Peculiar smell removing device for epoxypropane saponification residual liquid

Abstract

The utility model relates to a peculiar smell removing device for epoxypropane saponification residual liquid. According to the technical scheme, a lime milk storage tank and a chloropropanol storage tank are connected to a saponification tower through pipelines respectively, and the bottom of the saponification tower is connected with a saponification waste liquid tank; the lower end of the diffusion tower is connected to a water treatment system through a pipeline, the upper end of the diffusion tower is connected to a separation tank through a pipeline and a second condenser, and the lower side of the separation tank is connected with a dichloro isopropyl ether storage tank through a pipeline and a dichloro isopropyl ether delivery pump. The device has the beneficial effects that low-pressure steam fed from the bottom of the diffusion tower is evacuated under the action of the vacuum pump, a gas phase at the top of the diffusion tower enters the second condenser and is condensed under the cooling action of circulating water to enter the separation tank, and the dichloroisopropyl ether sinks to the bottom and is treated by the dichloroisopropyl ether delivery pump, so that the quality of the dichloroisopropyl ether is improved. Dichloro isopropyl ether is extracted, cooled, collected, separated and treated, so that peculiar smell is removed, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to a saponification system of a propylene oxide device, in particular to a device for removing odor from saponified residual liquid of propylene oxide. Background Art

[0002] In recent years, with the booming development of the new energy vehicle and energy storage industries, demand for ethylene carbonate, an indispensable electrolyte solvent for automotive lithium batteries, has also been growing. Ethylene carbonate can be produced through the transesterification process, where propylene oxide is the primary raw material for producing dimethyl carbonate. Propylene oxide is typically produced through the saponification reaction of chloropropanol with lime milk. However, existing saponification towers utilize a traditional structure, resulting in low propylene oxide yields. Furthermore, the saponification residue has an odor, which has been identified as the primary component being dichloroisopropyl ether. Therefore, based on its compositional characteristics, research is needed to extract and collect this component to reduce its content and remove the odor. Utility Model Content

[0003] The purpose of the utility model is to address the above-mentioned defects of the prior art and provide a device for removing odor from propylene oxide saponification residual liquid. By adding a diffusion tower, low-pressure steam is introduced into the bottom of the tower to extract dichloroisopropyl ether, which is collected after cooling and then treated after separation, thereby removing the odor.

[0004] The utility model discloses a propylene oxide saponification residual liquid deodorizing device, and its technical solution is as follows: comprising a lime milk storage tank (V101), a chloropropanol storage tank (V102), a saponification tower (T201), a first condenser (F201), a propylene oxide crude product tank (V201), a saponification waste liquid tank (V202), a diffusion tower (T301), a second condenser (F301), a separation tank (T401), a dichloroisopropyl ether storage tank (V401), and a water treatment system (C301), wherein the lime milk storage tank (V101) and the chloropropanol storage tank (V102) are respectively connected to the upper side of the saponification tower (T201) through pipelines, and the upper part of the saponification tower (T201) is connected to the upper side of the saponification tower (T201) through pipelines and the first condenser (F201). ) is connected to a crude propylene oxide tank (V201), the bottom of the saponification tower (T201) is connected to a saponification waste liquid tank (V202) via a pipeline; the lower end of the saponification waste liquid tank (V202) is connected to a diffusion tower (T301) via a pipeline and a saponification liquid delivery pump (3), a side line of the diffusion tower (T301) is fed with low-pressure steam (L1), the lower end of the diffusion tower (T301) is connected to a water treatment system (C301) via a pipeline, the upper end of the diffusion tower (T301) is connected to a separation tank (T401) via a pipeline and a second condenser (F301), and the lower side of the separation tank (T401) is connected to a dichloroisopropyl ether storage tank (V401) via a pipeline and a dichloroisopropyl ether delivery pump (5).

[0005] Preferably, the upper side of the separation tank (T401) is connected to the water treatment system (C301) or the circulating water storage tank or the chloropropanol storage tank (V102) through a pipeline and a clean water pump (6).

[0006] Preferably, the tube-side inlet and the tube-side outlet of the second condenser (F301) are connected to circulating water, the shell-side inlet of the second condenser (F301) is connected to the upper end of the diffusion tower (T301) through a pipeline, the shell-side outlet of the second condenser (F301) is connected to the separation tank (T401) through a pipeline, and the shell-side of the second condenser (F301) is connected to the vacuum pump (P401) through a pipeline.

