The document discusses waste heat boilers used in coke dry quenching (CDQ) systems. CDQ systems cool coke using inert gas, which is then sent to a waste heat boiler. The boiler captures heat from the gas to generate steam. The document provides details on CDQ waste heat boiler models from Zhengzhou Boiler including specifications, fuel types, and contact information. It notes that CDQ systems and waste heat boilers allow energy and environmental benefits through waste heat recycling.
Carbon rotary kiln waste heat boiler in chinajacker gu
The carbon series waste heat boiler is mainly applied in the industries which produce carbon products and other related enterprises.
Structure:
The whole structure adapts vertical inverted Ⅱ type, with a horizontal suspended super heater, convection tubes arranged in rows, the Serpentine tube economizer ,the water cooling system, etc.
It has the advantages of small size, low investment, novel structure and superior performance, etc.
Performance of the Boiler and To Improving the Boiler Efficiency Using Cfd Mo...IOSR Journals
The power sector is one of the sectors of the India's economy. The development of the country to a
large extent is dependent on the growth of this sector. Through the progress of the power sector during the past
four decades has been sustainable, the power industry has been unable to fulfill primary obligation of
production quality power supply in required quantity. We did our project in Stage- 4, Unit -7 of Dr. Narla Tata
Rao Thermal Power Station, Vijayawada and analyzed the performance of the boiler of the above-mentioned
unit of capacity 500MW. Our project was mainly concerned with the Boiler Operations & Maintenance
Department (O&M). Initially, we calculated the performance and efficiency of the boiler. The Computational
Fluid Dynamics (CFD) approach is utilised for the creation of a two-dimensional model of the economizer coil.
Using mild steel material in the economizer part it gives better performance compared with the carbon steel
material. The fluid flow temperature, pressure is increase and velocity is decrease field of fluid flow within an
economizer tube using the actual boundary conditions have been analyzed using CFD tool. So the boiler
performance will be increased. And the experimental setup is from Dr. NTTPS, Vijayawada having the unit no
IV of 500 MW energy generations.
Venkateshwara Power Projects Pvt Ltd (a part of Mahadik Group) is established
in 2019 to set up a greenfield distillery in Bedikhal in Chikodi Taluk in Belgaum
district of Karnataka. The project involves setting up of a 90 klpd molasses-based
distillery. The project cost is estimated at Rs. 1073.0 million. The main objective
of this plant is to produce Ethanol and generation of electricity.
Non recovery-heat recovery cokemaking - a review of recent developmentsJorge Madias
This paper is an update of a previous publication in Spanish [1]. One of the current trends in the production of
metallurgical coke is the comeback of non-recovery ovens. This is driven by less interest in byproducts, smaller investment per annual ton, better environmental performance. The development took place particularly in China, India, USA, Brazil, Australia and Colombia [2]. In the USA, one important factor promoting this technology was that EPA declared it as Maximum Achievable Current technology in 1990. This technology arises from the classic beehive ovens which supplied since the XVIII century the coke for the industrial revolution. Those ovens were manually operated, with small heat recovery, just for heating the oven. Now, non-recovery ovens are modern construction, with highly mechanized operation, and automated to a certain degree. Gases generated by the combustion of the volatile matter are sent through downcomers and further burnt to heat the oven bottom and sides; in many cases, mostly when the plant is built within or closed to a steelmaking facility, the hot gas is used for vapor generation and electric power production. Main differences between conventional and non-recovery/heat recovery processes are shown in figure 1. In conventional process, the coal charged receives the heat indirectly through the furnace walls, by combustion of external gas; inside the oven, positive pressure develops. Gas generated in the coking process is sent to the
by-products plant. In non-recovery ovens, coking proceeds from the top through direct heating by the partial
combustion of the volatile matter over the coal bed, and from the bottom by heat coming from full combustion of gases escaping from the oven. In these plants, the offgas is treated and sent to the stack, in many cases after recovering sensible heat to produce vapor and electric power. Installed capacity for these furnaces was esteemed in 2005 in 22 M metric tons per year, probably including
beehive ovens [2]. In table 1, some of the non-recovery coke plants currently operating are listed. Some plants
belong to companies with coal mining as its core business; others are independent coke producers, purchasing coal and selling coke; then there is some joint ventures between coke producers and steelmakers,
and finally, captive coke plants belonging to steel companies.
Carbon rotary kiln waste heat boiler in chinajacker gu
The carbon series waste heat boiler is mainly applied in the industries which produce carbon products and other related enterprises.
Structure:
The whole structure adapts vertical inverted Ⅱ type, with a horizontal suspended super heater, convection tubes arranged in rows, the Serpentine tube economizer ,the water cooling system, etc.
It has the advantages of small size, low investment, novel structure and superior performance, etc.
Performance of the Boiler and To Improving the Boiler Efficiency Using Cfd Mo...IOSR Journals
The power sector is one of the sectors of the India's economy. The development of the country to a
large extent is dependent on the growth of this sector. Through the progress of the power sector during the past
four decades has been sustainable, the power industry has been unable to fulfill primary obligation of
production quality power supply in required quantity. We did our project in Stage- 4, Unit -7 of Dr. Narla Tata
Rao Thermal Power Station, Vijayawada and analyzed the performance of the boiler of the above-mentioned
unit of capacity 500MW. Our project was mainly concerned with the Boiler Operations & Maintenance
Department (O&M). Initially, we calculated the performance and efficiency of the boiler. The Computational
Fluid Dynamics (CFD) approach is utilised for the creation of a two-dimensional model of the economizer coil.
Using mild steel material in the economizer part it gives better performance compared with the carbon steel
material. The fluid flow temperature, pressure is increase and velocity is decrease field of fluid flow within an
economizer tube using the actual boundary conditions have been analyzed using CFD tool. So the boiler
performance will be increased. And the experimental setup is from Dr. NTTPS, Vijayawada having the unit no
IV of 500 MW energy generations.
Venkateshwara Power Projects Pvt Ltd (a part of Mahadik Group) is established
in 2019 to set up a greenfield distillery in Bedikhal in Chikodi Taluk in Belgaum
district of Karnataka. The project involves setting up of a 90 klpd molasses-based
distillery. The project cost is estimated at Rs. 1073.0 million. The main objective
of this plant is to produce Ethanol and generation of electricity.
Non recovery-heat recovery cokemaking - a review of recent developmentsJorge Madias
This paper is an update of a previous publication in Spanish [1]. One of the current trends in the production of
metallurgical coke is the comeback of non-recovery ovens. This is driven by less interest in byproducts, smaller investment per annual ton, better environmental performance. The development took place particularly in China, India, USA, Brazil, Australia and Colombia [2]. In the USA, one important factor promoting this technology was that EPA declared it as Maximum Achievable Current technology in 1990. This technology arises from the classic beehive ovens which supplied since the XVIII century the coke for the industrial revolution. Those ovens were manually operated, with small heat recovery, just for heating the oven. Now, non-recovery ovens are modern construction, with highly mechanized operation, and automated to a certain degree. Gases generated by the combustion of the volatile matter are sent through downcomers and further burnt to heat the oven bottom and sides; in many cases, mostly when the plant is built within or closed to a steelmaking facility, the hot gas is used for vapor generation and electric power production. Main differences between conventional and non-recovery/heat recovery processes are shown in figure 1. In conventional process, the coal charged receives the heat indirectly through the furnace walls, by combustion of external gas; inside the oven, positive pressure develops. Gas generated in the coking process is sent to the
by-products plant. In non-recovery ovens, coking proceeds from the top through direct heating by the partial
combustion of the volatile matter over the coal bed, and from the bottom by heat coming from full combustion of gases escaping from the oven. In these plants, the offgas is treated and sent to the stack, in many cases after recovering sensible heat to produce vapor and electric power. Installed capacity for these furnaces was esteemed in 2005 in 22 M metric tons per year, probably including
beehive ovens [2]. In table 1, some of the non-recovery coke plants currently operating are listed. Some plants
belong to companies with coal mining as its core business; others are independent coke producers, purchasing coal and selling coke; then there is some joint ventures between coke producers and steelmakers,
and finally, captive coke plants belonging to steel companies.
Classification, Advantages and applications, Commercially viable
waste heat recovery devices, Saving potential.
Waste heat is heat, which is generated in a process by way of fuel combustion or chemical
reaction, and then “dumped” into the environment even though it could still be reused for some
useful and economic purpose. The essential quality of heat is not the amount but rather its
“value”. The strategy of how to recover this heat depends in part on the temperature of the waste
heat gases and the economics involved.
Indian experiences on Energye Efficiency in Steel Rolling Millseecfncci
Since the establishement of Bureau of Energy Efficiency in 2001 India has been implementing a lot of activities in energy-intensive sector. In Steel Rolling Mills with low-end and high-end technolgies considerable energy and cost sanvings can be achieved. The presentation was prepared in the Context of GIZ NEEP programm in Nepal in 2012.
A Brief Introduction to Industrial boiler. And details about Boiler of Monnet Power Company Ltd(2X525 MW) Thermal Power Plant. Details about parts of Boiler, Water & Steam path, Oil Circuit, flue Gas Circuit.
Incepted in 2007, Urja Thermal Solutions is a prominent company engaged in the Manufacturing, Exporting and supplying of Thermal Solutions. The company is working under the valuable assistance of its Owner, Mr. Swapnil Gautam. His successful contribution has helped the company grow in leaps and bounds. The company is located in Mumbai, Maharashtra.
GE / Texaco Gasifier Feed to a Lurgi Methanol Plant and its Effect on Methano...Gerard B. Hawkins
GE / Texaco Gasifier Feed to a Lurgi Methanol Plant and its Effect on Methanol Production
CONTENTS
0 Methanol Synthesis Introduction
1 Executive Summary
2 Design Basis
2.1.1 Train I Design Basis
2.1.2 Train II Design Basis
2.1.3 Train III Design Basis
2.2 Design Philosophy
2.2.1 Operability Review
2.3 Assumptions
2.4 Train IV Flowsheet
2.4.1 CO2 Removal
3 Discussion
3.1 Natural Gas Consumption Figures
3.1.1 Base Case
3.1.2 Case 1 – Coal Gasification in Service
3.1.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.2 Methanol Production Figures
3.2.1 Base Case
3.2.2 Case 1 – Coal Gasification in Service
3.2.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.3 85% Natural Gas Availability
3.4 100% Natural Gas Availability
3.5 CO2 Emissions
3.5.1 Base Case
3.5.2 Case 1 – Coal Gasification in Service
3.5.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.6 Specific Consumption Figures
3.6.1 Base Case
3.6.2 Case 1 – Coal Gasification and CO2 Import
3.6.3 Case 2 – Coal Gasification and No CO2 Import
3.7 Train IV Synthesis Gas Composition
4 Further Work
5 Conclusion
APPENDIX
Important Stream Data – Material Balance Stream Data
Texaco Gasifier with HP Steam Raising Boiler
CHARACTERISTICS OF COAL
Material Balance Considerations
Paul J. Boudreaux Consider a Mixed Analog/Digital/MEMsssusercf6d0e
Heat spreaders with high K values attached to the chip can help alleviate lateral DT problems. Placing the system or components into a forced isothermal environment also reduces DT, dT/dt and CTE related problems. Severing the thermomechanical heat path reduces or eliminates shock and vibration from entering the system while reducing weight.
Classification, Advantages and applications, Commercially viable
waste heat recovery devices, Saving potential.
Waste heat is heat, which is generated in a process by way of fuel combustion or chemical
reaction, and then “dumped” into the environment even though it could still be reused for some
useful and economic purpose. The essential quality of heat is not the amount but rather its
“value”. The strategy of how to recover this heat depends in part on the temperature of the waste
heat gases and the economics involved.
Indian experiences on Energye Efficiency in Steel Rolling Millseecfncci
Since the establishement of Bureau of Energy Efficiency in 2001 India has been implementing a lot of activities in energy-intensive sector. In Steel Rolling Mills with low-end and high-end technolgies considerable energy and cost sanvings can be achieved. The presentation was prepared in the Context of GIZ NEEP programm in Nepal in 2012.
A Brief Introduction to Industrial boiler. And details about Boiler of Monnet Power Company Ltd(2X525 MW) Thermal Power Plant. Details about parts of Boiler, Water & Steam path, Oil Circuit, flue Gas Circuit.
Incepted in 2007, Urja Thermal Solutions is a prominent company engaged in the Manufacturing, Exporting and supplying of Thermal Solutions. The company is working under the valuable assistance of its Owner, Mr. Swapnil Gautam. His successful contribution has helped the company grow in leaps and bounds. The company is located in Mumbai, Maharashtra.
GE / Texaco Gasifier Feed to a Lurgi Methanol Plant and its Effect on Methano...Gerard B. Hawkins
GE / Texaco Gasifier Feed to a Lurgi Methanol Plant and its Effect on Methanol Production
CONTENTS
0 Methanol Synthesis Introduction
1 Executive Summary
2 Design Basis
2.1.1 Train I Design Basis
2.1.2 Train II Design Basis
2.1.3 Train III Design Basis
2.2 Design Philosophy
2.2.1 Operability Review
2.3 Assumptions
2.4 Train IV Flowsheet
2.4.1 CO2 Removal
3 Discussion
3.1 Natural Gas Consumption Figures
3.1.1 Base Case
3.1.2 Case 1 – Coal Gasification in Service
3.1.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.2 Methanol Production Figures
3.2.1 Base Case
3.2.2 Case 1 – Coal Gasification in Service
3.2.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.3 85% Natural Gas Availability
3.4 100% Natural Gas Availability
3.5 CO2 Emissions
3.5.1 Base Case
3.5.2 Case 1 – Coal Gasification in Service
3.5.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.6 Specific Consumption Figures
3.6.1 Base Case
3.6.2 Case 1 – Coal Gasification and CO2 Import
3.6.3 Case 2 – Coal Gasification and No CO2 Import
3.7 Train IV Synthesis Gas Composition
4 Further Work
5 Conclusion
APPENDIX
Important Stream Data – Material Balance Stream Data
Texaco Gasifier with HP Steam Raising Boiler
CHARACTERISTICS OF COAL
Material Balance Considerations
Paul J. Boudreaux Consider a Mixed Analog/Digital/MEMsssusercf6d0e
Heat spreaders with high K values attached to the chip can help alleviate lateral DT problems. Placing the system or components into a forced isothermal environment also reduces DT, dT/dt and CTE related problems. Severing the thermomechanical heat path reduces or eliminates shock and vibration from entering the system while reducing weight.
Apart from TDMA, there are other iterative methods for solving the
system of equations which are faster. Unlike TDMA, which solves
the problem line by line, these iterative methods solves all
equations simultaneously. As a result these methods are faster than
TDMA. Some of the fast iterative methods are
1) SIP (strongly implicit procedure)
2) MSIP (modified SIP)
3) CG (Conjugate gradient method)
4) BiCGSTAB (bi-conjugate gradient stabilized method)
CG method is used for solving linear systems of equations which
have a symmetric coefficient matrix. All other methods mentioned
above are used for systems of equations involving non-symmetric
coefficient matrices.
must be set up at each nodal point.
We obtain a system of linear algebraic equations
Solve the system for values
Use any matrix solution method.
e.g. Tri-diagonal matrix algorithm (see textbook)
or: Gauss Seidel iteration method.
The convection of a scalar variable depends on the
magnitude and direction of the local velocity field.
How to find flow field?
Momentum equations can be derived from the Both sides of the equation contains temperatures at the new time step,
and a system of algebraic equations must be solved at each time level
is unconditionally stable for any Δt
is only first order accurate in time
small time steps are needed to ensure accuracy of results
The understanding of two-phase flow and heat transfer
with phase change in minichannels is needed for the design and
optimization of heat exchangers and other industrial
applications. In this study a three-dimensional numerical model
has been developed to predict filmwise condensation heat
transfer inside a rectangular minichannel. The Volume of Fluid
(VOF) method is used to track the vapor-liquid interface. The
modified High Resolution Interface Capture (HRIC) scheme is
employed to keep the interface sharp. The governing equations
and the VOF equation with relevant source terms for
condensation are solved. The surface tension is taken into
account in the modeling and it is evaluated by the Continuum
Surface Force (CSF) approach. The simulation is performed
using the CFD software package, ANSYS FLUENT, and an inhouse
developed code. This in-house code is specifically
developed to calculate the source terms associated with phase
change. These terms are deduced from Hertz-Knudsen equation
based on the kinetic gas theory. The numerical results are
validated with data obtained from the open literature. The
standard k-ω model is applied to model the turbulence through
both the liquid and vapor phase. The numerical results show
that surface tension plays an important role in the condensation
heat transfer process. Heat transfer enhancement is obtained
due to the presence of the corners. The surface tension pulls the
liquid towards the corners and reduces the average thermal
resistance in the cross section.
The role of boilers and heat recovery steam generators (HRSGs) in the industrial
economy has been profound. Boilers form the backbone of power plants,
cogeneration systems, and combined cycle plants. There are few process
plants, refineries, chemical plants, or electric utilities that do not have a steam
plant. Steam is the most convenient working fluid for industrial processing,
heating, chilling, and power generation applications. Fossil fuels will continue to
be the dominant energy providers for years to come.
This book is about steam generators, HRSGs, and related systems. There
are several excellent books on steam generation and boilers, and each has been
successful in emphasizing certain aspects of boilers and related topics such as
mechanical design details, metallurgy, corrosion, constructional aspects, maintenance,
or operational issues. This book is aimed at providing a different
perspective on steam generators and is biased toward thermal and process
design aspects of package boilers and HRSGs. (The terms ‘‘waste heat boiler’’
and ‘‘HRSG’’ are used in the same context.) My emphasis on thermal engineering
aspects of steam generators reinforced by hundreds of worked-out real-life
examples pertaining to boilers, HRSGs, and related systems will be of interest
to engineers involved in a broad field of steam generator–related activities such as
consulting, design, performance evaluation, and operation. During the last three decades I have had the opportunity to design hundreds
of package boilers and several hundred waste heat boilers that are in operation in
the U.S. and abroad. Based on my experience in reviewing numerous specifications
of boilers and HRSGs, I feel that consultants, plant engineers, contractors,
and decision makers involved in planning and developing steam plants often do
not appreciate some of the important and subtle aspects of design and performance
of steam generators.
Among the leading causes of discomfort in an air conditioned environment we can detected:
• too high air flow, generating drafts;
• uneven distribution of the incoming air volume;
• non homogeneous temperature distribution in the room.
To avoid these drawbacks, it is necessary to generate a proper diffusion of the air, which guarantees the right
temperature, relative humidity, speed and purity corresponding to the environmental comfort desired.
The Eurapo UCS cassette units are able to give a balanced response to all these needs: the outlet air is spread
like a classic four-way ceiling diffuser, with distribution from two to four orthogonal directions.
This system takes full advantage of the Coanda effect, greatly reducing the air flow direct to people, with
positive consequences for their comfort.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
1. Waste Heat Boiler
Waste Heat Boiler of CDQ
Details
Parameters
General description
Performance advantages
Catalogue
http://www.zgboilers.com/
Contact ways
Project References Main specification
Technical Parameter
2. 2 The quality is the test of the character . It is our mission to satisfy our customers.
Dry quenching is a kind of technology, which cools coke by inert gas and then transfers heated inert gas to boiler, finally sends
it into CDQ boiler for recycling use. The process is energy-saving and environment friendly.
GENERAL DESCRIPTION:
Performance advantages
Details
Waste Heat Boiler of CDQ
Project References
CDQ Waste heat boiler in china 35t Carbon Kiln Waste Heat Power Boiler Kazakhstan float glass waste heat boiler in china
Website: http://www.zgboilers.com/
Waste Heat Boiler of CDQ
Industrial waste boiler makes worse slag of pure burning straw after
making ethanol as fuel without the need of coal to recycle the waste
to provide power. The ashes left can be used as agricultural fertilizer.
3. Model Capacity(t/h)
Pressure(MP
a)
Steam
Temperature(
℃)
feed water
Temperature(
℃)
Fuel Factory mode
ZG-
30/3.82/330-T
30 3.82 330 105 Straw field assembly
ZG-45/3.82-T 45 3.82 450 105 Rice hulls field assembly
ZG-
45/4.1/350-T
45 4.1 350 105 Palm shell field assembly
ZG-75/3.82-T 75 3.82 450 150 Peanut shell field assembly
ZG-75/5.29-T 75 5.29 485 150
and other
biomass
field assembly
3 The quality is the test of the character . It is our mission to satisfy our customers.
Parameters
Website: http://www.zgboilers.com/
4. Cantact us
http://www.zgboilers.com/
Factory Address:
ZHENGZHOU BOILER(GROUP) CO.,LTD
NO.88 Science Road,High and New Technology Development District,
Zhengzhou,China
4 The quality is the test of the character . It is our mission to satisfy our customers.
Sales Tel: 0086-371-86062323
Fax: 0086-371-86062323
FAX
Website: http://www.zgindustrialboiler.com/
Skype: zgboiler
E-mail: zg@zgvessel.com