External combustion type multi-combustion calcining furnace
By setting up multiple inclined combustion chambers and a swirling fluid structure in the calcining furnace, the problems of high-temperature damage and low calcination efficiency of existing equipment have been solved, resulting in extended equipment life and improved product quality.
Patent Information
- Application Number
- CN202520032262.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Existing calcination equipment suffers from frequent damage to the refractory material on the furnace wall during combustion, equipment damage caused by high-temperature conductive and radiant heat, long calcination time, low product quality, and environmental and energy-saving issues.
Design an external combustion multi-combustion calcining furnace, including a combustion section, an acceleration section and a calcination section. Multiple inclined combustion chambers are arranged around the combustion section to disperse heat. A swirling fluid structure is adopted to reduce the damage of high-temperature flue gas to the equipment, and the material rise is accelerated through a venturi tube.
It effectively reduces nitrogen oxide generation, extends equipment lifespan, improves product quality and production stability, reduces maintenance costs, and achieves a more efficient calcination process.
Smart Images
Figure CN223663711U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to calcining furnace technical field, concretely relates to a external combustion formula many combustion calcining furnace. BACKGROUND
[0002] The existing calcining equipment is suitable for chemical industry, nonmetallic mine, inorganic salt and the like industry, and the commonly used calcining equipment includes calcining furnace, reflection kiln, rotary kiln and the like, the heat generated by combustion is concentrated in the use process of the existing calcining equipment, the long time high temperature hot flue gas roasting in the combustion chamber, the high temperature conduction heat and the high temperature environment radiation heat cause the frequent damage of the refractory material of the inner wall of the furnace, the daily maintenance cost is big, and the problems such as discontinuity, long calcining time, low product quality, poor production environment and energy saving and environmental protection exceeding standard in the production process occur in the calcining process. SUMMARY
[0003] Therefore, the utility model embodiment provides a external combustion formula many combustion calcining furnace to solve the above-mentioned technical problems.
[0004] In order to realize the above-mentioned purpose, the utility model embodiment provides the following technical scheme:
[0005] A external combustion formula many combustion calcining furnace, including the combustion section, acceleration section, feeding section and calcining section that are sequentially connected from bottom to top,
[0006] Wherein, the combustion section is the pipeline structure of bottom closed, and the combustion section is provided with a plurality of combustion chambers on the circumferential side, a plurality of the combustion chambers are distributed on the circumferential side of the combustion section at intervals, the combustion chamber is communicated with the inside of the combustion section, and the combustion chamber is inclinedly arranged, the axial direction of the combustion chamber is towards the top opening of the combustion section, and the projection of the axial direction of the combustion chamber on the horizontal plane is towards the tangential direction of the combustion section;
[0007] The bottom of the acceleration section is connected to the top of the combustion section, and the acceleration section is a venturi tube;
[0008] The bottom of the feeding section is connected to the top of the acceleration section, and one side of the feeding section is provided with a feeding port, and the feeding port is inclinedly arranged from top to bottom on one side of the feeding section;
[0009] The bottom of the calcining section is connected to the top of the feeding section.
[0010] Optionally, the combustion chamber and the combustion section are fixedly connected;
[0011] And the combustion chambers are distributed on the circumferential side of the combustion section at equal intervals.
[0012] Optionally, the combustion chamber and the combustion section are integrally formed.
[0013] Optionally, the combustion chamber is provided with three.
[0014] Optionally, the acceleration section is fixedly connected with the combustion section.
[0015] The feeding section is fixedly connected with the acceleration section.
[0016] The calcination section is fixedly connected with the feeding section.
[0017] Optionally, the calcination section comprises a first straight section and a second straight section.
[0018] The first straight section and the second straight section are both straight pipes, the bottom of the first straight section is fixedly connected with the top of the feeding section, the second straight section is arranged in parallel with the first straight section, the top end of the second straight section is fixedly connected with the top end of the first straight section through an adapter section, the first straight section and the second straight section form an inverted U-shaped structure, and the bottom end of the second straight section is connected with an outlet section.
[0019] Optionally, the bottom of the combustion section is provided with an ash discharge hole.
[0020] Optionally, the first straight section comprises a plurality of first unit sections, flanges are arranged at both ends of each first unit section, the lowermost first unit section is fixedly connected with the feeding section through the flanges, adjacent two first unit sections are fixedly connected through the flanges, and the uppermost first unit section is fixedly connected with the adapter section through the flanges.
[0021] Optionally, the second straight section comprises a plurality of second unit sections, flanges are arranged at both ends of each second unit section, the uppermost second unit section is fixedly connected with the adapter section through the flanges, adjacent two second unit sections are fixedly connected through the flanges, and the lowermost second unit section is fixedly connected with the outlet section through the flanges.
[0022] The present application has at least the following advantages:
[0023] The present application has at least the following advantages: BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the prior art and the present application, the drawings needed in the description of the prior art and the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.
[0025] The structures, proportions, sizes, etc. shown in the specification are merely used to cooperate with the disclosed content, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the utility model. Any modification of the structure, change of the proportion relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope covered by the disclosed technical content of the utility model.
[0026] Fig. 1 Fig. 2 is a schematic diagram of the internal structure of the calcining furnace according to an embodiment of the utility model;
[0027] Fig. 2 Fig. 3 is a schematic diagram of the internal structure of the lower half of the calcining furnace according to an embodiment of the utility model;
[0028] Fig. 3 Fig. 4 is a schematic diagram of the combustion section structure according to an embodiment of the utility model.
[0029] Legend of reference signs:
[0030] 1, combustion section; 2, acceleration section; 3, feeding section; 4, calcining section; 41, first straight section; 42, second straight section; 43, transition section; 44, outlet section; 5, combustion chamber; 6, feeding port; 7, ash discharge hole. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.
[0032] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more. The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the utility model and the above-mentioned drawings are intended to distinguish the objects referred to. For the scheme with time sequence flow, this kind of term expression method should not be understood as describing a specific order or sequence, and for the scheme of device structure, this kind of term expression method does not distinguish importance, position relationship, etc.
[0033] In addition, the terms "include", "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units explicitly listed, but can also include other steps or units inherent to these processes, methods, products or devices, or steps or units added based on further optimization of the concept of the utility model.
[0034] AsFigs. 1-3 The utility model discloses a kind of external combustion type multi-combustion calcining furnaces, including combustion section 1, acceleration section 2, feeding section 3 and calcining section 4 sequentially connected from bottom to top are arranged;
[0035] Wherein, the combustion section 1 is the pipeline structure of bottom closed, the periphery of combustion section 1 is provided with multiple combustion chambers 5, multiple the combustion chamber 5 is distributed at the periphery of combustion section 1 with interval, the combustion chamber 5 is communicated with the inside of combustion section 1, the combustion chamber 5 is obliquely arranged, the axial direction of combustion chamber 5 is towards the opening of top end of combustion section 1, and the projection of axial direction of combustion chamber 5 in horizontal plane is towards the tangential direction of combustion section 1;
[0036] The bottom of the acceleration section 2 is connected to the top of the combustion section 1, and the acceleration section 2 is a Venturi tube;
[0037] The bottom of the feeding section 3 is connected to the top of the acceleration section 2, and one side of the feeding section 3 is provided with a feeding port 6.
[0038] The bottom of the calcining section 4 is connected to the top of the feeding section 3.
[0039] The above-mentioned combustion section 1 is arranged on the ground as a base structure, and the internal space and the opening at the top serve as a flue gas circulation channel. Multiple combustion chambers 5 are arranged on the periphery of the combustion section 1 to allow more materials to be burned simultaneously. The size of each combustion chamber 5 is appropriately reduced. The combustion chamber 5 is specifically arranged as follows:
[0040] One end of the combustion chamber 5 is fixed to the side wall of the combustion section 1, and the internal space of the combustion chamber 5 is communicated with the internal space of the combustion section 1, so that the flue gas generated by the combustion of the combustion chamber 5 can enter the combustion section 1 and rise to the acceleration section 2 and other structures above. The combustion chamber 5 needs to be obliquely arranged, with one side connected to the combustion section 1 being higher and the side away from the combustion section 1 being lower. The side away from the combustion section 1 serves as a material inlet. That is, the combustion chamber 5 is obliquely arranged in the vertical direction, forming a certain angle with the combustion section 1. Specifically, the angle between the combustion chamber 5 and the combustion section 1 can be 75°. In addition to being obliquely arranged in the vertical direction, the combustion chamber 5 is not directly opposite the combustion section 1, and the axis of the combustion chamber 5 does not intersect the axis of the combustion section 1. Specifically, the axial direction of the combustion chamber 5 is towards the tangential direction of the combustion section 1, so that the flue gas of multiple combustion chambers 5 can form a rotational flow when flowing into the combustion section 1, effectively driving the material in the feeding section 3 to rise and avoiding the problem of material falling.
[0041] The material completes the process of temperature rise and partial decomposition in the calcining section 4.
[0042] A dust discharging hole 7 is formed in the bottom of the combustion section 1 to facilitate dust discharging.
[0043] In more specific embodiments, the combustion chamber 5 is fixedly connected to the combustion section 1, and the combustion chamber 5 is equidistantly distributed around the side of the combustion section 1. The combustion chamber 5 is integrally formed with the combustion section 1. The combustion chamber 5 is provided with three.
[0044] In some specific embodiments, the acceleration section 2 is fixedly connected to the combustion section 1, the feeding section 3 is fixedly connected to the acceleration section 2, and the calcination section 4 is fixedly connected to the feeding section 3.
[0045] Specifically, the calcination section 4 includes a first straight section 41 and a second straight section 42.
[0046] The first straight section 41 and the second straight section 42 are both straight pipe structures. The bottom of the first straight section 41 is fixedly connected to the top of the feeding section 3. The second straight section 42 is arranged in parallel with the first straight section 41. The top end of the second straight section 42 is fixedly connected to the top end of the first straight section 41 through an adapter section 43. The first straight section 41 and the second straight section 42 form an inverted U-shaped structure. The bottom end of the second straight section 42 is connected to an outlet section 44.
[0047] The combustion section 1 is arranged as the first straight section 41 and the second straight section 42, and the flow direction of the flue gas is turned by 180° through the adapter. This can effectively reduce the height of the equipment, while having sufficient length to complete the calcination process of the material.
[0048] In another embodiment, the first straight section 41 and the second straight section 42 can be arranged as follows: the first straight section 41 includes a plurality of first unit sections. The two ends of each first unit section are provided with flanges. The lowermost first unit section is fixedly connected to the feeding section 3 through the flanges. The adjacent two first unit sections are fixedly connected through the flanges. The uppermost first unit section is fixedly connected to the adapter section 43 through the flanges.
[0049] The second straight section 42 includes a plurality of second unit sections. The two ends of each second unit section are provided with flanges. The uppermost second unit section is fixedly connected to the adapter section 43 through the flanges. The adjacent two second unit sections are fixedly connected through the flanges. The lowermost second unit section is fixedly connected to the outlet section 44 through the flanges.
[0050] By arranging the first straight section 41 and the second straight section 42 as a spliced unit structure, different numbers of unit sections can be connected according to requirements, so as to change the length of the first straight section 41 and the second straight section 42.
[0051] The utility model discloses an external combustion multi-combustion rotary flow calcining furnace which is composed of an external combustion multi-combustion rotary flow body (combustion chamber 5), an acceleration section 2, a feeding section 3, a first straight section 41, a second straight section 42 and an outlet section 44. The external combustion multi-combustion rotary flow body is provided with multiple combustion chambers 5, each of which has a relatively reduced combustion space. The fuel is combusted in the multiple combustion chambers 5, and the heat is dispersed. The combustion temperature of each combustion chamber 5 is relatively reduced, and the temperature is controlled below 1150 DEG C, so that the generation of nitrogen oxides can be effectively reduced. The entire calcining furnace is operated under negative pressure, and the high-temperature hot flue gas after combustion will not be gathered in the combustion chamber 5 in a large amount. Under the action of the system negative pressure and the rotary flow body, the high-temperature flue gas and the material are rotated and moved upward. This structure can effectively avoid the damage of the high-temperature flue gas baking, high-temperature conduction heat and high-temperature environmental radiation heat to the inner wall of the combustion chamber 5, and the service life is improved. Under the action of the system negative pressure and the rotary flow body, the high-temperature hot flue gas instantaneously passes through the acceleration body section, the wind speed of the high-temperature hot flue gas is instantaneously increased by 2-4 m / s, the material enters the furnace from the feeding section 3, and is carried by the high-speed high-temperature hot flue gas and rotated and moved upward. The acceleration section 2 can effectively avoid the material falling problem. The material passes through a straight section to complete the material heating and partial decomposition process, and then passes through a second straight section to completely complete the calcination process in the second straight section. During the calcination process of the raw material in the external combustion multi-combustion rotary flow calcining furnace, the high-temperature hot flue gas and the material are in a rotary floating state, the gas-solid mixing is sufficient, the calcination specific surface area is large, and the production stability ensures the stability of the product quality during the calcination process.
[0052] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.
[0053] The technical features of the above embodiments can be combined arbitrarily (as long as the combination of the technical features does not exist contradiction), and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described; these embodiments which are not explicitly written should also be considered as the scope of the description.
[0054] The utility model has been described in the above in detail and specifically through general statement and specific embodiment. It should be pointed out that on the premise of not departing from the utility model concept, obviously, a number of deformations and improvements can be made to these specific embodiments, and these all belong to the protection scope of the application. Therefore, the protection scope of the application patent should be subject to the appended claims.
Claims
1. An externally fired multi-combustion calciner characterized by: The combustion section, the accelerating section, the feeding section and the calcining section are sequentially connected from bottom to top; The combustion section is a pipeline structure with a closed bottom, and a plurality of combustion chambers are arranged on the periphery of the combustion section. The bottom of the accelerating section is connected to the top of the combustion section, and the accelerating section is a Venturi tube. The bottom of the feeding section is connected to the top of the accelerating section, and one side of the feeding section is provided with a feeding port. The bottom of the calcining section is connected to the top of the feeding section.
2. The externally fired multi-combustion calciner according to claim 1, characterized in that: The combustion chambers are fixedly connected to the combustion section. The combustion chambers are equidistantly distributed on the periphery of the combustion section.
3. An externally fired multi-combustion calciner according to claim 2, characterized in that: The combustion chambers are integrally formed with the combustion section.
4. The externally fired, multi-burn calciner of claim 3, wherein: The combustion chambers are provided with three.
5. The externally fired, multi-burn calciner of claim 1, wherein: The accelerating section is fixedly connected to the combustion section. The feeding section is fixedly connected to the accelerating section. The calcining section is fixedly connected to the feeding section.
6. The externally fired, multi-burn calciner of claim 1, wherein: The calcining section comprises a first straight section and a second straight section. The first straight section and the second straight section are both straight pipe structures.
7. The externally fired, multi-burner calciner of claim 1 wherein: The bottom of the first straight section is fixedly connected to the top of the feeding section.
8. An externally fired, multi-combustion calciner according to claim 6, characterized in that: The top end of the second straight section is fixedly connected to the top end of the first straight section through an adapter section.
9. An externally fired, multi-combustion calciner according to claim 6, characterized in that: The first straight section and the second straight section form an inverted U-shaped structure. The bottom of the combustion section is provided with an ash discharge hole. The first straight section comprises a plurality of first unit sections. The two ends of each first unit section are provided with flanges. The lowermost first unit section is fixedly connected to the feeding section through the flanges. The uppermost first unit section is fixedly connected to the adapter section through the flanges. The second straight section comprises a plurality of second unit sections. The two ends of each second unit section are provided with flanges. The uppermost second unit section is fixedly connected to the adapter section through the flanges. The lowermost second unit section is fixedly connected to the outlet section through the flanges.