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Achieve cooling tower fan and boiler blower control scheme 孟亚男 book Yu Di height 2 1. Jilin Institute of Chemical Industry Department, Jilin 132022; 2. Jilin Chemical Industrial Co., Ltd. fertilizer plant, Jilin Jilin 132021 acrylonitrile plant circulating water cooling tower fan and boiler blower in controlling the application of the inverter and soft starter, successful in achieving lower energy consumption, improve the operation rate of the equipment, reduce maintenance costs and other purposes.
Acrylonitrile plant circulating water cooling tower, the station 160kW cooling fan for circulating water. To ensure the circulating cooling water, and several aspects of the safety and reliability from the viewpoint of economy and technology advanced, the wind machine adopts frequency control, two fans with soft starters. In ensuring the cooling effect of the premise, give full play to the role of the inverter.
When air flow requirements are lower, variable frequency mode reduces motor speed, the motor power consumption declined significantly, achieve significant energy savings.
Control circuit, operational control and protection interlock action. By 1 and inverter fan will switch to the two methods, namely frequency start mode and direct start mode, the fan can be achieved without the implementation of frequency conversion can also be directly emergency frequency start, make sure that in any case Fans can secure work to ensure the cooling effect of the cooling tower.
Power plant boiler blower control scheme is similar to the previous.
Each boiler air supply by two fans, variable frequency control schemes, conducted by the inverter fan air volume control, energy savings, improve air quality and ensure the boiler combustion.
Two boilers were constituted by the inverter fan control system and sets the soft starter. Frequency start the fan control can also be direct start function, without performing frequency conversion, and will switch on the direct start, direct start control.
1 Jia control scheme one. Frequency boot sequence start elbow 1 Soft start again if enough pressure elbow 2 or 3 cm overpressure add 1 if automatic deceleration down to meet the requirements of circulating water cooling tower fan control scheme is intended to constant value if still not reach the constant value again Soft Start river 2 or 3, that is, two motor frequency, frequency conversion PCT if overpressure elbow 1 down deceleration.
Boiler blower i80kW startup sequence frequency control scheme 2. If the pressure is not enough to start the elbow a soft start again if overpressure elbow 2 Ml automatically reduced frequency deceleration achieve the required constant value 4. Frequency start again if the pressure is not enough if the overpressure automatic soft start down to meet the requirements deceleration constant value. Cooling tower fan and boiler blower control uses three inverters, the choice of the company's 1336 series 8 people; three soft start, use the company's 8 0 5 per cent cut 8 series. If the total power of 1035 Jia, a minimum rate of 30 energy-saving, electricity by 49 yuan Jia. 1 computing, to run for the 8000 annual electricity savings of $ 30,000, has considerable economic video booth design Gu Zhu Xiang Xiang 靳哲康 21. Tianjin Normal University, Tianjin entire circuit 2. Tianjin Industrial School in Tianjin video booth by the motherboard power supply circuit camera remote control receiver circuit status indicator circuit touch switch control circuit audio amplifier circuit part of the circuit top end light sources and other components. The circuit board is the core of the video booth, using SCM 89,1 spawned as a motherboard, postal gown Meng Shuo 9051 internal program memory and the 89,051 people inside the oscillation circuit, the motherboard can receive remote control touch switch control circuit microcomputer control inputs respectively signal, complete camera control multiple audio and video input and output selection control bottom and top light illumination control of the state refers to the control circuit.
Touch switch circuit is connected to form a short circuit Zhenshi keyboard. 89051 9,1 spawned clever; 8 output ports by the end of the light source and the top source control signals, UP and DOWU signals to control the inverter to start the top and bottom light source, the light source using photovoltaic inverters coupled devices and the motherboard isolation. Recognize. Dual 4 to 1 analog switch, input selection signal by Ding 89051 rotten port output. For gating control. Wherein, the channel for the audio signal input and output for the video signal input and output channels. Strobe output audio signal directly after the video signal by the power amplifier output. Camera output, lotus root, the 3-terminal output. At the same time, people 189,1 and an output signal, control of the state refers to the circuit, used to refer to the camera is operating and the input and output signal selection.
Integrated chip 13, the team and to form decoder circuit, remote control instructions are sent to people 789,1 decoding circuit, and an external interrupt input 0 1 lamp by the software and the small port serial output port 89051 MARTIN , 0,1 port and port on the machine control, process control function and the touch switch control identical.
Digital Visualizer can also be, 0 control. 0 machine can pass and the camera work state control. Select the input signal light control still needs to be done by the touch switch or remote control.
An operational amplifier and other devices composed of audio amplifier circuit, the output signal as an audio signal is supplied to the unit motherboard.