Exhaust system of gas-fired boiler

Abstract

The utility model discloses an exhaust system of a gas-fired boiler, which comprises the gas-fired boiler, the gas-fired boiler is fixedly connected with an exhaust pipeline, the gas-fired boiler is fixedly connected with an exhaust funnel through the exhaust pipeline, a detection platform is fixedly assembled on the side wall of the exhaust funnel, and a sampling mechanism is fixedly assembled on the side wall of the exhaust funnel. According to the exhaust system, the detection platform and the sampling mechanism are arranged on the side wall of the exhaust cylinder, and the detection platform is redesigned, so that when an operator stands on the detection platform to perform sampling operation, the detection platform has better stability, safety protection is performed on the operator, the safety risk in the sampling process is reduced, and the sampling efficiency is improved. In the sampling process, only the second positioning bolts on the two sides need to be detached, the sampling pipe can be opened, compared with a traditional fixed flange type closing mode, the opening and closing process of the sampling pipe is simpler and more convenient, the sampling time in the detection process can be effectively saved, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas emission, in particular to an exhaust system of a gas boiler. Background Art

[0002] A gas boiler is a device for heating water in industrial production. During the use of a gas boiler, the flue gas generated during the combustion process needs to be discharged into the external environment. In order to reduce the pollution of the flue gas to the surrounding environment, it is necessary to regularly detect the content of pollutants in the discharged flue gas. When the existing emission equipment detects pollutants, it is inconvenient to collect and sample the flue gas. The collection and sampling process is not only cumbersome, but also there are certain safety risks. For this reason, we propose an exhaust system of a gas boiler. Content of the Utility Model

[0003] The purpose of the utility model is to provide an exhaust system of a gas boiler to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an exhaust system of a gas boiler, including a gas boiler, the gas boiler is fixedly connected with an exhaust pipeline, the gas boiler is fixedly connected with an exhaust chimney through the exhaust pipeline, a detection platform is fixedly assembled on the side wall of the exhaust chimney, and a sampling mechanism is fixedly assembled on the side wall of the exhaust chimney.

[0005] Preferably, the detection platform includes a fixed frame, the fixed frame is fixedly connected to the side wall of the exhaust chimney, a support frame is assembled in the fixed frame, a first fixing bolt is fixedly assembled between the fixed frame and the support frame, a support block is fixedly assembled at the end of the support frame, a guardrail is fixedly assembled at the top of the support frame, a sampling frame is fixedly assembled in the guardrail, and the position of the sampling frame corresponds to that of the sampling mechanism.

[0006] Preferably, an assembly groove is formed on the surface of the support frame, a pedal is fixedly assembled in the assembly groove, and an anti-slip pattern is integrally formed on the surface of the pedal.

[0007] Preferably, the sampling mechanism includes a sampling pipe, the sampling pipe is fixedly assembled on the side wall of the exhaust chimney, an assembly block is fixedly connected to the side wall of the sampling pipe, one end of a connecting frame is rotatably connected in the assembly block, the other end of the connecting frame is fixedly connected with a cover, a positioning block is fixedly connected to the bottom of the cover, a positioning frame is fixedly connected to the bottom of the sampling pipe, and a second fixing bolt is fixedly assembled between the positioning block and the positioning frame.

[0008] Preferably, an installation plate is fixedly assembled in the inner cavity of the sampling pipe, and an annular rubber pad is fixedly assembled on the side wall of the installation plate.

[0009] Preferably, a low-nitrogen burner, an economizer, and a condenser are fixedly assembled in the exhaust pipeline.

[0010] Preferably, a lightning rod is fixedly assembled at the top of the exhaust stack.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: For an exhaust system of a gas boiler, compared with the traditional exhaust system, a detection platform and a sampling mechanism are provided on the side wall of the exhaust stack in this exhaust system. Through the redesigned detection platform, when an operator stands on the detection platform for operation and sampling, the detection platform has better stability, providing safety protection for the operator and reducing the safety risk during the sampling process;

[0012] At the same time, through the redesigned sampling mechanism, during the sampling process, only the second positioning bolts on both sides need to be disassembled to open the sampling pipe. Compared with the traditional fixed flange closed method, the opening and closing process of the sampling pipe is simpler and more convenient, which can effectively save the sampling time during the detection process and improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the present utility model.

[0014] Figure 2 It is a perspective view of the exhaust stack of the present utility model.

[0015] Figure 3 It is a schematic structural diagram of the detection platform of the present utility model.

[0016] Figure 4 It is a schematic structural diagram of the sampling mechanism of the present utility model.

[0017] Figure 5 It is a schematic internal structure diagram of the sampling pipe of the present utility model.

[0018] In the figure: 1. Gas boiler, 2. Exhaust pipeline, 3. Exhaust stack, 4. Low-nitrogen burner, 5. Economizer, 6. Condenser, 7. Detection platform, 71. Fixed frame, 72. Reinforcing block, 73. Support frame, 74. Support block, 75. Guardrail, 76. Sampling frame, 77. Assembly groove, 78. Pedal, 79. First fixing bolt, 8. Sampling mechanism, 81. Sampling pipe, 82. Assembly block, 83. Connecting frame, 84. Sealing cover, 85. Positioning block, 86. Positioning frame, 87. Second fixing bolt, 88. Mounting plate, 89. Annular rubber pad, 9. Lightning rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0020] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,This utility model provides a technical solution: An exhaust system for a gas boiler, which includes a gas boiler 1. The smoke outlet of the gas boiler 1 is connected to an exhaust stack 3 through an exhaust pipe 2. The number of exhaust stacks 3 is set to two, and the flue gas generated during the combustion of the gas boiler 1 is discharged through the two exhaust stacks 3.

[0021] As Figure 1 shown, a low-nitrogen burner 4 is assembled between the gas boiler 1 and the exhaust pipe 2. The flue gas discharged from the exhaust pipe 2 is burned by the provided low-nitrogen burner 4 to reduce the nitrogen oxides in the flue gas and make it meet the emission standards.

[0022] An economizer 5 is assembled in the exhaust pipe 2. The economizer 5 is used to collect and conduct a certain amount of heat in the flue gas, and transfer the heat to the water inlet pipe of the gas boiler 1. By setting the economizer 5, the boiler feed water is preheated using the exhaust temperature in the exhaust pipe 2 before entering the furnace body, achieving an energy-saving effect.

[0023] A condenser 6 is assembled in the exhaust pipe 2. The condenser 6 is also a kind of waste heat recovery device. The condenser 6 is mainly used to collect the waste heat in the flue gas, and then heat up the water tank that is not on the same floor as the gas boiler 1 through the waste heat, achieving an energy-saving effect.

[0024] The above exhaust scheme is a commonly used scheme for waste heat recovery and reuse during flue gas emission in the prior art, so it will not be elaborated too much.

[0025] As Figure 2 shown, a detection platform 7 is assembled on the side wall of the exhaust stack 3, and a sampling mechanism 8 is also assembled on the side wall of the exhaust stack 3. The detection platform 7 is used for operators to stand when detecting whether the flue gas discharged from the exhaust stack 3 meets the emission standards, and the sampling mechanism 8 is used for sampling when detecting the flue gas.

[0026] As Figure 2 and<l Figure 3As shown in, the detection platform 7 includes a fixing frame 71, which is welded and fixed to the side wall of the exhaust pipe 3, and a reinforcing block 72 is welded and fixed to the bottom of the fixing frame 71. The stability of the connection between the fixing frame 71 and the side wall of the exhaust pipe 3 is enhanced by setting the reinforcing block 72. The side wall of the fixing frame 71 is inserted with a support frame 73, and a first fixing bolt 79 is fixedly assembled between the fixing frame 71 and the support frame 73. The connection between the support frame 73 and the fixing frame 71 is fixed by the first fixing bolt 79. One end of the support frame 73 is inserted into the fixing frame 71, and a support block 74 is welded and fixed to the bottom of the other end of the support frame 73. The support block 74 is mainly H-shaped steel. The support block 74 is used to be installed on the roof where the exhaust system is assembled to provide auxiliary support for the support frame 73. The assembly height of the support frame 73 and the fixing frame 71 corresponds to the roof height of the building where the equipment is located. A guardrail 75 is welded and fixed on the surface of the support frame 73. The safety of the operator is improved by setting the guardrail 75.

[0027] A sampling rack 76 is welded and fixed in the guardrail 75 , and the position of the sampling rack 76 corresponds to the position of the sampling mechanism 8 . By providing the sampling rack 76 , the guardrail 75 can not only protect the operator but also reduce its influence on the sampling operation process.

[0028] like Figure 3 As shown in the figure, an assembly groove 77 is provided on the surface of the support frame 73, and a pedal 78 is fixed in the assembly groove 77. The surface of the pedal 78 is integrally formed with anti-slip grooves. The assembly groove 77 is provided on the surface of the support frame 73 to reduce the weight of the support frame 73, thereby reducing the weighing pressure of the fixing frame 71, making the connection between the support frame 73 and the fixing frame 71 more stable. The pedal 78 is used for the operator to step on during the detection and sampling process, and the anti-slip grooves are provided to prevent the operator from slipping when standing on the surface of the pedal 78.

[0029] like Figure 4 and Figure 5 As shown in the figure, the sampling mechanism 8 includes a sampling tube 81, which is fixedly assembled on the side wall of the exhaust pipe 3, and the sampling tube 81 is communicated with the inner cavity of the exhaust pipe 3, and the end of the sampling tube 81 is welded and fixed with an assembly block 82, and one end of the connecting frame 83 is rotatably connected in the assembly block 82, and the other end of the connecting frame 83 is fixedly connected with a cover 84, and the side wall of the cover 84 is welded and fixed with a handle frame, and the bottom of the cover 84 is welded and fixed with a positioning block 85, and the bottom of the sampling tube 81 is welded and fixed with a positioning frame 86, and a second fixing bolt 87 is fixedly assembled between the positioning frame 86 and the positioning block 85. The sampling tube 81 can be closed by setting the cover 84. Compared with the traditional closing method using a connecting flange, the cover 84 can be fixed in position only by the second fixing bolts 87 on both sides, thereby closing the sampling tube 81. During the sampling process, there is no need to remove more bolts and nuts, saving the sampling operation steps.

[0030] A rubber ring is fixedly assembled on the side wall of the cover 84. The size of the rubber ring is adapted to the inner diameter of the sampling pipe 81. By setting the rubber ring, the sealing performance of the cover 84 to the sampling pipe 81 is enhanced.

[0031] As Figure 5 As shown in the figure, an annular mounting plate 88 is fixedly assembled in the inner cavity of the sampling pipe 81. An annular rubber gasket 89 is fixedly assembled on the side wall of the mounting plate 88. The inner diameter of the annular rubber gasket 89 is adapted to the size of the sampling gun of the detection equipment. During the detection process, after the sampling gun is inserted into the annular rubber gasket 89, it enters the exhaust stack 3 through the sampling pipe 81 for sampling. The annular rubber gasket 89 is made of heat-resistant rubber material. By setting the annular rubber gasket 89, it can be avoided that flue gas leaks from the sampling pipe 81 during the sampling process.

[0032] As Figure 2 As shown in the figure, a lightning rod 9 is fixedly assembled on the top of the exhaust stack 3. The lightning rod 9 is grounded. By setting the lightning rod 9, the lightning protection safety requirements of the exhaust stack 3 are guaranteed.

[0033] Working principle: During the use of this exhaust system, the flue gas generated by the combustion of the gas boiler 1 is discharged outward through the exhaust stack 3. When it is necessary to detect whether the discharged flue gas meets the emission standards, the operator can enter the detection platform 7 from the roof where the overall system equipment is assembled. Then, loosen the second fixing bolt 87 in the sampling rack 76, and then turn up the cover 84 through the handle rack. Subsequently, insert the sampling gun of the detection equipment into the sampling pipe 81 for sampling operation to complete the detection of the pollutant data contained in the flue gas. This system redesigned the detection platform 7 and the sampling mechanism 8. Compared with the traditional detection and sampling methods, the detection and sampling process is safer and more convenient, improving the sampling efficiency of flue gas detection.

Claims

1. An exhaust system for a gas boiler, comprising a gas boiler (1), the gas boiler (1) is fixedly connected with an exhaust pipe line (2), and the gas boiler (1) is fixedly connected with an exhaust stack (3) through the exhaust pipe line (2), characterized in that: A detection platform (7) is fixedly assembled on the side wall of the exhaust stack (3), and a sampling mechanism (8) is fixedly assembled on the side wall of the exhaust stack (3).

2. The exhaust system of a gas boiler according to claim 1, characterized in that: The detection platform (7) includes a fixing frame (71) which is fixedly connected to the side wall of the exhaust stack (3). A support frame (73) is assembled in the fixing frame (71). A first fixing bolt (79) is fixedly assembled between the fixing frame (71) and the support frame (73). A support block (74) is fixedly assembled at the end of the support frame (73). A guardrail (75) is fixedly assembled at the top of the support frame (73). A sampling frame (76) is fixedly assembled inside the guardrail (75), and the position of the sampling frame (76) corresponds to that of the sampling mechanism (8).

3. The exhaust system of a gas boiler according to claim 2, characterized in that: An assembly groove (77) is formed on the surface of the support frame (73), and a pedal (78) is fixedly assembled in the assembly groove (77). Anti-slip lines are integrally formed on the surface of the pedal (78).

4. The exhaust gas system of a gas boiler according to claim 1, wherein: The sampling mechanism (8) includes a sampling pipe (81) which is fixedly assembled on the side wall of the exhaust stack (3). One end of a connecting frame (83) is rotatably connected inside an assembly block (82) fixed to the side wall of the sampling pipe (81). The other end of the connecting frame (83) is fixedly connected to a sealing cover (84). A positioning block (85) is fixedly connected to the bottom of the sealing cover (84). A positioning frame (86) is fixedly connected to the bottom of the sampling pipe (81). A second fixing bolt (87) is fixedly assembled between the positioning block (85) and the positioning frame (86).

5. The exhaust system of a gas boiler according to claim 4, characterized in that: An installation plate (88) is fixedly assembled in the inner cavity of the sampling pipe (81), and an annular rubber pad (89) is fixedly assembled on the side wall of the installation plate (88).

6. The exhaust gas system of a gas boiler according to claim 1, characterized in that: A low-nitrogen burner (4), an economizer (5) and a condenser (6) are fixedly assembled in the exhaust pipeline (2).

7. The exhaust system of a gas boiler according to claim 1, characterized in that: A lightning rod (9) is fixedly assembled at the top of the exhaust stack (3).

Images