Anti-blocking system for diesel oil anti-wear agent production process

Abstract

The utility model belongs to the technical field of diesel oil anti-wear agent production, and particularly relates to an anti-blocking system for a diesel oil anti-wear agent production process, which comprises a first stirring kettle, a centrifugal machine, a second stirring kettle, a first centrifugal pump and a third stirring kettle which are connected in sequence, an outlet of the third stirring kettle is respectively connected with a second centrifugal pump and a third centrifugal pump through pipelines, and the second centrifugal pump and the third centrifugal pump are connected in parallel; a water outlet is formed in the top of the centrifugal pump, and the water outlet is conveyed to the first conveying pipe with the jacket heat tracing function, the second conveying pipe with the jacket heat tracing function and the third conveying pipe with the jacket heat tracing function through pipelines. A hot water phase (80-90 DEG C) generated after washing of the coarse anti-wear agent in the stirring kettle is used for heat tracing of a discharge pipeline of palmitic acid and sewage containing the palmitic acid, the pipeline is prevented from being blocked by solidification and precipitation of the palmitic acid, and the method can be suitable for continuous production of unsaturated fatty acid and unsaturated fatty acid ester type anti-wear agents.

Description

Technical Field

[0001] This utility model belongs to the field of diesel anti-wear agent production technology, specifically relating to an anti-blocking system for the diesel anti-wear agent production process. Background Technology

[0002] With increasingly stringent environmental requirements in the oil refining industry, the sulfur and nitrogen content in diesel fuel has been strictly controlled. This has led to a gradual decrease in the natural anti-wear components (sulfur and nitrogen compounds) in diesel products, resulting in a decline in their anti-wear performance. Currently, the method to improve the lubricity of low-sulfur, low-nitrogen diesel fuel is to add anti-wear agents.

[0003] Currently used diesel fuel anti-wear agents are mainly unsaturated fatty acid and unsaturated fatty acid ester type anti-wear agents. The production process of unsaturated fatty acid ester type anti-wear agents uses long-chain unsaturated fatty acids and polyols as raw materials. After esterification under the catalysis of inorganic acids, the products undergo washing, neutralization, and drying to obtain the final ester-based anti-wear agent. The production process of unsaturated acid type anti-wear agents uses oleic acid as raw material, and involves freeze centrifugation, washing, demulsification, and drying to obtain the final unsaturated acid type anti-wear agent product.

[0004] Existing technologies disclose diesel anti-wear agent production and post-treatment systems. For example, multiple discontinuous stirred tanks are used as alcohol washing and alkali washing devices, undergoing multiple impurity removal and refining processes to improve the quality of the anti-wear agent product. Alternatively, multiple water washing devices are connected in parallel to transform diesel anti-wear agent production into a semi-intermittent, semi-continuous process, improving production efficiency. All of these processes employ ordinary centrifugation and demulsification processes to achieve post-treatment of the anti-wear agent, but the composition of the post-treatment system varies significantly depending on the anti-wear agent, resulting in poor universality. Because the palmitic acid-water mixture from centrifugation is severely emulsified, it requires heating to demulsify. However, during the separation process after demulsification, some palmitic acid dissolves in the water. During water separation, as the temperature of the palmitic acid oil phase and the palmitic acid-containing aqueous phase gradually decreases in the pipeline, the palmitic acid gradually solidifies or precipitates, forming a solid phase that blocks the pipeline, causing the anti-wear agent unit to shut down and significantly reducing the company's production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an anti-clogging system for the production process of diesel anti-wear agents. The system uses the hot water phase (80-90℃) generated after the crude anti-wear agent is washed in the stirred tank to heat the discharge pipes of palmitic acid and palmitic acid-containing wastewater, preventing palmitic acid from solidifying and precipitating and clogging the pipes. It is applicable to the continuous production of anti-wear agents of unsaturated fatty acids and unsaturated fatty acid esters.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] An embodiment of this utility model provides an anti-clogging system for the production process of diesel anti-wear agent, comprising a first mixing tank, a centrifuge, a second mixing tank, a first centrifugal pump, and a third mixing tank connected in sequence, wherein the outlet of the third mixing tank is connected to the second centrifugal pump and the third centrifugal pump respectively through pipes, and the second centrifugal pump and the third centrifugal pump are connected in parallel.

[0008] The top of the first centrifugal pump is provided with an outlet, and the outlet is respectively transported to the first jacketed heat-traced conveying pipe, the second jacketed heat-traced conveying pipe and the third jacketed heat-traced conveying pipe through pipelines.

