CN109612288B - Flue gas treatment system and control method thereof - Google Patents
Flue gas treatment system and control method thereof Download PDFInfo
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- CN109612288B CN109612288B CN201910078763.0A CN201910078763A CN109612288B CN 109612288 B CN109612288 B CN 109612288B CN 201910078763 A CN201910078763 A CN 201910078763A CN 109612288 B CN109612288 B CN 109612288B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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Abstract
The invention discloses a flue gas treatment system and a control method thereof, wherein the flue gas treatment system comprises: the smoke inlet of the first sub-processing system is communicated with a smoke source through a first valve; the smoke inlet of the second sub-treatment system is communicated with the smoke source through a second valve; one end of the first circulating pipeline is communicated with the smoke inlet of the first sub-treatment system, the other end of the first circulating pipeline is communicated with the smoke outlet of the second sub-treatment system, and a third valve is arranged on the first circulating pipeline. According to the flue gas treatment system, the flue gas outlet of the second sub-treatment system is communicated with the flue gas inlet of the first sub-treatment system through the first circulation pipeline, so that high-temperature flue gas flows through the second sub-treatment system to preheat the second sub-treatment system, and then flows to the first sub-treatment system through the first circulation pipeline to perform purification and heat exchange treatment, and therefore the overall energy-saving and emission-reducing effects of the flue gas treatment system are improved.
Description
Technical Field
The invention relates to the field of flue gas treatment, in particular to a flue gas treatment system and a control method of the flue gas treatment system.
Background
With the increasing strengthening of environmental awareness, the construction of the flue gas treatment system in the glass manufacturing industry is improved. The traditional flue gas treatment system usually comprises a main system and a standby system, when the main system needs to be overhauled, the main system is switched to the standby system for flue gas treatment, and the main system is switched back after the main system is overhauled or the standby system is switched back to the main system for flue gas treatment when the standby system needs to be overhauled. However, before system switching, the standby system needs to be preheated, and the flue gas to be treated has the temperature capable of preheating the system, but the existing standby system cannot utilize the flue gas to be treated for system preheating, or the flue gas is preheated for the standby system, and the untreated flue gas is directly discharged to cause air pollution, so that the flue gas energy cannot be effectively utilized, the excessive discharge is effectively reduced, and the overall energy saving and emission reduction effects of the flue gas treatment system are reduced.
Disclosure of Invention
The invention mainly aims to provide a flue gas treatment system, and aims to solve the technical problem of improving the energy-saving and emission-reducing effects of the flue gas treatment system.
In order to achieve the above object, the present invention provides a flue gas treatment system, comprising:
the smoke inlet of the first sub-processing system is communicated with a smoke source through a first valve;
the smoke inlet of the second sub-treatment system is communicated with the smoke source through a second valve;
and one end of the first circulating pipeline is communicated with the smoke inlet of the first sub-treatment system, the other end of the first circulating pipeline is communicated with the smoke outlet of the second sub-treatment system, and a third valve is arranged on the first circulating pipeline.
Preferably, the flue gas treatment system further comprises a second smoke exhaust pipeline, the second smoke exhaust pipeline is communicated with the smoke outlet of the second sub-treatment system, and a fourth valve is arranged on the second smoke exhaust pipeline.
Preferably, the flue gas treatment system further comprises a temperature sensor and a controller electrically connected with the temperature sensor, the temperature sensor is used for detecting the preheating temperature of the second sub-treatment system, and the controller is used for controlling the opening and closing of the first valve, the second valve, the third valve and the fourth valve according to the preheating temperature.
Preferably, the flue gas treatment system further comprises a second circulation pipeline, one end of the second circulation pipeline is communicated with the flue gas inlet of the second sub-treatment system, the other end of the second circulation pipeline is communicated with the flue gas outlet of the first sub-treatment system, and a fifth valve is arranged on the second circulation pipeline.
Preferably, the flue gas treatment system further comprises a first smoke exhaust pipeline, the first smoke exhaust pipeline is communicated with the smoke outlet of the first sub-treatment system, and a sixth valve is arranged on the first smoke exhaust pipeline.
Preferably, the temperature sensor is configured to detect a preheating temperature of the first sub-processing system or the second sub-processing system, and the controller is configured to control opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve according to the preheating temperature.
