CN209857611U

CN209857611U - Hot-blast production of grain drying tower and conveyor

Info

Publication number: CN209857611U
Application number: CN201920468232.8U
Authority: CN
Inventors: 李景伟; 茆添翔
Original assignee: Mudanjiang Blue Environmental Protection Technology Co Ltd
Current assignee: Mudanjiang Blue Environmental Protection Technology Co Ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2019-12-27
Anticipated expiration: 2029-04-09

Abstract

A hot air generating and conveying device of a grain drying tower comprises a shell, a heat insulation layer, an air flowing space, a flame holding cavity and a heating smoke swirling and circulating pipeline; wherein: the flame holding cavity is communicated with the heating smoke swirling flow pipeline, and the air flowing space is respectively isolated from the flame holding cavity and the heating smoke swirling flow pipeline. The produced dry hot-blast grain drying tower that can directly carry through hot-blast pipeline of the device in according to practical application, can solve the hot-blast remote transport of prior art and cause the too high problem of calorific loss, reduced the energy resource consumption, this hot-blast production of grain drying tower and conveyor have adopted the two-stage heat transfer structure moreover, and the heat exchange is abundant, can also further improve energy utilization efficiency, effective energy-conserving energy reduces grain stoving processing cost. Meanwhile, the external burner completely uses clean energy, so that natural resources can be saved, environmental pollution is reduced, and good social and ecological benefits are achieved.

Description

Hot-blast production of grain drying tower and conveyor

Technical Field

The utility model relates to a hot-blast production and conveyor, in particular to hot-blast production of grain drying tower and conveyor.

Background

The grain drying tower is a building facility for drying grain flow in the tower by utilizing flowing hot air to reduce the water content of grain, and the working principle of the grain drying tower is that drying hot air with different temperatures is conveyed to the grain drying tower on different horizontal planes through a plurality of drying hot air conveying pipelines to form a temperature gradient in the grain drying tower so as to dry the grain flow moving downwards in the grain drying tower. At present, the production method of hot drying air is to use a large-scale coal-fired boiler far away from a grain storage area to intensively produce heat, then use a heat exchange device to heat drying air, convey the drying air to the grain storage area through a long-distance pipeline, and convey the drying air into a grain drying tower through branch dry pipelines of the grain drying tower after temperature control and adjustment, so as to realize the technical process of grain drying. However, because the mode of long-distance centralized heat production and long-distance transportation is adopted, the problem of high heat loss rate exists in actual production, the heat loss rate can reach more than 40% generally, the energy waste is serious, the grain drying and processing cost is increased, meanwhile, the heat produced by the coal-fired boiler is used, primary energy is used, natural resources are wasted, the ecological environment is damaged, and the problems of prominent environmental pollution and environmental protection exist. Therefore, the development and application of the hot air generating and conveying device for grain drying, which saves energy, is beneficial to environmental protection and has higher operation efficiency, is a directional topic in the field of grain storage and processing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hot-blast production of grain drying tower and conveyor reduces energy consumption, reduces environmental pollution, improves drying efficiency.

A hot air generating and conveying device of a grain drying tower comprises a shell 10, a heat insulation layer 11 arranged outside the shell 10, an air flowing space 20 arranged in the shell 10, a flame holding cavity 30 and a heating smoke swirling flow pipeline 40; wherein: the flame holding chamber 30 is communicated with the heating flue gas swirling flow passage 40, and the air flowing space 20 is isolated from the flame holding chamber 30 and the heating flue gas swirling flow passage 40, respectively.

On the housing 10, a cold air introduction hole 1 is formed at a lower portion of a position communicating with the air flowing space 20, a hot air discharge hole 2 is formed at an upper portion of the housing, a heating hole 3 is formed at a position communicating with the flame holding chamber 30, the heating hole 3 is used for connecting with an external burner 7, heating flame is introduced into the flame holding chamber 30, and a flue gas discharge port 4 is formed at a top end of a position communicating with the heated flue gas swirling flow pipe 40 for discharging combustion waste gas.

The heating smoke circulating pipeline 40 is a heat conducting metal pipe, consists of a primary circulating pipeline 40a and a secondary circulating pipeline 40b, is arranged in the air flowing space 20, and exchanges heat with circulating air in the air flowing space 20; the primary rotary pipelines 40a are distributed along the outer wall of the flame holding cavity 30 and used for guiding the heating flue gas in the flame holding cavity 30 to generate 360-degree rotation at the first rotation area 41 and guiding the heating flue gas to the second rotation area 42, the number of the primary rotary pipelines 40a is 12-28, in order to improve the heat radiation efficiency of the primary revolving duct 40a, it is preferable that the primary revolving duct 40a is provided with a heat radiation fin 43, the number of the secondary rotary pipelines 40b is 6-18, and the secondary rotary pipelines are used for guiding the heating flue gas to rotate for 360 degrees again at the second rotary area 42, so that the heating flue gas which completes primary heat exchange through the primary rotary pipeline 40a passes through the secondary rotary pipeline 40b for secondary heat exchange, the heat utilization efficiency of the heating flue gas is fully improved, and the heating flue gas after heat exchange is finally guided to the flue gas discharge port 4 to be discharged into the atmospheric environment.

Further, a temperature sensor 6 is installed at the hot air exhaust hole 2, and the combustion intensity of an external burner is adjusted by monitoring the exhaust temperature of the heated air, so that the temperature of the heated air introduced into the grain drying tower through the hot air exhaust hole 2 is controlled, the grain drying efficiency is improved, and the grain drying effect is ensured; meanwhile, the shell 10 is also provided with an observation hole 5 for observing the flame combustion condition in the flame holding cavity 30; the external burner 7 selected for matching preferably uses clean energy such as environment-friendly fuel oil or natural gas.

The method for installing and using the hot air generating and conveying device of the grain drying tower comprises the steps of installing a plurality of sets of the hot air generating and conveying device 70 of the grain drying tower, the number of which is the same as that of hot air conveying pipelines 61 of a grain drying tower 60, at the bottom of the grain drying tower 60, respectively connecting the hot air exhaust holes 2 with the hot air conveying pipelines 61 correspondingly, installing external burners 7 on the heating holes 3, enabling flames generated by the external burners 7 to be sprayed into the flame holding cavity 30 through the heating holes 3 and enter the heating flue gas rotary circulation pipeline 40, in the grain drying process, forcibly circulating cold air from the inlet holes 1 through an induced draft fan, and exhausting dry heating air from the exhaust holes 2 through heat exchange of the heating flue gas rotary circulation pipeline 40 in the air flowing space 20, and is guided into the grain drying tower 60 through the hot air conveying pipeline 61, so as to realize the drying treatment of the grain flow in the grain drying tower 60.

The utility model has the advantages that the hot air generating and conveying device of the grain drying tower used in the grain storage area is provided, the dry hot air generated by the device can be directly conveyed to the grain drying tower through the hot air conveying pipeline, the problem of overhigh heat loss caused by the long-distance conveying of the hot air is solved, the energy consumption is reduced, and the hot air generating and conveying device of the grain drying tower adopts a two-stage heat exchange structure, the heat exchange is sufficient, the energy utilization efficiency can be further improved, the energy is effectively saved, and the grain drying processing cost is reduced; meanwhile, the external burner completely uses clean energy, so that natural resources can be saved, environmental pollution is reduced, and good social and ecological benefits are achieved.

Drawings

Fig. 1 is a main sectional view of a hot air generating and conveying device of a grain drying tower.

Fig. 2, a side sectional view of section B-B in fig. 1.

Fig. 3 is a schematic diagram of the application position of the hot air generating and conveying device of the grain drying tower.

Fig. 4 is a working principle diagram of a hot air generating and conveying device of a grain drying tower.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical solution claimed in the present invention is further described below with reference to the following specific embodiments and accompanying drawings.

A hot air generating and conveying device of a grain drying tower is shown in figures 1 and 2 and comprises a shell 10, a heat insulation layer 11 arranged outside the shell 10, an air flowing space 20 arranged in the shell 10, a flame holding cavity 30 and a heating smoke swirling circulation pipeline 40; the lower region of the housing 10 is a cylindrical structure, the upper portion is a rectangular box structure having the same length as the cylindrical structure, the flame holding cavity 30 is in a cylindrical shape coaxial with the cylindrical structure of the lower region of the shell 10, a primary swirl pipe 40a is arranged in parallel with the flame holding cavity 30, 24 pieces are uniformly arranged along the outer circumference of the flame holding cavity 30, the outer surface of the primary rotary pipe 40a is provided with a heat radiation fin 43, the secondary rotary pipe 40b and the primary rotary pipe 40a are parallel to each other and arranged in the rectangular box structure of the upper region of the outer casing 10, 12 pieces of the flue gas are uniformly arranged in a matrix arrangement mode, and a space area formed between the inner part of the outer shell 10 and the flame holding cavity 30 and the outer part of the heating flue gas rotary circulation pipeline 40 and between the outer shell 10 and the flame holding cavity 30 is the air flowing space 20.

On the shell 10, the longitudinal position of the cold air inlet hole 1 and the longitudinal position of the hot air outlet hole 2 are staggered and respectively arranged on the bottom and the top of the shell 10, the heating hole 3 is arranged on the axial position of one side end part of the cylindrical structure of the lower area of the shell 10, the observation hole 5 is arranged on the end surface opposite to the other side end part, and the smoke discharge port 4 is also arranged on the top position of the shell 10.

The external combustor 7 takes environment-friendly fuel oil as fuel, and the combustion intensity is adjustable in two stages, namely 60 kg/h and 30 kg/h; the hot air exhaust hole 2 is provided with a temperature sensor 6, when the temperature sensor 6 detects that the temperature of the heating flue gas is greater than a preset rated value, the system controls the external combustor 7 to work with the low-grade combustion intensity of 30 kg/h, otherwise, when the temperature of the heating flue gas is detected to be less than the preset rated value, the system controls the external combustor 7 to work with the high-grade combustion intensity of 60 kg/h.

