An air humidifier

Abstract

The application discloses an air humidifier which is provided with an air inlet, an air outlet, a humidification backwater outlet, a humidification drainage outlet, a humidification water supplementing outlet, a hot fluid inlet and a hot fluid outlet; the flowing direction of air is the same as that of hot water for humidification, both of which adopt top-in and bottom-out, and the hot fluid for heating the humidification pipe flows into the hot fluid inlet at the bottom and flows out of the hot fluid outlet at the top. The baffle and the baffle plate are fixedly arranged on the air humidifier shell, one baffle is arranged on the top of the air humidifier and one baffle is arranged on the bottom of the air humidifier, and the baffle plate is arranged between the two baffles. The humidification backwater outlet is arranged above the upper baffle of the air humidifier, the humidification drainage outlet is arranged at the bottom of the air humidifier, and the height of the humidification backwater outlet is lower than that of the inlet at the top of the humidification pipe; the hot water for humidification flows into the air humidifier from the upper portion and flows out of the bottom, the hot water after humidifying the air flows out of the humidification drainage outlet and is circulated to the humidification backflow outlet through the pumping element.

Description

Technical Field

[0001] This invention belongs to the field of flue gas waste heat recovery and provides an air humidifier that can increase the gas velocity of the air to be heated and humidified without causing flooding, while ensuring that the air humidifier has a relatively compact structure and good heating and humidification effect. It also has the advantages of simple structure, small size, easy adjustment, low flow resistance and good humidification effect. Background Technology

[0002] The large amount of latent heat contained in flue gas can improve boiler efficiency and reduce gas consumption if utilized. Therefore, research on flue gas waste heat recovery and emission reduction for this type of gas-fired boiler is of significant value. Among numerous technical solutions, recovering the low-grade heat of flue gas to generate hot water, and then using this hot water to heat and humidify the air supplied to the gas-fired boiler, thereby increasing the flue gas dew point temperature, is a promising energy-saving and emission-reduction technology. One of the key processes in this technology is the air humidifier, which uses hot water to heat and humidify the air. The sensible heat of the hot water provides the heat required for evaporation, maximizing the humidity of the air. In this type of application, the most common air humidifier is a packed tower or a hollow tower. To fully utilize the sensible heat of the hot water, the air and hot water come into countercurrent contact in the tower; generally, the air flows from bottom to top, and the hot water flows from top to bottom. This humidification method boasts high heat and mass transfer efficiency, achieving high energy utilization efficiency. However, because air flows upward while hot water flows downward due to gravity, the operating air velocity is limited by the flooding velocity. Excessive air velocity can cause flooding, resulting in excessive pressure loss and significantly increased entrainment in the tower. Consequently, for high-flow-rate applications, this often leads to excessively large tower diameters. Therefore, it is necessary to research air humidifiers that are simple and compact in structure while ensuring effective humidification. Summary of the Invention

[0003] (I) Purpose of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned defects and deficiencies of the prior art and provide an air humidifier that can increase the air velocity of the air to be heated and humidified without causing flooding, while ensuring that the air humidifier has a relatively compact structure and good heating and humidification effect. It also has the advantages of simple structure, small size, easy adjustment, low flow resistance and good humidification effect.

[0005] (II) Technical Solution

[0006] To achieve the objective of this invention, the present invention adopts the following technical solution:

[0007] An air humidifier includes at least a hollow outer shell. Inside the outer shell are at least an upper partition, a lower partition, a plurality of humidification tubes, and a plurality of baffles. The side wall of the outer shell is provided with at least an air inlet, an air outlet, a humidification return water inlet, a humidification drain outlet, a heating fluid inlet, and a heating fluid outlet. The humidifier is characterized in that...

[0008] The upper partition is arranged horizontally and is located near the top of the outer shell, and its edges form a sealed structure with the side walls of the outer shell.

[0009] The lower partition is arranged horizontally and is located near the bottom of the outer shell, and its edges form a sealed structure with the side walls of the outer shell.

[0010] The upper partition and the top plate of the outer shell form an upper space, the lower partition and the bottom plate of the outer shell form a lower space, and the upper partition and the lower partition form a middle space.

[0011] Each of the humidification tubes is arranged vertically, and the humidification tubes are arranged in an array between the upper and lower partitions. The upper inlet of each humidification tube passes through the upper partition for a certain distance and communicates with the upper space, and the lower outlet passes through the lower partition and communicates with the lower space.

