CN88101763A - Produce the method and apparatus of cement clinker from cement raw slurry - Google Patents
Produce the method and apparatus of cement clinker from cement raw slurry Download PDFInfo
- Publication number
- CN88101763A CN88101763A CN198888101763A CN88101763A CN88101763A CN 88101763 A CN88101763 A CN 88101763A CN 198888101763 A CN198888101763 A CN 198888101763A CN 88101763 A CN88101763 A CN 88101763A CN 88101763 A CN88101763 A CN 88101763A
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- Prior art keywords
- cement
- slurry
- cement raw
- raw material
- dry
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/40—Dehydrating; Forming, e.g. granulating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/2016—Arrangements of preheating devices for the charge
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to from the method for the cement raw slurry production cement clinker of available pump conveying, cement raw slurry at first drying is made cement slurry, and then, the preheating in a multistage suspended preheater of this cement slurry becomes cement clinker at roasting in kilns then.At first the dry cement raw material told from the superlative degree of suspended preheater of cement raw slurry that available pump is carried and part mix, dry in a pneumatic conveying moisture eliminator then, produce cement slurry (as the feed product of suspended preheater), use for next step roasting.So just obtain a kind of economic especially fairly simple equipment of method and structure.
Description
The present invention relates to the method that a kind of cement raw slurry of carrying from available pump is produced cement clinker.The present invention also relates to implement the equipment of this method.
In order many known methods to be arranged with so-called wet production cement clinker, according to these methods, the wet cement raw material will make it to be dewatered to enough degree before it enters the kiln device or before entering kiln through special pre-treatment.Like this, the required total heat of roasting process will be reduced.
Usually all know in the present technique field, for example, at first will carry out mechanical dehydration, be made into filter cake for wet cement raw material, again it is directly added or the preliminary heating device before the dried raw material that adds joins kiln in.The total heat that these methods that wet cement raw material is carried out mechanical dehydration in advance no doubt can make sintering procedure need reduces, but they are only just considerable to investment, operation and the operator's of mechanical dewatering equipment (band filtration unit) expense.
Also known (DE-OS3311107), cement raw material is divided into two components and carries out pre-treatment respectively after by mixing tank, and like this, a component can be made the slip form, and another component is the form of doing and sends in the rotary kiln.
Also known from DE PS2400100, at least with the one-level spray drying treatment cement raw slurry is carried out drying in advance, this processing is arranged in before the suspended preheater of kiln, and be the waste gas that utilizes to come from suspended preheater, add a part again and carry out drying from the hot gas that a special stove produces.
Above last-mentioned two kinds of currently known methodss, except the suitable height of cost of upkeep, also factory is caused other considerable cost burden with wear and tear expenses.
Therefore, the objective of the invention is to overcome the shortcoming of currently known methods, developed the method that a kind of cement raw slurry of carrying from available pump is produced cement clinker.This method comprises, cement raw slurry at first in hot gas oven dry be cement slurry, the hot waste gas preheating by multistage suspended preheater usefulness kiln more then with this preheating, is fired into cement clinker to the burnt cement slurry of small part in kiln.It is characterized in that, at the cement clinker production period, a component of the dry cement raw material of preheating will be treated, former fractions of the suspended preheater that will at first pass through from these cement slurries extract, the dry cement raw material and the cement raw slurry of this component are mixed, again this mixture is used hot gas flow oven dry becoming cement slurry in the pneumatic conveying moisture eliminator from suspended preheater.The difference of the present invention and above all known means is that energy expenditure is lower, and operational wear is little, and is especially easy to maintenance, and the economic cost of factory is lower.In a word, according to the present invention, just can realize above-mentioned purpose.
According to conception of the present invention, in the manufacture of cement operational process, a kind of cement slurry of exsiccant of specified proportion is told from the superlative degree of suspended preheater continuously, and infiltrates in the cement raw slurry of the available pump conveying that has just transported.As a result, different with above-mentioned currently known methods, can mechanical dehydration be removed from, and can the cement raw material of humidity become a kind of can be dry in the pneumatic conveying moisture eliminator good especially state of reducing expenses again.Cement raw slurry and the mixture that forms of exsiccant raw material, it is very economical to carry out drying in the pneumatic conveying moisture eliminator, and this moisture eliminator is to utilize the hot gas of sending here from suspended preheater, especially uses the hot gas that what heat exchange level is come from its front to carry out exsiccant.
