CN211753672U - Activated carbon adsorption system and flue gas treatment system with atmosphere protection structure - Google Patents
Activated carbon adsorption system and flue gas treatment system with atmosphere protection structure Download PDFInfo
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- CN211753672U CN211753672U CN201921712214.6U CN201921712214U CN211753672U CN 211753672 U CN211753672 U CN 211753672U CN 201921712214 U CN201921712214 U CN 201921712214U CN 211753672 U CN211753672 U CN 211753672U
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Abstract
The utility model discloses an active carbon adsorption system with an atmosphere protection structure and a flue gas treatment system, wherein the system comprises an active carbon adsorption tower, a raw flue gas inlet, a purified flue gas outlet and an active carbon layer, wherein the raw flue gas inlet, the purified flue gas outlet and the active carbon layer are arranged on the active carbon adsorption tower; a round roller blanking structure is arranged below a discharge hole at the bottom of the activated carbon layer; a transition section is arranged between the discharge port and the circular roller blanking structure, and an atmosphere protection structure is arranged on the transition section. The utility model prevents the escape of the flue gas by directly charging protective gas into the transition section and simultaneously cools the active carbon material layer of the transition section; the system can also charge inert ultrafine dust into the transition section, further isolate oxygen and improve the safety of the system; this system security is high, and the cooling separates oxygen effectually, prevents simultaneously that the flue gas that reveals from the adsorption tower from corroding conveying system, can move under the circumstances that the active carbon adsorption system does not shut down moreover, has improved the continuity and the stability of active carbon adsorption system operation, has improved work efficiency greatly.
Description
Technical Field
The utility model belongs to the technical field of flue gas purification equipment, concretely relates to active carbon adsorption system and flue gas processing system with atmosphere protection structure.
Background
The activated carbon flue gas purification technology has the advantage of multi-pollutant synergistic high-efficiency purification, and is suitable for complex sintering flue gas components (SO)2NOx, dust, O2Water vapor, heavy metal) and large temperature fluctuation (110-.
The activated carbon flue gas purification system is provided with a plurality of subsystems such as an adsorption system, an analysis system and an acid making system, flue gas is purified after passing through the activated carbon adsorption unit, activated carbon particles circularly flow between the adsorption unit and the analysis unit, and cyclic utilization of 'pollutant adsorption → pollutant heating analysis activation (pollutant escape) → cooling → pollutant adsorption' is realized. The flue gas purification device comprises a conveyor, a rotary valve, a round roller and other mechanical rotating equipment, wherein the conveyor is used for the transfer of activated carbon between adsorption and desorption, the round roller is used for controlling the blanking amount of an adsorption tower and an analytical tower, and the rotary valve plays a role in mechanical sealing.
The activated carbon adsorption tower is a cross flow (smoke transversely passes through a carbon layer, and activated carbon moves from top to bottom) layered adsorption tower type, three layers or two layers are divided in the tower, and the removal effect of each layer of activated carbon on pollutants is different: the front layer mainly plays the roles of dust removal, desulfurization and denitration; the middle layer is further desulfurized, dedusted and denitrated; deep desulfurization and dust removal of the rear layer, further denitration and dust suppression. In order to realize the best removal effect of the activated carbon on pollutants, the blanking speed of each layer of activated carbon needs to be controlled respectivelyA circular roller blanking structure is adopted, and a certain gap height is reserved between a circular roller and a blanking opening. The removal process of the activated carbon flue gas purification system to pollutants is as follows: SO in exhaust gas2The sulfuric acid is absorbed by the active carbon, and the ammonia is added to be converted into ammonium sulfate or ammonium bisulfate; the NOx in the exhaust gas and ammonia are subjected to SCR reaction and reduced into nitrogen, and the removal of the NOx is completed. Because the activated carbon is used for removing SO2In the process, substances such as ammonium sulfate and the like block microscopic pore channels, the specific surface area of the catalyst is reduced, and the adsorption performance of the activated carbon is influenced, so that the activated carbon adsorbing pollutants is sent to an analytic system through a conveying system for thermal regeneration treatment, and the regenerated activated carbon is conveyed to an adsorption tower through a conveyor for cyclic utilization. The activated carbon flue gas purification system can generate the following hidden dangers: firstly, in the circulation process of the activated carbon, a large amount of carbon powder is inevitably generated due to mechanical abrasion, and the ignition temperature of the activated carbon powder is about 165 ℃; ② active carbon to SO2The adsorption of (a) is a strongly exothermic reaction. If the activated carbon in the flue gas purification system is not smoothly fed and the sintering flue gas is short-circuited, SO is possibly caused2The heat released from the conversion to sulfuric acid causes the powdered activated carbon to ignite.
Meanwhile, in the past engineering practice, the rotary valve in the blanking of the adsorption tower belongs to a single sealing form, smoke can be leaked from the rotary valve along with the movement of the activated carbon, and the rotary valve contains SO after long-time operation and abrasion2The flue gas of pollutants will leak the conveying system from the adsorption tower in a large number, will take place the condensation corrosion phenomenon in conveying system, influence conveying equipment's life.
SUMMERY OF THE UTILITY MODEL
The utility model provides an active carbon adsorption system with atmosphere protection structure and a method for processing flue gas, aiming at the defects of the prior art, the utility model directly fills nitrogen or inert gas into the transition section to cool the active carbon material layer of the transition section, further fills inert ultrafine dust while filling gas, further isolates oxygen, and improves the safety of the system; the utility model provides a system security is high, and the cooling separates oxygen effectually, can move under the circumstances that the active carbon adsorption system does not shut down moreover, has improved the continuity and the stability of active carbon adsorption system operation, has improved work efficiency greatly.
In order to achieve the technical purpose, the utility model discloses the technical scheme who adopts specifically as follows:
according to the utility model discloses a first embodiment, an active carbon adsorption system with atmosphere protection structure, this system includes the active carbon adsorption tower. According to the trend of the flue gas, one side of the activated carbon adsorption tower is provided with a raw flue gas inlet, and the other side of the activated carbon adsorption tower is provided with a clean flue gas outlet. The multi-layer side-by-side type activated carbon adsorption tower is characterized in that a plurality of layers of activated carbon layers are arranged in the activated carbon adsorption tower, and porous plates are arranged between any two activated carbon layers. The bottom of each layer of the activated carbon layer is connected with the transition section, and the bottom of the transition section is provided with a circular roller blanking mechanism. And an atmosphere protection structure is arranged on the transition section. The atmosphere protection structure comprises a sealing cover, an air guide baffle plate and an air source. The air guide baffle plate is arranged on the side wall of the transition section, the sealing cover is connected with the transition section and surrounds the outside of the air guide baffle plate, the air source is communicated with the sealing cover through a first air pipe, and the inside of the sealing cover is communicated with the inside of the transition section through the air guide baffle plate.
Preferably, the system further comprises a temperature monitoring device. And a transition section at the bottom of the activated carbon layer of each layer is independently provided with a temperature monitoring device, and the temperature monitoring devices are used for monitoring the temperature in the transition section.
Preferably, the air guide partition plate is of a louver structure.
Preferably, the system further comprises an inert dust tank. The inert dust tank is arranged on the outer side of the transition section and is connected and communicated with an air source.
Preferably, the inert dust tank is one or more of a superfine calcium carbonate inert dust tank, a superfine calcium sulfate inert dust tank and a superfine magnesium carbonate inert dust tank.
Preferably, the gas source is one or more of nitrogen, helium, argon and xenon.
According to the utility model discloses a second kind of embodiment provides one kind and adopts in the first embodiment a flue gas processing system of active carbon adsorption system with atmosphere protection structure, this system still include the analytic tower of active carbon, according to the trend of active carbon, the analytic tower of active carbon is from last to being equipped with heating section, SRG section and cooling segment down in proper order. And a cooling medium inlet and a cooling medium outlet are arranged on the side wall of the cooling section. The cooling medium outlet is connected to the air source through a second air delivery pipe.
Preferably, the bottom of the activated carbon adsorption tower is provided with a buffer bin. The transition section is located above the interior of the surge bin. And a blanking rotary valve is arranged at the bottom of the buffer bin. The unloading rotary valve of active carbon adsorption tower is connected with the feed inlet of active carbon desorption tower through first active carbon conveyor. The upstream of first active carbon conveyor is equipped with first suction opening, and first suction opening is connected to the raw flue gas entry of active carbon adsorption tower through first gas pumping device.
Preferably, the discharge port of the activated carbon desorption tower is connected with the activated carbon feed port of the activated carbon adsorption tower through a second activated carbon conveying device. And a second air suction opening is arranged at the downstream of the second activated carbon conveying device and connected to a raw smoke inlet of the activated carbon adsorption tower through a second air suction device.
Preferably, the top of the activated carbon adsorption tower is provided with an activated carbon feed inlet, the activated carbon feed inlet is provided with a first double-layer sealing valve device, and the first double-layer sealing valve device is formed by serially connecting two independent sealing valves. One branch of the first gas pipe is a third gas pipe, and the tail end of the third gas pipe is connected between the two sealing valves of the first double-layer sealing valve device. Or one branch of the second gas pipe is a fourth gas pipe, and the tail end of the fourth gas pipe is connected between the two sealing valves of the first double-layer sealing valve device.
Preferably, the bottom of the activated carbon adsorption tower is provided with an activated carbon discharge hole. And a second double-layer sealing valve device is arranged at the active carbon discharge port and is formed by connecting two independent sealing valves in series. The other branch of the first gas pipe is a fifth gas pipe, and the tail end of the fifth gas pipe is connected between the two sealing valves of the second double-layer sealing valve device. Or the other branch of the second gas pipe is a sixth gas pipe, and the tail end of the sixth gas pipe is connected between the two sealing valves of the second double-layer sealing valve device.
Preferably, the height of the transition section is greater than the layer width of the activated carbon layer. The temperature monitoring device is provided with a plurality of temperature detection probes.
Preferably, an inlet grating plate is arranged between the raw flue gas inlet and the activated carbon adsorption tower. An outlet grid plate is arranged between the purified flue gas outlet and the activated carbon adsorption tower.
According to a third embodiment of the present invention, in the activated carbon adsorption system with atmosphere protection structure according to the first embodiment or in the flue gas treatment system according to the second embodiment, the method comprises the steps of:
1) raw flue gas enters the activated carbon adsorption tower from the raw flue gas inlet, the raw flue gas is purified through activated carbon adsorption, and purified clean flue gas is discharged from the clean flue gas outlet.
2) Fresh active carbon enters into the active carbon adsorption tower from the active carbon feed inlet at the top of the active carbon adsorption tower, and the active carbon adsorbs the purification at the inside on active carbon layer to the former flue gas that gets into, and the active carbon that has adsorbed the pollutant falls into the changeover portion of active carbon layer bottom, and the circle roller blanking structure via the changeover portion bottom is discharged and is carried to the analytic tower of active carbon and resolve at last, and the analysis back is carried to the active carbon adsorption tower again, circulates according to this.
3) Setting the safety critical temperature T of the activated carbon in the transition sectionIs provided with. The atmosphere protection structure monitors the temperature of the active carbon in the transition section in real time through a temperature monitoring device and records the temperature as TMeasuring. When T isMeasuring＜TIs provided withAt this time, the atmosphere protection structure is not activated. When T isMeasuring≥TIs provided withWhen the atmosphere protection structure is started and protective gas is conveyed into the transition section till TMeasuring＜TIs provided with。
Preferably, in step (a), the protective gas delivered by the atmosphere protecting structure into the transition section is one or more of nitrogen, helium, argon and xenon. Or the protective gas conveyed to the transition section by the atmosphere protection structure is derived from a heat exchange medium discharged from a cooling section of the activated carbon desorption tower.
Preferably, in step (iii), the protective gas delivered by the atmosphere protecting structure into the transition section further comprises inert dust. The inert dust is one or more of ultrafine calcium carbonate inert dust, ultrafine calcium sulfate inert dust and ultrafine magnesium carbonate inert dust.
