CN107115765B - Waste gas treatment device and method - Google Patents
Waste gas treatment device and method Download PDFInfo
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- CN107115765B CN107115765B CN201710507872.0A CN201710507872A CN107115765B CN 107115765 B CN107115765 B CN 107115765B CN 201710507872 A CN201710507872 A CN 201710507872A CN 107115765 B CN107115765 B CN 107115765B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
Abstract
The invention relates to a waste gas treatment device and a waste gas treatment method, which comprise a first waste gas treatment tower, a second waste gas treatment tower and a waste gas inlet pipe, wherein the waste gas inlet pipe is connected with a gas inlet of the first waste gas treatment tower through a first pipeline, and a gas outlet of the first waste gas treatment tower is connected with a gas inlet of the second waste gas treatment tower through a second pipeline. A first branch is led out from the waste gas inlet pipe, and the waste gas inlet pipe is communicated with the second pipeline through the first branch. The first pipeline is provided with a first valve, the first branch is provided with a second valve, the second pipeline is provided with a third valve at a gas outlet close to the first waste gas treatment tower, and the second valve is interlocked with the first valve and the third valve respectively. And a detection device is arranged on the waste gas inlet pipe and used for detecting the acidity or alkalinity of waste gas in the waste gas inlet pipe, and the detection device is connected with the second valve for communication. The invention has simple structure, can effectively treat acid and alkali waste gas, has good flexibility and can greatly reduce the operation cost.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device and method.
Background
The waste gas treatment mainly refers to the treatment of industrial waste gas such as dust particles, smoke and dust, peculiar smell gas and toxic and harmful gas generated in industrial places. Common waste gas treatment includes factory smoke waste gas purification, workshop dust waste gas purification, organic waste gas purification, waste gas peculiar smell purification, acid-base waste gas purification, chemical waste gas purification and the like. The common methods are as follows: the water absorption method, the aeration activated sludge deodorization method and the multi-medium catalytic oxidation process have the advantages that the waste gas pollutes air seriously, so strict requirements are made for waste gas treatment environmental protection departments of chemical plants, and the waste gas can be discharged after the treatment of each plant reaches the standard.
In the prior art, according to the acidity and alkalinity of waste gas generated in industrial production, two sets of independent waste gas treatment devices are usually adopted, namely an acidic waste gas treatment device and an alkaline waste gas treatment device, so that great inconvenience is brought in actual production, the investment cost is increased, and the production flexibility is poor.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide an exhaust gas treatment device and method with simple structure and good flexibility.
In order to solve the above technical problem, a first aspect of the present invention provides an exhaust gas treatment device, which includes a first exhaust gas treatment tower, a second exhaust gas treatment tower, and an exhaust gas inlet pipe, wherein the exhaust gas inlet pipe is connected to an inlet of the first exhaust gas treatment tower through a first pipeline so that the exhaust gas can enter the first exhaust gas treatment tower for treatment, an outlet of the first exhaust gas treatment tower is connected to an inlet of the second exhaust gas treatment tower through a second pipeline,
a first branch is led out of the waste gas inlet pipe, the first branch enables the waste gas inlet pipe to be communicated with the second pipeline,
the first pipeline is provided with a first valve, the first branch is provided with a second valve, the second pipeline is provided with a third valve at the gas outlet close to the first waste gas treatment tower, the second valve is respectively interlocked with the first valve and the third valve,
and a detection device is arranged on the waste gas inlet pipe and used for detecting the acidity and alkalinity of waste gas in the waste gas inlet pipe, and the detection device is connected with the second valve for communication.
Furthermore, the device also comprises an induced draft fan, the gas outlet of the second waste gas treatment tower is connected with the induced draft fan through a first discharge pipeline, a second branch is led out from the second pipeline, the second branch enables the second pipeline to be communicated with the first discharge pipeline,
a fourth valve is arranged on the second pipeline after the second branch is separated, a fifth valve is arranged on the second branch, a sixth valve is arranged on the first exhaust pipeline close to the gas outlet of the second waste gas treatment tower, the fifth valve is respectively interlocked with the fourth valve and the sixth valve,
the detection device is also in communication with the fifth valve connection.
