CN210314027U

CN210314027U - Hot air beam for lime kiln and lime kiln

Info

Publication number: CN210314027U
Application number: CN201921356923.5U
Authority: CN
Inventors: 王长春
Original assignee: Beijing Apocalypse Jinqiao Engineering Technology Co Ltd
Current assignee: Beijing Apocalypse Jinqiao Engineering Technology Co Ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-04-14
Anticipated expiration: 2029-08-20

Abstract

The embodiment of the utility model provides a lime kiln is with hot-blast roof beam and lime kiln, including first hot-blast entry (1) and box girder (2) that have one end open-ended, box girder (2) are located the lime kiln, the opening of box girder (2) is towards the lime kiln bottom and keeps the distance with the lime kiln bottom; the box girder (2) comprises a first side girder (21), a second side girder (22), a first end girder (23), a second end girder (24) and a cross girder (25); the first hot air inlet (1) penetrates through the first end beam (23). The hot air is conveyed into the box girder through the first hot air inlet, the hot air of the box girder flows into the lime kiln from the first side beam and the second side beam of the box girder, a thermal field with uniform temperature is formed in the lime kiln, and the density of the hot air is the same, so that all limestone particles are uniformly contacted with the hot air and are calcined, namely the calcining degrees of all the limestone particles are basically the same, the lime content is improved, and the activity and the quality of a lime finished product are improved.

Description

Hot air beam for lime kiln and lime kiln

Technical Field

The utility model relates to a lime field of calcining, concretely relates to lime kiln is with hot-blast beam and lime kiln.

Background

The calcination of limestone in beam limekilns is a conventional technique for lime production, and there are many sets of beam limekilns of different specifications in operation. One of the core equipment of beam type lime kiln is the burning roof beam, and this kind of burning roof beam has frame construction, adopts heat conduction oil cooling, and the roof beam body has nozzle, fuel pipeline and combustion air pipeline, and fuel pipeline and combustion air pipeline carry through preheated fuel and combustion air to the nozzle, and nozzle evenly distributed fuel and burning.

In implementing the present invention, the applicant has found that there are at least the following problems in the prior art:

in the existing lime kiln using the combustion beam, because the combustion beam performs mixed combustion on coal gas (gas fuel) and combustion air at the position of a burner during use, flame is directly combusted on limestone, so that a thermal field with uniform temperature is difficult to form in an area near the combustion beam, and when the flame temperature is too high, "overburning" (which means that the activity of a lime finished product is reduced, the CaO content is reduced, and the quality of lime is reduced because the calcining temperature is too high) is caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a lime kiln is with hot-blast roof beam, carry hot-blastly in to the case roof beam through first hot-blast entry, the hot-blast main first curb girder and the second curb girder department lime kiln of case roof beam flow in, the even unanimous thermal field of temperature has been formed in the lime kiln, and hot-blast density is the same, make all limestone particles can even hot-blast contact and calcine, it is the same basically also to the degree of calcining of all limestone particles, improve lime CaO's content, the off-the-shelf activity degree of lime has been improved, the lime quality improves thereupon in addition.

In order to achieve the above object, in one aspect, an embodiment of the present invention provides a hot blast beam for a lime kiln, including: the first hot air inlet is arranged on the box girder, the box girder is arranged in the lime kiln, the opening of the box girder faces the bottom of the lime kiln, and the distance between the opening and the bottom of the lime kiln is greater than zero;

the box girder includes: the first side beam, the second side beam, the first end beam, the second end beam and the cross beam;

the first side beam, the second side beam, the first end beam and the second end beam enclose a quadrangle with a closed circumference, and the first side beam and the second side beam are arranged oppositely; the first end beam and the second end beam are arranged oppositely; the cross beam covers the tops of the first side beam, the second side beam, the first end beam and the second end beam;

the first hot air inlet penetrates through the first end beam.

Preferably, the box girder further comprises a partition beam which is arranged in the box girder and has the same direction and the same height as the first end beam, wherein the partition beam is arranged in the length direction of the first side beam and is respectively connected with the first side beam, the second side beam and the cross beam;

the hot air beam for the lime kiln further comprises a second hot air inlet, and the second hot air inlet penetrates through the second end beam.

Preferably, the cooling device further comprises a first cooling channel, the first cooling channel is arranged on the inner wall of the first side beam, the first cooling channel is U-shaped, two vertical edges of the U-shape have the same length direction with the first side beam, the first cooling channel comprises a first cooling medium inlet and a first cooling medium outlet, the first cooling medium inlet is arranged on the U-shaped vertical edge close to the opening side of the box girder, and the first cooling medium outlet is arranged on the U-shaped vertical edge far away from the opening side of the box girder; and/or the cooling device further comprises a second cooling channel, the second cooling channel is arranged on the inner wall of the second side beam, the second cooling channel is U-shaped, two vertical edges of the U-shaped are identical to the second side beam in length direction, the second cooling channel comprises a second cooling medium inlet and a second cooling medium outlet, the second cooling medium inlet is arranged on the U-shaped vertical edge close to the opening side of the box beam, and the second cooling medium outlet is arranged on the U-shaped vertical edge far away from the opening side of the box beam.

Preferably, the cooling device further comprises a third cooling channel, and the third cooling channel is arranged on the inner wall of the cross beam.

Preferably, the fire-resistant structure further comprises an inner fire-resistant wall arranged on the inner walls of the first side beam, the second side beam, the first end beam, the second end beam and the cross beam, and/or an outer fire-resistant wall arranged on the outer sides of the first side beam, the second side beam, the first end beam, the second end beam and the cross beam.

Preferably, the included angle formed by the first side beam and the cross beam is 89-85 degrees; and/or the included angle formed by the second side beam and the cross beam is 89-85 degrees.

Preferably, the limestone support device further comprises a bearing beam used for connecting the limestone support device, and the bearing beam is arranged on the cross beam.

Preferably, the cross-section of the beam is rectangular.

Preferably, the limestone outlet direction of the limestone bearing device points to the bottom of the lime kiln, and the quick lime generated by calcination and falling on the bottom of the lime kiln below the opening of the hot blast beam, the first side beam and the second side beam form a V-shaped hot blast channel.

On the other hand, the embodiment of the utility model provides a still provide a lime kiln, include according to any one of claim to the hot-blast beam for lime kiln, the middle part in the lime kiln is located to the hot-blast beam for lime kiln, the opening of case roof beam is towards the lime kiln bottom, just the distance of opening and lime kiln bottom is greater than zero.

The technical scheme has the following beneficial effects: the utility model discloses an embodiment of hot-blast roof beam for lime kiln, locate lime kiln on the bottom at the high temperature center part in the lime kiln with hot-blast roof beam, also exactly calcine the section, and keep certain distance with the bottom for the lime kiln provides hot-blast, the calcination of lime stone is accomplished in hot-blast and lime stone contact, generates lime. The temperature of the hot air is 600-1250 ℃, such as 1000-1250 ℃. Assuming that the calcination temperature is 1000 ℃, the hot air temperature is 1000 ℃, and the hot air, i.e. the high-temperature gas medium, can be hot air, hot flue gas or hot CO₂Other gaseous media are also possible.

The lime kiln is with hot-blast roof beam includes first hot-blast entry and has one end open-ended box girder, the box girder is located in the lime kiln, the opening of box girder is towards the lime kiln bottom and keeps away from with the lime kiln bottom, first hot-blast entry is located on the box girder, and in hot-blast entering box girder of certain wind pressure from first hot-blast entry, atmospheric pressure in the box girder grows high gradually, and the meaning flows from the opening of box girder lower extreme, and the hot-blast meeting of outflow rises from the opening outside upwards in the lime kiln, then with the lime stone contact that falls from the high altitude, generates lime.

The box girder comprises a first side girder, a second side girder, a first end girder, a second end girder and a cross girder; the first side beam, the second side beam, the first end beam and the second end beam enclose a quadrangle enclosed in the circumferential direction, the box beam is of a beam structure and is of a long and thin structure, the cross section of the box beam can be of a rectangular, square or arch structure, specifically, the first side beam and the second side beam are in the length direction of the box beam, and the length dimension of the first side beam and the length dimension of the second side beam are far larger than the distance between the first side beam and the second side beam, namely the width dimension of the first side beam and the width dimension of the second side beam are far larger than the. The specific installation mode is as follows: the first side beam and the second side beam are oppositely arranged; the first end beam and the second end beam are arranged oppositely; the cross member covers the top of the first side member, the second side member, the first end member and the second end member, and the opening of the one end of the box girder is formed without any beam body provided on the opposite surface of the cross member.

The first hot air inlet penetrates through the first end beam and is connected with a pipeline for conveying hot air, so that the hot air is rapidly mixed with air of the box girder along the length direction of the box girder, the farthest distance for the hot air to flow in the box girder is the inner wall of the second end beam, impact of the hot air and the inner wall of the box girder is reduced, and energy loss is reduced. Then hot air of the box girder mainly flows into the lime kiln from the first side beam and the second side beam of the box girder, and is supplied into the lime kiln from two sides of the girder body of the box girder, so that a hot air channel in the box girder is formed, namely, the hot air is supplied to the middle part of the lime kiln from two sides of the box girder.

The wind pressure of the hot wind conveyed into the box girder is uniform and equal, so the wind pressure in the conveying pipeline is also uniform and equal, the wind pressure entering the box girder is also uniform and equal, and the density of the hot wind outside the box girder of the lime kiln is the same.

According to the working principle of the lime kiln, the calcining section is arranged at the middle lower part of the outer wall of the box girder in the height direction, the preheating section is arranged at the middle upper part of the outer wall of the box girder in the height direction, the wind pressure of hot wind flowing out from two sides of the box girder is larger than the air pressure in the lime kiln, so that the preheating section from the calcining section to the upper part has a pressure difference, under the driving of the pressure difference, the hot wind moves upwards along the gap of limestone materials and heats and calcines (roasts) the limestone materials, and the continuously input constant-temperature hot wind forms an even thermal field (the same temperature at the boundary and the center in the lime kiln) at the hot wind beam. Because a thermal field with uniform temperature is formed, and the density of the hot air is the same, all limestone particles can uniformly contact with the hot air and are calcined, namely, the calcining degree of all limestone particles is basically the same, and overburning such as different flame temperatures cannot be caused. The content of CaO in the lime is improved, namely the effective utilization rate of the limestone is improved, the activity of the finished lime product is improved, and the comprehensive quality of the lime is improved. The mode of conveying hot air by the lime kiln hot air beam for constant-temperature calcination changes the working principle of limestone calcination and has a very obvious effect on improving the quality of lime.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view C-C of a hot air beam for a lime kiln, directed toward a first end beam, according to an embodiment of the present invention;

FIG. 2 is a front view of a hot air beam for a lime kiln according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a left side view of FIG. 2;

fig. 5 is a schematic view of a V-shaped hot air passage.

The reference numerals are represented as:

1. a first hot air inlet; 2. a box girder; 3. an inner refractory wall; 4. a first cooling channel; 5. a second cooling channel; 6. a third cooling channel; 7. an outer refractory wall; 8. a spandrel girder; 9. a second hot air inlet; 10. a V-shaped hot air channel; 21. a first side member; 22. a second side member; 23. a first end beam; 24. a second end beam; 25. a cross beam; 26. a spacer beam; 41. a first cooling medium inlet; 42. a first cooling medium outlet; 51. a second cooling medium inlet; 52. a second cooling medium outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

With reference to fig. 1 to 5, the utility model provides an embodiment of hot-blast beam for lime kiln locates the hot-blast beam for lime kiln on the bottom at the high temperature center position in the lime kiln, also the section that just calcines, and keeps certain distance with the bottom for provide hot-blast for the lime kiln, hot-blast and limestone contact, accomplish the calcination of limestone, generate lime. The temperature of the hot air is 600-1250 ℃, such as 1000-1250 ℃. Assuming that the calcination temperature is 1000 ℃, the hot air temperature is 1000 ℃, and the hot air, i.e. the high-temperature gas medium, can be hot air, hot flue gas or hot CO₂Other gaseous media are also possible.

The lime kiln is with hot-blast roof beam includes first hot-blast entry 1 and has one end open-ended box girder 2, in the lime kiln was located to box girder 2, the opening of box girder 2 was towards lime kiln bottom, just the distance of opening and lime kiln bottom is greater than zero, first hot-blast entry 1 is located on the box girder 2, in having certain wind pressure hot-blast entering box girder 2 from first hot-blast entry 1, atmospheric pressure in the box girder 2 grows gradually, the meaning flows from the opening of box girder 2 lower extreme, and the hot-blast of outflow can upwards rise in the lime kiln from the opening outside, then contacts with the lime stone that upper portion fell down, and lime stone absorbs the heat and decomposes the back and becomes lime.

The box girder 2 includes a first side girder 21, a second side girder 22, a first end girder 23, a second end girder 24, and a cross girder 25; the first side beam 21, the second side beam 22, the first end beam 23 and the second end beam 24 enclose a circumferentially closed quadrangle, the box beam 2 is a beam structure, so the box beam is a slender structure, and the cross section of the box beam 2 can be a rectangular, square or arched structure, specifically, the first side beam 21 and the second side beam 22 are in the length direction of the box beam 2, and the length dimension of the two is far larger than the distance between the two, that is, far larger than the width dimension of the first end beam 23 and the second end beam 24. The specific installation mode is as follows: the first side member 21 and the second side member 22 are disposed opposite to each other; the first end beam 23 and the second end beam 24 are oppositely arranged; the cross member 25 covers the tops of the first side member 21, the second side member 22, the first end member 23, and the second end member 24, and no beam body is provided on the opposite surface of the cross member 25, so that an opening of the one end of the box girder 2 is formed.

The first hot air inlet 1 penetrates through the first end beam 23, the first hot air inlet 1 is connected with a pipeline for conveying hot air, the hot air is rapidly mixed with air of the box beam 2 along the length direction of the box beam 2, the farthest distance for the hot air to flow in the box beam 2 is the inner wall of the second end beam 24, impact of the hot air and the inner wall of the box beam 2 is reduced, and energy loss is reduced. Then, the hot air of the box girder 2 mainly flows into the lime kiln from the first side beam 21 and the second side beam 22 of the box girder 2, and is also blown into the lime kiln from two sides of the girder body of the box girder 2, so as to form a hot air channel in the box girder, namely, the hot air is blown to the middle part of the lime kiln from two sides of the box girder 2.

The wind pressure of the hot wind conveyed into the box girder 2 is uniform and equal, so the wind pressure in the conveying pipeline is also uniform and equal, the wind pressure entering the box girder 2 is also uniform and equal, and the density of the hot wind outside the box girder 2 of the lime kiln is the same.

According to the working principle of the lime kiln, the calcining section is arranged at the middle lower part of the outer wall of the box girder 2 in the height direction, the preheating section is arranged at the middle upper part of the outer wall of the box girder 2 in the height direction, the wind pressure of hot wind flowing out from two sides of the box girder 2 is larger than the air pressure in the lime kiln, so that the preheating section from the calcining section to the upper part has a pressure difference, under the driving of the pressure difference, the hot wind moves upwards along the gap of limestone materials and heats and calcines (roasts) the limestone materials, and the continuously input constant-temperature hot wind forms an even thermal field (the same temperature at the boundary and the center in the lime kiln) at the hot wind beam. Because a thermal field with uniform temperature is formed, and the density of the hot air is the same, all limestone particles can uniformly contact with the hot air and are calcined, namely, the calcining degree of all limestone particles is basically the same, and overburning such as different flame temperatures cannot be caused. The content of CaO in the lime is improved, namely the effective utilization rate of the limestone is improved, the activity of the finished lime product is improved, and the comprehensive quality of the lime is improved. The mode of conveying hot air by the lime kiln hot air beam for constant-temperature calcination changes the working principle of limestone calcination and has a very obvious effect on improving the quality of lime.

Preferably, as shown in fig. 2 and 4, the hot air beam for the lime kiln further includes a partition beam 26 disposed inside the box beam 2 and having the same direction and the same height as the first end beam 23, wherein the partition beam 26 is disposed in the longitudinal direction of the first side beam 21 and is connected to the first side beam 21, the second side beam 22 and the cross beam 25; the arrangement of the partition beams 26 enables the box girder 2 to become two independent hot air conveying spaces, and then a second hot air inlet 9 needs to be arranged on the hot air girder for the lime kiln, the second hot air inlet 9 penetrates through the second end beam 24, and the hot air entering from each hot air inlet can flow onto the partition beam 26 furthest. The wind pressure of the hot wind in each independent hot wind conveying space is rapidly increased, (and the wind pressure at each position is equal), so that the speed of the hot wind flowing out of the lime kiln from the first side beam 21 and the second side beam 22 of the box beam 2 can be increased, and the wind pressure just flowing out is equal at each position, thereby increasing the calcining speed of the limestone.

Preferably, as shown in fig. 3, the hot air beam for the lime kiln further includes a first cooling channel 4, the first cooling channel 4 is disposed on an inner wall of the first side beam 21, that is, between the inner wall of the first side beam 21 and the inner refractory wall 3, the first cooling channel 4 is U-shaped, and two vertical sides of the U-shape are in the same length direction as the first side beam 21. The first cooling channel 4 comprises a first cooling medium inlet 41 and a first cooling medium outlet 42, wherein a cooling medium (which can be heat conducting oil or water) enters from the first cooling medium inlet 41, and flows and circulates out from the first cooling medium outlet 42, so that the function of cooling the hot air beam is achieved, and the structure (metal structure) of the hot air beam for the lime kiln is prevented from being damaged by high temperature.

As shown in fig. 2 and 3, the hot air beam for the lime kiln further includes a second cooling channel 5, the second cooling channel 5 is disposed on an inner wall of the second side beam 22, that is, between the inner wall of the second side beam 22 and the inner refractory wall 3, the second cooling channel 5 is U-shaped, and two vertical sides of the U-shape are in the same length direction as the second side beam 22. The second cooling channel 5 comprises a second cooling medium inlet 51 and a second cooling medium outlet 52, wherein the cooling medium enters from the second cooling medium inlet 51, flows and circulates out from the second cooling medium outlet 52, and plays a role of cooling the hot blast beam, so that the structure (metal structure) of the hot blast beam for the lime kiln is prevented from being damaged by high temperature.

If the first cooling channel 4 and the second cooling channel 5 are arranged at the same time, the damage of the hot air and the temperature of the lime kiln to the side beam of the hot air beam is reduced, and the damage of the structure (metal structure) of the hot air beam for the lime kiln, which is caused by high temperature, is avoided.

In addition, if only the first cooling passage 4 or the second cooling passage 5 is provided, it is also possible to function as a cooling hot air beam. The structure (metal structure) of the hot air beam for the lime kiln is prevented from being damaged by high temperature.

Preferably, as shown in fig. 3, a third cooling channel 6 is further included, and the third cooling channel 6 is disposed on the inner wall of the cross beam 25 and functions to cool the hot blast beam, so as to prevent, i.e., prevent the structure (metal structure) of the hot blast beam for the lime kiln from being damaged by high temperature.

Preferably, as shown in fig. 3, the hot air beam for the lime kiln further includes an inner refractory wall 3, and the inner refractory wall 3 is disposed on the inner walls of the first side beam 21, the second side beam 22, the first end beam 23, the second end beam 24 and the cross beam 25, that is, the inner refractory wall 3 is attached to the inner wall of the box beam 2, and has the same shape as the inner wall of the box beam 2. The inner refractory wall 3 is made of refractory materials, and can be specifically built by fire-formed refractory bricks, and the patterns of the refractory bricks can be the same or different. When the temperature of the hot air reaches a certain temperature, for example, above 800 ℃, the function of protecting the box girder 2 by heat insulation can be achieved, namely, the structure (metal structure) of the hot air girder for the lime kiln is prevented from being damaged by high temperature, and in addition, the unnecessary heat loss caused by the excessive heat taken away by the cooling medium of the box girder 2 is avoided.

As shown in fig. 3, the hot blast beam for the lime kiln further includes an outer refractory wall 7, where the outer refractory wall 7 is disposed outside the first side beam 21, the second side beam 22, the first end beam 23, the second end beam 24, and the cross beam 25, that is, the outer refractory wall 7 is attached to the outer wall of the box beam 2 and located between the outer wall and the bearing beam 8, and the outer refractory wall 7 is made of a refractory material, and may specifically be an abrasion-resistant castable or another form of refractory material. When the temperature of the hot air reaches a certain temperature, for example, above 800 ℃, the function of protecting the box girder 2 by heat insulation can be achieved, and the heat loss caused by the excessive heat taken away by the cooling medium of the box girder 2 is avoided. .

When the inner refractory wall 3 and the outer refractory wall 7 are jointly adopted, the whole lime kiln hot air beam is in the heat insulation protection of refractory materials, and the heat loss caused by the fact that excessive heat is taken away by the cooling medium of the box beam 2 is avoided.

Preferably, as shown in fig. 3, the included angle formed by the first side member 21 and the cross member 25 is 89 to 85 degrees, that is, the bottom end of the first side member 21 is contracted toward the inside of the opening by an angle of 1 ° to 5 °, such as 1 °, 2 °, 3 °, 4 °, 5 °, so as to facilitate fixing of the inner fire-resistant wall 3 on the first side member 21.

Furthermore, the included angle formed by the second side beam 22 and the cross beam 25 is 89 to 85 degrees, that is, the bottom end of the second side beam 22 is contracted towards the inside of the opening by an angle of 1 to 5 degrees, such as 1, 2, 3, 4 and 5 degrees, so as to facilitate fixing the inner refractory wall 3 on the second side beam 22.

Preferably, as shown in fig. 1, the limestone support device further comprises a bearing beam 8 for connecting the limestone support device, wherein the bearing beam 8 is arranged on the cross beam 25, and the bearing beam 8 is in a frame form. The middle part of the kiln body is located to the hot-blast roof beam for the lime kiln, also is the section of calcining of lime kiln, so through bearing the device and the lime stone provides the atress support for the lime stone on spandrel girder 8, make the utility model discloses a hot-blast roof beam can bear the pressure and the impact that the upper portion lime stone bore the device and the lime stone material under high temperature, the lime stone that so lime stone bore the device just can drop downwards from the upper portion of case roof beam 2, with the inside hot-blast contact of outwards flowing at case roof beam 2, reaches the purpose that the lime stone calcines.

Through the arrangement, the utility model discloses just possess two kinds of functional areas with hot-blast roof beam: namely a quicklime bearing area at the upper part and a hot air supply area at the lower part, thereby simplifying the calcining functional area in the lime kiln.

Preferably, the cross-section of the cross-beam 25 is rectangular, and the cross-section of the cross-beam 25 can also be square or arched. Adopt rectangle or square cross-section, the lime stone that drops on crossbeam 25 upper portion forms the material and piles up, protection crossbeam 25, directly drops on the lime stone of crossbeam 25 when the lime stone drops, avoids all lime stones all at every turn all directly to contact with crossbeam 25 to reduce the direct wearing and tearing of material to hot-blast roof beam upper portion, and it is convenient to make.

Preferably, as shown in fig. 5, the limestone outlet direction of the limestone carrying device is directed to the bottom of the lime kiln, so that limestone is accumulated on the outer sides of the first side beam 21 and the second side beam 22, and since the first side beam 21 and the second side beam 22 are spaced from the bottom of the lime kiln by a certain distance, the dropped lime flows to the lower side of the opening of the box beam 2, and a V-shaped cross section is formed below the opening, so that hot air flows into the V-shaped cross section and flows out when flowing out from the inner sides of the first side beam 21 and the second side beam 22. That is, the calcined lime falling on the bottom of the lime kiln below the opening of the hot blast beam forms a V-shaped hot blast passage 10 together with the bottom end of the first side beam 21 and the bottom end of the second side beam 22, which assists the hot blast of the hot blast passage in the box girder 2 to rapidly flow to the outside of the first side beam 21 and the second side beam 22.

When the hot air of the box girder 2 mainly flows out of the lime kilns outside the first side girder 21 and the second side girder 22 of the box girder 2, the hot air collides with the V-shaped hot air channel 10, namely, the hot air collides with the lime falling to the bottom end of the first side girder 21, the bottom end of the second side girder 22 and the opening, and then the hot air is rebounded back and flows out of the lime kilns outside the first side girder 21 and the second side girder 22, thereby increasing the flow rate of the hot air, improving the contact frequency of the limestone and the hot air, and accelerating the calcining speed.

Similarly, the hot air pressure in the V-shaped hot air channel 10 is equal, so the hot air density outside the box beam 2 of the lime kiln is the same. The lime kiln comprises hot air with the same density and a thermal field with uniform temperature, so that all limestone particles can be contacted and calcined by the hot air uniformly, and the calcination degree of all limestone particles is closer. The content of CaO in the lime is increased, namely the effective utilization rate of the limestone is increased, and meanwhile, the activity of the finished lime product is increased, and the quality of the lime is improved.

Preferably, the utility model discloses still provide a lime kiln, lime kiln includes the hot-blast beam for lime kiln of any preceding embodiment for calcine the lime stone. The hot air beam for the lime kiln transversely penetrates through the middle part in the lime kiln, the opening of the box beam 2 faces the bottom of the lime kiln, and the distance between the opening and the bottom of the lime kiln is greater than zero. The number of the lime kiln hot air beams can be 1, or a plurality of lime kiln hot air beams, and when a plurality of lime kiln hot air beams are adopted, the lime kiln hot air beams can be arranged in parallel (namely the direction of the first side beam 21 of the box beam 2), also arranged in a cross mode, or arranged in a diverging mode by taking the center of the lime kiln as a reference center, or in a cross mode.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, the invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A hot blast beam for a lime kiln, comprising: the lime kiln comprises a first hot air inlet (1) and a box girder (2) with an opening at one end, wherein the first hot air inlet (1) is arranged on the box girder (2), the box girder (2) is arranged in the lime kiln, the opening of the box girder (2) faces the bottom of the lime kiln, and the distance between the opening and the bottom of the lime kiln is greater than zero;

the box girder (2) comprises: a first side member (21), a second side member (22), a first end beam (23), a second end beam (24), and a cross member (25);

the first side beam (21), the second side beam (22), the first end beam (23) and the second end beam (24) enclose a quadrilateral with a closed circumferential direction, and the first side beam (21) and the second side beam (22) are arranged oppositely; the first end beam (23) and the second end beam (24) are oppositely arranged; the cross beam (25) covers the tops of the first side beam (21), the second side beam (22), the first end beam (23) and the second end beam (24);

the first hot air inlet (1) penetrates through the first end beam (23).

2. The hot air beam for the lime kiln according to claim 1, further comprising a partition beam (26) provided inside the box beam (2) and having the same direction and height as the first end beam (23), wherein the partition beam (26) is provided in the longitudinal direction of the first side beam (21) and connected to the first side beam (21), the second side beam (22) and the cross beam (25), respectively;

the hot air beam for the lime kiln further comprises a second hot air inlet (9), and the second hot air inlet (9) penetrates through the second end beam (24).

3. The hot air beam for lime kilns as claimed in claim 1, further comprising a first cooling channel (4), wherein the first cooling channel (4) is arranged on the inner wall of the first side beam (21), the first cooling channel (4) is U-shaped, two vertical sides of the U-shape are the same as the length direction of the first side beam (21), the first cooling channel (4) comprises a first cooling medium inlet (41) and a first cooling medium outlet (42), the first cooling medium inlet (41) is arranged on the U-shaped vertical side close to the opening side of the box beam (2), and the first cooling medium outlet (42) is arranged on the U-shaped vertical side far away from the opening side of the box beam (2); and/or the cooling structure further comprises a second cooling channel (5), wherein the second cooling channel (5) is arranged on the inner wall of the second side beam (22), the second cooling channel (5) is U-shaped, two vertical edges of the U-shaped are the same as the length direction of the second side beam (22), the second cooling channel (5) comprises a second cooling medium inlet (51) and a second cooling medium outlet (52), the second cooling medium inlet (51) is arranged on the U-shaped vertical edge close to the opening side of the box beam (2), and the second cooling medium outlet (52) is arranged on the U-shaped vertical edge far away from the opening side of the box beam (2).

4. The hot blast beam for lime kilns according to claim 3, characterized in that it further comprises a third cooling channel (6), said third cooling channel (6) being provided on the inner wall of said cross beam (25).

5. The hot wind beam for the lime kiln according to claim 3 or 4, further comprising an inner refractory wall (3), wherein the inner refractory wall (3) is provided on an inner wall of the first side beam (21), the second side beam (22), the first end beam (23), the second end beam (24) and the cross beam (25), and/or further comprising an outer refractory wall (7), wherein the outer refractory wall (7) is provided on an outer side of the first side beam (21), the second side beam (22), the first end beam (23), the second end beam (24) and the cross beam (25).

6. The hot blast beam for lime kilns according to claim 5, characterized in that the first side beams (21) form an angle of 89 to 85 degrees with the cross beam (25); and/or the included angle formed by the second side beam (22) and the cross beam (25) is 89-85 degrees.

7. The hot blast beam for lime kilns according to claim 1, characterized in that it further comprises a bearing beam (8) for connecting limestone bearing means, said bearing beam (8) being arranged above said cross beam (25).

8. The hot blast beam for lime kilns according to claim 7, characterized in that the cross-beam (25) is rectangular in cross-section.

9. The hot blast beam for lime kiln as claimed in claim 7, wherein the limestone outlet of the limestone carrying device is directed to the bottom of the lime kiln, and the quicklime generated by calcination and falling on the bottom of the lime kiln below the opening of the hot blast beam forms a V-shaped hot blast passage (10) with the first and second side beams (21, 22).

10. Lime kiln, characterized in that it comprises a hot-blast beam for lime kiln according to any of claims 1-4, 7-9, which is arranged in the middle inside the lime kiln, the box beam (2) opening towards the bottom of the lime kiln, and the distance of the opening from the bottom of the lime kiln is greater than zero.