Research And Design Of The Industry Boiler Computer Control System

â… , design the purpose: The industry boiler is a motive of industry production, it is extensive to used for the chemical engineering, spin and weave, deckle, electric power etc. profession. The current industry in our country boiler is roughly 250,000 set, the year consumes the coal invites to occupy the total yield in coal of 1/3.The management of these industry boilers, circulate with automate the level return lower, have very seriously wasted energy phenomenon. So, an important problem faced now, is the control system of the ameliorative industry boiler, from high-efficiency. â…¡,design the mission: One of the design principle of this system want to increase the best hot efficiency. Therefore we choose to control the tiny calculator. The single machine that the tiny calculator for adopting is serieses MCS-51s, expand a tiny machine control system, make it having the auto control function, and make each part of moderate the ground work. From but have to compare to move the regulate or the gauge regulates the larger superior. Along with the technical development of tiny calculator, the application is already extensive more and more, involve the each realm that production live gradually. In industry production line, industry boiler automation with economize energy applied tiny calculator technique in aspect,it is a work for having obviously economic performance with technique performance. Make use of the tiny calculator compose of industry boiler movement parameter the automatic examination of control the system, make use of the calculator software replace number numerous emulations type industry automation appearance, constitute the control system that have the special function. Make use of the advanced tiny calculator technique that selects by examinations the traditional industry reforms to fall behind, this is the main target of the design. â…¢, design the project: Boiler is a more sophisticate of regular object, for qualified steam that guaranteeing and providing the variety adapt to the burthen, the main parameter in production line must control strictly. Regulate primarily the deals are: Carrying the boiler water supply, reducing the temperature of water, againsting the wind etc. The main exportation is: Vaporing a water level, steam pressure, taking to press over the hot steam temperature of boiter, excessing air etc. These importation measures and output the deal make each other roughly . For example, the steam carries variety, will cause the vapor a water level, steam pressure by all means with over the variety of the hot steam temperature; Variety that fuel measures, not only affect the steam pressure, but also affect the vapor water level, measures over the hot steam temperature, air to take to press with the boiter etc..For like this complicated of object, the engineering handles the top to make the some simplifies, controlling demarcation as the boiler to some regular system. Regulate primarily the system have: Vaporing water level, burning to take press to regulate with the boiler . â…£,the dynamic characteristic analysis of the control process: The control process of that system have been divided into since three part of, then dynamic characteristic analysis from the vapor water level, burning the system boiler take to press three constitutes. Only there is clear and definite the dynamic characteristic of three systems in difference, the talent is better to take into the control to boilers, saving the resources, lifting high-efficiency. 1, The dynamic characteristic analysis of the vapor water level control adopts three amount of kinds of regulate, so, the variety of the boiler vapor water level is then under the influence of these third amount .The afflux of the water supply with the steam, namely pressure variety all make water level occurrence changed. (1) Inside anti-characteristic: Because the water temperature of the water supply is low, the aggrandizement of the amount of water applied, added the vapor bubble capacity of the soda piping, also lowered the vapor a pressure, therefore, although the amount of water applied enlarges, water level must through a late time Hereafter, then can take place the variety, this is the pure late in an integral calculus empress link. (2) Outside the characteristic of interference: Because of the variety of the steam dosage, cause the variety that vapor steep water level. At this time dynamic characteristic, with equilibrium angle in thing to analyze,is along with the increment of the steam discharge, the water level descends straightly, this is an integral calculus link. See with the hot and equilibrium angle, be the steam discharge increment the hour The boiler keeps the thermal energy dint descends,inside the vapor presses down to decline, the phenomenon of seethe turns worse, making water level gone up. Then incline to the stability gradually. This is the inertial link in the rank. 2, Burn the dynamic characteristic analysis of the system Burn the system, is the most important a link in boiler in industry. If the control is better,it can save a lot of fuels and increase hot efficiency in boiler. If the control is not better,it will not only waste resource but also cause the boiler explode, making produce the ceasing or result in the human body dead and injured trouble. (1) Inside anti-characteristic...