Cold and hot air channel exchange system with guide structure

Abstract

The utility model belongs to the technical field of cold and hot air channel exchange systems, and relates to a cold and hot air channel exchange system with a guide structure, which comprises a main cold air channel, a first preheating assembly, a flow guide assembly and at least two sub cold air channels, the at least two sub cold air channels are connected with air feeders; the main cold air channel is communicated with each sub cold air channel; the air inlet end of the first preheating assembly communicates with the air outlet end of the main cold air channel, and the air outlet end communicates with the boiler. The flow guide assembly is installed at the intersection of the air outlet flow of the main cold air channel and the air outlet flow of the at least two sub cold air channels. According to the utility model, the flow guide assembly is arranged at the junction of the outlet air flows of the at least two sub cold air channels, and the flow guide assembly guides the outlet air of the sub cold air channels, so that the direct hedging and collision between the outlet air flows of different sub cold air channels are reduced, and the turbulent flow phenomenon generated when the air flows are converged in the main cold air channel is avoided; the flow resistance of air flow in the main cold air channel is reduced, and then the energy consumption of the air feeder is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cold and hot air passage exchange systems, and particularly relates to a cold and hot air passage exchange system with a guide structure. BACKGROUND

[0002] In a boiler combustion system, cold and hot air passage exchange is a key link for ensuring combustion efficiency and heat energy recovery, and the cold and hot air passage provides necessary combustion air for the boiler and effectively discharges flue gas generated by combustion. Smooth running of airflow in the cold and hot air passage is directly related to the combustion efficiency of the boiler, the heat energy recovery rate, and the economy of overall operation of the boiler combustion system.

[0003] There is some research on cold and hot air passage exchange systems in the prior art. For example, a patent document with application number 202010740660.9 discloses a flue assembly, which includes: a main flue; a first flue; a second flue; a third flue; a communication flue, the first flue, the second flue, and the third flue are all communicated with the main flue through the communication flue, and the first flue is located at a first side of the main flue, and the second flue and the third flue are located at a second side of the main flue; a guide plate, the guide plate is arranged in the communication flue and separates the flue gas entering the communication flue from the second flue from the flue gas entering the communication flue from the third flue.

[0004] As can be seen, the guide plate separates the flue gas entering the communication flue from the second flue from the flue gas entering the communication flue from the third flue, thereby achieving the diversion and guidance of the flue gas and avoiding the mutual interference of airflow in the flue. However, when multiple air supply fans simultaneously deliver combustion air to the main flue, the airflow at the outlets of the air supply fans collides with each other, which causes turbulent flow when the airflow converges in the main flue. The turbulent airflow increases the flow resistance of the combustion air, resulting in increased energy consumption of the air supply fan. SUMMARY

[0005] To solve the technical problem that the airflow at the outlets of the air supply fans collides with each other when multiple air supply fans simultaneously deliver combustion air to the main flue, which causes turbulent flow when the airflow converges in the main flue, and the turbulent airflow increases the flow resistance of the combustion air, resulting in increased energy consumption of the air supply fan, the utility model provides a cold and hot air passage exchange system with a guide structure.

[0006] The cold and hot air passage exchange system with a guide structure of the utility model sets a guide assembly at the convergence of the airflow at the outlets of at least two sub-cold air passages, the guide assembly guides the airflow at the outlets of the sub-cold air passages, reduces the direct collision between the airflow at the outlets of different sub-cold air passages, avoids turbulent flow when the airflow converges in the main cold air passage, reduces the flow resistance of the airflow in the main cold air passage, and further reduces the energy consumption of the air supply fan.

[0007] To solve the above technical problems, the utility model provides the following technical scheme:

[0008] A cold and hot air passage exchange system with a guide structure, comprising: a main cold air passage, a first preheating component, a guide component, and at least two sub-cold air passages; at least two of the sub-cold air passages are connected with air supply fans; the inlet end of the main cold air passage is in communication with the outlet end of each sub-cold air passage; the air inlet end of the first preheating component is in communication with the air outlet end of the main cold air passage, the air outlet end of the first preheating component is in communication with a boiler, and the first preheating component provides combustion-supporting air for the boiler; the guide component is installed at the intersection of the air flow of the main cold air passage and the at least two sub-cold air passages.

[0009] In a specific implementable embodiment, the first preheating component is an air preheater; the air inlet end of the air preheater is in communication with the air outlet end of the main cold air passage, and the air outlet end of the air preheater is in communication with the boiler.

