Biomass steam generator

Abstract

The utility model relates to the technical field of steam generators, in particular to a biomass steam generator which is structurally characterized in that the biomass steam generator comprises a furnace pipe with the inner water capacity not larger than 30 L, a combustion chamber is installed at the lower end of the furnace pipe, a single-layer finned pipe is annularly arranged on the periphery of the furnace pipe, and an inner double-coil pipe is arranged outside the single-layer finned pipe; an inner double-coil pipe and a single-layer finned pipe form a first flue, an outer double-coil pipe is arranged outside the inner double-coil pipe, the inner double-coil pipe and the outer double-coil pipe form a second flue, a smoke outlet is formed in an outlet of the second flue, a double-layer finned pipe is arranged between the inner double-coil pipe and the outer double-coil pipe, and a steam outlet is formed in the upper portion of the single-layer finned pipe. Biomass is combusted in the furnace pipe, then enters a flue gas channel formed by the inner double-coil pipe and the single-layer finned tube energy saver, finally passes through a flue gas channel formed by the inner double-coil pipe and the outer double-coil pipe and the double-layer finned tube between the inner double-coil pipe and the outer double-coil pipe to recycle heat, and convective heat transfer is conducted again. The heat efficiency of the energy saver is improved, and the dust content of smoke is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to steam generator technical field especially is biomass steam generator. BACKGROUND

[0002] Steam generator is the mechanical equipment that water is heated to steam by using the heat energy of fuel or other energy. Steam generator can be divided into electromagnetic steam generator, electric steam generator, fuel oil steam generator, gas steam generator according to fuel classification.

[0003] The category of boiler in " special equipment safety supervision regulations " is regulated as the water capacity in boiler liner is greater than or equal to 30L;However, steam generator water capacity is less than 30L, not belonging to the category of " special equipment safety supervision regulations ". Reduce the production requirement, save the installation and use cost. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem in the above background technology.

[0005] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0006] Biomass steam generator, its structural characteristics include the furnace liner of the inner water capacity not more than 30L, the lower end of the furnace liner is installed with combustion chamber, the periphery of the furnace liner is ringed with single layer finned tube, the outside of single layer finned tube is equipped with inner double pipe, and inner double pipe and single layer finned tube constitute first flue, the outside of inner double pipe is equipped with outer double pipe, and inner double pipe and outer double pipe constitute second flue, and the outlet of second flue is equipped with smoke outlet, and the double layer finned tube is arranged between inner double pipe and outer double pipe, and the upper portion of single layer finned tube is equipped with steam outlet.

[0007] As an improved technical scheme, the single layer finned tube includes a plurality of parallel arranged vertical pipes, and gaps exist between the vertical pipes, and the inner double pipe is arranged outside the single layer finned tube, and the inner double pipe is arranged around the furnace liner, and the upper end of the vertical pipe is communicated with the first upper header through the upper tube plate, and the lower end of the vertical pipe is communicated with the first lower header through the lower tube plate, and the steam outlet is arranged on the upper portion of the first upper header.

[0008] As an improved technical scheme, the upper end of the single layer finned tube is provided with a separation mechanism, the separation mechanism includes a separation plate arranged at the upper end of the single layer finned tube, a gas outlet hole is formed in the separation plate, a steam-water separation connecting rod is arranged at the lower portion of the separation plate, a plurality of separation discs are arranged on the steam-water separation connecting rod, and a separation ring is arranged on the inner wall of the single layer finned tube between adjacent separation discs.

[0009] As an improved technical scheme, the double-layer finned tube comprises an outer finned tube and an inner finned tube, gaps for passing flue gas are arranged on the outer finned tube and the inner finned tube, upper ends of the outer finned tube and the inner finned tube are communicated with an economizer upper header through an economizer upper tube plate, and lower ends of the outer finned tube and the inner finned tube are communicated with an economizer lower header through an economizer lower tube plate.

[0010] As an improved technical scheme, the inner double-coil pipe is arranged outside the single-layer finned tube in a spiral manner from bottom to top; and the outer double-coil pipe is arranged outside the double-layer finned tube in a spiral manner from top to bottom.

[0011] As an improved technical scheme, the first upper header is internally provided with a refractory layer, an observation hole penetrating through the refractory layer is arranged at a central position of the first upper header, and the upper portion of the furnace barrel is provided with a biomass feeder.

[0012] As an improved technical scheme, the combustion chamber is internally provided with a grate, heat-insulating layers are arranged on both sides of the combustion chamber, an ignition mechanism is arranged on both sides of the combustion chamber, a dust falling hopper and an air distribution chamber are arranged below the combustion chamber, and a blower is arranged on the side of the dust falling hopper and the air distribution chamber.

