CN213713048U

CN213713048U - Fluidized bed furnace for heating primary air by using waste gas waste heat of fluidized bed

Info

Publication number: CN213713048U
Application number: CN202022691081.8U
Authority: CN
Inventors: 郑晨涛; 闫友静; 张海鹏; 董海鹏
Original assignee: Beixin Building Materials Shaanxi Co ltd
Current assignee: Beixin Building Materials Shaanxi Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-16
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses an use fluidized bed waste gas waste heat to heat fluidized bed furnace of wind, including the fluidized bed the air outlet of fluidized bed is provided with and is used for absorbing fluidized bed waste gas's heat just forms a hot-blast heat exchanger, the heat exchanger passes through the air-blower will a hot-blast transport in the heat exchanger extremely in the fluidized bed. The utility model discloses a set up the heat exchanger and absorb fluidized bed exhaust waste gas to on the ambient air who is in the heat exchanger inner chamber with the heat conversion of waste gas, will let in the ambient air through the heating to the fluidized bed again, thereby utilize the waste gas waste heat of fluidized bed, the waste of the energy that has significantly reduced.

Description

Fluidized bed furnace for heating primary air by using waste gas waste heat of fluidized bed

Technical Field

The utility model relates to a fluidized bed furnace technical field, concretely relates to use fluidized bed waste gas waste heat to heat fluidized bed furnace of wind.

Background

The fluidized bed furnace is a heat supply mode applied to gypsum board production, is a thermal device for continuously roasting solid particles under fluidization, and is characterized in that the solid particles are suspended in air flow, the contact area between a gas phase and a solid phase is large, the heat efficiency is high, the temperature is uniform, and the furnace temperature is easy to control. The combustion of the fluidized bed furnace is that the dense phase region which is stably fluidized heats the passing cold air, the volatile components and ash in the coal can be combusted in the rising process of the cold air, the primary air of the common fluidized bed furnace is all ambient air, and in order to enable the bed charge of the fluidized bed furnace to be fluidized, the required primary air quantity is far greater than the air quantity required by fuel combustion, so that the energy required by heating the cold air is higher, and the energy waste is caused.

In the prior art, the fluidized bed furnace generally by the fluidized bed, be used for providing the air-blower of primary air in the fluidized bed, and carry out the preheating device that heats to the primary air, because the volume of the primary air that provides is far greater than the volume of the primary air who realizes the loss, lead to the fluidized bed to discharge a large amount of waste gas that carries heat, but because contain sulphide, nitride in the waste gas, for avoiding its corrosion to equipment such as fluidized bed, the event can not carry out cyclic utilization to it, thereby lead to a large amount of waste gases that carry heat to discharge to the external world after handling, thereby caused a large amount of heat energy losses.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an use fluidized bed waste gas waste heat heating primary air's fluidized bed to solve among the prior art because can not directly carry out cyclic utilization to carrying thermal waste gas, lead to carrying thermal waste gas in a large number and be arranged to the external world, thereby caused a large amount of heat energy loss's technical problem.

In order to solve the above technical problem, the utility model particularly provides the following technical scheme:

a fluidized bed furnace for heating primary air by using waste heat of fluidized bed waste gas comprises a fluidized bed, wherein a heat exchanger for absorbing heat of the waste gas of the fluidized bed and forming primary hot air is arranged at an air outlet of the fluidized bed, and the primary hot air in the heat exchanger is conveyed into the fluidized bed by the heat exchanger through an air blower;

the heat exchanger include one end connect in the first passageway of the air outlet of fluidized bed, the other end of first passageway is provided with the heat preservation cavity, first passageway is through transversely seting up in honeycomb passageway array in the heat preservation cavity is connected with the fifth passageway be provided with on the fifth passageway and be used for driving waste gas transverse motion and pass through in proper order first passageway honeycomb passageway array the draught fan of fifth passageway, the inner wall of heat preservation cavity with be provided with between the honeycomb passageway array and be used for making the vertical process of outside air the heat preservation cavity carries out the heating intermediate layer that heats with outside air.

As an optimized scheme of the utility model, the inner wall of heat preservation cavity through foraminiferous structural slab with honeycomb passageway array fixed connection, fifth passageway and first passageway all through the multi-ported tube with honeycomb passageway array end connection.

