Alkali-washing and water-washing deacidification device for biodiesel

Abstract

The utility model provides a biodiesel alkali washing and water washing deacidification device which comprises a heat preservation kettle which is of a clamp-shaped structure with a wide upper part and a narrow lower part and is gradually folded at a discharge port; the high-temperature circulating all-in-one machine is arranged on one side of the heat preservation kettle and is used for providing and maintaining a high-temperature environment required by the heat preservation kettle; the temperature control heater is arranged at the top end of the heat preservation kettle and is used for controlling and maintaining the temperature of the washing solution; the spraying device is communicated with the temperature control heater through a connecting pipe, so that the alkali liquor or the aqueous solution is uniformly sprayed into the biodiesel. The device is simple in structure, equipment is relatively integrated, the requirements of spraying, spraying object heating and on-line splitting of materials after standing and layering are met at the same time, and the process efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a biodiesel alkali washing and water washing deacidification device. Background Art

[0002] The acid value indicates the amount of free fatty acids in the oil and fat, indicating the quality of the oil. These free fatty acids are mainly caused by hydrolysis, thermal oxidation, photooxidation and other reasons. A series of complex reactions such as hydrolysis and oxidation of oil and fat will cause the color of the oil to deepen, the acid value to increase, and produce some volatiles and substances with pungent odors such as aldehydes, ketones, and lactones. The acid value of biodiesel refers to the number of milligrams of potassium hydroxide required to neutralize the acidic substances in 1 gram of oil and fat. This is a key data reflecting the quality grade of biodiesel products and an important indicator for determining the grade of biodiesel products. Fuels with high acid values ​​are prone to corrosion, and residual metals may cause engine deposition and wear, and cause pump and injector failure, resulting in increased exhaust smoke from diesel vehicles and difficulty in starting. The acid value of biodiesel should not be greater than 0.5mgKOH / g. For crude biodiesel, the process is different due to the different acid values ​​of the products in different batches. For oils with acid values ​​between 2-15 mgKOH / g after the immobilized lipase conversion, it is more economical to use alkali refining and deacidification treatment; for oils with acid values ​​still greater than 15 mgKOH / g, it is more economical to use acid catalyst re-esterification; finally, the alkali-refined or re-esterified oils are washed with water, and 15% of the weight of the oil is added under spraying conditions. 75°C hot water is washed until the water phase is neutral. Stand and separate to enter the subsequent procedures.

[0003] At present, the function of oil deacidification equipment is single, and multiple devices are often required to be built in a modular way. This method has the advantage of strong operability when the process is complex and the conditions are changing. However, for the heating, spraying and standing processes, it is too complicated and cumbersome, not only can it not improve the process efficiency, but also takes up too much space. Therefore, in order to integrate the equipment and meet the requirements of spraying, heating of the sprayed material and online cutting of the material after standing stratification to improve the process efficiency. The inventor designed a deacidification device specifically for alkali washing and water washing of biodiesel to meet the process requirements. Utility Model Content

[0004] The utility model provides a biodiesel alkali washing and water washing deacidification device, which can effectively solve the above problems.

[0005] The utility model is achieved in this way:

[0006] A biodiesel alkali washing and water washing deacidification device, comprising

[0007] The heat preservation kettle is a clamp-like structure that is wide at the top and narrow at the bottom, and gradually closes to the discharge port;

[0008] A high temperature circulation integrated machine, which is arranged on one side of the heat preservation kettle and is used to provide and maintain the high temperature environment required by the heat preservation kettle;

[0009] A temperature-controlled heater, which is disposed at the top of the heat-insulating kettle and is used to control and maintain the temperature of the washing solution;

[0010] A spraying device, which is connected to the temperature-controlled heater through a connecting pipe, so as to evenly spray the alkali solution or the aqueous solution into the biodiesel;

[0011] The first cutting opening and the second cutting opening are arranged on the side wall of the heat preservation kettle and are used for cutting fat at different stages.

[0012] As a further improvement, the first incision and the second incision are staggered up and down and are on the side wall of the heat preservation kettle.

[0013] As a further improvement, a feed inlet is provided at the top of the heat preservation kettle and away from the temperature control heater.

[0014] As a further improvement, a glass liner with scale is provided inside the temperature-controlled heater.

[0015] As a further improvement, the temperature-controlled heater is also equipped with a self-priming diaphragm acid- and alkali-resistant high-pressure pump connected to the spray spray device.

[0016] As a further improvement, at least two pipes are connected between the high-temperature circulation integrated machine and the insulation kettle.

[0017] As a further improvement, the two pipes are staggered up and down, the upper pipe is the output pipe, and the lower pipe is the input pipe, so that the outside of the insulation kettle can be kept at a constant temperature through the high-temperature circulation integrated machine.

[0018] As a further improvement, the outside of the insulation kettle is wrapped with an insulation jacket connected to the two pipes.

[0019] The beneficial effects of the utility model are:

[0020] (1) The utility model improves the original equipment which has a single function and cannot satisfy the functions of online heating, spraying, standing and cutting at the same time. A temperature control heater is designed on the top of the heat preservation kettle. A quantitative glass liner is placed inside the temperature control heater, which is connected to a self-priming diaphragm acid and alkali resistant high-pressure pump. The spray spray device 3 is placed above the heat preservation kettle and adopts a distributed nozzle. The spray droplets can evenly cover the entire oil surface, causing it to settle slowly and evenly. In order to facilitate the observation and understanding of the sedimentation and cutting of the material, the heat preservation kettle is made of glass, and a first cutting opening and a second cutting opening are added. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is the front view of the utility model.

[0023] Description of Figure Numbers:

[0024] 1. Insulated kettle; 2. Temperature control heater; 3. Spraying device; 4. First cutting opening; 5. Second cutting opening; 6. Discharge opening; 7. High temperature circulation integrated machine; 8. Feed opening; 9. Pipeline; 10. Glass liner. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0026] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] Reference Figure 1 As shown, a biodiesel alkali washing and water washing deacidification device comprises

[0028] The heat preservation kettle 1 is a clamp-like structure that is wide at the top and narrow at the bottom, and gradually converges to a discharge port 6 ; a feed port 8 is provided at the top of the heat preservation kettle 1 and away from the temperature control heater 2 .

[0029] The grease is introduced into the heat preservation kettle 1 through the feed port 8. After spraying, the droplets combine with the acid and other substances in the grease and slowly sink, and gradually stratify, and gradually gather at the narrowing point. The heat preservation kettle 1 is transparently designed, so the separation situation can be observed in real time, thereby improving the separation efficiency.

[0030] It should be noted that the characteristics of the precipitated product of oil washing are water-soluble viscous substances, which contain grease components in the initial stage of precipitation, resulting in the loose precipitation of the precipitate slowly. In the precipitation process in a normal kettle, the precipitation stratification is not obvious, and the contact range of the precipitation surface is large, which makes it difficult to achieve a good division in a short time. Therefore, the first sub-cut 4 and the second sub-cut 5 are staggered up and down and on the side wall of the insulation kettle 1. When the insulation kettle 1 is designed to be wide at the top and narrow at the bottom, the wide top can make the spray surface larger and the spray droplets more evenly distributed; the narrow bottom can narrow the precipitation area, reduce the liquid surface contact area during stratification, and better separate. At the same time, due to the different densities of grease and impurities, they will descend and separate in the insulation kettle 1.

[0031] The high-temperature circulation integrated machine 7 is arranged on one side of the insulation kettle 1 and is used to provide and maintain the high-temperature environment required by the insulation kettle 1. The high-temperature circulation integrated machine 7 has an internal and external circulation function. The circulation pump can lead the medium in the tank to the insulation kettle 1 to maintain the temperature of the insulation kettle 1.

[0032] The temperature-controlled heater 2 is arranged at the top of the insulation kettle 1 and is used to control and maintain the temperature of the washing solution; a glass liner 10 with a scale is arranged inside the temperature-controlled heater 2, and the temperature-controlled heater 2 is also equipped with a self-priming diaphragm acid-resistant and alkali-resistant high-pressure pump connected to the spray spray device 3; wherein, by heating the alkaline solution or aqueous solution in the glass liner 10, a cleaning solution is provided to the grease in the insulation kettle 1 quantitatively and at all times.

