阅读说明：本技术 用于mma生产装置的酸水机构 (Acid water mechanism for MMA production device ) 是由 毛爽 吴伟 刘明东 刘伟明 苑文博 赵晓君 谭长斌 尹三琴 耿金伟 王金宝 于 2020-03-30 设计创作，主要内容包括：本发明涉及一种用于MMA生产装置的酸水机构,包括：多个酸水罐(1),与所述酸水罐(1)配合布置用于向所述多个酸水罐(1)供给酸水的酸水供给管路(2),连通多个所述酸水罐(1)用于运输从酸水罐(1)中出料的出料总管(3),以及连接所述出料总管(3)用于将所述出料总管(3)中的废酸排出的输送泵(4)。本发明提出的酸水机构中的设备和管道等的设置,能够实现在装置运转时,酸水机构内各罐之间能够互相切换、备用,明显减少了酸水罐的清罐周期和时长,使得整个酸水系统能够平稳运行,保证了装置的正常运转。(The invention relates to an acid water mechanism for an MMA production device, which comprises: the acid water tank conveying device comprises a plurality of acid water tanks (1), acid water supply pipelines (2) which are matched with the acid water tanks (1) and 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 used for conveying materials discharged from the acid water tanks (1), and a conveying pump (4) which is connected with the discharging main pipe (3) and used for discharging waste acid in the discharging main pipe (3). The arrangement of the equipment, the pipeline and the like in the acid water mechanism can realize that all tanks in the acid water mechanism can be mutually switched and reserved when the device operates, obviously reduces the tank cleaning period and time of the acid water tank, ensures that the whole acid water system can stably operate, and ensures the normal operation of the device.)

1. An acid water mechanism for an MMA production device, comprising: the acid water tank conveying device comprises a plurality of acid water tanks (1), acid water supply pipelines (2) which are matched with the acid water tanks (1) and 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 used for conveying materials discharged from the acid water tanks (1), and a conveying pump (4) which is connected with the discharging main pipe (3) and used for discharging waste acid in the discharging main pipe (3).

2. The acid water mechanism for an MMA production apparatus according to claim 1, wherein a pipeline connecting the acid water supply pipeline (2) and the acid water tank (1), a pipeline connecting the acid water tank (1) and the discharge header pipe (3), and a pipeline connecting the discharge header pipe (3) and the delivery pump (4) are provided with a switch valve (5) for switching on and off the pipelines.

3. Acid water unit for MMA production device according to claim 1, wherein said acid water tank (1) is composed of carbon steel body (101), inside carbon steel body (101), a layer of acid-proof brick body (102) is additionally laid on the bottom of the tank, and said acid-proof brick body (102) is laid obliquely to form a slope.

4. Acid water mechanism for MMA production according to claim 3, characterized by that, the lower side wall of the acid water tank (1) is provided with a manhole (103) with diameter 900-1300 mm, and the lower edge of the manhole (103) is next to the upper side of the slope.

5. The acid water mechanism for an MMA production apparatus according to claim 4, wherein the lower side wall of the acid water tank (1) is further provided with a tank outlet (104) and a drain outlet (105) disposed adjacent to the tank outlet (104) for draining liquid phase dirt in the tank, and the tank outlet (104) and the drain outlet (105) are adjacent to the lower side of the slope.

6. Sour water unit for MMA production according to claim 5, characterized in that tank outlet (102) and the drain (103) are provided on the opposite side to the manhole (101).

7. The acid water mechanism for an MMA production apparatus according to any one of claims 1 to 6, comprising two acid water tanks (1) and one acid water supply line (2), wherein the acid water supply line (2) is communicated with one of the acid water tanks (1) to convey acid water, and the other acid water tank (1) is subjected to tank cleaning treatment.

8. The acid water mechanism for an MMA production apparatus according to any one of claims 1 to 6, comprising three acid water tanks (1) and one acid water supply line (2), wherein the acid water supply line (2) is communicated with one of the acid water tanks (1) to convey acid water, and one of the other two acid water tanks (1) is used for tank cleaning and the other is used as a spare acid water tank.

9. The acid water mechanism for an MMA production apparatus according to any one of claims 1 to 5, comprising three acid water tanks (1) and two acid water supply lines (2), wherein two of the acid water supply lines (2) each communicate with one of the acid water tanks (1) to convey acid water, and the other two of the acid water tanks (1) serve as reserve acid water tanks for the two acid water supply lines (2) and correspond one-to-one to the two acid water supply lines (2).

10. The acid water mechanism for an MMA production device according to claim 8, wherein the volume of the acid water tank (1) is the total volume of acid water supplied by the two acid water supply lines (2).

Technical Field

The invention relates to an acid water mechanism for an MMA (methyl methacrylate) production device.

Background

Methyl Methacrylate (MMA) is an important organic chemical raw material and chemical product, can be polymerized by self 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, can also be used for a second monomer, resin, adhesive, coating, medical functional material and the like in acrylic fiber production, and has very wide application.

Currently, methyl methacrylate production technologies adopted at home and abroad mainly include an Acetone Cyanohydrin (ACH) method, an isobutylene oxidation method and an ethylene method, ACH method technology is mainly adopted in north america and western europe, isobutene is mainly adopted in japan as a raw material, and Alpha technology of the british cellulote (Lucite) company is mainly used in the industrial production process for preparing methyl methacrylate by using ethylene as a raw material.

The Acetone Cyanohydrin (ACH) method is continuously improved and improved for a long time, has advanced technology, maturity and reliability and good product quality, is a main production method of MMA, and has the capacity accounting for more than 80 percent in the global range. The process can effectively utilize hydrocyanic acid which is a byproduct of an acrylonitrile device, and has higher MMA yield, which is an important technical advantage.

In the Acetone Cyanohydrin (ACH) method, Methyl Methacrylate (MMA) product is sent to a rectification separation device from the gas phase of an esterification kettle, kettle liquid (waste acid water) is sent to an acid water tank, and after light components are recovered by steam stripping, the residual waste acid is sent to a waste acid recovery device. In the esterification process, can produce a heavy ends (asphaltene) usually in the cauldron liquid of esterifying, along with the sour water together enters into the sour water storage tank along the pipeline, fall to the storage tank bottom, through constantly accumulating, form asphaltene precipitate layer, consequently sour water tank need regularly open the jar and carry out artifical clearance, this kind of asphaltene appears the semisolid colloidal state for black from the outward appearance, clear jar in-process, after its contact air after opening the jar, can become a surface slightly hard, the material of similar cinder.

The sour water has the acid corrosion characteristic, and consequently sour water jar generally is carbon steel lining acid-resistant brick structure, and relative steel storage tank, this kind of material is very easy to be damaged at the clear jar in-process, and because the volume of asphaltene is great, generally fifteen days to twenty days or so just need clear up once, and the frequency of clear jar is higher again, consequently, in order not to influence the normal production of device, how to set up one set can effectively switch the sour water system of being equipped with each other and just very important.

Disclosure of Invention

The invention aims to solve the problems and provides an acid water mechanism for an MMA production device.

In order to achieve the above object, the present invention provides an acid water mechanism for an MMA production apparatus, comprising: the acid water tank comprises a plurality of acid water tanks, acid water supply pipelines which are matched with the acid water tanks and used for supplying acid water to the acid water tanks, a discharge main pipe which is used for conveying materials discharged from the acid water tanks and is connected with the discharge main pipe and used for discharging waste acid in the discharge main pipe.

According to one aspect of the invention, the pipeline connecting the acid water supply pipeline and the acid water tank, the pipeline connecting the acid water tank and the discharge main pipe and the pipeline connecting the discharge main pipe and the delivery pump are provided with switch valves for switching on and off the pipelines.

According to one aspect of the invention, the sour water tank is composed of a carbon steel body, and an acid-proof brick body is additionally paved on the bottom of the tank inside the carbon steel body, and the acid-proof brick body is obliquely paved to form a slope.

According to one aspect of the invention, the side wall of the lower part of the sour water tank is provided with a manhole with the diameter of 900-1300 mm, and the lower edge of the manhole is close to the higher side of the slope surface.

According to one aspect of the invention, the side wall of the lower part of the sour water tank is also provided with a tank discharge port and a drain outlet which is arranged adjacent to the tank discharge port and used for draining liquid phase dirt in the tank, and the tank discharge port and the drain outlet are close to the lower side of the slope surface.

According to an aspect of the present invention, the tank discharge port and the drain outlet are disposed at a side opposite to the manhole.

According to one aspect of the invention, the acid water cleaning device 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 cleaned.

According to one aspect of the invention, the acid water cleaning device comprises three 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, one of the other two acid water tanks is used for cleaning, and the other one is used as a spare acid water tank.

According to one aspect of the invention, the acid water tank comprises three acid water tanks and two acid water supply pipelines, wherein the two acid water supply pipelines are communicated with one acid water tank 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 in a one-to-one mode.

According to one aspect of the invention, the volume of the sour water tank is the total volume of the two sour water supply lines supplying sour water.

According to one scheme of the invention, the tanks in the acid water mechanism can be switched and reserved when the device operates, so that the tank cleaning period and time of the acid water tank are obviously reduced, the whole acid water system can stably operate, 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 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram showing the construction of an acid water unit for an MMA-producing apparatus according to an embodiment of the present invention;

fig. 2 schematically shows a front view of a sour water tank, according to one embodiment of the present 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 used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship shown in the associated drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above-described terms should not be construed as limiting the present invention.

The present invention is described in detail below with reference to the drawings and the specific embodiments, which are not repeated 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 unit for an MMA production apparatus according to an embodiment of the present invention. As shown in fig. 1, the acid water mechanism for an MMA production apparatus according to the present invention comprises a plurality of acid water tanks 1, an acid water supply line 2, a discharge header pipe 3, and a delivery pump 4. In the present embodiment, the supply line 2 is disposed in cooperation with the acid water tank 1 in an amount determined according to the amount of the acid water tank 1, and the supply line 2 communicates with the acid water tank 1 through a line to supply acid water to the acid water tank 1. The discharge main 3 is arranged below the acid water tanks 1 and communicated with the acid water tanks 1 through pipelines for discharging the waste acid discharged from the acid water tanks 1, and in the embodiment, the discharge main 3 conveys the waste acid to the conveying pump 4 through the pipelines and then discharges the waste acid to the waste acid recovery device through the conveying pump 4.

In the embodiment, independent switch valves 5 for switching on and off the pipelines are arranged on each pipeline connected with the acid water tank 2 and the acid water tank 1, each pipeline connected with the acid water tank 1 and the discharge main pipe 3 and the pipeline connected with the discharge main pipe 3 and the delivery pump 4, so that each pipeline can be independently controlled, the feeding and discharging of each acid water tank can be controlled, the specific work treatment according to the working condition is realized, and the mechanism disclosed by the invention is more flexible and changeable and is suitable for different production environments.

Fig. 2 schematically shows a front view of a sour water tank, according to one embodiment of the present invention. As shown in fig. 2, in the present embodiment, the sour water tank 1 is made 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 junction in the figure. In the present embodiment, a manhole 103 having a diameter of 900 to 1300mm is provided on a lower side wall of the carbon steel body 101 of the sour water tank 1, and as can be seen from the figure, the manhole 103 is provided at the bottom of the side wall of the carbon steel body 101, and is adjacent to a side where a slope surface rises, that is, a higher side than the other side of the slope surface. Further, in the present embodiment, the lower side wall of the carbon steel body 101 of the sour water tank 1 is further provided with a tank outlet 104 and a drain 105 for draining liquid phase dirt in the tank, which is disposed adjacent to the tank outlet 104, and as can be seen from the figure, the tank outlet 104 and the drain 105 are located adjacent to the side where the slope is lowered, that is, the side lower than the side where the slope is raised. A tank discharge port 104 and a drain outlet 105 are provided at a side opposite to the manhole 101. In the present embodiment, the height H2 of the sewage outlet 105 from the bottom of the carbon steel body of the sour water tank 1 should be the minimum value as much as possible. In the invention, the manhole 103 is arranged to facilitate an operator to enter the acid water tank, to perform slag removal, inspection, maintenance and other work 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 cleaned. Moreover, in this embodiment, manhole 103 position sets up in jar body lower part, and manhole 103 lower limb is kept level as far as possible with carbon steel body bottom, makes the slope with acid-proof brick at the tank bottoms portion, and the design can guarantee to let the workman when cleaning the jar, can directly push out asphaltene from the manhole directly, improves the efficiency of cleaning the jar, shortens the time of cleaning the jar for sour water jar can put into use as early as possible.

In the present invention, as described above, a plurality of sour water tanks 1 may be provided, and one or more sour water supply lines 2 may be provided in association with the sour water tanks 1. According to one embodiment of the present invention, as shown in fig. 1, three acid water tanks 1 and two acid water supply lines 2 are provided, wherein each of the two acid water supply lines 2 is communicated with one of the acid water tanks 1 to convey acid water, and the other two acid water tanks 1 are used as spare acid water tanks for the two acid water supply lines 2 and are communicated with the two acid water supply lines 2 in a one-to-one correspondence.

According to another embodiment of the invention, two acid water tanks 1 and one acid water supply pipeline 2 are provided, the acid water supply pipeline 2 is communicated with one acid water tank 1 to convey acid water, and the other acid water tank 1 is subjected to tank cleaning treatment, and the cleaned tank can be used as a standby acid water tank or directly used as an operating tank.

According to the third embodiment of the present invention, three acid water tanks 1 and one acid water supply line 2 are provided, the acid water supply line 2 is communicated with one of the acid water tanks 1 to supply acid water, one of the other two acid water tanks 1 is cleaned, and the other one is used as a spare acid water tank.

According to the arrangement of the device, after the device runs for a period of time, the effect is effectively verified, the three acid water tanks can be switched and reserved well 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 the equipment, the pipeline and the like in the acid water mechanism can realize that the tanks in the acid water mechanism can be mutually switched and reserved when the device operates, obviously reduces the tank cleaning period and time of the acid water tank, ensures that the whole acid water system can stably operate, and ensures the normal operation of the device.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.