The invention also provides a control method of the flue gas treatment system, wherein the flue gas treatment system comprises the following steps:
the smoke inlet of the first sub-processing system is communicated with a smoke source through a first valve;
the smoke inlet of the second sub-treatment system is communicated with the smoke source through a second valve;
one end of the first circulation pipeline is communicated with the smoke inlet of the first sub-treatment system, the other end of the first circulation pipeline is communicated with the smoke outlet of the second sub-treatment system, and a third valve is arranged on the first circulation pipeline;
the control method of the flue gas treatment system comprises the following steps:
s1: acquiring the preheating temperature of the second sub-processing system, comparing the preheating temperature of the second sub-processing system with the preset temperature, and executing the step S2 if the preheating temperature of the second sub-processing system is less than the preset temperature; if the preheating temperature of the second sub-processing system is greater than or equal to the preset temperature, executing step S3;
s2: controlling the first valve, the second valve and the third valve to be opened;
s3: and controlling the first valve and the third valve to close, and controlling the second valve to open.
Preferably, the flue gas treatment system further comprises a second smoke exhaust pipeline, the second smoke exhaust pipeline is communicated with the smoke outlet of the second sub-treatment system, and a fourth valve is arranged on the second smoke exhaust pipeline;
the content of step S2 further includes: controlling the fourth valve to close;
the content of step S3 further includes: and controlling the fourth valve to be opened.
Preferably, the flue gas treatment system further comprises a second circulation pipeline, one end of the second circulation pipeline is communicated with the flue gas inlet of the second sub-treatment system, the other end of the second circulation pipeline is communicated with the flue gas outlet of the first sub-treatment system, and a fifth valve is arranged on the second circulation pipeline;
the content of step S2 further includes: and controlling the fifth valve to be closed.
Preferably, the flue gas treatment system further comprises a first smoke exhaust pipeline, the first smoke exhaust pipeline is communicated with the smoke outlet of the first sub-treatment system, and a sixth valve is arranged on the first smoke exhaust pipeline;
the content of step S2 further includes: and controlling the sixth valve to be opened.
According to the flue gas treatment system, the flue gas outlet of the second sub-treatment system is communicated with the flue gas inlet of the first sub-treatment system through the first circulation pipeline, so that high-temperature flue gas flows through the second sub-treatment system to preheat the second sub-treatment system, and then flows to the first sub-treatment system through the first circulation pipeline to perform purification and heat exchange treatment, and therefore heat of the high-temperature flue gas can be effectively utilized to preheat the second sub-treatment system, and the preheated flue gas can be purified and heat exchanged to achieve standard emission of the flue gas, and therefore the overall energy-saving and emission-reducing effects of the flue gas treatment system are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of a system for flue gas treatment according to an embodiment of the present invention;
FIG. 2 is a system diagram of a first sub-processing system of the present invention;
FIG. 3 is a system diagram of a second sub-processing system of the present invention;
FIG. 4 is a block diagram of a flue gas treatment system according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a flue gas treatment system.
In an embodiment of the present invention, as shown in fig. 1 to 4, the flue gas treatment system includes:
a first sub-treatment system 10, the smoke inlet of which is communicated with a smoke source through a first valve 50;
a second sub-treatment system 20 having a smoke inlet in communication with a smoke source through a second valve 80;
and one end of the first circulating pipeline 21 is communicated with the smoke inlet of the first sub-treatment system 10, the other end of the first circulating pipeline is communicated with the smoke outlet of the second sub-treatment system 20, and a third valve 40 is arranged on the first circulating pipeline 21.
In this embodiment, the smoke source is a source for generating smoke, such as a glass melting furnace. The smoke inlets of the first sub-treatment system 10 and the second sub-treatment system 20 are communicated with the smoke source through pipelines. A first valve 50 is arranged between the smoke inlet of the first sub-processing system 10 and the smoke source, and a second valve 80 is arranged between the smoke inlet of the second sub-processing system 20 and the smoke source.
It should be noted that the first sub-processing system 10 and the second sub-processing system 20 have an idle state, a preheating condition and an operation condition. While the second sub-treatment system 2 is in the preheating condition, the first sub-treatment system 10 is in the operating condition. And opening the first valve 50, the second valve 80 and the third valve 40, directly introducing a part of gas of the smoke source into the first sub-treatment system 10 for purification treatment, and introducing the other part of gas into the second sub-treatment system 20 for preheating the second sub-treatment system 20. After preheating the second sub-treatment system 20, the flue gas continues to flow to the first sub-treatment system 10 in the operating condition through the first circulation pipeline 21 for purification treatment. After the second sub-treatment system 20 is preheated, the second sub-treatment system 20 is in an operating condition at this time, the first valve 50 and the third valve 40 are closed, the second valve 80 is opened, the smoke inlet of the first sub-treatment system 10 is disconnected from the smoke outlet of the second sub-treatment system 20, all the smoke of the smoke source enters the second sub-treatment system 20 for purification treatment, and the first sub-treatment system 10 can be maintained in an idle state.
