Household garbage incineration vertical waste heat boiler evaporator flue structure and waste heat boiler

Abstract

The utility model discloses a household garbage incineration vertical waste heat boiler evaporator flue structure and a waste heat boiler, the evaporator flue structure comprises a peripheral cavity formed by connecting four coaming assemblies, and an evaporator pipe set is arranged in the peripheral cavity; each coaming assembly comprises a plurality of combination plates, longitudinal reinforcing ribs arranged between every two adjacent combination plates and rigid beams, each combination plate comprises a plurality of protection plates and connecting plates arranged between every two adjacent protection plates, and the ends, close to the longitudinal reinforcing ribs, of the connecting plates are connected with the side walls of the longitudinal reinforcing ribs; a first folded plate is connected between the end of each connecting plate and the adjacent protective plate, and a second folded plate is connected between the side wall of each longitudinal reinforcing rib and the adjacent protective plate. The utility model has the beneficial effects that the joints of the protective plate, the connecting plate and the longitudinal reinforcing ribs can bear the expansion difference generated by heating in the evaporator flue, the structural shape can be kept in a hot state, and the condition that the protective plate is cracked in a long-term use process is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of boiler evaporator flue equipment, and more specifically, to a vertical waste heat boiler evaporator flue for incinerating domestic waste. Background Art

[0002] Waste heat boilers for incineration of domestic waste are environmentally friendly, energy-saving, and improve the atmospheric environment. They reduce landfill while generating electricity and providing heat. Vertical boilers have the advantage of a small footprint compared to horizontal boilers of the same level. Under the condition of the same waste processing capacity, although the height of the vertical boiler is relatively high, the footprint is only about half of that of the horizontal boiler, which has the obvious advantage of a small footprint. The structure of the existing vertical waste heat boiler for incineration of domestic waste is disclosed in the patent with application number 202023184966.5, which is a vertical single-furnace waste heat boiler structure for incinerating garbage. In the vertical waste heat boiler, the evaporator flue is located behind the furnace and the horizontal flue and in front of the economizer, starting from the flue gas inlet of the evaporator flue and ending at the flue gas outlet. The main function of the evaporator flue is to transfer the furnace flue gas from the flue gas inlet to the flue gas outlet, so that the flue gas enters the economizer at the rear of the evaporator flue, and at the same time uses the flue gas to heat the medium in the evaporator tube group inside the evaporator flue. At present, the structure of the existing evaporator flue includes: an outer cavity formed by four enclosure panels connected in sequence, each enclosure panel assembly includes a plurality of spaced composite panels and longitudinal reinforcing ribs arranged between adjacent composite panels, each composite panel includes a plurality of guard plates spaced from top to bottom and connecting plates arranged between adjacent guard plates, a rigid beam is arranged outside the plurality of connecting plates at the same height on each side, and the rigid beam is connected to the plurality of longitudinal reinforcing ribs on the side through plate hooks, wherein the guard plates and connecting plates are directly welded to the longitudinal reinforcing ribs, and the guard plates and connecting plates are also directly welded, an evaporator tube group is arranged in the outer cavity, and considering the problems of expansion and stress, the existing evaporator flue is usually suspended to the top plate of the boiler steel structure, and the outer cavity and the evaporator tube group are suspended to the top plate of the boiler steel structure respectively. However, in the above structure, since the evaporator flue will expand due to the heat inside when in use, the flue gas temperature decreases from high to low from the flue inlet to the flue outlet. When the guard plate and the connecting plate and the guard plate and the longitudinal reinforcement are directly welded, the upper structure expands more than the lower structure, which can easily lead to the upper structure being larger than the lower structure, causing a large change in the shape of the overall structure, and the guard plate at the connection is easily torn and damaged, thereby affecting the use of the waste heat boiler.

[0003] Therefore, there is an urgent need for a new type of connection structure between the guard plate, the connecting plate and the longitudinal reinforcing ribs to improve the above problems. Utility Model Content

[0004] One object of the utility model is to solve at least the above-mentioned problems and to provide an evaporator flue of a vertical waste heat boiler for incineration of domestic waste, so that the connection between the guard plate, the connecting plate and the longitudinal reinforcing ribs will not change in shape due to the expansion difference caused by internal heating when the flue gas temperature is different from top to bottom of the evaporator flue, and the guard plate at that location can be prevented from being torn during long-term use.

