CN106975311A - Flue gas subtracts carbon both culturing microalgae system and flue gas processing method except haze - Google Patents

Abstract

The invention discloses a culture flue gas haze removal and carbon reduction microalgae cultivation system. The system includes a cyclone dust collector, a spray washing tower, VOCs processing equipment, a trachea and a closed algae bucket connected in sequence, and can filter and remove dust in the flue gas. Inorganic waste gases such as particles, sulfur dioxide and nitrogen oxides, as well as various organic waste gases, and carbon dioxide gas is used for microalgae cultivation. The flue gas haze removal and carbon reduction microalgae cultivation system provided by the present invention and the flue gas treatment method used in the system not only effectively purify industrial flue gas, but also avoid and reduce the fog that may be caused by flue gas pollution. Haze and greenhouse effect problems, and carbon dioxide is extracted from the flue gas for microalgae cultivation to generate economic benefits; in addition, the present invention also realizes closed microalgae cultivation, which reduces the impact of changes in the open air environment on the growth of microalgae Influence, stabilize and improve the efficiency of microalgae cultivation.

Description

Flue gas haze removal and carbon reduction microalgae culture system and flue gas treatment method

technical field

The invention relates to the technical field of environmental protection, in particular to an equipment method for treating flue gas by using microalgae.

Background technique

With the rapid development of industrial technology, the emission of industrial smoke is also increasing rapidly, resulting in increasingly serious environmental pollution, which has affected the entire ecological circle of the earth. Industrial flue gas, also known as industrial waste gas, its main components include: various dust and soot, heavy metal compounds such as lead and mercury sulfate, carbides such as carbon monoxide and carbon dioxide, sulfides such as sulfur dioxide, carbon disulfide and hydrogen sulfide, and various nitrogen oxides Wait. These substances enter the human body through the respiratory tract in different ways, some directly cause harm, and some have a cumulative effect, which will seriously endanger human health. Among them, dust, smoke and heavy metal compounds may also cause smog after years of accumulation, greatly expanding the scope of their harm.

As the most common exhaust gas, carbon dioxide often occupies a large proportion of industrial flue gas components, and excessive carbon dioxide emissions will aggravate the greenhouse effect, cause environmental degradation, and seriously affect the ecological balance. Therefore, limiting the emission of carbon dioxide and stabilizing the content of carbon dioxide in the atmosphere is of great significance to environmental protection.

Since plants can perform photosynthesis, absorb carbon dioxide in the air and release oxygen, planting plants, afforestation and other methods can effectively reduce the content of carbon dioxide. But on the one hand, planting ordinary trees and other plants needs to occupy a large land area, and it is difficult to realize large-scale tree planting in places such as cities with serious carbon dioxide emissions; on the other hand, the planting and maintenance of plants are often cumbersome, but they can The benefit of direct harvest is very little, and the economy is low. Considering all aspects, algae cultivation technology has gradually become an emerging industry due to its high environmental protection and high economic efficiency, and has made great contributions to solving the problem of excessive carbon dioxide emissions.

Existing algae cultivation techniques are all based on open-air cultivation. However, the existing algae cultures are cultivated in the open air, and it is not easy to classify and harvest them. There are strong adult plants, weak plants with diseases and insect pests, gradually aging old plants and other algae. The seedlings that have not yet grown not only cannot obtain the required adult microalgae, but also many of them are too old, diseased or too young to affect the efficiency of subsequent production operations. In addition, open-air cultivation will also be affected by weather factors such as the rainy season, which will cause the nutrients to be diluted and diluted, resulting in insufficient growth nutrients. If the temperature difference between the weather is too large, such as too cold or too hot, it will cause damage to the growth of algae.

Contents of the invention

In order to solve the problems that the above-mentioned flue gas pollutes the environment and causes and aggravates smog and the greenhouse effect, and algae open-air cultivation is affected by environmental changes, the present invention provides a system for flue gas haze removal and carbon reduction microalgae cultivation, and the system used for the system Flue gas treatment methods.