It is understood that the second sub-treatment system 20 may further have a second smoke exhaust duct 22, the second smoke exhaust duct 22 being in communication with the smoke outlet of the second sub-treatment system 20, the second smoke exhaust duct 22 being provided with a fourth valve 30. When the second sub-treatment system 20 is in operation, the fourth valve 30 is opened, and the flue gas exits the second sub-treatment system 20 through the second flue gas exhaust pipe 22.
In practical application, the flue gas of the glass melting furnace generally comprises components such as nitrified substances, sulfides, dust and the like, and meanwhile, the flue gas also has higher waste heat temperature. As shown in fig. 2 and 3, the first sub-processing system 10 includes a first exhaust-heat boiler 13, a first denitration reactor 14, a first desulfurization tower 15, and a first dust remover 16; the first waste heat boiler 13 is used for exchanging heat with high-temperature flue gas so as to fully utilize the waste heat of the flue gas; the first denitration reactor 14 is used for filtering nitrated compounds, the first desulfurization tower 15 is used for filtering sulfides, and the first dust remover 16 is used for filtering dust, so that the temperature and the components of the flue gas reach the emission standard. The second sub-treatment system 20 correspondingly includes a second exhaust-heat boiler 23, a second denitration reactor 24, a second desulfurization tower 25 and a second dust remover 26, and the functions of the processing links of the second sub-treatment system 20 are similar to those of the first sub-treatment system 10, and are not described again here.
Further, the flue gas treatment system also comprises a temperature sensor and a controller electrically connected with the temperature sensor; the temperature sensor is used for detecting the preheating temperature of the second sub-processing system 20, and the controller is used for controlling the opening and closing of the first valve 50, the second valve 80, the third valve 40 and the fourth valve 30 according to the preheating temperature.
Specifically, the temperature sensor may be configured to detect the temperature of the second denitration reactor 24, and since the preheating temperature required by the second denitration reactor 24 is higher than other processing steps, if the preheating temperature of the second denitration reactor 24 reaches the preset temperature, the preheating temperature of the whole second sub-processing system 20 may be regarded as reaching the preset temperature.
When the first sub-processing system 10 needs to be overhauled, the preheating temperature of the second sub-processing system 20 is detected, if the preheating temperature of the second sub-processing system 20 is lower than the preset temperature, the controller controls the first valve 50, the second valve 80 and the third valve 40 to be opened, the fourth valve 30 is controlled to be closed, part of smoke in the smoke source enters the second sub-processing system 20, the second sub-processing system 20 is preheated, and then the smoke returns to the first sub-processing system 10 for processing, so that the situation that the smoke preheated by the second sub-processing system 20 is directly discharged without being processed is avoided; if the preheating temperature of the second sub-processing system 20 is greater than or equal to the preset temperature, and the second sub-processing system 20 can normally process the flue gas at this time, the controller controls the first valve 50 and the third valve 40 to be closed, and controls the second valve 80 and the fourth valve 30 to be opened. At this time, the flue gas does not need to enter the first sub-treatment system 10, but is discharged from the second flue gas exhaust pipeline after being normally treated by the second sub-treatment system 20.
Further, as shown in fig. 3 and 4, the flue gas treatment system further includes a second circulation pipeline 11, one end of the second circulation pipeline is communicated with the smoke inlet of the second sub-treatment system 20, the other end of the second circulation pipeline is communicated with the smoke outlet of the first sub-treatment system 10, and a fifth valve 70 is disposed on the second circulation pipeline 11.
Similarly, when the second sub-treatment system 20 needs to be overhauled, the flue gas needs to be switched back to the first sub-treatment system 10 for purification and heat exchange treatment, and the first sub-treatment system 10 needs to be preheated before switching. The second circulation pipeline 11 can make the flue gas preheated by the first sub-treatment system 10 flow to the second sub-treatment system 20 for purification and heat exchange treatment.
