CN218994076U - Automatic ash scraping type high-temperature heat exchange device for flue gas settling chamber - Google Patents
Automatic ash scraping type high-temperature heat exchange device for flue gas settling chamber Download PDFInfo
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- CN218994076U CN218994076U CN202223026624.XU CN202223026624U CN218994076U CN 218994076 U CN218994076 U CN 218994076U CN 202223026624 U CN202223026624 U CN 202223026624U CN 218994076 U CN218994076 U CN 218994076U
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Abstract
The utility model discloses an automatic ash scraping type high-temperature heat exchange device for a flue gas settling chamber, which comprises a heat exchange component, wherein the heat exchange component is arranged in the flue gas settling chamber, and the heat exchange component heats cold air introduced from the outside through dust-containing high-temperature flue gas generated by a rotary kiln to form hot air for a drying procedure of a chain grate; the ash scraping component is arranged in the heat exchange component and is used for scraping corrosive mineral dust adhered to the outer wall of the heat exchange pipe; and the sealing assembly is arranged between the ash scraping assembly and the heat exchange assembly. The heat exchange assembly comprises an air box cover, an upper flower disc rib plate, a lower flower disc rib plate, a cooling inner tube and a cooling outer tube.
Description
Technical Field
The utility model relates to the technical field of high-temperature heat exchange equipment in the mining metallurgy industry, in particular to an automatic ash scraping type high-temperature heat exchange device for a flue gas settling chamber.
Background
The flue gas settling chamber is the simplest device for collecting dust in metallurgical industry, which uses gravity to naturally settle and then collect mineral dust in dust-containing flue gas. In the gold extraction process of gold concentrate cyanide tailings by chloridizing and volatilizing, the material undergoes chloridizing reaction in a rotary kiln at a high temperature of 1100-1200 ℃ to generate gold-containing chloridized flue gas (the temperature is about 600-700 ℃) which is discharged from a kiln tail cover and enters a subsequent flue gas absorbing and washing system to further recover valuable metals. The high-temperature gold-containing chlorinated flue gas firstly enters a flue gas settling chamber for cooling and dust collection, and a heat exchange device is arranged in the flue gas settling chamber for fully utilizing the heat of the high-temperature flue gas for recycling the process so as to achieve the purpose of saving energy. However, as the main components of the high Wen Hanjin chloridized flue gas are corrosive substances such as chlorides of various metals, cl2, HCl and the like, the following problems exist when the common heat exchanger on the market at home and abroad is used: on one hand, the condensation dirt is easy to generate on the surface of the heat exchange tube, so that the heat resistance is increased, the heat exchange efficiency is reduced, the flue gas channel is blocked, and the dust collection effect is influenced; on the other hand, the flue gas is easy to generate condensed acid on the surface of the heat exchange tube, has corrosiveness, causes the damage of the tube wall, and reduces the service life of equipment.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide an automatic ash scraping type high-temperature heat exchange device for a flue gas settling chamber, which has the characteristics of corrosion resistance, high temperature resistance, difficult scale condensation and automatic ash removal, and the ash scraping component and the heat exchange component are integrated, so that the structure is simple and compact, the dust collection and cooling efficiency of high-temperature flue gas containing gold and chloridizing is improved, and the service life of equipment is prolonged.
The aim of the utility model is realized by the following technical scheme:
an automatic ash scraping type high-temperature heat exchange device for a flue gas settling chamber, comprising:
the heat exchange assembly is arranged in the flue gas sedimentation chamber, and heats cold air introduced from the outside through dust-containing high-temperature flue gas generated by the rotary kiln to form hot air for a drying procedure of the grate;
the ash scraping component is arranged in the heat exchange component and is used for scraping corrosive mineral dust adhered to the outer wall of the heat exchange pipe;
and the sealing assembly is arranged between the ash scraping assembly and the heat exchange assembly.
