A hydrogen peroxide device effluent recovery processing system and method

Abstract

The application discloses a hydrogen peroxide device discharge recovery treatment system and method, which comprises a waste gas treatment device and a waste water treatment device; the waste gas treatment device comprises two workshops, one of which is used for covering an accident pool and an oil separation pool, and the other is used for covering an acidic tank and an alkaline tank; the two workshops are connected with a burning furnace or a chimney through air suction pipes respectively; the waste water treatment device comprises a waste oil tank, a reaction tank and a clean oil tank, the oil separation pool is connected with the waste oil tank through a liquid suction pipe, a water phase outlet of the waste oil tank is connected with the oil separation pool through a reflux pipe, an oil phase outlet of the waste oil tank is connected with the reaction tank filled with aluminum oxide, and a clean oil outlet of the reaction tank is connected with the clean oil tank; the application can realize recovery treatment of waste gas and working waste liquid generated in a hydrogen peroxide production process, can reduce the odor around the hydrogen peroxide device, and can realize direct recovery of working liquid.

Description

Technical Field

[0001] This invention relates to the field of emissions recovery technology, specifically to a hydrogen peroxide device emissions recovery and treatment system and method. Background Technology

[0002] As the name suggests, a hydrogen peroxide unit is a device that produces hydrogen peroxide. The emergency pool, oil separator, and underground tank set up in the hydrogen peroxide unit were only considered as safety measures during the original design. The safety of the unit can be ensured by adopting on-site direct discharge or venting.

[0003] The production of hydrogen peroxide, especially when using the anthraquinone process, generates large amounts of wastewater and waste gas. Wastewater primarily originates from the production process, equipment cleaning, and byproduct treatment. This wastewater contains residual hydrogen peroxide, organic impurities (such as monoethylanthraquinone), heavy metal ions, and other auxiliary chemicals, and is characterized by high COD (chemical oxygen demand), the presence of specific pollutants, and potential acidity or alkalinity. Waste gas mainly originates from hydrogenation and oxidation stages, containing unreacted oxygen, steam, aromatic hydrocarbon vapors, hydrogen peroxide vapor, and small amounts of volatile organic compounds (VOCs), among other gaseous components. These substances pose certain hazards to human health and the environment.

[0004] However, the use of direct discharge or venting on-site during the installation of hydrogen peroxide equipment did not take environmental protection requirements into account, resulting in excessive VOCs (volatile organic compounds) around the hydrogen peroxide equipment, which caused a strong odor on-site and was difficult to resolve. At the same time, the cleanliness of the oil phase recovered in the current oil separator does not meet the usage requirements. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a hydrogen peroxide production equipment emission recovery and treatment system and method, which can realize the recovery and treatment of waste gas and working waste liquid generated during the hydrogen peroxide production process, reduce the odor around the hydrogen peroxide production equipment, and realize the direct recovery of working liquid, ensuring the cleanliness of oil phase recovery.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the invention, a hydrogen peroxide plant emission recovery and treatment system is provided, comprising a waste gas treatment device and a wastewater treatment device; the waste gas treatment device includes two sheds, one shed for covering an emergency pool and an oil separator, and the other shed for covering an acidic tank and an alkaline tank; the two sheds are respectively connected to an incinerator or a chimney via extraction pipes; the wastewater treatment device includes a waste oil tank, a reaction tank, and a clean oil tank, the oil separator is connected to the waste oil tank via a liquid extraction pipe, the aqueous phase outlet of the waste oil tank is connected to the oil separator via a return pipe, the oil phase outlet of the waste oil tank is connected to the reaction tank containing alumina, and the clean oil outlet of the reaction tank is connected to the clean oil tank; oil cleanliness detection points are provided on the pipes connecting the liquid extraction pipe and the waste oil tank, the pipes connecting the waste oil tank and the reaction tank, and the oil outlet pipe of the reaction tank.

[0008] In some embodiments of the present invention, a control valve is provided on the exhaust pipe, the exhaust pipe is connected to the incinerator or chimney via an intake pipe, and a fan and an intake valve are provided on the intake pipe.

[0009] In some embodiments of the present invention, two liquid extraction pipes are provided, which are respectively connected to the oil phase and the water phase in the oil separator, and each liquid extraction pipe is equipped with a control valve.

[0010] In some embodiments of the present invention, the liquid extraction pipe is connected to the liquid outlet pipe via a first pump, the liquid outlet pipe is connected to the waste oil tank via an oil inlet pipe, and control valves are provided on both the liquid outlet pipe and the oil inlet pipe. The two control valves are spaced a certain distance apart, and the position between the two control valves is connected to the clean oil tank via a connecting pipe. A control valve and a second pump are provided on the connecting pipe.

[0011] In some embodiments of the present invention, the connecting pipe is also connected to the preparation vessel via a pipeline.

[0012] In some embodiments of the present invention, the oil phase outlet of the waste oil tank is connected to the reaction tank in sequence via a discharge pipe, a third pump, and a connecting pipe. Two control valves are provided on the discharge pipe, and the two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank through a connecting pipe, and a control valve is provided on the connecting pipe.

[0013] In some embodiments of the present invention, two reaction vessels are provided, which are connected in parallel. The inlet pipe and outlet pipe of the reaction vessels are also connected by a reflux pipe, and a control valve is provided on the reflux pipe.

[0014] In some embodiments of the present invention, a coalescer is provided on the return pipe connecting the waste oil tank and the oil separator.

[0015] In a second aspect of the present invention, a method for recovering and treating emissions from a hydrogen peroxide device is provided, comprising:

[0016] The oil in the oil phase of the oil separator is pumped into the waste oil tank. After settling, the water in the waste oil tank is returned to the oil separator. The oil in the waste oil tank is pumped into the reaction tank for treatment. The clean oil after treatment is transferred to the clean oil tank.

[0017] If the oil cleanliness detected by the oil cleanliness detector on the pipeline connecting the extraction pipe and the waste oil tank is qualified, the oil is directly transferred to the clean oil tank; otherwise, it is transferred to the waste oil tank.

[0018] If the oil cleanliness detected by the oil cleanliness detector on the pipeline connecting the waste oil tank and the reaction tank is qualified, the oil is directly transferred to the clean oil tank; otherwise, it is transferred to the reaction tank.

[0019] If the oil cleanliness detected by the oil cleanliness detector on the oil outlet pipeline of the reaction tank is qualified, the oil is directly transported to the clean oil tank. If it is not qualified, it is returned to the reaction tank for purification again until it is qualified and then transported to the clean oil tank.

[0020] In some embodiments of the present invention, water in the aqueous phase of the oil separator is pumped to the preparation vessel for recycling.

[0021] One or more technical solutions of the present invention have the following beneficial effects:

[0022] (1) The hydrogen peroxide device emission recovery and treatment system provided by the present invention can prevent VOCs from exceeding the standard around the hydrogen peroxide device and reduce the odor around the hydrogen peroxide device by building sheds on the emergency pool, oil separator, acidic tank and alkaline tank, and using blowers to draw the gas in the sheds to a high point for discharge or to draw it into the incinerator for incineration. In addition, by regenerating the oil in the oil phase of the oil separator with alumina, the clean working fluid obtained can be directly recovered, which greatly reduces the difficulty of the operation of recovering the working fluid in the preparation tank.

[0023] (2) The hydrogen peroxide device emission recovery and treatment system provided by the present invention can select different control valves to open and perform different working states according to the cleanliness of the working fluid by setting multiple detection points in the wastewater treatment device. It can promptly send clean working fluid into the clean oil tank, avoid subsequent reaction processes, and improve recovery efficiency.

[0024] (3) The hydrogen peroxide device emission recovery and treatment system provided by the present invention purifies the working fluid by setting two reaction tanks containing alumina. The activated alumina can adsorb the alkaline solution, regenerate the degradation products and purify the working fluid. In addition, since the activated alumina has a high adsorption efficiency and regeneration capacity, by setting two reaction tanks to work alternately, the degradation products and alkaline solution in the working fluid can be removed continuously and stably, ensuring the continuity and stability of the hydrogen peroxide preparation process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the waste gas treatment device of the present invention;

[0026] Figure 2 This is a schematic diagram of the wastewater treatment device of the present invention.

