [source: 'cement' in 2019