Combustion hearth

Abstract

The invention provides a combustion hearth which is characterized in that the combustion hearth comprises an inner furnace barrel, an outer furnace barrel, a fire grate, an air inlet assembly and an ash removal assembly, the inner furnace barrel is arranged in the outer furnace barrel, and a first gap is reserved between the inner wall of the inner furnace barrel and the inner wall of the outer furnace barrel. The fire grate is connected to the bottom of the inner furnace barrel and divides the outer furnace barrel into a main combustion chamber and an ash storage chamber. The air inlet assembly is arranged at the bottom of the outer furnace barrel and communicates with the lower portion of the inner furnace barrel, the air inlet assembly comprises an air inlet end and an air outlet end which are oppositely arranged in the extending direction of the air inlet assembly, and the air outlet direction of the air outlet end faces the fire grate. In the embodiment of the invention, the combustion hearth is provided with the inner furnace barrel and the outer furnace barrel, the fuel is combusted in the inner furnace barrel, and the combusted particles are blown out by the air inlet assembly and fall into the ash storage chamber below from the first gap between the inner furnace barrel and the outer furnace barrel, so that the content of dust entering a subsequent heat exchange device can be reduced to a greater extent; and the accumulation of combusted inorganic matters on the fire grate is less, and the probability of coking of the fire grate is lower.

Description

Technical Field

[0001] The present application relates to the technical field of furnaces, and in particular to a combustion furnace. Background Art

[0002] The combustion furnace is a key part of the combustion equipment and is the space where the fuel undergoes combustion reactions. In common technologies, a lot of dust will be generated after the fuel in the combustion furnace is burned out. The dust will enter the subsequent heat exchange device and have an adverse effect. In addition, inorganic matter after combustion will accumulate on the grate, causing the grate to coke and affecting the combustion effect. Summary of the invention

[0003] The main purpose of the present invention is to provide a combustion furnace to solve the problems in the prior art that the combustion furnace generates a lot of dust and the grate is easy to coke.

[0004] To achieve the above object, the present invention provides a combustion furnace, including an inner furnace tube, an outer furnace tube, a grate, an air inlet assembly and a ash cleaning assembly, wherein:

[0005] The inner furnace barrel is arranged inside the outer furnace barrel, and a first gap is left between the inner wall of the inner furnace barrel and the inner wall of the outer furnace barrel;

[0006] The grate is connected to the bottom of the inner furnace, and the grate divides the outer furnace into the main combustion chamber and the ash storage chamber;

[0007] The air inlet assembly is arranged at the bottom of the outer furnace drum and communicated with the lower part of the inner furnace drum. The air inlet assembly includes an air inlet end and an air outlet end which are arranged relatively along the extension direction thereof, and the air outlet direction of the air outlet end is toward the grate.

[0008] The ash cleaning component is arranged on a side of the outer furnace drum opposite to the air inlet component, and the ash cleaning component is communicated with the ash storage chamber;

[0009] The particles from the main combustion chamber fall into the ash storage chamber through the first gap.

[0010] In one embodiment, a feed channel is further included. The feed channel is arranged on the wall of the outer furnace drum and located at the upper part of the air inlet assembly. The feed channel is arranged obliquely downward and is connected to the inner furnace drum.

[0011] In one embodiment, the first gap between the inner wall of the inner furnace tube and the inner wall of the outer furnace tube is an annular gap for the combustion ash to pass through.

[0012] In one embodiment, it further includes a bracket, wherein the number of the brackets is multiple, all of which are located at the same horizontal height and are arranged at intervals on the inner wall of the outer furnace drum, and the inner furnace drum is installed above the brackets.

[0013] In one embodiment, the inner furnace drum includes a furnace body and a base, and the grate is arranged between the furnace body and the base.

[0014] In one embodiment, the grate and the inner furnace drum are connected by overlapping.

[0015] In one embodiment, the outer furnace drum is further provided with a furnace door, and the furnace door is flush with the height of the inner furnace drum.

