Anti-icing structure of waste heat boiler chimney outlet
By designing a metal reinforcement ring with an annular cavity at the outlet of the waste heat boiler, and using flue gas to heat the condensate in the annular cavity, the safety risks formed by ice hanging at the chimney outlet are solved, and an economical and environmentally friendly anti-icing effect is achieved.
Patent Information
- Application Number
- CN202510170523.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-04-04
AI Technical Summary
The outlet of waste heat boiler chimney is prone to ice hangings in cold areas, resulting in safety risks.
A metal reinforcement ring is designed to surround the chimney outlet and form an annular cavity inside, which is connected to the inside of the chimney through the smoke inlet hole and the smoke guide hole. The metal reinforcement ring is heated with flue gas to prevent condensate from freezing.
It effectively avoids the formation of ice hanging at the chimney outlet, ensures safety, and achieves economic and environmentally friendly anti-icing effects by utilizing the waste heat of flue gas.
Smart Images
Figure CN119755656A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a waste heat boiler chimney, in particular to an anti-icing structure at a waste heat boiler chimney outlet, belonging to the technical field of boiler equipment. Background Art
[0002] The steel chimney of the waste heat boiler has a large diameter, and the steel plate of the chimney outlet is usually thin, so a metal reinforcement ring is usually set at the chimney outlet. The existing metal reinforcement ring is generally made of bent steel (such as angle steel and channel steel). In cold areas where the ambient temperature is below zero in winter, the condensed water generated by the condensation of flue gas at the chimney outlet is easy to freeze at the far end of the metal reinforcement ring to form icicles. The icicles break and fall to the ground platform, which will cause harm to personnel and equipment around the chimney. Summary of the invention
[0003] The present invention mainly solves the technical problem in the prior art that ice hanging at the chimney outlet brings safety risks to personnel and equipment around the chimney, and provides an anti-icing structure for the chimney outlet of a waste heat boiler.
[0004] The present invention solves the above-mentioned technical problems mainly through the following technical solutions: the present invention includes a chimney, a metal reinforcement ring clamped on the outer wall of the chimney outlet, characterized in that the metal reinforcement ring is hollow inside and forms an annular cavity surrounding the chimney outlet, the inner wall of the metal reinforcement ring that is in contact with the outer wall of the chimney is provided with a smoke inlet hole and the top wall is provided with a smoke outlet hole, the smoke inlet hole and the smoke outlet hole are connected with the annular cavity, and also includes a smoke guide hole arranged on the inner wall of the chimney corresponding to the position of the smoke inlet hole, and the smoke guide hole is connected with the smoke inlet hole.
[0005] Preferably, the top wall surface of the metal reinforcement ring is a slope that is higher on the outside and lower on the inside, and the slope is located higher than the chimney outlet.
[0006] Preferably, the smoke outlet holes are evenly distributed along the circumference of the top wall of the metal reinforcement ring.
[0007] Preferably, the cross-section of the metal reinforcement ring is a hollow rhombus.
[0008] Preferably, the smoke inlet hole is located at the bottom of the annular cavity.
[0009] Preferably, the metal reinforcement ring is formed by splicing together a plurality of pipe sections which are bent from diamond-shaped steel pipes and match the outer circumference of the chimney.
[0010] Preferably, the chimney further comprises a guide plate disposed on the inner wall of the chimney near the upper edge of the smoke guide hole, wherein the guide plate extends from the inner wall of the chimney toward the center of the chimney and tilts toward one side toward the smoke.
[0011] The present invention has a simple structure, reasonable design, and has the following advantages: In the present invention, a metal reinforcement ring surrounds the chimney outlet, and an annular cavity is arranged inside the metal reinforcement ring, and the annular cavity is connected to the inside of the chimney through a smoke inlet hole and a smoke guide hole. When the smoke in the chimney passes through the smoke guide hole, part of the smoke can enter the annular cavity through the smoke inlet hole to heat the metal reinforcement ring, so that the temperature of the outer wall of the metal reinforcement ring is increased, thereby preventing the condensed water of the smoke from freezing at the far end of the metal reinforcement ring. A smoke outlet hole is arranged on the top wall of the metal reinforcement ring, and the smoke in the annular cavity is discharged through the smoke outlet hole after heat exchange and temperature reduction, so that the smoke in the chimney continuously flows into the annular cavity, so that the metal reinforcement ring maintains a high temperature, thereby sustainably preventing the far end of the metal reinforcement ring from freezing.
[0012] Furthermore, the top wall of the metal reinforcement ring is high on the outside and low on the inside, and the flue gas condensate flows along the slope into the inner wall of the chimney to evaporate under the heat, thereby eliminating the condition for the flue gas condensate to form ice hanging at the chimney outlet.
[0013] Furthermore, the smoke outlet holes are evenly distributed along the circumference on the top wall of the metal reinforcement ring, which is conducive to the uniform discharge of smoke in the annular cavity, thereby keeping the smoke in the chimney continuously flowing into the annular cavity.
[0014] Furthermore, the smoke inlet hole is located at the bottom of the annular cavity, which is conducive to the smoke condensation water in the annular cavity to flow back into the chimney through the smoke inlet hole and the smoke guide hole, thereby avoiding the formation of water accumulation in the annular cavity.
[0015] Furthermore, the metal reinforcement ring is made of bent diamond-shaped steel pipes, which can be pressed from square pipes. The materials are easy to obtain and inexpensive, which helps save raw material costs. The metal reinforcement ring is divided into several pipe sections for production and then spliced on site, which facilitates the production and transportation of the metal reinforcement ring.
[0016] Furthermore, a guide plate is arranged in the chimney, and smoke is guided into the smoke guide hole through the guide plate, which can effectively increase the smoke flow entering the annular cavity and enhance the continuous heating of the metal reinforcement ring.
[0017] Therefore, the present invention solves the technical problem of ice formation at the chimney outlet of the waste heat boiler, and has the advantages of simple structure and convenient processing and manufacturing; at the same time, the waste heat of flue gas is used to prevent ice formation without consuming other heat energy, which is economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Attached Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention.
[0019] Attached Figure 2 Yes Figure 1 A partial schematic diagram of a preferred embodiment of the present invention taken along line AA is shown.
[0020] Attached Figure 3 Yes Figure 2 The figure shows a schematic cross-sectional view taken along line BB of a preferred embodiment of the present invention.
[0021] Attached Figure 4 Yes Figure 2 Shown is a CC cross-sectional schematic diagram of a preferred embodiment of the present invention.
[0022] Explanation of the reference numerals: 1. Chimney; 2. Metal reinforcement ring; 3. Annular cavity; 4. Smoke inlet; 5. Smoke outlet; 6. Smoke guide hole; 7. Smoke guide plate. DETAILED DESCRIPTION
[0023] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.
[0024] Embodiment 1: As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 As shown, the present invention comprises a chimney 1, and a metal reinforcing ring 2 which is clamped on the outer wall of the chimney 1 at the outlet; The metal reinforcing ring 2 is hollow inside and forms an annular cavity 3 surrounding the chimney 1 outlet; The metal reinforcement ring 2 is formed by splicing together a number of sections of diamond-shaped steel pipes that are bent and matched with the outer wall of the chimney 1; The smoke inlet hole 4 is arranged on the inner wall of the metal reinforcing ring 2 which is close to the outer wall of the chimney 1 and is located at the bottom of the annular cavity 3; The smoke outlet holes 5 are arranged on the top wall of the metal reinforcement ring and are evenly distributed around the circumference; The smoke inlet 4 and the smoke outlet 5 are connected to the annular cavity 3; The smoke guide hole 6 is arranged on the inner wall of the chimney 1 at a position corresponding to the smoke inlet hole 4, and the smoke guide hole 6 is connected to the smoke inlet hole 4; The guide plate 7 is arranged on the inner wall of the chimney 1 near the upper edge of the smoke guide hole 6. The guide plate 7 extends from the inner wall of the chimney 1 toward the center of the chimney 1 and is inclined to one side where the smoke comes (the guide plate 7 is located near the chimney 1). Figure 2 not shown).
