CN111773917A - Nutrient solution automatic compensation system for waste gas biological treatment device - Google Patents
Nutrient solution automatic compensation system for waste gas biological treatment device Download PDFInfo
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- CN111773917A CN111773917A CN202010696719.9A CN202010696719A CN111773917A CN 111773917 A CN111773917 A CN 111773917A CN 202010696719 A CN202010696719 A CN 202010696719A CN 111773917 A CN111773917 A CN 111773917A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a nutrient solution automatic compensation system for a waste gas biological treatment device, which comprises a detection device, a control device, a nutrient solution storage container and a liquid pump device, wherein the detection device is connected with the control device; the detection device is used for detecting the concentration of organic matters in the waste gas entering the biological treatment device; one end of the liquid pump device is connected with the nutrient solution storage container, and the other end of the liquid pump device is connected with the biological treatment device and is used for pumping the nutrient solution in the nutrient solution storage container into the biological treatment device; the control device is used for controlling the working state of the liquid pump device according to the feedback of the detection device. By adopting the nutrient solution automatic compensation system, when the concentration of organic matters entering the biological treatment device is detected to be lower, the nutrient solution can be automatically supplemented into the biological treatment device, so that the biological treatment device can keep the microorganism concentration at a higher level even when the waste gas with low concentration is discharged, and the waste gas can be discharged after reaching the standard at any time.
Description
Technical Field
The invention relates to the technical field of waste gas biological treatment systems, in particular to a nutrient solution automatic compensation system for a waste gas biological treatment device.
Background
At present, a biological spray tower device is often adopted for treating the foul waste gas. When the gas passes through the microorganism layer, pollutants (organic matters) in the malodorous gas are captured and degraded by the microorganisms to generate substances such as nontoxic and odorless carbon dioxide, water and the like, thereby achieving the aim of purification. During long-time operation, the microorganisms in the biological spray tower use organic matters in the waste gas as main nutrients to realize self growth and propagation. Therefore, the microorganism content in the biological spray tower can change according to the change of the organic matter content in the entering waste gas, and a dynamic balance is achieved, namely, the entering waste gas has high concentration (namely, the organic matter content is high), the microorganism content in the biological spray tower is correspondingly higher, the entering waste gas has low concentration, and the microorganism content in the biological spray tower is correspondingly lower. Therefore, along with the fluctuation of the concentration of the entering waste gas, the concentration of microorganisms in the biological spray tower also fluctuates greatly, and the waste gas can not be discharged up to the standard at any time.
Disclosure of Invention
The invention aims to solve the technical problems and provide an automatic nutrient solution compensation system for a waste gas biological treatment device, so as to ensure that the concentration of microorganisms in the waste gas biological treatment device is kept at a high level in real time, and thus, the real-time standard emission of waste gas is realized.
In order to achieve the aim, the invention discloses a nutrient solution automatic compensation system for a waste gas biological treatment device, which comprises a detection device, a control device, a nutrient solution storage container and a liquid pump device, wherein the detection device is used for detecting the nutrient solution in the waste gas biological treatment device;
one end of the detection device is connected with the air inlet end of the biological treatment device, the other end of the detection device is connected with the control device, and the detection device is used for detecting the concentration of organic matters in the waste gas entering the biological treatment device;
the nutrient solution storage container is used for storing nutrient solution required by microorganisms in the biological treatment device;
one end of the liquid pump device is connected with the nutrient solution storage container, and the other end of the liquid pump device is connected with the biological treatment device and is used for pumping nutrient solution in the nutrient solution storage container into the biological treatment device;
and the control device is used for controlling the working state of the liquid pump device according to the feedback of the detection device.
Compared with the prior art, the nutrient solution automatic compensation system for the waste gas biological treatment device comprises a detection device, a control device, a nutrient solution storage container and a liquid pump device, wherein the detection device detects the concentration of organic matters in waste gas entering the biological treatment device in real time during working, the control device controls the working state of the liquid pump device according to the detected concentration of the organic matters, and when the concentration of the organic matters entering the biological treatment device is detected to be lower, the control device controls the liquid pump device to be started to supplement the nutrient solution in the nutrient solution storage container to the biological treatment device at a certain speed, so that the biological treatment device is kept at a higher level of microorganism concentration even when the waste gas is low in concentration, and the waste gas is discharged after reaching the standard at any time; when the detection device detects that the concentration of the organic matters entering the biological treatment device is higher, the liquid pump device is closed, and the nutrient solution is reasonably utilized.
Preferably, the detection device is provided with a filter, and the filter is used for filtering the received exhaust gas to filter particulate matters in the exhaust gas.
