CN219934043U

CN219934043U - High-efficiency energy-saving stove core for solid fuel heating stove

Info

Publication number: CN219934043U
Application number: CN202321233608.XU
Authority: CN
Inventors: 刘忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-10-31
Anticipated expiration: 2033-05-19

Abstract

The utility model discloses a high-efficiency energy-saving furnace core for a solid fuel heating furnace, wherein the furnace core is arranged in a hearth of the heating furnace and comprises: an outer furnace shell, an inner furnace liner and a furnace bridge; the outer furnace shell is sleeved on the outer side of the inner furnace shell at intervals, and a sandwich-shaped secondary air supply cavity is formed between the outer furnace shell and the inner furnace shell; a plurality of secondary air-supplying holes are formed above the combustion chamber and are communicated with the secondary air-supplying cavity. According to the utility model, a part of air below the outer furnace shell can be transferred from the secondary air supply cavity to the upper part of the combustion chamber and is fed into the upper part of the combustion chamber from the secondary air supply hole, so that the partial high temperature of flame is reduced by using an air staged combustion technology as secondary air, the unburned fuel in the combustion chamber is combusted continuously, the emission of nitrogen oxides is reduced effectively, and the combustion efficiency is improved effectively.

Description

High-efficiency energy-saving stove core for solid fuel heating stove

Technical Field

The utility model relates to the technical field of heating equipment, in particular to a high-efficiency energy-saving stove core for a solid fuel heating stove.

Background

The solid fuel heating table is also called as solid fuel heating stove, and is a heating device for heating by using solid fuel to burn. In the existing solid fuel heating furnace, a hearth is often arranged in a furnace table main body, a detachable furnace core is arranged in the hearth, and solid fuel is placed in the furnace core to continue burning. For example, CN201620517136.4 discloses a diversified dining table heating stove. The lower part of the furnace core of the heating furnace is usually in a grid structure so as to place solid fuel, and air is supplied from the lower part, and after the fuel is combusted in the furnace core, high-temperature flue gas is sent out from the upper part. However, the combustion of the solid fuel is often insufficient by the air fed from below, and harmful substances such as nitrogen oxides are easily generated, and the combustion energy efficiency is also low. Therefore, further improvements are needed.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the high-efficiency energy-saving furnace core for the solid fuel heating furnace.

The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows: a high efficiency energy saving stove core for a solid fuel heating stove, the stove core being mounted within a hearth of the heating stove, the stove core comprising: an outer furnace shell, an inner furnace liner and a furnace bridge;

the outer furnace shell is of a hollow cylindrical structure; the outer furnace shell is sleeved on the outer side of the inner furnace at intervals, and a sandwich-shaped secondary air supply cavity is formed between the outer furnace shell and the inner furnace at intervals;

the combustion chamber is arranged around the inner furnace, a feeding port is arranged between the inner furnace and the outer furnace shell, and the feeding port is communicated with the combustion chamber; the furnace bridge is arranged below the combustion chamber and is provided with an air inlet; the top of the combustion chamber is provided with a fire outlet;

a plurality of secondary air-filling holes are formed in the upper portion of the combustion chamber, and the secondary air-filling holes are communicated with the secondary air supply cavity.

Optionally, the top end of the combustion chamber is in a top shrinkage structure with the cross section gradually narrowed from bottom to top.

Optionally, the top shrinkage structure is a truncated cone-shaped structure or a prismatic table-shaped structure, and the secondary air supply hole is formed in the top shrinkage structure.

Optionally, the secondary air-filling holes are arranged in a plurality of rows which are vertically spaced, and the secondary air-filling holes in two adjacent rows are distributed in an inserting way.

Optionally, a plurality of primary air-filling holes are formed in the bottom end of the combustion chamber, and the primary air-filling holes are communicated with the secondary air supply cavity.

Optionally, the bottom end of the combustion chamber is of a bottom end shrinkage structure with the cross section gradually narrowed from top to bottom; the bottom shrinkage structure is in a round table structure or a prismatic table structure, and the primary air supplementing holes are formed in the bottom shrinkage structure.

Optionally, the outer wall surface slope of bridge sets up, detachably erects in the shrink form structure in bottom.

Optionally, the furnace core further comprises a top cover; the top cover is arranged at the tops of the outer furnace shell and the inner furnace liner and can cover the secondary air supply cavity.