For example, when the second sub-processing system 20 needs to be overhauled, the preheating temperature of the first sub-processing system 10 is detected, if the preheating temperature of the first sub-processing system 10 is lower than the preset temperature, the controller controls the first valve 50, the second valve 80, the fourth valve 30 and the fifth valve 70 to be opened, and controls the third valve 40 to be closed, then part of the smoke in the smoke source enters the first sub-processing system 10 to preheat the first sub-processing system 10, and then returns to the second sub-processing system 20 through the second circulation pipeline for processing, so that the situation that the smoke preheated in the first sub-processing system 10 is directly discharged without being processed is avoided; if the preheating temperature of the first sub-processing system 10 is greater than or equal to the preset temperature, and the first sub-processing system 10 can normally process the flue gas at this time, the controller controls the second valve 80 and the fifth valve 70 to be closed, and controls the first valve 50 to be opened. At this time, the flue gas does not need to enter the second sub-treatment system 20, but is discharged after being normally treated by the first sub-treatment system 10.
The second circulation pipeline 11 is arranged, so that the first sub-processing system 10 and the second sub-processing system 20 can be switched to be standby. Under the preheating working condition of the first sub-treatment system 10, the second sub-treatment system 20 is in the running working condition; under the operation condition of the first sub-treatment system 10, the second sub-treatment system 20 is in a preheating condition or an idle maintenance state; in the idle state of the first sub-processing system 10, the second sub-processing system 20 is in operation. Therefore, in each matched use state of the first sub-treatment system 10 and the second sub-treatment system 20, an effective preheating and treatment path can be formed for the flue gas, the flue gas is fully utilized for preheating the two treatment systems, effective purification and heat exchange treatment of the flue gas can be realized, and the overall energy-saving and emission-reduction effects of the flue gas treatment system are improved.
In practical applications, as shown in fig. 3 and 4, the flue gas treatment system further includes a first flue gas exhaust pipeline 12, the first flue gas exhaust pipeline 12 is communicated with the flue gas outlet of the first sub-treatment system 10, and a sixth valve 60 is disposed on the first flue gas exhaust pipeline 12. In the operating state of the first sub-processing system 10, the sixth valve 60 is opened; in the warm-up state of the first sub-processing system 10, the sixth valve is closed 60.
Further, the temperature sensor is used for detecting a preheating temperature of the first sub-processing system 10 or the second sub-processing system 20, and the controller is used for controlling the opening and closing of the first valve 50, the second valve 80, the third valve 40, the fourth valve 30, the fifth valve 70 and the sixth valve 60 according to the preheating temperature. In the present embodiment, if the second sub-processing system 20 needs to be preheated, the first valve 50, the second valve 80, the third valve 40 and the sixth valve 60 are opened, and the fourth valve 30 and the fifth valve 70 are closed; after the second sub-processing system 20 is warmed up, the first valve 50 and the sixth valve 60 are opened, and the second valve 80 and the fifth valve 70 are closed. If the first sub-processing system 10 needs to be warmed up, the corresponding valve is opened or closed as described above.
In practical applications, the first valve 50 and the second valve 80 are preferably flow valves, so that the amount of smoke from the smoke source entering the first sub-treatment system 10 and the second sub-treatment system 20 respectively can be controlled according to practical requirements. Specifically, in the process of processing flue gas by a flue gas processing system, the flow rate of the flue gas needs to reach a certain preset amount, so that a processing device in the flue gas processing system can be in an effective working state; for example, in the operation state of the first sub-processing system 10, and at the same time, the second sub-processing system 20 is in the preheating state, the flue gas of the flue gas source is divided and then enters the first sub-processing system 10 for purification and heat exchange, and also enters the second sub-processing system 20 for preheating, and at this time, the flow rate of the flue gas entering the two sub-processing systems should be controlled by the first valve 50 and the second valve 80, so that the flow rate of the flue gas entering the first sub-processing system 10 can ensure that the first sub-processing system 10 can work effectively, and the stability of the overall operation of the flue gas processing system can be ensured.
Further, as shown in fig. 1 to fig. 3, the first exhaust-heat boiler 13 includes a first heat exchange section 131 and a second heat exchange section 132, and the first heat exchange section 131, the first denitration reactor 14, the second heat exchange section 132, the first desulfurization tower 15 and the first dust remover 16 are sequentially communicated; and/or the second exhaust-heat boiler 23 includes a third heat exchange section 231 and a fourth heat exchange section 232, and the third heat exchange section 231, the second denitration reactor 24, the fourth heat exchange section 232, the second desulfurization tower 25, and the second dust remover 26 are sequentially communicated.