[0027] In the diagram: 1. Work shed; 2. Accident pool; 3. Oil separator; 4. Extraction pipe; 5. First control valve; 6. Inlet pipe; 7. Second control valve; 8. Fan; 9. Third control valve; 10. Chimney; 11. Incinerator; 12. Mixing vessel; 13. First pump; 14. Liquid extraction pipe; 15. Nineteenth control valve; 16. Waste oil tank; 17. First liquid outlet pipe; 18. Fourth control valve; 19. Fifth control valve; 20. Coalescer; 21. First connecting pipe; 22. Twentieth control valve; 23. Seventh connecting pipe; 24. Fifteenth control valve; 25. First return pipe; 26. Seventh control valve; 2 7. Clean oil tank; 28. Second pump; 29. ​​Sixth control valve; 30. Third pump; 31. First discharge pipe; 32. Fifth connecting pipe; 33. Eighth control valve; 34. Tenth control valve; 35. Eleventh control valve; 36. Fourth connecting pipe; 37. Ninth control valve; 38. Reaction tank; 39. Second oil inlet pipe; 40. Second oil outlet pipe; 41. Twelfth control valve; 42. Thirteenth control valve; 43. Eighteenth control valve; 44. Second reflux pipe; 45. Fourteenth control valve; 46. Third oil inlet pipe; 47. Seventeenth switch valve; 50. Acidic tank; 60. Alkaline tank. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] In a typical embodiment of the present invention, a hydrogen peroxide device emission recovery and treatment system is proposed, such as... Figure 1 and Figure 2As shown, the system includes a waste gas treatment device and a wastewater treatment device. The waste gas treatment device includes two sheds 1, one of which is used to cover the emergency pool 2 and the oil separator 3, and the other shed 1 is used to cover the acidic tank 50 and the alkaline tank 60. The two sheds 1 are respectively connected to the incinerator 11 or the chimney 10 through the exhaust pipe 4. The oil separator 3 is connected to the waste oil tank 16 through the liquid extraction pipe. The water phase outlet of the waste oil tank 16 is connected to the oil separator 3 through the return pipe. The oil phase outlet of the waste oil tank 16 is connected to the reaction tank 38 containing alumina. The clean oil outlet of the reaction tank 38 is connected to the clean oil tank 27. Oil cleanliness detectors are installed on the pipes connecting the liquid extraction pipe to the waste oil tank 16, the pipes connecting the waste oil tank 16 to the reaction tank 38, and the oil outlet pipe of the reaction tank 38.

[0031] In this embodiment, a control valve is installed on the exhaust pipe, and the exhaust pipe is connected to the incinerator or chimney via an intake pipe. A fan and an intake valve are installed on the intake pipe. Specifically, two exhaust pipes 4 are respectively inserted into two sheds 1. A first control valve 5 is installed on the exhaust pipe 4. An intake pipe 6 is connected to the air inlet of the fan 8. The exhaust pipe 4 is connected to the intake pipe 6. A second control valve 7 is installed on the intake pipe 6. An exhaust pipe is connected to the air outlet of the fan 8. A third control valve 9 is installed on the exhaust pipe. The exhaust pipe is connected to the interior of the incinerator 11, and the chimney 10 is connected to the exhaust pipe.

[0032] In this embodiment, two extraction pipes 14 are provided, and the two extraction pipes 14 are respectively connected to the oil phase and the water phase in the oil separator 3. Each extraction pipe is equipped with a control valve.

[0033] Furthermore, the liquid extraction pipe 14 is connected to the liquid outlet pipe via the first pump 13, and the liquid outlet pipe is connected to the waste oil tank 16 via the oil inlet pipe. Both the liquid outlet pipe and the oil inlet pipe are equipped with control valves, and the two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank 27 via a connecting pipe, and the connecting pipe is equipped with a control valve and a second pump 28.

[0034] Furthermore, the connecting pipe is also connected to the preparation vessel 12 via a pipeline.

[0035] Furthermore, a coalescer 20 is installed on the return pipe connecting the waste oil tank 16 and the oil separator 3. The coalescer 20 separates impurities, filters and accumulates liquid foam in the wastewater flowing out of the waste oil tank 16 before returning the wastewater to the oil separator.

