Condensation type gas-steam boiler

Abstract

The utility model relates to the technical field of boilers, and discloses a condensation type gas-steam boiler which comprises a boiler body, and a combustor and a smoke pipe are fixedly installed in a cavity of the boiler body. The condensation assembly comprises an outer shell, medium pipes and a guide body, the outer shell is fixedly connected with the boiler body and provided with a cavity, the smoke pipe is located in the cavity of the outer shell, the guide body is arranged in the cavity of the outer shell and makes contact with the smoke pipe for heat exchange, and the two medium pipes are fixedly installed on the wall face of the outer shell and used for inlet and outlet of heat exchange media respectively. Compared with the prior art that heat is exchanged in the smoke pipe, the heat exchanger is arranged outside the smoke pipe, blocking of smoke in the smoke pipe can be reduced, smoke discharging smoothness is guaranteed, sufficient combustion of fuel in the combustor is guaranteed, the spiral guiding body is matched, the heat exchange area of the medium and the smoke pipe can be increased, the heat exchange efficiency is improved, and the heat exchange efficiency is improved. And meanwhile, guiding of the medium is guaranteed, and the medium flows in the cavity of the outer shell more smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a condensing gas steam boiler. Background Art

[0002] The smoke and harmful gases produced by coal-fired boilers are one of the main sources of air pollution. In order to improve pollution, the existing technology adjusts the composition of fuel, and boilers using gas as fuel have emerged.

[0003] The prior art discloses a vertical gas-fired condensing steam boiler (CN210135563U), comprising a boiler shell and a condenser, wherein a furnace, a smoke pipe and a smoke chamber cylinder which are connected in sequence from bottom to top are arranged in the boiler shell, and the smoke chamber cylinder is connected to the condenser through an outlet device, and the condenser comprises a condenser shell, a smoke inlet device, a smoke outlet device and a serpentine pipe, wherein the smoke inlet device and the smoke outlet device are respectively connected to the two sides of the condenser shell, and the serpentine pipe comprises a plurality of straight pipes and a transition section, wherein the straight pipes are connected end to end through the transition section to form an S-shaped pipe, and the serpentine pipe is installed in an active cavity inside the condenser shell, and the transition section comprises a connecting block, wherein a connecting cavity is arranged inside the connecting block, and the straight pipes connected to the same connecting section are connected to the connecting cavity after being inserted into the same connecting block, and the straight pipes are spiral finned tubes.

[0004] In the prior art, in order to improve the utilization of exhaust gas, a condenser is installed in the smoke pipe to achieve heat exchange. The main function of the smoke pipe is to discharge combustion exhaust gas. The installation of a heat exchange component in the smoke pipe will inevitably block the smooth discharge of the smoke and thus affect the combustion effect in the burner. Although the contact area with the smoke is increased by installing fins, the heat utilization of the smoke is improved, it also has a negative impact on the emission of the smoke, and there is a certain room for optimization.

[0005] To this end, we propose a condensing gas steam boiler. Utility Model Content

[0006] The utility model mainly solves the technical problem that the exhaust efficiency is affected by being blocked during the flue gas heat exchange process, and provides a condensing gas steam boiler.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme, a condensing gas steam boiler, comprising:

[0008] The boiler body is a tank structure for storing water. A water supply pipe for water inlet and a sewage discharge pipe for sewage discharge are fixedly installed on the side wall of the boiler body. A burner is fixedly installed in the cavity of the boiler body. The boiler body is fixedly installed with a fuel pipe for supplying air to the burner;

[0009] The steam pipe is fixedly installed on the top of the boiler body to discharge steam;

[0010] A smoke pipe, fixedly installed on the top of the boiler body and connected to the smoke exhaust port of the burner;

[0011] A condensation assembly, arranged on the top of the boiler body and used for heat exchange with the high-temperature exhaust gas in the smoke pipe. The condensation assembly includes a housing, a medium pipe and a guiding body. The housing is fixedly connected to the boiler body. The housing has a cavity. The smoke pipe is located in the cavity of the housing. The guiding body is arranged in the cavity of the housing and contacts the smoke pipe for heat exchange. Two medium pipes are fixedly installed on the wall surface of the housing respectively for the inlet and outlet of the heat exchange medium.

