CN201935557U - Regenerative combustion furnace - Google Patents

Abstract

The utility model relates to a combustion furnace used for smelting and processing nonferrous metals, in particular to a regenerative combustion furnace. It includes a smelting pot, the outer part of the smelting pot is equipped with a furnace body, and a circulating air duct is set between the smelting pot and the furnace body; a heat storage burner is installed at the outlet of the circulating air duct, and the heat storage burner is connected with a control valve; the heat storage The burners are all connected with the reversing valve, and the reversing valve is connected with the blower and the induced draft fan; the control valves are all arranged on the fuel delivery pipeline. The utility model has a simple structure. The regenerative burner is placed at the outlet of the circulating air duct, and the gas and air are mixed in the regenerative burner before entering the furnace, so that it has the combustion conditions before entering the furnace. It is more fully mixed with air, has high thermal efficiency and low fuel consumption; the utility model fully recovers and utilizes the waste heat in the combustion furnace, has a high recovery rate, saves energy, improves the thermal efficiency of thermal equipment, reduces harmful gas emissions, and makes the furnace body Even heating, prolonging the service life of the combustion furnace.

Description

Regenerative combustion furnace

technical field

The utility model relates to a combustion furnace used for smelting and processing nonferrous metals, in particular to a regenerative combustion furnace.

Background technique

At present, in the process of smelting or processing non-ferrous metals such as tin, lead, aluminum, copper, etc., combustible gas or liquid is used as fuel, which requires a lot of heat energy and takes a long time to burn. Fuel and capital consumption are large, and most of the waste heat is discharged in vain, which is a serious waste. At present, although "regenerative burners" have appeared on the market, traditional regenerative burners mix gas and air after entering the furnace. Due to the extremely high temperature in the furnace, the mixing effect of the two is low. Insufficient combustion, low thermal efficiency, high fuel consumption, and insignificant recycling rate of waste heat.

Contents of the invention

The utility model aims at the deficiencies in the prior art, and provides a regenerative combustion furnace with high thermal efficiency, low fuel consumption and high waste heat recovery rate.

The technical solution adopted to achieve the above purpose is: a regenerative combustion furnace, including a smelting pot, a furnace body is set outside the smelting pot, and a circulating air duct is arranged between the smelting pot and the furnace body; the outlet of the circulating air duct There are regenerative burners at each place, and each regenerative burner is connected with its own control valve; the regenerative burners are connected with the reversing valve, and the reversing valve is connected with the blower and the induced draft fan; the control valves are all set at On the fuel delivery pipeline connected to the regenerative burner.

Control valves include ignition electric valves and fuel shutoff valves.

An exhaust gas temperature transmitter is arranged on the pipeline connecting the reversing valve and the induced draft fan; an air volume regulating valve is arranged on the pipeline connecting the reversing valve and the blower.

Compared with the prior art, the utility model has a simple structure. The regenerative burner is placed at the outlet of the circulating air duct, and the gas and air are mixed in the regenerative burner before entering the furnace, so that the gas and air are mixed before entering the furnace. The combustion conditions are met, so that the fuel and air are mixed more fully, the thermal efficiency is high, and the fuel consumption is low; the utility model fully recycles the waste heat in the combustion furnace according to the principle of the regenerative burner, and has a high recovery rate and saves energy. Energy, improve the thermal efficiency of thermal equipment, reduce the emission of harmful gases, make the heating temperature of the furnace body uniform, and prolong the service life of the combustion furnace.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

In the figure: smelting pot 1, furnace body 2, circulating air duct 3, No. 2 regenerative burner 4, No. 2 ignition gun 5, No. 2 ignition electric valve 6, reversing valve 7, No. 2 fuel cut-off valve 8, air volume Regulating valve 9, fuel regulating valve 10, fuel delivery pipe 11, blower 12, No. 1 fuel cut-off valve 13, exhaust gas temperature transmitter 14, No. 1 electric ignition valve 15, No. Mouth 17, induced draft fan 18.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Referring to accompanying drawing 1, the regenerative combustion furnace disclosed by the utility model uses combustible gas or combustible liquid as fuel, and is used as heating equipment in the smelting and processing of tin, lead, aluminum, copper and other non-ferrous metals. In this embodiment, there are two regenerative burners and two control valves, which are relatively arranged at the two outlets of the circulating air duct. Connect to realize digital control.

This regenerative combustion furnace includes a smelting pot 1, a furnace body 2 is set on the outside of the smelting pot 1, and a circulating air duct 3 is arranged between the smelting pot 1 and the furnace body 2. The outlets of the circulating air duct 3 are respectively provided with regenerative burners, including the No. 1 regenerative burner 17 and the No. 2 regenerative burner 4. The regenerative burners are also respectively provided with ignition guns connected to them, that is, the No. 1 regenerative burner. Ignition gun 16 and No. 2 ignition gun 5, each regenerative burner is connected with respective control valve respectively. No. 1 regenerative burner 17 and No. 2 regenerative burner 4 are connected with reversing valve 7 , and reversing valve 7 is connected with air blower 12 and induced draft fan 18 . The control valves are all set on the fuel delivery pipeline 11 connected to the regenerative burner, and the fuel delivery pipeline 11 is divided into two branches: one is directly connected to the regenerative burner through the ignition electric valve; the other branch is provided with a fuel regulating valve 10. The pipelines passing through the fuel regulating valve 10 are respectively connected to the regenerative burner after passing through the fuel cut-off valve.

