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Method for washing condenser of thermal power plant without intermission

A technology for condensers and thermal power plants, which is applied in the field of non-stop cleaning of thermal power plant condensers. It can solve problems such as large manpower, material and financial resources, hazards to unit safe operation, and scaling that cannot be removed in time, and achieves a large cleaning range. , Reduce the installation workload and reduce the cleaning cost

Active Publication Date: 2013-03-27
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical cleaning in this shutdown state requires huge and complex temporary system equipment, which consumes a lot of manpower, material resources and financial resources.
In addition, the economic loss caused by less power generation due to shutdown and cleaning is also relatively large
In the event of a peak power consumption, the unit cannot be shut down, and the scaling cannot be removed in time, which will bring great harm to the safe operation of the unit

Method used

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  • Method for washing condenser of thermal power plant without intermission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] like figure 1 As shown, a non-stop cleaning method for a thermal power plant condenser comprises the following steps:

[0018] ①Circulating cooling water system volume 2000m 3 , add quaternary ammonium salt (quaternary ammonium salt is octadecyl dimethyl benzyl ammonium chloride, produced by Shandong Changjiang Chemical Co., Ltd.) into the suction pool 1 of the circulating water pump to keep the concentration at 50ppm, and the circulating water flow rate is about 1.0m / s, The aqueous solution containing quaternary ammonium salt flows from the circulating water pump suction pool 1 through the circulating water pump 2, the condenser 4 and the cooling water tower 6, and then returns to the circulating water pump suction pool 1 to circulate and clean the circulating cooling water system, and cool down after about 36 hours The water column basically returned to its original color; the circulating cooling water system stopped sewage discharge during the addition of quaternary...

Embodiment 2

[0022] like figure 1 As shown, a non-stop cleaning method for a thermal power plant condenser comprises the following steps:

[0023] ① Circulating cooling water system volume 28000m 3 , add isothiazolinone to the circulating water pump suction pool 1 to keep the concentration at 100ppm, the circulating water flow rate is about 1.2m / s, and the aqueous solution containing isothiazolinone flows from the circulating water pump suction pool 1 through the circulating water pump 2 and the condenser 4 After cooling water tower 6, return to the circulating water pump suction pool 1, and circulate and clean the circulating cooling water system. After about 60 hours, the cooling water tower column basically returns to its original color; After the stripping stage is completed, the sewage discharge will be resumed, and the sewage will be discharged to about 10,000 tons. There is basically no slime residue in the water, and the same amount of circulating water will be replenished at the ...

Embodiment 3

[0027] like figure 1 As shown, a non-stop cleaning method for a thermal power plant condenser comprises the following steps:

[0028] ①The volume of circulating cooling water system is 75000m 3 , add isothiazolinone to the circulating water pump suction pool 1 to keep the concentration at 180ppm, control the circulating water flow rate at 2.0m / s, and the aqueous solution containing isothiazolinone flows from the circulating water pump suction pool 1 through the circulating water pump 2 and the condenser 4 and the cooling water tower 6, return to the circulating water pump suction pool 1, and circulate and clean the circulating cooling water system. After about 72 hours, the cooling water tower column basically returns to its original color; After the mud stripping stage is completed, the sewage discharge will be resumed, and the sewage will be discharged to about 18,000 tons. There is basically no slime residue in the water, and the same amount of circulating water will be re...

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PUM

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Abstract

The invention relates to a method for washing a condenser of a thermal power plant without intermission. The method comprises the following steps: (1) adding a slime remover into a circulating water pump suction pool, wherein the concentration of the slime remover is kept at 50-200ppm; a water solution flows through a circulating water pump, a condenser and a cooling water tower from the circulating water pump suction pool to return to the circulating water pump suction pool for circularly washing until a cooling water tower column restores an original color; (2) controlling the flow velocity of circulating cooling water to be 0.6-2.2m / s based on 50-1000g / m<3> of the amount of scale buildup of a circulating cooling water system, adding 50-200ppm amino trimethylene phosphonic acid, 20-100ppm polyacrylate and 5-20ppm corrosion inhibitor to the circulating water pump suction pool, and controlling pH value of the solution of an inlet of the condenser to be between 5 and 6 by adding inorganic acid; (3) and detecting the temperature of two ends of the condenser and completing washing when the temperature difference of two ends of the condenser is less than or equal to 4 DEG C. With the adoption of the washing method of the invention, normal power generation of a set is not affected, and the cost can be effectively saved.

Description

technical field [0001] The invention belongs to the technical field of condenser cleaning, and in particular relates to a non-stop cleaning method for a thermal power plant condenser. Background technique [0002] The condensing equipment of the thermal power generation unit is an important heat exchange equipment, which is used as a heat exchanger to condense the exhaust gas of the steam turbine into water, and to form and maintain the required vacuum. Condensing equipment includes condensers, air extractors, condensate pumps and circulating water pumps, of which the condenser is the most important component. The condenser is the cold source in the whole thermodynamic cycle. Its main function is to form a relatively high vacuum at the exhaust port of the steam turbine, so that the steam expands to the lowest pressure in the steam turbine, increases the available enthalpy drop of the steam in the steam turbine, and improves the thermal efficiency of the cycle; Condensate th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28G9/00
Inventor 张春雷吴文龙张小霓李东梅
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST