A fully premix condensing steam boiler

Abstract

The application discloses a full-premix condensing steam boiler, which comprises a boiler, a combustion cavity arranged in the boiler, a first conveying port and a second conveying port arranged on the boiler, a combustion assembly extended into the combustion cavity and used for combustion in the combustion cavity, a first heat exchange assembly comprising a discharge pipe and a first heat exchange part, an input end of the discharge pipe communicated with the first conveying port, the first heat exchange part connected in the discharge pipe and communicated with the input end and an output end of the discharge pipe respectively, and a second heat exchange assembly comprising a heat exchange finned pipe communicated with the second conveying port. The technical scheme of the application can improve the heat utilization rate.

Description

Technical Field

[0001] This invention relates to the field of steam boiler technology, and more specifically to a fully premixed condensing steam boiler. Background Technology

[0002] A steam boiler refers to boiler equipment that produces steam. Steam boilers have higher combustion temperatures, resulting in flue gas temperatures significantly higher than conventional boilers, typically exceeding 200°C. Consequently, the latent heat of water vapor in the flue gas is not fully utilized. Therefore, condensing boilers have been introduced to the market. These boilers use heat recovery equipment to lower the flue gas temperature below the flue gas dew point (or water dew point), thereby improving energy efficiency. Currently, condensing boilers on the market mainly come in two structural forms: separate and integrated. The former involves adding a condensing heat exchanger after a conventional boiler, resulting in a low condensation rate and minimal improvement in overall boiler thermal efficiency. The latter integrates the conventional boiler and the condensing heat exchanger into a single structure, typically composed of a single-channel, integrated heat exchange coil. Summary of the Invention

[0003] The main objective of this invention is to propose a fully premixed condensing steam boiler, which aims to improve heat utilization efficiency.

[0004] The above-mentioned problems to be solved by the present invention are achieved through the following technical solutions:

[0005] A fully premixed condensing steam boiler, comprising:

[0006] A boiler, wherein the boiler has a combustion chamber; the boiler is provided with a first conveying port and a second conveying port;

[0007] A combustion assembly that extends into and is used for combustion within the combustion cavity;

[0008] A first heat exchange assembly, comprising a discharge pipe and a first heat exchange component; the input end of the discharge pipe is connected to the first delivery port; the first heat exchange component is connected inside the discharge pipe and is connected to both the input and output ends of the discharge pipe.

[0009] The second heat exchange assembly includes a heat exchange finned tube, which is connected to the second delivery port.

[0010] Preferably, the first heat exchange component includes an energy saver and a condenser; one side of the energy saver is connected to the first inlet; the other side of the energy saver is connected to the condenser; and the condenser is connected to the output end of the discharge pipe.

[0011] Preferably, the heat exchange finned tube includes a supporting tube body, a supporting inner frame, outer heat-conducting fins, and a spiral heat exchange section; the outer heat-conducting fins are arranged around the outer surface of the supporting tube body; the supporting tube body has a first inner cavity; the supporting inner frame is located at the opening of the first inner cavity, and the spiral heat exchange section is located at the outlet of the first inner cavity.

[0012] Preferably, the inner support frame is provided with at least two first channels, the first channels communicating with the first inner cavity and the outside of the heat exchange finned tube; and / or, the spiral heat exchange part includes an inner support tube, side support blocks and spiral blades; two side support blocks are selected and are respectively located at both ends of the inner support tube; the spiral blades are arranged around the outer surface of the inner support tube; and the side support blocks are provided with at least two first channels, the first channels communicating with the conveying trajectory of the spiral blades.

[0013] Preferably, the second delivery port includes a first diversion port and a second diversion port, and the second heat exchange assembly further includes a first delivery pipe and a second delivery pipe. The first delivery pipe is connected to one end of the first diversion port and the heat exchange finned tube, respectively, and the second delivery pipe is connected to the other end of the second diversion port and the heat exchange finned tube, respectively. The first diversion port is located below the second diversion port.

[0014] Preferably, the second heat exchange assembly further includes a booster pump and a control valve; the booster pump is connected to the first delivery pipe and the heat exchange finned tube respectively; the control valve is connected to the first delivery pipe; and / or, the first delivery pipe is provided with a second pressure detection component.

[0015] Preferably, the combustion assembly includes a combustion-supporting gas pipeline, a mixing pipe, a gas pipeline, a burner head, and a mixing fan; the mixing pipe is provided with a first through hole, a second through hole, and a third through hole; the combustion-supporting gas pipeline and the gas pipeline are respectively connected to the first through hole and the second through hole, and the combustion-supporting gas pipeline is used to transport combustion-supporting gas, and the gas pipeline is used to transport gas; the mixing fan is connected to the third through hole; the burner head is connected to the outlet of the mixing fan.

[0016] Preferably, the combustion assembly further includes a gas proportional control valve, which is connected to the gas-supporting pipeline and the first through hole respectively; and / or, the burner head is a metal fiber burner head.

[0017] Preferably, the outer surfaces of the boiler and the discharge pipe are provided with an insulating outer layer;

[0018] The outer insulation layer can be made of insulation cotton or cement.

[0019] Preferably, the boiler is provided with at least two first cavities, and the two first cavities are arranged opposite to each other; the boiler is also provided with a first movable column, which is movably connected to the first cavity; and the boiler is also provided with a first pressure detection component, which can extend into one of the first cavities.

[0020] Beneficial effects: The technical solution of this invention utilizes a portion of the waste smoke containing heat generated in the boiler by the combustion assembly to be discharged through an exhaust pipe. The heat of the waste smoke is absorbed and conducted to other metal media by a first heat exchange component, thereby achieving heat transfer and reducing heat loss. Simultaneously, another portion of the waste smoke containing heat generated in the boiler by the combustion assembly directly passes through a heat exchange finned tube, where the heat of the waste smoke is absorbed and conducted to other metal media, achieving heat transfer and reducing heat loss. This achieves dual-track heat transfer and conduction, improving heat utilization efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an embodiment of a fully premixed condensing steam boiler according to the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the second heat exchange component in an embodiment of a fully premixed condensing steam boiler according to the present invention.

[0024] Figure 3 This is a top view of an embodiment of a fully premixed condensing steam boiler according to the present invention.

[0025] Figure 4 This is a schematic diagram of the combustion assembly of an embodiment of a fully premixed condensing steam boiler according to the present invention.

[0026] Figure 5 This is a partially enlarged view of the heat exchange finned tubes of an embodiment of a fully premixed condensing steam boiler according to the present invention.

[0027] Figure 6 This is a schematic diagram of the spiral heat exchange section of an embodiment of a fully premixed condensing steam boiler according to the present invention.

[0028] Reference numerals: 1-Frame; 11-Boiler; 12-Outer insulation layer; 13-First movable column; 14-First cavity; 15-First pressure detection component; 2-Combustion assembly; 21-Gas combustion pipe; 22-Gas proportional control valve; 23-Mixing pipe; 24-Gas pipe; 25-Mixing fan; 26-Burn head; 3-Discharge pipe; 4-First heat exchange component; 6-Second heat exchange assembly; 61-First delivery pipe; 62-Booster pump; 63-Control valve; 64-Heat exchange finned tube; 611-First inner cavity; 621-First channel; 641-Supporting tube body; 6412-Second channel; 642-Supporting inner frame; 643-Outer heat-conducting fins; 644-Spiral heat exchanger; 6441-Supporting inner tube; 6442-Side support block; 6443-Spiral fin; 65-Second pressure detection component; 66-Second delivery pipe. Detailed Implementation

[0029] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] This invention proposes a fully premixed condensing steam boiler.

[0033] like Figure 1-3As shown, in one embodiment of the present invention, the fully premixed condensing steam boiler includes:

[0034] Boiler 11, wherein the boiler 11 is provided with a combustion chamber; the boiler 11 is provided with a first conveying port and a second conveying port;

[0035] Combustion assembly 2, which extends into the combustion cavity and is used for combustion within the combustion cavity;

[0036] The first heat exchange assembly includes a discharge pipe 3 and a first heat exchange component 4; the input end of the discharge pipe 3 is connected to the first delivery port; the first heat exchange component 4 is connected inside the discharge pipe 3 and is connected to the input end and the output end of the discharge pipe 3 respectively.

[0037] The second heat exchange component 6 includes a heat exchange finned tube 64, which is connected to the second delivery port.

[0038] The technical solution of this invention employs a method where a portion of the waste smoke containing heat generated in the boiler by the combustion assembly is discharged through an exhaust pipe. The heat from this waste smoke is absorbed by a first heat exchange component and conducted to other metal media, thus achieving heat transfer and reducing heat loss. Simultaneously, another portion of the waste smoke containing heat generated in the boiler by the combustion assembly directly passes through a heat exchange finned tube, where the heat is absorbed by the finned tube and conducted to other metal media, achieving heat transfer and reducing heat loss. This dual-track heat transfer and conduction improves heat utilization efficiency.

[0039] Specifically, in some embodiments, the first heat exchange component 4 includes an energy-saving device and a condenser; one side of the energy-saving device is connected to the first inlet; the other side of the energy-saving device is connected to the condenser; and the condenser is connected to the output end of the discharge pipe 3. The energy-saving device includes a main body, with a copper coil installed inside. Its inlet is connected to a check valve and a shut-off valve, a safety valve, and a water pump connected to a soft water tank. The outlet of the copper coil is connected to the check valve via a water pipe, on which a thermometer is installed. The condenser converts gas or vapor into liquid, rapidly transferring heat from the tube to the air near the tube.

[0040] Specifically, in some implementations, such as Figure 1 , 5As shown in Figure 6, the heat exchange finned tube 64 includes a supporting tube body 641, a supporting inner frame 642, outer heat-conducting fins 643, and a spiral heat exchange section 644; the outer heat-conducting fins 643 are arranged around the outer surface of the supporting tube body 641; the supporting tube body 641 is provided with a first inner cavity 611; the supporting inner frame 642 is located at the opening of the first inner cavity 611, and the spiral heat exchange section 644 is located at the outlet of the first inner cavity 611.

[0041] The inner support frame 642 is provided with at least two first channels 621, which communicate with the first inner cavity and the outside of the heat exchange finned tube 64. Multiple channels with small inner diameters increase the conveying speed and thus the heat exchange speed.

[0042] Among them, such as Figure 5 and 6 As shown, the spiral heat exchanger 644 includes a supporting inner tube 6441, side support blocks 6442, and spiral blades 6443. Two side support blocks 6442 are selected and located at both ends of the supporting inner tube 6441. The spiral blades 6443 are arranged around the outer surface of the supporting inner tube 6441. Each side support block 6442 has at least two first channels 6412, which communicate with the conveying trajectory of the spiral blades 6443. The internal spiral heat exchange method can improve the heat exchange capacity and efficiency, and can effectively separate liquid from the gas, achieving vapor-water separation.

[0043] Specifically, in some implementations, such as Figure 1 and 2 As shown, the second conveying port includes a first diversion port and a second diversion port. The second heat exchange assembly 6 also includes a first conveying pipe 61 and a second conveying pipe 66. The first conveying pipe 61 is connected to one end of the first diversion port and one end of the heat exchange finned tube 64, respectively. The second conveying pipe 66 is connected to the other end of the second diversion port and the heat exchange finned tube 64, respectively. The first diversion port is located below the second diversion port. This heat exchange method, which conveys heat from a lower position to a higher position, effectively separates gas and liquid while ensuring heat exchange efficiency. Furthermore, the heat from another portion of the waste flue gas can be recovered and returned to the boiler before being discharged through the exhaust pipe, achieving dual heat absorption and improving heat utilization.

[0044] Specifically, in some implementations, such as Figure 1 and 2 As shown, the second heat exchange assembly 6 also includes a booster pump 62 and a control valve 63; the booster pump 62 is connected to the first delivery pipe 61 and the heat exchange finned tube 64 respectively; the control valve 63 is connected to the first delivery pipe 61.

[0045] In some embodiments, a second pressure detection component 65 is provided on the first delivery pipe 61. This structure can monitor the gas pressure of the second heat exchange method in real time through the second pressure detection component, thereby improving safety during use.

[0046] Specifically, in some implementations, such as Figure 1 and 4 As shown, the combustion assembly 2 includes a combustion-supporting gas pipeline 21, a mixing pipe 23, a gas pipeline 24, a burner head 26, and a mixing fan 25. The mixing pipe 23 is provided with a first through hole, a second through hole, and a third through hole. The combustion-supporting gas pipeline 21 and the gas pipeline 24 are respectively connected to the first through hole and the second through hole, and the combustion-supporting gas pipeline 21 is used to transport combustion-supporting gas, and the gas pipeline 24 is used to transport gas. The mixing fan 25 is connected to the third through hole. The burner head 26 is connected to the outlet of the mixing fan 25.

[0047] Among them, the combustion-supporting gas includes air; hydrogen; and the combustion gas includes carbon monoxide, hydrocarbons, boranes, silanes, etc.

[0048] The combustion assembly 2 also includes a gas proportional control valve 22, which is connected to the gas-supporting pipeline 21 and the first through hole, respectively, thereby increasing the mixing ratio between the gas-supporting pipeline and the gas, and thus improving the combustion efficiency.

[0049] The burner head 26 is made of metal fiber. The head of the metal fiber burner head can be made into shapes such as flat, cylindrical, conical, concave, and spherical. This structure improves combustion completeness and combustion efficiency.

[0050] Specifically, in some implementations, such as Figure 1 and 3 As shown, the outer surfaces of the boiler 11 and the discharge pipe 3 are provided with an insulation layer 12; wherein, the insulation layer 12 is made of insulation cotton or cement. The insulation layer 12 can reduce excessive temperature loss and improve temperature utilization.

[0051] Specifically, in some implementations, such as Figure 1 As shown, the boiler 11 is provided with at least two first cavities 14, and the two first cavities 14 are arranged opposite to each other; the boiler 11 is also provided with a first movable column 13, which is movably connected to the first cavity 14; and the boiler 11 is also provided with a first pressure detection component 15, which can extend into one of the first cavities 14.

[0052] Specifically, in some implementations, such as Figure 1 and 3As shown, the fully premixed condensing steam boiler also includes a frame 1. The boiler 11, the combustion assembly 2, the first heat exchange assembly, and the second heat exchange assembly 6 are respectively connected inside the frame 1. The boiler 11 is located at the upper end of the frame 1, and the combustion assembly 2 is located at the lower end of the frame 1, directly below the boiler 11. The first heat exchange assembly is located at the upper end of the frame 1 and is in a different vertical plane from the combustion assembly 2. The second heat exchange assembly 6 is located to the side of the boiler 11 and is in a different vertical plane from the combustion assembly 2. By integrating the boiler 11, the combustion assembly 2, the first heat exchange assembly, and the second heat exchange assembly 6 onto the same mounting body through the frame 1, space is utilized efficiently, mutual interference during operation is avoided, and equipment costs are reduced.

[0053] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fully premixed condensing steam boiler, characterized in that, include: A boiler, wherein the boiler has a combustion chamber; the boiler is provided with a first conveying port and a second conveying port; A combustion assembly that extends into and is used for combustion within the combustion cavity; A first heat exchange assembly, comprising a discharge pipe and a first heat exchange component; the input end of the discharge pipe is connected to the first delivery port; the first heat exchange component is connected inside the discharge pipe and is connected to both the input and output ends of the discharge pipe. The second heat exchange assembly includes a heat exchange finned tube, which is connected to the second conveying port. The heat exchange finned tube includes a supporting tube body, a supporting inner frame, outer heat-conducting fins, and a spiral heat exchange section; the outer heat-conducting fins are arranged around the outer surface of the supporting tube body; the supporting tube body has a first inner cavity; the supporting inner frame is located at the opening of the first inner cavity, and the spiral heat exchange section is located at the outlet of the first inner cavity; The inner support frame is provided with at least two first channels, which are connected to the first inner cavity and the outside of the heat exchange finned tube; and / or, the spiral heat exchange part includes an inner support tube, side support blocks and spiral blades; two side support blocks are selected and are respectively located at both ends of the inner support tube; the spiral blades are arranged around the outer surface of the inner support tube; and the side support blocks are provided with at least two first channels, which are connected to the conveying trajectory of the spiral blades.

2. The fully premixed condensing steam boiler according to claim 1, characterized in that, The first heat exchange component includes an energy saver and a condenser; one side of the energy saver is connected to the first inlet; the other side of the energy saver is connected to the condenser; and the condenser is connected to the output end of the discharge pipe.

3. A fully premixed condensing steam boiler according to claim 1 or 2, characterized in that, The second delivery port includes a first diversion port and a second diversion port. The second heat exchange assembly also includes a first delivery pipe and a second delivery pipe. The first delivery pipe is connected to the first diversion port and one end of the heat exchange finned tube, respectively. The second delivery pipe is connected to the second diversion port and the other end of the heat exchange finned tube, respectively. The first diversion port is located below the second diversion port.

4. A fully premixed condensing steam boiler according to claim 3, characterized in that, The second heat exchange assembly further includes a booster pump and a control valve; the booster pump is connected to the first delivery pipe and the heat exchange finned tube respectively; the control valve is connected to the first delivery pipe; and / or, the first delivery pipe is provided with a second pressure detection component.

5. A fully premixed condensing steam boiler according to claim 4, characterized in that, The combustion assembly includes a combustion-supporting gas pipeline, a mixing pipe, a gas pipeline, a burner head, and a mixing fan; the mixing pipe is provided with a first through hole, a second through hole, and a third through hole; the combustion-supporting gas pipeline and the gas pipeline are respectively connected to the first through hole and the second through hole, and the combustion-supporting gas pipeline is used to transport combustion-supporting gas, and the gas pipeline is used to transport gas; the mixing fan is connected to the third through hole; the burner head is connected to the outlet of the mixing fan.

6. A fully premixed condensing steam boiler according to claim 5, characterized in that, The combustion assembly further includes a gas proportional control valve, which is connected to the gas-supporting pipeline and the first through hole respectively; and / or, the burner head is a metal fiber burner head.

7. A fully premixed condensing steam boiler according to claim 1, characterized in that, The outer surfaces of the boiler and the discharge pipe are provided with an insulation layer; The outer insulation layer can be made of insulation cotton or cement.

8. A fully premixed condensing steam boiler according to claim 1, characterized in that, The boiler is provided with at least two first cavities, and the two first cavities are arranged opposite to each other; the boiler is also provided with a first movable column, which is movably connected to the first cavity; and the boiler is also provided with a first pressure detection component, which can extend into one of the first cavities.

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