Boiler control device and control method
A boiler control and boiler water technology, applied in boiler cleaning control devices, boiler working status indication, heating mode, etc., can solve problems such as boiler drum temperature drop, energy loss, and drum conductivity deviation
Active Publication Date: 2018-07-03
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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Problems solved by technology
For example, since the flow rate of the blown water exceeds the level to maintain the proper conductivity of the drum, the temperature in the boiler drum drops, which becomes the main cause of energy loss
[0005] In addition, when the blowing water flow rate is less than the supply water flow rate equivalent to the steam flow rate, the conductivity of the drum will deviate to the high side of the set range, which will become the main cause of scale adhesion
Method used
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[0017] Hereinafter, each embodiment will be described with reference to the drawings.
[0018] In addition, the drawings are only schematic or conceptual representations, and the relationship between the thickness and width of each part, the size ratio between parts, and the like are not necessarily the same as those in reality. Furthermore, even if the same parts are shown, they may be shown with different dimensions and ratios between drawings.
[0019] In addition, in this-application specification and each drawing, the same reference numeral is attached|subjected to the same element as what was already demonstrated in a figure, and detailed description is abbreviate|omitted suitably.
[0020] figure 1 It is a block diagram schematically showing the boiler system concerning embodiment.
[0021] Such as figure 1 As shown, the boiler system 2 includes: a boiler drum 4 , a water supply tank 5 , a water supply pump 6 , a blown water tank 8 , and a boiler control device 10 . ...
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The present invention provides a boiler control device and a control method that can more appropriately control the conductivity of boiler water in a boiler drum. According to an embodiment, there is provided a boiler control device including a water level meter, a water supply valve, a blow-off valve, first to third flow meters, a conductivity meter, and first and second control units. The water level gauge measures the water level in the steam drum. The water supply valve regulates the flow of water supply. The blow-out valve adjusts the blow-out flow rate. The first flow meter measures the flow rate of the water supply. The second flow meter measures the flow rate of steam. The third flow meter measures the blown flow rate. The conductivity meter measures the conductivity of the water in the steam drum. The first control unit controls the water supply valve to keep the water level constant. The second control unit calculates the conductivity after a predetermined period of time based on the measurement results of the conductivity meter, the second flow meter, and the third flow meter, and controls the blow valve based on the calculation results to keep the conductivity within the set range.
Description
technical field [0001] Embodiments of the present invention relate to a boiler control device and a control method for controlling the electrical conductivity of boiler water in a boiler drum within a set range. Background technique [0002] There is a boiler control device that adjusts the flow rate of boiler water for water supply based on the flow rate of boiler water blown out and the flow rate of steam released to substantially control the amount of boiler water in the boiler drum to be constant. Hereinafter, the flow rate of boiler water to be blown is referred to as "blown water flow rate", and the flow rate of boiler water for water supply is referred to as "water supply flow rate". [0003] The boiler control device keeps the blown water flow rate substantially constant when the electrical conductivity of boiler water in the boiler drum (hereinafter referred to as "drum electrical conductivity") is within a set range. Moreover, when the conductivity of the steam dr...
Claims
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IPC IPC(8): F22B37/56F22B37/38
CPCF24D3/1083F24D19/0092F24D19/1009F24H9/2007F24D2220/048F24D2220/044F24H9/45
Inventor 石渡进
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP