Treatment device for wastewater in chloroacetone production process

Abstract

The utility model discloses a wastewater treatment device in a chloroacetone production process, which belongs to the technical field of chloroacetone production processes and comprises an extraction tower component and a rectifying tower component. According to the utility model, the chloroacetone in the wastewater is recovered through extraction and rectification technologies, and the design that the distribution coefficient of the chloroacetone in an extraction agent is large is utilized, so that the recovery efficiency of the chloroacetone is effectively improved, the chloroacetone in the wastewater can be efficiently recovered, the product loss is reduced, the smooth discharge of water is ensured, and the device is reasonable in design, simple and convenient to operate and low in cost. The cost is low, the environment-friendly effect is good, the conditions of resource waste and environment pollution are avoided, and wide industrial application prospects are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chloroacetone production process technical field, specifically for a kind of wastewater treatment device in chloroacetone production process. BACKGROUND

[0002] Chloroacetone, also known as monochloropropanone and chlorinated acetone, is an important organic compound. Chloroacetone has a certain solubility in water. According to production data, the solubility of chloroacetone in water is about 8-12% (with certain fluctuations with temperature). Therefore, chloroacetone is often dissolved in the wastewater generated during the production of chloroacetone. How to recover chloroacetone from wastewater, reduce product loss and ensure smooth discharge of water is an important work content. Traditional treatment methods cannot effectively recover chloroacetone from wastewater, which can easily lead to waste of resources and pollution of the environment.

[0003] Therefore, it is necessary to invent a wastewater treatment device for chloroacetone production process to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving the problem that traditional treatment methods cannot effectively recover chloroacetone from wastewater, which can easily lead to waste of resources and pollution of the environment, and provides a wastewater treatment device for chloroacetone production process.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: including extraction tower assembly and rectifying column assembly, the rectifying column assembly is connected to the outer side of the extraction tower assembly through pipeline, characterized in that: the rectifying column assembly includes rectifying column main body, condenser, intermediate tank, reflux pipeline, extractant receiving tank, second connecting pipe and product receiving tank, the condenser is connected with the top of the rectifying column main body through pipeline, the intermediate tank is connected below the condenser through pipeline, the reflux pipeline is arranged between the bottom of the intermediate pipeline and the rectifying column main body, the extractant receiving tank is connected below the intermediate tank through pipeline and connected with the bottom of the extractant receiving tank through pipeline, one end of the second connecting pipe is fixedly connected to the bottom of the rectifying column main body, and the product receiving tank is fixedly connected to the other end of the second connecting pipe.

[0006] As a further description of the above technical scheme, the extraction tower assembly includes extraction tower main body, extractant feed port, water phase feed port and oil-water separator, the extractant feed port is arranged outside the top of the extraction tower main body, the water phase feed port is arranged outside the bottom of the extraction tower main body, and the oil-water separator is fixedly arranged on the upper and lower ends of the extraction tower main body.

[0007] As a further description of the above technical scheme, the extraction tower assembly further comprises an upper clarifying chamber, a water phase discharge port, a stirring motor and a stirring paddle, the upper clarifying chamber is arranged above the upper oil-water separator, the water phase discharge port is arranged outside the top of the upper clarifying chamber, the stirring motor is fixedly connected above the upper clarifying chamber and the output end of the stirring motor extends into the inside of the upper clarifying chamber, and the stirring paddle is fixedly connected below the output end of the stirring motor and extends into the inside of the extraction tower main body through the upper oil-water separator;

[0008] As a further description of the above technical scheme, the extraction tower assembly further comprises a lower clarifying chamber and an extraction phase discharge port, the lower clarifying chamber is arranged at the bottom of the lower oil-water separator, and the extraction phase discharge port is arranged at the bottom of the lower clarifying chamber.

[0009] As a further description of the above technical scheme, the rectifying tower assembly further comprises a first connecting pipe, an extraction heavy phase buffer tank and a first regulating valve, the top of the extraction heavy phase buffer tank is connected with the extraction phase discharge port through a pipeline, one end of the first connecting pipe is fixedly connected with the bottom of the extraction heavy phase buffer tank, the other end is fixedly connected with the middle part of the rectifying tower main body, and the first regulating valve is arranged on the first connecting pipe.

[0010] As a further description of the above technical scheme, the rectifying tower assembly further comprises a second regulating valve, the second regulating valve is arranged on the second connecting pipe and located between the rectifying tower main body and the product receiving tank.

[0011] As a further description of the above technical scheme, the rectifying tower main body is internally provided with two tower kettle circulating pumps, one of the tower kettle circulating pumps is used for circulating tower kettle materials, and the other tower kettle circulating pump is used as a product production pump.

[0012] Compared with the prior art, the device has the advantages that:

[0013] The device recovers chloroacetone in wastewater by extraction and rectification technology, effectively improves the recovery efficiency of chloroacetone by using the design that the distribution coefficient of chloroacetone in the extractant is large, can efficiently recover chloroacetone in wastewater, reduces product loss while ensuring smooth water discharge, has reasonable device design, simple operation, low cost, good environmental protection effect, avoids the situation of resource waste and environmental pollution, and has wide industrial application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure front view of a wastewater treatment device in a chloroacetone production process according to one embodiment of the present disclosure.

[0015] Figure 2 It is a whole structure schematic view of a wastewater treatment device in a chloroacetone production process according to one embodiment of the present disclosure.

[0016] Figure 3 is a structure diagram of an extraction column assembly of a wastewater treatment device in a chloroacetone production process according to an embodiment of the present disclosure.

[0017] Figure 4 is a structure diagram of a rectifying column assembly of a wastewater treatment device in a chloroacetone production process according to an embodiment of the present disclosure.

[0018] The specific reference signs in the drawings are as follows:

[0019] 1, extraction column assembly; 11, extraction column body; 12, extractant feed port; 13, water phase feed port; 14, oil-water separator; 15, upper clarifying chamber; 16, water phase discharge port; 17, stirring motor; 18, stirring paddle; 19, lower clarifying chamber; 110, extraction phase discharge port;

[0020] 2, rectifying column assembly; 21, rectifying column body; 22, first connecting pipe; 23, extraction heavy phase buffer tank; 24, first regulating valve; 25, condenser; 26, intermediate tank; 27, reflux line; 28, extractant receiving tank; 29, second connecting pipe; 210, product receiving tank; 211, second regulating valve. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings, and the drawings show several embodiments of the present application, but the present application can be realized in different forms and is not limited to the embodiments described in the text, on the contrary, these embodiments are provided to make the disclosed content of the present application more thorough and comprehensive.

[0022] As shown in Figure 1 — Figure 4 A wastewater treatment device in a chloroacetone production process, comprising an extraction column assembly 1 and a rectifying column assembly 2, the rectifying column assembly 2 is connected to the outside of the extraction column assembly 1 through a pipeline.

[0023] As shown in Figures 2-3As shown in this disclosure, the extraction tower assembly 1 includes an extraction tower body 11, an extractant inlet 12, an aqueous phase inlet 13, an oil-water separator 14, an upper clarification chamber 15, an aqueous phase outlet 16, a stirring motor 17, a stirring paddle 18, a lower clarification chamber 19, and an extractant outlet 110. The extractant inlet 12 is located on the outer top of the extraction tower body 11, the aqueous phase inlet 13 is located on the outer bottom of the extraction tower body 11, and the oil-water separator 14 is fixedly installed at both the upper and lower ends of the extraction tower body 11. The upper clarification chamber 15 is located above the upper oil-water separator 14. The aqueous phase outlet 16 is located on the outer side of the top of the upper clarification chamber 15. The stirring motor 17 is fixedly connected above the upper clarification chamber 15 and its output end extends into the interior of the upper clarification chamber 15. The stirring paddle 18 is fixedly connected below the output end of the stirring motor 17 and one end passes through the upper oil-water separator 14 and extends into the interior of the extraction tower body 11. The lower clarification chamber 19 is located at the bottom of the lower oil-water separator 14, and the extraction phase outlet 110 is located at the bottom of the lower clarification chamber 19.

[0024] Therefore, during use, the extractant enters the extraction tower through the extractant inlet 12, and the aqueous phase containing chloroacetone enters the extraction tower through the aqueous phase inlet 13. Then, the two phases are extracted by countercurrent contact within the equipment. The aqueous phase moves upward within the extraction tower, passes through the oil-water separator 14 to the upper clarification chamber 15, and is discharged from the aqueous phase outlet 16 after clarification. The extractant moves downward within the extraction tower, passes through the oil-water separator 14 to the lower clarification chamber 19, and is discharged from the extract phase outlet 110 after clarification.

[0025] like Figure 2 and Figure 4 As shown, in a preferred embodiment, the distillation column assembly 2 includes a distillation column body 21, a first connecting pipe 22, an extraction heavy phase buffer tank 23, a first regulating valve 24, a condenser 25, an intermediate tank 26, a reflux line 27, an extractant receiving tank 28, a second connecting pipe 29, a product receiving tank 210, and a second regulating valve 211. The top of the extraction heavy phase buffer tank 23 is connected to the extractant outlet 110 via a pipe. One end of the first connecting pipe 22 is fixedly connected to the bottom of the extraction heavy phase buffer tank 23, and the other end is fixedly connected to the middle part of the distillation column body 21. The first regulating valve 24 is located on the first connecting pipe. On 22, the condenser 25 is connected to the top of the distillation column body 21 via a pipe, the intermediate tank 26 is connected to the bottom of the condenser 25 via a pipe, the reflux line 27 is located between the bottom of the intermediate pipe and the distillation column body 21, the extractant receiving tank 28 is connected to the bottom of the intermediate tank 26 via a pipe and is connected to the extractant inlet 12 via a pipe, one end of the second connecting pipe 29 is fixedly connected to the bottom of the distillation column body 21, the product receiving tank 210 is fixedly connected to the other end of the second connecting pipe 29, and the second regulating valve 211 is located on the second connecting pipe 29 and between the distillation column body 21 and the product receiving tank 210.

[0026] Thus, the main components of the extraction phase are the extractant and chloroacetone, which are discharged through the extraction phase outlet 110 into the extraction heavy phase buffer tank 23, and then enter the rectification tower main body 21 from the middle part of the rectification tower main body 21 through the first connecting pipe 22 to be separated, the extractant collected from the top of the rectification tower main body 21 after rectification and separation is condensed by the condenser 25 and then enters the intermediate tank 26, part of the material in the intermediate tank 26 is returned to the rectification tower main body 21 through the reflux pipeline 27 to ensure the quality of the product, and the other part is collected from the extractant receiving tank 28 and then returned to the extractant feeding port 12 through the pipeline, and then enters the extraction process again, the chloroacetone in the tower kettle is collected to the product receiving tank 210, and the tower kettle pump is a two-tower kettle circulating pump, one is used to circulate the material in the tower kettle and the other is used as a product collection pump, and the heating medium in the rectification tower main body 21 is steam.

[0027] The utility model has been described above in conjunction with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as the method concept and technical scheme of the utility model are adopted for such non-essential improvement or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, which are all within the protection scope of the utility model.

Claims

1. A device for treating waste water in a chloroacetone production process, comprising an extraction column assembly (1) and a rectification column assembly (2), the rectification column assembly (2) being connected to the outside of the extraction column assembly (1) by means of a pipe, characterized in that: The rectification tower assembly (2) comprises a rectification tower body (21), a condenser (25), an intermediate tank (26), a reflux pipeline (27), an extractant receiving tank (28), a second connecting pipe (29) and a product receiving tank (210), the condenser (25) is connected with the top of the rectification tower body (21) through a pipeline, the intermediate tank (26) is connected below the condenser (25) through a pipeline, the reflux pipeline (27) is arranged between the bottom of the intermediate pipeline and the rectification tower body (21), the extractant receiving tank (28) is connected below the intermediate tank (26) through a pipeline, one end of the second connecting pipe (29) is fixedly connected to the bottom of the rectification tower body (21), and the product receiving tank (210) is fixedly connected to the other end of the second connecting pipe (29).

2. A device for treating wastewater in a chloroacetone production process according to claim 1, characterized in that: The extraction tower assembly (1) comprises an extraction tower body (11), an extractant feeding port (12), a water phase feeding port (13) and an oil-water separator (14), the extractant feeding port (12) is arranged outside the top of the extraction tower body (11) and connected with the bottom of the extractant receiving tank (28) through a pipeline, the water phase feeding port (13) is arranged outside the bottom of the extraction tower body (11), and the oil-water separator (14) is fixedly arranged on the upper and lower ends of the extraction tower body (11).

3. A device for treating wastewater in a chloroacetone production process according to claim 2, characterized in that: The extraction tower assembly (1) further comprises an upper clarification chamber (15), a water phase discharge port (16), a stirring motor (17) and a stirring paddle (18), the upper clarification chamber (15) is arranged above the upper oil-water separator (14), the water phase discharge port (16) is arranged outside the top of the upper clarification chamber (15), the stirring motor (17) is fixedly connected above the upper clarification chamber (15) and the output end of the stirring motor (17) extends into the inside of the upper clarification chamber (15), and the stirring paddle (18) is fixedly connected below the output end of the stirring motor (17) and one end of the stirring paddle (18) extends into the inside of the extraction tower body (11) through the upper oil-water separator (14).

4. A device for treating wastewater in a chloroacetone production process according to claim 3, characterized in that: The extraction tower assembly (1) further comprises a lower clarification chamber (19) and an extract phase discharge port (110), the lower clarification chamber (19) is arranged at the bottom of the lower oil-water separator (14), and the extract phase discharge port (110) is arranged at the bottom of the lower clarification chamber (19).

5. A device for treating wastewater in a chloroacetone production process according to claim 4, characterized in that: The rectification tower assembly (2) further comprises a first connecting pipe (22), an extraction heavy phase buffer tank (23) and a first regulating valve (24), the top of the extraction heavy phase buffer tank (23) is connected with the extract phase discharge port (110) through a pipeline, one end of the first connecting pipe (22) is fixedly connected with the bottom of the extraction heavy phase buffer tank (23) and the other end is fixedly connected to the middle part of the rectification tower body (21), and the first regulating valve (24) is arranged on the first connecting pipe (22).

6. A device for treating wastewater in a chloroacetone production process according to claim 5, characterized in that: The rectification tower assembly (2) further comprises a second regulating valve (211), the second regulating valve (211) is arranged on the second connecting pipe (29) and located between the rectification tower body (21) and the product receiving tank (210).

7. A device for treating wastewater in a chloroacetone production process according to claim 6, characterized in that: The rectifying tower main body (21) is internally provided with two tower kettle circulating pumps, one of which is used for circulating tower kettle materials, and the other is used as a product extraction pump.

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