Trolley fan cover sealing system for lump ore drying
By employing a multi-layer composite sealing mechanism consisting of an inner metal plate layer, an outer insulation cotton layer, and an elastic sealing layer in the lump ore drying equipment, the problem of unstable sealing at high temperatures is solved, achieving a highly efficient and reliable sealing effect and reducing energy consumption and maintenance costs.
Patent Information
- Application Number
- CN202422492400.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-15
AI Technical Summary
In the existing lump ore drying process, the existing under-carriage seal cannot maintain a stable seal for a long time under high temperature and hot air conditions, resulting in a high air leakage rate, which affects the drying effect and increases energy consumption.
It adopts a multi-layer composite sealing mechanism with an inner high-temperature resistant metal plate layer and an outer thermal insulation cotton layer, combined with an elastic sealing layer, to form a high-temperature resistant and reliable sealing system that can adapt to hot air conditions of around 300℃.
It effectively reduces air leakage rate, improves drying effect, reduces dryer fan energy consumption, and has a simple structure, convenient installation and maintenance, and long service life.
Smart Images
Figure CN223525525U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lump ore drying equipment, concretely relates to a trolley wind cover sealing system for lump ore drying belongs to lump ore drying technical field. BACKGROUND
[0002] At present, the furnace charging lump ore is generally high in viscosity and high in powder content, especially the overseas imported lump ore, the moisture content of which is about 6%, and the powder content is as high as more than 20%. Due to the water transportation of the material, the long distance of transportation, the multiple logistics links, the open-air storage in the turnover process, the increased damage in the unloading and loading, and other reasons, the powder content of the lump ore is even as high as more than 30%. At the same time, the increase of the water content of the lump ore causes a large amount of powder to adhere to the surface of the lump ore, and the screen plate of the vibrating screen is often blocked during screening, so that the screening effect cannot be achieved, and the powder adhering to the surface of the lump ore finally enters the blast furnace, which affects the air permeability of the blast furnace, not only increases the smelting cost of the blast furnace, but also affects the stable and smooth operation of the blast furnace. Therefore, the reduction of the moisture content of the lump ore has important significance for reducing the ironmaking cost and enhancing the stability of the furnace condition.
[0003] Therefore, many steel enterprises begin to increase the lump ore drying system, and the lump ore drying process is to dry the lump ore first, the moisture content before drying is 6% to 7%, and the moisture content after drying is 2% to 3%, and then screening is carried out. The advantages of this process method are that the drying effect is obvious, the powder content of the furnace charging lump ore can be effectively reduced, and the smelting cost of the blast furnace is reduced. Generally, in order to improve the drying efficiency, hot air at about 300 DEG C needs to be used as the drying air, the sealing performance of the upper cover of the air box under the lifting trolley is improved, the air leakage rate is reduced, the drying effect can be effectively improved, and the energy consumption of the dryer is reduced. However, in the prior art, if water sealing is used, the water will be quickly evaporated by the high-temperature air, which will cause failure, frequent water addition is needed, and a large amount of water vapor will be generated; if rubber sealing is used, the rubber plate will be easily aged and damaged under long-term high-temperature working condition, which will cause failure; if mechanical sealing is used, the spring for automatic compensation and the resin for sealing in the mechanical sealing cannot work at high temperature. SUMMARY
[0004] In view of the problem that the existing trolley lower sealing cannot improve the long-term stable sealing effect in the high-temperature hot air environment in the existing lump ore drying process, the utility model provides a trolley wind cover sealing system for lump ore drying, a multilayer composite sealing mechanism with an inner side high-temperature resistant metal plate layer and an outer side heat preservation cotton layer is arranged on the lower side of the trolley, the multilayer composite sealing mechanism can adapt to the high-temperature (about 300 DEG C) hot air working condition required by the lump ore drying, can work stably and reliably for a long time, can effectively reduce the air leakage rate, can improve the drying effect, and can further reduce the energy consumption of the dryer fan.
[0005] In order to achieve the above technical purpose, the technical scheme adopted by the utility model is as follows:
[0006] The invention discloses a kind of block ore drying with trolley wind cover sealing system, the system includes trolley walking frame beam, wind box upper cover and multilayer composite sealing mechanism.A pair of trolley walking frame beams is arranged in parallel on the both sides of trolley.Wind box upper cover is arranged below trolley walking frame beam.Multilayer composite sealing mechanism is arranged between trolley walking frame beam and wind box upper cover.Multilayer composite sealing mechanism includes inner metal plate layer and outer thermal cotton layer.