Further, the first waste gas treatment tower and the second waste gas treatment tower respectively comprise a storage tank, a tower body and a circulating pump, the tower body is arranged on the upper portion of the storage tank, the interior of the tower body is communicated with the interior of the storage tank, an inlet of the circulating pump is communicated with the storage tank through a first circulating pipeline, an outlet of the circulating pump is communicated with the tower body through a second circulating pipeline,
and an absorbent solution for absorbing impurities in the gas to be treated is stored in the storage tank.
Further, the absorbent solution stored in the storage tank of the first waste gas treatment tower is used for absorbing acid gas impurities in the waste gas, and the absorbent solution stored in the second waste gas treatment tower is used for absorbing alkaline gas impurities in the waste gas.
Further, the circulating pump of the first waste gas treatment tower is interlocked with the second valve, and the circulating pump of the second waste gas treatment tower is interlocked with the fifth valve.
Further, the air inlet is close to the hold up tank sets up on the tower body, the gas outlet sets up the tower body top, be equipped with gas distribution device in the tower body, gas distribution device with the air inlet is connected, makes follow the gas that the air inlet got into can evenly distributed in the tower body.
Further, a liquid distributor is arranged in the tower body and close to the air outlet, and the liquid distributor is communicated with the second circulating pipeline, so that liquid entering from the second circulating pipeline can be uniformly distributed in the tower body.
Furthermore, a defoaming device is arranged in the tower body and used for removing foams carried in the treated gas, and the defoaming device is arranged between the gas outlet and the liquid distributor.
The second aspect of the present invention also provides an exhaust gas treatment method using any one of the exhaust gas treatment devices provided in the first aspect of the present invention, specifically, the exhaust gas treatment method includes the steps of:
1) the detection device detects the acidity and alkalinity of the waste gas in the waste gas inlet pipe, and if the waste gas is acidic, a signal that the waste gas is acidic is output;
2) and when the second valve receives a signal that the exhaust gas in the exhaust gas inlet pipe detected by the detection device is acidic, closing actions are executed, and at the moment, the first valve and the third valve respectively receive the closing signal of the second valve and respectively execute opening actions.
Further, the step 2) is followed by the following step 3): and when the fifth valve receives a signal that the waste gas in the waste gas inlet pipe detected by the detection device is acidic, the fifth valve executes opening action, and at the moment, the fourth valve and the sixth valve respectively receive the opening signal of the fifth valve and respectively execute closing action.
The waste gas treatment device and the method have the following beneficial effects:
the waste gas treatment device of the invention leads a first branch on a waste gas inlet pipe to enable the waste gas inlet pipe to be communicated with a second pipeline, the first pipeline is provided with a first valve, the first branch is provided with a second valve, the second pipeline is provided with a third valve near an air outlet of a first waste gas treatment tower, the second valve is respectively interlocked with the first valve and the third valve, a detection device for detecting the acidity and alkalinity of the waste gas is arranged on the waste gas inlet pipe and is communicated with the second valve, so that when the detection device detects that the waste gas is acidic, the corresponding valve interlocking action can be triggered to enable the waste gas to enter the first waste gas treatment tower for treatment, when the waste gas is alkaline, the corresponding valve interlocking action can be triggered to enable the waste gas to enter the second waste gas treatment tower for treatment, thereby greatly simplifying the waste gas treatment device, the cost is reduced, and the production flexibility is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment 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 invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural view of an exhaust gas treatment device according to an embodiment of the present invention;
in the figure: 10-detection device, 20-first waste gas treatment tower, 30-second waste gas treatment tower, 40-induced draft fan, 50-discharge device, 21, 31-storage tank, 22, 32-tower body, 221, 321-air inlet, 222, 322-air outlet, 223, 323-gas distribution device, 224, 324-liquid distributor, 225, 325-defoaming device, 226, 326-packing bed layer, 201, 301-circulating pump, 201a, 301 a-first circulating pipeline, 201b, 301 b-second circulating pipeline, 1-waste gas inlet pipe, 2-first pipeline, 3-second pipeline, 4-first branch, 5-first exhaust pipeline, 6-second branch, 7-second exhaust pipeline, and k 1-k 6 valve
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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Example 1
The embodiment provides an exhaust gas treatment device with simple structure and good flexibility, and particularly, please refer to fig. 1.
