Treatment device for purifying oil phase in POSM process

Abstract

The utility model provides a treatment device for purifying an oil phase in a POSM process, which comprises a primary separation unit, a secondary separation unit and a recycling unit, an oil discharge port of the primary separation unit is communicated with the recycling unit through an oil phase collecting bag and a first oil conveying pipeline in sequence, an exhaust port of the primary separation unit is communicated with gas treatment equipment through a first exhaust pipeline, and a water outlet of the primary separation unit is communicated with a water inlet of the secondary separation unit through a conveying pipeline; an oil outlet of the second-stage separation unit is communicated with the recycling unit through a second oil conveying pipeline, an exhaust port of the second-stage separation unit is communicated with gas treatment equipment through a second exhaust pipeline, and a water outlet of the second-stage separation unit is communicated with water treatment equipment through a water conveying pipeline. Through the synergistic effect of the primary separation unit, the secondary separation unit and the recycling unit, the oil phase in the wastewater is effectively separated, purified and recycled.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a processing device for purifying an oil phase in a POSM process. Background Art

[0002] POSM (Propylene Oxide and Styrene Monomer) process is an important process for producing propylene oxide (PO) and styrene monomer (SM). Wastewater containing oil phase is inevitably generated during the production process. The oil phase in the wastewater may include unreacted raw materials, reaction products, etc.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] At present, these wastewaters containing oil phase are usually discharged directly to sewage treatment plants for treatment. However, this treatment method not only causes waste of resources, but also increases the burden on sewage treatment plants.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a treatment device for purifying the oil phase in the POSM process, so as to solve the technical problem that the wastewater containing the oil phase generated by the POSM process in the prior art is directly discharged to the sewage treatment plant for treatment, resulting in waste of resources and increasing the burden of the sewage treatment plant. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a processing device for purifying an oil phase in a POSM process, comprising a primary separation unit, a secondary separation unit and a recycling unit, wherein a water inlet of the primary separation unit is connected to a water outlet of a wastewater pipeline, an oil discharge port of the primary separation unit is connected to the recycling unit via an oil phase collection bag and a first oil delivery pipeline in sequence, an exhaust port of the primary separation unit is connected to a gas treatment device via a first exhaust pipeline, a water outlet of the primary separation unit is connected to a water inlet of the secondary separation unit via a delivery pipeline, an oil discharge port of the secondary separation unit is connected to the recycling unit via a second oil delivery pipeline, an exhaust port of the secondary separation unit is connected to a gas treatment device via a second exhaust pipeline, and a water outlet of the secondary separation unit is connected to a water treatment device via a water delivery pipeline.

[0009] Preferably, the primary separation unit is arranged horizontally, and has a first accommodating chamber, in which a demulsification separation filter is arranged, and the demulsification separation filter occupies 20% to 60% of the space in the first accommodating chamber.

[0010] Preferably, the demulsification and separation filtration section comprises a demulsification and separation filter element, and the demulsification and separation filter elements are multiple in number and arranged in parallel.

[0011] Preferably, the secondary separation unit is arranged vertically, and has a second accommodating chamber, in which an oleophilic and hydrophobic filter portion is arranged, and the oleophilic and hydrophobic filter portion occupies 35% to 75% of the space in the second accommodating chamber.

[0012] Preferably, the oleophilic-hydrophobic filter portion comprises an oleophilic-hydrophobic filter element, and the oleophilic-hydrophobic filter element is multiple in number and arranged in parallel.

[0013] Preferably, the recycling unit includes an oil storage tank and a gas chromatograph, the oil discharge port of the primary separation unit is connected to the oil storage tank through an oil phase collection bag and a first oil pipeline in sequence, the oil discharge port of the primary separation unit is connected to the oil storage tank through an oil phase collection bag and a first oil pipeline in sequence, and the oil storage tank is connected to the gas chromatograph through an oil extraction pipeline.

[0014] Preferably, the first oil pipeline, the second oil pipeline, the delivery pipeline, the water pipeline, the oil extraction pipeline, the first exhaust pipeline and the second exhaust pipeline are respectively provided with control valves and drive pumps.

[0015] The preferred technical solution of the utility model can also produce at least the following technical effects:

[0016] The utility model effectively avoids the technical problem that the wastewater containing oil phase generated by the POSM process in the prior art is directly discharged to the sewage treatment plant for treatment, which causes waste of resources and also increases the burden of the sewage treatment plant. The utility model provides a processing device for purifying the oil phase in the POSM process, including a primary separation unit, a secondary separation unit and a recycling unit, the water inlet of the primary separation unit is connected with the water outlet of the wastewater pipeline, the oil discharge port of the primary separation unit is connected with the recycling unit through the oil phase collection bag and the first oil pipeline in sequence, the exhaust port of the primary separation unit is connected with the gas treatment equipment through the first exhaust pipeline, the water outlet of the primary separation unit is connected with the water inlet of the secondary separation unit through the delivery pipeline, the oil discharge port of the secondary separation unit is connected with the recycling unit through the second oil pipeline, the exhaust port of the secondary separation unit is connected with the gas treatment equipment through the second exhaust pipeline, and the water outlet of the secondary separation unit is connected with the water treatment equipment through the water pipeline. The utility model uses the synergistic effect of the primary separation unit, the secondary separation unit and the recycling unit. The wastewater enters the primary separation unit through the wastewater pipeline. After preliminary separation, the oil phase enters the recycling unit through the first oil pipeline, and the gas enters the gas treatment equipment through the first exhaust pipeline. Then, the wastewater treated by the primary separation unit enters the secondary separation unit for further separation, the remaining oil phase enters the recycling unit through the second oil pipeline, the gas enters the gas treatment equipment through the second exhaust pipeline, and the water phase after two separations enters the water treatment equipment through the water pipeline, and can also be directly discharged to the sewage treatment plant, so as to achieve the effective separation, purification and recycling of the oil phase in the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a processing device for purifying the oil phase in a POSM process provided by the utility model;

[0019] In the figure:

[0020] 1. Primary separation unit; 101. First water inlet chamber; 102. First water outlet chamber; 103. Demulsification separation box; 104. Demulsification separation filter element; 105. Oil phase collection bag; 2. Secondary separation unit; 201. Second water inlet chamber; 202. Oil outlet chamber; 203. Oleophilic and hydrophobic box; 204. Oleophilic and hydrophobic filter element; 3. Oil storage tank; 4. Gas chromatograph; 5. Gas treatment equipment; 6. Water treatment equipment; 7. Wastewater pipeline; 8. First oil pipeline; 9. Second oil pipeline; 10. Delivery pipeline; 11. Water pipeline; 12. Oil extraction pipeline; 13. First exhaust pipeline; 14. Second exhaust pipeline; 15. Control valve; 16. Drive pump. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0022] like Figure 1 As shown, the utility model provides a processing device for purifying the oil phase in the POSM process, including a primary separation unit 1, a secondary separation unit 2 and a recycling unit, the water inlet of the primary separation unit 1 is connected to the water outlet of the wastewater pipeline 7, the oil discharge port of the primary separation unit 1 is connected to the recycling unit through the oil phase collection bag 105 and the first oil pipeline 8 in sequence, the exhaust port of the primary separation unit 1 is connected to the gas treatment equipment 5 through the first exhaust pipeline 13, the water outlet of the primary separation unit 1 is connected to the water inlet of the secondary separation unit 2 through the delivery pipeline 10, the oil discharge port of the secondary separation unit 2 is connected to the recycling unit through the second oil pipeline 9, the exhaust port of the secondary separation unit 2 is connected to the gas treatment equipment 5 through the second exhaust pipeline 14, and the water outlet of the secondary separation unit 2 is connected to the water treatment equipment 6 through the water pipeline 11.

[0023] In the utility model, through the synergistic effect of the primary separation unit 1, the secondary separation unit 2 and the recycling unit, wastewater enters the primary separation unit 1 through the wastewater pipeline 7, and after preliminary separation, the oil phase enters the recycling unit through the first oil pipeline 8, and the gas enters the gas treatment device 5 through the first exhaust pipeline 13. Then, the wastewater treated by the primary separation unit 1 enters the secondary separation unit 2 for further separation, the remaining oil phase enters the recycling unit through the second oil pipeline 9, the gas enters the gas treatment device 5 through the second exhaust pipeline 14, and the water phase after two separations enters the water treatment device 6 through the water pipeline 11, and can also be directly discharged to the sewage treatment plant, so as to achieve the effective separation, purification and recycling of the oil phase in the wastewater.

[0024] As an optional embodiment, the primary separation unit 1 is horizontally arranged and has a first accommodating chamber, in which a demulsification separation filter is arranged, and the demulsification separation filter occupies 20% to 60% of the space in the first accommodating chamber.

[0025] Furthermore, the demulsification and separation filter unit is arranged in the middle position of the first accommodating chamber, and the demulsification and separation filter unit divides the first accommodating chamber into a first water inlet chamber 101 and a first water outlet chamber 102. The water inlet of the demulsification and separation filter unit is connected to the first water inlet chamber 101, and the water outlet of the demulsification and separation filter unit is connected to the first water outlet chamber 102.

[0026] The oil phase collection bag 105 is arranged on the top of the first water outlet cavity 102, and is made of oleophilic and hydrophobic materials in the prior art such as modified polyurethane foam, which further promotes the aggregation and enlargement of oil droplets.

[0027] When the wastewater containing oil phase flows through the demulsification and separation filter, the oil droplets in the wastewater will be adsorbed and gathered by the demulsification and separation filter, gradually changing from small oil droplets to large oil droplets. As the wastewater flows, the gathered oil droplets will continue to break away from the demulsification and separation filter to form larger oil droplets, thereby achieving effective separation of oil and water, and preliminarily separating the oil phase in the wastewater.

[0028] As an optional implementation, the demulsification and separation filtering part includes a demulsification and separation filter element 104 . There are multiple demulsification and separation filter elements 104 , which are arranged in parallel in the demulsification and separation box 103 .

[0029] Furthermore, the demulsification separation filter element 104 is filled with existing technical materials such as polypropylene and polyester fibers that have a high affinity and adsorption capacity for the oil phase, and effective separation of oil and water is achieved through the principle of density difference.

[0030] The water inlet of the demulsification separation filter element 104 is communicated with the first water inlet chamber 101, and the water outlet of the demulsification separation filter element 104 is communicated with the first water outlet chamber 102. Since the demulsification separation filter element 104 is arranged in parallel, the oil phase separation efficiency is improved.

[0031] When the wastewater passes through the demulsification separation filter element 104, the oil droplets in the wastewater will be adsorbed and gathered by the demulsification separation filter element 104, gradually changing from small oil droplets to large oil droplets. As the wastewater flows, the gathered oil droplets will continue to break away from the demulsification separation filter element 104, forming larger oil droplets, and initially achieving separation of the oil phase.

[0032] Then, the wastewater treated by the demulsification separation filter element 104 enters the first water outlet chamber 102, and the oil droplets gradually rise during the flow, so that the oil droplets enter the oil phase collection bag 105, further aggregate to form larger oil droplets, and the separated oil phase enters the recycling unit through the first oil pipeline 8.

[0033] As an optional embodiment, the secondary separation unit 2 is vertically arranged and has a second accommodating chamber, in which an oleophilic and hydrophobic filter portion is arranged, and the oleophilic and hydrophobic filter portion occupies 35% to 75% of the space in the second accommodating chamber.

[0034] Further, the lipophilic and hydrophobic filter part is arranged in the middle of the second accommodating chamber, the lipophilic and hydrophobic filter part separates the second accommodating chamber into a second water inlet chamber 201 and an oil outlet chamber 202, the water inlet of the lipophilic and hydrophobic filter part is connected with the second water inlet chamber 201, and the water outlet of the demulsification and separation filter part is connected with the oil outlet chamber 202. The water inlet and the water outlet of the secondary separation unit 2 are both arranged at the bottom of the second water inlet chamber 201.

[0035] When the wastewater treated by the primary separation unit 1 passes through the lipophilic and hydrophobic filter section, the lipophilic and hydrophobic filter section only allows the oil phase to pass smoothly and enter the oil outlet chamber 202, and then enter the recycling unit through the second oil pipeline 9, while the water phase is intercepted in the second water inlet chamber 201 and cannot pass through the lipophilic and hydrophobic filter section. It enters the water treatment equipment 6 through the water pipeline 11 to achieve further oil phase separation.

[0036] As an optional implementation, the oleophilic-hydrophobic filter unit includes an oleophilic-hydrophobic filter element 204 . There are multiple oleophilic-hydrophobic filter elements 204 , which are arranged in parallel in the oleophilic-hydrophobic tank 203 .

[0037] Furthermore, the oleophilic and hydrophobic filter element 204 is filled with the oleophilic and hydrophobic material in the prior art, which has a strong affinity for the oil phase, so that the oil droplets can be quickly adsorbed and fixed on the oleophilic and hydrophobic filter element 204, and then smoothly flow into the oil outlet cavity 202. As for the water phase, due to the hydrophobicity of the oleophilic and hydrophobic filter element 204, the water phase is effectively excluded from the oleophilic and hydrophobic filter element 204 and cannot pass further.

[0038] The oil inlet of the oleophilic and hydrophobic filter element 204 is connected to the second water inlet chamber 201, and the oil outlet of the oleophilic and hydrophobic filter element 204 is connected to the oil outlet chamber 202. Since the oleophilic and hydrophobic filter elements 204 are arranged in parallel, the oil phase separation efficiency is improved.

[0039] When the wastewater passes through the oleophilic and hydrophobic filter element 204, the oil droplets in the wastewater are quickly adsorbed and fixed on the oleophilic and hydrophobic filter element 204, and then smoothly flows into the oil outlet cavity 202, and then enters the recycling unit through the second oil pipeline 9, further realizing oil phase separation. The water phase enters the water treatment equipment 6 through the water pipeline 11.

[0040] As an optional embodiment, the recycling unit includes an oil storage tank 3 and a gas chromatograph 4, the oil discharge port of the primary separation unit 1 is connected to the oil storage tank 3 via the oil phase collection bag 105 and the first oil pipeline 8 in sequence, the oil discharge port of the primary separation unit 1 is connected to the oil storage tank 3 via the oil phase collection bag 105 and the first oil pipeline 8 in sequence, and the oil storage tank 3 is connected to the gas chromatograph 4 via the oil extraction pipeline 12.

[0041] Furthermore, the oil storage tank 3 is used to store the separated oil phase for subsequent processing and utilization. The oil extraction port of the oil storage tank 3 is arranged at the lower part thereof, and the oil extraction port is connected to the gas chromatograph 4 through the oil extraction pipeline 12 .

[0042] The gas chromatograph 4 is used to perform chemical analysis on the oil phase in the oil storage tank 3 to provide data support for subsequent utilization or treatment of the oil phase.

[0043] Through the cooperation of the oil storage tank 3 and the gas chromatograph 4, efficient recovery and chemical analysis of the oil phase in the wastewater are achieved.

[0044] As an optional implementation, the wastewater pipeline 7, the first oil pipeline 8, the second oil pipeline 9, the delivery pipeline 10, the water pipeline 11, the oil extraction pipeline 12, the first exhaust pipeline 13 and the second exhaust pipeline 14 are respectively provided with a control valve 15 and a drive pump 16.

[0045] The control valve 15 is used to control the opening, closing, flow rate, pressure and flow direction of the above pipeline to adapt to different processing requirements.

[0046] The driving pump 16 is used to provide a power source for the above pipelines, and the driving fluid can flow according to a predetermined path and speed.

[0047] The control valve 15 and the driving pump 16 adopt the existing technology, which will not be described in detail here.

[0048] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0049] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "an example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A processing device for purifying the oil phase in the POSM process, characterized in that: It includes a primary separation unit, a secondary separation unit and a recycling unit, wherein the water inlet of the primary separation unit is connected to the water outlet of the wastewater pipeline, the oil discharge port of the primary separation unit is connected to the recycling unit through an oil phase collection bag and a first oil pipeline in sequence, the exhaust port of the primary separation unit is connected to a gas treatment device through a first exhaust pipeline, the water outlet of the primary separation unit is connected to the water inlet of the secondary separation unit through a delivery pipeline, the oil discharge port of the secondary separation unit is connected to the recycling unit through a second oil pipeline, the exhaust port of the secondary separation unit is connected to the gas treatment device through a second exhaust pipeline, and the water outlet of the secondary separation unit is connected to a water treatment device through a water pipeline.

2. A treatment device for purifying oil phase in a POSM process according to claim 1, characterized in that, The primary separation unit is arranged horizontally and has a first accommodating chamber, in which a demulsification separation filter is arranged, and the demulsification separation filter occupies 20% to 60% of the space in the first accommodating chamber.

3. A treatment device for purifying oil phase in a POSM process according to claim 2, characterized in that, The demulsification and separation filtering part comprises a demulsification and separation filter element, and the demulsification and separation filter elements are multiple in number and arranged in parallel.

4. A treatment device for purifying oil phase in a POSM process according to claim 1, characterized in that, The secondary separation unit is vertically arranged and has a second accommodating chamber, in which an oleophilic and hydrophobic filter is arranged, and the oleophilic and hydrophobic filter occupies 35% to 75% of the space in the second accommodating chamber.

5. A treatment device for purifying oil phase in a POSM process according to claim 4, characterized in that, The oleophilic and hydrophobic filter portion includes a plurality of oleophilic and hydrophobic filter elements, which are arranged in parallel.

6. A processing device for purifying the oil phase in a POSM process according to claim 1, characterized in that: The recycling unit includes an oil storage tank and a gas chromatograph. The oil discharge port of the primary separation unit is connected to the oil storage tank through an oil phase collection bag and a first oil pipeline in sequence. The oil discharge port of the primary separation unit is connected to the oil storage tank through an oil phase collection bag and a first oil pipeline in sequence. The oil storage tank is connected to the gas chromatograph through an oil extraction pipeline.

7. A processing device for purifying the oil phase in a POSM process according to claim 6, characterized in that: The first oil pipeline, the second oil pipeline, the delivery pipeline, the water pipeline, the oil extraction pipeline, the first exhaust pipeline and the second exhaust pipeline are respectively provided with control valves and drive pumps.

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