Treatment method for phosphate hiding phenomenon of steam pocket boiler

A technology of hidden phenomena and treatment methods, which is applied in the field of treatment of phosphate hidden phenomena in drum furnaces, to achieve the effect of avoiding multiple pressures and eliminating phosphate hidden phenomena

Pending Publication Date: 2021-09-21
湖南华菱湘钢节能发电有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Restricted by the continuity of the production process of iron and steel enterprises, the shutdown of the furnace without a spare furnace will undoubtedly cause pressure on production, the environment, etc.

Method used

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  • Treatment method for phosphate hiding phenomenon of steam pocket boiler

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Comparison scheme
Effect test

Embodiment 1

[0015] A method for processing the hidden phenomenon of phosphate in a drum furnace, comprising the following steps:

[0016] (1) According to the water quality of condensed water, there is no leakage in the condenser. Use condensate hardness (= 0) and sodium content (less than 5μg / L) to judge that there is no leakage in the condenser. The system equipment mainly refers to the condenser, which is made of stainless steel and has no fine treatment device.

[0017] (2) Use the opportunity of reducing the load of boilers with insufficient gas to conduct experiments. According to the steam-water chemical guidelines of thermal power plants (DL / T805.2-2016): the load is reduced from 140, 120, 100, and 80 MW / h in sequence, and each load is stable Last for about 2 hours, test the pH, phosphate, hardness and conductivity of the furnace water every 30 minutes, and record the data as shown in Table 1. It can be seen from Table 1 that when the load drops from 140 to 100, the phosphate co...

Embodiment 2

[0024] A method for processing the hidden phenomenon of phosphate in a drum furnace, comprising the following steps:

[0025] (1) According to the water quality of condensed water, there is no leakage in the condenser. Use condensate hardness (= 0) and sodium content (less than 5μg / L) to judge that there is no leakage in the condenser. The system equipment mainly refers to the condenser, which is made of stainless steel and has no fine treatment device.

[0026] (2) Use the opportunity of reducing the load of boilers with insufficient gas to conduct experiments. According to the steam-water chemical guidelines of thermal power plants (DL / T805.2-2016): the load is reduced from 140, 120, 100, 80, and 50 MW / h in sequence, and each The load is stable for about 1 hour, and the pH, phosphate, hardness and conductivity of the furnace water are tested every 30 minutes, and the data are recorded in Table 2. It can be seen from Table 2 that when the load drops from 140 to 50, the chan...

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Abstract

The invention discloses a treatment method for the phosphate hiding phenomenon of a steam pocket boiler. The chance of load reduction is utilized to increase the number of times of fixed displacement and the continuous displacement opening degree, meanwhile, sodium hydroxide is added to ensure that PH of boiler water meets the standard, through the above manner, the phosphate hiding phenomenon is gradually eliminated, and the abnormal condition of the water quality of the boiler water is gradually relieved. On one hand, stable operation of a unit can be recovered without furnace shutdown and chemical cleaning; and on the other hand, multiple pressures caused by furnace shutdown to production and environment are avoided.

Description

technical field [0001] The invention relates to the technical field of water treatment in thermal power plants, and relates to a method for treating the hidden phenomenon of phosphate in a drum furnace. Background technique [0002] In order to prevent the generation of calcium and magnesium scale in the boiler and reduce the corrosion of water-cooled wall tubes, reduce the blowdown rate of the boiler under the premise of ensuring the safe operation of the boiler, and maintain the steam-water circulation in the boiler, the boiler water is usually treated with phosphate. During the operation of the drum boiler, there will be an abnormal phenomenon of boiler water quality, which is the hidden phenomenon of phosphate. When the phenomenon of phosphate hiding occurs, if it is allowed to deteriorate, it may cause fouling and corrosion of the heating surface and the steam turbine system. In severe cases, it will cause the boiler heating surface to burst, and even the boiler will st...

Claims

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Application Information

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IPC IPC(8): F22B37/54C02F1/66
CPCF22B37/54C02F1/66
Inventor 谭秋良陈仕阳志强靳亚楠方敏唐明铭刘运泉肖新海王瑞奇杨帆
Owner 湖南华菱湘钢节能发电有限公司
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