CN205606620U - Fuel gas heating furnace combustion air preheating device - Google Patents

Abstract

The utility model relates to a fuel gas heating furnace combustion air preheating device. Respectively be equipped with an intermediate layer in the oven face of fuel gas heating furnace both sides, interbedded lower extreme communicates with each other with the bottom of furnace chamber, and the upper end communicates with each other with fuel gas heating furnace's chimney, the inlet manifold welds into one wholly with give vent to anger house steward and a plurality of metal breather pipes among the air heater to place in the oven face intermediate layer of fuel gas heating furnace both sides, the air outlet of air -blower communicates with each other with inlet manifold's air inlet, and inlet manifold's gas outlet communicates with each other with the lower port of a plurality of metal breather pipes, and the last port of a plurality of metal breather pipes communicates with each other with the house steward's that gives vent to anger air inlet. The utility model discloses the waste gas passing away that waste gas -> oven face intermediate layer -> chimney in the furnace chamber constitutes and the combustion air -> inlet manifold -> metal breather pipe -> in the air -blower give vent to anger combustion air passageway that house steward -> gas burner constitutes and form to intersect and preheat, and messenger combustion air obtains furthest and preheats to the thermal efficiency that makes fuel gas heating furnace improves by a wide margin.

Description

Combustion-supporting air preheating device for gas heating furnace

technical field

The utility model relates to a preheating device for combustion-supporting air of a gas heating furnace, in particular to a structure of a combustion-supporting air preheating device for a gas heating furnace, and belongs to the technical field of design and manufacture of gas heating equipment.

Background technique

The thermal efficiency of gas-fired furnaces is low, generally between 15% and 35%. The main reason is that the exhaust gas of gas-fired furnaces takes away a large amount of heat, and the higher the furnace temperature, the lower the thermal efficiency. Practice has proved that the use of gas furnace exhaust gas can improve thermal efficiency. The method is to use the waste heat of exhaust gas to preheat air (combustion-supporting gas), preheat fuel gas, and preheat workpieces. Among them, preheating air is the most commonly used. The result of preheating is that the higher the preheating temperature, the higher the thermal efficiency and the better the energy saving effect. Generally, every 100°C increase in the preheating temperature can save 5% of fuel gas. Therefore, in order to improve the thermal efficiency of the gas-fired heating furnace, it is necessary to fully preheat the combustion-supporting gas by using the waste heat of the exhaust gas in the heating furnace, so as to maximize the thermal efficiency of the gas-fired heating furnace.

Contents of the invention

The purpose of the utility model is to provide a combustion-supporting air preheating device for a gas-fired heating furnace, which aims to make full use of the waste gas discharged from the gas-fired heating furnace, preheat the combustion-supporting air to the greatest extent, and maximize the gas thermal efficiency of the heating furnace.

In order to achieve the above object, the utility model adopts the following technical solutions: a gas heating furnace combustion air preheating device, including the furnace wall surfaces on both sides of the gas heating furnace, two air preheaters, a blower and the top surface of the gas heating furnace There are multiple gas nozzles, and the furnace chamber is between the furnace walls on both sides of the gas heating furnace; the air preheater is composed of several metal ventilation pipes, an air intake main pipe and an air outlet main pipe, and the air outlet main pipe is There is a gas outlet connected to multiple gas nozzles, which is characterized by:

The furnace walls on both sides of the gas heating furnace are respectively provided with an interlayer, the lower end of the interlayer communicates with the bottom of the gas heating furnace cavity through the exhaust hole, and the upper end communicates with the chimney of the gas heating furnace;

In the air preheater, the air intake main pipe and the air outlet main pipe are in a horizontal structure parallel to each other, and several metal ventilation pipes are welded into a whole in a vertical structure parallel to each other and spaced from each other, and placed on both sides of the gas heating furnace. In the interlayer of the furnace wall;

The air outlet of the blower communicates with the air inlet of the air intake main pipe, the air outlet of the air intake main pipe communicates with the lower ports of several metal ventilation pipes, and the upper ports of several metal ventilation pipes communicate with the air inlet of the air outlet main pipe.

Further, the flow diameter of the several metal ventilation pipes is set between 30mm and 50mm;

Further, the intake manifold and the exhaust manifold are square pipes.

The utility model forms a cross preheating through the waste gas discharge channel formed by the furnace cavity → the interlayer of the furnace wall → the chimney and the combustion-supporting air channel formed by the blower → the intake main pipe → the metal ventilation pipe → the gas outlet main pipe → the gas nozzle, so that the gas heating furnace can be maximized. The exhaust gas is fully reused, so that the combustion air can be preheated to the greatest extent, so that the thermal efficiency of the gas heating furnace is greatly improved.

Description of drawings

Accompanying drawing 1 is the main view structure schematic diagram of utility model;

Accompanying drawing 2 is A-A sectional structural schematic diagram in accompanying drawing 1.

In accompanying drawings 1 and 2: 1 furnace wall surface, 2 air preheater, 201 intake main pipe, 202 gas outlet main pipe, 203 metal ventilation pipe, 3 interlayer, 4 chimney, 5 furnace cavity, 6 gas nozzle, 7 furnace top surface , 8 blower, a exhaust hole, b and c and d and e are air outlets respectively.

detailed description

Below in conjunction with accompanying drawing, the utility model is further explained:

As shown in accompanying drawing 1, the furnace chamber 5 is between the furnace wall surfaces 1 on both sides of the gas-fired heating furnace; There are gas outlets b, c, d, and e connected with multiple gas nozzles 6 on the top; an interlayer 3 is respectively provided in the furnace wall surface 1 on both sides of the gas heating furnace, and the lower end of the interlayer 3 is connected to the gas heating furnace through the exhaust hole a. The bottom of the furnace cavity 5 communicates, and the upper end communicates with the chimney 4 of the gas-fired heating furnace; the air intake main pipe 201 and the air outlet main pipe 202 in the air preheater 2 are in a horizontal structure parallel to each other, and several metal ventilation pipes 203 are in parallel with each other. The vertical structure of the spacing is welded into a whole, and placed in the interlayer 3 of the furnace wall surface 1 on both sides of the gas heating furnace; The lower ports of several metal ventilation pipes 203 communicate with each other, and the upper ports of several metal ventilation pipes 203 communicate with the air inlet of the outlet main pipe 202; the flow diameter of several metal ventilation pipes 203 is set between 30mm and 50mm; The main pipe 201 and the air outlet main pipe 202 are square pipes.

When the utility model is working, the waste gas produced by the gas heating furnace passes through the furnace cavity 5 → exhaust hole a → interlayer 3 of the furnace wall surface → chimney 4 → in the atmosphere; combustion air → blower 8 → main intake pipe 201 → metal ventilation pipe 203 → gas outlet Main pipe 202→b, c, d, e→gas nozzle→furnace cavity 5, the above-mentioned two paths of gas form intersections in the interlayer 3 of the furnace wall surface 1 on both sides of the gas heating furnace, and also form the preheating of the combustion-supporting air; The flow diameter of the metal ventilation pipe 203 in the new model is set between 30mm and 50mm, and the intake manifold 201 and the outlet manifold 202 are square tubes, thus increasing the intake manifold 201, the metal ventilator 203, and the outlet manifold to the greatest extent. 202 of the heating area, so that the waste gas discharged from the gas heating furnace can be fully reused, and the thermal efficiency of the gas heating furnace can be greatly improved.

Claims (3)

1. a gas-fired heater combustion air preheating device, including many gas nozzles of face, furnace wall, two air preheaters, an aerator and the gas heating furnace top surface of gas-fired heater both sides, is furnace chamber between the face, furnace wall of described gas-fired heater both sides；Described air preheater is made up of some metal breathers, an an inlet manifold and house steward that gives vent to anger, and the house steward that gives vent to anger is provided with the gas outlet communicated with many gas nozzles, it is characterised in that:

Being respectively provided with an interlayer in the face, furnace wall of described gas-fired heater both sides, the lower end of this interlayer is communicated by the bottom of steam vent with gas-fired heater furnace chamber, and upper end communicates with the chimney of gas-fired heater；

In described air preheater, inlet manifold and the house steward that gives vent to anger are in the transversary being parallel to each other, some metal breathers in being parallel to each other, the vertical structure of mutual spacing is welded into a whole, and be seated in face, the furnace wall interlayer of gas-fired heater both sides；

The air outlet of described aerator communicates with the air inlet of inlet manifold, and the gas outlet of inlet manifold communicates with the lower port of some metal breathers, and the upper port of some metal breathers communicates with the air inlet of the house steward that gives vent to anger.

A kind of gas-fired heater combustion air preheating device the most according to claim 1, it is characterised in that: the through-flow diameter of described some metal breathers is arranged between 30mm～50mm.

A kind of gas-fired heater combustion air preheating device the most according to claim 1, it is characterised in that: described inlet manifold and the house steward that gives vent to anger are for square tube.