[0007] Preferably, the upper part of the saponification tower (T201) is connected to the tube-side inlet of the first condenser (F201) through a pipeline, the shell-side outlet of the first condenser (F201) is connected to the crude propylene oxide tank (V201) through a pipeline, and the tube-side inlet and tube-side outlet of the first condenser (F201) are connected to circulating water.

[0008] Preferably, the bottom of the saponification tower (T201) is connected to the saponification waste liquid tank (V202) via a pipeline and a control valve (7).

[0009] Preferably, the lime milk storage tank (V101) is connected to the upper side of the saponification tower (T201) via a pipeline and a lime milk feed pump (1).

[0010] Preferably, the chloropropanol storage tank (V102) is connected to the upper side of the saponification tower (T201) via a pipeline and a chloropropanol feed pump (2).

[0011] The beneficial effects of the utility model are as follows: the utility model sends the saponification waste liquid to the inner cavity of the diffusion tower, and then, the low-pressure steam sent into the bottom of the diffusion tower is evacuated under the action of a vacuum pump, and the gas phase at the top of the diffusion tower enters the second condenser, and is condensed into the separation tank under the action of circulating water cooling, and the dichloroisopropyl ether sinks to the bottom and is processed by a dichloroisopropyl ether delivery pump, and the dichloroisopropyl ether is extracted, cooled, collected, separated, and processed. On the one hand, the separated dichloroisopropyl ether can be used as an organic solvent for processing, which can generate certain economic benefits, and on the other hand, the odor of the saponification residual liquid can be effectively removed, thereby improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0013] Figure 2 This is a schematic structural diagram of Example 2 of the present utility model;

[0014] In the figure above: lime milk storage tank V101, chloropropanol storage tank V102, saponification tower T201, first condenser F201, propylene oxide crude product tank V201, saponification waste liquid tank V202, diffusion tower T301, second condenser F301, vacuum pump P401, separation tank T401, dichloroisopropyl ether storage tank V401, water treatment system C301,

[0015] Lime milk feed pump 1, chloropropanol feed pump 2, saponified liquid feed pump 3, diffusion tower bottom pump 4, dichloroisopropyl ether feed pump 5, clean water pump 6, control valve 7. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0017] Example 1, with reference to Figure 1 The utility model mentions a propylene oxide saponification residual liquid deodorizing device, comprising a lime milk storage tank V101, a chloropropanol storage tank V102, a saponification tower T201, a first condenser F201, a propylene oxide crude product tank V201, a saponification waste liquid tank V202, a diffusion tower T301, a second condenser F301, a separation tank T401, a dichloroisopropyl ether storage tank V401, and a water treatment system C301. The lime milk storage tank V101 and the chloropropanol storage tank V102 are respectively connected to the upper side of the saponification tower T201 through pipelines, and the upper part of the saponification tower T201 is connected to the first condenser F201 through a pipeline. To the crude propylene oxide tank V201, the bottom of the saponification tower T201 is connected to the saponification waste liquid tank V202 through a pipeline; the lower end of the saponification waste liquid tank V202 is connected to the diffusion tower T301 through a pipeline and a saponification liquid delivery pump 3, and the side line of the diffusion tower T301 is introduced into the low-pressure steam L1. The lower end of the diffusion tower T301 is connected to the water treatment system C301 through a pipeline, and the upper end of the diffusion tower T301 is connected to the separation tank T401 through a pipeline and the second condenser F301. The lower side of the separation tank T401 is connected to the dichloroisopropyl ether storage tank V401 through a pipeline and a dichloroisopropyl ether delivery pump 5.

[0018] The upper side of the separation tank T401 is connected to the water treatment system C301 or the circulating water storage tank or the chloropropanol storage tank V102 through a pipeline and a clean water pump 6 .

[0019] The tube side inlet and tube side outlet of the above-mentioned second condenser F301 are connected to circulating water, the shell side inlet of the second condenser F301 is connected to the upper end of the diffusion tower T301 through a pipeline, the shell side outlet of the second condenser F301 is connected to the separation tank T401 through a pipeline, and the shell side of the second condenser F301 is connected to the vacuum pump P401 through a pipeline.

