Drum-type ball mill evaporator

Abstract

The application discloses a drum-type ball mill evaporation machine, which comprises a heat-insulating shell, a volute inner container and two hollow shafts, one of the hollow shafts is connected with a volute driving device, a feeding device is arranged through the volute driving device and the hollow shaft connected with the volute driving device, the discharging end of the feeding device is located in the volute inner container, a steam feeding pipe for supplying low-pressure steam to the volute inner container is arranged through the other hollow shaft, and the volute inner container is filled with grinding bodies; after high-salt concentrated liquid is sprayed into the volute inner container, the concentrated liquid falls on the inner wall of the volute inner container and the surface of the grinding bodies, under the heating action of the supplied low-pressure steam, the water in the concentrated liquid is evaporated and crystalline bodies are formed, the heat transfer area of the volute inner container and the grinding bodies is greatly increased, the crystalline bodies formed are dynamic and dry solid particles from formation to discharge, the crystalline bodies are easy to discharge and cannot cause the discharge port to be blocked, the machine eliminates the stoppage and dredging work, the processing efficiency is improved, the machine has low cost and low operation cost, and is easy to popularize and use in small and micro-scale enterprises.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of separation of high-salt concentrated liquid in industrial wastewater recycling treatment, and particularly relates to a drum-type ball mill evaporation machine. BACKGROUND

[0002] In the production process of steel, petrochemical industry, non-ferrous metal, textile, papermaking, food and other industries, a large amount of water resources is consumed, and a large amount of industrial wastewater is also generated simultaneously, so industrial wastewater recycling treatment is needed to achieve the purpose of saving water resources. Therefore, the departments have issued the implementation scheme of industrial wastewater recycling, which requires that by 2025, the reuse rate of industrial water above scale will reach about 94%, especially the reuse rate of industrial water above scale in steel, petrochemical industry, non-ferrous metal and other industries will be further improved, and the reuse rate of industrial water above scale in textile, papermaking, food and other industries will be increased by more than 5 percentage points compared with that in 2020, which further illustrates the importance of industrial wastewater recycling.

[0003] The membrane desalination process is one of the important processes in the industrial wastewater recycling treatment process, and high-salt concentrated liquid is usually generated in the treatment process. The impurities in the concentrated liquid are currently separated by multi-effect evaporation or MVR evaporation treatment equipment. After the separation of the concentrated liquid, two substances, i.e. crystalline and water, are generated. The water is first evaporated to form water vapor in the separation process, and the condensed water can be reused after the heat recovery of the water vapor. The crystalline is directly discharged for recycling treatment. In addition to the impurity components, the concentrated liquid also contains a large amount of organic matter, calcium and magnesium ions, sulfate and other substances. When the water is recycled, the above-mentioned substances are easy to scale on the surface of the heat exchange equipment and evaporation equipment, which not only affects the separation efficiency, but also easily blocks various outlets of the equipment, resulting in increased energy consumption and frequent shutdown and cleaning during the separation process.

[0004] With the development of industrial wastewater recycling technology, a more efficient membrane evaporation drying crystallization system has been developed and utilized abroad. The system solves the problems of scaling and blocking by installing a scraper inside. Although the system eliminates the technical defects of low efficiency and frequent shutdown and cleaning to some extent, the system itself is very expensive, and the scraper is used frequently and wears out quickly. In order to ensure the cleaning effect, the scraper needs to be replaced or maintained frequently, and the scraper is made of special material and structure, so the price is very expensive. Therefore, it is difficult to promote and utilize the system in small and medium-sized enterprises. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a drum-type ball mill evaporation machine which does not need frequent shutdown and cleaning and maintenance, has low cost, is easy to promote and use in medium-sized enterprises below, and is helpful to improve the overall reuse rate of industrial wastewater.

[0006] In order to solve the above technical problems, the technical scheme of the present application is: the drum type ball mill evaporator, comprising a fixedly installed heat insulation shell, a volute inner container is rotatably sleeved in the heat insulation shell, the heat insulation shell and the volute inner container are respectively arranged as closed hollow structures and a heat insulation inner cavity is formed between the two, hollow shafts are respectively and sealingly and fixedly connected through both ends of the volute inner container, the two hollow shafts respectively extend to the outside of the heat insulation shell and are sealingly and rotatably arranged between the heat insulation shell, one of the hollow shafts is drivingly connected with a volute driving device, a feeding device is provided through the volute driving device and the hollow shaft connected therewith, the discharging end of the feeding device is located in the volute inner container, a steam feeding pipe for supplying low-pressure steam to the volute inner container is provided through the other hollow shaft, the feeding device and the steam feeding pipe are respectively rotatably matched with the corresponding hollow shaft, and grinding bodies are filled in the volute inner container.

[0007] As a preferred technical scheme, the volute inner container comprises a volute body which is gradually and obliquely arranged from the feeding device to the steam feeding pipe, an inner wall of the volute body is provided with a feeding spiral plate extending towards the center of the volute body, and the volute body is further provided with an annular mesh screen and a steam distribution heating device used in cooperation with the steam feeding pipe.

[0008] As a preferred technical scheme, the steam distribution heating device comprises a steam chamber sealingly arranged between the outer side of the annular mesh screen and the port of the steam feeding pipe, a heating coil pipe is wound and arranged on the outer wall of the volute body, the heating coil pipe is arranged in communication with the steam chamber, a steam drain valve is correspondingly arranged at the tail end of the heating coil pipe, and the steam drain valve is arranged at the low end of the volute body.

[0009] As a preferred technical scheme, the inner diameter of the feeding end of the volute body is much larger than the inner diameter of the discharging end.

[0010] As a preferred technical scheme, the heat insulation shell comprises a shell body which is coaxially arranged with the volute body, a waste steam outlet is arranged at the top end of the shell body, a condensate outlet and a solid material outlet are arranged at the bottom end of the shell body, the waste steam outlet, the condensate outlet and the solid material outlet are respectively arranged in communication with the heat insulation inner cavity, a discharging device is arranged on the solid material outlet, and the discharging device is arranged directly below the annular mesh screen.

[0011] As a preferred technical scheme, the discharging device comprises a receiving hopper which is arranged through the solid material outlet, and an air blower is arranged at the discharging end of the receiving hopper.

[0012] As a preferred technical scheme, the feeding device comprises a feeding pipe which is coaxially arranged with the hollow shaft, the feeding pipe is arranged to extend upwards in the volute body and the discharging port is arranged to be downwardly sprayed.

[0013] As a preferred technical scheme, the bottom of the heat insulation shell is arranged with shell support legs, and the shell support legs are arranged in a gradually increasing manner along the material conveying direction of the material conveying spiral plate, and the volute driving device comprises a pressure rotary reducer, and the pressure rotary reducer is arranged on the lower end of the shell support leg.

[0014] As a preferred technical scheme, the hollow shaft sleeved outside the steam feeding pipe is mounted on the shell support leg through a fixing cylinder, and the hollow shaft is rotationally matched with the fixing cylinder through a rotary support, and mechanical seal members are respectively arranged between the steam feeding pipe and the fixing cylinder, between the heat insulation shell and the hollow shaft, and between the feeding device and the hollow shaft.

[0015] As an improvement of the above technical scheme, the heat insulation shell is a detachable split shell and is arranged in a sealed connection manner at the split position, and the heat insulation shell corresponds to the shape of the volute body; and the grinding body is arranged as a spherical body.

[0016] Due to the adoption of the above technical scheme, the drum-type ball mill evaporator comprises a fixedly mounted heat insulation shell, a volute inner container is rotationally sleeved in the heat insulation shell, the heat insulation shell and the volute inner container are respectively arranged as closed hollow structures and form a heat insulation inner cavity therebetween, hollow shafts are respectively arranged in a penetrating and sealed and fixed connection manner at both ends of the volute inner container, the hollow shafts are respectively extended to the outside of the heat insulation shell and are arranged in a sealed and rotational manner with the heat insulation shell, one of the hollow shafts is drivingly connected with a volute driving device, a feeding device is arranged in a penetrating manner through the volute driving device and the hollow shaft connected therewith, the feeding device is arranged at the material outlet end in the volute inner container, a steam feeding pipe for supplying low-pressure steam to the volute inner container is arranged in a penetrating manner through the other hollow shaft, the feeding device and the steam feeding pipe are respectively rotationally matched with the corresponding hollow shaft, and the volute inner container is filled with grinding bodies; the drum-type ball mill evaporator has the following beneficial effects: the high-salt concentrated liquid formed by treating industrial wastewater is sprayed into the volute inner container by the feeding device, falls on the inner wall of the volute inner container and the surface of the grinding bodies, and under the heating action of the low-pressure steam supplied by the steam feeding pipe, the water in the concentrated liquid is evaporated and forms crystalline bodies, so that desalination is realized, the volute inner container and the grinding bodies are matched, the heat transfer area is greatly increased, and under the action of the heat insulation shell, the heat loss is low, the crystalline bodies are in a dynamic and dry solid particle state after being formed and are easily discharged, so that the discharge outlet is not blocked, the stoppage dredging work is eliminated, the treatment efficiency is improved, the cost is low, the operation cost is low, and the drum-type ball mill evaporator is easy to popularize and use in small and micro-scale enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0017] The following drawings are only intended to illustrate and explain the present application and do not limit the scope of the present application. Among them:

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle;

[0021] Figure 4 yes Figure 2 Enlarged view of the structure at point B;

[0022] In the diagram: 1-Insulated outer shell; 101-Outer shell body; 102-Waste steam outlet; 103-Condensate outlet; 104-Receiving hopper; 105-Air shut-off fan; 2-Vortex inner liner; 201-Vortex body; 202-Steam trap; 203-Feeding spiral plate; 204-Annular screen; 205-Steam chamber; 206-Heating coil; 3-Insulated inner cavity; 4-Feed pipe; 5-Outer shell support leg; 6-Hollow shaft; 7-Steam inlet pipe; 8-Grinding body; 9-Fixed cylinder; 10-Mechanical seal; 11-Press-driven rotary reducer. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a drum-type ball mill evaporator is used to desalinate high-salt concentrates formed during industrial wastewater treatment. After connecting pipelines, it can also recover and utilize steam heat. Specifically, it includes a fixedly installed insulated outer shell 1, within which a volute inner liner 2 is rotatably mounted. Both the insulated outer shell 1 and the volute inner liner 2 are enclosed hollow structures, forming an insulated inner cavity 3 between them. The main functions of the insulated inner cavity 3 are: to collect condensate formed after heating the volute inner liner 2 for centralized drainage; to collect water vapor that cannot be discharged in time during the heating process of the volute inner liner 2; and to form a hollow insulation layer on the outside of the volute inner liner 2 to reduce the heat dissipation rate of the volute inner liner 2 and maximize heat utilization.

[0025] The bottom of the heat insulation shell 1 is arranged with shell support legs 5, and the shell support legs 5 are arranged in a gradually increasing manner along the material running direction in the volute inner container 2, so that the heat insulation shell 1 is in an inclined state with the feed end being low and the discharge end being high, which is beneficial to the discharge of the internal condensed liquid and the operation of the volute inner container 2. The heat insulation shell 1 can be arranged as a detachable split shell body to facilitate the installation and maintenance of the internal components, and the split part needs to be sealed and connected to avoid steam leakage.

[0026] The heat insulation shell 1 comprises a shell body 101, and the top end of the shell body 101 is provided with a waste steam outlet 102 which is arranged in communication with the heat insulation inner cavity 3. During the addition of the high-salt concentrated liquid in the volute inner container 2, the water is evaporated to form a large amount of water vapor, which can be directly discharged outside the heat insulation shell 1 through the waste steam outlet 102. When the gas amount is too large to be discharged in time, part of the water vapor can also enter the heat insulation inner cavity 3 first. A pipeline for conveying water vapor can be installed on the waste steam outlet 102 for recycling the heat in the water vapor. The bottom end of the shell body 101 is provided with a condensed liquid outlet 103 and a solid material outlet, and the condensed liquid outlet 103 and the solid material outlet are also arranged in communication with the heat insulation inner cavity 3, and a discharge device is installed on the solid material outlet. The condensed liquid outlet 103 is used to discharge the condensed water formed in the heat insulation inner cavity 3, and a control valve can be installed at the condensed liquid outlet 103 for periodic water discharge. The solid material outlet is used to discharge the crystals generated in the separation process. The discharge device comprises a receiving hopper 104 installed through the solid material outlet, and a fan 105 is installed at the discharge end of the receiving hopper 104. When a certain amount of crystals accumulate in the receiving hopper 104, the fan 105 is driven to rotate under the action of the gravity of the crystals, so as to realize the automatic discharge of the crystals. When there is no crystal discharge, the fan 105 closes the bottom end of the receiving hopper 104 to prevent steam leakage.

[0027] The two ends of the volute inner container 2 are respectively sealed and fixedly connected with hollow shafts 6, and the two hollow shafts 6 respectively extend to the outside of the heat insulation shell 1 and are arranged in sealed rotation between the heat insulation shell 1, so that the volute inner container 2 forms a roller type structure, and one of the hollow shafts 6 is drivingly connected with a volute driving device. In the embodiment, the volute driving device comprises a pressure rotary reducer 11, and the pressure rotary reducer 11 is arranged on the lower end of the shell support leg 5. After the pressure rotary reducer 11 is connected with a motor, the hollow shaft 6 can be driven to rotate the volute inner container 2, so as to facilitate the flow of the concentrated liquid in the volute inner container 2, thereby improving the water evaporation speed and ensuring the desalination efficiency and effect.

[0028] The feeding device is arranged through the volute driving device and the hollow shaft 6 connected therewith, the discharge end of the feeding device is located in the volute inner liner 2, and the discharge device is arranged on the shell body 101 away from the side of the feeding device, the feeding device is used for spraying concentrated liquid into the volute inner liner 2. Another hollow shaft 6 is provided with a steam inlet pipe 7 for supplying low-pressure steam to the volute inner liner 2, the feeding device and the steam inlet pipe 7 are respectively rotationally matched with the corresponding hollow shaft 6, the volute inner liner 2 is filled with grinding bodies 8, and the grinding bodies 8 are arranged as spheres, such as zirconia balls. The concentrated liquid sprayed by the feeding device is distributed on the inner wall of the volute inner liner 2 and the surface of the grinding bodies 8, the grinding bodies 8 are in a high-temperature environment in the volute inner liner 2, and the temperature of the volute inner liner 2 is also high, so that the concentrated liquid falling on the surface of the grinding bodies 8 can be quickly heated, the water in the concentrated liquid is evaporated, and a crystal body is formed on the surface of the grinding bodies 8.

[0029] In the embodiment, the feeding device includes a feeding pipe 4 coaxially arranged with the hollow shaft 6, the feeding pipe 4 is arranged to extend upward in the volute inner liner 2 and the discharge port is arranged to spray downward, the discharge end of the feeding pipe 4 is located at a high position in the volute inner liner 2, so that the spraying area of the concentrated liquid is large and the distribution is more uniform.

[0030] The hollow shaft 6 sleeved outside the steam inlet pipe 7 is installed on the shell support leg 5 through a fixing cylinder 9, and the hollow shaft 6 is rotationally matched with the fixing cylinder 9 through a rotary support, mechanical seals 10 are respectively arranged between the steam inlet pipe 7 and the fixing cylinder 9, between the hollow shaft 6 and the heat-insulating shell 1, and between the feeding device and the hollow shaft 6, and the rotational matching between the hollow shaft 6 and the mechanical seals 10 is completed under the cooperation of rotary parts such as rotary supports and bearings, which is well known to ordinary skilled persons in the art and will not be described in detail here.

[0031] The volute inner liner 2 includes a volute body 201 arranged to gradually incline from the feeding device to the steam inlet pipe 7, and the shell body 101 is coaxially arranged with the volute body 201, a feeding spiral plate 203 extending towards the center of the volute body 201 is installed on the inner wall of the volute body 201, the feeding spiral plate 203 is used for conveying the grinding bodies 8 and the crystal body accumulated in the volute body 201 towards the position of the solid material outlet, facilitating the discharge of the material. The shell support leg 5 is gradually arranged to be high along the material conveying direction of the feeding spiral plate 203, so that the shell body 101, the volute body 201 and the feeding spiral plate 203 are in an inclined state.

[0032] The volute body 201 is provided with a ring-shaped screen 204 corresponding to the solid material outlet, i.e. the discharge device is arranged directly below the ring-shaped screen 204, the ring-shaped screen 204 is used for screening the crystal and the grinding body 8, and the crystal is discharged to the receiving hopper 104, so that the grinding body 8 falls back to the feeding end along the top end of the material conveying spiral plate 203. The volute body 201 is also provided with a steam distribution heating device used in cooperation with the steam inlet pipe 7, which is used to distribute the low-pressure steam sent through the steam inlet pipe 7, so that the steam is uniformly distributed on the outer wall of the volute body 201, the volute body 201 is heated, and a high-temperature environment is maintained in the volute body 201 to evaporate the water in the concentrated liquid.

[0033] Specifically, the steam distribution heating device includes a steam chamber 205 arranged in sealing between the outer side of the ring-shaped screen 204 and the port of the steam inlet pipe 7, a heating coil 206 arranged on the outer wall of the volute body 201, the heating coil 206 is arranged in communication with the steam chamber 205, and a steam trap valve 202 is arranged at the tail end of the heating coil 206, and the steam trap valve 202 is arranged at the low end of the volute body 201. The condensed water formed in the heating coil 206 can be discharged into the heat-insulated inner cavity 3 through the steam trap valve 202, so as to be uniformly discharged through the condensed liquid outlet 103. The inner diameter of the feeding end of the volute body 201 is much larger than the inner diameter of the discharging end, and the heat-insulated shell 1 corresponds to the shape of the volute body 201, which can ensure the desalination effect, facilitate the discharge of the crystal, and save materials and reduce costs.

[0034] The specific working process of the embodiment is as follows:

[0035] The high-salt concentrated liquid to be separated is preheated by a specially arranged heat exchanger (which can be connected with the waste steam outlet 102 to realize preheating and recycling of water vapor), and then sprayed into the volute body 201 through the feeding pipe 4. The concentrated liquid falls on the inner wall of the volute body 201, part of the material conveying spiral plate 203 and the surface of the grinding body 8, and finally accumulates at the bottom of the volute body 201; the external low-temperature high-pressure steam enters the steam chamber 205 through the steam inlet pipe 7 and enters the heating coil 206 to heat the volute body 201, so that the volute body 201, the material conveying spiral plate 203 and the grinding body 8 are in a high-temperature state. The sprayed concentrated liquid is heated to evaporate the water inside to form water vapor, which enters the heat-insulated inner cavity 3 from the ring-shaped screen 204 or is discharged through the waste steam outlet 102, and the salt forms crystals and adheres to the above-mentioned components.

[0036] Due to the continuous rotation of the volute body 201, the concentrated liquid material collected at the bottom is continuously scraped up and falls down, and is spread on the surface of the grinding body 8 to be continuously dried and to precipitate crystals. The continuous rising and free falling of the grinding body 8 rubs against each other between the grinding body 8 and the inner wall of the volute body 201 and the material conveying spiral plate 203, so that the adhered crystal material is continuously detached. The rotation of the volute body 201 drives the synchronous rotation of the material conveying spiral plate 203, which conveys the detached crystals and part of the grinding body 8 to the ring-shaped screen 204 for screening, and the separated crystals pass through the ring-shaped screen 204 into the receiving hopper 104 and are discharged by the air lock fan 105. The grinding body 8 is intercepted and accumulates at the top end of the material conveying spiral plate 203 to re-rolling down to the feeding end of the volute body 201 to complete the desalination work. The purpose of the inclined arrangement of the volute body 201 is to ensure the smooth falling of the grinding body 8. Moreover, in the process of mutual collision of the grinding body 8, the formed crystals can also be ground into granular or powdery shape, and the material discharged is relatively dry, which is difficult to cause blockage of the solid material outlet.

[0037] The embodiment has the following advantages:

[0038] 1. The overall configuration is simple, the cost is low, and it is easy to maintain and operate;

[0039] 2. Steam heating is adopted, the energy saving effect is good, the operation cost is low, and the heat in the discharged large amount of water vapor can also be recycled;

[0040] 3. The volute inner shell design is adopted, which cooperates with the grinding body, the heat transfer surface area is obviously increased, the heat loss is low after the internal heat insulation shell is arranged, there is no any consumable, and the failure rate is low;

[0041] 4. The scaling and blocking phenomenon is eliminated, the output material is in the form of solid particles or powder, and the whole separation process is in a moving state, so it is not easy to block;

[0042] 5. By controlling the output rate, water can be directly evaporated, and the crystals can be ground into powder during the conveying and discharging process of the crystals, so that the additional grinding process is eliminated, which is helpful to simplify the process.

[0043] The description of the present application is given for example and description, and is not exhaustive or limits the present application to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The selection and description of the embodiments are to better illustrate the principles and practical application of the present application, and to enable those skilled in the art to understand the present application so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A roller ball mill evaporator comprising a fixedly mounted insulated housing, characterized in that: The heat insulation shell is sleeved with a volute inner container, the heat insulation shell and the volute inner container are respectively provided as closed hollow structures and a heat insulation inner cavity is formed between the heat insulation shell and the volute inner container, hollow shafts are respectively and sealingly connected at both ends of the volute inner container, the hollow shafts are respectively extended to the outside of the heat insulation shell and sealingly arranged in rotation with the heat insulation shell, one of the hollow shafts is drivingly connected with a volute driving device, a feeding device is arranged through the volute driving device and the hollow shaft connected with the volute driving device, the feeding device is arranged in the volute inner container, a steam feeding pipe for supplying low-pressure steam to the volute inner container is arranged through the other hollow shaft, the feeding device and the steam feeding pipe are respectively rotationally matched with the corresponding hollow shaft, and the volute inner container is filled with grinding bodies. The volute inner container comprises a volute body which is gradually and obliquely arranged from the feeding device to the steam feeding pipe, an inner wall of the volute body is provided with a feed conveying spiral plate which extends towards the center of the volute body, and the volute body is further provided with an annular mesh screen and a steam distribution heating device which is used in cooperation with the steam feeding pipe. The steam distribution heating device comprises a steam chamber which is sealingly arranged between the outside of the annular mesh screen and the port of the steam feeding pipe, a heating coil pipe which is arranged on the outer wall of the volute body in a winding manner, the heating coil pipe is in communication with the steam chamber, a steam trap valve is correspondingly arranged at the tail end of the heating coil pipe, and the steam trap valve is arranged at the low end of the volute body. The heat insulation shell comprises a shell body which is coaxially arranged with the volute body, the top end of the shell body is provided with a waste steam outlet, the bottom end of the shell body is provided with a condensate outlet and a solid material outlet, the waste steam outlet, the condensate outlet and the solid material outlet are respectively in communication with the heat insulation inner cavity, a discharging device is arranged on the solid material outlet, and the discharging device is arranged directly below the annular mesh screen.

2. The drum ball mill evaporator of claim 1, wherein: The inner diameter of the feeding end of the volute body is much larger than the inner diameter of the discharging end.

3. The drum ball mill evaporator of claim 1, wherein: The discharging device comprises a receiving hopper which is arranged through the solid material outlet, and an air blower is arranged at the discharging end of the receiving hopper.

4. The drum ball mill evaporator of claim 1, wherein: The feeding device comprises a feeding pipe which is coaxially arranged with the hollow shaft, the feeding pipe is arranged in the volute body in an upward extending manner and the discharging port of the feeding pipe is arranged in a downward spraying manner.

5. The drum ball mill evaporator of claim 1, wherein: The bottom of the heat insulation shell is connected with shell support legs, the shell support legs are gradually arranged in a height-increasing manner along the material conveying direction of the feed conveying spiral plate, the volute driving device comprises a pressure rotary reducer, and the pressure rotary reducer is arranged on the shell support leg at the low end.

6. The drum ball mill evaporator of claim 5, wherein: The hollow shaft which is sleeved with the steam feeding pipe is arranged on the shell support leg through a fixing cylinder, the hollow shaft is rotationally matched with the fixing cylinder through a rotary support, and mechanical seal members are respectively arranged between the steam feeding pipe and the fixing cylinder, between the heat insulation shell and the hollow shaft, and between the feeding device and the hollow shaft.

7. The drum ball mill evaporator of claim 1, wherein: The heat insulation shell is a detachable and assembled shell which is sealingly connected at the assembled position, the heat insulation shell and the volute body have corresponding shapes, and the grinding bodies are provided as spheres.

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