Energy-saving tuyere small sleeve
By setting a cylindrical insulation layer on the inner wall of the hot air passage of the blast furnace air outlet, the problem of easy damage and energy consumption of small air outlets is solved, and the effect of energy saving and extended service life is achieved.
Patent Information
- Application Number
- CN202420798757.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The small sleeve of the blast furnace air outlet is easily damaged, resulting in early scrapping and greatly affecting the economic indicators of the blast furnace operation.
A cylindrical heat insulation layer is provided on the inner wall of the hot air passage of the small sleeve of the air outlet. The first annular weld and the second annular weld are placed outside the cylindrical heat insulation layer to avoid erosion of coal powder and use high-temperature resistant ceramics or high-temperature glue materials to form the partition. Thermal layer.
Effective energy saving, extend the service life of the small air vent sleeve, and avoid weld wear and early scrapping.
Smart Images
Figure CN222205291U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to cooling equipment for an air supply system of an iron-making blast furnace, in particular to an energy-saving air inlet small sleeve. Background Art
[0002] The tuyere sleeve of a blast furnace is the most easily damaged component in the air supply system of an ironmaking blast furnace. Since the front end of the tuyere sleeve needs to extend into the furnace, it is easily melted by the high temperature in the furnace, and is also easily worn by metal droplets and coke circulation. Therefore, the working environment of the tuyere sleeve of a blast furnace is very harsh, so it is necessary to continuously pass cooling water into the tuyere sleeve to cool the tuyere sleeve. However, when the tuyere sleeve transports hot air to the blast furnace, the hot air input into the blast furnace enters the blast furnace through the hot air channel of the tuyere sleeve. Since the inner sleeve of the tuyere sleeve has excellent thermal conductivity, the temperature of the hot air decreases after passing through the tuyere sleeve, which makes the tuyere sleeve consume more energy, thereby affecting the economic indicators of blast furnace operation.
[0003] Moreover, the current tuyere sleeve includes a flange, an inner sleeve, an outer sleeve and a deflector. The outer sleeve is arranged outside the inner sleeve, the rear end of the outer sleeve outer wall is fixedly connected to the front end of the outer sleeve outer wall, the rear end of the inner sleeve inner wall is connected to the front end of the inner sleeve through a first annular weld, and the rear end of the inner sleeve is connected to the front end of the inner wall of the flange through a second annular weld; the outer sleeve, the inner sleeve and the flange form an internal cavity, and the deflector is arranged in the internal cavity; the flange is provided with a water inlet and a water outlet; the tuyere sleeve has a hot air channel running forward and backward (the hot air channel is surrounded by the inner side surface of the inner wall of the outer sleeve, the inner side surface of the inner sleeve and the inner side surface of the inner wall of the flange). The above-mentioned first annular weld and the second annular weld are both on the inner side surface of the hot air channel. When the high-speed flowing coal powder is blown sideways, it directly contacts the inner side surface of the hot air channel, which accelerates the wear of the first annular weld and the second annular weld. When the tuyere sleeve has not reached its service life, the first annular weld and the second annular weld are cracked and leaked mainly due to wear, resulting in the early scrapping of the tuyere sleeve. Utility Model Content
[0004] The problem to be solved by the utility model is to provide an energy-saving tuyere sleeve, which can not only save energy but also prevent coal powder from washing into the annular weld, thereby extending the service life.
[0005] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:
[0006] A small energy-saving air vent sleeve comprises a flange, an inner sleeve, an outer sleeve and a deflector, wherein the outer sleeve is arranged on the outside of the inner sleeve, the rear end of the outer wall of the outer sleeve is fixedly connected to the front end of the outer wall of the flange, the rear end of the inner wall of the outer sleeve is connected to the front end of the inner sleeve through a first annular weld, and the rear end of the inner sleeve is connected to the front end of the inner wall of the flange through a second annular weld; the outer sleeve, the inner sleeve and the flange form an internal cavity, and the deflector is arranged in the internal cavity; the flange is provided with a water inlet and a water outlet; the small air vent sleeve has a hot air channel running forward and backward, and is characterized in that: a cylindrical heat insulation layer is provided on the inner wall of the hot air channel, and the first annular weld and the second annular weld are both located on the outside of the cylindrical heat insulation layer and covered by the cylindrical heat insulation layer.
[0007] The definition of inside and outside mentioned above is: based on the hot air channel of the tuyere sleeve, the side close to the hot air channel is the inside, and the side away from the hot air channel is the outside.