[0012] All of the aforementioned baffles are arranged horizontally and are arranged in the central space in a manner that is spaced apart from each other in the height direction and staggered in the horizontal direction;

[0013] The air inlet, humidification return water inlet, and heating fluid outlet are all located on the first side wall of the outer shell, and the air outlet and heating fluid inlet are all located on the second side wall of the outer shell. The second side wall and the first side wall are arranged opposite each other in the horizontal direction, and the humidification drain outlet is located on the bottom plate of the outer shell.

[0014] The air inlet and the humidification return water outlet are both connected to the upper space. The air inlet is located near the top plate of the outer shell and is positioned above the upper inlet of each humidification tube in the height direction. The humidification return water outlet is located near the upper partition and does not exceed the upper inlet of each humidification tube in the height direction.

[0015] The air outlet and the humidification drain outlet are both connected to the lower space;

[0016] The heating fluid inlet and heating fluid outlet are both connected to the central space. The heating fluid inlet is located near the lower partition in the height direction, and the heating fluid outlet is located near the upper partition in the height direction.

[0017] In the air humidifier of this invention, the airflow direction is the same as the flow direction of the humidifying hot water, both adopting a top-in, bottom-out configuration. The hot fluid used to heat the humidification tube flows in from the lower hot fluid inlet and out from the upper hot fluid outlet. This technical solution increases the air velocity without causing flooding, thereby reducing the structural size of the humidifier. Simultaneously, the humidity of the air can be controlled by adjusting the flow rates of the air, the humidifying hot water, and the hot water used to heat the humidification tube.

[0018] Preferably, the upper partition, lower partition, and each baffle are welded to the side wall of the outer shell of the air humidifier. One partition is provided at the top and one at the bottom of the air humidifier, and a baffle is provided between the two partitions. The number of baffles is n, where n = 0, 1, 2, ..., 1000. Through the above technical solution, the hot fluid used for heating the humidification tube, the air, and the hot water used for humidification can be separated, and the residence time of the hot fluid used for heating the humidification tube within the air humidifier can be controlled by the baffles.

[0019] Furthermore, the plurality of baffles includes at least an upper baffle and a lower baffle, the upper baffle being disposed on the first sidewall adjacent to the upper partition, and the lower baffle being disposed on the second sidewall adjacent to the lower partition.

[0020] Preferably, the humidification drain outlet is connected to the humidification return outlet via a pipe equipped with a pumping element. In the air humidifier of the present invention, a humidification return outlet is provided above the upper partition of the air humidifier, and a humidification drain outlet is provided at the bottom of the air humidifier. The height of the humidification return outlet is lower than the height of the inlet above the humidification pipe. Hot water for humidification flows in from the top of the air humidifier and flows out from the bottom. After humidifying the air through the humidification pipe, the hot water flows out from the humidification drain outlet and is circulated back to the humidification return outlet by the pumping element. Through the above technical solution, the hot water for humidification can be recycled, and the humidity of the air can be adjusted by controlling the water flow rate.

[0021] Preferably, a humidification water inlet is provided above the upper partition of the air humidifier. The humidification water inlet is located on the second side wall of the outer casing, and its height is lower than the upper inlet height of each humidification tube. Water is replenished to the air humidifier through the humidification water inlet. This technical solution effectively controls the total amount of circulating water used for humidification.

[0022] In the air humidifier of the present invention, an air outlet is provided below the lower partition and an air inlet is provided above the upper partition. The height of the air inlet is higher than the height of the humidification return water inlet, and the height of the air outlet is higher than the height of the humidification drain outlet. Air enters the air humidifier from the upper air inlet and flows out of the air humidifier from the lower air outlet. Through the above technical solution, air and water passing through the air humidifier can be effectively separated.

[0023] In the air humidifier of the present invention, a hot fluid inlet is provided between the lower partition and the lower baffle of the outer shell of the air humidifier, and a hot fluid outlet is provided between the upper partition and the upper baffle. The hot fluid enters the humidifier from the hot fluid inlet to heat the humidification tube, and flows out from the hot fluid outlet. Through the above technical solution, the air and the hot fluid, which serves as the heat source, still exchange heat in a countercurrent manner, which can reduce the temperature difference between the lower and upper parts of the humidification tube, making the temperature of the humidification tube more uniform and ensuring the heating and humidification effect.

[0024] Preferably, the heat transfer fluid used by the air humidifier to heat the humidification tube can be hot water or other heat-carrying fluids. Through the above technical solution, the air humidifier can also be applied to heat sources that are not suitable for contact with air, such as sewage or flue gas with a certain temperature.

[0025] Preferably, the heating method of the humidification tube of the air humidifier can also be electric heating, such as by wrapping a resistance wire around the humidification tube between the two partitions. Through the above technical solution, the structure of the humidification tube can be simplified, and temperature adjustment can be faster and more flexible.

[0026] Preferably, a downwardly inclined gas-liquid separation baffle is provided between the lower partition of the air humidifier and the air outlet. This technical solution causes the humid air to flow downwards first, then turn upwards again before exiting from the air outlet, reducing entrainment and promoting the separation of air and water.

[0027] (III) Technical Effects

[0028] Compared with the prior art, the air humidifier technology of the present invention brings the following beneficial and significant effects:

[0029] 1. The air humidifier of the present invention can increase the air velocity without causing flooding, thereby reducing the structural size of the air humidifier.

[0030] 2. In the air humidifier of the present invention, the air and the hot fluid, which is the heat source, still exchange heat in a countercurrent manner, thus ensuring the heating and humidification effect.

[0031] 3. The air humidifier of the present invention can control the humidity of the air by controlling the flow rate of the air, the flow rate of the hot water for humidification, and the flow rate of the hot fluid for heating the humidification tube.

[0032] 4. The air humidifier of the present invention can isolate the hot fluid used to heat the humidification tube from the air and the hot water used for humidification, and at the same time control the residence time of the hot fluid used to heat the humidification tube in the air humidifier through the baffle plate.

[0033] 5. The air humidifier of the present invention can effectively control the total amount of circulating hot water used for humidification, and at the same time, can regulate the humidity of the air by controlling the water flow rate.

[0034] 6. In the air humidifier of the present invention, the heat source fluid for humidifying the air can be hot water or other heat-carrying fluids.

[0035] 7. The air humidifier of the present invention can be applied to heat sources that are not suitable for contact with air, such as sewage or flue gas with a certain temperature. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the air humidifier structure of the present invention.

[0037] The components are as follows: 1. Air humidifier; 2. Humidification pipe; 3. Heating fluid outlet; 4. Humidification return water inlet; 5. Air inlet; 6. Upper baffle; 7. Humidification water supply inlet; 8. Upper baffle; 9. Lower baffle; 10. Heating fluid inlet; 11. Air outlet; 12. Lower baffle; 13. Humidification drain outlet; 14. Outer shell; 15. Gas-liquid separation baffle. Detailed Implementation

[0038] To better understand the present invention, the following embodiments further illustrate the content of the invention, so that the advantages and features of the invention can be more easily understood by those skilled in the art. It should be noted that the following descriptions are merely preferred embodiments of the present invention, but the content of the invention is not limited to the following embodiments. In fact, various modifications and variations can be made to the present invention without departing from the scope or spirit of the invention, which will be apparent to those skilled in the art. For example, features shown or described as part of one embodiment can be used with another embodiment to produce yet another embodiment. Therefore, it is intended that such modifications and variations be included within the scope of the appended claims and their equivalents.

[0039] like Figure 1As shown, in order to increase the air velocity of the air to be heated and humidified without causing flooding, and at the same time ensure that the air humidifier has a relatively compact structure and good heating and humidification effect, the present invention provides an air humidifier, which includes at least a hollow outer shell 14. The outer shell 14 contains at least an upper partition 6, a lower partition 12, a plurality of humidification pipes 2, and a plurality of baffles 8 and 9. The side wall of the outer shell 14 is provided with at least an air inlet 5, an air outlet 11, a humidification return water inlet 4, a humidification drain outlet 13, a heating fluid inlet 10, and a heating fluid outlet 3.

[0040] The upper baffle 6 is horizontally arranged and positioned near the top of the outer shell 14, with each edge forming a sealed structure with the side walls of the outer shell 14. The lower baffle 12 is horizontally arranged and positioned near the bottom of the outer shell 14, with each edge forming a sealed structure with the side walls of the outer shell 14. The upper baffle 6 and the top plate of the outer shell 14 form an upper space, the lower baffle 12 and the bottom plate of the outer shell 14 form a lower space, and the upper baffle 6 and the lower baffle 12 form a middle space. Each humidification pipe 2 is vertically arranged and arranged in an array between the upper baffle 6 and the lower baffle 12. The upper inlet of each humidification pipe 2 passes through the upper baffle 6 for a certain distance and connects to the upper space, while the lower outlet passes through the lower baffle 12 and connects to the lower space. Each baffle 8 and 9 is horizontally arranged and is arranged in a manner that is spaced apart in the vertical direction and staggered in the horizontal direction. Within the central space, air inlet 5, humidification return water inlet 4, and heating fluid outlet 3 are all located on the first side wall of the outer shell 14, while air outlet 11 and heating fluid inlet 10 are located on the second side wall of the outer shell 14. The second side wall and the first side wall are arranged opposite each other in the horizontal direction. Humidification drain outlet 13 is located on the bottom plate of the outer shell 14. Air inlet 5 and humidification return water inlet 4 are both connected to the upper space. Specifically, air inlet 5 is located near the top plate of the outer shell 14 and is positioned above the upper inlet of each humidification pipe 2 in the height direction. Humidification return water inlet 4 is located near the upper partition 6 and does not exceed the upper inlet of each humidification pipe 2 in the height direction. Air outlet 11 and humidification drain outlet 13 are both connected to the lower space. Heating fluid inlet 10 and heating fluid outlet 3 are both connected to the central space. Heating fluid inlet 10 is located near the lower partition 12 in the height direction, and heating fluid outlet 3 is located near the upper partition 6 in the height direction.

[0041] More specifically, such as Figure 1As shown, the air humidifier 1 of the present invention comprises a hollow outer shell 14, a humidification tube 2, an upper partition 6, a lower partition 12, an upper baffle 8, and a lower baffle 9. The air humidifier 1 is provided with an air inlet 5, an air outlet 11, a humidification return water inlet 4, a humidification drain outlet 13, a humidification water supply inlet 7, a heating fluid inlet 10, and a heating fluid outlet 3. The air flow direction is the same as the flow direction of the hot water used for humidification, both adopting an upper inlet and lower outlet configuration. The hot fluid used to heat the humidification tube 2 flows in from the lower heating fluid inlet 10 and flows out from the upper heating fluid outlet 3, which can increase the air velocity without causing flooding, thereby reducing the diameter of the air humidifier 1. At the same time, the humidity of the air is controlled by controlling the flow rate of the air, the flow rate of the hot water used for humidification, and the flow rate of the hot fluid used to heat the humidification tube 2.

[0042] The upper baffle 6, lower baffle 12, upper baffle 8, and lower baffle 9 are welded to the left side wall of the outer shell 14 of the air humidifier 1. An upper baffle 6 and a lower baffle 12 are respectively installed at the top and bottom of the air humidifier 1, and the upper baffle 8 and lower baffle 9 are installed between the two baffles 6 and 12. This isolates the hot fluid used to heat the humidification tube 2 from the air and the hot water used for humidification, while simultaneously controlling the residence time of the hot fluid used to heat the humidification tube 2 within the air humidifier 1 via the upper baffle 8 and lower baffle 9.

[0043] The air humidifier 1 has a humidification return water inlet 4 above the upper partition 6 and a humidification drain outlet 13 at the bottom. The height of the humidification return water inlet 4 is lower than the height of the upper inlet of the humidification pipe 2. The hot water for humidification flows in from the top of the air humidifier 1 and flows out from the bottom. After humidifying the air through the humidification pipe 2, the hot water flows out from the humidification drain outlet 13 and is circulated back to the humidification return water inlet 4 through the pumping element. The hot water for humidification can be recycled. At the same time, the humidity of the air can be adjusted by controlling the water flow.

[0044] A humidification water inlet 7 is provided above the upper partition 6 of the air humidifier 1. The height of the humidification water inlet 7 is lower than the height of the upper inlet of the humidification pipe 2. Water is replenished to the air humidifier 1 through the humidification water inlet 7, effectively controlling the total amount of circulating hot water used for humidification.

[0045] An air outlet 11 is provided below the lower partition 12 of the air humidifier 1, and an air inlet 5 is provided above the upper partition 6. The height of the air inlet 5 is higher than the height of the humidification return water inlet 4, and the height of the air outlet 11 is higher than the height of the humidification drain outlet 13. Air enters the air humidifier 1 from the upper air inlet 5 and flows out of the air humidifier 1 from the lower air outlet 11. The air and water are effectively separated by the gas-liquid separation baffle 15.

[0046] A hot fluid inlet 10 is provided between the lower partition 12 and the lower baffle 9 of the outer shell 14 of the air humidifier 1, and a hot fluid outlet 3 is provided between the upper partition 6 and the upper baffle 8. The hot fluid enters the air humidifier 1 through the hot fluid inlet 10 to heat the humidification tube 2 and flows out through the hot fluid outlet 3. This ensures that the air and the hot fluid, which is the heat source, still exchange heat in a countercurrent manner, which can reduce the temperature difference between the lower and upper parts of the humidification tube 2, make the temperature of the humidification tube 2 more uniform, and ensure the heating and humidification effect.

[0047] The heat transfer fluid used by the air humidifier 1 to heat the humidification tube 2 can be hot water or other heat-carrying fluids. The air humidifier 1 can be used with heat sources that are not suitable for contact with air, such as sewage or flue gas with a certain temperature.

[0048] The humidification tube 2 of the air humidifier 1 can also be heated by electric heating, or by wrapping a resistance wire around the humidification tube 2 between the two partitions 6 and 12, which makes the structure of the humidification tube 2 simpler and the temperature adjustment faster and more flexible.

[0049] The objectives of this invention have been fully and effectively achieved through the above embodiments. All equivalent or simple variations made to the structures, features, and principles described in this patent concept are included within the protection scope of this patent. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this invention or exceed the scope defined in these claims, all of which should fall within the protection scope of this invention.

Claims

1. An air humidifier, comprising at least a hollow outer shell, wherein at least an upper partition, a lower partition, a plurality of humidification tubes, and a plurality of baffles are disposed within the outer shell, and at least an air inlet, an air outlet, a humidification return water inlet, a humidification drain outlet, a heating fluid inlet, and a heating fluid outlet are disposed on the side wall of the outer shell, characterized in that, The upper partition is arranged horizontally and is located near the top of the outer shell, and its edges form a sealed structure with the side walls of the outer shell. The lower partition is arranged horizontally and is located near the bottom of the outer shell, and its edges form a sealed structure with the side walls of the outer shell. The upper partition and the top plate of the outer shell form an upper space, the lower partition and the bottom plate of the outer shell form a lower space, and the upper partition and the lower partition form a middle space. Each of the humidification tubes is arranged vertically, and the humidification tubes are arranged in an array between the upper and lower partitions. The upper inlet of each humidification tube passes through the upper partition for a certain distance and communicates with the upper space, and the lower outlet passes through the lower partition and communicates with the lower space. All of the aforementioned baffles are arranged horizontally and are arranged in the central space in a manner that is spaced apart from each other in the height direction and staggered in the horizontal direction; The air inlet, humidification return water inlet, and heating fluid outlet are all located on the first side wall of the outer shell, and the air outlet and heating fluid inlet are all located on the second side wall of the outer shell. The second side wall and the first side wall are arranged opposite each other in the horizontal direction, and the humidification drain outlet is located on the bottom plate of the outer shell. The air inlet and the humidification return water outlet are both connected to the upper space. The air inlet is located near the top plate of the outer shell and is positioned above the upper inlet of each humidification tube in the height direction. The humidification return water outlet is located near the upper partition and does not exceed the upper inlet of each humidification tube in the height direction. The air outlet and the humidification drain outlet are both connected to the lower space; The heating fluid inlet and heating fluid outlet are both connected to the central space. The heating fluid inlet is located near the lower partition in the height direction, and the heating fluid outlet is located near the upper partition in the height direction.

2. The air humidifier according to claim 1, characterized in that, The upper partition, lower partition, and each of the baffles are welded to the side wall of the air humidifier housing. A partition is provided at the top and bottom of the air humidifier, and a baffle is provided between the two partitions. The number of baffles is n, where n = 0, 1, 2, ..., 1000.

3. The air humidifier according to claim 2, characterized in that, The plurality of baffles includes at least an upper baffle and a lower baffle. The upper baffle is disposed on the first side wall adjacent to the upper partition, and the lower baffle is disposed on the second side wall adjacent to the lower partition.

4. The air humidifier according to claim 1, characterized in that, The humidifier drain outlet is connected to the humidifier return water outlet through a pipeline equipped with a pumping element.

5. The air humidifier according to claim 1, characterized in that, The air humidifier has a humidification water inlet above the upper partition. The humidification water inlet is located on the second side wall of the outer casing, and the height of the humidification water inlet is lower than the height of the upper inlet of each humidification tube. When the amount of hot water for circulating humidification is insufficient, water is added to the air humidifier through the humidification water inlet.

6. The air humidifier according to claim 1, characterized in that, The fluid used to heat the humidification tube is hot water or other heat-carrying fluid.

7. The air humidifier according to claim 1, characterized in that, Heating resistance wire is wound around the outer wall of the humidification tube between the upper and lower partitions.

8. The air humidifier according to claim 1, characterized in that, A downwardly inclined gas-liquid separation baffle is provided between the lower partition and the air outlet.

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