CN215026148U - Continuous crystallization device with high crystallization speed - Google Patents

Abstract

The utility model discloses a continuous crystallization device with high crystallization speed, which comprises a first-stage crystallization kettle, a second-stage crystallization kettle and a third-stage crystallization kettle, wherein the first-stage crystallization kettle, the second-stage crystallization kettle and the third-stage crystallization kettle are sequentially communicated through a pipeline, the arrangement heights of the first-stage crystallization kettle, the second-stage crystallization kettle and the third-stage crystallization kettle are sequentially reduced, stirring mechanisms are respectively arranged in the first-stage crystallization kettle, the second-stage crystallization kettle and the third-stage crystallization kettle, a circulating cooling water bath layer is arranged outside the first-stage crystallization kettle, and a cooling water supply port and a cooling water outlet are arranged on the circulating cooling water bath layer; a freezing water bath layer is arranged outside the secondary crystallization kettle, and a freezing water supply port and a freezing water outlet are arranged on the freezing water bath layer; a frozen brine bath layer is arranged outside the third-stage cleaning kettle, and a brine water supply port and a brine water outlet are arranged on the frozen brine bath layer; the one-level crystallization kettle is communicated with a feeding pipeline, the three-level clean kettle is communicated with a discharging pipeline, and the discharging pipeline is communicated with a centrifuge. The utility model has the advantages of improve material vortex efficiency, improve crystallization efficiency.

Description

Continuous crystallization device with high crystallization speed

Technical Field

The application relates to the technical field of connection crystallization, in particular to a continuous crystallization device with high crystallization speed.

Background

With the increasing requirements of the market on the granularity, the purity and other problems of the crystallized products, the industrial crystallization technology needs in the industries of petrochemical industry, coal chemical industry, medicine, environmental protection, fine chemical industry, pesticide, chemical fertilizer and the like are more and more urgent. The crystallization technology is an important operation unit and is a key technology for realizing resource utilization and reduction of waste. The environmental protection pressure is forced to upgrade the discharge standards of various petrochemical industries, and even the industrial wastewater zero discharge technology is implemented. In the wastewater treatment, the completion of energy conservation and emission reduction tasks in the petrochemical industry is directly influenced by the crystallization energy consumption and the operation level, the technology is improved at the process source, and the case of realizing zero discharge of wastewater is industrialized.

The crystallization process utilizes the difference of solubility of each component in the mixture in the same solvent or the obvious difference of solubility in cold and hot conditions, and adopts a crystallization method for separation. At present, the industrial crystallization is generally performed by a one-pot method, namely, materials are added into a crystallization kettle at one time, and a cooling medium is continuously introduced into a jacket. Slow cooling, long standing time, slow crystallization speed and huge energy consumption.

In the chinese patent literature, the patent number CN 2020215874184 discloses a crystallization tank for producing traditional Chinese medicine at 2021, 4/2, which is named as a "crystallization tank for producing traditional Chinese medicine", the application discloses a crystallization tank for producing traditional Chinese medicine, comprising a crystallization tank body, a housing fixedly connected with the crystallization tank body is arranged at the outer side of the crystallization tank body, a first pipeline and a second pipeline communicated with a cavity are arranged at the outer side of the housing, a cooler is connected and arranged at the other end of the first pipeline and the other end of the second pipeline, the first pipeline is arranged at the top of the housing, the second pipeline is arranged at the bottom of the housing, a liquid pump is connected and arranged on the first pipeline, a speed reducing motor and a feed pipe are arranged at the top of the crystallization tank body, a stirring shaft is connected and arranged at the inner part of the speed reducing motor, the output end of the speed reducing motor extends into the crystallization tank body, a plurality of stirring rods are connected and arranged on the stirring shaft, a scraper is connected and arranged at one end of the stirring rod far from the stirring shaft, the bottom of crystallizer body is equipped with the discharging pipe. The disadvantages are that: 1. the one-time crystallization is slow, the standing time is long, and the crystallization speed is slow; 2. the stirring rod only has one-way turbulence capacity, and the turbulence effect is relatively poor, influences crystallization efficiency.

Disclosure of Invention

In order to overcome the defects in the prior art, the application provides the connection crystallizing device which has high production efficiency, high capacity and high product qualification rate by adopting continuous crystallization; the automation and the continuity are realized.

The utility model discloses a another purpose is, improves material vortex efficiency, improves crystallization efficiency.

In order to achieve the above purpose, the present invention adopts the following technical solution.

A continuous crystallization device with high crystallization speed is characterized by comprising a primary crystallization kettle, a secondary crystallization kettle and a tertiary crystallization kettle, wherein the primary crystallization kettle, the secondary crystallization kettle and the tertiary crystallization kettle are sequentially communicated through pipelines, the arrangement heights of the primary crystallization kettle, the secondary crystallization kettle and the tertiary crystallization kettle are sequentially reduced, stirring mechanisms are respectively arranged in the primary crystallization kettle, the secondary crystallization kettle and the tertiary crystallization kettle, a circulating cooling water bath layer is arranged outside the primary crystallization kettle, and a cooling water supply port and a cooling water outlet are arranged on the circulating cooling water bath layer; a freezing water bath layer is arranged outside the secondary crystallization kettle, and a freezing water supply port and a freezing water outlet are arranged on the freezing water bath layer; a frozen brine bath layer is arranged outside the third-stage cleaning kettle, and a brine water supply port and a brine water outlet are arranged on the frozen brine bath layer; the one-level crystallization kettle is communicated with a feeding pipeline, the three-level clean kettle is communicated with a discharging pipeline, and the discharging pipeline is communicated with a centrifuge.

Circulating water at the temperature of 32-37 ℃ is adopted in the circulating cooling water bath layer, low-temperature water at the temperature of 7-12 ℃ is adopted in the freezing water bath layer, freezing saline water at the temperature of-10 to-15 ℃ is adopted in the freezing saline water bath layer, and the materials form a three-stage temperature gradient in a three-stage crystallization kettle and are cooled step by step; the temperature change is controllable, and the crystal form is uniform; the continuous crystallization has high production efficiency, high capacity and high product qualification rate; the automation and the continuity are realized.

Preferably, the stirring mechanism comprises a stirring motor and a stirring paddle, the stirring paddle comprises a stirring shaft and a paddle positioned on the stirring shaft, the stirring shaft is connected with the stirring motor, a sliding sleeve is arranged on the stirring shaft in a sliding mode, and a shunting paddle arranged along the axis of the sliding sleeve is arranged on the sliding sleeve. Through agitator motor drive stirring rake, realize cutting the vortex, and the setting of reposition of redundant personnel oar can be accomplished and carry along the axial material of (mixing) shaft, realizes more even abundant vortex, prevents to pile up the crystallization micrite on the stirring leaf, guarantees rabbling mechanism's reliability.

Preferably, the circulating cooling water bath layer, the freezing water bath layer and the freezing brine bath layer are arranged in a jacket mode. The reliable water bath temperature control effect is provided through the jacket structure, and the crystallization efficiency is ensured.

Preferably, the stirring shaft is provided with an invagination ring groove, the sliding sleeve is sleeved on the invagination ring groove, and the length of the sliding sleeve is smaller than the groove width of the invagination ring groove. The sliding sleeve is restrained by the arrangement of the inward recessed ring groove, and the stroke of the sliding sleeve is conveniently controlled.

Preferably, the sunken ring groove is located the intermediate position of (mixing) shaft, and the both ends of (mixing) shaft are equipped with two sets of paddles respectively, and the two sets of paddles of the same end of (mixing) shaft set up at interval. And the two groups of blades synchronously disturb flow, so that the stirring and crystallization efficiency is improved.

Preferably, the length of the sliding sleeve is half the width of the undercut groove. The sliding sleeve slides in the sunken ring groove, and the sliding stroke is twice of the length of the sliding sleeve, so that the structural strength of the stirring shaft at the sunken ring groove is ensured.

Preferably, the splitter blade is a helical blade fixed to the outside of the sliding sleeve. Has the conveying function similar to that of a conveying auger, and is matched with the blades at two ends of the stirring shaft to improve the stirring efficiency.

The utility model discloses following beneficial effect has: forming a three-stage temperature gradient and gradually cooling the material in a three-stage crystallization kettle; the temperature change is controllable, and the crystal form is uniform; the continuous crystallization has high production efficiency, high capacity and high product qualification rate; the automation and the continuity are realized; the stirring efficiency is high, and the crystallization efficiency is high.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the stirring paddle in the utility model.

In the figure: a stirring paddle 4 of a first-stage crystallization kettle 1, a second-stage crystallization kettle 2, a third-stage crystallization kettle 3, a stirring paddle 4, a stirring shaft 6, a paddle 7, a sliding sleeve 8, a shunting paddle 9, an inner sunken ring groove 10, a centrifuge 11, a circulating cooling water bath layer 12, a cooling water supply port 13, a cooling water outlet 14, a freezing water bath layer 15, a freezing water supply port 16, a freezing brine bath layer 17, a brine water supply port 18, a brine water supply port 19, a brine water outlet 20, a feeding pipeline 21 and a discharging pipeline 22.

Detailed Description

The invention is further illustrated with reference to the accompanying drawings and specific embodiments.

In the embodiment of the method, the first step,

as shown in fig. 1 and 2, a continuous crystallization device with a fast crystallization speed is characterized by comprising a first-stage crystallization kettle 1, a second-stage crystallization kettle 2 and a third-stage crystallization kettle 3, wherein the first-stage crystallization kettle 1, the second-stage crystallization kettle 2 and the third-stage crystallization kettle 3 are sequentially communicated through a pipeline, and the heights of the first-stage crystallization kettle 1, the second-stage crystallization kettle 2 and the third-stage crystallization kettle 3 are sequentially reduced. All be equipped with rabbling mechanism in one-level crystallization kettle 1, second grade crystallization kettle 2 and the tertiary crystallization kettle 3, rabbling mechanism includes agitator motor 5 and stirring rake 4, and stirring rake 4 includes (mixing) shaft 6 and is located paddle 7 on the (mixing) shaft 6, and (mixing) shaft 6 and agitator motor 5 link to each other. The stirring shaft 6 is provided with a sliding sleeve 8, and the sliding sleeve 8 is provided with a flow distribution paddle 9 arranged along the axis of the sliding sleeve. The splitter blade 9 adopts a helical blade fixed on the outer side of the sliding sleeve 8. The stirring shaft 6 is provided with an invagination ring groove 10, the sliding sleeve 8 is sleeved on the invagination ring groove 10, the length of the sliding sleeve 8 is smaller than the groove width of the invagination ring groove 10, and the length of the sliding sleeve 8 is half of the groove width of the invagination ring groove 10. The inner sunken ring groove 10 is positioned in the middle of the stirring shaft 6, two groups of blades are respectively arranged at two ends of the stirring shaft 6, and the two groups of blades at the same end of the stirring shaft 6 are arranged at intervals. The arrangement of the inward recessed ring groove 10 restrains the sliding sleeve 8, and the stroke of the sliding sleeve 8 is conveniently controlled. A circulating cooling water bath layer 12 is arranged outside the primary crystallization kettle 1, and a cooling water supply port 13 and a cooling water outlet 14 are arranged on the circulating cooling water bath layer 12; a freezing water bath layer 15 is arranged outside the secondary crystallization kettle 2, and a freezing water supply port 16 and a freezing water outlet 17 are arranged on the freezing water bath layer 15; a frozen brine bath layer 18 is arranged outside the third-stage cleaning kettle, and a brine water supply port 19 and a brine water outlet 20 are arranged on the frozen brine bath layer 18; the circulating cooling water bath layer 12, the freezing water bath layer 15 and the freezing brine bath layer 18 are all arranged in a jacket type. A feeding pipeline 21 is communicated with the first-stage crystallization kettle 1, a discharging pipeline 22 is communicated with the third-stage cleaning kettle, and a centrifugal machine 11 is arranged outside the discharging pipeline 22. Through 5 drive stirring rake 4 of agitator motor, realize cutting the vortex, and the setting of reposition of redundant personnel oar 9 can be accomplished and carry along 6 axial materials of (mixing) shaft, realizes more even abundant vortex, prevents to accumulate the crystallization micrite on the stirring leaf, guarantees rabbling mechanism's reliability.

When the device is used, materials are led into the first-stage crystallization kettle 1, the stirring mechanism operates, and the circulating cooling water bath layer 12 adopts circulating water at the temperature of 32-37 ℃; introducing the material obtained in the step A into a secondary crystallization kettle 2, operating a stirring mechanism, and adopting low-temperature water at 7-12 ℃ for a freezing water bath layer 15; introducing the material obtained in the step B into a three-stage crystallization kettle 3, operating a stirring mechanism, and adopting frozen saline at-10 to-15 ℃ in a frozen saline bath layer 18; and D, introducing the material obtained in the step C into a centrifuge 11, and realizing solid-liquid separation between microcrystal nuclei and liquid in the material through the centrifuge 11 to obtain crystals. When the stirring mechanism operates, after the stirring motor 5 positively rotates for a set time, the stirring motor 5 reversely rotates for a set time, and the positive rotation and the reverse rotation of the stirring motor 5 are alternately performed, wherein the set time is selected from 30 seconds to 600 seconds. Example takes 45 seconds. Forming a three-stage temperature gradient and gradually cooling the material in a three-stage crystallization kettle 3; the temperature change is controllable, and the crystal form is uniform; the continuous crystallization has high production efficiency, high capacity and high product qualification rate; the automation and the continuity are realized. The paddle 7 and the shunting paddle 9 can be driven to reciprocate by the forward rotation and the reverse rotation of the stirring motor 5, and the sliding sleeve 8 slides up and down, so that the efficient diversion efficiency is improved, and the crystallization efficiency is improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. A continuous crystallization device with high crystallization speed is characterized by comprising a primary crystallization kettle, a secondary crystallization kettle and a tertiary crystallization kettle, wherein the primary crystallization kettle, the secondary crystallization kettle and the tertiary crystallization kettle are sequentially communicated through pipelines, the arrangement heights of the primary crystallization kettle, the secondary crystallization kettle and the tertiary crystallization kettle are sequentially reduced, stirring mechanisms are respectively arranged in the primary crystallization kettle, the secondary crystallization kettle and the tertiary crystallization kettle, a circulating cooling water bath layer is arranged outside the primary crystallization kettle, and a cooling water supply port and a cooling water outlet are arranged on the circulating cooling water bath layer; a freezing water bath layer is arranged outside the secondary crystallization kettle, and a freezing water supply port and a freezing water outlet are arranged on the freezing water bath layer; a frozen brine bath layer is arranged outside the third-stage cleaning kettle, and a brine water supply port and a brine water outlet are arranged on the frozen brine bath layer; the one-level crystallization kettle is communicated with a feeding pipeline, the three-level clean kettle is communicated with a discharging pipeline, and the discharging pipeline is communicated with a centrifuge.

2. The continuous crystallization device with high crystallization speed as claimed in claim 1, wherein the stirring mechanism comprises a stirring motor and a stirring paddle, the stirring paddle comprises a stirring shaft and a paddle located on the stirring shaft, the stirring shaft is connected with the stirring motor, a sliding sleeve is slidably arranged on the stirring shaft, and a splitter paddle arranged along the axis of the sliding sleeve is arranged on the sliding sleeve.

3. The continuous crystallization apparatus with a high crystallization rate as claimed in claim 1, wherein the circulating cooling water bath layer, the freezing water bath layer and the freezing brine bath layer are all arranged in a jacket type.

4. The continuous crystallization device with high crystallization speed as claimed in claim 2, wherein the stirring shaft is provided with an inner concave ring groove, and a sliding sleeve is sleeved on the inner concave ring groove, and the length of the sliding sleeve is smaller than the groove width of the inner concave ring groove.

5. The continuous crystallization device with high crystallization speed as claimed in claim 4, wherein the recessed ring groove is located at the middle position of the stirring shaft, two sets of blades are respectively arranged at two ends of the stirring shaft, and the two sets of blades at the same end of the stirring shaft are arranged at intervals.

6. The continuous crystallization apparatus with a high crystallization rate as claimed in claim 2, wherein the length of the sliding sleeve is half of the width of the inner concave groove.

7. A continuous crystallizing device having a high crystallizing speed as claimed in claim 2, 4 or 6, wherein the flow dividing paddle is a helical blade fixed to the outside of the sliding sleeve.

Images