Preferably, the method further comprises a step 4) of conveying the flue gas leaked into the first activated carbon conveying device to the activated carbon adsorption tower from the first suction port through the first gas pumping device. And sending the flue gas leaked into the second activated carbon conveying device to the activated carbon adsorption tower from the second air suction opening through the second air suction device.
Preferably, the method further comprises the step 5) that the third gas pipe or the fourth gas pipe conveys the protective gas to the position between the two sealing valves of the first double-layer sealing valve device at the activated carbon feeding port. And the fifth gas pipe or the sixth gas pipe conveys protective gas to a position between two sealing valves of the second double-layer sealing valve device at the active carbon discharge port.
Preferably, the safety critical temperature TIs provided withNot more than 160 deg.C, preferably not more than 155 deg.C, and more preferably not more than 150 deg.C.
The utility model discloses in, the active carbon adsorption tower is the active carbon tower type of cross-flow layering arrangement, for avoiding the flue gas to reveal from the active carbon bin outlet position downwards, can adopt the active carbon material of take the altitude to seal, and the material seals highly to be greater than active carbon bed layer thickness, and the definition material seals highly to be the changeover portion. In practical engineering, because the activated carbon moves from top to bottom under the action of gravity, the flue gas inevitably runs along with the downward-moving activated carbon, and because the flue gas contains SO2Water vapor, O2When substances are generated, sulfuric acid is generated in the transition section to generate a large amount of heat, the heat cannot be taken away by sintering flue gas, the high temperature of active carbon in the transition section is easily caused, the stable and safe operation of a system is influenced, and particularly when a bed layer is subjected to irresistible factors (such as control)Failure of the blanking round roller, failure of the conveyor and the like) to be changed into a fixed bed or an active carbon bed layer, the temperature is easier to rise when a flowing dead zone occurs; the utility model discloses a be provided with atmosphere protection structure on the changeover portion, activated carbon temperature risees to a certain degree and waits in the changeover portion, and atmosphere protection structure begins to intervene, through reaching the purpose of separating oxygen and cooling through the protective gas in to the changeover portion, has guaranteed flue gas adsorption system's safety and stability operation.
In the prior art, in order to ensure the safe and stable operation of the system in the activated carbon flue gas purification system, the temperature of the activated carbon flue gas purification system is generally controlled to be between 130 ℃ and 140 ℃. However, in the engineering operation, if the temperature of the transition section of a certain unit (assumed as the unit A) in the tower reaches 160 ℃, flue gas isolation is adopted, the baffle doors at the inlet and the outlet of the unit A are closed, then active carbon cooling measures are adopted, and the circulation quantity of the active carbon is increased, so that the sintering yield reduction is caused, and more importantly, if the temperature is difficult to reduce in a short time, the flue gas cannot be easily introduced into the unit A, and the risk of accelerating the temperature increase exists. The utility model discloses in, changeover portion one side (or some lateral walls) change is shutter structure (air guide baffle), and the shutter open position is close to the changeover portion and goes up along, and the shutter angle upwards prevents that the active carbon is excessive. Covering a sealing cover on the shutter structure, and adding one or more N2Or other protective gas addition port. When nitrogen or other inert gases are introduced, the gases can move towards the upper part and the lower part of the transition section, and the flue gas entering the activated carbon adsorption tower from the flue gas inlet is isolated from flowing downwards. Because the high temperature point is mainly concentrated on the transition section in the engineering, when the temperature is abnormal (if the temperature of the A unit is monitored to rise to 150 ℃), the temperature monitoring device feeds information back to the control device, the control device controls the gas source to immediately introduce nitrogen or other protective gas into the transition section, smoke flowing downwards along with the activated carbon is isolated, the oxygen content in the transition section is reduced, the high-temperature unit A can run under the condition that the high-temperature unit A does not shut down, the continuity and the stability of the system running are ensured, and the process efficiency is improved.
In the utility model, the activated carbon layer is arranged at the bottom of each layerAll independent temperature monitoring devices that are equipped with on the changeover portion, a plurality of temperature monitoring probes of temperature monitoring devices stretch into the change of the inside real-time supervision active carbon temperature of changeover portion. Setting the safety critical temperature of the activated carbon in the transition section as TIs provided with(TIs provided withNot greater than 160 deg.C, preferably not greater than 155 deg.C, and more preferably not greater than 150 deg.C. The temperature monitoring device monitors the temperature of the active carbon in the transition section in real time and records the temperature as TMeasuring. When T isMeasuring＜TIs provided withAt this time, the atmosphere protection structure is not activated. When T isMeasuring≥TIs provided withWhen the atmosphere protection structure is started, protective gas is conveyed into the transition section to carry out oxygen isolation and temperature reduction treatment on the high-temperature activated carbon in the transition section until TMeasuring＜TIs provided withAnd then the atmosphere protection structure stops conveying protective gas (the protective gas is one or more of nitrogen, helium, argon and xenon), and the process is circulated in sequence, so that the change of the temperature of the activated carbon is effectively monitored in real time, and effective measures are taken in time to ensure the safe and stable operation of the system.
Further, for improving the cooling and oxygen isolation effect, the utility model discloses also can adopt superfine inert dust such as calcium carbonate, calcium sulfate, magnesium carbonate, can get into the changeover portion under the drive of protective gas (for example nitrogen gas) air current, isolated decurrent flue gas, the safety and stability of assurance system. These inert ultrafine dusts can be coated with activated carbon to exclude oxygen. The added ultrafine dust enters a desorption system through a conveying system, the temperature of the desorption system is 430 ℃, sulfate is not decomposed, the ultrafine dust can be sieved out along with carbon powder through a vibrating screen after desorption, and the ultrafine dust cannot be brought into an adsorption system to cause influence.
