Remaining water resource recycling system for epichlorohydrin rectifying still
By combining a security filter, an electrodialysis unit, and a membrane concentration unit, the problem of unreusable residual water in the distillation kettle during epichlorohydrin production was solved, achieving the separation and recovery of organic matter and high saline water, reducing wastewater treatment costs, and improving resource utilization.
Patent Information
- Application Number
- CN202423198847.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In the production of epichlorohydrin, the residual water generated in the distillation kettle cannot be effectively recovered and reused, resulting in increased wastewater treatment costs and resource waste.
The system, consisting of a security filter, an electrodialysis unit, and a membrane concentration unit, separates and recovers organic matter and high salinity from the residual water in the distillation kettle through filtration, electrodialysis, and membrane concentration technologies, thereby enabling resource reuse.
This technology enables the resource recovery of residual water from the distillation kettle, reducing wastewater treatment costs and improving the utilization rate of water resources and organic matter.
Smart Images
Figure CN223705406U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wastewater filtration recycling technical field, specifically, relate to a kind of epoxy chloropropane rectifying still residual water resource recovery system. BACKGROUND
[0002] In the production process of epoxy chloropropane, main process includes: epoxidation reaction process, pretreatment process, continuous washing process, pretreatment water layer extraction process, washing oil layer rectification process, extraction residual water layer rectification process and refining process, wherein extraction residual water layer rectification process will produce rich organic matter (methanol, glycerol, glycerol monomethyl ether etc.) rectifying still residual water, general existing treatment process is to the rectifying still residual water by primary reverse osmosis device to recover part of water, remaining most high-salinity water, organic matter (methanol, glycerol, glycerol monomethyl ether etc.) is generally discharged to the sewage station of factory area to be handled, directly discharging to the sewage station to be handled can increase sewage treatment cost, and most of water resource, organic matter cannot be recycled. SUMMARY
[0003] The utility model provides a kind of epoxy chloropropane rectifying still residual water resource recovery system, solve the problem that waste water generated in the production process of epoxy ammonia propyl alcohol cannot be purified in relevant technology Reuse.
[0004] The technical scheme of the utility model is as follows:
[0005] A kind of epoxy chloropropane rectifying still residual water resource recovery system is used for epoxy chloropropane rectifying still wastewater recovery, and it includes:
[0006] Security filter one, the security filter one is used to filter solid impurities in waste water,
[0007] Electrodialysis device, the electrodialysis device and the security filter one are communicated, and the electrodialysis device is used to separate organic matter and high-salinity water in waste water,
[0008] Filtering device one, the filtering device one and the electrodialysis device are communicated by booster pump one,
[0009] Membrane concentration piece one, the membrane concentration piece one and the filtering device one are communicated by high-pressure pump two, and the membrane concentration piece one is used to separate water and organic matter in waste water.
[0010] Optionally, the electrodialysis device includes:
[0011] Electrodialysis piece, the electrodialysis piece and the security filter one are communicated, and the electrodialysis piece has water outlet one and water outlet two, and the water outlet one is used to discharge high-salinity water,
[0012] Water tank one, the water tank one and the water outlet two are communicated.
[0013] Optionally, the membrane concentration device has a water outlet three for discharging organic matter and a water outlet four for discharging filtered water.
[0014] Optionally, the system further comprises a water tank two, which is in communication with the water outlet four.
[0015] Optionally, the system further comprises a water tank three for adjusting and buffering the waste water of the epichlorohydrin rectifying kettle and a filtering device two, which comprises:
[0016] an ultrafiltration device one, which is in communication with the water tank three through the booster pump three,
[0017] a water tank four, which is in communication with the ultrafiltration device one,
[0018] a security filter two, which is in communication with the water tank four through the booster pump four.
[0019] Optionally, the system further comprises a membrane concentration device, which comprises:
[0020] a membrane concentration device two, which is in communication with the security filter two through a high-pressure pump five, and has a water outlet five and a water outlet six, wherein the water outlet five is in communication with the water tank two,
[0021] a water tank five, which is in communication with the water outlet six and the security filter one through a high-pressure pump six.
[0022] Optionally, the filtering device one comprises:
[0023] an ultrafiltration device two, which is in communication with the water tank one through a booster pump one,
[0024] a water tank six, which is in communication with the ultrafiltration device two,
[0025] a security filter three, which is in communication with the water tank six through a high-pressure pump seven and the membrane concentration device one through the high-pressure pump two.
[0026] The working principle and beneficial effects of the utility model are as follows:
[0027] The utility model discloses, in order to solve the problem that the wastewater produced in the production process of epoxy aminopropane cannot be purified and reused in the prior art, the wastewater of epoxy chloropropane rectifying kettle after primary membrane concentration is concentrated again, the wastewater of epoxy chloropropane rectifying kettle after primary membrane concentration can extract the wastewater containing high concentration organic matter, the solid impurities in the wastewater are filtered through the security filter no. 1, then pass through the electrodialysis device, under the action of the electric field of the electrodialysis device, the high salt water in the wastewater is separated, the high salt water after separation is treated by wet oxidation, the remaining wastewater containing high concentration organic matter is filtered again through the filtering device no. 1 and enters the membrane concentration part no. 1, the wastewater is decomposed into concentrated water and production water by the membrane concentration part no. 1, the concentrated water is mainly organic matter (glycerol, glycerol monomethyl ether etc.), the concentrated water is treated by three-effect evaporation and rectification, the concentrated water is separated and purified, realizing the reuse of the organic matter in the concentrated water, and the main function of the high-pressure pump is to pressurize the wastewater in the pipeline, so that the wastewater enters the next process. BRIEF DESCRIPTION OF DRAWINGS
[0028] The above-mentioned features, technical characteristics, advantages and implementation modes of the utility model will be further described in a clear and understandable manner in combination with the preferred embodiments and the attached drawings.
[0029] Fig. 1 It is the schematic diagram of the utility model;
[0030] Fig. 2 It is the flow chart of the utility model.
[0031] In the drawing: 1, security filter no. 1, 2, electrodialysis device, 3, filtering device no. 1, 4, membrane concentration part no. 1, 101, electrodialysis part, 102, water tank no. 1, 5, water tank no. 2, 6, water tank no. 3, 7, filtering device no. 2, 701, ultrafiltration part no. 1, 702, water tank no. 4, 703, security filter no. 2, 8, membrane concentration device, 801, membrane concentration part no. 2, 802, water tank no. 5, 301, ultrafiltration part no. 2, 302, water tank no. 6, 303, security filter no. 3. DETAILED DESCRIPTION
[0032] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the specific implementation mode of the utility model will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings and other implementation modes according to these drawings without creating creative labor.
[0033] For the sake of simple and clear of the drawings, only the parts related to the utility model are shown in the drawings, and they do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".
[0034] In this article, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0035] In addition, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.
[0036] Reference Figs. 1-2 For the first embodiment of the utility model, an epoxy chloropropane rectifying still wastewater resource recycling system is proposed for recycling of epoxy chloropropane rectifying still wastewater, which comprises a safety filter 1 for filtering solid impurities in wastewater, an electrodialysis device 2 in communication with the safety filter 1, the electrodialysis device 2 for separating organic matter and high-salt water in wastewater, a filter device 3 in communication with the electrodialysis device 2 through a booster pump 1, a membrane concentration unit 4 in communication with the filter device 3 through a high-pressure pump 2, and the membrane concentration unit 4 for separating water and organic matter in wastewater.
[0037] In this embodiment, in order to solve the problem that the wastewater generated in the production process of epoxy aminopropane cannot be purified and reused in the related art, the wastewater from the epoxy chloropropane rectifying still after primary membrane concentration is concentrated again, the wastewater from the epoxy chloropropane rectifying still after primary membrane concentration is extracted, the solid impurities in the wastewater are filtered through the security filter 1, then the high-salt water in the wastewater is separated under the action of the electric field of the electrodialysis device 2, the separated high-salt water is subjected to wet oxidation treatment, and the remaining wastewater containing high-concentration organic matter is filtered again through the filtering device 1 and enters the membrane concentration component 4, the wastewater is decomposed into concentrated water and product water by the membrane concentration component 4, the concentrated water is mainly composed of organic matter (glycerol, glycerol monomethyl ether, etc.), the concentrated water is subjected to three-effect evaporation and rectification treatment, the concentrated water is separated and purified, the organic matter in the concentrated water is reused, and the high-pressure pump is mainly used to pressurize the wastewater in the pipeline, so that the wastewater enters the next process.
[0038] Further, the electrodialysis device 2 comprises an electrodialysis component 101, the electrodialysis component 101 is in communication with the security filter 1, and the electrodialysis component 101 has a water outlet 1 and a water outlet 2, the water outlet 1 is used to discharge high-salt water, and a water tank 1 102 is in communication with the water outlet 2.
[0039] In this embodiment, the electrodialysis device 2 mainly comprises the electrodialysis component 101 and the water tank 1 102, the concentrated water in the security filter 1 enters the electrodialysis component 101, and under the action of the electric field, the concentrated water is separated from the organic matter and the high-salt water under the action of the electric field, the high-salt water is discharged from the water outlet 1 and subjected to wet oxidation treatment, the organic matter is discharged from the water outlet 2 and enters the water tank 1 102 and enters the next process.
[0040] Further, the membrane concentration component 4 has a water outlet 3 and a water outlet 4, the water outlet 3 is used to discharge the organic matter, and the water outlet 4 is used to discharge the filtered water.
[0041] In this embodiment, the membrane concentration component 4 uses a reverse osmosis membrane element to concentrate the wastewater, the water entering the membrane concentration component 4 is mainly composed of organic matter, and the reverse osmosis membrane element is used to concentrate the organic matter. The concentrated water containing a large amount of organic matter is discharged from the water outlet 3, glycerol and glycerol monomethyl ether can be recovered through the three-effect evaporation + rectification equipment in the factory, and the product water is discharged from the water outlet 4 and enters the next process.
[0042] Further, the water tank 2 5 is in communication with the water outlet 4.
[0043] In the embodiment, the water tank two 5 is arranged, the water tank two 5 is communicated with the water outlet four, and the produced water filtered by the membrane concentration component one 4 is collected; the water in the water tank two 5 can be returned to the pretreatment process and the oil layer washing process in the epichlorohydrin production process to realize recycling.
[0044] Further, the water tank three 6 and the filtering device two 7 are further included; the water tank three 6 is used for adjusting and buffering the epichlorohydrin rectifying still wastewater; the filtering device two 7 includes the ultrafiltration component one 701; the ultrafiltration component one 701 is communicated with the water tank three 6 through the booster pump three; the water tank four 702 is communicated with the ultrafiltration component one 701; and the security filter two 703 is communicated with the water tank four 702 through the booster pump four.
[0045] In the embodiment, the water tank three 6 is arranged; the water tank three 6 is the first process of the process; the epichlorohydrin rectifying still wastewater flows into the water tank three 6 to adjust and buffer the water amount; the filtering device two 7 is arranged; the water in the water tank three 6 passes through the ultrafiltration component one 701; the suspended solids, turbidity and colloids in the water body are intercepted through the ultrafiltration component one 701; finally, the water flows into the water tank four 702; then, the water passes through the security filter two 703; the filter element filled in the security filter two 703 is used for filtering treatment; and then, the water enters the next process.
[0046] Further, the membrane concentration device 8 is further included; the membrane concentration device 8 includes the membrane concentration component two 801; the membrane concentration component two 801 is communicated with the security filter two 703 through the high-pressure pump five; the membrane concentration component two 801 has the water outlet five and the water outlet six; the water outlet five is communicated with the water tank two 5; the water tank five 802 is communicated with the water outlet six; and the water tank five 802 is communicated with the security filter one 1 through the high-pressure pump six.
[0047] In the embodiment, the membrane concentration device 8 is arranged; the membrane concentration device 8 is used for first concentrating the epichlorohydrin rectifying still wastewater; the membrane concentration component two 801 is used for concentrating the organic matters (glycerol, glycerol monomethyl ether, etc.) and ions (mainly sodium chloride) in the wastewater by using the reverse osmosis membrane element; the concentrated solution after the organic matters and ions are concentrated at a high multiple flows out from the water outlet five and enters the water tank five 802; the purified fresh water flowing out from the water outlet six is collected to the water tank two 5 through the pipeline; the water in the water tank two 5 can be returned to the pretreatment process and the oil layer washing process in the epichlorohydrin production process to realize recycling; and the water in the water tank five 802 enters the security filter to be filtered and flows into the electrodialysis device 2.
[0048] Further, the filtering device one 3 includes the ultrafiltration component two 301; the ultrafiltration component two 301 is communicated with the water tank one 102 through the booster pump one; the water tank six 302 is communicated with the ultrafiltration component two 301; the security filter three 303 is communicated with the water tank six 302 through the high-pressure pump seven; and the security filter three 303 is communicated with the membrane concentration component one 4 through the high-pressure pump two.
[0049] In the embodiment, the filtering device 3 is arranged to filter the water again, the ultrafiltration member 301 is communicated with the water tank 102, the suspended matter, turbidity and colloid in the incoming water are intercepted through the ultrafiltration member 301, the ultrafiltration member 301 adopts a dead-end filtration mode, and the membrane performance is recovered through regular backwashing, the water produced by the ultrafiltration member 301 is collected in the water tank 302, the water in the water tank 302 flows through the security filter 303, the filter element filled in the security filter 303 is used for filtering treatment, and the treated water flows into the membrane concentration member 4 for membrane concentration.
[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.
Claims
1. An epichlorohydrin rectifier still wastewater resource recycling system, characterized in that, The application relates to an epoxy chloropropane rectification kettle wastewater recovery device, which comprises the following parts: a security filter one (1) for filtering solid impurities in wastewater, an electrodialysis device (2) in communication with the security filter one (1), the electrodialysis device (2) being used for separating organic matters and high-salt water in wastewater, a filtering device one (3) in communication with the electrodialysis device (2) through a booster pump one, a membrane concentration component one (4) in communication with the filtering device one (3) through a high-pressure pump two, the membrane concentration component one (4) being used for separating water and organic matters in wastewater.
2. The system for recycling the waste water of the epoxy chloropropane rectifying kettle according to claim 1, characterized in that, The electrodialysis device (2) comprises: an electrodialysis component (101) in communication with the security filter one (1), the electrodialysis component (101) having a water outlet one and a water outlet two, the water outlet one being used for discharging high-salt water, a water tank one (102) in communication with the water outlet two.
3. The system for recycling the water from the epichlorohydrin distillation kettle according to claim 2, characterized in that, The membrane concentration component one (4) has a water outlet three and a water outlet four, the water outlet three being used for discharging organic matters, and the water outlet four being used for discharging filtered water.
4. The system for recycling the waste water of the epoxy chloropropane rectifying kettle according to claim 3, characterized in that, Further comprising a water tank two (5) in communication with the water outlet four.
5. The system for recycling the water from the epichlorohydrin distillation kettle according to claim 4, characterized in that, Further comprising a water tank three (6) and a filtering device two (7), the water tank three (6) being used for adjusting and buffering the epoxy chloropropane rectification kettle wastewater, the filtering device two (7) comprising: an ultrafiltration component one (701) in communication with the water tank three (6) through a booster pump three, a water tank four (702) in communication with the ultrafiltration component one (701), a security filter two (703) in communication with the water tank four (702) through a booster pump four.
6. The system for recycling the water from the epichlorohydrin distillation kettle according to claim 5, characterized in that, Further comprising a membrane concentration device (8) comprising: a membrane concentration component two (801) in communication with the security filter two (703) through a high-pressure pump five, the membrane concentration component two (801) having a water outlet five and a water outlet six, the water outlet five being in communication with the water tank two (5), a water tank five (802) in communication with the water outlet six, the water tank five (802) being in communication with the security filter one (1) through a high-pressure pump six.
7. The system for recycling the water from the epichlorohydrin distillation kettle according to claim 6, characterized in that, The filtering device one (3) comprises: an ultrafiltration component two (301) in communication with the water tank one (102) through the booster pump one, a water tank six (302) in communication with the ultrafiltration component two (301), a security filter three (303) in communication with the water tank six (302) through a high-pressure pump seven, the security filter three (303) being in communication with the membrane concentration component one (4) through the high-pressure pump two.