Horizontal condensing gas atmospheric hot water boiler

Abstract

The application discloses a horizontal condensing gas atmospheric pressure hot water boiler, which comprises a boiler body, a water body preheating part and a water body heating part. The water body preheating part is installed above a heating chamber of the boiler body, and the water body heating part is installed in the heating chamber of the boiler body. The water body preheating part comprises a smoke exhaust pipe body fixedly and sealingly communicated with the top of the heating chamber, a plurality of layers of annular preheating pipelines arranged from top to bottom in the smoke exhaust pipe body and a first communicating pipe sequentially communicated with the annular preheating pipelines. The water body heating part comprises a plurality of layers of plate type heating pipelines fixedly installed in the heating chamber, a second communicating pipe sequentially communicated with the plate type heating pipelines and a plate type heating pipeline arranged at the uppermost layer and communicated with an annular preheating pipeline arranged at the lowermost layer. The application has the beneficial effects of improving heat exchange efficiency, heating rapidly, facilitating maintenance and condensing and heat exchanging the exhaust smoke to improve fuel utilization.

Description

Technical Field

[0001] This invention relates to the field of gas-fired boiler technology, specifically a horizontal condensing gas-fired atmospheric pressure hot water boiler. Background Technology

[0002] When using natural gas as fuel to heat hot water boilers, traditional equipment employs a relatively simple heating method: combustion of fuel via a burner and combustion chamber. The resulting heat is exchanged with the water in the boiler and then directly discharged. Because the discharged flue gas is at a high temperature, this direct emission results in energy waste and environmental pollution. Therefore, it is necessary to design a horizontal condensing natural gas-fired atmospheric pressure hot water boiler that improves heat exchange efficiency, heats rapidly, is easy to maintain, and utilizes condensation heat exchange in the exhaust gas to improve fuel utilization. Summary of the Invention

[0003] In view of the above-mentioned shortcomings in the existing technology, the purpose of this invention is to provide a horizontal condensing gas-fired atmospheric pressure hot water boiler that improves heat exchange efficiency, heats up rapidly, is easy to maintain, and performs condensation heat exchange on exhaust gas to improve fuel utilization.

[0004] The technical solution adopted by the present invention to achieve the above objectives is: a horizontal condensing gas-fired atmospheric pressure hot water boiler, comprising a boiler body, wherein the boiler body includes a heating chamber and a combustion chamber arranged sequentially from top to bottom, and further includes a water preheating section and a water heating section, wherein the water preheating section is installed above the heating chamber of the boiler body, and the water heating section is installed in the heating chamber of the boiler body;

[0005] The water preheating section includes a flue pipe body that is fixedly and sealed to the top of the heating chamber, a multi-layer annular preheating pipe body arranged from top to bottom in the flue pipe body, a first connecting pipe that sequentially connects each layer of annular preheating pipe body, water flowing from top to bottom in each layer of annular preheating pipe body, and the annular preheating pipe body arranged at the top layer being connected to the water inlet.

[0006] The water heating section includes a multi-layer plate heating pipe fixedly installed in the heating chamber, a second connecting pipe sequentially connecting each layer of plate heating pipe, the uppermost plate heating pipe connected to the lowermost annular preheating pipe, and the lowermost plate heating pipe connected to the water outlet.

[0007] It is also equipped with a burner, the flame outlet of which is connected to the combustion chamber.

[0008] The top opening of the boiler body is designed to be open, and the water heating component is installed into the heating chamber from the top of the boiler body.

[0009] The top of the flue pipe is sealed and connected to the flue chimney. The top and bottom of the flue pipe are both fitted with connecting flanges. The bottom of the flue chimney and the top of the boiler body are both fitted with connecting flanges. The flue pipe is sealed and connected to the flue chimney and the boiler body through the connecting flanges.

[0010] Each layer of the annular preheating pipeline includes multiple sets of annular pipes arranged concentrically. The corresponding sets of annular pipes are connected by multiple sets of connecting pipes evenly arranged around the corresponding center. The outermost annular pipes of two adjacent layers of the annular preheating pipeline are connected by the first connecting pipe.

[0011] When each layer of the plate heating pipes is installed in the heating chamber, one end of the plate heating pipe contacts and is fixed to the inner wall of the heating chamber, and the other end of the plate heating pipe is provided with a smoke exhaust gap between it and the inner wall of the combustion chamber on the other side. The smoke exhaust gaps of two adjacent layers of plate heating pipes are set on opposite sides. Each layer of plate heating pipes and the corresponding smoke exhaust gaps form an S-shaped upward flue gas passage.

[0012] A first connecting pipe located downstream of the lowest layer of the annular preheating pipe leads out of the flue gas pipe body, and a second connecting pipe located upstream of the highest layer of the plate heating pipe leads out of the boiler body. The first connecting pipe leading out of the flue gas pipe body and the second connecting pipe leading out of the boiler body are sealed and connected, and the portions of the first connecting pipe and the second connecting pipe leading out are wrapped with an insulation layer.

[0013] A switch valve and a pressure gauge are installed at the water outlet.

[0014] The upper and lower surfaces of the plate heating pipe are both designed with a wavy structure.

[0015] The beneficial effects of this invention are as follows: When the burner and combustion chamber work together to burn fuel, the heat generated heats the water in the plate heating pipe. The flue gas with a relatively high temperature exchanges heat with the cold water in the annular preheating pipe at the upstream end to preheat the water. Since the water flowing through the plate heating pipe has been preheated in advance, the heating speed can be ensured when heating it. At the same time, the condensation heat exchange of the exhaust gas also improves the fuel utilization rate and the heat exchange efficiency.

[0016] When cleaning and repairing the annular preheating pipes and plate heating pipes of each layer, the flue gas pipe body is disassembled. Since the top opening of the boiler body is open, it is convenient to clean, repair or replace the plate heating pipes of each layer. At the same time, the disassembled flue gas pipe body containing the annular preheating pipes is also convenient to clean, repair or replace. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the water preheating section in this invention;

[0019] Figure 3 This is a schematic diagram of the structure after the annular preheating pipeline and the first connecting pipe are combined in the water preheating section;

[0020] Figure 4 This is a top view of the annular preheating pipeline.

[0021] Figure 5 This is a schematic diagram of the water heating section in this invention;

[0022] Figure 6 This is a schematic diagram of the boiler body in this invention.

[0023] In the diagram: 1 Boiler body, 2 Heating chamber, 3 Combustion chamber, 4 Exhaust pipe, 5 Annular preheating pipe, 501 Annular pipe, 502 Connecting pipe, 6 First connecting pipe, 7 Water inlet, 8 Plate heating pipe, 9 Second connecting pipe, 10 Water outlet, 11 Burner, 12 Exhaust chimney, 13 Exhaust gap, 14 Switch valve, 15 Pressure gauge. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] Please see Figure 1 A horizontal condensing gas-fired atmospheric pressure hot water boiler includes a boiler body 1. The boiler body 1 includes a heating chamber 2 and a combustion chamber 3 arranged sequentially from top to bottom. It also includes a water preheating section and a water heating section. The water preheating section is installed above the heating chamber 2 of the boiler body 1, and the water heating section is installed in the heating chamber 2 of the boiler body 1.

[0027] The water preheating section includes a flue pipe 4 that is fixedly and sealed to the top of the heating chamber 2, a multi-layer annular preheating pipe 5 arranged from top to bottom in the flue pipe 4, and a first connecting pipe 6 that sequentially connects each layer of annular preheating pipe 5. Water flows from top to bottom in each layer of annular preheating pipe 5, and the annular preheating pipe 5 at the top layer is connected to the water inlet 7.

[0028] The water heating section includes a multi-layer plate heating pipe 8 fixedly installed in the heating chamber 2, a second connecting pipe 9 that sequentially connects each layer of plate heating pipe 8, the uppermost plate heating pipe 8 being connected to the lowermost annular preheating pipe 5, and the lowermost plate heating pipe 8 being connected to the water outlet 10.

[0029] Example 2

[0030] Please see Figure 1 , 6 The present invention further describes the boiler body 1 in Example 1 in detail and supplements the technical content. In addition, a burner 11 is provided in the present invention. The flame outlet of the burner 11 is connected to the combustion chamber 3. The burner 11 is installed in conjunction with the combustion chamber 3 to burn the gas.

[0031] The top opening of the boiler body 1 is designed to be open, and the water heating part is installed into the heating chamber 2 from the top of the boiler body 1, which facilitates the installation of the water heating part in the heating chamber 2 and makes it easy to clean the water heating part.

[0032] Example 3

[0033] Please see Figure 1-6 In conjunction with Embodiments 1 and 2, the water preheating section and the water heating section are described in further detail and supplemented with technical content. In this invention, the top end of the flue pipe 4 is sealed and connected to the flue chimney 12. The top and bottom ends of the flue pipe 4 are both equipped with connecting flanges. The bottom end of the flue chimney 12 and the top end of the boiler body 1 are both equipped with connecting flanges. The flue pipe 4 is sealed and connected to the flue chimney 12 and the boiler body 1 through the connecting flanges, so as to ensure that the flue gas generated after the fuel is burned in the combustion chamber 3 through the burner 11 is stably discharged through the flue pipe 4 and the flue chimney 12.

[0034] Each layer of annular preheating pipe 5 includes multiple sets of annular pipes 501 arranged concentrically. The corresponding sets of annular pipes 501 are connected by multiple sets of connecting pipes 502 evenly arranged around the corresponding center, ensuring that the high-temperature flue gas in the exhaust pipe 4 has a large contact area with the annular preheating pipe 5, so that the high-temperature flue gas and the water in the annular preheating pipe 5 can exchange heat stably. The outermost annular pipes 501 of two adjacent layers of annular preheating pipe 5 are connected by the first connecting pipe 6.

[0035] When each layer of plate heating pipes 8 is installed in the heating chamber 2, one end of the plate heating pipe 8 contacts and is fixed to the inner wall of the heating chamber 2, and the other end of the plate heating pipe 8 is provided with a flue gas gap 13 between it and the inner wall of the combustion chamber 3 on the other side. The flue gas gaps 13 corresponding to two adjacent layers of plate heating pipes 8 are set on opposite sides. Each layer of plate heating pipes 8 and the corresponding flue gas gaps 13 form an S-shaped rising flue gas passage. The flue gas generated during fuel combustion is discharged through the S-shaped rising flue gas passage, through the flue gas pipe body 4, and through the chimney 12. At the same time, the contact area between the flame and the high-temperature flue gas generated by combustion and each layer of plate heating pipes 8 is increased, thereby improving the heat exchange efficiency.

[0036] The first connecting pipe 6, located downstream of the lowest layer of the annular preheating pipe 5, leads out of the flue gas pipe body 4. The second connecting pipe 9, located upstream of the highest layer of the plate heating pipe 8, leads out of the boiler body 1. The first connecting pipe 6 leading out of the flue gas pipe body 4 and the second connecting pipe 9 leading out of the boiler body 1 are sealed and connected. The portions of the first connecting pipe 6 and the second connecting pipe 9 are wrapped with an insulation layer to ensure that the water that has exchanged heat with the high-temperature flue gas through each layer of the annular preheating pipe 5 enters the plate heating pipe 8 for further heating.

[0037] A switch valve 14 and a pressure gauge 15 are installed at the water outlet 10 to control the discharge of heated water and detect the water pressure in the pipeline.

[0038] The upper and lower surfaces of the plate heating pipe 8 are both designed with a corrugated structure to increase the heat exchange efficiency between the water and the high temperature generated by fuel combustion in the plate heating pipe 8.

[0039] Example 4

[0040] Please see Figure 1-6 The working principle of the present invention is as follows: When in use, fuel and air are added to the burner 11 so that the burner 11 works in conjunction with the combustion chamber 3 to burn the fuel and generate a large amount of high-temperature heat and high-temperature flue gas, which exchange heat with the water in each layer of plate heating pipes 8 from bottom to top, thereby heating the water in the pipes at high temperature.

[0041] During the heat exchange process, a large amount of heat is transferred to the water body, but the residual heat moves upward in the form of high-temperature flue gas. When it rises into the flue gas pipe body 4, the high-temperature flue gas exchanges heat with the cold water in the annular preheating pipes 5 arranged therein and preheats the water body therein. After the heat exchange is completed, the flue gas is discharged outside through the chimney 12 at a lower temperature, while the water body in the annular preheating pipes 5 has an increased temperature and flows downward to the plate heating pipes 8 of each layer for heating.

[0042] During the entire water heating process, the cold water source enters through the inlet 7 located at the top, flows from top to bottom along the annular preheating pipes 5 to the water heating section, and flows from top to bottom along the plate heating pipes 8 in the water section; the whole process is exactly the opposite of the heat flow generated by fuel combustion, resulting in high heat exchange efficiency.

[0043] Example 5

[0044] Please see Figure 1-6 When cleaning and repairing the ring preheating pipes 5 and plate heating pipes 8 of each layer, the flue pipe body 4 is disassembled. Since the top opening of the boiler body 1 is open, it is convenient to clean, repair or replace the plate heating pipes 8 of each layer.

[0045] At the same time, the exhaust pipe 4, which is equipped with the annular preheating pipe 5, can also be easily cleaned, repaired, or replaced.

[0046] Example 6

[0047] Please see Figure 1-6 The heat generated when the burner 11 and the combustion chamber 3 work together to burn fuel heats the water in the plate heating pipe 8. The remaining high-temperature flue gas exchanges heat with the cold water in the annular preheating pipe 5 at the upstream end to preheat the water. Since the water flowing through the plate heating pipe 8 is preheated in advance, it can ensure rapid heating when heating it. At the same time, the condensation heat exchange of the exhaust gas also improves the fuel utilization rate and heat exchange efficiency.

[0048] When cleaning and repairing the annular preheating pipes 5 and plate heating pipes 8 of each layer, the flue gas pipe body 4 is disassembled. Since the top opening of the boiler body 1 is open, it is convenient to clean, repair or replace the plate heating pipes 8 of each layer. At the same time, the flue gas pipe body 4 containing the annular preheating pipes 5 is also convenient to clean, repair or replace.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A horizontal condensing gas-fired atmospheric pressure hot water boiler, comprising a boiler body (1), wherein the boiler body (1) comprises a heating chamber (2) and a combustion chamber (3) arranged sequentially from top to bottom, characterized in that: It also includes a water preheating section and a water heating section. The water preheating section is installed above the heating chamber (2) of the boiler body (1), and the water heating section is installed in the heating chamber (2) of the boiler body (1). The water preheating section includes a flue pipe (4) that is fixedly and sealed to the top of the heating chamber (2), a multi-layer annular preheating pipe (5) arranged from top to bottom in the flue pipe (4), and a first connecting pipe (6) that sequentially connects each layer of the annular preheating pipe (5). The water in each layer of the annular preheating pipe (5) flows from top to bottom, and the annular preheating pipe (5) at the top layer is connected to the water inlet (7). Each layer of the annular preheating pipeline (5) includes multiple sets of annular pipes (501) arranged concentrically. Each set of annular pipes (501) is connected by multiple sets of connecting pipes (502) evenly arranged around the corresponding center. The outermost annular pipes (501) of two adjacent layers of the annular preheating pipeline (5) are connected by the first connecting pipe (6). The water heating section includes a multi-layer plate heating pipe (8) fixedly installed in the heating chamber (2), a second connecting pipe (9) sequentially connecting each layer of plate heating pipe (8), the uppermost plate heating pipe (8) being connected to the lowermost annular preheating pipe (5), and the lowermost plate heating pipe (8) being connected to the water outlet (10). The upper and lower surfaces of the plate heating pipe (8) are both configured with a wavy structure.

2. A horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 1, characterized in that: A burner (11) is also provided, and the flame outlet of the burner (11) is connected to the combustion chamber (3).

3. A horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 2, characterized in that: The top opening of the boiler body (1) is set to be open, and the water heating part is installed into the heating chamber (2) from the top of the boiler body (1).

4. A horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 3, characterized in that: The top of the flue pipe (4) is sealed and connected to the flue chimney (12). The top and bottom of the flue pipe (4) are both fitted with connecting flanges. The bottom of the flue chimney (12) and the top of the boiler body (1) are both fitted with connecting flanges. The flue pipe (4) is sealed and connected to the flue chimney (12) and the boiler body (1) through the connecting flanges.

5. A horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 1, characterized in that: When each layer of the plate heating pipe (8) is installed in the heating chamber (2), one end of the plate heating pipe (8) contacts and is fixed to the inner wall of the heating chamber (2), and the other end of the plate heating pipe (8) is provided with a smoke exhaust gap (13) between it and the inner wall of the combustion chamber (3). The smoke exhaust gaps (13) of two adjacent layers of plate heating pipe (8) are set on opposite sides. Each layer of plate heating pipe (8) and the corresponding smoke exhaust gap (13) form an S-shaped rising flue gas passage.

6. A horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 5, characterized in that: The first connecting pipe (6) connected downstream of the bottommost annular preheating pipe (5) leads out of the flue gas pipe body (4), and the second connecting pipe (9) connected upstream of the topmost plate heating pipe (8) leads out of the boiler body (1). The first connecting pipe (6) leading out of the flue gas pipe body (4) and the second connecting pipe (9) leading out of the boiler body (1) are sealed and connected, and the portions of the first connecting pipe (6) and the second connecting pipe (9) leading out are wrapped with an insulation layer.

7. A horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 1, characterized in that: A switch valve (14) and a pressure gauge (15) are installed at the water outlet (10).

Images