The Weihe Power Plant is located in the eastern suburbs of Xianyang City. Among them, the site of the first phase of the project is in the loess platform northwest of Xiaojiacun Station of Xitong Railway, adjacent to the Weihe River in the south and Biyingyuan in the north.
According to the third five-year plan for the overall planning of industrial and agricultural production development and power supply layout in Guanzhong, as early as 1958 and 1964, the Shaanxi Provincial Electric Power Bureau commissioned the Northwest Electric Power Design Institute to survey the factory site in the Weibei area. In August 1958, the Provincial Electric Power Bureau formed the Yunyang Power Plant Engineering Office to prepare for the construction of Yunyang Power Plant in Yunyang Town, Jingyang County. Later, due to the lack of water sources, the construction was stopped in April 1961. At the beginning of 1965, the Ministry of Water Resources and Electric Power listed the Weibei Power Plant as a key thermal power construction project in the Third Five-Year Plan. Northwest Electric Power Design Institute went to Weibei again to survey the site. According to the site selection report of the institute, in May 1966, the Ministry of Water Resources and Electric Power approved: the site is located in the loess platform northwest of Xiaojiacun Station of the Xitong Railway, and the scale is considered to be 300,000 kilowatts.
The Wei Power Plant site is surrounded by graded and graded terraces. The staircase landmark is 383 meters high, the staircase landmark is 423 meters high, and the junction of the two terraces is a steep ridge with an elevation difference of about 40 meters. Although the site is not far from the Wei River and the Jing River, it cannot be used as a water source due to the large sediment content of the Wei River and the small flow of the Jing River. The area is rich in groundwater, with four aquifers at a depth of 170 meters, which are divided into shallow aquifers, shallow confined aquifers and two deep confined aquifers. The recoverable amount of confined water in the three layers alone is 550,000 tons day and night. The "one" shape of the deep well group is distributed on the bank of the Wei River about 3 kilometers south of the factory. The power plant uses Tongchuan coal, which is 102 kilometers away from Tongchuan Coal Mine. The coal car was transported to Xiaojiacun Railway Station through the Xitong Railway, and then transported to the coal yard through the special line of the power plant.
The Weidian project was designed by the Northwest Electric Power Design Institute. Project code 610. Due to the implementation of the policy of "backing, dispersion, and concealment" at that time, the Ministry of Water Resources and Electric Power required that the underground power plant be designed, and the main plant should be fortified with a direct hit of 500 kg ordinary explosive shells. The Northwest Electric Power Design Institute initially proposed two sets of design proposals. At the same time, it is proposed that the total thickness of the blast-proof burst layer at the top of the main plant is 10 meters, of which the bottom layer is 1 meter thick reinforced concrete. After a lot of investigation, the preparatory office of the power plant learned that there were many problems that were difficult to solve in the noise, temperature, humidity, and construction of the underground power plant, so it sent people to the ministry to make a report. In view of the needs of the province's power load, the Shaanxi Provincial Military Region and the Shaanxi Provincial Construction Committee also suggested that the Ministry of Water and Power should change the Weihe Power Plant into a ground power plant to speed up construction. On August 15, 1967, the Ministry agreed to the above proposal and sent a telegram instructing: "The Weihe Power Plant will use the East German unit to build 100,000 kilowatts of power in the pit according to the surface power station, and generate electricity in 1969." In September of the same year, the Northwest Electric Power Design Institute proposed a preliminary design plan. In November 1969, the Northwest Electric Power Administration organized relevant units to conduct an on-site review of the initial plan and put forward specific opinions. Northwest Electric Power Design Institute is based on the construction drawing design.
The first phase of the project is designed to build 250,000 kW turbine generator units in East Germany. The civil works are undertaken by the Fourth Engineering Company of the Northwest Electric Power Construction Bureau;The installation works were undertaken by the Third Engineering Company.