[0012] As a preferred embodiment of the present invention, the housing forms a sealed cylindrical structure. Windows adapted to the smoke pipe are provided on both the top surface and the bottom surface of the housing. The smoke pipe passes through the windows and extends above the housing. The inner diameter of the housing is larger than the diameter of the smoke pipe. A heat exchange channel is formed between the inner wall of the housing and the outer wall of the smoke pipe. The guiding body is located in the heat exchange channel and divides the heat exchange channel into a spiral shape.

[0013] As a preferred embodiment of the present invention, the guiding body forms a spiral metal plate. The outer ring of the guiding body is fixedly connected to the inner wall of the housing, and the inner ring of the guiding body is fixedly connected to the outer wall of the smoke pipe.

[0014] As a preferred embodiment of the present invention, flanges are fixedly installed at the ends of the medium pipes. The medium pipes penetrate through the housing and extend into the heat exchange channel. One of the medium pipes is close to the top surface of the housing, and the other medium pipe is close to the bottom of the housing. The ports of the two medium pipes are both within the pitch of the guiding body.

[0015] As a preferred embodiment of the present invention, the condensation assembly further includes an exhaust sub-pipe and a collection hood. The collection hood is fixedly connected to the exhaust sub-pipe. The exhaust sub-pipe is installed in the smoke pipe. The collection hood can guide the flue gas into the exhaust sub-pipe and discharge it outside the smoke pipe.

[0016] As a preferred embodiment of the present invention, the collection hood forms a funnel-shaped structure. The smaller port of the collection hood is fixedly connected to the lower end surface of the exhaust sub-pipe. A bracket is fixedly installed in the smoke pipe. The exhaust sub-pipe is fixedly installed on one side of the bracket and close to the inner wall of the smoke pipe. The smaller port of the collection hood faces the lower end of the smoke pipe, and the upper end of the exhaust sub-pipe extends above the smoke pipe.

[0017] As a preferred embodiment of the present invention, two liquid level gauge connecting pipes are further installed on the outer wall of the boiler body. The liquid level gauge connecting pipes penetrate through the boiler body and extend into the cavity of the boiler body.

[0018] Beneficial effects

[0019] The present invention provides a condensing gas steam boiler. It has the following beneficial effects:

[0020] 1. The condensing gas steam boiler, by arranging an outer casing outside the flue pipe, during the process of the flue gas discharging from the flue pipe, the medium to be heat-exchanged is sent into the cavity of the outer casing through the medium pipe to contact and exchange heat with the flue pipe, reducing the temperature of the flue gas. The medium can be water. The water fed into the boiler body can be first sent into the outer casing through the medium pipe for heat exchange and temperature rise and then sent into the boiler body, so as to improve the energy utilization rate. Compared with the prior art of heat exchange inside the flue pipe, in this solution, the heat exchange is arranged outside the flue pipe, which can reduce the blockage of the flue gas inside the flue pipe, ensure the smooth exhaust, and further ensure the full combustion of the fuel in the burner. Cooperating with the spiral guiding body, it can increase the heat exchange area between the medium and the flue pipe, improve the heat exchange efficiency, and at the same time ensure the guidance of the medium, making the medium flow more smoothly during the flow in the cavity of the outer casing.

[0021] 2. The condensing gas steam boiler, by arranging an exhaust sub-pipe and a collecting hood, using the collecting hood to guide and collect the flue gas, enables part of the flue gas discharged from the flue pipe to enter the exhaust sub-pipe and be discharged above the port of the flue pipe, increasing the air flow effect at the port of the flue pipe. Under the action of the flow velocity difference, the air fluidity above the flue pipe is stronger, thereby improving the exhaust effect of the flue gas inside the flue pipe and ensuring the exhaust efficiency. Specifically, the exhaust sub-pipe can be inclined, that is, the flue gas discharged from the exhaust sub-pipe blows towards the port of the flue pipe from the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is one of the overall three-dimensional views of the present utility model;

[0023] Figure 2 is the second of the overall three-dimensional views of the present utility model;

[0024] Figure 3 is the schematic diagram of the internal structure of the boiler body of the present utility model;

[0025] Figure 4 is the schematic diagram of the installation of the guiding body and the flue pipe of the present utility model;

[0026] Figure 5 is the three-dimensional view of the exhaust sub-pipe and the collecting hood of the present utility model.

[0027] Legend: 10. Boiler body; 11. Make-up water pipe; 12. Blowdown pipe; 13. Fuel pipe; 14. Steam pipe; 15. Flue pipe; 20. Outer casing; 21. Medium pipe; 22. Guiding body; 30. Exhaust sub-pipe; 31. Collecting hood. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] A condensing gas steam boiler, as Figure 1 and Figure 2 shown, includes:

[0029] The boiler body 10, which is a tank structure for storing water. A water replenishing pipe 11 for water inlet and a sewage discharge pipe 12 for sewage discharge are fixedly installed on the side wall of the boiler body 10. A burner is fixedly installed in the cavity of the boiler body 10. The boiler body 10 is fixedly installed with a fuel pipe 13 for supplying gas to the burner; A steam pipe 14 is fixedly installed on the top of the boiler body 10 for discharging steam; A smoke pipe 15 is fixedly installed on the top of the boiler body 10 and connected to the smoke outlet of the burner. Two liquid level gauge connecting pipes are also installed on the outer wall of the boiler body 10. The liquid level gauge connecting pipes penetrate through the boiler body 10 and extend into the cavity of the boiler body 10. By installing a liquid level gauge between the two liquid level gauge connecting pipes, it is convenient to observe the liquid level height in the boiler body 10 so as to replenish water in time. The gas mixture is sent into the burner through the fuel pipe 13. The gas combustion generates heat to heat the water in the boiler body 10, and the flue gas is discharged from the smoke pipe 15. The water replenishing pipe 11 is connected to a water source, such as a tap water pipe. The sewage discharge pipe 12 is used for discharging sewage. The burner is a known prior art, and specific models and specifications are not overly restricted;

[0030] Such as Figure 2 , Figure 3 And Figure 4As shown, the condensation assembly is arranged on the top of the boiler body 10 and is used for heat exchange with the high-temperature exhaust gas in the smoke pipe 15. The condensation assembly includes an outer shell 20, a medium pipe 21 and a guide body 22. The outer shell 20 is fixedly connected to the boiler body 10. The outer shell 20 has a cavity. The smoke pipe 15 is located in the cavity of the outer shell 20. The guide body 22 is arranged in the cavity of the outer shell 20 and contacts with the smoke pipe 15 for heat exchange. Two medium pipes 21 are fixedly installed on the wall of the outer shell 20 for entering and exiting the heat exchange medium respectively. The outer shell 20 forms a sealed cylindrical structure. The outer shell 2 0 is provided with windows adapted to the smoke tube 15 on the top and bottom surfaces, and the smoke tube 15 extends through the windows to the top of the outer shell 20, the inner diameter of the outer shell 20 is larger than the diameter of the smoke tube 15, and a heat exchange channel is formed between the inner wall of the outer shell 20 and the outer wall of the smoke tube 15, the guide body 22 is located in the heat exchange channel and divides the heat exchange channel into a spiral shape, the guide body 22 forms a spiral metal plate, the outer ring of the guide body 22 is fixedly connected to the inner wall of the outer shell 20, the inner ring of the guide body 22 is fixedly connected to the outer wall of the smoke tube 15, and the end of the medium tube 21 is fixedly installed with a flange, The medium pipe 21 penetrates the outer shell 20 and extends into the heat exchange channel. One of the medium pipes 21 is close to the top surface of the outer shell 20, and the other medium pipe 21 is close to the bottom of the outer shell 20. The ports of the two medium pipes 21 are both located within the pitch of the guide body 22. In this solution, the outer shell 20 is arranged outside the smoke pipe 15. During the process of exhausting the smoke from the smoke pipe 15, the medium to be heat exchanged is sent into the cavity of the outer shell 20 through the medium pipe 21 to contact with the smoke pipe 15 for heat exchange, thereby reducing the temperature of the smoke. The medium can be water, and the water sent into the boiler body 10 can be It is first sent into the outer shell 20 through the medium pipe 21 for heat exchange and temperature rise, and then sent into the boiler body 10 to improve energy utilization. Compared with the prior art that exchanges heat in the smoke pipe 15, this solution sets the heat exchange outside the smoke pipe 15, which can reduce the obstruction of the smoke in the smoke pipe 15, ensure smooth smoke exhaust, and further ensure the full combustion of the fuel in the burner. In conjunction with the spiral guide body 22, the heat exchange area between the medium and the smoke pipe 15 can be increased, the heat exchange efficiency can be improved, and at the same time, the guidance of the medium can be guaranteed, and the medium can flow more smoothly in the cavity of the outer shell 20.

[0031] like Figure 4 and Figure 5As shown, the condensing assembly also includes an exhaust sub-pipe 30 and a collecting hood 31. The collecting hood 31 is fixedly connected to the exhaust sub-pipe 30. The exhaust sub-pipe 30 is installed in the smoke pipe 15. The collecting hood 31 can guide the smoke into the exhaust sub-pipe 30 and discharge it outside the smoke pipe 15. The collecting hood 31 forms a funnel-shaped structure. The smaller port of the collecting hood 31 is fixedly connected to the lower end surface of the exhaust sub-pipe 30. A bracket is fixedly installed in the smoke pipe 15. The exhaust sub-pipe 30 is fixedly installed on one side of the bracket and close to the inner wall of the smoke pipe 15. The smaller port of the collecting hood 31 faces the lower end of the smoke pipe 15, and the upper end of the exhaust sub-pipe 30 extends to the upper end of the smoke pipe 15. In the present scheme, as a supplement to the above scheme, an exhaust sub-duct 30 and a collecting hood 31 are provided, and the collecting hood 31 is used to guide and collect the smoke, so that part of the smoke discharged from the smoke pipe 15 enters the exhaust sub-duct 30 and is discharged above the port of the smoke pipe 15, thereby increasing the air flow effect at the port of the smoke pipe 15. Under the action of the flow velocity difference, the air flow above the smoke pipe 15 is stronger, thereby improving the effect of smoke discharge in the smoke pipe 15 and ensuring the smoke exhaust efficiency. Specifically, the exhaust sub-duct 30 can be inclined, that is, the smoke discharged from the exhaust sub-duct 30 is blown to the port of the smoke pipe 15 from the side.

[0032] Working principle of the utility model: during the exhaust of smoke from the smoke pipe 15, the medium that needs heat exchange is sent into the cavity of the outer shell 20 through the medium pipe 21 to contact with the smoke pipe 15 for heat exchange, thereby reducing the temperature of the smoke. The medium can be water. The water sent into the boiler body 10 can be first sent into the outer shell 20 through the medium pipe 21 for heat exchange and temperature rise before being sent into the boiler body 10. The heat exchange is arranged outside the smoke pipe 15, which can reduce the obstruction of the smoke in the smoke pipe 15, ensure the smooth exhaust of smoke, and then ensure the full combustion of the fuel in the burner. With the spiral guide body 2 2. It can increase the heat exchange area between the medium and the smoke pipe 15, improve the heat exchange efficiency, and use the collection hood 31 to guide and collect the smoke, so that part of the smoke discharged from the smoke pipe 15 enters the exhaust sub-pipe 30 and is discharged above the port of the smoke pipe 15, thereby increasing the air flow effect at the port of the smoke pipe 15. Under the effect of the flow velocity difference, the air flow above the smoke pipe 15 is stronger, thereby improving the effect of smoke discharge in the smoke pipe 15. Specifically, the exhaust sub-pipe 30 can be inclined, that is, the smoke discharged from the exhaust sub-pipe 30 is blown to the end of the smoke pipe 15 from the side.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A condensing gas steam boiler, characterized in that: include: A boiler body (10) is a tank structure for storing water. A water supply pipe (11) for water intake and a sewage discharge pipe (12) for sewage discharge are fixedly installed on the side wall of the boiler body (10). A burner is fixedly installed in the cavity of the boiler body (10). The boiler body (10) is fixedly installed with a fuel pipe (13) for supplying air to the burner. A steam pipe (14) is fixedly mounted on the top of the boiler body (10) for discharging steam; A smoke pipe (15) is fixedly mounted on the top of the boiler body (10) and connected to the smoke exhaust port of the burner; A condensation component is arranged on the top of a boiler body (10) and is used for heat exchange with high-temperature exhaust gas in a smoke pipe (15). The condensation component comprises an outer shell (20), a medium pipe (21) and a guide body (22). The outer shell (20) is fixedly connected to the boiler body (10). The outer shell (20) has a cavity. The smoke pipe (15) is located in the cavity of the outer shell (20). The guide body (22) is arranged in the cavity of the outer shell (20) and is in contact with the smoke pipe (15) for heat exchange. Two medium pipes (21) are fixedly installed on the wall of the outer shell (20) and are used for the entry and exit of heat exchange medium.

2. The condensing gas steam boiler according to claim 1, characterized in that: The outer shell (20) forms a sealed cylindrical structure. Windows adapted to the smoke pipe (15) are provided on the top and bottom surfaces of the outer shell (20). The smoke pipe (15) extends through the windows to the top of the outer shell (20). The inner diameter of the outer shell (20) is greater than the diameter of the smoke pipe (15). A heat exchange channel is formed between the inner wall of the outer shell (20) and the outer wall of the smoke pipe (15). The guide body (22) is located in the heat exchange channel and divides the heat exchange channel into a spiral shape.

3. The condensing gas steam boiler according to claim 1, characterized in that: The guide body (22) is formed of a spiral metal plate, the outer ring of the guide body (22) is fixedly connected to the inner wall of the outer shell (20), and the inner ring of the guide body (22) is fixedly connected to the outer wall of the smoke pipe (15).

4. The condensing gas steam boiler according to claim 1, characterized in that: A flange is fixedly mounted at the end of the medium pipe (21), and the medium pipe (21) passes through the outer shell (20) and extends into the heat exchange channel, wherein one medium pipe (21) is close to the top surface of the outer shell (20), and the other medium pipe (21) is close to the bottom of the outer shell (20), and the ports of the two medium pipes (21) are both located within the pitch of the guide body (22).

5. The condensing gas steam boiler according to claim 1, characterized in that: The condensing assembly further comprises an exhaust sub-pipe (30) and a collecting hood (31); the collecting hood (31) is fixedly connected to the exhaust sub-pipe (30); the exhaust sub-pipe (30) is installed in the smoke pipe (15); the collecting hood (31) can guide smoke into the exhaust sub-pipe (30) and discharge it outside the smoke pipe (15).

6. The condensing gas steam boiler according to claim 5, characterized in that: The collecting hood (31) forms a funnel-shaped structure, the smaller port of the collecting hood (31) is fixedly connected to the lower end surface of the exhaust auxiliary pipe (30), a bracket is fixedly installed in the smoke pipe (15), the exhaust auxiliary pipe (30) is fixedly installed on one side of the bracket and close to the inner wall of the smoke pipe (15), the smaller port of the collecting hood (31) faces the lower end of the smoke pipe (15), and the upper end of the exhaust auxiliary pipe (30) extends to the upper side of the smoke pipe (15).

7. The condensing gas steam boiler according to claim 1, characterized in that: Two liquid level gauge connecting pipes are also installed on the outer wall of the boiler body (10), and the liquid level gauge connecting pipes penetrate the boiler body (10) and extend into the cavity of the boiler body (10).

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