A biodiesel tail gas washing device

Abstract

The utility model discloses a biodiesel tail gas washing device, including a spray tower, an air intake mechanism and two washing mechanisms, belonging to the field of biodiesel technology, and solving the technical problems that some spray towers have insufficient contact and mixing of washing liquid and gas, short contact time leading to poor effect of washing liquid in absorbing harmful gases, difficulty in production due to overall forming of fillers, and low utilization rate of washing liquid. The cooling mechanism of the utility model cools the biodiesel tail gas, slows down the rising speed of the tail gas in the spray tower, and prolongs the contact time between the tail gas and the washing liquid; multiple filler units are stacked in an orderly staggered manner, and the rising tail gas is diverted multiple times, so that the tail gas is dispersed in an orderly manner, which is conducive to the contact and mixing of the tail gas and the washing liquid; the upwardly inclined amplification chamber encloses the washing liquid sprayed from the nozzle, so that the washing liquid is sprayed onto the filler amplification layer, preventing the washing liquid from being sprayed excessively onto the inner wall of the spray tower, and improving the utilization rate of the washing liquid.

Description

Technical Field

[0001] The utility model belongs to the technical field of biodiesel, and in particular relates to a biodiesel tail gas washing device. Background Art

[0002] Due to the complexity of the raw materials used to produce biodiesel, the exhaust gas produced during the production of biodiesel is relatively complex, including mixed organic exhaust gases such as alcohols, aldehydes, ketones, esters, and mixed inorganic exhaust gases such as nitrogen oxides, sulfides, chlorides, and phosphides. Direct discharge will pollute the natural environment. Therefore, before the biodiesel exhaust is discharged, toxic and harmful substances in the exhaust gas need to be removed. When pre-treating the biodiesel exhaust generated by the biodiesel production device, a spray tower is usually used to absorb the acidic gas in the biodiesel exhaust. Nowadays, some spray towers have technical problems such as insufficient contact and mixing between washing liquid and gas and short contact time, which leads to poor effect of washing liquid in absorbing harmful gases. In the process of washing the exhaust gas, the fillers in the spray tower body are laid flat, and when the spray mechanism in the spray tower body sprays washing liquid, the washing liquid sprayed by the spray head is radial. Some washing liquid will be sprayed to the tower wall and flow to the bottom of the tower along the tower wall. The washing liquid sprayed to the tower wall is not used to soak the fillers, which reduces the utilization rate of the washing liquid. The fillers in some spray tower bodies are formed as a whole, which makes production and manufacturing more difficult. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a biodiesel tail gas washing device to at least solve part of the above technical problems.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A biodiesel exhaust scrubbing device comprises a spray tower connected to an exhaust exhaust device of a biodiesel production system, and a scrubbing mechanism arranged in the spray tower; the scrubbing mechanism comprises a packing mechanism and a spray mechanism arranged in the spray tower in sequence along the air flow direction in the spray tower; the packing mechanism comprises a packing bottom layer arranged in the spray tower, and a packing amplification layer located on the top of the packing bottom layer, an amplification cavity is formed between the packing amplification layer and the packing bottom layer, and the wall of the amplification cavity is gradually inclined upward in the direction from the top of the packing bottom layer to the inner wall of the spray tower.

[0006] Furthermore, the spray mechanism includes a spray pipe arranged in the spray tower and located above the filler expansion layer, and a plurality of spray heads arranged on the spray pipe; the spray surface of the spray head is located in the expansion cavity, and an infusion mechanism connected to the spray pipe is arranged outside the spray tower.

[0007] Furthermore, the infusion mechanism includes a liquid storage tank arranged outside the spray tower, a first infusion tube connected from the liquid storage tank, an infusion pump connected from the first infusion tube, and a second infusion tube connected from the infusion pump and connected to the spray tube; a second valve is provided on the first infusion tube.

[0008] Furthermore, the infusion mechanism also includes a third infusion tube connected from the bottom of the spray tower and connected to the first infusion tube, the third infusion tube is provided with a first valve, and the second valve is located between the third infusion tube and the liquid storage tank.

[0009] Furthermore, the filler bottom layer and the filler expansion layer each include a plurality of filler units, and the filler unit includes a filler support frame and a plurality of filling rings coaxially arranged in the filler support frame.