[0005] In order to achieve these purposes and other advantages according to the utility model, a flue of an evaporator of a vertical waste heat boiler for incineration of domestic waste is provided, comprising four vertical enclosure panels arranged along four sides of a square, the four enclosure panels being connected in sequence to form an outer cavity, an evaporator tube group being arranged in the outer cavity, and a smoke inlet and a smoke outlet being arranged on the outer cavity along the direction of smoke; each enclosure panel assembly comprises a plurality of combined panels arranged at intervals in the horizontal direction, longitudinal reinforcing ribs arranged between two adjacent combined panels, and a plurality of I-shaped rigid beams, each combined panel comprises a plurality of guard plates arranged at intervals in sequence from top to bottom, and a connecting plate arranged between two adjacent guard plates, a rigid beam is arranged outside a plurality of connecting plates at the same height on each side, each rigid beam is connected to a plurality of longitudinal reinforcing ribs on the same side by a plurality of plate hooks, and a connecting assembly is arranged at the four corners of the four rigid beams at the same height to connect the two rigid beams at the corners;

[0006] The end of the connecting plate close to the longitudinal reinforcing rib is connected to the side wall of the longitudinal reinforcing rib;

[0007] In the vertical direction, a first folding plate is connected between the end of each connecting plate and the adjacent guard plate, so that an angle connection is formed between the connecting plate and the guard plate;

[0008] In the horizontal direction, a second folding plate is connected between the side wall of each longitudinal reinforcing rib and the adjacent guard plate, so that an angle connection is formed between the longitudinal reinforcing rib and the guard plate;

[0009] Among them, each connection of the peripheral cavity is closed.

[0010] Preferably, the connecting plate includes a vertical plate and a pair of support plates respectively arranged near the top and bottom of the vertical plate, the vertical plate and the guard plate are located in the same vertical plane, the pair of support plates are both arranged on the side wall of the vertical plate away from the inner part of the peripheral cavity, one end of the first folding plate is connected to the guard plate, and the other end is connected to the middle part of the support plate of the adjacent connecting plate.

[0011] Preferably, the connecting assembly includes a corner plate, a first plate, a second plate, a third plate, and a fourth plate, the corner plates are respectively connected to the vertical plates of the two connecting plates at the corners, one end of the first plate and the second plate are hinged to the corner plate, the other ends of the first plate and the second plate are respectively hinged to the third plate and the fourth plate, and the other ends of the third plate and the fourth plate are respectively connected to the two rigid beams at the corners.

[0012] Preferably, the vertical plates of the two connecting plates at the corners are welded, and the two guard plates at the corners are connected by guard plate connectors, the guard plate connectors include an L-shaped plate arranged in the vertical direction, the right-angle end of the L-shaped plate is close to the corner and the two guard plates at the corner correspond to the two plate bodies of the L-shaped plate, and the two guard plates at the corners are provided with a third folding plate, and the free end of the third folding plate is connected to the corresponding L-shaped plate body, so that the guard plate and the corresponding L-shaped plate body form an angled connection;

[0013] Wherein, the top end and the bottom end of the L-shaped plate are respectively connected to two connecting plates at corresponding corners.

[0014] Preferably, the side wall of the longitudinal reinforcing rib close to the inner part of the peripheral cavity is flush with the guard plate on the same side, and one end of the second folding plate is connected to the guard plate and the other end is connected to the middle part of the side wall close to the longitudinal reinforcing rib.

[0015] Preferably, each longitudinal stiffener is provided with a plurality of pairs of opposing plate hooks from top to bottom on both side walls along the horizontal direction, and the plurality of pairs of plate hooks correspond one-to-one to a plurality of rigid beams located on the same side of the longitudinal stiffener, and the hook ends of each pair of plate hooks are respectively hooked on a pair of flange plates of the corresponding rigid beam, and the other end is connected to the longitudinal stiffener.

[0016] Preferably, it further comprises an ash discharge hopper, which is arranged below the peripheral cavity and connected to the peripheral cavity.

[0017] Preferably, an expansion joint is provided at the smoke outlet.

[0018] A waste heat boiler is used for incinerating domestic waste, and the waste heat boiler comprises the evaporator flue structure of the domestic waste incineration waste heat boiler.

