Polyether refining system

Abstract

The utility model belongs to the technical field of polyether production, and relates to a polyether refining system, which is arranged in an idle area of an EOD device and comprises a refining kettle connected with a feeding pipeline, a demineralized water pipeline and a charging pipeline, and a stirrer is arranged in the refining kettle; a polyether crude product is added through a feeding pipeline, demineralized water is added through a demineralized water pipeline, and a neutralizer and a refining agent are sequentially added through a charging pipeline; the organic matter separation tank is communicated with the refining kettle through a pipeline and connected with a vacuum pump through a vacuum pump pipeline; the circulating pump is communicated with the refining kettle through a self-circulating pipeline; and the filter is communicated with the refining kettle through a pipeline, is used for filtering the polyether product in the refining kettle and is connected with a clear liquid tank through a clear liquid tank pipeline. The utility model has the advantages that the existing production space can be effectively utilized, the polyether product can be refined and filtered, the product market is widened, the enterprise competitiveness is improved, and the economic benefit is increased.

Description

Technical Field

[0001] This utility model belongs to the field of polyether production technology and relates to a polyether refining system. Background Technology

[0002] The ethylene oxide derivatives (EOD) plant primarily produces macromonomers. However, with the slowdown in the construction industry, competition among macromonomers is fierce, and supply is severely oversupplied, leading to a continuous decline in economic returns, which are below expectations. On the other hand, high-end polyether products have a promising market outlook, large profit margins, and strong market competitiveness.

[0003] Therefore, optimizing existing EOD production lines, enhancing the production capacity of high-end polyether products, and improving corporate efficiency have become issues that need to be addressed. Utility Model Content

[0004] This utility model provides a polyether refining system that can effectively utilize existing production space, achieve refined filtration of polyether products, expand the product market, enhance enterprise competitiveness, and increase economic benefits.

[0005] The technical solution of this utility model includes: a polyether refining system, located in an idle area of ​​an EOD device, comprising: a refining vessel connected to a feed line, a demineralized water line, and a feeding line, wherein a stirrer is installed inside the refining vessel; wherein crude polyether product is added to the refining vessel through the feed line, demineralized water for washing the crude polyether product is added to the refining vessel through the demineralized water line, a neutralizing agent for neutralizing the washed polyether product and a refining agent for refining and adsorbing the neutralized polyether product are successively added to the refining vessel through the feeding line; an organic matter separation tank connected to the refining vessel through a pipeline, the organic matter separation tank being connected to a vacuum pump for evacuating the refining vessel through a vacuum pump pipeline; a circulation pump connected to the refining vessel through a self-circulation pipeline; and a filter connected to the refining vessel through a pipeline, the filter filtering the polyether product in the refining vessel, the filter being connected to a clear liquid tank through a clear liquid tank pipeline.

[0006] Preferably, the refining vessel is equipped with an vent valve and a feed valve, and the refining vessel is connected to a nitrogen pipeline, through which the crude polyether product enters the refining vessel under nitrogen pressure.

[0007] Preferably, after the vent valve is in the open state and the pressure in the refining kettle is released to atmospheric pressure, the crude polyether product enters the refining kettle through the feed valve.

[0008] Preferably, the refining vessel is equipped with a vacuum valve, which is connected to the vacuum pump via a pipeline. The refining vessel is connected to a steam pipeline and a steam condensate pipeline. The steam pipeline is equipped with a steam valve, and the opening degree of the steam valve is adjustable to control the temperature of the refining vessel.

[0009] Preferably, the refining vessel is connected to a sampling pipeline, and the polyether product in the refining vessel is discharged through the sampling pipeline for moisture content detection.

[0010] Preferably, the refining vessel is connected to a circulating water supply line and a circulating water return line.

[0011] Preferably, the refining vessel is equipped with a bottom valve and a top reflux valve, and the bottom valve and the top reflux valve are connected to the self-circulation pipeline.

[0012] Preferably, the filter is a turbid filter, and the turbid filter is equipped with a sampling and detection valve.

[0013] Preferably, the turbid filter is equipped with a nitrogen pressure filtration structure, and the bottom of the turbid filter is equipped with a manual slag discharge hole.

[0014] The beneficial effects of this utility model are as follows: By designing a polyether refining system in the idle area of ​​the EOD device, the existing production space can be effectively utilized, the enterprise's production products can be expanded, and economic benefits can be increased. At the same time, the refining kettle of the polyether refining system is designed with feed pipelines, demineralized water pipelines, feeding pipelines, agitators, and self-circulation pipelines. It is also designed with an organic matter separation tank, a vacuum pump, and a filter connected to the refining kettle. This allows the produced polyether product to undergo water washing, neutralization, refining, and dehydration, and then undergo self-circulation and external filtration to obtain a high-quality refined and filtered polyether product, thereby improving the competitiveness of the enterprise's products. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an embodiment.

[0017] in:

[0018] 1. Refining kettle; 11. Nitrogen pipeline; 12. Demineralized water pipeline; 131. Steam pipeline; 132. Steam condensate pipeline; 141. Circulating return water pipeline; 142. Circulating supply water pipeline; 15. Sampling pipeline; 16. Agitator; 17. Feed pipeline; 18. Feeding pipeline; 19. Tail gas pipeline; 2. Organic matter separation tank; 21. Vacuum pump pipeline; 3. Cooler; 4. Circulating pump; 5. Filter; 51. Clarified liquid tank pipeline. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In this document, terms such as "above," "below," "left," "right," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, these positional relationships may change; therefore, they should not be construed as absolute limitations on the scope of protection. Furthermore, relational terms such as "first" and "second" are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components. In addition, in embodiments of this utility model, "above," "below," etc., include the stated number.

[0021] Reference Figure 1 The polyether refining system of this embodiment is located in the idle area of ​​the EOD device and includes a refining vessel 1, an organic matter separation tank 2, a vacuum pump, a circulation pump 4, a filter 5, and a clear liquid tank.

[0022] The refining vessel 1 is connected to a feed line 17, through which the crude polyether product enters the refining vessel 1. The refining vessel 1 is also connected to a demineralized water line 12 and a feeding line 18. Demineralized water for washing the crude polyether product is added to the refining vessel 1 through the demineralized water line 12, thereby washing the crude polyether product in the refining vessel 1. A neutralizing agent for neutralizing the washed polyether product and a refining agent for refining and adsorbing the neutralized polyether product are added to the refining vessel 1 sequentially through the feeding line 18. Thus, first, the neutralizing agent is added to the refining vessel 1 through the feeding line 18 to neutralize the washed polyether product; then, the refining agent is added to the refining vessel 1 through the feeding line 18 to refine and adsorb the neutralized polyether product. A stirrer 16 is also located inside the refining vessel 1, which stirs and mixes the product in the refining vessel 1 during washing, neutralization, and refining / adsorption.

[0023] Organic matter separation tank 2 is connected to refining vessel 1 via a pipeline. Organic matter separation tank 2 is connected to a vacuum pump for evacuating refining vessel 1 via vacuum pump pipeline 21. In other words, after the polyether product in refining vessel 1 is refined and adsorbed, the refining vessel 1 is evacuated by the vacuum pump, and the polyether product inside is dehydrated.

[0024] The circulating pump 4 is connected to the refining vessel 1 via a self-circulation pipeline, and the filter 5 is also connected to the refining vessel 1 via a pipeline. The filter 5 filters the polyether product within the refining vessel 1. After dehydration, the polyether product is first circulated within the refining vessel 1 by the circulating pump 4 via the self-circulation pipeline, and then filtered by the filter 5. The filter 5 is connected to a clear liquid tank via a clear liquid tank pipeline 51. The filtered polyether product in the refining vessel 1 enters the clear liquid tank through the clear liquid tank pipeline 51, thus unloading the refined, high-quality polyether product into the clear liquid tank for convenient subsequent production management.

[0025] The polyether refining system in this embodiment is designed for unused areas of the EOD (Extractable Oxygen Demand) unit, effectively utilizing existing production space, expanding the company's product range, and increasing economic benefits. Furthermore, after the crude polyether product undergoes the above processes of washing, neutralization, refining adsorption, dehydration, self-circulation, and external filtration, a high-quality refined polyether product can be obtained. This effectively utilizes existing production space while expanding product trial production and enabling the production of high-quality polyether products, thereby enhancing the company's competitiveness and economic benefits.

[0026] In this embodiment, the refining vessel 1 is equipped with an vent valve and a feed valve. The refining vessel 1 is connected to a nitrogen pipeline 11, through which the crude polyether product is pressurized by nitrogen gas. Specifically, the vent valve is in the open state to release the pressure inside the refining vessel 1 to atmospheric pressure, after which the crude polyether product enters the refining vessel 1 through the feed valve. That is, before adding the crude polyether product to the refining vessel 1, the vent valve is used to release the pressure inside the refining vessel 1 to atmospheric pressure, and then the feed valve is used to add the crude polyether product to the refining vessel 1. After feeding is completed, both the vent valve and the feed valve are closed.

[0027] In this embodiment, the refining vessel 1 is equipped with a vacuum valve, which is connected to a vacuum pump via a pipeline. The refining vessel 1 is connected to a steam pipeline 131 and a steam condensate pipeline 132. A steam valve is installed on the steam pipeline 131, and the opening degree of the steam valve is adjustable to control the temperature of the refining vessel 1. Specifically, the refining vessel 1 is connected to a sampling pipeline 15. The polyether product in the refining vessel 1 is discharged through the sampling pipeline 15 for moisture content testing. After washing, neutralization, and refining adsorption, the polyether product is dehydrated. During dehydration, the vacuum valve is first opened to connect the vacuum pump, and the vacuum pump is used to evacuate the refining vessel 1 through the organic matter separation tank 2 and the cooler 3. Then, the steam valve is used to control the refining vessel 1 to maintain the dehydration temperature. After dehydration, the moisture content of the polyether product is sampled and tested using the sampling pipeline 15. If the moisture content meets the requirements, the next step is continued; if the moisture content does not meet the requirements, dehydration continues.

[0028] In this embodiment, the refining vessel 1 is connected to a circulating water supply line 142 and a circulating water return line 141. Specifically, the refining vessel 1 is equipped with a bottom valve and a top reflux valve, which are connected to a self-circulation pipeline equipped with a circulation pump 4. After the polyether product is dehydrated, it continues to undergo self-circulation and external filtration. Before self-circulation, the refining vessel 1 is cooled using water from the circulating water supply line 142 and the circulating water return line 141. Then, the bottom valve and the top reflux valve are opened, and the circulation pump 4 is started for self-circulation. Specifically, the refining vessel 1 is also connected to a tail gas pipeline 19, through which the tail gas generated during the refining and filtration of the polyether product is discharged.

[0029] Specifically, filter 5 is a turbidity filter, which is equipped with a sampling and detection valve. After self-circulation, the polyether product in the refining vessel 1 is discharged into filter 3 via pipeline. When the polyether product passing through the sampling and detection valve meets the index, the polyether product in the refining vessel 1 is discharged into the clear liquid tank via the clear liquid tank pipeline 51.

[0030] Specifically, the turbid filter is equipped with a nitrogen pressure filtration structure, and a manual slag discharge port is located at the bottom of the turbid filter. After the production of this batch of polyether products is completed, the residual material inside the turbid filter is first discharged to the residual liquid tank using the nitrogen pressure filtration structure. Then, the filter residue is discharged externally using the manual slag discharge port at the bottom.

[0031] The production process of high-quality polyether products using the polyether refining system of this embodiment is as follows:

[0032] Feeding: The crude polyether product is fed into the refining vessel 1 through the feed line 17 under the pressure of nitrogen in the nitrogen line 11. When feeding, the vent valve of the refining vessel 1 is opened first. After the pressure is released to atmospheric pressure, the feed valve of the refining vessel 1 is opened. When feeding is finished, the feed valve and the vent valve are closed.

[0033] Washing: According to the process card ratio of polyether product, measure the amount of demineralized water, open the drain valve of the refining kettle 1 to release the pressure to atmospheric pressure, add the measured demineralized water to the refining kettle 1 through the demineralized water pipeline 12, and turn on the agitator 16 to stir for a certain period of time.

[0034] Neutralization: Keep the agitator 16 on, open the vent valve, and add a certain amount of neutralizing agent (according to the process card ratio) through the feeding line 18. After completion, close the vent valve and continue stirring and mixing for a certain period of time.

[0035] Refining Adsorption: Keep the temperature of refining vessel 1 within the range specified in the process card, open the vent valve of refining vessel 1, and add the metered refining agent (according to the process card ratio) into refining vessel 1 through the feeding line 18. After completion, close the vent valve and stirrer 16 continues to stir and mix for a certain period of time.

[0036] Dehydration: Inspect the vacuum pump on-site and add water to a certain level. First, open the vacuum regulating valve to 100%, start the vacuum pump, and open the vacuum valve of refining vessel 1 to perform a vacuuming operation. According to the liquid level change in organic matter separation tank 2, slowly adjust the vacuum degree and gradually reduce the opening of the vacuum reflux regulating valve until it is closed to 0%–10%. During this period, control the temperature of refining vessel 1 within the specified dehydration temperature range by switching the steam valve on and off. After dehydration for a certain period of time, take a sample to test the moisture content. If the moisture content meets the requirements, proceed to the next step; if the moisture content does not meet the requirements, continue dehydration.

[0037] Product circulation filtration: First, adjust the circulation water volume of the circulating water supply line 142 and the circulating water return line 142 to cool the product to the filtration discharge temperature. Then, the refining reactor 1 undergoes self-circulation. Confirm that the valves entering the filter 5 and the bypass valve of the circulating pump 4 are closed. Open the bottom valve of the refining reactor, the inlet and outlet valves of the circulating pump, and the top return valve of the reactor to perform a priming operation. Then, close the pump outlet valve, start the circulating pump 4, and slowly adjust the outlet valve of the pump 4 to the pump's rated pressure, circulating for a certain period of time. Next, open the inlet and outlet valves of the turbid filter and the return valve to the refining reactor, and close the refining reactor return valve to fill the turbid filter with liquid. Observe that the sight glass of filter 5 is full of liquid, circulate for a certain period of time, take samples to test the indicators, and after the indicators are qualified, close the return valve of filter 5 to the top of the reactor, preparing for filtration discharge into the clear liquid tank.

[0038] Filtration and Discharge: Open the drain valve of the clear liquid tank to release the pressure to atmospheric pressure, open valve 51 of the clear liquid tank pipeline, and open the feed valve of the clear liquid tank. When the liquid level in refining vessel 1 drops to a low level, turn off the agitator 16 and circulation pump of refining vessel 1 to avoid damaging the equipment. Use nitrogen to pressurize and discharge the remaining material into the clear liquid tank. When the liquid level in refining vessel 1 is emptied and it is observed on-site that the sight glass is venting, purge the clear liquid tank pipeline 51 and return pipeline multiple times to discharge the remaining material into the clear liquid tank. After completion, close valve 51 of the clear liquid tank pipeline and reset the other valves.

[0039] Filter sludge discharge: First, after the batch is completed, use the nitrogen pressure filtration structure inside filter 5 to press the residual material in filter 5 into the residual liquid tank; then, when the filtration efficiency decreases or the batch is completed and sludge needs to be discharged, confirm that there is no pressure inside filter 5, open the manual sludge discharge hole at the bottom of filter 5, discharge the filter residue and clean it into the filter residue collection container, and then reset the manual sludge discharge hole.

[0040] The polyether refining system of this embodiment can realize the production and refining filtration of high-end polyether products in the EOD device, optimize the product structure, and achieve the goal of mass production of high-quality polyether products.

[0041] Where the embodiments do not contradict each other, at least some of the technical solutions in each embodiment can be recombine to form the essential technical solution of this utility model. Of course, the embodiments can also reference or include each other. Furthermore, it should be noted that adaptive adjustments and modifications made by those skilled in the art when recombinating the technical means described in the embodiments will also fall within the protection scope of this utility model.

[0042] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A polyether purification system characterized by: The idle area of the EOD device is provided with: A refining kettle (1) is connected with a feeding pipeline (17), a desalted water pipeline (12) and a feeding pipeline (18), and a stirrer (16) is arranged in the refining kettle (1); The polyether crude product is added into the refining kettle (1) through the feeding pipeline (17), the desalted water for washing the polyether crude product is added into the refining kettle (1) through the desalted water pipeline (12), the neutralizing agent for neutralizing the polyether product after washing and the refining agent for refining and adsorbing the polyether product after neutralization are added into the refining kettle (1) through the feeding pipeline (18) in sequence; An organic matter separation tank (2) is communicated with the refining kettle (1) through a pipeline, and the organic matter separation tank (2) is connected with a vacuum pump for vacuumizing the refining kettle (1) through a vacuum pump pipeline (21); A circulating pump (4) is communicated with the refining kettle (1) through a self-circulation pipeline; A filter (5) is communicated with the refining kettle (1) through a pipeline, the filter (5) filters the polyether product in the refining kettle (1), and the filter (5) is connected with a clear liquid tank through a clear liquid tank pipeline (51).

2. A polyether purification system according to claim 1, characterized in that: The refining kettle (1) is provided with an emptying valve and a feeding valve, the refining kettle (1) is connected with a nitrogen pipeline (11), and the polyether crude product is pressurized by nitrogen in the nitrogen pipeline (11) and then enters the refining kettle (1).

3. A polyether purification system according to claim 2, wherein: After the pressure in the refining kettle (1) is discharged to normal pressure by opening the emptying valve, the polyether crude product enters the refining kettle (1) through the feeding valve.

4. A polyether purification system according to claim 1, characterized in that: The refining kettle (1) is provided with a vacuum valve, the vacuum valve is connected with the vacuum pump through a pipeline, the refining kettle (1) is connected with a steam pipeline (131) and a steam condensate pipeline (132), the steam pipeline (131) is provided with a steam valve, and the opening degree of the steam valve can be adjusted to control the temperature of the refining kettle (1).

5. A polyether purification system according to claim 4, characterised in that: The refining kettle (1) is connected with a sampling pipeline (15), and the polyether product in the refining kettle (1) is discharged through the sampling pipeline (15) for moisture content detection.

6. A polyether purification system according to claim 1, wherein: The refining kettle (1) is connected with a circulating water feeding pipeline (142) and a circulating water return pipeline (141).

7. A polyether purification system according to claim 6, wherein: The refining kettle (1) is provided with a kettle bottom valve and a kettle top reflux valve, and the kettle bottom valve and the kettle top reflux valve are connected with the self-circulation pipeline.

8. A polyether purification system according to claim 1, wherein: The filter (5) is a turbid filter, and the turbid filter is provided with a sampling detection valve.

9. A polyether purification system according to claim 8, characterised in that: A nitrogen pressure filtration structure is arranged in the turbid filter, and a manual residue discharging hole is arranged at the bottom of the turbid filter.

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