CN2859422Y - Cement predecomposing and kiln-tail sheet-preventing smoke room - Google Patents
Cement predecomposing and kiln-tail sheet-preventing smoke room Download PDFInfo
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- CN2859422Y CN2859422Y CN 200520143772 CN200520143772U CN2859422Y CN 2859422 Y CN2859422 Y CN 2859422Y CN 200520143772 CN200520143772 CN 200520143772 CN 200520143772 U CN200520143772 U CN 200520143772U CN 2859422 Y CN2859422 Y CN 2859422Y
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- skinning
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Abstract
The utility model discloses a cement predecomposing kiln-tail sheet-preventing smoke room, which has a whole bending shape with 90 degree. The apparatus includes a flue gas inlet connected with the rotary kiln (5) at the right bottom. The sheet-preventing smoke room (3) is disposed with a flue gas outlet connected with the decomposing furnace (4) on the top. The cavity has a feeding slope (7) inclined towards the rotary kiln at the bottom and a high temperature raw material feeding pipe (2) in the middle. The smoke room cavity below the high temperature rew material feeding pipe (2) is provided with a normal temperature raw material feeing pipe (1) wherein anair locking valve (9) is arranged thereon. The utility radically solves the generation of sheet and clogging in the cement predecomposing kiln-tail smoke room.
Description
Technical field
The utility model belongs to the technology in cement industry field of building material industry, and it relates generally to the anti-skinning smoke-box of a kind of cement nsp kiln tail.
Background technology
The cement nsp kiln is used for calcination of cement clinker.It is the rotary system that has preheater and dore furnace.Cement nsp kiln tail smoke-box is the parts that connect rotary kiln and dore furnace.It is that hot flue gas enters preheater in the rotary kiln, and the passage of dore furnace also is the passage that the high temperature raw material that next stage preheater enter rotary kiln.When existing various rotary kiln smoke-box is used as cement nsp kiln tail smoke-box, the capital exists cement slurry skinning and blocking problem, promptly liquid phase appears in high temperature (850 degree Celsius approximately) raw material by kiln tail smoke-box inner chamber too early, stratification is sticked at the place on kiln tail smoke-box blanking slope, be skinning, severe patient results in blockage, and causes the cement nsp kiln can't charging production.The main cause of skinning and obstruction is: one. the raw material of preparation cement slurry and coal low melting point (the 650-750 degree Celsius) material that is used for the calcining cement raw material are as potassium oxide, sodium oxide molybdena, the compound of chlorine or sulphur makes high temperature (850 degree Celsius approximately) raw material occur liquid phase too early, causes skinning and obstruction.Two. reasons such as nsp kiln system misoperation cause territory, the kiln tail region temperature of cement nsp kiln too high, make to enter kiln tail smoke-box high temperature (Celsius approximately 850 degree) raw material and occur liquid phase too early, cause skinning and obstruction.Cement nsp kiln tail smoke-box skinning and obstruction are ubiquities both at home and abroad, and recurrent.To or manually disclose and smash skinning and obstruction through pressure-air (as: air bubble) cleaning commonly used aborning.This method can not fundamentally solve the problem of kiln tail smoke-box skinning.
Summary of the invention
The purpose of this utility model provides the anti-skinning smoke-box of a kind of cement nsp kiln tail, in order to solve the skinning and the blocking problem of cement nsp kiln tail smoke-box.
The purpose of this utility model can adopt following technology side scheme to realize: it is whole for being the bend pipe of 90 degree, be provided with the kiln gas approach that is connected with rotary kiln in its lower right, the top of smoke-box is provided with the exhanst gas outlet that is connected with dore furnace, the bottom of smoke-box inner chamber has a blanking slope to the rotary kiln inclination, smoke-box inner chamber middle part is provided with a high temperature raw material inlet pipe, the smoke-box inner chamber of high temperature raw material pipe below is provided with a normal temperature raw material pipe, and on normal temperature raw material pipe an air valve is set.
