An energy-saving and environment-friendly ignition method for pyrite acid-making fluidized furnace

A fluidized bed furnace and pyrite technology, applied in chemical instruments and methods, sulfur compounds, sustainable manufacturing/processing, etc., can solve the problems of long ignition time, high diesel consumption, air pollution, etc., and achieve short ignition time and environmental pollution Effect of small size and reduced diesel consumption

Active Publication Date: 2019-01-15
襄阳泽东化工集团股份有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies such as long ignition time, high diesel consumption, high-temperature scarring, and serious air pollution of existing pyrite acid-making fluidized furnaces, and provide an energy-saving and environmentally friendly new ignition method for pyrite acid-making fluidized furnaces.

Method used

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Embodiment Construction

[0016] In order to enable those skilled in the art to fully understand the technical solutions and beneficial effects of the present invention, further description will be given below in conjunction with specific examples. The protection scope of the present invention is not limited to the following examples.

[0017] The energy-saving and environment-friendly ignition method provided by the present invention has been successfully applied in the fluidized furnace of the company's 200,000-ton / year pyrite acid plant. The fluidized furnace has a diameter of 9.6m, a height of 21.5m, and a roasting area of ​​22.9m 2 . The specific ignition steps are as follows:

[0018] Step 1 Preparation tools: prepare a galvanized pipe with a length of 6.5m, Ф25, and a 90° bend at the front section of 200mm, two furnace rakes and shovels, 30Kg of diesel oil, 50Kg of cotton yarn, and 5-10 tons of granular sulfur with a particle size of 3-5mm before ignition. , red slag (the lower the moisture co...

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Abstract

The invention discloses an energy-saving eco-friendly ignition method of a pyrite-based acid making fluidized bed furnace. The method utilizes an acid making raw material sulphur as ignition fuel and pyrite-based acid making red slag and diesel oil as auxiliary ignition materials and comprises igniting two oil guns in a furnace, after all sulphur in the hearth burns and produces blue and yellow flames with height of about 10cm, observing a boiling state in the furnace and bottom temperature cases, timely adjusting air quantity and an ore use amount, after the fixed bed temperature is increased to about 650-700 DEG C, adding pyrite into the furnace and gradually stopping sulphur addition, wherein when the furnace bottom temperature is higher than 800 DEG C, fluidized bed furnace combustion is a normal state so that ignition is successful. The method has a time interval of less than 1h between fluidized bed furnace ignition and gas feeding and after about 3h, the furnace temperature is basically normal. The whole ignition process has short time consumption and less oil consumption and reduces waste gas discharge so that environment pressure is relieved and an operation environment is improved. The method has obvious energy saving effects and environmental and social benefits.

Description

technical field [0001] The invention relates to the technical field of fluidized-bed furnace combustion, in particular to an energy-saving and environment-friendly novel method for igniting a fluidized-bed furnace for sulfuric acid production. Background technique [0002] In the production process of sulfuric acid from pyrite ore, boiling furnace is usually used to prepare sulfur dioxide by roasting pyrite ore. In the prior art, diesel ignition technology is mainly adopted for restarting the fluidized fluidized furnace after new construction or overhaul. Diesel is used as fuel to raise the temperature. When the boiling layer temperature reaches about 700°C, pyrite is added to raise the furnace temperature and ventilate. However, this ignition technology has disadvantages such as long ignition time and high diesel consumption. In addition, a large amount of sulfur dioxide and oily black smoke will be evacuated during the ignition and heating process, polluting the surroundin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/52C01B17/74
CPCC01B17/52C01B17/74Y02P20/10
Inventor 赵俊华冯红军冯迎军李丽许倩
Owner 襄阳泽东化工集团股份有限公司
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