CN114797443A - Desulfurization and denitrification device based on biological bacteria - Google Patents
Desulfurization and denitrification device based on biological bacteria Download PDFInfo
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- CN114797443A CN114797443A CN202210331535.1A CN202210331535A CN114797443A CN 114797443 A CN114797443 A CN 114797443A CN 202210331535 A CN202210331535 A CN 202210331535A CN 114797443 A CN114797443 A CN 114797443A
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The invention relates to the field of industrial flue gas treatment, and particularly discloses a desulfurization and denitrification device based on biological bacteria, which comprises a biological trickling filter tower, a circulating pipeline and a water pump, wherein a packing layer loaded with a biological membrane is arranged in the biological trickling filter tower, the circulating pipeline is communicated with the upper part and the lower part of the biological trickling filter tower, and the circulating pipeline is communicated with the water pump, and the desulfurization and denitrification device comprises: elastic component, the nutrient solution supplies with the jar, the alkali lye supplies with the jar, iron filter screen and the removal push pedal of taking the entrance to a cave, the circulating line section of top of the tower top is wavy setting, one section wavy pipeline height of nearly suction pump is higher than other section wavy pipelines, alkali lye supplies with jar and nutrient solution and supplies with jar intercommunication circulating line, be located and be equipped with the boss on the pipeline inner wall of alkali lye supplies with jar junction, remove push pedal and circulating line inner wall sliding connection, remove the push pedal and receive liquid to strike the export that the entrance to a cave removed to spill alkali lye supplies with jar after, elastic component fixes at the boss and removes the push pedal between, the problem of unable all-weather continuous supply nutrient solution under the discontinuous production condition has been solved.
Description
Technical Field
The invention relates to the field of industrial flue gas treatment, in particular to a desulfurization and denitrification device based on biological bacteria.
Background
The coal combustion brings a large amount of SO2 and NOx, and seriously influences the health of human beings. The primary energy source of China is still mainly coal, 87% of SO2 and 67% of NOx are generated by the combustion of coal, and great threat is generated to the atmospheric environment. In recent years, the emission of SO2 and NOx is gradually reduced, but the total amount is still large, and the enhancement of the removal of SO2 and NOx in flue gas is still an important task. The desulfurization and denitrification integrated technology widely used at home and abroad at present mainly combines wet flue gas desulfurization and selective catalytic reduction or selective non-catalytic reduction denitration technology. The wet flue gas desulfurization usually adopts limestone (lime) -gypsum wet flue gas desulfurization, the desulfurization efficiency can reach 90 percent, and the wet flue gas desulfurization has the defects of huge engineering, high initial investment and operation cost and easy formation of secondary pollution. When the temperature of the selective catalytic reduction denitration reaction is 250-450 ℃, the denitration rate can reach 70% -90%. The technology is mature and reliable, is widely applied in the world, particularly developed countries at present, but the process equipment investment is large, the flue gas needs to be preheated, the catalyst is expensive and short in service life, and meanwhile, the problems of ammonia leakage, easy corrosion of equipment and the like exist. The selective non-catalytic reduction temperature area is 870-1200 ℃, and the denitration rate is less than 50%. The disadvantages are large investment of process equipment, need of preheating treatment of flue gas, easy corrosion of equipment and the like. And the process is complex, the cost is high, the operation difficulty is high, and the wide popularization and application are difficult.
For example, in the invention document with chinese patent publication No. CN103111184A, a device for simultaneously removing NOx, SO2, and PM2.5 includes a control system, a bio-trickling filter tower, and a microbial activity regenerator, wherein a filler layer for loading a biofilm is disposed in the bio-trickling filter tower, and a microbial nutrient solution is filled in the microbial activity regenerator; the bottom of the biological trickling filter tower is communicated with a microbial activity regenerator, the biological activity regenerator is communicated with the top of the biological trickling filter tower through a pump, and the top of the biological trickling filter tower is also provided with an exhaust port; the control system controls the flue gas to be sent to the bottom of the biological trickling filter and also controls the liquid in the microbial activity regenerator to be pumped to the top of the biological trickling filter.
