CN212005646U - A kind of forward and reverse combustion combined coal-fired stove - Google Patents

Abstract

The utility model discloses a coal-fired stove combined with forward and reverse combustion, which comprises a base and a furnace body installed above the base, a grate is arranged between the base and the furnace body, a smoke box is connected to the rear of the furnace body, and a furnace body is arranged inside the furnace body. There is a vertical partition for separating the inner space, forming a pyrolysis chamber at the front and a cooking fire channel at the rear, the upper end of the partition is connected to the furnace body, and a connected pyrolysis chamber is arranged between the lower end of the partition and the grate. A coal feeding port is arranged above the pyrolysis chamber and a coal feeding door, and a cooking port is arranged above the cooking fire channel. It has the advantages of anti-burning and eliminating smoke, and strong firepower for cooking, and eliminates the defects of weak anti-burning and more black smoke. The heating period is long, and the firepower is moderate and stable; the cooking period is short, and the firepower is strong. Sending the semi-char to the burning area before cooking can quickly increase the firepower; while the hot-burning area is small, the firepower will drop rapidly after the semi-char is burnt out, and no fuel will be wasted.

Description

A kind of forward and reverse combustion combined coal-fired stove

technical field

The utility model relates to the field of cooking stoves, in particular to a coal-fired stove combined with forward and reverse combustion.

Background technique

In my country's rural and suburban areas, there are still a large number of households that use relatively scattered coal-fired heating methods, which are not only inefficient and polluting, but also have an impact on the environment several times the proportion of their fuel consumption. At present, my country consumes a large amount of coal every year, of which the civil part is basically all incinerated in a decentralized manner, and no environmental protection measures such as dust removal and desulfurization are taken.

The combustion process of household coal-fired stoves is cyclical. In the early stage of combustion, air is easily insufficient, and the gas produced by coal pyrolysis and gasification cannot be fully burned, and a large number of toxic and combustible components are discharged with the flue gas, causing environmental pollution and energy loss; the coal seam in the later stage of combustion Thinning, excess air will reduce furnace temperature and heat transfer efficiency and increase exhaust heat loss. Some furnace types only improve the combustion efficiency of coal by means of high temperature oxygen enrichment, but will increase the emission of nitrogen oxides (NOx). In addition, increasing the combustion temperature will also increase the reverse reaction of desulfurization and reduce the desulfurization efficiency in the furnace.

Existing stoves are divided into two types, which are positive-firing and reverse-firing, among which positive-firing is the most common direct-firing method. When the solid fuel burns, the flame spreads along the natural flow direction of the hot flue gas. The advantage is that the combustion intensity is high and the firepower is strong, which can meet the cooking needs of users. of fuel. When the anti-burning solid fuel is burned, the flame spreads against the natural flow direction of the hot flue gas. The advantage is that it can delay the speed of volatilization analysis. The furnace temperature is high and the combustion is sufficient, which can basically eliminate black smoke. Low, weak firepower, not suitable for cooking, suitable for high volatile fuel such as bituminous coal.

At present, most household coal-fired stoves use the common burning principle. Air enters from the bottom of the stove and passes through the entire furnace. The combustion process is periodic. At the initial stage of combustion, air is easily insufficient, and the gas produced by coal pyrolysis and gasification cannot be fully burned. A large number of toxic and combustible components are discharged with the flue gas, causing environmental pollution and energy loss; the coal seam is thinned in the later stage of combustion, and the excess air will reduce the furnace temperature and heat transfer efficiency, and increase the heat loss of exhaust gas.

Therefore, how to provide a coal-fired stove that can overcome the above-mentioned defects is a technical problem that those skilled in the art need to solve at present.

Utility model content

The purpose of this utility model is to provide a coal-fired stove combined with forward and reverse combustion. A pyrolysis chamber and a cooking fire channel are arranged inside the furnace body, and the forward and reverse combustion are carried out respectively, which has the advantages of both combustion methods and overcomes the Defects in the prior art.

In order to solve the above technical problems, the utility model provides a coal-fired stove combined with forward and reverse combustion, comprising a base and a furnace body installed above the base, and a grate is arranged between the base and the furnace body, so The rear part of the furnace body is connected with a smoke box, and the furnace body is provided with a vertical partition plate for separating the internal space, forming a pyrolysis chamber in the front part and a cooking fire channel in the rear part, and the upper end of the partition plate is connected to In the furnace body, a gap is provided between the lower end of the partition plate and the grate, which communicates the pyrolysis chamber and the cooking fire channel and is used for the passage of semi-char, and a heater is arranged above the pyrolysis chamber. The coal port is provided with a coal feeding door, and a cooking port is provided above the cooking fire channel.

Preferably, the furnace body and the outer shell of the smoke box include an inner tank and an outer tank that are spaced apart from each other, a water jacket interlayer is formed between the inner tank and the outer tank, and the upper part of the smoke box is provided with a communication The water outlet of the water jacket interlayer, and the lower part of the furnace body is provided with a water return port that communicates with the water jacket interlayer.

Preferably, the smoke box includes a vertical connection part and a horizontal transition part, one end of the transition part is connected to the upper part of the cooking fire channel, and the other end of the transition part is connected to the lower end of the connection part, so The upper end of the connecting portion communicates with the chimney, the bottom of the transition portion is provided with a bottom ash cleaning door, and both sides of the connecting portion are provided with side ash cleaning doors.

Preferably, the volume of the pyrolysis chamber is larger than the volume of the cooking fire.

Preferably, a drawable ash hopper is installed in the base.

Preferably, a water tank communicating with the water jacket interlayer is provided in the separator.

Preferably, the cooking port is disposed just above the cooking fire channel, and the coal feeding port is disposed obliquely above the pyrolysis chamber, close to the front end of the pyrolysis chamber.

Preferably, the smoke box is provided with a heat exchange pipe that communicates with the water jacket interlayer.

Preferably, the plurality of the heat exchange tubes in the connecting portion extend from front to rear and are inclined upward, and the plurality of the heat exchange tubes in the transition portion extend laterally.

Preferably, the connecting portion is provided with an explosion-proof valve communicating with the water jacket interlayer.

The utility model provides a coal-fired stove combined with forward and reverse combustion. There is a vertical partition for separating the inner space, forming a pyrolysis chamber at the front and a cooking fire channel at the rear, the upper end of the partition is connected to the furnace body, and a connected pyrolysis chamber is arranged between the lower end of the partition and the grate. A coal feeding port is arranged above the pyrolysis chamber and a coal feeding door, and a cooking port is arranged above the cooking fire channel.

By setting a pyrolysis chamber and a cooking fire channel inside the furnace body, the pyrolysis chamber is the reverse burning area, and the cooking fire channel is the normal burning area. After the fuel is added, it is accumulated in the pyrolysis chamber, and the primary air is supplied through the grate. , The lower part of the pyrolysis chamber and the cooking fire is the main combustion area. Coal combustion is combined with the adjustment of the air supply to generate heat, and a small part of the heat is used for the upper fuel to be pyrolyzed in an oxygen-depleted state to generate pyrolysis gas and semi-coke. Smoke moves forward. In the main combustion area, the pyrolysis gas and semi-coke are co-burned; due to the negative pressure formed by the chimney's pulling force, the pyrolysis products of coal must be fully burned through the high-temperature semi-coke combustion layer, which can effectively eliminate the black smoke produced by the burning of bituminous coal. and reduce nitrogen oxide production. The burning flame enters the chimney through the cooking port and the smoke box, and heats the cooker along the way to complete the heating. The cooking fire channel mainly stores the semi-char after pyrolysis in the pyrolysis chamber, and enters the cooking fire channel by shaking the grate and operating the fire hook. The semi-char is burned by the normal burning method, and there is no problem of concentrated precipitation of volatile matter, and it can also improve the cooking firepower.

It has the advantages of anti-burning and eliminating smoke, and strong firepower for cooking, and eliminates the defects of weak anti-burning and more black smoke. It is more in line with the user's usage habits. The user uses a dual-purpose stove for heating and cooking. The heating period is long, and the firepower is required to be moderate and stable; the cooking period is short, and the firepower is required. Sending the semi-char to the burning area before cooking can quickly increase the firepower; while the hot-burning area is small, the firepower will drop rapidly after the semi-char is burnt out, and no fuel will be wasted.

Description of drawings

FIG. 1 is a schematic structural diagram of a specific embodiment of a coal-fired stove combined with forward and reverse combustion provided by the present invention.

Detailed ways

The core of the utility model is to provide a coal-fired stove combined with forward and reverse combustion. A pyrolysis chamber and a cooking fire channel are arranged inside the furnace body, and the forward and reverse combustion are carried out respectively. Defects in the prior art.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a specific embodiment of a coal-fired stove combined with forward and reverse combustion provided by the present invention.

The specific embodiment of the present utility model provides a coal-fired stove combined with forward and reverse combustion, comprising a base 1 and a furnace body 2, the furnace body 2 is installed above the base 1, and a grate 3 is arranged between the base 1 and the furnace body 2, A smoke box 4 is connected to the rear of the furnace body 2 , that is, the end connected with the smoke box 4 is the rear, and the opposite end is the front. Inside the furnace body 2, a vertical partition plate 5 for separating the internal space is arranged to form a pyrolysis chamber 6 at the front and a cooking fire channel 7 at the rear. The upper end of the partition plate 5 is connected to the furnace body 2, and the A gap is set between the lower end and the grate 3. This gap is used to communicate the pyrolysis chamber 6 and the cooking fire 7, and at the same time, it is used for the passage of semi-coke. A coal feeding port is set above the pyrolysis chamber 6 for adding fuel. , and a coal feeding door 8 is provided, and a cooking port 9 is provided above the cooking fire channel 7 for placing and adding cooking utensils.

By arranging a pyrolysis chamber 6 and a cooking fire channel 7 inside the furnace body 2, the pyrolysis chamber 6 is a back-burning area, and the cooking fire channel 7 is a normal-burning area. Primary air, above the grate 3, the pyrolysis chamber 6 and the lower part of the cooking fire channel 7 are the main combustion areas. Coal combustion is combined with the adjustment of the air supply to generate heat, and a small part of the heat is used for the upper fuel to be pyrolyzed in an oxygen-depleted state to generate heat. Degassing and semi-coke, most of the heat goes forward with the flue gas. In the main combustion area, the pyrolysis gas and semi-coke are co-burned; due to the negative pressure formed by the chimney's pulling force, the pyrolysis products of coal must be fully burned through the high-temperature semi-coke combustion layer, which can effectively eliminate the black smoke produced by the burning of bituminous coal. and reduce nitrogen oxide production. The combustion flame enters the chimney through the cooking port 9 and the smoke box 4, and heats the cooker along the way to complete the heating. The cooking fire channel 7 mainly stores the semi-char after pyrolysis in the pyrolysis chamber 6 , and enters the cooking fire channel 7 by shaking the grate 3 and operating the fire hook. The semi-char is burned by the normal burning method, and there is no problem of concentrated precipitation of volatile matter, and it can also improve the cooking firepower.

It has the advantages of anti-burning and eliminating smoke, and strong firepower for cooking, and eliminates the defects of weak anti-burning and more black smoke. The volume of the pyrolysis chamber 6 is larger than that of the cooking fire channel 7, which is more in line with the user's usage habits. The user uses a dual-purpose stove for heating and cooking, and the heating period is long, requiring moderate and stable firepower; the cooking period is short, requiring strong firepower. Sending the semi-char to the burning area before cooking can quickly increase the firepower; while the hot-burning area is small, the firepower will drop rapidly after the semi-char is burnt out, and no fuel will be wasted.

A pullable ash hopper 16 can also be installed in the base 1, and the air supply volume can be adjusted by the size of the ash hopper 16 opening and closing. The cooking port 9 is arranged just above the cooking fire 7, which is convenient for placing cooking utensils, and the coal feeding port is arranged obliquely above the pyrolysis chamber 6, close to the front end of the pyrolysis chamber 6, so as to facilitate the operation of coal feeding. Or adjust the installation, connection and arrangement of each component according to the situation, all within the protection scope of the present invention.

In the forward and reverse combustion combined coal-fired stove provided by the specific embodiment of the present invention, in order to improve the heating effect, a water heating system can be added, and the outer casings of the furnace body 2 and the smoke box 4 include an inner tank 10 and an outer tank 11 spaced apart from each other, A water jacket interlayer is formed between the inner liner 10 and the outer liner 11 , the upper part of the smoke box 4 is provided with a water outlet 12 which communicates with the water jacket interlayer, and the lower part of the furnace body 2 is provided with a water return port 13 which communicates with the water jacket interlayer. During the use of the stove, the combustion flame enters the chimney through the cooking port 9 and the smoke box 4, heats the cooker along the way, heats the water in the water jacket interlayer, and transfers the heat to the circulating water through the water outlet 12 and the water return port 13 to complete the heating.

Further, the smoke box 4 includes a vertical connection part and a horizontal transition part, one end of the transition part is connected to the upper part of the cooking fire 7, the other end of the transition part is connected to the lower end of the connection part, and the upper end of the connection part is connected to the chimney, which is convenient for smoke. Air is discharged normally. In order to quickly clean the dust in the smoke box, the bottom of the transition part is provided with a bottom dust cleaning door 14, and the two sides of the connecting part are provided with side dust cleaning doors 15, which are fixed by hand-tightening bolts. Or adjust the structure of the smoke box 4, and directly connect the furnace body 2 without setting the horizontal part.

On the basis of the forward and reverse combustion combined coal-fired stoves provided by the above-mentioned specific embodiments, in order to improve the heat exchange effect, the smoke box 4 is provided with a heat exchange pipe 17 that communicates with the water jacket interlayer. The number of hot water exchange pipes 17 can be increased. The plurality of hot water exchange pipes 17 in the connecting portion extend from front to back and are inclined upward, and the plurality of hot water exchange pipes 17 in the transition portion extend laterally, that is, the extension of the hot water exchange pipes 17 in the two parts. The directions are perpendicular to each other, which effectively improves the contact with the high temperature flue gas. Further, the partition plate 5 is provided with a water tank connected to the water jacket interlayer, so as to increase the heating of the heating water in the furnace.

An explosion-proof valve 18 that communicates with the water jacket interlayer can also be provided at the connection part to improve the safety of the furnace.

The coal-fired stove combined with forward and reverse combustion provided by the present utility model has been introduced in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present utility model, some improvements and modifications can also be made to the present utility model, and these improvements and modifications also fall into the protection of the claims of the present utility model. within the range.

Claims (10)

1. A coal-fired stove combined with forward and reverse combustion, comprising a base (1) and a furnace body (2) installed above the base (1), between the base (1) and the furnace body (2); A grate (3) is arranged between the furnace body (2), a smoke box (4) is connected to the rear of the furnace body (2), and it is characterized in that a vertical partition plate for separating the interior space is arranged inside the furnace body (2). (5), forming a front pyrolysis chamber (6) and a rear cooking fire channel (7), the upper end of the partition plate (5) is connected to the furnace body (2), and the partition plate (5) Between the lower end of the fire grate (3) and the grate (3), there is a gap connecting the pyrolysis chamber (6) and the cooking fire channel (7) and used for the passage of semi-cokes, above the pyrolysis chamber (6) A coal feeding port is provided, and a coal feeding door (8) is provided, and a cooking port (9) is provided above the cooking fire channel (7). 2 . The combined forward and reverse combustion coal-fired stove according to claim 1 , wherein the furnace body ( 2 ) and the outer shell of the smoke box ( 4 ) comprise an inner tank ( 10 ) and an outer shell spaced apart from each other. 3 . A bladder (11), a water jacket interlayer is formed between the inner bladder (10) and the outer bladder (11), and the upper part of the smoke box (4) is provided with a water outlet (12) that communicates with the water jacket sandwich The lower part of the furnace body (2) is provided with a water return port (13) that communicates with the water jacket interlayer. 3 . The coal-fired stove combined with forward and reverse combustion according to claim 2 , wherein the smoke box ( 4 ) comprises a vertical connecting part and a horizontal transition part, and one end of the transition part communicates with the In the upper part of the cooking fire channel (7), the other end of the transition part communicates with the lower end of the connection part, the upper end of the connection part communicates with the chimney, and the bottom of the transition part is provided with a bottom ash cleaning door (14), so Side ash cleaning doors (15) are arranged on both sides of the connecting portion. 4 . The coal-fired stove combining forward and reverse combustion according to claim 3 , wherein the volume of the pyrolysis chamber ( 6 ) is larger than the volume of the cooking fire channel ( 7 ). 5 . 5 . The coal-fired stove combined with forward and reverse combustion according to claim 4 , wherein a drawable ash hopper ( 16 ) is installed in the base ( 1 ). 6 . 6 . The coal-fired stove combined with forward and reverse combustion according to claim 5 , characterized in that, a water tank communicating with the water jacket interlayer is provided in the partition plate ( 5 ). 7 . 7. The coal-fired stove combined with forward and reverse combustion according to claim 6, characterized in that, the cooking port (9) is arranged just above the cooking fire channel (7), and the coal feeding port is arranged at the The pyrolysis chamber (6) is obliquely above and close to the front end of the pyrolysis chamber (6). 8. The coal-fired stove combined with forward and reverse combustion according to any one of claims 3 to 7, wherein a hot water exchange pipe (17) communicating with the water jacket interlayer is provided in the smoke box (4) . 9 . The coal-fired stove combined with forward and reverse combustion according to claim 8 , characterized in that, the plurality of said hot water exchange pipes ( 17 ) in the connecting portion extend from front to rear and are inclined upward, and the transition The plurality of said hot water exchange pipes (17) in the interior extend laterally. 10. The coal-fired stove combined with forward and reverse combustion according to claim 9, characterized in that, the connection part is provided with an explosion-proof valve (18) communicating with the water jacket interlayer.

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