[0013] The biomass is combusted in the furnace barrel, radiation heat transfer is performed, a first flue is formed, and then the second flue formed by the inner double-coil pipe and the outer double-coil pipe is used for performing convection heat transfer again, the double-layer finned tube between the inner double-coil pipe and the outer double-coil pipe is used for recycling heat, and the heat efficiency of the economizer is improved and the dust content of flue gas is reduced through multiple heat transfer and multiple flue gas turning. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view structural schematic view of the utility model;

[0015] Figure 2 It is a front view structural schematic view of the utility model; Figure 1

[0016] Figure 3 It is a front view structural schematic view of the utility model; Figure 1

[0017] Figure 4 It is a front view structural schematic view of the utility model; Figure 1

[0018] ​​​In the figure: 1, ash chute and air distribution chamber; 2, air blower; 3, grate; 4, heat insulation layer; 5, ignition mechanism; 6, biomass feeder; 7, lower header; 8, single-layer finned tube; 9, furnace; 10, upper header; 11, inner double coil; 12, double-layer finned tube; 13, outer finned tube; 14, inner finned tube; 15, economizer lower header; 16, economizer upper header; 18, outer double coil; 19, smoke outlet; 20, steam-water separation connecting rod; 21, separation ring; 22, separation disc; 23, separation plate; 24, lower tube plate; 25, upper tube plate; 26, steam outlet; 27, refractory layer; 28, fire observation hole; 29, blocking plate; 30, support tube. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] Referring to Figures 1-4 As shown in the figure, the biomass steam generator comprises a furnace 9 with an inner water capacity of not more than 30L, a combustion chamber is installed at the lower end of the furnace 9, a grate 3 is arranged in the combustion chamber, heat insulation layers 4 are arranged on both sides of the combustion chamber, an ignition mechanism 5 is installed on both sides of the combustion chamber, an ash chute and air distribution chamber 1 is arranged below the combustion chamber, and an air blower 2 is arranged on the side of the ash chute and air distribution chamber 1. A single-layer finned tube 8 is arranged around the periphery of the furnace 9, the single-layer finned tube 8 comprises a plurality of vertical pipes arranged in parallel, gaps exist between the vertical pipes, an inner double coil 11 is arranged outside the single-layer finned tube 8, the inner double coil 11 surrounds the furnace 9, a first upper header 10 is communicated with the upper ends of the vertical pipes through a upper tube plate 25, a first lower header 7 is communicated with the lower ends of the vertical pipes through a lower tube plate 24, and a steam outlet 26 is arranged on the upper part of the first upper header 10. A separation mechanism is arranged at the upper end of the single-layer finned tube 8, the separation mechanism comprises a separation plate 23 arranged at the upper end of the single-layer finned tube 8, gas outlet holes are arranged on the separation plate 23, a steam-water separation connecting rod 20 is arranged at the lower part of the separation plate 23, a plurality of separation discs 22 are arranged on the steam-water separation connecting rod 20, and separation rings 21 are arranged on the inner walls of the single-layer finned tube 8 between adjacent separation discs 22.

[0021] The single-layer finned tube 8 has an inner double coil 11 on its outside, which spirally coils around the outside of the single-layer finned tube 8 from top to bottom. A sealing plate 29 is provided at the lower part of the inner double coil 11. The inner double coil 11 and the single-layer finned tube 8 form a first flue. An outer double coil 18 is provided outside the inner double coil 11. The inner double coil 11 and the outer double coil 18 form a second flue. The outlet of the second flue has a smoke outlet 19. A double-layer finned tube 12 is provided between the inner double coil 11 and the outer double coil 18. The double-layer finned tube 12 includes an outer finned tube 13 and an inner finned tube 14. The outer finned tube 13 and the... Each inner finned tube 14 has gaps for flue gas passage. The upper ends of the outer finned tube 13 and the inner finned tube 14 are connected to the upper header 16 of the energy-saving device via the upper tube plate 25. The lower ends of the outer finned tube 13 and the inner finned tube 14 are connected to the lower header 15 of the energy-saving device via the lower tube plate 24. A support pipe 30 is provided at the lower part of the lower header 15. The double-layer finned tube 12 and the inner double coil 11 form a second flue. An outer double coil 18 is provided outside the double-layer finned tube 12. The outer double coil 18 is spirally coiled around the outside of the double-layer finned tube 12 from top to bottom. A steam outlet 26 is provided at the upper part of the single-layer finned tube 8. The interior of the first upper header 10 is provided with a refractory layer 27. A viewing hole 28 penetrating the refractory layer 27 is opened at the edge of the first upper header 10. A biomass feeder 6 is provided at the upper part of the furnace liner 9.

[0022] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0023] Example of biomass combustion and flue gas flow direction: At this point, the biomass from the biomass feeding device in the finished circular finned tube biomass steam generator falls onto the grate 3 and is burned under the action of the ignition device. The heat generated by the combustion is contained in the furnace 9.

[0024] The first flue, consisting of the inner double coil 11 and the single-layer finned tube, allows flue gas to exit and enter the second flue, which consists of the inner and outer double coils. Simultaneously, the double-layer finned tubes in the second flue are heated, undergoing convective heat transfer again. The double-layer finned tubes between the inner and outer double coils can also recover heat. Through multiple heat transfers and flue gas reversals, the thermal efficiency of the energy-saving device is improved, and the dust content in the flue gas is reduced. The flue gas descends to the bottom of the double-row finned tube energy-saving device, where it exits from the second flue.

[0025] Water and steam flow direction embodiment: water enters from the lower part of the outer double pipe 18, comes out from the upper part of the outer double pipe 18, comes out from the upper header tank 16 of the economizer after being heated by the lower header tank 15 of the economizer, enters the lower part of the inner double pipe, then comes out from the upper part of the inner double pipe, enters the lower header tank 7 through the check valve, and finally comes out as water vapor through the upper header tank 10 and the steam outlet.

[0026] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A biomass steam generator, characterized by, The application relates to a biomass combustion furnace, which comprises a furnace body (9) with an inner water capacity of not more than 30L, a combustion chamber is arranged at the lower end of the furnace body (9), a single-layer finned tube (8) is arranged around the periphery of the furnace body (9), an inner double pipe (11) is arranged outside the single-layer finned tube (8), the inner double pipe (11) and the single-layer finned tube (8) form a first flue, an outer double pipe (18) is arranged outside the inner double pipe (11), the inner double pipe (11) and the outer double pipe (18) form a second flue, an outlet (19) is arranged at the outlet of the second flue, a double-layer finned tube (12) is arranged between the inner double pipe (11) and the outer double pipe (18), and a steam outlet (26) is arranged at the upper portion of the single-layer finned tube (8).

2. The biomass steam generator of claim 1, wherein The single-layer finned tube (8) comprises a plurality of parallel arranged vertical tubes, gaps exist between the vertical tubes, the inner double pipe (11) is arranged outside the single-layer finned tube (8), the inner double pipe (11) surrounds the furnace body (9), the upper end of the vertical tube is communicated with a first upper header (10) through an upper tube plate (25), the lower end of the vertical tube is communicated with a first lower header (7) through a lower tube plate (24), and the steam outlet (26) is arranged at the upper portion of the first upper header (10).

3. The biomass steam generator of claim 1, wherein The upper end of the single-layer finned tube (8) is provided with a separation mechanism, the separation mechanism comprises a separation plate (23) arranged at the upper end of the single-layer finned tube (8), gas outlet holes are formed in the separation plate (23), a steam-water separation connecting rod (20) is arranged at the lower portion of the separation plate (23), a plurality of separation discs (22) are arranged on the steam-water separation connecting rod (20), and separation rings (21) are arranged on the inner wall of the single-layer finned tube (8) between adjacent separation discs (22).

4. The biomass steam generator of claim 1, wherein The double-layer finned tube (12) comprises an outer finned tube (13) and an inner finned tube (14), gaps for passing flue gas are formed in the outer finned tube (13) and the inner finned tube (14), the upper end of the outer finned tube (13) and the inner finned tube (14) is communicated with an economizer upper header (16) through an economizer upper tube plate (25), and the lower end of the outer finned tube (13) and the inner finned tube (14) is communicated with an economizer lower header (15) through an economizer lower tube plate (24).

5. The biomass steam generator of claim 1, wherein The inner double pipe (11) is spirally arranged outside the single-layer finned tube (8) from bottom to top, and the outer double pipe (18) is spirally arranged outside the double-layer finned tube (12) from top to bottom.

6. The biomass steam generator of claim 2, wherein A refractory layer (27) is arranged in the first upper header (10), an observation hole (28) penetrating through the refractory layer (27) is formed in the central position of the first upper header (10), and a biomass feeder (6) is arranged at the upper portion of the furnace body (9).

7. The biomass steam generator of claim 1, wherein A grate (3) is arranged in the combustion chamber, heat insulation layers (4) are arranged at the two sides of the combustion chamber, ignition mechanisms (5) are arranged at the two sides of the combustion chamber, and an ash falling hopper and an air distribution chamber (1) are arranged below the combustion chamber, an air blower (2) is arranged at the side of the ash falling hopper and the air distribution chamber (1).

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