Efficient three-backflow hot air heating system of spray drying tower

Abstract

The utility model provides an efficient three-backflow hot air heating system of a spray drying tower, which relates to the technical field of food and medicine chemical drying and comprises a backflow type electric heater, one end of the backflow type electric heater is connected with an exhaust fan and an electric cabinet, the other end of the backflow type electric heater is connected with the drying tower, and the middle of the backflow type electric heater is of a barrel structure. An outer shell, an isolation barrel and an air guide pipe are sequentially arranged from outside to inside, a cold air preheating area is arranged between the outer shell and the isolation barrel, an electric heating pipe is arranged in the isolation barrel, and cold air coming out of an exhaust fan enters from the bottom of a backflow type electric heater, is in an S shape from bottom to top and sequentially passes through the cold air preheating area, the isolation barrel and the air guide pipe to be heated. And the heated hot air is discharged from the top end of the backflow type electric heater to the drying tower. Cold air is preheated through the electric heating heat dissipation area, the heat efficiency is high, operation is easy and convenient, and continuous operation is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to food medicine chemical industry drying technical field especially relates to a spray drying tower high -efficient three backflow hot -blast heating system. BACKGROUND

[0002] At present, the production mode of the heat preservation electric heating box centralized heating is often adopted in the spray drying production process, which is easy to cause the problems of hot air short circuit and uneven distribution of hot air, and further causes the conditions of partial electric heating tube overheating and easy to damage, inconsistent actual working conditions of electric heating tube and frequent replacement of damaged electric heating tube.

[0003] Therefore, how to reasonably arrange the air duct to meet the two-stage heating, fully utilize the heat of the heat dissipation section of the electric heater and prolong the service life of the equipment is a technical problem to be solved at present.

[0004] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0005] The utility model discloses a spray drying tower high -efficient three backflow hot -blast heating system, and heat recovery of the heat dissipation section of electric heater and electric heating forced heating area are combined as a whole operation system, and the heat of the heat dissipation section of electric heater in the spray drying process is effectively recovered and utilized by gradient cold air.

[0006] The utility model discloses a spray drying tower high -efficient three backflow hot -blast heating system, and heat recovery of the heat dissipation section of electric heater and electric heating forced heating area are combined as a whole operation system, and the heat of the heat dissipation section of electric heater in the spray drying process is effectively recovered and utilized by gradient cold air.

[0007] Further, the bottom end of the backflow type electric heater is provided with an air inlet filter, and the cold air from the air exhaust fan enters the backflow type electric heater after entering the air inlet filter first.

[0008] Further, the lower part of the backflow type electric heater is provided with an electric heating pipe fixing plate, and the electric heating pipe is fixed on the electric heating pipe fixing plate, and a ventilation hole is formed in the electric heating pipe fixing plate.

[0009] Further, the bottom of the backflow type electric heater is further provided with a support.

[0010] Further, a junction box is connected to the side wall of the electric heating tube of the backflow type electric heater, and the junction box is connected to the electric control box.

[0011] Further, an end plate is arranged on the top of the backflow type electric heater, the end plate is an annular plate, the outer side wall of the end plate is fixed to the inner side wall of the outer shell, and the inner side wall of the end plate is fixed to the air guide pipe.

[0012] Further, a conical hot air outlet is further arranged on the top of the backflow type electric heater.

[0013] Further, the backflow type electric heater is connected to the drying tower through an air inlet pipe, the bottom of the drying tower is connected to a cyclone separator through a connecting pipe, the exhaust fan is fixed to the cyclone separator, and an air outlet pipe is further arranged at the top end of the cyclone separator.

[0014] Compared with the prior art, the backflow type electric heater has the following advantages:

[0015] 1. The backflow type electric heater is used, the cold air preheating area is formed between the outer shell and the isolation cylinder of the backflow type electric heater, the hot air forced heating area is formed in the isolation cylinder, the air guide pipe is arranged in the middle part, the air inlet filter is arranged at the lower part, the cold air enters the cold air preheating area through the air inlet filter, then enters the hot air forced heating area, and then is discharged through the hot air outlet after passing through the air guide pipe; the cold air continuously enters through the air inlet filter, and the cold air enters each passage by turning when working, so that the heat of each section is fully utilized, and the high energy-saving effect is achieved.

[0016] 2. The electric heating tube is fixed by the electric heating tube fixing plate with ventilation holes, the cold air first passes through the preheating air channel between the outer shell and the isolation cylinder, is preheated, then passes through the electric heating tube forced heating channel between the isolation cylinder and the air guide pipe for secondary heating, and then is discharged to the hot air outlet in the air guide pipe, so that the gradient heating performance of air is guaranteed, and the high thermal efficiency is guaranteed.

[0017] 3. The end plate and the electric heating tube fixing plate form a turning S-shaped channel, the preheated air and the forced heated air sequentially flow and continuously work, and the purpose of circulating heating is achieved. DRAWINGS

[0018] Fig. 1 It is a front view structural schematic diagram of the spray drying tower high-efficiency three-backflow hot air heating system.

[0019] Fig. 2 It is a top view structural schematic diagram of the spray drying tower high-efficiency three-backflow hot air heating system.

[0020] Fig. 3 It is a structural schematic diagram of the backflow type electric heater.

[0021] Wherein, 1 - exhaust fan; 2 - electric control box; 3 - backflow type electric heater; 31 - air inlet filter; 32 - hot air outlet; 33 - end plate; 34 - air duct; 35 - isolation cylinder; 36 - outer shell; 37 - electric heating tube; 38 - electric heating tube fixing plate; 4 - exhaust pipe; 5 - air inlet pipe; 6 - drying tower; 7 - cyclone separator; 8 - connecting pipe; 9 - junction box; 10 - support. DETAILED DESCRIPTION

[0022] The embodiments of the present application will be described in detail below with reference to the examples, but those skilled in the art will understand that the following examples are only for illustration of the present application and should not be regarded as limiting the scope of the present application.

[0023] According to the embodiments of the present application, the high-efficiency three-backflow hot air heating system of the spray drying tower comprises an exhaust fan 1, an electric control box 2, a backflow type electric heater 3, an exhaust pipe 4, an air inlet pipe 5, a drying tower 6 and a cyclone separator 7, and is sequentially provided with the exhaust fan 1, the backflow type electric heater 3, the exhaust pipe 4, the air inlet pipe 5, the drying tower 6 and the cyclone separator 7 in the order of cold air - heated cold air - entering the drying tower, and the electric control box 2 supplies power to each structure. Figs. 1-3

[0024] According to the embodiments of the present application, the middle part of the backflow type electric heater 3 is a cylinder structure, and is sequentially provided with an outer shell 36, an isolation cylinder 35 and an air duct 34 from outside to inside, a cold air preheating area is formed between the outer shell 36 and the isolation cylinder 35, an electric heating tube 37 is arranged in the isolation cylinder 35, and the area in the isolation cylinder 35 is a hot air forced heating area. The cold air from the exhaust fan 1 enters the bottom of the backflow type electric heater 3, forms an S shape from bottom to top, and is sequentially heated in the cold air preheating area, the isolation cylinder 35 and the air duct 34, and then the heated hot air is discharged from the top end of the backflow type electric heater 3 and enters the drying tower 6. An air inlet filter 31 is arranged at the bottom of the backflow type electric heater 3, and the cold air from the exhaust fan 1 first enters the air inlet filter 31 and then enters the backflow type electric heater 3. The cold air continuously enters the backflow type electric heater 3 from the air inlet filter 1, and each passage is folded and enters when working, so that the heat of each section is fully utilized, and the energy-saving effect is high. Moreover, the cold air can fully utilize the heat of the heat dissipation section, absorb the heat, and then enter the hot air forced heating area, and the generated hot air is discharged through the air duct 34.

[0025] ​According to the embodiment of the utility model, the lower part of the reflux type heater 3 is provided with an electric heating pipe fixing plate 38, specifically, the electric heating pipe fixing plate 38 is arranged horizontally, the electric heating pipe 37 is fixed on the electric heating pipe fixing plate 38, a ventilation hole is formed on the electric heating pipe fixing plate 38, the ventilation hole is arranged correspondingly in the cold air preheating area, and the cold air entering through the air inlet filter 31 can enter the cold air preheating area conveniently. Correspondingly, the electric heating pipe fixing plate 38 at the hot air heating forced area and the air guide pipe 34 is a closed plate. The top of the reflux type electric heater 3 is provided with an end plate 33, the end plate 33 is an annular plate, the outer side wall of the end plate 33 is fixed on the inner side wall of the outer shell 36, and the inner side wall of the end plate 33 is fixed on the air guide pipe 34. The end plate 33 and the electric heating pipe fixing plate 38 form a zigzag S-shaped channel, the preheated air and the forced heating air flow in order and work continuously, and the circulation heating work can be carried out.

[0026] Further, the cold air first passes through the cold air preheating channel between the outer shell 36 and the isolation cylinder 35, is preheated, then passes through the electric heating pipe forced heating channel between the isolation cylinder 35 and the air guide pipe 34 for secondary heating, and then is discharged to the hot air outlet 32 in the air guide pipe 34, so that the gradient heating performance of the cold air is ensured, and the high thermal efficiency is ensured sufficiently.

[0027] According to the embodiment of the utility model, the reflux type heater 3 can provide independent preheating and forced heating two-stage work for the cold air.

[0028] According to the embodiment of the utility model, the bottom of the reflux type heater 3 is further provided with a support 10 for bearing support, and the support 10 is fixed on the support fixed on the ground. The side wall of the reflux type electric heater 3 close to the electric heating pipe 37 is connected with a junction box 9, the junction box 9 is connected with the electric control box 2, the electric heating pipe 37 is connected with the electric wire of the junction box 9, and the power supply in the electric control box 2 supplies power to the electric heating pipe 37 through the junction box 9.

