A device for improving the utilization rate of propylene oxide raw material

Abstract

The utility model relates to a device for improving propylene oxide raw material utilization rate. Its technical scheme is: the lower end outlet of calcium hydroxide powder bin is connected with the powder weighing machine, the lower end outlet of powder weighing machine is connected to the input end of screw conveyor, the output end of screw conveyor is located at the top one side of preparation tank, the inner chamber of preparation tank is installed agitator, the top of preparation tank is installed inlet pipe, the bottom of preparation tank is connected with shearing pump through pipeline, the output end of shearing pump is connected with delivery pump through pipeline, the pipeline of output end of delivery pump installs baume degree detector. The beneficial effect is: the utility model can realize stable and reliable matching precision on one hand, on the other hand, the agitator and shearing pump can carry out high speed shearing to the suspended particles in emulsion, so that calcium hydroxide in emulsion cannot form small agglomerates, and in addition, the baume degree detector is additionally installed at the end, can monitor and control the concentration of emulsion at any time, guarantees the quality of lime milk, improves raw material utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of propylene oxide production technology, and in particular to a device for improving the utilization rate of propylene oxide raw materials. Background Technology

[0002] In recent years, with the booming development of new energy vehicles and the energy storage industry, the demand for ethylene carbonate, an indispensable electrolyte solvent for lithium batteries, has also been increasing. Ethylene carbonate can be prepared via transesterification, and propylene oxide is a major raw material for the production of dimethyl carbonate through this process. Propylene oxide is generally prepared by saponification of chloropropanol with lime milk (calcium hydroxide). However, existing calcium hydroxide production equipment is relatively rudimentary, resulting in low raw material utilization, high energy consumption, and high impurity content in the raw materials.

[0003] Therefore, in order to improve the utilization rate of raw materials, a device for improving the utilization rate of propylene oxide raw materials was specially designed. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned deficiencies in the existing technology by providing a device that improves the utilization rate of propylene oxide raw materials. This invention achieves stable and reliable proportioning accuracy on the one hand, and uses a stirrer and a shear pump to perform high-speed shearing of suspended particles in the emulsion, preventing the calcium hydroxide in the emulsion from forming small agglomerates. Furthermore, the addition of a Baume degree detector at the end allows for real-time monitoring and control of the emulsion concentration, ensuring the quality of the lime slurry.

[0005] The present invention mentions a device for improving the utilization rate of propylene oxide raw materials. The technical solution is as follows: it includes a calcium hydroxide powder silo (1), a powder weighing machine (2), a screw conveyor (3), a milking tank (4), a shear pump (6), a conveying pump (7), a Baume degree meter (12), and a water inlet pipe (13). The lower outlet of the calcium hydroxide powder silo (1) is connected to the powder weighing machine (2). The lower outlet of the powder weighing machine (2) is connected to the input end of the screw conveyor (3). The output end of the screw conveyor (3) is located on the top side of the milking tank (4). A stirrer (4.1) is installed in the inner cavity of the milking tank (4). A water inlet pipe (13) is installed on the top of the milking tank (4). The shear pump (6) is connected to the bottom of the milking tank (4) through a pipeline. The output end of the shear pump (6) is connected to one or more conveying pumps (7) through a pipeline. The Baume degree meter (12) is installed on the pipeline at the output end of the conveying pump (7).

[0006] Preferably, a circulation pump (8) is installed on the side of the milk-making tank (4). The inlet of the circulation pump (8) is connected to the lower side wall of the milk-making tank (4), and the outlet of the circulation pump (8) is connected to the upper side wall of the milk-making tank (4) through a pipeline.

[0007] Preferably, the lower end of the above-mentioned water inlet pipe (13) is located at the top of the milking tank (4), and the upper end of the water inlet pipe (13) is equipped with a water inlet valve (5) and a flow meter (9). The outer end of the flow meter (9) is connected to the main water supply pipe (10) through a pipeline.

[0008] Preferably, a level gauge (11) is installed on the top of the milk preparation tank (4) described above.

[0009] Preferably, the Baume degree measuring instrument (12) is installed in parallel on the pipeline at the output end of the transfer pump (7), with the inlet of the Baume degree measuring instrument (12) connected to the pipeline on the side closer to the transfer pump (7) and the outlet of the Baume degree measuring instrument (12) connected to the pipeline on the side farther away from the transfer pump (7).

[0010] Preferably, the outlet end of the pipeline on the side of the outlet end of the delivery pump (7) is connected to the side wall of the milking tank (4) via a return pipeline.

[0011] Preferably, the output end of the shear pump (6) is connected to two sets of delivery pumps (7) via pipelines.

