Multi-component petroleum sludge treatment preparation based on coconut shell material and preparation method thereof

Abstract

The invention belongs to the technical field of petroleum sludge treatment, and particularly discloses a multi-component petroleum sludge treatment preparation based on a coconut shell material and a preparation method of the multi-component petroleum sludge treatment preparation. The preparation method comprises the following steps: mixing 1-8 parts of a coconut shell mixture, 1-2 parts of chitin-containing powder, 1-2 parts of coconut juice, 1-3 parts of natural water body deposited sludge, 1-10 parts of waste plant crushed particles, 10-20 parts of water and 1-10 parts of petroleum sludge to obtain mixed paste; then culturing the mixed paste, filtering when the surface of the mixed paste is covered with hyphae, and collecting filtrate to obtain the preparation. The preparation prepared by the invention has the advantages of short treatment time and high treatment efficiency; in addition, the preparation components are all natural components, so that secondary pollution to the environment can be avoided; and the application range is wide, and the device can be used from low-end manual operation to high-end bioreactors.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum sludge treatment, and in particular to a multi-component petroleum sludge treatment preparation based on coconut shell material and a preparation method thereof. Background Art

[0002] Petroleum is known as the blood of industry and is a pillar industry of the country's lifeline. With the rapid development of many fields of the chemical industry, at this stage (and even for a long time in the future), it is still impossible to completely get rid of dependence on petroleum resources, and the amount of use is still showing a rapid upward trend. Petroleum sludge (PS) is a solid emulsion of oil-containing waste in the process of oil industry mining and processing. PS has been with it since the exploration and mining of crude oil. In the subsequent transportation, storage, refining, processing and other processes, PS is inevitably produced repeatedly. PS usually contains a large amount of crude oil, asphaltene, paraffin oil, and colloid. The general composition (mass percentage) is: 28-33% aromatics, 40-55% alkanes, 8-12% asphaltene and 10-22.4% resin. In addition, it also contains toxic and harmful substances such as benzene, phenols, anthracene, and pyrene. If PS is not handled in time and leaks, it will cause serious pollution to the soil, atmosphere, waters, etc., and then harm the living environment.

[0003] At present, PS can be divided into three categories: 1) When the oil content has recycling value, various recycling technologies and processes are used for recovery; 2) When it contains a small amount of oil, it is recycled by anaerobic recovery of combustible gases, incineration power generation and other means; 3) The residues after recycling and the mud contaminated into the soil, that is, PS with no recycling value, are mostly treated by biological methods.

[0004] For PS that has no recycling value, solidification and biological treatment methods are often used. Solidification requires a large area of ​​land, and once harmful substances in the soil are leached, they will cause secondary pollution, so this technology is gradually being eliminated. Biological treatment methods have been widely used at home and abroad due to their low cost, high treatment efficiency, and strong controllability. Traditional methods include: land cultivation, composting, and the newly emerging bioreactor method. The following is a brief description of the principles, operations, advantages and disadvantages of various methods:

[0005] Land cultivation method: Land cultivation method is to spread the oily sludge on the ground or mix it with soil and till it, and use soil microorganisms to degrade the organic components in the oily sludge. It is an enhanced remediation technology. The land cultivation method is simple to operate and low in cost, but the cycle is long. It usually takes 3 to 5 years to completely decompose the organic matter in the oily sludge. It has great regional selectivity and is especially not suitable for areas with long winters. Due to the long treatment cycle (about 3 to 5 years on average), low treatment efficiency, large area, and susceptibility to environmental factors, the farming method has gradually been replaced by composting.

[0006] Composting method: The composting method is to mix the oil sludge with added bacterial agents, bulking materials and nutrients, and use the microorganisms to decompose the hydrocarbon compounds in the oily sludge. Compared with the land cultivation method, the composting treatment adds additives and nutrients, accelerates the metabolic activity of microorganisms, decomposes organic matter faster, and reduces the residual pollutants to the maximum extent after treatment. It can also treat PS with relatively high petroleum hydrocarbon content and complex phases. The ideal products are carbon dioxide, water and fatty acids. However, there is a large area and is greatly affected by natural conditions such as rainfall and temperature. The life activities of microorganisms directly affect the quality and efficiency of composting treatment. At the same time, the type and quantity of bacterial agents, the dosage and degradation time of nutrients and fillers will affect the composting efficiency. After composting treatment, PS can be used as industrial landfill soil or agricultural backfill soil. The composting method has a good treatment effect on petroleum sludge of different types, and is suitable for northern regions with large wastelands and long winters, but the treatment cycle is also very long, calculated in years.