[0033] It should be noted that the temperature control heater 2 should maintain a suitable temperature to promote the reaction and separation process, but avoid overheating to cause the grease and impurities to mix. The temperature is not limited here and can be set according to actual conditions.

[0034] The spray spray device 3 is connected to the temperature control heater 2 through a connecting pipe, so as to evenly spray the alkali solution or water solution into the biodiesel. It should be noted that the spray spray device 3 is designed as a disc, covering the circular surface of the tank body, and the spray head can be closed and opened according to the actual situation to meet the requirements of the droplet size during washing.

[0035] The first dividing cut 4 and the second dividing cut 5 are arranged on the side wall of the heat preservation kettle 1, and are used for cutting oil at different stages; wherein, the clarified oil is timely cut and collected through the first dividing cut 4 and the second dividing cut 5, and enters the subsequent procedure, and the remaining oil needs to continue to precipitate to a certain extent before cutting, and finally the precipitate is discharged and collected through the discharge port 6 at the bottom of the kettle.

[0036] At least two pipes 9 are connected between the high-temperature circulation integrated machine 7 and the insulation kettle 1; the two pipes 9 are staggered up and down, the upper pipe 9 is the output pipe, and the lower pipe 9 is the input pipe, so that the outside of the insulation kettle 1 can be kept at a constant temperature through the high-temperature circulation integrated machine 7. Furthermore, the outside of the insulation kettle 1 is wrapped with an insulation jacket connected to the two pipes 9.

[0037] It should be noted that the alkaline washing and water washing processes in this case are operated separately, with alkaline washing first and then water washing.

[0038] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A biodiesel alkali washing and water washing deacidification device, characterized in that: include The heat preservation kettle (1) is a clamp-like structure that is wide at the top and narrow at the bottom and gradually converges to the discharge port (6); A high-temperature circulation integrated machine (7), which is arranged on one side of the heat preservation kettle (1) and is used to provide and maintain the high-temperature environment required by the heat preservation kettle (1); A temperature control heater (2), which is arranged at the top of the heat preservation kettle (1) and is used to control and maintain the temperature of the washing solution; A spraying device (3) is connected to the temperature-controlled heater (2) via a connecting pipe, so as to evenly spray the alkaline solution or the aqueous solution into the biodiesel; The first cutting opening (4) and the second cutting opening (5) are arranged on the side wall of the heat preservation kettle (1) and are used for cutting fat at different stages.

2. A biodiesel alkali washing and water washing deacidification device according to claim 1, characterized in that: The first incision (4) and the second incision (5) are staggered up and down and are located on the side wall of the heat preservation kettle (1).

3. A biodiesel alkali washing and water washing deacidification device according to claim 1, characterized in that: A feed inlet (8) is provided at the top of the heat-insulating kettle (1) and away from the temperature-control heater (2).

4. A biodiesel alkali washing and water washing deacidification device according to claim 1, characterized in that: A glass liner (10) with scales is arranged inside the temperature-controlled heater (2).

5. A biodiesel alkali washing and water washing deacidification device according to claim 1, characterized in that: The temperature-controlled heater (2) is also equipped with a self-priming diaphragm acid- and alkali-resistant high-pressure pump connected to the spray spray device (3).

6. A biodiesel alkali washing and water washing deacidification device according to claim 1, characterized in that: At least two pipes (9) are connected between the high-temperature circulation integrated machine (7) and the heat-insulating kettle (1).

7. A biodiesel alkali washing and water washing deacidification device according to claim 6, characterized in that: The two pipes (9) are staggered in an upper and lower arrangement, the upper pipe (9) being an output pipe and the lower pipe (9) being an input pipe, thereby enabling the exterior of the heat preservation kettle (1) to be kept at a constant temperature through the high-temperature circulation integrated machine (7).

8. A biodiesel alkali washing and water washing deacidification device according to claim 6, characterized in that: The outside of the heat-insulating kettle (1) is wrapped with a heat-insulating jacket which is in communication with the two pipes (9).

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