The utility model does not change the agent structure of existing cement nsp kiln tail smoke-box, just the smoke-box inner chamber below high temperature raw material pipe is provided with a normal temperature raw material pipe, be availablely to send into normal temperature (Celsius approximately 50 degree) raw material from normal temperature raw material pipe, utilize a small amount of normal temperature raw material to be distributed in high temperature (850 degree Celsius approximately) raw material and enter the discharging point place of kiln tail smoke-box, i.e. place, kiln tail smoke-box blanking slope.Because normal temperature (50 degree Celsius approximately) the raw material ratio wherein fusing point of low melting point hangs down 650-700 degree Celsius, therefore, the normal temperature raw material do not contain liquid phase.The high temperature raw material that contain liquid phase drop on and do not contain on the liquid phase normal temperature raw material, are wrapped up by the normal temperature raw material, and slip in the rotary kiln rapidly with the normal temperature raw material, stick stratification cause skinning in kiln tail smoke-box and be unlikely.Going into raw material in the rotary kiln seethes to kiln hood with the rotation of rotary kiln and moves.Because containing the high temperature raw material of liquid phase is wrapped up by the normal temperature raw material, raw material in rotary kiln intensification slow (per minute is no more than 100) in addition, and kiln end temperature is relatively low, so the normal temperature raw material liquid phase can not occur at kiln tail place, therefore, big ball, ring formation problem can not appear tying yet at kiln tail place raw material.Thereby can prevent to contain high temperature raw material skinning in kiln tail smoke-box of liquid phase, stop up to reach and tie big ball and the appearance of ring formation fault at rotary kiln afterbody raw material.The utility model can fundamentally solve the skinning and the blocking problem of cement nsp kiln tail smoke-box.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Shown in the figure: 1, normal temperature raw material feed pipe, 2, high temperature raw material feed pipe, 3, anti-skinning smoke-box, 4, dore furnace, 5, rotary kiln, 6, sealing device, 7, the blanking slope, 8, refractory material, 9, air valve.
The specific embodiment
In conjunction with the accompanying drawings, specific embodiment of the utility model is described.
As shown in Figure 1: dotted portion is and other parts of cement nsp kiln of preventing that the skinning smoke-box is connected among the figure.Anti-skinning smoke-box 3 integral body described in the utility model are for being the bend pipes of 90 degree, and the inwall of anti-skinning smoke-box 3 is equiped with refractory material 8.Lower right at anti-skinning smoke-box 3 is provided with the kiln gas approach that docks with rotary kiln 5, and sealing device 6 sealings are arranged between the two.The top of anti-skinning smoke-box 3 is provided with the exhanst gas outlet that is connected by flange with dore furnace, the bottom of smoke-box inner chamber has a blanking slope to the rotary kiln inclination, the smoke-box inner chamber middle part of 7 tops, blanking slope is provided with a high temperature raw material pipe 2, the smoke-box inner chamber of high temperature raw material pipe 2 belows is provided with a normal temperature raw material pipe 1, and an air valve 9 is set on normal temperature raw material pipe 1.
The course of work of the present utility model and operation principle are as follows: coal dust is in the kiln hood portion burning of rotary kiln 5, form high-temperature flue gas and burn till grog to the moving raw material with reverse flow of kiln wake flow, the hot flue gas in the rotary kiln 5 enters dore furnace 4 by anti-skinning smoke-box 3 and is used as the raw material heating and decomposes.From normal temperature (the 50 degree Celsius approximately) raw material of raw material homogenizing storehouse, the normal temperature raw material pipe 1 from anti-skinning smoke-box 3 enters anti-skinning smoke-box 3.Enter normal temperature (the 50 degree Celsius approximately) raw material of anti-skinning smoke-box 3 and the mass ratio of high temperature (850 degree Celsius approximately) raw material and be about 5: 95.In anti-skinning smoke-box 3, normal temperature (50 degree Celsius approximately) raw material and high temperature (850 degree Celsius approximately) raw material are taken up in order of priority and are arrived on the blanking slope 7, and high temperature raw material and normal temperature raw material enter rotary kiln 5 by anti-skinning smoke-box 3 and are sintered into clinker.When the high temperature raw material that contain liquid phase enter the anti-skinning smoke-box 3 of kiln tail, one deck normal temperature raw material that distributed on its blanking slope 7, this part normal temperature raw material is wrapped in the high temperature raw material that contain liquid phase, and has isolated the high temperature raw material that contain liquid phase and contact with smoke-box blanking slope 7.Like this, the high temperature raw material that contain liquid phase just cause skinning on the blanking slope 7 that can not be attached on anti-skinning smoke-box 3.Simultaneously, the normal temperature raw material are wrapped in the high temperature raw material that contain liquid phase and promptly slip into rotary kiln 5, because sliding speed is fast, programming rate is slow, temperature is low, the normal temperature raw material that are wrapped in the high temperature raw material can not form liquid phase at rotary kiln 5 afterbodys, and therefore, raw material big ball and ring formation fault can not occur tying at rotary kiln 5 afterbodys yet.
Claims (1)
1, a kind of cement nsp kiln tail is prevented the skinning smoke-box, it is whole for being the bend pipe of 90 degree, be provided with the kiln gas approach that is connected with rotary kiln (5) in its lower right, its top is provided with the exhanst gas outlet that is connected with dore furnace (4), the bottom of anti-skinning smoke-box (3) inner chamber has a blanking slope (7) to the rotary kiln inclination, anti-skinning smoke-box inner chamber middle part is provided with a high temperature raw material feed pipe (2), it is characterized in that: anti-skinning smoke-box (3) inner chamber of high temperature raw material feed pipe (2) below is provided with a normal temperature raw material feed pipe (1), and an air valve (9) is set on normal temperature raw material feed pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520143772 CN2859422Y (en) | 2005-12-24 | 2005-12-24 | Cement predecomposing and kiln-tail sheet-preventing smoke room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520143772 CN2859422Y (en) | 2005-12-24 | 2005-12-24 | Cement predecomposing and kiln-tail sheet-preventing smoke room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859422Y true CN2859422Y (en) | 2007-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520143772 Expired - Fee Related CN2859422Y (en) | 2005-12-24 | 2005-12-24 | Cement predecomposing and kiln-tail sheet-preventing smoke room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2859422Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776721A (en) * | 2015-04-16 | 2015-07-15 | 天津水泥工业设计研究院有限公司 | Method and device for controlling smoke chamber skinning in cement production line |
| CN106907922A (en) * | 2017-03-13 | 2017-06-30 | 上海万澄环保科技有限公司 | A kind of cement rotary kiln kiln tail smoke-box for being provided with negative pressure adjusting device |
| CN109737755A (en) * | 2019-01-23 | 2019-05-10 | 南京西普水泥工程集团有限公司 | A kind of anti-skinning increase in pipeline |
| WO2021168934A1 (en) * | 2020-02-25 | 2021-09-02 | 南京西普水泥工程集团有限公司 | Anti-skinning device for kiln tail preheater |
-
2005
- 2005-12-24 CN CN 200520143772 patent/CN2859422Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776721A (en) * | 2015-04-16 | 2015-07-15 | 天津水泥工业设计研究院有限公司 | Method and device for controlling smoke chamber skinning in cement production line |
| CN106907922A (en) * | 2017-03-13 | 2017-06-30 | 上海万澄环保科技有限公司 | A kind of cement rotary kiln kiln tail smoke-box for being provided with negative pressure adjusting device |
| CN106907922B (en) * | 2017-03-13 | 2022-12-23 | 上海万澄环保科技有限公司 | Kiln tail smoke chamber of rotary cement kiln provided with negative pressure adjusting device |
| CN109737755A (en) * | 2019-01-23 | 2019-05-10 | 南京西普水泥工程集团有限公司 | A kind of anti-skinning increase in pipeline |
| WO2021168934A1 (en) * | 2020-02-25 | 2021-09-02 | 南京西普水泥工程集团有限公司 | Anti-skinning device for kiln tail preheater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |