Vacuum rake dryer with double-vacuumizing structure

Abstract

The utility model relates to the technical field of vacuum rake type dryers, in particular to a vacuum rake type dryer with a double-vacuumizing structure, which comprises a dryer body, a feed port and a discharge port are respectively arranged at the top and the bottom of the dryer body, one side of the dryer body in the length direction is communicated with a steam heating device, and the other side of the dryer body is connected with a control host. And two groups of vacuumizing structures, namely a first vacuumizing structure and a second vacuumizing structure, are arranged at the top of the machine body. According to the vacuum rake dryer, the first vacuumizing structure and the second vacuumizing structure are automatically switched and matched to work, particles can be prevented from blocking the sleeve, the economic cost is low, and the service life of the vacuum rake dryer can be remarkably prolonged. Through the automatic feeding valve, the automatic discharging valve, the automatic emptying valve, the automatic condensate water inlet valve, the automatic condensate water drainage valve and the like, automatic feeding, discharging, water feeding and water drainage of the vacuum rake type drying machine can be achieved, and full automation of operation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum rake dryers, and specifically relates to a vacuum rake dryer with a double vacuum pumping structure. Background Art

[0002] A vacuum rake dryer is a horizontal intermittent vacuum drying equipment. Wet materials are evaporated by conduction. A scraper agitator continuously removes the materials on the heating surface and forms a circulating flow by pushing in the container. After the water is evaporated, it is pumped out by a vacuum pump.

[0003] The existing Chinese patent with the publication number CN216716775U discloses a vacuum rake dryer, which includes a drying cylinder body, a feeding mechanism, a stirring mechanism, a transmission mechanism, a dust removal mechanism and a discharging mechanism. The vacuum rake dryer provided by the present invention adopts the design of combining the dryer with the dust removal structure, with reasonable structure design and convenient operation. The air extraction port is connected to the external vacuum condensation system through a pipeline. After the gas generated in the inner cylinder body is filtered by the dust removal mechanism, it is discharged through the air extraction port and enters the external vacuum condensation system. Since the stirring mechanism stirs the materials in the drying cylinder body, the gas entering the dust removal body carries particulate materials, and the dust removal filter component can filter out the particulate materials to avoid the particulate materials from entering the vacuum condensation system.

[0004] The above technology has the following defects: The cost of installing the dust removal structure is relatively high. There is an urgent need for another vacuum rake dryer that is both economical and can prevent the vacuum pumping pipe from being blocked by dust. Content of the Utility Model

[0005] The purpose of the utility model is to provide a vacuum rake dryer with a double vacuum pumping structure to solve the problems existing in the prior art.

[0006] To solve the above technical problems, the utility model provides the following technical solution: A vacuum rake dryer with a double vacuum pumping structure, including a machine body. A feeding port and a discharging port are respectively arranged at the top and bottom of the machine body. One side in the length direction of the machine body is connected to a steam heating device, and the other side is connected to a control host. Two vacuum pumping structures are arranged at the top of the machine body: a first vacuum pumping structure and a second vacuum pumping structure.

[0007] Further, the first vacuum pumping structure includes a first sleeve, a first automatic vacuum valve and a first automatic backflush valve. The first automatic vacuum valve is installed at the top of the first sleeve, and the first automatic backflush valve is located at the top of the first sleeve and below the first automatic vacuum valve; the second vacuum pumping structure includes a second sleeve, a second automatic vacuum valve and a second automatic backflush valve. The second automatic vacuum valve is installed at the top of the second sleeve, and the second automatic backflush valve is located at the top of the second sleeve and below the second automatic vacuum valve.

[0008] Further, both the first sleeve and the second sleeve include an outer shell and an inner shell, and there is a sandwich layer for heat insulation between the outer shell and the inner shell.

[0009] Further, the first vacuum pumping structure and the second vacuum pumping structure are located on the left and right sides of the top of the machine body.

[0010] Further, the first vacuum pumping structure and the second vacuum pumping structure are commonly connected to the same vacuum pump buffer tank.

[0011] Further, an automatic feeding valve, a temperature sensor, and a pressure sensor are provided at the feeding port of the machine body.

[0012] Further, an automatic discharging valve is provided at the discharging port of the machine body.

[0013] Further, an air vent pipe and an automatic air vent valve are provided at one end of the top of the machine body close to the steam heating device.

[0014] Further, a drain pipe, an automatic drain valve, and a steam heating valve are provided at one end of the top of the machine body close to the control host.

[0015] Further, a water inlet pipe and an automatic cooling water inlet valve are provided at one end of the bottom of the machine body close to the control host; a drain pipe and a first automatic condensate drain valve are provided at one end of the bottom of the machine body close to the steam heating device; a second automatic condensate drain valve is provided at the connecting pipe between the machine body and the steam heating device.

