CN211886116U - Activated carbon adsorption tank and unpowered adsorption waste gas treatment system - Google Patents
Activated carbon adsorption tank and unpowered adsorption waste gas treatment system Download PDFInfo
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- CN211886116U CN211886116U CN202020325601.0U CN202020325601U CN211886116U CN 211886116 U CN211886116 U CN 211886116U CN 202020325601 U CN202020325601 U CN 202020325601U CN 211886116 U CN211886116 U CN 211886116U
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Abstract
The utility model discloses an active carbon adsorption jar and unpowered absorption exhaust-gas treatment system. The unpowered adsorption waste gas treatment system comprises a silk screen demister, an activated carbon adsorption tank and an exhaust funnel which are connected in sequence; the waste gas pipeline is connected with an inlet of the silk screen demister, and a flame arrester and a cut-off valve are sequentially arranged on the waste gas pipeline; the outlet of the wire mesh demister is connected with the air inlet of the activated carbon adsorption tank; the exhaust funnel is connected with the air outlet of the active carbon adsorption tank. The utility model discloses entire system equipment investment is few, the working costs is low, easy operation, area is little, the stable performance, can not cause secondary pollution to can manage multiple mist simultaneously. Can be effectively suitable for the standard-reaching treatment of the waste gas with low concentration and small gas amount in the sewage treatment plant.
Description
Technical Field
The utility model belongs to the exhaust-gas treatment field, more specifically relates to an active carbon adsorption jar and unpowered absorption exhaust-gas treatment system.
Background
The existing waste gas treatment technologies include the following:
first, adsorption method
The adsorption method is to make the waste gas contact with porous solid matter (adsorbent) with large surface by utilizing the adsorption capacity of the solid surface, and the pollutant in the waste gas is adsorbed on the surface of the adsorbent to separate the pollutant from the gas mixture, thereby achieving the purpose of purification. The method has the advantages of good pollutant removal effect, low energy consumption, reusability of the adsorbent after desorption and regeneration, and suitability for the concentration of 1000-20000 mg/m3And treating the waste gas with small gas amount.
The currently common adsorption methods include activated carbon adsorption, activated carbon fiber adsorption, molecular sieve rotating wheels and the like. Among them, activated carbon adsorption is the most widely used, which relies on physical adsorption, i.e., the effective adsorption area of the surface to adsorb contaminants.
Molecular sieve rotating wheels are an emerging adsorption method for organic waste gas treatment in recent years. The molecular sieve wheel is generally divided into three sections, a reaction zone, a cooling zone and a regeneration zone. The organic waste gas becomes relatively clean air after flowing through the treatment zone. Part of the waste gas containing organic pollutants is driven by a regeneration fan, heated to a certain temperature after flowing through the cooling zone, and then flows through the regeneration zone of the rotating wheel. When the regeneration air flows through the rotating wheel, the organic pollutants adsorbed on the rotating wheel are desorbed and simultaneously carried away by the regeneration air. The molecular sieve has a certain adsorption effect on organic solvents, so the molecular sieve is commonly used for treating waste gas in industries such as paint spraying, printing and the like.
Two, plasma method
The plasma method is a new technology for treating malodorous gases, and utilizes a high-purity metal substrate with an embedded electrode, and a grounding electrode is pressed into the substrate to form an ion generating sheet or an ion generating tube. Then, a high-frequency high-voltage alternating current is applied, and discharge is developed along the surface of the substrate near the electrodes. Can generate a large amount of alpha particles which collide with oxygen in the air to generate a large amount of positive and negative oxygen ions and strong oxidizing free radicals O, OH and HO2And the like. The ions, free radicals and excited molecules are very chemically active and can react with H in a short time2S、NH3、CH3SH、VOCSThe organic matter in the malodorous pollutant is oxidized and decomposed into harmless small componentsSub-substance (mainly CO)2And H2O), finally achieving the purification purpose.
