CN220125712U - System for separating crystals - Google Patents

Abstract

The utility model discloses a system for separating crystals, which comprises: the centrifugal device, the candle filter and the cartridge filter have high automation degree, save the manpower consumption, improve the recovery rate and simultaneously reduce the cost.

Description

System for separating crystals

Technical Field

The utility model belongs to the field of solid-liquid separation, and particularly relates to a system for separating crystals from crystal slurry, in particular to an amino acid crystal separation system.

Background

The separation of crystals from the crystal mush is an important link in the extraction process of biological fermentation engineering and is a process technology which is often used. In the production of amino acids, efficient recovery of amino acid crystals from amino acid crystal slurries is an important step in the production of amino acids. On one hand, the crystals are effectively recycled, so that the separation efficiency can be improved; on the other hand, the crystals are sufficiently recovered, and the processing pressure in the next step can be reduced.

At present, the recovery of crystals during the production of amino acids mainly adopts a centrifugal separation mode, and the crystals are trapped by utilizing centrifugal force. The general amino acid crystal collection mode is as follows: and conveying the treated fermentation liquor to an evaporator, conveying crystal slurry obtained by the evaporator to a centrifugal machine through a pipeline, centrifuging to obtain amino acid crystals, and finally conveying the amino acid crystals to a storage bin for packaging. However, the treatment method can separate out some crystals together with the mother liquor under the action of centrifugal force, so that the recovery rate of the crystals is not high, and the problems of pipeline blockage and the like caused by excessive crystal deposition are solved. In addition, excessive crystals in the mother solution can cause excessive pressure to the security filter element, and the security filter element needs to be shut down for replacement, so that the recovery efficiency of the crystals is greatly affected.

Aiming at the problems that the recovery of crystals is low, the crystals doped in the mother solution cannot be effectively recovered, and the yield is low and the cost is high. The utility model solves the problems by providing an efficient and stable crystal separation system through reasonable design.

Disclosure of Invention

The present utility model aims to address the shortcomings and drawbacks of the prior art by providing an efficient, stable crystal separation system. It adopts centrifugal separation combined with candle filter to separate crystal.

In order to achieve the above purpose, the present utility model provides the following technical solutions: conveying the treated fermentation liquor to an evaporator, conveying crystal slurry obtained by the evaporator to a circulating cooling system through a pipeline for crystallization, and separating out crystals in the crystal slurry again; and then sending the cooled crystal slurry to a centrifugal device, sending the crystals obtained by preliminary centrifugation to a drying package, collecting mother liquor again through a candle filter, sending the obtained crystals to the drying package, and recycling residual crystals after filtrate passes through a security filter. The filter liquor of the candle filter finally fully recovers crystals through the cartridge filter, and the cartridge filter can intercept particles with the size of 0.01 mu m or more, so that the mother liquor is more convenient to treat, and the recovery rate is greatly improved.

Suspension centrifuge: the centrifugal machine is an advanced intermittent gravity, mechanical or manual discharging centrifugal machine, and the centrifugal machine has the advantages of advanced design, reasonable structure, stable operation, simple and convenient operation, high production efficiency, large processing capacity and extremely small maintenance amount; the disadvantage is that the whole machine is high and requires a high installation height.

Candle filter: the candle filter is a novel advanced, safe, efficient and pollution-free filtering mode, and has the characteristics of high efficiency, energy conservation, high sealing, high precision, simple and convenient maintenance, safety, reliability, higher automation degree and the like; the working principle is as follows: a cylinder body of the filter is internally provided with 1 to a plurality of filter elements, the filter elements are sleeved with special filter cloth (filter aid such as active carbon, diatomite and the like are added into certain special raw material liquid) selected according to the characteristics of the raw material liquid, when the liquid passes through the filter cloth, solid matters in the liquid can be gradually accumulated on the surface of the filter cloth, and when the solid matters reach a certain thickness, a so-called filter cake layer is formed, so that solid-liquid separation is carried out.

A system for separating crystals, comprising: the crystal slurry is subjected to primary solid-liquid separation through the centrifugal device, the obtained crystallization mother liquor enters the candle filter for solid-liquid separation, and the obtained filtrate enters the cartridge filter for tertiary solid-liquid separation.

Preferably, the wet material is sent to the drying package from the discharge port after the first solid-liquid separation.

Preferably, the "cake" from the candle filter is sent through a discharge port to a dry package.

Preferably, the crystallization mother liquor obtained by the centrifugal device is introduced into a first collection tank, and the filtrate obtained by the candle filter is introduced into a second collection tank.

Preferably, the centrifuge device is a centrifuge, more preferably a tripodia centrifuge.

The cartridge filter is a variety of precision filtration devices capable of trapping materials of 0.01 μm and above.

The utility model has the beneficial effects that: the yield of about 75% of the conventional method is improved to about 95%; the automatic filter bag cleaning machine has the advantages of high automation degree, labor consumption saving, treatment pressure reduction of the subsequent process, no need of frequent replacement and cleaning of the filter bag, only need of replacement once at intervals, improvement of recovery rate and reduction of cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is: and (3) crystallizing and separating the fermentation liquor.

Fig. 2 is: the crystal separation system of the utility model and the application thereof in the extraction of amino acid crystals are shown in the box part.

Reference numerals illustrate: stock solution jar 1, circulation cooling system 2, centrifugal device 3, first collection tank 4, candle filter 5, second collection tank 6, cartridge filter 7, recovery jar 8, first pump body 9, second pump body 10, third pump body 11, fourth pump body 12, centrifugal discharge gate 301, candle discharge gate 501.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. The utility model will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

The utility model will be further described with reference to the accompanying drawings

An efficient crystalline separation system: the magma passes through centrifugal device 3, and wet material is separated from centrifugal discharge gate 301 after preliminary solid-liquid separation, and is sent to dry package, and centrifugal mother liquor is introduced into first collecting tank 4. Pumping the centrifugal mother liquor into a candle filter 5 for solid-liquid separation, separating the filtered crystals through a candle discharge hole 501, sending the crystals to a drying package, and flowing the filtrate from the upper part of the candle filter 5 into a second collecting tank 6 through a pipeline; the mother liquor of the candle filter is pumped into the cartridge filter 7 by a fourth pump body 12, the residual crystals in the filtrate of the candle filter are recovered, and finally the filtrate after the cartridge filter is sent into a recovery tank 8 for collecting the mother liquor.

For the crystallization extraction of amino acid after fermentation broth is put down in a tank, the high-efficiency crystallization separation system can efficiently recover crystals from crystal mush, and specifically: the processed fermentation liquor is conveyed to an MVR evaporator through a pipeline for evaporation and concentration, the concentrated crystal slurry is conveyed to a raw liquor tank 1, the crystal slurry is pumped into a circulating cooling system 2 through a first pump body 9, the crystal slurry is cooled again to separate out crystals, the cooled crystal slurry is conveyed to a centrifugal device 3, wet materials are separated from a centrifugal discharge port 301 after preliminary solid-liquid separation, the wet materials are conveyed to a drying package, and centrifugal mother liquor is pumped into a first collecting tank 4 through a second pump body 10; pumping the centrifugal mother liquor into a candle filter 5 by using a third pump body 11 for secondary solid-liquid separation, separating separated crystals through a candle discharge hole 501, sending the separated crystals to a drying package, and flowing filtrate from the upper part of the candle filter into a second collection tank 6 through a pipeline after the filtration of the candle filter; the filtrate filtered by the candle filter is pumped into the cartridge filter 7 by the fourth pump body 12, the residual crystals therein are recovered again, and finally the filtrate filtered by the cartridge filter is sent to the recovery tank 8 for collection.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (8)

1. A system for separating crystals, comprising: the crystal slurry is subjected to primary solid-liquid separation through the centrifugal device (3), the obtained crystal mother liquor enters the candle filter (5) for solid-liquid separation, and the obtained filtrate enters the cartridge filter (7) for tertiary solid-liquid separation.

2. The system for separating crystals according to claim 1, characterized in that the bottom of the centrifugal device (3) is provided with a centrifugal discharge opening (301).

3. The system for separating crystals according to claim 2, characterized in that the bottom of the candle filter (5) is provided with a candle discharge opening (501).

4. A system for separating crystals according to claim 3, characterized in that the crystallization mother liquor outlet of the centrifuge device (3) is connected to a first collection tank (4), the filtrate outlet of the candle filter (5) is connected to a second collection tank (6), and the second collection tank (6) is in communication with a cartridge filter (7).

5. System for separating crystals according to claim 1, characterized in that the centrifuge device (3) is a centrifuge.

6. The system for separating crystals according to claim 5, characterized in that the centrifugal device (3) is a tripodia centrifuge.

7. The system for separating crystals according to claim 4, further comprising: a raw liquid tank (1), a circulating cooling system (2) and a recovery tank (8); the raw liquid tank (1), the circulating cooling system (2) and the centrifugal device (3) are sequentially communicated, and the recovery tank (8) is communicated with a filtrate outlet of the cartridge filter (7).

8. The system for separating crystals according to claim 7, characterized in that a first pump body (9) is arranged on a pipeline between the raw liquid tank (1) and the circulating cooling system (2), a second pump body (10) is arranged on a pipeline between the centrifugal device (3) and the first collecting tank (4), a third pump body (11) is arranged on a pipeline between the first collecting tank (4) and the candle filter (5), and a fourth pump body (12) is arranged on a pipeline between the second collecting tank (6) and the cartridge filter (7).