Through monitoring the heated air exhaust temperature, use a hot-blast production of grain drying tower and conveyor, as shown in fig. 3, a hot-blast production of grain drying tower and conveyor 70 install respectively in the bottom portion of each hot-blast transfer piping 61 of grain drying tower 60, with every hot-blast discharge hole 2 on a hot-blast production of grain drying tower and conveyor correspond with hot-blast transfer piping 61 intercommunication links together, by the drive of draught fan dry heated air in the air flow space 20 in shell 10 flows in succession, and outside combustor 7 is installed on hot-blast hole 3.

When the hot air generating and conveying device for the grain drying tower works, as shown in fig. 4, the flame generated by the operation of the external burner 7 is continuously sprayed into the flame holding cavity 30 through the heating hole 3, the continuously generated heating flue gas enters the first rotating area 41 from the other end of the flame holding cavity 30, 360-degree rotation is generated at the first rotating area 41 and enters the primary rotating pipeline 40a, the heating flue gas is guided into the second rotating area 42 after primary heat exchange, the heating flue gas generates 360-degree rotation again in the second rotating area 42 and enters the secondary rotating pipeline 40b, and the heating flue gas is discharged into the atmospheric environment from the flue gas discharge port 4 after secondary heat exchange; in the flowing process of the heating flue gas, the air in the air flowing space 20 is driven by the induced draft fan to form a unidirectional flowing air flow, the flowing air flows in the air flowing space 20 after being subjected to two times of heat exchange with the heating flue gas swirling flow pipeline 40, the air is dried and heated, the temperature is gradually increased, the ambient air flows in from the cold air introducing hole 1, the air is gradually subjected to heat exchange and temperature rise in the air flowing space 20 to generate dry and heated air, the discharged dry and heated air enters the hot air conveying pipeline 61 of the grain drying tower in the flowing process of flowing out of the hot air discharging hole 2, and the dry and heated air is further driven by the induced draft fan to be conveyed to the grain drying tower 60 to dry the grain flow.

Claims

1. The utility model provides a hot-blast production of grain drying tower and conveyor which characterized in that: comprises a shell (10), a heat insulation layer (11) arranged outside the shell (10), an air flowing space (20) arranged in the shell (10), a flame holding cavity (30) and a heating smoke swirling flow pipeline (40); wherein: the flame holding cavity (30) is communicated with the heating smoke swirling flow pipeline (40), and the air flowing space (20) is respectively isolated from the flame holding cavity (30) and the heating smoke swirling flow pipeline (40);

on the shell (10), a cold air leading-in hole (1) is arranged at the lower part of the position communicated with the air flowing space (20), a hot air discharging hole (2) is arranged at the upper part of the position communicated with the flame holding cavity (30), a heating hole (3) is arranged at the position, and a smoke discharging hole (4) is arranged at the top end of the position communicated with the heating smoke circulating pipeline (40);

the heating smoke circulating pipeline (40) is a heat-conducting metal pipe, consists of a primary circulating pipeline (40 a) and a secondary circulating pipeline (40 b) and is arranged in the air flowing space (20); the primary rotary pipelines (40 a) are arranged along the outer wall of the flame containing cavity (30), the number of the primary rotary pipelines is 12-28, and the number of the secondary rotary pipelines (40 b) is 6-18.

2. The grain drying tower hot air generating and conveying device of claim 1, wherein: the primary revolving pipe (40 a) is provided with a heat radiation fin (43).

3. The hot air generating and conveying device of the grain drying tower as claimed in claim 1 or 2, wherein: an observation hole (5) is arranged on the shell (10).

4. The grain drying tower hot air generating and conveying device of claim 3, wherein: a temperature sensor (6) is mounted at the hot air discharge hole (2).

5. The grain drying tower hot air generating and conveying device of claim 1, wherein: the flame holding cavity (30) is in a cylindrical shape coaxial with the cylindrical structure in the lower part of the shell (10), a primary rotary pipeline (40 a) and the flame holding cavity (30) are arranged in parallel and are uniformly arranged along the outer circumference of the flame holding cavity (30), and a secondary rotary pipeline (40 b) and the primary rotary pipeline (40 a) are parallel and are arranged in the rectangular box structure in the upper part of the shell (10) and are uniformly arranged according to an array arrangement mode.

6. The grain drying tower hot air generating and conveying device of claim 5, wherein: on the shell (10), the longitudinal positions of a cold air introducing hole (1) and a hot air discharging hole (2) are staggered and are respectively arranged at the bottom and the top of the shell (10), a heating hole (3) is arranged at the axial center position of one end part of a cylindrical structure in the lower area of the shell (10), an observation hole (5) is arranged at the end surface opposite to the other end part, and a smoke discharging hole (4) is also arranged at the top position of the shell (10).