The flue gas haze removal and carbon reduction microalgae cultivation system includes sequentially connected cyclone dust collectors, spray scrubbers, VOCs treatment equipment, air pipes and algae barrels and other components.

The cyclone dust collector performs gas-solid separation of the flue gas discharged from the chimney to remove large particle dust in the flue gas, and the dust-removed flue gas is input into the spray washing tower.

The spray washing tower sprays and washes the dedusted flue gas to remove fine dust particles and acid gases such as sulfide and nitrogen oxides in the flue gas, and the washed flue gas is input into the VOCs treatment equipment.

The VOCs processing equipment has an atomization oxygenation system and a nano-microbubble system, which can process the flue gas after spraying and washing with superoxide nano-microbubble technology, decompose the organic waste gas, and input the treated gas into the in the trachea. The treated gas is mainly CO2 gas, and may contain a small amount of SO2, CO, NO, NO2 and other nitrogen oxides, among which the volume concentration of CO2 gas is 3% to 20%.

The air pipe can divide the gas and/or pressurize it, and output it into the algae tank according to the demand. The algal bucket is closed, and microalgae are cultivated inside it, generally blue algae or green algae or chlorella, for photosynthesis and absorption of gas output from the trachea.

A light source device, an aeration device and a stirring device are provided inside the algae barrel, wherein the aeration device and the jet tube are both connected to the air pipe.

The light source device includes a plurality of vertical LED lamp posts, and the top of each LED lamp post is equipped with a power supply, wherein the light emitted by the LED lamp posts is generally a combination of red and blue light, and the spectrum is 500-800nm. Thus, the necessary light conditions can be provided for the photosynthesis of microalgae.

The aeration device comprises a plurality of aeration pans placed at the bottom of the algae bucket and an aeration conduit connected to each aeration pan, and the aeration conduit is connected with the air pipe. Thus, tiny bubbles can be formed to provide the necessary gas for the photosynthesis of microalgae.

The stirring device includes a plurality of jet tubes, the jet tubes have liquid outlet pipes that are vertically arranged and have upper and lower ends opening in the same direction, and one end communicates with the middle section of the liquid outlet pipe and the other end communicates with the air pipe intake pipe. A horizontal extension pipe is installed at the upper and lower ports of the outlet pipe. Thereby, a stirring effect can be produced, the contact probability between the air bubbles and the microalgae can be increased, and the photosynthesis efficiency of the microalgae can be improved.

The flue gas haze removal and carbon reduction microalgae cultivation system provided by the present invention and the flue gas treatment method used in the system can filter and remove inorganic waste gases such as dust particles, sulfur dioxide and nitrogen oxides, and various organic waste gases in the flue gas to obtain Carbon dioxide gas and used for microalgae cultivation. The system and method not only effectively purify the flue gas, avoid and alleviate the problems of smog and greenhouse effect that may be caused by the flue gas polluting the environment, but also extract carbon dioxide from the flue gas for microalgae cultivation to produce economic benefits. In addition, the present invention also realizes closed microalgae cultivation, reduces the influence of open-air environment changes on the growth of microalgae, and stabilizes and improves the cultivation efficiency of microalgae.

Description of drawings

Fig. 1 is the flow chart of the microalgae cultivation system of flue gas dehaze and carbon reduction of the present invention;

Fig. 2 is the structural representation of cyclone dust collector of the present invention;

Fig. 3 is the structural representation of spray washing tower of the present invention;

Fig. 4 is the working principle figure of VOCs processing equipment of the present invention;

Fig. 5 is the structural representation of VOCs processing equipment of the present invention;

Figure 6 is a partial sectional view of the algae barrel of the present invention;

Fig. 7 is a top view of the distribution of jet tubes in Fig. 6 .