This patent carries out SOx/NOx control through using the biological trickling filter to the flue gas and handles, and processing equipment is simple, and the cost is not high, and the energy consumption is low, and the working costs is low, and secondary pollution is few, has solved the various problems that current SOx/NOx control integration technique commonly used brought. However, the requirements of the microorganisms on the pH condition are different, the microorganisms can only grow within a certain pH value range, when the pH value is too low or too high, the denitration efficiency of the microorganisms is seriously influenced, and the pH value is very necessary to be controlled to be 7-8. And this patent is carrying out SOx/NOx control processing's in-process to the flue gas, and the microorganism absorbs sulfur dioxide and nitrogen oxide in the flue gas and can absorb constantly and generate sulphuric acid and nitric acid for the microorganism is acidity, and this can make the denitration efficiency of device reduce by a wide margin. In actual production, discontinuous production may occur, when the biological trickling filter in the patent stops operating, most of microorganisms in the biological trickling filter lose activity due to lack of nutrition during idle, the number of bacteria is reduced, after operation is resumed, the concentration of the microorganisms is not easily increased in a short time due to long generation period of nitrifying and denitrifying bacteria, and the denitration efficiency of the device during restart production is seriously influenced. In this case, when the operation is stopped due to a holiday or other reasons, the activity of the microorganism may be reduced. Therefore, a device is urgently needed to solve the problem that the nutrient solution can not be continuously supplied all day long under the condition of discontinuous production.
Disclosure of Invention
The invention provides a desulfurization and denitrification device based on biological bacteria, which aims to solve the problem that all-weather continuous nutrient solution supply cannot be realized under the condition of discontinuous production, and the application provides the following technical scheme:
the utility model provides a SOx/NOx control device based on biological fungus, includes biological trickling filter, circulating line and suction pump, be equipped with the packing layer of load biomembrane in the biological trickling filter, open the bottom of biological trickling filter has air inlet and liquid outlet, and open at the top has inlet tube mouth and gas vent, circulating line one end and liquid outlet fixed connection, the inlet tube mouth at the circulating line other end intercommunication biological trickling filter top, circulating line intercommunication suction pump, its characterized in that includes: an elastic element, a nutrient solution supply tank, an alkali liquor supply tank, an iron filter screen and a movable push plate with a hole, the iron filter screen is fixed on the inner wall of the circulating pipeline, the circulating pipeline section above the pipe inlet is arranged in a wavy shape, the height of the circulating pipeline at the wavy section is lower than the highest point of the circulating pipeline, the nutrient solution supply tank is fixed above one side of the highest point of the circulating pipeline close to the biological trickling filter, the alkali liquor supply tank is fixed below one side of the nutrient solution supply tank close to the biological trickling filter, the two tanks are communicated with the circulating pipeline, the side surfaces of the two tanks are provided with air holes, the inner wall of the circulating pipeline at the joint of the alkali liquor supply tank is provided with a lug boss, the movable push plate is connected with the inner wall of the circulating pipeline in a sliding mode, the movable push plate moves the hole to the outlet of the leaked alkali liquor supply tank after being impacted by liquid in the circulating pipeline, and the elastic piece is fixed between the boss and the movable push plate.
The basic scheme principle and the beneficial effects are as follows:
in the gas inlet entering biological trickling filter tower of flue gas bottom from biological trickling filter tower, because flue gas density is lower than the air, so the flue gas upwards passes through the packing layer from the bottom in the tower, is absorbed by the microorganism to reach the purpose to flue gas desulfurization denitration, the gas vent discharge at biological trickling filter tower top is followed to the flue gas after the purification. Because remove push pedal sliding connection on the slide rail on the circulating pipe inner wall, liquid in the circulating pipe can promote when being pumped to the top by the suction pump from biological trickling filter lower part, thereby make and remove the push pedal and remove the entrance to a cave after the liquid impact in receiving the circulating line to spill the export of alkali lye supply tank, because the elastic component is fixed in the middle of boss and removal push pedal, so when circulating line does not have liquid to continue to flow, the elastic component will resume original state, thereby will remove the push pedal and recover, realize the function of automatic switch alkali lye export.
