CN115722005A - Integrated dust and nitrate removing system and method for garbage incinerator - Google Patents
Integrated dust and nitrate removing system and method for garbage incinerator Download PDFInfo
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- CN115722005A CN115722005A CN202211450735.5A CN202211450735A CN115722005A CN 115722005 A CN115722005 A CN 115722005A CN 202211450735 A CN202211450735 A CN 202211450735A CN 115722005 A CN115722005 A CN 115722005A
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Abstract
The invention relates to a waste incineration technology, and aims to provide a system and a method for integrally removing dust and nitrate from a waste incinerator. Is to arrange a dust and nitrate removing device in a flue, comprising: the front baffle is arranged in the flue and is vertical to the airflow direction, and an air inlet channel is reserved between the lower edge of the front baffle and the bottom surface of the flue; the rear baffle is parallel to the front baffle and is arranged in the flue, and an air outlet channel is reserved between the upper edge of the rear baffle and the top surface of the flue; the filter bag is horizontally arranged between the front baffle and the rear baffle; the air injection device is arranged above the filter bag; the catalyst filling layer is positioned above the air injection device and horizontally arranged between the front baffle and the rear baffle; the water-cooling scraper machine is arranged on the bottom surface of the flue below the filter bag and is connected with the slag discharge pipe. The invention realizes intensive structural design and reduces the occupied space of single equipment; the whole structure of the system is simple, and the equipment cost can be greatly reduced; the negative influence caused by the accumulated dust on the heating surface can be greatly reduced; the operation period of the garbage incinerator is prolonged, and the operation cost is reduced.
Description
Technical Field
The invention relates to a waste incineration technology, in particular to a system and a method for integrally removing dust and nitrate from a waste incinerator.
Background
In the mainstream technology at present, the treatment mode of dust and NOx in the smoke pollutants of the garbage incinerator is as follows: spraying materials such as ammonia water into the hearth to carry out SNCR denitration, and removing dust in the flue gas through a bag-type dust remover; then, a catalyst is arranged behind the bag-type dust collector to carry out SCR denitration, and meanwhile, a matched GGH system and other systems are required to heat the temperature of the inlet flue gas of the SCR. The process route has the following defects: (1) A plurality of split devices are used, and the operation systems of the devices are mutually independent; the integral device has large floor area, long gas conveying distance and large flow resistance; (2) The SCR catalyst needs to be matched with a heating system, so that hot steam is consumed, and the heat efficiency of a power plant is reduced; and (3) the system construction investment cost and the operation maintenance cost are high.
At present, researchers in the industry conduct related research on synergistic treatment of the dust and the nitre. For example, chen Guifu et al, in the Chinese patent application CN111013348A, introduced an integrated dust and nitrate treatment method suitable for a dusty segment in a cement kiln; liu Quanhui et al introduced a biomass boiler dust and saltpeter treatment device in Chinese utility model patent CN 207928978U. However, the flue gas composition of the cement kiln or the biomass power plant mentioned in these documents is not the same as that of the garbage incinerator. The smoke components of the garbage incinerator are relatively more complex, the dust concentration is high, and the garbage incinerator is rich in pollutants such as acid gas and heavy metal, and if the garbage incinerator is forcibly used, the connecting part is corroded and is easy to block. Therefore, such techniques are not applicable to garbage incinerators.
Therefore, the dust and nitrate integrated efficient removal system is more applicable to the garbage incinerator and has practical significance.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a dust and nitrate integrated removal system and method for a garbage incinerator.
In order to solve the technical problem, the solution of the invention is as follows:
the integrated dust and nitrate removing system of the garbage incinerator is provided, a flue gas outlet of the garbage incinerator is connected to a horizontal flue, and a plurality of superheaters are sequentially arranged in the flue and used for recovering flue gas heat; the area with the temperature of 300-450 ℃ in the flue is provided with a dust and nitrate removing device, which comprises: the front baffle is arranged in the flue and is vertical to the airflow direction, and an air inlet channel is reserved between the lower edge of the front baffle and the bottom surface of the flue; the rear baffle is parallel to the front baffle and is arranged in the flue, and an air outlet channel is reserved between the upper edge of the rear baffle and the top surface of the flue; the filter bag is horizontally arranged between the front baffle and the rear baffle and is used for filtering flue gas and intercepting dust; the air injection device is arranged above the filter bag and used for injecting air at regular time to separate dust from the surface of the filter bag; the catalyst filling layer is positioned above the air injection device, is horizontally arranged between the front baffle and the rear baffle and is used for carrying out denitration catalytic reaction on the dedusted flue gas; and the water-cooling scraper conveyor is arranged on the bottom surface of the flue below the filter bag, is connected with the slag discharge pipe and is used for removing dust falling from the filter bag.
