CN113280369A

CN113280369A - Household trumpet creeper heating furnace and using method thereof

Info

Publication number: CN113280369A
Application number: CN202110481545.9A
Authority: CN
Inventors: 王训; 肖波; 徐东辉; 许婷婷; 贾永胜
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-08-20
Anticipated expiration: 2041-04-30
Also published as: CN113280369B; WO2022227327A1

Abstract

The invention belongs to the technical field of biomass fuel combustion, and particularly relates to a trumpet creeper household heating furnace and a using method thereof. The heating furnace comprises a frame body, and a feeding assembly, a combustion furnace assembly and a heating assembly which are arranged in the frame body, wherein the feeding assembly is used for conveying a trumpet creeper fuel to the combustion furnace assembly through a feeding pipe for combustion, and the heating assembly and the combustion furnace assembly are subjected to heat exchange to obtain heat for heating. Compared with biomass briquette fuel, the trumpet creeper fuel has the advantages of more thorough and quicker combustion, high combustion temperature, quicker and more concentrated energy release speed, less generated waste and the like, saves important resources, increases the combustion time of the fuel in a hearth by cyclone feeding in the hearth of the combustion furnace, improves the combustion efficiency, surrounds the combustion furnace by the main heat exchange water tank, utilizes the heat radiation generated by the furnace body of the combustion furnace, ensures that the heat generated by the combustion can be more fully utilized, and improves the energy utilization rate.

Description

Household trumpet creeper heating furnace and using method thereof

Technical Field

The invention belongs to the technical field of biomass fuel combustion, and particularly relates to a trumpet creeper household heating furnace and a using method thereof.

Background

Biomass is considered to be an overlooked energy source and has the characteristics of ubiquity, richness, renewability and the like. The efficient development and utilization of biomass energy play a very positive role in solving the problems of energy and ecological environment. Although the biomass briquette fuel with more applications has the characteristics of low cost, convenient processing and the like, compared with the biomass micron fuel, the biomass briquette fuel has the defects of insufficient combustion, low combustion temperature, easy generation of a large amount of smoke and the like, and the biomass micron fuel has smaller particle size and is more fully contacted with air, so that the combustion speed and the efficiency are greatly improved, and further, higher combustion temperature can be obtained, and the application prospect of the biomass micron fuel is wider. The Xiaobo professor of Huazhong university of science and technology and the team thereof refer to the micron fuel with the particle size of less than 250 microns, which is efficiently produced by biomass, as the trumpet creeper fuel, and the trumpet creeper fuel can realize the combustion at the high temperature of more than 1400 ℃, so that the Chinese trumpet creeper fuel has wide market prospect.

At present, only the north basically provides central heating in China, and the central heating cost is high and the benefit is poor in the middle and the south of the middle due to the fact that the low-temperature period is short, but the heating demand is gradually increased along with the gradual improvement of the living standard of people. However, if the air conditioner is adopted for heating, the electricity consumption of residents can be greatly increased, so that the power supply pressure is increased suddenly, and meanwhile, the power supply facilities in rural areas are not perfect enough, so that the electricity utilization risk is easily increased greatly. Meanwhile, a large amount of raw biomass fuels such as straws and rice straws in rural areas provide natural utilization and advantages for the campsis household heating furnace, and the treatment requirement and cost of waste biomass are reduced.

CN105570874B discloses an integrated biomass self-operated cyclone gasification combustion furnace, the technical scheme is that a smoke window structure is formed from a shell to an inner cylinder and an outer cylinder of a combustion chamber, so that hot air outside the gasification chamber generates strong pull-up force to perform strong oxygenation; the guide vanes are tangential to the right along the opening of the gasification chamber to generate strong cyclone along the counterclockwise direction of the clockwise bias direction, so that the fuel gas is fully mixed, and the biomass is fully combusted. However, the technical scheme cannot fully utilize the biomass combustion energy, and the improvement space exists.

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

Disclosure of Invention

Aiming at the improvement requirement of the prior art, the invention provides a household heating stove for campsis, which aims to design a hearth into three layers, wherein ignited fuel enters an outer layer of the hearth through a lower feeding hole, then spirally rises at a high speed, is pushed to a hearth in a middle layer due to pressure after reaching the top, spirally falls at a high speed, and then spirally rises after reaching the bottom and is sprayed out of the hearth through a fire outlet. Under the same furnace volume condition, the mode greatly increases the time of the fuel in the furnace, provides sufficient time for fuel gasification and complete combustion, greatly improves the combustion efficiency, and simultaneously has a plurality of heat exchangers, thereby improving the heating efficiency of the biomass.

In order to achieve the above purpose, according to one aspect of the present invention, there is provided a household trumpet creeper heating furnace, including a frame, a feeding assembly, a combustion furnace assembly and a heating assembly, the feeding assembly, the combustion furnace assembly and the heating assembly are arranged inside the frame, the feeding assembly is used for feeding trumpet creeper fuel to the combustion furnace assembly through a feeding pipe for combustion, the heating assembly is used for exchanging heat with the combustion furnace assembly to obtain heat for heating, the combustion furnace assembly includes a combustion furnace and a support for supporting the combustion furnace, and the support is fixedly connected with the frame;

a first annular clapboard, a second annular clapboard and a horizontal clapboard are arranged in the combustion furnace, the horizontal clapboard is vertically connected with a hearth of the combustion furnace and divides the combustion furnace into an upper combustion chamber and a lower combustion chamber, a hole is arranged in the middle of the horizontal clapboard to form a fire outlet, the upper combustion chamber is communicated with the lower combustion chamber through the fire outlet, the second annular clapboard is fixedly connected with the horizontal clapboard and forms a gas channel with the bottom of the combustion furnace, the first annular clapboard is positioned between the hearth and the second annular clapboard, the first annular clapboard is fixedly connected with the bottom of the combustion furnace and forms a gas channel with the horizontal clapboard, the hearth is provided with a combustion furnace inlet, the feed pipe is communicated with an 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, the hearth is provided with a spiral groove.

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

Preferably, the feed tube axis is tangential to the furnace circumference.

The creeper fuel enters the combustion furnace after being ignited, firstly spirally rises in an outer layer space formed by the hearth and the first annular partition plate, and the axis of the feeding pipe is tangential to the circumference of the hearth, so that the spiral rising of the creeper fuel is facilitated. Meanwhile, the spiral groove can contribute to spiral rising of the trumpet creeper fuel.

Preferably, the igniter is a thermocouple igniter.

Preferably, the feeding assembly is provided with a hopper, a quantitative feeding mechanism, a suction cover, a blower and a feeding pipe in sequence along the movement direction of the trumpet creeper fuel, an agitating mechanism is arranged inside the hopper, and a feeding port of the hopper is arranged on the wall of the frame.

Preferably, the dosing mechanism is provided with a speed regulator, which is capable of controlling the feeding speed.

Preferably, the heating assembly comprises a main heat exchanger, a secondary heat exchanger and a heat exchange cover, the main heat exchanger wraps the combustion furnace, the heat exchange cover is located above the combustion furnace and communicated with the upper combustion chamber through a pipeline, the secondary heat exchanger is arranged in the heat exchange cover, combusted flue gas enters the heat exchange cover to exchange heat with the secondary heat exchanger, the secondary heat exchanger is connected with the main heat exchanger through a water pipe, the secondary heat exchanger 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 with a dust removal system, and the dust removal system is provided with a bag-type dust remover and an induced draft fan matched with the bag-type dust remover.

According to another aspect of the present invention, there is provided a method for using a trumpet home heating stove as described above, comprising the steps of:

(1) filling the trumpet creeper fuel into a hopper, and starting a stirring mechanism to destroy the accumulation phenomenon formed by the micron fuel by utilizing the rotary motion of the stirring mechanism;

(2) starting an igniter to heat the igniter to a preset working temperature, and preheating the tail end of a feeding pipe and the area near a feeding hole of a hearth;

(3) after the thermocouple is completely heated, starting the quantitative feeding mechanism to feed, starting the blower, enabling the trumpet creeper fuel to fall into the lower material suction cover, enabling the trumpet creepers to enter the feeding pipe by negative pressure generated by the blower and the dead weight of the trumpet creeper fuel and be fully mixed with air in the process, and enabling the trumpet creeper to pass through the thermocouple igniter and be ignited by the thermocouple igniter;

(4) the campsis fuel is ignited and then enters the combustion furnace, firstly spirally rises in an outer layer space formed by the hearth and the first annular partition plate, spirally descends in a middle layer space formed by the first annular partition plate and the second annular partition plate due to pressure after reaching the top, spirally rises in an inner layer space formed by the second annular partition plate due to pressure after reaching the bottom, and is sprayed out of the hearth through the fire outlet;

(5) the heat that the fuel fully burns of campsis produces is absorbed by main heat exchanger hydrophone and inferior heat exchanger hydrophone, utilizes the heat of main heat exchanger hydrophone and inferior heat exchanger hydrophone in order realizing the heating, and the dust that produces after the burning discharges to dust pelletizing system through the flue gas outlet pipe and goes to be concentrated and collect.

The invention has the following beneficial effects:

(1) compared with biomass briquette fuel, the trumpet creeper fuel has the advantages of more thorough and quicker combustion, high combustion temperature, quicker and more concentrated energy release speed, less generated waste (such as slag and the like), and the like, saves important resources, improves the utilization efficiency of biomass resources which are originally waste, accords with the national environmental protection policy, is fed by cyclone in a combustion furnace hearth, increases the combustion time of fuel in the hearth, improves the combustion efficiency and the heat utilization rate, greatly reduces the generation amount of ash because the combustion is more thorough, is provided with a primary heat exchange water tank and a secondary heat exchange water tank, surrounds the combustion furnace by the primary heat exchange water tank, utilizes the heat radiation generated by a furnace body of the combustion furnace, ensures that the heat generated by the combustion can be more fully utilized, and improves the energy utilization rate.

(2) The invention designs the hearth into three layers, and the axial line of the feeding pipe is tangent to the circumference of the hearth, so that the fuel sequentially rises spirally, falls spirally and rises spirally in the hearth, the time of the fuel in the hearth is greatly increased under the condition of the same hearth volume, and sufficient time is provided for the gasification and complete combustion of the fuel. Because the combustion is very thorough, the dust content in the flue gas is greatly reduced, the fuel can be efficiently utilized, the smoke emission can be reduced, and the environment is protected.

(3) The stirring mechanisms can destroy the stacking structure of the micron fuel in the feeding process and ensure the continuity of the feeding, and are respectively arranged in the middle of the hopper to ensure that the stirring mechanisms can contact most of the fuel. In addition, a quantitative feeding mechanism, namely a quantitative feeding auger, is arranged above the feeding hole, and a speed regulator is arranged on the quantitative feeding mechanism (4) so as to realize the quantitative feeding function and change the real-time feeding amount to ensure good combustion effect.

(4) The air blower is additionally arranged behind the feeding hole, and the trumpet creeper fuel is blown into the hearth at a higher speed, so that on one hand, the air negative pressure generated by high-speed airflow at the side of the air blower can be utilized to promote feeding of the feeding bin, on the other hand, the trumpet creeper fuel is blown into the hearth at a high speed, so that the trumpet creeper fuel and the air can be fully mixed to ensure complete combustion, and the trumpet creeper fuel and residual ash after combustion are prevented from being accumulated in the hearth to influence the combustion process and burn out the furnace body.

(5) The combustion furnace adopts a mode of heating by electrifying a thermocouple or heating and igniting by gas, avoids the operation of igniting by open fire in each use, and is convenient and quick. Main heat exchanger and furnace go out the fire door junction design for the form of binding off, concentrate more when making flame blowout, reduce calorific loss to prevent the ash content at both junctions loss, stopped along with the extension of live time, the dust is piled up gradually inside the device, causes the device to block up, clearance difficulty, with the risk that the furnace body sintering triggered the conflagration even. The secondary heat exchange water tank can block flame, prevent open fire from exposing, and improve safety factor. After smoke and dust that the campsis fuel burning produced is associated with flame blowout, through the dust outlet hole of secondary heat transfer water tank rear side, by the draught fan of dust pelletizing system suction sack cleaner in, guarantee that the heating stove is applicable to the interior space, environmental protection more, and be convenient for clean.

Drawings

Fig. 1 is a schematic structural view of a household heating stove for campsis of the invention;

FIG. 2 is an enlarged view of a portion of the burner;

FIG. 3 is a top view of the burner.

The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: the device comprises a heat exchanger water outlet pipe 1, a hopper 2, a stirring mechanism 3, a quantitative feeding mechanism 4, a material suction cover 5, a blower 6, a feeding pipe 7, an igniter 8, a support 9, a combustion furnace 10, a secondary heat exchanger water heater 11, a frame 12, a heat exchange cover 13, a heat exchanger water inlet pipe 14, a secondary heat exchanger water heater 15, a flue gas outlet pipe 16, a combustion furnace inlet 17, a second annular partition plate 18, a first annular partition plate 19, a hearth 20, a spiral groove 21, a horizontal partition plate 22, an upper combustion chamber 23, a lower combustion chamber 24 and a fire outlet 25.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

A household trumpet creeper heating furnace is shown in figures 1-3 and comprises a frame body 12, and a feeding assembly, a combustion furnace assembly and a heating assembly which are arranged inside the frame body 12, wherein the feeding assembly is used for conveying trumpet creeper fuel to the combustion furnace assembly through a feeding pipe 7 for combustion, the heating assembly is used for exchanging heat with the combustion furnace assembly to obtain heat for heating, the combustion furnace assembly comprises a combustion furnace 10 and a support 9 for supporting the combustion furnace 10, and the support 9 is fixedly connected with the frame body 12;

a first annular partition plate 19, a second annular partition plate 18 and a horizontal partition plate 22 are arranged inside the combustion furnace 10, the horizontal partition plate 22 is vertically connected with a hearth 20 of the combustion furnace 10 and divides the combustion furnace 10 into an upper combustion chamber 23 and a lower combustion chamber 24, a hole is arranged 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 the fire outlet 25, the second annular partition plate 18 is fixedly connected with the horizontal partition plate 22 and forms a gas passage with the bottom of the combustion furnace 10, the first annular partition plate 19 is arranged between the hearth 20 and the second annular partition plate 18, the first annular partition plate 19 is fixedly connected with the bottom of the combustion furnace 10 and forms a gas passage with the horizontal partition plate 22, the hearth 20 is provided with a combustion furnace inlet 17, the feeding pipe 7 is communicated with the internal combustion chamber of the combustion furnace 10 through the combustion furnace inlet 17 of the combustion furnace 10, the burner inlet 17 is provided with an igniter 8.

The feed assembly has set gradually hopper 2, dosing mechanism 4, inhales material cover 5, air-blower 6 and inlet pipe 7 along the campsis fuel direction of motion, 2 inside rabbling mechanisms (3) that are provided with of hopper, the feed inlet of hopper 2 sets up on the frame wall.

The heating assembly comprises a main heat exchanger 11, a secondary heat exchanger 15 and a heat exchange cover 13, the main heat exchanger 11 wraps the combustion furnace 10, the heat exchange cover 13 is located above the combustion furnace 10 and is communicated with the upper combustion chamber 23 through a pipeline, the secondary heat exchanger 11 is arranged inside the heat exchange cover 13, combusted smoke enters the heat exchange cover to exchange heat with the secondary heat exchanger 15, the secondary heat exchanger 11 is connected with the main heat exchanger 11 through a water pipe, the secondary heat exchanger 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 smoke outlet pipe 16.

In a preferred embodiment, the hearth 20 is provided with a spiral groove 21.

As a preferred embodiment, the surfaces of said second annular partition 18 and of said first annular partition 19 are each provided with a helical groove 21.

In a preferred embodiment, the axis of the feeding pipe 7 is tangential to the circumference of the hearth 20.

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

As a preferred embodiment, the dosing mechanism 4 is provided with a speed regulator, which is able to control the feeding speed.

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

The application method of the household trumpet creeper heating furnace comprises the following steps:

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A household trumpet creeper heating furnace is characterized by comprising a frame body (12), and a feeding assembly, a combustion furnace assembly and a heating assembly which are arranged inside the frame body (12), wherein the feeding assembly is used for conveying trumpet creeper fuel to the combustion furnace assembly through a feeding pipe (7) for combustion, the heating assembly is used for exchanging heat with the combustion furnace assembly to obtain heat for heating, the combustion furnace assembly comprises a combustion furnace (10) and a support (9) for supporting the combustion furnace (10), and the support (9) is fixedly connected with the frame body (12);

a first annular partition plate (19), a second annular partition plate (18) and a horizontal partition plate (22) are arranged in the combustion furnace (10), the horizontal partition plate (22) is vertically connected with a hearth (20) of the combustion furnace (10) and divides the combustion furnace (10) into an upper combustion chamber (23) and a lower combustion chamber (24), a hole is formed in the middle of the horizontal partition plate (22) to form a fire outlet (25), the upper combustion chamber (23) is communicated with the lower combustion chamber (24) through the fire outlet (25), the second annular partition plate (18) is fixedly connected with the horizontal partition plate (22) and forms a gas channel with the bottom of the combustion furnace (10), the first annular partition plate (19) is positioned between the hearth (20) and the second annular partition plate (18), the first annular partition 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 hearth (20) is provided with a combustion furnace inlet (17), the feeding pipe (7) is communicated with an internal combustion chamber of the combustion furnace (10) through the combustion furnace inlet (17) of the combustion furnace (10), and the combustion furnace inlet (17) is provided with an igniter (8).

2. A home heating stove as claimed in claim 1, characterised in that the hearth (20) is provided with a spiral groove (21).

3. A household heating stove as claimed in claim 2, characterised in that the surfaces of the second annular partition (18) and the first annular partition (19) are each provided with a helical groove (21).

4. A trumpet home heating stove as claimed in claim 1 or 2 or 3 wherein the feed pipe (7) axis is tangential to the hearth (20) circumference.

5. Household heating stove for skis according to claim 1 or 2, characterized in that the igniter (8) is a thermocouple igniter.

6. A trumpet home heating stove as claimed in claim 1, characterized in that the feeding assembly is provided with a hopper (2), a dosing mechanism (4), a suction cover (5), a blower (6) and a feeding pipe (7) in sequence along the direction of movement of the trumpet fuel, 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.

7. A home heating stove as claimed in claim 6, characterised in that the dosing mechanism (4) is provided with a speed governor capable of controlling the feeding speed.

8. The trumpet home heating stove as claimed in claim 1, wherein the heating assembly comprises a main heat exchanger water heater (11), a secondary heat exchanger water heater (15) and a heat exchange cover (13), the main heat exchanger water heater (11) wraps the combustion furnace (10), the heat exchange cover (13) is positioned above the combustion furnace (10) and is communicated with the upper combustion chamber (23) through a pipeline, the secondary heat exchanger water heater (11) is arranged inside the heat exchange cover (13), the combusted flue gas enters the heat exchange cover to exchange heat with the secondary heat exchanger water heater (15), the secondary heat exchanger water heater (11) is connected with the main heat exchanger water heater (11) through a water pipe, the secondary heat exchanger 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).

9. A trumpet as claimed in claim 8 in which the flue gas outlet duct (16) is connected to a dust removal system provided with a bag dust collector and an induced draft fan associated with the bag dust collector.

10. A method of using a trumpet as in any one of claims 1 to 9 wherein the method includes the steps of: