Safe and energy-saving hydrogen peroxide production device

Abstract

A safe and energy-saving hydrogen peroxide production device comprises a hydrogenation device, the gas inlet end of the hydrogenation device is connected with a hydrogen inlet pipe and a working solution feeding pipe, and the working solution feeding pipe is connected with a working solution feeding tank; the discharge end of the hydrogenation device is connected to a plurality of primary filters and then connected to a hydrogenation liquid storage tank, the liquid outlet end of the hydrogenation liquid storage tank is sequentially connected to a secondary filter and a security filter, the filtered working liquid is connected to the oxidizer, the discharge end of the oxidizer is connected to an oxidation liquid storage tank, the liquid outlet end of the oxidation liquid storage tank is connected to the extraction tower, and the extraction tower is connected to the secondary filter. The discharge end of the extraction tower is connected to the purification tower, and a product is output from the purification tower. The utility model aims to provide a safe and energy-saving hydrogen peroxide production device, which adopts a full-acid fluidized bed production process, cancels an alkali tower, and can avoid hydrogen peroxide decomposition caused by alkali carried by a system, thereby reducing the risk of burning explosion possibly caused by hydrogen peroxide decomposition.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen peroxide production technology, and in particular to a safe and energy-saving hydrogen peroxide production device. Background Technology

[0002] Currently, the anthraquinone process is a mature technology and remains the primary production method for hydrogen peroxide plants worldwide. The process involves anthraquinone (EAQ) and hydrogen (H2) in the circulating working fluid undergoing a hydrogenation reaction in a hydrogenation tower to produce a hydrogenated liquid containing hydrogen anthraquinone (EH2AQ). The hydrogen anthraquinone (EH2AQ) then reacts with oxygen in an oxidation tower to produce an oxidized liquid containing hydrogen peroxide (H2O2) and anthraquinone (EAQ). This oxidized liquid is then extracted with pure water in an extraction tower. The crude hydrogen peroxide from the bottom of the extraction tower is treated in a purification tower to obtain the final hydrogen peroxide product. The raffinate from the top of the extraction tower is separated from water by a raffinate separator, further dried and dehydrated in an alkali tower, and then returned to the hydrogenation tower for recycling. However, the acid-alkali alternating fixed-bed process is prone to accidents and has been designated as an obsolete process. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a safe and energy-saving hydrogen peroxide production device, which adopts a fully acidic fluidized bed production process, eliminates the alkali tower, and can prevent the decomposition of hydrogen peroxide caused by alkali in the system, thereby reducing the risk of combustion and explosion that may be caused by hydrogen peroxide decomposition.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a safe and energy-saving hydrogen peroxide production device, including a hydrogenator, the inlet end of which is connected to a hydrogen inlet pipe and a working liquid inlet pipe, the working liquid inlet pipe being connected to a working liquid inlet tank; the outlet end of the hydrogenator is connected to multiple primary filters, and then to a hydrogenated liquid storage tank, the outlet end of the hydrogenated liquid storage tank being connected in sequence to a secondary filter and a security filter, the filtered working liquid being connected to an oxidizer, the outlet end of the oxidizer being connected to an oxidizer storage tank, the outlet end of the oxidizer storage tank being connected to an extraction tower, the outlet end of the extraction tower being connected to a purification tower, and the product being output from the purification tower.

[0005] Preferably, the top of the extraction tower is connected in sequence to a coalescer and a flash evaporator via pipelines, and then connected to a working liquid feed tank.

[0006] Preferably, the top of the hydrogenator is provided with a hydrogen recovery pipe, which is connected to the hydrogen inlet pipe after passing through a pressurization device.

[0007] Preferably, the working fluid inlet pipe is equipped with a jet feed pump and also includes a catalyst addition tank connected to the working fluid inlet pipe.

[0008] Preferably, the hydrogenated liquid storage tank is also connected to a backwash pipe, which is connected to a primary filter. The backwash output end of the primary filter is connected to a catalyst recovery pipe, which is connected to a jet feed pump.

[0009] Preferably, the secondary filter and the security filter are also connected to a filter collection container, which is then connected to a catalyst recovery pipe.

[0010] Preferably, the catalyst recovery pipe is also connected to the working fluid recovery pipe, which is connected to the working fluid feed tank, and a catalyst removal filter is provided on the working fluid recovery pipe.

[0011] Preferably, the top of the oxidizer is connected to a tail gas pipe, which is connected in sequence to a gas-liquid separator and a tail gas expander, and the tail gas expander is then connected to a tail gas treatment device.

[0012] Preferably, the working fluid feed tank is also connected to a degradation product circulation pipe, which is connected to the clay bed, then to the recycled material filter, and then to the working fluid feed tank.

[0013] Preferably, the working solution is a solution prepared using anthraquinone as a carrier and heavy aromatic hydrocarbons and tetrabutylurea as mixed solvents.

[0014] This utility model provides a safe and energy-saving hydrogen peroxide production device, which has the following beneficial effects:

[0015] 1. The fully acidic fluidized bed process is adopted, eliminating the alkali tower in the traditional process. This avoids the problem of hydrogen peroxide decomposition caused by alkali in the system, reduces the risk of combustion and explosion caused by hydrogen peroxide decomposition from the source, and improves the safety of the production process.

[0016] 2. The hydrogenation liquid storage tank backwashes the primary filter through a backwashing pipe. The recovered catalyst is connected to the injection feed pump through the catalyst recovery pipe and reintroduced into the hydrogenation reaction, reducing catalyst loss and lowering consumable costs. The secondary filter, security filter, and filter collection container are linked to ensure efficient separation of impurities and catalyst particles in the working fluid. At the same time, the circulating working fluid is further purified through the catalyst removal filter (working fluid recovery pipe) to ensure reaction efficiency and equipment safety.

[0017] 3. Eliminating the need for an alkali tower and associated drying and dehydration equipment simplifies the process, reduces equipment investment and maintenance costs, and lowers the environmental burden of alkali treatment. Working fluid, hydrogen, and tail gas are managed in a closed loop, reducing the risk of material leakage, improving raw material utilization, and meeting the requirements of green chemical production. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0020] like Figure 1 As shown, a safe and energy-saving hydrogen peroxide production device includes a hydrogenator 1. The inlet end of the hydrogenator 1 is connected to a hydrogen inlet pipe 2 and a working liquid inlet pipe 3. The working liquid inlet pipe 3 is connected to a working liquid inlet tank 4. The outlet end of the hydrogenator 1 is connected to multiple primary filters 5, and then to a hydrogenated liquid storage tank 6. The outlet end of the hydrogenated liquid storage tank 6 is sequentially connected to a secondary filter 7 and a security filter 8. The filtered working liquid is connected to an oxidizer 9. The outlet end of the oxidizer 9 is connected to an oxidation liquid storage tank 10. The outlet end of the oxidation liquid storage tank 10 is connected to an extraction tower 11. The outlet end of the extraction tower 11 is connected to a purification tower 12, from which the product is output.

[0021] Preferably, the top of the extraction tower 11 is connected sequentially to the coalescer 13 and the flash evaporator 14 via pipelines, and then to the working liquid feed tank 4. Extraction is performed using pure water. The extracted working liquid is discharged from the top of the tower, undergoes preliminary water separation in the coalescer, and vacuum dehydration in the flash evaporator to ensure that the returned working liquid has extremely low water content, preventing moisture from affecting the hydrogenation reaction efficiency and catalyst activity. The raffinate is treated and directly reused, reducing the amount of new working liquid replenished and lowering material loss and costs.

[0022] Preferably, the top of the hydrogenator 1 is equipped with a hydrogen recovery pipe 15, which is connected to the hydrogen inlet pipe 2 after passing through a pressurization device 29. This recovers unreacted hydrogen, improving raw material utilization, reducing hydrogen consumption and emissions, and lowering production costs and environmental pressure. The pressurization device enables hydrogen circulation, avoiding direct venting and waste, and meeting energy-saving production requirements.

[0023] Preferably, the working fluid inlet pipe 3 is equipped with a jet feed pump 16 and a catalyst addition tank 17, which is connected to the working fluid inlet pipe 3. The jet feed pump provides power to ensure thorough mixing of the catalyst and the working fluid, thereby increasing the contact area and catalytic efficiency of the hydrogenation reaction. The catalyst addition tank allows for online replenishment of the catalyst, avoiding downtime and ensuring continuous and stable production.

[0024] Preferably, the hydrogenated liquid storage tank 6 is also connected to a backwash pipe 18, which is connected to a primary filter 5. The backwash output end of the primary filter 5 is connected to a catalyst recovery pipe 19, which is connected to a jet feed pump 16. The backwash system collects the catalyst particles trapped by the filter and reintroduces them into the reaction through the recovery pipe, reducing catalyst loss and replacement frequency.

[0025] Preferably, the secondary filter 7 and the security filter 8 are also connected to the filter collection container 20, which in turn is connected to the catalyst recovery pipe 19. The secondary + security filter further removes fine impurities, and the filter collection container centrally recovers residual catalyst and impurities, avoiding material waste.

[0026] Preferably, the catalyst recovery pipe 19 is also connected to the working fluid recovery pipe 21, which is connected to the working fluid feed tank 4. A catalyst removal filter 22 is provided on the working fluid recovery pipe 21. The catalyst removal filter accurately traps fine particles, ensuring the purity of the circulating working fluid and extending the equipment life.

[0027] Preferably, the top of the oxidizer 9 is connected to a tail gas pipe 23, which is connected in sequence to a gas-liquid separator 24 and a tail gas expander 25, and the tail gas expander 25 is then connected to a tail gas treatment device.

[0028] Preferably, the working fluid feed tank 4 is also connected to a degradation product circulation pipe 26, which is connected to a clay bed 27, then to a recycled material filter 28, and finally back to the working fluid feed tank 4. The clay bed adsorbs degradation products (such as anthraquinone derivatives) in the working fluid, and the recycled material filter removes impurities, restoring the performance of the working fluid and extending its service life. This reduces the negative impact of degradation products on hydrogenation and oxidation reactions, ensuring stable process parameters and product quality.