As the preferred scheme of the invention, the bottom surface of the flue below the filter bag is in a funnel shape, and the water-cooling scraper conveyor is positioned at the lowest part of the funnel shape.
As a preferable scheme of the invention, the dust and nitrate removing device is arranged between the two superheaters.
As an alternative scheme, the invention also provides a dust and nitrate integrated removal system of the garbage incinerator, wherein a flue gas outlet of the incinerator is connected to a horizontal flue, and a plurality of superheaters are sequentially arranged in the flue and used for absorbing convection heat of flue gas; in the area with the temperature of 300-450 ℃ in the flue, a front baffle and a rear baffle are respectively arranged in front of and behind a certain superheater along the airflow direction; the front baffle is arranged in the flue perpendicular to the airflow direction, an air inlet channel is reserved between the lower edge of the front baffle and the bottom surface of the flue, and a flue gas outlet is arranged in the channel; the rear baffle is parallel to the front baffle and is arranged in the flue, an air outlet channel is reserved between the upper edge of the rear baffle and the top surface of the flue, and a flue gas reflux port is arranged in the channel; the smoke outlet and the smoke return port are respectively connected to a smoke inlet and a smoke outlet of the cloth bag filter through pipelines; in the cloth bag filter, from bottom to top are sequentially arranged: the device comprises a filter bag for filtering flue gas and intercepting dust, an air injection device for injecting air regularly to separate the dust from the surface of the filter bag, and a catalyst filling layer for carrying out denitration catalytic reaction on the dedusted flue gas; the flue gas inlet is arranged on the side wall below the filter bag, and the flue gas outlet is arranged on the side wall or the top above the catalyst filling layer; the bottom of the cloth bag filter is provided with a water-cooling scraper machine used for removing falling dust.
In a preferred embodiment of the present invention, the bottom of the bag filter is funnel-shaped, and the water-cooled scraper is located at the lowest position of the funnel-shape.
In a preferred embodiment of the present invention, a superheater is provided in front of the front baffle and in rear of the rear baffle.
As the preferable scheme of the invention, the filter bag is a metal felt filter bag and comprises a plurality of filter bag monomers arranged on a porous plate, and two ends of the porous plate are respectively fixedly arranged on a front baffle and a rear baffle; the air blowing device is provided with a plurality of nozzles, each nozzle corresponds to one filter bag monomer and is arranged at the upper opening end of the filter bag monomer.
As a preferred scheme of the invention, a water feeding port and a water return port are arranged on the water-cooled scraper conveyor and are respectively connected to a waste heat boiler through pipelines.
Based on the two systems, the invention further provides a dust and nitrate integrated removal method for the waste incinerator, which specifically comprises the following steps: flue gas generated by the garbage incinerator enters the horizontal flue, and is cooled after heat exchange by a plurality of superheaters; in the area with the temperature of 300-450 ℃ in the flue, the flue gas enters a dust and nitrate removing device from an air inlet channel or is introduced into an equivalent cloth bag filter; the dust and nitrate removing device or the cloth bag filter keeps the temperature condition of 300-450 ℃, the temperature difference between the air inlet channel and the air outlet channel is less than 15 ℃, and the pressure difference is less than 1000pa; in a dust and nitrate removal device or a cloth bag filter, firstly filtering flue gas by a cloth bag and intercepting dust, and then carrying out denitration catalytic reaction on the flue gas subjected to dust removal by a catalyst filling layer; the air injection device injects air regularly to separate dust on the surface of the filter bag, and the water-cooled scraper conveyor removes the falling dust and sends the dust out of the system through a slag discharge pipe; and finally, the flue gas subjected to the dust and nitrate removal enters a flue gas purification system for washing or adsorption treatment after heat exchange of a heat exchanger.
