CN116697363A - Cement kiln co-treatment sludge device - Google Patents
Cement kiln co-treatment sludge device Download PDFInfo
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- CN116697363A CN116697363A CN202310866194.2A CN202310866194A CN116697363A CN 116697363 A CN116697363 A CN 116697363A CN 202310866194 A CN202310866194 A CN 202310866194A CN 116697363 A CN116697363 A CN 116697363A
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- 239000010802 sludge Substances 0.000 title claims abstract description 521
- 239000004568 cement Substances 0.000 title claims abstract description 115
- 238000011278 co-treatment Methods 0.000 title claims description 26
- 238000001514 detection method Methods 0.000 claims description 48
- 238000002485 combustion reaction Methods 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 27
- 235000012054 meals Nutrition 0.000 claims description 26
- 239000003245 coal Substances 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 13
- 239000000779 smoke Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002817 coal dust Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000003892 spreading Methods 0.000 description 5
- 230000007480 spreading Effects 0.000 description 5
- 238000005054 agglomeration Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- -1 that is Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/12—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating using gaseous or liquid fuel
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a device for cooperatively disposing sludge in a cement kiln, which comprises a sludge bin, a precombustor, a decomposing furnace, a smoke chamber, a conveying component and the cement kiln, wherein the precombustor is provided with a precombustor sludge inlet, a tertiary air inlet, a coal dust inlet and a precombustor outlet, the decomposing furnace is provided with a second sludge inlet, a decomposing furnace sludge inlet and a decomposing furnace outlet, the precombustor outlet is communicated with the decomposing furnace, the conveying component is used for conveying part of sludge in the sludge bin to the precombustor sludge inlet and the conveying component is used for conveying the other part of sludge in the sludge bin to the second sludge inlet and the decomposing furnace sludge inlet, the decomposing furnace outlet is connected with the lowest-level cyclone of a preheater system of a cement production line, the lowest-level cyclone is connected with the cement kiln, and sludge and cement raw materials are decomposed in the decomposing furnace, and cement clinker is calcined in the cement kiln. The device for cooperatively disposing the sludge in the cement kiln can fully burn the sludge and improve the burnout rate of the sludge.
Description
Technical Field
The invention relates to the technical field of sludge co-treatment by a cement kiln, in particular to a sludge co-treatment device by a cement kiln.
Background
The cement kiln co-treatment sludge technology is a common sludge treatment technology, and the basic principle of the cement kiln co-treatment sludge is that dried sludge and cement raw materials are calcined together into cement clinker in the cement kiln. The treatment technology takes the sludge as a part of the raw material of the cement, thereby realizing the reutilization of the sludge. However, in the prior art, the condition of insufficient combustion of the sludge is easy to occur, the burnout rate of the sludge in the whole treatment process is not high, the condition of a cement kiln is possibly deteriorated due to low burnout rate of the sludge, and the quality or the yield of the finally produced cement is affected.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a device for cooperatively disposing sludge in a cement kiln, which can reduce the risk of insufficient combustion of sludge and improve the burnout rate of the sludge.
According to an embodiment of the present invention, there is provided: the sludge bin is used for storing sludge to be treated; a precombustor for burning the sludge, the precombustor having a precombustor sludge inlet for letting the sludge into the decomposing furnace; a decomposing furnace for burning the sludge, the decomposing furnace being provided with a decomposing furnace sludge inlet for letting the sludge into the decomposing furnace and a decomposing furnace outlet for letting the sludge out of the decomposing furnace, the decomposing furnace being in communication with the prechamber so that the sludge out of the prechamber can enter the decomposing furnace; a transport assembly for passing a portion of the sludge in the sludge bin into the prechamber through the prechamber sludge inlet and for passing another portion of the sludge in the sludge bin into the decomposing furnace through the decomposing furnace sludge inlet; a cement kiln connected to the kiln outlet for allowing the sludge exiting the kiln to enter the kiln, the kiln for calcining the sludge and cement raw meal to cement clinker.
According to the embodiment of the invention, the method has at least the following beneficial effects:
in one of the technologies for co-disposing sludge in a cement kiln in the prior art, all sludge in a sludge bin is sent into a precombustor, and then the sludge leaving from the precombustor is sent into the cement kiln; however, the capacity of the precombustor is small and the temperature is low, and when the sludge treatment amount is large, the sludge is not sufficiently burned, and the sludge burnout rate is low. Another cement kiln co-treatment sludge technology in the prior art can directly send sludge in a sludge bin into a kiln tail smoke chamber; however, the sludge directly fed into the kiln tail smoke chamber is not subjected to pre-burning or heating, the water content of the sludge is high, the burnout rate of the sludge is low, the load of the cement kiln is increased, and the yield of cement clinker is reduced.
The device of the invention selects to send part of sludge in the sludge bin into the precombustor, the decomposing furnace and the cement kiln in sequence, and send the other part of sludge into the decomposing furnace directly and then into the cement kiln. Compared with the prior art that all sludge in the sludge bin is sent to the precombustor, the invention directly sends part of sludge in the sludge bin to the decomposing furnace, reduces the sludge required to be treated in the precombustor, and is beneficial to reducing the risk of insufficient sludge combustion. In addition, in the sludge finally entering the cement kiln, a part of sludge (precombustion sludge) is burnt in the precombustion chamber and the decomposing furnace in sequence, the burning time of the part of sludge is longer, the burnout rate of the part of sludge is higher, and correspondingly, the overall burnout rate of the sludge entering the cement kiln is also higher.
According to some embodiments of the invention, the sludge conveyed by the conveying assembly from the sludge bin to the prechamber sludge inlet is prechamber sludge, the sludge conveyed by the conveying assembly from the sludge bin to the decomposing furnace sludge inlet is non-prechamber sludge, and the feeding amount of the prechamber sludge is Q 1 The feeding amount of the non-precombustion sludge is Q 2 The delivery assembly is configured to: 0.6 (Q) 1 +Q 2 ）≤Q 1 ＜（Q 1 +Q 2 ）。
According to some embodiments of the invention, the decomposing furnace sludge inlet comprises a first sludge inlet and a second sludge inlet, the flow direction of the sludge in the decomposing furnace is a first flow direction, and the first sludge inlet and the second sludge inlet are sequentially arranged at intervals in the first flow direction.
According to some embodiments of the invention, the time required for the gas in the decomposing furnace to move from the first sludge inlet to the second sludge inlet is greater than 0.8 seconds.
According to some embodiments of the invention, a distance between the first sludge inlet and the second sludge inlet in the first flow direction is greater than 8 meters.
According to some embodiments of the invention, the first sludge inlet and the second sludge inlet are provided in two, and the two first sludge inlets are symmetrically arranged based on the central axis of the decomposing furnace.
According to some embodiments of the invention, clinker production of the cement kilnIn an amount of P 1 The feeding amount of the sludge of the single first sludge inlet is P 2 The feeding amount of the sludge of the single second sludge inlet is also P 2 ，0.005≤P 2 /P 1 ≤0.03。
According to some embodiments of the invention, two pre-chamber sludge inlets are provided, the two pre-chamber sludge inlets being symmetrically arranged based on the centre axis of the pre-chamber.
According to some embodiments of the invention, the cement kiln has a yield of P 1 The feeding amount of the sludge at the sludge inlet of the single precombustor is P 3 ，0.03≤P 3 /P 1 ≤0.05。
According to some embodiments of the invention, the cement kiln co-treatment sludge device further comprises a first detection assembly mounted to the decomposing furnace for detecting the temperature and pressure of the internal environment of the decomposing furnace, the first detection assembly being disposed downstream of the decomposing furnace sludge inlet; the conveying assembly is in communication connection with the first detection assembly, and the conveying assembly is used for adjusting the feeding amount of the sludge at the sludge inlet of the decomposing furnace according to the detection result of the first detection assembly.
According to some embodiments of the invention, the cement kiln co-treatment sludge device further comprises a second detection assembly mounted to the pre-chamber for detecting the temperature and pressure of the internal environment of the pre-chamber, the second detection assembly being arranged downstream of the pre-chamber sludge inlet; the conveying assembly is in communication connection with the second detection assembly, and the conveying assembly is used for adjusting the feeding amount of the sludge at the sludge inlet of the precombustor according to the detection result of the second detection assembly.
According to some embodiments of the invention, the cement kiln co-treatment sludge device further comprises a gas analyzer mounted at the decomposing furnace outlet for detecting an oxygen concentration and/or a carbon monoxide concentration at the decomposing furnace outlet; the conveying component is in communication connection with the gas analyzer, and is used for adjusting the feeding amount of the sludge at the sludge inlet of the precombustion chamber and/or the sludge inlet of the decomposing furnace according to the detection result of the gas analyzer.
According to some embodiments of the invention, the cement kiln co-treatment sludge device further comprises a tertiary air gate, wherein the tertiary air gate is in communication connection with the gas analyzer, and the tertiary air gate is used for adjusting the air quantity fed into the decomposing furnace according to the detection result of the gas analyzer.
According to some embodiments of the invention, the prechamber is further provided with a raw material feed for letting in the cement raw material into the prechamber, the flow direction of the sludge in the prechamber being a second flow direction, the raw material feed and the prechamber sludge inlet being arranged in sequence along the second flow direction, and the distance of the raw material feed and the prechamber sludge inlet in the second flow direction being more than 2 meters.
According to some embodiments of the invention, the pre-combustion chamber is further provided with a coal feeding port, the coal feeding port is used for allowing coal to enter the pre-combustion chamber, the flowing direction of the sludge in the pre-combustion chamber is a second flowing direction, the coal feeding port and the pre-combustion chamber sludge inlet are sequentially arranged along the second flowing direction, and the distance between the coal feeding port and the pre-combustion chamber sludge inlet in the second flowing direction is greater than 2 meters.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of a cement kiln co-treatment sludge device in one embodiment of the invention;
FIG. 2 is a simplified schematic diagram of the connection between the prechamber, decomposing furnace and cement kiln according to an embodiment of the invention.
Reference numerals:
101-device, 102-crusher, 103-third distributing valve, 104-sludge bin, 105-quantitative feeder, 106-first chain conveyor, 107-first distributing valve, 108-second chain conveyor, 109-first lower feeder, 110-first conveying pipe, 111-pneumatic shutter, 112-second conveying pipe, 113-second lower feeder, 114-decomposing furnace, 115-decomposing furnace sludge inlet, 116-first detecting component, 117-first sludge inlet, 118-second sludge inlet, 119-prechamber, 120-second detecting component, 121-prechamber sludge inlet, 122-raw material feeding port, 123-coal feeding port, 124-third air pipe, 125-gas analyzer, 127-cement kiln, 128-decomposing furnace outlet, 130-second distributing valve, 131-first spreader, 132-second spreader.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Fig. 1 shows a cement kiln co-treatment sludge apparatus in one embodiment of the present invention, and for convenience of description, hereinafter, the "cement kiln co-treatment sludge apparatus" will be simply referred to as "apparatus". The apparatus 101 includes a sludge bin 104, a prechamber 119, a decomposing furnace 114, a conveying assembly and a cement kiln 127. The cement kiln 127 is not shown in fig. 1, and the connection relationship among the prechamber 119, the decomposing furnace 114 and the cement kiln 127 can be referred to in fig. 2. The sludge bin 104 is used for storing sludge to be treated. In this embodiment, the sludge to be treated is dried sludge, that is, sludge with a water content of less than 40%. The transport assembly is used to transport the sludge in the sludge silo 104 to the prechamber 119 and the decomposing furnace 114, where the sludge can burn inside the prechamber 119, inside the decomposing furnace 114, and inside the cement kiln 127.
