Ammonification anthropomorphic inspection type intelligent control system for condensed water in once-through boiler and control method

A technology of intelligent control system and once-through boiler, applied in general control system, control/regulation system, water treatment parameter control, etc., can solve water circulation system and boiler water vapor equipment corrosion, pH value deviates from the control range, and pH value fluctuates greatly To achieve the effect of ensuring precise and stable control, overcoming the hysteresis of pH value change, and precise dosage control

Active Publication Date: 2017-01-04
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

However, manual adjustment of the pH value is greatly affected by human factors and the operation is labor-intensive. Untimely debugging or improper operation will easily cause the pH value to deviate from the control range, and it is difficult to achieve accurate and stable control. The control method of PID adjustment is affected by P, The I parameter setting has a great influence, and the hysteresis of pH change needs to be fully considered. The s

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  • Ammonification anthropomorphic inspection type intelligent control system for condensed water in once-through boiler and control method
  • Ammonification anthropomorphic inspection type intelligent control system for condensed water in once-through boiler and control method
  • Ammonification anthropomorphic inspection type intelligent control system for condensed water in once-through boiler and control method

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0040] Such as figure 1 As shown, the anthropomorphic inspection type intelligent control system for condensed water and ammonia of the once-through boiler of the present invention includes:

[0041] The flow meter is set on the pipeline of the condensate pump outlet pipe, and is used to collect the real-time flow Q of the condensate pump;

[0042] The first conductivity meter is set at the centralized sampling rack, and the sampling point is set on the pipeline of the effluent pipe of the finishing system to collect the conductivity value κ of the effluent water of the finishing system before adding ammonia 1 ;

[0043] The second conductivity meter is connected to the ammonia solution tank and is used to collect the conductivity value κ in the ammonia solution tank 2 ;

[0044] The third conductivity meter is set at the centralized sampling rack, and the...

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Abstract

The invention discloses an ammonification anthropomorphic inspection type intelligent control system for condensed water in a once-through boiler and a control method. The intelligent control system comprises a flowmeter for acquiring real-time flow Q of a condensed water pump, a first conductivity meter, a second conductivity meter, a third conductivity meter, a DCS controller, and an alternating-current frequency converter which is connected with the DCS controller and a dosing metering pump respectively and is used for receiving a rotating speed frequency signal sent by the DCS controller and adjusting the frequency of the rotating speed of a motor of the dosing metering pump. The ammonification anthropomorphic inspection type intelligent control system for the condensed water in the once-through boiler avoids the hysteretic nature and the non-timeliness which are caused by manual adjustment, saves lots of labor cost and realizes stable and precise control over the pH value of the condensed water in the once-through boiler.

Description

Technical field [0001] The invention belongs to the field of condensate treatment, and specifically relates to the pH value control of the condensed water of a once-through boiler, and particularly relates to a anthropomorphic inspection type intelligent control system and a control method for the condensed water and ammonia of the once-through boiler. Background technique [0002] With the improvement of thermal power plant parameters and capacity, as well as the application of once-through boilers, higher and higher requirements are put forward for the quality of boiler feed water. Once-through boiler units are equipped with condensate treatment devices to remove metal corrosion products in the condensate And a small amount of dissolved salt, so that the quality of the condensed water meets the requirements of boiler feed water. Since the entire thermal system is mainly made of steel, although various systems have adopted a variety of anti-corrosion measures, slight corrosion i...

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Application Information

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IPC IPC(8): G05B19/042C02F1/66
CPCC02F1/66C02F2209/06G05B19/042
Inventor 张林涛
Owner XIAN THERMAL POWER RES INST CO LTD
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