As a preferable scheme of the invention, the selective catalytic reduction catalyst is filled in the catalyst filling layer, and the nitrogen oxide in the flue gas can be converted into water and nitrogen within the temperature range of 300-450 ℃ to realize the aim of denitration.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes intensive structural design and reduces the occupied space of single equipment; the system has simple integral structure and can greatly reduce the equipment cost.
2. By efficiently removing dust in the flue, the negative influence caused by dust deposition on the heating surface can be greatly reduced; the operation period of the garbage incinerator is prolonged, and the operation cost is reduced;
3. dust removal treatment is carried out firstly, so that the phenomenon that the dust is heated to generate dioxin again can be avoided; the denitration catalytic reaction process design can continuously utilize the heat of the flue gas, avoid the waste of heat and effectively save the cost.
4. In the existing common flue gas purification system, the flue gas is usually purified by using methods such as alkali liquor washing or microporous material adsorption. The invention considers dust removal and denitration, can greatly reduce the processing pressure of the flue gas purification system, and reduces the consumption of consumables such as alkaline materials, active carbon and the like, thereby reducing the output of hazardous waste and saving the disposal cost of the hazardous waste.
5. The practical verification proves that the dust removal efficiency of the invention reaches 95 percent, and the dust content of the outlet is less than 100mg/Nm 3 The denitration efficiency of the catalyst can reach more than 90 percent, and the comprehensive aims of perfectly realizing the integrated high-efficiency removal of dust and nitrate, reducing the yield of fly ash and improving the economic efficiency can be fulfilled.
Drawings
FIG. 1 is a schematic view of an integrated efficient dust and nitrate removing system of a waste incinerator according to the present invention;
fig. 2 is a schematic diagram of an integrated efficient dust and nitrate removal system of a waste incinerator based on the built-in device (an equivalent bag filter is used for replacing a built-in dust and nitrate removal device).
Reference numbers in the figures: a superheater 1; an intake passage 2; a metal felt filter bag 3; an air blowing device 4; a catalyst-packed layer 5; an air outlet channel 6; a water-cooled scraper conveyor 7; a boiler feed pipe 8; a boiler return pipe 9; a slag discharge pipe 10.
Detailed Description
The invention discloses a dust and nitrate integrated removal system of a waste incinerator, which is shown in figure 1. A flue gas outlet of the garbage incinerator is connected to a horizontal flue, and a plurality of superheaters 1 are sequentially arranged in the flue and used for recovering flue gas heat; a dust and nitrate removing device is arranged in the area with the temperature of 300-450 ℃ in the flue. The dirt nitre desorption device is located between two over heaters, and the device includes: the front baffle is arranged in the flue and perpendicular to the airflow direction, and an air inlet channel 2 is reserved between the lower edge of the front baffle and the bottom surface of the flue; a rear baffle plate which is parallel to the front baffle plate and is arranged in the flue, and an air outlet channel 6 is reserved between the upper edge of the rear baffle plate and the top surface of the flue; the metal felt filter bag 3 is horizontally arranged between the front baffle and the rear baffle and is used for filtering smoke and intercepting dust; the air injection device 4 is arranged above the metal felt filter bag 3 and is used for injecting air regularly to enable dust to be separated from the surface of the filter bag; the catalyst filling layer 5 is positioned above the air blowing device 4 and horizontally arranged between the front baffle and the rear baffle and is used for carrying out denitration catalytic reaction on the dedusted flue gas; and the water-cooling scraper conveyor 7 is arranged on the bottom surface of the flue below the filter bag and is connected with the residue discharge pipe and used for removing dust falling from the filter bag. The metal felt filter bag 3 comprises a plurality of filter bag monomers arranged on a porous plate, and two ends of the porous plate are respectively and fixedly arranged on a front baffle and a rear baffle; the air blowing device 4 has a plurality of nozzles, each of which corresponds to one filter bag unit. The bottom of the flue below the metal felt filter bag 3 is in a funnel shape, and the water-cooling scraper conveyor 7 is positioned at the lowest part of the funnel shape. The water-cooling scraper 7 is provided with a water supply port and a water return port which are respectively connected to the waste heat boiler through a boiler water supply pipe 8 and a boiler water return pipe 9.