Referring to fig. 1, the prechamber 119 is provided with a prechamber sludge inlet 121, which prechamber sludge inlet 121 enables sludge to enter the interior of the prechamber 119. Referring to fig. 1, the decomposing furnace 114 is provided with a decomposing furnace sludge inlet 115 and a decomposing furnace outlet 128 (the decomposing furnace outlet 128 may be positioned as shown in fig. 2), the decomposing furnace sludge inlet 115 allows sludge to enter the decomposing furnace 114, and the decomposing furnace outlet 128 allows sludge to leave the decomposing furnace 114. Wherein, as shown in fig. 2, the bottom of the precombustor 119 communicates with the side of the decomposing furnace 114, and sludge leaving the precombustor 119 can enter the decomposing furnace 114. Referring to fig. 2, a cement kiln 127 is connected to a decomposing furnace outlet 128, and sludge exiting from the decomposing furnace 114 may enter the cement kiln 127. More specifically, the cement kiln 127 is connected to the decomposing furnace 114 through a preheater system lowest stage cyclone (not specifically shown) and a duct.
The transport assembly is used to transport a portion of the sludge in the sludge bin 104 to the prechamber sludge inlet 121 so that this portion of the sludge enters the prechamber 119 before it enters the decomposing furnace 114. The transport assembly also serves to transport another portion of the sludge in the sludge bin 104 to the decomposing furnace sludge inlet 115 such that this portion of the sludge directly enters the decomposing furnace 114. For convenience of description, sludge that first enters the prechamber 119 and then enters the decomposing furnace 114 will be hereinafter referred to as prechamber sludge, and sludge that directly enters the decomposing furnace 114 will be hereinafter referred to as non-prechamber sludge. After the precombustion sludge burns in the precombustion chamber 119, the precombustion sludge enters the decomposing furnace 114 to continue to burn; after combustion in the decomposing furnace 114, the pre-combustion sludge and the non-pre-combustion sludge leave the decomposing furnace 114 and enter the cement kiln 127. After the sludge enters the cement kiln 127, the sludge and cement raw materials are calcined together in the cement kiln 127 to cement clinker.
Referring to fig. 1, the transfer assembly includes a constant feeder 105, a first chain conveyor 106, a first distributing valve 107, a second chain conveyor 108, a second distributing valve 130, a first transfer pipe 110, a second transfer pipe 112, a first discharger 109, and a second discharger 113. The quantitative feeder 105 is arranged below the sludge bin 104, and the sludge in the sludge bin 104 is transferred to the quantitative feeder 105 after falling from the bottom of the sludge bin 104. The sludge is transferred from the dosing machine 105 onto the first chain conveyor 106, and the first chain conveyor 106 conveys the sludge to the inlet of the first distributing valve 107. A portion of the sludge entering the first distributing valve 107 falls to the second chain conveyor 108 after leaving the first distributing valve 107, and the second chain conveyor 108 conveys this portion of the sludge to the inlet of the first conveying pipe 110. The outlet of the first transfer pipe 110 is connected to a prechamber sludge inlet 121 of the prechamber 119, and the sludge transferred to the inlet of the first transfer pipe 110 subsequently flows along the first transfer pipe 110 towards the prechamber 119. The first blanking device 109 may in particular be provided as a rotary blanking device, the first blanking device 109 being mounted on the first conveying pipe 110. The first downer 109 acts as a pump, the first downer 109 being adapted to drive the sludge along the first transfer pipe 110 and to move the sludge to the prechamber sludge inlet 121, whereby the sludge enters the prechamber 119. The sludge moving along the first transfer pipe 110 to the prechamber 119 is a prechamber sludge. The second distributing valve 130 is arranged downstream of the first distributing valve 107, another part of the sludge entering the first distributing valve 107 after leaving the first distributing valve 107 moves to the second distributing valve 130, and this part of the sludge is split into two second conveying pipes 112 by the second distributing valve 130. The outlet of the second transfer pipe 112 is connected to a decomposing furnace sludge inlet 115 of a decomposing furnace 114. The second discharger 113 is installed on the second conveying pipe 112, the second discharger 113 may also be configured as a rotary discharger, and the second discharger 113 drives the sludge in the second conveying pipe 112 to move to the sludge inlet 115 of the decomposing furnace, thereby allowing the sludge to enter the decomposing furnace 114. The sludge moving along the second transfer pipe 112 to the decomposing furnace 114 is non-precombusted sludge.
The container for storing cement raw meal and the conveying line for conveying cement raw meal are not shown in the figures. The transport path of the cement raw meal is arranged differently, for example, the cement raw meal may be fed into the prechamber 119 and then sequentially through the decomposing furnace 114 and the cement kiln 127, the cement raw meal may also be fed into the decomposing furnace 114 and then to the cement kiln 127, and the cement raw meal may also be fed directly into the cement kiln 127. Referring to fig. 1 and 2, in this embodiment, the pre-chamber 119 is provided with a raw meal feed port 122 for letting cement raw meal into the pre-chamber 119, which is fed into the pre-chamber 119 before passing through the decomposing furnace 114 and finally to the cement kiln 127. That is, in this embodiment, the movement path of the cement raw meal is the same as that of the pre-combustion sludge. The arrangement is beneficial to fully mixing the cement raw material and the sludge in the flowing process of the cement raw material and the sludge; furthermore, this is advantageous in that the cement raw meal is heated during its flow in the prechamber 119 and the decomposing furnace 114, as well. Thus, the feeding of the cement raw meal into the prechamber 119 contributes to an improved mixing of the cement raw meal and the sludge and an increased reaction time of the cement raw meal, and thus to an improved quality of the cement produced by the device 101.