[0019] The utility model at least has the following beneficial effects:

[0020] By designing an evaporator tube group, a flue gas inlet, a flue gas outlet, a guard plate, a connecting plate, a longitudinal reinforcement rib, a rigid beam, a first folding plate and a second folding plate, a structure of an evaporator flue is provided. When in use, the flue gas from the furnace and the horizontal flue enters the evaporator flue through the flue gas inlet, and then flows out from the flue gas outlet after passing through the evaporator tube group. In this process, since the flue gas temperature inside the flue is relatively high and the temperature is high from top to bottom, the inside of the evaporator flue expands due to the heat and is fed back to the inner wall of the outer cavity. Since the guard plate is connected to the connecting plate and the longitudinal reinforcement rib respectively through the first folding plate and the second folding plate, the folding angle formed by the first folding plate and the second folding plate buffers the deformation and stretching caused by the thermal expansion of the guard plate. Compared with the form of directly welding the guard plate to the longitudinal reinforcement rib / connecting plate, the bending connection method of the utility model can effectively improve the shape change of the guard plate due to the upper and lower temperature difference during long-term use, and the tearing caused by thermal expansion, thereby improving the use effect and service life of the evaporator flue.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural front view of the flue of the evaporator of the waste heat boiler for incineration of domestic waste described in one of the technical solutions of the utility model;

[0023] Figure 2 This is a structural front view of a waste heat boiler according to one of the technical solutions of the utility model;

[0024] Figure 3 for Figure 2 Middle AA view;

[0025] Figure 4 A top view of the connection structure of the connection plate, the rigid beam, and the connection plate connector according to one of the technical solutions of the utility model;

[0026] Figure 5 for Figure 1 Enlarged view of point G in the middle;

[0027] Figure 6 for Figure 1 Middle DD view;

[0028] Figure 7 for Figure 3 Middle BB view;

[0029] Figure 8 for Figure 2 Middle JJ view;

[0030] Fig. 9 for Figure 1 Middle OO view;

[0031] Fig.10 for Figure 1 Middle KK view;

[0032] Fig.11 This is a schematic diagram of the connection structure of the L-shaped plate and two connecting plates at the corners described in one of the technical solutions of the utility model;

[0033] Fig.12 This is a schematic structural diagram of a closed cross-connection of a connector according to one of the technical solutions of the utility model.

[0034] Figure markings: 1-evaporator tube group; 2-guard plate; 3-connecting plate; 301-vertical plate; 302-support plate; 4-rigid beam; 5-first folding plate; 6-second folding plate; 7-plate hook; 8-longitudinal reinforcement rib; 9-angle plate; 10-first plate; 11-second plate; 12-furnace; 13-third plate; 14-fourth plate; 15-L-shaped plate; 16-ash hopper; 1601-ash hopper guard plate; 1602-ash hopper ring beam; 17-horizontal flue; 18-steel structure top plate; 19-expansion joint; 20-evaporator flue; 21-closure; 2101-fifth plate; 2102-sixth plate; 2103-middle plate; 22-third folding plate. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0036] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0037] like Figure 1-12 As shown, the utility model provides a flue structure of an evaporator of a vertical waste heat boiler for incineration of domestic waste, comprising four vertical enclosure panels arranged along four sides of a square, the four enclosure panels being connected in sequence to form an outer cavity, an evaporator tube group 1 being arranged in the outer cavity, and a smoke inlet and a smoke outlet being arranged on the outer cavity along the direction of smoke; each enclosure panel assembly comprises a plurality of combined panels arranged at intervals in a horizontal direction, longitudinal reinforcing ribs 8 arranged between two adjacent combined panels, and a plurality of I-shaped rigid beams 4, each combined panel comprises a plurality of guard plates 2 arranged at intervals in sequence from top to bottom, and a connecting plate 3 arranged between two adjacent guard plates, a plurality of connecting plates at the same height on each side are each provided with a rigid beam 4, each rigid beam 4 is connected to a plurality of longitudinal reinforcing ribs 8 on the same side by a plurality of plate hooks 7, and four corners of the four rigid beams 4 at the same height are provided with connecting components to connect the two rigid beams 4 at the corners;

[0038] The end of the connecting plate 3 close to the longitudinal reinforcing rib 8 is connected to the side wall of the longitudinal reinforcing rib 8;

[0039] In the vertical direction, a first folding plate 5 is connected between the end of each connecting plate 3 and the adjacent guard plate 2, so that an angle connection is formed between the connecting plate 3 and the guard plate 2;

[0040] In the horizontal direction, a second folding plate 6 is connected between the side wall of each longitudinal reinforcing rib 8 and the adjacent guard plate 2, so that an angle connection is formed between the longitudinal reinforcing rib 8 and the guard plate 2;

[0041] Among them, each connection of the peripheral cavity is closed;

[0042] In the above technical solution, the evaporator flue 20 is a square structure as a whole, which includes four enclosure assemblies, which are arranged along the four sides of the square, so that the four enclosure assemblies are connected in sequence to form a square peripheral cavity, and a flue gas inlet and a flue gas outlet are arranged on the peripheral cavity according to the direction of the flue gas, wherein the evaporator tube group 1 is arranged in the peripheral cavity, and the flue gas from the furnace and the horizontal flue enters the evaporator tube group through the flue gas inlet and then flows out through the flue gas outlet. The direction of the flue gas is as follows: Figure 2 The middle arrow goes in the direction; during actual installation, the evaporator tube group 20 and the peripheral cavity are respectively suspended on the boiler steel structure top plate 18;

[0043] Each enclosure assembly includes a plurality of combined plates arranged at intervals, the plurality of combined plates are arranged in the horizontal direction, a longitudinal reinforcing rib 8 is arranged between two adjacent combined plates, each combined plate includes a plurality of guard plates 2 arranged at intervals in the vertical direction and a connecting plate 3 arranged between adjacent guard plates 2, and the connecting plate 3 in the combined plate is directly welded to the longitudinal reinforcing rib 8;

[0044] There is a certain distance between the guard plate 2 in the combined plate and the longitudinal reinforcing rib 8. The end of the guard plate 2 in the combined plate close to the longitudinal reinforcing rib 8 is provided with an inclined second folded plate 6. The end of the second folded plate 6 away from the guard plate 2 is welded to the longitudinal reinforcing rib 8, so that a folded angle connection is formed between the second folded plate 6 and the side wall of the longitudinal reinforcing rib 8. The folded angle at the connection between the second folded plate 6 and the side wall of the longitudinal reinforcing rib 8 (the folded angle refers to the folded angle close to the inner wall of the peripheral cavity, such as Fig.10 Center angle A, Fig.10 The top view of the connecting structure of the guard plate 2 and the longitudinal reinforcing rib 8 can be an acute angle or an obtuse angle, preferably an angle between 30 and 135 degrees; the ends of the two guard plates 2 at the corner are connected to close the corner, and the corner refers to the four right-angle ends of the peripheral cavity;

[0045] The connection between the guard plate 2 and the connecting plate 3 in each combined plate is as follows: the end of the guard plate 2 close to the connecting plate 3 is provided with a first folding plate 5, the first folding plate 5 is arranged on the side wall of the guard plate 2 away from the peripheral cavity, and the free end of the first folding plate 5 is welded to the connecting plate 3, so that the first folding plate 5 and the side wall connected to the connecting plate 3 form an angle connection (the angle is as follows Fig. 9 Middle fold angle B), similarly, the fold angle can be an acute angle or an obtuse angle, preferably an angle between 30 and 135 degrees; the ends of the two connecting plates 3 at the corner are connected to close the corner; in order to meet the effect of buffering the expansion difference between the first folding plate 5 and the second folding plate 6, there is a set distance between the end of the second folding plate 6 in the vertical direction and the adjacent first folding plate 5, and the closing member 21 connects the first folding plate 5 and the second folding plate 6;

[0046] A plurality of connecting plates 3 at the same height on each side are provided with an I-shaped rigid beam 4 on one side away from the inner side of the peripheral cavity, and a connecting assembly is provided at the four corners of the four rigid beams 4 at the same height, and the connecting assembly includes an angle plate 9, a first plate 10, a second plate 11, a third plate 13 and a fourth plate 14, wherein the angle plate 9 is respectively connected to the two connecting plates 3 at the corners, one end of the first plate 10 and the second plate 11 are hinged to the angle plate 9, and the other ends of the first plate 10 and the second plate 11 are respectively hinged to the third plate 13 and the fourth plate 14, and the other ends of the third plate 13 and the fourth plate 14 are respectively connected to the two rigid beams 4 at the corners. Specifically, the angle plate 9 and the connecting plate 3 The shapes at the corners are adapted, that is, the angle plate 9 has two connecting ends, which are respectively connected to the two connecting plates 3 at the corners, and the other end of the angle plate 9 away from the two connecting ends is hinged with the first plate 10 and the second plate 11 respectively, and the other end of the first plate 10 and the second plate 11 away from the angle plate 9 is hinged with the third plate 13 and the fourth plate 14 respectively, and the third plate 13 and the fourth plate 14 are respectively connected to the two rigid beams 4 at the corners. By designing such a connecting assembly, the flue gas pressure inside the evaporator can be transmitted to the rigid beam 4 through the guard plate 2, the longitudinal reinforcement ribs 8, and the plate hook 7, so that the rigid beam 4 bears these forces, and the force bearing and transmission are reasonable; it should be noted that the drawings in the specification of the utility model are only schematic diagrams of principles, Figure 1 The rigid beams, connecting components and other structures in the main viewing direction are not drawn;

