CN107903918B - Air supply structure and air supply method of vertical waste heat recovery device - Google Patents
Air supply structure and air supply method of vertical waste heat recovery device Download PDFInfo
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- CN107903918B CN107903918B CN201711350388.8A CN201711350388A CN107903918B CN 107903918 B CN107903918 B CN 107903918B CN 201711350388 A CN201711350388 A CN 201711350388A CN 107903918 B CN107903918 B CN 107903918B
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- air
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- supply assembly
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- air duct
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Air Supply (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention relates to an air supply structure and an air supply method of a vertical waste heat recovery device, wherein the air supply structure comprises a shaft furnace shell, an upper cone hopper, a lower cone hopper, an annular air duct and a cross air duct; the device also comprises a central air supply assembly and a branch air supply assembly; the central air supply assembly is arranged right below the cross part of the cross air duct, and the top of the central air supply assembly is communicated with the cross air duct; the branch air supply assembly is arranged right below 4 branch air channels forming the cross air channel, and the top of the branch air supply assembly is communicated with the corresponding branch air channel. The invention can improve the uniformity of gas-solid heat exchange in the shaft furnace and the production efficiency of the shaft furnace.
Description
Technical Field
The invention relates to the technical field of waste heat recovery, in particular to a gas supply structure and a gas supply method of a vertical waste heat recovery device.
Background
For waste heat recovery of high-temperature solid materials, the shaft furnace is the first choice in the technical field of waste heat recovery due to the characteristics of high heat exchange efficiency, high waste heat quality, small occupied area and the like, and a dry quenching device in the coking field, a waste heat high-efficiency utilization system of sinter and the like all adopt the shaft furnace as heat exchange equipment of the core, wherein the shaft furnace is most widely applied to dry quenching production in the coking industry.
In a dry quenching apparatus, an air supply device installed at the bottom of a shaft furnace (also called a dry quenching furnace) has a great influence on uniformity of coke drop and uniformity of air flow distribution in the shaft furnace. If the structure is favorable for the uniform drop of the coke in the furnace in the circumferential direction and the uniform distribution of the cold circulating gas entering the shaft furnace in the circumferential direction of the shaft furnace, the uniform cooling of the coke in the furnace is realized, so that the cooling performance of the shaft furnace is improved, the cooling efficiency of the shaft furnace is improved, the dry quenching time of the coke in the shaft furnace is reduced, the volume of a cooling chamber of the shaft furnace is reduced, the gas-material ratio of ton coke is reduced, and the construction investment and the running cost of the whole set of dry quenching device are greatly reduced; this will be more pronounced for large-scale dry quenching devices.
The patent application No. 200710158949.4 (the application day is 12 months and 17 days in 2007) discloses a special air supply device for a dry quenching furnace, which consists of an upper cone hopper, a lower cone hopper, a dry quenching furnace shell, an annular air duct, a cross air duct and a central air cap, wherein the upper cone hopper and the lower cone hopper are sleeved together, an annular gap formed by the sleeved eave forms the annular air duct, the cross air duct is positioned at the upper part of the lower cone hopper, is horizontally arranged, and the center of the cross air duct is overlapped with the center of the dry quenching furnace and extends upwards to be communicated with the central air cap arranged at the upper part of the cone hopper. The device adopts a wind supply mode of combining the wind supply from the outside to the inside of the peripheral wind ring and the wind supply from the inside to the outside of the upper part of the furnace body of the central wind cap, and the central wind cap is arranged on the cross wind channel.
The Chinese patent with application number 201610263740.3 (application date is 2016, 4 and 26) discloses a multi-air-channel star-shaped air supply device for a dry quenching furnace and a coke cooling method in the dry quenching furnace, wherein peripheral air ring air supply and central air cap air inlet are respectively divided into a plurality of areas, and the star-shaped multi-air-channel form is adopted for supplying air to each area, so that optimization and local air supply adjustment of each air channel can be realized, and the coke cooling in the dry quenching furnace is more uniform.
However, in the above air supply scheme, the central hood is arranged above the cross air duct, and occupies a part of space in the cone hopper at the lower part of the shaft furnace, so that the material at the upper part of the cross air duct is blocked at the central hood, the material at the position is forced to turn, the material falls unevenly in the shaft furnace, and the heat exchange uniformity of the material and circulating gas is affected. In addition, the central hood is positioned at the center of the shaft furnace, circulating gas enters the central hood upwards after passing through the cross air duct, is forced to turn back downwards after encountering the obstruction of the hood, the process increases the pressure loss of the circulating gas, increases the working load of the circulating fan, and simultaneously, the circulating gas is concentrated to enter from the central zone, and can cause the imbalance of the air flow distribution in the nearby area, thereby affecting the uniformity of gas-solid heat exchange and reducing the production efficiency of the shaft furnace.
Disclosure of Invention
The invention provides a gas supply structure and a gas supply method of a vertical waste heat recovery device, which can improve the uniformity of gas-solid heat exchange in a shaft furnace and the production efficiency of the shaft furnace.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the air supply structure of the vertical waste heat recovery device comprises a shaft furnace shell, an upper cone hopper, a lower cone hopper, an annular air duct and a cross air duct; the upper cone hopper and the lower cone hopper are sleeved and inserted together, and annular gaps formed after the upper cone hopper and the lower cone hopper are sleeved and inserted form an annular air duct; the cross air duct is horizontally arranged at the upper part of the lower cone hopper, and the center of the cross air duct coincides with the center of the shaft furnace; the air chamber formed by the upper cone hopper, the lower cone hopper and the shaft furnace shell is divided into an upper layer of air chamber and a lower layer of air chamber which are completely isolated, wherein the upper air chamber is communicated with the annular air duct, and the lower air chamber is communicated with the cross air duct; the device also comprises a central air supply assembly and a branch air supply assembly; the central air supply assembly is arranged right below the cross part of the cross air duct, and the top of the central air supply assembly is communicated with the cross air duct; the branch air supply assembly is arranged right below 4 branch air channels forming the cross air channel, and the top of the branch air supply assembly is communicated with the corresponding branch air channel.
An air quantity adjusting plate is arranged on the sleeve inserting eave between the upper cone hopper and the lower cone hopper.
The main bodies of the central air supply assembly and the branch air supply assemblies are of tubular structures, the bottom ends of the main bodies are provided with horizontal plates or wedge-shaped plates and provided with bottom openings, a plurality of lateral openings are arranged along the height direction of the periphery of the main bodies, and conical baffles are correspondingly arranged above the lateral openings.
The cross section of the central air supply assembly or the branch air supply assembly main body is round or rectangular.
The main body diameter of the central air supply assembly is larger than that of the branch air supply assemblies, and the main body diameters of the central air supply assembly and the branch air supply assemblies are matched with the cross air duct sizes of the corresponding installation positions respectively.
The included angle between the inclined surface of the conical baffle and the horizontal plane is larger than the repose angle of the material; the included angle (angle C in figure 3) between the connecting line of the lower edge of the upper conical baffle and the upper edge of the lower conical baffle and the horizontal plane is smaller than the repose angle of the material.
The air supply method of the vertical waste heat recovery device based on the air supply structure comprises the steps that external circulating air respectively enters the shaft furnace from an upper air chamber and a lower air chamber at the lower part of the shaft furnace, wherein the air entering the upper air chamber enters the shaft furnace through an annular air duct to supply air into the shaft furnace in a peripheral air ring mode, and the entering air quantity is regulated by an air quantity regulating plate; the gas entering the lower air chamber enters the cross air duct from 4 inlets circumferentially arranged on the cross air duct, one part of the gas is converged into a central gas supply assembly below the cross air duct at the cross intersection, then enters the lower cone hopper through a lateral opening and a bottom opening by the central gas supply assembly, and the other part of the gas enters the branch gas supply assemblies below the branches of the cross air duct, enters the lower cone hopper through the circumferential openings and the bottom openings on the branch gas supply assemblies, and is used for uniformly cooling the materials in the shaft furnace.
Compared with the prior art, the invention has the beneficial effects that:
1) The central blast cap arranged above the cross air duct is omitted, so that the material above the cross air duct descends more uniformly, and the central air supply assembly and the branch air supply assembly for supplying air to the downward cone hopper are arranged below the cross air duct, so that the obstruction and the interference on the material in the shaft furnace are not increased, and the uniform falling and the uniform cooling of the material are facilitated;
2) After the gas entering the cross air duct enters the central gas supply assembly and the branch gas supply assemblies downwards, the gas can directly enter the material layer, so that the resistance in the gas supply structure is reduced, and the energy consumption of the waste heat recovery system can be reduced;
3) The gas in the lower gas chamber is supplied into the shaft furnace through the central gas supply assembly and the plurality of branch gas supply assemblies uniformly distributed along the circumferential direction through the cross air duct, so that multiple points of the gas along the circumferential direction and multiple layers of gas along the high direction are formed, the distribution of the gas in the lower cone hopper is more uniform, the uniform cooling of materials is facilitated, and the production efficiency of the shaft furnace is improved.
