CN220831855U - Rotary digester system - Google Patents

Abstract

The application discloses a rotary type digester system, which is characterized in that a water wetting pipe and a steam pipe are respectively added into a digester by the rotary type digester system, materials in the digester can be processed at high temperature, a heat energy recovery unit is further arranged for efficiently recovering the high-temperature steam in the digester, the heat energy recovery unit comprises a steam exhaust pipe, a one-way valve, an ejector, a water tank and a heat exchange component, the steam exhaust pipe is communicated with the water wetting pipe, the high-temperature steam in the digester can be introduced into the ejector and sprayed out towards the water tank, a medium in the water tank is heated, the heat exchange component and the water tank form a circulation loop, the heat exchange component can be communicated with external equipment, the heat exchange component can heat the external equipment or the medium by carrying out heat exchange on the heated medium in the water tank, the one-way valve on the steam exhaust pipe can prevent the medium from reversely flowing in the steam exhaust pipe, and the stable operation of the system can be ensured.

Description

Rotary digester system

Technical Field

The application relates to the field of soy sauce production equipment, in particular to a rotary digester system.

Background

In soy sauce production, NK tanks (also known as rotary digesters) are often used to store the material when it is required to be cooked at high temperature.

In the soy sauce production process, the lack of efficient heat energy recovery equipment causes the energy waste, and simultaneously many production processes of soy sauce need heat energy to heat again.

Disclosure of utility model

The embodiment of the application provides a rotary digester system, which can effectively recover heat energy and save energy.

The application provides a rotary digester system, comprising:

the digester can be arranged around the horizontal rotation type;

The pipeline unit comprises a water wetting pipe and a steam pipe, and the water wetting pipe is sleeved on the periphery of the steam pipe; one end of the moistening pipe is communicated with the boiling pot, and the other end of the moistening pipe is communicated with an external moistening water source; one end of the steam pipe is communicated with the boiling pot, and the other end of the steam pipe is communicated with an external steam source;

The heat energy recovery unit comprises a steam exhaust pipe, a one-way valve, an ejector, a water tank and a heat exchange assembly; one end of the steam exhaust pipe is communicated with the water wetting pipe, the other end of the steam exhaust pipe is communicated with the inlet of the ejector, the outlet of the ejector is correspondingly arranged with the water tank, the one-way valve is arranged on the steam exhaust pipe, and the one-way valve allows the medium to flow unidirectionally from the water wetting pipe to the ejector;

The heat exchange assembly comprises a heat exchanger, a heat exchange pipeline and a first driving unit; the heat exchanger is communicated with the water tank through a heat exchange pipeline to form a circulation loop, and the first driving unit is arranged on the heat exchange pipeline and used for driving a medium in the heat exchange pipeline to flow in the circulation loop.

The rotary digester system of the application has at least the following beneficial effects:

In the rotary type digester system provided by the embodiment of the application, the moistening water and the high-temperature steam are respectively added into the digester through the moistening water pipe and the steam pipe, so that the materials in the digester can be processed at high temperature, the heat energy recovery unit is further arranged to efficiently recover the high-temperature steam in the digester, the heat energy recovery unit comprises the steam exhaust pipe, the one-way valve, the ejector, the water tank and the heat exchange component, the steam exhaust pipe is communicated with the moistening water pipe, the high-temperature steam in the digester can be introduced into the ejector and sprayed out towards the water tank, the medium in the water tank is heated, the heat exchange component and the water tank form a circulation loop, the heat exchange component can be communicated with external equipment or external medium, the heat exchange component can heat the external equipment or medium through heat, the one-way valve on the steam exhaust pipe can prevent the medium from reversely circulating in the steam exhaust pipe, and the stable operation of the system can be ensured.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic diagram of a rotary digester system in accordance with some embodiments of the present application;

The reference numerals are as follows:

1. A digester; 11. a first temperature detecting element; 12. a second temperature detecting element; 13. a rotation counter; 14. a negative pressure vacuum gauge; 15. a pressure detecting element;

2. A pipeline unit; 21. a wetting tube; 211. a second automatic valve; 212. a second manual valve; 22. a steam pipe; 221. a third automatic valve; 222. a third manual valve; 23. breaking a vacuum tube; 231. a fourth automatic valve; 232. a fourth manual valve;

3. A heat energy recovery unit; 31. a steam exhaust pipe; 311. a first automatic valve; 312. a first manual valve; 32. a one-way valve; 33. an ejector; 34. a water tank; 341. a first cavity; 342. a second cavity; 35. a heat exchange assembly; 351. a heat exchanger; 352. a heat exchange pipeline; 3521. a first heat exchange line; 3522. a second heat exchange line; 353. a first driving unit; 36. a return pipe; 361. a stop valve; 37. and a second driving unit.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

In order to facilitate the explanation of the technical solution of the present embodiment, first, some cases in the technical field will be explained.