In the figure: cyclone dust collector 1, spray scrubber 2, VOCs equipment 3, air pipe 4, algae bucket 5;

Intake pipe 11, cylinder body 12, cone 13, ash outlet 14, recirculation zone 15, exhaust pipe 16, outer swirl air flow 17, inner swirl air flow 18, secondary flow 19;

Washing liquid inlet 21, nozzle 22, gas inlet 23, sewage outlet 24, water supply port 25, circulation pump 26, circulating water inlet 27, demister 28, gas outlet 29;

Sand filter and water circulation system 31, air inlet 32, atomization oxygenation system 33, nano microbubble system 34, reaction tank 35, axial flow fan 36, air outlet 37, detection port 38, PLC control system 39, auxiliary water tank 311 , circulation pump 312, slag outlet 313, low pressure pump 331, negative ion low pressure pipeline system 332, negative ion generator 333, high pressure pump 341, microbubble high pressure pipeline system 342, microbubble generator 343;

Barrel cover 51, LED lamp post 52, power supply 53, aeration disc 54, aeration conduit 55, jet pipe 56, liquid outlet pipe 561, air inlet pipe 562, extension pipe 563.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 schematically shows the flow chart of the microalgae cultivation system for gas removal, haze reduction and carbon reduction according to the present invention. As shown in the figure, the flue gas haze removal and carbon reduction microalgae cultivation system includes sequentially connected cyclone dust collectors, spray scrubbers, VOCs treatment equipment, air pipes and algae barrels and other components. The industrial flue gas discharged from the chimney of the factory passes through the cyclone dust collector, spray scrubber and VOCs treatment equipment in sequence to remove various dust, smoke and acid gas and other pollutants, and the remaining CO2 gas is input into the algae tank through the trachea In it, it is used to supply microalgae to carry out photosynthesis, produce and output fresh oxygen. In addition, the soot in the cyclone dust collector and the algae mud in the algae tank can be mixed to make organic fertilizer and be used, and the cleaning water in the algae tank can also be recycled into the spray scrubber for spraying after filtration, realizing Recycling.

Fig. 2 shows a schematic structural view of the cyclone dust collector of the flue gas haze removal and carbon reduction microalgae cultivation system according to the present invention. The cyclone dust collector is a commonly used dust removal device in industry. Its principle is that when the dust-laden airflow enters the dust collector, it rotates in the dust collector, and the dust in the airflow moves to the outer wall under the action of centrifugal force, reaches the wall surface, and Under the action of airflow and gravity, it falls along the wall to the bottom to achieve the purpose of separation.

As shown in the figure, the flue gas enters the cylinder 12 from the intake pipe 11, and rotates with the rotation of the cylinder 12, and most of it spirals along the wall from the cylinder from top to bottom to the bottom of the cone. Movement, forming a descending external swirling airflow 17, the centrifugal force generated during the rotation will throw the dust particles whose density is much greater than that of the gas to the wall of the device. And self gravity falls along the wall surface of cone 13 and from ash discharge port 14. After reaching the recirculation zone 15 at the bottom of the cone 13, the external swirling airflow 17 turns upward along the axis of the dust collector to form a rising internal swirling airflow 18, which is discharged from the exhaust pipe 16 of the dust collector.

Another small part of the airflow of the external swirling airflow 17 flows upward and then flows downward along the outside of the exhaust pipe 16. When it reaches the lower end of the exhaust pipe 16, it reverses upwards to form a secondary flow 19, and with the rising The central airflow is discharged from the exhaust pipe together, and the dust particles dispersed in it are also taken away together.

The cyclone dust collector separates the flue gas from the chimney from gas to solid, and removes large particles of dust in the flue gas, generally various dust and smoke above 5-15 microns, including heavy metal compounds such as lead and mercury sulfate. After dust removal, the flue gas is input into the spray scrubber.

