Waste gas treatment system for dolomite sand calcination rotary kiln

A waste gas treatment and dolomite sand technology, which is applied in waste heat treatment, lighting and heating equipment, furnace components, etc., can solve problems such as direct discharge, high temperature of waste gas, and large dust content, so as to reduce operating costs and improve economic benefits , the effect of prolonging the use time

Pending Publication Date: 2020-11-10
新疆凯盛建材设计研究院(有限公司)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the dolomite raw ore particles are calcined into dolomite sand at high temperature in the rotary kiln, the waste gas at the tail end of the rotary kiln has the problems of high temperature, high dust content, high concentration of sulfur dioxide and nitrogen oxides, and cannot be discharged directly

Method used

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  • Waste gas treatment system for dolomite sand calcination rotary kiln

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, this embodiment provides a dolomite sand calcination rotary kiln exhaust gas treatment system, including a kiln tail smoke chamber, an air cooler, a desulfurization device, a high-temperature dust collection device, a denitrification device, an exhaust fan, and a chimney; the kiln tail smoke The chamber inlet is connected to the above-mentioned rotary kiln, the outlet of the above-mentioned kiln tail smoke chamber is connected to the above-mentioned air cooler, and the above-mentioned air cooler is connected to a cooling fan through an air pipe, and the outlet of the above-mentioned air cooler is connected to the above-mentioned desulfurization device, and the above-mentioned desulfurization device is connected to a Desulfurization agent injector, the outlet of the desulfurization device is connected to the above-mentioned high-temperature dust collection device, the outlet of the above-mentioned high-temperature dust collection device is conne...

Embodiment 2

[0026] This embodiment provides a process for treating waste gas using the dolomite sand calcined rotary kiln waste gas treatment system in Example 1:

[0027] The waste heat flue gas with a temperature of 450-500°C enters the kiln tail smoke chamber through the tail of the rotary kiln, and after settling part of the large particle dust, it enters the air cooler through the pipeline. -400℃, the cooled flue gas is discharged from the top of the air cooler, and enters the desulfurization device through the pipeline. Enter the dry desulfurization device for desulfurization reaction, form desulfurization gypsum and settle into the ash hopper to collect or enter the high-temperature dust removal device with the flue gas to collect dust. The temperature of the flue gas after dust collection is 330-380°C, and the dust concentration is less than 10mg / m 3 , the flue gas after dust collection and purification enters the denitrification device, and the denitrification adopts the selectiv...

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Abstract

The invention discloses a waste gas treatment system for a dolomite sand calcination rotary kiln. The waste gas treatment system comprises a kiln tail smoke chamber, an air cooler, a desulfurization device, a high-temperature dust collection device, a denitration device, an exhaust fan and a chimney which are connected in sequence. According to the waste gas treatment system for the dolomite sandcalcination rotary kiln, after high-temperature flue gas calcined by the rotary kiln is cooled, dry desulfurization is firstly adopted, then high-temperature dust removal is carried out, and then denitration is carried out through a selective catalytic reduction method, so that desulfurization, dust removal and denitration of waste gas discharged from the rotary kiln are realized, and the waste gas is discharged through the exhaust fan and the chimney after the concentration of pollutants in the waste gas reaches the standard; and the pollutant emission concentration of the waste heat flue gaspurified by the system disclosed by the invention can meet the most strictest atmospheric pollutant special emission limit value requirement in Inorganic Chemical Industry Pollutant Emission Standard(GB31573-2015).

Description

technical field [0001] The invention relates to the technical field of dolomite sand production, in particular to a dolomite sand calcining rotary kiln waste gas treatment system. Background technique [0002] Dolomite is an important calcium and magnesium resource. It has extremely rich reserves in my country. The main components of dolomite are calcium carbonate and magnesium carbonate. Turned into crystalline CaO, the structure is dense, the refractoriness can reach 2300°C, and the slag resistance is strong, so it can be used as a raw material for refractory materials. After the dolomite raw ore particles are calcined into dolomite sand by high temperature in the rotary kiln, the waste gas at the tail end of the rotary kiln has the problems of high temperature, high dust content, high concentration of sulfur dioxide and nitrogen oxides, and cannot be discharged directly. [0003] Therefore, during the calcination process of dolomite sand, it is necessary to purify the was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00B01D53/75B01D53/83B01D53/50B01D53/86
CPCB01D53/508B01D53/75B01D53/83B01D53/8631F27D17/00F27D17/008Y02P10/25
Inventor 黄新江陆军李洪洲张安平邵杰孙传毅其他发明人请求不公开姓名
Owner 新疆凯盛建材设计研究院(有限公司)
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