[0029] According to the embodiment of the utility model, the top of the reflux type electric heater 3 is further provided with a conical hot air outlet 32.

[0030] According to the embodiment of the utility model, the reflux type electric heater 3 is connected with the drying tower 6 through the air inlet pipe 5, the bottom of the drying tower 6 is connected with the cyclone separator 7 through the connecting pipe 8, the exhaust fan 1 is fixed on the cyclone separator 7, and the top end of the cyclone separator 7 is further provided with the exhaust pipe 4.

[0031] The utility model discloses a spray drying tower high -efficient three backflow hot -blast heating system, including backflow type electric heater 3, electric cabinet 2, exhaust fan 1, cyclone separator 7, exhaust pipe 4 and drying tower 6, and the above system connection combination is spray drying tower high -efficient three backflow hot -blast heating system, wherein backflow type electric heater 3 is the core main part, and backflow type electric heater 3 is multilayer flow guide pipe structure, and the center inner ring is the installation area of electric heating pipe 37, and the inner tube is air guide pipe 34. Backflow type hot -blast heater 3 is formed by inlet filter 31, electric heating pipe 37, outer shell 36, isolation cylinder 35, air guide pipe 34, end plate 33, hot -blast outlet 32, support 10, junction box 9 etc. When working, cold air is inhaled from inlet filter 31, preheats and heats up in the cold air preheating area between outer shell 36 and isolation cylinder 35, then enters the electric heating area of hot -blast forced heating between isolation cylinder 35 and air guide pipe 34, and the heated hot -blast is discharged from air guide pipe 34 and enters drying tower 6 to reach the purpose of heat comprehensive utilization. The hot -blast heating system of the utility model has the advantages of easy material selection, small heat loss, cold air preheating in electric heating heat dissipation area, high thermal efficiency, simple operation, continuous operation and the like.

[0032] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and the like terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside communication or two element's mutual action relation. For ordinary skilled person in the art, the above terms can be understood according to the concrete meaning in the utility model.

[0033] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradicting each other.

Claims

1. A high efficiency three reflux hot air heating system for a spray drying tower, characterized by, The utility model relates to a kind of drying tower, including: Reflux electric heater (3), one end of the reflux electric heater (3) is connected with exhaust fan (1) and electric control box (2), the other end is connected with drying tower (6), The middle part of the reflux electric heater (3) is barrel structure, outer shell (36) is sequentially arranged from outside to inside in the barrel structure, isolation cylinder (35) and air duct (34), and cold air preheating area is between the outer shell (36) and isolation cylinder (35), electric heating tube (37) is arranged in the isolation cylinder (35), cold air from exhaust fan (1) enters the bottom of reflux electric heater (3), from bottom to top S type, sequentially passes through cold air preheating area, isolation cylinder (35) and air duct (34) and is heated, and hot air after being heated is discharged from the top end of reflux electric heater (3) and reaches drying tower (6).

2. The spray drying column high efficiency three reflux hot air heating system according to claim 1, characterized in that, The bottom end of the reflux electric heater (3) is provided with air inlet filter (31), and cold air from exhaust fan (1) first enters air inlet filter (31) and then enters reflux electric heater (3).

3. The spray drying column high efficiency three reflux hot air heating system according to claim 1, characterized in that, The lower part of the reflux electric heater (3) is provided with electric heating tube fixing plate (38), and the electric heating tube (37) is fixed on the electric heating tube fixing plate (38), and ventilation hole is formed in the electric heating tube fixing plate (38).

4. The spray drying column high efficiency three reflux hot air heating system according to claim 1, characterized in that, The bottom of the reflux electric heater (3) is also provided with support (10).

5. The spray drying column high efficiency three reflux hot air heating system according to claim 1, characterized in that, The side wall of the reflux electric heater (3) close to electric heating tube (37) is connected with junction box (9), and the junction box (9) is connected with electric control box (2).

6. The spray drying column high efficiency three-pass hot air heating system of claim 1, wherein, The top of the reflux electric heater (3) is provided with end plate (33), and the end plate (33) is annular plate, the outer side wall is fixed on the inner side wall of outer shell (36), and the inner side wall is fixed on air duct (34).

7. The spray drying column high efficiency three-pass hot air heating system of claim 1, wherein, The top of the reflux electric heater (3) is also provided with conical hot air outlet (32).

8. The spray drying column high efficiency three-pass hot air heating system of claim 1, wherein, The reflux electric heater (3) is connected with drying tower (6) through air inlet pipe (5), the bottom of the drying tower (6) is connected with cyclone separator (7) through connecting pipe (8), and the exhaust fan (1) is fixed on the cyclone separator (7), The top end of the cyclone separator (7) is also provided with exhaust pipe (4).

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