[0010] Furthermore, a support rod for supporting the filling ring is provided in the filler support frame.

[0011] Furthermore, a plurality of first convex strips are evenly distributed on the inner wall of the filler support frame.

[0012] Furthermore, a plurality of second convex strips are evenly distributed on the inner wall of the filling ring.

[0013] Furthermore, it also includes an air intake mechanism, which includes a cooling box and an air intake pipe connected from the exhaust gas exhaust device of the biodiesel production system and connected to the spray tower. The air intake pipe is provided with a spiral pipe section, which is located in the coolant of the cooling box.

[0014] Furthermore, a gas exhaust pipe is connected to the top of the spray tower, and a third valve and a fan are sequentially arranged on the gas exhaust pipe along the air flow direction thereof; there are two washing mechanisms, and the two washing mechanisms are distributed in the spray tower in upper and lower layers.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model has a simple structure, a scientific and reasonable design, and is easy to use. The utility model is provided with a cooling mechanism to appropriately cool the biodiesel exhaust gas, slow down the rising speed of the exhaust gas in the spray tower, prolong the contact time between the exhaust gas and the washing liquid, and can improve the absorption effect of the washing liquid on toxic and harmful substances in the exhaust gas; the packing mechanism of the utility model adopts a multi-layer packing unit stacked in an orderly staggered manner, and the rising exhaust gas is diverted for multiple times, so that the exhaust gas is orderly dispersed, which is conducive to the contact and mixing of the exhaust gas and the washing liquid, and can improve the absorption rate of the washing liquid on toxic and harmful substances in the exhaust gas; an amplification cavity is formed between the packing amplification layer and the packing bottom layer of the utility model, the liquid outlet surface of the spray head is located in the amplification cavity, and the cavity wall of the amplification cavity gradually tilts upward from the top of the packing bottom layer to the inner wall of the spray tower, and the upwardly tilted amplification cavity can enclose the washing liquid sprayed by the spray head, so that the washing liquid is sprayed onto the packing amplification layer, and the washing liquid is prevented from being sprayed excessively onto the inner wall of the spray tower, thereby improving the utilization rate of the washing liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model.

[0018] Figure 2 A schematic diagram of one of the packing units in the packing layer.

[0019] Figure 3 Schematic diagram of the filler support frame.

[0020] Figure 4 Schematic diagram of the filling ring.

[0021] Figure 5 It is a schematic diagram of the first convex strip diverting the exhaust gas when the packing units are stacked in an offset manner.

[0022] Figure 6 It is a schematic diagram of the second convex strip diverting the exhaust gas when the packing units are stacked in an offset manner.

[0023] Figure 7 A schematic diagram of one of the packing units in the packing expansion layer.

[0024] Figure 8 A schematic diagram of one of the packing units in the packing expansion layer.

[0025] The names corresponding to the reference numerals are:

[0026] 1-spray tower, 3-filling mechanism, 4-spraying mechanism, 5-filling bottom layer, 6-filling amplification layer, 7-amplification chamber, 8-filling unit, 9-spray head, 10-liquid storage tank, 11-first infusion tube, 12-infusion pump, 13-second infusion tube, 14-third infusion tube, 15-first valve, 16-second valve, 17-filling support frame, 18-filling ring, 19-support rod, 20-first convex strip, 21-second convex strip, 23-cooling box, 22-inlet pipe, 24 spiral pipe section, 25-gas exhaust pipe, 26-third valve, 27-fan, 28-spray pipe, 29-discharge pump. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example 1

[0031] like Figure 1-8 As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0032] The utility model has a simple structure, a scientific and reasonable design, and is easy to use. The utility model is provided with a cooling mechanism to appropriately cool the biodiesel exhaust gas, slow down the rising speed of the exhaust gas in the spray tower, prolong the contact time between the exhaust gas and the washing liquid, and can improve the absorption effect of the washing liquid on toxic and harmful substances in the exhaust gas; the packing mechanism of the utility model adopts a multi-layer packing unit 8 that is stacked in an orderly staggered manner, and the rising exhaust gas is diverted for multiple times, so that the exhaust gas is orderly dispersed, which is conducive to the contact and mixing of the exhaust gas and the washing liquid, and can improve the absorption rate of the washing liquid on toxic and harmful substances in the exhaust gas; an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5 of the utility model, the liquid outlet end of the spray head is located in the amplification cavity 7, and the wall of the amplification cavity gradually tilts upward from the top of the packing bottom layer to the inner wall of the spray tower, and the upwardly tilted amplification cavity can enclose the washing liquid sprayed by the spray head, so that the washing liquid is sprayed onto the packing amplification layer, and the washing liquid is prevented from being sprayed excessively onto the inner wall of the spray tower, thereby improving the utilization rate of the washing liquid.

