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Kiln system and method for firing ceramsite containing calorific value raw materials and producing waste heat as byproduc

A calorific value and ceramsite technology, which is applied in the kiln system field of ceramsite firing and by-product waste heat, can solve the problems of over-burning of raw meal balls, high energy consumption, and large heat loss, etc., and achieve the expansion of the range of raw materials and extensive Application prospects, the effect of low comprehensive energy consumption

Active Publication Date: 2021-06-01
SHANDONG ECON ENERGY SAVING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the rotary kiln is used to fire the ceramsite, which is environmentally friendly and the temperature can be adjusted. However, the heating is carried out from the kiln head, and the hot air is discharged from the kiln tail. It is not determined according to the material heating requirements, and the filling rate is only 10% of the kiln volume, with low thermal efficiency, high energy consumption, and low output; while the ceramsite fired by the sintering machine is an internal combustion heating method, and the product types are mostly low-end products , and the ceramsite is exposed to the air during the firing process, the heat loss is large, and the yield is low
[0003] In addition, solid waste with calorific value is usually used in the industrial calcination process, but in the above two ceramsite firing processes, the sintering progress, temperature, and air volume of the raw balls cannot be adjusted during the sintering process, and neither can the raw materials. Add a large amount of solid waste with calorific value as raw material
In the rotary kiln process, components containing carbon or high organic matter cannot be completely burned or pyrolyzed during the firing process, and enter the firing stage, thus forming black cores, resulting in performance decline; in the sintering machine process, Too high calorific value leads to overburning, bonding or deformation of the raw meal balls, and the product performance is difficult to guarantee

Method used

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  • Kiln system and method for firing ceramsite containing calorific value raw materials and producing waste heat as byproduc
  • Kiln system and method for firing ceramsite containing calorific value raw materials and producing waste heat as byproduc
  • Kiln system and method for firing ceramsite containing calorific value raw materials and producing waste heat as byproduc

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Experimental program
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Embodiment 1

[0027] This embodiment provides a kiln system for firing ceramsite containing calorific value raw materials and by-product waste heat, wherein the kiln is a static roasting tunnel kiln or a belt roaster. In this embodiment, a tunnel kiln is taken as an example for description, and the following description is also applicable to a belt roaster.

[0028] like figure 1 As shown, the tunnel kiln system includes a fully enclosed kiln body composed of a drying section, a decarburization section 3, a preheating section 4, a firing section 5, a soaking section 6, and a cooling section, and the settings of each section of the kiln wherein, the decarburization section 3 includes an ignition zone, a hot air combustion / pyrolysis zone and a waste heat recovery pipeline 19.

[0029] The drying section is divided into a blast drying section 1 and a suction drying section 2, which are respectively connected with a first flue gas treatment system 14 and a second flue gas treatment system 16 ....

Embodiment 2

[0044] This embodiment provides a kiln system for firing ceramsite containing calorific value raw materials and by-product waste heat, wherein the kiln is a static roasting tunnel kiln or a belt roaster. In this embodiment, a tunnel kiln is taken as an example for description, and the following description is also applicable to a belt roaster.

[0045] like figure 2 As shown, the kiln system provided in this embodiment is the same as the segmented state of embodiment 1, the difference is:

[0046] The heat of the ignition zone of the decarburization section 3 comes from the burner arranged above the ignition zone, and the heat-containing raw materials and organic components in the raw meal balls are ignited through the burner, Reach the ignition point; the ignition zone introduces the preheated air from the cooling section at the same time, so as to realize the full combustion of natural gas at the burner and provide a sufficient heat source for ignition; the ignition zone o...

Embodiment 3

[0051] This embodiment provides a kiln system for firing ceramsite containing calorific value raw materials and by-product waste heat, wherein the kiln is a static roasting tunnel kiln or a belt roaster. In this embodiment, a tunnel kiln is taken as an example for description, and the following description is also applicable to a belt roaster.

[0052] like image 3 As shown, the kiln system provided by this embodiment is the same as the segmented state of embodiment 1, the difference is:

[0053] The hot air in the blast drying section 1 comes from the hot air obtained by mixing the hot air in the firing section 5 and the soaking section 6 with the cold air and cooling down; the hot air in the draft drying section comes from the firing section 5 .

[0054] The heat of the ignition zone of the decarburization section comes from the burner arranged above the ignition zone, through which the heat value-containing raw materials and organic components in the raw meal balls are ig...

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Abstract

The invention provides a kiln system and a method for firing ceramsite containing calorific value raw materials and producing waste heat as a byproduct, and belongs to the field of ceramic product firing and kilns. The kiln system comprises a drying section, a preheating section, a sintering section, a soaking section and a cooling section, and further comprises a decarburization section arranged between the drying section and the preheating section; the decarburization section comprises an ignition area, a hot air combustion / pyrolysis area and a waste heat recovery pipeline, a heat source is introduced into an ignition area, so that the temperature of the ceramsite containing the calorific value raw materials in the area is 400-900 DEG C, and the hot air combustion / pyrolysis area is used for combustion or pyrolysis of carbon-containing materials and organic components in the calorific value raw materials in the ceramsite; and a waste heat recovery pipeline is used for discharging the decarburized flue gas and recovering heat released after combustion / pyrolysis of the ceramsite raw material containing heat value in the flue gas. According to the method, the raw material range of the ceramsite is expanded, ceramsite black cores and quality reduction caused by high-mixing-amount and high-calorific-value solid waste are avoided, meanwhile, decarburization heat is recycled and utilized, and the method is low in comprehensive energy consumption, balanced in temperature control and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of pottery firing and kilns, and in particular relates to a kiln system and method for firing ceramsite as a raw material with calorific value and by-product waste heat. Background technique [0002] As an important building material and refractory material, ceramsite is usually fired by rotary kiln or sintering machine. Among them, the rotary kiln is used to fire the ceramsite, which is environmentally friendly and the temperature can be adjusted. However, the heating is carried out from the kiln head, and the hot air is discharged from the kiln tail. It is not determined according to the material heating requirements, and the filling rate is only 10% of the kiln volume, with low thermal efficiency, high energy consumption, and low output; while the ceramsite fired by the sintering machine is an internal combustion heating method, and the product types are mostly low-end products , and the ceramsite is exposed to th...

Claims

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Application Information

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IPC IPC(8): F27B9/12F27B9/26F27B9/30F27D17/00
CPCF27B9/12F27B9/262F27B9/3005F27B9/30F27D17/004F27B2009/122F27B2009/124F27B2009/3088F27M2001/1508F27M2003/04F27D2017/005
Inventor 李宇姚长青
Owner SHANDONG ECON ENERGY SAVING TECH
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