Textile Dryer Hot Gas Ring for Uniform Air Distribution
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Solution Overview
Problem
Existing dryers for textile web materials suffer from uneven temperature distribution of drying air, leading to inefficient drying due to temperature streaks in the air flow, which can result in incomplete drying and potential damage to the material.
Innovation Solution
A hot gas feed ring is integrated around the induced draft to uniformly distribute hot gas throughout the drying air, ensuring that the air is heated consistently before it enters the drying room, with the hot gas being fed in front of the fan to mix with the drying air and then pass through it, ensuring a uniform temperature across the textile web.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heating elements are arranged in the heating and fan room, then the drying air can be heated, but the temperature distribution becomes uneven with air streaks of different temperature ranges
Solution Approach 1:
The heating function is segmented from the fan room and integrated into the drum structure itself. The drum is divided into heating zones with heating elements arranged along its length, allowing localized heating at different positions. This segmentation enables uniform temperature distribution across the drying air flow while simplifying the overall system arrangement by eliminating the separate heating and fan room.
Solution Approach 2:
The heating elements are nested within the drum structure, with heating zones integrated into the drum wall or core. This nesting approach allows the heating function to be embedded within the existing drum geometry, achieving uniform temperature distribution without requiring additional external heating rooms or complex arrangements of heating elements.
2Productivity
If drying air is circulated through the drum interior, then the textile web can be dried, but temperature streaks cause inefficient drying and potential material damage
Solution Approach 1:
Different sections of the drum are equipped with heating elements at specifically designed positions to create localized heating zones. This ensures that drying air receives uniform heat distribution as it circulates through the drum interior, eliminating temperature streaks that cause inefficient drying and potential material damage. Each local zone is optimized for uniform temperature control.
Solution Approach 2:
The heating elements are arranged to create equipotential temperature distribution throughout the drying air flow path. By positioning heating zones to ensure uniform heat addition across all air streams, the system eliminates temperature gradients and streaks, ensuring consistent drying conditions throughout the drum interior without compromising drying efficiency.
3Temperature
If heating elements are arranged in the heating and drying room, then heat input is provided, but the drying air enters the drying room with non-uniform temperature over the entire width
Solution Approach 1:
The heating function is segmented into multiple zones along the drum length, with heating elements positioned to correspond with different sections of the textile web width. This segmentation ensures that drying air is heated uniformly across all width positions as it circulates, eliminating temperature variations across the web while simplifying the drying room design by removing the need for separate heating and drying chambers.
Solution Approach 2:
The heating function is extracted from the drying room and integrated into the drum structure. This extraction eliminates the need for complex heating and drying room arrangements, as the drum itself becomes the heating chamber. The drying air is heated uniformly within the drum and then distributed evenly across the drying room, simplifying the overall manufacturing design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures that the textile web is exposed to drying air of a consistent temperature over its entire width, improving the efficiency and uniformity of the drying process, thereby enhancing the quality of the dried material.
Implementation Method 1
A fan (12) is provided with which a suction draft (14) from the inside of the drum (11) can be formed and circulation of the drying air (15) back into the drying chamber (10) can be achieved
Implementation Method 2
heated gas being able to be supplied to the circulating drying air (15) by means of a hot gas source (16)
Implementation Method 3
the hot gas is mixed with the drying air sucked out of the inside of the drum, with the mixing being able to be used particularly effectively by the passage of the mixed drying air with the hot gas through the fan (12)
Implementation Method 4
the airflow from the drying air flowing out radially or tangentially from the fan flows around them
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention relates to a dryer (100) for a textile web (1) with a drying chamber (10) in which at least one air-permeable drum (11) is rotatably arranged, which can be partially enclosed by the web (1) and wherein the web can be permeated with heated drying air (15), and wherein a fan (12) is provided, with which an induced draft (14) can be generated from the drying air (15) from the inside of the drum (11) via a suction side (13) extending axially to the drum (11) and a circulation of the drying air (15) back into the drying chamber (10), and wherein heated gas can be supplied to the circulating drying air (15) by means of a hot gas source (16). According to the invention, at least one hot gas supply ring (17) is provided, which surrounds the induced draft (14) and through which the hot gas can flow substantially completely into the induced draft (14).