Earthworks began on 20 August 1966. Due to the construction of an underground power plant at that time, the amount of earthwork was very large. In order to reduce the amount of earthwork, the main plant was arranged by using a gully on the edge of the hill. On January 31, 1967, a serious landslide occurred on the north side of the gully during construction, with a collapse volume of 6,000 m3, burying two bulldozers into the bottom of the earth, resulting in two deaths and the project was forced to stop. On March 19, construction resumed. Due to the large discrepancy between the design and the specific conditions of the site, the work was stopped again on June 10. At the beginning of November, the Northwest Electric Power Design Institute proposed a new design plan and construction plan. However, due to the fact that the design plan change involves a series of problems and cannot be completely solved, it cannot be constructed in a large area, resulting in the slow progress of the project that year. The following year, due to the serious interference of "**", the project almost came to a standstill. It was not until the end of June 1969 that the earthworks were largely completed. The whole project excavates and transports a total of 800,000 meters of earthwork3, and only the large mound of earth that is stacked on the first-class terrace to prevent the so-called "impact slope" has 450,000 meters of earthwork3, covering an area of more than 50 acres. The excavated foundation becomes a dustpan-shaped pit embedded in the edge of the hill. In September 1970, the foundation of the main plant was completed.
The two units installed in the first phase of the project were dismantled and transferred from the eight units of the same model that were basically ready for installation at the Qinghe Power Plant in Liaoning Province. The dismantling was completed in November 1966. Since there was nowhere to place it at the construction site, it was first transported to Baoji for temporary storage. Later, due to the change of the design plan and the delay of civil engineering, the equipment was stacked in Baoji for three years. During this period, the third power construction company maintained the equipment and overhauled some of the equipment.
The layout of the plant makes use of the high hill slope, and the cultivated land is occupied as little or as little as possible. The pipeline corridor between the compression steam engine room and the power distribution device, the main plant adopts the deoxidized coal bunker combined frame, the steam turbines are arranged in a horizontal row, and the maintenance site is located at the expansion end. The boiler is arranged in the open air, and the bottom floor of the boiler room is fully enclosed. The furnace adopts centralized control, and the main control room is set up separately for electric.
At the end of March 1970, Unit 1 began to be installed, and it was connected to the grid for power generation on December 26Unit 2 began installation in January 1971 and went into production in September.
In the construction of the first phase of the Weihe Power Plant, many designs were changed or cut during the installation process due to the fact that the construction procedures were not followed, the one-sided pursuit of speed, and the practice of "simple power generation". For example, the boiler make-up water system cancels the evaporator;Only one set of coal conveying belts was installed, and the roof of the coal conveying trestle was removedOnly one water supply pipe and ash removal pipe were installed;The standby plant high variable was cancelled. The original design of the booster station was arranged in the house style, and then the prefabricated house structure was blown up and changed to "house equipment house exterior decoration". In addition, there are no procedures for the acceptance and handover of the project, and there are many remaining problems. The main problems are: large temperature difference between the cylinder of the steam turbine, large vibration of the unit, the high-pressure heater can not be put into operation, the output of the machine tower is not enough, and the coal conveying belt is seriously slipped in rainy days, which directly affects the coal. After the unit was put into operation, accidents continued, and the output could not go up for a long time.
In the three years from 1972 to 1974, the workers of the Weihe Power Plant fought a great battle to turn over the equipment, eliminated the remaining problems in the infrastructure, successively added a roof to the coal trestle, added ash removal pipelines and water supply pipelines, carried out technical transformation of the standby plant, eliminated thousands of equipment defects, and basically achieved stable operation of the two units. Later, it carried out technological innovation and technological transformation, and added a 2000 m2 natural cooling tower to improve the vacuum level of the steam turbine. In November 1982, the two units were fully launched.
The first phase of the project has a total of 110 thousand volt outlets 5 times, namely: Wei (He) West (An) 1 and 2 circuits, Wei (He) 3 (original), Wei (He) engine (field) line and Wei (He) Du (Qindu) line. In addition, there are two outgoing 110 kV cables connected to two start-up standby transformers in Plant 2. The annual power generation capacity is about 600 million kilowatt-hours.
Weihe Power Plant. The second and third phases of the expansion project are key projects raised by Shaanxi Province to alleviate the power shortage in the province.
The new site of the expansion project is located about 1 km southeast of the old factory and 12 km northwest of the new Xi'an (Xianyang) Airport. The site is 1 distance from the Weihe River in the southIt is 5 kilometers away from Xianyang city in the west and 4 kilometers away from the Xitong first-class highway in the east.