[0016] In one embodiment, the furnace door and the ash cleaning assembly are arranged vertically up and down and are located on the same side of the outer furnace tube.

[0017] In one embodiment, the air inlet end is a circular pipe, the air outlet end is connected to the air inlet end, and extends to the bottom of the inner furnace tube.

[0018] In one embodiment, the size of the end of the air outlet close to the inner furnace drum corresponds to the size of the inner furnace drum.

[0019] In the embodiment of the present application, the combustion furnace has an inner furnace barrel and an outer furnace barrel. The fuel burns in the inner furnace barrel, and the particles after burnt are blown out by the air inlet assembly. The particles fall into the ash storage chamber below from the first gap between the inner furnace barrel and the outer furnace barrel. This can greatly reduce the dust content entering the subsequent heat exchange device, less inorganic matter accumulates on the grate after combustion, and the probability of coking on the grate is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a combustion furnace in one embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the inner furnace drum in one embodiment of the present invention.

[0023] Description of the drawings: 1. Outer furnace barrel; 11. Main combustion chamber; 12. Ash storage chamber; 2. Inner furnace barrel; 21. Furnace body; 22. Base; 3. Grate; 4. Air inlet assembly; 41. Air inlet end; 42. Air outlet end; 5. Ash cleaning assembly; 6. First gap; 7. Feed channel; 8. Bracket; 9. Furnace door. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any methods, equipment and materials of the prior art similar or equivalent to the methods, equipment and materials described in the embodiments of the present invention can also be used to implement the present invention.

[0027] The main purpose of the present invention is to provide a combustion furnace to solve the problems in the prior art that the combustion furnace generates a lot of dust and the grate is easy to coke.

[0028] To achieve the above-mentioned purpose, the present invention provides a combustion furnace, comprising an inner furnace drum 2, an outer furnace drum 1, a grate 3, an air inlet assembly 4 and a ash cleaning assembly 5, wherein:

[0029] The inner furnace tube 2 is arranged inside the outer furnace tube 1, and a first gap 6 is left between the inner wall of the inner furnace tube 2 and the inner wall of the outer furnace tube 1;

[0030] The grate 3 is connected to the bottom of the inner furnace 2, and the grate 3 divides the outer furnace 1 into a main combustion chamber 11 and an ash storage chamber 12;

[0031] The air inlet assembly 4 is arranged at the bottom of the outer furnace drum 1 and communicated with the lower part of the inner furnace drum 2. The air inlet assembly 4 includes an air inlet end 41 and an air outlet end 42 which are arranged opposite to each other along its own extension direction. The air outlet end 42 is directed toward the grate 3.

[0032] The ash cleaning component 5 is arranged on the side of the outer furnace drum 1 opposite to the air inlet component 4, and the ash cleaning component 5 is communicated with the ash storage chamber 12;

[0033] The particles from the main combustion chamber 11 fall into the ash storage chamber 12 through the first gap 6 .

[0034] It should be noted that the height of the outer furnace drum 1 is higher than that of the inner furnace drum 2 . After the particulate matter is blown out of the inner furnace drum 2 , it is difficult for it to continue to fly above the outer furnace drum 1 . Most of it falls into the ash storage chamber 12 from the first gap 6 between the inner furnace drum 2 and the outer furnace drum 1 .

[0035] In the embodiment of the present application, the combustion furnace has an inner furnace tube 2 and an outer furnace tube 1. The fuel burns in the inner furnace tube 2. The burnt particles are blown out by the air inlet assembly 4. The particles fall into the ash storage chamber 12 below from the first gap 6 between the inner furnace tube 2 and the outer furnace tube 1. This can greatly reduce the dust content entering the subsequent heat exchange device, less inorganic matter accumulates on the grate 3 after combustion, and the probability of coking of the grate 3 is low.

[0036] In one embodiment, a feed channel 7 is further included. The feed channel 7 is arranged on the wall of the outer furnace drum 1 and located on the upper part of the air inlet assembly 4. The feed channel 7 is arranged to be inclined downward and connected to the inner furnace drum 2.

[0037] In the embodiment of the present application, the feed channel 7 is arranged on the wall of the outer furnace tube 1, inclined downward, and connected to the inner furnace tube 2. In this way, fuel can be added into the inner furnace tube 2 from the feed channel 7 at any time, which is relatively simple and convenient. The fuel can fall directly into the inner furnace tube 2 through the inclined feed channel 7. The feeding is normal, which can reduce the accumulation of materials in the feed channel 7, and help maintain the stable progress of the reaction in the furnace.

[0038] In one embodiment, the first gap 6 between the inner wall of the inner furnace tube 2 and the inner wall of the outer furnace tube 1 is an annular gap for the combustion ash to pass through.

[0039] In the embodiment of the present application, the first gap 6 is an annular gap. After the dust is blown out from the inner furnace tube 2, it can directly flow into the ash storage chamber 12 below from any section of the annular gap, which can reduce dust accumulation, stabilize the combustion process, and reduce problems such as uneven temperature distribution in the furnace and reduced combustion efficiency caused by dust accumulation.

[0040] In one embodiment, it further includes a bracket 8 , wherein the number of the brackets 8 is plural, all of which are located at the same level and are arranged at intervals on the inner wall of the outer furnace tube 1 , and the inner furnace tube 2 is installed above the brackets 8 .

[0041] It should be noted that the brackets 8 are arranged at a uniform horizontal height of the inner wall of the outer furnace tube 1 , and the intervals between the multiple brackets 8 are the same.

[0042] In the embodiment of the present application, a plurality of brackets 8 are arranged on the inner wall of the outer furnace tube 1 at intervals and at the same horizontal height, so that the inner furnace tube 2 can be installed in the outer furnace tube 1 more stably and the installation and disassembly of the inner furnace tube 2 is convenient.

[0043] In one embodiment, the inner furnace tube 2 includes a furnace body 21 and a base 22 , and the grate 3 is disposed between the furnace body 21 and the base 22 .

[0044] It should be noted that the base 22 is a plurality of steel plates stacked together and fixed to each other by bolts. The grate 3 is placed on the base 22 , and the furnace body 21 is arranged above the grate 3 .

[0045] In the embodiment of the present application, the grate 3 is arranged between the furnace body 21 and the base 22. The base 22 can provide a relatively stable support for the grate 3, so that the displacement or deformation of the grate 3 during the process of bearing the weight of the fuel and burning is reduced.

[0046] In one embodiment, the grate 3 and the inner furnace drum 2 are connected in an overlapping manner.

[0047] It should be noted that the grate 3 is overlapped on the base 22 of the inner furnace tube 2 , and the furnace body 21 is installed above the grate 3 .

[0048] In the embodiment of the present application, the connection method between the grate 3 and the inner furnace drum 2 is overlapped, which is convenient for installation and disassembly of the grate 3, simple and convenient for maintenance, and low in cost.

[0049] In one embodiment, the outer furnace drum 1 is further provided with a furnace door 9 , and the furnace door 9 is flush with the height of the inner furnace drum 2 .

[0050] In the embodiment of the present application, the furnace door 9 is flush with the height of the inner furnace drum 2. The operator can more conveniently observe the combustion conditions of the inner furnace drum 2 through the position of the furnace door 9. The operation of adding or removing materials from the inner furnace drum 2 is more convenient and simple. The inspection and maintenance of the inner furnace drum 2 can also be carried out directly by opening the furnace door 9, which reduces the difficulty and cost of maintenance.

[0051] In one embodiment, the furnace door 9 and the ash cleaning assembly 5 are arranged vertically up and down and are located on the same side of the outer furnace tube 1 .

[0052] In the embodiment of the present application, the furnace door 9 and the ash cleaning assembly 5 are located on the same side of the outer furnace barrel 1, which effectively saves space on the side of the furnace body 21. When performing maintenance work on the furnace, maintenance personnel can concentrate on working on one side of the furnace body 21, thereby improving the efficiency of maintaining and cleaning the furnace.

[0053] In one embodiment, the air inlet end 41 is a circular pipe, and the air outlet end 42 is connected to the air inlet end 41 and extends to the bottom of the inner furnace tube 2 .

[0054] In the embodiment of the present application, the air inlet end 41 is a circular pipe, the air outlet end 42 is connected to the air inlet end 41, and extends to the bottom of the inner furnace tube 2, which can promote the full combustion of the fuel in the inner furnace tube 2 and improve the thermal energy utilization efficiency.

[0055] In one embodiment, the size of one end of the air outlet end 42 close to the inner furnace tube 2 corresponds to the size of the inner furnace tube 2 .

[0056] It should be noted that the air outlet end 42 is a conical pipe with a gradually increasing diameter, wherein the end with a larger diameter corresponds to the bottom of the inner furnace tube 2 .

[0057] In the embodiment of the present application, the size of the end of the air outlet end 42 close to the inner furnace drum 2 corresponds to the size of the inner furnace drum 2, so that the wind in the air outlet end 42 can be blown out from the inner furnace drum 2, thereby blowing the dust on the grate 3 out of the inner furnace drum 2 and falling into the ash storage chamber 12, so that the grate 3 can be cleaned more conveniently and the coking of the grate 3 can be reduced.

[0058] The above technical solutions of the present invention are only preferred embodiments of the present invention, and the patent scope of the present invention is not limited thereto. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A combustion furnace, characterized in that: It includes an inner furnace drum, an outer furnace drum, a grate, an air inlet assembly and a ash cleaning assembly, wherein: The inner furnace barrel is arranged inside the outer furnace barrel, and a first gap is left between the inner wall of the inner furnace barrel and the inner wall of the outer furnace barrel; The grate is connected to the bottom of the inner furnace, and the grate divides the outer furnace into a main combustion chamber and an ash storage chamber; The air inlet assembly is arranged at the bottom of the outer furnace drum and communicated with the lower part of the inner furnace drum. The air inlet assembly comprises an air inlet end and an air outlet end which are arranged opposite to each other along its own extension direction. The air outlet end is directed toward the grate. The ash cleaning component is arranged on a side of the outer furnace drum opposite to the air inlet component, and the ash cleaning component is in communication with the ash storage chamber; The particles from the main combustion chamber fall into the ash storage chamber through the first gap.

2. The combustion furnace according to claim 1, characterized in that: It also includes a feed channel, which is arranged on the wall of the outer furnace drum and located at the upper part of the air inlet assembly. The feed channel is arranged obliquely downward and is connected to the inner furnace drum.

3. The combustion furnace according to claim 1, characterized in that: The first gap between the inner wall of the inner furnace tube and the inner wall of the outer furnace tube is an annular gap for the combustion ash to pass through.

4. The combustion furnace according to claim 3, characterized in that: It also includes a plurality of brackets, which are all located at the same level and are arranged at intervals on the inner wall of the outer furnace tube, and the inner furnace tube is installed above the brackets.

5. The combustion furnace according to claim 1, characterized in that: The inner furnace drum comprises a furnace body and a base, and the grate is arranged between the furnace body and the base.

6. The combustion furnace according to claim 5, characterized in that: The grate and the inner furnace tube are connected in an overlapping manner.

7. The combustion furnace according to claim 1, characterized in that: The outer furnace drum is also provided with a furnace door, and the furnace door is flush with the height of the inner furnace drum.

8. The combustion furnace according to claim 7, characterized in that: The furnace door and the ash cleaning assembly are arranged vertically up and down and are located on the same side of the outer furnace tube.

9. The combustion furnace according to claim 1, characterized in that: The air inlet end is a circular pipe, and the air outlet end is connected to the air inlet end and extends to the bottom of the inner furnace tube.

10. The combustion furnace according to claim 9, characterized in that: The size of one end of the air outlet end close to the inner furnace drum corresponds to the size of the inner furnace drum.

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