Multi-process cross-flow type bulk curing barn moisture removal airflow waste heat recoverer

Abstract

The utility model relates to a multi-process cross-flow type bulk curing barn moisture removal airflow waste heat recoverer, and belongs to the technical field of waste heat recovery devices. The heat exchanger comprises an upper box body, a lower box body and internal thread fin heat exchange tubes, the upper box body and the lower box body are vertically divided into a plurality of independent channels through partition plates, the multiple sets of heat exchange tubes are vertically arranged in a shell, and inlets and outlets of the independent channels are connected with inlets and outlets of the heat exchange tubes. Moisture removal airflow entering the box body enters the heat exchange tubes under flow guiding of the box body and the partition plates, and a U-shaped turn-back multi-flow-path flow channel is formed. Fresh air flows into the shell from an inlet in the right side of the shell in the horizontal direction and forms a cross-flow heat exchange mode with moisture removal airflow in the heat exchange pipes. The utility model aims to realize the recovery and high-efficiency utilization of the waste heat of the moisture removal airflow and obviously improve the waste heat recovery efficiency of the moisture removal airflow of the bulk curing barn through the multi-flow design, the cross-flow type heat exchange tube layout and the combination of the internal thread disturbance part and the external fin enhanced heat exchange of the heat exchange tube.

Description

Technical Field

[0001] This utility model relates to a multi-flow cross-flow dense drying oven dehumidification airflow waste heat recovery device, belonging to the technical field of waste heat recovery devices. Background Technology

[0002] In terms of waste heat recovery from exhaust air, current technologies mostly employ indirect heat exchangers to recover waste heat from the exhaust airflow. However, limited by the low thermal conductivity of humid air and the low convective heat transfer coefficient inside the heat exchange tubes, conventional waste heat recovery equipment for exhaust airflow not only has a large heat exchange area and high cost, but also generally low heat recovery efficiency. Employing enhanced heat exchange technology that utilizes multi-pass crossflow, increases airflow turbulence inside the tubes, and enlarges the heat exchange area outside the tubes can not only reduce the heat exchange area and cost of waste heat recovery equipment for exhaust airflow, but also improve the waste heat recovery rate of the exhaust airflow, thereby reducing the energy consumption of tobacco curing. Summary of the Invention

[0003] The technical problem to be solved by this utility model is: This utility model provides a multi-pass cross-flow intensive curing barn exhaust airflow waste heat recovery device with internal thread turbulence enhanced convective heat exchange. Through multi-pass heat exchange, cross-flow heat exchange, internal thread turbulence enhanced convective heat exchange and other enhanced heat exchange measures, the exhaust airflow is used to heat the fresh air entering the intensive curing barn, thereby enhancing the heat exchange between the exhaust airflow and the fresh air entering the intensive curing barn, thereby improving the utilization rate of the waste heat of the exhaust airflow and reducing the energy consumption of tobacco curing.

[0004] The present invention provides a multi-process cross-flow dense drying oven dehumidification airflow waste heat recovery device, comprising a housing 8; the upper part of the housing 8 is provided with an upper collection box 2 and the lower part with a lower collection box 3. The upper collection box 2 and the lower collection box 3 are vertically divided into multiple independent channels by a partition 10. The upper collection box 2 is connected to a dehumidification airflow inlet 4, and the lower collection box 3 is connected to a dehumidification airflow outlet 5. The positions of the dehumidification airflow outlet 5 and the dehumidification airflow inlet 4 are diagonally distributed.

[0005] The shell 8 has multiple sets of internally threaded finned tubes 1 arranged vertically inside. The internally threaded finned tubes 1 are placed in parallel to each other, and the inlet and outlet of the internally threaded finned tubes 1 are connected to the independent channels divided inside the upper header 2 and the lower header 3.

[0006] The metal pipe 102 of the internally threaded finned tube 1 is provided with an internally threaded flow-deflecting component 103 inside and a metal fin 101 outside.

[0007] The housing 8 has a fresh air inlet 6 on the right side and a fresh air outlet 7 on the left side.

[0008] Furthermore, the independent channel inlets and outlets of the upper header 2 and lower header 3 are connected to the inlet and outlet of the internally threaded finned tube 1, forming a "U-shaped foldback" flow channel.

[0009] Furthermore, the total heat exchange area of ​​the internally threaded finned tube 1 is 2 to 3 times that of a single-pass design, which is used to extend the heat exchange time through a multi-pass crossflow layout.

[0010] Furthermore, the partition 10 is completely connected to the upper header 2 and the lower header 3 in all directions, completely separating the upper header 2 and the lower header 3 into multiple parts.

[0011] Furthermore, the fresh air inlet 6 and the exhaust air outlet 5 are located on the same side, and the fresh air passes vertically through each row of internally threaded finned tubes 1, forming a crossflow heat exchange with the vertically flowing exhaust air.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model takes multi-pass crossflow heat exchange as its core and breaks through the efficiency bottleneck of traditional waste heat recovery through flow guiding design;

[0014] 2. This utility model not only effectively increases the heat exchange area between the exhaust airflow and the fresh air, but also optimizes the energy exchange path between the exhaust airflow and the fresh air, significantly improving the waste heat recovery efficiency.

[0015] 3. The multi-flow cross-flow dense drying room exhaust airflow waste heat recovery device involved in this utility model provides an efficient, reliable and environmentally friendly waste heat recovery solution for drying scenarios such as tobacco and grain. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the orthographic section of this utility model;

[0017] Appendix Figure 2 This is a structural diagram of the internally threaded finned tube of this utility model;

[0018] Appendix Figure 1 Appendix Figure 2 The numbers in the diagram represent the following in order: 1 - internally threaded finned tube, 2 - upper header, 3 - lower header, 4 - exhaust air inlet, 5 - exhaust air outlet, 6 - fresh air inlet, 7 - fresh air outlet, 8 - shell, 9 - condensate drain pipe, 10 - partition, 101 - metal fins, 102 - metal pipe, 103 - internally threaded turbulence-inducing component. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1: As Figures 1-2As shown, a multi-process crossflow dense drying oven dehumidification airflow waste heat recovery device includes a shell 8; the upper part of the shell 8 is provided with an upper header 2 and the lower part is provided with a lower header 3. The upper header 2 and the lower header 3 are vertically divided into multiple independent channels by a partition 10. The upper header 2 is connected to a dehumidification airflow inlet 4 and the lower header 3 is connected to a dehumidification airflow outlet 5. The positions of the dehumidification airflow outlet 5 and the dehumidification airflow inlet 4 are diagonally distributed.

[0021] The shell 8 has multiple sets of internally threaded finned tubes 1 arranged vertically inside. The internally threaded finned tubes 1 are placed in parallel to each other, and the inlet and outlet of the internally threaded finned tubes 1 are connected to the independent channels divided inside the upper header 2 and the lower header 3.

[0022] The metal pipe 102 of the internally threaded finned tube 1 is provided with an internally threaded flow-deflecting component 103 inside and metal fins 101 welded to the outside.

[0023] The housing 8 has a fresh air inlet 6 on the right side and a fresh air outlet 7 on the left side.

[0024] Furthermore, the independent channel inlets and outlets of the upper header 2 and lower header 3 are connected to the inlet and outlet of the internally threaded finned tube 1, forming a "U-shaped foldback" flow channel.

[0025] Furthermore, the total heat exchange area of ​​the internally threaded finned tube 1 is 2 to 3 times that of a single-pass design, which is used to extend the heat exchange time through a multi-pass crossflow layout.

[0026] Furthermore, the partition 10 is completely connected to the upper header 2 and the lower header 3 in all directions, completely separating the upper header 2 and the lower header 3 into multiple parts.

[0027] Furthermore, the fresh air inlet 6 and the exhaust air outlet 5 are located on the same side, and the fresh air passes vertically through each row of internally threaded finned tubes 1, forming a crossflow heat exchange with the vertically flowing exhaust air.

[0028] The dehumidification airflow inlet 4 and dehumidification airflow outlet 5 are respectively located at the upper and lower ends of the box body, the fresh air inlet 6 is located at the right end of the box body, and the fresh air outlet 7 is located at the left end of the box body; the dehumidification airflow enters the upper header 2 of the waste heat recovery unit from the dehumidification airflow inlet 4, flows into the first internally threaded finned tube 1 under the obstruction of the baffle 10, flows through the internally threaded turbulence component 103 on the metal pipe 102 of the first internally threaded finned tube 1, and accumulates in the lower header 3. Under the obstruction of the baffle 10, the airflow reverses and moves upward along the second internally threaded finned tube 1 to the upper header 2, and so on, forming a multi-stage "U-shaped" reversal flow path until it is finally discharged through the dehumidification airflow outlet 5;

[0029] At the same time, fresh air enters the waste heat recovery unit through the fresh air inlet 6 in a cross-flow manner. It flows through each row of internally threaded finned tubes 1 in the shell 8 and exchanges heat with the exhaust airflow through the metal fins 101 and metal pipes 102. Finally, the heated fresh air is output from the fresh air outlet 7, achieving the purpose of waste heat recovery and utilization.

[0030] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A multi-flow cross-flow dense drying oven dehumidification airflow waste heat recovery device, characterized in that: Includes a housing (8); the upper part of the housing (8) is provided with an upper manifold (2) and the lower part is provided with a lower manifold (3). The upper manifold (2) and the lower manifold (3) are vertically divided into multiple independent channels by a partition (10). The upper manifold (2) is connected to a dehumidifying airflow inlet (4) and the lower manifold (3) is connected to a dehumidifying airflow outlet (5). The dehumidifying airflow outlet (5) and the dehumidifying airflow inlet (4) are diagonally distributed. The shell (8) has multiple sets of internally threaded finned tubes (1) arranged vertically inside. The internally threaded finned tubes (1) are placed in parallel to each other. The inlet and outlet of the internally threaded finned tubes (1) are connected to the independent channels divided inside the upper header (2) and the lower header (3). The internally threaded finned tube (1) has an internally threaded flow-deflecting component (103) inside its metal pipe (102) and metal fins (101) outside its metal pipe (102); The housing (8) has a fresh air inlet (6) on the right side and a fresh air outlet (7) on the left side.

2. The multi-flow cross-flow dense drying oven dehumidification airflow waste heat recovery device according to claim 1, characterized in that: The independent channel inlets and outlets of the upper header (2) and lower header (3) are connected to the inlet and outlet of the internally threaded finned tube (1) to form a "U-shaped foldback" flow channel.

3. The multi-flow cross-flow dense drying oven dehumidification airflow waste heat recovery device according to claim 1, characterized in that: The total heat exchange area of ​​the internally threaded finned tube (1) is 2 to 3 times that of a single-pass design, and is used to extend the heat exchange time through a multi-pass crossflow layout.

4. The multi-flow cross-flow dense drying oven dehumidification airflow waste heat recovery device according to claim 1, characterized in that: The partition (10) is completely connected to the upper header (2) and the lower header (3) in all directions, completely separating the upper header (2) and the lower header (3) into multiple parts.

5. The multi-flow cross-flow dense drying oven dehumidification airflow waste heat recovery device according to claim 1, characterized in that: The fresh air inlet (6) and the exhaust air outlet (5) are located on the same side. The fresh air passes vertically through each row of internally threaded finned tubes (1) and forms a cross-flow heat exchange with the vertically flowing exhaust air.

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