Biomass briquetting fuel cooking furnace suitable for plateau area

Abstract

The utility model provides a biomass briquette fuel cooking stove suitable for a plateau area, and relates to the technical field of cookers. The cooking furnace comprises a furnace body, a fire grate and an air supply system. The furnace body comprises a primary combustion chamber and a secondary combustion chamber which are communicated with each other; the second-stage combustion chamber is relatively positioned above the first-stage combustion chamber; the first-stage combustion chamber is used for combusting fixed carbon in biomass briquette fuel, and the second-stage combustion chamber is used for combusting volatile components in the biomass briquette fuel. The fire grate is arranged in the first-stage combustion chamber and used for containing biomass briquette fuel. And the mounting height of the fire grate in the primary combustion chamber is adjustable. The air supply system communicates with the first-stage combustion chamber and the second-stage combustion chamber, the combustion efficiency is high, and the device is suitable for plateau areas with the low oxygen content in air.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cooking utensils, and particularly relates to a biomass briquette fuel cooking stove suitable for plateau regions. BACKGROUND

[0002] Biomass briquette fuel refers to the fuel with a certain shape obtained by drying, crushing and compressing agricultural and forestry wastes. The biomass briquette fuel is divided into two categories, biomass pellet fuel and biomass briquette fuel, in terms of shape. The biomass pellet fuel has a diameter of about 8mm and has the advantages of resistance to combustion and easy transportation. The biomass briquette fuel has a length, width and height of 30mm*30mm*70mm. The energy consumption of the forming process of the biomass briquette fuel is much lower than that of the pellet fuel, and the price is cheaper, which is 1 / 3 to 1 / 2 of the price of the pellet fuel, and is more economical and practical. Moreover, a large amount of cow and sheep manure is produced in the agricultural and pastoral areas every year. If the cow and sheep manure and straw are processed into biomass briquette fuel, and the use of the biomass briquette fuel is vigorously promoted, it will have important significance for the environmental protection and energy reform of the local area.

[0003] At present, the traditional stove used by farmers and herdsmen is not suitable for biomass briquette fuel. This is mainly because the biomass briquette fuel has a high volatile content and a low fixed carbon content, and the internal density is large. The traditional stove will cause uneven heat transfer in the biomass briquette fuel, and thus incomplete combustion, emission of pollutants and other problems. In addition, in some plateau regions, the oxygen content in the air is low. If the air supply mode is not suitable, the air-fuel ratio will not match, which not only cannot burn efficiently, but also cannot be ignited. SUMMARY

[0004] The utility model aims at providing a biomass briquette fuel cooking stove suitable for plateau regions, which improves the combustion efficiency, saves energy and reduces emissions, and is especially suitable for plateau regions with low oxygen content in the air.

[0005] The utility model provides a biomass briquette fuel cooking stove suitable for plateau regions, which comprises:

[0006] A stove body, wherein the stove body comprises a primary combustion chamber and a secondary combustion chamber which are in communication with each other, the secondary combustion chamber is located above the primary combustion chamber, the primary combustion chamber is used for burning the fixed carbon in the biomass briquette fuel, and the secondary combustion chamber is used for burning the volatile matter in the biomass briquette fuel.

[0007] A grate, wherein the grate is arranged in the primary combustion chamber and is used for placing the biomass briquette fuel, and the installation height of the grate in the primary combustion chamber is adjustable.

[0008] An air supply system, wherein the air supply system is in communication with the primary combustion chamber and the secondary combustion chamber respectively.

[0009] In an optional embodiment, the primary combustion chamber is provided with a plurality of grate supports in the height direction, and the grate supports are used for placing the grates; the grates are installed on the grate supports at different heights according to the content of volatile matter in the biomass briquette fuel.

[0010] In an optional embodiment, each of the grate supports comprises a plurality of limiting blocks distributed in the circumferential direction of the inner wall of the furnace body; and the plurality of limiting blocks are used for placing the grates.