Further, the heat exchange assembly comprises an air box cover, an upper flower disc rib plate, a lower flower disc rib plate, a cooling inner tube and a cooling outer tube; the upper flower disc and the upper flower disc rib plate are sequentially arranged on the lower side of the air box cover, the lower flower disc is arranged on the lower side of the upper flower disc rib plate, a gap is reserved between the lower flower disc and the upper flower disc rib plate, and the lower flower disc rib plate is arranged on the lower flower disc; the cooling outer tube is installed in the downside of lower flower disc, the cooling inner tube is installed in the downside of last flower disc, the cooling inner tube downside runs through upper flower disc gusset, lower flower disc gusset and lower flower disc and extends to in the cooling outer tube.
Further, the ash scraping component comprises a lifting frame, a lifting frame upper column head, a lifting frame supporting rod, a scraping disc rib plate, a lifting frame lower column head and a hexagonal nut; the lifting frame support rod penetrates through the heat exchange assembly, the lifting frame is fixed on the lifting frame support rod through a hexagonal nut and a lifting frame upper column head, the lower side end of the lifting frame support rod is fixed on the scraping plate rib plate through a lifting frame lower column head and a hexagonal nut, a scraping plate is arranged on the upper side of the scraping plate rib plate, and the scraping plate is arranged on the lower side of the lower flower plate; the sealing component is arranged on the lifting frame supporting rod.
Further, the sealing assembly comprises an air box supporting sealing column, a first sealing block, a second sealing block, a sealing inner ring and a sealing outer sleeve; the air box supporting sealing column is sleeved on the outer wall of the lifting frame supporting rod, the upper side end of the air box supporting sealing column is in butt joint with the upper column head of the lifting frame, the lower side end of the air box supporting sealing column is in butt joint with the lower flower disc, and the air box supporting sealing column penetrates through the air box cover, the upper flower disc rib plate and the lower flower disc rib plate; the first sealing block and the second sealing block are positioned on the upper side of the air box cover and are fixed on the outer wall of the air box supporting sealing column through bolts; the sealing inner ring is sleeved on the outer wall of the lifting frame supporting rod, the sealing inner ring is nested in the sealing outer sleeve, and the sealing inner ring and the sealing outer sleeve are positioned on the upper side of the air box cover.
Furthermore, lifting lugs are welded on the lifting frames.
Furthermore, a plurality of uniformly distributed air inlets are drilled on the air box cover.
The utility model has the beneficial effects that:
1. the automatic ash scraping type high-temperature heat exchange device for the flue gas settling chamber provided by the utility model utilizes the high-temperature flue gas generated by the production system to heat the external cold air introduced into the flue gas settling chamber, fully utilizes the production waste heat, and achieves the purposes of saving energy consumption and reducing cost;
2. the device is mainly made of ND steel, 310S stainless steel and 304 stainless steel, and has the advantages of high temperature resistance, corrosion resistance, difficult adhesion of mineral dust, high heat exchange efficiency and long service period compared with a common heat exchanger;
3. considering that heat transfer device installs in the flue gas settling chamber, through long-term use back, the difficult scale that congeals that forms certain thickness on the pipe wall of cooling outer tube leads to the thermal resistance to increase, reduces heat exchange efficiency, blocks up the flue gas passageway, influences the dust collection and the cooling effect of flue gas, and the device is equipped with scrapes grey subassembly, adopts electric block to realize automatic rising and pipe wall and scrapes grey, and work efficiency is high, can save the cost of labor, significantly reduces because of the pipe wall scrapes the unnecessary stopping frequency that grey leads to, is favorable to improving enterprise economic benefits.
Drawings
FIG. 1 is a schematic diagram of the general assembly of the present utility model;
FIG. 2 is a front view of the present utility model;
fig. 3 is a process flow diagram of an embodiment of the application of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the first embodiment, as shown in fig. 1 to 3, an automatic ash scraping type high-temperature heat exchange device for a flue gas settling chamber comprises a heat exchange component, wherein the heat exchange component is installed in the flue gas settling chamber, and the heat exchange component heats cold air introduced from the outside through dust-containing high-temperature flue gas generated by a rotary kiln to form hot air for a drying procedure of a grate;
the ash scraping component is arranged in the heat exchange component and is used for scraping corrosive mineral dust adhered to the outer wall of the heat exchange pipe;
and the sealing assembly is arranged between the ash scraping assembly and the heat exchange assembly.
The method is characterized in that the application of gold concentrate cyanide tailings in the chloridizing, volatilizing and gold extracting process is taken as an embodiment, the cyanide tailings are subjected to chloridizing reaction in a rotary kiln at the high temperature of 1100-1200 ℃, gold-containing chloridized flue gas (the temperature is about 600-700 ℃) is generated, the generated gold-containing chloridized flue gas is discharged from a kiln tail cover and enters a subsequent flue gas absorbing and washing system to further recover valuable metals, and the first time is the flue gas settling chamber for dust collection and cooling. The automatic ash scraping type high-temperature heat exchange device provided by the utility model is arranged in the flue gas settling chamber. The heat exchange component is a heat exchange component of the device, cold air introduced from the outside is heated by high-temperature chloridizing flue gas entering the flue gas settling chamber, and the formed hot air is used as a heat source for a drying wet ball procedure of a chain grate in a chloridizing gold extraction process, so that the consumption of natural gas can be reduced, and the production cost is reduced; the ash scraping component is arranged in the heat exchange component, when the high-temperature heat exchange device is used for a long time, a certain amount of corrosive mineral dust adheres to the outer wall of the cooling outer tube to form condensed scale, and the ash scraping component is driven by the electric hoist to move up and down along the tube wall of the cooling outer tube through the lifting component so as to remove the condensed scale of the tube wall; the sealing component is arranged between the ash scraping component and the heat exchange component, and has the functions of sealing, dust prevention, heat loss reduction and heat exchange efficiency improvement.
The present embodiment is further configured to: the heat exchange assembly comprises an air box cover 3, an upper flower disc 4, an upper flower disc rib plate 5, a lower flower disc 6, a lower flower disc rib plate 10, a cooling inner tube 11 and a cooling outer tube 12; the upper flower disc 4 and the upper flower disc rib plate 5 are sequentially arranged on the lower side of the air box cover 3, the lower flower disc 6 is arranged on the lower side of the upper flower disc rib plate 5, a gap is reserved between the lower flower disc 6 and the upper flower disc rib plate 5, and the lower flower disc rib plate 10 is arranged on the lower flower disc 6; the cooling outer tube 12 is arranged on the lower side of the lower flower disc 6, the cooling inner tube 11 is arranged on the lower side of the upper flower disc 4, and the lower side of the cooling inner tube 11 penetrates through the upper flower disc rib plate 5, the lower flower disc rib plate 10 and the lower flower disc 6 and extends into the cooling outer tube 12.
In this embodiment, the cooling inner tube 11 and the cooling outer tube 12 are both provided with a plurality of rectangular structures.
The present embodiment is further configured to: the ash scraping assembly comprises a lifting frame 1, a lifting frame upper column head 2, a lifting frame supporting rod 7, a scraping disc 8, a scraping disc rib plate 9, a lifting frame lower column head 18 and a hexagonal nut 19; the lifting frame support rod 7 penetrates through the heat exchange assembly, the lifting frame 1 is fixed on the lifting frame support rod 7 through a hexagonal nut 19 and a lifting frame upper column head 2, the lower side end of the lifting frame support rod 7 is fixed on the scraping plate rib plate 9 through a lifting frame lower column head 18 and a hexagonal nut 19, a scraping plate 8 is arranged on the upper side of the scraping plate rib plate 9, and the scraping plate 8 is arranged on the lower side of the lower flower plate 6; the seal assembly is mounted on the crane stay 7.