The exhaust gas treatment system shown in fig. 1 includes a first exhaust gas treatment tower 20 and a second exhaust gas treatment tower 30, each of the first exhaust gas treatment tower 20 and the second exhaust gas treatment tower 30 includes a storage tank 21, 31, a tower body 22, 32 and a circulation pump 201, 301, the tower body 22, 32 is disposed on the upper portion 21, 31 of the storage tank, the tower body 22, 32 is internally communicated with the storage tank 21, 31, an inlet of the circulation pump 201, 301 is communicated with the storage tank 21, 31 through a first circulation pipeline 201a, 301a, and an outlet of the circulation pump 201, 301 is communicated with the tower body 22, 32 through a second circulation pipeline 201b, 301 b. The storage tanks 21, 31 store therein an absorbent solution for absorbing impurities in the gas to be treated. When the first exhaust gas treatment tower 20 and the second exhaust gas treatment tower 30 are in operation, the circulation pumps 201, 301 pump the absorbent solution in the storage tanks 21, 31, for example, in the tower bodies 22, 32.
In one embodiment, the waste gas treatment device further comprises an induced draft fan 40, wherein the tower body 22 and the tower body 32 are provided with gas inlets 221 and 321 and gas outlets 222 and 322, the gas inlets 221 and 321 are used for allowing gas to be treated to enter the tower body 22 and the tower body 32, the gas outlets 222 and 322 are used for discharging treated gas out of the tower body 22 and the tower body 32, the gas inlets 221 and 321 are close to the storage tanks 21 and 31 and arranged on the tower body 22 and the tower body 32, and the gas outlets 222 and 322 are arranged at the top of the tower body 22 and the tower body 32. The exhaust gas inlet pipe 1 is connected to the gas inlet 221 of the first exhaust gas treatment tower 20 via the first pipe 2, so that the exhaust gas can enter the first exhaust gas treatment tower 20 for treatment. The gas outlet 222 of the first exhaust gas treatment tower 20 is connected with the gas inlet 321 of the second exhaust gas treatment tower 30 through the second pipeline 3, the gas outlet 322 of the second exhaust gas treatment tower 30 is connected with the induced draft fan 40 through the first exhaust pipeline 5, and the treated gas is discharged by the induced draft fan 40.
In one embodiment, a first branch 4 leads from the exhaust gas inlet pipe 1, the first branch 4 connecting the exhaust gas inlet pipe 1 to the second line 3. The first pipeline 2 is provided with a first valve k1, the first branch 4 is provided with a second valve k2, the second pipeline 3 is provided with a third valve k3 near the gas outlet 222 of the first exhaust gas treatment tower 20, the second valve k2 is interlocked with the first valve k1 and the third valve k3 respectively, when the second valve k2 performs an opening action, the first valve k1 and the third valve k3 are interlocked to perform a closing action, and when the second valve k2 performs a closing action, the first valve k1 and the third valve k3 are interlocked to perform an opening action.
The exhaust gas inlet pipe 1 is provided with a detection device 10, the detection device 10 is used for detecting the acidity or alkalinity of the exhaust gas in the exhaust gas inlet pipe 1, and the detection device 10 is connected and communicated with the second valve k 2.
When the detecting device 10 detects that the exhaust gas in the exhaust gas inlet pipe 1 is acidic, a corresponding exhaust gas acidity signal is generated and output, the second valve k2 receives the exhaust gas acidity signal and performs a closing action, and since the second valve k2 is interlocked with the first valve k1 and the third valve k3 respectively, when the second valve k2 performs a closing action, the first valve k1 and the third valve k3 receive a signal that the second valve k2 is closed respectively, and at this time, the first valve k1 and the third valve k3 perform an opening action respectively, so that the exhaust gas inlet pipe 1 is communicated with the first pipeline 2, and the exhaust gas enters the first exhaust gas treatment tower 20 for treatment. In this embodiment, the absorbent solution stored in the storage tank 21 of the first off-gas treatment tower 20 is used to absorb acid gas impurities in the off-gas.
When the detecting device 10 detects that the exhaust gas in the exhaust gas inlet pipe 1 is neutral, a corresponding signal that the exhaust gas is neutral is generated, and the signal is output, the second valve k2 receives the signal that the exhaust gas is neutral and performs an opening action, because the second valve k2 is interlocked with the first valve k1 and the third valve k3 respectively, when the second valve k2 performs a closing and opening action, the first valve k1 and the third valve k3 receive the signal that the second valve k2 is opened respectively, and at this time, the first valve k1 and the third valve k3 perform a closing action respectively, so that the exhaust gas in the exhaust gas inlet pipe can be directly discharged without being processed, thereby saving the processing cost and having good flexibility.
