Tubular heat exchanger and boiler air and smoke system

Abstract

The utility model relates to the technical field of boiler air and smoke, in particular to a tubular heat exchanger and a boiler air and smoke system. Comprising two sets of connecting blocks, an air inlet pipe and a smoke inlet pipe are fixed to the surface of one set of connecting blocks, a smoke outlet pipe and an air outlet pipe are fixed to the surface of the other set of connecting blocks, an inner pipe is arranged on the inner wall of an outer pipe, and a filter plate is arranged on the inner wall of the end, close to the air inlet pipe, of the inner pipe. The spiral drainage blocks play a role in guiding high-temperature air smoke and cold air, the high-temperature air smoke is cooled more evenly, high-efficiency cooling of the high-temperature air smoke is achieved, meanwhile, the reinforcing blocks are fixed to the surfaces of the end openings of the outer pipe and the inner pipe and made of stainless steel, the heat exchange pipe is prevented from being corroded by low temperature, the filter plate is arranged on the air inlet, and therefore the heat exchange effect is improved. The inner pipe is prevented from being blocked by impurities doped in the cold air, so that the energy consumption of the blower is prevented from increasing.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler wind and smoke technical field, concretely is a tubular heat exchanger and boiler wind and smoke system. BACKGROUND

[0002] The boiler is a kind of energy conversion equipment, and the energy input into the boiler includes chemical energy in fuel and electric energy, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy.

[0003] In the prior art, the boiler is a common energy conversion equipment, which is widely used in energy field, chemical field and pharmaceutical field, etc., the surface temperature of the boiler is increased by burning fuel in the boiler, the surface with increased temperature heats liquid to boiling to generate water vapor, so as to realize energy conversion, and the high-temperature flue gas generated during the combustion of the boiler is cooled by the heat exchanger and then discharged.

[0004] However, the existing boiler generally adopts rotary three-division air heat exchanger, when in winter, due to the overall low average temperature in winter, the comprehensive temperature of the cold end of the heat exchanger is low, which causes the low-temperature corrosion of the cold end of the heat exchanger to be intensified, and long-time operation causes the pollution of the heat exchange element, so that the energy consumption of the air supply fan is increased, and the thermal efficiency and economy of the boiler are affected. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a tubular heat exchanger and boiler wind and smoke system to solve the problems in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a tubular heat exchanger, the tubular heat exchanger comprises:

[0007] The connecting block is provided with two groups, one group of the connecting block surface is fixed with the air inlet pipe and the smoke inlet pipe, and the other group of the connecting block surface is fixed with the smoke outlet pipe and the air outlet pipe;

[0008] The outer tube is provided with the inner tube on the inner wall, and the inner tube is provided with the filter plate on the end wall of the air inlet pipe.

[0009] Preferably, the connecting block is fixed with the reinforcing block on the surface of the outer tube, the length of the outer tube is the same as the length of the inner tube, two groups of the connecting block are arranged on the surface of the outer tube at both ends, the air inlet pipe is provided with the control valve on the inner wall, the outer tube is fixed with the drainage block on the inner wall, and the drainage block is spiral.

[0010] Preferably, the drainage block on the inner wall of the outer tube is located in the outer tube cavity between the outer tube and the inner tube, and the inner tube is fixed with the drainage block on the outer surface.

[0011] The inner tube cavity inner wall surface of the inner tube is fixed with a drainage block, and the filter plate inner wall is fixed with a steel ring.

[0012] Preferably, the reinforcing blocks are ring-shaped, and a plurality of groups of reinforcing blocks are arranged on the inner and outer surfaces of the outer tube and the inner tube.

[0013] Preferably, the smoke inlet pipe is fan-shaped, the axes of the air inlet pipe and the smoke inlet pipe correspond to each other, the inner diameter of the smoke inlet pipe is greater than the outer diameter of the air inlet pipe, and the air inlet pipe, the smoke inlet pipe, the air outlet pipe and the smoke outlet pipe are symmetrically distributed.

[0014] A boiler air and smoke system comprises the tubular heat exchanger.