Generally, the activated carbon desorption tower is provided with a heating section, an SRG section and a cooling section from top to bottom in sequence. And a cooling medium inlet and a cooling medium outlet are arranged on the side wall of the cooling section. The cooling medium is discharged from the cooling medium outlet after the heat transfer, the temperature of the cooling medium after the heat transfer is generally about 120 ℃, the utility model discloses in, carry to the changeover portion through the cooling medium (belong to the same kind of gas with protective gas) that has 120 ℃ with the air supply with this, one of its purpose forms updraft in the changeover portion, form the air current resistance, further prevent that the flue gas in the active carbon adsorption tower is downflow, the second of purpose is because the cooling medium after the heat transfer has the temperature about 120 ℃, can not lead to the active carbon temperature to rise on the one hand and take place the dangerous situation, can prevent on the contrary that super-cooled protective gas leads to the active carbon temperature in the active carbon adsorption carbon to hang down, thereby lead to the sulphide crystal to influence adsorption effect.
In the utility model, the active carbon is inevitably mixed with flue gas which is not easy to adsorb and treat in the process of being conveyed by the active carbon conveying device, meanwhile, when the active carbon in the active carbon adsorption tower adsorbs pollutants to be close to a saturated state or the problem of smoke gas leakage occurs, or the activated carbon adsorption tower fails, the flue gas containing a large amount of pollutants (especially sulfides) can cause great damage to the activated carbon conveying device after entering the activated carbon conveying device, therefore, the utility model is provided with the air suction opening and the air suction device at the position of the active carbon conveying device near one end of the active carbon adsorption tower, this gas pumping device is connected to the former flue gas entry of active carbon adsorption tower, and the flue gas that prevents to have the pollutant that just so can be fine causes the damage to active carbon conveyor, has further improved the stability of system, guarantees production efficiency.
The utility model discloses in, through the active carbon feed inlet at active carbon adsorption tower top all sets up double-deck seal valve device with the active carbon discharge gate position that is equipped with bottom thereof, further prevent that the interior pollutant flue gas stream that contains of active carbon adsorption tower from scurrying and getting into active carbon conveyor harm equipment, meanwhile, draw forth the cold medium conveyer pipe after pipeline and protective gas air supply or the heat transfer between double-deck seal valve device and be linked together, form the air current resistance to the pollutant flue gas that contains that probably reveals from the seal valve, prevent to contain the pollutant flue gas stream to advance active carbon conveyor one by one, can also play the guard action to the active carbon of convection current through the seal valve simultaneously, prevent that the high temperature from containing the active carbon high temperature emergence and the dangerous situation of pollutant flue gas messenger this department.
The utility model discloses can also be through addding controlling means. And the control device controls the temperature monitoring device, the gas source, the inert powder layer tank, the air draft device, the gas conveying pipeline, the valves and the like to carry out coordination control through lines respectively, so that the labor cost is saved to the maximum extent, meanwhile, the change of the real-time temperature value of the activated carbon in the transition section detected by the temperature monitoring device can be timely judged, and then whether a protection mechanism (the gas source and/or the inert dust tank) in the atmosphere protection structure is started or not is judged according to the change condition of the temperature value to take oxygen-isolating and cooling measures for the transition section.
The utility model discloses in, the lateral wall of changeover portion is for the air guide baffle of shutter structure, and shutter open position is close to the changeover portion and goes up along, and the shutter angle makes progress, and it is excessive to prevent and treat the active carbon. The sealing cover is connected with the transition section and surrounds the air guide partition plate, the air source is communicated with the sealing cover through one or more air pipes, the sealing cover is arranged to directly input protective gas and/or inert dust into the transition section, and in the process, the adsorption unit does not need to be stopped, namely, the adsorption unit can operate under the condition that a certain high-temperature unit does not stop, so that the continuity and the stability of the operation of the system are ensured. The gas transmission pipes are arranged to ensure that protective gas and/or inert dust can be timely and quickly input into the transition section to be subjected to oxygen insulation and cooling treatment, other gas transmission pipes can also continue to normally work under the condition that a certain gas transmission pipe is blocked, and the safety and the stability of the system are further ensured.
The utility model discloses in, can take the mode that lets in protective gas alone or let in the inert dust alone to the high temperature active carbon in the changeover portion, also can take the mode that lets in protective gas and inert dust simultaneously.
In the present invention, the vertical direction refers to a flowing direction of activated carbon in the activated carbon adsorption carbon, and the horizontal direction refers to a vertical horizontal direction with respect to the vertical direction.
The utility model discloses, to the condition that the flue gas that contains the pollutant takes place to leak in the active carbon adsorption tower easily, the technical scheme of the utility model this problem is solved through a plurality of technical means. If the flue gas leaks from the feed inlet or the discharge gate of active carbon adsorption tower, the utility model discloses also there is the problem that the flue gas leaked that the relevant technical means handled. The technical scheme of the utility model thoroughly solved the engineering difficult problem that the active carbon adsorption tower takes place the flue gas easily (the flue gas that contains the pollutant) and leaks from prevention, two aspects of processing, guaranteed the operation safety of active carbon adsorption tower, also avoided leaking the pollution of flue gas to the environment.
The utility model discloses in, through set up atmosphere protection architecture in the changeover portion, through to conveying gas in the atmosphere protection architecture, carry the effect that the gas in the changeover portion played the protection, force the flue gas in the active carbon adsorption tower toward the direction flow of clean flue gas export, avoided the flue gas to escape from active carbon discharge opening department.
As preferred, the utility model discloses can judge the temperature condition in the changeover portion through temperature monitoring device, if the flue gas gets into the changeover portion, oxysulfide in the flue gas reacts with vapor emergence, and the release heat will lead to the temperature rising of the active carbon in the changeover portion, through the temperature variation condition in the temperature monitoring device real-time detection changeover portion, can accurately judge whether there is the flue gas to leak to the changeover portion. If the temperature in the transition section rises, indicating that the flue gas has leaked into the transition section; at the moment, gas is introduced into the transition section, so that the flue gas in the transition section is forced to enter the activated carbon layer, and the flue gas is prevented from leaking from the circular roller blanking mechanism through the transition section; meanwhile, the risk of burning the activated carbon caused by overhigh temperature in the transition section is also avoided.
As the optimization, can add superfine dust in the gas that lets in the changeover portion, superfine dust intercommunication gas is carried to the changeover portion together in, and superfine dust adsorbs on the activated carbon surface, wraps up the activated carbon, plays the effect of isolated activated carbon and flue gas, and isolated activated carbon reacts with the flue gas in the flue gas to avoid the burning of activated carbon, further guaranteed the safe and stable operation of system.
