Novel energy-saving roller dryer

Abstract

The utility model relates to the technical field of dryers, in particular to a novel energy-saving roller dryer which comprises a roller, roller end covers are arranged at two ends of the roller, a middle shaft is fixedly connected to the middle of the roller end cover at one end, the middle shaft is of a hollow structure and communicated into the roller, a transmission structure is arranged on the outer side of the tail end of the middle shaft, and the tail end of the middle shaft is connected with a rotary connector. The device has the beneficial effects that the two spraying mother pipes are arranged, dried materials are scraped off the roller through the scraper, then mother liquor spraying is carried out for the first time, the surface of the roller is utilized to the maximum extent, and after the first mother liquor spraying is carried out, the drying efficiency of the roller is greatly improved. Part of carnallite mother liquor is adhered to the surface of the roller and starts to evaporate water, the carnallite mother liquor can be further adhered to the mother liquor after being sprayed by the second mother liquor, and the mother liquor is sprayed twice, so that the liquid distribution on the surface of the roller is more uniform, and the adhesion amount on the surface of the roller is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of dryers, in particular to a novel energy-saving drum dryer. Background Art

[0002] Chemical enterprises will produce some high-salt wastewater during production and operation. In the process of treating these wastewaters by evaporation and crystallization technology, a certain amount of impure salt mother liquor will be produced. After the impure salt mother liquor is sent to the drum scraper dryer, dry impure salt can be obtained. Under the heating effect of the high-temperature drum of the drum dryer, the impure salt mother liquor in the liquid tank at the bottom of the dryer will produce some bubbles. The bubbles adhere to the surface of the drum, affecting the uniformity of the liquid distribution on the surface of the drum, and also reducing the impure salt output of the dryer. It is also easy to form static salt accumulation at the bottom of the liquid tank. After running for a period of time, the bottom of the liquid tank has serious material accumulation. It is necessary to manually clean the material accumulation at the bottom of the tank, which is labor-intensive and inefficient. The drum dryer adopts steam conduction heating method. The two end covers of the drum have large areas, large heat loss, and high steam consumption. The condensate in the drum can only be discharged from the drum when it reaches the middle liquid outlet position. The heating capacity of the condensate conduction section at the bottom of the drum is limited, which limits the improvement of the efficiency of the drum dryer. For this reason, the utility model proposes a new energy-saving drum dryer to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a novel energy-saving drum dryer to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: a new energy-saving drum dryer, comprising

[0005] A drum, wherein drum end covers are arranged at both ends of the drum, a central shaft is fixedly connected to the middle of the drum end cover at one end, the central shaft is a hollow structure connected to the drum, a transmission structure is arranged on the outside of the end of the central shaft, and a rotary joint is connected to the end of the central shaft, the outer side of the rotary joint is connected to a steam input pipe, and the end of the central shaft connected to the drum at the other end is connected to a siphon pipe through a rotary joint, the siphon pipe is connected to the bottom of the drum, the outer side of the siphon pipe is connected to a condensate output pipe, the condensate output pipe is connected to a steam trap, and the other end of the steam trap is connected to a recovery tank through a pipeline, membrane structures are arranged on both sides of the drum, a scraper structure is arranged on the upper end of one membrane structure, and an exhaust structure is arranged on the upper end of the drum;

[0006] The membrane structure comprises a first spray main pipe and a second spray main pipe arranged on both sides of the drum.

[0007] Preferably, the transmission structure includes a driven gear fixedly connected to the outer side of the end of the central shaft on one side of the drum, the outer side of the driven gear is connected to a synchronous belt, the other end of the synchronous belt is connected to the outer side of the driving gear, the driving gear is fixedly connected to the outer side of the transmission output end of the motor, and the motor is fixed on the mounting base.

[0008] Preferably, a thermal insulation layer is provided inside both ends of the drum, and the thermal insulation layer is arc-shaped.