Third, biological method
The principle of biological treatment method for treating organic waste gas is that active microorganism takes organic components in waste gas as energy or nutrient of life activity of the active microorganism, and organic matter is biodegraded by utilizing metabolic process, so that organic pollutants in the waste gas are converted into simple inorganic matter. The biological method is a harmless organic waste gas treatment mode, has simple process equipment, low investment and operation cost and does not produce secondary pollution.
The biological treatment process can be divided into an attached growth system and a suspended growth system according to the form of microorganisms existing in the waste gas treatment process. Microorganisms in the attached growth system are attached to a solid medium, and waste gas is adsorbed and absorbed when passing through a fixed bed and is finally degraded by the microorganisms, wherein a typical mode is a biological filtration method; microorganisms exist in a liquid in a suspension growth system, and waste gas enters a liquid phase through mass transfer so as to be degraded by the microorganisms, wherein a typical mode is a biological absorption method which is mainly used for treating the waste gas with high solubility in water; while a typical mode of simultaneously having both growth system characteristics is bio-trickling. Compared with other two biological methods, the biological trickling filtration method has the advantages of higher pollutant load, simple operation, easy control and suitability for the treatment of volatile organic waste gas.
Fourthly, heat treatment method
The heat treatment technology mainly refers to a combustion method, the method has high pollutant removal efficiency and good effect, almost all hydrocarbon organic waste gas and malodorous gas can be treated, and common combustion methods comprise heat storage combustion and catalytic combustion.
Regenerative combustion is a process in which volatile organic compounds in exhaust gas are oxidized with oxygen in the air in a high-temperature environment (about 815 ℃) in an oxidation furnace to produce water and carbon dioxide, which are discharged into the atmosphere to purify the exhaust gas.
The catalytic combustion is to oxidize combustible components in the waste gas into CO under the action of a catalyst at a lower temperature (200-400 ℃), and2and H2O, toThe purpose of the purge gas. Compared with regenerative combustion, catalytic combustion has relatively low temperature and higher safety.
Solvent absorption method
The solvent absorption method is to contact liquid absorbent with organic waste gas to absorb harmful components in the waste gas with liquid for purifying, and the absorption process is to perform gas molecular diffusion or turbulent diffusion between gas phase and liquid phase to transfer matter. The absorption method is suitable for treating waste gas with high solubility, and has low investment and operation cost and high safety.
The molecular sieve runner and activated carbon adsorption and other methods are used for treating the waste gas with low concentration and small gas amount, the adsorbent regeneration needs steam or hot air for heating, the cost is high, and the economic benefit is poor for the waste gas with low concentration and small gas amount.
The plasma technology is used for treating the gas, the operation cost is high, the energy consumption is high, and secondary pollution (such as SO) can be caused2，NOxCO), and the like, and the service life of the ion tube remains to be examined.
The biological method is suitable for treating organic waste gas with large gas amount and low concentration, and has poor economy for low-concentration waste gas with small gas amount.
The regenerative combustion is not suitable for waste gas with low concentration, if the intake concentration is low, the released reaction heat is insufficient, the combustion temperature cannot be reached, additional energy needs to be supplemented, or a concentration pretreatment unit is added at the front end to improve the intake concentration, so the economy of the waste gas with low concentration is poor; in addition, the reaction temperature of the regenerative combustion is high, certain potential safety hazards exist, the investment cost is high, and the occupied area is large.
The catalytic combustion method also has the problem of intake gas concentration, and is not suitable for the treatment of low-concentration waste gas. Meanwhile, the waste gas contains substances such as sulfur, halogen, chlorine and the like, so that catalyst poisoning and inactivation are easily caused, and the pollutant removal rate is reduced or even no treatment effect is realized; the catalyst replacement cost is high, and the investment and operation cost is high.
Absorption processes have low removal rates for less soluble materials, such as benzene; and the absorbed solvent is easy to form secondary pollution, the removal efficiency of the malodorous pollutants is limited, and the malodorous pollutants can not directly meet the requirement of emission standards when being used alone.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to solve the above problems and to develop a catalyst suitable for low concentrations (non-methane total hydrocarbon concentrations < 1000 mg/m)3) Small gas amount (Q < 1000 Nm)3And/h), and has simple operation, excellent economy and small floor area.
In order to achieve the above object, a first aspect of the present invention provides an activated carbon adsorption tank, including:
a tank body;
the porous outer cylinder and the porous inner cylinder are positioned in the tank body and are coaxially arranged; an annular gas distribution area is formed between the porous outer cylinder and the inner wall of the tank body; an annular adsorption area is formed between the porous inner cylinder and the porous outer cylinder; a discharge area is formed inside the porous inner cylinder;
the air inlet is arranged at the bottom of the side wall of the tank body;
the gas outlet is arranged at the top of the tank body and communicated with the discharge area;
the charging port is arranged at the top of the tank body and is communicated with the adsorption area;
the first discharge opening is arranged at the bottom of the tank body and communicated with the adsorption area;
the annular gas distributor is arranged at the bottom of the tank body and is connected with the gas inlet;
the bottom of the activated carbon adsorption tank body is provided with a condensation discharge port connected with the adsorption area, and the condensation discharge port is also provided with a punching plate.
Preferably, the charging openings are a plurality of openings, symmetrically distributed around the axis of the tank.
Preferably, the bottom of the activated carbon adsorption tank adopts a conical bottom plate.
Preferably, the bottom of the activated carbon adsorption tank body is provided with a second discharge opening, the second discharge opening forms an included angle of 40-50 degrees with the horizontal direction, and a gate valve is arranged.
Preferably, a hollow heat insulation layer is arranged on the outer wall of the tank body.
A second aspect of the present invention provides an unpowered adsorptive waste gas treatment system, which comprises a wire mesh demister, an activated carbon adsorption tank and an exhaust funnel, which are connected in sequence; the activated carbon adsorption tank is the activated carbon adsorption tank;
the waste gas pipeline is connected with an inlet of the silk screen demister, and a flame arrester and a cut-off valve are sequentially arranged on the waste gas pipeline;
the outlet of the wire mesh demister is connected with the air inlet of the activated carbon adsorption tank;
the exhaust funnel is connected with the air outlet of the activated carbon adsorption tank.
Preferably, a breather valve is further arranged between the flame arrester and the cut-off valve, and the breather valve is directly connected with the exhaust funnel.
Preferably, the unpowered adsorption waste gas treatment system further comprises a nitrogen protection pipeline, wherein the nitrogen protection pipeline is connected with a nitrogen interface arranged in a gas distribution area of the activated carbon adsorption tank and is used for conveying nitrogen to the activated carbon adsorption tank;
the nitrogen protection pipeline is sequentially provided with an optional pressure reducing valve, an optional flow limiting orifice plate, a pneumatic switch ball valve and a one-way valve;
the activated carbon adsorption tank is also provided with a temperature transmitter; and the pneumatic switch ball valve is interlocked with the temperature transmitter interface and is used for controlling the transmission of nitrogen.
Preferably, an impingement plate with a groove structure is arranged at a nitrogen interface of a gas distribution area of the activated carbon adsorption tank.
The utility model has the advantages that:
the unpowered adsorption waste gas treatment system also comprises a nitrogen protection pipeline, so that the safety of the unpowered adsorption waste gas treatment system is ensured. Compare with commonly used exhaust treatment methods such as biological method, heat treatment method, plasma method, solvent absorption method, the utility model discloses need not power equipment and provide power for gas, active carbon adsorption jar pressure loss is no longer than 500Pa, and entire system pressure loss is no longer than 1500Pa, and gas can pass through entire system under the effect of self pressure, realizes that malodorous gas adsorbs the processing, therefore the equipment investment is few. And the required public works are only nitrogen, so the operation cost is low.
The waste gas treatment device adopts an unpowered adsorption process. The exhaust gas is contacted with porous solid matter (adsorbent) with large surface by utilizing the adsorption capacity of the solid surface, and pollutants in the exhaust gas are adsorbed on the surface of the adsorbent to be separated from the gas mixture, so that harmful substances in the exhaust gas can be effectively removed, and the aim of purification is fulfilled.
The whole system has the advantages of low equipment investment, low operating cost, simple operation, small occupied area, stable performance, no secondary pollution and capability of simultaneously treating various mixed gases. Can be effectively suitable for the standard-reaching treatment of the waste gas with low concentration and small gas amount in the sewage treatment plant.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention with reference to the attached drawings, wherein like reference numerals generally represent like parts in exemplary embodiments of the present invention.
Fig. 1 shows a schematic structural view of an activated carbon adsorption tank according to an embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of an unpowered adsorption exhaust treatment system according to an embodiment of the present invention.
Fig. 3 shows a schematic structural view of an annular gas distributor according to an embodiment of the present invention.
Fig. 4 shows a schematic distribution diagram of the charging opening of the activated carbon adsorption canister according to an embodiment of the present invention.
Fig. 5 shows a schematic view of a fender structure according to an embodiment of the present invention.
Fig. 6 shows a right side view of a fender structure according to an embodiment of the invention.
Description of reference numerals:
101-tank body, 102-porous outer cylinder, 103-porous inner cylinder, 104-gas distribution area, 105-adsorption area, 106-discharge area, 107-gas inlet, 108-gas outlet, 109-charging opening, 110-first discharge opening, 111-second discharge opening, 112-hollow heat insulation layer, 113-condensation discharge opening, 114-gate valve, 115-annular gas distributor and 116-temperature transmitter interface;
201-a flame arrester, 202-a breather valve, 203-a shut-off valve, 204-a wire mesh demister, 205-an activated carbon adsorption tank, 206-an exhaust funnel, 207-a pressure reducing valve, 208-a flow limiting orifice plate, 209-a pneumatic switch ball valve and 210-a one-way valve;
501-impingement plate.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
According to the utility model discloses an active carbon adsorption jar, this active carbon adsorption jar includes:
a tank body;
the porous outer cylinder and the porous inner cylinder are positioned in the tank body and are coaxially arranged; an annular gas distribution area is formed between the porous outer cylinder and the inner wall of the tank body; an annular adsorption area is formed between the porous inner cylinder and the porous outer cylinder; a discharge area is formed inside the porous inner cylinder;
the air inlet is arranged at the bottom of the side wall of the tank body;
the air outlet is arranged at the top of the tank body and communicated with the discharge area;
the charging port is arranged at the top of the tank body and is communicated with the adsorption area;
the first discharge opening is arranged at the bottom of the tank body and communicated with the adsorption area;
the annular gas distributor is arranged at the bottom of the tank body and is connected with the gas inlet;
the bottom of the activated carbon adsorption tank body is provided with a condensation discharge port connected with the adsorption area, and the condensation discharge port is also provided with a punching plate.
Wherein, the mode of annular packing has increased the contact surface area of treating gaseous and packing, has improved the treatment effect of waste gas, and adopts the annular packing mode, and packing layer thickness reduces, and pressure loss is low, and activated carbon adsorption tank pressure loss is no longer than 500 Pa.
Wherein, annular gas distributor that the annular gas distributor can adopt the ordinary adoption of technical staff in the art, and annular gas distributor has guaranteed that the gas that gets into the active carbon adsorption tank can pass the adsorption zone uniformly, avoids appearing local filler high temperature or adsorbs saturation.
Preferably, the porous outer cylinder is a cylindrical structure formed by laying a wire mesh with the pore diameter smaller than the particle diameter of the material (such as activated carbon) in the adsorption area on a profile steel framework. According to a specific embodiment, the porous outer cylinder is formed by a plurality of square pipes to form a cylindrical framework, then 50mm by 50mm of silk screen is laid on the outer layer, 2mm by 2mm of silk screen is laid on the inner layer, and finally the cylindrical structure is formed.
According to a specific embodiment, the annular gas distributor is a perforated pipe surrounding the bottom of the adsorption zone and communicated with the gas inlet, and a plurality of small holes with the same diameter are uniformly distributed on the annular gas distributor.
Preferably, the charging openings are a plurality of charging openings which are symmetrically distributed around the axis of the tank body. The filling of the activated carbon adopts a form of top-in bottom-out, so that the problems that the activated carbon is not uniformly filled, and a filling cylinder has a gap, so that the gas to be treated is not directly discharged through an activated carbon layer are solved.
As an optimal scheme, the bottom of the activated carbon adsorption tank adopts a conical bottom plate, which is more beneficial to the activated carbon unloading process.
As a preferred scheme, the bottom of the tank body of the activated carbon adsorption tank is provided with a second discharge opening, the second discharge opening and the horizontal direction form an included angle of 40-50 degrees, and a gate valve is arranged. When the activated carbon reaches the adsorption saturation, the second discharge opening can be opened to discharge the activated carbon; the second discharge opening and the horizontal direction form an included angle of 40-50 degrees, and the gate valve is arranged, so that the situation that the activated carbon is scattered on the ground when a ton bag is replaced is effectively avoided, and the use is more convenient.
As preferred scheme, be provided with the cavity insulating layer on the outer wall of the jar body, the direct solar radiation leads to the inside active carbon temperature of equipment to rise when avoiding high temperature in summer, reduces ambient temperature to the influence of the inside active carbon of equipment, extension active carbon life, the security of improve equipment. As a further preferred scheme, the bottom of the hollow heat-insulating layer is provided with a small hole, which is beneficial to the gas circulation in the heat-insulating cavity.
The arrangement of the punching plate can discharge condensate and prevent the leakage of the active carbon. In a specific embodiment, the punching plate can be a punching plate with an aperture of 2.5mm and a thickness of 3 mm.
When the activated carbon adsorption tank is applied, waste gas to be treated enters the activated carbon adsorption tank from the gas inlet, uniformly passes through the adsorption area along the radial direction through the annular gas distributor, is collected to the discharge area, and is discharged through the gas outlet.
According to the embodiment of the utility model, the unpowered adsorption waste gas treatment system comprises a silk screen demister, an activated carbon adsorption tank and an exhaust funnel which are connected in sequence; the activated carbon adsorption tank is the activated carbon adsorption tank;
the waste gas pipeline is connected with an inlet of the silk screen demister, and a flame arrester and a cut-off valve are sequentially arranged on the waste gas pipeline;
the outlet of the wire mesh demister is connected with the air inlet of the activated carbon adsorption tank;
the exhaust funnel is connected with the air outlet of the active carbon adsorption tank.
According to the utility model discloses, the flame arrester has prevented the flame that waste gas probably takes place to stretch danger as a safety device, and the trip valve is used for cutting off waste gas in proper time.
As preferred scheme, the silk screen defroster adopts vertical box structure, and vertical structure more is favorable to gas-liquid separation, and gaseous in-process that passes the built-in silk screen of defroster from bottom to top, the vapor that carries in the gas under the effect of gravity and defogging silk screen and gas phase separation, defogging effect is better.
Preferably, a breather valve is further arranged between the flame arrester and the cut-off valve, and the breather valve is directly connected with the exhaust funnel. When the device is overhauled, the stop valve is closed, and waste gas is led to the exhaust funnel by the breather valve and is discharged to the atmosphere.
As the preferred scheme, spark arrester, trip valve, silk screen defroster pass through the pipe connection.
In order to ensure the safety of the unpowered adsorption waste gas treatment system, as an optimal scheme, the unpowered adsorption waste gas treatment system further comprises a nitrogen protection pipeline, the nitrogen protection pipeline is connected with a nitrogen interface arranged in a gas distribution area of the activated carbon adsorption tank and used for conveying nitrogen to the activated carbon adsorption tank, and the nitrogen interface can be arranged in the gas distribution area below the activated carbon adsorption tank;
the nitrogen protection pipeline is sequentially provided with an optional pressure reducing valve, an optional flow limiting orifice plate, a pneumatic switch ball valve and a one-way valve;
the activated carbon adsorption tank is provided with a temperature transmitter; the pneumatic switch ball valve is interlocked with the interface of the temperature transmitter and used for controlling the transmission of nitrogen.
