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A Method of Controlling Corrosion and Odor in Pipelines

A pipeline and smelling technology, applied in the field of pipeline protection, can solve the problems of environmental risks and not easy to degrade, and achieve the effect of inhibiting bacterial activity and good application prospects.

Active Publication Date: 2022-02-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these fungicides may pose risks to the environment due to their toxicity, and these substances are not easy to degrade in the environment

Method used

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  • A Method of Controlling Corrosion and Odor in Pipelines

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Experimental program
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Effect test

Embodiment 1

[0026] The experiment of biofilm inactivation using potassium ferrate was carried out as follows:

[0027] Sewer simulation reactor construction and biofilm cultivation: build a drainage pipeline simulation system, the reactor is cylindrical, with a diameter of 10cm, a height of 20cm, and an effective volume of 1L. A small water tank is connected above the reactor to ensure airtightness. The reactor is equipped with a sampling port, a pH meter installation port, etc. Three strings of plastic carriers with a diameter of about 1 cm are hung in the reactor. Pipeline biofilm will adhere to the inner wall of the reactor and the plastic carrier, which can be removed for biofilm sample analysis. Use actual municipal sewage to inoculate and cultivate pipeline biofilms, use peristaltic pumps to feed water, and adopt intermittent water feeding mode. The water feeding time is 2 minutes, the water feeding volume is 1L, and the water feeding interval is 6 hours, so as to simulate the real...

Embodiment 2

[0033] Put ferrate solid directly into the simulated pipeline system, and measure its influence on biofilm and odor removal effect, as follows:

[0034]The simulated pipeline system and the cultivation of the biofilm are the same as those described in Example 1. After the biofilm reaches a pseudo-steady state, the dosing experiment can be started. The experimental operation is as follows:

[0035] Start the peristaltic pump for ten minutes, pump 5L of water into the reactor, and make it completely discharge the original water in the reactor. Immediately put a specific quality of potassium ferrate solid from the dosing hole to make the concentration 60mg-Fe / L, add the same quality of potassium ferrate again after 20min and 40min, dosing three times in total, pump 1L of fresh sewage after 1 hour , Drain the water containing potassium ferrate, carry out the biofilm recovery growth stage, and test the hydrogen sulfide production rate every 2-14 days.

[0036] The experimental res...

Embodiment 3

[0038] A method of controlling pipeline corrosion and smell, which uses ferrate to deal with pipeline corrosion and smell problems. The potassium ferrate used in this example has an action concentration of 10mgFe / L, and the actual dosage concentration is adjusted according to the water quality. Put the corresponding amount of potassium ferrate directly into the pipeline.

[0039] Use potassium ferrate to treat the pipeline intermittently, add potassium ferrate to the pipeline in a short period of time, and after 5 days, use potassium ferrate again to treat the drainage pipeline in a short period of time.

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Abstract

The present invention relates to a method of controlling pipeline corrosion and odor. In this method, ferrate is added to pipeline systems with corrosion and smell problems (such as sewage pipes, rainwater pipes, reclaimed water pipes, etc.), and the dosage and dosage of ferrate are determined according to the water flow and water intake mode. frequency. Compared with the existing technology, the outstanding advantages of the present invention are that the action time is short, and it has long-term control effect on pipeline biofilm and smell. It uses intermittent dosing mode, less dosage, simple operation and management, and can improve downstream water quality at the same time. Phosphorus removal efficiency of treatment facilities and dewatering performance of anaerobic digested sludge.

Description

technical field [0001] The invention relates to the field of pipeline protection, in particular to a method for controlling pipeline corrosion and smell. Background technique [0002] The urban pipe network is an important municipal infrastructure that covers a wide area and costs a lot of money. As an integral part of the urban water supply and delivery system, it undertakes the important responsibility of water delivery and water supply. Their operation and management status not only directly affects the quality of urban water environment, but also is closely related to people's life. The corrosion and smell of the pipe network have always been a problem faced by countries all over the world. On the one hand, the pipeline damage caused by the corrosion of the pipeline network will bring huge maintenance expenditures to the finances, and the resulting pipeline perforation and rupture will lead to sewage leakage. Groundwater is polluted. According to the survey results of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/50
CPCC02F1/50C02F2303/02
Inventor 孙婧严小芳倪丙杰曾舒婷吴书林黄琦苏
Owner TONGJI UNIV