CN116549989A - A spray drying energy recovery system for the preparation of sodium methoxide particles - Google Patents

Abstract

The invention discloses a spray drying energy recovery system for the preparation of sodium methoxide particles, which comprises a spray drying tower, a compressor, a falling film reboiler and an evaporator connected in sequence, and the output end of the falling film reboiler is connected with a cooling device. The output end of the cooler is connected with a methanol tank. The spray drying tower includes a main cylinder for drying materials, a sprayer for atomizing and spraying materials, and a feeding mechanism for discharging materials. heater. The invention overcomes the deficiencies of the prior art, has a reasonable design, and can simultaneously clean the inside of the tower during the drying process, effectively reducing the phenomenon of adhesion and accumulation when the solution is dried, thereby affecting the product quality, and has a high efficiency. Social use value and application prospect.

Description

A spray drying energy recovery system for the preparation of sodium methoxide particles

technical field

The invention relates to the technical field of preparation of sodium methoxide particles, in particular to a spray drying energy recovery system for preparation of sodium methoxide particles.

Background technique

The spray drying tower is a device used for drying biological pesticides, medicines, and food microorganisms. During the preparation of sodium methoxide particles, most of them are carried out in the form of spray drying, which needs to be carried out inside the spray drying tower. Through heat control, the formation of The sprayed sodium methoxide methanol solution was dried to obtain sodium methoxide particles.

In the existing production, when the sodium methoxide methanol solution is processed in the spray drying tower, a part of the material will adhere to the inner wall of the tower, which will affect the output of the product, and the long-term accumulation will have a negative impact on the service life of the tower body. Influence.

At present, a scraping structure is usually installed inside the tower body, and the attachments on the inner wall are scraped off through the contact of the rotating scraper with the inner wall of the tower. However, this type of scraping method consumes a lot of scraper and will damage the inner wall of the tower. If the damage is caused, the attachments will reattach to the scraper, so that a large amount of scrapings will be attached to the surface of the scraper, which directly affects the service life of the scraper.

In the conventional spray drying system, the drying gas used will have a large amount of heat loss, which cannot be effectively utilized, which increases the production cost. For this reason, the inventor designed and developed an energy recovery system capable of effectively cleaning the attachments on the inner wall of the drying tower, which can optimize the cleaning form of the attachments in the tower.

Contents of the invention

In order to achieve the above object, the present invention adopts the following technical solutions:

A spray drying energy recovery system for preparing sodium methoxide particles, comprising a spray drying tower, a compressor, a falling film reboiler and an evaporator connected in sequence, the output end of the falling film reboiler is connected with a cooler, and the cooler The output end is connected with a methanol tank;

The spray drying tower includes a main cylinder for drying materials, a sprayer for atomizing and spraying materials, and a feeding mechanism for discharging materials, and the feeding mechanism is connected with a heat exchanger through a pipeline;

The unloading mechanism is provided with a drive motor to drive its internal components to rotate, and the main cylinder is provided with a scraping mechanism for scraping off attachments, and the scraping mechanism includes a scraper in contact with the inner wall of the main cylinder , and a synchronous ring for fixing the scraper, and the sprayer is provided with a hanging frame for moving the synchronous ring.

Preferably, the scraper is provided with a cleaning assembly for scraping off its surface attachments, the cleaning assembly includes a cleaning mechanism for removing attachments on the scraper, and a reciprocating up and down adjustment mechanism for the cleaning mechanism lifting block;

The cleaning mechanism includes a mounting frame connected to the lifting sleeve block through a connecting rod. The two sides of the mounting frame are respectively provided with cleaning discs that are in contact with the surface of the scraper, and are used to rotate and scrape off the surface of the scraper. For the scraper of the material, the mounting frame is also provided with a spur gear for driving the scraper and the cleaning disc to rotate.

Preferably, the lifting block is provided with a reciprocating screw for rotating and raising its height position, and the top of the reciprocating screw is connected with the bottom of the steam pipe through a bearing.

