CN217274137U

CN217274137U - Desulfurization, denitrification and dust removal integrated device of special waste fluidized bed incinerator

Info

Publication number: CN217274137U
Application number: CN202220856811.1U
Authority: CN
Inventors: 唐庆霖; 龙沛沛; 陈建洪; 江荣生
Original assignee: Fujian Environmental Engineering Co ltd
Current assignee: Fujian Environmental Engineering Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-23
Anticipated expiration: 2032-04-14

Abstract

The utility model relates to a desulfurization denitration dust removal integrated device that special waste fluidized bed burns burning furnace, including burning furnace and the interior desulfurization system of stove, burn burning furnace upper portion exhaust port and be connected with the exhaust pipe who leads to the chimney, SNCR deNOx systems, humidification system, dust pelletizing system and draught fan have connected gradually along the play cigarette direction on the exhaust pipe. The utility model discloses special waste fluidized bed burns burning furnace's SOx/NOx control dust removal integrated device simple structure reforms transform for a short time, easy operation maintenance, burn burning furnace's burning temperature with the help of special waste fluidized bed, sulfur dioxide in the reduction flue gas ensures going on smoothly of follow-up denitration reaction, also can reduce the formation of ammonium sulfate, reduces the corruption to follow-up equipment, ensures that several pollutants of nitrogen oxide, sulfur dioxide, particulate matter discharge up to standard steadily.

Description

Desulfurization, denitrification and dust removal integrated device of special waste fluidized bed incinerator

Technical Field

The utility model relates to a waste treatment technical field, especially a special waste material fluidized bed burns burning furnace's SOx/NOx control dust removal integrated device.

Background

The fluidized bed incinerator has the characteristics of wide fuel adaptability, high combustion efficiency, low nitrogen oxide emission and the like, and is widely used in production, in recent years, the thermal engineering research institute of Zhejiang university expands the fluidized bed incinerator to the field of hazardous waste incineration, develops a special waste fluidized bed incinerator, and realizes effective disposal of hazardous solid wastes such as oil sludge and sludge. The special waste fluidized bed incinerator adopts a low-nitrogen combustion design, and flue gas is desulfurized by adopting a semi-dry method and is dedusted by a cloth bag. The emission of nitrogen oxides, sulfur dioxide and smoke dust can meet the emission control requirements in the hazardous waste incineration pollution control Standard (GB 18484-2001). With the increasing strictness of environmental requirements, new pollution control standards for hazardous waste incineration (GB 18484-2020) are being implemented on 7/1/2021. The standard limits the emission of nitrogen oxides from the original 500mg/m ³ Reducing to 24 hours mean value or daily mean value of 250mg/m ³ The emission limit of the sulfur dioxide is 200mg/m ³ Reducing to 24 hours mean value or daily mean value of 80mg/m ³ The emission limit of the particulate matter is set to 65mg/m ³ Reducing to 24 hours mean value or daily mean value of 20mg/m ³ . Because the special waste fluidized bed incinerator has large material fluctuation, the original process technology can not ensure the stable standard emission of the pollutants.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a simple structure reforms transform for a short time, easy operation maintenance's special waste matter fluidized bed burns burning furnace's SOx/NOx control dust removal integrated device, ensures that several pollutants of nitrogen oxide, sulfur dioxide, particulate matter are stable discharge to reach standard.

The utility model discloses a following scheme realizes: a desulfurization, denitrification and dedusting integrated device of a special waste fluidized bed incinerator comprises the incinerator and an in-furnace desulfurization system, wherein an upper smoke outlet of the incinerator is connected with a smoke exhaust pipeline leading to a chimney, and the smoke exhaust pipeline is sequentially connected with an SNCR (selective non catalytic reduction) denitrification system, a humidifying system, a dedusting system and an induced draft fan along a smoke outlet direction.

Furthermore, the combustion chamber of the incinerator is divided into a dense-phase area at the lower part and a dilute-phase area at the upper part, the in-furnace desulfurization system comprises a limestone storage tank and limestone nozzles uniformly distributed on the furnace wall around the dense-phase area, and the limestone storage tank and the limestone nozzles are connected through a pneumatic conveying pipeline.

Furthermore, a blanking pipe and a coal blanking pipe are arranged on the side part of the dense-phase area of the combustion chamber, and a secondary air inlet is arranged on the periphery of the dilute-phase area of the combustion chamber.

