CN210448637U - Burn dioxin remove device of waste gas - Google Patents
Burn dioxin remove device of waste gas Download PDFInfo
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- CN210448637U CN210448637U CN201920925853.4U CN201920925853U CN210448637U CN 210448637 U CN210448637 U CN 210448637U CN 201920925853 U CN201920925853 U CN 201920925853U CN 210448637 U CN210448637 U CN 210448637U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The application discloses a dioxin eliminating device for burning waste gas, which comprises a heat recovery device, a primary tower bottom pump, a secondary tower bottom pump, a primary absorption tower and a secondary absorption tower, wherein a first liquid conveying pipe for introducing primary absorption liquid is connected to the top of the primary absorption tower in a communicating manner, a second liquid conveying pipe for introducing secondary absorption liquid is connected to the top of the secondary absorption tower in a communicating manner, and a gas outlet at the top of the primary absorption tower is connected with a gas inlet at the lower part of the secondary absorption tower through a pipeline; the incineration waste gas which is preliminarily cooled by the heat recovery device is introduced from the lower part of the primary absorption tower and reversely contacts with the primary absorption liquid in the primary absorption tower; the incineration waste gas discharged from the gas outlet at the top of the primary absorption tower is introduced from the lower part of the secondary absorption tower and reversely contacts with the secondary absorption liquid in the secondary absorption tower; and discharging incineration waste gas with qualified dioxin content from the top of the secondary absorption tower. The device of this application plans on the basis of the emission of elimination and control dioxin, retrieves the heat of burning, reduces the running cost of enterprise.
Description
Technical Field
The application relates to a dioxin eliminating device for burning waste gas.
Background
The combustion waste gas comprises high-concentration sewage incineration, residual liquid incineration, various garbage incineration, tail gas incineration waste gas and other high-temperature waste gas generated in similar incineration processes of fine chemical enterprises. In the high-temperature waste gas generated by various incineration equipment, in order to control the generation of dioxin in the traditional process, the high-temperature combustion waste gas is realized by adopting a water chilling mode, so that the heat cannot be recovered, and the operation cost is higher.
Disclosure of Invention
To the above-mentioned problem that exists among the prior art, the utility model aims to provide a dioxin remove device who burns waste gas, can realize the elimination of the dioxin in burning waste gas and retrieve the heat in burning waste gas through the device of this application.
The device for eliminating the dioxin generated in waste gas incineration is characterized by comprising a heat recovery device, a primary tower bottom pump, a secondary tower bottom pump, a primary absorption tower and a secondary absorption tower, wherein the heat recovery device is used for primarily cooling the high-temperature incineration waste gas containing the dioxin; the primary tower bottom pump is used for conveying the tower bottom liquid of the primary absorption tower upwards and returning the tower bottom liquid to the primary absorption tower to form circulating spraying of the primary absorption liquid in the primary absorption tower; the secondary tower bottom pump is used for conveying the tower bottom liquid of the secondary absorption tower upwards and returning the tower bottom liquid to the secondary absorption tower to form circulating spraying of the secondary absorption liquid in the secondary absorption tower; the incineration waste gas which is preliminarily cooled by the heat recovery device is introduced from the lower part of the primary absorption tower and reversely contacts with the primary absorption liquid in the primary absorption tower; the incineration waste gas discharged from the gas outlet at the top of the primary absorption tower is introduced from the lower part of the secondary absorption tower and reversely contacts with the secondary absorption liquid in the secondary absorption tower; and discharging incineration waste gas with qualified dioxin content from the top of the secondary absorption tower.
The device for eliminating the dioxin generated in the incineration of the waste gas is characterized in that the heat recovery device comprises a waste heat boiler and an air blower, the waste heat boiler is provided with a desalted water inlet and a desalted water outlet, and the waste heat boiler is connected with a lower air inlet of the primary absorption tower through the air blower by a pipeline; the high-temperature incineration waste gas containing the dioxin exchanges heat with desalted water in the waste heat boiler, the desalted water is heated to form steam and is discharged through a desalted water outlet of the waste heat boiler, and the high-temperature incineration waste gas is preliminarily cooled and is input into the primary absorption tower through the blower.
The device for eliminating the dioxin generated in the incineration of the waste gas is characterized by further comprising a first circulating pump, wherein an upper side line inlet, a middle side line outlet, a lower side line inlet and a bottom liquid outlet are formed in the first-stage absorption tower from top to bottom, the middle side line outlet of the first-stage absorption tower is connected to the upper side line inlet of the first-stage absorption tower through the first circulating pump through a pipeline, and circulating spraying of the first-stage absorption liquid in the middle upper part of the first-stage absorption tower is formed; a liquid outlet at the bottom of the primary absorption tower is connected to a lateral line inlet at the lower part of the primary absorption tower through a primary tower bottom pump by a pipeline to form circulating spraying of primary absorption liquid in the lower part of the primary absorption tower.
The device for eliminating the dioxin generated in waste gas incineration is characterized in that a secondary absorption tower is provided with a lower side line inlet and a bottom liquid outlet from top to bottom, the bottom liquid outlet of the secondary absorption tower is connected with a liquid inlet of a secondary tower bottom pump through a pipeline, the liquid outlet of the secondary tower bottom pump is divided into two paths, one path of the liquid outlet is connected with the lower side line inlet of the secondary absorption tower through a pipeline, and circulating spraying of secondary absorption liquid in the lower part of the secondary absorption tower is formed; the other path is connected with a first infusion tube through a first liquid outlet tube.
A burn dioxin remove device of waste gas, its characterized in that be provided with first drain pipe on the first drain pipe, the one end that first drain pipe was kept away from in the first drain pipe is connected to the pipeline between the liquid outlet of first circulating pump and the upper portion side inlet of one-level absorption tower.
The device for eliminating the dioxin generated in the incineration of the waste gas is characterized by further comprising a second circulating pump, wherein an upper side line inlet and a middle side line outlet are formed in the secondary absorption tower from top to bottom, the middle side line outlet of the secondary absorption tower is located above the lower side line inlet of the secondary absorption tower, and the middle side line outlet of the secondary absorption tower is connected to the upper side line inlet of the secondary absorption tower through the second circulating pump through a pipeline, so that the circulating spraying of the secondary absorption liquid in the middle upper part of the secondary absorption tower is formed.
The device for eliminating the dioxin generated in waste gas incineration is characterized in that a second branch liquid pipe is further connected to a pipeline between a liquid outlet of a primary tower bottom pump and a lower side line inlet of a primary absorption tower, so that a primary absorption liquid part at the bottom of the primary absorption tower is discharged for post-treatment.
A dioxin remove device that burns waste gas, its characterized in that second grade absorption tower top gas outlet divide into two the tunnel, will burn waste gas discharge to reach standard all the way, another way is through pipe connection to the pipeline between exhaust-heat boiler and the air-blower on to the part that follow second grade absorption tower top exhaust burns waste gas further absorption and handles.
The device for eliminating dioxin generated in waste gas incineration is characterized in that first-level absorption liquid is industrial wastewater, the industrial wastewater is wastewater containing acetic acid, DMF, DMAC, DMSO or butanol, and the second-level absorption liquid is water.
The beneficial effect that this application was got is:
this application plans on the basis of eliminating and controlling the emission of dioxin, retrieves the heat of burning, reduces the running cost of enterprise. The device of this application simple structure, waste gas not only can realize dioxin "zero" emission after advancing multistage absorption moreover, and the absorption process can also effectively reduce other VOCs's in the waste gas emission, is favorable to environmental protection.
Drawings
Fig. 1 is a schematic structural view of an apparatus for eliminating dioxin in incineration exhaust gas according to the present application;
in the figure: 1-a waste heat boiler, 2-a blower, 3-a first-stage absorption tower, 4-a second-stage absorption tower, 5-a first-stage tower bottom pump, 6-a second-stage tower bottom pump, 7-a first circulating pump, 8-a second circulating pump, 9-a first liquid conveying pipe, 10-a second liquid conveying pipe, 11-a first liquid branch pipe, 12-a first liquid outlet pipe and 13-a second liquid branch pipe.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
Example (b): compare FIG. 1
The utility model provides a burn dioxin remove device of waste gas, burns the preliminary refrigerated heat recovery device of waste gas including the high temperature that will contain the dioxin, one-level tower bottom pump 5, second grade tower bottom pump 6, first circulating pump 7, second circulating pump 8 and inside one-level absorption tower 3 and the second grade absorption tower 4 that all is equipped with the filler, 3 top commutations of one-level absorption tower have the first transfer line 9 that is used for letting in one-level absorption liquid, 4 top commutations of second grade absorption tower have the second transfer line 10 that is used for letting in second grade absorption liquid, and 3 top gas outlets of one-level absorption tower pass through the pipeline and are connected with 4 lower part air inlets of second grade absorption tower.
Referring to fig. 1, the heat recovery device comprises a waste heat boiler 1 and an air blower 2, wherein the waste heat boiler 1 is provided with a desalted water inlet and a desalted water outlet, and the waste heat boiler 1 is connected with a lower air inlet of a primary absorption tower 3 through the air blower 2 by a pipeline; the high-temperature incineration waste gas containing dioxin exchanges heat with desalted water in the waste heat boiler 1, the desalted water is heated to form steam and is discharged through a desalted water outlet of the waste heat boiler 1, and the high-temperature incineration waste gas is preliminarily cooled and is input into the primary absorption tower 3 through the blower 2. In this embodiment, the temperature of the incineration exhaust gas after heat recovery generally exceeds 100 ℃, so the desalted water can form high-temperature steam after heat exchange to recover the heat in the incineration exhaust gas.
An upper lateral line inlet, a middle lateral line outlet, a lower lateral line inlet and a bottom liquid outlet are arranged on the primary absorption tower 3 from top to bottom. A middle lateral line outlet of the first-stage absorption tower 3 is connected to an upper lateral line inlet of the first-stage absorption tower 3 through a first circulating pump 7 by a pipeline to form circulating spraying of first-stage absorption liquid in the middle upper part of the first-stage absorption tower 3; a liquid outlet at the bottom of the primary absorption tower 3 is connected to a lateral line inlet at the lower part of the primary absorption tower 3 through a primary tower bottom pump 5 by a pipeline to form circulating spraying of the primary absorption liquid in the lower part of the primary absorption tower 3. As can be seen from fig. 1, a second branch liquid pipe 13 is connected to a pipeline between the liquid outlet of the first-stage tower bottom pump 5 and the lower side inlet of the first-stage absorption tower 3, so as to partially discharge the first-stage absorption liquid at the bottom of the first-stage absorption tower 3 for post-treatment, and when the first-stage absorption liquid discharged from the second branch liquid pipe 13 is post-treated, the following processes can be adopted: after dioxin in the primary absorption liquid reaches a certain degree, the dioxin is discharged from the second branch liquid pipe 13 and is subjected to concentration treatment, and concentrated fractions can be directly sent to incineration equipment for treatment without additional treatment.
As can be seen from the comparison of fig. 1, the first liquid transport tube 9 is used to introduce the first-stage absorption liquid into the first-stage absorption tower 3, and the cyclic spraying process of the first-stage absorption liquid exists in the middle upper part of the first-stage absorption tower 3 and the lower part of the first-stage absorption tower 3, aiming at: make one-level absorption liquid can cyclic utilization, burn organic matters such as dioxin in the gas in addition and gather in the one-level absorption liquid of one-level absorption tower 3 lower part easily for organic matters such as dioxin in the one-level absorption liquid that the circulation in one-level absorption tower 3 lower part sprayed is higher in concentration, is favorable to carrying out the aftertreatment process from the one-level absorption liquid of second branch liquid pipe 13 exhaust. Secondly, the primary absorption liquid is sprayed in a plurality of stages in a circulating manner in the primary absorption tower 3, which is beneficial to improving the absorption effect of organic matters such as dioxin in the incineration gas.
Referring to fig. 1, an upper lateral line inlet, a middle lateral line outlet, a lower lateral line inlet and a bottom liquid outlet are arranged on the secondary absorption tower 4 from top to bottom, the bottom liquid outlet of the secondary absorption tower 4 is connected with a liquid inlet of the secondary tower bottom pump 6 through a pipeline, the liquid outlet of the secondary tower bottom pump 6 is divided into two paths, one path is connected with the lower lateral line inlet of the secondary absorption tower 4 through a pipeline, and circulating spraying of the secondary absorption liquid in the lower part of the secondary absorption tower 4 is formed; the other path is connected with a first liquid conveying pipe 9 through a first liquid outlet pipe 12. First drain pipe 12 is last to be provided with first drain pipe 11, first drain pipe 12 is kept away from to first drain pipe 11 one end is connected to on the pipeline between the liquid outlet of first circulating pump 7 and the upper portion siding import of one-level absorption tower 3. Since most of the organic matters such as dioxin in the incineration fuel gas are absorbed in the primary absorption tower 3, the concentration of the organic matters such as dioxin enriched in the secondary absorption liquid at the bottom of the secondary absorption tower 4 is low, and the organic matters such as dioxin can be partially conveyed into the primary absorption tower 3 for utilization.
The middle side line outlet of the secondary absorption tower 4 is connected to the upper side line inlet of the secondary absorption tower 4 through a second circulating pump 8 by a pipeline, so that circulating spraying of secondary absorption liquid in the middle upper part of the secondary absorption tower 4 is formed, the effect of absorbing organic matters such as dioxin from incineration gas is improved, and incineration waste gas with qualified dioxin content is basically discharged from the top of the secondary absorption tower 4. However, in order to further improve the emission standard of incineration exhaust gas, the following method can be adopted: the gas outlet at the top of the secondary absorption tower 4 is divided into two paths, one path of the gas is discharged after the incineration waste gas reaches the standard, and the other path of the gas is connected to a pipeline between the waste heat boiler 1 and the air blower 2 through a pipeline so as to further absorb and treat the part of the incineration waste gas discharged from the top of the secondary absorption tower 4.
From the above, the primary tower bottom pump 5 is used for conveying the tower bottom liquid of the primary absorption tower 3 upwards and returning the tower bottom liquid back to the primary absorption tower 3, so as to form a circulating spray of the primary absorption liquid in the lower part of the primary absorption tower 3. The secondary tower bottom pump 6 is used for conveying the tower bottom liquid of the secondary absorption tower 4 upwards and returning the tower bottom liquid into the secondary absorption tower 4 again to form circulating spraying of the secondary absorption liquid in the lower part of the secondary absorption tower 4.
Incineration waste gas after the primary cooling of the heat recovery device is introduced into the primary absorption tower 3 from the lower part of the primary absorption tower 3, the incineration waste gas after the primary cooling is in reverse contact with the primary absorption liquid in the primary absorption tower 3, and the primary absorption liquid further cools the incineration waste gas and absorbs most of organic matters such as dioxin in the incineration waste gas.
The incineration waste gas discharged from the gas outlet at the top of the first-stage absorption tower 3 is introduced into the second-stage absorption tower 4 from the lower part of the second-stage absorption tower 4, the incineration gas reversely contacts with the second-stage absorption liquid in the second-stage absorption tower 4, the incineration gas is cooled to a lower temperature level again by the second-stage absorption liquid, residual organic matters such as dioxin in the incineration waste gas are completely absorbed basically, and the incineration waste gas with qualified dioxin content is discharged from the top of the second-stage absorption tower 4 basically.
In the dioxin eliminating device for burning waste gas, a control valve is arranged on a corresponding pipeline.
In this application, for reduction in production cost, industrial waste water can be adopted to the one-level absorbing liquid, industrial waste water can be for containing acetic acid, DMF, DMAC, DMSO or butanol's waste water, the second grade absorbing liquid is water.
The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.
Claims (9)
1. A dioxin eliminating device for incinerating waste gas is characterized by comprising a heat recovery device, a primary tower bottom pump (5), a secondary tower bottom pump (6) and a primary absorption tower (3) and a secondary absorption tower (4) which are all internally provided with fillers, wherein the heat recovery device is used for preliminarily cooling high-temperature incinerating waste gas containing dioxin, the top of the primary absorption tower (3) is communicated with a first liquid conveying pipe (9) for introducing primary absorption liquid, the top of the secondary absorption tower (4) is communicated with a second liquid conveying pipe (10) for introducing secondary absorption liquid, and a top gas outlet of the primary absorption tower (3) is connected with a lower gas inlet of the secondary absorption tower (4) through a pipeline;
the primary tower bottom pump (5) is used for conveying the tower bottom liquid of the primary absorption tower (3) upwards and returning the tower bottom liquid into the primary absorption tower (3) to form the circulating spraying of the primary absorption liquid in the primary absorption tower (3); the secondary tower bottom pump (6) is used for conveying the tower bottom liquid of the secondary absorption tower (4) upwards and returning the tower bottom liquid into the secondary absorption tower (4) again to form circulating spraying of the secondary absorption liquid in the secondary absorption tower (4);
the incineration waste gas which is preliminarily cooled by the heat recovery device is introduced from the lower part of the primary absorption tower (3) and reversely contacts with the primary absorption liquid in the primary absorption tower (3); the incineration waste gas discharged from the gas outlet at the top of the primary absorption tower (3) is introduced from the lower part of the secondary absorption tower (4) and reversely contacts with the secondary absorption liquid in the secondary absorption tower (4); and the incineration waste gas with qualified dioxin content is discharged from the tower top of the secondary absorption tower (4).
2. The dioxin elimination apparatus for incineration exhaust gas according to claim 1, characterized in that the heat recovery apparatus includes a waste heat boiler (1) and a blower (2), the waste heat boiler (1) is provided with a desalted water inlet and a desalted water outlet, the waste heat boiler (1) is connected to the lower air inlet of the primary absorption tower (3) through the blower (2) by a pipeline; the high-temperature incineration waste gas containing the dioxin exchanges heat with desalted water in the waste heat boiler (1), the desalted water is heated to form steam and is discharged through a desalted water outlet of the waste heat boiler (1), and the high-temperature incineration waste gas is preliminarily cooled and is input into the primary absorption tower (3) through the blower (2).
3. The dioxin elimination apparatus for incineration exhaust gas according to claim 1, characterized by further comprising a first circulation pump (7), the primary absorption tower (3) is provided with an upper side inlet, a middle side outlet, a lower side inlet and a bottom outlet from top to bottom, the middle side outlet of the primary absorption tower (3) is connected to the upper side inlet of the primary absorption tower (3) through the first circulation pump (7) by a pipeline, so as to form a circulating spray of the primary absorption liquid in the middle upper part of the primary absorption tower (3); a liquid outlet at the bottom of the primary absorption tower (3) is connected to a lateral line inlet at the lower part of the primary absorption tower (3) through a primary tower bottom pump (5) by a pipeline to form circulating spraying of the primary absorption liquid in the lower part of the primary absorption tower (3).
4. The dioxin elimination apparatus for incineration exhaust gas according to claim 3, characterized in that the secondary absorption tower (4) is provided with a lower side inlet and a bottom outlet from top to bottom, the bottom outlet of the secondary absorption tower (4) is connected with the inlet of the secondary tower bottom pump (6) through a pipeline, the outlet of the secondary tower bottom pump (6) is divided into two paths, one path is connected with the lower side inlet of the secondary absorption tower (4) through a pipeline, and the circulating spray of the secondary absorption liquid in the lower part of the secondary absorption tower (4) is formed; the other path is connected with a first infusion tube (9) through a first liquid outlet tube (12).
5. The dioxin elimination device of incineration exhaust gas of claim 4, characterized in that a first branch pipe (11) is arranged on the first liquid outlet pipe (12), and one end of the first branch pipe (11) far away from the first liquid outlet pipe (12) is connected to a pipeline between a liquid outlet of the first circulation pump (7) and an upper side inlet of the primary absorption tower (3).
6. The dioxin elimination apparatus for incineration exhaust gas according to claim 4, further comprising a second circulation pump (8), wherein the second absorption tower (4) is provided with an upper side inlet and a middle side outlet from top to bottom, the middle side outlet of the second absorption tower (4) is located above the lower side inlet of the second absorption tower (4), and the middle side outlet of the second absorption tower (4) is connected to the upper side inlet of the second absorption tower (4) through the second circulation pump (8) by a pipeline, so as to form a circulating spray of the second absorption liquid in the middle upper part of the second absorption tower (4).
7. The apparatus for removing dioxin from incineration exhaust gas as in claim 3, wherein the second branch pipe (13) is connected to the pipe between the liquid outlet of the primary tower bottom pump (5) and the lower side inlet of the primary absorption tower (3) to discharge the primary absorption liquid at the bottom of the primary absorption tower (3) for post-treatment.
8. The dioxin eliminating device for incineration exhaust gas according to claim 2, characterized in that the air outlet at the top of the secondary absorption tower (4) is divided into two paths, one path is used for discharging the incineration exhaust gas after reaching standards, and the other path is connected to the pipeline between the exhaust-heat boiler (1) and the blower (2) through a pipeline, so as to further absorb and treat part of the incineration exhaust gas discharged from the top of the secondary absorption tower (4).
9. The apparatus for removing dioxin from incineration exhaust gas according to claim 1, characterized in that the primary absorption liquid is industrial wastewater, the industrial wastewater is wastewater containing acetic acid, DMF, DMAC, DMSO or butanol, and the secondary absorption liquid is water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920925853.4U CN210448637U (en) | 2019-06-19 | 2019-06-19 | Burn dioxin remove device of waste gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920925853.4U CN210448637U (en) | 2019-06-19 | 2019-06-19 | Burn dioxin remove device of waste gas |
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| CN210448637U true CN210448637U (en) | 2020-05-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370946A (en) * | 2020-11-17 | 2021-02-19 | 南通联恒新材料有限公司 | Multiple treatment system for absorbing dioxin in flue gas |
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2019
- 2019-06-19 CN CN201920925853.4U patent/CN210448637U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370946A (en) * | 2020-11-17 | 2021-02-19 | 南通联恒新材料有限公司 | Multiple treatment system for absorbing dioxin in flue gas |
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