阅读说明：本技术 一种带式烘干机燃气供热系统 (Gas heating system of belt dryer ) 是由 郝波 张正礼 史文杰 吕云凯 蒋曦 于 2021-10-28 设计创作，主要内容包括：本发明尤其涉及一种带式烘干机燃气供热系统,包括壳体、天然气燃烧机、燃烧筒组件、混风组件和循环风机,壳体内依次设有进风室、燃烧室、混风室和出风室,燃烧筒组件包括大圆筒和小圆筒,大圆筒、小圆筒和燃烧机的燃烧头依次逐节同轴套接,大圆筒与小圆筒和壳体之间均具有混风间隙,大圆筒位于燃烧室内,小圆筒和燃烧头均位于进风室内,小圆筒上贯穿有若干进风孔；混风组件设在燃烧室和混风室之间,混风组件包括挡火锥和位于挡火锥两侧的混风网,挡火锥与大圆筒的出口相对设置；进风室上设有进风口、排湿风阀和补风口,进风口内设有过滤装置,进风室、燃烧室、混风网、混风室和出风室依次连通,循环风机用于将出风室的混合热风从其出风口排出。(The invention especially relates to a belt dryer gas heating system, which comprises a shell, a natural gas burner, a combustion barrel assembly, an air mixing assembly and a circulating fan, wherein an air inlet chamber, a combustion chamber, an air mixing chamber and an air outlet chamber are sequentially arranged in the shell; the air mixing component is arranged between the combustion chamber and the air mixing chamber, the air mixing component comprises a fire blocking cone and air mixing nets positioned on two sides of the fire blocking cone, and the fire blocking cone is arranged opposite to the outlet of the large cylinder; the air inlet chamber is provided with an air inlet, a moisture exhaust air valve and an air supplement port, the air inlet is internally provided with a filtering device, the air inlet chamber, the combustion chamber, the air mixing net, the air mixing chamber and the air outlet chamber are communicated in sequence, and the circulating fan is used for discharging the mixed hot air in the air outlet chamber from the air outlet.)

1. The utility model provides a belt dryer gas heating system which characterized in that: the natural gas burner is characterized by comprising a shell (1), a natural gas burner (2), a combustion barrel assembly (3), an air mixing assembly (4) and a circulating fan (5), wherein an air inlet chamber (11), a combustion chamber (12), an air mixing chamber (13) and an air outlet chamber (14) are sequentially arranged in the shell (1), the combustion barrel assembly (3) comprises a large barrel (31) and a small barrel (32), the large barrel (31), the small barrel (32) and a combustion head (21) of the natural gas burner (2) are sequentially coaxially sleeved section by section, air mixing gaps are formed among the large barrel (31), the small barrel (32) and the shell (1), the large barrel (31) is positioned in the combustion chamber (12), the small barrel (32) and the combustion head (21) are positioned in the air inlet chamber (11), and a plurality of air inlet holes (321) penetrate through the small barrel (32);

the air mixing component (4) is arranged between the combustion chamber (12) and the air mixing chamber (13), the air mixing component (4) comprises a fire blocking cone (41) and air mixing nets (42) positioned on two sides of the fire blocking cone (41), the fire blocking cone (41) gradually inclines towards the air mixing nets (42) on two sides from the combustion chamber (12), and the fire blocking cone (41) is arranged opposite to an outlet of the large cylinder (31);

the air inlet chamber (11) is provided with an air inlet (15), a moisture exhaust air valve (6) and an air supplementing opening (16), a filtering device (7) is arranged in the air inlet (15), the air inlet chamber (11), the combustion chamber (12), the air mixing net (42), the air mixing chamber (13) and the air outlet chamber (14) are communicated in sequence, the air outlet chamber (14) is provided with an air outlet (17), and the circulating fan (5) is used for discharging mixed hot air in the air outlet chamber (14) from the air outlet (17).

2. The belt dryer gas heating system of claim 1, wherein: a flame-retardant net (8) is arranged between the air mixing chamber (13) and the air outlet chamber (14), and the air mixing chamber (13) and the air outlet chamber (14) are communicated through the flame-retardant net (8).

