In the first phase of the chemical year, the air separation air compressor of our company was changed from the steam engine to the motor to drive the economic analysis and the motor starting process to calculate the buy-in heatman. (Newly acquired chemical fertilizer limited liability company, Urumqi 83 meter old I The company is a medium-sized nitrogen fertilizer enterprise built in the year. The company's annual production capacity of synthetic ammonia 10,000 tons of nitric acid has been technically reformed many times. Especially after the completion of the 100,000 ammonia synthesis and expansion project in one year, the product quantity has been increased. The annual production of synthetic ammonia 10,000 urea nitric acid Qianwan began to stabilize in the second half of the year, and at the same time the production capacity reached the design capacity. At the same time, because the boiler of our company has been running for many years, the output has gradually decreased, and there is insufficient steam production of chemical fertilizer. phenomenon.
In order to solve this problem, the power of the airpower of La X is 45 0, and the centrifugal air compressor is driven by the turbine. (The equipment of Japan Hitachi Co., Ltd. was changed from the original turbine to the asynchronous motor, and the original drive mode was saved. The mouth h not only reduces the burden on the boiler, but also solves the problem of insufficient steam for chemical fertilizer production, and has obtained relatively good economic benefits.
The difference between the two methods of 20,000 yuan or more is 10,000 yuan per year. It can be seen that after the air compressor is changed to the asynchronous motor, the company can save 340,000 yuan per year.
The economic analysis of the air compressor before and after the change of the current mode of operation The current operating power of the motor is the steam price of our company. The amount of steam consumed by the turbine is the amount of steam used for the production of fertilizer. The original steam engine drives the hourly cost to run in the first year. The cost of the yuan of 200 million yuan to change the motor to drive the hourly cost for the first year of running costs, the calculation of the motor starting process and the determination of the starting method. The basic information of the motor nameplate rated parameter model, Feiwanyi blade, rated power (eP) month rating The voltage stage is rated at the rated current of the knife k (and the rated power factor (work rated efficiency (knife rated frequency flywheel torque tons).
Lining starting current multiple starting torque multiple pseudo maximum torque multiple insulation level phase number manufacturer Shanghai Motor Factory air compressor nameplate rated parameter model training one to 1 rated power (礴 and blade rated speed (Zhouzhou input speed (both Printed instead.
In the first phase of the year, the rated exhaust volume of the billion workers was printed (). 5 air compressor flywheel torque is dry.
廿 Speed ​​increaser flywheel torque is pure.
Gan production company Japan Hitachi.
The calculation of the bus voltage at the start of the motor has a main transformer change in the total substation of the company. The main transformer has 20 main conductors and the busbar is divided into I sections. The W motor is connected to the section as shown in the figure. Reduce the fluctuation of the bus voltage, before the start of the motor, the main transformer is in the parallel state. Before the motor starts, the bus voltage and the busbar short-circuit capacity are two states. The pre-reactive power is two. The motor is rated to the capacity of the second line. When the motor is started, the bus voltage is destroyed. The calculation of the starting time of the motor is short because the distance from the bus to the motor is short. The voltage drop of the cable is not considered. The terminal voltage of the motor is equal to the bus voltage, that is, the second air pressure is called The relative value of the static resistance torque of the machine relative to the average starting torque of the motor (high speed squirrel cage asynchronous motor) motor starting torque multiple fire two units total flywheel torque ç‘) the second fly air compressor actual flywheel torque converted to the motor speed of the flywheel torque For the Guangdong two devices, set three.
In tons.
Expanded center air compressor actual flywheel torque, cover.
Expanding the rated speed of an air compressor, and the rated speed of a motor 汕 the actual flywheel torque of the speed increaser is converted to the motor speed. The calculation of the flywheel torque is two porcelain, or the calculation result of the above two red ones meets the large infrequent starting motor. When the bus voltage is not lower than 85, it is required to be 30.
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In the expansion type, the actual flywheel torque of the speed increaser is increased by one input speed of the speed increaser, and the rated speed of the motor is the total flywheel torque of the oil unit.
Expanded.
The total flywheel torque of a unit in the expansion and expansion of the second and the second type, Ganyi motor flywheel torque, tons.
The actual flywheel torque of the lining air compressor is converted to the flywheel torque of the motor machine speed. The actual flywheel torque converted to the motor speed is converted to the flywheel torque of the motor speed, ton.
The motor start time is as follows.
It is set to start directly.
The unit did not find any abnormal phenomena during the operation of more than one year, and the operation was in good condition and achieved the expected results.
I played a few times and kicked it.
According to the calculation result and the actual situation, the starting stroke of the motor is corrected.
Chemical Factory Manual, Chemical Industry Press, China Aviation Industry Planning and Design Institute.
Industrial and civil distribution, steam springs, valleys, vines, rabbits, stagnation, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow, sorrow On the first page of the household business unit, the calculation of the é»” 计算 å« , , , , , , ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® ç“® 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇 蛇Second (fish, fish, ping, some, two, and two expansion calculation of the total heat transfer coefficient of the snake tube Fan Shiyifan from a bite of the second intestine (lining to the number of coils of the snake tube is one. 0 a steel pipe thick lining PTFE thick E2 fly Second, from the second expansion of the two expansion two, Erli two groups, the country through the above calculations, it can be known that the increase of the coil heat transfer in the original hydrolysis kettle can shorten the production of the original hydrolysis kettle to the second generation of iron and two Liyi Uå¼å£J recognizes the five-faced ten-yuan yuan flying in case of the second-hand expansion of the heat transfer area. The heat exchange area of ​​the hot jacket exchanged by the pinch tube is the heat of the coil exchange. Through the calculation of hot food and calculation of heat exchange area, the boiler heating in the original factory meets the requirements, and the heat transfer area of ​​the hydrogel jacket is not enough.
Door chemical process design manual.
Principles of chemical engineering.
The chain grate is the combustion equipment of coal-fired steam boiler. There are three main types and structures: chain belt grate, scale grate and beam grate.
1. Chain belt grate. The chain belt grate is a wide circular chain belt which is surrounded by and supported on the the front and rear axles via the chain wheels. At present, ZOZEN packaged chain grate steam boiler mainly adopts the large-block chain belt grate with a capacity of 1-20 tph.
2. Scale grate. The scale grate has many advantages. The obvious one is that there is less coal leakage. The scales can be replaced without shutting down the boiler. The ventilation is balanced, and the ventilation section is relatively small (6%). The chain grate bars only bears the stress or high temperature instead of both of them, which improves the working conditions of the chain grate.
3. Beam grate. Its main feature is that the width and length of the grate can be extended in a wide range, and the tonnage of the boiler can be larger. At present, the tonnage of the domestic beam chain grate steam boiler can reach 240 tph. The grate is featured with long service life, good durability, smooth arrangement and convenient replacement.
Chain Grate Boiler,Travelling Grate Boiler,Travelling Grate,Step Grate Boiler
Jinan Yuanda Power Equipment Co.,Ltd. , https://www.jnyuandaboilers.com