In this embodiment, the first denitration reactor 14 has a better denitration effect under a specific temperature condition, so that the first heat exchange section 131 firstly cools the high-temperature flue gas to a specific temperature and then enters the first denitration reactor 14, so that the denitration effect of the first denitration reactor 14 can be effectively improved; and then, the denitrated flue gas enters the second heat exchange section 132 to carry out secondary heat exchange and cooling, so that the energy-saving and emission-reducing effects of the flue gas treatment system are further improved. The order of the processing elements of the second sub-processing system 20 and the advantageous effects thereof can be referred to the first sub-processing system 10, and are not described herein again.
The invention also provides a control method corresponding to the flue gas treatment system, wherein the flue gas treatment system comprises:
a first sub-treatment system 10, the smoke inlet of which is communicated with a smoke source through a first valve 50;
a second sub-treatment system 20 having a smoke inlet in communication with a smoke source through a second valve 80;
a first circulation pipeline 21, one end of which is communicated with the smoke inlet of the first sub-treatment system 10, and the other end of which is communicated with the smoke outlet of the second sub-treatment system 20, wherein a third valve 40 is arranged on the first circulation pipeline 21;
the control method of the flue gas treatment system comprises the following steps:
s1: acquiring the preheating temperature of the second sub-processing system 20, comparing the preheating temperature of the second sub-processing system 20 with the preset temperature, and if the preheating temperature of the second sub-processing system 20 is less than the preset temperature, executing step S2; if the preheating temperature of the second sub-processing system 20 is greater than or equal to the preset temperature, executing step S3;
s2: controlling the first valve 50, the second valve 80 and the third valve 40 to be opened;
s3: the first valve 50 and the third valve 40 are controlled to be closed, and the second valve 80 is controlled to be opened.
When the first sub-treatment system 10 needs to be overhauled, the preheating temperature of the second sub-treatment system 20 is obtained, the preheating temperature of the second sub-treatment system 20 is compared with the preset temperature, if the preheating temperature of the second sub-treatment system 20 is smaller than the preset temperature, the controller controls the first valve 50, the second valve 80 and the third valve 40 to be opened, one part of gas of the smoke source directly enters the first sub-treatment system 10 for purification treatment, and the other part of gas enters the second sub-treatment system 20 to preheat the second sub-treatment system 20. After preheating the second sub-treatment system 20, the flue gas continues to flow to the first sub-treatment system 10 in the operating condition through the first circulation pipeline 21 for purification treatment. After the second sub-processing system 20 is preheated, obtaining the preheating temperature of the second sub-processing system 20, comparing the preheating temperature of the second sub-processing system 20 with the preset temperature, wherein the preheating temperature of the second sub-processing system 20 is greater than or equal to the preset temperature, at this time, the second sub-processing system 20 is in a normal operation condition, controlling the first valve 50 and the third valve 40 to be closed, controlling the second valve 80 to be opened, disconnecting the smoke inlet of the first sub-processing system 10 from the smoke outlet of the second sub-processing system 20, allowing all smoke of the smoke source to enter the second sub-processing system 20 for purification treatment, and allowing the first sub-processing system 10 to be maintained in an idle state.
Further, the flue gas treatment system further comprises a second smoke exhaust pipeline 22, the second smoke exhaust pipeline 22 is communicated with the smoke outlet of the second sub-treatment system 20, and a fourth valve 30 is arranged on the second smoke exhaust pipeline 22; the content of step S2 further includes: controlling the fourth valve 30 to close; the content of step S3 further includes: the fourth valve 30 is controlled to open.
When the first sub-processing system 10 needs to be overhauled, the preheating temperature of the second sub-processing system 20 is detected, if the preheating temperature of the second sub-processing system 20 is lower than the preset temperature, the controller controls the first valve 50, the second valve 80 and the third valve 40 to be opened, the fourth valve 30 is controlled to be closed, part of smoke in the smoke source enters the second sub-processing system 20, the second sub-processing system 20 is preheated, and then the smoke returns to the first sub-processing system 10 for processing, so that the situation that the smoke preheated by the second sub-processing system 20 is directly discharged without being processed is avoided; if the preheating temperature of the second sub-processing system 20 is greater than or equal to the preset temperature, and the second sub-processing system 20 can normally process the flue gas at this time, the controller controls the first valve 50 and the third valve 40 to be closed, and controls the second valve 80 and the fourth valve 30 to be opened. At this time, the flue gas does not need to enter the first sub-treatment system 10, but is discharged from the second flue gas exhaust pipeline after being normally treated by the second sub-treatment system 20.
Further, the flue gas treatment system further comprises a second circulation pipeline 11, one end of the second circulation pipeline 11 is communicated with the flue gas inlet of the second sub-treatment system 20, the other end of the second circulation pipeline 11 is communicated with the flue gas outlet of the first sub-treatment system 10, and a fifth valve 70 is arranged on the second circulation pipeline 11; the content of step S2 further includes: the fifth valve 70 is controlled to close.
When the second sub-processing system 20 needs to be overhauled, the preheating temperature of the first sub-processing system 10 is detected, if the preheating temperature of the first sub-processing system 10 is lower than the preset temperature, the controller controls the first valve 50, the second valve 80, the fourth valve 30 and the fifth valve 70 to be opened, and controls the third valve 40 to be closed, part of smoke in the smoke source enters the first sub-processing system 10 to preheat the first sub-processing system 10, and then returns to the second sub-processing system 20 through the second circulation pipeline 11 to be processed, so that the situation that the smoke preheated by the first sub-processing system 10 is directly discharged without being processed is avoided; if the preheating temperature of the first sub-processing system 10 is greater than or equal to the preset temperature, and the first sub-processing system 10 can normally process the flue gas at this time, the controller controls the second valve 80 and the fifth valve 70 to be closed, and controls the first valve 50 to be opened. At this time, the flue gas does not need to enter the second sub-treatment system 20, but is discharged after being normally treated by the first sub-treatment system 10.
Further, the flue gas treatment system further comprises a first flue gas exhaust pipeline 12, the first flue gas exhaust pipeline 12 is communicated with a flue gas outlet of the first sub-treatment system 10, and a sixth valve 60 is arranged on the first flue gas exhaust pipeline 12; the content of step S2 further includes: the sixth valve 60 is controlled to open.
When the second sub-processing system 20 needs to be overhauled, the preheating temperature of the first sub-processing system 10 is detected, if the preheating temperature of the first sub-processing system 10 is lower than the preset temperature, the controller controls the first valve 50, the second valve 80, the fourth valve 30, the fifth valve 70 and the sixth valve 60 to be opened, and controls the third valve 40 to be closed, part of smoke in the smoke source enters the first sub-processing system 10, preheats the first sub-processing system 10, then returns to the second sub-processing system 20 through the second circulation pipeline 11 to be processed, and finally is discharged through the first smoke discharge pipeline 12, so that the situation that the smoke preheated by the first sub-processing system 10 is directly discharged without being processed is avoided; if the preheating temperature of the first sub-processing system 10 is greater than or equal to the preset temperature, and the first sub-processing system 10 can normally process the flue gas at this time, the controller controls the second valve 80 and the fifth valve 70 to be closed, and controls the first valve 50 to be opened. At this time, the flue gas does not need to enter the second sub-treatment system 20, but is discharged after being normally treated by the first sub-treatment system 10.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A flue gas treatment system, comprising:
the smoke inlet of the first sub-processing system is communicated with a smoke source through a first valve;
the smoke inlet of the second sub-treatment system is communicated with the smoke source through a second valve;
one end of the first circulation pipeline is communicated with the smoke inlet of the first sub-treatment system, the other end of the first circulation pipeline is communicated with the smoke outlet of the second sub-treatment system, and a third valve is arranged on the first circulation pipeline;
the first sub-processing system and the second sub-processing system have an idle state, a preheating working condition and an operating working condition;
when the second sub-treatment system is in a preheating working condition, the first sub-treatment system is in an operating working condition, the first valve, the second valve and the third valve are opened, one part of gas of the smoke source directly enters the first sub-treatment system for purification treatment, and the other part of gas enters the second sub-treatment system for preheating the second sub-treatment system;
after preheating the second sub-treatment system by the flue gas, continuously flowing to the first sub-treatment system through the first circulating pipeline for purification treatment;
and after the second sub-treatment system is preheated, closing the first valve and the third valve, opening the second valve, and disconnecting the smoke inlet of the first sub-treatment system from the smoke outlet of the second sub-treatment system.
2. The flue gas treatment system of claim 1, further comprising a second smoke evacuation pipeline, the second smoke evacuation pipeline being in communication with the smoke outlet of the second sub-treatment system, the second smoke evacuation pipeline having a fourth valve disposed thereon.
3. The flue gas treatment system of claim 2, further comprising a temperature sensor and a controller electrically connected to the temperature sensor, wherein the temperature sensor is configured to detect a preheating temperature of the second sub-treatment system, and the controller is configured to control the opening and closing of the first valve, the second valve, the third valve, and the fourth valve according to the preheating temperature.
4. The flue gas treatment system according to claim 3, wherein the flue gas treatment system further comprises a second circulation pipeline, one end of the second circulation pipeline is communicated with the smoke inlet of the second sub-treatment system, the other end of the second circulation pipeline is communicated with the smoke outlet of the first sub-treatment system, and a fifth valve is arranged on the second circulation pipeline.
5. The flue gas treatment system of claim 4, further comprising a first smoke evacuation pipeline, the first smoke evacuation pipeline being in communication with the smoke outlet of the first sub-treatment system, the first smoke evacuation pipeline having a sixth valve disposed thereon.
6. The flue gas treatment system of claim 5, wherein the temperature sensor is configured to detect a preheating temperature of the first sub-treatment system or the second sub-treatment system, and the controller is configured to control opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve according to the preheating temperature.
7. A method of controlling a flue gas treatment system, the flue gas treatment system comprising:
the smoke inlet of the first sub-processing system is communicated with a smoke source through a first valve;
the smoke inlet of the second sub-treatment system is communicated with the smoke source through a second valve;
one end of the first circulation pipeline is communicated with the smoke inlet of the first sub-treatment system, the other end of the first circulation pipeline is communicated with the smoke outlet of the second sub-treatment system, and a third valve is arranged on the first circulation pipeline;
the control method of the flue gas treatment system comprises the following steps:
s1: acquiring the preheating temperature of the second sub-processing system, comparing the preheating temperature of the second sub-processing system with the preset temperature, and executing the step S2 if the preheating temperature of the second sub-processing system is less than the preset temperature; if the preheating temperature of the second sub-processing system is greater than or equal to the preset temperature, executing step S3;
s2: controlling the first valve, the second valve and the third valve to be opened;
s3: and controlling the first valve and the third valve to close, and controlling the second valve to open.
8. The method for controlling a flue gas treatment system according to claim 7, wherein the flue gas treatment system further comprises a second smoke exhaust pipeline, the second smoke exhaust pipeline is communicated with the smoke outlet of the second sub-treatment system, and a fourth valve is arranged on the second smoke exhaust pipeline;
the content of step S2 further includes: controlling the fourth valve to close;
the content of step S3 further includes: and controlling the fourth valve to be opened.
9. The method according to claim 8, wherein the flue gas treatment system further comprises a second circulation pipeline, one end of the second circulation pipeline is communicated with the smoke inlet of the second sub-treatment system, the other end of the second circulation pipeline is communicated with the smoke outlet of the first sub-treatment system, and a fifth valve is arranged on the second circulation pipeline;
the content of step S2 further includes: and controlling the fifth valve to be closed.
10. The method for controlling a flue gas treatment system according to claim 9, wherein the flue gas treatment system further comprises a first smoke exhaust pipeline, the first smoke exhaust pipeline is communicated with the smoke outlet of the first sub-treatment system, and a sixth valve is arranged on the first smoke exhaust pipeline;
the content of step S2 further includes: and controlling the sixth valve to be opened.
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| CN1381298A (en) * | 2001-04-20 | 2002-11-27 | 清华大学 | Cleaning process and equipment for burning and exhausting low-concentration organic waste gas |
| CN206257964U (en) * | 2016-11-30 | 2017-06-16 | 山东华顺环保科技股份有限公司 | A kind of flue gas waste heat utilization device |
| CN107630736B (en) * | 2017-11-10 | 2020-06-26 | 潍柴动力股份有限公司 | Multi-carrier SCR assembly and working method thereof |
| CN108225037B (en) * | 2018-03-02 | 2023-11-10 | 西安西热锅炉环保工程有限公司 | Waste heat utilization and flue gas purification system of electrolysis flue gas |
| CN207991293U (en) * | 2018-03-02 | 2018-10-19 | 西安西热锅炉环保工程有限公司 | A kind of UTILIZATION OF VESIDUAL HEAT IN and flue gas purification system of electrolysis flue gas |
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