Saponification liquid acidification treatment device based on hydantoin hydrolysis tower steam stripping process

Abstract

The invention relates to the field of hydrolysis tower steam stripping processes, in particular to a saponification liquid acidification treatment device based on a hydantoin hydrolysis tower steam stripping process, which comprises a skirt, a skirt cylinder is arranged at the bottom of the inner wall of the skirt, the top of the skirt cylinder extends to the top of the skirt, the top of the skirt cylinder is connected with a tower body, and the tower body is connected with the skirt cylinder. The top of the tower body is connected with a first vertical pipe, and the surface of the tower body is communicated with a tower bottom steam feeding pipe. An alkali salt solution and hydantoin enter the hydrolysis tower from the top of the hydrolysis tower to react, steam with the pressure of 2.0 Mpa and the temperature of 198 DEG C directly enters the hydrolysis tower from the bottom of the hydrolysis tower and makes reverse contact with a mixture generated in the hydrolysis reaction, carbon dioxide and ammonia gas in the mixture are taken away and discharged from the tower top for cyclic utilization, the steam is directly used as steam for steam stripping to separate the carbon dioxide and the ammonia gas, and the production cost is reduced. Redundant equipment is saved, the economic cost is reduced, the stability of the device is enhanced, external interference factors are reduced, and the influence of unknown circulating water impurities is eliminated.

Description

Technical Field

[0001] The invention relates to the field of hydrolysis tower stripping technology, and in particular to a saponification liquid acidification treatment device based on the hexahydrolysis tower stripping technology. Background Art

[0002] Steam stripping is a method of steam stripping, which refers to the process of allowing wastewater to directly contact with water vapor so that the volatile toxic and harmful substances in the wastewater can diffuse into the gas phase in a certain proportion, thereby achieving the purpose of separating pollutants from the wastewater.

[0003] In the traditional hydroxyethyl ester hydrolysis process, hydroxyethyl ester undergoes alkaline hydrolysis to generate methionine salt, carbon dioxide and ammonia. In order to effectively separate and recycle these by-products, especially carbon dioxide and ammonia, a gas desorption tower is usually required for subsequent treatment. This process involves introducing the reaction mixture into the desorption tower, and through specific temperature and pressure conditions, carbon dioxide and ammonia are desorbed from the mixture, and then recycled after further treatment. However, this method not only increases the complexity of the equipment, but also requires additional operating and maintenance costs. The use of a gas desorption tower may also introduce new operating variables and potential failure points, thereby affecting the stability and reliability of the entire production system.

[0004] Therefore, we made improvements on this and proposed a saponification liquid acidification treatment device based on the Hein hydrolysis tower stripping process. Summary of the invention

[0005] The purpose of the present invention is to address the current problems of increased equipment complexity, additional operating and maintenance costs, and the use of a gas analysis tower that may introduce new operating variables and potential failure points, thereby affecting the stability and reliability of the entire production system.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides a saponification liquid acidification treatment device based on the hydroxyl hydrolysis tower stripping process to improve the above-mentioned problems.

[0007] The specific application is as follows: A saponified liquid acidification treatment device based on a hydantoin hydrolysis tower stripping process comprises a skirt, wherein a skirt cylinder is provided at the bottom of an inner wall of the skirt, the top of the skirt cylinder extends to the top of the skirt, the top of the skirt cylinder is connected to a tower body, the top of the tower body is connected to a first vertical pipe, the surface of the tower body is connected to a tower bottom steam feed pipe, the top of the first vertical pipe is connected to a second vertical pipe, the top of the second vertical pipe is connected to a third vertical pipe, the top of the third vertical pipe is connected to a tower top gas phase outlet pipe, and the surface of the skirt cylinder is connected to a skirt exhaust pipe.

[0008] As a preferred technical solution of the present application, the bottom of the tower body is connected to a tower bottom liquid phase outlet pipe, the surface of the tower bottom liquid phase outlet pipe is sleeved with a lead-out pipe, and the left side of the tower body is connected to a skirt exhaust pipe.

[0009] As a preferred technical solution of the present application, the top of the right side of the tower body is connected to a remote liquid level gauge port 1, the bottom of the right side of the tower body is connected to a remote liquid level gauge port 2, and the surface of the remote liquid level gauge port 2 is penetrated by a tower bottom remote thermometer.

[0010] As a preferred technical solution of the present application, the bottom of the left side of the tower body is connected to a tower bottom gas-phase feed pipe, and a flange cover is connected to the left side of the tower bottom gas-phase feed pipe, and a handle is connected to the surface of the flange cover, and one side of the flange cover extends to the inner cavity of the tower bottom gas-phase feed pipe and is threadedly connected to the inner wall of the tower bottom gas-phase feed pipe.

[0011] As a preferred technical solution of the present application, a nameplate is installed on the surface of the tower body, and the surface of the first vertical pipe is connected to a remote pressure gauge tube at the bottom of the tower.

[0012] As a preferred technical solution of the present application, the bottom of the skirt is connected to a base ring plate, and the surface of the skirt cylinder is inlaid with a skirt inspection window.

[0013] As a preferred technical solution of the present application, the surface of the second vertical pipe is connected to a remote pressure gauge tube in the tower, and the surface of the second vertical pipe is connected to a remote thermometer in the tower.

[0014] As a preferred technical solution of the present application, the surface of the third vertical pipe is respectively penetrated by a tower top feed pipe and a KCO addition pipe, and the bottoms of the tower top feed pipe and the K2CO3 addition pipe penetrate the third vertical pipe and extend to the inner cavity of the second vertical pipe.

[0015] As a preferred technical solution of the present application, the top of the left side of the third vertical pipe is connected to a safety valve pipe, and the top of the third vertical pipe and the rear side of the tower top gas phase outlet pipe are connected to a spare pipe.

[0016] As a preferred technical solution of the present application, a tower top remote thermometer is connected to the top of the third vertical pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: 1. In order to solve the problem that the prior art increases the complexity of equipment and requires additional operation and maintenance costs, the use of a gas analysis tower may also introduce new operating variables and potential failure points, thereby affecting the stability and reliability of the entire production system. The present application sets a skirt, a skirt exhaust pipe, a skirt cylinder, a tower body, a first vertical pipe, a tower bottom steam feed pipe, a second vertical pipe, a third vertical pipe and a tower top gas phase outlet pipe. The alkaline salt solution and hydantoin enter from the top of the hydrolysis tower to react. Steam with a pressure of 2.0 MPa and a temperature of 198°C directly enters from the bottom of the hydrolysis tower, contacts the mixture generated by the hydrolysis reaction in reverse, takes away the carbon dioxide and ammonia therein, and releases it from the top of the tower for recycling. Steam is directly used as steam for stripping to separate carbon dioxide and ammonia, saving redundant equipment and reducing economic costs. At the same time, the stability of the device is enhanced, external interference factors are reduced, and the influence of unknown circulating water impurities is eliminated; 2. The direct steam stripping method of the present application does not require the installation of an additional gas analysis tower, thereby significantly reducing the equipment investment cost. Due to the reduction in the number of equipment and operating steps, energy consumption and maintenance costs can be saved in the production process, and the overall economic benefits can be improved. The direct steam stripping method simplifies the production process, reduces potential failure points and operating variables, and thus improves the stability and reliability of the device; 3. This application can eliminate the additional operating conditions and variables introduced by the gas analysis tower in the traditional process, further reduce the impact of external factors on the production process, avoid the circulating water from bringing in unknown impurities that may affect product quality and process stability, and steam as a stripping medium has higher purity and controllability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structural schematic diagram of the saponification liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process provided in this application; Figure 2 A schematic cross-sectional view of the skirt and skirt cylinder of the saponification liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process provided in the present application; Figure 3 A schematic cross-sectional view of a tower body and a first vertical pipe of a saponified liquid acidification treatment device based on a hydantoin hydrolysis tower stripping process provided in the present application; Figure 4 A schematic cross-sectional view of the first vertical pipe and the second vertical pipe of the saponification liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process provided in the present application; Figure 5 This is a schematic cross-sectional view of the second vertical pipe and the third vertical pipe of the saponification liquid acidification treatment device based on the hydroxyl hydrolysis tower stripping process provided in the present application.

