Waste gas recycling device in vegetable oil refining process

Abstract

The utility model provides a waste gas recycling device in a vegetable oil refining process, which relates to the field of vegetable fat processing and comprises a vacuum unit A, a vacuum unit B, a heat exchanger A, a heat exchanger B, an air filter and a gas recycling device. The heat exchanger A comprises a heat exchanger A air inlet, a heat exchanger A air outlet, a heat exchanger A oil inlet and a heat exchanger A oil outlet; a gas outlet of the alkali refining tank and a gas outlet of the decolorizing tank are respectively connected with a gas inlet of the heat exchanger A through first pipelines; a gas outlet of the heat exchanger A is connected with the gas recovery device sequentially through the vacuum unit A and the air filter; an oil inlet of the heat exchanger A is connected with a dewaxed oil conveying pipeline, an oil outlet of the heat exchanger A is connected with an oil inlet of the gassing tower, and a gas outlet of the gassing tower is communicated with the first pipeline. According to the utility model, the heat carried by the waste gas is effectively utilized and recycled, and dewaxed oil and deodorized oil are preheated, so that the energy is saved, the production cost is reduced, and the production benefit is improved.

Description

Technical Field

[0001] The utility model relates to the field of vegetable oil processing, in particular to a waste gas recovery and utilization device in the vegetable oil refining process. Background Art

[0002] Vegetable oil produces a lot of waste gas during the refining process, such as: alkali refining, waste gas generated by stirring during the bleaching process, the gas extracted by vacuum before deodorization, that is, compressed air, the gas removed after the oil enters the gas separation tower, the waste gas generated after deodorization, and the compressed air that is not used in the above refining process.

[0003] Often these exhaust gases are discharged directly into the atmosphere or directly into the atmosphere after being processed by cooling devices. The energy (heat and residual pressure) they carry is not fully utilized, resulting in a waste of resources.

[0004] Therefore, the present application provides a waste gas recovery and utilization device in refined vegetable oil to solve the above problems. Utility Model Content

[0005] The utility model provides a waste gas recovery and utilization device in the vegetable oil refining process, which solves the problem that the energy carried by the waste gas generated in the existing vegetable oil refining process cannot be recovered.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A waste gas recovery and utilization device in a vegetable oil refining process, comprising a vacuum unit A, a vacuum unit B, a heat exchanger A, a heat exchanger B, an air filter, and a gas recovery device;

[0008] The heat exchanger A includes an air inlet of the heat exchanger A, an air outlet of the heat exchanger A, an oil inlet of the heat exchanger A, and an oil outlet of the heat exchanger A;

[0009] The gas outlet of the alkali refining tank and the gas outlet of the decolorization tank are respectively connected to the gas inlet of the heat exchanger A through the first pipeline, and the gas outlet of the heat exchanger A is connected to the gas recovery device through the vacuum unit A and the air filter in turn; the oil inlet of the heat exchanger A is connected to the dewaxed oil delivery pipeline, and the oil outlet of the heat exchanger A is connected to the oil inlet of the gas analysis tower, and the gas analysis tower gas outlet of the gas analysis tower is connected to the first pipeline.

[0010] Furthermore, the heat exchanger B includes an air inlet of the heat exchanger B, an air outlet of the heat exchanger B, an oil inlet of the heat exchanger B, and an oil outlet of the heat exchanger B;

[0011] The oil outlet of the gas analysis tower is connected to the oil inlet of the heat exchanger B, and the oil outlet of the heat exchanger B is connected to the deodorization tower.

[0012] Furthermore, the deodorizing tower includes an oil inlet of the deodorizing tower, a first air outlet of the deodorizing tower and a second air outlet of the deodorizing tower, and the oil outlet of the heat exchanger B is connected to the oil inlet of the deodorizing tower; the first air outlet of the deodorizing tower is connected to the air inlet of the heat exchanger B, and the air outlet of the heat exchanger B is connected to the vacuum unit B.

[0013] Furthermore, the air outlet of the heat exchanger B is connected to the air inlet of the vacuum unit B, and the air outlet of the vacuum unit B is connected to the exhaust gas collection device.

[0014] Furthermore, the second air outlet of the deodorizing tower is connected to the vacuum unit A, the vacuum unit A is connected to the air filter, and the air filter is connected to the gas recovery device.