The integrated dust and nitrate removing system shown in fig. 1 is a design scheme for a newly-built device, and the dust and nitrate removing device is arranged in a horizontal flue. Aiming at the built device, the invention also provides a transformation scheme, which is to replace the built-in dust and nitrate removing device with an equivalent cloth bag filter. As shown in fig. 2:
the flue gas outlet of the incinerator is connected to a horizontal flue, and a plurality of superheaters 1 are sequentially arranged in the flue and used for absorbing convection heat of flue gas; in the area with the temperature of 300-450 ℃ in the flue, a front baffle and a rear baffle are respectively arranged in front of and behind a middle superheater along the airflow direction (namely, a superheater is respectively arranged in front of the front baffle and behind the rear baffle); the front baffle is arranged in the flue perpendicular to the airflow direction, an air inlet channel 2 is reserved between the lower edge of the front baffle and the bottom surface of the flue, and a flue gas outlet is arranged in the channel; the rear baffle is parallel to the front baffle and is arranged in the flue, an air outlet channel 6 is reserved between the upper edge of the rear baffle and the top surface of the flue, and a flue gas reflux port is arranged in the channel; the smoke leading-out port and the smoke return port are respectively connected to a smoke inlet and a smoke outlet of the cloth bag filter through pipelines. In the cloth bag filter, from bottom to top are arranged in sequence: the device comprises a metal felt filter bag 3 for filtering flue gas and intercepting dust, an air injection device 4 for injecting air regularly to make the dust separate from the surface of the filter bag, and a catalyst filling layer 5 for carrying out denitration catalytic reaction on the dedusted flue gas; the flue gas inlet is arranged on the side wall below the metal felt filter bag 3, and the flue gas outlet is arranged on the side wall or the top above the catalyst filling layer 5; the bottom of the cloth bag filter is provided with a water-cooling scraper conveyor 7 for removing falling dust, and a water supply port and a water return port of the cloth bag filter are respectively connected to a waste heat boiler through a boiler water supply pipe 8 and a boiler water return pipe 9. The bottom of the cloth bag filter is funnel-shaped, and the water-cooling scraper conveyor 7 is positioned at the lowest part of the funnel shape.
Based on the two systems, the integrated dust and nitrate removing method for the waste incinerator provided by the invention specifically comprises the following steps: taking a grate type garbage incinerator as an example, the generated flue gas enters a horizontal flue and is cooled after heat exchange by a plurality of superheaters. In the area with the temperature of 300-450 ℃ in the flue, the flue gas enters a dust and nitrate removing device from an air inlet channel or is introduced into an equivalent cloth bag filter. The dust and nitrate removing device or the cloth bag filter keeps the temperature condition of 300-450 ℃, the temperature difference between the air inlet channel 2 and the air outlet channel 6 is less than 15 ℃, and the pressure difference is less than 1000pa.
In a dust and nitrate removing device or a cloth bag filter, firstly filtering flue gas by a metal felt filter bag 3 and intercepting dust, and then carrying out denitration catalytic reaction on the flue gas subjected to dust removal by a catalyst filling layer 5; the air injection device 4 injects air at regular time to separate dust on the surface of the metal felt filter bag 3, and the water-cooled scraper conveyor 7 removes the falling dust and sends the dust out of the system through a slag discharge pipe 10; and finally, the flue gas subjected to the dust and nitrate removal enters a flue gas purification system for washing or adsorption treatment after heat exchange of a heat exchanger.