Fig. 3 shows a schematic structural view of the spray scrubber of the flue gas haze removal and carbon reduction microalgae culture system according to the present invention. As shown in the figure, the spray washing tower 2 is a kind of wet dust removal equipment. Its principle is to input the washing liquid from the washing liquid inlet 21, and atomize it into fine droplets through the nozzle 22 to spray downwards evenly, and the containing Dust gas enters from the gas inlet 23 at the lower part of the spray tower and flows from bottom to top, and contacts with the washing liquid countercurrently, and uses the contact and collision between dust particles and water droplets to condense each other or reunite between dust particles, so that its weight is greatly increased. effect and sink down. The collected dust settles by gravity in the liquid storage tank to form a high-solid dense phase liquid at the bottom, which is regularly discharged through the sewage outlet 24 for further treatment, and part of the clarified liquid can be used together with the supplemented clear liquid input from the water supply port 25 The circulation pump 26 is passed into the spray washing tower 2 from the circulating water inlet 27 to perform spray washing to realize recycling, thereby reducing the consumption of liquid and the treatment amount of secondary sewage. The purified gas after spraying and washing is output from the gas outlet 29 at the top of the tower after the fine liquid droplets entrained by the gas are removed by the demister 28 .

In the present invention, the flue gas after dedusting is sprayed and washed by the spray washing tower, which can remove fine dust particles below 5 microns in the flue gas, and adopts alkaline washing liquid to neutralize most of the acid gases in the flue gas, mainly They are sulfides such as SO2 and some nitrogen oxides including NO and NO2, but generally speaking, these acid gases are difficult to be completely cleared, and there will still be a small amount. The washed flue gas is mainly composed of organic waste gas and CO2, and is input into the VOCs treatment equipment.

Fig. 4 shows the working principle diagram of the VOCs processing equipment of the flue gas haze removal and carbon reduction microalgae culture system according to the present invention. VOCs, which means volatile organic compounds, are generally called organic waste gas, and are also one of the main components of washed flue gas. VOCs treatment equipment is an industrial equipment used to decompose and treat organic waste gas. For the treatment of organic waste gas, the existing common technologies mainly include thermal destruction method, liquid absorption method, activated carbon adsorption method, low temperature condensation method, biological conversion method and photocatalytic oxidation method, etc. As shown in the figure, the VOCs treatment equipment in the present invention degrades the organic waste gas in the flue gas through the atomization oxygenation system and the nano-microbubble system in turn, and discharges the treated substances through the axial flow fan. The entire treatment and discharge process is controlled by a PLC control system. In addition, in the process of treatment, the external water source of tap water is treated through the sand filter and water circulation system, and then passed into the atomization aeration system and the nano micro-bubble system to maintain sufficient water flow. The sand filter and water circulation system will discharge some organic matter. Exhaust gas and paint mist decomposition residues and a small amount of waste water.

It can be seen that what the present invention uses to treat flue gas is a method of degrading organic waste gas by using an atomization oxygenation system and a nano-micro-bubble drop system, and its core technology is super-oxygen nano-micro-bubble technology.

Nano-microbubbles are bubbles with a diameter of about 10 microns to hundreds of nanometers when they occur. This kind of bubbles is between micro-bubbles and nano-bubbles, and has physical and chemical properties that conventional bubbles do not have, such as surface charge , easy to generate a large number of free radicals, high mass transfer efficiency and high gas dissolution rate. The principle of nano-microbubbles to degrade organic waste gas is to use nano-microbubble generators to generate nano-scale microbubbles. Due to the cavitation effect, the nano-microbubbles will collapse in a very short time (about ^10-9 seconds), generate a large amount of heat (about 4000k) and extremely high pressure (about 1800atm) instantaneously, and release a large amount of hydroxyl, Free radicals, etc., undergo physical and chemical reactions with captured organic gases such as mechanical shearing, pyrolysis, free radical oxidation, supercritical water oxidation, etc., to decompose and remove organic gases.

Compared with other commonly used organic waste gas treatment methods, super oxygen nano-microbubble technology can be used for various concentrations of organic waste gas, without pretreatment, simple operation, low operation and construction costs, short construction period, small footprint and No secondary pollution and many other advantages.