[0009] As a further technical solution, the centrifuge is provided with a palmitic acid-water emulsion phase outlet at the bottom, and the palmitic acid-water emulsion phase outlet is connected to the top inlet of the third stirred tank through a first jacketed and heated conveying pipe.

[0010] As a further technical solution, the second centrifugal pump is connected to the sewage tank through a second jacketed and heated delivery pipe.

[0011] As a further technical solution, the third centrifugal pump is connected to the palmitic acid tank via a third jacketed and heated delivery pipe.

[0012] As a further technical solution, the top side wall of the first stirred tank is provided with a water phase inlet and an oil phase inlet.

[0013] As a further technical solution, a water phase inlet is provided on the top side wall of the second stirred tank.

[0014] As a further technical solution, the centrifuge is provided with an anti-wear agent outlet at the top, which is connected to the top feed inlet of the second mixing vessel via a pipe.

[0015] As a further technical solution, the first jacketed heating conveying pipe and the second centrifugal pump are provided with jacketed return ports on the jackets of the second jacketed heating conveying pipe and / or the third jacketed heating conveying pipe.

[0016] As a further technical solution, the jacket return port is connected to the jacket return water tank.

[0017] As a further technical solution, the water temperature at the outlet on the top of the first centrifugal pump is 80-90℃.

[0018] The beneficial effects of the above-described embodiments of this utility model are as follows:

[0019] (1) This utility model installs a jacket on a long-distance transport pipe for palmitic acid and palmitic acid-containing wastewater, and uses the hot water phase generated by the anti-wear agent washing to heat the long-distance transport pipe, so as to prevent palmitic acid from solidifying or precipitating, ensure that the discharge pipe is unobstructed, reduce the consumption of heating steam, ensure the normal production of the anti-wear agent device, and improve the enterprise's efficiency.

[0020] (2) The anti-blocking system for the production process of diesel anti-wear agent of this utility model has good versatility. It can adjust the reaction type of the first stirring reactor according to the type of anti-wear agent, thereby meeting the continuous production of unsaturated fatty acids and unsaturated fatty acid ester type anti-wear agents. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0022] Figure 1 This is a schematic diagram of the overall structure of a post-treatment anti-clogging system for the production of diesel anti-wear agents according to this utility model;

[0023] The diagram is for illustrative purposes only.

[0024] The components include a first mixing vessel 101, a centrifuge 2, a second mixing vessel 102, a first centrifugal pump 301, a third mixing vessel 103, a second centrifugal pump 302, a third centrifugal pump 303, a first jacketed heat-traced conveying pipe 401, a second jacketed heat-traced conveying pipe 402, and a third jacketed heat-traced conveying pipe 403. Detailed Implementation

[0025] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] Example 1

[0027] In a typical embodiment of this utility model, such as Figure 1As shown, a diesel anti-wear agent production process anti-clogging system is provided, including a first mixing vessel 101, a centrifuge 2, a second mixing vessel 102, a first centrifugal pump 301, a third mixing vessel 103, a second centrifugal pump 302, and a third centrifugal pump 303. The bottom outlet of the first mixing vessel 101 is connected to the inlet of the centrifuge 2. The centrifuge 2 has outlets at its top and bottom, with the top outlet of the centrifuge 2 connected to the inlet of the second mixing vessel 102. The bottom outlet of the centrifuge 2 is connected to the top inlet of the third mixing vessel 103 via a first jacketed, heated conveying pipe 401. The third mixing vessel 103... The bottom outlet of the mixing vessel 103 is connected to the second centrifugal pump 302 and the third centrifugal pump 303 respectively through pipes, and the second centrifugal pump 302 and the third centrifugal pump 303 are connected in parallel; the second centrifugal pump 302 is connected to the sewage tank through the second jacketed and heated conveying pipe 402; the third centrifugal pump 303 is connected to the palmitic acid tank through the third jacketed and heated conveying pipe 403; the top of the first centrifugal pump 301 is provided with an outlet, which conveys water to the first jacketed and heated conveying pipe 401, the second jacketed and heated conveying pipe 402 and the third jacketed and heated conveying pipe 403 respectively through pipes.

[0028] The first mixing vessel 101 has a feed inlet on its top side wall, which is connected to the water phase pipeline and the oil phase pipeline respectively; the first mixing vessel 101 has a discharge outlet at its bottom, which is connected to the inlet of the first centrifugal pump 201.

