CN2707362Y

CN2707362Y - Disc reactor

Info

Publication number: CN2707362Y
Application number: CN 200420064712
Authority: CN
Inventors: 周华堂; 顾爱军; 张莼; 黄家祺; 茅建民
Original assignee: China Textile Industry Design Institute
Current assignee: China Textile Industry Design Institute; China Textile Industrial Engineering Institute
Priority date: 2004-06-02
Filing date: 2004-06-02
Publication date: 2005-07-06
Anticipated expiration: 2014-06-02

Abstract

The utility model discloses a new type disc reactor, including a sealed transverse cylinder. The cylinder is provided with a material inlet and a material outlet, and the interior of the cylinder is pivoted with an actuating shaft. A plurality of groups of annular discs are fixed installed on the actuating shaft, and the side parts of the annular discs are fixed installed with a plurality of parallel axial direction film-drawing steel plates. A vertical film and a parallel film are formed in the process of the new type disc reactor by the utilization of the annular discs and the axial direction film-drawing steel plates, which accordingly increases the quantity of material liquid film carried by the inner space of the reactor, augments the mass transfer area of the reactor and efficiently improves stirring efficiency.

Description

Novel disk reactor

Technical field

The utility model relates to a kind of chemical reaction device, more particularly, relates to the poly-employed novel disk reactor of reactions steps of a kind of PETG (PET) production process final minification.

Background technology

The production process of polyester is earlier raw material ethylene glycol (EG) and terephthalic acid (TPA) (PTA) to be mixed into slurry by certain mol proportion, under certain temperature and pressure slurry being made esterification handles, generate ethylene glycol terephthalate (BHET), then by the synthetic PETG (PET) of polycondensation reaction.Wherein polycondensation process includes the poly-course of reaction of final minification that is used to control the prepolymerization reaction process of reaction rate and is used to control mass transfer rate.

The final polycondensation reactor that is adopted in the poly-course of reaction of final minification mostly adopts the horizontal reactor of high liquid holdup at present, the operation principle of this reactor is that the material of handling through precondensation is imported in the cylindrical shell, by means of the rotation that is located at the inner barrel disk, make the PET melt stick to disc surfaces, and at gravity, the effect that is located at the cylinder inboard wall scraper plate forms the certain thickness film that hangs down down, because liquid film keeps falling, constantly produce new interface in inner barrel, promptly form more new phenomenon of so-called interface, the glycol molecule of deviating among the PET is able at the interface, escape in the film place that hangs down, obtain molecular chain length, the PET that viscosity is higher, so under the effect that disk rotates and liquid level substitutes, polycondensation reaction is constantly gone on, obtain the higher PETG of viscosity.But because the existing formed liquid film of final polycondensation reactor is all perpendicular to the driving shaft of disk, promptly only in the plane of disk, form liquid film, make that the bath surface that is used for the evaporation of PET ethylene glycol is long-pending little, and in order to increase disengagement area and gas phase circulation area, currently used method is the volume that increases cylindrical shell, and set up many group disks in inner barrel, but the final polycondensation reactor that adopts this method has can not make full use of reactor inner space, reactor volume is excessive, takes up room excessive and cost is crossed problems such as height.

Creator in the utility model relies on it to be engaged in the experience and the practice of relevant industries for many years for this reason, and, create a kind of novel disk reactor that under the prerequisite that does not increase the cylindrical shell volume, can make full use of the inner barrel space, increase mass transfer area and the poly-efficient of raising final minification finally through concentrating on studies and developing.

Summary of the invention

Main purpose of the present utility model is to provide a kind of novel disk reactor, this novel disk reactor in use can form respectively vertically, be parallel to the vertical film and the parallel membrane of disk driving shaft, thereby can effectively increase the mass-transfer efficiency of mass transfer area and raising reactor.

Novel disk reactor in the utility model includes the pressure-bearing type cylindrical shell of a sealing, this cylindrical shell is provided with material inlet and material outlet, and be pivoted with a driving shaft in inner barrel, be installed with many group ring dishes on this driving shaft, it is characterized in that: the one or both sides of described ring dish are installed with the parallel axial membrane steel plate of polylith.

Described driving shaft is a hollow shaft.

Described axial membrane steel plate and the welding of ring dish are fixing.

Rounded or the Long Circle of the cross section of described cylindrical shell, the axle center of described driving shaft are positioned at the described cylindrical shell center of circle or down round circle centre position.

Novel disk reactor in the utility model is with separable ring dish structure, in use can make the PET melt form two kinds of films, a kind of film (abbreviation vertical film) that is perpendicular to airflow direction in the reactor, another kind is the film (abbreviation parallel membrane) that is parallel to airflow direction in the reactor, owing between two parallel disks, increased parallel membrane, thereby increased the amount of reactor inner space belongings feed liquid film, increased the reactor mass transfer area, effectively raised stirring efficiency.Because the chance of this kind reactor liquid phase film forming increases, the volatile matter of deviating from increases, so be provided with enough gas phase circulation areas at the top, facility is discharged gas, the mass transfer effect of intensified response.

Description of drawings

Fig. 1 is the structural representation of novel disk reactor in the utility model;

Fig. 2 is the structural representation of combined disk in the utility model.

The specific embodiment

As depicted in figs. 1 and 2, novel disk reactor in the utility model includes an airtight cylindrical shell 1, this cylindrical shell 1 is horizontal setting, and the cross section is rounded or Long Circle, be provided with a material inlet 10 and a material outlet 11 respectively at cylindrical shell 1 both ends, this reactor also includes one makes air communication cross the feeder of inside reactor, takes away ethylene glycol and hydrone fast to utilize air-flow, because this part-structure is a prior art, no longer describes in detail at this.Between the end cap at cylindrical shell 1 both ends, be pivoted with a hollow drive shaft 12 of being used to wear whole cylindrical shell 1, when the cross section of cylindrical shell 1 is rounded, hollow drive shaft 12 is positioned at circle centre position, when the cross section is Long Circle, hollow drive shaft 12 is positioned at circle centre position down, the end that this driving shaft 12 extends cylindrical shell 1 connects with transmission device, motor, and by motor-driven.Be positioned at the position of cylindrical shell 1 inside at driving shaft 12, fixed-site near material inlet 10 has many group circular hole dishes 15, so that take up rarer material, form liquid film, hold row at driving shaft 12 level with both hands near one of material outlet 11 and be installed with many group ring dishes 13, as shown in Figure 2, the centre of this ring dish 13 is provided with the perforation 130 that a plurality of equal angles distribute, and between two perforation 130, form a ribs 131, on each ribs 131, be installed with the parallel axial membrane steel plate 14 of polylith, on the inwall of cylindrical shell 1, adopt slot to be connected with the scraper plate (not shown) simultaneously, by adjusting scraper plate and axial membrane steel plate 14, ring dish 13, the thickness of liquid film 16 is controlled in gap between the circular hole dish 15.As shown in Figure 3, axially membrane steel plate 14 by in thick corrosion resistant plate cutting form, with the side of ring dish 13 by being welded to connect, reducing the use of connectors such as bolt, nut, thereby can stop part falls into cylindrical shell 1 inside, accidents caused.

Novel disk reactor in the utility model in use utilizes circular hole dish 15, ring dish 13 and the axially rotation of membrane steel plate 14, the material of cylindrical shell 1 bottom is taken up, form film, promptly form film (abbreviation vertical film) respectively and be parallel to the film (abbreviation parallel membrane) of airflow direction (driving shaft) in the reactor perpendicular to airflow direction in the reactor (driving shaft), thereby increased the amount of belongings feed liquid film in the unit agitator action space, help the evaporation of ethylene glycol and hydrone, increase the reactor mass transfer area, effectively raised stirring efficiency.Because the chance of this kind reactor liquid phase film forming increases, the volatile matter of deviating from increases, so be provided with enough gas phase circulation areas at the top, facility is discharged gas, the mass transfer effect of intensified response.In addition, the novel disk reactor in the utility model adopts hollow shaft owing to adopt the structure of combined type agitator to make that agitator self rigidity is strengthened in addition, can obviously reduce the metal consumption of agitator, has improved the reliability of agitator.

Claims

1. novel disk reactor, include the pressure-bearing type cylindrical shell of a sealing, this cylindrical shell is provided with material inlet and material outlet, and be pivoted with a driving shaft in inner barrel, be installed with many group ring dishes on this driving shaft, it is characterized in that: described ring dish is installed with the parallel axial membrane steel plate of polylith in its one or both sides.

2. according to the novel disk reactor described in the claim 1, it is characterized in that: described driving shaft is a hollow shaft.

3. according to the novel disk reactor described in claim 1 or 2, it is characterized in that: described axial membrane steel plate is directly fixing with described ring dish welding.

4. according to the novel disk reactor described in claim 1 or 2, it is characterized in that: the cross section of described pressure-bearing type cylindrical shell is Long Circle, and described driving shaft axle center is positioned at the following round center of described cylindrical shell.

5. according to the novel disk reactor described in claim 1 or 2, it is characterized in that: described reactor shell inside is being fixed with a plurality of circular hole dishes near on the driving shaft at material inlet place.