According to method of the present invention, favourable operating method is: have the dry cement raw material of q.s to divide continuously and extract, allow to generate a kind of moistening incoming mixture of being made up of cement slurry and cement raw slurry that is applicable to the pneumatic conveying moisture eliminator.Like this, the incoming mixture of gained can very successfully carry out drying in the pneumatic conveying moisture eliminator, thereby makes cement slurry enter suspended preheater with the state of sufficiently dry.
According to further advantageous embodiment of the present invention, when producing the starting stage of cement clinker, only at least a portion cement raw slurry is carried out spraying drying, till what has the dry cement raw material to deposit out in the front of suspended preheater.As everybody knows, when just beginning to produce cement, also do not have the dry cement raw material to utilize, and have only cement raw slurry.So will produce the dry cement raw material of capacity with a spray-dryer in the starting stage of producing.If necessary, even whole cement slurries can be carried out spray drying treatment,, directly be sent to suspended preheater then to produce the dry cement raw material.
Only need and will mix the dry formed cement slurry of a part of cement raw slurry and remaining cement raw slurry with spray drying treatment, just enough usually.Then this mixture is sent to the pneumatic conveying moisture eliminator.
Yet, should emphasize that as long as suspended preheater just can provide capacity dry cement raw material, spray-dryer just can be shut down.The dry cement raw material are drawn through suitable branch line, preferably from the highest preheat stage, draw, so, mix the dry cement raw material of this component by aforesaid method, then this mixture be sent to the pneumatic conveying moisture eliminator with the cement raw slurry of just having sent into.
According to the present invention, the equipment of implementing this method comprises:
A) drying plant of cement raw slurry,
B) a kind of suspended preheater of cyclone preheater form, it is made of a plurality of whirlwind levels, and its setting is, and one-level is on another level, gets up by the gentle pipe coupling of materail tube each other,
C) kiln, its material inlet end on the one hand be used for carrying preheating and at least in part the materail tube of burnt cement slurry link to each other, receive the minimum whirlwind level of cyclone preheater on the other hand by vapor pipe,
It is characterized in that it also has following feature:
D) at the inferior high whirlwind level of cyclone preheater and the tracheae between the highest whirlwind level, its structure is the form of pneumatic conveying moisture eliminator,
E) materail tube of receiving time high whirlwind level from the highest whirlwind level has an arm, and it leads to the mixing tank that is used for cement raw slurry and dry cement raw material, links to each other with the pneumatic conveying moisture eliminator by mixing tube in turn again.
Below will come the present invention is done more detailed explanation by means of accompanying drawing.This figure has represented to implement the preferable equipment synoptic diagram of method of the present invention.
The equipment that goes out shown in the figure comprises at first that usually a rotary kiln 1 makes roasting cement clinker usefulness, and what be placed in its back is conventional clinker cooler 2, and what be placed in the kiln front is suspended preheater, and it is a cyclone preheater 3 particularly.In described embodiment, this cyclone preheater 3 comprises 4 grades of whirlwind, they are positioned to one-level and are positioned on another level, promptly according to the flow direction of the cement slurry of wanting preheating from few top, the highest is the first whirlwind level, 3/ I, inferior high be the second whirlwind level, 3/ II and the 3rd whirlwind level 3/ III, and minimum be the 4th whirlwind level 3/ IV.Self-evident, in this Category Four cyclone each the level, in each case can be by a cyclonic separator or also can constitute by many cyclonic separators (by itself function as can be known).
The material inlet end 1a of rotary kiln 1 links to each other with materail tube 4 (feeding preheating and burnt at least in part cement slurry usefulness) on the one hand, links to each other with minimum whirlwind level 3/ IV of cyclone preheater 3 by vapor pipe 5 on the other hand.From whirlwind level 3/ I to whirlwind level 3/ IV (their one-levels are positioned on another level), also be to make at different levels itself linking to each other by the mode usually by materail tube and tracheae.
A feature of the present invention is, settling an adjustable branch road valve 7 from the highest whirlwind level 3/ I to the materail tube 6 of inferior high whirlwind level 2/ II, makes by arm 6a materail tube 6 to be received mixing tank 8, and this will describe in detail hereinafter.In addition, tracheae 9 between inferior high whirlwind level 3/ II and the highest whirlwind level 3/ I is made illustrated arc, it is enough big that this arcual size is wanted, and makes it form the pneumatic conveying moisture eliminator (its separator is exactly the highest whirlwind level 3/ I in this example) of sufficient size simultaneously.
