Waste heat recovery pipeline of rotary kiln for ferrotitanium powder reduction
By designing variable diameter tapering and expanding pipe sections and spiral guide plates in the rotary kiln waste heat recovery pipeline, combined with a multi-layer insulation structure, the problems of insufficient flue gas flow velocity and heat loss were solved, achieving a highly efficient waste heat recovery effect.
Patent Information
- Application Number
- CN202520639719.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-08
AI Technical Summary
Insufficient flue gas flow velocity and material properties in existing rotary kiln waste heat recovery pipelines lead to heat loss and reduce waste heat recovery efficiency.
The waste heat recovery pipe body is designed with tapered and expanded sections along its long axis, combined with spirally arranged guide plates and multi-layer insulation structure to improve flue gas flow velocity and pipe sealing, thereby reducing heat loss.
By increasing the flue gas flow rate and enhancing the insulation performance of the pipeline, the waste heat recovery efficiency is significantly improved, meeting the waste heat recovery requirements of the rotary kiln used for titanium-iron powder reduction.
Smart Images
Figure CN223954663U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a waste heat recovery pipeline technical field more specifically, relate to a rotary kiln waste heat recovery pipeline for titanium iron powder reduction. BACKGROUND
[0002] Titanium iron powder reduction is an important industrial process. It takes titanium iron powder as raw material, in the specific high temperature and reducing gas environment, utilizes chemical reaction, removes oxygen in titanium iron oxide, makes titanium and iron element be reduced. The process can improve titanium iron purity, is widely used in metallurgy, aerospace and other fields, lays the foundation for high performance material preparation. Rotary kiln is the important production equipment of titanium iron powder reduction.
[0003] Rotary kiln usually sets up waste heat recovery pipeline to convey kiln high temperature flue gas to boiler or rotary kiln preheating position to carry out waste heat recovery during work. At present, when rotary kiln waste heat recovery pipeline transmits high temperature waste heat, due to the insufficient flow speed of flue gas in the pipeline and the pipeline material quality, heat loss is easily caused, and waste heat recovery efficiency is reduced. In view of this, we propose a rotary kiln waste heat recovery pipeline for titanium iron powder reduction. UTILITY MODEL CONTENT
[0004] The utility model discloses a rotary kiln waste heat recovery pipeline for titanium iron powder reduction to overcome the deficiency of prior art, adapt to the reality needs, to solve the current flue gas in the pipeline flow speed insufficient and the pipeline material quality reason, easily lead to heat loss, reduce the technical problem of waste heat recovery efficiency.
[0005] To solve the above technical problem, the utility model provides the following technical scheme: a rotary kiln waste heat recovery pipeline for titanium iron powder reduction, including waste heat recovery pipe body and the sealing connecting mechanism being arranged at the both ends of waste heat recovery pipe body, the waste heat recovery pipe body includes a plurality of reducing gradually tapered pipe sections and a plurality of reducing gradually expanded pipe sections, the waste heat recovery pipe body is sequentially arranged along the long axis direction reducing gradually tapered pipe section and reducing gradually expanded pipe section, the waste heat recovery pipe body is provided with the deflector, the waste heat recovery pipe body still includes working layer, first heat preservation layer, steel pipe layer, second heat preservation layer and protection layer, the sealing connecting mechanism includes the flange plate being arranged at the both ends of waste heat recovery pipe body, the mounting hole is formed in the flange plate, and the front end of the flange plate is provided with the sealing gasket.
[0006] Preferably, the deflector is spirally arranged along the long axis direction, the spiral axis of the deflector coincides with the central axis of the waste heat recovery pipe body, and the deflector is one complete spiral along 500mm-1000mm in the waste heat recovery pipe body.
[0007] Preferably, the deflector divides the waste heat recovery pipe body into a first flow channel and a second flow channel, and the first flow channel and the second flow channel are both single spiral channels.
[0008] Preferably, the front end of the flange plate is provided with a gasket groove, and the sealing gasket is located in the gasket groove, and the sealing gasket and the gasket groove are both provided in a spiral from the center to the outside.
[0009] Preferably, the steel pipe layer is located between the first heat preservation layer and the second heat preservation layer, the first heat preservation layer is an inner layer of the steel pipe layer, the inner layer of the first heat preservation layer is provided with a working layer, and the outer layer of the second heat preservation layer is provided with a protection layer.
[0010] Preferably, the first heat preservation layer and the second heat preservation layer are made of rock wool material, the working layer is a seamless steel pipe, and the protection layer is made of glass steel material.
[0011] Compared with the prior art, the utility model has the advantages that:
[0012] 1. The waste heat recovery pipe body and the guide plate structure are designed, the waste heat recovery pipe body is sequentially and circularly provided with a gradually tapered pipe section and a gradually expanded pipe section along the long axis direction, when the flue gas passes through the gradually tapered pipe section, the flue gas flow speed is accelerated according to the fluid continuity principle, and the combination of the gradually tapered pipe section and the gradually expanded pipe section utilizes the acceleration of the gradually tapered section and the flue gas momentum to improve the overall flue gas flow speed in the pipe, avoids the problem that the continuous tapering leads to an increase in resistance and affects the flow speed, the guide plate provided in a spiral separates the flue gas into the first flow channel and the second flow channel, the flue gas flows in a spiral shape, the flue gas is more uniformly distributed on the pipe cross section, the airflow is divided into two parts to reduce airflow turbulence and speed difference, the overall flow speed is limited due to uneven flow speed is avoided, the overall flue gas flow speed is further improved, the flue gas flow speed is improved, the waste heat recovery efficiency is effectively improved, the demand of the rotary kiln waste heat recovery for the reduction of ilmenite powder is better met, and the problems that the flue gas flow speed in the pipe is insufficient and the pipe material causes heat loss and reduces the waste heat recovery efficiency are solved.
[0013] 2. The first heat preservation layer and the second heat preservation layer are made of rock wool material, when the high-temperature flue gas flows in the waste heat recovery pipe body, heat transfer to the outside of the pipe is effectively prevented, heat loss in the waste heat recovery pipe body is effectively reduced, and the waste heat recovery efficiency is further improved.
[0014] 3. The sealing gasket structure is designed, the sealing gasket in the gasket groove at the front end of the flange plate is provided in a spiral, the sealing gasket provided in a spiral can increase the sealing area and range of the connection between the flanges, the sealing property of the connection is further improved, heat loss caused by flue gas leakage is prevented, and the waste heat recovery efficiency is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1It is the front view structural schematic diagram of the utility model;
[0016] Figure 2 It is the section view structural schematic diagram of the utility model;
[0017] Figure 3 It is the sealing connecting mechanism structural schematic diagram of the utility model;
[0018] Figure 4 It is the guide plate structural schematic diagram of the utility model;
[0019] Figure 5 It is the pipeline section structure schematic diagram of the utility model.
[0020] Mark explanation in drawing: 101, waste heat recovery pipe body;102, reducing gradually tapered pipe section;103, reducing gradually expanded pipe section;104, guide plate;105, first flow channel;106, second flow channel;107, working layer;108, first heat preservation layer;109, steel pipe layer;110, second heat preservation layer;111, protection layer;200, sealing connecting mechanism;201, flange plate;202, gasket groove;203, sealing gasket. Specific implementation
[0021] As Figures 1 to 5 shown, the utility model relates to a kind of rotary kiln waste heat recovery pipeline for ilmenite powder reduction, including waste heat recovery pipe body 101 and the sealing connecting mechanism 200 being set at the both ends of waste heat recovery pipe body 101, waste heat recovery pipe body 101 includes several reducing gradually tapered pipe sections 102 and several reducing gradually expanded pipe sections 103, waste heat recovery pipe body 101 is sequentially arranged in cycle along long axis direction reducing gradually tapered pipe section 102 and reducing gradually expanded pipe section 103, guide plate 104 is provided in waste heat recovery pipe body 101, waste heat recovery pipe body 101 also includes working layer 107, first heat preservation layer 108, steel pipe layer 109, second heat preservation layer 110 and protection layer 111, sealing connecting mechanism 200 includes the flange plate 201 being set at the both ends of waste heat recovery pipe body 101, mounting hole is formed on flange plate 201, the front end of flange plate 201 is provided with sealing gasket 203.The utility model accelerates high-temperature flue gas flow rate and improves pipeline heat insulation and sealing performance, effectively prevent heat loss in pipeline, can effectively improve waste heat recovery efficiency, better meet the demand of rotary kiln waste heat recovery for ilmenite powder reduction.
[0022] Specifically, the guide plate 104 is spirally arranged along the long axis direction, the spiral axis of the guide plate 104 coincides with the center axis of the waste heat recovery pipe body 101, and the guide plate 104 is a complete spiral along 500mm-1000mm in the waste heat recovery pipe body 101. The guide plate 104 arranged in a spiral separates the flue gas into the first flow channel 105 and the second flow channel 106, so that the flue gas flows in a spiral shape, the flue gas is more evenly distributed on the cross section of the pipeline, the speed difference is reduced, the overall flow rate is limited due to uneven flow rate is avoided, and the overall flow rate of the flue gas is further improved.
[0023] Further, the guide plate 104 divides the waste heat recovery pipe body 101 into the first flow channel 105 and the second flow channel 106, and the first flow channel 105 and the second flow channel 106 are both single spiral channels. The spiral arrangement of the first flow channel 105 and the second flow channel 106 can improve the flue gas flow rate, and the entering flue gas can be effectively reduced.
[0024] It is worth noting that the front end of the flange plate 201 is provided with a gasket groove 202, and the sealing gasket 203 is located in the gasket groove 202, and the sealing gasket 203 and the gasket groove 202 are both spirally arranged from the center to the outside. The spiral arrangement of the sealing gasket 203 can increase the sealing area and range of the connection between the flanges, further improve the sealing performance of the connection, and prevent heat loss caused by flue gas leakage.
[0025] It is worth mentioning that the steel pipe layer 109 is located between the first heat preservation layer 108 and the second heat preservation layer 110, the first heat preservation layer 108 is located in the inner layer of the steel pipe layer 109, the working layer 107 is arranged in the inner layer of the first heat preservation layer 108, and the outer layer of the second heat preservation layer 110 is provided with a protection layer 111. The protection layer 111 is made of glass steel material, has the characteristics of waterproof, moisture-proof and wear-resistant, protects the internal heat preservation layer and the steel pipe layer 109 from being eroded by the external environment, and reduces the heat loss as a whole.
[0026] It is worth noting that the first heat preservation layer 108 and the second heat preservation layer 110 are made of rock wool material, the working layer 107 is a seamless steel pipe, and the protection layer 111 is made of glass steel material. The first heat preservation layer 108 and the second heat preservation layer 110 are made of rock wool material, which can effectively prevent heat transfer to the outside of the pipeline when high-temperature flue gas flows in the waste heat recovery pipe body 101, can effectively reduce the heat loss in the waste heat recovery pipe body 101, and can improve the waste heat recovery efficiency.
[0027] Working principle: the embodiment provides a rotary kiln waste heat recovery pipeline for titanium-iron powder reduction, when in use, the waste heat recovery pipe body 101 is connected with the rotary kiln and the boiler through the flange plate 201, the sealing gasket 203 arranged in the spiral mode can guarantee the sealing performance of the two ends of the pipeline, prevents heat loss from the connection, the high-temperature flue gas from the rotary kiln enters from the beginning end of the waste heat recovery pipe body 101, since the gradually reducing pipe section 102 and the gradually expanding pipe section 103 are arranged in the rotary kiln waste heat recovery pipeline for titanium-iron powder reduction, when the flue gas passes through the gradually reducing pipe section 102, the inner diameter of the pipeline gradually reduces, according to the fluid continuity principle, the flue gas flow rate will accelerate, when the flue gas enters the gradually expanding pipe section 103 from the gradually reducing pipe section 102, although the flow rate will decrease in the gradually expanding section, since the gradually reducing section makes the flue gas obtain a higher initial speed, and the flue gas accelerated after passing through the gradually reducing section has a larger momentum, so that the flue gas can continuously utilize the acceleration effect of the gradually reducing section after passing through a plurality of gradually reducing and gradually expanding pipe section combinations, thereby improving the flow rate of the flue gas in the pipeline, preventing the problem that the continuous gradually reducing pipe section causes the resistance to increase and affects the flow rate, and the flue gas entering the pipeline is separated into the first flow channel 105 and the second flow channel 106 under the action of the guide plate 104, the spiral guide plate 104 can guide the flue gas to form a spiral flow path in the pipeline, the spiral flow makes the distribution of the flue gas on the cross section of the pipeline more uniform, reduces the speed difference of the flue gas at the center and the edge of the pipeline, avoids the problem that the overall flow rate is limited due to the uneven flow rate, thereby improving the overall flow rate of the flue gas, the structure of the waste heat recovery pipe body 101 also helps to reduce heat loss, the working layer 107 is made of seamless steel pipe and has good high-temperature resistance and corrosion resistance, can directly contact the high-temperature flue gas, the first heat preservation layer 108 and the second heat preservation layer 110 are made of rock wool material, the rock wool is a high-quality heat preservation material and can effectively prevent heat from being transmitted to the outside of the pipeline, the steel pipe layer 109 plays a supporting role and guarantees the stability of the pipeline structure, the protection layer 111 is made of glass steel material and has the characteristics of waterproofness, moisture resistance and wear resistance, can protect the heat preservation layer and the steel pipe layer 109 inside from being eroded by the external environment, so that the high-temperature flue gas not only has a faster flow rate in the waste heat recovery pipeline, but also can be effectively heat-insulated, prevents heat loss, and can effectively improve the waste heat recovery efficiency, better meets the waste heat recovery requirement of the rotary kiln for titanium-iron powder reduction.
