Raw material filtering device and evaporation concentration system

Abstract

The invention discloses a raw material filtering device and an evaporation concentration system.The raw material filtering device comprises a separation tank, detachable tank covers are arranged at the upper end and the lower end of the separation tank, a rotation device is rotationally arranged between the tank covers at the two ends, and a cylindrical filter screen is installed between the tank covers at the two ends and located outside the rotation device; a liquid inlet pipe is installed at the upper tank cover, a liquid inlet valve is installed at the liquid inlet pipe, the liquid inlet pipe corresponds to the inner side of the filter screen, a waste pipe and a liquid outlet pipe are arranged at the bottom of the lower tank cover, the waste pipe is located on the inner side of the filter screen, and the liquid outlet pipe is located on the outer side of the filter screen; a waste material valve is mounted at the waste material pipe; the equipment can heat raw materials by using heat generated during evaporation of the raw materials, and can also filter the raw materials.

Description

Technical Field

[0001] The invention relates to a raw material filtering device and an evaporation concentration system. Background Art

[0002] The steam concentration system relies on high-temperature steam to heat the raw materials, so that the water in the raw materials is evaporated and the raw materials are purified.

[0003] The steam concentration system in the prior art directly feeds the raw materials. In order to ensure the cleanliness of the raw materials and avoid clogging of the pipeline, the raw materials need to be filtered and then fed into the steam concentration system.

[0004] This external filtration method cannot fully utilize the steam concentration system.

[0005] To this end, we have designed a raw material filtering device and evaporation concentration system that can use the heat generated when the raw material evaporates to heat the raw material and can also filter the raw material. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a raw material filtering device and an evaporation concentration system which can utilize the heat generated when the raw material evaporates to heat the raw material and can also filter the raw material.

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] A raw material filtering device comprises a separation tank, wherein the upper and lower ends of the separation tank are provided with detachable tank covers, a rotating device is rotatably provided between the tank covers at both ends, a cylindrical filter screen is installed between the tank covers at both ends and located outside the rotating device, a liquid inlet pipe is installed at the upper tank cover, a liquid inlet valve is installed at the liquid inlet pipe, the liquid inlet pipe corresponds to the inner side of the filter screen, a waste pipe and a liquid outlet pipe are provided at the bottom position of the lower tank cover, the waste pipe is located on the inner side of the filter screen, the liquid outlet pipe is located on the outer side of the filter screen, and the waste pipe is located on the inner side of the filter screen. A waste valve is installed at the waste pipe, and a liquid outlet valve is installed at the liquid outlet pipe; a shell is coaxially arranged outside the separation tank, a steam chamber is formed between the shell and the separation tank, a steam inlet pipe is arranged near the bottom of the side of the shell, and a steam outlet pipe is arranged near the top of the side of the shell 4; the solution vapor evaporated in the evaporation tank enters the steam chamber through the steam inlet pipe, heats the separation tank and is discharged from the steam outlet pipe; a liquid drain pipe is obliquely arranged at the bottom of the shell, and a detachable pipe cover is arranged at the liquid drain pipe.

[0009] Preferably, the rotating device comprises a hollow rotating body, the upper and lower ends of the rotating body are coaxially provided with hollow shafts, a bearing and a shaft seal are cooperated between the hollow shaft and the tank cover, the shaft seal is sealed on the inner side of the bearing, a stirring unit is arranged on the outer side of the rotating body, the stirring unit is located on the inner side of the filter, a steam outlet box is fixed above the upper tank cover, a steam inlet box is arranged below the lower tank cover, the steam outlet box is connected with a first steam outlet pipe, a steam outlet valve is installed on the first steam outlet pipe, the upper hollow shaft is inserted into the steam outlet box, a first bearing and a first shaft seal are arranged between the hollow shaft and the steam outlet box, the first shaft seal is sealed on the inner side of the first bearing, the steam outlet box and the tank cover are connected A bracket is arranged between the covers; a first steam inlet pipe is arranged on the side of the steam inlet box, the first steam inlet pipe is connected to a boost pump, the lower end of the hollow shaft is inserted into the steam inlet box, a second bearing and a second shaft seal are matched between the hollow shaft and the steam inlet box, and the second shaft seal is sealed on the inner side of the second bearing; the steam inlet box is connected to a branch pipe, the branch pipe is connected to the steam inlet pipe, and a valve is arranged on the branch pipe; a heat insulation cover is installed on the outside of the outer shell, a drive motor is installed through the heat insulation cover, and a transmission mechanism is matched between the drive motor and the hollow shaft; the steam outlet pipe is connected to the first steam outlet pipe, and the connection position is located on the side of the steam outlet valve away from the steam outlet box; drain valves are arranged at the bottom of the steam inlet box and the steam outlet box.

