Smoke flow channel of steam boiler inner container with compact structure

Abstract

The utility model discloses a flue gas flow channel of a steam boiler inner container with a compact structure, the flue gas flow channel comprises a cylindrical inner flue and a cylindrical outer flue, the inner flue is enclosed by an innermost membrane type wall, the outer flue is enclosed by a boiler wall and the outer side of the membrane type wall, the inner flue and the outer flue are communicated through a smoke passing hole, and the inner flue is communicated with the outer flue through the smoke passing hole. The smoke passing hole is close to the end part of the inner flue; when the membrane wall is communicated with the fire outlet hole of the combustor, the plug is connected with the top of the inner flue; when the furnace wall is communicated with the fire outlet hole of the combustor, the plug is connected with the top of the outer flue; the furnace wall is provided with a smoke outlet hole for discharging smoke; the membrane type wall has the beneficial effects that the inner flue and the outer flue are sequentially communicated through the plug and the smoke passing hole to form a structure for simultaneously heating the two sides of the membrane type wall, so that the utilization rate of smoke is increased, and the structural form that the single side of the traditional membrane type wall is heated is improved; and the inner flue and the outer flue can be cleaned in a detachable manner.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steam boiler flue, especially relates to a flue gas flow channel of steam boiler inner container of compact structure. BACKGROUND

[0002] The membrane wall type boiler furnace of prior art is all heated on the inner side of the membrane wall, especially the membrane wall on the left outer side of the multi-layer membrane wall structure furnace is all heated on the inner side, which results in that the heating area of the membrane wall cannot be fully utilized, and is not conducive to energy saving. The outermost membrane wall of the structure disclosed in Chinese patent CN105465760A can only be heated on the inner side, which has certain influence on the full utilization of heat. SUMMARY

[0003] The utility model discloses a flue gas flow channel of steam boiler inner container of compact structure, which aims to solve the technical problem that the membrane wall type boiler furnace is all heated on the inner side of the membrane wall, especially the membrane wall on the left outer side of the multi-layer membrane wall structure furnace is all heated on the inner side, and the heating area of the membrane wall cannot be fully utilized, which is not conducive to energy saving.

[0004] The utility model embodiment is realized as follows:

[0005] A flue gas flow channel of steam boiler inner container of compact structure, the flue gas flow channel includes cylindrical inner flue and cylindrical outer flue, the inner flue is surrounded by the innermost membrane wall, the outer flue is surrounded by the furnace wall and the outer side of the membrane wall, the inner flue and the outer flue are communicated through the smoke hole, the smoke hole is close to the end of the inner flue, when the membrane wall is communicated with the fire hole of the burner, the sealing is connected with the top of the inner flue, when the furnace wall is communicated with the fire hole of the burner, the sealing is connected with the top of the outer flue, and the furnace wall is provided with the smoke hole to discharge the flue gas.

[0006] Further, the smoke hole is the gap between the bottom edge of the rib plate of the membrane wall and the bottom of the inner flue or the outer flue.

[0007] Further, the smoke hole is the through hole of the bottom of the rib plate, the bottom edge of the lowermost rib plate of the rib plate and the bottom of the inner flue or the outer flue are welded together, the bottom of the rib plate is provided with the through hole, and the through hole connects the inner flue and the outer flue.

[0008] Further, the bottom of the inner flue is provided with the bottom plate, the bottom end of the heat conduction rod is welded together with the bottom plate, and the bottom surface of the bottom plate is fixed with the bottom plate heat preservation layer.

[0009] Further, the sealing includes the circular top plate or annular top plate, and the circular top plate heat preservation layer 18 or annular top plate heat preservation layer is fixed to the outer side of the circular top plate or annular top plate.

[0010] Furthermore, the circular top plate is fastened to the inside of the upper header by snap-fit ​​or bolt connection.

[0011] Furthermore, one side of the annular top plate is snapped or bolted to the furnace wall, and the other side of the seal is snapped or bolted to the outer side of the membrane wall.

[0012] The positive effects of this utility model are: by sealing and connecting the inner and outer flues in sequence through the flue and the smoke passage, a structure is formed that heats both sides of the membrane wall simultaneously, which improves the utilization rate of flue gas and improves the traditional membrane wall structure of unilateral heating; at the same time, when the sealing is detachably fastened to the end of the inner or outer flue, the inner and outer flues can be cleaned by disassembly, thus extending the service life of the boiler. Attached Figure Description

[0013] Figure 1 This is a top view of the flue gas flow channel of the inner liner of a compact steam boiler according to this utility model.

[0014] Figure 2 yes Figure 1 The diagram shows a cross-sectional view along direction AA of the flue gas passage of the inner liner of a compact steam boiler according to this utility model.

[0015] Figure 3 yes Figure 2 The present invention illustrates a second structural form of the flue gas passage of a compact steam boiler inner liner.

[0016] Figure 4 yes Figure 1 The present invention illustrates a second structural form of the flue gas passage of a compact steam boiler inner liner.

[0017] Legend: 1—Heat conduction rod, 2—Heating water pipe, 3—Flame, 4—Furnace wall, 401—Furnace wall insulation layer, 402—Smoke outlet, 5—Bottom edge of rib plate, 6—Smoke passage hole, 7—Bottom plate, 8—Bottom plate insulation layer, 9—Rib plate, 10—Bottom of heat conduction rod, 11—Inner flue, 12—Outer flue, 13—Burner, 14—Baffle plate, 15—Second hot chamber, 16—Gas collection bag, 17—Steam pipe, 18—Top plate insulation layer, 1801—Annular top plate insulation layer, 19—Top plate, 1901—Annular top plate, 20—Membrane wall, 21—Outer membrane wall, 22—Smoke guide plate. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0019] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0020] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples.It should be understood that the specific examples described herein are only used to explain the utility model and not used to limit the utility model.

[0021] As shown in Figure 1 and Figure 2 , it is a structure diagram of a flue gas flow channel of a steam boiler inner container with compact structure provided by the utility model embodiment, which comprises a cylindrical inner flue 11 and a cylindrical outer flue 12, the inner flue 11 is surrounded by the membrane wall 20 of the innermost layer, the outer flue 12 is surrounded by the furnace wall 4 and the outer side of the membrane wall 20, the inner flue 11 and the outer flue 12 are communicated through the smoke passing hole 6, the smoke passing hole 6 is close to the end part of the inner flue 11 or the outer flue 12; the smoke passing hole 6 is formed by the rib plate of the membrane wall, or is jointly formed by the rib plate 9 of the membrane wall and the end part of the inner flue 11 or the outer flue 12; the membrane wall 20 or the furnace wall 4 is tightly fixed and communicated with the fire hole of the burner 13; the inner flue 11 or the outer flue 12 is separately communicated with the smoke outlet hole 402; the end part of the inner flue 11 or the outer flue 12 is welded or detachably fastened with the sealing.

[0022] In the utility model embodiment, the inner flue and the outer flue are sequentially communicated through the sealing and the smoke passing hole, a structure for simultaneously heating the membrane wall from both sides is formed, the utilization rate of flue gas is improved, and the structure form of the traditional membrane wall single-side heating is improved; meanwhile, when the end part of the inner flue 11 or the outer flue 12 is detachably fastened with the sealing, the inner and outer flues can also be cleaned through the detachable mode, and the service life of the boiler is prolonged.

[0023] Specifically, as shown in Figure 1 and Figure 2 , a flue gas flow channel of a steam boiler inner container with compact structure, comprising an inner flue 11 and an outer flue 12, the inner flue 11 is surrounded by the membrane wall 20 of the innermost layer, the outer flue 12 is surrounded by the furnace wall 4 and the outer side of the membrane wall 20, the inner flue 11 and the outer flue 12 are communicated through the smoke passing hole 6.

[0024] Wherein the membrane wall 20 has the heat conducting rod 1, the heating water pipe 2 and the rib plate 9 are composed, wherein the top of the heating water pipe 2 is communicated with the annular upper header, the bottom of the heating water pipe 2 is communicated with the annular lower header, the top of the heat conducting rod 1 is inserted in the heating water pipe 2;Between the upper header and the lower header, the rib plate 9 and the adjacent heating water pipe 2 are welded together;In the space from the lower header to the bottom of the inner flue, the rib plate 9 and the heat conducting rod bottom 10 of the heat conducting rod 1 are welded together.

[0025] The smoke passing hole 6 is close to the end of the inner flue 11 or the outer flue 12;Specifically, when the smoke passing hole 6 is close to the bottom of the inner flue 11 or the outer flue 12, as shown in the figure, the lowermost rib plate bottom edge 5 of the rib plate 9 keeps a certain distance from the bottom of the inner flue 11 or the outer flue 12, forming the smoke passing hole 6;Or the lowermost rib plate bottom edge 5 of the rib plate 9 is welded together with the bottom of the inner flue 11 or the outer flue 12, but a through hole is provided at the bottom of the rib plate 9, and the through hole connects the inner flue 11 and the outer flue 12. Figure 2 The smoke passing hole 6 is close to the end of the inner flue 11 or the outer flue 12;Specifically, when the smoke passing hole 6 is close to the bottom of the inner flue 11 or the outer flue 12, as shown in the figure, the lowermost rib plate bottom edge 5 of the rib plate 9 keeps a certain distance from the bottom of the inner flue 11 or the outer flue 12, forming the smoke passing hole 6;Or the lowermost rib plate bottom edge 5 of the rib plate 9 is welded together with the bottom of the inner flue 11 or the outer flue 12, but a through hole is provided at the bottom of the rib plate 9, and the through hole connects the inner flue 11 and the outer flue 12.

[0026] The sealing is welded or detachably fastened with the end of the inner flue 11 or the outer flue 12:

[0027] Specifically, as shown in the figure, when the sealing is located inside the top of the inner flue 11, the sealing can be welded with the inside of the upper header by using steel plate;In addition, when the sealing is made of steel plate, it can also be fastened with the upper header by clamping or bolt connection, at this time the upper header can be provided with clamping boss or connecting table for bolt connection;Preferably, when the sealing is fastened with the upper header by clamping or bolt connection, the connecting part is padded with refractory material for sealing the gap, at this time the flame 3 generated by the burner 13 enters the inner flue, and the flue gas flows in the direction of the arrow in the figure. Figure 2 Figure 2

[0028] As shown in the figure, when the sealing is located outside the top of the inner flue 11, the sealing is annular, one side of the sealing is welded with the furnace wall, and the other side of the sealing is welded with the outside of the membrane wall, specifically with the outside of the upper header;In addition, when the sealing is located outside the top of the inner flue 11, the sealing is annular, one side of the sealing is clamped or bolt connected with the furnace wall, and the other side of the sealing is clamped or bolt connected with the outside of the membrane wall, specifically with the outside of the upper header, at this time the inside of the furnace wall and the outside of the upper header are both provided with annular boss, and the annular boss is provided with clamping structure or screw hole, preferably, the clamping or bolt connection connecting part is padded with refractory material for sealing the gap, at this time the flame 3 generated by the burner 13 enters the outer flue, and the flue gas flows in the direction of the arrow in the figure. Figure 4 Figure 4 ​​​​

[0029] Preferably, the sealing includes a circular top plate 19 or an annular top plate 1901, and a circular top plate insulation layer 18 or an annular top plate insulation layer 1801 is fixed outside the circular top plate 19 or the annular top plate 1901.

