Heat energy utilization device for calcining low-carbon cement clinker
By using preheating pipes and solenoid valves in the cement production process, the problem of temperature drop in cement raw materials during transportation was solved, achieving efficient utilization of thermal energy and reducing fuel consumption and production costs.
Patent Information
- Application Number
- CN202423054605.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-11
AI Technical Summary
During the cement production process, the temperature of cement raw materials decreases when they are preheated by a waste heat boiler and then transported into the rotary kiln, resulting in a decrease in thermal energy utilization efficiency.
A heat energy utilization device for calcining low-carbon cement clinker is designed. By setting a preheating pipe and a solenoid valve in the feeding channel, the exhaust fan is used to transfer heat from the rotary kiln exhaust gas to the cement raw materials through the preheating pipe to maintain their temperature. When there is a blockage, the solenoid valve is switched to clear the feeding channel.
It effectively maintains the temperature of cement raw materials during transportation, improves thermal energy utilization efficiency, reduces fuel consumption, and lowers production costs.
Smart Images
Figure CN223691534U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to cement production technical field, and the specific field is a low carbon cement clinker calcination heat energy utilization device. BACKGROUND
[0002] In the cement production process, clinker calcination is an energy-intensive link. In the traditional cement clinker calcination process, the heat energy utilization efficiency is low, and a large amount of heat energy is wasted in the form of waste gas, heat dissipation, etc.
[0003] From the perspective of energy consumption, the heat energy required for cement clinker calcination is mainly derived from the combustion of fossil fuels (such as coal), and the energy cost accounts for a high proportion in the cement production cost. Effective utilization of heat energy can reduce production cost and improve the economic benefit of enterprises.
[0004] By installing waste heat boilers and other equipment, the high-temperature waste gas discharged from the calcination equipment such as the rotary kiln is recovered. When the waste gas passes through the waste heat boiler, heat is transferred to the water in the boiler, causing it to produce steam. These steam can be used to preheat raw materials, which can increase the temperature of the raw material entering the kiln by 100-200℃, thereby reducing fuel consumption during calcination.
[0005] The cement raw material of the prior art is preheated by the waste heat boiler and then transported into the rotary kiln. During the transportation process, the temperature of the cement raw material decreases due to the separation from the heat source. The utility model solves the above-mentioned problem. UTILITY MODEL CONTENTS
[0006] The utility model discloses a low carbon cement clinker calcination heat energy utilization device to solve the technical problem that the temperature of the cement raw material decreases due to the separation from the heat source after the cement raw material of the prior art is preheated by the waste heat boiler and then transported into the rotary kiln, and further provides a low carbon cement clinker calcination heat energy utilization device.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a low carbon cement clinker calcination heat energy utilization device, comprising: a rotary kiln drum, a feed inlet square cylinder is communicated with the upper end of the rotary kiln drum through an elbow, a suction fan air inlet end is connected and communicated with the upper end of the feed inlet square cylinder, an inclined feed inlet channel is communicated with the side wall of the feed inlet square cylinder, a plurality of air holes are formed in the top wall of both ends of the feed inlet channel, a plurality of preheating pipes in the feed inlet channel are connected and communicated with the air holes at both ends, the preheating pipes are "U" shaped pipes, the "U" shaped pipes are connected and communicated with the air inlet pipe and the air outlet pipe through the air holes at both ends, the middle part of the "U" shaped pipe is in contact with the bottom wall in the feed inlet channel and parallel to the inclined direction of the feed inlet channel, a gap is left between adjacent preheating pipes, the air hole close to the suction fan side is connected and communicated with the suction fan air outlet end through the air inlet pipe, and the air hole on the other side of the feed inlet channel is connected with the air outlet pipe.
[0008] Preferably, the middle part of the "U" shaped pipe of the preheating pipe is connected with the bottom wall in the feed inlet channel through a metal support.
[0009] Preferably, the exhaust pipe is connected with the waste heat boiler.
[0010] Preferably, the air inlet pipe has three branch pipes, the three branch pipes are connected with the air inlet end of the air extraction fan, the air hole and the anti-blocking air pipe respectively, the two branch pipes connected with the air hole and the anti-blocking air pipe are respectively provided with electromagnetic valves, the anti-blocking air pipe is arranged in parallel with the feeding channel, the lower part of the anti-blocking air pipe is connected with the top wall of the feeding channel through a plurality of air outlet pipes, and the air outlet pipes can help conveying in the feeding channel when air is discharged.
[0011] Compared with the prior art, the beneficial effects of the present application are:
[0012] The cement raw material enters the rotary kiln drum along the inclined feeding channel, the waste gas generated by calcination in the rotary kiln drum is transported into the preheating pipe by the air extraction fan, and the preheating pipe is heated to transfer heat to the cement raw material, so that the temperature of the cement raw material will not decrease during conveying.
[0013] When the feeding channel is blocked by too much feeding, the two electromagnetic valves are switched on and off to control the air extraction fan to discharge air into the anti-blocking air pipe and the air outlet pipe, and the air outlet pipe discharges air to dredge and help conveying in the feeding channel. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic view of the present application;
[0015] Figure 2 It is a structural cross-sectional schematic view of the present application Figure One ;
[0016] Figure 3 It is a structural cross-sectional schematic view of the present application Figure Two .
[0017] In the figure: rotary kiln drum 1; elbow 2; feeding square cylinder 3; air extraction fan 4; feeding channel 5; air hole 6; preheating pipe 7; air inlet pipe 8; exhaust pipe 9; metal support 10; electromagnetic valve 11; anti-blocking air pipe 12; air outlet pipe 13. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0019] The rotary connection in the device refers to that the bearing is baked on the shaft, the shaft or the shaft hole is provided with a spring retainer groove, the shaft is axially fixed by clamping the elastic retainer in the retainer groove, and rotation is realized.
[0020] The utility model will be explained in detail below in combination with the drawings. Embodiment
[0021] The following will be combined with the drawings Figures 1-3 The embodiment of the application discloses a low-carbon cement clinker calcination heat energy utilization device, which comprises a rotary kiln drum 1, a feeding square cylinder 3 is communicated with the upper end of the rotary kiln drum 1 through an elbow 2, an air suction fan 4 air inlet end is connected and communicated with the upper end of the feeding square cylinder 3, an inclined feeding channel 5 is communicated with the side wall of the feeding square cylinder 3, a plurality of air holes 6 are formed in the top wall of both ends of the feeding channel 5, both ends of the air holes 6 are communicated through a plurality of preheating pipes 7 in the feeding channel 5, the preheating pipes 7 are shaped as U-shaped pipes, the U-shaped pipes are communicated with air inlet pipes 8 and air outlet pipes 9 through the air holes 6 at both ends respectively, the middle part of the U-shaped pipe is in contact with the inner bottom wall of the feeding channel 5 and is parallel to the inclined direction of the feeding channel 5, gaps are left between adjacent preheating pipes 7, the air hole 6 close to the air suction fan 4 is communicated with the air outlet end of the air suction fan 4 through the air inlet pipe 8, and the air hole 6 on the other side of the feeding channel 5 is communicated with the air outlet pipe 9.
[0022] The waste gas generated by calcination in the rotary kiln drum 1 is sucked by the air suction fan 4, is transported into the air inlet pipe 8 through the elbow 2 and the square cylinder 3, is discharged through the air hole 6, the preheating pipe 7, the air hole 6 on the other side and the air outlet pipe 9, the preheating pipe 7 absorbs the heat in the waste gas, the cement raw materials enter the inclined feeding channel 5 and slide downward along the inclined direction, since the middle part of the U-shaped pipe is in contact with the inner bottom wall of the feeding channel 5 and is parallel to the inclined direction of the feeding channel 5, gaps are left between adjacent preheating pipes 7, the preheating pipes 7 transfer heat to the cement raw materials while not affecting the transportation of the raw materials, so that the temperature of the cement raw materials does not decrease in the transportation process, and the cement raw materials enter the rotary kiln drum 1 through the feeding square cylinder 3 and the elbow 2 under the action of gravity, and the transportation is completed.
