CN210656706U - Preheating and predecomposition system for dry cement production - Google Patents
Preheating and predecomposition system for dry cement production Download PDFInfo
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- CN210656706U CN210656706U CN201921679820.2U CN201921679820U CN210656706U CN 210656706 U CN210656706 U CN 210656706U CN 201921679820 U CN201921679820 U CN 201921679820U CN 210656706 U CN210656706 U CN 210656706U
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Abstract
The utility model relates to a preheating pre-decomposition system for dry cement production, which comprises a decomposing furnace, a rotary kiln, a double-series preheater, a high-temperature fan and collecting cyclones, wherein discharge ports of the double-series preheater are connected with feed ports of the decomposing furnace through the two collecting cyclones, discharge ports of the decomposing furnace and the two collecting cyclones are connected with feed ports of the rotary kiln, and the high-temperature fan is connected with an upper end air outlet of the double-series preheater through a pipeline; the utility model discloses with the help of the multistage heat exchange of two series of preheaters realization powder, the powder fully contacts with the high temperature flue gas that rises step by step, has prolonged the contact time of powder and high temperature flue gas by a wide margin for the powder can the rapid heating to standard temperature in order to reach anticipated preheating and predecomposition effect, thereby has improved the utilization ratio of cement output and high temperature flue gas.
Description
Technical Field
The utility model relates to a system of decomposing in advance preheats for dry process cement manufacture.
Background
Since the eighties of the twentieth century, the dry-process cement production process is rapidly popularized and gradually becomes a mainstream production process; before the powder used in the dry cement production process is calcined, the powder must be treated by a preheating pre-decomposition system; the existing preheating and predecomposition system for dry cement production cannot make powder material contact with high-temperature flue gas for a long time, so that the utilization rate of the high-temperature flue gas is low, the powder material cannot be sufficiently heated, the expected preheating and predecomposition effects cannot be achieved, the cement yield cannot be improved, and further improvement is waited.
SUMMERY OF THE UTILITY MODEL
To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a preheating predissociation system for dry cement production has been provided to the utilization ratio that has improved cement output and high temperature flue gas has prolonged the contact time of powder and high temperature flue gas by a wide margin so that the powder can the rapid heating to standard temperature in order to reach anticipated preheating and predecomposition effect in advance.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a preheating and predecomposition system for dry cement production comprises a decomposing furnace, a rotary kiln, a double-series preheater, a high-temperature fan and collecting cyclones, and is characterized in that discharge ports of the double-series preheater are connected with feed ports of the decomposing furnace through the two collecting cyclones, discharge ports of the decomposing furnace and the two collecting cyclones are connected with feed ports of the rotary kiln, and the high-temperature fan is connected with an upper end air outlet of the double-series preheater through a pipeline; the double-series preheater comprises a first cyclone, a second cyclone, a third cyclone, a fourth cyclone, a first connecting pipe, a second connecting pipe and a plurality of heat exchange assemblies, wherein the feed inlets of the first cyclone and the second cyclone are connected in parallel, the feed inlets of the third cyclone and the fourth cyclone are connected in parallel, the heat exchange assemblies are vertically overlapped, and the heat exchange assembly at the lowest side is connected with the decomposing furnace through the first connecting pipe and the second connecting pipe; the heat exchange assembly comprises a fifth cyclone, a sixth cyclone, an air pipe and a blanking assembly, wherein a discharge port of the fifth cyclone is connected with a discharge port of the sixth cyclone through the blanking assembly; the height difference exists between the fifth cyclone and the sixth cyclone, the interiors of the first cyclone and the second cyclone are mutually communicated with the interior of the fifth cyclone in the uppermost heat exchange assembly through an air pipe, the interiors of the third cyclone and the fourth cyclone are mutually communicated with the interior of the sixth cyclone in the uppermost heat exchange assembly through an air pipe, the interiors of the fifth cyclones in two adjacent heat exchange assemblies are mutually communicated through an air pipe, and the interiors of the sixth cyclones in two adjacent heat exchange assemblies are also mutually communicated through an air pipe; the interiors of the fifth cyclone and the sixth cyclone in the heat exchange assembly at the lowest side are communicated with the interior of the rotary kiln.
