CN215288031U - Clear mother liquor processing system of crystallization of methyl methacrylate production - Google Patents
Clear mother liquor processing system of crystallization of methyl methacrylate production Download PDFInfo
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- CN215288031U CN215288031U CN202121082751.4U CN202121082751U CN215288031U CN 215288031 U CN215288031 U CN 215288031U CN 202121082751 U CN202121082751 U CN 202121082751U CN 215288031 U CN215288031 U CN 215288031U
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Abstract
The utility model discloses a clear mother liquor treatment system for the production of methyl methacrylate, which comprises a first-stage forced circulation evaporation concentrator, an extraction tower and a centrifuge, the first-stage forced circulation evaporation concentrator can separate the clear crystallization mother liquor into steam, crystallized ammonium sulfate and organic matter mother liquor, the extraction tower is connected with the first-stage forced circulation evaporation concentrator, the organic matter mother liquor generated by the first-stage forced circulation evaporation concentrator can be conveyed into the extraction tower, the extraction tower can extract the entered organic matter mother liquor by using acetone to obtain solid ammonium sulfate and acetone extraction organic liquor, the centrifugal machine is connected with the extraction tower, the acetone extraction organic liquid can be conveyed into the centrifugal machine, the centrifugal machine can separate the acetone extraction organic liquid into acetone and organic resin, and the system can realize recycling treatment of the clear mother liquor of the methyl methacrylate production crystal and recycle of an extraction solvent.
Description
Technical Field
The utility model relates to a methyl methacrylate apparatus for producing technical field, concretely relates to clear mother liquor processing system of crystallization of methyl methacrylate production.
Background
Methyl Methacrylate (MMA) is a monomer of organic glass and is also an important organic chemical raw material. The method can be used for producing organic glass, other resins, adhesives, plastics, coatings, lubricants and the like, and the global production capacity reaches 360 ten thousand tons at present and the domestic production capacity also reaches 20 ten thousand tons.
There are many processes for producing Methyl Methacrylate (MMA), mainly acetone cyanohydrin process (ACH process), isobutylene oxidation process, ethylene process, and the like. The acetone cyanohydrin method is the earliest method for industrially producing MMA, and because the technology is mature and the byproduct hydrocyanic acid is produced by acrylonitrile, the MMA produced by the acetone cyanohydrin method in the world currently accounts for about 80 percent of the total yield.
In the process of producing Methyl Methacrylate (MMA) by adopting an acetone cyanohydrin method, 2.8 tons of waste acid liquor is produced when one ton of products are produced, the main components of the waste acid liquor are 44 percent of ammonium bisulfate, 15 percent of sulfuric acid, 6 percent of sulfonate, a small amount of water-soluble organic matter and 35 percent of water, and the treatment method of the esterification waste liquor mainly adopts an ammonia gas neutralization ammonium sulfate method and an incineration recovery sulfuric acid method.
Because the incineration and sulfuric acid recovery method has high investment and high operation cost, the ammonia gas neutralization ammonium sulfate method is mainly adopted for treatment in China. At present, the domestic methyl methacrylate sulfuric acid waste liquid treatment method mainly adopts continuous ammonium sulfate DTB reaction crystallization treatment, about 1000 tons of ammonium sulfate is produced every day, but clear mother liquid after crystallization is continuously removed from a crystallizer in the ammonium sulfate crystallization separation process, about 2 tons of clear mother liquid are produced every hour, about 40-44 tons of clear mother liquid are produced every day, and the clear mother liquid components of the crystallization are as follows: 42% water, 24% ammonium sulfate, 32.5% acetone sulfonate and other water soluble organics.
The clear crystallized mother liquor has the characteristics of high concentration of sulfur-containing ammonium salt, high ammonia nitrogen content and high COD value, and if the clear crystallized mother liquor is not treated, the clear crystallized mother liquor can cause serious harm to the environment, and the conventional waste liquor treatment method has the disadvantages of high investment, high operation cost, no burden of factories and resource waste.
The existing clear mother liquor treatment scheme of crystallization is that clear mother liquor of crystallization is conveyed into a first-stage forced circulation evaporation concentrator to simultaneously carry out three processes of acidification reaction conversion, evaporation and crystallization, water vapor, crystalline ammonium sulfate and organic mother liquor are separated in the first-stage forced circulation evaporation concentrator, then the organic mother liquor is conveyed into a second-stage forced circulation evaporation concentrator to carry out acidification reaction conversion, evaporation and crystallization again, after water is completely evaporated, the organic mother liquor is pumped out and is extracted by methanol after being cooled, and then the fixed ammonium sulfate and methanol extraction organic liquid fuel is obtained.
The extraction of the organic mother liquor by methanol requires the consumption of a large amount of methanol, which results in higher cost in the treatment process.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a clear mother liquor processing system of crystallization of methyl methacrylate production to realize extraction solvent's cyclic utilization when realizing the clear mother liquor resourceful treatment of crystallization of methyl methacrylate production.
The utility model provides a clear mother liquor processing system of crystallization of methyl methacrylate production, includes one-level forced circulation evaporative concentration ware, extraction tower and centrifuge, the clear mother liquor of one-level forced circulation evaporative concentration ware can separate into vapor, crystallization ammonium sulfate and organic matter mother liquor with the crystallization, and the extraction tower is connected with one-level forced circulation evaporative concentration ware, and the organic matter mother liquor that one-level forced circulation evaporative concentration ware produced can be carried to the extraction tower in, and the extraction tower can utilize acetone to extract the organic matter mother liquor that gets into and obtain solid ammonium sulfate and acetone extraction organic liquid, centrifuge and the extraction tower is connected, and acetone extraction organic liquid can be carried to in the centrifuge, and centrifuge can extract organic liquid separation into acetone and organic matter resin with acetone.
Preferably, the system also comprises a heat exchanger, wherein the heat exchanger is connected with the first-stage forced circulation evaporation concentrator, and water vapor can enter the heat exchanger for heat exchange and temperature reduction to form condensed water.
Preferably, the system further comprises a sewage treatment device, the sewage treatment device is connected with the heat exchanger, and the condensed water formed in the heat exchanger can enter the sewage treatment device.
Preferably, the system also comprises a second-stage forced circulation evaporation concentrator, wherein the second-stage forced circulation evaporation concentrator is connected with the first-stage forced circulation evaporation concentrator, the organic mother liquor generated by the first-stage forced circulation evaporation concentrator can be conveyed into the second-stage forced circulation evaporation concentrator, the second-stage forced circulation evaporation concentrator can separate the input organic mother liquor into second-stage water vapor, second-stage crystallized ammonium sulfate and second-stage organic mother liquor, the second-stage forced circulation evaporation concentrator is connected with the extraction tower, and the second-stage organic mother liquor can be conveyed into the extraction tower.
Preferably, the heat exchanger is connected with both the first-stage forced circulation evaporation concentrator and the second-stage forced circulation evaporation concentrator, and both the water vapor and the second-stage water vapor can enter the heat exchanger for heat exchange and temperature reduction to form condensed water.
Preferably, the system further comprises a sewage treatment device, the sewage treatment device is connected with the heat exchanger, and the condensed water formed in the heat exchanger can enter the sewage treatment device.
The beneficial effects of the utility model are embodied in: according to the technical scheme, the crystallized clear mother liquor is input into the first-stage forced circulation evaporation concentrator to be separated into steam, crystallized ammonium sulfate and organic matter mother liquor, then the organic matter mother liquor is input into the extraction tower and is extracted by acetone to obtain solid ammonium sulfate and acetone extraction organic liquor, then the acetone extraction organic liquor is input into the centrifuge to be separated to obtain acetone and organic matter resin, so that the crystallized clear mother liquor is separated into the steam, the ammonium sulfate and the organic matter resin, resource recycling of the crystallized clear mother liquor is realized, the acetone can be separated after extraction, the acetone can be recycled, consumption of the crystallized clear mother liquor to an extracting agent in a treatment process is reduced, and the treatment cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a system block diagram of the present invention.
In the attached figure, 1-a first-stage forced circulation evaporation concentrator, 2-a second-stage forced circulation evaporation concentrator, 3-an extraction tower, 4-a centrifugal machine, 5-a heat exchanger and 6-sewage treatment equipment.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
Example 1
As shown in fig. 1, the present embodiment provides a clear mother liquor treatment system for methyl methacrylate production crystallization, including a first-stage forced circulation evaporation concentrator 1, an extraction tower 3 and a centrifuge 4, where the first-stage forced circulation evaporation concentrator 1 can separate the clear mother liquor from crystallization into steam, ammonium sulfate crystallization and organic mother liquor, the extraction tower 3 is connected to the first-stage forced circulation evaporation concentrator 1, the organic mother liquor generated by the first-stage forced circulation evaporation concentrator 1 can be conveyed into the extraction tower 3, the extraction tower 3 can extract the entered organic mother liquor with acetone to obtain solid ammonium sulfate and acetone-extracted organic liquor, the centrifuge 4 is connected to the extraction tower 3, the acetone-extracted organic liquor can be conveyed into the centrifuge 4, and the centrifuge 4 can separate the acetone-extracted organic liquor into acetone and organic resin.
Clear mother liquor of crystallization is input to first-order forced circulation evaporation concentrator 1 and is separated into vapor, crystallization ammonium sulfate and organic matter mother liquor in this embodiment, then input organic matter mother liquor and utilize acetone to extract in extraction tower 3 and obtain solid ammonium sulfate and acetone extraction organic liquid, then input acetone extraction organic liquid and separate in centrifuge 4 and obtain acetone and organic matter resin, clear mother liquor of crystallization is separated into vapor, ammonium sulfate and organic matter resin so, realize the resourceization recycle of clear mother liquor of crystallization, acetone can separate again after the extraction simultaneously, acetone can cyclic utilization, the consumption of clear mother liquor of crystallization to the extractant in the processing procedure has been reduced, and the treatment cost is saved.
Example 2
The embodiment is further limited on the basis of the embodiment 1, and the embodiment further comprises a heat exchanger 5, wherein the heat exchanger 5 is connected with the first-stage forced circulation evaporation concentrator 1, and the water vapor can enter the heat exchanger 5 to exchange heat and reduce the temperature to be condensed water. The device further comprises a sewage treatment device 6, the sewage treatment device 6 is connected with the heat exchanger 5, and condensed water formed in the heat exchanger 5 can enter the sewage treatment device 6.
In this embodiment, the water vapor generated by the first-stage forced circulation evaporative concentrator 1 is discharged into the heat exchanger 5 for heat exchange to form condensed water, so as to reduce the temperature of the discharged water, and then the condensed water is discharged into the sewage treatment equipment 6 for treatment and then discharged, so that the discharged water reaches the discharge standard, and the pollution to the environment is reduced.
Example 3
The embodiment is further limited on the basis of the embodiment 1, and the embodiment further includes a second-stage forced circulation evaporation concentrator 2, the second-stage forced circulation evaporation concentrator 2 is connected with the first-stage forced circulation evaporation concentrator 1, the organic mother liquor generated by the first-stage forced circulation evaporation concentrator 1 can be conveyed into the second-stage forced circulation evaporation concentrator 2, the second-stage forced circulation evaporation concentrator 2 can separate the input organic mother liquor into second-stage water vapor, second-stage crystallized ammonium sulfate and second-stage organic mother liquor, the second-stage forced circulation evaporation concentrator 2 is connected with the extraction tower 3, and the second-stage organic mother liquor can be conveyed into the extraction tower 3.
In this embodiment, the second forced circulation evaporation concentrator 2 is provided to reprocess the organic mother liquor discharged from the first forced circulation evaporation concentrator 1 to form second-level water vapor, second-level crystallized ammonium sulfate and second-level organic mother liquor, where the second-level and the first-level have no practical meaning and are only used for distinguishing, so that after the organic mother liquor formed by the first-level forced circulation evaporation concentrator 1 is reprocessed, second-level organic mother liquor is formed, the content of the organic mother liquor is reduced, the second-level organic mother liquor is discharged into the extraction tower 3 to be extracted, the burden of the extraction tower 3 is reduced, the amount of acetone is reduced, and the extraction effect is better.
The heat exchanger 5 is connected with the first-stage forced circulation evaporation concentrator 1 and the second-stage forced circulation evaporation concentrator 2, and both the water vapor and the second-stage water vapor can enter the heat exchanger 5 to exchange heat and cool into condensed water.