The power required for the flow of the sludge in the decomposing furnace 114 is mainly provided by the air flowing in the decomposing furnace, and the sludge particles flow with the air of the decomposing furnace 114, so that the sludge flows out of the decomposing furnace 114 and flows into the cement kiln 127.
In one of the technologies for co-disposing sludge in a cement kiln in the prior art, all sludge in a sludge bin is sent into a precombustor, and then the sludge leaving from the precombustor is sent into the cement kiln; however, the capacity of the precombustor is small and the temperature is low, and when the sludge treatment amount is large, the sludge is not sufficiently burned, and the sludge burnout rate is low. Another cement kiln co-treatment sludge technology in the prior art can directly send sludge in a sludge bin into a kiln tail smoke chamber; however, the sludge directly fed into the kiln tail smoke chamber is not subjected to pre-burning or heating, the water content of the sludge is high, the burnout rate of the sludge is low, the load of the cement kiln is increased, and the yield of cement clinker is reduced.
In the device of the invention, part of sludge in the sludge bin 104 is sequentially sent to the precombustor 119, the decomposing furnace 114 and the cement kiln 127, and the other part of sludge is directly sent to the decomposing furnace 114 and then sent to the cement kiln 127. Compared with the prior art that all sludge in the sludge bin is sent to the precombustor, the invention directly sends part of sludge in the sludge bin 104 to the decomposing furnace 114, so that the sludge required to be treated in the precombustor 119 is reduced, and the risk of insufficient sludge combustion is reduced. In addition, in the sludge finally entering the cement kiln 127, a part of sludge (pre-combustion sludge) is burned in the pre-combustion chamber 119 and the decomposing furnace 114 in sequence, the burning time of the part of sludge is long, the burnout rate of the part of sludge is high, and accordingly, the burnout rate of the whole of the sludge entering the cement kiln 127 is also high.
The apparatus 101 is further described below.
In fig. 1, two sludge bins 104 are provided, the number of conveying assemblies is the same as that of the sludge bins 104, and the two conveying assemblies are respectively used for conveying sludge in different sludge bins 104. In other embodiments, only one sludge bin 104 may be provided, the number of sludge bins 104 may be greater than two, and the number of conveying assemblies may be adjusted accordingly.
Referring to fig. 1, the apparatus 101 further comprises a crusher 102 and a third distributing valve 103, an inlet of the third distributing valve 103 is connected to an outlet of the crusher 102, and two outlets of the third distributing valve 103 are connected to two sludge bins 104, respectively. The crusher 102 is used to crush the sludge and reduce the size of the sludge particles. After being crushed by the crusher 102, the dried sludge enters two sludge bins 104 through a third distributing valve 103 respectively. Too large a sludge particle size increases the agglomeration risk of the sludge, affecting the treatment of the sludge. In the combustion process, after the combustion heat release, the coarse sludge particles may adhere to the adjacent fine sludge particles, so that larger-sized sludge particles are formed, and the large-sized abnormal-particle sludge is easy to settle, thereby affecting the stability of a sludge firing system. Thus, crushing the sludge by the crusher 102 is beneficial to reducing the size of the sludge particles, fully dispersing the sludge, and reducing the risk of caking and sedimentation of the sludge during combustion. More specifically, in order to make the particles of the sludge have a smaller particle size, the sludge crushed by the crusher 102 may be set to: sludge particles with the granularity smaller than 5mm account for more than 90 percent.
Referring to fig. 1, in order to reduce the risk of sludge agglomeration, the conveying assembly further includes a first spreader 131 and a second spreader 132. The first spreader 131 is installed at the decomposing furnace sludge inlet 115, and non-precombusted sludge enters the decomposing furnace 114 through the first spreader 131. A second spreader 132 is installed at the prechamber sludge inlet 121, and prechamber sludge enters the prechamber 119 through the second spreader 132. In the case where the decomposing furnace sludge inlets 115 are provided in plurality, the number of the first spreaders 131 is the same as the number of the decomposing furnace sludge inlets 115, and one first spreader 131 is installed for each decomposing furnace sludge inlet 115. Similarly, in case that the prechamber sludge inlets 121 are provided in plurality, the number of the second spreaders 132 is the same as the number of the prechamber sludge inlets 121, and one second spreader 132 is installed for each prechamber sludge inlet 121. The first spreader 131 comprises a spreading box, a compressed air flow-assisting device and an angle-adjustable spreading plate, wherein the spreading plate and the compressed air flow-assisting device are arranged in the spreading box, and the spreading plate can scatter sludge, so that the sludge fed into the decomposing furnace 114 is scattered, and the risk of sludge agglomeration is reduced; the compressed air flow-aiding device sweeps accumulated sludge into the decomposing furnace 114 through high-pressure gas for combustion, so that the feeding speed of sludge particles is increased, and the space dispersion degree of the sludge in the decomposing furnace 114 is enhanced. Similarly, the second spreader 132 can spread out the sludge fed into the prechamber 119, reducing the risk of sludge caking.
In one embodimentFor the sludge flowing out of the same sludge bin 104, the feeding amount of the precombusted sludge is Q 1 (i.e., the flow rate of the sludge at the precombustor sludge inlet 121), the feed rate of the non-precombustor sludge is Q 2 (i.e., the flow rate of sludge at the decomposing furnace sludge inlet 115), and Q 1 And Q 2 The method meets the following conditions: 0.6 (Q) 1 +Q 2 ）≤Q 1 ＜（Q 1 +Q 2 ). The reaction time of the precombustion sludge is longer, the burnout rate of the precombustion sludge is higher, and the ratio of the precombustion sludge to the precombustion sludge is 0.6 (Q 1 +Q 2 ）≤Q 1 This arrangement prevents the pre-combustion cement from having too low a proportion, and thus the overall burnout rate of the sludge in the apparatus 101. In the present invention, the feeding amount is understood to be the flow rate of the sludge.
Referring to fig. 1, in an embodiment, a plurality of decomposing furnace sludge inlets 115 are provided, and if the flow direction of sludge in the decomposing furnace 114 is a first flow direction, at least two decomposing furnace sludge inlets 115 are provided at intervals in the first flow direction. Thus, the layered combustion of the sludge can be realized, the risk that the sludge is gathered near the sludge inlet 115 of a certain decomposing furnace is reduced, and the burnout rate of the sludge is improved. For example, as shown in fig. 1, the decomposing furnace sludge inlet 115 includes a first sludge inlet 117 and a second sludge inlet 118, and the first sludge inlet 117 and the second sludge inlet 118 are disposed in this order in the first flow direction. In addition, as shown in fig. 1, the first sludge inlet 117 and the second sludge inlet 118 are provided with two, so that the sludge feeding amount of the single first sludge inlet 117 and the single second sludge inlet 118 is not excessively high, which is also beneficial to reducing the risk of sludge being accumulated near a certain decomposing furnace sludge inlet 115 and improving the burnout rate of the sludge. In addition, in fig. 1, two first sludge inlets 117 and two second sludge inlets 118 are respectively arranged, the two first sludge inlets 117 are symmetrically arranged based on the central axis of the decomposing furnace 114, and the two second sludge inlets 118 are symmetrically arranged based on the central axis of the decomposing furnace 114, so that uniform distribution of sludge in the decomposing furnace 114 is facilitated, and the risk of sludge aggregation is reduced. In other embodiments, the number of first sludge inlets 117 and second sludge inlets 118 may be greater, and the number of distribution layers of the decomposing furnace sludge inlets 115 may be greater.
The first flow direction is explained below. The apparatus 101 further includes a blower that feeds air (blower and duct not shown) required for combustion of sludge into the decomposing furnace 114 through a duct installed at the bottom of the decomposing furnace 114. The air flows from bottom to top in the decomposing furnace 114, and sludge (particles) and other substances in the decomposing furnace 114 are mixed with the air in the decomposing furnace 114 and flow from bottom to top with the air. Thus, if fig. 1 is taken as an example, the first flow direction is a bottom-up direction, and the adjacent sludge inlets 115 of the decomposing furnace are arranged at intervals in the vertical direction.
Adjusting the blower power may vary the flow rate of the gas (primarily flue gas) within the decomposing furnace 114. In one embodiment, for two decomposing furnace sludge inlets 115 that are disposed at intervals in the first flow direction and adjacent to each other: the time required for the gas in the decomposing furnace 114 to move from one decomposing furnace sludge inlet 115 to the other decomposing furnace sludge inlet 115 is greater than 0.8 seconds. This is arranged so that the sludge stays in the decomposing furnace 114 for a long time, thereby enabling the sludge to sufficiently react.
More specifically, in an embodiment, the distance between the first sludge inlet 117 and the second sludge inlet 118 is greater than 8 meters in the first flow direction. The wind speed (gas flow rate) in the decomposing furnace 114 is 8-10m/s, and considering that the moving speed of the solid phase material (e.g., sludge particles) in the decomposing furnace 114 is one third of the moving speed of the gas phase material, the distance between the first sludge inlet 117 and the second sludge inlet 118 is greater than 8 m, the moving time of the sludge particles between the two inlet sites can be ensured to be greater than 3 seconds, so that the sludge stays in the decomposing furnace 114 for a longer time.
Similarly, in other embodiments, the plurality of prechamber sludge inlets 121 may also be arranged in multiple layers (and each layer may be provided with a plurality of prechamber sludge inlets 121), with at least two prechamber sludge inlets 121 being arranged at intervals in the second flow direction to achieve stratified combustion of sludge in the prechamber 119, avoiding sludge accumulation near a single prechamber sludge inlet 121. The second flow direction refers to the flow direction of the sludge (precombustion sludge) in the precombustion chamber 119, taking fig. 1 as an example, the device 101 further comprises a tertiary air pipe 124, air is sent into the precombustion chamber 119 from the tertiary air pipe 124, the tertiary air pipe 124 is installed at the top of the precombustion chamber 119, the air and the sludge flow from top to bottom in the precombustion chamber 119, and the second flow direction is the top to bottom direction. And, the distance between the two prechamber sludge inlets 121 arranged at intervals along the second flow direction may also be more than 8 meters to ensure a long residence time of the sludge in the prechamber 119, so that the sludge is fully reacted.
In addition, in fig. 1, two precombustor sludge inlets 121 are provided, and the two precombustor sludge inlets 121 are symmetrically arranged based on the central axis of the precombustor 119, so that uniform distribution of sludge in the precombustor 119 is facilitated, and the risk of sludge aggregation and agglomeration is reduced.
In the case where a plurality of decomposing furnace sludge inlets 115 are provided, the clinker yield in the cement kiln 127 is denoted as P 1 And the sludge feeding amount of the single decomposing furnace sludge inlet 115 is recorded as P 2 (the sludge feeding amount of the single first sludge inlet 117 and the sludge feeding amount of the single second sludge inlet 118 are both P 2 ) Then P 1 And P 2 Can satisfy the following conditions: p is more than or equal to 0.005 2 /P 1 Less than or equal to 0.03. This advantageously allows the sludge throughput of the apparatus 101 and the burnout rate of the sludge to be at a high level. Specifically, if P 2 ＜0.005P 1 Then the feed amount of sludge from the single decomposing furnace sludge inlet 115 is too low and the sludge handling amount of the whole apparatus 101 is low; if P 2 ＞0.03P 1 The feeding amount of the sludge of the single decomposing furnace sludge inlet 115 is excessively high, the concentration of the sludge is high near the decomposing furnace sludge inlet 115, and the insufficient combustion of the sludge is liable to occur, thereby causing the excessively low burnout rate of the sludge and the deterioration of the kiln conditions of the cement kiln 127.
Similarly, in the case where the prechamber sludge inlets 121 are provided in plurality, if the sludge feeding amount of the single prechamber sludge inlet 121 is denoted as P 3 Then P 1 And P 3 Can satisfy the following conditions: p is more than or equal to 0.03 3 /P 1 ≤0.05. This advantageously allows the sludge throughput of the apparatus 101 and the burnout rate of the sludge to be at a high level.
P is the same as 1 Refers to the yield of cement clinker in a certain period of time, P 2 Refers to the total amount of sludge, P, passing through the single decomposing furnace sludge inlet 115 over the same period of time 3 Refers to the total amount of sludge passing through a single prechamber sludge inlet 121 over the same period of time. For example, 6000 tons of cement clinker can be produced by continuous operation of the apparatus 101 for one day, and accordingly the total amount of sludge passing from the single decomposing furnace sludge inlet 115 during one day is between 30 tons and 180 tons and the total amount of sludge passing from the single prechamber sludge inlet 121 during one day is between 180 tons and 300 tons.
Referring to fig. 1, the prechamber 119 is provided with a raw meal feed port 122, the raw meal feed port 122 being used for letting cement raw meal into the prechamber 119. In the second flow direction (corresponding to the top-down direction in fig. 1), the raw material feeding port 122 and the pre-chamber sludge inlet 121 are arranged at intervals in sequence, and the distance between the raw material feeding port 122 and the pre-chamber sludge inlet 121 in the second flow direction is more than 2 meters. This has the advantage that the raw meal feed port 122 is located upstream of the prechamber sludge inlet 121 and that a larger distance is provided between the prechamber sludge inlet 121 and the raw meal feed port 122, whereby the influence of the heat of decomposition and absorption of carbonates in the cement raw meal on the combustion of the sludge just after the cement raw meal has entered the prechamber 119 is reduced.
Referring to fig. 1, the pre-chamber 119 is further provided with a coal feeding port 123, the coal feeding port 123 being for letting coal into the pre-chamber 119. In the second flow direction (corresponding to the top-down direction in fig. 1), the coal feeding port 123 and the precombustor sludge inlet 121 are sequentially arranged at intervals, and the distance between the coal feeding port 123 and the precombustor sludge inlet 121 in the second flow direction is greater than 2 meters. This has the advantage that the coal feed opening 123 can be arranged upstream of the prechamber sludge inlet 121 and that a larger distance between the coal feed opening 123 and the prechamber sludge inlet 121 is provided. Therefore, the pulverized coal can not contact with excessive sludge in the process of starting up, and the pulverized coal is more smoothly started up.
The operating state of the device 101 can also be adjusted according to the internal environment of the decomposing furnace 114 and/or the precombustor 119, so as to ensure that the internal working conditions of the decomposing furnace 114 and/or the precombustor 119 are stable and controllable. The following is a specific example.
Referring to fig. 1, the apparatus 101 includes a first detection assembly 116, the first detection assembly 116 being mounted on the decomposing furnace 114, the first detection assembly 116 being disposed downstream of the decomposing furnace sludge inlet 115, the first detection assembly 116 being configured to detect the temperature and pressure of the internal environment of the decomposing furnace 114. Wherein, "the first detecting assembly 116 is disposed downstream of the decomposing furnace sludge inlet 115" means that the decomposing furnace sludge inlet 115 and the first detecting assembly 116 are disposed in this order along the first flow direction. Specifically, the first detection assembly 116 includes a temperature sensor and a pressure sensor. The conveying component is in communication connection with the first detecting component 116 in a wired or wireless mode, and the conveying component adjusts the feeding amount of the sludge at the sludge inlet 115 of the decomposing furnace and/or the sludge inlet of the precombustor according to the detection result of the first detecting component 116 so as to ensure that the working condition in the decomposing furnace 114 is integrally and stably controlled.
For example, when the internal temperature of the decomposing furnace 114 is higher than the preset temperature, the operation power of the second discharger 113 of the conveying assembly is reduced, so that the flow speed of the sludge in the second conveying pipe 112 is reduced, and the feeding amount of the sludge entering the decomposing furnace 114 through the decomposing furnace sludge inlet 115 is reduced, thereby ensuring that the working condition in the decomposing furnace 114 is controlled in a stable manner as a whole. For another example, when the internal temperature of the decomposing furnace 114 is higher than the preset temperature, the conveying speed of the first chain conveyor 106 of the conveying assembly is lowered, so that the feeding amount of the sludge entering the decomposing furnace 114 through the decomposing furnace sludge inlet 115 is lowered. Similarly, when the internal pressure of the decomposing furnace 114 is higher than the preset pressure, it is possible that the sludge burns to form a crust, and at this time, the operation power of the first chain conveyor 106 or the second discharger 113 may be adjusted to reduce the feeding amount of the sludge, thereby treating the crust.
Referring to fig. 1, in the case where a plurality of decomposing furnace sludge inlets 115 are provided, one first detecting unit 116 is provided downstream of each decomposing furnace sludge inlet 115. Thus, a first sensing assembly 116 is used to sense the temperature and pressure in the vicinity of the corresponding digester sludge inlet 115. When the detection result of a certain first detection component 116 is abnormal, the conveying component adjusts the feeding amount of the sludge at the sludge inlet 115 of the decomposing furnace corresponding to the first detection component 116.