[0010] Preferably, the transmission mechanism is a belt transmission mechanism or a gear transmission mechanism.

[0011] Preferably, a scraper device is provided at the bottom of the rotating body, and the scraper device cooperates with the waste pipe.

[0012] Preferably, the scraper device includes a V-shaped scraper and a connecting plate connected between the scraper and the rotating body, and the inner corner of the scraper is opposite to the waste pipe.

[0013] Preferably, the stirring unit includes a terminal, a part of the terminal is screwed into the rotating body, a sealing gasket is arranged between the terminal and the rotating body, a stepped hole is arranged at the axis of the terminal, the stepped hole includes a large diameter part, a small diameter part and a middle diameter part, a slider is slidably fitted at the large diameter part, an inner shaft is arranged at one end of the slider, the inner shaft is slidably fitted in the small diameter part, a sealing ring is embedded in the outer wall of the small diameter part, a seal is formed between the sealing ring and the small diameter part; an adjusting rod is threadedly connected to the end of the inner shaft away from the slider, the end of the adjusting rod is fitted with a limiting plate, a spring is sleeved on the adjusting rod, the spring acts between the limiting plate and the middle diameter part; under the rebound action of the spring, the slider slides into the large diameter part, and the sealing ring is located in the small diameter part; a stirring plate is arranged at the end of the slider away from the inner shaft.

[0014] Preferably, bristles are implanted at the end of the stirring plate away from the slider, and when the steam pressure in the rotating body increases, the inner axis moves outward in a direction away from the axis of the rotating body, and the bristles contact the inner wall of the filter.

[0015] Preferably, a slide plate is provided at the end of the inner shaft, and the inner shaft is loosely matched with the small diameter portion. The surface of the slide plate is provided with through holes for ejecting steam in an annular manner. When the spring is compressed and rebounded, the slide plate is always located in the small diameter portion. When the spring is compressed to the limit, the sealing ring slides into the large diameter portion. At this time, the high-temperature steam in the rotating body enters the inner side of the filter through the stepped holes.

[0016] Preferably, a jet hole is obliquely penetrated at the large diameter portion, a retaining ring is provided at the outer wall of the slider, and the end of the slider inserted into the large diameter portion is processed with a conical retreat surface, and when the retaining ring is limited to the outside of the terminal, a drainage channel is formed between the retreat surface and the large diameter portion and the small diameter portion.

[0017] An evaporation concentration system comprises the raw material filtering device.

[0018] The beneficial effects of the present invention are:

[0019] Advantage 1: This device centrifuges the raw materials so that the particles are intercepted on the inner side of the filter, and the filtered raw materials enter the evaporation and concentration system, thus preventing the particles in the raw materials from clogging the pipelines of the evaporation and concentration system.

[0020] Advantage 2: This device utilizes the raw material steam generated when the raw material is heated and evaporated by the evaporation concentration system. The raw material steam can heat this device, so that the raw material entering this device is preheated, and the preheating can reduce the temperature of the raw material steam, which is convenient for subsequent condensation.

[0021] Advantage three, this device utilizes raw material steam, and uses raw material steam to clean the filter at high temperature, thereby playing a role in cleaning the filter.

[0022] Advantage four: This equipment only needs to change the original liquid steam pipeline of the steam concentration system. It can be directly modified and applied to the existing steam concentration system, with lower upgrading cost and suitable for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 is a cross-sectional view of the present invention;

[0026] Figure 3 This is the enlarged view of point A;

[0027] Figure 4 This is an enlarged view of point B;

[0028] Figure 5 is a three-dimensional diagram of a scraper device;

[0029] Figure 6 is a cross-sectional view of the stirring unit;

[0030] Figure 7 This is the enlarged view of point C;

[0031] Figure 8 It is a schematic diagram of the inner shaft sliding out;

[0032] Fig. 9 This is a diagram of one implementation of a steam concentration system. DETAILED DESCRIPTION

