CN221630307U - Straw seedling raising tray drying furnace with built-in air duct - Google Patents

Abstract

The utility model discloses a straw seedling tray drying furnace with a built-in air duct, comprising a combustion chamber, a drying chamber, a burner, a blower, an exhaust fan and a seedling tray conveyor belt, a lower perforated plate is provided at the bottom of the drying chamber, an upper perforated plate is provided at the top and a built-in lower air duct and a built-in upper air duct are formed, the burner is arranged at the top of the combustion chamber, the blower is used to send hot air into the drying chamber, and the exhaust fan is used to recycle the hot air in the drying chamber for reuse. The utility model cooperates with the blower and the built-in lower air duct to orderly send the hot air to every corner of the drying chamber, the exhaust fan cooperates with the built-in upper air duct to recycle the hot air in the drying chamber after one drying, and sends it into the drying chamber again through two return air ducts for a secondary drying cycle, so as to fully dry the straw seedling tray in the drying chamber, and the exhaust fan is arranged at one end close to the combustion chamber to shorten the travel of the recovery pipeline and reduce the loss of heat energy.

Description

Straw seedling raising tray drying furnace with built-in air duct

Technical Field

The utility model relates to the technical field of seedling raising tray production, in particular to a straw seedling raising tray drying furnace with a built-in air duct.

Background

The straw seedling raising tray is prepared from plant straw (including corn straw, wheat straw, rice straw, mushroom residue and the like) by crushing, fermenting, mixing with trace elements, organic carriers and other processes, and preparing into the biomass rice seedling raising tray by special equipment.

In the process of producing the straw seedling raising tray, a drying process is involved, drying equipment is used, and the principle is as follows: the hot air of combustion chamber is sent into the drying furnace through the forced draught blower, is discharged by the air exhauster that sets up in drying furnace rear end top to carry out the convulsions, forms the stoving wind channel of going into upper outlet down, perhaps is that the air exhauster will take the wind rethread of waste heat of taking out is sent into the drying furnace from drying furnace front end top to preceding pipeline from the back, recycles the waste heat, has following not enoughly:

1. The exhaust fan directly discharges the wind with the waste heat, so that the heat energy utilization rate is low, and the energy waste is caused;

2. The form in sending the wind of taking the waste heat into the drying furnace again has realized the recycling of waste heat, but current structural style is mostly with the air exhauster setting in the drying furnace rear end for recovery pipeline overlength, the pipeline is not done the thermal insulation and is handled, then heat energy loss can be more, the pipeline is done the thermal insulation and is handled and can additionally increase the cost again, moreover, if set up the air exhauster and shorten recovery pipeline in the drying furnace front end, can appear hot-blast unable circulation to the drying furnace rear end again, can't form complete inner loop, can not carry out even stoving to all materials, the stoving uniformity is poor, the stoving effect can't be guaranteed.

Disclosure of utility model

The utility model mainly aims to provide a straw seedling raising tray drying furnace with a built-in air duct, which aims to solve the defects of low heat energy utilization rate and waste heat recovery structural form of the existing drying furnace.

In order to solve the technical problems, the utility model provides a straw seedling raising tray drying furnace with a built-in air duct, which comprises the following components:

the top of the combustion chamber is provided with two exhaust ports;

The drying chamber is arranged at one side of the combustion chamber, a partition wall is arranged between the combustion chamber and the drying chamber, a return air hole for communicating the combustion chamber and the drying chamber is formed in the top of the partition wall, a lower orifice plate is arranged at the bottom of the drying chamber, an upper orifice plate is arranged at the top of the drying chamber, a plurality of air holes are respectively formed in the lower orifice plate and the upper orifice plate from front to back, a built-in lower air channel is formed in the bottom plate of the lower orifice plate and the bottom plate of the drying chamber, a built-in upper air channel is formed in the top plate of the upper orifice plate and the top plate of the drying chamber, return air channels with the bottom end communicated with the built-in lower air channel and the top end vertically extending upwards are respectively formed in the two side walls of the drying chamber, an air inlet pipe communicated with the drying chamber is arranged at the bottom of the combustion chamber, an air inlet of the air inlet pipe is arranged in the combustion chamber, an air outlet is arranged in the drying chamber, and the built-in lower air channel extends into the air inlet pipe;

the burner is arranged at the top of the combustion chamber and used for heating air;