Further, SNCR deNOx systems includes liquid ammonia storage tank, deoxidization water storage tank and locates the first spray gun on the exhaust pipe, be connected through mixing the pipeline between liquid ammonia storage tank and deoxidization water storage tank and the spray gun.

Furthermore, the humidifying system comprises a fresh water storage tank and a humidifying tower connected in series on the smoke exhaust pipeline, a second spray gun is arranged on the side of the humidifying tower, and the fresh water storage tank is connected with the second spray gun through a water supply pipeline.

Furthermore, the dust removal system comprises a fly ash bin and a bag-type dust remover connected in series with the humidifying tower on the smoke exhaust pipeline, and the fly ash bin is connected with the bag-type dust remover through an ash outlet pipeline.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses special waste fluidized bed incinerator's SOx/NOx control dust removal integrated device simple structure reforms transform for a short time, easy operation is maintained, with the help of special waste fluidized bed incinerator's burning temperature, reduce the sulfur dioxide in the flue gas, ensure going on smoothly of follow-up denitration reaction, also can reduce the formation of ammonium sulfate, reduce the corruption to follow-up equipment, ensure that several pollutants of nitrogen oxide, sulfur dioxide, particulate matter are stable discharge to reach standard.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;

the reference numbers in the figures illustrate: 1-incinerator, 2-chimney, 3-smoke exhaust pipeline, 4-draught fan, 5-limestone storage tank, 6-limestone nozzle, 7-pneumatic conveying pipeline, 8-blanking pipe, 9-coal blanking pipe, 10-secondary air inlet, 11-liquid ammonia storage tank, 12-deaerated water storage tank, 13-first spray gun, 14-mixing conveying pipeline, 15-fresh water storage tank, 16-humidifying tower, 17-second spray gun, 18-fly ash bin, 19-bag dust collector and 20-waste heat utilization device.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in figure 1, the desulfurization, denitrification and dedusting integrated device of the special waste fluidized bed incinerator comprises an incinerator 1 and an in-furnace desulfurization system, wherein a smoke exhaust port in the upper part of the incinerator is connected with a smoke exhaust pipeline 3 leading to a chimney 2, and the smoke exhaust pipeline is sequentially connected with an SNCR (selective non-catalytic reduction) denitrification system, a humidification system, a dedusting system and an induced draft fan 4 along the smoke outlet direction; this SOx/NOx control dust removal integrated device is with the help of special waste material fluidized bed incinerator's incineration temperature, and simple structure, operation maintenance are easy, the transformation is few, ensure several pollutants of nitrogen oxide, sulfur dioxide, particulate matter and discharge up to standard steadily, burn burning furnace upper portion exhaust port and be equipped with the over heater.

In this embodiment, the combustion chamber of the incinerator is divided into a dense phase zone located at the lower part and a dilute phase zone located at the upper part, the in-furnace desulfurization system comprises a limestone storage tank 5 and limestone nozzles 6 uniformly distributed on the furnace walls around the dense phase zone, the limestone storage tank and the limestone nozzles are connected through a pneumatic conveying pipeline 7, the limestone storage tank is conveyed into the incineration chamber through the limestone nozzles 6 in a pneumatic conveying manner, limestone is ensured to be uniformly conveyed into the incinerator through pneumatic conveying, the material is primarily incinerated in the dense phase zone after entering the incinerator, the temperature is 850-.

In the embodiment, a blanking pipe 8 and a blanking pipe 9 are arranged at the side part of the dense-phase area of the combustion chamber, and a secondary air inlet 10 is arranged at the periphery of the dilute-phase area of the combustion chamber.

In this embodiment, SNCR deNOx systems includes liquid ammonia storage tank 11, the storage tank 12 of oxygen-eliminating water and locates the first spray gun 13 on the exhaust pipe, be connected through mixing pipeline 14 between liquid ammonia storage tank and oxygen-eliminating water storage tank and the spray gun. The flue gas of the desulfurization reaction enters a dilute phase zone to further burn off organic matters, then the temperature reaches 900 ℃ after passing through a heater, a meter is arranged on the mixed conveying pipeline 14, ammonia water and deoxygenated water can be reasonably distributed, the ammonia water and the deoxygenated water are mixed and then are sprayed into the flue gas through a spray gun, and the nitrogen oxides react with the ammonia water.