[0009] Preferably, a liquid tank is provided on the outer side of the lower end of the drum, and the inner bottom surface of the liquid tank is an inclined surface with a higher angle on the left rear side and a lower angle on the right front side. A reflux hole is connected at the right end of the liquid tank, and a reflux pipe is connected to the outer side of the reflux hole, and the reflux pipe is connected to the mother liquid tank.

[0010] Preferably, the scraper structure comprises a cylinder fixedly connected to both ends of the drum, the cylinder is arranged in an inclined state, the transmission output end of the cylinder is fixedly connected to a scraper, and the upper end of the scraper is tangent to the outer wall of the drum.

[0011] Preferably, the membrane structure includes a first spray main pipe arranged at the lower part of the front side of the drum and a second spray main pipe symmetrically arranged on the other side of the drum. The first spray main pipe and the second spray main pipe are parallel to the axial direction of the drum. The inner sides of the first spray main pipe and the second spray main pipe are connected to the spray head, and the spray head is arranged vertically to the drum.

[0012] Preferably, the exhaust structure includes a steam collecting hood arranged at the upper end of the drum, the upper end of the steam collecting hood is connected to a steam extraction pipe, the upper end of the steam extraction pipe is connected to an induced draft fan, the upper end of the induced draft fan is connected to an exhaust chimney through a pipeline, a condenser is arranged inside the exhaust chimney, one end of the condenser is connected to a circulating water input pipe, and the other end is connected to a circulating water output pipe, one side of the lower end of the exhaust chimney is connected to a condensate recovery pipe, and the end of the condensate recovery pipe is connected to a recovery tank.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides two spraying mother pipes. After the scraper scrapes the dried material off the drum, the first mother liquid spray is immediately performed, and the drum surface is utilized to the maximum extent. After the first mother liquid spray, part of the impure salt mother liquid has adhered to the drum surface and started to evaporate water. After the second mother liquid spray, the mother liquid can be further adhered. After two mother liquid sprays, the liquid distribution on the drum surface is more uniform, and the adhesion amount on the drum surface is greatly improved. By providing a siphon, the condensate amount in the drum is controlled to the bottom limit, and most of the space in the drum is Steam can reduce the rotation load of the drum on the one hand, and on the other hand, the surface area of ​​the drum in contact with the steam for heat exchange increases, which is beneficial to the drying of the mother liquor and improves the capacity of the drum dryer. The drum end cover is provided with a thermal insulation layer to reduce the heat loss of the two end covers, which is beneficial to reduce the steam consumption of the dryer and has obvious energy-saving effect; the bottom plate of the liquid tank is inclined, and the impurities in the mother liquor are not easy to deposit in the liquid tank. The exhaust pipe is provided with a circulating water cooling section to cool the water vapor evaporated from the mother liquor into condensate for recovery, saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a side view of the drum in the utility model.

[0017] In the figure: 1 rotary joint, 2 driven gear, 3 drum, 4 siphon, 5 insulation layer, 6 steam extraction pipe, 7 induced draft fan, 8 exhaust pipe, 9 condenser, 10 steam trap, 11 reflux pipe, 12 liquid tank, 13 second spray main pipe, 14 drum end cover, 15 scraper, 16 discharge hopper, 17 cylinder, 18 first spray main pipe, 19 reflux hole, 20 motor. DETAILED DESCRIPTION

[0018] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0022] See also Figure 1 to Figure 2 The utility model provides a technical solution: a new energy-saving drum dryer, including