[0016] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0017] By the two automatic switching and cooperating operations of the first vacuum pumping structure and the second vacuum pumping structure, the present utility model can prevent the sleeves from being blocked by particles, and has low economic cost, high resource recycling rate, and is environmentally friendly;

[0018] The present utility model has fewer blockages and can significantly extend the service life of the vacuum rake dryer;

[0019] By the automatic feeding valve, automatic discharging valve, automatic air vent valve, automatic cooling water inlet valve, first automatic condensate drain valve, second automatic condensate drain valve, etc., the present utility model realizes automatic feeding, discharging, air venting, water inletting, and draining, and is a completely automated integrated machine;

[0020] The present utility model can be applied to the fields of organic solvent and ethanol recovery. Description of the Drawings

[0021] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0022] Figure 1 It is a schematic structural diagram of a vacuum rake dryer with a double vacuum pumping structure;

[0023] In the figure, 1 is the body; 11 is the feed inlet; 12 is the discharge outlet; 13 is the temperature sensor; 14 is the pressure sensor; 15 is the vent pipe; 16 is the drain pipe; 17 is the water inlet pipe; 2 is the steam heating device; 21 is the steam heating valve; 3 is the control host; 31 is the automatic feed valve; 32 is the automatic discharge valve; 33 is the automatic drain valve; 34 is the automatic cooling water inlet valve; 35 is the first condensate automatic drain valve; 36 is the second condensate automatic drain valve; 37 is the automatic vent valve; 4 is the first vacuum pumping structure; 41 is the first sleeve; 42 is the first automatic vacuum valve; 43 is the first automatic backflush valve; 5 is the second vacuum pumping structure; 51 is the second sleeve; 52 is the second automatic vacuum valve; 53 is the second automatic backflush valve; 54 is the outer shell; 55 is the inner shell; 56 is the interlayer; 6 is the vacuum pump buffer tank. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0025] As Figure 1 shown, this embodiment discloses a vacuum rake dryer with a double vacuum pumping structure, including a body 1. A feed inlet 11 and a discharge outlet 12 are respectively provided at the top and bottom of the body 1. One side in the length direction of the body 1 of the body 1 is connected to a steam heating device 2, and a steam heating valve 21 is arranged beside the steam heating device 2. The other side is connected to a control host 3. Two groups of vacuum pumping structures are provided at the top of the body 1: a first vacuum pumping structure 4 and a second vacuum pumping structure 5.

[0026] Based on the actual application, the first vacuum pumping structure 4 includes a first sleeve 41, a first automatic vacuum valve 42 and a first automatic backflush valve 43. The second vacuum pumping structure 5 has the same structure as the first vacuum pumping structure 4, including a second sleeve 51, a second automatic vacuum valve 52 and a second automatic backflush valve 53. The two sets of vacuum pumping structures can be repeatedly manufactured and used without the need to design new vacuum pumping structures, which is economical and environmentally friendly. During installation, two through holes are reserved on the left and right sides of the housing at the top of the machine body 1. The first sleeve 41 and the second sleeve 51 are respectively welded above the through holes on the left and right sides at the top of the machine body 1. The vacuum pumping pipes of the first sleeve 41 and the second sleeve 51 are commonly connected to the same vacuum pump buffer tank 6. The first automatic vacuum valve 42 is installed on the vacuum pumping pipe at the top of the first sleeve 41, and the second automatic vacuum valve 52 is installed on the vacuum pumping pipe at the top of the second sleeve 51. The first automatic backflush valve 43 is installed at the top of the first sleeve 41 and is located below the first automatic vacuum valve 42, and the second automatic backflush valve 53 is installed at the top of the second sleeve 51 and is located below the second automatic vacuum valve 52. The first automatic vacuum valve 42, the first automatic backflush valve 43, the second automatic vacuum valve 52 and the second automatic backflush valve 53 are all communicatively connected to the control host 3 and are automatically controlled to open and close by the control host 3. Among them, both the first sleeve 41 and the second sleeve 51 include an outer shell 54 and an inner shell 55, and there is an interlayer 56 for heat insulation between the outer shell 54 and the inner shell 55, which can keep the inside of the first sleeve 41 and the second sleeve 51 warm, thereby reducing the loss of the internal temperature of the machine body 1.

[0027] Based on the above, an automatic feed valve 31, a temperature sensor 13 and a pressure sensor 14 are provided at the feed inlet 11 of the machine body 1, and an automatic discharge valve 32 is provided at the discharge outlet 12 of the machine body 1. A vent pipe 15 and an automatic vent valve 37 are provided at one end of the top of the machine body 1 close to the steam heating device 2. A drain pipe 16, an automatic drain valve 33 and a steam heating valve 21 are provided at one end of the top of the machine body 1 close to the control host 3. A water inlet pipe 17 and a cooling water automatic inlet valve 34 are provided at one end of the bottom of the machine body 1 close to the control host 3; a drain pipe 16 and a first condensate automatic drain valve 35 are provided at one end of the bottom of the machine body 1 close to the steam heating device 2; a second condensate automatic drain valve 36 is provided at the connecting pipe between the machine body 1 and the steam heating device 2. The vacuum rake dryer of this embodiment realizes automatic feeding, discharging, venting, automatic water inlet and drainage through the automatic feed valve 31, the automatic discharge valve 32, the automatic vent valve 37, the cooling water automatic inlet valve 34, the first condensate automatic drain valve 35, the second condensate automatic drain valve 36, etc., and thus realizes fully automated control.