The air feeder is arranged at the air inlet end of the air inlet pipe and used for feeding hot air in the combustion chamber into the drying chamber through the air inlet pipe;

The exhaust fan is arranged at the top of the drying chamber and is close to one end of the combustion chamber, the air inlet end of the exhaust fan is communicated with the built-in upper air duct, and the air outlet end of the exhaust fan is respectively communicated with the top ends of the two return air ducts; and

The seedling raising tray conveyor belt is arranged in the drying chamber and used for transferring the external seedling raising tray to be dried into the drying chamber for drying.

Further, the apertures of the air holes on the lower orifice plate and the upper orifice plate are changed from small to large from front to back.

Further, the lower orifice plate and the upper orifice plate are both made of 304 stainless steel.

Further, the burner is a hot blast stove burner, and the heating temperature is less than 180 ℃.

Further, the blower is an axial flow fan device, including:

An impeller;

the rotating shaft is fixedly connected with the center of the impeller, is connected with a front wall bearing of the combustion chamber and extends outwards through the combustion chamber;

the output end of the reduction gearbox is in transmission connection with the outer end of the rotating shaft;

And the motor is in transmission connection with the power input end of the reduction gearbox.

Further, the exhaust fan is a centrifugal fan.

Further, the air outlet of air exhauster is linked together with two way return air wind channel tops respectively through hot air recovery pipeline, hot air recovery pipeline includes:

A horizontally arranged T-shaped pipeline;

And the air outlet of the exhaust fan is connected with the third end of the T-shaped pipeline.

Compared with the prior art, the utility model has the advantages that:

The upper pore plate and the lower pore plate are provided with the built-in lower air channel and the built-in upper air channel, the air blower is matched with the built-in lower air channel, hot air is orderly sent to each corner of the drying chamber, the exhaust fan is matched with the built-in upper air channel to recycle the hot air after primary drying in the drying chamber, the hot air is sent into the drying chamber again through the two return air channels to carry out secondary drying circulation, complete internal circulation is formed, the heat energy utilization rate is improved, the travel of a recycling pipeline is shortened by arranging the exhaust fan at one end close to the combustion chamber, and heat energy loss is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

Figure 1 is a front view of the present utility model,

Figure 2 is a cross-sectional view of A-A of figure 1,

Figure 3 is a bottom view of the present utility model,

Figure 4 is a schematic view of the structure of the lower orifice plate 21 and the upper orifice plate 22,

The reference numerals are as follows:

The air conditioner comprises a combustion chamber 1, an air supplementing port 11, an air inlet pipe 12, a drying chamber 2, a lower orifice plate 21, an upper orifice plate 22, a built-in lower air duct 23, a built-in upper air duct 24, an air return air duct 25, a combustion machine 3, a blower 4, an impeller 41, a rotating shaft 42, a reduction gearbox 43, a motor 44, an exhaust fan 5, a seedling raising tray conveyor belt 6, a hot air recovery pipeline 7, a T-shaped pipeline 71, a vertical pipeline 72, a partition wall 10 and an air hole 100.

Detailed Description

In order that those skilled in the art may better understand the technical solutions of the present utility model, the following detailed description of the present utility model with reference to the accompanying drawings is provided for exemplary and explanatory purposes only and should not be construed as limiting the scope of the present utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

It should be noted that, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an azimuth or a positional relationship based on that shown in the drawings, or that the inventive product is commonly put in place when used, merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 4, the utility model provides a straw seedling raising tray drying furnace with a built-in air duct, which comprises a combustion chamber 1, a drying chamber 2, a combustion machine 3, a blower 4, an exhaust fan 5 and a seedling raising tray conveyor belt 6, wherein:

the top of the combustion chamber 1 is provided with two air supplementing ports 11 for supplementing air and exhausting air of the combustion chamber 1;

The drying chamber 2 is arranged at one side of the combustion chamber 1, a partition wall 10 is arranged between the combustion chamber 1 and the drying chamber 2, a return air hole for communicating the combustion chamber 1 and the drying chamber 2 is formed in the top of the partition wall 10, a 304 stainless steel plate is adopted as the partition wall 10, a lower orifice plate 21 is arranged at the bottom of the drying chamber 2, an upper orifice plate 22 is arranged at the top of the drying chamber 2, the lower orifice plate 21 and the upper orifice plate 22 are 304 stainless steel plates, a plurality of air holes 100 are respectively formed from front to back, and the diameters of the air holes 100 are changed from front to back to be larger, as shown in fig. 4;

The bottom plate 21 and the bottom plate of the drying chamber 2 are provided with a built-in lower air duct 23, the top plate 22 and the top plate of the drying chamber 2 are provided with a built-in upper air duct 24, as shown in fig. 2 and 3, two side walls of the drying chamber 2 close to the partition wall 10 are respectively provided with a return air duct 25 with the bottom communicated with the built-in lower air duct 23 and the top extending vertically upwards, the bottom of the combustion chamber 1 is provided with an air inlet pipe 12 communicated with the drying chamber 2, an air inlet of the air inlet pipe 12 is positioned in the combustion chamber 1, an air outlet is positioned in the drying chamber 2, and the built-in lower air duct 23 extends into the air inlet pipe 12;

The burner 3 is arranged at the top of the combustion chamber 1 and is used for heating air, the burner 3 is a hot blast stove burner, commercial products are adopted, and the straw seedling raising tray needs low-temperature drying, so that the type with the heating temperature being less than 180 ℃ is selected;

The blower 4 is arranged at the air inlet end of the air inlet pipe 12 and is used for conveying hot air in the combustion chamber 1 into the drying chamber 2 through the air inlet pipe 12, the blower 4 adopts an axial flow blower device, the temperature in the combustion chamber 1 is relatively high, and considering that adverse effects can be brought to the blower 4 if the blower 4 is integrally arranged in the combustion chamber 1, the utility model preferably adopts a power driving mechanism arranged outside the combustion chamber 1, an executing mechanism for blowing in is arranged in the combustion chamber 1, specifically, the blower 4 comprises an impeller 41, a rotating shaft 42, a reduction gearbox 43 and a motor 44, as shown in fig. 1 and 3, the impeller 41 is rotatably arranged at the center of the air inlet pipe 12, the rotating shaft 42 is fixedly connected with the center of the impeller 41, the rotating shaft 42 is connected with a front wall bearing of the combustion chamber 1 and extends outwards through the combustion chamber 1, the reduction gearbox 43 is arranged outside the combustion chamber 1, the output end of the motor 44 is in transmission connection with the power input end of the reduction gearbox 43, the impeller 41, the rotating shaft 42 and the motor 44 are all commercial products, and belong to the mature prior art, the impeller 41 is driven by the motor 44 to rotate through the motor 44 to drive the rotating shaft 42 to the drying chamber 2;

The air exhauster 5 is arranged at the top of the drying chamber 2 and is positioned at one end close to the combustion chamber 1, the air inlet end of the air exhauster 5 is communicated with the built-in upper air duct 24, the air outlet end of the air exhauster is respectively communicated with the top ends of the two paths of return air ducts 25, the air exhauster 5 recovers the primary hot air circulated in the drying chamber 2 through the built-in upper air duct 2 and sends the primary hot air into the drying chamber 2 again through the two paths of return air ducts 25, the waste heat of the primary hot air circulation is recycled, the heat energy utilization rate is improved, the air exhauster 5 adopts a centrifugal fan, and is a commercially available product, the model specification of the air exhauster is not limited, and the air outlet of the air exhauster 5 is respectively communicated with the top ends of the two paths of return air ducts 25 through the hot air recovery pipeline 7, as shown in fig. 2:

the hot air recovery pipeline 7 comprises a T-shaped pipeline 71 which is horizontally arranged and two vertical pipelines 72 which respectively communicate the top ends of the two return air channels 25 with the symmetrical two ends of the T-shaped pipeline 71, the air outlet of the exhaust fan 5 is connected with the third end of the T-shaped pipeline 71, in order to reduce heat dissipation, the whole hot air recovery pipeline 7 is subjected to heat preservation treatment, a specific heat preservation means is not limited, heat preservation can be realized by wrapping heat preservation cotton, and the position of the exhaust fan 5 is close to the return air channels 25 as much as possible so as to shorten the travel of the hot air recovery pipeline 7, thereby reducing heat dissipation in the recovery process;

the seedling raising tray conveyor belt 6 is arranged in the drying chamber 2 and is used for transferring the straw seedling raising tray to be dried outside to the inside of the drying chamber 2 for drying, and the seedling raising tray conveyor belt 6 is a commercially available product, and the specific structure is not limited.

When the drying machine needs to be described, the purpose of arranging the air holes 100 from front to back on the lower orifice plate 21 and the upper orifice plate 22 from front to back is to enable hot air to orderly enter the drying chamber 2 for drying circulation, specifically, hot air entering the built-in lower air duct 23 cannot be fully fed into the drying chamber 2 from the air holes 100 with smaller front hole diameters to form positive pressure, excessive hot air can orderly spread to the rear section of the built-in lower air duct 23, then the hot air enters the tail of the drying chamber 2 from the air holes 10 with larger rear section hole diameters, so that the hot air can circulate to each corner of the drying chamber 2, and when the hot air passing through the drying cycle for the first time is pumped out by the exhaust fan 5, as the aperture of the air holes 100 at the front section of the built-in upper air duct 24 is smaller, the flow requirement of the exhaust fan 5 cannot be met, negative pressure is formed, insufficient part of the hot air entering the tail of the drying chamber 2 is fed into the built-in upper air duct 24 under the negative pressure of the built-in upper air duct 24, and the hot air at the tail of the drying chamber 2 is continuously fed into the built-in upper air duct 24 from the rear section hole 100, and then the exhaust fan 5 is recycled for the second time.

Along with the seedling raising tray conveying belt 6 constantly sends straw seedling raising tray into the drying chamber 2 for drying, humidity in the drying chamber 2 can be bigger and bigger, and drying effect can be influenced, therefore, the top at the drying chamber 2 still should be equipped with the wet pipeline of arranging, the end of wet pipeline of arranging is provided with the wet fan of arranging, when the humidity in the drying chamber 2 accumulated to the threshold value, opens wet valve and wet fan of arranging, and the moist air in the drying chamber 2 is discharged, and the means of monitoring humidity also belongs to ripe prior art, can set up the electron hygrometer in the drying chamber 2 and realize, set up the threshold value according to the stoving demand.

In addition, some of the hot air in the drying chamber 2 after one drying cycle is directly circulated back to the combustion chamber 1 through the return air holes in the partition wall 10 for secondary heating, because the arrangement of the exhaust fan 5 realizes the internal circulation of the hot air, after the internal circulation reaches balance, fresh air is not needed to be supplemented in the drying furnace, the fresh air cannot enter the air supplementing port 11 before the drying chamber is not dehumidified, the blower 4 supplies air into the drying chamber 2, and negative pressure formed by the combustion chamber 1 is supplemented by air in the drying chamber 2.

Working principle:

When the utility model is used, the air in the combustion chamber 1 is heated by the burner 3, hot air is sent into the drying chamber 2 by the blower 4 through the air inlet pipe 12, part of the hot air is diffused to the tail part of the drying chamber 2 by the built-in lower air duct 23, so as to realize the drying of the straw seedling raising tray input by the seedling raising tray conveying belt 6, part of the hot air after once circulating in the drying chamber 2 is recovered by the exhaust fan 5 through the built-in upper air duct 24, then enters the drying chamber 2 in sequence through the two return air ducts 25 and the built-in lower air duct 23 for secondary drying circulation, the other part of the hot air is returned into the combustion chamber 1 for secondary heating under the negative pressure of the combustion chamber 1, then the part of the hot air is sent into the drying chamber 2 by the blower 4, and the circulation is performed in this way, when the humidity in the drying chamber 2 reaches a threshold value, the humidity is discharged, and fresh air is supplemented into the combustion chamber 1 by the two air supplementing ports 11 during the humidity.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (7)

