Novel separation rectifying tower system
By employing a separation distillation column system in the MMA production process, which is divided into an upper column and a lower column, and utilizing the interconnected structure of a sieve plate and an MMA-water separator, the problem of high MMA content in low-boiling-point substances is solved, achieving a separation effect with low consumption and high yield.
Patent Information
- Application Number
- CN202520104478.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In the existing MMA production process, the low-boiling fractions contain a high amount of MMA during the separation and distillation of crude MMA, which leads to increased consumption and affects product yield.
The separation distillation column system is divided into an upper column and a lower column, and is equipped with a sieve plate. Gas passes through and liquid is connected through an MMA-water separator to increase the separation effect. The low-boiling-point MMA content distilled from the top of the column is low, resulting in low consumption and high yield.
It improved the separation effect of MMA, reduced consumption, increased product yield, and resulted in a low content of low-boiling-point MMA in the distillate at the top of the column.
Smart Images
Figure CN223774330U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to rectifying tower technical field, concretely is a new type separation rectifying tower system. BACKGROUND
[0002] Rectifying tower is a tower type vapor-liquid contact device for rectification, which makes light components (low-boiling substances) in liquid phase transfer to gas phase, and heavy components (high-boiling substances) in gas phase transfer to liquid phase, so as to realize the purpose of separation. Rectifying tower is also a kind of mass transfer and heat transfer device widely used in petroleum chemical production. In the production process of MMA, the separation and rectification of crude MMA directly affect the yield and consumption of products, and in the existing separation process of rectifying tower, the low-boiling substances separated usually contain a high content of MMA, which needs to be rectified repeatedly, affecting the consumption. SUMMARY
[0003] In view of the deficiencies of the prior art, the utility model provides a new type separation rectifying tower system, which solves the problem that the separation of crude MMA in the existing MMA production process is not good, the content of MMA entrained in low-boiling substances increases, and the consumption is affected.
[0004] To achieve the above purpose, the utility model realizes the following technical scheme: a new type separation rectifying tower system, comprising a separation rectifying tower body, the separation rectifying tower body is divided into an upper section tower and a lower section tower, a plurality of sieve plates are arranged in the upper section tower and the lower section tower, a tee pipe is connected to the lower end side wall of the upper section tower, and a first conveying pipe is connected to the upper end side wall of the lower section tower.
[0005] The outer side of the separation rectifying tower body is provided with an MMA-water separation tank and a product rectifying tower.
[0006] One end of the tee pipe and the first conveying pipe are both in communication with the MMA-water separation tank, a second conveying pipe is connected between the product rectifying tower and the lower section tower, and a transmission mechanism is arranged on the product rectifying tower.
[0007] Preferably, the transmission mechanism comprises a tee conveying pipe connected to the bottom of the product rectifying tower, the two ends of the tee conveying pipe are respectively connected with a third conveying pipe and a fourth conveying pipe, one end of the third conveying pipe is in communication with the bottom of the lower section tower, and an inflow pipe and an outflow pipe are connected to the side wall of the product rectifying tower.
[0008] Preferably, the other end of the tee pipe is provided with a guide pipe, and a control valve is connected to the guide pipe.
[0009] Preferably, the lower end of the MMA-water separation tank is provided with a fifth conveying pipe.
[0010] Advantages
[0011] The utility model provides a novel separation rectifying column system has the following beneficial effects:
[0012] The separation rectifying column body is composed of the upper section tower and the lower section tower, adopts multiple groups of sieve plate type separation in the inside, the tower body forms the closed two section towers, only can pass through the gas between the two section towers, and the liquid is connected and transported through MMA and water separation tank, so as to increase the separation effect, makes the material each component separation effect good, the low boiling point substance MMA content of tower top evaporation is low, the consumption is low, the yield is high, reduces the consumption. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the structure schematic diagram of the utility model.
[0014] In the drawing: 1, separation rectifying column body, 2, MMA-water separation tank, 3, upper section tower, 4, lower section tower, 5, product rectifying column, 6, third conveying pipe, 7, tee pipe, 8, first conveying pipe, 9, fifth conveying pipe, 10, control valve, 11, fourth conveying pipe, 12, inflow pipeline, 13, outflow pipeline, 14, sieve plate, 15, second conveying pipe. DETAILED DESCRIPTION
[0015] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative efforts belong to the range of protection of the utility model.
[0016] Please refer to Figure 1 The utility model provides a technical scheme: a novel separation rectifying column system, including separation rectifying column body 1, separation rectifying column body 1 is divided into upper section tower 3 and lower section tower 4, be equipped with a plurality of sieve plate 14 in upper section tower 3 and lower section tower 4, the lower end lateral wall of upper section tower 3 is connected with tee pipe 7, the upper end lateral wall of lower section tower 4 is connected with first conveying pipe 8;
[0017] The outside of separation rectifying column body 1 is equipped with MMA-water separation tank 2 and product rectifying column 5;
[0018] One end of tee pipe 7 and first conveying pipe 8 are connected with MMA-water separation tank 2, and second conveying pipe 15 is connected between product rectifying column 5 and lower section tower 4, and transmission mechanism is arranged on product rectifying column 5.
[0019] Conveying pipe is a kind of pipeline system, usually has conveying pump and pipeline and valve composition, this structure belongs to the mature technology of prior art, it belongs to conventional equipment in chemical industry, thus without introducing the specific structure and use method of each conveying pipe.
[0020] The sieve plate 14 is composed of 32 pieces, the tower body forms a closed two-section tower, only gas can pass between the two-section tower, liquid is connected and transported through the MMA and water separation tank to increase the separation effect and reduce consumption.
[0021] Further, the transmission mechanism comprises a three-way pipe connected at the bottom of the product rectification tower 5, two ends of the three-way pipe are respectively connected with the third conveying pipe 6 and the fourth conveying pipe 11, one end of the third conveying pipe 6 is connected with the bottom of the lower section tower 4, and the side wall of the product rectification tower 5 is connected with the inflow pipe 12 and the outflow pipe 13.
[0022] Further, the other end of the three-way pipe 7 is provided with a guide pipe, and the guide pipe is connected with the control valve 10.
[0023] Further, the lower end of the MMA-water separation tank 2 is provided with the fifth conveying pipe 9.
[0024] By the skilled in the art, the parts in the case are sequentially connected, the specific connection and operation sequence should be referred to the following working principle, and the detailed connection means is the public known technology in the art, and the following mainly introduces the working principle and process.
[0025] Embodiment: In use, the separation rectification tower body 1 adopts vacuum rectification. The crude MMA enters the separation rectification tower body 1 under the control of the flow regulating valve, and then the mass transfer of the gas-liquid phase is carried out, the low-boiling substances evaporated from the top of the tower enter the tower top condenser, the uncondensed gas phase enters the after-condenser and is cooled by the circulating cooling water and the refrigerated brine, the condensate enters the low-boiling substance tank, and finally the uncondensed gas is separated by the vacuum system gas-liquid separation tank, the gas is discharged through the venting system and is burned in the flare, and the low-boiling substance components from the low-boiling substance tank are transported by the conveying pump and are divided into two parts, the first part is sent to the extraction system or the prepared polymerization inhibitor solution, and the second part enters the top of the separation rectification tower for reflux to maintain the stable operation of the tower.
[0026] The MMA and the high-boiling substances enter the MMA and water separation tank at the bottom of the upper section tower 3 by gravity, are mixed with the desalted water, are washed by water, and are divided into two layers, the upper organic phase returns to the top of the lower section tower 4 by gravity to continue distillation.
[0027] The water phase in the lower layer of the MMA-water separation tank 2 is transported by the conveying pump, is transported to the extraction system under the control of the liquid level of the MMA-water separation tank 2, and is recycled.
[0028] The organic phase returned to the lower section is subjected to the mass transfer, heat transfer and evaporation of the lower section tower 3, and then the remaining material is transported from the bottom of the tower by the third conveying pipe 6 and enters the product rectification tower 5 to separate the high-boiling substances, and finally the MMA product with a purity of 99.9% is obtained.
[0029] It has to be noted that, in the present document, the terms "first", "second", etc. merely serve to identify a subject or action, without necessarily requiring or implying any actual relationship or order between such subjects or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In other words, without further restriction, the term "comprises" does not exclude the presence of additional elements in the process, method, article, or apparatus that includes the elements listed in the process, method, article, or apparatus.
[0030] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A novel separation rectifying column system, comprising a separation rectifying column body (1), characterized in that: the separation rectifying column body (1) is divided into an upper section column (3) and a lower section column (4), a plurality of sieve plates (14) are arranged in the upper section column (3) and the lower section column (4), a three-way pipe (7) is connected to the lower end side wall of the upper section column (3), and a first conveying pipe (8) is connected to the upper end side wall of the lower section column (4); an MMA-water separation tank (2) and a product rectifying column (5) are arranged outside the separation rectifying column body (1); one end of the three-way pipe (7) and the first conveying pipe (8) are both in communication with the MMA-water separation tank (2), a second conveying pipe (15) is connected between the product rectifying column (5) and the lower section column (4), and a transmission mechanism is arranged on the product rectifying column (5).
2. A novel split fractionating column system according to claim 1, characterized in that, the transmission mechanism comprises a three-way conveying pipe connected to the bottom of the product rectifying column (5), both ends of the three-way conveying pipe are connected with a third conveying pipe (6) and a fourth conveying pipe (11), one end of the third conveying pipe (6) is in communication with the bottom of the lower section column (4), and an inflow pipe (12) and an outflow pipe (13) are connected to the side wall of the product rectifying column (5).
3. A novel split fractionating column system according to claim 1, characterized in that, a guide pipe is arranged on the other end of the three-way pipe (7), and a control valve (10) is connected to the guide pipe.
4. A novel split fractionating column system according to claim 1, characterized in that, a fifth conveying pipe (9) is arranged at the lower end of the MMA-water separation tank (2).