CN204787859U - High -efficient flue gas thermal -collecting tube of hot stove in ore deposit - Google Patents

Abstract

The utility model discloses a high -efficient flue gas thermal -collecting tube of hot stove in ore deposit, including the tube it builds layer and high temperature clay cloth coating by laying bricks or stones to have set gradually heat preservation layers of insulating fabric, insulating brick in the tube, the insulating brick is built the layer by laying bricks or stones and is built into the round wall body by laying bricks or stones by the mullite baked brick, is equipped with the dilatation joint on this wall body, and the dilatation joint intussuseption is filled with thermal -insulated fibre, the face heat side that the layer was built by laying bricks or stones to the insulating brick is located to high temperature clay cloth coating, the tube is located to the heat preservation layers of insulating fabric and the insulating brick is built by laying bricks or stones between the layer. The mullite baked brick is hexahedron structure, and its transversal trapezoid cross section of personally submitting is provided with the heat preservation recess and the protruding muscle that keeps warm respectively at the both sides face that the mullite baked brick is relative. Building by laying bricks or stones respectively with the heat preservation recess and the mutual joggle of protruding muscle that keeps warm on the plane of mullite baked brick adjacent in the layer is built by laying bricks or stones to the insulating brick. Not only thermal insulation properties is excellent for this high efficiency flue gas thermal -collecting tube, long service life, and the sound construction, the site operation operation of being convenient for. Be applicable to in the hot stove waste heat power generation system's in ore deposit the high temperature flue gas transport.

Description

Mineral hot furnace high effective flue gas thermal-collecting tube

Technical field

The utility model relates to the recycling of mineral hot furnace waste heat, and the structure particularly relating to mineral hot furnace high-temperature flue gas carrier pipe is improved.

Background technology

Mineral hot furnace is that one is of many uses, pattern is numerous, and the high energy consumption industrial furnace that can work continuously, be mainly used in the production of the ferroalloys such as ferrosilicon, ferromanganese, ferrotungsten and silicomangan.Mineral hot furnace can produce a large amount of high temperature and pollute flue gas when producing, the heat energy that flue gas is taken away is equivalent to input 40%-50% of the whole heat energy of mineral hot furnace, and fume afterheat temperature is higher, belongs to high-grade waste heat.The direct discharge of high-temperature flue gas not only can cause the pollution to environment, and wastes a large amount of heat resources.

Mineral hot furnace afterheat generating system utilizes waste-heat recovery device mineral heating furnace flue to be produced power steam to produce electric energy to drive generating set; electric power is back to production again; whole therrmodynamic system is not burnt any primary energy; not only cost of electricity-generating is low; be conducive to the economic benefit improving enterprise, and very positive effect is played to ecological environmental protection.In existing mineral hot furnace electricity generation system, high-temperature flue gas enters the temperature of delivery line generally at about 800 DEG C from mineral hot furnace, and 500 DEG C will be down to by the temperature that the defeated heat pipe of flue gas is delivered to steam boiler entrance, output channel outside wall temperature is up to 100 DEG C, heat-energy losses reaches more than 30%, thus cause a large amount of losses of heat energy, then directly affect generated energy.

The structure of existing mineral hot furnace thermal-arrest conveyance conduit is in the shell that steel plate rolls, and directly burns note with heavy castable refractory and forms refractory insulating layer., there is thermal and insulating performance instability in this pouring heat insulating heat-insulation layer, due to the castable that insulating liner generally selects density heavier, the coefficient of heat conduction is comparatively large, mostly at more than 1.75W/m.k.And insulated pouring layer must cast-in-place shaping and maintenance baking, more by such environmental effects during construction, especially when roasting shaping, there is obvious thermograde in different casting area, the heat insulation layer after toasting is made to form layer structure, be easy to occur layering and crackle, cause the string of high-temperature flue gas thoroughly to exosmose, the corrosion of aggravation box hat outer wall, time serious, insulating liner is burnt down, box hat is grilled thoroughly, and has both caused the decline of the defeated thermal efficiency, affects again the service life of heat supply pipeline.Also there is construction trouble in the heat insulation layer that this cast is formed simultaneously, long in time limit, the defect of difficult quality guarantee.

Utility model content

For the above-mentioned deficiency existing for prior art, technical problem to be solved in the utility model is to provide that a kind of thermal and insulating performance is excellent, the mineral hot furnace high effective flue gas thermal-collecting tube of long service life.

In order to solve the problems of the technologies described above, mineral hot furnace high effective flue gas thermal-collecting tube of the present utility model, comprises shell, is disposed with insulation fibrage in described shell, layer built by laying bricks or stones by insulating brick and high temperature clay cloth coating; Described insulating brick is built layer by laying bricks or stones and is built into round body of wall by laying bricks or stones by mullite fired brick, this body of wall is provided with dilatation joint, is filled with heat insulation fiber in dilatation joint; High temperature clay cloth coating is located at the hot side, face that layer built by laying bricks or stones by insulating brick; Insulation fibrage is located at shell and insulating brick is built by laying bricks or stones between layer.

After adopting said structure, owing to being provided with insulation fibrage in shell, layer built by laying bricks or stones by insulating brick and high temperature clay cloth coating, the thermal conductivity factor forming the heat insulation fired brick of flue gas thermal-collecting tube agent structure is only 15% of castable, thermal conductivity factor is low, there is good heat preservation and insulation, and stable performance under the high temperature conditions, insulation fibrage and insulating brick is adopted to build the composite construction of layer by laying bricks or stones, effectively reduce high-temperature flue gas heat energy in flue gas thermal-collecting tube and, to the transmission outside pipe, greatly reduce the loss of heat energy.Building layer by laying bricks or stones due to insulating brick is again built by laying bricks or stones by mullite fired brick to form, coordinate simultaneously and be coated with the surface cloth of high temperature clay, not only increase mechanical strength and the thermal shock resistance of thermal-arrest carrier pipe, effectively can reduce temperature flowing flue gas to the erosion damage of thermal-collecting tube and erosion, and structure is more firmly stable, greatly extend the service life of thermal-collecting tube, also layer is built by laying bricks or stones because the agent structure of thermal-collecting tube have employed insulating brick, effectively reduce the overall weight of thermal-collecting tube on the one hand, the Unit Weight of heat insulation fired brick is only 1/4th of castable, alleviating of overall weight effectively alleviates collector tube holder load, reduce support materials, reduce costs.Adopt fired brick also to not only avoid the impact of environmental factor on construction quality, and scene build speed by laying bricks or stones soon, greatly can shorten construction period, have construction quality and stablize, the advantage of convenient construction.

Further embodiment of the present utility model, described mullite fired brick is hexahedron structure, and its cross section is trapezoid cross section, is respectively arranged with insulation groove and insulation convex tendon in the two sides that mullite fired brick is relative.Building by laying bricks or stones in plane respectively to be incubated groove and the mutual joggle of insulation convex tendon of mullite fired brick adjacent in layer built by laying bricks or stones by described insulating brick.The plane of building by laying bricks or stones of adjacent mullite fired brick is provided with the insulation convex tendon of mutual joggle and is incubated groove, make engagement between brick body tight, strong in conjunction with attachment force, good integrity, mutual joggle between brick body has more blocked high-temperature flue gas infiltration and has ganged up and to the fibrolaminar erosion of insulation, substantially increase the defeated thermal efficiency of discharge.

Preferred embodiment of the present utility model, described insulating brick is built layer by laying bricks or stones and is built by laying bricks or stones by the mullite fired brick fissure of displacement and form, and described dilatation joint is crisscross arranged along round body of wall circumference.Mullite fired brick adopts the fissure of displacement to build by laying bricks or stones, builds a layer good integrity by laying bricks or stones, sound construction, and the circumference of dilatation joint is crisscross arranged and can effectively prevents high-temperature flue gas from ganging up along the infiltration of dilatation joint.

Preferred embodiment of the present utility model, described dilatation joint vertically interval is arranged, and the seam of dilatation joint is wide is 10mm-20mm.The fibrolaminar thickness of described insulation is 5mm-60mm; The thickness that layer built by laying bricks or stones by described insulating brick is 50mm-230mm.This structure effectively can avoid the destruction of expanding with heat and contract with cold to thermal-collecting tube, have again good thermal and insulating performance, and the scope of application is wider.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, mineral hot furnace high effective flue gas thermal-collecting tube of the present utility model is described further.

Fig. 1 is the cross section structure schematic diagram of a kind of detailed description of the invention of the utility model mineral hot furnace high effective flue gas thermal-collecting tube;

Fig. 2 is the partial enlarged view of structure shown in Fig. 1;

Fig. 3 be structure shown in Fig. 1 pipe in along long to partial enlarged view;

Fig. 4 is the Facad structure view of mullite fired brick in structure shown in Fig. 1;

Fig. 5 is the side structure view of mullite fired brick in structure shown in Fig. 1.

In figure, 1-shell, 2-insulation fibrage, 3-insulating brick build layer, 4-high temperature clay cloth coating, 5-mullite fired brick, 6-dilatation joint, 7-insulation groove, 8-insulation convex tendon by laying bricks or stones.

Detailed description of the invention

In the mineral hot furnace high effective flue gas thermal-collecting tube shown in Fig. 1, Fig. 2, shell 1 is rolled by steel plate and forms, and is disposed with insulation fibrage 2 from outside to inside, layer 3 built by laying bricks or stones by insulating brick and high temperature clay cloth coating 4 in this shell 1.Insulation fibrage 2 for material, also can be containing insulation fibrous materials such as zirconium fibrages with the thick alumina-silicate ceramic fibre blanket of 30mm.Layer 3 built by laying bricks or stones by the insulating brick of the insulation fibrage 2 in shell 1 being built into round wall body structure by laying bricks or stones, and the thickness that layer 3 built by laying bricks or stones by this insulating brick is 150mm, preferably selects between 50mm-230mm, prioritizing selection 140mm-160mm according to thermal-collecting tube working condition.This insulating brick is built layer 3 by laying bricks or stones and is built by laying bricks or stones by mullite fired brick 5 and form, and mullite fired brick 5 not only has that thermal conductivity is low, and heat-insulating property is excellent, effectively can block the erosion of high-temperature flue gas and etchant gas, and site operation is convenient, and it is strong to build layer globality by laying bricks or stones, sound construction.Build layer 3 hot side by laying bricks or stones at the insulating brick be made up of mullite fired brick 5 and be coated with high temperature clay cloth coating 4, this high temperature clay cloth coating 4 can play the effect that layer brickwork joint built by laying bricks or stones by sealing insulating brick, prevent the infiltration of high-temperature flue gas from ganging up, further enhancing again the heat insulation effect that layer 3 built by laying bricks or stones by insulating brick, and degrading of fired brick face hotlist layer can be prevented, extend the service life of thermal-collecting tube.

As shown in Figure 3, along high effective flue gas thermal-collecting tube length direction at a certain distance, as 3 meters, the round body of wall of building layer 3 at insulating brick by laying bricks or stones is provided with dilatation joint 6, heat insulation fiber is filled with in this dilatation joint 6, to eliminate layer is built in the effect of expanding with heat and contract with cold by laying bricks or stones destruction to insulating brick, same heat insulation fiber of filling both silicic acid ceramic fibres also can be containing heat insulation fibrous materials such as zirconium fibers.The seam of dilatation joint 6 is wide is 15mm, preferably between 10mm-20mm, selects its size.Mullite fired brick 5 is built into insulating brick by laying bricks or stones with fissure of displacement structure and is built layer 3 by laying bricks or stones, and therefore dilatation joint 6 is also circumferentially crisscross arranged in pipe.

As shown in Figure 4, Figure 5, mullite fired brick 5 is in hexahedron structure, its cross section is trapezoid cross section, insulation groove 7 and insulation convex tendon 8 is respectively arranged with in relative bricklaying surface two sides, this insulation groove 7 is corresponding with insulation convex tendon 8 profile, the insulation convex tendon 8 of insulation groove 7 can engage each other joggle, when building by laying bricks or stones like this, adjacent mullite fired brick 5 build plane by laying bricks or stones respectively be incubated groove 7 and the mutual joggle of insulation convex tendon 8.

Claims (7)

1. a mineral hot furnace high effective flue gas thermal-collecting tube, comprises shell (1), it is characterized in that: in described shell (1), be disposed with insulation fibrage (2), layer (3) built by laying bricks or stones by insulating brick and high temperature clay cloth coating (4); Described insulating brick is built layer (3) by laying bricks or stones and is built into round body of wall by laying bricks or stones by mullite fired brick (5), and this body of wall is provided with dilatation joint (6), and dilatation joint is filled with heat insulation fiber in (6); The hot side, face that layer (3) built by laying bricks or stones by insulating brick is located at by high temperature clay cloth coating (4); Insulation fibrage (2) is located at shell (1) and insulating brick is built by laying bricks or stones between layer (3).

2. mineral hot furnace high effective flue gas thermal-collecting tube according to claim 1, it is characterized in that: described mullite fired brick (5) is in hexahedron structure, its cross section is trapezoid cross section, is respectively arranged with insulation groove (7) and insulation convex tendon (8) in the two sides that mullite fired brick (5) is relative.

3. mineral hot furnace high effective flue gas thermal-collecting tube according to claim 1 and 2, is characterized in that: building by laying bricks or stones in plane respectively to be incubated groove (7) and insulation convex tendon (8) joggle mutually of mullite fired brick (5) adjacent in layer (3) built by laying bricks or stones by described insulating brick.

4. mineral hot furnace high effective flue gas thermal-collecting tube according to claim 1, is characterized in that: described insulating brick is built layer (3) by laying bricks or stones and built by laying bricks or stones by mullite fired brick (5) fissure of displacement and form, and described dilatation joint (6) is crisscross arranged along round body of wall circumference.

5. the mineral hot furnace high effective flue gas thermal-collecting tube according to claim 1 or 4, is characterized in that: described dilatation joint (6) vertically interval is arranged, and the seam of dilatation joint (6) is wide is 10mm-20mm.

6. mineral hot furnace high effective flue gas thermal-collecting tube according to claim 1, is characterized in that: the thickness of described insulation fibrage (2) is 5mm-60mm; The thickness that layer (3) built by laying bricks or stones by described insulating brick is 50mm-230mm.

7. mineral hot furnace high effective flue gas thermal-collecting tube according to claim 6, is characterized in that: the thickness of described insulation fibrage (2) is 25mm-35mm; The thickness that layer (3) built by laying bricks or stones by described insulating brick is 140mm-160mm.