The pressure reducing valve is used for reducing the pressure of nitrogen with higher pressure specification (the pressure of the nitrogen is more than 8000pa) to a proper range, so that the high-pressure gas is prevented from being filled into equipment to explode, and the safety of the equipment is improved; the function of the flow-limiting orifice plate is to avoid the instability of the gas pressure at the outlet of the pressure reducing valve, so a pressure reducing measure is added; the function of the check valve is to prevent the waste gas to be treated from entering the nitrogen pipeline;
the pneumatic switch ball valve is interlocked with the temperature transmitter interface and used for controlling the transmission of nitrogen. When the temperature of the activated carbon adsorption tank reaches a set high limit value, the temperature transmitter interlockingly opens a pneumatic switch ball valve on the nitrogen pipeline, nitrogen is filled into the activated carbon adsorption tank, so that the equipment is quickly separated from a high-oxygen environment, the risks of ignition and the like of the activated carbon due to overhigh temperature are avoided, and at the moment, cooling water can be manually sprayed on the outer wall of the equipment to cool. And after the temperature of the activated carbon adsorption tank is reduced to a set low limit value, the temperature transmitter interlocks and closes the pneumatic switch ball valve on the nitrogen pipeline, and the adsorption deodorization process is continued.
As preferred scheme, the nitrogen gas kneck in the gas distribution district of active carbon adsorption jar is equipped with the impingement baffle that has groove structure, further reduces the impact that gas pressure caused for equipment inside.
When unpowered absorption exhaust-gas treatment system used, waste gas from the sewage lift pit back of overflowing, loop through spark arrester, trip valve through the collection pipeline, then get into the silk screen defroster, and the water vapor that carries in the waste gas is got rid of to the silk screen defroster, avoids waste gas humidity too big to lead to the active carbon inefficacy. And the dehumidified tail gas enters an activated carbon adsorption tank for adsorption treatment, meets the emission standard required by the state and the owners, and is exhausted to the atmosphere through an exhaust funnel.
Examples
Fig. 1 shows a schematic structural view of an activated carbon adsorption tank according to an embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of an unpowered adsorption exhaust treatment system according to an embodiment of the present invention.
Fig. 3 shows a schematic structural view of an annular gas distributor according to an embodiment of the present invention.
Fig. 4 shows a schematic distribution diagram of the charging opening of the activated carbon adsorption canister according to an embodiment of the present invention.
Fig. 5 shows a schematic view of a fender structure according to an embodiment of the present invention.
As shown in fig. 2, an unpowered adsorption waste gas treatment system of the present embodiment includes a wire demister 204, an activated carbon adsorption tank 205, and an exhaust stack 206, which are connected in sequence;
the waste gas pipeline is connected with an inlet of the silk screen demister 204, and a flame arrester 201 and a cut-off valve 203 are sequentially arranged on the waste gas pipeline;
the outlet of the wire mesh demister 204 is connected with the air inlet of the activated carbon adsorption tank 205;
the exhaust pipe 206 is connected to the outlet of the activated carbon canister 205.
The wire mist eliminator 204 is of a vertical box type structure.
A breather valve 202 is also arranged between the flame arrester 201 and the shut-off valve 203, and the breather valve 202 is directly connected with an exhaust funnel 206. As the preferred scheme, spark arrester, trip valve, silk screen defroster pass through the pipe connection.
