Method for converting to hot air from flue gas in baking furnace
A roasting furnace, hot air technology, applied in heat exchanger types, direct contact heat exchangers, furnaces, etc., can solve problems such as ineffective utilization of waste heat resources, waste heat waste, and reduction in the amount of coal-fired supplements, to reduce The effect of coal-fired supplementary amount, energy saving, and meeting the needs of flue gas treatment process
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[0016] Example 1:
[0017] As shown in Figure 1, the specific steps of the present invention are as follows:
[0018] Step 1: Hot flue gas is introduced into the heat exchanger
[0019] The temperature of the hot flue gas 1 produced by the roasting furnace is 680℃, and the flue gas volume is 30000m 3 / h, the hot flue gas 1 is introduced from the bottom of the heat exchanger 2 under the action of a high-temperature induced draft fan, and the dust contained in the hot flue gas returns to the roasting system through the gravity settling chamber and the overflow spiral 3;
[0020] Step 2: Supply cold air to the heat exchanger
[0021] The temperature of the cold air 4 supplied to the heat exchanger is 20°C, and the supply of cold air is 28000m 3 / h, the cold air 4 is fed from the upper part of the heat exchanger and forms a three-stage countercurrent heat exchange form with the hot flue gas for heat exchange;
[0022] Step 3: Hot swap
[0023] The hot flue gas 1 is fed in from the bot...
Example Embodiment
[0025] Example 2:
[0026] As shown in Figure 1, the specific steps of the present invention are as follows:
[0027] Step 1: Hot flue gas is introduced into the heat exchanger
[0028] The temperature of the hot flue gas 1 produced by the roasting furnace is 700℃, and the flue gas volume is 32000m 3 / h, the hot flue gas 1 is introduced from the bottom of the heat exchanger 2 under the action of a high-temperature induced draft fan, and the dust contained in the hot flue gas returns to the roasting system through the gravity settling chamber and the overflow spiral 3;
[0029] Step 2: Supply cold air to the heat exchanger
[0030] The temperature of the cold air 4 supplied to the heat exchanger is 20°C, and the supply of cold air is 30000m 3 / h, the cold air 4 is fed from the upper part of the heat exchanger and forms a three-stage countercurrent heat exchange form with the hot flue gas for heat exchange;
[0031] Step 3: Hot swap
[0032] The hot flue gas 1 is fed in from the bot...
Example Embodiment
[0034] Example 3:
[0035] As shown in Figure 1, the specific steps of the present invention are as follows:
[0036] Step 1: Hot flue gas is introduced into the heat exchanger
[0037] The temperature of hot flue gas 1 produced by the roaster is 720℃, and the flue gas volume is 33000m 3 / h, the hot flue gas 1 is introduced from the bottom of the heat exchanger 2 under the action of a high-temperature induced draft fan, and the dust contained in the hot flue gas returns to the roasting system through the gravity settling chamber and the overflow spiral 3;
[0038] Step 2: Supply cold air to the heat exchanger
[0039] The temperature of the cold air 4 supplied to the heat exchanger is 20°C, and the cold air supply volume is 30500m 3 / h, the cold air 4 is fed from the upper part of the heat exchanger and forms a three-stage countercurrent heat exchange form with the hot flue gas for heat exchange;
[0040] Step 3: Hot swap
[0041] The hot flue gas 1 is fed in from the bottom of th...
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