Fuel steam boiler

Abstract

The utility model discloses a fuel steam boiler, which belongs to the field of steam boilers, and comprises a boiler barrel, and a combustion chamber, a reversal chamber, a first smoke tube assembly, a smoke box and a second smoke tube assembly which are arranged in the boiler barrel, and a feed port and a smoke outlet are formed on the boiler barrel; one side of the reversal chamber is communicated with the first smoke pipe assembly, the other end of the first smoke pipe assembly is communicated with the smoke box, the other end of the smoke box is connected with the second smoke pipe assembly, and the other end of the second smoke pipe assembly is communicated with the smoke outlet. According to the fuel steam boiler, the secondary air inlets, the air blower and the induced draft fan are arranged on the left side and the right side of the hearth of the boiler barrel, so that combustibles can be fully burnt out, heat efficiency is improved, and emission of pollutants is reduced; and meanwhile, through the three-return-stroke design, a downstream combustion structure is formed, and the combustion efficiency and the heat transfer efficiency are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of steam boilers, specifically relating to a fuel steam boiler. Background Technology

[0002] Gas-fired steam boilers are steam boilers that use gas combustion for heating. Most modern steam boilers adopt a two-pass structure to ensure complete fuel combustion, thereby increasing heat exchange and resulting in high boiler thermal efficiency. However, with rapid technological advancements, horizontal steam boilers have replaced traditional vertical steam boilers. Their flames burn under positive pressure in the combustion chamber, offering advantages such as high combustion thermal efficiency, energy saving, and more economical operation.

[0003] However, the existing bedroom combustion boilers are too complex in structure, which greatly affects the combustion efficiency of the fuel and the steam filtration efficiency. Therefore, we have introduced a fuel steam boiler to solve the above problems. Utility Model Content

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, this utility model provides a fuel steam boiler, which has the advantages of simple structure and fast combustion efficiency.

[0005] To achieve the above objectives, this utility model provides a fuel steam boiler, which includes a boiler drum and a combustion chamber, a reburning chamber, a first smoke pipe assembly, a smoke box, and a second smoke pipe assembly disposed within the boiler drum. A feed inlet and a smoke outlet are formed on the boiler drum.

[0006] The combustion chamber is formed on the inner wall of the boiler drum near the bottom, and a furnace is provided in the reburning chamber. The reburning chamber is located at the bottom of the inner wall of the boiler drum and communicates with the combustion chamber. One side of the reburning chamber is connected to the first flue pipe assembly, the other end of the first flue pipe assembly is connected to the smoke box, the other end of the smoke box is connected to the second flue pipe assembly, and the other end of the second flue pipe assembly is connected to the exhaust port.

[0007] As a further improvement of this utility model, the first smoke tube assembly includes a plurality of first smoke tube units;

[0008] Multiple first flue pipe units are arranged vertically and horizontally inside the boiler drum.

[0009] As a further improvement of this utility model, the second smoke tube assembly includes a plurality of second smoke tube units;

[0010] Multiple second flue pipe units are arranged laterally inside the boiler drum; and the side view projection surfaces of the multiple flue pipe units are arranged in a honeycomb pattern at intervals.

[0011] As a further improvement of this utility model, a water-cooling assembly is provided between the re-ignition chamber and the combustion chamber;

[0012] The water-cooling assembly includes multiple water pipes spaced laterally.

[0013] As a further improvement of this utility model, water wall pipes are embedded on the left and right sides of the furnace.

[0014] As a further improvement of this utility model, air inlets are formed on the left and right sides of the furnace; and a blower and an induced draft fan are respectively provided for the two air inlets.

[0015] As a further improvement of this utility model, it also includes an emission treatment system;

[0016] The emission treatment system is installed at the exhaust port and is used to treat the emitted flue gas.

[0017] As a further improvement of this utility model, the emission treatment system includes an atmospheric pressure energy saver, a dust collector, a chimney, and a negative pressure fan arranged in sequence.

[0018] The atmospheric pressure energy-saving device is connected to the flue gas outlet, and the negative pressure fan is connected to the chimney. The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0019] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0020] This utility model of a fuel-fired steam boiler features secondary air inlets, blowers, and induced draft fans arranged on both sides of the furnace chamber, ensuring complete combustion of combustibles, improving thermal efficiency, and reducing pollutant emissions. Simultaneously, a three-pass design (first pass: combustion chamber - re-combustion chamber; second pass: re-combustion chamber - first smoke tube assembly - smoke box; third pass: smoke box - second smoke tube assembly - exhaust port) forms a co-current combustion structure, significantly improving combustion and heat transfer efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main view cross-sectional structure of the fuel steam boiler in this embodiment of the present invention;

[0022] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Feeding assembly; 2. Combustion chamber; 3. Water cooling assembly; 4. Recirculation chamber; 5. First smoke pipe assembly; 6. Smoke box; 7. Second smoke pipe assembly; 8. Exhaust port; 9. Atmospheric pressure economizer; 10. Dust collector; 11. Chimney; 12. Negative pressure fan. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Please see Figure 1 The fuel-fired steam boiler in the preferred embodiment of this utility model has secondary air inlets, blowers and induced draft fans arranged on the left and right sides of the furnace of the boiler drum, which enables the combustibles to be fully burned, improves thermal efficiency and reduces the emission of pollutants. At the same time, through the three-pass design (first pass: combustion chamber 2-reburning chamber 4, second pass: reburning chamber 4-first smoke tube assembly 5-smoke box 6, third pass: smoke box 6-second smoke tube assembly 7-exhaust port 8), a co-current combustion structure is formed, which greatly improves combustion efficiency and heat transfer efficiency.

[0026] Specifically, in a preferred embodiment of the present invention, it includes a boiler drum and a combustion chamber 2, a reburning chamber 4, a first smoke pipe assembly 5, a smoke box 6, and a second smoke pipe assembly 7 disposed within the boiler drum. A feed inlet and a smoke outlet 8 are formed on the boiler drum. The combustion chamber 2 is formed on the inner wall of the boiler drum near the bottom, and a furnace is disposed in the reburning chamber 4. The reburning chamber 4 is located at the bottom of the inner wall of the boiler drum and communicates with the combustion chamber 2. One side of the reburning chamber 4 communicates with the first smoke pipe assembly 5, the other end of the first smoke pipe assembly 5 communicates with the smoke box 6, the other end of the smoke box 6 is connected to the second smoke pipe assembly 7, and the other end of the second smoke pipe assembly 7 communicates with the smoke outlet 8.

[0027] More specifically, such as Figure 1 As shown, the first flue assembly 5 includes multiple first flue units; the multiple first flue units are arranged horizontally within the boiler drum along a vertical axis. The second flue assembly 7 includes multiple second flue units;

[0028] Meanwhile, multiple second flue pipe units are arranged laterally inside the boiler drum; and the side view projection surfaces of the multiple flue pipe units are arranged in a honeycomb pattern.

[0029] More specifically, a water-cooling assembly 3 is provided between the combustion chamber 4 and the combustion chamber 2; the water-cooling assembly 3 includes multiple water pipes spaced laterally. In addition, water wall pipes are embedded on the left and right sides of the furnace.

[0030] Furthermore, to ensure more complete combustion of fuel in the furnace, air inlets are formed on both the left and right sides of the furnace; at the same time, blowers and induced draft fans are respectively installed corresponding to the two air inlets, so that the combustibles can be fully burned, improving thermal efficiency and reducing the emission of pollutants.

[0031] The steam boiler in the preferred embodiment of this utility model further includes an emission treatment system; the emission treatment system is installed at the flue gas outlet 8 and is used to treat the emitted flue gas.

[0032] Specifically, such as Figure 1 As shown, the emission treatment system includes an atmospheric pressure energy saver 9, a dust collector 10, a chimney 11, and a negative pressure fan 12, which are connected in sequence; the atmospheric pressure energy saver 9 is connected to the flue gas outlet 8, and the negative pressure fan 12 is connected to the chimney 11.

[0033] In addition, the steam boiler in the preferred embodiment of this utility model also includes a feeding assembly 1, which is disposed at the feeding inlet and is used to feed biomass fuel into the boiler drum.

[0034] It is worth noting that the aforementioned biomass fuels can generally be understood as new types of clean fuels made from agricultural and forestry waste such as straw, rice straw, leaves, branches, wood chips, shavings, and sugarcane bagasse as raw materials, through the addition of high-efficiency additives and processes such as crushing, extrusion, and drying.

[0035] The fuel steam boiler of this utility model adopts a horizontal quick-installation water-fire tube fixed grate type co-current combustion structure. The feeding assembly 1 sends biomass briquettes into the combustion chamber 2 for combustion. The generated high-temperature flue gas flame is radiated and heat absorbed by the water-cooling assembly 3 in the furnace. After passing through the combustion chamber 4, it enters the first smoke assembly (low-temperature zone smoke tube) in the second pass for convective heat exchange. Then, it passes through the smoke box 6 and turns to the second smoke tube assembly 7 in the third pass for convective heat transfer. Finally, it becomes low-temperature flue gas and is discharged from the exhaust port 8. Then, it enters the atmospheric pressure economizer 9 to absorb heat. After being treated by the dust collector 10, it is finally drawn by the negative pressure fan 12 and discharged into the atmosphere through the chimney 11.

[0036] This utility model of a fuel-fired steam boiler features secondary air inlets, blowers, and induced draft fans arranged on both sides of the furnace chamber, ensuring complete combustion of combustibles, improving thermal efficiency, and reducing pollutant emissions. Simultaneously, a three-pass design (first pass: combustion chamber - re-combustion chamber; second pass: re-combustion chamber - first smoke tube assembly - smoke box; third pass: smoke box - second smoke tube assembly - exhaust port) forms a co-current combustion structure, significantly improving combustion and heat transfer efficiency.

[0037] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fuel-fired steam boiler, characterized in that, It includes a boiler drum and a combustion chamber (2), a reburning chamber (4), a first smoke pipe assembly (5), a smoke box (6), and a second smoke pipe assembly (7) disposed in the boiler drum, with a feed inlet and a smoke outlet (8) formed on the boiler drum; The combustion chamber (2) is formed on the inner wall of the boiler drum near the bottom, and the furnace is set in the combustion chamber (4). The combustion chamber (4) is located at the bottom of the inner wall of the boiler drum and communicates with the combustion chamber (2). One side of the combustion chamber (4) is connected to the first flue assembly (5). The other end of the first flue assembly (5) is connected to the smoke box (6). The other end of the smoke box (6) is connected to the second flue assembly (7). The other end of the second flue assembly (7) is connected to the exhaust port (8).

2. The fuel-fired steam boiler according to claim 1, characterized in that, The first smoke tube assembly (5) includes a plurality of first smoke tube units; Multiple first flue pipe units are arranged vertically inside the boiler drum.

3. The fuel-fired steam boiler according to claim 2, characterized in that, The second smoke tube assembly (7) includes a plurality of second smoke tube units; Multiple second flue pipe units are arranged laterally inside the boiler drum; and the side view projection surfaces of the multiple flue pipe units are arranged in a honeycomb pattern at intervals.

4. The fuel-fired steam boiler according to claim 1, characterized in that, A water-cooling assembly (3) is provided between the combustion chamber (4) and the combustion chamber (2); The water-cooling assembly (3) includes a plurality of water pipes spaced laterally.

5. The fuel-fired steam boiler according to claim 4, characterized in that, Water wall pipes are embedded on both sides of the furnace.

6. The fuel-fired steam boiler according to claim 1, characterized in that, Air inlets are formed on the left and right sides of the furnace; and a blower and an induced draft fan are respectively provided for the two air inlets.

7. The fuel-fired steam boiler according to any one of claims 1 to 6, characterized in that, It also includes emission treatment systems; The emission treatment system is located at the exhaust port (8) and is used to treat the emitted flue gas.

8. The fuel-fired steam boiler according to claim 7, characterized in that, The emission treatment system includes an atmospheric pressure energy saver (9), a dust collector (10), a chimney (11), and a negative pressure fan (12) arranged in sequence. The atmospheric pressure energy saver (9) is connected to the flue gas outlet (8), and the negative pressure fan (12) is connected to the chimney (11).

9. The fuel-fired steam boiler according to claim 1, characterized in that, It also includes a feeding assembly (1), which is located at the feed inlet and is used to feed biomass fuel into the boiler drum.

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