[0019] Indicated in the figure: 1. Skirt; 2. Skirt exhaust pipe; 3. Skirt cylinder; 4. Tower body; 5. First vertical pipe; 6. Steam feed pipe at the bottom of the tower; 7. Second vertical pipe; 8. Third vertical pipe; 9. Gas phase outlet pipe at the top of the tower; 10. Liquid phase outlet pipe at the bottom of the tower; 11. Lead-out pipe; 12. Remote level gauge port 1; 13. Remote level gauge port 2; 14. Remote thermometer at the bottom of the tower; 15. Gas phase feed pipe at the bottom of the tower; 16. Flange cover; 17. Remote pressure gauge tube at the bottom of the tower; 18. Foundation ring plate; 19. Skirt inspection window; 20. Remote pressure gauge tube in the tower; 21. Remote thermometer in the tower; 22. Feed pipe at the top of the tower; 23. K2CO3 addition pipe; 24. Safety valve pipe; 25. Spare pipe; 26. Remote thermometer at the top of the tower. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] As described in the background art, the complexity of the equipment is increased and additional operating and maintenance costs are required. The use of a gas analysis tower may also introduce new operating variables and potential failure points, thereby affecting the stability and reliability of the entire production system.

[0022] In order to solve this technical problem, the present invention provides a saponified liquid acidification treatment device based on the hexahydrolysis tower stripping process, which is applied to the field of hydrolysis tower stripping process.

[0023] Specifically, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A saponification liquid acidification treatment device based on the hydroxylamine hydrolysis tower stripping process includes a skirt 1, a skirt cylinder 3 is arranged at the bottom of the inner wall of the skirt 1, the top of the skirt cylinder 3 extends to the top of the skirt 1, the top of the skirt cylinder 3 is connected to the tower body 4, the top of the tower body 4 is connected to the first vertical pipe 5, the surface of the tower body 4 is connected to the tower bottom steam feed pipe 6, the top of the first vertical pipe 5 is connected to the second vertical pipe 7, the top of the second vertical pipe 7 is connected to the third vertical pipe 8, the top of the third vertical pipe 8 is connected to the tower top gas phase outlet pipe 9, and the surface of the skirt cylinder 3 is connected to the skirt exhaust pipe 2.

[0024] In the present application, the alkaline salt solution and hydantoin enter from the top of the hydrolysis tower to react, and the steam with a pressure of 2.0 MPa and a temperature of 198°C enters directly from the bottom of the hydrolysis tower, contacts the mixture generated by the hydrolysis reaction in reverse, takes away the carbon dioxide and ammonia therein, and releases them from the top of the tower for recycling. The steam is directly used as the stripping steam to separate the carbon dioxide and ammonia, which saves redundant equipment and reduces economic costs. At the same time, the stability of the device is enhanced, external interference factors are reduced, and the influence of unknown circulating water impurities is eliminated.

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A saponification liquid acidification treatment device based on the hydroxylamine hydrolysis tower stripping process includes a skirt 1, a skirt cylinder 3 is arranged at the bottom of the inner wall of the skirt 1, the top of the skirt cylinder 3 extends to the top of the skirt 1, the top of the skirt cylinder 3 is connected to the tower body 4, the top of the tower body 4 is connected to the first vertical pipe 5, the surface of the tower body 4 is connected to the tower bottom steam feed pipe 6, the top of the first vertical pipe 5 is connected to the second vertical pipe 7, the top of the second vertical pipe 7 is connected to the third vertical pipe 8, the top of the third vertical pipe 8 is connected to the tower top gas phase outlet pipe 9, and the surface of the skirt cylinder 3 is connected to the skirt exhaust pipe 2.

[0029] By means of the skirt 1, skirt exhaust pipe 2, skirt cylinder 3, tower body 4, first vertical pipe 5, tower bottom steam feed pipe 6, second vertical pipe 7, third vertical pipe 8 and tower top gas phase outlet pipe 9, alkaline salt solution and hydroxylamine enter from the top of the hydrolysis tower to react, steam with a pressure of 2.0 MPa and a temperature of 198°C directly enters from the bottom of the hydrolysis tower, contacts with the mixture generated by the hydrolysis reaction in reverse, takes away the carbon dioxide and ammonia therein, and releases from the top of the tower for recycling, directly using steam as stripping steam to separate carbon dioxide and ammonia, saving redundant equipment, reducing economic costs, and at the same time enhancing the stability of the device, reducing external interference factors, and eliminating the influence of unknown circulating water impurities.

[0030] The bottom of the tower body 4 is connected with a tower bottom liquid phase outlet pipe 10 , and a lead-out pipe 11 is sleeved on the surface of the tower bottom liquid phase outlet pipe 10 . The left side of the tower body 4 is connected with a skirt exhaust pipe 2 .

[0031] By providing a tower bottom liquid phase outlet pipe 10, it is convenient to discharge the liquid at the bottom of the inner cavity of the tower body 4, and by providing a skirt seat exhaust pipe 2, it is convenient to discharge the gas in the inner cavity of the skirt seat 1.

[0032] The top of the right side of the tower body 4 is connected with a remote level gauge port 12, the bottom of the right side of the tower body 4 is connected with a remote level gauge port 2 13, and the surface of the remote level gauge port 2 13 is penetrated by a tower bottom remote thermometer 14.

[0033] By setting the remote liquid level gauge port 13 and the remote liquid level gauge port 13, it is convenient to detect the height of the liquid level in the inner cavity of the tower body 4, so that the operator can discharge the liquid and control the liquid level as needed. By setting the tower bottom remote thermometer 14, it is convenient to detect the bottom temperature of the inner cavity of the tower body 4 and to control the steam content entering the inner cavity of the tower body 4.

[0034] The bottom of the left side of the tower body 4 is connected to a tower bottom gas-phase feed pipe 15, and a flange cover 16 is connected to the left side of the tower bottom gas-phase feed pipe 15. A handle is connected to the surface of the flange cover 16, and one side of the flange cover 16 extends to the inner cavity of the tower bottom gas-phase feed pipe 15 and is threadedly connected to the inner wall of the tower bottom gas-phase feed pipe 15.

[0035] By setting up the gas-phase feed pipe 15 at the bottom of the tower, it is convenient to add a purifier to the inner cavity of the tower body 4 for treating and purifying the saponified liquid acid. By setting up the flange cover 16, the gas-phase feed pipe 15 at the bottom of the tower can be sealed with good sealing performance. By setting up a handle, the flange cover 16 is easy to rotate and disassemble.

[0036] A nameplate is installed on the surface of the tower body 4 , and the surface of the first vertical pipe 5 is connected to a remote pressure gauge tube 17 at the bottom of the tower.

[0037] By providing a remote pressure gauge tube 17 at the bottom of the tower, the pressure at the bottom of the inner cavity of the tower body 4 can be detected, so as to facilitate the control of the inner cavity pressure of the tower body 4.

[0038] The bottom of the skirt 1 is connected with a base ring plate 18 , and the surface of the skirt cylinder 3 is inlaid with a skirt inspection window 19 .

[0039] The bottom of the skirt 1 is supported stably by arranging the base ring plate 18 , and the reaction condition of the inner cavity of the skirt cylinder 3 is observed conveniently by arranging the skirt inspection window 19 .

[0040] The surface of the second vertical pipe 7 is connected to a remote pressure gauge tube 20 in the tower, and the surface of the second vertical pipe 7 is connected to a remote temperature gauge 21 in the tower.

[0041] By providing a remote pressure gauge tube 20 in the tower, it is convenient to detect the pressure in the inner cavity of the second vertical pipe 7 , and by providing a remote thermometer 21 in the tower, it is convenient to detect the temperature in the inner cavity of the second vertical pipe 7 .

[0042] Example 2, the saponification liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process provided in Example 1 is further optimized, specifically, Figure 5 As shown, the surface of the third vertical pipe 8 is respectively penetrated and connected with a tower top feed pipe 22 and a K2CO3 addition pipe 23, and the bottoms of the tower top feed pipe 22 and the K2CO3 addition pipe 23 penetrate the third vertical pipe 8 and extend to the inner cavity of the second vertical pipe 7.

[0043] By providing a tower top feed pipe 22 and a K2CO3 adding pipe 23, it is convenient to add materials and K2CO3 into the hydrolysis tower.

[0044] The top of the left side of the third vertical pipe 8 is connected to a safety valve pipe 24 , and the top of the third vertical pipe 8 and the rear side of the tower top gas phase outlet pipe 9 are connected to a spare pipe 25 .

[0045] By providing the safety valve pipe 24 , the gas in the inner cavity of the third vertical pipe 8 can be discharged as required, thereby relieving the pressure in the inner cavity of the third vertical pipe 8 .

[0046] A tower top remote thermometer 26 is connected to the top of the third vertical pipe 8. The tower top remote thermometer 26 is provided to detect the temperature of the inner cavity of the third vertical pipe 8, so as to facilitate the control of the inner cavity temperature of the hydrolysis tower.

[0047] Working principle: Alkali salt solution and hydantoin enter from the top of the hydrolysis tower to react, steam with a pressure of 2.0Mpa and a temperature of 198℃ enters directly from the bottom of the hydrolysis tower, contacts the mixture generated by the hydrolysis reaction in reverse, takes away the carbon dioxide and ammonia, and releases them from the top of the tower for recycling, and directly uses steam as stripping steam to separate carbon dioxide and ammonia.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process, characterized in that: The invention comprises a skirt seat (1), wherein a skirt seat cylinder (3) is arranged at the bottom of the inner wall of the skirt seat (1), the top of the skirt seat cylinder (3) extends to the top of the skirt seat (1), the top of the skirt seat cylinder (3) is connected to a tower body (4), the top of the tower body (4) is connected to a first vertical pipe (5), the surface of the tower body (4) is connected to a tower bottom steam feed pipe (6), the top of the first vertical pipe (5) is connected to a second vertical pipe (7), the top of the second vertical pipe (7) is connected to a third vertical pipe (8), the top of the third vertical pipe (8) is connected to a tower top gas phase outlet pipe (9), and the surface of the skirt seat cylinder (3) is connected to a skirt seat exhaust pipe (2).

2. The saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 1 is characterized in that: The bottom of the tower body (4) is connected to a tower bottom liquid phase outlet pipe (10), the surface of the tower bottom liquid phase outlet pipe (10) is sleeved with an outlet pipe (11), and the left side of the tower body (4) is connected to a skirt exhaust pipe (2).

3. A saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 2, characterized in that: The top of the right side of the tower body (4) is connected to a remote level gauge port 1 (12), the bottom of the right side of the tower body (4) is connected to a remote level gauge port 2 (13), and a tower bottom remote temperature meter (14) is connected through the surface of the remote level gauge port 2 (13).

4. The saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 3 is characterized in that: The bottom of the left side of the tower body (4) is connected to a tower bottom gas-phase feed pipe (15), and a flange cover (16) is connected to the left side of the tower bottom gas-phase feed pipe (15). A handle is connected to the surface of the flange cover (16), and one side of the flange cover (16) extends to the inner cavity of the tower bottom gas-phase feed pipe (15) and is threadedly connected to the inner wall of the tower bottom gas-phase feed pipe (15).

5. The saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 4 is characterized in that: A nameplate is installed on the surface of the tower body (4), and the surface of the first vertical pipe (5) is connected to a remote pressure gauge tube (17) at the bottom of the tower.

6. The saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 5 is characterized in that: The bottom of the skirt seat (1) is connected to a base ring plate (18), and the surface of the skirt seat cylinder (3) is inlaid with a skirt seat inspection window (19).

7. The saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 6 is characterized in that: The surface of the second vertical pipe (7) is in communication with a remote pressure gauge tube (20) in the tower, and the surface of the second vertical pipe (7) is in communication with a remote temperature gauge (21) in the tower.

8. The saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 7 is characterized in that: The surface of the third vertical pipe (8) is respectively penetrated and connected with a tower top feed pipe (22) and a K2CO3 addition pipe (23); the bottoms of the tower top feed pipe (22) and the K2CO3 addition pipe (23) penetrate the third vertical pipe (8) and extend to the inner cavity of the second vertical pipe (7).

9. A saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 8, characterized in that: The top of the left side of the third vertical pipe (8) is connected to a safety valve pipe (24), and the top of the third vertical pipe (8) and the rear side of the tower top gas phase outlet pipe (9) are connected to a spare pipe (25).

10. The saponified liquid acidification treatment device based on the hydantoin hydrolysis tower stripping process according to claim 9, characterized in that: The top of the third vertical pipe (8) is connected to a tower top remote temperature meter (26).

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