CN116465206A - Cyclone preheater with built-in air guide - Google Patents
Cyclone preheater with built-in air guide Download PDFInfo
- Publication number
- CN116465206A CN116465206A CN202310573952.1A CN202310573952A CN116465206A CN 116465206 A CN116465206 A CN 116465206A CN 202310573952 A CN202310573952 A CN 202310573952A CN 116465206 A CN116465206 A CN 116465206A
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- Prior art keywords
- cyclone
- straight air
- cylinder
- mixing
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000463 material Substances 0.000 claims abstract description 32
- 239000000428 dust Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 239000004568 cement Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 28
- 239000002245 particle Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
-
- 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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
- F27D2013/007—Apparatus for preheating charges; Arrangements for preheating charges using a rotary furnace
-
- 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
- F27D2017/009—Cyclone for separating fines from gas
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Cyclones (AREA)
Abstract
The invention relates to the field of cement production equipment, in particular to an air guide built-in cyclone preheater, which comprises a cyclone barrel, a mixing heat exchanger, a straight air inlet pipe, a straight air outlet pipe and a connecting pipe; the top of the cyclone cylinder is provided with a feed inlet, and the bottom of the cyclone cylinder is provided with a discharge outlet; according to the invention, materials are vertically and downwards fed from above in the mixing heat exchanger, and gas is obliquely and upwards fed from below, so that the gas flow and the descending material flow form cross convection mixing, and the materials are more uniformly distributed in the gas; according to the invention, the annular heat exchange tube, the straight air inlet tube and the straight air outlet tube are arranged, so that the air flow cannot be strongly deflected in bending, accumulation and agglomeration of materials at the bending position are avoided, and the air flow resistance is reduced; according to the invention, the annular heat exchange tube, the straight air inlet tube and the straight air outlet tube are arranged in the cyclone preheater, so that the whole multi-stage cyclone preheating system is more compact, namely, the multi-stage cyclone preheating system has a lower total height compared with the prior art.
Description
Technical Field
The invention relates to the field of cement production equipment, in particular to an air guide built-in cyclone preheater.
Background
Cyclone preheaters are used for separating fine substances from flowing gas by centrifugal force, and comprise a cylindrical shell, which is inclined towards the bottom, and a gas flow containing solid particles to be separated is cut directly from below a cover of the top closing shell, so that a swirling flow is formed in the shell, in the process, the particles are thrown against a wall under the action of centrifugal force, the particles are strongly decelerated there due to the action of friction force, the decelerated particles then slide downwards in a container, and enter a gas supply pipe or a collecting container entering the next lower separator through an outlet opening provided at the lower end of the separator shell, and the purified gas flow is again extracted from the separator shell through a gas outlet pipe arranged in the center of the upper cover;
the prior cyclone preheater mainly comprises a Hongbao type cyclone, a Smith type cyclone and the like, wherein the cyclone is approximately funnel-shaped, the top of the cyclone is connected with an air outlet pipe, the bottom of the cyclone is connected with a discharging pipe, the side wall of the upper part of the cyclone is provided with an air inlet, the cyclone is arranged in a left-right crossing way to form 2 longitudinal parallel axes, the air outlet pipe of the next cyclone is connected with the air inlet of the cyclone at the left upper side or the right upper side of the cyclone, the discharging pipe of the upper cyclone right above the cyclone is connected in the air outlet pipe of the cyclone in an inserting way, and the cyclones are vertically connected in series, and a decomposing furnace is arranged between the two-stage cyclone preheaters to form a multi-stage cyclone preheating system;
the multi-stage cyclone preheating consisting of such cyclone preheaters has the following disadvantages:
1. the system has a larger overall height, resulting in higher pressure loss in the lift gas stage connecting the various separator stages, and also higher cost requirements;
2. the material falling from the discharge pipe of the separator is fed transversely into the rising gas flow, which results in a high impulse exchange between the material and the gas flow, is liable to cause wear of the pipe system and is disadvantageous for an even distribution of the material in the gas flow, resulting in an undesirable heat exchange;
3. because of the structure of the left-right cross connection design of each cyclone preheater in the multi-stage cyclone preheater, the heat exchange pipeline is strongly bent, materials can accumulate and agglomerate at the bent part, and the moving route of the material gas is greatly prolonged by the left-right cross design structure, so that the flow resistance of the system is increased.
