Oil-containing sludge treatment method and product based on sludge solidification

Abstract

The present invention discloses an oily sludge treatment method and product based on sludge solidification. The treatment method includes: mixing the ground terpene-containing substances with active calcium to serve as a cell wall breaker; mixing the cell wall breaker with carbon-based substances serving as adsorbents to obtain a treatment ingredient; and mixing the treatment ingredient with oily sludge to obtain a powdery oily sludge treatment product. The present invention can solidify oily sludge into fuel, achieving efficient utilization of the stabilization, rapidity, harmlessness, and resourcefulness of oily sludge.

Description

Technical Field

[0001] The present invention relates to the technical field of oily sludge treatment methods. Background Art

[0002] Oily sludge is mainly composed of crude oil, moisture, chemical additives and biological organic matter. It has complex components, high viscosity and poor fluidity. It is a plastic-like sac with many toxic and harmful components and obvious heat wave properties. If it cannot be treated in the short term, it will cause long-term damage to the surrounding environment. On the other hand, the oil content of oily sludge is generally about 10%, and can reach 30% at a high level. It has the utilization value of clay mineral recycling and energy substance recovery. Therefore, if the oily sludge can be harmlessly treated and the recyclable components in it can be recycled, it can bring obvious economic and environmental benefits.

[0003] However, the existing oily sludge treatment methods are usually difficult, with complex processes and low recovery efficiency, and need to be further improved. For example, the oil sludge incineration technology in the prior art uses the technical means of incinerating the conditioned, dehydrated and dried sludge cake to remove the pollutants in the oil sludge. It has a wide range of applicability, but it is necessary to control the temperature above 55°C, and after a certain period of sedimentation and stirring work, then carry out layered water cutting treatment. It is also necessary to strictly control the incineration cycle and carry out resource treatment on the remaining ash slag. The process conditions are harsh, the process is complex, the investment cost is high, and during the incineration process, pollutants such as carbon monoxide will also be generated; or such as the conditioning-mechanical separation technology, its treatment process is to dilute and heat the oil sludge, and at the same time add chemical agents for conditioning, and then through mechanical separation equipment, the oil is desorbed or aggregated and separated from the solid phase surface. This method can realize the recovery and utilization of most of the crude oil, and is mainly applicable to sludges with a relatively high oil content. However, its process is complex, the treatment effect is poor, and the economic benefit is relatively low; or such as the biodegradation technology, its treatment process is to use the way of composting and cultivating land, and use the metabolism of microorganisms to degrade the petroleum resources in the oil sludge, and finally convert them into water and carbon dioxide. This method has good treatment effect and low overall investment, but the treatment cycle of this process is long, the utilization rate of the plant site is low, and the economic benefit is low; or such as the chemical oxidation technology, which is to spray or inject chemical oxidants into the oil sludge to make them react chemically with the pollutants to achieve the purpose of purifying the oil sludge. This method has low overall investment and short treatment cycle, but high operation consumption, poor treatment effect, and relatively low economic benefit. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to propose a new oily sludge treatment method, which adds a wall-breaking agent and an adsorbent to the oily sludge, and through the biological reduction method, the oily sludge is solidified into fuel, so as to achieve the efficient utilization of the stabilization, rapidization, harmlessness and resource of the oily sludge.

[0005] The technical solution of the present invention is as follows:

[0006] An oily sludge treatment method based on sludge solidification, which comprises the following steps:

[0007] Grind the dried terpene-containing substances to obtain ground terpene-containing substances, and mix them with active calcium to obtain a wall-breaking agent;

[0008] Grind the carbon-based substances to serve as an adsorbent;

[0009] Mix the wall-breaking agent and the adsorbent to obtain a treatment ingredient;

[0010] Mix the treatment ingredient with the oily sludge to obtain a powdery oily sludge treatment product.

[0011] In the above treatment method of the present invention, the wall-breaking agent can quickly break the cystic structure of the oily sludge and further solidify it into a fuel-type treatment product. The addition of the carbon-based substance can increase the calorific value of the obtained product. Generally, the higher the calorific value of the added carbon-based substance, the higher the calorific value of the obtained product.

[0012] In some preferred embodiments, the treatment ingredient is mixed with the oily sludge within two hours after being prepared.

[0013] In some preferred embodiments, the mixing of the treatment ingredient with the oily sludge can be achieved by mixing and kneading or turning over with a turning machine.

[0014] In some preferred embodiments, the terpene-containing substances are selected from Platycladus orientalis branches and leaves and / or Sabina vulgaris branches and leaves.

[0015] In some preferred embodiments, the carbon-based substances are selected from coal and / or peat.

[0016] In some preferred embodiments, in step (1), the dried terpene-containing substances are ground to 55-65 meshes to obtain the ground terpene-containing substances.

[0017] In some preferred embodiments, in step (2), the dried terpene-containing substances are ground to 40-60 meshes.

[0018] In some preferred embodiments, the mass ratio of the ground terpene-containing substances to active calcium is (0.5-2):(8-9.5), and the mass ratio of the wall-breaking agent to the adsorbent is (0.5-3):(7-9.5).

[0019] More preferably, the mass ratio of the ground terpene-containing substances to active calcium is 1:9, and the mass ratio of the wall-breaking agent to the adsorbent is 1:9.

[0020] In some preferred embodiments, the mass ratio of the treatment ingredients to the oily sludge is 1:1.

[0021] In some preferred embodiments, the particle size of the oily sludge treatment product is 20 - 40 mesh.

[0022] The present invention further provides an oily sludge treatment product prepared according to the above-mentioned oily sludge treatment method, and this product can be directly used as a fuel.

[0023] The present invention has the following beneficial effects:

[0024] The treatment method of the present invention has a simple process, mild conditions, and wide applicability;

[0025] The present invention has a short treatment time for oily sludge and high efficiency, and can effectively solve the problem of insufficient current oily sludge treatment capacity;

[0026] The treatment method of the present invention can quickly produce fuel products, reduce environmental pressure, and meet the requirements of green development and ecological development;

[0027] The product obtained by the present invention can be directly used as an alternative energy source for fossil fuels. It not only has low production costs, a simple process, and high economic benefits, but also can effectively solve the problem of fuel shortage;

[0028] The present invention can effectively solve the problems of low utilization rate of current oily sludge, complex treatment process, and high operating costs, realizing the efficient resource utilization of oily sludge, and having good ecological and economic benefits. Specific Embodiments

[0029] The following describes the present invention in detail with reference to embodiments. However, it should be understood that the embodiments are only used for exemplary description of the present invention and do not constitute any limitation to the protection scope of the present invention. All reasonable transformations and combinations within the scope of the inventive concept of the present invention fall within the protection scope of the present invention.

[0030] Example 1

[0031] The oily sludge is treated through the following process:

[0032] (1) The branches and leaves of Sabina vulgaris are sun-dried or dried, ground to 60 mesh with a pulverizer, and then uniformly mixed with active calcium at mass ratios of 0.5:9.5, 1:9, and 2:8 respectively to obtain three groups of wall-breaking agents a, b, and c;

[0033] (2) The peat is ground to 40 - 60 mesh with a pulverizer and used as an adsorbent;

[0034] (3) Mix the cell wall breaker and the adsorbent with the oily sludge at a mass ratio of 1:9 and a mixing mass ratio of 1:1, and record the time for forming the powdery material, as shown in the following table:

[0035] Table 1 Time for forming powdery material with cell wall breakers of different ratios

[0036]

[0037]

[0038] It can be seen from Table 1 that when the Sabina vulgaris leaves and active calcium are mixed at a mass ratio of 1:9 to make the cell wall breaker, the time for treating the oily sludge to form the powdery material is the shortest.

[0039] Example 2

[0040] Treat the oily sludge through the following process:

[0041] (1) Dry or sun-dry the branches and leaves of Sabina vulgaris, grind them to 60 meshes with a pulverizer, and then mix them evenly with active calcium at a mass ratio of 1:9 to obtain the cell wall breaker;

[0042] (2) Grind the peat to 40 - 60 meshes with a pulverizer as the adsorbent;

[0043] (3) Mix the cell wall breaker and the adsorbent at mass ratios of 0.5:9.5, 1:9, 2:8, 3:7, and 4:7 to obtain five groups of treatment ingredients A, B, C, D, and E;

[0044] (4) Mix the five groups of treatment ingredients A, B, C, D, and E with 5 portions of 100 g of oily sludge from the same oilfield at a mass ratio of 1:1 and knead them to make them solidify quickly. Record the time for obtaining the powdery material of about 40 meshes and test the calorific value of the obtained material. The results are shown in Table 2:

[0045] Table 2 Time for forming powdery material and calorific value with different ratios of treatment ingredients

[0046] Processing ingredients Time (min) to form powdery material Received basis lower calorific value (J / g) A 8.4 3258 B 6.3 3246 C 5.9 3012 D 6.2 2876 E -- (Unable to form powdery material) --

[0047] It can be seen from Table 2 that when the mass ratio of the cell wall breaker to the adsorbent is 2:8, the treatment time is the shortest, but the calorific value of the product is relatively low. When the mass ratio of the cell wall breaker to the adsorbent is 0.5:9.5 or 1:9 (i.e., treatment A and treatment B), the calorific value of the obtained material is the highest, but the time for treatment B to form the powdery material is relatively short. Considering the treatment time and the calorific value of the product comprehensively, the mass ratio of the cell wall breaker to the adsorbent of 1:9 is more optimal.

[0048] Example 3

[0049] Treat the oily sludge through the following process:

[0050] (1) Dry or bake the branches and leaves of Sabina vulgaris, grind them to 60 mesh with a powder mill, and then mix them evenly with active calcium in a mass ratio of 1:9 to obtain a cell wall-breaking agent.

[0051] (2) Grind peat to 40 - 60 mesh with a powder mill as an adsorbent.

[0052] (3) Mix the cell wall-breaking agent and the adsorbent evenly in a mass ratio of 1:9 to obtain a treatment ingredient.

[0053] (4) Take 100 g of oily sludge from Oilfield A as the sample to be treated 1, 100 g of oily sludge from Oilfield B as the sample to be treated 2, and 100 g of oily sludge from three locations in Oilfield C as the samples to be treated 3, 4, and 5. After testing, the water content of the five samples to be treated is about 15 - 25%, the oil content is about 30%, and the sediment content is about 1%.

[0054] (5) Weigh five portions of 100 g of the treatment ingredient, mix and treat them with five portions of the oily sludge to be treated respectively. Knead the two together to make them solidify quickly to obtain a powdery material of about 40 mesh.

[0055] Perform performance measurements on the obtained powdery material as shown in Table 3. Among them, the determination of total moisture adopts the determination method in GB / T 211 - 2007, the determination of sulfur adopts the determination method for various forms of sulfur in coal in GB / T 215 - 2008, the determination of calorific value adopts the determination method for the calorific value of coal in GB / T 213 - 2008, and the determination of ash composition adopts the determination method for coal ash composition analysis in GB / T 1574 - 2007. The test results are as follows:

[0056] Table 3 Performance test results of the product obtained in Example 1:

[0057]

[0058]

[0059] As can be seen from Table 3, the product prepared in this example has a calorific value of more than 3000 kcal and a low sulfur content, and can be directly used as fuel.

[0060] The above embodiments are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An oil-containing sludge treatment method based on sludge solidification, characterized in that, It includes the following steps: (1) Grind the dried terpene-containing substance to obtain the ground terpene-containing substance, and mix it with active calcium to obtain a wall-breaking agent; (2) Grind the carbon-based substance to serve as an adsorbent; (3) Mix the wall-breaking agent and the adsorbent to obtain a treatment ingredient; (4) Mix the treatment ingredient with oily sludge to obtain a powdery oily sludge treatment product; Wherein, the terpene-containing substance is selected from Platycladus orientalis branches and leaves and / or Sabina vulgaris branches and leaves; the carbon-based substance is selected from coal and / or peat; the mass ratio of the ground terpene-containing substance to active calcium is (0.5-2):(8-9.5), and the mass ratio of the wall-breaking agent to the adsorbent is (0.5-3):(7-9.5); the mass ratio of the treatment ingredient to the oily sludge is 1:

1.

2. The oil-containing sludge treatment method according to claim 1, wherein In step (1), grind the dried terpene-containing substance to 55-65 mesh to obtain the ground terpene-containing substance.

3. The oil-containing sludge treatment method according to claim 1, characterized in that, In step (2), grind the carbon-based substance to 40-60 mesh.

4. The oil-containing sludge treatment method according to claim 1, wherein The mass ratio of the ground terpene-containing substance to active calcium is 1:9, and the mass ratio of the wall-breaking agent to the adsorbent is 1:

9.

5. The oil-containing sludge treatment method according to claim 1, wherein The particle size of the oily sludge treatment product is 20-40 mesh.

6. An oily sludge treatment product prepared by the oily sludge treatment method according to any one of claims 1-5.

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