Prime Tech Industrial Double Chamber Lime Kiln, Cocurrent Flow Kiln

• After-sales Service: One Year Guarantee
• Warranty: One Year Guarantee
• Customized: Customized
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: Lime Kiln, Double Chamber Kiln
• Condition: New
• Power Source: Gas,Coal
• Automatic Grade: Automatic
• Type: Lime Production
• Certification: ISO, CE
• Raw/Over-Burning Rate: No More Than 5%
• Type of Lime: Special Type
• Unit Consumption of Lime: 840 ~ 900kal/Kg
• Activity Degree: 360~420ml
• Transport Package: Steel Structure, Wooden Case
• Specification: Customized
• Trademark: PRIME
• Origin: China
• HS Code: 8417804000
• Production Capacity: 20 Sets/Year
• Package Size: 3000.00cm * 1000.00cm * 500.00cm
• Package Gross Weight: 1300000.000kg

Product Description

Product Description

 

Overview
1. Project Outline

1.1 Basic Conditions
1.2.1 Geological & meteorological conditions, and power supply mode

Description	UOM	Parameters
Altitude above MSL	Meter	498
Ambient temperature	^0C	43 (max), 16(min)
Relative humidity	%	20 - 45
Mean wind speed	km/hr	60
Seismic zone		II, least to moderate
HT AC power supply		11 kV and 3.3 kV.
LT AC power supply		415 V, 3 phase 50 Hz.
AC controlling & signaling voltage		100 Volts
Control voltages		110 VAC & 24V DC
Type of safety		IP 65

1.2.2 Specifications of raw materials(size and chemical composition)
 

Chemical composition	Bagalkote	Rajasthan	Malaysia	Dubai
CaO	48 % min	52 % min	53 % min	53 % min
SiO2	2.5 % max	1 % max	0.5 % max	0.5 % max
MgO	5 % max	1 % max	1 % max	1 %  max
R2O3(Al2O3+ Fe2O3)	2 % max	1 % max	0.5 % max	0.5 % max

Size of lime stone: within 30 to 60mm, O/S (overlarge size) and U/S (ultra small size) are no more than 10%.
Volume density: 1.6 to 1.8
Humidity: 2.00% max.
1.2.3 Fuel
Dual Fuel: Pulverized Coal and BF Gas (730 KCal/NM³)
1) Pulverized Coal Properties

•  Coal fineness: - 0.075 mm ≥80 %.
•  Pulverized coal moisture content: < 1%.
• Ash Content:  ≤ 14%.
• GCV:   ≥ 7000 KCal / Kg  
•  VM:          ≤ 22%.
•  Sulphur:   ≤ 0.65

1.2.4  Finish product specification:
CaO: -  90 to 92 %
SiO₂:- 1.00% max 
MgO: - 1.5 % max.
Fe₂O₃ + Al₂O₃:- 1.00% max
LOI:- 3 % max
Reactivity: - 400 ml min of 4N HCl.
Size:-10 mm ~30 mm for EOF (140T/D) & 10mm- 50mm for LRF (25T/D) 
Packing: - 1 Ton. HDPE Jumbo bag facilities.

1.3 Production Capacity and Products Performance
1.3.1 Production capacity
Type of lime kiln: parallel flow regenerative annular double hearth lime kiln
Q'TY of lime kiln: 1 set
Daily capacity: 300T/D
Working days in one year: 340 days
Annual capacity: 100,000 tons
1.3.2 Product performance of lime stone
Activity:  ≥ 360 ml (4N.HCL), max. 420 ml
Raw burning rate: ≤5%
Content of CaO: ≥ 90 %

1.4 Main Job Content of the Project

1) storage, screening and transportation of raw material
2) Hopper and charging hoist system
3) lime kiln proper
4) lime transportation, screening and storage system
5) air blower room and air transportation system
6) gas pressurizing system
7) pulverized coal injection system
8) dust collection system for flue gas of lime kiln
9) transportation, screening and dust collection system for lime stone and quicklime,
10) hydraulic station and piping

2 Technical proposal
2.1 Foundation of Proposal Development
1) to produce active lime with BFG or pulverized coal
2) calorific value of BFG: ≥730×4.18KJ/Nm³(low)
:Q≥730×4.18KJ/Nm³
3) calorific value of pulverized coal: ≥7000×4.18KJ/kg (low)
:Q≥7000×4.18KJ/kg
4) capacity: 300t/d
2.2 Design Content
2.2.1 Guidelines for process design
This design focuses on reliable technology, advanced process and compact design of the workshop, to be economical, environmentally friendly, safe, energy saving and highly efficient project.
2.2.2 Scope of design
The scope of design includes the whole set of process technology and equipment from receiving lime stone raw materials which meet the requirement of the process to producing qualified lime products for metallurgy. Namely, they are lifting transportation equipment for all lines, process mechanical equipment, process thermal equipment, hydraulic control equipment, electrical control equipment, computer control equipment, etc.
The starting point of design is the lime stone receiving hoppers and the terminal is the storage bins for active lime.

2.2.3 Scope of engineering
The scope and content of engineering are lime stone charging system (raw material yard not included), parallel flow regenerative annular double hearth vertical kiln, hydraulic station, air blower room, gas pressurizing station, main control room, finished products warehouse, dust collection from flue gas, dust transfer and transportation system, etc.
2.2.4 Scale of construction
A new 300T/D annular double hearth vertical kiln for active lime is to be built. It will meet the requirements of capacity, quality, continuity of following production, economy, and fluency of material transportation.
2.2.5 Product quality and heat consumption index
2.2.5.1 Product quality
 Activity: ≥360ml  (4NHCl)
Content of CaO: ≥90 %
2.2.5.2 Heat consumption index
Heat consumption 1 ≤ 1050×4.18KJ/kg lime (calorific value of BFG ≥ 730×4.18KJ/Nm³)
Heat consumption 2 ≤ 950×4.18KJ/kg lime (calorific value of pulverized coal ≥ 7000×4.18KJ/Nm³)
2.2.6 External conditions for the project
2.2.6.1 Raw material
The raw material is the purchased qualified lime stones. If they are landed during transportation and storage, they should be put on concrete lands and should not contact the earth. They should not mix with other minerals during transportation to avoid impurities entering the lime stones.
--particle size of raw material
The particle size of raw material within 30 to 60mm is qualified. These materials should be screened or washed to remove impurities. The proportion of particle size is in a matter of linear distribution. Particle size smaller than 30mm (the minimum no smaller than 20 mm) and larger than 60mm (the max. no larger than 70mm) occupies less than 10% of the total, not including impure stones and earth.
Considering the quality requirement from the client, we thought materials from the following three can be selected as qualified materials.


Table 3-1 List of Physicochemical Index of Lime Stone

Chemical composition	Rajasthan	Malaysia	Dubai
CaO	52 % min	53 % min	53 % min
SiO2	1 % max	0.5 % max	0.5 % max
MgO	1 % max	1 %   max	1 %  max
R2O3(Al2O3+ Fe2O3)	1 % max	0.5 % max	0.5 % max

MgO	1 % max	1 %   max	1 %  max
R2O3(Al2O3+ Fe2O3)	1 % max	0.5 % max	0.5 % max

2.3.6.2 Fuel

BFG
1) calorific value: BFG ≥730kcal/Nm³

2) water contained: saturated vapor

3) dust content <10mg/Nm³

4) inlet pressure of pressurizing machine: 6 to 8 KPa (stable)

5) inlet temperature of pressurizing machine: ambient temperature

6) BFG flow rate at inlet: 20700 Nm³/h(with 15% surplus)

Pulverized Coal
Pulverized Coal Properties

•  Coal fineness 0.075 mm ≥80 %
•  Pulverized coal moisture content: < 1%.
• Ash Content:  ≤ 14%.
• GCV:   ≥ 7000 KCal / Kg  
•  VM:          ≤ 22%.
•  Sulphur:   ≤ 0.65

2.3.6.3 power supply
To ensure the production of active lime, there should be two lines of power supply.
Voltage: 415V/110V, fluctuation: ±10%
Frequency: 50 Hz, fluctuation: ±1Hz
Installed capacity: 2000 KW
2.3.6.4 water supply
The water for the production is to cool equipment and the pressure is within 0.3 to 0.4Mpa.
PH of water: 7~9
Max. temp. of supplied water in summer: ≯30ºC
Temp. at outlet: <50ºC
suspended matter: <15mg/L
Total hardness: <150ppm
Supplement quantity (lucid circulating): <10t/h
2.3.6.5 compressed air (N₂)
a,N₂
used for purging BFG pipelines
pressure: 0.2MPa
purity: 99.9%
max. time period: 200m³/time
purging time: 15~30 minutes/time
b,reverse blowing bag for dust collection
consumption amount: about 6 m³/min
working pressure: 0.5MPa~0.7MPa
c,compressed air (exchanged with N₂)
--compressed air (or N₂)for instrumentation
To control instrumentation actuating mechanism, the compressed air is cleaned after oil and water are removed and being dried. If N₂ source is available, try to use N₂ as far as possible.
consumption amount: 2 m³/min
working pressure: 0.4MPa~0.6MPa
purifying requirement: <15mg/m³
oil content: <15ppm
dew point: <-15ºC
Safety stock: in case of emergency, it should reserve 2m³ lasting for 3 seconds to be used for turning down BFG rapid cut-off valve.

2.4 Main Content of the Project

1. screening and transportation of raw material
2. Hopper and charging hoist system
3. lime kiln proper

4) air blower room and air transportation system
5) BFG pressurizing machine room and transportation system
6) storage, transportation and injection system of pulverized coal,,
7) dust collection system for flue gas of lime kiln
8) control and operating rooms for lime kiln,
9) LT power distribution system
10) hydraulic station and piping system
11) transportation, screening and dust collection system for lime stone and quicklime,
12) 5 Nos. of lime products (3 for block ash products, 1 for scrape and 1 for powder ash )


2.5 Main Index of Lime Kiln
1) production capacity of lime: 300T/D, 100,000T/A

2) consumption of lime stones: 540T/D, 183,600T/A

3) fuel consumption: BFG 18000 Nm³/h(Q_low=730KCal/Nm³)       Pulverized coal 1696 kg/h(Q_low=7000KCal/kg)

4) water consumption for production: about 10t/h (lucid circulation water)

5) compressed air (N₂): 6m³/min

6) area covered and construction area:
The area covered by the lime kiln proper is 10.3×13.6m², BFG pressurizing machine room is 10×18m², dust collector of flue gas₂ and the transportation system 8.5×6m².

3 Process and Equipments
3.1 Brief Introduction
A new 300T/D annular lime kiln will be built and the performance and index of final products lime are shown in list 3-1. (Note: activity index in the flowing list requires the CaO content in lime stone should be large than 52%, for lime stone with better quality, the requirement will be high.)
List 3-1

Item Index	activity	CaO%	SiO2%	MgO%	Fe2O3 + Al2O3%	LOI,%	Particular size(mm)
data	≥360ml(4N.HCL),with the improved quality, the max> will be 420ml	90-92	≤1	≤1.5	≤1	≤3	0~50

3.2 Material Balance Sheet
To fulfill the goal of 300 tons per day of finished product lime, the capacity and consumption amounts of lime and lime stone are shown in list 3-2. (Note: the calorific value of BFG is 730 Kcal/Nm³, the calorific value of pulverized coal is 7000Kcal/kg.)

List3-2 Material Balance Sheet

No.	Item	Equipment operating system	Q'TY of material(t)
			year	day	shift	hour
1	Lime discharged	340/3/8	102000	300	100	12.5
2	Lime created	340/3/8	104040	306	102	12.8
3	Lime stone charged	340/3/8	183600	540	180	22.5
4	Lime stone in stock before charging	340/3/8	187170	550	183	23
5	Consumption of BFG, Nm^3	340/3/8	142560000	432000	144000	18000
6	Consumption of pulverized coal, t	340/3/8	13432.320	40.704	13.568	1.696

Note:
1. The consumption of BFG per day and shift are the average one for the reversing time is ignored.
2. The quantity of lime stone is for the qualified one, scrapes are not considered.
3. The LOI of lime stone is based on 43.5%
4. The transportation loss of lime stone during transportation is based on 1%.
5. Ash loss of lime calcinations is based on 2%.

3.3  Brief Introduction of Process Flowchart
3.3.1 raw material
The daily capacity of lime is 300 tons and raw material lime stones needed is about 540tons. To reduce initial cost, the raw material yard of this project is original stone yard. The raw materials are placed into the storage hopper by forklift truck, and then transferred to raw material screening by conveyor belt according to quantity required. The waste material after being screened will be transferred to pointed locations by conveyor belt. The qualified material on the screening unit is transferred to charging hopper by conveyor belt and delivered weighing hopper by vibration feeder beneath. Material weighed will be  unloaded onto charging trolley by sliding groove. The charging trolley is ready, when receiving signal from PLC, it will begin to charge material.
3.3.2 process flowchart of hearth charging and discharging,
3.3.2.1 charging
The charging process is that the lime stone in the material warehouse on the top of the kiln is delivered into the top of the two kiln hearths by sliding groove. The sequential charging is realized by opening and closing the gates on the sliding grooves in turn. The volume of charging hopper is 6m³. Since the two kiln hearths are periodically charged, all the equipments mentioned above are working in an interrupted way.
3.3.2.2 discharging
The finished limes after being calcined and cooled in the kiln hearth will enter the storage bin at the bottom of the kiln and are ready to be discharged through 6 discharging platforms and 2 unloading valves.
The finished limes in the storage bin on the kiln bottom are delivered to the vibration screening unit to be classified through vibration feeder on kiln bottom, belt machine, three-way distributor and bucket lifting machine. After being screened, the block ash is delivered to product storage bin. All the vibration equipments are sealed to prevent dust from flying.
In the discharging system, the average flow rate is 12.5t/h. All the equipments shall boast suitable surplus enough for production capability.
Dust collection equipments are installed in each transferring points.
3.3.2.3 products storage bin
The lime storage system is initially considered to be made up with 5 product storage bins, 3 for stock ash, 1 for powder ash and the other one is for scrape material. The volume of product storage bin is for 1 to 2 days' capacity.
Continuous location detecting and dust collection facilities are installed in each storage bin.
The stock ash and powder ash in each bin are loaded onto vehicles to be transported through discharging valves under the bins and unloading equipments of dust collection system.
All the equipments in this system are all controlled on site.
3.3.3 Main process equipments
Main equipments in this process system include preparing storage bins, transition storage bins, measuring hopper, belt transporting facilities, drawer lifting machines, screening units, hoisting machines, trolleys, charging and discharging valves, etc. Among these, the unloading gate of the measuring hoppers and charging and discharging valves are all driven by a hydraulic system, others are by electrical.
3.3.3.1 charging hoisting machine
The charging hoisting machine is pre-installed on the assemble platform, including:

• 1 upper position reducer and 1 lower position reducing limit switch
• 1 anti-loose rope equipment
• 2 terminal upper position and lower position power limit switches
3.3.3.2 charging hopper
• Capacity: 5 tons
• Volume: 6m³
 

 

 

 

Company Profile

 

Company Profile
Vision
With decades of rapid development and accumulation, China has been perfect and mature on technology and management in various industrial areas, shaping a complete processing manufacturing industry with competitive price, well known for its excellent skill, high efficiency and hardworking team with qualification for personnel dispatching.
At the time of economic globalization, it is our consistent target and objective to integrate and export all kinds of technology, management mode, engineering project and manpower as per the actual requirement of our client With our own abundant technical strength, superior integration capability of technology and resources, well experienced of project implementation and management as basis and platform;
Let China go out to the world, and make the world know of China;

Professional
Professional technical and management team with abundant experience in the implementation of domestic and international projects;
Responsive
Responsively and meticulously, translating your needs into complete solutions;
Integration
Integrating various technologies and resources in China and fulfilling complementary advantages, by relying on professional teams;
Motivation
Motivated to provide the optimal solution and quality products;
Exceptional
Exceptional, delivery and,implementation of projects to meet, your expectations;

Our Team
Professional technical team
Prime is staffed with professional import & export team skilled with the practice of import and export business, including sea freight packing, logistics organization, L/C review, cargo booking, and customs clearance, L/C negotiation, double authentication of shipment documents, etc.
All above personnel are well experienced in the execution of projects in Southeast Asia and Middle East. 

Complete procurement mechanism
Our professional team of procurement offers strict management of supplier 's qualification inspection and selection, complete system of supplier listing, rating and elimination, to ensure the supplier is qualified and capable of implementing the project and supplied with product of high quality, and maintain a healthy and good condition of credibility, contract settlement and capital flow management.

Quality management system
Our complete quality management system , the process control covering from Scheme formulation , engineering technology, detailed design, to processing and manufacturing of equipment and material , ex-factory test and site erection and commissioning till it put into production, which through multi-level inspection, tour inspection, supervision and node control can ensure quality of the final product.

Well experienced
Executive team is abundant in experience of overseas project implementation with similar project working experiences, esp. experience in Southeast Asia, Middle East projects;

 

ISO System Certification

 

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