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Corrosion inhibitor for galvanized pipe of evaporative condenser and process for cleaning condenser by adopting corrosion inhibitor

An evaporative condenser and corrosion inhibitor technology, applied in the field of condenser galvanized pipe cleaning, can solve the problems of galvanized pipe corrosion, alkali resistance, acid resistance, etc., to improve protection, reduce pressure, and increase polarity Effect

Active Publication Date: 2019-05-10
HANGZHOU GUANJIE IND CLEANING WATER TREATMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since zinc is an active metal, it is neither alkali-resistant nor acid-resistant. In turn, whether it is an organic descaling cleaning agent or an inorganic acid cleaning agent, it is easy to cause serious damage to the galvanized pipe during the cleaning process. Corrosion to a great extent

Method used

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  • Corrosion inhibitor for galvanized pipe of evaporative condenser and process for cleaning condenser by adopting corrosion inhibitor
  • Corrosion inhibitor for galvanized pipe of evaporative condenser and process for cleaning condenser by adopting corrosion inhibitor
  • Corrosion inhibitor for galvanized pipe of evaporative condenser and process for cleaning condenser by adopting corrosion inhibitor

Examples

Experimental program
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Effect test

Embodiment 1-9

[0054] Examples 1-9: A corrosion inhibitor for galvanized pipes of evaporative condensers, the components and corresponding qualities are shown in Table 1.

[0055] Each component and its corresponding mass (kg) in table 1 embodiment 1-9

[0056]

Embodiment 10

[0057] Embodiment 10: a kind of technology that adopts corrosion inhibitor to clean condenser, its steps are as follows:

[0058] S1: Prepare a solution of slime stripping agent with a mass concentration of 1% with water, pass it into a galvanized carbon tube, let it stand for 12 hours for cleaning, drain the water and foreign matter in the condenser, and replace it with new water;

[0059] S2: Add 12 kg of corrosion inhibitor for each ton of water in the condenser, turn on the water pump cycle, add the corrosion inhibitor to the circulating water of the condenser, and form a corrosion inhibition solution in the galvanized carbon tube;

[0060] S3: After the corrosion inhibitor solution circulates evenly in the galvanized carbon tube, the water pump continues to operate, and the fan is turned on, and scale cleaning agent is added to the corrosion inhibitor solution of the condenser at a rate of 5kg / min;

[0061] S4: When the zinc layer is exposed, immediately stop adding scale...

Embodiment 11

[0064] Embodiment 11: a kind of technology that adopts corrosion inhibitor to clean condenser, its steps are as follows:

[0065] S1: Prepare a solution of slime stripping agent with a mass concentration of 3% with water, pass it into a galvanized carbon tube, let it stand for 12 hours for cleaning, drain the water and foreign matter in the condenser, and replace it with new water;

[0066] S2: Add 11 kg of corrosion inhibitor for every ton of water in the condenser, turn on the water pump circulation, add the corrosion inhibitor to the circulating water of the condenser, and form a corrosion inhibition solution in the galvanized carbon tube;

[0067] S3: After the corrosion inhibitor solution circulates evenly in the galvanized carbon tube, the water pump continues to operate, and the fan is turned on, and scale cleaning agent is added to the corrosion inhibitor solution of the condenser at a rate of 4kg / min;

[0068] S4: When the zinc layer is exposed, immediately stop addin...

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Abstract

The invention discloses a corrosion inhibitor for a galvanized pipe of an evaporative condenser and a process for cleaning the condenser by adopting the corrosion inhibitor, belongs to the field of cleaning of galvanized pipes of condensers, and solves the problem that the galvanized layer is easy to corrode when the condenser is cleaned in the prior art. The corrosion inhibitor is composed of thefollowing components of, in parts by weight, 1-5 parts of cationic surface active agent, 0.5-2 parts of cationic surface active agent, 0.1-2 parts of ammonium salt, 0.1-2 parts of ammonium salt, 0.1-2 parts of dispersing agent, alkyl glycoside and cosurfactant; the number of the carbon atoms of the aldehyde compound is one of 3, 4 and 5, and the cationic surface active agent is nitrogen-containing organic amine derivative; the ammonium salt is composed of ammonium ions and acid radical ions; the mass ratio of the alkyl glycoside to the cationic surface active agent to the cosurfactant is (2-5):5:1. According to the corrosion inhibitor for the galvanized pipe of the evaporative condenser and the process for cleaning the condenser by adopting the corrosion inhibitor, the cationic surface active agent, the ammonium salt and the aldehyde compound are used in cooperation mode, so that the corrosion inhibition effect on the galvanized pipe is realized.

Description

technical field [0001] The invention relates to the field of cleaning galvanized pipes of condensers, in particular to a corrosion inhibitor for galvanized pipes of evaporative condensers and a process for cleaning condensers using the same. Background technique [0002] The evaporative condenser is the necessary equipment for the cold storage. It relies on circulating water to cool the liquid ammonia. It is composed of a fan, a condensing plate, a heat exchanger, a box and other components, and the condensing plate is a galvanized carbon steel pipe. After one to two years of operation, the inner wall of the galvanized pipe of the condenser will form a carbonate hard scale package, the serious scale layer reaches more than ten millimeters, and there is biological slime attached. Scaling will lead to a significant drop in the heat transfer effect of the galvanized tube in the condenser, an increase in the pressure of liquid ammonia, and an increase in the temperature of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/04C23G3/04
Inventor 黄冠土
Owner HANGZHOU GUANJIE IND CLEANING WATER TREATMENT TECH