As a preferred scheme of the utility model, the vertical one end of heating intermediate layer is provided with the air inlet end, the vertical other end of heating intermediate layer is provided with the air-out end, the air-out end pass through the second channel connect in the air intake of air-blower, the air outlet of air-blower pass through the third channel connect in the air intake of fluidized bed.

As an optimal scheme of the utility model, the interior waste gas of air-out pipe of draught fan discharges to the external world through SOx/NOx control subassembly.

As the utility model discloses a preferred scheme, SOx/NOx control subassembly include one end connect in the fourth passageway of the air outlet of draught fan, the other end of fourth passageway is connected with snakelike process chamber a plurality of arc of snakelike process chamber bottom are held in turn to be filled with and are used for absorbing the first chemical solution that contains sulfur compound and be used for absorbing the second chemical solution that contains the nitro-compound all install the cassette in a plurality of arc on snakelike process chamber top.

Compared with the prior art, the utility model following beneficial effect has:

the utility model discloses a set up the heat exchanger and absorb fluidized bed exhaust waste gas to on the ambient air who is in the heat exchanger inner chamber with the heat conversion of waste gas, will let in the ambient air through the heating to the fluidized bed again, thereby utilize the waste gas waste heat of fluidized bed, the waste of the energy that has significantly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

Fig. 1 is a schematic structural diagram of the whole in the embodiment of the present invention;

fig. 2 is a side view of a heat exchanger according to an embodiment of the present invention;

fig. 3 is the embodiment of the utility model provides an in the embodiment structural schematic diagram of SOx/NOx control subassembly.

The reference numerals in the drawings denote the following, respectively:

1-a fluidized bed; 2-a heat exchanger; 3-a blower; 4-a draught fan; 5-a desulfurization and denitrification component;

21-a first channel; 22-a heat preservation cavity; 23-heating the interlayer; 24-an air inlet end; 25-air outlet end; 26-a second channel; 27-a fifth channel; 29-perforated structural plates; 210-honeycomb channel array; 211-multiway tubes;

51-a fourth channel; 52-serpentine treatment chamber; 53-first chemical solution; 54-a second chemical solution; 55-filter sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the utility model provides a fluidized bed waste gas waste heat heating primary air fluidized bed furnace, which comprises a fluidized bed 1, wherein a heat exchanger 2 for absorbing heat of waste gas of the fluidized bed 1 and forming primary hot air is arranged at an air outlet of the fluidized bed 1, and the primary hot air in the heat exchanger 2 is conveyed into the fluidized bed 1 by the heat exchanger 2 through an air blower 3; heat exchanger 2 include one end connect in the first passageway 21 of the air outlet of fluidized bed 1, the other end of first passageway 21 is provided with heat preservation cavity 22, first passageway 21 is through transversely seting up in honeycomb passageway array 210 in the heat preservation cavity 22 is connected with fifth passageway 28 be provided with on the fifth passageway 28 and be used for driving waste gas transverse motion and pass through in proper order first passageway 21 honeycomb passageway array 210 the draught fan 4 of fifth passageway 28, heat preservation cavity 22's inner wall with be provided with between the honeycomb passageway array 210 and be used for making the external air vertically pass through heat preservation cavity 22 carries out the heating intermediate layer 23 that heats with the external air.

The inner wall of the thermal insulation cavity 22 is fixedly connected with the honeycomb channel array 210 through a perforated structural plate 29, and the fifth channel 28 and the first channel 21 are both connected with the end of the honeycomb channel array 210 through a multi-way pipe 211. An air inlet end 24 is arranged at one longitudinal end of the heating interlayer 23, an air outlet end 25 is arranged at the other longitudinal end of the heating interlayer 23, the air outlet end 25 is connected to an air inlet of the air blower 3 through a second channel 26, and an air outlet of the air blower 3 is connected to an air inlet of the fluidized bed 1 through a third channel 27. And the waste gas in the air outlet pipe of the draught fan 4 is discharged to the outside through the desulfurization and denitrification assembly 5.

The utility model discloses a set up heat exchanger 2 and absorb fluidized bed exhaust waste gas to on the ambient air who is in the heat exchanger inner chamber with the heat conversion of waste gas, let in the ambient air through the heating to the fluidized bed again, thereby utilize the waste gas waste heat of fluidized bed, the waste of the energy that has significantly reduced.

The honeycomb channel array 210 is composed of a plurality of regular hexagonal channels connected to the insulating chamber 22 through the perforated structural plate 29, and the perforated structural plate 29 is perforated therethrough to allow air to normally pass through the perforated structural plate 29, so that the air can freely flow in the heating sandwich 23 to be heated, for the overall rigidity and strength of the structure of the honeycomb channel array 210.

As shown in fig. 3, the desulfurization and denitrification assembly 5 comprises a fourth channel 51 with one end connected to the air outlet of the induced draft fan 4, the other end of the fourth channel 51 is connected with a snake-shaped treatment cavity 52, a plurality of arc-shaped ends at the bottom end of the snake-shaped treatment cavity 52 are alternately filled with a first chemical solution 53 for absorbing sulfur-containing compounds and a second chemical solution 54 for absorbing nitrogen-containing compounds, and a plurality of arc-shaped ends at the top end of the snake-shaped treatment cavity 52 are internally provided with filter sheets 55.

By having the curved end of the serpentine-shaped treatment chamber 52, a plurality of spaces for holding the solution can be formed, so that the exhaust gas can be treated with the chemical solution alternately and a plurality of times, and the treatment effect can be enhanced by increasing the number of times of treatment.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.

Claims

1. The utility model provides an use fluidized bed waste gas waste heat to heat up fluidized bed furnace of wind, includes fluidized bed (1), its characterized in that: a heat exchanger (2) for absorbing heat of waste gas of the fluidized bed (1) and forming primary hot air is arranged at an air outlet of the fluidized bed (1), and the primary hot air in the heat exchanger (2) is conveyed into the fluidized bed (1) by the heat exchanger (2) through a blower (3);

heat exchanger (2) include one end connect in the first passageway (21) of the air outlet of fluidized bed (1), the other end of first passageway (21) is provided with heat preservation cavity (22), first passageway (21) are seted up through transversely the honeycomb passageway array (210) in heat preservation cavity (22) are connected with fifth passageway (28) be provided with on fifth passageway (28) and be used for driving waste gas transverse motion and pass through in proper order first passageway (21), honeycomb passageway array (210) the draught fan (4) of fifth passageway (28), the inner wall of heat preservation cavity (22) with be provided with between honeycomb passageway array (210) and be used for making the external air vertically pass through heat preservation cavity (22) are with heating intermediate layer (23) that carry out the heating to the external air.

2. The fluidized bed furnace for heating the primary air by using the waste heat of the waste gas of the fluidized bed according to claim 1, wherein: the inner wall of the heat preservation cavity (22) is fixedly connected with the honeycomb-shaped channel array (210) through a perforated structural plate (29), and the fifth channel (28) and the first channel (21) are connected with the end part of the honeycomb-shaped channel array (210) through multi-pass tubes (211).

3. The fluidized bed furnace for heating the primary air by using the waste heat of the waste gas of the fluidized bed according to claim 1, wherein: an air inlet end (24) is arranged at one longitudinal end of the heating interlayer (23), an air outlet end (25) is arranged at the other longitudinal end of the heating interlayer (23), the air outlet end (25) is connected to an air inlet of the air blower (3) through a second channel (26), and an air outlet of the air blower (3) is connected to an air inlet of the fluidized bed (1) through a third channel (27).

4. The fluidized bed furnace for heating the primary air by using the waste heat of the waste gas of the fluidized bed as claimed in claim 2, wherein: and waste gas in an air outlet pipe of the draught fan (4) is discharged to the outside through the desulfurization and denitrification assembly (5).

5. The fluidized bed furnace for heating the primary air by using the waste heat of the waste gas of the fluidized bed as claimed in claim 4, wherein: desulfurization and denitrification subassembly (5) include one end connect in the fourth passageway (51) of the air outlet of draught fan (4), the other end of fourth passageway (51) is connected with snakelike process chamber (52) a plurality of arc of snakelike process chamber (52) bottom are held in the interior alternate packing and are used for absorbing first chemical solution (53) that contain sulphur compound and are used for absorbing second chemical solution (54) that contain the nitro compound filter disc (55) are all installed in a plurality of arc on snakelike process chamber (52) top.