In one embodiment, the circulation pump 201 of the first off-gas treatment tower 20 is interlocked with the second valve k 2. When the second valve k2 is closed, the circulation pump 201 receives a signal that the second valve 201 is closed, and starts the motor to operate according to the signal; when the second valve k2 is opened, the circulation pump 201 receives a signal that the second valve k2 is opened, and stops the motor according to the signal, and stops the operation. When the second valve k2 is closed, the first valve k1 and the third valve k3 are opened, and the exhaust gas in the exhaust gas inlet pipe 1 enters the first exhaust gas treatment tower 20 for treatment, at this time, the circulation pump 201 can spray the absorbent solution into the tower body 22 in time to treat the exhaust gas. Since the second valve k2 is opened and the first valve k1 and the third valve k3 are closed, no waste gas enters the first waste gas treatment tower 20, and at this time, the circulation pump 201 is turned off to stop the spraying of the absorbent solution into the tower body 22. By adopting the control mode, not only can acid gas impurities in the waste gas be effectively treated, but also the energy consumption can be saved, and the operation cost can be reduced.
In one embodiment, a liquid distributor 224, 324 is provided in the tower body 22, 32 near the gas outlet 222, 322, and the liquid distributor 224, 324 is communicated with the second circulation pipe 201b, 301b, so that the liquid entering from the second circulation pipe 201b, 301b can be uniformly distributed in the tower body 22, 32.
In order to make the gas entering the tower body 22, 32 uniformly distributed in the tower body, thereby enhancing the treatment effect, in one embodiment, a gas distribution device 223, 323 is provided in the tower body 22, 32, and the gas distribution device 223, 323 is connected with the gas inlet 221, 321, so that the gas entering from the gas inlet 221, 321 can be uniformly distributed in the tower body 22, 32. In order to increase the contact area between the gas to be treated and the absorbent solution, a bed of packing is also provided in the column 22, 32, which is arranged between the gas distributor 223, 323 and the liquid distributor 224, 324.
In one embodiment, a second branch 6 leads from the second line 3, the second branch 6 connecting the second line 3 to the first discharge line 5.
The second pipeline 3 is provided with a fourth valve k4 after the second branch 6 is branched, the second branch 6 is provided with a fifth valve k5, the first discharge pipeline 5 is provided with a sixth valve k6 near the gas outlet 332 of the second exhaust gas treatment tower 30, and the fifth valve k5 is interlocked with the fourth valve k4 and the sixth valve k6, respectively. When the fifth sub-valve k5 performs an opening action, the fourth valve k4 and the sixth valve k6 are interlocked to perform a closing action, and when the fifth valve k5 performs a closing action, the fourth valve k4 and the sixth valve k6 are interlocked to perform an opening action.
The detection device 10 is also in communication with the fifth valve k 5.
When the detecting device 10 detects that the exhaust gas in the exhaust gas inlet pipe 1 is acidic or neutral, a corresponding signal indicating that the exhaust gas is acidic or neutral is generated and output, the fifth valve k5 receives the signal indicating that the exhaust gas is acidic or neutral and performs an opening operation, and since the fifth valve k5 is interlocked with the fourth valve k4 and the sixth valve k6, respectively, when the fifth valve k5 performs the opening operation, the fourth valve k4 and the sixth valve k6 receive the signal indicating that the fifth valve k5 is opened, respectively, and at this time, the fourth valve k4 and the sixth valve k6 perform a closing operation, respectively, so that the gas in the second pipeline 3 does not pass through the second exhaust gas treatment tower 30. In this embodiment, the absorbent solution stored in the storage tank 31 of the second off-gas treatment tower 30 is used to absorb alkaline gas impurities in the off-gas.
