阅读说明：本技术 磁性材料在刮板式换热装置上的应用及装置和工艺 (Application of magnetic material in scraper type heat exchange device, device and process ) 是由 王宝才 于 2021-07-30 设计创作，主要内容包括：本发明提供磁性材料在刮板式换热装置上的应用及装置和工艺。所述刮板式换热装置设置有刮板、换热壁和出料口及出料管道,所述磁性材料为能被磁性物质或磁铁吸引或吸附的材料,所述刮板和/或换热壁采用该磁性材料制备得到,或在现有的刮板的外层以及与刮板接触的换热壁表面增加或覆盖一层所述磁性材料,并结合在出料口和/或出料管道设置的磁性材料收集过滤装置。本发明通过对传统刮板式换热器关键零部件的材料以及关键部位的科学改进,在合适位置配合设置吸引或吸附该材料的装置,有效解决了物料中的刮板与传热筒内壁和介质筒外壁之间因摩擦导致磨损而产生的微小颗粒以及破损小块混入加工物料的问题,避免加工物料中混入危害物质,提高物料的纯净度,尤其是应用于食品加工过程能有效保障安全性。(The invention provides an application of a magnetic material in a scraper type heat exchange device, a device and a process. The scraper type heat exchange device is provided with a scraper, a heat exchange wall, a discharge port and a discharge pipeline, the magnetic material is a material which can be attracted or adsorbed by a magnetic substance or a magnet, the scraper and/or the heat exchange wall are/is prepared by adopting the magnetic material, or a layer of the magnetic material is added or covered on the outer layer of the existing scraper and the surface of the heat exchange wall contacted with the scraper, and is combined with a magnetic material collecting and filtering device arranged at the discharge port and/or the discharge pipeline. The invention effectively solves the problem that the materials are mixed into the processing materials by tiny particles and small damaged blocks generated by abrasion between the scraper in the materials and the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder caused by friction through scientific improvement on the materials and key parts of the traditional scraper type heat exchanger and the matching arrangement of a device for attracting or adsorbing the materials at a proper position, avoids the harmful substances mixed into the processing materials, improves the purity of the materials, and can effectively ensure the safety especially when being applied to the food processing process.)

1. The scraper type heat exchange device is characterized in that the magnetic material is a material capable of being attracted or adsorbed by a magnetic substance or a magnet, the magnetic material is added or covered on the outer layer of the existing scraper and the surface of the heat exchange wall in contact with the scraper, and the magnetic material is combined with a magnetic material collecting and filtering device arranged on the discharge port and/or the discharge pipeline.

2. The use according to claim 1, characterized in that said scraper is made of PEEK material; or adding or covering a PEEK material layer on the outer surface of the existing scraper; or PEEK material is adopted on the part of the contact heat exchange wall of the existing scraper.

3. The use according to claim 1, wherein the heat exchange wall is made of a stainless steel material that can be attracted or adsorbed by magnetic substances or magnets; or the surface of the wall of the existing heat exchange wall, which is contacted with the scraper, is added or covered with stainless steel materials which can be attracted or adsorbed by magnetic substances or magnets.

4. Use according to claim 3, wherein the stainless steel material that can be attracted or adsorbed by magnetic substances or magnets is a two-phase stainless steel material.

5. The use according to claim 3, wherein the stainless steel material is 2205 stainless steel.

6. The use according to claim 1, characterized in that the magnetic material collecting and filtering device arranged at the discharge port and/or the discharge pipe is a magnetic filter, and the magnetism of the magnetic filter is not less than 12000Gs during operation.

7. Use according to claim 6, wherein the magnetic filter is a 12000 Gs-type filter.

8. A high-efficiency double-wall scraper heat exchange device comprises a driving part, a main shaft, a scraper, a heat transfer cylinder and a medium cylinder, wherein the heat transfer cylinder is arranged in the medium cylinder, the heat transfer cylinder and the medium cylinder are arranged concentrically or eccentrically, the main shaft penetrates through the heat transfer cylinder, the first end of the main shaft is arranged on a discharging part, the second end of the main shaft penetrates through a feeding part and is arranged on the driving part, the scraper is arranged in the heat transfer cylinder, the scraper is arranged on the main shaft, and the scraper is tightly attached to the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder.

9. The high efficiency double wall scraper heat exchange apparatus of claim 8, wherein the magnetic filter is magnetically adjustable; the magnetism is not less than 12000Gs when the magnetic material works.

10. The efficient double-wall scraper heat exchange process includes the following steps,

s1, injecting a material into a heat exchange device through a material inlet, wherein a scraper plate and a heat exchange wall of the heat exchange device are made of the magnetic material according to any one of claims 1 to 5;

s2, allowing a medium to enter a heat exchange device through a medium inlet;

s3, starting the heat exchange device, enabling the scraper to rotate along with the main shaft, enabling the materials to be in contact with the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder, and enabling the materials to be in reciprocating contact with the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder through scraping of the scraper;

and S4, starting a magnetic filter arranged at a material outlet of the heat exchange device, enabling the material to flow out of the heat exchange device from the material outlet after being processed, and adsorbing and capturing substances capable of being magnetically adsorbed in the material by the magnetic filter.

Technical Field

The invention relates to the technical field of processing devices, in particular to application of a magnetic material to a scraper type heat exchange device, a device and a process.

Background

The scraper type heat exchanger is a heat exchanger which accelerates the heat transfer efficiency by stirring feed liquid and processing a heat transfer surface by means of a scraper, and is suitable for the production of low-viscosity feed liquid, in particular for the rapid heat exchange operation of high-viscosity or particle-containing feed liquid. The high viscosity liquid material has high viscosity or slow flowing, so that in the ultra-high temperature sterilization treatment, the liquid material attached to the heat transfer surface of a common heat exchanger cannot be cleaned in time, the heat transfer surface is easy to generate a coking film, and the scraper type heat exchanger is most suitable. At present, the scraper heat exchanger is mainly made of PEEK, PTFE and stainless steel, and the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder are mainly made of stainless steel 316 or 304. In the process of working of the scraper heat exchanger, friction can be generated between a scraper and the inner wall of a heat transfer cylinder and the outer wall of a medium cylinder to cause abrasion, and Chinese application with the patent application number of CN201120025183.4 discloses a detachable inner cylinder scraper heat exchanger which can be detached and replaced after abrasion occurs to a material cylinder.

The scraper type heat exchanger is popular among food manufacturers such as candies, ice creams and the like and pharmaceutical manufacturers. In the processing process of food (products), materials enter the heat exchanger through the feeding hole, media (heating and cooling) enter the heat exchanger through the media inlet, the scraper rotates along with the stirring shaft at the position of the logistics heat exchange wall, the materials are in contact with the heat exchange wall, the materials are in reciprocating contact with the heat exchange wall through the scraping action of the scraper, heating or cooling is realized through heat exchange, and the products flow out of the heat exchanger from the material outlet; when the material flows through the heat exchanger, the scraper scrapes the heat exchange wall, so that some tiny particles are generated due to friction, the small particles come from the heat exchange wall and the scraper, and the small particles can enter the material and flow out of the heat exchanger along with the material; in the scraping process, some emergency situations, such as physical carrying of large metal blocks and the like, exist, and in the scraping process, due to the damage of the emergency situations, the scraping plate has the possibility of being broken, and at the moment, fragments of the scraping plate can also enter the material and flow out of the heat exchanger along with the material. This problem has not been studied and discovered in long-term production practice.

Therefore, in addition to the work of removing and replacing the worn blade, there are more important problems to find and propose a simple and easy solution: the scraper blade comprises a scraper blade, wherein in the working process of the scraper blade, after micro particles generated due to friction and the like fall off, the micro particles are remained in a material, or in the processing process, the scraper blade is damaged and falls off to enter the material, and generally high-viscosity materials are not filtered after being sterilized and cooled, so that the material is impure, if the scraper blade is used for processing food, a product containing the micro particles is eaten for a long time and is possibly harmful to the health, the harmful particles are not valued at present, the risk of harm caused by the damage of the scraper blade in the processing process is ignored, and the prior art including the patent application No. CN201120025183.4 does not disclose a treatment mode and a related structure of the particles generated due to abrasion.

Disclosure of Invention

The invention has outstanding improvement and influence on the prior art, in the production practice of the rather mature scraper type heat exchanger, researches and discovers major technical problems ignored by the field for a long time, and provides a simple and feasible solution, namely finding out the technical defects of the existing scraper type heat exchanger, providing the application of the magnetic material on the scraper type heat exchange device, solving the problem that the material is possibly mixed with tiny particles and damaged scraper fragments generated by friction between a scraper and a heat exchange wall, and providing a new and feasible technical scheme in the new technical field of ensuring the purity and safety of the material.

The invention also aims to provide a high-efficiency double-wall scraper heat exchange device; meanwhile, a new treatment process is provided.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the scraper type heat exchange device is provided with a scraper, a heat exchange wall, a discharge hole and a discharge pipeline, wherein the magnetic material is a material capable of being attracted or adsorbed by a magnetic substance or a magnet, the scraper and/or the heat exchange wall are/is made of the magnetic material, or the magnetic material is additionally arranged or covered on the outer layer of the existing scraper and the surface of the heat exchange wall in contact with the scraper, and is combined with a magnetic material collecting and filtering device arranged on the discharge hole and/or the discharge pipeline.

