CN210568551U

CN210568551U - Low-temperature air preheater of energy-saving boiler

Info

Publication number: CN210568551U
Application number: CN201920683459.4U
Authority: CN
Inventors: 李德民; 周大同
Original assignee: Jiangsu Zhongke Heavy Industry Co ltd
Current assignee: Jiangsu Zhongke Heavy Industry Co ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-05-19
Anticipated expiration: 2029-05-14

Abstract

The utility model discloses a low-temperature air preheater of an energy-saving boiler, which comprises a high-temperature tail gas conveying pipeline, a base bracket, a base, a blower, a low-temperature tail gas output pipeline, an exhaust fan, a heat exchange device, a preheated air conveying pipeline and a furnace ash filter, wherein the furnace ash filter is added to filter ash in the boiler and slag which is not completely combusted, thereby avoiding the ash and slag from entering the heat exchange device to cause the heat exchange device to be damaged by firing, the preheating device adopts an inner-outer two-layer structure, the inner layer of the preheating device is a heat dissipation pipeline, the outer layer is a heated air pipeline, and simultaneously, heat dissipation fins are added on the heat dissipation pipeline to make the heat in the heat dissipation pipeline more easily dissipated, thereby accelerating the heating of air, the heat dissipation pipeline positioned in the preheating device adopts a bent snake shape, so that the high-temperature tail gas can dissipate heat for a long time, the utility model discloses heat transfer efficiency is high, adopts double-deck thermal-insulated shell, avoids the heat to scatter and disappear, and then avoids the heat to run off.

Description

Low-temperature air preheater of energy-saving boiler

Technical Field

The utility model belongs to the technical field of boiler equipment; in particular to a low-temperature air preheater of an energy-saving boiler.

Background

The air preheater is a heating surface for preheating air before entering the boiler to a certain temperature by smoke in a flue at the tail part of the boiler through internal radiating fins, and is equipment for improving the heat exchange performance of the boiler and reducing energy consumption. Air preheaters are generally classified into plate type, rotary type and tubular type.

Traditional air heater does not be equipped with ashes filter equipment, and this just makes the pre-heater fire on heat transfer element can deposit the messenger air heater that the combustible substance that does not burn to the greatest extent in a large amount in carrying out the course of the work, and traditional air heater adopts contact heat-conduction simultaneously mostly, and air conduit and tail gas pipeline contact heat conduction promptly, and this mode not only heat conduction efficiency is low, and heat loss is serious simultaneously.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an energy-conserving boiler low temperature air heater.

The purpose of the utility model can be realized by the following technical scheme:

an energy-saving boiler low-temperature air preheater comprises a high-temperature tail gas conveying pipeline, a base support, a base, a blower, a low-temperature tail gas output pipeline, an exhaust fan, a heat exchange device, a preheated air conveying pipeline and a furnace ash filter, the lower end of the base is provided with a base bracket, the furnace ash filter is arranged on the base, the heat exchange device is arranged on the base, one end of the high-temperature tail gas conveying pipeline is connected with the boiler, the other end of the high-temperature tail gas conveying pipeline is connected with a furnace ash filter, the other end of the furnace ash filter is connected with one end of the high-temperature filtered tail gas conveying pipeline, the other end of the high-temperature filtered tail gas conveying pipeline is connected with one end of a heat exchange device, the other end of the heat exchange device is connected with an exhaust fan through a low-temperature tail gas output pipeline, the exhaust fan is arranged on the base, the preheated air conveying pipe is arranged at one end of the heat exchange device, and the other end of the heat exchange device is connected with the air blower through the air conveying pipeline.

Further, heat exchange device includes high temperature tail gas input pipeline, heat dissipation pipeline, cold air input pipeline, low temperature tail gas exhaust pipe way, shell and hot-air conveying pipeline, inside the shell was located to the heat dissipation pipeline, heat dissipation pipeline one end was connected with high temperature tail gas input pipeline, and the other end is connected with low temperature tail gas exhaust pipe way, high temperature tail gas input pipeline one end is connected the heat dissipation pipeline, and the other end pierces through the shell and is connected with high temperature tail gas conveying pipeline, low temperature tail gas exhaust pipe way one end is connected the heat dissipation pipeline, and the other end pierces through the shell and is connected with low temperature tail gas output pipeline, cold air input pipeline locates under the shell on the terminal surface, and pierces through the shell and stretch out inboard in the shell, hot-air conveying pipeline locates on the shell up end, and pierces through the shell and stretch out inboard in the shell.

Furthermore, the heat dissipation pipeline is arranged in the shell in a coiled snake shape, and the wall of the pipeline outside the heat dissipation pipeline is provided with heat dissipation fins.

Furthermore, the shell is of a double-layer structure, and a heat insulation layer is arranged between the double-layer structure.

Further, the furnace dust filter comprises a filter upper cover, an output port, an alloy filter screen, a fireproof padding, a filter shell and an input port, wherein the filter upper cover is arranged on the filter shell, the alloy filter screen is arranged on the inner side of the filter shell, the output port and the input port are respectively arranged on two sides of the filter shell, and the fireproof padding is arranged at the lower end of the alloy filter screen;

the alloy filter screen is equipped with threely, vertical arrangement respectively in the filter housing, output port and input port are located alloy filter screen two fronts respectively, input port and high temperature tail gas pipeline are connected, output port and high temperature filtration tail gas pipeline are connected.

The utility model has the advantages that: the utility model discloses add the ashes filter of stove ash, and then filter the ashes in the boiler and the slag of not complete combustion, avoid getting into in the heat exchange device, lead to the heat exchange device to fire and damage, preheating device adopts inside and outside two-layer structure, its inlayer is the heat dissipation pipeline, the outer heated air pipeline that is, add heat radiation fins on the while pipeline that will dispel the heat, make the heat in the cooling tube distribute out more easily, thereby the air of heating with higher speed, the heat dissipation pipeline that is located preheating device adopts curved snake form, make high temperature tail gas can dispel the heat for a long time, the heat is big, the heated air of being convenient for, the utility model discloses heat transfer efficiency is high, adopts double-deck thermal-insulated shell, avoids the heat to scatter and disappear, and then.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the low-temperature air preheater of the energy-saving boiler of the present invention;

FIG. 2 is a schematic structural view of a heat exchange device of a low-temperature air preheater of the energy-saving boiler of the present invention;

FIG. 3 is a schematic diagram of the ash filter of the low-temperature air preheater of the energy-saving boiler of the present invention.

Detailed Description

Referring to fig. 1-3, a low-temperature air preheater for an energy-saving boiler includes a high-temperature tail gas delivery pipe 1, a base support 2, a base 3, a blower 4, a low-temperature tail gas output pipe 5, an exhaust fan 6, a heat exchange device 7, a preheated air delivery pipe 8, and a soot filter 9.

The lower end of the base 3 is provided with a base bracket 2, and the furnace dust filter 9 is arranged on the base 3.

One end of the heat exchanging device 7 is mounted on the base 3.

The boiler other end is connected to 1 one end of high temperature tail gas pipeline and is connected ashes filter 9, and the one end of high temperature filtration tail gas pipeline 10 is connected to the ashes filter 9 other end, and the high temperature filtration tail gas pipeline 10 other end is connected with 7 one ends of heat exchange device, and the 7 other ends of heat exchange device pass through low temperature tail gas output pipeline 5 and are connected with exhaust fan 6, and exhaust fan 6 is located on base 3.

The preheated air delivery pipe 8 is provided at one end of the heat exchanging device 7, and the other end of the heat exchanging device 7 is connected to the blower 4 through an air delivery pipe.

As shown in fig. 2, the heat exchange device 7 includes a high temperature exhaust gas input pipeline 71, a heat emission pipeline 72, a cold air input pipeline 73, a low temperature exhaust gas discharge pipeline 74, a housing 75 and a hot air delivery pipeline 76, the heat emission pipeline 72 is disposed inside the housing 75, one end of the heat emission pipeline 72 is connected to the high temperature exhaust gas input pipeline 71, the other end is connected to the low temperature exhaust gas discharge pipeline 74, one end of the high temperature exhaust gas input pipeline 71 is connected to the heat emission pipeline 72, the other end penetrates through the housing 75 to be connected to the high temperature exhaust gas delivery pipeline 1, one end of the low temperature exhaust gas discharge pipeline 74 is connected to the heat emission pipeline 72, the other end penetrates through the housing 75 to be connected to the low temperature exhaust gas output pipeline 5, the cold, and the penetration casing 75 is extended inside the casing 75, the hot air delivery duct 76 is provided on the upper end surface of the casing 75, and the penetration casing 75 is extended inside the casing 75.

Preferably, the heat dissipation pipe 72 is disposed in the housing 75 in a coil shape, and the outer wall of the heat dissipation pipe 72 is provided with heat dissipation fins.

Preferably, the housing 75 is a double-layer structure with a thermal insulation layer disposed therebetween.

Preferably, as shown in fig. 3, the furnace dust filter 9 includes a filter upper cover 91, an output port 92, an alloy filter screen 93, a fireproof packing 94, a filter housing 95 and an input port 96, the filter upper cover 91 is disposed on the filter housing 95, the alloy filter screen 93 is disposed inside the filter housing 95, the output port 92 and the input port 96 are respectively disposed on two sides of the filter housing 95, and the fireproof packing 94 is disposed at a lower end of the alloy filter screen 93.

Preferably, three alloy filter screens 93 are vertically arranged in the filter housing 95, the output ports 92 and the input ports 96 are respectively arranged on two front surfaces of the alloy filter screens 93, the input ports 96 are connected with the high-temperature tail gas conveying pipeline 1, and the output ports 92 are connected with the high-temperature tail gas filtering conveying pipeline 10.

With reference to fig. 1, the preheater of the present invention has the following working steps:

1) the exhaust fan 6 operates to start air suction, the boiler tail gas enters the furnace ash filter 9 from the high-temperature tail gas conveying pipeline 1, ash and incompletely combusted slag in the tail gas are filtered through the alloy filter screen 93 in the furnace ash filter 9, the slag falls into the fireproof packing 94 to be extinguished, and the filtered tail gas is discharged from the output port 92;

2) filtered tail gas enters a heat dissipation pipeline 72 in the heat exchange device 7 through a high-temperature filtered tail gas conveying pipeline 10, at the moment, the air blower 4 operates, air enters from a cold air input pipeline 73, heat is dissipated into the shell 75 through the heat dissipation pipeline 72 in the shell 75 to heat the air, the heated air is discharged from a hot air conveying pipeline 76 and enters a boiler, and the tail gas subjected to heat dissipation is discharged from a low-temperature tail gas discharge pipeline 74 and enters a low-temperature tail gas output pipeline 5;

3) the tail gas after cooling is exhausted by the exhaust fan 6.

The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.

Claims

1. A low-temperature air preheater of an energy-saving boiler is characterized by comprising a high-temperature tail gas conveying pipeline (1), a base support (2), a base (3), a blower (4), a low-temperature tail gas output pipeline (5), an exhaust fan (6), a heat exchange device (7), a preheated air conveying pipeline (8) and a furnace ash filter (9),

the lower end of the base (3) is provided with a base bracket (2), and the furnace ash filter (9) is arranged on the base (3);

one end of the high-temperature tail gas conveying pipeline (1) is connected with the boiler, the other end of the high-temperature tail gas conveying pipeline is connected with a furnace ash filter (9), and the other end of the furnace ash filter (9) is connected with one end of a high-temperature filtered tail gas conveying pipeline (10);

the other end of the high-temperature filtered tail gas conveying pipeline (10) is connected with one end of a heat exchange device (7);

the heat exchange device (7) is arranged on the base (3), and the other end of the heat exchange device is connected with the exhaust fan (6) through a low-temperature tail gas output pipeline (5);

the exhaust fan (6) is arranged on the base (3);

the preheating air conveying pipe (8) is arranged at one end of the heat exchange device (7), and the other end of the heat exchange device (7) is connected with the air blower (4) through an air conveying pipeline;

wherein, heat exchange device (7) includes high temperature tail gas input pipeline (71), heat dissipation pipeline (72), cold air input pipeline (73), low temperature tail gas exhaust pipe way (74), shell (75) and hot air pipeline (76), inside shell (75) was located to heat dissipation pipeline (72), heat dissipation pipeline (72) one end is connected with high temperature tail gas input pipeline (71), and the other end is connected with low temperature tail gas exhaust pipe way (74), heat dissipation pipeline (72) is connected to high temperature tail gas input pipeline (71) one end, and the other end pierces through shell (75) and is connected with high temperature tail gas pipeline way (1), heat dissipation pipeline (72) is connected to low temperature tail gas exhaust pipe way (74) one end, and the other end pierces through shell (75) and is connected with low temperature tail gas output pipeline (5), cold air input pipeline (73) is located on shell (75) terminal surface down, and the penetrating shell (75) extends to the inner side of the shell (75), the hot air conveying pipeline (76) is arranged on the upper end surface of the shell (75), and the penetrating shell (75) extends to the inner side of the shell (75).

2. A low-temperature air preheater of an energy-saving boiler as claimed in claim 1, wherein said heat-dissipating duct (72) is disposed in the housing (75) in a serpentine shape, and the wall of the duct outside said heat-dissipating duct (72) is provided with heat-dissipating fins.

3. An energy saving boiler low temperature air preheater as claimed in claim 2, wherein said housing (75) is of double layer construction with a layer of insulation between the double layer construction.

4. The low-temperature air preheater of the energy-saving boiler as claimed in claim 1, wherein the ash filter (9) comprises a filter upper cover (91), an output port (92), an alloy filter screen (93), a fireproof packing (94), a filter housing (95) and an input port (96), the filter upper cover (91) is arranged on the filter housing (95), the alloy filter screen (93) is arranged on the inner side of the filter housing (95), the output port (92) and the input port (96) are respectively arranged on two sides of the filter housing (95), and the fireproof packing (94) is arranged at the lower end of the alloy filter screen (93).

5. The low-temperature air preheater of the energy-saving boiler according to claim 4, wherein three alloy filter screens (93) are vertically arranged in the filter housing (95), the output port (92) and the input port (96) are respectively arranged on two front faces of the alloy filter screens (93), the input port (96) is connected with the high-temperature tail gas conveying pipeline (1), and the output port (92) is connected with the high-temperature filtered tail gas conveying pipeline (10).