CN214513744U - Hazardous waste high temperature burns flue gas wet process deacidification device - Google Patents
Hazardous waste high temperature burns flue gas wet process deacidification device Download PDFInfo
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- CN214513744U CN214513744U CN202120625994.1U CN202120625994U CN214513744U CN 214513744 U CN214513744 U CN 214513744U CN 202120625994 U CN202120625994 U CN 202120625994U CN 214513744 U CN214513744 U CN 214513744U
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Abstract
The utility model relates to a hazardous waste high temperature burns flue gas wet process deacidification device, including the primary washing tower, second grade scrubbing tower and circulating water pool, pass through the pipeline intercommunication above primary washing tower and the second grade scrubbing tower, the primary washing tower lower extreme is provided with inlet channel, the second grade scrubbing tower lower extreme is provided with air outlet channel, set up a plurality of spray layers in primary washing tower and the second grade scrubbing tower, be provided with the shower head in the spray layer, a plurality of spray layers all correspond to be provided with the cloth wind board below, the primary washing tower and second grade scrubbing tower lower extreme still are provided with circulating water pipe, be provided with inlet channel and outlet conduit on the circulating water pool, inlet channel and circulating water pipe are linked together, outlet conduit is linked together with a plurality of shower heads respectively, be provided with PH meter and conductivity meter in the circulating water pool; the device not only can remove the acid gas in the flue gas with higher efficiency, effectively monitors the pH and the conductivity in the circulating washing water, but also can reduce the frequency of producing crystalline salt in the washing tower, and prolongs the operation period of the incineration system.
Description
Technical Field
The utility model relates to a hazardous waste high temperature burns deals with the gas cleaning field, especially relates to hazardous waste high temperature burns flue gas wet process deacidification device.
Background
With the release of GB18484-2020 pollution control Standard for hazardous waste incineration, the standard of tail gas emission of the incineration system becomes stricter. High-temperature flue gas generated after the incineration of hazardous wastes needs to be subjected to dust removal, waste gas removal and the like through multiple steps. The flue gas is subjected to heat exchange by a waste heat boiler to 500-550 ℃ and then enters a quenching tower, and then is further deacidified and heavy metal removed by activated carbon and slaked lime in a dry deacidification tower. And the flue gas from the dry deacidification tower enters a bag-type dust remover for dust removal and then enters a wet deacidification tower for further removing acid gas. Then the flue gas passes through a flue gas reheater and is discharged outside by a chimney.
The general wet deacidification tower adopts a first-stage wet washing tower, and the washing tower is filled with fillers to prolong the contact time of alkaline absorption liquid and acidic gas so as to achieve the effect of fully removing acid. In the wet filler deacidification tower, acid gas reacts with alkaline absorption liquid to produce salt-containing wastewater, once the washing circulating water is not controlled in place, the salt content of the washing water in the washing tower is too high, and the formation of crystal salt is accelerated along with the evaporation of water under high-temperature flue gas. Thereby causing the formation of crystallized salt in the packed column and plugging the packed column. The normal operation of the system and the over-standard emission of smoke can be influenced in serious cases, and the operation cost is increased due to the fact that the furnace is shut down to clean the salt slag.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hazardous waste high temperature burns flue gas wet process deacidification device has solved the problem that produces salt crystallization phenomenon and block up the scrubbing tower among the current wet process deacidification device in the scrubbing tower.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a flue gas wet deacidification device for high-temperature incineration of hazardous wastes, which comprises a washing tower and a circulating water tank, the washing tower comprises a first-stage washing tower and a second-stage washing tower, the upper parts of the first-stage washing tower and the second-stage washing tower are communicated through a pipeline, the lower end of the first-stage washing tower is provided with an air inlet channel, the lower end of the second-stage washing tower is provided with an air outlet channel, a plurality of spraying layers are arranged in the first-stage washing tower and the second-stage washing tower, spraying heads are arranged in the spraying layers, air distribution plates are correspondingly arranged below the spraying layers, the lower ends of the first-stage washing tower and the second-stage washing tower are also provided with circulating water pipes, a water inlet pipeline and a water outlet pipeline are arranged on the circulating water tank, the water inlet pipeline is communicated with a circulating water pipe, the water outlet pipeline is respectively communicated with the plurality of spray heads, and a PH meter and a conductivity meter are arranged in the circulating water tank.
