A secondary steam treatment device for removing acid from amino acid hydrolyzate

Abstract

The utility model discloses a secondary steam treatment device for removing acid from amino acid hydrolyzate, comprising a secondary steam delivery pipe, a gas-liquid separation tank, a non-condensable gas delivery pipe, a compressor and a recycled gas pipe, wherein the output end of the secondary steam delivery pipe is connected to the gas-liquid separation tank, the input end of the non-condensable gas delivery pipe is connected to the top of the gas-liquid separation tank, the output end is connected to the compressor, the recycled gas pipe input end is connected to the compressor, a condensing tank is installed on the secondary steam delivery pipe, and a U-shaped pipe is installed on the non-condensable gas delivery pipe. The utility model not only improves the gas-liquid separation effect of the secondary steam, but also increases the service life of the compressor and improves the energy utilization efficiency.

Description

Technical Field

[0001] The utility model relates to amino acid production, and more specifically to a secondary steam treatment device for removing acid from amino acid hydrolyzate. Background Art

[0002] Amino acids are organic compounds containing alkaline amino groups and acidic carboxyl groups. They are compounds formed when the hydrogen atoms on the carbon atoms of carboxylic acids are replaced by amino groups. Amino acids need to be hydrolyzed during the preparation process. In order to reduce the acid concentration inside the amino acid hydrolyzate, the amino acid hydrolyzate needs to be treated with mechanical energy to drive out the acid.

[0003] CN202211369446.2 discloses an acid-removing process for amino acid hydrolyzate using indirect MVR evaporation, in which the secondary steam coming out of the evaporator is transported to a gas-liquid separation tank through a pipeline, and enters the gas-liquid separation tank from the bottom. In the gas-liquid separation tank, the acidic liquid and gas in the secondary steam are separated, so that the liquid falls due to gravity and the gas overflows from the top of the gas-liquid separation tank, thereby removing the acidic liquid droplets entrained in the secondary steam. The acidic liquid overflowing from the top of the gas-liquid separation tank is transported to a compressor for compression, and then transported to the shell side of a heat exchanger as heating steam for use as a heat source for the evaporator.

[0004] Although the above method realizes the energy cycle in the amino acid production process well, it has the following shortcomings: 1. The secondary steam gas-liquid separation effect still needs to be improved. 2. The service life of the compressor is short. 3. Energy utilization can be further improved. Utility Model Content

[0005] In view of the above problems, the utility model provides an amino acid hydrolyzate acid-removing secondary steam treatment device, which not only improves the secondary steam gas-liquid separation effect, but also increases the service life of the compressor and improves the energy utilization efficiency.

[0006] A secondary steam treatment device for removing acid from amino acid hydrolyzate comprises a secondary steam delivery pipe, a gas-liquid separation tank, a non-condensable gas delivery pipe, a compressor and a recycled gas pipe, wherein the output end of the secondary steam delivery pipe is connected to the gas-liquid separation tank, the input end of the non-condensable gas delivery pipe is connected to the top of the gas-liquid separation tank, the output end is connected to the compressor, the input end of the recycled gas pipe is connected to the compressor, a condensing tank is installed on the secondary steam delivery pipe, and a U-shaped pipe is installed on the non-condensable gas delivery pipe.

[0007] Optionally, a liquid return pipe is connected to the middle position of the bottom of the U-shaped tube, and a normally closed valve is installed on the liquid return pipe.

[0008] Optionally, the condensation tank is a heat exchanger.

[0009] Optionally, the gas-liquid separation tank comprises a gas-liquid separation tank body, the gas-liquid separation tank body encloses a containing cavity, the containing cavity is divided into an upper middle cavity and a lower cavity, the lower cavity is used for liquid retention during operation, a liquid outlet for discharging liquid is provided at the bottom of the gas-liquid separation tank body, an outlet for allowing the input end of the non-condensable gas delivery pipe to pass through is provided at the top, an inlet for allowing the output end of the secondary steam delivery pipe to pass through is also provided on the gas-liquid separation tank body, a first separation device is installed in the upper middle cavity, the first separation device comprises a first separation plate, a first separation tank and a first liquid pipe, the first separation The tank includes a first outer tank and a first inner tank. The first separation plate is connected to the wall of the gas-liquid separation tank body. A first overflow hole is provided on about half of the area of ​​the first separation plate, and a first mounting position is provided on the other half of the area. A first tube hole is provided on the first mounting position. The bottom of the first inner tank is installed on the bottom of the first outer tank. The tank wall of the first inner tank is higher than the tank wall of the first outer tank. A first liquid leakage hole is provided on the bottom of the first outer tank. The first liquid pipe passes through the first tube hole and is connected to the first outer tank through the first liquid leakage hole. The output end of the secondary steam delivery pipe is located in the first inner tank.

[0010] Optionally, the upper middle cavity is also equipped with a second separation device, which is located below the first separation device. The second separation device includes a second separation plate, a second separation groove and a second liquid pipe. The second separation groove includes a second outer groove and a second inner groove. The second separation plate is connected to the wall of the gas-liquid separation tank body. A second overflow hole is provided on about half of the area of ​​the second separation plate, and a second mounting position is provided on the other half of the area. A second tube hole is provided on the second mounting position. The bottom of the second inner groove is installed on the bottom of the second outer groove. The groove wall of the second inner groove is higher than the groove wall of the second outer groove. A second leakage hole is provided on the bottom of the second outer groove. The second liquid pipe passes through the second tube hole and is connected to the second outer groove through the second leakage hole. The output end of the first liquid pipe is located in the second inner groove.

[0011] Optionally, the upper middle cavity is also equipped with a third separation device, which is located below the second separation device. The third separation device includes at least one third separation plate, which is connected to the wall of the gas-liquid separation tank body. A third overflow hole and a second tube hole are opened on the third separation plate, and the second tube hole is used for the second liquid pipe to pass through.

[0012] Optionally, a partition is installed above the first separation device, and the partition is connected to the top cover.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model not only improves the secondary steam gas-liquid separation effect, but also prolongs the service life of the compressor and improves the energy utilization efficiency by adding a condensing tank and a U-shaped tube and improving the gas-liquid separation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in 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 some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 It is a schematic diagram of the overall structure of the secondary steam treatment device for removing acid from amino acid hydrolyzate;

[0017] Figure 2 It is a structural schematic diagram of the gas-liquid separation tank of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the first separation plate of the utility model;

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

[0020] Figure 5 It is a schematic structural diagram of the third separation plate of the utility model.

[0021] Explanation of the reference numerals: 1. secondary steam delivery pipe, 2. gas-liquid separation tank, 21. gas-liquid separation tank body, 22. lower cavity, 23. liquid outlet, 24. outlet, 25. inlet, 261. first separation plate, 2611. first overflow hole, 2612. first mounting position, 2613. first tube hole, 262. first outer groove, 263. first inner groove, 264. first liquid pipe, 271. second separation plate, 2711. second overflow hole, 2712. second mounting position, 2713. second tube hole, 272. second outer groove, 273. second inner groove, 274. second liquid pipe, 28. third separation plate, 281. third overflow hole, 282. third tube hole, 29. partition, 3. compressor, 4. non-condensable gas delivery pipe, 5. recycled gas pipe, 6. condenser, 7. U-shaped pipe, 8. liquid return pipe, 9. normally closed valve. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0024] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0027] In CN202211369446.2, the secondary steam is formed by the acidic liquid in the evaporator being vaporized by high-temperature steam. Therefore, the temperature of the secondary steam coming out of the evaporator is relatively high. A part of the gas in the secondary steam can be converted into liquid when the temperature is lowered. Therefore, please refer to Figure 1 , Figure 1 The utility model is a schematic diagram of the overall structure of an amino acid hydrolyzate acid removal secondary steam treatment device.

[0028] A secondary steam treatment device for removing acid from amino acid hydrolyzate comprises a secondary steam delivery pipe 1, a gas-liquid separation tank 2, a non-condensable gas delivery pipe 4, a compressor 3 and a recycling gas pipe 5. The output end of the secondary steam delivery pipe 1 is connected to the gas-liquid separation tank 2, the input end of the non-condensable gas delivery pipe 4 is connected to the top of the gas-liquid separation tank 2, and the output end is connected to the compressor 3. The input end of the recycling gas pipe 5 is connected to the compressor 3. A condensing tank 6 is installed on the secondary steam delivery pipe 1.

[0029] By installing a condenser 6 on the secondary steam delivery pipe 1, the non-non-condensable gas in the secondary steam gas is condensed and converted into liquid, thereby increasing the liquid content in the gas-liquid mixed fluid, preventing the condensable gas in the secondary steam gas, especially the acidic gas, from entering the subsequent compressor 3 and corroding the compressor 3, thereby increasing the service life of the compressor 3.

[0030] It should be understood by those skilled in the art that the condensation tank 6 can be a heat exchanger, which can be purchased from the market or homemade, as long as the condensable gas in the secondary steam can be converted into liquid. No particular limitation is made here, and those skilled in the art can choose according to their needs.

[0031] In one or more specific implementations of this embodiment, in order to better achieve gas-liquid separation, please refer to Figure 2-Figure 3 , Figure 2 This is a schematic diagram of the structure of the gas-liquid separation tank of the utility model. Figure 3 This is a schematic diagram of the structure of the first separation plate of the utility model. Figure 2 The gas-liquid separation tank 2 includes a gas-liquid separation tank body 21, which is surrounded by a receiving chamber, and the receiving chamber is divided into an upper middle chamber and a lower chamber 22. The lower chamber 22 is used for liquid retention during operation. A liquid outlet 23 for discharging liquid is provided at the bottom of the gas-liquid separation tank body 21, and an outlet 24 for allowing the input end of the non-condensable gas delivery pipe 4 to pass through is provided at the top. An inlet 25 for allowing the output end of the secondary steam delivery pipe 1 to pass through is also provided on the gas-liquid separation tank body 21. The upper middle chamber is equipped with a first separation device, and the first separation device includes a first separation plate 261, a first separation tank and a first liquid pipe 264. The first separation tank includes a first outer tank 262 and a first inner tank 263. The first separation plate 261 is connected to the wall of the gas-liquid separation tank body 21, and a first overflow hole 2611 is provided on about half of the area of ​​the first separation plate 261, and a first mounting position 2612 is provided on the other half of the area. The first mounting position 2612 is provided with a first tube hole 2613, and the bottom of the first inner groove 263 is installed on the bottom of the first outer groove 262. The groove wall of the first inner groove 263 is higher than the groove wall of the first outer groove 262, and the groove bottom of the first outer groove 262 is provided with a first leakage hole. The first liquid pipe 264 passes through the first tube hole 2613 and is connected to the first outer groove 262 through the first leakage hole. The end of the output end of the secondary steam delivery pipe 1 is located in the first inner groove 263.

[0032] After the first separation device is set, when the mixed fluid from the end of the output end of the secondary steam delivery pipe 1 flows into the first inner tank 263, the gas overflows, and the liquid (still with some gas) sinks in the first inner tank 263. When staying in the first inner tank 263, the gas further overflows. When the liquid level of the first inner tank 263 rises to be flush with the top of the wall of the first inner tank 263, it overflows from the top of the wall of the first inner tank 263, flows down along the outer wall of the first inner tank 263 into the first outer tank 262, and further performs gas-liquid separation in the first outer tank 262. The gas from below the first separation plate 261 continues to overflow from the first overflow hole 2611, and the gas falls back into the liquid below under the obstruction of the first separation plate 261.

[0033] In one or more specific implementations of this embodiment, in order to obtain a better separation effect, please refer to Figure 4 The upper middle cavity is also equipped with a second separation device, which is located below the first separation device. The second separation device includes a second separation plate 271, a second separation groove and a second liquid pipe 274. The second separation groove includes a second outer groove 272 and a second inner groove 273. The second separation plate 271 is connected to the wall of the gas-liquid separation tank body 21. A second overflow hole 2711 is provided on about half of the area of ​​the second separation plate 271, and a second mounting position 2712 is provided on the other half of the area. A second tube hole 2713 is provided on the second mounting position 2712. The bottom of the second inner groove 273 is installed on the bottom of the second outer groove 272. The groove wall of the second inner groove 273 is higher than the groove wall of the second outer groove 272. A second leakage hole is provided at the bottom of the second outer groove 272. The second liquid pipe 274 passes through the second tube hole 2713 and is connected to the second outer groove 272 through the second leakage hole. The end of the output end of the first liquid pipe 264 is located in the second inner groove 273.