3. The belt dryer gas heating system according to claim 1 or 2, wherein: the air inlet hole (321) is arranged at one end, close to the combustion head (21), of the small cylinder (32), the air inlet hole (321) is arranged opposite to the combustion head (21), and the air inlet hole (321) is uniformly distributed around the circumference of the small cylinder (32).

4. The belt dryer gas heating system according to claim 1 or 2, wherein: the large cylinder (31) is fixedly connected with the shell (1) through a first support (33), and the small cylinder (32) is fixedly connected with the large cylinder (31) through a second support (34).

5. The belt dryer gas heating system according to claim 1 or 2, wherein: the filtering device (7) is detachably arranged in the air inlet (15) through a drawer type structure.

6. The belt dryer gas heating system according to claim 1 or 2, wherein: the filtering device (7) and the air mixing net (42) are both high-temperature-resistant stainless steel woven nets, and the fire blocking cone (41) is also made of high-temperature-resistant stainless steel.

7. The belt dryer gas heating system according to claim 1 or 2, wherein: the air inlet (15) is arranged below the shell (1), the moisture exhaust air valve (6) and the air supplement port (16) are both arranged above the shell (1), and an air inlet pipe (61) of the moisture exhaust air valve (6) is lower than the small cylinder (32).

8. The belt dryer gas heating system according to claim 1 or 2, wherein: be provided with access door (18) on casing (1), casing (1) is supported by frame (9), frame (9) adopt the shaped steel welding to form.

Technical Field

The invention belongs to the technical field of dryer heat supply equipment, and particularly relates to a belt dryer gas heat supply system.

Background

The belt dryer is a continuous drying device for batch production, is used for drying sheet, strip and granular materials with good air permeability, and is particularly suitable for granular materials such as aquatic products, pets and the like. In recent years, China implements a green low-carbon development strategy, and continuously accelerates the development step of low-carbon energy, compared with the traditional coal-fired steam boilers, the natural gas has low thermal efficiency and high pollutant emission concentration, can directly supply heat by being used as a clean and environment-friendly fuel, has high thermal efficiency and obvious advantages, and has a certain trend of continuously replacing the traditional coal-fired steam boilers by the natural gas. The coal-fired steam heating system of the belt dryer is gradually replaced by a natural gas direct-fired heating system.

The natural gas direct-fired heating system of the present belt dryer has the following problems in structure more or less: 1. the local serious overheating in the heating system is very easy to cause the potential safety hazard of ignition; 2. the hot air is not mixed uniformly, so that the air temperature is unstable, and the drying effect is poor; 3. potential safety hazards such as material cross contamination, ignition and the like caused by substandard circulating air filtration; 4. the flame of the natural gas burner is affected by circulating wind and is not fully combusted; 5. the natural gas combustor is influenced by the circulated air and can not ignite.

Disclosure of Invention

The invention provides a belt dryer gas heating system, aiming at solving the problems of local serious overheating, uneven hot air mixing, substandard filtering, insufficient combustion, easy ignition and the like in a natural gas direct-fired heating system in the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme that the belt dryer gas heating system comprises a shell, a natural gas burner, a combustion barrel assembly, an air mixing assembly and a circulating fan, wherein an air inlet chamber, a combustion chamber, an air mixing chamber and an air outlet chamber are sequentially arranged in the shell, the combustion barrel assembly comprises a large barrel and a small barrel, combustion heads of the large barrel, the small barrel and the natural gas burner are sequentially coaxially sleeved section by section, air mixing gaps are respectively arranged between the large barrel, the small barrel and the shell, the large barrel is positioned in the combustion chamber, the small barrel and the combustion heads are respectively positioned in the air inlet chamber, and a plurality of air inlet holes penetrate through the small barrel;

the air mixing component is arranged between the combustion chamber and the air mixing chamber, the air mixing component comprises a fire blocking cone and air mixing nets positioned on two sides of the fire blocking cone, the fire blocking cone gradually inclines towards the air mixing nets on two sides from the combustion chamber, and the fire blocking cone is arranged opposite to the outlet of the large cylinder;

the air inlet chamber is provided with an air inlet, a moisture exhaust air valve and an air supplement port, a filtering device is arranged in the air inlet, the air inlet chamber, the combustion chamber, the air mixing net, the air mixing chamber and the air outlet chamber are communicated in sequence, the air outlet chamber is provided with an air outlet, and the circulating fan is used for discharging mixed hot air in the air outlet chamber from the air outlet.