[0015] Compared with the prior art, the boiler air and smoke system has the advantages that:

[0016] The cold air reduces the temperature of the inner tube surface, thereby reducing the temperature of the high-temperature air and smoke in the outer tube cavity, the spiral-shaped drainage blocks guide the high-temperature air and smoke, and the high-temperature air and smoke are uniformly cooled, thereby achieving high efficiency of the high-temperature air and smoke cooling, the reinforcing blocks made of stainless steel are arranged on the surfaces of the outer tube and the inner tube, the reinforcing blocks prevent the heat exchange pipe from being corroded by low temperature, the filter plate is arranged on the air inlet, the filter plate prevents impurities in the cold air from blocking the inner tube, and the air blower energy consumption is prevented from being increased. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure perspective view of the utility model;

[0018] Figure 2 It is a heat exchange pipe structure perspective view of the utility model;

[0019] Figure 3 It is a connecting block structure perspective view of the utility model;

[0020] Figure 4 It is an outer tube structure perspective view of the utility model;

[0021] Figure 5 It is an inner tube structure perspective view of the utility model;

[0022] Figure 6 It is a filter plate structure perspective view of the utility model;

[0023] Figure 7 It is a position distribution diagram of the tubular heat exchanger in the boiler air and smoke system flow.

[0024] In the figure: 1, control valve; 2, air inlet pipe; 3, smoke inlet pipe; 4, connecting block; 5, outer pipe; 6, smoke outlet pipe; 7, air outlet pipe; 8, outer pipe cavity; 9, inner pipe; 10, filter plate; 11, reinforcing block; 12, drainage block; 13, inner pipe cavity; 14, steel ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme of the utility model clearly, completely describe, and the advantage is more clear and obvious, the following combining with the figure to the utility model embodiment carries out further detailed explanation.Should understand, the specific embodiment described here is the utility model part embodiment, instead of all the embodiment, only use to explain the utility model embodiment, and does not use to limit the utility model embodiment, the ordinary skill in the art of all other embodiments obtained under the premise of not making the creative labor, all belong to the utility model protection range.

[0026] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; It can be mechanical connection, or electrical connection; It can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by referring to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that these embodiments can not be limited to these specific details in practice for ordinary skilled in the art. In some examples, well-known methods and structures are not described in detail to avoid unnecessary difficulty in understanding these embodiments. In addition, all embodiments can be used in combination with each other.

[0029] Please refer to Figures 1 to 7This utility model provides a technical solution: a tubular heat exchanger and a boiler flue gas system.

[0030] In the first embodiment, the connecting block 4 is provided in two sets. One set of connecting block 4 is fixed with an air inlet pipe 2 and a smoke inlet pipe 3. First, the high-temperature smoke is sent into the outer pipe cavity 8 through the smoke inlet pipe 3. At the same time, the fan is started to send cold air into the inner pipe cavity 13 through the air inlet pipe 2. The cold air will reduce the temperature of the inner pipe 9 surface, thereby reducing the temperature of the high-temperature smoke in the outer pipe cavity 8. The other set of connecting block 4 is fixed with a smoke outlet pipe 6 and an air outlet pipe 7.

[0031] The inner wall of the outer pipe 5 is provided with an inner pipe 9. The inner wall of the inner pipe 9 near the end of the air inlet pipe 2 is provided with a filter plate 10. The air inlet is provided with a filter plate 10 to prevent impurities in the cold air from causing blockage of the inner pipe, thereby preventing the energy consumption of the blower from increasing. At the same time, a steel ring 14 is provided inside the filter plate 10 to prevent strong winds from damaging the filter plate 10.

[0032] Based on Example 1, in order to achieve high efficiency in cooling the high-temperature flue gas of the boiler, a reinforcing block 11 is fixed to the surface of the outer tube 5 of the connecting block 4. The length of the outer tube 5 is the same as the length of the inner tube 9. Two sets of connecting blocks 4 are provided on the surfaces of both ends of the outer tube 5. A control valve 1 is provided on the inner wall of the air inlet pipe 2. A diversion block 12 is fixed on the inner wall of the outer tube 5. The diversion block 12 is spiral in shape.

[0033] The drainage block 12 on the inner wall of the outer tube 5 is located in the outer tube cavity 8 between the outer tube 5 and the inner tube 9, and the drainage block 12 is fixed on the outer surface of the inner tube 9.

[0034] The drainage block 12 on the outer surface of the inner tube 9 corresponds to the drainage block 12 on the inner wall of the outer tube 5. The drainage block 12 is fixed on the inner wall surface of the inner tube cavity 13 in the inner tube 9, and the steel ring 14 is fixed on the inner wall of the filter plate 10.

