CN2514283Y - Burning-in kiln using gas more tran needed of blast furnace - Google Patents

Abstract

The utility model discloses a blast furnace surplus gas roasting kiln, which includes a surplus gas main pipe, a gas bustle pipe, a gas branch pipe valve, an air bustle pipe, an air branch pipe, a burner, a old air bustle pipe, a old air pipe value, a shell, a refractory and thermal insulation layer, a kiln cavity, a feed inlet and a support, wherein the burner is mounted in the central of the kiln cavity, the blast furnace surplus gas is introduced into the gas main pipe for fuel. The blast furnace surplus gas roasting kiln of the utility model can completely burn and use the surplus gas to avoid the serious pollution caused by atmospheric dilution, and to replace the existing roasting kiln using coal as fuel to avoid a large number of coal consumption and save the energy resources.

Description

Blast furnace surplus gas calcining kiln

The utility model is about a kind of iron-smelter blast furnace surplus gas calcining kiln, more particularly utilizes blast furnace byproduct coal gas to do fuel and also can regulate the calcining kiln of temperature.

The coal gas that existing iron-smelter blast furnace furnace roof is produced, after purified treatment, accumulation of heat filler in the heat hot wind furnace that is used to burn, but surplus capacity is very big.Relatively large iron-smelter is used for burning boiler heat supply etc., but a large amount of medium and small ironworks all is discharged, and except that causing serious air pollution, more causes the significant wastage of the energy.

The purpose of this utility model is to overcome the defective that prior art exists, and a kind of calcining kiln that utilizes surplus gas to do fuel is provided, and it can realize different ignition temperatures with the ratio of coal gas amount by adjustment air blast, air quantity, so that the different material of roasting.

This and other purpose of the present utility model will and be described by following detailed description and further embody and illustrate.

Blast furnace surplus gas calcining kiln of the present utility model, comprise the surplus gas house steward, the coal gas bustle pipe, the branch gas tube valve, the air bustle pipe, the air arm, burner, the cold wind bustle pipe, the cold wind pipe valve, shell, refractory insulating layer, the kiln chamber, discharging opening and pillar, wherein, bottom at calcining kiln has discharging opening, shore supports calcining kiln, the outside in kiln chamber is followed successively by refractory insulating layer and shell, middle part at the kiln body is equipped with burner, the gas main road is introduced the blast furnace surplus gas and is done fuel, and with coal gas by the coal gas bustle pipe, send in the burner through the branch gas tube valve, combustion air is sent in the burner through the air manifold valve by the air header valve.

Further, blast furnace surplus gas calcining kiln of the present utility model is equipped with 4 to 16 burners, and described burner is socketed to form with one heart by the coal gas chamber that has gas inlet on air lance and the wall; The mouth of pipe of coal gas chamber one end of burner links to each other with the outer wall of air lance and seals, and other end coal gas accent and air lance mouth substantially in one plane form spray combustion mouth, the negative pressure band that burner forms when spraying forced air by air lance at spray combustion mouthful place, coal gas in the coal gas chamber is extracted out and fully mixing, the burner level is passed kiln shell and refractory insulating layer, and will spray combustion mouth and be inserted into kiln cavity wall place.

In blast furnace surplus gas calcining kiln of the present utility model, fire hole is the straight tube that is built into by refractory material, and kiln shell and flame retardant coating are passed in burner bottom in the position, and angle is delivered on the spray combustion mouth for making kindling material; Be provided with 4～16 cooling air holes that the pipeline made by cast iron or steel forms at the salband place of kiln, kiln shell and refractory insulating layer are passed in the cooling air hole, and an end inserts the inwall place in kiln chamber, and the other end is connected with the cold wind manifold valve; By picking out the cold wind bustle pipe on the air header, and, be connected respectively on the cooling air port pick out the cold wind manifold valve identical by bustle pipe with cooling air port quantity.

Blast furnace surplus gas calcining kiln of the present utility model, can make surplus gas by fully burning utilization, both avoided entering atmosphere and caused severe contamination, replaced directly making at present a large amount of coal consumption of the kiln of comburant (-rent) again, saved the energy of coal, simultaneously, the more important thing is owing to can adjust ignition temperature arbitrarily not have flue gas when burning in addition, guarantee to send out by the product quality of roasting material, and can adapt to the roasting requirement of different material, realize that a kiln uses more.

Blast furnace surplus gas calcining kiln roasting lime stone of the present utility model is produced the personal lime of iron-smelter, to improve the capacity factor of a blast furnace, reduces and produces this; Roasting bauxite nugget is produced the bauxite sintering ore deposit, can improve the quality of products etc., the more important thing is and eliminates the pollution of blast furnace flue gas to atmosphere, effectively to preserve the ecological environment.

Below further specify the utility model by accompanying drawing and explanation thereof.

Fig. 1 is a cross-sectional schematic of the present utility model.

Fig. 2 is the nozzle enlarged diagram of burner.

Fig. 3 is a work schematic diagram of the present utility model.

