Boiler body structure
The boiler body structure, designed with multi-stage flues and buffer chambers, solves the problem of insufficient heat absorption from flue gas and fire in existing boilers without increasing their volume, thereby improving heat utilization and facilitating cleaning and maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-17
- Publication Date
- 2026-03-31
AI Technical Summary
The existing boiler's single-channel S-shaped flue design results in insufficient heat absorption from the flue and fire in small boilers without increasing their size, leading to energy loss.
It adopts a multi-stage flue structure, including a primary flue, a first buffer chamber, a secondary flue, a second buffer chamber, and a U-shaped tertiary flue. The buffer chamber design increases the residence time of smoke and fire and heat absorption, and it is equipped with multiple ash removal ports for easy cleaning and maintenance.
It improves the utilization rate of smoke and heat, maintains the compact structure of the furnace body without increasing its volume, and achieves efficient cleaning through the ash removal port design, thereby improving thermal efficiency.
Smart Images
Figure CN224065511U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler structure technology, specifically a boiler body structure. Background Technology
[0002] The existing boiler internal flue design is mostly a single-channel S-shaped design, which allows for smooth smoke and fire flow. However, this can lead to some energy loss in small boilers. The boiler industry has always been pursuing a technological achievement that can absorb as much heat from the smoke and fire as possible without increasing the boiler size. Utility Model Content
[0003] To address the shortcomings of the existing technology, this utility model provides a boiler body structure that absorbs as much heat from flue gas as possible and improves thermal efficiency without changing the boiler volume.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A boiler body structure includes an outer shell, a furnace, a flue gas passage, and a water jacket. The flue gas passage includes a primary flue, a first buffer chamber, a secondary flue, and a second buffer chamber that are connected sequentially upwards from the furnace, as well as a U-shaped tertiary flue located at the rear of the boiler body. The upper inlet of the tertiary flue is connected to the end of the second buffer chamber, and the upper outlet of the tertiary flue is a flue gas outlet.
[0006] Furthermore, the primary flue includes several independent flue I.
[0007] Furthermore, the flue I is a flat, square pipe.
[0008] Furthermore, the secondary flue includes a flue II disposed at the edge of the first buffer chamber.
[0009] Furthermore, the flue II is a circular pipe.
[0010] Furthermore, a dust removal port communicating with the outside is provided on one side of the first buffer chamber and the second buffer chamber.
[0011] Furthermore, cleaning ports are provided at the bottom and top inlets of the three-stage flue.
[0012] Furthermore, a pusher port and a blower port are provided on one side of the furnace.
[0013] Furthermore, tie rods connected to the outer shell are provided on the sides of the furnace and the first buffer chamber.
[0014] The beneficial effects of this utility model are:
[0015] It will greatly improve the utilization rate of fire heat through a three-stage flue and a buffer chamber, and the furnace body has a compact structure that will not increase the volume. The design of multiple ash removal ports makes ash removal convenient and efficient. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the internal structure of the present invention;
[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0018] Figure 3 This is a side view of the internal structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the overall structure of this utility model;
[0020] In the diagram, the components are: outer shell 1, water inlet 101, furnace chamber 2, material pusher 201, fan inlet 202, smoke and fire passage 3, primary flue 301, flue I 3011, first buffer chamber 302, ash removal port I (3021, 3041), secondary flue 303, second buffer chamber 304, tertiary flue 305, ash removal port III 3051, ash removal port IV 3052, exhaust port 306, water jacket 4, and tie rod 5. Detailed Implementation
[0021] To better understand this utility model, the following description is in conjunction with the appendix. Figure 1-4 The embodiments of this utility model will be explained in detail below.
[0022] The boiler body structure of this utility model includes an outer shell 1, a furnace chamber 2, a flue gas passage 3, and a water jacket 4. It should be noted that structural components not described below are common knowledge to those skilled in the art and therefore not explained in detail. For example, a pusher port 201 and a blower port 202 are provided on one side of the furnace chamber 2, but the pusher mechanism and blower are not described. Similarly, the furnace door of the furnace chamber 2, and the water inlet 101, water outlet, and explosion-proof valve on the outer shell 1 are all conventional structures. The flue gas passage 3 includes a primary flue 301, a first buffer chamber 302, a secondary flue 303, and a second buffer chamber 304 connected sequentially upwards from the furnace chamber 2, and a tertiary flue 305 located at the rear of the boiler body. The tertiary flue 305 has a U-shaped structure. The upper inlet of the tertiary flue 305 connects to the end of the second buffer chamber 304, and the upper outlet of the tertiary flue 305 is a flue gas outlet 306. It should be noted that, for clarity of view, Figure 1 and Figure 2 The upper sealing plate of the second buffer chamber 304 is not shown.
[0023] The primary flue 301 includes several independent flue I 3011, such as Figure 2Alternatively, as shown in Figure 3, there are four flues I 3011 evenly distributed at the top of the furnace 2. The structure of flue I 3011 is preferably a flat square pipe. This structural design ensures the rapid discharge of smoke and fire from the furnace and maximizes the heat absorption of the surrounding water jacket. The secondary flue 303 includes a flue II set at the right rear edge of the first buffer chamber 302. The flue II is preferably a circular pipe. This design ensures that the smoke and fire fully fill the first buffer chamber 302 before entering the second buffer chamber 304 through flue II, increasing the residence time of the smoke and fire and improving the heat absorption rate.
[0024] For ease of maintenance and cleaning, a cleaning port I (3021, 3041) communicating with the outside is provided on one side of the first buffer chamber 302 and the second buffer chamber 304. The cleaning port I is preferably a rectangular opening and equipped with a door. For clarity, the door mechanism is not shown in the figure. Similarly, a cleaning port III 3051 is provided at the bottom of the tertiary flue 305, and a cleaning port IV 3052 is provided at the upper inlet.
[0025] To improve structural stability and prevent furnace body expansion, tie rods 5 connected to the outer shell 1 are provided on the sides of the furnace chamber 2 and the first buffer chamber 302. The tie rods 5 are preferably circular tube structures as shown in the figure.
[0026] The smoke and fire trajectory of this utility model is as follows: the smoke and fire in the furnace 2 enter the first buffer chamber 302 from multiple flues I 3011 of the primary flue 301. The first buffer chamber 302 is a flat chamber. Then, it enters the second buffer chamber 304 through a secondary flue 303 at the right rear end of the first buffer chamber 302. Then, it enters the tertiary flue 305 from the left front end of the second buffer chamber 304. After moving downward along the tertiary flue 305, it is discharged upward from the exhaust port 306.
[0027] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A boiler furnace structure comprising an outer shell, a furnace, a flue gas pass and a water jacket, characterized in that: The smoke passage comprises a first-stage flue, a first buffer chamber, a second-stage flue, a second buffer chamber and a U-shaped third-stage flue arranged at the back of the furnace body in sequence from the hearth upward, the upper end inlet of the third-stage flue is communicated with the end of the second buffer chamber, and the upper end outlet of the third-stage flue is the smoke outlet.
2. A boiler furnace structure as claimed in claim 1, characterized in that: The first-stage flue comprises several independent flues I.
3. A boiler furnace structure as claimed in claim 2, c h a r a c t e r i s e d in that: The flue I is a flat square pipeline.
4. A boiler furnace structure as claimed in claim 1, wherein: The second-stage flue comprises a flue II arranged at the edge of the first buffer chamber.
5. A boiler furnace structure as claimed in claim 4, c h a r a c t e r i s e d in that: The flue II is a circular pipeline.
6. A boiler furnace structure as claimed in claim 1, wherein: A dust cleaning port communicated with the outside is arranged at one side of the first buffer chamber and the second buffer chamber.
7. A boiler furnace structure as claimed in claim 1, wherein: Dust cleaning ports are arranged at the bottom and the upper end inlet of the third-stage flue.
8. A boiler furnace structure as claimed in claim 1, wherein: A pushing port and a fan port are arranged at one side of the hearth.
9. A boiler furnace structure as claimed in claim 1, wherein: Pulling ribs connected with the shell are arranged at the side of the hearth and the first buffer chamber.