[0036] Specific examples Figure 2As shown, the inlet of the first pump 13 is connected to two suction pipes 14, which respectively extract the water phase and oil phase from the oil separator 3. A nineteenth control valve 15 is installed on the suction pipe 14. The outlet of the first pump 13 is connected to a first outlet pipe 17. The wastewater treatment device also includes a waste oil tank 16, a clean oil tank 27, and a second pump 28. A first oil inlet pipe is connected to the waste oil tank 16 and is connected to the first outlet pipe 17. A first return pipe 25 is connected to the bottom of the waste oil tank 16 and is connected to the oil separator 3. A coalescer 20 and a seventh control valve 26 are installed on the first return pipe 25.

[0037] A fourth control valve 18 is installed on the first outlet pipe 17, a fifth control valve 19 is installed on the first inlet pipe, the inlet of the second pump 28 is connected to a first connecting pipe 21, the first connecting pipe 21 is connected between the first outlet pipe 17 and the first inlet pipe, a twentieth control valve 22 is installed on the first connecting pipe 21, the outlet of the second pump 28 is connected to a second connecting pipe, the second connecting pipe is connected to the clean oil tank 27, and a sixth control valve 29 is installed on the second connecting pipe.

[0038] In this embodiment, the oil phase outlet of the waste oil tank 16 is connected to the reaction tank 38 in sequence via a discharge pipe, a third pump, and a connecting pipe. Two control valves are installed on the discharge pipe, with a certain distance between them. The position between the two control valves is connected to the clean oil tank 27 via a connecting pipe, and a control valve is installed on the connecting pipe.

[0039] For specific references Figure 2 The waste oil tank 16 is connected to a first discharge pipe 31. The wastewater treatment device also includes a third pump 30. The inlet of the third pump 30 is connected to a third connecting pipe, which is connected to the first discharge pipe 31. A fourth connecting pipe 36 is connected between the first discharge pipe 31 and the third connecting pipe. The fourth connecting pipe 36 is connected to the clean oil tank 27. An eighth control valve 33 is installed on the first discharge pipe 31. A ninth control valve 37 is installed on the third connecting pipe. A tenth control valve 34 is installed on the fourth connecting pipe 36. The outlet of the third pump 30 is connected to a fifth connecting pipe 32. An eleventh control valve 35 is installed on the fifth connecting pipe 32.

[0040] In this embodiment, two reaction vessels 38 are provided, and the two reaction vessels 38 are arranged in parallel. The inlet pipe and outlet pipe of the reaction vessel 38 are also connected through a reflux pipe, and a control valve is provided on the reflux pipe.

[0041] Reactor 38 contains activated alumina. One reactor 38 contains a clay bed, and the other contains a regeneration bed. In the reactor 38 with the regeneration bed, the activated alumina acts as a regenerator for anthraquinone degradation products in the hydrogenation solution, ensuring the continuity and efficiency of the production process. In the reactor 38 with the clay bed, the activated alumina not only regenerates any anthraquinone degradation products that may be generated, but also adsorbs potassium carbonate solution droplets in the working fluid, further improving the quality of the hydrogen peroxide. By using two reactors 38, continuous processing of the oil phase can be achieved.

[0042] Specifically, the reaction tank 38 is connected to a second oil inlet pipe 39 and a second oil outlet pipe 40. The second oil inlet pipe 39 is connected to a fifth connecting pipe 32. The wastewater treatment device also includes an oil outlet main pipe, on which an eighteenth control valve 43 is installed. The clean oil tank 27 is connected to the oil outlet main pipe via a third oil inlet pipe 46. The second oil outlet pipe 40 is connected to the third oil inlet pipe 46. The third oil inlet pipe 46 is equipped with a seventeenth switch valve 47. The second oil inlet pipe 39 and the second oil outlet pipe 40 are respectively equipped with a twelfth control valve 41 and a thirteenth control valve 42. The second oil inlet pipe 39 and the second oil outlet pipe 40 are connected to a second return pipe 44, on which a fourteenth control valve 45 is installed. The fifth connecting pipe 32 and the first connecting pipe 21 are connected to a sixth connecting pipe, on which a sixteenth control valve is installed.

[0043] The hydrogen peroxide device also includes several mixing tanks 12 for preparing hydrogen peroxide. A seventh connecting pipe 23 is connected to the mixing tank 12. The seventh connecting pipe 23 is connected to the first connecting pipe 21. A fifteenth control valve 24 is installed on the seventh connecting pipe 23.

[0044] The working principle of the hydrogen peroxide device emission recovery and treatment provided in this embodiment is as follows:

[0045] In use, the acidic tank 50, alkaline tank 60, emergency pool 2 and oil separator 3 are enclosed by a shed 1, and the internal gas is extracted by a blower 8 and sent to the high altitude or inlet of the incinerator 11 through the chimney 10 for treatment to prevent the VOCs around the hydrogen peroxide from exceeding the standard.

[0046] By opening the fourth control valve 18, the fifth control valve 19, the first pump 13, and the corresponding nineteenth control valve 15, the oil in the oil phase of the oil separator 3 is pumped into the waste oil tank 16. After the working fluid in the waste oil tank 16 has settled, the seventh control valve 26 is opened to allow the aqueous phase in the waste oil tank 16 to enter the coalescer 20 and then flow back into the oil separator 3. The third pump 30, the eighth control valve 33, the tenth control valve 34, the eleventh control valve 35, and the corresponding twelfth control valve 41 are opened to pump the oil in the waste oil tank 16 into the reaction tank 38 containing alumina. Then, circulation is established. When the oil in the reaction tank 38 is clean or the pressure in the reaction tank 38 rises to a certain value, the alumina is treated as a clay bed. The seventeenth switch valve 47 is opened to discharge the clean oil into the clean oil tank, completing the waste oil treatment work.

[0047] A first detection point for detecting oil cleanliness is set between the fourth control valve 18 and the fifth control valve 19, a second detection point is set on the fifth connecting pipe 32, and a third detection point is set on the second oil outlet pipe 40.

[0048] During the waste oil treatment process, when the oil detected at the first detection point is clean, the fifth control valve 19 is closed, and the twentieth control valve 22, the second pump 28, and the sixth control valve 29 are opened to pump the clean oil into the clean oil tank 27. When the oil detected at the second detection point is clean, the twelfth control valve 41 is closed, and the sixteenth control valve, the second pump 28, and the sixth control valve 29 are opened to pump the clean oil into the clean oil tank 27. When the oil detected at the third detection point is not clean, the seventeenth switch valve 47 is closed, and the fourteenth control valve 45 is opened to allow the unclean oil to re-enter the reaction tank 38 for purification treatment.

[0049] Close the fifth control valve 19 and the nineteenth control valve 15 corresponding to the oil in the oil separator 3, and open the nineteenth control valve 15 and the twentieth control valve 22 corresponding to the water, as well as the corresponding fifteenth control valve 24, so that the preparation vessel 12 can accept wastewater and realize the secondary utilization and recycling of water.

[0050] Example 2

[0051] In a typical embodiment of the present invention, a method for recovering and treating emissions from a hydrogen peroxide device is provided, comprising:

[0052] The oil in the oil phase of the oil separator is pumped into the waste oil tank. After settling, the water in the waste oil tank is returned to the oil separator. The oil in the waste oil tank is pumped into the reaction tank for treatment. The clean oil after treatment is transferred to the clean oil tank.

[0053] If the oil cleanliness detected by the oil cleanliness detector on the pipeline connecting the extraction pipe and the waste oil tank is qualified, the oil is directly transferred to the clean oil tank; otherwise, it is transferred to the waste oil tank.

[0054] If the cleanliness of the oil detected by the oil cleanliness detector on the pipeline connecting the waste oil tank and the reaction tank is qualified, the oil is directly transferred to the clean oil tank; otherwise, it is transferred to the reaction tank.

[0055] If the oil cleanliness detected by the oil cleanliness detector on the oil outlet pipeline of the reaction tank is qualified, the oil is directly transported to the clean oil tank. If it is not qualified, it is returned to the reaction tank for purification again until it is qualified and then transported to the clean oil tank.

[0056] Furthermore, the water in the aqueous phase of the oil separator is pumped to the preparation vessel for recycling.

[0057] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A hydrogen peroxide device emission recovery and treatment system, characterized in that, The system includes a waste gas treatment device and a wastewater treatment device. The waste gas treatment device includes two sheds: one shed covers an emergency pool and an oil separator, and the other shed covers an acidic tank and an alkaline tank. The two sheds are connected to an incinerator or a chimney via extraction pipes. The wastewater treatment device includes a waste oil tank, a reaction tank, and a clean oil tank. The oil separator is connected to the waste oil tank via a liquid extraction pipe. The aqueous phase outlet of the waste oil tank is connected to the oil separator via a return pipe. The oil phase outlet of the waste oil tank is connected to the reaction tank containing activated alumina. The clean oil outlet of the reaction tank is connected to the clean oil tank. Oil cleanliness detection points are installed on the pipes connecting the liquid extraction pipe to the waste oil tank, the pipes connecting the waste oil tank to the reaction tank, and the oil outlet pipe of the reaction tank. The reaction vessel is provided in two parallel configurations. The inlet and outlet pipes of the reaction vessel are also connected by a reflux pipe, which is equipped with a control valve. One of the reaction vessels is equipped with a clay bed, and the other reaction vessel is equipped with a regeneration bed; A coalescer is installed on the return pipe connecting the waste oil tank and the oil separator; The liquid extraction pipe is connected to the liquid outlet pipe via the first pump, and the liquid outlet pipe is connected to the waste oil tank via the oil inlet pipe. Both the liquid outlet pipe and the oil inlet pipe are equipped with control valves. The two control valves are spaced a certain distance apart. The position between the two control valves is connected to the clean oil tank via a connecting pipe. The connecting pipe is equipped with a control valve and a second pump. The connecting pipe is also connected to the preparation vessel via a pipeline.

2. The hydrogen peroxide device emission recovery and treatment system as described in claim 1, characterized in that, The exhaust pipe is equipped with a control valve, and the exhaust pipe is connected to the incinerator or chimney via an intake pipe. The intake pipe is equipped with a fan and an intake valve.

3. The hydrogen peroxide device emission recovery and treatment system as described in claim 1, characterized in that, There are two extraction pipes, which are respectively connected to the oil phase and the water phase in the oil separator. Each extraction pipe is equipped with a control valve.

4. The hydrogen peroxide device emission recovery and treatment system as described in claim 1, characterized in that, The oil phase outlet of the waste oil tank is connected to the reaction tank in sequence via a discharge pipe, a third pump, and a connecting pipe. Two control valves are installed on the discharge pipe, with a certain distance between them. The position between the two control valves is connected to the clean oil tank via a connecting pipe, which is also equipped with a control valve.

5. A method for recovering and treating emissions from a hydrogen peroxide plant, implemented using the hydrogen peroxide plant emission recovery and treatment system as described in any one of claims 1-4, characterized in that, include: The oil in the oil phase of the oil separator is pumped into the waste oil tank. After settling, the water in the waste oil tank is returned to the oil separator. The oil in the waste oil tank is pumped into the reaction tank for treatment; the treated clean oil is then transferred to the clean oil tank. If the oil cleanliness detected by the oil cleanliness detector on the pipeline connecting the extraction pipe and the waste oil tank is qualified, the oil is directly transferred to the clean oil tank; otherwise, it is transferred to the waste oil tank. If the cleanliness of the oil detected by the oil cleanliness detector on the pipeline connecting the waste oil tank and the reaction tank is qualified, the oil is directly transferred to the clean oil tank; otherwise, it is transferred to the reaction tank. If the oil cleanliness detected by the oil cleanliness detector on the oil outlet pipeline of the reaction tank is qualified, the oil is directly transported to the clean oil tank. If it is not qualified, it is returned to the reaction tank for purification again until it is qualified and then transported to the clean oil tank.

6. The method for recovering and treating emissions from a hydrogen peroxide device as described in claim 5, characterized in that, The water in the aqueous phase of the oil separator is pumped to the preparation vessel for recycling.

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