Preferably, a flame-retardant net is arranged between the air mixing chamber and the air outlet chamber, and the air mixing chamber and the air outlet chamber are communicated through the flame-retardant net. The circulating air after drying the materials enters the heat supply system through the air inlet and is sequentially filtered by the filtering device and the air mixing net, and when fine materials which are not filtered completely in the circulating air meet flame for combustion, the fine materials can be further filtered through the flame-retardant net, so that fire disasters caused by the fact that sparks are brought into the circulating fan or the drying machine or pollution to the materials is caused by the fact that burning ash enters the drying machine are prevented.

Preferably, the air inlet holes are formed in one end, close to the combustion head, of the small cylinder, the air inlet holes are arranged opposite to the combustion head, and the air inlet holes are evenly distributed around the circumference of the small cylinder. Due to the arrangement of the small cylinder and the air inlet hole, when the natural gas burner burns, part of circulating air entering from the air inlet hole can take away heat at the burning head, so that the internal components of the burning head cannot be damaged due to overhigh temperature at the burning head; the natural gas is prevented from being taken away quickly by overlarge circulating air, the combustion flame can be protected from being influenced by the circulating air, and the natural gas is ensured to be fully combusted; and avoid too big circulating wind directly to blow out flame, cause the combustion head to ignite unusually.

Preferably, the large cylinder is fixedly connected with the shell through a first support, and the small cylinder is fixedly connected with the large cylinder through a second support. The large cylinder and the small cylinder are convenient to arrange, and the large cylinder and the small cylinder are reasonable and reliable in arrangement.

Preferably, the filtering device is detachably arranged in the air inlet through a drawer type structure. The filter device is convenient to clean or replace.

Furthermore, filter equipment and mixed wind net are high temperature resistant stainless steel mesh grid, the material of keeping off the fire awl also is high temperature resistant stainless steel material.

Furthermore, the air inlet is arranged below the shell, the moisture exhaust air valve and the air supplement port are both arranged above the shell, and an air inlet pipe of the moisture exhaust air valve is lower than the small cylinder. The circulating air can enter the device conveniently, and the air flow short circuit caused by the supplement of the fresh air flow can be avoided conveniently.

Further, be provided with the access door on the casing, the casing is supported by the frame, the frame adopts shaped steel welding to form. The structure of casing is stable reliable, and the setting of access door is convenient for overhaul and maintain this heating system.

Has the advantages that:

1. according to the belt dryer gas heating system, the large cylinder, the small cylinder and the combustion head of the natural gas burner are sequentially coaxially sleeved section by section, the small cylinder penetrates through the plurality of air inlet holes, part of circulating air enters the small cylinder from the air inlet holes to take away heat at the combustion head, and the internal components of the combustion head cannot be damaged due to overhigh temperature at the combustion head; the combustion flame is protected from being influenced by circulating wind, the phenomenon that the flame is blown off directly by overlarge circulating wind to cause abnormal ignition of a combustion head is avoided, meanwhile, natural gas is combusted more fully, and the phenomenon that the circulating wind blows askew flame to cause local overheating is avoided; meanwhile, part of circulating air uniformly flows through the air mixing gap, so that the heat of combustion flame is taken away, the small cylinder, the large cylinder and the shell are not overheated locally, and the heating efficiency is improved;

2. according to the belt dryer gas heating system, the fire blocking cone gradually inclines towards the air mixing nets on the two sides from the combustion chamber, when the flame is too long, the fire blocking cone can block the flame from directly entering the air outlet chamber, meanwhile, the flame is guided by the fire blocking cone and uniformly penetrates through the air mixing nets, so that the hot air is uniformly mixed and enters the air mixing chamber, the air temperature is more stable, and the drying effect is better;

3. according to the belt dryer gas heating system, circulating air after drying materials enters the heating system from the air inlet and is sequentially filtered by the filtering device and the air mixing net, when fine materials which are not filtered cleanly in the circulating air are burnt by flame, the fine materials can be further filtered by the flame retardant net, so that fire caused by the fact that sparks are brought into the circulating fan or the dryer is prevented, or burning ash enters the dryer to pollute the materials, and the whole system is safer and more feasible;

4. according to the belt dryer gas heating system, the filtering device is detachably arranged in the air inlet through the drawer type structure, the filtering device can be cleaned or replaced without stopping, and the belt dryer gas heating system is more convenient and efficient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic perspective view of a gas heating system of a belt dryer according to the present invention, wherein an access door is not shown;

FIG. 2 is a schematic view of another perspective view of the gas heating system of the belt dryer of the present invention, wherein the access door and the housing are not shown;

FIG. 3 is a schematic side view of the belt dryer gas heating system of the present invention, with the housing not shown;

FIG. 4 is a schematic top view of a filter assembly of the gas heating system of the belt dryer of the present invention;

FIG. 5 is a schematic top view of the gas heating system of the belt dryer of the present invention with the access door not shown;

FIG. 6 is a schematic view of the gas flow of the combustion cylinder assembly and the fire-blocking cone of the gas heating system of the belt dryer of the present invention;

the arrows in fig. 3, 5 and 6 indicate the direction of the airflow;

in the figure: 1. the device comprises a shell, 11, an air inlet chamber, 12, a combustion chamber, 13, a air mixing chamber, 14, an air outlet chamber, 15, an air inlet, 16, an air supplement port, 17, an air outlet, 18, an access door, 2, a natural gas burner, 21, a combustion head, 3, a combustion cylinder assembly, 31, a large cylinder, 32, a small cylinder, 321, an air inlet hole, 33, a first support, 34, a second support, 4, an air mixing assembly, 41, a fire blocking cone, 42, an air mixing net, 5, a circulating fan, 6, a moisture exhausting air valve, 61, an air inlet pipe, 7, a filtering device, 8, a flame retardant net, 9 and a frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 to 6, a belt dryer gas heating system includes a housing 1, a natural gas burner 2, a combustion cylinder assembly 3, an air mixing assembly 4 and a circulating fan 5, an air inlet chamber 11, a combustion chamber 12, an air mixing chamber 13 and an air outlet chamber 14 are sequentially arranged in the housing 1 along a horizontal direction, the combustion cylinder assembly 3 includes a large cylinder 31 and a small cylinder 32, the large cylinder 31, the small cylinder 32 and a combustion head 21 of the natural gas burner 2 are sequentially coaxially sleeved section by section, air mixing gaps are respectively arranged between the large cylinder 31, the small cylinder 32 and the housing 1, the large cylinder 31 is positioned in the combustion chamber 12, the small cylinder 32 and the combustion head 21 are both positioned in the air inlet chamber 11, and a plurality of air inlet holes 321 penetrate through the small cylinder 32; specifically, in this embodiment, the air inlet holes 321 are formed at one end of the small cylinder 32 close to the combustion head 21, the air inlet holes 321 are arranged opposite to the combustion head 21, and a plurality of the air inlet holes 321 are uniformly distributed around the circumference of the small cylinder 32; specifically, in the present embodiment, the large cylinder 31 is fixedly connected to the housing 1 through a first bracket 33, and the small cylinder 32 is fixedly connected to the large cylinder 31 through a second bracket 34;

the air mixing component 4 is arranged between the combustion chamber 12 and the air mixing chamber 13, the air mixing component 4 comprises a fire blocking cone 41 and air mixing nets 42 positioned at two sides of the fire blocking cone 41, the fire blocking cone 41 is gradually inclined towards the air mixing nets 42 at two sides from the combustion chamber 12, and the fire blocking cone 41 is arranged opposite to the outlet of the large cylinder 31;

