Building gypsum powder rotary pipe calcining kiln
By setting up a heat source flue gas chamber on the outside of the rotary tube kiln and connecting it with the circulation pipeline on the inner wall of the kiln, the problem of insufficient heat source contact area of the internal and external mixed-fired rotary kiln is solved, and efficient heat utilization and environmentally friendly gypsum calcination process is achieved, which reduces the equipment cost.
Patent Information
- Application Number
- CN202420283467.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-06
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-02-06
AI Technical Summary
The contact area between the heat source flue gas chamber of the existing internal and external mixed-fired rotary kiln equipment and the kiln body is too small, resulting in insufficient heat conduction. The equipment length needs to be increased to compensate for insufficient heat exchange, which increases production and operation costs.
A heat source flue gas chamber is set up on the outside of the rotary tube kiln body, and is connected to the circulation pipeline of the inner wall of the kiln body through the flue gas pipeline, optimizing the heat source position to increase the contact area between the heat source and the material and improving thermal efficiency.
By increasing the contact area between the heat source and the material, the thermal energy utilization rate is improved, and the efficient preheating, drying and calcining process is achieved, which reduces equipment costs and operating costs, and is also environmentally friendly.
Smart Images
Figure CN222211194U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building material calcining equipment, in particular to a building gypsum powder spiral tube calcining kiln. Background Art
[0002] At present, the calcining equipment commonly used for building gypsum powder can be divided into two categories from the perspective of equipment operation: continuous calcining equipment and intermittent calcining equipment. From the perspective of heat transfer, it can be divided into two categories: internal calcining equipment and external calcining equipment. From the perspective of equipment form, it can be mainly divided into two types: rotary kiln and wok. The rotary kiln has become the mainstream equipment for gypsum production because of its reliable technology, stable operation and simple operation.
[0003] The application of rotary kiln equipment in the field of gypsum calcination has gone through the following development stages: (1) intermittent externally fired rotary kiln, (2) continuous externally fired rotary kiln, and (3) internally and externally fired mixed rotary kiln. The most advanced one at present is the internally and externally fired mixed rotary kiln, in which the heat source flue gas does not directly contact the calcined material, and the movement of the material in the kiln is not affected by the hot air volume and air pressure. The internal circulation pipeline can ensure that the material is fully heated, thereby improving the product output and quality. However, its disadvantage is that the heat source is set at one end of the kiln body, and the contact area between the heat source flue gas chamber and the kiln body is too small, and the heat conduction effect of the cylinder cannot be fully utilized to heat the material, resulting in an increase in the heat exchange pressure of the circulation pipeline in the kiln. It is necessary to increase the length of the equipment and increase the heat exchange surface of the pipeline to compensate for the lack of heat exchange, thereby increasing the production cost of the equipment. Utility Model Content
[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a high-efficiency gypsum spiral calcining kiln which optimizes the position of the heat source, increases the heat exchange area of the equipment, thereby increasing the contact area between the heat source and the material and improving the utilization rate of heat energy.
[0005] The technical solution adopted to achieve the above utility model purpose is:
[0006] A building gypsum powder rotary tube calcining kiln comprises a rotary tube kiln body which is divided into a head feeding drying section, a middle calcining section and a tail discharging section according to the feeding sequence, and a flue gas duct arranged inside the rotary tube kiln body, wherein a heat source flue gas chamber which can cover the rotary tube kiln body is arranged outside the rotary tube kiln body.
[0007] The heat source smoke chamber is connected with the central smoke duct through a smoke duct and a circulation duct arranged along the inner wall of the calcining kiln body.
[0008] A smoke exhaust sealing pipe is installed at the end of the central smoke duct.
[0009] The heat source smoke chamber is arranged between two supporting devices of the rotary kiln body.
[0010] The utility model optimizes the heat source position so that the external kiln body between the rotary kiln support devices runs through the heat source flue gas chamber, thereby increasing the contact heat exchange area between the hot flue gas and the rotary kiln cylinder and improving the thermal efficiency. At the same time, the flue gas after heat exchange enters the flue gas circulation pipeline and the central pipeline inside the kiln through the flue gas channel set in the kiln body, ensuring that the material is fully heated from the feeding section to the discharging section, realizing the one-time completion of the preheating, drying and calcining process, and has the characteristics of high heat exchange efficiency, energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The utility model is a structural schematic diagram of a rotary tube calcining kiln for building gypsum powder.
[0012] In the figure, 1. rotary kiln body, 2. feeder, 3. flue gas discharge box, 4. flue gas duct, 5. central flue gas duct, 6. lifting device, 7. supporting device, 8. lower transmission device of rotary kiln, 10. heat source flue gas chamber, 11. connecting pipe, 12. discharge box. DETAILED DESCRIPTION
[0013] Combine the following Figure 1 The embodiments of the present invention will be described in detail.
[0014] The utility model of a rotary kiln for calcining building gypsum powder comprises a rotary kiln body 1, a central flue gas duct 5 in the rotary kiln body, a material lifting device 6 in the rotary kiln body, a rotary kiln lower transmission device 8 and a supporting device 7. The rotary kiln body is divided into a head feeding drying section, a middle calcining section and a tail discharging section according to the feeding sequence. A feeder 2 is installed at the head feeding section of the rotary kiln body, and a discharging box 12 is installed at the tail discharging section. The central flue gas duct 5 is connected to a flue gas discharge box 3, and the flue gas discharge box 3 is connected to a dust collector through a pipeline to discharge waste gas. A heat source flue gas chamber 10 covering the kiln body is arranged between the two supporting devices 7 of the rotary kiln body and outside the rotary kiln body. The heat source flue gas chamber 10 is connected to the flue gas ducts 4 evenly distributed inside the rotary kiln through a connecting pipe 11, and the other end of the flue gas duct 4 is connected to the central pipe. Material guide blades, auxiliary heat exchange blades, annular material baffles, etc. are installed at the head and tail of the rotary tube kiln body to enable more sufficient heat exchange of materials during the flow of materials in the furnace body, thereby reducing the size of the equipment under the same scale of production capacity and reducing the equipment processing cost and operating cost.
Claims
1. A rotary kiln for calcining building gypsum powder, comprising a rotary kiln body having a head feeding section, a middle calcining section and a tail discharging section, and a central flue gas duct (5) arranged inside the rotary kiln body, wherein: A heat source smoke chamber (10) is arranged outside the middle calcining section of the rotary tube kiln body to cover the middle calcining section; The heat source flue gas chamber (10) is connected to the central flue gas duct (5) via a flue gas duct (11) and a circulation duct (4) arranged along the inner wall of the calcining kiln body.
2. A building gypsum powder rotary tube calcining kiln according to claim 1, characterized in that: A smoke exhaust box (3) is installed at the end of the central smoke duct (5).
3. A building gypsum powder rotary tube calcining kiln according to claim 1, characterized in that: The heat source smoke chamber (10) is arranged between two supporting devices (7) of the rotary tube kiln body.
4. A building gypsum powder spiral tube calcining kiln according to claim 1, characterized in that: A feeder (2) is installed at the head feeding section of the rotary kiln body, and a discharge box (12) is installed at the tail discharge section.
5. A building gypsum powder spiral tube calcining kiln according to claim 4, characterized in that: The head and tail of the rotary tube kiln body are equipped with material guide blades, auxiliary heat exchange blades and annular material blocking plates.