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Non-stratified oil pit harmless treatment method and oil sludge fuel block prepared thereby

A harmless treatment, non-layered technology, applied in chemical instruments and methods, fixed/solidified sludge treatment, fuel, etc., can solve the problem of non-hazardous treatment and resource utilization of oil sludge, investment in oily sludge pit treatment Large, high content of toxic and harmful substances, etc., to achieve good effect of oil sludge fuelization, improve availability, and improve the quality of resource-based products

Active Publication Date: 2019-09-20
哈尔滨工大环能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing methods for treating oily sludge mainly include: incineration, coking, landfill, extraction, pyrolysis, solidification, chemical demulsification and biological treatment, etc. Although these treatment methods can be used to a certain extent Recycling and utilization of useful substances in oil sludge, but it will cause re-pollution to the environment, and requires a lot of investment, and there are problems of large investment and low treatment efficiency in the treatment of oily sludge pits
Chinese patent application CN201710309039.5 discloses a sludge modifier and a method for converting sludge into a new type of regenerative solid fuel. Although the patent application can chemically modify the sludge, it can convert the sludge into However, the regenerated solid fuel generated in this patent application still has a high content of heavy metals leached from the fly ash produced after combustion and the content of toxic and harmful substances such as dioxins, which will still cause re-pollution to the environment. Problem; Fundamentally speaking, the existing technology has not achieved the harmless treatment and resource utilization of oil sludge

Method used

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  • Non-stratified oil pit harmless treatment method and oil sludge fuel block prepared thereby
  • Non-stratified oil pit harmless treatment method and oil sludge fuel block prepared thereby
  • Non-stratified oil pit harmless treatment method and oil sludge fuel block prepared thereby

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Experimental program
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Effect test

Embodiment 1

[0064] ①Sieving the oily sludge in the non-layered oil pit to remove solid waste to obtain oily sludge; dehydrating the obtained oily sludge to obtain oily wastewater and dewatered oily sludge with a moisture content of 15%, and then The obtained oil-containing wastewater is subjected to oil-water separation to obtain waste oil and wastewater, and the obtained wastewater is subjected to sewage treatment.

[0065] ② Mix the dewatered oil sludge and the waste oil in step ① uniformly to obtain a primary mixed sludge with an oil content of 40%, then add a sludge modifier to the primary mixed sludge and mix uniformly to obtain a pretreated sludge ; Wherein, the mass ratio of the primary mixed sludge and the sludge modifier is 100:20; the sludge modifier is composed of auxiliary material (straw) 66.5% in mass percentage, curing agent 16.5%, calcium oxide 6 %, bentonite 9% and cement 2%; the curing agent consists of methacryloyloxyethyltrimethylammonium chloride 40%, dimethyl diallyl...

Embodiment 2

[0069] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0070] In step ②, the oil sludge modifier is composed of 50% of auxiliary material (stalk) in mass percentage, 27% of curing agent, 6% of calcium oxide, 12% of bentonite and 5% of cement; In percentage terms, it is composed of 35% methacryloyloxyethyl trimethyl ammonium chloride, 25% dimethyl diallyl ammonium chloride, 25% acrylamide and 15% carboxymethyl cellulose.

Embodiment 3

[0072] Embodiment 3 is basically the same as Embodiment 1, the difference is:

[0073] In step ②, the oil sludge modifier is composed of 66.5% of auxiliary materials (straw) in mass percentage, 16.5% of curing agent, 6% of calcium oxide, 8.5% of bentonite, 2% of cement and 0.5% of oil absorbing agent; The curing agent consists of 40% methacryloxyethyltrimethylammonium chloride, 25% dimethyl diallyl ammonium chloride, 25% acrylamide and 10% carboxymethyl cellulose in mass percent ; The oil-absorbing agent is composed of hydrogenated styrene-butadiene-styrene elastomer and high-density polyethylene with a mass ratio of 1:12.

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Abstract

The invention relates to a non-stratified oil pit harmless treatment method and an oil sludge fuel block prepared thereby. The method includes: sieving homogeneous oily sludge to remove solid waste to obtain oil sludge; conducting dehydration treatment on the oil sludge to obtain dehydrated oil sludge and oily wastewater, and performing oil-water separation on the oily wastewater to obtain waste oil and wastewater; conducting sewage treatment on the wastewater; mixing the dehydrated oil sludge and waste oil to obtain preliminary mixed oil sludge, adding an oil sludge modifier and mixing the substances evenly to obtain pretreated oil sludge, wherein the oil sludge modifier includes, by mass percentage, 50-66.5% of an auxiliary material, 13-27.5% of a curing agent, 3-10% of calcium oxide, 3-15% of bentonite and 0.3-5% of cement; molding the pretreated oil sludge and then placing the product at room temperature, thus obtaining an oil sludge fuel block. The method provided by the invention can realize harmless, clean and recycling treatment of oil sludge in non-stratified oil pit, and the content of heavy metals leached out of the combustion product fly ash of the prepared oil sludge fuel block and contained dioxin and other substances is very low.

Description

technical field [0001] The invention relates to the technical field of oily sludge treatment, in particular to a method for harmless treatment of non-layered oil pits and an oily sludge fuel block prepared therefrom. Background technique [0002] With the development of the petroleum industry, the output of oily sludge is increasing. Oily sludge, that is, oily sludge sand, refers to a large amount of oily solid waste produced in the process of crude oil and natural gas exploration, exploitation, gathering and transportation, refining, etc. It is generally divided into oily sludge in oil fields and petrochemical industry (mainly oil refineries) of oily sludge. Oilfield oily sludge includes oily sludge on the ground during oilfield development, oil pits for centralized storage of oily waste, oily sludge at the bottom of tanks during production and operation of combined stations, and oily sludge during operation of sewage stations. [0003] Oily sludge refers to the mixture o...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/127C10L5/48C10L9/10
CPCC02F11/00C02F11/008C10L5/48C10L9/10C02F11/127Y02E50/30Y02E50/10
Inventor 薛岩邱微
Owner 哈尔滨工大环能科技有限公司
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