Similarly, as shown in fig. 1, the apparatus 101 further comprises a second detection assembly 120, the second detection assembly 120 being mounted on the prechamber 119, the second detection assembly 120 being arranged downstream of the prechamber sludge inlet 121. Wherein "the second detection assembly 120 is arranged downstream of the prechamber sludge inlet 121" means that the prechamber sludge inlet 121 and the second detection assembly 120 are arranged in sequence along the second flow direction. The second detection assembly 120 may also comprise a temperature sensor and a pressure sensor, the second detection assembly 120 being adapted to detect the temperature and the pressure of the internal environment of the prechamber 119. The conveying component is in communication connection in a wired or wireless mode, and is used for adjusting the feeding amount of the sludge at the precombustor sludge inlet 121 according to the detection result of the second detection component 120. When the temperature and/or pressure of the internal environment of the prechamber 119 is too high, the feed of sludge at the prechamber sludge inlet 121 can be reduced. Specifically, the feeding amount of the sludge at the prechamber sludge inlet 121 can be reduced by reducing the running speed or power of any of the first chain conveyor 106, the second chain conveyor 108 and the first tripper 109.
In case that a plurality of precombustor sludge inlets 121 are provided, one second detecting assembly 120 is provided downstream of each precombustor sludge inlet 121. Thus, a second detection assembly 120 is used to detect the temperature and pressure in the vicinity of the corresponding prechamber sludge inlet 121. When the detection result of a certain second detection assembly 120 is abnormal, the conveying assembly adjusts the feeding amount of the sludge at the one prechamber sludge inlet 121 corresponding to the second detection assembly 120.
Referring to fig. 2, the apparatus 101 further includes a gas analyzer 125, the gas analyzer 125 being mounted at the decomposition furnace outlet 128, the gas analyzer 125 for detecting at least one of an oxygen concentration and a carbon monoxide concentration at the decomposition furnace outlet 128. The conveying component is in communication connection with the gas analyzer 125 in a wired or wireless manner, and the conveying component adjusts the feeding amount of the sludge at the sludge inlet 115 of the decomposing furnace according to the detection result of the gas analyzer 125. The gas analyzer 125 can determine the combustion conditions in the decomposing furnace 114 by detecting the composition of the gas at the decomposing furnace outlet 128, and the amount of the sludge fed at the decomposing furnace sludge inlet 115 is adjusted according to the combustion conditions, which is advantageous for keeping the conditions in the decomposing furnace 114 stable. For example, if the actual value of the oxygen concentration at the decomposing furnace outlet 128 is lower than the preset value of the oxygen concentration and the actual value of the carbon monoxide concentration is higher than the preset value of the carbon monoxide concentration, the sludge in the decomposing furnace 114 may be excessive, the sludge is insufficiently burned, and the burnout rate of the sludge may be low; at this time, it is possible to select to reduce the feeding amount of sludge at least one of the decomposing furnace sludge inlet 115 and the prechamber sludge inlet 121, thereby reducing the total amount of sludge in the decomposing furnace 114. Thus, the ratio between the sludge in the decomposing furnace 114 and the air and pulverized coal is appropriate, and the sludge in the decomposing furnace 114 can be sufficiently burned. How the conveyor assembly reduces the feeding of sludge at the decomposing furnace sludge inlet 115 and at the prechamber sludge inlet 121 has been exemplified above and is not repeated here.
In addition, the apparatus 101 further includes a tertiary air shutter (not shown) which may be installed on the tertiary air pipe, the tertiary air shutter being communicatively connected to the gas analyzer 125, the tertiary air shutter being for adjusting the amount of air fed into the decomposing furnace 114 according to the detection result of the gas analyzer 125 so as to increase the burnout rate of sludge in the decomposing furnace 114. For example, when the oxygen concentration at the outlet of the decomposing furnace 114 is too low and the concentration of carbon monoxide is too high, the oxygen in the decomposing furnace 114 may be insufficient, resulting in insufficient sludge combustion; at this time, the flow rate of the air fed into the decomposing furnace 114 may be increased to increase the oxygen content in the decomposing furnace 114, thereby enabling the sludge in the decomposing furnace 114 to be sufficiently burned.
Referring to fig. 1, the transfer assembly further includes air shutters 111, each of the first transfer pipes 110 and each of the second transfer pipes 112 having the air shutters 111 mounted thereon. When the apparatus 101 is operating normally, the air shutter 111 is in an open state and sludge can pass through the first and second transfer pipes 110 and 112. When the blower is abnormally stopped, the air shutter 111 may be switched to a closed state, thereby stopping feeding to the prechamber 119 and the decomposing furnace 114, so as not to lose control of the working conditions in the prechamber 119 and the decomposing furnace 114.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (15)
1. Cement kiln handles mud device in coordination, its characterized in that includes:
the sludge bin is used for storing sludge to be treated;
a precombustor for combusting the sludge, the precombustor having a precombustor sludge inlet for letting the sludge into the precombustor;
a decomposing furnace for burning the sludge, the decomposing furnace being provided with a decomposing furnace sludge inlet for letting the sludge into the decomposing furnace and a decomposing furnace outlet for letting the sludge out of the decomposing furnace, the decomposing furnace being in communication with the prechamber so that the sludge out of the prechamber can enter the decomposing furnace;
a transport assembly for passing a portion of the sludge in the sludge bin into the prechamber through the prechamber sludge inlet and for passing another portion of the sludge in the sludge bin into the decomposing furnace through the decomposing furnace sludge inlet;
a cement kiln connected to the kiln outlet for allowing the sludge exiting the kiln to enter the kiln, the kiln for calcining the sludge and cement raw meal to cement clinker.
