Oil-water separation pretreatment device for Fischer-Tropsch synthesis water, equipment comprising oil-water separation pretreatment device and treatment method

A pretreatment device, oil-water separation technology, applied in the separation method, grease/oily substance/suspended substance removal device, filtration treatment, etc., can solve the problem that the filtration and oil-water separation effect cannot meet the expected requirements, affect the long-term operation of the equipment, gather It can save equipment investment, occupy a small area, and reduce the number of equipment.

Active Publication Date: 2021-07-20
SYNFUELS CHINA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the filtering device in the above-mentioned prior art is used to remove larger suspended solids in water, but the filtering effect on smaller catalyst particles, heavy oil and wax particles in Fischer-Tropsch synthesis water is poor, and even the heavy oil and wax particles may be filtered. Particle clogging; and the existing separation process is long and equipment investment is high; during operation, because the water contains light oil, heavy oil and suspended solids at the same time, the filtration and oil-water separation effects cannot meet the expected requirements; the oil-water separation with coalescing filter elements Separator, when dealing with sewage containing suspended solids and heavy oil, the coalescing material is easily blocked, which seriously affects the oil-water separation effect and the long-term operation of the equipment. If the coalescing material is replaced frequently, it will not only affect the treatment process but also cause The operating cost is high, so the existing oil-water separation equipment needs to pre-filter the sewage containing suspended solids and heavy oil, precisely intercept the suspended solids, and remove part of the heavy oil at the same time, so as to reduce the operating load of the downstream oil-water separator

Method used

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  • Oil-water separation pretreatment device for Fischer-Tropsch synthesis water, equipment comprising oil-water separation pretreatment device and treatment method
  • Oil-water separation pretreatment device for Fischer-Tropsch synthesis water, equipment comprising oil-water separation pretreatment device and treatment method
  • Oil-water separation pretreatment device for Fischer-Tropsch synthesis water, equipment comprising oil-water separation pretreatment device and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0164] The Fischer-Tropsch synthetic water 101 entrained with oil and suspended solids from the Fischer-Tropsch synthesis unit is heated up to 35° C. after heat exchange by the Fischer-Tropsch synthetic water heat exchanger 1 (plate heat exchanger); the Fischer-Tropsch synthetic water 102 ( Water inlet pressure 0.1MPa, oil content 1000-2000mg / L, suspended matter content 358-500mg / L) enters the oil-water separation pretreatment device 2 from the water inlet; The water port is set at the lower part of the tank body, the drain port is set at the upper part of the tank body in a horizontal arrangement, and the oil discharge port is set at the top of the tank cover, where a cylindrical polypropylene filter bag with a filtration accuracy of 1 μm is used, and the filter bag is set on a U-shaped filter. pieces support the outside.

[0165] After the water flows through the filter bag, due to gravity, the emulsified oil floats to the top of the pretreatment device, and the height of th...

Embodiment 2

[0168] The Fischer-Tropsch synthetic water 101 entrained with oil and suspended solids from the Fischer-Tropsch synthesis unit is heated up to 40° C. after heat exchange by the Fischer-Tropsch synthetic water heat exchanger 1 (plate heat exchanger); the Fischer-Tropsch synthetic water 102 ( Water inlet pressure 0.2MPa, oil content 1000-2000mg / L, suspended matter content 200-300mg / L) enters the oil-water separation pretreatment device 2 from the water inlet; The water port is set at the lower part of the tank body, the drain port is set at the upper part of the tank body in a horizontal arrangement, and the oil discharge port is set at the top of the tank cover, where a cylindrical polyethylene filter bag with a filtration accuracy of 5 μm is used, and the filter bag is set in a U-shaped filter bag. pieces support the outside.

[0169] After the water flows through the filter bag, due to gravity, the emulsified oil floats to the top of the pretreatment device, and the height of...

Embodiment 3

[0172] The Fischer-Tropsch synthetic water 101 entrained with oil and suspended matter from the Fischer-Tropsch synthesis unit is heated up to 45°C after heat exchange by the Fischer-Tropsch synthetic water heat exchanger 1 (shell-and-tube heat exchanger); the heated Fischer-Tropsch synthetic water 102 (water inlet pressure 0.30MPa, oil content 1500-2000mg / L, suspended solids content 340-460mg / L) enters the oil-water separation pretreatment device 2 from the water inlet; , the water inlet is set at the lower part of the tank body, the drain port is set at the upper part of the tank body, the oil discharge port is set at the top of the tank cover in a horizontal arrangement, and coalescing fibers with a thickness of 70mm are set at the oil ascending channel in the tank body. A cylindrical polytetrafluoroethylene filter bag with a precision of 10 μm is set on the outside of the U-shaped filter support.

[0173] After the water flows through the filter bag, due to gravity, the em...

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Abstract

The invention relates to an oil-water separation pretreatment device for Fischer-Tropsch synthesis water, treatment equipment comprising the oil-water separation pretreatment device and a corresponding treatment method. Specifically, a specific filtering piece is arranged in the oil-water separation pretreatment device, so that suspended matters and oil in the Fischer-Tropsch synthesis water can be simply and effectively separated from the water. In addition, the oil-water separation pretreatment device is further in fluid communication with the alcohol separation tower, so that the Fischer-Tropsch synthesis water can be treated. And moreover, the filtering piece of the oil-water separation pretreatment device can be reversely blown according to the filtering pressure difference or the running time of the device, so that the effective interception effect of the filtering piece on oil and suspended matters is ensured.

Description

technical field [0001] The invention belongs to the field of Fischer-Tropsch synthesis, and in particular relates to a device for oil-water separation pretreatment of Fischer-Tropsch synthetic water, a treatment device for Fischer-Tropsch synthetic water comprising the device, and a treatment method for Fischer-Tropsch synthetic water. Background technique [0002] Fischer-Tropsch synthesis is a process for processing carbon-containing resources such as coal, natural gas, biomass, organic waste, and sludge to produce hydrocarbons. This process involves first converting carbon-containing resources into synthesis gas (CO and H 2 ), and then converted into organic hydrocarbons (mainly including normal alkanes, a small amount of isoparaffins and olefins, etc.) aldehydes, ketones, acids and esters, etc.), accompanied by the release of a large amount of heat. [0003] Among the Fischer-Tropsch synthesis projects that have been started, most of them involve the use of slurry bed r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40
CPCC02F1/001C02F1/40
Inventor 陈铁牛张浩贾梦磊刘琪耿春宇高军虎王缠和董根全杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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