From the flow direction of material, mixing tank 8 above-mentioned is placed in the cyclone preheater front, specifically, is the front in its highest whirlwind level 3/ I.This mixing tank 8 can be the mixing tank of any suitable mixing tank, especially belt stirrer.In this mixing tank, cement raw slurry and dry cement raw material that available pump is carried mix the moistening mixture of generation.
From the arm 6a that materail tube 6 is taken over, also have the carrier pipe 10 of a water flowing mud charge pulp to be connected except that above-mentioned at least, can release cement raw slurry to be processed from any cement raw slurry supply department by carrier pipe 10 with mixing tank 8.Then, receive the feed points 9a of pneumatic conveying moisture eliminator (tracheae 9) with mixed raw material pipe 11 from mixing tank 8, its installation requirement makes and guarantee to have sufficiently long dry distance in as the tracheae 9 of pneumatic conveying moisture eliminator.
As mentioned above, before the spray-dryer of just just operating in the initial stage of cement clinker production 12 also is placed in mixing tank 8.This spray-dryer 12 links to each other with cement raw slurry carrier pipe 10 on receiving mixing tank 8 through arm 13 on the one hand, and it also links to each other with mixing tank 8 by raw material pipe 14 on the other hand.For cement raw slurry all or part being branched away, arm 13 is linked to each other with carrier pipe 10 through adjustable bypass valve 15 from carrier pipe 10.
Spray-dryer can be built in a conventional way, carrying out the exsiccant cement raw slurry in spray-dryer, for example sprays in the hot gas flow from above.This strand hot gas flow is to send spray-dryer 12 from the hot gas generator 17 of another one and spray-dryer 12 cooperatings to through heating pipe 16.If necessary, also can be with dotting on the pipeline 18(figure) hot gas that this independent hot gas generator 17 is produced delivers in the tracheae 9 as the pneumatic conveying moisture eliminator and goes (downstream part that is preferably in feed points 9a adds).The vapor pipe 19 of drawing from spray-dryer 12 preferably leads to a unshowned emission-control equipment with the vapor pipe 20 of drawing from the highest whirlwind level 3/ I.
Mentioned above, the amount of the dry cement raw material of punishing out from bypass valve 7, make this cement slurry to generate in mixing tank 8 with cement raw slurry and be fit to the moistening mixture that the pneumatic conveying moisture eliminator is used, the water content of this compound can be approx between 5-10%.
According to above explanation, the effect of aforesaid device should be easy to do understand by means of diagram.Here only answer restock a bit: equipment component adds that rotary kiln 1, clinker cooler 2 and cyclone preheater 3 just can constitute a simple cement clinker roasting kiln device, perhaps in the material inlet end 1a of rotary kiln 1 and the zone between minimum whirlwind level 3/ IV, an independent preroasting equipment (from itself function as can be known) can be set also.For this purpose, as shown in the figure, an independent fuel feed pipe 21 and a tertiary air pipeline 22 of taking over from clinker cooler 2 can be arranged, link to each other with the vapor pipe 5 of rotary kiln.
Claims (8)
1, the method that the cement raw slurry of carrying from available pump is produced cement clinker, this method comprises, cement raw slurry is at first dried in hot gas becomes cement slurry, this cement slurry is used in a multistage suspended preheater from the next hot waste gas preheating of kiln, then with this preheating, burnt at least in part cement slurry is made cement clinker at roasting in kilns, it is characterized in that: at the cement clinker production period, a component of the dry cement raw material of preheating will be treated, want former fractions of the suspended preheater that first light passes through to extract from these cement slurries, these component dry cement raw material and cement raw slurry are mixed, again this mixture is used hot gas flow oven dry becoming cement slurry in the pneumatic conveying moisture eliminator from suspended preheater.
2, the method described in claim 1 is characterized in that, divides the dry cement raw material of drawing q.s, makes cement slurry and cement raw slurry form a kind of mixture that is suitable for the humidity of pneumatic conveying moisture eliminator together.
3, the method described in claim 1 is characterized in that, the initial period of producing at cement clinker only carries out spray drying treatment to part cement raw slurry at least, until the dry cement raw material in the front of suspended preheater till deposition is come out in what.
4, the method described in claim 3, it is characterized in that, the cement slurry that generated from part cement raw slurry drying with spray drying treatment and the rest part of this charge pulp are mixed, then this mixture is sent to the pneumatic conveying moisture eliminator.
5, the method described in claim 1 is characterized in that: part dry cement raw material are drawn between suspended preheater highest and second advanced.