[0033] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0034] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0035] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, in the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "disposed", "socketed", "connected", "through", "plugged" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Figure 1 and Figure 2 A raw material filtering device shown in the figure comprises a separation tank 1, wherein a detachable tank cover 101 is provided at the upper and lower ends of the separation tank 1, a rotating device 2 is rotatably provided between the tank covers 101 at both ends, a cylindrical filter screen 3 is installed outside the rotating device 2 between the tank covers 101 at both ends, a liquid inlet pipe 102 is installed at the upper tank cover 101, a liquid inlet valve 103 is installed at the liquid inlet pipe 102, the liquid inlet pipe 102 corresponds to the inner side of the filter screen 3, and a waste pipe 104 and a liquid outlet pipe 105 are provided at the bottom position of the lower tank cover 101, the waste pipe 104 is located on the inner side of the filter screen 3, and the liquid outlet pipe 105 is located on the filter screen 3. On the outside of the separation tank 1, a waste valve 106 is installed at the waste pipe 104, and a liquid outlet valve 107 is installed at the liquid outlet pipe 105; a shell 4 is coaxially arranged on the outside of the separation tank 1, a steam chamber 41 is formed between the shell 4 and the separation tank 1, a steam inlet pipe 42 is arranged near the bottom of the side of the shell 4, and a steam outlet pipe 43 is arranged near the top of the side of the shell 4; the solution vapor evaporated in the evaporation tank enters the steam chamber 41 through the steam inlet pipe 42, heats the separation tank 1 and is discharged from the steam outlet pipe 43; a liquid drain pipe 44 is obliquely arranged at the bottom of the shell 4, and a detachable pipe cover 45 is arranged at the liquid drain pipe 44.

[0039] In the above technical solution, the raw material to be concentrated enters the separation tank 1 through the liquid inlet pipe 102 and is located on the inner side of the filter 3. The raw material is centrifugally thrown out by the rotation of the rotary device 2 and passes through the filter 3, while impurities in the raw material are intercepted by the filter 3.

[0040] When the evaporator is in operation, the raw material steam at the upper end of the evaporator is discharged. In conventional technical means, this part of the steam is recovered by condensation. In the present invention, this part of the high-temperature evaporated steam will also enter the shell 4, and play a role in heating the separation tank 1, so that the raw material entering the separation tank 1 is preliminarily preheated, thereby increasing the temperature of the raw material when entering the separation tank 1, and improving the evaporation efficiency.

[0041] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the rotary device 2 includes a hollow rotary body 21, and a hollow shaft 22 is coaxially arranged at the upper and lower ends of the rotary body 21. A bearing 23 and a shaft seal 24 are matched between the hollow shaft 22 and the tank cover 101. The shaft seal 24 is sealed on the inner side of the bearing 23. A stirring unit 5 is arranged on the outer side of the rotary body 21, and the stirring unit 5 is located on the inner side of the filter 3. A steam outlet box 25 is fixed above the tank cover 101 at the top, and a steam outlet box 25 is fixed on the bottom of the tank cover 101 at the bottom. A steam inlet box 26 is provided below the tank cover 101, the steam outlet box 25 is connected to a first steam outlet pipe 251, a steam outlet valve 252 is installed on the first steam outlet pipe 251, the hollow shaft 22 above is inserted into the steam outlet box 25, a first bearing 253 and a first shaft seal 254 are provided between the hollow shaft 22 and the steam outlet box 25, the first shaft seal 254 is sealed on the inner side of the first bearing 253, and a first shaft seal 254 is provided between the steam outlet box 25 and the tank cover 101 above. There is a bracket 2544; a first steam inlet pipe 261 is arranged on the side of the steam inlet box 26, and the first steam inlet pipe 261 is connected to a booster pump 262, the lower end of the hollow shaft 22 is inserted into the steam inlet box 26, and a second bearing 263 and a second shaft seal 264 are matched between the hollow shaft 22 and the steam inlet box 26, and the second shaft seal 264 is sealed on the inner side of the second bearing 263; the steam inlet box 26 is connected to a branch pipe 265, and the branch pipe 265 is connected to the The steam inlet pipe 42 is provided with a valve 266 on the branch pipe 265; a heat insulation cover 7 is installed on the outside of the shell 4, a drive motor 27 is installed through the heat insulation cover 7, and a transmission mechanism 28 is cooperated between the drive motor 27 and the hollow shaft 22; the steam outlet pipe 43 is connected to the first steam outlet pipe 251, and the connection position is located on the side of the steam outlet valve 252 away from the steam outlet box 25; drain valves 299 are provided at the bottom of the steam inlet box 26 and the steam outlet box 25.