In this embodiment, the lifting frame 1 is a rectangular frame as a whole, and the number of the lifting frame supporting rods 7 is specifically four, which are arranged in a rectangular array.
The present embodiment is further configured to: the sealing assembly comprises an air box supporting sealing column 13, a first sealing block, a second sealing block, a sealing inner ring and a sealing outer sleeve 14; the air box supporting sealing column 13 is sleeved on the outer wall of the lifting frame supporting rod 7, the upper side end of the air box supporting sealing column 13 is in butt joint with the lifting frame upper column head 2, the lower side end of the air box supporting sealing column 13 is in butt joint with the lower flower disc 6, and the air box supporting sealing column 13 penetrates through the air box cover 3, the upper flower disc 4, the upper flower disc rib plate 5 and the lower flower disc rib plate 10; the first sealing block and the second sealing block are positioned on the upper side of the air box cover 3 and are fixed on the outer wall of the air box supporting sealing column 13 through bolts; the sealing inner ring is sleeved on the outer wall of the lifting frame supporting rod 7, the sealing inner ring is nested in the sealing outer sleeve 14, and the sealing inner ring and the sealing outer sleeve 14 are positioned on the upper side of the air box cover 3.
The present embodiment is further configured to: lifting lugs are welded on the lifting frame 1.
In this embodiment, the lifting lug is used for the electric block of top to lift and drop crane 1 through wire rope, makes it can realize electric lift in the production process.
The present embodiment is further configured to: a plurality of evenly distributed air inlet holes are drilled on the air box cover 3.
In this embodiment, the air intake holes are used to send external cold air into the cooling inner tube 11 of the heat exchange assembly.
The device utilizes the high-temperature flue gas generated by the rotary kiln to heat the external cold air introduced into the flue gas settling chamber, fully utilizes the production waste heat, and uses the hot air in the drying process of the chain grate machine, thereby achieving the purposes of saving the consumption of natural gas and reducing the production cost; the device is mainly made of ND steel, 310S stainless steel and 304 stainless steel, and has the advantages of high temperature resistance, corrosion resistance, difficult adhesion of mineral dust, high heat exchange efficiency and long service period compared with a common heat exchanger; after heat transfer device uses in the flue gas settling chamber for a long time, can not avoid forming the scale that congeals of certain thickness on the pipe wall of cooling outer tube, lead to the thermal resistance to increase, reduce heat exchange efficiency, block up the flue gas passageway, influence the dust collection and the cooling effect of flue gas, the device is equipped with scrapes grey subassembly, adopt electric block and wire rope to lift by crane the crane, can realize scraping the mechanized automatic rising and the pipe wall of grey subassembly and scrape the ash, the ash that scrapes falls to the ash storage of bottom, scrape grey work efficiency height, labor strength has been reduced, the cost of labor has been saved, the unnecessary stopping times that leads to because of the pipe wall scrapes the ash significantly reduces, be favorable to improving enterprise economic benefits.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", "left", "right", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in place when the inventive product is used, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Claims (6)
1. An automatic ash scraping type high-temperature heat exchange device for a flue gas settling chamber, which is characterized by comprising:
the heat exchange assembly is arranged in the flue gas sedimentation chamber, and heats cold air introduced from the outside through dust-containing high-temperature flue gas generated by the rotary kiln to form hot air for a drying procedure of the grate;
the ash scraping component is arranged in the heat exchange component and is used for scraping corrosive mineral dust adhered to the outer wall of the heat exchange pipe;
and the sealing assembly is arranged between the ash scraping assembly and the heat exchange assembly.