Preferably, the interiors of the fifth cyclone and the sixth cyclone in the lowest heat exchange assembly are respectively communicated with the interiors of the two collecting cyclones through an air pipe.
Preferably, the discharge port of the fifth cyclone in the lowest heat exchange assembly is connected with the air pipe arranged between the sixth cyclone and one of the collecting cyclones through the first connecting pipe.
Preferably, the discharge port of the sixth cyclone in the lowest heat exchange assembly is connected with the feed port of the decomposing furnace through a second connecting pipe.
Preferably, the blanking assembly comprises a main pipe, a branch pipe, a first valve, a second valve, an expansion joint, a heavy hammer flap valve and an air cannon; the main pipe and the branch pipe are respectively provided with a first valve and a second valve; the first valve is arranged on the downstream side of the joint of the branch pipe and the main pipe, the main pipe and the branch pipe are respectively provided with an expansion joint, a heavy hammer flap valve and an air cannon, the two expansion joints are respectively arranged on the downstream sides of the first valve and the second valve and respectively arranged on the upstream sides of the two heavy hammer flap valves, and the two air cannons are respectively arranged on the downstream sides of the two heavy hammer flap valves.
Preferably, one end of the main pipe is connected with a discharge port of the fifth cyclone, the other end of the main pipe is communicated with an air pipe arranged on the sixth cyclone, one end of the branch pipe is connected to the main pipe, and the other end of the branch pipe is communicated with an air pipe arranged on the fifth cyclone in one heat exchange assembly on the lower side.
Compared with the prior art, the utility model has the advantages of: the utility model discloses with the help of the multistage heat exchange of two series of preheaters realization powder, the powder fully contacts with the high temperature flue gas that rises step by step, has prolonged the contact time of powder and high temperature flue gas by a wide margin for the powder can the rapid heating to standard temperature in order to reach anticipated preheating and predecomposition effect, thereby has improved the utilization ratio of cement output and high temperature flue gas.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a structural diagram of a dual series preheater according to the present invention;
fig. 3 is a structural diagram of the blanking assembly of the present invention.
Detailed Description
As shown in fig. 1 to 3, a preheating pre-decomposition system for dry cement production comprises a decomposition furnace 4, a rotary kiln 5, a dual-series preheater 7, a high temperature fan 8 and a collecting cyclone 9, wherein a discharge port of the dual-series preheater 7 is connected with a feed port of the decomposition furnace 4 through the two collecting cyclones 9, discharge ports of the decomposition furnace 4 and the two collecting cyclones 9 are both connected with a feed port of the rotary kiln 5, and the high temperature fan 8 is connected with an upper end air outlet of the dual-series preheater 7 through a pipeline; the double-series preheater 7 comprises a first cyclone 111, a second cyclone 112, a third cyclone 113, a fourth cyclone 114, a first connecting pipe 10, a second connecting pipe 6 and a plurality of heat exchange assemblies, wherein the feed inlets of the first cyclone 111 and the second cyclone 112 are connected in parallel, the feed inlets of the third cyclone 113 and the fourth cyclone 114 are connected in parallel, the plurality of heat exchange assemblies are vertically stacked, and the heat exchange assembly at the lowest side is connected with the decomposing furnace 4 through the first connecting pipe 10 and the second connecting pipe 6; the heat exchange assembly comprises a fifth cyclone 121, a sixth cyclone 122, an air pipe 2 and a discharging assembly 3, wherein a discharging port of the fifth cyclone 121 is connected with a discharging port of the sixth cyclone 122 through the discharging assembly 3; the fifth cyclone 121 and the sixth cyclone 122 have a height difference, the interiors of the first cyclone 111 and the second cyclone 112 are communicated with the interior of the fifth cyclone 121 in the uppermost heat exchange assembly through one air duct 2, the interiors of the third cyclone 113 and the fourth cyclone 114 are communicated with the interior of the sixth cyclone 122 in the uppermost heat exchange assembly through one air duct 2, the interiors of the fifth cyclones 121 in two adjacent heat exchange assemblies are communicated with each other through one air duct 2, and the interiors of the sixth cyclones 122 in two adjacent heat exchange assemblies are also communicated with each other through one air duct 2; the interiors of the fifth cyclone 121 and the sixth cyclone 122 in the lowest heat exchange assembly are communicated with the interior of the rotary kiln 5; the insides of the fifth cyclone 121 and the sixth cyclone 122 in the lowest heat exchange assembly are respectively communicated with the insides of the two collecting cyclones 9 through an air pipe 2, the discharge port of the fifth cyclone 121 in the lowest heat exchange assembly is connected with the air pipe 2 arranged between the sixth cyclone 122 and one of the collecting cyclones 9 through a first connecting pipe 10, and the discharge port of the sixth cyclone 122 in the lowest heat exchange assembly is connected with the feed port of the decomposing furnace 4 through a second connecting pipe 6; the blanking component 3 comprises a main pipe 32, a branch pipe 36, a first valve 31, a second valve 37, an expansion joint 33, a heavy hammer flap valve 34 and an air cannon 35; one end of the main pipe 32 is connected with the discharge port of the fifth cyclone 121, the other end of the main pipe 32 is communicated with the air duct 2 arranged on the sixth cyclone 122, one end of the branch pipe 36 is connected to the main pipe 32, the other end of the branch pipe 36 is communicated with the air duct 2 arranged on the fifth cyclone 121 in a heat exchange assembly at the lower side, and the main pipe 32 and the branch pipe 36 are respectively provided with a first valve 31 and a second valve 37; the first valve 31 is arranged on the downstream side of the joint of the branch pipe 36 and the main pipe 32, the main pipe 32 and the branch pipe 36 are respectively provided with an expansion joint 33, a weight flap valve 34 and an air cannon 35, the two expansion joints 33 are respectively arranged on the downstream sides of the first valve 31 and the second valve 37 and are respectively arranged on the upstream sides of the two weight flap valves 34, and the two air cannons 35 are respectively arranged on the downstream sides of the two weight flap valves 34.
The working principle is as follows: the powder is divided into four strands to enter a first cyclone 111, a second cyclone 112, a third cyclone 113 and a fourth cyclone 114 respectively, and then flows downwards and sequentially through a plurality of heat exchange assemblies, high-temperature flue gas generated by the decomposing furnace 4 ascends step by step through a plurality of air pipes 2, and the powder falls step by step through a plurality of blanking assemblies 3 and enters each air pipe 2, so that heat exchange is fully carried out on the powder and the high-temperature flue gas in the air pipes 2, and multi-stage heat exchange is realized; finally, the powder forms two strands of powder in a fifth cyclone 121 and a sixth cyclone 122 of a heat exchange assembly at the lowest side, wherein one strand of powder enters the decomposing furnace 4 through the second connecting pipe 6, the other strand of powder also enters the decomposing furnace 4 through the first connecting pipe 10 and one of the collecting cyclones 9, the powder is pre-decomposed in the decomposing furnace 4 and then enters the rotary kiln 5 for calcination after the pre-decomposition is completed, and high-temperature flue gas in the system is extracted outwards under the action of the high-temperature fan 8.
The existing preheating and predecomposition system for dry cement production cannot make powder contact with high-temperature flue gas for a long time, so that the utilization rate of the high-temperature flue gas is low, the powder cannot be sufficiently heated, the expected preheating and predecomposition effects cannot be achieved, and the cement yield cannot be improved; the utility model discloses with the help of two series of preheaters 7 realize the multistage heat exchange of powder, the powder fully contacts with the high temperature flue gas that rises step by step, has prolonged the contact time of powder and high temperature flue gas by a wide margin for the powder can the rapid heating to standard temperature in order to reach anticipated preheating and predecomposition effect, thereby has improved the utilization ratio of cement output and high temperature flue gas.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A preheating and predecomposition system for dry cement production comprises a decomposing furnace, a rotary kiln, a double-series preheater, a high-temperature fan and collecting cyclones, and is characterized in that discharge ports of the double-series preheater are connected with feed ports of the decomposing furnace through the two collecting cyclones, discharge ports of the decomposing furnace and the two collecting cyclones are connected with feed ports of the rotary kiln, and the high-temperature fan is connected with an upper end air outlet of the double-series preheater through a pipeline; the double-series preheater comprises a first cyclone, a second cyclone, a third cyclone, a fourth cyclone, a first connecting pipe, a second connecting pipe and a plurality of heat exchange assemblies, wherein the feed inlets of the first cyclone and the second cyclone are connected in parallel, the feed inlets of the third cyclone and the fourth cyclone are connected in parallel, the heat exchange assemblies are vertically overlapped, and the heat exchange assembly at the lowest side is connected with the decomposing furnace through the first connecting pipe and the second connecting pipe; the heat exchange assembly comprises a fifth cyclone, a sixth cyclone, an air pipe and a blanking assembly, wherein a discharge port of the fifth cyclone is connected with a discharge port of the sixth cyclone through the blanking assembly; the height difference exists between the fifth cyclone and the sixth cyclone, the interiors of the first cyclone and the second cyclone are mutually communicated with the interior of the fifth cyclone in the uppermost heat exchange assembly through an air pipe, the interiors of the third cyclone and the fourth cyclone are mutually communicated with the interior of the sixth cyclone in the uppermost heat exchange assembly through an air pipe, the interiors of the fifth cyclones in two adjacent heat exchange assemblies are mutually communicated through an air pipe, and the interiors of the sixth cyclones in two adjacent heat exchange assemblies are also mutually communicated through an air pipe; the interiors of the fifth cyclone and the sixth cyclone in the heat exchange assembly at the lowest side are communicated with the interior of the rotary kiln.
2. The system of claim 1, wherein the insides of the fifth cyclone and the sixth cyclone in the lowest heat exchange assembly are respectively communicated with the insides of the two collecting cyclones through an air duct.
3. The system of claim 1, wherein the discharge port of the fifth cyclone in the lowest heat exchange module is connected to the air duct between the sixth cyclone and one of the collecting cyclones through the first connection pipe.
4. The system of claim 3, wherein the outlet of the sixth cyclone in the lowest heat exchange unit is connected to the inlet of the decomposing furnace through a second connection pipe.
5. The system of claim 1, wherein the blanking assembly comprises a main pipe, a branch pipe, a first valve, a second valve, an expansion joint, a heavy hammer flap valve and an air cannon; the main pipe and the branch pipe are respectively provided with a first valve and a second valve; the first valve is arranged on the downstream side of the joint of the branch pipe and the main pipe, the main pipe and the branch pipe are respectively provided with an expansion joint, a heavy hammer flap valve and an air cannon, the two expansion joints are respectively arranged on the downstream sides of the first valve and the second valve and respectively arranged on the upstream sides of the two heavy hammer flap valves, and the two air cannons are respectively arranged on the downstream sides of the two heavy hammer flap valves.
6. The system of claim 5, wherein one end of the main pipe is connected to the outlet of the fifth cyclone, the other end of the main pipe is connected to the air duct of the sixth cyclone, one end of the branch pipe is connected to the main pipe, and the other end of the branch pipe is connected to the air duct of the fifth cyclone of a heat exchange assembly disposed at a lower side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921679820.2U CN210656706U (en) | 2019-10-09 | 2019-10-09 | Preheating and predecomposition system for dry cement production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921679820.2U CN210656706U (en) | 2019-10-09 | 2019-10-09 | Preheating and predecomposition system for dry cement production |
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| CN210656706U true CN210656706U (en) | 2020-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110510894A (en) * | 2019-10-09 | 2019-11-29 | 南京凯盛国际工程有限公司 | A kind of precalcining system for cement produced with the dry method production |
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2019
- 2019-10-09 CN CN201921679820.2U patent/CN210656706U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110510894A (en) * | 2019-10-09 | 2019-11-29 | 南京凯盛国际工程有限公司 | A kind of precalcining system for cement produced with the dry method production |
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Address after: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Patentee after: Zhongcai International Intelligent Technology Co.,Ltd. Address before: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Patentee before: NANJING KISEN INTERNATIONAL ENGINEERING Co.,Ltd. |
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