Condenser smoke sealing structure for natural gas fired boiler

Abstract

The condenser smoke sealing structure comprises a condenser shell, a smoke inlet is formed in the upper end of the condenser shell, a corresponding smoke outlet is formed in the lower end of the condenser shell, and supporting steel plates on the left side and the right side extend downwards from the smoke inlet in the condenser shell. The supporting steel plates extend downwards to the position of the smoke outlet to be fixed, so that a smoke channel is formed in the supporting steel plates on the two sides and the sealing housing, and a cavity is formed between the supporting steel plates on the left side and the right side and the left side wall and the right side wall of the sealing housing. According to the overall sealing structure of the device, a sealing area is formed by arranging the sealing cover shell inside, instead of a smoke sealing area formed by supporting steel plates on the two sides, so that the supporting steel plates and the coiled pipe do not need to be welded and fixed, and only the upper ends and the lower ends of the supporting steel plates need to be welded; the manufacturing process of the whole structure is greatly shortened, difficulty is reduced, and the welding process is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of condensers of natural gas-fired boilers, in particular to a flue gas sealing structure of a condenser used in natural gas-fired boilers. Background Art

[0002] With small coal-fired boilers being phased out of the market, natural gas-fired boilers are increasingly popular. To improve efficiency, natural gas-fired boilers are equipped with a condenser at the rear end to reduce exhaust gas temperatures to 50-60°C. However, this produces a significant amount of condensate, which, if not promptly drained, can damage the condenser tubes.

[0003] like Figure 4 As shown, the flue gas sealing mechanism of the existing condenser is mainly sealed by welding a serpentine tube and a supporting steel plate. This sealing method is not only difficult to weld and labor-intensive, but also prone to welding leaks, resulting in the flue formed by the supporting steel plate not being sealed, and the flue gas leaking into the cavities at both ends; and when the boiler is running, water often leaks out of the cavity. At the same time, because it is impossible to determine whether it is condensed water in the flue gas or boiler feed water in the serpentine tube, the boiler must be stopped for inspection every time, and the structural design is very unreasonable.

[0004] Therefore, in order to solve the above problems, it is necessary to develop a condenser flue gas sealing structure for a natural gas-fired boiler with a reasonable structure and good sealing effect. Utility Model Content

[0005] The purpose of this utility model is to address the deficiencies in the prior art and provide a condenser flue gas sealing structure for a natural gas fired boiler. The technical solution is as follows:

[0006] A condenser flue gas sealing structure for a natural gas-fired boiler comprises a condenser shell, wherein the upper end of the condenser shell is provided with a smoke inlet, and the lower end is provided with a corresponding smoke outlet, and left and right support steel plates are provided downwardly from the smoke inlet position in the condenser shell, and the support steel plates are extended downwardly to the smoke outlet position and fixed, thereby forming a smoke channel in the support steel plates on both sides and the sealing cover shell, and a cavity is formed between the left and right support steel plates and the left and right side walls of the sealing cover shell, and a sealing cover shell is further provided on the inner wall of the condenser shell, thereby forming a sealed area in the cavities on both sides;

[0007] A water inlet pipe is provided at the lower end of the condenser shell, a water outlet pipe is provided at the upper end, and a serpentine pipe connected to the water inlet pipe and the water outlet pipe is also provided inside the condenser shell. The serpentine pipe passes through the supporting steel plate and extends horizontally into the flue gas channel, and the two ends of the serpentine pipe remain in the cavity accordingly.

[0008] Furthermore, the upper and lower ends of the support steel plate are correspondingly welded and fixed to the smoke inlet and the smoke outlet;

[0009] Furthermore, the support steel plate is provided with corresponding through-holes, and the serpentine tube passes through the corresponding through-holes and is supported by the support steel plate. The serpentine tube and the support steel plate are not welded and fixed.

[0010] Furthermore, after the smoke enters the smoke channel from the smoke inlet, the smoke may enter the cavity areas on both sides from the perforations accordingly, and condensed water may be precipitated in the cavity areas.

[0011] Furthermore, a water outlet is provided at the lower end of the supporting steel plate, and condensed water generated in the cavity enters the smoke outlet from the position of the water outlet.

[0012] Furthermore, sealing inclined plates are provided at the bottom of the cavities on both sides; the provision of the sealing inclined plates allows the condensed water in the cavity to flow smoothly into the smoke outlet, and the structural setting is reasonable.

[0013] Furthermore, the serpentine tube is also provided with heat exchange fins; the heat exchange fins on the serpentine tube can effectively increase the heat exchange efficiency of the serpentine tube.

[0014] Beneficial effects: The utility model has the following beneficial effects:

[0015] 1) The overall sealing structure of the device forms a sealed area by setting a sealed cover inside, rather than forming a smoke sealing area by the support steel plates on both sides. Therefore, there is no need to weld the support steel plates to the serpentine pipe. Only the upper and lower ends of the support steel plates need to be welded. The manufacturing process of the overall structure is greatly shortened, the difficulty is reduced, and the welding process is simple;

[0016] 2) This device forms a sealed area through a sealed cover, effectively improving the sealing effect;

[0017] 3) In this device, a drain port is provided at the lower end of the supporting steel plate, and a sealing inclined plate is provided at the lower end of the cavity to facilitate the discharge of condensed water in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the structural diagram of the utility model;

[0019] Figure 2 for Figure 1 Middle AA section view;

[0020] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0021] Figure 4 This is a diagram of the condenser flue gas sealing structure in the prior art;

[0022] Among them, the condenser shell 1; the smoke outlet 2; the smoke inlet 3; the supporting steel plate 4; the smoke channel 5; the cavity 6; the sealing cover 7; the water inlet pipe 8; the water outlet pipe 9; the serpentine pipe 10; the perforation 11; the water outlet 12; the sealing inclined plate 13; and the heat exchange fins 14. DETAILED DESCRIPTION

[0023] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solutions of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0024] like Figure 1 、 Figure 2 and Figure 3 As shown, a condenser flue gas sealing structure for a natural gas-fired boiler includes a condenser shell 1, a smoke outlet 2 is provided at the lower end of the condenser shell, and a corresponding smoke inlet 3 is provided at the upper end. Left and right support steel plates 4 are provided downwardly from the smoke inlet 3 in the condenser shell 1. The support steel plates 4 extend downwardly to the smoke outlet 2 and are fixed thereto, thereby forming a smoke channel 5 in the support steel plates 4 on both sides and a sealing cover 7. A cavity 6 is formed between the left and right support steel plates 4 and the left and right side walls of the sealing cover 7. A sealing cover 7 is further provided on the inner wall of the condenser shell 1, thereby forming a sealed area at the cavity 6 on both sides.

[0025] A water inlet pipe 8 is provided at the lower end of the condenser shell 1, and a water outlet pipe 9 is provided at the upper end. A serpentine tube 10 connected to the water inlet pipe 8 and the water outlet pipe 9 is also provided inside the condenser shell 1. The serpentine tube 10 passes through the supporting steel plate 4 and extends horizontally into the flue gas channel 5, and the two ends of the serpentine tube 10 remain in the cavity 6 accordingly.

[0026] The upper and lower ends of the supporting steel plate 4 are correspondingly welded and fixed to the smoke inlet 2 and the smoke outlet 3;

[0027] The supporting steel plate 4 is provided with corresponding through-holes 11 , and the serpentine tube 10 passes through the corresponding through-holes 11 and is supported by the supporting steel plate 4 . The serpentine tube 10 and the supporting steel plate 4 are not welded and fixed.

[0028] After the smoke enters the smoke channel 5 from the smoke inlet 3 , the smoke can enter the cavity 6 areas on both sides through the perforations 11 accordingly, and condensed water is precipitated in the cavity 6 areas.

[0029] A water outlet 12 is further provided at the lower end of the supporting steel plate 4 , and the condensed water generated in the cavity 6 enters the smoke outlet 2 from the position of the water outlet 12 .

[0030] Sealing inclined plates 13 are provided at the bottom of the cavities 6 on both sides; and heat exchange fins 14 are provided on the serpentine tubes 10 .

[0031] Compared with the prior art, the technical solution of the present device is that the supporting steel plate is designed to be welded and fixed at the upper and lower ends, while the corresponding serpentine tube passing through the perforation is not welded and fixed. The serpentine tube is still supported by the supporting steel plate, but is not welded and fixed, which can still ensure the installation strength of the serpentine tube. Then the flue gas entering from the smoke inlet will enter the outer cavity from the perforation, and the condenser shell itself is not sealed. Therefore, a sealing cover is set at the outer cavity position of the present device to maintain the sealing performance and prevent the flue gas from leaking.

[0032] The condensed water generated at the outer cavity position can flow downward from the water outlet into the smoke inlet, and there is no need to worry about the leakage of the condensed water. A sealing inclined plate is provided at the lower end of the cavity to facilitate the discharge of the condensed water.

[0033] The above specific implementation method is only a preferred embodiment of the present invention and is not intended to limit the implementation and scope of the claims of the present invention. All equivalent changes and modifications made based on the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A condenser flue gas sealing structure for a natural gas-fired boiler, characterized by: The condenser shell (1) comprises a smoke outlet (2) provided at the lower end thereof and a corresponding smoke inlet (3) provided at the upper end thereof, and left and right support steel plates (4) extending downward from the position of the smoke inlet (3) are provided in the condenser shell (1), and the support steel plates (4) extend downward to the position of the smoke outlet (2) and are fixed, thereby forming smoke channels (5) in the support steel plates (4) on both sides and the sealing cover (7), and forming cavities (6) between the left and right support steel plates (4) and the left and right side walls of the sealing cover (7), and a sealing cover (7) is further provided on the inner wall of the condenser shell (1), thereby forming sealed areas at the cavities (6) on both sides; The lower end of the condenser shell (1) is provided with a water inlet pipe (8), and the upper end is provided with a water outlet pipe (9), and the condenser shell (1) is also provided with a serpentine pipe (10) connected to the water inlet pipe (8) and the water outlet pipe (9), and the serpentine pipe (10) passes through the supporting steel plate (4) and extends horizontally into the flue gas channel (5), and the two ends of the serpentine pipe (10) remain in the cavity (6) accordingly.

2. The condenser flue gas sealing structure for a natural gas-fired boiler according to claim 1, characterized in that: The upper and lower ends of the supporting steel plate (4) are correspondingly welded and fixed to the smoke inlet (3) and the smoke outlet (2).

3. The condenser flue gas sealing structure for a natural gas-fired boiler according to claim 2, characterized in that: The supporting steel plate (4) is provided with corresponding through-holes (11), and the serpentine tube (10) passes through the corresponding through-holes (11) and is supported by the supporting steel plate (4). The serpentine tube (10) and the supporting steel plate (4) are not welded and fixed.

4. The condenser flue gas sealing structure for a natural gas-fired boiler according to claim 3 is characterized in that: After the smoke enters the smoke channel (5) from the smoke inlet (3), the smoke can enter the cavity (6) areas on both sides from the perforations (11) accordingly, and condensed water is precipitated in the cavity (6) areas.

5. The condenser flue gas sealing structure for a natural gas-fired boiler according to claim 4 is characterized in that: The lower end of the supporting steel plate (4) is also provided with a water outlet (12), and condensed water generated in the cavity (6) enters the smoke outlet (2) from the position of the water outlet (12).

6. The condenser flue gas sealing structure for a natural gas-fired boiler according to claim 5, characterized in that: Sealing inclined plates (13) are also provided at the bottom positions of the cavities (6) on both sides.

7. The condenser flue gas sealing structure for a natural gas-fired boiler according to claim 1, characterized in that: The serpentine tube (10) is also provided with heat exchange fins (14).

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