Roller scraper dryer

Abstract

The utility model relates to a roller scraper drying machine which comprises a roller, the roller comprises a rotating shaft, the outer side of the rotating shaft is sleeved with a heat storage layer, the heat storage layer is sleeved with a heat absorption layer used for absorbing solar light and heat, one side of the roller is provided with a scraper device and a material distributing device, and a gas collecting hood is arranged above the roller. The top of the gas-collecting hood is provided with an extraction opening, the extraction opening is sequentially connected with an induced draft fan and a thermal medium channel of a heat exchanger through pipelines, the thermal medium channel of the heat exchanger is provided with a condensate outlet, and the material distributing device is sequentially connected with a cold medium channel of the heat exchanger and the material liquid conveying device through pipelines; the roller scraper dryer has the advantages of being low in energy consumption and high in drying efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a drum scraper dryer. Background Art

[0002] The conventional scraper drum dryer is used for drying liquids, such as seawater desalination, seawater salt production, sewage treatment, etc. The conventional scraper drum dryer includes a drum, which is heated by an electric heating device, steam, hot water, or hot oil, and has the disadvantages of high energy consumption and low drying efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a drum scraper dryer, which has the characteristics of low energy consumption and high drying efficiency.

[0004] In order to solve the above technical problems, the utility model provides a drum scraper dryer, comprising a drum, the drum comprising a rotating shaft, a heat storage layer being provided on the outer side of the rotating shaft, a heat absorption layer being provided on the heat storage layer for absorbing solar heat, a scraper device and a distribution device being provided on one side of the drum, an air collecting hood being provided above the drum, an air exhaust port being provided on the top of the air collecting hood, the air exhaust port being connected to the induced draft fan and the heat medium channel of the heat exchanger in sequence through a pipeline, a condensate outlet being provided on the heat medium channel of the heat exchanger, and the distribution device being connected to the cold medium channel of the heat exchanger and the liquid conveying device in sequence through a pipeline.

[0005] Further preferably, the heat exchanger is a heat pipe heat exchanger.

[0006] Further preferably, a heat-insulating layer is provided on the rotating shaft, and the heat storage layer is provided on the heat-insulating layer; the heat-insulating layer is used to prevent heat from being conducted from the heat storage layer to the rotating shaft to cause heat loss.

[0007] Further preferably, a sunlight automatic tracking concentrator is provided on one side of the drum, and the sunlight automatic tracking concentrator is used to reflect sunlight onto the heat absorption layer; the sunlight automatic tracking concentrator completely tracks the movement trajectory of the sun and reflects sunlight onto the heat absorption layer, and its incident angle is 0, thereby increasing the utilization rate of solar radiation.

[0008] Further preferably, the condensate outlet of the heat exchanger is connected to a condensate storage tank through a pipeline; the condensate is stored in the condensate storage tank for easy storage or treatment.

[0009] Further preferably, the liquid feed conveying device is a feed pump, and the feed port of the liquid feed conveying device is connected to the liquid feed storage tank through a pipeline.

[0010] Further preferably, a spiral discharging machine is provided below the scraper device; the spiral discharging machine is used to collect the dry material scraped off by the scraper device.

[0011] Further preferably, the distributing device evenly coats the liquid material on the outer surface of the heat absorbing layer through a coating roller; the distributing device can also be a nozzle to evenly spray the liquid material onto the outer surface of the heat absorbing layer.