When the detecting device 10 detects that the exhaust gas in the exhaust gas inlet pipe 1 is alkaline, a corresponding exhaust gas alkaline signal is generated and output, the second valve k2 receives the exhaust gas alkaline signal and performs an opening action, and since the second valve k2 is interlocked with the first valve k1 and the third valve k3 respectively, when the second valve k2 performs a closing and opening action, the first valve k1 and the third valve k3 receive a signal that the second valve k2 is opened respectively, and at this time, the first valve k1 and the third valve k3 perform a closing action respectively, so that the exhaust gas inlet pipe 1 is communicated with the second pipeline 3. Meanwhile, the fifth valve k5 receives the signal that the exhaust gas is alkaline and performs a closing action, since the fifth valve k5 is interlocked with the fourth valve k4 and the sixth valve k6, respectively, when the fifth valve k5 performs a closing action, the fourth valve k4 and the sixth valve k6 receive the signal that the fifth valve k5 is closed, and at this time, the fourth valve k4 and the sixth valve k6 perform an opening action, respectively, so that the gas in the second pipeline 3 enters the second exhaust gas treatment tower 30 for treatment, thereby enabling the alkaline exhaust gas in the exhaust gas inlet pipe 1 to directly enter the second exhaust gas treatment tower 30 for treatment.
In one embodiment, the circulation pump 301 of the second off-gas treatment tower 30 is interlocked with the fifth valve k 5. When the fifth valve k5 is closed, the circulating pump 301 receives a signal that the fifth valve 301 is closed, and starts the motor to operate according to the signal; when the fifth valve k5 is opened, the circulation pump 301 receives a signal that the fifth valve k5 is opened, and stops the motor according to the signal, and stops the operation. When the fifth valve k5 is closed, the fourth valve k4 and the sixth valve k6 are opened, so that the waste gas in the waste gas inlet pipe 1 can enter the second waste gas treatment tower 30 for treatment, and at this time, the circulating pump 301 can timely spray the absorbent solution into the tower body 32 to treat the waste gas. Since the fifth valve k5 is opened and the second valve k2 and the sixth valve k6 are closed, no waste gas enters the second waste gas treatment tower 30, and at this time, the circulation pump 301 is turned off to stop the absorbent solution from being sprayed into the tower body 32. By adopting the control mode, the alkaline gas impurities in the waste gas can be effectively treated, the energy consumption can be saved, and the operation cost can be reduced.
In one embodiment, a demister 225, 325 is provided in the tower 22, 32, the demister 225, 325 being configured to remove entrained foam from the treated gas, the demister 225, 325 being arranged between the gas outlet 222, 322 and the liquid distributor 224, 324.
In one embodiment, the exhaust gas treatment system further comprises an exhaust device 50, wherein the exhaust device 50 is arranged behind the induced draft fan 40 and is connected with the outlet of the induced draft fan 40 through the second exhaust pipeline 6, so that the gas exhausted from the induced draft fan 40 can enter the exhaust device 50 and be exhausted by the exhaust device 50. The distance between the gas outlet of the discharging device 50 and the ground is required to be not less than 15 m so as to meet the standard of environmental protection.
The waste gas treatment device and the method have the following beneficial effects:
the waste gas treatment device of the invention leads a first branch on a waste gas inlet pipe to enable the waste gas inlet pipe to be communicated with a second pipeline, the first pipeline is provided with a first valve, the first branch is provided with a second valve, the second pipeline is provided with a third valve near an air outlet of a first waste gas treatment tower, the second valve is respectively interlocked with the first valve and the third valve, a detection device for detecting the acidity and alkalinity of the waste gas is arranged on the waste gas inlet pipe and is communicated with the second valve, so that when the detection device detects that the waste gas is acidic, the corresponding valve interlocking action can be triggered to enable the waste gas to enter the first waste gas treatment tower for treatment, when the waste gas is alkaline, the corresponding valve interlocking action can be triggered to enable the waste gas to enter the second waste gas treatment tower for treatment, thereby greatly simplifying the waste gas treatment device, the cost is reduced, and the production flexibility is improved.
The foregoing description has disclosed fully preferred embodiments of the present invention. It should be noted that those skilled in the art can make modifications to the embodiments of the present invention without departing from the scope of the appended claims. Accordingly, the scope of the appended claims is not to be limited to the specific embodiments described above.
