Top burning hot blast stove with slope-ladder shaped circumferential loop up-spraying ceramic combustor

The invention relates to a top burning hot blast stove which comprises a corded type circumferential loop upper spraying ceramic combustor, which can effectively solve the problems of short service life and uneven air flow and nozzle existing pressure. The structure is that a coal gas preheating loop and a combustion air preheating loop are respectively communicated with a coal nozzle and an air nozzle which are staggered in loop on the upper portion, the coal gas preheating loop and the combustion air preheating loop take on a symmetric corded form, and are arranged in the wall body of the combustor, a circumferential loop preheating channel is arranged on the top wall body of the combustor, and is communicated with the coal gas nozzle and the air nozzle, a coal gas inlet which is communicated with the coal gas preheating loop is arranged on the external wall body, the lower portion of the coal gas preheating loop is a combustion air preheating loop, and a combustion air inlet which is ...

Ceramic combustor with sloping-ladder-shaped circumferential ring upwards nozzle

The invention relates to a ceramic burner with inclined scalariform circumferential loops and upward nozzles, which can effectively solve the problems that the service life of a burner is short, the pressure of the airflow and a jet tube is not even. The structure of the ceramic burner is as follows: a fuel gas preheating loop and a combustion air preheating loop are respectively communicated with fuel gas spouts and air spouts which are staggered on the fuel gas preheating loop and a combustion air preheating loop in an annular shape; the fuel gas preheating loop and the combustion air preheating loop are symmetrically arranged in the wall of the burner in inclined scalariform; the wall of the top of the burner is provided with a circumferential annular preheating channel which is communicated with the fuel gas spouts and the air spouts; the outside of the wall of the burner is communicated with a fuel gas inlet of the fuel gas preheating loop; the combustion air preheating loop is positioned ...

Production process for producing spongy iron by dry coal powder gasification in high furnace

The invention belongs to the metallurgical chemistry technology, in particular to a technology for producing sponge iron by a dry coal powder gasification shaft furnace. Primary reduction gas is produced from dry coal powder and oxygen by a gasification furnace and desulfurization and slag-tap are carried out inside the gasification furnace. The primary reduction gas is cooled, removed dust in a dry way and heated. A part of synthetic gas is sent to the coal powder gasification furnace after wet desulfurization and pressurization, and the other part of the primary reduction gas is sent to a heating section. The primary reduction gas is heated by a partial oxidation process to obtain reduction gas. The reduction gas, lump ore and pellet ore are put into an input shaft furnace respectively. The lump ore and the pellet ore are reduced into the sponge iron in the shaft furnace. Coal gas from the shaft furnace is washed and then pressure energy is recycled by TRT. The invention can produce the ...

Production method for producing spongy iron by dry coal powder gasification high furnace

The invention belongs to metallurgical chemistry technology, in particular to a method for producing sponge iron by a dry coal powder gasification shaft furnace. Primary reduction gas is produced from dry coal powder which is crushed and dried in a coal pulverizer and oxygen by a gasification furnace. The produced primary reduction gas is cooled, removed dust, desulfurized and reheated. After thepressure of the primary reduction gas is reduced by turbine expansion power generation, the primary reduction gas is sent to a heating section to obtain reduction gas after being heated by a partial oxidation process. The reduction gas, lump ore and pellet ore are put into an input shaft furnace respectively. The lump ore and the pellet ore are reduced into the sponge iron in the shaft furnace. Then, coal gas from the shaft furnace is washed and then is output to a coal gas pipe net, or the coal gas is reheated and then put into the shaft furnace. The invention not only overcomes the limitation ...

Smelting reduction furnace coal-injection process

Method for producing directly reduced iron from coal

The invention discloses a method for producing directly reduced iron from coal. A technical process that CO is taken as main reducing gas for producing the directly reduced iron is adopted. The reducing gas is led into a reducing vertical furnace to carry out the reducing reaction with iron-containing raw materials to generate the directly reduced iron, much CO2 in the furnace top gas discharged from the reducing vertical furnace is modified into CO by adopting the reducing reaction, the CO is mixed with the reducing gas, and then, the mixed gas enters the reducing vertical furnace for reacting. In the invention, a carbon-based packed bed is used for modifying the top gas of the reducing vertical furnace, the modified gas component can meet the requirements of the reducing vertical furnace for the reducing gas, the fuel of the process route is coal, the CO2 gas is discharged by the system, and the coal energy can be fully used, thereby achieving a theoretical minimum value of unit consumption ...

Production process for producing spongy iron by dry coal powder gasification high furnace

The invention belongs to metallurgical chemistry technology, in particular to a technology for producing sponge iron by a dry coal powder gasification shaft furnace. Primary reduction gas is produced from dry coal powder and oxygen by a gasification furnace and desulfurization and slag-tap are carried out inside the gasification furnace. The primary reduction gas is cooled, removed dust in a dry way and heated. A part of synthetic gas is sent to the coal powder gasification furnace after wet desulfurization and pressurization, and the other part of the primary reduction gas is sent to a heating section. The primary reduction gas is heated by a partial oxidation process to obtain reduction gas. The reduction gas, lump ore and pellet ore are put into an input shaft furnace respectively. The lump ore and the pellet ore are reduced into the sponge iron in the shaft furnace. Coal gas from the shaft furnace is washed and then pressure energy is recycled by TRT. The invention can produce the sponge ...

Top burning hot blast stove with slope-ladder shaped circumferential loop up-spraying ceramic combustor

Charging method of reducing coal gas for gas-based reduction shaft furnace

The invention relates to a charging method of reducing coal gas for a gas-based reduction shaft furnace, which is characterized by charging the reducing gas into the furnace by sections. In the invention, the reducing coal gas is charged into the shaft furnace by sections, the quantity of reducing gas entering hot reducing gas from the middle reducing section of the shaft furnace is reduced, the scale and the energy consumption of the heating of a tube furnace and the temperature increase by oxygen blowing of part of oxidation furnaces are reduced, And the sensible heat of hot liquid direct reducing iron is fully utilized and exchange heat with cold reducing gas, therefore, cooling gas minor cycle equipment arranged outside the cooling section of the shaft furnace in the prior is omitted, the carbon content of sponge iron is increased, and the energy consumption in subsequent steelmaking process is reduced. Meanwhile, the hot reducing gas entering the reducing section of the shaft furnace ...

Cascade hydropower station interval flow calculation method and device

The invention discloses a cascade hydropower station interval flow calculation method and device, and the method comprises the steps: analyzing the hydrological characteristics and the production and confluence law in a drainage basin, and eliminating the violent fluctuation of the interval flow in a non-flood period through the multi-point moving average based on water balance; meanwhile, the interval flow negative value is replaced in a linear interpolation or multi-year monthly average mode, the real natural confluence and production process is restored as far as possible, a complete, reliable and reasonable interval runoff calculation result is obtained, and basic data guarantee is provided for drainage basin reservoir group dispatching operation, water resource configuration and management and the like.

Production method for producing spongy iron by dry coal powder gasification high furnace

The invention belongs to metallurgical chemistry technology, in particular to a method for producing sponge iron by a dry coal powder gasification shaft furnace. Primary reduction gas is produced from dry coal powder which is crushed and dried in a coal pulverizer and oxygen by a gasification furnace. The produced primary reduction gas is cooled, removed dust, desulfurized and reheated. After the pressure of the primary reduction gas is reduced by turbine expansion power generation, the primary reduction gas is sent to a heating section to obtain reduction gas after being heated by a partial oxidation process. The reduction gas, lump ore and pellet ore are put into an input shaft furnace respectively. The lump ore and the pellet ore are reduced into the sponge iron in the shaft furnace. Then, coal gas from the shaft furnace is washed and then is output to a coal gas pipe net, or the coal gas is reheated and then put into the shaft furnace. The invention not only overcomes the limitation ...

Ceramic combustor with sloping-ladder-shaped circumferential ring upwards nozzle