CN110898577A - Dust removal method for dry tail gas in artificial board production - Google Patents
Dust removal method for dry tail gas in artificial board production Download PDFInfo
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- CN110898577A CN110898577A CN201911224211.2A CN201911224211A CN110898577A CN 110898577 A CN110898577 A CN 110898577A CN 201911224211 A CN201911224211 A CN 201911224211A CN 110898577 A CN110898577 A CN 110898577A
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- B01D47/06—Spray cleaning
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Abstract
The invention relates to the field of tail gas treatment in the artificial board industry, in particular to a dust removal method for dry tail gas in artificial board production, which comprises the following steps: carrying out primary spraying dust removal treatment on the dust-containing waste gas entering the gas inlet pipe by adopting a forward spraying mode; step two: further collecting the waste gas subjected to the first spraying and dust removing treatment, entering a spraying tower, and performing second spraying and dust removing in the spraying tower; step three: the wastewater and dust generated by the first spray dust removal and the second spray dust removal are discharged into a wastewater tank through a sewage discharge outlet; step four: treating wastewater, namely separating dust particles and fibers in the wastewater by impurities in the wastewater through an air flotation machine, feeding the separated dust and fibers into a sludge tank, and feeding supernatant into a circulating tank; step five: and dehydrating the dust and the fibers in the sludge tank by a dehydrator, pressing the dehydrated dust and the dehydrated fibers into mud cakes, and feeding the mud cakes serving as fuel into a boiler for combustion treatment. The method has the advantages of high dust removal efficiency, good dust removal efficiency and low operation cost.
Description
Technical Field
The invention relates to the field of dry tail gas treatment in the artificial board industry, in particular to a dust removal method for dry tail gas in artificial board production.
Background
With the continuous development of social economy, air pollution is increasingly serious, and the working and living environments of people are increasingly worsened, so that the requirements of people on the quality of living environments are higher and higher. At present, the protection of the environment is well known, and therefore, the purification of the waste gas generated in industry is required to prevent the pollution of the waste gas to the air. The tail gas emission of the existing artificial board factory is basically self-emission, and the components of the dry tail gas are not controlled. The main components of the tail gas from the production and drying of the artificial boards are fiber dust, formaldehyde, Volatile Organic Compounds (VOC) and odor, and the tail gas from the production and drying of the artificial boards has high gas content, high dust content, high nitrogen oxides and high temperature, and can cause serious pollution to the environment. The gas treatment technology in the current market has the defects of complex equipment, high investment, high operating cost and the like for treating the dry tail gas in the production of artificial boards with the characteristics of large gas quantity, high dust content, high temperature, high organic matter concentration and the like, and is difficult to reach the standard. The imported technology from abroad adds frost to the snow in the artificial board industry which originally belongs to the micro-profit operation because of higher equipment cost and high operation cost.
At present, a dry production process is mainly adopted for fiber boards and particle boards, and a large amount of tail gas and waste gas, VOC, particulate matters and other main pollutants are discharged in a fiber drying section. Each cubic meter of dry tail gas contains 100-600 mg of dust, more than 50mg of formaldehyde, more than 20mg of phenols, 20-50mg of organic carbon, 200-800 mg of aerosol, nitrogen oxides and other waste gases; causing serious pollution to the environment, and the tail gas of the system must be purified for the purpose.
The Chinese patent with application number 201510313937.9 discloses a method for treating waste gas in the artificial board industry and a treatment device thereof, wherein the waste gas is guided into a washing tower for spraying treatment and then directly discharged outside, and spray liquid is collected, obviously, the humidity of the waste gas directly discharged outside is higher, so that the use amount of water is higher, the operation cost is higher, and the requirement of new national standard is difficult to meet.
The Chinese patent with application number of CN201810228949.5 discloses a method for treating dry tail gas in artificial board industry and a treatment device thereof, wherein dust removal, dehumidification and odor removal are achieved by adopting pre-spraying treatment and wet electric dust removal treatment, and only one-time spraying treatment is carried out in the spraying treatment stage.
Therefore, in order to solve the problems, a new method for removing dust from the dry tail gas in the production of the artificial board is needed.
Disclosure of Invention
In view of the above, the present invention aims to overcome the defects in the prior art, and provides a dust removal method for dry tail gas in artificial board production, which can achieve the dust removal effect by spraying twice in the spraying treatment stage.
In order to achieve the purpose, the invention provides the following technical scheme: the invention discloses a dust removal method for dry tail gas in artificial board production, which comprises the following steps:
the method comprises the following steps: introducing the dust-containing waste gas into an air inlet pipe of a tail gas treatment device, and carrying out primary spraying dust removal treatment on the waste water in the air inlet pipe;
step two: collecting the dust-containing waste gas subjected to the first spraying dust removal treatment, feeding the dust-containing waste gas into a spraying tower of a tail gas treatment device, and performing second spraying dust removal in the spraying tower;
step three: and the wastewater and dust generated by the first spraying and dust removal and the second spraying and dust removal are discharged into a wastewater tank through a sewage discharge outlet of the wastewater treatment device.
Further, still include: step four: separating dust particles and fibers in the wastewater and the dust in the wastewater tank by an air floatation machine, feeding the separated dust and fibers into a sludge tank, and feeding the supernatant into a circulating tank for spraying and recycling;
step five: and dehydrating the dust and the fibers in the sludge tank by a dehydrator, pressing the dehydrated dust and the fibers into mud cakes, feeding the mud cakes serving as fuel into a boiler for combustion treatment, and feeding the dehydrated water into a circulating water tank for recycling.
Further, the wastewater treatment device comprises the air inlet pipe, a spray tower, a sewage drain outlet arranged at the lower end of the spray tower and an exhaust outlet arranged at the upper end of the spray tower; the air inlet pipe, the sewage draining outlet and the air exhaust port are communicated with the spray tower, the air inlet pipe is provided with a plurality of layers of spray pipes, and the spray tower is provided with a plurality of layers of spray pipes.
Furthermore, the spray pipes in the air inlet pipe are at least provided with two layers.
Furthermore, the spray pipes in the spray tower are at least provided with two layers.
Furthermore, the number of the air inlet pipes is at least two, and the air inlet pipes are respectively communicated with the spray tower.
Furthermore, the spraying direction of the plurality of layers of spraying pipes in the air inlet pipe is the same as the airflow direction of the dust-containing waste gas in the air inlet pipe, so that forward spraying type dust removal is formed.
Furthermore, in the air inlet pipe, a plurality of layers of spray pipes form a water film after spraying, the dust-containing waste gas passes through the water film to form a first water film for spraying and dedusting, in the spray tower, a plurality of layers of spray pipes form a water film after spraying, and the dust-containing waste gas passes through the water film to form a second water film for spraying and dedusting.
Compared with the prior art, the invention has the beneficial effects that:
1. the dust removal efficiency is 10-15% higher than that of the traditional technology. The traditional water film dedusting has the treatment efficiency of tail gas in artificial board production of only 75-80%, and the technology can reach 85-95%.
2. The technology of the invention has low energy consumption which is 60 percent of that of the traditional process, and the energy consumption is saved by 40 percent. Compared with the foreign technology of the same type, the energy is saved by 70 percent.
3. The air inlet pipe adopts a forward spraying mode, the novel technology has no blocking phenomenon, and the traditional process is easy to block a spray head.
4. The supernatant enters a circulating pool for recycling, so that water resources are saved, the water consumption of the technology is 60% of that of the traditional technology, and the water resources are saved.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. air inlet pipe, 2 spray tower, 3 exhaust port, 4 sewage drain.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of the invention, in which arrows in an air inlet pipe and a spray tower are the moving direction of waste gas, and the arrow direction at a sewage discharge port is the flowing direction of sewage. The dust removal method for the dry tail gas generated in the production of the artificial board in the embodiment comprises the following steps of:
the method comprises the following steps: introducing the dust-containing waste gas into an air inlet pipe 1 of a waste water treatment device, and carrying out primary spraying dust removal treatment on the waste water in the air inlet pipe 1;
step two: collecting the dust-containing waste gas subjected to the first spraying and dedusting treatment, feeding the dust-containing waste gas into a spraying tower 2 of the tail gas treatment device, and performing second spraying and dedusting in the spraying tower 2;
step three: the dust-containing wastewater generated by the first spraying and dust removal and the second spraying and dust removal is discharged into a wastewater tank through a sewage discharge outlet 4 of the wastewater treatment device.
In this embodiment, the method further includes: step four: separating dust particles and fibers in the wastewater containing dust in the wastewater tank by an air flotation machine, feeding the separated dust and fibers into a sludge tank, and feeding the supernatant into a circulating tank for spraying and recycling;
step five: and dehydrating the dust and the fibers in the sludge tank by a dehydrator, pressing the dehydrated dust and the dehydrated fibers into mud cakes, and feeding the mud cakes serving as fuel into a boiler for combustion treatment.
In the embodiment, the wastewater treatment device comprises the gas inlet pipe 1, a spray tower 2, a sewage drain outlet 4 arranged at the lower end of the spray tower, and an exhaust port arranged at the upper end of the spray tower 2; the air inlet pipe 1, the sewage draining outlet 4 and the air exhaust port are communicated with the spray tower 2, the air inlet pipe 1 is provided with a plurality of layers of spray pipes, and the spray tower 2 is provided with a plurality of layers of spray pipes.
In the dust removal process to waste gas, spray for the first time and remove dust and handle and adopt in the same direction as spouting the pattern, can avoid the jam of shower nozzle, clear away most dust, waste gas further gathers and gets into spray column 2 again, clears up the dust in the waste gas once more, through the spray processing back of second time, the dust treatment in the waste gas is very clean, and its dust collection efficiency can reach 85% -95%, reaches the emission standard of national dust granule completely. And finally, discharging the tail gas through an exhaust port, and treating the wastewater to achieve the standard or recycle. The dust removal efficiency of the invention is 10-15% higher than that of the traditional technology. The traditional water film dedusting has the treatment efficiency of tail gas in artificial board production of only 75-80%, and the technology can reach 85-95%. The technology of the invention has low energy consumption which is 60 percent of that of the traditional process, and the energy consumption is saved by 40 percent. Compared with the foreign technology of the same type, the energy is saved by 70 percent. The forward spraying type is adopted in the air inlet pipe 1, the novel technology has no blocking phenomenon, and the traditional process is easy to block the spray tower 2 and the spray head. Supernatant liquid enters the circulating tank in the wastewater treatment process for recycling, so that water resources are saved, the water consumption of the technology is 60% of that of the traditional technology, and water resources are saved.
The waste water contains a large amount of dust and fibers, and organic matters such as organic matters, resin sizing materials, formaldehyde, lignin and the like. Impurities in the wastewater are separated from dust particles and fibers in the wastewater through an air flotation machine, the separated dust and fibers enter a sludge tank, and supernatant enters a circulating tank for spraying and recycling. And dehydrating the dust and the fibers in the sludge tank by a dehydrator, pressing the dust and the fibers into mud cakes, and feeding the mud cakes serving as fuel into a boiler for combustion treatment. The wastewater from the dehydrator is discharged into a sewage pool for recycling, and can also be discharged into a sewage treatment plant for water treatment.
In this embodiment, the number of the spray pipes in the air inlet pipe 1 is at least two, and because the spray pipes adopt the forward spraying, the airflow pressure drop is very small, and the spray heads are not easy to block.
In this embodiment, the spray pipes in the spray tower 2 are provided with at least two layers.
In this embodiment, the number of the air inlet pipes 1 is at least two, and the air inlet pipes 1 are respectively communicated with the spray tower 2.
In this embodiment, the spraying direction of a plurality of layers of shower pipes in intake pipe 1 is the same with the air current direction of the dust-containing waste gas in intake pipe 1, forms in the same direction as spraying the type dust removal, adopts in the same direction as spraying the type, avoids the jam of shower nozzle, clears away most dust.
In this embodiment, in the intake pipe 1, a plurality of layers of spray pipes form a water film after spraying, the dust-containing waste gas passes through the water film to form a first water film for spraying and dedusting, in the spray tower 2, a plurality of layers of spray pipes form a water film after spraying, and the dust-containing waste gas passes through the water film to form a second water film for spraying and dedusting.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. The dust removing method for the dry tail gas in the production of the artificial board is characterized by comprising the following steps: comprises that
The method comprises the following steps: introducing the dust-containing waste gas into an air inlet pipe of a tail gas treatment device, and carrying out primary spraying dust removal treatment on the waste gas in the air inlet pipe;
step two: collecting the dust-containing waste gas subjected to the first spraying dust removal treatment, feeding the dust-containing waste gas into a spraying tower of a tail gas treatment device, and performing second spraying dust removal in the spraying tower;
step three: and the wastewater and dust generated by the first spraying and dust removal and the second spraying and dust removal are discharged into a wastewater tank through a sewage discharge outlet of the wastewater treatment device.
2. The artificial board production drying tail gas dedusting method according to claim 3, characterized in that: further comprising: step four: waste water and dust in the waste water tank are subjected to slag-water separation of dust particles and fibers in the waste water through an air flotation machine, the separated dust and fibers enter a sludge tank, and supernatant enters a circulating tank for spraying and recycling;
step five: and dehydrating the dust and the fibers in the sludge tank by a dehydrator, pressing the dehydrated dust and the dehydrated fibers into mud cakes, and feeding the mud cakes serving as fuel into a boiler for combustion treatment.
3. The artificial board production drying tail gas dedusting method according to claim 1, characterized in that: the tail gas treatment device comprises the gas inlet pipe, a spray tower, a sewage drain outlet arranged at the lower end of the spray tower and an exhaust outlet arranged at the upper end of the spray tower; the air inlet pipe, the sewage draining outlet and the air exhaust port are communicated with the spray tower, the air inlet pipe is provided with a plurality of layers of spray pipes, and the spray tower is provided with a plurality of layers of spray pipes.
4. The artificial board production drying tail gas dedusting method according to claim 3, characterized in that: the spray pipes in the air inlet pipe are at least provided with two layers.
5. The artificial board production drying tail gas dedusting method according to claim 3, characterized in that: the spray pipes in the spray tower are at least provided with two layers.
6. The artificial board production drying tail gas dedusting method according to claim 3, characterized in that: the air inlet pipe is at least provided with two, and the air inlet pipe is communicated with the spray tower.
7. The artificial board production drying tail gas dedusting method according to claim 3, characterized in that: the spraying direction of the plurality of layers of spraying pipes in the air inlet pipe is the same as the airflow direction of the dust-containing waste gas in the air inlet pipe, so that forward spraying type dust removal is formed.
8. The artificial board production drying tail gas dedusting method according to claim 3, characterized in that: in the air inlet pipe, a plurality of layers of spray pipes form a water film after spraying, the dust-containing waste gas passes through the water film to form a first water film for spraying and dedusting, in the spray tower, a plurality of layers of spray pipes form a water film after spraying, and the dust-containing waste gas passes through the water film to form a second water film for spraying and dedusting.
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| CN201911224211.2A CN110898577A (en) | 2019-12-04 | 2019-12-04 | Dust removal method for dry tail gas in artificial board production |
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| CN201911224211.2A CN110898577A (en) | 2019-12-04 | 2019-12-04 | Dust removal method for dry tail gas in artificial board production |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111349A (en) * | 2020-01-16 | 2020-05-08 | 广西金科环境工程有限公司 | Process and equipment for treating tail gas generated in production of artificial board |
| CN111672279A (en) * | 2020-05-11 | 2020-09-18 | 北京航天试验技术研究所 | Gas absorbing device for liquid rocket engine ground test |
| CN115430522A (en) * | 2022-09-28 | 2022-12-06 | 广西金科环境工程有限公司 | Tail gas dust removal treatment method in artificial board production and manufacturing process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749944A (en) * | 1997-03-11 | 1998-05-12 | Eastman Chemical Company | Process and apparatus for the removal of dimethyl ester vapors or particles emitted during the storage of dimethyl esters |
| CN201807279U (en) * | 2010-10-13 | 2011-04-27 | 中国石油化工股份有限公司 | High-efficiency flue gas dust-removal desulfurization device |
| CN205287978U (en) * | 2015-12-30 | 2016-06-08 | 山东瑞嘉通风环保科技有限公司 | Brick and tile kiln dust removal desulfurizing tower |
| CN206881435U (en) * | 2017-06-26 | 2018-01-16 | 哥乐巴环保科技(上海)有限公司 | A kind of MDF dries exhaust gas processing device |
| CN109012001A (en) * | 2018-09-20 | 2018-12-18 | 济宁荣晟环保科技有限公司 | A kind of wood-based plate whirlwind exhaust gas purification system |
-
2019
- 2019-12-04 CN CN201911224211.2A patent/CN110898577A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749944A (en) * | 1997-03-11 | 1998-05-12 | Eastman Chemical Company | Process and apparatus for the removal of dimethyl ester vapors or particles emitted during the storage of dimethyl esters |
| CN201807279U (en) * | 2010-10-13 | 2011-04-27 | 中国石油化工股份有限公司 | High-efficiency flue gas dust-removal desulfurization device |
| CN205287978U (en) * | 2015-12-30 | 2016-06-08 | 山东瑞嘉通风环保科技有限公司 | Brick and tile kiln dust removal desulfurizing tower |
| CN206881435U (en) * | 2017-06-26 | 2018-01-16 | 哥乐巴环保科技(上海)有限公司 | A kind of MDF dries exhaust gas processing device |
| CN109012001A (en) * | 2018-09-20 | 2018-12-18 | 济宁荣晟环保科技有限公司 | A kind of wood-based plate whirlwind exhaust gas purification system |
Non-Patent Citations (1)
| Title |
|---|
| 连之伟主编: "《热质交换原理与设备》", 30 September 2001, 中国建筑工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111349A (en) * | 2020-01-16 | 2020-05-08 | 广西金科环境工程有限公司 | Process and equipment for treating tail gas generated in production of artificial board |
| CN111672279A (en) * | 2020-05-11 | 2020-09-18 | 北京航天试验技术研究所 | Gas absorbing device for liquid rocket engine ground test |
| CN115430522A (en) * | 2022-09-28 | 2022-12-06 | 广西金科环境工程有限公司 | Tail gas dust removal treatment method in artificial board production and manufacturing process |
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