6, for implementing the used equipment of method as claimed in claim 1, this equipment comprises:
A) drying plant of cement raw slurry (9,12),
B) suspended preheater of a kind of cyclone preheater (3) form, it is made of a plurality of whirlwind levels, and their setting is that one-level is on another level, gets up by the gentle pipe coupling of materail tube each other,
C) kiln (1), its material inlet end (1a) on the one hand be used for carrying preheating and at least in part the materail tube of burnt cement slurry (4) link to each other, receive the minimum whirlwind level (3/ IV) of cyclone preheater (3) on the other hand by vapor pipe (5)
It is characterized in that it also has following feature:
D) at the inferior high whirlwind level (3/ II) of cyclone preheater (3) and the tracheae (9) between the highest whirlwind level (3/ I), its structure is the form of pneumatic conveying moisture eliminator;
E) materail tube (6) of receiving time high whirlwind level (3/ II) from the highest whirlwind level (3/ I) has an arm (6a), it leads to the mixing tank (8) that is used for cement raw slurry and dry cement raw material, transmits moisture eliminator (9) by the mixing tube (11) and the qigong in turn again and links to each other.
7, the equipment described in claim 6, it is characterized in that, mixing tank (8) is arranged on spray-dryer (12) before, spray-dryer is only worked in the starting stage, it links to each other with the cement raw slurry feeder sleeve (10) that leads to mixing tank (8) by arm (13) on the one hand, receives mixing tank (8) by raw material pipe (14) on the other hand.
8, the equipment described in claim 7 is characterized in that, has an independent hot gas generator (17) to be connected with said spray-dryer (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873711145 DE3711145A1 (en) | 1987-04-02 | 1987-04-02 | Process and system for producing cement clinker from raw cement slurry |
| DEP3711145.0 | 1987-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN88101763A true CN88101763A (en) | 1988-10-19 |
Family
ID=6324732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198888101763A Pending CN88101763A (en) | 1987-04-02 | 1988-03-31 | Produce the method and apparatus of cement clinker from cement raw slurry |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN88101763A (en) |
| DE (1) | DE3711145A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039114C (en) * | 1990-05-15 | 1998-07-15 | 斯米德恩公司 | Method and apparatus for manufacture of clinker of mineral raw materials |
| CN106365480A (en) * | 2016-08-31 | 2017-02-01 | 浙江新业管桩有限公司 | Cement manufacturing technology |
| CN110557946A (en) * | 2018-04-04 | 2019-12-10 | 太平洋工程株式会社 | Organic sludge treatment device and treatment method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10323774A1 (en) * | 2003-05-26 | 2004-12-16 | Khd Humboldt Wedag Ag | Process and plant for the thermal drying of a wet ground cement raw meal |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2290068A (en) * | 1940-12-05 | 1942-07-14 | Smidth & Co As F L | Slurry drying |
| DE1083739B (en) * | 1956-06-02 | 1960-06-15 | Michel Elie Doumet | Process for the production of cement |
| DK142311B (en) * | 1973-01-05 | 1980-10-13 | Niro Atomizer As | Process for producing cement clinker of raw sludge and plant for carrying out the process. |
| DE2542087A1 (en) * | 1975-09-20 | 1977-03-31 | Kloeckner Humboldt Deutz Ag | PROCESS FOR THE PRODUCTION OF ECONOMICALLY USABLE, HOMOGENOUS RAW FLOUR MIXTURES |
| DE3311107A1 (en) * | 1983-03-26 | 1984-09-27 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Method and apparatus for the processing of raw materials for the manufacture of cement |
| DE3640794A1 (en) * | 1986-11-28 | 1988-06-01 | Kloeckner Humboldt Deutz Ag | Process and equipment for the manufacture of cement from moist raw materials |
-
1987
- 1987-04-02 DE DE19873711145 patent/DE3711145A1/en active Granted
-
1988
- 1988-03-31 CN CN198888101763A patent/CN88101763A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039114C (en) * | 1990-05-15 | 1998-07-15 | 斯米德恩公司 | Method and apparatus for manufacture of clinker of mineral raw materials |
| CN106365480A (en) * | 2016-08-31 | 2017-02-01 | 浙江新业管桩有限公司 | Cement manufacturing technology |
| CN110557946A (en) * | 2018-04-04 | 2019-12-10 | 太平洋工程株式会社 | Organic sludge treatment device and treatment method |
| CN114890649A (en) * | 2018-04-04 | 2022-08-12 | 太平洋工程株式会社 | Organic sludge treatment device and treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3711145C2 (en) | 1989-08-10 |
| DE3711145A1 (en) | 1988-10-13 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |