Hydrogen peroxide working solution alkaline cleaning regeneration device

Abstract

The utility model relates to a regenerating device technical field, concretely is a kind of sodium hydroxide working solution caustic soda washing regenerating device, including the caustic soda washing system electric connection with SIS control system;Caustic soda washing system includes the working solution buffer tank, working solution heater, working solution reactor, working solution cooler, working solution filter, lye separator and acid liquid separator sequentially connected along the flow order of material through pipeline;Working solution buffer tank, working solution heater and working solution reactor are all connected with the material removal main pipe by material removal branch pipe, and material removal valve is equipped on material removal branch pipe;Working solution buffer tank and working solution reactor are all provided with thermometer, pressure gauge and laser oxygen analyzer, and thermometer, pressure gauge, laser oxygen analyzer and material removal valve are electrically connected with SIS control system;The utility model can avoid oxygen content, pressure, temperature too high, ensure the security of device, avoid causing relatively big personal injury accident.

Description

Technical Field

[0001] This utility model relates to the field of regeneration device technology, specifically a hydrogen peroxide working solution alkaline washing and regeneration device. Background Technology

[0002] Traditional all-acid hydrogen peroxide production processes produce anthraquinone degradation products in the working fluid system during long-term operation, which reduces the effective anthraquinone content and consequently reduces hydrogenation and oxidation efficiency. Under the current strict control and management of hydrogen peroxide in China, the only option is to rely on clay bed regeneration, but clay bed regeneration cannot completely and effectively remove anthraquinone degradation products.

[0003] To effectively remove anthraquinone degradation products, hydrogen peroxide working fluid alkaline washing and regeneration devices have emerged in the hydrogen peroxide industry; however, the existing hydrogen peroxide working fluid alkaline washing and regeneration devices have inadequate safety facilities and pose certain safety risks. Utility Model Content

[0004] The main purpose of this utility model is to provide a hydrogen peroxide working fluid alkaline washing and regeneration device to solve the problem that the safety facilities of the hydrogen peroxide working fluid alkaline washing and regeneration device in the prior art are not perfect and there are certain safety risks.

[0005] To achieve the above objectives, this utility model provides a hydrogen peroxide working fluid alkaline washing and regeneration device, including an alkaline washing system electrically connected to a SIS control system; the alkaline washing system includes a working fluid buffer tank, a working fluid heater, a working fluid reactor, a working fluid cooler, a working fluid filter, an alkaline separator, and an acid separator connected sequentially via pipelines along the material flow sequence; the working fluid buffer tank, the working fluid heater, and the working fluid reactor are all connected to a discharge main pipe via discharge branch pipes, and discharge valves are provided on the discharge branch pipes; thermometers, pressure gauges, and laser oxygen analyzers are provided on the working fluid buffer tank and the working fluid reactor, and the thermometers, pressure gauges, laser oxygen analyzers, and discharge valves are electrically connected to the SIS control system.

[0006] Furthermore, the working fluid buffer tank is connected to a working fluid inlet pipe, which is equipped with a working fluid inlet valve and a working fluid inlet pump; the acid separator is connected to a regenerated working fluid outlet pipe, which is equipped with a regenerated working fluid outlet valve; the working fluid inlet valve, the regenerated working fluid outlet valve, and the working fluid inlet pump are all electrically connected to the SIS control system.

[0007] Furthermore, the working fluid inlet pipe is connected to a working fluid feed tank, and the regenerated working fluid outlet pipe is connected to a regenerated working fluid receiving tank; the regenerated working fluid receiving tank is connected to a regenerated working fluid discharge pipe, and the regenerated working fluid discharge pipe is equipped with a regenerated working fluid discharge pump and a regenerated working fluid discharge valve; the regenerated working fluid discharge pump and the regenerated working fluid discharge valve are electrically connected to the SIS control system.

[0008] Furthermore, the working fluid buffer tank is connected to an alkali inlet pipe, which is connected to an alkali solution preparation tank.

[0009] Furthermore, an acid inlet pipe is connected between the alkali separator and the acid separator, and the acid inlet pipe is connected to an acid preparation tank.

[0010] Furthermore, the alkali separator is connected to a waste alkali discharge pipe; the acid separator is connected to a waste acid discharge pipe.

[0011] This invention establishes an alkaline washing system electrically connected to the SIS control system. The system includes a working fluid inlet valve, a working fluid inlet pump, and a regenerated working fluid outlet valve on the working fluid buffer tank and the working fluid reactor, all electrically connected to the SIS control system. This allows the alkaline washing system to shut down and the working fluid inlet valve, working fluid inlet pump, and regenerated working fluid outlet valve when the oxygen content, pressure, or temperature in the working fluid buffer tank and working fluid reactor is too high.

[0012] This invention, by installing thermometers, pressure gauges, laser oxygen analyzers, and discharge valves on the working fluid buffer tank and working fluid reactor, and electrically connecting them to the SIS control system, can urgently discharge materials when the oxygen content, pressure, and temperature of the working fluid buffer tank and working fluid reactor exceed the control parameters, thus ensuring the safety of the device and avoiding major personal injury accidents. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0014] Figure 1 A schematic diagram of the structure of an embodiment of a hydrogen peroxide working solution alkaline washing and regeneration device; In the diagram: 1. Working fluid buffer tank; 2. Working fluid heater; 3. Working fluid reactor; 4. Working fluid cooler; 5. Working fluid filter; 6. Alkali separator; 7. Acid separator; 8. Discharge branch pipe; 9. Discharge main pipe; 10. Discharge valve; 11. Thermometer; 12. Pressure gauge; 13. Laser oxygen analyzer; 14. Working fluid inlet pipe; 15. Working fluid inlet valve; 16. Regenerated working fluid outlet pipe; 17. Regenerated working fluid outlet pipe. 18. Feed valve; 19. Working fluid feed tank; 20. Regenerated working fluid receiving tank; 21. Alkali inlet pipe; 22. Alkali preparation tank; 23. Acid inlet pipe; 24. Acid preparation tank; 25. Discharge tank; 26. Waste alkali discharge pipe; 27. Waste acid discharge pipe; 28. Working fluid inlet pump; 29. ​​Regenerated working fluid discharge pipe; 30. Regenerated working fluid discharge pump; 31. Feed tank inlet pipe; 32. Feed tank inlet valve. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 As shown, according to an embodiment of this utility model, a hydrogen peroxide working fluid alkaline washing and regeneration device is provided, including an alkaline washing system electrically connected to a SIS control system; the alkaline washing system includes a working fluid buffer tank 1, a working fluid heater 2, a working fluid reactor 3, a working fluid cooler 4, a working fluid filter 5, an alkaline separator 6, and an acid separator 7 connected sequentially through pipelines along the flow sequence of the materials; the working fluid buffer tank 1, the working fluid heater 2, and the working fluid reactor 3 are all connected to a discharge main pipe 9 through discharge branch pipes 8, and discharge valves 10 are provided on the discharge branch pipes 8, and discharge pools 24 are connected to the discharge main pipe 9; thermometers 11, pressure gauges 12, and laser oxygen analyzers 13 are provided on the working fluid buffer tank 1 and the working fluid reactor 3, and the thermometers 11, pressure gauges 12, laser oxygen analyzers 13, and discharge valves 10 are electrically connected to the SIS control system.

[0017] The function of the working fluid heater 2 is to raise the working fluid temperature to 60±2℃, which is beneficial to the reaction between the working fluid and the alkali solution, and the reaction effect is good at this temperature. In the working fluid reactor 3, the alkali solution reacts with the anthraquinone degradation products in the working fluid to replace the effective anthraquinone. The working fluid cooler 4 cools the regenerated working fluid to 40-50℃ and sends it to the hydrogen peroxide production system to meet the temperature requirements of the hydrogen peroxide hydrogenation reaction. The working fluid filter 5 is a 2-5 micron precision filter, mainly used to filter out impurities brought by external materials such as alkali solution, phosphoric acid, and pure water, as well as impurities that may exist in the purification device.

[0018] The working fluid buffer tank 1 is connected to a working fluid inlet pipe 14, which is equipped with a working fluid inlet valve 15 and a working fluid inlet pump 27. The acid separator 7 is connected to a regenerated working fluid outlet pipe 16, which is equipped with a regenerated working fluid outlet valve 17. The working fluid inlet valve 15, the regenerated working fluid outlet valve 17, and the working fluid inlet pump 27 are all electrically connected to the SIS control system.

[0019] The working fluid inlet pipe 14 is connected to the working fluid feed tank 18, the regenerated working fluid outlet pipe 16 is connected to the regenerated working fluid receiving tank 19, the regenerated working fluid receiving tank 19 is connected to the regenerated working fluid discharge pipe 28, the regenerated working fluid discharge pipe 28 is equipped with a regenerated working fluid discharge pump 29 and a regenerated working fluid discharge valve 30; the regenerated working fluid discharge pump 29 and the regenerated working fluid discharge valve 30 are electrically connected to the SIS control system.

[0020] The working fluid feed tank 18 is connected to a feed tank inlet pipe 31 for feeding the working fluid. The feed tank inlet pipe 31 is equipped with a feed tank inlet valve 32, which is electrically connected to the SIS control system.

[0021] Both the working fluid feed tank 18 and the regenerated working fluid receiving tank 19 are equipped with a nitrogen sealing system. The nitrogen sealing system consists of a nitrogen supply valve, a nitrogen release valve, and a breather valve. It is operated by a pilot valve to achieve precise pressure reduction control. The nitrogen supply valve includes a pilot valve and a main valve structure. The nitrogen release valve is based on the pressure-opening micro-pressure regulation principle and can automatically replenish or release nitrogen according to the pressure change of the storage tank, maintaining the pressure of the working fluid feed tank 18 and the regenerated working fluid receiving tank 19 at 0.8 kPa. The breather valve enhances the safety of the system.

[0022] The working fluid buffer tank 1 is connected to an alkali inlet pipe 20, which is connected to an alkali solution preparation tank 21. A 2% caustic soda solution is prepared in the alkali solution preparation tank 21. The purpose of adding alkali is to react the alkali solution with the anthraquinone degradation products in the working fluid.

[0023] The pipeline connecting the alkali separator 6 and the acid separator 7 is an acid inlet pipe 22, which is connected to an acid preparation tank 23. A 3% phosphoric acid solution is prepared in the acid preparation tank 23. The purpose of adding acid is to adjust the pH of the working solution after the alkali reaction in the previous process to a slightly acidic state. This is because the working solution in the hydrogen peroxide production unit must be slightly acidic.

[0024] Alkali separator 6 and acid separator 7 are two-phase coalescing separators used to separate the oil phase and water phase in the working fluid. After the oil phase and water phase separate into layers, the oil phase flows out at the top of the equipment and the water phase is discharged at the bottom of the equipment. Alkali separator 6 separates the oil phase from the alkali solution, and acid separator 7 separates the oil phase from the acid solution.

[0025] Alkali separator 6 is connected to waste alkali discharge pipe 25; acid separator 7 is connected to waste acid discharge pipe 26; for alkaline waste liquid with a COD content generally above 10000mg / L, it is sent to incineration after recycling; for acidic waste liquid with a COD content generally below 3000mg / L, it is sent to sewage treatment device after recycling.

[0026] The working principle of the above embodiments is as follows: 1. To prevent safety hazards caused by increased oxygen content, pressure, and temperature in the working fluid alkaline washing unit, an emergency shutdown interlock process is implemented: ① Set the threshold 1 at the top of the working fluid buffer tank 1: oxygen content 22.5%, pressure 5 kPaG, and temperature 65℃ respectively; when two of the three values ​​exceed the threshold 1, the SIS control system controls the shutdown of the alkaline washing system, the working fluid inlet valve 15, the working fluid inlet pump 27, and the regenerated working fluid outlet valve 17. ② Set the threshold two at the top of the working fluid buffer tank 1: oxygen content 24%, pressure 6KPaG, temperature 70℃; when two of the three values ​​exceed the threshold two, the SIS control system controls the interlock to open the discharge valve 10 that can discharge the material in the working fluid buffer tank 1, and closes the feed tank inlet valve 32, the regenerated working fluid discharge pump 29 and the regenerated working fluid discharge valve 30.

[0027] 2. To prevent safety hazards caused by increased oxygen content, pressure, and temperature in the working fluid alkaline washing unit, an emergency shutdown interlock process is implemented: ① Set the threshold one at the top of the working fluid reactor 3: oxygen content 22.5%, pressure 5 kPaG, and temperature 65℃ respectively; when two of the three values ​​exceed the threshold one, the SIS control system controls the shutdown of the alkaline washing system, the working fluid inlet valve 15, the working fluid inlet pump 27, and the regenerated working fluid outlet valve 17. ② Set the threshold two at the top of the working fluid reactor 3: oxygen content 24%, pressure 6 kPaG, temperature 70℃; when two of the three values ​​exceed the threshold two, the SIS control system controls the interlock to open the discharge valve 10 that can discharge the material in the working fluid reactor 3, and closes the feed tank inlet valve 32, the regenerated working fluid discharge pump 29 and the regenerated working fluid discharge valve 30.

