CN202715268U

CN202715268U - Crystallizer

Info

Publication number: CN202715268U
Application number: CN 201220408760
Authority: CN
Inventors: 穆世鑫
Original assignee: CHONGQING SITAIKE MATERIAL TECHNOLOGY Co Ltd
Current assignee: Chongqing Star-Tech & Jrs Specialty Products Co ltd
Priority date: 2012-08-17
Filing date: 2012-08-17
Publication date: 2013-02-06
Anticipated expiration: 2022-08-17

Abstract

The utility model discloses a crystallizer which comprises a cylinder body, and an upper pipe plate and a lower pipe plate are respectively welded at the upper end and the lower end of the cylinder body. An upper short section is welded on the upper portion of the upper pipe plate. A cloth plate with a plurality of holes is arranged in the upper short section. An upper sealing head is arranged on the upper portion of the upper short section. A material inlet is arranged on the upper sealing head. A lower short section is welded on the lower portion of the lower pipe plate. A lower sealing head is arranged on the lower portion of the lower short section. A material outlet is arranged on the lower sealing head. A plurality of crystallizing pipes are arranged between the upper pipe plate and the lower pipe plate. The crystallizing pipes are communicated with the upper short section and the lower short section. A water inlet is arranged on the lower portion of the cylinder body, and a water outlet is arranged on the upper portion of the cylinder body. The crystallizer is simple in structure, simple in operation, low in energy consumption, and capable of improving purity of N Vinyl Pyrrolidinone (NVP) to 99.995%. Meanwhile, refining rate reaches more than 98%.

Description

Crystallizer

Technical field

The utility model relates to a kind of crystallizer, particularly relates to a kind of crystallizer for refining NVP (NVP).

Background technology

Polyvinylpyrrolidone (PVP) is excellent performance, broad-spectrum water-soluble high-molecular compound, is important chemical intermediate and the medicine intermediate that advocate the world.Pharmaceutical grade PVP(PVP) pharmaceutically be widely used, one of three large medicinal new accessories of advocating for the world, most widely used is the adhesive of tablet, granule.PVP also can be used as the glidant of capsule, the detoxicant of medicament for the eyes and lubricant, the cosolvent of injection, the dispersant of liquid preparation, the stabilizing agent of enzyme and temperature-sensitive medicine etc.

In the production of PVP series of products, stable for the inherent quality that guarantees product and smell color must further be made with extra care starting monomer NVP, and its content is promoted to 99.995% from 99.5%.In prior art, usually adopt the mode of segmentation rectifying that NVP is made with extra care, but because the boiling point of NVP more than 180 ℃, rectifying is consumed energy very much, and once investment is larger, the bad grasp of technology.

Therefore those skilled in the art are devoted to develop the NVP purification apparatus that a kind of refining effect is good, energy consumption is low, simple to operate.

The utility model content

Because the defects of prior art, technical problem to be solved in the utility model is to provide the NVP purification apparatus that a kind of refining effect is good, energy consumption is low, simple to operate.

For achieving the above object, the utility model provides a kind of crystallizer, comprises cylindrical shell; The two ends up and down of described cylindrical shell are welded with respectively upper perforated plate and lower perforated plate; The top of described upper perforated plate is welded with pipe nipple; Be provided with the drapery panel of porous in described upper pipe nipple; The top of described upper pipe nipple is provided with upper cover; Be provided with charging aperture on described upper cover; The bottom of described lower perforated plate is welded with lower pipe nipple; The bottom of described lower pipe nipple is provided with low head; Be provided with discharging opening on described low head; Be provided with some crystallizers between described upper perforated plate and lower perforated plate; Described crystallizer is communicated with described upper pipe nipple and lower pipe nipple; Bottom at described cylindrical shell is provided with water inlet, and top sets out the mouth of a river.

For material is flowed in crystallizer more uniformly, the upper end of described crystallizer passes described upper perforated plate.

Better, the upper surface of described crystallizer is higher than described upper perforated plate 2cm.

For further improving the purity of NVP, the lowest part of described upper pipe nipple is provided with drain.

For material is flowed in crystallizer more uniformly, the upper surface of described drapery panel and described charging aperture be provided with striker plate over against the position.

For improving heat exchange efficiency, described water inlet and delivery port are oppositely arranged.

For ease of the installation of crystallizer, be provided with bearing on the excircle of described cylindrical shell.

For further improving heat exchange efficiency, on the inherent short transverse of described cylindrical shell, the interval has shifted to install a plurality of deflection plates; Described deflection plate is divided into tortuous flow channel for liquids with the inner chamber of described cylindrical shell; In described lower perforated plate, the interval is fixed with pull bar; Described deflection plate is sleeved on described pull bar; Locate by the distance sink tube that is sleeved on described pull bar between adjacent deflection plate; The top of each described pull bar is provided with locking nut.

The beneficial effects of the utility model are: the utility model is simple in structure, simple to operate, energy consumption is low, and can make the purity of NVP bring up to 99.995%, and refining yield reaches more than 98%.

Description of drawings

Fig. 1 is the structural representation of the utility model one specific embodiment.

Fig. 2 is the plan structure schematic diagram of Fig. 1.

Fig. 3 is the partial enlarged drawing at I place in Fig. 1.

Fig. 4 is the partial enlarged drawing at II place in Fig. 1.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figures 1 to 4, a kind of crystallizer comprises cylindrical shell 1, and the two ends up and down of cylindrical shell 1 are welded with respectively upper perforated plate 2 and lower perforated plate 3, uniformly on the excircle of cylindrical shell 1 is provided with 4 bearings 20.

The top of upper perforated plate 2 is welded with pipe nipple 5, is provided with the drapery panel 13 of porous in upper pipe nipple 5.The top of upper pipe nipple 5 is provided with upper cover 6, is provided with charging aperture 7 on upper cover 6.

In the present embodiment, the upper surface of drapery panel 13 and charging aperture 7 be provided with striker plate 14 over against the position, so the NVP material that enters in charging aperture 7 can avoid its major part directly enter with charging aperture 7 over against aperture in, thereby make material evenly flow into lower floor.

The bottom of lower perforated plate 3 is welded with lower pipe nipple 8, and the bottom of lower pipe nipple 8 is provided with low head 9, is provided with discharging opening 10 on low head 9.

Be provided with 600 crystallizers 4 between upper perforated plate 2 and lower perforated plate 3, crystallizer 4 is communicated with upper pipe nipple 5 and lower pipe nipple 8.

In the present embodiment, the upper end of crystallizer 4 passes upper perforated plate 2, and the upper surface of crystallizer 4 is higher than upper perforated plate 2mm, thereby forms cofferdam structure.The lowest part of upper pipe nipple 5 is provided with drain 15.Therefore, when only having liquid in the cofferdam higher than 2cm, material just can enter in crystallizer 4, thereby the material that enters in each crystallizer 4 is more evenly distributed.

In the present embodiment, be provided with water inlet 11 in the bottom of cylindrical shell 1, top sets out the mouth of a river 12, and water inlet 11 and delivery port 12 are oppositely arranged.On the inherent short transverse of cylindrical shell 1, the interval has shifted to install 8 deflection plates 17, and deflection plate 17 is divided into tortuous flow channel for liquids with the inner chamber of cylindrical shell 1.The interior interval of lower perforated plate 1 is fixed with pull bar 16, and deflection plate 17 is sleeved on pull bar 16.Between adjacent deflection plate 17, by being sleeved on distance sink tube 18 location on pull bar 16, the top of each pull bar 16 is provided with locking nut 19.Therefore, can extend the interior chilled water of cylindrical shell 1 or the circulation path of hot water, improve heat exchange efficiency.

Crystallizer is when operation, pass into the cryogenic freezing water of temperature constant in 1 from water inlet 11 to cylindrical shell, with pump, NVP is sent in upper pipe nipple 5 from charging aperture 7, then enter crystallizer 4 through drapery panel 13, so the NVP material forms film in crystallizer 4 and crystallisation by cooling is separated out, when crystallization reaches constant weight, remove the interior residual liquid of crystallizer 4, and remove by only putting mouth 15 residual liquid of piling up on upper perforated plate 3, then bleed off the chilled water in cylindrical shell 1, pass into hot water, with the heating material fusing of crystallization, collect in container.Due to the material that contains impurity, its fusing point is lower than the fusing point of sterling, therefore can obtain by accurate control fusing point the product of a purifying.The product of a purifying is repeated above step, can obtain content in 99.995% sterling by continuous several times frozen recrystallization.The residual liquid of frozen recrystallization is last time reclaimed circulation refining, the yield of NVP is reached more than 98%.

More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all technical staff in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.

Claims

1. a crystallizer, is characterized in that: comprise cylindrical shell (1); The two ends up and down of described cylindrical shell (1) are welded with respectively upper perforated plate (2) and lower perforated plate (3);

The top of described upper perforated plate (2) is welded with pipe nipple (5); Be provided with the drapery panel (13) of porous in described upper pipe nipple (5); The top of described upper pipe nipple (5) is provided with upper cover (6); Be provided with charging aperture (7) on described upper cover (6);

The bottom of described lower perforated plate (3) is welded with lower pipe nipple (8); The bottom of described lower pipe nipple (8) is provided with low head (9); Be provided with discharging opening (10) on described low head (9);

Be provided with some crystallizers (4) between described upper perforated plate (2) and lower perforated plate (3); Described crystallizer (4) is communicated with described upper pipe nipple (5) and lower pipe nipple (8);

Be provided with water inlet (11) in the bottom of described cylindrical shell (1), top sets out the mouth of a river (12).

2. crystallizer as claimed in claim 1, it is characterized in that: the upper end of described crystallizer (4) passes described upper perforated plate (2).

3. crystallizer as claimed in claim 2, it is characterized in that: the upper surface of described crystallizer (4) is higher than described upper perforated plate (2) 2cm.

4. crystallizer as claimed in claim 2 or claim 3, it is characterized in that: the lowest part of described upper pipe nipple (5) is provided with drain (15).

5. crystallizer as claimed in claim 1 is characterized in that: the upper surface of described drapery panel (13) and described charging aperture (7) be provided with striker plate (14) over against the position.

6. crystallizer as claimed in claim 1, it is characterized in that: described water inlet (11) and delivery port (12) are oppositely arranged.

7. crystallizer as claimed in claim 1, is characterized in that: be provided with bearing (20) on the excircle on described cylindrical shell (1).

8. as claim 1,2,3,5,6 or 7 arbitrary described crystallizers, it is characterized in that: on the inherent short transverse of described cylindrical shell (1), the interval has shifted to install a plurality of deflection plates (17); Described deflection plate (17) is divided into tortuous flow channel for liquids with the inner chamber of described cylindrical shell (1);

The interior interval of described lower perforated plate (1) is fixed with pull bar (16); Described deflection plate (17) is sleeved on described pull bar (16); Locate by the distance sink tube (18) that is sleeved on described pull bar (16) between adjacent deflection plate (17); The top of each described pull bar (16) is provided with locking nut (19).