JPH0646085B2 - Boiler full blower monitoring device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an apparatus for monitoring the proper total blow timing of a boiler.

[Technical background of the invention and its problems] In order to prevent corrosion in the boiler can, chemical treatment is thrown at the time of water supply to treat the boiler water in the can. However, this in-can treatment alone is not sufficient to prevent corrosion. Therefore, if the boiler water is concentrated to a certain degree and the pH, that is, the electric conductivity of the can water is kept high, corrosion in the can is prevented. However, if the canned water is excessively concentrated and the electric conductivity becomes too high, it causes forming carryover and deteriorates the quality of steam. Therefore, it is very important for boiler maintenance to blow can water at an appropriate time. However, in the past,
The quality of raw water is set in advance, the blow timing is set based on the water quality, and the combustion time is measured to determine the total blow timing. By the way, in practice, it is difficult to capture an accurate combustion time because ON-OFF combustion is performed and the combustion amount also changes depending on the load condition, and in consideration of seasonal changes in raw water, all blows are appropriate. It is difficult to determine if it is taking place at a certain time.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object of the present invention is to accurately grasp the appropriateness of the time when all the blows are made in view of the concentration of the can water, and to perform all the blows thereafter. It is an object of the present invention to provide an all-blow monitoring device for a boiler, which can easily obtain materials that can be used for timing determination.

[Summary of the Invention] In order to achieve the above object, in the present invention, a can water conductivity detector provided in a boiler and a can water conductivity D are compared with a total blow start conductivity set value A,
An all-blow-conductivity comparing section that outputs the comparison value S ₁ and a blow caution signal if there is a all-blow signal when the all-blow conductivity comparison value S ₁ is D <A, and the above-mentioned conductivity comparison value is output. If S ₁ is D> A, the total blow alarm time T is started to be integrated, and if there is a full blow signal before the total time T reaches the total blow alarm set time T ₀ , an appropriate blow signal is output. If there is a blow warning signal after the total time T has passed the blow warning set time T ₀ , a blow warning signal that outputs a blow warning signal and the number of output signals from the blow judgment unit are a blow caution signal and a proper blow signal. And a blow monitoring controller including a storage unit that stores the number of blows for each blow alarm signal and a blow display unit that displays the number of blows.

Embodiments of the Invention Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of the present invention. Reference numeral (1) in the drawing is a boiler, and (2) is a can water conductivity detector that is installed in the boiler water part and detects the conductivity of the can water and sends it to the all-blow conductivity comparison part described later. is there. (4) is all blow signal input section, (11)
Is a blower. When all blows are performed by the blower, the all blow signal input unit (4) receives the all blow signals from the manual confirmation means or the automatic confirmation means using a water surface detector, and outputs the signals. It is transmitted to the determination unit (5) described later. (8) is a first blow monitoring controller including an all-blow-conductivity comparison unit (3), a blow determination unit (5), a blow-count storage unit (6), and a blow display unit (7). The total blow conductivity comparison part (3) is the total blow start conductivity set value (the minimum conductivity that can be blown to maintain the proper conductivity of the can water) A determined by the water quality and the structure peculiar to the boiler. The detection signal D from the can water electric conductivity detector (2) is preset and compared with a set value A, and the comparison value S ₁ is used as a blow discrimination unit to be described later.
Send to (5). If the blow determination unit (5) has a blow signal from the blow signal input unit (4) when the comparison value S ₁ from the blow conductivity comparison unit (3) is D <A, the blow timing is too early. A blow caution signal is output and the electric conductivity of the can water is D
When> A, the total blow alarm time T is started to be integrated, and the total time T is determined by the water quality and the structure peculiar to the boiler. The time required to reach the maximum conductivity from the lowest possible conductivity for all blows) All blow signal input parts before reaching T ₀
If there is a full blow signal from (4), an appropriate blow signal is output, and if there is a full blow signal from the full blow signal input section after the integrated time T has passed the full blow alarm set time T ₀ , the blow timing is too late. Is configured to output a blow alarm signal. The blow frequency storage unit (6) classifies and integrates the output signals from the blow determination unit for each blow caution signal, proper blow signal and blow warning signal. The blow display unit (7) displays the data accumulated in the blow number storage unit (6) at any time by an instruction signal from the outside. The blow display unit can directly display the output signal from the blow determination unit.