The terrain of the factory is open and flat. However, in order to reduce the floor area, the layout of the factory area and the front area of the plant is relatively compact. The main plant is arranged in a unit system, with one machine and one control, and the area between each unit is clear. The steam engine room and the deoxidation coal bunker are in-house, the deaerator is open-air, and the open-air arrangement above the operating floor of the boiler room. The planned capacity of the project is 4.3 million kilowatts, with room for further expansion. The scale of the second phase of the project is 2.3 million kilowatts. They are listed as the plant number unit. The three main engines are manufactured by Shanghai Boiler Factory, Shanghai Steam Turbine Factory, and Shanghai Electric Machinery Factory. It is the first project under construction in Shaanxi Province with 300,000 kilowatt large-scale units.
The main design of the second phase of the project is undertaken by the Northwest Electric Power Design Institute. The railway design is undertaken by Zhengzhou Railway Survey and Design Institute. The design of the protective embankment was undertaken by the Shaanxi Provincial Water Conservancy and Electric Power Civil Engineering and Construction Survey and Design Institute. The construction of the project was contracted by Shaanxi Provincial Electric Power Construction Corporation. The civil construction of the main project is undertaken by the Northwest Electric Power Construction Company No. 4, and the installation construction is undertaken by the No. 3 Electric Power Construction Company.
Since the expansion project of the Weihe Power Plant was a rush project in Shaanxi Province to alleviate the serious power shortage, in September 1987, the project design task book was officially approved by the State Development Planning Commission and was supplemented as a national large and medium-sized preparatory project of that year. In October, the "Weihe Power Plant Construction Company" was established. In November, the Ministry of Water Resources and Electric Power approved the preliminary design.
The amount of concrete in this phase is 200,000 m3, and the amount of earth and stone is 24740,000 m3. The load-bearing structure of the main plant adopts a prefabricated concrete structure, and the deoxygenated coal bunker is a double frame. The boiler structure is of the " type, the elevation of the center of the steam drum is 63 meters, the total span in the width direction is 32 meters, and the total span in the depth direction is 394 meters. The steam engine room spans 27 meters and is 31 meters high. The water supply mode adopts a secondary circulation system, and each unit is equipped with a 5000 m2 hyperbolic natural ventilation cooling tower, which is arranged in a zigzag shape between the steam engine room and the power distribution device. The chimney is a new sleeve type, with a height of 240 meters and an inner diameter of 7 meters at the outlet, which makes the construction volume and construction difficult to do. The main plant project was officially started on September 6, 1988. The Northwest Electric Power Design Institute was in a hurry and sent nearly 100 people to the construction site to carry out on-site design. Xidian No. 3 Company obeyed the arrangement, abandoned the Shandong Dongying Power Plant Project, which had initialed the construction contract, and invested in the construction of Weidian. In only 100 days, Xidian No. 4 Company completed 120,000 m3 of foundation earthwork excavation and more than 1,000 m3 of fly ash concrete treatment for the foundation, and began to pour the first set of column foundations.
By the end of 1990, the No. 3 steam turbine had been covered, the plant was closed, and the plant was electrified. The civil works below zero meters of the No. 0 coal conveying road and dumper room of the coal conveying system were completed. The water system is ready for water production. The chimney, chilled water tower, and starting steam lines have been completed. The underground facilities of the whole plant have the requirements of water production, live electricity and water pressure. The pipe trench is basically completed. The drainage system is ready for use. The 330 kV booster station has been basically installed. The original plan was to reach "boiler smoke and steam engine turning" at the end of 1990, but the plan was adjusted because the main engine did not arrive as scheduled.
After the two units of the second phase of the Weidian project are put into operation, it can generate about 3.6 billion kilowatt-hours of electricity per year, which is equivalent to six times the power generation capacity of the two units of the first phase of the project, which will greatly alleviate the serious power shortage in the province and play an important role in the economic development of the province.
By the end of 1990, the state had invested 7700 million yuan. Among them, the second phase of the project has an investment of 700 million yuan, and 4700 million yuan. The factory covers an area of 248670,000 m2, of which 118 are built for power generation20,000 m2. At the end of 1990, there were 2,218 employees in the factory, including 1,218 in the preparatory office. There are 116 people with intermediate and above titles in the whole factory. In the 26 years since the establishment of the plant, the cumulative power generation has been 1193.8 billion kWh.