CN216716263U - Flue gas channel flow guide structure capable of optimizing flue gas flow field - Google Patents
Flue gas channel flow guide structure capable of optimizing flue gas flow field Download PDFInfo
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- CN216716263U CN216716263U CN202123386631.6U CN202123386631U CN216716263U CN 216716263 U CN216716263 U CN 216716263U CN 202123386631 U CN202123386631 U CN 202123386631U CN 216716263 U CN216716263 U CN 216716263U
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Abstract
The utility model relates to a waste incineration exhaust-heat boiler. The purpose is to provide a flue gas channel diversion structure that can optimize flue gas flow field to improve the passageway and deviate flow, make the flue gas flow more evenly when getting into next passageway simultaneously, reduce the air current blind spot, strengthen heat transfer effect, improve boiler efficiency. The technical scheme is as follows: a flue gas channel flow guide structure capable of optimizing a flue gas flow field is positioned at corner parts of two vertically arranged channels formed by water-cooled walls: the method is characterized in that: the flow guide structure is a bulge arranged at the tail end of the previous channel; the projection of the horizontal plane of the protrusion is one third to one fifth of the section of the channel, and the included angle M between the plane of the channel facing to the input smoke and the horizontal plane is 40-50 degrees.
Description
Technical Field
The utility model relates to a waste incineration exhaust-heat boiler, in particular to a flow guide structure for multiple flues, which can optimize a flue gas flow field and improve the boiler efficiency.
Background
The waste incineration power generation in China becomes a main mode for harmless treatment of the waste, the waste can be changed into valuable, and economic benefits are generated while the waste is treated. Waste heat boilers are used as main equipment, and the control of the efficiency and the cost of the waste heat boilers is increasingly emphasized. The main factor influencing the efficiency of the boiler is heat loss, namely, the heat of the flue gas cannot be absorbed and utilized. How to ensure that the heating surface of the waste heat furnace exchanges heat with the flue gas as fully as possible, the equipment utilization is maximized, and the method is one direction for improving the thermal efficiency of the boiler.
A flue gas channel of the waste incineration waste heat furnace is generally provided with a multi-channel structure according to the characteristics of flue gas, the channel is composed of water-cooled walls, and the flue gas sequentially flows through the channel to exchange heat. However, under the influence of negative pressure and physical inertia, the flow of the flue gas in the channel is uneven, the flue gas can bias towards the middle wall surface, and an airflow dead zone can be formed at a corner, and the flue gas in the area can not flow through the heating surface, so that the heat exchange effect is poor, and the boiler efficiency is influenced (see fig. 3).
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the background technology, and provides a flue gas channel flow guide structure capable of optimizing a flue gas flow field so as to improve the channel bias flow, make the flow of flue gas more uniform when the flue gas enters the next channel, reduce the dead zone of gas flow, enhance the heat exchange effect and improve the boiler efficiency.
The technical scheme provided by the utility model is as follows:
a flue gas channel flow guide structure capable of optimizing a flue gas flow field is positioned at corner parts of two vertically arranged channels formed by water-cooled walls: the method is characterized in that: the flow guide structure is a protrusion arranged at the tail end of the previous channel; the projection of the horizontal plane of the protrusion is one third to one fifth of the section of the channel, and the included angle M between the plane of the channel facing to the input smoke and the horizontal plane is 40-50 degrees.
The protrusions comprise folded plates fixed on the middle water-cooling wall through supporting plates, a plurality of grabbing hooks arranged on the outer side faces of the folded plates and a layer of pouring material laid on the outer side faces of the folded plates through the grabbing hooks.
The thickness of the casting material is 100-150 mm.
The beneficial effects of the utility model are: according to the utility model, the shape of the flue is locally changed at the key position, so that the flue gas is guided to flow more reasonably and uniformly, the generation of flue gas bias flow and air flow dead zones is reduced, the heat exchange effect of the heating surface and the flue gas is enhanced, and the boiler efficiency is improved. The utility model has the advantages of light and firm structure, corrosion resistance, high temperature resistance and convenient installation, does not influence the structure of the heat exchange surface of the boiler, is suitable for both new boilers and old furnaces, and has strong applicability and economy.
Drawings
Fig. 1 is an enlarged schematic view of the present invention (i.e., an enlarged schematic view of the flow guide structure in fig. 2).
FIG. 2 is a flue gas flow field schematic diagram of a flue gas channel of the waste incineration waste heat furnace provided by the utility model.
FIG. 3 is a schematic structural diagram of a flue gas channel of a conventional waste incineration waste heat furnace.
Detailed Description
The following further description is made with reference to the embodiments shown in the drawings.
The flue gas channel flow guide structure D capable of optimizing a flue gas flow field is shown in the attached drawing and is positioned at the corner part of two vertically arranged channels formed by water cooling walls (namely a front channel surrounded by a front water cooling wall 1, a middle water cooling wall 2 and two side water cooling walls 4 at intervals and a rear channel surrounded by the middle water cooling wall 2, a rear water cooling wall 3 and the two side water cooling walls 4 at intervals). The flow guide structure is a protrusion arranged at the tail end of the previous channel, and the protrusion is arranged at the tail end of the middle water-cooled wall and connected with the water-cooled wall header 10; as can be seen from fig. 1: the front side and the rear side of the protrusion (namely the two sides vertical to the paper surface) are respectively connected with two side water-cooling walls with a spacing distance; the projection of the horizontal plane of the protrusion is one third to one fifth of the section of the previous channel, and the included angle M between the plane of the channel facing the input smoke and the horizontal plane is 40-50 degrees, so that the protrusion is used for guiding airflow and avoiding dust accumulation.
The protruded structure comprises a folded plate 6 (the folded plate is in a bent strip shape, the width of the folded plate is suitable for the previous channel, the bent shape of the folded plate is suitable for the shape of the left side edge of the supporting plate), a plurality of grapples 7 arranged on the outer side surface of the folded plate, and a layer of casting material 8 laid on the outer side surface of the folded plate (the layer of casting material is also coated on the outer surface of a water-cooled wall header box in the prior art, the outer surface of the water-cooled wall header box is also coated with a layer of casting material), wherein the folded plate 6 is fixed on the water-cooled wall through a supporting plate 5 (as shown in figure 1, the supporting plate is arranged in parallel to the paper surface, and the left side edge and the right side edge of each supporting plate are respectively welded and fixed with the middle water-cooled wall and the folded plate); the outer surface of the folded plate can be additionally provided with a plurality of reinforcing ribs 9 to enhance the fastness of the casting material.
The arrows in the figure indicate the smoke flow direction.
The above description is only a preferred embodiment of the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A flue gas channel flow guide structure capable of optimizing a flue gas flow field is positioned at corner parts of two vertically arranged channels formed by water-cooled walls: the method is characterized in that: the flow guide structure is a protrusion arranged at the tail end of the previous channel; the projection of the horizontal plane of the protrusion is one third to one fifth of the section of the channel, and the included angle (M) between the plane of the channel facing to the input smoke and the horizontal plane is 40-50 degrees.
2. The flue gas channel flow guide structure capable of optimizing a flue gas flow field according to claim 1, wherein: the protrusions comprise folded plates (6) fixed on the reclaimed water cooling wall (2) through supporting plates (5), a plurality of grapples (7) arranged on the outer side surfaces of the folded plates and a layer of pouring material (8) laid on the folded plates through the grapples.
3. The flue gas channel flow guide structure capable of optimizing a flue gas flow field according to claim 2, wherein: the thickness of the castable is 100-150 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123386631.6U CN216716263U (en) | 2021-12-24 | 2021-12-24 | Flue gas channel flow guide structure capable of optimizing flue gas flow field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123386631.6U CN216716263U (en) | 2021-12-24 | 2021-12-24 | Flue gas channel flow guide structure capable of optimizing flue gas flow field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216716263U true CN216716263U (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123386631.6U Active CN216716263U (en) | 2021-12-24 | 2021-12-24 | Flue gas channel flow guide structure capable of optimizing flue gas flow field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216716263U (en) |
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2021
- 2021-12-24 CN CN202123386631.6U patent/CN216716263U/en active Active
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