阅读说明：本技术 一种烟气换热器 (Flue gas heat exchanger ) 是由 何益先 刘德安 谢林 蒋枢廷 陈健康 徐瑜 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种烟气换热器,包括壳体、壳体侧面的进气口和出气口、壳体内的换热部件；所述换热部件包括：贯穿所述壳体的上表面和下表面的换热柱；圆周向设置在换热柱上的换热片；弧形设置在所述换热片上的导气片；设置在所述换热柱外侧,并从换热片底部贯穿所述换热片的抽气槽；设置在换热柱和换热片内部的换热物料流通通路。(The invention discloses a flue gas heat exchanger, which comprises a shell, an air inlet and an air outlet on the side surface of the shell, and a heat exchange component in the shell; the heat exchange part includes: a heat exchange column penetrating the upper and lower surfaces of the housing; the heat exchange fins are circumferentially arranged on the heat exchange column; the air guide plate is arranged on the heat exchange plate in an arc shape; the air extraction groove is arranged on the outer side of the heat exchange column and penetrates through the heat exchange plate from the bottom of the heat exchange plate; and the heat exchange material circulation passage is arranged inside the heat exchange column and the heat exchange plate.)

1. A kind of flue gas heat exchanger, characterized by: comprises a shell, an air inlet and an air outlet on the side surface of the shell, and a heat exchange component in the shell;

the heat exchange part includes:

a heat exchange column penetrating the upper and lower surfaces of the housing;

the heat exchange fins are circumferentially arranged on the heat exchange column;

the air guide plate is arranged on the heat exchange plate in an arc shape;

the air extraction groove is arranged on the outer side of the heat exchange column and penetrates through the heat exchange plate from the bottom of the heat exchange plate;

and the heat exchange material circulation passage is arranged inside the heat exchange column and the heat exchange plate.

2. The flue gas heat exchanger of claim 1, wherein: the heat exchange fins are arranged in a funnel shape.

3. The flue gas heat exchanger of claim 1, wherein: the bottom of the air suction groove penetrates through the shell.

4. The flue gas heat exchanger of claim 1, wherein: the air exhaust groove is provided with an air exhaust opening and a vent groove.

5. The flue gas heat exchanger of claim 4, wherein: and a filtering piece is arranged in the air exhaust groove.

6. The flue gas heat exchanger of claim 5, wherein: the filter member is a filter bag.

7. The flue gas heat exchanger of claim 1, wherein: the air inlet and the air outlet are oppositely arranged.

8. The flue gas heat exchanger of claim 7, wherein: the air inlet and the air outlet are obliquely arranged.

Technical Field

The invention relates to the field of heat exchange equipment, in particular to a flue gas heat exchanger.

Background

When the flue gas of the existing iron and steel enterprises is discharged, a flue gas heat exchanger is often needed to recover the waste heat of the flue gas. The flue gas waste heat recovery mainly converts the heat carried by the flue gas into the heat which can be utilized through a certain heat exchange mode, and the fuel is saved.

The existing flue gas heat exchanger adopts a heat exchange fin type heat exchange device when in use, and has two disadvantages when being applied to flue gas waste heat recovery, namely, the long-time use of the heat exchange fin can cause dust accumulation on the heat exchange fin to influence the heat exchange efficiency; secondly, the flow path of the inlet air and the outlet air is short, and the heat exchange effect is not ideal.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides the flue gas heat exchanger which can reduce the dust deposition on a heat exchange surface during heat exchange and can improve the heat exchange efficiency.

The invention firstly provides a flue gas heat exchanger, which comprises a shell, an air inlet and an air outlet on the side surface of the shell, and a heat exchange component in the shell;

the heat exchange part includes:

a heat exchange column penetrating the upper and lower surfaces of the housing;

the heat exchange fins are circumferentially arranged on the heat exchange column;

the air guide plate is arranged on the heat exchange plate in an arc shape;

the air extraction groove is arranged on the outer side of the heat exchange column and penetrates through the heat exchange plate from the bottom of the heat exchange plate;

and the heat exchange material circulation passage is arranged inside the heat exchange column and the heat exchange plate.

The housing is preferably arranged in a cylindrical or other circular arrangement, such as an oval, barrel, etc. The air inlet and the air outlet are arranged on the arc-shaped side face of the shell, the air inlet is preferably arranged at the top of the side face of the shell, and the air outlet is preferably arranged at the bottom of the side face of the shell. The heat exchange component is preferably arranged at the center of the shell and penetrates through the upper surface and the lower surface of the shell. The heat exchange column is arranged in a hollow mode and penetrates through the upper surface and the lower surface of the shell. The heat exchange fins are arranged on the outer side of the heat exchange column and are arranged in a circular shape. The interior of the heat exchange plate is also hollow and is communicated with the hollow part of the interior of the heat exchange column. The air guide sheet is arranged on the upper surface of the heat exchange sheet and is arranged in an arc shape and folded towards the circle center, namely the air guide sheet is connected with the circle center in an arc shape. The air exhaust groove is arranged in the middle of the heat exchange plate, is arranged at the periphery of the connection of the heat exchange plate and the heat exchange column and penetrates through the heat exchange plate, and extends along the axial direction of the heat exchange column. The hollow part for connecting the heat exchange fins and the heat exchange column is a heat exchange material circulation passage.

The invention also provides the following optimization scheme:

preferably, the heat exchange fins are arranged in a funnel shape. The heat exchange fins are arranged in a funnel type mode, wherein the outermost side of each heat exchange fin is the highest, and the innermost side of each heat exchange fin is the lowest.

Preferably, the bottom of the suction groove penetrates through the shell. The topmost part of the air extraction groove is arranged at the bottom of the heat exchange fin on the uppermost layer.

Preferably, the air exhaust groove is provided with an air exhaust opening and a vent groove. The air pumping opening of the air pumping groove is preferably arranged at the lowest position of the circle center of each heat exchange sheet.

Preferably, a filter member is arranged in the air exhaust groove. Preferably, the filter member is a filter bag. The filter element can also be selected from other filter devices, such as filter cotton, filter fiber, filter foam and the like.

Preferably, the air inlet and the air outlet are oppositely arranged. The air inlet and the air outlet are arranged on two sides of the shell relative to the shell.

More preferably, the air inlet and the air outlet are obliquely arranged. The oblique arrangement of the air inlet and the air outlet means that the air inlet and the air outlet are obliquely arranged between 0 and 90 along the horizontal direction of the side surface of the shell and at the point of intersection with the side surface of the shell.

The invention has the beneficial effects that:

1. the flue gas heat exchanger can quickly collect dust impurities in flue gas on the basis of the original heat exchanger, and realizes effective filtration and collection;

2. the flue gas heat exchanger guides the flue gas to spirally circulate in the flue gas heat exchanger in the flue gas heat exchange process, so that the heat exchange circulation time of the gas in the flue gas heat exchanger can be prolonged, and the flue gas heat exchange efficiency can be improved.

3. The air guide sheet of the flue gas heat exchanger can guide dust to be concentrated at the center of the heat exchange sheet and collect the dust into the air extraction groove through the air extraction groove.

Drawings

FIG. 1 is a front view of a flue gas heat exchanger according to a preferred embodiment of the present invention;

FIG. 2 is a perspective view of a flue gas heat exchanger according to a preferred embodiment of the present invention;

FIG. 3 is a front view of a heat exchange member according to a preferred embodiment of the present invention;

FIG. 4 is a perspective view of a heat exchange member according to a preferred embodiment of the present invention;

FIG. 5 is a perspective view of a heat exchange member according to a preferred embodiment of the present invention;

FIG. 6 is a front view of an evacuation cell in accordance with a preferred embodiment of the present invention;

FIG. 7 is a perspective view of an evacuation cell in accordance with a preferred embodiment of the present invention;

FIG. 8 is a perspective view of an evacuation cell in accordance with a preferred embodiment of the present invention;

the specific reference numerals are:

1, a shell; 2, an air inlet; 3, an air outlet; 4 a heat exchange component; 41 heat exchange columns; 42 heat exchange fins; 43 air-guiding sheet; 44 an air exhaust groove; 45 heat exchange material flow path; 441 air pumping hole; 442 a vent slot; 443 filter element.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.

As shown in fig. 1-8, the present invention firstly provides a flue gas heat exchanger, which comprises a shell 1, an air inlet 2 and an air outlet 3 on the side surface of the shell 1, and a heat exchange component 4 in the shell 1;

the heat exchange member 4 includes:

a heat exchange column 41 penetrating the upper and lower surfaces of the case 1;

heat exchange fins 42 circumferentially provided on the heat exchange column 41;

the air guide plate 43 is arranged on the heat exchange plate 42 in an arc shape;

an air extraction groove 44 which is arranged outside the heat exchange column 41 and penetrates the heat exchange plate 42 from the bottom of the heat exchange plate 42;

and a heat exchange material circulation path 45 provided inside the heat exchange column 41 and the heat exchange fins 42.

The housing 1 is preferably arranged in a cylindrical or other circular arrangement, such as an oval, barrel, etc. The cylindrical structure has the advantages that the smoke can be circumferentially fed along the inner side of the shell 1, so that the smoke can circumferentially flow in the shell 1, a centripetal force is generated, and dust impurities in the smoke can be collected towards the center of the shell 1 more easily.

The air inlet 2 and the air outlet 3 are arranged on the arc-shaped side surface of the shell 1, and preferably, the air inlet 2 is arranged at the top of the side surface of the shell 1, and the air outlet 3 is arranged at the bottom of the side surface of the shell 1. The advantage of setting up like this is that can make the route that the flue gas circulated in casing 1 lengthen, the time of extension heat transfer.

The heat exchange component 4 is preferably arranged at the center of the shell 1 and penetrates through the upper surface and the lower surface of the shell 1. The advantage that heat transfer part 4 set up in centre of a circle department is that not hinder comparatively clear gas and circulate in the outside, carries out the collection of dust in the more centre of a circle department of dust impurity, improves the collection effect of dust.

The heat exchange columns 41 are hollow, and the heat exchange columns 41 penetrate through the upper surface and the lower surface of the shell 1. The heat exchange fins 42 are arranged outside the heat exchange column 41 and are arranged in a circular shape. The heat exchanger plate 42 is also hollow inside and communicates with the hollow inside of the heat exchange column 41. The air guide plate 43 is arranged on the upper surface of the heat exchange plate 42 and is arranged in an arc shape converging towards the circle center, namely the air guide plate 43 is connected with the circle center towards the circumference arc shape. The gas guide sheet 43 plays a role in blocking dust, and guides gas to circulate, and the gas guide sheet 43 can guide the gas to circulate annularly at the center of a circle, block impurities in the gas, and slide toward the center of the circle under the pushing of the gas.

The air exhaust groove 44 is arranged in the middle of the heat exchange plate 42, is arranged at the connecting circumference of the heat exchange plate 42 and the heat exchange column 41 and penetrates through the heat exchange plate 42, and the air exhaust groove 44 extends along the axial direction of the heat exchange column 41. The air extracting groove 44 is arranged at the middle of the heat exchanging fin 42, the dust guided by the air guiding fin 43 slides to the air extracting groove 44 at the outer side of the heat exchanging column 41, and the bottom of the air extracting groove 44 is connected with an air extracting device, such as an air extracting pump. The suction box 44 draws the dust into the suction box 44.

The hollow part of the heat exchange plate 42 and the heat exchange column 41 is the heat exchange material flow passage 45. The heat exchange material circulation passage 45 is a sealed space, and is not communicated with the heat exchange groove, nor directly communicated with the gas circulation space inside the shell.

The flue gas heat exchanger can be combined into a large heat exchange component.

The fins 42 are arranged in a funnel shape. The heat exchange fins 42 are arranged in a funnel shape with the highest outermost side and the lowest innermost side. This allows the suction slot 44 to have a downward suction when the dust enters the fins 42 under the centrifugal force, which tends to fall down when the dust enters the fins 42, and the dust is difficult to rise above the outermost height of the fins 42 once it falls, thereby increasing the dust collection efficiency.

The bottom of the air exhaust groove 44 penetrates through the shell 1. The uppermost portion of the pumping channel 44 is disposed at the bottom of the uppermost plate 42. The suction groove 44 is provided with a suction port 441 and a vent groove 442. The pumping port 441 of the pumping groove 44 is preferably disposed at the lowest position at the center of each heat exchanger plate 42. The air slots 442 extend from the top to the bottom of the suction slot 44, but the suction openings 441 are located only at the lowest center of each plate 42, so that dust is drawn into the air slots 442 at the lowest center of each plate 42, which provides the advantage of a small opening of the suction openings 441 and maintains a high suction force.

A filter 443 is disposed in the pumping groove 44. Preferably, the filter 443 is a filter bag. The filter 443 may also be selected from other filtering devices, such as filter cotton, filter fiber, filter foam, and the like. The filtering member 443 is preferably provided in plurality and correspondingly provided directly below each suction port 441.

The air inlet 2 and the air outlet 3 are oppositely arranged. The air inlet 2 and the air outlet 3 are disposed on both sides of the housing 1 with respect to the housing 1. The air inlet 2 and the air outlet 3 are arranged on two sides of the shell 1, so that the probability that air directly flows from one side can be reduced.

The air inlet 2 and the air outlet 3 are obliquely arranged. The oblique arrangement of the air inlet 2 and the air outlet 3 refers to that the air inlet 2 and the air outlet 3 are obliquely arranged between 0 and 90 along the horizontal direction of the side surface of the shell 1 and at the point of intersection with the side surface of the shell 1. Preferably, the connection between the air inlet 2 and the air outlet 3 and the shell is tangent, so that the smoke entering the shell 1 can directly circulate in the circumferential direction.

The use method of the flue gas heat exchanger comprises the following steps:

firstly, oil or water for heat exchange in a heat exchange material circulation passage 45 inside a heat exchange column 41 and a heat exchange plate 42 is added into the heat exchange material circulation passage 45, then, flue gas is guided into a shell 1 from an air inlet 2, then, the air inlet 2 is arranged to enter the shell 1 in a tangential direction with the side wall of the shell 1 or enter the shell 1 at a certain included angle, thus a centripetal rotary force can be generated, dust in the flue gas falls into the range of the heat exchange plate 42, the flue gas enters the shell 1 from the air inlet 2 and then circulates around the annular wall of the shell 1, dust with heavier mass is gathered towards the center of a circle of the shell 1 and enters the range of the heat exchange plate 42, then the dust flows in the range of the heat exchange plate 42, an air guide plate 43 guides the air circulation path of the heat exchange plate 42 at the inner layer, and an inward attractive force is formed at the funnel-shaped upper surface of the heat exchange plate 42, the dust is easier to deposit again and is guided to the position of the air exhaust groove 44. The bottom of the air pumping groove 44 is connected to an air pump, the air pump is started after the smoke enters the shell 1, the air pumping port 441 pumps the smoke after the dust is guided to the position of the air pumping groove 44, and the dust collection efficiency is very high because the dust with large mass is sucked to the position of the circle center, and the power of the air pump can maintain normal dust pumping without using a high-power air pump. The plurality of heat exchange plates 42 can collect dust in the shell 1 in a layered mode, so that the inner space of the shell 1 can be divided into a plurality of parts, gas can be circulated in a local range to clean dust, and dust collection efficiency is improved. The filtering member 443 is disposed in the air flow groove 442, so that dust can be rapidly collected. The gas is subjected to heat exchange and dust collection by the multiple heat exchange plates 42 in the shell 1 and finally flows out of the gas outlet 3.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.