[0010] In a specific implementable embodiment, the guide component comprises a plurality of guide plates; the bottom of each of the plurality of guide plates is fixedly connected with the main cold air passage, and the top of each of the plurality of guide plates is fixedly connected with each other; the guide plates are arranged in an inclined manner, the bottom of each of the guide plates is close to the outlet end of at least one sub-cold air passage, the top of each of the guide plates extends to the outlet end of the main cold air passage, and the guide surface of each of the guide plates is arranged opposite to the incoming direction of the cold air flow.

[0011] In a specific implementable embodiment, the guide component comprises at least two locking members and guide plates corresponding in number to the locking members; the bottom of each of the at least two guide plates is movably connected with the main cold air passage, and the top of each of the plurality of guide plates is fixedly connected with each other; the guide plates are arranged in an inclined manner, the bottom of each of the guide plates is close to the outlet end of the sub-cold air passage, the top of each of the guide plates extends to the outlet end of the main cold air passage, and the guide surface of each of the guide plates is arranged opposite to the incoming direction of the cold air flow; the bottom of each of the guide plates is connected with the cold air passage through the locking member.

[0012] In a specific implementable embodiment, the guide surface of each of the guide plates is in a streamline shape.

[0013] In a specific implementable embodiment, the inclination angle of each of the guide plates ranges from 30° to 60°.

[0014] In a specific implementable embodiment, the height of each of the guide plates ranges from 300 mm to 370 mm.

[0015] In a specific implementable embodiment, the cold and hot air passage exchange system with the guide structure further comprises a second preheating component; the second preheating component is installed on the main cold air passage, and the second preheating component is used for preheating the air flow in the main cold air passage.

[0016] In one specific embodiment, the cold and hot air passage exchange system with a guide structure further comprises a hot air passage; and the air outlet end of the air preheater is communicated with the boiler through the hot air passage.

[0017] In one specific embodiment, the cold and hot air passage exchange system with a guide structure further comprises a cold and hot air mixing pipe; the air inlet end of the cold and hot air mixing pipe is connected with the side wall of the cold air pipe, and the air outlet end of the cold and hot air mixing pipe is connected with the side wall of the hot air pipe.

[0018] In summary, the utility model has the following beneficial technical effects:

[0019] 1. The cold and hot air passage exchange system with a guide structure sets a guide component at the intersection of the air outlet flow of at least two sub-cold air passages, the guide component guides the air outlet of the sub-cold air passage, reduces the direct collision between the air outlet flow of different sub-cold air passages, avoids the turbulence phenomenon when the air flow intersects in the main cold air passage, reduces the flow resistance of the air flow in the main cold air passage, and further reduces the energy consumption of the air supply fan.

[0020] 2. The cold and hot air passage exchange system with a guide structure sets a second preheating component on the cold air passage, preheats the temperature of the air flow in the main cold air passage, prevents the air flow in the main cold air passage from being directly eroded into the air inlet end of the air preheater due to the low temperature, and reduces the damage risk of the air preheater caused by low temperature corrosion.

[0021] 3. The cold and hot air passage exchange system with a guide structure sets a cold and hot air mixing pipe, which is convenient for the operator to directly introduce the low-temperature air flow in the main cold air passage into the hot air passage, adjust the mixing ratio of the low-temperature air flow and the high-temperature air flow in the hot air passage, and further adjust the temperature of the combustion-supporting air delivered to the inside of the boiler, prevent the boiler from being damaged due to the high temperature of the combustion-supporting air, and ensure the stability and safety of the boiler combustion. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall structure schematic view of the cold and hot air passage exchange system with a guide structure.

[0023] Mark explanation: 1, main cold air passage; 11, sub-cold air passage; 2, air preheater; 3, hot air passage; 4, guide component; 41, guide plate; 5, second preheating component; 6, cold and hot air mixing pipe; 7, maintenance cover. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be further explained and described below in combination with the drawings and embodiments, but the utility model is not limited to the following described embodiments.

[0025] Reference Figure 1The application discloses a cold-hot air channel exchange system with a guide structure, which comprises a main cold air channel 1, a first preheating assembly 2, a guide assembly 4 and at least two sub cold air channels 11.

[0026] In the utility model, the main cold air channel 1 comprises a conveying section and an inlet section connected with the conveying section. The outlet end of the conveying section is communicated with the air inlet end of the first preheating assembly 2, the air inlet end of the conveying section is communicated with the air outlet end of the inlet section, and the conveying section is vertically arranged. The inlet section is in the inverted T-shaped structure, the sub cold air channel 11 is communicated with the vertical part of the inlet section, and the guide assembly is connected with the horizontal part of the inlet section.

[0027] In the utility model, the number of the sub cold air channels 11 is not limited, and the number of the sub cold air channels 11 can be appropriately set so that the required amount of combustion-supporting air can be input into the main cold air channel 1 through the sub cold air channels 11. In the utility model, the number of the sub cold air channels 11 is two, and the outlet ends of the two sub cold air channels 11 are communicated with the inlet section of the main cold air channel 1.

[0028] In the utility model, the first preheating assembly 2 can be an electric heater, a steam heater or the like, and the first preheating assembly 2 can be arranged in any arrangement mode for preheating the air flow in the sub cold air channel 11.

[0029] Referring to Figure 1 The guide assembly 4 comprises a plurality of guide plates 41. The guide assembly 4 comprises a plurality of guide plates 41. The bottom of each guide plate 41 is fixedly connected with the main cold air channel 1, and the top of each guide plate 41 is fixedly connected with each other. The guide plates 41 are arranged in an inclined manner, the bottom of each guide plate 41 is close to the outlet end of at least one sub cold air channel 11, the top of each guide plate 41 extends to the outlet end of the main cold air channel 1, and the guide surface of each guide plate 41 is arranged opposite to the direction of the incoming cold air flow. The guide surface of each guide plate 41 is in the streamline shape. The inclination angle of each guide plate 41 ranges from 30° to 60°. The height of each guide plate 41 ranges from 100 mm to 300 mm.

[0030] In the utility model, the guide plate 41 is obliquely arranged, so that the air flow of each sub cold air passage 11 is gradually flowed to the top of the guide plate 41 along the bottom of the guide plate 41 under the block of the guide plate 41 after entering the main cold air passage 1, and then continues to flow along the extension direction of the main cold air passage 1, reduces the direct collision between the air flows of different sub cold air passages 11, and avoids the turbulence phenomenon when the air flows meet in the main cold air passage 1.

[0031] In the utility model, the guide plate 41 can be arranged as two, three or four, and the proper number of guide plates 41 is arranged so that the air flow of the sub cold air passage 11 can be guided by the guide assembly 4.

[0032] In the utility model, the inclination angle of each guide plate 41 can be 30°, 45° or 60°, and the inclination angle of each guide plate 41 is 45° in the utility model.

[0033] In the utility model, the height of the guide plate 41 can be 300mm, 335mm or 370mm, and the height of the guide plate 41 is 335mm in the utility model.

[0034] In the utility model, the guide surface of the guide plate 41 can be triangular, trapezoidal or streamline, and the shape of the guide plate 41 is not limited, and the guide plate 41 with a proper shape is arranged so that the air flow of the sub cold air passage 11 can be guided by the guide plate 41; in the utility model, the guide surface of the guide plate 41 is streamline, the guide plate 41 with the streamline shape has good guide effect, and further reduces the flow resistance of the air flow in the main cold air passage 1.

[0035] Embodiment 1

[0036] Refer to Figure 1 The cold and hot air passage exchange system with the guide structure comprises a guide assembly, a main cold air passage 1 and a plurality of sub cold air passages 11. The guide assembly comprises at least two locking pieces and guide plates 41 corresponding to the number of the locking pieces. The bottoms of the at least two guide plates 41 are movably connected with the main cold air passage 1, and the tops of the plurality of guide plates 41 are fixedly connected with each other. The guide plates 41 are obliquely arranged, the bottom of the guide plate 41 is close to the outlet end of the sub cold air passage 11, the top of the guide plate 41 extends to the outlet end of the main cold air passage 1, the guide surface of the guide plate 41 is arranged opposite to the flow direction of the cold air, and the bottom of the guide plate 41 is connected with the main cold air passage 1 through the locking piece.

[0037] Specifically, the locking member is a bolt and a nut combination; the horizontal portion of the inlet section is provided with a plurality of screw holes matched with the bolt, the plurality of screw holes are distributed along the radial direction of the horizontal portion of the inlet section, the bottom of the guide plate 41 is provided with nuts corresponding to the screw holes, during installation, the bolt is inserted through the hole in the bottom of the guide plate 41 and aligned with the screw hole of the horizontal portion of the inlet section, and then the nut is rotated to fix the position of the guide plate 41.

[0038] In this embodiment, the bottom of the guide plate 41 is movably connected to the main cold air passage 1, and the position of the guide plate 41 on the main cold air passage 1 is fixed by the locking member, so that the operator can flexibly adjust the inclination angle of the guide plate 41 according to actual needs, thereby adapting to the air flow guiding requirements under different air supply volumes of the air supply machine and improving the adaptability of the cold and hot air passage exchange system with the guide structure to various working conditions.

[0039] Embodiment 2:

[0040] Referring to Figure 1 , the cold and hot air passage exchange system with the guide structure in this embodiment has a first preheating assembly 2, which is an air preheater. The air inlet end of the air preheater is in communication with the air outlet end of the main cold air passage 1, and the air outlet end of the air preheater is in communication with the boiler.

[0041] In this embodiment, the flue gas generated by the combustion of the boiler is transported to the air inlet end of the air preheater, and in the air preheater, the air flow from the main cold air passage 1 exchanges heat with the flue gas, and after absorbing the heat of the flue gas, the air flow becomes hot air, which is then transported to the boiler through the hot air passage 3 to provide the required hot air for the combustion of the boiler.

[0042] Embodiment 3:

[0043] Referring to Figure 1 , the cold and hot air passage exchange system with the guide structure in this embodiment further comprises a hot air passage 3. The air outlet end of the air preheater is in communication with the boiler through the hot air passage 3.

[0044] Embodiment 4:

[0045] Referring to Figure 1 , the cold and hot air passage exchange system with the guide structure in this embodiment further comprises a second preheating assembly 5 on the basis of embodiment 3. The second preheating assembly 5 is installed on the main cold air passage 1, and the preheating assembly is used to preheat the air flow in the main cold air passage 1.

[0046] In this embodiment, the second preheating assembly 5 is provided on the cold air passage 1 to preheat the temperature of the air flow in the main cold air passage 1, so as to prevent the air flow in the main cold air passage 1 from being too low to directly erode the air inlet end of the air preheater 2, thereby reducing the risk of damage to the air preheater 2 caused by low-temperature corrosion.

[0047] Embodiment 5

[0048] With reference to Figure 1 The cold and hot air passage exchange system with a guide structure in this embodiment is based on Embodiment 4, and the second preheating assembly 5 is a warm air machine.

[0049] Specifically, the second preheating assembly 5 can be a warm air machine, an electric heater, a steam heater, etc. By setting the second preheating assembly 5, the temperature of the air flow in the main cold air passage 1 can be raised in advance. In this embodiment, the second preheating assembly 5 is a warm air machine, the air inlet end of which is arranged close to the air inlet end of the main cold air passage 1, and the air outlet end of which is arranged close to the air preheater 2.

[0050] Embodiment 6

[0051] With reference to Figure 1 The cold and hot air passage exchange system with a guide structure in this embodiment is based on Embodiment 3, and further comprises a cold and hot air mixing pipe 6. The air inlet end of the cold and hot air mixing pipe 6 is connected to the side wall of the main cold air passage 1, and the air outlet end of the cold and hot air mixing pipe 6 is connected to the side wall of the hot air passage 3.

[0052] Specifically, the air inlet end of the cold and hot air mixing pipe 6 is connected to the main cold air passage 1 through a flange, and the air outlet end of the cold and hot air mixing pipe 6 is connected to the hot air passage 3 through a flange. A valve is connected to the cold and hot air mixing pipe 6 to adjust the state of the connection between the cold and hot air mixing pipe 6 and the cold air passage 1.

[0053] In this embodiment, the cold and hot air mixing pipe 6 is arranged to facilitate the operation personnel to directly introduce the low-temperature air flow in the main cold air passage 1 into the hot air passage 3, to adjust the mixing ratio of the low-temperature air flow and the high-temperature air flow in the hot air passage 3, and to further adjust the temperature of the combustion-supporting air delivered to the inside of the boiler, so as to prevent the boiler from being damaged due to the excessively high temperature of the combustion-supporting air and to ensure the stability and safety of the boiler combustion.

[0054] Embodiment 7

[0055] With reference to Figure 1 The cold and hot air passage exchange system with a guide structure in this embodiment is based on Embodiment 3, and further comprises a cold and hot air mixing pipe 6. The air inlet end of the cold and hot air mixing pipe 6 is connected to the side wall of the main cold air passage 1, and the air outlet end of the cold and hot air mixing pipe 6 is connected to the side wall of the hot air passage 3.

[0056] In this embodiment, the cold and hot air mixing pipe 6 is arranged to facilitate the operation personnel to directly introduce the low-temperature air flow in the main cold air passage 1 into the hot air passage 3, to adjust the mixing ratio of the low-temperature air flow and the high-temperature air flow in the hot air passage 3, and to further adjust the temperature of the combustion-supporting air delivered to the inside of the boiler, so as to prevent the boiler from being damaged due to the excessively high temperature of the combustion-supporting air and to ensure the stability and safety of the boiler combustion.

[0057] The working principle of the cold-hot air passage exchange system with the guide structure is as follows: after the air outflow of the sub cold air passage 11 enters the main cold air passage 1, the air outflow is blocked by the flow guide plate 41, and then gradually flows to the top of the flow guide plate 41 along the bottom of the flow guide plate 41, and then continues to flow along the extension direction of the cold air passage 1; the air outflow flows to the second preheating assembly 5, the second preheating assembly 5 performs primary preheating on the air flow in the cold air passage 1; the air flow after the primary preheating continues to flow into the air preheater 2 to perform secondary preheating; the air flow after the secondary preheating flows along the hot air passage 3 to the boiler.

[0058] When the temperature of the air flow in the hot air passage 3 is too high, the air inlet end of the cold-hot air mixing pipe 6 is communicated with the cold air passage 1, the air outlet end of the cold-hot air mixing pipe 6 is communicated with the hot air passage 3, the air flow in the cold air passage 1 directly flows into the hot air passage 3, mixes with the air flow in the hot air passage 3, and then the temperature of the air flow in the hot air passage 3 is reduced.

[0059] The preferable embodiment of the utility model is not limited to the protection scope of the utility model, and therefore: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A hot and cold air exchange system with a guiding structure, characterized in that, include: At least two sub-cooled air channels (11), and each of the at least two sub-cooled air channels (11) is connected to a blower; The main cold air channel (1) is connected to the outlet of each sub-cold air channel (11). The first preheating component (2) has its air inlet end connected to the air outlet end of the main cold air channel (1), and its air outlet end connected to the boiler. The first preheating component (2) provides combustion air to the boiler. And a flow guiding component (4), which is installed at the intersection of the main cold air channel (1) and the airflow of at least two sub-cold air channels (11).

2. The hot and cold air exchange system with a guide structure according to claim 1, characterized in that: The first preheating component (2) is an air preheater; The air inlet of the air preheater is connected to the air outlet of the main cold air channel (1), and the air outlet of the air preheater is connected to the boiler.

3. The hot and cold air exchange system with a guide structure according to claim 2, characterized in that: The flow guiding assembly (4) includes multiple flow guiding plates (41); The bottom of each of the multiple guide vanes (41) is fixedly connected to the main cold air channel (1), and the tops of the multiple guide vanes (41) are fixedly connected to each other; The guide plate (41) is inclined, and the bottom of the guide plate (41) is close to the outlet end of at least one sub-cold air channel (11). The top of the guide plate (41) extends toward the outlet end of the main cold air channel (1). The guide surface of the guide plate (41) is set opposite to the direction of the incoming flow of cold air.

4. The hot and cold air exchange system with a guide structure according to claim 2, characterized in that: The flow guiding assembly (4) includes at least two locking elements and a flow guiding plate (41) corresponding to the number of locking elements; The bottoms of at least two of the guide vanes (41) are movably connected to the main cold air channel (1), and the tops of the plurality of guide vanes (41) are fixedly connected to each other; The guide plate (41) is inclined, and the bottom of the guide plate (41) is close to the outlet end of the sub-cold air channel (11), the top of the guide plate (41) extends towards the outlet end of the main cold air channel (1), and the guide surface of the guide plate (41) is set opposite to the direction of the incoming flow of cold air. The bottom of the guide plate (41) is connected to the cold air channel (1) by a locking member.

5. The hot and cold air exchange system with a guide structure according to claim 3 or 4, characterized in that: The guide surface of the guide plate (41) is streamlined.

6. The hot and cold air exchange system with a guide structure according to claim 5, characterized in that: The tilt angle of the guide plate (41) is in the range of 30°-60°.

7. The hot and cold air exchange system with a guide structure according to claim 5, characterized in that: The height range of the guide plate (41) is 300mm-370mm.

8. The hot and cold air exchange system with a guide structure according to any one of claims 2-7, characterized in that: The hot and cold air exchange system with a guide structure also includes a second preheating component (5); The second preheating component (5) is installed on the main cold air duct (1), and the second preheating component (5) is used to preheat the airflow in the main cold air duct (1).

9. The hot and cold air exchange system with a guide structure according to claim 8, characterized in that: The hot and cold air exchange system with a guide structure also includes a hot air channel (3); The air preheater's outlet is connected to the boiler via a hot air channel (3).

10. The hot and cold air exchange system with a guide structure according to claim 9, characterized in that: The hot and cold air exchange system with a guide structure also includes a hot and cold air mixing pipe (6); The air inlet of the hot and cold air mixing pipe (6) is connected to the side wall of the main cold air channel (1), and the air outlet of the hot and cold air mixing pipe (6) is connected to the side wall of the hot air channel (3).

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