[0029] Preferably, the working solution is a solution prepared using anthraquinone as a carrier and heavy aromatics and tetrabutylurea as mixed solvents. The heavy aromatics (high boiling point, good stability) and tetrabutylurea (high solubility) synergistically improve the solubility of anthraquinone and the mass transfer efficiency of the reaction, ensuring the hydrogenation / oxidation reaction rate. The mixed solvent is matched to the fully acidic process, avoiding solvent degradation or side reactions, and ensuring stable performance during long-term cyclic use.

[0030] This device introduces the working fluid and hydrogen gas together into a hydrogenation reactor containing a catalyst. Under specific temperature and pressure, a hydrogenation reaction occurs to generate a corresponding hydroanthraquinone solution (hydrogenated liquid). This solution then reacts with oxygen in the air, reverting the hydroanthraquinone to its original form, while simultaneously generating hydrogen peroxide. Utilizing the difference in solubility of hydrogen peroxide in water and the working fluid, as well as the density difference between the working fluid and water, the working fluid containing hydrogen peroxide is extracted with pure water (oxidized liquid) to obtain an aqueous solution of hydrogen peroxide (commonly known as hydrogen peroxide solution). This aqueous solution is then purified by heavy aromatics treatment to obtain a hydrogen peroxide product with a concentration greater than or equal to 27.5%. The extracted working fluid (raffinate) is dehydrated in a coalescerator, further dehydrated by vacuum flash evaporation and treated with activated alumina before being returned to the hydrogenation process for continued recycling.

[0031] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A safe and energy-saving hydrogen peroxide production device, characterized in that: The device includes a hydrogenator (1), the inlet of which is connected to a hydrogen inlet pipe (2) and a working fluid inlet pipe (3), and the working fluid inlet pipe (3) is connected to a working fluid inlet tank (4); the outlet of the hydrogenator (1) is connected to multiple primary filters (5), and then to a hydrogenated liquid storage tank (6); the outlet of the hydrogenated liquid storage tank (6) is connected in sequence to a secondary filter (7) and a security filter (8); the filtered working fluid is connected to an oxidizer (9); the outlet of the oxidizer (9) is connected to an oxidized liquid storage tank (10); the outlet of the oxidized liquid storage tank (10) is connected to an extraction tower (11); the outlet of the extraction tower (11) is connected to a purification tower (12); and the product is output from the purification tower (12).

2. The safe and energy-saving hydrogen peroxide production device according to claim 1, characterized in that: The top of the extraction tower (11) is connected to the coalescer (13) and the flash evaporator (14) in sequence via pipes, and then connected to the working liquid feed tank (4).

3. The safe and energy-saving hydrogen peroxide production device according to claim 1, characterized in that: The hydrogenator (1) is provided with a hydrogen recovery pipe (15) at the top, and the hydrogen recovery pipe (15) is connected to the hydrogen inlet pipe (2) after passing through a pressurization device (29).

4. The safe and energy-saving hydrogen peroxide production device according to claim 1, characterized in that: The working fluid inlet pipe (3) is equipped with a jet feed pump (16) and also includes a catalyst addition tank (17), which is connected to the working fluid inlet pipe (3).

5. The safe and energy-saving hydrogen peroxide production device according to claim 4, characterized in that: The hydrogenated liquid storage tank (6) is also connected to a backwash pipe (18), which is connected to a primary filter (5). The backwash output end of the primary filter (5) is connected to a catalyst recovery pipe (19), which is connected to a jet feed pump (16).

6. The safe and energy-saving hydrogen peroxide production device according to claim 5, characterized in that: The secondary filter (7) and the security filter (8) are also connected to the filter collection container (20), which is then connected to the catalyst recovery pipe (19).

7. A safe and energy-saving hydrogen peroxide production device according to claim 5 or 6, characterized in that: The catalyst recovery pipe (19) is also connected to the working fluid recovery pipe (21), which is connected to the working fluid feed tank (4). A catalyst removal filter (22) is provided on the working fluid recovery pipe (21).

8. The safe and energy-saving hydrogen peroxide production device according to claim 1, characterized in that: The top of the oxidizer (9) is connected to a tail gas pipe (23), which is connected in sequence to a gas-liquid separator (24) and a tail gas expander (25). The tail gas expander (25) is then connected to a tail gas treatment device.

9. The safe and energy-saving hydrogen peroxide production device according to claim 1, characterized in that: The working fluid feed tank (4) is also connected to the degradation product circulation pipe (26), which is connected to the clay bed (27), then to the recycled material filter (28), and then to the working fluid feed tank (4).

10. The safe and energy-saving hydrogen peroxide production device according to claim 1, characterized in that: The working solution is a solution prepared using anthraquinone as a carrier and heavy aromatic hydrocarbons and tetrabutylurea as mixed solvents.

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