[0030] Preferably, the bottom of the inner flue is provided with a bottom plate 7, and the bottom end of the heat-conducting rod 1 is welded to the bottom plate 7, and the bottom surface of the bottom plate 7 is fixed with a bottom plate insulation layer 8.

[0031] Preferably, as shown in the drawings, the membrane wall is provided with two layers, i.e., a membrane wall 20 and an outer membrane wall 21, and the inner flue is surrounded by the membrane wall 20 and the outer membrane wall 21, and the outer flue is surrounded by the outer membrane wall 21 and the furnace wall 4. Figure 3

[0032] Preferably, the top of the furnace wall 4 is provided with a second heat chamber 15, and the second heat chamber 15 can be separated from the inner flue or the outer flue by a partition plate 14, or the second heat chamber 15 can be in communication with the inner flue or the outer flue without using the partition plate 14.

[0033] The second heat chamber 15 is provided with a steam pipe 17, the bottom of the steam pipe 17 is in communication with the upper header, the top of the steam pipe 17 is in communication with a gas collecting pocket 16, and the bottom of the gas collecting pocket 16 is located in the second heat chamber.

[0034] Preferably, the furnace wall 4 is provided with a furnace wall insulation layer 401.

[0035] The foregoing has broadly outlined some aspects and features of various embodiments, and should be construed as merely illustrative of potential applications. Other beneficial results can be attained by applying the disclosed information in a different manner or by combining it with other aspects of the disclosed embodiments. Other aspects and a more complete understanding of the exemplary embodiments can be attained by referring to the detailed description of the exemplary embodiments in conjunction with the accompanying drawings referenced by the claims.

[0036] The above embodiments have been described in detail. Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or reductions, or replacements made by those skilled in the art within the scope of the present application are also within the protection scope of the present application.​

Claims

1. A flue gas flow channel in the inner liner of a compact steam boiler, characterized in that, The flue gas flow path includes a cylindrical inner flue and a cylindrical outer flue. The inner flue is surrounded by the innermost membrane wall, and the outer flue is surrounded by the furnace wall and the outer side of the membrane wall. The inner and outer flues are connected by a flue gas passage hole, which is located near the end of the inner flue. When the membrane wall is connected to the burner's outlet hole, the seal is connected to the top of the inner flue. When the furnace wall is connected to the burner's outlet hole, the seal is connected to the top of the outer flue. The furnace wall is provided with a flue gas outlet hole to discharge flue gas.

2. The flue gas flow channel of the compact steam boiler inner liner according to claim 1, characterized in that, The smoke passage is the gap between the bottom edge of the rib plate of the membrane wall and the bottom of the inner or outer smoke duct.

3. The flue gas flow channel of the compact steam boiler inner liner according to claim 1, characterized in that, The smoke passage is a through hole at the bottom of the rib plate. The bottom edge of the lowest rib plate is welded to the bottom of the inner or outer smoke duct. The bottom of the rib plate is provided with a through hole that connects the inner and outer smoke ducts.

4. The flue gas flow channel of the compact steam boiler inner liner according to claim 3, characterized in that, The bottom of the internal flue is provided with a base plate, the bottom end of the heat-conducting rod is welded to the base plate, and the bottom surface of the base plate is fixed with a base plate insulation layer.

5. The flue gas flow passage of a compact steam boiler inner liner according to any one of claims 1 to 4, characterized in that, The sealing includes a circular top plate or an annular top plate; the circular top plate is fixed with a circular top plate insulation layer; the annular top plate is fixed with an annular top plate insulation layer on its outer side.

6. The flue gas flow channel of the compact steam boiler inner liner according to claim 5, characterized in that, The circular top plate is fastened to the inside of the upper header by snap-fit ​​or bolt connection.

7. The flue gas flow channel of the compact steam boiler inner liner according to claim 5, characterized in that, One side of the annular top plate is clamped or bolted to the furnace wall, and the other side of the seal is clamped or bolted to the outer side of the membrane wall.

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