CN214666129U

CN214666129U - Heat accumulating type combustion device for industrial kiln

Info

Publication number: CN214666129U
Application number: CN202120731481.9U
Authority: CN
Inventors: 王茂军; 肖定为; 曹瑞华
Original assignee: Guangzhou Tesite Technology Co ltd
Current assignee: Guangzhou Tesite Technology Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-11-09
Anticipated expiration: 2031-04-12

Abstract

The utility model discloses a regenerative combustion device for industrial kiln, including furnace body, first regenerator and second regenerator, all install at least one regenerator in first regenerator and the second regenerator, the regenerator comprises at least two-layer corundum mullite heat accumulation layer, corundum mullite heat accumulation layer surface coating has fireproof coating layer, each the equipartition has the slot on the corundum mullite heat accumulation layer, and is adjacent two-layer constitute the crisscross communicating passageway of slot after the corundum mullite heat accumulation layer is combined, make the air current pass through the regenerator, the bottom of first regenerator and second regenerator is passed through the pipe connection switching-over valve, admission line and flue gas exhaust pipe are still connected to the switching-over valve. The utility model provides a crisscross intercommunication between the slot of the heat accumulator and the slot can form the passageway of the crisscross intercommunication of route in the heat accumulator, can increase and prolong the route that the air current passes through for the air current is more thorough with the heat accumulator heat transfer, and is more energy-conserving.

Description

Heat accumulating type combustion device for industrial kiln

Technical Field

The utility model belongs to the technical field of industrial furnace, concretely relates to heat accumulation formula burner for industrial furnace.

Background

The regenerative combustion is one of the technologies with great development potential for energy conservation and environmental protection in the 21 st century, and is an energy-saving and environment-friendly technology which is mainly popularized in China. In high temperature kilns, a significant portion of the heat loss is the heat loss of the flue gas. When the temperature of the flue gas is 900-1300 ℃, the residual heat of the flue gas accounts for 50-70% of the total energy consumption of the furnace. Therefore, the advanced flue gas waste heat recovery technology is actively adopted, the heat exchanger is arranged in the combustion system of the industrial kiln, and the waste heat of the flue gas is recovered for preheating combustion-supporting air, so that the energy utilization rate of the industrial furnace can be fundamentally improved, low-calorific-value fuels (such as coal gas and the like) are reasonably utilized, the pollutant emission is furthest reduced, the environmental load is reduced, and the method is an effective measure for realizing industrial energy conservation and consumption reduction.

The heat accumulator in the heat accumulation chamber of the traditional industrial kiln usually adopts a ceramic honeycomb heat accumulator or heat accumulation balls, and when the heat accumulator is formed by stacking the heat accumulation balls, gaps exist between the heat accumulation balls, so that the heat accumulator is not tight enough, the specific surface area is reduced, and the heat accumulation effect is poor; when adopting ceramic honeycomb heat accumulator, because each honeycomb hole passageway of ceramic honeycomb heat accumulator is vertical passageway usually, when industrial kiln produced a large amount of flue gases, the flue gas can pass through the honeycomb passageway fast, and the air current is passed through the resistance little, and the heat accumulator can not be accumulated to the heat, and the heat accumulation effect remains to be promoted.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to the problem that above-mentioned prior art exists, provide a heat accumulation formula burner for industrial kiln.

In order to achieve the purpose, the utility model adopts the following technical measures:

the utility model provides a regenerative combustion device for industrial kiln, includes furnace body, first regenerator and second regenerator, all install at least one regenerator in first regenerator and the second regenerator, the regenerator comprises at least two-layer corundum mullite heat accumulation layer, corundum mullite heat accumulation layer surface coating has fireproof coating layer, the equipartition has the slot on each corundum mullite heat accumulation layer, adjacent two-layer corundum mullite heat accumulation layer constitutes the crisscross communicating passageway of slot after combining, makes the air current can pass through the regenerator, the bottom of first regenerator and second regenerator is through pipe connection switching-over valve, switching-over valve still connects admission line and flue gas exhaust pipe.

Preferably, the corundum-mullite heat storage layer is vertically arranged, the corundum-mullite heat storage layer is of a wavy plate-shaped structure, and the grooves in the corundum-mullite heat storage layer are obliquely arranged.

Preferably, the grooves of the corundum-mullite heat storage layers connected with two adjacent layers are connected at an included angle which is not less than 60 degrees, and a channel with the grooves communicated in a staggered mode is formed between the two corundum-mullite heat storage layers.

Preferably, the corundum-mullite heat storage layer is 1-1.5mm thick, and each heat storage body is formed by sequentially connecting not less than 10 corundum-mullite heat storage layers.

Preferably, the heat accumulator is in a block shape, a column shape or an irregular shape, the port of each channel is respectively provided with the upper end surface and the lower end surface of the heat accumulator, and the rest side surfaces of the heat accumulator are connected with corundum-mullite sealing plates.

Preferably, a fuel supply channel is connected to the top of each of the first and second regenerators, and a valve is mounted on the fuel supply channel.

Preferably, the first regenerative chamber and the second regenerative chamber are respectively connected to two sides of the furnace body, the first regenerative chamber and the second regenerative chamber are communicated with the furnace body through a vent, and the vent is in a flaring structure.

The beneficial effects of utility model reside in that:

compared with the prior art, the heat accumulating type combustion device for the industrial kiln comprises at least two corundum-mullite heat accumulating layers, wherein the corundum-mullite heat accumulating layers have the remarkable characteristics of low re-burning linear shrinkage rate, high-temperature loaded softening temperature, corrosion resistance, high strength, large heat accumulation and release amount, good thermal shock stability, good heat conducting property, small thermal expansion coefficient and the like, the channel for ventilation is formed by communicating grooves of the two corundum-mullite heat accumulating layers, the grooves are communicated with one another in a staggered mode, the channel with the paths communicated in a staggered mode can be formed in the heat accumulating bodies, the paths through which air flows pass can be increased and prolonged, and therefore heat exchange between the air flows and the heat accumulating bodies is more thorough, and energy is saved.

Drawings

Fig. 1 is a schematic structural view of a regenerative burner for an industrial kiln according to the present invention;

FIG. 2 is a structural view of a heat accumulator of a regenerative burner for an industrial kiln according to the present invention;

FIG. 3 is an exploded view of two corundum-mullite heat-accumulating layers of the heat-accumulating type combustion device for the industrial kiln of the present invention;

fig. 4 is a schematic view of the heat accumulating type combustion device for the industrial kiln.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection, electrical connection and communication connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, a regenerative combustion device for an industrial kiln comprises a furnace body 1, a first regenerative chamber 2 and a second regenerative chamber 3, wherein the first regenerative chamber 2 and the second regenerative chamber 3 are respectively connected to two sides of the furnace body 1, the first regenerative chamber 2 and the second regenerative chamber 3 are communicated with the furnace body 1 through vent holes, the vent holes are in flaring structures, the diameters of the vent holes gradually increase towards the first regenerative chamber 2 and the second regenerative chamber 3, fuel supply channels 10 are connected to the tops of the first regenerative chamber 2 and the second regenerative chamber 3, valves 11 are installed on the fuel supply channels 10, the bottoms of the first regenerative chamber 2 and the second regenerative chamber 3 are connected with a reversing valve 6 through a pipeline 5, and the reversing valve 6 is further connected with an air inlet pipeline 7 and a flue gas discharge pipeline 8. In more detail, the reversing valve 6 is a four-port reversing valve and is made of a heat-resistant alloy material.

The first regenerator 2 and the second regenerator 3 are both provided with a regenerator 4, the regenerator 4 is matched with the first regenerator 3 and the second regenerator 3, in this embodiment, the regenerator 4 is composed of 12 corundum-mullite regenerator layers 41, grooves are uniformly distributed on the corundum-mullite regenerator layers 41, two adjacent corundum-mullite regenerator layers 41 are combined to form channels with the grooves communicated in a staggered manner, and air flow can pass through the regenerator 4. The thickness of the corundum-mullite heat storage layer 41 is 1-1.5mm, the number of the corundum-mullite heat storage layers 41 can be flexibly set according to requirements, and each heat accumulator 4 is formed by sequentially connecting not less than 2 corundum-mullite heat storage layers 41.

The surface of each corundum-mullite heat storage layer 41 is coated with a fireproof coating layer, the fireproof coating layer can be formed by coating one or more of ZS-1021 high-temperature sealing coating, ZS-811 high-temperature resistant anticorrosive coating, ZS-821 ceramic anticorrosive coating and ZS-1041 smoke anticorrosive coating, and the thickness of the fireproof coating layer is 0.3-1mm, so that the temperature resistance of the corundum-mullite heat storage layer 41 is not lower than 800 ℃, the temperature resistance can reach 1400 ℃ at most, the fireproof coating layer has good compact corrosion resistance, fire resistance and water resistance, can resist corrosion of high-temperature acid, alkali, salt liquid and corrosive gas for a long time, and can resist the temperature difference of 800 ℃.

In this embodiment, the corundum-mullite heat storage layer 41 has a wavy plate-shaped structure, each corundum-mullite heat storage layer 41 is vertically arranged, and the grooves on the corundum-mullite heat storage layer 41 are obliquely arranged. In addition, the grooves of the corundum-mullite heat storage layers 41 connected with two adjacent layers are connected at an included angle, as a preferred embodiment, the included angle in the groove direction of the corundum-mullite heat storage layers 41 connected with two adjacent layers is 90 degrees, and a channel with the grooves communicated in a staggered mode is formed between the two corundum-mullite heat storage layers 41.

The heat accumulator 4 can be in a block shape, a column shape or an irregular shape, the port of each channel is respectively provided with the upper end surface and the lower end surface of the heat accumulator 4, the rest side surfaces of the heat accumulator 4 are connected with corundum-mullite sealing plates 42, and the corundum-mullite sealing plates 42 can prevent air flow from flowing out of the heat accumulator 4 from the side surfaces, so that the heat exchange effect can be improved.

The working principle is as follows: air enters the air inlet pipeline 7 and flows to the first heat storage chamber 2 under the action of the reversing valve 6, the heat storage body 4 in the first heat storage chamber 2 stores a large amount of heat in the previous heat rotation, the air at room temperature enters the first heat storage chamber 2 and then is heated by the heat storage body 4 at high temperature, and then is mixed with fuel gas to form high-pressure airflow which enters the furnace body 1 to participate in combustion; high-temperature flue gas generated by combustion flows to the second heat storage chamber 3, the high-temperature flue gas can be in full contact with the heat storage body 4 in the second heat storage chamber 3, the heat storage body 4 in the second heat storage chamber 4 is heated, the temperature of the high-temperature flue gas is reduced, the high-temperature flue gas is discharged from the flue gas discharge pipeline 8 under the action of the induced draft fan 11, the reversing valve 6 is reversed after the high-temperature flue gas runs for a proper time, the first heat storage chamber 2 and the second heat storage chamber 3 are exchanged in action, air enters from the second heat storage chamber 3, and the flue gas is discharged from the first heat storage chamber 2; the circulation realizes the recovery of the waste heat of the flue gas.

To sum up, the regenerative combustion device for the industrial kiln adopts the heat accumulator to be composed of at least two layers of corundum-mullite heat accumulation layers, the corundum-mullite heat accumulation layers have the remarkable characteristics of low re-burning linear shrinkage rate, high-temperature refractoriness under load, corrosion resistance, high strength, large heat accumulation and release amount, good thermal shock stability, good thermal conductivity, small thermal expansion coefficient and the like, the channel for ventilation is formed by the communication of the grooves of the two layers of corundum-mullite heat accumulation layers, the grooves are communicated with the grooves in a staggered manner, the channel with the paths communicated in a staggered manner can be formed in the heat accumulator, the path through which the air flow passes can be increased and prolonged, and the heat exchange between the air flow and the heat accumulator is more thorough, and the energy is saved.

The foregoing is a more detailed description of the invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments disclosed herein. To those skilled in the art to which the utility model belongs, a plurality of simple deductions or replacements can be made without departing from the concept of the utility model, and all the deductions or replacements should be regarded as belonging to the protection scope of the utility model.

Claims

1. A regenerative combustion device for an industrial kiln comprises a furnace body (1), a first regenerative chamber (2) and a second regenerative chamber (3), at least one heat accumulator (4) is arranged in each of the first heat storage chamber (2) and the second heat storage chamber (3), the heat accumulator (4) consists of at least two corundum-mullite heat accumulation layers (41), the surface of the corundum-mullite heat storage layer (41) is coated with a fireproof coating layer, grooves are uniformly distributed on each corundum-mullite heat storage layer (41), and two adjacent corundum-mullite heat storage layers (41) are combined to form channels which are communicated with each other in a staggered mode, so that air flow can pass through the heat accumulator (4), the bottoms of the first heat storage chamber (2) and the second heat storage chamber (3) are connected with a reversing valve (6) through a pipeline (5), the reversing valve (6) is also connected with an air inlet pipeline (7) and a smoke discharge pipeline (8).

2. A regenerative burner for industrial kilns, according to claim 1, characterised in that the corundum-mullite heat accumulating layer (41) is arranged vertically, the corundum-mullite heat accumulating layer (41) is of a wavy plate-like structure and the grooves in the corundum-mullite heat accumulating layer (41) are inclined.

3. A regenerative burner for industrial kilns, according to claim 2, characterised in that the grooves of the corundum-mullite heat accumulating layer (41) connected to two adjacent layers are connected with an included angle of not less than 60 °, and channels with staggered grooves are formed between the two corundum-mullite heat accumulating layers (41).

4. A regenerative burner for industrial kilns according to claim 1 or 2, characterised in that the corundum-mullite heat storage layer (41) is 1-1.5mm thick and each of the regenerators (4) is formed by connecting not less than 10 layers of corundum-mullite heat storage layers (41) in sequence.

5. A regenerative burner for industrial kilns, according to claim 4, characterised by the fact that said regenerators (4) are in the form of blocks, columns or irregular shapes, the port of each of said channels is provided with the upper and lower end faces of said regenerator (4), respectively, the remaining side faces of said regenerator (4) being connected to corundum-mullite sealing plates (42).

6. A regenerative combustion apparatus for industrial kilns, according to claim 1, characterised in that the first regenerator (2) and the second regenerator (3) are connected at the top with a fuel supply channel (10), said fuel supply channel (10) being fitted with a valve (11).

7. A regenerative burner for industrial kilns, according to claim 1, characterised in that said first (2) and second (3) regenerators are connected to the furnace body (1) on either side, respectively, said first (2) and second (3) regenerators being connected to the furnace body (1) through vents, said vents being of flared configuration.