Disclosure of Invention
Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to solve the problems of the conventional multi-stage cyclone preheating system by providing an annular heat exchange tube, a straight air inlet tube and a straight air outlet tube, and by providing the annular heat exchange tube, the straight air inlet tube and the straight air outlet tube inside the cyclone preheater, and by implementing the following technical scheme:
the cyclone preheater with built-in air guide comprises a cyclone cylinder, a mixing heat exchanger, a straight air inlet pipe, a straight air outlet pipe and a connecting pipe; the top of the cyclone cylinder is provided with a feed inlet, and the bottom of the cyclone cylinder is provided with a discharge outlet; a mixing heat exchanger is fixedly arranged in the cyclone cylinder near the upper end; the mixing heat exchanger consists of a mixing cylinder, a spiral heat exchange tube, a material collecting disc and a dispersing air disc; the outer wall of the mixing drum is provided with a spiral heat exchange tube; the upper end of the mixing drum is provided with a material collecting disc which is of an inverted cone-shaped disc structure and is positioned right below a feed inlet on the cyclone; a dispersing air disc is arranged at the lower end of the mixing drum; the straight air inlet pipe is fixedly arranged at the right lower end of the internal mixing heat exchanger of the cyclone barrel, and the upper end of the straight air inlet pipe is communicated with the interior of the mixing barrel; a straight air outlet pipe is fixedly arranged in the straight air inlet pipe, and a connecting pipe is arranged between the straight air outlet pipe and the straight air inlet pipe; the other end of the connecting pipe is communicated with the inside of the cyclone cylinder.
Preferably, a plurality of cyclone preheaters with built-in air guide are arranged up and down to form a multi-stage cyclone preheating system.
Preferably, one end port of the spiral heat exchange tube is communicated with the inner wall of the mixing drum in a tangential manner, and the other end port of the spiral heat exchange tube is communicated with the inner wall of the cyclone drum in a tangential manner.
Preferably, the dispersing wind disc is of a forward conical disc structure, the dispersing wind disc and the collecting disc are arranged oppositely, and a plurality of dispersing wind holes are formed in the conical surface of the dispersing wind disc.
Preferably, one end of the straight air outlet pipe passes through the center of the mixing heat exchanger and is communicated with the waste gas dust removal system inside the straight air inlet pipe of the upper stage or outside the system, and the other end of the straight air outlet pipe is communicated with the connecting pipe.
Preferably, the gas in the straight air inlet pipe is dispersed into a plurality of airflows through the dispersing air holes on the dispersing air disc, and enters the mixing drum to be mixed with the materials flowing down on the material collecting disc, and flows out of the mixing drum through the spiral heat exchange tube after being mixed, after the material gas separation is completed by forming the rotational flow in the cyclone drum, the gas can enter the straight air outlet pipe through the connecting pipe and enter the exhaust gas dust removal system in the straight air inlet pipe of the upper stage or outside the system through the straight air outlet pipe.
The invention has the beneficial effects that:
1. in the mixing heat exchanger, materials are vertically fed downwards from above, and gas is obliquely fed upwards from below, so that the gas flow and the descending material flow form cross convection mixing, and the materials are distributed more uniformly in the gas;
2. by arranging the annular heat exchange tube, the straight air inlet tube and the straight air outlet tube, the air flow can not deflect strongly in bending, the accumulation and agglomeration of materials at the bending position are avoided, and the air flow resistance is reduced;
3. the annular heat exchange tube, the straight air inlet tube and the straight air outlet tube are arranged in the cyclone preheater, so that the whole multi-stage cyclone preheating system is more compact, namely, the multi-stage cyclone preheating system has lower total height compared with the prior art;
4. the mixed gas enters the cyclone cylinder in a cyclone mode after passing through the spiral heat exchange tube on the mixed heat exchanger, so that the transition of the mixed gas entering the cyclone cylinder is particularly stable, and the interference turbulence is avoided;
5. the annular heat exchange tube is arranged, so that the heat exchange time of the material and the high-temperature flue gas is longer;
6. the annular heat exchange tube, the straight air inlet tube and the straight air outlet tube are arranged in the cyclone preheater, so that heat emitted by high-temperature gas when flowing in the tube is not lost, and the temperature in the cyclone tube and the annular heat exchange tube is higher, so that the heat exchange efficiency is higher.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a cyclone preheater with built-in air guide.
FIG. 2 is a schematic diagram of a cyclone preheater with built-in air guide in a semi-sectional view.
Fig. 3 is a cross-sectional view taken along line A-A in fig. 2.