Preferably, the bottom of the inner cavity of the main cylinder is provided with a rotating mechanism for rotating the scraper, the rotating mechanism includes a connecting shaft fixed at the bottom end of the reciprocating screw, a driving gear is fixed on the connecting shaft, and the driving gear is meshed and spliced The driven gear, the connecting shaft is also movably sleeved with a support frame fixed on the inner wall of the main cylinder, and the driven gear is fixed on the top surface of the support frame through the rotating shaft.

Preferably, the feeding mechanism includes a collecting pipe communicating with the bottom end of the main cylinder, and a conduit for conveying the material to the heat exchanger;

The unloading mechanism also includes a uniaxial auger installed in the collecting pipe, and the top of the uniaxial auger is fixedly connected with the bottom end of the connecting shaft.

Preferably, the rotating mechanism further includes an internal gear ring movably mounted on the bottom of the inner cavity of the main cylinder, and the top surface of the internal gear ring is used to fix the bottom end of the scraper.

Preferably, the scraping mechanism further includes a rack for engaging the spur gear, and a guide threading rod for fitting the installation frame.

Preferably, the number of scrapers is three, and the three scrapers are evenly fixed to the bottom end of the synchronous ring in the circumferential direction.

Preferably, the internal gear ring is provided with a cleaning strip for scraping off the top surface of the driving gear and the top surface of the driven gear, and the end of the cleaning strip is socketed with the bottom end bearing of the reciprocating screw.

Preferably, the spray drying tower further includes a steam pipe connected to the inside of the main cylinder, the steam pipe communicates with the output end of the evaporator, and the main cylinder is provided with a gas phase pipe.

Compared with prior art, the beneficial effect of the present invention is:

1. Through the setting of the scraping mechanism, the scraping mechanism can be driven to rotate inside the main cylinder by using the mutual cooperation between the blanking mechanism, the driving motor and the rotating mechanism, so that the scraping plate can touch the inner wall of the main cylinder. Effective scraping of attachments, reducing the internal space occupancy of conventional scraping mechanisms.

2. Through the setting of the rotating mechanism, the scraping mechanism can be rotated and driven in conjunction with the drive motor and the feeding mechanism, and the feeding of the spray drying tower can be operated synchronously while following the scraping process.

3. Through the setting of the cleaning component, the reciprocating screw is used to increase the height of the cleaning component, and the scraping mechanism matches the spur gear, so that the cleaning disc and the scraping piece can clean the attachments on the surface of the scraping plate. To avoid scraping, the attachments on the inner wall of the main cylinder are reattached to the scraper.

4. The cleaning mechanism is used to clean the scraper plate. Compared with the sliding sleeve type cleaning method, the cleaning force requirement is small, and the high-speed and small-area attachment scraping method can avoid the cleaning disc and The scraper blade causes damage to the surface of the scraper, which effectively improves the service life of the scraper.

5. Through the setting of compressor, falling film reboiler, cooler and evaporator, hot nitrogen is used to realize energy recovery and utilization, and enter the drying tower through the bottom of the drying tower to form a cycle, saving a certain amount of energy consumption.

To sum up, the present invention overcomes the deficiencies of the prior art, and has a reasonable design. It can simultaneously perform cleaning operations on the inside of the tower during the drying process, effectively reducing the phenomenon of adhesion and accumulation when the solution is dried, thereby affecting the quality of the product. High social use value and application prospect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a system flow chart of the present invention;

Fig. 2 is the structural representation of spray drying tower among the present invention;

Fig. 3 is the structural front view of spray drying tower among the present invention;

Fig. 4 is a schematic cross-sectional view of the structure at A-A in Fig. 3;

Fig. 5 is a schematic diagram of the internal structure of the present invention;

Fig. 6 is a schematic partial sectional view of the overall structure of the present invention;

Fig. 7 is the explosion schematic diagram of spray drying tower in the present invention;

Fig. 8 is a schematic diagram of the structural splicing of the scraping mechanism and the cleaning assembly in the present invention;

Fig. 9 is a schematic diagram of the structural splicing of the rotating mechanism and the reciprocating screw in the present invention;

Fig. 10 is a schematic structural view of the cleaning assembly in the present invention;

Figure 11 is an enlarged view of the local structure at B in Figure 10;

Fig. 12 is a schematic diagram of the structural splicing of the cleaning component and the scraping mechanism in the present invention;

FIG. 13 is an enlarged view of the local structure at point C in FIG. 12 .

