CN210332087U - Flue gas rapid cooling dust collector - Google Patents
Flue gas rapid cooling dust collector Download PDFInfo
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- CN210332087U CN210332087U CN201921001954.9U CN201921001954U CN210332087U CN 210332087 U CN210332087 U CN 210332087U CN 201921001954 U CN201921001954 U CN 201921001954U CN 210332087 U CN210332087 U CN 210332087U
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Abstract
The utility model relates to the field of chemical environmental protection machinery, in particular to a flue gas quenching and dust removing device, which comprises a cooler tower body, wherein the top of the tower body is provided with a flue gas inlet, a first-level spray device is arranged below the flue gas inlet, a liquid recovery cavity is arranged at the lower part of the tower body, a flue gas outlet is arranged on the side wall of the tower body above the liquid recovery cavity, a third-level spray device is arranged in the tower body above the flue gas outlet, and a second-level spray device is arranged in the tower body between the first-level spray device and the third-; by adopting the flue gas quenching and dedusting device with the structure, the flue gas is rapidly cooled by the cooling liquid containing alkali after entering the device, and the temperature of the flue gas is finally reduced to 60-80 ℃ through the cooling of the secondary and tertiary spray devices, the cooling effect is far higher than that of the existing dry cooling device, the generation of harmful substances such as dioxin and the like can be effectively avoided, the adopted cooling liquid can be recycled, and the win-win of environmental protection and economic benefit is achieved.
Description
Technical Field
The utility model relates to a chemical industry environmental protection machinery field, in particular to flue gas rapid cooling dust collector of the flue gas that produces in the discarded object schizolysis technology.
Background
As is known, cracking is a chemical process of converting one sample (mainly referred to as a high molecular compound) into another several substances (mainly referred to as a low molecular compound) by using only heat energy, and not only does cracking find a good solution for the treatment of a large amount of wastes (such as waste plastics, waste rubber, and the like) generated in modern society, but also provides a new scheme for resource reduction and energy shortage improvement, can provide a large amount of basic industrial raw materials and energy sources, such as carbon black, iron wires, combustible oil gas, and the like, and is one of means for solving various resource crises in the future. In addition to the above products, a certain amount of flue gas can be generated in the cracking process, the components of the flue gas are complex, wherein the flue gas has not only recyclable components but also components harmful to the environment, and the flue gas has large heat, so that other reactions are easy to occur in the treatment process, for example, carcinogens such as dioxin and the like are easy to generate when the cooling speed is slow; besides the pyrolysis flue gas, flue gas from other sources has the same problem and has a large influence on the environment.
In the prior art, single-stage water cooling is generally adopted for cooling flue gas, heat in the flue gas is absorbed by cooling water, and finally water vapor and the flue gas are discharged together, the method is generally called dry treatment, the cooling effect of the method is poor, the temperature of the discharged flue gas can only reach about 200 ℃, the standard emission of the flue gas can be ensured only by continuous treatment of subsequent processes, acidic substances such as sulfur dioxide and the like contained in the flue gas are difficult to remove by water, a large amount of acidic waste water and waste gas can be formed after the flue gas and the water vapor are discharged, and greater difficulty is added to the subsequent treatment, so that the existing dry treatment process and equipment for the flue gas are difficult to meet the treatment requirements of the flue gas, and a brand new device is urgently needed for realizing harmless cooling treatment of the flue gas.
Disclosure of Invention
Based on a plurality of defects in the prior art, the utility model provides a flue gas quenching and dust removing device, which comprises a cooler tower body, wherein the top of the tower body is provided with a flue gas inlet, a first-stage spray device is arranged below the flue gas inlet, a liquid recovery cavity is arranged at the lower part of the tower body, a flue gas outlet is arranged on the side wall of the tower body above the liquid recovery cavity, a third-stage spray device is arranged in the tower body above the flue gas outlet, and a second-stage spray device is arranged in the tower body between the first-stage spray device and the third-stage spray; by adopting the flue gas quenching and dedusting device with the structure, the flue gas is rapidly cooled by the cooling liquid containing alkali after entering the device, and the temperature of the flue gas is finally reduced to 60-80 ℃ through the cooling of the secondary and tertiary spray devices, the cooling effect is far higher than that of the existing dry cooling device, the generation of harmful substances such as dioxin and the like can be effectively avoided, the adopted cooling liquid can be recycled, and the win-win of environmental protection and economic benefit is achieved.