[0012] The beneficial effects of this invention are as follows: This invention achieves stable and reliable proportioning accuracy by precisely injecting water through the inlet valve, flow meter, and main water pipeline, and then injecting a mixture of calcium hydroxide and water into the emulsion tank via a screw conveyor. Furthermore, the use of a stirrer and shear pump allows for high-speed shearing of suspended particles in the emulsion, preventing the formation of small agglomerates of calcium hydroxide and enhancing emulsion quality. Additionally, the addition of a Baume degree detector at the end allows for real-time monitoring and control of the emulsion concentration, ensuring long-term operational stability and eliminating uncontrollable anomalies. This results in a stable output of a calcium hydroxide solution with a high specific surface area. In addition, this utility model improves the equipment for calcium hydroxide emulsification, reduces slag in raw materials, increases the surface area of ​​raw materials, reduces unit consumption, and improves the utilization rate of raw materials. Attached Figure Description

[0013] Figure 1 This is a connection diagram of Embodiment 1 of this utility model; Figure 2 This is a connection diagram of Embodiment 2 of this utility model; In the diagram above: 1. Calcium hydroxide powder silo; 2. Powder weighing machine; 3. Screw conveyor; 4. Milking tank; 5. Inlet valve; 6. Shear pump; 7. Conveying pump; 8. Circulating pump; 9. Flow meter; 10. Main inlet water pipe; 11. Level gauge; 12. Baume meter; 13. Inlet pipe; 14. Return pipeline; 15. Control valve; 16. Agitator 4.1 Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] Example 1, referring to Figure 1 The present invention discloses a device for improving the utilization rate of propylene oxide raw materials, comprising a calcium hydroxide powder silo 1, a powder weighing machine 2, a screw conveyor 3, an emulsifying tank 4, a shear pump 6, a conveying pump 7, a Baume degree meter 12, and a water inlet pipe 13. The lower outlet of the calcium hydroxide powder silo 1 is connected to the powder weighing machine 2, and the lower outlet of the powder weighing machine 2 is connected to the input end of the screw conveyor 3. The output end of the screw conveyor 3 is located on the top side of the emulsifying tank 4. An agitator 4.1 is installed in the inner cavity of the emulsifying tank 4. The water inlet pipe 13 is installed on the top of the emulsifying tank 4. The shear pump 6 is connected to the bottom of the emulsifying tank 4 through a pipeline. The output end of the shear pump 6 is connected to one or more conveying pumps 7 through a pipeline. The Baume degree meter 12 is installed on the pipeline at the output end of the conveying pump 7.

[0016] The aforementioned milk-making tank 4 is equipped with a circulation pump 8 installed on its side. The inlet of the circulation pump 8 is connected to the lower side wall of the milk-making tank 4, and the outlet of the circulation pump 8 is connected to the upper side wall of the milk-making tank 4 through a pipeline.

[0017] The lower end of the aforementioned water inlet pipe 13 is located at the top of the milk preparation tank 4, and the upper end of the water inlet pipe 13 is equipped with a water inlet valve 5 and a flow meter 9. The outer end of the flow meter 9 is connected to the main water supply pipe 10 through a pipeline.

[0018] A level gauge 11 is installed on the top of the aforementioned milk-making tank 4.

[0019] The aforementioned Baume degree measuring instrument 12 is installed in parallel on the pipeline at the output end of the transfer pump 7. The inlet of the Baume degree measuring instrument 12 is connected to the pipeline on the side closer to the transfer pump 7, and the outlet of the Baume degree measuring instrument 12 is connected to the pipeline on the side farther away from the transfer pump 7.

[0020] The output end of the shear pump 6 is connected to two sets of delivery pumps 7 via pipelines.

[0021] The operation method of this utility model is as follows: 1. Start the mixing equipment: Turn on the agitator 4.1 to mix and stir the materials in the milk preparation tank 4 to ensure that the materials are uniform; 2. Start the screw conveyor 3 and check that the equipment is operating well; calcium hydroxide falls from the bottom outlet of the calcium hydroxide powder silo 1 into the powder weighing machine 2, and then into the screw conveyor 3 to be transported to the milking tank 4; 3. Open the inlet valve 5 and the flow meter 9, and connect the outer end of the flow meter 9 to the main water pipe 10 through the pipeline, and control the accuracy of the ratio of water and calcium hydroxide powder to complete the feeding process; 4. In addition, lime slurry is transported to shear pump 6 through the pipeline at the bottom of the emulsion tank 4 for high-speed shearing to obtain 1000-mesh emulsion, which increases the specific surface area by tens of times. The output end of shear pump 6 is connected to one or more transfer pumps 7 through pipeline. The pipeline at the output end of transfer pump 7 is equipped with a Baume degree meter 12. If the Baume degree meter 12 detects that the material is qualified, it continues to be transported out, thereby improving the utilization rate of raw material reaction and reducing unit consumption; if the material is unqualified, shearing continues until the requirements are met.

[0022] This invention improves the raw material's mesh size by increasing it from 100-200 mesh to 325 mesh, and then through precise proportioning of water and calcium hydroxide powder, the emulsion undergoes emulsification and shearing to obtain a 1000 mesh emulsion. This increases the specific surface area by several tens of times, thereby improving the raw material reaction utilization rate and reducing unit consumption.

[0023] Example 2: A device for improving the utilization rate of propylene oxide raw materials mentioned in this utility model includes a calcium hydroxide powder silo 1, a powder weighing machine 2, a screw conveyor 3, an emulsifying tank 4, a shear pump 6, a conveying pump 7, a Baume degree meter 12, and a water inlet pipe 13. The lower outlet of the calcium hydroxide powder silo 1 is connected to the powder weighing machine 2, and the lower outlet of the powder weighing machine 2 is connected to the input end of the screw conveyor 3. The output end of the screw conveyor 3 is located on the top side of the emulsifying tank 4. An agitator 4.1 is installed in the inner cavity of the emulsifying tank 4. The water inlet pipe 13 is installed on the top of the emulsifying tank 4. The shear pump 6 is connected to the bottom of the emulsifying tank 4 through a pipeline. The output end of the shear pump 6 is connected to one or more conveying pumps 7 through a pipeline. The Baume degree meter 12 is installed on the pipeline at the output end of the conveying pump 7.

[0024] The difference from Example 1 is: Reference Figure 2 The outlet end of the pipeline on one side of the outlet of the delivery pump 7 is connected to the side wall of the milking tank 4 through the return pipeline 14 and the control valve 15. After being detected by the Baume degree detector 12, the unqualified material continues to be sent to the milking tank 4 through the return pipeline to continue stirring and shearing until the requirements are met.

[0025] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A device for improving the utilization rate of propylene oxide feedstock, characterized in that: The system includes a calcium hydroxide powder silo (1), a powder weighing machine (2), a screw conveyor (3), a milking tank (4), a shear pump (6), a conveying pump (7), a Baume degree meter (12), and a water inlet pipe (13). The lower outlet of the calcium hydroxide powder silo (1) is connected to the powder weighing machine (2), and the lower outlet of the powder weighing machine (2) is connected to the input end of the screw conveyor (3). The output end of the screw conveyor (3) is located on the top side of the milking tank (4). An agitator (4.1) is installed in the inner cavity of the milking tank (4). The water inlet pipe (13) is installed on the top of the milking tank (4). The shear pump (6) is connected to the bottom of the milking tank (4) through a pipeline. The output end of the shear pump (6) is connected to one or more conveying pumps (7) through a pipeline. The Baume degree meter (12) is installed on the pipeline at the output end of the conveying pump (7).

2. The device for improving the utilization rate of propylene oxide feedstock according to claim 1, characterized in that: A circulation pump (8) is installed on the side of the milk-making tank (4). The inlet of the circulation pump (8) is connected to the lower side wall of the milk-making tank (4), and the outlet of the circulation pump (8) is connected to the upper side wall of the milk-making tank (4) through a pipeline.

3. The device for improving the utilization rate of propylene oxide feedstock according to claim 2, characterized in that: The lower end of the water inlet pipe (13) is located at the top of the milk tank (4), and the upper end of the water inlet pipe (13) is equipped with a water inlet valve (5) and a flow meter (9). The outer end of the flow meter (9) is connected to the main water pipe (10) through a pipeline.

4. The device for improving the utilization rate of propylene oxide feedstock according to claim 3, characterized in that: A level gauge (11) is installed on the top of the milk-making tank (4).

5. The device for improving the utilization rate of propylene oxide feedstock according to claim 4, characterized in that: The Baume degree measuring instrument (12) is installed in parallel on the pipeline at the output end of the delivery pump (7). The inlet of the Baume degree measuring instrument (12) is connected to the pipeline on the side closer to the delivery pump (7), and the outlet of the Baume degree measuring instrument (12) is connected to the pipeline on the side farther away from the delivery pump (7).

6. The device for improving the utilization rate of propylene oxide feedstock according to claim 5, characterized in that: The outlet end of the pipeline on the side of the delivery pump (7) is connected to the side wall of the milking tank (4) via a return pipeline.

7. The device for improving the utilization rate of propylene oxide feedstock according to claim 1, characterized in that: The output end of the shear pump (6) is connected to two sets of delivery pumps (7) via pipelines.

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