FIG. 2 is an explanatory diagram of a blow monitoring controller in another embodiment. (10) comprises an all-blow-conductivity comparison section (3), a blow-determination section (5) ', a blow-count storage section (6)', an all-blow-inhibited conductivity comparison section (9), and a blow display section (7). It is a second blow monitoring controller. All blow signal input section shown in FIG.
(4), the total blow conductivity comparison part (3) and the blow display part (7) are the same as those in FIG. The all-blow-inhibited conductivity comparison part (9) is set to the all-blow-inhibited conductivity set value (other than the all-blow start electrical conductivity set value A, which is determined by the water quality and the structure peculiar to the boiler. The maximum value (B) of the electric conductivity of the canned water, which is forbidden from all blows, is set in advance and the detection signal D from the detector of the electric conductivity of the canned water is set as the set value B. The comparison is performed and the comparison value S ₂ is transmitted to the blow discrimination unit (5) ′ described later. Blow discriminating unit (5) 'outputs blow inhibition signal if the full blown signal from Blow signal input portion when the comparison value S ₂ is D <B from all blow prohibited conductivity comparing unit (9), When the comparison value S ₁ from the total blow conductivity comparison section is D <A, if there is a full blow signal from the full blow signal input section (4), a blow caution signal that the blow time is too early is output, and the can When the electric conductivity of water is D> A, the total blow alarm signal T is started to be integrated, and the total time T is determined by the water quality and the structure peculiar to the boiler. If all blow signals are input from the all blow signal input section (4) before reaching T ₀ , the appropriate blow signal is output. The integrated time T is the total blow alarm set time T
If there is a full blow signal from the full blow signal input section after the passage of ₀ , a blow warning signal indicating that the blow timing is too late is output. The blow frequency storage unit (6) 'classifies and integrates the output signals from the blow determination unit for each blow prohibition signal, blow caution signal, proper blow signal and blow warning signal. The blow display section (7) is a blow count storage section
The data accumulated in (6) 'is displayed by an instruction signal from the outside at any time.

Next, the operation will be described by taking the case of using the second blow monitoring controller of FIG. 2 as an example. First, prior to the operation of the boiler, based on the water quality analysis results, the total blow start conductivity set value A is set to the full blow conductivity comparison section, the full blow prohibited conductivity set value B is set to the full blow prohibited conductivity comparison section, and all blows are set. Alarm set time T
₀ is set in each blow discrimination unit. When the operation of the boiler is started, the total blow conductivity comparison section and the all-blow prohibition conductivity comparison section compare the can water conductivity D from the can water conductivity detector with the respective installation values A and B, and calculate The comparison value is transmitted to the blow discrimination unit. The blow determination unit starts the integration of the total blow alarm time T if the ratio of the can water conductivity D from the total blow conductivity comparison unit and the set value A is D> A, and if there is a total blow signal, the integrated time T To reset. The full blow signal is input by the full blow signal input section by a manual means for confirming the operation or automatic confirming means using a water surface detector when the blow device performs the full blow. The blow discriminating unit that receives the full blow signal from the full blow signal input unit has an electric conductivity of D when receiving the full blow signal.
If the state of <B, the blow prohibition signal is output, if the electric conductivity of the can water is B <D <A, the blow caution signal is output, and the electric conductivity of the can water is D> A. Time is T <T ₀
In the state of, a proper blow signal is output, and if the electric conductivity of the can water is D> A and the integration time is T> T ₀ ,
Output blow alarm signal. The blow count storage unit receiving the output signal from the blow determination unit classifies the output signals into blow prohibition signals, blow caution signals, proper blow signals, and alarm blow signals, and stores the blow counts in an integrated manner.
The boiler operation manager inputs an instruction signal to the blow display section as needed, and displays or prints out the data accumulated in the blow number storage section on the blow display section. In the above, the case where the accumulated data is displayed or printed out on the display unit has been described.
Not limited to this, it is also possible to display the discrimination result in the discrimination unit on the display unit every time all blow input signals are received.

[Effects of the Invention] The present invention is configured as described above, and since it is possible to know the number of blows for each state of canned water at the time of all blows, it is possible to easily determine the adequacy at the time of all blows. Therefore, it is possible to provide an all-blow monitoring device for a boiler from which materials that can be used for boiler management, such as determination of all blow times thereafter can be easily obtained.

[Brief description of drawings]

FIG. 1 is an illustration of an embodiment of the present invention, and FIG. 2 is an illustration of another embodiment of the blow monitoring controller. (1) …… Boiler (2) …… Can water conductivity detector (3) …… All blow conductivity comparison section (4) …… All blow signal input section (5), (5) ′ …… Blow discrimination Part (6), (6) ′ …… Blow count storage unit (7) …… Blow display unit (8) …… First blow monitoring controller (9) …… All blow prohibited conductivity comparison unit (10)… … Second blow monitoring controller (11) …… Blow device

Claims (1)

[Claims] 1. A can water conductivity detector (2) provided on a boiler (1).
And the total water conductivity D comparing the can water electric conductivity D with the total blow start electric conductivity set value A, and outputting the comparison value S _1.
(3) If the total blow conductivity comparison value S ₁ is D <A, a blow caution signal is output if there is a full blow signal, and if the conductivity comparison value S ₁ is D> A, a full blow alarm is issued. The integration of the time T is started, and the integration time T is the total blow alarm set time T
If there is a full blow signal before reaching ₀ , a proper blow signal is output, and if there is a full blow signal after the integrated time T has passed the full blow alarm set time T ₀ , a blow determination signal is output. (5) includes a blow number storage unit (6) and a blow display unit (7) for storing the number of output signals from the blow determination unit (5) for each blow caution signal, proper blow signal and blow alarm signal An all blow monitoring device for a boiler, which comprises a blow monitoring controller.