[0023] Drum 3, drum end covers 14 are arranged at both ends of drum 3, a central shaft is fixedly connected in the middle of drum end cover 14 at one end, the central shaft is a hollow structure connected to drum 3, a transmission structure is arranged outside the end of the central shaft, and a rotary joint 1 is connected at the end of the central shaft, the outer side of the rotary joint 1 is connected to the steam input pipe, the end of the central shaft connected to the drum 3 at the other end is connected to a siphon 4 through the rotary joint 1, the siphon 4 is connected to the bottom of the drum 3, the outer side of the siphon 4 is connected to the condensate output pipe, the condensate output pipe is connected to a steam trap 10, the other end of the steam trap 10 is connected to a recovery tank through a pipeline, membrane structures are arranged on both sides of drum 3, a scraping structure is arranged on the upper end of one side of the membrane structure, an exhaust structure is arranged on the upper end of drum 3, the condensate amount in drum 3 is controlled to the bottom limit by arranging the siphon 4, most of the space in drum 3 is steam, on the one hand, the rotation load of drum 3 can be reduced, on the other hand, the surface area of ​​drum 3 in contact with steam for heat exchange is increased, which is beneficial to the drying of mother liquor and improves the capacity of drum dryer;

[0024] The membrane structure includes a first spray main pipe 18 and a second spray main pipe 13 arranged on both sides of the drum 3;

[0025] The transmission structure includes a driven gear 2 fixedly connected to the outer side of the end of the central shaft on one side of the drum 3, a synchronous belt connected to the outer side of the driven gear 2, the other end of the synchronous belt connected to the outer side of the driving gear, the driving gear fixedly connected to the outer side of the transmission output end of the motor 20, and the motor 20 is fixed on the mounting base;

[0026] The two ends of the drum 3 are provided with a heat preservation and heat insulation layer 5, the heat preservation and heat insulation layer 5 is arc-shaped, and the drum end cover 14 is provided with a heat preservation and heat insulation layer 5, which reduces the heat loss of the two end covers, is conducive to reducing the steam consumption of the dryer, and has obvious energy-saving effect;

[0027] A liquid tank 12 is arranged outside the lower end of the drum 3. The bottom surface of the liquid tank 12 is an inclined surface with a high angle on the left rear side and a low angle on the right front side. A reflux hole 19 is connected to the right end of the liquid tank 12. The reflux hole 19 is connected to the reflux pipe 11 outside. The reflux pipe 11 is connected to the mother liquid tank. The bottom plate of the liquid tank 12 is inclined, so that the impurities in the mother liquid are not easily deposited in the liquid tank 12.

[0028] The scraping structure includes a cylinder 17 fixedly connected to both ends of the drum 3, the cylinder 17 is arranged in an inclined shape, the transmission output end of the cylinder 17 is fixedly connected to the scraper 15, and the upper end of the scraper 15 is tangentially fitted to the outer wall of the drum 3;

[0029] The film-making structure includes a first spray mother pipe 18 arranged at the lower part of the front side of the drum 3 and a second spray mother pipe 13 symmetrically arranged at the other side of the drum 3. The first spray mother pipe 18 and the second spray mother pipe 13 are parallel to the axial direction of the drum 3. The first spray mother pipe 18 and the second spray mother pipe 13 are connected to the spray head inside. The spray head is arranged vertically to the drum 3. By setting two spray mother pipes, the dried material is scraped off the drum 3 by the scraper 15, and then the second mother liquid spray is carried out, so that the surface of the drum 3 is used to the maximum extent. After the mother liquid in the first spray mother pipe 18 is sprayed, part of the impurity salt mother liquid has adhered to the drum surface and started to evaporate water. After the mother liquid in the second spray mother pipe 13 is sprayed, the mother liquid can be further adhered. After two mother liquid sprays, the liquid distribution on the surface of the drum 3 is more uniform, and the adhesion amount on the surface of the drum 3 is greatly improved.

