Preparation method and application of polypropylene fibers

A polypropylene fiber, polypropylene technology, applied in the field of water treatment, can solve the problems of reducing equipment service time, reducing coalescing separation effect, increasing pressure drop of coalescer, etc., to improve mechanical and thermal properties, and excellent separation performance. , The effect of preventing stress cracking and warping deformation

Active Publication Date: 2021-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diameter of the coalescing fiber material will have an impact on the coalescence separation effect. The fine material diameter has a large surface area and small pore size, which can promote the coalescence process and separation efficiency between droplets, but the diameter of the fiber material If it is too small, the pressure drop of the coalescer will increase, and the resistance will increase accordingly, and the increase in pressure will reduce the effect of coalescence and separation, and at the same time, the fiber diameter will be too small to affect the strength of the material itself, thereby reducing the service life of the equipment

Method used

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  • Preparation method and application of polypropylene fibers
  • Preparation method and application of polypropylene fibers
  • Preparation method and application of polypropylene fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-39 and comparative example 1-22

[0067] (1) Take the polypropylene masterbatch for drying treatment, add it to the spinning kettle with a stirring device, mix it with the antioxidant in proportion, heat it to a certain temperature to melt, and stir it under the condition of nitrogen for a certain period of time, after stopping the stirring Let stand for a period of time to defoam, and obtain polypropylene spinning solution.

[0068] (2) After the spinning solution is filtered by the filter screen, the spinning solution is transported to the spinneret by a metering pump, and then the spinning solution melt is extruded at a constant rate to become a polypropylene fiber filament, and the filament is cooled in a three-stage water bath. Afterwards, the polypropylene fiber filaments are collected by winding with a traction wheel.

[0069] (3) The obtained polypropylene fiber is first soaked for a period of time with 0.5mol / L of HCI solution, then soaked for a period of time with 0.5mol / L of NaOH solution, then rins...

Embodiment 40-82 and comparative example 23-48

[0076] use figure 1 The shown device treats oily wastewater from a refining and chemical enterprise. The wastewater has a pH of 7.0 and an oil content of 1366mg / L.

[0077] (1) The polypropylene fibers prepared in Examples 1-39 and Comparative Examples 1-23 were packed into the bed of the coalescer in layered compaction, and the filling ratio was 1 / 2.

[0078] (2) Pump the oily sewage with a temperature of 30-50°C in the liquid storage tank into the sewage tank through the sewage pump;

[0079] (3) Open the flow regulating valve, power and pressure regulator valve and air source, pump the liquid in the sewage tank into the coalescer through the feed pump, and control the influent flow at 0.1-0.5m by adjusting the flow regulating valve 3 / h.

[0080] After the operation is stable, the data is measured and the oil removal rate is calculated.

[0081] The data of each embodiment and comparative example are shown in Table 2.

[0082]

[0083]

[0084]

[0085] Any ref...

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Abstract

The invention discloses a preparation method of polypropylene fibers and the polypropylene fibers prepared by the method. The preparation method comprises the following steps: S1, mixing polypropyleneresin with an antioxidant, and then carrying out spinning treatment to obtain polypropylene filaments; and S2, carrying out three-stage cooling treatment on the polypropylene filaments to obtain thepolypropylene fibers. The method disclosed by the invention is simple and convenient in process and short in production path; and the polypropylene fibers prepared by the method disclosed by the invention are moderate in pore diameter, high in mechanical strength and excellent in separation performance, and are high in oil removal efficiency of sewage when being applied to treatment of oily sewage. The invention also provides a device for treating oily sewage. The device has the advantages of being simple in structure, low in power consumption, good in removal effect on oil stains in the sewage without adding any medicament, and low in pollution, and has good application prospect in the field of oily sewage treatment.

Description

technical field [0001] The invention relates to a preparation method of polypropylene fiber, a polypropylene fiber material prepared by the method, and its application in treating oily sewage, and also relates to a device for treating oily sewage, which belongs to the technical field of water treatment. Background technique [0002] The sources of oily sewage are quite extensive. In the petrochemical industry, a large amount of oily sewage will appear during the refining of petroleum and the processing of various materials. Oily sewage will also be formed during the cleaning and use of various pipelines. Discharge of untreated oily sewage into the soil or rivers and lakes will lead to environmental degradation, bring a series of disasters, and seriously affect human health. After the oily sewage is treated and discharged up to the standard, on the one hand, it can save two precious resources, oil and water, and realize the recycling and reuse of resources. On the other hand,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10B01D17/022C02F1/40
CPCD01F6/46D01F1/10B01D17/0202C02F1/40
Inventor 杨丽奚振宇王玉杰
Owner CHINA PETROLEUM & CHEM CORP
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