CN204987902U - Glass melting furnace exhaust -heat boiler's heat transfer structure - Google Patents

Abstract

The utility model relates to the utilization field of low-temperature flue gas (the temperature of the flue gas is lower than 180 DEG C) of a waste heat boiler of a glass melting furnace, in particular to a heat exchange structure of a waste heat boiler of a glass melting furnace. It includes the shell and the air inlet pipe group and the air outlet pipe group arranged vertically in the shell horizontally. The air inlet pipe group inlet and the air outlet pipe group outlet are arranged on the side wall of the shell. The flue gas inlet is provided with a flue gas outlet at the lower part, the outlet of the air outlet pipe group is connected with the glass melting furnace, and the outlet end of the air inlet pipe group is connected with the inlet end of the air outlet pipe group. Air is used as the heat exchange medium, and the traditional high-pressure deoxygenation evaporator is replaced by the normal-pressure air preheater. When the pipeline is corroded by low-temperature flue gas, the equipment will not be shut down, and the safety hazard of the waste heat boiler is eliminated.

Description

Heat Exchange Structure of Waste Heat Boiler in Glass Melting Furnace

technical field

The utility model relates to the utilization field of low-temperature flue gas (the temperature of the flue gas is lower than 180 DEG C) of a waste heat boiler of a glass melting furnace, in particular to a heat exchange structure of a waste heat boiler of a glass melting furnace.

Background technique

In the process of glass production, the melting furnace consumes a large amount of fuel in melting raw materials, and produces a large amount of complex and corrosive high-temperature flue gas. The heat energy is usually used for waste heat utilization by waste heat boilers. At the part where the low-temperature flue gas of the waste heat boiler passes, water is usually used as the heat exchange medium at present, and the deoxygenation evaporator is used as the heat exchange equipment, and the waste heat of the flue gas is used to heat the boiler feed water, and the waste heat of the flue gas is recycled. Deoxygenation evaporator is used as an integral part of the pressure vessel. There is a set of strict management system from heat exchange equipment design, material selection, manufacture, and installation, with strict requirements, long equipment manufacturing cycle and high cost. Due to the complex and changeable raw materials and fuels for glass production, the composition of the flue gas produced is complex. After the high-temperature flue gas is heat-exchanged to the low-temperature flue gas through the waste heat boiler, the temperature of the flue gas may be at the dew point of the corrosive gas in the heat exchange area of the oxygen-removing evaporator. Up and down, it is very easy to cause corrosion to the pipes of the heat exchange equipment of the deaeration evaporator, resulting in the leakage of the heat exchange medium water, resulting in the inability of the waste heat boiler to operate continuously. Due to the continuity of glass furnace production, the outage of the waste heat boiler will cause problems such as the inability to recover waste heat, waste of energy, and low recycling efficiency. In addition, after the waste heat boiler is out of operation, the follow-up flue gas cannot be denitrified, desulfurized, and dust-removed, and the flue gas cannot be discharged up to the standard, causing air pollution. As a part of the waste heat boiler, the deoxygenation evaporator is also a part of the pressure vessel. Its corrosion is a major safety hazard. It is a source of safety hazards, with great safety risks and difficult equipment management.

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides a heat exchange structure of a waste heat boiler of a glass melting furnace which is safe, energy-saving and pollution-free.

The technical scheme of the utility model is: a heat exchange structure of a waste heat boiler of a glass melting furnace, which includes a shell and an air inlet pipe group and an air outlet pipe group horizontally arranged in the shell and distributed longitudinally. The corresponding position of the air intake pipe group is provided with an air inlet pipe group inlet, and the corresponding position of the air outlet pipe group is provided with an air outlet pipe group outlet. The top of the shell is provided with a smoke inlet, and the lower part is provided with a smoke outlet. The air outlet of the air outlet pipe group communicates with the glass melting furnace, and the air outlet end of the air inlet pipe group communicates with the air inlet end of the air outlet pipe group.

Further, the air inlet pipe group and the air outlet pipe group both include plate-shaped brackets arranged vertically and parallel in the housing and fixedly connected to the inner wall of the housing, and multiple rows of pipelines stacked and fixed between the plate-shaped brackets , each row of pipelines includes a plurality of thin tubes evenly distributed horizontally, small holes communicating with the thin tubes are provided on the surface of the plate-shaped support, a gap is provided between the thin tubes, and the smoke The gas inlet and the flue gas outlet communicate through the gap to form a flue gas heat exchange channel.

Further, the plate-shaped support at the outlet end of the air inlet pipe group and the plate-shaped support at the air outlet end of the air outlet pipe group are located on the same side of the housing, and a cavity is provided between the inner wall of the housing, and the cavity forms an air intake pipe The air duct for gas flow in the group and the air outlet pipe group.

Further, a fan is connected between the air outlet of the air outlet pipe group and the glass melting furnace.

Further, the air inlet pipe group is located below the air outlet pipe group.

The beneficial effects of the utility model: air is used as the heat exchange medium, and the traditional high-pressure deoxygenation evaporator is replaced by an air preheater at normal pressure, and many separate thin tubes are used as pipelines for transporting the heat exchange medium, even if some The thin tube is corroded by the low-temperature flue gas, and it will not affect the flow of air in other thin tubes, so it will not cause equipment shutdown and eliminate the safety hazard of the waste heat boiler. The air inlet pipe group and the air outlet pipe group are composed of multiple thin pipes, which have a large contact area with the low-temperature flue gas, and the heat exchange effect is good; after absorbing the heat of the low-temperature flue gas, the air is sent back to the glass melting furnace for combustion, which reduces the fuel consumption. Loss, save energy. The waste heat boiler adopting this heat exchange equipment has a long operation period, high waste heat recovery efficiency, less investment in heat exchange equipment, and good economic benefits. The subsequent flue gas desulfurization, denitrification, and dust removal equipment operate stably, and the flue gas discharge meets the standard, with obvious environmental protection benefits.

Description of drawings

Fig. 1 is a front view of the utility model;

Fig. 2 is a top view of the utility model;

Fig. 3 is the front view of the air intake pipe group (air outlet pipe group);

Fig. 4 is the top view of the air inlet pipe group (air outlet pipe group);

In the figure: 1—shell, 2—thin tube, 3—inlet of air inlet pipe group, 4—air outlet of air outlet pipe group, 5—inlet of flue gas, 6—outlet of flue gas, 7—heat exchange of flue gas Passage, 8—air duct, 9—plate support.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in Figures 1 and 2, the utility model includes a housing 1, the top of the housing 1 is provided with a smoke inlet 5, the bottom is provided with a smoke outlet 6, and the upper part of the side wall is provided with an air inlet pipe group inlet 3 and an air inlet. The outlet 4 of the air outlet pipe group, the air outlet 4 of the air outlet pipe group is located above the side wall, and the air inlet 3 of the air intake pipe group is located below the side wall. In the housing 1, an air inlet pipe group is provided at a position corresponding to the air inlet pipe group inlet 3, and an air outlet pipe group is arranged at a position corresponding to the air outlet pipe group outlet 4. The air inlet pipe group and the air outlet pipe group have a complete structure same.

As shown in Figures 3 and 4, it is a schematic structural view of the air intake pipe group (air outlet pipe group). Three connected plate-shaped supports 9 and multiple rows of pipelines stacked and fixed between the plate-shaped supports 9, each row of pipelines includes a plurality of thin tubes 2 evenly distributed horizontally, and the thin tubes 2 pass through the middle plate-shaped support 9 is welded and fixed with the plate support 9 at both ends. The plate surface of plate support 9 is provided with the small hole that communicates with capillary 2, and air outlet pipe group is arranged on the top of air inlet pipe group, is provided with gap between their capillary pipe and capillary, smoke inlet 5 and The flue gas outlets 6 communicate through the gap to form a flue gas heat exchange channel 7 .

The plate-shaped support at the air intake end of the air intake pipe group corresponds to the air intake port 3 of the air intake pipe group, and the air intake port 3 of the air intake pipe group communicates with the atmosphere; Corresponding to the gas port 4, the gas outlet 4 of the air outlet pipe group communicates with the glass melting furnace through a fan. The plate-shaped bracket at the outlet end of the air intake pipe group and the plate-shaped support at the air inlet end of the air outlet pipe group are located on the same side of the housing 1, and a cavity is provided between the inner wall of the housing, and the cavity forms the connection between the air inlet pipe group and the air outlet. The air duct 8 for gas flow in the trachea group, the air in the air intake pipe group enters in the air outlet pipe group through this air duct.

The low-temperature flue gas produced by the glass melting furnace enters the interior of the shell 1 through the flue gas inlet 5, and the low-temperature flue gas after heat exchange is discharged through the flue gas heat exchange channel 7 and the flue gas outlet 6; while the air passes through the air inlet of the air intake pipe group. 3 Enter the thin tube 2 inside the air inlet pipe group, absorb the heat of the flue gas, and then extract it from the outlet 4 of the air outlet pipe group through the fan, and send it to the glass melting furnace for combustion. It can not only prevent the outage of the waste heat boiler caused by the leakage of the water medium, but also save energy. When the thin tube 2 and the inner wall of the shell 1 can be coated with enamel materials, it can also prevent corrosion, so that the waste heat boiler can run better.

The above is only a specific embodiment of the present utility model. It should be pointed out that any changes or replacements that can be easily imagined by those skilled in the art within the technical scope disclosed in the present utility model should be covered by the present utility model. within the scope of protection.

Claims (5)

1. A heat exchange structure for a waste heat boiler of a glass melting furnace, characterized in that: it comprises a housing (1) and an air inlet pipe group and an air outlet pipe group arranged vertically in the housing (1) horizontally, the The side wall of the housing (1) is provided with an air inlet pipe group inlet (3) corresponding to the air inlet pipe group, and an air outlet pipe group outlet (4) is provided at a position corresponding to the air outlet pipe group. The top of the body (1) is provided with a flue gas inlet (5), and the lower part is provided with a flue gas outlet (6). The air outlet of the air outlet pipe group (4) communicates with the glass melting furnace, and the outlet of the air inlet pipe group is connected to the The inlet end of the air outlet pipe group is connected. 2. The heat exchange structure of the waste heat boiler of a glass melting furnace according to claim 1, characterized in that: the air inlet pipe group and the air outlet pipe group are both vertically and parallelly arranged in the shell (1) and surrounded by The plate-shaped brackets (9) fixedly connected to the inner wall of the housing (1) and the multiple rows of pipelines stacked and fixed between the plate-shaped brackets (9), each row of pipelines includes a plurality of thin tubes (2) evenly distributed horizontally , the plate-shaped bracket (9) is provided with a small hole communicating with the thin tube (2), a gap is provided between the thin tube (2) and the thin tube (2), and the smoke inlet (5) communicates with the flue gas outlet (6) through the gap to form a flue gas heat exchange channel (7). 3. The heat exchange structure of the glass melting furnace waste heat boiler as claimed in claim 2, characterized in that: the plate-shaped support (9) at the outlet end of the air inlet pipe group and the plate-shaped support (9) at the air inlet end of the air outlet pipe group ) is located on the same side of the housing (1), and a cavity is provided between the inner wall of the housing (1), and the cavity forms an air duct (8) for gas flow in the air inlet pipe group and the air outlet pipe group. 4. The heat exchange structure of the glass melting furnace waste heat boiler according to claim 1, characterized in that: a fan is connected between the air outlet of the air outlet pipe group (4) and the glass melting furnace. 5. The heat exchange structure of the waste heat boiler of a glass melting furnace according to claim 1, wherein the air inlet pipe group is located below the air outlet pipe group.