[0028] The embodiment of the utility model discloses is better embodiment, but not limited to this, the ordinary skill of the art, easily according to the above-mentioned embodiment, the spirit of the utility model is appreciated, and different is drawn and changes, but as long as not departing from the spirit of the utility model, all are within the protection scope of the utility model.
Claims
1. A rotary kiln waste heat recovery duct for reduction of titanium-iron powder, characterized by, The application relates to a waste heat recovery pipe body (101) and a sealing connecting mechanism (200) arranged at both ends of the waste heat recovery pipe body (101), wherein the waste heat recovery pipe body (101) comprises a plurality of variable-diameter conical pipe sections (102) and a plurality of variable-diameter conical pipe sections (103), the variable-diameter conical pipe sections (102) and the variable-diameter conical pipe sections (103) are arranged in sequence in the long axis direction, a flow guide plate (104) is arranged in the waste heat recovery pipe body (101), the waste heat recovery pipe body (101) further comprises a working layer (107), a first heat preservation layer (108), a steel pipe layer (109), a second heat preservation layer (110) and a protection layer (111), the sealing connecting mechanism (200) comprises flanges (201) arranged at both ends of the waste heat recovery pipe body (101), mounting holes are formed in the flanges (201), and sealing gaskets (203) are arranged at the front ends of the flanges (201).
2. A rotary kiln waste heat recovery duct for reduction of ferrotitanium powder according to claim 1, characterized in that, The flow guide plate (104) is spirally arranged along the long axis direction, the spiral axis of the flow guide plate (104) coincides with the central axis of the waste heat recovery pipe body (101), and the flow guide plate (104) is one complete spiral along 500mm-1000mm in the waste heat recovery pipe body (101).
3. A rotary kiln waste heat recovery duct for reduction of ferrotitanium powder according to claim 2, characterized in that, The flow guide plate (104) divides the waste heat recovery pipe body (101) into a first flow channel (105) and a second flow channel (106), and the first flow channel (105) and the second flow channel (106) are both single spiral channels.
4. A rotary kiln waste heat recovery duct for reduction of ferrotitanium powder according to claim 3, characterized in that, The front end of the flange (201) is provided with a gasket groove (202), the sealing gasket (203) is arranged in the gasket groove (202), and the sealing gasket (203) and the gasket groove (202) are both spirally arranged from the center to the outside.
5. A rotary kiln waste heat recovery duct for reduction of ferrotitanium powder according to claim 4, characterized in that, The steel pipe layer (109) is arranged between the first heat preservation layer (108) and the second heat preservation layer (110), the first heat preservation layer (108) is arranged in the inner layer of the steel pipe layer (109), the working layer (107) is arranged in the inner layer of the first heat preservation layer (108), and the protection layer (111) is arranged in the outer layer of the second heat preservation layer (110).
6. A rotary kiln waste heat recovery duct for reduction of ferrotitanium powder according to claim 5, characterized in that, The first heat preservation layer (108) and the second heat preservation layer (110) are made of rock wool material, the working layer (107) is a seamless steel pipe, and the protection layer (111) is made of glass steel material.