Optionally, a plurality of heat dissipation fins are arranged above the top cover.

Optionally, the radiating fins are in a spiral arc-shaped structure and are uniformly distributed along the circumference of the fire outlet towards the same rotation direction.

The ratio of oxide formation is related to factors such as the mixing ratio of fuel and air, combustion efficiency, and local higher combustion temperature of the combustion chamber. Air staged combustion technology is an effective method of reducing nitrogen oxide emissions. I.e. the air required for combustion is fed in two stages. In the first stage, primary air is fed into the main burner at the fire row position in the initial combustion stage, the air fed from the main burner is reduced to 70-80% of the total combustion air, so that the fuel is combusted under the anoxic fuel-rich combustion condition, at the moment, the reaction rate of generating NOx is reduced in the reducing atmosphere, and the generation amount of NOx in the combustion is restrained. In the second stage, in the later stage of combustion, a proper amount of secondary air, also called "over fire air", is fed into the flame combustion area, so that unburned fuel continues to burn, and the amount of generated NOx is limited at the moment, so that the emission of nitrogen oxides can be effectively reduced.

The utility model has the beneficial effects that: the solid fuel can be placed on a furnace frame in the combustion chamber from a feeding port, an air inlet with a grid hollowed-out structure is arranged below the furnace frame, and the air in the hearth can enter from the lower part of the outer furnace shell and enter into the lower area of the combustion chamber from the air inlet to be mixed with the fuel for combustion, so that the main combustion process is realized; then, a part of air below the outer furnace shell can be transferred to the upper part of the combustion chamber from the secondary air supply cavity and is sent to the upper part of the combustion chamber from the secondary air supply hole to serve as secondary air, namely 'over fire air', the air staged combustion technology is utilized to reduce the local high temperature of flame, the unburnt fuel in the combustion chamber is continuously combusted, the emission of nitrogen oxides is effectively reduced, and the combustion efficiency is effectively improved.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of the structure of the high efficiency energy saving furnace core of the present utility model;

FIG. 2 is a cross-sectional view of the energy efficient furnace core of FIG. 1;

fig. 3 is a schematic view of a heating furnace using the energy efficient core of fig. 1.

Description of main reference numerals:

100. a furnace core; 110. an outer furnace shell; 120. an inner furnace; 121. a secondary air supplementing hole; 122. a top shrink-like structure; 123. a primary air supplementing hole; 124. a bottom end shrinkage structure; 130. a furnace bridge; 131. an air inlet; 140. a secondary air supply chamber; 150. a combustion chamber; 160. a feeding port; 170. a fire outlet; 180. a top cover; 181. a heat radiation fin; 200. heating furnace; 210. and (3) a hearth.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless clearly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be connected directly or indirectly through an intermediary; the connecting device can be fixedly connected, detachably connected and integrally formed; may be a mechanical connection; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Examples

Referring to fig. 1 to 3, a high efficiency energy saving furnace core for a solid fuel heating furnace according to the present utility model, the furnace core 100 is installed in a hearth 210 of a heating furnace 200, and the furnace core 100 includes: an outer shell 110, an inner shell 120 and a bridge 130;

the outer furnace shell 110 is of a hollow cylindrical structure; the outer furnace shell 110 is sleeved outside the inner furnace 120 at intervals, and a sandwich secondary air supply cavity 140 is formed between the outer furnace shell and the inner furnace 120 at intervals;

the combustion chamber 150 is arranged around the inner furnace 120, a feeding port 160 is arranged between the inner furnace 120 and the outer furnace shell 110, and the feeding port 160 is communicated with the combustion chamber 150; the bridge 130 is arranged below the combustion chamber 150 and is provided with an air inlet 131; the top of the combustion chamber 150 is provided with a flame outlet 170;

a plurality of secondary air-supplying holes 121 are formed above the combustion chamber 150, and the secondary air-supplying holes 121 are communicated with the secondary air-supplying cavity 140.

