CN108201705A - A kind of scraped film type short-path distillation initial charge device - Google Patents

Abstract

The invention discloses a scraping film type short-distance distillation initial feeding device, which comprises a supporting flange, a fixed retaining ring, a rib plate, and a feeding funnel; the supporting flange is provided with bolt holes and sealing grooves, and the bottom surface of the supporting flange is welded. There is a fixed retaining ring, and three identical ribs are welded on the bottom circumference of the fixed retaining ring, and the interval angle between two adjacent ribs is 120°; the bottom end of the ribs is welded to the upper edge of the feeding funnel to realize Fixed support for the feed funnel. When the feeding device is put into the molecular still, the feeding funnel is inserted into the rotating shaft through the circular feeding hole in the middle, and the outer wall surface of the fixed retaining ring is close to the inner wall surface of the evaporation cylinder, so that the feeding device can direction constraints; the supporting flange is located between the two flanges at the upper end of the evaporation cylinder, and is airtightly connected with the cylinder through bolts and sealing rings. The invention has simple structure and reasonable design, realizes central feeding, avoids uneven cloth distribution and partial liquid accumulation, and is beneficial to improving the uniformity of the initial liquid film.

Description

A scraped-film short-path distillation initial feeding device

technical field

The invention relates to the field of short-path distillation, in particular to a wiped-film type short-path distillation initial feeding device.

Background technique

Short-path distillation, also known as molecular distillation, is a high-efficiency separation technology under high vacuum. It has the advantages of short residence time of materials, low operating temperature, high degree of separation, and clean and environmentally friendly process. It is especially suitable for enrichment or purification of high boiling point and high viscosity. Or heat-sensitive organic compounds, widely used in chemical, food and pharmaceutical fields.

With the continuous improvement of people's quality requirements for food, cosmetics and other products, the role of short-path distillation has become increasingly prominent. The short-path still is the main equipment of the short-path distillation technology. The liquid material is initially distributed from the distributor to the evaporation wall to form an initial liquid film; the way the liquid material flows into the distributor will directly affect the uniformity of the initial liquid film, and then affect the separation efficiency of the equipment. , so the feed device is an important part of the short path still.

The existing scraping-film short-distance distillation feed device is that the feed pipe has a feed port on one side of the distiller, the feed pipe extends from the feed port, and the end is placed above the distributor, and the material flows into Distributor. This feeding method easily leads to uneven distribution of liquid in the distributor, resulting in local accumulation of liquid, which is not conducive to the formation of a uniform initial liquid film, and reduces the separation efficiency and product quality of the equipment.

Contents of the invention

In order to overcome the above-mentioned defects, the technical problem to be solved by the present invention is to provide a wiped-film short-path distillation initial feeding device, which has a simple structure and a reasonable design. An initial feeding device is added above the distributor of the original device. First, the liquid material flows into the feeding funnel from the feeding pipe, and then flows into the distributor from the annular gap between the feeding funnel and the rotating shaft to realize central feeding, thus effectively ensuring The uniformity of the cloth improves the distillation efficiency.

In order to solve the technical problem, the technical measures adopted by the present invention are: a scraped-film type short-path distillation initial feeding device, including a support flange, a fixed retaining ring, a rib plate, and a feed funnel; further, on the above-mentioned support flange There are bolt holes, and sealing grooves are opened on the upper and lower ends of the surface;

Further, the bottom surface of the support flange is welded with a fixed stop ring, and the inner wall surface of the fixed stop ring and the inner wall surface of the support flange are on the same circumferential surface;

Further, 3 identical ribs are welded on the circumference of the bottom surface of the above-mentioned fixed retaining ring, the interval angle between two adjacent ribs is 120°, and the bottom end of the ribs is welded to the upper edge of the feeding funnel, which can realize the Fixed support for the feed funnel;

Further, the outer wall surface of the above-mentioned fixed retaining ring is close to the inner wall surface of the evaporation cylinder. When the feeding device is installed in the molecular still, the feeding funnel is inserted into the rotating shaft through the circular feeding hole in the middle, so that the feeding The feeding device can be radially constrained to ensure the stability and assembly accuracy of the feeding device;

Further, the above-mentioned feeding funnel is installed concentrically with the rotating shaft to ensure that the vertical axes of the two coincide, and a uniform circular gap is formed between the feeding hole and the rotating shaft;

Furthermore, the above-mentioned supporting flange is located between the two flanges at the upper end of the evaporation cylinder, and is airtightly connected with the cylinder through bolts and sealing rings.

Compared with the existing technology, the advantages of the present invention are: with the feeding of the feeding pipe, the liquid material falls on the inner cone surface of the funnel of the feeding device, and flows into the distributor through the annular gap between the feeding funnel and the rotating shaft , realize the center feeding, avoid the phenomenon of uneven distribution and local liquid accumulation, and help to improve the uniformity of the initial liquid film.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings that are required in the description of the embodiments or the prior art.

Fig. 1 is a structural assembly drawing of the present invention;

Fig. 2 is a top view of the structure of the present invention;

Fig. 3 is a positive triaxial view of the feeding device;

Fig. 4 is a half-sectional view of the feeding device;

1. Distributor 2. Feeding device 2-1, Feeding funnel 2-2, Support flange 2-3, Upper sealing groove

2-4, fixed retaining ring 2-5, bolt hole 2-6, rib plate 2-7, lower sealing groove 3, feed inlet

4. Upper flange 5. Lower flange 6. Rotary shaft

Detailed ways

1. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. As shown in Fig. 3 and Fig. 4, the present invention provides a scraped-film type short-path distillation initial feeding device, which includes a feeding funnel 2-1, a supporting flange 2-2, a fixed retaining ring 2-4 and a rib plate 2- 6. As shown in Figure 1 and Figure 4, there are bolt holes 2-5 on the supporting flange 2-2, and upper sealing grooves 2-3 and lower sealing grooves 2-7 are respectively formed on the upper and lower ends of the supporting flange; The bottom surface of -2 is welded with fixed retaining ring 2-4, and the inwall surface of fixed retaining ring 2-4 and the inner wall surface of support flange 2-2 are on the same circumference; The bottom surface circumference of fixed retaining ring 2-4 is welded with 3 identical ribs 2-6, the interval angle between two adjacent ribs is 120°; the bottom of the ribs 2-6 is welded to the upper edge of the feed funnel 2-1 to realize the feed funnel Fixed support; when the feeding device 2 is installed in the molecular still, the feeding funnel 2-1 is inserted into the rotating shaft 6 through the circular feeding hole in the middle, and the outer wall surface of the fixed retaining ring 2-4 is close to the evaporation cylinder The inner wall surface of the feed device 2 can be radially constrained to ensure the stability and assembly accuracy of the feed device 2; the feed funnel 2-1 is installed concentrically with the rotating shaft 6 to ensure that the vertical axes of the two coincide. A uniform annular gap is formed between the feed hole and the rotating shaft 6; the supporting flange 2-2 is located between the upper flange 4 and the lower flange 5 at the upper end of the evaporation cylinder, through the bolt hole 2-5, the upper sealing groove 2-3 is airtightly connected with the lower sealing groove 2-7 and the cylinder body.

When the equipment is in operation, the liquid material flows from the feed port 3 from the gap between the support flange 2-2 and the feed funnel 2-1 to the inner conical surface of the feed funnel 2-1. The initial distribution of the material is carried out inside, and then flows into the distributor 1 through the annular gap between the feed funnel 2-2 and the rotating shaft 6, and the material is redistributed in the distributor 1. With the rotation of the distributor, the liquid material is evenly distributed to the wall of the evaporation cylinder. Since the upper edge of the feed funnel 2-1 is rounded, and the diameter of the upper edge of the feed funnel 2-1 is smaller than the diameter of the distributor 1, when the feed is too much, the liquid material can flow from the feed funnel 2-1 along the rounding. The outer wall of 1 flows into the distributor 1 to prevent the liquid material from vertically falling into the distributor 1 from the upper edge of the feed funnel 2-1 and splashing. The invention realizes the central feeding, avoids the phenomenon of uneven cloth distribution and partial liquid accumulation, and is beneficial to improve the yield of products.

Claims (6)

1. The invention discloses an initial feeding device for scraped-film short-path distillation, which includes a support flange, a fixed retaining ring, ribs, and a feed funnel; bolt holes are opened on the support flange, and the upper and lower ends of the device are All have sealing grooves. 2. A scraped-film type short-path distillation initial feeding device according to claim 1, characterized in that: the bottom surface of the support flange is welded with a fixed retaining ring, and the inner wall surface of the fixed retaining ring is connected to the inner surface of the supporting flange. The walls are on the same circumference. 3. A wiped-film type short-path distillation initial feeding device according to claim 1 or 2, characterized in that: three identical ribs are welded on the circumference of the bottom surface of the fixed retaining ring, and two adjacent ribs The interval angle between them is 120°; the bottom end of the rib plate is welded to the upper edge of the feed funnel to realize the fixed support for the feed funnel. 4. A kind of wiped-film type short-path distillation initial feeding device according to claim 1 or 2, is characterized in that: when this feeding device is packed in molecular still, feeding funnel passes through the circular feed in the middle The hole is inserted into the rotating shaft, and the outer wall surface of the fixed retaining ring is close to the inner wall surface of the evaporation cylinder, so that the feeding device can be radially restrained, and the stability and assembly accuracy of the feeding device can be guaranteed. 5. A scraped-film type short-path distillation initial feeding device according to claim 4, characterized in that: said feeding funnel is installed concentrically with the rotating shaft to ensure that the vertical axes of the two coincide, and the feeding hole and A uniform circular gap is formed between the rotating shafts. 6. A wiped-film type short-path distillation initial feeding device according to claim 1, characterized in that: the support flange is located between the two flanges at the upper end of the evaporation cylinder, and is connected to the cylinder through bolts and sealing rings. Airtight connection.