阅读说明：本技术 Epp产品烘干用高效烘房 (Efficient drying room for drying EPP (expanded polypropylene) products ) 是由 杨金录 钱江 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种EPP产品烘干用高效烘房,包括建于地面上的房体及由蒸汽供给源向房体输送蒸汽的蒸汽供给管道,其特征在于房体内地面挖有凹腔,凹腔上盖有开设网孔的盖板；还包括气流循环散热机构,其包括房体外的风机和散热风箱、设于凹腔内开有送风口的底置风管、位于底置风管下方的S形螺纹散热管和设于房体内顶部的开有回风口的顶置风管。散热风箱上具有与风机的出风口连的风箱进风口和经管道与底置风管连的风箱出风口。风机的进风口经管道与顶置风管连接。散热风箱内设S形散热铜管,其一端与蒸汽供给管道相连,另一端经管道与S形螺纹散热管相连。该烘房对EPP产品的烘干均匀性更好,烘干效率更高,且节约蒸汽用量,减小生产成本。(The invention discloses an efficient drying room for drying EPP (expanded polypropylene) products, which comprises a room body built on the ground and a steam supply pipeline for conveying steam to the room body from a steam supply source, and is characterized in that a concave cavity is dug in the room body, and a cover plate provided with meshes is covered on the concave cavity; the air circulation heat dissipation device comprises a fan and a heat dissipation air box outside the house body, a bottom air pipe arranged in the cavity and provided with an air supply outlet, an S-shaped threaded heat dissipation pipe arranged below the bottom air pipe, and an overhead air pipe arranged at the top in the house body and provided with an air return inlet. The heat dissipation air box is provided with an air box air inlet connected with an air outlet of the fan and an air box air outlet connected with the bottom air pipe through a pipeline. The air inlet of the fan is connected with the overhead air pipe through a pipeline. An S-shaped heat dissipation copper pipe is arranged in the heat dissipation air box, one end of the S-shaped heat dissipation copper pipe is connected with the steam supply pipeline, and the other end of the S-shaped heat dissipation copper pipe is connected with the S-shaped threaded heat dissipation pipe through a pipeline. The drying room has better drying uniformity of EPP products, higher drying efficiency, less steam consumption and reduced production cost.)

1. An efficient drying room for drying EPP products comprises a room body (1) built on the ground and a steam supply pipeline (2) for conveying steam from a steam supply source to the room body (1), and is characterized in that a concave cavity (3) is dug in the room body (1), a cover plate (4) provided with meshes is covered on the concave cavity (3), and the cover plate (4) is supported by a support (5) arranged on the bottom surface of the concave cavity (3);

the heat dissipation device is characterized by further comprising an airflow circulating heat dissipation mechanism, the mechanism comprises a fan (6) and a heat dissipation air box (7) which are arranged outside the room body (1), the fan (6) is provided with a fan air inlet (6 a) and a fan air outlet (6 b), the heat dissipation air box (7) is provided with an air box air inlet (7 a), an air box air outlet (7 b), a steam inlet (7 c) and a steam outlet (7 d), an S-shaped heat dissipation copper pipe (8) is arranged in an inner cavity of the heat dissipation air box (7), one end of the S-shaped heat dissipation copper pipe (8) is connected with the steam supply pipeline (2) through the steam inlet (7 c), the other end of the S-shaped heat dissipation copper pipe (8) is connected with the steam outlet (7 d), and the fan air outlet (6;

the air box is characterized by further comprising a bottom air pipe (9) arranged in the cavity (3) and a top air pipe (10) arranged at the top in the room body (1), wherein an air outlet (7 b) of the air box is communicated with a bottom air pipe inlet (9 a) of the bottom air pipe (9) through an air supply pipe (11), a plurality of air supply openings (9 b) are formed in the bottom air pipe (9), the top air pipe (10) is connected with a fan air inlet (6 a) through an air return pipe (12), and a plurality of air return openings (10 a) are formed in the top air pipe (10);

The steam-cooling air box is characterized by further comprising an S-shaped threaded heat-radiating pipe (13) which is arranged in the cavity (3) and is horizontally arranged above the bottom air-supply pipe (9), and a steam outlet (7 d) on the heat-radiating air box (7) is connected with an inlet at the front end of the S-shaped threaded heat-radiating pipe (13) through a steam conveying pipeline (14).

2. The EPP product drying efficient drying room according to claim 1, further comprising a PLC, a temperature sensor (15) arranged in the room body (1) and a steam supply electromagnetic valve (16) arranged on the steam supply pipeline (2), wherein the fan (6) is a variable frequency fan, and the temperature sensor (15), the steam supply electromagnetic valve (16) and the variable frequency fan are electrically connected with the PLC.

3. The efficient drying room for drying EPP products, as claimed in claim 2, wherein the end of said S-shaped threaded heat dissipating pipe (13) is connected with a drain pipe (17), said drain pipe (17) is connected with an underground drain pipe network, and a drain solenoid valve (18) is arranged on said drain pipe (17), said drain solenoid valve (18) is also electrically connected with the PLC controller.

4. The efficient drying room for drying EPP products according to claim 1, wherein a plurality of heat dissipating fins (19) are arranged on the inner wall of the heat dissipating air box (7) around the S-shaped heat dissipating copper pipe (8).

5. The efficient drying room for drying EPP products, as claimed in claim 1, wherein a plurality of parallel auxiliary supporting cross bars (20) are fixed on the support (5) for supporting the S-shaped threaded heat dissipation pipes (13), and the S-shaped threaded heat dissipation pipes (13) are fastened and fixed on the auxiliary supporting cross bars (20) by means of hoops.

6. The efficient drying room for drying EPP products according to claim 1, wherein said air supply outlets (9 b) are provided on the left and right sides of the bottom air duct (9).

7. The EPP product drying efficient drying room as claimed in claim 6, wherein said top air duct (10) is disposed opposite to the lower bottom air duct (9), and said air return opening (10 a) is disposed at the bottom of the top air duct (10).

8. The EPP product drying efficient drying room as claimed in claim 1, wherein the fan (6) and the heat dissipation air box (7) are both arranged at the top of the room body (1), the air box air inlet (7 a) and the air box air outlet (7 b) on the heat dissipation air box (7) are transversely and oppositely distributed, and the steam inlet (7 c) and the steam outlet (7 d) are longitudinally arranged and are arranged in a vertically staggered manner.

9. The efficient drying room for drying EPP products as claimed in claim 1, wherein the pipe diameter of said S-shaped radiating copper pipe (8) is smaller than that of said S-shaped threaded radiating pipe (13).

Technical Field

The invention relates to an efficient drying room for drying EPP products.

Background

In the known technology, after EPP is granulated by an extrusion method and manufactured into a product through a forming machine and a die, the product is often dried in a concentrated manner at the end due to moisture on the product, and the drying process is also a process for further curing the EPP, so that the internal stress of the EPP can be eliminated, and the product structure is more stable. The current practice is to discharge the product onto a cart rack and place it in a drying room for drying.

The traditional drying room is characterized in that air openings are formed in the periphery of a room body, and EPP products are dried in a natural air flowing mode, but the traditional drying room has the defects that the efficiency is too low, the temperature is not well controlled, and the delivery time is influenced.

Therefore, the design of steam drying is introduced in the prior art, namely, steam radiating pipelines are arranged around the drying room, and the steam is supplied by a self-arranged boiler or a pipeline of a thermal power plant. Inside releasing the baking house through the heat that the radiator contains steam to install the fan additional and introduce external air current and strengthen the heat distribution, dry the EPP product, compare original natural wind stoving mode and did improve efficiency, still there is following shortcoming when actually implementing:

(1) the hot air in the drying room is unevenly distributed, so that EPP products in the drying room are unevenly heated, and the drying time is not uniform. The EPP products at the periphery are often dried, but the products in the middle area are still wet, so that the shipment uniformity of the same batch of products is greatly influenced; repeated drying operations are often required.

(2) The external air current that the fan introduced often mingles with moisture, when disturbance steam, the stoving efficiency of the steam that weakens on the contrary has reduced the drying efficiency of product to influence the curing effect of product.

(3) Because drying efficiency is low, the temperature rises slowly, and efficiency is poor, current baking house often need prolong the stoving time, increases the steam quantity, leads to the manufacturing cost increase of enterprise.

Disclosure of Invention

The invention aims to: the efficient drying room for drying the EPP products is provided, the drying uniformity of the EPP products is better, the drying efficiency is higher, and the curing quality of the products is favorably improved; meanwhile, the steam consumption can be saved, and the production cost of enterprises is reduced.

The technical scheme of the invention is as follows: an efficient drying room for drying EPP products comprises a room body built on the ground and a steam supply pipeline for conveying steam to the room body from a steam supply source, and is characterized in that a concave cavity is dug in the ground in the room body, a cover plate provided with meshes is covered on the concave cavity, and the cover plate is supported by a support arranged on the bottom surface of the concave cavity;

the heat dissipation device comprises a room body, and is characterized by also comprising an airflow circulating heat dissipation mechanism, wherein the mechanism comprises a fan and a heat dissipation air box which are arranged outside the room body, the fan is provided with a fan air inlet and a fan air outlet, the heat dissipation air box is provided with an air box air inlet, an air box air outlet, a steam inlet and a steam outlet, an S-shaped heat dissipation copper pipe is arranged in an inner cavity of the heat dissipation air box, one end of the S-shaped heat dissipation copper pipe is connected with a steam supply pipeline through the steam inlet, the other end of the S-shaped heat;

The air box is characterized by also comprising a bottom air pipe arranged in the cavity and an overhead air pipe arranged at the top in the room body, wherein an air outlet of the air box is communicated with an inlet of the bottom air pipe through an air supply pipe, a plurality of air supply ports are formed in the bottom air pipe, the overhead air pipe is connected with an air inlet of the fan through a return air pipe, and a plurality of return air ports are formed in the overhead air pipe;

the heat dissipation air box is characterized by further comprising an S-shaped threaded heat dissipation pipe which is arranged in the concave cavity and is horizontally arranged above the bottom air pipe, and a steam outlet in the heat dissipation air box is connected with an inlet at the front end of the S-shaped threaded heat dissipation pipe through a steam conveying pipeline.

Furthermore, the steam supply system also comprises a PLC controller, a temperature sensor arranged in the room body and a steam supply electromagnetic valve arranged on the steam supply pipeline, wherein the fan is a variable frequency fan, and the temperature sensor, the steam supply electromagnetic valve and the variable frequency fan are all electrically connected with the PLC controller. The PLC is internally preset with a temperature range for the drying room to work, and the temperature range has the lowest critical working temperature and the highest critical working temperature. The temperature sensor is used for detecting the temperature in the drying room in real time, and when the detected temperature is lower than the lowest critical working temperature, the PLC sends a signal to increase the rotating speed of the fan so as to increase the temperature in the drying room; and when the detected temperature is higher than the preset highest critical working temperature, the PLC sends a signal to reduce the rotating speed of the fan so as to reduce the temperature in the house.

Furthermore, the tail end of the S-shaped threaded radiating pipe is connected with a drain pipe, the drain pipe is connected with an underground drainage pipe network, and a drain electromagnetic valve is arranged on the drain pipe and is also electrically connected with the PLC. After the airflow circulating heat dissipation mechanism operates for a certain time, the PLC controls to open the water discharge electromagnetic valve, and water in the S-shaped threaded heat dissipation pipe is discharged to the underground drainage pipe network by utilizing the output airflow of the fan, so that the influence of accumulated water in the S-shaped threaded heat dissipation pipe on the heat dissipation working efficiency is prevented.

Furthermore, a plurality of radiating fins are arranged on the inner wall of the radiating air box around the S-shaped radiating copper pipe. The introduction of the heat dissipating fins can enhance the dissipation of heat inside the heat dissipating bellows.

Furthermore, a plurality of parallel auxiliary supporting cross rods are fixed on the support and used for supporting the S-shaped threaded radiating pipe, and the S-shaped threaded radiating pipe is tightly bound and fixed on the auxiliary supporting cross rods through hoops.

Furthermore, the air supply outlets are arranged on the left side and the right side of the bottom air pipe.

Furthermore, the top-mounted air pipe and the bottom-mounted air pipe below the top-mounted air pipe are arranged oppositely, and the air return opening is formed in the bottom of the top-mounted air pipe.

Furthermore, the fan and the heat dissipation air box are both arranged at the top of the house body, the air inlet and the air outlet of the air box on the heat dissipation air box are transversely and oppositely distributed, and the steam inlet and the steam outlet are longitudinally arranged and are arranged in a vertically staggered manner.

Furthermore, the pipe diameter of the S-shaped radiating copper pipe is smaller than that of the S-shaped threaded radiating pipe.

The working principle of the invention is as follows:

the EPP products to be dried are placed on the cart and pushed into the house body by workers according to the needs, and are arranged on the cover plate with the meshes in a row in order.

Then sequentially opening a steam supply electromagnetic valve and a fan through a PLC (programmable logic controller) to enable the airflow circulating heat dissipation mechanism to operate; the steam supply source in the invention is derived from a factory-owned boiler or delivered by a thermal power plant as in the conventional technology. Steam is sent into the heat dissipation bellows through steam supply pipe, through the preliminary heat dissipation of S-shaped heat dissipation copper pipe, releases some heat, and this part heat is carried by the air current that the fan produced, forms hot-blast quilt and is sent into in the end puts the bellows.

Meanwhile, steam is continuously sent into the S-shaped threaded radiating pipe below the ground of the room body through the steam conveying pipeline, and heat is completely released through the S-shaped threaded radiating pipe. And the hot air fed into the bottom air pipe from the front is blown out by the air supply outlet to form upward air flow, so that the heat released by the S-shaped threaded radiating pipe is driven to move upwards, and the EPP product is dried.

The air current upwards gets into the overhead tuber pipe at the internal top in room through the return air inlet, returns the fan via the return air pipe at last, blows off from the fan air outlet again to this incessantly circulation forms the endless disturbance's of incessant circulation air current, spreads the heat equilibrium in the room to every corner, makes everywhere EPP product all fully heated, thereby lasts effectual stoving to the EPP product.

The temperature sensor also continuously operates in the drying process, and the temperature in the house body is detected in real time. The PLC is internally preset with a temperature range for the drying room to work, and the temperature range has the lowest critical working temperature and the highest critical working temperature. The temperature sensor is used for detecting the temperature in the house in real time, and when the detected temperature is lower than the lowest critical working temperature, the PLC sends a signal to increase the rotating speed of the fan so as to increase the temperature in the house; and when the detected temperature is higher than the preset highest critical working temperature, the PLC sends a signal to reduce the rotating speed of the fan so as to reduce the temperature in the house.

When the preset drying time is reached, the PLC sends a signal to sequentially close the fan and the steam supply electromagnetic valve, so that the air flow circulation heat dissipation mechanism stops running.

The invention has the advantages that:

1. the EPP product drying device is designed with the special air circulation heat dissipation mechanism, the air circulation heat dissipation mechanism has better drying uniformity and higher drying efficiency for the EPP product, the product curing quality is improved, the shipment uniformity of the same batch of products can be ensured to the maximum extent, and the repeated drying operation in the prior art is avoided.

2. The air flow circulation heat dissipation mechanism ensures that steam is fully utilized, the heat dissipation air box releases a part of heat of the steam through the arrangement of the S-shaped heat dissipation copper pipes, the part of heat participates in the circulation of fan air flow, the S-shaped threaded heat dissipation pipe below the cover plate fully releases the residual heat of the steam, the residual heat is conveyed by the fan air flow and dries an EPP product together with the heat in the fan air flow, the temperature rise in a room body is accelerated, the drying speed is high, the efficiency is high, the increase of the steam consumption is avoided, and therefore the production cost of enterprises is saved.

3. According to the invention, partial steam heat is released by virtue of the S-shaped heat dissipation copper pipe in the heat dissipation air box, and the partial steam heat participates in the circulation of the air flow of the fan, namely, continuous disturbed circulating hot air is formed, so that the interference of external air flow mixed with moisture introduced in the prior art on drying operation is avoided.

4. The air current circulation heat dissipation mechanism of the invention forms continuous and disturbed circulation air current when in operation, evenly distributes the heat in the room body to each corner, and fully heats EPP products at each position, thereby continuously and effectively drying the EPP products.

5. When the invention is implemented specifically, the S-shaped threaded radiating pipe and the bottom air pipe are placed by digging the concave cavity on the ground in the house body, compared with the original form of arranging steam radiating pipes around the inside of the house body, the invention can release the space in the house body and increase the drying volume. And the house body is not required to be enlarged or modified, so that the modification cost can be saved. Simultaneously, the S-shaped threaded radiating pipe is arranged underground, and is more convenient to install compared with the original mode of arranging the S-shaped threaded radiating pipe around.

6. According to the invention, the variable frequency fan, the temperature sensor and the PLC are cooperated with each other to control the working temperature of the drying room within a required range, so that the drying quality is better controlled, and the integral automation degree of the drying room is improved.

7. The tail end of the S-shaped threaded radiating pipe is connected with a drain pipe, the drain pipe is connected with an underground drainage pipe network, and a drain electromagnetic valve is arranged on the drain pipe and is also electrically connected with a PLC (programmable logic controller). After the airflow circulating heat dissipation mechanism operates for a certain time, the PLC controls to open the water discharge electromagnetic valve, and water in the S-shaped threaded heat dissipation pipe is discharged to the underground drainage pipe network by utilizing the output airflow of the fan, so that the influence of accumulated water in the S-shaped threaded heat dissipation pipe on the heat dissipation working efficiency is prevented.

Drawings

The invention is further described with reference to the following figures and examples:

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a top view of the S-shaped threaded pipe of the present invention;

FIG. 3 is a top view of the bottom mounted duct of the present invention;

fig. 4 is a bottom view of the overhead ductwork of the present invention.

Wherein: 1. a house body; 2. a steam supply pipe; 3. a concave cavity; 4. a cover plate; 5. a support; 6. a fan; 6a, a fan air inlet; 6b, a fan air outlet; 7. a heat dissipation air box; 7a, an air inlet of the air box; 7b, an air outlet of the air box; 7c, a steam inlet; 7d, a steam outlet; 8. s-shaped heat dissipation copper pipes; 9. a bottom air pipe is arranged; 9a, arranging an air pipe inlet at the bottom; 9b, an air supply outlet; 10. an air pipe is arranged at the top; 10a, an air return opening; 11. an air supply pipe; 12. a return air duct; 13. the S-shaped threaded radiating pipe; 14. a steam delivery conduit; 15. a temperature sensor; 16. a steam supply solenoid valve; 17. a drain pipe; 18. a water discharge electromagnetic valve; 19. a heat dissipating fin; 20. an auxiliary support rail; 21. pushing a cart; 22. EPP products.

Detailed Description