Preferably, the heat exchange medium discharged from the cooling section of the desorption tower may be transported to the atmosphere protection structure. The cooling section of the active carbon desorption tower is fully utilized to discharge heat exchange medium with the temperature of about 120 ℃, and the heat exchange medium is conveyed into the transition section. According to the technical scheme, the heat exchange medium conveyed to the transition section is utilized to block the leakage of the flue gas in the activated carbon adsorption tower to the activated carbon discharge port; the temperature of the active carbon in the transition section can be ensured by utilizing the heat exchange medium with the temperature, and the phenomenon that the temperature of the active carbon in the transition section is too low to cause the condensation of the sulfide on the surface of the transition section is avoided, so that the corrosion of the sulfide on the active carbon adsorption tower is avoided.
If the flue gas leaks, the utility model discloses a set up double-deck seal valve device at active carbon feed inlet and active carbon bin outlet, let in protective gas in the middle of double-deck seal valve device, avoid the flue gas to leak to the air from active carbon feed inlet and active carbon bin outlet. The utility model discloses still be equipped with the suction opening on active carbon conveyor, will leak through updraft ventilator and take away to the flue gas among the active carbon conveyor, avoid the flue gas because external low temperature environment appearance "dewfall" phenomenon in active carbon conveyor to the corruption of leaking the flue gas to active carbon conveyor has been avoided. The flue gas leaked into the active carbon conveying device is conveyed to a raw flue gas inlet of the active carbon adsorption tower through the air draft device and is treated by the active carbon layer.
In the present invention, the height of the atmosphere protection structure is 2-300cm, preferably 5-200cm, more preferably 10-100 cm. The height of the transition section is 2-50cm, preferably 3-30cm, more preferably 5-20cm greater than the layer width of the activated carbon layer (103).
Compared with the prior art, the utility model discloses the beneficial technological effect who possesses as follows:
1. protective gas and/or inert dust can be quickly filled in the transition section, and oxygen-insulating and cooling treatment is timely and quickly carried out on high-temperature activated carbon in the transition section, so that the safety of the system is ensured;
2. by adopting the mutual synergistic effect of the real-time temperature monitoring and control unit and the like, a protection mechanism can be started before the temperature of the activated carbon is too high to reach a critical value effectively in time, the stability of the system is improved, and the production efficiency is improved;
3. the utility model discloses a scheme can be under the condition of not shutting down take oxygen separation cooling measure to arbitrary one or more adsorption unit, guarantee continuity, the stability of system operation.
4. The utility model discloses still adopt superfine inert dust such as calcium carbonate, calcium sulfate, magnesium carbonate, get into the changeover portion under the drive of nitrogen flow, can not only completely cut off decurrent flue gas, inert superfine dust can wrap up the active carbon moreover, and isolated oxygen guarantees the safety and stability of system, and these superfine dusts also can go out through the shale shaker after the analysis in addition, can not be brought into adsorption system.
Drawings
FIG. 1 is an overall structure diagram of the present invention;
FIG. 2 is a partial structure diagram of the transition section of the present invention;
FIG. 3 is a schematic view of the present invention with an inert dust tank;
FIG. 4 is a structural diagram of an activated carbon adsorption tower and an analytical tower of the present invention;
FIG. 5 is a structural diagram of an active carbon adsorption tower-desorption tower with an air draft mechanism;
fig. 6 is a structural view of the activated carbon adsorption tower of the present invention having a double-layered sealing valve assembly;
fig. 7 is a structural view of the carbon adsorption/desorption column of the present invention having a double-layered sealing valve unit.
Reference numerals: 1: an activated carbon adsorption tower; 101: a raw flue gas inlet; 102: a purified flue gas outlet; 103: an activated carbon layer; 104: a perforated plate; 105: a circular roller blanking structure; 106: a discharge outlet; 107: an inlet grill panel; 108: an outlet grid plate; 109: an activated carbon feed port; 110: a first double seal valve unit; 111: a discharge hole of the activated carbon; 112: a second double layer seal valve unit; 2: a transition section; 3: an atmosphere protection structure; 301: a sealing cover; 302: an air guide clapboard; 303: a gas source; 304: an inert powder layer tank; 4: a temperature monitoring device; 5: an activated carbon desorption tower; 501: a heating section; 502: an SRG segment; 503: a cooling section; 50301: a cooling medium inlet; 50302: a cooling medium outlet; 6: a buffer bin; 601: a blanking rotary valve; 602: a first suction opening; 603: a second suction opening; l1: a first gas delivery pipe; l2: a second gas delivery pipe; l3: a third gas delivery pipe; l4: a fourth gas delivery pipe; l5: a fifth gas delivery pipe; l6: a sixth gas delivery pipe; l7: a first activated carbon delivery device; l8: a second activated carbon delivery device; f1: a first gas pumping device; f2: a second gas pumping device.
Detailed Description
The technical solution of the present invention is illustrated below, and the claimed invention includes but is not limited to the following embodiments.
An activated carbon adsorption system with an atmosphere protection structure includes an activated carbon adsorption tower 1. According to the trend of the flue gas, one side of the activated carbon adsorption tower 1 is provided with a raw flue gas inlet 101, and the other side is provided with a clean flue gas outlet 102. The activated carbon adsorption tower 1 is internally provided with a plurality of layers of side-by-side activated carbon layers 103, and a porous plate 104 is arranged between any two activated carbon layers 103. The bottom of each layer of the activated carbon layer 103 is connected with the transition section 2, and the bottom of the transition section 2 is provided with a round roller blanking mechanism 105. And an atmosphere protection structure 3 is arranged on the transition section 2. The atmosphere protection structure 3 comprises a sealing cover 301, an air guide baffle 302 and an air source 303. The air guide partition plate 302 is arranged on the side wall of the transition section 2, the sealing cover 301 is connected with the transition section 2 and surrounds the air guide partition plate 302, the air source 303 is communicated with the sealing cover 301 through a first air conveying pipe L1, and the inside of the sealing cover 301 is communicated with the inside of the transition section 2 through the air guide partition plate 302.
