CN111349474A - Novel membrane wall circulating fluidized bed gasification furnace - Google Patents

Abstract

The invention relates to the technical field of gasification furnaces, and discloses a novel membrane type wall circulating fluidized bed gasification furnace which comprises a lining casting material, a lower collection tank, a membrane type wall, an upper collection tank, a downcomer, an ascending pipe, a water collection tank, a gasification furnace body, a support, a connecting bent pipe, a lower ring pipe, an upper ring pipe and a gasification furnace inner cavity. The invention recycles the heat emitted to the air by reducing the temperature of the outer wall surface of the gasification furnace body, and hot water is directly introduced into the subsequent steam boiler, thereby greatly improving the yield of steam, avoiding the waste of heat energy resources and the possible heat pollution, improving the utilization rate of coal and the total heat efficiency of the gasification furnace, reducing the operation cost and reducing the pollution to the environment.

Description

Novel membrane wall circulating fluidized bed gasification furnace

Technical Field

The invention relates to the technical field of gasification furnaces, in particular to a novel membrane wall circulating fluidized bed gasification furnace.

Background

Gasification is an important means for clean utilization of organic wastes such as coal, biomass, garbage, sludge and the like, and is widely applied to the fields of chemical industry, metallurgy, civil use, industrial gas and the like. The performance of the gasification technology directly influences the healthy development of the industries, plays a significant role in energy conservation and emission reduction control, and is an important guarantee for realizing related control targets of the country. The coal gasification technology has been developed for hundreds of years, the gasification technology of organic wastes such as biomass and the like is rapidly developed from the last 80 century, and the circulating fluidized bed gasification furnace is an efficient and low-pollution energy-saving product. Since the advent, the method has rapidly popularized and developed at home and abroad.

At present, a hearth of a circulating fluidized bed gasification furnace mostly adopts a furnace wall consisting of wear-resistant, fire-resistant and heat-insulating castable, and in the normal operation process, the external temperature of the furnace wall after heat insulation can reach 50-60 ℃, so that part of heat is dissipated into the air, waste is caused, and the utilization rate of coal is reduced. The invention aims to provide a method for recycling part of heat, and improving the utilization rate of coal and the total heat efficiency of a gasification furnace, so that a novel film-wall circulating fluidized bed gasification furnace is provided.

Disclosure of Invention

The invention aims to provide a novel membrane wall circulating fluidized bed gasification furnace, which achieves the purposes of improving the utilization rate of coal and the total thermal efficiency of the gasification furnace.

In order to achieve the purpose, the invention provides the following technical scheme: a novel membrane wall circulating fluidized bed gasification furnace comprises a lining casting material, a lower collection box, a membrane wall, an upper collection box, a downcomer, an ascending pipe, a water collection box, a gasification furnace body, a support, a connecting elbow, a lower ring pipe, an upper ring pipe and a gasification furnace inner cavity, wherein the lining casting material is annularly arranged inside the gasification furnace body, the gasification furnace inner cavity is positioned inside the lining casting material, the water collection box is arranged on one side of the top of the gasification furnace body, the support is fixedly connected with the bottom of the water collection box, the connecting elbow is arranged at a central shaft at the bottom of the water collection box, the ascending pipe is connected with one side of the bottom of the connecting elbow, the downcomer is connected with the other side of the bottom of the connecting elbow, the upper ring pipe is annularly connected with the top of the outer surface of the gasification furnace body, the upper collection box is connected with, the lower collection box is connected to the outer side of the lower ring pipe in an annular mode, the membrane type wall is arranged inside the lining casting material in an annular mode, the top of the membrane type wall is communicated with the upper collection box, and the bottom of the membrane type wall is communicated with the lower collection box.

Preferably, the gasifier body is arranged in a cylinder shape, and the inner cavity of the gasifier is arranged in a cylinder shape.

Preferably, the lining casting material is a granular or powdery material consisting of refractory aggregate, powder, a bonding agent, an additive, water or other liquid materials.

Preferably, the top of header tank one side is provided with the inlet tube, header tank one side bottom is provided with the outlet pipe, the inlet tube all is located the same one side of header tank with the outlet pipe, all be provided with the ooff valve on connecting bend, inlet tube and the outlet pipe.

Preferably, the connecting bent pipe is arranged in an inverted Y shape.

Preferably, the upper ring pipe and the lower ring pipe are symmetrically arranged in the middle of the gasification furnace body, and the upper ring pipe and the lower ring pipe are both arranged in a circular ring shape.

Preferably, the bottom of the ascending pipe is communicated with an upper header, and the bottom of the descending pipe is communicated with a lower header.