[0047] Among them, due to the inclined arrangement of the first folding plate 5 and the second folding plate 6, in the actual assembly process, there are gaps between the first folding plate 5, the second folding plate 6, the longitudinal reinforcing ribs 8, the cross-connection of the guard plate 2, and the connecting plate 3 and the guard plate 2 at the corners. These gaps will cause gas leakage in the evaporator flue, so it is necessary to close these gaps. In actual assembly, only the gaps need to be closed. Therefore, the structure for closing the gaps can be selected and assembled according to actual conditions to achieve the effect of closing the connections of the peripheral cavity. The utility model does not limit this.

[0048] In the above technical scheme, when in use, the flue gas from the furnace 12 and the horizontal flue 17 enters the evaporator flue through the flue gas inlet, and then flows out from the flue gas outlet after passing through the evaporator tube group 1. In this process, the flue inlet temperature is higher and the outlet temperature is lower, so that the guard plate 2 of the evaporator flue has an expansion difference between the upper and lower parts, and the guard plate 2 is designed to be connected with the connecting plate 3 and the longitudinal reinforcing rib 8 as a folding plate, that is, in the utility model, the guard plate 2 is connected with the connecting plate 3 and the longitudinal reinforcing rib 8 respectively through the first folding plate 5 and the second folding plate 6. The folding angle formed by the first folding plate 5 and the second folding plate 6 buffers the expansion difference caused by the thermal expansion of the guard plate 2. Compared with the form of directly welding the guard plate 2 to the longitudinal reinforcing rib 8 / connecting plate 3, the utility model can effectively improve the tearing caused by the thermal expansion of the guard plate 2 during long-term use through the folding plate connection, and avoids the situation that the structure is larger at the top and smaller at the bottom due to the upper and lower expansion difference, thereby improving the use effect and service life of the evaporator flue.

[0049] In another technical solution, the connecting plate 3 includes a vertical plate 301 and a pair of support plates 302 respectively arranged near the top and bottom of the vertical plate 301, the vertical plate 301 and the guard plate 2 are located in the same vertical plane, the pair of support plates 302 are both arranged on the side wall of the vertical plate 301 away from the inner part of the peripheral cavity, and the free end of the first folding plate 5 is connected to the middle part of the support plate 302 corresponding to the connecting plate 3; the beneficial effect obtained by adopting this technical solution is that a structure of a connecting plate 3 is provided, which is convenient for installing the first folding plate 5 and the second folding plate 6 while saving space, and is convenient for the evaporator tube group 1 to be close to the connecting plate 3, which is helpful for heat dissipation.

[0050] In another technical solution, the connecting assembly includes a corner plate 9, a first plate 10, a second plate 11, a third plate 13, and a fourth plate 14. The corner plate 9 is respectively connected to the vertical plates 301 of the two connecting plates 3 at the corners, one end of the first plate 10 and the second plate 11 are hinged to the corner plate 9, and the other ends of the first plate 10 and the second plate 11 are respectively hinged to the third plate 13 and the fourth plate 14, and the other ends of the third plate 13 and the fourth plate 14 are respectively connected to the two rigid beams 4 at the corners; when using this technical solution, the pressure in the evaporator flue 20 may be positive pressure or negative pressure, and both positive and negative pressures act directly on the guard plate 2, and the guard plate 2 transfers the pressure to the connecting plate 3, and the connecting plate 3 transfers the positive or negative pressure load inside the evaporator flue 20 to the rigid beam 4 through the plate hook 7, and finally the rigid beam 4 bears the force, and the force transmission and force bearing are more reasonable.

[0051] In another technical solution, the vertical plates 301 of the two connecting plates 3 at the corners are welded, and the two guard plates 2 at the corners are connected by guard plate connectors, and the guard plate connectors include an L-shaped plate 15 arranged in the vertical direction, the right-angle end of the L-shaped plate 15 is close to the corner and the two guard plates at the corner correspond to the two plate bodies of the L-shaped plate 15, and the two guard plates 2 at the corners are provided with a third folding plate 22, and the free end of the third folding plate 22 is connected to the corresponding L-shaped plate 15 plate body, so that the guard plate 2 and the corresponding L-shaped plate 15 plate body form an angle connection; wherein the top and bottom ends of the L-shaped plate 15 are respectively connected to the two connecting plates 3 at the corresponding corners;

[0052] In the above technical solution, the guard plate connector is used to connect the two guard plates 2 at the corner. The guard plate connector is an L-shaped plate 15, and the right-angle end of the L-shaped plate 15 faces the inside of the peripheral cavity (that is, close to the inside of the peripheral cavity). The two plate bodies of the L-shaped plate 15 correspond to the two guard plates 2 at the corner. There is a set distance between the two guard plates 2 at the corner and the plate bodies of the corresponding L-shaped plates 15. Each guard plate 2 at the corner is provided with an inclined third folding plate 22, and the end of the third folding plate 22 away from the guard plate 2 is welded to the middle part of the plate body of the corresponding L-shaped plate 15, that is, the guard plate 2 at the corner is also connected with the L-shaped plate 15 at an angle (such as Figure 8 As shown, Figure 8 2 is a top view of the connection structure between the two guard plates and the L-shaped plate at the corner). This connection form can also buffer the expansion difference caused by the thermal expansion of the guard plate 2 at this location;

[0053] Among them, an L-shaped space is formed between the two connecting plates 3 at the corner, and the L-shaped plate 15 is adapted to the size of the L-shaped space, so that the L-shaped plate 15 near the end is welded to the two connecting plates 3 at the corner where the L-shaped space is located. Specifically, the two plate bodies of the L-shaped plate 15 are respectively welded to the support plates 302 of the two connecting plates 3 at the corner, and the right-angle end of the L-shaped plate 15 is welded to the connection between the vertical plates 301 of the two connecting plates 3;

[0054] More specifically, in this technical solution, there is a certain distance between the end of the second folding plate 6 and the bottom of the first folding plate 5 (the bottom refers to the connection between the second folding plate 6 and the guard plate 2), and correspondingly, there is a certain distance between the end of the third folding plate 22 close to the first folding plate 5 and the first folding plate 5; due to the existence of the first folding plate 5, the second folding plate 6, and the third folding plate 22, the expansion difference caused by the heat of the guard plate can be buffered, but during the assembly process, a gap is generated at the intersection of the first folding plate 5, the second folding plate 6, the guard plate 2 and the longitudinal reinforcement rib 8, and a gap is generated at the intersection of the first folding plate 5, the third folding plate 22, the guard plate 2 and the L-shaped plate 15, which needs to be closed. Here, a structure of a closing member 21 for closing the gap is provided: Figure 5 , Fig. 9 as well as Figures 11-12As shown, the design principle of the closing member 21 is to make its shape match the spatial shape of the intersection, and the corresponding part is welded with the corresponding component. For example, the structure of the closing member 21 can be, including a fifth plate 2101, a sixth plate 2102 and an intermediate plate 2103 connecting the fifth plate 2101 and the sixth plate 2102. The closing member 21 is formed in one piece. When it is applied to the intersection of the first folding plate 5, the second folding plate 6 and the longitudinal reinforcing rib 8 and the guard plate 2, the fifth plate 2101 fits with the inclined surface shape of the first folding plate 5 and is welded to the first folding plate 5, the sixth plate 2102 fits with the end face of the second folding plate 6 close to the first folding plate 5 and is welded on the end face, the intermediate plate 2103 connects the fifth plate 2101 and the sixth plate 2102, and the intermediate plate 2103 is welded to the guard plate 2 near the side wall of the guard plate 2, and the fifth plate 2101 1. The side walls of the middle plate 2103 and the sixth plate 2102 close to the longitudinal reinforcing rib 8 (i.e., the side walls of the closing piece 21 close to the longitudinal reinforcing rib 8) are welded to the longitudinal reinforcing rib 8 to achieve closure. Similarly, when the closing piece 21 is applied to the cross-connection of the guard plate 2, the third folding plate 22, the L-shaped plate 15 and the first folding plate 5 at the corner, the fifth plate 2101 is fitted with the inclined surface of the first folding plate 5 and welded to the first folding plate 5, the sixth plate 2102 is fitted with the end surface of the third folding plate 22 close to the first folding plate 5 and welded on the end surface, the middle plate 2103 is welded to the guard plate 2 and connected to the first folding plate 5 and the third folding plate 22, and the side wall of the closing piece 21 close to the L-shaped plate 15 is welded to the L-shaped plate 15 to achieve closure; it should be noted that in actual use, the design and selection should be carried out according to the actual situation, and the closure effect can be achieved;

[0055] The beneficial effect obtained by adopting this technical solution is that, by designing the L-shaped plate 15 and the third folding plate 22, a connection method for the two guard plates 2 at the corners is provided, so that when the entire evaporator flue 20 expands due to heat, the guard plates 2 at the corners can better withstand the expansion difference caused by the heat, thereby improving the heat resistance of the entire evaporator flue 20 and preventing the guard plates 2 from being torn.

