Great significance.
1 Causes of scale generation The requirements for the quality of air compressor cooling water have the following indicators: the water quality is neutral, that is, the hydrogen ion concentration, the value is 6.57.5; 3 the suspended matter + greater than 25 is the machine contains 1 251 Therefore, the requirements for the air quality of the air compressor must be clean and free of impurities. The water quality is neutral. The dirty water and acidic water cannot be used. The quality of the water used in any cooling system is not constant during the operation of the system. Vaporization corrosion Chemical and temperature changes. Ventilation, scale and microbial formation all affect the composition of water, especially for water with a temporary hardness. When the water temperature exceeds 40, 3 inches, the salt precipitation in the water is intensified. The cooling surface will foul and cause the flow to decrease. The heat transfer efficiency is reduced and eventually the system is damaged. Therefore, the cooling water supply temperature is not higher than 30. The drainage temperature is not higher than 40. In individual hot climate areas or when the temporary hardness of water is low, the water supply and drainage temperature can be slightly higher than 5 2 scale removal method. It is ideal to form a thin layer of uniform calcium carbonate on the inner surface of the cooler, which plays a role in anti-corrosion, and usually the scale thickness is not allowed to exceed 2, but the scale of the scale is too large to block the pipeline and affect the heat transfer efficiency. Safe and economic operations have a large impact and must be removed. When the screw press of the air compressor station is running for 23 months, the cooler will be blocked and cannot be driven normally. The initial cleaning method is to remove the cooler, use the impact drill, use the square steel to make the drill bit, and cool it with water. Drilling, time-consuming, and labor intensive, and frequent damage due to continuous operation of the impact drill.
34 air compressors are required for normal air supply, so as to ensure normal wells. 10S production, every month in the money and extremely easy to leak water pipes appear oil phenomenon, resulting in the entire cooler scrapped. Each air compressor has to replace the new cooler every six months, and each cooler is worth more than 20,000 yuan, which not only affects production but also causes serious economic losses.
We use the super water tanker lotion produced by Ingersoll. This cleaning agent is mainly used for the removal of scale in the compressor water circulation double system pipeline, and the cleaning agent contains high-efficiency corrosion inhibitor to make it different materials. The pipe wall does not cause chemical damage, which is safe and efficient.
The specific cleaning method uses the 012570 type wind-driven sand discharge sewage chestnut produced by Changzhou Peace and Mining Equipment Factory. The container is made according to the size of the pump. It is directly connected with the pressure fan inlet and outlet pipes through the valve control. According to the different degrees of scale and dirt, Dilute the cleaning agent 35 times, such as, the giant heating to about 6, 1 cleaning, the effect is better, cycle cleaning, every 30 out, test, test paper, if the value is greater than 7.5, then add some cleaning agent stock solution, Make 1 small 7.5, repeated several times. When 1 to 15 is kept below 7.5, the cleaning agent can be neutralized, and the pipeline is washed with water to wash the residue. The effect is passed through the cleaning of No. 5 air compressor cooler at R&F Mine Air Compressor Station. The effect is quite different, no need to disassemble the radiator, only one person every 3, 1 mountain 1 plus cleaning agent and test with test paper can save time and effort.
4 The above is the author's experience in the removal of scale in the use of water-cooled air compressors. With the development of science and technology, the water softening is highly intelligent and highly reliable, and the formation of scale or scale will be eliminated from the source. The degree of control is within 2, to improve the use of the cooler and the service life of the mechanical engineer of the Heilongjiang Hegang Mining Bureau. He is currently the deputy chief of the Fuli Coal Mine of Hegang Branch of Heilongjiang Province Longgang Group.
Received date 20722 edit Hu Qi on the 54th page of the geomembrane anti-seepage performance is the key to success, so be sure to do the welding of the film. Make sure the quality of the weld is therefore. Geomembrane welding, the manufacturer sends professional and technical personnel to the on-site operation guidance training, using geomembrane special welding equipment. The geomembrane welding of this project uses two 210-type heat sealing geomembrane welding machines, and the geotextiles are stitched by hand-held sealing machine. The welding process of the two-film composite geomembrane welding process of this project will be welded after the first geomembrane is laid. The width of the side is about 6, and the first one is laid back on the first film, and the two pieces are adjusted. Join the side, walk, and make 2 laps.
Before welding, use a hair dryer to blow off dirt such as sand and dirt on the membrane surface to ensure that the membrane surface is clean. The mat is placed on the bottom of the welded part so that the welder can walk on the flat base surface to ensure the welding quality. Before the formal welding. According to the construction temperature, the test welding, determine the walking speed and the welding temperature, the general control, the degree of 1.512.5, the welding temperature is 22030, the quality of the pinned solid, is related to whether it can form a closed anti-seepage body, the lower anchor It should be completed after the construction of the anti-seepage body is completed and approved by the supervisor. The anchoring of the composite geomembrane to be laid on the slope is carried out, and the pouring of the protective layer is completed.
5 protective layer and wool stone laying stock, 1 thick protection 9 4 soil materials to be screened. +Allow the grain to cry people, the particles are easy to puncture the Shigong wrist to protect Shanghai nine, the soil material must be beaten dense, to ensure that the dry weight is above 1.5, and sampling and testing at any time. When laying protective layers and laying masonry facings. Be sure to put it lightly so as not to break the geomembrane. Under the stone face, 20 thick gravel cushions are placed to prevent the soil protective layer from being affected by factors such as water level changes, wind waves and other factors. The stone is laid by artificial hanging lines, and the stone should be tightly embedded.
4 After the use effect is put into use, the effect is good. The self-gram solves the leakage problem, and satisfies the water storage function and plays the role of beautifying the environment, and greatly saves investment.
graduation. engineer. The design institute of Leping Mining Bureau is now engaged in civil engineering design work.
Received 2010715 edited Hu Zhongqi
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