Gas-gas energy-saving heat exchanger suitable for washing powder drying waste gas treatment

Abstract

The utility model discloses a gas-gas energy-saving heat exchanger suitable for washing powder drying waste gas treatment, which comprises a box body and a plurality of partition plates arranged in the box body, and a hot air inlet, a hot air outlet, a cold air inlet and a cold air outlet are arranged in the box body; the partition plates are arranged in the box body in parallel, a plurality of spraying devices are arranged above the partition plates, each spraying device comprises a collecting pipe and a plurality of branch pipes communicated with the collecting pipe, the branch pipes are parallel to one another, the axis where the branch pipes are located is perpendicular to the partition plates, a plurality of spray heads are arranged on the branch pipes, and the spray heads are communicated with the collecting pipe. The spray heads comprise large spray heads and small spray heads, and the spray heads arranged on the two adjacent branch pipes are different in size; high-temperature gas enters the box body from the hot air inlet, low-temperature gas enters the box body from the cold air inlet, the high-temperature gas and the low-temperature gas flow out of the hot air outlet and the cold air outlet respectively after being converged and subjected to heat exchange between the partition plates in the box body, and the spraying device sprays water towards the partition plates.

Description

Technical Field

[0001] The utility model belongs to the field of heat exchangers, and in particular relates to an air-to-air energy-saving heat exchanger suitable for treating waste gas from washing powder drying. Background Art

[0002] An air-to-air heat exchanger is a heat exchange device that uses the temperature difference between two air streams of different temperatures to transfer heat. This device is widely used in industrial and commercial fields to improve energy efficiency and reduce operating costs. The operating principle of an air-to-air heat exchanger is relatively simple, but achieving efficient heat transfer requires sophisticated design and manufacturing. It usually consists of a series of parallel tubes or plates that are divided into two independent airflow channels. One airflow (usually the cooler airflow) passes through one channel, while the other airflow (usually the hotter airflow) passes through the other channel. As the two airflows flow between the tubes or plates, heat is transferred from the higher temperature airflow to the lower temperature airflow. This transfer process is achieved through heat conduction, convection, and radiation effects through the tubes or plates.

[0003] During the laundry detergent production process, it undergoes a drying process. The resulting exhaust gas contains significant amounts of water and detergent particles. The current drying exhaust gas output is 100,000 Nm³ / h, with a water content of 11 T / h. After cyclonic dust removal, the maximum particle content at this point is 120 g / m³. The temperature is 80°C, with a dew point of approximately 60°C. This results in a strong white mist and odor, causing frequent complaints from surrounding residents. Conventional plate-type air-to-air heat exchangers are prone to clogging. Particles contained in the exhaust gas enter the circulation tank, causing increased foam and particles, which can easily block the tank's circulation and cooling, disrupting the entire system. The handling of the detergent inside is a challenge. Although soluble in water, low volumes of water can easily cause it to solidify, making it difficult to dissolve. Furthermore, dust accumulates on the heat exchanger plates, causing clogging. Furthermore, some of the heat generated during the heat exchange process cannot be recycled for energy-saving purposes, resulting in significant natural gas losses. Summary of the Invention

[0004] In response to the problems in the related technology, the utility model proposes an air-to-air energy-saving heat exchanger suitable for the treatment of laundry detergent drying waste gas. In the process of treating the waste gas generated during the laundry detergent drying process, a spray device is set in the box to clean the partition during the heat exchange process, thereby avoiding dust accumulation and the formation of particle agglomerates, which in turn cause blockage, and at the same time achieve the effect of circulating cooling.

[0005] The utility model is achieved in this way:

[0006] An air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas comprises a housing and a plurality of partitions arranged in the housing, wherein the upper portion of the housing is provided with a hot air inlet, and the lower portion of the housing is provided with a hot air outlet; a longitudinal hot air channel is formed between the hot air inlet and the hot air outlet; a cold air inlet is provided on one side of the housing, and a cold air outlet opposite to the cold air inlet is provided on the other side; a transverse cold air channel is formed between the cold air inlet and the cold air outlet;

[0007] The partitions are arranged parallel to each other inside the box, and the axes of the partitions and the hot air channel are parallel to each other, and the axes of the partitions and the cold air channel are parallel to each other; high-temperature gas enters the box through the hot air inlet, and low-temperature gas enters the box through the cold air inlet. After the high-temperature gas and the low-temperature gas meet and exchange heat between the partitions inside the box, they flow out through the hot air outlet and the cold air outlet respectively;

[0008] A plurality of spray devices are provided above the partition, and the spray devices include a header and a plurality of branch pipes connected to the header, the branch pipes are parallel to each other, and the axis of the branch pipe is perpendicular to the partition, and a plurality of nozzles are provided on the branch pipe, and the nozzles include large nozzles and small nozzles, and the nozzles provided on two adjacent branch pipes are of different sizes; the spray device is interconnected with an external water source through the header, and water flows to each branch pipe through the header, and is sprayed toward the partition by the large nozzles and / or small nozzles on each branch pipe.

[0009] The partition is a heat exchange plate.

[0010] The gas temperature at the hot air inlet is about 80 degrees, and the temperature at the cold air inlet is about 20 degrees. After heat exchange, the gas temperature at the hot air outlet is about 62 degrees, and the temperature at the cold air outlet is about 55 degrees.

[0011] Preferably, the collecting pipe is provided with a water inlet, which is located outside the box body. Water is introduced into the collecting pipe through the water inlet and flows into the branch pipes respectively.

[0012] Specifically, the spray device mainly introduces water into the header through the water inlet, distributes the water flow to different branch pipes through the header, and sprays water using different nozzles on the branch pipes.

[0013] Preferably, the distances between the branch pipes on the same header are the same, and the nozzles provided on the same branch pipe are the same in size and are at equal distances.

[0014] Specifically, the distance between the branch pipes and the distance between the nozzles are set to the same spacing, which can ensure uniform water spraying and cover the entire heat exchange area inside the box; nozzles of the same size are set on the same header, and nozzles of different sizes are set on adjacent headers to achieve optimal spray intensity and uniformity.

[0015] Preferably, the large nozzle includes a large nozzle and a large joint, the small nozzle includes a small nozzle and a small joint, the large joint and the small joint are respectively connected to the branch pipe, and the large nozzle is connected to the large joint, and the small nozzle is connected to the small joint respectively.

[0016] Specifically, the large nozzle and the small nozzle are both detachable, and the flow rate and intensity of the water sprayed by the large nozzle and the small nozzle are different, and they are arranged at intervals, which can improve the cleaning effect.

[0017] Preferably, the large nozzle and the small nozzle are both rotatable nozzles.

[0018] Specifically, the rotatable nozzles used in the large nozzle and the small nozzle can be the common stainless steel industrial cleaning spray nozzles on the market, which can automatically rotate 360 degrees and spray water with high pressure, maximizing the spray range while achieving a uniform spray effect.

[0019] Preferably, two left and right spray devices are provided in the box, and the two spray devices are symmetrical to each other.

[0020] Specifically, two symmetrical spraying devices are more reasonable and ensure the same spraying effect on the left and right sides. The simple design can improve the efficiency of the spraying.

[0021] Preferably, the lower end of the hot air outlet is connected to a water collecting tank.

[0022] Specifically, the water after spray cleaning flows out from the hot air outlet and falls into the water collection tank, and the water after cleaning is recovered and processed.

[0023] Preferably, the hot air inlet, hot air outlet and cold air outlet are all trumpet-shaped and open toward the box body.

[0024] Specifically, the trumpet-shaped inlet and outlet design, combined with the horizontal flow of cold air and the vertical flow of hot air, can improve the overall heat exchange effect.

[0025] Preferably, at least two support rods are provided in the middle of the box body, and the support rods are symmetrically arranged in the middle of the box body, and the support rods are parallel to the partition.

[0026] Specifically, the support rods are mainly used to support the entire box body. Since a water collecting trough is provided below, the box body can be suspended in the air.

[0027] Preferably, an inspection port is also provided on the outside of the box.

[0028] Specifically, the inspection port is mainly used to check the internal conditions of the equipment and perform maintenance and repairs.

[0029] Compared with the prior art, the present invention achieves the following beneficial effects:

[0030] The utility model provides an air-to-air energy-saving heat exchanger suitable for treating waste gas from drying laundry detergent, comprising a box body and a partition arranged inside the box body, the box body being respectively provided with a hot air inlet and an outlet, and a cold air inlet and an outlet; a spray device is arranged between the partition and the hot air inlet; the partition is sprayed when the high-temperature gas and the low-temperature gas are exchanging heat; in the process of treating the waste gas generated in the drying process of laundry detergent, the traditional air-to-air heat exchanger is easily blocked, and the particulate matter in the waste gas enters the circulation pool, causing blockage and affecting the circulation cooling; the spray device on the top not only makes the exhaust gas flow from top to bottom, which is conducive to drainage, but also can clean the partition to prevent dust accumulation, and at the same time has the effect of circulation cooling; in addition, the air-to-air energy-saving heat exchanger also realizes the function of energy-saving recovery, and uses cold air heat exchange to recover part of the heat, which can be used in the rotary kiln at the front end, thereby reducing the consumption of natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a product schematic diagram of an air-to-air energy-saving heat exchanger suitable for treating waste gas from washing powder drying according to an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the internal structure of an air-to-air energy-saving heat exchanger suitable for treating waste gas from washing powder drying according to an embodiment of the present invention;

[0033] Figure 3 This is a structural schematic diagram of a spray device of an air-to-air energy-saving heat exchanger suitable for treating exhaust gas from washing powder drying according to an embodiment of the present invention;

[0034] Figure 4 This is the second structural schematic diagram of a spray device of an air-to-air energy-saving heat exchanger suitable for treating waste gas from washing powder drying in an embodiment of the present utility model.

[0035] Reference numerals:

[0036] 1. Box body; 11. Support rod; 12. Inspection port; 13. Partition; 14. Water collection tank;

[0037] 2. Spraying device; 21. Collecting pipe; 22. Branch pipe; 23. Large sprinkler head; 231. Large interface; 232. Large nozzle; 24. Small sprinkler head; 241. Small interface; 242. Small nozzle; 25. Water inlet. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example

[0040] like Figures 1 to 4 An air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas comprises a housing 1 and a plurality of partitions 13 arranged in the housing 1. A hot air inlet is provided at the upper portion of the housing 1, and a hot air outlet is provided at the lower portion of the housing 1; a longitudinal hot air channel is formed between the hot air inlet and the hot air outlet; a cold air inlet is provided on one side of the housing 1, and a cold air outlet opposite to the cold air inlet is provided on the other side; a transverse cold air channel is formed between the cold air inlet and the cold air outlet;

[0041] The partitions 13 are arranged parallel to each other inside the box body 1. The partitions 13 are parallel to the axis of the hot air channel, and the partitions 13 are parallel to the axis of the cold air channel. High-temperature gas enters the box body 1 through the hot air inlet, and low-temperature gas enters the box body 1 through the cold air inlet. After the high-temperature gas and the low-temperature gas meet and exchange heat between the partitions 13 inside the box body 1, they flow out through the hot air outlet and the cold air outlet respectively.

[0042] A plurality of spray devices 2 are provided above the partition 13, and the spray devices 2 include a header 21 and a plurality of branch pipes 22 connected to the header 21. The branch pipes 22 are parallel to each other, and the axis of the branch pipes 22 is perpendicular to the partition 13. The branch pipes 22 are provided with a plurality of nozzles, and the nozzles include large nozzles 23 and small nozzles 24. The nozzles provided on two adjacent branch pipes 22 are of different sizes; the spray device 2 is interconnected with an external water source through the header 21, and water flows to each branch pipe 22 through the header 21, and is sprayed toward the partition 13 by the large nozzles 23 and / or small nozzles 24 on each branch pipe 22.

[0043] The partition plate 13 is a heat exchange plate.

[0044] The gas temperature at the hot air inlet is about 80 degrees, and the temperature at the cold air inlet is about 20 degrees. After heat exchange, the gas temperature at the hot air outlet is about 62 degrees, and the temperature at the cold air outlet is about 55 degrees.

[0045] The box body 1 is provided with two left and right spraying devices 2 , and the two spraying devices 2 are symmetrical to each other.

[0046] The two mutually symmetrical spraying devices 2 are more reasonable and ensure the same spraying effect on the left and right sides. The simple design can improve the efficiency of the spraying.

[0047] The header 21 is provided with a water inlet 25 , which is located outside the box 1 . Water is introduced into the header 21 through the water inlet 25 and flows into the branch pipes 22 .

[0048] The spraying device 2 mainly introduces water into the header 21 through the water inlet 25, distributes the water flow to different branch pipes 22 through the header 21, and uses different nozzles on the branch pipes 22 to spray water.

[0049] The distances between the branch pipes 22 on the same header 21 are the same, and the nozzles provided on the same branch pipe 22 are the same in size and are at equal distances from each other.

[0050] The distances between the branch pipes 22 and the distances between the nozzles are set to the same spacing, which can ensure uniform water spraying and cover the entire heat exchange area inside the box 1; nozzles of the same size are set on the same header 21, and nozzles of different sizes are set on adjacent headers 21 to achieve the best intensity and uniformity of the spraying.

[0051] The large nozzle 23 includes a large nozzle 232 and a large joint, and the small nozzle 24 includes a small nozzle 242 and a small joint. The large joint and the small joint are respectively connected to the branch pipe 22. The large nozzle 232 and the large joint, and the small nozzle 242 and the small joint are respectively matched and connected.

[0052] The large nozzle 232 and the small nozzle 242 are both detachable. The large nozzle 232 and the small nozzle 242 have different flow rates and intensities when spraying water, and are arranged at intervals, which can improve the cleaning effect.

[0053] Both the large nozzle 23 and the small nozzle 24 are rotatable nozzles.

[0054] The rotatable nozzles used in the large and small nozzles can be the common stainless steel industrial cleaning spray nozzles on the market. They can automatically rotate 360 degrees and spray water with high pressure, maximizing the spray range while achieving a uniform spray effect.

[0055] The lower end of the hot air outlet is connected to a water collecting tank 14.

[0056] The water after spray cleaning flows out from the hot air outlet and falls into the water collecting tank 14, and the water after cleaning is recovered.

[0057] The hot air inlet, hot air outlet and cold air outlet are all trumpet-shaped and open toward the box body 1 .

[0058] The trumpet-shaped inlet and outlet design, combined with the horizontal flow of cold air and the vertical flow of hot air, can improve the overall heat exchange effect.

[0059] At least two support rods 11 are provided in the middle of the box body 1 . The support rods 11 are symmetrically arranged in the middle of the box body 1 . The support rods 11 are parallel to the partition 13 .

[0060] The support rod 11 is mainly used to support the entire box body 1. Since a water collecting tank 14 is provided below, the box body 1 can be suspended in the air.

[0061] An inspection port 12 is also provided on the outside of the box body 1 .

[0062] The inspection port 12 is mainly used to check the internal conditions of the equipment and perform maintenance and repairs.

[0063] The utility model provides an air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas. By arranging a spray device 2 in a box body 1 and arranging rotatable nozzles of different sizes, the partition 13 is sprayed and cleaned when the high-temperature gas and the low-temperature gas are exchanging heat, thereby preventing dust accumulation and promoting the circulation cooling effect.

[0064] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation to the present invention.

Claims

1. An air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas, comprising a housing and a plurality of partitions disposed within the housing, wherein the upper portion of the housing is provided with a hot air inlet, and the lower portion of the housing is provided with a hot air outlet; a longitudinal hot air channel is formed between the hot air inlet and the hot air outlet; a cold air inlet is provided on one side of the housing, and a cold air outlet opposite to the cold air inlet is provided on the other side of the housing; a transverse cold air channel is formed between the cold air inlet and the cold air outlet; and the characteristics are: The partitions are arranged parallel to each other inside the box, and the axes of the partitions and the hot air channel are parallel to each other, and the axes of the partitions and the cold air channel are parallel to each other; high-temperature gas enters the box through the hot air inlet, and low-temperature gas enters the box through the cold air inlet. After the high-temperature gas and the low-temperature gas meet and exchange heat between the partitions inside the box, they flow out through the hot air outlet and the cold air outlet respectively; A plurality of spray devices are provided above the partition, and the spray devices include a header and a plurality of branch pipes connected to the header, the branch pipes are parallel to each other, and the axis of the branch pipe is perpendicular to the partition, and a plurality of nozzles are provided on the branch pipe, and the nozzles include large nozzles and small nozzles, and the nozzles provided on two adjacent branch pipes are of different sizes; the spray device is interconnected with an external water source through the header, and water flows to each branch pipe through the header, and is sprayed toward the partition by the large nozzles and / or small nozzles on each branch pipe.

2. The air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas according to claim 1, characterized in that: The collecting pipe is provided with a water inlet, which is located outside the box body. Water is introduced into the collecting pipe through the water inlet and flows into the branch pipes respectively.

3. The air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas according to claim 1, characterized in that: The distances between the branch pipes on the same header are the same, and the nozzles arranged on the same branch pipe are the same in size and at equal distances.

4. The air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas according to claim 1, characterized in that: The large nozzle includes a large nozzle and a large joint, and the small nozzle includes a small nozzle and a small joint. The large joint and the small joint are respectively connected to the branch pipe. The large nozzle is connected to the large joint, and the small nozzle is connected to the small joint.

5. The air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas according to claim 4, characterized in that: The large nozzle and the small nozzle are both rotatable nozzles.

6. The air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas according to claim 1, characterized in that: The box body is provided with two left and right spraying devices, and the two spraying devices are symmetrical to each other.

7. The air-to-air energy-saving heat exchanger suitable for treating laundry powder drying waste gas according to claim 1, characterized in that: The lower end of the hot air outlet is connected to a water collecting tank.

8. The air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas according to claim 1, characterized in that: The hot air inlet, hot air outlet and cold air outlet are all trumpet-shaped and open toward the box body.

9. The air-to-air energy-saving heat exchanger suitable for treating laundry powder drying waste gas according to claim 1, characterized in that: At least two support rods are provided in the middle of the box body. The support rods are symmetrically arranged in the middle of the box body, and the support rods are parallel to the partition board.

10. The air-to-air energy-saving heat exchanger suitable for treating laundry detergent drying waste gas according to claim 1, characterized in that: An inspection port is also provided on the outside of the box body.

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