A grate device capable of realizing sectional regulation and independent air distribution
By setting up independent ash hoppers and gradually narrowing air boxes under each single-span grate, combined with electric air regulating baffles, the problem of uneven air supply in traditional grates is solved, and the grate device is able to be adjusted in sections and distributed independently, thereby improving combustion efficiency and wind speed uniformity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN HUIYING MACHINERY
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-05
AI Technical Summary
The traditional multi-span grate structure suffers from uneven air supply, resulting in a slower air supply speed in the side grate, which affects the complete combustion of fuel.
Design a grate device in which an independent ash hopper is set under each single-span grate and connected to the air inlet channel through a tapered bellows. Equipped with an electric air regulating damper, it ensures that each ash hopper is supplied with air independently. The structure of the tapered bellows accelerates the uniformity of airflow.
It achieves full combustion in each grate stage, avoids uneven air supply, improves combustion efficiency and air velocity uniformity, and has a simple structure and low cost.
Smart Images
Figure CN224327196U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to grate structures, and in particular to a grate device that can achieve segmented adjustment and independent air distribution. Background Technology
[0002] When incinerating combustibles such as garbage, incineration equipment with an internal grate structure is required, namely a grate device. The reciprocating grate is the core component of the incineration equipment. It is mainly used to support fuel (such as solid waste, biomass, etc.) and achieve efficient and complete combustion of fuel by controlling air flow, fuel movement and combustion rate.
[0003] In traditional multi-span grate structures, the same step of the multi-span grate shares the same air chamber. Air inlet pipes are installed on both sides of the ash hopper to provide fresh air to the grate above the ash hopper.
[0004] While this structure can save costs, it has certain limitations. Since the airflow speed is faster further away from the air inlet, if the above structure is still used when there are many grate spans, uneven air supply will occur. Taking a three-span grate as an example, if the air supply speed of the middle grate is normal, the air supply speed of the side grate spans will be relatively slower, resulting in uneven air supply speeds across the grate spans.
[0005] Therefore, a method or apparatus is needed to solve the above problems. Summary of the Invention
[0006] This invention addresses the aforementioned shortcomings of existing technologies by proposing a grate device that is simple in structure, ingenious in design, and rational in layout, ensuring complete combustion in all grate sections and enabling segmented adjustment and independent air distribution.
[0007] The technical solution of this utility model is: a grate device that can realize segmented adjustment and independent air distribution, characterized in that: the grate device includes at least three single-span grates 1, with intermediate wall plates 2 arranged between adjacent single-span grates 1, and each single-span grate 1 is provided with at least n stepped grate frames 3, where n≥2, and simultaneously, n ash hoppers 4 corresponding one-to-one with the steps of the grate frames 3 are arranged below the single-span grate 1.
[0008] In the same single-span grate 1, all ash hoppers 4 are connected to the same converging air box 6 through an air inlet channel 5, and an electric air regulating baffle 11 is also provided on the air inlet channel 5. The top plate 7 of the converging air box 6 is inclined, with the end near the air inlet 8 being relatively high, and the inclination angle of the top plate 7 is 2-5°.
[0009] The ash hopper 4 is equipped with an inspection door 9, and the bottom of the ash hopper 4 is equipped with an ash discharge port 10 with a gate.
[0010] Compared with the prior art, this utility model has the following advantages:
[0011] This type of grate device, capable of segmented adjustment and independent air distribution, is simple in structure, ingeniously designed, and rationally laid out. Addressing the problem of uneven air supply in traditional multi-span grates, it employs a unique structure. First, an independent ash hopper is installed below each grate step, and all ash hoppers are connected to the bellows via air inlet channels. Simultaneously, an electrically operated air-adjusting damper is installed on each air inlet channel. This allows for independent air supply to each ash hopper, ensuring complete combustion of fuel in each step of the multi-span grate structure. Furthermore, the bellows utilize a special tapered structure, conforming to fluid aerodynamics, ensuring consistent gas conditions at the air inlets of each ash hopper and preventing air concentration at the far end of the pipe when supplied with air from a single-diameter duct.
[0012] At the same time, this grate device has a simple manufacturing process and low manufacturing cost, so it can be said that it has many advantages and is particularly suitable for promotion and application in this field, with a very broad market prospect. Attached Figure Description
[0013] Figure 1 This is a front view of an embodiment of the present utility model.
[0014] Figure 2 This is a side view of an embodiment of the present utility model. Detailed Implementation
[0015] The specific embodiments of this utility model will be described below with reference to the accompanying drawings. Figure 1 , Figure 2 The diagram shows a grate device capable of segmented adjustment and independent air distribution. The grate device includes at least three single-span grates 1, with intermediate wall panels 2 between adjacent single-span grates 1. Each single-span grate 1 contains at least n stepped grate frames 3, where n ≥ 2. Simultaneously, n ash hoppers 4, corresponding one-to-one with the steps of the grate frames 3, are located below each single-span grate 1.
[0016] In the same single-span grate 1, all ash hoppers 4 are connected to the same converging air box 6 through an air inlet channel 5, and an electric air regulating baffle 11 is also provided on the air inlet channel 5. The top plate 7 of the converging air box 6 is inclined, with the end near the air inlet 8 being relatively high, and the inclination angle of the top plate 7 is 2-5°.
[0017] The ash hopper 4 is equipped with an inspection door 9, and the bottom of the ash hopper 4 is equipped with an ash discharge port 10 with a gate.
[0018] The working process of the grate device with segmented adjustment and independent air distribution in this embodiment of the utility model is as follows: When the grate device is working, fresh air is injected into it through the opening at the tail end of the converging air box 6 by an air pump. Since all the ash hoppers 4 in each single-span grate 1 are connected to the same converging air box 6 through an air inlet channel 5, that is, the three single-span grates 1 correspond to the three converging air boxes 6 respectively, and the 12 ash hoppers 4 in the grate device are all connected to the corresponding converging air boxes 6 through independent air inlet channels 5, the operator can control the 12 electric air regulating dampers 11 through the control system to control them to be in a fully open state when working (or in a fully closed state when not working).
[0019] Meanwhile, since the top plate of the tapered bellows 6 is inclined (with an inclination angle of 2-5°), this structure can cause the cross-sectional area of the tapered bellows 6 to gradually decrease from the bellows inlet to the far end, thus accelerating the airflow. This structure can counteract the influence of distance on wind speed and ensure that the airflow speed of all air inlet channels 5 in the same tapered bellows 6 is approximately the same.
[0020] This grate device can ensure independent air supply to each ash hopper 4, while the special structure of the progressive air box 6 ensures that the air supply volume of each ash hopper 4 is roughly the same, avoiding the phenomenon that air is concentrated at the far end of the pipe when air is supplied from the same diameter air duct.
Claims
1. A grate device capable of segmented adjustment and independent air distribution, characterized in that: The grate device includes at least three single-span grates (1), with intermediate wall panels (2) between adjacent single-span grates (1), and at least n stepped grate frames (3) are provided in each single-span grate (1), where n ≥ 2. At the same time, n ash hoppers (4) corresponding one-to-one with the steps of the grate frames (3) are provided below the single-span grate (1). In the same single-span grate (1), all the ash hoppers (4) are connected to the same converging air box (6) through an air inlet channel (5), and an electric air regulating baffle (11) is also provided on the air inlet channel (5). The top plate (7) of the converging air box (6) is inclined, and the end near the air inlet (8) is relatively high, and the inclination angle of the top plate (7) is 2-5°.
2. The grate device according to claim 1, which enables segmented adjustment and independent air distribution, is characterized in that: The ash hopper (4) is equipped with an inspection door (9), and the bottom end of the ash hopper (4) is equipped with an ash discharge port (10) with a gate.