Fig. 5 shows a schematic structural diagram of the VOCs treatment equipment of the flue gas haze removal and carbon reduction microalgae culture system according to the present invention. As shown in the figure, the VOCs treatment equipment 3 includes a flue gas treatment channel, a sand filter and a water circulation system 31, and an air inlet 32 connected to the bottom of the flue gas treatment channel. Oxygen system 33, nano-microbubble system 34 and reaction tank 35, reaction tank 35 can be provided with two up and down and communicated by axial flow fan, the top of flue gas treatment passage is provided with air outlet 37, near the place near air outlet 37 also is provided with There is a detection port 38 . The sand filtration and water circulation system 31 includes an auxiliary water tank 311 and a circulation pump 312 communicating with the auxiliary water tank 311 . The atomization oxygenation system 33 includes a low-pressure pump 331, an anion low-pressure piping system 332, and an anion generator 333 connected to one end of the anion low-pressure piping system 332. The anion generator 333 is located inside the flue gas treatment channel. The nano-micro-bubble system 34 includes multiple sets of high-pressure pumps 341 , micro-bubble high-pressure piping system 342 and a micro-bubble generator 343 , wherein the micro-bubble generator 343 is located inside the flue gas treatment channel and above the anion generator 333 . Water flows from the water source into the sand filter and water circulation system 31, wherein the sand filter and water circulation system 31 passes the water into the auxiliary water tank 311 for equipment use after the water is purified, and the purified impurities can use the circulation pump 312 Circular purification treatment is carried out, and finally some organic waste gas and paint mist decomposition residues and a small amount of waste water are discharged from the slag discharge port 313 .

The flue gas to be treated enters the equipment from the air inlet 32, and is firstly treated by the atomization oxygenation system 33 to become a gas-liquid mixture, and then enters the nano-microbubble system 34 for degradation. The whole process uses The technology can be called superoxide nano-microbubble technology. Among them, the atomization oxygenation system 33 is used to create a super oxygen environment, and the nano-microbubble system 34 is used to produce microbubbles, and the specific reaction is carried out in the reaction tank 35 .

The organic waste gas in the flue gas treated by the super-oxygen nano-microbubble technology is now degraded into CO2 gas and moisture, and the treated gas can be discharged from the air outlet 37 by using the axial flow fan 36, or can be discharged at the air outlet 37. A detection port 38 is provided to allow part of the gas to be discharged from the detection port 38 to detect the treatment effect.

The work and reaction process of all systems in the VOCs processing equipment 3 are carried out under the control of the PLC control system 39 , and the gas discharged from the air outlet 37 is transported into the air pipe 4 . The gas composition at this time is mainly CO2 gas, its volume concentration is 3% to 20%, and the content of other impurity gases is extremely low. The trachea 4 can receive the gas input from the VOCs treatment equipment, and continue to transport the gas to the algae tank 5. The microalgae in the algae tank 5 can absorb a large amount of CO2 for photosynthesis and form nutrients necessary for the growth of the microalgae.

The algae bucket 5 needs to receive gas from multiple different locations, and often different locations need to receive gas at different flow rates. Therefore, there are corresponding devices in the air pipe 4 that can divide and/or pressurize the gas and deliver it as required into the different receiving positions of the algae tank.

Fig. 6 shows the structure diagram of the algae barrel of the flue gas haze removal and carbon reduction microalgae culture system according to the present invention. As shown in the figure, there is a bung 51 on the top of the algae tank 5. After the bung 51 is installed, the algae tank 5 is closed, and the inside of the algae tank 5 is filled with water, and microalgae are cultivated in the water, and the microalgae generally choose cyanobacteria or green algae. Or Chlorella, capable of absorbing CO2 in the gas exported from the trachea for photosynthesis and exporting oxygen. There are also some auxiliary equipment for microalgae cultivation inside the algae barrel 5, mainly including light source device, aeration device and stirring device.