2. The cement kiln co-disposal sludge apparatus as claimed in claim 1, wherein the sludge conveyed from the sludge bin to the pre-chamber sludge inlet by the conveying means is pre-combustion sludge, the sludge conveyed from the sludge bin to the decomposing furnace sludge inlet by the conveying means is non-pre-combustion sludge, and the feeding amount of the pre-combustion sludge is Q 1 The feeding amount of the non-precombustion sludge is Q 2 The delivery assembly is configured to: 0.6 (Q) 1 +Q 2 ）≤Q 1 ＜（Q 1 +Q 2 ）。
3. The cement kiln co-treatment sludge device of claim 1, wherein the decomposing furnace sludge inlet comprises a first sludge inlet and a second sludge inlet, the flow direction of the sludge in the decomposing furnace is a first flow direction, and the first sludge inlet and the second sludge inlet are sequentially arranged at intervals in the first flow direction.
4. A cement kiln co-disposal sludge device according to claim 3, wherein the time required for the gas in the decomposing furnace to move from the first sludge inlet to the second sludge inlet is greater than 0.8 seconds.
5. A cement kiln co-treatment sludge device as claimed in claim 3, wherein the distance between the first sludge inlet and the second sludge inlet in the first flow direction is greater than 8 meters.
6. A cement kiln co-treatment sludge device as claimed in claim 3, wherein two first sludge inlets and two second sludge inlets are provided, the two first sludge inlets being symmetrically arranged based on a central axis of the decomposing furnace.
7. A cement kiln co-treatment sludge device according to any of claims 3 to 6, characterised in that the clinker yield of the cement kiln is P 1 The feeding amount of the sludge of the single first sludge inlet is P 2 The feeding amount of the sludge of the single second sludge inlet is also P 2 ，0.005≤P 2 /P 1 ≤0.03。
8. The cement kiln co-treatment sludge device of claim 1, wherein two pre-chamber sludge inlets are provided, the two pre-chamber sludge inlets being symmetrically arranged based on a central axis of the pre-chamber.
9. The cement kiln co-treatment sludge device of claim 1, wherein the cement kiln has a yield of P 1 The feeding amount of the sludge at the sludge inlet of the single precombustor is P 3 ，0.03≤P 3 /P 1 ≤0.05。
10. The cement kiln co-treatment sludge device of claim 1, further comprising a first detection assembly mounted to the decomposing furnace for detecting a temperature and a pressure of an internal environment of the decomposing furnace, the first detection assembly being disposed downstream of the decomposing furnace sludge inlet;
the conveying assembly is in communication connection with the first detection assembly, and the conveying assembly is used for adjusting the feeding amount of the sludge at the sludge inlet of the decomposing furnace according to the detection result of the first detection assembly.
11. The cement kiln co-treatment sludge device of claim 1, further comprising a second detection assembly mounted to the pre-chamber for detecting the temperature and pressure of the internal environment of the pre-chamber, the second detection assembly being disposed downstream of the pre-chamber sludge inlet;
the conveying assembly is in communication connection with the second detection assembly, and the conveying assembly is used for adjusting the feeding amount of the sludge at the sludge inlet of the precombustor according to the detection result of the second detection assembly.
12. The cement kiln co-treatment sludge device of claim 1, further comprising a gas analyzer mounted at the decomposing furnace outlet for detecting an oxygen concentration and/or a carbon monoxide concentration at the decomposing furnace outlet;
the conveying component is in communication connection with the gas analyzer, and is used for adjusting the feeding amount of the sludge at the sludge inlet of the precombustion chamber and/or the sludge inlet of the decomposing furnace according to the detection result of the gas analyzer.
13. The cement kiln co-treatment sludge device according to claim 12, further comprising a tertiary air shutter communicatively connected to the gas analyzer, the tertiary air shutter being configured to adjust an amount of air fed into the decomposing furnace according to a detection result of the gas analyzer.
14. The cement kiln co-treatment sludge device as claimed in claim 1, wherein the pre-chamber is further provided with a raw meal feed port for letting in the cement raw meal into the pre-chamber, the flow direction of the sludge in the pre-chamber is a second flow direction, the raw meal feed port and the pre-chamber sludge inlet are arranged in sequence along the second flow direction, and the distance between the raw meal feed port and the pre-chamber sludge inlet in the second flow direction is greater than 2 meters.
15. The device for cooperatively disposing sludge in a cement kiln according to claim 1 or 14, wherein the pre-combustion chamber is further provided with a coal feeding port for allowing coal to enter the pre-combustion chamber, the flow direction of the sludge in the pre-combustion chamber is a second flow direction, the coal feeding port and the pre-combustion chamber sludge inlet are sequentially arranged along the second flow direction, and the distance between the coal feeding port and the pre-combustion chamber sludge inlet in the second flow direction is greater than 2 meters.
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| CN202310866194.2A CN116697363A (en) | 2023-07-14 | 2023-07-14 | Cement kiln co-treatment sludge device |
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| CN217677230U (en) * | 2022-07-15 | 2022-10-28 | 合肥水泥研究设计院有限公司 | Cement kiln cooperative disposal system for crushing, coupling, distributing and feeding large-volume dried sludge into furnace |
| CN218811426U (en) * | 2022-10-28 | 2023-04-07 | 广州市越堡水泥有限公司 | Municipal mummification mud device is dealt with in coordination to cement kiln |
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| JP2006342046A (en) * | 2005-05-13 | 2006-12-21 | Taiheiyo Cement Corp | Cement burning apparatus and waste treatment method |
| US20100307390A1 (en) * | 2009-06-08 | 2010-12-09 | Flsmidth A/S | Method and Apparatus for Incineration of Combustible Waste |
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