CN216591812U

CN216591812U - Induced draft type waste heat recovery firewood stove

Info

Publication number: CN216591812U
Application number: CN202121004821.4U
Authority: CN
Inventors: 侯国山; 王平
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2022-05-24
Anticipated expiration: 2031-05-08

Abstract

The utility model relates to an induced draft type waste heat recovery firewood stove, which mainly comprises a shell, a bottom, a door, refractory materials, an air inlet ring, an induced draft fan, an air pipe, an air valve, a heat preservation and heat exchange pressure water tank and a pot. The combustion chamber of the utility model adopts negative pressure induced air, has quick fire, strong firepower and quick heating, and is completely smokeless indoors. The biomass fuel used in the utility model belongs to renewable energy sources, and is a product with zero carbon emission. The utility model can use wood blocks, wood segments, branches, straws, sawdust, leaves, biomass molding particles and the like as fuels, and the fuel cost for processing cooked food is low. The utility model has the advantages of high reliability, low price, energy saving, no pollution, long service life, safety, simple production process, large-scale industrial production and wide market prospect.

Description

Induced draft type waste heat recovery firewood stove

Technical Field

The utility model relates to the technical field of biomass gasification combustion, in particular to an induced air type waste heat recovery firewood stove.

Background

The firewood stove is also called a biomass cooking stove, a plant cooking stove and an energy-saving firewood stove. The firewood stove uses wood blocks, wood sections, branches, straws, sawdust, leaves and biomass molding particles as fuel, and uses a corresponding stove structure to enable the fuel to be polymerized at a stove mouth by the heat energy of wood direct combustion and wood gasification combustion so as to carry out cooking work. At present, only household firewood furnaces are sold in the market, and the air-induced waste heat recovery firewood furnaces are not seen to be sold in the market, so that the heat production quantity of the household firewood furnaces is too small, and the processing task of cooked food of hundreds of jin and even more can not be completed at one time.

Disclosure of Invention

In view of the above situation, the present invention aims to provide an induced draft type waste heat recovery firewood stove capable of rapidly completing several hundred jin and even a very heavy cooked food processing task at one time.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides an induced air formula waste heat recovery firewood stove comprises shell, end, door, refractory material, air inlet ring, draught fan, tuber pipe, blast gate, heat preservation heat transfer pressure water pitcher, pot, characterized by: the bottom, the bottom refractory material, the lower air inlet ring, the lower part of the shell, the refractory material at the lower part of the shell, the door annular plate, the door refractory material, the door frame inner annular plate, the door frame outer annular plate, the sealing ring, the upper air inlet ring and the pot together enclose a non-closed space which is a combustion chamber; the induced draft fan is communicated with the atmosphere through an induced draft pipe, a heat exchange pipe, a smoke pipe, a gap between the pot and the refractory material on the upper part of the shell, a combustion chamber, an upper air inlet hole, a lower air inlet hole, an inclined air inlet hole, an upper air inlet ring, a lower air inlet ring, an upper air pipe, a lower air pipe and an upper air valve.

One or more circles of small holes are arranged on the upper air inlet ring and are upper air inlet holes.

Two circles of small holes are formed in the lower air inlet ring, the lower circle of small holes are lower air inlet holes, and the connecting line of the center of the lower air inlet holes and the center of the lower air inlet ring is parallel to the horizontal plane; above-mentioned round aperture is oblique fresh air inlet, and the line at oblique fresh air inlet center and lower air inlet circle center is greater than 30 degrees with the contained angle of horizontal plane, is less than 90 degrees, if the line at oblique fresh air inlet center and lower air inlet circle center is a with the contained angle of horizontal plane, then has: 30 degrees < a < 90 degrees.

And a sealing ring is arranged between the inner annular plate of the door frame and the outer annular plate of the door frame.

Compared with the prior art, the utility model has the following advantages:

1. the circle of lower air inlet holes and the circle of inclined air inlet holes on the lower air inlet ring at the lower part of the combustion chamber can ensure that the air inlet volume is large and uniform, the fuel combustion gasification volume is large, and the air inlet holes can not be blocked at any time.

2. The combustion chamber of the utility model adopts negative pressure induced air, has quick fire, strong firepower and quick heating, and is completely smokeless indoors.

3. The biomass fuel used in the utility model belongs to renewable energy sources, and is a product with zero carbon emission.

4. The firepower of the utility model is adjustable from large to small, and the utility model can be used for processing raw materials into various cooked foods in the processing modes of steaming, frying, boiling and the like.

5. The fuel adaptability is strong. The utility model can use wood blocks, wood segments, branches, straws, sawdust, leaves, biomass molding particles and the like as fuels, and the fuel cost for processing cooked food is low.

6. The utility model has the advantages of high reliability, low price, energy saving, no pollution, long service life, safety, simple production process, large-scale industrial production and wide market prospect.

Drawings

Fig. 1 is a schematic sectional view of an induced draft type waste heat recovery firewood stove.

The utility model is further illustrated below with reference to fig. 1 and the examples:

in the figure 1, 1 is a lower air inlet ring, 2 is a lower air inlet hole, 3 is an inclined air inlet hole, 4 is a shell lower part refractory material, 5 is a door frame inner annular plate, 6 is a door frame outer annular plate, 7 is a sealing ring, 8 is a door, 9 is a door refractory material, 10 is a door annular plate, 11 is an upper air inlet ring, 12 is an upper air inlet hole, 13 is a shell upper part refractory material, 14 is a shell, 15 is a pot, 16 is a smoke pipe, 17 is a heat preservation and heat exchange pressure water tank shell, 18 is a hot water outlet pipe, 19 is a pressure water tank, 20 is a heat exchange pipe, 21 is a water tank heat preservation material, 22 is a tap water pipe, 23 is an air induction pipe, 24 is an induced draft fan, 25 is an air pipe support, 26 is an upper air valve, 27 is an upper part, 28 is a lower air valve, 29 is a lower air pipe, 30 is a bottom, 31 is a bottom refractory material, and 32 is a leg.

Detailed Description

Fig. 1 illustrates a structure form of an induced draft type waste heat recovery firewood stove.

An induced draft type waste heat recovery firewood stove comprises a shell, a bottom, a door, refractory materials, an upper air inlet ring, a lower air inlet ring, an induced draft fan, an air pipe, an air valve, a heat preservation and heat exchange pressure water tank and a pot, wherein legs 32 are fixedly installed with the bottom 30, the bottom 30 is fixedly installed with the lower end of the shell 14, the upper edge of the bottom 30 is provided with the refractory materials 31, a door frame inner annular plate 5 is fixedly installed with the shell 14, a door frame outer annular plate 6 is fixedly installed with the shell 14, a sealing ring 7 is arranged between the door frame outer annular plate 6 and the door frame inner annular plate 5, the door annular plate 10 is fixedly installed with the door 8, the door refractory materials 9 are arranged on the inner sides of the door annular plate 10 and the door 8, the door 8 is hinged with the door frame outer annular plate 6, the shell upper part refractory materials 13 are arranged on the inner side of the upper part of the shell 14, the upper air inlet ring 11 is fixedly installed in the shell upper part refractory materials 13, the shell lower part refractory materials 4 are arranged on the inner side of the lower part of the shell 14, the pot 15 is fixedly arranged at the upper end of the induced draft type waste heat recovery firewood stove, and the lower air inlet ring 1 is fixedly arranged in the bottom refractory material 31; a non-closed space which is a combustion chamber is defined by the bottom 30, the bottom refractory material 31, the lower air inlet ring 1, the lower part of the shell 14, the lower part refractory material 4 of the shell, the door 8, the door annular plate 10, the door refractory material 9, the door frame inner annular plate 5, the door frame outer annular plate 6, the sealing ring 7, the upper air inlet ring 11 and the pot 15; the cross sections of the upper air inlet ring 11 and the lower air inlet ring 1 are polygonal; the smoke tube 16 is fixedly installed with the outer shell 14; the heat-preservation heat-exchange pressure water tank comprises a heat-preservation heat-exchange pressure water tank shell 17, a water tank heat-preservation material 21, a pressure water tank 19, a heat exchange pipe 20, a hot water outlet pipe 18 and a tap water pipe 22; one or more heat exchange tubes 20; two ends of a heat exchange tube 20 are respectively fixedly arranged with a smoke tube 16 and an induced draft tube 23, the smoke tube 16 and the induced draft tube 23 are respectively fixedly arranged with the upper end and the lower end of a pressure water tank 19, the pressure water tank 19 is fixedly arranged in a heat-preservation heat-exchange pressure water tank shell 17 through a water tank heat-preservation material 21, a hot water outlet tube 18 is communicated with the upper part of the pressure water tank 19, a tap water tube 22 is communicated with the lower part of the pressure water tank 19, and the heat-preservation heat-exchange pressure water tank shell 17 is fixedly arranged on a bracket 25; the induced draft fan 24 is fixedly arranged on the bracket 25; the induced draft fan 24 is communicated with the atmosphere through an induced draft pipe 23, one or more heat exchange pipes 20, a smoke pipe 16, a gap between a pot and a refractory material on the upper part of the shell, a combustion chamber, an upper air inlet hole 12, an upper air inlet ring 11, an upper air pipe 27 and an upper air valve 26; the induced draft fan 24 is communicated with the atmosphere through an induced draft pipe 23, one or more heat exchange pipes 20, a smoke pipe 16, a gap between the pot 15 and the refractory material 13 on the upper part of the shell, a combustion chamber, a lower air inlet hole 2, a lower air inlet ring 1, a lower air pipe 29 and a lower air valve 28; the induced draft fan 24 is communicated with the atmosphere through an induced draft pipe 23, one or more heat exchange pipes 20, a smoke pipe 16, a gap between the boiler and the refractory material on the upper part of the shell, a combustion chamber, an inclined air inlet hole 3, a lower air inlet ring 1, a lower air pipe 29 and a lower air valve 28.

One or more circles of small holes are arranged on the upper air inlet ring 11 and are upper air inlet holes 12.

The lower air inlet ring 1 is provided with two circles of small holes, one circle of small holes below the lower air inlet ring 1 are lower air inlet holes 2, the connecting line of the centers of the lower air inlet holes 2 and the center of the lower air inlet ring 1 is parallel to the horizontal plane, and the air supply direction of the lower air inlet holes 2 is on the extension line of the connecting line of the centers of the lower air inlet holes 2 and the center of the lower air inlet ring 1, namely the horizontal direction; the round aperture of the upper surface of the lower air inlet ring 1 is an oblique air inlet hole 3, the included angle between the connecting line of the center of the oblique air inlet hole 3 and the center of the lower air inlet ring 1 and the horizontal plane is more than 30 degrees and less than 90 degrees, if the connecting line of the center of the oblique air inlet hole 3 and the center of the lower air inlet ring 1 and the included angle of the horizontal plane are a, then the angle has: 30 degrees < a < 90 degrees. The air supply direction of the oblique air inlet holes 3 is on the extension line of the connecting line of the centers of the oblique air inlet holes 3 and the center of the lower air inlet ring 1.

A sealing ring 7 is arranged between the inner annular plate 5 of the doorframe and the outer annular plate 6 of the doorframe, and when the door 8 is tightly combined with the sealing ring 7, the lower part of the combustion chamber is completely closed.

When the utility model is used, the door 8 is opened to load fuel into the combustion chamber and ignite, the upper air valve 26 and the lower air valve 28 are adjusted to proper positions, the door 8 is closed tightly, the induced draft fan 24 is opened, the combustion chamber becomes negative pressure, under the action of pressure difference, air is rapidly sprayed to the bottom of the combustion chamber from the lower air valve 28, the lower air pipe 29, the lower air inlet ring 1 and a plurality of lower air inlet holes 2 in a circle, and the fuel at the bottom of the combustion chamber is greatly gasified; the lower air inlet ring 1 of the utility model has a circle of lower air inlet holes 2 in a transverse air inlet mode, which can ensure that the air inlet quantity is large and uniform, the fuel gasification quantity is large, and the air inlet holes can not be blocked at any time. Under the action of pressure difference, air is rapidly sprayed to the upper part of the combustion chamber from the downdraft valve 28, the downdraft pipe 29, the downdraft ring 1 and the circle of the plurality of inclined air inlet holes 3, and a circle of air curtain is formed from the circle of the plurality of inclined air inlet holes 3 to the upper part of the combustion chamber, so that all combustible gas contacting with the air curtain can be rapidly combusted, and a large amount of heat is released. Under the action of pressure difference, air is rapidly sprayed to the upper part of the combustion chamber from the upper air valve 26, the upper air pipe 27, the upper air inlet ring 11 and the upper air inlet hole 12, high-temperature combustible gas which rises to the upper part of the combustion chamber is mixed with air coming out of the upper air inlet hole 12 for combustion, the pot 15 is heated, and high-temperature waste gas is discharged out of the combustion chamber through a gap between the pot 15 and the refractory material 13 on the upper part of the shell, the smoke pipe 16, the heat exchange pipe 20, the air induction pipe 23 and the air induction fan 24; when the high-temperature exhaust gas passes through the heat exchange pipe 20, the water in the pressure water tank 19 is heated; the closing degree of the lower air valve 28 is adjusted, and the air inlet quantity of the combustion chamber can be adjusted, so that the gasification quantity of the fuel in the combustion chamber is controlled, and the firepower of the combustion chamber is further controlled; the closing degree of the upper air valve 26 is adjusted, the air intake of the upper part of the combustion chamber can be adjusted, so that the combustible gas can be completely combusted, the complete combustion degree can be judged according to the blackness of the smoke discharged from the smoke pipe, and the smoke discharged when the combustion is complete is colorless. The lower air valve 28, the upper air valve 26 and the induced draft fan 24 are closed, the fuel in the combustion chamber is completely isolated from the air, and the combustion in the combustion chamber can be completely stopped; the utility model can be continuously used for a plurality of times and then deashing once through the door.

Claims

1. The utility model provides an induced air formula waste heat recovery firewood stove comprises shell, end, door, refractory material, air inlet ring, draught fan, tuber pipe, blast gate, heat preservation heat transfer pressure water pitcher, pot, characterized by: the bottom, the bottom refractory material, the lower air inlet ring, the lower part of the shell, the refractory material at the lower part of the shell, the door annular plate, the door refractory material, the door frame inner annular plate, the door frame outer annular plate, the sealing ring, the upper air inlet ring and the pot together enclose a non-closed space which is a combustion chamber; the induced draft fan is communicated with the atmosphere through an induced draft pipe, a heat exchange pipe, a smoke pipe, a gap between the pot and the refractory material on the upper part of the shell, a combustion chamber, an upper air inlet hole, a lower air inlet hole, an inclined air inlet hole, an upper air inlet ring, a lower air inlet ring, an upper air pipe, a lower air pipe and an upper air valve.

2. The induced draft type waste heat recovery firewood stove of claim 1, characterized in that: one or more circles of small holes are arranged on the upper air inlet ring and are upper air inlet holes.

3. The induced draft type waste heat recovery firewood stove of claim 1, characterized in that: two circles of small holes are formed in the lower air inlet ring, the lower circle of small holes are lower air inlet holes, and the connecting line of the center of the lower air inlet holes and the center of the lower air inlet ring is parallel to the horizontal plane; above-mentioned round aperture is oblique fresh air inlet, and the line at oblique fresh air inlet center and lower air inlet circle center is greater than 30 degrees with the contained angle of horizontal plane, is less than 90 degrees, if the line at oblique fresh air inlet center and lower air inlet circle center is a with the contained angle of horizontal plane, then has: 30 degrees < a < 90 degrees.

4. The induced draft type waste heat recovery firewood stove of claim 1, characterized in that: and a sealing ring is arranged between the inner annular plate of the door frame and the outer annular plate of the door frame.