[0042] In the above technical solution, the high-temperature steam formed after the raw material evaporates enters the steam inlet box 26 for distribution, part of it enters the outer shell 4 through the steam inlet pipe 42 to heat the separation tank 1, and the other part enters the rotating body 21 through the hollow shaft 22, so that the rotating body 21 is preheated; thereby, the raw material entering the filter 3 directly contacts the heated rotating body 21, thereby increasing the heating efficiency of the raw material.

[0043] If the steam condenses in the steam inlet box 26 and the steam outlet box 25, the liquid can be drained regularly through the drain valve 299.

[0044] See also Figure 1 As shown, the transmission mechanism 28 is a belt transmission mechanism.

[0045] See also Figure 2 As shown, a scraper device 8 is provided at the bottom of the rotating body 21 , and the scraper device 8 cooperates with the waste pipe 104 .

[0046] The scraper device 8 is mainly used to stir the particles that have settled to the bottom, so as to facilitate the discharge of these particles that have settled to the bottom through the waste pipe 104 .

[0047] See also Figure 5 As shown, the scraper device 8 includes a V-shaped scraper 81 and a connecting plate 82 connected between the scraper 81 and the rotating body 21 , and the inner corner of the scraper 81 is opposite to the waste pipe 104 .

[0048] In the above technical solution, a V-shaped scraper 81 is adopted. When the scraper 81 rotates with the rotating body 21, the inner corner of the scraper 81 faces the rotation direction, and the particles settled to the bottom are collected at the inner corner of the scraper 81, and these particles are discharged through the waste pipe 104 when corresponding to the waste pipe 104.

[0049] See also Figure 6 , Figure 7 and Figure 8As shown, the stirring unit 5 includes a terminal 51, a part of the terminal 51 is screwed into the rotating body 21, a sealing gasket 52 is arranged between the terminal 51 and the rotating body 21, a stepped hole 53 is arranged at the axis of the terminal 51, the stepped hole 53 includes a large diameter part 531, a small diameter part 532 and a middle diameter part 533, a slider 54 is slidably matched at the large diameter part 531, an inner shaft 55 is arranged at one end of the slider 54, the inner shaft 55 is slidably matched in the small diameter part 532, a sealing ring 56 is embedded in the outer wall of the small diameter part 532, A seal is formed between the sealing ring 56 and the small diameter portion 532; an adjusting rod 57 is threadedly connected to the end of the inner shaft 55 away from the slider 54, and the end of the adjusting rod 57 is matched with a limiting plate 58. A spring 59 is sleeved on the adjusting rod 57, and the spring 59 acts between the limiting plate 58 and the middle diameter portion 533; under the rebound action of the spring 59, the slider 54 slides into the large diameter portion 531, and the sealing ring 56 is located in the small diameter portion 532; a stirring plate 510 is arranged at the end of the slider 54 away from the inner shaft 55.

[0050] In the above technical solution, by closing the steam outlet valve 252 and the valve 266, the high-temperature steam can only enter the rotating body 21 through the steam inlet box 26. The high-temperature steam entering the rotating body 21 cannot be discharged, so that the air pressure in the rotating body 21 increases, and then the inner shaft 55 is pushed outward, so that the stirring diameter of the stirring plate 510 increases.

[0051] In the above technical solution, the pressure in the rotating body 21 is increased by intermittently closing the steam outlet valve 252 and the valve 266, so that the stirring diameter of the stirring plate 510 is increased. When the steam outlet valve 252 is opened, the stirring plate 510 returns to its original position.

[0052] The steam outlet valve 252 and the valve 266 are electrically controlled valves, which can be operated by a controller without manual opening or closing.

[0053] See also Figure 2 and Figure 6 As shown, the end of the stirring plate 510 away from the slider 54 is implanted with bristles 511. When the steam pressure in the rotating body 21 increases, the inner shaft 55 moves outward in a direction away from the axis of the rotating body 21. At this time, the bristles 511 contact the inner wall of the filter 3.

[0054] In the above technical solution, bristles 511 are implanted in the stirring plate 510. When the stirring plate 510 moves outward to the extreme position, the bristles 511 contact the filter screen 3, and as the rotating body 21 rotates, the filter screen is cleaned.

[0055] See also Figure 7As shown, a slide plate 551 is provided at the end of the inner shaft 55, and the inner shaft 55 is loosely matched with the small diameter portion 532. The plate surface of the slide plate 551 is provided with through holes 552 for ejecting steam in an annular manner. When the spring 59 is compressed and rebounded, the slide plate 551 is always located in the small diameter portion 532. When the spring 59 is compressed to the limit, the sealing ring 56 slides into the large diameter portion 531. At this time, the high-temperature steam in the rotating body 21 enters the inner side of the filter 3 through the stepped hole 53.

[0056] In the above technical solution, by designing the position of the sealing ring 56, when the inner shaft 55 slides outward a certain distance, the high-temperature steam in the rotating body 21 can be directly discharged into the inner side of the filter screen 3, steam flushing the filter screen 3 to clean it.

[0057] Furthermore, this pressure relief structural design can prevent excessive pressure in the rotary body 21 and play a role in safety protection.

[0058] In practical applications, it is only necessary to maintain the high-pressure steam input, and the pressure is automatically released when the inner shaft 55 slides out to a certain distance.

[0059] See also Figure 7 and Figure 8 As shown, a jet hole 5311 is obliquely penetrated at the large diameter portion 531, a retaining ring 5441 is provided at the outer wall of the slider 54, and a conical retreat surface 5442 is processed at the end of the slider 54 inserted into the large diameter portion 531. When the retaining ring 5441 is limited to the outside of the terminal 51, a drainage channel is formed between the retreat surface 5442 and the large diameter portion 531 and the small diameter portion 532.

[0060] The above technical solution is mainly to prevent raw materials from being retained in the stepped hole when the slider 54 returns to its original position.

[0061] See also Fig. 9 An evaporation concentration system shown includes the raw material filtering device 8989.

[0062] The system includes a raw material steam pipeline 8988, a booster pump 262, and a raw material feed pipe 8987.

[0063] The raw material filtering device 8989 is connected in series to the raw material inlet pipe 8987, and the booster pump 262 is connected in series to the raw material steam pipeline 8988 of the concentration system.

[0064] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A raw material filtering device, characterized in that: The invention comprises a separation tank (1), wherein the upper and lower ends of the separation tank (1) are provided with a detachable tank cover (101), a rotating device (2) is rotatably arranged between the tank covers (101) at both ends, a cylindrical filter screen (3) is installed between the tank covers (101) at both ends and located outside the rotating device (2), a liquid inlet pipe (102) is installed at the upper tank cover (101), a liquid inlet valve (103) is installed at the liquid inlet pipe (102), the liquid inlet pipe (102) corresponds to the inner side of the filter screen (3), a waste pipe (104) and a liquid outlet pipe (105) are arranged at the bottom position of the lower tank cover (101), the waste pipe (104) is located on the inner side of the filter screen (3), the liquid outlet pipe (105) is located on the outer side of the filter screen (3), and the waste pipe (104) is located on the inner side of the filter screen (3), and the liquid outlet pipe (105) is located on the outer side of the filter screen (3). A waste valve (106) is installed at the waste pipe (104), and a liquid outlet valve (107) is installed at the liquid outlet pipe (105); a shell (4) is coaxially arranged outside the separation tank (1), a steam chamber (41) is formed between the shell (4) and the separation tank (1), a steam inlet pipe (42) is arranged near the bottom of the side of the shell (4), and a steam outlet pipe (43) is arranged near the top of the side of the shell (4); the solution vapor evaporated in the evaporation tank enters the steam chamber (41) through the steam inlet pipe (42), heats the separation tank (1), and is discharged from the steam outlet pipe (43); a liquid discharge pipe (44) is obliquely arranged at the bottom of the shell (4), and a detachable pipe cover (45) is arranged at the liquid discharge pipe (44).

2. The raw material filtering device according to claim 1, characterized in that: The rotating device (2) comprises a hollow rotating body (21), the upper end and the lower end of the rotating body (21) are coaxially provided with a hollow shaft (22), a bearing (23) and a shaft seal (24) are matched between the hollow shaft (22) and the tank cover (101), the shaft seal (24) is sealed on the inner side of the bearing (23), a stirring unit (5) is arranged on the outer side of the rotating body (21), the stirring unit (5) is located on the inner side of the filter screen (3), a steam outlet box (25) is fixed above the upper tank cover (101), and a steam outlet box (25) is fixed above the lower tank cover (101) A steam inlet box (26) is arranged below the steam outlet box (101), the steam outlet box (25) is connected to a first steam outlet pipe (251), a steam outlet valve (252) is installed on the first steam outlet pipe (251), the hollow shaft (22) above is inserted into the steam outlet box (25), a first bearing (253) and a first shaft seal (254) are arranged between the hollow shaft (22) and the steam outlet box (25), the first shaft seal (254) is sealed on the inner side of the first bearing (253), a support is arranged between the steam outlet box (25) and the tank cover (101) above The side of the steam inlet box (26) is provided with a first steam inlet pipe (261), the first steam inlet pipe (261) is connected to a booster pump (262), the lower end of the hollow shaft (22) is inserted into the steam inlet box (26), a second bearing (263) and a second shaft seal (264) are provided between the hollow shaft (22) and the steam inlet box (26), the second shaft seal (264) is sealed on the inner side of the second bearing (263); the steam inlet box (26) is connected to a branch pipe (265), the branch pipe (265) is connected to the steam inlet box (26) and the steam inlet box (26) is connected to the branch pipe (265). pipe (42), a valve (266) is arranged on the branch pipe (265); a heat insulation cover (7) is installed on the outside of the shell (4), a drive motor (27) is installed through the heat insulation cover (7), and a transmission mechanism (28) is matched between the drive motor (27) and the hollow shaft (22); the steam outlet pipe (43) is connected to the first steam outlet pipe (251), and the connection position is located on the side of the steam outlet valve (252) away from the steam outlet box (25); drain valves (299) are arranged at the bottom of the steam inlet box (26) and the steam outlet box (25).

3. The raw material filtering device according to claim 2, characterized in that: The transmission mechanism (28) is a belt transmission mechanism or a gear transmission mechanism.

4. The raw material filtering device according to claim 2, characterized in that: A scraper device (8) is provided at the bottom of the rotating body (21), and the scraper device (8) cooperates with the waste pipe (104).

5. The raw material filtering device according to claim 4, characterized in that: The scraper device (8) comprises a V-shaped scraper (81) and a connecting plate (82) connected between the scraper (81) and the rotating body (21), and the inner corner of the scraper (81) is opposite to the waste pipe (104).

6. The raw material filtering device according to claim 2, characterized in that: The stirring unit (5) comprises a terminal (51), a part of the terminal (51) is screwed into the rotating body (21), a sealing gasket (52) is arranged between the terminal (51) and the rotating body (21), a stepped hole (53) is arranged at the axis of the terminal (51), the stepped hole (53) comprises a large diameter part (531), a small diameter part (532) and a middle diameter part (533), a slider (54) is slidably fitted at the large diameter part (531), an inner shaft (55) is arranged at one end of the slider (54), the inner shaft (55) is slidably fitted in the small diameter part (532), a sealing ring (56) is embedded in the outer wall of the small diameter part (532), and the A seal is formed between the sealing ring (56) and the small diameter portion (532); an adjusting rod (57) is threadedly connected to the end of the inner shaft (55) away from the slider (54); the end of the adjusting rod (57) cooperates with a limiting plate (58); a spring (59) is sleeved on the adjusting rod (57); the spring (59) acts between the limiting plate (58) and the middle diameter portion (533); under the rebound action of the spring (59), the slider (54) slides into the large diameter portion (531), and the sealing ring (56) is located in the small diameter portion (532); a stirring plate (510) is arranged at the end of the slider (54) away from the inner shaft (55).

7. The raw material filtering device according to claim 6, characterized in that: Bristles (511) are implanted at the end of the stirring plate (510) away from the slider (54). When the steam pressure in the rotating body (21) increases, the inner shaft (55) moves outward in a direction away from the axis of the rotating body (21), and the bristles (511) contact the inner wall of the filter (3).

8. The raw material filtering device according to claim 7, characterized in that: A slide plate (551) is provided at the end of the inner shaft (55). The inner shaft (55) is loosely fitted with the small diameter portion (532). Through holes (552) for ejecting steam are distributed in an annular pattern on the surface of the slide plate (551). When the spring (59) is compressed and rebounded, the slide plate (551) is always located in the small diameter portion (532). When the spring (59) is compressed to the limit, the sealing ring (56) slides into the large diameter portion (531). At this time, the high-temperature steam in the rotating body (21) enters the inner side of the filter screen (3) through the stepped hole (53).

9. The raw material filtering device according to claim 7, characterized in that: A jet hole (5311) is obliquely penetrated at the large diameter portion (531), a retaining ring (5441) is provided at the outer wall of the slider (54), and a conical retreat surface (5442) is processed at the end of the slider (54) inserted into the large diameter portion (531), and when the retaining ring (5441) is limited to the outside of the terminal (51), a drainage channel is formed between the retreat surface (5442) and the large diameter portion (531) and the small diameter portion (532).

10. An evaporation concentration system, characterized in that: A raw material filtering device comprising the device described in any one of claims 1 to 9.

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