In the figure: 1, spray drying tower; 101, main cylinder; 102, feeding mechanism; 1021, collecting pipe; 1022, conduit; 1023, single-axis auger; 103, sprayer; 104, steam pipe; Tube; 2. Drive motor; 3. Scraper mechanism; 31. Scraper plate; 32. Synchronization ring; 33. Rack; 34. Guide rod; 4. Hanging frame; 5. Cleaning component; 51. Cleaning mechanism ; 72. Driving gear; 73. Driven gear; 74. Internal gear ring; 75. Cleaning bar; 8. Support frame; 9. Heat exchanger; 10. Compressor; 11. Falling film reboiler; 12. Cooling device; 13, methanol tank; 14, evaporator.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

With reference to Fig. 1-13, a kind of spray drying energy recovery system for the preparation of sodium methoxide particles comprises a spray drying tower 1, a compressor 10, a falling film reboiler 11 and an evaporator 14 connected successively, and the falling film reboiler 11 outputs The end is connected with a cooler 12, and the output end of the cooler 12 is connected with a methanol tank 13;

The spray drying tower 1 includes a main cylinder 101 for drying materials, a sprayer 103 for atomizing and spraying materials, and a feeding mechanism 102 for discharging materials. The feeding mechanism 102 is connected to a heat exchanger 9 through a pipeline;

The unloading mechanism 102 is provided with a drive motor 2 that drives its internal components to rotate. The main cylinder 101 is provided with a scraper mechanism 3 for scraping off attachments. The scraper mechanism 3 includes a scraper that contacts the inner wall of the main cylinder 101. plate 31, and the synchronous ring 32 for fixing the scraper plate 31, and the sprayer 103 is provided with a hanger 4 for the movable sleeve of the synchronous ring 32.

Specifically, the scraper 31 is provided with a cleaning assembly 5 for scraping off its surface attachments. The cleaning assembly 5 includes a cleaning mechanism 51 for removing the surface attachments of the scraper 31, and allows the cleaning mechanism 51 to reciprocate up and down. Adjusted lifting block 52;

The cleaning mechanism 51 includes a mounting frame 511 connected to the lifting block 52 through a connecting rod 521. The two sides of the mounting frame 511 are respectively provided with cleaning discs 513 that are in contact with the surface of the scraper plate 31, and are used to rotate and scrape off the scraping material. The scraper 514 of the attachment on the surface of the plate 31 is also provided with a spur gear 512 for driving the scraper 514 and the cleaning disc 513 to rotate in the mounting frame 511. Through the setting of the cleaning mechanism 51, the mounting frame 511 and the lifting sleeve The block 52 drives the cleaning disk 513 and the scraper 514 to move up and down, and through the engagement between the rack 33 and the spur gear 512, the surface attachments of the cleaning disk 513 and the scraper 514 on the scraper 31 Carrying out rotary cleaning, compared with the sliding sleeve cleaning method, requires less cleaning force, and the high-speed, small-area attachment scraping method can prevent the cleaning disc 513 from causing damage to both sides of the rack 33 , and can prevent the scraper 514 from causing damage to the surface of the scraper 31 , effectively improving the service life of the scraper 31 and the rack 33 .

Specifically, the lifting sleeve 52 is provided with a reciprocating screw 6 for rotating and raising its height position, the top of the reciprocating screw 6 is connected with the bottom of the steam pipe 104 through a bearing, and the reciprocating screw 6 is provided with a driving lifting sleeve 52 to reciprocate up and down. The two-way threaded groove of motion can not change the rotation direction of the reciprocating screw 6 while allowing the lifting sleeve block 52 to perform the conversion of the up and down movement position when the lifting sleeve 52 is at the highest point or the lowest point of the reciprocating screw 6 .

Specifically, the bottom of the inner cavity of the main cylinder 101 is provided with a rotating mechanism 7 for rotating the scraper 31. The rotating mechanism 7 includes a connecting shaft 71 fixed on the bottom end of the reciprocating screw 6, and a driving gear 72 is fixed on the connecting shaft 71, and is connected with The driving gear 72 is meshed with the driven gear 73 that is spliced. The connecting shaft 71 is also movably sleeved with a support frame 8 fixed on the inner wall of the main cylinder 101. The driven gear 73 is fixed on the top surface of the support frame 8 through a rotating shaft. The setting of the gear 72 and the driven gear 73 can allow the rotational force of the connecting shaft 71 to be transmitted to the inner gear ring 74, so that the inner gear ring 74 can drive the scraper 31 to surround the reciprocating screw 6 in the main cylinder 101 The axis of rotation makes the scraper 31 effectively scrape off the attachments on the inner wall of the main cylinder 101 .

Specifically, the feeding mechanism 102 includes a collecting pipe 1021 communicating with the bottom end of the main cylinder 101, and a conduit 1022 for transporting materials to the heat exchanger 9;

The unloading mechanism 102 also includes a uniaxial auger 1023 installed in the collecting pipe 1021, the top of the uniaxial auger 1023 is fixedly connected with the bottom end of the connecting shaft 71, and the setting of the unloading mechanism 102 is convenient in the main cylinder 101. In the process of sodium methoxide solid blanking, to avoid the clogging of the blanking, according to the actual use requirements, the speed of the blanking is controlled by adjusting the rotation speed of the single-axis auger 1023.

Specifically, the rotating mechanism 7 also includes an internal gear ring 74 movably erected on the bottom of the inner cavity of the main cylinder 101. The top surface of the internal gear ring 74 is used to fix the bottom end of the scraper 31. The internal gear ring 74 and the synchronous The rings 32 respectively fix the bottom end and the top end of the scraper plates 31 , so that the three scraper plates 31 can stably contact the inner wall of the main cylinder 101 .

Specifically, the scraping mechanism 3 also includes a rack 33 for engaging the spur gear 512, and a guide threading rod 34 for the sleeve mounting bracket 511. The setting of the rack 33 can lift the height of the cleaning mechanism 51 by the lifting block 52. At this time, through meshing and matching, the spur gear 512 is rotated, so that the cleaning disc 513 and the scraper 514 scrape off the surface attachments of the scraper 31, so as to prevent the scraper 31 from scraping the inner wall of the main cylinder 101. The attachments on the scraper plate 31 are re-attached to the scraper plate 31, and through the clamping form of the cleaning disc 513 and both sides of the rack 33, and the guiding effect between the guide rod 34 and the mounting frame 511, the cleaning disc 513 It can clean up the attachments on both sides of the rack 33, and let the scraper 514 remove the attachments on both sides of the scraper 31. Through the rotating and centrifugal action of the cleaning disc 513 and the scraper 514, it can effectively clean the The attachments on the surface are thrown off, which solves the problem that the attachments on the inner wall are scraped off by the scraper and the attachments are re-accumulated on the scraper.

Specifically, the number of scrapers 31 is three, and the three scrapers 31 are uniformly fixed on the bottom end of the synchronous ring 32 in the circumferential direction. With different usage conditions to achieve the best scraping effect.

Specifically, the inner gear ring 74 is provided with a cleaning strip 75 for scraping off the top surface of the driving gear 72 and the top surface of the driven gear 73. The bottom end of the cleaning strip 75 and the bottom bearing sleeve of the reciprocating screw Then, the cleaning strip 75 can follow the internal gear ring 74 to rotate, so that the cleaning strip 75 can remove the deposits accumulated on the top surface of the driving gear 72 and the driven gear 73 when passing through the top surface of the driving gear 72 and the driven gear 73. Carry out push-off operation, allow attachment can not pile up on driving gear 72 and driven gear 73 top surfaces.

