Epoxy chloropropane and wastewater separation and recovery equipment

Abstract

The utility model belongs to the technical field of chemical separation and recovery, and particularly relates to epoxy chloropropane and wastewater separation and recovery equipment, which comprises a reduced pressure distillation tank, a wastewater recovery and storage tank, a water ring vacuum pump, a chromatographic box and a phase splitter, a plurality of guide plates inclining downwards are arranged on the inner walls of the two sides of the chromatography box and located above and below the distributor, a plurality of barrier strips are arranged on the lower surfaces of the guide plates, and the bottom end of the right side of the chromatography box is connected with a phase splitter through an inverted U-shaped overflow elbow. According to the utility model, a mixed solution is uniformly dispersed in the chromatography box by utilizing the distributor, an epichlorohydrin aqueous solution is subjected to chromatography into an epichlorohydrin phase and a water phase through the barrier strip on the guide plate, and the top of the inverted U-shaped bent pipe is connected with the chromatography box through the pressure balance pipe, so that the internal pressure balance is kept without supplementing external water; the separation of the epoxy chloropropane and the wastewater is more thorough through multiple times of separation of the chromatography box and the phase splitter; and the separation effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical separation and recovery, and specifically relates to a separation and recovery device for epichlorohydrin and waste water. Background Art

[0002] Chinese patent publication number CN212025230U discloses a highly efficient recovery device for epichlorohydrin in epoxy resin production; it comprises an epichlorohydrin vacuum distillation tank, one side of the top of the epichlorohydrin vacuum distillation tank is connected to a liquid inlet pipe; the top of the vacuum pump water storage tank is connected to a water supply pipe, a water supply solenoid valve is arranged on the water supply pipe, the bottom of the vacuum pump water storage tank is connected to one end of a drain pipe, and the other end of the drain pipe is connected to a liquid inlet of a phase separator; a phase separator is added so that the epichlorohydrin mixed with the circulating water in the water ring vacuum pump can be recovered.

[0003] The above recovery device has the following problems during use:

[0004] 1. The epichlorohydrin mixed liquid enters the vacuum pump water tank. The top of the vacuum pump water tank is connected to the water supply pipe. The water supply solenoid valve is opened to replenish the vacuum pump water tank. External water is added to the vacuum pump water tank and separation is required, which reduces the separation and recovery efficiency.

[0005] 2. The wastewater and epichlorohydrin are separated only once by a phase separator, and the separation is not thorough, resulting in a large loss of crude epichlorohydrin. Summary of the invention

[0006] To solve the problems raised in the above background technology. The utility model provides a separation and recovery device for epichlorohydrin and wastewater, which uses a distributor to evenly disperse the mixed solution in a chromatography box, and the baffle on the guide plate is conducive to the chromatography of the epichlorohydrin aqueous solution into an epichlorohydrin phase and a water phase. The top of the inverted U-shaped elbow is connected to the chromatography box through a pressure balance pipe, and the liquid in the mixed solution flows back to the chromatography box through the pressure balance pipe, and the internal pressure balance is maintained without adding external water; the separation efficiency is improved; the separation of epichlorohydrin and wastewater is more thorough through multiple separations in the chromatography box and the phase separator; the separation effect is improved, and the loss of crude epichlorohydrin is reduced.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a separation and recovery device for epichlorohydrin and wastewater, comprising a vacuum distillation tank, a wastewater recovery storage tank, an epichlorohydrin recovery storage tank, and also comprising a water ring vacuum pump, a chromatography box and a phase separator, wherein the inlet and outlet gas ends of the water ring vacuum pump are connected to the vacuum distillation tank and the epichlorohydrin recovery storage tank through a steam pipe and a first epichlorohydrin recovery pipe respectively, a distributor connected to the water ring vacuum pump is provided in the middle of the chromatography box, a plurality of downwardly inclined guide plates are provided on the inner walls on both sides of the chromatography box at the upper and lower positions of the distributor, a plurality of baffles are provided on the lower surface of the guide plate, the top right side of the chromatography box is connected to the wastewater recovery storage tank through the wastewater recovery pipe, the bottom right side of the chromatography box is connected to the phase separator through an inverted U-shaped overflow elbow, the upper end of the phase separator is connected to the wastewater recovery storage tank through a pipeline, and the bottom end of the phase separator is connected to the epichlorohydrin recovery storage tank through a second epichlorohydrin recovery pipe.