Preferably, the system further comprises a temperature monitoring device 4. And a temperature monitoring device 4 is independently arranged on the transition section 2 at the bottom of each activated carbon layer 103, and the temperature monitoring device 4 is used for monitoring the temperature in the transition section 2.
Preferably, the air directing baffles 302 are louvered structures.
Preferably, the system further includes an inert dust tank 304. The inert dust tank 304 is arranged outside the transition section 2, and the inert dust tank 304 is connected and communicated with the gas source 303.
Preferably, the inert dust tank 304 is one or more of an ultrafine calcium carbonate inert dust tank, an ultrafine calcium sulfate inert dust tank and an ultrafine magnesium carbonate inert dust tank.
Preferably, the gas source 303 is one or more of nitrogen, helium, argon, and xenon.
The utility model provides a flue gas processing system, this system includes active carbon adsorption system and the active carbon analytic tower 5 that has atmosphere protection structure 3, according to the trend of active carbon, active carbon analytic tower 5 is from last to being equipped with heating section 501, SRG section 502 and cooling section 503 down in proper order. The side wall of the cooling segment 503 is provided with a cooling medium inlet 50301 and a cooling medium outlet 50302. The cooling medium outlet 50302 is connected to the air source 303 through a second air supply pipe L2.
Preferably, the bottom of the activated carbon adsorption tower 1 is provided with a buffer bin 6. The transition section 2 is located above the interior of the surge bin 6. The bottom of the surge bin 6 is provided with a blanking rotary valve 601. The blanking rotary valve 601 of the activated carbon adsorption tower 1 is connected with the feed inlet of the activated carbon desorption tower 5 through a first activated carbon conveying device L7. A first suction port 602 is arranged upstream of the first activated carbon conveying device L7, and the first suction port 602 is connected to the raw flue gas inlet 101 of the activated carbon adsorption tower 1 through a first gas pumping device F1.
Preferably, the discharge port of the activated carbon desorption column 5 is connected to the activated carbon feed port of the activated carbon adsorption column 1 via a second activated carbon transfer device L8. A second suction opening 603 is arranged at the downstream of the second activated carbon conveying device L8, and the second suction opening 603 is connected to the raw flue gas inlet 101 of the activated carbon adsorption tower 1 through a second gas suction device F2.
Preferably, an activated carbon feed port 109 is formed in the top of the activated carbon adsorption tower 1, a first double-layer sealing valve device 110 is arranged at the activated carbon feed port 109, and the first double-layer sealing valve device 110 is formed by serially connecting two independent sealing valves. The first air pipe L1 branches into a third air pipe L3, and the end of the third air pipe L3 is connected between the two sealing valves of the first double-layered sealing valve unit 110. Alternatively, the second air pipe L2 branches into a fourth air pipe L4, and the end of the fourth air pipe L4 is connected between the two sealing valves of the first double-layered sealing valve unit 110.
Preferably, the bottom of the activated carbon adsorption tower 1 is provided with an activated carbon discharge port 111. A second double-layer sealing valve device 112 is arranged at the activated carbon discharge port 111, and the second double-layer sealing valve device 112 is formed by connecting two independent sealing valves in series. The other branch of the first air duct L1 is divided into a fifth air duct L5, and the tail end of the fifth air duct L5 is connected between the two sealing valves of the second double-layer sealing valve device 112. Alternatively, the second air duct L2 branches into a sixth air duct L6, and the end of the sixth air duct L6 is connected between the two sealing valves of the second double-layered sealing valve unit 112.
Preferably, the height of the transition section 2 is greater than the layer width of the activated carbon layer 103. The temperature monitoring device 4 is provided with a plurality of temperature detection probes.
Preferably, an inlet grid plate 107 is arranged between the raw flue gas inlet 101 and the activated carbon adsorption tower 1. An outlet grid plate 108 is arranged between the clean flue gas outlet 102 and the activated carbon adsorption tower 1.
In the present invention, the height of the atmosphere protecting structure 3 is 2-300cm, preferably 5-200cm, more preferably 10-100 cm. The height of the transition section 2 is 2 to 50cm, preferably 3 to 30cm, more preferably 5 to 20cm greater than the layer width of the activated carbon layer 103.
Example 1
As shown in fig. 1 to 3, an activated carbon adsorption system having an atmosphere protection structure includes an activated carbon adsorption tower 1. According to the trend of the flue gas, one side of the activated carbon adsorption tower 1 is provided with a raw flue gas inlet 101, and the other side is provided with a clean flue gas outlet 102. The activated carbon adsorption tower 1 is internally provided with a plurality of layers of side-by-side activated carbon layers 103, and a porous plate 104 is arranged between any two activated carbon layers 103. The bottom of each layer of the activated carbon layer 103 is connected with the transition section 2, and the bottom of the transition section 2 is provided with a round roller blanking mechanism 105. And an atmosphere protection structure 3 is arranged on the transition section 2. The atmosphere protection structure 3 comprises a sealing cover 301, an air guide baffle 302 and an air source 303. The air guide partition plate 302 is arranged on the side wall of the transition section 2, the sealing cover 301 is connected with the transition section 2 and surrounds the air guide partition plate 302, the air source 303 is communicated with the sealing cover 301 through a first air conveying pipe L1, and the inside of the sealing cover 301 is communicated with the inside of the transition section 2 through the air guide partition plate 302. The height of the atmosphere protection structure 3 is 50 cm. The height of the transition section 2 is 10cm greater than the layer width of the activated carbon layer 103.
Example 2
Example 1 is repeated except that the system further comprises a temperature monitoring device 4. And a temperature monitoring device 4 is independently arranged on the transition section 2 at the bottom of each activated carbon layer 103, and the temperature monitoring device 4 is used for monitoring the temperature in the transition section 2.
Example 3
Example 2 is repeated except that the air directing baffles 302 are louvered structures.
