WO2023101643A1 - Improvement in a vertical kiln - Google Patents

Improvement in a vertical kiln Download PDF

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Publication number
WO2023101643A1
WO2023101643A1 PCT/TR2022/051243 TR2022051243W WO2023101643A1 WO 2023101643 A1 WO2023101643 A1 WO 2023101643A1 TR 2022051243 W TR2022051243 W TR 2022051243W WO 2023101643 A1 WO2023101643 A1 WO 2023101643A1
Authority
WO
WIPO (PCT)
Prior art keywords
plants
calcination
hot water
improvement
product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/TR2022/051243
Other languages
French (fr)
Inventor
Cemal Ünlü
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US18/707,070 priority Critical patent/US20250003681A1/en
Priority to EP22901952.6A priority patent/EP4440733A4/en
Priority to CA3236967A priority patent/CA3236967A1/en
Publication of WO2023101643A1 publication Critical patent/WO2023101643A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/22—Arrangements of heat-exchange apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10—Arrangements for using waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10—Arrangements for using waste heat
    • F27D17/17—Arrangements for using waste heat for preheating fluids, e.g. air or gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20—Arrangements for treatment or cleaning of waste gases
    • F27D17/28—Arrangements for treatment or cleaning of waste gases for cooling waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
    • B01J6/001—Calcining

Definitions

  • the invention relates to the improvement in a vertical kiln designed for the calcination and/or calcination in industrial plants operating in the mining sector
  • the process that is indispensable in industrial gypsum, lime, cement etc. plants is carried out by calcination and/or drying kilns
  • the invention relates to the improvement in vertical kilns designed for use in calcination and/or drying processes in industrial plants operating in the mining sector.
  • the simplest way to remove the physically bound water in the concentrate is to heat the materials to a temperature (drying) above the evaporation temperature of water. Evaporation of water is an endothermic process (+ 44 kJ/mol); therefore, energy is required to heat the minerals to the desired temperature and during evaporation. Calcination is referred to as mineral chemical disintegration; and happens when heating the mineral above the disintegration temperature or reducing the partial vapor pressures of the gaseous products to values below the equilibrium vapor pressure during the disintegration reaction at a specified temperature. Calcination takes place in minerals with relatively low decomposition temperature of water, CO2 and other gases chemically bound to metal hydrate and carbonate minerals.
  • Combustion module structures / chambers working with 1 heat furnace (burner) in vertical kiln numbered 2021/012627 (1-1. 1) has been increased to 4 heat furnaces in our invention and the system has been made more efficient in terms of calcination, and the heat exchanger system (3), which has the task of separating the hot water vapor in the product in the system, and it has increased its efficiency by blending the hot water with air and re-introducing the dry and hot air into the system and using this air to preheat the product (preheater chamber) (1- 1.1) and to further reduce fuel consumption.
  • the pure water separated in the heat exchanger system (3.1) can be used as a supplement to other parts of the plant that need pure water.
  • the material enters the machine through the inlet and feedback module on the upper part, hot air is supplied to the machine through the hot air inlet channel on the lower part, and since the vertical operation principle is adopted, movement and transfer, it operates with the fill and discharge method by providing hot air and gas flow without the need for additional energy.
  • preheater module structures/chambers (1) are supported by heat exchanger system (3) for the purpose of evaluating the water vapor coming out of the system and 4-8-12 and more burners (depending on capacity and product) to calcine the general system.
  • heat exchanger system (3) for the purpose of evaluating the water vapor coming out of the system and 4-8-12 and more burners (depending on capacity and product) to calcine the general system.
  • the invention relates to the development of a vertical kiln designed to be used in calcination and/or drying processes in industrial plants operating in the mining sector (construction chemicals plants, calcite production plants, cement plants, lime plants).
  • Preheater module structures/chambers (1-1.1) working with 1 heat furnace (burner) in the vertical furnace numbered 2021/012627 have been increased to 4 heat furnaces in our invention and the system has been made more efficient in terms of calcination
  • the heat exchanger system (3.1) which has the task of separating the hot water vapor in the product in the system, has increased its efficiency by blending the hot water with air and re-introducing dry and hot air into the system (secondary air) and using this air to preheat the product, aiming to further reduce fuel consumption.
  • the pure water separated in the heat exchanger system (3.1) can be used as a supplement to other parts of the plant that need pure water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention relates to the development made in the vertical kiln subject to the application numbered 2021/012627, which is designed to be used in calcination and/or drying processes in industrial plants operating in the mining sector.

Description

IMPROVEMENT IN A VERTICAL KILN
Field of Invention:
The invention relates to the improvement in a vertical kiln designed for the calcination and/or calcination in industrial plants operating in the mining sector
Current State of the Art:
The process that is indispensable in industrial gypsum, lime, cement etc. plants is carried out by calcination and/or drying kilns
Purpose of the Invention:
To reduce the amount of energy consumed in calcination and/or drying processes in industrial plants operating in the mining sector. Our vertical drying kiln is more efficient than its counterparts. It carries out the drying process 40-50% cheaper. Efficiency is also increased with the improvement made in the vertical kiln.
It can also be used in industrial gypsum, lime, cement plants as well as bentonite, asphalt plant, calcite, limestone, dolamite etc. plants
Figures that will help to explain the invention:
Figure 1- Images and parts of the kiln developed
Names of parts in the figure:
1 -Preheating part
1.1 Preheater module structures/chambers
2-Burnerg part
3 -Cooling chute
3.1 Heat exchanger system
Detailed description of the Invention:
The invention relates to the improvement in vertical kilns designed for use in calcination and/or drying processes in industrial plants operating in the mining sector.
The simplest way to remove the physically bound water in the concentrate is to heat the materials to a temperature (drying) above the evaporation temperature of water. Evaporation of water is an endothermic process (+ 44 kJ/mol); therefore, energy is required to heat the minerals to the desired temperature and during evaporation. Calcination is referred to as mineral chemical disintegration; and happens when heating the mineral above the disintegration temperature or reducing the partial vapor pressures of the gaseous products to values below the equilibrium vapor pressure during the disintegration reaction at a specified temperature. Calcination takes place in minerals with relatively low decomposition temperature of water, CO2 and other gases chemically bound to metal hydrate and carbonate minerals. Drying and calcination takes place in rotary kilns, shaft kilns and fluidized bed furnaces. The reasons why water in minerals is undesirable are: (i) removal of water reduces the raw material to be processed; (ii) if the material is to be fed into a furnace that operates at high temperatures, such as an electric arc furnace, the sudden transition of water to the vapor can cause large-scale scattering; (iii) in some cases, materials may become more reactive after removal of water; (iv) the presence of coarse grained limestone causes some undesirable reactions and results in poor product quality and yield.
In industrial applications, the most suitable method for the combustion (disintegration) of coarse-grained limestone is the Vertical Kiln. Our invention is described in the application numbered 2021/012627.
Combustion module structures / chambers working with 1 heat furnace (burner) in vertical kiln numbered 2021/012627 (1-1. 1) has been increased to 4 heat furnaces in our invention and the system has been made more efficient in terms of calcination, and the heat exchanger system (3), which has the task of separating the hot water vapor in the product in the system, and it has increased its efficiency by blending the hot water with air and re-introducing the dry and hot air into the system and using this air to preheat the product (preheater chamber) (1- 1.1) and to further reduce fuel consumption.
In addition, the pure water separated in the heat exchanger system (3.1) can be used as a supplement to other parts of the plant that need pure water.
In the vertical furnace mentioned in the application numbered 2021/012627, the material enters the machine through the inlet and feedback module on the upper part, hot air is supplied to the machine through the hot air inlet channel on the lower part, and since the vertical operation principle is adopted, movement and transfer, it operates with the fill and discharge method by providing hot air and gas flow without the need for additional energy.
In addition to the furnace body, preheater module structures/chambers (1) are supported by heat exchanger system (3) for the purpose of evaluating the water vapor coming out of the system and 4-8-12 and more burners (depending on capacity and product) to calcine the general system. Application to industry
The invention relates to the development of a vertical kiln designed to be used in calcination and/or drying processes in industrial plants operating in the mining sector (construction chemicals plants, calcite production plants, cement plants, lime plants). Advantages and features;
Preheater module structures/chambers (1-1.1) working with 1 heat furnace (burner) in the vertical furnace numbered 2021/012627 have been increased to 4 heat furnaces in our invention and the system has been made more efficient in terms of calcination, and the heat exchanger system (3.1), which has the task of separating the hot water vapor in the product in the system, has increased its efficiency by blending the hot water with air and re-introducing dry and hot air into the system (secondary air) and using this air to preheat the product, aiming to further reduce fuel consumption. In addition to these, the pure water separated in the heat exchanger system (3.1) can be used as a supplement to other parts of the plant that need pure water.
With all these advantages and economic gains, it is also a reason for preference.

Claims

1-The invention relates to an improvement for a vertical kiln designed to be used in calcination and/or drying processes in industrial plants operating in the mining sector (construction chemicals plants, calcite production plants, cement plants, lime plants), comprising of
- a heat exchanger system (3.1), which serves to separate the hot water vapor from the hot water vapor in the product in the system, allowing the hot water to be blended with air and the dry and hot air to be re-introduced into the system and the separated pure water to be used as a supplement to other parts in the plant that need pure water and
- preheater module structures/chambers 8(1.1) supported by a burner, which may be additionally located in the furnace body depending on the capacity and the product to calcine the system.
4
PCT/TR2022/051243 2021-11-30 2022-11-04 Improvement in a vertical kiln Ceased WO2023101643A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US18/707,070 US20250003681A1 (en) 2021-11-30 2022-11-04 Improvement in a vertical kiln
EP22901952.6A EP4440733A4 (en) 2021-11-30 2022-11-04 IMPROVEMENT IN A VERTICAL OVEN
CA3236967A CA3236967A1 (en) 2021-11-30 2022-11-04 Improvement in a vertical kiln

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2021018846 2021-11-30
TR2021/018846 2021-11-30

Publications (1)

Publication Number Publication Date
WO2023101643A1 true WO2023101643A1 (en) 2023-06-08

Family

ID=86612905

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2022/051243 Ceased WO2023101643A1 (en) 2021-11-30 2022-11-04 Improvement in a vertical kiln

Country Status (3)

Country Link
US (1) US20250003681A1 (en)
CA (1) CA3236967A1 (en)
WO (1) WO2023101643A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012145802A2 (en) * 2011-04-27 2012-11-01 Calix Limited Reactor system and method for thermally activating minerals
CN208545315U (en) * 2018-07-16 2019-02-26 长沙中硅水泥技术开发有限公司 A system for co-processing of electrolytic aluminum waste in cement kilns and co-production of double-fast cement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012145802A2 (en) * 2011-04-27 2012-11-01 Calix Limited Reactor system and method for thermally activating minerals
CN208545315U (en) * 2018-07-16 2019-02-26 长沙中硅水泥技术开发有限公司 A system for co-processing of electrolytic aluminum waste in cement kilns and co-production of double-fast cement

Also Published As

Publication number Publication date
US20250003681A1 (en) 2025-01-02
CA3236967A1 (en) 2023-06-08

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