Rectifying tower for high-viscosity rapid settleability mash

Abstract

The invention discloses a rectifying tower for high-viscosity and rapid-settleability mash. The rectifying tower comprises a tower body; wherein a plurality of tower plates are arranged inside the tower body, a liquid receiving tray is arranged on one side of each tower plate, a downcomer is arranged on the other side of each tower plate, and a plurality of sieve pores, a plurality of bubbling promoters and a plurality of rectangular guide holes are uniformly distributed on each tower plate; the liquid receiving disc is connected with the inner wall of the tower body; and a demisting device is also arranged at the top in the tower body and is positioned above the plurality of tower plates. The continuous production capacity is high, vapor and liquid can be in full contact by adopting the efficient guide sieve plate, the mass transfer efficiency is high, entrainment entrainment is reduced, and the utilization efficiency of mash and the yield of ethanol are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distillation column equipment, and more specifically, to a distillation column for highly viscous and rapidly sedimentable mash liquid. Background Art

[0002] A distillation column is a tower-type gas-liquid contact device for carrying out distillation operations. It utilizes the different volatilities of the components in the mixture, that is, the property that the vapor pressures of the components are different at the same temperature. Through the countercurrent contact and mass transfer of the gas-liquid two-phase in the tower, the light components in the liquid phase are transferred to the gas phase, while the heavy components in the gas phase are transferred to the liquid phase, thereby realizing the separation of the mixture.

[0003] Traditional fossil fuels have many drawbacks, including non-renewability, environmental pollution, low energy utilization efficiency, etc. Biomass energy, as a clean and renewable energy form, has broad development prospects and great potential. Fuel ethanol is a green and renewable energy fermented from biomass, which can replace petroleum energy to reduce dependence on fossil fuels, reduce environmental pollution, and the relatively small amount of greenhouse gases emitted during combustion helps to improve the atmospheric environment. The raw materials for the preparation of ethanol are diverse, including biomass materials such as corn, sugarcane, and cellulose. Currently, the preparation of ethanol fuel from cellulose has better superiority and economy, solving the key problem of competing with people for food. Through the fermentation process, the sugars in the raw materials are converted into ethanol, and then the ethanol concentration is increased through steps such as distillation and dehydration, and finally ethanol that can be used as fuel is obtained.

[0004] Cellulose fermentation mash liquid has the characteristics of high viscosity, high solid content, easy sedimentation, and easy entrainment of mist. Therefore, developing a distillation column for highly viscous and rapidly sedimentable mash liquid to strengthen processes such as separation and purification, fully reduce production energy consumption, and improve ethanol yield is a key problem that urgently needs to be solved in the current ethanol production field. Summary of the Invention

[0005] In view of this, the present invention provides a distillation column for highly viscous and rapidly sedimentable mash liquid with reasonable structural design, sufficient gas-liquid contact inside the tower, and significantly reduced entrainment of mist.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A distillation column for highly viscous and rapidly sedimentable mash liquid, comprising: a tower body;

[0008] Wherein, a plurality of tower plates are arranged inside the tower body. A liquid receiving tray is arranged on one side of the tower plate, and a downcomer is arranged on the other side. A plurality of sieve holes, a plurality of bubble promoters, and a plurality of rectangular guiding holes are evenly distributed on the tower plate; the liquid receiving tray is connected to the inner wall of the tower body;

[0009] An entrainment separator is also provided at the top inside the tower body, and the entrainment separator is located above the plurality of trays.

[0010] Preferably, the rectification column for high-viscosity and fast-settling mash further comprises: a condenser;

[0011] A steam outlet is provided at the top of the tower body, and a reflux liquid inlet is provided on one side above the tower body; one end of the condenser is connected to the steam outlet, and the other end is connected to the reflux liquid inlet.

[0012] Preferably, the rectification column for high-viscosity and fast-settling mash further comprises: a reboiler;

[0013] A mash outlet is provided at the bottom of the tower body, and a steam inlet is provided on one side below the tower body; one end of the reboiler is connected to the mash outlet, and the other end is connected to the steam inlet.

[0014] Preferably, a mash inlet is provided in the middle of the tower body.

[0015] Preferably, the liquid receiving tray, the sieve holes, the bubble promoters, the rectangular guiding holes and the trays are of an integrally formed structure. The bubble promoters and the rectangular guiding holes strengthen the directional flow of the fluid and increase the effect of vapor-liquid mass transfer.

[0016] Preferably, the entrainment separator is a new type of high-efficiency wire mesh entrainment separator made of metal wire, which can remove most of the entrained mist.

[0017] Preferably, the outer surface of the tower body is covered with a heat-insulating layer, which can reduce and prevent heat loss and greatly improve the energy utilization rate.

[0018] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention has a simple and reasonable design structure and strong continuous production capacity. By providing sieve holes, guide plates and bubble promoters on the trays, the vapor and liquid can be fully contacted, and the mass transfer efficiency is high. In the separation of C5 fractions, the production of isoprene often causes blockage of traditional trays due to easy self-polymerization of the materials. The high-efficiency guide sieve tray promotes the uniform flow of the liquid through the design of the guiding holes, eliminates the liquid level drop, greatly extends the continuous operation period of the isoprene extraction rectification column from 15-25 days, improves the processing capacity and eliminates the production bottleneck, and the economic benefits are remarkable; by using a new type of high-efficiency wire mesh entrainment separator, the entrained mist at the steam outlet is reduced, and the utilization efficiency of the mash and the yield of ethanol are greatly improved. In the vinyl acetate synthesis process, the acetylene gas is easily entrained with water mist after being washed with water, resulting in side reactions to generate impurities such as acetaldehyde. After installing this entrainment separator, the water mist removal rate reaches 99%, the by-product acetaldehyde is reduced by 1 percentage point, and the crotonaldehyde is reduced by 0.5 percentage point, significantly improving the yield of the target product. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0021] Figure 1 It is a schematic structural diagram of a rectifying column for highly viscous and rapidly sedimenting mash of the present invention;

[0022] Figure 2 It is a schematic structural diagram of a tray of the present invention;

[0023] Figure 3 It is an enlarged schematic structural diagram of a demister of the present invention.

[0024] Among them, in the figure:

[0025] Tower body 1, condenser 2, reboiler 3, reflux liquid inlet 4, steam inlet 5, mash inlet 6, steam outlet 7, waste mash outlet 8, tray 9, demister 10, liquid receiving tray 11, sieve holes 12, bubble promoters 13, downcomer 14, rectangular guiding holes 15. Specific embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Embodiment 1

[0028] This embodiment provides a rectifying column for highly viscous and rapidly sedimenting mash, including: tower body 1, condenser 2 and reboiler 3;

[0029] Among them, several trays 9 are arranged inside the tower body 1. A liquid receiving tray 11 is arranged on one side of the tray 9, and a downcomer 14 is arranged on the other side. A number of sieve holes 12, a number of bubble promoters 13 and a number of rectangular guiding holes 15 are evenly distributed on the tray 9; the liquid receiving tray 11 is connected to the inner wall of the tower body 9;

[0030] A demister 10 is also arranged at the top inside the tower body 9, and the demister 10 is located above several trays 9.

[0031] A steam outlet 7 is provided at the top of the tower body 9, and a reflux liquid inlet 4 is provided on one side above the tower body 9; one end of the condenser 2 is connected to the steam outlet 7, and the other end is connected to the reflux liquid inlet 4.

[0032] A mash outlet 8 is provided at the bottom of the tower body 9, and a steam inlet 5 is provided on one side below the tower body; one end of the reboiler 3 is connected to the mash outlet 8, and the other end is connected to the steam inlet 5.

[0033] A mash inlet 6 is provided in the middle of the tower body 9.

[0034] The liquid receiving tray 11, the sieve holes 12, the bubble promoter 13, the rectangular guiding holes 15 and the tray 9 are of an integrally formed structure. The bubble promoter 13 and the rectangular guiding holes 15 strengthen the directional flow of the fluid and increase the effect of vapor-liquid mass transfer.

[0035] The demisting device 10 is a new type of high-efficiency wire mesh demister made of metal wires, which can remove most of the entrained mist.

[0036] The outer surface of the tower body 9 is covered with a heat-insulating layer, which can reduce and prevent heat loss and greatly improve the energy utilization rate.

[0037] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A distillation tower for high-viscosity, fast-settling mash, characterized in that: include: tower body; The tower body is provided with a plurality of tower plates, one side of the tower plate is provided with a liquid receiving pan, and the other side is provided with a downcomer, and the tower plate is evenly distributed with a plurality of sieve holes, a plurality of bubbling promoters and a plurality of rectangular guide holes; the liquid receiving pan is connected to the inner wall of the tower body; A demisting device is also provided on the top of the tower body, and the demisting device is located above the plurality of tower plates.

2. A distillation tower for high-viscosity, fast-settling mash according to claim 1, characterized in that: Also includes: Condenser; The top of the tower body is provided with a steam outlet, and one side above the tower body is provided with a reflux liquid inlet; One end of the condenser is connected to the steam outlet, and the other end is connected to the reflux liquid inlet.

3. A distillation tower for high-viscosity, fast-settling mash according to claim 1, characterized in that: Also includes: Reboiler; The bottom of the tower body is provided with a mash outlet, and a steam inlet is provided on one side below the tower body; one end of the reboiler is connected to the mash outlet, and the other end is connected to the steam inlet.

4. A distillation tower for high-viscosity, fast-settling mash according to claim 1, characterized in that: A mash inlet is arranged in the middle of the tower body.

5. A distillation tower for high-viscosity, fast-settling mash according to claim 1, characterized in that: The liquid receiving tray, the sieve holes, the bubbling promoter, the rectangular guide holes and the tower plate are an integrated structure.

6. A distillation tower for high-viscosity, fast-settling mash according to claim 1, characterized in that: The demisting device is a new type of high-efficiency wire mesh demisting device woven with metal wires.

7. A distillation tower for high-viscosity, fast-settling mash according to claim 1, characterized in that: The outer surface of the tower body is covered with a thermal insulation layer.

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