Example 4
Example 3 was repeated except that the system further included an inert dust tank 304. The inert dust tank 304 is arranged outside the transition section 2, and the inert dust tank 304 is connected and communicated with the gas source 303.
Example 5
Example 4 was repeated except that the inert dust tank 304 was an ultrafine calcium carbonate inert dust tank.
Example 6
Example 5 was repeated except that the gas source 303 was nitrogen.
Example 7
As shown in fig. 4, the flue gas treatment system comprises an activated carbon adsorption system with an atmosphere protection structure 3 and an activated carbon desorption tower 5, wherein the activated carbon desorption tower 5 is provided with a heating section 501, an SRG section 502 and a cooling section 503 from top to bottom in sequence according to the trend of activated carbon. The side wall of the cooling segment 503 is provided with a cooling medium inlet 50301 and a cooling medium outlet 50302. The cooling medium outlet 50302 is connected to the air source 303 through a second air supply pipe L2.
Example 8
Example 7 was repeated, and as shown in fig. 5, the bottom of the activated carbon adsorption tower 1 was provided with a surge bin 6. The transition section 2 is located above the interior of the surge bin 6. The bottom of the surge bin 6 is provided with a blanking rotary valve 601. The blanking rotary valve 601 of the activated carbon adsorption tower 1 is connected with the feed inlet of the activated carbon desorption tower 5 through a first activated carbon conveying device L7. A first suction port 602 is arranged upstream of the first activated carbon conveying device L7, and the first suction port 602 is connected to the raw flue gas inlet 101 of the activated carbon adsorption tower 1 through a first gas pumping device F1.
Example 9
Example 8 was repeated, and as shown in FIG. 5, the discharge port of the activated carbon desorption column 5 was connected to the activated carbon feed port of the activated carbon adsorption column 1 via a second activated carbon transfer means L8. A second suction opening 603 is arranged at the downstream of the second activated carbon conveying device L8, and the second suction opening 603 is connected to the raw flue gas inlet 101 of the activated carbon adsorption tower 1 through a second gas suction device F2.
Example 10
Example 9 is repeated, and as shown in fig. 6, an activated carbon feed port 109 is formed in the top of the activated carbon adsorption tower 1, a first double-layer sealing valve unit 110 is disposed at the activated carbon feed port 109, and the first double-layer sealing valve unit 110 is formed by connecting two independent sealing valves in series. The first air pipe L1 branches into a third air pipe L3, and the end of the third air pipe L3 is connected between the two sealing valves of the first double-layered sealing valve unit 110.
Example 11
Example 10 is repeated, and as shown in fig. 6, the bottom of the activated carbon adsorption tower 1 is provided with an activated carbon discharge port 111. A second double-layer sealing valve device 112 is arranged at the activated carbon discharge port 111, and the second double-layer sealing valve device 112 is formed by connecting two independent sealing valves in series. The other branch of the first air duct L1 is divided into a fifth air duct L5, and the tail end of the fifth air duct L5 is connected between the two sealing valves of the second double-layer sealing valve device 112.
Example 12
Example 9 is repeated, as shown in fig. 6, except that the second air duct L2 branches into a fourth air duct L4, and the terminal end of the fourth air duct L4 is connected between the two sealing valves of the first double-layered sealing valve unit 110.
Example 13
In the example 12, as shown in fig. 7, the second air delivery pipe L2 branches into a sixth air delivery pipe L6, and the end of the sixth air delivery pipe L6 is connected between the two sealing valves of the second double-layered sealing valve unit 112.
Example 14
Example 13 was repeated, except that the height of the transition piece 2 was greater than the layer width of the activated carbon layer 103. The temperature monitoring device 4 is provided with a plurality of temperature detection probes.
Example 15
Example 14 was repeated except that an inlet grill plate 107 was provided between the raw flue gas inlet 101 and the activated carbon adsorption tower 1. An outlet grid plate 108 is arranged between the clean flue gas outlet 102 and the activated carbon adsorption tower 1.
Claims (11)
1. An active carbon adsorption system with atmosphere protection structure which characterized in that: the system comprises an activated carbon adsorption tower (1); according to the trend of the flue gas, one side of the activated carbon adsorption tower (1) is provided with a raw flue gas inlet (101), and the other side of the activated carbon adsorption tower is provided with a clean flue gas outlet (102); a plurality of layers of side-by-side activated carbon layers (103) are arranged in the activated carbon adsorption tower (1), and a porous plate (104) is arranged between any two activated carbon layers (103); the bottom of each layer of the activated carbon layer (103) is connected with the transition section (2), and the bottom of the transition section (2) is provided with a round roller blanking mechanism (105); an atmosphere protection structure (3) is arranged on the transition section (2); the atmosphere protection structure (3) comprises a sealing cover (301), an air guide partition plate (302) and an air source (303); the air guide partition plate (302) is arranged on the side wall of the transition section (2), the sealing cover (301) is connected with the transition section (2) and surrounds the air guide partition plate (302), the air source (303) is communicated with the sealing cover (301) through a first air pipe (L1), and the inside of the sealing cover (301) is communicated with the inside of the transition section (2) through the air guide partition plate (302);
wherein: the height of the atmosphere protection structure (3) is 2-300 cm.
2. The system of claim 1, wherein: the system further comprises a temperature monitoring device (4); a transition section (2) at the bottom of each activated carbon layer (103) is independently provided with a temperature monitoring device (4), and the temperature monitoring devices (4) are used for monitoring the temperature in the transition section (2); and/or
The air guide partition plate (302) is of a shutter structure.
3. The system of claim 2, wherein: the system also includes an inert dust tank (304); the inert dust tank (304) is arranged on the outer side of the transition section (2), and the inert dust tank (304) is connected and communicated with the gas source (303).
