Amino acid fermentation tail gas treatment device

Abstract

The utility model discloses an amino acid fermentation tail gas treatment device, which relates to the technical field of amino acid fermentation and comprises a fermentation pipe, the fermentation pipe is fixedly connected with a pretreatment filtering tank through an inverted U-shaped exhaust pipe, and the bottom end of the pretreatment filtering tank is fixedly connected with a chemical absorption tank through an air inlet pipe. The top end of the chemical absorption tank is fixedly connected with an activated carbon treatment box through a pipeline, and the inner wall of the chemical absorption tank is fixedly connected with a first ring pipe and a second ring pipe. Through the unique sand clock type flow guide pipe and the design of the filter screens with different pore diameters in the pretreatment filter tank, dust in tail gas is efficiently filtered in a classified mode according to the aerodynamic principle, it is ensured that more than 90% of particles with the specific size larger than 10 micrometers are intercepted, and follow-up equipment pipelines are effectively prevented from being blocked and abraded. And meanwhile, the chemical absorption tank creatively adopts a mode of combining a double-layer ring pipe inclined spray head and a rotary spray head, so that the alkaline absorbent is in full contact with the tail gas.

Description

Technical Field

[0001] This utility model relates to the field of amino acid fermentation technology, specifically to an amino acid fermentation tail gas treatment device. Background Technology

[0002] In traditional amino acid fermentation tail gas treatment technology, the chemical absorption stage mostly employs a simple and direct static spraying method to bring the absorbent into contact with the tail gas. Typically, fixed nozzles are installed at the top of the absorption tank or at a specific location, and the alkaline absorbent is transported to the nozzles through pipelines and sprayed vertically downwards. This method has several drawbacks. Firstly, the absorbent droplets sprayed from the static nozzles are relatively concentrated, resulting in uneven mixing with the tail gas rising at a certain velocity. This leads to some tail gas not fully contacting the absorbent, making it difficult to improve the absorption efficiency of acidic gases and failing to meet increasingly stringent environmental emission standards. Secondly, to compensate for the uneven mixing problem, some processes attempt to add additional stirring equipment or forced rotation devices to try to distribute the absorbent more widely within the absorption tank and mix it more thoroughly with the tail gas. However, these devices all require additional electrical energy to operate, significantly increasing the operating cost of tail gas treatment. Furthermore, the complex equipment structure increases maintenance difficulty and the risk of failure. Utility Model Content

[0003] The purpose of this invention is to provide an amino acid fermentation tail gas treatment device to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] An amino acid fermentation tail gas treatment device includes a fermentation tube, a pretreatment filter tank fixedly connected to the fermentation tube via an inverted U-shaped exhaust pipe, a chemical absorption tank fixedly connected to the bottom end of the pretreatment filter tank via an air inlet pipe, and an activated carbon treatment box fixedly connected to the top end of the chemical absorption tank via a pipe.

[0006] The inner wall of the chemical absorption tank is fixedly connected with a first ring pipe and a second ring pipe, the second ring pipe is located below the first ring pipe, and the upper surfaces of the first ring pipe and the second ring pipe are fixedly connected with angled nozzles.

[0007] The chemical absorption tank has a rotating spray head at the top of its inner wall. A placement tube is rotatably connected to the top of the rotating spray head. A receiving fan blade is movably connected to the inner wall of the placement tube. A shaft is fixedly connected to one end of the receiving fan blade. A sealing cover is rotatably connected to the top of the shaft. The bottom end of the shaft is fixedly connected to the top of the rotating spray head.

[0008] A further improvement of the present invention is that: the bottom of the rotating spray head is provided with a spray hole, the spray hole is connected to the placement tube, a water supply pipe is fixedly connected to the back of the placement tube, and the outer wall of the sealing cover is fixedly connected to the inner wall of the chemical absorption tank by a mounting rod.

[0009] A further improvement of this utility model is that: a cover is fixedly connected to the top of the chemical absorption tank, and a drain pipe is fixedly connected to the outer wall of the chemical absorption tank near the bottom.