Claims (7)
1. An exhaust gas treatment device, comprising a first exhaust gas treatment tower, a second exhaust gas treatment tower, and an exhaust gas inlet pipe, wherein the exhaust gas inlet pipe is connected with an air inlet of the first exhaust gas treatment tower through a first pipeline so that the exhaust gas can enter the first exhaust gas treatment tower for treatment, an air outlet of the first exhaust gas treatment tower is connected with an air inlet of the second exhaust gas treatment tower through a second pipeline,
a first branch is led out of the waste gas inlet pipe, the first branch enables the waste gas inlet pipe to be communicated with the second pipeline,
the first pipeline is provided with a first valve, the first branch is provided with a second valve, the second pipeline is provided with a third valve at the gas outlet close to the first waste gas treatment tower, the second valve is respectively interlocked with the first valve and the third valve,
the waste gas inlet pipe is provided with a detection device, the detection device is used for detecting the acidity or alkalinity of waste gas in the waste gas inlet pipe, and the detection device is connected and communicated with the second valve;
the first waste gas treatment tower and the second waste gas treatment tower respectively comprise a storage tank, a tower body and a circulating pump, the tower body is arranged on the upper part of the storage tank, the interior of the tower body is communicated with the interior of the storage tank, the inlet of the circulating pump is communicated with the storage tank through a first circulating pipeline, the outlet of the circulating pump is communicated with the tower body through a second circulating pipeline,
an absorbent solution for absorbing impurities in the gas to be treated is stored in the storage tank;
the absorbent solution stored in the storage tank of the first waste gas treatment tower is used for absorbing acid gas impurities in the waste gas, and the absorbent solution stored in the second waste gas treatment tower is used for absorbing alkaline gas impurities in the waste gas;
the device also comprises an induced draft fan, the gas outlet of the second waste gas treatment tower is connected with the induced draft fan through a first discharge pipeline, a second branch is led out from the second pipeline, the second branch enables the second pipeline to be communicated with the first discharge pipeline,
a fourth valve is arranged on the second pipeline after the second branch is separated, a fifth valve is arranged on the second branch, a sixth valve is arranged on the first exhaust pipeline close to the gas outlet of the second waste gas treatment tower, the fifth valve is respectively interlocked with the fourth valve and the sixth valve,
the detection device is also in communication with the fifth valve connection.
2. The exhaust treatment device of claim 1, wherein the circulation pump of the first exhaust treatment tower is interlocked with the second valve and the circulation pump of the second exhaust treatment tower is interlocked with the fifth valve.
3. The waste gas treatment device of claim 1, wherein the gas inlet is disposed on the tower body near the storage tank, the gas outlet is disposed at the top of the tower body, and a gas distribution device is disposed in the tower body and connected to the gas inlet, so that the gas entering from the gas inlet can be uniformly distributed in the tower body.
4. An exhaust gas treatment device according to claim 3, wherein a liquid distributor is provided in the tower body adjacent to the gas outlet, the liquid distributor communicating with the second circulation line so that the liquid introduced from the second circulation line can be uniformly distributed in the tower body.
5. The waste gas treatment device of claim 4, wherein a defoaming device is arranged in the tower body and used for removing foams entrained in the treated gas, and the defoaming device is arranged between the gas outlet and the liquid distributor.
6. An exhaust gas treatment method characterized by performing exhaust gas treatment using the exhaust gas treatment device according to any one of claims 1 to 5, comprising the steps of:
1) the detection device detects the acidity and alkalinity of the waste gas in the waste gas inlet pipe, and if the waste gas is acidic, a signal that the waste gas is acidic is output;
2) and when the second valve receives a signal that the exhaust gas in the exhaust gas inlet pipe detected by the detection device is acidic, closing actions are executed, and at the moment, the first valve and the third valve respectively receive the closing signal of the second valve and respectively execute opening actions.
7. An exhaust gas treatment method according to claim 6, further comprising the following step 3) after said step 2): and when the fifth valve receives a signal that the waste gas in the waste gas inlet pipe detected by the detection device is acidic, the fifth valve executes opening action, and at the moment, the fourth valve and the sixth valve respectively receive the opening signal of the fifth valve and respectively execute closing action.
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| CN201710507872.0A CN107115765B (en) | 2017-06-28 | 2017-06-28 | Waste gas treatment device and method |
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| CN201710507872.0A CN107115765B (en) | 2017-06-28 | 2017-06-28 | Waste gas treatment device and method |
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| CN108273345A (en) * | 2018-03-29 | 2018-07-13 | 朱友富 | Environment-protecting type exhaust air processing unit |
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