[0015] Furthermore, the decolorization tank outlet is connected to the first pipeline through a second pipeline, and the second pipeline is provided with a second valve; the first pipeline is provided with a first valve;

[0016] The air outlet of the heat exchanger A is connected to the vacuum unit A through a third pipe, and a third valve is provided on the third pipe;

[0017] A fourth valve is provided on the wax oil delivery pipeline;

[0018] The gas outlet of the gas analysis tower is connected to the first pipeline through a fourth pipeline, and a fifth valve is provided on the fourth pipeline.

[0019] Furthermore, the oil outlet of the gas analysis tower is connected to the oil inlet of the heat exchanger B through a fifth pipe, and the oil outlet of the heat exchanger group B is connected to the oil inlet of the deodorization tower through a sixth pipe. The fifth pipe and the sixth pipe are respectively provided with a sixth valve and a seventh valve.

[0020] Furthermore, the first air outlet of the deodorizing tower is connected to the air inlet of the heat exchanger B through a seventh pipe, and an eighth valve is provided on the seventh pipe.

[0021] Furthermore, the gas outlet of the vacuum unit B is connected to the exhaust gas collection device through an eighth pipe, and a ninth valve is provided on the eighth pipe.

[0022] Furthermore, the second gas outlet of the deodorizing tower is connected to the vacuum unit A through a ninth pipeline, and a tenth valve is provided on the ninth pipeline.

[0023] The beneficial effects of the present invention are:

[0024] The utility model effectively utilizes the heat carried by the exhaust gas, recycles it, and preheats the dewaxed oil and the deodorized oil, thereby saving energy, reducing production costs, and improving production efficiency.

[0025] The utility model collects and reuses the waste gas generated in the production process of refined vegetable oil, and further converts it into electrical energy or thermal energy, thereby realizing efficient utilization of waste gas resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a structural schematic diagram of the present utility model.

[0028] Description of Figure Numbers:

[0029] 1. Alkali refining tank; 2. Decolorization tank; 3. Deodorization tower; 4. Gas analysis tower; 5. Heat exchanger A; 6. Heat exchanger B; 7. Gas recovery device; 8. Vacuum unit A; 9. Vacuum unit B; 10. Air filter; 11. Alkali refining tank outlet; 21. Decolorization tank outlet; 31. First air outlet of deodorization tower; 32. Second air outlet of deodorization tower; 33. Oil inlet of deodorization tower; 41. Gas analysis tower outlet; 51. Air inlet of heat exchanger A; 52. Air outlet of heat exchanger A; 53. Oil outlet of heat exchanger A; 54. Oil inlet of heat exchanger; 61. Oil inlet of heat exchanger B; 62. , heat exchanger B air outlet and oil outlet; 63, heat exchanger B air inlet; 64, heat exchanger B air outlet; 01, first pipeline; 02, second pipeline; 03, third pipeline; 04, fourth pipeline; 05, fifth pipeline; 06, sixth pipeline; 07, seventh pipeline; 08, eighth pipeline; 09, ninth pipeline; 001, first valve; 002, second valve; 003, third valve; 004, fourth valve; 005, fifth valve; 006, sixth valve; 007, seventh valve; 008, eighth valve; 009, ninth valve; 0010, tenth valve. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0034] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0035] The utility model provides a technical solution: a waste gas recovery and utilization device in the vegetable oil refining process, such as Figure 1 As shown, it includes an alkali refining tank 1, a decolorizing tank 2, a deodorizing tower 3, a vacuum machine A8, a vacuum unit B9, a gas analysis tower 4, a heat exchanger A5, a heat exchanger B6, an air filter 10, a gas recovery device 7, and several pipelines.

[0036] Heat exchanger A5 includes a heat exchanger A air inlet 51, a heat exchanger A air outlet 52, a heat exchanger A oil inlet 54, and a heat exchanger A oil outlet 53;

[0037] The gas outlet 11 of the alkali refining tank and the gas outlet 21 of the decolorizing tank are respectively connected to the gas inlet 51 of the heat exchanger A through the first pipeline 01, and the gas outlet 52 of the heat exchanger A is connected to the gas recovery device 7 through the vacuum unit A8 and the air filter 10 in sequence; the oil inlet 54 of the heat exchanger A is connected to the dewaxed oil delivery pipeline, and the oil outlet 53 of the heat exchanger A is connected to the oil inlet of the gas analysis tower 4, and the gas analysis tower gas outlet 41 of the gas analysis tower 4 is connected to the first pipeline 01.

[0038] Heat exchanger B6 includes heat exchanger B air inlet 63, heat exchanger B air outlet 64, heat exchanger B oil inlet 61 and heat exchanger B oil outlet 62;

[0039] The oil outlet of the gas analysis tower 4 is connected to the oil inlet 61 of the heat exchanger B, and the oil outlet 62 of the heat exchanger B is connected to the deodorization tower 3.

