CN217356864U

CN217356864U - Biomass full-gasification boiler and anti-corrosion hearth structure

Info

Publication number: CN217356864U
Application number: CN202220908395.5U
Authority: CN
Inventors: 曹希新; 刘红斌; 娄经松; 刘新龙; 邹友民
Original assignee: Hunan Chang Hong Boiler Technology Co ltd
Current assignee: Hunan Chang Hong Boiler Technology Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-09-02
Anticipated expiration: 2032-04-20

Abstract

Biomass full gasification boiler and anticorrosive furnace structure relate to boiler technical field. The anti-corrosion hearth structure comprises a front hearth and a rear hearth of a full-film type wall structure, film type wall pipes are arranged on other wall surfaces of the front hearth except the bottom of the front hearth, a tar tray is arranged at the bottom of the front hearth, and the tar tray is poured and fixed on the bottom of the front hearth through a refractory pouring material. Above-mentioned scheme changes preceding furnace into semi-enclosed construction by full membrane type wall structure, with preceding furnace bottom diaphragm type wall pipe cancellation, can avoid mixtures such as tar to cause the corruption to preceding furnace diaphragm type wall pipe, prevents that the diaphragm type wall perforation from revealing, extension boiler life to at preceding furnace bottom installation tar tray, and with the pouring of refractory castable, it is whole sealed, can prevent that the flue gas from revealing, tar can be in secondary schizolysis burning under the high temperature effect after deposiing in furnace bottom tar tray simultaneously.

Description

Biomass full-gasification boiler and anti-corrosion hearth structure

Technical Field

The utility model relates to a boiler technical field especially relates to a living beings gasification boiler and anticorrosive furnace structure entirely.

Background

The biomass full gasification boiler is a novel energy-saving device. The device takes cheap biomass with wide sources as fuel, biomass is firstly gasified to be converted into combustible gas, and then the biomass gas is combusted to generate hot water or steam. Compared with oil-fired, electricity-fired and gas-fired boilers, the biomass full-gasification boiler can save 30-60% of operation cost, and is widely applied to various power plants, chemical industry, smelting and other industries. However, the biomass raw material is gasified and cracked in a gasification furnace under normal temperature conditions, and a large amount of combustible gas of CO, H2 and CH4 and a small amount of mixture of water vapor, wood vinegar, tar and the like are generated in the gasification process. In the mixture such as tar can enter into furnace along with the combustor, partly can be cracked into permanent gas under the high temperature effect, is utilized with the combustible gas together, another part meets and forms fluid thing after preceding furnace diaphragm type wall cooling, and this fluid thing has very strong corrosivity, and fluid thing long-term adhesion is on preceding furnace diaphragm type wall pipe bottom, can seriously corrode the diaphragm type wall pipe, causes the diaphragm type wall perforation to reveal, shortens boiler life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anticorrosive furnace structure of living beings full gasification boiler changes boiler front furnace into semi-enclosed construction by full membrane formula wall structure, with front furnace bottom diaphragm type wall pipe cancellation, avoids mixtures such as tar to cause the corruption to front furnace diaphragm type wall pipe.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the biomass full-gasification boiler anti-corrosion hearth structure comprises a front hearth and a rear hearth of a full-film wall structure, wherein film-type wall pipes are arranged on other wall surfaces of the front hearth except the bottom of the front hearth, a tar tray is arranged at the bottom of the front hearth, and the tar tray is poured and fixed on the bottom of the front hearth through a refractory pouring material.

Preferably, a fire-resistant layer poured by fire-resistant pouring materials is paved on the heating surface of the combustion zone of the front hearth.

More preferably, the refractory layer has a thickness of 50-80 mm.

The utility model discloses a second purpose provides a living beings gasification boiler entirely, can improve the life of boiler to energy-concerving and environment-protective.

In order to achieve the above purpose, the utility model adopts the following technical scheme: biomass full gasification boiler is including adopting the furnace of above-mentioned biomass full gasification boiler anticorrosive furnace structure.

Preferably, the biomass full-gasification boiler comprises an upper drum, a lower drum, a descending pipe and a right lower collecting box, the upper drum is connected with the right lower collecting box through a membrane wall pipe, the lower drum is connected with the right lower collecting box through the descending pipe, a convection pipe bundle for connecting the upper drum and the lower drum is arranged between the upper drum and the lower drum, and the upper drum and the lower drum are horizontally arranged and are respectively arranged at the upper end and the lower end of one side of the hearth.

More preferably, the downcomer includes a front section inclined to the horizontal direction and a rear section parallel to the horizontal direction, and an included angle between the front section and the rear section is 90-180 degrees, and the lower drum, the front section of the downcomer, the rear section of the downcomer, and the lower right header are connected in sequence.

More preferably, the membrane wall pipe comprises an upper section inclined to the horizontal direction and a lower section perpendicular to the horizontal direction, an included angle between the upper section and the lower section is 90-180 degrees, and the upper drum, the upper section of the membrane wall pipe, the lower section of the membrane wall pipe and the right lower header are sequentially connected.

Among the anticorrosive furnace structure of above-mentioned living beings full gasification boiler, boiler front hearth changes semi-enclosed construction into by full membrane wall structure, front hearth bottom diaphragm type wall pipe cancellation, can avoid mixtures such as tar to cause the corruption to front hearth diaphragm type wall pipe, prevent that the diaphragm type wall perforation from revealing, extension boiler life, and at front hearth bottom installation tar tray, and pour with refractory castable, it is whole sealed, can prevent that the flue gas from revealing, tar can be in secondary schizolysis burning under the high temperature effect after deposiing in furnace bottom tar tray simultaneously.

Drawings

FIG. 1 is a front view of a biomass full gasification boiler in an embodiment;

FIG. 2 is a schematic cross-sectional view taken in the direction A-A of FIG. 1, with the after hearth membrane wall omitted;

FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a right side view of the biomass complete gasification boiler in the embodiment.

In the figure:

1-hearth 1 a-front hearth 1 b-rear hearth

2-membrane wall pipe 2 a-membrane wall pipe upper section 2 b-membrane wall pipe lower section

3-tar tray 4-fire-resistant layer 5-upper pot

6-lower drum 7-down pipe 7 a-down pipe front section

7 b-the downcomer back section 8-the right lower header 9-the convection bank.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 2-3, the anticorrosion hearth structure of the biomass full-gasification boiler comprises a front hearth 1a and a rear hearth 1b of a full-film type wall structure, the front hearth 1a is provided with film type wall pipes 2 on the other wall surfaces except the bottom of the front hearth, the bottom of the front hearth 1a is provided with a tar tray 3, and the tar tray 3 is cast and fixed on the bottom of the front hearth 1a by refractory pouring materials.

Among the anticorrosive furnace structure of above-mentioned full gasification boiler of living beings, furnace front hearth 1a changes half enclosed construction into by full membrane formula wall structure, front hearth 1a bottom membrane type wall pipe cancellation, can avoid mixtures such as tar to lead to the fact the corruption to front hearth 1a membrane type wall pipe, prevent that the membrane type wall from perforating and revealing, extension boiler life, and at front hearth 1a bottom installation tar tray 3, and pour with refractory castable, it is whole sealed, can prevent that the flue gas from revealing, tar deposits the back in furnace 1 bottom tar tray 3 simultaneously under the high temperature effect secondary pyrolysis burning.

In this embodiment, the combustion zone heating surface of the front hearth 1a is coated with a refractory layer 4 cast from a refractory casting material, see fig. 2. Thin refractory pouring materials are paved on the heating surfaces around the combustion area of the front hearth 1a, so that the temperature of the combustion area can be effectively improved, the secondary cracking combustion of mixtures such as tar is facilitated, the content of tar can be reduced, the energy in the tar is utilized, the fuel gas heat value is improved, the heat efficiency of a boiler can be effectively improved, meanwhile, the fuel can be fully combusted, the emission of atmospheric pollutants can be reduced, and the energy-saving environment-friendly boiler is energy-saving. Wherein the thickness of the refractory layer 4 may be 50-80 mm.

It should be noted that, because a large amount of mixtures such as water vapor, pyroligneous acid, tar and the like are generated in the gasification process of biomass and are brought into the hearth 1 along with the burner, the mixtures form fluid substances after being cooled by the metal pipe wall, and the fluid substances are highly corrosive to metal after being contacted for a long time, the biomass full-gasification boiler corrosion-resistant hearth structure provided by the embodiment improves the front hearth 1a, cancels the membrane wall pipe 2 at the bottom of the front hearth 1a, so as to prevent the membrane wall from being corroded to influence the service life, and then keeps the consistency of the rear hearth 1b and the traditional hearth structure. Wherein, because the fire-resistant layer 4 with the thickness of 50-80mm is arranged at the periphery of the improved front hearth 1a, when the combustor burns, the fire-resistant layer 4 is heated and burnt red, and the water vapor in the biomass can be evaporated, so that the tar is blocky and burns. In addition, because the membrane wall pipe 2 is not arranged at the bottom of the improved front hearth 1a, when the moisture content caused by biomass gas is too high under extreme conditions, the biomass gas may permeate into the refractory layer at the lowest part of the front hearth 1a, but the membrane wall pipe 2 cannot be corroded, so that the service life of the boiler can be prolonged.

The embodiment also provides a biomass full-gasification boiler, which comprises a hearth 1 adopting the above biomass full-gasification boiler anti-corrosion hearth structure, wherein the hearth 1 comprises the front hearth 1a and the rear hearth 1b, so that the service life of the boiler can be prolonged, energy is saved, environment is protected, and meanwhile, potential safety hazards can be reduced and the maintenance cost can be reduced.

In this embodiment, as shown in fig. 1 to 4, the biomass complete gasification boiler includes an upper drum 5, a lower drum 6, a downcomer 7 and a right lower header 8, the upper drum 5 and the right lower header 8 are connected by a membrane wall pipe 2, the lower drum 6 and the right lower header 8 are connected by the downcomer 7, and a convection bank 9 connecting the upper drum 5 and the lower drum 6 is provided therebetween. Wherein, the upper boiler barrel 5 and the lower boiler barrel 6 are both horizontally arranged and are respectively arranged at the upper end and the lower end of one side of the hearth 1.

In this embodiment, the downcomer 7 comprises a front section 7a inclined to the horizontal direction and a rear section 7b parallel to the horizontal direction, and the included angle between the front section 7a and the rear section 7b is 90-180 degrees, and the lower drum 6, the front section 7a of the downcomer, the rear section 7b of the downcomer and the right lower header 8 are connected in sequence, as shown in fig. 2. Wherein, the included angle between the front section 7a of the downcomer and the horizontal direction is 20 degrees.

In this embodiment, the membrane wall pipe 2 includes an upper section 2a inclined to the horizontal direction and a lower section 2b perpendicular to the horizontal direction, and an included angle between the upper section 2a and the lower section 2b is 90-180 degrees, and the upper drum 5, the upper section 2a of the membrane wall pipe, the lower section 2b of the membrane wall pipe, and the right lower header 8 are connected in sequence, as shown in fig. 2. Wherein, the included angle between the upper section 2a of the membrane wall pipe and the horizontal direction is 9.5 degrees.

In this embodiment, the furnace 1 may be provided with an access door for easy maintenance. Wherein, the number of the access doors can be a plurality and are respectively arranged on the front hearth 1a and the rear hearth 1 b.

It should be noted that the biomass full gasification boiler feed water is dropped from the low temperature section of the upper drum 5 to the lower drum 6 through the convection bank 9, and then is collected to the right lower header 8 through the down pipe 7, the membrane wall pipe 2 of the front furnace 1a covering the furnace 1 is a rising pipe, the steam-water mixture rises to the upper drum 5, and thus, the natural circulation of water can be established through the gravity difference of water. Because the bottom of the front hearth 1a is hollow, the mixture of tar and the like can not corrode the front hearth 1 a. For the tightness of the furnace 1, a tar tray 3 is mounted on the front furnace 1a and is cast with a refractory casting material.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed for the preferred embodiment, the present invention is not limited to the product form and the pattern, and any person skilled in the art can make some modifications or modifications to the equivalent embodiment of the equivalent variations without departing from the technical scope of the present invention, but all the contents of the technical solution of the present invention do not depart from the scope of the patent of the technical solution of the present invention.

Claims

1. Anticorrosive furnace structure of biomass full gasification boiler, its characterized in that: the rear hearth comprises a front hearth (1 a) and a rear hearth (1 b) of a full-film wall structure, wherein film-type wall tubes (2) are arranged on other wall surfaces of the front hearth (1 a) except the bottom of the front hearth, a tar tray (3) is arranged at the bottom of the front hearth (1 a), and the tar tray (3) is poured and fixed on the bottom of the front hearth (1 a) through a refractory pouring material.

2. The biomass full-gasification boiler anti-corrosion hearth structure according to claim 1, characterized in that: and a fire-resistant layer (4) poured by fire-resistant pouring materials is paved on the heating surface of the combustion zone of the front hearth (1 a).

3. The biomass full-gasification boiler anti-corrosion hearth structure according to claim 2, characterized in that: the thickness of the refractory layer (4) is 50-80 mm.

4. Biomass full gasification boiler, its characterized in that: the furnace (1) comprises the biomass full gasification boiler anticorrosion furnace structure as claimed in any one of claims 1 to 3.

5. The biomass full-gasification boiler of claim 4, wherein: including last drum (5), lower drum (6), downcomer (7) and right side collection box (8) down, go up drum (5) and right side collection box (8) down and link to each other through diaphragm type wall pipe (2), lower drum (6) link to each other through downcomer (7) with right side collection box (8) down, upward be provided with between drum (5) and lower drum (6) and connect convection bank (9) of the two, go up drum (5) and lower drum (6) and be horizontal formula horizontal and divide and establish the upper and lower extreme in furnace (1) one side.

6. The biomass full-gasification boiler of claim 5, wherein: the descending pipe (7) comprises a front section (7 a) inclined to the horizontal direction and a rear section (7 b) parallel to the horizontal direction, an included angle between the front section (7 a) and the rear section (7 b) is 90-180 degrees, and the lower boiler barrel (6), the front section (7 a) of the descending pipe, the rear section (7 b) of the descending pipe and the right lower header (8) are sequentially connected.

7. The biomass full-gasification boiler of claim 5, wherein: the diaphragm type wall pipe (2) comprises an upper section (2 a) inclined to the horizontal direction and a lower section (2 b) perpendicular to the horizontal direction, the included angle between the upper section (2 a) and the lower section (2 b) is 90-180 degrees, and the upper boiler barrel (5), the upper section (2 a) of the diaphragm type wall pipe, the lower section (2 b) of the diaphragm type wall pipe and the right lower header (8) are sequentially connected.