[0035] The reinforcing block 11 is ring-shaped, and multiple sets of reinforcing blocks 11 are provided. The reinforcing blocks 11 are fixed on the inner and outer surfaces of the outer tube 5 and the inner and outer surfaces of the inner tube 9.

[0036] The smoke inlet pipe 3 is fan-shaped, and the axes of the air inlet pipe 2 and the smoke inlet pipe 3 correspond to each other. The inner diameter of the smoke inlet pipe 3 is larger than the outer diameter of the air inlet pipe 2. The air inlet pipe 2, the smoke inlet pipe 3, the air outlet pipe 7, and the smoke outlet pipe 6 are symmetrically distributed.

[0037] In actual use, when the boiler flue gas is cooled, the high-temperature flue gas is first sent into the outer tube cavity 8 through the flue gas inlet pipe 3, and the fan is started to send cold air into the inner tube cavity 13 through the air inlet pipe 2, so that the temperature of the inner tube 9 surface is reduced, the temperature of the high-temperature flue gas in the outer tube cavity 8 is reduced, and because the outer tube 5 and the inner tube 9 are provided with the flow guide block 12, the spiral flow guide block plays a guiding role on the high-temperature flue gas and the cold air, and the high-temperature flue gas is more uniformly cooled, so that the high efficiency of the high-temperature flue gas cooling is realized, and the outer tube 5 and the inner tube 9 are both fixed with the reinforcing block 11, the reinforcing block 11 is made of stainless steel, which prevents the heat exchange pipe from being corroded by low temperature, and the air inlet is provided with the filter plate 10, which prevents the inner tube from being blocked by impurities in the cold air, so as to prevent the air supply fan from increasing the energy consumption, and the filter plate 10 is provided with the steel ring 14 inside, which prevents the filter plate 10 from being damaged by strong wind, and the control valve 1 can control the flow and flow rate of the cold air, so as to realize the effect of controlling the flue gas temperature.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A tube heat exchanger, characterized by: The pipe heat exchanger comprises: The connecting block (4) is provided with two groups, one group of the connecting block (4) is fixed with the air inlet pipe (2) and the smoke inlet pipe (3) on the surface, and the other group of the connecting block (4) is fixed with the smoke outlet pipe (6) and the air outlet pipe (7) on the surface; The outer pipe (5) is provided with the inner pipe (9) on the inner wall, the filter plate (10) is arranged on the end inner wall of the air inlet pipe (2) of the inner pipe (9), the connecting block (4) is fixed with the reinforcing block (11) on the surface of the outer pipe (5), the length of the outer pipe (5) is the same as the length of the inner pipe (9), the two groups of connecting blocks (4) are arranged on the surfaces of the two ends of the outer pipe (5), the control valve (1) is arranged on the inner wall of the air inlet pipe (2), the drainage block (12) is fixed on the inner wall of the outer pipe (5), the drainage block (12) is in a spiral shape, the drainage block (12) on the inner wall of the outer pipe (5) is located in the outer pipe cavity (8) between the outer pipe (5) and the inner pipe (9), and the drainage block (12) is fixed on the outer surface of the inner pipe (9).

2. A tubular heat exchanger according to claim 1, characterised in that: The drainage block (12) on the outer surface of the inner pipe (9) corresponds to the drainage block (12) on the inner wall of the outer pipe (5), the drainage block (12) is fixed on the inner wall surface of the inner pipe cavity (13) in the inner pipe (9), and the steel ring (14) is fixed on the inner wall of the filter plate (10).

3. A tubular heat exchanger according to claim 1, characterised in that: The reinforcing block (11) is in a ring shape, the reinforcing block (11) is provided with multiple groups, and the reinforcing block (11) is fixed on the inner and outer surfaces of the outer pipe (5) and the inner and outer surfaces of the inner pipe (9).

4. A tubular heat exchanger according to claim 1, characterized in that: The smoke inlet pipe (3) is in a fan shape, the shaft centers of the air inlet pipe (2) and the smoke inlet pipe (3) correspond to each other, the inner diameter of the smoke inlet pipe (3) is greater than the outer diameter of the air inlet pipe (2), and the air inlet pipe (2), the smoke inlet pipe (3), the air outlet pipe (7) and the smoke outlet pipe (6) are symmetrically distributed.

5. A boiler air and flue gas system characterized by: The pipe heat exchanger comprises: The pipe heat exchanger comprises:

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