Preferably, the detection device is electrically connected with the control device through a wire or a wireless.
Preferably, when the control device monitors that the concentration of organic matters in the waste gas of the biological treatment device is smaller than a preset standard value through the detection device, the liquid pump device is controlled to pump the nutrient solution into the biological treatment device.
Preferably, the control device may calculate a moving average value T of the concentration of organic matter in the exhaust gas entering the biological treatment device in real timeAre all made ofAnd with TAre all made ofControlling the liquid according to the result of the comparison with a predetermined reference valueThe operating state of the pump device.
Preferably, the control device controls the supplement speed V of the nutrient solutionSupplement deviceThe following formula is satisfied,
wherein, TmaxIs a preset standard value of the concentration of the organic matter, β is a constant of 20-100 percent, LIntoThe air inlet quantity of the air inlet end of the biological treatment device in unit time; cNutritionIs the concentration of the nutrient solution; when T ismaxAnd TAre all made ofWhen the unit of (b) is ppm, α is a constant within 2.5-20, when T ismaxAnd TAre all made ofWhen the unit of (b) is mg/m3, α is a constant within 0.8-10.
Preferably, a liquid level sensor electrically connected with the control device is arranged in the nutrient solution storage container.
Preferably, the control device is further electrically connected with a remote communication module.
Preferably, the waste gas biological treatment device comprises a spray tower, a liquid collecting tank, an air inlet pipeline and an exhaust pipeline, wherein the air inlet pipeline and the exhaust pipeline are respectively arranged at an air inlet end and an exhaust end of the spray tower, the air inlet pipeline is used for inputting waste gas to be treated into the spray tower, the exhaust pipeline is used for outputting treated waste gas, and the detection device is communicated with the air inlet pipeline; a material mixing layer containing microorganisms is arranged in the spray tower, and the microorganisms are used for degrading organic matters in the waste gas; the liquid collecting pool is communicated with the bottom end of the spray tower through a communicating pipeline so as to collect liquid flowing out of the spray tower; the liquid collecting tank is communicated with the top of the spray tower through a circulating pipeline so as to spray the liquid in the liquid collecting tank into the batching layer; the liquid pump device comprises a water pump and a liquid conveying pipeline connected with the water pump, and the other end of the liquid conveying pipeline is communicated with the liquid collecting pool.
Drawings
Fig. 1 is a schematic structural diagram of a nutrient solution automatic compensation system in an embodiment of the invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
As shown in fig. 1, the present embodiment discloses an automatic nutrient solution compensation system for an exhaust gas biological treatment device, which includes a detection device 1, a control device 2, a nutrient solution storage container 3 and a liquid pump device 4.
One end of the detection device 1 is connected with the air inlet end of the biological treatment device 5, the other end is connected with the control device 2, and the detection device 1 is used for detecting the concentration of organic matters (TVOC) in the exhaust gas entering the biological treatment device 5. The nutrient solution storage container 3 is used for storing nutrient solution required by microorganisms in the biological treatment device 5. One end of the liquid pump device 4 is connected with the nutrient solution storage container 3, and the other end is connected with the biological treatment device 5, and is used for pumping the nutrient solution in the nutrient solution storage container 3 into the biological treatment device 5. The control device 2 is used for controlling the working state of the liquid pump device 4 according to the feedback of the detection device 1, namely when the detection device 1 detects that the concentration of organic matters entering the biological treatment device 5 is low, the control device 2 controls the liquid pump device 4 to be started, nutrient solution in the nutrient solution storage container 3 is supplemented into the biological treatment device 5 at a certain speed, so that the biological treatment device 5 can maintain a high-level microorganism concentration even in a low-concentration waste gas state, and the standard discharge of waste gas can be realized at any time. When the detection device 1 detects that the concentration of the organic matters entering the biological treatment device 5 is higher, the liquid pump device 4 is closed, and the nutrient solution is reasonably utilized.
As shown in fig. 1, the detection device 1 is provided with a filter 10, and the filter 10 is used for filtering the received exhaust gas to remove particulate matters therein. In this embodiment, through the setting of filter 10, can carry out filtration treatment to the waste gas that gets into detection device 1 to particulate matter such as dust wherein of filtering, make the testing result more accurate, can effectively prolong detection device 1's life simultaneously. Preferably, the detecting device 1 is electrically connected to the control device 2 through a wire or wirelessly. When the detection device 1 is connected to the control device 2 through a wired network, RS232 or RS485 interface standards can be preferred.
Preferably, a standard value representing the concentration of the organic matters in the exhaust gas is preset in the control device 2, the control device 2 compares the concentration of the organic matters in the exhaust gas currently entering the treatment device, which is fed back by the detection device 1, with the preset standard value, and when the detected current concentration of the organic matters is smaller than the preset standard value, the control device 2 controls the liquid pump device 4 to pump the nutrient solution into the biological treatment device 5.
In order to avoid the influence of frequent start-up of the liquid pump device 4 on the service life thereof, the control device 2 is further improved to calculate the moving average value T of the concentration of the organic matters in the exhaust gas entering the biological treatment device 5 in real timeAre all made ofFor example, a running average of the time periods of the last thirty, sixty or ninety minutes, for example, may be calculated and calculated as TAre all made ofThe result of the comparison with the preset standard value controls the operating state of the liquid pumping device 4, so that unnecessary frequent activation of the liquid pumping device 4 due to the influence of instantaneous individual detection data can be avoided.
After the liquid pump device 4 is started, if the nutrient solution replenishing speed is too slow, the concentration of microorganisms in the waste gas biological treatment device 5 is not ideal enough, and if the nutrient solution replenishing speed is too fast, the nutrient solution is wasted, so that the control device 2 controls the nutrient solution replenishing speed V through the liquid pump device 4Supplement deviceThe following formula is satisfied,
wherein, TmaxIs a preset standard value of the concentration of the organic matter, β is a constant of 20-100 percent, LIntoThe air intake volume of the air intake end of the biological treatment device 5 in unit time can be preset in the control device 2, and an air pressure sensor can be arranged at the air intake end of the biological treatment device 5 to detect the real-time air intake volume; cNutritionIs the concentration of the nutrient solution; when T ismaxAnd TAre all made ofWhen the unit of (b) is ppm, α is a constant within 2.5-20
(ii) a When T ismaxAnd TAre all made ofWhen the unit of (b) is mg/m3, α is a constant within 0.8-10 and is dimensionless.
Further, in order to enable the control device 2 to control the amount of the nutrient solution in the nutrient solution storage container 3 in real time, a liquid level sensor 30 electrically connected with the control device 2 is arranged in the nutrient solution storage container 3, and the liquid level sensor 30 in the embodiment is preferably an ultrasonic liquid level sensor. When the control device 2 detects that the liquid level in the nutrient solution storage container 3 is lower than the preset value through the liquid level sensor 30, the liquid pump device 4 can be stopped and alarm information can be sent. Preferably, the control device 2 is further electrically connected to a remote communication module 20, and the remote communication module 20 can remotely transmit data (including a level value in the nutrient solution storage container 3, a continuously moving average value of organic matter concentration at the air inlet of the exhaust gas biological treatment device 5, and a consumption amount of the nutrient solution, etc.) detected and calculated by the control device 2 to relevant personnel, and the remote communication module 20 in this embodiment can send a notification by means of a short message or an email.
In addition, the exhaust gas biological treatment apparatus 5 in the above embodiment includes the spray tower 50, the sump 51, the intake pipe 52, and the exhaust pipe 53. An air inlet pipeline 52 and an exhaust pipeline 53 are respectively arranged at the air inlet end and the exhaust end of the spray tower 50, the air inlet pipeline 52 is used for inputting exhaust gas to be processed into the spray tower 50, the exhaust pipeline 53 is used for outputting the processed exhaust gas, and the detection device 1 is communicated with the air inlet pipeline 52. A material mixing layer 54 containing microorganisms for degrading organic matters in the exhaust gas is arranged in the spray tower 50. The sump 51 communicates with the bottom end of the spray tower 50 through a communication pipe to collect the effluent liquid inside the spray tower 50. The sump 51 communicates with the top of the spray tower 50 through a circulation pipe 55 to spray the liquid in the sump 51 into the ingredient layer 54. The liquid pump device 4 comprises a water pump 40 and a liquid conveying pipeline 41 connected with the water pump 40, and the other end of the liquid conveying pipeline 41 is communicated with a liquid collecting pool 51. The working process of the biological waste gas treatment device 5 in the embodiment is as follows: waste gas containing odor and having machine enters the spray tower 50 from the air inlet pipeline 52, meanwhile, waste gas in the air inlet pipeline 52 enters the detection device 1, the detection device 1 detects the concentration of organic matters in the waste gas, and the detected value is fed back to the control device 2. After the exhaust gas enters the spray tower 50, the circulating pipe 55 continuously sprays liquid downwards, the exhaust gas is brought into the ingredient layer 54 below, so that the exhaust gas is degraded into water and carbon dioxide by microorganisms in the ingredient layer 54, the degraded carbon dioxide is discharged from the exhaust pipe 53, and the degraded water and the water sprayed by the circulating pipe flow into the liquid collecting tank 51 for recycling. When the control device 2 detects that the concentration of organic matters in the waste gas entering the spray tower 50 is lower than a preset standard value, the water pump 40 is started, the nutrient solution in the nutrient solution storage container 3 is input into the liquid collecting tank 51 through the liquid conveying pipeline 41, and then the nutrient solution is taken into the spray tower 50 by the circulating pipeline 55 and sprayed into the ingredient layer 54.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (9)
1. A nutrient solution automatic compensation system for a waste gas biological treatment device is characterized by comprising a detection device, a control device, a nutrient solution storage container and a liquid pump device;
one end of the detection device is connected with the air inlet end of the biological treatment device, the other end of the detection device is connected with the control device, and the detection device is used for detecting the concentration of organic matters in the waste gas entering the biological treatment device;
the nutrient solution storage container is used for storing nutrient solution required by microorganisms in the biological treatment device;
one end of the liquid pump device is connected with the nutrient solution storage container, and the other end of the liquid pump device is connected with the biological treatment device and is used for pumping nutrient solution in the nutrient solution storage container into the biological treatment device;
and the control device is used for controlling the working state of the liquid pump device according to the feedback of the detection device.
2. The nutrient solution automatic compensation system for the exhaust gas biological treatment device according to claim 1, wherein a filter is arranged on the detection device, and the filter is used for filtering the received exhaust gas to filter out particulate matters in the exhaust gas.
3. The nutrient solution automatic compensation system for an exhaust gas biological treatment device according to claim 1, wherein the detection device is electrically connected with the control device through a wire or a wireless.
4. The nutrient solution automatic compensation system for the waste gas biological treatment device according to claim 1, wherein when the control device monitors that the concentration of organic matters in the waste gas of the biological treatment device is less than a preset standard value through the detection device, the liquid pumping device is controlled to pump the nutrient solution into the biological treatment device.
5. The nutrient solution automatic compensation system for an exhaust gas biological treatment device according to claim 4, wherein the control device can calculate a moving average T of the concentration of organic matters in the exhaust gas entering the biological treatment device in real timeAre all made ofAnd with TAre all made ofAnd controlling the working state of the liquid pump device according to the comparison result with the preset standard value.
6. The nutrient solution automatic compensation system for an exhaust gas biological treatment device according to claim 5, wherein the control device controls a replenishment speed V of the nutrient solutionSupplement deviceThe following formula is satisfied,
wherein, TmaxIs a preset standard value of the concentration of the organic matter, β is a constant of 20-100 percent, LIntoIs the air inlet end of the biological treatment device in unit timeThe intake air volume of (2); cNutritionIs the concentration of the nutrient solution; when T ismaxAnd TAre all made ofWhen the unit of (b) is ppm, α is a constant within 2.5-20, when T ismaxAnd TAre all made ofWhen the unit of (b) is mg/m3, α is a constant within 0.8-10.
7. The nutrient solution automatic compensation system for exhaust gas biological treatment device according to claim 1, wherein a liquid level sensor electrically connected with the control device is arranged in the nutrient solution storage container.
8. The nutrient solution automatic compensation system for exhaust gas biological treatment device of claim 1, wherein the control device is further electrically connected with a remote communication module.
9. The nutrient solution automatic compensation system for the exhaust gas biological treatment device according to claim 1, wherein the exhaust gas biological treatment device comprises a spray tower, a liquid collecting tank, an air inlet pipeline and an exhaust pipeline, the air inlet pipeline and the exhaust pipeline are respectively arranged at an air inlet end and an exhaust end of the spray tower, the air inlet pipeline is used for inputting the exhaust gas to be treated into the spray tower, the exhaust pipeline is used for outputting the treated exhaust gas, and the detection device is communicated with the air inlet pipeline; a material mixing layer containing microorganisms is arranged in the spray tower, and the microorganisms are used for degrading organic matters in the waste gas; the liquid collecting pool is communicated with the bottom end of the spray tower through a communicating pipeline so as to collect liquid flowing out of the spray tower; the liquid collecting tank is communicated with the top of the spray tower through a circulating pipeline so as to spray the liquid in the liquid collecting tank into the batching layer; the liquid pump device comprises a water pump and a liquid conveying pipeline connected with the water pump, and the other end of the liquid conveying pipeline is communicated with the liquid collecting pool.
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