WO2022227327A1

WO2022227327A1 - Micron household heating stove and use method

Info

Publication number: WO2022227327A1
Application number: PCT/CN2021/110693
Authority: WO
Inventors: 王训; 肖波; 许婷婷; 徐东辉
Original assignee: 华中科技大学
Priority date: 2021-04-30
Filing date: 2021-08-05
Publication date: 2022-11-03
Also published as: CN113280369B; CN113280369A

Abstract

The present invention relates to the technical field of biomass fuel combustion, and specifically relates to a micron household heating stove and a use method. The heating stove of the present invention comprises a frame body, and a feeding assembly, a combustion stove assembly, and a heating assembly that are provided in the frame body; the feeding assembly is used for conveying micron fuel through a feeding pipe to the combustion stove assembly for combustion; and the heating assembly conducts heat exchange with the combustion stove assembly to obtain heat for heating. Compared with biomass briquette fuel, the micron fuel of the present invention has advantages of combusting more thoroughly and faster, having a high combustion temperature and faster and more concentrated energy release speed, generating less waste, etc., and important resources are saved; by means of cyclone feeding in a hearth of a combustion stove, the combustion time of the fuel in the hearth is prolonged, and the combustion efficiency is improved; and a main heat exchange water tank surrounds the combustion stove, and heat radiation generated by a stove body of the combustion stove is also utilized, such that heat generated by combustion can be more fully utilized, and the energy utilization rate is increased.

Description

A kind of Xiao household heating stove and using method

【Technical field】

The invention belongs to the technical field of biomass fuel combustion, and in particular relates to a domestic heating stove and a use method.

【Background technique】

Biomass is considered to be a neglected energy source, which has the characteristics of ubiquity, abundance, and renewability. The efficient development and utilization of biomass energy will play a very positive role in solving energy and ecological environment problems. Biomass briquette fuel, which is widely used at present, has the characteristics of low cost and convenient processing, but compared with biomass micron fuel, its combustion is not sufficient, the combustion temperature is not high, and it is easy to generate a large amount of flue gas. The fuel particle size is smaller and the contact with the air is more sufficient, which greatly improves the combustion speed and efficiency, and thus can obtain a higher combustion temperature. Therefore, the application prospect of biomass micron fuel is broader. Professor Xiao Bo of Huazhong University of Science and Technology and his team called the "micron fuel" with a particle size of less than 250 microns efficiently produced by biomass.

At present, only the north provides central heating in China. However, due to the short low temperature period in the central and southern regions, the cost of central heating is high and the benefits are not good. However, with the gradual improvement of people's living standards, the demand for heating is increasing day by day. However, if all use air conditioners for heating and heating, it will greatly increase the electricity consumption of residents, causing the power supply pressure to increase sharply. At the same time, a large number of native biomass fuels such as straw and rice straw in rural areas provide natural geographical advantages and advantages for Xiao household heating stoves, and also reduce the demand and cost of waste biomass treatment.

CN105570874B discloses an integrated biomass self-powered cyclone gasification combustion furnace. The technical scheme forms a smoke window structure from the outer casing to the combustion inner cylinder and the outer cylinder, so that the hot air outside the gasification room can generate a strong upward pulling force to increase the strength. Oxygen; the guide vane is tangential to the right along the mouth of the gasification chamber, generating a strong cyclone in the counterclockwise direction along the direction of the ground bias, fully mixing the fuel gas, and making the biomass burn fully. However, this technical solution cannot fully utilize biomass combustion energy, and there is still room for improvement.

Therefore, the prior art still lacks a biomass combustion furnace with high combustion efficiency and good application prospect.

[Content of the invention]

In response to the improvement requirements of the prior art, the present invention provides a Xiao household heating furnace, the purpose of which is to design the furnace into three layers. After the fuel after ignition enters the outer layer of the furnace through the lower feed port, it spirally rises at a high speed and reaches the After the top, it is pushed into the middle layer of the furnace due to the pressure and spirally descends at a high speed. After reaching the bottom, it spirals up and is ejected from the furnace through the fire outlet. Under the condition of the same furnace volume, this method greatly increases the time of the fuel in the furnace, provides sufficient time for the gasification and complete combustion of the fuel, and greatly improves the combustion efficiency. Heating efficiency of biomass.

In order to achieve the above purpose, according to one aspect of the present invention, there is provided a domestic heating furnace, comprising a frame body, a feeding component, a combustion furnace component and a heating component arranged inside the frame body, and the feeding component is used for passing through the furnace. The feed pipe transports the fuel to the burner assembly for combustion, the heating assembly is used for heat exchange with the burner assembly to obtain heat for heating, and the burner assembly includes a burner and a support for supporting the burner , the support is fixedly connected with the frame;

The inside of the combustion furnace is provided with a first annular partition plate, a second annular partition plate and a horizontal partition plate, and the horizontal partition plate is vertically connected with the furnace chamber of the combustion furnace and divides the combustion furnace into an upper combustion chamber and a lower combustion chamber. A combustion chamber, a hole is arranged in the middle of the horizontal baffle to form a fire outlet, the upper combustion chamber and the lower combustion chamber are communicated through the fire outlet, and the second annular baffle is fixedly connected to the horizontal baffle and is connected to the A gas channel is formed at the bottom of the combustion furnace, the first annular partition is located between the furnace chamber and the second annular partition, and the first annular partition is fixedly connected to the bottom of the combustion furnace and is connected to the furnace. The horizontal partition plate forms a gas channel, the furnace is provided with a combustion furnace inlet, and the feed pipe communicates with the internal combustion chamber of the combustion furnace through the combustion furnace inlet of the combustion furnace, and the combustion furnace inlet is provided with an igniter.

Preferably, a spiral groove is provided on the furnace.

Preferably, the surfaces of the second annular partition plate and the first annular partition plate are provided with spiral grooves.

Preferably, the axis of the feed pipe is tangent to the circumference of the furnace.

After the fuel is ignited, it enters the combustion furnace and firstly rises spirally in the outer space formed by the furnace hearth and the first annular partition. The axis of the feed pipe is tangent to the circumference of the furnace hearth, which helps the spiral rise of the fuel. At the same time, the spiral groove can help the spiral upward of the fuel.

Preferably, the igniter is a thermocouple igniter.

Preferably, the feeding component is provided with a hopper, a quantitative feeding mechanism, a suction hood, a blower and a feeding pipe in sequence along the direction of movement of the fuel, the hopper is provided with a stirring mechanism, and the feeding port of the hopper is provided with on the frame wall.

Preferably, the dosing mechanism is provided with a governor, which can control the feeding speed.

Preferably, the heating assembly includes a main water exchanger, a secondary water exchanger and a heat exchange cover, the main water exchange wraps the combustion furnace, and the heat exchange cover is located above the combustion furnace and is connected to the upper combustion chamber Connected through pipes, a secondary water heater is arranged inside the heat exchange cover, and the flue gas after combustion enters the heat exchange cover for heat exchange with the secondary water heater. The secondary water heater is provided with a heat exchanger water inlet pipe and a heat exchanger water outlet pipe, and the heat exchange cover is provided with a flue gas outlet pipe.

Preferably, the flue gas outlet pipe is connected to a dust removal system, and the dust removal system is provided with a bag filter and an induced draft fan matched with the bag filter.

According to another aspect of the present invention, there is provided a method for using the aforementioned Xiao household heating stove, comprising the following steps:

(1) fill the micron fuel in the hopper, open the stirring mechanism and use its rotational motion to destroy the accumulation phenomenon formed by the micron fuel;

(2) Turn on the igniter to heat the igniter to the preset working temperature, and preheat the end of the feeding pipe and the area near the feeding port of the furnace;

(3) After the thermocouple is fully heated, turn on the quantitative feeding mechanism for feeding, and turn on the blower. The fuel falls into the lower suction hood, and the negative pressure generated by the blower and the weight of the fuel make it enter the feed pipe. and in the process mix well with air, pass through and be ignited by the thermocouple igniter;

(4) After the fuel is ignited, it enters the combustion furnace. First, it spirally rises in the outer space formed by the furnace hearth and the first annular baffle. After reaching the top, it is pushed to the first annular baffle and the second annular baffle due to pressure. The middle space spirally descends, and after reaching the bottom, it is pushed into the inner space formed by the second annular partition and spirals upwards, and is ejected from the furnace through the fire outlet;

(5) The heat generated by the full combustion of the fuel is absorbed by the main water heater and the secondary water heater, and the heat of the main water heater and the secondary water heater is used to achieve heating, and the dust generated after combustion is discharged into the dust removal system through the flue gas outlet pipe. collected centrally.

The beneficial effects of the present invention are:

(1) Compared with biomass briquette fuel, the present invention has the advantages of more thorough and faster combustion, higher combustion temperature, faster and more concentrated energy release, less waste (such as slag, etc.) important resources, and improve the utilization efficiency of biomass resources that were originally waste, in line with national environmental protection policies, cyclone feeding in the furnace hearth, increase the burning time of fuel in the hearth, improve combustion efficiency and heat utilization, Since the combustion is more thorough, the amount of ash produced is greatly reduced. The main and secondary hot water exchange tanks are installed. The main hot water exchange tank surrounds the combustion furnace, and the heat radiation generated by the combustion furnace body is also utilized, so that the heat generated by combustion can be used. More fully utilized, improved energy utilization.

(2) The present invention designs the furnace into three layers, and the axis of the feed pipe is tangent to the circumference of the furnace, so that the fuel spirally rises, spirals down and spirals up in the furnace successively. enough time for fuel gasification and complete combustion. Since the combustion is very thorough, the dust content in the flue gas is greatly reduced, which can not only utilize the fuel efficiently, but also reduce the soot emission and protect the environment.

(3) The stirring mechanism of the present invention can destroy the accumulation structure of the micron fuel in the feeding process and ensure the continuity of feeding. In addition, a quantitative feeding mechanism, that is, a quantitative feeding auger, is set above the feeding port. The quantitative feeding mechanism (4) is provided with a governor to realize the quantitative feeding function and change the real-time feeding amount to ensure a good Burning effect.

(4) The present invention is equipped with a blower after the feeding port, and the fuel is blown into the furnace at a higher speed, so that on the one hand, the negative air pressure generated by the high-speed airflow on the side of the fan can be used to promote the feeding of the silo, and on the other hand, the The high-speed blowing of the fuel into the furnace can fully mix the fuel and the air to ensure complete combustion, and also prevent the fuel and residual ash from accumulating in the furnace, affecting the combustion process and burning out the furnace body.

(5) The combustion furnace of the present invention adopts the electric heating or gas heating and ignition mode of the thermocouple, which avoids the operation that needs to be ignited by an open flame every time it is used, and is convenient and quick. The connection between the main heat exchanger and the fire outlet of the furnace is designed to be closed, which makes the flame more concentrated when spraying, reduces heat loss, and prevents ash from escaping at the connection between the two. The inside gradually accumulates, causing blockage of the device, difficulty in cleaning, sintering with the furnace body, and even a risk of fire. The secondary hot water exchange tank can block the flame, prevent the open flame from being exposed, and improve the safety factor. After the smoke and dust generated by the combustion of Xiao fuel are ejected with the flame, it is sucked into the bag filter by the induced draft fan of the dust removal system through the dust outlet on the back side of the secondary hot water tank, ensuring that the heating furnace is suitable for indoor space, which is more environmentally friendly and convenient. clean.

【Description of drawings】

Fig. 1 is the structural representation of Xiao household heating stove of the present invention;

Fig. 2 is a partial enlarged view of the combustion furnace;

Fig. 3 is a plan view of the combustion furnace.

In all drawings, the same reference numerals are used to represent the same elements or structures, wherein: heat exchanger outlet pipe 1, hopper 2, stirring mechanism 3, dosing mechanism 4, suction hood 5, blower 6, Feed pipe 7, igniter 8, support 9, combustion furnace 10, secondary water heater 11, frame 12, heat exchange cover 13, heat exchanger inlet pipe 14, secondary water heater 15, flue gas outlet pipe 16, combustion The furnace inlet 17 , the second annular partition 18 , the first annular partition 19 , the furnace chamber 20 , the spiral groove 21 , the horizontal partition 22 , the upper combustion chamber 23 , the lower combustion chamber 24 , and the fire outlet 25 .

【Detailed ways】

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, 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.

Example

A kind of domestic heating furnace, as shown in Figures 1-3, includes a frame body 12, a feeding assembly, a combustion furnace assembly and a heating assembly arranged inside the frame body 12, and the feeding assembly is used to pass the feeding pipe 7 The fuel is transported to the combustion furnace assembly for combustion, and the heating assembly is used to exchange heat with the combustion furnace assembly to obtain heat for heating. The combustion furnace assembly includes a combustion furnace 10 and a support 9 supporting the combustion furnace 10. , the support 9 is fixedly connected with the frame body 12;

The combustion furnace 10 is provided with a first annular partition plate 19, a second annular partition plate 18 and a horizontal partition plate 22. The horizontal partition plate 22 is vertically connected with the furnace chamber 20 of the combustion furnace 10 and connects the combustion furnace. 10 is divided into an upper combustion chamber 23 and a lower combustion chamber 24, a hole is provided in the middle of the horizontal partition 22 to form a fire outlet 25, the upper combustion chamber 23 and the lower combustion chamber 24 are communicated through the fire outlet 25, and the first Two annular partitions 18 are fixedly connected to the horizontal partitions 22 and form gas passages with the bottom of the combustion furnace 10 . The first annular partition 19 is located between the furnace chamber 20 and the second annular partition 18 During the time, the first annular partition 19 is fixedly connected with the bottom of the combustion furnace 10 and forms a gas channel with the horizontal partition 22. The furnace chamber 20 is provided with a combustion furnace inlet 17, and the feed pipe 7 passes through The burner inlet 17 of the burner 10 communicates with the internal combustion chamber of the burner 10 , and the burner inlet 17 is provided with the igniter 8 .

The feeding assembly is sequentially provided with a hopper 2, a quantitative feeding mechanism 4, a suction hood 5, a blower 6 and a feeding pipe 7 along the direction of fuel movement, and a stirring mechanism (3) is arranged inside the hopper 2. The The feeding port of the hopper 2 is arranged on the wall of the frame body.

The heating assembly includes a main water heater 11, a secondary water heater 15, and a heat exchange cover 13, the main water exchange heater 11 wraps the combustion furnace 10, and the heat exchange cover 13 is located above the combustion furnace 10 and is connected to the The above combustion chambers 23 are communicated through pipes, the heat exchange cover 13 is provided with a secondary water heater 11, and the flue gas after combustion enters the heat exchange cover to exchange heat with the secondary water heater 15. The main water heater 11 is connected by a water pipe, the secondary water heater 11 is provided with a heat exchanger water inlet pipe 14 and a heat exchanger water outlet pipe 1 , and the heat exchange cover 13 is provided with a flue gas outlet pipe 16 .

As a preferred embodiment, the furnace chamber 20 is provided with a spiral groove 21 .

As a preferred embodiment, the surfaces of the second annular partition plate 18 and the first annular partition plate 19 are provided with spiral grooves 21 .

As a preferred embodiment, the axis of the feed pipe 7 is tangent to the circumference of the furnace 20 .

As a preferred embodiment, the igniter 8 is a thermocouple igniter.

As a preferred embodiment, the dosing mechanism 4 is provided with a governor, which can control the feeding speed.

As a preferred embodiment, the flue gas outlet pipe 16 is connected to a dust removal system, and the dust removal system is provided with a bag filter and an induced draft fan matched with the bag filter.

The use method of Xiao household heating stove using the present implementation includes the following steps:

Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, etc., All should be included within the protection scope of the present invention.

Claims

A domestic heating stove, characterized in that it comprises a frame body (12), a feeding assembly, a combustion furnace assembly and a heating assembly arranged inside the frame body (12), and the feeding assembly is used for passing through a feeding pipe (12). 7) The fuel is transported to the combustion furnace assembly for combustion, the heating assembly is used to exchange heat with the combustion furnace assembly to obtain heat for heating, and the combustion furnace assembly includes a combustion furnace (10), a supporting combustion furnace ( 10) the support (9), the support (9) is fixedly connected with the frame body (12);

The combustion furnace (10) is provided with a first annular partition (19), a second annular partition (18) and a horizontal partition (22), and the horizontal partition (22) is connected to the combustion furnace (10). ) of the furnace (20) is vertically connected and the combustion furnace (10) is divided into an upper combustion chamber (23) and a lower combustion chamber (24), and holes are provided in the middle of the horizontal partition plate (22) to form a fire outlet (25). ), the upper combustion chamber (23) and the lower combustion chamber (24) are communicated through a fire outlet (25), and the second annular partition (18) is fixedly connected to the horizontal partition (22) and is A gas channel is formed at the bottom of the combustion furnace (10), the first annular partition plate (19) is located between the furnace chamber (20) and the second annular partition plate (18), and the first annular partition plate (19) is located between the furnace chamber (20) and the second annular partition plate (18). The plate (19) is fixedly connected with the bottom of the combustion furnace (10) and forms a gas channel with the horizontal partition plate (22). The furnace chamber (20) is provided with a combustion furnace inlet (17), and the feed pipe (7) Communication with the internal combustion chamber of the combustion furnace (10) through a combustion furnace inlet (17) of the combustion furnace (10), which is provided with an igniter (8).
The Xiao household heating furnace according to claim 1, wherein a spiral groove (21) is provided on the furnace chamber (20).
The Xiao household heating stove according to claim 2, wherein the surfaces of the second annular partition plate (18) and the first annular partition plate (19) are provided with spiral grooves (21).
The Xiao household heating furnace according to claim 1, 2 or 3, characterized in that, the axis of the feed pipe (7) is tangent to the circumference of the furnace (20).
The Xiao household heating stove according to claim 1 or 2, wherein the igniter (8) is a thermocouple igniter.
The household heating furnace according to claim 1, characterized in that, the feeding component is sequentially provided with a hopper (2), a quantitative feeding mechanism (4), a suction hood (5), and a blower along the direction of fuel movement. (6) and a feeding pipe (7), a stirring mechanism (3) is arranged inside the hopper (2), and the feeding port of the hopper (2) is arranged on the wall of the frame body.
The Xiao household heating stove according to claim 6, characterized in that, the quantitative feeding mechanism (4) is provided with a governor, which can control the feeding speed.
The Xiao household heating furnace according to claim 1, wherein the heating assembly comprises a main water exchange heater (11), a secondary water exchange heater (15) and a heat exchange cover (13), and the main water exchange heater (11) The combustion furnace (10) is wrapped, the heat exchange cover (13) is located above the combustion furnace (10) and communicated with the upper combustion chamber (23) through a pipeline, and the heat exchange cover (13) is inside A secondary water exchange heater (11) is provided, and the flue gas after combustion enters the heat exchange cover to exchange heat with the secondary water exchange heater (15), and the secondary water exchange heater (11) is connected with the main water exchange heater (11) through a water pipe, The secondary water heater (11) is provided with a heat exchanger water inlet pipe (14) and a heat exchanger water outlet pipe (1), and the heat exchange cover (13) is provided with a flue gas outlet pipe (16).
The Xiao household heating furnace according to claim 8, wherein the flue gas outlet pipe (16) is connected to a dust removal system, and the dust removal system is provided with a bag filter and an induced draft fan matched with the bag filter.
The using method of Xiao household heating stove according to any one of claims 1-9, is characterized in that, comprises the following steps:

(1) fill the micron fuel in the hopper, open the stirring mechanism and use its rotational motion to destroy the accumulation phenomenon formed by the micron fuel;

(2) Turn on the igniter to heat the igniter to the preset working temperature, and preheat the end of the feeding pipe and the area near the feeding port of the furnace;

(3) After the thermocouple is fully heated, turn on the quantitative feeding mechanism for feeding, and turn on the blower. The fuel falls into the lower suction hood, and the negative pressure generated by the blower and the weight of the fuel make it enter the feed pipe. and in the process mix well with air, pass through and be ignited by the thermocouple igniter;

(4) After the fuel is ignited, it enters the combustion furnace. First, it spirally rises in the outer space formed by the furnace hearth and the first annular baffle. After reaching the top, it is pushed to the first annular baffle and the second annular baffle due to pressure. The middle space spirally descends, and after reaching the bottom, it is pushed into the inner space formed by the second annular partition and spirals upwards, and is ejected from the furnace through the fire outlet;

(5) The heat generated by the full combustion of the fuel is absorbed by the main water heater and the secondary water heater, and the heat of the main water heater and the secondary water heater is used to achieve heating, and the dust generated after combustion is discharged into the dust removal system through the flue gas outlet pipe. collected centrally.