Preferably, a baffle plate demister is arranged in the secondary washing tower.
Preferably, the tower bodies of the first-stage washing tower and the second-stage washing tower are cylindrical tower bodies.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model discloses a dangerous waste high temperature incineration flue gas wet deacidification device, which comprises a spray tower and a circulating water tank, wherein the spray tower comprises a first-stage washing tower and a second-stage washing tower, the tops of the first-stage washing tower and the second-stage washing tower are communicated through a pipeline, so that flue gas is transited from the first-stage washing tower to the second-stage washing tower, a multilayer spray system is arranged in each of the first-stage washing tower and the second-stage washing tower, the lower ends of the first-stage spray tower and the second-stage spray tower are respectively provided with an air inlet channel and an air outlet channel, smoke enters from the air inlet channel and is discharged from the air outlet channel after deacidification of the spray tower, the circulating water tank is provided with an water inlet pipeline and a water outlet pipeline, the water inlet pipeline is connected with a water outlet pipe below the spray tower and is used for receiving sprayed water, the water outlet pipeline is connected with the spray system in the spray tower and is used for supplying water, the circulating water tank is provided with a PH meter and a conductivity meter for constantly monitoring the PH value and the conductivity of the water in the circulating water tank, wherein the pH value and the conductivity are controlled within a certain range, and when the pH value is lower than 7, alkali liquor needs to be supplemented in time; when the conductivity exceeds 60 ms/cm, it is necessary to timely drain a part of the washing water and add fresh water to reduce the soluble total solids in the washing water, and to avoid the formation of crystallized salts in the washing tower. The two-stage spray tower can be used for full deacidification, the deacidification efficiency is higher than 99%, the device can be used for removing the acid gas in the flue gas with higher efficiency, the pH value and the conductivity in the circulating washing water can be effectively monitored, the frequency of producing crystallized salt in the washing tower can be reduced, and the operation period of an incineration system is prolonged.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
Wherein the reference numerals are as follows:
1. a first stage spray tower; 2. a secondary spray tower; 3. a pipeline; 4. a baffle demister; 5. a spray layer; 7. A shower head; 8. a wind distribution plate; 9. a circulating water pipe; 10. a circulating water tank; 11. a pH meter; 12. a conductivity meter; 13. a water inlet pipe; 14. a water outlet pipeline.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the utility model discloses a washing tower and circulating water pond, washing tower include one-level washing tower 1 and second grade washing tower 2, and one-level washing tower 1 and second grade washing tower 2 top are linked together through pipeline 3, and pipeline 3 is arranged in the flue gas from one-level washing tower 1 transfer to second grade washing tower 2, and one-level washing tower 1 and second grade washing tower 2 are the cylinder tower body, more accord with gaseous flow direction. All be provided with a plurality of layers 5 that spray in one-level scrubbing tower 1 and the second grade scrubbing tower 2, spray and be provided with a plurality of shower heads 7 in the layer 5, be provided with alkaline washing liquid in the shower head 7, the below of spraying layer 5 is provided with air distribution plate 8, and air distribution plate 8 makes the flue gas flow in the tower evenly, guarantees to be the form of dispersing and up or down fully contacts through whole tower body and washing liquid. The lower ends of the first-stage washing tower 1 and the second-stage washing tower 2 are respectively provided with an air inlet channel and an air outlet channel, smoke enters from the air inlet channel, vertically upwards sprays through the first-stage washing tower, enters the second-stage spray tower, and is sprayed through the second-stage spray tower and then is discharged from the air outlet channel.
The upper part of the second-stage washing tower 2 is provided with a baffle plate demister 4, the baffle plate demister 4 can effectively reduce the water carrying amount of the flue gas, and more than 90% of liquid water drops larger than 5 mu can be removed from the flue gas flow through the demister. The demister is provided with a washing spray head, and high-pressure clean water can be sprayed intermittently to clean the demister so as to remove salt substances possibly deposited on the demister.
The lower ends of the first-stage washing tower 1 and the second-stage washing tower 2 are further provided with a circulating water pipe 9, the circulating water pipe 9 is used for enabling used water in the spray tower to flow out, a water inlet pipeline 13 and a water outlet pipeline 14 are arranged on the circulating water tank 10, the water inlet pipeline 13 is communicated with the circulating water pipe 9 and used for receiving washing water, the water outlet pipeline 14 is communicated with spray heads 7 on the first-stage washing tower 1 and the second-stage washing tower 2 in a homogeneous phase mode and used for recycling the spraying water, a PH meter 11 and a conductivity meter 12 are arranged in the circulating water tank 10, and PH and conductivity of the circulating washing water are monitored on line. Wherein the pH is controlled between 8 and 9, the conductivity is controlled within 60 ms/cm, and when the pH is lower than 7, alkali liquor needs to be supplemented in time; when the conductivity exceeds 60 ms/cm, it is necessary to timely drain a part of the washing water and add fresh water to reduce the soluble total solids in the washing water, and to avoid the formation of crystallized salts in the washing tower.
When the device is used specifically, the first-stage washing tower 1 adopts a countercurrent washing process, 3 layers of spraying systems are arranged, smoke flows upwards from the bottom of the tower, air distribution plates are arranged below the washing spraying layers, so that the smoke flows uniformly in the tower and is guaranteed to be in a divergent shape and vertically upwards to fully contact with washing liquid through the whole tower body, in the process, acid gas is absorbed by alkali liquor to complete the deacidification process of the first-stage washing tower 1, and the deacidification efficiency of the second-stage washing tower 2 is more than 85%; the second-stage washing tower 2 adopts a downstream washing process, and is also provided with 3 layers of spraying systems, smoke flows downwards from the top of the tower, enters the top of the washing tower in a divergent shape, and then continues to vertically downwards pass through the whole tower body, in the process, acid gas is absorbed by alkali liquor to complete the deacidification process of the second-stage washing tower 2, and the deacidification efficiency of the second-stage washing tower 2 is more than 99%; and finally, discharging the delay, wherein the PH meter 11 and the conductivity meter 12 in the circulating water tank monitor the information of the washing water at any time, so that the frequency of producing crystallized salt in the washing tower is reduced, and the operation period of the incineration system is prolonged.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (3)
1. A wet deacidification device for high-temperature incineration flue gas of hazardous wastes, which is characterized by comprising a washing tower and a circulating water tank, the washing tower comprises a first-stage washing tower and a second-stage washing tower, the upper parts of the first-stage washing tower and the second-stage washing tower are communicated through a pipeline, the lower end of the first-stage washing tower is provided with an air inlet channel, the lower end of the second-stage washing tower is provided with an air outlet channel, a plurality of spraying layers are arranged in the first-stage washing tower and the second-stage washing tower, spraying heads are arranged in the spraying layers, air distribution plates are correspondingly arranged below the spraying layers, the lower ends of the first-stage washing tower and the second-stage washing tower are also provided with circulating water pipes, a water inlet pipeline and a water outlet pipeline are arranged on the circulating water tank, the water inlet pipeline is communicated with a circulating water pipe, the water outlet pipeline is respectively communicated with the plurality of spray heads, and a PH meter and a conductivity meter are arranged in the circulating water tank.
2. The hazardous waste high-temperature incineration flue gas wet deacidification device according to claim 1, wherein: and a baffle plate demister is arranged in the secondary washing tower.
3. The hazardous waste high-temperature incineration flue gas wet deacidification device according to claim 1, wherein: the tower bodies of the first-stage washing tower and the second-stage washing tower are cylindrical tower bodies.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120625994.1U CN214513744U (en) | 2021-03-29 | 2021-03-29 | Hazardous waste high temperature burns flue gas wet process deacidification device |
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| CN202120625994.1U CN214513744U (en) | 2021-03-29 | 2021-03-29 | Hazardous waste high temperature burns flue gas wet process deacidification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445356A (en) * | 2022-09-21 | 2022-12-09 | 江化微(镇江)电子材料有限公司 | Electronic-grade sulfuric acid workshop tail gas treatment device and use method |
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2021
- 2021-03-29 CN CN202120625994.1U patent/CN214513744U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445356A (en) * | 2022-09-21 | 2022-12-09 | 江化微(镇江)电子材料有限公司 | Electronic-grade sulfuric acid workshop tail gas treatment device and use method |
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