The invention provides a novel membrane wall circulating fluidized bed gasification furnace. The method has the following beneficial effects:

(1) the invention recycles the heat emitted to the air by reducing the temperature of the outer wall surface of the gasification furnace body, and hot water is directly introduced into the subsequent steam boiler, thereby greatly improving the yield of steam, avoiding the waste of heat energy resources and the possible heat pollution, improving the utilization rate of coal and the total heat efficiency of the gasification furnace, reducing the operation cost and reducing the pollution to the environment.

(2) The invention reduces the number of heat preservation layers and the heat preservation thickness of the traditional gasification furnace, reduces the weight and the volume of equipment, reduces the equipment investment, improves the overall energy efficiency, saves a large amount of economic cost, and connects the ascending pipe and the descending pipe by arranging the connecting bent pipe, so that the heated water can enter the water collecting tank again through microcirculation, thereby being capable of utilizing the hot water subsequently.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side view of the header tank of the present invention;

FIG. 3 is an enlarged view of the present invention A.

In the figure: 1 lining casting material, 2 lower header, 3 membrane type walls, 4 upper header, 5 down pipes, 6 ascending pipes, 7 water collecting tanks, 8 gasification furnace body, 9 support, 10 connecting bent pipes, 11 lower ring pipes, 12 upper ring pipes and 13 gasification furnace inner cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-3, the present invention provides a technical solution: a novel membrane wall circulating fluidized bed gasification furnace comprises a lining casting material 1, alower collecting box 2, amembrane wall 3, anupper collecting box 4, a downcomer 5, an ascendingpipe 6, awater collecting box 7, a gasification furnace body 8, a support 9, a connectingelbow 10, alower ring pipe 11, anupper ring pipe 12 and a gasification furnaceinner cavity 13, wherein the lining casting material 1 is annularly arranged inside the gasification furnace body 8, the gasification furnace body 8 is cylindrically arranged, the gasification furnaceinner cavity 13 is cylindrically arranged, and the gasification furnaceinner cavity 13 is positioned inside the lining casting material 1. the invention recycles heat emitted to the air by reducing the temperature of the outer wall surface of the gasification furnace body 1, hot water is directly introduced into a subsequent steam boiler, thereby greatly improving the yield of steam, avoiding the waste of heat energy resources and possible heat pollution, improving the utilization rate of coal and the total heat efficiency of the gasification furnace, and reducing the operation cost, the environment pollution is reduced, the lining casting material 1 is granular and powdery materials consisting of refractory aggregate, powder, a bonding agent, an additive, water or other liquid materials, thelining casting material 4 is granular and powdery materials consisting of refractory aggregate, powder, a bonding agent, an additive, water or other liquid materials, the heat insulation of the gasifier body 1 is ensured, workers are prevented from being scalded, thewater collecting tank 7 is arranged on one side of the top of the gasifier body 8, a water inlet pipe is arranged on the top of one side of thewater collecting tank 7, a water outlet pipe is arranged on the bottom of one side of thewater collecting tank 7, the water inlet pipe and the water outlet pipe are both positioned on the same side of thewater collecting tank 7, switch valves are arranged on the connectingbent pipe 10, the connectingbent pipe 10 is arranged in an inverted Y shape, the support 9 is fixedly connected with the bottom of thewater collecting tank 7, the connectingbent pipe 10 is arranged at, the descending pipe 5 is connected with the other side of the bottom of the connectingbent pipe 10, theupper ring pipe 12 is annularly connected with the top of the outer surface of the gasification furnace body 8, theupper header 4 is connected with the outer side of theupper ring pipe 12, the ascendingpipe 6 is communicated with theupper header 4, the bottom of the descending pipe 5 is communicated with thelower header 2, thelower ring pipe 11 is annularly connected with the bottom of the outer surface of the gasification furnace body 8, the number of heat preservation layers and the heat preservation thickness of the traditional gasification furnace are reduced, the weight and the volume of equipment are reduced, the equipment investment is reduced, the overall energy efficiency is improved, a large amount of economic cost is saved, the ascendingpipe 10 is connected with the descendingpipe 11 by arranging the connectingbent pipe 7, the heated water can reenter the inside of the header 5 through microcirculation, thereby the subsequent hot water utilization can be realized, thelower header 2 is annularly connected with the outer, theupper ring pipe 12 and thelower ring pipe 11 are both arranged in a circular ring shape, themembrane type wall 3 is arranged inside the lining casting material 1 in a circular shape, the top of themembrane type wall 3 is communicated with theupper header 4, and the bottom of themembrane type wall 3 is communicated with thelower header 2.

When the steam boiler is used, cold water in the water collectingtank 7 enters thelower collecting tank 2 along the descending pipe 5, thelower collecting tank 2 is connected with theupper collecting tank 4 through themembrane wall 3, themembrane wall 3 and heat emitted after heat preservation of the inner cavity 8 of the gasification furnace perform heat exchange to increase the water temperature, the water after temperature rise enters the water collectingtank 7 again along the ascendingpipe 6 through micro circulation, so that the water temperature in the water collectingtank 7 is heated, and the water after temperature rise flows out of the water collectingtank 7 along the water outlet pipe and then enters the steam boiler in the subsequent process flow.

In conclusion, the invention recycles the heat emitted to the air by reducing the temperature of the outer wall surface of the gasifier body 8, and hot water is directly introduced into the subsequent steam boiler, thereby greatly improving the steam yield, avoiding the waste of heat energy resources and the possible heat pollution, improving the utilization rate of coal and the total heat efficiency of the gasifier, reducing the operation cost and reducing the pollution to the environment, reducing the heat preservation layer number and the heat preservation thickness of the traditional gasifier, reducing the weight and the volume of equipment, reducing the equipment investment, improving the overall energy efficiency, saving a large amount of economic cost, and connecting theascending pipe 6 and the descending pipe 5 by arranging the connectingbent pipe 10, so that the heated water can enter thewater collection tank 7 again through microcirculation, thereby being capable of utilizing the hot water subsequently.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a novel diaphragm type wall circulating fluidized bed gasifier, includes inside lining castables (1), lower header (2), diaphragm type wall (3), goes up header (4), downcomer (5), riser (6), header tank (7), gasifier body (8), support (9), connecting elbow (10), lower ring pipe (11), last ring pipe (12), gasifier inner chamber (13), its characterized in that: the lining castable (1) is annularly arranged inside the gasifier body (8), the gasifier inner cavity (13) is positioned inside the lining castable (1), the water collecting tank (7) is arranged on one side of the top of the gasifier body (8), the support (9) is fixedly connected with the bottom of the water collecting tank (7), the connecting bent pipe (10) is arranged at the center shaft of the bottom of the water collecting tank (7), the ascending pipe (6) is connected with one side of the bottom of the connecting bent pipe (10), the descending pipe (5) is connected with the other side of the bottom of the connecting bent pipe (10), the upper ring pipe (12) is annularly connected with the top of the outer surface of the gasifier body (8), the upper collecting tank (4) is connected with the outer side of the upper ring pipe (12), the ascending pipe (6) is communicated with the upper collecting tank (4), and the lower ring pipe (11) is annularly connected with the bottom of the outer surface, the lower header (2) is annularly connected to the outer side of the lower ring pipe (11), the membrane type wall (3) is annularly arranged inside the lining casting material (1), the top of the membrane type wall (3) is communicated with the upper header (4), and the bottom of the membrane type wall (3) is communicated with the lower header (2).

2. The novel membrane-wall circulating fluidized-bed gasification furnace according to claim 1, wherein: the gasification furnace body (8) is arranged in a cylindrical mode, and the inner cavity (13) of the gasification furnace is arranged in a cylindrical mode.

3. The novel membrane-wall circulating fluidized-bed gasification furnace according to claim 1, wherein: the lining casting material (1) is a granular or powdery material consisting of refractory aggregate, powder, a bonding agent, an additive, water or other liquid materials.

4. The novel membrane-wall circulating fluidized-bed gasification furnace according to claim 1, wherein: the water collecting tank is characterized in that a water inlet pipe is arranged at the top of one side of the water collecting tank (7), a water outlet pipe is arranged at the bottom of one side of the water collecting tank (7), the water inlet pipe and the water outlet pipe are located on the same side of the water collecting tank (7), and switch valves are arranged on the connecting bent pipe (10), the water inlet pipe and the water outlet pipe.

5. The novel membrane-wall circulating fluidized-bed gasification furnace according to claim 1, wherein: the connecting bent pipe (10) is arranged in an inverted Y shape.

6. The novel membrane-wall circulating fluidized-bed gasification furnace according to claim 1, wherein: the upper ring pipe (12) and the lower ring pipe (11) are symmetrically arranged in the middle of the gasification furnace body (8), and the upper ring pipe (12) and the lower ring pipe (11) are both arranged in a circular ring shape.

7. The novel membrane-wall circulating fluidized-bed gasification furnace according to claim 1, wherein: the bottom of the ascending pipe (6) is communicated with the upper header (4), and the bottom of the descending pipe (5) is communicated with the lower header (2).

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