In the actual construction of cooling tower in thermal power plant, strict and correct technical awareness and quality concept should be established. The following is the model essay for master's thesis that I recommend to you, I hope it will help you. More exciting content can be found at www.oh 100.com/bylw.
Abstract: The main mode of power production in China is thermal power, which is determined by the situation of China's power industry and the actual situation of energy. In the new era, under the background of internal industry growth and external energy demand, electric power is entering the high-speed promotion stage of thermal power plant construction. Controlling the construction of thermal power plants has become an important work with industry value and development value. Considering the construction of thermal power plant from the perspective of construction quality and benefit, this paper analyzes the causes of quality hidden dangers in the construction of thermal power plant, and puts forward some countermeasures to improve quality control and do a good job in the construction of thermal power plant.
Keywords: thermal power plant; Electric power construction; Quality; Architecture; Main workshop; cooling tower
The main workshop, chimney and cooling tower are the basic projects in the construction of thermal power plants, and also the construction projects with complex technology and technology. If there are problems in the application of technology and the control of construction details in the construction, it will directly lead to a series of problems such as cracks, insufficient strength, leakage, deviation and safety in the main workshop, chimney, cooling tower and hydropower facilities of the thermal power plant, which will lead to hidden dangers in the quality of the thermal power plant construction project and make the whole thermal power plant construction project unsafe. In the construction of thermal power plants in the new era, it is necessary to strengthen the technical control and quality assurance of key projects such as main workshop, chimney and cooling tower, establish a new mechanism with the characteristics of the times and professional characteristics, and ensure the core objectives of thermal power plant construction such as cost, benefit and quality.
1 Causes of quality hidden trouble in thermal power plant construction
By analyzing the causes of quality hidden trouble in thermal power plant construction, we should grasp the construction practice of key structures and key equipment of thermal power plant in combination with the main components of thermal power plant construction projects, with special emphasis on the actual construction of main workshop, chimney and cooling tower, so as to determine the root causes of quality hidden trouble in thermal power plant construction.
1. 1 Reasons for construction quality hidden trouble of main workshop of thermal power plant
First, the foundation stability and firmness of the main workshop are insufficient, and the earthwork excavation technology is not strictly controlled in foundation construction, resulting in inappropriate foundation range, depth deviation and irregular soft soil foundation treatment, which affects the formation of foundation elevation and strength, and then affects the structural stability and use function of the main workshop; Some main workshop foundation construction units did not fully protect the foundation pit, resulting in long exposure time of the pit body and poor drainage at the bottom of the pit, which led to hidden dangers of foundation quality and safety. Second, there are quality hazards in structural treatment, especially at the beam-column joints of the main powerhouse. The position deviation, insufficient precision and structural errors between the embedded parts and the structure and formwork joints of the main powerhouse will make it difficult for the main structural strength of the main powerhouse to form design marks, and will also cause structural hazards and safety problems, which will bring risks to the use and production of the main powerhouse of thermal power plants.
1.2 causes of hidden dangers in chimney construction in thermal power plants
There are two common quality hazards in chimney construction: first, concrete surface treatment problems, such as lax control of raw materials ratio, inadequate application of concrete surface treatment technology and irregular use of concrete structure maintenance technology, will cause pulverization, cracks and pits on the chimney surface, which will seriously affect the impression, function and safety of the chimney. Second, the physical size of the chimney barrel is out of control, and the chimney barrel deviates due to insufficient foundation strength, deviation of construction control line and imprecise technical application, which leads to the torsion trend of the chimney barrel and affects the production function of thermal power plants.
1.3 causes of hidden dangers in cooling tower construction in thermal power plants
The main reasons for the quality hidden trouble in the construction of cooling tower are as follows: first, the concrete structure of cooling tower is not standardized, and construction joints and pouring joints appear, which leads to water leakage and insufficient structural strength of cooling tower. Second, the positioning of the fixed components of the cooling tower is inaccurate, which leads to the deviation and out-of-control of the physical size of the cooling tower, and it is difficult to effectively stabilize the main structure of the cooling tower. Third, the construction technology of cooling tower wall reinforcement project is not strict, and the phenomenon of insufficient reinforcement, low specification and inaccurate model appears, which directly affects the center of gravity, size and use function of cooling tower wall.
2. Improve the construction quality control and do a good job in the construction of thermal power plants.
2. 1 Improve the construction quality of the main building of thermal power plant
During the construction of the main workshop, the soft soil foundation should be reinforced, such as replacement and concrete piles, and drainage structures and facilities should be set up. Backfilling of foundation earthwork shall be done by layers and compacted by layers. Before concrete construction, the formwork should be cleaned to ensure the flatness and rigidity of the formwork surface. The mixture ratio of concrete must meet the design requirements, and the workability of construction can meet the construction requirements. In the construction of reinforcement engineering, the thickness of cushion block should meet the requirements of protective layer and the strength bearing capacity should meet the requirements. During the construction of steel bar connection, the quality of casing should meet the construction requirements, and protective casings should be set at both ends of casing to protect threads. During the construction of steel bar connection, the adaptability of steel bar specification and connecting sleeve should be ensured, and the joint must be tightened with a torque wrench. When connecting steel bars, the tightening value of the joint should meet the requirements of the specified torque value, and the torque value should be checked in time after tightening. For the steel structure in the main structure of thermal power plant, sand blasting should be used for rust removal before installation, and quality inspection should be strictly carried out. After the components are made, the primer shall be painted in time to avoid corrosion.
2.2 improve the quality of chimney construction in thermal power plants
In the construction of chimney barrel in thermal power plant, the center of the barrel should be controlled by laser level. When the chimney is eccentric, the data and direction should be analyzed and processed in time, and reasonable rectification measures should be taken to avoid the inclination of the cylinder. After the cylinder is deviated, the technical measures to correct the deviation mainly include platform inclination method, changing template slope, gantry mutual pulling and wedge pad method. In the process of chimney construction, the initial setting time of concrete should be adjusted in time according to the construction progress, climatic conditions and strength requirements, and external admixture should be used when necessary.
2.3 Improve the construction quality of cooling towers in thermal power plants
To carry out the actual construction of cooling tower in thermal power plant, we must first establish strict and correct technical awareness and quality concept, respect the design drawings of cooling tower in thermal power plant, determine the building structure and size of cooling tower in thermal power plant through accurate and complete calculation, and effectively control the position accuracy and size error of cooling tower in thermal power plant. During the sectional construction of cooling tower in thermal power plant, the sliding plate, fixing bolt and intermediary device should be inspected in time to improve the accuracy of cooling tower construction in thermal power plant. The construction of cooling tower in thermal power plant should strictly control the technical specifications, binding methods and quantity of steel bars to ensure the shape, structure and function of cooling tower in thermal power plant. In the concrete project of cooling tower in thermal power plant, key links such as raw material technical control and surface roughening treatment should be done well, and technical regulations such as water cement ratio, vibrating operation and compaction should be emphasized to avoid leakage and water seepage.
3 Conclusion
Thermal energy is the most important form of electric energy. Strengthening the capital construction of thermal power plants and carrying out capacity expansion and transformation of thermal power plants are the basis for the realistic growth of electricity, long-term economic development and long-term protection of public life. We should re-understand the construction process and details of thermal power plants from the perspective of industry, society and residents, and build a new platform for the construction management and control of thermal power plants, so that they can have a deeper perspective, which is conducive to the standardization and quality of thermal power plant construction.
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