[0020] The upper part of the saponification tower T201 is connected to the tube side inlet of the first condenser F201 through a pipeline, the shell side outlet of the first condenser F201 is connected to the crude propylene oxide tank V201 through a pipeline, and the tube side inlet and tube side outlet of the first condenser F201 are connected to circulating water.

[0021] The bottom of the saponification tower T201 is connected to the saponification waste liquid tank V202 through a pipeline and a control valve 7.

[0022] The above-mentioned lime milk storage tank V101 is connected to the upper side of the saponification tower T201 through a pipeline and a lime milk feeding pump 1.

[0023] The above-mentioned chloropropanol storage tank V102 is connected to the upper side of the saponification tower T201 through a pipeline and a chloropropanol feed pump 2.

[0024] When the utility model is used, lime milk is connected to the saponification tower T201 through the lime milk feeding pump 1, chloropropanol is fed into the saponification tower T201 through the chloropropanol feeding pump 2 for reaction, the generated crude propylene oxide is sent to the first condenser F201 through the top of the saponification tower T201 for condensation, and then sent to the crude propylene oxide tank V201 for storage; after a period of reaction, the control valve 7 on the pipeline at the bottom of the saponification tower T201 is opened to send the saponification waste liquid to the saponification waste liquid tank V202, and then to the inner cavity of the diffusion tower T301 through the saponification liquid feeding pump 3, and then the low-pressure steam fed into the bottom of the diffusion tower T301, Under the action of the vacuum pump P401, the air is evacuated to make the pressure in the diffusion tower T301 negative. The gas phase at the top of the diffusion tower T301 enters the second condenser F301 under the action of the vacuum pump P401, and is condensed into the separation tank T401 under the action of circulating water cooling. The dichloroisopropyl ether sinks to the bottom and is processed by the dichloroisopropyl ether delivery pump 5. The supernatant is mainly water, which enters the water treatment system C301 through the clean water pump 6 for treatment and then recycled. On the one hand, the separated dichloroisopropyl ether can be used as an organic solvent for treatment, which can generate certain economic benefits. On the other hand, it can effectively remove the odor of the saponification residue.

[0025] Example 2, the utility model mentioned a propylene oxide saponification residual liquid deodorizing device, including a lime milk storage tank V101, a chloropropanol storage tank V102, a saponification tower T201, a first condenser F201, a propylene oxide crude product tank V201, a saponification waste liquid tank V202, a diffusion tower T301, a second condenser F301, a separation tank T401, a dichloroisopropyl ether storage tank V401, and a water treatment system C301, wherein the lime milk storage tank V101 and the chloropropanol storage tank V102 are respectively connected to the upper side of the saponification tower T201 through pipelines, and the upper part of the saponification tower T201 is connected to the first condenser F201 through pipelines. The bottom of the saponification tower T201 is connected to the saponification waste liquid tank V202 through a pipeline; the lower end of the saponification waste liquid tank V202 is connected to the diffusion tower T301 through a pipeline and a saponification liquid delivery pump 3, and the side line of the diffusion tower T301 is introduced into the low-pressure steam L1. The lower end of the diffusion tower T301 is connected to the water treatment system C301 through a pipeline, and the upper end of the diffusion tower T301 is connected to the separation tank T401 through a pipeline and a second condenser F301. The lower side of the separation tank T401 is connected to the dichloroisopropyl ether storage tank V401 through a pipeline and a dichloroisopropyl ether delivery pump 5.

[0026] The difference from Example 1 is:

[0027] Reference Figure 2 The upper side of the separation tank T401 mentioned in this embodiment is connected to the chloropropanol storage tank V102 through a pipeline and a clean water pump 6, and can continue to be used for the reaction cycle.

[0028] Example 3, the utility model mentioned a propylene oxide saponification residual liquid deodorizing device, comprising a lime milk storage tank V101, a chloropropanol storage tank V102, a saponification tower T201, a first condenser F201, a propylene oxide crude product tank V201, a saponification waste liquid tank V202, a diffusion tower T301, a second condenser F301, a separation tank T401, a dichloroisopropyl ether storage tank V401, and a water treatment system C301, wherein the lime milk storage tank V101 and the chloropropanol storage tank V102 are respectively connected to the upper side of the saponification tower T201 through pipelines, and the upper part of the saponification tower T201 is connected to the first condenser F201 through pipelines. The bottom of the saponification tower T201 is connected to the saponification waste liquid tank V202 through a pipeline; the lower end of the saponification waste liquid tank V202 is connected to the diffusion tower T301 through a pipeline and a saponification liquid delivery pump 3, and the side line of the diffusion tower T301 is introduced into the low-pressure steam L1. The lower end of the diffusion tower T301 is connected to the water treatment system C301 through a pipeline, and the upper end of the diffusion tower T301 is connected to the separation tank T401 through a pipeline and a second condenser F301. The lower side of the separation tank T401 is connected to the dichloroisopropyl ether storage tank V401 through a pipeline and a dichloroisopropyl ether delivery pump 5.

[0029] The difference from Example 1 is:

[0030] The upper side of the separation tank T401 mentioned in this embodiment is connected to the circulating water storage tank for standby use through a pipeline and a clean water pump 6.

[0031] The above description is merely a preferred embodiment of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or create equivalent technical solutions. Therefore, any simple modifications or equivalent transformations based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A device for removing odor from propylene oxide saponification residual liquid, characterized by: The invention comprises a lime milk storage tank (V101), a chloropropanol storage tank (V102), a saponification tower (T201), a first condenser (F201), a crude propylene oxide tank (V201), a saponification waste liquid tank (V202), a diffusion tower (T301), a second condenser (F301), a separation tank (T401), a dichloroisopropyl ether storage tank (V401), and a water treatment system (C301). The lime milk storage tank (V101) and the chloropropanol storage tank (V102) are respectively connected to the upper side of the saponification tower (T201) through pipelines, and the upper part of the saponification tower (T201) is connected to the crude propylene oxide tank (V201) through pipelines and the first condenser (F201). ), the bottom of the saponification tower (T201) is connected to the saponification waste liquid tank (V202) through a pipeline; the lower end of the saponification waste liquid tank (V202) is connected to the diffusion tower (T301) through a pipeline and a saponification liquid delivery pump (3), the side line of the diffusion tower (T301) is introduced into the low-pressure steam (L1), the lower end of the diffusion tower (T301) is connected to the water treatment system (C301) through a pipeline, the upper end of the diffusion tower (T301) is connected to the separation tank (T401) through a pipeline and a second condenser (F301), and the lower side of the separation tank (T401) is connected to the dichloroisopropyl ether storage tank (V401) through a pipeline and a dichloroisopropyl ether delivery pump (5).

2. The propylene oxide saponification residual liquid deodorizing device according to claim 1, characterized in that: The upper side of the separation tank (T401) is connected to the water treatment system (C301) or the circulating water storage tank or the chloropropanol storage tank (V102) through a pipeline and a clean water pump (6).

3. The propylene oxide saponification residual liquid deodorizing device according to claim 2, characterized in that: The tube-side inlet and tube-side outlet of the second condenser (F301) are connected to circulating water, the shell-side inlet of the second condenser (F301) is connected to the upper end of the diffusion tower (T301) through a pipeline, the shell-side outlet of the second condenser (F301) is connected to the separation tank (T401) through a pipeline, and the shell-side of the second condenser (F301) is connected to the vacuum pump (P401) through a pipeline.

4. The propylene oxide saponification residual liquid deodorizing device according to claim 3, characterized in that: The upper part of the saponification tower (T201) is connected to the tube-side inlet of the first condenser (F201) through a pipeline, the shell-side outlet of the first condenser (F201) is connected to the crude propylene oxide tank (V201) through a pipeline, and the tube-side inlet and tube-side outlet of the first condenser (F201) are connected to circulating water.

5. The propylene oxide saponification residual liquid deodorizing device according to claim 4, characterized in that: The bottom of the saponification tower (T201) is connected to the saponification waste liquid tank (V202) through a pipeline and a control valve (7).

6. The propylene oxide saponification residual liquid deodorizing device according to claim 1, characterized in that: The lime milk storage tank (V101) is connected to the upper side of the saponification tower (T201) through a pipeline and a lime milk feeding pump (1).

7. The propylene oxide saponification residual liquid deodorizing device according to claim 1, characterized in that: The chloropropanol storage tank (V102) is connected to the upper side of the saponification tower (T201) through a pipeline and a chloropropanol feed pump (2).

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