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Preparation device and preparation method of sodium pyrosulfite and anhydrous sodium sulphite

A technology of anhydrous sodium sulfite and sodium pyrosulfite, which is applied in the field of boiling furnace preparation technology, can solve problems such as rising production costs, rising prices, and fierce market competition, and achieve the effects of low production costs and improved utilization rates

Inactive Publication Date: 2012-09-12
伍立君
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Problems solved by technology

As an important chemical raw material, sulfuric acid is widely used in various fields of industry and people's livelihood. However, the manufacturing technology of sulfuric acid is very mature, and there are many manufacturers with production capacity. Although the entire market is huge, its market competition is also very fierce. , and the current production of sodium metabisulfite and anhydrous sodium sulfite is also increasing in price, resulting in rising production costs

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  • Preparation device and preparation method of sodium pyrosulfite and anhydrous sodium sulphite
  • Preparation device and preparation method of sodium pyrosulfite and anhydrous sodium sulphite

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Embodiment Construction

[0019] see figure 1 As shown, the present invention provides a preparation device and preparation method of sodium metabisulfite and anhydrous sodium sulfite. The production device includes a roasting system, a sodium pyrosulfite production system and an anhydrous sodium sulfite production system respectively connected to the roasting system.

[0020] The roasting system includes a fluidized fluidized furnace connected in sequence through pipelines, a cooling device connected to the fluidized fluidized furnace, a purification device connected to the cooling device, a demisting device connected to the purification device, and an air supply device connected to the fluidized fluidized furnace to deliver air into the fluidized fluidized furnace . Wherein, the demisting device is respectively connected to the sodium pyrosulfite production system and the anhydrous sodium sulfite production system through pipelines, and the fluidized furnace is used to accommodate sulfur-containing ...

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Abstract

The invention provides a preparation device of sodium pyrosulfite and anhydrous sodium sulphite, comprising a roasting system, a sodium pyrosulfite preparation system and an anhydrous sodium sulphite preparation system, wherein the sodium pyrosulfite preparation system and the anhydrous sodium sulphite preparation system are respectively connected with the roasting system. A preparation method comprises the following steps: first carrying out fluidized roasting on pyrite powder to let sulfur in the powder be oxidized by the air to SO2 and to produce SO2 as a gas, and carrying out a range of processes such as dedusting purification and alkali absorption on the furnace gas to produce sodium pyrosulfite and anhydrous sodium sulphite. The main component of the roasting slag is iron oxide, and is directly sold to building materials factories or cement mills. According to the invention, the utilization rate of pyrite resource is raised, the production cost is simultaneously reduced, and the advantage of environmental protection is achieved.

Description

【Technical field】 [0001] The invention relates to a fluidized furnace preparation process, in particular to a method for preparing sodium pyrosulfite and anhydrous sodium sulfite by utilizing the fluidized furnace roasting technology. 【Background technique】 [0002] Fluidized roaster is referred to as fluidized bed roaster, also known as fluidized bed roaster, which is a device for roasting sulfide ore with solid fluidization technology. The sulfur dioxide gas finally produced is mainly used to make sulfuric acid, and slag is used as metallurgical raw material. For example, Chinese Invention Patent No. 200810049430.7 discloses a method for producing sulfuric acid by roasting in a fluidized furnace, which first produces sulfur dioxide through a fluidized furnace, and then uses sulfur dioxide as a raw material to produce sulfuric acid. As an important chemical raw material, sulfuric acid is widely used in various fields of industry and people's livelihood. However, the manufac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/14
Inventor 伍立君
Owner 伍立君
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