CN209797816U - Trioxymethylene is refine system methylal again - Google Patents
Trioxymethylene is refine system methylal again Download PDFInfo
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- CN209797816U CN209797816U CN201920094482.XU CN201920094482U CN209797816U CN 209797816 U CN209797816 U CN 209797816U CN 201920094482 U CN201920094482 U CN 201920094482U CN 209797816 U CN209797816 U CN 209797816U
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- trioxymethylene
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Abstract
The trioxymethylene reprocessing methylal preparation system comprises a trioxymethylene storage system and a reprocessing system, wherein the trioxymethylene storage system comprises an extracting agent recovery tower, a product tank feeding pump, a product tank feeding heat exchanger and a trioxymethylene storage tank, and the reprocessing system comprises a product tank discharging pump and a methylal preparation reprocessing tank. The bottom discharge port of the extraction agent recovery tower is connected with the product tank feeding heat exchanger through a product tank feeding pump, the product tank feeding heat exchanger is connected with the trioxymethylene storage tank through a pipeline, and the trioxymethylene storage tank is connected with the methylal preparation recycling tank through a product tank discharge pump. The trioxymethylene recycling methylal preparation system can effectively reduce the amount of wastewater generated by a methylal preparation unit and the consumption of formaldehyde, and simultaneously achieves the purpose of no material storage during parking without influencing the quality purity of a subsequently synthesized trioxymethylene product.
Description
Technical Field
The utility model relates to a gather methoxy dimethyl ether production field, concretely relates to trioxymethylene recycles system of making methylal.
Background
The synthesis of the trioxymethylene is a complex chemical reaction process, the reaction equilibrium constant is small, a series of side reactions also exist, a large amount of white floccules are found in the actual production of the trioxymethylene finished product, insoluble substances are generated in the reboiling rectification process and the finished product storage process, the melting point of the substances is higher than that of the trioxymethylene, the polymerization degree of the substances is larger than that of the trioxymethylene, and the substances are unstable in a molten state, so the finished product of the trioxymethylene is used in a short time to avoid various byproducts generated in the storage process, and in addition, the self-polymerization can occur if the finished product is kept still for a long time.
In a polymethoxy dimethyl ether production system, trioxymethylene synthesized by a trioxymethylene synthesis unit is used as a raw material to enter the polymethoxy dimethyl ether synthesis unit for synthesizing the polymethoxy dimethyl ether. Because the trioxymethylene synthesis system can not be stored for a long time, if the subsequent polyoxymethylene dimethyl ether synthesis unit has abnormal conditions, the materials remained in the trioxymethylene synthesis system can not be completely treated, the waste of products is caused, and meanwhile, when the system is restarted, the quality purity of the subsequently synthesized trioxymethylene can also be influenced.
Disclosure of Invention
The utility model discloses to the trioxymethylene problem that above-mentioned prior art exists with not enough, reform transform current trioxymethylene synthesis technology, provide a trioxymethylene smelts back system methylal system.
The utility model discloses a realize through following technical scheme: the trioxymethylene reprocessing methylal preparation system comprises a trioxymethylene storage system and a reprocessing system, wherein the trioxymethylene storage system comprises an extracting agent recovery tower, a product tank feeding pump, a product tank feeding heat exchanger and a trioxymethylene storage tank, and the reprocessing system comprises a product tank discharging pump and a methylal preparation reprocessing tank.
Further, bottom discharge port of the extraction agent recovery tower is connected with product tank feeding heat exchanger through product tank feeding pump, product tank feeding heat exchanger is connected with trioxymethylene storage tank through pipeline, and trioxymethylene storage tank is connected with methylal refining tank through product tank discharge pump.
The utility model has the advantages that: when the production system is in an abnormal condition, part of trioxymethylene in the system is sent to the methylal preparation unit for preparing methylal, so that residual trioxymethylene in the system is ensured, and the waste of trioxymethylene products is avoided. Trioxymethylene replaces formaldehyde to produce methylal, so that the amount of wastewater generated by a methylal preparation unit and the consumption of formaldehyde can be effectively reduced, the aim of no material storage during parking is fulfilled, and the quality purity of a subsequently synthesized trioxymethylene product cannot be influenced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
100-an extractant recovery tower, 101-a product tank feeding pump, 201-a product tank feeding heat exchanger, 301-a trioxymethylene storage tank, 102-a product tank discharging pump and 302-a methylal preparation recycle tank.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
The trioxymethylene reprocessing methylal preparation system comprises a trioxymethylene storage system and a reprocessing system, wherein the trioxymethylene storage system comprises an extracting agent recovery tower 100, a product tank feeding pump 101, a product tank feeding heat exchanger 201 and a trioxymethylene storage tank 301, and the reprocessing system comprises a product tank discharging pump 102 and a methylal preparation reprocessing tank 302.
Further, the bottom discharge hole of the extractant recovery tower 100 is connected with a product tank feeding heat exchanger 201 through a product tank feeding pump 101, the product tank feeding heat exchanger 201 is connected with a trioxymethylene storage tank 301 through a pipeline, and the trioxymethylene storage tank 301 is connected with a methylal preparation recycling tank 302 through a product tank discharge pump 102.
The utility model discloses a work flow as follows: when the system normally operates, trioxymethylene stored in the trioxymethylene storage tank 301 participates in normal synthesis reaction of polymethoxy dimethyl ether at subsequent working sections, when the system stops, the residual trioxymethylene in the system is purified and then sent to the trioxymethylene storage tank 301, and then sent to the refining tank 302 through the product discharge pump 102, and is mixed with methanol according to a certain proportion to prepare methylal.
Claims (2)
1. The utility model provides a trioxymethylene reprocessing system of methylal, includes trioxymethylene storage system, reprocessing system, its characterized in that: the trioxymethylene storage system comprises an extracting agent recovery tower (100), a product tank feeding pump (101), a product tank feeding heat exchanger (201) and a trioxymethylene storage tank (301), and the recycling system comprises a product tank discharging pump (102) and a methylal recycling tank (302).
2. The system for refining methylal by trioxymethylene by recycling as claimed in claim 1, wherein: the extracting agent recovery tower (100) bottom discharge hole is connected with the product tank feeding heat exchanger (201) through the product tank feeding pump (101), the product tank feeding heat exchanger (201) is connected with the trioxymethylene storage tank (301) through a pipeline, and the trioxymethylene storage tank (301) is connected with the methylal preparation recycling tank (302) through the product tank discharging pump (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920094482.XU CN209797816U (en) | 2019-01-21 | 2019-01-21 | Trioxymethylene is refine system methylal again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920094482.XU CN209797816U (en) | 2019-01-21 | 2019-01-21 | Trioxymethylene is refine system methylal again |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209797816U true CN209797816U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920094482.XU Active CN209797816U (en) | 2019-01-21 | 2019-01-21 | Trioxymethylene is refine system methylal again |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209797816U (en) |
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2019
- 2019-01-21 CN CN201920094482.XU patent/CN209797816U/en active Active
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