[0029] Furthermore, to improve the versatility of the anti-clogging system provided for the production process of diesel anti-wear agents, the reaction type of the first stirred reactor can be adjusted according to the type of anti-wear agent, thereby meeting the requirements for continuous production of unsaturated fatty acid and unsaturated fatty acid ester type anti-wear agents. When the anti-wear agent is an unsaturated fatty acid, the first stirred reactor 101 is an emulsification stirred reactor, where the aqueous phase pipeline and the oil phase undergo cryogenic emulsification at low temperature (0-5℃, time 2-4h) in the first stirred reactor 101 to obtain the product; when the anti-wear agent is an unsaturated fatty acid ester type anti-wear agent, the first stirred reactor 101 is a reaction stirred reactor, typically using C16-C18 unsaturated fatty acids (such as oleic acid, linoleic acid, and linolenic acid), whose double bond structure can enhance molecular adsorption capacity, reacting with polyols (ethylene glycol, glycerol, etc.) through esterification reactions between the hydroxyl groups and carboxyl groups of fatty acids to generate ester compounds, while simultaneously releasing water molecules. For example, oleic acid reacts with glycerol to generate glyceryl oleate.

[0030] Centrifuge 2 is used to centrifuge and separate the product from the outlet of the first stirred tank 101 to obtain a crude anti-wear agent and a palmitic acid-water emulsion phase. The first centrifuge 2 has outlets at both the top and bottom. The top outlet of centrifuge 2 is used to discharge the crude anti-wear agent; the bottom outlet of centrifuge 2 is used to discharge the palmitic acid-water emulsion phase. The bottom outlet of centrifuge 2 is connected to the top inlet of the third stirred tank 103 via a pipe. The pipe is equipped with a jacket, through which a hot medium, such as hot water, can be introduced. The jacket also has a circulating water outlet. The third stirred tank 103 is used for high-temperature demulsification and separation of the palmitic acid-water emulsion phase.

[0031] The second mixing vessel 102 has a first feed inlet and a second feed inlet on its top sides, respectively. The outlet of the centrifuge 2 is connected to the first feed inlet of the second mixing vessel 102 via a pipe. The outlet of the centrifuge 2 delivers coarse anti-wear agent to the second mixing vessel 102 for water washing via the pipe. The second feed inlet of the second mixing vessel 102 is connected to the water phase, which adds water to the second mixing vessel 102. The bottom of the second mixing vessel 102 has a discharge outlet for discharging the mixture of high-temperature hot water and anti-wear agent. The discharge outlet at the bottom of the second mixing vessel 102 is connected to the first centrifugal pump 301 via a pipe. The first centrifugal pump 301 uses centrifugal force to draw the liquid (high-temperature hot water) into the pump and accelerate its flow, then discharges the liquid at high speed. The anti-wear agent is delivered to the anti-wear agent collection tank via a pipe.

[0032] The top of the first centrifugal pump 301 is provided with a water outlet. The water outlet discharges high-temperature hot water through a pipe to the first jacketed heating conveying pipe 401, which is connected to the bottom outlet of the centrifuge 2 and the top feed port of the third mixing vessel 103. The high-temperature hot water in the jacket is used to heat the palmitic acid-water emulsion phase in the pipe to prevent it from crystallizing and clogging the pipe.

[0033] The bottom of the third stirred tank 103 is equipped with a discharge port for discharging the palmitic acid-water emulsion phase after high-temperature demulsification. The discharge port at the bottom of the third stirred tank 103 is connected to the second centrifugal pump 302 and the third centrifugal pump 303 via a three-way pipe, with the second and third centrifugal pumps connected in parallel. The second centrifugal pump 302 is connected to a wastewater tank via a second jacketed and heated conveying pipe 402 (containing palmitic acid wastewater, low-temperature palmitic acid coagulation, and precipitated blockage pipe). The second centrifugal pump 302 is used to separate the wastewater and discharge it into the jacketed and heated conveying pipe. The third centrifugal pump 303 is connected to a palmitic acid storage tank via a third jacketed and heated conveying pipe 403. The third centrifugal pump 303 is used to separate palmitic acid and discharge it into the jacketed and heated conveying pipe.

[0034] The working process of the anti-clogging system in the production process of diesel anti-wear agent of this utility model is as follows:

[0035] The aqueous and oil phases are respectively transported through pipelines to the top inlet of the first stirred tank 101, where they undergo cryogenic emulsification (0-5℃, 2-4h) or reaction at low temperature (usually C16-C18 unsaturated fatty acids (such as oleic acid, linoleic acid, and linolenic acid), whose double bond structure enhances molecular adsorption capacity, and reacts with polyols (ethylene glycol, glycerol, etc.) through esterification reactions between the hydroxyl groups and the carboxyl groups of fatty acids to generate ester compounds, while releasing water molecules. For example, oleic acid reacts with glycerol to generate glyceryl oleate). The product is centrifuged by centrifuge 2 to obtain a crude anti-wear agent and a palmitic acid-water emulsion phase. The crude anti-wear agent is transported through the top outlet of centrifuge 2 to the second stirred tank 102 for water washing. The palmitic acid-water emulsion phase is transported through the bottom outlet of centrifuge 2 to the third stirred tank 103 for high-temperature demulsification separation.

[0036] The aqueous phase is also added to the second mixing vessel 102 through the second feed port at the top of the second mixing vessel 102. The bottom of the second mixing vessel 102 has a discharge port to discharge the mixture of high-temperature hot water and anti-wear agent. The first centrifugal pump 301 uses centrifugal force to draw the liquid (high-temperature hot water) into the pump and accelerate its flow, and then discharges the liquid from the pump body at high speed. The high-temperature hot water is then delivered to the first jacketed heating pipe 401, the second jacketed heating pipe 402, and the third jacketed heating pipe 403 for auxiliary heating of the delivery pipes.

[0037] The bottom of the third stirred tank 103 is equipped with a discharge port for discharging the palmitic acid-water emulsion phase after high-temperature demulsification. The discharge port at the bottom of the third stirred tank 103 is connected to the second centrifugal pump 302 and the third centrifugal pump 303 via pipes.

[0038] The second centrifugal pump 302 is connected to the sewage tank via a second jacketed and heated delivery pipe 402. The second centrifugal pump 302 is used to separate sewage and discharge it into the jacketed and heated delivery pipe. The third centrifugal pump 303 is connected to the palmitic acid storage tank via a third jacketed and heated delivery pipe 403. The third centrifugal pump 303 is used to separate palmitic acid and discharge it into the jacketed and heated delivery pipe.

[0039] The present invention provides an anti-blocking system for the production process of diesel anti-wear agent. The hot water phase (80-90℃) generated after the rough anti-wear agent is washed in the mixing tank is used to heat the discharge pipeline of palmitic acid and wastewater containing palmitic acid. This prevents the palmitic acid from solidifying or precipitating, ensures that the discharge pipeline is unobstructed, reduces the consumption of heating steam, ensures the normal production of the anti-wear agent unit, and improves the efficiency of the enterprise.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A diesel anti-wear additive production process anti-clogging system characterized by, It includes a first stirred tank, a centrifuge, a second stirred tank, a first centrifugal pump, and a third stirred tank connected in sequence, wherein the outlet of the third stirred tank is connected to the second centrifugal pump and the third centrifugal pump respectively through pipes, and the second centrifugal pump and the third centrifugal pump are connected in parallel. The top of the first centrifugal pump is provided with an outlet, and the outlet is respectively transported to the first, second and third jacketed heat-traced delivery pipes through pipelines.

2. The diesel anti-wear production process anti-block system of claim 1, wherein, The centrifuge has a palmitic acid-water emulsion phase outlet at the bottom, which is connected to the top inlet of the third stirred tank via a first jacketed and heated delivery pipe.

3. The diesel anti-wear production process anti-block system of claim 1, wherein, The second centrifugal pump is connected to the sewage tank via a second jacketed, heated delivery pipe.

4. The diesel anti-wear production process anti-block system of claim 1 wherein, The third centrifugal pump is connected to the palmitic acid tank via a third jacketed, heated delivery pipe.

5. The diesel anti-wear production process anti-occlusion system of claim 1, wherein, The top side wall of the first mixing vessel is equipped with an aqueous phase inlet and an oil phase inlet.

6. The diesel anti-wear production process anti-block system of claim 1 wherein, The second mixing vessel has a water phase inlet on its top side wall.

7. The diesel anti-wear production process anti-occlusion system of claim 1, wherein, The centrifuge is equipped with an anti-wear agent outlet at the top, which is connected to the top feed inlet of the second mixing vessel via a pipe.

8. The anti-clogging system for the diesel anti-wear agent production process according to claim 1, characterized in that, The first jacketed heating conveying pipe and the second centrifugal pump are provided with jacketed return ports on the jackets of the second jacketed heating conveying pipe and / or the third jacketed heating conveying pipe.

9. The anti-wear additive production process anti-clogging system of claim 8, wherein, The jacket return inlet is connected to the jacket return water tank.

10. The diesel anti-wear production process anti-occlusion system of claim 2, wherein, The water temperature at the outlet on the top of the first centrifugal pump is 80-90℃.

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