[0008] In the above structure, the cylindrical insulation layer is arranged on the inner wall of the hot air channel. The cylindrical insulation layer can ensure the thermal insulation effect of the hot air channel, reduce the heat loss when the hot air passes through the hot air channel, and play a good energy-saving role; and the first annular weld and the second annular weld are hidden on the outside of the cylindrical insulation layer. Even if the coal injection pipe is blown off the side, the high-speed flowing coal powder only directly contacts the inner side surface of the cylindrical insulation layer, and the first annular weld and the second annular weld are blocked by the cylindrical insulation layer. The high-speed flowing coal powder cannot directly contact the first annular weld and the second annular weld, which can prevent the coal powder from scouring the first annular weld and the second annular weld, and will not cause wear in the area where the first annular weld and the second annular weld are located, thereby extending the service life of the air outlet sleeve.
[0009] In a preferred embodiment, the cylindrical heat insulation layer is a sleeve that is small in front and large in the back, and the outer side of the sleeve is in close contact with the inner wall of the hot air channel. In a more preferred embodiment, the outer side of the sleeve is bonded to the inner wall of the hot air channel by a high temperature resistant adhesive. The high temperature resistant adhesive can be a high temperature adhesive of model Mesgoton 3.1, which is heat resistant to 1280°C and is used for repairing and filling cracks in high temperature places such as fireplaces, boilers and chimneys, and sealing high temperature pipes.
[0010] In a further preferred embodiment, the sleeve is made of high temperature resistant ceramics. The high temperature resistant ceramics may be oxide ceramics (such as aluminum oxide ceramics), nitride ceramics (silicon nitride ceramics) or carbide ceramics (such as silicon carbide ceramics). The high temperature resistant ceramics may also be silicon nitride combined with silicon carbide materials.
[0011] In a further preferred embodiment, the thickness of the cylindrical heat insulation layer is 2 mm-12 mm.
[0012] In another preferred embodiment, a front annular recess is provided on the inner side surface of the rear section of the inner wall of the outer sleeve, and the front annular recess is located on the front side of the first annular weld; a rear annular recess is provided on the inner side surface of the front section of the inner wall of the flange, and the rear annular recess is located on the rear side of the second annular weld; the inner wall of the front annular recess, the inner side surface of the inner sleeve and the inner wall of the rear annular recess together form an annular groove with the notch facing inward, the first annular weld and the second annular weld are both located on the bottom of the annular groove, and the cylindrical thermal insulation layer is located in the annular groove.
[0013] In a further preferred embodiment, the cylindrical heat insulation layer is formed by self-flowing castable (self-flowing castable is a castable refractory material that can flow and degas without vibration). Usually, the self-flowing castable is poured into the annular groove and solidifies to form the cylindrical heat insulation layer.
[0014] In a preferred embodiment, the rear end of the outer wall of the sleeve is connected to the front end of the outer wall of the flange through a third annular weld.
[0015] Compared with the prior art, the utility model has the following advantages:
[0016] The utility model can not only ensure the heat preservation effect of the hot air channel, so that the heat loss is small when the hot air passes through the hot air channel, and has a good energy-saving effect, but also can prevent coal powder from scouring the first annular weld and the second annular weld, and will not cause wear in the areas where the first annular weld and the second annular weld are located, thereby extending the service life of the tuyere sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0018] Figure 2 It is a structural schematic diagram of embodiment 2 of the present utility model. DETAILED DESCRIPTION
[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] Example 1
[0021] like Figure 1As shown, the energy-saving air outlet sleeve in this embodiment includes a flange 1, an inner sleeve 2, an outer sleeve 3 and a deflector 4. The outer sleeve 3 is arranged on the outside of the inner sleeve 2, the rear end of the outer wall of the outer sleeve 3 is fixedly connected to the front end of the outer wall of the flange 1, the rear end of the inner wall of the outer sleeve 3 is connected to the front end of the inner sleeve 2 through a first annular weld 5, and the rear end of the inner sleeve 2 is connected to the front end of the inner wall of the flange 1 through a second annular weld 6; the outer sleeve 3, the inner sleeve 2 and the flange 1 form an internal cavity 7, and the deflector 4 is arranged in the internal cavity 7; the flange 1 is provided with a water inlet 11 and a water outlet (not shown in the figure); the air outlet sleeve has a hot air channel 8 running forward and backward, and a cylindrical heat insulation layer 9 is provided on the inner wall of the hot air channel 8, and the first annular weld 5 and the second annular weld 6 are both on the outside of the cylindrical heat insulation layer 9 and covered by the cylindrical heat insulation layer 9.
[0022] The definition of the above-mentioned inside and outside is: based on the hot air channel 8 of the tuyere sleeve, the side close to the hot air channel 8 is the inside, and the side away from the hot air channel 8 is the outside.
[0023] In the above structure, the cylindrical insulation layer 9 is arranged on the inner wall of the hot air channel 8. The cylindrical insulation layer 9 can ensure the thermal insulation effect of the hot air channel 8, so that the heat loss of the hot air is small when the hot air passes through the hot air channel 8, which plays a good energy-saving role; and the first annular weld 5 and the second annular weld 6 are hidden on the outside of the cylindrical insulation layer 9. Even if the coal injection pipe is blown off, the high-speed flowing coal powder is only in direct contact with the inner side of the cylindrical insulation layer 9, and the first annular weld 5 and the second annular weld 6 are blocked by the cylindrical insulation layer 9. The high-speed flowing coal powder cannot be in direct contact with the first annular weld 5 and the second annular weld 6, which can prevent the coal powder from scouring the first annular weld 5 and the second annular weld 6, and will not cause wear in the area where the first annular weld 5 and the second annular weld 6 are located, thereby extending the service life of the air inlet sleeve.
[0024] The cylindrical heat-insulating layer 9 is a sleeve that is smaller in the front and larger in the back, and the outer side of the sleeve is bonded to the inner wall of the hot air channel 8 by a high-temperature resistant adhesive.
[0025] The sleeve is made of high temperature resistant ceramics, which may be oxide ceramics (such as aluminum oxide ceramics).
[0026] The thickness of the cylindrical heat insulation layer 9 is 2 mm to 12 mm.
[0027] Example 2
[0028] like Figure 2 As shown, the difference between the energy-saving air outlet small sleeve in this embodiment and embodiment 1 is:
[0029] A front annular recess 31 is provided on the inner side surface of the rear section of the inner wall of the outer sleeve 3, and the front annular recess 31 is located in front of the first annular weld 5; a rear annular recess 12 is provided on the inner side surface of the front section of the inner wall of the flange 1, and the rear annular recess 12 is located in the rear side of the second annular weld 6; the inner wall of the front annular recess 31, the inner side surface of the inner sleeve 2 and the inner wall of the rear annular recess 12 together form an annular groove 10 with the notch facing inward, the first annular weld 5 and the second annular weld 6 are both located on the bottom of the annular groove 10, and the cylindrical thermal insulation layer 9 is located in the annular groove 10.
[0030] The cylindrical heat insulation layer 9 is formed by self-flowing castable (self-flowing castable is a castable refractory material that can flow and degas without vibration). Usually, the self-flowing castable is poured into the annular groove 10 and forms the cylindrical heat insulation layer 9 after solidification.
[0031] The rear end of the outer wall of the sleeve 3 is connected to the front end of the outer wall of the flange 1 through a third annular weld 32 .
[0032] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. The technical personnel of the technical field to which the utility model belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.
Claims
1. An energy-saving air outlet sleeve, comprising a flange, an inner sleeve, an outer sleeve and a deflector, wherein the outer sleeve is arranged outside the inner sleeve, the rear end of the outer sleeve outer wall is fixedly connected to the front end of the outer wall of the flange, the rear end of the inner wall of the outer sleeve is connected to the front end of the inner sleeve through a first annular weld, and the rear end of the inner sleeve is connected to the front end of the inner wall of the flange through a second annular weld; the outer sleeve, the inner sleeve and the flange form an internal cavity, and the deflector is arranged in the internal cavity; the flange is provided with a water inlet and a water outlet; the air outlet sleeve has a hot air channel running forward and backward, and is characterized in that: A cylindrical heat insulation layer is provided on the inner wall of the hot air channel, and the first annular weld and the second annular weld are both located outside the cylindrical heat insulation layer and are covered by the cylindrical heat insulation layer.
2. The energy-saving air outlet sleeve according to claim 1 is characterized in that: The cylindrical heat insulation layer is a sleeve that is small at the front and large at the back, and the outer side surface of the sleeve is in close contact with the inner wall of the hot air channel.
3. The energy-saving air outlet sleeve according to claim 2 is characterized in that: The outer side surface of the sleeve is bonded to the inner wall of the hot air channel by a high temperature resistant adhesive.
4. The energy-saving air outlet sleeve according to claim 2 is characterized in that: The sleeve is made of high temperature resistant ceramics.
5. The energy-saving air outlet sleeve according to claim 2 is characterized in that: The thickness of the cylindrical heat insulation layer is 2mm-12mm.
6. The energy-saving air outlet sleeve according to claim 1 is characterized in that: A front annular recess is provided on the inner side surface of the rear section of the inner wall of the outer sleeve, and the front annular recess is located on the front side of the first annular weld; a rear annular recess is provided on the inner side surface of the front section of the inner wall of the flange, and the rear annular recess is located on the rear side of the second annular weld; the inner wall of the front annular recess, the inner side surface of the inner sleeve and the inner wall of the rear annular recess together form an annular groove with the notch facing inward, the first annular weld and the second annular weld are both located on the bottom of the annular groove, and the cylindrical thermal insulation layer is located in the annular groove.
7. The energy-saving air outlet sleeve according to claim 6 is characterized in that: The cylindrical heat insulation layer is formed by self-flowing castable material.