Reference numerals illustrate: 100. a cyclone; 110. a feed inlet; 120. a discharge port; 200. a hybrid heat exchanger; 210. a mixing drum; 220. a spiral heat exchange tube; 230. a material collecting disc; 240. a dispersion wind disc; 241. dispersing air holes; 300. a straight air inlet pipe; 400. a straight air outlet pipe; 500. and (5) connecting pipes.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention may be embodied in various forms, and thus the present invention is not limited to the embodiments described below, and in addition, components not connected to the present invention will be omitted from the drawings for the sake of more clarity of description of the present invention;
as shown in fig. 1, a plurality of cyclone preheaters with built-in air guide are arranged up and down to form a multi-stage cyclone preheating system;
as shown in fig. 2 and 3, a cyclone preheater with built-in air guide comprises: cyclone 100, mixing heat exchanger 200, straight air inlet pipe 300, straight air outlet pipe 400 and connecting pipe 500;
the cyclone 100 is approximately funnel-shaped, a feed inlet 110 is arranged at the top of the cyclone 100, a discharge outlet 120 is arranged at the bottom of the cyclone 100, a mixing heat exchanger 200 is fixedly arranged in the cyclone 100 near the upper end of the cyclone, the mixing heat exchanger 200 consists of a mixing cylinder 210, a spiral heat exchange tube 220, a collecting disc 230 and a dispersing wind disc 240, wherein the mixing cylinder 210 is of a cylindrical structure, the outer wall of the mixing cylinder 210 is provided with the spiral heat exchange tube 220, one end port of the spiral heat exchange tube 220 is communicated with the inner wall of the mixing cylinder 210 in a tangential manner, the other end port of the spiral heat exchange tube is communicated with the inner wall of the cyclone 100 in a tangential manner, the collecting disc 230 is arranged at the upper end of the mixing cylinder 210, the collecting disc 230 is of an inverted cone-shaped disc structure and is positioned right below the feed inlet 110 on the cyclone 100, materials flowing from the feed inlet 110 fall into the collecting disc 230 and are discharged from the middle lower end of the collecting disc 230, the lower end of the mixing cylinder 210 is provided with the dispersing wind disc 240, the dispersing wind disc 240 is of a regular cone-shaped disc structure, the dispersing wind disc 240 is arranged opposite to the collecting disc 230, and a plurality of dispersing wind holes 241 are arranged on the conical surface of the dispersing wind disc 240;
the straight air inlet pipe 300 is fixedly installed at the right lower end of the internal mixing heat exchanger 200 of the cyclone 100, the upper end of the straight air inlet pipe 300 is communicated with the interior of the mixing drum 210, the straight air outlet pipe 400 is fixedly installed in the interior of the straight air inlet pipe 300, a connecting pipe 500 is arranged between the straight air outlet pipe 400 and the straight air inlet pipe 300, one end of the straight air outlet pipe 400 penetrates through the center of the mixing heat exchanger 200 and is communicated with an exhaust gas dust removal system in the interior or outside the system of the straight air inlet pipe 300 of the previous stage, the other end of the straight air outlet pipe 400 is communicated with the connecting pipe 500, the other end of the connecting pipe 500 is communicated with the interior of the cyclone 100, gas in the straight air inlet pipe 300 is dispersed into a plurality of airflows through dispersing air holes 241 on a dispersing air disc 240 to enter the interior of the mixing drum 210 to be mixed with materials flowing down on a material collecting disc 230, after being mixed, the airflows flow out to the interior of the cyclone 100 through the spiral heat exchange pipe 220, and after the material gas separation is completed in the cyclone 100, the gas can enter the interior of the straight air outlet pipe 400 through the connecting pipe 500 and enter the exhaust gas dust removal system of the previous stage through the straight air inlet pipe 300 or outside the system through the straight air outlet pipe 500.
The working principle of the invention is as follows:
the high temperature flue gas discharged from the rotary kiln enters from the straight air inlet pipe 300 in the cyclone preheater at the lowest end, the material discharged from the pulverizer enters from the feed inlet 110 on the cyclone preheater at the highest end, the high temperature flue gas flows into the mixing cylinder 210 through the straight air inlet pipe 300, is dispersed into a plurality of airflows by the dispersing air holes 241 on the dispersing air disk 240 in the mixing cylinder 210, the material entering from the feed inlet 110 enters into the mixing cylinder 210 through the collecting disk 230 and collides with and mixes with the airflows sprayed from the dispersing air holes 241, the mixed airflows are formed and then discharged into the cyclone cylinder 100 from the spiral heat exchange pipe 220, and after the material gas separation is completed in the cyclone cylinder 100, the gas can enter into the straight air outlet pipe 400 through the connecting pipe 500 and enter into the straight air inlet pipe 300 at the upper stage or an exhaust gas dust removal system outside the system through the straight air outlet pipe 400.
Claims (6)
1. The cyclone preheater with the built-in air guide comprises a cyclone cylinder (100), a mixing heat exchanger (200), a straight air inlet pipe (300), a straight air outlet pipe (400) and a connecting pipe (500); the method is characterized in that: the top of the cyclone cylinder (100) is provided with a feed inlet (110), and the bottom of the cyclone cylinder is provided with a discharge outlet (120); a mixing heat exchanger (200) is fixedly arranged in the cyclone cylinder (100) near the upper end; the mixing heat exchanger (200) consists of a mixing cylinder (210), a spiral heat exchange tube (220), a material collecting disc (230) and a dispersing air disc (240); the outer wall of the mixing cylinder (210) is provided with a spiral heat exchange tube (220); the upper end of the mixing cylinder (210) is provided with a material collecting disc (230), and the material collecting disc (230) is of an inverted cone-shaped disc structure and is positioned right below a feed inlet (110) on the cyclone cylinder (100); the lower end of the mixing cylinder (210) is provided with a dispersing wind disc (240); the straight air inlet pipe (300) is fixedly arranged at the right lower end of the internal mixing heat exchanger (200) of the cyclone cylinder (100), and the upper end of the straight air inlet pipe (300) is communicated with the inside of the mixing cylinder (210); a straight air outlet pipe (400) is fixedly arranged in the straight air inlet pipe (300), and a connecting pipe (500) is arranged between the straight air outlet pipe (400) and the straight air inlet pipe (300); the other end of the connecting pipe (500) is communicated with the inside of the cyclone cylinder (100).
2. The cyclone preheater with built-in air guide as set forth in claim 1, wherein: and a plurality of the cyclone preheaters with built-in air guide are arranged up and down to form a multi-stage cyclone preheating system.
3. The cyclone preheater with built-in air guide as set forth in claim 1, wherein: one end port of the spiral heat exchange tube (220) is communicated with the inner wall of the mixing cylinder (210) in a tangential mode, and the other end port of the spiral heat exchange tube is communicated with the inner wall of the cyclone cylinder (100) in a tangential mode.
4. The cyclone preheater with built-in air guide as set forth in claim 1, wherein: the dispersing air disc (240) is of a forward conical disc structure, the dispersing air disc (240) and the collecting disc (230) are arranged oppositely, and a plurality of dispersing air holes (241) are formed in the conical surface of the dispersing air disc (240).
5. The cyclone preheater with built-in air guide as set forth in claim 1, wherein: one end of the straight air outlet pipe (400) passes through the center of the mixing heat exchanger (200) and is communicated with an exhaust gas dust removal system inside or outside the system of the straight air inlet pipe (300) of the upper stage, and the other end of the straight air outlet pipe is communicated with the connecting pipe (500).
6. The cyclone preheater with built-in air guide as set forth in claim 1, wherein: the gas in the straight air inlet pipe (300) is dispersed into a plurality of airflows through the dispersing air holes (241) on the dispersing air disc (240) to enter the mixing cylinder (210) to be mixed with the materials flowing down on the material collecting disc (230), the mixture flows out of the cyclone cylinder (100) through the spiral heat exchange pipe (220), after the cyclone cylinder (100) is internally provided with cyclone flow to finish material-gas separation, the gas can enter the straight air outlet pipe (400) through the connecting pipe (500) and enter the exhaust gas dust removal system in the straight air inlet pipe (300) of the upper stage or outside the system through the straight air outlet pipe (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310573952.1A CN116465206A (en) | 2023-05-22 | 2023-05-22 | Cyclone preheater with built-in air guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310573952.1A CN116465206A (en) | 2023-05-22 | 2023-05-22 | Cyclone preheater with built-in air guide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116465206A true CN116465206A (en) | 2023-07-21 |
Family
ID=87184503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310573952.1A Pending CN116465206A (en) | 2023-05-22 | 2023-05-22 | Cyclone preheater with built-in air guide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116465206A (en) |
-
2023
- 2023-05-22 CN CN202310573952.1A patent/CN116465206A/en active Pending
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