Because the circulating pipeline section above the pipe inlet is arranged in a wavy shape, the height of the circulating pipeline of the wavy section is lower than the highest point of the circulating pipeline, the nutrient solution supply tank is fixed above one side of the highest point of the circulating pipeline close to the biological trickling filter, the alkali liquor supply tank is fixed below one side of the nutrient solution supply tank close to the biological trickling filter, both tanks are communicated with the circulating pipeline, so that the circulating liquid and the microorganisms in the circulating pipeline are fully mixed with the alkali liquor and the nutrient solution when passing through the section of pipeline, so that the microorganisms reach the optimal pH value state and the optimal nutrient state in the mixing stage, the desulfurization and denitrification efficiency of the device is improved, meanwhile, the special condition that liquid in the nutrient solution supply tank is used up and is not added with liquid is provided with help by the wavy arrangement, and nutrient solution in the circulating pipeline of the wavy section can still continuously provide nutrition for microorganisms in the biological trickling filtration tower.
Because the nutrient solution supply tank is fixed above one side of the highest point of the circulating pipeline, which is close to the biological trickling filter, and is communicated with the circulating pipeline, enough nutrient solution in the nutrient solution supply tank can continuously and dropwise add the nutrient solution into the biological trickling filter without external force.
Because the side of two kinds of jars all is opened there is the gas pocket, the side of jar is opened there is the gas pocket, according to venturi effect, near fluid that flows at a high speed can produce the low pressure, thereby produce the adsorption, so the liquid velocity of flow of the exit of nutrient solution feed tank and alkali lye feed tank that communicate circulating line can change because of the liquid velocity of flow change in the circulating line, when the flue gas lets in the volume is big, the liquid that the pump extracted is more, the liquid velocity of flow in the circulating line increases, the feed rate of nutrient solution and alkali lye also increases, strengthen the activity of microorganism, avoid the environment that the microorganism is located sharply to become sour, reduce the efficiency of denitration.
Because fixed iron filter screen in the middle of the circulating line, so the iron filter screen can handle dust and impurity in the liquid in the tower, avoids the impurity of taking out in the follow-up suction pump to influence life more, and simultaneously, the iron filter screen can also handle flue gas sulphide and nitrogen oxide and dissolve in sulphuric acid and the nitric acid that water generated for the liquid of taking out to biological trickling filter tower top is always neutral, is convenient for control the concentration and the pH value of top lye.
Furthermore, the device also comprises an oxygen supply device which is fixedly connected with the front end of the air inlet at the bottom of the bio-trickling filter.
The oxygen supply device can oxidize NO in the flue gas, so that NO which is not dissolved in water is oxidized into NOx which is dissolved in water.
Further, the cyclone separator is fixedly connected to the front end of the air inlet of the oxygen supply device.
The cyclone separation device can clean large particles and dust in the flue gas.
Further, the iron filter screen comprises a liquid storage tank which is fixedly connected behind the iron filter screen segment and is provided with a gas collecting port.
The excessive liquid accumulated in the storage tower collects hydrogen and nitric oxide generated by the reaction of the filter screen and a small part of acid flowing out of the bottom of the bio-trickling filter.
Furthermore, the device also comprises a spray head fixedly connected with the opening end of the circulating pipeline passing through the inlet pipe opening.
The contact effect of nutrient solution and alkali lye and packing layer is increased, denitration efficiency is improved.
Further, the lye supply tank is filled with NH4HCO3 solution.
The NH4HCO3 aqueous solution is alkaline, the pH value of 0.1 mol.L < -1 > solution is 7.8 at 25 ℃, the environment with pH value of 7-8 required by microorganisms is fully adapted, and the situation that the pH value of the environment of the microorganisms is too high when the NH4HCO3 aqueous solution is excessively supplied is also avoided.
Furthermore, a screen is fixedly arranged at the air hole of the alkali liquor supply tank.
Preventing dust from entering the tank.
Furthermore, a screen is fixedly arranged at the air hole of the nutrient solution supply tank.
Preventing dust from entering the tank.
Furthermore, steel balls are arranged at the upper end of the outlet of the nutrient solution supply tank.
The outflow speed of the nutrient solution is slowed down, so that the nutrient solution can be provided for the microorganisms for a long time when the production is discontinuous.
Furthermore, the device also comprises a pressed plate fixed on the side surface of the movable push plate.
The contact surface of increase and liquid promotes the pressurized effect, is convenient for promote the slip that removes the push pedal.
Drawings
FIG. 1 is a partial sectional view of a front view of a biological bacteria-based desulfurization and denitrification apparatus;
fig. 2 is a partial sectional view of a front view of the biological bacteria-based desulfurization and denitrification apparatus at a.