[0010] A further improvement of this utility model is that: an hourglass-shaped guide tube is fixedly connected to the inner wall of the pretreatment filter tank, and filter screens are provided at both ends of the bottom of the hourglass-shaped guide tube, and an internal filter screen is fixedly connected to the inner wall of the hourglass-shaped guide tube.

[0011] A further improvement of this utility model is that a control valve is fixedly connected to the outer wall of the inverted U-shaped exhaust pipe.

[0012] A further improvement of this utility model is that: the top of the activated carbon treatment box is fixedly connected to the treatment box exhaust pipe, and the interior of the activated carbon treatment box is filled with activated carbon particles.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0014] 1. This utility model provides an amino acid fermentation tail gas treatment device. Through a unique hourglass-shaped guide pipe and filter screens of different pore sizes in the pretreatment filter tank, it achieves highly efficient graded filtration of dust in the tail gas based on aerodynamic principles, ensuring that over 90% of particles larger than 10 micrometers are intercepted, effectively preventing blockage and wear in subsequent equipment pipelines. Simultaneously, the chemical absorption tank innovatively employs a combination of double-layer ring pipe oblique nozzles and rotating spray nozzles, allowing the alkaline absorbent to fully contact the tail gas. This initial reaction followed by a counter-current flushing and secondary mixing, combined with the deep adsorption of the activated carbon treatment box, results in multi-stage synergistic operation, greatly improving the purification effect on acidic gases and residual pollutants in the tail gas, ensuring that the tail gas meets emission standards.

[0015] 2. This utility model provides an amino acid fermentation tail gas treatment device. The linkage design of the fan blades and rotating spray head in the chemical absorption tank cleverly utilizes the water flow power of the water supply pipe to transport the alkaline absorbent, which drives the rotating spray. This not only further enhances the mixing uniformity of the absorbent and the tail gas and improves the absorption efficiency, but also eliminates the need for additional energy consumption to drive the stirring or rotating equipment compared to the traditional static spraying method. It achieves energy saving and consumption reduction while efficiently purifying the tail gas, thus reducing operating costs. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the structural details of the chemical absorption tank of this utility model;

[0018] Figure 3 This is a schematic diagram of the rotating spray head structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of this utility model;

[0020] Figure 5 This is a schematic diagram showing the structural details of the pretreatment filter tank of this utility model.

[0021] In the diagram: 1. Fermentation tube; 2. Inverted U-shaped exhaust pipe; 3. Pretreatment filter tank; 4. Chemical absorption tank; 5. Activated carbon treatment box; 6. Treatment box exhaust pipe; 7. Control valve; 8. First ring pipe; 9. Second ring pipe; 10. Angled nozzle; 11. Air inlet pipe; 12. Drain pipe; 13. Cover; 14. Rotating spray nozzle; 15. Placement pipe; 16. Receiving fan blade; 17. Sealing cover; 18. Filter screen; 19. Hourglass-shaped guide pipe; 20. Built-in filter screen; 21. Water delivery pipe. Detailed Implementation

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will be further described in detail below with reference to embodiments:

[0024] Example 1

[0025] like Figure 1-5 As shown, this utility model provides an amino acid fermentation tail gas treatment device, including a fermentation pipe 1, a pretreatment filter tank 3 fixedly connected to the fermentation pipe 1 through an inverted U-shaped exhaust pipe 2, a chemical absorption tank 4 fixedly connected to the bottom end of the pretreatment filter tank 3 through an air inlet pipe 11, and an activated carbon treatment box 5 fixedly connected to the top end of the chemical absorption tank 4 through a pipe.

[0026] The inner wall of the chemical absorption tank 4 is fixedly connected with a first ring pipe 8 and a second ring pipe 9. The second ring pipe 9 is located below the first ring pipe 8. The upper surfaces of the first ring pipe 8 and the second ring pipe 9 are both fixedly connected with angled nozzles 10.

[0027] A rotating spray head 14 is provided on the top of the inner wall of the chemical absorption tank 4. A placement tube 15 is rotatably connected to the top of the rotating spray head 14. A receiving fan blade 16 is movably connected to the inner wall of the placement tube 15. A shaft is fixedly connected to one end of the receiving fan blade 16. A sealing cover 17 is rotatably connected to the top of the shaft. The bottom end of the shaft is fixedly connected to the top of the rotating spray head 14.

[0028] The bottom of the rotating spray head 14 has a spray hole, which is connected to the placement tube 15. A water supply pipe 21 is fixedly connected to the back of the placement tube 15. The outer wall of the sealing cover 17 is fixedly connected to the inner wall of the chemical absorption tank 4 by a mounting rod.

[0029] Example 2

[0030] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, a cap 13 is fixedly connected to the top of the chemical absorption tank 4, and a drain pipe 12 is fixedly connected to the outer wall of the chemical absorption tank 4 near the bottom.

[0031] The inner wall of the pretreatment filter tank 3 is fixedly connected to an hourglass-shaped guide pipe 19. Both ends of the bottom of the hourglass-shaped guide pipe 19 are provided with filter screens 18, and the inner wall of the hourglass-shaped guide pipe 19 is fixedly connected to an internal filter screen 20.

[0032] The hourglass-shaped guide pipe 19 effectively guides the flow of exhaust gas. When the amino acid fermentation exhaust gas enters the pretreatment filter tank 3 from the inverted U-shaped exhaust pipe 2, the exhaust gas flows along the contour of the hourglass-shaped guide pipe 19. The airflow naturally undergoes acceleration, deceleration, and reversal at the point where the pipe diameter changes. According to aerodynamic principles, this unstable airflow state helps to dislodge dust particles in the exhaust gas from the main airflow, making it easier for them to impact the pipe wall, thus creating favorable conditions for subsequent filtration steps.

[0033] The hourglass-shaped guide pipe 19 is equipped with filter screens 18 of different pore sizes at its upper and lower ends, working in perfect harmony. The upper filter screen has a relatively large pore size, which can initially intercept larger dust particles in the exhaust gas, thus providing preliminary purification. As the exhaust gas continues to flow downwards, the pipe diameter gradually narrows, and the built-in filter screen 20 begins to filter, with an even smaller pore size, precisely capturing the fine dust particles that remain after the initial filtration. The lower filter screen has an even smaller pore size, further enhancing its ability to trap fine dust, forming a complete dust grading filtration system. This layered approach ensures that more than 90% of dust particles larger than a certain size are effectively removed, minimizing the risk of dust entering subsequent equipment such as the chemical absorption tank 4, preventing pipe blockage, wear, and contamination of the absorbent, and ensuring the stable and efficient operation of the entire exhaust gas treatment device.

[0034] A control valve 7 is fixedly connected to the outer wall of the inverted U-shaped exhaust pipe 2.

[0035] The top of the activated carbon treatment box 5 is fixedly connected to the treatment box exhaust pipe 6, and the interior of the activated carbon treatment box 5 is filled with activated carbon granules.

[0036] The working principle of this amino acid fermentation tail gas treatment device will be explained in detail below.

[0037] like Figure 1-5 As shown, when the amino acid fermentation exhaust gas enters the pretreatment filter tank 3 through the inverted U-shaped exhaust pipe 2, it first undergoes dust filtration through filter screen 18. The filter screen has a relatively large pore size, capable of intercepting larger dust particles in the exhaust gas. The pore size of filter screen 18, located above the built-in filter screen 20, is larger than that of the built-in filter screen 20, while the pore size of filter screen 18, located below the built-in filter screen 20, is smaller. As the exhaust gas is conveyed downwards, the pore size gradually decreases, achieving graded filtration of increasingly finer dust particles. This structural design is based on aerodynamic principles, utilizing multiple changes in airflow direction between the filter screens to cause dust particles to be trapped by inertial impact on the filter surface, ensuring that over 90% of particles larger than 10 micrometers are effectively removed, preventing pipe blockage and wear in subsequent treatment equipment.

[0038] The filtered exhaust gas is then transported to the chemical absorption tank 4 through the inlet pipe 11. At this point, the water supply pipe 21 is connected to an alkaline absorbent delivery device, which delivers the alkaline absorbent to the first ring pipe 8 and the second ring pipe 9 via pipelines. The absorbent is then sprayed out through angled nozzles 10. Because the angled nozzles 10 are angled upwards, the sprayed alkaline absorbent moves along a parabolic path inside the chemical absorption tank 4. During the upward phase, the alkaline absorbent makes initial contact with the exhaust gas, and during this contact, acidic gases in the exhaust gas, such as sulfur dioxide and nitrogen oxides, react chemically with calcium hydroxide. Subsequently, the alkaline absorbent begins to descend under gravity, counter-currently mixing with the upward-flowing exhaust gas.

[0039] Another branch pipe of the water supply pipe 21 is connected to the placement pipe 15. When the alkaline absorbent in the water supply pipe 21 begins to be transported, it will impact the receiving fan blade 16, causing the receiving fan blade 16 to start driving the rotating spray head 14 to rotate, thereby spraying the alkaline absorbent in the placement pipe 15 in a rotating state, further improving the mixing effect with the exhaust gas.

[0040] The exhaust gas treated by the chemical absorption tank 4 is then transported through pipelines to the activated carbon treatment tank 5. When the exhaust gas passes through a fixed-bed adsorber filled with high-quality activated carbon with a high iodine value at a low flow rate, the residual pollutant molecules in the exhaust gas are adsorbed onto the pore surface of the activated carbon under the action of van der Waals forces. Due to the large specific surface area of ​​the activated carbon, it can provide sufficient adsorption sites, so that the adsorption and removal rate of the remaining pollutants reaches more than 95%, further purifying the exhaust gas and ensuring emission quality.

[0041] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An amino acid fermentation off-gas treatment apparatus comprising a fermentation tube (1), characterized by: The fermentation tube (1) is fixedly connected to a pretreatment filter tank (3) via an inverted U-shaped exhaust pipe (2). The bottom end of the pretreatment filter tank (3) is fixedly connected to a chemical absorption tank (4) via an air inlet pipe (11). The top end of the chemical absorption tank (4) is fixedly connected to an activated carbon treatment box (5) via a pipe. The inner wall of the chemical absorption tank (4) is fixedly connected with a first ring pipe (8) and a second ring pipe (9). The second ring pipe (9) is located below the first ring pipe (8). The upper surfaces of the first ring pipe (8) and the second ring pipe (9) are both fixedly connected with oblique nozzles (10). The chemical absorption tank (4) has a rotating spray head (14) at the top of its inner wall. The top of the rotating spray head (14) is rotatably connected to a placement tube (15). The inner wall of the placement tube (15) is movably connected to a receiving fan blade (16). One end of the receiving fan blade (16) is fixedly connected to a shaft. The top of the shaft is rotatably connected to a sealing cover (17). The bottom end of the shaft is fixedly connected to the top of the rotating spray head (14).

2. The amino acid fermentation off-gas treatment device according to claim 1, characterized by: The rotating spray nozzle (14) has a spray hole at the bottom, which is connected to the placement tube (15). A water supply pipe (21) is fixedly connected to the back of the placement tube (15). The outer wall of the sealing cover (17) is fixedly connected to the inner wall of the chemical absorption tank (4) by a mounting rod.

3. The amino acid fermentation off-gas treatment device according to claim 1, characterized by: The top of the chemical absorption tank (4) is fixedly connected to a cover (13), and the outer wall of the chemical absorption tank (4) near the bottom is fixedly connected to a drain pipe (12).

4. The apparatus for treating the fermentation off-gas of amino acid according to claim 1, wherein: The inner wall of the pretreatment filter tank (3) is fixedly connected to an hourglass-shaped guide pipe (19), and both ends of the bottom of the hourglass-shaped guide pipe (19) are provided with filter screens (18). The inner wall of the hourglass-shaped guide pipe (19) is fixedly connected to an internal filter screen (20).

5. The amino acid fermentation off-gas treatment device according to claim 1, characterized by: A control valve (7) is fixedly connected to the outer wall of the inverted U-shaped exhaust pipe (2).

6. The amino acid fermentation off-gas treatment device according to claim 1, characterized by: The top of the activated carbon treatment box (5) is fixedly connected to the treatment box exhaust pipe (6), and the interior of the activated carbon treatment box (5) is filled with activated carbon particles.

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