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A kind of microfiltration membrane and process method of using microfiltration membrane to purify coal tar raw material

A process method and microfiltration membrane technology, which are applied in the field of coal tar purification and treatment, can solve problems such as the inability to achieve high-yield purification of coal tar, and achieve the effects of avoiding the fraction cutting process, reducing the probability of coking and corrosion, and low energy consumption.

Active Publication Date: 2018-01-12
SHANGHAI LANKE PETROCHEM ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to solve the technical problem that the existing technology cannot realize the high-yield purification of coal tar

Method used

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  • A kind of microfiltration membrane and process method of using microfiltration membrane to purify coal tar raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The parameters of raw coal tar are: QI: 15000ppm; density: 1030kg / m 3 ; Metal: 250PPm; Salt content 84mg / L; Water: 1.8%.

[0040] High-speed centrifugation operating conditions: operating temperature: 82°C; rotating speed: 3000r / min.

[0041] Microfiltration demulsification operating conditions: microfiltration membrane precision: 0.5μm; temperature: 120°C; operating pressure: 0.8MPa.

[0042] Operating conditions for electrical desalination: electric field strength: 1000V / cm; metal removal agent: 70μg / g; operating temperature: 135°C; operating pressure: 0.3MPa.

[0043] Energy consumption: 50kw / t.

[0044] Parameters of purified coal tar: Density: 1029kg / m 3 ; QI: 20ppm; metal: 30ppm; salt content: 4mg / L; water: 0.15%; raw material yield: 95.8%.

Embodiment 2

[0046] The parameters of raw coal tar are: QI: 6000ppm; density: 1016kg / m 3 ; Metal: 200PPm, salt content 60mg / L; Water: 2.2%.

[0047] High-speed centrifugation operating conditions: operating temperature: 80°C; rotating speed: 2200r / min.

[0048] Microfiltration demulsification operating conditions: microfiltration membrane precision: 0.2μm; temperature: 110°C; operating pressure: 0.5MPa.

[0049] Operating conditions for electrical desalination: electric field strength: 800V / cm; metal removal agent: 50μg / g; operating temperature: 130°C; operating pressure: 0.3MPa.

[0050] Energy consumption: 50kw / t.

[0051] Parameters of purified coal tar: Density: 1016kg / m 3 ; QI: Not detected; Metal: 20ppm; Salt content: 1mg / L; Water: 0.12%; Raw material yield: 96.5%.

Embodiment 3

[0053] The parameters of raw coal tar are: QI: 4000ppm; density: 1016kg / m 3 ; Metal: 220PPm; Salt content 75mg / L; Water: 2.0%.

[0054] High-speed centrifuge operating conditions: operating temperature: 80°C; rotating speed: 2600r / min.

[0055] Microfiltration demulsification operating conditions: microfiltration membrane precision: 0.3μm; temperature: 120°C; operating pressure: 0.6MPa.

[0056] Operating conditions for electrical desalination: electric field strength: 1000V / cm; metal removal agent: 60μg / g; operating temperature: 135°C; operating pressure: 0.3MPa.

[0057] Energy consumption: 50kw / t.

[0058] Parameters of purified coal tar: Density: 1016kg / m 3 ; QI: 10ppm; metal: 25ppm; salt content: 1mg / L; water: 0.1%; raw material yield: 97%.

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Abstract

The invention discloses a microfiltration membrane and a process method for purifying coal tar raw materials by using the microfiltration membrane. The microfiltration membrane adopts the support layer and the filtration control layer to form a whole through high-temperature sintering; the support layer is sintered by 20-200 μm metal powder, and the thickness is 1.5-2.2 mm; the filtration control layer is obtained by using The metal spherical particles of 1-5 μm are uniformly coated on the support layer and fired at high temperature, and the thickness is 0.2mm-0.7mm. The process of purifying coal tar raw materials by using microfiltration membranes is as follows: After the coal tar raw materials are subjected to high-speed centrifugation and coarse separation by a high-speed centrifuge, the microfiltration membranes are used to filter and demulsify, and the obtained filtrate is further subjected to electric desalination and flash evaporation processes After removing impurities and moisture, the coal tar purification raw material is obtained. The invention uses a microfiltration membrane with a specific structure to realize two functions of filtration and demulsification, and proposes a coal tar raw material purification process with low energy consumption, high yield, and avoiding QI secondary generation during the treatment process.

Description

technical field [0001] The invention relates to the technical field of coal tar purification treatment, in particular to a microfiltration membrane and a process method for purifying coal tar raw materials by using the microfiltration membrane. Background technique [0002] Coal tar is a multi-component mixture obtained during carbonization, gasification or pyrolysis of coal. Coal tar contains more oxygen-containing compounds, unsaturated hydrocarbons, sulfur and nitrogen compounds, coal powder, coke particles, mechanical impurities (also known as quinoline insoluble matter-QI, hereinafter referred to as QI) and water and water-soluble impurities, and asphalt High content of asphaltenes (about 8% asphaltene), poor product stability (light stability, storage stability, oxidation stability), high pollution in the combustion exhaust, does not meet the national standards, can not be directly used as fuel factory, must be further processed Only after deep processing can it be pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/10B01D67/00B01D61/14C10C1/00
Inventor 马洪玺张文军朱洪李雷
Owner SHANGHAI LANKE PETROCHEM ENG & TECH
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