In the embodiment, the humidifying system comprises a fresh water storage tank 15 and a humidifying tower 16 connected in series on a smoke exhaust pipeline, a second spray gun 17 is arranged on the side of the humidifying tower, and the fresh water storage tank and the second spray gun are connected through a water supply pipeline; and spraying the fresh water in the fresh water storage tank into the humidifying tower through the second spray gun for activating the unreacted calcium oxide in the flue gas and further promoting the reaction of sulfur dioxide and calcium oxide, wherein the sulfur dioxide can also react with the escaped ammonia in the flue gas at the temperature, so that the escaped ammonia amount is reduced.

In this embodiment, the dust removing system includes a fly ash bin 18 and a bag-type dust remover 19 connected in series to the smoke exhaust pipe and having a humidifying tower, and the fly ash bin and the bag-type dust remover are connected by an ash discharge pipe. The humidified flue gas enters a bag-type dust collector 19, the bag-type dust collector 19 adopts a high-quality coated filter bag, dust is intercepted and collected into a fly ash bin through the bag-type dust collector 19, and clean flue gas is discharged through a chimney along with an induced draft fan.

In this embodiment, the exhaust duct is further connected with a waste heat utilization device 20 located between the SNCR denitration system and the humidification system, the waste heat utilization device belongs to the prior art, the structure and the distance thereof are not specifically described herein, and the temperature of the flue gas is reduced to 150 ℃ after the flue gas is subjected to waste heat recovery.

With the help of the incineration temperature of the special waste fluidized bed incinerator, the integrated device for desulfurization, denitration and dust removal in the incinerator is arranged, so that sulfur dioxide in flue gas is reduced, the smooth proceeding of subsequent denitration reaction is ensured, the generation of ammonium sulfate can be reduced, the corrosion to subsequent equipment is reduced, not only is each pollutant control link effectively exerted, the stable standard-reaching discharge of pollutants is ensured, but also the structure is simple, the improvement to the original special waste fluidized bed incinerator is small, and the operation and maintenance are easy.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a special waste matter fluidized bed incinerator's SOx/NOx control dust removal integrated device which characterized in that: the system comprises an incinerator and an in-furnace desulfurization system, wherein an upper smoke outlet of the incinerator is connected with a smoke exhaust pipeline leading to a chimney, and the smoke exhaust pipeline is sequentially connected with an SNCR (selective non catalytic reduction) denitration system, a humidification system, a dust removal system and an induced draft fan along a smoke outlet direction.

2. The desulfurization, denitrification and dedusting integrated device of the special waste fluidized bed incinerator according to claim 1, characterized in that: the combustion chamber of the incinerator is divided into a dense-phase area at the lower part and a dilute-phase area at the upper part, the in-furnace desulfurization system comprises a limestone storage tank and limestone nozzles uniformly distributed on the furnace walls around the dense-phase area, and the limestone storage tank and the limestone nozzles are connected through a pneumatic conveying pipeline.

3. The desulfurization, denitrification and dedusting integrated device of the special waste fluidized bed incinerator according to claim 2, characterized in that: the side part of the dense-phase area of the combustion chamber is provided with a discharging pipe and a coal discharging pipe, and the periphery of the dilute-phase area of the combustion chamber is provided with a secondary air inlet.

4. The integrated desulfurization, denitrification and dedusting device of the special waste fluidized bed incinerator according to claim 1, characterized in that: SNCR deNOx systems includes liquid ammonia storage tank, deoxidization water storage tank and locates the first spray gun on the exhaust pipe, be connected through mixing the pipeline between liquid ammonia storage tank and deoxidization water storage tank and the spray gun.

5. The desulfurization, denitrification and dedusting integrated device of the special waste fluidized bed incinerator according to claim 1, characterized in that: the humidifying system comprises a fresh water storage tank and a humidifying tower connected in series on the smoke exhaust pipeline, a second spray gun is arranged on the side of the humidifying tower, and the fresh water storage tank is connected with the second spray gun through a water supply pipeline.

6. The integrated desulfurization, denitrification and dedusting device of the special waste fluidized bed incinerator according to claim 1, characterized in that: the dust removal system comprises a fly ash bin and a bag-type dust remover connected in series with a humidifying tower on a smoke exhaust pipeline, and the fly ash bin is connected with the bag-type dust remover through an ash outlet pipeline.