Treatment system for wastewater containing adamantane and derivatives thereof

Abstract

The utility model discloses a system for treating wastewater containing adamantane and derivatives thereof, which is characterized in that wastewater is divided into two paths, the first path of wastewater enters from a cold fluid inlet of a kettle liquid cooler, and the second path of wastewater enters from a cold fluid inlet of a distillate cooler; the kettle liquid cooler is sequentially communicated with a preheater, a rectifying tower, a tower top condenser, a tower top condensate tank, a distillate cooler and a filter, a bottom outlet of the rectifying tower is communicated with a cold fluid inlet of a reboiler, and a top steam outlet of the reboiler is communicated with the lower part of the rectifying tower; a tower top condensate tank is communicated with a reflux inlet in the upper part of the rectifying tower through a tower top reflux pump; a filtrate outlet at the bottom of the filter is communicated with a cold fluid inlet of the preheater through a mother liquor reflux pump, and adamantane and derivatives thereof are filtered out from a discharge hole of the filter. The device is simple in structure, adamantane and derivatives thereof in wastewater can be effectively separated and recycled, the treated wastewater can reach the recycling standard, heat energy is effectively utilized, heat consumption of rectification is reduced, and energy is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and particularly relates to a wastewater treatment system for adamantane and its derivatives. Background Art

[0002] Adamantane and adamantane derivatives are very important synthetic organic compounds, mainly used in the synthesis of anti-cancer, anti-tumor and other special drugs, etc., and can also be used to prepare high-grade lubricants, photographic light-sensitive material surfactants, pesticides, catalysts, etc. Since most adamantane derivatives have certain biological toxicity, it is difficult to treat wastewater containing adamantane or adamantane derivatives by traditional biological methods. It is necessary to first reduce the content of adamantane or adamantane derivatives in water to a biologically acceptable range. At the same time, adamantane and its derivatives mostly have good economic efficiency. Therefore, if the adamantane or adamantane derivatives in wastewater can be recovered, it will be more economically valuable. At the same time, the wastewater containing adamantane or adamantane derivatives may also contain other organic or inorganic substances. Therefore, treating or recovering adamantane or adamantane derivatives requires considering its water quality and the front and back treatment processes, and matching appropriate pre-treatment or post-treatment processes. The utility model is mainly used to recover adamantane or adamantane derivatives in wastewater containing adamantane or adamantane derivatives. Content of the Utility Model

[0003] The purpose of the utility model is to provide a wastewater treatment system for adamantane and its derivatives.

[0004] The wastewater treatment system for adamantane and its derivatives provided by the utility model includes: a preheater, a rectification column, a top reflux pump, a top condenser, a top condensate tank, a distillate cooler, a bottom liquid cooler, and a filter. The wastewater containing adamantane and its derivatives is divided into two paths. The first path of wastewater enters from the cold fluid inlet of the bottom liquid cooler, and the second path of wastewater enters from the cold fluid inlet of the distillate cooler; the cold fluid outlet of the bottom liquid cooler is communicated with the cold fluid inlet of the preheater, and the cold fluid outlet of the preheater is communicated with the middle feed port of the rectification column; the top gas phase outlet of the rectification column is communicated with the top hot fluid inlet of the top condenser; the bottom hot fluid outlet of the top condenser is communicated with the top condensate tank, and the top condensate tank is connected to the upper reflux liquid inlet of the rectification column through the top reflux pump; the top condensate tank is communicated with the hot fluid inlet of the distillate cooler, and the hot fluid outlet of the distillate cooler is communicated with the feed port of the filter, and adamantane and its derivatives are filtered out from the discharge port of the filter.

[0005] Furthermore, the wastewater treatment system for adamantane and its derivatives of the utility model further includes: a mother liquor reflux pump, a reboiler; the bottom outlet of the rectification column is communicated with the bottom cold fluid inlet of the reboiler, and the top steam outlet of the reboiler is connected to the lower part of the column kettle of the rectification column. The filtrate outlet at the bottom of the filter is communicated with the cold fluid inlet of the preheater through the mother liquor reflux pump.

[0006] Further, a low-pressure steam inlet is provided at the upper part of the reboiler, and a steam condensate outlet is provided at the lower part of the reboiler; the bottom liquid cooler is a multi-stream heat exchanger with two hot fluid inlets; the rectification column is connected to the bottom of the first hot fluid inlet of the bottom liquid cooler through a bottom liquid extraction pump, and the treated wastewater extracted from the rectification column and cooled is discharged from the first hot fluid outlet of the bottom liquid cooler; the steam condensate outlets of the preheater and the reboiler are both connected to the second hot fluid inlet of the bottom liquid cooler, and the steam condensate is extracted and recovered from the second hot fluid outlet of the bottom liquid cooler.

[0007] Further, the upper cold fluid outlet of the distillate cooler is connected to the lower cold fluid inlet of the top condenser, and the upper cold fluid outlet of the top condenser is connected to the cold fluid inlet of the preheater, and a low-pressure steam inlet is provided on the preheater.

[0008] The beneficial effects of the present utility model are as follows:

[0009] 1. The present utility model utilizes the principle that adamantane and its derivatives can form an azeotrope with water. First, through the rectification column, water vapor and adamantane and its derivatives are distilled out from the top of the rectification column together to concentrate adamantane and its derivatives; then, through condensation by the top condenser and cooling by the distillate cooler, adamantane and its derivatives with low solubility in water will crystallize or precipitate; and then, adamantane and its derivatives are recovered by filtration through a filter. The mother liquor after filtration is re-fed into the rectification column for treatment. The bottom liquid extracted from the rectification column is used to exchange heat with the wastewater feed through the bottom liquid cooler to obtain wastewater without adamantane and its derivatives.

[0010] 2. The present utility model also provides a heat recovery system. The condensate extracted from the top condensate tank is first exchanged heat with the original wastewater in the distillate cooler, so that the condensate is cooled to separate out solid adamantane and its derivatives and then mixed with the original wastewater. The wastewater heated by the condensate is then exchanged heat with the steam at the top in the top condenser, preheated in the preheater, and then fed into the rectification column. The steam at the top is condensed in the top condenser and then enters the top condensate tank, and part of the condensate is controlled according to the reflux ratio to return to the rectification column. If the post-treatment process of the bottom liquid extracted from the rectification column requires cooling, the bottom liquid is exchanged heat with the original wastewater in the bottom liquid cooler and then enters the subsequent treatment section. The original wastewater after exchanging heat with the bottom liquid is mixed with other wastewater and enters the preheater; the steam condensate flowing out of the reboiler has a relatively high temperature and can enter the bottom liquid cooler to exchange heat with the original wastewater to recover heat.

[0011] 3. The structure of the present utility model is simple, which can effectively separate and recover adamantane and its derivatives in wastewater. The content of adamantane and its derivatives in the treated wastewater is far lower than the biological tolerance concentration, and the thermal energy is effectively utilized, reducing the heat consumption of rectification and saving energy. Description of the Drawings

[0012] Figure 1 It is the structural diagram of the wastewater treatment system containing adamantane and its derivatives of the present utility model. Specific embodiments

[0013] The present utility model will be further described in detail below in conjunction with embodiments, but the protection scope of the present utility model is not limited to these embodiments.

[0014] Embodiment 1

[0015] As Figure 1 shown, the wastewater treatment system containing adamantane and its derivatives of this embodiment includes: a preheater 1, a rectifying column 2, a top reflux pump 3, a top condenser 4, a top condensate tank 5, a distillate cooler 6, a bottom liquid cooler 7, a filter 8, a mother liquor reflux pump 9, a bottom liquid extraction pump 10, and a reboiler 11.

[0016] In this embodiment, the wastewater containing adamantane and its derivatives is divided into two paths. The first path of the wastewater stock solution enters through the cold fluid inlet of the bottom liquid cooler 7 through a pipeline, and the second path of the wastewater stock solution enters through the cold fluid inlet of the distillate cooler 6 through a pipeline. The cold fluid outlet of the bottom liquid cooler 7 is connected to the cold fluid inlet of the preheater 1 through a pipeline, the cold fluid outlet of the preheater 1 is connected to the middle feed inlet of the rectifying column 2 through a pipeline, the top gas phase outlet of the rectifying column 2 is connected to the top hot fluid inlet of the overhead condenser 4 through a pipeline, the bottom outlet of the rectifying column 2 is connected to the bottom cold fluid inlet of the reboiler 11 through a pipeline, the top steam outlet of the reboiler 11 is connected to the lower part of the bottom of the rectifying column 2 through a pipeline, a low-pressure steam inlet is arranged at the upper part of the reboiler 11, and a steam condensate outlet is arranged at the lower part of the reboiler 11. The bottom hot fluid outlet of the overhead condenser 4 is connected to the top inlet of the overhead condensate tank 5 through a pipeline, the middle outlet of the overhead condensate tank 5 is connected to the inlet of the overhead reflux pump 3 through a pipeline, and the outlet of the overhead reflux pump 3 is connected to the upper reflux liquid inlet of the rectifying column 2. The bottom outlet of the overhead condensate tank 5 is connected to the hot fluid inlet of the distillate cooler 6 through a pipeline, the hot fluid outlet of the distillate cooler 6 is connected to the feed inlet of the filter 8 through a pipeline, the upper cold fluid outlet of the distillate cooler 6 is connected to the lower cold fluid inlet of the overhead condenser 4 through a pipeline, the upper cold fluid outlet of the overhead condenser 4 is connected to the cold fluid inlet of the preheater 1 through a pipeline, and a low-pressure steam inlet is arranged on the preheater 1. The bottom filtrate outlet of the filter 8 is connected to the inlet of the mother liquor reflux pump 9 through a pipeline, and the outlet of the mother liquor reflux pump 9 is connected to the cold fluid inlet of the preheater 1 through a pipeline. The bottom liquid cooler 7 of this embodiment is a multi-stream heat exchanger with two hot fluid inlets. The rectifying column 2 is connected to the bottom of the first hot fluid inlet of the bottom liquid cooler 7 through the bottom liquid extraction pump 10 through a pipeline, and the steam condensate outlets of the preheater 1 and the reboiler 11 are both connected to the second hot fluid inlet of the bottom liquid cooler 7 through a pipeline. The treated wastewater extracted from the rectifying column 2 and cooled is discharged from the first hot fluid outlet of the bottom liquid cooler 7, the steam condensate is extracted and recovered from the second hot fluid outlet of the bottom liquid cooler 7, and adamantane and its derivatives are filtered out from the discharge port of the filter 8.

[0017] In this embodiment, the wastewater containing adamantane and its derivatives is divided into two paths. The first path of the original wastewater enters the distillation column 2 after being preheated by the preheater 1. The water vapor and adamantane and its derivatives are evaporated from the top of the distillation column 2 together. The concentrated adamantane and its derivatives enter the top condenser liquid tank 5 after being condensed by the top condenser 4. The condensate withdrawn from the top condenser liquid tank 5 exchanges heat and cools with the second path of the original wastewater through the distillate cooler 6. The adamantane and its derivatives with low solubility in water will crystallize or precipitate, and then are filtered by the filter 8 to recover the adamantane and its derivatives which are filtered out from the discharge port of the filter 8. After the condensate is cooled to separate out the solid of adamantane and its derivatives, it is mixed with the first path of the original wastewater and enters the preheater 1 for preheating and then enters the distillation column 2. The second path of the original wastewater after being heated by the condensate exchanges heat with the steam at the top of the top condenser 4 and then enters the preheater 1 for preheating and then enters the distillation column 2. The steam at the top of the top condenser 4 is condensed and enters the top condenser liquid tank 5, and part of the condensate is controlled according to the reflux ratio to return to the distillation column 2. The wastewater treatment system in this embodiment can effectively separate the adamantane and its derivatives in the wastewater. The content of adamantane and its derivatives in the treated wastewater is far lower than the biological tolerance concentration, and the heat energy is effectively utilized, reducing the heat consumption of distillation and saving energy.

Claims

1. A system for treating wastewater containing adamantane and its derivatives, characterized in that: It comprises a preheater (1), a distillation tower (2), a tower top reflux pump (3), a tower top condenser (4), a tower top condensate tank (5), a distillate cooler (6), a kettle liquid cooler (7), and a filter (8); The wastewater containing adamantane and its derivatives is divided into two paths, the first path of wastewater enters from the cold fluid inlet of the kettle liquid cooler (7), and the second path of wastewater enters from the cold fluid inlet of the distillate cooler (6); the cold fluid outlet of the kettle liquid cooler (7) is connected to the cold fluid inlet of the preheater (1), and the cold fluid outlet of the preheater (1) is connected to the middle feed port of the distillation tower (2); the gas phase outlet at the top of the distillation tower (2) is connected to the hot fluid inlet at the top of the tower top condenser (4); the hot fluid outlet at the bottom of the tower top condenser (4) is connected to the tower top condensate tank (5), and the tower top condensate tank (5) is connected to the upper reflux liquid inlet of the distillation tower (2) through the tower top reflux pump (3); the tower top condensate tank (5) is connected to the hot fluid inlet of the distillate cooler (6), and the hot fluid outlet of the distillate cooler (6) is connected to the feed port of the filter (8), and the adamantane and its derivatives are filtered out from the discharge port of the filter (8).

2. The system for treating wastewater containing adamantane and its derivatives according to claim 1, characterized in that: It also includes a mother liquor reflux pump (9) and a reboiler (11); the bottom outlet of the distillation tower (2) is connected to the bottom cold fluid inlet of the reboiler (11), the top steam outlet of the reboiler (11) is connected to the lower part of the distillation tower (2), and the bottom filtrate outlet of the filter (8) is connected to the cold fluid inlet of the preheater (1) via the mother liquor reflux pump (9).

3. The wastewater treatment system containing adamantane and its derivatives according to claim 2, characterized in that: The reboiler (11) is provided with a low-pressure steam inlet at the top and a steam condensate outlet at the bottom; the kettle liquid cooler (7) is a multi-stream heat exchanger having two hot fluid inlets; the distillation tower (2) is connected to the bottom of the first hot fluid inlet of the kettle liquid cooler (7) via a kettle liquid extraction pump (10), and the first hot fluid outlet of the kettle liquid cooler (7) discharges the treated wastewater extracted and cooled from the distillation tower (2); the steam condensate outlet of the preheater (1) and the steam condensate outlet of the reboiler (11) are both connected to the second hot fluid inlet of the kettle liquid cooler (7), and the second hot fluid outlet of the kettle liquid cooler (7) extracts steam condensate and recovers it.

4. The system for treating wastewater containing adamantane and its derivatives according to claim 1, characterized in that: The upper cold fluid outlet of the distillate cooler (6) is connected to the lower cold fluid inlet of the tower top condenser (4), and the upper cold fluid outlet of the tower top condenser (4) is connected to the cold fluid inlet of the preheater (1), and the preheater (1) is provided with a low-pressure steam inlet.

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