1. Straw sprout cultivation dish drying furnace with built-in wind channel, its characterized in that includes:

the combustion device comprises a combustion chamber (1), wherein two exhaust ports (11) are formed in the top of the combustion chamber (1);

The drying chamber (2) is arranged at one side of the combustion chamber (1), a partition wall (10) is arranged between the combustion chamber (1) and the drying chamber (2), an air return hole which enables the combustion chamber (1) and the drying chamber (2) to communicate is formed in the top of the partition wall (10), a lower orifice plate (21) is arranged at the bottom of the drying chamber (2), an upper orifice plate (22) is arranged at the top of the drying chamber, a plurality of air holes (100) are respectively formed in the lower orifice plate (21) and the upper orifice plate (22) from front to back, a built-in lower air channel (23) is formed between the lower orifice plate (21) and the bottom plate of the drying chamber (2), a built-in upper air channel (24) is formed between the upper orifice plate (22) and the top plate of the drying chamber (2), an air return channel (25) with the bottom communicated with the built-in lower air channel (23) and the top extending vertically upwards is respectively arranged on the two side walls of the drying chamber (2) close to the partition wall (10), an air inlet pipe (12) communicated with the drying chamber (2) is arranged at the bottom of the combustion chamber (1), an air inlet pipe (12) is arranged in the combustion chamber (1), an air outlet (2) and an air inlet port is located in the air inlet pipe (12) and extends into the air inlet channel (12);

The burner (3) is arranged at the top of the combustion chamber (1) and used for heating air;

The air feeder (4) is arranged at the air inlet end of the air inlet pipe (12) and used for feeding hot air in the combustion chamber (1) into the drying chamber (2) through the air inlet pipe (12);

The exhaust fan (5) is arranged at the top of the drying chamber (2) and is close to one end of the combustion chamber (1), the air inlet end of the exhaust fan (5) is communicated with the built-in upper air duct (24), and the air outlet end of the exhaust fan is respectively communicated with the top ends of the two return air ducts (25); and

And the seedling raising tray conveyor belt (6) is arranged in the drying chamber (2) and used for transferring the external seedling raising tray to be dried into the drying chamber (2) for drying.

2. The straw seedling raising tray drying furnace with the built-in air duct according to claim 1, wherein the apertures of a plurality of air holes (100) on the lower orifice plate (21) and the upper orifice plate (22) are changed from small to large from front to back.

3. The straw seedling raising tray drying furnace with the built-in air duct according to claim 2, wherein the lower orifice plate (21) and the upper orifice plate (22) are made of 304 stainless steel.

4. The straw seedling raising tray drying furnace with the built-in air duct according to claim 1, wherein the burner (3) is a hot blast stove burner, and the heating temperature is less than 180 ℃.

5. The straw seedling raising tray drying furnace with the built-in air duct according to claim 1, wherein the air feeder (4) is an axial flow fan device, comprising:

An impeller (41);

A rotating shaft (42) fixedly connected with the center of the impeller (41), wherein the rotating shaft (42) is connected with a front wall bearing of the combustion chamber (1) and extends outwards through the combustion chamber (1);

the output end of the reduction gearbox (43) is in transmission connection with the outer end of the rotating shaft (42);

and a motor (44) in transmission connection with the power input end of the reduction gearbox (43).

6. The straw seedling raising tray drying furnace with the built-in air duct according to claim 1, wherein the exhaust fan (5) is a centrifugal fan.

7. The straw seedling raising tray drying furnace with the built-in air duct as set forth in claim 1, wherein: the air outlet of air exhauster (5) is linked together with two way return air wind channel (25) top respectively through hot air recovery pipeline (7), hot air recovery pipeline (7) include:

A horizontally arranged T-shaped pipe (71);

Two paths of vertical pipelines (72) which are respectively communicated with the two symmetrical ends of the T-shaped pipeline (71) at the top ends of the two paths of return air channels (25), and the air outlet of the exhaust fan (5) is connected with the third end of the T-shaped pipeline (71).