[0023] The middle part of the U-shaped pipe of the preheating pipe 7 is connected with the inner bottom wall of the feeding channel 5 through a metal support 10.
[0024] The preheating pipe 7 transfers heat to the feeding channel 5 through the metal support 10, the feeding channel 5 is heated, and the cement raw materials are better heated.
[0025] The air outlet pipe 9 is communicated with the waste heat boiler.
[0026] The waste gas is discharged into the waste heat boiler through the air outlet pipe 9, and the waste heat not fully utilized by the preheating pipe 7 is utilized through the waste heat boiler.
[0027] The air inlet pipe 8 has three branch pipes, which are communicated with the air inlet end of the air exhaust fan 4, the air hole 6 and the anti-blocking air pipe 12 respectively, and the two branch pipes communicated with the air hole 6 and the anti-blocking air pipe 12 are respectively provided with electromagnetic valves 11, the anti-blocking air pipe 12 is arranged in parallel with the feeding channel 5, and the lower part of the anti-blocking air pipe 12 is communicated with the top wall of the feeding channel 5 through a plurality of air outlet pipes 13, and the air outlet pipe 13 can help conveying the cement raw materials in the feeding channel 5 when air is discharged.
[0028] When the feeding channel 5 is blocked by too much feeding materials, the two electromagnetic valves 11 are switched to open and close, the air exhaust fan is controlled to discharge air into the anti-blocking air pipe 12 and the air outlet pipe 13, and the preheating pipe 7 is not in the air inlet, the air outlet pipe 13 discharges air to unblock the cement raw materials in the feeding channel and convey the cement raw materials along the inclined direction of the feeding channel 5, and after unblocking, the two electromagnetic valves 11 are reset to continue preheating the raw materials.
[0029] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0030] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the mechanical parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.
[0031] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A low-carbon cement clinker calcination heat energy utilization device, comprising: The rotary kiln drum (1) is communicated with the feeding square cylinder (3) through the elbow (2) at the upper end, Its characterized in that: the feeding square cylinder (3) is connected and communicated with the air exhaust fan (4) air inlet end at the upper end, the feeding square cylinder (3) side wall is communicated with the inclined feeding channel (5), the feeding channel (5) both ends top wall is provided with a plurality of air holes (6), both ends air holes (6) are communicated through a plurality of preheating pipes (7) in the feeding channel (5), the preheating pipe (7) shape is "U" shaped pipe, "U" shaped pipe both ends are communicated with the air inlet pipe (8), the exhaust pipe (9) through the air hole (6) respectively, the U" shaped pipe middle part is contacted with the feeding channel (5) inner bottom wall and is parallel with the feeding channel (5) inclination direction, the adjacent preheating pipe (7) is left with the gap, the air hole (6) near the air exhaust fan (4) side is communicated with the air exhaust fan (4) air outlet end through the air inlet pipe (8), the feeding channel (5) other side air hole (6) is connected with the exhaust pipe (9).
2. The low-carbon cement clinker calcination heat energy utilization device according to claim 1, characterized in that: The U" shaped pipe middle part of the preheating pipe (7) is connected with the feeding channel (5) inner bottom wall through the metal support (10).
3. The low-carbon cement clinker calcination heat energy utilization device according to claim 1, characterized in that: The exhaust pipe (9) is communicated with the waste heat boiler.
4. The low-carbon cement clinker calcination heat energy utilization device according to claim 1, characterized in that: The air inlet pipe (8) has three branch pipes, three branch pipes are communicated with the air exhaust fan (4) air inlet end, air hole (6), anti-blocking air pipe (12) respectively, two branch pipes that are communicated with the air hole (6), anti-blocking air pipe (12) are respectively provided with solenoid valve (11) in, the anti-blocking air pipe (12) is parallelly arranged with the feeding channel (5), the anti-blocking air pipe (12) lower part is communicated with the feeding channel (5) top wall through a plurality of air outlet pipes (13), the air outlet pipe (13) can help the feeding channel (5) in conveying when air outlet.