Intelligent dosing method for boiler
A smart boiler technology, applied in boiler cleaning devices, boiler cleaning control devices, neutralized water/sewage treatment, etc., can solve the problem of unqualified pH of feed water quality, increased system corrosion and scaling, affecting unit safety, economical operation, etc. problems, to achieve the effect of preventing scaling risks, improving reliability, and correcting parameters
Pending Publication Date: 2021-07-02
HUADIAN ELECTRIC POWER SCI INST CO LTD
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Problems solved by technology
There is a certain hysteresis in manual operation, causing the pH of the feed water to be unqualified, resulting in an increase in the probability of system corrosion and scaling, affecting the safe and economical operation of the unit
Method used
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Embodiment
[0022] See figure 1 , figure 2 In this embodiment, a boiler intelligent dosing method, the system includes an automatic pharmaceutical system, a measuring box, a metering pump, a dosing pipe flowmeter, a water supply flowmeter, a boiler feed water calculation type pH, computer intelligent analysis unit, and signal conversion Unit and the like.
[0023] According to the required demand, the feed water pH is set to 9.3-9.5 according to the GB 12145, and when the pH is lower than 9.3, the amount of dosage is increased, and the pH is higher than 9.5, the amount of dose is reduced. This requirement is achieved by the present invention. figure 1 The specific implementation process is as follows:
[0024] 1) The computer intelligent analysis unit setting will control the water pH within the range of 9.3-9.5, when the unit load changes, due to the amount of hysteresis in the PH change adjustment, the water flow is used as the first signal source. , When the ammonia concentration is a, the...
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The invention discloses an intelligent dosing method for a boiler. A system comprises an automatic dosing system, a metering box, a metering pump, a dosing pipeline flowmeter, a feed water flowmeter, a boiler feed water calculation type pH meter, a computer intelligent analysis unit, a signal conversion unit and the like. The computer intelligent analysis unit which is a central unit of the whole system collects and analyzes all data in the system, transmits signals to a PLC / DCS control system through the signal conversion unit, adjusts and calculates the frequency of the pump and controls the dosing amount, so that the purpose of intelligent dosing is achieved. The computer intelligent analysis unit comprises an intelligent monitoring unit and an intelligent data analysis unit, wherein the intelligent monitoring unit monitors the fluctuation condition of each parameter in the system, and the intelligent data analysis unit analyzes the relationship among the feed water flow, the pH value, the dosing amount and the dosing concentration. The method can make up for the lag of adjusting the dosing amount after the pH value is changed during manual dosing, and prevent the risk that scaling of the boiler occurs due to the water quality change.
Description
Technical field [0001] The invention relates to a boiler intelligent dosing method. Background technique [0002] According to the GB12145 "fire generator set and steam dynamic equipment water vapor quality", the pH value of waterless water is obtained from 9.2-9.6 for a unit of waterless. At present, most thermal power plants have volatage the unit, the boiler is basically ammonia water, the control system is basically manually dosing, when the pH changes exceed the specified range, the operator adjusts the frequency of the pump, change the medicine The amount is returned to the control range. There is a certain lag in manual operation, causing the water-water quality pH, leading to the increase in system corrosion and fouling, affecting the safety and economic operation of the unit. Inventive content [0003] It is an object of the present invention to overcome the above deficiencies in the prior art, and provide a boiler intelligent dosing method. [0004] The present inventi...
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Login to View More IPC IPC(8): F22B37/48F22B37/56C02F1/66
CPCF22B37/48F22B37/56C02F1/66
Inventor 喻江王诗琴衡世权唐国瑞徐展兰永龙于卫卫
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD