Coal Fired Boiler | Best Fuel-Efficient Boiler Manufacturers

  • 40 years experience
  • Directly coal fired boiler manufacturers
  • All kinds of fuels support
  • Certificate of CE, A-Class, Or ASME


coal boiler

High Quality & Good Price Coal Fired Boiler

Coal Boiler, Coal Fired Steam Boiler China Manufacturer
Normally the szl coal fired boiler design is assembly type. As a lot customer want to make the installation more easy, Yongxing will build furnace well for you in workshop.
Coal Fired Steam Boiler China Manufacturer
Yongxing 20tph is a big capacity coal fired steam boiler for sale. We could send you coal fired boiler diagram and boiler house drawing. Help you to design the best boiler system.
DZL8-1.25-1.6-AII/T 82% coal boiler efficiency
We will adopt steam economizer and air preheater for the coal fired boiler working. So our coal fired boiler efficiency is easily to get 82% or more.
DZL8-1.25-1.6-AII/T 82% coal fired boiler efficiency
Yongxing coal fired boiler uses a flake chain grate to help you mechanize feeding. In addition, our boiler feed uniform, stable combustion, and easy control.
Coal Fired Steam Boiler China
We use two wing type coal fired boiler furnace. This will make the fire into upside down α . The furnace is support any shape coal or biomass that Length≤2M.
Coal Fired Steam Boiler China
Yongxing manual feeding coal boiler doesn’t need uniform feeding. You no need to crush the coal or wood, any size is ok to filled into the furnace for combustion directly.

Our Coal Fired Steam Boiler Certifications

  • Certificate
  • Biomass Steam Boiler Certificate 3
  • Biomass Steam Boiler Certificate 2
  • Biomass Steam Boiler Certificate 4

Yongxing Coal Fired Steam Boiler Quality Control

Yongxing boiler group‘s main product is a coal fired boiler. We are one of the leading 4A class coal fired steam boiler manufacturers in China. We would be your first choice because of our competitive prices and high quality.
Coal-fired boilers are thermal devices that convert coal into heat energy by burning coal. The boilers are one of the most common devices used to convert coal to heat.
In comparison to a heating system for your factory, an industrial coal furnace differs from a boiler for your indoors.
1. There is a difference in body shape.
A domestic coal fired back boiler is small, with a height of less than 1 meter. Almost all the feed fill manual, and the grate fixes on below. It is possible to adjust the opening of a movable furnace door to fit the size of the fire.
The movable furnace door allows you to adjust the size of the burning fire.
2. Bottom grate of coal fired furnace varies. Most coal power plant boilers use chain grates. Coal-burning furnaces with refractory cement and masonry arches derived from coal.
This is so that coal ignites and burns more completely.
3. Coal firing power plant combustion is different. Yongxing has a lot of high temperatures and high evaporation capacities coal boilers. The combustion is more efficient and coherent, so they are more suitable for power plants.  
Yongxing could supply you with a lot of different models of coal-burning furnaces. Such as
  • DZL/DZH/LHG coal steam boiler
We offer you a choice of 2 tons DZL coal fired boiler, 4 tons coal-fired steam boiler, or 6~50 tons DZL/SZL coal fired steam boiler.
In the industrial field, Yongxing coal fired steam boilers are more used. DZL quick-loading coal boilers come with a single drum and long pipes.
We install steam economizers in coal boilers’ rear ends to maximize their efficiency. Yongxing coal burning boiler side equipped with the forced draft fan – FD FAN.
It provides enough air volume to ensure that your boiler can achieve the best combustion.
Our boiler design also includes slag removal to help you remove slag.
You could customize any part. Please send inquiries for any of them right now! Kindly read more in the bottom FAQ.


Coal Fired Steam Boiler China Manufacturer
coal fired boiler for sale
Coal Fired Steam Boiler China Manufacturer
Welcome To Visit Our Factory And Check Coal Fired Boiler
  • You are welcome to visit Yongxing at any time.
  • We will drive you from Zhengzhou airport to Yongxing, which is close to it.
  • Your journey to Coal Boiler will be accompanied by us.
  • If nearby Coal Boilers are running, we could take you there.


Yongxing Industrial Coal Boiler Quality Control

Boiler Drum & Tube Plate
Yongxing steam boiler Boiler drum, front plate, back plate all use Q245R  GB713-2008, spiral tube and downpipes all use 20g, GB3087-2008. Please check the SZL double drum coal fired boiler on production above.
Membrane Wall

We will use a membrane wall for your coal fired boiler. It can be highly improved your coal fired boiler efficiency. Yongxing is aiming to be the best coal fired steam boiler in China.



Coal Fired Boiler Tube Ends Welding

Your coal fired boiler will be welded smoothly and leak-free.

Double hydraulic test

Our next step will be to perform a hydraulic test, then we will hand weld the membrane wall after the inner coal fired boiler furnace has been welded.

Yongxing then conducts a hydraulic test for the second time. These factors will guarantee that we become your best coal fired boiler manufacturer.

Make all the welding 100% NDT test is our daily work




A Comprehensive Expert FAQ Guide

Are you searching for an affordable industrial Coal Boiler?  With over four decades in the coal fired boiler manufacturing industry, our products are guaranteed to meet all your needs. Here are a few frequently asked questions that will guide you in your search for the most appropriate boiler;

What Is A Coal Fired Boiler?

Coal boilers are devices that generate steam or hot water by heat exchange between water and the thermal energy released from coal combustion. The boiler is mainly composed of two parts: the “pot” and the “furnace.”

The “pot” refers to a sealed pressure vessel filled with water, which has convection tube bundles connected to the boiler drum to enhance heat transfer capability. Its function is to directly absorb the heat released by the coal and transfer it to the water.

Boiler drums come in various types, such as vertical, horizontal, single-drum, and double-drum designs.

The “furnace” consists of components such as a chain grate and flue gas tube bundles. It ensures the complete combustion of coal, allowing the heat released from the fuel to fully exchange with the water inside the boiler drum. Coal ash and flue gases are expelled from the furnace body through the chain grate and chimney.

By assembling the above two parts, different types of coal-fired boilers are formed.

Since the boiler drum operates as a closed pressure vessel (whether it’s for hot water or steam boilers) under high temperature and pressure, there is an inherent risk. Improper operation, outdated equipment, and various other factors can lead to serious accidents, causing factory shutdowns or affecting heating supplies for residences. Significant accidents can also result in substantial property damage and personal injury. Ensuring the safe operation of the boiler can only be achieved by strictly following standards and regulations in all aspects of boiler manufacturing, rational design, meticulous construction, and proper operation and maintenance management.

How Does Your Coal Fired Boiler Work?

A utility coal burning boiler produces thermal energy by igniting coal. Yongxing boiler works by burning coal in your chain grate stoker, thus heating the whole unit. The water in the boiler will become hot and generate steam which offers heat energy.

Our image below illustrates how our coal fired boiler works.

Coal boiler system

Yongxing coal stoker boiler is pre-set to run on all bituminous coal or anthracite with a heat value ranging from 4500-6000 kcal per kilogram.

Even you have a very low calorific value of coal and would like a boiler that can run on it. Because we can build a big volume boiler furnace, a long grate stoker, and a secondary fan to support the combustion, you don’t have to worry.

We will assemble a full set of control monitoring instruments for you. The coal fired boiler working is safe and reliable.

A coal fired steam boiler produces loads of ash during the process of combustion. You have to remove ash at the bottom of the boiler constantly to keep your boiler in good condition. It has a wide array of operational functions used in Numerous businesses.

Ash Conveyor
Ash conveyor                                                                       Dust collector

What is Your Coal Fired Boiler Design?

Our coal fired boiler has adopted a fully modern and advanced, safe design. Following are some of the boiler design parts.

  1. Yongxing adopts the new type of finned threaded smoke pipes, which increases the heating speed by 1/3 compared with the water tube boiler.
    These finned tubes will reduce your coal-fired steam boiler’s heat loss. Your coal fired boiler’s efficiency will be much higher than similar products.
    fire tubes
  2. Our boiler enhances combustion technology. It will come with a very large furnace design. It will come with a very large furnace design. We ensure that your coal steam boiler emission is in the lowest concentration. Our combustion chamber is larger.
  3. On both side headers, vertical longitudinal pipes connect to the upper boiler drums. It has good flexibility, eliminating the bulge defects of your coal plant boiler.  

    pipes welding to drums
    All pipes welded to drums
  4. It often has a very compact body. With the same boiler capacity, you can save 30% of the boiler room area.
  5. Our automatic coal boiler covers an extensive load change range. It is ok to supply you with 0-110% load, easy to adjust in your operation.
  6. The coal boiler design is assembly-type. It incorporates a steam economizer and air preheater to cut energy loss. This means it will consume less coal compared to other boilers of the same type.
Steam boiler with economizer
Boiler With Economizer

Your business success is subject to the effective reduction of operational costs. Our coal steam boilers will cut your business’ expenses by reducing coal consumption.

Moreover, Yongxing’s design makes your installation process a lot simpler compared to conventional boilers. Moreover, it assures coal fired steam boilers’ compact structure, reliable operation, and most durability quality.

In recent years, the world has seen consumers push for reducing air pollution. The coal boiler design responds to this pressure by meeting all environmental protection policies.

Why is this important for your business?

Globally, consumers are becoming aware of the importance of clean energy emissions.
Consumers are more likely to trust and interact with environmentally conscious businesses.

Your business will benefit long-term from a friendly coal fired steam boiler design.

Do You Also Have Coal Fired Steam Boiler?  

Yes, coal fired steam boiler is the main part of coal fired boilers. it is a modernized industrial appliance that produces steam, generating heat energy. It normally means a coal fired water tube boiler. If you run a hospitality business, you need heat energy for everyday heating.

It uses a cutting-edge furnace design that increases fuel combustion. It can achieve a thermal efficiency rate of 83%, which is way above current industry standards. Through the heating chamber, smoke is released into the air.

Flake long bar boiler fixed grate manual feeding customized door 2T 4T 6T
DZH coal steam boiler furnace

How To Calculate Coal fired Boiler Efficiency?

The basic formula to calculate coal fired steam efficiency is η= (Energy output)/ (Energy input) X 100.

Essentially, you have to divide the overall energy output of your boiler by the aggregated energy input given to it.

This 3-D image below shows all the sub-systems of your Coal fired boiler that collectively contribute to your boiler’s overall efficiency.


Coal fired steam boiler efficiency is a collective efficiency outcome of all constituents that make up the boiler. It has several sections. If any unit fails to work at an optimum level, it will have a negative impact on the boiler’s overall efficiency.

Can You Supply The Coal Fired Boiler Specification?

Yes, we supply the coal fired boiler specification for the three types of coal fired steam boilers, namely;

The specification of each coal boiler includes a complete product introduction, performance features, a system diagram, and specific technical parameters. Its specification is important because it helps you pick out a boiler that suits your particular needs.

Do You Have A Coal fired Boiler Operational Manual?

Yes, we have a comprehensive coal fired boiler operational manual for each type of boiler. There are several types of coal fired steam boilers, including DZH, SZL, and DZL boilers, among others. Each of them comes with an operational manual that offers detailed, precise boiler operating guidelines

Each boiler has a specific coal fired boiler operational manual because the modes of operation tend to vary from one boiler to another. What does your boiler’s operating manual entail?

The manual contains everything you need to know concerning your boiler, starting from setting it up and its control settings. It also provides broad periodic maintenance guidelines to ensure that your boiler is in good condition.

Do You Supply Coal Fired Boiler Chain Grate Boiler?

Yes, we supply a top-of-the-line coal fired chain grate boiler whose design is tailor-made to suit your specific needs. Our boiler adopts high-performance thermal energy transfer mechanisms. Essentially, its thermal efficiency rate meets all professional standards.

Yongxing’s chain grate coal fired steam boiler designs team was keen to incorporate several energy-saving tools and guarantee the optimum stability of coal combustion.

The main advantage of the boiler chain grate stoker is its impeccable safety standards. Before the boiler is cleared for supply, it is put through several quality control measures. The most notable quality measures include strength calculation, hydraulic tests and, a non-destructive test.

Here, coal fired chain grate boiler comes with an excellent structure and unmatched insulation standards that effectively reduce energy losses.

What Coal Fired Boiler Types Do You Have?

There are three coal fired boiler types that you can choose from, namely;

Yongxing’s coal based boiler meets all professional industry standards and is guaranteed to serve all your needs optimally. The Coal fired boiler comes in different designs and sizes to suit specific purposes.

For instance, if you run a small business, you can settle for the small coal fired boiler. The large commercial/vertical Coal-fired Steam boiler is ideal for large complex business operations which require energy constantly.

As the name suggests, the coal fired hot water boiler heats water for various uses. This type of coal boiler has several applications, including central heating, greenhouse, buildings, and factory processing. You also have to note that its energy efficiency rates and durability are unmatched.

The boiler has a horizontal structure and is ideal for large commercial applications. What advantages do you get when you choose this type of coal boiler? It has an incredibly minimal working pressure. Plus, it is known for its top-of-the-line safety features and durability. In comparison to other coal fired steam boiler types, it has high durablility.

Can I Have Your Coal Fired Boiler Diagram?

Yes, we can send you a coal fired boiler diagram. All you need to do is place a request on our website at Our diligent customer support staff will establish communications with you to ascertain your specific needs. The diagram plays a critical role in designing the best boiler system for you.

coal burning boiler system

Boiler 3D diagram

Business premises tend to vary in size. Are you concerned that your boiler may not fit into the available space? You don’t have to worry about that at all. We can formulate and supply different scaled coal fired boiler diagrams that will help you choose one that can fit into your space.

Do You Have A Bag Filter Coal Fired Boiler?

Yes, we have a Bag Filter for coal fired boiler. This Bag Filter effectively prevents dust particle movements and lessens air pollution. A Bag Filter is a long cylindrical woven or felted fabric that acts as a filter apparatus. There are several advantages that you will get from using the bag filter.

Positioned downstream of your coal boiler, the bag filter, also known as baghouse, separates ash from flue gas. It has a higher dust removal efficiency rate compared to other kits that perform the same function.

It is also important to note that the bag filter effectively regulates both whole and fine particulate matter. The image below is a simplified schematic illustration of a bag filter.

How Are Your Coal fired Boiler Emissions?

The coal fired boiler emissions factor ranges from 30mg/Nm3 to 300mg/Nm3. This emissions rate falls within the boundaries of the industry’s recommended standards.

Atmospheric emissions from coal boiler furnace can pose several serious adverse effects to human health and the environment. The legislation was put in place to ensure that such emissions are controlled to minimize environmental damage and human health risks.

Our coal fired boiler emission rates are excellent as far as industry standards and governmental regulations are concerned. You can minimize your boiler emissions by using quality anthracite coal and regular maintenance on your coal boiler.

Your coal fired chain grate boiler comes with a comprehensive user manual that guides you on ideal operation and avoidance of unnecessary emissions.

What Is The Difference Between Coal fired boiler VS. Oil Fired Boiler?

The difference between a coal fired boiler versus an Oil-fired boiler is pretty straightforward.  A coal boiler with hopper uses coal, whereas an oil-fired boiler uses oil. Coal is ignited to generate thermal energy. It would be best to use a specific type of Coal known as anthracite coal.

In an Oil fired boiler, you have to use light oil, diesel, gasoline, heavy oil, or waste oil. Plus, Oil fired boilers are more costly to operate and maintain than coal fired boilers because Coal is cheaper than oil.

You also have to note that coal fired stoker boilers are more environmentally friendly than oil fired boilers. it has better harmful emissions control devices than Oil fired boilers.

How To Choose A Coal Fired Boiler In China

Coal fired boilers for sale are less costly compared to natural gas boilers. Consequently, they have established dominance in China’s industrial boiler market. As a potential buyer, there are several kinds that you can choose from.

However, considering there are several manufacturers, you need to be very keen when choosing a coal boiler in China. If you select a coal fired steam boiler haphazardly, you might end up with a boiler that does not serve you optimally. How exactly do you choose it?

The first thing you need to do is consider the quality of the boiler over its price. Here are some features that you need to watch out for when choosing one;

  • The boiler should be able to supply the maximum quantity of steam with minimal fuel consumption
  • Coal Boiler should be cheap to install and run
  • It should be able to meet the load’s fluctuation rapidly
  • It should be able to start quickly
  • An ideal boiler should occupy a small floor space

Why Should We Buy From You, Not Other Coal fired Boiler Manufacturers?

Yongxing’s main product is coal fired boiler. We currently boast of over 40 years of experience in the boiler manufacturing industry. Our dedication to excellence has propelled us into the list of the best coal boiler manufacturers in China.

The prices of Yongxing’s coal burning boiler system are pretty affordable compared to the costs of our competitors. We have also guaranteed the quality of our coal fired boilers by incorporating several features, including;

  • Installing the steam economizer at the boiler’s rear end to improve the efficiency of the boiler
  • Equipping our boilers with the forced draft fan which suppliers sufficient air volume to the pulverized coal fired boiler furnace
  • Installing a cutting-edge slag removal chamber that helps you to remove slag automatically without much effort

Unlike most of Yongxing’s competitors, we offer free customization for any parts of your coal boiler. As our customer, you are welcome to visit our boiler factory anytime. The factory is located near Zhengzhou Airport. If it is your first time in China, our staff will pick you up from the airport and take you by car to our factory. As an established coal fired boiler manufacturing Company, Yongxing values its customers and is willing to provide complete deluxe guidance.


Our highly-trained customer support staff will provide a complete coal fired boiler specification guide in an instant. Send Your Inquiry Now.

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