20t coal fired chain grate boiler in Pakistan

Recent days, Pakistan market have a large demand on chain grate boilers, They want coal used fire to chain grate boiler. One customer engaged in a big textile industry in Pakistan, he want to buy 20 ton coal fired chain grate boilers build in his new factory. We recommend him using our SZL 20 ton coal fired boilers for their production.aV7Horizontal boiler

20 ton coal fired boiler design:

ZG provide a nice design for coal fired boiler of Pakistan customer. SZL is double drum chain grate boilers. It has chain grate steam boiler and chain grate hot water boiler. Both of boiler have DZL and SZL types. We can provide either one for customers.The SZL coal fired chain grate boiler we provide for Pakistan clients, see below pic:aV7Horizontal boiler

20 ton chain grate coal fired boilers referenceaV7Horizontal boiler

SZL chain grate coal fired boilersaV7Horizontal boiler

Below one is DZL boiler,it is single drum with chain grate design and coal used fuels.aV7Horizontal boiler

DZL coal fired chain grate boilers.jpgaV7Horizontal boiler

DZL coal fired chain grate boilersaV7Horizontal boiler

How a 20 ton coal fired boiler working is a main question what clients caring about, here, I will talking about how a coal boiler working during production in briefly below: aV7Horizontal boiler

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The hot gases from the combustion process move from the bottom left to the top and then down the right hand side of the boiler structure. As the hot gas moves through the boiler it loses energy to the water and the gases becomes cooler as a result. There are various heat exchangers in the boiler which extract energy from the hot gases and transfer it to water. The following diagram shows the inner workings of a boiler. The numbers in the diagram are described below.aV7Horizontal boiler

how a coal boiler working.pngaV7Horizontal boiler

Coal fired boiler working principleaV7Horizontal boiler

aV7Horizontal boiler
Coal powder and air are blown into the boiler and combust to form a fireball.aV7Horizontal boiler

1. Cool feedwater enters the boiler at the bottom right.aV7Horizontal boiler
2.The feedwater is heated in the economizer by the warm exhaust gases exiting the boileraV7Horizontal boiler
3.The warm feedwater is sent to the steam drum aV7Horizontal boiler
4. where liquid water is separated from steam formed in the waterwall. In a super critical coal plant steam is not created. Liquid water becomes a supercritical fluid in the superheaters at a pressure of greater than 221 bar and a temperature of greater than 400C. Therefore there is no steam drum. In a supercritical boiler warmed feedwater passes directly into the downcomers. aV7Horizontal boiler
5.Liquid water flows down the downcomers on the outside of the boiler to the bottom of the boiler. aV7Horizontal boiler
6.Water flows up the tubes in the waterwalls of the boiler and surround the fireball of burning coal. The water in the tubes is heated by radiation from the fireball. Some of the water in these tubes turns into steam. aV7Horizontal boiler
7. The steam and water in the waterwall tubes is sent to the steam drum, where steam is separated from liquid water. Liquid water in the steam drum flows down the downcomers on the outside of the boiler. aV7Horizontal boiler
8.Steam from the steam drum is sent to the primary superheater. aV7Horizontal boiler
9. Steam is super heated to a high temperature and pressure in the primary superheaters and then moves to the secondary superheaters. aV7Horizontal boiler
10.In the secondary superheaters steam meets the very hot gases exiting the top of the boiler. The steam is heated to its final temperature and pressure before leaving the boiler as main steam. The main steam is sent to the high pressure steam turbine. The steam turbines drive a generator which produces electricity. aV7Horizontal boiler
11.Steam exiting the high pressure steam turbine is called cold reheat.aV7Horizontal boiler

It is reheated in the re-heater and sent back to the second steam turbine. By the time the flue gas exits the boiler most of the energy in the coal will be transferred to the water in the boiler. The hot gases are cleaned up before they are sent to a stack. Feed water is generally supplied by condensed steam from the low pressure steam turbine. Large amounts of cooling water are used to condense this steam into liquid water in the condenser.aV7Horizontal boiler

Contact with us for more information about 20 coal fired chain grate boiler, such as boiler price & cost, installation time, delivery time, payment ways etc. At email: [email protected]aV7Horizontal boiler

Or leave your boiler requirement details in below comment form. We will back to you within 24 hours.aV7Horizontal boiler

Tag: horizontal boiler,20,20t coal fired chain grate boiler in Pakistan, chain grate coal fired boiler in Pakistan

Why choose ZG boiler products?

We have a professional installation and after-sales staff,
We have the largest factories and production capacity,
We have a professional sales and service team.

Q: How much the price of 20t coal fired chain grate boiler in Pakistan?

A: We need know the details of 20t coal fired chain grate boiler in Pakistan, for example cpacity, pressure, etc, water tube boiler cost, please contact online service by click here

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