[0056] In another technical solution, the side wall of the longitudinal reinforcing rib 8 close to the inner part of the peripheral cavity is flush with the guard plate 2 on the same side, and the second folding plate 6 is connected to the middle part of the side wall close to the longitudinal reinforcing rib 8. Specifically, Fig.10 As shown, the side wall of the longitudinal reinforcing rib 8 located in the peripheral cavity is flush with the side wall of the guard plate 2 located in the peripheral cavity; the beneficial effect obtained by adopting this technical solution is that the longitudinal reinforcing rib 8 is flush with the side wall of the guard plate 2 in the peripheral cavity, which makes it convenient for the evaporator tube group 1 to be close to the guard plate 2 and the longitudinal reinforcing rib 8, which not only saves installation space but also facilitates heat dissipation.

[0057] In another technical solution, a plurality of pairs of relative plate hooks 7 are provided on both side walls of each longitudinal stiffener 8 along the horizontal direction from top to bottom, and the plurality of pairs of plate hooks 7 correspond one-to-one to the plurality of rigid beams 4 located on the same side of the longitudinal stiffener 8, and the hook ends of each pair of plate hooks 7 are respectively hooked on a pair of flange plates of the corresponding rigid beam 8, and the other end is connected to the longitudinal stiffener 8; the beneficial effect obtained by adopting this technical solution is that, by designing the plate hooks 7, the connection effect between the guard plate 2 and the rigid beam 4 is made more stable.

[0058] In another technical solution, an ash hopper 16 is further included, and the ash hopper 16 is arranged below the peripheral cavity and connected to the peripheral cavity; specifically, the ash hopper 16 is an existing structure, and the connection structure between the ash hopper 16 and the peripheral cavity is as follows: Figures 1-2 as well as Figure 6 As shown, the ash hopper 16 is located below the peripheral cavity, the ash hopper ring beam 1602 is arranged on the outer side of the lower part of the peripheral cavity, and the ash hopper 16 guard plate 1601, the peripheral cavity guard plate 2 and the longitudinal reinforcement rib 8 are all connected to the ash hopper ring beam 1602; the use of this technical solution has the beneficial effect that, by setting up the ash hopper 16, the ash hopper 16 can accommodate the dust falling in the evaporator flue, and at the same time, the ash hopper 16 can be suspended to the boiler steel structure top plate 18 with the help of the longitudinal reinforcement rib 8 (the ash hopper 16's own weight and the ash weight are transferred to the longitudinal reinforcement rib 8).

[0059] In another technical solution, an expansion joint 19 is provided at the flue gas outlet; specifically, the expansion joint 19 is a structure well known to those skilled in the art, and the evaporator flue 20 is flange-welded and connected to the expansion joint 19 at the flue outlet. The expansion joint 19 can absorb the misalignment caused by the inconsistency between the expansion amount of the evaporator flue 20 and the expansion amount of the outlet flue at the rear of the expansion joint.

[0060] The waste heat boiler is used for incinerating domestic waste, including the above-mentioned domestic waste incineration vertical waste heat boiler evaporator flue 20 structure. According to the actual situation, the furnace 12, the horizontal flue 17, the economizer and other structures are adaptively designed to assemble to form a waste heat boiler. During the long-term operation of the waste heat boiler with the evaporator flue 20 structure, the protective plate 2 of the evaporator flue 20 is not easily cracked by heat, so that the service life of the evaporator flue 20 is improved.

[0061] The number of equipment and processing scale described here are used to simplify the description of the utility model. The application, modification and variation of the evaporator flue of the vertical waste heat boiler for incineration of domestic waste of the utility model are obvious to those skilled in the art.

[0062] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A flue structure of an evaporator of a vertical waste heat boiler for incineration of domestic waste, comprising four vertical enclosure assemblies arranged along four sides of a square, the four enclosure assemblies being connected in sequence to form an outer cavity, an evaporator tube group being arranged in the outer cavity, and a smoke inlet and a smoke outlet being arranged on the outer cavity along the direction of the smoke; each enclosure assembly comprises a plurality of composite plates arranged at intervals in the horizontal direction, longitudinal reinforcing ribs arranged between two adjacent composite plates, and a plurality of I-shaped rigid beams, each composite plate comprises a plurality of guard plates arranged at intervals from top to bottom in sequence, and a connecting plate arranged between two adjacent guard plates, a rigid beam is arranged outside a plurality of connecting plates at the same height on each side, each rigid beam is connected to a plurality of longitudinal reinforcing ribs on the same side by a plurality of plate hooks, and a connecting assembly is arranged at the four corners of the four rigid beams at the same height to connect the two rigid beams at the corners, characterized in that: The end of the connecting plate close to the longitudinal reinforcing rib is connected to the side wall of the longitudinal reinforcing rib; In the vertical direction, a first folding plate is connected between the end of each connecting plate and the adjacent guard plate, so that an angle connection is formed between the connecting plate and the guard plate; In the horizontal direction, a second folding plate is connected between the side wall of each longitudinal reinforcing rib and the adjacent guard plate, so that an angle connection is formed between the longitudinal reinforcing rib and the guard plate; Among them, each connection of the peripheral cavity is closed.

2. The flue structure of the evaporator of the vertical waste heat boiler for incineration of domestic waste as claimed in claim 1 is characterized in that: The connecting plate includes a vertical plate and a pair of support plates respectively arranged near the top and bottom of the vertical plate. The vertical plate and the guard plate are located in the same vertical plane. The pair of support plates are both arranged on the side wall of the vertical plate away from the inner part of the peripheral cavity. One end of the first folding plate is connected to the guard plate, and the other end is connected to the middle part of the support plate of the adjacent connecting plate.

3. The flue structure of the evaporator of the vertical waste heat boiler for incineration of domestic waste as claimed in claim 2 is characterized in that: The connecting assembly includes a corner plate, a first plate, a second plate, a third plate, and a fourth plate. The corner plates are respectively connected to the vertical plates of the two connecting plates at the corners. One end of the first plate and the second plate are hinged to the corner plate. The other ends of the first plate and the second plate are respectively hinged to the third plate and the fourth plate. The other ends of the third plate and the fourth plate are respectively connected to the two rigid beams at the corners.

4. The flue structure of the evaporator of the vertical waste heat boiler for incineration of domestic waste as claimed in claim 2, characterized in that: The vertical plates of the two connecting plates at the corners are welded, and the two guard plates at the corners are connected by guard plate connectors, and the guard plate connectors include an L-shaped plate arranged in the vertical direction, and the right-angle end of the L-shaped plate is close to the corner and the two guard plates at the corner correspond to the two plate bodies of the L-shaped plate, and the two guard plates at the corners are provided with a third folding plate, and the free end of the third folding plate is connected to the corresponding L-shaped plate body, so that the guard plate and the corresponding L-shaped plate body form an angled connection; Wherein, the top end and the bottom end of the L-shaped plate are respectively connected to two connecting plates at corresponding corners.

5. The flue structure of the evaporator of the vertical waste heat boiler for incineration of domestic waste as claimed in claim 4, characterized in that: The side wall of the longitudinal reinforcing rib close to the inner part of the peripheral cavity is flush with the guard plate on the same side, one end of the second folding plate is connected to the guard plate, and the other end is connected to the middle part of the side wall close to the longitudinal reinforcing rib.

6. The flue structure of the evaporator of the vertical waste heat boiler for incineration of domestic waste as claimed in claim 1, characterized in that: Each longitudinal stiffener is provided with a plurality of pairs of opposing plate hooks from top to bottom on both side walls along the horizontal direction, and the plurality of pairs of plate hooks correspond one-to-one to a plurality of rigid beams located on the same side of the longitudinal stiffener. The hook ends of each pair of plate hooks are respectively hooked on a pair of flange plates of the corresponding rigid beam, and the other end is connected to the longitudinal stiffener.

7. The flue structure of the evaporator of the vertical waste heat boiler for incineration of domestic waste as claimed in claim 1, characterized in that: It also includes an ash discharge hopper, which is arranged below the peripheral cavity and connected to the peripheral cavity.

8. The flue structure of the evaporator of the vertical waste heat boiler for incineration of domestic waste as claimed in claim 1, characterized in that: An expansion joint is arranged at the smoke outlet.

9. Waste heat boiler, used for burning domestic waste, characterized in that: It comprises the flue structure of an evaporator of a vertical waste heat boiler for incinerating domestic waste as described in any one of claims 1 to 8.

Images