Detailed Description
The following is further detailed by way of specific embodiments:
the reference numbers in the drawings of the specification include: iron filter screen 1, liquid storage pot 2, suction pump 3, circulating line 4, removal push pedal 5, pressed plate 6, alkali lye supply tank 7, spring 8, boss 9, nutrient solution supply tank 10, shower nozzle 11, biological trickling filter 12, cyclone 13, oxygen supply apparatus 14.
Examples are shown in fig. 1 and 2:
this embodiment is desulfurization denitrification facility based on biological fungus, includes:
flue gas dust removal purifier, flue gas dust removal purifier include cyclone 13, apparatus of oxygen supply 14 and bio-trickling filter 12, and apparatus of oxygen supply 14 adopts the venturi to supply oxygen pipe, and it has flue gas import and liquid outlet to open bio-trickling filter 12 below, and it has the gas vent and advances the mouth of a pipe to open the top, and inside is equipped with the packing layer of load biomembrane. The oxygen supply device 14 is in threaded connection between the outlet of the cyclone separator 13 and the inlet of the biological trickling filter 12, and two ends of the oxygen supply device are respectively connected with the outlet of the cyclone separator 13 and the inlet of the biological trickling filter 12.
The unpurified flue gas firstly enters the cyclone separator 13, the cyclone separator 13 is tangentially led by airflow to cause rotary motion, so that solid particles with larger inertial centrifugal force are thrown to the outer wall surface to be separated, thereby playing a good separation effect on large smoke particles, and the flue gas after dust removal advances along the gas outlet of the cyclone separator 13. The NO in the flue gas has low solubility in water, only the part of NO dissolved in water and directly diffused to the biomembrane can be absorbed and degraded by the microorganism, most of NO is mainly directly absorbed by the biomembrane and captured and degraded by the microorganism, when the concentration of NO is higher, the adsorption effect of the biomembrane is reduced, so that the degradation efficiency is reduced, therefore, the oxygen supply device 14 is arranged at the front section of the bottom air inlet of the biotrickling filter 12, and after the flue gas passes through the oxygen supply device 14, the NO is converted into NOx dissolved in water. The flue gas of preliminary dust removal oxygen suppliment gets into biological trickling filter 12 in from the flue gas import, begins to rise, and the in-process that rises contacts with moist biomembrane and reaches SOx/NOx control's effect, and the gas after SOx/NOx control is discharged from the gas outlet at the top of biological trickling filter 12 tower.
The circulating supply device comprises a water suction pump 3, a circulating pipeline 4, a movable push plate 5, a pressure receiving plate 6, an alkali liquor supply tank 7, a spring 8, a boss 9 and a spray head 11. In the research of the experiment of simultaneous desulfurization and denitrification by biological methods at the 9 th volume of the 3 rd volume of the 10 th month of 2009, according to the data of the experiment on the influence of pH on the desulfurization and denitrification of flue gas, the pH is not favorable for removing nitric oxide when too low or too high, and the pH value is very necessary to be controlled between 7 and 8, NOx and SO2 in the flue gas are easily dissolved in water to generate sulfuric acid, nitric acid and the like to reduce the pH value of microorganisms in a packing layer, SO as to reduce the activity of the microorganisms and influence the denitrification efficiency, therefore, a tank body of an alkali liquor supply tank 7 is fixed above a wavy section of a circulating pipeline 4, an outlet of the alkali liquor supply tank 7 is communicated with the circulating pipeline 4, the side surface of the alkali liquor supply tank 7 is provided with air holes, a boss is arranged on the inner wall of the circulating pipeline 4 at the connection position of an outlet of the alkali liquor supply tank 7, a slide rail is arranged on the inner wall of the circulating pipeline 4, a movable push plate 5 is connected with the slide rail in a sliding way, a pressed plate 6 is connected with the side surface of the movable push plate 5 by screws, the spring 8 is fixed between the boss 9 and the moving push plate 5.