In the invention, the selective catalytic reduction catalyst is filled in the catalyst filling layer, and the nitrogen oxide in the flue gas can be converted into water and nitrogen within the temperature range of 300-450 ℃ to realize the aim of denitration. The reaction mechanism and process control conditions of the catalytic reduction process belong to the prior art, and the reaction process can be described by the following equation:
4NO+4NH 3 +O 2 →4N 2 +6H 2 O
6NO+4NH 3 →5N 2 +6H 2 O
6NO 2 +8NH 3 →7NO 2 +12H 2 O
2NO 2 +4NH 3 +O 2 →3N 2 +6H 2 O
based on the system, the metal felt filter bag 3 is used for intercepting dust in smoke, the matched pulse soot blowing device 4 performs soot blowing according to a set program, and one path of cold water is guided from a boiler water supply pipe to absorb heat of high-temperature dust in the water-cooling scraper conveyor 7 and then returns to the boiler, so that heat loss of the high-temperature dust is reduced; the cooled ash is delivered to the boiler slag space through a slag discharge pipe 10 by a water-cooled scraper conveyor 7, so that the yield of tail fly ash hazardous waste is reduced. Meanwhile, the flue gas after dust removal is subjected to denitration through the catalyst filling layer 5, and the flue gas after dust and nitrate removal enters the flue gas purification system after heat exchange of the superheater.
Therefore, the integrated system based on the dust removal and denitration realizes the integrated removal of the dust and the nitrate in the tail gas of the waste incinerator and perfectly achieves the aim of the invention. In addition, the invention is not only suitable for removing the smoke and the dust and the nitre of the grate type garbage incinerator, but also suitable for other types of garbage incinerators (such as fluidized bed garbage incinerators and the like).
Claims (10)
1. An integrated dust and nitrate removal system of a garbage incinerator is characterized in that a flue gas outlet of the garbage incinerator is connected to a horizontal flue, and a plurality of superheaters are sequentially arranged in the flue and used for recovering flue gas heat; the dust and nitrate removing device is arranged in the area with the temperature of 300-450 ℃ in the flue, and the device comprises:
the front baffle is arranged in the flue and is vertical to the airflow direction, and an air inlet channel is reserved between the lower edge of the front baffle and the bottom surface of the flue;
the rear baffle is parallel to the front baffle and is arranged in the flue, and an air outlet channel is reserved between the upper edge of the rear baffle and the top surface of the flue;
the filter bag is horizontally arranged between the front baffle and the rear baffle and is used for filtering flue gas and intercepting dust;
the air injection device is arranged above the filter bag and used for injecting air at regular time to separate dust from the surface of the filter bag;
the catalyst filling layer is positioned above the air injection device, is horizontally arranged between the front baffle and the rear baffle and is used for carrying out denitration catalytic reaction on the dedusted flue gas;
and the water-cooling scraper conveyor is arranged on the bottom surface of the flue below the filter bag, is connected with the slag discharge pipe and is used for removing dust falling from the filter bag.
2. The system of claim 1, wherein the bottom of the flue below the filter bag is funnel shaped, and the water-cooled scraper conveyor is located at the lowest part of the funnel shape.
3. The system of claim 1, wherein the dust and nitrate removal device is arranged between two superheaters.
4. An integrated dust and nitrate removal system of a garbage incinerator is characterized in that a flue gas outlet of the incinerator is connected to a horizontal flue, and a plurality of superheaters are sequentially arranged in the flue and used for absorbing convection heat of flue gas; in the area with the temperature of 300-450 ℃ in the flue, a front baffle and a rear baffle are respectively arranged in front of and behind a certain superheater along the airflow direction;
the front baffle is arranged in the flue perpendicular to the airflow direction, an air inlet channel is reserved between the lower edge of the front baffle and the bottom surface of the flue, and a flue gas outlet is arranged in the channel; the rear baffle is parallel to the front baffle and is arranged in the flue, an air outlet channel is reserved between the upper edge of the rear baffle and the top surface of the flue, and a flue gas reflux port is arranged in the channel; the smoke outlet and the smoke return port are respectively connected to a smoke inlet and a smoke outlet of the cloth bag filter through pipelines;
in the cloth bag filter, from bottom to top are arranged in sequence: the device comprises a filter bag for filtering flue gas and intercepting dust, an air injection device for injecting air at regular time to separate the dust from the surface of the filter bag, and a catalyst filling layer for carrying out denitration catalytic reaction on the flue gas after dust removal; the flue gas inlet is arranged on the side wall below the filter bag, and the flue gas outlet is arranged on the side wall or the top above the catalyst filling layer; the bottom of the cloth bag filter is provided with a water-cooling scraper machine used for removing falling dust.
5. The system of claim 1, wherein the bottom of the bag filter is funnel shaped with a water cooled scraper located at the lowest of the funnel shape.
6. The system of claim 1, wherein a superheater is disposed in front of the front baffle and behind the rear baffle.
7. The system according to any one of claims 1 or 4, wherein the filter bag is a metal felt filter bag, and comprises a plurality of filter bag units mounted on a porous plate, and two ends of the porous plate are fixedly mounted on the front baffle and the rear baffle respectively; the air blowing device is provided with a plurality of nozzles, and each nozzle corresponds to one filter bag monomer and is arranged at the upper opening end of the filter bag monomer.
8. The system according to any one of claims 1 or 4, wherein the water-cooled scraper is provided with a water supply port and a water return port which are respectively connected to the waste heat boiler through pipelines.
9. An integrated method for removing dust and nitrate from a waste incinerator, which is realized based on the system of any one of claims 1 to 8, and comprises the following steps:
flue gas generated by the garbage incinerator enters the horizontal flue, and is cooled after heat exchange by a plurality of superheaters; in the area with the temperature of 300-450 ℃ in the flue, the flue gas enters a dust and nitrate removing device from an air inlet channel or is introduced into an equivalent cloth bag filter; the dust and nitrate removing device or the cloth bag filter keeps the temperature condition of 300-450 ℃, the temperature difference between the air inlet channel and the air outlet channel is less than 15 ℃, and the pressure difference is less than 1000pa; in a dust and nitrate removal device or a cloth bag filter, firstly filtering flue gas by a cloth bag and intercepting dust, and then carrying out denitration catalytic reaction on the flue gas subjected to dust removal by a catalyst filling layer; the air injection device injects air regularly to separate dust on the surface of the filter bag, and the water-cooled scraper conveyor removes the falling dust and sends the dust out of the system through a slag discharge pipe; and finally, the flue gas subjected to the dust and nitrate removal enters a flue gas purification system for washing or adsorption treatment after heat exchange of a heat exchanger.
10. The method according to claim 9, wherein the catalyst filling layer is filled with a selective catalytic reduction catalyst capable of converting nitrogen oxides in flue gas into water and nitrogen at a temperature of 300-450 ℃ for denitration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211450735.5A CN115722005A (en) | 2022-11-18 | 2022-11-18 | Integrated dust and nitrate removing system and method for garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211450735.5A CN115722005A (en) | 2022-11-18 | 2022-11-18 | Integrated dust and nitrate removing system and method for garbage incinerator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701702A (en) * | 2009-10-20 | 2010-05-05 | 创冠环保(中国)有限公司 | Waste incineration heat recovery boiler |
| CN209386314U (en) * | 2018-09-26 | 2019-09-13 | 上海东化环境工程有限公司 | A kind of processing system for acrylic nitrile waste water |
| CN210165349U (en) * | 2019-05-30 | 2020-03-20 | 石棉县东顺锌业有限责任公司 | Exhaust-heat boiler on secondary zinc oxide production line |
| CN211925773U (en) * | 2020-03-30 | 2020-11-13 | 福建远致环保科技有限公司 | Flue gas deacidification dust, nitre and oxazole integrated treatment system for garbage incinerator |
| CN115307154A (en) * | 2022-06-29 | 2022-11-08 | 成都易态科技有限公司 | Method and device for purifying waste incineration flue gas |
-
2022
- 2022-11-18 CN CN202211450735.5A patent/CN115722005A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701702A (en) * | 2009-10-20 | 2010-05-05 | 创冠环保(中国)有限公司 | Waste incineration heat recovery boiler |
| CN209386314U (en) * | 2018-09-26 | 2019-09-13 | 上海东化环境工程有限公司 | A kind of processing system for acrylic nitrile waste water |
| CN210165349U (en) * | 2019-05-30 | 2020-03-20 | 石棉县东顺锌业有限责任公司 | Exhaust-heat boiler on secondary zinc oxide production line |
| CN211925773U (en) * | 2020-03-30 | 2020-11-13 | 福建远致环保科技有限公司 | Flue gas deacidification dust, nitre and oxazole integrated treatment system for garbage incinerator |
| CN115307154A (en) * | 2022-06-29 | 2022-11-08 | 成都易态科技有限公司 | Method and device for purifying waste incineration flue gas |
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