The unpowered adsorption waste gas treatment system further comprises a nitrogen protection pipeline, wherein the nitrogen protection pipeline is connected with a nitrogen interface (not shown) arranged in the gas distribution area 104 of the activated carbon adsorption tank 205;
a pressure reducing valve 207, an optional flow limiting orifice plate 208, a pneumatic switch ball valve 209 and a one-way valve 210 are sequentially arranged on the nitrogen protection pipeline;
the activated carbon adsorption tank 205 is also provided with a temperature transmitter; a pneumatic on-off ball valve 209 interlocks with a temperature transmitter (not shown) for controlling the delivery of nitrogen.
A baffle 501 with a groove structure is arranged at the nitrogen interface of the gas distribution area 104 of the activated carbon adsorption tank 205, as shown in fig. 5. The impingement plate is made of 304 stainless steel.
As shown in fig. 1, the activated carbon adsorption tank 205 includes:
a tank 101;
the porous outer cylinder 102 and the porous inner cylinder 103 are positioned in the tank body 101 and are coaxially arranged; an annular gas distribution area 104 is formed between the porous outer cylinder 102 and the inner wall of the tank body 101; an annular adsorption area 105 is formed between the porous inner cylinder 103 and the porous outer cylinder 102; the interior of the porous inner cylinder 103 forms a discharge zone 106;
an air inlet 107 arranged at the bottom of the side wall of the tank 101;
the air outlet 108 is arranged at the top of the tank body 101 and is communicated with the discharge area;
a charging port 109 provided at the top of the tank 101 and communicating with the adsorption zone 105;
a first discharge port 111 provided at the bottom of the tank 101 and communicating with the adsorption zone 105;
an annular gas distributor 115 arranged at the bottom of the tank 101 and connected with the gas inlet 107;
the bottom of the tank body 101 of the activated carbon adsorption tank 205 is provided with a condensate discharging port 113 connected with the adsorption area 105, and a punching plate (not shown) with the aperture of phi 2.5mm and the thickness of 3mm is further arranged at the condensate discharging port.
The porous outer cylinder is formed by surrounding a plurality of square pipes into a cylindrical framework, then 50 mm-50 mm silk screens are paved on the outer layer, 2 mm-2 mm silk screens are paved on the inner layer, and finally a cylindrical structure is formed.
As shown in figure 3, the annular gas distributor is a perforated pipe surrounding the filler layer and communicated with the gas inlet, and a plurality of small holes with the same diameter are uniformly distributed on the distributor. Figure 4 shows a schematic diagram of the distribution of the charging openings, 4, symmetrically distributed around the axis of the tank. The bottom of the activated carbon adsorption tank adopts a conical bottom plate. The bottom of the activated carbon adsorption tank body is provided with a second discharge opening 111, the second discharge opening 111 forms an included angle of 45 degrees with the horizontal direction, and a gate valve 114 is arranged. The outer wall of the tank 101 is provided with a hollow heat insulating layer 112.
The unpowered tail gas treatment equipment for the sewage lifting pool built by a certain petrochemical company adopts the unpowered adsorption waste gas treatment device, and the air input of the project design is 200Nm3H, treatment concentration is 500mg/m3. The gas inlet and outlet indexes are shown in table 1.
TABLE 1 exhaust gas flow and composition
| Item | Unit of | Is normal | Maximum of |
| Flow rate | m3/h | 200 | 200 |
| Acetone (II) | mg/m3 | 17 | 27 |
| Phenylmethyl ether | mg/m3 | 58 | 237 |
| Methanol | mg/m3 | 94 | 194 |
| Phenol and its preparation | mg/m3 | 3 | 5 |
| Steam of water | ％ | 4.8 | 4.8 |
This project waste gas comes from the sewage lifting pond escape of a certain petrochemical company, waste gas from the sewage lifting pond after the escape, loop through spark arrester 201, trip valve 203 through collecting the pipeline, then get into silk screen defroster 204, silk screen defroster 204 gets rid of the vapor that carries in the waste gas, tail gas after the dehumidification gets into activated carbon adsorption tank 205 and carries out the adsorption treatment, pass through annular gas distributor 115 radially uniformly and pass through adsorption zone 105, tail gas after activated carbon adsorption tank 205 treatment satisfies the emission standard that country and owner required, collect emission zone 106 after, through gas outlet 108, the rethread aiutation section of thick bamboo 206 is discharged to the atmosphere.
After the odor in the oily sewage lifting pond is treated by odor treatment equipment, the odor emission executes synthetic resin industrial pollutant emission standard (GB31572-2015), odor emission standard in Tianjin (DB 12/059) 2018 and volatile organic matter emission control standard in Tianjin industrial enterprise (DB12/54-2014), and the main indexes are detailed in Table 2.
TABLE 2 exhaust gas Outlet emission Limit
The specifications of the adsorbents used in the activated carbon adsorption tank 205 are shown in table 3.
TABLE 3 adsorbent specifications
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (9)
1. An activated carbon adsorption tank, comprising:
a tank body;
the porous outer cylinder and the porous inner cylinder are positioned in the tank body and are coaxially arranged; an annular gas distribution area is formed between the porous outer cylinder and the inner wall of the tank body; an annular adsorption area is formed between the porous inner cylinder and the porous outer cylinder; a discharge area is formed inside the porous inner cylinder;
the air inlet is arranged at the bottom of the side wall of the tank body;
the gas outlet is arranged at the top of the tank body and communicated with the discharge area;
the charging port is arranged at the top of the tank body and is communicated with the adsorption area;
the first discharge opening is arranged at the bottom of the tank body and communicated with the adsorption area;
the annular gas distributor is arranged at the bottom of the tank body and is connected with the gas inlet;
the bottom of the activated carbon adsorption tank body is provided with a condensation discharge port connected with the adsorption area, and the condensation discharge port is also provided with a punching plate.
2. The activated carbon adsorption canister of claim 1, wherein the charging port is plural and symmetrically distributed about an axis of the canister body.
3. The activated carbon adsorption tank of claim 1, wherein a conical bottom plate is used at the bottom of the activated carbon adsorption tank.
4. The activated carbon adsorption tank of claim 1, wherein a second discharge opening is arranged at the bottom of the tank body of the activated carbon adsorption tank, the second discharge opening forms an included angle of 40-50 degrees with the horizontal direction, and a gate valve is arranged.
5. The activated carbon adsorption canister of claim 1, wherein a hollow thermal insulation layer is disposed on an outer wall of the canister body.
6. The unpowered adsorption waste gas treatment system is characterized by comprising a silk screen demister, an activated carbon adsorption tank and an exhaust funnel which are connected in sequence; the activated carbon adsorption tank is the activated carbon adsorption tank of any one of claims 1 to 5;
the waste gas pipeline is connected with an inlet of the silk screen demister, and a flame arrester and a cut-off valve are sequentially arranged on the waste gas pipeline;
the outlet of the wire mesh demister is connected with the air inlet of the activated carbon adsorption tank;
the exhaust funnel is connected with the air outlet of the activated carbon adsorption tank.
7. The unpowered adsorption waste gas treatment system of claim 6, wherein a breather valve is further disposed between the flame arrestor and the shut-off valve, and the breather valve is directly connected to the exhaust stack.
8. The unpowered adsorption waste gas treatment system of claim 6 further comprising a nitrogen protection line connected to a nitrogen interface disposed in the gas distribution zone of the activated carbon adsorption canister for delivering nitrogen to the activated carbon adsorption canister;
a pressure reducing valve, a flow limiting orifice plate, a pneumatic switch ball valve and a one-way valve are sequentially arranged on the nitrogen protection pipeline;
the activated carbon adsorption tank is also provided with a temperature transmitter; and the pneumatic switch ball valve is interlocked with the temperature transmitter interface and is used for controlling the transmission of nitrogen.
9. The unpowered adsorption waste gas treatment system of claim 8, wherein a nitrogen interface of the gas distribution area of the activated carbon adsorption tank is provided with a baffle plate with a groove structure.
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| CN115554731A (en) * | 2022-10-24 | 2023-01-03 | 连云港贵科药业有限公司 | Preparation method of gemcitabine |
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