the air inlet chamber 11 is provided with an air inlet 15, a moisture exhaust air valve 6 and an air supplement port 16, the air inlet 15 is arranged below the shell 1, the moisture exhaust air valve 6 and the air supplement port 16 are both arranged above the shell 1, an air inlet pipe 61 of the moisture exhaust air valve 6 is arranged below the small cylinder 32, a filtering device 7 is arranged in the air inlet 15, and the filtering device 7 is detachably arranged in the air inlet 15 through a drawer type structure; the air inlet chamber 11, the combustion chamber 12, the air mixing net 42, the air mixing chamber 13 and the air outlet chamber 14 are sequentially communicated, an air outlet 17 is arranged on the air outlet chamber 14, and the circulating fan 5 is used for discharging the mixed hot air in the air outlet chamber 14 from the air outlet 17.

In order to further prevent sparks or ash from entering the air outlet chamber 14, in the present embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 5, a flame retardant mesh 8 is disposed between the air mixing chamber 13 and the air outlet chamber 14, the air mixing chamber 13 and the air outlet chamber 14 are communicated through the flame retardant mesh 8, and after the circulating air is sequentially filtered by the filtering device 7 and the air mixing mesh 42, if fine materials which are not filtered are burnt by flames, the fine materials can be further filtered when passing through the flame retardant mesh 8.

Specifically, in this embodiment, the filtering device 7 is a high temperature resistant stainless steel mesh grid, the fire cone 41 is made of a high temperature resistant stainless steel material, the air mixing mesh 42 is a high temperature resistant metal mesh grid, the air mixing mesh 42 of this embodiment is a high temperature resistant stainless steel mesh grid, and the air mixing mesh 42 mainly functions to allow hot air to pass through uniformly to obtain a better air mixing effect; the casing 1 is supported by the frame 9, the frame 9 adopts shaped steel welding to form, be provided with access door 18 on the casing 1.

When the heat supply system is connected to a dryer for use, the circulating fan 5 discharges the mixed hot air in the air outlet chamber 14 into a material layer of the dryer from the air outlet 17, and the drying tail gas (circulating air) of the dryer is discharged into the heat supply system through the air inlet 15, so that the drying heat is recycled.

The working principle is as follows:

firstly, circulating air exhausted from a dryer is filtered by a filtering device 7 and then introduced into an air inlet chamber 11, part of the circulating air is exhausted from a heat supply system through a moisture exhaust air valve 6, and meanwhile, fresh air flow is supplemented through an air supplementing opening 16; meanwhile, part of circulating air enters the small cylinder 32 through the air inlet hole 321 to take away heat at the combustion head 21, so that the internal combustion head assembly 21 is not damaged due to overhigh temperature at the combustion head 21; meanwhile, part of circulating air uniformly flows through the air mixing gap, so that the heat of the combustion flame is taken away, the local overheating of the small cylinder 32 and the large cylinder 31 is avoided, and the combustion flame is protected from being influenced by the circulating air; the small cylinder 32 and the large cylinder 31 cover the combustion flame, the fire blocking cone 41 is arranged opposite to the outlet of the large cylinder 31, the fire blocking cone 41 is gradually inclined towards the air mixing net 42 at two sides from the combustion chamber 12, and when the flame is too long, the fire blocking cone 41 can block the flame from directly entering the air outlet chamber 14; after being heated in the air inlet chamber 11 and the combustion chamber 12, the circulating air is guided by the fire blocking cone 41 and uniformly passes through the air mixing net 42, so that the hot air is uniformly mixed and enters the air mixing chamber 13; when the fine materials which are not filtered and cleaned in the circulating air are burnt by flame, the fine materials can be filtered when passing through the flame-retardant net 8, so that sparks are prevented from being brought into the circulating fan 5 or the dryer to cause fire, or burnt ash enters the dryer to pollute the materials; the circulating fan 5 discharges the mixed hot air in the air outlet chamber 14 into a material layer of the dryer from the air outlet 17, tail gas passing through the material layer enters the air inlet chamber 11 again, most of the tail gas is mixed with fresh air supplied from the air supply port 16 to realize the recycling of drying heat, and a part of the tail gas is discharged through the moisture exhaust air valve 6, so that the purpose of saving energy of the heating system is realized.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one device or feature to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.