In Fig. 1 and Fig. 2, symbol 1 is represented the surplus gas house steward, symbol 2 is represented check-valves, and symbol 3 is represented the coal gas main valve, and symbol 4 is represented the coal gas bustle pipe, symbol 5 is represented the branch gas tube valve, symbol 6 is represented air-blaster, and symbol 7 is represented the air header valve, and symbol 8 is represented the air bustle pipe, symbol 9 is represented the air arm, symbol 10 is represented burner, and symbol 11 is represented the cold wind bustle pipe, and symbol 12 is represented the cold wind pipe valve, symbol 13 is represented the cold wind hole, fire hole is peeped in symbol 14 representatives, and symbol 15 is represented shell, and symbol 16 is represented refractory insulating layer, symbol 17 is represented the kiln chamber, symbol 18 is represented discharging opening, and symbol 19 is represented pillar, symbol 20 representative point fire holes, symbol 21 is represented point for measuring temperature, and symbol 22 is represented material.

With reference to figure 1, blast furnace surplus gas calcining kiln of the present utility model, comprise surplus gas house steward 1, coal gas bustle pipe 4, branch gas tube valve 5, air bustle pipe 8, air arm 9, burner 10, cold wind bustle pipe 11, cold wind pipe valve 12, shell 15, refractory insulating layer 16, kiln chamber 17, discharging opening 18 and pillar 19, wherein, have discharging opening 18 in the bottom of calcining kiln, pillar 19 is supporting calcining kiln, the outside in kiln chamber 17 is followed successively by refractory insulating layer 16 and shell 15, be equipped with burner 10 at the middle part of kiln body, gas main 1 road is introduced the blast furnace surplus gas and is done fuel, and with coal gas by coal gas bustle pipe 4, send in the burner 10 through branch gas tube valve 5, combustion air is sent in the burner 10 through the air manifold valve by air header valve 7.

Further, blast furnace surplus gas calcining kiln of the present utility model is equipped with 4 to 16 burners, and described burner is socketed to form with one heart by the coal gas chamber that has gas inlet on air lance and the wall; The mouth of pipe of coal gas chamber one end of burner links to each other with the outer wall of air lance and seals, and other end coal gas accent and air lance mouth substantially in one plane form spray combustion mouth, the negative pressure band that burner forms when spraying forced air by air lance at spray combustion mouthful place, coal gas in the coal gas chamber is extracted out and fully mixing, the burner level is passed kiln shell and refractory insulating layer, and will spray combustion mouth and be inserted into kiln cavity wall place.

In blast furnace surplus gas calcining kiln of the present utility model, fire hole is the straight tube that is built into by refractory material, and kiln shell and flame retardant coating are passed in burner bottom in the position, and angle is delivered on the spray combustion mouth for making kindling material; Be provided with 4～16 cooling air holes that the pipeline made by cast iron or steel forms at the salband place of kiln, kiln shell and refractory insulating layer are passed in the cooling air hole, and an end inserts the inwall place in kiln chamber, and the other end is connected with the cold wind manifold valve; By picking out the cold wind bustle pipe on the air header, and, be connected respectively on the cooling air port pick out the cold wind manifold valve identical by bustle pipe with cooling air port quantity.

Concrete, in blast furnace surplus gas calcining kiln of the present utility model, refractory insulating layer 16 is built by laying bricks or stones on shell 15 inwalls by refractory brick and other high-temperature material, form kiln chamber 17, kiln chamber 17 is divided into from top to bottom gives tropical Y, high temperate zone G, combustion zone S and salband L, discharging opening 18 is in the lower end in kiln chamber 17, pillar 19 is welded on the kiln hood Lower Half, support whole calcining kiln weight and keep the vertical of kiln body and ground, fire hole 20 is made by cast iron, is built in flame retardant coating 16, leads directly to the combustion zone S into kiln chamber 17, point for measuring temperature 21 generally can have 2～4 and get final product, and requires to be inserted in respectively each humidity province in kiln chamber 17 according to measurement with thermocouple.And fetch on the purification gas main road by iron-smelter on the surplus gas house steward 1, be connected on the kiln shell coal gas bustle pipe 4 in one week of 15 outsides through check-valves 2 and coal gas main valve 3 then, branch gas tube and valve 5 total 6-16 are individual, one terminates on the coal gas bustle pipe 4, and one terminates on the gas entry c of burner 10; The wind outlet of air-blaster 6 is equipped with air header and valve 7, be connected with the air bustle pipe 8 that is trapped among kiln hood one week of 15 outsides, the quantity of air arm and valve 9 is identical with the quantity of branch gas tube and valve 5, one terminates on the air bustle pipe 8, the other end is connected on the air lance a of burner 10, forms the spray combustion mouthful d of bushing type burner 10.Burner 10 is built the combustion zone S place in refractory insulating layer 16 straight-through kiln chambeies 17, and peeping fire hole 14 is thin passages that are built into by refractory brick, generally has 2,3,4, block on the combustion zone top in kiln chamber 17 more nearby.

With reference to figure 2, burner 10 is by air lance a, coal gas chamber b and gas entry c form, wherein coal gas chamber b is a circular pipe, and an end is an opening, the outer wall disjunctor of the other end and air lance a and sealing, on its tube wall, have gas entry pipe c, like this, air lance a is inserted in the b of coal gas chamber and wants with one heart, forms spray combustion mouthful d.

With reference to figure 3, the utility model is like this operation: will be by roasting material 22 by funnel 29 truck 28 of packing into, and promote and pour into kiln chamber 17 at pulley 24 guiding lower edge truck tracks 25 by hoist engine 26 and stay cord 27, until keep kiln filling, by air blast 6 with air through the air header road, valve 7 is sent in the air bustle pipe 8, and enter the air lance a of burner 10 by air manifold valve 9, simultaneously, coal gas passes through surplus gas house steward 1 from the gas cleaning device of iron-smelter, through check-valves 2, coal gas main valve 3, enter coal gas bustle pipe 4, send into the gas entry c of burner 10 again by branch gas tube valve 5, enter then among the b of coal gas chamber, because air with pressure when air lance a spray, fully mixes with the coal gas extraction of coal gas chamber b and with air in the negative pressure of spray combustion mouthful d place generation.Operating personnel send into kiln chamber 17 with kindling material by fire hole 20, up to spray combustion mouthful d place, promptly finish igniting, in the burning of the combustion zone S place in kiln chamber 17.Operating personnel can be according to the temperature indication of the observation of peeping fire hole 14 and each point for measuring temperature 21, utilizes branch gas tube valve 5 and air manifold valve 9 to regulate the mixed proportion of air, coal gas and air pressure and adjusts ignition temperature, and are different from the requirement of roasting material to adapt to.

The material in S, G district is by roasting when qualified in kiln chamber 17, then from drain hole 18, emit the lower end material, make and burn till the salband L place that the material thing drops to kiln chamber 17, cooled off by the cold wind that cold wind hole 13 enters, from drain hole 18, emit again after the cooling from cooling bustle pipe 11 and cold wind manifold valve 12.Simultaneously, material 22 is constantly packed into from the kiln top.Charging constantly, roasting, the production process of emitting have been realized like this.

Claims (9)

1, a kind of blast furnace surplus gas calcining kiln, it is characterized in that comprising the surplus gas house steward, the coal gas bustle pipe, the branch gas tube valve, the air bustle pipe, the air arm, burner, the cold wind bustle pipe, the cold wind pipe valve, shell, refractory insulating layer, the kiln chamber, discharging opening and pillar, wherein, bottom at calcining kiln has discharging opening, shore supports calcining kiln, the outside in kiln chamber is followed successively by refractory insulating layer and shell, middle part at the kiln body is equipped with burner, the gas main road is introduced the blast furnace surplus gas and is done fuel, and with coal gas by the coal gas bustle pipe, send in the burner through the branch gas tube valve, combustion air is sent in the burner through the air manifold valve by the air header valve.

2, blast furnace surplus gas calcining kiln as claimed in claim 1 is characterized in that being equipped with 4 to 16 burners.

3, blast furnace surplus gas calcining kiln as claimed in claim 1 is characterized in that described burner is socketed to form with one heart by the coal gas chamber that has gas inlet on air lance and the wall.

4, blast furnace surplus gas calcining kiln as claimed in claim 1, the mouth of pipe that it is characterized in that its coal gas chamber one end of described burner links to each other with the outer wall of air lance and seals, and other end coal gas accent and air lance mouth substantially in one plane form spray combustion mouthful.

5, blast furnace surplus gas calcining kiln as claimed in claim 1 is characterized in that the negative pressure band that described burner forms when spraying forced air by air lance at spray combustion mouth place, and the coal gas in the coal gas chamber is extracted out and abundant the mixing.

6, blast furnace surplus gas calcining kiln as claimed in claim 1 is characterized in that described burner level passes kiln shell and refractory insulating layer, and will spray the combustion mouth and be inserted into kiln cavity wall place.

7, blast furnace surplus gas calcining kiln as claimed in claim 1 is characterized in that described fire hole is the straight tube that is built into by refractory material, and kiln shell and flame retardant coating are passed in burner bottom in the position, and angle is delivered on the spray combustion mouth for making kindling material.

8, blast furnace surplus gas calcining kiln as claimed in claim 1, it is characterized in that being provided with 4～16 cooling air holes that the pipeline made by cast iron or steel forms at the salband place of kiln, kiln shell and refractory insulating layer are passed in the cooling air hole, one end inserts the inwall place in kiln chamber, and the other end is connected with the cold wind manifold valve.

9, blast furnace surplus gas calcining kiln as claimed in claim 1 is characterized in that by picking out the cold wind bustle pipe on the air header, and picked out the cold wind manifold valve identical with cooling air port quantity by bustle pipe, is connected respectively on the cooling air port.

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