Drawings
Fig. 1 is a vertical central sectional view of an air supply structure of a vertical type waste heat recovery device according to the present invention.
Fig. 2 is A-A view of fig. 1.
Fig. 3 is an enlarged view of a portion B in fig. 1.
In the figure: 1. shaft furnace shell 2, upper cone hopper 3, lower cone hopper 4, annular air duct 5, cross air duct 6, central air supply component 7, branch air supply component 8, upper air chamber 9, lower air chamber 10, air quantity regulating plate 11 and conical baffle plate
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in fig. 1 and 2, the air supply structure of the vertical waste heat recovery device comprises a shaft furnace shell 1, an upper cone hopper 2, a lower cone hopper 3, an annular air duct 4 and a cross air duct 5; the upper cone hopper 2 and the lower cone hopper 3 are sleeved and inserted together, and annular gaps formed after the upper cone hopper 2 and the lower cone hopper 3 are sleeved and inserted form an annular air duct 4; the cross air duct 5 is horizontally arranged at the upper part of the lower cone hopper 3, and the center of the cross air duct coincides with the center of the shaft furnace; the air chamber formed by the upper cone hopper 2, the lower cone hopper 3 and the shaft furnace shell 1 is divided into an upper layer of air chamber and a lower layer of air chamber which are completely isolated, wherein the upper air chamber 8 is communicated with the annular air duct 4, and the lower air chamber 9 is communicated with the cross air duct 5; also comprises a central air supply assembly 6 and a branch air supply assembly 7; the central air supply assembly 6 is arranged right below the cross part of the cross air duct 5, and the top of the central air supply assembly 6 is communicated with the cross air duct 5; the branch air supply assembly 7 is arranged right below 4 branch air channels forming the cross air channel 5, and the top of the branch air supply assembly 7 is communicated with the corresponding branch air channels.
An air quantity adjusting plate 10 is arranged on the sleeve inserting eave between the upper cone hopper 2 and the lower cone hopper 3.
As shown in fig. 3, the main bodies of the central air supply assembly 6 and the branch air supply assemblies 7 are tubular structures, the bottom ends of the main bodies are provided with horizontal plates or wedge-shaped plates and bottom openings, a plurality of lateral openings are arranged along the height direction of the periphery of the main bodies, and conical baffles 11 are correspondingly arranged above the lateral openings.
The cross section of the main body of the central air supply assembly 6 or the branch air supply assembly 7 is circular or rectangular.
The main body diameter of the central air supply assembly 6 is larger than that of the branch air supply assemblies 7, and the main body diameters of the central air supply assembly 6 and the branch air supply assemblies 7 are matched with the sizes of the cross air channels 5 at the corresponding installation positions respectively.
The included angle between the inclined surface of the conical baffle 11 and the horizontal plane is larger than the repose angle of the material; the included angle between the upper edge connecting line of the upper layer conical baffle and the upper edge connecting line of the lower layer conical baffle and the horizontal plane is smaller than the repose angle of the material.
The air supply method of the vertical waste heat recovery device based on the air supply structure comprises the steps that external circulating air respectively enters the shaft furnace from an upper air chamber 8 and a lower air chamber 9 at the lower part of the shaft furnace, wherein the air entering the upper air chamber 8 enters the shaft furnace through an annular air duct 4 and is supplied to the shaft furnace in a peripheral air ring mode, and the entering air quantity is regulated by an air quantity regulating plate 10; the gas entering the lower air chamber 9 enters the cross air duct 5 from 4 inlets which are circumferentially arranged on the cross air duct 5, part of the gas is converged into a central air supply assembly 6 below the cross of the cross air duct 5, then enters the lower cone hopper 3 through a lateral opening and a bottom opening by the central air supply assembly 6, and the other part of the gas enters a branch air supply assembly 7 below each branch channel of the cross air duct 5, enters the lower cone hopper 3 through a circumferential opening and a bottom opening on each branch air supply assembly 7, and is used for uniformly cooling the materials in the shaft furnace.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The air supply structure of the vertical waste heat recovery device comprises a shaft furnace shell, an upper cone hopper, a lower cone hopper, an annular air duct and a cross air duct; the upper cone hopper and the lower cone hopper are sleeved and inserted together, and annular gaps formed after the upper cone hopper and the lower cone hopper are sleeved and inserted form an annular air duct; the cross air duct is horizontally arranged at the upper part of the lower cone hopper, and the center of the cross air duct coincides with the center of the shaft furnace; the air chamber formed by the upper cone hopper, the lower cone hopper and the shaft furnace shell is divided into an upper layer of air chamber and a lower layer of air chamber which are completely isolated, wherein the upper air chamber is communicated with the annular air duct, and the lower air chamber is communicated with the cross air duct; the device is characterized by also comprising a central air supply assembly and a branch air supply assembly; the central air supply assembly is arranged right below the cross part of the cross air duct, and the top of the central air supply assembly is communicated with the cross air duct; the branch air supply assembly is arranged right below 4 branch air channels forming the cross air channel, and the top of the branch air supply assembly is communicated with the corresponding branch air channel.