The flue gas quenching and dedusting device provided by the utility model mainly realizes rapid cooling of flue gas through the primary spray device at the front end, avoids the flue gas from staying too long in the same high-temperature region so as to reduce the generation of substances such as dioxin, and finally reduces the temperature of the flue gas to 60-80 ℃ by utilizing the cooling of the secondary spray device and the tertiary spray device, thereby achieving the technical goal which is difficult to realize in the prior art and being more suitable for the treatment of the flue gas;
the utility model discloses a concrete technical scheme is:
a flue gas quenching dust removal device comprises a cooler tower body, wherein a flue gas inlet is formed in the top of the cooler tower body, a primary spraying device is arranged below the flue gas inlet, a liquid recovery cavity is formed in the lower portion of the tower body, a flue gas outlet is formed in the side wall of the tower body above the liquid recovery cavity, a tertiary spraying device is arranged in the tower body above the flue gas outlet, and a secondary spraying device is arranged in the tower body between the primary spraying device and the tertiary spraying device;
the primary spraying device comprises a primary spraying pipe and a primary spraying head arranged below the front end of the spraying pipe, and the primary spraying head is arranged right below the flue gas inlet; in addition, the spray head can even be directly arranged in the smoke inlet without considering the processing difficulty;
the secondary spraying device comprises a secondary central spraying pipe and a secondary circumferential spraying pipe, a central spraying head below the front end of the secondary central spraying pipe and a primary spraying head are arranged on the same vertical axis, the secondary circumferential spraying pipe is uniformly arranged on a circumference taking the same vertical axis as the circle center, and the spraying head of the secondary circumferential spraying pipe is also arranged below the front end of the secondary circumferential spraying pipe;
the structure of the third-stage spraying device is the same as that of the second-stage spraying device, and a third-stage central spraying pipe and a third-stage circumferential spraying pipe are arranged, and the third-stage circumferential spraying pipe of the third-stage spraying device and the circumferential spraying pipe of the second-stage spraying device are arranged in a staggered mode;
the cooling liquid adopted by the utility model is sodium hydroxide aqueous solution with the mass concentration of about 5 percent or other alkaline aqueous solution with approximate concentration; the adopted spray heads are all atomization spray heads which can spray downwards, and all spray heads which can be directly purchased in the market, such as spiral nozzles or spiral spray heads and other existing products, are adopted;
by adopting the flue gas quenching dust removal device with the structure, the flue gas enters a spray header of a first-stage spray device behind the device and sprays alkaline aqueous solution with the mass concentration of about 5 percent downwards, the spray amount of the flue gas is generally controlled to be 2-3 cubic meters per hour, at the moment, the flue gas carries the largest heat quantity, the flue gas can be gasified quickly after being contacted with the sprayed alkaline aqueous solution, the contact area of the gasified cooling liquid and the flue gas is increased rapidly, so that the flue gas is better mixed with the flue gas to absorb the heat quantity in the flue gas and the heat quantity is changed into superheated steam, the generation of substances such as dioxin and the like is avoided due to the rapid reduction of the temperature, meanwhile, the alkaline substances in the cooling liquid can react with acidic waste or other reactable substances in the flue gas to form salt, so as to achieve the purpose of purifying the flue gas, in the prior art, but the salt formed appears as solid products after being heated, therefore, solid waste residues are generated, and the waste residues are easy to scale in the cooling device, further block and corrode metal parts in the cooling device, which is a problem difficult to solve by the prior art and one of the technical problems to be solved by the utility model, therefore, the inventor adds a second-level spray device and a third-level spray device in the technical scheme, so that flue gas is rapidly cooled by the alkali-containing cooling liquid of the first-level spray device to form a flue gas and water vapor mixture containing solid products, the solid products are dissolved in the cooling liquid again after cooling by the second-level spray device and the third-level spray device, and simultaneously, the