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Technique for feeding water to boiler of reclaiming heat from treating sewage of thick oil

A technology for heavy oil sewage and boiler feed water, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, ion-exchanged water/sewage treatment, etc. The effect of saving water resources, convenient operation and saving heat energy

Inactive Publication Date: 2005-01-12
LIAOHE GASOLINEEUM EXPLORATION BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Liaohe Oilfield produces more than 8 million tons of heavy oil, ranking first in the country, and the daily production of heavy oil produced water is about 71×10 4 Ton. At present, after proper treatment, only a small part of this part of sewage is transported to the thin oil block for production and reinjection, while most of it is invalidly reinjected into the formation. As a result, the groundwater level drops sharply, even exceeding the underground water level. critical water level, resulting in a large amount of heavy oil production invalid re-injection and serious shortage of water supply, therefore, the treatment and reuse of heavy oil produced water is bound to be done

Method used

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  • Technique for feeding water to boiler of reclaiming heat from treating sewage of thick oil
  • Technique for feeding water to boiler of reclaiming heat from treating sewage of thick oil
  • Technique for feeding water to boiler of reclaiming heat from treating sewage of thick oil

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: The main technological process of sewage treatment, using heavy oil sewage 1 to be transported to the regulating tank 2 through the PPR non-metallic pipeline, then adding chemical agents 3 into the pipeline, and lifting the sewage into the high-efficiency degreaser 5 with the lifting pump 4, Then add chemical coagulant 6 and coagulant 7 to the pipeline to send the dosing sewage into the flotation machine 8, add magnesium salt 9 and liquid sodium oxide 10 to the sewage with coagulant and coagulant , and then let the sewage enter the mechanical acceleration clarifier 11 from the pipeline to settle, then enter the filter suction tank 12 through the pipeline for buffering, send it to the filter pump 13, pressurize and lift the sewage, send it into the coarse filter 14, and then Add filter aid 15 to the sewage in the outlet pipeline, send it into the fine filter 16 and ion exchange softener 17 and add chemical agent 18 to remove dissolved oxygen in the water, an...

Embodiment 2

[0019] Embodiment 2: Sewage treatment sub-process (to the treatment of the relatively dirty sewage 20 from the coarse filter, fine filter and ion exchange softener), flow into the sewage pool A21 through the pipeline, and then pressurize and lift the sewage by the lift pump 22 , and add coagulant 23 into the pipeline and send it to the coagulation settler 24, so that the sewage enters the sewage pool B25 from the pipeline for buffering, and then pressurizes with the lifting pump 26B to lift the sewage, and the water is discharged at this time It is sent to the regulating water tank and the mechanical acceleration clarifier to continue the sewage recycling treatment.

Embodiment 3

[0020] Embodiment 3: Sludge dehydration process: (by the sludge 28 that mechanically accelerates the clarifier filter pump and fine filter outlet blowdown place to produce)

[0021] Enter the sludge tank 29 from the pipeline, lift with the sludge lift pump A30, add the coagulation agent 31, and the coagulant aid 32 enters the van compressor 35 after passing through the sludge thickener 23 and the sludge lift pump 34 , and then the dehydrated sludge is transported out with belt conveyor 36.

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Abstract

In this invention, separated thick oil sewage is deeply processed to be used as hot mineral boiler feed water reaching standard (sy0027-94) of hot mineral feed water, thick oil sewage is fully utilized to save boiler fuel and to realize circular utilization of thick oil sewage.

Description

Technical field: [0001] The invention relates to a process for treating heavy oil sewage and recycling thermal recovery boiler feed water, which belongs to the treatment method of heavy oil sewage in oilfields. Background technique: [0002] Domestically, heavy bituminous crude oil is called heavy oil. Heavy oil is mainly exploited by thermal power, usually using steam huff and puff or steam flooding, that is, the water is treated to the inlet water index of the thermal recovery boiler, pressurized into the thermal recovery boiler, and heated by the thermal recovery boiler to a temperature of 315°C, a pressure of 17Mpa, and a dryness of 80%. The left and right saturated steam is distributed to the wellhead through the gas pipeline, and injected into the oil layer through the wellhead to increase the temperature of the oil layer and reduce the viscosity of the heavy oil for production. The mixed liquid (oil and water) produced from the wellhead is collected and transported t...

Claims

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Application Information

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IPC IPC(8): C02F1/40C02F1/42C02F1/52C02F9/02
Inventor 孙绳昆
Owner LIAOHE GASOLINEEUM EXPLORATION BUREAU
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