[0030] The exhaust structure includes a steam collecting hood arranged at the upper end of the drum 3, the upper end of the steam collecting hood is connected to the steam extraction pipe 6, the upper end of the steam extraction pipe 6 is connected to the induced draft fan 7, the upper end of the induced draft fan 7 is connected to the exhaust pipe 8 through a pipeline, a condenser 9 is arranged inside the exhaust pipe 8, one end of the condenser 9 is connected to the circulating water input pipe, and the other end is connected to the circulating water output pipe, one side of the lower end of the exhaust pipe 8 is connected to the condensate recovery pipe, and the end of the condensate recovery pipe is connected to the recovery tank. The condenser 9 is arranged in the exhaust pipe 8, and the water vapor evaporated from the mother liquor can be cooled into condensate and then recovered, thereby saving water resources.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy-saving drum dryer, characterized in that: include A drum (3), wherein drum end covers (14) are arranged at both ends of the drum (3), the middle of the drum end cover (14) at one end is fixedly connected to a central shaft, the central shaft is a hollow structure connected to the inside of the drum (3), a transmission structure is arranged on the outside of the end of the central shaft, and a rotary joint (1) is connected to the end of the central shaft, the outer side of the rotary joint (1) is connected to a steam input pipe, and the end of the central shaft connected to the drum (3) at the other end is connected to a siphon pipe (4) through the rotary joint (1), the siphon pipe (4) is connected to the bottom of the drum (3), the outer side of the siphon pipe (4) is connected to a condensate output pipe, the condensate output pipe is connected to a steam trap (10), and the other end of the steam trap (10) is connected to a recovery tank through a pipeline, membrane structures are arranged on both sides of the drum (3), a scraper structure is arranged on the upper end of one membrane structure, and an exhaust structure is arranged on the upper end of the drum (3); A membrane structure, comprising a first spray main pipe (18) and a second spray main pipe (13) arranged on both sides of a drum (3).

2. A new energy-saving drum dryer according to claim 1, characterized in that: The transmission structure comprises a driven gear (2) fixedly connected to the outer side of the end of the central shaft on one side of the roller (3), the outer side of the driven gear (2) is connected to a synchronous belt, the other end of the synchronous belt is connected to the outer side of the driving gear, the driving gear is fixedly connected to the outer side of the transmission output end of the motor (20), and the motor (20) is fixed on the mounting base.

3. A new energy-saving drum dryer according to claim 1, characterized in that: A heat-insulating layer (5) is provided inside both ends of the drum (3), and the heat-insulating layer (5) is arc-shaped.

4. A new energy-saving drum dryer according to claim 1, characterized in that: A liquid trough (12) is arranged on the outer side of the lower end of the drum (3); the inner bottom surface of the liquid trough (12) is an inclined surface with a higher angle on the left rear side and a lower angle on the right front side; a reflux hole (19) is connected to the right end of the liquid trough (12); the outer side of the reflux hole (19) is connected to a reflux pipe (11); and the reflux pipe (11) is connected to a mother liquid tank.

5. A new energy-saving drum dryer according to claim 1, characterized in that: The scraping structure comprises a cylinder (17) fixedly connected to both ends of the roller (3); the cylinder (17) is arranged in an inclined shape; the transmission output end of the cylinder (17) is fixedly connected to a scraper (15); the upper end of the scraper (15) is tangentially fitted to the outer wall of the roller (3).

6. A new energy-saving drum dryer according to claim 1, characterized in that: The film-making structure comprises a first spray main pipe (18) arranged at the lower part of the front side of the drum (3) and a second spray main pipe (13) symmetrically arranged at the other side of the drum (3); the first spray main pipe (18) and the second spray main pipe (13) are parallel to the axial direction of the drum (3); the first spray main pipe (18) and the second spray main pipe (13) are connected to a spray head at the inner side; and the spray head is arranged vertically to the drum (3).

7. A new energy-saving drum dryer according to claim 1, characterized in that: The exhaust structure comprises a steam collecting hood arranged at the upper end of the drum (3), the upper end of the steam collecting hood is connected to a steam extraction pipe (6), the upper end of the steam extraction pipe (6) is connected to an induced draft fan (7), the upper end of the induced draft fan (7) is connected to an exhaust pipe (8) through a pipeline, a condenser pipe (9) is arranged inside the exhaust pipe (8), one end of the condenser pipe (9) is connected to a circulating water input pipe, and the other end is connected to a circulating water output pipe, one side of the lower end of the exhaust pipe (8) is connected to a condensate recovery pipe, and the end of the condensate recovery pipe is connected to a recovery tank.

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