[0040] The deodorizing tower 3 includes a deodorizing tower oil inlet 33, a deodorizing tower first air outlet 31 and a deodorizing tower second air outlet 32. The oil outlet 62 of the heat exchanger B is connected to the deodorizing tower oil inlet 33; the first air outlet 31 of the deodorizing tower is connected to the air inlet 63 of the heat exchanger B, and the air outlet 64 of the heat exchanger B is connected to the vacuum unit B9.

[0041] The air outlet 64 of the heat exchanger B is connected to the air inlet of the vacuum unit B9, and the air outlet of the vacuum unit B9 is connected to the exhaust gas collection device.

[0042] The second gas outlet 32 ​​of the deodorizing tower is connected to the vacuum unit A8, the vacuum unit A8 is connected to the air filter 10, and the air filter 10 is connected to the gas recovery device 7.

[0043] The decolorization tank outlet 21 is connected to the first pipeline 01 through the second pipeline 02. The second pipeline 02 is provided with a second valve 002. The first pipeline 01 is provided with a first valve 001.

[0044] The heat exchanger A outlet 52 is connected to the vacuum unit A8 through the third pipe 03, and the third pipe 03 is provided with a third valve 003;

[0045] A fourth valve 004 is provided on the wax oil delivery pipeline;

[0046] The gas outlet 41 of the gas analysis tower is connected to the first pipeline 01 through the fourth pipeline 04 , and a fifth valve 005 is provided on the fourth pipeline 04 .

[0047] The oil outlet of the gas analysis tower 4 is connected to the oil inlet 61 of the heat exchanger B through the fifth pipeline 05, and the oil outlet 62 of the heat exchanger group B is connected to the oil inlet 33 of the deodorization tower through the sixth pipeline 06. The sixth valve 006 and the seventh valve 007 are respectively provided on the fifth pipeline 05 and the sixth pipeline 06.

[0048] The first air outlet 31 of the deodorizing tower is connected to the air inlet 63 of the heat exchanger B through the seventh pipeline 07 , and the eighth valve 008 is provided on the seventh pipeline 07 .

[0049] The gas outlet of the vacuum unit B9 is connected to the exhaust gas collection device through the eighth pipeline 08, and the eighth pipeline 08 is provided with a ninth valve 009.

[0050] The second gas outlet 32 ​​of the deodorizing tower is connected to the vacuum unit A8 through a ninth pipeline 09 , and a tenth valve 0010 is provided on the ninth pipeline 09 .

[0051] Example 1

[0052] The working process of the device in this embodiment is as follows:

[0053] After the alkali refining tank 1 and the decolorizing tank 2 are in operation, the waste gas generated by stirring and the unused compressed air flow out from the air outlet, flow into the steam heat exchanger A from the air inlet 51 through the first pipe 01, and flow out from the heat exchanger A from the air outlet 52. At the same time, the dewaxed oil enters the steam heat exchanger A from the oil inlet 54 and flows out from the oil outlet 53 to perform heat exchange and heat the dewaxed oil.

[0054] The gas flowing out from the gas outlet 52 of the heat exchanger A passes through the third pipe 03, flows out of the vacuum unit A8, enters the air filter 10, and then flows to the gas recovery device 7 to be recovered for use.

[0055] Before deodorization, the dewaxed oil first enters the degassing tower 4 for degassing. The degassed waste gas flows out from the gas outlet (41) of the degassing tower, passes through the fourth pipeline 04 and the first pipeline 01, flows into the steam heat exchanger A from the air inlet 51, flows out from the heat exchanger A outlet 52, and is further heat-exchanged with the dewaxed oil before being transferred to the gas recovery device 7.

[0056] Before deodorization, operate the vacuum unit B9 to maintain the vacuum degree of the deodorization tower, and extract the waste gas through the second gas outlet 32 ​​of the deodorization tower to flow to the vacuum unit A8, pass through the vacuum unit 8, and be filtered by the air filter 10 before being sent to the gas recovery device 7.

[0057] During deodorization, the removed waste gas is discharged from the first air outlet 31 of the deodorization tower together with water vapor, flows into the air inlet 63 of the steam heat exchanger B through the seventh pipe 07, and flows out from the air outlet 63 of the heat exchanger B. At the same time, the undeodorized oil flows into the oil inlet 61 of the steam heat exchanger B through the fifth pipe 05, and flows out from the oil inlet 62 of the heat exchanger B, thereby realizing heat exchange between the deodorized waste gas and the undeodorized oil, further preheating the undeodorized oil, and thus realizing full utilization of the waste gas heat.

[0058] During deodorization, the unused compressed air flows from the second air outlet 32 ​​of the deodorization tower to the vacuum unit A8, passes through the vacuum unit A8, is filtered by the air filter 10, and is sent to the gas recovery device 7 to be subsequently converted into heat energy or electrical energy for further utilization.

[0059] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste gas recovery and utilization device in the vegetable oil refining process, characterized in that: It includes a vacuum unit A (8), a vacuum unit B (9), a heat exchanger A (5), a heat exchanger B (6), an air filter (10), and a gas recovery device (7); The heat exchanger A (5) comprises a heat exchanger A air inlet (51), a heat exchanger A air outlet (52), a heat exchanger A oil inlet (54), and a heat exchanger A oil outlet (53); The gas outlet (11) of the alkali refining tank and the gas outlet (21) of the decolorizing tank are respectively connected to the gas inlet (51) of the heat exchanger A through the first pipeline (01); the gas outlet (52) of the heat exchanger A is connected to the gas recovery device (7) through the vacuum unit A (8) and the air filter (10) in sequence; the oil inlet (54) of the heat exchanger A is connected to the dewaxed oil delivery pipeline; the oil outlet (53) of the heat exchanger A is connected to the oil inlet of the gas analysis tower (4); and the gas analysis tower gas outlet (41) of the gas analysis tower (4) is communicated with the first pipeline (01).

2. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 1, characterized in that: The heat exchanger B (6) includes a heat exchanger B air inlet (63), a heat exchanger B air outlet (64), a heat exchanger B oil inlet (61) and a heat exchanger B oil outlet (62); The oil outlet of the gas analysis tower (4) is connected to the oil inlet (61) of the heat exchanger B, and the oil outlet (62) of the heat exchanger B is connected to the deodorization tower (3).

3. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 2, characterized in that: The deodorizing tower (3) comprises a deodorizing tower oil inlet (33), a first deodorizing tower air outlet (31), and a second deodorizing tower air outlet (32); the oil outlet (62) of the heat exchanger B is connected to the deodorizing tower oil inlet (33); the first deodorizing tower air outlet (31) is connected to the air inlet (63) of the heat exchanger B, and the air outlet (64) of the heat exchanger B is connected to the vacuum unit B (9).

4. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 3, characterized in that: The air outlet (64) of the heat exchanger B is connected to the air inlet of the vacuum unit B (9), and the air outlet of the vacuum unit B (9) is connected to the exhaust gas collection device.

5. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 3, characterized in that: The second gas outlet (32) of the deodorizing tower is connected to a vacuum unit A (8), the vacuum unit A (8) is connected to an air filter (10), and the air filter (10) is connected to a gas recovery device (7).

6. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 1, characterized in that: The decolorization tank gas outlet (21) is connected to the first pipeline (01) through a second pipeline (02), and a second valve (002) is provided on the second pipeline (02); and a first valve (001) is provided on the first pipeline (01); The air outlet (52) of the heat exchanger A is connected to the vacuum unit A (8) via a third pipe (03), and a third valve (003) is provided on the third pipe (03); The wax oil delivery pipeline is provided with a fourth valve (004); The gas outlet (41) of the gas analysis tower is connected to the first pipeline (01) through a fourth pipeline (04), and a fifth valve (005) is provided on the fourth pipeline (04).

7. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 2, characterized in that: The oil outlet of the gas analysis tower (4) is connected to the oil inlet (61) of the heat exchanger B via a fifth pipeline (05), and the oil outlet (62) of the heat exchanger B is connected to the oil inlet (33) of the deodorization tower via a sixth pipeline (06). The fifth pipeline (05) and the sixth pipeline (06) are respectively provided with a sixth valve (006) and a seventh valve (007).

8. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 3, characterized in that: The first air outlet (31) of the deodorizing tower is connected to the air inlet (63) of the heat exchanger B via a seventh pipeline (07), and an eighth valve (008) is provided on the seventh pipeline (07).

9. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 4, characterized in that: The gas outlet of the vacuum unit B (9) is connected to the waste gas collection device through an eighth pipe (08), and a ninth valve (009) is provided on the eighth pipe (08).

10. The waste gas recovery and utilization device in the vegetable oil refining process according to claim 5, characterized in that: The second gas outlet (32) of the deodorizing tower is connected to the vacuum unit A (8) via a ninth pipeline (09), and a tenth valve (0010) is provided on the ninth pipeline (09).

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