[0011] In an optional embodiment, the air supply system comprises a blower, an air supply pipeline, a primary air pipeline and a secondary air pipeline; one end of the air supply pipeline is in communication with the blower, and the other end is connected with the primary air pipeline and the secondary air pipeline respectively.

[0012] The primary air pipeline surrounds the lower part of the primary combustion chamber, and the primary air pipeline is provided with a primary air through hole in communication with the primary combustion chamber; and the secondary air pipeline is used for communicating with the secondary combustion chamber.

[0013] In an optional embodiment, the primary air pipeline is provided with a plurality of groups of the primary air through holes in the height direction, and the primary air through holes in each group are uniformly distributed; the diameter of the primary air through hole close to the air supply pipeline connection port is small, and the diameter of the primary air through hole far from the air supply pipeline connection port is large.

[0014] In an optional embodiment, the connection part of the primary combustion chamber and the secondary combustion chamber forms a necking.

[0015] In an optional embodiment, the secondary air pipeline surrounds the necking.

[0016] In an optional embodiment, the blower is connected with four air supply pipelines; two symmetrically arranged air supply pipelines are connected with the two ends of the corresponding side wall of the primary air pipeline respectively, and the other two symmetrically arranged air supply pipelines are connected with the two ends of the corresponding side wall of the secondary air pipeline respectively.

[0017] In an optional embodiment, the side wall of the furnace body is provided with a thermal insulation interlayer.

[0018] In an optional embodiment, the system further comprises a feeding pipeline, a chimney and a water tank; the chimney and the feeding pipeline are in communication with the secondary combustion chamber respectively; and the chimney is at least partially arranged in the water tank, so that the water tank and the chimney exchange heat.

[0019] This utility model provides a biomass briquette fuel stove suitable for high-altitude areas. Through a structure that couples a primary combustion chamber and a secondary combustion chamber, the primary combustion chamber burns the fixed carbon in the biomass briquette fuel, while the secondary combustion chamber burns the volatile matter. This achieves complete combustion, saves energy, and reduces pollutant emissions. Furthermore, it is equipped with an air supply system to ensure complete combustion, making it particularly suitable for high-altitude areas with low oxygen content. In addition, the grate's installation height within the primary combustion chamber is adjustable to accommodate biomass briquette fuels with varying volatile matter content, thus broadening its fuel applicability. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Fig. 1 A first-view schematic diagram of the overall structure of a biomass briquette fuel cooking stove suitable for plateau regions, provided as an embodiment of this utility model;

[0022] Fig. 2 A second-view schematic diagram of the overall structure of a biomass briquette fuel cooking stove suitable for plateau regions, provided as an embodiment of this utility model;

[0023] Fig. 3 This is a third-view schematic diagram of the overall structure of a biomass briquette fuel cooking stove suitable for plateau regions, provided as an embodiment of the present invention.

[0024] Icons: 1-Base; 2-Ash box; 3-Ash outlet; 4-Primary air duct; 5-Primary air vent; 6-Grate; 7-First-stage combustion chamber; 8-Furnace body; 9-Secondary air duct; 10-Secondary air vent; 11-Feeding duct; 12-Secondary combustion chamber; 13-Boiler; 14-Furnace ring; 15-Water inlet; 16-Chimney; 17-Water tank; 18-Grate support; 19-Blower; 20-Air supply duct; 21-Base support leg; 22-Water outlet. Detailed Implementation

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0027] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhang", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Some embodiments of the present application will be described in detail with reference to the drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0032] The biomass briquette fuel cooking stove suitable for plateau regions provided by the embodiment of the present application can improve combustion efficiency, save energy and reduce emissions, and is particularly suitable for plateau regions with low oxygen content in the air, and has important significance for environmental protection and energy reform.