[0028] This embodiment sets up an alkaline washing system electrically connected to the SIS control system. The working fluid buffer tank and the working fluid reactor are equipped with a working fluid inlet valve, a working fluid inlet pump, and a regenerated working fluid outlet valve, all of which are electrically connected to the SIS control system. When the oxygen content, pressure, or temperature in the working fluid buffer tank and the working fluid reactor is too high, the alkaline washing system can be shut down, and the working fluid inlet valve, the working fluid inlet pump, and the regenerated working fluid outlet valve can be closed.

[0029] This embodiment, by installing thermometers, pressure gauges, laser oxygen analyzers, and discharge valves on the working fluid buffer tank and working fluid reactor, and electrically connecting them to the SIS control system, enables emergency discharge when the oxygen content, pressure, and temperature of the working fluid buffer tank and working fluid reactor exceed control parameters, ensuring the safety of the device and avoiding major personal injury accidents.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydrogen peroxide working solution alkaline washing and regeneration device, characterized in that, The system includes an alkaline washing system electrically connected to the SIS control system. The alkaline washing system includes a working fluid buffer tank (1), a working fluid heater (2), a working fluid reactor (3), a working fluid cooler (4), a working fluid filter (5), an alkaline separator (6), and an acid separator (7) connected sequentially through pipes along the flow sequence of the material. The working fluid buffer tank (1), the working fluid heater (2), and the working fluid reactor (3) are all connected to a discharge main pipe (9) through a discharge branch pipe (8). A discharge valve (10) is provided on the discharge branch pipe (8). A thermometer (11), a pressure gauge (12), and a laser oxygen analyzer (13) are provided on the working fluid buffer tank (1) and the working fluid reactor (3). The thermometer (11), the pressure gauge (12), the laser oxygen analyzer (13), and the discharge valve (10) are electrically connected to the SIS control system.

2. The hydrogen peroxide working solution alkaline washing and regeneration device as described in claim 1, characterized in that, The working fluid buffer tank (1) is connected to a working fluid inlet pipe (14), and the working fluid inlet pipe (14) is equipped with a working fluid inlet valve (15) and a working fluid inlet pump (27); the acid separator (7) is connected to a regenerated working fluid outlet pipe (16), and the regenerated working fluid outlet pipe (16) is equipped with a regenerated working fluid outlet valve (17); the working fluid inlet valve (15), the regenerated working fluid outlet valve (17) and the working fluid inlet pump (27) are all electrically connected to the SIS control system.

3. The hydrogen peroxide working solution alkaline washing and regeneration device as described in claim 2, characterized in that, The working fluid inlet pipe (14) is connected to the working fluid feed tank (18), and the regenerated working fluid outlet pipe (16) is connected to the regenerated working fluid receiving tank (19); the regenerated working fluid receiving tank (19) is connected to the regenerated working fluid discharge pipe (28), and the regenerated working fluid discharge pipe (28) is equipped with a regenerated working fluid discharge pump (29) and a regenerated working fluid discharge valve (30); the regenerated working fluid discharge pump (29) and the regenerated working fluid discharge valve (30) are electrically connected to the SIS control system.

4. The hydrogen peroxide working solution alkaline washing and regeneration device as described in claim 1, characterized in that, The working fluid buffer tank (1) is connected to an alkali inlet pipe (20), and the alkali inlet pipe (20) is connected to an alkali preparation tank (21).

5. The hydrogen peroxide working solution alkaline washing and regeneration device as described in claim 4, characterized in that, The pipeline between the alkali separator (6) and the acid separator (7) is connected to an acid inlet pipe (22), and the acid inlet pipe (22) is connected to an acid preparation tank (23).

6. The hydrogen peroxide working solution alkaline washing and regeneration device as described in claim 5, characterized in that, The alkali separator (6) is connected to a waste alkali discharge pipe (25); the acid separator (7) is connected to a waste acid discharge pipe (26).

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