The nozzle has been modified. After 5 winter heating and insulation operations, the structure is simple, flexible, safe and reliable, saving materials and energy, and is easy to operate and maintain. The gas plant of the Dalian Development Zone Gas Company started construction on March 18, 1997, and was put into operation on October 28, 1999. The factory low-pressure wet vertical lifting type 10,000 m3 gas cabinet heating and insulation project is based on the winter minimum temperature of 21.2C in Dalian, the average temperature is 11C, and a steam boiler with 2tl.25MPa is used for winter heating and heat preservation operation. At the gas supply ceremony of the factory on October 28, 1999, after two weeks of operation and production, the inspection of the gas cabinet at night on November 14th revealed that the northeast corners of the two towers and three towers of the gas cabinet began to freeze. At 8 o'clock in the morning, some nozzles were found to have ice formation. It was decided to use the emergency measures of artificial ice breaking, and the steam nozzles that had not been frozen were removed, and the rubber hose was sprayed with steam. The nozzles and water seals that have been frozen are heated one by one from the south side of the gas cabinet to melt them; at the same time, the steam pressure of the power station is increased to 0.5 MPa and cannot be lowered by 0.4 MPa. This safely passes the first cooling. In this case, four times of water seals occurred during the Spring Festival. 7 Ice was solved using the first method. 1 Failure analysis According to the existing problems, the analysis considers that the reason for the water seal freezing is as follows. (1) The steam line of the three towers of the gas cabinet is connected by a horizontal steam pipe of a tower, so that the sufficient pressure of the three-column steam line cannot be maintained, and the connection structure between the pipeline and the rubber hose is unreasonable, and the condensed water flows. Poor, block the lowest bend of the rubber hose. When the temperature is lowered, the condensed water is frozen into ice, and the steam is blocked in the rubber tube, and the steam pressure is lowered, and the nozzle is clogged, so that the ice is thicker and the water is sealed and frozen. The steam nozzle of the original design of the steam pipe connection adopts the principle of ejector. After the steam enters the nozzle steam pipe through the horizontal steam pipe of each tower, the water in the water seal of the gas cabinet is reduced by the throttle pressure of the nozzle. The water pipes are drawn into the ejector to form a mixture of water vapor. During the mixing process, the steam partially condenses into water, further increasing the attraction of the circulating water. At the same time, the steam and water exchange heat, and the water vapor mixture enters the water seal through the steam nozzle to increase the temperature of the water seal to prevent freezing. In addition, the upper part of the ejector opens a 3mm: 2005~ venting hole to prevent the pressure from being too large to squirt the water seal water. The structure sees two transformation measures for the transformation measures. (1) Renovate the steam line of the gas cabinet to ensure the steam pressure of each tower. On the steam main pipe in the gas cabinet insulation wall, three vertical steam lines are respectively connected with the horizontal steam lines of each tower. Install valves and pressure gauges on the three vertical steam lines to adjust and control the steam pressure of each tower, and transform the structure of the horizontal steam pipe and the rubber hose connection, so that the condensed water in the rubber hose flows smoothly, and the solution is solved. The steam nozzle of the original design of the steam block is not ideal in operation, and the nozzle is modified (see). The working principle is that when the steam pressure is small, the steam is emerging from the No. 1 hole; when the steam pressure is increased, The airflow speed is increased. According to the characteristics of fluid mechanics, the steam flows along the straight pipe, the water inside the carrying pipe flows out, the 223 holes generate vortex ejector, and the water-sealed water enters the straight pipe for ejector mixing, so that the steam and water are mixed and injected to make the heat exchange. Accelerate, the steam condenses into water, reduces the generation of bubbles, reduces the bubble flow, increases the water seal height and sprays the steam toward the water seal side, generating water seal water flowing along the ring body of the tower body, increasing the circumferential heat exchange. Keep the water temperature away from the nozzle. The heat exchange is accelerated, and the water seal insulation effect is improved. Reformed steam nozzle structure (see). The platform horizontal pipe D = 350 steel pipe is connected with the horizontal steam pipe, and the shut-off valve is installed to facilitate disassembly and replacement of the nozzle. The vertical drop tube D = 700mm steel tube is composed of a horizontal nozzle tube and two elbows. The horizontal nozzle tube is made of D 15mm, L-350mm steel tube, and the three holes of the upper drill 06 are evenly distributed on the same straight line. The original steel pipe cut remains, considering that the steam bubbles enter the hanging ring on the next tower during installation, so the three side holes are directed toward the tower wall, thus ensuring that the air bubbles do not enter the hanging ring of the next tower to generate "gas." through,. 3 The steam pipeline and nozzle after the transformation result are proved to be simple, flexible, safe, reliable and easy to operate and maintain after 5 winter heating and insulation operations. At the same time, because the structure reduces the complexity of the original structure, the original 57 nozzles are reduced to the current 12 nozzles, saving materials and saving energy. The original daily maximum heating gas consumption is 2,200 m3 and the current 1400 m3 gas is saved. The amount is 36%, and the gas consumption can be saved around 800m3 per day. In a winter, the heating period is calculated by 120 days, which can save about 80m3. The gas price per cubic meter is calculated by 3 yuan, which can save 288,000 yuan, which is economically reasonable. (Finish) Lock cylinder,Door lock cylinders,Mortise lock cylinder Wenzhou Shenghong Metal Products Co.,Ltd , https://www.shenghonglock.com