CN113461520B - Acid water mechanism for MMA production device - Google Patents
Acid water mechanism for MMA production device Download PDFInfo
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- CN113461520B CN113461520B CN202010239539.8A CN202010239539A CN113461520B CN 113461520 B CN113461520 B CN 113461520B CN 202010239539 A CN202010239539 A CN 202010239539A CN 113461520 B CN113461520 B CN 113461520B
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- acid water
- tank
- acid
- tanks
- water tank
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/533—Monocarboxylic acid esters having only one carbon-to-carbon double bond
- C07C69/54—Acrylic acid esters; Methacrylic acid esters
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention relates to an acid water mechanism for an MMA production device, comprising: the acid water tank (1), with acid water tank (1) cooperation arrangement is used for to the sour water supply line (2) of a plurality of acid water tanks (1), and a plurality of intercommunication acid water tank (1) are used for transporting from the discharge house steward (3) of the ejection of compact in acid water tank (1), and connect discharge house steward (3) are used for with waste acid discharge pump (4) in the discharge house steward (3). The arrangement of equipment, pipelines and the like in the acid water mechanism can realize that all tanks in the acid water mechanism can be mutually switched and standby when the device is operated, so that the tank cleaning period and the time of the acid water tank are obviously reduced, the whole acid water system can be operated stably, and the normal operation of the device is ensured.
Description
Technical Field
The invention relates to an acid water mechanism for an MMA production device.
Background
Methyl Methacrylate (MMA) is an important organic chemical raw material and chemical product, can be polymerized or copolymerized with other monomers to generate methyl methacrylate resin and plastics, such as organic glass (PMMA), methyl methacrylate-styrene-butadiene (MBS) resin and the like, and can be used for second monomers, resins, adhesives, coatings, medical functional materials and the like for acrylic fiber production, and the application is very wide.
At present, the technology for producing methyl methacrylate adopted at home and abroad mainly comprises an Acetone Cyanohydrin (ACH) method, an isobutene oxidizing method and an ethylene method, the technology of the ACH method is mainly adopted in North America and Western European countries, the technology of preparing methyl methacrylate by mainly adopting isobutene as a raw material is mainly adopted in Japan, and industrialization is mainly realized in the production technology of methyl methacrylate by adopting ethylene as a raw material, namely a Basoff technology and an Alpha technology of British cellulite (Lucite) company.
The Acetone Cyanohydrin (ACH) method is continuously improved and improved for a long time, has advanced technology, mature and reliable technology and good product quality, is a main production method of MMA, and has the capacity ratio of more than 80% in the global scope. The process can effectively utilize the byproduct hydrocyanic acid of the acrylonitrile device, and the yield of MMA is higher, which is an important technical advantage.
In the Acetone Cyanohydrin (ACH) method, methyl Methacrylate (MMA) products are sent to a rectification separation device from an esterification kettle gas phase, kettle liquid (waste acid water) is sent to an acid water tank, and after light components are recovered through steam stripping, the residual waste acid is sent to a waste acid recovery device. In the esterification process, heavy components (asphaltene) are usually generated in the kettle liquid of the esterification kettle, and enter the acid water storage tank along a pipeline along with acid water, and fall to the bottom of the storage tank to form an asphaltene precipitation layer through continuous accumulation, so that the acid water tank needs to be manually cleaned by opening the tank periodically, the asphaltene is in a black semisolid colloid state from the appearance, and the asphaltene becomes a substance with a slightly hard surface similar to coal cinder after being contacted with air in the tank cleaning process.
The acid water tank is generally of a carbon steel lining acid-proof brick structure, and is easy to damage in the tank cleaning process compared with a steel storage tank, and because the amount of asphaltene is large, the acid water tank needs to be cleaned once in about fifteen days to twenty days, and the tank cleaning frequency is relatively high, so that the normal production of the device is not affected, and how to set a set of acid water system capable of effectively switching and mutually preparing is very important.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide an acid water mechanism for an MMA production apparatus.
To achieve the above object, the present invention provides an acid water mechanism for an MMA production apparatus, comprising: the acid water tanks are matched with an acid water supply pipeline for supplying acid water to the acid water tanks, a plurality of discharge main pipes which are communicated with the acid water tanks and used for conveying discharge from the acid water tanks, and a conveying pump which is connected with the discharge main pipes and used for discharging waste acid in the discharge main pipes.
According to one aspect of the invention, the pipeline of the acid water supply pipeline connected with the acid water tank, the pipeline of the acid water tank connected with the discharging main pipe and the pipeline of the discharging main pipe connected with the conveying pump are all provided with switching valves for switching on and off the pipeline.
According to one aspect of the invention, the acid water tank is composed of a carbon steel body, a layer of acid-resistant brick body is additionally paved at the bottom of the tank inside the carbon steel body, and the acid-resistant brick body is obliquely paved to form a slope.
According to one aspect of the invention, a manhole with a diameter of 900-1300 mm is arranged on the side wall of the lower part of the acid water tank, and the lower edge of the manhole is adjacent to the upper side of the slope.
According to one aspect of the invention, the lower side wall of the sour water tank is further provided with a tank discharge port and a drain outlet which is arranged adjacent to the tank discharge port and is used for removing liquid phase dirt in the tank, and the tank discharge port and the drain outlet are adjacent to the lower side of the slope.
According to one aspect of the invention, the tank outlet and the drain are disposed on a side opposite the manhole.
According to one aspect of the invention, the system comprises two acid water tanks and one acid water supply pipeline, wherein the acid water supply pipeline is communicated with one acid water tank to convey acid water, and the other acid water tank is used for cleaning the tank.
According to one aspect of the invention, the system comprises three acid tanks and one acid water supply pipeline, wherein the acid water supply pipeline is communicated with one acid water tank to convey acid water, one of the other two acid water tanks is used for cleaning, and the other one is used as a standby acid water tank.
According to one aspect of the invention, the system comprises three acid tanks and two acid water supply pipelines, wherein the two acid water supply pipelines are communicated with one of the acid water tanks to convey acid water, and the other two acid water tanks are used as standby acid water tanks of the two acid water supply pipelines and correspond to the two acid water supply pipelines one by one.
According to one aspect of the invention, the volume of the acid water tank is the total volume of the acid water supplied by the two acid water supply lines.
According to the scheme of the invention, when the device is operated, the tanks in the acid water mechanism can be mutually switched for standby, the tank cleaning period and the time of the acid water tank are obviously reduced, the whole acid water system can be operated stably, and the normal operation of the device is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 schematically shows a block diagram of an acid water mechanism for an MMA production apparatus according to an embodiment of the invention;
fig. 2 schematically shows a front view of a sour water tank according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
In describing embodiments of the present invention, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in terms of orientation or positional relationship shown in the drawings for convenience of description and simplicity of description only, and do not denote or imply that the devices or elements in question must have a particular orientation, be constructed and operated in a particular orientation, so that the above terms are not to be construed as limiting the invention.
The present invention will be described in detail below with reference to the drawings and the specific embodiments, which are not described in detail herein, but the embodiments of the present invention are not limited to the following embodiments.
Fig. 1 schematically shows a structural view of an acid water mechanism for an MMA production apparatus according to one embodiment of the present invention. As shown in fig. 1, the acid water mechanism for an MMA production apparatus according to the present invention includes a plurality of acid water tanks 1, an acid water supply line 2, a discharge header pipe 3, and a transfer pump 4. In the present embodiment, the acid water supply line 2 is disposed in cooperation with the acid water tank 1, the number of which depends on the number of the acid water tanks 1, and the acid water supply line 2 communicates with the acid water tank 1 through a line to supply acid water to the acid water tank 1. The discharging header pipe 3 is disposed below the plurality of acid tanks 1, is communicated with the acid tanks 1 through a pipe, and is used for discharging the waste acid discharged from the acid tanks 1, and in this embodiment, the discharging header pipe 3 conveys the waste acid to the conveying pump 4 through a pipe, and then the conveying pump 4 discharges the waste acid to the waste acid recovery device.
In this embodiment, on each pipeline that acid water supply pipeline 2 links to each other with acid water tank 1, each pipeline that acid water tank 1 links to each other with discharge header pipe 3 and the pipeline that discharge header pipe 3 links to each other with delivery pump 4 all are provided with the independent ooff valve 5 that is used for the break-make pipeline, can control each pipeline alone like this, control the feeding and discharging of each acid water tank, realize carrying out the processing of specific work according to the operating mode, make the mechanism of the invention more nimble changeable, adapt to different production environment.
Fig. 2 schematically shows a front view of a sour water tank according to an embodiment of the invention. As shown in fig. 2, in the present embodiment, the acid tank 1 is formed of a carbon steel body 101, an acid-proof brick body 102 is laid inside the tank, and the acid-proof brick body 102 is laid obliquely to form a slope, which is gradually raised from the left side to the right side in fig. 2 as seen from the joint in the figure. In the present embodiment, a manhole 103 having a diameter of 900 to 1300mm is provided on the lower side wall of the carbon steel body 101 of the acid tank 1, and as is clear from the figure, the manhole 103 is provided on the bottom of the side wall of the carbon steel body 101, immediately on the side where the slope surface rises, that is, on the side higher than the other side of the slope surface. Further, in the present embodiment, the tank discharge port 104 and the drain port 105 for discharging liquid-phase dirt in the tank, which are provided adjacent to the tank discharge port 104, are further provided on the lower side wall of the carbon steel body 101 of the acid tank 1, and as can be seen from the figure, the tank discharge port 104 and the drain port 105 are located immediately on the side where the slope is lowered, i.e., on the lower side than the above-mentioned raised side. A tank discharge port 104 and a drain port 105 are provided on the side opposite to the manhole 103. In the present embodiment, the height H2 of the drain 105 from the bottom of the carbon steel body of the hot-metal bottle 1 should be as small as possible. In the invention, the manhole 103 is arranged to facilitate operators to enter the acid water tank to carry out slag removal, investigation and maintenance and other works on the acid water tank, and the drain outlet 105 can discharge liquid phase dirt in other dirt tanks except acid water when the acid water tank 1 is subjected to tank cleaning treatment. In addition, in the embodiment, the manhole 103 is arranged at the lower part of the tank body, the lower edge of the manhole 103 is as flat as possible with the bottom of the carbon steel body, and an acid-proof brick is used for making a slope at the bottom of the tank, so that the design can ensure that a worker can directly push out asphaltene from the manhole when cleaning the tank, the tank cleaning efficiency is improved, the tank cleaning time is shortened, and the acid water tank can be put into use as soon as possible.
In the present invention, as described above, the acid water tank 1 may be provided in plural, and one or more acid water supply lines 2 may be provided in cooperation with the acid water tank 1. According to one embodiment of the present invention, as shown in fig. 1, three acid water tanks 1 and two acid water supply pipelines 2 are provided, both of the two acid water supply pipelines 2 communicate with one of the acid water tanks 1 to convey acid water, and the other two acid water tanks 1 serve as spare acid water tanks of the two acid water supply pipelines 2 and communicate with the two acid water supply pipelines 2 in one-to-one correspondence.
According to another embodiment of the invention, two acid tanks 1 and an acid water supply pipeline 2 are arranged, the acid water supply pipeline 2 is communicated with one of the acid tanks 1 to convey acid water, the other acid tank 1 is subjected to tank cleaning treatment, and the tank cleaning treatment can be used as a standby acid tank or directly used as an operation tank.
According to a third embodiment of the present invention, three acid tanks 1 and one acid water supply line 2 are provided, the acid water supply line 2 communicates with one of the acid tanks 1 to convey acid water, one of the other two acid tanks 1 is cleaned, and the other is used as a spare acid water tank.
According to the arrangement, after the device runs for a period of time, the effect is effectively verified, three acid tanks can be well switched and standby in the production process, the tank cleaning time interval is obviously prolonged, the tank cleaning operation time and times are greatly reduced, the stable running of the whole acid water system is effectively ensured, and the device can run more safely.
Therefore, the arrangement of equipment, pipelines and the like in the acid water mechanism can realize that all tanks in the acid water mechanism can be mutually switched and standby when the device is operated, so that the tank cleaning period and the tank cleaning time of the acid water tank are obviously shortened, the whole acid water system can be operated stably, and the normal operation of the device is ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (2)
1. An acid water mechanism for an MMA production apparatus, comprising: a plurality of acid tanks (1), an acid water supply pipeline (2) which is matched with the acid water tanks (1) and is used for supplying acid water to the acid water tanks (1), a discharging main pipe (3) which is communicated with the acid water tanks (1) and is used for transporting and discharging the acid water from the acid water tanks (1), and a conveying pump (4) which is connected with the discharging main pipe (3) and is used for discharging waste acid in the discharging main pipe (3);
the device comprises three acid water tanks (1) and two acid water supply pipelines (2), wherein the two acid water supply pipelines (2) are communicated with one acid water tank (1) to convey acid water, and the other two acid water tanks (1) are used as standby acid water tanks of the two acid water supply pipelines (2) and correspond to the two acid water supply pipelines (2) one by one;
the volume of the acid water tank (1) is the total volume of the acid water supplied by the two acid water supply pipelines (2);
the acid water tank (1) is composed of a carbon steel body (101), wherein a layer of acid-resistant brick body (102) is additionally paved at the bottom of the tank inside the carbon steel body (101), and the acid-resistant brick body (102) is obliquely paved to form a slope;
a manhole (103) with the diameter of 900-1300 mm is arranged on the side wall of the lower part of the acid water tank (1), and the lower edge of the manhole (103) is close to the higher side of the slope;
the lower side wall of the acid water tank (1) is also provided with a tank discharge port (104) and a drain outlet (105) which is arranged adjacent to the tank discharge port (104) and is used for removing liquid phase dirt in the tank, and the tank discharge port (104) and the drain outlet (105) are adjacent to the lower side of the slope;
the tank discharge port (104) and the drain port (105) are provided on the side opposite to the manhole (103).
2. Acid water mechanism for MMA production apparatus according to claim 1, characterized in that the acid water supply pipeline (2) and the pipeline connected with the acid water tank (1), the pipeline connected with the acid water tank (1) and the discharging main pipe (3) and the pipeline connected with the discharging main pipe (3) and the conveying pump (4) are all provided with a switch valve (5) for switching on and off the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010239539.8A CN113461520B (en) | 2020-03-30 | 2020-03-30 | Acid water mechanism for MMA production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010239539.8A CN113461520B (en) | 2020-03-30 | 2020-03-30 | Acid water mechanism for MMA production device |
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| Publication Number | Publication Date |
|---|---|
| CN113461520A CN113461520A (en) | 2021-10-01 |
| CN113461520B true CN113461520B (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010239539.8A Active CN113461520B (en) | 2020-03-30 | 2020-03-30 | Acid water mechanism for MMA production device |
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Citations (10)
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|---|---|---|---|---|
| GB437197A (en) * | 1934-04-20 | 1935-10-21 | John William Croom Crawford | Improvements in or relating to the production of methacrylic acid and the alkyl esters thereof |
| CN2871543Y (en) * | 2006-01-17 | 2007-02-21 | 程润华 | Marsh-gas generator |
| CN201482476U (en) * | 2009-01-01 | 2010-05-26 | 中石油东北炼化工程有限公司吉林设计院 | Waste acid expansion tank for methyl methacrylate device |
| KR101279743B1 (en) * | 2012-01-13 | 2013-07-05 | 현대하이스코 주식회사 | Waste acid refining device and it's operatiing method |
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2020
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| KR101279743B1 (en) * | 2012-01-13 | 2013-07-05 | 현대하이스코 주식회사 | Waste acid refining device and it's operatiing method |
| CN106512879A (en) * | 2016-03-25 | 2017-03-22 | 中国石油集团东北炼化工程有限公司吉林设计院 | Method for preventing caking in esterification reactors in preparation of methyl methacrylate |
| CN205972482U (en) * | 2016-08-08 | 2017-02-22 | 厦门智欣建材集团有限公司 | Concrete additive jar |
| CN206927733U (en) * | 2017-09-06 | 2018-01-26 | 成都蜀菱科技发展有限公司 | Liquid waste treating apparatus |
| CN208248978U (en) * | 2018-05-23 | 2018-12-18 | 陵川县清凉太行农产品开发有限公司 | A kind of automatic slag discharge device for vegetable oil tank |
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| CN113461520A (en) | 2021-10-01 |
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