Biomass boiler combusting double fuels
By designing a biomass boiler that burns two fuels, the problems of regional capacity limitations and nitrogen oxide emissions in biomass boilers have been solved, achieving efficient combustion and heat recovery, and improving steam quality and thermal efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-03-24
AI Technical Summary
Biomass boilers are limited by regional production capacity, produce nitrogen oxides during combustion, and do not fully utilize heat, resulting in energy waste.
Design a dual-fuel biomass boiler comprising a furnace, cooling chamber, water-cooled chamber, feeder, inclined grate, serpentine processing tube, and denitrification section. It is capable of simultaneously burning solid and liquid fuels and recovering flue gas heat through high-temperature and low-temperature superheaters and economizers. The denitrification section reduces nitrogen oxide emissions.
It solved the problem of limited biomass fuel production capacity, reduced nitrogen oxide emissions, improved steam quality and boiler thermal efficiency, and reduced energy waste.
Smart Images
Figure CN224033774U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of biomass boiler, especially to a kind of biomass boiler of dual-fuel combustion. BACKGROUND
[0002] Industrial boiler is the key equipment of energy consumption and conversion, and biomass energy has become one of the focuses in the energy field due to its renewable and "zero" carbon dioxide emission advantages, and occupies an increasingly important position in the selection of industrial boiler fuel.
[0003] As an ideal clean energy, biomass is often limited by regional fuel production capacity and cannot meet the needs of enterprises. At the same time, with the continuous improvement of environmental protection standards, the traditional biomass boiler will produce a certain amount of nitrogen oxides during combustion, which may affect emissions, and the design of the heating surface of the traditional biomass boiler may not be conducive to the utilization and absorption of energy, which may not be able to fully absorb the heat generated by combustion, resulting in a large amount of heat being discharged with flue gas, causing serious waste of energy. SUMMARY
[0004] The utility model discloses a kind of biomass boiler of dual-fuel combustion to solve the problems raised in the above background.
[0005] To achieve the above object, the utility model adopts the following technical scheme:
[0006] A kind of biomass boiler of dual-fuel combustion, comprising:
[0007] The furnace body is installed on the support part;
[0008] The furnace body is composed of hearth and cooling chamber;
[0009] Water cooling chamber is fixedly connected to the furnace body;
[0010] Feeder is fixedly connected to the furnace body;
[0011] Grate is fixedly connected in the furnace body, and the grate is located below the hearth;
[0012] First processing pipe and second processing pipe are fixedly connected to the support part, and the first processing pipe is communicated with the second processing pipe;
[0013] The end of the first processing pipe away from the second processing pipe is communicated with the cooling chamber.
[0014] Preferably, high-temperature superheater, low-temperature superheater and high-temperature economizer are fixedly connected in the first processing pipe from bottom to top.
[0015] Further, the second processing pipe is fixedly connected with a denitration part, a low-temperature economizer and an air preheater from top to bottom.
[0016] Further, the first processing pipe and the second processing pipe are both serpentine pipes.
[0017] Preferably, the grate is an inclined reciprocating grate.
[0018] Further, the low-temperature economizer is a double-H finned tube structure.
[0019] Compared with the prior art, the biomass boiler provided by the present application has the following beneficial effects:
[0020] The parts not involved in the device are the same as or can be realized by the prior art, the biomass boiler provided by the present application can simultaneously combust solid biomass fuel and liquid fuel, effectively solves the problem that the biomass fuel is limited by regional production capacity, and is equipped with a denitration part, can effectively reduce the emission of nitrogen oxides in flue gas, meets the environmental protection requirements, and at the same time, is provided with a high-temperature superheater, a low-temperature superheater, a high-temperature economizer and a low-temperature economizer, fully recovers the heat in the flue gas, improves the steam quality and the thermal efficiency of the boiler. The air preheater uses the waste heat of flue gas to heat air, further promotes the full combustion of fuel, and reduces energy waste. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 A structure schematic view of the biomass boiler provided by the present application is shown in the figure;
[0022] Figure 2 A structure schematic view of the furnace and the cooling chamber in the biomass boiler provided by the present application is shown in the figure;
[0023] Figure 3 A structure schematic view of the water cooling chamber in the biomass boiler provided by the present application is shown in the figure.
[0024] In the figure: 1, a feeder; 2, a grate; 3, a water cooling chamber; 4, a furnace; 5, a cooling chamber; 6, a high-temperature superheater; 7, a low-temperature superheater; 8, a high-temperature economizer; 9, a denitration part; 10, a low-temperature economizer; 11, an air preheater; 12, a support part; 13, a first processing pipe; 14, a second processing pipe. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments.
[0026] Embodiment 1:
[0027] Referring to Figures 1-3 A biomass boiler burning dual fuel, comprising:
[0028] A furnace body installed on a support part 12;
[0029] The furnace body is composed of a hearth 4 and a cooling chamber 5;
[0030] A water cooling chamber 3 fixedly connected to the furnace body;
[0031] A feeder 1 fixedly connected to the furnace body;
[0032] A grate 2 fixedly connected in the furnace body, and the grate 2 is located directly below the hearth 4;
[0033] A first treatment pipe 13 and a second treatment pipe 14, both of which are fixedly connected to the support part 12, and the first treatment pipe 13 is in communication with the second treatment pipe 14;
[0034] The end of the first treatment pipe 13 away from the second treatment pipe 14 is in communication with the cooling chamber 5.
[0035] The high-temperature superheater 6, the low-temperature superheater 7, and the high-temperature economizer 8 are fixedly connected in the first treatment pipe 13 from bottom to top.
[0036] The denitration part 9, the low-temperature economizer 10, and the air preheater 11 are fixedly connected in the second treatment pipe 14 from top to bottom.
[0037] Referring to Figure 1 The hearth 4, the cooling chamber 5, the first treatment pipe 13, and the second treatment pipe 14 are combined to form an M-shaped structure.
[0038] The first treatment pipe 13 and the second treatment pipe 14 are both serpentine pipes.
[0039] The grate 2 is an inclined reciprocating grate.
[0040] The low-temperature economizer 10 is a double-H finned tube structure.
[0041] The low-temperature economizer 10 adopts a double-H finned tube structure, has excellent wear resistance, prolongs the service life of the equipment, and reduces maintenance costs
[0042] Referring to Figure 1 In the specific boiler operation process, the solid biomass fuel is delivered to the inclined reciprocating grate 2 by the feeder 1 and burned on the grate 2; when liquid fuel needs to be mixed and burned, it is burned through the water cooling chamber 3 of the combustion machine, and because there is a flame on the grate 2, it can ensure that the liquid fuel is fully and safely burned.
[0043] The high-temperature flue gas generated by combustion firstly enters the furnace 4, and the furnace 4 is surrounded by membrane water cooling walls, which can effectively absorb heat, protect the furnace body and generate steam; the high-temperature flue gas then enters the cooling chamber 5, and the cooling chamber 5 also adopts a membrane water cooling wall structure to cool the flue gas and avoid the problem of ash deposition caused by the direct impact of high-temperature flue gas on the superheater.
[0044] The flue gas cooled in the cooling chamber 5 enters the first treatment pipe 13, and successively passes through the high-temperature superheater 6, the low-temperature superheater 7 and the high-temperature economizer 8, so that the heat in the flue gas is fully absorbed, and the steam is further superheated and heated; then, the flue gas enters the second treatment pipe 14, is subjected to denitration treatment in the denitration part 9 to reduce the emission of nitrogen oxides, and then passes through the low-temperature economizer 10 to further recover waste heat, and finally is discharged through the air preheater 11, while heating the air entering the furnace 4.
[0045] The application can simultaneously combust solid biomass fuel and liquid fuel, effectively solves the problem of regional production capacity limitation of biomass fuel, is equipped with the denitration part 9, can effectively reduce the emission of nitrogen oxides in the flue gas, meets the environmental protection requirement, and is provided with the high-temperature superheater 6, the low-temperature superheater 7, the high-temperature economizer 8 and the low-temperature economizer 10, so that the heat in the flue gas is fully recovered, the steam quality and the boiler thermal efficiency are improved, the air preheater 11 heats the air by using the waste heat of the flue gas, further promotes the full combustion of the fuel, and reduces energy waste.
[0046] The above describes only the preferred specific implementation manner of the application, but the protection scope of the application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.
Claims
1. A dual fuel biomass boiler, characterized in that, Include: The furnace body is installed on the support part (12); The furnace body is composed of a hearth (4) and a cooling chamber (5); Water cooling chamber (3), fixedly connected to the furnace body; Feeder (1), fixedly connected to the furnace body; Grate (2), fixedly connected in the furnace body, and the grate (2) is located directly below the hearth (4); The first treatment pipe (13) and the second treatment pipe (14) are both fixedly connected to the support part (12), and the first treatment pipe (13) and the second treatment pipe (14) are communicated. The end of the first treatment pipe (13) away from the second treatment pipe (14) is communicated with the cooling chamber (5).
2. A dual fuel biomass boiler according to claim 1, characterized in that, The high-temperature superheater (6), the low-temperature superheater (7) and the high-temperature economizer (8) are fixedly connected in the first treatment pipe (13) from bottom to top.
3. A dual fuel biomass boiler according to claim 2, characterized in that The denitration part (9), the low-temperature economizer (10) and the air preheater (11) are fixedly connected in the second treatment pipe (14) from top to bottom.
4. A dual fuel biomass boiler according to claim 2, wherein The first treatment pipe (13) and the second treatment pipe (14) are both serpentine pipes.
5. A dual fuel biomass boiler according to claim 1, characterized in that, The grate (2) is an inclined reciprocating grate.
6. A dual fuel biomass boiler according to claim 3, wherein, The low-temperature economizer (10) is a double H type finned tube structure.