water vapor is also cooled to be liquid, and the two parts of substances are mixed with the cooling liquid sprayed by the second-level spray device and the third-level spray device to form new cooling liquid; in order to achieve the purpose of cooling the flue gas to 60-80 ℃, the spraying amount of the secondary spraying device and the tertiary spraying device is generally controlled to reach 20-30 times of that of the primary spraying device, and generally controlled to reach about 70 cubic meters per hour, and the overall cooling effect under the spraying amount is far higher than that of the existing dry cooling device, so that the generation of harmful substances such as dioxin and the like is further avoided; a liquid recovery cavity is arranged at the lower part of the cooler tower body, so that the cooling liquid can be recovered and stored, and a flue gas outlet is arranged on the side wall of the tower body above the liquid recovery cavity, so that the flue gas can be conveniently and quickly discharged;
furthermore, the liquid recovery cavity is connected with a circulating device outside the tower body, the circulating device is respectively connected with liquid inlet pipelines of the first-stage spraying device, the second-stage spraying device and the third-stage spraying device through pipelines, and the liquid inlet pipelines are provided with control valves for controlling the spraying amount of different spraying devices; furthermore, in the flue gas cooling process, the cooling liquid absorbs the heat in the flue gas, and the part of the heat is difficult to recycle in the prior art; the circulating device is a circulating pump, and the heat exchanger is a tube type heat exchanger.
In order to ensure the quenching effect of the scheme, the inventor also secondarily limits the vertical distribution of the first-stage spraying device, the second-stage spraying device and the third-stage spraying device in the tower body, and marks the vertical distance between the first-stage spraying device and the second-stage spraying device as h1And the vertical distance between the second-stage spraying device and the third-stage spraying device is recorded as h2And the vertical distance between the three-stage spraying device and the center of the flue gas outlet is recorded as h3H is to be1：h2：h3The ratio of (A) to (B) is controlled to be 3-5: 1: 1, preferably 4: 1: the design is that enough space is arranged below the first-stage spraying device, so that cooling liquid of the first-stage spraying device can be rapidly expanded after being contacted and heated with flue gas and is better contacted with the flue gas, the heat exchange area and effect are improved, and the cooling liquid of the second-stage spraying device and the cooling liquid of the third-stage spraying device can be better contacted and reacted with mixed flue gas generated after expansion, and soluble impurities and the like in the mixed flue gas can be better removed;
the secondary spraying device comprises a secondary central spraying pipe and a secondary circumferential spraying pipe, a central spraying head below the front end of the secondary central spraying pipe and a primary spraying head are arranged on the same vertical axis, the circumferential spraying pipes are uniformly arranged on a circumference taking the same vertical axis as the circle center, and the spraying heads of the circumferential spraying pipes are also arranged below the front end of the circumferential spraying pipe; the structure of the third-stage spraying device is the same as that of the second-stage spraying device, but the preferred circumferential spraying pipes of the third-stage spraying device and the preferred circumferential spraying pipes of the second-stage spraying device are arranged in a staggered manner; after the design is adopted, the atomized cooling area generated by downward spraying of the central spray pipe can be overlapped with the atomized cooling area generated by downward spraying of the circumferential spray pipe, so that a cooling area which completely covers the inner diameter range of the cooler tower body is formed, and the circumferential spray pipes of the third-stage spray device and the circumferential spray pipes of the second-stage spray device are arranged in a staggered manner, so that the cooling area formed by the third-stage spray device can be complementary with the cooling area formed by the second-stage spray device, and a better cooling and purifying effect is achieved, which is also not achieved by the prior art;
the utility model provides an above-mentioned device has fine effect to the flue gas that the schizolysis of abandonment macromolecular material produced, and this kind of device also is applicable to the processing of other sources flue gas equally, all has better effect.