[0025] When the present invention is in use, the high-temperature flue gas in the chimney 1 encounters external cold air when being discharged through the chimney 1 outlet to form condensed water, and the condensed water flows back to the inner wall of the chimney 1 along the conical slope on the top wall of the metal reinforcement ring 2 to evaporate under heat; The high-temperature flue gas in the chimney 1 passes through the smoke guide plate 7 and flows into the smoke guide hole 6 along the smoke guide plate 7 , then enters the annular cavity 3 through the smoke inlet hole 4 to heat the metal reinforcement ring 2 , and then is discharged through the smoke outlet hole 5 .
[0026] Condensed water formed by the high-temperature flue gas in the annular cavity 3 flows back to the inner wall of the chimney 1 through the smoke inlet hole 4 and the smoke guide hole 6 to be heated and evaporated.
[0027] Since the high-temperature flue gas can continuously flow into the annular cavity 3 to heat the metal reinforcement ring 2, when the external ambient temperature is below zero, the condensed water will not freeze at the far end of the outer wall of the metal reinforcement ring 2. Therefore, the present invention can be widely used in working environments with ice in winter.
[0028] Of course, the above drawings and embodiments are only used to explain and illustrate the present invention, and cannot be used as improper limitations of the present invention. Any technical solutions obtained by those skilled in the art making equivalent adjustments and changes based on the present invention fall within the protection scope of the present invention.
Claims
1. An anti-icing structure for a waste heat boiler chimney outlet, comprising a chimney (1), a metal reinforcement ring (2) clamped on the outer wall of the chimney (1) at the outlet, characterized in that: The metal reinforcement ring (2) is hollow and forms an annular cavity (3) surrounding the outlet of the chimney (1); the inner side wall of the metal reinforcement ring (2) abutting against the outer wall of the chimney (1) is provided with a smoke inlet hole (4) and the top wall is provided with a smoke outlet hole (5); the smoke inlet hole (4) and the smoke outlet hole (5) are connected to the annular cavity (3); and the metal reinforcement ring (2) further comprises a smoke guide hole (6) provided on the inner wall of the chimney (1) corresponding to the position of the smoke inlet hole (4); the smoke guide hole (6) is connected to the smoke inlet hole (4).
2. The anti-icing structure of the chimney outlet of the waste heat boiler according to claim 1 is characterized in that: The top wall surface of the metal reinforcement ring (2) is a slope that is higher on the outside and lower on the inside, and the slope is located higher than the chimney (1) outlet.
3. The anti-icing structure of the chimney outlet of a waste heat boiler according to claim 1 or 2, characterized in that: The smoke outlet holes (5) are evenly distributed along the circumference of the top wall of the metal reinforcement ring (2).
4. The anti-icing structure of the chimney outlet of a waste heat boiler according to claim 1 or 2, characterized in that: The smoke inlet hole (4) is located at the bottom of the annular cavity (3).
5. The anti-icing structure of the chimney outlet of a waste heat boiler according to claim 1 or 2, characterized in that: The cross section of the metal reinforcement ring (2) is a hollow rhombus.
6. The anti-icing structure of the chimney outlet of the waste heat boiler according to claim 5, characterized in that: The metal reinforcement ring (2) is formed by splicing together a plurality of pipe sections that are made of diamond-shaped steel pipes and match the outer wall of the chimney (1).
7. The anti-icing structure of the chimney outlet of a waste heat boiler according to claim 1, characterized in that: It also includes a guide plate (7) arranged on the inner wall of the chimney (1) near the upper edge of the smoke guide hole (6), wherein the guide plate (7) extends from the inner wall of the chimney (1) toward the center of the chimney (1) and is inclined to one side toward the smoke.