The device further comprises a sewage treatment device 6, the sewage treatment device 6 is connected with the heat exchanger 5, and condensed water formed in the heat exchanger 5 can enter the sewage treatment device 6.
In this embodiment, the water vapor generated in the first-stage forced circulation evaporative concentrator 1 and the second-stage forced circulation evaporative concentrator 2 is discharged into the heat exchanger 5 for heat exchange to form condensed water, so that the temperature of the discharged water is reduced, and then the condensed water is discharged after being discharged into the sewage treatment equipment 6 for treatment, so that the discharged water reaches the discharge standard, and the pollution to the environment is reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (6)
1. A crystallization clear mother liquor treatment system for methyl methacrylate production is characterized by comprising a first-stage forced circulation evaporation concentrator (1), an extraction tower (3) and a centrifuge (4), the primary forced circulation evaporation concentrator (1) can separate the clear crystallized mother liquor into vapor, crystallized ammonium sulfate and organic matter mother liquor, the extraction tower (3) is connected with the primary forced circulation evaporation concentrator (1), the organic matter mother liquor generated by the primary forced circulation evaporation concentrator (1) can be conveyed into the extraction tower (3), the extraction tower (3) can extract the entered organic matter mother liquor by using acetone to obtain solid ammonium sulfate and acetone extraction organic liquor, the centrifugal machine (4) is connected with the extraction tower (3), the acetone extraction organic liquid can be conveyed into the centrifugal machine (4), and the centrifugal machine (4) can separate the acetone extraction organic liquid into acetone and organic resin.
2. The system for treating the clear mother liquor from the crystallization of the production of methyl methacrylate as claimed in claim 1, further comprising a heat exchanger (5), wherein the heat exchanger (5) is connected with the first-stage forced circulation evaporation concentrator (1), and the water vapor can enter the heat exchanger (5) for heat exchange and temperature reduction to form condensed water.
3. A crystallized clear mother liquor treatment system for methyl methacrylate production according to claim 2, characterized in that the system further comprises a sewage treatment device (6), wherein the sewage treatment device (6) is connected with the heat exchanger (5), and condensed water formed in the heat exchanger (5) can enter the sewage treatment device (6).
4. The system for treating clear mother liquor from methyl methacrylate production as claimed in claim 1, further comprising a second stage forced circulation evaporation concentrator (2), wherein the second stage forced circulation evaporation concentrator (2) is connected to the first stage forced circulation evaporation concentrator (1), the organic mother liquor generated by the first stage forced circulation evaporation concentrator (1) can be transported to the second stage forced circulation evaporation concentrator (2), the second stage forced circulation evaporation concentrator (2) can separate the input organic mother liquor into second stage water vapor, second stage ammonium sulfate crystal and second stage organic mother liquor, the second stage forced circulation evaporation concentrator (2) is connected to the extraction tower (3), and the second stage organic mother liquor can be transported to the extraction tower (3).
5. The system for treating clear mother liquor from methyl methacrylate production according to claim 4, further comprising a heat exchanger (5), wherein the heat exchanger (5) is connected with both the first-stage forced circulation evaporative concentrator (1) and the second-stage forced circulation evaporative concentrator (2), and both the water vapor and the second-stage water vapor can enter the heat exchanger (5) for heat exchange and temperature reduction to form condensed water.
6. A crystallized clear mother liquor treatment system for methyl methacrylate production according to claim 5, characterized in that the system further comprises a sewage treatment device (6), wherein the sewage treatment device (6) is connected with the heat exchanger (5), and condensed water formed in the heat exchanger (5) can enter the sewage treatment device (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121082751.4U CN215288031U (en) | 2021-05-19 | 2021-05-19 | Clear mother liquor processing system of crystallization of methyl methacrylate production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121082751.4U CN215288031U (en) | 2021-05-19 | 2021-05-19 | Clear mother liquor processing system of crystallization of methyl methacrylate production |
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| CN215288031U true CN215288031U (en) | 2021-12-24 |
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| CN202121082751.4U Active CN215288031U (en) | 2021-05-19 | 2021-05-19 | Clear mother liquor processing system of crystallization of methyl methacrylate production |
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