As one example, the scraper is made of PEEK material.

As another example, a layer of PEEK material may be added or coated on the exterior of an existing flight. The method of adding or covering may be by conventional methods known in the art including, but not limited to, coating, welding, bonding, and the like.

As another example, PEEK material can be adopted in the contact heat exchange wall part of the prior scraper.

As one example, the heat exchange wall is made of stainless steel material which can be attracted or adsorbed by magnetic substances or magnets.

As another example, a stainless steel material capable of being attracted or adsorbed by a magnetic substance or a magnet may be added or coated on the wall surface of the existing heat exchange wall contacting with the scraper.

Preferably, the stainless steel material capable of being attracted or adsorbed by the magnetic substance or the magnet is a two-phase stainless steel material.

Further preferably, the stainless steel material is 2205 stainless steel.

As one embodiment, the magnetic material collecting and filtering device arranged at the discharge port and/or the discharge pipeline adopts a magnetic filter, and the magnetism of the magnetic filter in operation is not less than 12000 Gs.

The magnetic filter can adopt a 12000Gs type filter.

The invention also provides a high-efficiency double-wall scraper heat exchange device which comprises a driving part, a main shaft, a scraper, a heat transfer cylinder and a medium cylinder, wherein the heat transfer cylinder is arranged in the medium cylinder, the heat transfer cylinder and the medium cylinder are arranged concentrically or eccentrically, the main shaft penetrates through the heat transfer cylinder, the first end of the main shaft is arranged on a discharging part, the second end of the main shaft penetrates through a feeding part and is arranged on the driving part, the scraper is arranged in the heat transfer cylinder, the scraper is arranged on the main shaft, the scraper is tightly attached to the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder, the high-efficiency double-wall scraper heat exchange device also comprises a material outlet, a magnetic filter is connected to the material outlet, and the scraper, the heat transfer cylinder and the medium cylinder are all made of materials which can be adsorbed by magnetic materials.

In the scheme, the material is injected into the heat exchange device through the material inlet; the medium enters the heat exchange device through the medium inlet; starting the heat exchange device, enabling the scraper to rotate along with the main shaft, enabling the materials to be in contact with the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder, and enabling the materials to be in reciprocating contact with the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder through scraping of the scraper; the magnetic filter arranged at the material outlet of the heat exchange device is started, the material flows out of the heat exchange device from the material outlet after being processed, and the scraping plate in the material, the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder can generate friction to cause the abraded micro particles and the damaged scraping plate to be adsorbed and captured by the magnetic filter.

The magnetic filter can be arranged at the discharge port and also can be arranged at a proper position of the discharge pipeline. If necessary, the device can be simultaneously installed at the discharge port and the discharge pipeline, and the device can be determined according to specific application scenes.

Preferably, the magnetic filter is adjustable in magnetic magnitude.

In the scheme, the magnetic filter can better adsorb and capture magnetic substances in the materials by adjusting the magnetism, so that the magnetic substances in the materials are reduced.

Preferably, the magnetic filter has a magnetic property of no less than 12000Gs in operation.

Preferably, the heat transfer cylinder and the media cylinder are made of a dual phase steel material.

In the scheme, the heat transfer cylinder and the medium cylinder which are made of the bidirectional steel material not only have wear-resistant property, but also have magnetism on particles generated by friction, so that the particles are conveniently adsorbed and captured by the magnetic filter.

Preferably, the scraper is made of PEEK.

Among the above-mentioned scheme, the scraper blade that the PEEK material was made not only can have wear-resisting nature, and the granule that its friction produced simultaneously has magnetism, is convenient for adsorb the seizure by magnetic filter.

A process for efficient double-wall scraper heat exchange applies any one of the efficient double-wall scraper heat exchange devices.

In the scheme, the process adopts the efficient double-wall scraper heat exchange device, so that magnetic substances in materials can be effectively adsorbed and captured, the magnetic substances in the materials are reduced, and the purity of the materials is improved.

The invention also provides a high-efficiency double-wall scraper heat exchange process, which comprises the following steps,

step 1, injecting materials into a heat exchange device through a material inlet;

step 2, the medium enters the heat exchange device through a medium inlet;

step 3, starting the heat exchange device, enabling the scraper to rotate along with the main shaft, enabling the materials to be in contact with the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder, and enabling the materials to be in reciprocating contact with the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder through scraping of the scraper;

and 4, starting a magnetic filter arranged at a material outlet of the heat exchange device, enabling the material to flow out of the heat exchange device from the material outlet after being processed, and adsorbing and capturing substances capable of being magnetically adsorbed in the material by the magnetic filter.

Preferably, in step 4, the substances capable of being magnetically adsorbed comprise particles generated by scraping the scrapers with the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder, metal brought in when the materials are injected, and fragments formed by crushing the scrapers.

Preferably, in step 4, a filter screen for filtering a relatively large volume of metal substances is arranged between the thermal device material outlet and the magnetic filter.

In the scheme, the filtering net is used for improving the filtering safety of the magnetic substance by filtering the metal substance with larger volume.

Preferably, in step 2, the medium includes a heating medium and a cooling medium.

In the scheme, the process can be used for hot processing or cold processing of materials, so that the applicability of the process is improved.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

the scraper heat exchanger provided by the invention has the advantages that the materials of the barrel and the scraper of the scraper heat exchanger are scientifically designed, small particles and scraper fragments generated by friction can be successfully sucked out of materials by combining the ingenious application of the device, hazardous substances are prevented from being mixed in the processed materials, the purity of the materials is improved, and particularly the safety is guaranteed in the food processing process.

The invention applies the inventive idea to the improvement of the device equipment, and provides a high-efficiency double-wall scraper heat exchange device and a process thereof, which solves the problems of tiny particles and damaged scrapers caused by abrasion among scrapers in materials, the inner wall of a heat transfer cylinder and the outer wall of a medium cylinder by changing the materials of the heat transfer cylinder and the medium cylinder and adding a magnetic filter; the safety of the heat exchange device and the process of the device using the heat exchange device are improved and the purity of materials is improved by adjusting the magnetic filter and adding the filter screen.

Drawings

Fig. 1 is a schematic structural diagram of the high-efficiency double-wall scraper heat exchange device of the invention.

Fig. 2 is a simplified schematic diagram of a heat exchange process flow combining the structure of fig. 1.

Fig. 3 is a schematic sectional view of a scraper heat exchanger according to another embodiment of the present invention.

Wherein: 1. a drive section; 2. a main shaft; 3. a squeegee; 4. a heat transfer cylinder; 5. a media cartridge; 6. a magnetic filter; 7. a scraper type heat exchange device; 8. a media inlet; 9. a material inlet; 10. a material outlet; 11. a media outlet; 41. a magnetic material layer.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent;

for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;

it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1, a high-efficiency double-wall scraper heat exchange device comprises a driving part 1, a main shaft 2, a scraper 3, a heat transfer cylinder 4 and a medium cylinder 5, wherein the heat transfer cylinder 4 is arranged in the medium cylinder 5, the heat transfer cylinder 4 and the medium cylinder 5 are arranged concentrically or eccentrically, the main shaft 2 penetrates through the heat transfer cylinder 4, a first end of the main shaft 2 is arranged on a discharging part, a second end of the main shaft 2 penetrates through a feeding part and is arranged on the driving part 1, the scraper 3 is arranged in the heat transfer cylinder 4, the scraper 3 is arranged on the main shaft 2, and the scraper 3 is tightly attached to the inner wall of the heat transfer cylinder 4 and the outer wall of the medium cylinder 5.

The material is injected into the heat exchange device through the material inlet; the medium enters the heat exchange device through the medium inlet; starting a heat exchange device, enabling the scraper 3 to rotate along with the main shaft 2, enabling the materials to be in contact with the inner wall of the heat transfer cylinder 4 and the outer wall of the medium cylinder 5, and enabling the materials to be in reciprocating contact with the inner wall of the heat transfer cylinder 4 and the outer wall of the medium cylinder 5 through the scraping action of the scraper 3; the magnetic filter 6 arranged at the material outlet of the heat exchange device is started, the material flows out of the heat exchange device from the material outlet after being processed, and the scraping plate 3 in the material, the inner wall of the heat transfer cylinder 4 and the outer wall of the medium cylinder 5 can generate friction to cause the abraded micro particles and the damaged scraping plate 3 to be adsorbed and captured by the magnetic filter 6. The magnetic filter can adopt the prior art, and is improved according to the size of the heat exchanger.

The magnetic filter 6 has adjustable magnetism, and the magnetic filter 6 reduces the magnetic substances in the materials by adjusting the magnetism so as to better adsorb and capture the magnetic substances in the materials, and the magnetic filter 6 adopts a 12000Gs type filter.

The heat transfer cylinder 4 and the medium cylinder 5 are made of a dual-phase steel material (2205), and the heat transfer cylinder 4 and the medium cylinder 5 made of the dual-phase steel material not only have wear resistance, but also have magnetism on particles generated by friction thereof so as to be conveniently adsorbed and captured by the magnetic filter 6.

The scraper blade 3 is made by the PEEK material, and the scraper blade 3 that the PEEK material was made not only can have wear-resisting nature, and the granule that its friction produced simultaneously has magnetism, is convenient for adsorb the seizure by magnetic filter 6.

The simple process flow of the high-efficiency double-wall scraper heat exchange process is shown in figure 2. The high-efficiency double-wall scraper heat exchange device is applied to any one of the above devices.

The process adopts the high-efficiency double-wall scraper heat exchange device, so that magnetic substances in materials can be effectively adsorbed and captured, the magnetic substances in the materials are reduced, and the purity of the materials is improved.

In particular to a high-efficiency double-wall scraper heat exchange process, which comprises the following steps,

step 1, injecting materials into a heat exchange device 7 through a material inlet 9;

step 2, the medium enters a heat exchange device 7 through a medium inlet 8;

step 3, starting the heat exchange device, enabling the scraper 3 to rotate along with the main shaft 2, enabling the materials to be in contact with the inner wall of the heat transfer cylinder 4 and the outer wall of the medium cylinder 5, and enabling the materials to be in reciprocating contact with the inner wall of the heat transfer cylinder 4 and the outer wall of the medium cylinder 5 through the scraping action of the scraper 3;

and 4, starting a magnetic filter 6 arranged at a material outlet of the heat exchange device, enabling the processed material to flow out of the heat exchange device 7 from a material outlet 10, and adsorbing and capturing substances capable of being magnetically adsorbed in the material by the magnetic filter 6.

In particular, in step 4, the substances capable of being magnetically adsorbed include particles generated by scraping the scraper 3 with the inner wall of the heat transfer cylinder 4 and the outer wall of the medium cylinder 5, metals brought in when the materials are injected, and fragments formed by crushing the scraper 3.

Particularly, in step 4, a filter screen for filtering a metal substance with a larger volume is arranged between the material outlet of the thermal device and the magnetic filter 6, and the filter screen improves the safety of the magnetic substance filtration by filtering the metal substance with the larger volume as a process.

In particular, in step 2, the media comprise a heating medium and a refrigerating medium, and the process can be used for hot working or cold working of materials, so that the applicability of the process is improved.

The invention is tested in the laboratory of the applicant for a long time, and the invention proves that small particles and scraper fragments generated by friction can be effectively sucked out of materials.

Example 2

This embodiment provides an application scheme of magnetic material on scraping board heat transfer device, and current scraping board heat transfer device is provided with scraper blade 3, heat transfer wall 4 and discharge gate and ejection of compact pipeline, as shown in fig. 3. The magnetic material is a material which can be attracted or adsorbed by magnetic substances or magnets, the magnetic material layer 41 is added or covered on the outer layer (not shown in figure 3) of the existing scraper and the surface of the heat exchange wall 4 contacted with the scraper, and the magnetic material collecting and filtering device is arranged on the discharge port and/or the discharge pipeline (see example 1 and not shown in figure 3).

The scraper can be made of PEEK material.

The method of adding or covering may be by conventional methods known in the art including, but not limited to, coating, welding, bonding, and the like.

The wall surface of the heat exchange wall 4 that is in contact with the scraper 3 is augmented or covered with a stainless material 41 that can be attracted or attracted by a magnetic substance or magnet. The stainless steel material capable of being attracted or adsorbed by the magnetic substance or the magnet is a two-phase stainless steel material. Further preferably, the stainless steel material is 2205 stainless steel.

The procedure can be seen in example 1.

The invention has outstanding improvement and influence on the prior art, in the production practice of rather mature scraper type heat exchangers, researches and discovers major technical problems ignored by the field for a long time, and provides a simple and feasible solution, provides application of magnetic materials on a scraper type heat exchange device, solves the problem that micro particles and damaged scraper fragments generated by friction between a scraper and a heat exchange wall are possibly mixed in materials, and provides a new and feasible technical scheme in the new technical field of ensuring the purity and safety of the materials. By changing the materials of the heat transfer cylinder and the medium cylinder and adding the magnetic filter, the problems of tiny particles which are abraded and broken scrapers caused by friction among the scrapers in the materials, the inner wall of the heat transfer cylinder and the outer wall of the medium cylinder are solved; the safety of the heat exchange device and the process of the device using the heat exchange device are improved and the purity of materials is improved by adjusting the magnetic filter and adding the filter screen.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.