CN210752009U - Flue gas dry deacidification device and flue gas purification system - Google Patents
Flue gas dry deacidification device and flue gas purification system Download PDFInfo
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- CN210752009U CN210752009U CN201920582576.1U CN201920582576U CN210752009U CN 210752009 U CN210752009 U CN 210752009U CN 201920582576 U CN201920582576 U CN 201920582576U CN 210752009 U CN210752009 U CN 210752009U
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Abstract
The utility model provides a flue gas dry deacidification device and a flue gas purification system, wherein the device comprises an ash bucket 1; the ash bucket air inlet 2 is used for sending the flue gas into the ash bucket 1; the guide plate 3 is positioned in the ash bucket 1 and sends the flue gas into a cloth bag 5 of a flue gas dry deacidification device; and the lower ash port 4 is arranged below the ash bucket 1. The device also comprises a lime powder spray gun adapter 6 and one or more rotatable lime powder spray guns 8, wherein the one or more lime powder spray guns 8 are horizontally arranged above the flow guide plate 3, and the lime powder spray gun adapter 6 is used for enabling air carrying lime powder to enter the one or more lime powder spray guns 8. The flue gas dry deacidification device and the flue gas purification system remarkably improve the dry deacidification efficiency and the utilization rate of lime powder, and realize full-automatic control.
Description
Technical Field
The utility model relates to a domestic waste burns gas cleaning field to specifically, relate to a flue gas dry process deacidification device and gas cleaning system.
Background
At present, the waste incineration power generation industry in China is developed vigorously, and a plurality of waste incineration power plants are built in various places. Due to the complex composition of the garbage, pollutants in the flue gas generated by combustion are various, and the acidic gas is the pollutant which is concerned more. At present, the conventional flue gas purification process comprises 'SNCR + semi-dry method + activated carbon + cloth bag', and can meet the emission standard of European Union 2010, but because the dry method has low efficiency and high lime consumption, the dry method is often in an off-stream state, and the flue gas deacidification is completely carried out by a semi-dry deacidification tower. Therefore, the semidry deacidification overload operation is easily caused, and a series of problems of atomizer blockage, reaction tower wall-mounted dust accumulation, excessively low reaction tower outlet temperature and the like are further caused.
The dry deacidification efficiency is low, the direct reason is that the design mode of the existing dry deacidification is unreasonable, but the essential reason is that the quality of the lime powder is poor. Lime ore in China contains more impurities and low effective content of calcium carbonate, and the later lime powder production process is not fine, so that the particle sizes in the lime powder are different.
There are many schemes for improving the efficiency of dry deacidification, one of which is listed. CN201320155933 provides a thought, and designs a dry deacidification reactor, wherein a fan injection powder adding device is arranged in an inlet flue, a turbulent mixing device is arranged below the inlet flue, and the turbulent mixing device comprises a fan, an arc-shaped air delivery pipeline and a plurality of tangential air injection pipes. After the lime powder is sent into the reactor by the injection fan, the mixing degree of the lime powder and the flue gas is increased under the disturbance action of tangential air injection, and the dry deacidification efficiency can be improved to a certain extent.
The prior art is mainly characterized in that a dry deacidification reactor is arranged to enhance the disturbance of flue gas and lime powder, thereby improving the dry deacidification efficiency. However, for the process of purifying the flue gas generated by burning the household garbage, a special dry deacidification reactor is not provided, a dry jet orifice is usually arranged on a horizontal flue between a reaction tower and a bag-type dust remover, lime powder is brought to a bag in the bag-type dust remover by the flue gas in the flue, and the acid gas and the lime powder undergo deacidification reaction when the flue gas passes through the bag. Therefore, the bag-type dust collector is used as a second deacidification reactor and is very important for dry deacidification.
After the lime powder is sprayed into the horizontal flue at the jet orifice of the horizontal flue, large particles are more easily deposited into the horizontal flue under the action of gravity because of different sizes of lime powder particles in China; after the flue gas enters the ash bucket of the bag-type dust collector, under the action of the guide plate, the large-particle lime powder can easily and directly fall into the ash bucket instead of continuously rising to the bag position of the bag-type dust collector. Thus, more lime powder is wasted without being effectively contacted with the acid gas at all. The technology at the present stage hardly considers the problem of low efficiency of the dry method caused by the waste of large-particle lime powder. In conclusion, the dry deacidification device and the dry deacidification system in the existing flue gas process have the problems of low efficiency, high lime consumption and high material consumption cost.
