CN108555003B - Ash processing method and device - Google Patents
Ash processing method and device Download PDFInfo
- Publication number
- CN108555003B CN108555003B CN201810533390.7A CN201810533390A CN108555003B CN 108555003 B CN108555003 B CN 108555003B CN 201810533390 A CN201810533390 A CN 201810533390A CN 108555003 B CN108555003 B CN 108555003B
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- Prior art keywords
- ash
- water
- torrent
- ditch
- slag
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
- C10J2300/1628—Ash post-treatment
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a clinker processing method and a device, the method is that the clinker of a clinker ditch is flushed into a clinker pool by high-pressure water generated by a torrent nozzle array, the precipitated clinker is carried away after being filtered, most of the generated clinker is supplied to the torrent nozzle array to form water circulation, and water can be supplied to a coal supply trestle and a gasification furnace expansion condenser according to the requirement, and the redundant clinker is biochemically processed after being filtered; and discharging ash steam generated in the ash ditch, wherein the pressure generated by the torrent nozzle array is sequentially reduced along with the moving direction of ash in the ash ditch; the device comprises: the gasification furnace comprises a gasification furnace vertical ash pipe, a boiler ash chute, an ash slag ditch with a sealing cover plate, a three-stage settling mechanism, a coal supply stack bridge, an expansion condenser and a filtering mechanism. The invention effectively solves the problem of environmental pollution in the synthetic ammonia gasification furnace and boiler ash discharge process, realizes the standard discharge of ash water, and ensures the normal operation of the gasification furnace, the boiler and the subsequent water treatment system of the company.
Description
Technical Field
The invention belongs to the technical field of coal synthetic ammonia gasification furnaces and boiler ash treatment systems, and relates to an ash treatment method and an ash treatment device.
Background
In large enterprises producing nitro compound fertilizer by using coal to produce synthetic ammonia, a synthetic ammonia gas making furnace and a matched boiler are used as main devices, and ash slag generated by the gas making furnace and the boiler must be reasonably treated and can be discharged. The gas-making furnace ash and slag of part of enterprises adopts a spiral slag extractor and a belt conveyor to form a slag extractor system, and the boiler ash and slag are directly conveyed to a slag yard in a factory through an automobile. In the production process, the operation reliability of the spiral slag extractor is found to be poor, and the dust emission of the boiler slag in the transportation process greatly influences the environmental sanitation; the ash treatment system is further improved by enterprises, a hydraulic ash flushing system is designed in a matched manner, but through long-term production practice, due to the lack of further treatment of ash water and ash steam, imperfect design of ash ditch positions and the like, the system exposes a plurality of problems, and not only affects the normal operation of boilers, gasifiers and subsequent water treatment systems, but also causes serious environmental pollution.
Disclosure of Invention
In order to solve the problem of environmental pollution in the existing synthetic ammonia gasification furnace and boiler ash discharge process, the invention discloses an ash treatment method and an ash treatment device, which effectively solve the problem of environmental pollution in the synthetic ammonia gasification furnace and boiler ash discharge process, realize the standard discharge of ash water and ensure the normal operation of a company gasification furnace, a boiler and a subsequent water treatment system.
The technical scheme of the invention is realized as follows:
on one hand, the invention discloses a method for treating ash, which is characterized in that ash in an ash ditch is flushed into a slag sedimentation tank by high-pressure water generated by a torrent nozzle array, precipitated ash is transported away after being filtered, most of the generated ash is supplied to the torrent nozzle array to flush the ash in the ash ditch into the slag sedimentation tank by the high-pressure water generated by the torrent nozzle array, most of the precipitated ash is transported away after being filtered, most of the generated ash is supplied to the torrent nozzle array to form water circulation, water is supplied to a coal supply trestle and an expansion condenser according to requirements, and the redundant ash is biochemically treated after being filtered; and discharging ash steam generated in the ash ditch, wherein the pressure generated by the torrent nozzle array is sequentially reduced along with the moving direction of ash in the ash ditch.
On the other hand, the invention also discloses an ash processing device, which comprises: the device comprises a gasification furnace vertical ash pipe for receiving gasification furnace ash, a boiler ash chute for receiving boiler ash, an ash ditch with a sealing cover plate, a three-stage settling mechanism, a coal supply stack bridge, an expansion condenser and a filtering mechanism; the ash ditch is internally provided with a torrent nozzle array, the ash ditch sealing cover plate is provided with a first ash inlet communicated with an ash pipe of the gasification furnace and a second ash inlet communicated with an ash chute of the boiler, and the side wall or the bottom of the ash ditch is provided with a steam outlet communicated with an ash removal steam facility; the three-stage sedimentation mechanism is composed of a slag basin, a sedimentation basin and a clean water basin which are sequentially arranged, wherein the slag basin is communicated with a slag hole of the slag ditch, an ash water outlet connected with a water pump is arranged at the bottom of the clean water basin, a water pump water outlet is communicated with an ash flushing pipeline through a first pipeline, the ash flushing pipeline is communicated with a water inlet of the torrent nozzle array, a water pump water outlet is communicated with a coal supply stack bridge through a second pipeline, a water outlet of the coal supply stack bridge is communicated with the slag ditch, a water pump water outlet is communicated with an expansion condenser through a third pipeline, and a water pump water outlet is connected with a water treatment biochemical system through a filtering mechanism. The ash removing steam facility consists of two fans and corresponding pipelines.
As a preferred embodiment, the filter means consist of a microporous ceramic filter assembly and/or a self-cleaning membrane filter assembly.
In order to enable the surplus grey water to be selectively treated by the microporous ceramic filter assembly and/or the self-cleaning membrane filter assembly according to the requirement and then subjected to biochemical treatment, the filtering mechanism comprises the microporous ceramic filter assembly and the self-cleaning membrane filter assembly, the fourth pipeline is communicated with the water inlet of the microporous ceramic filter assembly through a first branch pipeline provided with a stop valve, is communicated with the water inlet of the self-cleaning membrane filter assembly through a second branch pipeline provided with a stop valve, the water outlet of the microporous ceramic filter assembly is communicated with a water treatment biochemical system through a third branch pipeline provided with a stop valve, and is communicated with the water inlet of the self-cleaning membrane filter assembly through a fourth branch pipeline provided with a stop valve and a water pump; preferably, the microporous ceramic filter assembly is composed of 2 sets of microporous ceramic filters, the self-cleaning membrane filter assembly is composed of 4 sets of self-cleaning membrane filters, and the types and the number of the filters can be changed according to ash treatment conditions.
In order to transfer ash more conveniently and ensure the cleanliness and environmental protection of the carried ash, a cooling slag table is arranged beside the slag sedimentation tank, and grab cranes are respectively arranged on the slag sedimentation tank and the cooling slag table.
As a preferred embodiment, an inspection well is also arranged on the ash ditch, and the inspection well can be accessed into the ash ditch for inspection through the passage during inspection.
In order to enable ash to move more smoothly under the action of the torrent nozzle, the gradient i of the ash ditch is 0.03-0.04, namely the direction from the gasification furnace to the slag basin is from high to low.
Under the condition of reducing water loss, in order to enable ash in an ash ditch to be washed more fully and generate reasonable pressure gradient in the ash ditch, the torrent nozzle array is composed of a main torrent nozzle assembly, a second torrent nozzle assembly and a third torrent nozzle assembly which are sequentially arranged, the third torrent nozzle assembly is positioned at one end of a slag hole of the ash ditch, the main torrent nozzle assembly is composed of M first torrent nozzles, the second torrent nozzle assembly is composed of N second torrent nozzles, the third torrent nozzle assembly is composed of Q third torrent nozzles, and the first torrent nozzles, the second torrent nozzle assembly and the third torrent nozzle assembly are identical in shape and sequentially reduced in size, and M, N, Q are all positive integers; preferably, M, N, Q increases in sequence and M is 1.
Further improved, the first, second and third torrent nozzles are composed of 90-degree elbows, first reducing pipes, second reducing pipes and third reducing pipes which are sequentially connected, the diameters of the first, second and third reducing pipes are sequentially reduced, and the included angle between the nozzle body and the horizontal plane is 5-15 degrees.
The beneficial effects of the invention are as follows: not only solves the problem of difficult treatment of ash residues of boilers and gasifiers, but also avoids the adverse effect of ash water on a subsequent water treatment biochemical system; not only realizes the suppression of ash and slag dust emission and the standard emission of ash water, contributes to environmental protection and generates long-term social benefits, but also ensures the normal operation of gasification furnaces, boilers and water treatment systems and improves the economic benefits of companies.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic flow diagram of an ash handling apparatus according to an embodiment of the invention.
Fig. 2 is a schematic structural view of the first torrent nozzle in fig. 1.
In the figure: 1. a gasification furnace vertical ash pipe; 2. a boiler ash chute; 3. an ash residue ditch; 4. a main torrent nozzle assembly; 5. an ash removal steam facility; 6. a slag basin; 7. a sedimentation tank; 8. a clean water tank; 9. cooling slag table; 10. grab bucket cranes; 11 and 14, water pumps; 12. a microporous ceramic filter assembly; 13. self-cleaning membrane filter assemblies; 15. an expansion condenser; 16. a coal supply stack bridge; 17. an ash flushing pipeline; 4 1 A second torrent nozzle assembly; 4 2 A third torrent nozzle assembly.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
The ash treatment device shown in fig. 1 and 2 comprises a gasification furnace vertical ash pipe 1 for receiving gasification furnace ash, a boiler ash chute 2 for receiving boiler ash, an ash ditch 3 with a sealing cover plate, a three-stage settling mechanism, a coal supply stack bridge 16, an expansion condenser 15 and a filtering mechanism; the ash ditch 3 is internally provided with a torrent nozzle array, and the torrent nozzle array is composed of a main torrent nozzle assembly 4 and a second torrent nozzle assembly 4 which are sequentially arranged 1 And a third torrent nozzle assembly 4 2 Is composed of and the third torrent nozzle group 4 2 The main torrent nozzle assembly 4 is a first torrent nozzle with the diameter of 1 phi 65 and the second torrent nozzle assembly 4 is arranged at one end of a slag hole of the slag ditch 3 1 Is composed of 4 phi 48 second torrent nozzles, the third torrent nozzle assembly 4 2 Is composed of 5 phi 20 third torrent nozzles, the first, second and third torrent nozzles have the same shape; the first, second and third torrent nozzles are composed of a 90-degree elbow (phi 273 multiplied by 8) D, a first reducing pipe (250 multiplied by 150) C, a second reducing pipe (150 multiplied by 100) B and a third reducing pipe (100 multiplied by 65) A which are sequentially connected, and the included angle between the nozzle body and the horizontal plane is 5-15 degrees; the ash ditch 3 is provided with a first ash inlet communicated with the gasification furnace vertical ash pipe 1 and a second ash inlet communicated with the boiler ash chute 2, the side wall or the bottom of the ash ditch 3 is provided with a steam outlet communicated with an ash removal steam facility 5, the ash removal steam facility 5 consists of two fans and corresponding pipelines, and the ash ditch 3 is also provided with an inspection well, so that the channel can enter the ash ditch for maintenance during maintenance; the three-stage sedimentation mechanism consists of a sedimentation tank 6, a sedimentation tank 7 and a clean water tank 8 which are sequentially arranged, a cooling slag table 9 is arranged beside the sedimentation tank 6, grab cranes 10 are respectively arranged on the sedimentation tank 6 and the cooling slag table 9, the sedimentation tank 6 is communicated with a slag hole of the slag runner 3, a gray water outlet connected with a water pump 11 is arranged at the bottom of the clean water tank 8, a water outlet of the water pump 11 is communicated with a gray flushing pipeline 17 through a first pipeline, the gray flushing pipeline 17 is communicated with a water inlet of the torrent nozzle array, a water outlet of the water pump 11 is communicated with a coal supply trestle 16 through a second pipeline, and coal is suppliedThe water outlet of the trestle 16 is communicated with the ash ditch 3, the water outlet of the water pump 11 is communicated with the expansion condenser 15 through a third pipeline, the water outlet of the water pump 11 is connected with the water treatment biochemical system through a filtering mechanism, wherein the filtering mechanism consists of a microporous ceramic filter assembly 12 consisting of 2 sets of microporous ceramic filters and a self-cleaning membrane filter assembly 13 consisting of 4 sets of self-cleaning membrane filters, the fourth pipeline is communicated with the water inlet of the microporous ceramic filter assembly 12 through a first branch pipeline provided with a stop valve, the water outlet of the microporous ceramic filter assembly 12 is communicated with the water inlet of the self-cleaning membrane filter assembly 13 through a second branch pipeline provided with a stop valve, and the water outlet of the microporous ceramic filter assembly 12 is communicated with the water treatment biochemical system through a third branch pipeline provided with a stop valve and the fourth branch pipeline of the water pump is communicated with the water inlet of the self-cleaning membrane filter assembly 13.
In order to enable ash to move more smoothly under the action of the torrent nozzle, the gradient i of the ash ditch is 0.03-0.04, namely the direction from the gasification furnace to the slag basin is from high to low.
The working process of the invention is as follows: the ash discharged by the gasification furnace ash lock falls into an ash ditch 3 through a gasification furnace vertical ash pipe 1, the ash discharged by a boiler is conveyed by a belt and falls into the ash ditch 3 through a boiler ash chute 2, the ash ditch 3 is closed by a cover plate, high-pressure water sprayed by a torrent nozzle array in the ash ditch flushes the ash into a slag sedimentation tank 6, after the ash is settled in the slag sedimentation tank 6, the ash is grabbed into a cooling slag table 9 by a grab crane 10 for filtering, and then the ash is conveyed to an out-plant slag field by an automobile; most of the ash water discharged from the clean water tank 8 is pumped into an ash flushing pipeline 17 by a water pump 11 to be supplied to the torrent nozzle array, so that the ash water is recycled; part of water is pumped into the expansion condenser 15 of the five gasifiers, is used as ash lock decompression condensation water, and can play a role in adjusting the liquid level of each ash pond; part of water can be used for flushing the coal supply trestle 16, and backwater is discharged to an ash ditch, so that ash water circulation is formed; when the liquid level of the ash pond rises and is ultrahigh, the ash pond is pumped into the microporous ceramic filter assembly 12 by the water pump 11, filtered by the microporous ceramic filter assembly 12, pressurized by the water pump 14 and further filtered by the self-cleaning film filter assembly 13; or both microporous ceramic filter assembly 12 and self-cleaning membrane filter assembly 13; or respectively and independently operating two filters to filter, and sending the filtered external drainage to a water treatment biochemical system for treatment, and simultaneously, the device can also play a role in adjusting the liquid level of each ash pond; the steam in the ash residue ditch is pumped out for treatment by an ash steam removing facility 5.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. An ash handling apparatus, comprising: the device comprises a gasification furnace vertical ash pipe for receiving gasification furnace ash, a boiler ash chute for receiving boiler ash, an ash ditch with a sealing cover plate, a three-stage settling mechanism, a coal supply stack bridge, an expansion condenser and a filtering mechanism; the ash ditch is internally provided with a torrent nozzle array, the ash ditch sealing cover plate is provided with a first ash inlet communicated with an ash pipe of the gasification furnace and a second ash inlet communicated with an ash chute of the boiler, and the side wall or the bottom of the ash ditch is provided with a steam outlet communicated with an ash removal steam facility; the three-stage sedimentation mechanism consists of a slag basin, a sedimentation basin and a clean water basin which are sequentially arranged, wherein the slag basin is communicated with a slag hole of the slag ditch, the bottom of the clean water basin is provided with a gray water outlet connected with a water pump, a water outlet of the water pump is communicated with a gray flushing pipeline through a first pipeline, the gray flushing pipeline is communicated with a water inlet of the torrent nozzle array, a water outlet of the water pump is communicated with the coal supply stack bridge through a second pipeline, a water outlet of the coal supply stack bridge is communicated with the slag ditch, a water outlet of the water pump is communicated with the expansion condenser through a third pipeline, and a water outlet of the water pump is connected with a water treatment biochemical system through a filtering mechanism; wherein, the ash treatment method comprises the following steps: the ash residue in the ash residue ditch is flushed into a slag sedimentation tank by high-pressure water generated by the torrent nozzle array, the precipitated ash residue is carried away after being filtered, most of the generated ash water is supplied to the torrent nozzle array to form water circulation, water is supplied to a coal trestle and an expansion condenser according to requirements, and the redundant ash water is subjected to biochemical treatment after being filtered; and discharging ash steam generated in the ash ditch, wherein the pressure generated by the torrent nozzle array is sequentially reduced along with the moving direction of ash in the ash ditch.
2. The ash handling apparatus of claim 1, wherein: the filter mechanism is composed of a microporous ceramic filter assembly and a self-cleaning membrane filter assembly, the fourth pipeline is communicated with the water inlet of the microporous ceramic filter assembly through a first branch pipeline provided with a stop valve, the fourth pipeline is communicated with the water inlet of the self-cleaning membrane filter assembly through a second branch pipeline provided with a stop valve, the water outlet of the microporous ceramic filter assembly is communicated with a water treatment biochemical system through a third branch pipeline provided with a stop valve, and the third branch pipeline is communicated with the water inlet of the self-cleaning membrane filter assembly through a fourth branch pipeline provided with a stop valve and a water pump.
3. The ash handling apparatus of claim 1, wherein: a cooling slag table is arranged beside the slag basin, and grab cranes are respectively arranged on the slag basin and the cooling slag table.
4. The ash handling apparatus of claim 1, wherein: the gradient i of the ash slag groove is 0.03-0.04.
5. The ash handling apparatus of claim 1, wherein: the ash removal steam facility consists of two fans and corresponding pipelines.
6. The ash handling apparatus of claim 1, wherein: an inspection well is also arranged on the ash residue ditch.
7. The ash handling apparatus according to any of claims 1-6, characterized in that: the system comprises a slag runner, a main torrent nozzle array, a second torrent nozzle assembly and a third torrent nozzle assembly, wherein the main torrent nozzle assembly, the second torrent nozzle assembly and the third torrent nozzle assembly are sequentially arranged, the third torrent nozzle assembly is positioned at one end of a slag hole of the slag runner, the main torrent nozzle assembly consists of M first torrent nozzles, the second torrent nozzle assembly consists of N second torrent nozzles, the third torrent nozzle assembly consists of Q third torrent nozzles, the first torrent nozzles, the second torrent nozzles and the third torrent nozzles are identical in shape and sequentially reduced in size, M, N, Q is a positive integer, and M, N, Q is sequentially increased.
8. The ash handling apparatus of claim 7, wherein: the first, second and third torrent nozzles are composed of a 90-degree elbow, a first reducing pipe, a second reducing pipe and a third reducing pipe which are sequentially connected, the diameters of the first, second and third reducing pipes are sequentially reduced, and the included angle between the nozzle body and the horizontal plane is 5-15 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533390.7A CN108555003B (en) | 2018-05-29 | 2018-05-29 | Ash processing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533390.7A CN108555003B (en) | 2018-05-29 | 2018-05-29 | Ash processing method and device |
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| Publication Number | Publication Date |
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| CN108555003A CN108555003A (en) | 2018-09-21 |
| CN108555003B true CN108555003B (en) | 2023-11-24 |
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| CN201810533390.7A Active CN108555003B (en) | 2018-05-29 | 2018-05-29 | Ash processing method and device |
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Families Citing this family (1)
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| CN111921258A (en) * | 2020-08-03 | 2020-11-13 | 内蒙古双欣环保材料股份有限公司 | Solid-liquid separation device |
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2018
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| CN1951542A (en) * | 2005-10-19 | 2007-04-25 | 中国石油化工股份有限公司 | Coal burning boiler flue gas desulfurization method and device |
| CN101109513A (en) * | 2006-07-19 | 2008-01-23 | 贵阳铝镁设计研究院 | Processing method for furnace bottom slag of alumina plant self-contained thermoelectric plant |
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