4. The system according to any one of claims 1-3, wherein: the top of the activated carbon adsorption tower (1) is provided with an activated carbon feeding hole (109), a first double-layer sealing valve device (110) is arranged at the activated carbon feeding hole (109), and the first double-layer sealing valve device (110) is formed by connecting two independent sealing valves in series; the first air pipe (L1) is divided into a branch which is a third air pipe (L3), and the tail end of the third air pipe (L3) is connected between two sealing valves of the first double-layer sealing valve device (110); and/or
The bottom of the active carbon adsorption tower (1) is provided with an active carbon discharge hole (111); a second double-layer sealing valve device (112) is arranged at the activated carbon discharge hole (111), and the second double-layer sealing valve device (112) is formed by connecting two independent sealing valves in series; the other branch of the first air pipe (L1) is divided into a fifth air pipe (L5), and the tail end of the fifth air pipe (L5) is connected between two sealing valves of the second double-layer sealing valve device (112).
5. A system according to claim 2 or 3, characterized in that: the height of the transition section (2) is larger than the layer width of the activated carbon layer (103); the temperature monitoring device (4) is provided with a plurality of temperature detection probes; and/or
An inlet grid plate (107) is arranged between the original flue gas inlet (101) and the activated carbon adsorption tower (1); an outlet grid plate (108) is arranged between the purified flue gas outlet (102) and the activated carbon adsorption tower (1).
6. A flue gas treatment system is characterized in that: the system comprises the activated carbon adsorption system with the atmosphere protection structure as recited in any one of claims 1 to 5, and further comprises an activated carbon desorption tower (5), wherein the activated carbon desorption tower (5) is provided with a heating section (501), an SRG section (502) and a cooling section (503) from top to bottom in sequence according to the trend of activated carbon; a cooling medium inlet (50301) and a cooling medium outlet (50302) are arranged on the side wall of the cooling section (503); the cooling medium outlet port (50302) is connected to the air source (303) through a second air pipe (L2).
7. The system of claim 6, wherein: a buffer bin (6) is arranged at the bottom of the active carbon adsorption tower (1); the transition section (2) is positioned above the interior of the buffer bin (6); a blanking rotary valve (601) is arranged at the bottom of the buffer bin (6); a blanking rotary valve (601) of the activated carbon adsorption tower (1) is connected with a feed inlet of the activated carbon desorption tower (5) through a first activated carbon conveying device (L7); a first air suction opening (602) is arranged at the upstream of the first activated carbon conveying device (L7), and the first air suction opening (602) is connected to a raw flue gas inlet (101) of the activated carbon adsorption tower (1) through a first air suction device (F1); and/or
The discharge hole of the active carbon desorption tower (5) is connected with the active carbon feed hole of the active carbon adsorption tower (1) through a second active carbon conveying device (L8); a second air suction opening (603) is arranged at the downstream of the second activated carbon conveying device (L8), and the second air suction opening (603) is connected to a raw flue gas inlet (101) of the activated carbon adsorption tower (1) through a second air suction device (F2).
8. The system of claim 6, wherein: the top of the activated carbon adsorption tower (1) is provided with an activated carbon feeding hole (109), a first double-layer sealing valve device (110) is arranged at the activated carbon feeding hole (109), and the first double-layer sealing valve device (110) is formed by connecting two independent sealing valves in series; the first air pipe (L1) is divided into a branch which is a third air pipe (L3), and the tail end of the third air pipe (L3) is connected between two sealing valves of the first double-layer sealing valve device (110); or the second air pipe (L2) branches into a fourth air pipe (L4), and the tail end of the fourth air pipe (L4) is connected between the two sealing valves of the first double-layer sealing valve device (110); and/or
The bottom of the active carbon adsorption tower (1) is provided with an active carbon discharge hole (111); a second double-layer sealing valve device (112) is arranged at the activated carbon discharge hole (111), and the second double-layer sealing valve device (112) is formed by connecting two independent sealing valves in series; the other branch of the first air pipe (L1) is divided into a fifth air pipe (L5), and the tail end of the fifth air pipe (L5) is connected between two sealing valves of the second double-layer sealing valve device (112); or the other branch of the second air pipe (L2) is divided into a sixth air pipe (L6), and the tail end of the sixth air pipe (L6) is connected between the two sealing valves of the second double-layer sealing valve device (112).
9. The system of claim 7, wherein: the top of the activated carbon adsorption tower (1) is provided with an activated carbon feeding hole (109), a first double-layer sealing valve device (110) is arranged at the activated carbon feeding hole (109), and the first double-layer sealing valve device (110) is formed by connecting two independent sealing valves in series; the first air pipe (L1) is divided into a branch which is a third air pipe (L3), and the tail end of the third air pipe (L3) is connected between two sealing valves of the first double-layer sealing valve device (110); or the second air pipe (L2) branches into a fourth air pipe (L4), and the tail end of the fourth air pipe (L4) is connected between the two sealing valves of the first double-layer sealing valve device (110); and/or
The bottom of the active carbon adsorption tower (1) is provided with an active carbon discharge hole (111); a second double-layer sealing valve device (112) is arranged at the activated carbon discharge hole (111), and the second double-layer sealing valve device (112) is formed by connecting two independent sealing valves in series; the other branch of the first air pipe (L1) is divided into a fifth air pipe (L5), and the tail end of the fifth air pipe (L5) is connected between two sealing valves of the second double-layer sealing valve device (112); or the other branch of the second air pipe (L2) is divided into a sixth air pipe (L6), and the tail end of the sixth air pipe (L6) is connected between the two sealing valves of the second double-layer sealing valve device (112).
10. The system of claim 6, wherein: the height of the transition section (2) is larger than the layer width of the activated carbon layer (103); and/or
An inlet grid plate (107) is arranged between the original flue gas inlet (101) and the activated carbon adsorption tower (1); an outlet grid plate (108) is arranged between the purified flue gas outlet (102) and the activated carbon adsorption tower (1).
11. The system according to any one of claims 7-9, wherein: the height of the transition section (2) is larger than the layer width of the activated carbon layer (103); and/or
An inlet grid plate (107) is arranged between the original flue gas inlet (101) and the activated carbon adsorption tower (1); an outlet grid plate (108) is arranged between the purified flue gas outlet (102) and the activated carbon adsorption tower (1).
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| CN112875348A (en) * | 2021-01-13 | 2021-06-01 | 中冶长天国际工程有限责任公司 | Method and system for quenching and cooling treatment of high-temperature activated carbon after conveyor |
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