[0007] Bioreactor method: The bioreactor method refers to adding a solid-liquid mixed bioreactor to the biodegradation process to degrade PS in petroleum refineries. The purpose of diluting PS is achieved by mixing a nutrient solution and PS and configuring them into a muddy state. Under certain conditions, the mixture of the two is reacted in a container. In order to increase the biodegradation rate of hydrocarbon pollutants, domesticated high-efficiency hydrocarbon oxidizing bacteria are usually added to the bioreactor. The advantage of using the bioreactor method to treat PS is that experimental operating conditions such as nutrient addition, temperature, and oxygenation can be artificially controlled, so the degradation rate of petroleum hydrocarbon pollutants is faster than other biological treatment methods. However, this method has a small processing capacity, complex engineering, and high processing costs.

[0008] Therefore, it is very necessary to disclose a petroleum sludge treatment preparation with large treatment capacity, short cycle, low treatment cost and good effect. Summary of the invention

[0009] In view of this, the present invention provides a multi-component petroleum sludge treatment preparation based on coconut shell material and a preparation method thereof, so as to solve the problems of existing petroleum sludge treatment methods, such as long treatment cycle, large floor space, low treatment efficiency, small treatment volume, complex engineering, and high treatment cost.

[0010] In order to achieve the above object, the present invention adopts the following technical solution:

[0011] A method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material comprises the following steps:

[0012] 1) mixing 1 to 8 parts of a coconut shell mixture, 1 to 2 parts of a chitosan-containing powder, 1 to 2 parts of coconut milk, 1 to 3 parts of natural water sediment sludge, 1 to 10 parts of waste plant crushed particles, 10 to 20 parts of water, and 1 to 10 parts of petroleum sludge to obtain a mixed paste;

[0013] 2) The mixed paste is cultured, and when the surface of the mixed paste is covered with mycelium, it is filtered, and the filtrate is collected to obtain a multi-component petroleum sludge treatment preparation based on coconut shell material.

[0014] Preferably, the coconut shell mixture comprises one or more of coconut palm sawdust, coconut kernel crushed material, and dried and crushed coconut flakes; and the particle size of the coconut shell mixture is 1 μm to 20 cm.

[0015] Preferably, the chitosan-containing powder comprises one or more of shrimp shell powder, crab shell powder, and seaweed powder; and the particle size of the chitosan-containing powder is 0.1 nm to 10 cm.

[0016] Preferably, the natural water body sediment sludge includes seaside sludge and / or riverside sludge.

[0017] Preferably, the waste plant pulverized particles include one or more of almond powder, walnut shell powder and palm kernel shell powder; and the particle size of the waste plant pulverized particles is 0.1 nm to 10 cm.

[0018] Preferably, the culture temperature in step 2) is 26-36° C., and the culture method is shaking culture on a shaker.

[0019] Another object of the present invention is to provide a multi-component petroleum sludge treatment preparation based on coconut shell material prepared by the preparation method.

[0020] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The petroleum sludge treatment preparation disclosed in the present invention has the advantage of short treatment time, about 20 to 30 days (some PS contain more asphaltene, etc., W / O / W is complex, and the treatment time is slightly increased). After treatment, a fluffy type is obtained, hydrocarbon compounds are removed, and the solid soil state before pollution is restored, which greatly improves the treatment efficiency. In terms of treatment time, it is better than other similar treatment methods that have been reported so far.

[0022] 2. The petroleum sludge treatment preparation disclosed in the present invention does not contain any chemical reagents and additives, and all of them are natural components, which are naturally abundant and renewable waste resources. The raw materials are abundant, easy to obtain, cheap, safe, and can avoid secondary environmental pollution.

[0023] 3. The coconut shell mixture, chitosan powder, natural water sediment sludge, discarded plant crushed particles, petroleum sludge, etc. added in the present invention, after fermentation, show that the liquid contains more than 30 kinds of microorganisms that degrade petroleum hydrocarbon compounds, including branches under the Actinobacteria: Thermoleophilia and Acidimicrobiia, containing Brevibacterium, Pseudomonas, Pseudomonas, Micrococcus and a large number of NY3 oleophilic bacteria, which have extremely strong reproduction and mutation capabilities, high adaptability to PS in different regions, and can quickly produce new suitable strains according to the characteristics of the PS to be treated, maintaining the effect of efficient decomposition of hydrocarbon compounds.

[0024] 4. The petroleum sludge treatment preparation prepared by the present invention is simple to use and flexible in site operation. A pit is dug near an oil production site or an oil refinery, and a leak-proof isolation layer (such as a plastic film bottom burial) is prepared. After injecting PS, an appropriate amount of the petroleum sludge treatment preparation is added, and the treatment is sealed in situ. The ground mud can also be mixed with the preparation in a PS composting / biological treatment plant. The scope of application ranges from low-end manual operation to high-end bioreactors. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 is the TG-DSC spectrum of uncontaminated soil;

[0027] Figure 2 TG-DSC spectrum of PS in Experimental Example 1;

[0028] Figure 3 This is the TG-DSC spectrum of PS in Experimental Example 1 after 14 days of treatment;

[0029] Figure 4 This is the TG-DSC spectrum of PS in Experimental Example 1 after 21 days of treatment;

[0030] Figure 5 This is the TG-DSC spectrum of PS in Experimental Example 2 after 14 days of treatment;

[0031] Figure 6 This is the TG-DSC spectrum of PS in Experimental Example 2 after 21 days of treatment. DETAILED DESCRIPTION

[0032] The present invention provides a method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material, comprising the following steps:

[0033] 1) mixing 1 to 8 parts of a coconut shell mixture, 1 to 2 parts of a chitosan-containing powder, 1 to 2 parts of coconut milk, 1 to 3 parts of natural water sediment sludge, 1 to 10 parts of waste plant crushed particles, 10 to 20 parts of water, and 1 to 10 parts of petroleum sludge to obtain a mixed paste;

[0034] 2) The mixed paste is cultured, and when the surface of the mixed paste is covered with mycelium, it is filtered, and the filtrate is collected to obtain a multi-component petroleum sludge treatment preparation based on coconut shell material.

[0035] In the present invention, under the above ratio, the number of coconut shell mixtures added can be 2 parts, 4 parts, 5 parts, and 6 parts; the number of chitosan powders added can be 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, and 1.8 parts; the number of coconut juices added can be 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, and 1.8 parts; the number of natural water sediment sludge added can be 1.2 parts, 1.5 parts, 1.8 parts, 2 parts, 2.2 parts, 2.5 parts, and 2.8 parts; the number of waste plant crushed particles added can be 2 parts, 4 parts, 5 parts, 6 parts, and 8 parts; the number of water added can be 12 parts, 14 parts, 15 parts, 16 parts, and 18 parts; the number of petroleum sludge added can be 2 parts, 4 parts, 5 parts, 6 parts, and 8 parts.

[0036] In the present invention, the coconut shell mixture comprises one or more of coconut palm sawdust, coconut kernel crushed material, and dried coconut flakes crushed material; the particle size of the coconut shell mixture is 1 μm to 20 cm, specifically 10 μm, 100 μm, 200 μm, 500 μm, 1 mm, 10 mm, 100 mm, 500 mm, 1 cm, 10 cm.

[0037] In the present invention, the chitosan powder comprises one or more of shrimp shell powder, crab shell powder, and seaweed powder; the particle size of the chitosan powder is 0.1nm to 10cm, specifically 1nm, 10nm, 100nm, 1μm, 10μm, 100μm, 1mm, 10mm, 100mm, 1cm, 5cm.

[0038] In the present invention, the natural water body sediment sludge includes seaside sludge and / or riverside sludge.

[0039] In the present invention, the waste plant crushed particles include one or more of almond powder, walnut shell powder and palm kernel shell powder; the particle size of the waste plant crushed particles is 0.1nm~10cm, specifically 1nm, 10nm, 100nm, 1μm, 10μm, 100μm, 1mm, 10mm, 100mm, 1cm, 5cm.

[0040] In the present invention, the water is preferably water from a river estuary, which can accelerate the growth of bacteria in the system. Treating sludge in an infiltrated state allows the cultured bacteria to fully contact the sludge, thereby improving efficiency.

[0041] In the present invention, the added petroleum sludge does not need to be guaranteed to be the same as the petroleum sludge to be treated.

[0042] In the present invention, the culture temperature in step 2) is 26-36°C, specifically 28°C, 30°C, 32°C, 34°C, 35°C; the culture method is shaking culture on a shaking table.

[0043] In the present invention, if water is consumed, it is preferred to replenish water.

[0044] Another object of the present invention is to provide a multi-component petroleum sludge treatment preparation based on coconut shell material prepared by the preparation method.

[0045] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1

[0047] Weigh 4g of dry coconut palm sawdust with a particle size of 100μm to 1cm / 1g of coconut kernel crushed material / 2g of dried coconut shredded crushed material, weigh 2g of crab shell powder with a particle size of 100nm to 1μm, 2g of coconut juice, 2g of seashore sludge (paste), 2.5g of almond powder (particle size of 100nm to 1cm), and 2.5g of petroleum sludge from the isolated island petroleum sludge treatment plant in Dongying, Shandong, and add them together into a container. Then inject 20g of water from the river estuary in batches (added in 3 times on average), adjust it into a thin paste, wrap the bottle stopper with strip filter paper and cover it. Cultivate it in a shaking table at 28°C, pay attention to observation during the period, add water at any time, and place it for about 1 week. When the surface is covered with mycelium, the mycelium is lush, filter it, and obtain the filtrate, which is a multi-component petroleum sludge treatment preparation.

[0048] Example 2

[0049] Weigh 4g of dry coconut palm sawdust with a particle size of 100μm to 100mm / 1.5g of coconut kernel crushed material / 2g of dried coconut flakes crushed material, weigh 1g of dried Sargassum crushed material with a particle size of 10μm to 100mm, 1.5mL of coconut juice, 2g of river sludge (paste), 5g of palm kernel shell powder (particle size of 10μm to 100mm), and 2.5g of petroleum sludge, and add them together in a container. Then inject 20g of water taken from the estuary of the river in batches (added in 3 times on average), adjust it into a thin paste, wrap the bottle stopper with strip filter paper and cover it. Cultivate in a shaking table at 30℃, pay attention to observation during the period, add water at any time, and place it for about 1 week. When the surface is covered with mycelium, the mycelium is lush, filter it, and obtain the filtrate, which is a multi-component petroleum sludge treatment preparation.

[0050] Example 3

[0051] Weigh 3g of dry coconut palm sawdust with a particle size of 1mm to 20cm / 2g of coconut kernel crushed material / 2g of dried coconut flakes crushed material, weigh 1g of crab shell powder with a particle size of 1mm to 10cm, 1g of coconut juice, 1.5g of seashore sludge (paste), 8g of palm kernel shell powder (particle size of 1mm to 10cm), and 6g of petroleum sludge, and add them together into a container. Then inject 15g of water from the river estuary in batches (added in 3 times on average), adjust it into a thin paste, wrap the bottle stopper with strip filter paper and cover it. Cultivate it in a shaker at 26℃, pay attention to observation during the period, add water at any time, and leave it for about 1 week. When the surface is covered with mycelium, the mycelium is lush, filter it, and obtain the filtrate, which is a multi-component petroleum sludge treatment preparation.

[0052] Example 4

[0053] Weigh 4g of dry coconut palm sawdust with a particle size of 1mm to 10cm / 2g of coconut kernel crushed material / 1g of dried coconut shredded crushed material, weigh 2g of crab shell powder with a particle size of 10nm to 100μm, 1.5g of coconut juice, 3g of seaside sludge (paste), 5g of walnut shell powder (particle size of 10nm to 100μm), and 8g of petroleum sludge, and add them together in a container. Then inject 10g of water from the river estuary in batches (added in 3 times on average), adjust it into a thin paste, wrap the bottle stopper with strip filter paper and cover it. Cultivate in a shaking table at 36℃, pay attention to observation during the period, add water at any time, and place it for about 1 week. When the surface is covered with mycelium, the mycelium is lush, filter it, and obtain the filtrate, which is a multi-component petroleum sludge treatment preparation.

[0054] Experimental Example 1

[0055] A ground pool of 3×1×0.3 meters in length×width×height was dug on the ground (lined with plastic film to prevent leakage into the groundwater system), and PS was added in 5 layers to fill the ground pool. The multi-component petroleum sludge treatment preparation prepared in Example 1 was added on each layer of PS (1000 g was added in five times), and the distribution was as uniform as possible, and the film was sealed. It was noted that water was added at any time to keep the system in a completely infiltrated state, and maintained for three weeks. When the PS (combustible component) was less than 8% when sampled, the degradation treatment was completed, and the sludge in the soil was harmless.

[0056] The TG-DSC spectrum of uncontaminated soil is as follows: Figure 1 As shown, the TG-DSC spectrum of PS in Experimental Example 1 is as follows Figure 2 As shown, the TG-DSC spectrum of PS after 14 days of treatment is as follows Figure 3 As shown, the TG-DSC spectrum of PS after 21 days of treatment is as follows Figure 4 As shown. Figure 1 It can be seen that the total weight loss rate of the uncontaminated soil in the heating range of 30-560℃ is 10%, of which the water loss rate before 110℃ is 6%, which is used as the control sample; Figure 2 The total weight loss of the sample in the heating range of 30-560℃ is 30%. Due to the oil content on the surface, there is no obvious water loss before 110℃. From DSC, it can be seen that the sample begins to have an exothermic peak at 250℃ and the exotherm is completed at 500℃; Figure 3 The total weight loss of the sample in the heating range of 30-560℃ is 15%. From DSC, it can be seen that the sample begins to have double exothermic peaks at 250℃ and the exothermic peaks are completed at 560℃. After 14 days, the oil content has been greatly reduced; Figure 4 The total weight loss rate of the sample in the heating range of 30-560℃ is 6.4%. From DSC, it can be seen that the sample begins to have two exothermic peaks at 250℃ and the exothermic peaks are completed at 560℃. After 21 days, the oil content is already trace (about 1-3%, because the weight loss rate of uncontaminated soil itself is 4-6%). Figures 1 to 4 It can be concluded that the petroleum sludge treating agent of the present invention is very effective. When used on a large scale, the treating agent and PS are added in layers and sufficient water is added to achieve a better treating effect.

[0057] Experimental Example 2

[0058] At the desert oil production site, according to local conditions, choose a low-lying area (deep pits should be dug in the desert), use a degradable plastic film as the base, spread the petroleum sludge on it, and then add the multi-component petroleum sludge treatment preparation prepared in Example 2 (the ratio of petroleum sludge to multi-component petroleum sludge treatment preparation is 20:1). Then wrap it with the excess film corners, cover it with a 25cm uncontaminated soil layer, and no longer manage it except for sampling. After the plastic film is completely decomposed in half a year to a year, the area can be used as fertile soil and applied locally.

[0059] The TG-DSC spectrum of PS when sampled and analyzed after 14 days of treatment in Experimental Example 2 is as follows: Figure 5 As shown, the TG-DSC spectrum of PS after 21 days of treatment is as follows Figure 6 As shown, Figure 5 It can be seen that the total weight loss rate of the sample in the heating range of 30-560℃ is 16%. From DSC, it can be seen that the sample begins to have double exothermic peaks at 250℃ and the exothermic peaks are completed at 560℃. After 14 days, the oil content has been greatly reduced; Figure 6 It can be seen that the total weight loss rate of the sample in the heating range of 30-560℃ is 7.8%. From DSC, it can be seen that the sample begins to have two exothermic peaks at 250℃ and the exothermic peaks are completed at 560℃. After 21 days, the oil content is already trace (about 1-3%, because the weight loss rate of uncontaminated soil itself is 4-6%). Figure 5 , Figure 6 It can be seen that the effect is still very good when used on a large scale.

[0060] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material, characterized in that: The steps include: 1) mixing 1 to 8 parts of a coconut shell mixture, 1 to 2 parts of a chitosan-containing powder, 1 to 2 parts of coconut milk, 1 to 3 parts of natural water sediment sludge, 1 to 10 parts of waste plant crushed particles, 10 to 20 parts of water, and 1 to 10 parts of petroleum sludge to obtain a mixed paste; 2) Cultivating the mixed paste, filtering when the surface of the mixed paste is covered with mycelium, and collecting the filtrate to obtain a multi-component petroleum sludge treatment preparation based on coconut shell material.

2. The method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material according to claim 1, characterized in that: The coconut shell mixture comprises one or more of coconut palm sawdust, crushed coconut kernel, and dried and crushed coconut flakes; and the particle size of the coconut shell mixture is 1 μm to 20 cm.

3. The method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material according to claim 2, characterized in that: The chitosan powder comprises one or more of shrimp shell powder, crab shell powder and seaweed powder; the particle size of the chitosan powder is 0.1nm-10cm.

4. The method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material according to claim 2 or 3, characterized in that: The natural water body sediment sludge includes seaside sludge and / or riverside sludge.

5. The method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material according to claim 4, characterized in that: The waste plant crushed particles include one or more of almond powder, walnut shell powder and palm kernel shell powder; the particle size of the waste plant crushed particles is 0.1nm-10cm.

6. The method for preparing a multi-component petroleum sludge treatment preparation based on coconut shell material according to claim 5, characterized in that: The culture temperature in step 2) is 26-36° C., and the culture method is shaking culture on a shaking table.

7. A multi-component petroleum sludge treatment preparation based on coconut shell material prepared by the preparation method according to any one of claims 1 to 6.

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