When the circulating device starts to operate, the water pump 3 pumps liquid, the liquid moves upwards along the circulating pipeline 4, the liquid impacts the pressure receiving plate 6 to push the moving push plate 5 to slide forwards, the moving push plate 5 moves the hole to the outlet of the alkali liquor leaking supply tank 7 after being impacted by the liquid in the circulating pipeline 4, the alkali liquor supply tank 7 starts to output liquid, NH4HCO3 solution is placed in the alkali liquor supply tank 7, the pH =7.8 of the NH4HCO3 solution with the concentration of 0.1mol/L at normal temperature can be used for providing a large amount of alkali liquor, an environment with the pH value controlled between 7 and 8 is provided for microorganisms, the situation that the pH value of the environment where the microorganisms are located is too high under the situation that the generated acid cannot neutralize the alkali liquor in the alkali liquor supply tank 7 at normal temperature is avoided, the situation that the outlet of the alkali liquor supply tank 7 is narrow to reduce the liquid output speed when the input amount of the flue gas is large, more sulfide and nitrogen oxide are brought in, more acidic liquid is generated, the water pumping amount of a water pump 3 of the circulating supply device is increased at the moment, the flow rate of liquid in a circulating pipeline 4 is increased, the flow rate of the limited flow is increased when the limited flow passes through a reduced flow cross section, and the flow rate is inversely proportional to the flow cross section, so that the liquid outlet speed of the NH4HCO3 solution is increased along with the increase of the flow rate of the circulating pipeline 4, the solution is sprayed onto a filler from the top of the tower and flows from top to bottom in the filler layer, and the environment with the pH value of 7 to 8 is better provided for microorganisms. One end of the circulating pipeline 4 is in threaded connection with a liquid outlet below the biological trickling filter 12, the other end of the circulating pipeline is communicated with a pipe inlet of the biological trickling filter 12, and the nozzle 11 is in threaded connection with the pipe orifice of the circulating pipeline 4 below the pipe inlet in the biological trickling filter 12. 4 sections of circulating line of department are wavy above biotrickling filter 12, and the length that the wave section set up is 50 meters, and the circulating liquid and the microorganism of drippage in the biotrickling filter 12 of being convenient for mix alkali lye and nutrient solution fully when pipeline through this section, make the microorganism just reach best pH value state and nutritive state in the stage before falling to shower nozzle 11 and evenly falling entering biotrickling filter 12, and this can promote the SOx/NOx control efficiency of this device undoubtedly. Set up the device of warning in the nutrient solution supply tank 10, after the nutrient solution reachd the water level of warning, begin to send out the police dispatch newspaper, remind the user in time to add the nutrient solution, wave section circulating line 4 set up to the nutrient solution and exhausted the condition that has not yet provided help, and nutrient solution in the wave section circulating line 4 still can continue to provide nutrition for the microorganism in biological trickling filtration tower 12, avoids the microbial activity to reduce. In order to improve the mixing effect of the section of the circulating pipeline 4, the section of the circulating pipeline 4 is arranged in a spiral shape, so that the mixing efficiency of the microorganisms and the circulating liquid with the lye and the nutrient solution is better.
The all-weather supply device comprises a nutrient solution supply tank 10, a liquid storage tank 2 and an iron filter screen 1. The nutrient solution supply tank 10 can contain 1000L of liquid, and a plurality of steel balls with through holes inside and larger than the diameter of an outlet are placed at the upper end of the outlet of the nutrient solution supply tank 10, so that the liquid outlet speed of the nutrient solution supply tank 10 can be controlled conveniently, and the device can still continuously provide sufficient nutrient solution for microorganisms when in shutdown. The side that the nutrient solution supplies with jar 10 and is close to the top is opened on and is had the vent, carry out the liquid feeding through this vent during the liquid feeding, be provided with quick detachable screen cloth in the vent, the screen cloth can completely cut off outside dust, the export of nutrient solution supplies with jar 10 is narrow and small in order to reduce out liquid speed, when the flue gas admission capacity is big, bring into more sulphide and nitrogen oxide, the material of microbiological treatment is also more, the suction pump 3 of circulation feeding device at this moment draws water the volume increase, the liquid velocity of flow accelerates in circulating pipe 4, restricted flow is when overflowing the section through reducing, the phenomenon of velocity of flow increase appears in the fluid, its velocity of flow is inversely proportional with overflowing the section, consequently, the play liquid speed of nutrient solution can accelerate thereupon because of the velocity of circulating pipe 4's velocity of flow, spray downwards to the filler from the top of the tower, top-down flows in the packing layer.
Liquid in the biotrickling filter 12 flows down along the liquid outlet of biotrickling filter 12 below, get into circulating line 4, through iron filter screen 1, iron filter screen 1 has sieved remaining a small amount of dust and particulate matter in the biotrickling filter 12, when having avoided at follow-up suction pump 3 to extract liquid up the top of the tower and getting into, dust and particulate matter in the liquid block up suction pump 3, influence the life of suction pump 3, iron filter screen 1 is when sieving remaining dust, also can react with remaining acid in the tower, the effect that reduces alkali lye consumption has also been realized, liquid behind iron filter screen 1 gets into liquid storage pot 2, a small amount of gas that iron and acid reaction generated goes out through the gas collection mouth of liquid storage pot 2 and is collected, liquid is extracted by suction pump 3 toward the top of the biotrickling filter 12.
Because the section of the circulating pipeline 4 above the pipe inlet is arranged in a wavy manner, and the height of the section of the wavy pipeline close to the water pump 3 is higher than that of other sections of wavy pipelines, enough nutrient solution in the nutrient solution supply tank 10 can continuously and dropwise add the nutrient solution into the bio-trickling filter 12 without external force, compared with the traditional method that the water pump 3 extracts the nutrient solution to irrigate microorganisms, the invention well avoids the situation that the activity of the microorganisms is reduced due to halt under the condition of discontinuous production, so that the microorganisms need to be supplied with nutrients for ten days when the device is restarted.
The above are merely examples of the present invention, and the present invention is not limited to the field related to this embodiment, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art can know all the common technical knowledge in the technical field before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the scheme, and some typical known structures or known methods should not become barriers to the implementation of the present invention by those skilled in the art in light of the teaching provided in the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. The utility model provides a SOx/NOx control device based on biological fungus, includes biological trickling filter, circulating line and suction pump, be equipped with the packing layer of load biomembrane in the biological trickling filter, open the bottom of biological trickling filter has air inlet and liquid outlet, and open at the top has inlet tube mouth and gas vent, circulating line one end and liquid outlet fixed connection, the inlet tube mouth at the circulating line other end intercommunication biological trickling filter top, circulating line intercommunication suction pump, its characterized in that includes: an elastic element, a nutrient solution supply tank, an alkali liquor supply tank, an iron filter screen and a movable push plate with a hole, the iron filter screen is fixed on the inner wall of the circulating pipeline, the circulating pipeline section above the pipe inlet is arranged in a wavy shape, the height of the circulating pipeline at the wavy section is lower than the highest point of the circulating pipeline, the nutrient solution supply tank is fixed above one side of the highest point of the circulating pipeline close to the biological trickling filter, the alkali liquor supply tank is fixed below one side of the nutrient solution supply tank close to the biological trickling filter, the two tanks are communicated with the circulating pipeline, the side surfaces of the two tanks are provided with air holes, the inner wall of the circulating pipeline at the joint of the alkali liquor supply tank is provided with a lug boss, the movable push plate is connected with the inner wall of the circulating pipeline in a sliding mode, the movable push plate moves the hole to the outlet of the leaked alkali liquor supply tank after being impacted by liquid in the circulating pipeline, and the elastic piece is fixed between the boss and the movable push plate.
2. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: still include the oxygen suppliment device of the air inlet front end of fixed connection in biological trickling filter bottom.
3. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: also comprises a cyclone separation device fixedly connected at the front end of the air inlet of the oxygen supply device.
4. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: the iron filter screen also comprises a liquid storage tank which is fixedly connected behind the iron filter screen segment and is provided with a gas collecting port.
5. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: also comprises a spray head fixedly connected with the opening end of the circulating pipeline passing through the inlet pipe opening.
6. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: the alkali liquor supply tank is filled with NH4HCO3 solution.
7. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: and a screen is fixedly arranged at the air hole of the alkali liquor supply tank.
8. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: and a screen is fixedly arranged at the air hole of the nutrient solution supply tank.
9. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: the device also comprises a plurality of steel balls with through holes inside, wherein the steel balls are placed inside the nutrient solution supply tank, and the diameter of each steel ball is larger than the distance of the outlet of the nutrient solution supply tank.
10. The desulfurization and denitrification facility based on biological bacteria according to claim 1, wherein: the device also comprises a pressed plate fixed on the side surface of the movable push plate.
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Citations (8)
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| CN114797443B (en) | 2023-04-18 |
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