A steam cylinder dryer

Abstract

The utility model discloses a steam drying cylinder drying machine, including the multiple rows drying cylinder of staggered setting, its characterized in that: drying cylinder sets up in the closed box, every drying cylinder input end connects high pressure steam, and the output end is connected after the drainage of drain valve outlet confluence and inserts the flash tank, the top steam pipe of flash tank is connected after steam injection valve, and the input end of at least with one drying cylinder is connected. The utility model discloses closed box, prevents heat loss, saves energy source, and also is convenient for realizing the control of humidity in the box. Through the reutilization of condensate heat of flash tank, improve the utilization of steam, and great saving heat energy resources. Simultaneously, the drying cylinder drive mechanism of independent setting can set the speed difference according to the shrinkage of fabric, and the tendency of wrinkle caused by stress change in the fabric drying process is relieved.

Description

Technical Field

[0001] This utility model belongs to the field of printing and dyeing equipment technology, and in particular relates to a steam drying cylinder dryer. Background Technology

[0002] In the continuous production process of printing and dyeing, steam drum dryers are responsible for drying fabrics with a moisture content (roll-in yield) of 60-70% to approximately 10%. Traditional dryers employ an open structure, with multiple drums mounted on front and rear columns within a frame. A steam collection hood is installed above the frame, and each drum has an exhaust fan to discharge the hot, humid air from the hood along the duct. Due to the open frame, the ambient temperature of the steam drums is close to room temperature, resulting in some energy loss due to the ambient temperature. Furthermore, some of the high-temperature, high-pressure steam condenses into water after passing through the drums and is directly discharged. This condensate, being at a high temperature, contains a significant amount of heat that cannot be recovered, leading to further energy waste. Additionally, because multiple drums are driven by a single transmission device, there is no speed gradient between adjacent drums, which can easily cause wrinkling when processing certain tension-sensitive fabrics. Summary of the Invention

[0003] The purpose of this invention is to provide a closed-loop steam drum dryer that can fully utilize heat energy, reduce heat loss, and ensure the moisture content of the dried fabric, addressing the shortcomings of existing drum dryers.

[0004] To achieve the above objectives, this utility model adopts the following technical solution:

[0005] A steam-cooled drum dryer includes multiple rows of staggered drying drums. The drums are housed within a sealed chamber. Each drum's input end is connected to high-pressure steam, and its output end, after passing through a steam trap, is connected to a flash tank. The top steam pipe of the flash tank is connected to a steam injection valve and then to the input end of at least one drying drum. The sealed chamber prevents heat loss, saves energy, and facilitates humidity control within the chamber. After the high-temperature, high-pressure steam passes through the drying drums for heat exchange, the condensate discharged through the steam trap still retains a high temperature and contains a large amount of heat. Upon entering the flash tank, the sudden pressure drop causes the condensate to continue boiling, generating saturated steam. This saturated steam, after being excited by high-pressure steam, is then connected to at least one drying drum, enabling the reuse of the condensate's heat, improving steam utilization, and significantly saving thermal energy resources.

[0006] A further feature is that: multiple drying cylinders are arranged in groups of 8-12 per column, with the front and rear drying cylinders set in a sealed chamber isolated from each other in the box body, so that the humidity of the hot and humid air in each chamber can be set independently, thereby reducing the emission of hot air and reducing the steam consumption of the steam drying cylinder.

[0007] Furthermore, the drain outlet of each of the drying cylinders is connected to a flash tank.

[0008] Preferably, the top steam pipe of the flash tank is connected to a steam injection valve and then connected to the input end of the last two drying cylinders of each column to realize the reuse of condensate heat energy.

[0009] Preferably, each sealed chamber is equipped with a gas collection hood at the top, which is connected to an independent variable speed exhaust fan. A hot air humidity sensor is installed in the exhaust channel, which can realize independent control of the humidity of the independent chamber to adapt to different humidity requirements of the fabric.

[0010] Preferably, each of the drying cylinders is equipped with an independent drive motor and drive device, and the speed difference between adjacent drying cylinders can be set so that the fabric can be set with a gradual gradient according to the warp shrinkage during the drying process, thereby alleviating the tendency of wrinkling caused by stress changes during the drying process.

[0011] Preferably, the dryer is equipped with a fabric humidity sensor at the fabric outlet to stabilize the moisture content of the fabric and save steam consumption.

[0012] Preferably, the flash tank is equipped with high and low level switches, and its bottom is connected to a condensate tank via a drain valve; the drain valve is controlled by the high and low level switches. When the liquid level is higher than the high level switch, the drain valve opens to discharge condensate until the liquid level triggers the low level switch, at which point the drain valve closes; thus ensuring the liquid level in the flash tank.