In the soy sauce production process, materials in the digester need to be heated, and after the inventor of the present application studied the existing rotary digester, problems such as direct discharge of high temperature steam in the existing digester are found, which causes problems that a corresponding structure needs to be provided to ensure the discharge of steam and interference is caused to the environment and on-site equipment conditions.

In order to solve the problems, the embodiment of the application provides a rotary type digester system, which can recycle high-temperature steam in a digester and can solve the heating requirements of other devices on site.

As shown in fig. 1, the rotary digester system according to the embodiment of the present application includes a digester 1, a pipe unit 2, and a heat recovery unit 3;

The digester 1 can be arranged in a horizontal rotary mode around the horizontal rotary mode;

The pipeline unit 2 comprises a water wetting pipe 21 and a steam pipe 22, and the water wetting pipe 21 is sleeved on the periphery of the steam pipe 22; one end of the moistening pipe 21 is communicated with the digester 1, and the other end is communicated with an external moistening water source; one end of the steam pipe 22 is communicated with the digester 1, and the other end is communicated with an external steam source;

The heat energy recovery unit 3 comprises a steam exhaust pipe 31, a one-way valve 32, an ejector 33, a water tank 34 and a heat exchange assembly 35; one end of the steam exhaust pipe 31 is communicated with the water wetting pipe 21, the other end of the steam exhaust pipe is communicated with the inlet of the ejector 33, the outlet of the ejector 33 is arranged corresponding to the water tank 34, the one-way valve 32 is arranged on the steam exhaust pipe 31, and the one-way valve 32 allows medium to flow unidirectionally from the water wetting pipe 21 to the ejector 33;

The heat exchange assembly 35 includes a heat exchanger 351, a heat exchange line 352, and a first drive unit 353; the heat exchanger 351 is communicated with the water tank 34 through a heat exchange pipeline 352 to form a circulation loop, and the first driving unit 353 is arranged on the heat exchange pipeline 352 and is used for driving the medium in the heat exchange pipeline 352 to flow in the circulation loop.

In some embodiments, the cooking pot 1 is rotatably disposed through a rotation shaft, and the rotation shaft is horizontally disposed, and the rotation shaft is rotatably driven through a rotation shaft driving unit (e.g., a motor, etc.), so that the rotation shaft can drive the cooking pot 1 to rotate.

In some embodiments, the inner and outer sleeve of the water wetting pipe 21 and part of the steam pipe 22 are coaxially sleeved, the external water wetting source can input water into the cooking pot 1 through the water wetting pipe 21, wherein the water wetting flows into the cooking pot 1 through a gap between the inner peripheral wall of the water wetting pipe 21 and the outer peripheral wall of the steam pipe 22, an opening is arranged in the middle of the water wetting pipe 21, the steam pipe 22 extends into the interior of the water wetting pipe 21 from the opening, one end of the steam pipe 22 extends into the cooking pot 1, and a spray head is arranged at the end of the steam pipe 22 positioned in the cooking pot 1, so that high-temperature steam can be uniformly sprayed.

In some embodiments, an external source of water refers to a device that can provide water to the water tube 21, and similarly, an external source of steam refers to a device that can provide high temperature steam to the steam tube 22.

In some embodiments, one-way valve 32 may allow one-way communication of steam from wetting tube 21 to eductor 33, where one-way valve 32 may be a check valve in some cases.

In some embodiments, the water tank 34 is disposed below the outlet of the injector 33, and the outlet of the injector 33 can spray high temperature steam into the water tank 34 (medium in the water tank, such as water, etc.), and the structure of the injector 33 can be referred to as an existing jet injector.

In some embodiments, the first drive unit 353 includes a pump or other fluid delivery capability, and the first drive unit 353 circulates the heated water within the water tank 34 through the heat exchange line 352 into the heat exchanger 351 (e.g., a tubular heat exchanger).

In some embodiments, the external brine processing device may form a loop with the heat exchanger 351 through a brine pipeline, for example, the brine pipeline includes a low-temperature brine pipeline and a high-temperature brine pipeline, both ends of the low-temperature brine pipeline and the high-temperature brine pipeline are respectively communicated with the brine processing device and the heat exchanger 351, and after brine enters the heat exchanger 351 from the low-temperature brine pipeline and exchanges heat with a medium (steam heated water) in the heat exchanger 351, brine (heated brine) flows back to the brine processing device from the high-temperature brine pipeline.

In the rotary digester system of the embodiment of the application, the moistening water pipe 21 and the steam pipe 22 are respectively added into the digester 1 to process materials in the digester 1 at high temperature, the heat recovery unit 3 is further arranged to efficiently recover the high-temperature steam in the digester 1, the heat recovery unit 3 comprises the steam exhaust pipe 31, the one-way valve 32, the ejector 33, the water tank 34 and the heat exchange component 35, the steam exhaust pipe 31 is communicated with the moistening water pipe 21, the high-temperature steam in the digester 1 can be introduced into the ejector 33 and sprayed out towards the water tank 34, the medium in the water tank 34 is heated, the heat exchange component 35 and the water tank 34 form a circulation loop, the heat exchange component 35 can be communicated with external equipment, the heat exchange component 35 can heat the external equipment or the medium by carrying out heat exchange on the heated medium in the water tank 34, the purpose of heat recovery can be achieved, the one-way valve 32 on the steam exhaust pipe 31 can avoid reverse circulation of the medium in the steam exhaust pipe 31, and stable operation of the system can be ensured.

Optionally, the steam exhaust pipe 31 is sequentially provided with a first automatic valve 311 and a first manual valve 312, and the first automatic valve 311 and the first manual valve 312 are located between the check valve 32 and the water wetting pipe 21.

In some embodiments, one end of the steam exhaust pipe 31 is connected to an end of the moisture pipe 21 facing away from the digester 1, the other end of the steam exhaust pipe 31 is connected to an inlet of the ejector 33, and the check valve 32 is provided on the steam exhaust pipe 31 (specifically, at a position near the ejector 33).

In some embodiments, the first automatic valve 311 and the first manual valve 312 are both disposed on the steam exhaust pipe 31 and are both located between one end of the steam exhaust pipe 31 and the check valve 32, and the first automatic valve 311 and the first manual valve 312 can both control the conduction of the steam exhaust pipe 31.

In the embodiment of the application, the circulation of steam in the steam exhaust pipe 31 can be controlled by arranging the first automatic valve 311 and the first manual valve 312, and the normal operation of the system under special working conditions can be ensured by a redundant design.

The inside of the water tank 34 is provided with a first cavity 341 and a second cavity 342;

The heat exchange pipeline 352 comprises a first heat exchange pipeline 3521 and a second heat exchange pipeline 3522, and two ends of the first heat exchange pipeline 3521 are respectively communicated with the heat exchanger 351 and the first cavity 341; two ends of the second heat exchange pipeline 3522 are respectively communicated with the heat exchanger 351 and the second cavity 342; the ejector 33 of the heat recovery unit 3 is provided corresponding to the first cavity 341.

In some embodiments, the inside of the water tank 34 is vertically provided with a partition plate, which divides the inside of the water tank 34 into a first cavity 341 and a second cavity 342 on the left and right, the first cavity 341 is located right below the injector 33, and a predetermined distance is provided between the top of the first cavity 341 and the outlet of the injector 33, wherein the injector 33 is slidably disposed up and down by a slide rail mechanism (not shown), so that the predetermined distance from the first cavity 341 can be adjusted, the predetermined distance being adjustable for the purpose of facilitating adjustment of the amount of heat to be crashed into the first cavity 341, it being understood that since the first cavity 341 is directly below the injector 33, the medium temperature in the first cavity 341 is generally higher than the medium temperature in the second cavity 342.

In some embodiments, the sliding rail mechanism includes a sliding rail and a sliding block, the sliding rail is vertically and fixedly arranged, the sliding block is slidably arranged on the sliding rail, the injector 33 is fixed on the sliding block, and the injector 33 can be driven to move up and down by the sliding block to slide up and down.

In some embodiments, the partition is provided with a valve structure that can achieve communication between the first cavity 341 and the second cavity 342 by adjusting the opening and closing angle thereof.

In some embodiments, the heat exchanger 351 is respectively connected to the first cavity 341 and the second cavity 342 through a first heat exchange pipeline 3521 and a second heat exchange pipeline 3522, the first driving unit 353 is disposed on the first heat exchange pipeline 3521, the medium in the first cavity 341 is conveyed into the heat exchanger 351 through the first driving unit 353, and the medium after heat exchange in the heat exchanger 351 flows back into the second cavity 342 through the second heat exchange pipeline 3522 after the temperature of the medium after heat exchange is completed is reduced.

In some embodiments, a valve structure is disposed on first heat exchange line 3521, the valve structure controlling the flow of media.

In the embodiment of the application, the water tank 34 is divided to facilitate the separation of the high-temperature medium (heated high-temperature water) and the low-temperature medium, and then the medium is driven to circularly flow by the first driving unit 353, so that the high-temperature medium can be effectively utilized.

Optionally, the heat energy recovery unit 3 further includes a return pipe 36 and a second driving unit 37, both ends of the return pipe 36 are respectively communicated with the tank 34 and the injector 33, and the second driving unit 37 is provided on the return pipe 36.

In some embodiments, one end of return tube 36 communicates at the bottom of second cavity 342 of tank 34 and the other end of return tube 36 communicates to the interior of injector 33.

In some embodiments, the second drive unit 37 comprises a pump or other fluid delivery capable mechanism, the second drive unit 37 being arranged on the return tube 36, the second drive unit 37 being capable of delivering medium in the second cavity 342 into the ejector 33.

In the embodiment of the present application, the second driving unit 37 is started only when the pressure in the cooking pot 1 reaches a certain threshold, for example, when the pressure in the cooking pot 1 is lower than 0.02Mpa, the flow rate of steam to the ejector 33 may be reduced, at this time, the second driving unit 37 is started, the low-temperature medium is led back into the ejector 33, and a negative pressure state is produced in the ejector 33, so that the steam in the cooking pot 1 can be continuously sucked, and the heat energy of the cooking pot 1 can be efficiently utilized.

Optionally, the return pipe 36 is provided with a shut-off valve 361.

In some embodiments, the number of stop valves 361 may be plural, for example, in the embodiment of the present application, two stop valves 361 are provided on the return pipe 36, and the two stop valves 361 are respectively located at the inlet and outlet positions of the second driving unit 37, and the stop valves 361 may control the medium flowing in the return pipe 36.

In some embodiments, the stop valve 361 is configured to adjust an opening and closing angle, so as to control a flow rate of the medium.

In some embodiments, a pressure gauge is also provided on the return line 36, which monitors the internal pressure of the return line 36.

In the embodiment of the present application, the flow of the medium can be controlled by providing the stop valve 361, and the medium can be opened again as required, for example, in the early stage of heat energy utilization, the stop valve 361 is in a closed state, at this time, because the pressure in the digester 1 is relatively high, the negative pressure state does not need to be produced in the injector 33, and when the pressure in the digester 1 is lower than a certain threshold value, the stop valve 361 is turned on, and the negative pressure state is produced.

Optionally, the first temperature detecting element 11 is provided inside the cooking pot 1, and the second temperature detecting element 12 is provided on the outer peripheral wall of the cooking pot 1.

In some embodiments, the first temperature detecting element 11 is disposed within the digester 1 and is located at a middle position of the digester 1.

In some embodiments, the second temperature detecting element 12 is provided at a top position of the digester 1.

In the embodiment of the application, the temperature detection elements are arranged inside and outside the cooker 1, so that the temperature parameter of the cooker 1 can be monitored in real time, and the external control unit can conveniently execute corresponding operation or process monitoring according to the temperature parameter.

Optionally, a revolution counter 13 is provided on the outer peripheral wall of the digester 1 for obtaining the number of revolutions of the digester 1.

In some embodiments, the revolution counter 13 may acquire a revolution frequency of the digester 1 when rotating.

In the industry, the digester 1 is usually rotated forward or reversely through time, the number of turns cannot be counted, and the mixing effect is unstable.

Optionally, a negative pressure vacuum gauge 14 and a pressure detecting element 15 are arranged on the outer side of the wetting tube 21 and communicated with the interior of the wetting tube 21.

In some embodiments, the negative pressure vacuum gauge 14 is disposed on the outer circumferential wall of the water wetting tube 21 and communicates with the inside of the water wetting tube 21, and the negative pressure vacuum gauge 14 can detect the negative pressure level inside the water wetting tube 21 because the water wetting tube 21 communicates with the digester 1, i.e., can detect the negative pressure level inside the digester 1.

In some embodiments, pressure sensing element 15 may sense the internal pressure of wetting tube 21.

In the embodiment of the application, by arranging the temperature detection element, the pressure detection element 15 and the rotary counter 13, automatic control can be realized, for example, parameters monitored by the temperature detection element, the pressure detection element 15 and the rotary counter 13 are output to an external control unit, and the external control unit executes corresponding process operation according to the parameters, so that the aim of accurate control can be achieved, and the uncertainty of manual operation is avoided.

Optionally, a second automatic valve 211 and a second manual valve 212 are arranged in series between the other end of the wetting tube 21 and the external wetting source; a third automatic valve 221 and a third manual valve 222 are provided in series between the other end of the steam pipe 22 and the external steam source.

In some embodiments, a second automatic valve 211 and a second manual valve 212 are sequentially disposed on one end of the wetting tube 21 facing away from the digester 1, and the second automatic valve 211 and the second manual valve 212 can control the conduction state of the wetting tube 21.

In some embodiments, the steam pipe 22 is sequentially provided with a third automatic valve 221 and a third manual valve 222, and the third automatic valve 221 and the third manual valve 222 can control the conducting state of the steam pipe 22.

In the embodiment of the application, the redundant design of the automatic valve and the manual valve can ensure the stable operation of the system under the special working condition, and the system of the embodiment of the application is provided with the automatic valve and the manual valve at a plurality of positions, so that the system of the embodiment of the application has higher stability.

Optionally, the steam pipe 22 is provided with a vacuum breaking pipe 23 communicated with the inside of the steam pipe, and the vacuum breaking pipe 23 is sequentially provided with a fourth automatic valve 231 and a fourth manual valve 232.

In some embodiments, one end of the broken vacuum tube 23 is connected to the wetting tube 21, and the other end of the broken vacuum tube 23 is connected to the outside or other equipment.

In some embodiments, the fourth automatic valve 231 and the fourth manual valve 232 are both disposed on the broken vacuum tube 23, and both can control the conducting state of the broken vacuum tube 23.

In the embodiment of the present application, the vacuum state of the digester 1 can be broken by providing the breaking vacuum pipe 23 and the fourth automatic valve 231 and the fourth manual valve 232, for example, when the second driving unit 37 continuously creates the vacuum state inside the ejector 33, the vapor in the digester 1 is continuously sucked into the ejector 33, so that the pressure of the digester 1 is gradually reduced, and a negative pressure may be formed in the digester 1, so that the breaking vacuum pipe 23 is provided to break the vacuum state of the digester 1 in a later period of heat energy utilization or after the heat energy utilization is completed.

The working principle of the rotary digester system according to the embodiment of the application is as follows, as shown in fig. 1:

The external water-moistening source adds water-moistening into the cooking pot 1 through the water-moistening pipe 21;

The high-temperature steam enters the cooking pot 1 from the steam pipe 22 to cook the materials in the cooking pot 1, and during the period, the temperature detection element, the pressure detection element and the rotation counter 13 monitor related parameters of the cooking pot 1 in real time and feed back the parameters to an external control unit, and the external control unit can control the rotary cooking pot to perform corresponding operations, such as controlling the rotation of the cooking pot 1;

After the material in the digester 1 is cooked, the high-temperature steam in the digester 1 is recycled, and the method specifically comprises the following steps:

The first automatic valve 311 and the first manual valve 312 on the steam exhaust pipe 31 are opened, high-temperature steam in the cooking pot 1 flows into the ejector 33 in one way through the steam exhaust pipe 31 and is ejected from the outlet of the ejector 33 towards the medium (water) in the water tank 34, after the medium in the water tank 34 (the first cavity 341) is heated by the high-temperature steam ejected by the ejector 33, the first driving unit 353 conveys the medium into the heat exchanger 351, the heated medium exchanges heat with the brine flowing into the heat exchanger 351, so that the brine can be heated, and after the brine exchanges heat, the temperature of the medium drops and returns to the water tank 34 (the second cavity 342);

Since the high temperature steam in the digester 1 is continuously transferred to the ejector 33, the pressure in the digester 1 is gradually reduced, the transfer rate of the steam is slowly reduced, when the pressure in the digester 1 is lower than a certain threshold (the threshold can be set according to practical situations, for example, lower than 0.02 Mpa), the second driving unit 37 is turned on, the medium in the water tank 34 (the second cavity 342) is continuously input into the ejector 33 and ejected from the outlet of the ejector 33 by the second driving unit 37, a negative pressure or a state close to the negative pressure is formed in the ejector 33, and the residual steam in the digester 1 can be continuously sucked into the ejector 33 and ejected from the outlet of the ejector 33 due to the pressure difference;

After the second driving unit 37 is operated for a certain time, the high temperature steam in the cooking pot 1 is completely recovered, and at this time, the pressure in the cooking pot 1 is low, and may approach to a vacuum state, so that the fourth automatic valve 231 and the fourth manual valve 232 on the vacuum breaking pipe 23 are opened, so that the cooking pot 1 is communicated to the outside, and the vacuum state of the cooking pot 1 is broken.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and they should be included in the scope of the present application.

Claims (10)

1. A rotary digester system, comprising:

the digester (1) can be horizontally and rotatably arranged around the axis;

The pipeline unit (2) comprises a water wetting pipe (21) and a steam pipe (22), and the water wetting pipe (21) is sleeved on the periphery of the steam pipe (22); one end of the moistening pipe (21) is communicated with the digester (1), and the other end is communicated with an external moistening water source; one end of the steam pipe (22) is communicated with the digester (1), and the other end is communicated with an external steam source;

the heat energy recovery unit (3) comprises a steam exhaust pipe (31), a one-way valve (32), an ejector (33), a water tank (34) and a heat exchange assembly (35); one end of the steam exhaust pipe (31) is communicated with the water wetting pipe (21), the other end of the steam exhaust pipe is communicated with the inlet of the ejector (33), the outlet of the ejector (33) is arranged corresponding to the water tank (34), the one-way valve (32) is arranged on the steam exhaust pipe (31), and the one-way valve (32) allows medium to flow unidirectionally from the water wetting pipe (21) to the ejector (33);

The heat exchange assembly (35) comprises a heat exchanger (351), a heat exchange pipeline (352) and a first driving unit (353); the heat exchanger (351) is communicated with the water tank (34) through a heat exchange pipeline (352) to form a circulation loop, and the first driving unit (353) is arranged on the heat exchange pipeline (352) and is used for driving a medium in the heat exchange pipeline (352) to flow in the circulation loop.

2. The rotary digester system according to claim 1, wherein the steam exhaust pipe (31) is provided with a first automatic valve (311) and a first manual valve (312) in sequence, the first automatic valve (311) and the first manual valve (312) being located between the one-way valve (32) and the water wetting pipe (21).

3. The rotary digester system according to claim 1, wherein the interior of the tank (34) is provided with a first cavity (341) and a second cavity (342),

The heat exchange pipeline (352) comprises a first heat exchange pipeline (3521) and a second heat exchange pipeline (3522), and two ends of the first heat exchange pipeline (3521) are respectively communicated with the heat exchanger (351) and the first cavity (341); two ends of the second heat exchange pipeline (3522) are respectively communicated with the heat exchanger (351) and the second cavity (342); the ejector (33) is provided in correspondence with the first cavity (341).

4. A rotary digester system according to any of claims 1-3, characterised in that the heat energy recovery unit (3) further comprises a return pipe (36) and a second drive unit (37), both ends of the return pipe (36) being in communication with the tank (34) and the ejector (33), respectively, the second drive unit (37) being arranged on the return pipe (36).

5. The rotary digester system according to claim 4, wherein the return line (36) is provided with a shut-off valve (361).

6. A rotary digester system according to claim 1, characterised in that the interior of the digester (1) is provided with a first temperature detection element (11) and the peripheral wall of the digester (1) is provided with a second temperature detection element (12).

7. A rotary digester system according to claim 1 or 6, characterised in that the peripheral wall of the digester (1) is provided with a rotation counter (13) for acquiring the number of rotations of the digester (1).

8. The rotary digester system according to claim 7, wherein the outside of the water tube (21) is provided with a negative pressure vacuum gauge (14) and a pressure detecting element (15) communicating with the interior of the water tube (21).

9. The rotary digester system according to claim 1, wherein a second automatic valve (211) and a second manual valve (212) are provided in series between the other end of the water tube (21) and the external water source;

A third automatic valve (221) and a third manual valve (222) which are connected in series are arranged between the other end of the steam pipe (22) and an external steam source.

10. The rotary digester system according to claim 9, wherein the steam pipe (22) is provided with a vacuum breaking pipe (23) communicating with the interior thereof, and the vacuum breaking pipe (23) is provided with a fourth automatic valve (231) and a fourth manual valve (232) in sequence.