The control valves include the ignition electric valve and the fuel cut-off valve, which are divided into No. 1 ignition electric valve 15, No. 1 fuel cut-off valve 13, No. 2 ignition electric valve 6, and No. 2 fuel cut-off valve 8 according to the connected regenerative burners. .

An exhaust gas temperature transmitter 14 is arranged on the pipeline connecting the reversing valve 7 and the induced draft fan 18 ; an air volume regulating valve 9 is arranged on the pipeline connecting the reversing valve 7 and the blower 12 .

The working principle of the utility model is:

The metal to be smelted is placed in the smelting pot 1, and the smelting pot 1 is installed inside the furnace body 2, and a circulating air duct 3 is set between the two, and two regenerative burners 4, 17 are installed in front of the furnace body 2, and the circulating air The outlet of channel 3 is composed of fuel cut-off valves 8, 13, reversing valve 7, air volume regulating valve 9, fuel regulating valve 10, exhaust gas temperature transmitter 14, ignition electric valves 6 and 15, ignition guns 5 and 16 Fuel combustion control system and realize heat storage and reversing function. The No. 1 ignition electric valve 15 and the No. 1 ignition gun 16 are used to ignite the No. 1 regenerative burner 17. After the main flame of the burner is ignited, the No. 1 fuel cut-off valve 13 is in an open state. Similarly, the No. 2 ignition electric valve 6 And the No. 2 ignition gun 5 is used to ignite the No. 2 regenerative burner 4. After the main flame of the burner is ignited, the No. 2 fuel cut-off valve 8 is in an open state, and the fuel regulating valve 10 is adjusted according to the temperature of the hot air. The regulating valve 9 and the fuel regulating valve 10 adjust the opening in a certain ratio, so that the fuel and air are mixed in the regenerative burner before entering the furnace body, and then enter the furnace body, which makes the fuel and air Mix well, increase combustion rate and save energy.

When the regenerative combustion furnace is in operation, when the No. 1 regenerative burner 17 is burning, the No. 2 regenerative burner 4 is in the state of exhausting and storing heat. At this time, the reversing valve 7 makes the No. 1 regenerative burner 17 in the drum In the wind state, the No. 2 regenerative burner 4 is in the air-inducing state. Since the No. 2 regenerative burner 4 stores the flue gas sensible heat of the No. 1 regenerative burner 17 during operation, the exhaust gas temperature can be reduced to the allowable limit stage. At the same time, when the burner turns into a combustion state, the air The stored heat is converted into the sensible heat of the air through the regenerative burner, which is used to burn the air distribution and increase the temperature of the air distribution, thereby saving fuel and reducing smoke exhaust. Conversely, when the exhaust gas temperature transmitter 14 reaches the set reversing temperature, the reversing valve 7 will automatically reversing. At this time, the No. In hot state, at this time, the reversing valve 7 makes the No. 2 regenerative burner 4 be in the blowing state, and the No. 1 regenerative burner 17 is in the air-inducing state. Similarly, No. 1 regenerative burner 17 saves the flue gas sensible heat during operation of No. 2 regenerative burner 4, and when the medium air is applied to No. 1 regenerative burner 17 in the recombustion state, the reversing combustion is carried out like this. Due to the use of heat storage technology, this combustion furnace achieves the dual purpose of extreme energy saving and extreme reduction of NOx emissions. The regenerators in the regenerative burners on both sides of the combustion furnace body alternately burn and exhaust smoke, and the high-speed airflow makes the gas in the furnace have a strong mixing effect. The main flow direction of the airflow in the furnace is from one side to the other, and the direction is constantly changing, thereby expanding the flame burning area, and the boundary of the flame is almost extended to the boundary of the furnace, so that the temperature in the furnace is uniform. The service life of the heating furnace is extended.

Claims (3)

1. a heat storage type combustion stove comprises and smelts pot, and the outer cover of smelting pot is equipped with body of heater, it is characterized in that, is provided with circulation air path between described smelting pot and the body of heater; The exit of circulation air path is respectively arranged with heat-accumulating burner, and each heat-accumulating burner is connected with separately by-pass valve control respectively; Heat-accumulating burner all is connected with reversal valve, and reversal valve is connected with air-introduced machine with air blast; On the fuel tube that described by-pass valve control all is arranged on heat-accumulating burner is connected.

2. heat storage type combustion stove according to claim 1 is characterized in that, described by-pass valve control comprises igniting motor-driven valve and fuel cutoff valve.

3. heat storage type combustion stove according to claim 1 is characterized in that the pipeline that described reversal valve is connected with air-introduced machine is provided with the exhaust gas temperature transmitter; The pipeline that reversal valve is connected with air blast is provided with volume damper.

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