In conclusion, by adopting the flue gas quenching and dedusting device with the structure, the flue gas is rapidly cooled by the alkali-containing cooling liquid after entering the device, and the temperature of the flue gas is finally reduced to 60-80 ℃ through the cooling of the secondary and tertiary spray devices, the cooling effect is far higher than that of the existing dry cooling device, the generation of harmful substances such as dioxin can be effectively avoided, the adopted cooling liquid can be recycled, and the win-win of environmental protection and economic benefit is achieved.
Drawings
FIG. 1 is a schematic structural view of a flue gas quenching and dust removing device of the present invention;
fig. 2 is a schematic top cross-sectional view of the chiller tower at a primary spray assembly location in accordance with the present invention;
fig. 3 is a schematic top cross-sectional view of a chiller tower according to the present invention in a tertiary spray position;
in the figure, 1 is a cooler tower body, 2 is a primary spray header, 3 is a flue gas inlet, 4 is a primary spray pipe, 5 is a pipeline, 6 is a heat exchanger, 7 is a circulating device, 8 is a flue gas outlet, 9 is a three-stage circumferential spray pipe, 10 is a two-stage circumferential spray pipe, 11 is a two-stage central spray pipe, 12 is a three-stage central spray pipe, and 13 is a liquid recovery cavity;
i is a primary spraying device, II is a secondary spraying device, and III is a tertiary spraying device;
the dotted lines in fig. 2 and 3 are the extent of the atomized cooling zone created by the shower spraying down liquid.
Detailed Description
A flue gas quenching dust removal device comprises a cooler tower body 1, wherein a flue gas inlet 3 is formed in the top of the cooler tower body 1, a first-stage spraying device I is arranged below the flue gas inlet 3, a liquid recovery cavity 13 is formed in the lower portion of the cooler tower body 1, a flue gas outlet 8 is formed in the side wall of the tower body above the liquid recovery cavity 13, a third-stage spraying device III is arranged in the tower body above the flue gas outlet 8, and a second-stage spraying device II is arranged in the tower body between the first-stage spraying device I and the third-stage spraying device III;
the primary spraying device I comprises a primary spraying pipe 4 and a primary spraying head 2 arranged below the front end of the spraying pipe, and the primary spraying head 2 is arranged right below the flue gas inlet 3;
the second-stage spraying device II comprises a second-stage central spraying pipe 11 and a second-stage circumferential spraying pipe 10, a central spraying head below the front end of the second-stage central spraying pipe 11 and the first-stage spraying head 2 are arranged on the same vertical axis, the second-stage circumferential spraying pipe 10 is uniformly arranged on the circumference with the same vertical axis as the circle center, and the spraying head of the second-stage circumferential spraying pipe is also arranged below the front end of the second-stage circumferential spraying pipe 10;
the structure of the third stage spraying device III is the same as that of the second stage spraying device II, a third stage central spraying pipe 12 and a third stage circumferential spraying pipe 9 are arranged, and the third stage circumferential spraying pipe 9 of the third stage spraying device and the second stage circumferential spraying pipe 10 of the second stage spraying device are arranged in a staggered mode;
the vertical distance between the first-stage spraying device I and the second-stage spraying device II is recorded as h1And the vertical distance between the second-stage spraying device II and the third-stage spraying device III is recorded as h2And the vertical distance between the third-stage spraying device III and the center of the flue gas outlet 8 is recorded as h3H is to be1：h2：h3The ratio of (a) to (b) is set to 4: 1: 1;
the liquid recovery cavity 13 is connected with a circulating device 7 outside the tower body, the circulating device 7 is respectively connected with liquid inlet pipelines of a first-stage spraying device I, a second-stage spraying device II and a third-stage spraying device III through pipelines 5, control valves are arranged on the liquid inlet pipelines, and a heat exchanger 6 is arranged between the pipelines 5 and the circulating device 7;
the circulating device is a circulating pump, the heat exchanger is a tube type heat exchanger, and the adopted spray head is a spiral nozzle.