2. An automatic ash scraping type high temperature heat exchange device for a flue gas settling chamber according to claim 1, wherein: the heat exchange assembly comprises an air box cover (3), an upper flower disc (4), an upper flower disc rib plate (5), a lower flower disc (6), a lower flower disc rib plate (10), a cooling inner tube (11) and a cooling outer tube (12); the upper flower disc (4) and the upper flower disc rib plate (5) are sequentially arranged on the lower side of the air box cover (3), the lower flower disc (6) is arranged on the lower side of the upper flower disc rib plate (5), a gap is reserved between the lower flower disc (6) and the upper flower disc rib plate (5), and the lower flower disc rib plate (10) is arranged on the lower flower disc (6); the cooling outer tube (12) is arranged on the lower side of the lower flower disc (6), the cooling inner tube (11) is arranged on the lower side of the upper flower disc (4), and the lower side of the cooling inner tube (11) penetrates through the upper flower disc rib plate (5), the lower flower disc rib plate (10) and the lower flower disc (6) and extends into the cooling outer tube (12).
3. An automatic ash scraping type high temperature heat exchange device for a flue gas settling chamber according to claim 2, wherein: the ash scraping assembly comprises a lifting frame (1), a lifting frame upper column head (2), a lifting frame supporting rod (7), a scraping disc (8), a scraping disc rib plate (9), a lifting frame lower column head (18) and a hexagonal nut (19); the lifting frame support rod (7) penetrates through the heat exchange assembly, the lifting frame (1) is fixed on the lifting frame support rod (7) through a hexagonal nut (19) and a lifting frame upper column head (2), the lower side end of the lifting frame support rod (7) is fixed on the scraping plate rib plate (9) through a lifting frame lower column head (18) and a hexagonal nut (19), the scraping plate (8) is arranged on the upper side of the scraping plate rib plate (9), and the scraping plate (8) is arranged on the lower side of the lower flower plate (6); the sealing component is arranged on the lifting frame stay bar (7).
4. An automatic ash scraping type high temperature heat exchange device for a flue gas settling chamber according to claim 3, wherein: the sealing assembly comprises an air box supporting sealing column (13), a first sealing block, a second sealing block, a sealing inner ring and a sealing outer sleeve (14); the air box supporting sealing column (13) is sleeved on the outer wall of the lifting frame supporting rod (7), the upper side end of the air box supporting sealing column (13) is abutted against the lifting frame upper column head (2), the lower side end of the air box supporting sealing column (13) is abutted against the lower flower disc (6), and the air box supporting sealing column (13) penetrates through the air box cover (3), the upper flower disc (4), the upper flower disc rib plates (5) and the lower flower disc rib plates (10); the first sealing block and the second sealing block are positioned on the upper side of the air box cover (3) and are fixed on the outer wall of the air box supporting sealing column (13) through bolts; the sealing inner ring is sleeved on the outer wall of the lifting frame supporting rod (7), the sealing inner ring is nested in the sealing outer sleeve (14), and the sealing inner ring and the sealing outer sleeve (14) are positioned on the upper side of the air box cover (3).
5. An automatic ash scraping type high temperature heat exchange device for a flue gas settling chamber according to claim 3, wherein: lifting lugs are welded on the lifting frame (1).
6. An automatic ash scraping type high temperature heat exchange device for a flue gas settling chamber according to claim 2, wherein: a plurality of evenly distributed air inlets are drilled on the air box cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223026624.XU CN218994076U (en) | 2022-11-14 | 2022-11-14 | Automatic ash scraping type high-temperature heat exchange device for flue gas settling chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223026624.XU CN218994076U (en) | 2022-11-14 | 2022-11-14 | Automatic ash scraping type high-temperature heat exchange device for flue gas settling chamber |
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| Publication Number | Publication Date |
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| CN218994076U true CN218994076U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223026624.XU Active CN218994076U (en) | 2022-11-14 | 2022-11-14 | Automatic ash scraping type high-temperature heat exchange device for flue gas settling chamber |
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| CN (1) | CN218994076U (en) |
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- 2022-11-14 CN CN202223026624.XU patent/CN218994076U/en active Active
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