Energy-saving technology Utilization of steam heat energy and installation of pipelines Lu Yan measures of Heilongjiang Energy Research Institute.
Category 7 51 Phantom 14 Document Identification Code Article No. 1002 1 The main reason for steam heat loss After the steam produced by the boiler is transported to the user through the pipeline, the steam is condensed by the condensing station, and the medium is connected to the Yamato pipeline and the valve equipment. Location + tight and cause leakage.
In the process of steam transportation, losses are caused due to poor thermal insulation measures. In the application of steam, some units or departments discharge condensate and cause great waste. 2 Key measures to improve the utilization of steam heat energy 2.1 Measures to improve the utilization of steam heat energy Effective use of steam can not only improve energy utilization, but also reduce the cost of production and improve the operating environment. In industrial production 1.
Steam tends to be the first power. Then use the steam after heating to improve the steam utilization efficiency. 2.2 Reduce heat loss. The effective utilization of steam heat energy is a systematic project. The causes of heat loss in the heating process are affected by many factors, such as boiler utilization efficiency. Pipeline design and installation of condensate recovery, selection of insulation layer thickness valves and steam traps, and the level of operation of the type of heat exchange equipment installed. 3 steam heating pipeline installation steam is mostly made of coal oil or natural gas heated water, so To reduce heat loss, it is not only conducive to the improvement of heat utilization rate, production cost 3.1 pipeline installation In order to use steam efficiently, during the installation of steam pipelines, attention should be paid during the maintenance process 1 to avoid leaks caused by loose installation of pipeline valves; 2, When setting up the branch pipe, the pipe should go the shortest distance to prevent the heat loss caused by the increased resistance.
After the installation of the fudao, before the thermal insulation construction is carried out, you must pay for Xiaojin 1 trial. 1 For long pipelines, you can install a vent pipe and a valve at the highest point of the Xiaoxiao before the pressure test in sections, and at the lowest point. Install the drain valve. The test pressure is 1.25 times the operating pressure.
3.2 The compensation of the pipeline is to keep the pipeline stable and in order under the working state, and to exert pressure on the pipeline when it is heated. There are several ways of pipeline thermal compensation. In addition to the common natural compensator square compensator casing compensator waveform compensator, there is a spherical compensator recently, which is very suitable for the displacement of hot water and steam heating pipelines. IIJ 3.3 The support and hanger are installed with steam and the pipeline is laid at a certain distance, and a support and hanger is required to support the insulation layer of the pipeline accessory and the weight of the medium therein, and cooperate with the compensator. Support and hanger can be divided into fixed bracket, guide bracket, movable bracket, rigid hanger and spring bracket should be equipped with roller or ball disc. At the same time, it is necessary to set fixed bracket points for fixed-plane pipelines to carry out thrust and stress check calculations. 3.4 Steam traps must be installed on steam pipelines to install steam traps. Their function is to prevent steam leakage and automatically exclude condensate, keep steam dry, and improve steam. The use of efficient saturated steam makes the so-called permanent steam trap should be set at the lowest point of the steam pipe 2 the lowest point of each pipe section cut off by the valve 3 the lowest point of the pipe section before the vertical rise. In addition, every 25, 50, downhill direction along the pipeline, with a steam trap, 4 good thermal insulation facilities to reduce heat loss. In order to prevent the heat from being distributed to the surroundings during the steam transmission process, the heat supply pipes and accessories need to be insulated outside, their role Is to improve thermal efficiency. Especially for long-distance transportation of steam, heat insulation layer is used to reduce heat loss and meet the temperature required for production and life. In addition, the insulation layer can prevent the hot coal from freezing in the severe cold season, and usually keep the pipeline from being damaged by external erosion.
Selection of thermal insulation materials Insulation materials come in many forms. When selecting, you should follow the conditions of 1 row of thermal conductivity with a small capacity test. Generally, the thermal conductivity is 0.132. Claw 4. The bulk density is below 450; Ruggedness; 4 non-corrosive tube Xiao 5 is easy to construct and convenient in price.
Insulation layer construction There are many ways to construct an insulation layer, which varies with the condition of the insulation material, but the insulation structure of various methods should meet the following conditions: 1 Ensure that the heat loss does not exceed the requirements; 4 The construction is strong and durable, and there is no damage to the operator.
3 Selection of insulation layer thickness The determination of insulation layer thickness is greatly affected by various environmental factors. From the perspective of economic insulation, the thicker the insulation layer, the smaller the heat loss and the lower the pipeline operating cost, but the greater the investment cost of the insulation layer. Therefore, it is necessary to comprehensively consider the investment and operating costs of two flash elements to determine the thickness of an economical insulation layer to minimize the total consumption.
5 The experience of steam heat energy utilization There are many factors for the improvement of steam thermal efficiency. When using it, use steam to generate heat and then heat it. 1! First use the kinetic energy of steam. Then Lizhou steam heat. Among the many factors that affect the thermal efficiency of steam, there must be pipeline transportation from the production of steam to the use of users. Therefore, the selection of the design accessories of the heating pipeline and the choice of the type of compensator must be determined after calculation, which is also to prevent accidents And effective ways to leak.
Pipe insulation mainly reduces the heat loss of steam during transportation, but insulation increases the cost. Therefore, when deciding the thickness of insulation, the economic effect of reducing heat loss and fuel saving should be considered together with the increased cost of increasing the thickness of the insulation layer. In order to make effective use of heat, it is necessary to master the operating procedures, correctly control the steam balance, and reduce venting and condensation emissions. To reduce running and dripping pipeline installation, pre-stretching should be performed according to thermal expansion requirements, and at the same time, the displacement of the sliding bearing compensator should be checked. Prevent the displacement of the steam pipe due to expansion. Occurrence of stress concentration occurs when the off-tube or runway breaks away from the bracket. Therefore, continued from page 45 1 airtight oxygen barrier effect is good.
For such a water supply system in the corpse tower, + do any treatment to meet the requirements of dissolved oxygen in the oil field water injection standard and low-pressure boiler head water standard. The evaluation of the sealed oxygen barrier effect of the system was detected by the tower finger test monitoring center of Shengli Oilfield Research Institute. The result is the following 1 sampling situation. The corrosion rate of the outlet of the water source well. The sampling time. The oxygen content analysis method before the commissioning. On May 6, 1999 2 After the device was put into production with no secondary pollution to the water body. Xinjiang Bayin Guo Leng Mongolian State Monitoring Station. Dissolved in water on May 20, 1999. According to 5749 85 drinking water quality standards, 19 of the hazardous substances index 5 were randomly selected to meet the standards, which can be non-toxic, harmless and non-polluting to the water body.
Good safety performance and convenient operation and management.
The device overcomes the shortcomings of using natural gas diesel to seal oxygen, inflammable and explosive, and the operation management realizes fully automatic unattended, which is very popular among mines.
Low cost and low operating cost.
The secondary investment of the device is only 1315 of the natural gas closed oxygen barrier system, and there is no material and energy consumption during the operation. There is almost no such cost.
4 Economic Benefit Analysis The average daily water injection volume of Tazhong Oilfield is 80,002 present floating bed 5.365 = 0.025f; the total investment of Cm3J phase 1 gauge shuttle natural gas closed system is about 150 liters and the service life is 10 years. 13 water is discharged to the atmosphere to pay 1.151 feet of natural gas. The cost of water treatment for every 3 natural gas is calculated at 35 yuan. The unit water consumption of the device in the tower is 0.025 yuan, which is the traditional method of 0.45 yuan. Reducing 3.48513 of natural gas to the outside of the atmosphere, protecting the environment and saving energy, good 5 Conclusion 2 type floating bed type sealed oxygen isolation device is a simple, practical, safe, reliable, energy-saving and pollution-free new type of sealed oxygen isolation device. The water supply system has good economic benefits, social benefits and popularization and application prospects.
1 British Charles Spato. Oilfield water treatment process. Petroleum Industry Press, Wang Hui, Sun Guangshen, June 1984. Application of polymer membrane sealed oxygen barrier technology in water injection. Oilfield 3 Li Huamin, Su Yiju, etc. Oily water injection treatment. Petroleum Industry Press, March 1992
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