CN114234201B - Dry slag discharging device for dangerous waste incineration - Google Patents
Dry slag discharging device for dangerous waste incineration Download PDFInfo
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- CN114234201B CN114234201B CN202111415160.9A CN202111415160A CN114234201B CN 114234201 B CN114234201 B CN 114234201B CN 202111415160 A CN202111415160 A CN 202111415160A CN 114234201 B CN114234201 B CN 114234201B
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- 239000002893 slag Substances 0.000 title claims abstract description 125
- 238000007599 discharging Methods 0.000 title abstract description 22
- 238000004056 waste incineration Methods 0.000 title description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 239000002918 waste heat Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 239000013049 sediment Substances 0.000 claims abstract description 3
- 239000000498 cooling water Substances 0.000 claims description 37
- 239000012528 membrane Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000002920 hazardous waste Substances 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/04—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks
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- 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
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/10—Combustion in two or more stages
- F23G2202/103—Combustion in two or more stages in separate chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/20—Rotary drum furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
- F23J2700/003—Ash removal means for incinerators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The application discloses a dry process sediment device that arranges for dangerously useless burning, the device includes: cooling the slag discharge tank and the waste heat recovery system; the cooling slag discharge tank comprises a cylinder body, an upper disc, a middle disc, a lower disc, a middle shaft, an upper cavity spiral, a middle cavity spiral, a lower cavity scraper and a discharging opening; the upper cavity spiral and the middle cavity spiral are used for enabling slag falling into the cylinder to fall into the lower disc, and the lower cavity scraper is used for enabling slag to be output from the feed opening; the waste heat recovery system includes: the water supply distributor, the low-temperature water distributor, the high-temperature water distributor and the steam drum are used for recovering waste heat of slag in the cylinder body through water; the high-temperature hot water distributor is used for converting high-temperature water into a steam-water mixture and outputting water vapor in the steam-water mixture through a steam drum. The rotary kiln incineration system solves the technical problems that in a rotary kiln incineration system in the prior art, slag cannot be discharged from the bottom of a secondary combustion chamber by a dry method, and effective waste heat in slag is effectively utilized.
Description
Technical Field
The application relates to the technical field of hazardous waste incineration, and relates to a dry slag discharging device for hazardous waste incineration.
Background
At present, in the hazardous waste incineration technology, primary slag is mostly discharged by adopting a wet slag extractor, the slag discharge mode occupies small area, the sealing of materials in a shell can be realized, dust flying is prevented, and the defect that a large amount of waste water and unorganized waste gas are generated in the slag discharge process is overcome. The dry slag discharging method can avoid the defect of the wet slag discharging process, and can fully utilize the waste heat of ash slag to achieve the energy-saving effect.
In order to realize the dry slag discharging function, a dry slag discharging device is required to be designed, so that slag can be fully cooled in the dry slag discharging device, and the device has high enough heat energy utilization efficiency, so that the waste heat of the slag can be fully utilized. In the prior art, the following dry deslagging devices are proposed: the patent CN208779462U proposes a roller cooler for cooling ash, which greatly increases the heat transfer area through roller fins and water pipe fins, better transfers the heat of ash, plays a guiding effect on the removal of ash, and improves the capability of a disposal system. The patent CN211373274U proposes a two-section slag cooler which can realize dry slag discharge, prevent equipment acid corrosion and reduce water waste; meanwhile, the two-stage cooling has high heat energy recovery efficiency, and high-temperature steam generated by the cooler can be conveyed to downstream users for use. Patent CN206157108U proposes a dry slag discharging system, which consists of a rotary feeder, a high-pressure slag hopper, a variable-pressure slag hopper, a normal-pressure slag hopper, a cold slag tank and the like, wherein the slag discharging system is used for discharging slag of a gasification furnace; in the system, the cold slag tank and the refrigerating unit are arranged between the gasification furnace and the rotary feeder, and the high-temperature and high-pressure ash slag generated by the gasification furnace firstly enters the cold slag tank, so that the refrigerating unit is utilized to cool the ash slag in the cold slag tank, and the cooled ash slag enters the rotary feeder again, thereby avoiding the abrasion of the rotary feeder. The patent CN212246917U proposes a dry slag discharging system, which mainly comprises a cooling slag hopper, wherein the cooling slag hopper is used for receiving ash discharged by a pressurized fluidized bed gasifier and cooling the ash, the whole system can realize rapid cooling and decompression of the ash in the fluidized bed gasifier, and the separation of coarse ash and fine ash is realized according to a ash type grading continuous discharging system.
Disclosure of Invention
The technical problem that this application solved is: in the existing rotary kiln incineration system, the bottom of the secondary combustion chamber cannot realize dry deslagging, and the effective waste heat in slag is effectively utilized. The application provides a dry method sediment device that arranges for dangerously burn, among the scheme that this application embodiment provided, the water of cooling slag flows in jackshaft, the hollow structure of last cavity spiral, the hollow structure of well cavity spiral and the diaphragm type wall of barrel, and export the steam pocket with the vapor after the heating, whole cooling process in-process, the water of slag and cooling slag can not direct contact, but carry out heat exchange formation and discharge steam through waste heat recovery system output cooling water and slag, avoid the output of waste gas and waste water. In the rotary kiln incineration system, the heat of the slag is released rapidly in a mechanical conveying and mechanical stirring mode, and the waste heat of the slag is effectively utilized in a reasonable heat exchange surface and reasonable steam-water distribution mode, so that the discharge of the unstructured waste gas and waste water caused by wet slag discharge is avoided, and the effects of energy conservation and emission reduction are achieved.
In a first aspect, embodiments of the present application provide a dry slag discharging device for hazardous waste incineration, disposed at the bottom of a secondary combustion chamber, the device comprising: the cooling slag discharge tank comprises a barrel, an upper disc, a middle disc, a lower disc, a middle shaft, an upper cavity spiral, a middle cavity spiral, a lower cavity scraper and a discharging opening; the upper disc, the middle disc and the lower disc are arranged in the cylinder body and are parallel to the cross section of the cylinder body, and the upper disc, the middle disc and the lower disc are used for dividing the cylinder body into an upper cavity, a middle cavity and a lower cavity; the middle shaft penetrates through the upper disc and the middle disc along the central axis of the cylinder; the upper cavity spiral is used for enabling slag falling into the upper cavity to fall into the middle cavity, the middle cavity spiral is used for enabling slag falling into the middle cavity to fall into the lower cavity, and the lower cavity scraper and the blanking port are both arranged on the lower disc and used for enabling slag falling into the lower cavity to be output from the blanking port; wherein the membrane wall of the cylinder, the upper cavity spiral and the middle cavity spiral are hollow structures;
the waste heat recovery system includes: the device comprises a water supply distributor, a low-temperature water distributor, a high-temperature water distributor and a steam drum, wherein the water supply distributor is used for inputting cooling water into the intermediate shaft and the intermediate cavity spiral through a water pipe; the low-temperature water distributor is used for inputting low-temperature water output from the intermediate shaft and the middle cavity spiral into the upper cavity spiral; the high-temperature water distributor is used for inputting high-temperature water output by the upper cavity body in the membrane wall of the cylinder body in a spiral mode, converting the high-temperature water into a steam-water mixture, wherein steam in the steam-water mixture enters a steam drum for output, and water in the steam-water mixture returns to the high-temperature water distributor through a water pipeline to form circulation so as to cool slag falling into the cylinder body.
Optionally, the upper cavity spiral comprises a first upper cavity spiral and a second upper cavity spiral which are oppositely arranged along the intermediate shaft; the middle cavity spiral comprises a first middle cavity spiral and a second middle cavity spiral which are oppositely arranged along the middle shaft.
Optionally, the first upper cavity spiral, the second upper cavity spiral, the first middle cavity spiral, and the second middle cavity spiral all include: a rotary joint, a cooling water inlet, a cooling water outlet and a screw, wherein the rotary joint is used for providing end sealing of a cooling water circulation loop from an inlet to an outlet, and the screw is used for controlling slag falling into the upper cavity or the middle cavity to move on the upper disc or the middle disc; the cooling water inlet is used for inputting cooling water into the hollow structure, and the cooling water outlet is used for outputting water in the hollow structure.
Optionally, the spiral body comprises a first section of rotating body and a second section of rotating body, wherein the first section of rotating body and the second section of rotating body take the central axis of the spiral body as a dividing line, and the rotation directions of the first section of rotating body and the second section of rotating body are opposite.
Optionally, at least one opening is arranged in the center of the upper disc; the screw body in the upper cavity screw is used for controlling slag falling into the upper cavity to move from outside to inside along the upper disc and fall into the middle cavity from the at least one opening.
Optionally, a gap is arranged between the middle disc and the inner wall of the cylinder; the spiral body in the middle cavity spiral is used for controlling slag falling into the middle cavity to move from inside to outside along the middle disc and fall into the lower cavity from the gap.
Optionally, the outer diameter of the spiral body in the upper cavity spiral and the middle cavity spiral is not smaller than 320mm.
Optionally, the intermediate shaft has a double-layer structure and comprises an inner layer and an outer layer, wherein the cooling water flows in from the inner layer and flows out from the outer layer, or the cooling water flows in from the outer layer and flows out from the inner layer.
Optionally, the upper disc and the middle disc are fixed on the intermediate shaft, and the tensile strength of the intermediate shaft is not less than 167MPa.
Optionally, the length of the lower cavity scraper should be not less than the diameter of the lower disc and less than the inner diameter of the cylinder.
Optionally, a gap exists between the lower cavity scraper and the lower disc, and the value range of the gap is (1 mm,3 mm).
Compared with the prior art, the scheme provided by the embodiment of the application has at least the following beneficial effects:
in the scheme provided by the embodiment of the application, cooling water is input into the intermediate shaft and the hollow structure of the middle cavity spiral through the water supply distributor so as to absorb heat of slag falling into the middle cavity, so that the temperature of the slag is reduced and low-temperature hot water is obtained; and low-temperature hot water is input into the hollow structure of the upper cavity spiral through the low-temperature hot water distributor to absorb heat of slag falling into the upper cavity, so that the temperature of the slag is reduced, high-temperature hot water is obtained, the slag is cooled, and the slag is output through the blanking opening after being cooled. Further, high-temperature hot water is uniformly distributed into the membrane wall of the inner wall of the cylinder body through the high-temperature hot water distributor, the high-temperature hot water is converted into a steam-water mixture in the membrane wall, and steam in the steam-water mixture is output through the steam drum. In the dry slag discharging device, water for cooling slag flows in a middle shaft, a hollow structure of an upper cavity spiral, a hollow structure of a middle cavity spiral and a film wall of a cylinder body, heated water vapor is output from a steam drum, and in the whole cooling process, the slag and the water for cooling the slag are not in direct contact, but the cooling water is output through a waste heat recovery system to exchange heat with the slag to generate and discharge the vapor, so that the output of waste gas and waste water is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a dry slag discharging device for hazardous waste incineration according to an embodiment of the present application;
FIG. 2 is a schematic flow diagram of a cooling slag in a slag discharge tank according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an upper cavity spiral or a middle cavity spiral according to an embodiment of the present disclosure;
fig. 4 is a schematic three-dimensional structure of an upper cavity spiral or a middle cavity spiral according to an embodiment of the present application.
Reference numerals: 1-cooling a slag discharge tank; 2-a waste heat recovery system; 11-a cylinder; 12-upper disc; 13-a middle disc; 14-a lower disc; 15-an intermediate shaft; 16-upper cavity spiral; 17-middle cavity spiral; 18-lower cavity scraper; 19-a feed opening; 21-a feed water distributor; 22-low temperature hot water dispenser; 23-high temperature hot water dispenser; 24-steam drum; 161-first upper cavity spiral; 162-second upper cavity spiral; 171-first middle cavity spiral; 172-a second middle cavity spiral; 101-a rotary joint; 102-cooling water inlet; 103-a cooling water outlet; 104-helix; 1041-a first section of rotating body; 1042-second section rotator.
Detailed Description
In the solutions provided by the embodiments of the present application, the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In order to better understand the technical solutions described above, the following detailed description of the technical solutions of the present application is provided through the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present application are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features of the embodiments and embodiments of the present application may be combined with each other without conflict.
Referring to fig. 1, a schematic structural diagram of a dry slag discharging device for hazardous waste incineration is provided in an embodiment of the present application. In fig. 1, the apparatus includes: the cooling slag discharge tank 1 and the waste heat recovery system 2, wherein the cooling slag discharge tank 1 comprises a cylinder 11, an upper disc 12, a middle disc 13, a lower disc 14, a middle shaft 15, an upper cavity spiral 16, a middle cavity spiral 17, a lower cavity scraper 18 and a feed opening 19; wherein the upper disc 12, the middle disc 13 and the lower disc 14 are arranged inside the cylinder 11 and are parallel to the cross section of the cylinder 11, and are used for dividing the cylinder 11 into an upper cavity, a middle cavity and a lower cavity; the middle shaft 15 penetrates through the upper disc 12 and the middle disc 13 along the central axis of the cylinder 11; an upper cavity screw 16 for allowing slag falling into the upper cavity to fall into the middle cavity, the middle cavity screw 17 for allowing slag falling into the middle cavity to fall into the lower cavity, the lower cavity scraper 18 and the feed opening 19 both being provided on the lower disc 14 for allowing slag falling into the lower cavity to be output from the feed opening 19; wherein the membrane wall of the cylinder 11, the upper cavity spiral 16 and the middle cavity spiral 17 are hollow structures;
the waste heat recovery system 2 includes: a feed water distributor 21, a low temperature hot water distributor 22, a high temperature hot water distributor 23 and a steam drum 24, wherein the feed water distributor 21 is used for inputting cooling water into the intermediate shaft 15 and the intermediate cavity spiral 17 through a water pipe; the low-temperature water dispenser 22 for inputting low-temperature water outputted from the intermediate shaft 15 and the middle cavity screw 17 into the upper cavity screw 16; the high-temperature water distributor 23 is configured to input high-temperature water output from the upper cavity spiral 16 into the membrane wall of the cylinder 11, and convert the high-temperature water into a steam-water mixture, wherein steam in the steam-water mixture enters the steam drum 24 and is output, and water in the steam-water mixture returns to the high-temperature water distributor 23 through a water pipeline to form a circulation, so that slag falling into the cylinder 11 is cooled.
Specifically, in the solution provided in the embodiment of the present application, the cooling slag discharge tank 1 is composed of a barrel 11, an upper disc 12, a middle disc 13, a lower disc 14, a middle shaft 15, an upper cavity screw 16, a middle cavity screw 17, a lower cavity scraper 18, a feed opening 19, and the like. The cylinder 11 is divided into three cavities, namely an upper cavity, a middle cavity and a lower cavity, by an upper disc 12, a middle disc 13 and a lower disc 14. Further, a through hole is opened at the center of the upper and middle disks 12 and 13, an intermediate shaft 15 penetrates the upper and middle disks 12 and 13 through the through hole, and the upper and middle disks 12 and 13 can rotate along the intermediate shaft 15. Specifically, reference is made to the schematic structural diagram of the cooling slag ladle 1 indicated by the dashed box arrow in fig. 1.
For ease of understanding, a brief description will be given of the movement of slag in the cooling slag pot 1.
First, slag falls from the rotary kiln into the upper cavity in the barrel 11, moves on the upper disc 12 under the action of the upper cavity screw 16 and falls into the middle cavity; then, the slag moves on the middle disc 13 in the middle cavity under the action of the middle cavity spiral 17 and falls into the lower cavity; the slag is then discharged in the lower chamber by the lower chamber doctor blade 18 through the discharge opening 19. The dry slag discharging device further comprises a discharging screw, for example, which conveys the cooled slag output from the feed opening 19 into the slag conveyor.
In the scheme provided by the embodiment of the application, since a great amount of heat is carried when the slag is discharged from the rotary kiln, in order to recover the heat of the slag, the slag needs to be subjected to heat recovery in the process of moving in the cooling slag discharge tank 1. By way of example, the present embodiment provides a waste heat recovery system 2 for recovering heat from slag, the principle of which is as follows:
specifically, in the solution provided in the embodiment of the present application, the barrel wall of the barrel 11 is a film wall, and the insides of the upper cavity spiral 16 and the middle cavity spiral 17 are hollow structures. The waste heat recovery system 2 is composed of a water supply distributor 21, a low-temperature hot water distributor 22, a high-temperature hot water distributor 23, a steam drum 24 and the like. Cooling water from the outside uniformly enters the hollow structures of the intermediate shaft 15 and the intermediate cavity spiral 17 through the water supply distributor 21, and is converted into low-temperature hot water after primary preheating and enters the low-temperature hot water distributor 22; the low-temperature hot water dispenser 22 distributes low-temperature hot water uniformly into the hollow structure of the upper cavity spiral 16, and becomes high-temperature hot water after secondary preheating to enter the high-temperature hot water dispenser 23; the high-temperature hot water distributor 23 distributes the high-temperature hot water uniformly into the membrane wall of the inner wall of the cylinder 11, and the high-temperature hot water is converted into a steam-water mixture in the membrane wall and then enters the steam drum 24; the steam in the drum 24 is sent to the end user through a steam pipe or is integrated into a steam pipe network, and the water is returned to the high-temperature hot water dispenser 23 through a water pipe to form a circulation. By way of example, the water distributor 21 is in communication with the intermediate shaft 15 and the middle cavity screw 17 via a water pipe, and the low-temperature hot water distributor 22 is also in communication with the upper cavity screw 16 via a water pipe, and the high-temperature hot water distributor 23 is also in communication with the membrane wall of the inner wall of the cylinder 11 via a water pipe. Therefore, in the scheme provided in the embodiment of the present application, cooling water is input into the hollow structures of the intermediate shaft 15 and the middle cavity spiral 17 through the water supply distributor 21 to absorb heat of slag falling into the middle cavity, so that the temperature of slag is reduced and low-temperature hot water is obtained; further, low-temperature hot water is inputted into the hollow structure of the upper cavity screw 16 through the low-temperature hot water dispenser 22 to absorb heat of slag falling into the upper cavity, so that the temperature of slag is lowered and high-temperature hot water is obtained, cooling of slag is further achieved, and the slag is outputted through the feed opening 19 after being cooled. Referring to fig. 2, a schematic flow diagram of a slag in a cooling slag discharge tank is provided in an embodiment of the present application.
Further, in the solution provided in the embodiment of the present application, the high-temperature hot water distributor 23 distributes the high-temperature hot water uniformly into the membrane wall of the inner wall of the cylinder 11, where the high-temperature hot water is converted into a steam-water mixture, and then into the steam drum 24; the steam in the drum 24 is sent to the end user through a steam pipe or is integrated into a steam pipe network, and the water is returned to the high-temperature hot water dispenser 23 through a water pipe to form a circulation. That is, in the dry slag discharging device, the water for cooling the slag flows through the intermediate shaft 15, the hollow structure of the upper cavity screw 16, the hollow structure of the middle cavity screw 17 and the film wall of the cylinder 11, and the heated water vapor is output from the steam drum 24, and in the whole cooling process, the water for cooling the slag and the slag is not in direct contact, but the cooling water is output through the waste heat recovery system 2 to exchange heat with the slag to generate and discharge the vapor, thereby avoiding the output of waste gas and waste water. By way of example, the dry deslagging device is arranged at the bottom of the secondary combustion chamber.
In one possible implementation, the upper cavity spiral 16 includes a first upper cavity spiral 161 and a second upper cavity spiral 162 disposed opposite along the intermediate shaft 15; the middle cavity spiral 17 includes a first middle cavity spiral 171 and a second middle cavity spiral 172 disposed opposite along the intermediate shaft 15.
In the solution provided in the embodiment of the present application, two pairs of spirals are arranged in the upper cavity and the middle cavity and are closely attached to the disc, wherein the upper cavity spiral 16 includes a first upper cavity spiral 161 and a second upper cavity spiral 162 oppositely arranged along the intermediate shaft 15, and the middle cavity spiral 17 includes a first middle cavity spiral 171 and a second middle cavity spiral 172 oppositely arranged along the intermediate shaft 15. In the upper cavity, a first upper cavity spiral 161 and a second upper cavity spiral 162 are provided at both sides of the intermediate shaft 15; in the middle cavity, the first middle cavity spiral 171 and the second middle cavity spiral 172 are also disposed at two sides of the middle shaft 15, and the distance between the first upper cavity spiral 161 and the second upper cavity spiral 162 and the middle shaft 15 is smaller than the distance between the first middle cavity spiral 171 and the second middle cavity spiral 172 and the middle shaft 15.
Referring to fig. 3 and 4, in one possible implementation, the first upper cavity spiral 161, the second upper cavity spiral 162, the first middle cavity spiral 171, and the second middle cavity spiral 172 each include: a rotary joint 101, a cooling water inlet 102, a cooling water outlet 103 and a screw 104, wherein the rotary joint 101 is used for providing end sealing of a cooling water circulation loop from an inlet to an outlet, and the screw 104 is used for controlling slag falling into the upper cavity or the middle cavity to move on the upper disc 12 or the middle disc 13; the cooling water inlet 102 is used for inputting cooling water to the hollow structure, and the cooling water outlet 103 is used for outputting water in the hollow structure.
In one possible implementation, the spiral body 104 includes a first segment rotation body 1041 and a second segment rotation body 1042, where the first segment rotation body 1041 and the second segment rotation body 1042 are separated by a central axis of the spiral body 104 and are opposite in rotation direction.
In the solution provided in the embodiment of the present application, water is input into the hollow structure of the upper cavity spiral 16 or the middle cavity spiral 17 through the cooling water inlet 102, flows in the hollow structure of the upper cavity spiral 16 or the middle cavity spiral 17, and flows out through the cooling water outlet 103. In addition, the upper cavity screw 16 and the middle cavity screw 17 may be rotated by the rotary joint 101 controller to move slag falling into the upper cavity or the middle cavity on the upper disk 12 or the middle disk 13. Further, the upper cavity spiral 16 and the middle cavity spiral 17 respectively include two spirals that are divided by a central axis and are rotated in opposite directions.
In one possible implementation, the upper disc 12 is provided with at least one opening in a central position; the screw 104 in the upper cavity screw 16 serves to control the movement of slag falling into the upper cavity from the outside to the inside along the upper disc 12 and from the at least one opening into the middle cavity.
Specifically, in the solution provided in the embodiment of the present application, at least one opening may be a circular opening, or may be an opening with another shape, because the upper cavity spiral 16 is formed by combining two sections of spirals with opposite directions, the upper cavity spiral 16 may be driven by a motor (not labeled in the drawing) to operate (such as rotate), and when in operation, slag in the upper cavity may be moved from the outer ring to the inner ring, so that slag falls into the middle cavity from at least one opening.
In one possible implementation, a gap is provided between the middle disc 13 and the inner wall of the cylinder 11; the screw 104 in the middle cavity screw 17 is used to control slag falling into the middle cavity to move from inside to outside along the middle disc 13 and to fall into the lower cavity from the gap.
Specifically, in the solution provided in the embodiments of the present application, the diameter of the middle disc 13 is smaller than the cross-sectional diameter of the cylinder 11, and as an example, the diameters of the upper disc 12 and the lower disc 14 are larger than the diameter of the middle disc 13 and smaller or slightly smaller than the cross-sectional diameter of the cylinder 11. Therefore, a gap exists between the middle disc 13 and the inner wall of the cylinder 11, and since the middle cavity spiral 17 is formed by combining two spiral sections with opposite spiral directions, the middle cavity spiral 17 can be driven by a motor (not labeled in the figure) to operate (such as rotate), and slag in the middle cavity can move from the inner ring to the outer ring during operation, so that slag falls into the lower cavity from the gap between the middle disc 13 and the inner wall of the cylinder 11. The bottom of the lower cavity is provided with a lower cavity scraper 18 which rotates along with the intermediate shaft 15, and the lower cavity scraper 18 can scrape slag falling from the intermediate cavity to a feed opening of the lower disc 14. The inner wall of the cylinder 11 is a membrane wall.
Further, in one possible implementation, the outer diameter of the screw body 104 in the upper cavity screw 16 and the middle cavity screw 17 is not less than 320mm.
Further, in one possible implementation, the intermediate shaft 15 has a double-layer structure including an inner layer and an outer layer, and the cooling water flows in from the inner layer and flows out from the outer layer, or the cooling water flows in from the outer layer and flows out from the inner layer.
Further, in one possible implementation manner, the upper disc 12 and the middle disc 13 are fixed on the intermediate shaft 15, and the tensile strength of the intermediate shaft 15 is not less than 167MPa.
By way of example, the material of the intermediate shaft 15 should have a tensile strength (167 MPa) at 800 ℃ that is not lower than the heat-resistant cast iron RQTAl5Si 5.
Further, in one possible implementation, the length of the lower cavity scraper 18 should be no less than the diameter of the lower disc 14 and less than the inner diameter of the barrel 11. By way of example, the length of the lower cavity scraper 18 is valued between the diameter of the lower disc 14 and the inner diameter of the barrel 11.
Further, in one possible implementation, a gap exists between the lower cavity scraper 18 and the lower disc 14, and the gap has a value in the range of (1 mm,3 mm).
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (8)
1. A dry method sediment device that arranges for dangerously useless burning sets up in two combustion chamber bottoms, its characterized in that includes: a cooling slag discharge tank (1) and a waste heat recovery system (2), wherein,
the cooling slag discharge tank (1) comprises a cylinder body (11), an upper disc (12), a middle disc (13), a lower disc (14), a middle shaft (15), an upper cavity spiral (16), a middle cavity spiral (17), a lower cavity scraper (18) and a feed opening (19); the upper disc (12), the middle disc (13) and the lower disc (14) are arranged inside the cylinder (11) and are parallel to the cross section of the cylinder (11) and are used for dividing the cylinder (11) into an upper cavity, a middle cavity and a lower cavity; the middle shaft (15) penetrates through the upper disc (12) and the middle disc (13) along the central axis of the cylinder (11); an upper cavity spiral (16) for enabling slag falling into the upper cavity to fall into the middle cavity, the middle cavity spiral (17) for enabling slag falling into the middle cavity to fall into the lower cavity, and the lower cavity scraper (18) and the blanking port (19) are arranged on the lower disc (14) and are used for enabling slag falling into the lower cavity to be output from the blanking port (19); wherein the membrane wall of the cylinder body (11), the upper cavity spiral (16) and the middle cavity spiral (17) are hollow structures;
the waste heat recovery system (2) comprises: a feed water distributor (21), a low temperature hot water distributor (22), a high temperature hot water distributor (23) and a steam drum (24), wherein the feed water distributor (21) is used for inputting cooling water into the intermediate shaft (15) and the intermediate cavity spiral (17) through a water pipe; the low-temperature water dispenser (22) is used for inputting low-temperature water output from the intermediate shaft (15) and the middle cavity spiral (17) into the upper cavity spiral (16); the high-temperature water distributor (23) is used for inputting high-temperature water output from the upper cavity spiral (16) into a membrane wall of the cylinder (11) and converting the high-temperature water into a steam-water mixture, wherein water vapor in the steam-water mixture enters a steam drum (24) to be output, and water in the steam-water mixture returns to the high-temperature water distributor (23) through a water pipeline to form circulation so as to cool slag falling into the cylinder (11);
the upper cavity spiral (16) comprises a first upper cavity spiral (161) and a second upper cavity spiral (162) which are oppositely arranged along the intermediate shaft (15);
the middle cavity spiral (17) comprises a first middle cavity spiral (171) and a second middle cavity spiral (172) which are oppositely arranged along the middle shaft (15);
the first upper cavity spiral (161), the second upper cavity spiral (162), the first middle cavity spiral (171) and the second middle cavity spiral (172) all comprise: a swivel (101), a cooling water inlet (102), a cooling water outlet (103) and a screw (104), wherein the swivel (101) is used for providing end sealing of a cooling water from inlet to outlet circulation loop, and the screw (104) is used for controlling slag in the upper cavity or the middle cavity to move on the upper disc (12) or the middle disc (13); the cooling water inlet (102) is used for inputting cooling water into the hollow structure, and the cooling water outlet (103) is used for outputting water in the hollow structure;
a through hole is formed in the center of the upper disc (12) and the middle disc (13), an intermediate shaft (15) penetrates through the upper disc (12) and the middle disc (13) through the through hole, and the upper disc (12) and the middle disc (13) rotate along the intermediate shaft (15).
2. The device of claim 1, wherein the screw (104) comprises a first section of rotation body (1041) and a second section of rotation body (1042), wherein the first section of rotation body (1041) and the second section of rotation body (1042) are separated by a central axis of the screw (104) and are rotated in opposite directions.
3. The device according to claim 2, characterized in that the upper disc (12) is provided with at least one opening in a central position;
the screw (104) in the upper cavity screw (16) is used for controlling slag falling into the upper cavity to move from outside to inside along the upper disc (12) and fall into the middle cavity from the at least one opening.
4. The device according to claim 2, characterized in that a gap is provided between the middle disc (13) and the inner wall of the cylinder (11);
the screw body (104) in the middle cavity screw (17) is used for controlling slag falling into the middle cavity to move from inside to outside along the middle disc (13) and fall into the lower cavity from a gap.
5. The device according to any one of claims 1 to 4, wherein the external diameter of the screw (104) in the upper cavity screw (16) and the middle cavity screw (17) is not less than 320mm.
6. A device according to any one of claims 1-4, characterized in that the intermediate shaft (15) has a double-layer structure comprising an inner layer and an outer layer, the cooling water flowing in from the inner layer and out from the outer layer, or the cooling water flowing in from the outer layer and out from the inner layer.
7. The device according to claim 6, wherein the upper disc (12) and the middle disc (13) are fixed on the intermediate shaft (15), and the intermediate shaft (15) is made of a material with tensile strength not less than 167MPa.
8. The device according to claim 7, characterized in that the length of the lower cavity scraper (18) is not smaller than the diameter of the lower disc (14) and smaller than the inner diameter of the cylinder (11).
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202109504U (en) * | 2011-06-09 | 2012-01-11 | 成都天牛能源技术有限公司 | Drum type inner scraper slag cooler |
| CN202118929U (en) * | 2011-06-10 | 2012-01-18 | 上海帆旺电力设备制造有限公司 | Multilayer disc type series-connection slag cooler |
| JP2012057228A (en) * | 2010-09-10 | 2012-03-22 | Nippon Steel Corp | Method for treating high temperature slag |
| CN203605246U (en) * | 2013-11-11 | 2014-05-21 | 安徽科达洁能股份有限公司 | Helical slag extractor |
| CN107803045A (en) * | 2017-11-09 | 2018-03-16 | 四川理工学院 | Reciprocal turn over scrapes formula heating negative pressure separator |
| CN108411054A (en) * | 2018-02-26 | 2018-08-17 | 西安交通大学 | A kind of mobile bed apparatus for recycling high temperature bulk material sensible heat |
| CN109612286A (en) * | 2018-12-10 | 2019-04-12 | 东北大学 | A kind of vanadium slag waste heat recycling system and its application method |
| CN112066350A (en) * | 2020-09-14 | 2020-12-11 | 山东迪尔节能科技有限公司 | High-temperature slag waste heat recovery system |
| CN212841549U (en) * | 2020-06-19 | 2021-03-30 | 德阳劲达节能科技有限责任公司 | Tower-shaped membrane type slag cooler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1856681A (en) * | 2003-09-26 | 2006-11-01 | 株式会社荏原制作所 | Noncombustible extraction system and fluidized bed furnace system |
-
2021
- 2021-11-25 CN CN202111415160.9A patent/CN114234201B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012057228A (en) * | 2010-09-10 | 2012-03-22 | Nippon Steel Corp | Method for treating high temperature slag |
| CN202109504U (en) * | 2011-06-09 | 2012-01-11 | 成都天牛能源技术有限公司 | Drum type inner scraper slag cooler |
| CN202118929U (en) * | 2011-06-10 | 2012-01-18 | 上海帆旺电力设备制造有限公司 | Multilayer disc type series-connection slag cooler |
| CN203605246U (en) * | 2013-11-11 | 2014-05-21 | 安徽科达洁能股份有限公司 | Helical slag extractor |
| CN107803045A (en) * | 2017-11-09 | 2018-03-16 | 四川理工学院 | Reciprocal turn over scrapes formula heating negative pressure separator |
| CN108411054A (en) * | 2018-02-26 | 2018-08-17 | 西安交通大学 | A kind of mobile bed apparatus for recycling high temperature bulk material sensible heat |
| CN109612286A (en) * | 2018-12-10 | 2019-04-12 | 东北大学 | A kind of vanadium slag waste heat recycling system and its application method |
| CN212841549U (en) * | 2020-06-19 | 2021-03-30 | 德阳劲达节能科技有限责任公司 | Tower-shaped membrane type slag cooler |
| CN112066350A (en) * | 2020-09-14 | 2020-12-11 | 山东迪尔节能科技有限公司 | High-temperature slag waste heat recovery system |
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