High-efficiency condensing separation equipment for anthraquinone hydrogen peroxide production

Abstract

The application discloses a kind of high-efficiency condensing separation equipment for anthraquinone hydrogen peroxide production, anthraquinone hydrogen peroxide technical field, including: pipe box section and separation section, pipe box section is equipped with symmetrically arranged upper tube sheet and lower tube sheet, baffles are arranged staggeredly between upper tube sheet and lower tube sheet, a plurality of vertically arranged heat transfer tube bundles are inserted between baffle, heat transfer tube bundle is located in the separation section and is sleeved with back cooling section, both sides of back cooling section are respectively communicated with pipe box section, one side of pipe box section is equipped with cold flow inlet, and the other side of pipe box section is equipped with cold flow outlet, cooling medium flows into pipe box section through cold flow inlet, one way along baffle and passes through cold flow outlet, another way along back cooling section recondenses heat transfer tube bundle and converges with one way along baffle and passes through cold flow outlet.This application has high condensing efficiency and good condensing effect, improves the use efficiency of equipment and increases the operating efficiency of heat exchange, improves the reliability of equipment, and increases the production performance.

Description

Technical Field

[0001] This invention relates to the field of anthraquinone hydrogen peroxide technology, and more specifically, to a high-efficiency condensation and separation device for the production of anthraquinone hydrogen peroxide. Background Technology

[0002] Hydrogen peroxide is a green chemical product, with virtually no pollution during its production and use, hence its reputation as a "clean" chemical product, and its application prospects are increasingly promising. Initially used only in pharmaceuticals and the military, hydrogen peroxide has gradually been applied to a wide range of fields, including chemical synthesis, textiles, papermaking, environmental protection, food, pharmaceuticals, metallurgy, and agriculture, leading to a growing market demand.

[0003] There are several methods for producing hydrogen peroxide, among which the anthraquinone process is one of the most mature methods in the world. Large international manufacturers all use the anthraquinone process, and domestic hydrogen peroxide production is almost entirely based on it. The specific process involves preparing a working solution of 2-alkylanthraquinone with an organic solvent (C9-C10). Under conditions of 0.30-0.50 MPa pressure, 55℃-65℃ temperature, and the presence of a catalyst (Ni or Pd), H2 is introduced for hydrogenation. Then, the solution undergoes countercurrent oxidation with air at 40-44℃. After extraction, regeneration, purification, and concentration, the final H2O2 aqueous solution is obtained.

[0004] Currently, the main chemical reactions and basic principles of anthraquinone process for producing hydrogen peroxide are the same both domestically and internationally. However, after passing through the flash tank during the hydrogen peroxide production process, the vacuum air extracted contains water vapor, hydrogen peroxide vapor, and non-condensable gases. If this air is directly introduced into the subsequent vacuum unit, it will increase the load on the vacuum unit, reduce its efficiency, and long-term water ingress will directly damage the unit, causing huge losses.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0006] To address the problems in related technologies, this invention proposes a high-efficiency condensation and separation device for the production of hydrogen peroxide using the anthraquinone process, thereby overcoming the aforementioned technical problems existing in the prior art.

[0007] The technical solution of this invention is implemented as follows:

[0008] A high-efficiency condensation and separation device for anthraquinone hydrogen peroxide production includes: a pipe box section and a separation section, wherein the pipe box section is connected to the top of the separation section;

[0009] The tube box section is provided with symmetrically arranged upper tube sheet and lower tube sheet. Baffles are arranged in an alternating manner between the upper tube sheet and lower tube sheet. Several vertically arranged heat transfer tube bundles are interspersed between the baffles. The bottom ends of the heat transfer tube bundles extend into the separation section. A recirculation section is provided inside the separation section. The two ends of the recirculation section are respectively connected to the tube box section. A cold flow inlet is provided on one side of the tube box section, and a cold flow outlet is provided on the other side of the tube box section. The cooling medium flows into the tube box section through the cold flow inlet. One path flows along the baffle and out through the cold flow outlet, while the other path flows along the recirculation section to recondense the heat transfer tube bundles and merges with the other path along the baffle and flows out through the cold flow outlet.

[0010] The top of the tube box section is provided with an airflow inlet, and the side of the separation section is provided with an airflow outlet. Vacuum air flows into the heat transfer tube bundle through the airflow inlet for heat exchange and flows to the separation section for precipitation and desorption. Non-condensable gas flows out through the airflow outlet.

[0011] Furthermore, an air baffle is fitted inside the airflow inlet and located within the pipe box section.

[0012] Furthermore, a baffle plate is fitted inside the airflow outlet and the separation section.

[0013] Furthermore, the bottom end of the separation section is provided with a liquid outlet.

[0014] Furthermore, a fixing plate is connected between the baffles.

[0015] Furthermore, the upper tube sheet, the lower tube sheet, and the baffle plate are all horizontally arranged.

[0016] Furthermore, several cold flow slots are provided on both sides of the heat transfer tube bundle.

[0017] The beneficial effects of this invention are as follows: Vacuum air flows downward with the heat transfer tube bundle and exchanges heat with the cooling medium in the tube box section. Water vapor and hydrogen peroxide vapor condense and flow to the separation section. At this time, the condensate contains non-condensable gases, which undergo secondary condensation in the separation section in conjunction with the recooling section. After secondary condensation, the condensate containing non-condensable gases undergoes precipitation and desorption in the separation section, resulting in complete separation of the gas and liquid states. Water vapor and hydrogen peroxide are collected from the bottom of the equipment, while the desorbed non-condensable gases enter the subsequent process through the air outlet. This achieves high condensation efficiency and good condensation effect, improves the utilization efficiency of the equipment, increases the operating efficiency of the heat exchange, improves the reliability of the equipment, and increases production performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a high-efficiency condensation and separation device for anthraquinone hydrogen peroxide production according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the cold flow channel structure of a high-efficiency condensation and separation device for anthraquinone hydrogen peroxide production according to an embodiment of the present invention.

[0021] In the picture:

[0022] 1. Tube box section; 2. Separation section; 3. Upper tube sheet; 4. Baffle plate; 5. Heat transfer tube bundle; 6. Cooling return section; 7. Lower tube sheet; 8. Air baffle; 9. Liquid baffle; 10. Liquid outlet; 11. Cold flow inlet; 12. Cold flow outlet; 13. Fixing plate; 14. Cold flow channel opening;

[0023] 21. Airflow inlet; 22. Airflow outlet. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0025] According to an embodiment of the present invention, a high-efficiency condensation and separation device for the production of hydrogen peroxide using the anthraquinone process is provided.

[0026] This technical solution condenses and separates water vapor and hydrogen peroxide vapor in the vacuum, allowing the remaining non-condensable gas portion to enter the vacuum unit separately. Therefore, the high-efficiency condensation and separation equipment for hydrogen peroxide production of this invention is introduced to complete the above separation operation, as detailed below:

[0027] like Figures 1-2 As shown, the high-efficiency condensation and separation equipment for anthraquinone hydrogen peroxide production according to an embodiment of the present invention includes: a pipe box section 1 and a separation section 2, wherein the pipe box section 1 is connected to the top of the separation section 2;

[0028] The tube box section 1 is provided with an upper tube sheet 3 and a lower tube sheet 7 symmetrically arranged. Between the upper tube sheet 3 and the lower tube sheet 7, there are staggered baffles 4. Several vertically arranged heat transfer tube bundles 5 are interspersed between the baffles 4. The bottom end of the heat transfer tube bundles 5 extends into the separation section 2. The heat transfer tube bundles 5 are located in the separation section 2 and are fitted with a return cooling section 6. The two ends of the return cooling section 6 are respectively connected to the tube box section 1. The tube box section 1 is provided with a cold flow inlet 11 on one side and a cold flow outlet 12 on the other side. The cooling medium flows into the tube box section 1 through the cold flow inlet 11. One path flows along the baffles 4 and out through the cold flow outlet 12. The other path flows along the return cooling section 6 to re-condense the heat transfer tube bundles 5 and merges with the path along the baffles 4 and flows out through the cold flow outlet 12.

[0029] The top of the tube box section 1 is provided with an airflow inlet 21, and the side of the separation section 2 is provided with an airflow outlet 22. Vacuum air flows into the heat transfer tube bundle 5 through the airflow inlet 21 for heat exchange and flows to the separation section 2 for precipitation and desorption. Non-condensable gas flows out through the airflow outlet 22.

[0030] With the help of the above scheme, the vacuum air flows downward with the heat transfer tube bundle 5 and exchanges heat with the cooling medium in the tube box section 1. Water vapor and hydrogen peroxide vapor condense down and flow to the separation section 2. At this time, the condensate contains non-condensable gas, which undergoes secondary condensation in the separation section 2 in conjunction with the return cooling section 6. After secondary condensation, the condensate containing non-condensable gas undergoes precipitation and desorption in the separation section 2, and the gas and liquid states are completely separated. Water vapor and hydrogen peroxide are collected from the bottom of the equipment, while the desorbed non-condensable gas enters the subsequent process through the air outlet 22. This achieves high condensation efficiency and good condensation effect, improves the utilization efficiency of the equipment and increases the operating efficiency of heat exchange, improves the reliability of the equipment, and increases production performance.

[0031] In addition, the airflow inlet 21 is fitted with an air baffle 8 inside the pipe box section 1.

[0032] In this technical solution, after the vacuum enters the tube box section 1, in order to prevent it from directly impacting the heat transfer tube bundle 5, causing local shunting and reducing heat exchange efficiency, a baffle plate 8 is added to the airflow inlet 21. This allows the vacuum to be evenly distributed after entering, participate in heat exchange evenly, improve the efficiency of equipment use and increase the operating efficiency of heat exchange, and avoid energy loss.

[0033] Additionally, a baffle plate 9 is fitted inside the airflow outlet 22 and located within the separation section 2. The bottom end of the separation section 2 is provided with a liquid outlet 10.

[0034] This technical solution reduces intermediate steps in the equipment by using pipe box section 1 and separation section 2, thereby improving operating efficiency and avoiding uncontrollable factors caused by too many intermediate steps.

[0035] Specifically, at the airflow outlet 22 in the separation section 2, a baffle plate 9 is added to prevent the extracted non-condensable gas from containing a small amount of liquid components, further ensuring the reliability of the gas entering the next process.

[0036] In addition, a fixing plate 13 is connected between the baffles 4. The upper tube sheet 3, the lower tube sheet 7, and the baffles 4 are all horizontally arranged.

[0037] This technical solution uses a fixing plate 13 to fix and assemble the baffle plate 4, which improves the stability and reliability of the cooling medium flowing into the tube box section 1 through the cold flow inlet 11 and flowing out along the baffle plate 4 and through the cold flow outlet 12, thereby improving the efficiency of heat exchange in the heat transfer tube bundle 5.

[0038] In addition, several cold flow slots 14 are provided on both sides of the heat transfer tube bundle 5.

[0039] Specifically, in order to further improve the heat exchange efficiency, several cold flow slots 14 can be integrally formed on the outer wall of the heat transfer tube bundle 5. When the cooling medium flows into the tube box section 1 through the cold flow inlet 11 and exchanges heat with the heat transfer tube bundle 5 along the baffle plate 4, the cooling medium can be condensed through the cold flow slots 14, thereby improving the heat exchange efficiency.

[0040] In summary, with the help of the above-mentioned technical solution of the present invention, the vacuum air flows downward with the heat transfer tube bundle 5 and exchanges heat with the cooling medium in the tube box section 1. Water vapor and hydrogen peroxide vapor condense down and flow to the separation section 2. At this time, the condensate contains non-condensable gas, which undergoes secondary condensation in the separation section 2 in conjunction with the return cooling section 6. After secondary condensation, the condensate containing non-condensable gas undergoes precipitation and desorption in the separation section 2, and the gas and liquid states are completely separated. Water vapor and hydrogen peroxide are collected from the bottom of the equipment, while the desorbed non-condensable gas enters the subsequent process through the airflow outlet 22. This achieves high condensation efficiency and good condensation effect, improves the utilization efficiency of the equipment and increases the operating efficiency of heat exchange, improves the reliability of the equipment, and increases production performance.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art, upon considering the disclosure in the specification and embodiments, will readily conceive of other embodiments of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0042] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A high-efficiency condensation and separation device for anthraquinone hydrogen peroxide production, characterized in that, Includes: a pipe box section (1) and a separation section (2), wherein the pipe box section (1) is connected to the top of the separation section (2); The tube box section (1) is provided with symmetrically arranged upper tube sheet (3) and lower tube sheet (7). Baffles (4) are arranged in an alternating manner between the upper tube sheet (3) and lower tube sheet (7). Several vertically arranged heat transfer tube bundles (5) are interspersed between the baffles (4). The bottom end of the heat transfer tube bundles (5) extends into the separation section (2). The heat transfer tube bundles (5) are located inside the separation section (2) and a cooling return section (6) is provided. The ends of the cooling return section (6) are located at both sides. The tube box section (1) is connected to the tube box section (1) respectively. The tube box section (1) has a cold flow inlet (11) on one side and a cold flow outlet (12) on the other side. The cooling medium flows into the tube box section (1) through the cold flow inlet (11). One of the channels flows along the baffle plate (4) and out through the cold flow outlet (12). The other channel flows along the return cooling section (6) to re-condense the heat transfer tube bundle (5) and merges with the other channel along the baffle plate (4) and flows out through the cold flow outlet (12). The top of the tube box section (1) is provided with an airflow inlet (21), and the side of the separation section (2) is provided with an airflow outlet (22). Vacuum air flows into the heat transfer tube bundle (5) through the airflow inlet (21) for heat exchange and flows to the separation section (2) for precipitation and desorption. Non-condensable gas flows out through the airflow outlet (22).

2. The high-efficiency condensation and separation equipment for anthraquinone hydrogen peroxide production according to claim 1, characterized in that, The airflow inlet (21) is located inside the pipe box section (1) and is fitted with an air baffle (8).

3. The high-efficiency condensation and separation equipment for anthraquinone hydrogen peroxide production according to claim 1, characterized in that, The airflow outlet (22) is fitted with a baffle plate (9) located inside the separation section (2).

4. The high-efficiency condensation and separation equipment for anthraquinone hydrogen peroxide production according to claim 3, characterized in that, The bottom end of the separation section (2) is provided with a liquid outlet (10).

5. The high-efficiency condensation and separation equipment for anthraquinone hydrogen peroxide production according to claim 1, characterized in that, A fixing plate (13) is connected between the baffles (4).

6. The high-efficiency condensation and separation equipment for anthraquinone hydrogen peroxide production according to claim 1, characterized in that, The upper tube sheet (3), the lower tube sheet (7), and the baffle plate (4) are respectively arranged horizontally.

7. The high-efficiency condensation and separation equipment for anthraquinone hydrogen peroxide production according to claim 6, characterized in that, Several cold flow slots (14) are provided on both sides of the heat transfer tube bundle (5).

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