CN216924417U

CN216924417U - Air preheater and gas water heater

Info

Publication number: CN216924417U
Application number: CN202121947185.9U
Authority: CN
Inventors: 夏立珍; 穆生鸿; 吴桂安; 邓飞忠; 仇明贵; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-07-08
Anticipated expiration: 2031-08-19

Abstract

The utility model provides an air preheater and a gas water heater, which comprise a shell and an air pipeline, wherein an air inlet and an air outlet are formed on the shell, the air pipeline is arranged in the shell, the air inlet end of the air pipeline is communicated with the air inlet, the air outlet end of the air pipeline is communicated with the air outlet, the shell is also provided with a smoke inlet and a smoke outlet, and a connecting line of the smoke inlet and the smoke outlet is intersected with a connecting line of the air inlet and the air outlet. After the air is preheated, the moisture content is low, the temperature of the air participating in combustion is increased, the fuel is easier to burn, the complete heat loss of the fuel is reduced, the combustion temperature distribution tends to be uniform, the combustion efficiency is improved, and the CO emission is reduced.

Description

Air preheater and gas water heater

Technical Field

The utility model relates to the technical field of water heaters, in particular to an air preheater and a gas water heater.

Background

The waste heat utilization refers to the utilization of energy equipment to collect and use the redundant heat, so that the energy utilization rate and the economy can be improved; the waste heat utilization and recovery approach mainly comprises waste heat power generation, comprehensive utilization and direct utilization, wherein the direct utilization mainly utilizes tail high-temperature flue gas to pass through an air preheater, namely a high-temperature heat exchanger to heat air entering equipment, so that the air temperature is increased, fuel is saved, the combustion efficiency is improved, the combustion stability is improved, and the emission of harmful gases such as CO is reduced. The tail flue gas temperature of the non-condensation type gas water heater is high, especially the flue gas temperature of part of small-liter gas water heaters is up to more than 180 ℃, and the heat is not fully utilized, so that the content of harmful gas is high.

SUMMERY OF THE UTILITY MODEL

The utility model solves one of the problems in the prior related art to a certain extent, and therefore the utility model aims to provide an air preheater which can improve the combustion efficiency.

The above purpose is realized by the following technical scheme:

the air preheater comprises a shell and an air pipeline, wherein an air inlet and an air outlet are formed in the shell, the air pipeline is arranged in the shell, the air inlet end of the air pipeline is communicated with the air inlet, the air outlet end of the air pipeline is communicated with the air outlet, a smoke inlet and a smoke outlet are further formed in the shell, and a connecting line of the smoke inlet and the smoke outlet is intersected with the connecting line of the air inlet and the air outlet.

As a further improvement of the present invention, the housing includes an upper plate and a lower plate, the air inlet is provided on the lower plate, the air outlet is provided on the upper plate, and the air duct is provided between the upper plate and the lower plate.

As a further improvement of the present invention, the smoke inlet is disposed on the right side wall of the housing at a position where the right side wall is close to the bottom of the housing, and the smoke outlet is disposed on the left side wall of the housing at a position where the left side wall is close to the top of the housing.

As a further improvement of the utility model, the diameter of the air pipeline is 10-20 mm.

As a further development of the utility model, the air inlets and/or the air outlets are equal in number, identical in cross-sectional shape and adapted in position to the air ducts.

As a further development of the utility model, the spacing between adjacent air inlets or the air outlets is 20-40 mm.

As a further improvement of the utility model, the shell and the air pipeline are made of steel materials.

As a further improvement of the present invention, the connection between the upper plate and/or the lower plate and the air duct is made by welding.

As a further development of the utility model, the number of air ducts is 16 to 20.

The utility model aims to provide a gas water heater, which improves the combustion efficiency.

A gas heater, includes an air heater, combustion chamber and collection petticoat pipe of the aforesaid, air heater's air outlet with the bottom intercommunication of combustion chamber, the top of combustion chamber with collection petticoat pipe intercommunication.

As a further improvement of the utility model, the smoke exhaust device further comprises a smoke pipe, wherein the smoke inlet end of the smoke pipe is communicated with the smoke collecting hood, and the smoke outlet end of the smoke pipe is communicated with the smoke inlet of the shell.

As a further improvement of the utility model, the diameter of the smoke tube is 30-50 mm.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

1. the utility model provides an air preheater, which has the advantages that the moisture content of air is low after the air is preheated, the temperature of the air participating in combustion is increased, fuel is easier to combust, the total heat loss of the fuel is reduced, the combustion temperature distribution tends to be uniform, the combustion efficiency is improved, and the CO emission is reduced.

2. The utility model provides a gas water heater, which is provided with an air preheater, wherein the moisture content of air is low after the air is preheated, the temperature of air participating in combustion is increased, fuel is easier to combust, the total heat loss of the fuel is reduced, the combustion temperature distribution tends to be uniform, and therefore, the combustion efficiency is improved, and the CO emission is reduced.

Drawings

FIG. 1 is a schematic diagram of an air preheater according to an embodiment;

FIG. 2 is a sectional view of an air preheater according to an embodiment;

FIG. 3 is another sectional view of an air preheater according to an embodiment;

FIG. 4 is a further cross-sectional view of an air preheater according to an embodiment;

fig. 5 is a schematic structural diagram of the gas water heater in the embodiment.

Detailed Description

The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the utility model or equivalent substitutions of parts of technical features without departing from the spirit of the utility model are intended to be covered by the scope of the claims of the utility model.

The first embodiment is as follows:

referring to fig. 1 to 4, an air preheater 1 includes a housing 2 and an air duct 3, an air inlet 221 and an air outlet 211 are formed on the housing 2, the air duct 3 is disposed in the housing 2, an air inlet end of the air duct 3 is communicated with the air inlet 221, an air outlet end of the air duct 3 is communicated with the air outlet 211, a smoke inlet 23 and a smoke outlet 24 are further disposed on the housing 2, and a connection line between the smoke inlet 23 and the smoke outlet 24 intersects with a connection line between the air inlet 221 and the air outlet 211.

The utility model provides an air preheater 1, which has the advantages that the moisture content of air is low after the air is preheated, the temperature of the air participating in combustion is increased, the fuel is easier to burn, the complete heat loss of the fuel is reduced, the combustion temperature distribution tends to be uniform, the combustion efficiency is improved, and the CO emission is reduced.

The connecting line of the smoke inlet 23 and the smoke outlet 24 intersects the connecting line of the air inlet 221 and the air outlet 211. The smoke inlet 23 and the smoke outlet 24 are arranged oppositely, and the air inlet 221 and the air outlet 211 are arranged oppositely.

In some embodiments, when the smoke inlet 23 and the smoke outlet 24 are respectively disposed at the top or the bottom of the housing, the air inlet 221 and the air outlet 211 are respectively disposed on the left side wall and the right side wall of the housing. In some embodiments, when the smoke inlet and

outlet

23 and 24 are disposed on the left and right side walls of the housing, respectively, the air inlet 221 and the air outlet 211 are disposed at the top or bottom of the housing, respectively.

The air duct is disposed within the housing 2 between the air inlet 221 and the air outlet 211. In this embodiment, the housing 2 includes an upper plate 21 and a lower plate 22, the air inlet 221 is provided on the lower plate 22, the air outlet 211 is provided on the upper plate 21, and the air duct 3 is provided between the upper plate 21 and the lower plate 22.

The smoke inlet 23 is arranged on the right side wall of the shell 2 and close to the bottom of the shell 2, the smoke outlet 24 is arranged on the left side wall of the shell 2 and close to the top of the shell 2. So that the flue gas and the air pipeline are fully contacted, and the heat exchange is enhanced.

The air inlets 221 and/or the air outlets 211 are equal in number, have the same cross-sectional shape, and are positioned in the same place as the air ducts 3.

Air enters the housing 2 from the air inlet 221 and flows out of the housing 2 from the air outlet 211 through the air duct 3, and the air can exchange heat during the time passing through the air duct 3 to preheat the air and increase the temperature. In some embodiments, the air conduit 3 may be a straight tube; in some embodiments, the air conduit 3 may be an elbow. The cross section of the elbow can be S-shaped, V-shaped and the like. The air pipeline 3 adopts the elbow, can increase the dwell time of air in the air pipeline 3, increase with thermal area of contact and contact time.

The diameter of the air pipeline 3 is 10-20 mm. In the present embodiment, the diameter of the air duct 3 is 15 mm.

The distance between the adjacent air inlets 221 or the air outlets 211 is 20-40 mm. In this embodiment, the spacing between adjacent air inlets 221 or the air outlets 211 is 30 mm.

The shell 2 and the air pipeline 3 are made of steel materials.

The connection between the upper plate 21 and/or the lower plate 22 and the air duct 3 is made by welding. So that the connection between the air duct 3 and the upper and

lower plates

21 and 22 is secured.

The number of the air pipes 3 is 16-20. In the present embodiment, the number of the air ducts 3 is 18. The air inlets 221 are transversely arranged on the upper plate 21 of the housing 2 with 6 sets of air inlet sets, each set of air inlet sets comprising 3 vertically arranged air inlets 221, for a total of 18 air inlets 221. The air outlets 211 are transversely arranged on the upper plate 21 of the housing 2 with 6 sets of air outlet groups, each set of air outlet groups including 3 vertically arranged air outlets 211, for a total of 18 air outlets 211.

The second embodiment:

referring to fig. 5, a gas water heater 100 comprises an air preheater 1, a combustion chamber 101 and a smoke collection hood 102 as described above, wherein an air outlet 211 of the air preheater 1 is communicated with the bottom of the combustion chamber 101, and the top of the combustion chamber 101 is communicated with the smoke collection hood 102.

The utility model provides a gas water heater, which is simple and practical in structure, utilizes tail flue gas to preheat air entering a combustion chamber 101 for combustion, improves combustion efficiency and reduces harmful gas emission.

The smoke collecting hood further comprises a smoke pipe 103, wherein the smoke inlet end of the smoke pipe 103 is communicated with the smoke collecting hood 102, and the smoke outlet end of the smoke pipe 103 is communicated with the smoke inlet 23 of the shell 2.

The diameter of the smoke tube 103 is 30-50 mm. The diameter of the smoke tube 103 is larger than the diameter of the air duct 3 to allow more smoke to enter the housing 2.

The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.

Claims

1. The utility model provides an air preheater, its characterized in that includes casing (2) and air duct (3) form air intlet (221) and air outlet (211) on casing (2), air duct (3) set up in casing (2), just the inlet end of air duct (3) with air intlet (221) are linked together, the end of giving vent to anger of air duct (3) with air outlet (211) are linked together still be equipped with into mouth (23) and outlet flue (24) on casing (2), enter mouth (23) with the connecting wire of outlet flue (24) with air intlet (221) with the connecting wire of air outlet (211) is crossing.

2. An air preheater according to claim 1, wherein said housing (2) comprises an upper plate (21) and a lower plate (22), said air inlet (221) being provided on said lower plate (22), said air outlet (211) being provided on said upper plate (21), said air duct (3) being provided between said upper plate (21) and said lower plate (22).

3. An air preheater according to claim 2, wherein the inlet (23) is provided in a right side wall of the housing (2) at a position where the right side wall is close to the bottom of the housing (2), and the outlet (24) is provided in a left side wall of the housing (2) at a position where the left side wall is close to the top of the housing (2).

4. An air preheater according to claim 1, characterised in that the diameter of the air duct (3) is 10-20 mm.

5. An air preheater according to claim 1, characterized in that the air inlets (221) and/or the air outlets (211) are equal in number and have the same cross-sectional shape and are adapted in position to the air ducts (3).

6. An air preheater according to claim 1, wherein the spacing between adjacent air inlets (221) or air outlets (211) is 20-40 mm.

7. An air preheater according to claim 2, characterized in that the connection between the upper plate (21) and/or the lower plate (22) and the air duct (3) is by means of welding.

8. A gas water heater comprising an air preheater (1) according to any one of claims 1 to 7, a combustion chamber (101) and a fume collecting hood (102), the air outlet (211) of the air preheater communicating with the bottom of the combustion chamber (101), the top of the combustion chamber (101) communicating with the fume collecting hood (102).

9. A gas water heater according to claim 8, further comprising a smoke pipe (103), wherein the smoke inlet end of the smoke pipe (103) is communicated with the smoke collecting cover (102), and the smoke outlet end of the smoke pipe (103) is communicated with the smoke inlet (23) of the housing (2).

10. A gas water heater according to claim 9, wherein the diameter of the flue tube (103) is 30-50 mm.