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Method for converting to hot air from sand baked in baking furnace

A hot air, roasting furnace technology, applied in the direction of heat exchanger types, direct contact heat exchangers, furnaces, etc., can solve the problems of ineffective utilization of calcining waste heat in calcining furnaces, low enterprise economic benefits, and high production costs, To achieve the effect of small investment, improved economic efficiency of enterprises, and short heat exchange time

Active Publication Date: 2009-01-14
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for converting calcination into hot air in a calcination furnace, which solves the problems that the waste heat of calcination in a calcination furnace cannot be effectively utilized, energy is wasted, production costs are high, and economic benefits of enterprises are low.

Method used

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  • Method for converting to hot air from sand baked in baking furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] as attached figure 1 Shown, concrete steps of the present invention are as follows:

[0017] Step 1: Calcined sand feeds into the gas-solid heat exchanger

[0018] The calcined sand temperature produced by the roasting furnace is 680°C, and the calcined sand amount is 25t / h. The calcined sand 1 is fed into the gas-solid heat exchanger 3 through the high-temperature air delivery chute, and is used as a fluidized bed material for heat exchange;

[0019] Step 2: Air is fed into the air-solid heat exchanger

[0020] The air 2 is fed into the air chamber of the air-solid heat exchanger 3 through the Roots blower, and is used as the air source of the fluidized bed. The air temperature is usually the outdoor air temperature of 20°C, and the air volume is 15000m 3 / h;

[0021] Step 3: Gas-Solid Heat Exchange

[0022] The calcined sand 1 fed into the air-solid heat exchanger 3 forms a fluidized bed under the blowing force of the air 2, and the air 2 directly contacts the cal...

Embodiment 2

[0025] as attached figure 1 Shown, concrete steps of the present invention are as follows:

[0026] Step 1: Calcined sand feeds into the gas-solid heat exchanger

[0027] The calcined sand produced by the roasting furnace has a temperature of 700°C and a calcined sand amount of 34t / h. The calcined sand 1 is fed into the gas-solid heat exchanger 3 through a high-temperature air delivery chute, and is used as a fluidized bed material for heat exchange;

[0028] Step 2: Air is fed into the air-solid heat exchanger

[0029] The air 2 is fed into the air chamber of the air-solid heat exchanger 3 through the Roots blower, and is used as the air source of the fluidized bed. The air temperature is usually the outdoor air temperature of 20°C, and the air volume is 20,000m 3 / h;

[0030] Step 3: Gas-Solid Heat Exchange

[0031] The calcined sand 1 fed into the air-solid heat exchanger 3 forms a fluidized bed under the blowing force of the air 2, and the air 2 directly contacts the c...

Embodiment 3

[0034] as attached figure 1 Shown, concrete steps of the present invention are as follows:

[0035] Step 1: Calcined sand feeds into the gas-solid heat exchanger

[0036] The calcined sand produced by the roasting furnace has a temperature of 720°C and a calcined sand amount of 42t / h. The calcined sand 1 is fed into the gas-solid heat exchanger 3 through a high-temperature air delivery chute, and is used as a fluidized bed material for heat exchange;

[0037] Step 2: Air is fed into the air-solid heat exchanger

[0038] The air 2 is fed into the air chamber of the air-solid heat exchanger 3 through the Roots blower, and is used as the air source of the fluidized bed. The air temperature is usually the outdoor air temperature of 20°C, and the air volume is 20,000m 3 / h;

[0039] Step 3: Gas-Solid Heat Exchange

[0040] The calcined sand 1 fed into the air-solid heat exchanger 3 forms a fluidized bed under the blowing force of the air 2, and the air 2 directly contacts the c...

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Abstract

This invention relates to a method for converting calcines of calcining furnaces to hot air including feeding hot calcines into a gas-solid heat exchanger and feeding cold air into the exchanger for heat exchange then to quench the cooled calcines in water and return the hot air to a dry mill flow for circulation, which is advantaged that full contact between hot material and cold air is realized, so the speed of heat exchange is quick and efficiency is high, and waste heat is converted to hot air used in circulation so as to save energy of waste heat.

Description

technical field [0001] The invention relates to a method for utilizing waste heat, in particular to a method for converting calcined sand into hot air in a roasting furnace. Background technique [0002] As we all know, most of the hot calcined sand produced by the roaster is converted into hot water by a slag cooler, and some use tubes for air heat exchange. However, due to heat exchange efficiency and other reasons, the heat exchange area is large, and the process, The equipment is all relatively complicated, and the investment is relatively large, which is not conducive to industrial development and utilization, and needs to be improved urgently. Contents of the invention [0003] The purpose of the present invention is to provide a method for converting calcination into hot air in a calcination furnace, which solves the problems of ineffective utilization of waste heat of calcination in a calcination furnace, waste of energy, high production costs, and low economic ben...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28C3/12F27D17/00
CPCY02P10/25
Inventor 张清波汪丹鲁玉春谷志君
Owner CHANGCHUN GOLD RES INST