[0008] As a preferred solution, one end of the guide plate is fixedly connected to the inner wall of the chromatography box, and the guide plates of two adjacent layers are inclined downward in opposite directions.

[0009] As a preferred solution, an overflow pipeline connected to the liquid inlet of the water ring vacuum pump is provided above the uppermost guide plate on the left side of the chromatography box, and the liquid outlet of the water ring vacuum pump is connected to the distributor through a liquid infusion pipe.

[0010] As a preferred solution, a control valve is provided on the inverted U-shaped overflow elbow near the chromatography box; the top of the inverted U-shaped overflow elbow is connected to the top of the chromatography box through a pressure balance pipe.

[0011] As a preferred solution, a liquid level sensor is provided on the top of the chromatography box.

[0012] As a preferred solution, a liquid inlet pipe and a pressure gauge are provided on the top of the vacuum distillation tank.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model utilizes a distributor to evenly disperse the mixed solution in the chromatography box, and the baffle on the guide plate is conducive to the chromatography of the epichlorohydrin aqueous solution into an epichlorohydrin phase and an aqueous phase. Wastewater enters a wastewater recovery storage tank from a wastewater recovery pipe at the upper part of the chromatography box, and the epichlorohydrin mixed solution flows out from the bottom of the chromatography box and enters a phase separator through an inverted U-shaped elbow. The top of the inverted U-shaped elbow is connected to the chromatography box through a pressure balance pipe, and the liquid in the mixed solution flows back to the chromatography box through the pressure balance pipe, so that the internal pressure balance is maintained without adding external water, thereby improving the separation efficiency.

[0015] This equipment separates epichlorohydrin and wastewater more thoroughly through multiple separations using a chromatography box and a phase separator; it improves the separation effect and reduces the loss of crude epichlorohydrin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the chromatography box opened in the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 3 For this utility model Figure 1 A schematic diagram of the front view structure of

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the chromatography box of the utility model when it is opened;

[0020] Figure 5 For this utility model Figure 4 Schematic diagram of the front view structure.

[0021] Description of Figure Numbers:

[0022] 1. Vacuum distillation tank;

[0023] 2. Water ring vacuum pump; 21. Steam pipe; 22. First epichlorohydrin recovery pipe; 23. Overflow pipe; 24. Infusion pipe;

[0024] 3. Chromatography box; 31. Liquid level sensor; 32. Distributor; 33. Guide plate; 34. Baffle;

[0025] 4. a phase separator; 41. a second epichlorohydrin recovery pipe;

[0026] 5. Wastewater recovery storage tank; 6. Epichlorohydrin recovery storage tank; 7. Inverted U-shaped overflow elbow; 8. Pressure balance pipe; 9. Wastewater recovery pipe; 11. Liquid inlet pipe; 12. Pressure gauge; 71. Control valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1

[0029] See also Figure 1-5The utility model provides the following technical solutions: a separation and recovery device for epichlorohydrin and wastewater, comprising a vacuum distillation tank 1, a wastewater recovery storage tank 5, an epichlorohydrin recovery storage tank 6, and also comprising a water ring vacuum pump 2, a chromatography box 3 and a phase separator 4, wherein the inlet and outlet ends of the water ring vacuum pump 2 are connected to the vacuum distillation tank 1 and the epichlorohydrin recovery storage tank 6 through a steam pipe 21 and a first epichlorohydrin recovery pipe 22, respectively, a distributor 32 connected to the water ring vacuum pump 2 is provided in the middle of the chromatography box 3, a plurality of downwardly inclined guide plates 33 are provided on the inner walls of both sides of the chromatography box 3 at the upper and lower positions of the distributor 32, a plurality of baffles 34 are provided on the lower surface of the guide plates 33, and the top right side of the chromatography box 3 is connected to the wastewater recovery pipe 9 through the wastewater recovery pipe 9. The bottom right side of the chromatography box 3 is connected to the phase separator 4 through an inverted U-shaped overflow elbow 7, the upper end of the phase separator 4 is connected to the wastewater recovery storage tank 5 through a pipeline, and the bottom end of the phase separator 4 is connected to the epichlorohydrin recovery storage tank 6 through a second epichlorohydrin recovery pipe 41; one end of the guide plate 33 is fixedly connected to the inner wall of the chromatography box 3, and the guide plates 33 of the two adjacent layers are tilted downward in opposite directions; the left side of the chromatography box 3 is provided with an overflow pipeline 23 connected to the liquid inlet end of the water ring vacuum pump 2 above the topmost guide plate 33, and the liquid outlet end of the water ring vacuum pump 2 is connected to the distributor 32 through a liquid infusion pipe 24; in this embodiment, the mixed liquid is input into the chromatography box 3, and firstly, the distributor 32 is evenly dispersed in the chromatography box 3. Due to the different densities of epichlorohydrin and wastewater, epichlorohydrin and wastewater are separated into layers, with the upper layer being wastewater and the lower layer being epichlorohydrin. A baffle 34 is provided on the guide plate 33 in the chromatography box 3. The setting of the baffle 34 increases the friction force, which is conducive to the chromatography of the epichlorohydrin aqueous solution into an epichlorohydrin phase and an aqueous phase. The wastewater enters the wastewater recovery storage tank 5 from the wastewater recovery pipe 9 at the upper part of the chromatography box 3. The epichlorohydrin mixed solution flows out from the bottom of the chromatography box 3 and enters the phase separator 4 through the inverted U-shaped bend 7. The top of the inverted U-shaped bend 7 is connected to the chromatography box 3 through a pressure balance pipe 8. The liquid in the mixed solution flows back to the chromatography box 3 through the pressure balance pipe 8, and the internal pressure balance is maintained without replenishing external water; the separation efficiency is improved; the wastewater is then discharged from the upper part of the phase separator 4 to the wastewater recovery storage tank 5, and the epichlorohydrin is separated and overflowed from the bottom of the phase separator 4 to the epichlorohydrin recovery storage tank 6; the above multiple separations make the separation of epichlorohydrin and wastewater more thorough; the separation effect is improved, and the loss of epichlorohydrin crude product is reduced.

[0030] In this embodiment, a control valve 71 is provided on the inverted U-shaped overflow elbow 7 near the chromatography box 3 ; the top of the inverted U-shaped overflow elbow 7 is connected to the top of the chromatography box 3 through a pressure balance pipe 8 .

[0031] In this embodiment, a liquid level sensor 31 is provided at the top of the chromatography box 3 ; the liquid level height in the chromatography box 3 can be conveniently known through the liquid level sensor 31 .

[0032] In this embodiment, a liquid inlet pipe 11 and a pressure gauge 12 are provided on the top of the vacuum distillation tank 1 .

[0033] Working principle and use process of the utility model: When the utility model is used, the staff distills the epichlorohydrin mixed solution in the vacuum distillation tank 1, and then the water ring vacuum pump 2 works to separate the epichlorohydrin into the epichlorohydrin recovery storage tank 6, and the mixed solution is input into the chromatography box 3, and firstly, the distributor 32 is evenly dispersed in the chromatography box 3. Due to the different densities of epichlorohydrin and wastewater, epichlorohydrin and wastewater are separated into layers, with the upper layer being wastewater and the lower layer being epichlorohydrin. A baffle 34 is provided on the guide plate 33 in the chromatography box 3. The setting of the baffle 34 increases the friction force, which is conducive to the chromatography of the epichlorohydrin aqueous solution into an epichlorohydrin phase and an aqueous phase. The wastewater enters the wastewater recovery storage tank 5 from the wastewater recovery pipe 9 at the upper part of the chromatography box 3. The epichlorohydrin mixed solution flows out from the bottom of the chromatography box 3 and enters the phase separator 4 through the inverted U-shaped bend 7. The top of the inverted U-shaped bend 7 is connected to the chromatography box 3 through a pressure balance pipe 8. The liquid in the mixed solution flows back to the chromatography box 3 through the pressure balance pipe 8, and the internal pressure balance is maintained without replenishing external water; the separation efficiency is improved; the wastewater is then discharged from the upper part of the phase separator 4 to the wastewater recovery storage tank 5, and the epichlorohydrin is separated and overflowed from the bottom of the phase separator 4 to the epichlorohydrin recovery storage tank 6; the above multiple separations make the separation of epichlorohydrin and wastewater more thorough; the separation effect is improved, and the loss of epichlorohydrin crude product is reduced.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A separation and recovery device for epichlorohydrin and wastewater, comprising a vacuum distillation tank (1), a wastewater recovery storage tank (5), and an epichlorohydrin recovery storage tank (6), characterized in that: It also includes a water ring vacuum pump (2), a chromatography box (3) and a phase separator (4); the gas inlet and outlet ends of the water ring vacuum pump (2) are connected to the vacuum distillation tank (1) and the epichlorohydrin recovery storage tank (6) through a steam pipe (21) and a first epichlorohydrin recovery pipe (22), respectively; a distributor (32) connected to the water ring vacuum pump (2) is provided in the middle of the chromatography box (3); and a plurality of downwardly inclined guide plates (32) are provided on the inner walls of both sides of the chromatography box (3) at positions above and below the distributor (32). 33), a plurality of baffles (34) are provided on the lower surface of the guide plate (33), the top end of the right side of the chromatography box (3) is connected to the wastewater recovery storage tank (5) through the wastewater recovery pipe (9), the bottom end of the right side of the chromatography box (3) is connected to the phase separator (4) through an inverted U-shaped overflow elbow (7), the upper end of the phase separator (4) is connected to the wastewater recovery storage tank (5) through a pipeline, and the bottom end of the phase separator (4) is connected to the epichlorohydrin recovery storage tank (6) through a second epichlorohydrin recovery pipe (41).

2. The separation and recovery equipment for epichlorohydrin and waste water according to claim 1, characterized in that: One end of the guide plate (33) is fixedly connected to the inner wall of the chromatography box (3), and the guide plates (33) of two adjacent layers are inclined downward in opposite directions.

3. The separation and recovery equipment for epichlorohydrin and waste water according to claim 1, characterized in that: An overflow pipeline (23) connected to the liquid inlet of the water ring vacuum pump (2) is provided above the uppermost guide plate (33) on the left side of the chromatography box (3), and the liquid outlet of the water ring vacuum pump (2) is connected to the distributor (32) via a liquid infusion pipe (24).

4. The separation and recovery equipment for epichlorohydrin and waste water according to claim 1, characterized in that: A control valve (71) is provided on the inverted U-shaped overflow elbow (7) near the chromatography box (3); the top of the inverted U-shaped overflow elbow (7) is connected to the top of the chromatography box (3) via a pressure balance pipe (8).

5. The separation and recovery equipment for epichlorohydrin and waste water according to claim 1, characterized in that: A liquid level sensor (31) is provided at the top of the chromatography box (3).

6. The separation and recovery equipment for epichlorohydrin and waste water according to claim 1, characterized in that: The top of the vacuum distillation tank (1) is provided with a liquid inlet pipe (11) and a pressure gauge (12).

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