[0007] As preferred, the metal plate layer is aluminum plate with thickness not less than 5mm.
[0008] As preferred, the thickness of aluminum plate is 5-10mm, preferably 6-8mm.
[0009] As preferred, the thermal cotton layer is aluminum silicate thermal cotton with thickness not less than 120mm.
[0010] As preferred, the thickness of aluminum silicate thermal cotton is 120-150mm, preferably 125-145mm.
[0011] As preferred, the multilayer composite sealing mechanism further includes elastic sealing layer.Elastic sealing layer is arranged outside thermal cotton layer.
[0012] As preferred, the elastic sealing layer is sealing plastic or sealing rubber with thickness not less than 50mm.
[0013] As preferred, the elastic sealing layer is polytetrafluoroethylene layer wrapped with spring.
[0014] As preferred, along the running direction of trolley, multilayer composite sealing mechanism includes multiple independent sealing segments, and the length of single sealing segment is not less than 1m (for example, 1m, 1.2m, 1.5m, 1.8m, 2m, 2.5m, 3m, 3.5m, 4m, 5m, 6m, 7m, 8m, 9m, 10m, etc.). Preferably, the connection mode between sealing segments is that each layer of adjacent sealing segments is first overlapped in turn and then connected by detachable bolt or clamp.
[0015] As preferred, sealing support platform is further arranged outside the top end of wind box upper cover.Multilayer composite sealing mechanism is arranged on sealing support platform and located below trolley walking frame beam.Sealing support platform is formed by horizontal extension of the top end of wind box upper cover to outside or is separately connected water platform plate.
[0016] In the prior art, the hot air required for block ore drying is generally at 300 DEG C, and the wet block ore in the pallet is dried by air extraction after the hot air passes through the pallet grate from bottom to top. In order to reduce the air leakage rate and thus ensure the drying effect, a sealing mechanism needs to be provided on the top of the air box on the lower side of the pallet. The common air sealing mechanisms include water sealing, rubber sealing and mechanical sealing, but since the hot air working condition temperature of the block ore drying is relatively high, the above air sealing mechanisms cannot provide long-term reliable and effective sealing. In view of the deficiencies of the prior art, the utility model discloses a multilayer composite sealing mechanism with an inner side high-temperature-resistant metal plate layer and an outer side heat preservation cotton layer arranged on the lower side of the pallet, which can adapt to the high-temperature (about 300 DEG C) hot air working condition required for block ore drying, can work stably and reliably for a long time, can effectively reduce the air leakage rate, can improve the drying effect, and thus can reduce the energy consumption of the dryer fan.
[0017] In the utility model, the inner side metal plate layer of the multilayer composite sealing mechanism is an aluminum plate layer, which is arranged at the innermost side and directly contacts the hot air. The aluminum plate layer has low relative hardness and high toughness, can adapt to the unevenness of the bottom surface of the pallet running frame beam (generally a rotary frame, i.e. a track beam for pallet running), can also adapt to the 300 DEG C ambient temperature, has a long service life and has certain heat insulation performance.
[0018] In the utility model, in order to further improve the sealing effect, an elastic sealing layer (for example, a polytetrafluoroethylene layer wrapped with a spring) is further arranged on the outer side of the heat preservation cotton layer. After the double heat insulation and sealing effects of the metal plate layer and the heat preservation cotton layer, the temperature of the outermost side is significantly reduced. At this time, the elastic sealing layer with better sealing performance is further adopted, which can significantly improve the air tightness of the sealing mechanism and is not affected by high temperature, has the characteristics of long-term high air tightness.
[0019] In the utility model, the multilayer composite sealing mechanism includes a plurality of independent sealing segments, i.e. the multilayer composite sealing mechanism is composed of a plurality of assembly type sealing segments connected in series. By designing the multilayer composite sealing mechanism as the assembly type series sealing segments which can be quickly installed and disassembled, on the one hand, the construction and installation efficiency can be improved, and on the other hand, the maintenance and replacement are facilitated, and the maintenance and replacement cost is reduced.
[0020] In the utility model, a sealing support platform is further arranged on the outer side of the top end of the air box cover. The sealing support platform is a water platform plate which is horizontally extended outward from the top end of the air box cover or is a separately connected water platform plate. Through the arrangement of the sealing support platform, long-term stable support can be provided for the multilayer composite sealing mechanism, and convenience is also provided for the replacement and maintenance of the multilayer composite sealing mechanism in the later period.
[0021] Compared with the prior art, the beneficial technical effects of the utility model are as follows:
[0022] 1: The system of the utility model sets up multilayer composite sealing mechanism with inner side high temperature resistant metal plate layer and outer side heat preservation cotton layer on the lower side of the trolley, the multilayer composite sealing mechanism can adapt to the high temperature (about 300 DEG C) hot air working condition required by lump ore drying, compared with the existing water seal, rubber seal and the like, can long-term stable and reliable work, effectively reduces the air leakage rate, improves the drying effect, and further reduces the energy consumption of the dryer fan.
[0023] 2: The system of the utility model also has the advantages of simple structure, convenient installation and maintenance, strong practicality, long service life and the like. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a structural diagram of the existing water sealing mechanism.
[0025] Figure 2 It is a structural diagram of the sealing system of the utility model.
[0026] Figure 3 It is a partial enlarged diagram of the multilayer composite sealing mechanism of the utility model when it is a double-layer structure.
[0027] Figure 4 It is a partial enlarged diagram of the multilayer composite sealing mechanism of the utility model when it is a three-layer structure.
[0028] Mark: 1: trolley walking frame beam; 2: air bellow upper cover; 3: multilayer composite sealing mechanism; 301: metal plate layer; 302: heat preservation cotton layer; 303: elastic sealing layer; 4: trolley; 5: sealing support platform. DETAILED DESCRIPTION
[0029] The technical scheme of the utility model will be illustrated below, and the scope of protection requested by the utility model includes but is not limited to the following embodiments.
[0030] A trolley air bellow sealing system for lump ore drying, the system includes trolley walking frame beam 1, air bellow upper cover 2 and multilayer composite sealing mechanism 3. A pair of trolley walking frame beams 1 is arranged in parallel on both sides of the trolley 4. The air bellow upper cover 2 is arranged below the trolley walking frame beam 1. The multilayer composite sealing mechanism 3 is arranged between the trolley walking frame beam 1 and the air bellow upper cover 2. The multilayer composite sealing mechanism 3 includes inner side metal plate layer 301 and outer side heat preservation cotton layer 302.
[0031] As preferred, the metal plate layer 301 is an aluminum plate with a thickness not less than 5 mm.
[0032] As preferred, the thickness of the aluminum plate is 5-10 mm, preferably 6-8 mm.
[0033] Preferably, the insulation layer 302 is aluminum silicate insulation cotton with a thickness of not less than 120 mm.
[0034] Preferably, the thickness of the aluminum silicate insulation cotton is 120~150mm, and more preferably 125~145mm.
[0035] Preferably, the multi-layer composite sealing mechanism 3 further includes an elastic sealing layer 303. The elastic sealing layer 303 is disposed on the outside of the thermal insulation layer 302.
[0036] Preferably, the elastic sealing layer 303 is a sealing plastic or sealing rubber with a thickness of not less than 50 mm.
[0037] Preferably, the elastic sealing layer 303 is a polytetrafluoroethylene layer that wraps around a spring.
[0038] Preferably, along the running direction of the trolley 4, the multi-layer composite sealing mechanism 3 includes multiple independent sealing segments, each with a length of not less than 1m. Preferably, the sealing segments are connected by first sequentially overlapping the layers of adjacent sealing segments and then connecting them using detachable bolts or clamps.
[0039] Preferably, a sealing support platform 5 is also provided on the outer side of the top of the bellows cover 2. The multi-layer composite sealing mechanism 3 is set on the sealing support platform 5 and located on the lower side of the trolley traveling frame beam 1. The sealing support platform 5 is formed by the top of the bellows cover 2 extending horizontally outward to form a horizontal platform plate or is a separate externally connected horizontal platform plate. Example 1
[0040] like Figures 2-4 As shown, a trolley-type air hood sealing system for drying lump ore includes a trolley traveling frame beam 1, an air box cover 2, and a multi-layer composite sealing mechanism 3. A pair of trolley traveling frame beams 1 are arranged parallel to each other on both sides of the trolley 4. An air box cover 2 is installed below each of the trolley traveling frame beams 1. The multi-layer composite sealing mechanism 3 is located between the trolley traveling frame beams 1 and the air box cover 2. The multi-layer composite sealing mechanism 3 includes an inner metal plate layer 301 and an outer insulation cotton layer 302. Example 2
[0041] Repeat Example 1, except that the metal plate layer 301 is an aluminum plate with a thickness of not less than 5 mm. Example 3
[0042] Repeat Example 2, except that the thickness of the aluminum plate is 6mm. Example 4
[0043] Example 3 is repeated, except that the thermal insulation cotton layer 302 is aluminum silicate thermal insulation cotton with a thickness of no less than 120 mm. Example 5
[0044] Example 4 is repeated, except that the thickness of the aluminum silicate thermal insulation cotton is 130 mm. Example 6
[0045] Example 5 is repeated, except that the multi-layer composite sealing mechanism 3 further comprises an elastic sealing layer 303. The elastic sealing layer 303 is arranged on the outer side of the thermal insulation cotton layer 302. Example 7
[0046] Example 6 is repeated, except that the elastic sealing layer 303 is sealing plastic with a thickness of no less than 50 mm. Example 8
[0047] Example 7 is repeated, except that the elastic sealing layer 303 is a polytetrafluoroethylene layer wrapped with a spring. Example 9
[0048] Example 8 is repeated, except that along the running direction of the trolley 4, the multi-layer composite sealing mechanism 3 comprises a plurality of independent sealing segments, and the length of a single sealing segment is 1.5 m. Example 10
[0049] Example 9 is repeated, except that the connection mode between the sealing segments is that the layers of adjacent sealing segments are first alternately overlapped in sequence and then connected by detachable bolts. Example 11
[0050] Example 10 is repeated, except that a sealing support platform 5 is further arranged on the outer side of the top end of the bellows upper cover 2. The multi-layer composite sealing mechanism 3 is arranged on the sealing support platform 5 and located on the lower side of the trolley running frame beam 1. The sealing support platform 5 is formed by horizontally extending the top end of the bellows upper cover 2 outward. Example 12
[0051] Example 11 is repeated, except that the sealing support platform 5 is a separately connected water platform plate.
Claims
1. A bogie hood sealing system for use in the drying of lump ore, characterised in that: The system comprises a trolley walking frame beam (1), a wind box upper cover (2) and a multi-layer composite sealing mechanism (3); a pair of trolley walking frame beams (1) are arranged in parallel on both sides of a trolley (4); a wind box upper cover (2) is arranged below each trolley walking frame beam (1); the multi-layer composite sealing mechanism (3) is arranged between the trolley walking frame beam (1) and the wind box upper cover (2); the multi-layer composite sealing mechanism (3) comprises an inner metal plate layer (301) and an outer thermal insulation cotton layer (302).
2. The system of claim 1, wherein: The metal plate layer (301) is an aluminum plate with a thickness not less than 5 mm.
3. The system of claim 2, wherein: The thickness of the aluminum plate is 5-10 mm.
4. The system of claim 3, wherein: The thickness of the aluminum plate is 6-8 mm.
5. The system of claim 1, wherein: The thermal insulation cotton layer (302) is aluminum silicate thermal insulation cotton with a thickness not less than 120 mm.
6. The system of claim 5, wherein: The thickness of the aluminum silicate thermal insulation cotton is 120-150 mm.
7. The system of claim 6, wherein: The thickness of the aluminum silicate thermal insulation cotton is 125-145 mm.
8. The system of claim 1, wherein: The multi-layer composite sealing mechanism (3) further comprises an elastic sealing layer (303); the elastic sealing layer (303) is arranged on the outer side of the thermal insulation cotton layer (302).
9. The system of claim 8, wherein: The elastic sealing layer (303) is sealing plastic or sealing rubber with a thickness not less than 50 mm.
10. The system of claim 8, wherein: The elastic sealing layer (303) is a polytetrafluoroethylene layer wrapped with a spring.
11. The system of any one of claims 1-10, wherein: Along the running direction of the trolley (4), the multi-layer composite sealing mechanism (3) comprises a plurality of independent sealing segments, and the length of a single sealing segment is not less than 1 m.
12. The system of claim 11, wherein: The connection mode between the sealing segments is that the layers of adjacent sealing segments are first alternately overlapped and then connected by detachable bolts or clamps.
13. The system of any one of claims 1-10, 12, wherein: A sealing support platform (5) is further arranged on the outer side of the top end of the wind box upper cover (2); the multi-layer composite sealing mechanism (3) is arranged on the sealing support platform (5) and located below the trolley walking frame beam (1); the sealing support platform (5) is a water platform plate formed by horizontally extending the top end of the wind box upper cover (2) outward or separately connected.
14. The system of claim 11, wherein: A sealing support platform (5) is further arranged on the outer side of the top end of the wind box upper cover (2); the multi-layer composite sealing mechanism (3) is arranged on the sealing support platform (5) and located below the trolley walking frame beam (1); the sealing support platform (5) is a water platform plate formed by horizontally extending the top end of the wind box upper cover (2) outward or separately connected.