Specifically, the spray drying tower 1 also includes a steam pipe 104 communicating with the inside of the main cylinder 101, the steam pipe 104 communicates with the output end of the evaporator 14, the main cylinder 101 is provided with a gas phase pipe 105, and the steam pipe 104 can communicate with the evaporator 14. The nitrogen gas that enters the inside of the main cylinder 101 from the evaporator 14 and has been heated up can be used to dry the sprayed materials. The steam pipe 104 is located on the top surface of the main cylinder 101 and is provided with an air spray head.

Example 2

With reference to Fig. 1, the difference between the present embodiment and embodiment 1 is that a kind of sodium methoxide particle preparation uses spray drying energy recovery method, comprises the following steps:

S1: After heating the sodium methoxide methanol solution with a solid content of 30-40% to 90-100°C, it is introduced into the main cylinder 101 through the steam pipe 104, and the methanol gas phase and nitrogen gas obtained after being treated in the spray drying tower 1 pass through the gas phase pipe 105 is imported into the compressor 10 for compression treatment, and the sodium methoxide solid obtained after the treatment of the spray drying tower 1 is discharged after the cooling treatment of the heat exchanger 9;

S2: Gas-phase methanol and nitrogen increase the latent heat of methanol after the compressor 10 boosts the pressure. This heat is used to heat the nitrogen in the falling film reboiler 11. After heat exchange, a large amount of gas-phase methanol is liquefied, and liquid-phase methanol and a small amount are liquefied. The gaseous methanol and nitrogen that have not been liquefied enter the cooler 12, so that the condensed methanol enters the methanol tank 13 for collection, and the nitrogen that has not undergone a phase change enters the falling film reboiler 11 again, so that the nitrogen is heated up again, and is heated by the falling film The upper pipeline of reboiler 11 leads into evaporator 14;

S3: After the heated nitrogen gas introduced into the evaporator 14 by the falling film reboiler 11 is heated by the steam inside the evaporator 14, the nitrogen gas is introduced into the spray drying tower 1 to act on the sodium methoxide methanol solution inside the spray drying tower 1 Drying treatment, so that the energy can be effectively recycled.

Working principle: In the present invention, the sodium methoxide methanol solution is added into the spray drying tower 1, and the solution is atomized by the steam pipe 104, and the heated nitrogen gas is passed into the main cylinder body 101 through the steam pipe 104, so that the nitrogen gas Dry the atomized solution, turn on the drive motor 2, and let the output shaft of the drive motor 2 drive the single-axis auger 1023 to rotate in the collection pipe 1021, so that the connecting shaft 71 and the reciprocating screw 6 can follow the single-axis auger synchronously. When the dragon 1023 rotates, the connecting shaft 71 will synchronously drive the driving gear 72 to rotate. Through the meshing between the driving gear 72, the driven gear 73 and the inner gear ring 74, the inner gear ring 74 can drive the scraping material in the main cylinder 101. The plate 31 rotates to allow the scraper 31 to scrape off the attachments on the inner wall of the main cylinder 101. Part of the scraped attachments will continue to adhere to the surface of the scraper 31, and the rotation of the reciprocating screw 6 will drive the lifting block 52 reciprocates up and down, so that the height position of the cleaning mechanism 51 on the scraper plate 31 moves synchronously with the height position of the lifting sleeve 52. When the cleaning mechanism 51 moves up and down, the spur gear 512 will mesh with the rack 33 Rotate, so that the cleaning disc 513 and the scraper blade 514 can carry out a rotary cleaning process on the surface of the scraper plate 31, and the attachments attached to the cleaning disc 513 and the scraper blade 514 will pass through the effect of centrifugal force Just throw it out.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In the present invention, terms such as "installation", "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it may be a fixed connection or It is a detachable connection, or integrated; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The control mode of the present invention is automatically controlled by a controller, and the control circuit of the controller can be realized through simple programming by those skilled in the art. The supply of power also belongs to common knowledge in this field, and the present invention is mainly used to protect mechanical devices , so the present invention will not explain the control method and circuit connection in detail.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (7)