2. The air supply structure of the vertical waste heat recovery device according to claim 1, wherein an air quantity adjusting plate is arranged on the sleeve inserted eave between the upper cone hopper and the lower cone hopper.
3. The air supply structure of a vertical waste heat recovery device according to claim 1, wherein the main bodies of the central air supply assembly and the branch air supply assemblies are tubular structures, a horizontal plate or a wedge-shaped plate is arranged on the bottom surface of the main body, a bottom opening is formed, a plurality of lateral openings are formed in the periphery of the main body along the height direction, and a conical baffle is correspondingly arranged above the lateral openings.
4. A gas supply structure of a vertical heat recovery device according to claim 3, wherein the cross section of the central gas supply assembly or the branch gas supply assembly main body is circular or rectangular.
5. A gas supply structure of a vertical waste heat recovery device according to claim 3, wherein the main body diameter of the central gas supply assembly is larger than the main body diameter of the branch gas supply assembly, and the main body diameters of the central gas supply assembly and the branch gas supply assembly are respectively matched with the cross air duct sizes of the corresponding installation positions.
6. A gas supply structure of a vertical waste heat recovery device according to claim 3, wherein the inclined surface of the conical baffle forms an angle with the horizontal plane larger than the repose angle of the material; the included angle between the upper edge connecting line of the upper layer conical baffle and the upper edge connecting line of the lower layer conical baffle and the horizontal plane is smaller than the repose angle of the material.
7. A gas supply method based on the vertical waste heat recovery device of the gas supply structure according to claim 1, characterized in that external circulating gas enters the shaft furnace from an upper gas chamber and a lower gas chamber at the lower part of the shaft furnace respectively, wherein the gas entering the upper gas chamber enters the shaft furnace through an annular air duct to supply gas into the shaft furnace in the form of a peripheral air ring, and the entering air quantity is regulated by an air quantity regulating plate; the gas entering the lower air chamber enters the cross air duct from 4 inlets circumferentially arranged on the cross air duct, one part of the gas is converged into a central gas supply assembly below the cross air duct at the cross intersection, then enters the lower cone hopper through a lateral opening and a bottom opening by the central gas supply assembly, and the other part of the gas enters the branch gas supply assemblies below the branches of the cross air duct, enters the lower cone hopper through the circumferential openings and the bottom openings on the branch gas supply assemblies, and is used for uniformly cooling the materials in the shaft furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350388.8A CN107903918B (en) | 2017-12-15 | 2017-12-15 | Air supply structure and air supply method of vertical waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350388.8A CN107903918B (en) | 2017-12-15 | 2017-12-15 | Air supply structure and air supply method of vertical waste heat recovery device |
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| Publication Number | Publication Date |
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| CN107903918A CN107903918A (en) | 2018-04-13 |
| CN107903918B true CN107903918B (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711350388.8A Active CN107903918B (en) | 2017-12-15 | 2017-12-15 | Air supply structure and air supply method of vertical waste heat recovery device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186831A (en) * | 2007-12-17 | 2008-05-28 | 中冶焦耐工程技术有限公司 | Special-purpose gas supplying device for coke dry quenching unit |
| CN207738692U (en) * | 2017-12-15 | 2018-08-17 | 中冶焦耐(大连)工程技术有限公司 | A kind of gas-supplying structure of vertical waste-heat recovery device |
-
2017
- 2017-12-15 CN CN201711350388.8A patent/CN107903918B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186831A (en) * | 2007-12-17 | 2008-05-28 | 中冶焦耐工程技术有限公司 | Special-purpose gas supplying device for coke dry quenching unit |
| CN207738692U (en) * | 2017-12-15 | 2018-08-17 | 中冶焦耐(大连)工程技术有限公司 | A kind of gas-supplying structure of vertical waste-heat recovery device |
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| CN107903918A (en) | 2018-04-13 |
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