[0034] After the second separation device is set, when the mixed fluid from the end of the output end of the first liquid pipe 264 flows into the second inner tank 273, the gas overflows, and the liquid (with part of the gas) sinks in the second inner tank 273. When staying in the second inner tank 273, the gas further overflows. When the liquid level of the second inner tank 273 rises to be flush with the top of the wall of the second inner tank 273, it overflows from the top of the wall of the second inner tank 273, flows down along the outer wall of the second inner tank 273 into the second outer tank 272, and further performs gas-liquid separation in the second outer tank 272. The gas from the bottom of the second separation plate 271 continues to overflow from the second overflow hole 2711, and the gas falls back into the liquid below under the obstruction of the second separation plate 271.

[0035] In one or more specific implementations of this embodiment, in order to obtain a better separation effect, please refer to Figure 5The upper middle cavity is also equipped with a third separation device, which is located below the second separation device. The third separation device includes at least one third separation plate 28, which is connected to the wall of the gas-liquid separation tank body 21. The third separation plate 28 is provided with a third overflow hole 281 and a third tube hole 282, and the third tube hole 282 is used for the second liquid pipe 274 to pass through.

[0036] In one or more specific implementations of this embodiment, in order to obtain a better separation effect, a partition 29 is installed above the first separation device. The partition 29 is connected to the top cover and is used to prevent the gas overflowing from the first separation tank from directly overflowing from the outlet 24.

[0037] In one or more specific implementations of this embodiment, in order to achieve better separation and symmetrical weight distribution in the gas-liquid separation tank, the second separation tank is installed in a staggered manner with the first separation tank.

[0038] In one or more specific implementations of the present embodiment, the connection between the first separation plate 261 and the wall of the gas-liquid separation tank body 21 may be a fixed connection or a detachable connection, which is not particularly limited herein, and those skilled in the art may select as needed; the connection between the second separation plate 271 and the wall of the gas-liquid separation tank body 21 may be a fixed connection or a detachable connection, which is not particularly limited herein, and those skilled in the art may select as needed; the connection between the third separation plate 28 and the wall of the gas-liquid separation tank body 21 may be a fixed connection or a detachable connection, which is not particularly limited herein, and those skilled in the art may select as needed; the partition 29 may be fixedly connected to the top cover or may be detachably connected, which is not particularly limited herein, and those skilled in the art may select as needed.

[0039] In one or more specific implementations of this embodiment, the end of the output end of the secondary steam delivery pipe 1 is located below the liquid level of the first inner tank 263 to prevent the outflowing mixed fluid from splashing and mixing with the overflowing gas. The end of the output end of the first liquid pipe 264 is located below the liquid level of the second inner tank 273 to prevent the outflowing fluid from splashing and mixing with the overflowing gas, and the end of the output end of the second liquid pipe 274 is located below the liquid level of the lower chamber 22 to prevent the outflowing fluid from splashing and mixing with the overflowing gas.

[0040] In one or more specific implementations of the present embodiment, a U-shaped tube 7 is installed on the non-condensable gas delivery pipe 4, and a liquid return pipe 8 is connected to the middle position of the bottom of the U-shaped tube 7, and a normally closed valve 9 is installed on the liquid return pipe 8. When the gas separated from the gas-liquid separation tank 2 flows into the non-condensable gas delivery pipe 4 and passes through the U-shaped tube 7, the extremely small amount of acid liquid entrained in the gas stays in the U-shaped tube 7, and the clean non-condensable gas continues to move forward. The normally closed valve 9 is opened regularly, and the liquid flows back from the liquid return pipe 8 to the gas-liquid separation tank 2, further improving the service life of the compressor 3.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field 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 with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A secondary steam treatment device for removing acid from amino acid hydrolyzate, comprising a secondary steam delivery pipe (1), a gas-liquid separation tank (2), a non-condensable gas delivery pipe (4), a compressor (3) and a return gas pipe (5), wherein the output end of the secondary steam delivery pipe (1) is connected to the gas-liquid separation tank (2), the input end of the non-condensable gas delivery pipe (4) is connected to the top of the gas-liquid separation tank (2), the output end is connected to the compressor (3), and the input end of the return gas pipe (5) is connected to the compressor (3), wherein the output end of the secondary steam delivery pipe (1) is connected to the compressor (3), and the input end of the return gas pipe (5) is connected to the compressor (3), characterized in that: A condenser (6) is installed on the secondary steam delivery pipe (1), and a U-shaped pipe (7) is installed on the non-condensable gas delivery pipe (4).

2. The amino acid hydrolyzate secondary steam treatment device according to claim 1, characterized in that: The middle position of the bottom of the U-shaped tube (7) is connected to a liquid return pipe (8), and a normally closed valve (9) is installed on the liquid return pipe (8).

3. The amino acid hydrolyzate secondary steam treatment device according to claim 1, characterized in that: The condensation tank (6) is a heat exchanger.

4. The amino acid hydrolyzate secondary steam treatment device according to claim 1, characterized in that: The gas-liquid separation tank (2) comprises a gas-liquid separation tank body (21), the gas-liquid separation tank body (21) enclosing a receiving chamber, the receiving chamber being divided into an upper middle chamber and a lower chamber (22), the lower chamber (22) being used for liquid retention during operation, a liquid outlet (23) for discharging liquid is provided at the bottom of the gas-liquid separation tank body (21), an outlet (24) for allowing the input end of the non-condensable gas delivery pipe (4) to pass through is provided at the top, an inlet (25) for allowing the output end of the secondary steam delivery pipe (1) to pass through is also provided on the gas-liquid separation tank body (21), a first separation device is installed in the upper middle chamber, the first separation device comprises a first separation plate (261), a first separation tank and a first liquid pipe (264), the first separation tank comprises a first outer tank (262) and a first inner tank (263), The first separation plate (261) is connected to the wall of the gas-liquid separation tank body (21); a first overflow hole (2611) is provided on approximately half of the area of ​​the first separation plate (261); a first mounting position (2612) is provided on the other half of the area; a first tube hole (2613) is provided on the first mounting position (2612); the bottom of the first inner groove (263) is mounted on the groove bottom of the first outer groove (262); the groove wall of the first inner groove (263) is higher than the groove wall of the first outer groove (262); a first liquid leakage hole is provided on the groove bottom of the first outer groove (262); a first liquid pipe (264) passes through the first tube hole (2613) and is connected to the first outer groove (262) through the first liquid leakage hole; and the output end of the secondary steam delivery pipe (1) is located in the first inner groove (263).

5. The amino acid hydrolyzate secondary steam treatment device according to claim 4, characterized in that: The upper middle cavity is also provided with a second separation device, which is located below the first separation device. The second separation device comprises a second separation plate (271), a second separation tank and a second liquid pipe (274). The second separation tank comprises a second outer tank (272) and a second inner tank (273). The second separation plate (271) is connected to the wall of the gas-liquid separation tank body (21). A second overflow hole (2711) is provided on about half of the area of ​​the second separation plate (271), and a second mounting position (2712) is provided on the other half of the area. ), a second tube hole (2713) is provided on the second mounting position (2712), the bottom of the second inner groove (273) is installed on the groove bottom of the second outer groove (272), the groove wall of the second inner groove (273) is higher than the groove wall of the second outer groove (272), a second liquid leakage hole is provided on the groove bottom of the second outer groove (272), the second liquid tube (274) passes through the second tube hole (2713) and is connected to the second outer groove (272) through the second liquid leakage hole, and the end of the output end of the first liquid tube (264) is located in the second inner groove (273).

6. The amino acid hydrolyzate secondary steam treatment device according to claim 5, characterized in that: The upper middle cavity is also provided with a third separation device, the third separation device is located below the second separation device, the third separation device comprises at least one third separation plate (28), the third separation plate (28) is connected to the wall of the gas-liquid separation tank body (21), the third separation plate (28) is provided with a third overflow hole (281) and a third tube hole (282), the third tube hole (282) is used for the second liquid pipe (274) to pass through.

7. The amino acid hydrolyzate secondary steam treatment device according to claim 6, characterized in that: A partition plate (29) is installed above the first separation device, and the partition plate (29) is connected to the top cover.

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