A sludge dehydrating agent

Abstract

This invention relates to the field of oil sludge dewatering, and more particularly to an oil sludge dewatering agent. It addresses the technical problem that existing solidification dewatering agent formulations have room for improvement in terms of proportions, and that there are no corresponding formulations for different oil sludge components and moisture contents. The dewatering agent comprises: cement, calcium oxide, ferric oxide, gypsum, and kaolin. The components and their mass ratios are: cement 20-30%, calcium oxide 20-30%, ferric oxide 5-15%, gypsum 3-10%, kaolin 25-40%, demulsifier 2-3%, and coagulant 2-3%. Different proportions are selected within a range based on the different moisture contents of the oil sludge. Due to chemical reactions, the colloidal structure in the oil sludge crystallizes and grows, and some adsorbed water is converted into crystalline water. After the scum bottom mud forms a crystalline structure, part of its water crystallizes, and the other part rapidly evaporates, achieving stabilization of the scum bottom mud. The oily components are evenly distributed and solidified in the molecules through mixing, and then transported to the boiler for combustion.

Description

Technical Field

[0001] This invention relates to the field of sludge dehydration, and more particularly to a sludge dehydrating agent. Background Technology

[0002] Oil sludge solidification and dehydration agents are chemicals specifically designed to treat oily sludge. Their main function is to alter the physical and chemical properties of the sludge through chemical reactions, thereby achieving solidification and dehydration. This technology typically involves multiple steps, including pretreatment, chemical conditioning, dehydration, and solidification. Pretreatment may include mechanical stirring, heating, and pH adjustment to improve the treatability of the sludge. Chemical conditioning involves adding chemical reagents, such as flocculants and dehydrating agents, to promote solid-liquid separation within the sludge. The dehydration step aims to remove water from the sludge, while the solidification step stabilizes the treated sludge to prevent further decomposition and environmental pollution.

[0003] The existing curing and dehydrating agent formulations still have room for improvement in terms of proportions, and there are no corresponding formulations for different components and moisture contents of oil sludge. This invention solves the above problems. Summary of the Invention

[0004] In order to solve the technical problem that the existing curing and dehydrating agent formulations still have room for improvement in terms of proportion, and that there are no corresponding formulations for different components and moisture contents of oil sludge, this invention provides an oil sludge dehydrating agent.

[0005] A sludge dewatering agent comprises: cement, calcium oxide, ferric oxide, gypsum, and kaolin. The components and their mass ratios are as follows: cement 20-30%, calcium oxide 20-30%, ferric oxide 5-15%, gypsum 3-10%, kaolin 25-40%, demulsifier 2-3%, and coagulant 2-3%.

[0006] Furthermore, the components and their mass ratios of the dehydrating agent are as follows: cement 30%, calcium oxide 20%, ferric oxide 5%, gypsum 3%, kaolin 37%, demulsifier 3%, and coagulant 2%.

[0007] Furthermore, the components and their mass ratios of the dehydrating agent are as follows: 30% cement, 20% calcium oxide, 10% ferric oxide, 10% gypsum, 25% kaolin, 3% demulsifier, and 2% coagulant.

[0008] Furthermore, the components and their mass ratios of the dehydrating agent are as follows: cement 20%, calcium oxide 25%, ferric oxide 15%, gypsum 10%, kaolin 25%, demulsifier 2%, and coagulant 3%.

[0009] Furthermore, the demulsifier is selected as a solid powder decolorizing demulsifier, including one or more of activated carbon, wood ash, zinc chloride, copper chloride, and bentonite.

[0010] Furthermore, the coagulant is selected from inorganic coagulant particles, including one or more of aluminum sulfate, ferric sulfate, ferrous sulfate, potassium aluminum sulfate, and sodium aluminate.

[0011] Beneficial effects of this invention:

[0012] Different proportions are selected within the range according to the different water content of the oil sludge. Due to chemical reaction, the colloidal structure in the oil sludge forms crystals and grows. Some of the adsorbed water is converted into crystalline water. After the scum bottom mud forms a crystalline structure, part of its water crystallizes and the other part evaporates rapidly to achieve the stabilization of the scum bottom mud. Its oil components are mixed to make them evenly distributed and solidified in the molecules, and then transported to the boiler for combustion.

[0013] Solid powder demulsifiers and coagulants can be uniformly incorporated into the sludge and dissolved during the mixing process, and they also have better fluidity in drier sludge compared to liquids. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0015] The following describes an oil sludge dewatering agent of this embodiment. The components and their mass ratios of the dewatering agent are as follows: cement 30%, calcium oxide 20%, ferric oxide 5%, gypsum 3%, kaolin 37%, demulsifier 3%, and coagulant 2%.

[0016] When the water content of the sludge is greater than 70%, use it according to the following steps:

[0017] The oil sludge is pumped into a mixing mixer using a metering pump, and at the same time, the components of the demulsifier, coagulant, and oil sludge dehydrator are added and mixed with the oil sludge in a 3:15 ratio for the first time.

[0018] After the initial mixing, the mixture is discharged into the secondary mixing mixer. Wood ash and zinc chloride powder are added as demulsifiers, and potassium aluminum sulfate powder is added as coagulant for secondary mixing.

[0019] The slurry is pumped to the curing site and cured for 1-3 days. The water content of the modified scum bottom mud crystallizes and evaporates rapidly, reducing the water content to below 40%.

[0020] Its oil components are mixed to make them evenly distributed, solidified in the molecules, and transported to the boiler for combustion. Example

[0021] The following describes an oil sludge dewatering agent of this embodiment. The components and their mass ratios of the dewatering agent are as follows: cement 30%, calcium oxide 20%, ferric oxide 10%, gypsum 10%, kaolin 25%, demulsifier 3%, and coagulant 2%.

[0022] When the water content of the sludge is less than 70% but greater than 60%, use it according to the following steps:

[0023] The oil sludge is pumped into a mixing mixer using a metering pump, and at the same time, the components of the demulsifier, coagulant, and oil sludge dehydrator are added and mixed with the oil sludge in a 3:17 ratio for the first time.

[0024] In the initial mixing process, copper chloride and bentonite powder are added as demulsifiers, and ferrous sulfate powder is added as coagulant. The mixture is then mixed in the secondary mixing unit.

[0025] The slurry is pumped to the curing site and cured for 1-3 days. The water content of the modified scum bottom mud crystallizes and evaporates rapidly, reducing the water content to below 40%.

[0026] Its oil components are mixed to make them evenly distributed, solidified in the molecules, and transported to the boiler for combustion. Example

[0027] The following describes an oil sludge dewatering agent of this embodiment. The components and their mass ratios of the dewatering agent are as follows: cement 20%, calcium oxide 25%, ferric oxide 15%, gypsum 10%, kaolin 25%, demulsifier 2%, and coagulant 3%.

[0028] When the water content of the sludge is less than 60% but greater than 50%, use it according to the following steps:

[0029] The oil sludge is pumped into a mixing mixer using a metering pump, and at the same time, the components of the demulsifier, coagulant, and oil sludge dehydrator are added and mixed with the oil sludge in a 3:20 ratio for the first time.

[0030] After the initial mixing, the mixture is discharged into the secondary mixing mixer. Wood ash and zinc chloride powder are added as demulsifiers, and aluminum sulfate powder is added as coagulant for secondary mixing.

[0031] The slurry is pumped to the curing site and cured for 1-3 days. The water content of the modified scum bottom mud crystallizes and evaporates rapidly, reducing the water content to below 40%.

[0032] Its oil components are mixed to make them evenly distributed, solidified in the molecules, and transported to the boiler for combustion.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil sludge dewatering agent comprising: Cement, calcium oxide, ferric oxide, gypsum, kaolin, Its characterized in that: the dehydrating agent each component and its mass ratio are: cement 20-30%, calcium oxide 20-30%, ferric oxide 5-15%, gypsum 3-10%, kaolin 25-40%, demulsifier 2-3%, coagulant 2-3%, the demulsifier selects the solid powder decoloring demulsifier powder, including: activated carbon, wood ash, zinc chloride, copper chloride, bentonite one or several, the coagulant selects inorganic coagulant particle, including aluminum sulfate, ferric sulfate, ferrous sulfate, potassium aluminum sulfate, sodium aluminate one or several.

2. An oil sludge dehydrator according to claim 1, characterized in that: The dehydrating agent each component and its mass ratio are: cement 30%, calcium oxide 20%, ferric oxide 5%, gypsum 3%, kaolin 37%, demulsifier 3%, coagulant 2%.

3. The oil sludge dehydrator according to claim 1, characterized in that: The dehydrating agent each component and its mass ratio are: cement 30%, calcium oxide 20%, ferric oxide 10%, gypsum 10%, kaolin 25%, demulsifier 3%, coagulant 2%.

4. The oil sludge dehydrator according to claim 1, wherein: The dehydrating agent each component and its mass ratio are: cement 20%, calcium oxide 25%, ferric oxide 15%, gypsum 10%, kaolin 25%, demulsifier 2%, coagulant 3%.