The light source device includes a plurality of vertically fixed LED lamp posts 52, preferably four in the present invention, which are evenly distributed in various positions in the algae barrel, and a power supply 53 is provided on the top of each LED lamp post 52, and the power supply 53 It can provide electricity to make the LED lamp post 52 emit light, and provide the necessary lighting conditions for the photosynthesis of microalgae. The light emitted by the LED lamp post 52 is generally a combination of red and blue light, with a spectrum of 500-800nm, which is beneficial to the growth of microalgae. Pay special attention to the waterproof treatment of the shell of the power supply 53, and try not to touch the water surface.

The aeration device mainly includes a plurality of aeration pans 54 arranged at the bottom of the algae bucket and an aeration conduit 55 connected to all the aeration pans 54. The vertical conduit 55 is fixed in the algae bucket, and its top is passed through the bucket cover. 51 communicates with the trachea 4, and the bottom end extends to the bottom of the algae bucket 5 and extends to the side with multiple branches. Among the present invention, the preferred number of aeration discs 54 is two, which can be installed on each branch respectively.

The aeration conduit 55 can receive the gas input from the gas pipe 4 and deliver it to each aeration pan 54 . The aeration pan 54 is a device that can promote the material exchange between gas and liquid. The C gas is transferred to the water through the aeration pan 54, and can transfer from the gas phase to the liquid phase to form tiny bubbles. When soaking in water, it will touch the surface of microalgae and provide the necessary CO2 for photosynthesis of microalgae.

Described stirring device comprises a plurality of jet tubes 56, and jet tube 56 is made up of two parts of liquid outlet pipe 561 and inlet pipe 562, and liquid outlet pipe 561 and inlet pipe 562 are all vertically fixedly arranged in algae bucket, and wherein liquid outlet pipe The upper and lower ends of 561 open to the same lateral direction, the bottom end is located at the bottom of the algae barrel 5, and the top is located not far above the water surface; while one end of the air inlet pipe 562 is connected to the middle section of the liquid outlet pipe 561, and the other end extends to pass through the barrel. The cover 51 communicates with the gas pipe 4 .

When the jet pipe 56 is working, the air inlet pipe 562 can receive the gas imported from the air pipe 4 and deliver it to the liquid outlet pipe 561. Since the liquid outlet pipe 561 is mostly located in the water, the water in the liquid outlet pipe 561 will The gas input by the intake pipe pushes and sprays out from the upper and lower ends of the liquid outlet pipe 561 . Water ejected from multiple jet tubes 56 forms a vortex in the algae tank, which produces a stirring effect, which moves the air bubbles and microalgae, increases the contact probability of the air bubbles and microalgae, and improves the photosynthesis efficiency of the microalgae.

Generally speaking, in order to effectively form the vortex, the gas input from the air pipe 562 is often required to have a relatively high flow rate. For this point, the air pipe 4 can be used to pressurize the gas input into the jet tube 56 in a targeted manner, or it can be Adopt some other means, such as installing venturi tubes and other devices that can increase the gas flow rate on the jet tube 56 . In addition, in order to increase the spraying distance of water, a section of horizontal extension pipe 563 can also be installed at the upper and lower ports of the liquid outlet pipe 561 .

Figure 7 shows a top view of the distribution of multiple jet tubes in the algae bucket. As shown in the figure, the openings of the liquid outlet pipes 561 of the plurality of jet pipes 56 are all distributed in the same flow direction, which can be clockwise or counterclockwise, so that the jet pipe 56 sprays water through the liquid outlet pipe 561 and the extension pipe 563 , it can form a vortex in the water more effectively and promote the stirring effect.

After the microalgae are matured, the algae water can be separated and harvested, that is, the mature microalgae is separated from the water, and collected from the algae barrel. The main process of algae water separation and harvesting is: introducing the raw liquid in the algae barrel into an algae liquid collection pool; The filtration principle can intercept the algae liquid, so that the higher concentration algae liquid is enriched, concentrated and precipitated in the membrane pool, and separated from the lower concentration of water. When the algae liquid settles to a certain amount, such as more than half, the formed algae mud can be discharged for harvesting, and then the algae water separation can be continued.