Claims (6)
1. The utility model provides a flue gas rapid cooling dust collector, the device includes cooler tower body (1), and cooler tower body (1) top is provided with flue gas inlet (3), its characterized in that: a first-stage spraying device (I) is arranged below the flue gas inlet (3), a liquid recovery cavity (13) is arranged at the lower part of the cooler tower body (1), a flue gas outlet (8) is arranged on the side wall of the tower body above the liquid recovery cavity (13), a third-stage spraying device (III) is arranged in the tower body above the flue gas outlet (8), and a second-stage spraying device (II) is arranged in the tower body between the first-stage spraying device (I) and the third-stage spraying device (III);
the primary spraying device (I) comprises a primary spraying pipe (4) and a primary spraying head (2) arranged below the front end of the spraying pipe, and the primary spraying head (2) is arranged right below the flue gas inlet (3);
the secondary spraying device (II) comprises a secondary central spraying pipe (11) and a secondary circumferential spraying pipe (10), a central spraying head below the front end of the secondary central spraying pipe (11) and the primary spraying head (2) are arranged on the same vertical axis, the secondary circumferential spraying pipe (10) is uniformly arranged on the circumference taking the same vertical axis as the circle center, and the spraying head of the secondary circumferential spraying pipe is also arranged below the front end of the secondary circumferential spraying pipe (10);
the structure of the third-stage spraying device (III) is the same as that of the second-stage spraying device (II), and a third-stage central spraying pipe (12) and a third-stage circumferential spraying pipe (9) are arranged;
the liquid recycling cavity (13) is connected with a circulating device (7) outside the tower body, the circulating device (7) is respectively connected with liquid inlet pipelines of a first-stage spraying device (I), a second-stage spraying device (II) and a third-stage spraying device (III) through pipelines (5), and control valves are arranged on the liquid inlet pipelines.
2. According to the claimsAsk 1 flue gas rapid cooling dust collector, its characterized in that: the vertical distance between the first-stage spraying device (I) and the second-stage spraying device (II) is recorded as h1And the vertical distance between the second-stage spraying device (II) and the third-stage spraying device (III) is recorded as h2And the vertical distance between the third-stage spraying device (III) and the center of the flue gas outlet (8) is recorded as h3H is to be1：h2：h3The ratio of (A) to (B) is 3-5: 1: 1.
3. the flue gas quenching and dedusting device as claimed in claim 1, wherein: and the three-stage circumferential spray pipes (9) of the three-stage spray device and the two-stage circumferential spray pipes (10) of the two-stage spray device are arranged in a staggered manner.
4. The flue gas quenching and dedusting device as claimed in claim 1, wherein: a heat exchanger (6) is arranged between the pipeline (5) and the circulating device (7).
5. The flue gas quenching and dedusting device as claimed in claim 1, wherein: the circulating device (7) is a circulating pump.
6. The flue gas quenching and dedusting device as claimed in claim 2, characterized in that: h is1：h2：h3In a ratio of 4: 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921001954.9U CN210332087U (en) | 2019-06-28 | 2019-06-28 | Flue gas rapid cooling dust collector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921001954.9U CN210332087U (en) | 2019-06-28 | 2019-06-28 | Flue gas rapid cooling dust collector |
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| CN210332087U true CN210332087U (en) | 2020-04-17 |
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| CN201921001954.9U Active CN210332087U (en) | 2019-06-28 | 2019-06-28 | Flue gas rapid cooling dust collector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074924A (en) * | 2020-08-20 | 2022-02-22 | 中石化南京化工研究院有限公司 | System and method for preparing sulfuric acid by regenerating sulfur-containing waste |
| CN113828136B (en) * | 2021-10-15 | 2024-04-12 | 上海电气集团股份有限公司 | Flue gas treatment system and method |
-
2019
- 2019-06-28 CN CN201921001954.9U patent/CN210332087U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074924A (en) * | 2020-08-20 | 2022-02-22 | 中石化南京化工研究院有限公司 | System and method for preparing sulfuric acid by regenerating sulfur-containing waste |
| CN113828136B (en) * | 2021-10-15 | 2024-04-12 | 上海电气集团股份有限公司 | Flue gas treatment system and method |
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