Principle of foldback hot blast stove

Hot blast stove working principle: Hot blast stove is bituminous coal, anthracite.

and biomass as fuel, burning in the furnace and releasing heat, heating the water in the pot barrel, and vaporizing it into steam. The water in the pot (pot tube) is constantly heated by the energy released by the combustion of fuel in the furnace chamber, the temperature rises and produces pressure steam, because the boiling point of the water rises with the increase in pressure, the pot barrel is sealed, water vapor.

The expansion in the inside is limited and the pressure is generated to form thermal power (strictly speaking, the water vapor of the hot blast stove is formed by the water being heated at a constant pressure in the pot barrel until the saturated water is vaporized), which is widely used as an energy source. The hot blast stove is mainly composed of two main bodies, the pot shell and the furnace bulb, and the accessories to ensure its safe, economical and continuous operation, instrument auxiliary equipment, automatic control and protection systems. This kind of hot blast stove is a pot barrel type hot blast stove with water cooling, and two return smoke pipes are arranged in the left and right divisions in the pot barrel, and the front smoke box at the front of the pot barrel is turned back.

Between the pot barrel and the lower connecting box, there is a descending pipe and a water-cooled bib pipe, which constitute the frame of the combustion chamber. There is soda on the top of the pot.

Separator to reduce the amount of water carried out by the water vapor. The heating surface of the pot body is the lower part of the pot barrel, the water-cooled pipe (rising pipe) and the threaded smoke pipe (fire pipe). The basic components of coal-fired steam hot blast stove can be roughly divided into two aspects: main components and auxiliary equipment.

The main components of the hot blast stove are:

1. Furnace: ensure that the fuel of the hot blast furnace is burned out and the temperature of the outlet flue gas is cooled to the value that the convection heating surface can work safely;

2. Economizer.

The heat of the flue gas at the tail of the hot blast furnace is used to heat the feed water to reduce the exhaust gas temperature and save fuel.

3. Pot: connect the heating surfaces of the hot blast stove together and form a water circulation with the water wall and the descending pipe.

Circuit. The pot barrel stores steam and can adapt to load changes, and there is a steam water separation device inside to ensure the quality of the steam and water, and the DC hot blast stove has no pot barrel.

4. Water wall (rising tube): the main radiant heating surface of the hot blast furnace, absorbing the radiant heat of the furnace, heating the working fluid, protecting the furnace wall, etc.

5. Combustion equipment: send the fuel and the air required for combustion into the furnace and make the fuel fire stable and burn well;

6. Air preheater.

Heating of the air used in the fuel to enhance ignition and combustion; Absorb the waste heat of flue gas, reduce the exhaust gas temperature, and improve the efficiency of the hot blast furnace.

7. Furnace wall: It is the protective shell of the hot blast furnace, which plays the role of sealing and heat preservation. The heavy-duty walls of small hot blast stoves can also be used to support hot blast furnace components.

8. Framework: support and fix the hot blast furnace components, and the auxiliary equipment of the hot blast furnace mainly includes:

1. Induced air equipment: through the induced centrifugal fan.

and the chimney sends the flue gas generated during the operation of the hot blast stove to the atmosphere.

2. Dust removal equipment: remove the fly ash in the flue gas of the hot blast furnace.

3. Fuel equipment: storage and transportation of fuel functions.

4. Water supply equipment: The water supply pump will send the water treated by the water treatment equipment to the hot blast furnace.

5. Dust and slag removal equipment: remove ash from the hot blast furnace and transport it away.

6. Air supply equipment: The air heated by the air preheater is transported to the furnace and coal grinding device through the blower.

7. Automatic control equipment: automatic detection, program control, automatic protection and automatic adjustment.

When the cyclone hot blast furnace is working, the fuel is burned in the furnace body ** combustion chamber, and the high-temperature flue gas produces swirl, which passes through a plurality of flue gas interlayers, releases heat, reduces the temperature, and finally is extracted by the induced draft fan and discharged to the sky through the dust collector, and the cold air enters the air interlayer from the top annular port of the cyclone hot blast stove after many times of up and down flow, and the flue gas is fully heated, especially in the furnace ** absorbs a large amount of radiant heat, the temperature rises to the maximum, up to 300, and then sent out from the hot air discharge outlet.

Chunxiao company's household heating hot blast stove household heating hot blast stove is our company's latest research and development of the latest energy-saving heating equipment in winter, belongs to the latest environmental protection and energy-saving products, a wide range of use, suitable for families, rural residences, stores, schools, workshops and offices and other need to use this product. The market prospect is very broad, the investment is small, the market is large, and the return is high, which can save high winter heating costs, and the one-time investment will benefit for life. Now the company is looking for partners across the country, as well as first-class dealers, and those who do not have lofty goals and advanced business philosophy are not required to talk.

The top-fired hot blast furnace with hot blast channel belongs to the iron and steel metallurgical ironmaking equipment. Its purpose is to solve the problems of short life, small heat storage area and low air temperature of the internal combustion hot blast furnace, especially the top combustion hot blast furnace has many openings on the roof, the hot air valve position is high and the life is short, and the internal combustion hot blast furnace is transformed into the existing hot air main pipe and burner is not well arranged. The technical characteristic of the present invention is that a hot air channel is built in the hot blast furnace, with a flared ceramic short-flame burner, which is installed in the center of the hot blast furnace vault, or with 2-4 cylindrical ceramic short-flame burners, which is installed in the cylindrical part under the vault.

The present invention is most conducive to the technical transformation of the existing internal combustion hot blast furnace.

The MBL direct coal-fired hot blast furnace consists of an MBL coal-fired machine, a high-temperature gas purification chamber and a mixed air chamber. This device adopts a coal-fired machine as a primary heating, the raw (bituminous) coal is added to the coal hopper located at one end of the coal-burning machine through the coal loader, and the coal seam of a certain height is sent into the combustion chamber of the coal-burning machine at a uniform speed by the chain grate, and under the effect of the combustion fan, the high-temperature semi-gas produced by the coal burning is sprayed out from the side outlet of the coal-burning machine into the high-temperature gas purification room. The high-temperature gas purification chamber is made of refractory masonry, and the high-temperature semi-gas is re-burned in the purification chamber, and a small amount of dust entrained in the coal-burning process is polymerized and settled at high temperature in the purification chamber.