Cleaning agent for sewage collection pipeline of high-sulfur gas field and use method of cleaning agen

Abstract

The invention discloses a cleaning agent for a sewage collection pipeline of a high-sulfur gas field and a use method of the cleaning agent, and provides a cleaning agent suitable for fouling in a sewage collection pipeline of a high-sulfur gas field. The cleaning agent includes a chelating agent, an anionic surfactant, sodium hydroxide, sodium phosphate, ethylene glycol and an accelerator. The cleaning agent is an alkaline cleaning agent, and the pH value can be controlled in a range of 10 to 14, and the cleaning agent can efficiently dissolve fouling in the sewage collection pipeline of thehigh-sulfur gas field at a lower use temperature.

Description

technical field [0001] The invention relates to the technical field of cleaning, in particular to a cleaning agent for a sewage collection pipeline of a high-sulfur gas field and a method for using the same. Background technique [0002] The production and operation of high-sulfur gas fields will produce a large amount of sewage, which is collected through various separators in the gas gathering station, and finally transported by the sewage collection pipeline to the supporting sewage treatment station for treatment. After a long period of continuous operation, a large amount of sulfur-containing scale will be deposited in the sewage collection pipeline. These scales have complex components and have the following characteristics: [0003] (1) The scale is tight and thick, with strong adhesion, and can firmly adhere to the inner wall of the sewage collection pipeline. [0004] (2) The content of sulfide is high, mainly including elemental sulfur and organic sulfide, and the...

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Problems solved by technology

[0005] (3) A small amount of cuttings and corrosion products exist

[0006] (4) Most of the fouling in the sewage collection pipeline exists in the low-lying and easy-to-water sections of the pipeline

[0007] (5) The fouling part is uneven, the lower half of the sewage collection pipeline has more deposits, and the upper half has almost no fouling

[0014] 1. Physical pig cleaning is only suitable for soft scale or hard scale with small thickness, and cannot be applied to the dense and thick scale in the sewage collection pipeline of high-sulfur gas fields

[0015] 2. Although pickling has a fast reaction speed and good cleaning effect, it will react with sulfide in the fouling in the sewage collection pipeline of high-sulfur gas fields to produce hydrogen sulfide, which is not suitable for on-site working conditions

[0016] 3. Use a sulfur-dissolving agent for cleaning, limited by the single effect of the sulfur-dissolving agent, which can only act on elemental sulfur, and cannot effectively clean the sulfur-containing scale in the sewage collection pipeline of high-sulfur gas fields

[0019] The above-mentioned prior art has the following problems: the main components of existing sulfur-dissolving agents or similar sulfur-dissolving agents are water-soluble organic amines or mercaptans and thioethers, which have an unpleasant odor and strong toxicity. Moreover, it is highly volatile, and it is easy to cause harm to the environment and the body of operators during the construction process and subsequent residual liquid treatment process. Some of them are already prohibited from use.

The volatilized gas phase of these substances is flammable and explosive, which will bring serious safety hazards to construction and residual liquid treatment.

In addition, these substances have a strong swelling effect on equipment seals, especially rubber seals, causing seal damage

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