After the reaction in the algae tank, most of the CO2 in the gas is used for the photosynthesis of the microalgae, and some other acidic gases such as SO2, NO and NO2 are further removed, among which SO2 and other gases may even be completely removed .

Table 1 shows the detection results of various pollutant gases when the flue gas is just discharged and after being processed by this system. Among them, the main pollutant gas components in the flue gas are NO2, NO, SO2, CO and CO2, etc. In addition, there are some other nitrogen oxides, which can be represented by NOX. In addition, because the dates of several inspections are not exactly the same, due to factors such as weather, there is a considerable gap between some data and other data.

Table 1 Detection data of various pollutant gas contents before and after flue gas treatment

As shown in Table 1, the content of each pollutant gas component in the flue gas is relatively high when it is just discharged, among which, the content of NO2 is generally 30-80mg/m ³ , and the content of NO is generally 80-160mg/m ^3. The content of other nitrogen oxides NOX is generally around 150-280mg/m3, the content of SO2 is higher, often around 280-380mg/ ^m3 , and the volume concentration of CO2 is generally between 5%-6%.

It can also be clearly seen in Table 1 that after a series of processing steps of the flue gas treatment method of this system, mainly after the steps of spray washing and microalgae cultivation for the components of polluted gases, the final values of each gas measured in the algae tank are obtained. Pollution gas content, the content of NO2 is generally below 3mg/ ^m3 , sometimes the content is 0, and the total removal rate reaches 96.2%; the highest NO2 content is only about 11mg/ ^m3 , and the total removal rate reaches 92.0%; others The content of nitrogen oxides NOX generally does not exceed 20mg/m, and the total removal rate is 93.0%; SO2 is removed more thoroughly, and the content is 0 in most cases, and the total removal rate even reaches 99.8%; CO is generally It is oxidized into CO2, and after CO2 is used to cultivate microalgae in the algae tank, the volume concentration is reduced to about 0.2%, and the total removal rate is 96.2%. From the data provided in the table, it can be obtained that the content of each pollutant gas after treatment is greatly reduced, and sometimes some gases are even completely removed.

The above is only the inspection made by the manufacturer of this system on the flue gas treatment of this system. In addition, the manufacturer also entrusted Jiangsu Huachuang Testing Technology Service Co., Ltd. to do an exhaust gas inspection of this system, and issued an authoritative inspection Report, report number UHTI1703EV0029. The exhaust gas test results in the test report are shown in Table 2.

Table 2 Exhaust gas test results of the test report

As shown in Table 2, it can be proved that this system has a high removal effect on the main pollutants and gases such as particulate matter, mercury and its compounds, nitrogen oxides, sulfur dioxide and carbon dioxide in the exhaust gas emitted from the chimney, especially Particulate matter with a solid structure has a removal rate of 99%; while the removal rate of carbon dioxide is 98%, indicating that it has fully played a role in microalgae cultivation. It can be seen that this system can indeed achieve a very good flue gas treatment effect.

Among them, each analysis item of the test report is analyzed with reference to the reference standards and analysis methods stipulated by the state, as shown in Table 3.

Table 3 Description of test report

In addition, since the algae barrel in the present invention is closed, the breeding process needs to be monitored by a computer, and its pH value, CO2 content, flow rate, temperature, light, salinity and other conditions can be adjusted through the computer. The closed microalgae culture is different from the previous open-air microalgae culture. It avoids the influence of natural environmental factors such as rainy and dry seasons and excessive temperature differences on the growth of microalgae, stabilizes the growth rate of microalgae, and effectively increases the production of microalgae. It also facilitates the sorting and harvesting of finished microalgae.