[0028] The operating principle of this embodiment is as follows: The object to be dried is added from the feeding port 11 in the exact middle above the housing of the machine body 1. Under the agitation of the rake teeth that rotate forward and backward continuously, the material moves back and forth axially, the surface in contact with the inner wall of the housing is continuously updated, and it is indirectly heated by steam. With the uniform agitation of the rake teeth and the pulverization of the pulverizing rod, the moisture on the surface of the material is discharged from the first condensate automatic drain valve 35 and the second condensate drain valve. The vent valve is regulated by the control host 3, so that the vaporized moisture is automatically vented from the vent pipe 15.

[0029] During operation, nitrogen / filtered fresh air continuously enters the machine body 1 from the first vacuum pumping structure. Both the first vacuum pumping structure 3 and the second vacuum pumping structure 4 are always working to pump the internal air to create a negative pressure environment. When it is assumed that the first vacuum pumping structure is clogged with particles after a long time, the control host 3 controls the first automatic vacuum valve 42 to close and the first automatic backflush valve 43 to open, and blows the clogged particles or powder downward into the machine body 1. At the same time, the second vacuum pumping structure continues to work and exhaust air to form a negative pressure inside the machine body 1. With the help of the negative pressure, the particles or powder are more likely to leave from the first sleeve 41 of the first vacuum pumping structure, slowing down the clogging situation. By analogy, when the second vacuum pumping structure needs to clean the clogged particles or powder, the control host 3 automatically closes the second automatic vacuum valve 52 and opens the first automatic vacuum valve 42 and the second automatic backflush valve 53. In this way, the clogging caused by alternately cleaning the particles or powder is carried out, so that the working time of the vacuum rake dryer is extended.

[0030] This embodiment includes but is not limited to applications in the fields of organic solvent and ethanol recovery.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed claim.

Claims

1. A vacuum rake dryer with a double vacuum pumping structure, comprising a body (1). A feed inlet (11) and a discharge outlet (12) are respectively arranged at the top and bottom of the body (1). One side in the length direction of the body (1) is communicated with a steam heating device (2), and the other side is connected to a control mainframe (3). It is characterized in that, There are two sets of vacuum pumping structures provided at the top of the body (1): the first vacuum pumping structure (4) and the second vacuum pumping structure (5).

2. The vacuum rake dryer with a double vacuum pumping structure according to claim 1, characterized in that, The first vacuum pumping structure (4) includes a first sleeve (41), a first automatic vacuum valve (42), and a first automatic backflush valve (43). The first automatic vacuum valve (42) is installed at the top of the first sleeve (41), and the first automatic backflush valve (43) is located at the top of the first sleeve (41) and below the first automatic vacuum valve (42). The second vacuum pumping structure (5) includes a second sleeve (51), a second automatic vacuum valve (52), and a second automatic backflush valve (53). The second automatic vacuum valve (52) is installed at the top of the second sleeve (51), and the second automatic backflush valve (53) is located at the top of the second sleeve (51) and below the second automatic vacuum valve (52).

3. The vacuum rake dryer with a double evacuation structure according to claim 2, characterized in that, Both the first sleeve (41) and the second sleeve (51) include an outer shell (54) and an inner shell (55), and there is an interlayer (56) for heat insulation between the outer shell (54) and the inner shell (55).

4. The vacuum rake dryer with a double evacuation structure according to claim 3, characterized in that, The first vacuum pumping structure (4) and the second vacuum pumping structure (5) are located on the left and right sides at the top of the body (1).

5. The vacuum rake dryer with a double evacuation structure according to claim 4, characterized in that, The first vacuum pumping structure (4) and the second vacuum pumping structure (5) are commonly connected to the same vacuum pump buffer tank (6).

6. The vacuum rake dryer with a double vacuum pumping structure according to claim 1, characterized in that, An automatic feed valve (31), a temperature sensor (13), and a pressure sensor (14) are provided at the feed inlet (11) of the body (1).

7. The vacuum rake dryer with a double vacuum pumping structure according to claim 6, characterized in that, An automatic discharge valve (32) is provided at the discharge outlet (12) of the body (1).

8. The vacuum rake dryer with a double evacuation structure according to claim 7, characterized in that, A vent pipe (15) and an automatic vent valve (37) are provided at one end of the top of the body (1) close to the steam heating device (2).

9. The vacuum rake dryer with a double evacuation structure according to claim 8, characterized in that, A drain pipe (16), an automatic drain valve (33), and a steam heating valve (21) are provided at one end of the top of the body (1) close to the control host (3).

10. The vacuum rake dryer with a double vacuum pumping structure according to claim 9, characterized in that, An inlet pipe (17) and a cooling water automatic inlet valve (34) are provided at one end of the bottom of the body (1) close to the control host (3). A drain pipe (16) and a first condensate automatic drain valve (35) are provided at one end of the bottom of the body (1) close to the steam heating device (2). A second condensate automatic drain valve (36) is provided at the connecting pipe between the body (1) and the steam heating device (2).

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