[0013] This invention employs a sealed chamber to prevent heat loss, saving energy and facilitating humidity control within the chamber. The flash evaporator reuses the heat from the condensate, improving steam utilization and significantly conserving thermal energy. Simultaneously, the independently designed drying cylinder drive mechanism allows for speed adjustments based on fabric shrinkage, mitigating the tendency for wrinkling caused by stress changes during the drying process. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the structure of this utility model.

[0015] Figure 2 is a schematic diagram of the steam circuit of this utility model. Detailed Implementation

[0016] like Figure 1 , 2As shown, a steam-cooled drum dryer 1 includes two rows of staggered drying drums 3. The drying drums 3 are arranged in groups of 8-12 per column, and the two columns of drying drums 3 are housed in sealed chambers isolated from each other in a housing 2. The input end of each drying drum 3 is connected to a high-pressure steam source 21, and the high-pressure steam enters the drying drum 3 after passing through a steam regulating valve 22. The output end is connected to a flash tank 41 after passing through a drain outlet 23. The top steam pipe of the flash tank 41 is connected to a steam injection valve 24 and then to the input end of the last two drying drums 3 in each column. The flash tank 41 is equipped with a high-level switch 42 and a low-level switch 43, and the bottom is connected to a condensate tank 45 through a drain valve 44. The drain valve 44 is controlled to open and close by the high-level switch 42 and the low-level switch 43. When the liquid level is higher than the high-level switch 42, the drain valve 44 opens to discharge condensate until the liquid level triggers the low-level switch 43, at which point the drain valve 44 closes; thus ensuring the liquid level in the flash tank 41.

[0017] Each sealed chamber is equipped with a gas collection hood 4 at the top, which is connected to an independent variable speed exhaust fan 6. A hot air humidity sensor 5 is installed in the exhaust channel, which can realize independent control of the humidity of the independent chamber to adapt to the different humidity requirements of the fabric 7.

[0018] Each drying cylinder 3 is equipped with an independent drive motor 31 and drive device, which can set the speed difference between adjacent drying cylinders 3, so that the fabric 7 can be set according to the warp shrinkage amount during the drying process, thereby alleviating the tendency of wrinkling caused by stress changes during the drying process.

[0019] The dryer 1 is equipped with a fabric humidity sensor 8 at the fabric outlet to stabilize the moisture content of the fabric and save steam consumption.

[0020] This invention employs a sealed chamber to prevent heat loss, saving energy and facilitating humidity control within the chamber. The flash evaporator reuses the heat from the condensate, improving steam utilization and significantly conserving thermal energy. Simultaneously, the independently designed drying cylinder drive mechanism allows for speed adjustments based on fabric shrinkage, mitigating the tendency for wrinkling caused by stress changes during the drying process.

Claims

1. A steam cylinder dryer comprising a plurality of rows of cylinders arranged in a staggered formation, characterised in that: The drying cylinders are housed in a sealed chamber. Each drying cylinder has a high-pressure steam input and an output that is connected to a flash tank after passing through a steam trap outlet. The top steam pipe of the flash tank is connected to a steam injection valve and is then connected to the input of at least one drying cylinder.

2. The steam barrel dryer as claimed in claim 1, wherein: The multiple drying cylinders are arranged in groups of 8-12 per column, with the front and rear drying cylinders set in a sealed chamber that is isolated from each other in the box body.

3. The steam barrel dryer as claimed in claim 2, wherein: The drain outlet of each drying cylinder is connected to one of the flash tanks.

4. The steam drum dryer as described in claim 2 or 3, characterized in that: The top steam pipe of the flash tank is connected to the steam injection valve and then connected to the input end of the last two drying cylinders of each column.

5. The steam drying drum dryer as described in claim 2 or 3, characterized in that: Each sealed chamber is equipped with a gas collection hood at the top, which is connected to an independent variable speed exhaust fan. A hot air humidity sensor is installed in the exhaust channel.

6. The steam drum dryer as described in any one of claims 1-3, characterized in that: Each of the drying cylinders is equipped with an independent drive motor and drive device.

7. The steam drum dryer as described in any one of claims 1-3, characterized in that: The dryer is equipped with a fabric humidity sensor at the fabric outlet.

8. The steam drum dryer as described in any one of claims 1-3, characterized in that: The flash tank is equipped with high and low liquid level switches, and the bottom is connected to the condensate tank through a drain valve; the drain valve is controlled to open and close by the high and low liquid level switches.

Images