CN110848675A

CN110848675A - Novel heat accumulating type combustor with sealing structure

Info

Publication number: CN110848675A
Application number: CN201911195700.XA
Authority: CN
Inventors: 朱冲; 王劲松; 李志银
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-02-28

Abstract

The utility model provides a novel seal structure heat accumulation formula combustor, it by combustor 1, regenerator 2, mixing chamber 3, twice sealed recess 4, boss 5 all around, dog 6, anchor nail 7, seal structure 8, the boss 9 at top, combustor spout brick 10, recess 11 on the spout brick, heat accumulator 12, combustor spout brick orifice 13, steel sheet shell 14, 15 constitutions of combustor inside lining refractory material, its characterized in that: the combustor 1 and the regenerator 2 are matched with a combustor nozzle brick 10 and are arranged together, and the shell is a steel plate shell 14, so that the combustor 1 is simple and compact in structure and convenient to install; the possibility of air leakage from the inside of the regenerative chamber 2 to the outside does not exist, and the heating efficiency of the furnace is improved; the hidden danger of fire cross of the burner gas from the gap of the burner 1 is solved, the service life is obviously prolonged, and the optimal continuous production stability is ensured.

Description

Novel heat accumulating type combustor with sealing structure

Technical Field

The invention relates to the field of clean combustion of fuels, and particularly provides a novel heat accumulating type combustor with a sealing structure.

Background

An industrial furnace is an important industrial production thermal equipment, and one of the core technologies is a burner for fuel combustion. Industrial kilns are widely used in the heating and heat treatment processes in the metallurgical, mechanical, nonferrous, building material and other industrial fields, traditional industrial kilns employ conventional burners, use air and gas preheating techniques, with lower air and gas preheating temperatures and relatively lower furnace thermal efficiencies.

With the increasing requirements of energy conservation and environmental protection, the existing regenerative combustion technology, namely regenerative burners, is widely applied. The heat efficiency of the industrial furnace is greatly improved. Because the heat accumulation burner is arranged in the furnace wall, the problems also occur in the use process of the heat accumulation burner, such as air leakage of a heat accumulation chamber of the heat accumulation burner, fire cross of a gap at the joint part of the burner and the furnace wall, burning loss and deformation of a steel plate of an outer wall of the furnace, damage and breakage of a furnace masonry, serious influence on normal production, and great potential safety hazard. Therefore, a new regenerative burner sealing structure is particularly important to solve the above problems.

The gas leakage of the regenerative chamber of the regenerative burner and the fire crossing at the joint part of the furnace wall are mainly related to the structure of the burner and the installation structure of the burner and the furnace wall. Through reasonable design combustor seal structure, can reduce on the basis of burning safe and reliable, efficient that the combustor is inside reveals and outside phenomenon of mixing fire produces, make the combustor operating mode improve, improve the rate of utilization of industrial furnace kiln, reduce the field maintenance work load. At present, some combustor designs improve and enhance the sealing structure, but a solution scheme for comprehensively perfecting the internal and external structures of the integral combustor is lacked, so that the space for improving the internal and external structures of the integral combustor is greatly increased.

The existing heat accumulating type burner for the industrial furnace generally comprises a burner heat accumulating chamber and a burner brick: the combustor brick and the regenerator are connected together in the furnace wall of the furnace, the combustor and the combustor brick are arranged in pairs on the furnace walls on two sides, the combustor regenerator is a gas channel, the middle of the combustor regenerator is filled with a regenerator, the regenerator is connected with the combustor brick arranged on the inner side of the furnace wall and cast with the furnace body into a whole, and the regenerator channel is communicated with spray holes on the combustor brick. The industrial furnace heat accumulation burner of this kind of structure arranges the stove wall in, because regenerator and combustor brick are two parts, the connection position has the joint seam, and this connection position uses the back through a period in the stove wall, and the gap grow causes gas leakage, and this gap constantly strengthens under high temperature state afterwards, finally causes the combustor gas leakage all around to fire, and the stove wall damages, and the combustor can not normal use. The temperature in the heating furnace is uneven, the heating quality is affected, the operation is not flexible, and the regenerator is easily damaged when being arranged in the furnace wall, so that gas leakage is caused, and the working environment pollution is caused.

Disclosure of Invention

The invention aims to provide a heat accumulation sealed burner. The burner regenerator and the burner bricks are designed into a whole, and the ceramic honeycomb body is arranged in the burner regenerator on the furnace wall, so that each burner is completely independent, and the integrated burner in the true sense is realized. The industrial furnace heat accumulation burner adopting the structure has the advantages that air leakage cannot occur between the heat accumulation chamber inside the burner and the burner bricks, the service life of the burner is consistent with that of a furnace wall, and meanwhile, the periphery of the outer nozzle of the burner and the furnace wall are sealed through the labyrinth seal structures at the front nozzle of the burner and the outer shell of the middle burner.

The innovation points of the invention are as follows: it comprises combustor 1, regenerator 2, mixing chamber 3, twice sealed recess 4, boss 5, dog 6, anchor nail 7, seal structure 8, the boss 9 at top, combustor spout brick 10, recess 11 on the spout brick, heat accumulator 12, combustor spout brick orifice 13, steel sheet shell 14, combustor inside lining refractory material 15 all around, its characterized in that: the combustor comprises a combustor 1, a regenerator 2 and matched combustor nozzle bricks 10 which are arranged together, wherein the shell of the combustor is a steel plate, the regenerator 2 is composed of a steel plate shell 14, a heat accumulator 12 and a combustor lining refractory material 15, the heat accumulator 12 is filled in the regenerator 2 and is formed into the regenerator 2, a mixing chamber 3 is arranged between the regenerator 2 and the combustor nozzle bricks 10 at the front part, a boss 5 is arranged at the periphery of the mixing chamber 3, and the mixing chamber 3 is favorable for airflow to uniformly flow through the regenerator 2 so as to improve the heat exchange efficiency; the integrated structure ensures that no gap exists between the inner furnace wall and the outer furnace wall of the regenerator, solves the problem of air leakage in the regenerator caused by the gap between the split burner and the burner brick, is characterized in that two sealing grooves 4 are designed outside the burner, an anchoring nail 7 and a burner end labyrinth sealing structure 8 are welded on a steel plate shell 13, when the burner body is arranged in the furnace wall for installation, the grooves 4, the sealing structure 8 and the anchoring nail 7 ensure that the burner and the furnace wall are combined more tightly when the furnace wall is poured, no through linear gap exists at the combined part, and the furnace gas can not leak from the periphery of the burner to cause fire crossing. The burner solves the problem of air leakage at the joint of the outer part of the burner and the furnace wall, the mixing chamber 3 is provided with a boss 9 at the top to play a role in blocking short circuit of airflow, the upper part and the lower part of the end part of the burner are provided with convex stop blocks 6 which are matched with grooves 11 on the nozzle brick, and the nozzle brick cannot topple into the furnace due to external force caused by airflow or structural deformation in the using process.

The working principle of the invention is that the integrated design of the combustor regenerator and the combustor brick is started from the two aspects of the inside and the outside of the combustor, namely the integrated design does not have a gap between the two parts of the original regenerator and the combustor brick, and the problems of gas leakage and fire ignition of the combustor and outward gas leakage in the regenerator are solved. Simultaneously at outside design recess and tip labyrinth structure all around of combustor to and outside welding anchor nail etc. strengthen the combination of furnace wall castables and combustor, the straight line gap that the joint department does not link up, and the combustor is more firm with the combination of furnace wall, prevents that the combustor from appearing because deformation and the inflation that high temperature caused in the use, arouses the gap to enlarge, has solved the outside phenomenon of efflorescence gas leakage all around of combustor. The service life of the combustor is greatly prolonged, and the production line operating rate is also improved. The field maintenance workload is reduced, and the field production environment is greatly improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

The invention has the advantages that:

the burner has the advantages of simple and compact structure, convenient installation, wide application range and the like, and the furnace structure, the foundation, the steel structure and the like of the newly-built and improved heating furnace are the same as the existing design. The heat storage chamber and the burner bricks are of an integral structure and are arranged in the wall body of the industrial furnace, no gap exists between the inside of the heat storage chamber and the furnace wall, and the possibility of outward air leakage in the heat storage chamber is avoided. The air flow in the regenerator is uniformly distributed, the utilization rate of the honeycomb body is high, the preheating temperature of air or coal gas is high, and the heating efficiency of the furnace is improved. Meanwhile, the labyrinth seal structure is designed outside the burner, so that the hidden danger of fire spread of furnace gas from gaps between the periphery of the burner and a furnace wall is solved, the accurate control of the furnace temperature and the furnace pressure is facilitated, and the control performance of the furnace and the heating quality of steel billets are improved. The service life of the combustor is obviously prolonged, the maintenance of equipment is convenient, the on-line maintenance and the replacement of the ceramic honeycomb body can be realized, the optimal continuous production stability is ensured, and the operation rate is obviously improved.

Drawings

FIG. 1 is a schematic view of a heat-accumulating sealed burner according to the present invention

FIG. 2 is a schematic sectional view of a heat-accumulating sealed burner according to the present invention

FIG. 3 is a schematic view of a nozzle brick of the heat-accumulating sealed burner of the present invention

In the figure: 1-combustor, 2-regenerator, 3-mixing chamber, 4-two sealing grooves, 5-peripheral boss, 6-baffle, 7-anchoring nail, 8-sealing structure, 9-top boss, 10-combustor spout brick, 11-groove on the spout brick, 12-regenerator, 13-combustor spout brick spray hole, 14-steel plate shell and 15-combustor liner refractory material.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the examples and the accompanying drawings. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", and the like, which refer to an orientation and a state relationship based on the orientation and the state relationship shown in the drawings, are used only for convenience of description and simplification of description, and do not indicate or imply that a device or an element referred to must have a specific orientation, operate in a specific orientation and configuration, and thus, are not to be construed as limiting the present invention.

Referring to fig. 1 and 2, the novel integrated regenerative burner structure provided by the invention comprises an integrated burner 1 and a regenerative chamber 2, wherein a burner nozzle brick 10 matched with the burner is arranged at the front part of the burner and forms a complete burner together with a burner body. The heat accumulator is arranged in the heat accumulator 2, a mixing chamber 3 is arranged between the heat accumulator 2 and the front burner nozzle brick 10, a boss 5 is arranged on the periphery of the mixing chamber 3, and the mixing chamber 3 is favorable for airflow to uniformly flow through the heat accumulator, so that the heat exchange efficiency is improved. The integrated structure enables no gap to exist between the inner furnace wall and the outer furnace wall of the regenerator, and solves the problem that the gap between the split type burner and the burner brick causes air leakage inside the regenerator.

As shown in figures 1 and 2, the burner is provided with two sealing grooves 4 outside, the steel plate shell is welded with an anchoring nail 7 and a burner end labyrinth sealing structure 8, when the burner body is arranged in a furnace wall for installation, when the furnace wall is poured, the grooves 4, the sealing structure 8 and the anchoring nail 7 ensure that the burner and the furnace wall castable are combined more tightly, no through linear gap exists at the combined part, and the burner gas can not leak from the periphery of the burner to cause fire crossing. The problem of gas leakage at the joint of the outer part of the burner and the furnace wall is solved.

Meanwhile, in order to prevent the heat accumulator from being installed in the heat accumulator, a gap is easily formed between the inner wall of the top of the heat accumulator 2 and the heat accumulator to form an internal short circuit of air flow, and the mixing chamber 3 is provided with a boss 9 at the top to block the short circuit of air flow.

As shown in figures 1, 2 and 3, the upper and lower ends of the end part of the burner are provided with the raised stop blocks 6 which are matched with the grooves 11 on the spout brick, so that the spout brick cannot topple into the furnace due to external force caused by airflow or structural deformation in the using process of the spout brick.

Claims

1. The utility model provides a novel seal structure heat accumulation formula combustor, it by combustor 1, regenerator 2, mixing chamber 3, twice sealed recess 4, boss 5, dog 6, anchor nail 7, seal structure 8, the boss 9 at top, combustor spout brick 10, spout brick on recess 11, heat accumulator 12, combustor spout brick orifice 13, steel sheet shell 14, 15 constitutions of combustor inside lining refractory material, its characterized in that: the combustor 1 and the regenerator 2 are installed together with a matched combustor nozzle brick 10, the outer shell of the combustor is a steel plate outer shell 14, the regenerator 2 is composed of a steel plate outer shell 14, a heat accumulator 12 and a combustor lining refractory material 15, the heat accumulator 12 is installed in the regenerator 2 in a filling mode to form the regenerator 2, a mixing chamber 3 is arranged between the regenerator 2 and the front combustor nozzle brick 10, a boss 5 is arranged on the periphery of the mixing chamber 3, airflow can uniformly flow through the regenerator 2, two sealing grooves 4 are designed outside the combustor, an anchoring nail 7 and a combustor end part labyrinth sealing structure 8 are welded on the steel plate outer shell 13, when the combustor body is arranged in a furnace wall installation, when the furnace wall is poured, the grooves 4, the sealing structures 8 and the anchoring nail 7 ensure that the combustor and the furnace wall are combined more tightly, the mixing chamber 3 is provided with a boss 9 at the top to achieve the effect of blocking short circuit of the airflow, a convex stop block 6 is designed at the upper end part and the lower part of the, with the recess 11 cooperation on the spout brick, the spout brick can not cause the spout brick to empty to the stove because of air current or structural deformation external force in the use.