1. a spray drying energy recovery system for the preparation of sodium methylate particles, comprising successively connected spray drying towers (1), compressors (10), falling film reboilers (11) and evaporators (14), characterized in that : the output end of the falling film reboiler (11) is communicated with a cooler (12), and the output end of the cooler (12) is communicated with a methanol tank (13); The spray drying tower (1) comprises a main cylinder (101) for drying materials, a sprayer (103) for atomizing and spraying materials, and a feeding mechanism (102) for discharging materials, and the feeding mechanism (102) passes through The pipeline is connected with a heat exchanger (9); The unloading mechanism (102) is provided with a drive motor (2) that drives its internal components to rotate, and the main cylinder (101) is provided with a scraper mechanism (3) for scraping off attachments. The feeding mechanism (3) includes a scraper (31) in contact with the inner wall of the main cylinder (101), and a synchronous ring (32) for fixing the scraper (31), and the sprayer (103) is provided with a The hanging frame (4) of movable sleeve synchronizing ring (32). 2. a kind of sodium methoxide particle preparation spray drying energy recovery system according to claim 1, is characterized in that: described scraper plate (31) is provided with the cleaning component (5) that is used for scraping off its surface attachment , the cleaning assembly (5) includes a cleaning mechanism (51) for removing the surface attachments of the scraper (31), and a lifting block (52) that allows the cleaning mechanism (51) to reciprocate up and down; The cleaning mechanism (51) includes a mounting frame (511) connected to the lifting block (52) through a connecting rod (521), and the two sides of the mounting frame (511) are respectively provided with The contact cleaning disc (513), and the scraper blade (514) used to rotate and scrape off the surface attachments of the scraper blade (31), the mounting bracket (511) is also provided with a scraper blade (514) for driving the scraper blade ( 514) and the spur gear (512) that the purge disc (513) rotates. 3. a kind of sodium methoxide granule preparation according to claim 2 is characterized in that: described lifting sleeve block (52) is provided with the reciprocating screw rod (6) that is used to rotate and promote its height position, The top of the reciprocating screw (6) is connected with the bottom of the steam pipe (104) through a bearing. 4. a kind of sodium methoxide particle preparation spray drying energy recovery system according to claim 3 is characterized in that: the bottom of the inner cavity of the main cylinder (101) is provided with a rotating mechanism for rotating the scraper (31) (7), the rotating mechanism (7) includes a connecting shaft (71) fixed on the bottom end of the reciprocating screw (6), the connecting shaft (71) is fixed with a driving gear (72), and engages with the driving gear (72) Spliced driven gear (73), the connecting shaft (71) is also movably sleeved with a support frame (8) fixed on the inner wall of the main cylinder (101), and the driven gear (73) is fixed by the rotating shaft on the top surface of the support frame (8). 5. a kind of sodium methylate granule preparation according to claim 4 is characterized in that: described blanking mechanism (102) comprises the collecting pipe ( 1021), and the conduit (1022) that the material is delivered to the heat exchanger (9); The unloading mechanism (102) also includes a uniaxial auger (1023) installed in the collecting pipe (1021), and the top of the uniaxial auger (1023) is fixedly connected with the bottom end of the connecting shaft (71). 6. The spray drying energy recovery system for preparing sodium methoxide particles according to claim 5, characterized in that: the rotating mechanism (7) also includes an internal gear that is movably erected on the bottom of the inner cavity of the main cylinder (101) Ring (74), the top surface of the internal gear ring (74) is used to fix the bottom of the scraper (31). 7. a kind of sodium methoxide particle preparation spray drying energy recovery system according to claim 6 is characterized in that: described scraper mechanism (3) also comprises the rack (33) that is used to engage spur gear (512) , and the guide piercing rod (34) for the suit mounting frame (511).