On the one hand, the microalgae culture system in the present invention can gradually process the flue gas to avoid the pollution of the flue gas to the environment; on the other hand, it can release oxygen from the algae tank to improve the air quality; , food, energy, biotechnology, and environmental detection and purification lamps have important uses in many fields, achieving considerable economic benefits.

The above are only some embodiments of the present invention. For those skilled in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention.

Claims (10)

1. flue gas subtracts carbon both culturing microalgae system except haze, it is characterised in that：The system includes

Cyclone dust collectors (1), can be passed through the flue gas of discharge, and remove the big dust particle in flue gas；

Spray scrubber (2), is connected with the cyclone dust collectors (1), can remove fine solid particle particle and the portion in flue gas Divide sour gas；

VOCs processing equipments (3), are connected with the spray scrubber (2), can decompose the organic exhaust gas in flue gas；

Tracheae (4), is connected with the VOCs processing equipments (3), can export gas distribution and/or pressurization；

Algae bucket (5), is connected with the tracheae (4), and inside cultivation has microalgae, can absorb the gas exported from tracheae；

Wherein, the VOCs processing equipments (3) include atomization aeration system (33) and nanometer microbubble system (34), use super oxygen Nanometer microbubble technology is handled flue gas；

The algae bucket (5) is closing, and inside is provided with light supply apparatus, aerator and multiple agitating devices, the aerator It is connected with the agitating device with the tracheae (4).

2. flue gas according to claim 1 subtracts carbon both culturing microalgae system except haze, it is characterised in that：The light supply apparatus includes Power supply (53) is equipped with the top of many vertical LED posts (52), the every LED post (52).

3. flue gas according to claim 1 subtracts carbon both culturing microalgae system except haze, it is characterised in that：The aerator includes Multiple aeration plates (54) for being placed on described algae bucket (5) bottom and an aeration being all connected with each aeration plate (54) are led Manage (55), the aeration conduit (55) is connected with the tracheae (4).

4. flue gas according to claim 1 subtracts carbon both culturing microalgae system except haze, it is characterised in that：The agitating device includes Many jet pipes (56), the jet pipe (56), which has, to be vertically arranged and drain pipe (561) that upper and lower ends are open in the same direction, and The air inlet pipe (562) that one end is connected with the drain pipe (561) stage casing and the other end is connected with the tracheae (4).

5. flue gas according to claim 4 subtracts carbon both culturing microalgae system except haze, it is characterised in that：The drain pipe (561) Two ports up and down the extension (563) of a piece level is installed.

6. a kind of flue gas processing method, it is characterised in that：Comprise the following steps：

1) cyclone dust removal：Flue gas is passed through cyclone separator (1) and carries out gas solid separation, the big dust particle in flue gas is removed；

2) spray washing：By by step 1) flue gas after dedusting is passed into spray scrubber (2) and carries out spray washing, remove Fine solid particle particle and partially acidic gas in flue gas；

3) VOCs processing：By by step 2) flue gas after spray washing is passed through VOCs processing equipments (3), micro- using super oxygen nanometer Bubbler techniques are handled, and decompose organic exhaust gas therein；

4) both culturing microalgae absorbs：By by step 3) processing after gas by tracheae (4) be passed through cultivation have microalgae algae bucket (5), light source is coordinated microalgae is carried out photosynthesis；

5) algae water separation harvesting：The microalgae for cultivating ripe is separated from water, and collection collects out out of algae bucket (5).

7. a kind of flue gas processing method according to claim 6, it is characterised in that：Step 2) in partially acidic gas bag Include sulfide and nitrogen oxides.

8. a kind of flue gas processing method according to claim 6, it is characterised in that：By step 3) processing after gas in The volumetric concentration of CO2 gases is 3%~20%.

9. a kind of flue gas processing method according to claim 6, it is characterised in that：Step 4) in light source be red, blue light Collocation, spectrum is 500-800nm.

10. a kind of flue gas processing method according to claim 6, it is characterised in that：Step 4) in microalgae for blue-green algae or Green alga or chlorella.