Therefore, it is now urgently needed to provide a flue gas dry deacidification device and a flue gas purification system, which can significantly improve the efficiency of dry deacidification, reduce lime consumption and reduce the material consumption cost of the flue gas purification system.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above problems, according to one aspect of the present invention, a flue gas dry deacidification apparatus is provided, comprising an ash bucket 1; the ash bucket air inlet 2 is used for sending the flue gas into the ash bucket 1; the guide plate 3 is positioned in the ash bucket 1 and sends the flue gas into a cloth bag 5 of a flue gas dry deacidification device; and the lower ash port 4 is arranged below the ash bucket 1. The device also comprises a lime powder spray gun adapter 6 and one or more rotatable lime powder spray guns 8, wherein the one or more lime powder spray guns 8 are horizontally arranged above the flow guide plate 3, and the lime powder spray gun adapter 6 is used for enabling air carrying lime powder to enter the one or more lime powder spray guns 8.
In one embodiment, the one or more lime powder injection lances 8 are provided with injection ports located at left, right and upper sides of the one or more lime powder injection lances 8, and the lower side of the one or more lime powder injection lances 8 is not provided with the injection ports, and the injection ports inject lime powder upward, leftward and rightward when the apparatus is operated.
In one embodiment, the apparatus further comprises a rotary actuator 7 arranged outside the one or more lime powder injection guns 8 for adjusting the rotation of the one or more lime powder injection guns 8 along the axis.
In one embodiment, the one or more lime powder injection lances 8 are axially rotated 180 degrees such that the plurality of injection ports that are upward become downward when the apparatus is cleaning ash.
In one embodiment, the rotary actuator 7 is electrically driven by means of a built-in electrically operated valve.
In one embodiment, the rotary actuator 7 is pneumatically driven by means of an internally pneumatically actuated valve.
In one embodiment, the electric valve can control the spraying of the lime powder so as to ensure that the spraying execution signal and the ash removal signal of the lime powder are linked to realize automatic operation.
In one embodiment, the pneumatic valve can control the spraying of the lime powder so as to ensure that a lime powder spraying execution signal is linked with an ash removal signal, and automatic operation is realized.
In one embodiment, the device ash removal is controlled using pressure differential or time.
In one embodiment, when the device reaches the designed ash removal pressure difference or time point, sending an ash removal signal to enable one bin of the device to start ash removal operation, and stopping spraying lime powder when the spraying execution signal is interrupted; and when the ash removal of the bin is finished, the injection execution signal of the bin is started, and the lime powder is continuously injected.
In one embodiment, the one or more lime powder injection lances 8 are arranged perpendicular to the deflector plate 3.
In one embodiment, the one or more lime powder lances 8 are of a high temperature ceramic material that is wear resistant and corrosion resistant.
According to another aspect of the utility model, a flue gas purification system is proposed, the system includes foretell flue gas dry process deacidification device.
In one embodiment, the injection execution signal is issued by a distributed control system.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 shows a main view of a flue gas dry deacidification apparatus according to an embodiment of the present invention;
fig. 2 shows a top view of a flue gas dry deacidification apparatus according to an embodiment of the present invention, wherein the spray gun is perpendicular to the guide plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the present invention and are not intended to limit the invention to the particular embodiments described herein. Based on the embodiments of the present invention described in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
First, a flue gas dry deacidification apparatus according to an embodiment of the present invention is described with reference to fig. 1.
As shown in fig. 1, a flue gas dry deacidification device comprises an ash hopper 1; the ash bucket air inlet 2 is used for sending the flue gas into the ash bucket 1; the guide plate 3 is positioned in the ash bucket 1 and sends the flue gas into a cloth bag 5 of a flue gas dry deacidification device; and the lower ash port 4 is arranged below the ash bucket 1. And the device further comprises a lime powder lance connection pipe 6 and one or more rotatable lime powder lances 8, the one or more lime powder lances 8 being arranged horizontally above the deflector plate 3, and the lime powder lance connection pipe 6 being used for letting air carrying lime powder into the one or more lime powder lances 8.
In the embodiment, flue gas enters the ash hopper 1 from the ash hopper air inlet 2 after being deacidified by the semidry method. A guide plate 3 is arranged in the ash bucket 1, and the flue gas can be uniformly distributed and then sent into a box body cloth bag 5 in a flue gas dry deacidification device.
In one embodiment, the one or more lime powder injection lances 8 are provided with a plurality of injection ports located at the left, right and upper sides of the one or more lime powder injection lances 8, and the lower side of the one or more lime powder injection lances 8 is not provided with the injection ports. Specifically, 10 injection ports can be arranged on the left side, the right side and the upper side of the spray gun, and the injection ports are not opened below the spray gun.
In one embodiment, the flue gas dry deacidification device further comprises a rotary actuator 7 arranged outside the one or more lime powder spray guns 8 for adjusting the rotation of the one or more lime powder spray guns 8 along the axis.
In one embodiment, the plurality of injection ports inject the lime powder upward, leftward and rightward when the flue gas dry deacidification apparatus is operated. In one embodiment, the one or more lime powder injection lances 8 are axially rotated 180 degrees such that the plurality of injection ports that are upward become downward when the apparatus is cleaning ash.
In one embodiment, the rotary actuator (7) is electrically driven by means of a built-in electric valve. In one embodiment, the electric valve can control the spraying of the lime powder so as to ensure that the spraying execution signal and the ash removal signal of the lime powder are linked to realize automatic operation. Specifically, the execution signal is connected to the flue gas DCS system and is linked with the ash removal signal of the flue gas dry deacidification device, so that automatic operation is realized. A Distributed Control System (DCS), also known as a distributed computer control system, is a novel control technology for carrying out centralized monitoring, operation, management and distributed control on a production process by utilizing a computer technology.
In one embodiment, when the device reaches the designed ash removal pressure difference or time point, sending an ash removal signal to enable one bin of the device to start ash removal operation, and stopping spraying lime powder when the spraying execution signal is interrupted; and when the ash removal of the bin is finished, the injection execution signal of the bin is started, and the lime powder is continuously injected.
In one embodiment, the rotary actuator 7 is pneumatically driven by means of an internally pneumatically actuated valve. In one embodiment, the pneumatic valve can control the spraying of the lime powder so as to ensure that a lime powder spraying execution signal is linked with an ash removal signal, and automatic operation is realized.
Next, another flue gas dry deacidification apparatus according to an embodiment of the present invention will be described with reference to fig. 2, in which the spray gun is perpendicular to the guide plate.
Fig. 2 is a top view of fig. 1 with the lance perpendicular to the deflector. Specifically, fig. 2 shows a planar arrangement of lime powder spray guns, the spray guns are arranged perpendicular to the flow guide plate, and a plurality of spray guns may be provided, and each spray gun is provided with a plurality of lime powder injection ports. In the embodiment shown in fig. 2, 3 lances are optionally arranged.
According to the utility model discloses a on the other hand provides a flue gas purification system, and it includes foretell any kind of flue gas dry process deacidification device. In one embodiment, the injection execution signal is issued by the DCS control system.
The utility model provides a flue gas dry process deacidification device and gas cleaning system have following characteristics: the dry deacidification spray gun is arranged in the flue gas dry deacidification device, namely above the ash bucket guide plate, and each spray gun is provided with a plurality of spray ports; the spray gun can rotate and is controlled by an external actuator, and the spray gun is made of wear-resistant and corrosion-resistant high-temperature ceramic; one or more spray guns can be arranged on each ash bucket, and the direction can be parallel to or vertical to the guide plate; and the rotation of the spray gun, the injection signal of the lime powder and the ash removal signal of the flue gas dry deacidification device are linked and synchronously carried out.
The utility model provides a following a plurality of defects among the prior art have been overcome to flue gas dry process deacidification device and gas cleaning system: the traditional dry method injection port is arranged in a horizontal flue in front of a flue gas dry method deacidification device, and the mode easily causes larger lime particles to be deposited in the horizontal flue or fall into an ash bucket under the blocking action of an ash bucket guide plate, so that the larger lime particles cannot be fully contacted with acid gas and are wasted. And large particles in the lime powder occupy a larger weight percentage of lime, so that the traditional dry deacidification method has low efficiency and high lime consumption.
The utility model provides a flue gas dry process deacidification device and gas cleaning system have following beneficial effect: the utility model arranges the lime jet orifice above the ash bucket guide plate of the flue gas dry deacidification device, and the lime powder is sprayed out to the periphery through the jet orifice but can not be sprayed downwards, so that the larger lime powder can be brought to the upper cloth bag area by the flue gas flow, can be fully contacted with the flue gas, and improves the utilization rate of the lime powder; the lime powder injection execution signal is linked with the ash removal signal of the flue gas dry deacidification device, so that fly ash cannot fall to an injection port to cause blockage when the flue gas dry deacidification device removes ash; and the device is controlled in a full-automatic mode without manual operation.
Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as claimed in the appended claims.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present invention should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The above description is only for the specific embodiments of the present invention or the description of the specific embodiments, the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. A dry deacidification device for flue gas comprises an ash bucket (1); the ash bucket air inlet (2) is used for sending the flue gas into the ash bucket (1); the guide plate (3) is positioned in the ash bucket (1) and sends the flue gas into a cloth bag (5) of a flue gas dry deacidification device; the lime powder spraying device comprises a lower ash opening (4) arranged below an ash bucket (1), and is characterized by further comprising a lime powder spraying gun connecting pipe (6) and one or more rotatable lime powder spraying guns (8), wherein the one or more lime powder spraying guns (8) are horizontally arranged above a flow guide plate (3), and the lime powder spraying gun connecting pipe (6) is used for enabling air carrying lime powder to enter the one or more lime powder spraying guns (8).
2. The flue gas dry deacidification apparatus according to claim 1, wherein a plurality of injection ports are provided on said one or more lime powder injection guns (8), said plurality of injection ports are located on the left, right and upper sides of said one or more lime powder injection guns (8), and said injection ports are not provided on the lower side of said one or more lime powder injection guns (8), and when said apparatus is operated, said plurality of injection ports inject lime powder upward, leftward and rightward.
3. The dry flue gas deacidification apparatus according to claim 1, further comprising a rotary actuator (7) disposed outside of said one or more lime powder injection guns (8) for adjusting the rotation of said one or more lime powder injection guns (8) along the axis.
4. The dry flue gas deacidification apparatus according to claim 3, wherein when the dry flue gas deacidification apparatus is deashing, the one or more lime powder spray guns (8) are axially rotated by 180 degrees so that the upward plurality of spray ports become downward.
5. The dry flue gas deacidification device according to claim 3, wherein said rotary actuator (7) is electrically driven by means of a built-in electric valve.
6. The dry flue gas deacidification device according to claim 3, wherein said rotary actuator (7) is driven pneumatically by means of an internal pneumatic valve.
7. The dry flue gas deacidification device according to claim 5, wherein the electric valve controls the injection of the lime powder to ensure the linkage of the injection execution signal and the ash removal signal of the lime powder, thereby realizing automatic operation.
8. The dry flue gas deacidification device according to claim 6, wherein the pneumatic valve controls the injection of the lime powder to ensure the linkage of the injection execution signal and the ash removal signal of the lime powder, thereby realizing automatic operation.
9. The dry flue gas deacidification device according to claim 7 or 8, wherein the ash removal of the dry flue gas deacidification device is controlled by pressure difference or time.
10. The dry flue gas deacidification device according to claim 9, wherein when the device reaches a designed ash removal pressure difference or time point, an ash removal signal is sent out to enable one bin of the dry flue gas deacidification device to start ash removal operation, the injection execution signal is interrupted, and the injection of lime powder is stopped; and when the ash removal of the bin is finished, the injection execution signal of the bin is started, and the lime powder is continuously injected.
11. The flue gas dry deacidification plant according to claim 1, characterized in that said one or more lime powder lances (8) are arranged perpendicular to said deflector plate (3).
12. The apparatus of claim 1, wherein the one or more lime powder lances (8) are of a high temperature ceramic material that is wear resistant and corrosion resistant.
13. A flue gas purification system, characterized by comprising a flue gas dry deacidification plant according to any one of claims 1 to 12.
14. The flue gas purification system according to claim 13, wherein the injection execution signal is issued by a distributed control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920582576.1U CN210752009U (en) | 2019-04-25 | 2019-04-25 | Flue gas dry deacidification device and flue gas purification system |
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| CN201920582576.1U CN210752009U (en) | 2019-04-25 | 2019-04-25 | Flue gas dry deacidification device and flue gas purification system |
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| CN210752009U true CN210752009U (en) | 2020-06-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112870904A (en) * | 2021-03-30 | 2021-06-01 | 东莞汇乐环保股份有限公司 | Powder spraying and dust removing integrated machine |
| CN114990963A (en) * | 2022-04-29 | 2022-09-02 | 中电建路桥集团有限公司 | Pulling type cloth ash device |
-
2019
- 2019-04-25 CN CN201920582576.1U patent/CN210752009U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112870904A (en) * | 2021-03-30 | 2021-06-01 | 东莞汇乐环保股份有限公司 | Powder spraying and dust removing integrated machine |
| CN114990963A (en) * | 2022-04-29 | 2022-09-02 | 中电建路桥集团有限公司 | Pulling type cloth ash device |
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