CN201245671Y - Novel catenary dome ceramic combusting device hot-air furnace - Google Patents

Abstract

The utility model relates to a new catenary vault ceramic burner hot blast stove, which effectively solves the problems of hot blast stove combustion vibration and uneven air distribution. , the vault is placed on the upper part of the ceramic burner, and the ceramic burner is placed in the upper part of the furnace body. There are combustion chambers and regenerators in the furnace body. There is a cold air chamber at the bottom of the furnace body. The furnace body between the cold air chamber and the regenerator is installed There is a grate, the furnace body at the cold air chamber has a flue gas outlet and a cold air inlet, the furnace body at the regenerator has a hot gas outlet, and the wall of the ceramic burner has a gas distribution ring and a combustion air distribution ring , perpendicular to the two rings, there are gas nozzles and combustion-supporting air nozzles respectively, and the two kinds of nozzles are evenly distributed along the circular intersection of the inner wall of the furnace. There are combustion-supporting air inlet pipes perpendicular to the outer wall of the air distribution ring, which has good economic and social benefits.

Description

Novel catenary vault ceramic burner hotblast stove

One, technical field

The utility model relates to hotblast stove, particularly a kind of novel catenary vault ceramic burner hotblast stove.

Two, background technology

Hotblast stove is the ironmaking common equipment, the Cowper stove that has the combustion chamber gas well at present uses more in the medium and small blast furnace iron manufacturing process, its ubiquitous problem is the instability of gas well formula combustion chamber flow field structure and the burning that causes concussion (pulsation), and the combustion gas flowing that the makes progress uneven distribution that the back causes because of constitutional features of turning back, thereby influence heat-transfer effect and thermal stress distribution inequality in the regenerator.In addition, also there is the air-flow problem of short-circuit in the partition wall between gas well combustion chamber and the regenerator.Therefore, structure how to transform the type hotblast stove with obtain whole furnace type structure rationally, steady air current and being evenly distributed and good heat transfer and combustion efficacy, be an imperative job.

Three, utility model content

At above-mentioned situation, for overcoming the prior art defective, the purpose of the utility model just provides a kind of novel catenary vault ceramic burner hotblast stove, can effectively solve the Combustion of Hot Air Furnace concussion, air-flow problem pockety, the technical scheme of its solution is, comprise vault, ceramic burner, combustion chamber and regenerator, the catenary body is arranged at vault top, sidepiece has hot-blast outlet, vault places ceramic burner top, ceramic burner places body of heater (body of wall, as follows) in the top, form the combustion chamber between vault and ceramic burner and upper of furnace body, the body of heater of ceramic burner bottom surrounds regenerator, bottom of furnace body has cold air chamber, in the body of heater between cold air chamber and the regenerator fire grate is housed, to support the heat storage of placing in the regenerator, have exhanst gas outlet and cold air inlet on the body of heater at cold air chamber place, on the body of heater at regenerator place heat outlet is arranged, there is combustion gas (as coal gas) to distribute circuit and combustion air to distribute circuit in the body of wall of ceramic burner, be furnished with respectively on vertical combustion gas distribution circuit and the combustion air distribution circuit and be communicated with dozens of combustion gas spout and combustion air spout upwards, two kinds of spouts are along inboard wall of furnace body traffic circle uniform distribution, on the outer body of wall of ceramic burner combustion gas distribution circuit vertical with it fuel gas inlet pipe is arranged, on the exterior wall of combustion air distribution circuit vertical with it combustion air inlet tube is arranged, the utility model structure is unique and novel, solving air-flow effectively mixes, steady air current, the air-flow uniform distribution, key issue with combustion processeses such as smoke pre-heatings, realize flame stabilization, improve intensity of combustion, prevent the burning concussion, improve heat-transfer effect, thereby improve hotblast stove efficient, strengthen the Load Regulation function, guarantee the safety and stablization of operation, realize fuel saving, save the target of investment.Based on the application of rational thermally-stabilised structure, make that effectively prolonged the work-ing life of hotblast stove, good economy and society benefit is arranged.

Four, description of drawings

Fig. 1 is a structural profile front view of the present utility model.

Fig. 2 is that the utility model ceramic burner part B-B is to sectional view.

Five, embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.

By Fig. 1, Fig. 2 provides, the utility model comprises vault, ceramic burner, combustion chamber and regenerator, catenary body 8 is arranged at vault 16 tops, sidepiece has hot-blast outlet 9, vault places ceramic burner A top, ceramic burner A places body of heater (body of wall, as follows) in 1 top, form combustion chamber 7 between vault and ceramic burner and body of heater 1 top, the body of heater of ceramic burner bottom surrounds regenerator 3, bottom of furnace body has cold air chamber 4, fire grate 17 is housed in the body of heater between cold air chamber and the regenerator, to support the heat storage of placing in the regenerator, have exhanst gas outlet 5 and cold air inlet 6 on the body of heater at cold air chamber place, heat outlet 19 is arranged on the body of heater at regenerator place, said ceramic burner is, there is combustion gas to distribute circuit 13 and combustion air to distribute circuit 10 in the burner body of wall, be furnished with respectively on vertical combustion gas distribution circuit and the combustion air distribution circuit and be communicated with dozens of combustion gas spout upwards 15 and combustion air spout 14, two kinds of spouts are along inboard wall of furnace body traffic circle uniform distribution, on the outer body of wall of ceramic burner combustion gas distribution circuit vertical with it fuel gas inlet pipe 11 is arranged, on the exterior wall of combustion air distribution circuit vertical with it combustion air inlet tube 12 is arranged.

In order to guarantee result of use, said body of heater 1 is a round shape, refractory masses 2 is arranged on the inboard wall of furnace body, there is protective layer 18 outside, said vault 16 constitutes furnace roof, be supported on by furnace roof, ceramic burner A and constitute combustion chamber 7 on the body of heater, make it and regenerator 3 external furnace bodies between form the structure that can move freely separately, be convenient to maintenance and other hotblast stoves improved.

The combustion gas of said ceramic burner A distributes circuit and combustion air to distribute circuit to be oblique spiral placing in the burner body of wall in Different Plane, the combustion air spout that the combustion gas spout of combustion gas distribution circuit and combustion air distribute circuit is to the inherent same anchor ring intersection in combustion chamber evenly distributed (the combustion gas spout is the outlet of combustion gas jet pipe, and the combustion air spout is the outlet of combustion air jet pipe).

Said combustion chamber 7 inwalls have through the refractory brick layer, and the thick annular preformed layer of 300mm of high temperature steel reinforced concrete cast is arranged at body of heater 1 top.

Show that by said structure the utility model and the existing catenary burning type hot-air furnace that inclines is compared, and has following remarkable advantage:

1, combustion gas, air vertically upward spray, and by means of high temperature gases recirculating it are carried out high temperature preheating in hotblast stove, and the staggered injection of warp mixes it cmpletely and burns, and reaches sufficient combustion, the purpose that temperature of combustion is high;

2, combustion gas, air vertically upward spray afterfire, under the effect of hotblast stove vault, turn back, the all downward comparatively uniformly hot gas flow of formation temperature and velocity distribution, then enter the top of hotblast stove heat storage, thereby heat storage is heated evenly, effectively improve the heat storage utilization ratio, thereby increase unit heat storage exchange capability of heat, help realizing the processing requirement of high hot blast temperature and low-heat wind-warm syndrome degree velocity of variation;

3, the backflow flow field that utilizes the air-flow of turning back with cooperate appropriate chamber structure, can form stable flow field structure, and make combustion processes more stable, effectively avoid the concussion problem of burning, strengthen the heat load adjustment ability of combustion chamber, can realize hotblast stove safety, stable, heavy-duty service;

4, owing to adopt combustion gas and combustion air to intersect the vertical spray of going up respectively, jet-flow burns in mixing with airstream, has effectively avoided combustion processes generation tempered possibility, has improved the security that stove operation moves;

5, because the high heat load running status can be adopted in the combustion chamber, gas mark attitude flow velocity can be chosen bigger numerical in the heat storage, thereby strengthen the heat-transfer intensity between heat storage and air-flow, and then effectively reduce the weight of the heat storage material of unit blast volume, saved the initial cost of hotblast stove effectively;

6, adopt the vault of catenary domes, reduced the curvature of top vault, have good force structure and stability, can effectively increase the work-ing life of hotblast stove;

7, burner is arranged on the base portion of vault and constitutes integrally formed combustion chamber with it and forms, no matter because its body of wall all is in identical thermal steady state at combustion period or in the air-supply cycle, very helps hotblast stove and stablizes long lifetime ground operation;

8, the combustion chamber composition is designed to be supported by furnace shell, effectively it is separated with the heat storage big-wall, between cooperate labyrinth type slippage seam to connect, not interrupted with moving up and down of guaranteeing the heat storage big-wall temperature cycle variation causes in operational process, effectively prolong body of heater work-ing life;

9, combustion gas and air distribute circuit all to be arranged on outside the body of heater big-wall, no matter make it at combustion period or in the air-supply cycle, all can remain on not high state of temperature and change lessly, guarantee that its running status is good;

10, the combustion gas of burner and air outlet nozzle part be subjected to radiation of burner hearth and variations in flow to influence temperature variation bigger, after employing nozzle top is provided with the pre-mixing circular channel that can have the expansible square-section by oneself, just can effectively overcome this problem; This circuit can also play and add the effect that blast air mixes, uniform air flow distributes, thereby combustion processes is further improved;

11, the inlet pipe of combustion gas circuit and air circuit is tangential the access, perhaps adopt the air-flow uniform device to make and arrange evenly that separately staggered tens outlet nozzle Guan Zhongneng obtain mean error less than ± 5% velocity distribution, thereby improving circumferential air-flow mixes, improve the homogeneity that air-flow distributes, thus whole burning and the heat transfer efficiency of improving;

12, can transform old-fashioned Cowper stove,, keep the transformation of carrying out novel furnace on the basis of whole furnace shell only dismantling original vault wall brick and part big-wall promptly at the burn Cowper stove of gas well of old-fashioned having.That is:

Gas well wall in the former Cowper stove is dismantled, and one section big-wall on vault and stove top is dismantled, and stays about 80% big-wall; In chamber of hot-blast stove, increase a ring 114 light cinder bricks then, increase by a ring 230mm heavy brick again as improved hotblast stove main body big-wall, when former hotblast stove main body is torn open to 80% place, handle the upper surface of body of wall smooth, burn to annotate the annular preformed layer of the thick about 300mm of a circle with the high temperature steel reinforced concrete, this preformed layer is to be cast in former hotblast stove fully through above the big-wall of harmomegathus, stable in properties for many years; This preformed layer will bear the combustion chamber part load as the brace foundation of circuit wall under the burner; This part circumferentially is reserved with dilatation joint, circumferentially free expansion, utilize original vault supporting steel frame, supporting steel frame as combustion chamber vault and burner, the load of top circuit big-wall and vault is supported on this position substantially, reset annular burner, comprise: the distribution of air flow circuit and the burner nozzle of combustion air and combustion gas, to move on the former stove hot-blast outlet position, fuel gas inlet, gas inlet is also changed to top from the bottom, changes the fire grate of former stove into the 30mm aperture by the 40mm aperture, and the seven apertures in the human head checker brick in the 40mm aperture that former stove is adopted change the 19 hole checker brick in 30mm aperture into.

It is rational in infrastructure, stable to pass through improved hot-blast furnace body, and heating-surface area increases pact and can add about 45%; The checker brick weight of heat storage has increased more than 15%, effectively reduces flue gas and gets rid of temperature, thereby improve thermo-efficiency.

The utility model hot blast temperature can improve more than 100 ℃, provides very favourable condition for saving burnt volume increase; (one ton of iron of 10 ℃ of wind-warm syndrome of every routinely raising can be saved 1 kilogram of coke and calculate, can save 10 kilograms in coke for 100 ℃, blast furnace by annual 1000000 tons of iron goes to calculate so, but the Yin Jiejiao expense will be 1000 * 3000 yuan/ton=30000000 yuan of 1000000 tons * 10 ÷ (coke is by 3000 yuan of/ton calculating of present price) in every year)

Because the temperature and the velocity distribution in hot-blast stove fume flow field are even, the problem of thermal stress distribution inequality can not appear in the checker brick heat storage, just local checker brick can not occur yet and damage in advance; Excellent stability can guarantee operation steady in a long-term, and running cost is low, and low nearlyer 50% than the expense of newly-built other furnace type structure simultaneously, comprehensive benefit is very remarkable.

In a word, the utility model be a kind of have catenary arch form furnace roof and have be arranged on being circular layout and vertically upward spraying the top combustion stove of type burner of vault bottom.It absorbed Ka Lujin type hotblast stove on put the constitutional features of combustion chamber and Huo Gewen type hotblast stove the up back of combustion gas flowing vault turn back and enter the flow performance of heat storage; And improve the ceramic burner structure of above-mentioned two kinds of type of furnaces, adopt the vault bottom that the burner structure that annular goes up spray is set, the realization combustion gas flowing makes progress earlier in the combustion chamber and afterwards turns back downwards, thereby form gyration airflow and play the effect of spraying combustion gas and combustion air in the preheating, effectively avoided the unsettled shortcoming of gas well combustion chambers burn process simultaneously; The pre-mixing gas combustion on top, Ka Lujin type Combustion of Hot Air Furnace chamber and the settling chamber of air have been cancelled, make that hotblast stove top combustion chamber structure is effectively simplified, increase the intensity and stability of top construction, and made the combustion chamber useful volume of identical furnace wall area increase; Since combustion gas flowing the up of combustion chamber with turn back, have time enough to realize thorough mixing, preheating and the burning of combustion gas and air, thereby the combustion chamber has been played the settling chamber of Ka Lujin type hotblast stove and the effect of combustion chamber simultaneously; Because Ka Lujin type Combustion of Hot Air Furnace chamber is the flow field structure of a gradually expanded form, must adopt the swirling eddy flow field for the stable and incendiary of air-flow is stable, the combustion gas flowing that consequently enters heat storage distributes quite inhomogeneous, and the combustion gas flowing of new texture can formation be similar to mobile flow field structure in the pipe under the effect of gyration airflow after turning back, and the homogeneity of its distribution is greatly improved.Therefore, be a kind of multiple hotblast stove premium properties that integrates, have simple in structure, mobile, heat transfer and the good novel hotblast stove of combustionproperty.

Claims (5)

1. A novel catenary vault ceramic burner hot blast stove, comprising a vault, a ceramic burner, a combustion chamber and a regenerator, characterized in that a catenary body (8) is arranged on the top of the vault (16), There is a hot air outlet (9) on the side, the vault is placed on the upper part of the ceramic burner (A), the ceramic burner (A) is placed in the upper part of the furnace body (1), and the vault is connected to the ceramic burner and the upper part of the furnace body (1). Combustion chamber (7), the furnace body at the lower part of the ceramic burner forms a regenerator (3), the bottom of the furnace body has a cold air chamber (4), and the furnace body between the cold air chamber and the regenerator is equipped with a grate ( 17), to support the regenerator placed in the regenerator, the furnace body at the cold air chamber is provided with a flue gas outlet (5) and a cold air inlet (6), and the furnace body at the regenerator is provided with a hot gas outlet (19 ), the said ceramic burner is that there are gas distribution rings (13) and combustion air distribution rings (10) in the burner wall, and vertical gas distribution rings and combustion air distribution rings are respectively arranged with connected upward Dozens of gas nozzles (15) and combustion-supporting air nozzles (14), the two kinds of nozzles are evenly distributed along the circular intersection of the inner wall of the furnace, and there are gas inlet pipes (11) perpendicular to the outer wall of the ceramic burner gas distribution ring. ), there is a combustion air inlet pipe (12) perpendicular thereto on the outer wall of the combustion air distribution ring. 2. The novel catenary dome ceramic burner hot blast stove according to claim 1, characterized in that the furnace body (1) is cylindrical, and there is a refractory material layer (2) on the inner wall of the furnace. Protective layer (18) is arranged on the outside. 3. The novel catenary dome ceramic burner hot blast stove according to claim 1, characterized in that said furnace top and ceramic burner (A) are supported on the furnace body to form a combustion chamber (7), so that It and the outer furnace body of the regenerator (3) form a structure that can move freely. 4. The novel catenary dome ceramic burner hot blast stove according to claim 1, characterized in that the gas distribution loop and the combustion air distribution loop of the ceramic burner (A) are inclined on different planes. Placed in the wall of the burner in a spiral manner, the gas nozzles of the gas distribution ring and the combustion air nozzles of the combustion air distribution ring cross and evenly arrange in the same ring surface in the combustion chamber. 5. The novel catenary dome ceramic burner hot blast stove according to claim 1, characterized in that the inner wall of the combustion chamber (7) has a layer of high-quality refractory bricks, and the upper part of the furnace body (1) has a heat-resistant Circular prefabricated floors poured in reinforced concrete.

Images