[0033] Figure 5 and Figure 6 The arrows in the diagram indicate the direction of air flow.

[0034] Example 2

[0035] like Figure 1-8 As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0036] The spray mechanism 4 includes a spray pipe 28 arranged in the spray tower 1 and located above the filler expansion layer 6, and a plurality of spray heads 9 arranged on the spray pipe 28; the spray surface of the spray head 9 is located in the expansion chamber 7, and an infusion mechanism connected to the spray pipe 28 is arranged outside the spray tower 1.

[0037] In the second embodiment, the liquid infusion mechanism delivers the washing liquid to the spray pipe 28, and the spray head 9 sprays the washing liquid in the spray pipe 28 to the filling mechanism.

[0038] Example 3

[0039] like Figure 1-8As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0040] The spray mechanism 4 includes a spray pipe 28 arranged in the spray tower 1 and located above the filler expansion layer 6, and a plurality of spray heads 9 arranged on the spray pipe 28; the spray surface of the spray head 9 is located in the expansion chamber 7, and an infusion mechanism connected to the spray pipe 28 is arranged outside the spray tower 1.

[0041] The infusion mechanism includes a liquid storage tank 10 arranged outside the spray tower 1, a first infusion tube 11 connected from the liquid storage tank 10, an infusion pump 12 connected from the first infusion tube 11, and a second infusion tube 13 connected from the infusion pump 12 and connected to the spray pipe 28; a second valve 16 is provided on the first infusion tube 11.

[0042] The infusion mechanism also includes a third infusion tube 14 connected from the bottom of the spray tower 1 and connected to the first infusion tube 11 . A first valve 15 is provided on the third infusion tube 14 . A second valve 16 is located between the third infusion tube 14 and the liquid storage tank 10 .

[0043] In this embodiment 3, the liquid storage tank 10 stores washing liquid, and the liquid infusion pump 12 pumps the washing liquid to the spray pipe 28. The washing liquid washes the tail gas and then flows to the bottom of the spray tower. The washing liquid used in the spray tower 1 can be put into use again through the action of the liquid infusion pump 12, so that the overall amount of washing liquid used can be reduced.

[0044] A liquid discharge pump 29 is connected to the bottom of the spray tower 1 . When the washing liquid at the bottom of the spray tower 1 cannot be put into use again, it is discharged from the spray tower 1 through the liquid discharge pump 29 .

[0045] Example 4

[0046] like Figure 1-8As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0047] The filler bottom layer 5 and the filler expansion layer 6 each include a plurality of filler units 8 . The filler unit 8 includes a filler support frame 17 and a plurality of filler rings 18 coaxially disposed in the filler support frame 17 .

[0048] In this embodiment 4, the diameter of the filling ring 18 gradually increases from the axis of the filling support frame 17 to the inner wall of the filling support frame 17. During installation, the filling ring 18 is placed and filled in the filling support frame 17. The connection between the filling support frame 17 and the filling ring 18 is a detachable connection. In this way, the filling unit 8 is a split structure, which reduces the difficulty of manufacturing the filling unit 8.

[0049] The filler bottom layer 5 and the filler expansion layer 6 are both formed by stacking a plurality of filler units 8 in an offset manner. The structures of the plurality of filler units 8 constituting the filler bottom layer 5 are as follows: Figure 2 As shown, the filler support frame 17 of the filler unit 8 is filled with filler rings 18. The structure of two of the filler units 8 constituting the filler expansion layer 6 is as follows: Figure 7-8 As shown, the filling support frame 17 is not fully filled with filling rings 18 , and the filling rings 18 filled on the stacked filling units 8 in the filling expansion layer 6 gradually decrease in the direction from the bottom of the filling expansion layer 6 to the top of the filling expansion layer 6 .

[0050] Example 5

[0051] like Figure 1-8 As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0052] The filler bottom layer 5 and the filler expansion layer 6 each include a plurality of filler units 8 . The filler unit 8 includes a filler support frame 17 and a plurality of filler rings 18 coaxially disposed in the filler support frame 17 .

[0053] A support rod 19 for supporting the filling ring 18 is provided in the filler support frame 17 .

[0054] Example 6

[0055] like Figure 1-8 As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0056] The filler bottom layer 5 and the filler expansion layer 6 each include a plurality of filler units 8 . The filler unit 8 includes a filler support frame 17 and a plurality of filler rings 18 coaxially disposed in the filler support frame 17 .

[0057] A plurality of first convex strips 20 are evenly distributed on the inner wall of the filler support frame 17 .

[0058] In this embodiment 6, when the biodiesel exhaust gas rises, the first convex strip 20 is used to divert the exhaust gas, making the exhaust gas more dispersed, which is beneficial for the contact between the exhaust gas and the washing liquid. At the same time, the first convex strip 20 increases the specific surface area of ​​the filler support frame 17 and improves the contact rate between the exhaust gas and the washing liquid.

[0059] Example 7

[0060] like Figure 1-8 As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0061] The filler bottom layer 5 and the filler expansion layer 6 each include a plurality of filler units 8 . The filler unit 8 includes a filler support frame 17 and a plurality of filler rings 18 coaxially disposed in the filler support frame 17 .

[0062] A plurality of second convex strips 21 are evenly distributed on the inner wall of the filling ring 18 .

[0063] In this embodiment 7, when the biodiesel exhaust gas rises, the second convex strips 21 are used to divert the exhaust gas, making the exhaust gas more dispersed, which is beneficial for the contact between the exhaust gas and the washing liquid. At the same time, the second convex strips 21 increase the specific surface area of ​​the filling ring 18 and improve the contact rate between the exhaust gas and the washing liquid.

[0064] Example 8

[0065] like Figure 1-8 As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0066] It also includes an air intake mechanism, which includes a cooling box 23 and an air intake pipe 22 connected from the exhaust gas exhaust device of the biodiesel production system and connected to the spray tower 1. The air intake pipe 22 is provided with a spiral pipe section 24, which is located in the coolant of the cooling box 23.

[0067] In this embodiment 8, cooling water is installed in the cooling box 23, and the cooling water is used to properly cool the exhaust gas in the intake pipe 22 to reduce the rising speed of the exhaust gas in the spray tower 1, which can prolong the contact time between the exhaust gas and the washing liquid, and is conducive to the full mixing of the washing liquid and the exhaust gas. The spiral pipe section 24 can prolong the cooling time of the exhaust gas in the cooling box 23 to cool the exhaust gas to a suitable temperature.

[0068] Example 9

[0069] like Figure 1-8 As shown, the utility model provides a biodiesel exhaust washing device, comprising a spray tower 1 connected to the exhaust exhaust device of the biodiesel production system, and a washing mechanism arranged in the spray tower 1; the washing mechanism comprises a packing mechanism 3 and a spray mechanism 4 which are sequentially arranged in the spray tower 1 along the air flow direction in the spray tower 1; the packing mechanism 3 comprises a packing bottom layer 5 arranged in the spray tower 1, and a packing amplification layer 6 located at the top of the packing bottom layer 5, an amplification cavity 7 is formed between the packing amplification layer 6 and the packing bottom layer 5, and the cavity wall of the amplification cavity 7 gradually tilts upward along the direction from the top of the packing bottom layer 5 to the inner wall of the spray tower 1.

[0070] The top of the spray tower 1 is connected to a gas discharge pipe 25 , on which a third valve 26 and a fan 27 are arranged in sequence along the air flow direction; there are two washing mechanisms, which are distributed in the spray tower 1 in upper and lower layers.

[0071] In this embodiment 9, the fan is used to increase the rising force of the exhaust gas in the spray tower 1 to ensure that the exhaust gas rises normally. There are two washing mechanisms in the spray tower 1, and they are distributed up and down in the spray tower 1. In this way, after the washing mechanism located at the lower position washes the exhaust gas, the exhaust gas continues to be discharged upward to the washing mechanism located at the upper position. The washing mechanism located at the upper position further washes the exhaust gas, which can enhance the exhaust gas washing effect.

[0072] The exhaust gas exhaust device, infusion pump 12, fan 27 and drainage pump 29 of the biodiesel production system used in the utility model are all existing known equipment and can be directly purchased and used on the market. The structure, circuit, and control principle of the exhaust gas exhaust device, infusion pump 12, fan 27 and drainage pump 29 of the biodiesel production system are all existing known technologies. Therefore, the structure, circuit, and control principle of the exhaust gas exhaust device, infusion pump 12, fan 27 and drainage pump 29 of the biodiesel production system are no longer repeated here.

[0073] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, rather than limiting it, and certainly not limiting the patent scope of the present invention; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention; that is to say, any changes or embellishments made to the main design concept and spirit of the present invention that have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention; in addition, the direct or indirect application of the technical solution of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A biodiesel tail gas scrubbing device, characterized in that: The invention comprises a spray tower (1) connected to an exhaust gas discharge device of a biodiesel production system, and a washing mechanism arranged in the spray tower (1); the washing mechanism comprises a packing mechanism (3) and a spray mechanism (4) arranged in sequence in the spray tower (1) along the air flow direction in the spray tower (1); the packing mechanism (3) comprises a packing bottom layer (5) arranged in the spray tower (1), and a packing amplification layer (6) located at the top of the packing bottom layer (5); an amplification cavity (7) is formed between the packing amplification layer (6) and the packing bottom layer (5); the cavity wall of the amplification cavity (7) is gradually inclined upward in the direction from the top of the packing bottom layer (5) to the inner wall of the spray tower (1).

2. A biodiesel tail gas scrubbing device according to claim 1, characterized in that: The spray mechanism (4) comprises a spray pipe (28) arranged in the spray tower (1) and located above the filler amplification layer (6), and a plurality of spray heads (9) arranged on the spray pipe (28); the spray surface of the spray head (9) is located in the amplification chamber (7), and a liquid infusion mechanism connected to the spray pipe (28) is arranged outside the spray tower (1).

3. A biodiesel tail gas scrubbing device according to claim 2, characterized in that: The infusion mechanism comprises a liquid storage tank (10) arranged outside the spray tower (1), a first liquid infusion tube (11) connected from the liquid storage tank (10), an infusion pump (12) connected from the first liquid infusion tube (11), and a second liquid infusion tube (13) connected from the infusion pump (12) and connected to the spray pipe (28); a second valve (16) is provided on the first liquid infusion tube (11).

4. A biodiesel tail gas scrubbing device according to claim 3, characterized in that: The infusion mechanism also includes a third infusion pipe (14) connected from the bottom of the spray tower (1) and connected to the first infusion pipe (11); a first valve (15) is provided on the third infusion pipe (14); and a second valve (16) is located between the third infusion pipe (14) and the liquid storage tank (10).

5. A biodiesel tail gas scrubbing device according to claim 1, characterized in that: The filler bottom layer (5) and the filler expansion layer (6) both include a plurality of filler units (8), and the filler units (8) include a filler support frame (17) and a plurality of filler rings (18) coaxially arranged in the filler support frame (17).

6. A biodiesel tail gas scrubbing device according to claim 5, characterized in that: A support rod (19) for supporting the filling ring (18) is arranged in the filling support frame (17).

7. A biodiesel tail gas scrubbing device according to claim 5, characterized in that: A plurality of first convex strips (20) are evenly distributed on the inner wall of the filler support frame (17).

8. A biodiesel tail gas scrubbing device according to claim 5, characterized in that: A plurality of second convex strips (21) are evenly distributed on the inner wall of the filling ring (18).

9. The biodiesel tail gas scrubbing device according to claim 1, characterized in that: The invention also comprises an air intake mechanism, which comprises a cooling box (23) and an air intake pipe (22) connected from an exhaust gas discharge device of a biodiesel production system and connected to the spray tower (1); a spiral pipe section (24) is provided on the air intake pipe (22); and the spiral pipe section (24) is located in the coolant of the cooling box (23).

10. The biodiesel tail gas scrubbing device according to claim 1, characterized in that: The top of the spray tower (1) is connected to a gas discharge pipe (25), and a third valve (26) and a fan (27) are sequentially arranged on the gas discharge pipe (25) along the gas flow direction; there are two washing mechanisms, which are distributed in the spray tower (1) in upper and lower layers.

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