On-line non-stop cleaning process for brine pipeline

Abstract

The invention discloses an online non-production-halt cleaning process for a brine transportation pipeline. When the daily outward transportation amount of the brine transportation pipeline is lower than 13,050 cubic meters in 3-5 continuous days, clear water is injected into a buffer tank communicating with the feed end of a first station of the brine transportation pipeline, so that brine entering the brine transportation pipeline is made to be light brine; and when the daily outward transportation amount of the brine transportation pipeline reaches or is higher than 13,200 cubic meters in at least 2 continuous days, clear water injected into the buffer tank is stopped, so that brine entering the brine transportation pipeline is raw brine. By the adoption of the structure, scales in the brine transportation pipeline can be cleaned on the premise that production is not stopped, the scales in the brine transportation pipeline can be effectively removed under the scouring action of the brine transported through the brine transportation pipeline, and the influence on production and benefits of enterprises is small.

Description

technical field [0001] The invention relates to the field of brine transportation pipelines, in particular to an online non-stop cleaning process for brine transportation pipelines. Background technique [0002] The total length of the high-pressure long-term brine pipeline in the management department of brine mining and transportation is 173.8Km. The main material is Φ508*7 steel pipe with a volume of 33,000 square meters. The external anti-corrosion is made of reinforced petroleum asphalt anti-corrosion, and the internal anti-corrosion is made of solvent-free liquid epoxy coating. The normal state The lower output pressure is 5.4MPa, the flow rate is 550 m3 / h, and the flow time of brine in the pipeline is about 60h. More than 90% of the sales revenue of our department comes from this pipeline, which is a real "artery" of the brine collection and transportation management department. [0003] The pipeline transportation medium is Glauber's salt type brine, which has a hig...

AI Technical Summary

Problems solved by technology

[0012] As mentioned above, the scale in our pipeline is mainly composed of calcium sulfate crystals. The crystals are columnar, and the combination is dense and massive. The density is 2.61g / cm3, and the melting point is 1450 ° C. It is a kind of stubborn dirt, which is difficult to remove by conventional methods

[0013] 2. The brine pipeline is long and difficult to clean:

[0014] The pipeline in my place is 173Km long, with an internal volume of more than 30,000 square meters, which is not easy to clean and requires a lot of work

[0015] 3. The liquid in the pipeline is brine, and improper cleaning may easily cause environmental pollution

[0016] 4. Regarding the cleaning method of long-distance brine pipelines, there is no relevant experience at home and abroad to learn from

Disadvantages: no transceiver device; the pipeline is long and easy to be partially buried

Disadvantages: The cleaning time is longer, and the appropriate cleaning medium needs to be selected

Disadvantages: the pipeline distance is long, it is not easy to construct, and the cleaning effect is poor

Disadvantages: the subsequent treatment of waste liquid is difficult; the dosage of medicine is large; the cost is high

[0025] However, ordinary cleaning methods must require the pipeline to stop production, and because the length of the brine pipeline is extremely long, the amount of scaling is extremely large, and the time required for flushing is very long, so it still has a great impact on the benefits of the enterprise; and for The cleaning status of the scaling in the brine pipeline cannot be known