[0033] In combination Figs. 1 to 3 The biomass briquette fuel cooking stove suitable for plateau regions comprises a stove body 8, a grate 6 and a air supply system. The stove body 8 comprises a primary combustion chamber 7 and a secondary combustion chamber 12 which are in communication with each other; the secondary combustion chamber 12 is located above the primary combustion chamber 7; the primary combustion chamber 7 is used for burning fixed carbon in the biomass briquette fuel, and the secondary combustion chamber 12 is used for burning volatile matter in the biomass briquette fuel. The grate 6 is arranged in the primary combustion chamber 7 and is used for placing the biomass briquette fuel. The installation height of the grate 6 in the primary combustion chamber 7 is adjustable. The air supply system is in communication with the primary combustion chamber 7 and the secondary combustion chamber 12 respectively, has high combustion efficiency, and is suitable for plateau regions with low oxygen content in the air.

[0034] Optionally, the cooking stove further comprises a base 1. The stove body 8 is installed on the base 1. The bottom of the base 1 is provided with a base support leg 21. The inside of the stove body 8 is provided with a hearth which is divided into the primary combustion chamber 7 and the secondary combustion chamber 12. The primary combustion chamber 7 is located below the secondary combustion chamber 12, the primary combustion chamber 7 is used for burning fixed carbon in the biomass briquette fuel, and the secondary combustion chamber 12 is used for burning volatile matter in the biomass briquette fuel. The grate 6 is arranged in the primary combustion chamber 7 and is used for placing the biomass briquette fuel. The lower part of the stove body 8 is provided with a pull-out type ash box 2 which is used for collecting ash generated by the combustion of the biomass briquette fuel. The top of the stove body 8 is provided with a stove ring 14, the stove ring 14 is used for placing a pot 13, and the air supply system supplies air to the primary combustion chamber 7 and the secondary combustion chamber 12 respectively to improve the combustion efficiency.

[0035] Optionally, a plurality of grate support pieces 18 are arranged in the primary combustion chamber 7 along the height direction, and the grate support pieces 18 are used for placing the grate 6; the grate 6 is installed on the grate support pieces 18 at different heights according to the content of volatile matter in the biomass briquette fuel.

[0036] Optionally, the inner wall of the primary combustion chamber 7 is provided with grate supports 18, and the grate 6 can be placed on the grate supports 18 at different heights to adjust the installation height of the grate 6. In this way, it can be suitable for different kinds of biomass briquette fuels, and ensure that fuels with different volatile contents can be fully burned. When the volatile content in the fuel is high, the grate 6 is placed on the grate supports 18 at the middle and lower part of the primary combustion chamber 7. When the volatile content in the fuel is low, the grate 6 is placed on the grate supports 18 at the upper part of the primary combustion chamber 7.

[0037] Each grate support 18 includes a plurality of limiting blocks distributed along the circumferential direction of the inner wall of the furnace body 8; the plurality of limiting blocks are used to place the grate 6. Optionally, the plurality of limiting blocks in each grate support 18 are uniformly distributed along the circumferential direction, so that the grate 6 is installed more stably and reliably. Moreover, the grate support 18 is subjected to more uniform stress, which is beneficial to prolong the service life.

[0038] Optionally, the connection between the primary combustion chamber 7 and the secondary combustion chamber 12 forms a neck. That is, the primary combustion chamber 7 and the secondary combustion chamber 12 are connected through a throat neck.

[0039] Optionally, the air supply system includes a blower 19, an air supply pipeline 20, a primary air pipeline 4 and a secondary air pipeline 9. One end of the air supply pipeline 20 is in communication with the blower 19, and the other end is connected with the primary air pipeline 4 and the secondary air pipeline 9, respectively. The primary air pipeline 4 surrounds the lower part of the primary combustion chamber 7. In this embodiment, the primary air pipeline 4 is arranged at the lower part of the primary combustion chamber 7, and the primary air pipeline 4 is an annular pipeline. The primary air pipeline 4 is provided with a primary air through hole 5 in communication with the primary combustion chamber 7; the secondary air pipeline 9 is used to communicate with the secondary combustion chamber 12.

[0040] Optionally, the primary air pipeline 4 is provided with a plurality of groups of primary air through holes 5 along the height direction, and the plurality of primary air through holes 5 in each group are uniformly distributed, and the diameter of the primary air through hole 5 close to the air supply pipeline 20 connection port is small, and the diameter of the primary air through hole 5 far from the air supply pipeline 20 connection port is large. In this way, the air provided for the primary combustion chamber 7 is more uniform.

[0041] Optionally, the secondary air pipeline 9 surrounds the neck around the connection between the primary combustion chamber 7 and the secondary combustion chamber 12. The secondary air pipeline 9 is a space formed between the channel and the inner wall of the secondary combustion chamber 12, and the lower part of the channel is provided with a plurality of rows of secondary air through holes 10 along the height direction, and each row of secondary air through holes 10 is 8 and is uniformly distributed. Of course, in some embodiments, the number of secondary air through holes 10 can be flexibly set.

[0042] Four air supply pipes 20 are connected to the blower 19. Two of the air supply pipes 20 are symmetrically arranged and connected to the two ends of the side wall of the furnace body 8 corresponding to the primary air pipe 4, and the other two air supply pipes 20 are symmetrically arranged and connected to the two ends of the side wall of the furnace body 8 corresponding to the secondary air pipe 9.

[0043] Optionally, the air supply system adopts forced ventilation, and the air volume of the blower 19 is adjustable, and the primary air and the secondary air are respectively sent into the first combustion chamber 7 and the second combustion chamber 12 through the blower 19.

[0044] When the blower 19 starts to work, air is respectively transported into the primary air pipe 4 and the secondary air pipe 9 through the air supply pipes 20, enters the first combustion chamber 7 through the primary air holes 5, makes the fixed carbon in the biomass briquette fuel fully burn, and makes the volatile gas in the fuel be released and enter the second combustion chamber 12. The combustible gas in the volatile gas is completely burned in the second combustion chamber 12 through the secondary air holes 10 in the secondary air pipe 9, and the combustion efficiency of the biomass briquette fuel is improved by setting the primary air and the secondary air.

[0045] Optionally, the furnace body 8 is provided with a dust outlet 3 at the same height as the ash falling box 2 on the side wall of the furnace body 8, and the ash falling box 2 full of ash can be taken out from the dust outlet 3, and after the ash is poured out, it is put back into the furnace body 8 through the dust outlet 3.

[0046] Optionally, the side wall of the furnace body 8 is provided with a heat preservation interlayer. In this embodiment, the heat preservation interlayer adopts a refractory clay interlayer, so as to prevent the temperature of the first combustion chamber 7 and the second combustion chamber 12 from being easily lost, and to realize the full combustion of the biomass briquette fuel.

[0047] Optionally, the furnace body 8 is further connected with a feeding pipe 11, a chimney 16 and a water tank 17. The chimney 16 and the feeding pipe 11 are respectively communicated with the second combustion chamber 12; the chimney 16 is at least partially arranged in the water tank 17, so that the water tank 17 and the chimney 16 exchange heat. The feeding pipe 11 penetrates the side wall of the furnace body 8 from the outside of the furnace body 8 to the inside of the furnace body 8 and is obliquely downward. The biomass briquette fuel is placed on the furnace grate 6 through the feeding pipe 11, and the chimney 16 is used for discharging the flue gas generated by combustion.

[0048] In this embodiment, the chimney 16 is a U-shaped pipe. The chimney 16 is sleeved with the water tank 17, the upper part of the water tank 17 is provided with a water inlet 15, the bottom is provided with a water outlet 22, the high-temperature flue gas generated after the briquette combustion is discharged to the atmosphere through the chimney 16, and when the high-temperature flue gas flows through the water tank 17, it exchanges heat with the water in the water tank 17, reduces the temperature of the flue gas of the cooking furnace grate 6, and the hot water can be used in production and life.

[0049] Optionally, the furnace body 8 is welded by iron plate. The length, width and height of the furnace body 8 are 400mm, 400mm and 530mm respectively. The water tank 17 is welded by stainless steel. The length, width and height of the water tank 17 are 300mm, 300mm and 300mm respectively. The rated power of the water tank 17 is 2KW. The fuel consumption per hour is 0.5kg to 1kg. The power of the air blower 19 is 20W. The power of the air blower 19 can be controlled by the regulator, so as to adjust the air volume in the primary air duct 4 and the secondary air duct 9. The length, width and height of the biomass briquette fuel are 30mm, 30mm and 70mm respectively. When the cooking stove is in normal operation, the cooking efficiency is 36%, the heating efficiency is 44%, and the comprehensive heat efficiency is 80%. The cooking stove has high economic benefits, energy saving and environmental protection.

[0050] The working principle of the biomass briquette fuel cooking stove suitable for plateau areas is as follows:

[0051] According to the biomass briquette fuel to be put in, the placement height of the grate 6 is selected. For the biomass briquette fuel with high volatile content such as wood, a lower position of the grate 6 is selected, that is, the grate 6 is placed on the grate support 18 at the lower part of the primary combustion chamber 7. For the biomass briquette fuel taking cow and sheep manure as raw material, a higher position of the grate 6 is selected, that is, the grate 6 is placed on the grate support 18 relatively close to the upper part of the primary combustion chamber 7.

[0052] Ignition in the hearth is achieved by using flammable materials such as ignition paper shell and wood. The flammable materials are directly put into the hearth from the top of the furnace body 8, and then the flammable materials are ignited. The air supply system is opened, and the air blower 19 continuously supplies air to the primary combustion chamber 7 and the secondary combustion chamber 12 through four air supply ducts 20. Then the biomass briquette fuel is added to the grate 6 through the feeding duct 11. The fixed carbon in the biomass briquette fuel is completely burned in the primary combustion chamber 7, and the volatile matter in the biomass briquette fuel is only decomposed in the primary combustion chamber 7 and completely burned in the secondary combustion chamber 12. The complete combustion of the biomass briquette fuel is achieved by setting the primary and secondary double-layer combustion chambers. The flame generated by combustion is used to heat the pot 13 placed on the furnace ring 14 of the furnace body 8. The flue gas generated by combustion is discharged into the atmosphere through the chimney 16. When the high-temperature flue gas passes through the chimney 16, it is fully heat-exchanged with the cold water in the water tank 17 to generate hot water. The hot water flows out through the water outlet 22, and cold water is supplemented through the water inlet 15 to continuously provide hot water for residents. The cooking stove not only can cook in the oxygen-poor plateau area, but also can provide hot water for daily life.

[0053] In summary, the biomass briquette fuel cooking stove suitable for plateau areas has the following beneficial effects, including:

[0054] (1) by setting the first combustion chamber 7 and the second combustion chamber 12 coupling structure, the first combustion chamber 7 is used for burning the fixed carbon in the biomass briquette fuel, the second combustion chamber 12 is used for burning the volatile in the biomass briquette fuel; can realize full combustion, save energy, reduce the emission of pollutants. The double combustion chamber coupling structure realizes the zoned combustion of biomass fuel, ensures the fixed carbon and volatile contained in the biomass briquette fuel is burned out.

[0055] (2) the liftable grate 6 can be suitable for different volatile content of biomass briquette fuel, the biomass briquette fuel in highland area such as crop straw briquette, forestry waste briquette, sheep manure briquette etc. is suitable. The cooking stove can be suitable for different types of biomass briquette fuel, when burning the biomass briquette fuel with higher volatile, the grate 6 is placed on the lower position of the grate support 18. When burning the biomass briquette fuel with lower volatile, the grate 6 is placed on the higher position of the grate support 18, which ensures that different types of biomass briquette fuel can be fully combusted, saves economic cost and reduces environmental pollution.

[0056] (3) the air supply system adopts forced ventilation and the air volume of the air blower 19 can be adjusted, through the primary air pipe and the secondary air pipe, the first combustion chamber 7 and the second combustion chamber 12 are respectively sent, which can provide enough oxygen for the combustion of biomass briquette fuel in the oxygen-thin highland area. The double combustion chamber structure and the multi-air supply system realize the efficient and clean combustion of biomass briquette fuel, which meets the cooking demand.

[0057] (4) in order to improve the thermal efficiency of the stove and provide hot water for farmers and herdsmen, the flue of the stove body 8 is arranged with a waste heat water tank 17, the high temperature flue gas passes through the inside of the water tank 17 through the U-shaped pipeline, which effectively reduces the temperature of the discharged flue gas, improves the comprehensive thermal efficiency of the stove and improves the energy utilization rate.

[0058] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; any modification, equivalent replacement, improvement, etc. should be included in the protection scope of the present application.

Claims

1. A biomass briquette cooking stove suitable for high altitude areas, characterized in that, The utility model relates to a biomass briquette combustion furnace, comprising: a furnace body; the furnace body comprises a primary combustion chamber and a secondary combustion chamber in communication with each other; the secondary combustion chamber is located above the primary combustion chamber; the primary combustion chamber is used for burning fixed carbon in the biomass briquette fuel, and the secondary combustion chamber is used for burning volatile matter in the biomass briquette fuel; a grate is arranged in the primary combustion chamber and used for placing the biomass briquette fuel; the installation height of the grate in the primary combustion chamber is adjustable; an air supply system is in communication with the primary combustion chamber and the secondary combustion chamber respectively.

2. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 1 wherein, The primary combustion chamber is provided with a plurality of grate supports in the height direction and used for placing the grate; the grate is installed on the grate supports at different heights according to the content of volatile matter in the biomass briquette fuel.

3. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 2 wherein, Each of the grate supports comprises a plurality of limiting blocks distributed in the circumferential direction of the inner wall of the furnace body; the limiting blocks are used for placing the grate.

4. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 1 wherein, The air supply system comprises a blower, an air supply pipeline, a primary air pipeline and a secondary air pipeline; one end of the air supply pipeline is in communication with the blower, and the other end is connected with the primary air pipeline and the secondary air pipeline respectively; the primary air pipeline surrounds the lower part of the primary combustion chamber, and the primary air pipeline is provided with a primary air through hole in communication with the primary combustion chamber; the secondary air pipeline is used for communicating with the secondary combustion chamber.

5. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 4 wherein, The primary air pipeline is provided with a plurality of groups of primary air through holes in the height direction; the primary air through holes in each group are uniformly distributed, and the diameter of the primary air through hole close to the air supply pipeline connection port is small, and the diameter of the primary air through hole far from the air supply pipeline connection port is large.

6. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 4 wherein, The connection between the primary combustion chamber and the secondary combustion chamber forms a necking.

7. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 6 wherein, The secondary air pipeline surrounds the necking.

8. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 4 wherein, The blower is connected with four air supply pipelines; two symmetrically arranged air supply pipelines are connected with the two ends of the corresponding side wall of the primary air pipeline respectively, and the other two symmetrically arranged air supply pipelines are connected with the two ends of the corresponding side wall of the secondary air pipeline respectively.

9. The biomass briquette cooking stove suitable for high altitude areas as claimed in claim 1 wherein, The side wall of the furnace body is provided with a thermal insulation interlayer.

10. The biomass briquette cooking stove suitable for high altitude areas as claimed in any one of claims 1 to 9 wherein, The utility model further comprises a feeding pipeline, a chimney and a water tank; the chimney and the feeding pipeline are in communication with the secondary combustion chamber respectively; the chimney is at least partially arranged in the water tank, so that the water tank and the chimney exchange heat.

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