The ratio of oxide formation is related to factors such as the fuel to air mixing ratio, combustion efficiency, and the local higher combustion temperature of the combustion chamber 150. Air staged combustion technology is an effective method of reducing nitrogen oxide emissions. I.e. the air required for combustion is fed in two stages. In the first stage, primary air is fed into the main burner at the fire row position in the initial combustion stage, the air fed from the main burner is reduced to 70-80% of the total combustion air, so that the fuel is combusted under the anoxic fuel-rich combustion condition, at the moment, the reaction rate of generating NOx is reduced in the reducing atmosphere, and the generation amount of NOx in the combustion is restrained. In the second stage, in the later stage of combustion, a proper amount of secondary air, also called "over fire air", is fed into the flame combustion area, so that unburned fuel continues to burn, and the amount of generated NOx is limited at the moment, so that the emission of nitrogen oxides can be effectively reduced.

In the utility model, solid fuel can be placed on a furnace frame in the combustion chamber 150 from a feeding port 160, an air inlet 131 with a grid hollowed-out structure is arranged below the furnace frame, and air in the hearth 210 can enter from below the outer furnace shell 110 and enter into a region below the combustion chamber 150 from the air inlet to be mixed with fuel for combustion as a main combustion process; then, a part of the air below the outer furnace shell 110 can be transferred from the secondary air supply cavity 140 to the upper part of the combustion chamber 150, and is sent from the secondary air supply hole 121 to the upper part of the combustion chamber 150, and is used as secondary air, namely 'over fire', so that the local high temperature of flame is reduced by utilizing the air staged combustion technology, the unburnt fuel in the combustion chamber 150 is continuously combusted, the emission of nitrogen oxides is effectively reduced, and the combustion efficiency is effectively improved.

In this embodiment, the top end of the combustion chamber 150 is a top constriction 122 that tapers in cross section from bottom to top. The secondary air supply holes 121 are disposed on the top shrinkage structure 122, and the secondary air supply holes 121 can be inclined toward the middle and lower part of the combustion chamber 150 on the inclined surface of the top shrinkage structure 122 to collide with the ascending flame air flow, thereby improving the collision mixing effect of the secondary air and the ascending fuel.

Specifically, in order to facilitate sheet metal processing, the top shrinkage structure 122 is a truncated cone-shaped structure or a prismatic table-shaped structure, and the secondary air supply hole 121 is disposed in the top shrinkage structure 122.

Further, the secondary air supply holes 121 are arranged in a plurality of rows vertically spaced, and the plurality of secondary air supply holes 121 in two adjacent rows are distributed in an empty space. The secondary air supply holes 121 are distributed in a plurality of rows up and down, so that secondary air can be supplied from a plurality of heights and positions toward the combustion chamber 150 by being distributed in the air insertion space.

In some embodiments, the bottom end of the combustion chamber 150 is provided with a plurality of primary air-supplying holes 123, and the primary air-supplying holes 123 are communicated with the secondary air supply cavity 140. The primary air supply hole 123 provides a secondary air supply path from the lower side surface of the combustion chamber 150, in addition to the air inlet 131 of the bridge 130.

Specifically, the bottom end of the combustion chamber 150 is a bottom end constriction 124 with a cross section gradually narrowing from top to bottom; the bottom-end shrinkage structure 124 is a truncated cone-shaped structure or a prismatic table-shaped structure, and the primary air-compensating hole 123 is disposed in the bottom-end shrinkage structure 124. The primary air supply hole 123 is provided on the inclined surface of the bottom-end-contracted structure 124, and the primary air supply hole 123 can be inclined to supply air to the upper middle part of the combustion chamber 150 to collide with the solid fuel and to increase the mixing degree of air and fuel.

In this embodiment, the inner furnace 120 is a middle cylinder, and the upper and lower ends are contracted toward the two ends; correspondingly, the secondary air supply chamber 140 formed by the inner furnace pipe 120 and the cylindrical outer furnace shell 110 consists of a gradually-reduced section, an equal-width section and a gradually-expanded section, wherein the gradually-reduced section can compress and accelerate air, the equal-width section can stabilize air flow, and the gradually-expanded section can expand and release air and spray the air towards the secondary air supply hole 121. This structure can be understood as a venturi structure that accelerates compressed air, which is injected and replenished above the combustion chamber 150.

In this embodiment, the outer wall surface of the bridge 130 is disposed obliquely, and is detachably mounted on the bottom end shrinkage structure 124. The furnace bridge 130 is detachably arranged on the bottom end shrinkage structure 124, and is convenient to install and detach and clean.

In this embodiment, the furnace core 100 further comprises a top cover 180; the top cover 180 is disposed on top of the outer shell 110 and the inner shell 120, and covers the secondary air supply chamber 140. The top cover 180 is fixedly connected with the outer furnace shell 110 and the inner furnace 120 through welding, and has a simple structure and is convenient for production and manufacture.

Specifically, a plurality of heat dissipation fins 181 are disposed above the top cover 180. The heat dissipation fins 181 can increase the heat dissipation area of the stove core 100, so that the heat of the combustion chamber 150 can be more quickly diffused into the hearth 210 of the heating stove 200 for heating or cooking.

Further, the heat dissipation fins 181 are in a spiral arc structure, and are uniformly distributed along the circumference of the fire outlet 170 towards the same rotation direction. The hot air flow rising along with the hot air in the hearth 210 can form a spiral rising air flow effect along the heat dissipation fins 181 with spiral arc shapes, and the hot air is more concentrated in the central axis area of the hearth 210 to rise, so that the cooking area above the hearth 210 is heated intensively.

Of course, the present utility model is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications and substitutions without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims

1. A high efficiency energy saving stove core for a solid fuel heating stove, the stove core (100) being mounted in a hearth (210) of a heating stove (200), characterized in that the stove core (100) comprises: an outer furnace shell (110), an inner furnace (120) and a furnace bridge (130);

the outer furnace shell (110) is of a hollow cylindrical structure; the outer furnace shell (110) is sleeved on the outer side of the inner furnace (120) at intervals, and a sandwich-shaped secondary air supply cavity (140) is formed between the outer furnace shell and the inner furnace (120);

the combustion chamber (150) is arranged around the inner furnace (120), a feeding port (160) is arranged between the inner furnace (120) and the outer furnace shell (110), and the feeding port (160) is communicated with the combustion chamber (150); the furnace bridge (130) is arranged below the combustion chamber (150) and is provided with an air inlet (131); a fire outlet (170) is formed in the top of the combustion chamber (150);

a plurality of secondary air-filling holes (121) are formed in the upper portion of the combustion chamber (150), and the secondary air-filling holes (121) are communicated with the secondary air supply cavity (140).

2. The energy efficient wick for a solid fuel heating stove as set forth in claim 1, wherein: the top end of the combustion chamber (150) is provided with a top shrinkage-shaped structure (122) with the cross section gradually narrowing from bottom to top.

3. The energy efficient wick for a solid fuel heating stove as set forth in claim 2, wherein: the top shrinkage structure (122) is in a truncated cone-shaped structure or a prismatic table-shaped structure, and the secondary air supplementing holes (121) are formed in the top shrinkage structure (122).

4. A high efficiency energy saving stove core for a solid fuel heating stove as claimed in claim 3, wherein: the secondary air supply holes (121) are arranged in a plurality of rows which are vertically spaced, and the secondary air supply holes (121) in two adjacent rows are distributed in an inserting mode.

5. The energy efficient wick for a solid fuel heating stove as set forth in claim 1, wherein: a plurality of primary air-filling holes (123) are formed in the bottom end of the combustion chamber (150), and the primary air-filling holes (123) are communicated with the secondary air supply cavity (140).

6. The energy efficient wick for a solid fuel heating stove of claim 5, wherein: the bottom end of the combustion chamber (150) is provided with a bottom end shrinkage-shaped structure (124) with the cross section gradually narrowing from top to bottom; the bottom shrinkage structure (124) is in a truncated cone-shaped structure or a prismatic table-shaped structure, and the primary air supplementing holes (123) are formed in the bottom shrinkage structure (124).

7. The energy efficient wick for a solid fuel heating stove of claim 6, wherein: the outer wall surface of the furnace bridge (130) is obliquely arranged and detachably erected on the bottom end shrinkage-shaped structure (124).

8. The energy efficient wick for a solid fuel heating stove as set forth in claim 1, wherein: the furnace core (100) further comprises a top cover (180); the top cover (180) is arranged at the top of the outer furnace shell (110) and the top of the inner furnace (120) and can cover the secondary air supply cavity (140).

9. The energy efficient wick for a solid fuel heating stove of claim 8, wherein: a plurality of heat radiation fins (181) are arranged above the top cover (180).

10. The energy efficient wick for a solid fuel heating stove of claim 9, wherein: the radiating fins (181) are of spiral arc-shaped structures and are uniformly distributed along the circumferential direction of the fire outlet (170) towards the same rotation direction.