[0012] The present invention has the following beneficial effects: during operation, the heat-absorbing layer absorbs solar heat and transfers the heat to the heat storage layer for storage. The heat storage layer enables the heat-absorbing layer to continuously generate heat. The liquid conveying device conveys the liquid to the cold medium channel of the heat exchanger for heat exchange preheating. The preheated liquid enters the distribution device, which evenly distributes the liquid onto the outer surface of the heat-absorbing layer. The liquid absorbs heat from the heat-absorbing layer and gradually dehydrates to form a solid film. The scraper device uses a scraper to peel the solid film from the heat-absorbing layer to obtain dry material. The evaporated water vapor in the liquid flows through the gas collecting hood and the induced draft fan in sequence, and then enters the hot medium channel of the heat exchanger for heat exchange. The condensate generated during the heat exchange flows out from the condensate outlet, and the exhaust gas is discharged into the atmosphere. Since the drum uses solar energy to dry the liquid, a large amount of energy can be saved. The liquid is preheated by heat exchange with water vapor in the heat exchanger, and there is no need to provide additional heat energy to the heat exchanger, thereby improving drying efficiency and saving energy. The new drum scraper dryer has the characteristics of low energy consumption and high drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to clearly illustrate the innovative principle of the utility model and its advantages over existing scraper dryers, possible embodiments are described below by means of non-limiting examples applying the principle with the aid of the accompanying drawings. In the drawings:

[0014] Figure 1 It is a schematic diagram of the drum scraper dryer of the present utility model. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] Based on the embodiments of this invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this invention.

[0017] It should be noted that all directional indications in the present embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0018] In this disclosure, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood in a broad sense. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances. Example

[0019] like Figure 1 A drum scraper dryer comprises a drum 1, wherein the drum 1 comprises a rotating shaft 2, a heat storage layer 4 is provided on the outer side of the rotating shaft 2, a heat absorption layer 5 for absorbing solar heat is provided on the heat storage layer 4, a scraper device 6 and a distribution device 7 are provided on one side of the drum 1, an air collecting hood 8 is provided above the drum 1, an air extraction port 9 is provided on the top of the air collecting hood 8, the air extraction port 9 is connected to the induced draft fan 10 and the heat medium channel of the heat exchanger 11 in sequence through a pipeline, a condensate outlet is provided on the heat medium channel of the heat exchanger 11, and the distribution device 7 is connected to the cold medium channel of the heat exchanger 11 and the liquid conveying device 13 in sequence through a pipeline.

[0020] Preferably, the heat exchanger 11 is a heat pipe heat exchanger; the cold and hot media of the heat pipe heat exchanger exchange heat through heat pipes, that is, the liquid in the cold medium channel exchanges heat with the condensing section of the heat pipe, and the water vapor in the hot medium channel exchanges heat with the evaporating section of the heat pipe. The heat pipe heat exchanger has the characteristics of high heat exchange efficiency and energy saving; the heat exchanger 11 can also be a jacketed, immersed, spray, plate, shell and tube, or fin heat exchanger.

[0021] Preferably, the rotating shaft 2 is provided with a heat-insulating layer 3 , and the heat-storage layer 4 is provided on the heat-insulating layer 3 ; the heat-insulating layer 3 is used to prevent the heat on the heat-storage layer 4 from being conducted to the rotating shaft 2 to cause heat loss.

[0022] Preferably, the thermal insulation layer 3 is made of glass fiber, aluminum silicate, or rock wool, the heat storage layer 4 is made of ceramic powder, sand, or metal powder, and the heat absorption layer 5 is made of metal, alloy, or graphite.

[0023] Preferably, a sunlight automatic tracking concentrator 14 is provided on one side of the drum 1, and the sunlight automatic tracking concentrator 14 is used to reflect sunlight onto the heat absorption layer 5; the sunlight automatic tracking concentrator 14 completely tracks the movement trajectory of the sun and reflects sunlight onto the heat absorption layer 5, and its incident angle is 0, thereby increasing the utilization rate of solar radiation.

[0024] Preferably, the condensate outlet of the heat exchanger 11 is connected to the condensate storage tank 12 through a pipeline; the condensate is stored in the condensate storage tank 12 for easy storage or treatment.

[0025] Preferably, the liquid material conveying device 13 is a feed pump, and the feed port of the liquid material conveying device 13 is connected to the liquid material storage tank 15 through a pipeline.

[0026] Preferably, a spiral discharging machine 16 is provided below the scraper device 6 ; the spiral discharging machine 16 is used to collect the dry material scraped off by the scraper device 6 .

[0027] Preferably, the distributing device 7 evenly coats the liquid material on the outer surface of the heat absorbing layer 5 through a coating roller; the distributing device 7 can also be a nozzle to evenly spray the liquid material onto the outer surface of the heat absorbing layer 5.

[0028] During operation, the heat absorption layer 5 absorbs solar heat and transfers the heat to the heat storage layer 4 for storage. The heat storage layer 4 enables the heat absorption layer 5 to continue to generate heat. The liquid conveying device 13 conveys the liquid to the cold medium channel of the heat exchanger 11 for heat exchange preheating. The preheated liquid enters the distribution device 7. The distribution device 7 evenly distributes the liquid on the outer surface of the heat absorption layer 5. The liquid absorbs the heat on the heat absorption layer 5 and gradually dehydrates to form a solid film. The scraper device 6 peels the solid film from the heat absorption layer 5 through the scraper to obtain dry material. The water vapor evaporated from the liquid feed flows through the air collecting hood 8 and the induced draft fan 10 in sequence, and then enters the heat medium channel of the heat exchanger 11 for heat exchange. The condensate generated during the heat exchange flows out from the condensate outlet, and the exhaust gas is discharged into the atmosphere. Since the drum 1 uses solar energy to dry the liquid feed, it can save a lot of energy consumption. The liquid feed is preheated by heat exchange with water vapor through the heat exchanger 11 in advance, and there is no need to provide additional heat energy to the heat exchanger 11, thereby improving the drying efficiency and saving energy consumption. The drum scraper dryer of this embodiment has the characteristics of low energy consumption and high drying efficiency.

[0029] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A drum scraper dryer, comprising a drum (1), characterized in that: The roller (1) comprises a rotating shaft (2), a heat storage layer (4) is provided on the outer side of the rotating shaft (2), a heat absorption layer (5) for absorbing solar heat is provided on the heat storage layer (4), a scraper device (6) and a distribution device (7) are provided on one side of the roller (1), an air collecting hood (8) is provided above the roller (1), an air extraction port (9) is provided on the top of the air collecting hood (8), the air extraction port (9) is connected to the induced draft fan (10) and the heat medium channel of the heat exchanger (11) in sequence through a pipeline, a condensate outlet is provided on the heat medium channel of the heat exchanger (11), and the distribution device (7) is connected to the cold medium channel of the heat exchanger (11) and the liquid conveying device (13) in sequence through a pipeline.

2. The drum scraper dryer according to claim 1, characterized in that: The heat exchanger (11) is a heat pipe heat exchanger.

3. The drum scraper dryer according to claim 1, characterized in that: A heat-insulating layer (3) is sleeved on the rotating shaft (2), and the heat-storage layer (4) is sleeved on the heat-insulating layer (3).

4. The drum scraper dryer according to claim 1, characterized in that: A sunlight automatic tracking concentrator (14) is provided on one side of the drum (1), and the sunlight automatic tracking concentrator (14) is used to reflect sunlight onto the heat absorption layer (5).

5. The drum scraper dryer according to claim 1, characterized in that: The condensate outlet of the heat exchanger (11) is connected to the condensate storage tank (12) through a pipeline.

6. The drum scraper dryer according to claim 1, characterized in that: The liquid material conveying device (13) is a feed pump, and the feed port of the liquid material conveying device (13) is connected to the liquid material storage tank (15) through a pipeline.

7. The drum scraper dryer according to claim 1, characterized in that: A spiral discharger (16) is provided below the scraper device (6).

8. The drum scraper dryer according to claim 1, characterized in that: The material distributing device (7) evenly distributes the liquid material on the outer surface of the heat absorbing layer (5) via a coating roller.

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